JP2000320863A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively put a condensate generated in an air cycle into a practical use in an air conditioner utilizing the cycle. SOLUTION: The air conditioner comprises an air cycle circuit 11 in which a compressor 21, a heat exchanger 30 and an expansion unit 22 are sequentially connected, and a gas-liquid separator 90 provided at a downstream side of the unit 22. The conditioner further comprises a first system 20 for introducing outdoor air, cooling the air by the circuit 11, and supplying the air into a room, a second system 40 for introducing indoor air, heat exchanging the indoor air with the air of the first system 20 in the exchanger 30, and exhausting the indoor air out of the room, and a water introducing unit 42 for humidifying and cooling the air of the system 40 in the exchanger 30 by the condensate in the separator 90.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an air conditioner, and more particularly, to an air conditioner using an air cycle.

[0002]

2. Description of the Related Art In recent years, interest in global environmental issues has increased,
There is concern about the effects of artificial synthetic refrigerants on the natural environment. Therefore, the necessity of an air conditioner using air as a refrigerant has increased more than ever. Conventionally, as such an air conditioner, for example, Japanese Patent Laid-Open No.
As disclosed in Japanese Patent Application Laid-Open No. 9-9, an air conditioner utilizing an air cycle is known.

An air conditioner using an air cycle will be described with reference to FIG. In the air cycle,
Air as a refrigerant is sucked into the compressor (101), adiabatically compressed, and its temperature rises. The high-temperature air discharged from the compressor (101) is cooled by the atmosphere via the heat exchanger (102), and is sucked into the expander (103). The air sucked into the expander (103) undergoes adiabatic expansion to lower the temperature and become low-temperature air. Then, the low-temperature air is supplied to the room (107) to cool the room (107).

In the air cycle, water in the air condenses during cooling or expansion, and condensed water (106) is generated. Usually, since the condensed water (106) is discharged as drain, the refrigerating capacity is reduced by an amount of heat corresponding to the latent heat of condensation. Therefore, in order to effectively use the condensed water (106), various methods of using the condensed water (106) have been proposed. For example, in the apparatus disclosed in the above publication, as shown in FIG. 7, a water jacket (105) is provided on a casing (104) of a compressor (101),
A method of cooling the compressor (101) by supplying the condensed water (106) to the water jacket (105) has been proposed. Also, the condensed water is sprayed outside the heat exchanger (102),
A method of cooling the heat exchanger (102) itself has also been proposed.

[0005]

However, in the above apparatus, the compressor (101) and the heat exchanger (102) are cooled by the condensed water (106) for the time being, but both are cooled from the outside. The effect of cooling was hard to say enough. Also,
Since the condensed water whose temperature has risen by cooling the compressor (101) and the heat exchanger (102) was discharged as drain as it is,
It was hard to say the degree of use was sufficient.

[0006] The present invention has been made in view of such a point, and an object of the present invention is to effectively utilize condensed water generated by an air cycle.

[0007]

In order to achieve the above object, the present invention provides a method for adding condensed water generated by an air cycle of a first air to a second air for cooling the first air. In addition, improvement of the efficiency of the air cycle, non-water supply humidification using the second air, omission of the drain treatment, and the like were determined.

[0008] Specifically, the air conditioner according to the present invention provides heat exchange with the first air cooled by performing an air cycle including compression, cooling and expansion, or the first air after compression in the air cycle. (51) an air conditioner for supplying at least one of the second air heated by performing the above to the room and adding condensed water of the first air generated in the air cycle to the second air. Is to be provided.

According to the above, the condensed water of the first air generated in the air cycle is directly supplied to the second air.
As a result, the second air that performs heat exchange with the first air is humidified and cooled, and the temperature decreases. Therefore, the cooling of the first air is promoted, and the efficiency of the air cycle is improved.

Another air conditioner according to the present invention comprises a compressor (21) for compressing first air, and a heat exchanger (21) for exchanging heat of the first air from the compressor (21) with second air. 30), an expander (22) for expanding the first air from the heat exchanger (30), and the first condensed in the heat exchanger (30) or the expander (22).
Humidifying means (51) for adding moisture in the air to the second air, wherein the first air from the expander (22) or the heat exchanger (30) is provided.
Is supplied to the room from the second air.

According to the above, the moisture in the first air condensed in the heat exchanger or the expander is added to the second air. As a result, the second air is humidified and cooled, and the temperature decreases. Therefore, heat exchange between the first air and the second air in the heat exchanger is promoted, and the efficiency of the air cycle is improved.

[0012] The air conditioner may be configured to supply the expanded first air into the room to perform cooling.

According to the above, the first air cooled by performing the air cycle is supplied to the room, and the room is cooled.

The air conditioner may be configured to take in at least outdoor air as the first air, take in at least room air as the second air, and discharge the second air after heat exchange to the outside. .

According to the above, the first air containing the outdoor air is supplied into the room, and the second air containing the room air is discharged outside the room, so that the room is ventilated. Therefore, indoor air quality is improved. Further, a part of the cold heat of the air discharged from the room to the outside is recovered, and the efficiency of the cooling is improved.

Incidentally, the amounts of the first air and the second air do not necessarily have to be equal, but the amount of air taken into the room and the amount of air discharged outside the room need to be equal to each other.

Therefore, the air conditioner takes in the mixed air of outdoor air and indoor air as the first air,
It may be configured such that indoor air is taken in as air, and the second air after the heat exchange is discharged outside the room.

According to the above, even if the flow rates of the first air and the second air are different, the amount of air taken into the room can be reduced by adjusting the mixing ratio of the outdoor air and the room air in the first air. The amount of air discharged outside the room can be made equal.

The humidifying means (51) is configured to supply moisture to at least the second air in the heat exchanger (30) so as to humidify and cool the second air that is performing heat exchange with the first air. It is preferred that

According to the above, the second air is humidified and cooled by the condensed water of the first air, and the second air is directly cooled to a lower temperature. Therefore, heat exchange between the first air and the second air is promoted, and the temperature of the first air becomes lower. As a result, the efficiency of the air cycle is improved, and the condensed water is effectively used.

[0021] Reducing the temperature of the pre-expansion air in the air cycle is very effective in reducing the compression ratio of the air cycle and thus improving the efficiency. Therefore, the humidifying means may be configured to humidify and cool at least the second air before heat exchange.

According to the above, since the second air is pre-cooled before exchanging heat with the first air, it becomes a lower-temperature air and exchanges heat with the first air. Therefore, the first air is cooled to a lower temperature, and the temperature of the first air before expansion further decreases.

[0023] The air conditioner may be configured to supply the second air after the heat exchange into the room to perform heating.

According to the above, the first air cycle is performed.
The second air heated by the air is supplied into the room, and the room is heated. As a result, heating using the air cycle is performed.

The air conditioner may be configured to take in at least outdoor air as the second air, take in at least room air as the first air, and discharge the expanded first air outside the room.

According to the above, the second air containing the outdoor air is supplied into the room, and the first air containing the room air is discharged outside the room, so that the room is ventilated. As a result, indoor air quality is improved. Further, since a part of the heat discharged from the room to the outside is recovered, the efficiency of heating is improved.

The air conditioner is configured to take in mixed air of outdoor air and room air as second air, take in room air as first air, and discharge the expanded first air outside. May be.

According to the above, even when the supply amounts of the first air and the second air are different, the amount of air taken into the room can be controlled by adjusting the mixing ratio of the outdoor air and the room air in the second air. And the amount of air discharged outside the room can be made equal.

[0029] The humidifying means may include a moisture permeable membrane.

According to the above, a preferable specific structure for humidifying the second air can be obtained.

The above-described air conditioner operates during the first cooling operation.
Air passage switching means (71, 72) for switching the air passage so as to introduce the second air into the room during the heating operation while introducing the air into the room may be provided.

By switching the air passages according to the above, the cooling operation or the heating operation is selectively executed.

[0033]

Embodiments of the present invention will be described below with reference to the drawings.

<Embodiment 1> -Configuration of Air Conditioner- As shown in FIG. 1, an air conditioner (10) of
An air conditioner configured to perform indoor cooling, comprising two air flow paths of a first system (20) and a second system (40), and a water system (51) as humidifying means. ing.

The first system (20) includes a compressor (21) and a heat exchanger (3).
0), the expander (22), and the gas-liquid separator (90) are sequentially duct-connected, and are configured so that the first air flows to perform an air cycle operation. The compressor (21), the heat exchanger (30) and the expander (22) form an air cycle circuit (11) for generating an open air cycle. This first system (20)
First inlet duct (23) connected to the inlet side of the compressor (21)
And a first outlet duct (24) connected to the air outlet of the gas-liquid separator (90). One end of the first inlet duct (23) is open to the outside in order to guide outdoor air to the compressor (21). One end of the first outlet duct (24) is open in the room to supply the air separated into gas and liquid by the gas-liquid separator (90) into the room.

The second system (40) includes a second inlet duct (43) connected to the inlet side of the heat exchanger (30) and a second outlet duct connected to the outlet side of the heat exchanger (30). (44). One end of the second inlet duct (43) is open to the room so as to take in room air as the second air. One end of the second outlet duct (44) is open to the outside so as to discharge the high-temperature second air from the heat exchanger (30) to the outside of the room.

A motor (35) is connected to the compressor (21). Further, the compressor (21) is connected to the expander (22). The compressor (21) is driven by the driving force of the motor (35) and the expansion work when air is expanded by the expander (22).

In the heat exchanger (30), a heat radiation side passage (31) and a heat absorption side passage (32) are defined. The heat radiation side passage (31) is an air passage through which the first air flows, one end of which is duct-connected to the compressor (21), and the other end of which is duct-connected to the expander (22). On the other hand, the heat absorption side passage (32) is an air passage through which the second air flows, one end of which is connected to the second inlet duct (43), and the other end of which is connected to the second outlet duct (44). . In other words, the heat exchanger (30)
The first air of (31) and the second air of the heat absorption side passage (32) are configured to exchange heat.

The heat exchanger (30) is provided with a water inlet (42). The water introduction part (42) is provided with a moisture permeable membrane through which moisture can pass. A water-side space is formed on one side defined by the moisture permeable membrane, and a heat exchanger is formed on the other side.
The heat absorbing side passage (32) of (30) is constituted. One end of a water pipe (50) is connected to the water side space. The other end of the water pipe (50) is connected to a water outlet of the gas-liquid separator (90). As a result, the water separated by the gas-liquid separator (90) is
The water is introduced into the heat exchanger (30) from the water inlet (42) through (50), and supplied to the water side space. The water in this water side space is
The water passes through the moisture permeable membrane and is directly supplied to the second air in the heat absorption side passageway (32).

As described above, the water introduction section (42) supplies moisture to the second air in the heat absorption side passage (32). Accordingly, in the heat absorbing side passage (32), the second air exchanges heat with the first air and is heated, and at the same time, moisture from the gas-liquid separator (90) evaporates in the second air. Thereby, the temperature rise of the second air is suppressed, and the temperature difference between the second air and the first air is secured. That is, the water introduction unit (42) humidifies and cools the second air so as to promote the cooling of the first air using the latent heat of evaporation of the condensed water of the first air.

-Operation- Next, the operation of the air conditioner (10) will be described.

In the first system (20), outdoor air is taken in from the first inlet duct (23) and is compressed by the compressor (21) to become high-temperature air. The high-temperature air flowing out of the compressor (21) flows into the heat-radiation-side passage (31) of the heat exchanger (30) and is cooled by the second air flowing through the heat-absorption-side passage (32). The cooled first air flows out of the heat exchanger (30) and then flows into the expander (22),
It expands and the temperature further decreases. As described above, since the temperature of the first air decreases in the heat exchanger (30) or the expander (22), part of the steam contained in the first air is condensed into condensed water. This condensed water is separated from air in the gas-liquid separator (90). This air is the first outlet duct (24)
Is supplied to the room through the cooling unit to cool the room. On the other hand, the condensed water separated in the gas-liquid separator (90) is introduced into the water inlet (42) of the heat exchanger (30) through the water pipe (50).

In the second system (40), room air is taken in from the second inlet duct (43), and the heat absorbing side passage (3) of the heat exchanger (30) is taken.
2). The second air in the heat-absorbing side passage (32) exchanges heat with the first air in the heat-radiating side passage (31), and the water introduction section (42)
Humidified by water from That is, the second air is heated by the first air, and at the same time, the water introduction section (4) is heated.
Cooled by the moisture from 2). Heat exchanger (30)
The air that has flowed out of the heat absorbing side passageway (32) of the second outlet duct (4)
It is discharged outside through 4).

According to the present air conditioner (10), since the condensed water of the first air that has undergone the air cycle is used for humidifying and cooling the second air, the condensing water is used. Effective utilization of water can be achieved.
In particular, since the condensed water is supplied to the second air that directly exchanges heat with the first air, a remarkable effect is obtained as compared with the conventional method of using the condensed water that cools the heat exchanger from the outside. Demonstrate.

Further, since the latent heat of evaporation of the condensed water is used together with the second air as a heat source for cooling the first air, the amount of the second air required for cooling the first air can be reduced. Become. Therefore, the amount of air taken in from the room can be reduced.

After the condensed water of the first air is separated in the gas-liquid separator (90), it is supplied to the second air through the water pipe (50) and finally discharged outside the room. Therefore, a drainage device for condensed water such as a drain pipe or a drain pump is not required.

Since the outdoor air is taken into the room and the room air is discharged outside the room, it is possible to ventilate the room and improve the indoor air quality.
Suitable air conditioning can be performed even in a highly airtight house.

<Embodiment 2> As shown in FIG. 2, an air conditioner (10b) according to Embodiment 2 uses mixed air of outdoor air and indoor air as first air for performing an air cycle operation. It is.

In the present air conditioner (10b), an auxiliary inlet duct (25) is connected to the first inlet duct (23) in the middle of the first inlet duct (23). That is, mixed air in which outdoor air from the first inlet duct (23) and indoor air from the auxiliary inlet duct (25) are mixed is introduced into the compressor (21).

Normally, during ventilation, the amount of air introduced into the room from outside and the amount of air exhausted from the room to the outside must be equal. In the present embodiment, the first air is a mixed air of the outdoor air and the indoor air. Therefore, the flow rate of the second air is maintained while the amount of the air introduced from the outside to the room and the amount of the air discharged from the room to the outside are equal. It is possible to set the flow rate of the first air more than that. As a result, in addition to lowering the temperature of the first air supplied to the room,
By increasing the flow rate of the first air, the air conditioning capacity can be increased. Further, it is possible to optimize the air blowing temperature.

The auxiliary inlet duct (25) is preferably provided with a damper (not shown) for adjusting the amount of indoor air taken in so that the ratio of room air in the mixed air can be adjusted. .

Third Embodiment As shown in FIG. 3, an air conditioner (10c) according to a third embodiment supplies the second air upstream of the heat exchanger (30) in the second system (40). A humidifying precooler (45) for precooling is provided.

The humidifying precooler (45) is provided with a moisture-permeable film through which moisture can pass, and an air-side space and a water-side space are defined by the moisture-permeable film. A second inlet duct (43) is connected to the air side space, through which the second air flows. A water pipe (50) is connected to this water side space,
Water is supplied to the inside. Then, in the humidifying precooler (45), the moisture in the water-side space passes through the moisture-permeable membrane and is supplied to the second air in the air-side space, and the supplied moisture evaporates in the second air. 2 The air is cooled.

In the present embodiment, since the amount of water added to the second air in the humidifying precooler (45) and the water introducing section (42) increases, the auxiliary water pipe (50) is provided in the middle of the water pipe (50). 52) is connected. The auxiliary water pipe (52) is a pipe for supplying tap water, and a water supply unit (not shown) is connected to one end of the pipe.

In the present embodiment, the room air taken in from the second inlet duct (43) as the second air is supplied to the humidifying precooler.
The air is cooled by humidification in (45), and becomes low-temperature (for example, about 21 ° C.) saturated air or air close to saturated air. The first air from the compressor (21) is supplied to the heat exchanger (3).
Heat exchange is performed with the low-temperature second air via the above (0). As a result, the first air flowing out of the heat exchanger (30) is used in the first and second embodiments.
It becomes lower temperature air than 2. The low-temperature first air expands in the expander (22), becomes further low-temperature air, and is supplied into the room from the first outlet duct (24).

As in the first embodiment, the condensed water of the first air generated in the heat exchanger (30) and the expander (22) is supplied to the gas-liquid separator.
(90), humidified pre-cooler through water pipe (50)
(45) and the water introduction section (42).

As described above, according to the present embodiment, the second air is pre-cooled before flowing into the heat absorbing side passageway (32) of the heat exchanger (30). The temperature of the first air flowing out of the side passage (31) can be reduced. Therefore,
Since the temperature of the first air flowing into the expander (22) can be reduced, the efficiency of the air cycle can be further improved.

<Fourth Embodiment> An air conditioner (10d) according to a fourth embodiment is a duct of the air conditioner (10) of the first embodiment.
The configuration of (23), (24), (43), and (44) is modified to heat the room.

In the present air conditioner (10d), the first system (20)
The first inlet duct (23) opens into the room so as to guide indoor air to the compressor (21). The first outlet duct (24)
The first air from the expander (22) is opened outside so as to be discharged outside the room. Second inlet duct (43) of second system (40)
Are open to the outside so as to take in outdoor air. The second outlet duct (44) opens into the room to supply the air heated in the heat exchanger (30) to the room.

The room air introduced as the first air from the first inlet duct (23) is compressed by the compressor (21), and is compressed by the heat exchanger.
Cooled in (30), expanded in expander (22), and gas-liquid separator (90)
And is separated into air and condensed water. The air after separation is
The air is discharged outside from the outlet duct (24). 2nd entrance duct
The outdoor air introduced as the second air from (43) exchanges heat with the first air in the heat exchanger (30), and condensed water from the gas-liquid separator (90) is added. That is, the second air is heated and humidified. Then, the second air flows out of the heat absorbing side passageway (32) of the heat exchanger (30), and is then supplied into the room from the second outlet duct (44). This allows
Indoor heating and humidification are performed.

According to the present embodiment, since the condensed water of the first air is added to the second air and supplied to the room, it is possible to perform so-called waterless humidification. Therefore,
The condensed water can be used effectively.

Further, similar to the first embodiment, the room can be ventilated.

<Fifth Embodiment> As shown in FIG. 5, an air conditioner (10e) according to a fifth embodiment is different from the fourth embodiment in that a mixed air of outdoor air and indoor air is It is what it was.

In the present air conditioner (10e), an auxiliary inlet duct (46) which is open at one end into the room and introduces room air is connected in the middle of the second inlet duct (43). That is, the second inlet duct (43) is connected to the heat absorbing side passageway (32) of the heat exchanger (30).
A mixed air in which the outdoor air sucked from the inside and the indoor air from the auxiliary inlet duct (46) are mixed is introduced.

Normally, during ventilation, the amount of air supplied from the outside to the room must be equal to the amount of air discharged from the room to the outside. In the present embodiment, since the mixed air of the outdoor air and the indoor air is used as the second air, the flow rate of the first air is smaller than the flow rate of the first air while keeping the amount of air introduced from the outside and the amount of air discharged outside the room equal. A large air flow rate can be set. As a result, the air conditioning capacity can be increased by increasing the flow rate of the second air. Further, it is possible to optimize the air blowing temperature.

In this embodiment, it is a matter of course that a damper (not shown) may be provided in the auxiliary inlet duct (46) so that the ratio of the room air in the mixed air can be adjusted.

<Sixth Embodiment> As shown in FIG. 6, an air conditioner (10f) according to a sixth embodiment includes an air passage switching means (7
By switching the air passage according to (1, 72), the cooling operation and the heating operation are selectively executed.

The air conditioner (10f) includes an outdoor air introduction duct (61) that has one end open to the outside and introduces outdoor air.
An indoor air introduction duct (62) that opens at one end into the room and introduces indoor air; an outdoor discharge duct (63) that opens at one end to the outside and discharges air to the outside; And an indoor supply duct (64) for supplying air to the vehicle.

The air passage switching means is constituted by first and second four-way switching valves (71) and (72). The first port of the first four-way switching valve (71) is connected to the outdoor air introduction duct (61), the second port is connected to the first inlet duct (23),
The port is connected to the indoor air introduction duct (62), and the fourth port is connected to the second inlet duct (43). The first port of the second four-way switching valve (72) is connected to the first outlet duct (24), the second port is connected to the outdoor discharge duct (63),
The port is connected to the second outlet duct (44), and the fourth port is connected to the indoor supply duct (64).

The other configuration is the same as that of the first embodiment, and the description thereof is omitted.

During the cooling operation, the first and second four-way switching valves are used.
(71) and (72) are set on the solid line side in the drawing. As a result, the outdoor air introduction duct (61) and the first inlet duct (23)
And the indoor air introduction duct (62) and the second inlet duct (43). Also, the first outlet duct (24)
And the indoor supply duct (64), and the second outlet duct (44) and the outdoor discharge duct (63).

The outdoor air introduced as the first air from the outdoor air introduction duct (61) passes through the first inlet duct (23), is compressed in the compressor (21), and is compressed in the heat exchanger (30). Cooled by the second air, expanded by the expander (22),
It is separated into air and condensed water in the gas-liquid separator (90).
The condensed water in the gas-liquid separator (90) is supplied to the humidifying precooler (45) and the water introduction part (42) through the water pipe (50). Gas-liquid separator
The low-temperature air in (90) is supplied to the room through the first outlet duct (24) and the indoor supply duct (64), and the room is cooled. On the other hand, the room air introduced as the second air from the room air introduction duct (62) passes through the second inlet duct (43), is pre-cooled by the humidification pre-cooler (45), and is absorbed by the heat exchanger (30). It flows into the side passage (32). In the heat absorbing side passage (32) of the heat exchanger (30), the second air is humidified and cooled by the condensed water from the water inlet (42), and exchanges heat with the first air in the heat radiating side passage (31). Do. The second air flowing out of the heat absorbing passage (32) of the heat exchanger (30) is supplied to the second outlet duct (44) and the outdoor discharge duct (6).
After 3), it is discharged outside the room.

With the above operation, the indoor cooling and ventilation are performed.

During the heating operation, the first and second four-way switching valves
(71) and (72) are set on the broken line side in the drawing. As a result, the outdoor air inlet duct (61) and the second inlet duct (43)
And the indoor air introduction duct (62) and the first inlet duct (23). Also, the first outlet duct (24)
And the outdoor discharge duct (63), and the second outlet duct (44) and the indoor supply duct (64).

The room air introduced as the first air from the room air introduction duct (62) passes through the first inlet duct (23), is compressed in the compressor (21), and is compressed in the heat exchanger (30). It exchanges heat with the second air, expands in the expander (22), and is separated into air and condensed water in the gas-liquid separator (90). The condensed water in the gas-liquid separator (90) is supplied to the humidifying precooler (45) and the water introduction part (42) through the water pipe (50). Gas-liquid separator (9
0) The air in the first outlet duct (24) and the outdoor discharge duct
It is discharged outside through (63). On the other hand, the outdoor air introduced as the second air from the outdoor air introduction duct (61) passes through the second inlet duct (43), is humidified in the humidification pre-cooler (45), and is absorbed by the heat exchanger (30). It flows into the side passage (32). In the heat absorption side passageway (32) of the heat exchanger (30), the second air exchanges heat with the first air in the heat dissipation side passageway (31) and is heated. Further, the second air is humidified by the condensed water from the water inlet (42). That is, the second air is heated and humidified in the heat-absorbing side passageway (32) of the heat exchanger (30). The second air flowing out of the heat absorption side passageway (32) of the heat exchanger (30) is supplied to the room through the second outlet duct (44) and the indoor supply duct (64). Thereby, indoor heating, humidification, and ventilation are performed.

According to this embodiment, both the cooling operation and the heating operation can be performed, and the condensed water can be effectively used in both the cooling operation and the heating operation. Further, a drain processing device is not required.

<Other Embodiments> The air used as the first air and the second air is not limited to the combinations of the above embodiments, but various combinations are possible.

For example, during cooling operation, air taken in from outside and supplied to the room may be used as the first air, and air discharged from the room to the outside may be used as the second air.

During the cooling operation, the air taken in from outside and supplied to the room may be used as the first air, and the air taken in from outside and discharged to the outside may be used as the second air.

During the cooling operation, air taken in from the room and supplied to the room may be used as the first air, and air discharged from the room to the outside may be used as the second air.

In the cooling operation, air taken in from the room and supplied to the room may be used as the first air, and air taken in from the outside and discharged to the outside may be used as the second air.

During the cooling operation, the mixed air of the room air and the outdoor air may be used as the first air, and the air taken in from the outside and discharged to the outside may be used as the second air.

During the cooling operation, the mixed air of the indoor air and the outdoor air may be used as the first air, and the mixed air of the indoor air and the outdoor air may be used as the second air.

On the other hand, during the heating operation, air taken in from the outside and discharged to the outside may be used as the first air, and air taken in from the outside and supplied to the room may be used as the second air.

During the heating operation, the air taken in from the room and discharged to the outside may be the first air, and the air taken in from the room and supplied to the room may be the second air.

During the heating operation, the air taken in from the outside and discharged to the outside may be the first air, and the air taken in from the room and supplied to the room may be the second air.

During the heating operation, the air taken in from the outdoor and discharged to the outside may be the first air, and the mixed air of the indoor air and the outdoor air may be the second air.

During the heating operation, air taken in from outside and discharged indoors and outdoors may be used as first air, and mixed air of indoor air and outdoor air may be used as second air.

[0089]

As described above, according to the present invention, the condensed water of the first air generated in the air cycle is directly supplied to the second air that performs heat exchange with the first air.
By utilizing the condensed water, the cooling of the first air can be promoted, and the efficiency of the air cycle can be improved.
Therefore, the condensed water can be used highly efficiently. Further, it is not necessary to discharge the condensed water as drain, so that drain treatment is not required.

By supplying the first air cooled by performing the air cycle into the room, the cooling operation using the highly efficient air cycle can be performed.

In the cooling operation, a first air cycle is performed.
By taking in at least the outdoor air as air and taking in at least room air as the second air for cooling the first air, and discharging the second air to the outside, it becomes possible to perform indoor ventilation. In addition, since air discharged from the room to the outside exchanges heat with air supplied from the outside to the room, a part of the cold discharged to the outside can be recovered, and the efficiency of cooling can be improved. Can be.

Since the mixed air of the outdoor air and the indoor air is the first air and the indoor air is the second air, it is not necessary to equalize the flow rates of the first air and the second air. And the flow rate of the second air can be set freely.

[0093] By configuring the humidifying means to supply moisture to the second air in the heat exchanger, the second air itself that exchanges heat with the first air itself can be directly cooled.
The air can be cooled efficiently.

The first air can be cooled to a lower temperature by humidifying and cooling the second air before the heat exchange. As a result, the first before expansion
Since the temperature of the air decreases, the efficiency of the air cycle of the first air can be improved.

By supplying the second air after the heat exchange into the room, a heating operation using a highly efficient air cycle can be performed. Further, since the second air can be humidified by the condensed water of the first air, it is not necessary to separately provide a water source for humidification, and so-called non-water supply humidification can be realized.

At the time of heating operation, at least outdoor air is taken in as the second air, at least room air is taken in as the first air, and the expanded first air is discharged outside the room, thereby performing indoor ventilation. Can be. Also,
Since the air discharged from the room to the outside performs heat exchange with the air supplied to the room from the outside, a part of the heat discharged to the outside can be recovered, and the efficiency of heating can be improved. .

At the time of the heating operation, the mixed air of the outdoor air and the indoor air is used as the second air, the indoor air is used as the first air, and the expanded first air is exhausted to the outside, so that the first air is discharged. There is no need to make the flow rate equal to the flow rate of the second air,
The flow rates of the first air and the second air can be freely set.

By providing the humidifying means with the moisture permeable membrane, it is possible to obtain a preferable specific structure for humidifying the second air with the condensed water of the first air.

An air passage switching means for switching the air passage so that the first air is introduced into the room during the cooling operation and the second air is introduced into the room during the heating operation allows either the cooling operation or the heating operation to be performed. Can also be selectively executed. Therefore, a highly efficient air cycle can be used for both the cooling operation and the heating operation.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an air conditioner according to a first embodiment.

FIG. 2 is a configuration diagram of an air conditioner according to Embodiment 2.

FIG. 3 is a configuration diagram of an air-conditioning apparatus according to Embodiment 3.

FIG. 4 is a configuration diagram of an air-conditioning apparatus according to Embodiment 4.

FIG. 5 is a configuration diagram of an air conditioner according to a fifth embodiment.

FIG. 6 is a configuration diagram of an air-conditioning apparatus according to Embodiment 6.

FIG. 7 is a configuration diagram of a conventional air conditioner using an air cycle.

[Explanation of symbols]

 (10) Air conditioner (21) Compressor (22) Expander (23) First inlet duct (24) First outlet duct (30) Heat exchanger (31) Radiation side passage (32) Heat absorption side passage (35 ) Motor (42) Water inlet (43) Second inlet duct (44) Second outlet duct (50) Water pipe (90) Gas-liquid separator

Continued on the front page (72) Inventor Kazuo Yonemoto 1304 Kanaokacho, Sakai-shi, Osaka Daikin Industries Sakai Seisakusho Kanaoka Factory F-term (reference) 3L053 BC05 BC08

Claims (12)

[Claims] At least one of first air cooled by performing an air cycle including compression, cooling, and expansion, and second air heated by performing heat exchange with the first air after compression in the air cycle. An air conditioner that supplies condensed water of the first air generated in the air cycle to the second air, wherein the humidifying means (51). 2. A compressor (21) for compressing the first air, a heat exchanger (30) for exchanging the first air from the compressor (21) with the second air, and a heat exchanger (30). An expander (22) for expanding the first air from (30), and humidifying means for adding water in the first air condensed in the heat exchanger (30) or the expander (22) to the second air. (51), which supplies the first air from the expander (22) or the second air from the heat exchanger (30) to the room. 3. The air conditioner according to claim 1, wherein the first air after expansion is supplied into a room to perform cooling. 4. The apparatus according to claim 3, wherein at least outside air is taken in as the first air, at least room air is taken in as the second air, and the second air after the heat exchange is discharged outside the room. Air conditioner. 5. A configuration in which a mixed air of outdoor air and indoor air is taken in as first air, indoor air is taken in as second air, and the second air after heat exchange is discharged outside the room. Item 4. The air conditioner according to item 3. 6. A humidifying means (51) for supplying moisture to at least the second air in the heat exchanger (30) so as to humidify and cool the second air which is performing heat exchange with the first air. The air conditioner according to any one of claims 3 to 5, wherein the air conditioner is configured as follows. 7. The humidifying means (51) is configured to humidify and cool at least the second air before heat exchange.
The air conditioner according to any one of claims 6 to 7. 8. The air conditioner according to claim 1, wherein the second air after the heat exchange is supplied into the room to perform heating. 9. The air according to claim 8, wherein at least outdoor air is taken in as the second air, at least room air is taken in as the first air, and the first air after expansion is discharged outside the room. Harmony equipment. 10. The system according to claim 1, wherein a mixed air of the outdoor air and the indoor air is taken in as the second air, the indoor air is taken in as the first air, and the expanded first air is discharged outside the room. 9. The air conditioner according to 8. 11. The air conditioner according to claim 1, wherein the humidifying means includes a moisture permeable membrane. 12. An air passage switching means (71, 72) for switching an air passage so as to introduce the first air into the room during the cooling operation and to introduce the second air into the room during the heating operation. 12. The air conditioner according to any one of 1 to 11.