JP2006255627A - Dehumidifier - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dehumidifier having no possibility of corrosion of surrounding equipment by entrainment of hygroscopic liquid by steam separated from hygroscopic liquid at regeneration time, and having superior energy efficiency at the regeneration time. <P>SOLUTION: This dehumidifier has an absorber 1 for absorbing steam contained in air Av to be dehumidified into hygroscopic liquid L, a regenerator 2 for separating steam by heating the hygroscopic liquid L absorbed steam, and a condenser 3 for condensing separated steam. The regenerator 2 and condenser 3 are composed in a hermetic space of a low pressure (as low as almost vacuum state), and an upper region 2u of the regenerator is communicated with an upper region 3u of the condenser. A region 2b for storing the hygroscopic liquid at the lower part of the regenerator is provided with a heat exchanger 2h for charging heat from a regeneration heat source. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a type of moisture absorber that uses a liquid phase moisture absorbent (a moisture absorbent liquid).

  As shown in FIG. 4, there is a dehumidifier that absorbs moisture in the air into the hygroscopic liquid to dehumidify the room and removes and regenerates moisture from the hygroscopic liquid diluted by moisture absorption (see, for example, Patent Document 1). .

  Such a dehumidifier has two sets of dehumidifying units 110 and a concentrator 120, in which the hygroscopic liquid L is stored, and the hygroscopic liquid L includes the concentrator 120 and the dehumidifying unit 110. A return pipe 140 that is sent from the concentrator 120 to the dehumidifying unit 110 by the communicating feed pipe 130 and captures moisture contained in the room air in the moisture absorbing liquid L by the dehumidifying unit 110 and is connected to the dehumidifying unit 110 and the concentrator 120 by the return pipe 140 It is comprised so that it may collect | recover in the concentrator 120.

  The moisture recovered in the hygroscopic liquid L in the concentrator 120 is vaporized by directly heating and raising the temperature (boiling) of the hygroscopic liquid L by a heater (regeneration heat source) H equipped in the concentrator 120. From the outlet 125 provided in the upper part of the concentrator 120, the liquid is discharged to the outside. On the other hand, the hygroscopic liquid L is regenerated to have a low water content.

Further, a cooler 160 and a pump 150 for transporting the moisture absorbing liquid are interposed in the feed pipe 130, and the moisture absorbing liquid L transported from the concentrator 120 to the dehumidifying unit 110 is cooled, and the inside of the dehumidifying unit 110 is cooled. Moisture capture is promoted.
The pump 150 is connected to the control means 100 so that the flow rate of the hygroscopic liquid L can be controlled.

  As described above, in a dehumidifier using a hygroscopic liquid, moisture (water vapor) in the air is absorbed in the dehumidifying unit 110 by the concentrated liquid L such as lithium chloride or calcium chloride.

In the dehumidifier of FIG. 4, since the hygroscopic liquid is directly boiled by the heater H in the concentrator 120, the energy efficiency at the time of regeneration is relatively good, but the concentrator 120 communicates with the atmosphere through the outlet 125. Since the inside of 120 becomes atmospheric pressure, there is a limit to the concentration concentration of the hygroscopic liquid L, and sufficient concentration cannot be achieved when the temperature of the regeneration heat source (heater H) is low. That is, for example, at a low pressure such as an absorption refrigerator, moisture evaporates even if the temperature of the regeneration heat source is low. However, in the illustrated example, since the atmospheric pressure is atmospheric pressure, the boiling point temperature is higher than the low pressure. End up.
For this reason, it is necessary to select whether to increase the heat transfer area of the regeneration unit in the condenser or to increase the temperature of the regeneration heat source.

Here, the concentrated liquid of lithium chloride or calcium chloride has extremely high hygroscopicity.
On the other hand, lithium chloride and calcium chloride are highly corrosive, and thus have hindered commercialization.
That is, when the concentrated liquid of lithium chloride or calcium chloride comes into contact with air that has entered from the outside of the dehumidifier for dehumidification, splashes (of concentrated liquid of lithium chloride or calcium chloride) are entrained with the air, There is a possibility that the portion where the entrained droplets adhere will corrode.

  Therefore, conventionally, a material such as a resin is used to prevent corrosion. However, a heat exchanger made of a resin material has poor heat conductivity and durability.

Also in the dehumidifier of FIG. 4, the water vapor discharged from the hygroscopic liquid L of the concentrator (regenerator) 120 entrains the droplets of the hygroscopic liquid, or the air that has entered from the outlet 125 of the concentrator 120 is the hygroscopic liquid. If the indoor pipes 130 and 140 are made of metal along with L, they may be corroded.
For the reasons described above, in recent dehumidifiers, a type using a desiccant (solid dehumidifier) is increasing.

  Further, as shown in FIG. 5, the moisture in the air is absorbed into the moisture absorbing liquid to dehumidify the room, and the moisture absorbing liquid diluted by moisture absorption is stored in one storage tank, and the diluted moisture absorption stored in the storage tank is stored. There is a dehumidifier that sends liquid to a concentration unit and removes and regenerates water with the concentration unit (see, for example, Patent Document 2).

  The dehumidifier includes a dehumidifying unit 112 that dehumidifies room air by absorbing moisture contained in the room air into the hygroscopic liquid L, a storage tank 122 that stores the hygroscopic liquid L, and a hygroscopic liquid L that absorbs moisture. A concentrator (regenerator) 124 that removes moisture from the hygroscopic liquid L that has been fed from the storage tank 122 and absorbed moisture.

The dehumidifying unit 112 and the storage tank 122 communicate with each other so that the hygroscopic liquid L and the hygroscopic liquid L that has taken in moisture are circulated between the dehumidifying unit 112 and the storage tank 122 through the feed pipe 132 and the return pipe 142. .
The delivery pipe 132 is provided with a delivery pump 152 and a concentration sensor 170 for detecting the concentration of the hygroscopic liquid flowing through the pipe.

  Further, the moisture absorbing liquid L that has taken in moisture by the dehumidifying unit 122 is sent from the storage tank 122 to the concentrator 124 via the feed pipe 134, and the moisture in the moisture absorbing liquid is evaporated and eliminated in the concentrator 124, and is concentrated. L is configured to be returned to the storage tank 122 by a return pipe 144.

  The feed pipe 134 is provided with a delivery pump 154 and a heater H for heating the hygroscopic liquid flowing through the pipe.

  In the dehumidifier of FIG. 5, since the storage tank 122 has a sealed structure, the moisture-absorbing liquid pipe (feed pipe, return pipe) can be a sealed pipe system, which is relatively excellent in corrosion resistance.

However, since the hygroscopic liquid is heated by the heater H and then ventilated by the blower fan 124f of the concentrator 124, the heat amount of the superheated hygroscopic liquid is taken away by the wind of the blower fan 124f, and the heat loss is large. There is a problem that the energy efficiency during regeneration (concentration) is significantly reduced.
Here, in FIGS. 4 and 5 and FIGS. 1 to 3 for explaining embodiments of the present invention to be described later, arrows on each circuit (pipe) indicate the direction of fluid flow.
JP-A-7-108127 JP-A-2-140535

  The present invention has been proposed in view of the above-described problems of the prior art, and there is no risk that water vapor separated from the hygroscopic liquid during the regeneration will entrain the hygroscopic liquid and corrode surrounding equipment. The purpose is to provide a dehumidifier with good energy efficiency.

The dehumidifier of the present invention includes an absorber (1) that absorbs water vapor contained in the air (Av) to be dehumidified into the hygroscopic liquid (L), and heats the moisture absorbing liquid (L) that has absorbed the water vapor to generate water vapor. And a condenser (3) for condensing the separated water vapor, and the regenerator (2) and the condenser (3) are of low pressure (to a degree close to a vacuum state). The area (2u) above the regenerator (2) communicates with the area (3u) above the condenser (3), and the moisture absorbing liquid (L) below the regenerator (2) is formed in a sealed space. The area (2b) to be stored is provided with a heat exchanger (2h) for supplying the amount of heat from the regenerative heat source (Claim 1: see FIG. 1).
Here, the condenser (3) may be configured as a type that condenses water vapor by a heat exchanger (3h) communicating with the cooling means (4) (so-called “water cooling type”: see FIGS. 1 and 2). Alternatively, the condenser (30) itself may be provided with a cooling means such as a cooling fin (3f), and may be configured as an air-cooling type (see FIG. 2) that dissipates the heat of vaporization held by the water vapor around the condenser (30).

  In the present invention, a discharge system (L3) is provided in the lowermost region of the condenser (3 or 30). The discharge system (L3) is provided with a condenser (3 or 30) from the outside of the condenser (3 or 30). It is preferable that a check means (for example, check valve Vc3) for preventing intrusion of fluid (including gas and liquid) into the inside is interposed (Claim 2: see FIGS. 1, 2, and 3). ).

In the present invention, the supply line (11, 12) for supplying the hygroscopic liquid (L) stored in the region below the absorber (1 or 100) to the spraying means (11, 12) provided above the absorber (1 or 100). L11, L12) are provided, and the supply lines (L11, L12) are preferably provided with heat exchangers (H2, H3) for lowering the temperature of the hygroscopic liquid (L) flowing therethrough (Claim 3). : See FIGS. 1 and 2).
Alternatively, a heat exchanger (10h) is provided in a region below the absorber (10) (so-called “dough soaking”), and the heat exchanger (10h) communicates with the cold heat source (4). It is preferable that the temperature of the hygroscopic liquid (L) stored in the region below the absorber (10) is lowered (Claim 4: see FIG. 2).

  In addition to this, in the present invention, a heat exchanger (100h) is provided (so-called “dipped”) in the region below the absorber (100), and the moisture absorbing liquid (L) below the regenerator (2) is stored. The heat exchanger (2h) provided in the area to be communicated is circulated through the communication lines (Lh1, Lh2), and the compression medium (compressor 6) and the pressure reducing means (for example, the expansion valve 7) are circulated. It is preferable to mount the device (claim 5: see FIG. 2).

According to the dehumidifier of the present invention having the above-described configuration (Claim 1), the regenerator (2) and the condenser (3) are configured in a low-pressure sealed space (to an extent close to a vacuum state). Therefore, regeneration of the hygroscopic liquid (L) is performed in a low pressure atmosphere. Therefore, water vapor is sufficiently separated from the hygroscopic liquid (L) (absorbing water vapor) in the regenerator (2) even when the temperature of the regenerative heat source input to the regenerator (2) is relatively low. I can do it.
That is, according to the present invention, even when the regeneration heat source is at the same temperature, it is possible to concentrate the moisture-absorbing liquid (L) to a higher concentration than in the prior art, improving the dehumidifying performance of the dehumidifier, and improving the regeneration efficiency. It becomes good.
Moreover, in this invention, since the heat exchanger (2h) for supplying the heat quantity from a regeneration heat source is provided in the area | region where the moisture absorption liquid (L) below a regenerator (2) is stored, from a regeneration heat source The hygroscopic liquid (L) to be regenerated can be directly boiled by the amount of heat (so-called “dough pickled”), so that the energy efficiency during regeneration is good.

Since the regenerator (2) is configured in a sealed space, the separated water vapor may entrain the hygroscopic liquid (L) or its droplets and jump out of the hygroscopic device, which may corrode surrounding equipment. Is prevented.
Further, the regenerator (2) is a member that is most easily corroded by the hygroscopic liquid (L). However, according to the present invention, the regenerator (2) has a low pressure, so the portion to which the hygroscopic liquid (L) is attached. Is difficult to corrode.

Moreover, as a result of maintaining the inside of the regenerator (2) in a low-pressure atmosphere (to an extent close to a vacuum state), a pressure difference is generated between the absorber (1) and the regenerator (2), which are at atmospheric pressure. . Due to the pressure difference, the moisture absorption liquid (L) that has absorbed water vapor from the gas (atmospheric pressure) to be dehumidified in the absorber (1) flows into the regenerator (2) without applying pressure by a pump or the like. Come on.
That is, as compared with the prior art, the liquid transport means for transporting the hygroscopic liquid (L) from the absorber (1) to the regenerator (2) and the driving energy thereof are not required, so the configuration is simplified and the dehumidification is performed. Can save the energy required.

According to the above-mentioned present invention (Claim 1), the water vapor separated from the hygroscopic liquid (L) rises in the regenerator (2), and the condenser (3) in the region (2u) above the regenerator (2). It enters the upper area (3u) and condenses in the condenser (3). The condensed moisture (drain) falls in the condenser (3) and is discharged out of the condenser (3) through a discharge system (L3) provided in the lowermost region of the condenser.
Even if the water vapor separated from the hygroscopic liquid (L) entrains the droplets of the hygroscopic liquid (L), the splashes fall due to gravity when rising in the regenerator (2), and the hygroscopic liquid (L ) Does not enter the condenser (3) from the regenerator (2).

  Further, according to the present invention, since the discharge system (L3) is provided in the lowermost region of the condenser (3 or 30) (Claim 2), the condensed water is contained in the condenser (3 or 30). In this case, the discharge system (L3) can be kept airtight. In addition, the discharge system (L3) has a check means (for example, a non-intrusive means for preventing fluid (including gas and liquid) from entering the condenser (3 or 30) from the outside of the condenser (3 or 30) (for example, Since the check valve Vc3) is interposed (Claim 2), when the condensed water is discharged, air or the like enters the condenser (3 or 30) via the condensed water discharge system (L3). It is possible to prevent backflow and thereby break the low-pressure sealed state (approximately close to the vacuum state) of the condenser (3 or 30) and the regenerator (2).

Furthermore, in the present invention, a heat exchanger (100h) is provided (so-called “dipped”) in the region below the absorber (100), and the moisture absorbing liquid (L) below the regenerator (2) is stored in the region. If it communicates with the provided heat exchanger (2h), circulates the heat medium in the communication line (Lh), and a compression means (compressor 6) and a decompression means (for example, expansion valve 7) are interposed (claims) 4) Using the absorption heat generated in the absorber (100) as a regeneration heat source, it becomes possible to input the moisture absorption liquid (L) to be regenerated by the heat medium circulating through the communication lines (Lh1, Lh2). .
As a result, energy required for regeneration can be saved, and the efficiency of the system itself is further improved.

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

First, a first embodiment of the present invention will be described with reference to FIG.
The dehumidifier of the first embodiment includes an absorber 1 that absorbs water vapor from moisture (humidity) contained in the air into a hygroscopic liquid L (for example, a lithium chloride solution) and a hygroscopic liquid L that absorbs moisture. A regenerator 2 that regenerates the moisture-absorbing liquid L by heating and evaporating and separating the water; and a condenser 3 that cools the water vapor and condenses it into condensed water by removing the heat of vaporization from the water vapor separated from the moisture-absorbing liquid L. And a cooling tower 4 for supplying cold heat to the heat exchange 3h for condensing the water vapor in the condenser 3.

  An opening 1a is formed on the side (outer periphery) of the absorber 1, and a fan 1f for introducing air Av to be dehumidified into the absorber 1 is provided in the opening 1a. Further, a discharge port 1 c for discharging the dehumidified air A to the outside of the absorber 1 is formed at the upper end of the absorber 1. In the lower region 1b including the bottom of the absorber 1, a hygroscopic liquid L that has absorbed moisture in the air is stored.

The region 2u above the regenerator 2 communicates with the region 3u above the condenser 3 via a louver 23, and the regenerator 2 and the condenser 3 are in a low-pressure sealed space to a level close to a vacuum state. It is configured. In the region 2b where the hygroscopic liquid below the regenerator 2 is stored, a heat exchanger for supplying heat from a regenerative heat source (not shown) so that the water absorbed in the stored hygroscopic liquid L can be easily evaporated. 2h is provided.
Here, the regeneration heat source may be any heat source such as hot water, steam, a gas heater, or an electric heater.

  A weir 32 is formed at a position adjacent to the regenerator 2 below the louver 23 in the lower part of the condenser 3, and water produced by condensing water vapor is returned to the regenerator 2 side again. Blocking.

Returning to the absorber 1 again, above the absorber 1, a first spraying means 11 and a second spraying means 12 for spraying the moisture-absorbing liquid L into the moisture absorber 1 are provided in two upper and lower stages.
Moreover, the area | region where the moisture absorption liquid L stores in the area | region 1b below the absorber 1 and the said 1st spreading | diffusion means 11 are connected by the distribution pipe L11 which interposed the pump P1 for pumping.

  The vicinity of the bottom of the absorber 1 and the upper half of the outer circumference of the regenerator 2 and above the region where the hygroscopic liquid L is stored communicate with each other by a return pipe L12, while the vicinity of the bottom of the regenerator 2 And the said 2nd spreading | diffusion means 12 of the absorber 1 is connected by the feed piping L21.

A flow rate adjusting valve 5 is interposed in the return pipe L12.
That is, the regenerator 2 and the condenser 3 are sealed and decompressed to a state close to a vacuum state. On the other hand, the level of the hygroscopic liquid L is exposed to the atmosphere on the absorber 1 side, and there is a pressure difference between the absorber 1 side with high pressure (1 atm) and the regenerator 2 side with low pressure (close to vacuum). For this reason, the return pipe L12 that communicates the absorber 1 and the regenerator 2 does not require a pump for transporting the moisture-absorbing liquid L.
However, if the pressure difference is too large, in some cases, the flow rate of the hygroscopic liquid L must be adjusted (reduced). The flow control valve 5 is used in such a case.

  A check valve Vc2 that is a backflow prevention means and a transport pump P2 are interposed in the feed pipe L21 from the regenerator 2 side toward the absorber 1 side. The backflow prevention means does not need to be a check valve, and may be another backflow prevention mechanism.

A heat exchanger H1 for exchanging heat between the return pipe L12 and the feed pipe L21 is provided downstream of the flow control valve 5 of the return pipe L12 and downstream of the transfer pump P2 of the feed pipe L21. Is provided.
That is, in the heat exchanger H1, the temperature of the hygroscopic liquid L toward the second spraying means 12 of the hygroscopic device 1 is lowered by flowing through the feed pipe L21 by the cold heat of the hygroscopic liquid L flowing through the return piping L12. While increasing the efficiency of dehumidification, the temperature of the hygroscopic liquid L flowing through the return pipe L12 is increased to promote the evaporation of the hygroscopic liquid containing moisture in the regenerator 2.

A drain pipe L <b> 3 is provided from the bottom of the condenser 3 for discharging water produced by condensing water vapor in the condenser 3. The drainage pipe L3 is provided with a drainage pump P3 on the discharge destination side, and a check valve Vc3 serving as a backflow prevention means on the condenser 3 side.
The drainage pump P3 can be eliminated if the drainage pipe is arranged vertically below the condenser so that the condensed water is discharged to the outside of the condenser 3 by gravity. Further, the backflow prevention means does not need to be a check valve, and may be a mechanism that prevents air from flowing back to the condenser side.

  In the heat exchanger 3h of the condenser 3, the cooling water circulates between the heat exchanger 3h and the cooling tower 4 by the cooling tower 4 and the cooling water circulation lines C43 and C34. A conveyance pump P4 is interposed in the cooling water circulation line C43, and the cooling water is circulated from the cooling tower 4 to the heat exchanger 3h. Further, a heat exchanger H2 and a heat exchanger H3 are interposed in the cooling water circulation line C43, and the heat exchanger H2 cools the moisture absorbing liquid L by taking absorbed heat from the moisture absorbing liquid L flowing through the feed pipe L11. In the heat exchanger H3, the hygroscopic liquid L flowing through the feed pipe L21 is cooled.

The operation of the first embodiment will be described below.
First, dehumidification is performed by the absorber 1, and the diluted hygroscopic liquid L is naturally conveyed to the regenerator 2 due to a pressure difference between the absorber 1 and the regenerator 2.
The hygroscopic liquid L conveyed to the regenerator 2 is heated and boiled by the heater 2h in the regenerator 2 and concentrated. The steam generated here moves from the regenerator 2 to the condenser 3, and becomes condensed water by touching the heat exchanger 3 h in the condenser 3.
Condensed water collected at the bottom of the condenser 3 is discharged from the condenser 3 to the outside of the dehumidifier system via a check valve Vc3.
On the other hand, the hygroscopic liquid concentrated in the regenerator 2 is transported to the absorber 1 by the pump P2 interposed in the feed pipe L21 and used again for dehumidification.

  According to the dehumidifier of the first embodiment having the above-described configuration, the regenerator 2 and the condenser 3 are configured in a low-pressure sealed space in a state close to a vacuum. It is possible to concentrate the hygroscopic liquid to a high concentration even at the regeneration heat source temperature. That is, the regeneration heat source temperature by the heat exchanger 2h can be lowered with respect to the atmospheric pressure condition, leading to reduction of the machine and the running cost.

  The absorber 1 and the regenerator 2 have a pressure difference (difference between the atmospheric pressure and the pressure close to vacuum). Therefore, the feed pipe L12 does not require a pump for transporting the moisture-absorbing liquid L, and the initial cost and running cost. Both can be reduced. That is, as compared with the prior art, the liquid transporting means for transporting the hygroscopic liquid L from the absorber 1 to the regenerator 2 and its driving energy are not required, so the configuration is simple and the energy required for dehumidification is saved. I can do it.

  In the present embodiment, the heat exchanger 2h for supplying heat from the regeneration heat source is provided in the region 2b in which the hygroscopic liquid L is stored below the regenerator 2, so that regeneration is performed by the amount of heat from the regeneration heat source. The hygroscopic liquid L to be boiled can be directly boiled (so-called “boiled”), and the energy efficiency during regeneration can be increased.

The regenerator 2 is a sealed space, and it is possible to prevent corrosion of surrounding equipment due to water vapor separated from the hygroscopic liquid L entraining the hygroscopic liquid L or splashes thereof and jumping out of the dehumidifier.
Furthermore, since the inside of the regenerator 2 is at a low pressure, although the regenerator 2 is a member that is most easily corroded by the hygroscopic liquid L, the portion to which the hygroscopic liquid L is attached is hardly corroded.

A check valve Vc3, which is a backflow prevention mechanism interposed in a discharge pipe L3 provided below from the bottom of the condenser 3, does not suck in outside air, and the inside of the condenser 3 and the regenerator 2 is close to a vacuum. It can be kept at low pressure.
Note that the pump P3 and the check valve Vc3 are omitted by providing the discharge pipe L3 below a predetermined length (for example, 10 m) downward from the bottom of the condenser 3 and further providing an opening / closing valve in the middle of the discharge pipe L3. Is also possible.

  Here, the absorber may be of a type using a tube similar to the prior art of FIG. In other words, it is not necessary to be an open-air absorber 1 as shown in FIG.

  Next, a modification of the first embodiment will be described with reference to FIG.

Various modifications can be made to the heat exchangers H1 to H3 in the embodiment of FIG.
For example, as in the modification shown in FIG. 2, the condenser 30 is configured as an air-cooled condenser, the heat exchangers H2 and H3 in FIG. 1 are omitted, and the cooling tower 4 and the circulation are provided for the absorber 10. A heat exchanger 10h that is connected so as to be supplied with a refrigerant (for example, cooling water) from the cooling tower 4 can be directly attached (so-called “dipping”).

  The water vapor separated from the hygroscopic liquid L by the regenerator 2 is cooled and condensed by the outside air Ao through the cooling fan 3f in the air-cooled condenser 30.

When the hygroscopic liquid L is heated by the heat of absorption generated when the hygroscopic liquid L absorbs water vapor, the hygroscopic performance is deteriorated. Therefore, the absorber 10 is provided with a heat exchanger 10 h communicating with the cooling tower 4.
The heat exchanger 10h and the cooling tower 4 communicate with each other so that the cooling water can be circulated through the feed pipe C41 interposed with the pump P4 and the return pipe C14, and the cooling water cooled by the cooling tower 4 exchanges heat. The hygroscopic liquid L in the absorber 10 is cooled by being charged into the vessel 10h.

  Except for the above, the configuration is the same as that of the first embodiment of FIG.

  Next, the dehumidifier of the second embodiment will be described with reference to FIG.

3 constitutes a mechanism for transferring heat between the absorber 1 and the regenerator 2 of the dehumidifier shown in FIG.
In the absorber, heat is absorbed when the hygroscopic liquid absorbs water vapor. The second embodiment in FIG. 3 is an embodiment in which the absorbed heat is used to regenerate the hygroscopic liquid in the regenerator.

  Hereinafter, a different part from 1st Embodiment is demonstrated with reference to FIG.

  A heat exchanger 100h is provided so as to be immersed in the liquid in the region 100b where the hygroscopic liquid L is stored below the absorber 100.

The heat exchanger 100h on the absorber 100 side communicates with the heat exchanger 2h on the regenerator 2 side, the feed pipe Lh1, and the return pipe Lh2 so that the heat medium can circulate, and the compressor 6 is connected to the feed pipe Lh1. The return pipe Lh2 is provided with an expansion valve 7 which is a decompression means.
Here, CO2, R410A, R407C, R22, etc. are preferable as the heat medium flowing in the pipes Lh1, Lh2.

In the dehumidifier according to the second embodiment having the above-described configuration, the low-pressure liquid-phase heat medium depressurized by the expansion valve 7 is vaporized by taking the absorbed heat in the heat exchanger 100h in the absorber 100 and vaporizing. It becomes a heat medium. At that time, the hygroscopic liquid L in the absorber 100 is deprived of the heat of vaporization and drops in temperature.
The gas-phase heat medium is discharged to the feed pipe Lh1, compressed by the compressor 6 to become a high-temperature / high-pressure gas-phase refrigerant, and the heat of vaporization retained in the regenerator 2 is absorbed into the moisture-absorbing liquid (water vapor is absorbed in the regenerator 2). Into the liquid (Hygroscopic liquid) that is condensed and becomes a high-pressure liquid phase heat medium. Water vapor is separated from the hygroscopic liquid L to which the heat of vaporization in the regenerator 2 is input, and becomes a concentrated hygroscopic liquid L.
Then, the high-pressure liquid-phase heat medium concentrated by regeneration is discharged to the return pipe Lh2, and is decompressed by the expansion valve 7, and becomes a low-pressure liquid-phase heat medium again.

  With the configuration as shown in FIG. 3, it is not necessary to separately provide a regeneration heat source. As long as the drive source of the compressor 6 can be secured, the hygroscopic liquid L can be regenerated. That is, energy required for regeneration can be saved, and the efficiency of the dehumidifier itself is further improved.

  Other configurations and operational effects in the second embodiment in FIG. 3 are the same as those in the first embodiment in FIG. 1.

The illustrated embodiment is merely an example, and is not intended to limit the technical scope of the present invention.
For example, in the illustrated embodiment, the absorber is configured as an open type, but it can also be configured as a sealed type, such as the absorber in Patent Document 1.

The block diagram which showed the structure of the whole dehumidifier of 1st Embodiment of this invention. The block diagram which showed the structure of the modification of 1st Embodiment. The block diagram which showed the structure of the whole dehumidifier of 2nd Embodiment of this invention. The block diagram which showed an example of the structure of the whole dehumidifier in a prior art. The block diagram which showed the other example of the structure of the whole dehumidifier in a prior art.

Explanation of symbols

1, 10, 100 ... absorber 1f ... fan 10h, 100h ... heat exchanger 2 ... regenerator 2h ... heat exchanger / heater 3, 30 ... condenser 3f -Cooling fin 3h ... Heat exchanger 4 ... Cooling tower 5 ... Flow rate control valve 6 ... Compressor 7 ... Expansion valve 23 ... Louver 32 ... Weir C34, C43 ... Cooling water circulation lines H1 to H3 ... heat exchanger L12 ... return piping L21 ... feed piping P1, P3, P4 ... pump

Claims (5)

  It has an absorber that absorbs the water vapor contained in the air to be dehumidified into the hygroscopic liquid, a regenerator that heats the hygroscopic liquid that has absorbed the water vapor to separate the water vapor, and a condenser that condenses the separated water vapor. The regenerator and the condenser are configured in a low-pressure sealed space, the area above the regenerator is in communication with the area above the condenser, and the area where the hygroscopic liquid below the regenerator is stored is the regeneration heat source. A dehumidifier characterized by being provided with a heat exchanger for supplying the amount of heat from.   The dehumidifier according to claim 1, wherein a discharge system is provided in a lowermost region of the condenser, and a check means for preventing intrusion of fluid from the outside of the condenser into the condenser is interposed in the discharge system.   A supply line is provided for supplying the hygroscopic liquid stored in the area below the absorber to the spraying means provided above the absorber, and the supply line is provided with a heat exchanger for cooling the hygroscopic liquid flowing therethrough The dehumidifier according to any one of claims 1 and 2.   A heat exchanger is provided in a region below the absorber, and the heat exchanger communicates with a cold heat source so as to lower the temperature of the hygroscopic liquid stored in the region below the absorber. One or two dehumidifiers.   A heat exchanger is provided in a region below the absorber, communicates with a heat exchanger provided in a region where the hygroscopic liquid is stored below the regenerator, and circulates a heat medium in the communication line, and also includes a compression unit and a decompression unit. The dehumidifier according to claim 1, wherein the dehumidifier is interposed.

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