Radiation air conditioning system and control method thereof

Abstract

To provide a radiation air conditioning system for home use which reduces initial cost and is economical from the viewpoint of total cost including long-term running cost and maintenance cost.SOLUTION: An indoor unit of an air conditioner is disposed in one radiant heat source space including a wall surface of a ceiling or a floor, a plurality of booster circulation fans are installed in the radiant heat source space, and the air conditioner has a function of sending air in the radiant heat source space from the radiant heat source space to each room, A first thermographic camera configured to detect a surface average temperature of a primary radiation wall surface constituted by one outer surface of the radiation heat source space, wherein a desired value of the surface average temperature of the primary radiation wall surface is set in advance as a target temperature for each of the heating operation and the cooling operation, and the controller controls the operation of the indoor unit of the air conditioner so that the surface average temperature of the primary radiation wall surface approaches the target temperature, and controls the booster circulation fan so that the air in the radiation heat source space is distributed to each room.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a radiant air conditioning system and a control method thereof, and in particular to a radiant air conditioning system for a building that uses a refrigeration cycle type air conditioner as a cold and hot heat source and a control method thereof. [Background technology]

[0002] Conventional radiant air conditioning systems typically produce cold water for cooling and hot water for heating in an outdoor unit (heat source unit), and then circulate this water through indoor radiant panels to maintain a stable thermal environment throughout the indoor space.

[0003] Patent Document 1 discloses an invention of a control device and air conditioning system for performing radiant air conditioning using radiant panels. This air conditioning system includes radiant panels installed on the ceiling side of the interior of a building, a heat source machine as a heat source device, and a control device for controlling the heat source machine. A temperature sensor for detecting the temperature (room temperature) of the room is connected to the heat source machine. During air conditioning hours, the heat source machine is configured to feedback control the temperature of the heat medium supplied to the heat transfer tube via a supply line so that the room temperature detected by the temperature sensor is maintained near a temperature (set temperature) set by the control device.

[0004] Patent Document 2 discloses a radiant air-conditioning system based on a predicted mean vote (PMV). This PMV is evaluated based on six factors: four environmental factors (room temperature, relative humidity, average wind speed, and average radiant temperature) that affect the thermal comfort of the human body, plus two human factors (amount of clothing worn and workload). The radiant air-conditioning system of Patent Document 2 includes a tubular member positioned with a space between it and the ceiling surface. The tubular member has multiple flow paths through which a heat transfer medium flows, layered in a direction away from the ceiling surface, and a fabric radiant member positioned on the opposite side of the tubular member from the ceiling surface, so as to be exposed as a radiant surface. The invention of Patent Document 2 thoroughly acquires the measured temperature of the room to be air-conditioned, as well as the surface temperatures of all areas in the room, and calculates estimated PMV values ​​for each virtual section. The difference between the target setpoint based on the PMV and the current estimated value is converged and cascade-controlled to set a corrected temperature setpoint for each virtual section, thereby achieving a comfortable PMV that is consistent with the location in the living space. That is, the air-conditioned space is divided into multiple VAV zones (virtual zones), and one or more air outlets are installed in the ceiling of each VAV zone. A temperature sensor that measures the (air) temperature within the virtual zone and a thermographic camera that measures the surface temperature within the virtual zone are installed in the ceiling of each VAV zone. The VAV controller sends an air volume adjustment signal, which is the required air volume ratio, to the integrated controller according to the deviation between the temperature sensor measurement value and the set value, and the integrated controller commands the AHU controller to achieve the required supply air volume for all VAV zones.

[0005] Patent Document 3 discloses an invention for an air conditioner that enables three modes of operation: a warm air heating mode in which refrigerant is circulated through a heat exchanger without flowing through a radiant panel to perform warm air heating; a radiant heating mode in which refrigerant is circulated through a heat exchanger to perform warm air heating and through a radiant panel to perform radiant heating; and a gentle radiant breeze heating mode in which the volume of air generated by the fan is reduced compared to the radiant heating mode and warm air heating mode. This air conditioner is equipped with an indoor temperature sensor that detects the temperature in the room where the indoor unit is installed, and a switching device that switches between the radiant heating mode and the gentle radiant breeze heating mode based on the indoor temperature detected by the indoor temperature sensor. During automatic air volume operation in the warm air heating mode, the indoor fan control unit selects one of five fan taps based on the indoor temperature detected by the indoor temperature sensor and the indoor set temperature, and controls the indoor fan to the rotation speed corresponding to the fan tap. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2016-3822 A [Patent Document 2] Patent No. 7372201 [Patent Document 3] Japanese Patent Publication No. 2023-91401 Summary of the Invention [Problem to be solved by the invention]

[0007] In the invention of Patent Document 1, the radiant panel comprises a panel body, a heat transfer holding member, and a heat transfer pipe through which a heat medium (for example, water) flows. This radiant panel is not a general-purpose product, and its manufacturing requires advanced technology, which is a factor in high costs.

[0008] According to the invention of Patent Document 2, the difference between the target set value based on PMV and the current estimated value is subjected to convergence calculation and cascade control as a corrected set temperature value for each virtual section, thereby obtaining a comfortable PMV that is not biased depending on the position in the living space. Since the temperature in the room to be air-conditioned is controlled by high-level PMV control based on theory for each of multiple VAV sections, complex control is required.

[0009] Furthermore, the invention of Patent Document 3 combines a refrigeration cycle type air conditioner with a radiant panel, which is thought to have a complex structure and be costly.

[0010] Furthermore, the inventions described in Patent Documents 1 to 3 all perform control based on the indoor temperature detected by a temperature sensor. However, controlling the indoor temperature requires air flow within the room. In particular, refrigeration cycle air conditioners use air flow to cool or heat a space using the principle of convection. As a result, one drawback is cited as "physical stress from hot and cold air." In contrast, radiant air conditioning systems use the principle of radiation, making it possible to cool or heat a space without a heat-transfer medium such as wind, and are said to have the advantage of eliminating "physical stress from hot and cold air."

[0011] On the other hand, the advantage of refrigeration cycle air conditioners is that they are positioned as general-purpose electrical appliances, and even large-capacity home and commercial air conditioners are relatively low cost, and they are compact and easy to install in homes.On the other hand, radiant air conditioners are positioned as auxiliary facilities for buildings, and require a thermal environment design by an expert before installation, and also have a high initial cost. However, when looking at total costs, including long-term running and maintenance costs, there may be situations where radiant air conditioning units are more economical.

[0012] One object of the present invention is to provide a radiant air-conditioning system and a control method thereof that reduces initial costs and is economical in terms of total costs, including long-term running costs and maintenance costs.

[0013] Another object of the present invention is to provide a radiant air conditioning device that combines a radiant air conditioning system with a refrigeration cycle air conditioner, thereby relieving people from the "physical stress caused by hot and cold air," is low-cost, can be easily used by many people, and reduces the risk of heat stroke in an environment where global warming is progressing. [Means for solving the problem]

[0014] According to one aspect of the present invention, there is provided a radiant air conditioning system for heating and cooling a building using radiant heat, comprising: a refrigeration cycle type air conditioner having an indoor unit, an outdoor unit, and a controller; A plurality of booster circulation fans; Multiple thermal cameras and a setting means for setting in advance an operation pattern relating to the heating operation and the cooling operation of the refrigeration cycle type air conditioner in the controller, the controller has a function of controlling the output of the refrigeration cycle type air conditioner and the rotation speed of the booster circulation fan, The indoor unit of the air conditioner is arranged in or near a single radiant heat source space that includes any one of a ceiling, a floor, or a side wall that constitutes a plurality of rooms in a building and is common to the plurality of rooms, The plurality of booster circulation fans are installed in the radiant heat source space functioning as one duct and have a function of sending air in the radiant heat source space from the radiant heat source space to each of the rooms, the plurality of thermal cameras include a plurality of first thermal cameras for detecting an average surface temperature of a primary radiation wall surface formed by one outer surface of the radiant heat source space; The controller is configured to preset the desired average surface temperature of the primary radiation wall surface as a target temperature for each of the heating operation and the cooling operation, and controls the operation of the indoor unit of the air conditioner so that the average surface temperature of the primary radiation wall surface detected by the first thermal camera approaches the target temperature, and also controls the booster circulation fan so that air is distributed to each room without static pressure using the blowing force of the indoor unit fan and the pulling force of the booster circulation fan.

[0015] According to the present invention, by adopting a general-purpose air conditioner as the heat source for the ceiling space equivalent to the radiant panel, it is possible to provide a radiant air conditioning system and its control method that reduces initial costs and is economical in terms of total costs, including long-term running costs and maintenance costs. Furthermore, the present invention can provide a radiant air conditioning system that is low-cost and relieves people from the physical stress caused by hot and cold air. While the use of air conditioners is increasingly recommended due to the effects of global warming, many people hesitate to use them due to the stress caused by cold air and the high running costs. The present invention can improve this situation and reduce the risk of heatstroke.

[0016] The human body is a heat-generating body, and according to the inventor's experiments, in order to sufficiently heat up a lightly clothed person in summer, an appropriate thermal environment is an ambient temperature (average surface temperature of the indoor walls) of 25°C to 28°C when air-conditioned. Airflow is also effective in removing the heat of vaporization from sweat, and according to the inventor's experiments, a gentle breeze of about 0.4 m / s to 0.8 m / s is effective. The human body also needs to dissipate heat when heated, and in order to sufficiently dissipate heat in winter when thickly clothed, an appropriate ambient temperature in the room is 21°C to 23°C.

[0017] On the other hand, with regard to radiant heating and cooling, the following equation for "approximate perceived temperature" is known as an alternative to the PMV value for measuring the indoor thermal environment. Approximate perceived temperature = (air temperature + surface temperature of surrounding walls and ceiling) / 2 According to this equation, in order to maximize the effectiveness of radiant heating and cooling, it is desirable to maintain the room temperature and the temperatures of the walls surrounding the room at the appropriate thermal environment during both cooling and heating. Experiments conducted by the inventors have confirmed that when the target temperature for the average surface temperature of the primary radiant wall is set to a predetermined value and the air conditioner is operated on full power, the primary radiant wall reaches a temperature close to the target temperature within 30 minutes to an hour, and the temperatures of each secondary radiant wall in the room also fall within 1°C to 2°C of the target temperature. Meanwhile, measurements of the "room temperature" in the height direction from the floor using a temporarily installed thermometer have also confirmed that the temperature falls within 1°C to 2°C of the target temperature. For this reason, by obtaining the relationship between the average surface temperature of the primary radiation wall and the surface temperature of the secondary radiation wall as the building characteristics in advance, and controlling the radiant heat by setting the average surface temperature of the primary radiation wall to an appropriate value as the target temperature so that the temperature of the secondary radiation wall becomes the above-mentioned appropriate thermal environment, it is possible to indirectly control the surface temperature of the secondary radiation wall and ultimately the temperature inside the room without directly measuring the temperature inside the room, and to make the temperature inside the room suitable for the thermal environment of people.

[0018] According to another aspect of the present invention, the air conditioner includes a plurality of second thermal cameras for detecting the surface temperature of at least one secondary radiation wall surface that receives radiant heat from the primary radiation wall surface in each room, and the controller is characterized in that it individually controls the output of the refrigeration cycle type air conditioner and the rotation speed of the plurality of booster circulation fans based on the average surface temperature of the primary radiation wall surface and the surface temperature of the secondary radiation wall surface.

[0019] The second thermal camera can also be used as supplementary control data to quickly detect weather changes, such as sunlight streaming through window glass, and reflect this in temperature control of the primary radiation wall, etc. Alternatively, it can be used as data to control a booster circulation fan to control the airflow to the local correction wall in a room with window glass, etc. This allows for a quick response to local temperature changes in the room that cannot be addressed by controlling the average surface temperature of the primary radiation wall alone. [Brief explanation of the drawings]

[0020] [Figure 1] 1 is a vertical cross-sectional view showing an outline of a two-story house equipped with a radiant air-conditioning system according to a first embodiment of the present invention. [Figure 2A] FIG. 2 is a plan view showing the layout of the rooms and furniture on the first floor of the house in FIG. 1. [Figure 2B] FIG. 2 is a plan view showing the layout of the rooms on the second floor of the house in FIG. 1. [Figure 3A] FIG. 2 is a plan view of the first floor side of the radiant heat source space installed in the attic on the first floor of the house in FIG. 1. [Figure 3B] FIG. 3B is a plan view of the second floor side of the radiant heat source space of FIG. 3A. [Figure 4A] FIG. 2 is a vertical cross-sectional view showing the air flow between the radiant heat source space and the first and second floors of the house in FIG. 1 during cooling. [Figure 4B] FIG. 2 is a vertical cross-sectional view showing the air flow between the radiant heat source space and the first and second floors of the house in FIG. 1 during heating. [Figure 5A] FIG. 2 is a diagram showing the operating area (front) of a thermal camera used in an embodiment of the present invention. [Figure 5B] FIG. 2 is a diagram showing the operating areas (left and right) of a thermal camera used in an embodiment of the present invention. [Figure 5C] FIG. 10 shows an example of the operating area of ​​a thermal camera on a secondary radiation wall surface including a window on a side wall. [Figure 5D] FIG. 5D is a block diagram showing an example of how each area of ​​the secondary radiation wall surface is viewed by the thermal camera of FIG. 5C. [Figure 6]FIG. 1 is a diagram showing the relationship between the configuration of a refrigeration cycle type air conditioner, a booster circulation fan, and a controller used in an embodiment of the present invention. [Figure 7] 7 is an example of a functional block of the controller of FIG. 6. [Figure 8] 8 is a flowchart showing an example of a process performed by the controller of FIG. 7 during cooling. [Figure 9] 8 is a flowchart showing an example of a process performed by the controller of FIG. 7 during heating. [Figure 10] FIG. 2 is a diagram showing an example of an annual operation pattern of an air conditioner in an embodiment of the present invention. [Figure 11] FIG. 4 is a diagram illustrating an example of an operation pattern of each device during cooling in the first embodiment. [Figure 12] FIG. 4 is a diagram illustrating an example of an operation pattern of each device during heating in the first embodiment. [Figure 13] FIG. 1 is a vertical cross-sectional view showing an outline of a two-story house equipped with a radiant air-conditioning system according to a second embodiment of the present invention. [Figure 14] FIG. 10 is a vertical cross-sectional view showing an overview of an office building equipped with a radiant air-conditioning system according to a third embodiment of the present invention. [Figure 15] FIG. 10 is a vertical cross-sectional view showing an overview of a single-story house equipped with a radiant air-conditioning system according to a fourth embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0021] Hereinafter, an embodiment of a radiant air-conditioning system of the present invention will be described with reference to the drawings. First, a first embodiment of the radiant air-conditioning system of the present invention will be described. Fig. 1 is a vertical cross-sectional view showing an outline of a two-story house equipped with a radiant air-conditioning system according to the first embodiment. The two-story house 1 has a first-floor room 10, a second-floor room 20, and a single flat radiant heat source space 30 formed between the ceiling 32 of the first-floor room and the floor 38 of the second-floor room. The rooms on each floor are connected to each other as a whole via the undercuts at the bottom of the doors. All rooms face the single radiant heat source space 30. It goes without saying that the materials used for the ceiling, floor, walls, etc. of the two-story house 1 fully satisfy the requirements of building standards in terms of insulation properties, etc. An indoor unit 41 of a refrigeration cycle air conditioner (air conditioner) 40 (see FIG. 6) is placed in the center of one radiant heat source space 30, and an outdoor unit 42 of the air conditioner is installed on the ground, and these are connected by piping (refrigerant circuit) 43 through which a refrigerant flows. The lower outer surface of the radiant heat source space 30, in other words the ceiling surface of the first-floor room 10, functions as the primary radiation wall surface 32 for the first-floor room 10. In addition, the floor surface of the first-floor room 10 functions as the secondary radiation wall surface 34 that receives radiant heat from the primary radiation wall surface 32. The height from the floor surface to the ceiling surface is, for example, about 2.4 m. Furthermore, multiple booster circulation fans 72 are installed near both ends of the radiant heat source space 30, which send the air within the radiant heat source space 30 out of the opening 70 as an air flow 76. Air from the first-floor room 10 and the second-floor room 2 is drawn into the indoor unit 41 as an intake air flow 75.

[0022] Additionally, a plurality of first thermo camera groups 50-1 and 50-2 are installed on the sidewall 36 of the first-floor room 10 to detect the surface temperature of each small block of the primary radiation wall surface 32 and the overall average temperature. Furthermore, a plurality of second thermo camera groups 51, 52, and 53 are installed on the ceiling surfaces of the first-floor room 10 and the second-floor room 20 to detect the surface temperature of each small block of the secondary radiation wall surface 34 and the overall average temperature. These thermo cameras are thermal image sensors such as infrared temperature sensors, and each has, for example, 4,800 pixels. Their measurement angle ranges are indicated by 50-1A, 50-2A, 51A, etc. Furthermore, a controller 60 for controlling the air conditioner is fixed to the ceiling surface, for example, integrally with the second thermo camera 51. The controller 60 is realized, for example, as a dedicated FPGA (Field Programmable Gate Array), an ASIC (Application Specific Integrated Circuit), or an IC circuit chip using a general-purpose single-chip microcomputer, and is formed on a printed circuit board. Each function of the controller 60 is realized by a program written in the FPGA or ASIC's digital signal processing unit, SSC interface, incremental interface, etc. The controller also includes non-volatile memories such as ROM, RAM, and EEPROM, which are interconnected via a bus.

[0023] A typical home has multiple rooms on the first floor. Therefore, the ceiling surface, i.e., the primary radiation wall surface 32, is divided into rooms, and a first thermal camera 50-1 or 50-2 is installed in each room. Furthermore, since each room is separated from the others by a wall, as shown in FIG. 2A, the total area of ​​the ceiling surface visible from each room is slightly smaller than the area of ​​the underside of the ceiling on the corresponding radiant heat source space 30 side. In the present invention, the surface temperature of the primary radiation wall surface 32 to be controlled is not the temperature of the ceiling surface for each room, but the temperature of the ceiling surface corresponding to the entire radiant heat source space 30. Therefore, the average surface temperature of the primary radiation wall surface 32 for control is calculated based on data such as the surface temperature and area of ​​the ceiling surface of each room detected by multiple first thermal cameras.

[0024] The surface temperature of the secondary radiation wall 34 in each room detected by the second thermal camera is used as complementary control data to detect the surface temperature of the ceiling surface, which is difficult to detect with the first thermal camera due to the presence of lighting fixtures and other objects, and to reflect this in temperature control of the primary radiation wall, etc. The second thermal camera is also used as complementary control data to quickly detect weather changes, such as when sunlight enters through window glass, and to reflect this in temperature control of the primary radiation wall, etc. In other words, it is used as data for controlling a booster circulation fan to control airflow to local correction walls in rooms with window glass, etc. Alternatively, it is used to detect the temperature of a portion of the primary radiation wall, which is difficult to detect with the first thermal camera, and to complement the average surface temperature of the primary radiation wall.

[0025] The volume V0 of the radiant heat source space 30 is approximately 1 / 14 to 1 / 18, for example 1 / 16, of the sum (V1+V2) of the total volume V1 of the room 10 on the floor below this radiant heat source space and the total volume V2 of the room 20 on the floor above. That is, in the present invention, the air in the radiant heat source space 30, which has a volume 1 / 16 of the total volume of the room 10 on the first floor and the room 20 on the second floor, is heated or cooled by the indoor unit 41 of the air conditioner, thereby radiating air-conditioning the entire room 10 on the first floor and the room 20 on the second floor.

[0026] Next, FIG. 2A is a plan view showing the layout and furniture of room 10 on the first floor of the house in FIG. 1. The first floor of this house has entrance 11 as an entrance / exit, hall 12, kitchen 13, washroom 14, bathroom 15, living / dining room 16, staircase 17, side wall 18 that functions as an exterior wall, and side wall 19 that separates the rooms inside. In living / dining room 16, there is furniture 90 and a person 92 is present. A window 80 is provided on the exterior wall. In this invention, the side wall 18 of the room with window 80 is defined as a local correction wall 36. Furthermore, if a building has a wall with a door that is frequently opened and closed to allow people to enter and exit from outside, this wall may also be considered a local correction wall. A plurality of first thermal cameras 50-1 to 50-5 are installed on each side wall 36 of the room 10 on the first floor to partially detect the surface temperature of the primary radiation wall surface 32, and the data from these multiple thermal cameras 50-1 to 50-5 is used individually or combined as a whole to be used as the average surface temperature of the primary radiation wall surface 32 of the entire ceiling surface on the first floor. Although this thermal camera detects the heat generated by the human body, it does so as part of the surface temperature of the radiant wall surface 32, and does not directly detect whether or not there is a person in the room to control the air conditioner.

[0027] Next, Figure 2B is a plan view showing the layout and furniture of room 20 on the second floor. The second floor has first to fourth rooms 21 to 24, a staircase 25, a side wall 28 that functions as an exterior wall, and a side wall 29 that separates the rooms inside. The first and second floors are connected by a hall 12 and a staircase 17.

[0028] 3A is a plan view of a single radiant heat source space 30 installed above the ceiling on the first floor, viewed from the first floor side. This radiant heat source space 30 is approximately 30 cm high (approximately 280 mm to 450 mm depending on the building) and is configured as a single room located opposite all of the rooms 11 to 16 on the first floor and all of the rooms 21 to 24 on the second floor. The radiant heat source space 30 also has a hall opening 300 that communicates with the hall 12. A fan of the indoor unit 41 of the air conditioner 40 draws in air flowing out from the rooms on the first and second floors through the hall opening 300 as airflow 75, and blows air cooled or heated by the indoor unit 41 into the radiant heat source space 30 as airflow 74. Multiple booster circulation fans 72 housed in fan openings 70 are installed around the periphery of the radiant heat source space 30, dispersing the airflow 74 throughout the radiant heat source space 30 and then sending it to each room on the first floor. The booster circulation fans 72 are, for example, axially short sirocco fans held inside a flat, rectangular box, and are installed within the flat fan openings 70. The fan openings 70 are, for example, rectangular, measuring 250 mm wide and 49 mm high. By locating the booster circulation fans 72 on the periphery far from the indoor unit 41, heat is circulated throughout the ceiling and floor. The booster circulation fans 72 are also used to blow air onto the perimeter zone, such as surrounding glass walls, to correct the wall temperature. In other words, each booster circulation fan 72 is not always operated under the same conditions as a whole, but is individually operated in one of strong wind, medium wind, weak wind, or gentle wind modes depending on the temperature of the primary radiation wall surface and the secondary radiation wall surface. In addition, a separate ventilation fan dedicated to the kitchen is installed on the ceiling of the kitchen 13 (not shown), and when cooking is being done in the kitchen, this dedicated ventilation fan exhausts the air to the outside of the building without passing through the radiant heat source space 30.

[0029] Next, Figure 3B is a plan view looking at the second floor side of the radiant heat source space 30. The fan of the indoor unit 41 of the air conditioner 40 sends air cooled or heated by the indoor unit 41 as airflow 74 to the room on the second floor. Note that one fan opening 70A, where no booster circulation fan 72 is installed, is provided on each of the first and second floors. This has the function of allowing the air blown by the fan of the indoor unit 41 of the air conditioner 40 to escape even if the booster circulation fan 72 stops working for some reason.

[0030] FIG. 4A is a vertical cross-sectional view showing the air flow between the radiant heat source space and the first and second floors of the house in FIG. 1 during cooling. Within the radiant heat source space 30, airflow 74 within this radiant heat source space is distributed to each room 10, 20 without static pressure due to the blowing force of the fan in the indoor unit 41 and the pulling force of the booster circulation fan 72. Static pressure is the resistance that obstructs air flow, and is defined as "the force that air exerts on the surface (wall) of a duct" when air is introduced into a duct. In the present invention, the radiant heat source space 30 functions as a single duct for all of the booster circulation fans 72, and the total cross-sectional area of ​​the fan openings 70 is set to a size that does not create resistance to the airflow within the radiant heat source space 30, even when the booster circulation fans 72 are operating at maximum airflow. As a result, the cold air in the radiant heat source space is distributed as cold air currents 77 to the bottom of each room 10, 20 without static pressure. The flow of cold air currents 77 through the radiant heat source space cools the primary radiation wall surface 32, which in turn cools the secondary radiation wall surface 34 and the second-floor floor. As a result, the surface temperature of the primary radiation wall surface 32 gradually drops, and the surface temperature of the secondary radiation wall surface 34 stabilizes within ±0.5°C of the set average surface temperature. During cooling, people in the room feel cooler as the heat from the primary radiation wall surface and secondary radiation wall surface is absorbed.

[0031] 4B is a vertical cross-sectional view showing the state of airflow 78 during heating in radiant heat source space 30, room 10 on the first floor, and room 20 on the second floor of the house in FIG. 1. Radiant heat source space 30 functions as a radiant heat source for rooms 10 and 20 on the floors above and below it. Warm air within the radiant heat source space is distributed as airflow 78 to the upper part of room 10 and the upper part of room 20 without static pressure. As a result, the surface temperature of primary radiation wall surface 32 gradually rises and stabilizes within ±0.5°C of the set average surface temperature. During heating, the primary radiation wall surface and secondary radiation wall surface act as heat sources, radiating heat directly to people in the room, making them feel warm.

[0032] Next, Figure 5A shows the operating area (front) of the thermal cameras (50-53) used in an embodiment of the present invention, which can measure over a fairly long distance L, for example, up to 20 m, and up to a range 500 of, for example, 30 degrees at an angle θ1 above and below. Figure 5B shows the operating area (left and right) of this thermal camera, which can measure up to a range 510 of, for example, 28 degrees at an angle θ2 above and below the center line 520. In other words, a single thermal camera can measure the temperature of a fairly wide wall surface. Since the layout of rooms in a home varies, the installation location of each thermal camera can be determined based on the individual circumstances of the home.

[0033] 5C is a diagram showing an example of the operating area 530 of the thermal camera 51 on the secondary radiation wall surface including a window on the side wall. That is, it shows how one thermal camera 51 simultaneously measures the surface temperature of almost the entire area (A) of the secondary radiation wall surface 34 on the floor and the main part (B) of the side wall including the area (C) of the window 80 on the local correction wall surface 36. FIG. 5D is a diagram showing an example of how each area of ​​the secondary radiation wall surface is viewed by the thermal camera of FIG. 5C, indicated by block 540. In this example, the surface temperature of the target surface, measured as data of 4,800 pixels, is divided into 24 small blocks and measured as the average temperature of the wall surface. This example also shows that sunlight is streaming in through window 80, and a portion of area (C') of secondary radiation wall surface 34 has a different temperature from the surrounding area. The temperatures of each edge surface detected in small blocks are sent directly to the controller as the surface temperature of each small block on each wall surface, and the average surface temperature of each wall surface is calculated and sent to the controller, where it is reflected in the control of the radiation temperature.

[0034] The temperature of a portion of the secondary radiation wall surface 34, i.e., the local correction wall surface 36, is affected by weather changes, the seasons, and the presence or absence of sunlight. For example, when cooling a wall surface with a window 80, temperature changes due to sunlight must be taken into consideration, as the temperature is prone to drop in winter. If snow falls, the temperature of the local correction wall surface 36 drops significantly. Furthermore, if a large number of people, who are heat-generating sources, enter and exit the room, the data on the secondary radiation wall surface 34 changes. Such changes in weather and heat-generating sources must be quickly reflected in the control of the radiation temperature to maintain the indoor temperature at an appropriate value. For example, if data on the region (C') indicates that the room temperature has risen due to sunlight during cooling operation, the temperature data on the primary radiation wall surface, which is the target of management, is corrected to increase the cooling capacity for that wall surface. Alternatively, the rotation speed of the booster circulation fan located relative to that wall surface can be increased to increase the cooling capacity through thermal conduction. Alternatively, if the temperature of the wall surface with the window 80 drops significantly during heating operation, the data for the primary radiation wall surface temperature, which is the object of management, is corrected using the data for area (C) to increase the cooling capacity of the entire room, or the data is used to control the booster circulation fan and increase the amount of warm air blown to the wall surface with the window 80.

[0035] Next, FIG. 6 is a diagram showing the relationship between the configuration of a refrigeration cycle type air conditioner, a booster circulation fan, and a controller, which are used in an embodiment of the present invention. The air conditioner 40 includes an indoor unit 41 installed indoors, an outdoor unit 42 installed outdoors, and a controller 60. The indoor unit 41 includes an indoor heat exchanger 412 and an indoor fan 414 arranged nearby. The indoor fan 414 is, for example, a sirocco fan that is long in the axial direction. The outdoor unit 42 includes a compressor 47, a four-way switching valve 44, an outdoor heat exchanger 420, an outdoor fan 422 arranged nearby, and an outdoor motor-operated valve 45. An accumulator 46 is provided in the refrigerant circuit 43 between the suction side of the compressor 47 and the four-way switching valve 44. The indoor heat exchanger 410 has thin refrigerant pipes 412 that form part of the refrigerant circuit 43, and air heated or cooled by heat exchange in the pipes 412 of this indoor heat exchanger 410 is blown out as hot or cold air by an indoor fan 414 into the radiant heat source space 30. A plurality of booster circulation fans 72 are installed in the radiant heat source space and send the air in the radiant heat source space from this radiant heat source space to each room via their respective air outlets.

[0036] The following relationship is predetermined as a condition for the air in the radiant heat source space to be distributed to each room 10, 20 without static pressure by the blowing force of the fan of the indoor unit 41 and the pulling force of the booster circulation fan 72. The area around the fan of the indoor unit 41 is open space, and the amount of air Qin(AC) drawn in by the fan of the indoor unit 41 per unit time and the amount of air Qout(AC) discharged by the fan of the indoor unit 41 are substantially equal, although there is a slight time delay. Furthermore, the total amount of air Qout(Fun1-n) discharged from the radiant heat source space 30 by the booster circulation fan 72 satisfies the condition of no static pressure and is substantially equal, although there is a slight time delay, to the amount of air Qout(AC) discharged by the fan of the indoor unit 41. In other words, the radiant heat source space functions as a duct for the booster circulation fan. In addition, since it is necessary to prevent the booster circulation fan 72 from creating negative pressure in the radiant heat source space, the controller controls the booster circulation fan 72 so that the total air volume Qout(Fun1-n) does not exceed the air volume Qout(AC) sent out by the fan of the indoor unit 41. As an example, the booster circulation fan 72 has four operating modes: strong wind, medium wind, weak wind, and gentle wind, and the airflow volume in each mode is 120 m 3 / h, 100m 3 / h, 50m 3 / h, 30m 3 / h. If all 18 booster circulation fans shown in Figures 3A and 3B were operated in the strong wind mode, the maximum airflow, i.e., the total air volume Qout(Fun1-n), would be 2160 m 3 / h. On the other hand, the airflow capacity of the indoor unit of an air conditioner has modes such as weak, medium, strong, and automatic. The maximum airflow capacity of the indoor unit, i.e., the air volume Qout(AC), can be determined according to the total volume of the rooms in the building. In the case of a large capacity, for example, a general-purpose large-capacity air conditioner for home or commercial use can have a capacity of 1500 m 3 / h~2000m 3 / h, etc. The controller controls each booster circulation fan 72 within the range of the air volume Qout(AC) according to the operating conditions of the indoor unit.

[0037] The controller 60 comprises an air conditioner control unit 61 that controls the output of the refrigeration cycle type air conditioner, a booster circulation fan control unit 62 that controls the rotation speed of the booster circulation fan, a thermo camera control unit 63 that operates the thermo camera and processes its output, a command conversion unit 64, and a remote controller 65. When a general-purpose air conditioner for home or commercial use is used as a cooling or heating source in the radiant air conditioning system of the present invention, the command conversion unit 64 has the function of converting operation commands so that the indoor and outdoor units of the general-purpose air conditioner from various manufacturers can be operated with the remote controller 65 of the radiant air conditioning system of the present invention. The controller 60 further has a function of presetting operation patterns relating to the heating operation and cooling operation of the refrigeration cycle type air conditioner. In the memory of the controller 60, desired values ​​of the average surface temperature of the primary radiation wall surface are set in advance as target temperatures for each of the heating operation and the cooling operation.

[0038] FIG. 7 is an example of a functional block diagram of the controller of FIG. In the controller 60, for example, the following data is held in the memory as the initial data 600. (1) Data based on building standards, such as the structure of each room in the building, the heat return rate and area of ​​each wall, and the relative positions of air conditioners and booster circulation fans (2) Set average surface temperature of the primary radiation wall (3) Methods for interpolating the temperature of the primary radiation wall based on the average surface temperature of the primary radiation wall, the operating conditions of the air conditioner, and the temperature of the secondary radiation wall. In addition, the conditions for cooling and heating operation are as follows: (1) User settings, desired temperature settings, annual standard operating patterns, etc. (2) The relationship between the temperature of each part of the primary and secondary radiant wall surfaces, the total air flow rate (intake and discharge) of the air conditioner, and the air flow rate of each booster circulation fan (Fun). The average surface temperature of the primary radiant wall should be set to 25 to 28°C during cooling and 21 to 23°C during heating. The processing functions of the CPU 610 include a program 612 for controlling the thermo camera, a program 614 for calculating and controlling the control output of the air conditioner based on user input and the output of the first and second thermo cameras, and a program 616 for calculating and controlling the rotation speed of each booster circulation fan (Fun) based on the output of the first and second thermo cameras. It also has a communication function 618. The air conditioner control unit 61 controls the compressor rotation speed, the opening of the expansion valve, and the position of the switching valve based on the output of the CPU, etc. Furthermore, each booster circulation fan (Fun) control unit 62 controls the rotation speed output of each fan.

[0039] Fig. 8 is a flowchart showing an example of processing during cooling by the controller of Fig. 7. First, the operation schedule, the operation pattern and operation mode of the air conditioner, and the drive conditions of the booster circulation fan are obtained (S602). Regarding control of the thermal cameras, the air conditioner control unit activates each camera (S610) and detects the surface temperature of each block on the primary radiation wall and each block on the secondary radiation wall (S611, S612). Furthermore, the unit calculates the average surface temperature of the primary radiation wall and the secondary radiation wall (S613, S614) and records the data (S615). Note that the thermal camera may also have the function of calculating the average surface temperature. The air conditioner control unit complements the data on the primary radiation wall with the data on the secondary radiation wall under preset conditions (S616) and records the complemented data in memory (S617). For example, in the operating area 510 of the thermal camera 51, data on a portion of the primary radiation wall may not be obtained, and data from other thermal cameras may be supplemented to complete the data on the entire primary radiation wall. This process is repeated until completion (S618, S619). Next, for the air conditioner's cooling operation mode (S620), the system obtains the set average surface temperature of the primary radiant wall (S621) and acquires data from the thermal camera (S622). It then determines whether the detected and supplemented average surface temperature of the primary radiant wall is within ±2°C of the set temperature (S623). If it is not within ±2°C, the system calculates the required output power of the air conditioner (cooling) and the speed of the booster circulation fan based on the difference in average surface temperature (S624, S625). For example, when cooling operation begins and the temperature difference is large, the air conditioner and booster circulation fan are naturally operated at high output and high speed (S626). It then determines whether the difference between the detected and supplemented average surface temperature of the primary radiant wall and the set temperature is within ±0.5°C (S627). If it is not within ±0.5°C of the set temperature, it returns to S624. If the difference is within ±0.5°C, the air conditioner and booster circulation fan are operated in low-power mode, for example, with the booster circulation fan set to a gentle breeze (S628). Next, it is determined whether the surface temperature of any block on the secondary radiation wall has changed by a predetermined value or more (S629). This predetermined value is set, for example, as a significant change, e.g., a change of 2°C or more, over a fairly wide area of ​​the secondary radiation wall. If a change of this predetermined value or more has occurred, it is determined whether a change in the operating conditions is necessary based on pre-given information (S630). If a change in the operating conditions is necessary, the process returns to step S624. For example, with respect to the local correction wall 36, if there is a significant local change in surface temperature due to the presence or absence of sunlight, as shown by blocks C'1 and C'2 in Figure 5D, it is determined that a change in the operating conditions is necessary. For example, when direct sunlight hits a window, even a double-glazed or double-paned window can reach temperatures of 30°C or more, and the floor exposed to the sunlight can also reach 30°C or more, causing discomfort to people inside the room. In this case, it is important to lower the temperature of the local correction wall surface 36 to, for example, 28° C. only during the time period when it is exposed to sunlight. If no change is necessary, the process returns to step S627. This process is repeated until the end (S624-S632).

[0040] Next, Fig. 9 is a flowchart showing an example of processing during heating by the controller of Fig. 7. First, the operation schedule, the operation pattern and operation mode of the air conditioner, and the drive conditions of the booster circulation fan are obtained (S702). Regarding thermal camera control, each air conditioner control unit activates the camera (S710) and detects the surface temperature of each block of the primary radiation wall and the surface temperature of each block of the secondary radiation wall (S711, S712). Furthermore, the average surface temperature of the primary radiation wall and the secondary radiation wall is calculated (S713, S714) and each data is recorded (S715). Under preset conditions, the data of the primary radiation wall is supplemented with the data of the secondary radiation wall (S716), and the supplemented data is recorded in memory (S717). For example, in winter, when the weather changes and snow begins to fall, the temperature around the window may drop below 13°C, causing discomfort to people inside the room. In such a case, it is necessary to direct warm air toward the local correction wall 36 to raise the temperature, for example, to 18°C. This process is repeated until completion (S718, S719).

[0041] Next, for the heating operation mode of the air conditioner (S720), the set average surface temperature of the primary radiant wall is obtained (S721), and various data from the thermal camera are obtained (S722). Then, a determination is made as to whether the detected and supplemented average surface temperature of the primary radiant wall is within ±2°C of the set temperature (S723). If it is not within ±2°C, the required output power of the air conditioner (heating) and the speed of the booster circulation fan are calculated based on this difference in average surface temperature (S724, S725). For example, when heating operation is starting and the temperature difference is large, the air conditioner and booster circulation fan are naturally operated at high output and high speed (S726). Furthermore, a determination is made as to whether the difference between the detected and supplemented average surface temperature of the primary radiant wall and the set temperature is within ±0.5°C (S727). If it is not within ±0.5°C of the set temperature, the process returns to S724. If the difference is within ±0.5°C, the air conditioner and booster circulation fan are operated in low-power mode, for example, with the booster circulation fan set to a gentle breeze (S728). Next, it is determined whether the surface temperature of any block on the secondary radiation wall has changed by more than a predetermined value (S729). This predetermined value is set, for example, as a significant change, for example, a change of 2°C or more, over a fairly wide area of ​​the secondary radiation wall. If a change of more than this predetermined value has occurred, it is determined based on previously provided information whether a change in the operating conditions is necessary (S730). If a change in the operating conditions is necessary, the process returns to step S724. If a change is not necessary, the process returns to step S727. This process is repeated until completion (S724-S732).

[0042] FIG. 10 is a diagram showing an example of an annual operation pattern of an air conditioner in an embodiment of the present invention. The annual operating pattern varies depending on the environment in which the air conditioner is installed, such as a home, office, or store. The specific period may be set by the user, or a recommended pattern may be preset. For example, in the case of a private residence, 24-hour cooling or heating operation may be performed during midsummer and midwinter. In early winter and early summer, operation may be performed only during designated core hours of the daytime and evening. Other seasons, such as spring and autumn, may be set by the user as needed. The user may determine the operating pattern using long-term weather data provided from an external source. Even in the case of 24-hour cooling or heating operation, if the influence of weather conditions such as sunlight or snow is significant, processing such as that shown in Figures 8 and 9 related to the local correction wall surface 36 is performed.

[0043] FIG. 11 is a diagram showing an example of the operation pattern of each device during cooling in the first embodiment. That is, this is a specific example of cooling only during core time periods in the annual operation pattern of FIG. 10. When operating only during such a predetermined core time period, pre-cooling operation is performed in advance using high-output air conditioners and booster circulation fans for the time periods when cooling is required, and the air conditioners and booster circulation fans are controlled so that sufficient cooling capacity is exerted in a short time during the time periods when cooling is required. When the difference between the average surface temperature of the primary radiant wall surface and the set temperature is within ±0.5°C, the air conditioners are operated at low output and the booster circulation fans are operated continuously in gentle breeze mode. As an example, let's assume that the core time period requiring cooling starts at 10:00 AM, and the temperatures on the floor and near the ceiling at 9:00 AM are both approximately 30°C. In this case, let's assume that cooling operation is performed in output mode (19°C, airflow 1800 m) at 9:00 AM. 3 / h), the temperature near the ceiling will reach 28.5°C after 15 minutes, and after one hour the temperature near the ceiling will reach nearly the set temperature, for example 27.5±0.5°C. From then on, during core hours when cooling is required, the air conditioner can basically operate continuously at low output and the booster circulation fan in gentle breeze mode. Of course, if there are changes in weather conditions or the number of people in the room during this time, the operating conditions of the air conditioner and booster circulation fan can be changed based on the relationship between the average surface temperature of the primary radiant wall and the set temperature, etc.

[0044] FIG. 12 shows an example of the operation pattern of each device during heating in the first embodiment. That is, this is a specific example of heating only during core time periods in the annual operation pattern of FIG. 10 . When operating only during such a predetermined core time period, preheating operation is performed in advance using a high-output air conditioner or a booster circulation fan for the time period when heating is required, and the air conditioner and booster circulation fan are controlled so that sufficient heating capacity can be exerted in a short time during the time period when heating is required. When the average surface temperature of the primary radiant wall surface falls within a set temperature, for example, 22.5±0.5°C, the air conditioner is operated at low output and the booster circulation fan is operated in gentle breeze mode. If there are changes in weather conditions or indoor occupancy during operation, the operating conditions of the air conditioner and booster circulation fan also change based on the relationship between the average surface temperature of the primary radiant wall surface and the set temperature. In addition, some general-purpose air conditioners have a dehumidifying function using a condenser, so if humidity control is required, a humidity sensor can be installed near the controller and such an air conditioner can be used.

[0045] As described above, according to the present invention, by installing one indoor unit of a general-purpose air conditioner and multiple booster circulation fans in the ceiling space, it is possible to give the ceiling space the functionality equivalent to a radiant panel. This reduces initial costs and provides a radiant air conditioning system that is economical in terms of total cost, including long-term running costs and maintenance costs.

[0046] Next, FIG. 13 is a vertical cross-sectional view showing an outline of a two-story house equipped with a radiant air-conditioning system according to a second embodiment of the present invention. The indoor unit 41 of the refrigeration cycle type air conditioner is installed in an empty space 320 on the second floor, close to the radiant heat source space 30, and air is discharged underfloor into the radiant heat source space 30. Other configurations are the same as those of the embodiment shown in FIG. 1 etc. In this case, the radiant heat source space 30 also functions as a single duct for each booster circulation fan 72. The controller 60 controls the booster circulation fans 72 so that the total air volume Qout(Fun1-n) of the booster circulation fans 72 does not exceed the air volume Qout(AC) delivered by the fan of the indoor unit 41.

[0047] Next, FIG. 14 is a vertical cross-sectional view showing an outline of an office building equipped with a radiant air-conditioning system according to a third embodiment of the present invention. The radiant heat source space 30 functions as a radiant heat source for the room 10 on the floor below. The volume V0 of the radiant heat source space 30 is 1 / 7 to 1 / 9, for example 1 / 8, of the total volume V1 of the room 10 below this radiant heat source space. That is, in the present invention, the air in the radiant heat source space 30, which has a volume 1 / 8 of the total volume of the lower room 10, is heated or cooled to radiantly air-condition the lower room. In this embodiment, the sidewall containing the window 80 is the local correction wall surface 36 and is the target of control by the booster circulation fan. Specifically, the window-side fan opening 70-2 and the window-side booster circulation fan 72-2 are installed outside the fan opening 70-1 and the booster circulation fan 72-1, i.e., closer to the window. The airflow volume of the window-side booster circulation fan 72-2 is set to be greater than that of the booster circulation fan 72-1. For example, when the booster circulation fan 72-1 is in gentle breeze mode, the airflow volume of the window-side booster circulation fan 72-2 is set to, for example, moderate breeze. In this way, by forming an air curtain 79 inside the window 80, the airflow 77 blocks heat from the window, making the room 10 less susceptible to the effects of outside air.

[0048] 15 is a vertical cross-sectional view showing an outline of a single-story house equipped with a radiant air-conditioning system according to a fourth embodiment of the present invention. In this embodiment, one radiant heat source space 30 is provided between a floor 34 of the first floor house and a foundation member 39. The foundation member 39 is configured to receive heat from the ground. An air conditioner indoor unit 41 is provided at one end of the radiant heat source space 30. According to this embodiment, geothermal heat of 17°C to 18°C ​​is used to heat the floor 34 throughout the year, thereby increasing the temperature of the radiant heat source space 30 and saving energy, especially during cold seasons. [Explanation of symbols]

[0049] 10 First floor room 20 Second floor room 30 Radiant heat source space 32 Primary radiation wall surface 34 Secondary radiation wall 41 Air conditioner indoor unit 42 Air conditioner outdoor unit 50-53 Thermal Camera 60 Controller 70 Opening 72 Booster Circulation Fan 75 Airflow 76 Airflow

Claims

1. a refrigeration cycle type air conditioner having an indoor unit, an outdoor unit, and a controller; A plurality of booster circulation fans; Multiple thermal cameras and a setting means for setting in advance an operation pattern relating to the heating operation and the cooling operation of the refrigeration cycle type air conditioner in the controller, the controller has a function of controlling the output of the refrigeration cycle type air conditioner and the rotation speed of the booster circulation fan, The indoor unit of the air conditioner is disposed in or near a single radiant heat source space that includes any one of a ceiling, a floor, or a side wall that constitutes a plurality of rooms in a building and that is common to the plurality of rooms, the plurality of booster circulation fans are installed in the radiant heat source space functioning as one duct and have a function of sending air in the radiant heat source space from the radiant heat source space to each of the rooms; the plurality of thermal cameras include a plurality of first thermal cameras for detecting an average surface temperature of a primary radiation wall surface formed by one outer surface of the radiant heat source space; The controller is configured to preset a desired value for the average surface temperature of the primary radiation wall surface as a target temperature for each of the heating operation and the cooling operation, and controls the operation of the indoor unit of the air conditioner so that the average surface temperature of the primary radiation wall surface detected by the first thermal camera approaches the target temperature, and also controls the booster circulation fan so that air is distributed to each room without static pressure using the blowing force of the indoor unit fan and the pulling force of the booster circulation fan.

2. 2. The radiant air-conditioning system according to claim 1, further comprising a plurality of second thermal cameras for detecting the surface temperature of at least one secondary radiation wall surface that receives radiant heat from the primary radiation wall surface in each of the rooms; The controller controls the output of the refrigeration cycle type air conditioner and the rotation speed of the plurality of booster circulation fans individually based on the average surface temperature of the primary radiation wall surface and the surface temperature of the secondary radiation wall surface.

3. 3. The radiant air-conditioning system according to claim 2, wherein the wall surface corresponding to the side wall on which the window or entrance of the building is provided is a local correction wall surface, and the booster circulation fan located at a position corresponding to the local correction wall surface is configured to send air within the radiant heat source space to the local correction wall surface and locally correct the temperature of the local correction wall surface by thermal conduction.

4. 2. A control method for a radiant air conditioning system according to claim 1, characterized in that the operating pattern of the refrigeration cycle type air conditioner is to perform cooling in summer and heating in winter by continuous operation for 24 hours.

5. A radiant air conditioning system that uses radiant heat to heat and cool a building, A flat radiant heat source space including any one of a ceiling, a floor, or a side wall constituting a plurality of rooms of the building and spanning the plurality of rooms; a refrigeration cycle type air conditioner having an indoor unit and an outdoor unit; A primary radiation wall surface formed by one outer surface of the radiation heat source space; In each room, at least one secondary radiation wall surface is located opposite the primary radiation wall surface and receives radiant heat from the primary radiation wall surface; a plurality of booster circulation fans installed in the radiant heat source space and configured to send air from the radiant heat source space to each of the rooms via an air outlet; a plurality of first thermal cameras for detecting an average surface temperature of the primary radiation wall surface; a plurality of second thermal cameras for detecting the surface temperature of the secondary radiation wall surface; a controller for controlling the output of the refrigeration cycle type air conditioner and the rotation speed of the booster circulation fan; a means for setting in advance operation patterns relating to heating operation and cooling operation of the refrigeration cycle type air conditioner in the controller; The indoor unit of the refrigeration cycle type air conditioner is installed in or near the radiant heat source space, a desired value of the average surface temperature of the primary radiation wall surface is set in advance as a target temperature for each of the heating operation and the cooling operation in the controller; The controller individually controls the output of the refrigeration cycle type air conditioner and the rotation speeds of the plurality of booster circulation fans based on the average surface temperature of the primary radiation wall surface and the surface temperature of the secondary radiation wall surface, A radiant air conditioning system characterized in that, within the radiant heat source space, the air within the radiant heat source space is distributed to each room without static pressure by the blowing force of the fan of the indoor unit and the pulling force of the booster circulation fan.

6. 6. A radiant air-conditioning system according to claim 5, wherein the radiant heat source space functions as a radiant heat source for each of the rooms on the floors above and below it, and the volume of the radiant heat source space is 1 / 15 to 1 / 17 of the sum of the volumes of the rooms above and below the radiant heat source space.

7. 6. A radiant air-conditioning system according to claim 5, wherein the radiant heat source space functions as a radiant heat source for each of the rooms below it, and its volume is 1 / 7 to 1 / 9 of the sum of the volumes of the rooms below the radiant heat source space.

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