JPH06154543A - Dehumidifier of steam-permeable membrane-type - Google Patents

Abstract

PURPOSE:To provide a dehumidifier of steam-permeable type which is entirely simple and compact, and can be installed easily with space-saving and noise-free operation. CONSTITUTION:A moisture absorption/desorption module 31 which receives and supplies moisture between an internal hygroscopic liquid and an external ventilated air is provided in an air duct 1 with an inlet 1a connected to an interior and outlets 1b, 1c which communicate with the interior and an exterior by switching operation of a damper 2, through the steam permeable membrane of a tube 32. A hygroscopic liquid 36 in a tank 34 is allowed to circulate through tubular paths 38, 39 is equipped with a pump 37 installed in the moisture adsorption and desorption module 31. The circulating hygroscopic liquid is selectively heated or cooled by the Peltier effect of an electronic freezing element 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water vapor permeable membrane type dehumidifier for removing water contained in indoor air.

[0002]

2. Description of the Related Art Conventionally, a dehumidifying device of this kind is known, for example, as shown in FIG. 4 (JP-A-64-5).
6118). This dehumidifier uses lithium chloride (Li
Cl) A hygroscopic liquid such as an aqueous solution keeps the relative humidity of air in contact with it at a lower value as the solute concentration is higher and the temperature is lower. That is,
In this dehumidifying device, in a room R, a moisture absorption module 31 and a fan 33 are provided in which several tubes 32 made of a water vapor permeable film made of a polyester polymer having a hydroxyl group or the like in a main chain or a side chain are arranged in parallel. Is provided, and the LiCl aqueous solution 36 stored in the tank 34 having the cooling coil 35 is circulated to the moisture absorption module 31 by the pump 37 via the conduit 38 and the conduit 39 having the throttle valve 40. On the other hand, outdoors
A moisture releasing module 41 similar to the moisture absorbing module having a fan 42 and a heater 43 are provided, and the LiCl aqueous solution branched from the pipe 39 through the throttle valve 44 and the heat exchanger 45 is pumped through the pipe 47 through the pipe 47. It is supplied to the heater 43 and the moisture releasing module 41, and is returned to the tank 34 via a pipe line 48 penetrating the heat exchanger 45.

In order to dehumidify the room R, the high-concentration LiCl aqueous solution 36 in the tank 34 cooled by the cooling coil 35 is pumped into the room moisture absorption module 3
1, the water contained in the room air sent by the fan 33 is permeated through the membrane of the tube 32 made of a water vapor permeable membrane to be absorbed in the LiCl aqueous solution. The LiCl aqueous solution that has absorbed water is warmed by the latent heat associated with water absorption and becomes low in concentration,
Although it returns to the tank 34 via the pipe 39, a part of it is heated by the pump 43 from the throttle valve 44, the heat exchanger 45 for preheating, and the heater 43 to raise the water vapor pressure and to release the outdoor moisture releasing module 41. Sent to. In the moisture releasing module 41, due to the difference in vapor pressure between the inside and outside of the water vapor permeable membrane, the water contained in the LiCl aqueous solution permeates the membrane into the atmosphere sent by the fan 42 and is released. The released LiCl aqueous solution is warmed by latent heat accompanying dehydration and becomes high in concentration, and the heat exchanger 45 warms the low-concentration LiCl aqueous solution from the indoor side, and then returns to the tank 34 by cooling.

[0004]

When the LiCl aqueous solution 36 is used for absorbing moisture in the room R, the conventional dehumidifying apparatus described above cools the cooling coil 35 of the tank 34 to the outside air in the moisture releasing module 41. When it is used for releasing moisture, it is heated by the heater 43. Then, the cooling coil 35 and the heater 43
Although not particularly specified, is usually an evaporator or a condenser of a refrigeration circuit in which a refrigerant is circulated by a compressor for household use. However, if such a refrigerating circuit is provided in the dehumidifier, the entire apparatus becomes large and the installation is troublesome, and a large installation space is required.
Since the operation noise of the compressor for heating and cooling the aqueous solution is loud, noise problems occur.

Therefore, an object of the present invention is to devise a method of heating and cooling a hygroscopic liquid such as an aqueous solution of LiCl, which can be downsized with a simple structure, can be easily installed, can reduce the installation space, and can be operated. It is an object of the present invention to provide a water vapor permeable membrane type dehumidifier capable of eliminating noise caused by the above.

[0006]

[Means for Solving the Problems] To achieve the above object,
As shown in FIG. 1, the first dehumidifying device of the present invention has a tank 34 for storing a hygroscopic liquid 36, an inlet 1a connected indoors, and outlets 1b, 1c for switching between indoor and outdoor ventilation passages. 1 and an absorption / desorption module 31 provided in the ventilation passage 1 for exchanging moisture between the hygroscopic liquid in the tube 32 made of a water vapor permeable membrane and the circulating air outside the tube 32 through the membrane. A pipe line 38 connected to the moisture absorption / desorption module 31 so as to circulate the moisture absorption liquid 36 in the tank 34 and provided with a pump 37 for pumping the moisture absorption liquid 36,
39 and an electronic refrigeration element 3 which is provided so as to be able to exchange heat with the pipe 38 or the tank 34 and selectively heats or cools the hygroscopic liquid by the Peltier effect. The second dehumidifying device of the present invention is shown in FIG.
As illustrated, the tank 34 that stores the hygroscopic liquid 36
And a tube 12 made of a water vapor permeable membrane provided in the room R
The moisture absorbing module 11 that exchanges moisture between the moisture absorbing liquid inside and the room air outside the tube 12 via a membrane, and the moisture absorbing liquid inside the tube 22 made of a water vapor permeable membrane and provided outside the tube and outside the tube 22. A moisture releasing module 21 that exchanges moisture with the outdoor air through a membrane, and the moisture absorbing module 11 and the moisture releasing module 21 are connected so as to circulate the moisture absorbing liquid 36 in the tank 34, and the moisture absorbing liquid 3
The pipes 8, 9, 10, 19, 20 provided with a pump 37 for feeding 6 under pressure and a switching valve 7 for switching the circulating direction of the hygroscopic liquid.
And an electronic refrigerating element 3 which is provided so as to be able to exchange heat with this pipe or the tank 34 and selectively heats or cools the hygroscopic liquid 36 by the Peltier effect.

[0007]

In the dehumidifying apparatus according to claim 1, when dehumidifying the room, an electric current is passed through the electronic cooling element 3 in a direction in which the element absorbs heat, and the outlet 1b of the ventilation passage 1 having the inlet 1a connected to the inside of the room is placed on the indoor side. Then, the pump 37 is started. Then, the high-concentration hygroscopic liquid 36 in the tank 34 is cooled by the heat absorption by the Peltier effect of the electronic refrigeration element 3 provided in the tank 34 or the conduit 38, while the pump 37 absorbs the air in the ventilation passage 1. It is sent to the moisture releasing module 31. The hygroscopic liquid sent into the tube 32 of the moisture absorption / desorption module 31 passes through the water vapor permeable membrane of the tube 32 due to the difference in vapor pressure, absorbs moisture contained in the indoor air flowing through the external ventilation passage 1 and absorbs moisture. The released air is returned to the room again to dehumidify the room. On the other hand, the hygroscopic liquid that has absorbed the water is slightly warmed by the latent heat accompanying the water absorption and becomes slightly low in concentration, and then returns to the tank 34. The moisture absorption operation by the circulation of the moisture absorption liquid 36 is continued until the water absorption capacity of the moisture absorption liquid is saturated. On the other hand, when releasing moisture to the outside, the electronic refrigeration element 3
A current is passed in the direction of heat generation opposite to the above, the outlet 1c of the ventilation passage 1 is switched and communicated with the outdoor side, and the pump 37 is started.
Then, the hygroscopic liquid 36 in the tank 34, which has a low concentration due to water absorption, is heated by the heat generated by the Peltier effect of the electronic refrigerating element 3 and is sent by the pump 37 to the hygroscopic module 31 in the air passage 1. The moisture absorbing liquid sent into the tube 32 of the moisture absorbing / desorbing module 31 has a moisture pressure inside and outside the water vapor permeable membrane, so that moisture inside the membrane permeates the membrane and the ventilation passage 1
The air that has been discharged into the room air flowing through and is given moisture is discharged from the outlet 1c of the ventilation path 1 to the outside of the room. on the other hand,
The hygroscopic liquid that has released the water is slightly warmed by latent heat accompanying dehydration and becomes high in concentration, and then returns to the tank 34. The moisture releasing operation by circulating the hygroscopic liquid 36 is continued until the water absorbing ability of the hygroscopic liquid is restored.

In the dehumidifying apparatus according to claim 2, when dehumidifying the room R, an electric current is passed in a direction in which the electronic refrigeration element 3 absorbs heat, and the switching valve 7 is switched to the moisture absorption module 11 side of the room R to turn the pump 37 on. to start. Then, the tank 34
The highly concentrated hygroscopic liquid 36 therein is sent to the hygroscopic module 11 in the room R by the pump 37 while being cooled by the heat absorption by the Peltier effect of the electronic refrigeration element 3 provided in the tank 34 or the pipe line. Tube 1 of moisture absorption module 11
The hygroscopic liquid sent to the inside of the tube 2 is transferred to the tube 1 due to the difference in vapor pressure.
The water contained in the indoor air flowing outside is absorbed through the water vapor permeable membrane 2 to dehumidify the room. On the other hand, the hygroscopic liquid that has absorbed the water is slightly warmed by the latent heat accompanying the water absorption and becomes slightly low in concentration, and then returns to the tank 34. The moisture absorption operation by the circulation of the moisture absorption liquid 36 is continued until the water absorption capacity of the moisture absorption liquid is saturated. On the other hand, when releasing moisture to the outside,
An electric current is applied to the electronic refrigeration element 3 in the direction of heat generation, and the switching valve 7
Is switched to the outdoor moisture release module 21 side and the pump 37
To start. Then, the tank 34 that became low concentration due to water absorption
The hygroscopic liquid 36 inside is heated by the heat generated by the Peltier effect of the electronic refrigeration element 3 and is sent to the outdoor moisture releasing module 21 by the pump 37. The hygroscopic liquid sent into the tube 22 of the moisture releasing module 21 is released to the atmosphere flowing through the moisture inside the membrane through the membrane due to the difference in vapor pressure between the inside and the outside of the water vapor permeable membrane. On the other hand, the hygroscopic liquid that has released water is slightly warmed by latent heat accompanying dehydration and becomes high in concentration, and then returns to the tank 34. The moisture releasing operation by circulating the hygroscopic liquid 36 is continued until the water absorbing ability of the hygroscopic liquid is restored.

[0009]

The present invention will be described in detail below with reference to the embodiments shown in the drawings. FIG. 1 is a circuit diagram showing an example of the water vapor permeable membrane type dehumidifier according to claim 1, and the same members as the members described in FIG. 4 are denoted by the same reference numerals. This dehumidifying device has a tank 34 for storing a LiCl aqueous solution 36 as a hygroscopic liquid.
The inlet 1a is connected to the room by a duct (not shown), and the outlets 1b, 1c are provided to the air passage 1 and the ventilation passage 1 which is switched by the opening / closing of the damper 2 to communicate indoors and outdoors through the duct (not shown). , A moisture absorption / desorption module 31 for exchanging moisture between the LiCl aqueous solution in the water vapor permeable membrane tube 32 and the circulating air outside the tube, and the air is sent from the inlet 1a side to the moisture absorption / desorption module 31. A fan 33 is provided. In addition, the pump 3 is provided at both ends of the absorption and desorption module 31.
7 are connected to each other to connect a pipe line 39 and a pipe line 39, respectively, to absorb and dehumidify the LiCl aqueous solution 36 in the tank 34.
An electronic refrigerating element 3 is provided so that it can be heat-exchanged with the above-mentioned pipe line 38 while being circulated in the above manner and selectively heating or cooling the LiCl aqueous solution by the Peltier effect.

Both sides of the electronic refrigeration element 3 to which the heat radiating plates 4a and 4b are fixed serve as a heat generating surface and a heat absorbing surface, and are connected in the forward direction to the DC power source 6 via the switch 5 at the position shown in the figure. And a heat radiating plate 4a in contact with the pipeline 38 for the LiCl aqueous solution.
While one side on one side absorbs heat and the other side generates heat, when the switch 5 is switched in the direction of the arrow and connected in the reverse direction to the DC power source 6, one side on the heat sink 4a side generates heat and the other side changes. It is designed to absorb heat. During the moisture absorption operation in which the heat radiating plate 4a absorbs heat and cools the LiCl aqueous solution flowing in the pipe 38, the damper 2 is located at the position shown in the figure and one outlet 1b of the ventilation path communicates with the inside of the room, and the heat radiating plate 4a generates heat. During the dehumidifying operation for heating the LiCl aqueous solution, the damper 2 is switched in the direction of the arrow to communicate the other outlet 1a to the outside of the room, and in any case, the fan 33 is operated to move the air in the room as shown by the arrow. Inhale through the entrance 1a.

The water vapor permeable membrane type dehumidifier having the above structure operates as follows. When dehumidifying the room, the switch 5 is moved to the position shown in FIG. 1 so that a current flows from the DC power source 6 to the electronic refrigeration element 3 in the positive direction, the damper 2 of the ventilation passage 1 is moved to the position shown in the drawing, and the outlet 1b is communicated with the room. Let and fan 33
To drive the pump 37. Then, the tank 34
The high-concentration LiCl aqueous solution 36 in the inside comes into contact with one side of the electronic refrigeration element 3 which absorbs heat by the Peltier effect via the heat radiating plate 4a while being sent through the pipe 38 by the pump 37, and is cooled and then in the ventilation passage 1 It reaches the absorption and desorption module 31 of. Sucking,
The low-temperature, high-concentration LiCl aqueous solution that has entered the tube of the moisture releasing module 31 absorbs the water contained in the indoor air that is made to flow through the ventilation passage 1 by the fan 33 through the water vapor permeable membrane that forms the tube due to the difference in vapor pressure. The air deprived of water is returned to the room through the outlet 1b to dehumidify the room. On the other hand, the LiCl aqueous solution that has absorbed water is slightly warmed by the latent heat associated with water absorption and becomes slightly low in concentration, and then returns to the tank 34. The moisture absorption operation by circulating the LiCl aqueous solution 36 is continued until the water absorption capacity of the LiCl aqueous solution is saturated. The moisture absorption operation is performed during the rainy season or summer daytime when it is highly necessary to dehumidify the room.

On the other hand, when dehydrating the LiCl aqueous solution having saturated water absorption capacity, the switch 5 is switched in the direction of the arrow so that the electric current flows in the opposite direction to the electronic refrigeration element 3 and the damper 2 in the ventilation passage 1 is rotated.
Is switched to the direction of the arrow to communicate the outlet 1c with the outside of the room, the fan 33 is driven, and the pump 37 is started. Then, the LiCl aqueous solution 36 in the tank 34, which has become low in concentration due to water absorption, is sent through the pipe 38 by the pump 37,
It contacts one surface of the electronic refrigeration element 3 which generates heat due to the Peltier effect via the heat radiating plate 4a, and is heated to reach the absorption and desorption module 31 in the ventilation passage 1. The high-temperature, low-concentration LiCl aqueous solution that has entered the tube of the moisture absorption / desorption module 31 is released into the indoor air flowing through the ventilation passage 1 due to the internal moisture permeating through the membrane due to the vapor pressure difference between the inside and outside of the water vapor permeable membrane. The air to which moisture has been added is discharged to the outside from the outlet 1c of the ventilation passage. On the other hand, the LiCl aqueous solution from which water has been released is slightly warmed by latent heat accompanying dehydration and becomes high in concentration, and then returns to the tank 34. The moisture releasing operation by circulating the LiCl aqueous solution 36 is continued until the water absorbing ability of the LiCl aqueous solution is restored. It should be noted that this moisture releasing operation is performed during the rainy season or the summer night when it is not necessary to dehumidify the room.

FIG. 2 is a circuit diagram showing an example of the water vapor permeable membrane type dehumidifier according to the second aspect. This dehumidifier is
A moisture absorbing module 11 having the same structure as the moisture absorbing and desorbing module 31 described in FIG. 1 in which several tubes 12 or 22 made of a water vapor permeable film are arranged in parallel is installed in a room R together with a fan 13.
In addition, the dehumidifying module 21 has substantially the same configuration as that of the dehumidifying device described in FIG. 1 except that the dehumidifying module 21 and the fan 23 are provided outside the room. An aqueous solution of LiCl 3 in the tank with a pump 37 installed
A three-way valve 7 for switching the circulation direction to either the moisture absorption module 11 or the moisture desorption module 21 via the conduits 9 or 19 is provided at the tip of the conduit 8 immersed in 6. 34 are connected to each other by pipelines 10 and 20, respectively. The electronic refrigerating element 3 of this embodiment has one side without the heat radiating plate 4a in direct contact with the metal tank 34, and is adapted to cool and heat the LiCl aqueous solution 36 by absorbing heat and radiating heat.

The operation of this dehumidifying device is as follows. When dehumidifying the room R, the switch 5 is set to the position shown in FIG. 2, a current is passed from the DC power source 6 to the electronic refrigeration element 3 in the positive direction, the three-way valve 7 is set to the position shown, and the fan 1
3 is driven and the pump 37 is started. Then, the high-concentration LiCl aqueous solution 36 in the tank 34, which is cooled by the electronic refrigeration element 3 that absorbs heat by the Peltier effect, is sent from the conduit 9 to the moisture absorption module 11 in the room R. Moisture absorption module 1
The low-temperature, high-concentration LiCl aqueous solution that has entered the tube 12 of No. 1 absorbs moisture from the indoor air flowing outside through the water vapor permeable membrane due to the difference in vapor pressure, and the deprived air returns to the indoor room R and returns to the indoor room. Is dehumidified. On the other hand, the LiCl aqueous solution that has absorbed water is warmed a little by the latent heat associated with the water absorption and becomes a little low concentration, and then returns to the tank 34. This moisture absorption operation causes the water absorption capacity of the LiCl aqueous solution 36 to be saturated during the daytime such as the rainy season. You can continue until you do.

On the other hand, when dehydrating the LiCl aqueous solution having saturated water absorption capacity, the switch 5 is switched in the direction of the arrow to flow a current in the opposite direction to the electronic refrigeration element 3, and the three-way valve 7 is switched to the flow path indicated by the broken line in the figure. At the same time, the fan 23 is driven and the pump 37 is started. Then, the low-concentration LiCl aqueous solution 36 in the tank 34, which is heated by the electronic refrigeration element 3 that generates heat by the Peltier effect, is sent from the conduit 19 to the outdoor moisture releasing module 21. Tube 2 of the moisture release module 21
The high-temperature, low-concentration LiCl aqueous solution that has entered the inside 2 is released to the atmosphere flowing through the fan 23 outside through the water inside because of the vapor pressure difference between the inside and outside of the water vapor permeable membrane. On the other hand, the LiCl aqueous solution from which water has been released is cooled slightly to a high concentration by the latent heat accompanying dehydration, and returns to the tank 34,
This moisture releasing operation is performed in the LiCl aqueous solution 3 at night such as in the rainy season.
This is continued until the water absorption capacity of 6 is restored.

FIG. 3 shows the moisture absorption module 11 described in FIG.
And a moisture releasing module 21, a fan and a primary heat exchanger 15 (not shown) are housed, and an intake passage and an exhaust air which are partitioned by partition plates 14a and 14b in a heat exchange type ventilation device 14 for ventilating the room to the outside. 2 shows another embodiment in which the three-way valve 7 of FIG. 2 is omitted and the heat radiating plates 4a and 4b on both sides of the electronic refrigerating element 3 are used for cooling and heating the LiCl aqueous solution 36, respectively. . Then, the LiCl aqueous solution 36 in the tank 34 is supplied to the moisture absorption module 11 through the pipe line 16 provided with the pump 37, and is heated to the moisture release module 21 through the line line 17 while contacting with the heat dissipation plate 4b. It is sent to the tank 34 and then returned to the tank 34 while being cooled by coming into contact with the heat dissipation plate 4a through the pipe line 18.

In the above embodiment, the primary heat exchanger 1 is installed from the outside.
In the moisture absorption module 11, the outside air that has been cooled through 5 and sucked in as indicated by the arrow is cooled by the heat radiating plate 4a and supplied by the pump 37 at a low temperature and a high concentration of the LiCl aqueous solution 36.
While the air is dehumidified by the same mechanism as described above and flows into the room, the air discharged from the room through the primary heat exchanger 15 as shown by the arrow has a low concentration due to moisture absorption and becomes a high temperature by heating the heat dissipation plate 4b. From the moisture release module 2
In 1, the moisture released by the same mechanism as described above is obtained and exhausted to the outside of the room. In this embodiment, both the heat absorption and heat generation of the electronic refrigeration element 3 are used to simultaneously cool the LiCl aqueous solution for absorbing moisture and heat for releasing moisture, so that the water absorbing ability is saturated even with a small amount of LiCl aqueous solution. There is an advantage that energy can be effectively used without doing so. In addition to the moisture absorption module 11, the primary heat exchanger 1
Since 5 is provided, the moisture absorption effect is large, so that a sufficient cooling feeling can be obtained by only slightly cooling the primary heat exchanger 15.

In any of the above embodiments, the electronic refrigeration element 3 is used for heating and cooling the LiCl aqueous solution 36 which is a hygroscopic liquid.
Since the Peltier effect is used, the entire device can be simplified and downsized compared to the case where a refrigeration circuit that circulates a refrigerant through a compressor is used to circulate the refrigerant, the installation is easy and the installation space can be reduced. Moreover, it is possible to eliminate the noise caused by driving. Further, the electronic refrigeration element 3 has a higher heating efficiency than the refrigeration circuit and is advantageous for the dehydration treatment of the LiCl aqueous solution. Although the cooling efficiency of the electronic refrigeration element is somewhat lower than that of the refrigeration circuit, there is no problem because the water absorption capacity of the LiCl aqueous solution recovers significantly if cooled a little.

[0019]

As is clear from the above description, in the steam permeable membrane type dehumidifier according to claim 1 of the present invention, the inlet is connected to the inside of the room, and the outlet is connected to the inside and outside of the room for ventilation communication. Inside, there is a moisture absorption / desorption module that exchanges moisture between the moisture absorbing liquid inside and the external circulating air through the water vapor permeable membrane of the tube. Since the hygroscopic liquid in the tank is circulated through the passage and the circulating hygroscopic liquid is selectively heated or cooled by the Peltier effect of the electronic refrigeration element, the refrigeration system including the compressor, the evaporator, and the condenser is cooled. Compared to the case where a circuit is used, the entire device can be simple and compact, easy to install, the installation space can be reduced, and the noise caused by the operation can be eliminated. Further, in the water vapor permeable membrane type dehumidifier according to claim 2 of the present invention, a moisture absorption module which exchanges moisture between the moisture absorbent liquid inside and the outside air is provided inside the room through the water vapor permeable membrane of the tube. The moisture releasing module is provided outside the room, and the hygroscopic liquid in the tank is circulated to either of the modules via the switching valve for switching the circulation direction and the pipeline provided with the pump. As it is designed to selectively heat or cool by the Peltier effect of the element, the whole device can be simplified and downsized, the installation is easy and the installation space can be reduced, and the noise accompanying the operation can be eliminated. You can

[Brief description of drawings]

FIG. 1 is a circuit diagram showing an embodiment of a water vapor permeable membrane type dehumidifier according to claim 1 of the present invention.

FIG. 2 is a circuit diagram showing an embodiment of a water vapor permeable membrane type dehumidifier according to claim 2 of the present invention.

FIG. 3 is a circuit diagram showing another embodiment obtained by modifying the embodiment of FIG.

FIG. 4 is a diagram showing a conventional dehumidifying device.

[Explanation of symbols]

1 ... Ventilation path, 2 ... Damper, 3 ... Electronic refrigeration element, 4a, 4b
... Heat sink, 5 ... Switch, 6 ... DC power supply, 7 ... Three-way valve,
8, 9, 10, 19, 20 ... Pipe line, 11 ... Moisture absorption module,
12,22,32 ... Tube made of water vapor permeable membrane, 13,2
3, 33 ... Fan, 14 ... Heat exchange type ventilation device, 15 ... 1
Next heat exchanger, 16, 17, 18 ... Pipe line, 34 ... Tank, 3
6 ... LiCl aqueous solution, 37 ... Pump, 38, 39 ... Pipe line.

Claims (2)

[Claims] 1. A tank (34) for storing a hygroscopic liquid (36)
And an air passage (1) in which the inlet (1a) is connected to the room and the outlet (1b, 1c) is switched between indoor and outdoor for communication, and a tube made of a water vapor permeable membrane provided in the air passage (1).
Absorption and desorption module for exchanging moisture between the hygroscopic liquid inside (32) and the circulating air outside the tube (32) through a membrane.
(31) is connected to the absorbing / releasing module (31) so as to circulate the absorbing liquid (36) in the tank (34).
A conduit (38, 38) in which a pump (37) for pumping (36) is interposed.
39) and an electronic refrigeration element (3) which is provided so as to be able to exchange heat with the pipe line (38) or the tank (34) and selectively heats or cools the hygroscopic liquid by the Peltier effect. Characteristic water vapor permeable membrane type dehumidifier. 2. A tank (34) for storing a hygroscopic liquid (36).
And a tube (12) made of a water vapor permeable membrane provided in the room (R)
A moisture absorption module (11) that exchanges moisture between a moisture absorbing liquid inside and the room air outside the tube (12) through a membrane, and moisture absorption inside a tube (22) made of a water vapor permeable membrane provided outside the room. A moisture releasing module (21) for transferring and receiving moisture between a liquid and the outdoor air outside the tube (22) through a membrane, and the moisture absorbing module (11) and the moisture releasing module (21).
A pump (37) for pumping the hygroscopic liquid (36) and a switching valve (7) for switching the circulating direction of the hygroscopic liquid are connected to the tank (34) so as to circulate the hygroscopic liquid (36). The pipes (8, 9, 10, 19, 20) and the pipes or the tank (34) are provided so as to exchange heat with each other, and selectively heat or cool the hygroscopic liquid (36) by the Peltier effect. A water vapor permeable membrane type dehumidifier comprising an electronic refrigeration element (3)