JPH07301431A - Underfloor air-conditioning system provided with perimeter load treating function - Google Patents

Abstract

PURPOSE:To permit the treating of perimeter load while saving energy by a method wherein the part of perimeter is heated utilizing hot waste heat generated in a radiator in a cold heat source by the cooling operation of an interior unit. CONSTITUTION:Respective fan coil units 1, 6 for an interior section and a perimeter section are provided in an underfloor air-conditioning machine 106 while the fan coil unit 1 is connected to a cold water tank 101 and a hot-water tank 103 through cold water pipe 2 and the fan coil unit 6 is connected to the cold water tank 101 and the hot-water tank 103 through a hot-water pipe 7 respectively. The cold water tank 101 is connected to a cold heat source 102, provided with a cooling machine 3 and a radiator 4, which are forming a refrigerating cycle, while the hot-water tank 103 is connected to a hot heat source 104. On the other hand, a valve 8 and a bypass pipe 9, which are changing the flow passage of a perimeter cooling and heating water tube 7, are provided and when indoor generating load is big and cooling operation is effected in the interior unit in winter, hot air is sent to the perimeter section of a non air- conditioned room utilizing hot waste heat discharged out of the radiator 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention processes a perimeter load in an underfloor air-conditioning system to efficiently block cold air infiltration in the winter season and heat invasion in the summer season from outside wall surfaces, windows, etc., to provide a comfortable indoor environment. The present invention relates to an underfloor air conditioning system with a perimeter function that achieves both creation and energy saving.

[0002]

2. Description of the Related Art In recent years, air conditioning has been required to pursue energy saving as well as comfort.

Conventionally, in this type of underfloor air conditioning system with a perimeter load processing function, a cold heat source and a hot heat source are separately installed as cold and hot water for interior air conditioning and perimeter load processing, and cold and hot water is supplied to the interior and interior parts. And it has been done by heating and cooling the perimeter section. The configuration will be described below with reference to FIGS.

As shown in the figure, the cold water tank 101 is a cold heat source 1.
02, the hot water tank 103 is connected to the hot heat source 104, the perimeter load processing device 105 is connected to the cold water tank 101, the cold heat source 102, and the hot water tank 103 is connected to the hot heat source 104.
The underfloor air conditioner 106 includes a cold water tank 101 and a cold heat source 1.
02 and the hot water tank 103 are connected to a heat source 104.

In the above structure, the cold heat source for generating cold water is obtained by releasing warm waste heat to the atmosphere, and the cold heat water cooled or heated by the cold heat source and the hot heat source is the perimeter load processing device 105 and the underfloor air conditioner. The air that has been sent to 106 and has undergone heat exchange is blown out to the air-conditioned room 107.

[0006]

In such a conventional underfloor air conditioning system with a perimeter load processing function, if the heat generation load of the OA equipment in the room is large during the winter,
It is necessary to heat the perimeter part for heating and cool the interior part for cooling, and the waste heat from the cold heat source must be released to the atmosphere. There was a problem that it would increase. In addition, since the hot and cold water pipes pass under the floor,
There have been problems such as reducing the space in the double floor for wiring equipment A and preventing the underfloor conditioned air from flowing.

The present invention solves the above problems, and a first object thereof is to perform perimeter load processing for energy saving.

A second object is to perform perimeter load processing simultaneously with interior air conditioning by an underfloor air conditioner.

A third object is to easily switch from heating operation in winter to cooling operation.

A fourth object is to provide a comfortable air temperature with no air temperature difference between the interior part and the perimeter part.

A fifth object is to process a locally large perimeter load such as a window which is easily affected by outside air in the perimeter section.

[0012]

A first means for achieving the first object of the present invention is to provide a fan coil unit for an interior part and a fan coil unit for processing a perimeter load in an underfloor air conditioner. The fan coil unit for the interior part, the cold water tank and the hot water tank are circulated and connected by an interior cold / hot water pipe, and the fan coil unit for the perimeter load processing, the cold water tank and the hot water tank are cold / hot water pipes for the perimeter load processing. The cold water tank is circulated and connected by a cold heat source and a refrigerant pipe, and a cooler and a radiator that form a refrigeration cycle by a refrigerant pipe are provided in the cold heat source, and the hot water tank is by a hot heat source and a refrigerant pipe. It is configured to be provided with a bypass pipe and a valve that are connected in a circulating manner and change the flow path of the cold / hot water pipe for the perimeter.

A second means for achieving the second object is to provide an interior air-conditioning fan coil unit, a perimeter load processing fan coil unit provided in an underfloor air conditioner, and a double floor of an air-conditioned room. A supply chamber for the interior part of the interior air-conditioning fan coil unit, a floor outlet for discharging the air in the double floor, which is attached to a double floor surface, and the perimeter load processing fan coil. A duct for the perimeter portion installed in the double floor under the window of the air-conditioned room connected to the supply chamber for the perimeter portion of the unit, and an opening on the double floor surface communicating with the duct for the perimeter portion The floor outlet is provided.

A third means for achieving the third object is to open and close the floor outlet, an underfloor opening on a side surface of the perimeter portion duct toward the interior portion, and an opening and closing of the underfloor opening. The opening and closing means for performing the above is provided.

Further, a fourth means for achieving the fourth object is a floor outlet for a living area of the perimeter portion installed on the double floor, which is connected to the perimeter portion duct, and a perimeter. An air temperature detecting means for detecting and outputting an air temperature of a perimeter installed on a wall or a pillar of the interior, and an air temperature detecting means for an interior part for detecting and outputting an air temperature of an interior installed in an interior part,
A floor outlet for a residential area of the perimeter portion is calculated by receiving output signals from the perimeter portion air temperature detecting means and the interior portion air temperature detecting means and calculating the air temperature of the perimeter portion and the air temperature of the interior portion. It is configured to have a control means for outputting and controlling.

A fifth means for achieving the fifth object is to provide a radiation panel in contact with the perimeter portion duct on the double floor surface of the perimeter portion which is particularly susceptible to outside air. It was done.

[0017]

According to the present invention, by the configuration of the above-mentioned first means, the perimeter load is saved for energy saving by heating the perimeter part using the warm waste heat generated in the radiator in the cold heat source by the cooling operation of the interior part. Is what you can do.

Further, since the fan coil unit is provided for each of the interior portion and the perimeter portion by the configuration of the second means, the interior portion and the perimeter portion can perform the cooling operation and the heating operation arbitrarily. Perimeter load processing can be performed simultaneously with interior air conditioning by an underfloor air conditioner.

Further, by the structure of the third means, the air is blown from one side of the air-conditioned room to the entire space inside the double floor, so that the heating operation can be performed even in a central portion such as the center of the double floor. It is possible to easily switch from the cooling operation to the cooling operation.

Further, according to the constitution of the fourth means, when the air temperature of the perimeter portion is lower than the air temperature of the interior portion in winter, or when the air temperature of the perimeter portion is higher than the air temperature of the interior portion in summer, By operating the perimeter portion diffusion outlet, the air in the perimeter portion duct is blown to the perimeter portion, the air temperature difference between the perimeter portion and the interior portion is eliminated, and a comfortable air temperature can be obtained.

Further, according to the constitution of the fifth means, not only the air is blown from the floor outlet of the perimeter portion, but also the radiation panel is used to radiate heat, so that a locally large perimeter load generated in the vicinity of the outside air window can be reduced. It can be processed.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS.
This will be described with reference to FIG.

The same parts as those of the conventional example are designated by the same reference numerals and the description thereof will be omitted. As shown in the figure, cold water tank 1
01 and the interior fan coil unit 1 are circulated by an interior hot and cold water pipe 2, and the interior fan coil unit 1 and the hot water tank 103 are branched downstream of the interior fan coil unit 1 and upstream of the cooler 1. Connected by cold / hot water pipe 2, hot water tank 1
03 and interior fan coil unit 1 in cold water tank 1
01 is connected to the interior cold / hot water pipe 2 that merges upstream of the interior fan coil unit 1, the hot water tank 103 and the hot heat source 104 are connected so as to circulate by the refrigerant pipe 5a, and the cold water tank 101 and the cooler 3 are connected to each other. The cooling medium pipe 5b is connected so as to circulate, and the cooling device 3 and the radiator 4 are connected so as to circulate through a cooling medium pipe 5c. Cooler 3
And cold water tank 101 and perimeter fan coil unit 6
To be circulated by a perimeter cold / hot water pipe 7,
The perimeter fan coil unit 6 and the hot water tank 103 are connected by a perimeter cold / hot water pipe 7 that is branched downstream of the perimeter fan coil unit 6 and upstream of the cooler 3, and the hot water tank 103 and the perimeter fan coil unit 6 are connected to the cold water tank 101. Of the three-way valve 8 connected to the perimeter cold / hot water pipe 7 merging upstream of the perimeter fan coil unit 6 downstream of the perimeter and downstream of the perimeter fan coil unit 6 of the perimeter cold / hot water pipe 7 and upstream of the heat source 104.
a is provided, a three-way valve 8b is provided downstream of the hot water tank 103 and upstream of the perimeter fan coil unit 6, and the three-way valve 8a and the three-way valve 8b are connected by the bypass pipe 9, and the bypass pipe 9 passes through the radiator 4. is doing. The interior fan coil unit 1 and the perimeter fan coil unit 6 are inside the underfloor air conditioner 106, the underfloor air conditioner 106 is installed in the air conditioning equipment room 10, and the supply chamber 11 connected to the underfloor air conditioner 106 is installed. Is connected to the double floor 12 of the air-conditioned room 107. A floor outlet 14 is connected to the double floor surface 13 of the air-conditioned room 107 from the inside of the double floor 12, and a lighting integrated lamp opening 15 is installed on the ceiling surface.

With the above construction, as shown in FIG. 2, the load generated in the room such as OA equipment is large, so that the room 1 to be conditioned is heated even in winter.
When the interior part of 07 is being cooled, the radiator 4 radiates heat. The three-way valve 8a is switched so that hot water flows from the perimeter fan coil unit 6 to the radiator 4, and the three-way valve 8b is switched so that hot water flows from the radiator 4 to the perimeter fan coil unit 6. The hot water circulating between the radiator 4 and the perimeter fan coil unit 6 is heated by the heat radiation of the radiator 4 and is sent to the perimeter fan coil unit 6 through the perimeter cold / hot water pipe 7 so that the perimeter fan coil unit 6 is It exchanges heat with the passing air, passes from the underfloor air conditioner 106 through the inside of the double floor 12, and from the floor outlet 14 to the air-conditioned room 107.
The hot air can be blown to the perimeter load processing.

As described above, according to the underfloor air conditioning system with the perimeter load processing function of the first embodiment of the present invention, waste heat generated by the cooling operation of the interior portion is used for heating to perform the perimeter load processing for energy saving. You can

Next, the second embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIGS. Incidentally, the conventional example or the first
The same parts as those in the embodiment are designated by the same reference numerals and the description thereof will be omitted.

Interior fan coil unit 1, interior supply chamber 11a, and air-conditioned room 107
Are connected to each other, and the perimeter fan coil unit 6, the supply chamber 11b, and the air-conditioned room 10 are connected.
The perimeter part duct 17 provided in the double floor 12 below the window 16 of 7 is connected. The perimeter portion duct 17 is connected to a perimeter portion floor outlet 18 having an opening on the double floor 13.

With the above structure, for example, in winter, when heat is generated by OA equipment and lighting and the interior part is cooled, the interior fan coil unit 1 is cooled and the air passing through the interior fan coil unit 1 is cooled. Is blown to the interior supply chamber 11a, the double floor 12, the floor outlet 14, and the air-conditioned room 107
Blow out to. On the other hand, in order to process the perimeter load, the perimeter part performs the heating operation of the perimeter fan coil unit 6, and the air that has passed through the perimeter fan coil unit 6 is blown to the supply chamber 11b and the perimeter duct 17 to blow out the perimeter floor. From 18 is blown to the perimeter portion of the air-conditioned room 107. Since the perimeter fan coil unit 6 and the interior fan coil unit 1 are independent, the operation mode can be individually selected.

As described above, according to the underfloor air conditioning system with the perimeter load processing function of the second embodiment of the present invention, the perimeter load processing can be performed simultaneously with the interior air conditioning by the underfloor air conditioner.

Needless to say, the effect does not change even if the perimeter floor outlet 18 is provided with a blowing means.

Next, the third embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIGS. The conventional example or the second
The same parts as those in the embodiment are designated by the same reference numerals and the description thereof is omitted.

As shown in the figure, a shutter 19 is provided at the perimeter floor outlet 18 and an underfloor opening 21 is provided at a side surface 20 of the perimeter portion duct 17 in the interior direction, and an underfloor shutter 22 for opening and closing the underfloor opening 21 is provided. Provided.

With the above configuration, heating operation is performed in the morning in winter, and when switching to cooling operation due to the load generated indoors during the daytime, cooled air is sent into the perimeter duct 17.
The perimeter floor outlet 18 is closed by a shutter 19 and the underfloor opening 21 is opened by an underfloor shutter 22,
By blowing out from one side of the air-conditioned room 107 to the entire inside of the double floor 12, it is possible to cool the entire inside of the underfloor 12 even in a place where heat is easily accumulated, such as a central portion of the inside of the double floor 12, and from heating operation to cooling. Switching to operation can be easily performed.

As described above, according to the underfloor air conditioning system with the perimeter load processing function of the third embodiment of the present invention, it is possible to easily switch from the heating operation to the cooling operation in the winter season.

In this embodiment, the shutter is used as the opening / closing means for the perimeter floor outlet, but a damper may be used.

In this embodiment, the shutter is used as the opening / closing means for the underfloor opening, but a damper may be used.

Next, the fourth embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIGS. The same parts as those of the conventional example or the second or third embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in the figure, the perimeter floor outlet 18 and the perimeter diffusion outlet 23 installed on the double floor 13 are connected to the perimeter duct 17. The perimeter air temperature detection device 24 that detects and outputs the perimeter air temperature is installed on a wall or a pillar that is not the window surface of the perimeter, and the interior air temperature detection device 25 that detects and outputs the air temperature of the interior is covered. Air-conditioned room 107
The control device 26 is installed in the interior part of the vehicle and calculates the air temperature of the perimeter part and the air temperature of the interior part to control the diffusion outlet of the perimeter part.

With the above structure, for example, when hot air is blown from the perimeter floor outlet 18 toward the window side wall which is the perimeter portion of the air-conditioned room 107 from the perimeter duct 17 (when the perimeter portion is heated). Air temperature (Tp) of the perimeter portion detected by the unit air temperature detection device 24 and the interior air temperature detection device 25
The air temperature (Ta) of the interior portion detected by the controller 26 is calculated by the control device 26, and when the air temperature of the perimeter portion is higher than the air temperature of the interior portion (Tp> Ta), the control device 26 causes the diffusion outlet 23 of the perimeter portion 23 Does not work and does not blow air. On the contrary, the air temperature of the perimeter part detected by the perimeter part air temperature detection device 24 (T
p) and the air temperature (Ta) of the interior part detected by the air temperature detection device 25 of the interior part are calculated by the control device 26, and when the air temperature of the perimeter part is lower than the air temperature of the interior part (Tp <Ta), the perimeter The partial diffusion outlet 23 is operated by the control device 26, and the air-conditioned room 10
The hot air in the perimeter portion duct 17 is blown to the perimeter portion in 7. The air temperature in the perimeter portion can be raised by the diffused air blown out from the perimeter portion diffusion outlet 23, and the difference in air temperature from the interior portion can be reduced.

On the other hand, when low-temperature air is blown from the floor outlet 18 of the perimeter portion to the window side wall of the air-conditioned room 107 which is the perimeter portion (when the perimeter portion is cooled), the air temperature of the perimeter portion is reduced. Air temperature (Tp) of the perimeter detected by the detector 24
And the air temperature (Ta) of the interior part detected by the interior air temperature detection device 25 is calculated by the control device 26 and the air temperature of the perimeter part is lower than the air temperature of the interior part (Tp <Ta), diffusion of the perimeter part The outlet device 25 is not operated by the control device 26. On the contrary, the controller 26 calculates the air temperature (Tp) of the perimeter portion detected by the air temperature detector 24 for the perimeter portion and the air temperature (Ta) of the interior portion detected by the air temperature detector 23 for the interior portion, and the air temperature of the perimeter portion is calculated. Is higher than the air temperature of the interior portion (Tp> Ta), the perimeter diffusion outlet 23 is operated by the control device 26 to cause the perimeter portion to blow the low temperature air in the perimeter duct 17. The air temperature in the perimeter portion can be lowered by the diffused air blown out from the perimeter portion diffusion outlet 23, and the air temperature difference with the interior portion can be reduced.

As described above, according to the underfloor air conditioning system with the perimeter load processing function of the fourth embodiment of the present invention, when the air temperature of the perimeter portion is lower than the air temperature of the interior portion in the winter, or in the summer, the perimeter portion is cooled. When the temperature of the air is higher than the temperature of the interior part, by operating the diffusion outlet of the perimeter part, there is no difference in air temperature between the interior part and the perimeter part, and a comfortable air temperature can be obtained.

Although the perimeter diffusion outlet is operated according to the temperature information from the temperature detecting means in this embodiment, it may be manually operated.

In this embodiment, one temperature detecting means is installed in each of the perimeter section and the interior section. However, a plurality of temperature detecting means are installed in the vicinity of the person in the room, and the perimeter diffusion openings are individually provided. You may make it correspond and operate.

In this embodiment, the diffusion type outlet is used as the floor outlet, but other outlet type outlets,
For example, a porous blowout port may be used.

Next, a fifth embodiment of the present invention will be described with reference to FIG.
The description will be made with reference to 2 to 13. As shown in the figure, radiation that radiates heat from the perimeter portion duct 17 is in contact with the perimeter portion duct 17 on the double floor surface below the window, which is one of the perimeter portions that is particularly susceptible to the outside air. A panel 27 is installed.

With the above structure, for example, when hot air is blown from the perimeter floor outlet 18 toward the window side wall which is the perimeter portion of the air-conditioned room 107 from the perimeter duct 17, the radiation panel 27 causes the perimeter duct to move. The air-conditioned room 1 is heated by the high-temperature air flowing in 17
Heat can be radiated to 07.

Further, low-temperature air is blown from the perimeter portion floor outlet 18 toward the window side wall which is the perimeter portion of the air-conditioned room 107 from the perimeter portion duct 17, and the radiation panel 27 causes the low temperature air flowing in the perimeter portion duct 17 to flow. It is possible to radiate cold heat to the air-conditioned room 107.

As described above, according to the underfloor air conditioning system with the perimeter load processing function of the fifth embodiment of the present invention, even if the perimeter is easily affected by outside air, such as near the window surface, the perimeter is not affected. Not only hot air is blown out from the floor air outlet, but also a radiation panel is used to radiate heat, and a locally large perimeter load generated near the outside air window can be treated.

[0049]

As is apparent from the above embodiments, according to the present invention, the perimeter load having an effect that the waste heat generated by the cooling operation of the interior portion is used for heating to perform the perimeter load processing for energy saving. An underfloor air conditioning system with a processing function can be provided.

Further, it is possible to provide an underfloor air conditioning system with a perimeter load processing function, which is effective in performing perimeter load processing simultaneously with interior air conditioning by an underfloor air conditioner.

Further, it is possible to provide an underfloor air conditioning system with a perimeter load processing function, which is effective in easily switching from the heating operation to the cooling operation in winter.

Further, when the air temperature of the perimeter portion is lower than the air temperature of the interior portion in winter, or when the air temperature of the perimeter portion is higher than the air temperature of the interior portion in summer, the diffusion outlet of the perimeter portion is operated. As a result, it is possible to provide an underfloor air conditioning system with a perimeter load processing function, which has an effect of keeping a comfortable air temperature without a difference in air temperature between the interior portion and the perimeter portion.

Further, not only in the vicinity of the window surface but also in the place where the perimeter is easily affected by the outside air, not only the hot air is blown from the floor outlet of the perimeter,
It is possible to provide an underfloor air conditioning system with a perimeter load processing function, which has an effect of performing heat radiation by the radiation panel and capable of processing a large perimeter load partially.

[Brief description of drawings]

FIG. 1 is a system diagram of an underfloor air conditioning system with a perimeter load processing function according to a first embodiment of the present invention.

[Fig. 2] Operating system diagram when cooling the interior part in the same winter season

FIG. 3 is a sectional view of the same.

FIG. 4 is a horizontal sectional view of the same second embodiment at the level of the double floor surface.

FIG. 5 is a vertical sectional view of the same.

FIG. 6 is a vertical sectional view of an underfloor air conditioning system with a perimeter load processing function according to the third embodiment.

FIG. 7 is a horizontal cross-sectional view at the inner level under the double floor.

FIG. 8 is a horizontal sectional view of the underfloor air conditioning system with a perimeter load processing function of the fourth embodiment at a double floor level.

FIG. 9 is a vertical sectional view of the same.

[Fig. 10] The same control diagram

FIG. 11 is a control flow chart of the same.

FIG. 12 is a horizontal sectional view at the double floor level of the underfloor air conditioning system with the perimeter load processing function of the fifth embodiment.

FIG. 13 is a vertical sectional view of the same.

FIG. 14 is a system diagram of a conventional underfloor air conditioning system with a perimeter load processing function.

FIG. 15 is a sectional view of the same.

[Explanation of symbols]

 1 Interior part fan coil unit 2 Interior cold / hot water pipe 3 Cooler 4 Radiator 5 Refrigerant pipe 6 Perimeter fan coil unit 7 Perimeter cold / hot water pipe 8 Three-way valve 9 Bypass pipe 11 Supply chamber 11a Interior supply chamber 11b Perimeter supply chamber 12 Inside of double floor 13 Double floor 14 Floor outlet 16 Window 17 Perimeter duct 18 Perimeter floor outlet 19 Shutter 20 Side 21 Underfloor opening 22 Underfloor shutter 23 Perimeter diffusion outlet 24 Perimeter air temperature detector 25 Interior Air Temperature Detection Device 26 Control Device 27 Radiant Panel 101 Cold Water Tank 102 Cold Heat Source 103 Hot Water Tank 104 Hot Heat Source 105 Perimeter Load Handling Device 106 Underfloor Air Conditioner 107 Aerated Preparation room

Claims (5)

[Claims] 1. An underfloor air conditioner is provided with a fan coil unit for an interior part and a fan coil unit for processing a perimeter load, and the fan coil unit for the interior part, a cold water tank and a hot water tank are provided by an interior cold / hot water pipe. The perimeter load processing fan coil unit, the cold water tank and the hot water tank are circulated and connected by a perimeter load processing cold / hot water pipe, and the cold water tank is circulated and connected by a cold heat source and a refrigerant pipe. A cooling machine and a radiator for forming a refrigeration cycle by a refrigerant pipe are provided, the hot water tank is circulated and connected by a hot water source and a refrigerant pipe, and a valve and a bypass pipe for changing a flow path of the cold / hot water pipe for the perimeter are provided. Underfloor air conditioning system with perimeter load handling function. 2. An interior air conditioning fan coil unit, a perimeter load processing fan coil unit provided in an underfloor air conditioner, and an interior portion of the interior air conditioning fan coil unit connected to a double floor of an air-conditioned room. Supply chamber and a floor outlet attached to the double floor for blowing out the air in the double floor, and a window of an air-conditioned room connected to the supply chamber for the perimeter section of the fan coil unit for perimeter load processing A duct for the perimeter section installed in the double floor under the
An underfloor air conditioning system with a perimeter load processing function, which is provided with a floor outlet that is in communication with the perimeter duct and has an opening on the double floor. 3. The perimeter according to claim 2, wherein an opening / closing means for opening / closing the floor outlet and an opening / closing means for opening / closing the opening under the floor are provided on a side surface of the duct for the perimeter portion in a direction toward an interior portion. Underfloor air conditioning system with load processing function. 4. A floor outlet for a living area of the perimeter installed on the double floor connected to the duct for the perimeter, and an air temperature of the perimeter installed on a wall or a pillar of the perimeter are detected. From the perimeter air temperature detecting means, the interior part air temperature detecting means for detecting and outputting the air temperature of the interior part installed in the interior part, the perimeter air temperature detecting means and the interior part air temperature detecting means 2. The control means for receiving the output signal of the above, calculating the air temperature of the perimeter portion and the air temperature of the interior portion, outputting the signal to the floor outlet for the residential area of the perimeter portion, and controlling the air temperature. Underfloor air conditioning system with perimeter load handling function. 5. An underfloor air conditioning system with a perimeter load processing function according to claim 2, 3 or 4, wherein a radiation panel in contact with the perimeter portion duct is provided on the double floor surface of the perimeter portion that is particularly susceptible to outside air. system.