JP2789080B2 - Cold exercise room - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low-temperature exercise room used for exercise performed at extremely low temperatures for health management and training.

[0002]

2. Description of the Related Art Exercise for health management and training is usually carried out outdoors or indoors air-conditioned at room temperature. However, the results of health management and training must be achieved if excess energy in the body is not sufficiently consumed. Is not enough,
He spent some time exercising.

On the other hand, it has been found that when exercising at an extremely low temperature of about -50 ° C to -75 ° C, excess energy in the body can be sufficiently consumed in a short time. However, to cool the room for performing this exercise (hereinafter referred to as an exercise room) to an extremely low temperature, the exercise room must be sealed. Breathing pollutes the air in the room and causes a lack of oxygen. Therefore, it is necessary to sufficiently ventilate the exercise room.

However, when outside air is introduced into the exercise room as it is for ventilation, the temperature of the exercise room rises due to the heat of the outside air. In addition, the moisture contained in the outside air may frost on the doors of the exercise room and the doors may not be opened and closed smoothly, and the moisture may freeze and adhere to the exercisers in the exercise room, and the exercisers may suffer from frostbite. Could be. As a countermeasure, air is sent into the exercise room after dehumidifying and cooling the outside air,
It is conceivable to simultaneously perform cooling and ventilation in the exercise room.

[0005]

However, since the heat capacity of air is small, cooling the exercise room only with cooled outside air requires a long time for cooling. Moreover,
Since the temperature of the outside air is considerably higher than the temperature in the exercise room (about -50 ° C to -75 ° C), cooling the outside air and accurately controlling the temperature to, for example, -50 ° C complicates the control. In addition, it is inefficient. It is an object of the present invention to quickly and accurately perform temperature control while sufficiently ventilating an exercise room.

[0006]

In order to achieve the above object, the present invention is configured as follows, for example, as shown in FIG. That is, the exercise room 1, the heat exchange cooler 2, the cool air supply device 3, and the refrigerant supply source 4
Is a dehumidifying section 38 for dehumidifying the introduced outside air, a dehumidifying section 38 for dehumidifying the introduced outside air, a cooling section 39 for cooling the dehumidified outside air, and sending out the cooled outside air. A cooling air discharge port 33; a heat exchange cooler 2 and a cool air discharge port 33 provided in the exercise chamber 1; a refrigerant supply source 4 provided outside the exercise chamber 1; Can be supplied to the heat exchange cooler 2 and the dehumidifying section 38 and the cooling section 39 of the cool air supply device 3, respectively, and detect the temperature in the exercise room 1 to reach a temperature of −50 ° C. to −75 ° C. Control means 55 is provided for controlling the supply of the cooling refrigerant from the refrigerant supply source 4 to the heat exchange cooler 2 so as to perform cooling.

[0007]

The present invention operates as follows, for example, as shown in FIG. Cooling refrigerant from the refrigerant supply source 4 is supplied to the heat exchange cooler 2, and the heat exchange cooler 2 exchanges heat with air in the exercise room 1, thereby directly cooling the inside of the exercise room 1. Further, the temperature in the exercise room 1 is reduced by −5 by the control means 55.
The coolant supply source 4 is maintained at a temperature of 0 ° C to -75 ° C.
The supply of the refrigerant for cooling from the to the heat exchanger / cooler 2 is controlled.

On the other hand, a cooling refrigerant from the refrigerant supply source 4 is supplied to the dehumidifying section 38 and the cooling section 39 of the cool air supply device 3. Then, after the outside air introduced from the outside air introduction unit 31 of the cool air supply device 3 is dehumidified by the dehumidification unit 38, the cooling unit 3
Cooled at 9. The cooled outside air is supplied to the cool air discharge port 3
3, the air is sent out into the exercise room 1, and the inside of the exercise room 1 is ventilated.

[0009]

The present invention has the following effects because it is constructed and operates as described above. A heat exchange cooler is provided in the exercise room to directly cool the exercise room, and by controlling the supply of the refrigerant for cooling to the heat exchange cooler, the exercise room is lowered by -5.
Since the temperature is controlled to 0 ° C. to −75 ° C., the temperature in the exercise room can be quickly and accurately controlled, and the temperature in the exercise room can be quickly increased by the heat of the exerciser exercising in the exercise room. Can be suppressed.

Further, since the outside air introduced into the exercise room for ventilation is dehumidified and cooled, the temperature of the inside of the exercise room is prevented from rising due to the heat of the outside air while sufficiently ventilating the inside of the exercise room. The moisture contained in the outside air can be prevented from forming frost on the heat exchange cooler or the door of the exercise room, thereby preventing the cooling of the exercise room by the heat exchange cooler and the smooth opening and closing of the exercise room door from being hindered. It is possible to prevent the water from freezing and adhering to the exerciser in the exercise room to cause the exerciser to suffer from frostbite. Moreover,
Since the outside air may be cooled by an amount required for ventilation, the cooling efficiency is higher than in the case where the exercise room is cooled only by cooling the outside air and sending the air into the exercise room.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a low-temperature exercise room according to the present invention will be described below with reference to FIGS. 1 is a schematic configuration diagram of the low-temperature exercise room, FIG. 2 is a perspective view of a heat exchange cooler provided in the low-temperature exercise room of FIG. 1, and FIG. 3 is a detailed configuration of a main part of the cold air supply device of FIG. FIG. 4 is a detailed configuration diagram of a refrigerant supply source connected to the heat exchange cooler.

First, a schematic structure of the low-temperature exercise room will be described with reference to FIG. The low-temperature exercise room includes an exercise room 1 divided into a main room 1a and a pre-cooling room 1b, and a main room 1 of the exercise room 1.
a heat exchange cooler 2 provided on the ceiling in the main room 1a; a cool air supply device 3 provided with a cool air discharge port 33 in the ceiling in the main room 1a to introduce outside air into the main room 1a; 2 placed
Supply source 4 consisting of two independent refrigerators 14 and 15
And a monitoring panel 13 arranged outside the exercise room 1.

The first refrigerator 14 is connected to the heat exchanger 2 via a refrigerant conduit 6, and the second refrigerator 15 is connected to the cool air supply device 3 via a refrigerant conduit 7. . The cooling refrigerant from the first refrigerator 14 is circulated to the heat exchanger / cooler 2 to exchange heat with the air in the main room 1a, thereby cooling the inside of the main room 1a. on the other hand,
The cooling air from the second refrigerator 15 is circulated through the cold air supply device 3 to dehumidify and cool the outside air introduced into the main room 1a.

Next, the detailed structure of the above-mentioned exercise room 1, heat exchange cooler 2, cool air supply device 3, refrigerant supply source 4, and monitoring panel 13 will be described. In the exercise room 1, the floor wall, the side wall, the ceiling wall, and the partition wall 1c are each formed of a heat insulating panel.

This heat insulating panel is constructed by sandwiching a heat insulating flat plate such as a foamed resin between a metal plate and a synthetic resin plate. As described above, by sandwiching the heat insulating plate made of a foamed resin or the like between the metal plates or the like, the outside air is prevented from entering the exercise room 1 through the wall of the exercise room 1. In addition, the joints of the heat insulating panels are sealed to improve airtightness. In addition, mats, cloths, and the like are affixed inside the exercise room 1 of the heat insulating panel,
The feeling of contact on the inner surface of the exercise room 1 is reduced.

The main room 1a of the exercise room 1 and the pre-cooling room 1b
An entrance 16 and a ventilation hole 17 with a relief damper are formed in a partition wall 1c that divides the inside and the inside, and the entrance 16 is provided with an inner door 18 having a heat insulating structure. And
The main room 1a is operated by the function of the ventilation hole 17 with the relief damper.
The inside pressure is made higher than that in the pre-cooling chamber 1b so that the low-temperature air in the main chamber 1a flows to the pre-cooling chamber 1b.

An entrance 26 and a ventilation hole 27 with a relief damper are formed in a partition wall between the precooling chamber 1b and the outside, and an outer door 28 having a heat insulating structure is provided at the entrance 26. And the ventilation hole 27 with the relief damper
The pressure in the pre-cooling chamber 1b is made higher than that of the outside by the action of, so that the low-temperature air in the pre-cooling chamber 1b flows only to the outside and is exhausted.

As described above, since the air pressure in the pre-cooling chamber 1b is made higher from the outside and the air pressure in the main room 1a is made higher than that of the pre-cooling chamber 1b, the relatively high-temperature outside air flows through the ventilation holes 27 and 17.
Through the pre-cooling chamber 1b and the main chamber 1a. The inner door 18 and the outer door 28 have
Peep windows (not shown) are provided, each having a vacuum layer interposed between double glasses provided with a defrosting heat wire. A microphone 8, a speaker 9, a monitor camera 10, a temperature sensor 11, and an oxygen concentration sensor 12 are provided at appropriate places in the main room 1a, and these are connected to the monitoring panel 13.

As shown in FIG. 2, the heat exchange cooler 2
It is configured as follows. This heat exchange cooler 2 is a cooler 2
0 and a blower 21 that blows air through the cooler 20. The cooler 20 is of a plate fin and tube type in which a refrigerant conduit 22 bent in multiple stages is passed through a plurality of heat conducting plates 23 arranged side by side in the horizontal direction.

The refrigerant conduit 22 is formed of a member such as a copper tube or an aluminum tube having high thermal conductivity.
A feed pipe 6a and a return pipe 6b of the refrigerant conduit 6 are connected to both ends of the pipe 2, respectively. Further, an expansion valve 60 is provided at a connection portion between the feed pipe 6a of the refrigerant conduit 6 and the refrigerant conduit 22.
Is provided. The heat conduction plate 23 is formed of a copper plate or an aluminum plate having high heat conductivity,
A defrost heater 24 is provided. This defrost heater 24
Thus, the frost adhering to the heat conducting plate 23 is thawed and removed.

The refrigerant for cooling from the first refrigerator 14 passes through the feed pipe 6a of the refrigerant conduit 6 and the expansion valve 60.
, And is sent to the refrigerant conduit 22 of the cooler 20 to be vaporized and cooled to a low temperature, and exchanges heat with the air in the main chamber 1 a through the heat conducting plate 23. Thereby, the interior of the main room 1a is cooled. The refrigerant after the heat exchange is returned to the first refrigerator 14 through the return pipe 6b of the refrigerant conduit 6 and cooled.

As shown in FIGS. 1 and 3, the cool air supply device 3 is configured as follows. This cold air supply device 3
Accommodates an outside air introduction unit 31 and an outside air cooling unit 32 in a casing 30 having a heat insulating structure.
A duct 34 having a heat insulation structure extends from 0 to a cool air discharge port 33 opened in the main room 1a of the exercise room 1.

The outside air introduction section 31 is constructed by providing a blower 35 between the opening 36 of the casing 30 and the outside air cooling section 32. A filter 37 for dust removal is provided in the opening 36. As the blower 35, for example,
A high static pressure sirocco fan suitable for duct ventilation is used. The outside air cooling unit 32 includes a dehumidifying unit 38 that cools and condenses the outside air to dehumidify the air and a dehumidified outside air, for example, −
A cooling unit 39 for cooling to about 50 ° C. to −60 ° C.

The dehumidifying section 38 and the cooling section 39 are each of a plate fin-and-tube type in which a refrigerant conduit made of a copper pipe, an aluminum pipe, or the like penetrates a plurality of heat conducting plates. The heat conducting plate of the cooling unit 39 is provided with a defrost heater 39a.

Both ends of the refrigerant pipes of the dehumidifying section 38 and the cooling section 39 are connected to a feed pipe 7a and a return pipe 7b of the refrigerant pipe 7, respectively.
And are connected to the second refrigerator 15 in parallel. An expansion valve 70 is provided at the connection between the refrigerant pipes of the dehumidifying section 38 and the cooling section 39 and the feed pipe 7a of the refrigerant pipe 7.
Are provided respectively. Further, a pressure adjusting valve 71 is provided at a connection portion between the dehumidifying section 38 and the return pipe 7b of the refrigerant conduit 7. The supply pressure of the refrigerant to the dehumidifying unit 38 is adjusted by the pressure adjusting valve 71 such that the temperature of the dehumidifying unit 38 is, for example, −0 ° C. to −5 ° C.

The refrigerant for cooling from the second refrigerator 15 passes through the feed pipe 7a of the refrigerant conduit 7 and passes through the expansion valve 70.
Each of them is decompressed and expanded at 70 and sent to the refrigerant conduits of the dehumidifying section 38 and the cooling section 39 of the outside air cooling section 32 to be vaporized to a low temperature. Thereby, the outside air sucked from the opening 36 is cooled and dehumidified by the dehumidifying unit 38, and is cooled by the cooling unit 39.
For example, after being cooled to about −50 ° C. to −60 ° C., the main room 1 a of the exercise room 1 is passed through the duct 34 from the cool air discharge port 33.
Sent out.

The heat-exchanged refrigerant is returned to the second refrigerator 15 through the return pipe 7b of the refrigerant conduit 7 and cooled.
The water droplets generated by the dehumidification of the dehumidifying section 38 are stopped by a drain pan 30 a provided at the bottom of the casing 30 and drained out of the casing 30.

The configuration of the refrigerant supply source 4 will be described by taking the first refrigerator 14 shown in FIG. 4 as an example. The second refrigerator 15 has the same configuration as the first refrigerator 14. The first refrigerator 14 is of a two-stage compression type, and is interposed between the return pipe 6b and the feed pipe 6a of the refrigerant conduit 6. That is, the return pipe 6 b of the refrigerant conduit 6 is connected to the low-pressure compressor 40 of the first refrigerator 14, the refrigerant mixing section 42,
The high-pressure compressor 41, the refrigerant conduit 43 a of the condenser 43, the liquid receiver 44, and the refrigerant conduit 45 a of the liquid cooler 45 are sequentially connected to the feed pipe 6 a of the refrigerant conduit 6.

The conduit from the liquid receiver 44 to the refrigerant conduit 45a of the liquid cooler 45 is branched on the way, and the branch pipe 48 is connected to the expansion valve 46 and the heat absorbing portion 45 of the liquid cooler 45.
b, connected to the high-pressure compressor 41 via the refrigerant mixing section 42; The condenser 43 is configured as a plate fin and tube type in which a refrigerant conduit 43a made of a copper tube, an aluminum tube, or the like penetrates a plurality of heat conducting plates (not shown), and is blown by a blower 43b. The gaseous refrigerant compressed by the compressors 40 and 41 is cooled and condensed and liquefied. Note that the condenser 43 may be configured to water-cool the refrigerant with cooling water instead of the air blower 43b.

Then, a refrigerant conduit 6 from the heat exchange cooler 2
The refrigerant returned to the first refrigerator 14 through the return pipe 6b of
After being compressed by the low-pressure compressor 40, intermediately cooled through the refrigerant mixing section 42, and further compressed to a high pressure by the high-pressure compressor 41, it is condensed and liquefied by the condenser 43 and received by the receiver 44. This liquefied refrigerant is divided and partly expanded.
6 and the remainder is sent to the refrigerant conduit 45 a of the liquid cooler 45.

That is, a part of the condensed and liquefied refrigerant is decompressed and expanded by the expansion valve 46, and the heat absorbing portion 45 of the liquid cooler 45 is provided.
The liquid is cooled to a low temperature by being sent to b and cooled by absorbing the refrigerant flowing through the refrigerant conduit 45a of the liquid cooler 45. The refrigerant cooled by the refrigerant conduit 45a of the liquid cooler 45 is sent to the heat exchanger / cooler 2 through the feed pipe 6a of the refrigerant conduit 6. On the other hand, the refrigerant whose temperature has risen by absorbing heat from the refrigerant passing through the refrigerant conduit 45 a in the heat absorbing portion 45 b of the liquid cooler 45 is sent to the high-pressure compressor 41 via the refrigerant mixing portion 42.

As described above, the first refrigerator 14 and the second refrigerator 15 are configured as a two-stage compression type of the low-pressure compressor 40 and the high-pressure compressor 41, so that compared to the case where only one compressor is provided. The compression ratio of each of the compressors 40 and 41 can be reduced, and the efficiency of the refrigeration cycle can be improved. In addition, the temperature of the refrigerant sent out from each of the compressors 40 and 41 can be lowered, respectively.
The deterioration of the lubricating oil and packing of 4.15 can be reduced.

The monitoring panel 13 is configured as follows, as shown in FIG. The monitoring panel 13 has a microphone 51, a speaker 52, a monitor television 53, and a display 54, and also has a control device (control means) 55 and a recorder 56 therein. The microphone 51 and the speaker 52 can communicate with the microphone 8 and the speaker 9 in the main room 1a of the exercise room 1, and the monitor television 53 displays the inside of the main room 1a photographed by the monitor camera 10. Is what you do.

The indicator 54 is the main room 1 of the exercise room 1.
The room temperature and the oxygen concentration in the main room 1a detected by the temperature sensor 11 and the oxygen concentration sensor 12 in a are displayed. Also,
The display 54 is provided with an alarm buzzer (not shown) so that the alarm buzzer sounds when the oxygen concentration in the main room 1a is, for example, 16% or less or 25% or more.

The controller 55 controls the main room 1a according to the detection result of the temperature sensor 11 in the main room 1a of the exercise room 1.
The first refrigerator 14 so that the room temperature of the first refrigerator 14 becomes, for example, −50 ° C.
By controlling the operation and stop of the low-pressure compressor 40 and the high-pressure compressor 41, the circulation of the refrigerant to the heat exchange cooler 2 is controlled. Thereby, the room temperature of the main room 1a is maintained at -50 ° C. Further, the room temperature and the oxygen concentration in the main room 1a are recorded on a recording paper by the recorder 56.

As described above, the heat exchange cooler 2 is provided in the main room 1a of the exercise room 1, and the inside of the main room 1a is directly cooled, and the cooling from the first refrigerator 14 to the heat exchange cooler 2 is performed. The inside of the main room 1a is controlled to, for example, −50 ° C. by controlling the circulation of the refrigerant for use, so that the temperature control in the main room 1a can be performed quickly and accurately. Room 1
A rise in the temperature in the main room 1a due to the heat of the exerciser exercising in the area a can be quickly suppressed.

Since the outside air introduced into the main room 1a of the exercise room 1 for ventilation is dehumidified and cooled, the temperature of the inside of the main room 1a is controlled by the heat of the outside air while sufficiently ventilating the inside of the main room 1a. Is prevented from rising. In addition, moisture contained in the outside air is frosted on the cooler 20 of the heat exchanger / cooler 2 and the inner door 18 and the like.
8 can be prevented from being hindered from opening and closing smoothly, and the water can be prevented from freezing and adhering to the exerciser in the main room 1a, thereby preventing the exerciser from suffering frostbite. Moreover,
It is good to cool the outside air by the amount necessary for ventilation, so only by cooling the outside air and sending it into the main room 1a of the exercise room 1,
The cooling efficiency is higher than when the inside of the exercise room 1 is cooled.

Next, a second embodiment of the low-temperature exercise room according to the present invention will be described with reference to FIG. FIG. 5 is a configuration diagram of the low-temperature exercise room of the second embodiment. This second embodiment has substantially the same configuration as the first embodiment, except that the refrigerant of the refrigerant supply source 4 supplied to the heat exchange cooler 2 and the cool air supply device 3 is liquid nitrogen. It is. The components having the same functions as those of the first embodiment are denoted by the same reference numerals.

That is, the cooler 20 of the heat exchange cooler 2 is
It is connected to a liquid nitrogen storage tank 81 via a refrigerant conduit 80. The refrigerant conduit 80 is branched in the middle, and the branch pipe 82 is connected to the outside air cooling unit 32 of the cold air supply device 3 through an opening / closing control electromagnetic valve 83. It is then opened to the atmosphere.

An electromagnetic valve 84 for opening and closing control is provided between the branch point of the refrigerant conduit 80 and the heat exchanger / cooler 2. Further, a heat exchanger 86 surrounding the middle of the duct 34 of the cool air supply device 3 is provided in an exhaust pipe 85 from the cooler 20 of the heat exchange cooler 2.
And then open to the atmosphere. The liquid nitrogen storage tank 81 is provided with a filling valve 87 for refilling the tank 81 with liquid nitrogen and a safety blow valve 88 for maintaining the pressure in the tank 81 at a predetermined pressure or less. It is.

Then, the liquid nitrogen supplied from the liquid nitrogen storage tank 81 to the cooler 20 of the heat exchange cooler 2 is vaporized by the cooler 20 to a low temperature, and the air in the main room 1a of the exercise room 1 is cooled. And the air in the main room 1a is cooled. The vaporized liquid nitrogen passes through the heat exchanger 86 from the cooler 20, absorbs the outside air flowing in the duct 34 of the cold air supply device 3, cools the air, and is then exhausted to the atmosphere.

On the other hand, the liquid nitrogen supplied from the liquid nitrogen storage tank 81 to the outside air cooling section 32 of the cold air supply device 3 is vaporized by the outside air cooling section 32 to have a low temperature, and is sucked from the opening 36. After the outside air is cooled and dehumidified and further cooled to, for example, about −60 ° C. to −70 ° C., it is sent to the duct 34 of the cool air supply device 3. The cooled outside air is further cooled by the heat exchanger 86 while passing through the duct 34, and then is discharged from the cool air discharge port 33 to the main room 1 a of the exercise room 1.
Sent out.

The control device 55 of the monitoring panel 13 responds to the detection result of the temperature sensor 11 in the main room 1a of the exercise room 1,
The opening degree of the opening / closing control solenoid valve 84 is controlled so that the room temperature of the main room 1a becomes, for example, −50 ° C., and the supply of liquid nitrogen to the cooler 20 of the heat exchanger cooler 2 is controlled. by this,
The room temperature of the main room 1a is maintained at -50C. The control device 55 controls the solenoid valve 83 for opening and closing control according to the operation of an operation switch (not shown).

As described above, in the second embodiment, since the cooling heat of the liquid nitrogen remaining in the heat exchange in the cooler 20 of the heat exchanger cooler 2 is used for cooling the outside air, the liquid nitrogen can be efficiently used. Can be used. In each of the above embodiments, the room temperature of the main room 1a of the exercise room 1 is appropriately selected from the range of about -50 ° C to -75 ° C.

The first embodiment can be modified as follows. That is, in the first embodiment, the refrigerators 14 and 15 are configured as a two-stage compression type, but one or both of the refrigerators 14 and 15 may be configured as a single-stage compression type. In the second embodiment, liquid nitrogen is used as the refrigerant, but liquid air or the like may be used.

Further, in each of the above embodiments, the exercise room 1
According to the detection result of the oxygen concentration sensor 12 in the main room 1a, the control device 55 of the monitoring panel 13 controls the amount of air blown by the blower 35 of the cool air supply device 3, and when the oxygen concentration in the main room 1a decreases, The blower 35 may be controlled to increase the blown air amount, and the blown air amount may be reduced if the oxygen concentration does not decrease.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a first embodiment of a low-temperature exercise room according to the present invention.

FIG. 2 is a perspective view of a main part of a heat exchange cooler provided in the low-temperature exercise room.

FIG. 3 is a detailed configuration diagram of the cold air supply device of the low-temperature exercise room.

FIG. 4 is a detailed configuration diagram of a refrigerant supply source connected to the heat exchange cooler.

FIG. 5 is a schematic configuration diagram showing a second embodiment of the low-temperature exercise room of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Exercise room, 1a ... Main room, 1b ... Pre-cooling room, 2 ... Heat exchange cooler, 3 ... Cold air supply device, 4 ... Refrigerant supply source, 14 ... 1st refrigerator, 15 ... 2nd refrigerator, 13 ... Monitoring panel, 31: outside air introduction section, 33: cool air discharge port, 38: dehumidification section, 39: cooling section, 55: control device (control means).

Claims (3)

(57) [Claims] An exercise room (1), a heat exchange cooler (2), a cool air supply device (3), and a refrigerant supply source (4), wherein the cool air supply device (3) introduces outside air. An outside air introduction unit (31) for supplying air, and a dehumidification unit for dehumidifying the introduced outside air
(38) and a cooling unit (39) for cooling the dehumidified outside air
And a cool air discharge port (33) for sending out the cooled outside air, while providing the heat exchange cooler (2) and the cool air discharge port (33) in the exercise room (1), The refrigerant supply source (4) is provided outside the exercise chamber (1), and a cooling refrigerant is supplied from the refrigerant supply source (4) to the heat exchange cooler.
(2) and the dehumidifying part (38) and the cooling part (39) of the cold air supply device (3) are configured to be capable of supplying the air, and the temperature in the exercise room (1) is detected to be −50 ° C. ~ -75 ° C
Control means (55) for controlling the supply of the cooling refrigerant from the refrigerant supply source (4) to the heat exchanger / cooler (2) so as to cool to a temperature of Exercise room. 2. The low-temperature exercise room according to claim 1, wherein said refrigerant supply source (4) is connected to two independent refrigerators (14).
(15), and a refrigerant for cooling is circulated to the heat exchange cooler (2) by one refrigerator (14), and a refrigerant for cooling is cooled by the other refrigerator (15) to the cold air supply device. (3) It is configured to circulate. 3. The low-temperature exercise chamber according to claim 1, wherein the cooling refrigerant is made of liquid nitrogen, and the refrigerant supply source is a liquid nitrogen storage tank.
What consisted of.