JP2002081688A - Ventilator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact ventilator at a low cost capable of using a cooling and heating system as for efficiently humidifying or dehumidifying and increasing the degree of freedoms of disposing components by reducing a number of components. SOLUTION: A refrigerating cycle is constituted by alternately forming an air supply route S and an exhaust route E shut off from each other by a partition wall 59 in one unit; and sequentially connecting a compressor 60, a first heat exchanger 42, a throttle unit 66 and a second heat exchanger 56. The first and second exchangers 42 and 56 are respectively mounted in the supply and exhaust routes S and E, and the compressor 60 and the throttle unit 66 are mounted out of the routes S and E. Further, the exchangers 42 and 56 are respectively operated as an evaporator and a condenser, the condenser is cooled with the indoor air, and simultaneously outdoor air is cooled by the evaporator and guided to a room.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilating apparatus for ventilating a house, particularly a highly airtight and highly insulated house. The present invention relates to a ventilator that recovers heat by performing the above-described steps.

[0002]

2. Description of the Related Art From the viewpoint of energy saving, so-called "highly airtight and highly insulated houses" are widely used especially in cold regions from the viewpoint of energy saving. In recent years, there is a trend to adopt highly airtight and highly insulated houses even in warm areas due to energy.

[0003] The air-conditioning and heating system of this highly airtight and highly insulated house includes:
There are an air conditioner and hot water heating (cold area), and a ventilation system includes an exhaust system, an air supply system, a supply and exhaust system, and the like.

In the exhaust system, an air supply port is provided in each room,
Dirty air is intensively exhausted from a return air port provided in a corridor, a washroom, or the like, through a duct connected to a unit with a built-in fan. This system is simple and inexpensive, but it is hot in summer and cold in winter because the outside air enters through the ventilation holes of each room. Further, since there is no heat exchange between the incoming outside air and the air discharged to the outside and no heat recovery, heat loss occurs due to ventilation.

[0005] In the air supply system, a unit equipped with a fan pushes in outside air and forcibly exhausts air from a gap in the house. Since there is no heat exchange between them, heat loss occurs.

On the other hand, in the air supply / exhaust system in which the exhaust system and the air supply system are combined, air is supplied to each room and exhausted from each room through ducts connected to the unit. By performing heat exchange with the exhaust gas, the heat recovery rate is improved.

[0007] Further, in order to add an air-conditioning capability to the air supply / exhaust system, a system in which a heat exchanger, a compressor and the like are connected to form a refrigeration cycle has been proposed.

FIG. 7 shows a dehumidifying unit having an air-conditioning and ventilation function disclosed in Japanese Patent Application Laid-Open No. Hei 6-123444, in which an air-conditioning and ventilation element 2 is arranged in the same unit, and an air supply path and an exhaust path are defined. Make up. Further, the use-side heat exchanger 4 is arranged on the secondary side of the air-conditioning and ventilation element 2 in the air supply path, and the heat source-side heat exchanger 6 is arranged on the secondary side of the air-conditioning and ventilation element 2 in the exhaust path. A refrigeration cycle is constituted by sequentially connecting the exchangers 4 and 6 to a compressor, a four-way valve and the like. In the drawing, 8, 10, 12, and 14 indicate an outdoor suction port, an outdoor air outlet, an indoor air outlet, and an indoor air inlet, respectively, and 16, 18, and 20.
Indicates an indoor blower fan, an outdoor blower fan, and a compressor, respectively.

At the time of cooling, the use side heat exchanger 4 functions as an evaporator, and the outside air introduced from the outdoor is
The heat is exchanged with the inside air discharged from the room at the same time, and the temperature is reduced and guided to the evaporator, cooled and dehumidified and supplied to the room. At this time, the heat source side heat exchanger functions as a condenser, and is cooled by the inside air whose temperature is slightly increased by heat exchange in the air conditioning and ventilation element 2 (= radiation). During heating, the use-side heat exchanger functions as a condenser, and the outside air introduced from the outside exchanges heat with the air-conditioning and ventilation element 2, and the temperature rises and is guided to the condenser, heated and supplied to the room. Is done. At this time, the heat-source-side heat exchanger functions as an evaporator, and is heated by the inside air whose temperature is slightly lowered by heat exchange in the air-conditioning ventilation element 2 (= heat recovery).

[0010]

However, in the unit having the above-mentioned structure, the air-conditioning and ventilation element 2 is once supplied in order to supply the outdoor air to the room at the same temperature as the room air so as not to disturb the indoor thermal environment. After performing the heat exchange in step (2), cooling or heating is performed twice in the use side heat exchanger, and the number of parts is large. Further, when the indoor air is discharged outside, the heat is exchanged by the air conditioning and ventilation element 2 and then passed through the heat source side heat exchanger, so that the heat radiation effect is reduced in the case of heat radiation and the heat absorption effect is reduced in the case of heat absorption. Let me. Furthermore, since the air conditioning ventilation element 2 and the heat exchanger requiring condensed water treatment are used in combination, the air supply path and the exhaust path must be arranged on substantially the same plane. Therefore, for example, a configuration in which the exhaust path is located at the upper part and the supply path is located at the lower part cannot be taken, and there is a problem that the degree of freedom in arranging parts is small and the main body becomes large.

The present invention has been made in view of the above-mentioned problems of the prior art, and can be used as a cooling and heating device capable of efficiently humidifying or dehumidifying. It is an object of the present invention to provide a compact and inexpensive ventilator with an increased degree of freedom in arrangement.

[0012]

According to one aspect of the present invention, there is provided an air supply path for supplying outdoor air to a room in one unit; The refrigeration cycle is formed by forming the supply path and an exhaust path cut off by the partition wall and discharging the indoor air to the outside, and sequentially connecting the compressor, the first heat exchanger, the expansion device, and the second heat exchanger. And mounting the first and second heat exchangers in the supply and exhaust paths, respectively, while mounting the compressor and the expansion device outside the supply and exhaust paths, and the first and second heat exchangers. The two heat exchangers are operated as an evaporator and a condenser, respectively, so that the condenser is cooled by the indoor air and the outdoor air is cooled by the evaporator and guided to the room.

According to a second aspect of the present invention, a four-way valve is provided in the refrigeration cycle outside the supply and exhaust paths, and the four-way valve is switched to condense the first and second heat exchangers, respectively. The evaporator is operated as an evaporator and an evaporator. At the same time, the evaporator is heated by the indoor air, and the outdoor air is heated by the condenser to be guided into the room.

Further, in the invention according to claim 3, a third heat exchanger operating as a condenser is provided in the refrigeration cycle, and the compressor, the four-way valve, and the third heat exchanger are combined with the unit. Is attached to another second unit.

Further, the invention according to claim 4 is characterized in that a third heat exchanger operating as a condenser is arranged downstream of the first heat exchanger.

Further, the invention according to claim 5 is characterized in that the moisture in the exhaust gas from the room condensed in the second heat exchanger operating as an evaporator operates as a condenser in the air supply path. It is characterized by being led to one heat exchanger, evaporated and returned to the room.

According to a sixth aspect of the present invention, the second heat exchanger is arranged at a higher position than the first heat exchanger, and the water condensed in the second heat exchanger is weighed by its own weight. And leading to the first heat exchanger.

Further, according to the present invention, a humidifying plate is provided downstream of the first heat exchanger which operates as a condenser in the air supply path, and the second humidifying plate operates as an evaporator. The moisture in the exhaust gas from the room condensed by the heat exchanger is guided to the humidifying plate, and is evaporated to return to the room.

Further, according to the present invention, an air supply path for supplying outdoor air to a room is provided in one unit;
An exhaust path for discharging indoor air to the outside is formed, and a desiccant element that rotates orthogonally to the supply and exhaust paths is provided, and a compressor, a first heat exchanger, a throttle device, and a second heat exchange The first heat exchanger is disposed upstream of the desiccant element in the air supply path, and a heating device is connected to the desiccant element in the exhaust path. While arranged upstream,
The compressor and the expansion device are mounted outside the supply and exhaust paths, and the first heat exchanger is operated as an evaporator to cool and dehumidify the outdoor air by the evaporator. The air is further dehumidified by the desiccant element and introduced into the room, and the moisture adsorbed by the desiccant element is released by the heating device.

According to a ninth aspect of the present invention, the second heat exchanger is arranged upstream of the heating device to operate as a condenser.

According to a tenth aspect of the present invention, a four-way valve is provided in the refrigeration cycle outside the air supply and exhaust paths.
The air introduced into the room is dehumidified or humidified by switching the four-way valve.

[0022]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a ventilation device M1 according to a first embodiment of the present invention, in which a substantially rectangular parallelepiped main body 30 has an outside air (outdoor air) intake port 32, an outside air supply port 34 to a room, and inside air (indoor air). , An exhaust port 38 for venting the inside air to the outside, and the like. Although one (small capacity) ventilator M1 can be provided in each room, it is possible to simultaneously ventilate all rooms (all buildings) by branching the duct connected to the air supply port 34 into a plurality. Can be.

Referring to FIG. 2, when the ventilation device M1 is viewed from the flow of air, a dust collection filter 40 is provided immediately downstream of the outside air suction port 32 in the air supply path S for supplying outside air from the outside to the room. And a heat exchanger 4 downstream thereof.
2. A heat exchanger 44 and a humidifying plate 46 are provided adjacent to each other, and a water receiving tray 48 is attached below the heat exchanger 42, the heat exchanger 44 and the humidifying plate 46. Further, an air supply fan 50 is provided further downstream of the humidifying plate 46, and the air supply port 34 is located downstream of the air supply fan 50. The humidifying plate 46 is, for example, a water-absorbing resin plate.

On the other hand, an exhaust path E for discharging inside air from the room to the outside of the room has a dust collecting filter 5 immediately downstream of the return air port 36.
2, and an exhaust fan 54 is provided on the downstream side. The heat exchanger 5 is located downstream of the exhaust fan 54.
6 is provided, and the exhaust port 38 is located downstream of the heat exchanger 56. Further, a water receiving tray 58 is attached below the heat exchanger 56.

As shown in FIG. 2, the exhaust path E
Is located above the air supply path S, and since the exhaust path E and the air supply path S are blocked by the continuous partition wall 59, the exhaust air from the room passing through the exhaust path E and the air supply path S No substantial heat exchange takes place with the supply of air into the room passing through.

Next, referring to FIG. 3, when the ventilation device M1 is viewed from the flow of the refrigerant (at the time of cooling), the compressor 60, the four-way valve 6
2. The heat exchanger 44, the check valve 64, the heat exchanger 56, the expansion device 66, and the heat exchanger 42 are connected in series.
A check valve 68 is provided in parallel with the heat exchanger 44 and the check valve 64.
Is connected.

Next, the ventilation / cooling (dehumidification) operation in the summer or the intermediate period of the ventilation device M1 having the above configuration will be described with reference to FIG.

During the cooling operation, the refrigerant discharged from the compressor 60 passes through the four-way valve 62, the heat exchanger 44 operating as an auxiliary condenser and the check valve 64, and the heat exchanger 56 operating as a main condenser. , Where it exchanges heat with the air discharged from the room to condense and liquefy. Thereafter, the refrigerant is supplied to the expansion device 6.
6, the pressure is reduced and the state is liable to evaporate, flows to the heat exchanger 42 which operates as an evaporator, evaporates, passes through the four-way valve 62, and is sucked into the compressor 60 again.

At this time, the ventilation device M1
The outside air sucked in is first passed through a dust filter 40 to remove dust and dirt in the air, and further cooled and dehumidified by passing through a heat exchanger 42 as an evaporator.
The cooled and dehumidified air is supplied to a heat exchanger 4 as an auxiliary condenser.
After being slightly warmed by 4, the air is guided into the room by the air supply fan 50 through the air supply port 34. The water condensed in the evaporator (heat exchanger 42) is collected in the water tray 48.

On the other hand, the indoor air is guided to the ventilator M1 from the return air port 36, passes through the dust collecting filter 52 to remove dust and dirt in the air, and is further discharged by the exhaust fan 54 as a main condenser. After the heat is exchanged with the refrigerant and the temperature rises, the heat is discharged to the outside through the exhaust port 38.

Next, the ventilation / heating operation in winter will be described with reference to FIG.

During the heating operation, the high-temperature and high-pressure refrigerant discharged from the compressor 60 passes through the four-way valve 62, flows to the heat exchanger 42 as a condenser, and exchanges heat with outside air to be condensed and liquefied. After that, the refrigerant is reduced in pressure by passing through the expansion device 66 and easily vaporized. After flowing into the heat exchanger 56 that operates as an evaporator and evaporating, the refrigerant passes through the four-way valve 62 and is again transmitted to the compressor 60. Inhaled.

At this time, the ventilation device M1
The outside air sucked into the filter first passes through the dust collection filter 40 to remove dust, dirt, and the like in the air, and further, performs heat exchange with the refrigerant in the heat exchanger 42 as a condenser to increase the temperature.
The air whose temperature has risen is humidified by passing through the humidifying plate 46, and is guided into the room by the air supply fan 50 through the air supply port 34.

On the other hand, the indoor air is guided to the ventilator M1 through the return air port 36, passes through the dust filter 52, and removes dust and dirt in the air. The air is further sent to a heat exchanger 56 as an evaporator by an exhaust fan 54, exchanges heat with the refrigerant to lower the temperature, and is discharged from the exhaust port 38 to the outside. The water condensed in the evaporator (heat exchanger 56) is collected in the water tray 58. Water tray 5
The water collected in 8 is led to a condenser (heat exchanger 42) or a humidifying plate 46 in the air supply path S by a pipe, a hose, or the like (not shown), and is used for humidifying the sucked outside air. In the configuration shown in FIG. 2, since the exhaust path E is located above the air supply path S, the water collected in the water receiving tray 58 can be guided to the air supply path S by its own weight.

In the above embodiment, all the components such as the heat exchangers 42, 44, 56 and the compressor 60 are housed in the main body 30, and are housed as one unit in a house closet, a storage room, or the like. However, in order to reduce noise, the heat exchanger 44, the compressor 60, the four-way valve 6
2. The check valves 64, 68 and the like may be arranged outside the room and connected to the main body 30 by a refrigerant pipe as a separate unit from the main body 30.

The provision of the heat exchanger 44 as a reheater improves the comfort during cooling. However, it is not always necessary to provide the heat exchanger 44. If the heat exchanger 44 is not provided, the two check valves 64 and 64 are provided. 68 can also be omitted. In this case, comfort is somewhat reduced, but energy is saved because the cooled air is supplied to the room without warming.

Further, the four-way valve 62 can be omitted. In this case, the ventilation device M1 is used as a ventilation / auxiliary cooling device in summer or an intermediate period, or as a ventilation device in winter.

In the above embodiment, the exhaust path E is arranged above the air supply path S. However, the present invention is not limited to this arrangement, and the exhaust path E and the air supply path S are arranged at the same level. Other configurations and other arrangements are possible.

FIG. 6 shows a ventilating apparatus M2 according to a second embodiment of the present invention. An outside air intake port 32, an air supply port 34, a return air port 36, and an exhaust port 38 are provided in the same main body as in FIG. Is provided.

Looking at the ventilation device M2 from the flow of air, the dust collection filter 40 is provided immediately downstream of the outside air suction port 32 in the air supply path S for supplying outside air from outside to the room, and further downstream thereof. Is provided with a heat exchanger 42. A water tray 48 is attached below the heat exchanger 42. A heating device 71 such as a heater is provided downstream of the heat exchanger 42, and a desiccant (drying agent) element 70 is provided downstream thereof. Further, an air supply fan 50 is provided downstream of the desiccant element 70, and the air supply port 34 is located downstream of the air supply fan 50.

On the other hand, an exhaust path E for discharging inside air from the room to the outside of the room has a dust collection filter 5 immediately downstream of the return air port 36.
2, and an exhaust fan 54 is provided on the downstream side. The heat exchanger 5 is located downstream of the exhaust fan 54.
6, and a water receiving tray 58 is attached below the heat exchanger 56. Further, a heating device 72 such as a heater is provided on the downstream side of the heat exchanger 56, and a desiccant element 70 is further disposed on the downstream side, and the exhaust port 38 is located on the downstream side.

As shown in FIG. 6, as the desiccant element 70, for example, a partition wall 59 that cuts off the air supply path S and the exhaust path E is penetrated, and the air supply path S and the exhaust path E are rotated orthogonally. A desiccant rotor is used.

The refrigeration cycle of the ventilator M2 is not provided with the heat exchanger 44 and the check valves 64 and 68 shown in FIG. 3, but the other configuration is the same, and the description is omitted.

Next, the flow of air during the ventilation / cooling (dehumidification) operation of the above-configured ventilator M2 in the summer or in the intermediate period will be described.

The outside air sucked into the ventilator M2 from the outside air suction port 32 first passes through the dust filter 40 to remove dust and dirt in the air, and further passes through the heat exchanger 42 as an evaporator. As a result, cooling and dehumidification are achieved. The cooled and dehumidified low-temperature and high-humidity air (relative humidity） 100%) is further dehumidified by the desiccant element 70, and then guided indoors by the air supply fan 50 through the air supply port 34. The water condensed in the evaporator (heat exchanger 42) is collected in the water tray 48. At this time, the heating device 71 is in the OFF state.

On the other hand, the indoor air is guided from the return air port 36 to the ventilator M 2, passes through the dust collecting filter 52 to remove dust and dirt from the air, and is further exhausted by the exhaust fan 54 as a condenser. It is sent to the heat exchanger 56 and exchanges heat with the refrigerant to increase the temperature. The temperature-raised air is further heated by the heating device 72, absorbs moisture adsorbed on the desiccant element 70 through the air supply path S, and discharges the exhaust port 3 in a wet state.
8 to the outside.

Next, the flow of air during the ventilation / heating operation in winter will be described.

The outside air sucked into the ventilator M2 from the outside air suction port 32 first passes through a dust filter 40 to remove dust and dirt from the air, and further, the refrigerant and a refrigerant in a heat exchanger 42 as a condenser. The temperature rises due to heat exchange. The air whose temperature has risen is further heated by the heating device 71, absorbs the moisture adsorbed by the desiccant element 70 in the exhaust path E (humidifies), and enters the room through the air supply port 34 by the air supply fan 50. Be guided.

On the other hand, the indoor air is guided to the ventilator M2 from the return air port 36, passes through the dust filter 52, and removes dust and dirt in the air. This air is further sent to a heat exchanger 56 as an evaporator by an exhaust fan 54 to be cooled and dehumidified. The cooled and dehumidified low-humidity air is further dehumidified by the desiccant element 70,
The air is discharged from the exhaust port 38 to the outside. The heating device 72
Is in the OFF state at this time.

Ventilation apparatus M2 according to the second embodiment
Has the following advantages by using the refrigeration cycle and the desiccant element 70 together. (1) Non-water supply humidification and dehumidification become possible. (2) The moisture absorption performance of the desiccant element is improved by combining with the refrigeration cycle.

[0051]

Since the present invention is configured as described above, it has the following effects.

According to the first aspect of the present invention, the air supply path and the exhaust path which are separated from each other by the partition are formed, and the first and second heat exchanges constituting the refrigeration cycle are formed. Since the condenser is operated as an evaporator and a condenser, respectively, the condenser is cooled by the indoor air, and the outdoor air is cooled by the evaporator and guided into the room, so that heat is directly exchanged between supply and exhaust. Instead, heat exchange is performed via the refrigeration cycle. Therefore, a heat exchanger for exchanging heat between supply and exhaust is not required, and the number of components is reduced, so that the degree of freedom in component arrangement is increased. Further, the ventilation device used as the auxiliary cooling device can be made compact and inexpensive.

According to the second aspect of the present invention, when the four-way valve is switched to operate the first and second heat exchangers as a condenser and an evaporator, respectively, and the evaporator is heated with room air. At the same time, since the outdoor air is heated by the condenser and guided into the room, the ventilation device can be used as an auxiliary heating device.

According to the third aspect of the present invention,
Since the compressor, the four-way valve, and the third heat exchanger that operates as a condenser are mounted on a separate unit, noise can be reduced by disposing the separate unit, for example, outdoors.

According to the fourth aspect of the present invention, the third heat exchanger operating as a condenser is arranged downstream of the first heat exchanger, so that the first heat exchange during cooling can be performed. The air cooled in the vessel is heated somewhat in the third heat exchanger, and comfort is improved.

According to the fifth aspect of the present invention, the moisture in the exhaust gas from the room condensed by the second heat exchanger operating as an evaporator is used as the first heat exchanger operating as a condenser. And evaporate it back to the room, so that the room can be efficiently humidified.

According to the sixth aspect of the present invention, the water condensed in the second heat exchanger is guided to the first heat exchanger by its own weight, so that a device such as a pump is used. Water can be supplied only with pipes and hoses.

According to the seventh aspect of the invention, the moisture in the exhaust air from the room condensed by the second heat exchanger operating as an evaporator is guided to the humidifying plate, and is evaporated and returned to the room. Therefore, the room can be efficiently humidified.

Further, according to the eighth aspect of the present invention,
A desiccant element that rotates orthogonally to the air supply and exhaust paths is provided, a first heat exchanger that constitutes a refrigeration cycle is disposed upstream of the desiccant element in the air supply path, and a heating device is connected to the exhaust path. Disposed upstream of the desiccant element in the inside, the first heat exchanger is operated as an evaporator to cool and dehumidify the outdoor air, and this air is further dehumidified by the desiccant element and guided into the room, and the desiccant element Since the moisture adsorbed in the step (1) is released by the heating device, it is possible to provide a ventilation device that can efficiently perform indoor dehumidification and can be used as an auxiliary cooling device.

According to the ninth aspect of the present invention, the second heat exchanger is disposed upstream of the heating device and operates as a condenser, so that the indoor air is supplied to the second heat exchanger. Water heated by the heat exchanger and adsorbed by the desiccant element can be efficiently released.

According to the tenth aspect of the present invention,
Since the air introduced into the room is dehumidified or humidified by switching the four-way valve, it is possible to provide a ventilation device that can be used as a cooling and heating device and can perform humidification and dehumidification without water supply.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a ventilation device according to a first embodiment of the present invention.

FIG. 2 is a schematic longitudinal sectional view of the ventilation device of FIG.

FIG. 3 is a piping diagram of a refrigeration cycle provided in the ventilator of FIG. 1;

FIG. 4 is a schematic diagram illustrating flows of air and a refrigerant during a cooling operation of the ventilation device of FIG. 1;

FIG. 5 is a schematic diagram showing flows of air and a refrigerant during a heating operation of the ventilation device of FIG. 1;

FIG. 6 is a schematic vertical sectional view of a ventilation device according to a second embodiment of the present invention.

FIG. 7 is a schematic diagram showing a configuration of a conventional ventilation device.

[Explanation of symbols]

 Reference Signs List 30 main body 32 outside air suction port 34 air supply port 36 return air port 38 exhaust port 40,52 dust collection filter 42,44,56 heat exchanger 46 humidifying plate 48,58 water receiving tray 50 air supply fan 54 exhaust fan 59 partition wall 60 compression Machine 62 Four-way valve 64, 68 Check valve 66 Throttle device 70 Desiccant element 71, 72 Heating device E Exhaust path M1, M2 Ventilation apparatus S Supply air path

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Shuichi Inoue 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. F-term (reference) 3L053 BC02 BC03 BC05 3L055 AA01 BA01 CA04 DA05

Claims (10)

[Claims] In one unit, an air supply path for supplying outdoor air into a room, an exhaust path blocked by the air supply path and a partition and discharging indoor air to the outside are formed, and a compressor is provided. And the first heat exchanger, the expansion device, and the second heat exchanger are sequentially connected to form a refrigeration cycle, and the first and second heat exchangers are mounted in the air supply and exhaust paths, respectively. Installing the compressor and the throttle device outside the air supply and exhaust paths, operating the first and second heat exchangers as an evaporator and a condenser, respectively, and cooling the condenser with room air. And a ventilator that cools outdoor air by an evaporator and guides the air into the room. 2. A four-way valve is provided in the refrigeration cycle outside the supply and exhaust paths, and the four-way valve is switched to operate the first and second heat exchangers as a condenser and an evaporator, respectively. 2. The ventilation device according to claim 1, wherein the evaporator is heated by air, and simultaneously, the outdoor air is heated by a condenser and guided into the room. 3. A refrigeration cycle including a third heat exchanger that operates as a condenser, and the compressor, the four-way valve, and the third heat exchanger are mounted on a second unit separate from the unit. The ventilation device according to claim 2. 4. The ventilator according to claim 2, wherein a third heat exchanger that operates as a condenser is disposed downstream of the first heat exchanger. 5. The water in the exhaust gas from the room condensed by the second heat exchanger operating as an evaporator is guided to the first heat exchanger operating as a condenser in the air supply path, and is evaporated. 3. The ventilation device according to claim 2, wherein the ventilation device is returned to the room. 6. The second heat exchanger is disposed at a position higher than the first heat exchanger, and the water condensed in the second heat exchanger is transferred to the first heat exchanger by its own weight. 6. The ventilation device according to claim 5, wherein the ventilation device is guided. 7. A humidifying plate is provided downstream of the first heat exchanger operating as a condenser in the air supply path, and a humidifying plate from a room condensed by the second heat exchanger operating as an evaporator is provided. 3. The ventilation device according to claim 2, wherein the moisture in the exhaust gas is guided to the humidifying plate, evaporated and returned to the room. 8. An air supply path for supplying outdoor air to the room and an exhaust path for discharging indoor air to the outside of the room are formed in one unit, and the unit rotates orthogonally to the air supply and exhaust paths. A desiccant element is provided, and a compressor, a first heat exchanger, a throttle device, and a second heat exchanger are sequentially connected to form a refrigeration cycle, and the first heat exchanger is provided in the air supply path. Disposed on the upstream side of the desiccant element, while a heating device is disposed on the upstream side of the desiccant element in the exhaust path, the compressor and the expansion device are mounted outside the supply and exhaust paths, The first heat exchanger is operated as an evaporator to cool and dehumidify the outdoor air by the evaporator, and the cooled and dehumidified outdoor air is further dehumidified by the desiccant element and guided into the room, and the desiccant element Water adsorbed by A ventilator that discharges the minute by the heating device. 9. The ventilation device according to claim 8, wherein the second heat exchanger is arranged upstream of the heating device to operate as a condenser. 10. The ventilator according to claim 8, wherein a four-way valve is provided in the refrigeration cycle outside the air supply and exhaust paths, and the air guided into the room is dehumidified or humidified by switching the four-way valve. .