JP6446603B2 - Dehumidifier - Google Patents

Description

  The present invention relates to a dehumidifier capable of supplying low-humidity air to a humidity control space such as a dry room.

Conventionally, this type of dehumidifying apparatus is described in the following Patent Document 1 (Japan, JP 2013-24448 A). The prior art is configured as follows.
An adsorption rotor that is divided into a plurality of areas including a processing area, a regeneration area, and a purge area, and that adsorbs moisture in the processing air; and a heater that heats the regeneration air for separating the moisture adsorbed on the adsorption rotor; In the dehumidifying device having a rotation drive means for rotating the adsorption rotor, the supply air amount detection means for detecting the supply air quantity supplied to the secondary side and the processing area of the adsorption rotor are passed. Humidity detection means for detecting the absolute humidity of the processing air at the previous position, rotation speed control means for controlling the rotation speed of the suction rotor rotated by the rotation drive means, and processing detected by the humidity detection means Based on the absolute humidity of the air, the supply air amount detected by the supply air amount detection means, and the preset value of the supply air dew point temperature, the regeneration air amount Calculated, and a reproduction air amount control means for controlling the reproduction air amount based on the calculation result.

  According to this prior art, the regeneration air amount control means includes the absolute humidity of the processing air detected by the humidity detection means, the supply air amount detected by the supply air amount detection means, and a preset supply air amount. The regeneration air amount can be calculated based on the set value of the air dew point temperature, and the regeneration air amount can be controlled based on the calculation result. Even so, the supply side dew point temperature on the secondary side can be stabilized.

JP 2013-24448 A

However, the above prior art has the following problems.
The conventional dehumidifier is a so-called honeycomb rotor-rotating desiccant dehumidifier in which the adsorption rotor rotates at all times. The adsorption rotor used in such a dehumidifier processes paper made of inorganic fibers such as ceramic fibers into a honeycomb shape. The structured body carries a hygroscopic agent such as synthetic zeolite. For this reason, when the moisture absorbed by the adsorption rotor is removed and the moisture absorbent is regenerated, a part of the dehumidified dry air is taken out and heated to create hot air, and not only the moisture absorbent but also honeycomb molding Since the material must be heated at the same time, a great amount of energy is required when the moisture absorbent is regenerated. That is, there is a problem that it is difficult to reduce the running cost.
In addition to the above materials, adhesives and resin packings are required to form the adsorption rotor. However, due to the problem of heat resistance temperature of these adhesives and resin packings, a hygroscopic agent is around 300 ° C. It is difficult to recycle at a high temperature. For this reason, when a high boiling point compound is mixed in the dry air, the high boiling point compound accumulates without being removed from the hygroscopic agent, and the problem that the hygroscopic performance gradually decreases may arise.
An object of the present invention is to provide a dehumidifying device that is excellent in moisture absorption performance, can reduce running costs, and is not affected by the mixing of high boiling point compounds.

In order to achieve the above object, according to the present invention, for example, as shown in FIGS. 1 to 3, the dehumidifier is configured as follows.
A fixed moisture absorption tower 18 having at least three or more moisture absorbers 16a, 16b, 16c... Whose internal space is partitioned into a first chamber 12 and a second chamber 14 via a moisture absorption structure 10, and an upstream end of the return air A return air supply flow path 22 that is connected to the inlet 20 and whose downstream end is connected to the first chamber 12 of each of the hygroscopic devices 16a, 16b, 16c..., And uses a processing fan 24 provided in the middle thereof. Return air supply flow path 22 for supplying the return air RA discharged from the humidity control space DR to any one of the first chambers 12 of the moisture absorbers 16a, 16b, 16c. A dry air supply passage 28 connected to the second chamber 14 of each of the hygroscopic devices 16a, 16b, 16c... And having a downstream end connected to the dry air outlet 26, and any one of the above hygroscopic devices 16a, 16b, 16c. … Hygroscopic structure A dry air supply passage 28 for supplying dry air DA having a low dew point that has been dehumidified after passing through 0 to the dry air outlet 26, one end connected to the second chamber 14 of each of the above-described moisture absorbers 16a, 16b, 16c. The other end of the cooling circuit 30 is connected to the first chamber 12 of each of the hygroscopic devices 16a, 16b, 16c, and the air cooled by the cooling device 32 provided in the middle of the flow path. A cooling circuit 30 that is sucked by a cooling fan 34 to be switched and fed to one of the first chambers 12 of each of the above-described moisture absorbers 16a, 16b, 16c..., And an upstream end is one end of the cooling circuit 30. Is connected to the flow path between the cooling device 32 and the downstream end thereof is connected to the second chamber 14 of each of the hygroscopic devices 16a, 16b, 16c. Each of the above moisture absorptions using the regenerative air CA The regenerative air supply flow path 36 that is switchably supplied to any one of the second chambers 14a, 16b, 16c, and the upstream end are connected to the first chamber 12 of each of the hygroscopic devices 16a, 16b, 16c,. A regeneration air discharge passage 40 connected to the regeneration exhaust port 38 at the downstream end is provided. The hygroscopic structure 10 is made of an inorganic porous material and contains a particulate or massive hygroscopic material 42 that physically adsorbs moisture in the air and the hygroscopic material 42, and the hygroscopic devices 16a, 16a, The internal space of 16b, 16c ... is comprised by the air permeable casing 44 which divides | segments into the two chambers 12 and 14 in which gas can mutually flow, and the heating means 46 which heats the said hygroscopic material 42 directly. . A downstream end of the outside air introduction pipe 50 led out from the outside air inlet 48 is connected to the suction side of the processing fan 24 in the return air supply flow path 22, and the delivery side of the processing fan 24 has its delivery side The downstream end is connected between the cooling device 32 of the cooling circuit 30 and the suction side of the cooling fan 34, and the amount of air extracted from the cooling circuit 30 as the regeneration air CA is returned to the return. An air supply pipe 52 for supplying air from outside air is connected via the air supply flow path 22 and the above-described outside air introduction pipe 50.

The present invention has the following effects, for example.
As the hygroscopic material used for the hygroscopic structure, the physical hygroscopic material itself made of an inorganic porous material is used in the form of particles or lumps with a large specific surface area, so the moisture absorption per unit volume of the hygroscopic structure is maximized. Can be made.
Further, since the hygroscopic structure does not include an adhesive or resin packing, the heating temperature when the hygroscopic material is heated to regenerate the hygroscopic power can be increased to about 300 ° C. Therefore, even if high-boiling compounds are mixed in the dry air and sent to the fixed moisture absorption tower together with the return air and adsorbed to the moisture absorbent, the moisture absorbent is approximately 300 ° C. or higher during the moisture absorption regeneration. The high boiling point compound can be removed from the hygroscopic material together with moisture by heating at a high temperature.
Furthermore, when the moisture absorbed by the hygroscopic material is released and the hygroscopic power is regenerated, the heating means directly heats the hygroscopic material, so that the water adsorbed on the hygroscopic material is heated without waste and from the hygroscopic material. Can be withdrawn. Then, by pushing out the separated moisture from the moisture absorber with the low-humidity regeneration air extracted from the cooling circuit, it is possible to regenerate the moisture absorbent material with a small amount of energy consumption.
And since the fixed moisture absorption tower is equipped with at least three moisture absorbers, the honeycomb rotor rotating desiccant has three processes such as dehumidification of the return air, regeneration of the moisture absorbent, and cooling after regeneration of the moisture absorbent. Unlike the dehumidifier, it is not necessary to rotate and move the hygroscopic device with a great deal of power, and it is possible to proceed at the same time only by a switching operation such as turning on and off the air flow path and heating means.

In the present invention, the internal spaces of the hygroscopic devices 16a, 16b, 16c,... Are divided in the height direction by the hygroscopic structure 10, and the first chamber 12 is formed above the hygroscopic structure 10. The second chamber 14 is preferably formed on the lower side.
In this case, a gas that becomes high temperature in the hygroscopic device such as regenerative air enters from the lower side of the hygroscopic device and escapes to the upper side, and a low temperature gas such as return air or cooling gas to be dehumidified is Then, it enters from the upper side of the moisture absorber and comes out to the lower side. For this reason, the flow of gas is smooth and efficient, leading to a reduction in running cost.

In the present invention, it is preferable to provide a cooling device 50 a for cooling the outside air introduced into the return air supply passage 22 on the outside air introduction pipe 50.
In this case, an increase in the dew point of the return air can be minimized when the outside air is introduced into the return air.

Further, in the present invention, it is preferable to provide auxiliary heating means 36 a for heating the regeneration air CA on the upstream side of the regeneration air supply flow path 36.
In this case, it is possible to reduce the load on the heating means at the time of regenerating the hygroscopic material and the energy cost of the total dehumidifier.

It is a flowchart which shows the dehumidification apparatus of one Embodiment of this invention. It is explanatory drawing which shows an example of the fixed moisture absorption tower in this invention. It is a flowchart which shows the state which switched the flow of the fluid in FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. First, FIG. 1 is a flowchart showing a dehumidifying apparatus according to an embodiment of the present invention. As shown in this figure, the dehumidifying device of the present invention dehumidifies air and supplies it to the humidity control space DR. The humidity control space DR is a space where air with a very low humidity having a dew point temperature of around −60 ° C. is required, such as a dry room in which a production line for lithium ion batteries is housed. The dehumidifying device is generally composed of a fixed moisture absorption tower 18, a return air supply channel 22, a dry air supply channel 28, a cooling circuit 30, a regeneration air supply channel 36, and a regeneration air discharge channel 40. .

The fixed moisture absorption tower 18 is a device that dehumidifies the return air RA returned from the humidity control space DR via the return air supply flow path 22 and the outside air described later. The internal space of the fixed moisture absorption tower 18 is first through the moisture absorption structure 10. Three humidifiers 16a, 16b, and 16c are provided (in the illustrated embodiment) partitioned into a chamber 12 and a second chamber 14.
As shown in FIG. 2, the hygroscopic structure 10 is made of an inorganic porous material and contains a particulate or massive hygroscopic material 42 that physically adsorbs moisture in the air, the hygroscopic material 42, and the above-described hygroscopic material 42. A breathable casing 44 that divides the internal spaces of the hygroscopic devices 16a, 16b, and 16c into two chambers 12 and 14 through which gas can flow, and a heating means 46 that directly heats the hygroscopic material 42. Composed.

Examples of the inorganic porous material forming the hygroscopic material 42 include zeolite, silica gel, activated alumina, and the like. Zeolite is particularly suitable in view of its hygroscopic properties.
The breathable casing 44 is formed of a material that does not impair breathability and has excellent heat resistance and mechanical strength, such as a metal wire net, a heat resistant resin net, or a punching metal or an expanded metal. Is done.
Further, the heating means 46 can directly heat the moisture absorbent 42, more specifically, the moisture absorbent 42 itself and / or moisture adsorbed on the moisture absorbent 42 to directly heat the moisture absorbent 42 from the moisture absorbent 42. Any mode may be used as long as it can release moisture, and an electric heater, a microwave heating device, a high-frequency induction heating device, or the like is preferably used. In the case of the embodiment shown in FIG. 2, as the heating means 46, a sheathed heater in which a heating element such as a nichrome wire is loaded in a heater pipe made of an alumina tube or a quartz tube is meandered in a horizontal direction and height. A plurality of (three) stages are used in the direction. If such a heating means 46 is used, it becomes possible to raise the temperature of the entire hygroscopic structure 10 quickly and easily.
Incidentally, when a microwave heating device is used as the heating means 46 and the casing 44 is made of metal, it is necessary to coat the surface with glass, heat-resistant resin, or the like.

  In the illustrated embodiment, the case where three fixed moisture absorbers 16a, 16b, 16c are provided as the fixed moisture absorber 18 is shown. However, the moisture absorbers 16a, 16b, 16c,. The number should just be 3 or more, and can be suitably selected according to the quality, required amount, etc. of the target dry air. For example, the number of the moisture absorbers 16a, 16b, 16c provided in the fixed moisture absorption tower 18 is set to three as in the illustrated embodiment, thereby dehumidifying the return air RA, regenerating the moisture absorbent 42, and the moisture absorbent as described later. In addition to being able to proceed with the three steps of cooling after 42 regeneration at the same time, the size of the dehumidifier can be minimized and the space efficiency is excellent. On the other hand, when the number of moisture absorbers 16a, 16b, 16c,... Provided in the fixed moisture absorption tower 18 is four or more, the amount of dry air supplied can be increased and, as will be described later, moisture absorption for dehumidifying operation is performed. It is possible to suppress the occurrence of pressure fluctuations, hunting, and the like when switching the devices 16a, 16b, 16c.

  Further, as shown in FIG. 2, the moisture absorbers 16 a, 16 b, 16 c... Constituting the fixed moisture absorption tower 18 are bisected in the height direction by the moisture absorption structure 10, and the upper side is the first chamber 12. It is preferable to form the second chamber 14 on the lower side. By doing so, the gas that becomes high in the hygroscopic device such as regenerative air enters from the lower side of the hygroscopic device and escapes to the upper side, and becomes a low temperature such as return air or cooling gas to be dehumidified. The gas enters from the upper side of the hygroscopic device and escapes to the lower side. For this reason, the flow of gas is smooth and efficient, leading to a reduction in running cost.

  The return air supply flow path 22 is a flow path for supplying the return air RA returned from the humidity control space DR to the fixed moisture absorption tower 18, and has a pipe line 22 </ b> A whose upstream end is connected to the return air inlet 20. This pipe line 22A is branched into a plurality (three in the illustrated embodiment) on the way to become branch pipes 22A1, 22A2, 22A3, and the downstream ends thereof are connected to the first chambers 12 of the respective moisture absorbers 16a, 16b, 16c. Is done. Further, in the middle of the pipe line 22A, a processing fan 24 for supplying the return air RA discharged from the humidity control space DR toward the first chamber 12 of each of the moisture absorbers 16a, 16b, 16c is provided. A pre-cooling device 22C that cools the return air RA flowing through the pipe line 22A and lowers the dew point temperature is provided.

The downstream end of the outside air introduction pipe 50 led out from the outside air inlet 48 is connected to the suction side of the processing fan 24 in the pipe line 22 </ b> A of the return air supply passage 22. On the outside air introduction pipe 50, a cooling device 50a for cooling the outside air introduced into the return air supply passage 22 is provided as necessary. Reference numeral 50b in the figure is a pre-filter, and reference numeral 50c is a medium-performance filter, which cooperate to remove dust and the like in the outside air introduced into the outside-air introduction pipe 50 in cooperation.
On the other hand, on the delivery side of the processing fan 24 in the pipeline 22A, more specifically, on the downstream side of the pre-cooling device 22C, the upstream end is between the cooling device 32 of the cooling circuit 30 described later and the suction side of the cooling fan 34. The downstream end of the connected air supply pipe 52 is connected. As will be described later, the air supply pipe 52 is a pipe for supplying an amount of air extracted from the cooling circuit 30 as the regeneration air CA from the outside air via the return air supply passage 22 and the outside air introduction pipe 50. is there.
.. Are attached to the branch pipes 22A1, 22A2, 22A3... Branched from the pipe line 22A, and the valve 23a, 23b, 23c. The supply destination of the air RA can be switched.

The dry air supply flow path 28 passes through the moisture absorbing structure 10 of any one of the moisture absorbers 16a, 16b, and 16c, and, for example, the low dew point dry air DA that has been dehumidified to a dew point temperature of around -60 ° C. This is a flow path for feeding, and has a pipe line 28 </ b> A connected at its downstream end to the dry air outlet 26. The dry air DA that has exited the dry air outlet 26 is supplied to the humidity control space DR via the dry air pipe 54 and the dry air duct 56. The pipe 28A is branched into a plurality of (three in the illustrated embodiment) on the way to become branch pipes 28A1, 28A2, 28A3..., And their upstream ends are connected to the second chambers 14 of the respective moisture absorbers 16a, 16b, 16c. Connected. Further, a medium performance filter 58 is attached in the middle of the conduit 28A in order to remove dust and the like in the dry air DA.
Valves 29a, 29b, 29c,... Are attached to the branch pipes 28A1, 28A2, 28A3,... Where the pipe 28A is branched, and by opening and closing the valves 29a, 29b, 29c,. The supply source can be switched.

The cooling circuit 30 operates the heating means 46 of the moisture absorbing structure 10 to regenerate the moisture absorbing capacity of the moisture absorbing material 42 up to a temperature at which the moisture absorbers 16a, 16b, and 16c can be used without reducing the moisture absorbing capacity. It is a circuit for cooling and has a pipe line 30A. One end of the pipe line 30A is branched to form branch pipes 30A1, 30A2, 30A3... And connected to the second chamber 14 of each of the moisture absorbers 16a, 16b, 16c. Further, the other end also branches to form branch pipes 30Aa, 30Ab, 30Ac,... And is connected to the first chamber 12 of each of the hygroscopic devices 16a, 16b, 16c,.
A cooling fan 34 for circulating the air in the cooling circuit 30 is attached to the pipe line 30A of the cooling circuit 30, and the air in the pipe line 30A is supplied to the pipe line 30A on the suction side of the cooling fan 30. A cooling device 32 for cooling is installed. For this reason, the air cooled by the cooling device 32 is sucked by the cooling fan 34. In addition, as the cooling device 32, what cools air with the cooling coil which made chiller water flow through, etc. can be mentioned, for example.
Valves 31a, 31b, 31c... Are attached to the branch pipes 30A1, 30A2, 30A3... Where the pipe line 30A is branched, and valves 33a, 33b,. 33c ... are attached. And by opening and closing these valves 31a, 31b, 31c ... and 33a, 33b, 33c ..., the hygroscopic devices 16a, 16b, 16c cooled by the cooling circuit 30 can be switched.

  The regeneration air supply flow path 36 has an upstream end connected to a flow path between one end of the cooling circuit 30 and the cooling device 32, more specifically, a pipe connected to the upstream side of the cooling device 32 in the pipe line 30A. It has a path 36A. The downstream side of the pipe 36A is branched to form branch pipes 36A1, 36A2, 36A3,... And connected to the second chambers 14 of the hygroscopic devices 16a, 16b, 16c,. Further, valves 37a, 37b, 37c,... Are attached to the branch pipes 36A1, 36A2, 36A3,. For this reason, the regeneration air supply flow path 36 can be switched to any one of the second chambers 14 of the above-described moisture absorbers 16a, 16b, 16c... As a part of the air circulating in the cooling circuit 30 as regeneration air CA. Can be sent.

  Further, as shown in FIG. 1, auxiliary heating means 36a for heating the regeneration air CA is provided on the pipe line 36A of the regeneration air supply passage 36 as required. The auxiliary heating means 36a has its heat source set according to the energy situation at the site where the dehumidifying device is installed. For example, when saturated steam can be obtained at a low cost as a heat source at the installation site of the dehumidifier, it is preferable to use a steam heater as the auxiliary heating means 36a as in the example of FIG. By doing so, the load of the heating means 46 at the time of hygroscopic material reproduction | regeneration and the energy cost of the dehumidifier can be reduced.

  The regeneration air discharge channel 40 is for discharging moisture released from the moisture absorbent material 42 of the moisture absorbent structure 10 to the outside air via the regeneration air CA supplied to the moisture absorbers 16a, 16b, 16c. And has a conduit 40A through which used regeneration air CA containing moisture flows. The pipe 40A is branched at its upstream side to form branch pipes 40A1, 40A2, 40A3... And is connected to the first chamber 12 of each of the moisture absorbers 16a, 16b, 16c. Further, valves 41a, 41b, 41c,... Are attached to the branch pipes 40A1, 40A2, 40A3,. The downstream end of the conduit 40A is connected to the regeneration exhaust port 38.

  Reference numeral 60 in the figure denotes a return air duct that collects the dry air supplied to the humidity control space DR and becomes return air RA, and reference numeral 62 denotes a return that is sent into the return air duct 60. Return air piping for feeding the air RA to the return air inlet 20.

When supplying the ultra-low humidity dry air DA to the humidity control space DR using the dehumidifier configured as described above, the dry air DA is generated by at least one of the moisture absorbers 16a, 16b, 16c. And at least one unit regenerates the moisture absorbent 42 inside, and at least one unit cools down for preparation of dry air DA production.
For example, in the dehumidifying apparatus of the embodiment shown in FIGS. 1 and 2, the lower hygroscopic device 16c generates dry air DA, the middle hygroscopic device 16b regenerates the hygroscopic material 42, and the upper hygroscopic device 16a generates dry air. Cooling is performed to prepare for DA production.
When the dehumidifying capacity of the lower hygroscopic device 16c reaches the limit, it is necessary to switch the hygroscopic devices 16a, 16b, and 16c in order to obtain the dry air DA having the target dew point temperature. FIG. 3 shows the state after the switching. That is, for the dehumidifying device in the state of FIG. 1, the valve 23c of the return air supply flow path 22 is closed and the valve 23a is opened. Further, the valve 29c of the dry air supply passage 28 is closed and the valve 29a is opened. Furthermore, while the operation of the heating means 46 of the hygroscopic device 16b is stopped, the heating means 46 of the hygroscopic device 16c is operated, the valve 37b of the regenerative air supply flow path 36, the valve 41b of the regenerative air discharge flow path 40, and the cooling circuit. 30 valves 31a and 33a are closed, and the valve 37c of the regeneration air supply passage 36, the valve 41c of the regeneration air discharge passage 40, and the valves 31b and 33b of the cooling circuit 30 are opened. By doing so, dry air DA is generated by the upper moisture absorber 16a, cooling for preparation of dry air DA generation is performed by the middle moisture absorber 16b, and the heating means 46 is operated by the lower moisture absorber 16c. Thus, the hygroscopic material 42 is regenerated.
Hereinafter, such switching operation of each valve is sequentially performed, and the hygroscopic devices 16a, 16b, and 16c are sequentially switched.

  In addition, in the dehumidifying apparatus of this embodiment, the case where the fixed moisture absorption tower 18 is configured by three moisture absorbers 16a, 16b, and 16c has been shown. However, the stationary moisture absorption tower 18 includes four or more moisture absorbers 16a and 16b. , 16c... By doing so, the capacity of the generated dry air DA can be increased, and pressure fluctuations in the flow path and associated hunting can be reduced when various air flow paths are switched.

  10: Hygroscopic structure, 12: First chamber, 14: Second chamber, 16a, 16b, 16c: Hygroscopic device, 18: Fixed moisture absorption tower, 20: Return air inlet, 22: Return air supply flow path, 24: Processing fan, 26: Dry air outlet, 28: Dry air supply flow path, 30: Cooling circuit, 32: Cooling device, 34: Cooling fan, 36: Regeneration air supply flow path, 36a: Auxiliary heating means, 38: Regeneration exhaust 40, regeneration air discharge flow path, 42: hygroscopic material, 44: casing, 46: heating means, 48: outside air inlet, 50: outside air introduction pipe, 50a: cooling device, 52: air supply pipe, DA: dry air, DR: humidity control space, RA: return air, CA: regeneration air.

Claims (4)

A fixed moisture absorption device comprising at least three or more moisture absorbers (16a, 16b, 16c...) Whose internal space is partitioned into a first chamber (12) and a second chamber (14) via a moisture absorption structure (10). Tower (18),
The upstream end is connected to the return air inlet (20), and the downstream end is a return air supply flow path (22) connected to the first chamber (12) of each of the above-described moisture absorbers (16a, 16b, 16c...). The return air (RA) exhausted from the humidity control space (DR) using the processing fan (24) provided in the middle of the first chamber (16a, 16b, 16c,...) 12) A return air supply flow path (22) that is switchably supplied to any one of
A dry air feeding flow path (28) having an upstream end connected to the second chamber (14) of each of the above-described moisture absorbers (16a, 16b, 16c...) And a downstream end connected to a dry air outlet (26). Dry air for supplying low-dew point dry air (DA) dehumidified after passing through the hygroscopic structure (10) of any of the hygroscopic devices (16a, 16b, 16c...) To the dry air outlet (26). Feeding flow path (28),
One end is connected to the second chamber (14) of each of the hygroscopic devices (16a, 16b, 16c ...), and the other end is connected to the first chamber (12) of each of the hygroscopic devices (16a, 16b, 16c ...). In the connected cooling circuit (30), the air cooled by the cooling device (32) provided in the middle of the flow path is sucked by the cooling fan (34), and each of the above-described hygroscopic devices (16a, 16b). , 16c ...) a cooling circuit (30) for switching and feeding to any one of the first chambers (12) of the first chamber (12).
The upstream end is connected to a flow path between one end of the cooling circuit (30) and the cooling device (32), and the downstream end is the second chamber of each of the hygroscopic devices (16a, 16b, 16c...). Any one of the second chambers (14) of each of the above-mentioned moisture absorbers (16a, 16b, 16c,. A regenerative air supply flow path (36) that feeds in a switchable manner, and an upstream end is connected to the first chamber (12) of each of the above-described moisture absorbers (16a, 16b, 16c...), And a downstream end is regenerated. A dehumidifying device comprising a regeneration air discharge channel (40) connected to an exhaust port (38),
The hygroscopic structure (10) is made of an inorganic porous material and contains a particulate or massive hygroscopic material (42) that physically adsorbs moisture in the air, and the hygroscopic material (42). A breathable casing (44) that divides the internal space of the hygroscopic device (16a, 16b, 16c...) Into two chambers (12, 14) through which gas can flow, and the hygroscopic material (42 ) And heating means (46) for directly heating,
The downstream end of the outside air introduction pipe (50) led out from the outside air inlet (48) is connected to the suction side of the treatment fan (24) of the return air supply flow path (22). On the delivery side of (24), the downstream end is connected between the cooling device (32) of the cooling circuit (30) and the suction side of the cooling fan (34), and the regeneration air (CA ) As an air replenishment pipe (52) for replenishing an amount of air extracted from the cooling circuit (30) from outside air via the return air supply flow path (22) and the outside air introduction pipe (50). Is connected,
A dehumidifying device characterized by that. In the dehumidification apparatus of Claim 1,
The moisture absorbers (16a, 16b, 16c,...) Have their internal spaces divided in the height direction by the moisture absorbing structure (10), and a first chamber (above the moisture absorbing structure (10)). 12) and a second chamber (14) is formed on the lower side. In the dehumidification apparatus of Claim 1 or 2,
A dehumidifying device, wherein a cooling device (50a) for cooling the outside air introduced into the return air supply channel (22) is provided on the outside air introduction pipe (50). In the dehumidification apparatus in any one of Claims 1 thru | or 3,
A dehumidifying device, wherein an auxiliary heating means (36a) for heating the regeneration air (CA) is provided upstream of the regeneration air supply flow path (36).