JP2017146037A - Radiant heating and cooling system and radiant heating and cooling method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radiant heating and cooling system capable of performing radiant heating and cooling efficiently and improving amenity by reducing a range of variation in temperature at a living room space S1.SOLUTION: This invention relates to a radiant heating and cooling system for performing heating and cooling at a living room space S1 through a radiant from a ceiling material 2 cooled or heated by conditioned air got from an air-conditioning machine 3 installed at a ceiling space S2 that comprises living room temperature detecting means 4 for detecting a temperature in the living room space S1; suction temperature detecting means 5 for detecting a suction temperature from the ceiling space S2 to the air-conditioning machine 3; and control means 6 for controlling driving of the air-conditioning machine 3 to eliminate a difference between the living room temperature detected by the living room temperature detecting means 4 and a set value of a pre-set living room temperature and a difference between the suction temperature detected by the suction temperature detecting means 5 and a set value of a pre-set suction temperature.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a radiant cooling and heating system and a radiant cooling and heating method for cooling and heating an indoor space by heat radiation from a ceiling surface.

  Indoors where people do not like airflow or where humans are supine for long periods of time, such as hospital rooms, dialysis rooms, examination rooms, welfare rooms, and accommodation rooms, are as warm as possible. There is a need to make the humidity environment comfortable. However, since the conventional air-conditioning system that jets conditioned air into the room is the mainstream, a conspicuous air current is generated in the room, and the air current directly hits the human body to cause discomfort. Further, due to the difference in specific gravity of air depending on the temperature, the cold air moves downward and the warm air moves upward to generate a vertical temperature distribution. Therefore, in recent years, attention has been focused on a radiant cooling and heating system that makes it difficult to generate unpleasant airflow and vertical room temperature distribution by radiating heat from the ceiling surface to the indoor space.

FIG. 6 shows an example of the prior art of this type of radiant cooling and heating system. That is, the radiant cooling and heating system shown in FIG. 6 uses a ceiling material 101 having a thermal resistance per unit area of 0.01 m ² · K / W or more and 0.4 m ² · K / W or less. And a ceiling back space 104 which is appropriately insulated and sealed by a heat insulating material 102 and is supplied with cooling air or warming air from the air conditioner 103 to the ceiling back space 104, The living room space 105 is cooled and heated by the thermal radiation (see Patent Document 1 below).

JP-A-5-149586

  However, many of the air conditioners are controlled on the basis of the temperature detected by the temperature sensor provided in the suction port. Such an air conditioner is used as the air conditioner 103 of the radiant cooling and heating system shown in FIG. In this case, since the temperature detected by the temperature sensor provided in the suction port is the temperature of the intake air from the ceiling space 104, the temperature of the living room space 105 cannot be controlled. Further, when the air conditioner 103 is controlled based on temperature data from a sensor that detects the temperature of the living room space 105, the temperature of the ceiling space 104 is likely to be high during heating, and is likely to be low during cooling. Therefore, depending on the model of the air conditioner 103, there is a possibility that the temperature may be out of the usable temperature range of the indoor unit or the continuous operation possible temperature range determined by the manufacturer.

  A general convection type air conditioner turns off the drive when the temperature detected by the temperature sensor reaches the set temperature, and turns on the drive when the detected temperature is a predetermined value or more away from the set temperature. Thus, the temperature close to the set temperature is always maintained while repeating ON / OFF. For this reason, as shown in FIG. 6, when the temperature environment of the living room space 105 is controlled through the ceiling material 101 by the air conditioner 103 installed in the narrow ceiling space 104, compared to a general convection type air conditioner. There is a concern that the cycle of the ON / OFF cycle becomes longer, and the width of the change in the temperature of the human body in the living room space 105 is increased.

  The present invention has been made in view of the above points, and its technical problem is that it can efficiently perform radiant cooling and heating and can improve comfort and radiant cooling and heating system and radiant cooling and heating. It is to provide a method.

  As a means for effectively solving the technical problems described above, a radiant cooling and heating system according to the present invention is an air conditioner installed in a ceiling back space defined in a sealed manner via a ceiling material above a living room space. A radiant cooling and heating system for cooling and heating the room space by radiation from the ceiling material cooled or heated by conditioned air from the air conditioner, and a room temperature detection means for detecting the temperature of the room space; Suction temperature detection means for detecting a suction temperature from the ceiling space to the air conditioner, a difference between a room temperature detected by the room temperature detection means and a preset value of the room temperature, and the suction temperature detection Control means for controlling the driving of the air conditioner so as to eliminate the difference between the suction temperature detected by the means and a preset value of the suction temperature.

  Preferably, in the radiant cooling and heating system according to the present invention, the process by the control means is such that, during heating, the room temperature detected by the room temperature detection means is lower than the set value of the room temperature, and the suction detected by the suction temperature detection means When the temperature is lower than the set value of the suction temperature, a processing step of turning on or increasing the heating output of the air conditioner, the room temperature is equal to or higher than the set value of the room temperature, and / or the suction temperature is set to the suction temperature. When the value is equal to or greater than the value, there is a processing step of turning off or reducing the heating output of the air conditioner.

  Preferably, in the radiant cooling and heating system according to the present invention, the processing by the control means is such that, during cooling, the room temperature detected by the room temperature detecting means is higher than the set value of the room temperature, and the suction detected by the suction temperature detecting means When the temperature is higher than the set value of the suction temperature, a processing step of turning on or increasing the cooling output of the air conditioner, the room temperature is equal to or lower than the set value of the room temperature, and / or the suction temperature is set to the suction temperature. When the value is equal to or less than the value, there is a processing step of turning off or reducing the cooling output of the air conditioner.

  According to the above configuration, at the time of heating, the control device is configured such that the temperature of the room space detected by the room temperature detecting unit is lower than the set temperature of the room temperature and the suction temperature of the air conditioner detected by the suction temperature detecting unit. However, when the suction temperature setting is lower than the temperature, the air conditioner is operated for heating, whereby either the temperature of the living room space or the suction temperature of the air conditioner rises to the set temperature, and the difference from the set temperature is eliminated. In such a case, control is performed to stop the air conditioner. During cooling, the control device detects that the temperature of the room space detected by the room temperature detection means is higher than the set temperature of the room temperature, and the suction temperature of the air conditioner detected by the suction temperature detection means is equal to the suction temperature. If the air conditioner is air-cooled when the temperature is higher than the set temperature, and either the temperature of the living room or the suction temperature of the air conditioner drops to the set temperature and the difference from the set temperature is resolved, the air conditioner Control to stop.

  In the radiant cooling and heating system according to the present invention, preferably, a duct extending from an air outlet of the air conditioner is opened downward, and air conditioned air is sprayed onto the upper surface of the ceiling material.

  According to the above configuration, the conditioned air from the outlet of the air conditioner is sprayed onto the ceiling material by the duct opened downward, so that the ceiling material is cooled or heated, and as a result, radiation from the ceiling material to the living room space is generated. It is done efficiently.

  In addition, the radiant cooling and heating method according to the present invention cools or warms the ceiling material with conditioned air from an air conditioner installed in a ceiling back space defined in a sealed manner above the living room space via a ceiling material. In the radiant cooling and heating method for cooling and heating the room space by radiation from the ceiling material, the difference between the room temperature detected by the room temperature detection means and the preset value of the room temperature and the suction temperature detection means The drive of the air conditioner is controlled so as to eliminate the difference between the suction temperature from the ceiling space detected by the above to the air conditioner and a preset value of the suction temperature.

  Preferably, in the radiant cooling and heating method according to the present invention, during heating, when the room temperature is lower than the set value of the room temperature and the suction temperature is lower than the set value of the suction temperature, the heating output of the air conditioner is turned on or increased. When the room temperature is equal to or higher than the set value of the room temperature and / or the suction temperature is equal to or higher than the set value of the suction temperature, the heating output of the air conditioner is turned off or reduced.

  Preferably, in the radiant cooling and heating method according to the present invention, during cooling, when the room temperature is higher than the set value of the room temperature and the suction temperature is higher than the set value of the suction temperature, the cooling output of the air conditioner is turned ON or increased. When the room temperature is equal to or lower than the set value of the room temperature and / or the suction temperature is equal to or lower than the set value of the suction temperature, the cooling output of the air conditioner is turned off or reduced.

  According to the radiant cooling and heating system according to the present invention, the drive of the air conditioner is controlled under the and condition from the detected value of the room temperature and the detected value of the suction temperature from the ceiling space to the air conditioner. The temperature of the ceiling space does not easily become high or does not easily become low during cooling. Therefore, the range of temperature change in the living room space can be reduced, and comfort can be improved.

1 is a longitudinal sectional view schematically showing a configuration of a preferred embodiment of a radiant cooling and heating system according to the present invention. It is a flowchart which shows the operation | movement at the time of the heating operation by preferable embodiment of the radiation cooling / heating system which concerns on this invention. It is a diagram which shows the behavior of the suction temperature of the air conditioner, the ceiling material surface temperature, the body temperature, and the room temperature during the heating operation in comparison with the present invention and the conventional technology. It is a flowchart which shows the operation | movement at the time of the air_conditionaing | cooling operation by preferable embodiment of the radiation cooling / heating system which concerns on this invention. It is a diagram which compares the suction temperature of the air conditioner at the time of air_conditionaing | cooling operation, the ceiling material surface temperature, body temperature, and room temperature behavior with this invention and the prior art. It is a longitudinal cross-sectional view which shows roughly an example of the radiation heating / cooling system which concerns on a prior art.

  Hereinafter, preferred embodiments of a radiant cooling and heating system according to the present invention will be described with reference to the drawings.

  In FIG. 1, reference numeral 1 is a frame of a steel frame / reinforced concrete building, 11 is a frame slab, and 12 is a frame side wall. A ceiling material 2 is attached to the lower side of the frame slab 11 via suspension bolts or a ceiling base material (not shown) assembled in a lattice shape, and the upper and lower frame slabs 11, 11 are attached by the ceiling material 2. A living room space S1 and a sealed ceiling space S2 are defined in between. Further, the lower surface of the housing slab 11 surrounding the ceiling space S <b> 2 and the inner surface of the housing side wall 12 are covered with a heat insulating material 13.

  The ceiling material 2 is made of a porous material excellent in moisture permeability that allows passage of water vapor and moisture absorption that absorbs water vapor. For example, a material made of gypsum board is preferably used.

  Reference numeral 3 denotes an air conditioner, which transfers heat to and from an outdoor unit (not shown) by circulating a fluid with a reversible change in liquid phase to gas phase, thereby taking in the ceiling space S2. The air is cooled and ejected by a latent heat absorption action when the fluid undergoes a phase change from the liquid phase to the gas phase, or is heated and ejected by a latent heat release action when the fluid undergoes a phase change from the gas phase to the liquid phase, Thus, the ceiling space S2 is cooled or heated. Also, a plurality of ducts 31 for discharging conditioned air (cooling air or heating air) branch out from the air conditioner 3 and extend, and the outlet 31a of each duct 31 opens downward, that is, the ceiling material 2 It opens in the state facing the upper surface (back surface). Preferably, the outlet 31a of the duct 31 is opened so as to be located immediately above an area in the living room space S1, for example, where the heat load by the human body is large.

  Reference numeral 4 is a room temperature sensor for detecting the temperature of the air in the room space S1 (hereinafter referred to as the room temperature), and corresponds to the room temperature detecting means described in claim 1, for example, an air conditioner. 3 is built in a remote control device (not shown) for remotely operating the control unit 3.

  Reference numeral 5 is a suction temperature sensor that detects the temperature of air sucked into the air conditioner 3 from the ceiling space S2 (hereinafter referred to as suction temperature), and corresponds to the suction temperature detection means according to claim 1. For example, it is attached to a suction port (not shown) in the air conditioner 3.

  Reference numeral 6 is a controller that takes in the room temperature data detected by the room temperature sensor 4 and the suction temperature data detected by the suction temperature sensor 5 and controls the driving of the air conditioner 3. This corresponds to the control means described and is built in the air conditioner 3. The controller 6 includes a memory 61 that stores control programs and setting values, and an input unit 62 that can change the setting values using a remote controller (not shown). In addition, the suction set temperature of the air conditioner 3 at the time of heating can be changed, for example, at about 25 to 35 ° C., and the room set temperature can be changed at, for example, about 20 to 28 ° C. The suction set temperature of the air conditioner 3 at the time of cooling is For example, the room set temperature can be changed by, for example, about 20 to 28 ° C.

  According to the radiant cooling and heating system of the embodiment configured as described above, in the winter heating, for example, when a resident in the living room space S1 performs a heating operation of the air conditioner 3 using a remote controller (not shown), The air in the space S2 is taken into the air conditioner 3 and heated, and the heated air is blown out to the ceiling back space S2 through the duct 31, so that the inside of the ceiling back space S2 is heated. And since the lower surface of the housing slab 11 surrounding the ceiling back space S2 and the inner surface of the housing side wall 12 are covered with the heat insulating material 13, the air in the ceiling back space S2 is efficiently heated.

  Here, the heated air blown from the blowout port 31a of the duct 31 tends to rise due to buoyancy because the specific gravity is small compared to the surrounding air, but the blowout port 31a is opened downward. Therefore, it is forcibly sprayed on the upper surface of the ceiling material 2. For this reason, the convective heat transfer coefficient between the lower layer part of the ceiling back space S2 and the ceiling material 2 is higher than the convective heat transfer coefficient between the upper layer part of the ceiling back space S2 and the housing slab 11 on the upper floor side. Since it becomes large and heat exchange with the ceiling material 2 is performed efficiently, heat dissipation loss to the upper floor is suppressed, and radiant heating from the ceiling material 2 to the living room space S1 is efficiently performed. The response of the rising of the radiant heating at S1 is fast.

  FIG. 2 shows the control operation of the controller 6 during the heating operation. That is, in the heating operation, when the heating operation of the air conditioner 3 is first turned on (processing step S101), the room temperature detected by the room temperature sensor 4 is set to the room temperature set in advance via the input unit 62. It is determined whether it is lower (hereinafter referred to as room setting temperature) (processing step S102), and if it is determined that the room temperature is lower than the room setting temperature (processing step S102 = YES), then it is detected by the suction temperature sensor 5 It is determined whether the suction temperature is lower than a preset value of the suction temperature (hereinafter referred to as “suction set temperature”) set in advance via the input unit 62 (processing step S103), and if the suction temperature is lower than the suction set temperature If it is determined (processing step S103 = YES), the process returns to step S101 and the heating operation of the air conditioner 3 is continued. For this reason, the heating operation gradually reduces the difference between the suction temperature with respect to the suction set temperature and the difference between the room temperature with respect to the room setting temperature.

  On the other hand, when it is determined in the processing step S102 that the room temperature has risen to the room setting temperature (processing step S102 = NO), and when it is determined in the processing step S103 that the suction temperature has increased to the suction setting temperature (processing) In step S103 = NO), control is performed to turn off the heating operation of the air conditioner 3 (step S104).

  Then, in the next processing step S105, it is determined whether the room temperature detected by the room temperature sensor 4 is lower than the room set temperature and the suction temperature detected by the suction temperature sensor 5 is lower than the suction set temperature. When it is determined that both of the suction temperatures are lower than the respective set temperatures (processing step S105 = YES), the process returns to step S101 and the heating operation of the air conditioner 3 is restarted. When it is determined that at least one is within the set temperature range (processing step S105 = NO), the process returns to step S104 and the stopped state of the air conditioner 3 is maintained.

  FIG. 3 shows the behavior of the air-conditioner suction temperature, ceiling material surface temperature, body temperature, and room temperature during heating operation in comparison with the present invention and the prior art. That is, when the heating operation of the air conditioner installed in the ceiling space is controlled based only on the room temperature as in the prior art, the suction temperature (temperature of the ceiling space) is as shown in FIG. If an air conditioner installed in a narrow ceiling space is used to control the temperature environment of the living room space through the ceiling material, the ON / OFF cycle of the air conditioner will become longer and the room space will become longer. The range of changes in the temperature of human sensation is relatively large. On the other hand, since the system of the present invention controls the heating operation of the air conditioner 3 under the and condition from the room temperature and the suction temperature, as shown in FIG. The OFF cycle is shortened and the air conditioner 3 is not exposed to an extremely high temperature space, thus preventing it from being out of the usable temperature range or continuous operation range specified by the air conditioner manufacturer. be able to. Moreover, the range of change in the temperature of sensation can be reduced and comfort can be improved.

  Next, in cooling in summer, for example, when a person in the living room space S1 performs cooling operation of the air conditioner 3 using a remote controller (not shown), the air in the ceiling space S2 is taken into the air conditioner 3 and cooled. The cooling air is blown out to the ceiling space S2 through the duct 31, and thereby the interior of the ceiling space S2 is cooled. And since the lower surface of the housing slab 11 surrounding the ceiling back space S2 and the inner surface of the housing side wall 12 are covered with the heat insulating material 13, the air in the ceiling back space S2 is efficiently cooled.

  Then, when the cooling air blown out from the blowout opening 31a of the duct 31 opened downward contacts the ceiling member 2, heat exchange with the ceiling member 2 is performed, that is, the ceiling member 2 is cooled. The radiant cooling from the ceiling material 2 to the living room space S1 is performed. In other words, the sensible heat of the living room space S1 is taken into the air conditioner 3 from the ceiling material 2 via the ceiling back space S2, and is released to the outside of the housing 1 by its heat pump function. And as mentioned above, since the lower surface of the housing slab 11 surrounding the ceiling space S2 and the inner surface of the housing side wall 12 are covered with the heat insulating material 13, the air in the ceiling space S2 is efficiently cooled. The responsiveness of the rising of the radiant cooling in the living room space S1 is fast.

  On the other hand, the latent heat of the air in the living room space S1 passes through the porous ceiling material 2 excellent in moisture permeability together with the water vapor in the air and enters the ceiling back space S2, and part of the latent heat enters the ceiling material 2. Is also absorbed. Then, the water vapor released from the ceiling material 2 into the ceiling space S2 is taken into the air conditioner 3 and condensed to be drained and discharged to the outside of the housing 1. For this reason, since the ceiling back space S2 has a low relative humidity, water vapor is efficiently taken in from the living room space S1 through the ceiling material 2. And the sensible heat load and latent heat load in living room space S1 are processed by such an effect | action.

  FIG. 4 shows the control operation of the controller 6 during the cooling operation. That is, in the cooling operation, first, when the cooling operation of the air conditioner 3 is turned on (processing step S201), the temperature of the room space S1 detected by the room temperature sensor 4 is set in advance through the input unit 62. It is determined whether the temperature is higher than the temperature (processing step S202). If it is determined that the room temperature is higher than the set temperature (processing step S202 = YES), the suction temperature of the air conditioner 3 detected by the suction temperature sensor 5 is further determined. Is determined to be higher than the preset temperature of the suction temperature set in advance via the input unit 62 (processing step S203), and when it is determined that the suction temperature is higher than the set temperature (processing step S203 = YES), The process returns to step S201, and the cooling operation of the air conditioner 3 is continued. For this reason, the cooling operation gradually reduces the difference in the suction temperature with respect to the suction set temperature and the difference in the room temperature with respect to the room setting temperature.

  On the other hand, when it is determined in process step S202 that the room temperature has dropped to the set temperature (process step S202 = NO), and when it is determined in process step S203 that the suction temperature has dropped to the set temperature (process step S203). = NO), the control which turns off the cooling operation of the air conditioner 3 is performed (step S204).

  In the next processing step S205, the temperature of the room space S1 detected by the room temperature sensor 4 is higher than the room temperature set in advance via the input unit 62 and is detected by the suction temperature sensor 5. If the suction temperature of 3 is higher than the preset temperature of the suction temperature set in advance via the input unit 62, and it is determined that both the room temperature and the suction temperature are higher than the respective set temperatures ( If the process returns to step S201 and the cooling operation of the air conditioner 3 is resumed, and it is determined that at least one of the room temperature and the suction temperature is within the set temperature range (process step S205). = NO), the process returns to step S204, and the stopped state of the air conditioner 3 is maintained.

  FIG. 5 shows the behavior of the air-conditioner suction temperature, ceiling material surface temperature, body temperature, and room temperature during cooling operation in comparison with the present invention and the prior art. That is, when the cooling operation of the air conditioner installed in the ceiling space is controlled based only on the room temperature as in the conventional case, the suction temperature (temperature of the ceiling space) is as shown in FIG. If the temperature environment of the living room space is controlled via the ceiling material by an air conditioner installed in a narrow ceiling space, the ON / OFF cycle of the air conditioner will become longer and the room space will become longer. The range of changes in the temperature of human sensation is relatively large. On the other hand, since the system of the present invention controls the cooling operation of the air conditioner 3 under the and condition from the room temperature and the suction temperature, as shown in FIG. The OFF cycle is shortened, and the air conditioner 3 is not exposed to an extremely low temperature space, thus preventing it from being out of the usable temperature range or continuous operation range specified by the air conditioner manufacturer. be able to. Moreover, the range of change in the temperature of sensation can be reduced and comfort can be improved.

  In addition to the duct type air conditioner 3, the ceiling space S2 shares a heat source (outdoor unit) with the duct type air conditioner 3 and supplies conditioned air to the living room space S1 (not shown). When an air conditioner is provided and the room temperature is significantly different from the set temperature at the start of radiant cooling and heating, both the duct type air conditioner 3 and the convection type air conditioner are driven only in the initial stage of operation. Good.

  In the above-described embodiment, the controller 6 is described as controlling the air conditioner 3 to be turned ON / OFF. You may make it do.

  In the above-described embodiment, the air conditioner 3 is described as a heat pump between the air conditioner 3 and an outdoor unit (not shown). However, the heat source is not limited to the heat pump, and other heat sources are used. Can do. For example, the hot heat source can be a boiler, and the cold heat source can be an absorption refrigerator or a turbo refrigerator. Furthermore, a fan coil unit using these heat sources can be used as the air conditioner 3.

DESCRIPTION OF SYMBOLS 1 Housing 2 Ceiling material 3 Air conditioner 31 Duct 4 Room temperature sensor (room temperature detection means)
5 Suction temperature sensor (suction temperature detection means)
6 Controller (control means)
S1 Living room space S2 Ceiling space

Claims (7)

  An air conditioner installed in a ceiling back space defined in a sealed manner via a ceiling material above the living room space, and by radiation from the ceiling material cooled or heated by conditioned air from the air conditioner In the radiant cooling and heating system for cooling and heating the living room space, the living room temperature detecting means for detecting the temperature of the living room space, the suction temperature detecting means for detecting the suction temperature from the ceiling space to the air conditioner, and the living room temperature The difference between the room temperature detected by the detection means and the preset value of the room temperature, and the difference between the suction temperature detected by the suction temperature detection means and the preset value of the suction temperature are eliminated. And a control means for controlling the drive of the air conditioner.   When the processing by the control means is in heating, the room temperature detected by the room temperature detection means is lower than the set value of the room temperature, and the suction temperature detected by the suction temperature detection means is lower than the set value of the suction temperature A process step of turning on or increasing the heating output of the air conditioner, and heating of the air conditioner when the room temperature is equal to or higher than the set value of the room temperature and / or the suction temperature is equal to or higher than the set value of the suction temperature. The radiant cooling and heating system according to claim 1, further comprising a processing step of turning off or reducing the output of the radiant air.   When the processing by the control means is during cooling, the room temperature detected by the room temperature detecting means is higher than the set value of the room temperature, and the suction temperature detected by the suction temperature detecting means is higher than the set value of the suction temperature. A process step of turning ON or increasing the output of the cooling of the air conditioner, and cooling the air conditioner when the room temperature is equal to or lower than the set value of the room temperature and / or the suction temperature is equal to or lower than the set value of the suction temperature. The radiant cooling and heating system according to claim 1, further comprising a processing step of turning off or reducing the output of the radiant air.   The radiant cooling and heating system according to any one of claims 1 to 3, wherein a duct extending from an outlet of the air conditioner is opened downward, and conditioned air is sprayed onto an upper surface of the ceiling material.   The ceiling material is cooled or heated by conditioned air from an air conditioner installed in a ceiling back space defined in a sealed manner above the living room space through the ceiling material, and the radiation is emitted from the ceiling material. In the radiant cooling and heating method for cooling and heating the living room space, the air conditioning is performed from the difference between the room temperature detected by the room temperature detecting means and the preset value of the room temperature and the ceiling space detected by the suction temperature detecting means. A radiant cooling and heating method, wherein the driving of the air conditioner is controlled so as to eliminate a difference between a suction temperature into the machine and a preset value of the suction temperature.   During heating, when the room temperature is lower than the set value of the room temperature and the suction temperature is lower than the set value of the suction temperature, the heating output of the air conditioner is turned ON or increased, and the room temperature is set to the set value of the room temperature. 6. The radiant cooling and heating method according to claim 5, wherein the heating output of the air conditioner is turned off or reduced when the suction temperature is equal to or higher than a set value of the suction temperature.   During cooling, if the room temperature is higher than the set value of the room temperature and the suction temperature is higher than the set value of the suction temperature, the cooling output of the air conditioner is turned on or increased, and the room temperature is set to the set value of the room temperature. 6. The radiant cooling and heating method according to claim 5, wherein the cooling output of the air conditioner is turned off or reduced below and / or when the suction temperature is equal to or lower than a set value of the suction temperature.

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