Air conditioning system

Abstract

To provide an energy-saving air conditioning system capable of controlling a temperature in a room where an air conditioner is not installed and improving air quality by performing both of air cleaning and heat exchange ventilation.SOLUTION: A suction port L, an air blower and blowout ports 50, 51, 52, 53 are connected by an air supply air course. By using the air blower, air sucked from the suction port L is blown out from the blowout ports 50, 51, 52, 53. The suction port L is provided in a lower part of an air conditioner 966. Temperatures and air quantities of blowout air currents 970, 975 in the air conditioner 966 are controlled by a temperature of a space A and setting of an operation mode, set temperature and air quantity of the air conditioner 966. Through setting of a wind direction louver 996 of the air conditioner 966, an angle of the blowout air current 970, 975 of the air conditioner 966 is adjusted. By adjusting an air blowing amount of the air blower, a temperature of the air sucked from the suction port L can be adjusted relative to the temperature of the space A within 20K during heating and 10K during heating.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] This invention relates to a system for air conditioning multiple rooms within a building. [Background technology]

[0002] To achieve energy-efficient and comfortable living, homes are becoming increasingly airtight and well-insulated. A whole-house air conditioning system, which distributes conditioned air throughout the entire house, is ideal for highly airtight and well-insulated homes. Traditionally, this type of air conditioning system involves setting up an air conditioning room inside the building where air conditioners are installed, creating conditioned air, and distributing it to each room through ducts, etc. However, this system is not adopted when there is no space to set up an air conditioning room inside the building, or when it is not necessary to air condition most of the rooms in the building. In such cases, air conditioners are often installed only in the rooms where air conditioning is needed, but this has led to problems such as comfort issues due to temperature differences between rooms, power consumption issues due to operating multiple air conditioners, and space issues for installing multiple air conditioners. Furthermore, in order to create a comfortable living space even in rooms without air conditioning, a simple air conditioning system that blows air from a room with air conditioning into a room without air conditioning has been disclosed in several patent documents. In an air conditioning system in which an intake vent installed in the ceiling of a room with an air conditioner is connected to an air supply vent installed in the floor of a room without an air conditioner using a duct, a fan, and a damper, the system has an air conditioning function that indirectly warms rooms without air conditioners by transporting air near the ceiling that has been heated by the air conditioner in a living room to a room without an air conditioner, such as a bathroom, and blowing it out from the floor, and an air conditioning function that indirectly cools rooms without air conditioners by transporting air near the floor that has been cooled by the air conditioner in a living room to a room without an air conditioner, such as a bathroom, and blowing it out from the ceiling (see, for example, Patent Document 1). Furthermore, other air conditioning systems include a first room with an air conditioner, a second room, a circulating air passage for circulating air, and a fan for the circulating air passage. The air from the first room, which has been air-conditioned by the air conditioner, can be sent to the second room through the circulating air passage, and the air from the second room can be sent to the first room through the circulating air passage. (See, for example, Patent Document 2). Furthermore, other air conditioning systems involve installing an air conditioner and a blower with an air purification unit in one room within a building. The blower draws in conditioned air, purifies it, and then sends it out to a piping system along with outside air that has undergone heat exchange with the indoor air using a heat exchange ventilation system. The piping system then guides the conditioned air to each room, thereby regulating the air quality environment in each room (see, for example, Patent Document 3). [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Patent No. 6657057 [Patent Document 2] Japanese Patent Publication No. 2020-8246 [Patent Document 3] Japanese Patent Publication No. 2010-101600 [Overview of the project] [Problems that the invention aims to solve]

[0004] In the air conditioning system described in Patent Document 1, in a typical house, when heating, relatively warm air is drawn in from a ceiling intake in a room where an air conditioner is installed, and when cooling, relatively cool air is drawn in from a floor intake in a room where an air conditioner is installed. This air is then transported by a fan to a bathroom or other room where an air conditioner is not installed, indirectly heating or cooling that room. However, the purpose of this system is to heat or cool a bathroom or other room where an air conditioner is not installed while reducing the power consumption of the fan by utilizing the difference in density due to the temperature of the air. However, depending on the shape and size of the room where the air conditioner is installed, the positional relationship between the intakes connected to the air conditioner and the fan by ducts, the operating conditions such as the direction of airflow from the air conditioner, and the amount of air blown by the fan, the temperature inside the room where the air conditioner is installed is not uniform. As a result, this uneven air is transported, and the temperature inside the room where the air conditioner is not installed is also not uniform, resulting in rooms that do not heat up or cool down. For example, in winter, rooms with air conditioning may be too hot and rooms without it may be too cold, and in summer, rooms with air conditioning may be too cool and rooms without it may be too hot. This meant that both rooms could be uncomfortable, and the temperature in each room was left to chance. Furthermore, trying to force the temperature to approach the set temperature could lead to inefficient operation of the air conditioner and fan, potentially resulting in increased power consumption. In addition, there was no clear means for air to return from rooms without air conditioning to rooms with air conditioning. If there was no return airflow path and the door was closed, the amount of air delivered to the rooms without air conditioning would be insufficient, leading to increased power consumption and noise from the fan, and the rooms not warming up or cooling down effectively. The air conditioning system described in Patent Document 2 can indirectly heat or cool rooms where an air conditioner is not installed. However, similar to Patent Document 1, the installation locations and relative positions of the air conditioner, blower, air outlet, and intake are unclear, which means that the temperature may be uneven and uncomfortable in any room. No matter how much the airflow of the blower is increased, the temperature in rooms without an air conditioner will be significantly different from the set temperature of the air conditioner. For example, in winter, rooms with an air conditioner may be too hot and rooms without one may be too cold, and in summer, rooms with an air conditioner may be too cool and rooms without one may be too hot, making any room uncomfortable. Furthermore, there is a problem that power consumption may increase if the room without an air conditioner is forced to approach the set temperature. The air conditioning system described in Patent Document 3 can regulate the air quality environment in each room, but, similar to Patent Documents 1 and 2, it had the problem of uneven and unpleasant air quality in each room, as well as power consumption issues. Furthermore, the means of returning air from each room to the air conditioner and the airflow path of its air purification section were unclear, resulting in insufficient airflow to other rooms and inadequate air purification. In addition, the means of transporting heat-exchanged outside air to each room were unclear, leading to the problem of insufficient intake of outside air into each room.

[0005] The present invention aims to solve these conventional problems and provide an energy-saving air conditioning system that, in highly airtight and highly insulated buildings, can regulate the temperature of rooms without air conditioners with a relatively simple configuration, simultaneously purify the air, reliably reduce the amount of dust in rooms without air conditioners, and further improve air quality by reliably reducing CO2 concentration through heat exchange ventilation. [Means for solving the problem]

[0006] To achieve the above objective, the air conditioning system of the present invention provides a space K above space A in a highly airtight and highly insulated building, an air conditioner and an intake port L in space K, an opening below space K that connects to space A, an outlet in space B, a return air section between space A and space B that forms a return air passage from space B to space A, the intake port L, a blower, and the outlet are connected by an air supply passage, and the blower blows out the air drawn in by the intake port L from the outlet. The air intake port L is provided below the air conditioner, and the temperature and airflow of the air conditioner's discharged airflow are adjusted based on the temperature of the space A, the operating mode, set temperature, and airflow setting of the air conditioner, the angle of the air conditioner's discharged airflow is adjusted by setting the air direction louvers of the air conditioner, and the airflow rate of the blower is adjusted, thereby enabling the temperature of the air drawn in by the air intake port L to be within 20K during heating and within 10K during cooling relative to the temperature of the space A. This method, while not providing air conditioning for the entire building, allows for cooling a larger number of rooms and spaces while preventing condensation, due to the increased total airflow. Furthermore, since it does not require the use of living space such as rooms adjacent to the stairwell to accommodate ducts, etc., it is easy to design and easy to construct. Furthermore, by installing the intake vent in the ceiling cavity, the indoor unit and intake of the air conditioner are less conspicuous in terms of the room's design, resulting in a cleaner look. Another means is characterized by providing an electrostatic precipitator or HEPA filter for purifying the air drawn in by the intake port L, which can be removed from the front of the intake port L. This method not only allows for temperature control as described above, but also enables air purification, such as dust removal, by operating a blower to transport air from space A to space B and circulating it through a return air passage. This purifies the air in both spaces A and B, thereby improving air quality. Furthermore, since the electrostatic precipitator or HEPA filter can be removed from the front of the suction port L, periodic maintenance can be easily performed without the need for an inspection port. Another method is characterized by providing a return air blower in the return air passage instead of the return air section. This method can address situations where there is no structural space to install a return air vent, where it is desirable to prevent noise leakage from adjacent rooms through the return air vent, where privacy is better protected by keeping the door tightly closed, or where the space in the middle of the return air path is not air-conditioned in order to reduce the overall air conditioning load. Another method involves providing a heat exchange unit in an outdoor air intake passage connecting the outside and the inside of the building, and providing the same heat exchange unit in an indoor air exhaust passage connecting the inside of the building and the outside, thereby discharging indoor air to the outside while introducing outdoor air into the building, and exchanging heat between the indoor air and the outdoor air. This method allows for not only temperature control and air purification as mentioned above, but also the introduction of fresh air into the building by exchanging heat between indoor and outdoor air while exhausting indoor air. This fresh air is then supplied to spaces A and B by operating a fan, resulting in energy savings, reduced humidity and odors within the building, and a decrease in CO2 emissions. Another method involves installing an air conditioner and an intake port M in space A of a highly airtight and highly insulated building, and an outlet port in space B, with a return air section between space A and space B forming a return air passage from space B toward space A, connecting the intake port M, a blower, and the outlet port with an air conditioning air passage, and using the blower to blow out the air drawn in by the intake port M from the outlet, with the intake port M located below the air conditioner, and a front plate located in front of the air conditioner and the intake port M, and the front plate is used to control the air conditioner A portion of the discharged airflow is drawn into the intake port M, and the temperature and airflow of the discharged airflow of the air conditioner are adjusted based on the temperature of the space A, the operating mode of the air conditioner, the set temperature, and the airflow setting. The angle of the discharged airflow of the air conditioner is adjusted by setting the air direction louvers of the air conditioner, and the airflow rate of the blower is adjusted, thereby enabling the temperature of the air drawn in at the intake port M to be within 20K during heating and within 10K during cooling, relative to the temperature of the space A. With this method, when the air conditioner is in heating mode, the front panel is positioned appropriately, so by adjusting the set airflow of the indoor unit, the set angle of the air direction louvers, and the airflow of the fan, most of the high-temperature discharged airflow collides with the intake airflow in the mixing section, creating turbulence, mixing well to reach the target temperature, being drawn into the intake port, and blown out into each room, thus uniformly heating each room to the target temperature. Furthermore, the front panel hides the air intake and fan switch, improving the aesthetic appeal of the interior. Furthermore, the front panel reflects the operating noise from the air conditioner's indoor unit and the blower inside the intake, thus reducing noise from the front. Another method involves providing a space P below space A in a highly airtight and highly insulated building, installing an air conditioner and an intake N in space P, providing an outlet in space B, providing a return air section between space A and space B to form a return air passage from space B to space A, connecting the intake N, the blower, and the outlet with an air conditioning air passage, and pressurizing the air conditioning air passage with the blower. The air drawn in at the intake port N is blown out from the outlet, and the temperature and airflow of the air conditioner's discharged airflow are adjusted based on the temperature of the space A, the operating mode of the air conditioner, the set temperature, and the airflow setting. The angle of the air conditioner's discharged airflow is adjusted by setting the air direction louvers of the air conditioner, and the airflow rate of the blower is adjusted, thereby enabling the temperature of the air drawn in at the intake port N to be within 20K during heating and within 10K during cooling, relative to the temperature of the space A. This method allows the air conditioner to be operated in cooling mode. By adjusting the set airflow of the indoor unit, the set angle of the air direction louvers, and the airflow of the fan within space P, most of the low-temperature discharged air collides with the intake airflow in the mixing section, creating turbulence that mixes well, reaches the target temperature, is drawn into the intake, and blown out into each room. As a result, each room can be cooled uniformly to the target temperature, condensation does not form on the surface of space P, and mold growth is suppressed. Furthermore, since the air intake and indoor unit of the air conditioner are installed in space P below space A, the installation space in space A is unnecessary, improving the aesthetic appeal of the interior and preventing a further reduction in living space. Furthermore, since it can be installed in any space A where space P can be provided, this air conditioning system can be installed even in rooms where aesthetics of the interior are important, such as living rooms where guests come and go, making it easier to design and construct. Furthermore, because the system uses a blower to pressurize and blow air through the air conditioning duct, the pressure in the duct increases, making it difficult for outside air, moisture, dust, termites, etc., to enter through tiny gaps between the indoor and outdoor areas. As a result, condensation is less likely to form in the air conditioning duct, resulting in less moisture, less dust accumulation, cleaner conditions, and less damage to the building. Another method is characterized in that the air conditioning air passage is a duct or an airtight space within the building consisting of at least one of the inter-floor, underfloor, or attic spaces. This method allows for the design and construction of air conditioning systems that take advantage of their characteristics by using ducts and other methods to create different airflow paths. For example, if the air conditioning paths are airtight spaces within the building, such as between floors, under the floor, or in the attic, ducts are used as little as possible, eliminating the need for duct space and duct material costs, resulting in reduced construction time. However, if beams or other structures protrude significantly into the underfloor space, reducing the cross-sectional area, or if the return air path is long and the return air outlet is narrow, the airflow volume will be reduced. In such cases, a duct can be connected from space A, where the indoor unit of the air conditioner is installed, to the outlet in space B, which is located further away within the building, to directly blow air and ensure sufficient airflow. Furthermore, when the intake and outlet are connected by a duct, the ON / OFF and airflow settings of each fan can be varied using their respective switches. This allows for variable ON / OFF and strength control of the air conditioning in the room or space where the outlet is installed, enabling adjustment of comfort levels for each room or space, making it highly convenient. Another method is characterized by introducing outdoor air into the return air passage or the air conditioning air passage. This method introduces outdoor air into the return air duct and the air conditioning supply duct, where it is mixed with the large volume of conditioned air already flowing. This mixture is then circulated throughout the building as supply air, minimizing the use of ducts. As a result, duct space and duct material costs are eliminated, leading to reduced construction time. Another method is characterized in that the air conditioning duct is an airtight space within the building, at least one of the inter-floor, underfloor, or attic areas, and outside air is introduced into the air conditioning duct by pressurizing it with an outdoor air introduction fan. This method, by using an outdoor air intake fan to pressurize and introduce outdoor air into the air conditioning duct, increases the pressure in the underfloor space. This increases the pressure in the underfloor space, which is the air conditioning duct, making it difficult for outside air, moisture, dust, termites, etc., to enter through tiny gaps between the inside and outside. As a result, condensation is less likely to form in the underfloor space, moisture is reduced, dust does not accumulate, it can be kept clean, and the building is not damaged. [Effects of the Invention]

[0007] According to the present invention, in a highly airtight and highly insulated building, it is possible to provide an energy-saving air conditioning system that can regulate the temperature of rooms without air conditioners using a relatively simple system configuration, while simultaneously purifying the air, reliably reducing the amount of dust in rooms without air conditioners, and further improving air quality by performing heat exchange ventilation, thereby reliably reducing CO2 concentration while expelling moisture from within the building. Furthermore, the temperature and air quality, including dust, within the room where the air conditioner is installed can be made uniform, creating a more comfortable space. Furthermore, maintenance of electrostatic precipitators and other components can be easily performed from the room side, and energy savings can be further achieved by operating air conditioners, blowers, and other equipment according to their intended purpose on each floor. [Brief explanation of the drawing]

[0008] [Figure 1] Cross-sectional view of a building showing the configuration of the air conditioning system in Embodiment 1 of the present invention. [Figure 2] Perspective view of a room where an indoor air conditioner unit is installed. [Figure 3] Perspective view of the suction port [Figure 4] Cross-section of the suction port [Figure 5] Airflow diagram when heating other rooms takes priority. [Figure 6]Airflow diagram when prioritizing heating in your own room [Figure 7] Airflow diagram when air conditioning is prioritized for other rooms. [Figure 8] Airflow diagram when prioritizing air conditioning in your own room. [Figure 9] Cross-sectional view of the suction port in Embodiment 2 of the present invention [Figure 10] Airflow diagram when heating other rooms takes priority. [Figure 11] Airflow diagram for both rooms when heated [Figure 12] Airflow diagram when prioritizing heating in your own room [Figure 13] Airflow diagram when prioritizing air conditioning in other rooms. [Figure 14] Airflow diagram for both rooms when air conditioning is on. [Figure 15] Airflow diagram when prioritizing air conditioning in your own room. [Figure 16] Cross-sectional view of a building showing the configuration of the air conditioning system in Embodiment 3 of the present invention. [Figure 17] Airflow diagram when prioritizing air conditioning in other rooms. [Figure 18] Airflow diagram when prioritizing air conditioning in your own room. [Figure 19] Airflow diagram when heating other rooms takes priority. [Figure 20] Airflow diagram when heating is running in both rooms. [Figure 21] External view of a branch pipe in Embodiment 3 of the present invention [Figure 22] Cross-sectional view showing the configuration of the heat exchange unit in Embodiment 4 of the present invention. [Figure 23] This diagram shows the airflow diagram when cooling other rooms is prioritized, illustrating the configuration of the air conditioning system in Embodiment 5 of the present invention. [Figure 24] A diagram showing another configuration of the air conditioning system in Embodiment 5 of the present invention, illustrating the airflow when cooling other rooms is prioritized. [Figure 25] This diagram shows the airflow in a stairwell when cooling other rooms takes priority, illustrating the configuration of the air conditioning system in Embodiment 6 of the present invention. [Figure 26] Cross-sectional view of a building showing the configuration of the air conditioning system in Embodiment 7 of the present invention. [Figure 27]Cross-sectional view of a building showing the configuration of the air conditioning system in Embodiment 8 of the present invention. [Figure 28] Cross-sectional view of a building showing the configuration of the air conditioning system in Embodiment 9 of the present invention. [Figure 29] A diagram showing the airflow during cooling in a stairwell, illustrating the configuration of the air conditioning system in Embodiment 10 of the present invention. [Figure 30] Cross-sectional view of a building showing the configuration of the air conditioning system in Embodiment 11 of the present invention. [Figure 31] A cross-sectional view showing the airflow during heating in an entrance hall, illustrating the configuration of the air conditioning system in Embodiment 11 of the present invention. [Figure 32] This cross-sectional view shows the airflow diagram during heating in an entrance hall, illustrating the configuration of the air conditioning system in Embodiment 11 of the present invention. [Figure 33] A cross-sectional view showing the airflow during heating in a stairwell, illustrating the configuration of the air conditioning system in Embodiment 11 of the present invention. [Figure 34] This cross-sectional view shows the configuration of the air conditioning system in Embodiment 11 of the present invention, illustrating the airflow in a stairwell during heating. [Figure 35] A cross-sectional view showing the airflow during heating in a stairwell, illustrating the configuration of the air conditioning system in Embodiment 12 of the present invention. [Figure 36] A horizontal cross-sectional view showing the airflow during heating in a stairwell, illustrating the configuration of the air conditioning system in Embodiment 12 of the present invention. [Figure 37] This cross-sectional view shows the configuration of the air conditioning system in Embodiment 13 of the present invention, illustrating the airflow in the entrance hall during cooling. [Figure 38] A horizontal cross-sectional view showing the airflow during cooling in an entrance hall, illustrating the configuration of the air conditioning system in Embodiment 13 of the present invention. [Figure 39] A cross-sectional view showing the airflow during cooling in an entrance hall, illustrating the configuration of the air conditioning system in Embodiment 14 of the present invention. [Figure 40] A horizontal cross-sectional view showing the airflow in the entrance hall during cooling, illustrating the configuration of the air conditioning system in Embodiment 14 of the present invention. [Modes for carrying out the invention]

[0009] (Embodiment 1) Figure 1 is a cross-sectional view of a building showing the configuration of an air conditioning system in Embodiment 1 of the present invention. As shown in the diagram, air conditioning systems 1 and 2 are installed one system each on the first floor 4 and second floor 5 of a two-story building 3, which is a highly airtight and highly insulated house, and provide air conditioning and ventilation to the rooms and other areas within the building 3. In this embodiment, a room refers to a habitable room, and a space refers to both habitable and non-habitable rooms. A habitable room is a room used continuously for purposes such as living, working, conducting business, meeting, recreation, or other similar purposes, while a non-habitable room is any other room. However, rooms whose uses make it difficult to determine whether they are habitable should be judged according to their actual use. Building 3 is completely covered with insulation material (not shown) and airtight sheeting (not shown) to seal the exterior envelope, the roof 6 is roof insulated, the foundation 7 is foundation insulated, the windows are triple-glazed resin sashes 8, the doors are insulated doors (not shown), and including the attic space (insulated space) 9 and the underfloor space (insulated space) 10, all rooms and spaces within Building 3 are insulated spaces. There are two main types of insulation: external insulation and internal insulation. The choice of insulation method depends on the advantages and disadvantages of each. However, this study focuses on building 3, which has no insulation defects in its building envelope and meets at least the ZEH (Zero Energy House) insulation performance standards. Regarding airtightness performance, although it depends on the specifications of the airtight sheet, the target buildings are those that maintain the continuity of the airtight layer by applying airtight tape or similar to the seams of the airtight sheet, and that meet at least a C value of 1.0.

[0010] The indoor air conditioning units 15 and 16, which are part of the air conditioning system 1 and 2, are installed in the entrance hall 17 (space A) on the first floor and the stairwell 18 (space A) on the second floor, respectively. In this embodiment, the indoor air conditioning units 15 and 16 are installed in the entrance hall 17 and stairwell 18, but they may also be installed in living rooms such as the living room 20, bedroom 21, guest room 22, and children's room 23, or in non-living spaces such as the attic 9, underfloor space 10, under the stairs (not shown), and machine room (not shown). Similarly, the indoor units 15 and 16, which are part of the air conditioning system, are connected to the outdoor units 30 and 31 installed outside, respectively, by refrigerant piping and electrical wiring 32. This system is referred to as the air conditioner (air conditioning unit, not shown) on the first floor and the air conditioner (air conditioning unit, not shown) on the second floor. Furthermore, as part of the configuration of this air conditioning system 1 and 2, intake ports 42 and 43 (intake port C) containing air purification units 40 and 41 are installed below the walls 33 and 34 on which the indoor air conditioner units 15 and 16 are installed, and air outlets 50, 51, 52, and 53 are installed in the ceilings 44, 45, 46, and 47 of the living room 20, bedroom 21, guest room 22, and children's room 23 (space B), respectively. In order to blow out the air drawn in by intake ports 42 and 43 from air outlets 50, 51, 52, and 53, blowers 55 and 56 and branch pipes 60 and 61 are installed in the ceiling spaces 62 and 63, ducts 70, 71, 72, and 73 are passed through the wall space 75 and the ceiling space 62, and ducts 76, 77, 78, and 79 are passed through the wall space 80 and the ceiling space 63. By connecting the intake port 42, the blower 55, the branch pipe 60, and the outlets 50 and 52 in an airtight manner using ducts 70, 71, 72, and 73, an air supply passage is formed on the first floor, from the intake port 42 in the entrance hall 17 to the outlet 50 in the living room 20 and the outlet 52 in the guest room 22. By connecting the intake port 43, the blower 56, the branch pipe 61, and the outlets 51 and 53 in an airtight manner using ducts 76, 77, 78, and 79, an air supply passage is formed on the second floor, from the intake port 43 in the stairwell 18 to the outlet 51 in the bedroom 21 and the outlet 53 in the children's room 23.

[0011] Furthermore, as part of the configuration of the air conditioning systems 1 and 2, a return air vent 85 (return air section), such as an undercut, is provided in the door (not shown) between the guest room 22 and the living room 20, and a return air vent 86 (return air section), such as an undercut, is provided in the door (not shown) between the living room 20 and the entrance hall 17, thereby forming a return air passage on the first floor from the guest room 22 and the living room 20 to the entrance hall 17. A return air vent 87 (return air section), such as an undercut, is provided in the door (not shown) between the children's room 23 and the bedroom 21, and a return air vent 88 (return air section), such as an undercut, is provided in the door (not shown) between the bedroom 21 and the stairwell 18, thereby forming a return air passage on the second floor from the children's room 23 and the bedroom 21 to the stairwell 18. Then, the supply air passage and the return air passage on the first floor are connected, and on the first floor 4, the supply air, which is conditioned air mixed with the air blown out from the indoor unit 15 of the air conditioner in the entrance hall 17 and the air in the entrance hall 17, is drawn in from the intake port 42, passes through the duct 70, the blower 55, the duct 71, the branch pipe 60, the ducts 72 and 73, and is blown out from the outlet 50 in the living room 20 and the outlet 52 in the guest room 22, respectively. The conditioned return air passes through the return air outlets 85 and 86 and returns to the entrance hall 17, forming a circulating air passage (not shown) on the first floor. The supply air passage and return air passage on the second floor are connected, and on the second floor 5, the supply air, which is conditioned air mixed with the air blown out from the indoor unit 16 of the air conditioner in the stairwell 18 and the air in the stairwell 18, is drawn in from the intake port 43, passes through duct 76, blower 56, duct 77, branch pipe 61, ducts 78 and 79, and is blown out from the outlet 51 in the bedroom 21 and the outlet 53 in the children's room 23, respectively. The conditioned return air passes through return air outlets 87 and 88 and returns to the stairwell 18, forming a second-floor circulating air passage (not shown).

[0012] In the entrance hall 17 and the stairwell 18, heat exchange units 95 and 96 are installed in the ceiling spaces 62 and 63 respectively. These units introduce outside air into the room and expel indoor air to the outside, recovering all the heat from the indoor air into the outside air. This provides ventilation for the first floor 4 and second floor 5 of building 3, respectively. In this embodiment, the heat exchange units 95 and 96 have a 24-hour ventilation airflow of 100 m³. 3 / h, strong notch ventilation airflow 150m 3At a rate of / h, the total heat exchange rate is approximately 70%. In the ceilings of toilets 100 and 101 within building 3, ventilation vents 102 and 103, such as exhaust grilles, are provided to exhaust the air from inside toilets 100 and 101, and are connected to heat exchange units 95 and 96. Outdoor exhaust hoods 105 and 106 are installed in the penetration holes of the exterior wall of building 3, and are connected to heat exchange units 95 and 96 by exhaust ducts 107 and 108. The heat exchange units 95 and 96 each include an introduction fan (not shown) for introducing outdoor air, an exhaust fan (not shown) for exhausting indoor air, a motor (not shown), and heat exchange elements 110 and 111 for recovering the total heat from the indoor air into the outdoor air. Furthermore, since the heat exchange units 95 and 96 are installed in contact with the ceilings of the toilets 100 and 101, the heat exchange elements 110 and 111 and the pre-filters for the elements (not shown) can be easily cleaned and maintained from the ceilings of the toilets 100 and 101. As a result, the indoor air is exhausted through ventilation vents 102 and 103, the heat is recovered by heat exchange units 95 and 96, and the air is exhausted outside through exhaust ducts 107 and 108 and outdoor exhaust hoods 105 and 106. The indoor air exhaust passages on the first and second floors are formed between ventilation outlets 102 and 103 and outdoor exhaust hoods 105 and 106, respectively, and are formed by heat exchange units 95 and 96 and exhaust ducts 107 and 108, respectively. The indoor air exhaust passages are equipped with exhaust fans for the heat exchange units 95 and 96, but other exhaust fans may be provided in addition to or in conjunction with the exhaust fans. Outdoor air supply hoods 115 and 116 are installed in the penetration holes of the exterior wall of building 3, and are connected to heat exchange units 95 and 96 by air supply ducts A117 and 118.

[0013] Filter boxes 120 and 121 are installed in the air supply ducts A117 and 118, so as to be in contact with the ceilings of the toilets 100 and 101. Since the filter boxes 120 and 121 have an outside air purification filter (not shown) that purifies the outside air introduced into the ceiling space 62 and 63, maintenance such as cleaning the filter can be easily performed from the ceiling. Ventilation vents 125 and 126 are provided in the ceilings of the entrance hall 17 and the stairwell 18 to blow outside air into the building 3, and are connected to heat exchange units 95 and 96 by supply air ducts B130 and 131. As a result, outdoor air is introduced from outdoor air supply hoods 115 and 116, passes through air supply ducts A117 and 118, is purified in filter boxes 120 and 121, recovers total heat in heat exchange units 95 and 96, and is introduced into the room through air supply ducts B130 and 131 and ventilation inlets 125 and 126. The outdoor air intake passage is formed between the outdoor air supply hoods 115 and 116 and the ventilation air inlets 125 and 126, and is comprised of air supply ducts A117 and 118, filter boxes 120 and 121, heat exchange air units 95 and 96, and air supply ducts B130 and 131. The outdoor air intake passage is provided with intake fans for the heat exchange air units 95 and 96, but other intake fans may be provided in addition to or together with the intake fans.

[0014] Toilets 100 and 101 do not have air outlets for supplying conditioned air. Instead, louvers 135 and 136 are provided between them and the entrance hall 17 and the stairwell 18, respectively, allowing air to enter and exit. When the heat exchange units 95 and 96 are in operation, some of the return air, which is the conditioned air that has returned to the entrance hall 17 and the stairwell 18, flows into toilets 100 and 101 through louvers 135 and 136. When the air conditioning environment is stable, the air quality (temperature, humidity, cleanliness, etc.) inside toilets 100 and 101 is close to that of the conditioned air. When heat exchange units 95 and 96 are operated, fresh outdoor air, purified by filter boxes 120 and 121 installed in the outdoor air intake path, is introduced by the intake fans of heat exchange ventilators 95 and 96. A portion of the return air, which is air-conditioned air from rooms and other areas, and the air contaminated with moisture from so-called dirty zones such as toilets 100 and 101, are brought in through ventilation exhaust ports 102 and 103 and the indoor air exhaust path, and then entered by the exhaust fans of heat exchange units 95 and 96. After heat exchange with the outdoor air by heat exchange elements 110 and 111, the air is discharged outside. This prevents dust and mold spores from entering the building 3 from outside, and discharges moisture and odors from toilets and other areas to the outside. Through heat exchange, energy-saving ventilation of the building 3 is possible while reducing dust, moisture, and mold spores inside the building.

[0015] In this embodiment, ventilation exhaust ports 102 and 103 are provided in the toilets 100 and 101. However, ventilation exhaust ports and grilles may also be provided in other rooms or spaces that tend to generate and accumulate odors, moisture, harmful substances, etc., such as washrooms, bathrooms, and kitchens—so-called "dirty zones." In such cases, these can be discharged directly to the outside without passing through other rooms or spaces. However, if the heat exchange elements 110 and 111 of the heat exchange units 95 and 96 are not resistant to deterioration from moisture in bathrooms, oil in kitchens, etc., then a separate ventilation fan will need to be provided. Furthermore, ventilation exhaust vents 102 and 103 may be installed in rooms downstream of the circulation path (return air path), such as the entrance hall 17 and the stairwell 18. In this case, some of the indoor air from the room will be discharged outside along with dust and moisture generated by normal daily life in that room. However, to prevent moisture from the dirty zone from flowing into the room, it is necessary to install ventilation exhaust vents or another ventilation fan in the dirty zone.

[0016] Figure 2 is a perspective view of a room where an indoor air conditioner unit is installed. As shown in the diagram, the indoor air conditioning units (air conditioners) 15 and 16 that make up the air conditioning systems 1 and 2 are installed in the entrance hall 17 (space A) on the first floor and the stairwell 18 (space A) on the second floor, respectively. The height of the rooms in the entrance hall 17 and the stairwell 18 is approximately 2.4m, and the indoor air conditioner units (HVAC units) 15 and 16 are installed so that the height of their air outlets 140 and 141 is approximately 2m. Air intake ports 42 and 43 (intake port C) are installed above the center in the left-right direction of the indoor air conditioner units 15 and 16, below the walls 33 and 34 on which they are installed, at a height of approximately 1 meter or less. The intake ports 42 and 43 are installed with intake louvers 150 and 151 exposed from the walls 33 and 34 towards the room, while the main units 152 and 153 are installed concealed within the wall spaces 75 and 78 and connected to the ducts 70 and 76.

[0017] The indoor units 15 and 16 are wall-mounted indoor units of a separate-type air conditioner, each housing a heat exchanger (not shown) that performs heat exchange between the refrigerant and the air drawn in from the intake ports 142 and 143, and a cross-flow fan (not shown) in a single enclosure. They are connected to an outdoor unit (not shown) equipped with a compressor (not shown) by refrigerant piping and electrical wiring 32. The indoor units 15 and 16 can be operated using a remote control (not shown) to select between heating / cooling / dehumidification / stop modes, and the set airflow volume for the discharge air can be set to strong wind (approximately 10 m / s). 3 / min), medium wind (approx. 7m 3 / min), weak wind (about 5m 3 It can be adjusted to a minimum speed ( / min), the set temperature can be adjusted between 16°C and 30°C, and the angle of the airflow blown out from outlets 140 and 141 can be adjusted using air direction louvers 145 and 146. Furthermore, the indoor units 15 and 16 of the air conditioners are equipped with intake air temperature sensors (not shown), and based on the intake air temperature, set temperature, and set airflow rate, they control the inverter drive frequency of the compressor (not shown) of the outdoor unit (not shown), the electric expansion valve (not shown), and the outdoor fan (not shown), etc., to quickly bring the intake air temperature closer to the set temperature. This adjusts the enthalpy and circulation rate of the refrigerant flowing into the heat exchangers (not shown) of the indoor units 15 and 16, thereby controlling the air conditioning capacity provided by the air conditioners on the first and second floors, and adjusting the temperature and humidity of the airflow from the indoor units 15 and 16. The airflow louvers 145 and 146 allow you to adjust the angle of the blown airflow from "horizontal (0°)" to "15° (105°) from vertically downwards toward the wall" during heating, and from "horizontal (0°)" to "60° (60°) from horizontal downwards" during cooling.

[0018] Figure 3 is a perspective view of the suction port, and Figure 4 is a cross-sectional view of the suction port. As shown in the diagram, the intake ports 42 and 43 (intake port C) receive approximately 350 m³ of air, which is the airflow rate of the blowers 55 and 56. 3 It consists of intake louvers 150 and 151 with external dimensions of 450mm*450mm and a suitable intake area for drawing in / h, and main bodies 152 and 153, and has a pre-filter 155 and 156, air purification units 40 and 41, power supply units 157 and 158, air purification intake air passages 160 and 161, air purification sections 162 and 163, and air purification bypass intake air passages 165 and 166, and has duct connection sections 167 and 168 on the upper sides of the main bodies 152 and 153. Air purification units 40 and 41 are electrostatic precipitator filters that remove mainly visible coarse particles, with a particle size of 10 to 20 μm or larger, from the air drawn in from the intake louvers 150 and 151 through pre-filters 155 and 156. The air that flows into the air purification intake passages 160 and 161 is then further filtered by air purification units 40 and 41 to remove finer particles, with a particle size of 0.3 μm or larger, such as mold spores, dust, pollen, yellow sand, and airborne particles like PM2.5. The air then merges with the air that flows directly into the air purification bypass intake passages 165 and 166, and proceeds through duct connections 167 and 168, through ducts 70 and 76, to the blowers 55 and 56. The pre-filters 155 and 156 and air purification units 40 and 41 require regular cleaning and maintenance. Therefore, the intake louvers 150 and 151, located on the room side at a height of 1 meter or less, can be detached from the main unit 152 and 153 using springs, etc. After that, the pre-filters 155 and 156 can be easily removed, and the air purification units 40 and 41 can be pulled out from the air purification sections 162 and 163 of the main unit 152 and 153 by their handles. After maintenance, the units can be easily reassembled by reversing the process.

[0019] The ratio of the airflow through the air purification intake passages 160 and 161 to the airflow directly into the air purification bypass intake passages 165 and 166 is determined by the ratio of the areas of the intake louvers 150 and 151 and the pressure loss of the air purification units 40 and 41, but the intake ports 42 and 43 are sized to fit within the wall spaces 75 and 80. To ensure sufficient overall intake airflow (airflow volume) for regulating the temperature in rooms where an indoor air conditioner unit is not installed, the proportion of airflow directly flowing into the air purification bypass intake air passages 165 and 166 will be increased to a degree that does not cause excessive noise. Even if the amount of airflow flowing into the air purification intake air passages 160 and 161 decreases, prolonged operation will circulate the air through rooms within building 3 multiple times, gradually increasing the level of air purification (reduction of dust, etc.). In this embodiment, electric dust collection type air purification units 40 and 41 are used, but a HEPA filter type that passes fine filter paper such as a HEPA filter (High Efficiency Particulate Air Filter) may also be used. The choice should depend on the type and degree of dust, bacteria, harmful substances to be removed, the airflow rate and speed of the air passing through, the frequency of maintenance such as cleaning, and the noise level. For example, if the target is viruses with a particle size of 0.1 μm or larger that can be captured by a HEPA filter, a HEPA filter type should be used.

[0020] In Figure 1, the blowers 55 and 56 are equipped with DC motors (brushless DC motors) (not shown) and sirocco fans (not shown), which are more energy-efficient than AC motors and allow for stepless control of the rotational speed over a wider range. When the airflow is set using a switch (not shown), the sirocco fans rotate to draw air in from the intake ports 42 and 43 through the ducts 70 and 76. The drawn-in air flows through ducts 71 and 77, branch pipes 60 and 61, and ducts 72, 73, 78, and 79, and is blown out from the outlet 50 in the living room 20, the outlet 52 in the guest room 22, the outlet 51 in the bedroom 21, and the outlet 53 in the children's room 23. The air volume to be blown into the living room 20, the guest room 22, the bedroom 21, and the children's room 23 is determined from the volume of each room. Then, determine the specifications and number of air blowers, the size and number of suction ports and air outlets, the specifications of the branch pipes, etc. that can ensure the total air volume obtained by adding up the respective air volumes. The air volume required for air conditioning is at least 10 m 3 per 2.5 m 3 of the room per hour or more, and ideally about 25 m 3 / h. Adjust the air volume according to the air conditioning load such as the size of the room and solar radiation. Regarding the air volume required for air purification, if it satisfies the air volume required for the above air conditioning, even if the ratio of the air volume directly flowing into the air purification bypass suction air passages 165 and 166 in the total air volume of the suction ports 42 and 43 is 50%, the air purification frequency of each room is 0.8 times / h to 2.1 times / h, and the air in the room is completely purified at least once every 1.3 hours, so it is considered that a sufficient air environment can be obtained.

[0021] The air conditioning capacities of the air conditioners on the first floor and the second floor are calculated based on the air conditioning loads of the rooms and other areas to be air-conditioned, and the total is determined. That is, for the air conditioning load calculation, calculate the transmitted heat from the walls, windows, ceilings, etc. of the target rooms and other areas, the radiant heat of solar radiation transmitted through the window glass, the heat and moisture generated by the occupants in the room, the heat generated by lighting and mechanical equipment, and the heat and moisture due to the intake of outside air and gap air as the air conditioning load (Yamada Haruten, "Refrigeration and Air Conditioning", Japan, Yoshikentang Co., Ltd., March 20, , p, 240-247). Then, with a margin for this load calculation result, select the air conditioners for the first floor and the second floor from the air conditioners lined up by capacity to air-condition the rooms and other areas. In this embodiment, the total floor area of the entrance hall 17, the living room 20, and the guest room 22 on the first floor 4 and the total floor area of the staircase hall 18, the bedroom 21, and the children's room 23 on the second floor 5 are each approximately 50 m 2 , the ceiling height is 2.4 m, and air conditioners with a cooling capacity equivalent to 2.2 kW are installed in the entrance hall 17 and the staircase hall 18 respectively. The air volume blown into the living room 20, the guest room 22, the bedroom 21, and the children's room 23 is 175 m 3Assuming a value of / h, the total airflow volume for floors 1-4 and 2-5 is 350m³ each. 3 The fan speed is / h, and suitable fans 55 and 56, and intake ports 42 and 43 have been selected and installed accordingly.

[0022] In the above configuration, when heating, cooling, air purification, outside air intake, and indoor air exhaust are performed for the entrance hall 17, living room 20, and guest room 22 on the first floor (4), and for the stairwell 18, bedroom 21, and children's room 23 on the second floor (5), the operating status of each device and the airflow will be explained using the entrance hall 17 on the first floor (4) as a representative example, but the explanation for the stairwell 18 on the second floor (5) will be similar.

[0023] Figure 5 shows the airflow diagram in the entrance hall 17 when heating other rooms takes priority. In winter, when the outside temperature is approximately 7°C, and the entrance hall 17, living room 20, and guest room 22 are not being heated, and the goal is to heat the living room 20 and guest room 22 (where the air conditioner indoor unit 15 is not installed), but the entrance hall 17 does not need to be heated, this is called heating priority operation for other rooms. However, since the room temperature in the entrance hall 17 is not being heated, it is relatively low at approximately 15°C. The air conditioner indoor unit 15 is set to a higher temperature of 22°C using the remote control (not shown), and the fan speed is set to high to start heating operation. Then, the angle of the airflow louvers 145 is set to adjust the angle of the discharged airflow 170 to "vertically downward (90°)" or "vertically downward to the wall side at 15° (105°)", and the airflow volume of the blower 55 is set to high at 350m 3 When operated at / h, an intake airflow 171 is generated that is drawn into the intake port 42 located below the indoor unit 15 of the air conditioner. The air intake temperature of 15°C, drawn in from the intake port 142 of the indoor unit 15 of the air conditioner, is detected by an intake air temperature sensor (not shown). Based on this intake air temperature of 15°C, the remote control set temperature of 22°C, and the set airflow rate (high), the inverter drive frequency of the compressor (not shown) of the outdoor unit (not shown) of the air conditioner is driven at a high frequency, controlling the electric expansion valve (not shown) and the outdoor blower (not shown), etc., to adjust the enthalpy and circulation amount of the refrigerant flowing into the heat exchanger (not shown) of the indoor unit 15 of the air conditioner, thereby increasing the heating capacity of the air conditioner on the first floor, and adjusting the temperature of the discharged airflow 170 of the indoor unit 15 of the air conditioner to a higher 35°C.

[0024] The 170 airflow setting corresponds to approximately 10 m / s of the high fan speed during heating operation. 3 / min(600m 3 At 35°C, the airflow velocity is approximately 2 m / s 1 m below the air outlet 140 of the indoor unit 15, and approximately 1 m / s 2 m below that. At the intake port 42, which is located at a height of approximately 1 m or less below the wall 33 where the indoor unit 15 is installed, the discharged airflow 170 is reduced to a velocity of 1-2 m / s. Due to the 1-2 m / s velocity of the intake airflow 171 at the intake port 42, more than 50% of the discharged airflow 170 becomes the intake airflow 171. The temperature of the air drawn in at the intake port 42 is approximately 32°C, which is 17K higher than the room temperature of the entrance hall 17 (15°C). The air then passes through duct 70, blower 55, duct 71, branch pipe 60, ducts 72 and 73, and is discharged from outlets 50 and 52 at approximately 31°C at 175 m. 3 It is blown out as supply air at a rate of / h, heating the living room 20 and guest room 22, which are at a room temperature of approximately 15°C.

[0025] The cross-flow fan in the indoor unit 15 of the air conditioner is characterized by its high directional properties, which allows the airflow to reach far distances, while the sirocco fan in the blower 55 is characterized by its high static pressure resistance, which makes it easy to draw in air from a distance. Furthermore, since an undercut 86 for a door (not shown) is provided below the wall 175 opposite the wall 33 where the intake port 42 of the entrance hall 17 is installed, the return airflow from the living room 20 etc. that flows in through the undercut 86, when the air conditioner indoor unit 15 is stopped, is directed straight toward the intake port 42 as the dashed return airflow 176 due to the operation of the sirocco fan of the blower 55. When the air conditioner indoor unit 15 starts the heating operation described above, the discharge airflow 170 slows down, and as part of the airflow 177 rises away from the intake port 42 due to the density of the air, the dashed return airflow 176 becomes the solid return airflow 178, blocking the airflow 177, thereby maintaining the straightness of the discharge airflow 170 more, and most of it becomes the intake airflow 171.

[0026] Furthermore, a ventilation air supply vent 125 is installed in the ceiling of the entrance hall 17, near the wall 175 opposite the wall 33 where the intake vent 42 is installed, and the heat exchange unit 95 recovers the total heat from the indoor air and supplies 100 m³ of outside air. 3 Although the air is being blown out at / h, and all the heat has been recovered, the temperature is still lower than the room temperature at approximately 12°C. Therefore, the outside airflow 184 directed towards the intake port 42 and downwards collides with the rising return airflow 178 and the airflow 177 with low heating capacity that was not drawn into the intake port 42. As a result, the air is well mixed in the mixing unit 180, becoming fresh air with low CO2 and slightly higher than the room temperature at approximately 17°C. The entrance hall 17 becomes a comfortable space with uniform temperature and air quality. Subsequently, most of the air in the mixing unit 180 becomes the intake airflow 181 and discharge airflow 170 drawn into the intake port 142 of the indoor unit 15 of the air conditioner, while a portion becomes the intake airflow 185 and intake airflow 171 directed towards the intake port 42. In this way, the fresh air is also diffused into the living room 20 and guest room 22. Regarding air purification, some of the air from the intake airflow 171 flows into the air purification intake air passage 160 at the intake port 42, and the air purified by the air purification unit 40 merges with the air that flows directly into the air purification bypass intake air passage 165 to become clean supply air, which replaces the air in the living room 20 and guest room 22, and then returns to the entrance hall 17 as slightly polluted return air, where it is purified again. This process is repeated, maintaining a high level of air purity in the entrance hall 17, living room 20, and guest room 22. When the heat exchange unit 95 is in operation, some of the return air, which contains CO2 and humidity increased by people, is discharged as exhaust airflow 186 through the louver 135 installed between the toilet 100 and the entrance hall 17, thereby maintaining an even higher level of air purity in the entrance hall 17, living room 20, and guest room 22.

[0027] Furthermore, when heating is being operated in the entrance hall 17, and the living room 20 and guest room 22 are also to be heated, the process is basically the same as the priority heating operation for other rooms shown in Figure 5 above. However, since the entrance hall 17 is being heated, the room temperature is slightly higher at approximately 20°C. Therefore, to slightly reduce the heating in one room while increasing the heating in other rooms, the indoor unit 15 of the air conditioner is set to a higher temperature of 24°C using the remote control (not shown), the fan speed is set to medium, and heating operation is continued. Then, the angle of the airflow louvers 145 is set to adjust the angle of the discharged airflow 170 to "vertically downward (90°)", and the airflow volume of the blower 55 is set to high at 350m³. 3 When operated at / h, an intake airflow 171 is generated that is drawn into the intake port 42 located below the indoor unit 15 of the air conditioner. Based on the intake air temperature of 20°C detected by an intake air temperature sensor (not shown) from the intake port 142 of the indoor unit 15 of the air conditioner, the remote control set temperature of 24°C, and the set airflow rate, the inverter drive frequency of the compressor (not shown) of the outdoor unit (not shown) of the air conditioner is driven at a high frequency, controlling the electric expansion valve (not shown) and the outdoor blower (not shown), etc., to adjust the enthalpy and circulation amount of the refrigerant flowing into the heat exchanger (not shown) of the indoor unit 15 of the air conditioner, thereby increasing the heating capacity of the air conditioner on the first floor, and adjusting the temperature of the discharge airflow 170 of the indoor unit 15 of the air conditioner to a higher 40°C.

[0028] The airflow of 170 is approximately 7 m³ of the airflow during heating operation. 3 / min(420m 3 At 40°C (1 / h), the temperature is 40°C, so at the intake port 42, the discharge airflow 170 is reduced to a wind speed of 0.8-1.5 m / s. Due to the wind speed of the intake airflow 171 at intake port 42 (1-2 m / s), more than 70% of the discharge airflow 170 becomes the intake airflow 171. The temperature of the air drawn in at intake port 42 is approximately 36°C, which is 16K higher than the room temperature of the entrance hall 17 (20°C). From outlets 50 and 52, air of approximately 35°C is discharged at 175m each. 3 The air is blown out as supply air at a rate of / h, heating the living room 20 and guest room 22, which are at a room temperature of approximately 15°C, more strongly than when heating is prioritized for other rooms. The airflow of the discharge airflow 170 is medium, which is less than the high setting when heating is prioritized for other rooms. More than 70% of this becomes the intake airflow 171, and the amount of airflow 177 is small. As a result, the temperature in the entrance hall 17 does not rise above 20°C, only to about 22°C. The collision of airflow 177, return airflow 178, and outside airflow 184 promotes mixing, and the creation of a mixed area 180 with uniform temperature and air quality maintains a comfortable environment in the entrance hall 17.

[0029] Figure 6 shows the airflow in the entrance hall 17 when heating is prioritized for the room being heated. When the entrance hall 17 is in stable heating mode, and the living room 20 and guest room 22 can be left as they are, this is called priority heating mode for one's own room. However, since the entrance hall 17 is in stable heating mode, the room temperature is high at approximately 22°C. Therefore, to reduce heating in one's own room while weakening heating in other rooms, the indoor unit 15 of the air conditioner is set to a higher temperature of 24°C using the remote control (not shown), with the fan speed set to medium, and heating operation continues. Then, the angle of the airflow louvers 145 is set to adjust the angle of the discharged airflow 170 from "45° to 60° diagonally forward," and the airflow volume of the blower 55 is set to medium at 200m³. 3 Drive at / h Based on the intake air temperature of 22°C detected by an intake air temperature sensor (not shown) from the intake port 142 of the indoor unit 15 of the air conditioner, the remote control set temperature of 24°C, and the set airflow rate, the inverter drive frequency of the compressor (not shown) of the outdoor unit (not shown) of the air conditioner is driven at a low frequency, controlling the electric expansion valve (not shown) and the outdoor blower (not shown), etc., to adjust the enthalpy and circulation amount of the refrigerant flowing into the heat exchanger (not shown) of the indoor unit 15 of the air conditioner, thereby reducing the heating capacity exerted by the air conditioner on the first floor, and adjusting the temperature of the discharge airflow 170 of the indoor unit 15 of the air conditioner to a lower 25°C.

[0030] The airflow of 170 is approximately 7 m³ of the airflow during heating operation. 3 / min(420m 3 At a temperature of 25°C, the air is blown out at an angle of 45° to 60° diagonally forward, so it is not directly drawn into the intake port 42. Instead, mixing is promoted by the collision of the airflow 177, the return airflow 178, and the outside airflow 184, creating a mixed area 180 with uniform temperature and air quality below the entrance hall, thus maintaining a comfortable environment in the entrance hall 17. Then, the airflow 185 and 171 is drawn from the mixing unit 180 to the intake port 42, and the temperature of the air drawn in at the intake port 42 is set to approximately 23°C, which is 1K higher than the room temperature of the entrance hall 17 (22°C). Approximately 22°C air is then discharged from the outlets 50 and 52, respectively, at a rate of 100m. 3 By blowing in air at a rate of / h, the system gradually heats the living room 20 and guest room 22, which are at approximately 15°C, while simultaneously purifying the air and introducing outside air. As a result, the room temperature remains almost unchanged, while the air quality improves. Since the power consumption of the air conditioner and fan is kept low, energy-saving heating operation can be achieved. Furthermore, when only the entrance hall 17 is heated and the living room 20 and guest room 22 are not heated, the power consumption can be reduced by stopping the fan 55. However, this would prevent air purification and outside air intake in the living room 20 and guest room 22, so it is more desirable to operate the fan 55 intermittently, for example, every hour.

[0031] Figure 7 shows the airflow diagram in the entrance hall 17 when air conditioning is prioritized for other rooms. In summer, when the outside temperature is approximately 35°C, and the entrance hall 17, living room 20, and guest room 22 are not being cooled, and the desire is to cool the living room 20 and guest room 22 (where the indoor unit 15 of the air conditioner is not installed), but the entrance hall 17 does not need to be cooled, this is called cooling priority operation for other rooms. However, since the temperature in the entrance hall 17 is not being cooled, it is relatively high at approximately 30°C. The indoor unit 15 of the air conditioner is set to a low temperature of 25°C using the remote control (not shown), and the fan speed is set to medium to start cooling operation. Then, the angle of the airflow louvers 145 is set to adjust the angle of the discharged airflow 170 to "45° to 60° diagonally forward," and the airflow volume of the blower 55 is set to high at 350m³. 3 Drive at / h Based on the intake air temperature of 30°C detected by an intake air temperature sensor (not shown) from the intake port 142 of the indoor unit 15 of the air conditioner, the remote control set temperature of 25°C, and the set airflow rate, the inverter drive frequency of the compressor (not shown) of the outdoor unit (not shown) of the air conditioner is driven at a high frequency, controlling the electric expansion valve (not shown) and the outdoor blower (not shown), etc., to adjust the enthalpy and circulation amount of the refrigerant flowing into the heat exchanger (not shown) of the indoor unit 15 of the air conditioner, thereby increasing the cooling capacity of the air conditioner on the first floor, and adjusting the temperature of the discharge airflow 170 of the indoor unit 15 of the air conditioner to a relatively low 18°C.

[0032] The 170 airflow rate corresponds to approximately 7 m³ of the airflow during cooling operation. 3 / min(420m 3 At 18°C ​​(1 / h), the airflow 170 blows out diagonally forward at an angle of 45° to 60°, but as it moves away from the outlet 140, it becomes an airflow that descends vertically downward. 70% of the airflow becomes an intake airflow 171, which is drawn into the intake port 42. The temperature of the air drawn into the intake port 42 is set to approximately 20°C, which is 10K lower than the room temperature of the entrance hall 17 (30°C). From the outlets 50 and 52, air flows at approximately 21°C for 175m. 3 It is blown out as supply air at a rate of / h, cooling the living room 20 and guest room 22, which are at a room temperature of approximately 30°C.

[0033] Since an undercut 86 for a door (not shown) is provided below the wall 175 opposite the wall 33 where the intake port 42 of the entrance hall 17 is installed, the return airflow from the living room 20 etc. that flows in through the undercut 86, when the air conditioner indoor unit 15 is stopped, is directed straight toward the intake port 42 as the dashed return airflow 176 by the operation of the sirocco fan of the blower 55. When the air conditioner indoor unit 15 starts the above-mentioned cooling operation, the discharge airflow 170, due to the density of the air, partially moves away from the intake port 42 and descends as airflow 177, while the dashed return airflow 176 becomes the solid return airflow 178, blocking airflow 177. As a result, most of the discharge airflow 170 descends vertically from the outlet 140 and becomes the intake airflow 171 in the intake area 190 in front of the intake port 42. Furthermore, a ventilation air supply vent 125 is installed in the ceiling of the entrance hall 17, near wall 175 opposite wall 33 where the intake vent 42 is installed. The heat exchange unit 95 recovers the total heat from the indoor air, supplying approximately 32°C outdoor air for 100m³. 3 The downward-moving outside airflow collides with the rising return airflow 178 and the airflow 177 with low cooling capacity that was not drawn into the intake port 42, resulting in a well-mixed mixture in the mixing section 180. This creates fresh air with low CO2 content and a temperature slightly lower than room temperature, around 28°C. The entrance hall 17 becomes a comfortable space with uniform temperature and air quality. Subsequently, most of the air in the mixing section 180 becomes the intake airflow 181 and discharge airflow 170 drawn into the intake port 142 of the indoor unit 15 of the air conditioner, while a portion becomes the intake airflow 185 and intake airflow 171 directed towards the intake area 190. As a result, the fresh air is diffused into the living room 20 and guest room 22. The operation and effects of the air purification unit 40 and the heat exchange unit 95 are the same as during heating operation.

[0034] Furthermore, when you want to run the living room 20 and guest room 22 while the entrance hall 17 is running the air conditioning, the process is basically the same as the priority cooling operation for other rooms shown in Figure 7 above. However, since the entrance hall 17 is running the air conditioning, the room temperature is slightly lower at about 27°C. Therefore, to slightly reduce the cooling in your own room while increasing the cooling in the other rooms, set the indoor unit 15 of the air conditioner to a lower temperature of 23°C using the remote control (not shown), set the fan speed to medium, and continue the cooling operation. Then, set the angle of the airflow louvers 145 to adjust the angle of the discharged airflow 170 to "45° to 60° diagonally forward," and set the airflow volume of the fan 55 to high at 350m³. 3 Drive at / h The 27°C air drawn in from the intake port 142 of the indoor unit 15 of the air conditioner is detected by an intake air temperature sensor (not shown) at 27°C. Based on this intake air temperature of 27°C, the remote control set temperature of 22°C, and the set airflow rate (low), the inverter drive frequency of the compressor (not shown) of the outdoor unit (not shown) of the air conditioner is driven at a high frequency, controlling the electric expansion valve (not shown) and the outdoor blower (not shown), etc., to adjust the enthalpy and circulation amount of the refrigerant flowing into the heat exchanger (not shown) of the indoor unit 15 of the air conditioner, thereby increasing the cooling capacity of the air conditioner on the first floor, and adjusting the temperature of the discharged airflow 170 of the indoor unit 15 of the air conditioner to a relatively low 16°C.

[0035] The 170 airflow rate corresponds to approximately 7 m³ of the airflow during cooling operation. 3 / min(420m 3 At 16°C (1 / h), the airflow 170 blows out diagonally forward at an angle of 45° to 60°, but as it moves away from the outlet 140, it becomes a stronger downward vertical airflow, and 80% of the airflow becomes an intake airflow 171 drawn into the intake port 42, making the temperature of the air drawn in at the intake port 42 approximately 18°C, which is 9K lower than the room temperature of the entrance hall 17 (27°C). From the outlets 50 and 52, air at approximately 19°C flows for 175m each. 3 The air is blown out as supply air at a rate of / h, and the living room 20 and guest room 22, which are at a room temperature of approximately 30°C, are cooled more strongly than when the cooling is prioritized for other rooms. The airflow of the discharge airflow 170 is medium, the same as when prioritizing cooling for other rooms, but more than 80% of it becomes the intake airflow 171, and the amount of airflow 177 is less. As a result, the drop in the room temperature of the entrance hall 17 from 27°C is suppressed, and it only drops to about 25°C. The collision of airflow 177, return airflow 178, and outside airflow 184 promotes mixing, and the creation of a mixed area 180 with uniform temperature and air quality maintains a comfortable environment in the entrance hall 17.

[0036] Figure 8 shows the airflow diagram in the entrance hall 17 when air conditioning is prioritized for the user's own room. When the entrance hall 17 is running smoothly and the living room 20 and guest room 22 can be left as they are, this is called priority cooling for the room itself. However, since the entrance hall 17 is running smoothly and the room temperature is low at approximately 25°C, to reduce the cooling in the room itself while weakening the cooling in the other rooms, the indoor unit 15 of the air conditioner is set to a lower temperature of 23°C using the remote control (not shown), the fan speed is set to low, and the cooling operation continues. Then, the angle of the airflow louvers 145 is set to adjust the angle of the discharged airflow 170 to "horizontal (0°)", and the airflow volume of the fan 55 is set to medium at 200m³. 3 Drive at / h Based on the intake air temperature of 25°C detected by an intake air temperature sensor (not shown) from the intake port 142 of the indoor unit 15 of the air conditioner, the remote control set temperature of 23°C, and the set airflow volume (low), the inverter drive frequency of the compressor (not shown) of the outdoor unit (not shown) of the air conditioner is driven at a low frequency, controlling the electric expansion valve (not shown) and the outdoor blower (not shown), etc., to adjust the enthalpy and circulation amount of the refrigerant flowing into the heat exchanger (not shown) of the indoor unit 15 of the air conditioner, thereby reducing the cooling capacity exerted by the air conditioner on the first floor, and adjusting the temperature of the discharge airflow 170 of the indoor unit 15 of the air conditioner to a higher temperature of 22°C.

[0037] The 170 airflow setting corresponds to approximately 5m of the low fan speed during cooling operation. 3 / min(300m 3At a temperature of 22°C, the air is blown out horizontally at 0°, so it is not directly drawn into the intake port 42. Instead, mixing is promoted by the collision of the discharge airflow 170, the return airflows 176 and 178 with the outside airflow 184, creating a mixed area 180 with uniform temperature and air quality in the entrance hall, thus maintaining a comfortable environment in the entrance hall 17. Then, the airflow 185 and 171 is drawn from the mixing unit 180 to the intake port 42, and the temperature of the air drawn in at the intake port 42 is set to approximately 24°C, which is 1K lower than the room temperature of the entrance hall 17 (25°C), and approximately 25°C air is discharged from the outlets 50 and 52, respectively, at a rate of 100m. 3 By blowing in air at a rate of / h, the living room 20 and guest room 22, both at approximately 30°C, are cooled as needed. Simultaneously, air purification and outside air intake are performed, resulting in little change in room temperature while improving air quality. Power consumption of the air conditioner and fan is kept low, enabling energy-saving cooling operation. Furthermore, when only the entrance hall 17 is air-conditioned and the living room 20 and guest room 22 are not, the power consumption can be reduced by stopping the fan 55. However, this would prevent air purification and outside air intake in the living room 20 and guest room 22, so it is more desirable to operate the fan 55 intermittently, for example, every hour.

[0038] In this way, depending on individual preferences, rooms with air conditioners can be heated to a uniform temperature, and rooms without air conditioners can also be heated to a comfortable temperature. Furthermore, because the operation of air conditioners, fans, etc., is efficient, an air conditioning system with low power consumption is obtained. Furthermore, because there is a clear means of returning air from a room without air conditioning to a room with air conditioning, even with the door closed, the airflow from the fan remains stable, the temperature of the intake air from the air conditioner remains stable, and the temperature of the discharged air remains stable. As a result, the power consumption and noise of the fan do not increase, and an air conditioning system that reliably heats / cools the room is obtained. Furthermore, in addition to the aforementioned temperature control, air purification, such as dust removal, can be achieved simultaneously by operating a fan to supply air from the air-conditioned room to the room without an air conditioner, and circulating it through the return air path. This allows for air purification in both rooms and improves air quality. Furthermore, because the intake port is located at the bottom of the indoor unit of the air conditioner, it is easier to draw in dust that is concentrated at the bottom of the room. By directing the airflow from the indoor unit of the air conditioner downwards and slightly stirring up the dust, the suction efficiency of the intake port is also improved. Furthermore, since the air purification unit can be removed from the front of the air intake at the bottom of the indoor unit of the air conditioner, regular maintenance can be easily performed without the need for an inspection hatch or the use of a ladder.

[0039] In this embodiment, the rooms where the indoor air conditioner units are installed are the entrance hall 17 and the stairwell 18 because they are relatively small spaces, rooms where people are not constantly present, surrounded by other living spaces, and have a staircase connecting the first and second floors. In a relatively small space, there is more capacity to air condition other rooms; if the wall opposite the air conditioner is close, the airflow from the air conditioner hits the wall and is easily drawn into the intake, improving the air conditioning capacity of other rooms; in a room where people are not constantly present, the noise from the indoor air conditioner unit, the draft caused by the airflow, and the intake noise from the intake are less noticeable; if there are other living spaces around, the system can be made more efficient by using shorter ducts; and in a room with a staircase, the air from the first and second floors can easily convect and circulate, making it easier to achieve uniformity. However, by installing indoor air conditioners in rooms where people are always present and require frequent air conditioning, such as the living room (20) and children's rooms (23), it is possible to reduce the costs associated with air conditioning rooms that are not occupied. In such cases, it is particularly important to consider the size of the room where the air conditioner will be installed, the comfort level (noise and draft), the selection of the air conditioner and blower, and the relative positions of each piece of equipment. Specifically, to reduce noise, the intake opening should be made larger, the duct length should be kept to a minimum, sound-dampening ducts should be used, the blower should be one level larger in airflow capacity, the air conditioner should be one level larger in capacity, and the area where people are always present should be located away from the wall where the indoor air conditioner and intake are installed.

[0040] Furthermore, in this embodiment, ventilation air inlets 125 and 126 are provided in the ceilings of the entrance hall 17 and the stairwell 18 to blow outside air into the building 3. However, even though it is outside air that has undergone heat exchange, it will be slightly warm in the summer and slightly cold in the winter. Therefore, as mentioned above, if the room where the air conditioner is installed is a room such as the living room 20 or the children's room 23, where people are always present and the air conditioning is used for a long time, the draft will impair comfort. In such cases, it is desirable to install the ventilation air inlets in the return air passage, avoiding rooms where people are always present, for example, in a corridor. Alternatively, the supply air ducts B130 and B131, through which the heat-exchanged outdoor air passes, may be joined downstream of the blowers 55 and 56 and upstream of the outlets 50, 51, 52, and 53, and the conditioned supply air may be blown out from each outlet together. However, the system must be designed so that the outdoor air does not flow back when the blowers are stopped.

[0041] In this embodiment, air outlets are provided in the living room 20, bedroom 21, guest room 22, and children's room 23, giving the air conditioning system two air outlets. However, air outlets may also be provided in living spaces such as the office, washroom, toilet, bathroom, and kitchen, and in non-living spaces such as the entrance hall 17, stairwell 18, attic space 9, underfloor space 10, under the stairs, machine room, corridor, storage room, closet, and shoe cabinet. The air conditioning system may have one air outlet or three or more air outlets. In that case, the system design must be carefully considered in relation to the size and number of rooms, including the selection and number of air conditioners and blowers, duct diameter, number, length, intake opening area and number of units, return air opening area and number such as undercuts, and the positional relationship of air conditioners, intakes, return air openings, etc.

[0042] In this embodiment, the return air port 86 is an undercut of the door, but it may also be an exhaust grille, bypass duct, etc., and it is necessary to secure an opening area that corresponds to the return air volume. Furthermore, if it is not possible to secure the necessary opening area, or if the pressure loss in the return air passage is large and the return air volume is insufficient, the return air volume may be forcibly secured using a blower or ventilation fan. In this embodiment, the air outlets 50, 51, 52, and 53 are supply air grilles that blow out conditioned air, and the direction of the airflow can be changed. They are installed on the ceiling, but in order to equalize the temperature, it is preferable to install them at a distant position opposite to the return air outlet such as an undercut in the room. Depending on the blown air velocity, they may also be installed at a slightly lower position on the wall or floor.

[0043] In this embodiment, the blower 55 is installed in the space above the ceiling, and an inspection hatch is provided in the ceiling directly below the blower 55. The inspection hatch can be removed from the room side, allowing for maintenance and repair from the room side. However, if the duct is short and repair and maintenance are possible, it may be installed inside the wall or under the floor. In this embodiment, an intake port 42 is provided on the wall 33 below the indoor unit 15 of the air conditioner. However, below the outlet 140 of the indoor unit 15 of the air conditioner, the air outlet 170 may be located on the floor or elsewhere, as long as the airflow 170 is within reach of the intake airflow 171 of the intake port 42. Furthermore, it is not limited to just one location; two locations, such as the wall and the floor, may be provided to draw in air.

[0044] In this embodiment, the intake port 42 and the blower 55 are provided separately, but the blower 55 may also be installed as a single unit with the intake port 42, opening into a wall or the like. In that case, the intake area will be smaller, which may lead to increased noise such as the fan noise being directly audible, and the unit will become larger and difficult to install because the air purification unit 40 is housed inside. In this embodiment, outdoor air is blown directly from the heat exchange unit 95 to the entrance hall 17 through the ventilation air inlet 125. However, if the outdoor air after heat exchange is connected directly to the intake port 42 and purified by the air purification unit 40, and then circulated between rooms with the indoor air using the blower 55, the outdoor air is purified further before being introduced into the building 3, resulting in a healthier and safer air quality. However, it is necessary to consider that this may reduce the amount of indoor air intake, decrease the air conditioning capacity of the indoor air, and potentially cause reliability issues due to the outdoor air passing through the air purification unit.

[0045] (Embodiment 2) Figure 9 is a cross-sectional view of the suction port in Embodiment 2 of the present invention. This second embodiment differs from the first embodiment in its configuration, including the location and placement of the suction port, and the duct connection. As a result, its operation and effects are different. Below, only the differences will be described; the parts not described are basically the same as in the first embodiment.

[0046] As shown in the diagram, the intake ports 200 and 201 (intake port E) receive approximately 350 m³ of air, which is the airflow rate of blowers 55 and 56. 3 It consists of intake louvers 202 and 203 with external dimensions of 450 mm * 450 mm and a suitable intake area for drawing in / h, and main bodies 205 and 206, and has a pre-filter 210 and 211, air purification units 40 and 41, intake sections 212 and 213, power supply unit (not shown), air purification intake air passages 214 and 215, air purification sections 216 and 217, duct intake sections 220 and 221, dampers 222 and 223 that can adjust the airflow between the intake from duct intake sections 220 and 221 and the intake from intake sections 212 and 213, and duct connection sections 167 and 168 on the upper sides of the main bodies 205 and 206.

[0047] The dampers 222 and 223 are operated by electric motors and can stop at multiple angles, ranging from a state where the suction ports 212 and 213 are completely closed and the duct suction ports 220 and 221 are completely open, to a state where the suction ports 212 and 213 are completely open and the duct suction ports 220 and 221 are completely closed. This allows for adjustment of the airflow volume drawn in from the suction ports 212 and 213 and flowing into the air purification suction passages 214 and 215, as well as the airflow volume drawn in from the duct suction ports 220 and 221 and flowing into the air purification suction passages 214 and 215. The air purification units 40 and 41 are electrostatic precipitator filters that remove fine particles, particles with a diameter of 0.3 μm or larger, such as mold spores, dust, pollen, yellow sand, and PM2.5 from at least one of the air drawn in from the intake sections 212 and 213 and the air drawn in from the duct intake sections 220 and 221. The air is then discharged from the duct connection sections 167 and 168 through the ducts 70 and 76 to the blowers 55 and 56. The pre-filters 210 and 211 and air purification units 40 and 41 require regular cleaning and maintenance. Therefore, the intake louvers 202 and 203 of the intake ports 200 and 201, which are installed in a position higher than the indoor units 15 and 16 of the air conditioner (such as on the ceiling of the room), can be easily removed from the main units 205 and 206 using springs, etc. After that, the pre-filters 210 and 211 can be easily removed, and the air purification units 40 and 41 can be pulled downwards from the air purification sections 216 and 217 of the main units 205 and 206 by their handles. After maintenance, the units can be easily reassembled by reversing the process.

[0048] In this embodiment, electric dust collection type air purification units 40 and 41 are used, but a HEPA filter type that passes fine filter paper such as a HEPA filter (High Efficiency Particulate Air Filter) may also be used. The choice should depend on the type and degree of dust, bacteria, harmful substances to be removed, the airflow rate and speed of the air passing through, the frequency of maintenance such as cleaning, and the noise level. For example, if the target is viruses with a particle size of 0.1 μm or larger that can be captured by a HEPA filter, a HEPA filter type should be used.

[0049] Figure 10 shows the airflow in the entrance hall 17 when heating other rooms takes priority. The air conditioning system on the first floor (4) has an intake port 200 (intake port E) installed on the ceiling in front of the indoor air conditioner unit 15 in the entrance hall 17, above the left-right center of the indoor air conditioner unit 15, and an intake port 230 (intake port D) installed on the floor in front of the indoor air conditioner unit 15, above the left-right center of the indoor air conditioner unit 15. The suction port 230 is approximately 350m 3 It consists of a suction louver 231 and a main body 232 with external dimensions of 450mm*450mm, having a suitable suction area for drawing in / h, and has a pre-filter (not shown) inside, and a duct connection part (not shown) on the lower side of the main body 232. Furthermore, the duct connection part of the intake port 230 and the duct intake part 220 of the intake port 200 are connected by a duct 236 that runs under the floor, inside the wall 33, and through the space above the ceiling. Aside from these, it is the same as in Embodiment 1, and a similar air conditioning system is also provided on the second floor 5.

[0050] In winter, when the outside temperature is approximately 7°C, and the entrance hall 17, living room 20, and guest room 22 are not being heated, and the goal is to heat the living room 20 and guest room 22, where the indoor unit 15 of the air conditioner is not installed, but the entrance hall 17 does not need to be heated, this is called heating priority operation for other rooms. However, since the room temperature in the entrance hall 17 is not being heated, it is relatively low at approximately 15°C. The indoor unit 15 of the air conditioner is set to a higher temperature of 22°C using the remote control (not shown), and the fan speed is set to high to start heating operation. Then, the angle of the airflow louvers 145 is set to adjust the angle of the blown airflow 170 to the "horizontal direction (0°)". The damper 222 of the intake port 200 is activated, the intake sections 212 and 213 are fully opened, and the duct intake sections 220 and 221 are fully closed. The airflow rate of the blower 55 is set to the high setting of 350 m³. 3 Since it operates at / h, no air is drawn in at all from the suction port 230 installed on the floor, and 350m is drawn in from the suction port 200 installed on the ceiling. 3 / h Everything is sucked in. The air intake temperature of 15°C, drawn in from the intake port 142 of the indoor unit 15 of the air conditioner, is detected by an intake air temperature sensor (not shown). Based on this intake air temperature of 15°C, the remote control set temperature of 22°C, and the set airflow rate (high), the inverter drive frequency of the compressor (not shown) of the outdoor unit (not shown) of the air conditioner is driven at a high frequency, controlling the electric expansion valve (not shown) and the outdoor blower (not shown), etc., to adjust the enthalpy and circulation amount of the refrigerant flowing into the heat exchanger (not shown) of the indoor unit 15 of the air conditioner, thereby increasing the heating capacity of the air conditioner on the first floor, and adjusting the temperature of the discharged airflow 170 of the indoor unit 15 of the air conditioner to a higher 35°C.

[0051] The 170 airflow setting corresponds to approximately 10 m / s of the high fan speed during heating operation. 3 / min(600m 3At 35°C per hour, the airflow 170 is blown horizontally from the air outlet 140 of the indoor unit 15 of the air conditioner. Due to the density of the air, it rises, and at the location of the installed intake port 200, the airflow 170 is reduced to a wind speed of 1-2 m / s. The wind speed of the intake airflow 171 at the intake port 200 is 1-2 m / s, so more than 70% of the airflow 170 becomes the intake airflow 171. The temperature of the air drawn in at the intake port 200 is approximately 34°C, which is 19K higher than the room temperature of the entrance hall 17 (15°C). The air then passes through duct 70, blower 55, duct 71, branch pipe 60, ducts 72 and 73, and is blown out from outlets 50 and 52 at approximately 33°C for 175 m 3 It is blown out as supply air at a rate of / h, strongly heating the living room 20 and guest room 22, which are at a room temperature of approximately 15°C. Although little air is not drawn into the intake port 200 by the discharge airflow 170, the collision of the return airflow 178 and the outside airflow 184 promotes mixing, and with only a temperature increase to about 17°C, a uniform temperature and air quality mixture area 180 is created in the entrance hall, and the entrance hall 17 maintains the conditions it was in before operation.

[0052] Figure 11 shows the airflow in the entrance hall 17 when both rooms are heated. When heating is running in the entrance hall 17, and you also want to heat the living room 20 and guest room 22, the room temperature in the entrance hall 17 is slightly higher at about 20°C because it is being heated. Therefore, to increase the heating in the other rooms while slightly reducing the heating in your own room, set the indoor unit of the air conditioner 15 to a higher temperature of 24°C using the remote control (not shown), set the fan speed to medium, and continue heating. Then, set the angle of the airflow louvers 145 to adjust the angle of the blown airflow 170 to "45° to 60° diagonally forward". The damper 222 of the intake port 200 is activated, the intake sections 212 and 213 are fully opened, and the duct intake sections 220 and 221 are fully closed. The airflow rate of the blower 55 is set to the high setting of 350 m³. 3 Since it operates at / h, no air is drawn in at all from the suction port 230 installed on the floor, and 350m is drawn in from the suction port 200 installed on the ceiling. 3 / h Everything is sucked in. Based on the intake air temperature of 20°C detected by an intake air temperature sensor (not shown) from the intake port 142 of the indoor unit 15 of the air conditioner, the remote control set temperature of 24°C, and the set airflow rate, the inverter drive frequency of the compressor (not shown) of the outdoor unit (not shown) of the air conditioner is driven at a high frequency, controlling the electric expansion valve (not shown) and the outdoor blower (not shown), etc., to adjust the enthalpy and circulation amount of the refrigerant flowing into the heat exchanger (not shown) of the indoor unit 15 of the air conditioner, thereby increasing the heating capacity of the air conditioner on the first floor, and adjusting the temperature of the discharge airflow 170 of the indoor unit 15 of the air conditioner to a higher 40°C.

[0053] The airflow of 170 is approximately 7 m³ of the airflow during heating operation. 3 / min(420m 3 At 40°C per hour, the airflow from the air outlet 140 of the indoor unit 15 of the air conditioner becomes an outflow 170 that blows out diagonally forward at an angle of 45° to 60°C. Subsequently, due to the density of the air, it rises, and more than 80% of the outflow 170 becomes an intake airflow 171. The temperature of the air drawn in at the intake port 200 is approximately 38°C, which is 18K higher than the room temperature of 20°C in the entrance hall 17 (+10K or more). Approximately 37°C of air is then drawn in from outlets 50 and 52 at 175m² each. 3 The air is blown out as supply air at a rate of / h, heating the living room 20 and guest room 22, which are at a room temperature of approximately 15°C, more strongly than when heating is prioritized for other rooms. Although little air is not drawn into the intake port 200 by the discharge airflow 170, the collision of the return airflow 178 and the outside airflow 184 promotes mixing, warming the temperature to about 22°C. A mixed area 180 with uniform temperature and air quality is generated below the entrance hall as the discharge airflow 170 is blown out diagonally forward at an angle of 45° to 60°, making the entrance hall 17 a more comfortable space.

[0054] Figure 12 shows the airflow in the entrance hall 17 when heating is prioritized for the room being heated. When the entrance hall 17 is operating stably with heating, and the living room 20 and guest room 22 can be left as they are, this is called priority heating operation for one's own room. However, since the entrance hall 17 is operating stably with heating, the room temperature is high at approximately 22°C. Therefore, in order to reduce heating in one's own room while weakening heating in other rooms, it is basically operated with the same settings as when heating both rooms as described above, and the indoor unit of the air conditioner 15 is set to a higher temperature of 24°C using the remote control (not shown). The damper 222 of the intake port 200 is moved to an angle of approximately 45°, and the intake section 212 and the duct intake section 220 are both opened halfway, and the airflow rate of the blower 55 is set to 200m³. 3 Since it operates at / h, the air intake from the ceiling-mounted 200 is approximately 100m 3 / h is sucked in, and approximately 100m from the suction port 230 installed on the floor. 3 As air is drawn in, an intake airflow 171 is generated that draws in the rising outlet airflow 170, which is affected by the density of the air, from the intake port 230, thereby reducing the temperature difference between the upper and lower parts of the entrance hall 17 and making it more comfortable. Then, the temperature in the entrance hall 17 was set to approximately 23°C, which is 1K higher than the room temperature of 22°C, and approximately 22°C of air was supplied from outlets 50 and 52, respectively, over 100m. 3 By blowing in air at a rate of / h, the system gradually heats the living room 20 and guest room 22, which are at approximately 15°C, while simultaneously purifying the air and introducing outside air. As a result, the room temperature remains almost unchanged, while the air quality improves. Since the power consumption of the air conditioner and fan is kept low, energy-saving heating operation can be achieved.

[0055] Figure 13 shows the airflow diagram in the entrance hall 17 when air conditioning is prioritized for other rooms. In summer, when the outside temperature is approximately 35°C, and the entrance hall 17, living room 20, and guest room 22 are not being cooled, and the goal is to cool the living room 20 and guest room 22, where the indoor unit 15 of the air conditioner is not installed, but the entrance hall 17 does not need to be cooled, this is called prioritizing cooling for other rooms. However, since the room temperature in the entrance hall 17 is not being cooled, it is relatively high at approximately 30°C. The indoor unit 15 of the air conditioner is set to a lower temperature of 25°C using the remote control (not shown), and the fan speed is set to medium to start cooling. Then, the angle of the airflow louvers 145 is set to adjust the angle of the blown airflow 170 to "45° to 60° diagonally forward". The damper 222 of the intake port 200 is activated, the intake section 212 is completely closed, the duct intake section 220 is completely open, and the airflow rate of the blower 55 is set to the high setting of 350 m³. 3 Since it operates at / h, the suction from the floor-mounted intake port 230 is 350m 3 / h Everything is sucked in. Based on the intake air temperature of 30°C detected by an intake air temperature sensor (not shown) from the intake port 142 of the indoor unit 15 of the air conditioner, the remote control set temperature of 25°C, and the set airflow rate, the inverter drive frequency of the compressor (not shown) of the outdoor unit (not shown) of the air conditioner is driven at a high frequency, controlling the electric expansion valve (not shown) and the outdoor blower (not shown), etc., to adjust the enthalpy and circulation amount of the refrigerant flowing into the heat exchanger (not shown) of the indoor unit 15 of the air conditioner, thereby increasing the cooling capacity of the air conditioner on the first floor, and adjusting the temperature of the discharge airflow 170 of the indoor unit 15 of the air conditioner to a relatively low 18°C.

[0056] The 170 airflow rate corresponds to approximately 7 m³ of the airflow during cooling operation. 3 / min(420m 3 At 18°C ​​per hour, the outlet airflow 170 blows out at an angle of 45° to 60° diagonally forward. Taking into account the effect of air density, 80% of the outlet airflow becomes an intake airflow 171 drawn into the intake port 230. The temperature of the air drawn into the intake port 230 is set to approximately 19°C, which is 11K lower than the room temperature of the entrance hall 17 (30°C). Approximately 20°C of air is drawn in from outlets 50 and 52 at 175m³ each. 3 It is blown out as supply air at a rate of / h, providing stronger cooling for the living room 20 and guest room 22, which are at a room temperature of approximately 30°C. Since most of the outflow air (170°C) is drawn into the intake (230°C), the temperature in the entrance hall (17°C) only drops slightly, allowing for more efficient cooling of the living room (20°C) and guest room (22°C).

[0057] Figure 14 shows the airflow diagram in the entrance hall 17 when both rooms are air-conditioned. When you want to run the living room 20 and guest room 22 with the air conditioning on while the entrance hall 17 is running, the process is basically the same as the priority cooling operation for other rooms shown in Figure 13 above. However, since the entrance hall 17 is running with the air conditioning on, the room temperature is slightly lower at about 27°C. Therefore, to increase the cooling in the other rooms while slightly reducing the cooling in your own room, set the indoor unit of the air conditioner 15 to a lower temperature of 23°C using the remote control (not shown), set the fan speed to medium, and continue the cooling operation. Then, set the angle of the airflow louvers 145 to adjust the angle of the blown airflow 170 to "30° to 45° diagonally forward". The damper 222 of the intake port 200 is activated, the intake section 212 is completely closed, the duct intake section 220 is completely open, and the airflow rate of the blower 55 is set to the high setting of 350 m³. 3 Since it operates at / h, the suction from the floor-mounted intake port 230 is 350m 3 / h Everything is sucked in. The 27°C air drawn in from the intake port 142 of the indoor unit 15 of the air conditioner is detected by an intake air temperature sensor (not shown) at 27°C. Based on this intake air temperature of 27°C, the remote control set temperature of 22°C, and the set airflow rate (low), the inverter drive frequency of the compressor (not shown) of the outdoor unit (not shown) of the air conditioner is driven at a high frequency, controlling the electric expansion valve (not shown) and the outdoor blower (not shown), etc., to adjust the enthalpy and circulation amount of the refrigerant flowing into the heat exchanger (not shown) of the indoor unit 15 of the air conditioner, thereby increasing the cooling capacity of the air conditioner on the first floor, and adjusting the temperature of the discharged airflow 170 of the indoor unit 15 of the air conditioner to a relatively low 16°C.

[0058] The 170 airflow rate corresponds to approximately 7 m³ of the airflow during cooling operation. 3 / min(420m 3 At 16°C (1 / h), the airflow 170 blows out diagonally forward at an angle of 30° to 45°, but as it moves away from the outlet 140, the airflow 170 becomes a stronger vertical downward flow, and 80% of the airflow becomes an intake airflow 171 drawn into the intake port 230, so the temperature of the air drawn in at the intake port 230 is approximately 17°C, which is 10K lower than the room temperature of the entrance hall 17 (27°C), and approximately 18°C ​​of air is drawn in from the outlets 50 and 52 at 175m. 3The air is blown out as supply air at a rate of / h, and the living room 20 and guest room 22, which are at a room temperature of approximately 30°C, are cooled more strongly than when the cooling is prioritized for other rooms. The airflow of the discharge airflow 170 is medium, the same as when prioritizing cooling for other rooms, but more than 80% of it becomes the intake airflow 171, which suppresses the drop in the room temperature of the entrance hall 17 from 27°C, bringing it down to around 25°C. Mixing is promoted by the collision of the discharge airflow 170, the return airflow 178, and the outside airflow 184, and because the discharge angle of the discharge airflow 170 is high, from 30° to 45°, a mixed area 180 with uniform air quality and less temperature difference between the upper and lower parts is created, resulting in a comfortable environment in the entrance hall 17.

[0059] Figure 15 shows the airflow in the entrance hall 17 when air conditioning is prioritized for the user's own room. When the entrance hall 17 is running smoothly with cooling, and the living room 20 and guest room 22 can be left as they are, this is called priority cooling operation for the room itself. However, since the entrance hall 17 is running smoothly with cooling, the room temperature is low at approximately 25°C. Therefore, in order to reduce the cooling in the other rooms while keeping the cooling in the room itself low, the system is basically operated with the same settings as when cooling both rooms as described above, and the indoor unit 15 of the air conditioner is set to a lower temperature of 23°C using the remote control (not shown). The damper 222 of the intake port 200 is moved to an angle of approximately 45°, and the intake section 212 and the duct intake section 220 are both opened halfway, and the airflow rate of the blower 55 is set to 200m³. 3 Since it operates at / h, the air intake from the ceiling-mounted 200 is approximately 100m 3 / h is sucked in, and approximately 100m from the suction port 230 installed on the floor. 3 As air is drawn in at / h, an intake airflow 240 is generated that draws in the downward-sloping outlet airflow 170 from the intake port 200, reducing the temperature difference between the upper and lower parts of the entrance hall 17 and making it more comfortable. Then, the temperature in the entrance hall 17 is set to approximately 24°C, which is 1K lower than the room temperature of 25°C, and approximately 25°C is supplied to 100m from outlets 50 and 52. 3 By blowing in air at a rate of / h, the system cools the living room 20 and guest room 22, which are at approximately 30°C, while simultaneously purifying the air and introducing outside air. As a result, the room temperature remains almost unchanged, while the air quality improves. Since the power consumption of the air conditioner and fan is kept low, energy-saving heating operation can be achieved.

[0060] In this way, the temperature can be adjusted according to individual preferences in both rooms with and without air conditioning, and the temperature difference between the upper and lower parts of a room with air conditioning can be reduced, making it more comfortable. In particular, by utilizing the rising airflow due to increased air density during heating, the operation of the air conditioner and fan becomes more efficient, resulting in an air conditioning system with lower power consumption. Furthermore, because there is a clear means of returning air from a room without air conditioning to a room with air conditioning, even with the door closed, the airflow from the fan remains stable, the temperature of the intake air from the air conditioner remains stable, and the temperature of the discharged air remains stable. As a result, the power consumption and noise of the fan do not increase, and an air conditioning system that reliably heats / cools the room is obtained. Furthermore, in addition to the aforementioned temperature control, air purification, such as dust removal, can be achieved simultaneously by operating a fan to supply air from the air-conditioned room to the room without an air conditioner, and circulating it through the return air path. This allows for air purification in both rooms and improves air quality. Furthermore, because the intake ports are located on the ceiling and floor of the room, it is easier to draw in dust that is concentrated in the lower part of the room or dust that has been blown around. By changing the airflow of the indoor unit of the air conditioner to slightly stir up the dust, the suction efficiency of the intake ports is also improved. Furthermore, since the air purification unit can be removed from below the ceiling of the room, regular maintenance can be easily performed without the need to install an inspection hatch.

[0061] In this embodiment, the suction ports 230 and 200 are connected in series to the blower 55, and a damper is provided at the suction port 200 to adjust the airflow at the suction port. However, in order to increase the suction area, reduce pressure loss, increase the suction airflow, and reduce noise, the two suction ports may be connected in parallel to the blower 55, and dampers may be provided to adjust the suction airflow at each port.

[0062] (Embodiment 3) Figure 16 is a cross-sectional view of a building showing the configuration of the air conditioning system in Embodiment 3 of the present invention. This third embodiment differs from the first embodiment in the location of the intake port, the specifications of the blower, the outdoor air intake path, the branch pipe, the duct connection, and other configurations. As a result, the operation and effects are different. Below, only the differences will be explained, and the parts not explained are basically the same as in the first embodiment.

[0063] As shown in the diagram, the air conditioning systems 301 and 302 are installed one system each on the first floor 4 and second floor 5 of a two-story building 3, which is a highly airtight and highly insulated house, and provide air conditioning and ventilation to the rooms and other areas within the building 3. In the configuration of this air conditioning system 201, 202, intake ports 305, 306 (intake port F) containing air purification units 40, 41 are installed in the entrance hall 17 and stairwell 18, on the ceiling within 1 meter in front of the indoor air conditioning units 15, 16, and above the center in the left-right direction of the indoor air conditioning units 15, 16. Air outlets 50, 51, 52, 53 are installed in the ceilings 44, 45, 46, and 47 of the living room 20, bedroom 21, guest room 22, and children's room 23 (space B), respectively. To draw in air at intake ports 305 and 306 and blow it out at outlet ports 50, 51, 52, and 53, blowers 355 and 356 and branch pipes 360 and 361 are installed in the ceiling spaces 62 and 63, ducts 70, 71, 72, and 73 are passed through the ceiling space 62, and ducts 76, 77, 78, and 79 are passed through the ceiling space 63. Intake port 305, blower 355, branch pipe 360, and outlet ports 50 and 52 are connected airtightly by ducts 70, 71, 72, and 73, and intake port 306, blower 356, branch pipe 361, and outlet ports 51 and 53 are connected airtightly by ducts 76, 77, 78, and 79. Furthermore, heat exchange units 95 and 96 are provided in the ceiling spaces 62 and 63, respectively, and the heat exchange units 95 and 96 are connected to the branch pipes 360 and 361 by the supply air ducts B330 and 331, respectively, while maintaining airtightness.

[0064] The other outdoor air intake and indoor air exhaust passages are the same as in Embodiment 1. The configuration of branch pipes 360 and 361 will be described later, but in branch pipes 360 and 361, the air drawn in by blowers 355 and 356 at the intake ports 305 and 306 is mixed with the outdoor air that has undergone heat exchange by heat exchange units 95 and 96, and this mixed air is blown out from outlets 50, 51, 52, and 53. The basic configuration of blowers 355 and 356 is the same as that of blowers 55 and 56 in Embodiment 1, but the maximum airflow (high notch) is increased to 350 m³ by increasing the motor speed and enlarging the external dimensions of the housing, fan, etc. 3 500m from / h 3 It's being increased to / h. The intake ports 305 and 306 (intake port F) are the same as the intake ports 42 and 43 (intake port C) in Embodiment 1, but while they were installed on the wall in Embodiment 1, they are installed on the ceiling in this embodiment, and the maximum airflow rate of blowers 355 and 356 is approximately 500 m³. 3 To draw in air at / h, if the noise level is high, the intake area of ​​the intake louvers 150 and 151 may be increased, or the ratio of airflow directly into the air purification bypass intake passages 165 and 166 may be increased.

[0065] The other air intake and return air passages are the same as in Embodiment 1. Then, the supply air passage and the return air passage on the first floor are connected, and on the first floor 4, the supply air, which is conditioned air mixed with the air blown out from the indoor unit 15 of the air conditioner in the entrance hall 17 and the air in the entrance hall 17, is drawn in from the intake port 305, passes through duct 70, blower 355, and duct 71, flows into branch pipe 360, mixes with the outside air that has undergone heat exchange by the heat exchange unit 95, and this mixed air passes through ducts 72 and 73 and is blown out from the outlet 50 in the living room 20 and the outlet 52 in the guest room 22, respectively. The conditioned return air passes through return air outlets 85 and 86 and returns to the entrance hall 17, forming a first-floor circulating air passage (not shown). The supply air passage and return air passage on the second floor are connected, and on the second floor 5, the supply air, which is conditioned air mixed with the air blown out from the indoor unit 16 of the air conditioner in the stairwell 18 and the air in the stairwell 18, is drawn in from the intake port 43, passes through duct 76, blower 356, and duct 77, flows into branch pipe 361, mixes with the outdoor air that has undergone heat exchange by the heat exchange unit 96, and this mixed air passes through ducts 78 and 79 and is blown out from the outlet 51 of the bedroom 21 and the outlet 53 of the children's room 23, respectively. The conditioned return air passes through return air outlets 87 and 88 and returns to the stairwell 18, forming a second-floor circulating air passage (not shown).

[0066] In this embodiment, ventilation exhaust ports 102 and 103 are provided in the toilets 100 and 101. However, ventilation exhaust ports and grilles may also be provided in other rooms or spaces that tend to generate and accumulate odors, moisture, harmful substances, etc., such as washrooms, bathrooms, and kitchens—so-called "dirty zones." In such cases, these can be discharged directly to the outside without passing through other rooms or spaces. However, if the heat exchange elements 110 and 111 of the heat exchange units 95 and 96 are not resistant to deterioration from moisture in bathrooms, oil in kitchens, etc., then a separate ventilation fan will need to be provided. Furthermore, ventilation exhaust vents 102 and 103 may be installed in rooms downstream of the circulation path (return air path), such as the entrance hall 17 and the stairwell 18. In this case, some of the indoor air from the room will be discharged outside along with dust and moisture generated by normal daily life in that room. However, to prevent moisture from the dirty zone from flowing into the room, it is necessary to install ventilation exhaust vents or another ventilation fan in the dirty zone.

[0067] In the above configuration, when heating, cooling, air purification, outside air intake, and indoor air exhaust are performed for the entrance hall 17, living room 20, and guest room 22 on the first floor (4), and for the stairwell 18, bedroom 21, and children's room 23 on the second floor (5), the operating status of each device and the airflow will be explained using the entrance hall 17 on the first floor (4) as a representative example, but the explanation for the stairwell 18 on the second floor (5) will be similar.

[0068] Figure 17 shows the airflow diagram in the entrance hall 17 when air conditioning is prioritized for other rooms. In summer, when the outside temperature is approximately 35°C, and the entrance hall 17, living room 20, and guest room 22 are not being cooled, and the desire is to cool the living room 20 and guest room 22 (where the indoor unit 15 of the air conditioner is not installed), but the entrance hall 17 does not need to be cooled, this is called cooling priority operation for other rooms. However, since the temperature in the entrance hall 17 is not being cooled, it is relatively high at approximately 30°C. The indoor unit 15 of the air conditioner is set to a low temperature of 25°C using the remote control (not shown), and the fan speed is set to low to start cooling operation. Then, the angle of the airflow louvers 145 is set to adjust the angle of the discharged airflow 170 to "horizontal direction (0°)", and the airflow volume of the blower 355 is set to the maximum of 500m³. 3 Drive at / h The air intake temperature of 30°C, detected by an intake air temperature sensor (not shown) from the intake port 142 of the indoor unit 15 of the air conditioner, is set to 25°C on the remote control and the set airflow is set to low. Based on this intake air temperature of 30°C, the compressor (not shown) of the outdoor unit (not shown) of the air conditioner is driven at a high frequency, controlling the electric expansion valve (not shown) and the outdoor fan (not shown), etc., to adjust the enthalpy and circulation amount of the refrigerant flowing into the heat exchanger (not shown) of the indoor unit 15 of the air conditioner, thereby increasing the cooling capacity of the air conditioner on the first floor, and adjusting the temperature of the discharged airflow 170 of the indoor unit 15 of the air conditioner to a relatively low 16°C.

[0069] The temperature of the 170°C outlet airflow is 16°C, and due to the density of the air, it tends to become a downward airflow, but at the low fan speed during cooling operation, it is approximately 5m 3 / min(300m 3Because of this, at the location of the intake port 305 installed on the ceiling within approximately 1m from the front of the indoor unit 15, on the left-right center of the indoor unit 15, the discharge airflow 170 is reduced to a wind speed of 1m / s or less, and the airflow of the blower 355 at the same location is 500m³. 3 Compared to the 1.5-2 m / s wind speed of the intake airflow at the intake port 305 due to / h, the wind speed is slower and the wind pressure is lower, so more than 70% of the discharge airflow 170 becomes the rising intake airflow 171 and is drawn into the intake port 305. Furthermore, the heat exchange unit 95 has a strong notch ventilation airflow of 150 m³. 3 The unit operates at / h, mixing the conditioned air with the heat-exchanged outdoor air from the heat exchange unit 95 via a branch pipe 360. This mixed air is then blown out from the outlet 50 in the living room 20 and the outlet 52 in the guest room 22. The conditioned return air passes through the return air vents 85 and 86 and returns to the entrance hall 17 as a return airflow 378. The airflow of the return airflow 378 is 500 m³. 3 / h+Ventilation air volume 150m 3 650m per hour 3 At / h, the entrance hall 17 becomes positively pressurized, and the air pressure of the return airflow towards the intake port 305 increases. Furthermore, the return airflow consists of air that has been conditioned and the outside air that has undergone heat exchange, and since it is slightly warmer than the room temperature in the entrance hall 17, it becomes an upward airflow and heads towards the intake port 305.

[0070] The intake airflow 171 is drawn in by the aforementioned return airflow 378, and together with the return airflow 378, a larger amount of intake airflow is directly drawn into the intake port 305. The temperature of the air drawn in at the intake port 305 is set to approximately 22°C, which is 8K lower than the room temperature of 30°C in the entrance hall 17, and approximately 23°C of air is discharged from the outlets 50 and 52, respectively, over a distance of 250m. 3 The air is blown out as supply air at a rate of / h to cool the living room 20 and guest room 22, which are at a room temperature of approximately 30°C. A portion of the blown airflow 170 that is not directly drawn in is mixed with the return airflow 378 etc. in the mixing section 180, and the majority of it is drawn into the intake port 142 of the indoor unit 15 of the air conditioner as the intake airflow 181. Regarding air purification, some of the air from the intake airflow 171 flows into the air purification intake air passage 160 at the intake port 305. The air purified by the air purification unit 40 then merges with the air that flows directly into the air purification bypass intake air passage 165, becoming clean supply air. This clean air replaces the air in the living room 20 and guest room 22, and as slightly polluted return air, it returns to the entrance hall 17, where it is purified again. This process is repeated, maintaining a high level of air purity in the entrance hall 17, living room 20, and guest room 22. When the heat exchange unit 95 is operated, the heat-exchanged outside air is mixed with the conditioned air drawn in at the intake port 305 from the blower 355 via the branch pipe 360, and blown into the room, supplying fresh outside air and conditioned the room. The returned air, which contains CO2 and humidity increased by the people, returns to the entrance hall 17 through the return air port 86, and a portion of the air in the entrance hall 17 is discharged as exhaust airflow 186 through the louver 135 installed between the toilet 100 and the entrance hall 17, further maintaining high air quality in the entrance hall 17, living room 20, and guest room 22.

[0071] Furthermore, when you want to cool the living room 20 and guest room 22 while the entrance hall 17 is being cooled, the room temperature in the entrance hall 17 is slightly lower at approximately 27°C. Therefore, to increase the cooling in the other rooms while slightly reducing the cooling in your own room, the process is basically the same as the priority cooling operation for other rooms shown in Figure 17 above. However, the indoor unit 15 of the air conditioner is set to a lower temperature of 23°C using the remote control (not shown), the fan speed is set to low, and cooling operation is continued. Then, the angle of the airflow louvers 145 is set to adjust the angle of the discharged airflow 170 to "horizontal direction (0°)", and the airflow volume of the blower 355 is set to the maximum of 500m³. 3 Drive at / h The 27°C air drawn in from the intake port 142 of the indoor unit 15 of the air conditioner is detected by an intake air temperature sensor (not shown) at 27°C. Based on this intake air temperature of 27°C, the remote control set temperature of 23°C, and the set airflow rate (low), the inverter drive frequency of the compressor (not shown) of the outdoor unit (not shown) of the air conditioner is driven at a high frequency, controlling the electric expansion valve (not shown) and the outdoor blower (not shown), etc., to adjust the enthalpy and circulation amount of the refrigerant flowing into the heat exchanger (not shown) of the indoor unit 15 of the air conditioner, thereby increasing the cooling capacity of the air conditioner on the first floor, and adjusting the temperature of the discharged airflow 170 of the indoor unit 15 of the air conditioner to a relatively low 14°C. The difference from the operation prioritizing cooling of other rooms is that, due to the lower set temperature of 23°C, the discharge temperature is lower at 14°C, and a portion of the discharge airflow 170 becomes a downward airflow, cooling the entrance hall 17. More than 50% of the discharge airflow 170 becomes an upward airflow, the intake airflow 171, which is drawn into the intake port 305, resulting in a temperature of approximately 20°C, 7K lower than the room temperature of 27°C in the entrance hall 17. From the outlets 50 and 52, the temperature is approximately 21°C each, and it flows 250m 3 It is blown out as supply air at a rate of / h, cooling the living room 20 and guest room 22, which are at a room temperature of approximately 30°C.

[0072] Figure 18 shows the airflow diagram in the entrance hall 17 when prioritizing cooling for the owner's room. When the entrance hall 17 is running smoothly and the living room 20 and guest room 22 can be left to their own devices, this is called prioritizing cooling for the owner's room. However, since the entrance hall 17 is running smoothly and the room temperature is low at approximately 25°C, to reduce cooling in the owner's room while weakening the cooling in other rooms, the indoor unit 15 of the air conditioner is set to a lower temperature of 23°C using the remote control (not shown), with the fan speed set to medium, and the cooling operation continues. Then, the angle of the airflow louvers 145 is set to adjust the angle of the discharged airflow 170 from "45° to 60° diagonally forward," and the airflow volume of the blower 355 is set to medium at 200m³. 3 Drive at / h The suction air temperature of 25°C sucked in from the suction port 142 of the air conditioner indoor unit 15 is detected by a suction air temperature sensor (not shown). Based on the suction air temperature of 25°C, the remote control set temperature of 23°C, and the set air volume, the inverter drive frequency of the compressor (not shown) of the air conditioner outdoor unit (not shown) is driven at a low frequency. The electric expansion valve (not shown), the outdoor blower (not shown), etc. are controlled to adjust the enthalpy and circulation volume of the refrigerant flowing into the heat exchanger (not shown) of the air conditioner indoor unit 15, and to control the air conditioner on the first floor to reduce the cooling capacity it exhibits, and to adjust the temperature of the blown air flow 170 of the air conditioner indoor unit 15 to 24°C, which is higher.

[0073] The blown air flow 170 is about 7 m in the air volume during the cooling operation 3 / min (420 m 3 / h). From the air outlet 140 of the air conditioner indoor unit 15, 1 m in front, the wind speed becomes about 1.5 m / s, and it blows out at an angle of 45° to 60° in the front diagonal direction. Therefore, on the center in the left - right direction of the air conditioner indoor unit 15, from the position of the suction port 305 installed on the ceiling within about 1 m in front of the air conditioner indoor unit 15, the blown air flow 170 passes below, more than 1.5 m away. Also, since the air volume of the blower 355 is as low as 200 m 3 / h, the wind speed of the suction air flow of the suction port 305 is less than or equal to 1 m / s, and the blown air flow 170 is not directly sucked into the suction port 305. Also, the heat exchange unit 95 operates with a ventilation air volume of 100 m 3 / h for 24 hours, mixes the air - conditioned air and the outdoor air heat - exchanged by the heat exchange unit 95 with a branch pipe 360, and the mixed air blows out from the air outlet 50 of the living room 20 and the air outlet 52 of the guest room 22 respectively. Since the return air after air - conditioning returns to the entrance hall 17 as the return air flow 378 through the return air ports 85 and 86, the air volume of the return air flow 378 is the air supply volume of 200 m 3 / h + the ventilation air volume of 100 m 3 / h, which is 300 m 3The result is / h. The return airflow consists of the air after air conditioning and the outside air after heat exchange, and since it is slightly warmer than the room temperature in the entrance hall 17, it becomes an upward airflow and heads towards the intake port 305. However, the airflow volume of the return airflow 378 is small, and the point where it merges with the discharge airflow 170 is far from the intake port 305, so the discharge airflow 170 is not drawn into the intake port 305.

[0074] The mixing of the discharge airflow 170 and the return airflow 378 is promoted by their merging, creating a mixed area 180 in the entrance hall with uniform temperature and air quality, thus maintaining a comfortable environment in the entrance hall 17. Then, the airflow 185 is drawn from the mixing unit 180 to the intake port 305. The temperature of the air drawn in at the intake port 305 is set to approximately 25°C (zero K) relative to the room temperature of the entrance hall 17 (25°C), and approximately 26°C air is drawn out at 100m from the outlets 50 and 52, respectively. 3 By blowing in air at a rate of / h, the living room 20 and guest room 22, both at approximately 30°C, are cooled as needed. Simultaneously, air purification and outside air intake are performed, resulting in little change in room temperature while improving air quality. Power consumption of the air conditioner and fan is kept low, enabling energy-saving cooling operation. Furthermore, if only the entrance hall 17 is cooled and the living room 20 and guest room 22 are not cooled, the power consumption can be reduced by stopping the fan 355. However, this would prevent air purification in the living room 20 and guest room 22, as well as the introduction of outside air. Therefore, it is more desirable to operate the fan 355 intermittently, for example, every hour. In that case, care must be taken as there is a possibility that air from the heat exchange unit 95 may flow back into the fan 355 side through the branch pipe 360.

[0075] Figure 19 shows the airflow diagram in the entrance hall 17 when heating other rooms takes priority. In winter, when the outside temperature is approximately 7°C, and the entrance hall 17, living room 20, and guest room 22 are not being heated, and the goal is to heat the living room 20 and guest room 22 (where the indoor unit 15 of the air conditioner is not installed), but the entrance hall 17 does not need to be heated, this is called "prioritizing heating to other rooms." However, since the room temperature in the entrance hall 17 is not being heated, it is relatively low at approximately 15°C. Therefore, the indoor unit 15 of the air conditioner is set to a higher temperature of 22°C using the remote control (not shown), with the fan speed set to medium, and heating operation is started. Then, the angle of the airflow louvers 145 is set to adjust the angle of the discharged airflow 170 to "horizontal (0°)," and the airflow volume of the blower 355 is set to 350 m³. 3 Drive at / h Based on the intake air temperature of 15°C detected by an intake air temperature sensor (not shown) from the intake port 142 of the indoor unit 15 of the air conditioner, the remote control set temperature of 22°C, and the set airflow rate, the inverter drive frequency of the compressor (not shown) of the outdoor unit (not shown) of the air conditioner is driven at a high frequency, controlling the electric expansion valve (not shown) and the outdoor blower (not shown), etc., to adjust the enthalpy and circulation amount of the refrigerant flowing into the heat exchanger (not shown) of the indoor unit 15 of the air conditioner, thereby increasing the heating capacity of the air conditioner on the first floor, and adjusting the temperature of the discharge airflow 170 of the indoor unit 15 of the air conditioner to a higher 37°C.

[0076] The airflow of 170 is approximately 7 m³ of the airflow during heating operation. 3 / min(420m 3 At 37°C per hour, the air is blown horizontally from the air outlet 140 of the indoor unit 15 of the air conditioner, but rises due to the density of the air and heads towards the installed intake port 305. At the location of the intake port 305, the discharge airflow 170 is reduced to a wind speed of 1-1.5 m / s, and the wind speed of the intake airflow 171 from the intake port 200 is approximately 1.5 m / s, so more than 70% of the discharge airflow 170 becomes the intake airflow 171, and the temperature of the air drawn in at the intake port 200 is approximately 36°C, which is 21K higher than the room temperature of 15°C in the entrance hall 17. The air then passes through duct 70, blower 355, duct 71, branch pipe 360, ducts 72 and 73, and is discharged from the air outlets 50 and 52 at approximately 35°C for 175 m 3 It is blown out as supply air at a rate of / h, strongly heating the living room 20 and guest room 22, which are at a room temperature of approximately 15°C. Also, the heat exchange unit 95 operates with a ventilation air volume of 100 m 3 / h for 24 hours, mixes the air - conditioned air and the outdoor air heat - exchanged by the heat exchange unit 95 with a branch pipe 360, and the mixed air blows out from the air outlet 50 of the living room 20 and the air outlet 52 of the guest room 22 respectively. The return air after air - conditioning passes through the return air openings 85 and 86 and returns to the entrance hall 17 as a return air flow 378. Therefore, the air volume of the return air flow 378 is the sum of the air supply volume 350 m 3 / h + the ventilation air volume 100 m 3 / h, which is 450 m 3 / h, and heads towards the suction port 305. However, the return air flow 378 is the air - conditioned air and the outdoor air after heat - exchange, and is slightly lower than the room temperature of the entrance hall 17. Therefore, it does not rise due to the air density. Before merging with the blown - out air flow 170, in the mixing section 180, a part of the blown - out air flow 170 and the air in the entrance hall 17 are mixed, making the temperature and air quality uniform. The entrance hall 17 does not have a relatively large temperature rise, and the situation before operation is easily maintained.

[0077] Figure 20 is a flow diagram of the air flow in the entrance hall 17 during the heating operation of both rooms. When the living room 20 and the guest room 22 also need to be heated during the heating operation of the entrance hall 17, since the entrance hall 17 is in the heating state and the room temperature is slightly high at about 20 °C, in order to slightly suppress the heating of one's own room and strengthen the heating of the other room, the air - conditioner indoor unit 15 is set with a remote control (not shown) to a set temperature of 24 °C, which is set higher, the air volume is strong, and the heating operation continues. Then, the angle of the air - direction louver 145 is set to adjust the angle of the blown - out air flow 170 to "45° to 60° obliquely forward", and the air supply volume of the blower 355 is set to 350 m 3 / h for operation. Based on the intake air temperature of 20°C detected by an intake air temperature sensor (not shown) from the intake port 142 of the indoor unit 15 of the air conditioner, the remote control set temperature of 24°C, and the set airflow rate (high), the inverter drive frequency of the compressor (not shown) of the outdoor unit (not shown) of the air conditioner is driven at a high frequency, controlling the electric expansion valve (not shown) and the outdoor blower (not shown), etc., to adjust the enthalpy and circulation amount of the refrigerant flowing into the heat exchanger (not shown) of the indoor unit 15 of the air conditioner, thereby increasing the heating capacity of the air conditioner on the first floor, and adjusting the temperature of the discharge airflow 170 of the indoor unit 15 of the air conditioner to a higher 38°C.

[0078] The 170 airflow setting corresponds to approximately 10 m / s of the high fan speed during heating operation. 3 / min(600m 3 At 175m³, the airflow from the air outlet 140 of the indoor unit 15 of the air conditioner becomes an outflow 170 that blows out diagonally forward at an angle of 45° to 60°. However, because the temperature is 38°C, which is considerably higher than the room temperature of the entrance hall 17, the air density rises rapidly, and more than 70% of the outflow 170 becomes an intake airflow 185. The temperature of the air drawn in at the intake port 305 is approximately 36°C, which is 16K higher than the room temperature of the entrance hall 17 (20°C). From the outlets 50 and 52, air flows out at approximately 35°C at 175m³ each. 3 The air is blown out as supply air at a rate of / h, heating the living room 20 and guest room 22, which are at a room temperature of approximately 15°C, more strongly than when heating is prioritized for other rooms. Furthermore, the heat exchange unit 95 has a 24-hour ventilation airflow of 100 m³. 3 The unit operates at / h, mixing the conditioned air with the heat-exchanged outdoor air from the heat exchange unit 95 via a branch pipe 360. This mixed air is then blown out from the outlet 50 in the living room 20 and the outlet 52 in the guest room 22. The conditioned return air passes through the return air vents 85 and 86 and returns to the entrance hall 17 as a return airflow 378. The airflow of the return airflow 378 is 350 m³. 3 / h+Ventilation air volume 100m 3 450m per hour 3The airflow becomes / h and heads towards the intake port 305, but the return airflow 378 is the outside air after heat exchange with the air that has been conditioned, and since it is lower than the room temperature in the entrance hall 17, it does not rise due to air density. However, because the direction of the discharge airflow 170 is diagonally forward at 45° to 60°, near the center of the entrance hall 17, it mixes with the air in the entrance hall 17 as a mixing section 180, making the temperature and air quality uniform, and the entrance hall 17 is heated to approach the set temperature of 24°C.

[0079] Furthermore, when the entrance hall 17 is in stable heating mode and the living room 20 and guest room 22 can be left as they are, this is called priority heating mode for one's own room. However, since the entrance hall 17 is in stable heating mode, the room temperature is high at approximately 22°C. Therefore, in order to reduce heating in one's own room while weakening heating in other rooms, it is basically operated with the same settings as when heating both rooms as described above, with the indoor unit 15 of the air conditioner set to a higher temperature of 24°C using the remote control (not shown), and the airflow rate of the fan 355 set to 200 m³. 3 Drive at / h Based on the intake air temperature of 22°C detected by an intake air temperature sensor (not shown) from the intake port 142 of the indoor unit 15 of the air conditioner, the remote control set temperature of 24°C, and the set airflow rate (high), the inverter drive frequency of the compressor (not shown) of the outdoor unit (not shown) of the air conditioner is driven at a low frequency, controlling the electric expansion valve (not shown) and the outdoor blower (not shown), etc., to adjust the enthalpy and circulation amount of the refrigerant flowing into the heat exchanger (not shown) of the indoor unit 15 of the air conditioner, thereby reducing the heating capacity exerted by the air conditioner on the first floor, and adjusting the temperature of the discharged airflow 170 of the indoor unit 15 of the air conditioner to a lower 25°C.

[0080] The 170 airflow setting corresponds to approximately 10 m / s of the high fan speed during heating operation. 3 / min(600m 3At 200m / h, the airflow velocity is approximately 2m / s at 1m in front of the air outlet 140 of the indoor unit 15 of the air conditioner, and it blows out at an angle of 45° to 60° diagonally forward. Therefore, the discharge airflow 170 passes more than 1.5m below the intake port 305, which is located on the ceiling within approximately 1m from the front of the indoor unit 15, above the center of the indoor unit 15 in the left-right direction. The temperature of the discharge airflow 170 is 25℃, which is only slightly higher than the room temperature of the entrance hall 17 (22℃), and the airflow of the blower 355 is 200m 3 Because the value is low at / h, the wind speed of the intake airflow at the intake port 305 is less than 1 m / s, and the discharge airflow 170 is not directly drawn into the intake port 305. Furthermore, the heat exchange unit 95 has a 24-hour ventilation airflow of 100 m³. 3 The unit operates at / h, mixing the conditioned air with the heat-exchanged outdoor air from the heat exchange unit 95 via a branch pipe 360. This mixed air is then blown out from the outlet 50 in the living room 20 and the outlet 52 in the guest room 22. The conditioned return air passes through the return air vents 85 and 86 and returns to the entrance hall 17 as a return airflow 378. The airflow of the return airflow 378 is 200 m³. 3 / h+Ventilation air volume 100m 3 300m at / h 3 At / h, the air flows towards the intake port 305, but the return airflow 378 consists of air that has been conditioned and the outside air that has undergone heat exchange. Since it is lower than the room temperature in the entrance hall 17, it does not rise due to air density.

[0081] However, because the direction of the discharged airflow 170 is at an angle of 45° to 60° diagonally forward, a portion of the discharged airflow 170 mixes with the air in the entrance hall 17 at a mixing point 180 near the center of the entrance hall 17, resulting in uniform temperature and air quality, and the entrance hall 17 is heated to approach the set temperature of 24°C. Then, the airflow 185 is drawn from the mixing unit 180 to the intake port 305, and the temperature of the air drawn in at the intake port 305 is set to approximately 23°C, which is 1K higher than the room temperature of the entrance hall 17 (22°C). Approximately 22°C air is then discharged from the outlets 50 and 52, each at a temperature of 100m. 3By blowing in air at a rate of / h, the system gradually heats the living room 20 and guest room 22, which are at approximately 15°C, while simultaneously purifying the air and introducing outside air. As a result, the room temperature remains almost unchanged, while the air quality improves. Since the power consumption of the air conditioner and fan is kept low, energy-saving heating operation can be achieved. Furthermore, when heating is only operated in the entrance hall 17 and the living room 20 and guest room 22 are not heated, the power consumption can be further reduced by stopping the fan 355. However, since air purification and outside air intake in the living room 20 and guest room 22 will not be possible, it is more desirable to operate the fan 355 intermittently, for example, every hour. In that case, caution is necessary because there is a possibility that air from the heat exchange unit 95 may flow back into the fan 355 side through the branch pipe 360.

[0082] Figure 21 is an outline view of the branch pipes 360 and 361 of Embodiment 3. Branch pipes 360 and 361 are designed to merge and mix air from two ducts and evenly distribute it to up to four ducts. They consist of an airtight metal enclosure with insulation material attached to the inside. Ducts 71 and 77 from blowers 355 and 356 are connected to blower adapters 310 and 320, supply air ducts B330 and 331 from heat exchange units 95 and 96 are connected to heat exchange unit adapters 311 and 321, and ducts 72, 73, 78, and 79 connected to outlets 50, 51, 52, and 53 are connected to discharge adapters 316, 318, 326, and 328, all while maintaining airtightness. Discharge adapters 315, 325, 317, and 327, to which no ducts are connected, are covered with insulated lids to maintain airtightness. The air blown from the blowers 355 and 356 and the outside air after heat exchange from the heat exchange units 95 and 96 are mixed in the space inside the branch pipes 360 and 361, and in the mixing section 340 and 341, which is the space immediately after the air flows into the branch pipes 360 and 361 from the blower adapters 310 and 320 and the heat exchange unit adapters 311 and 321, the conditioned air from the entrance hall 17 and stairwell 18 where the air conditioners 15 and 16 are installed is mixed with the fresh outside air to make the air quality uniform. Possible methods include increasing the volume and cross-sectional area of ​​the mixing sections 340 and 341 so that the airflow velocity of the incoming air is slowed to 0.5 m / s or less, or creating a collision between the two airflows by installing a resistance such as a wall downstream of the mixing sections 340 and 341. However, these methods may result in problems such as excessively large external dimensions making installation difficult, increased costs, and excessive resistance reducing the overall airflow. In any case, the specifications must be determined by balancing the purpose, effects, and challenges.

[0083] The mixed air of conditioned air and outside air, which has been made uniform in the mixing sections 340 and 341, flows into branching sections 342 and 343, which are downstream of the mixing sections 340 and 341 and upstream of the discharge adapters 315, 316, 317, 318, 325, 326, 327, and 328. The air is then distributed evenly in terms of airflow to the discharge adapters 316 and 318, to which ducts are connected, and similarly distributed evenly in terms of airflow to the discharge adapters 326 and 328, to which ducts are connected. Possible methods include, for example, increasing the volume and cross-sectional area of ​​branch sections 342 and 343 so that the airflow velocity is slowed to 0.3 m / s or less, or installing a resistance such as a wall at the inlet of the outlet adapters 315, 316, 317, 318, 325, 326, 327, and 328 to equalize the ventilation resistance due to their shape, etc. However, these methods may result in problems such as excessively large external dimensions making installation difficult, increased costs, and excessive resistance reducing the overall airflow. In any case, the specifications must be determined by balancing the purpose, effect, and challenges. The number and diameter of the ducts to be merged, and the number and diameter of the ducts to be branched, can be changed according to the configuration and specifications of the air conditioning systems 301 and 302. The configuration, external shape, and specifications of the branch pipes 360 and 361 should be determined so that the conditioned air can be branched evenly with as little change as possible in terms of temperature and airflow, and the outside air and other air quality in terms of air quality and airflow.

[0084] Furthermore, while there is no problem if the blowers 355 and 356 and heat exchange units 95 and 96 are operated continuously for 24 hours, if any of them are stopped even temporarily, there is a possibility that air may flow back into the duct connected to the stopped product from the duct of the operating product. To prevent this, it is necessary to install backflow prevention shutters between the blower adapters 310 and 320, the heat exchange unit adapters 311 and 321 and the mixing section 340 and 341, or to install a resistance such as a wall between the blower adapters 310 and 320 and the heat exchange unit adapters 311 and 321 within the mixing section 340 and 341. However, caution is necessary because the shutters may not operate smoothly, causing leaks or abnormal noises, and the ventilation resistance may increase due to the shutters or walls, potentially reducing the overall airflow.

[0085] Thus, in this embodiment, since the air intake is installed in the ceiling of the room where the air conditioner is installed, the air intake is not conspicuous in terms of the room's design, resulting in a clean look. Furthermore, while there is often little depth to install air intakes and ducts in walls, the ceiling has ample depth as a space above the ceiling, providing ample space for installing air intakes and ducts, thus offering excellent ease of installation. Normally, during cooling, the airflow from an air conditioner tends to become a downward airflow due to the density of the air, and if the intake is on the ceiling, it is difficult to draw in a large amount of the airflow. However, in this embodiment, the intake is placed directly in front of the air conditioner, the direction of the airflow is made horizontal, the wind speed is lowered, the wind speed of the fan is increased, and the amount of heat-exchanged outside air introduced is increased. By supplying the heat-exchanged outside air to each room, the amount of return airflow to the room where the air conditioner is installed is made to be the amount of airflow from the fan plus the ventilation airflow. The wind speed of the return airflow to the intake is increased, and the temperature of the return airflow is made slightly higher than the room temperature to create an upward airflow. As a result, the return airflow can draw in the airflow from the outlet, making it possible to draw in a large amount of airflow from the outlet even during cooling.

[0086] Furthermore, compared to Embodiment 1, the airflow of the blower and heat exchange unit is increased, which slightly increases their power consumption. However, the power consumption is still lower than that of an air conditioner, and an air conditioning system is obtained that can regulate the temperature of rooms without air conditioners without unnecessarily overcooling or heating the rooms where air conditioners are installed, thus providing a comfortable environment. Furthermore, in addition to the aforementioned temperature control, the air purification system has the same effects and benefits for the entire building as in Embodiment 1. Moreover, because the fresh outside air after heat exchange is mixed with the conditioned air and supplied directly to each room, it is possible to reliably and quickly improve the air quality in each room by reducing CO2 and odors.

[0087] (Embodiment 4) Figure 22 is a cross-sectional view showing the configuration of the heat exchange unit in Embodiment 4 of the present invention. This fourth embodiment differs from the third embodiment in the configuration of the heat exchange unit. Below, only the differences will be described, and the parts that are not described are basically the same as in the third embodiment.

[0088] In the ceiling of toilet 100 within building 3, a ventilation vent 102, such as an exhaust grille, is provided to exhaust the air from inside toilet 100, and is connected to a heat exchange unit 495. An outdoor exhaust hood 105 is installed in a penetration hole in the exterior wall of building 3, and is connected to a heat exchange unit 495 by an exhaust duct 107. The heat exchange unit 495 includes an introduction fan (not shown) for introducing outdoor air, an exhaust fan (not shown) for exhausting indoor air, a motor (not shown), a heat exchange element 110 for recovering the total heat from the indoor air into the outdoor air, a heat exchanger 450 for heating and cooling the outdoor air that has passed through the heat exchange element, and a heat exchange fan (not shown). The heat exchanger 450 has multiple aluminum fins tightly attached around a copper or aluminum tube, and by passing a refrigerant or liquid inside the copper or aluminum tube, it transfers heat from the refrigerant or liquid to the air passing through the aluminum fins. The heat exchange unit 495 and the outdoor unit 430 are connected by refrigerant piping and electrical wiring 432. The control device (not shown) of the outdoor unit 430 controls the compressor (not shown), outdoor fan (not shown), and expansion valve (not shown) according to the operating mode and outdoor temperature, etc., to supply refrigerant to the heat exchanger 450.

[0089] The outdoor air that has passed through the heat exchange element and heat exchanger flows into the branch section 342 via the supply air duct B330. As a result, the indoor air is exhausted through the ventilation exhaust port 102, the heat is recovered by the heat exchange element 110 of the heat exchange unit 495, and then exhausted outside through the exhaust duct 107 and the outdoor exhaust hood 105. In addition, outdoor air is introduced from the outdoor air supply hood 115, passes through the air supply duct A117, is purified in the filter box 120, recovers all heat in the heat exchange element 110 of the heat exchange unit 495, and depending on the operating mode, is heated, cooled, and dehumidified in the heat exchanger 450, passes through the air supply duct B330, is mixed with the conditioned air from the blower 355 at the branching section 342 to become mixed conditioned air, which is then blown out from the outlets 50 and 52 to the living room 20 and guest room 22.

[0090] In summer, when the outside temperature is high, the total heat exchange rate of the heat exchange element is approximately 70%, so even if total heat is exchanged with the indoor air, the temperature will be higher than the room temperature. Furthermore, if the room temperature stabilizes higher than the set temperature due to a large solar load and insufficient cooling capacity of the air conditioner 15, the heat exchanger 450 can be used as an evaporator, and the two-phase low-pressure refrigerant from the outdoor unit 430 can be used to further cool the outdoor air after heat exchange, lowering it below the room temperature and compensating for the insufficient capacity, thus making it more comfortable. In winter, when the outdoor temperature is low, the total heat exchange rate of the heat exchange element is approximately 70%. Therefore, even if total heat is exchanged with the indoor air, the temperature will be lower than the room temperature. Furthermore, if the room temperature remains below the set temperature due to insufficient cooling capacity of the air conditioner 15, such as due to snowfall, the heat exchanger 450 can be used as a condenser, and the high-pressure refrigerant from the outdoor unit 430 can be used to further heat the outdoor air after heat exchange, raising it above the room temperature and compensating for the insufficient capacity, thus making it more comfortable. During the rainy season, when outdoor and indoor humidity are high, and even after total heat exchange with indoor air, humidity may remain high. In cases where there are many occupants or a lot of moisture is generated inside the building due to bathing, etc., the heat exchanger 450 can be used as both an evaporator and a condenser. The high-pressure refrigerant from the outdoor unit 430 cools and dehumidifies the outdoor air after heat exchange, and then reheats it. By introducing this lowered-absolute-humidity outdoor air into the building, a more refreshing and comfortable environment can be achieved. During transitional seasons, when the outdoor temperature and humidity are appropriate, or when the air conditioning capacity of the air conditioner 15 is sufficient and the room temperature and indoor humidity are comfortable, comfortable outdoor air can be supplied to the building solely through the total heat exchange of the heat exchange element 110, without circulating refrigerant through the heat exchanger 450. This allows for energy savings, improved air quality, and the maintenance of appropriate room temperature, indoor humidity, etc., thus maintaining comfort.

[0091] In this embodiment, the heat exchange unit 495 has a 24-hour ventilation airflow of 100 m³. 3 / h, strong notch ventilation airflow 150m 3 With a total heat exchange rate of approximately 70% per hour, and being suitable for one floor of building 3 in this embodiment, installing heat exchange units 495 on the first floor 4 and the second floor 5 respectively improves the overall comfort of building 3. In this embodiment, in order to save energy, a refrigerant is circulated through the heat exchanger 450, so-called heat pump heating and cooling is performed. However, it may be more rational to use existing equipment, and depending on the region and housing environment, heating and cooling may be performed by circulating hot water from water heaters or hot water panels, which have lower running costs, or chilled water from underground cooling or chillers. Thus, in this embodiment, by changing the state of the refrigerant flowing through the heat exchanger using a heat pump according to the season, it is possible to maintain a more comfortable temperature and humidity inside the building in an energy-efficient manner without the need to install additional air conditioners or dehumidifiers.

[0092] (Embodiment 5) Figure 23 shows the configuration of the air conditioning system in Embodiment 5 of the present invention, and is an airflow diagram of the entrance hall 17, etc., when cooling other rooms is prioritized. This embodiment 5 differs from embodiment 3 in the relative positional relationship between the intake port and the air conditioner, resulting in different operation and effects. Below, only the differences will be explained; the parts not explained are basically the same as embodiment 3.

[0093] The air conditioning system 401 is installed on both the first floor 4 and the second floor 5 of a two-story building 3, which is a highly airtight and highly insulated house. One system is installed on each floor, providing air conditioning and ventilation to the rooms and other areas within the building 3. The first floor 4 will be described in detail as an embodiment of the system. In this air conditioning system 401, in the entrance hall 17, a ceiling chamber 404 is provided on the wall 33 side of the ceiling 403, extending towards the ceiling space 62, and the indoor air conditioner unit 15 is installed on the wall 33, partially inside the ceiling chamber 404. An intake port 405 (intake port G) is installed on the ceiling 403 1m to 1.5m in front of the indoor air conditioner unit 15, at a height equal to or less than the height of the air outlet 140 of the indoor air conditioner unit 15, and above the center in the left-right direction of the indoor air conditioner unit 15. The ceiling room 404 is part of the entrance hall 17, is a rectangular prism with an open side facing the ceiling 403, is made of the same material as the ceiling 403, and is surrounded by an insulated ceiling space 62. By providing space of 250 mm or more above the intake port 142 of the air conditioner indoor unit 15, 500 mm or more in front of the air conditioner indoor unit 15, and 300 mm or more on each of the left and right sides of the air conditioner indoor unit 15, the intake air flows smoothly into the intake port 142 and is large enough for maintenance.

[0094] In the above configuration, during the summer when the outside temperature is approximately 35°C, if the entrance hall 17, living room 20, and guest room 22 are not being cooled, and the desire is to cool the living room 20 and guest room 22 (where the indoor unit 15 of the air conditioner is not installed), but the entrance hall 17 does not need to be cooled, this is called cooling priority operation for other rooms. However, since the room temperature in the entrance hall 17 is not being cooled, it is relatively high at approximately 30°C. The indoor unit 15 of the air conditioner is set to a low temperature of 25°C using the remote control (not shown), and the fan speed is set to low to start cooling operation. Then, the angle of the airflow louvers 145 is set to adjust the angle of the discharged airflow 170 to "horizontal direction (0°)", and the airflow volume of the blower 355 is set to the maximum of 500m³. 3Drive at / h The air intake temperature of 30°C, detected by an intake air temperature sensor (not shown) from the intake port 142 of the indoor unit 15 of the air conditioner, is set to 25°C on the remote control and the set airflow is set to low. Based on this intake air temperature of 30°C, the compressor (not shown) of the outdoor unit (not shown) of the air conditioner is driven at a high frequency, controlling the electric expansion valve (not shown) and the outdoor fan (not shown), etc., to adjust the enthalpy and circulation amount of the refrigerant flowing into the heat exchanger (not shown) of the indoor unit 15 of the air conditioner, thereby increasing the cooling capacity of the air conditioner on the first floor, and adjusting the temperature of the discharged airflow 170 of the indoor unit 15 of the air conditioner to a relatively low 16°C.

[0095] The temperature of the discharge airflow 170 is 16℃, and due to the density of the air, it tends to become a downward airflow. However, since the intake port 405 is installed on the ceiling 403 1m to 1.5m in front of the indoor unit 15 of the air conditioner, above the center in the left-right direction of the indoor unit 15, at a height equal to or lower than the height of the air outlet 140 of the indoor unit 15, even if it is a downward airflow, the discharge airflow 170 tends to be drawn into the intake port 405 as an intake airflow 171. Also, the fan speed is set to low when the air conditioner is running, and it reaches approximately 5m. 3 / min(300m 3 Because of this, at the location of the intake port 405, the discharge airflow 170 is reduced to a wind speed of 1 m / s or less, and the airflow of the blower 355 at the same location is 500 m³. 3 Compared to the 1.5-2 m / s wind speed of the intake airflow at the intake port 405 due to / h, the wind speed is slower and the wind pressure is lower, so more than 70% of the discharge airflow 170 becomes the rising intake airflow 171 and is drawn into the intake port 405. Furthermore, the heat exchange unit 95 has a strong notch ventilation airflow of 150 m³. 3 The unit operates at / h, mixing the conditioned air with the heat-exchanged outdoor air from the heat exchange unit 95 via a branch pipe 360. This mixed air is then blown out from the outlet 50 in the living room 20 and the outlet 52 in the guest room 22. The conditioned return air passes through the return air vents 85 and 86 and returns to the entrance hall 17 as a return airflow 378. The airflow of the return airflow 378 is 500 m³. 3 / h+Ventilation air volume 150m 3 650m per hour 3At / h, the entrance hall 17 becomes positively pressurized, and the air pressure of the return airflow towards the intake port 305 increases. Furthermore, the return airflow consists of air that has been conditioned and the outside air that has undergone heat exchange, and since it is slightly warmer than the room temperature in the entrance hall 17, it becomes an upward airflow and heads towards the intake port 305.

[0096] The intake airflow 171 is drawn in by the aforementioned return airflow 378, and together with the return airflow 378, a larger intake airflow is directly drawn into the intake port 405. The temperature of the air drawn in at the intake port 405 is set to approximately 22°C, which is 8K lower than the room temperature of 30°C in the entrance hall 17, and approximately 23°C of air is discharged from the outlets 50 and 52, respectively, over a distance of 250m. 3 The air is blown out as supply air at a rate of / h to cool the living room 20 and guest room 22, which are at a room temperature of approximately 30°C. A portion of the blown airflow 170 that is not directly drawn in is mixed with the return airflow 378 etc. in the mixing section 180, and the majority of it becomes the intake airflow 181, passing through the space between the indoor air conditioner unit 15 and the ceiling room 404 and being drawn into the intake port 142 of the indoor air conditioner unit 15. Furthermore, if the airflow of the heat exchange unit 95 is reduced or stopped, or if the outdoor air that has undergone heat exchange by the heat exchange unit 95 is not blown out from the air outlet 50 in the living room 20 and the air outlet 52 in the guest room 22, the ventilation airflow will be 150 m³. 3 Even if / h is not added to the return airflow 378, the relative positional relationship between the air outlet 140 and the intake port 405 of the indoor unit 15 of the air conditioner means that the effect of the discharge airflow 170 being easily drawn into the intake port 405 as the intake airflow 171 remains unchanged.

[0097] Furthermore, for operation in both rooms with cooling, prioritizing the user's own room with cooling, prioritizing other rooms with heating, operating both rooms with heating, and prioritizing the user's own room with heating, the environment suitable for the purpose of each operation can be achieved by setting the temperature, airflow, angle of the airflow louvers 145, airflow volume, etc., as in Embodiment 3. Regarding the relative positional relationship between the air outlet 140 and the intake port 405 of the indoor air conditioner unit 15, if the intake air flows smoothly into the intake port 142 of the indoor air conditioner unit 15, and the blown airflow 170 reaches the intake port 405, depending on the shape of the ceiling chamber 404, the positional relationship between the ceiling chamber 404 and the indoor air conditioner unit 15, and the positional relationship between the ceiling chamber 404 and the intake port 405, then the operation and effects of this embodiment can be obtained and the objective can be achieved. For example, if the intake port 405 is considerably lower than the air outlet 140 of the indoor air conditioner unit 15, it is a disadvantageous situation for raising only the temperature of other rooms when prioritizing heating other rooms, but this is acceptable if the intake air flows smoothly into the intake port 142 of the indoor air conditioner unit 15 and the blown airflow 170 reaches the intake port 405.

[0098] Figure 24 shows another configuration of the air conditioning system in Embodiment 5 of the present invention, and is an airflow diagram of the entrance hall 17, etc., when cooling other rooms is prioritized. The air conditioning system 411 is installed on both the first floor 4 and the second floor 5 of a two-story building 3, which is a highly airtight and highly insulated house. One system is installed on each floor, providing air conditioning and ventilation to the rooms and other areas within the building 3. The first floor 4 will be described in detail as an embodiment.

[0099] In the configuration of this air conditioning system 411, in the entrance hall 17, a ceiling chamber 414 is provided on the wall 33 side of the ceiling 403, extending towards the ceiling space 62, and the indoor unit of the air conditioner 15 is installed on the wall 33, completely inside the ceiling chamber 404. On the side wall 412 of the ceiling chamber 414, 2m in front of the indoor unit of the air conditioner 15, the intake port 415 (intake port G) of the blower 455 is installed facing the indoor unit of the air conditioner 15, at the center of the indoor unit of the air conditioner 15 in the left-right direction, and at a height equal to or less than the height of the air outlet 140 of the indoor unit of the air conditioner 15. Inside the blower 455 are a DC motor (brushless DC motor) (not shown) and a sirocco fan (not shown), which are more energy-efficient than AC motors and allow for stepless control of the rotation speed over a wider range. When the airflow is set using a switch (not shown), the sirocco fan rotates to draw air in from the intake port 415. The drawn-in air flows through the duct 71, etc., and is blown out from the outlet 50 in the living room 20 and the outlet 52 in the guest room 22. The ceiling room 414 is part of the entrance hall 17, is a rectangular prism with an open side facing the ceiling 403, is made of the same material as the ceiling 403, and is surrounded by an insulated ceiling space 62. By providing space of 250 mm or more above the intake port 142 of the air conditioner indoor unit 15, 1000 mm or more in front of the air conditioner indoor unit 15, and 300 mm or more on each of the left and right sides of the air conditioner indoor unit 15, the intake air flows smoothly into the intake port 142, the downward discharge airflow 470 flows smoothly from the outlet port 140, and the space is large enough to allow for maintenance.

[0100] On the underside of the ceiling chamber 414, flush with the ceiling 403, a louver 416 is provided that minimizes pressure loss when the discharge airflow 470 and intake airflow 417 pass through it. Directly above the louver 416 is a pre-filter (not shown) with the same area as the louver 416, and directly above the right half of the pre-filter (not shown) is an air purification unit 540. The pre-filter, air purification unit 540, and blower 455 can be cleaned and maintained by removing the louver 416 from the entrance hall 17 side. In this embodiment, the air purification unit 540 is installed above the louver 416, but it may also be installed inside the blower 455 upstream of the sirocco fan. However, this would make the blower 455 larger and potentially increase the suction resistance. In that case, the intake port 415 would have to be removed to perform maintenance such as cleaning the air purification unit 540.

[0101] In the above configuration, during the summer when the outside temperature is approximately 35°C, if the entrance hall 17, living room 20, and guest room 22 are not being cooled, and the desire is to cool the living room 20 and guest room 22 (where the indoor unit 15 of the air conditioner is not installed), but the entrance hall 17 does not need to be cooled, this is called cooling priority operation for other rooms. However, since the room temperature in the entrance hall 17 is not being cooled, it is relatively high at approximately 30°C. The indoor unit 15 of the air conditioner is set to a low temperature of 25°C using the remote control (not shown), and the fan speed is set to low to start cooling operation. Then, the angle of the airflow louvers 145 is set to adjust the angle of the discharged airflow 170 to "horizontal direction (0°)", and the airflow volume of the blower 455 is set to the maximum of 500m³. 3 Drive at / h The air intake temperature of 30°C, detected by an intake air temperature sensor (not shown) from the intake port 142 of the indoor unit 15 of the air conditioner, is set to 25°C on the remote control and the set airflow is set to low. Based on this intake air temperature of 30°C, the compressor (not shown) of the outdoor unit (not shown) of the air conditioner is driven at a high frequency, controlling the electric expansion valve (not shown) and the outdoor fan (not shown), etc., to adjust the enthalpy and circulation amount of the refrigerant flowing into the heat exchanger (not shown) of the indoor unit 15 of the air conditioner, thereby increasing the cooling capacity of the air conditioner on the first floor, and adjusting the temperature of the discharged airflow 170 of the indoor unit 15 of the air conditioner to a relatively low 16°C.

[0102] The temperature of the discharged airflow 170 is 16℃, and due to the density of the air, it tends to become a downward airflow. However, the intake port 415 (intake port G) of the blower 455 is installed on the side wall 412 of the ceiling room 414, 2m in front of the indoor air conditioner unit 15, facing the indoor air conditioner unit 15, at a height equal to or lower than the height of the air outlet 140 of the indoor air conditioner unit 15. Therefore, even if it is a downward airflow, the discharged airflow 170 tends to be drawn into the intake port 415 as an intake airflow 171. Also, the fan speed is set to low when the air conditioner is running, and it reaches approximately 5m. 3 / min(300m 3 Because of this, at the location of the intake port 415, the discharge airflow 170 is reduced to a wind speed of 1 m / s or less, and the airflow of the blower 455 at the same location is 500 m³. 3Compared to the 1.5-2 m / s wind speed of the intake airflow at the intake port 415 due to / h, the wind speed is slower and the wind pressure is lower, so more than 70% of the discharge airflow 170 becomes the intake airflow 171 and is drawn into the intake port 415. Furthermore, the heat exchange unit 95 has a strong notch ventilation airflow of 150 m³. 3 The unit operates at / h, mixing the conditioned air with the heat-exchanged outdoor air from the heat exchange unit 95 via a branch pipe 360. This mixed air is then blown out from the outlet 50 in the living room 20 and the outlet 52 in the guest room 22. The conditioned return air passes through the return air vents 85 and 86 and returns to the entrance hall 17 as a return airflow 378. The airflow of the return airflow 378 is 500 m³. 3 / h+Ventilation air volume 150m 3 650m per hour 3 At / h, the entrance hall 17 becomes positively pressurized, and the air pressure of the return airflow towards the intake port 415 increases. Furthermore, the return airflow consists of air that has been conditioned and the outside air that has undergone heat exchange, and since it is slightly warmer than the room temperature in the entrance hall 17, it becomes an upward airflow and moves towards the intake port 415.

[0103] The intake airflow 417 is drawn in by the aforementioned return airflow 378, and together with the return airflow 378, a larger amount of intake airflow is drawn into the louver 416, where it is mixed with the discharge airflow 170 in the mixing section 180. The temperature of the air drawn in at the intake port 415 is set to approximately 22°C, which is 8K lower than the room temperature of the entrance hall 17 (30°C), and approximately 23°C of air is discharged from the outlets 50 and 52, respectively, over a distance of 250m. 3 The air is blown out as supply air at a rate of / h to cool the living room 20 and guest room 22, which are at a room temperature of approximately 30°C. A portion of the air in the mixing unit 180 is drawn in as an intake airflow 181 through the space between the indoor air conditioner unit 15 and the ceiling room 414, and into the intake port 142 of the indoor air conditioner unit 15. Furthermore, if the airflow of the heat exchange unit 95 is reduced or stopped, or if the outdoor air that has undergone heat exchange by the heat exchange unit 95 is not blown out from the air outlet 50 in the living room 20 and the air outlet 52 in the guest room 22, the ventilation airflow will be 150 m³. 3 Even if / h is not added to the return airflow 378, the relative positional relationship between the air outlet 140 and the intake port 415 of the air conditioner indoor unit 15 means that the effect of the discharge airflow 170 being easily drawn into the intake port 415 as the intake airflow 171 remains unchanged.

[0104] Furthermore, for operation in both rooms with cooling, prioritizing the user's own room with cooling, prioritizing other rooms with heating, operating both rooms with heating, and prioritizing the user's own room with heating, the environment suitable for the purpose of each operation can be achieved by setting the temperature, airflow, angle of the airflow louvers 145, airflow volume, etc., as in Embodiment 3.

[0105] Ceiling rooms 404 and 414 are part of the entrance hall 17 and are basically installed in a way that they protrude into the ceiling space 62 on the first floor, which is an insulated space. However, if the height does not fit, they may be installed by extending through the ceiling space 62 and into the roof space 9 or other insulated space above it. The insulation of ceiling spaces 404 and 414 only needs to be the minimum necessary, as they are installed in an insulated space. This can be adjusted by changing the thickness or presence of insulation materials such as glass wool according to the insulation performance of the insulated space and the temperature of the intake air. The airtightness of ceiling chambers 404 and 414 only needs to be sufficient to prevent air leakage from anywhere other than the bottom of ceiling chambers 404 and 414. However, since the area around intake vents 405 and 415 is both an insulated space and a narrow space, even if the airtightness is slightly lower, the efficiency will be slightly reduced, but there will be no problems such as condensation. Furthermore, if that insulated space is also air-conditioned, even if it is not airtight, the efficiency will be slightly reduced, but there will be no problems such as condensation. Furthermore, regarding the shape of the ceiling chamber 414, the relative positional relationship between the air outlet 140 and the intake port 405 of the indoor air conditioner unit 15, and the shape of the louvers 416, if the intake airflow 181 flows smoothly into the intake port 142 of the indoor air conditioner unit 15, and the angle setting of the air direction louvers 145 of the indoor air conditioner unit 15, the airflow setting, etc., ensures that when other rooms are prioritized, the discharge airflow 170 reaches the intake port 415, and when this room is prioritized, it passes through the louvers 416 and blows out downwards into the entrance hall 17, then the operation and effect of this embodiment can be obtained, and the objective can be achieved.

[0106] As described above, normally, when cooling, the airflow from an air conditioner tends to become a downward airflow due to the density of the air, and if the intake is on the ceiling, it is difficult to draw in a large amount of the airflow. However, in this embodiment, by providing a ceiling chamber or the like, the intake is installed in front of the indoor unit of the air conditioner at a height equal to or lower than the height of the air outlet of the indoor unit, the direction of the airflow is made horizontal, the wind speed is reduced, and the fan is operated to increase the wind speed of the air drawn in at the intake, so that a large amount of the airflow can be drawn in at the intake even when cooling. Furthermore, compared to Embodiment 3, because it does not depend on the operation of the heat exchange unit or the ventilation airflow, it reduces total power consumption, including the power consumption of the air conditioner, and provides an air conditioning system that can adjust the temperature of rooms without air conditioners without over-cooling or over-heating the rooms where air conditioners are installed, thus ensuring comfort. Furthermore, in addition to the aforementioned temperature control, the air purification system has the same effects and benefits for the entire building as in Embodiment 1. Moreover, because the fresh outside air after heat exchange is mixed with the conditioned air and supplied directly to each room, it is possible to reliably and quickly improve the air quality in each room by reducing CO2 and odors. Furthermore, since a pre-filter, air purification unit, blower, etc. are installed inside the intake port or grille, maintenance such as cleaning and replacement can be easily performed by opening the grille, etc. Furthermore, because the air conditioner is embedded and installed in the ceiling cavity or similar space, it does not stand out in terms of the room's design, resulting in a clean and uncluttered look. In addition, the ceiling space, such as the attic, has ample depth, providing ample space for installing the air conditioner, intake, ducts, etc., making installation easy.

[0107] (Embodiment 6) Figure 25 shows the configuration of the air conditioning system in Embodiment 6 of the present invention, and is an airflow diagram in the stairwell 18 when cooling other rooms takes priority. This embodiment 6 differs from embodiment 3 in its configuration, including the intake port, blower, and duct connection, resulting in different operation and effects. Below, only the differing parts will be described; the parts not described are basically the same as embodiment 3.

[0108] An air conditioning system 501 is installed in a two-story building (not shown) with high airtightness and high heat insulation, and air-conditions and ventilates rooms and the like inside the building. As the configuration of this air conditioning system 501, in the staircase hall 18, on the ceiling above the air conditioner indoor unit 16 and on the center in the left-right direction of the air conditioner indoor unit 16, the lower surface of the suction port 505 (suction port H) is installed. The suction port 505 is a rectangular parallelepiped having airtightness and heat insulation properties, composed of a suction gallery 506 and a housing 507. On the surface of the housing 507 in the same direction as the wall surface where the air conditioner indoor unit 16 is installed, four blowers 555, 556, 557, and 558 are installed such that their respective suction ports 565, 566, 567, and 568 are connected to the space inside the suction port 505.

[0109] The suction port 505 is basically installed in the attic space 63 on the second floor, which is a heat insulation space. However, if the height does not fit, it may be installed in the roof space 9, which is also a heat insulation space. Since the heat insulation property of the suction port 505 is installed in a heat insulation space, it may be the minimum required, such as changing the thickness or presence / absence of a heat insulating material such as glass wool according to the heat insulation property of the heat insulation space and the suction air temperature. Regarding the airtightness of the suction port 505, airtight seals and the like are attached to the mating surfaces of the housings 507, the mating surface of the housing 507 and the suction gallery 506, and the mating surfaces of the housing 507 and the blowers 555 etc., so as not to suck air from outside the suction gallery 506. However, since the periphery of the suction port 505 is also a heat insulation space, in a relatively narrow space of 5 tatami mats or less, even if the airtightness is somewhat low, although the efficiency drops somewhat, there are no problems such as condensation. If that heat insulation space is also air-conditioned, even if there is no airtightness, such as a part of the surface of the housing 507 being missing, as long as most of the air sucked from the suction gallery 506 is sucked by the blowers 555 etc., even if air is sucked from outside the suction gallery 506, although the efficiency drops somewhat, there are no problems such as condensation.

[0110] Also, directly above the suction gallery 506, there is a pre-filter (not shown) with the same area as the suction gallery 506, and an air purification unit 540 is provided directly above the left half of the pre-filter (not shown). The pre-filter, the air purification unit 540, and the blowers 555, 556, 557, 558 can be maintained, such as being cleaned, by removing the suction gallery 506 from the side of the staircase hall 18. Then, air outlets 50, 51, 52, 53 are respectively installed on the ceilings 44, 45, 46, 47 of the living room 20, the bedroom 21, the guest room 22, and the children's room 23 (space B). In order to blow out the air sucked in through the suction port 505 from the air outlets 50, 51, 52, 53, the ducts 570, 571, 572, 573 respectively connected to the blowers 555, 556, 557, 558 are passed through the heat insulation sections such as the ceiling space 62, 63, and the blowers 555, 556, 557, 558 connected to the suction port 505 and the air outlets 50, 51, 52, 53 are connected by the ducts 570, 571, 572, 573 while maintaining airtightness, thereby forming an air supply duct for the whole house from the suction port 505 in the staircase hall 18 to the air outlets 50 in the living room 20, the air outlet 51 in the bedroom 21, the air outlet 52 in the guest room 22, and the air outlet 53 in the children's room 23.

[0111] Inside the blowers 555, 556, 557, 558, a DC motor (brushless DC motor) (not shown) that is more energy-efficient than an AC motor and can control the rotational speed in a wider range steplessly and a sirocco fan (not shown) are provided. When the air volume is set by a switch (not shown), the sirocco fan rotates to suck air from the suction ports 565, 566, 567, 568, and the sucked air flows through the ducts 570, 571, 572, 573 and blows out from the air outlets 50 in the living room 20, the air outlet 52 in the guest room 22, the air outlet 51 in the bedroom 21, and the air outlet 53 in the children's room 23. The maximum air volume (strong notch) of the blowers 555, 556, 557, 558 is respectively 250 m 3 / h, but the maximum air volume sucked from the suction gallery 506 and passing through the suction port 505 is 1000 m 3 / h. Therefore, the suction gallery 506 has a suction area suitable for sucking 1000 m 3 / h, which is the maximum air volume. The outer dimensions are 500 mm * 1000 mm, and the height of the suction port 505 is 700 mm so that the air volume does not decrease due to the internal pressure loss.

[0112] Furthermore, as part of the configuration of this air conditioning system 501, a return air vent 85 (return air section), such as an undercut, is provided in the door (not shown) between the guest room 22 and the living room 20, and a return air vent 86 (return air section), such as an undercut, is provided in the door (not shown) between the living room 20 and the entrance hall 17, thereby forming a return air passage from the guest room 22 and the living room 20 to the entrance hall 17, and from the entrance hall 17 through the stairs to the stairwell 18. A return air vent 87 (return air section), such as an undercut, is provided in the door (not shown) between the children's room 23 and the bedroom 21, and a return air vent 88 (return air section), such as an undercut, is provided in the door (not shown) between the bedroom 21 and the stairwell 18, thereby forming a return air passage from the children's room 23 and the bedroom 21 to the stairwell 18. Then, the supply air passage and the return air passage are connected, and the supply air, which is conditioned air mixed with the air blown out from the indoor unit 16 of the air conditioner in the stairwell 18 and the air in the stairwell 18, is drawn in through the intake grille 506, passes through the intake port 505, and then through the blower 555 and other ducts 570 and other ducts, and is blown out from the outlet 50 in the living room 20, the outlet 52 in the guest room 22, the outlet 51 in the bedroom 21, and the outlet 53 in the children's room 23. The conditioned return air is returned to the stairwell 18 through the return air outlets 85, 86, 87, 88, the entrance hall 17, and the stairs, forming a circulating air passage (not shown).

[0113] In the above configuration, the airflow when air conditioning is prioritized for other rooms will be explained. In summer, when the outside temperature is approximately 35°C, and the stairwell 18, living room 20, bedroom 21, guest room 22, and children's room 23 are not being cooled, and the desire is to cool the living room 20, bedroom 21, guest room 22, and children's room 23 (where the indoor unit 16 of the air conditioner is not installed), but the stairwell 18 does not need to be cooled, this is called "cooling priority operation for other rooms." However, since the room temperature in the stairwell 18 is not being cooled, it is relatively high at approximately 30°C. The indoor unit 16 of the air conditioner is set to a low temperature of 25°C using the remote control (not shown), and the fan speed is set to medium to start cooling operation. Then, the angle of the airflow louvers 146 is set to adjust the angle of the discharged airflow 170 to "horizontal direction (0°)," and the airflow volume of the fans 555, 556, 557, and 558 is set to the maximum of 250 m³ each. 3 Drive at / h Based on the intake air temperature of 30°C detected by an intake air temperature sensor (not shown) from the intake port 143 of the indoor unit 16 of the air conditioner, the remote control set temperature of 25°C, and the set airflow rate, the inverter drive frequency of the compressor (not shown) of the outdoor unit (not shown) of the air conditioner is driven at a high frequency, controlling the electric expansion valve (not shown) and the outdoor blower (not shown), etc., to adjust the enthalpy and circulation amount of the refrigerant flowing into the heat exchanger (not shown) of the indoor unit 16 of the air conditioner, thereby increasing the cooling capacity that the air conditioner can provide, and adjusting the temperature of the discharged airflow 170 of the indoor unit 16 of the air conditioner to a relatively low 18°C.

[0114] The temperature of the 170°C outlet airflow is 18°C, and due to the density of the air, it tends to become a downward airflow, approximately 7 m³ of the airflow during cooling operation. 3 / min(420m 3 Because of this, at the location of the intake grille 506 installed on the ceiling within approximately 1m above the indoor unit 16, on the left-right center of the indoor unit 16, the discharge airflow 170 has a wind speed of approximately 1.5m / s, but the total airflow of the blower 555 and other fans at the same location is 1000m³. 3 Compared to the 2 m / s wind speed of the intake airflow of the intake grille 506 at / h, the wind speed is slower and the wind pressure is lower, so more than 70% of the discharge airflow 170 becomes the rising intake airflow 576 and 577 and is drawn into the intake grille 506. Furthermore, the heat exchange unit (not shown) provides a strong notch ventilation airflow of 280 m³ for the entire building. 3 The system operates at / h, and the heat-exchanged outdoor air flows through ducts 570, 571, 572, and 573, each for 70m. 3 The ventilation air at / h is mixed with the conditioned air, and 250 m³ of conditioned air is supplied to each of the living room 20, bedroom 21, guest room 22, and children's room 23. 3 / h+ventilation air 70m 3 The air is blown out at a rate of / h. As return air after air conditioning, on the second floor, it passes through return air vents 87 and 88 and returns to the stairwell 18 as return airflow 578. On the first floor, it passes through return air vents 85 and 86, the entrance hall 17, and the stairs (not shown) and returns to the stairwell 18 as return airflow 579. Therefore, the total airflow of return airflows 578 and 579 is 1000 m³. 3 / h+Ventilation air volume 280m 3 1280m / h 3 At / h, the stairwell 18 becomes positively pressurized, and the air pressure of the return airflow towards the intake grille 506 increases. Furthermore, the return airflows 578 and 579 consist of conditioned air and ventilation air (outdoor air after heat exchange), and are slightly warmer than the room temperature in the stairwell 18, so they become upward airflows and move towards the intake grille 506.

[0115] The intake airflows 576 and 577 are drawn in by the aforementioned return airflows 578 and 579, and together with the return airflows 578 and 579, a larger amount of intake airflow is directly drawn into the intake grille 506. The temperature of the air drawn in by the intake grille 506 is set to approximately 22°C, which is 8K lower than the room temperature of 30°C in the stairwell 18, and approximately 23°C of air is discharged from the outlets 50, 51, 52, and 53, respectively, over a distance of 250m. 3 / h air supply and 70m 3 The air is blown out as ventilation air at a rate of / h to cool and ventilate the living room 20, bedroom 21, guest room 22, and children's room 23, where the room temperature is approximately 30°C. A portion of the discharge airflow 170 that is not directly drawn in is mixed with the return airflows 578, 579, etc. in the mixing section 580, and the majority of it is drawn into the intake port 143 of the indoor unit 16 of the air conditioner as the intake airflow 581. Regarding air purification, the intake airflow 577 passes through the pre-filter (not shown) of the intake grille 506, then through the air purification unit 540 located directly above the left half of the pre-filter. The purified air then merges with the air that flows directly into the intake port 505, becoming clean supply air. This clean air replaces the air in the living room 20, bedroom 21, guest room 22, and children's room 23, becoming slightly polluted return air, which then returns to the stairwell 18 for further air purification. This process is repeated, maintaining a high level of air purity in the stairwell 18, entrance hall 17, living room 20, bedroom 21, guest room 22, and children's room 23.

[0116] When the heat exchange unit (not shown) is operated, the heat-exchanged outdoor air is mixed with the conditioned air drawn in by the intake grille 506 from the blower 555 and others in the duct 570 and others, and blown into the room, supplying fresh outside air and conditioned the room. The returned air, which contains CO2 and humidity increased by the people, returns to the entrance hall 17 and stairwell 18 through the return air outlets 86 and 88. A portion of the air in the entrance hall 17 and stairwell 18 is discharged as exhaust airflow (not shown) and exhaust airflow 186, respectively, through the grille 135 installed between the toilet 100 and the entrance hall 17 and the grille 136 installed between the toilet 101 and the stairwell 18, further maintaining high air quality in the stairwell 18, entrance hall 17, living room 20, bedroom 21, guest room 22, and children's room 23.

[0117] Additionally, if you only want to cool bedroom 21 and children's room 23, you can use only the fans 556 and 558 connected to outlets 51 and 53, respectively, with an airflow of 250 m³. 3 It should be operated at / h, but in that case the airflow rate drawn in from the intake grille 506 will be 500m 3 Since the value per hour is small, set the airflow of the indoor unit 16 of the air conditioner to low, and the airflow of the cooling operation is approximately 5m 3 / min(300m 3 The airflow ( / h) is reduced, and at the location of the intake grille 506 installed on the ceiling approximately 1m above the indoor unit 15, above the center in the left-right direction of the indoor unit 15, the discharge airflow 170 is reduced to a wind speed of 1m / s or less, and the airflow of the blower 556 and other fans at the same location is 500m3 Compared to the 1.5-2 m / s wind speed of the intake airflow of the intake grille 506 at / h, the wind speed is slower and the wind pressure is lower, so more than 70% of the discharge airflow 170 becomes the rising intake airflow 576 and 577 and is drawn into the intake grille 506. Furthermore, when you want to operate the living room 20, bedroom 21, guest room 22, and children's room 23 while the stairwell 18 is being cooled, this is called dual-room cooling operation. However, since the stairwell 18 is being cooled, the room temperature is slightly lower at about 27°C. Therefore, to slightly reduce the cooling in your own room while increasing the cooling in the other rooms, it is basically the same as the priority cooling operation for other rooms shown in Figure 23 above. However, the indoor unit 16 of the air conditioner is set to a lower temperature of 23°C using the remote control (not shown), the fan speed is set to medium, and cooling operation continues. Then, the angle of the airflow louvers 146 is set to adjust the angle of the discharged airflow 170 to "horizontal direction (0°)", and the airflow volume of the blowers 555 and others is set to the maximum of 250m³. 3 Drive at / h

[0118] Furthermore, for operations such as prioritizing cooling in the own room, prioritizing heating in other rooms, operating heating in both rooms, and prioritizing heating in the own room, the differences between each operation, such as differences in set temperature, airflow, angle of the airflow louvers 146, and airflow rate, are based on the operation prioritizing cooling in other rooms in Embodiment 3. In this embodiment, the environment can be adjusted to match the purpose of each operation by implementing the adjustments corresponding to these differences in each operation, based on the operation prioritizing cooling in other rooms. In this embodiment, the air conditioning system 501 is installed in the stairwell 18, but it may also be installed in the entrance hall 17, or in both if there are many rooms to be air-conditioned. Thus, in this embodiment, since the intake grille and intake port are installed in the ceiling of the room where the air conditioner is installed, the intake grille is not conspicuous in terms of the room's design, resulting in a clean look. Furthermore, while there is often little depth to install intake ports and ducts in walls, the ceiling has sufficient depth as a space above the ceiling, such as an attic, providing ample space to install intake ports and ducts, thus offering excellent ease of installation. Normally, during cooling, the airflow from an air conditioner tends to become a downward airflow due to the density of the air. If the intake grille is on the ceiling, it is difficult to draw in a large amount of the airflow. However, in this embodiment, by installing the intake grille in close proximity to the top of the air conditioner, setting the direction of the airflow horizontal, lowering the wind speed, and operating multiple fans, the wind speed of the air drawn into the intake grille is increased, as is the wind speed of the return airflow to the intake grille. This return airflow can then draw in the airflow from the outlet to the intake grille, allowing a large amount of airflow to be drawn in even during cooling.

[0119] Furthermore, compared to Embodiment 3, the number of fans and the total airflow are increased, which slightly increases their power consumption. However, because it does not depend on the operation of the heat exchange unit and the ventilation airflow, the total power consumption, including the power consumption of the air conditioner, is reduced. This results in an air conditioning system that can cool or heat rooms with air conditioners more than necessary, while also being able to adjust the temperature in rooms without air conditioners, thus providing a comfortable environment. Furthermore, in addition to the aforementioned temperature control, the air purification system has the same effects and benefits for the entire building as in Embodiment 1. Moreover, because the fresh outside air after heat exchange is mixed with the conditioned air and supplied directly to each room, it is possible to reliably and quickly improve the air quality in each room by reducing CO2 and odors. Furthermore, since a pre-filter, air purification unit, blower, etc. are installed inside the intake port, maintenance such as cleaning and replacement can be easily performed by opening the intake grille.

[0120] (Embodiment 7) Figure 26 is a cross-sectional view of a building showing the configuration of the air conditioning system 601 in Embodiment 7 of the present invention. This embodiment 7 differs from embodiment 1 in the configuration of the return air passage, such as the return air port with an undercut, and as a result, the operation and effect are different. Below, only the differences will be described, and the parts that are not described are basically the same as embodiment 1.

[0121] On the first floor 4 of building 3, the door between guest room 22 and living room 20 (not shown) and the door between living room 20 and entrance hall 17 (not shown) do not have undercuts or other ventilation openings. Furthermore, on the second floor, the door (not shown) between the children's room 23 and the bedroom 21 does not have an undercut or other ventilation opening. This might be done when there is no structural space to install a return air vent, when you want to prevent noise leakage from the adjacent room through the return air vent, when you want to keep the door tightly closed to better protect your privacy, or when you want to reduce the overall air conditioning load by not air conditioning the space in the middle of the return air path.

[0122] On the first floor, 4, return air intakes 640 and 641 are provided in the ceilings 44 and 46 of the living room 20 and guest room 22, respectively, to draw in the returned air after air conditioning. The return air intakes 640 and 641 are connected to a return air blower 655 and ducts 670 and 671, respectively, which are installed in the ceiling space. A return air outlet 650 installed in the ceiling of the entrance hall 17 is connected to the return air blower 655 by a duct 672. This forms a return air passage on the first floor from the living room 20 and guest room 22 to the entrance hall 17. The return air blower 655 has a built-in fan (not shown) and motor (not shown). When the return air blower 655 is operated, the conditioned air blown out from the outlets 50 and 52 conditioned the living room 20 and the guest room 22. The conditioned return air is drawn in from the return air intakes 640 and 641, passes through the ducts 670 and 671, then passes through the return air blower 655 and duct 672, and is blown out from the return air outlet 650 into the entrance hall 17.

[0123] On the second floor 5, the ceiling 47 of the children's room 23 is equipped with a return air intake 642 into which the returned air after air conditioning is drawn in, and a return air blower 656 having a fan (not shown) and a motor (not shown). The return air blower 656 is connected by a duct 673 to a return air outlet 651 installed in the ceiling of the stairwell 18. This forms a return air passage on the second floor from the bedroom 21 and the children's room 23 to the stairwell 18.

[0124] When the ventilation blower 656 for return air is operated, the conditioned air blown out from the air outlet 53 conditions the children's room 23. The return air after conditioning is sucked in from the return air inlet 642, passes through the duct 673, and is blown out from the return air outlet 651 into the staircase hall 18. The conditioned air blown out from the air outlet 51 conditions the bedroom 21. The return air after conditioning returns to the staircase hall 18 from a return air opening 88 (return air section) such as an undercut, as in the first embodiment. The return air outlets 650 and 651 are provided on the ceiling near the opposite wall away from the air conditioner indoor units 15 and 16 and the inlets (inlets C) 42 and 43 in the entrance hall 17 and the staircase hall 18. Therefore, the return air blown out from the return air outlets 650 and 651 is not immediately sucked into the air conditioner indoor units 15 and 16 and the inlets 42 and 43, similar to the return air returning from the undercut 88. The return air is mixed with the air in the entrance hall 17, the staircase hall 18, etc. and the blown air blown out from the air conditioner indoor units 15 and 16, making the temperature and humidity in the entrance hall 17 and the staircase hall 18 uniform, and is sucked in from the inlets 42 and 43 as supply air, which is conditioned air. In particular, since the inlets (inlets C) 42 and 43 are provided below the air conditioner indoor units 15 and 16, the blown air from the return air outlets 650 and 651 provided on the ceiling blows downward and descends along the right wall of the entrance hall 17 and the staircase hall 18. Then, the blown air is well mixed with the airflow going from near the floor toward the inlets 42 and 43 and the blown air blown out horizontally and downward from the air conditioner indoor units 15 and 16, and is sucked into the inlets 42 and 43.

[0125] If you want to actively air-condition the living room 20, bedroom 21, guest room 22, and children's room 23, but not the entrance hall 17 and stairwell 18, you should install return air outlets 650 and 651 on the ceiling directly above the air intakes (not shown) of the indoor air conditioning units 15 and 16. This way, the returned air after air conditioning will not stagnate in the entrance hall 17 and stairwell 18, but will be drawn into the indoor air conditioning units 15 and 16, blown out, and drawn back in through the intakes 42 and 43. As a result, the overall air conditioning load can be reduced, resulting in greater energy savings and faster air conditioning of the rooms you want to actively air-condition. By positioning the return air intakes 640, 641, and 642 as far away as possible from the air outlets 50, 52, and 53, the living room 20, guest room 22, and children's room 23 can be air-conditioned uniformly. Furthermore, by adjusting the airflow of the return air fans 655 and 656, it is possible to adjust the temperature and humidity in the entrance hall 17, stairwell 18, living room 20, guest room 22, and children's room 23 to suit individual preferences.

[0126] In this embodiment, on the first floor 4, the return air blower 655 is installed in the ceiling space between the return air intake ports 640, 641 and the return air outlet port 650. This is to reduce the noise from the return air blower 655 in living spaces such as the living room 20 by placing the return air blower 655 as far away as possible from the return air intake ports 640, 641 and the return air outlet port 650 and connecting them with ducts. To further prevent noise propagation, it is advisable to partially install a sound-absorbing duct between the return air intake ports 640, 641 and the return air outlet port 650. However, installing the return air intake 642 and the return air blower 656 as a single unit on the ceiling of the second floor 5, and removing the return air intake 642 from the children's room 23 to perform maintenance on the return air blower 656, improves the ease of maintenance and installation of the return air blower. Furthermore, in this embodiment, return air blowers 655 and 656 are provided between the return air intake and the return air outlet. If the return air intake and return air outlet are installed in adjacent rooms and are very close together, or if the duct is too wide relative to the airflow, the minimum necessary amount of air will be returned by operating the blowers 55 and 56, even without the return air blowers 655 and 656 between the return air intake and the return air outlet. Therefore, although the air conditioning performance may decrease, there are advantages such as improved maintenance and ease of installation, and reduced initial costs. In this embodiment, the return air intake and return air outlet are connected by a duct. Alternatively, instead of a duct, a housing can be constructed by enclosing a portion of the ceiling space 62 and 63 side of the return air intake and return air outlet with wood and insulation material, and this can be used as a chamber through which the conditioned return air can pass.

[0127] (Embodiment 8) Figure 27 is a cross-sectional view of a building showing the configuration of the air conditioning system 701 in Embodiment 8 of the present invention. This embodiment 8 differs from embodiment 3 in the configuration of the return air passage, such as the return air port with an undercut, and as a result, the operation and effect are different. Below, only the differences will be described, and the parts that are not described are basically the same as embodiment 3.

[0128] On the first floor 4 of building 3, a private room 720 is provided between the entrance hall 17 and the living room 20. The doors between the private room 720 and the entrance hall 17 (not shown), the doors between the living room 20 and the private room 720 (not shown), and the doors between the guest room 22 and the living room 20 (not shown) do not have undercuts or other air return openings. Room 720 does not have an air vent. Furthermore, on the second floor, the door (not shown) between the children's room 23 and the bedroom 21 does not have an undercut or other ventilation opening. This might be done when there is no structural space to install a return air vent, when you want to prevent noise leakage from the adjacent room through the return air vent, when you want to keep the door tightly closed to better protect privacy, or when you want to reduce the overall air conditioning load by not venting the space in the middle of the return air path.

[0129] On the first floor 4, return air intakes 740 and 741 are provided in the floors (not shown) of the living room 20 and guest room 22, respectively, for drawing in the returned air after air conditioning. The return air intakes 740 and 741 are connected to a return air blower 755 and ducts 770 and 771, respectively, which are located in the underfloor space 10. A return air outlet 750 located in the floor (not shown) of the entrance hall 17 is connected to the return air blower 755 by a duct 772. This forms a return air passage on the first floor from the living room 20 and guest room 22 to the entrance hall 17. The return air blower 755 has a built-in fan (not shown) and motor (not shown). When the return air blower 755 is operated, the conditioned air blown out from the outlets 50 and 52 conditioned the living room 20 and the guest room 22. The conditioned return air is drawn in from the return air intakes 740 and 741, passes through the ducts 770 and 771, then passes through the return air blower 755 and duct 772, and is blown out from the return air outlet 750 into the entrance hall 17.

[0130] On the second floor 5, a return air blower 756 is provided on the floor (not shown) of the children's room 23, which has a return air intake 742 for drawing in the returned air after air conditioning, a fan (not shown), and a motor (not shown). The return air blower 756 is connected by a duct 773 to a return air outlet 751 provided on the floor (not shown) of the stairwell 18. This forms a return air passage on the second floor from the bedroom 21 and the children's room 23 to the stairwell 18.

[0131] When the return air fan 756 is operated, the conditioned air blown out from the outlet 53 conditioned the children's room 23. The conditioned return air is drawn in from the return air intake 742, passes through the duct 773, and is blown out from the return air outlet 751 into the stairwell 18. The conditioned air blown out from the outlet 51 and returned to the bedroom 21 after being conditioned returns to the stairwell 18 through a return air outlet 88 (return air section), such as an undercut, similar to the third embodiment. The return air outlets 750 and 751 are located in the entrance hall 17 and stairwell 18, on the floor near the opposite wall, away from the indoor air conditioning units 15 and 16 and the intake ports (intake ports F) 305 and 306. Therefore, the return air blown out from the return air outlets 750 and 751, like the return air returning from the undercut 88, is not immediately drawn into the indoor air conditioning units 15 and 16 and the intake ports 305 and 306. This return air is mixed with the air in the entrance hall 17 and stairwell 18 and the blown air from the indoor air conditioning units 15 and 16, resulting in a uniform temperature and humidity in the entrance hall 17 and stairwell 18, and is then drawn in as conditioned air through the intake ports 305 and 306. In particular, since the intake ports (intake ports F) 305 and 306 are located slightly in front of and above the indoor air conditioner units 15 and 16, the air blown out from the return air outlets 750 and 751 located on the floor is blown upward and rises along the right wall of the entrance hall 17 and stairwell 18. The blown air is then well mixed with the airflow coming from near the ceiling towards the intake ports 305 and 306 and the air blown out horizontally downward from the indoor air conditioner units 15 and 16, and is then drawn into the intake ports 305 and 306.

[0132] By positioning the return air intakes 740, 741, and 742 as far away as possible from the air outlets 50, 52, and 53, the living room 20, guest room 22, and children's room 23 can be uniformly air-conditioned. Furthermore, by adjusting the airflow of the return air fans 755 and 756, it is possible to adjust the temperature and humidity in the entrance hall 17, stairwell 18, living room 20, guest room 22, and children's room 23 to suit individual preferences.

[0133] In this embodiment, on the first floor 4, the return air blower 755 is installed in the underfloor space 10 between the return air intake ports 740, 741 and the return air outlet port 750. This is to reduce the noise from the return air blower 755 in living spaces such as the living room 20 by placing the return air blower 755 as far away as possible from the return air intake ports 740, 741 and the return air outlet port 750 and connecting them with a duct. To further prevent the propagation of noise, it is advisable to partially install a sound-absorbing duct between the return air intake ports 740, 741 and the return air outlet port 750. On the second floor, the return air intake port 742 and the return air blower 756 are installed as a single unit in the ceiling space 62 under the floor. By removing the return air intake port 742 from the children's room 23 and performing maintenance on the return air blower 756, the ease of maintenance and installation of the return air blower 756 can be improved. Furthermore, in this embodiment, return air fans 755 and 756 are provided between the return air intake and the return air outlet. When the return air intake and return air outlet are installed in adjacent rooms and are very close together, or when the duct is too wide relative to the airflow, the minimum necessary amount of air will be returned by operating fans 355 and 356, even without return air fans 755 and 756 between the return air intake and the return air outlet. Therefore, although the air conditioning performance may decrease, there are advantages such as improved maintenance and ease of installation, and reduced initial costs. In this embodiment, the return air intake and return air outlet are connected by a duct. Alternatively, instead of a duct, the four sides of the underfloor space 10 and part of the ceiling space 62 side of the return air intake and return air outlet can be enclosed with wood and insulation material, creating a chamber through which the conditioned return air can pass.

[0134] (Embodiment 9) Figure 28 is a cross-sectional view of a building showing the configuration of the air conditioning system 801 in Embodiment 9 of the present invention. Building 803 is a multi-story apartment building, and in apartment 804, which is located above and below building 803, an air conditioning system 801 is installed to provide air conditioning and ventilation to the rooms and other areas within apartment 804. House 804 has four sides (top, bottom, left, right, front, and back) that are adjacent to neighboring houses. The windows are triple-glazed resin sash windows 807 on the south side and insulated sash windows 808 on the north side, and the doors are insulated doors (not shown), so that the entire room and space inside House 804 is an airtight and insulated space.

[0135] The indoor air conditioner unit 815 is part of the air conditioner, which is a component of this air conditioning system 801. The indoor air conditioner unit 815 is installed on wall 834 of living room 820 (space A). In this embodiment, the indoor air conditioner unit 815 is installed in the living room 820, but it may also be installed in living rooms such as the bedroom 821, guest rooms (not shown), and children's rooms (not shown), or in non-living rooms such as walk-in closets (not shown), storage rooms (not shown), corridors 825, and machine rooms (not shown). The indoor unit 815 of the air conditioner, which is part of the air conditioning system, is connected to the outdoor unit 830 of the air conditioner installed on the balcony 805 by refrigerant piping (not shown) and electrical wiring (not shown), and this system is referred to as an air conditioner (air conditioning unit, not shown).

[0136] Furthermore, the configuration of this air conditioning system 801 includes an intake port 842 (intake port J) installed in the floor 836 of the living room 820, below the wall 835 opposite the wall 834 where the indoor unit 815 of the air conditioner is installed, and an outlet port 850 installed in the floor 836 of the bedroom 21. A blower 855 having a fan (not shown) and a motor (not shown) is installed on the underfloor space 810 side of the outlet port 850 so as to be connected to the outlet port 850. Then, a rectangular chamber 860 with airtightness and heat insulation is provided in the underfloor space 810 so as to enclose the intake port 842 and the blower 855 together. When the blower 855 is operated, the air drawn in at the intake port 842 passes through the chamber 860, is drawn into the blower 855, and blows out from the outlet port 850. In this way, an air supply path is formed from the intake port 842 in the living room 820 to the outlet port 850 in the bedroom 821.

[0137] Furthermore, the configuration of this air conditioning system 801 includes a return air intake port 845 in the ceiling 847 of the bedroom 821, into which the returned air after air conditioning the bedroom 821 is drawn in, and an air purification unit 840 is located inside the return air intake port 845. Then, a return air blower 856 having a return air outlet 851 and a fan (not shown) and motor (not shown) is installed in the ceiling 848 of the living room 820. It is connected to the return air intake port 845 by duct 873, branch pipe 874, and duct 875. This forms a return air passage from the bedroom 821 to the living room 820. Then, the supply air passage and the return air passage are connected, and the supply air, which is conditioned air mixed with the air blown out from the indoor unit 815 of the living room 820 and the air in the living room 820, is drawn in from the intake port 842, passes through the chamber 860 and the blower 855, and is blown out from the outlet 850 of the bedroom 821. The conditioned return air is drawn in from the return air intake port 845, passes through the duct 875, branch pipe 874, duct 873, and return air blower 856, and is blown out to the living room 820 from the return air outlet 851, forming a circulating air passage (not shown).

[0138] In the hallway 825, a heat exchange unit 895 is installed in the ceiling space 862 to introduce outside air into the room and expel indoor air to the outside, recovering all the heat from the indoor air into the outdoor air, thereby ventilating the house 804. In this embodiment, the heat exchange unit 895 has a 24-hour ventilation airflow of 100 m³. 3 With a high-notch ventilation airflow of 150 m³ / h, the total heat exchange efficiency is approximately 70%. Ventilation vents 902, such as exhaust grilles, are provided in the ceiling of the corridor 825 to exhaust the air inside the corridor 825. The ventilation vents 902 are connected to the heat exchange unit 895. An outdoor exhaust hood 905 is installed in a penetration hole in the exterior wall of building 803, and is connected to a heat exchange unit 895 by an exhaust duct 907. The heat exchange unit 895 includes an introduction fan (not shown) for introducing outdoor air, an exhaust fan (not shown) for exhausting indoor air, a motor (not shown), and a heat exchange element 910 for recovering the total heat from the indoor air into the outdoor air.

[0139] Furthermore, the heat exchange unit 895 is installed so as to be in contact with the ceiling of the corridor 825. Therefore, the heat exchange element 910 and the pre-filter for the element (not shown) can be easily cleaned and maintained periodically from the ceiling of the corridor 825. As a result, the indoor air is exhausted through the ventilation exhaust port 902, the heat is recovered by the heat exchange unit 895, and the air is exhausted outside through the exhaust duct 907 and the outdoor exhaust hood 905. The indoor air exhaust passage is formed between the ventilation exhaust port 902 and the outdoor exhaust hood 905, and is formed by the heat exchange unit 895 and the exhaust duct 907, respectively. The indoor air exhaust passage is provided with an exhaust fan for the heat exchange unit 895, but other exhaust fans may be provided in addition to or together with the exhaust fan. An outdoor air supply hood 915 is installed in a penetration hole in the exterior wall of building 3, and is connected to a heat exchange unit 895 by an air supply duct A917.

[0140] A filter box 920 is installed in the air supply duct A917 so as to be in contact with the ceiling of the corridor 825. The filter box 920 has an outside air purification filter (not shown) that purifies the outside air introduced into the ceiling space 862, making it easy to perform maintenance such as cleaning the filter from the ceiling. Then, the heat exchange unit 895 and the branch pipe 874 are connected by the air supply duct B930. As a result, outdoor air is introduced from the outdoor air supply hood 915, passes through the air supply duct A917, and is purified in the filter box 920. The outdoor air recovers all its heat in the heat exchange unit 895, passes through the air supply duct B930, merges with the return air from the bedroom 821 in the branch pipe 874, passes through the duct 873 and the return air blower 856, and is blown out into the living room 820 from the return air outlet 851.

[0141] The outdoor air intake passage is formed between the outdoor air supply hood 915 and the return air outlet 851, and is comprised of an air supply duct A917, a filter box 920, a heat exchange unit 895, an air supply duct B930, a branch pipe 874, and a duct 873. The corridor 825 does not have an outlet for supplying conditioned air, and undercuts 885 and 886 are provided between it and the living room 820 and bedroom 821, respectively, allowing air to enter and exit through the doors. When the heat exchange unit 895 is in operation, some of the return air, which is the air that has been conditioned and ventilated in the living room 820 and bedroom 821, flows into the corridor 825 through the undercuts 885 and 886. When the air conditioning environment is stable, the air quality (temperature, humidity, cleanliness, etc.) in the corridor is close to that of the conditioned air.

[0142] When the heat exchange unit 895 is in operation, fresh outdoor air, purified by the filter box 920 installed in the outdoor air intake path, is introduced by the introduction fan of the heat exchange ventilation unit 895. CO2 from people's respiration in the living room 820 and bedroom 821, as well as air contaminated with moisture and dust emitted from people, and a portion of the return air, which is the air that has been air-conditioned in the room, enter the heat exchange unit 895 through the ventilation exhaust port 902 and the indoor air exhaust path, and is then driven by the exhaust fan of the heat exchange unit 895. After heat exchange with the outdoor air in the heat exchange element 910, the air is discharged outside, so that dust, mold spores, etc. from outside do not enter the house 804. Therefore, CO2, moisture, odors, etc. from daily life are discharged to the outside, and by heat exchange, it is possible to reduce dust, moisture, mold spores, etc. inside the building while ventilating the house 804 in an energy-saving manner. In this embodiment, a ventilation exhaust vent 902 is provided in the corridor 825. Outside of the corridor, for example, in rooms and spaces such as toilets, washrooms, bathrooms, and kitchens, which are so-called dirty zones where odors, moisture, harmful substances, etc., tend to be generated and accumulate, ventilation exhaust vents and undercuts or louvers may be provided. In that case, these can be discharged directly to the outside without passing through other rooms or spaces. However, if the heat exchange element 910 of the heat exchange unit 895 is not resistant to deterioration from moisture in bathrooms, oil in kitchens, etc., it will be necessary to provide a separate ventilation fan.

[0143] Within the living room 820, a return air outlet 851 is provided on the ceiling 848 within 1 meter in front of the indoor air conditioner unit 815, and is located above the center in the left-right direction of the indoor air conditioner unit 815. On the floor 836, an intake port 842 (intake port J) is provided below the wall 835 opposite the wall 834 on which the indoor air conditioner unit 815 is installed. The combined air of the conditioned return air from bedroom 821 and the heat-exchanged outdoor air from the heat exchange unit 895 is blown downward from the return air outlet 851. Most of the blown air is drawn into the intake port (not shown) at the top of the indoor air conditioner unit 815, and the conditioned air is blown out from the indoor air conditioner unit 815. The air blown from the return air outlet 851 that is not drawn into the indoor air conditioner unit 815 is further drawn downward towards the intake port 842. The approach to selecting the capacity, airflow, set temperature, and airflow louvers of the indoor unit 815 of the air conditioner is the same as that described in Embodiments 1 to 8.

[0144] The air blown out from the indoor unit 815 of the air conditioner ventilates the living room 820, creating a uniform air quality in the living room 820, before being drawn into the intake port 842. The intake port 842 is located on the floor because, in apartment buildings, the cooling load is usually high and the heating load is low due to heat storage in the concrete, etc. Also, in this embodiment, the indoor unit of the air conditioner is installed in the living room with a large window on the south side, and the cooling load is high due to solar radiation, etc., so the airflow that is advantageous during cooling operation is considered. When the living room is being cooled, the density of the blown air is high and it tends to flow downwards, so the intake port 842 is located on the floor to make it easier to draw in a large amount of this blown air. During heating operation, even if the air direction louver angle of the indoor unit 815 of the air conditioner tends to rise due to its density, but the downward attraction of the blown air from the return air outlet 851 makes it easier for it to go towards the intake port 842.

[0145] By positioning the return air intake 845 of bedroom 821 at a diagonally opposite distance from the air outlet 850, the entire bedroom 821 can be uniformly air-conditioned. In bedroom 821, the returned air after air conditioning is drawn in through the return air intake 845, some of which passes through the air purification unit 840 for purification, is then blown out from the return air outlet 851 in living room 820, and returns to bedroom 821. As a result, both living room 820 and bedroom 821 have their air purified. Maintenance and replacement of the air purification unit 840, such as cleaning, can be easily performed from the bedroom 821 side. To return the conditioned air from the north-facing bedroom 821 back to the south-facing living room 820, even without operating the indoor unit 815 of the air conditioner at night during the summer, simply running the circulating air path will naturally lower the temperature in the living room 820. Furthermore, the concept of airflow for the blower 855 and the return air blower 856 is the same as in Embodiments 1 to 8. By adjusting the airflow, it is possible to adjust the temperature and humidity of the living room 820 and bedroom 821 to suit individual preferences.

[0146] In this embodiment, the intake port 842 and the outlet port 850 are connected by a chamber 860. This has the advantage of allowing the number and layout of intake and outlet ports to be freely changed, and facilitating maintenance such as cleaning, especially in cases where the floor of an apartment building or similar structure has a double floor. However, if it is difficult to maintain airtightness or maintenance is not easy, it is better to connect them with ducts. The internal structure of the return air intake port 845 is the same as in Figure 3, and the effect of the air purification unit 840 is the same as in Embodiment 1.

[0147] In this embodiment, the outdoor air and return air are combined in the branch pipe 874 and blown out from the return air outlet 851. However, the outdoor air ventilation inlet and return air outlet may be provided separately, and the outdoor air return air outlet may be directed to a location other than the living room 820. This would increase the number of outlets and ducts, requiring duct space in the ceiling space. However, the ventilation flow and the air conditioning flow of the house 804 could be separated. For example, the ventilation exhaust vent could be provided in the so-called "dirty zone," such as the toilet or washroom, and the ventilation intake vent could be provided in the corridor. This would allow outdoor air to flow from the corridor to the toilet, etc., and odors, moisture, etc., could be discharged to the outside from the toilet, etc.

[0148] Furthermore, in this embodiment, the return air intake and return air outlet are connected by a duct, but instead of a duct, it is also possible to enclose a portion of the ceiling space 862 side of the return air intake and return air outlet with wood and insulation material to create a housing, which will serve as a chamber through which the conditioned return air will pass. This is because, in the case of apartment buildings, the high airtightness often results in insufficient return airflow from just undercutting the door, leading to inadequate air conditioning capacity. Furthermore, there is often no structural space to install a separate return air vent. Additionally, this approach may be considered when it is necessary to prevent noise leakage from adjacent rooms through the return air vent, to ensure greater privacy by keeping the door tightly closed, or to reduce the overall air conditioning load by not conditioned the space along the return air path.

[0149] In this embodiment, the air purification unit 840 is installed at the return air intake port 845, but it may also be installed at the return air outlet port 851, intake port 842, or outlet port 850 if maintenance is easily possible, and a filter box may be provided separately in the duct.

[0150] (Embodiment 10) Figure 29 is a diagram showing the airflow in the stairwell 18 during cooling, illustrating the configuration of the air conditioning system 951 in Embodiment 10 of the present invention. This embodiment 10 differs from embodiment 6 in its configuration, including the intake port, blower, and duct connection, resulting in different operation and effects. Below, only the differing parts will be described; the parts not described are basically the same as embodiment 6.

[0151] The 951 air conditioning system is installed in a two-story building (not shown) that is a highly airtight and well-insulated house. One heat exchange ventilation unit is also installed, providing air conditioning and ventilation to rooms on the first and second floors of the building. As part of the configuration of this air conditioning system 951, in the stairwell 18 (space A), a ceiling room 964 (space K) is provided above the ceiling 953, on the wall 983 side and extending towards the attic space 959 side. In the wall 984 of the ceiling room 964, a relatively large capacity air conditioner indoor unit 966 with a cooling capacity of about 4kW is installed in the upper part of the ceiling room 964, and two intake ports 957 and 958 (intake ports L) are installed on the wall 984 below the air conditioner indoor unit 966, with the center of the air conditioner indoor unit 966 in the left-right direction as the center. Then, air outlets 50, 51, 52, 53, etc. are installed in the ceilings 44, 45, 46, 47, etc. of a total of eight rooms (space B) consisting of a living room 20, a bedroom 21, a guest room 22, a children's room 23, and four other rooms (not shown). Two blowers (not shown) are connected to ducts 961, 962, etc., and these are routed through insulated sections such as the attic space 959 and the ceiling space (not shown) to blow out the air drawn in at intake ports 957, 958 from the air outlets 50, 51, 52, 53, etc. The blowers (not shown) connected to intake ports 957, 958 and the air outlets 50, 51, 52, 53, etc. are connected to ducts 961, 962, branch pipes (not shown), and other ducts (not shown) in an airtight manner. By doing so, an air intake duct is formed throughout the entire house, from the intake ports 957 and 958 in the ceiling room 964 above the stairwell 18 to the air outlet 50 in the living room 20, the air outlet 51 in the bedroom 21, the air outlet 52 in the guest room 22, the air outlet 53 in the children's room 23, and the air outlets (not shown) in four other rooms (not shown). The basic configuration of the blower (not shown) is the same as that of the blowers 55 and 56 in Embodiment 1, but the maximum airflow rate (high setting) is increased to 750 m³ by increasing the motor speed and enlarging the external dimensions of the housing, fan, etc. 3 It's being increased to / h. The basic configuration of the suction ports 957 and 958 (suction port L) is the same as that of the suction ports 42 and 43 (suction port C) in Embodiment 1, and the maximum airflow rate of the blower (not shown) is approximately 750 m³. 3 To draw in air at / h, the intake area of ​​the intake louver (not shown) is increased in proportion to the airflow rate, but at the same time, the ratio of airflow that flows directly into the air purification bypass intake air passage (not shown) may also be increased. The ceiling chamber 964 is a rectangular parallelepiped consisting of a housing 956 having an intake louver 955 (opening) on ​​the same surface as the ceiling 953, and is airtight and has thermal insulation properties. The air conditioner 966, intake ports 957 and 958 are installed so as to be connected to the stairwell 18 through the intake louver 955.

[0152] The ceiling chamber 964 is equipped with a relatively large air conditioner indoor unit 966 and two air intakes 957 and 958. Therefore, in this embodiment, the ceiling chamber 964 is larger than the air intake 505 in Embodiment 6. In this embodiment, the ceiling chamber 964 is basically installed in the attic space 959, which is an insulated space. However, in the case of a building that does not have an attic space 959, or where there is no space in the attic space 959 to install a large ceiling chamber 964, two smaller ceiling chambers 964 may be installed in the attic space 959 of the first and second floors, respectively. In that case, the cooling capacity of the air conditioner is reduced to, for example, 2.2kW, and two small air conditioner indoor units 966 are installed, one in each of the two smaller ceiling chambers 964. Then, two air intakes 957 and 958 are installed, one in each of the two smaller ceiling chambers 964. During cooling operation, condensation may occur inside the ceiling chamber 964 due to the air blown out from the indoor unit 966 of the air conditioner. Therefore, the ceiling chamber 964 has insulation properties by attaching insulating material such as glass wool to the outer perimeter of the housing 956. Furthermore, to ensure airtightness in the ceiling chamber 964, airtight seals are applied to the joints between the housings 956, the joints between the housings 956 and the ceiling 953, and the joints between the housings 956 and the intake ports 957, 958, etc., to prevent air from being drawn in from anywhere other than the intake grille 955.

[0153] Furthermore, directly above the intake grille 955 and below the intake ports 957 and 958, a baffle plate 960 is installed, approximately the width of the intake ports 957 and 958 and approximately the depth of the indoor unit 966 of the air conditioner. This prevents the return air from the stairwell 18 through the intake grille 955 from taking a shortcut and being directly drawn into the intake ports 957 and 958. The pre-filters (not shown) and air purification units (not shown) inside the intake ports 957 and 958 can be cleaned and maintained by removing the intake grille 955 from the stairwell 18 side.

[0154] Inside the blower (not shown), there is a DC motor (brushless DC motor) (not shown) which is more energy-efficient than an AC motor and allows for stepless control of the rotation speed over a wider range, and a sirocco fan (not shown). When the airflow is set using a switch (not shown), the sirocco fan rotates to draw in air from intake ports 957 and 958. The drawn-in air flows through ducts 961 and 962, and from a branch pipe (not shown), through multiple ducts (not shown), is blown out from outlets (not shown) in the living room 20 (outlet 50), guest room 22 (outlet 52), bedroom 21 (outlet 51), children's room 23 (outlet 53), and four other rooms (not shown). The maximum airflow rate (high setting) of each fan (not shown) is 750 m³. 3 Although it is per hour, since there are two units, the maximum airflow passing through the intake grille 955 is 1500 m³. 3 It becomes / h. Therefore, the intake grille 955 has a maximum airflow of 1500 m³. 3 The external dimensions are set to 1000mm*1500mm, taking into account the space required for the air blown out from the indoor unit 966 of the air conditioner to have a suitable intake area for drawing in air at / h, and the height of the ceiling chamber 964 is set to 1000mm so that the indoor unit 966 of the air conditioner and the intake ports 957 and 958 can be installed vertically, and to secure an intake air passage above the indoor unit 966 of the air conditioner.

[0155] Furthermore, as part of the configuration of this air conditioning system 951, a return air vent 85 (return air section), such as an undercut, is provided in the door (not shown) between the guest room 22 and the living room 20, and a return air vent 86 (return air section), such as an undercut, is provided in the door (not shown) between the living room 20 and the entrance hall 17, thereby forming a return air passage from the guest room 22 and the living room 20 to the entrance hall 17, and from the entrance hall 17 through the stairs to the stairwell 18. A return air vent 87 (return air section), such as an undercut, is provided in the door (not shown) between the children's room 23 and the bedroom 21, and a return air vent 88 (return air section), such as an undercut, is provided in the door (not shown) between the bedroom 21 and the stairwell 18, thereby forming a return air passage from the children's room 23 and the bedroom 21 to the stairwell 18. In the other four rooms (not shown), return air vents (not shown), such as undercuts and bypass openings, are provided in the doors and walls adjacent to the corridor, entrance hall 17, stairwell 18, etc., to form return air passages. Then, the supply air passage and the return air passage are connected, and the conditioned air, which is a mixture of the air blown out from the indoor unit 966 of the air conditioner in the stair hall 18 and the return air drawn in from the stair hall 18 through the intake grille 955, passes through the intake ports 957 and 958, and through ducts 961 and 962, a blower (not shown), and other components, is blown out from the outlet 50 in the living room 20, the outlet 52 in the guest room 22, the outlet 51 in the bedroom 21, the outlet 53 in the children's room 23, and the outlets (not shown) in four other rooms (not shown). The conditioned return air is returned to the stair hall 18 via the return air ports 85, 86, 87, and 88, the entrance hall 17, the stairs (not shown), the corridor (not shown), etc., forming a circulating air passage (not shown).

[0156] In the above configuration, the airflow during cooling will be explained. In summer, when the outside temperature is approximately 35°C, if the stairwell 18, living room 20, bedroom 21, guest room 22, children's room 23, and four other rooms (not shown) are not being cooled, and the goal is to primarily cool the living room 20, bedroom 21, guest room 22, children's room 23, and four other rooms (not shown) which are habitable rooms and do not have an air conditioner indoor unit installed, while also wanting to cool the stairwell 18, which is not a habitable room, to a level that prevents heat shock, the room temperature in the stairwell 18 is relatively high at approximately 30°C because it is not being cooled. In this case, the air conditioner indoor unit 966 is set to a low temperature of 22°C using the remote control (not shown), and the fan speed is set to high to start cooling operation. Then, the angle of the airflow louvers 996 is set to adjust the angle of the blown airflow 970 to "diagonally downward (45°)", and the airflow volume of the blowers (not shown) is set to the maximum of 750 m³. 3 Drive at / h The air intake airflow 972 at 30°C, drawn in from the intake port (not shown) of the indoor unit 966 of the air conditioner, is detected by an intake air temperature sensor (not shown). Based on the detected intake air temperature of 30°C, the remote control set temperature of 22°C, and the set airflow volume (high), the inverter drive frequency of the compressor (not shown) of the outdoor unit (not shown) of the air conditioner is driven to a high frequency, controlling the electric expansion valve (not shown) and the outdoor blower (not shown), etc., to adjust the enthalpy and circulation amount of the refrigerant flowing into the heat exchanger (not shown) of the indoor unit 966 of the air conditioner, thereby increasing the cooling capacity that the air conditioner can provide, and adjusting the temperature of the discharge airflow 970 of the indoor unit 966 to a relatively low 18°C.

[0157] The temperature of the discharged airflow 970 is 18℃, and due to the density of the air, it tends to become a downward airflow. However, there is a baffle plate 960 directly below the indoor unit 966 of the air conditioner, and to avoid this, the angle of the discharge louver 996 is set to a downward 45° angle. Therefore, maintaining that discharge angle, the airflow at the highest setting for cooling operation is approximately 15m 3 / min(900m 3 A discharge airflow 970 of 1 / h is formed. Of the air conditioner intake airflow 972 and bypass intake airflow 971 drawn from the intake grille 955 into the ceiling room 964 by a blower (not shown), approximately 700m at 30°C 3The bypass intake airflow 971 at / h is drawn into the ceiling chamber 964, avoiding the baffle plate 960. Then, the discharge airflow 970 and the bypass intake airflow 971 collide in the mixing section 973 within the ceiling chamber 964, generating turbulence and mixing, resulting in the intake airflow 974 of approximately 22°C, approximately 1500m 3 The air at / h is drawn into the intake ports 957 and 958. In addition, the discharge airflow at approximately 22°C is 975, approximately 100m 3 / h is blown out from the intake grille 955 into the stairwell 18. Furthermore, the heat exchange unit (not shown) provides a strong notch ventilation airflow of 280 m³ for the entire building. 3 The system operates at / h, and the heat-exchanged outdoor air merges into ducts 961 and 962, each for 140m. 3 The ventilation air at / h is mixed with the conditioned air, and through branching points (not shown) and ducts (not shown), approximately 188 m³ of conditioned air is supplied to each of the following rooms: living room 20, bedroom 21, guest room 22, children's room 23, and four other rooms (not shown). 3 / h+ ventilation air approximately 35m 3 / h is emitted. After air conditioning, the returned air on the second floor passes through return air vents 87, 88, etc., and returns to the stairwell 18 as return airflow 978. On the first floor, it passes through return air vents 85, 86, etc., the entrance hall 17, and the stairs (not shown) and returns to the stairwell 18 as return airflow 979. Similarly, for the other four rooms (not shown), the returned air after air conditioning returns to the stairwell 18. Therefore, the total airflow volume of return airflow 978 and 979 is equal to the supply airflow volume of 1500 m³. 3 / h+Ventilation air volume 280m 3 1780m / h 3 At / h, the stairwell 18 becomes positively pressurized, and the air pressure of the return airflow towards the intake grille 955 increases. Furthermore, the return airflows 978 and 979 consist of conditioned air and ventilation air (outdoor air after heat exchange), and when the cooling operation is stable, they are slightly higher than the room temperature in the stairwell 18, so they become an upward airflow and head towards the intake grille 955.

[0158] The bypass intake airflow 971 and the air conditioner intake airflow 972 are drawn into the aforementioned return airflows 978 and 979, and together with the return airflows 978 and 979, a larger amount of intake airflow is directly drawn into the intake grille 955, setting the temperature of the mixed conditioned air in the ceiling room 964 to approximately 22°C, which is 8K lower than the room temperature of 30°C in the stairwell 18. Approximately 23°C of conditioned air is then released from outlets 50, 51, 52, 53, etc., over a distance of approximately 188m. 3 Air supply per hour and approximately 35m 3 The air is blown out as ventilation air at a rate of / h to cool and ventilate the living room 20, bedroom 21, guest room 22, children's room 23, and four other rooms (not shown) where the room temperature is approximately 30°C. The stairwell 18 is cooled by a 22°C outflow airflow 975, and other spaces such as corridors, stairwells, and entrance halls 17 through which the return air passages pass are also cooled to a constant temperature and ventilated by the passage of return air containing outside air. Regarding air purification, the intake airflow 974 passes through the pre-filters (not shown) of the intake ports 957 and 958, and then through the air purification units (not shown) inside the intake ports 957 and 958. The purified air then merges with the air that flows directly into the intake ports to form clean conditioned air, which replaces the air in the living room 20, bedroom 21, guest room 22, children's room 23, and four other rooms (not shown). As this slightly polluted return air returns to the stairwell 18, where it is purified again. This process is repeated, maintaining a high level of air purity in the stairwell 18, entrance hall 17, corridors, stairs, etc., as well as in the living room 20, bedroom 21, guest room 22, children's room 23, and four other rooms (not shown).

[0159] The heat-exchanged outdoor air from the heat exchange unit (not shown) and the conditioned air drawn in by the blower (not shown) through the intake grille 955 are mixed in ducts 961, 962, etc., and blown into the rooms, etc. This air, which is fresh outside air that has been used to conditioned the rooms, etc., and contains CO2 and humidity increased by the people, returns to the entrance hall 17 and stairwell 18 through return air outlets 86, 88, etc. A portion of the air in the entrance hall 17 and stairwell 18 is discharged as exhaust airflow (not shown) and exhaust airflow 186, respectively, through grille 135 installed between the toilet 100 and the entrance hall 17, and grille 136 installed between the toilet 101 and the stairwell 18, and the air quality in the stairwell 18, entrance hall 17 and the living room 20, bedroom 21, guest room 22, children's room 23 and four other rooms (not shown) is further maintained at a high level.

[0160] If the stairwell 18 is not to be actively cooled, set the angle of the airflow louvers 996 of the indoor unit 966 of the air conditioner to adjust the angle of the discharged airflow 970 to "directly downward (90°)", set the airflow to medium, and operate the cooling function with the same airflow volume and temperature settings as described above for the fan (not shown). The downward-blowing airflow 970 hits the baffle plate 960, causing its flow velocity to slow down near the mixing section 973. The bypass intake airflow 971 is then drawn in and collides with the airflow 970. As a result, almost all of the conditioned air mixed in the mixing section 973 becomes the intake airflow 974, which is drawn into the intake ports 957 and 958. As a result, almost no airflow 975 is generated, and the mixed conditioned air does not blow out into the stairwell 18, thus not actively conditioned. However, since return air and ventilation air pass through the stairwell 18, a constant temperature and air quality are maintained.

[0161] Furthermore, during heating operation, the discharge airflow 970 has buoyancy and does not easily move downwards in the ceiling room 964. Therefore, by setting the airflow of the indoor unit 966 of the air conditioner to high and adjusting the angle of the air direction louvers 996 from 60° diagonally downwards to 90° straight down, most of the discharge airflow 970 reaches the mixing unit 973, and some of the conditioned air becomes the discharge airflow 975 and can be blown out into the stairwell 18. Thus, just as during cooling operation, the stairwell 18, the living room 20 and bedroom 21, the guest room 22, the children's room 23, and four other rooms (not shown) can be heated and ventilated.

[0162] While not a whole-house air conditioning system, when installing air conditioners with high cooling capacity to air-condition more rooms and spaces, the air conditioning load is large. If the room or space where the air conditioner is installed is small, condensation may occur even if the surrounding area is insulated. Furthermore, due to the density of the blown air during cooling, the intake vent must be positioned below the air conditioner for the blown air to be easily drawn into the intake vent. In such cases, as in this embodiment, one solution is to create a ceiling chamber above the ceiling of the room, with the air conditioner located at the top of the ceiling chamber and the intake vent at the bottom. To prevent condensation in the ceiling chamber, the volume of the ceiling chamber should be increased, the airflow from the fan should be increased, and the positional relationship should be determined so that the airflow from the air conditioner does not directly hit the intake vent in the ceiling chamber. The direction of the airflow should be adjusted so that the airflow from the air conditioner mixes well with the bypass intake airflow from the fan, and the temperature of the air drawn in at the intake vent should not fall below the dew point temperature. In cooling mode, it is necessary to keep the temperature within 10K, preferably within 5K, relative to the room temperature. For example, in a configuration like that shown in Figure 24 of Embodiment 5, where many rooms are air-conditioned, the cooling capacity of the air conditioner is large, the volume of the ceiling chamber is small, the airflow from the fan is small, and the airflow from the air conditioner directly hits the intake, increasing the likelihood of condensation near the intake during cooling. For example, in the case of a 4kW air conditioner with a relatively large cooling capacity, the temperature of the blown air may fall below 15°C depending on the relationship between the airflow, set temperature, and intake temperature. However, if the air blown from the air conditioner directly hits the intake and the surface temperature of the intake falls below 15°C, and air with a relative humidity of 50% or more at 27°C is drawn into the intake, condensation may occur because the dew point temperature is approximately 16°C. In this embodiment, however, the volume of the ceiling chamber is large, the airflow from the fan is large, and the intake is located below the wall where the air conditioner is installed. As a result, the air blown from the air conditioner does not directly hit the intake, thus preventing condensation. Furthermore, the large total airflow allows for cooling of more rooms and spaces.

[0163] Furthermore, during heating, the density of the blown air decreases, but because the air conditioner and the intake are close together, and the direction of the blown airflow is directed more towards the intake, the conditioned air is drawn into the intake directly below the air conditioner, allowing other rooms to be adequately air-conditioned. In this way, by adjusting the temperature and airflow of the air conditioner's discharged air based on the room temperature of the room with a ceiling chamber above, the air conditioner's operating mode, set temperature, and airflow setting, and by adjusting the angle of the air conditioner's discharged airflow by setting the air direction louvers of the air conditioner, and by adjusting the airflow volume of the blower, the temperature of the air drawn in at the intake can be adjusted to within 20K during heating and within 10K during cooling relative to the room temperature.

[0164] In this embodiment, a ceiling chamber 964 is provided in the attic space 959 above the stairwell 18, and the air conditioning system 951 is installed there. However, if there is an insulated space above the room where a ceiling chamber 964 can be installed, it may be installed in the entrance hall 17 or a corridor (not shown), and if there are many rooms to be air-conditioned, it may be installed in both.

[0165] Furthermore, in this embodiment, the air conditioner indoor unit 966 and intake ports 957 and 958 are provided in the ceiling chamber 964. However, some of these components may be provided in the stairwell 18, for example, by providing the intake ports 957 and 958 in the stairwell 18. In that case, the ceiling chamber 964 can be made smaller, which is advantageous for ensuring sufficient airflow for the intake air from the intake ports 957 and 958 and for air conditioning the stairwell 18. However, there is a possibility of condensation in the air conditioning chamber 964, deterioration of the mixing between the discharge airflow 970 of the air conditioner indoor unit 966 and the bypass intake airflow 971, deterioration of the design due to the exposure of the intake ports 957 and 958 to the stairwell 18, and deterioration of the intake noise from the intake ports 957 and 958.

[0166] Furthermore, when there are many rooms or spaces to be air-conditioned, the cooling capacity of the air conditioner increases, and consequently, the number and volume of fans also increase. When the volume of the ceiling room exceeds the volume of a room of 1 tatami mat or more, the area and location of the intake grille that can secure sufficient airflow becomes important in order to achieve the air conditioning capacity and reduce noise. However, there are also problems such as not being able to secure space for the ceiling room. For this reason, instead of insisting on installing the space with the air conditioner and intake vents in the upper part of the ceiling, it is also possible to set up a separate air conditioning room in a room or space connected to the rooms or spaces to be air-conditioned by a return air passage, for example, in a stairwell, entrance hall, corridor, etc., where there is space above, below, to the left, and to the right, and install the air conditioner and intake vents or fans in the air conditioning room. In this air conditioning room, intake grilles with sufficient area for drawing in return air may be installed in a reasonable location.

[0167] Furthermore, in this embodiment, the intake ports 957, 958, the ducts 961, 962 connected to the intake ports, and the refrigerant piping and drain piping connected to the indoor unit 966 of the air conditioner can be installed in the attic space 959 adjacent to the wall 984 of the ceiling room 964. This eliminates the need to use living space such as rooms adjacent to the stairwell 18, resulting in a simpler design and excellent workability. Furthermore, by installing the intake grille 955 in the ceiling chamber 964, the indoor unit of the air conditioner 966 and the intake ports 957 and 958 are not conspicuous in terms of the room's design, resulting in a clean and uncluttered look. Furthermore, in addition to the aforementioned temperature control, the air purification system has the same effects and benefits for the entire building as in Embodiment 1. Moreover, because the fresh outside air after heat exchange is mixed with the conditioned air and supplied directly to each room, it is possible to reliably and quickly improve the air quality in each room by reducing CO2 and odors. Furthermore, since a pre-filter, air purification unit, etc. are installed inside the intake port, maintenance such as cleaning and replacement can be easily performed by opening the intake grille and the intake louver (not shown) of the intake port.

[0168] Furthermore, compared to embodiments 3 and 6, the cooling capacity of the air conditioner is increased, and the number of fans and total airflow are increased, resulting in a slight increase in their power consumption, but this does not depend on the operation of the heat exchange unit or the ventilation airflow. Therefore, the total power consumption, including the power consumption of the air conditioner, can be reduced. In addition, an air conditioning system can be obtained that does not overcool or overheat the room where the air conditioner is installed, and the temperature of rooms without air conditioners can also be adjusted, making them comfortable.

[0169] In all of these embodiments, the term "duct" refers to a resin duct with insulation properties provided by glass wool or the like. However, a chamber air passage may also be used by enclosing a portion of an insulated space, such as an underfloor space, attic space, or inter-floor space, on all four sides with wood and insulation material, and using this enclosure as a chamber air passage.

[0170] (Embodiment 11) Figure 30 is a cross-sectional view of a building showing the configuration of an air conditioning system in Embodiment 11 of the present invention. This embodiment 11 differs from embodiment 1 in its configuration of the intake port, blower, duct, heat exchange unit, etc., and as a result, its operation and effects are different. Below, only the differences will be described, and the parts that are not described are basically the same as embodiment 1. As shown in the diagram, the air conditioning systems 1001 and 1002 are installed one system each on the first floor 1004 and the second floor 1005 of a two-story building 1003, which is a highly airtight and highly insulated house, and provide air conditioning and ventilation to the rooms and other areas within the building 1003. Building 1003 is completely covered with insulation material (not shown) and airtight sheet (not shown) with no gaps in the outer envelope. The roof 1006 is insulated, the foundation 1007 is insulated, the windows are insulated sashes 1008 such as triple-glazed resin sashes, and the doors are insulated doors (not shown). Including the attic space (insulated space) 1009, the underfloor space (insulated space) 1010, and the inter-floor space (insulated space) 1062, all rooms and spaces within building 1003 are insulated spaces. There are two main types of insulation: exterior insulation and interior insulation. The choice of insulation method depends on the advantages and disadvantages of each. However, this study focuses on buildings 1003 that have no insulation defects in their building envelope and meet at least the ZEH (Zero Energy House) insulation performance standards. Regarding airtightness performance, although it depends on the specifications of the airtight sheet, the target buildings are those that maintain the continuity of the airtight layer by applying airtight tape or similar to the seams of the airtight sheet, and that meet at least a C value of 1.0. The underfloor space 1010 is covered above and below by air-conditioned rooms and insulated foundations, and the front, back, left, and right sides are covered by exterior walls with insulating material, and airtight treatment is applied mainly to the contact surfaces, resulting in a highly airtight and insulated air conditioning duct 1063. The inter-floor space 1062 is a space created by attaching the floor subflooring (not shown) of the second floor 1005, floor 1027, 1028, and 1029 to the upper side of beams (not shown) and joists (not shown) fixed to columns (not shown), and attaching the ceiling subflooring (not shown) and ceiling (not shown) of the first floor 1004 to the lower side. The height is generally 300 to 400 mm. An air conditioning duct 1064 is provided in the inter-floor space 1062. The air conditioning duct 1064 is surrounded by horizontally laid floor subfloor boards, floor, ceiling subfloor boards, and ceiling, and is enclosed by vertically laid boards on all four sides. To enhance the airtightness between them, an airtight sheet is applied mainly to the contact surfaces, creating an airtight structure.

[0171] The indoor air conditioning units 1015 and 1016, which are part of the air conditioning system 1001 and 1002, are installed in the entrance hall 1017 (space A) on the first floor and the stairwell 1018 (space A) on the second floor, respectively. In this embodiment, the indoor air conditioning units 1015 and 1016 are installed in the entrance hall 1017 and the stairwell 1018, but they may also be installed in living rooms such as the living room 1020, bedroom 1021, guest room 1022, and children's room 1023, or in non-living spaces such as the attic space 1009, underfloor space 1010, inter-floor space 1062, under the stairs (not shown), and machine room (not shown). Similarly, the indoor air conditioning units 1015 and 1016, which are part of the air conditioning system, are connected to the outdoor air conditioning units 1030 and 1031, respectively, which are installed outside, by refrigerant piping and electrical wiring 1032. This system is referred to as the air conditioner on the first floor (not shown) and the air conditioner on the second floor (not shown). As part of the configuration of this air conditioning system 1001, six intake ports (intake port M, blower) 1042, 1043, etc., each containing a blower (not shown), are installed below the wall 1033 on which the indoor unit 1015 of the air conditioner is installed, and air outlets 1050, 1051, etc. are installed on the floors 1025, 1026, etc. of the living room 1020, guest room 1022, etc. (space B). A front panel 1055 is installed in front of the indoor air conditioner unit 1015 and the intake ports 1042, 1043, etc., facing them directly. The size of the front panel 1055 is such that, when viewed from the front, it is approximately the height of the air outlet (not shown) of the indoor air conditioner unit 1015, and its width is larger than the outer dimensions of the indoor air conditioner unit 1015 and larger than the width of the outer dimensions of the six intake ports 1042, 1043, etc. Due to the front panel 1055, a portion of the airflow blown out from the air outlet of the indoor air conditioner unit 1015 hits the front panel 1055 and is drawn into the intake ports 1042, etc. Furthermore, the intake ports 1042, etc. are hidden by the front panel 1055 and are not visible from the front, improving the aesthetic appearance of the interior in the entrance hall 1017. Furthermore, the front panel 1055 reflects the operating noise of the air conditioner indoor unit 1015 and the blower (not shown) inside the intake port 1042, thereby reducing noise in front of the front panel 1055. In this case, further noise reduction can be achieved by attaching sound-absorbing or sound-insulating materials such as glass wool to the intake port 1042 side of the front panel 1055. The front panel 1055 has a louver section 1057 at its top that allows the direction of airflow to be changed. By opening and closing the louver section 1057, the airflow from the indoor unit 1015 of the air conditioner passes through the louver section 1057 of the front panel 1055 without hitting it, allowing the amount of airflow blown out in front of the front panel 1055 to be adjusted, and the temperature distribution in the entrance hall 1017 can be adjusted by changing the angle of the louver section 1057. To blow out the air drawn in at the intake port 1042, etc., from the outlet port 1050, etc., a duct 1070, etc., is connected to the intake port 1042, etc., and the duct 1070, etc., is open in the underfloor space 1010, which is the air conditioning air passage 1063. The outlet port 1050, etc., is connected to the underfloor space 1010, which is the air conditioning air passage 1063, and the air drawn in at the intake port 1042, etc., by a blower (not shown) inside the intake port 1042, etc., passes through the duct 1070, etc., pressurizes the air conditioning air passage 1063, and is blown out from the outlet port 1050, etc. To expel the air drawn in at the intake port 1043 from the outlet port 1051, a duct 1071 is connected to the intake port 1043, and the duct 1071 is connected to the outlet port 1051. The air drawn in at the intake port 1043 by a blower (not shown) passes through the duct 1071 and is blown out from the outlet port 1051. In this way, the air supply passage for the first floor 1004 is formed. Furthermore, as part of the configuration of this air conditioning system 1002, below the wall 1034 on which the indoor unit 1016 of the air conditioner is installed, five intake ports (intake port M, blower) 1048 and others, each having a blower (not shown) inside, and an intake port 1049 (intake port M) having an air purification unit 1041 inside are installed. Air outlets 1052, 1053, 1054, etc. are installed on the floors 1027, 1028, 1029, etc. of the stairwell 1018 (space A, space B), bedroom 1021, children's room 1023, etc. (space B). A front panel 1056 is provided in front of the air conditioner indoor unit 1016 and the intake ports 1048, 1049, etc., facing them directly. The size of the front panel 1056 is such that, when viewed from the front, it is approximately the height of the air outlet (not shown) of the air conditioner indoor unit 1016, and its width is greater than the outer dimensions of the air conditioner indoor unit 1016 and greater than the width of the outer dimensions of the six intake ports 1048, 1049, etc. Due to the front panel 1056, a portion of the airflow blown out from the air outlet of the air conditioner indoor unit 1016 hits the front panel 1056 and is drawn into the intake ports 1048, etc. Furthermore, the intake ports 1048, etc. are hidden by the front panel 1056 and are not visible from the front, improving the aesthetic appearance of the interior in the stairwell 1018. By adjusting the airflow direction louvers (not shown) of the air outlet (not shown) of the indoor unit 1016 of the air conditioner, the angle of the discharged airflow can be adjusted. As a result, a portion of the discharged airflow from the indoor unit 1015 of the air conditioner passes through the top of the front panel 1056 without hitting it, and the amount of airflow blown out in front of the front panel 1056 can be adjusted. To blow out the air drawn in at the intake port 1048, etc., from the outlet port 1052, etc., a duct 1072, etc. is connected to the intake port 1048, etc., the duct 1072, etc. is connected to the air conditioning air passage 1064, and the outlet port 1052, etc. is connected to the air conditioning air passage 1064. The air drawn in at the intake port 1048, etc., by a blower (not shown) inside the intake port 1048, etc., passes through the duct 1072, etc., pressurizes the air conditioning air passage 1064, and is blown out from the outlet port 1052, etc. To expel the air drawn in at the intake port 1049 from the outlet port 1054, a duct 1073 is connected to the intake port 1049, and the duct 1073 is connected to the outlet port 1054. A blower (not shown) inside the outlet port 1054 causes the air drawn in at the intake port 1049 to pass through the duct 1073 and be blown out from the outlet port 1054. In this way, the air supply passage for the first floor 1004 is formed.

[0172] Furthermore, as part of the configuration of the air conditioning systems 1001 and 1002, a return air vent 1085 (return air section), such as an undercut, is provided in the door (not shown) between the guest room 1022 and the living room 1020, and a return air vent 1086 (return air section), such as an undercut, is provided in the door (not shown) between the living room 1020 and the entrance hall 1017. Similar return air vents (not shown) are also provided from other rooms and spaces (not shown) on the first floor 1004 to the entrance hall 1017, thereby forming a return air passage on the first floor 1004 from the guest room 1022, the living room 1020, other rooms and spaces to the entrance hall 1017. A return air vent 1087 (return air section), such as an undercut, is provided in the door (not shown) between the children's room 1023 and the bedroom 1021, and a return air vent 1088 (return air section), such as an undercut, is provided in the door (not shown) between the bedroom 1021 and the stairwell 1018. Similar return air vents (not shown) are also provided from other rooms and spaces (not shown) on the second floor 1005 to the stairwell 1018, thereby forming a return air passage on the second floor 1005 from the children's room 1023, bedroom 1021, other rooms and spaces to the stairwell 1018. Then, the supply air passage and the return air passage of the first floor 1004 are connected, and in the first floor 1004, the supply air, which is conditioned air mixed with the air blown out from the indoor unit 1015 of the air conditioner in the entrance hall 1017 and the air in the entrance hall 1017, is drawn in by a fan (not shown) from the intake port 1042, etc., passes through ducts 1070, 1071, etc. and the air conditioning air passage 1063, and is blown out from the outlet 1050 in the living room 1020 and the outlet 1052 in the guest room 1022, etc. The conditioned return air passes through the return air ports 1085, 1086, etc., and returns to the entrance hall 1017, forming a circulating air passage (not shown) in the first floor 1004. The supply air passage and return air passage of the second floor 1005 are connected, and in the second floor 1005, the supply air, which is conditioned air mixed with the air blown out from the indoor unit 1016 of the air conditioner in the stairwell 1018 and the air in the stairwell 1018, is drawn in by a fan (not shown) from the intake port 1048, etc., passes through ducts 1072, 1073, etc. and the air conditioning air passage 1064, and is blown out from the outlet 1052 in the stairwell 1018, the outlet 1053 in the bedroom 1021, the outlet 1054 in the children's room 1023, etc. After conditioned air conditioning, the return air passes through the return air ports 1087, 1088, etc., and returns to the stairwell 1018, forming a circulating air passage (not shown) in the second floor 1005.

[0173] On the first floor (1004), a heat exchange unit (1095) is installed in the underfloor space (1010) that introduces outside air into the entrance hall (1017) and recovers the total heat from the indoor air into the outside air when the indoor air is discharged outside, thereby ventilating the first floor (1004) of the building (1003). On the second floor (1005), a heat exchange unit (1096) is installed in the inter-floor space (1062) that introduces outside air into the air conditioning duct (1064), mixes it with the conditioned air, introduces it into the stairwell (1018), etc., and recovers the total heat from the indoor air into the outside air when the indoor air is discharged outside, thereby ventilating the second floor (1005). In this embodiment, the total floor area of ​​building 1003 is 150 m². 2 In response to the heat exchange units 1095 and 1096, the 24-hour ventilation airflow is 100 m³. 3 / h, strong notch ventilation airflow 150m 3 At a rate of / h, the total heat exchange rate is approximately 70%. In the floors (not shown) of toilets 1100 and 1101 within building 1003, ventilation vents 1102 and 1103, such as exhaust grilles, are provided to exhaust the air from inside toilets 1100 and 1101, and are connected to heat exchange units 1095 and 1096. Outdoor exhaust hoods 1105 and 1106 are installed in penetration holes in the exterior wall of building 1003, and are connected to heat exchange units 1095 and 1096 by exhaust ducts 1107 and 1108. The heat exchange units 1095 and 1096 each include an introduction fan (not shown) for introducing outdoor air, an exhaust fan (not shown) for exhausting indoor air, a motor (not shown), and heat exchange elements 1110 and 1111 for recovering the total heat from the indoor air into the outdoor air. Furthermore, since the heat exchange units 1095 and 1096 are installed in contact with the floor (not shown) of the toilets 1100 and 1101, the heat exchange elements 1110 and 1111 and the pre-filters for the elements (not shown) can be easily cleaned and maintained from the floor of the toilets 1100 and 1101. As a result, the indoor air is exhausted through ventilation vents 1102 and 1103, with all the heat recovered by heat exchange units 1095 and 1096, and then exhausted outside through exhaust ducts 1107 and 1108 and outdoor exhaust hoods 1105 and 1106. The indoor air exhaust passages for the first floor 1004 and the second floor 1005 are formed between the ventilation exhaust ports 1102 and 1103 and the outdoor exhaust hoods 1106 and 1106, respectively, and are formed by heat exchange units 1095 and 1096 and exhaust ducts 1107 and 1108, respectively. The indoor air exhaust passages are equipped with exhaust fans for the heat exchange units 1095 and 1096, but other exhaust fans may be provided in addition to or in conjunction with the exhaust fans.

[0174] Outdoor air supply hoods 1115 and 1116 are installed in penetration holes in the exterior wall of building 1003, and are connected to heat exchange units 1095 and 1096 by air supply ducts A1117 and 1118. Filter boxes 1120 and 1121 are installed in the air supply ducts A1117 and 1118 so as to be in contact with the floors of toilets 1100 and 1101. The filter boxes 1120 and 1121 can be easily maintained, such as by cleaning the outdoor air purification filters (not shown) that purify the outdoor air introduced from the floor (not shown) of toilets 1100 and 1101. Air supply ducts B1130 and B1131 are connected to heat exchange units 1095 and B1096, respectively. Air supply duct B1130 is connected to a ventilation air inlet 1125 located in the floor 1024 of the entrance hall 1017, and blows outside air into the building 1003. Air supply duct B1131 is connected to an air conditioning air passage 1064 near the heat exchange unit 1096, and the outside air is mixed with conditioned air in the air conditioning air passage 1064 and blown into the building 1003 from outlets 1052, 1053, 1054, etc. As a result, outdoor air is introduced from outdoor air supply hoods 1115 and 1116, passes through air supply ducts A1117 and 1118, is purified in filter boxes 1120 and 1121, recovers total heat in heat exchange units 1095 and 1096, and is introduced into the room through air supply ducts B1130 and 1131, via ventilation inlets 1125, outlets 1052, 1053, 1054, etc. The outdoor air intake passage is formed between the outdoor air supply hoods 1115 and 1116 and the ventilation air inlets 1125, air outlets 1052, 1053, and 1054, and is comprised of air supply ducts A1117 and 1118, filter boxes 1120 and 1121, heat exchange air units 1095 and 1096, and air supply ducts B1130 and 1131, and the air conditioning air passage 1064. The outdoor air intake passage is provided with intake fans for the heat exchange air units 1095 and 1096, but other intake fans may be provided in addition to or together with the intake fans.

[0175] Toilets 1100 and 1101 do not have air outlets for supplying conditioned air. Instead, louvers 135 and 136 are provided between them and the entrance hall 1017 and the stairwell 1018, respectively, allowing air to enter and exit. When the heat exchange units 95 and 96 are in operation, some of the return air, which is the conditioned air that has returned to the entrance hall 17 and the stairwell 18, flows into toilets 1100 and 1101 through louvers 135 and 136. When the air conditioning environment is stable, the air quality (temperature, humidity, cleanliness, etc.) inside toilets 1100 and 1101 is close to that of the conditioned air. When heat exchange units 1095 and 1096 are operated, fresh outdoor air, purified by filter boxes 1120 and 1121 installed in the outdoor air intake path, is introduced by the intake fans of heat exchange ventilators 1095 and 1096. A portion of the return air, which is air-conditioned air from rooms and other areas, is then drawn from ventilation exhaust ports 1102 and 1103 through the indoor air exhaust path and into heat exchange units 1095 and 1096 by their exhaust fans. After heat exchange with the outdoor air using heat exchange elements 1110 and 1111, the air is discharged outside. This prevents dust and mold spores from entering the building 1003 from outside, and discharges moisture and odors from toilets and other areas to the outside. Through heat exchange, energy-saving ventilation of the building 1003 is achieved while reducing dust, moisture, and mold spores inside the building.

[0176] In this embodiment, ventilation exhaust ports 1102 and 1103 are provided in the toilets 1100 and 1101. However, ventilation exhaust ports and grilles may also be provided in other rooms or spaces that tend to generate and accumulate odors, moisture, harmful substances, etc., such as washrooms, bathrooms, and kitchens—so-called "dirty zones." In such cases, these substances can be discharged directly to the outside without passing through other rooms or spaces. However, if the heat exchange elements 1110 and 1111 of the heat exchange units 1095 and 1096 are not resistant to deterioration from moisture in bathrooms, oil in kitchens, etc., then a separate ventilation fan will need to be provided. Furthermore, ventilation exhaust vents 1102 and 1103 may be installed in rooms downstream of the circulation path (return air path), such as the entrance hall 1017 and the stairwell 1018. In this case, some of the indoor air from the room will be discharged outside along with dust and moisture generated by normal daily life in that room. However, to prevent moisture from the dirty zone from flowing into the room, it is necessary to install ventilation exhaust vents or another ventilation fan in the dirty zone.

[0177] The air conditioning capacity of the air conditioner in room 1004 on the first floor and the air conditioner in room 1005 on the second floor is determined by calculating the air conditioning load of the rooms to be air-conditioned and summing them up. In Embodiment 1, Building 3 has a floor area of ​​50 m² that is subject to air conditioning. 2 In contrast to ×2, the building 1003 in this embodiment has a floor area of ​​75m². 2 Because of the multiplier, the indoor air conditioner units 1015 and 1016 are basically the same as the indoor air conditioner units 15 and 17 of Embodiment 1, except that their cooling capacity is equivalent to 2.8 kW. The intake port 1049 has an airflow rate of 150 m³ from the blower in the outlet port 1054, compared to the intake port 42 in Embodiment 1. 3 They are basically the same except that they have a suitable suction area for drawing in / h. The air purification unit 1041 inside the intake port 1049 is also basically the same as the air purification unit 40 except for the suction area mentioned above. Eleven intake ports (intake port M, blower) 1042, 1043, 1048, each containing a blower (not shown), with an airflow rate of 150 m³. 3 The fan operates at a rate of 1100°C per hour, and each of the 11 intake ports has a suitable intake area for drawing in the airflow. The external dimensions of the intake louvers 1150 and other components are 330 mm square. Inside the fan, there is a DC motor (brushless DC motor) (not shown) and a sirocco fan (not shown) which are more energy-efficient than AC motors and allow for stepless control of the rotation speed over a wider range. When the airflow is set using a switch (not shown), the sirocco fan rotates to draw in air from the intake ports 1042 and other components. The drawn-in air flows through the ducts 1070 and other components and is ultimately blown out from the outlets 1050 and other components. Outlet 1050 and others: 150m 3The discharge area has a suitable airflow velocity for blowing air out from the floor at a rate of / h, and the discharge grille (not shown) has a discharge louver (not shown) that allows for variable direction of discharge in the left, right, front, and rear directions. The air conditioning system 1001 on the first floor 1004 has six intake vents 1042 and others, and six air outlets 1140 and others are installed in the living room 1020, guest room 1022, and four other rooms and spaces on the first floor 1004, corresponding to the six intake vents 1042 and others. The air conditioning system 1002 on the second floor (1005) has six intake vents 1048, 1049, etc., and the air outlets 1052, etc. are installed in the stairwell 1018, bedroom 1021, children's room 1023, and three other rooms and spaces on the second floor (1005), corresponding to the six intake vents 1048, 1049, etc. The amount of air to be supplied to each of the seven other rooms and spaces—living room 1020, guest room 1022, stairwell 1018, bedroom 1021, children's room 1023—is determined by the volume of each room or space. Then, the specifications and number of fans, the size and number of intake and exhaust ports, etc., are determined to ensure the total air supply obtained by adding up the air supply amounts for each room and space. The amount of air supply required for air conditioning is 2.5 m³ per room. 3 At least 10m per area 3 / h or more, ideally 20m 3 A rate of approximately / h is desirable, and the airflow rate should be adjusted according to the size of the room and the air conditioning load such as sunlight. In this embodiment, the average volume of rooms and spaces is approximately 32 m³. 3 The average airflow rate is 150 m³. 3 The specifications for the blower, intake, and outlet are determined so that the output is / h.

[0178] Figure 31 is a cross-sectional view showing the airflow in the entrance hall when heating is in place, and Figure 32 is a cross-sectional view showing the airflow in the entrance hall when heating is in place. As shown in the diagram, the indoor air conditioner unit (air conditioner) 1015 that constitutes this air conditioning system 1001 is installed in the entrance hall 1017 (space A) on the first floor 1004. The height of the entrance hall room 1017 is approximately 2.4m, and the indoor air conditioner unit (HVAC unit) 1015 is installed so that the height of its air outlet 1140 is approximately 2m. Three air intakes 1042 and others are installed horizontally at a height of approximately 1.5m or less, below the wall 1033 where the indoor unit 1015 of the air conditioner is installed, and below that, three air intakes 1043 and others are installed horizontally on a wall 1035 that protrudes slightly forward. Three ducts 1070 and others connected to the three air intakes 1042 and others are routed downwards so as not to hit the three air intakes 1043 and others below, and the three air intakes 1043 and others are installed slightly forward. Six intake ports 1042, 1043, etc. are installed with six intake louvers 1150, 1151, etc. exposed from the walls 1033, 1035 towards the room, while six main units 1152, 1153, etc. are installed concealed within the wall space 1075 and connected to six ducts 1070, 1071, etc. The front panel 1055 is fixed to the wall 1033 with a mounting plate 1058, with a greater distance from the wall than the depth of the indoor unit 1015 of the air conditioner. However, the front panel 1055 can be easily removed so that maintenance such as cleaning the intake port 1042 and other parts can be performed from the front.

[0179] In the above configuration, the case of heating operation will be explained for the entrance hall 1017, living room 1020, guest room 1022, and four other rooms / spaces on the first floor 1004. This is because, in Embodiment 1, since the intake port 142 (intake port C) is located below the air conditioner indoor unit 15 (air conditioner), when the air conditioner indoor unit 15 is operated in heating mode, if the temperature of the discharged airflow is high, the air density is low, and depending on the set airflow rate and the set angle of the air direction louver 145, the discharged airflow may not be directed towards the intake port 142, and the temperature of the intake airflow drawn into the intake port 142 may be lower than the target temperature, potentially preventing the living room 20 and other rooms from being adequately heated. However, this embodiment solves that problem. Regarding cooling operation, since the temperature of the discharged airflow from the air conditioner indoor unit 15 is low, the air density is high, and the discharged airflow is likely to be directed towards the intake port 142, so the explanation will be omitted. When you want to heat the entrance hall 1017, living room 1020, guest room 1022, and four other rooms / spaces, for example, if the room temperature in the entrance hall 1017, living room 1020, and other spaces is approximately 16°C, to start heating up the many rooms / spaces on the first floor 1004, set the indoor unit of the air conditioner 1015 to a relatively high temperature of 24°C using the remote control (not shown), and set the fan speed to high at approximately 10m 3 / min(600m 3 Continue heating operation at 1 / h. Then, set the angle of the airflow louvers 1145 to adjust the angle of the discharged airflow 1170 to "60° diagonally forward". Use the switch (not shown) of the blower (not shown) to set the airflow rate of the blower (not shown), which has six intake ports 1042, 1043, etc., to high at 150m 3 When operated at / h, the total airflow volume drawn into the intake port 1042 located below the indoor unit 1015 of the air conditioner is 900 m³. 3 A suction airflow of 1171 at / h is generated. The air intake temperature of 16°C, drawn in from the intake port 1142 of the indoor unit 1015 of the air conditioner, is detected by an intake air temperature sensor (not shown) and, based on the remote control set temperature of 24°C and the set airflow volume (high), the inverter drive frequency of the compressor (not shown) of the outdoor unit (not shown) of the air conditioner is driven at a high frequency, controlling the electric expansion valve (not shown) and the outdoor blower (not shown), etc., to adjust the enthalpy and circulation amount of the refrigerant flowing into the heat exchanger (not shown) of the indoor unit 1015 of the air conditioner, thereby increasing the heating capacity of the air conditioner on the first floor and adjusting the temperature of the discharged airflow 1170 of the indoor unit 1015 to approximately 32°C.

[0180] By adjusting the louver section 1057 at the top of the front panel 1055 to a 60° angle forward, approximately 15% of the discharged airflow 1170 passes through the louver section 1057, resulting in a temperature of 32°C and a length of 90m. 3 The airflow is set to a rate of 1172 / h, heating the entrance hall 1017 and raising the temperature from 16°C to 20°C. Then, approximately 85% of the remaining outflow 1170 hits the front plate 1055, resulting in a temperature of 32°C and a flow rate of 510 m. 3 The airflow becomes a discharge stream 1173 at / h and heads towards the intake port 1042 and other ports. A blower (not shown) draws in air from around the front panel 1055 towards the intake ports 1042 and others. This air mixes with the conditioned air that has returned to the entrance hall 1017 from the return air port 1086 and other ports, the discharge airflow 1172, and the outside air introduced into the room from the ventilation air supply port 1125, for approximately 900 m 3 The intake airflow 1174 at / h collides with the discharge airflow 1173 and mixes in the mixing section 1180 between the front plate 1055 and the intake port 1042, etc., resulting in mixed air at approximately 28°C, which then flows for 900m. 3 As an intake airflow of / h, it is drawn into six intake ports 1042 and others, and then drawn into intake port 1043 at approximately 28°C and 150m 3 The conditioned air at / h passes through duct 1071 and is blown into the guest room 1022 from outlet 1051, heating the room temperature from 16°C to 20°C. Approximately 28°C, 750m³ of air is drawn into the five intake ports 1042, excluding intake port 1043 on the first floor. 3 The air-conditioned air at / h passes through five ducts 1070 and others, pressurizes the underfloor space 1010 which is an air conditioning air passage 1063, and is blown out from five outlets 1050 and others, heating the living room 1020 and four other rooms, raising the temperature to 16°C to 20°C. Because the blower (not shown) is a sirocco fan, it is resistant to pressure, and the conditioned air blown out from the five ducts 1070 and others is first evenly pressurized around the underfloor space 1010. Therefore, as long as the outlet 1051 is not far from the intake and the cross-sectional area of ​​the underfloor space 1010 with respect to the direction of airflow does not decrease along the way, the air will be blown out from the five outlets 1050 and others at roughly the same volume. To raise the temperature of the entrance hall 1017, living room 1020, guest room 1022, and all four other rooms above 20°C, use the remote control (not shown) to further increase the temperature of the indoor air conditioner unit 1015 to 26°C and set the fan speed to high at approximately 10m 3 / min(600m 3 With heating operation at 150 m³ / h, the airflow rate of the fan (not shown) is set to high. 3 Operate at / h. To lower the temperature below 20℃, set the indoor unit 1015 of the air conditioner to a lower temperature of 22℃ using the remote control (not shown), or set the fan speed to medium at approximately 7m 3 / min(420m 3Set the fan (not shown) to 125 m³ / h and the airflow rate of the blower (not shown) to 125 m³ / h. 3 Drive at / h By changing the angle of the louver section 1057 at the top of the front panel 1055, the amount of airflow 1170 passing through the louver section 1057 changes, and the outlet angle of the airflow 1172 also changes, so the heating capacity of the entrance hall 1017 and the temperature distribution also change. If the louver section 1057 is closed at an angle of 90 degrees, most of the discharged airflow 1170 will hit the front panel 1055, becoming the discharged airflow 1173, which will hardly heat the entrance hall 1017, while increasing the heating capacity of the living room 1020, guest room 1022, and the four other rooms and spaces. In this embodiment, within the building 1003, the guest room 1022 (space B) is far from the entrance hall 1017 (space A) where the air conditioner indoor unit 1015 is installed, and the return air path is long, which may result in a reduced airflow. Therefore, the intake port 1042 and the outlet port 1051 are directly connected by a duct 1071, and the air is blown out directly to ensure sufficient airflow. On the other hand, if the intake (blower) and outlet are directly connected by a duct, the ON / OFF and airflow settings of each blower can be varied using the switches on each blower, allowing for variable ON / OFF and strength control of the air conditioning in the room or space where the outlet is installed. For example, setting the switch of the blower (not shown) inside the intake 1043 to an airflow of 100 m³ 3 Setting it to / h will reduce the heating in room 1022, stabilizing it at approximately 18°C. Setting it to OFF will keep it at approximately 16°C. Therefore, except when directly connecting the air outlet and intake with ducts in locations where the airflow may be low due to distance, in rooms where people are rarely present, rooms without windows, or small rooms, or conversely, in rooms where people are always present, rooms with large windows, or large rooms, where the air conditioning load of a room is lower or higher than that of other rooms, by directly connecting the intake and outlet with ducts and adjusting the airflow with switches to decrease or increase the airflow, the heating capacity of that room can be reduced or increased, and the set temperature can be lowered or raised, resulting in energy savings and comfort.

[0181] Next, we will explain the heating operation for the stairwell 1018, bedroom 1021, children's room 1023, and four other rooms / spaces on the second floor (1005). However, we will omit the explanation for the entrance hall 1017, living room 1020, guest room 1022, and four other rooms / spaces, as this is the same as the heating operation explanation mentioned earlier. Figure 33 is a cross-sectional view showing the airflow in a stairwell during heating, and Figure 34 is a cross-sectional view showing the airflow in a stairwell during heating. As shown in the diagram, the indoor air conditioner unit (air conditioner) 1016 that constitutes this air conditioning system 1002 is installed in the stairwell 1018 (space A) on the second floor 1005. The height of the stairwell room 1018 is approximately 2.4m, and the indoor air conditioner unit (air conditioning unit) 1016 is installed so that the height of its air outlet 1141 is approximately 2m. Three intake ports 1048 and others are installed horizontally at a height of approximately 1.5m or less, below the wall 1034 where the indoor unit 1016 of the air conditioner is installed, and above the left-right center. Below that, on a wall 1036 that protrudes slightly forward, three intake ports 1049 and two intake ports 1048 are installed horizontally. Three ducts 1072 and others connected to the three intake ports 1048 and others are routed downwards so as not to hit the intake ports 1049 and the two intake ports 1048 below, and the intake ports 1049 and the two intake ports 1048 are installed slightly forward. Five intake ports 1048, 1049, and others are installed with intake louvers (not shown) exposed from the walls 1034 and 1036 towards the room, while the main unit (not shown) is installed concealed within the wall space 1080 and connected to six ducts 1072, 1073, and others. The front panel 1056 is fixed to the wall 1034 with a mounting plate, with a greater distance from the wall than the depth of the indoor unit 1016 of the air conditioner. However, the front panel 1056 can be easily removed so that maintenance such as cleaning the intake port 1048 and other parts can be performed from the front.

[0182] In the above configuration, when you want to heat the stairwell 1018, bedroom 1021, children's room 1023, and four other rooms / spaces, for example, if the room temperature in the stairwell 1018, bedroom 1021, and the other rooms is approximately 16°C, then to start heating up the many rooms on the second floor 1005, set the indoor unit 1016 of the air conditioner to a relatively high temperature of 24°C using the remote control (not shown), and set the fan speed to high at approximately 10m 3 / min(600m 3 Continue heating operation at 1 / h. Then, set the angle of the airflow louvers 1146 to adjust the angle of the discharged airflow 1175 from "60° diagonally forward" to "15° (105°) vertically downward toward the wall". Use the switches (not shown) of the five fans (not shown) in the intake ports 1048 and the fans (not shown) in the outlet ports 1054 to set the airflow rate of those fans (not shown) to high at 150m 3 When operated at / h, the total airflow volume drawn into the intake port 1048 located below the indoor unit 1016 of the air conditioner is 900 m³. 3 A suction airflow of 1176 at / h is generated. The air intake temperature of 16°C, drawn in from the intake port 1143 of the indoor unit 1016 of the air conditioner, is detected by an intake air temperature sensor (not shown). Based on this intake air temperature of 16°C, the remote control set temperature of 24°C, and the set airflow rate (high), the inverter drive frequency of the compressor (not shown) of the outdoor unit (not shown) of the air conditioner is driven at a high frequency. This controls the electric expansion valve (not shown) and the outdoor blower (not shown), etc., to adjust the enthalpy and circulation rate of the refrigerant flowing into the heat exchanger (not shown) of the indoor unit 1016 of the air conditioner, thereby increasing the heating capacity of the air conditioner on the second floor and adjusting the temperature of the discharged airflow 1175 of the indoor unit 1016 to approximately 32°C.

[0183] The discharged airflow 1175 hits the front plate 1056, at 32°C and 600m. 3 The airflow becomes a discharge stream 1177 at / h and heads towards the intake port 1048 and other ports. A blower (not shown) draws in air from around the front panel 1056 towards the intake port 1048 and other ports. This air mixes with the conditioned air returning from the return port 1088 and other ports to the stairwell 1018, and the conditioned air being blown out from the outlet 1052. The mixture is then drawn in for approximately 900 m 3The intake airflow 1178 at / h collides with the dis...

Claims

1. Space K is provided above space A within a highly airtight and well-insulated building. An air conditioner and an intake port L are provided in the aforementioned space K. An opening is provided below the aforementioned space K that connects to the aforementioned space A. An outlet is provided in space B. Between space A and space B, a return air section is provided that forms a return air passage from space B toward space A. The intake port L, the blower, and the outlet port are connected by an air supply path. The blower blows out the air drawn in at the intake port L from the outlet. The intake port L is provided below the air conditioner. The temperature and airflow of the air conditioner are adjusted based on the temperature of space A, the operating mode of the air conditioner, the set temperature, and the airflow setting. The angle of the airflow from the air conditioner is adjusted by setting the air direction louvers of the air conditioner. By adjusting the airflow rate of the blower, An air conditioning system characterized in that the temperature of the air drawn in through the intake port L can be adjusted to within 20K during heating and within 10K during cooling, relative to the temperature of the space A.

2. The air conditioning system according to claim 1, characterized in that an electrostatic precipitator or HEPA filter for purifying the air drawn in by the intake port L is provided so as to be removable from the front of the intake port L.

3. The air conditioning system according to claim 1 or 2, characterized in that a return air blower is provided in the return air passage instead of the return air section.

4. A heat exchange unit is installed in the outdoor air intake path connecting the outside and the inside of the building. The heat exchange unit is installed in the indoor air exhaust passage connecting the inside of the building and the outside. The air conditioning system according to claim 1 or 2, characterized in that the heat exchange unit discharges indoor air to the outside while introducing outdoor air into the building, and heat exchanges between the indoor air and the outdoor air.

5. An air conditioner and intake vent M are installed in space A within a highly airtight and well-insulated building. An air outlet is provided in space B. Between space A and space B, a return air section is provided that forms a return air passage from space B toward space A. The intake port M, the blower, and the outlet are connected by an air conditioning air passage. The blower blows out the air drawn in at the intake port M from the outlet. The intake port M is provided below the air conditioner. A front plate is provided in front of the air conditioner and the intake port M, and the front plate causes a portion of the airflow from the air conditioner to be drawn into the intake port M. The temperature and airflow of the air conditioner are adjusted based on the temperature of space A, the operating mode of the air conditioner, the set temperature, and the airflow setting. The angle of the airflow from the air conditioner is adjusted by setting the air direction louvers of the air conditioner. By adjusting the airflow rate of the blower, An air conditioning system characterized in that the temperature of the air drawn in through the intake port M can be adjusted to within 20K during heating and within 10K during cooling, relative to the temperature of the space A.

6. A space P is provided below space A within a highly airtight and well-insulated building. An air conditioner and an intake port N are provided in the aforementioned space P. An air outlet is provided in space B. Between space A and space B, a return air section is provided that forms a return air passage from space B toward space A. The intake port N, the blower, and the outlet are connected by an air conditioning air passage. By pressurizing the aforementioned air conditioning duct with the blower, The air drawn in at the intake port N is blown out from the outlet. The temperature and airflow of the air conditioner are adjusted based on the temperature of space A, the operating mode of the air conditioner, the set temperature, and the airflow setting. The angle of the airflow from the air conditioner is adjusted by setting the air direction louvers of the air conditioner. By adjusting the airflow rate of the blower, An air conditioning system characterized in that the temperature of the air drawn in through the intake port N can be adjusted to within 20K during heating and within 10K during cooling, relative to the temperature of the space A.

7. The air conditioning system according to claim 5 or 6, characterized in that the air conditioning air passage is a duct or an airtight space within the building consisting of at least one of the inter-floor, underfloor, or attic spaces.

8. The air conditioning system according to claim 5 or 6, characterized in that outdoor air is introduced into the return air passage or the air conditioning air passage.

9. The air conditioning system according to claim 5 or 6, characterized in that the air conditioning duct is an airtight space within the building, at least one of the inter-floor space, under the floor, or in the attic, and outside air is introduced into the air conditioning duct by pressurizing it with an outdoor air introduction fan.

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