JP2023041832A - air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate heatful feeling of a person who moved from a hot environment.

SOLUTION: An individual air conditioner 50 includes: a front panel 51; a rear panel 52 facing the front panel 51; a heat exchanger 55 which is provided at a cavity between the front panel 51 and the rear panel 52 and is supplied with a heat medium having a temperature which is lower or higher than an ambient temperature to conduct heat exchange between air in the cavity and the heat medium and generate radiation cold or radiation heat and convective flow; and fans 56, 57 which send the air in the cavity.

SELECTED DRAWING: Figure 3

COPYRIGHT: (C)2023,JPO&INPIT

Description

The present invention relates to air conditioners.

Patent Literatures 1 and 2 disclose an air-conditioned desk that includes a desk, a screen erected on the back side of the desk, and a heat-exchange air conditioner built in the screen. By using such a desk with an air conditioner, the area around the worker working at the desk can be individually air-conditioned by the heat exchange type air conditioner.

Patent Literature 3 discloses task ambient air conditioning. Ambient air conditioning employs a floor blowing air conditioning system, which blows out temperature-controlled air from outlets in the floor to adjust the overall temperature of the room to an appropriate temperature. A convection generation panel is used for task air conditioning. Specifically, a partition is provided around the desk to divide the individual space, and the convection generating panel is attached to the partition. The convection generating panel has a pair of upright facing plates and a heat exchanger provided between the facing plates.
During cooling, the convection panel is attached to the partition above the top plate of the desk, and a heat medium lower than room temperature is supplied to the heat exchanger of the convection panel to cool the heat exchanger and the opposing plate. Therefore, the cold radiation from the heat exchanger and the opposing plate can provide a cool feeling to the operator. Also, the air is cooled by heat exchange between the air and the heat medium between the pair of opposing plates, and descends due to the natural convection of the air. As a result, cold air floats on the top plate of the desk, providing a cool feeling to the worker. Furthermore, the top plate of the desk is also cooled, and the secondary cold radiation from the top plate can provide a cool feeling to the worker.
During heating, the convection panel is attached to the partition below the desk top, and a heat medium having a temperature higher than room temperature is supplied to the heat exchanger of the convection panel to heat the heat exchanger and the opposing plate. As a result, warm air drifts under the top plate of the desk, and further warm radiation from the heat exchanger and the opposing plate can give a warm feeling to the worker.

JP 2016-205713 A JP 2016-205719 A Japanese Patent No. 5396248

By the way, when a person moves from a hot environment to a cooling environment of task/ambient air conditioning, it takes a long time to feel cool until the person's crude heat is removed. Also, until you get used to the cooling environment of the task/ambient air conditioning, you may feel the heat. In order to cope with that, even if you look up at the fan and get a cool feeling, it will interfere with the work. Moreover, even if a cooling effect is obtained by using a special heat removal device such as a cool shower before moving to a cooling environment, the installation cost of the heat removal device increases.

Therefore, the present invention has been made in view of the above circumstances, and the problem to be solved by the present invention is to immediately eliminate the feeling of heat in a person who has moved from a hot environment.

In order to solve the above problems, an air conditioner is provided with a front panel, a rear panel facing the front panel, and a cavity between the front panel and the rear panel, and is provided with heat having a temperature lower or higher than the ambient temperature. A heat exchanger that exchanges heat between the air in the cavity and the heat medium and generates radiant cold heat or radiant heat and natural convection by supplying a medium, and a fan that blows the air in the cavity. And prepare.

According to the above, when the heat medium having a temperature lower than the ambient temperature is supplied to the heat exchanger, the air conditioner can be used as a cooling device. In that case, radiant cold heat is generated from the heat exchanger, and a person near the air conditioner can feel cool. Furthermore, since the air in the cavity between the front panel and the rear panel is cooled and naturally descends, people near the air conditioner can feel cool due to natural convection.
Also, since the air in the cavity is blown by the fan, the airflow is blown out from the cavity. When a person who has moved from a hot environment is exposed to the air current, it is cooled rapidly and feels cool. Therefore, the person's hot feeling is quickly eliminated.

On the other hand, when a heat medium having a temperature higher than the ambient temperature is supplied to the heat exchanger, the air conditioner can be used as a heater. In that case, since radiant heat is generated from the heat exchanger, a person near the air conditioner can feel warmth. Furthermore, since the air in the cavity between the front panel and the rear panel is heated and naturally rises, a person near the air conditioner can feel warmth.
In addition, it can be expected that a person who feels the heat in the heating environment will be relieved of the heat by being exposed to the airflow of the fan blowing out from the cavity.

Preferably, the fan is provided on the front panel and blows the air in the cavity forward.

According to the above, when a person who has moved from a hot environment is in front of the front panel, he or she is exposed to the airflow of the fan, so that the person's feeling of heat is immediately relieved.
On the other hand, if a person who feels the heat in the heating environment is in front of the front panel, the heat is relieved by the air flow of the fan.

Preferably, the fan is provided above the cavity and blows air downward into the cavity.

According to the above, when the air conditioner is used as a cooling device, the air cooled by the heat exchanger is forcibly lowered by the fan, so that a person near the air conditioner can feel cool due to forced convection. In particular, when a person who has moved from a hot environment is exposed to the airflow of the fan blowing downward from the cavity, the person's feeling of heat is immediately relieved.
On the other hand, when a person who feels the heat in the heated environment bathes in the airflow of the fan blowing downward from the cavity, the heat is relieved.

Preferably, the fan is provided at the side of the cavity, and blows air laterally into the cavity.

According to the above, when a person who has moved from a hot environment is exposed to the airflow of the fan blowing out from the cavity, the person's feeling of heat is immediately relieved.
On the other hand, when a person who feels the heat in the heated environment bathes in the airflow of the fan blowing out from the cavity, the heat is relieved.

Preferably, the fan is provided in the lower part of the cavity, and the fan blows the air in the cavity downward.

According to the above, when the air conditioner is used as a cooling device, the air cooled by the heat exchanger is forcibly lowered by the fan, so that a person near the air conditioner can feel cool due to forced convection. In particular, when a person who has moved from a hot environment is exposed to the airflow of the fan blowing downward from the cavity, the person's feeling of heat is immediately relieved.
On the other hand, when a person who feels the heat in the heated environment bathes in the airflow of the fan blowing downward from the cavity, the heat is relieved.

Preferably, the front panel, the rear panel, the heat exchanger and the fan are arranged above or below the desk top.

According to the above, when the front panel, the rear panel, the heat exchanger and the fan are arranged above and away from the desk top, when a heat medium lower than the ambient temperature is supplied to the heat exchanger, the inside of the cavity The air cools and naturally descends. Since the cold air floats on the top of the desk, the person working at the desk can feel cool.
If the front panel, the rear panel, the heat exchanger and the fan are placed below the desk top, the air in the cavity will be warmed if a heat transfer medium with a temperature higher than the ambient temperature is supplied to the heat exchanger. rise naturally. Since the warmth floats under the top plate of the desk, the person working at the desk can feel warmth.

According to the present invention, when a person who has moved from a hot environment is exposed to the airflow of the fan, the person's heat sensation is immediately relieved.
On the other hand, when a person who feels the heat in the heating environment is exposed to the airflow of the fan, the person's heat is alleviated.

1 is a cross-sectional view of a floor of a building; FIG. Fig. 3 is a perspective view of furniture and individual air conditioners installed in an office; It is a perspective view of an individual air conditioner. It is a perspective view of the individual air conditioner of 2nd Embodiment. It is a perspective view of the individual air conditioner of the modification of 2nd Embodiment. It is a perspective view of the individual air conditioner of 3rd Embodiment.

[First Embodiment]
1. Indoor Task-Ambient Air Conditioning FIG. 1 is a cross-sectional view of a floor of a building. This floor is provided between a lower slab 11 and an upper slab 12, a floor panel 13 is laid above the lower slab 11, and an underfloor is provided between the lower slab 11 and the floor panel 13. A space 15 is formed. A ceiling panel 14 is installed below the upper slab 12 , and a ceiling space 16 is formed between the upper slab 12 and the ceiling panel 14 . A space between the floor panel 13 and the ceiling panel 14 is partitioned into an office room 17 and a machine room 19 by a wall panel 18 erected on the lower slab 11 . The floor panel 13 is provided with an air outlet 13a for communicating between the office 17 and the underfloor space 15. - 特許庁The ceiling panel 14 is provided with a suction port 14a that allows the office 17 and the ceiling space 16 to communicate with each other.

Task ambient air conditioning is performed in the office 17 . Ambient air conditioning refers to air conditioning that adjusts the overall temperature of the office 17, and task air conditioning refers to air conditioning that adjusts the temperature around the worker. Ambient air conditioning is performed by the air conditioner 20 , and task air conditioning is performed by the individual air conditioning equipment 50 and the temperature control equipment 70 .

2. Ambient air conditioning An air conditioner 20 for ambient air conditioning in the office 17 is installed in the machine room 19 . A duct 22 is arranged from the air conditioner 20 to the ceiling space 16, and a duct 21 is arranged from the air conditioner 20 to the underfloor space 15. - 特許庁The air conditioner 20 includes an indoor unit, a ventilation device, and the like. The air conditioner 20 draws in air from inside the office 17 through the suction port 14a, the ceiling space 16, and the duct 22, air-conditions the air, and then blows the conditioned air into the office 17 through the duct 21, the underfloor space 15, and the outlet 13a. Blow out to As a result, the office 17 is adjusted to an appropriate temperature and humidity as a whole.

Also, the air conditioner 20 draws in indoor air from inside the office 17 through the suction port 14a, the ceiling space 16, and the duct 22, and discharges the indoor air to the outside. Furthermore, the air conditioner 20 sucks outside air from the outdoors, exchanges heat between the outside air and the indoor air, and blows the outside air into the office 17 through the duct 21, the underfloor space 15, and the outlet 13a. Thereby, the inside of the office 17 and the outside are ventilated.

3. Task Air Conditioning FIG. 2 is a perspective view of furniture and individual air conditioning equipment 50 installed in the office 17 . As shown in FIGS. 1 and 2, a plurality of work desks 30 are installed in the office 17 . A screen 41 is erected between the work desks 30 whose back sides are butted against each other, and a screen 42 is erected between the work desks 30 adjacent to each other on the left and right.

The work desk 30 has a top plate 31 and legs 32 . The leg portion 32 hangs down from the top plate 31 and stands on the floor panel 13 , and the top plate 31 is supported by the leg portion 32 . A rectangular plate made of wood, metal, glass, or the like is used for the top plate 31 . The width of the top plate 31 is determined to be approximately the same as the width (the length in the left-right direction) of the screen 41, and the depth of the top plate 31 is determined to be approximately the same as the width (the length in the front-rear direction) of the screen 42. A worker sits on a chair in front of the work desk 30 and works on the work desk 30, and task air conditioning is performed around the worker by the panel-type individual air conditioner 50. - 特許庁The individual air conditioner 50 is a radiant and convective air conditioner.

The individual air conditioner 50 is installed at a position above or below the top plate 31 on the back side of the top plate 31 of each work desk 30 . Specifically, the individual air conditioning equipment 50 is detachable from the screen 41, and when the individual air conditioning equipment 50 is used as an air conditioner, the individual air conditioning equipment 50 is positioned above the top plate 31 as indicated by the solid line. , and the individual air conditioner 50 individually cools the top plate 31 of the work desk 30 and its surroundings. On the other hand, when the individual air conditioning equipment 50 is used as a heater, the individual air conditioning equipment 50 is installed under the top plate 31 by being hung on the screen 41 as indicated by the two-dot chain line, and the individual air conditioning equipment 50 is placed on the work desk. The area under and around the top plate 31 of 30 is individually heated.
Note that the individual air conditioning equipment 50 may be installed above the top plate 31 by being supported by legs that stand up on the top plate 31, or the individual air conditioning equipment 50 may be installed on the top plate 31 by hanging materials. It may be installed by hanging from

The individual air conditioner 50 will be described in detail with reference to FIG. FIG. 3 is a perspective view of the individual air conditioner 50. As shown in FIG. In FIG. 3 , a part of the front panel 51 of the individual air conditioner 50 is cut away to show the inside of the individual air conditioner 50 .

The individual air conditioner 50 includes a front panel 51, a rear panel 52, side panels 53 and 54, a heat exchanger 55, fans 56 and 57, a flexible supply pipe 61, a flexible return pipe 62 and a coupler 63 (see FIG. 2). Prepare.

A front panel 51, a rear panel 52, and side panels 53 and 54 are assembled into a thin rectangular tubular shape with top and bottom openings. The front panel 51 and the rear panel 52 face each other in the front-rear direction with a space therebetween, and the side panels 53 and 54 face each other in the left-right direction with a space therebetween. A filter such as a punching plate or wire mesh may be provided in the upper opening or the lower opening of the cavity surrounded by the panels 51 to 54, or in both of them.

Air outlets are formed in the right and left portions of the front panel 51, and fans 56 and 57 are provided at the outlets. The fans 56 and 57 are covered with a perforated plate such as a punching plate or wire mesh and protected by the perforated plate. The fans 56 and 57 are axial fans such as propeller fans, and blow air forward in the cavity surrounded by the panels 51-54. Fans 56 and 57 may be centrifugal fans, cross-flow fans, or cross-flow fans.

A heat exchanger 55 is housed in the cavity enclosed by the panels 51-54. The heat exchanger 55 has a heat medium pipe 55a and heat transfer fins 55b for heat release or heat absorption attached to the outer surface of the heat medium pipe 55a.

The heat medium pipe 55a is made of a heat transfer tube material with high thermal conductivity such as metal. The heat medium pipe 55a is laid in a zigzag shape so that the left and right portions of the cavity surrounded by the panels 51-54 are folded back. Fans 56 and 57 are arranged in front of the folded portion of the heat medium pipe 55a.

The heat transfer fins 55b are made of a coil material formed by spirally winding a wire with high thermal conductivity, and are further spirally wound around the heat medium pipe 55a while maintaining the spiral coil shape. . The heat transfer fins 55b may be attached to the entire outer surface of the heat medium pipe 55a, or may be attached to the entire portion of the heat medium pipe 55a other than the left and right folded portions. The heat transfer fins 55b are surface area enlarged portions that increase the surface area in contact with the air to improve the efficiency of heat radiation or heat absorption.

One end of a flexible feed pipe 61 is connected to one end of the heat medium pipe 55a, and one end of a flexible return pipe 62 is connected to the other end of the heat medium pipe 55a. As shown in FIG. 2, a coupler 63 is attached to the other ends of the flexible supply pipe 61 and the flexible return pipe 62 . When the coupler 63 is connected to the coupler provided on the floor panel 13 , the flexible feed pipe 61 is connected to the underfloor feed pipe 71 , and the flexible return pipe 62 is connected to the underfloor return pipe 72 . As shown in FIG. 1, one ends of the forward pipe 71 and the return pipe 72 are connected to each other and run in the underfloor space 15, and the other ends are connected to the temperature control device 70 in the machine room 19. . The temperature control device 70 adjusts a heat medium such as water to a predetermined temperature, sends the temperature-controlled heat medium to the feed pipe 71, and receives the heat medium from the return pipe 72 to circulate the heat medium. Here, when the individual air conditioner 50 is used as a cooler, the temperature control device 70 controls the temperature of the heat medium to be lower than the temperature in the office 17, for example, 15°C. On the other hand, when the individual air conditioner 50 is used as a heater, the temperature control device 70 controls the temperature of the heat medium to be higher than the temperature in the office 17, eg, 44 to 45.degree.

4. Cooling During cooling, ambient cooling and task cooling are combined by operating the air conditioner 20 for cooling and the temperature control device 70 for low temperature operation. During cooling, the individual air conditioner 50 is hung on the screen 41 above the top plate 31 .

When the air conditioner 20 is in cooling operation, cold air is blown out from the outlet 13a. As a result, the office 17 is cooled to the set temperature.

When the temperature control device 70 is operated at a low temperature, the temperature control device 70 controls the temperature of the heat medium to be lower than the room temperature of the office 17 and circulates between the temperature control device 70 and the heat exchanger 55 . The heat medium supplied to the heat exchanger 55 cools the heat exchanger 55 to a temperature lower than the surrounding room temperature, and eventually the front panel 51, the rear panel 52, and the side panels 53 and 54 are also cooled to a temperature lower than the surrounding room temperature. Then, radiant cold heat is generated from the heat exchanger 55 and the panels 51 to 54, and the cool radiation from the heat exchanger 55 and the panels 51 to 54 can provide a cool feeling to the worker working on the work desk 30.

In addition, the heat exchanger 55 exchanges heat between the heat medium in the heat exchanger 55 and the air outside the heat exchanger 55, and cool air descends due to natural convection. The descending cold air spreads along the surface of the top plate 31 and floats on the top plate 31. - 特許庁Such cold air and its flow can provide a cool feeling to the worker working on the work desk 30 . Here, since the heat exchanger 55 is surrounded by the panels 51-54, the natural downward flow of cold air is not affected by disturbance.

The top plate 31 is also cooled by the cold radiation from the heat exchanger 55 and the panels 51 to 54 and the cool air on the top plate 31 . As a result, secondary cold radiation from the top plate 31 can provide a cool feeling to the worker working on the work desk 30 .

By the way, even if a person who has moved into the office 17 from a hot environment is exposed to ambient cooling by the air conditioner 20 or task cooling by the individual air conditioner 50, until the person's rough heat is removed, The person feels the heat. However, in this embodiment, the cool feeling can be obtained by bathing in the air currents generated by the fans 56 and 57 . In addition, the person's rough heat is quickly removed by the air currents from the fans 56 and 57 . Therefore, the person's hot feeling is quickly eliminated.

Moreover, since the fans 56 and 57 blow air forward, the air current hits the head, neck, or chest of the operator, and the operator can easily feel cool.

In addition, since the fans 56 and 57 are provided in front of the left and right folded portions of the heat medium pipe 55a, the airflow of the fans 56 and 57 hardly affects the natural downward flow of cold air, and the flow of cold air is hardly disturbed. does not occur. However, the cold air cooled by the heat exchanger 55 may be blown toward the worker by the fans 56 and 57 .

Incidentally, the fans 56 and 57 may be energized and deenergized by a sensor or a switch (switch). Examples using sensors or switches are given below.

(1) Switches for turning on/off the fans 56 and 57 are provided on the work desk 30, the panels 51 to 54 or the screens 41 and 42. When the worker feels hot, the fans 56 and 57 are operated by turning on the switch. On the other hand, when the worker has eliminated the heat, the fans 56 and 57 are stopped by turning off the switch.

(2) A non-contact type or contact type motion sensor is provided on the work desk 30, the screens 41 and 42, or the panels 51 to 54 or their surroundings. When the human sensor detects an operator, the control circuit operates the fans 56 and 57 . After that, the control circuit stops the fans 56 and 57 when the control circuit counts a predetermined time from the detection of the operator. The control circuit may stop the fans 56 and 57 when the operator is no longer detected by the human sensor.

(3) A personal computer installed on or around the work desk 30 is provided with a sensor for detecting whether the personal computer is turned on or off. When the power of the personal computer is detected by the sensor, the control circuit operates the fans 56 and 57 . After that, the control circuit stops the fans 56 and 57 when the control circuit counts a predetermined time from the time when the personal computer is turned on. The control circuit may stop the fans 56 and 57 when the sensor detects that the personal computer is turned off.

(4) A load sensor is provided on the chair paired with the work desk 30, and the load detected by the load sensor is compared with a predetermined threshold value by the control circuit. When the worker sits on the chair, the load detected by the seating sensor exceeds a predetermined threshold, so the control circuit operates the fans 56 and 57 . After that, the control circuit stops the fans 56 and 57 when the control circuit counts a predetermined time from when the fans 56 and 57 are activated. Note that the control circuit may stop the fans 56 and 57 when the load detected by the load sensor becomes equal to or less than a predetermined threshold value due to the operator standing up.

5. Heating During heating, the air conditioner 20 is operated for heating and the temperature control device 70 is operated at a high temperature, so that both ambient heating and task heating are performed. During heating, the individual air conditioner 50 is hung on the screen 41 below the top plate 31 and used.

When the air conditioner 20 is operated for heating, warm air is blown out from the outlet 13a. As a result, the office 17 is heated to a predetermined set temperature.

When the temperature control device 70 is operated at a high temperature, the heat medium is controlled by the temperature control device 70 to a temperature higher than the room temperature of the office 17 and circulates between the temperature control device 70 and the heat exchanger 55 . The heat medium supplied to the heat exchanger 55 heats the heat exchanger 55 to a temperature higher than the surrounding room temperature, and the front panel 51, the rear panel 52, and the side panels 53 and 54 are also heated to a temperature higher than the surrounding room temperature. . Then, radiant and convective heat is generated from the heat exchanger 55 and the panels 51 to 54, and the heat radiation from the heat exchanger 55 and the panels 51 to 54 gives a feeling of warmth to the worker working on the work desk 30. can.

In addition, the heat exchanger 55 performs heat exchange between the heat medium and the air, and warm air rises due to natural convection. The rising warm air spreads on the back surface of the top plate 31 and drifts under the top plate 31. - 特許庁Such warm air and its flow can give a feeling of warmth to the worker working on the work desk 30 .

The top plate 31 is also warmed by warm radiation from the heat exchanger 55 and the panels 51 to 54 and warm air under the top plate 31 . Then, secondary heat radiation from the top plate 31 can give a feeling of warmth to the worker working on the work desk 30 .

The fans 56 and 57 are normally stopped, but when the operator feels the heat of the heating, the fans 56 and 57 are activated by turning on the switch. Then, the worker can feel cool by being exposed to the airflow by the fans 56 and 57 .

[Second embodiment]
FIG. 4 is a perspective view of an individual air conditioner 50A of the second embodiment. Each component of the individual air conditioner 50A of the second embodiment is given the same reference numeral as that of the corresponding component of the individual air conditioner 50. As shown in FIG. Further, the following mainly describes differences between the individual air conditioner 50A of the second embodiment and the individual air conditioner 50 of the first embodiment.

In the second embodiment, fans 56 and 57 such as an axial fan, a centrifugal fan, a diagonal fan, or a transverse fan are provided in the upper opening of the cavity surrounded by the panels 51 to 54, and the front panel 51 A horizontally long slit 58 is formed in the center.

When the fans 56 and 57 operate during cooling, the fans 56 and 57 blow air downward. Then, the cold air cooled by the heat exchanger 55 flows downward due to the wind pressure of the fans 56 and 57 in addition to the natural convection. The cold air that has flowed downward flows forward along the top plate 31 and is blown to the worker. Therefore, it is possible to give the worker a cool feeling.

Also, part of the cold air cooled by the heat exchanger 55 passes through the slit 58 and flows forward due to the wind pressure of the fans 56 and 57 . Therefore, the cold air is blown to the worker, so that the worker can feel cool.

The slit 58 may be provided with a shutter for opening and closing the slit 58 . When the operator manually or electrically closes the shutter, cold air does not blow out from the slits 58, but the flow rate of the downdraft of cool air increases. On the other hand, when the operator manually or electrically opens the shutter, the cold air from the slit 58 and the cold air from the downdraft are blown to the operator. Therefore, it is possible to change the blowing mode of cool air by opening and closing the shutter.

Note that the slit 58 may not be formed.

When the worker feels hot during heating, the fans 56 and 57 are operated by turning on the switch. Then, since the fans 56 and 57 blow air downward, the air flows forward along the floor panel 13 and is blown to the worker. Therefore, the worker feels cool. At this time, if the fans 56 and 57 are operated in the opposite direction, the air flows forward along the top plate 31 of the work desk 30, so that the air current can be more effectively applied.

In the example shown in FIG. 4, the fans 56 and 57 are provided in the upper opening of the cavity surrounded by the panels 51 to 54. Conversely, like the individual air conditioner 50B shown in FIG. may be provided at the lower opening of the cavity enclosed by panels 51-54. In this case, slits for blowing out cool air are not formed. Further, in this case, the fans 56 and 57 draw in cold air cooled by the heat exchanger 55 and blow it downward during cooling, so that the cold air that has flowed downward flows forward along the top plate 31 . Therefore, the worker can feel cool. On the other hand, since the fans 56 and 57 blow air downward or upward during heating, a person who feels the heat from the heating feels cool due to the airflow.

[Third Embodiment]
FIG. 6 is a perspective view of an individual air conditioner 50C of the third embodiment. Each component of the individual air conditioner 50</b>C of the third embodiment is given the same reference numeral as that of the corresponding component of the individual air conditioner 50 . In the following, differences between the individual air conditioning equipment 50C of the third embodiment and the individual air conditioning equipment 50 of the first embodiment are mainly described.

In the third embodiment, suction ports are formed in the upper portions of the side panels 53 and 54, respectively, and fans 56 and 57 such as axial fans, centrifugal fans, cross-flow fans, or cross-flow fans are provided at the respective suction ports. ing. A horizontally long slit 58 is formed in the center of the front panel 51 .

When the fans 56 and 57 operate during cooling, the fans 56 and 57 blow air toward the cavity surrounded by the panels 51-54. Then, the cold air cooled by the heat exchanger 55 is blown out from the upper opening and the lower opening of the cavity by the wind pressure of the fans 56 and 57 . Cold air blown out from the lower opening of the cavity flows forward along the top plate 31 and is blown to the worker. Therefore, it is possible to give the worker a cool feeling.

Also, part of the cold air cooled by the heat exchanger 55 passes through the slit 58 and flows forward due to the wind pressure of the fans 56 and 57 . Therefore, the cold air is blown to the worker, so that the worker can feel cool. A shutter may be provided in the slit 58 as in the case of the second embodiment.

When the worker feels hot during heating, the fans 56 and 57 are operated by turning on the switch. Then, since the fans 56 and 57 blow air toward the cavity surrounded by the panels 51 to 54, the air in the cavity is blown out from the upper opening and the lower cavity of the cavity, and the air is blown out from the back side of the top plate 31 and the floor panel. It flows forward along 13 and is sprayed on the worker's lower body. Therefore, the worker feels cool.

[Modification]
In each of the above embodiments, the installation positions of the fans 56 and 57 are the front panel 51, the side panels 53 and 54, and the cavity according to the design of the individual air conditioners 50, 50A, 50B, and 50C and the installation space of the fans 56 and 57. Upper opening or lower opening of the cavity. The design of the individual air conditioners 50, 50A, 50B, 50C, the size of the fans 56, 57, and the installation space of the fans 56, 57 may be changed, and the installation positions of the fans 56, 57 may be changed. To directly or indirectly blow the air currents of fans 56, 57 to a worker even when the design is changed.

50, 50A, 50B... Radiation type air conditioner 51... Front panel 52... Rear panel 53, 54... Side panel 55... Heat exchanger 56, 57... Fan

Claims (8)

a front panel;
a rear panel facing the front panel;
A heat medium is provided in the cavity between the front panel and the rear panel, and is supplied with a heat medium having a temperature lower or higher than the ambient temperature, thereby exchanging heat and radiating heat between the air in the cavity and the heat medium. a heat exchanger that generates cold or radiant heat and natural convection;
and a fan for blowing air outside the cavity into the cavity such that the air inside the cavity collides with the heat exchanger. 2. The air conditioner according to claim 1, wherein the fan blows air outside the cavity into the cavity such that the air in the cavity vertically collides with the heat exchanger. 3. The air conditioner according to claim 1, wherein the fan is provided on the front panel, and the fan blows air inside the cavity forward or blows air outside the cavity into the cavity. 3. The air conditioner according to claim 1, wherein the fan is provided above the cavity, and blows air downward into the cavity or upward out of the cavity. 3. The air conditioner according to claim 1, wherein the fan is provided on the side of the cavity, and blows air laterally into the cavity or laterally out of the cavity. 3. The air conditioner according to claim 1, wherein the fan is provided below the cavity, and the fan blows air inside the cavity downward or blows air outside the cavity upward. 7. The air conditioner according to any one of claims 1 to 6, further comprising a sensor or a switch for switching between operating and stopping the fan. The air conditioner according to any one of claims 1 to 7, wherein the front panel, the rear panel, the heat exchanger, and the fan are arranged above or below the desk top.

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