Air conditioning and ventilation system

Abstract

To provide an air-conditioning and ventilation system that does not require maintenance such as cleaning of air-conditioning air ducts, since harmful substances such as dust, mold and malodor do not attach to, accumulate in, or condense within the air-conditioning air ducts, even if 24-hour operation is continued for a long period.SOLUTION: An air-conditioning unit 10 and air outlets 40, 41, 42 are connected by an air-conditioning air duct A 30 and an air-conditioning air duct B 31. Each of the air-conditioning air ducts is surrounded by at least any one of a room, a space and an insulating material between the air-conditioning air duct and the external skin of a building 2. Air-conditioning air at a difference of 5K or less during cooling and 10K or less during heating relative to the air around the air-conditioning air ducts is blown within the air-conditioning air ducts from the air-conditioning unit 10 towards the air outlets, thereby air-conditioning the room and space. Filter units A, B, C are provided inside the air-conditioning unit 10 and clean the air inside the building 2. An introduction fan and a filter 69 are provided in an external air introduction duct and clean external air being introduced. An exhaust fan is provided in an indoor air discharge duct to discharge, to the outside, some of the air that has passed through the air-conditioning air ducts and some of the air that has accumulated inside the building 2.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] This invention relates to an air conditioning and ventilation system that provides air conditioning and ventilation for the entire interior of a building. [Background technology]

[0002] Buildings are becoming increasingly airtight and well-insulated to achieve energy efficiency and comfortable living. In such houses and non-residential buildings, ducted air conditioning and ventilation systems are widely used, which run ducts throughout the building to distribute conditioned and ventilated air from air conditioners to rooms and spaces. However, some buildings are adopting air conditioning and ventilation systems that use underfloor spaces, attic spaces, and inter-floor spaces as ventilation channels instead of ducts to provide thorough air conditioning and ventilation throughout the building. Such air conditioning and ventilation systems do not require ductwork, resulting in cost savings on duct materials and installation. Instead of ducts, underfloor spaces and other areas can be used as ventilation channels, utilizing existing building space and eliminating the need for ductwork, making them rational. However, because the conditioned and ventilated air is blown into rooms through underfloor spaces and other ventilation channels, over time, dust from inside and outside the building, house dust, human and pet dander, mites, mite feces and carcasses, VOCs, mold, and other allergens accumulate inside these ventilation channels. Furthermore, in a typical air conditioner, for example, one with a cooling capacity of around 4kW, the temperature of the air blown out from the air conditioner is about 5K to 15K lower than the intake air temperature during cooling, and about 10K to 30K higher during heating, with an airflow of approximately 400 to 800 m³. 3 When conditioned air at a rate of / h passes through a ventilation duct, the temperature gradient within the duct is large, and condensation is likely to occur inside and outside the duct due to the temperature difference. Furthermore, if there are multiple outlets in the ventilation duct, the outlets closer to the air conditioner have more capacity, while those further away have less capacity, resulting in an uneven temperature distribution within the building depending on the location of the outlets. In particular, the inside of such ventilation passages has all the conditions for mold growth: "temperatures of around 5-40°C," "moisture due to high humidity of 60% or more," and "nutrients such as accumulated dust and dirt." Due to the temperature difference between the inside and outside of the ventilation passage, condensation forms on the accumulated dust and other materials inside the passage, as well as on the metal, wood, and insulation materials that make up the passage, making it easy for mold and mites to breed. As conditioned air passes through this area, dust, mold, bacteria, and unpleasant odors can accumulate in the air. This can lead to health problems for those who inhale these contaminated air particles, such as respiratory illnesses, skin problems, and allergies, as well as discomfort due to the odors. Furthermore, if the ventilation channel has poor insulation and the area surrounding it is not an insulated space, condensation can form on the outer perimeter of the ventilation channel. This condensation can wet the surrounding wood and other materials, leading to mold growth, visible stains in living spaces, rot causing structural damage, and even electrical short circuits if the condensation runs down to power lines. If glass wool insulation is installed inside the ventilation duct to prevent condensation, moisture will seep into the gaps between the fibers due to its surface tension and capillary action. Even after drying, the fibers will stick together, preventing them from retaining the large amount of air necessary for insulation, thus reducing the insulation function. Once condensation occurs inside the ventilation duct, it becomes even more prone to condensation, leading to reduced air conditioning efficiency and increased power consumption. Regarding condensation, for example, during cooling operation, when the air conditioner's compressor is running and the thermostat is ON, the cold blown air passes through the air duct, cooling the inner surface of the air duct to, for example, 10°C. When the thermostat is turned OFF, the compressor stops, and indoor air is drawn in. As a result, the blown air, which has become highly humid due to the condensed water that has formed on the evaporator at the indoor air temperature, passes through the air duct. If the temperature and humidity of that air is 25°C and 80% (dew point temperature 21°C), condensation will form on the inner surface of the air duct. Furthermore, if the ventilation passage does not pass through an insulated space within the house, and the insulation performance of the ventilation passage is poor, in the summer, the temperature and humidity of that space will be close to the outside temperature. For example, if the outside temperature is 35°C, the space temperature is 30°C, and the relative humidity is 50% (dew point temperature 18.4°C), when the air conditioner is running, the cold blown air passes through the ventilation passage, and when the temperature of the outer surface of the ventilation passage falls below the dew point temperature, condensation will form on the outer surface of the ventilation passage. Furthermore, in winter, the temperature of the space is close to the outside temperature. For example, if the outside temperature is 0°C and the space temperature is 2°C, when the heating is running and the compressor is operating with the thermostat ON, the warm air blown out (temperature and humidity 50°C, 11% (dew point temperature 12°C)) passes through the air duct, and when the temperature of the inner surface of the air duct falls below the dew point temperature, condensation will form on the inner surface of the air duct. Moreover, when the thermostat is turned OFF and the compressor stops, and indoor air is drawn in, the temperature and humidity of the indoor air passes through the air duct, and when the temperature and humidity of that air is 20°C, 60% (dew point temperature 12°C), and the temperature of the inner surface of the air duct falls below the dew point temperature, condensation will form on the inner surface of the air duct. In winter, if the room is humidified with a humidifier to prevent excessive dryness, condensation will be even more likely to occur. Therefore, it is necessary to regularly clean the inside of ventilation passages such as underfloor spaces. However, since ventilation passages usually need to be airtight, there are often no inspection hatches, and it is necessary to remove surrounding floorboards, etc., but it is difficult to even confirm where the ventilation passage is being used. Furthermore, even if there is an inspection hatch, cleaning the inside of the ventilation passage may not be possible due to the shape and structure of the passage. For example, if there are beams or joists inside, they may get in the way and make cleaning difficult, and dust, mites, mold, etc. may adhere to them and become impossible to remove. Therefore, even if it were possible to clean the ventilation ducts, it would be extremely time-consuming and costly. Furthermore, if space were to be allocated to facilitate maintenance and cleaning of the ventilation ducts, the living space would be significantly reduced. Conventionally, air-conveying air conditioning systems for each room have been known to include a chamber structure in the ceiling space with added airtightness, multiple indoor discharge ports connecting the ceiling space to the room, a box-shaped main body having a ceiling space outlet and an indoor intake port that communicate with the ceiling space, a blower installed inside the main body that draws air in from the indoor intake port and blows it out from the ceiling outlet, and a cooling heat exchanger and a heating heat exchanger installed in the air passage formed by the blower, with the cooling heat exchanger and heating heat exchanger arranged side by side on approximately the same plane so as to divide the air passage into two, and by directly drawing indoor air into the heating heat exchanger for reheating and flowing a small amount of air, the latent heat capacity is increased and the sensible heat capacity is reduced, and dry cold air and cold / hot air are blown into the ceiling space, so that air-conveying air conditioning can be reliably supplied to each room without condensation even if there are beams in the ceiling space or the ceiling space itself is narrow (see, for example, Patent Document 1). Furthermore, in a whole-house air conditioning system, the space above the ceiling between the ceiling of the first-floor living room and the floor of the second-floor living room is used as the air supply path, and multiple air conditioners are arranged within this space above the ceiling. Multiple air outlets are provided in the ceiling of the first-floor living room and in the floor of the second-floor living room, and each of the multiple air outlets is equipped with a booster fan that can be independently turned ON / OFF and has adjustable rotation speed. This whole-house air conditioning system combines air conditioning and ventilation functions, is easy to install, and does not require duct maintenance (see, for example, Patent Document 2). Furthermore, in building units and buildings, staircase air conditioning units are known to include air conditioning equipment and an outlet for the air conditioning equipment, the outlet opening into the ceiling cavity between two floors of the building, so that the conditioned and heated air from the air conditioner of the staircase air conditioning unit and the outdoor air from the heat exchanger enter the ceiling cavity between the floors of the building, and are blown out from the ceiling of the first floor and the floor of the second floor to provide air conditioning and ventilation (see, for example, Patent Document 3). In addition, in a duct for blowing air and a blowing system for ventilation and air conditioning in a house, a coating film containing charcoal powder is formed on the inner surface of the duct, and the inlet and outlet of air and the blowing device are connected by this duct to constitute a blowing system for a house, suppressing the generation of mold and bad odors in the duct by charcoal powder, and also removing the odors contained in the air so as to obtain a comfortable housing environment (see, for example, Patent Document 4).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the air conveyance type air conditioner described in Patent Document 1, since air-conditioned air cannot flow outside the ceiling space, for example, in the case where the airtightness and heat insulation of the entire building are low or in the case of a building with ceiling insulation, there are cases where it cannot be dealt with due to the building structure, and even if it can be dealt with, since it air-conditions with air having reduced sensible heat capacity, at the start of operation, when introducing outdoor air, or when the air-conditioning load increases due to bathing, etc., there is a problem that the sensible heat capacity is insufficient and the temperature and humidity do not stabilize or it takes time to stabilize. In addition, there is a possibility that dust, etc. may accumulate in the chamber in the ceiling space, and it is difficult to maintain, and there is a problem that it is difficult to keep the inside of the building clean including the ceiling space. Furthermore, the whole-building air conditioning system described in Patent Document 2 uses the space above the ceiling between floors as an air supply path. This leads to problems such as condensation and dust intrusion, causing dust to accumulate in the space above the ceiling between floors, resulting in an unsanitary environment where mold can grow, and making cleaning and other maintenance difficult. Furthermore, a large space was required in the ceiling space between floors to install the air conditioners, which reduced living space and made it difficult to efficiently return the air from each room to the air conditioners. Furthermore, in the building unit and building described in Patent Document 3, the blown air from the air conditioner and the outdoor air from the heat exchanger enter directly into the ceiling cavity between floors, which presents the problem of condensation forming inside the ceiling cavity, on the floor, and on the ceiling, as well as the possibility of dust and other debris accumulating. Furthermore, because the return airflow from the building is unclear, there was a problem that the air conditioning load and ventilation load could increase, potentially leading to higher power consumption for air conditioners and ventilation equipment. Furthermore, in the ventilation duct and ventilation system described in Patent Document 4, dust, bacteria, etc., accumulate on the surface of the paint coating containing charcoal powder inside the duct, and if condensation occurs, it is not possible to prevent the growth of mold, etc., and it is necessary to paint the inside of the duct or ventilation passage, which has problems with mass production and workability.

[0005] The present invention aims to solve these conventional problems and provide an air conditioning and ventilation system that can accommodate various building layouts and shapes, uses highly versatile equipment, utilizes existing spaces in a building as air conditioning ducts, prevents condensation inside the ducts, prevents the accumulation of dust and other debris inside the ducts, suppresses the growth of mold and other microorganisms, and appropriately air-conditions and ventilates rooms and spaces in response to changes in load such as outside temperature, thereby providing an energy-saving air conditioning and ventilation system that can create a healthy space with a uniform temperature, good air quality, and consistently clean air throughout the building. Furthermore, with a relatively simple equipment configuration, it operates 24 hours a day, maintaining a stable state while suppressing condensation in the airflow path. This eliminates control delays and utilizes controllers and sensors to adjust to the room temperature set by the user, while simultaneously preventing condensation. The aim is to provide an energy-saving, comfortable, and healthy air conditioning and ventilation system that is stably realized through automatic control. Furthermore, the aim is to provide an air conditioning and ventilation system that, even with prolonged operation, is less prone to the accumulation of harmful substances such as dust, mold, and unpleasant odors in the air conditioning ducts, thus eliminating the need for maintenance such as cleaning the ducts. [Means for solving the problem]

[0006] To achieve the above objectives, the air conditioning and ventilation system of the present invention provides air outlets in rooms and spaces within a highly airtight and highly insulated building, connects an air conditioning unit provided within the building to the air outlets with an air conditioning air passage, the air conditioning air passage is an airtight housing, and at least one of the rooms, spaces, or insulating material is provided around the air conditioning air passage between it and the building envelope, the air conditioning unit produces purified conditioned air, the purified conditioned air flows from the air conditioning unit to the air outlets, and a circulation path is provided to return the air from the rooms and spaces where the air outlets are provided to the air conditioning unit, the air conditioning unit has an intake section, an air conditioning section, and a blower section arranged in order from upstream to downstream of the circulation path, the intake section, the air conditioning section, and the blower section are each provided with a filter section A, a filter section B, and a filter section C, respectively, and the air drawn in from the intake section through the circulation path is purified by the filter section A, and the air is purified. The conditioned air is conditioned and purified by the conditioned section and the filter section B, producing conditioned air at a temperature of 5K or less during cooling and 10K or less during heating relative to the temperature of the air surrounding the conditioned air passage. The air blower section and the filter section C further purify the conditioned air, and the purified conditioned air is blown into the conditioned air passage toward the outlet, thereby conditioned and purifying the room and the space through the circulation path. An outdoor air introduction path is provided to introduce outdoor air from outside into the circulation path or the conditioned unit. An introduction fan and filter are provided in the outdoor air introduction path to purify the introduced outdoor air. An indoor air discharge path is provided to discharge the air inside the building to the outside from at least one of the circulation path, the room without an outlet, or the space without an outlet. An exhaust fan is provided in the indoor air discharge path to discharge at least one of the air in the circulation path or the air remaining inside the building to the outside. This method involves an air conditioning unit equipped with an intake, air conditioning, and blower section, which generates conditioned air at a temperature of 5K or less during cooling and 10K or less during heating. This conditioned air is then blown into the air conditioning duct at a high volume, and discharged from the vents in rooms and spaces. As a result, the rooms and upper and lower spaces within a highly airtight and well-insulated building are air-conditioned, making it easier to achieve a comfortable and uniform temperature and humidity throughout the building, including spaces with high air conditioning loads such as solar radiation. Furthermore, because the air conditioning duct is surrounded by air-conditioned rooms, spaces, or insulating materials, condensation inside and outside the air conditioning duct during cooling, and condensation inside the air conditioning duct during heating, are less likely to occur, resulting in an air conditioning and ventilation system with minimal condensation. Furthermore, a return air filter (filter section A) installed in the intake of the air conditioning unit that produces conditioned air purifies all the air drawn into the air conditioning unit. The air drawn into the air conditioning unit is further purified by the air conditioning unit filter (filter section B), and all the air drawn into the air conditioning unit is thoroughly purified by the air blower filters (filter section C) of multiple blower units, before flowing into the air conditioning duct, purifying the air inside the building. This further reduces the risk of dust and other particles, which are one of the conditions for mold growth, entering the air conditioning duct. Since all filter sections A, B, and C are located inside the air conditioning unit, an air conditioning and ventilation system that is easy to maintain, such as cleaning, is obtained. Furthermore, by installing an intake fan and filter in the outdoor air intake path to purify the incoming outdoor air, and by using an exhaust fan to expel some of the conditioned air from the room and space, along with the air from the dirty zone, to the outside from an indoor air exhaust path that leads from so-called dirty zones (toilets, washrooms, etc.) without an outlet, an air conditioning and ventilation system is obtained that can introduce purified outdoor air and ventilate the building while expelling the air inside the building that is contaminated with dust and moisture. Furthermore, by installing exhaust fans to expel moisture from areas such as bathrooms and kitchens—where moisture is generated not by human activity but also by bathing and cooking—into the outside, this moisture does not accumulate inside the building and is not included in the conditioned air, thus preventing it from flowing into the air conditioning ducts. As a result, dust, moisture, and condensation do not accumulate or stagnate in the air conditioning ducts, making it difficult for mold to grow and for odors caused by bacteria to develop. This prevents dust, mold, bacteria, and unpleasant odors from entering the building, creating a healthy and comfortable space. Furthermore, even after long-term use, maintenance such as cleaning the air conditioning ducts is unnecessary, resulting in an air conditioning and ventilation system that can always provide healthy and comfortable air conditioning and ventilation within the building. Another method involves providing a mixing section between the air conditioning unit and the multiple blowing sections within the air conditioning unit, so that the blown-out air from the air conditioning unit and the remaining portion of the air drawn in from the intake section are mixed by the multiple blowing sections in the mixing section located upstream of the filter section C to produce the purified conditioned air, and the total airflow from the multiple blowing sections is greater than the airflow from the air conditioning unit, and the airflow from the blowing sections is not zero. This method allows a portion of the air drawn in from the intake to be drawn into the air conditioning unit by the air blower, conditioned, and then blown out. Alternatively, some of the air drawn in from the intake is not drawn into the air conditioning unit but merges with the blown air from the air conditioning unit in the mixing section, where they are mixed. By adjusting the airflow of the air conditioning unit, the set temperature, and the airflow of the air blower, it is possible to create a large volume of conditioned air within 5K during cooling and within 10K during heating, relative to the temperature of the air surrounding the air conditioning duct, in an energy-efficient and stable manner. Since this conditioned air is passed through the air conditioning duct, an air conditioning ventilation system is obtained that is less prone to condensation in the air conditioning duct. Furthermore, the airflow from the fan unit is significantly greater than that from the air conditioning unit. This allows for the stable and energy-efficient production of large volumes of conditioned air, within 5K during cooling and within 10K during heating, relative to the room and space temperature. As a result, the room and space temperatures do not fluctuate significantly, such as overshooting. The temperature of the intake air from the air conditioning unit remains stable for extended periods, close to the set temperature. Especially during cooling operation in summer, the air conditioning unit maintains a thermostat-ON state with a small temperature difference for extended periods, and the compressor operates continuously at a low frequency. This causes the surface temperature of the evaporator, the so-called evaporation temperature, to fall below the dew point temperature of the intake air. Condensation of moisture from the intake air occurs on the evaporator, and the amount of dehumidification removed over extended periods increases. This leads to a continuous decrease in the absolute humidity of the discharged air, and consequently, a decrease in the absolute humidity of the conditioned air. This also reduces the relative humidity in the air conditioning ducts, rooms, and spaces through which the conditioned air flows, resulting in an air conditioning and ventilation system that is even less prone to condensation in the air conditioning ducts during cooling operation. Furthermore, the airflow from the ventilation unit is not zero; it is designed to continuously circulate conditioned air, so even if condensation forms inside the conditioned air duct, it can be evaporated as quickly as possible. Furthermore, by driving the compressor and other components of the air conditioning unit, the system is energy-efficient because it uses a larger airflow from the fan unit (which has significantly lower running costs per unit of airflow) than the airflow from the air conditioning unit (which has higher running costs per unit of airflow) to create conditioned air and pass it through the air conditioning duct. Other means include directly connecting the air blower unit to the air conditioning air duct, directly connecting the air conditioning air duct to the outlet, and installing the air conditioning air duct between the upper and lower floors of the building. This method allows the air conditioning duct, through which the conditioned air flows, to be installed in the space between the first and second floors, which are typically structurally partitioned in houses with two or more stories. Since the upper and lower surfaces, which occupy a large portion of the surface area of ​​the air conditioning duct, are surrounded by air-conditioned rooms and spaces, there is no need to enclose it with insulation. Furthermore, the front, back, left, and right sides are surrounded by insulation materials installed in the exterior walls, making condensation in the air conditioning duct even less likely to occur. This results in a highly efficient air conditioning and ventilation system with minimal heat loss from the inlet to the outlet of the conditioned air in the air conditioning duct. Furthermore, for example, by installing an air conditioning unit on the upper floor between floors and directly connecting it to the air conditioning duct installed between floors, and providing an outlet at the point where the air conditioning duct connects to the floor of the upper floor, and also providing an outlet at the point where the air conditioning duct connects to the ceiling of the lower floor, and blowing conditioned air into the room or space from the floor of the upper floor and the ceiling of the lower floor, the air duct from the air conditioning unit to the outlet is the shortest distance and nearly straight, resulting in less pressure loss and less heat loss, and providing an air conditioning and ventilation system with a rational structure that requires less construction. Another method involves the air conditioning unit having a reheat dehumidification function. With this method, during reheat dehumidification operation, one heat exchanger functions as an evaporator through which a low-temperature, low-pressure refrigerant flows, and the other heat exchanger functions as a reheater through which a medium-temperature, medium-pressure refrigerant flows. As a result, the discharged air is hotter than the intake air temperature and has low absolute humidity. When this air is discharged from the outlet, the reheat dehumidification thermostat remains ON for a long time, and the compressor operates continuously. This causes the evaporator surface temperature, or evaporation temperature, to fall below the dew point temperature of the intake air, causing moisture from the intake air to condense on the evaporator. Over time, a large amount of dehumidification is removed, the absolute humidity of the discharged air decreases over a long period, and the absolute humidity of the conditioned air also decreases. Consequently, the relative humidity in the air conditioning duct, room, and space through which the conditioned air flows also decreases, resulting in an air conditioning and ventilation system that is less prone to condensation in the air conditioning duct, especially during periods of medium temperature and high humidity such as the rainy season. Another means involves installing a HEPA filter type or electrostatic precipitator type air purifier in the circulation path or the air conditioning unit. By installing a HEPA filter type or electrostatic precipitator type air purifier in the circulation path or air conditioning unit, even mold spore-level particles contained in the conditioned air are removed. This makes it more difficult for mold to grow in the air conditioning ducts through which the conditioned air passes, and prevents mold, bacteria, and unpleasant odors from entering the building, resulting in an air conditioning and ventilation system that creates a healthy and comfortable space. Another means includes a temperature sensor for detecting the temperature of the room or space, a temperature setting unit for setting the temperature, a temperature sensor for detecting the temperature of the mixing unit, and a control unit for controlling the air conditioning unit and the blower unit based on the detected values ​​of the two temperature sensors and the set temperature of the temperature setting unit. This method automatically adjusts the average temperature of the room or space to the set temperature, making it highly convenient. The average temperature of the air inside the air conditioning duct is within 5K during cooling and within 10K during heating, relative to the average temperature of the air surrounding the air conditioning duct. This allows the room or space to be kept at the user's set temperature while suppressing condensation inside and outside the air conditioning duct. As a result, an air conditioning and ventilation system is obtained that reliably prevents mold growth even in the event of external disturbances or changes in the air conditioning load. Another means involves having at least one of a polypropylene film, a flexible polyvinyl chloride film, or a PET film on the surface inside the air conditioning duct through which the conditioned air flows. As a result, the air conditioning ventilation system has at least one of the following materials on the surface through which the conditioned air flows inside the air conditioning duct: a polypropylene film, a flexible polyvinyl chloride film, or a PET film, which is non-permeable, non-moisture-permeable, and has low surface roughness (surface irregularities). This prevents dust, moisture, and mold spores from entering the wood, insulation, sound-absorbing materials, etc. from the surface, making it difficult for mold to grow. Furthermore, dust and other particles do not easily accumulate on the surface, and it does not contain moisture, making it difficult for mold to grow. This prevents dust, mold, bacteria, and unpleasant odors from entering the building from the air conditioning duct, resulting in an air conditioning ventilation system that creates a healthy and comfortable space. [Effects of the Invention]

[0007] According to the present invention, by air conditioning a highly airtight and highly insulated building to maintain a uniform temperature and humidity, introducing fresh and clean outside air, and exhausting polluted indoor air containing moisture, the system can purify the air inside the building, thereby achieving an energy-saving, uniform temperature and humidity, good air quality, and a healthy and comfortable space. Furthermore, it can provide an air conditioning and ventilation system that prevents condensation from occurring inside and outside the air conditioning ducts, prevents dust and other particles from accumulating inside the air conditioning ducts, prevents mold growth, prevents odors caused by bacteria, and prevents dust, mold, bacteria, and unpleasant odors from entering the building from the air conditioning ducts, thereby creating a healthy and comfortable space. Furthermore, even after long-term use, this system eliminates the need for maintenance such as cleaning the air conditioning ducts or renovations during extended use, providing a consistently healthy and comfortable air conditioning and ventilation system within the building. Furthermore, by utilizing airtight and insulated spaces such as between floors, under floors, and attics—which are structurally partitioned in typical buildings—as air conditioning airflow paths and installing outlets in these spaces, it eliminates the need to run air conditioning ducts throughout the building, resulting in reduced construction time and providing a rational air conditioning and ventilation system with minimal pressure loss in the airflow path from the air conditioning unit to the outlet. Furthermore, it is possible to provide an air conditioning and ventilation system that allows users to set the room or space temperature according to their preferences, and that automatically adjusts to the set temperature while also preventing condensation inside and outside the air conditioning duct. Furthermore, it can provide an air conditioning and ventilation system that reduces noise such as crosstalk between the first and second floors while ensuring uniform temperatures between rooms, between spaces, and within rooms and spaces. Furthermore, instead of ducts, existing spaces such as the spaces between floors in a building are used as air conditioning airflow channels, and heat exchange ventilation systems are installed within these spaces. This eliminates the need for space to house ducts and heat exchange ventilation systems, thus providing a space-saving air conditioning and ventilation system. [Brief explanation of the drawing]

[0008] [Figure 1] Configuration diagram of the air conditioning and ventilation system in Embodiment 1 of the present invention [Figure 2] Vertical cross-section of the air conditioning unit of the system (1) [Figure 3] Vertical cross-section of the air conditioning unit of the same system (2) [Figure 4] Vertical cross-section of the air conditioning unit of the same system. [Figure 5] Control block diagram of the system [Figure 6] Longitudinal cross-sectional view of the air conditioning duct of the system in Embodiment 2 of the present invention [Modes for carrying out the invention]

[0009] (Embodiment 1) Figure 1 is a diagram showing the configuration of the air conditioning and ventilation system 1 in Embodiment 1 of the present invention. As shown in the diagram, the air conditioning and ventilation system 1 is installed in building 2, which is a highly airtight and highly insulated house. The conditioned air generated by the air conditioning unit 10 installed in building 2 is passed through air conditioning air passages A30 and B31 to thoroughly ventilate and air-condition the rooms and spaces within building 2. In this embodiment, "room" refers to a habitable room, and "space" refers to a non-habitable space. A habitable room is a room continuously used for purposes such as living, working, organizing, 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 2 has its outer envelope (the structural part of the building's exterior, such as the exterior walls, roof, floors exposed to the outside air, windows, etc.) completely covered with insulation material (not shown) and airtight sheets (not shown). The ceiling 3 on the second floor is covered with insulation material 4, making it a ceiling-insulated specification. The floor 5 on the first floor is covered with insulation material 6, making it a floor-insulated specification. The windows are insulated sashes 7 such as triple-glazed resin sashes, and the doors are insulated doors (not shown). Except for the attic space 9 from the ceiling 3 to the roof 8 and the underfloor space 12 from the floor 5 to the foundation 11, all rooms and spaces within Building 2 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 Building 2, which has no insulation defects in its exterior 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] In this air conditioning and ventilation system 1, the air conditioning unit 10, which is a highly airtight and insulated air conditioning room surrounded by the rooms and spaces to be air-conditioned, walls, and insulation, and is airtightly sealed, is located in the second-floor hall 15 at the top of the stairs 14 that lead from the entrance 13 to the second floor. Furthermore, the air conditioning unit 10 is equipped with a sealed door (not shown) that can be opened and closed to allow access to the interior from the second-floor hall 15 for maintenance purposes, and which provides high airtightness when closed. In this embodiment, the air conditioning unit 10 is installed in the second-floor hall 15, but it may also be installed in a non-habitable room such as under the stairs 16 or in a machine room (not shown). The air conditioning unit 10 that generates conditioned air is equipped with multiple air blowers 17, and an air conditioning unit 20 connected to an outdoor air conditioning unit 18 installed outside by refrigerant piping and electrical wiring 19. The air conditioning unit 20 has a heat exchanger (not shown) and a blower (not shown), and the blower unit 17 has a fan (not shown) and a motor (not shown). The air conditioning unit 20 and the blower unit 17 are attached to the intermediate plate 21 of the air conditioning unit 10. Behind them is an airtight and highly insulated air conditioning duct A30, which is surrounded by the air-conditioned room or space, walls, and insulation, and is sealed to airtightness. Part of the housing of the blower unit 17 and the outlet 22 protrude towards the air conditioning duct A30. The space between the ceiling 32 of the first floor and the floor 33 of the second floor, known as the inter-floor space 34, is covered by rooms and spaces that are air-conditioned both above and below, and the front, back, left, and right sides are covered by exterior walls etc. with insulating material 4. An airtight and highly insulated air conditioning duct B31 is provided, which is airtight and insulated, with airtight treatment such as applying an airtight sheet mainly to the contact surfaces, thus creating a structure that divides the building 2 into two parts, vertically. The air conditioning duct A30 and the air conditioning duct B31 are connected by a connection section 35 that extends to the depth of the air conditioning unit 10. The area of ​​the connection section is made large to minimize pressure loss when a large volume of conditioned air flows from the air conditioning duct A30 to the air conditioning duct B31. The space between floors 34 is created by attaching the second-floor subflooring (not shown) and floor 33 to the upper side of beams (not shown) and joists (not shown) fixed to columns (not shown), and the first-floor ceiling subflooring (not shown) and ceiling 32 to the lower side, and the height is generally 300-400 mm. The air conditioning duct B31 has an airtight and insulated structure in which airtight sheets are applied mainly to the contact surfaces to improve airtightness between the horizontally laid floor subflooring, floor 33, ceiling subflooring, ceiling 32 and the four exterior walls and vertically laid boards, and in the case of exterior walls, insulation material is installed to prevent thermal deficiencies. The air conditioning duct B31 has openings only at the connection point 35 and the outlets that blow conditioned air into each room, which will be described later.

[0011] In the building 2, the ceiling 32 of room A23, the floor 33 of room B24, and the ceiling 32 of the entrance 13 are fitted with air outlets 40, 41, and 42, respectively, which are connected to the air conditioning air passage B31. The air outlets 40, 41, and 42 are supply air grilles that blow out conditioned air, and the direction of the airflow can be changed. Air outlets 40 and 41 are equipped with blower fans 45 and 46, which have a fan (not shown) and a motor (not shown) on the side of the air conditioning air passage B31. Furthermore, 1-meter sound-dampening ducts 47 and 48 are connected to the blower fans 45 and 46 to stabilize the performance of the blower fans, reduce the noise of the blower fans themselves, and prevent the propagation of blower noise from the blower unit 17 and other parts of the unit, as well as noise from other rooms or other floors (crosstalk). The length of the sound-dampening ducts 47 and 48 can be adjusted depending on the level of noise. Although blower fans 45 and 46 and sound-dampening ducts 47 and 48 are connected to outlets 40 and 41, the purpose of the blower fans is to increase the airflow from outlets 40 and 41, as will be explained later, and the purpose of the sound-dampening ducts is to stabilize the performance of the noisy fans and to reduce noise. Therefore, the air conditioning air passage B31 and outlets 40 and 41 are directly connected as an airflow path. In this embodiment, sound-dampening ducts 47 and 48 are connected to the blower fans 45 and 46. However, even if the sound-dampening ducts are connected directly to the air outlet 42 or other components, the propagation of airflow noise from the blower unit 17 and other components, as well as the propagation of noise from other rooms or other floors (crosstalk), can be prevented. In this embodiment, air vents are provided in rooms A23 and B24, which are considered living spaces, but they may also be provided in the living room / dining room / kitchen, bedroom, children's room, study, washroom, toilet, bathroom, kitchen, etc. Similarly, air vents are provided in the entrance hall 13, which is considered a non-living space, but they may also be provided in the second-floor hall 15, under the stairs 16, attic space 9, underfloor space 12, machine room, corridor, storage room, closet, shoe cabinet, etc. The conditioned air blown out from the outlet 22 of the air blower unit 17 passes through the air conditioning air passage A30, through the air conditioning air passage B31, through the blower fans 45 and 46, and is blown out from outlets 40, 41 and 42 to rooms A23, B24, and the entrance 13. Although not shown in detail in Figure 1, there are other rooms and spaces with air vents, and accordingly, the air conditioning duct B31 is extended horizontally to connect to the air vents in the floor and ceiling of those rooms and spaces, ensuring that the entire building 2 is thoroughly air-conditioned and ventilated. When the air outlets on the ceiling 32 side of the first floor and the floor 33 side of the second floor, which are connected to the air conditioning duct B31, overlap when viewed from above, with the air conditioning duct B31 in between, noises from the first floor may be heard on the second floor, or vice versa (crosstalk), potentially making it difficult to maintain privacy. In such cases, however, crosstalk noise can be reduced by creating a distance of 2m or more between the second-floor and first-floor air outlets. For example, there was a difference of approximately 3dB in noise between 1m directly below the first-floor air outlet and 1m directly above the second-floor air outlet.

[0012] As shown in Figure 1, the air conditioning ducts A30 and B31 are far from the building envelope of Building 2 and surrounded by rooms, spaces, and insulation materials, so they are not affected by outside air or solar radiation and tend to become the same temperature as the rooms and spaces. Generally, the cross-sectional area of ​​an air conditioning duct should be designed and selected to ensure that the air velocity within the duct is 5-7 m / s or less, and that there is sufficient margin in airflow and static pressure at the point of use, based on the PQ (static pressure - airflow) characteristics of the blower and ventilation fan, so as not to increase power consumption and noise. As a result, the conditioned air generated within the air conditioning unit 10 is blown by the blower unit 17 through the air conditioning air passages A30 and B31, which are surrounded by rooms, spaces, and insulation materials, etc., then through the blower fans 45 and 46, and finally through the outlets 40, 41, and 42 to form supply air passages (thick arrows) that are blown out to rooms A23, B24, and the entrance 13.

[0013] Exhaust vents 50 and 51, such as undercuts in the doors (not shown) of rooms A23 and B24, open between the entrance hall 13 and the second-floor hall 15. An air return port 55 (intake section), such as an intake grille, is provided above the sealed door (not shown) on the second-floor hall 15 side of the air conditioning unit 10, and all the air drawn into the air conditioning unit 10 is drawn in through the air return port 55 (intake section). As a result, the air from room A23 passes through the exhaust vent 50, enters the entrance hall 13, and passes through the stairs 14. The air from room B24 passes through the exhaust vent 51, enters the second-floor hall 15, and returns to the air conditioning unit 10 through the return air vent 55, forming a return air passage (thin arrow, including inside the air conditioning unit 10). Then, the supply air passage and the return air passage are connected to form a circulation passage (not shown, including the inside of the air conditioning unit 10).

[0014] Within the inter-floor space 34, on the left side of the air conditioning duct B31, in a location that does not easily affect the supply air duct, a heat exchange ventilation unit 60 is installed to introduce outside air into the room and recover all the heat from the indoor air into the outside air when the indoor air is discharged outside, thereby ventilating the entire building 2. In this embodiment, the heat exchange ventilation unit 60 has a 24-hour ventilation airflow of 125 m³. 3 / h, strong notch ventilation airflow 250m 3 At a rate of / h, the total heat exchange rate is approximately 70%. In the ceiling of the toilet 61 inside building 2, a ventilation exhaust vent 62, such as an exhaust grille, is provided to exhaust the air inside the toilet 61, and is connected to an exhaust duct (not shown) or directly to a heat exchange ventilation unit 60. An outdoor exhaust hood A66 is installed in a penetration hole in the exterior wall of building 2, and is connected to a heat exchange ventilation unit 60 by an exhaust duct A65.

[0015] The heat exchange ventilation unit 60 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 63 for recovering the total heat from the indoor air into the outdoor air, and a pre-filter 64 for the element, which is positioned on the indoor air inlet side of the heat exchange element 63 to prevent dust and other particles from the indoor air from adhering to the element. The element pre-filter 64 is a 10mm-20mm thick nonwoven fabric made of polyester and modacrylic. It is used at a standard airflow speed of 2.5m / s, has an efficiency (gravimetric method) of 75%, and is regenerative by washing. Furthermore, an inspection hatch is provided in the ceiling of the toilet 61 below the heat exchange ventilation unit 60, making it easy to perform regular maintenance such as cleaning the heat exchange element 63 and the pre-filter 64 for the element. As a result, indoor air passes through the ventilation exhaust port 62 and the exhaust duct, etc., and all the heat is recovered in the heat exchange ventilation unit 60. The air is then exhausted outside through the exhaust duct A65 and the outdoor exhaust hood A66. The indoor air exhaust passage is formed between the ventilation exhaust port 62 and the outdoor exhaust hood A66, and is comprised of an exhaust duct, a heat exchange ventilation unit 60, and an exhaust duct A65. The indoor air exhaust passage is provided with a pre-filter 64 for the elements of the heat exchange ventilation unit 60, but other filters may be provided in addition to or together with the pre-filter 64. The indoor air exhaust passage is also provided with an exhaust fan (not shown) for the heat exchange ventilation unit 60, but other exhaust fans may be provided in addition to or together with this exhaust fan. An outdoor air supply hood 67 is installed in a penetration hole in the exterior wall of building 2, and is connected to a heat exchange air unit 60 by an air supply duct A68. In the middle of the air supply duct A68, between floors 34, a filter box 70 containing an outside air purification filter 69 for purifying the incoming outside air is provided, with an inspection opening in the ceiling of the toilet 61 below it, to facilitate maintenance such as cleaning the filter. The outdoor air purification filter 69 is a 35mm thick particulate filter made of polyethylene terephthalate, polypropylene, and PP resin. It can capture particles larger than 0.5μm, such as mold spores, and captures particles larger than 2μm with an efficiency of approximately 95%. It is designed to be replaced approximately once every two years.

[0016] On the floor of the second-floor hall 15, a ventilation supply vent 71 is provided in front of the return air vent 55 of the air conditioning unit 10, which blows outside air into the building 2, and is connected to the heat exchange ventilation unit 60 by an air supply duct B72. As a result, outdoor air is introduced from the outdoor air supply hood 67, passes through the air supply duct A68, is purified in the filter box 70, recovers total heat in the heat exchange unit 60, and is introduced into the room through the ventilation air inlet 71 via the air supply duct B72. The outdoor air intake passage is formed between the outdoor air supply hood 67 and the ventilation air inlet 71, and is comprised of an air supply duct A68, a filter box 70, a heat exchange air unit 60, and an air supply duct B72. The outdoor air intake passage is equipped with an outside air purification filter 69 of the filter box 70, but other filters may be provided in addition to or together with the outside air purification filter 69. The outdoor air intake passage is also equipped with an intake fan of the heat exchange air unit 60, but other intake fans may be provided in addition to or together with this intake fan.

[0017] When an exhaust duct connects the ventilation exhaust port 62 to the heat exchange unit 60 within the floor 34, the floor 34 is an insulated space surrounded by air-conditioned rooms or spaces above and below, and enclosed on all sides by insulation materials. Therefore, the possibility of condensation inside the duct is low, and to prevent dust and moisture from accumulating inside the duct and absorbing water, a non-insulated duct made only of polypropylene, without any insulation material or non-woven fabric on the inside of the duct, is used. The exhaust duct A65 and the supply duct A68 are ducts that come into contact with the outside air, located in the gap 34 between the outdoor exhaust hood A66 or outdoor supply hood 67 and the heat exchange ventilation unit 60. Therefore, condensation is possible, and dust and other particles may flow in from outside. For this reason, ducts with high thermal insulation, moisture resistance, and flexibility are used. The duct consists of, from the outside in, an external covering material (not shown) such as a flexible polyethylene sheet with a thickness of approximately 0.08 mm, and a 25 mm thick, 24 kg / m³ duct. 3The duct has an internal covering material (not shown) such as a polypropylene film, flexible polyvinyl chloride film, or PET film with a thickness of approximately 0.1 mm, which is non-permeable, non-moisture-permeable, and has a low surface roughness (surface irregularities), and an air passage (not shown) through which air passes. A molding core material (not shown) such as polypropylene resin is provided between the inside of the insulation material and the internal covering material so that the duct does not buckle even when bent and the cross-sectional area of ​​the internal air passage is secured. The reason polypropylene film is used as the internal covering material instead of nonwoven fabric is that its surface roughness makes it difficult for dust and other debris to accumulate on the inner surface of the duct, and because it does not contain moisture, mold and other organisms are less likely to grow. Furthermore, because it is non-permeable and non-moisture permeable, dust, moisture, and mold spores cannot enter the glass wool from the inner surface of the duct, making it difficult for mold and other organisms to grow there. The insulation material is 25mm thick and has a density of 24kg / m². 3 If a certain amount of glass wool is used, but the outer diameter of the duct becomes large and it is difficult to secure space for the duct within the 34 floors between floors of the building, the density of the insulation material should be increased to 100 kg / m³. 3 Alternatively, you can ensure duct space by using glass wool or similar material with a thickness of 10 mm or less. The supply air duct B72 is an air supply duct installed in the gap 34 between the ventilation air inlet 71 and the heat exchange air unit 60. Since it is a duct through which indoor air and heat-exchanged outdoor air pass, it is made of a flexible duct that has heat insulation and moisture resistance. The heat exchange ventilation unit 60, exhaust duct B65, and supply air duct A68 are in contact with the outside air, so there is a possibility of condensation and the intrusion of dust from outside. Therefore, an inspection opening should be provided nearby so that periodic cleaning and replacement during long-term use can be performed without removing the ceiling of the toilet 61, etc. Building 2 has ceiling insulation and floor insulation, but the attic space 9 and underfloor space 12 are uninsulated spaces. If heat exchange ventilation units 60, filter boxes 70, exhaust ducts B65, etc. are installed in these spaces, condensation may form on them or their performance may decrease. Normally, these are installed by lowering part of the ceiling in insulated spaces such as rooms and corridors, but this results in lower ceiling height and reduced living space. In the air conditioning and ventilation system 1 of this embodiment, a heat exchange ventilation unit 60, a filter box 70, an exhaust duct B65, etc., are installed in an insulated space between floors 34 that has a sufficient cross-sectional area to serve as an air conditioning air passage. An inspection opening is provided in the ceiling of the toilet 61, etc., below the system, making it easy to perform periodic cleaning and replacement during long-term use.

[0018] The toilet 61 does not have an air outlet for blowing out conditioned air. Instead, a louver 75 is provided between it and the entrance 13, allowing air to enter and exit. When the heat exchange ventilation unit 60 is in operation, some of the conditioned air that has returned to the entrance 13 flows into the toilet 61 through the louver 75. When stable, the air quality inside the toilet 61 (temperature, humidity, cleanliness, etc.) is close to that of conditioned air. When the heat exchange ventilation unit 60 is in operation, fresh outdoor air purified by the outdoor air purification filter 69 installed in the outdoor air intake passage is introduced by the introduction fan of the heat exchange ventilation unit 60. A portion of the air that has been air-conditioned in the room and space, along with the air contaminated with moisture from so-called dirty zones such as the toilet 61, enters the heat exchange ventilation unit 60 through the ventilation exhaust port 62 and the indoor air exhaust passage, and is brought into the heat exchange ventilation unit 60 by the exhaust fan of the heat exchange ventilation unit 60. After exchanging total heat with the outdoor air in the heat exchange element 64, the air is discharged outside. As a result, dust and mold spores from outside are not allowed into the building 2, moisture and odors from toilets etc. are discharged outside, and heat exchange allows for energy-saving ventilation of the building 2 while reducing dust, moisture, mold spores, etc. inside the building. In this embodiment, the toilet 61 is equipped with a ventilation exhaust port 62 and a louver 75. However, the ventilation exhaust port 62 and louver 75 may also be installed in other rooms or spaces where odors, moisture, harmful substances, etc. tend to be generated and accumulate, such as the washroom, bathroom, or kitchen—so-called "dirty zones." In this case, these can be discharged directly to the outside without passing through other rooms or spaces. However, if the heat exchange element 64 of the heat exchange ventilation unit 60 is not resistant to deterioration from moisture in bathrooms, oil in kitchens, etc., it will be necessary to install another ventilation fan, as described later. Furthermore, ventilation exhaust vents 62 may be installed in rooms or spaces downstream of the circulation path (return air path), such as the entrance hall 13, the second-floor hall 15, and the air conditioning unit 10. In this case, some of the indoor air from the room or space will be discharged outside along with dust and moisture generated in that room or space through normal daily life. However, to prevent moisture from the dirty zone from flowing into that room or space, it is necessary to install another ventilation exhaust vent in the dirty zone or another ventilation fan, as described later.

[0019] In the ceiling of bathroom 80 in building 2, there is a high-notch airflow system that exhausts the air inside bathroom 80 at a rate of 80 m³. 3 A ceiling-mounted ventilation fan 81 is installed and connected by an exhaust duct C82 to an outdoor exhaust hood C83 located in a penetration hole in the exterior wall of building 2. Typically, the ceiling of a unit-type bathroom is lower than the ceiling 3 on the second floor of building 2, so the ceiling-mounted ventilation fan 81 is installed in the insulated space. The exhaust duct C82 is installed in the insulated space between the outdoor exhaust hood C83 and the ceiling-mounted ventilation fan 81. As it is a duct that comes into contact with the outside air, it has the same specifications as the flexible exhaust duct A65 and supply duct A68, which have high thermal insulation and moisture resistance. Since the ceiling-mounted ventilation fan 81 and exhaust duct C82 are in contact with the outside air, there is a possibility of condensation and the intrusion of dust from outside. Therefore, an inspection opening should be provided nearby to allow for regular cleaning and replacement. Bathroom 80 does not have an air outlet for blowing out conditioned air. Instead, a louver 76 is provided between it and the second-floor hall 15, allowing air to enter and exit. When the ceiling-mounted ventilation fan 81 is in operation, some of the conditioned air that has returned to the second-floor hall 15 flows into bathroom 80 through the louver 76. When stable, the air quality inside bathroom 80 is close to that of conditioned air (temperature, humidity, cleanliness, etc.).

[0020] In this embodiment, a ceiling-mounted ventilation fan 81 is provided in the bathroom 80. However, ventilation fans may also be installed in other rooms or spaces, such as washrooms, toilets, and kitchens, where strong odors, large amounts of moisture, and harmful substances tend to be temporarily generated and accumulate due to bathing, washing, laundry, defecation, cooking, etc., allowing these to be quickly and directly discharged to the outside. Furthermore, although a ceiling-mounted ventilation fan 81 is provided in this embodiment, any ventilation fan that can quickly exhaust air directly to the outside may be used, for example, a wall-mounted type or an intermediate duct type. In addition, a heat exchange ventilation unit in which the heat exchange element is less likely to deteriorate due to moisture in bathrooms, oil in kitchens, etc. may also be used.

[0021] The air conditioning unit 10 is equipped with multiple filters 85, 86, and 87 (filter sections A, B, and C) to purify the air inside the building 2. As one of several filters, a return air filter 85 (filter section A) is provided at the return air port 55 (intake section) of the air conditioning unit 10, such as the intake grille, so that it can be removed from the second-floor hall 15 side for cleaning and other maintenance. This filter removes dust and other particles from all of the air being drawn in at the uppermost upstream of the airflow path inside the air conditioning unit 10. Furthermore, the air conditioning unit 20 is equipped with an air conditioning unit filter 86 (filter section B) upstream of the heat exchanger (not shown) to purify the intake air, prevent dust and other contaminants from adhering to the heat exchanger, and blow out air that has been conditioned and free of dust and other contaminants. Furthermore, at the downstream end of the airflow path within the air conditioning unit 10, the air blower section 17 is equipped with an air blower filter 87 (filter section C) upstream of the fan (not shown) to purify the intake air and prevent dust and other particles from being blown out into the air conditioning airflow path A30, air conditioning airflow path B31, room A23, room B24, entrance 13, and second-floor hall 15. Furthermore, both the air conditioning filter 86 and the blower filter 87 can be removed from the main unit and regularly cleaned and maintained.

[0022] The three filters, 85, 86, and 87, are all designed to be suitable for collecting dust and other particles, balancing collection efficiency with maintenance frequency. The return air filter 85 is a nonwoven fabric made of polyester and modacrylic, with a thickness of 15mm to 30mm. It is used at a standard airflow speed of 1m / s, has an efficiency (gravimetric method) of 80% or more, and is regenerative through washing. The air conditioning filter 86 is made by molding a filter woven from polypropylene fibers in a honeycomb pattern onto a resin frame. Although it has low efficiency, it has low pressure loss, no water absorption or hygroscopic properties, and is easy to clean by washing. The blower filter 87 is a 2mm thick nonwoven fabric made of polyester or other materials, used at a standard airflow speed of 2m / s, with an efficiency (gravimetric method) of 30%, appropriate pressure loss, and is regenerative by washing. If the frequency of maintenance such as cleaning is to be reduced, a filter made of polypropylene fibers woven in a honeycomb pattern and molded into a resin frame, similar to the air conditioning filter 86, may be used, although the efficiency will be slightly lower. However, care must be taken as this may reduce the pressure loss too much and affect the mixing of conditioned air in the mixing section 95 upstream of the blower filter 87. As described above, filter sections A, B, and C are provided at the return air port 55 (intake section) at the uppermost part of the airflow path at the inlet of the air conditioning unit 10, at the air conditioning section 20 inside the air conditioning unit 10, and at the blower section 17 at the lowermost part of the airflow path at the outlet of the air conditioning unit 10. The main purpose of the filter sections is to remove dust and other particles, which are one of the conditions for mold growth. Three filter sections are provided in approximately series from the uppermost to the lowermost part of the airflow path, balancing appropriate collection efficiency and maintenance frequency for collecting dust and other particles. Therefore, the possibility of the filter sections becoming clogged prematurely and causing a large pressure loss is low, and dust and other particles can be reliably collected while keeping the maintenance frequency low. Furthermore, since filter sections are provided at both the inlet and outlet of the air conditioning unit 10, all the air passing through the air conditioning unit 10 that produces purified air is purified twice in one cycle. Even if there is a gap between one of the filter sections and the housing, causing dust to leak out, it is possible to reliably prevent dust from entering the air conditioning duct. This ensures that dust does not enter the air conditioning duct while reducing the frequency of maintenance during long-term use.

[0023] An electric dust collector type air purifier 90 is installed in the air conditioning unit 10, downstream of the return air port 55, between the air conditioning unit 20 and the blower unit 17. The air purifier 90 is equipped with a pre-filter and an electric dust collector. The pre-filter is a coarse mesh filter made of stainless steel (SUS) with a mesh size of approximately 20-50, located upstream of the electrostatic dust collector. It primarily removes visible coarse particles, those with a particle size of 10-20 μm or larger, from the air drawn in from the return air port 55 and the air blown out from the air conditioning unit 20, before allowing the air to pass through the electrostatic dust collector. The pre-filter may be made of a resin such as polypropylene, depending on the application. An electrostatic dust collector located downstream of the pre-filter removes even finer particles, those with a diameter of 0.3 μm or larger, such as airborne mold spores, dust, pollen, yellow sand, and PM2.5. In this embodiment, an electric dust collector type air purifier 90 is provided, 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 shape of the machine, the shape of the air conditioning unit 10, the airflow velocity inside the air conditioning unit 10, the frequency of maintenance such as cleaning, etc. 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. Furthermore, the pre-filter and electrostatic dust collector can be easily cleaned, replaced, and otherwise maintained by opening the sealed door of the air conditioning unit 10. In this embodiment, the air purifier 90 is installed inside the air conditioning unit 10, but it may also be installed in the middle of the return air path from room A23 or the like back to the air conditioning unit 10.

[0024] In this embodiment, the air blower 17 within the air conditioning unit 10 is separated from the blower (not shown) of the air conditioning unit 20. However, any configuration of the air blower 17 and blower is acceptable as long as the air conditioning air blowing function for heat exchange in the heat exchanger (not shown) and the air transport function for blowing air to each room and each space work effectively. In this embodiment, the air conditioning unit 10 is an air-conditioned room sealed with walls and insulation, but it may also be a compact enclosure covered with sheet metal and insulation. As long as the relative positions of the air conditioning unit 20 and the blower unit 17 allow the air drawn in from the return air port 55 and the air blown out from the air conditioning unit 20 to mix well without shortcuts, it may also be possible to enclose a part of a space such as the second-floor hall 15, the area under the stairs 14, or a corridor with walls, etc., to install the air conditioning unit 20, blower unit 17, etc., while leaving a part of the space open. However, it is desirable that the size be such that the air conditioning unit 20 and blower unit 17 can be easily maintained. Below the air purifier 90 inside the air conditioning unit 10, there is an air conditioning unit controller 110 which has a sensor and control unit that detects the temperature, humidity, and dust concentration of the air after it has passed through the air purifier 90. In the second-floor hall 15 where the return air from the room and space and the outside air gather, there is a room temperature controller 120 which has a sensor that detects the temperature, humidity, and dust concentration of the air in the second-floor hall 15 after these airs have been mixed and made uniform, as well as a temperature setting unit and control unit that sets the temperature of the second-floor hall 15. The air conditioning unit controller 110 and the room temperature controller 120 are connected by signal lines that exchange signals with the control unit of the air conditioning unit 20 and the control unit of the blower unit 17.

[0025] Figure 2 is a longitudinal cross-sectional view of the air conditioning unit 10. The air conditioning unit 10, which is sealed by walls (including a sealed door) and insulation, is installed in the second-floor hall 15. Above the sealed door (not shown) that is adjacent to the second-floor hall 15, there is a return air vent 55 (intake section) that allows air from room A23 or the like to return to the air conditioning unit 10, and the return air vent filter 85 (filter section A) is provided. The air conditioning unit 20 and the blower unit 17 are attached to the intermediate plate 21 of the air conditioning unit 10. Behind them is an airtight and highly insulated air conditioning duct A30, which is surrounded by the air-conditioned room or space, walls, and insulation, and is sealed to airtightness. Part of the housing of the blower unit 17 and the outlet 22 protrude towards the air conditioning duct A30. The air conditioning unit 20 uses a blower (not shown) to draw in a portion of the air (a mixture of air returned from rooms and spaces in the second-floor hall 15 and outside air introduced from outside) from the return air inlet 55 by the blower 17, draws it in from the intake ports 96 on the top and front, cleans it with the air conditioning unit filter 86 (filter section B), and blows out the air that has exchanged heat with the refrigerant in the heat exchanger (not shown) downwards from the outlet 97. An air purifier 90 is installed between the air conditioning unit 20, the return air vent 55, and the blower unit 17, so as to partition the upper and lower parts of the air conditioning unit 10. Below the air purifier 90, in front of the air blower 17, is the mixing unit 95, a space where some of the air drawn in from the return air inlet 55 (air mixed in the second-floor hall 15 with return air from rooms and spaces and outside air introduced from outside) is mixed with the blown-out air from the air conditioning unit 20. The air blower unit 17 uses a fan (not shown) to purify the air blown out from the air conditioning unit 20 and a portion of the air that bypasses being drawn into the air conditioning unit 20 through the return air port 55, passing it through the air purifier 90. The conditioned air mixed in the mixing unit 95 is then drawn in through the intake port 98, further purified by the air blower unit filter 87 (filter unit C), and flows into the air conditioning air passage A30. This air then passes through the connection unit 35 and enters the air conditioning air passage B31 between floors 34. Since multiple air blowers 17 are equipped with air blower filters 87 (filter section C), they provide appropriate resistance to the airflow drawn into the air blowers 17. Upstream of the air blower filters 87 (filter section C), in the mixing section 95, which is the space in front of the filter, the air blown out from the air conditioning unit 20 and the remaining portion of the air drawn in from the return air port 55 (intake section) stagnate slightly, creating turbulence and promoting mixing. This results in conditioned air with uniform air quality (temperature, humidity, cleanliness, etc.), and the conditioned air drawn into the multiple air blowers 17 and the conditioned air passing through the air conditioning air passages A30 and B31 become uniform in air quality. As a result, the air quality throughout the building becomes uniform.

[0026] Figure 3, like Figure 2, is a vertical cross-sectional view of the air conditioning unit 10, showing the case where the air outlet duct 36 is connected to the air blower 17. The blower unit 17 has a sirocco fan (not shown), and the outlet (not shown) of the casing (not shown) and the outlet 22 are close together. In the case of an open state where a duct cannot be connected to the outlet 22, the flow of the discharged air may not be stable depending on the installation conditions. In such cases, connecting a discharge duct 36 of about 1.5 m in length to the outlet 22 may stabilize the flow and allow the blower unit 17 to perform as intended by temporarily reducing the cross-sectional area and increasing the air velocity. The discharge duct 36 is a flexible duct with an inner diameter of 150 mm, offering high thermal insulation and moisture resistance. The duct is constructed as follows, from the outside in: an external covering material 100, such as a flexible polyethylene sheet with a thickness of approximately 0.08 mm; and a 25 mm thick sheet with a density of 24 kg / m³. 3 The insulation material, such as glass wool or polyester nonwoven fabric, is non-permeable, non-moisture-permeable, and has a low surface roughness (surface irregularities), with an internal covering material such as a polypropylene film, flexible polyvinyl chloride film, or PET film about 0.1 mm thick, which serves as an air passage through which conditioned air passes. A molding core material (not shown) made of polypropylene resin or similar is provided between the inside of the insulation material and the internal covering material, so that even if the discharge duct 36 is bent, it will not buckle and the cross-sectional area of ​​the internal air passage can be secured. One end of the discharge duct 36 is connected to the outlet 22 of the blower unit 17, and the other end is connected to a hole in a partition wall 37 fixed to a beam or the like in the air conditioning air passage B31 within the inter-floor space 34. The conditioned air blown by the blower unit 17 enters the air conditioning air passage B31. The partition wall 37 is primarily for fixing the discharge duct 36. If the entire inter-floor space 34 is provided with a highly airtight and insulated air conditioning air passage B31, and the partition wall 37 is installed within it, there is no need to apply airtight seals to the contact surfaces between the air conditioning air passage B31 and the discharge duct 36. If the discharge duct 36 is not crushed or blocked, the partition wall 37 may be omitted, and the discharge duct 36 may simply be placed in the air conditioning air passage B31. In this case, the outlet duct 36 is connected only to enable the performance of the air blower 17, so the air blower 17 and the air conditioning air duct B31 are directly connected as an air passage. However, if the left side facing the floor 34 is not used as the air conditioning duct B31, it is necessary to maintain a high level of airtightness of the air conditioning duct B31 by applying airtight seals or the like to the contact surfaces between the partition wall 37 and the air conditioning duct B31 on the top, bottom, left, and right sides, and the contact surfaces with the discharge duct 36. If maintenance such as cleaning or replacement of the inside of the discharge duct 36 is required, the air blower unit 17 can be removed from the intermediate plate 21, allowing the discharge duct 36 to be pulled out and the maintenance to be performed. In this embodiment, the discharge duct 36 is approximately 1.5m long and extends to the partition wall 37. However, if there is an outlet far from the connection point 35 of the air conditioning air passage B31, and there is a resisting structure such as a beam or joist in between, the airflow from the outlet may be less than the design airflow, potentially causing uneven temperatures between rooms or spaces, or uneven temperatures within a room or space. In such cases, the discharge duct 36 can be extended to that outlet and connected directly to it, allowing the corresponding airflow from the air blower 17 to be blown out at the outlet. However, in case maintenance such as cleaning or replacement of the inside of the discharge duct 36 is required, an inspection opening must be provided in the ceiling 32 of the first floor, which is below the floor 34, or in the floor 33 of the second floor, which is above it.

[0027] Figure 4 is a longitudinal cross-sectional view of the air conditioning unit 20. Air drawn in from the intake ports 96 on the top and front of the housing of the air conditioning unit 20 is purified by the air conditioning unit filter 86, heat is exchanged with the refrigerant in the heat exchangers 91 and 92, and then blown out by the blower 100 from the outlet 97 in the direction the louvers 94 are facing. The air conditioning unit 20 has three operating modes: cooling, heating, and reheat dehumidification. The heat exchangers 91 and 92 are structured so that the characteristics of the refrigerant flowing through them change depending on the operating mode, and their roles switch accordingly. In other words, during cooling operation, both heat exchangers 91 and 92 function as evaporators through which low-temperature, low-pressure refrigerant flows, and during heating operation, both heat exchangers 91 and 92 function as condensers through which high-temperature, high-pressure refrigerant flows. During reheat dehumidification operation, heat exchanger 91 functions as an evaporator through which a low-temperature, low-pressure refrigerant flows, and heat exchanger 92 functions as a reheater through which a medium-temperature, medium-pressure refrigerant flows. The surface temperature of heat exchanger 91 (evaporator) becomes the evaporation temperature of the refrigerant, which is below the dew point temperature of the intake air. As a result, the temperature and absolute humidity of the air that passes through decreases, and the condensed water (dehumidified water) that forms on the surface of heat exchanger 91 (evaporator) flows into the drain pan 93 below heat exchanger 91 (evaporator) and is drained outside via a drain hose (not shown). The surface temperature of heat exchanger 92 (reheater) becomes the condensation temperature of the refrigerant, which is above the temperature of the intake air. As a result, the temperature of the air that passes through increases. The air that has passed through these two heat exchangers 91 and 92 is combined and mixed by the blower 90 to become discharge air that is above the temperature of the intake air and has low absolute humidity, and is blown out from the outlet 97.

[0028] Figure 5 is a control block diagram of the system. The air conditioning unit controller 110 has a temperature sensor 111 that detects the temperature of the conditioned air in the mixing section 95 after it has passed through the air purifier 90 and before it is drawn into the blower section 17, a humidity sensor 112 that detects the humidity of the same air, and a dust sensor 113 that detects the mass concentration of dust in the same air, and transmits data to the control unit 114. The room temperature controller 120 has a temperature sensor 121 that detects the temperature of the air drawn into the return air port 55 (air mixed in the second-floor hall 15 with return air from rooms and spaces and outdoor air introduced from outside), a humidity sensor 122 that detects the humidity of the air, a dust sensor 123 that detects the mass concentration of dust in the air, and a temperature setting unit 125 that sets the temperature of the air, and transmits data to the control unit 124. The air conditioning unit 20 has an intake temperature sensor 133 that detects the temperature of the intake air that is heat-exchanged in the heat exchangers 91 and 92, and transmits data to the control unit 130. It also has a blower control unit 131 that controls the rotation speed of the blower 100 according to the instructions of the control unit 130, and a louver control unit 132 that controls the angle of the louvers 94. The air conditioning outdoor unit 18 includes a compressor control unit 136 that controls the rotational speed of a compressor (not shown) according to instructions from the control unit 135, and an outdoor fan control unit 137 that controls the rotational speed of an outdoor fan (not shown). The blower unit 17 has a motor control unit 141 that controls the rotation speed of a motor (not shown) according to instructions from the control unit 140.

[0029] The control unit 114 of the air conditioning unit controller 110 and the control unit 124 of the room temperature controller 120 are connected by a signal line 150 and exchange signals. The control unit 114 of the air conditioning unit controller 110 and the control unit 130 of the air conditioning unit 16 are connected by a signal line 151, and they exchange signals. The control unit 130 of the air conditioning unit 20 and the control unit 135 of the air conditioning outdoor unit 18 are connected by a signal line 152 and exchange signals. The control unit 114 of the air conditioning unit controller 110 and the control units 140 of the multiple air blowers 17 are connected by signal lines 153, and they exchange signals with each other.

[0030] The air purifier 90 has an electrostatic dust collector control unit 161 that controls the operation of the electrostatic dust collector according to instructions from the control unit 160. The control unit 114 of the air conditioning unit controller 110 and the control unit 160 of the air purifier 90 are connected by a signal line 154, and they exchange signals. The heat exchange ventilation unit 60 has a motor control unit 166 that controls the rotation speed of the motor according to instructions from the control unit 165. The control unit 114 of the air conditioning unit controller 110 and the control unit 165 of the heat exchange ventilation unit 60 are connected by a signal line 155 and exchange signals.

[0031] In the above configuration, the air conditioning unit controller 110 and the room temperature controller 120 are connected to the air conditioning unit 20, multiple blowers 17, air purifiers 90, and heat exchange ventilation unit 60 by multiple signal lines 150 to 155, respectively, and communicate with each other to properly control the air conditioning and ventilation system 1. In this embodiment, communication is performed using a wired method via signal lines, but wireless communication units may be provided for each, and communication may be performed using wireless methods such as Wi-Fi (registered trademark), Bluetooth (registered trademark), or infrared.

[0032] In the above configuration, when the temperature is set in the temperature setting unit 125 of the room temperature controller 120 and the air conditioning and ventilation system 1 is operated, the air conditioning unit 20, the multiple air blowers 17, the air purifier 90, and the heat exchange ventilation unit 60 are properly controlled and operated by the air conditioning unit controller 110. The air returned from each room and space after air conditioning is returned to the second-floor hall 15 through the return air passage by multiple fans 17. Furthermore, the outdoor air, which has been purified by the filter box 70 and whose heat has been exchanged with the indoor air by the heat exchange unit 60, enters the second-floor hall 15 through the ventilation air inlet 71. These airs are mixed in the second-floor hall 15, purified by the return air filter 85 (filter section A) of the return air port 55 of the air conditioning unit 10, and then flow into the air conditioning unit 10. The air conditioning unit 20 draws in a portion of the air sucked in from the return air port 55 through the intake port 96, cleans it with the air conditioning unit filter 86 (filter section B), and then blows out the air that has exchanged heat with the refrigerant in the heat exchanger (not shown) downwards from the outlet port 97. With the plurality of blower units 17, the remaining air sucked in from the return air inlet 55 bypasses the air conditioning unit 20 and passes through the air cleaner 90 together with the blown air blown out from the air conditioning unit 20. Further, fine bacteria and the like are removed, and the air is purified and becomes well-mixed conditioned air in the mixing unit 95. The plurality of blower units 17 suck in the conditioned air from the suction port 98, further clean it with the blower filter 87 (filter unit C), and let it flow into the air conditioning air duct A30. In this embodiment, the air volume of the air conditioning unit 20 is about 600 m 3 / h, and the temperature of the blown air is about 10 K during cooling and about 20 K during heating with respect to the temperature of the sucked air. However, the total air volume of the plurality of blower units 17 is about 1500 m 3 / h. Therefore, among the air sucked in from the return air inlet 55, when the remaining air of about 900 m 3 / h bypassing the air conditioner 20 is mixed in the mixing unit 95, conditioned air within about 5 K during cooling and about 10 K during heating of about 1500 m 3 / h is sucked into the plurality of blower units 17.

[0033] Here, since the building 2 has high airtightness and high heat insulation and there is almost no temperature gradient in the return air duct, the temperature of the sucked air of the air conditioning unit 20 is almost the same as the temperature of the second-floor hall 15, the average temperature of the return air from each room and each space, and the average temperature of each room and each space. The air conditioning air duct A30 is connected to the air conditioning air duct B31 at the connection part 35. Both are far from the outer skin of the building 2 and are surrounded by rooms, spaces, walls, and heat insulation materials, and airtight treatment is also performed. Therefore, almost no temperature gradient occurs in the conditioned air in the air conditioning air duct. The inner surfaces of the air conditioning ducts A30 and B31 consist of subfloor boards, beams, joists, etc. To prevent fine dust particles originally attached to these surfaces from being carried into the room or space by the passing conditioned air, an internal covering material such as a non-permeable, non-moisture-permeable polypropylene film, flexible polyvinyl chloride film, or PET film with a thickness of about 0.1 mm, with a small surface roughness (surface irregularities), may be attached to these surfaces, either in conjunction with an airtight sheet or on its own. However, even without attachment, if conditioned air is continuously flowed for a while, it will be purified by multiple filter units and air purifiers 90, and then discharged outside by the exhaust fan of the heat exchange ventilation unit 60 or the ceiling-mounted ventilation fan 81, after which purified conditioned air will circulate within building 2.

[0034] The conditioned air that has passed through the air conditioning duct B31 is blown out from the outlet 42 at the entrance 13, and the airflow rate is set to 100 m³. 3 / h~200m 3 The motors of the adjustable blower fans 45 and 46 are operated at a rate of / h, and the conditioned air drawn in by the fans is blown out from the outlet 40 in room A23 and the outlet 41 in room B24, thereby providing air conditioning and ventilation to the entrance 13, rooms A23 and B24. In other words, approximately 1500 m generated within the air conditioning unit 10 3 For each room and space, the conditioned air, purified by multiple filters and an air purifier 90, is kept within approximately 5K during cooling and 10K during heating, relative to the temperature of each room and space at a rate of approximately 5K / h. This conditioned air is then blown out by the air blower 17 through the air conditioning air passages A30 and B31, which are surrounded by rooms and spaces, and out of outlets 40, 41, and 42 to rooms A23, room B24, and the entrance 13. As a result, even after passing through the air conditioning air passages A30 and B31, there is almost no temperature gradient. A large volume of purified conditioned air, kept within approximately 5K during cooling and 10K during heating relative to the temperature of each room and space, is blown out from outlets 40, 41, and 42, resulting in a very comfortable and uniform temperature and excellent air quality throughout the building 2. Furthermore, as described above, a large volume of purified conditioned air passes through the air conditioning ducts A30 and B31, with a temperature of approximately 5K during cooling and approximately 10K during heating relative to the temperature of the surrounding room and space. Therefore, condensation does not occur inside or outside the air conditioning ducts, and in particular, moisture, dust, and bacteria are less likely to accumulate inside the air conditioning ducts. Blower fans were installed at outlets 40 and 41 because these outlets are further from the connection point 35 of the air conditioning air passage B31 than outlet 42, and there is a possibility that the airflow from outlets 40 and 41 may be less than the design airflow if there are structural elements such as beams or joists in between, or if the opening area of ​​the exhaust ports 50 and 51 in rooms A23 and B24 is small, which could lead to uneven temperatures between rooms and spaces, or uneven temperatures within rooms and spaces. Furthermore, if the cross-sectional area of ​​the air conditioning duct B31 is large and the air velocity within the air conditioning duct B31 is low, the specific gravity of the conditioned air will have an effect. During heating, the specific gravity is lighter, so the airflow from the vent on the second floor will be greater, warming the second floor sufficiently, but the airflow from the vent on the first floor ceiling will be less, making the first floor cold. Conversely, during cooling, the specific gravity is heavier, so the first floor will be sufficiently cool, but the second floor may be hot. Therefore, similar problems can occur with the vents installed in buildings 2 and air conditioning ventilation system 1, and when installing them, it is necessary to consider the increased noise and power consumption due to the operation of the blower fan. Furthermore, in order to allow for regular cleaning and maintenance of the air outlets 40, 41, and 42, and the blower fans 45 and 46, as well as replacement during long-term use, the structure should be designed to allow them to be removed from rooms A23, B24, and the entrance 13, or an inspection hatch should be provided nearby.

[0035] The conditioned air from each room and space returns to the second-floor hall 15 via the exhaust vent 50 on the first floor, passing through the entrance 13 and staircase 14. On the second floor, it returns to the second-floor hall 15 via the exhaust vent 51 and then returns to the air conditioning unit 10 via the return vent 55. The air drawn in through the return air vent 55 (a mixture of return air from rooms and spaces and outside air introduced from outside in the second-floor hall 15) is reconditioned by the air conditioning unit 10 and supplied to each room and space. As a result, the heat and air quality of the return air are reused, leading to energy savings. Then, a portion of the air mixed with the return air from the room and space and the outdoor air introduced from outside flows into the toilet 61 through the grille 75 of the toilet 61 via the heat exchange ventilation unit 60. The air in the toilet 61, which contains moisture, odors, harmful substances, etc., undergoes total heat exchange with the outdoor air that has been purified by the filter box 70 via the heat exchange ventilation unit 60, and is discharged outside through the outdoor exhaust hood A66. A portion of the air mixed with the return air from the room and space and the outdoor air introduced from outside is then replaced as the air in the toilet 61. The purified, fresh outdoor air, after total heat exchange, is blown out from the ventilation air inlet 71 in the second-floor hall 15, mixed with the return air from the rooms and spaces in the second-floor hall 15, and flows into the air conditioning unit 10 from the return air inlet 55, where it is distributed to each room and space. When a large amount of moisture or strong odors are temporarily generated in the bathroom 80, such as during bathing, the ceiling-mounted ventilation fan 81 is operated at the highest setting to quickly discharge the moisture directly to the outside. At the same time, a portion of the air mixed with the return air from the room and space and the outside air introduced from outside is discharged through the louver 76 and replaced as the air in the bathroom 80. When the environment stabilizes, the air quality (temperature, humidity, cleanliness, etc.) inside the bathroom 80 becomes similar to that of conditioned air.

[0036] The airflow rate of each air blower 17 is determined by the volume of each room or space. The airflow rate required for air conditioning is 2.5 m³ per room. 3 At least 8 meters 3 / h or more, ideally 20m 3 A value of at least / h is desirable, and the amount of air supplied is adjusted according to the size of the room and the air conditioning load such as solar radiation. The air supply unit 17 rotates a sirocco fan (not shown) with a highly efficient DC motor (not shown), so the rotation speed of the sirocco fan (not shown) is controlled by the control unit 140 and the motor control unit 141 according to the air conditioning load, etc. The number of air blowers 17 should basically be one per air outlet. However, if there is surplus capacity in the air blowers 17 relative to the required airflow volume as described above, it is possible to increase the number of air outlets depending on the shape of the room or space. However, this can change the airflow distribution due to resistance within the air conditioning duct, causing a decrease in air velocity, which may lead to the accumulation of moisture, dust, bacteria, etc. in the air conditioning duct, and also make cleaning and maintenance difficult. Therefore, as a general rule, a 1:1 ratio is desirable. If it is absolutely necessary to provide multiple air outlets, it is necessary to provide a blower fan at each outlet or to provide an inspection opening nearby so that cleaning and replacement of the branching section can be done later.

[0037] The capacity and number of units of the air conditioning unit 20 are selected based on the air conditioning load of building 2. When selecting the capacity, it is desirable to select air conditioners, etc., that have the capacity to continuously operate the compressor (not shown) at a low frequency (around 30 Hz) with a higher COP (appropriate rated capacity, at most 100%) relative to the building's air conditioning load. This allows for continuous operation at a low frequency when stable, resulting in greater energy savings and stable temperature and humidity without hunting. In the air conditioning unit 10, it is desirable to ensure that the air drawn in from the return air vent 55 (air mixed in the second-floor hall 15 with return air from rooms and spaces and outside air introduced from outside) is thoroughly mixed with the conditioned air blown out by the air conditioning unit 20, resulting in a uniform temperature with minimal temperature differences between rooms and spaces, that is, conditioned air with a temperature difference of no more than 5K during cooling and no more than 10K during heating relative to the target temperature of each room and space. To achieve this, the airflow from the air conditioning unit 20 should be set to 50% or less of the total airflow from the multiple air blowers 17. The conditioned air is then blown through multiple air blowers 17 and air conditioning air passages to outlets installed in the ceilings and floors of each room and space, thereby providing a uniform and comfortable temperature for each room and space through air conditioning and ventilation. For example, if the floor area of ​​the building is approximately 100m 2 If the ceiling height is 2.5m, an air conditioning unit 20 with a cooling capacity equivalent to 4kW is installed, and in low-wind mode, the air conditioning airflow during cooling operation is 600m³. 3 The amount of air supplied to each room and space is 100 m³ per unit. 3 Approximately 150 m / h at medium airflow. 3Approximately / h, with strong winds of 200m 3 Set to / h, and the total airflow for 10 blowers 17 is 1000m 3 / h~2000m 3 This becomes approximately / h, which is greater than the air conditioning volume of the air conditioning unit 20, and the airflow volume of the air conditioning unit 20 is set to 30-60% of the total airflow volume (low airflow mode). The air conditioning airflow rate is the airflow rate passing through the heat exchanger (not shown) of the air conditioning unit 20. In the case of the air conditioning unit 20 having an air passage that bypasses the heat exchanger in order to avoid pressure loss due to passing through the heat exchanger, in order to blow conditioned air into each room at a large airflow rate, the airflow rate of the bypass air passage shall be excluded from the air conditioning airflow rate.

[0038] The amount of outdoor air introduced and the amount of indoor air discharged by the heat exchange ventilation unit 60, in other words, the ventilation airflow, is for a floor area of ​​approximately 100m². 2 For a ceiling height of 2.5m and a ventilation rate of 0.5 times / hour, the 24-hour ventilation airflow is 125m³. 3 Use / h. In the bathroom 80, when bathing, the exhaust airflow of the ceiling-mounted ventilation fan 81 is 80 m³. 3 Because the exhaust volume increases by approximately [number] hours, there will be a temporary over-exhaust, but this is only for a short time. The resulting negative pressure slightly increases the amount of outside air introduced into the heat exchange ventilation unit 60. As a result, the entire building 2 can introduce an appropriate amount of fresh, purified outside air while expelling moisture, carbon dioxide, odors, VOCs, dust, bacteria, etc., thus achieving energy-saving, healthy, and comfortable air conditioning and ventilation.

[0039] In summer, with a room temperature set to 25°C, the air outlet temperature of the air conditioning unit 20 during cooling operation is 15°C, which is about 10K lower than the temperature of the air drawn in from the return air vent 55 (26°C). However, after mixing with the 26°C air drawn in from the return air vent 55, the temperature becomes 21°C, which is about 5K lower than the temperature of the air drawn in from the return air vent 55. This air is then drawn into the blower unit 17 and passes through the air conditioning air duct, so there is no temperature gradient, and it is blown out from the outlet to each room and space at 21°C. When stable, the area surrounding the air conditioning air duct is an air-conditioned room and space, and the inner surface temperature of the air conditioning air duct is 22°C, close to 21°C, while the outer surface temperature is 24°C, close to the room temperature of the surrounding room and space (25°C). At a room temperature of 25°C and a relative humidity of 60%, the dew point temperature is 17°C, and no condensation forms on the outer surface of the air conditioning duct. Furthermore, when the outdoor temperature drops, the air conditioning load decreases, the air conditioning unit 20 turns off due to thermostat failure, and the compressor stops, the temperature and humidity of the air blown out by the air conditioning unit 20 will be the same as the room temperature at 25°C, and even if the relative humidity rises slightly to 80% due to the re-evaporation of condensed water that has formed on the evaporator of the air conditioning unit 20, the dew point temperature will be 21°C, and no condensation will form on the inner surface of the air conditioning duct. For comparison, in a conventional ducted air conditioning and ventilation system, the air blown out by the air conditioning unit flows directly into the duct. As a result, the blown air, which is about 10K or more lower than the intake air temperature of 26°C, flows through the duct at 15°C, cooling the inner surface of the duct to about 17°C. In this state, when the thermostat is turned off and the compressor stops, the blown air becomes 25°C with a relative humidity of 80% and a dew point of 21°C, and condensation forms on the inner surface of the duct as it passes through it.

[0040] In winter, with a room temperature set to 21°C, the outlet temperature of the air conditioning unit 20 during heating operation is 42°C, which is about 20K higher than the temperature of the air drawn in from the return air vent 55 (20°C). However, after mixing with the 19°C air drawn in from the return air vent 55, the temperature becomes 30°C, which is about 10K higher than the temperature of the air drawn in from the return air vent 55. Because the air passes through the air conditioning air duct via the blower unit 17, there is no temperature gradient, and the air is blown out at 30°C into each room and space from the outlet. When stable, the area surrounding the air conditioning air duct is an air-conditioned and ventilated room or space, and the inner surface temperature of the air conditioning air duct is 28°C, close to 30°C, while the outer surface temperature is 23°C, close to the room temperature of the surrounding room or space (21°C). The temperature and humidity of the air blown out from the air blower unit 17 are 30°C, 32% relative humidity, and a dew point of 12°C, so no condensation forms on the inner surface of the air conditioning air duct. Even when the relative humidity rises to 50% due to humidification by a humidifier, the dew point is 18°C, so no condensation occurs. Furthermore, if the outdoor temperature rises, the air conditioning load decreases, the air conditioning unit 20 turns off due to thermostat failure, and the compressor stops, the temperature and humidity of the air blown out by the air blower unit 17 will be the same as the room temperature at 21°C, the relative humidity will increase to 60%, and the dew point temperature will be 12°C, so no condensation will form on the inner surface of the air conditioning air passage. Even if the relative humidity rises to 80% due to humidification by a humidifier, the dew point temperature will be 17°C, and no condensation will form. For comparison, in a conventional ducted air conditioning and ventilation system, if the ducts do not pass through the insulated space within the house, and that space is not air-conditioned, and the insulation performance of the ducts is poor, the temperature of that space will be close to the outside temperature. For example, if the outside temperature is 0°C and the space temperature is 2°C, the air blown out by the air conditioning unit flows directly into the ducts. As a result, the blown air flows at 40°C, which is about 20K or more higher than the intake air temperature of 20°C. With a relative humidity of 20%, the dew point temperature becomes 13°C, and if the inner surface temperature of the duct falls below 13°C, condensation will form on the inner surface of the duct. In this state, if the thermostat is turned off and the compressor stops, the blown air will be 21°C with a relative humidity of 60% and a dew point temperature of 13°C, and condensation will occur similarly. When a humidifier is used to increase the relative humidity, the amount of condensation increases even further.

[0041] Air volume of air conditioning unit 20: 600 m³ 3 From / h, the total airflow of the multiple air blowers 17 is 1500 m³. 3 The / h is significantly higher, approximately 1500m 3For each room and space, conditioned air is blown into the room or space at a temperature of approximately 5K during cooling and approximately 10K during heating, ensuring that the room and space temperatures remain stable for extended periods. Furthermore, when determining the capacity of the air conditioning unit 20, an air conditioner with the capacity to continuously operate the compressor (not shown) at a lower frequency with a higher COP (appropriate rated capacity, at most 100%) relative to the building's air conditioning load is selected. Therefore, to save energy, the set temperature of the air conditioning unit 20 is set slightly lower (within approximately 5K during cooling) and slightly higher (within approximately 10K during heating) than the average temperature of the room or space, so that the compressor (not shown) operates at a low frequency for extended periods when the temperature is stable. Because it is a highly airtight and well-insulated house, the average temperature of the room and space, the temperature of the air drawn in from the return air vent 55 (intake), and the temperature of the intake air of the air conditioning unit 20 are almost equal. Therefore, for a long period of time, the temperature of the intake air of the air conditioning unit 20 is slightly higher (during cooling) or slightly lower (during heating) than the set temperature. As a result, the compressor operates at a low frequency with the thermostat ON, so there is no temperature and humidity hunting due to thermostat ON / OFF, and no low COP during compressor startup. This results in an energy-efficient, comfortable, and uniform temperature and humidity throughout the entire building 2.

[0042] Especially during cooling operation in the summer, the air conditioning unit 20 remains in a thermo-ON state with a small temperature difference for a long period of time, and the compressor (not shown) operates continuously. As a result, the surface temperature of the evaporator, the so-called evaporation temperature, falls below the dew point temperature of the intake air, causing moisture from the intake air to condense on the evaporator. With prolonged operation, the amount of dehumidification removed increases, the absolute humidity of the discharged air decreases for a long period of time, the absolute humidity of the conditioned air also decreases, and the relative humidity in the air conditioning duct, room, and space through which the conditioned air flows also decreases. For example, during cooling operation in summer with an outdoor temperature of approximately 35°C and a relative humidity of approximately 40%, when the room temperature is stable at a set temperature of 25°C, the intake air temperature of the air conditioning unit 10 becomes approximately 26°C due to the temperature gradient in the return air path and the merging of the outdoor air at approximately 30°C that has exchanged heat with the indoor air, relative to the average temperature of the room or space of 25°C. If the set temperature of the air conditioning unit 20 is set to 22-24°C, which is approximately 2-4K lower than the intake air temperature of 26°C, the air conditioning unit 20 will remain in a thermo-ON state with a small temperature difference for a long time, the compressor (not shown) will continue to operate at a low frequency, the amount of dehumidification removed will increase, and the relative humidity in the air conditioning air path, room, or space, where the conditioned air with low absolute humidity flows, will also decrease to 40% or less. Normally, during air conditioner cooling operation, condensed water forms on the evaporator when the thermostat is ON. When the thermostat is OFF, the compressor stops and the evaporation temperature rises, causing the condensed water to re-evaporate due to the intake air, increasing the absolute humidity of the discharged air and resulting in air with extremely high absolute humidity. However, with this air conditioning and ventilation system 1, the frequency of turning the thermostat OFF is reduced, making it less likely for the air to become like that.

[0043] Even if the capacity of the air conditioning unit 20 is determined as described above, changes in the air conditioning load due to the outside temperature, for example, during the rainy season when the temperature is not very high but the humidity is muggy (temperature 27°C, relative humidity 80% or higher), if the air conditioning unit 20 is operated in cooling mode, because general air conditioners have a high sensible heat capacity, the temperature drops relatively quickly and the thermostat turns off, resulting in a small amount of dehumidification being removed, the absolute humidity of the discharged air not decreasing, the absolute humidity of the conditioned air not decreasing, and the relative humidity in the air conditioning duct through which the conditioned air flows, the room, and the space not decreasing, so that only the temperature drops and the relative humidity actually increases. In such cases, the operating mode of the air conditioning unit 20 is set to reheat dehumidification operation, and the heat exchanger 91 functions as an evaporator through which a low-temperature, low-pressure refrigerant flows, while the heat exchanger 92 functions as a reheater through which a medium-temperature, medium-pressure refrigerant flows. As a result, the discharged air is at a temperature higher than the intake air temperature and has low absolute humidity, and is blown out from the outlet 87. The temperature does not decrease, but the absolute humidity does. As a result, the reheat dehumidification thermostat in the air conditioning unit 20 remains ON for a long period of time, and the compressor (not shown) operates continuously. This causes the surface temperature of the heat exchanger 91 (evaporator), the so-called evaporation temperature, to fall below the dew point temperature of the intake air. Consequently, moisture from the intake air condenses on the heat exchanger 91 (evaporator), and the amount of dehumidification removed increases with prolonged operation. This leads to a continuous decrease in the absolute humidity of the discharged air, a decrease in the absolute humidity of the conditioned air, and a decrease in the relative humidity of the air conditioning duct, room, and space through which the conditioned air flows. In this embodiment, a heat pump type is used in which a refrigerant is circulated through the heat exchanger 92 (reheater), but a heat exchanger that circulates hot water generated using a fuel cell or the like as a heat source may also be used as the reheater. As a result, the conditioned air passing through the air conditioning duct contains less dust, bacteria, and moisture, and condensation is less likely to occur inside the air conditioning duct. Therefore, even during long periods of operation, moisture and mold spores are less likely to adhere to accumulated dust, reducing the likelihood of mold growth.

[0044] In this embodiment, the exhaust duct A65, supply duct A68, supply duct B72, and discharge duct 36 are also designed to minimize moisture generation due to condensation and mold growth due to dust accumulation, thereby reducing the frequency of maintenance such as regular cleaning and replacement of the ducts. Generally, if there is a nonwoven fabric such as polypropylene on the inner surface of a duct, the nonwoven fabric is breathable and moisture-permeable, and dust, moisture, and mold spores can adhere to the insulation material inside the nonwoven fabric, potentially leading to mold growth. Furthermore, if the insulation material is glass wool, moisture can seep into the gaps between the fibers due to its surface tension and capillary action. Even after drying, the fibers will stick together, preventing them from trapping the large amount of air necessary for insulation, thus reducing their insulating function. Therefore, once condensation occurs inside the duct, it becomes even more prone to further condensation. Furthermore, because nonwoven fabrics have a high surface roughness (unevenness on the surface), if the air passing through them contains a lot of dust or other particles for any reason, these particles tend to get caught in the nonwoven fabric and accumulate. Furthermore, when cleaning the inside of a duct using a machine with rotating brushes or similar objects, the brushes may get caught on the uneven surface of the non-woven fabric, potentially damaging it. In such cases, by using an internal covering material such as polypropylene film, flexible polyvinyl chloride film, or PET film with a thickness of approximately 0.1 mm, which is non-permeable, non-moisture-permeable, and has a low surface roughness (surface irregularities) compared to polyester nonwoven fabric, on the inner surface of the ducts through which conditioned air passes, inside the insulation material such as glass wool in the exhaust duct A65, supply duct A68, supply duct B72, and discharge duct 36, dust, moisture, mold spores, etc., cannot enter the glass wool from the inner surface of the ducts, making it difficult for mold to grow there. Furthermore, dust and other particles do not easily accumulate on the surface, and since it does not contain moisture, mold and other particles do not easily grow. This reduces the frequency of maintenance such as regular cleaning and replacement of the inside of the ducts, and prevents dust, mold, bacteria, and unpleasant odors from entering the building 2, thus creating a healthy and comfortable space.

[0045] Regarding the supply air duct B72, the intrusion of dust and mold spores is suppressed by passing through the outside air purification filter 69, but the collection efficiency is not 100%. Although condensation is suppressed by total heat exchange with indoor air in the heat exchange element 63, condensation is likely to occur during severe winter or extreme heat. Therefore, by using the ventilation duct described above, the risk of mold growth inside the duct is reduced, and dust, mold, bacteria, and unpleasant odors from inside the duct are less likely to enter the building 2. Regarding the supply air duct A68, by using the ventilation duct described above, dust, mold spores, and moisture are less likely to adhere to the inside of the supply air duct A68, the progression of dirt is slowed, and condensation due to contact with outside air at the outdoor supply air hood 67 is also reduced. With regard to exhaust duct A65, by using the ventilation duct described above, dust, mold spores, moisture, etc. are less likely to adhere to the inside of exhaust duct A65, slowing down the progression of dirt buildup. In addition, dust, mold spores, moisture, etc. are more easily discharged from the outdoor exhaust hood A66, and condensation caused by contact with the outside air at the outdoor exhaust hood A66 is also reduced.

[0046] When the temperature is set in the temperature setting unit 125 of the room temperature controller 120 and the air conditioning and ventilation system 1 is operated, the air conditioning unit 20, multiple blowers 17, air purifier 90, and heat exchange ventilation unit 60 are properly controlled and operated by the air conditioning unit controller 110, as follows. The temperature, humidity, and dust concentration of the conditioned air in the mixing section 95 within the air conditioning unit 10 are detected by the temperature sensor 111 of the air conditioning unit controller 110, the humidity sensor 112 for detecting the humidity of the air, and the dust sensor 113 for detecting the mass concentration of dust in the air. The temperature of the air drawn in from the return air port 55 (air mixed in the second-floor hall 15 with return air from rooms and spaces and introduced outside air) is detected by the temperature sensor 121 of the room temperature controller 120, the humidity sensor 122 for detecting the humidity of the air, and the dust sensor 123 for detecting the mass concentration of dust in the air. Data is sent to the respective control units 114, 124, and data is sent from control unit 124 to control unit 114 via the signal line 150. Furthermore, the temperature data set by the temperature setting unit 125 of the room temperature controller 120 is sent to the control unit 124, and the data is sent from the control unit 124 to the control unit 114 via the signal line 150.

[0047] The control unit 114 compares the temperature detected by the temperature sensor 121 with the temperature set by the temperature setting unit 125 to determine the operating mode of the air conditioning unit 20 to either cooling or heating. If cooling operation is selected, the control unit 114 compares the humidity detected by the humidity sensor 122 with a threshold value. If the humidity is lower than the threshold, it is set to cooling operation; if the humidity is higher than the threshold, it is set to reheat dehumidification operation. Furthermore, the control unit 114 estimates the average temperature of the room and space from the temperature of the air drawn in from the return air port 55 detected by the temperature sensor 121, and estimates the average temperature of the air in the air conditioning ducts A30 and B31 from the temperature of the conditioned air in the mixing unit 95 detected by the temperature sensor 111, and adjusts the control unit 114 so that the average temperature of the room and space becomes the set temperature, and sets the average temperature of the room and space as the average temperature of the air surrounding the air conditioning ducts, and adjusts the control unit 114 accordingly. The set temperature of the air conditioning unit 20 and the airflow rate of the air blower unit 17 are determined so that the average temperature of the air in the air conditioning duct is within 5K during cooling and within 10K during heating. The operating mode of the air conditioning unit 20 (cooling / heating / reheat dehumidification) and the set temperature and airflow rate of the air blower unit 17, which were determined earlier, are sent as signals to the control unit 130 of the air conditioning unit 20 via the signal line 151, and signals are also sent as signals to the control units 140 of the multiple air blower units 17 via the signal line 153.

[0048] Regarding the airflow volume of the air blower 17, for example, if the floor area of ​​the building is approximately 100m² 2 The ceiling height is 2.5m, the cooling capacity is equivalent to 4kW, and the air conditioning volume during low-wind mode cooling is 600m³. 3 When an air conditioning unit 20 with a value of / h is installed, the air blowing unit 17 will have an airflow of 100m³ per unit at low airflow. 3 Approximately / h, 300m at maximum airflow 3 Ten units with a capacity of / h were installed, and the total airflow from the ten blowers 17 was 1000m³. 3 / h~2000m 3 Set to / h, and such that the airflow is greater than the air conditioning airflow of the air conditioning unit 20, and the total airflow is 30-60% of the airflow of the air conditioning unit 20 (low wind mode), 100m 3 / h to 300m 3 The setting is determined between / h, and during operation of this air conditioning and ventilation system 1, the airflow rate is not set to 0, and the airflow velocity of the conditioned air in the air conditioning air passage is always controlled to be 0.5 m / s or higher. Generally, the evaporation rate of water due to the movement of air above the water surface Y (kg / m³) 2 s) is the saturated vapor pressure at the water surface Xw (kg / m³). 3 ), the amount of water vapor in the air above the water surface Xa (kg / m³ 3), and depending on the air movement speed V (m / s) above the water surface, Y = K·V(Xw - Xa), which is proportional to the movement speed. When this is applied to an air conditioning duct, the amount of moisture that condenses on the inner surface of the air conditioning duct evaporates increases in proportion to the airflow velocity of the conditioned air. Therefore, in this air conditioning ventilation system 1, even if condensation occurs inside the air conditioning duct, the system is designed to keep the conditioned air flowing at all times, rather than setting the airflow to zero, in order to evaporate it as quickly as possible.

[0049] The control unit 130 of the air conditioning unit 20, having received signals for the operating mode and set temperature, determines the operating status of the compressor and other components of the air conditioning unit 20 in conjunction with the intake temperature data from the intake temperature sensor 133, instructs the blower control unit 131 and the louver control unit 132 to set the rotation speed of the blower 90 and the angle of the louvers 94, respectively, and sends a signal to the control unit 135 of the air conditioning outdoor unit 18 via the signal line 152. Upon receiving a similar signal, the control unit 135 of the air conditioning outdoor unit 18 instructs the compressor control unit 136 and the outdoor fan control unit 137 to increase the rotational speed of the compressor and the rotational speed of the outdoor fan, respectively. Upon receiving the airflow signal, the control units 140 of the multiple air blowers 17 instruct the respective motor control units 141 to rotate at the respective motor speeds. Furthermore, the control unit 114 compares the dust concentration detected by the dust sensor 123 with a threshold value. If the concentration is lower than the threshold, it decides to stop the air purifier 90; if it is higher, it decides to operate the air purifier 90. It then sends a signal to the control unit 160 of the air purifier 90 via the signal line 154. Upon receiving the signal, the control unit 160 instructs the electrostatic dust collector control unit 161 to stop or operate the air purifier. Regarding the ventilation airflow of the heat exchange ventilation unit 60, the ventilation airflow setting means (not shown) of the air conditioning unit controller 110 sets a 24-hour ventilation airflow according to the size of the building 2. The control unit 114 sends a signal to the control unit 165 of the heat exchange ventilation unit 60 via the signal line 155, and the control unit 165 instructs the motor control unit 166 to rotate the fan according to that airflow. However, if the humidity and dust concentration detected by the humidity sensor 122 and dust sensor 123 are significantly higher than the threshold, the control unit 114 decides to temporarily increase the ventilation airflow beyond the 24-hour ventilation airflow and instructs the motor control unit 166 to rotate the fan accordingly.

[0050] Alternatively, for example, the control unit (not shown) of the ceiling-mounted ventilation fan 81 and the control unit 114 may be connected by a signal line, and if the humidity and dust concentration detected by the humidity sensor 122 and dust sensor 123 are significantly greater than the threshold, the control unit 114 may decide to operate the ceiling-mounted ventilation fan 81 and send a signal to the control unit (not shown) of the ceiling-mounted ventilation fan 81. Furthermore, in that case, since the exhaust from the ceiling-mounted ventilation fan 81 disrupts the supply and exhaust balance of the entire building 2, the control unit 114 may send a signal to the control unit 165 to increase the rotation speed of only the intake fan (not shown) that introduces outside air into the heat exchange ventilation unit 60 to restore the supply and exhaust balance.

[0051] For example, in summer, when the outdoor temperature is approximately 35°C and the relative humidity is approximately 40%, the temperature detected by the temperature sensor 121 of the room temperature controller 120 is 28°C, and the temperature set by the temperature setting unit 125 is 25°C, the control unit 114 initially determines the operating mode of the air conditioning unit 20 to cooling. If the humidity detected by the humidity sensor 122 is 50%, which is lower than the threshold of 70%, it then decides to operate in cooling mode. Then, the control unit 114 estimates the average temperature of the room and space to be 27°C based on the temperature of 28°C detected by the temperature sensor 121, and estimates the average temperature of the air in the air conditioning duct to be 25°C based on the temperature of 25°C detected by the temperature sensor 111. To make the set temperature 25°C equal to the average room and space temperature of 27°C, and to make the average air temperature around the air conditioning duct 27°C equal to the average room and space temperature of 27°C, the control unit 114 determines the set temperature of the air conditioning unit 20 to be 22°C, and to make the average temperature of the air in the air conditioning duct to be between 22°C and 27°C within 5K during cooling (the average temperature in the air conditioning duct at this point is 25°C), and sets the airflow rate of the air blower unit 17 to 200 m³. 3 The value is determined as / h, and signals are sent to the control unit 130 of the air conditioning unit 20 via signal line 151, and to the control units 140 of the multiple air blowers 17 via signal line 153. Upon receiving the operating mode "cooling" and the set temperature "22°C", the control unit 130 of the air conditioning unit 20, along with the intake temperature data of "28°C" from the intake temperature sensor 133, instructs the air conditioning unit 20 to perform the following operations: for example, set the rotation speed of the blower 90 to 900 r / min, the angle of the louvers 94 from horizontal to 45 degrees downward, operate the compressor at a medium frequency of 52 Hz, and set the rotation speed of the outdoor blower to 600 r / min. Air flow: 200m 3 Upon receiving the signal " / h", the control units 140 of the multiple blower units 17 instruct their respective motor control units 141 to, for example, set the rotation speed of each motor to 1200 r / min.

[0052] For example, during the rainy season, if the outdoor temperature is approximately 27°C and the relative humidity is approximately 80%, the temperature detected by the temperature sensor 121 of the room temperature controller 120 is 24°C, and the temperature set by the temperature setting unit 125 is 22°C, the control unit 114 will initially determine the operating mode of the air conditioning unit 20 to cooling. However, if the humidity detected by the humidity sensor 122 is 80%, which is higher than the threshold of 70%, it will then decide to operate in reheat dehumidification mode. Then, the control unit 114 estimates the average temperature of the room and space to be 23°C based on the temperature of 24°C detected by the temperature sensor 121, and estimates the average temperature of the air in the air conditioning duct to be 20°C based on the temperature of 20°C detected by the temperature sensor 111. To make the set temperature 22°C, and to make the average temperature of the room and space of 23°C the average temperature of the air surrounding the air conditioning duct of 23°C, the control unit 114 determines the set temperature of the air conditioning unit 20 to be 22°C, so that during cooling the average temperature of the air in the air conditioning duct is between 18°C ​​and 23°C within 5K (the average temperature in the air conditioning duct at this point is 20°C), and sets the airflow rate of the air blower unit 17 to 150 m³. 3 The value is determined as / h, and signals are sent to the control unit 130 of the air conditioning unit 20 via signal line 151, and to the control units 140 of the multiple air blowers 17 via signal line 153. Upon receiving the operating mode "reheat dehumidification" and the set temperature "22°C", the control unit 130 of the air conditioning unit 20, along with the intake temperature data of "23°C" from the intake temperature sensor 133, instructs the air conditioning unit 20 to perform the following operations: for example, set the rotation speed of the blower 90 to 600 r / min, the angle of the louvers 94 from horizontal to 45 degrees downward, operate the compressor at a low frequency of 32 Hz, and set the rotation speed of the outdoor blower to 600 r / min. Air volume: 150m 3 Upon receiving the " / h" signal, the control units 140 of the multiple blower units 17 instruct their respective motor control units 141 to, for example, set the rotation speed of their respective motors to 900 r / min.

[0053] For example, if the outdoor temperature in winter is approximately 7°C, the temperature detected by the temperature sensor 121 of the room temperature controller 120 is 16°C, and the temperature set by the temperature setting unit 125 is 20°C, the control unit 114 will determine the operating mode of the air conditioning unit 20 to be heating. Then, the control unit 114 estimates the average temperature of the room and space to be 17°C based on the temperature of 16°C detected by the temperature sensor 121, and estimates the average temperature of the air in the air conditioning duct to be 25°C based on the temperature of 25°C detected by the temperature sensor 111. To make the set temperature 20°C equal to the average room and space temperature of 17°C, and to make the average air temperature around the air conditioning duct 17°C equal to the average room and space temperature of 17°C, the control unit 114 determines the set temperature of the air conditioning unit 20 to be 22°C, and to make the average temperature of the air in the air conditioning duct equal to 17°C, within 10K during heating (the average temperature in the air conditioning duct at this point is 25°C), and sets the airflow rate of the air blower unit 17 to 200 m³. 3 The value is determined as / h, and signals are sent to the control unit 130 of the air conditioning unit 20 via signal line 151, and to the control units 140 of the multiple air blowers 17 via signal line 153. Upon receiving the operating mode "heating" and the set temperature "22°C", the control unit 130 of the air conditioning unit 20, along with the intake temperature data of "16°C" from the intake temperature sensor 133, instructs the air conditioning unit 20 to perform the following operations: for example, set the rotation speed of the blower 90 to 900 r / min, the angle of the louvers 94 downwards from horizontal to 60 degrees, operate the compressor at a medium frequency of 52 Hz, and set the rotation speed of the outdoor blower to 900 r / min. Air flow: 200m 3 Upon receiving the signal " / h", the control units 140 of the multiple blower units 17 instruct their respective motor control units 141 to, for example, set the rotation speed of each motor to 1200 r / min.

[0054] Thereafter, at a certain point, the control unit 114 determines the set temperature of the air conditioning unit 20 and the airflow rate of the air blowers 17 so that the average temperature of the room or space reaches the set temperature, and the average temperature of the air inside the air conditioning air duct is within 5K during cooling and within 10K during heating relative to the average temperature of the air surrounding the air conditioning air duct. It then sends signals to the control unit 130 of the air conditioning unit 20 via the signal line 151 and to the control units 140 of the multiple air blowers 17 via the signal line 153. Upon receiving signals for the operating mode and set temperature, the control unit 130 of the air conditioning unit 20, along with the intake temperature data from the intake temperature sensor 133, instructs the operating status of the compressor and other components of the air conditioning unit 20, such as the rotation speed of the blower and the angle of the louvers, the operating frequency of the compressor, and the rotation speed of the outdoor blower. Upon receiving the airflow signal, the control units 140 of the multiple air blowers 17 instruct the respective motor control units 141 to rotate at the respective motor speeds. The above process is repeated until the air conditioning unit controller 110 stops the unit.

[0055] During operation, the blower unit 17, although its rotation speed is controlled, never stops, and the sirocco fan continues to rotate, continuously supplying air to the air conditioning duct. This is because it keeps the air in the air conditioning duct moving, sweeping out surface dust and other debris from the outlet, evaporating moisture, and effectively equalizing the temperature and humidity throughout the building 2, including both inside and outside the air conditioning duct. Furthermore, it is desirable that the air conditioning unit controller 110 be operated continuously 24 hours a day, 365 days a year, except for shutdowns due to maintenance or when the unit is unoccupied for extended periods. The blower unit 17 is rotated by a highly efficient DC motor (not shown), so it is inherently energy-efficient, and power consumption decreases further in proportion to the rotation speed. However, the compressor of the outdoor air conditioning unit 18 accounts for a large proportion of the power consumption of this system. Therefore, even with continuous operation, unless the air conditioning load is extremely high due to the outside temperature or sunlight, the compressor will operate at a low frequency or stop when the system is stable. This is because even if the blower unit 17 continues to operate, the system's power consumption is very low, while it is very effective in preventing the adhesion and accumulation of dust, mold, and moisture in the air conditioning air passages. Furthermore, if it is not possible to reconcile the requirements of "setting the average temperature of the room or space to the set temperature" and "ensuring that the average temperature of the air inside the air conditioning duct is within 5K during cooling and within 10K during heating relative to the average temperature of the air surrounding the air conditioning duct," the control is normally configured to prioritize "setting the average temperature of the room or space to the set temperature" from the user's perspective. However, when the air conditioning load is high at the start of operation, for example, it is possible to change to a mode that prioritizes "ensuring that the average temperature of the air inside the air conditioning duct is within 5K during cooling and within 10K during heating relative to the average temperature of the air surrounding the air conditioning duct" by using a hidden operation provided in the air conditioning unit controller 110 (for example, setting the set temperature to the minimum or maximum temperature at the start of operation). However, in principle, the amount of moisture, dust, bacteria, etc. in the air passing through the air conditioning duct is significantly less than in a normal ducted air conditioning and ventilation system. By installing an air conditioning unit 20 with appropriate capacity in a highly airtight and well-insulated building 2, and setting the total airflow from the air supply unit 17 to be greater than the air conditioning airflow of the air conditioning unit 20, and setting 30-60% of the total airflow as the air conditioning airflow of the air conditioning unit 20 (low wind mode), when the system is running stably for a long period of time, the temperature of the air discharged from the air conditioning unit 20 becomes almost equal to the temperature of the intake air, and the average temperature of the air in the air conditioning duct becomes almost equal to the average temperature of the air surrounding the air conditioning duct. As a result, dust and other particles are less likely to accumulate in the air conditioning duct, and it is less likely to contain moisture, making it difficult for mold and other microorganisms to grow.

[0056] In this embodiment, building 2 is constructed with ceiling insulation and floor insulation specifications to reduce construction time and the area required for insulation work. Air conditioning ducts are provided in the inter-floor space between the first and second floors, and air outlets are provided in the ceiling 32 of the first floor and the floor 33 of the second floor. However, in order to increase the usable space within building 2 and improve the durability of the building's structure itself, roof insulation and foundation insulation specifications are used, and the attic space 9 and underfloor space 12 are made into insulated spaces, where the air conditioning unit 10 and air conditioning ducts are installed, and the ceiling 3 of the second floor and the floor 33 of the first floor Alternatively, an air outlet can be installed in the floor 5, and conditioned air can be blown out from the air conditioning unit 10 through the air conditioning ducts in the attic space 9 and underfloor space 12. Depending on the temperature distribution and obstacles in each room and space, the air outlets can be selected to be located in the floor or ceiling. Since the attic and underfloor spaces also become insulated spaces, the area in the building 2 can be made uniform in terms of air quality. This allows the attic and underfloor spaces to be used as storage rooms, closets, or hobby rooms for music and other purposes, while preventing condensation, dust accumulation, and mold growth in the air conditioning ducts. However, since both the attic space 9 and the crawl space are close to the building envelope, the air conditioning load will increase due to solar radiation load from the roof 8 above the attic space 9 and heat transfer load from the foundation 4 in the crawl space 12. Therefore, it is necessary to ensure proper insulation and airtightness without any thermal gaps, and to consider the increase in air conditioning load when selecting air conditioning units. Furthermore, even with roof insulation and foundation insulation specifications, if air conditioning ducts are not provided in the insulated attic space 9 and underfloor space 12, if air outlets are provided in the attic space 9 and underfloor space 12 and the air supply unit 17 and the air outlets are connected by air conditioning ducts, etc., the space through which the air conditioning ducts etc. pass will be air-conditioned. This prevents condensation inside and outside the air conditioning ducts etc., and prepares for the risks of changes in air conditioning load and deterioration of insulation materials over time. In addition, since the entire building 2 is air-conditioned, the entire building 2 will have a uniform temperature with little temperature difference between rooms and spaces, and heat transfer will be reduced, resulting in energy savings while maintaining a comfortable space. In particular, the attic space 9 and underfloor space 12 are large spaces facing the exterior walls of building 2, so this further improves the insulation of building 2 and results in energy-saving air conditioning. In this embodiment, the air conditioning unit 20 is described as a so-called indoor air conditioning unit in which heat exchangers 91, 92 and a blower 90 are housed in an integrated casing, the blower unit 17 is described as a so-called blower, and the air conditioning unit 10 is described as a relatively compact room of about 1 tsubo (approximately 3.3 square meters) surrounded on all four sides by insulated walls, which is the air conditioning room. However, the air conditioning unit 10 may be described as a casing enclosed in sheet metal or the like, with only a heat exchanger provided as the air conditioning unit 20 and multiple blowers provided as the blower unit 17. The multiple blowers may then pass a portion of the air drawn into the air conditioning unit 10 through the heat exchanger to become blown air, and a portion of the air drawn into the air conditioning unit 10 may be bypassed without passing through the heat exchanger. The bypass air and blown air are then mixed within the casing to create conditioned air, which is then blown into each room and each space. In this case as well, it is desirable that the air conditioning unit 20, the multiple blower units 17, and the air purifier 90 be of a size and structure that facilitates maintenance and work such as cleaning.

[0057] As an example of this embodiment, the floor area of ​​building 2 is approximately 100 m². 2 Assuming a ceiling height of 2.5m, in order to maintain a uniform temperature and energy-efficient air conditioning and ventilation in each room or space, the total airflow volume to each room or space is 1500m³. 3 If set to / h, the circulation rate will be 6 times / h, and the processing airflow of the air purifier 90 will also be 1500m³. 3 With a circulation rate of 6 times per hour, this rational system allows for air purification throughout Building 2, including within the air conditioning ducts, by supplying a large volume of air for the air conditioning and ventilation of the entire building. Generally, electric dust collectors have advantages over HEPA filter types, such as lower airflow resistance, lower power consumption and operating noise in the air blower unit 17, less clogging, and a longer lifespan. However, they also have disadvantages, such as lower transient dust collection efficiency and the generation of by-products like ozone. Conversely, HEPA filter systems generally have disadvantages such as high airflow resistance, high power consumption and operating noise in the air blower unit 17, a tendency to clog, and a short lifespan. On the other hand, they have advantages such as high transient dust collection efficiency, the ability to capture finer particles in a short time, and the absence of by-products such as ozone. In this embodiment, dust and mold spore-level particles to be removed can be removed by any method if the system is operated for a long period of time. Therefore, the method should be selected based on the type and extent of other harmful substances to be removed, the shape of the machine, the shape of the air conditioning unit 10, the airflow velocity inside the air conditioning unit 10, the frequency of maintenance, and the points that the user considers important. In particular, with a HEPA filter system, passing such a large volume of air through it would require a significant improvement in the performance (PQ, etc.) of the air blower 17, and would also increase noise. However, in this embodiment, multiple air blowers 17, for example, 10 air blowers 17, are used to circulate air within the building 2, thus mitigating the need to improve the performance of each individual air blower 17. Furthermore, increasing the airflow per unit is easily achieved by increasing the rotation speed of the DC motor in each air blower 17. The increase in power consumption is less compared to AC motors, allowing for a rational, energy-saving, and highly efficient way to increase the total airflow and purify the air inside the building 2. Furthermore, if the size of the return air vent 55 of the air conditioning unit 10 is set so that the airflow velocity through the HEPA filter is 1 m / s or less, the increase in noise can be suppressed. However, increasing the size of the air conditioning unit 10 is relatively easy if there is sufficient space within the building 2.

[0058] In this embodiment, multiple filter units and an air purifier 90 are arranged in the following order from the upstream of the air passage in the air conditioning unit 10 toward the air conditioning air passage A30 and then the air conditioning air passage B31: return air port filter 85 (efficiency of 80% or more), air conditioning unit filter 86 (low efficiency), pre-filter for the air purifier 90, and air purifier 90 (capable of capturing particles as small as 0.3 μm). A blower unit filter 87 (efficiency of 30%) is provided immediately before the air conditioning air passage A30. Except for the blower unit filter 87, the filter units and air purifier 90 are circulating. If the air passing through the path is efficiently purified and maintenance is easy, it may be installed in the middle of the circulation path. Furthermore, regarding the arrangement of the filter unit and the air purifier 90 in the circulation path and within the air conditioning unit 10, if larger particles that can be captured or with low capture efficiency are placed upstream, and smaller particles that can be captured or with high capture efficiency are placed downstream, the pressure loss between the filter unit and the air purifier will not increase rapidly, resulting in energy savings and a reduction in the frequency of maintenance such as cleaning. Furthermore, the primary purpose of the multiple filter units is to remove dust and other particles that are one of the conditions for mold growth, while the primary purpose of the air purifier 90 is to directly purify the air to make the living space more comfortable, and it is also possible to capture mold spores and PM2.5 level particles. Therefore, the filter units and the air purifier 90 should be positioned with these purposes in mind. Furthermore, the air blower filter 87 of this embodiment is effective for purifying the conditioned air and promoting the mixing of the conditioned air in the mixing section 95 upstream of the air blower filter 87. In addition, since the filter section is provided immediately before the conditioned air passage A30, it is effective in reliably preventing the intrusion of dust and other particles even if there is leakage in the air passage or other filter sections or the air purifier 90 upstream. For example, it is reasonable to leave the blower filter 87 in its original position, taking into account the balance between maintenance frequency and the degree of mixing promotion, and to add a pre-return air filter (efficiency 30%) upstream of the return air filter 85, so that the order is pre-return air filter (efficiency 30%), return air filter 85 (efficiency 80% or more), air conditioning filter 86 (low efficiency), pre-filter for air purifier 90, air purifier 90 (capable of capturing particles as small as 0.3 μm), and blower filter 87. Furthermore, regarding the air conditioning filter 86 (which has low efficiency), it is important to note that there is an airflow path in the circulation circuit that bypasses the air conditioning filter 86, and increasing the efficiency of the air conditioning filter 86 increases the amount of air bypassed, which reduces the amount of airflow to the air conditioning unit 20. Furthermore, in this embodiment, within the airtight and insulated air conditioning unit 10, an air conditioning unit 20 with a reheat dehumidification function and a mixing unit 95 are provided almost directly in front of the air blower 17 at the inlet of the air conditioning air passage A30. This allows conditioned air with reduced absolute humidity and appropriate temperature and humidity to be directly blown into the air conditioning air passages A30 and B31, thereby preventing condensation within the air conditioning air passages.

[0059] As described above, the air conditioning unit 10, which is equipped with an intake section, an air conditioning section 20, and a blower section 17, produces conditioned air at a temperature of 5K or less during cooling and 10K or less during heating, which is then blown into the air conditioning air passages A30 and B31 at a large volume. This air is then blown out from the outlets 40, 41, and 42 in rooms A23, B24, and the entrance 13, providing air conditioning to the rooms and upper and lower spaces within the highly airtight and well-insulated building 2. As a result, the building 2 tends to have a comfortable and uniform temperature and humidity, even in spaces with high air conditioning loads such as solar radiation loads. Furthermore, because the air conditioning air passages are surrounded by air-conditioned rooms, spaces, or insulating materials, condensation inside and outside the air conditioning air passages during cooling, and condensation inside the air conditioning air passages during heating, are unlikely to occur. Furthermore, the return air filter 85 (filter section A) installed at the intake of the air conditioning unit 10 that produces conditioned air purifies all the air drawn into the air conditioning unit 10. The air drawn into the air conditioning section 20 is further purified by the air conditioning section filter 86 (filter section B), and the air blower filters 87 (filter section C) of the multiple air blowers 17 purify all the air drawn into the air conditioning unit 10 without any leakage. This air is then discharged into the air conditioning air passages A30 and B31, purifying the air inside the building 2. This further reduces the risk of dust and other particles, which are one of the conditions for mold growth, entering the air conditioning air passages. Additionally, since all filter sections A, B, and C are located inside the air conditioning unit 10, maintenance such as cleaning is easy. Furthermore, by installing a heat exchange ventilation unit 60 and an outside air purification filter 69 in the outdoor air intake path to purify the incoming outdoor air, and by discharging a portion of the conditioned air from the room and space, along with the air from the dirty zone, to the outside through an indoor air exhaust path that leads from the so-called dirty zone (toilet, washroom, etc.) without an air outlet, the purified outdoor air is introduced, and the building 2 can be ventilated while expelling the air inside the building 2 that is contaminated with dust and moisture. Furthermore, within Building 2, a ceiling-mounted ventilation fan 81 is installed to expel air from the bathroom 80 and kitchen, where moisture is generated not by human activity but by bathing and cooking, to the outside. This prevents such moisture from accumulating within Building 2 and from being included in the conditioned air, thus preventing it from flowing into the conditioned air duct. As a result, dust, moisture, and condensation do not accumulate or stagnate in the air conditioning ducts A30 and B31, making it difficult for mold to grow and for odors caused by bacteria to develop. This prevents dust, mold, bacteria, and unpleasant odors from entering Building 2, creating a healthy and comfortable space. Furthermore, even after long-term use, maintenance such as cleaning of the air conditioning ducts is unnecessary, ensuring that Building 2 is always equipped with healthy and comfortable air conditioning and ventilation.

[0060] Furthermore, the air blower 17 of the air conditioning unit 10 draws a portion of the air drawn in from the return air port (intake) 55 into the air conditioning unit 20, where it is conditioned and then blown out. Some of the air drawn in from the intake is not drawn into the air conditioning unit 20, but instead merges with the air blown out from the air conditioning unit 20 in the mixing unit 95, where it is mixed. By adjusting the airflow of the air conditioning unit 20, the set temperature, the airflow of the blower 17, etc., it is possible to stably produce a large volume of conditioned air within 5K during cooling and within 10K during heating, relative to the temperature of the air surrounding the air conditioning air passages A30 and B31, in an energy-efficient manner. Since this conditioned air is passed through the air conditioning air passages, condensation is less likely to occur in the air conditioning air passages. Furthermore, the airflow from the blower unit 17 is significantly greater than the airflow from the air conditioning unit 20. This allows for the stable and energy-efficient production of large volumes of conditioned air within 5K during cooling and within 10K during heating, relative to the room and space temperatures. As a result, the room and space temperatures do not fluctuate significantly, such as overshooting. The intake air temperature of the air conditioning unit 20 remains stable for extended periods, close to the set temperature. In particular, during cooling operation in summer, the air conditioning unit 20 maintains a thermostat-ON state with a small temperature difference for extended periods, and the compressor operates continuously at a low frequency. This causes the surface temperature of the evaporator, the so-called evaporation temperature, to fall below the dew point temperature of the intake air. As a result, moisture from the intake air condenses on the evaporator, and the amount of dehumidification removed increases with prolonged operation. This leads to a continuous decrease in the absolute humidity of the discharged air, and consequently, a decrease in the absolute humidity of the conditioned air. This also reduces the relative humidity in the air conditioning duct, room, and space through which the conditioned air flows, further reducing condensation in the air conditioning duct during cooling operation. Furthermore, the airflow from the air blower 17 is not zero; it is designed to continuously circulate conditioned air, so even if condensation occurs inside the conditioned air duct, it can be evaporated as quickly as possible.

[0061] Furthermore, by driving the compressor and other components of the air conditioning unit 20, the system is energy-efficient because it increases the airflow of the air blower unit 17, which has a significantly lower running cost per unit airflow, compared to the airflow of the air conditioning unit 20, which has a higher running cost per unit airflow, to create conditioned air and pass it through the air conditioning air passages A30 and B31. As an example, an air conditioner (air conditioning unit) with a cooling capacity of 4kW and a COP of 4 can circulate 1200m³ of air throughout the entire house. 3 To produce conditioned air at a rate of / h, at least 600m 3 Two air conditioners are needed at a rate of 1 / h, and if capacity is controlled and the thermostat is not turned off, the total cost will be approximately 30-40 yen / h. However, to produce conditioned air using an air conditioner (air conditioning unit) and a fan (air blower unit), one air conditioner and 200m 3Six fans with a capacity of 1 / h are needed, and assuming capacity control and no thermostat shut-off, each fan uses a DC motor and consumes approximately 5W / h of power, so the total cost is estimated to be only about 20 yen / h, roughly the same as one air conditioner. Generally, air conditioner fans are through-flow fans, so they have low static pressure and cannot blow air through ducts. Depending on the house layout, it is difficult to circulate conditioned air throughout the entire house with just two air conditioners, and in reality, more air conditioners are needed, further increasing running costs. On the other hand, blowers are axial-flow fans, so they have high static pressure and are suitable for circulating air through relatively narrow cross-sectional areas where the air velocity is high, such as in air conditioning ducts. Therefore, one air conditioner can produce conditioned air, resulting in lower running costs. Furthermore, in houses with two or more stories, the air conditioning duct through which the conditioned air flows is typically structurally partitioned and located in the inter-floor space between the first and second floors. Since the upper and lower surfaces, which occupy a large portion of the surface area of ​​the air conditioning duct, are surrounded by air-conditioned rooms and spaces, there is no need to enclose it with insulation. The front, back, left, and right sides are surrounded by insulation provided in the exterior walls, further reducing condensation in the air conditioning duct. This allows for highly efficient air conditioning and ventilation with minimal heat loss from the inlet to the outlet of the conditioned air in the air conditioning duct. Furthermore, the air conditioning unit 10 is directly connected to the air conditioning duct, and outlets 40, 41, and 42 are provided above and below the air conditioning duct B31 located between floors 34. Air conditioning is then blown out from the ceiling 32 on the first floor and the floor 33 on the second floor to air-condition the room or space. As a result, the air duct from the air conditioning unit 10 to the outlets 40-42 is the shortest distance and nearly straight, resulting in minimal pressure loss and heat loss along the way, and enabling a rational and efficient air conditioning and ventilation system with minimal construction effort.

[0062] Furthermore, during reheat dehumidification operation, one heat exchanger 91 functions as an evaporator through which a low-temperature, low-pressure refrigerant flows, and the other heat exchanger 92 functions as a reheater through which a medium-temperature, medium-pressure refrigerant flows. As a result, the discharged air is at a temperature above that of the intake air and has low absolute humidity, and is blown out from the outlet 97. Consequently, the reheat dehumidification thermostat in the air conditioning unit 20 remains ON for a long time, and the compressor operates continuously. This causes the surface temperature of the evaporator, the so-called evaporation temperature, to fall below the dew point temperature of the intake air, causing moisture from the intake air to condense on the evaporator. With prolonged operation, the amount of dehumidification removed increases, the absolute humidity of the discharged air decreases continuously over a long period, and the absolute humidity of the conditioned air also decreases. This also lowers the relative humidity in the air conditioning ducts, rooms, and spaces through which the conditioned air flows, making condensation less likely in the air conditioning ducts A30 and B31, especially during periods of medium temperature and high humidity such as the rainy season. Furthermore, by installing a HEPA filter type or electrostatic precipitator type air purifier 90 in the circulation path or air conditioning unit 10, even mold spore-level particles contained in the conditioned air are removed. This makes it more difficult for mold to grow in the air conditioning air passages A30 and B31 through which the conditioned air passes, and prevents mold, bacteria, and unpleasant odors from entering the building 2, thus creating a healthy and comfortable space.

[0063] Furthermore, the system automatically adjusts the average temperature of the room or space to the set temperature, making it highly convenient. The average temperature of the air inside the air conditioning ducts A30 and B31 is set to within 5K during cooling and within 10K during heating, relative to the average temperature of the surrounding air. This allows the room or space to be kept at the user's set temperature while suppressing condensation inside and outside the air conditioning ducts, ensuring that mold and other microorganisms are less likely to grow even in the event of external disturbances or changes in the air conditioning load. Furthermore, the system automatically adjusts the average temperature of the room or space to the set temperature, making it highly convenient. The average temperature of the air inside the air conditioning ducts A30 and B31 is set to within 5K during cooling and within 10K during heating, relative to the average temperature of the surrounding air. This allows the room or space to be kept at the user's set temperature while suppressing condensation inside and outside the air conditioning ducts A30 and B31. Even with external disturbances or changes in the air conditioning load, mold growth is reliably prevented.

[0064] (Embodiment 2) Figure 6 is a longitudinal cross-sectional view of the air conditioning duct B31 between floors 34. The air conditioning duct B31 is surrounded by decorative panels 183 corresponding to the ceiling 32 on the first floor and structural plywood 182 corresponding to the floor 33 on the second floor, and is covered above and below by rooms or spaces that are air-conditioned, and is covered on the front, back and sides by exterior walls etc. with insulating material 4, and is airtightly treated by applying airtight sheets mainly to the contact surfaces, making it a space with high airtightness and insulation. An internal covering material 186, such as polypropylene film, flexible polyvinyl chloride film, or PET film, is provided on the entire inner surface of the outer surface of the air passage A184 through which the conditioned air flows inside the air conditioning air passage B31, including decorative panels 183 and structural plywood 182. This material is non-permeable, non-moisture-permeable, and has a low surface roughness (surface irregularities). The height of the air conditioning duct B31 is a maximum of 340 mm, and the minimum height is 70 mm, which is the height of duct B185 sandwiched between beam 180 and ceiling joist 181. Floor area: 90m² 2 In a two-story house, the airflow volume of the ventilation unit is 1100 m³. 3 At a depth of 5m in the air conditioning duct B31, the air velocity in the air conditioning duct B31 will be 0.2 to 0.9 m / s. This is to prevent condensation and performance degradation by limiting the maximum airflow velocity of the air conditioning duct B31 to 1 m / s or less, thereby suppressing the reduction in airflow volume due to pressure loss of the conditioned air flowing through the duct B31. Furthermore, since the air passage A184 has an internal covering material 186 such as polypropylene film, flexible polyvinyl chloride film, or PET film on the surface through which the conditioned air flows, dust, moisture, and mold spores flowing through the air passage A184 cannot enter from the inner surface of decorative panels 183, structural plywood 182, etc., which are breathable and moisture-permeable and have large surface irregularities, making it difficult for mold to grow there. Moreover, dust and other particles do not easily accumulate on the surface, and it does not contain moisture, so mold does not easily grow there. As a result, dust, mold, bacteria, and unpleasant odors from the air conditioning air passage B31 do not easily enter the building 2, creating a healthy and comfortable space. [Industrial applicability]

[0065] This system maintains cleanliness within the air conditioning ducts even during long-term operation, enabling highly efficient air conditioning and ventilation throughout the entire building, thus maintaining a healthy and comfortable environment. It can be applied to air conditioning and ventilation in buildings that use air conditioning ducts or other ducts to transport conditioned and ventilated air, including not only residential buildings but also hotels, offices, commercial facilities, hospitals, factories, and research facilities. [Explanation of Symbols]

[0066] 1. Air conditioning and ventilation system 2 buildings 3 Ceiling 4. Insulation 5 beds 6. Insulation 7. Insulated sashes 8. Roof 9. Attic space 10 Air conditioning units 11 Basics 12 Underfloor space 13 Entrance 14 stairs 15. 2nd Floor Hall 16 Under the stairs 17. Air blower 18 Air conditioner outdoor unit 19 Electrical Wiring 20 Air Conditioning Department 21 Intermediate plate 22 Air outlet Room 23 A Room 24 B 30 Air conditioning ventilation duct A 31 Air conditioning ventilation duct B 32 Ceiling 33 beds Between the 34th floor 35 Connection part 36. Discharge duct 37 Bulkhead 40 Air outlet 41 Air outlet 42 Air outlet 45 Blower fan 46. ​​Blower fan 47. Sound-dampening duct 48. Sound-dampening duct 50 Exhaust vents 51 Exhaust vent 55. Return air port (suction part) 60 Heat exchange ventilation unit 61 Toilet 62 Ventilation exhaust vents 63 Heat exchanger element 64-element pre-filter 65 Exhaust duct A 66 Outdoor exhaust hood A 67 Outdoor air intake hood 68 Air supply duct A 69. Outdoor air purification filter 70 Filter Box 71 Ventilation air intake 72 Air supply duct B 75 Galari 76 Galari 80 bathroom 81 Ceiling-mounted ventilation fan 82 Exhaust duct C 83 Outdoor exhaust hood C 85. Return air vent filter (filter section A) 86. Air conditioning filter (filter section B) 87. Air blower filter (filter section C) 90 Air purifier 91 Heat exchanger 92 Heat exchanger 93 Drain pan 94 Louvers 95 Mixing section 96 Inlet 97 Air outlet 98 Inlet 100 blowers 110 Air Conditioning Unit Controller 111 Temperature sensor 112 Humidity Sensor 113 Dust sensor 114 Control Unit 120 Room Temperature Controller 121 Temperature sensor 122 Humidity Sensor 123 Dust Sensor 124 Control Unit 125 Temperature setting section 130 Control Unit 131 Blower control unit 132 Louver control unit 133 Intake temperature sensor 135 Control Unit 136 Compressor Control Unit 137 Outdoor fan control unit 140 Control Unit 141 Motor Control Unit 150 signal line 151 signal line 152 signal line 153 Signal Line 154 signal line 155 signal line 160 Control Unit 161 Electrostatic dust collector control unit 165 Control Unit 166 Motor Control Unit 180 Beam 181 veranda 182 Structural plywood 183 Decorative panel 184 Wind path A 185 Wind path B 186 Internal coating material

Claims

1. By installing air vents in rooms within a highly airtight and well-insulated building, The air conditioning unit installed in the building and the air outlet are connected by an air conditioning duct. The aforementioned air conditioning duct consists of an airtight wooden enclosure located inside or in contact with at least one of the following spaces within the building: between floors, under the floor, or in the attic. The aforementioned air conditioning duct is insulated by having at least one of the following between it and the building envelope: the room, the space, or the insulation material. The aforementioned air conditioning unit produces conditioned air, The conditioned air flows from the air conditioning unit to the outlet. The air passage that returns from the room where the air outlet is provided to the air conditioning unit is defined as the circulation path. The air conditioning unit is provided with an intake section, an air conditioning section, a bypass section, a mixing section, and a blower section. The air blower causes the air drawn in from the intake to pass through the air conditioning unit and the bypass unit, respectively. The air that has passed through the air conditioning unit and the air that has passed through the bypass unit are mixed in the mixing unit to produce the conditioned air. The airflow from the aforementioned blower is not always zero while the air conditioning unit is in operation. The amount of air blown out by the aforementioned air conditioning unit is greater than the amount of airflow from the air conditioning unit. The aforementioned blower unit directs the air towards the outlet, The conditioned air, having a temperature difference smaller than the temperature difference between the air that has passed through the air conditioning unit and the air surrounding the air conditioning duct, An air conditioning and ventilation system characterized by providing air to the air conditioning air supply passage, thereby providing air conditioning to the room through the circulation passage.

2. The air conditioning unit consists of an air conditioning fan and a heat exchanger, It is connected to the outdoor unit, which consists of an outdoor fan and a compressor. The aforementioned air blower consists of a sirocco fan and a DC motor. The air conditioning ventilation system according to claim 1, characterized in that the conditioned air is within 5K during cooling and within 10K during heating, relative to the temperature of the air surrounding the air conditioning duct.

3. An outdoor air introduction path is provided for introducing outdoor air from outside into the circulation path or the air conditioning unit, An intake fan is provided in the aforementioned outdoor air intake path to introduce the aforementioned outdoor air. An indoor air exhaust passage is provided to discharge the air inside the building to the outside from at least one of the circulation passage, the room, and the space. The air conditioning and ventilation system according to claim 1, characterized in that an exhaust fan is provided in the indoor air exhaust passage to discharge the air inside the building to the outside.

4. The air conditioning and ventilation system according to claim 1, characterized in that the air conditioning unit has a reheat dehumidification function.

5. The air conditioning and ventilation system according to claim 1, characterized in that a HEPA filter type or electrostatic precipitator type air purifier is provided in the circulation path or the air conditioning unit.

6. The air conditioning and ventilation system according to claim 1, characterized in that a blower fan is provided at the air outlet.

7. One end of the duct is connected to the outlet A of the air blower, The air conditioning and ventilation system according to claim 1, characterized in that the other end of the duct is connected to the air conditioning air supply passage.

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