JP6496228B2 - Humidity control chamber - Google Patents

Description

  The present invention relates to a humidity control chamber capable of absorbing and releasing moisture in the air.

  Conventionally, a humidity control panel using diatomaceous earth or the like has been used on the inner wall surface of a building room. The surface of the humidity control panel has a fine porous structure. For example, when the relative humidity of the air in the room is high, water vapor in the air can be absorbed. On the other hand, when the relative humidity of the air in the room is low, water vapor adsorbed on the humidity control panel is released into the air. Therefore, the humidity control panel can adjust the humidity inside the building.

JP 2004-76494 A

  Since the humidity control panel as described above has a small contact area between the air and the humidity control material, there has been a problem that the humidity control performance (moisture absorption capability and moisture release capability) is not fully utilized.

  The present invention has been devised in view of the actual situation as described above, and has as its main purpose to provide a humidity control chamber capable of maximizing the moisture absorption capability and moisture release capability of a humidity control material. .

The present invention is a humidity control chamber for adjusting the humidity of air by adsorbing water vapor in the air or releasing water vapor into the air in accordance with the relative humidity of the air. And a humidity control material disposed in the space, the casing having an inlet to which air is supplied and an outlet from which air is discharged, and the space from the inlet to the space. An air flow toward the outlet is formed, and the humidity control material is disposed on at least a surface of the sheet material, and the sheet material is spaced apart in the casing so that the surface follows the air flow. There are a plurality of sheets, and the sheet material includes a first sheet material whose surfaces on both sides face the space of the casing, only one of the surfaces faces the space of the casing, and the other surface of the sheet material. Casein Of and a second sheet material in contact with the inner surface, humidity material disposed of the second sheet material may be smaller than the humidity material disposed of the first sheet material.

  In another aspect of the present invention, the sheet material may be provided such that the end portion on the inlet side and the end portion on the outlet side are spaced apart from the inlet and the outlet, respectively.

  In another aspect of the present invention, the sheet material includes a first sheet material whose surfaces on both sides face the space of the casing, and the first sheet material has a cross section perpendicular to the air flow, A main body extending through the space, and an end portion bent from the main body along the inner surface of the casing and fixed to the casing may be included.

  In another aspect of the present invention, the sheet material may be composed of pulp fiber, nonwoven fabric, or resin.

  The present invention is a humidity control chamber for adjusting the humidity of air by adsorbing water vapor in the air or releasing water vapor into the air in accordance with the relative humidity of the air. And a humidity control material disposed in the space. The casing has an inlet to which air is supplied and an outlet from which air is discharged, and provides an air flow from the inlet to the outlet in the space.

  Therefore, according to the humidity control chamber of the present embodiment, by supplying air with high relative humidity to the inlet of the casing, water vapor can be adsorbed to the humidity control material, and dry air is taken out from the outlet of the casing. be able to. Conversely, by supplying air having a low relative humidity to the inlet of the casing, it is possible to release water vapor from the humidity control material and take out the humidified air from the outlet of the casing.

  Moreover, the humidity control material is arranged on at least the surface of the sheet material, and a plurality of the sheet materials are arranged in the casing with a space so that the surface follows the air flow. The humidity control chamber having such a configuration can increase the contact area between the air and the humidity control material. Therefore, the humidity control chamber of the present invention can maximize the moisture absorption capability and moisture release capability of the humidity control material.

  Further, it has been found that the moisture absorption / release rate of the humidity control material is affected by the heat capacity of the carrier holding it, and that the moisture absorption / release rate increases as the heat capacity decreases. In this regard, the sheet material that holds the humidity control material has a small thickness and consequently a small heat capacity. Therefore, in the humidity control chamber of the present invention, the moisture absorption / release rate of the humidity control material can also be increased.

It is a longitudinal cross-sectional view of the humidity control chamber of this embodiment. It is AA sectional drawing of the humidity control chamber of FIG. (A) And (B) is the principal part enlarged view of FIG. It is BB sectional drawing of FIG. It is a side view which shows notionally the house which utilized the humidity control chamber which concerns on embodiment of this invention for the ventilation system. It is a perspective view of the 1st chamber of this embodiment. It is a perspective view of the 2nd chamber of this embodiment. It is a flowchart which shows an example of operation | movement of the humidity control chamber of this embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Each drawing is for enhancing the understanding of the contents of the invention, and exaggerated display is included, and it is pointed out in advance that the scales and the like are not exactly the same between the drawings.

  FIG. 1 shows a longitudinal sectional view of a humidity control chamber 1 of the present embodiment. FIG. 2 is a cross-sectional view taken along the line AA in FIG. As shown in FIGS. 1 and 2, the humidity control chamber 1 of the present embodiment includes a casing 3 that divides a space 2 inside, and a humidity control material (shown in a dotted shape) located in the space in the casing 3. 4).

  In the present embodiment, the casing 3 divides, for example, a substantially rectangular parallelepiped space 2, and an inlet 5 to which air is supplied is formed on one end side, while air is discharged on the other end side. An outlet 6 is formed. Thereby, the casing 3 can provide an air flow from the inlet 5 toward the outlet 6 in the space 2. In the present embodiment, a vertical air flow from the inlet 5 toward the outlet 6 is provided in the space 2 of the casing 3.

  As for the shape of the casing 3, any shape can be adopted as long as it can partition a space inside. In a preferred embodiment, the casing 3 has a multilayer structure including an inner layer 3a on the space 2 side and an outer layer 3b on the outer side. The inner layer 3a is made of, for example, a heat insulating material. Thereby, the space 2 inside the casing 3 is thermally insulated from the outside, and as a result, the temperature of the inside air (and thus the relative humidity) can be minimized. This is effective for causing the humidity control material 4 to exhibit a stable moisture absorbing function or moisture releasing function.

  The humidity control material 4 is preferably an inorganic porous material, for example, and used by mixing one or more of diatomaceous mudstone, diatom shale, allophane, silica gel, imogolite, sepiolite, zeolite, and Oya stone. It is done. These humidity-controlling materials 4 may be in a state as produced as natural minerals, or may be baked or modified. In the present embodiment, a zeolite-based porous material is used as the humidity control material 4.

  The humidity control material 4 of this embodiment is used in a granular form. The particle diameter of the humidity control material 4 is not particularly limited, but if it becomes excessively large, the strength and the workability may be deteriorated, so that it is, for example, 2 mm or less, more preferably 1 mm or less. desirable.

  As shown in FIG. 1, the humidity control material 4 of the present embodiment is disposed on at least the surface of the sheet material 7. As the sheet material 7, any material can be adopted as long as the humidity control material 4 in the form of particles can be held on the surface. In a preferred embodiment, the sheet material 7 can be suitably selected from a paper material made of pulp fibers, a cloth material such as a nonwoven fabric or a woven fabric, and a sheet formed by a binder such as a resin.

  As the sheet material 7 of the present embodiment, a mixed paper made from a mixed material of pulp fibers and a particulate humidity control material 4 is used. Thereby, many humidity control materials 4 can be arranged not only on both surfaces of sheet material 7, but also in the inside. Further, when a cloth material or a resin material is used as the sheet material 7, the humidity control material 4 can be attached to the surface thereof using an adhesive or a binder.

  In the present invention, the sheet material 7 on which the humidity control material 4 is arranged is arranged in plural in the casing 3 with a space so that the surface follows the air flow inside the casing 3. That is, the surface of the sheet material 7 is arranged along the vertical direction in the casing 3, and a plurality of sheets are arranged at intervals in a direction perpendicular to the plane of the sheet material 7.

  The humidity control chamber 1 configured as described above can adsorb water vapor in the air to the humidity control material 4 by supplying air having a high relative humidity to the inlet 5 of the casing 3. Dry air can be taken out from the outlet 6 (hereinafter referred to as “moisture absorption mode”). Conversely, by supplying air having a low relative humidity to the inlet 5 of the casing 3, the humidity control material 4 can release water vapor into the air and take out the humidified air from the outlet 6 of the casing 3. (Hereinafter referred to as “moisture release mode”). The humidified air or dry air taken out from the humidity control chamber 1 of the present embodiment can be provided in any space as required, and can be preferably used for a residential ventilation system or the like.

  Moreover, since the humidity control material 4 of the humidity control chamber 1 of this embodiment is distribute | arranged on the surface of the some sheet material 7, it can raise the contact opportunity with the air in the casing 3, and can increase a moisture exchange area. . Therefore, the humidity control chamber 1 of the present embodiment can maximize the moisture absorption capacity and the discharge capacity of the humidity control material 4.

  Furthermore, as a result of various experiments by the inventors, the moisture absorption / release rate of the humidity control material 4 is affected by the heat capacity of the carrier (sheet material 7) that holds the humidity control material. It has been found that the wet rate is improved. In this regard, since the sheet material 7 holding the humidity control material 4 is small in thickness and has a small heat capacity, the humidity control chamber 1 of the present embodiment absorbs and releases moisture. You can also increase speed.

  As well represented in FIG. 2, the sheet material 7 includes a first sheet material 7a and a second sheet material 7b.

  As for the 1st sheet material 7a, the surface of both sides faces the space 2 of the casing 3. To face the space 2 means to be disposed so as to substantially contact the air in the space 2. On the other hand, only one surface of the second sheet material 7b faces the space 2 of the casing 3, and the other surface is in contact with the inner surface 3i of the casing 3 (that is, the inner surface of the inner layer 3a in this embodiment). , Not substantially in contact with the air in the space 2.

  FIG. 3A shows an enlarged view of a main part of the first sheet material 7a of FIG. The first sheet material 7a is bent at the main body 10 extending along the space 2 along the inner surface 3i of the casing 3 and fixed to the casing 3 along the inner surface 3i of the casing 3 in a cross section perpendicular to the air flow. Part 11. In such a first sheet material 7 a, the humidity control material 4 can be disposed on both the surface along the longitudinal direction of the main body 10 and the surface orthogonal to the main body 10 (the surface of the end portion 11). . Therefore, the humidity control material 4 can be more efficiently arranged on the inner surface of the casing 3.

  Moreover, since the main-body part 10 of the 1st sheet | seat material 7a is not contacting the inner layer 3a of the casing 3, the moisture absorption / release speed | rate of the humidity control material 4 currently hold | maintained there can be raised effectively. Therefore, it is desirable to arrange more humidity control materials 4 at such positions.

  On the other hand, FIG. 3B shows an enlarged view of a main part of the second sheet material 7b of FIG. The other surface of the second sheet material 7 b is in contact with the inner surface of the inner layer 3 a made of the heat insulating material of the casing 3. For this reason, since the 2nd sheet material 7b is hold | maintained by the casing 3, the moisture absorption-and-release rate of the humidity control material 4 falls. It is desirable to arrange relatively few humidity control materials 4 at such positions.

  From such a viewpoint, as shown in FIG. 3A, the first sheet material 7a of the present embodiment includes a plurality of unit sheet materials 12 with a humidity control material having a thickness t (two sheets in this example). ) On the other hand, the second sheet material 7b of the present embodiment has a unit sheet material 12 having a thickness t smaller than that of the first sheet material 7a, as shown in FIG. 3B. It is formed using the number of sheets. In the present embodiment, the second sheet material 7 b is formed of one unit sheet material 12. Each unit sheet material 12 is configured to have substantially the same amount of humidity conditioning material (mass). Therefore, in the humidity control chamber 1 of the present embodiment, the humidity control material arrangement amount (mass) of the second sheet material 7b is smaller than the humidity control material arrangement amount (mass) of the first sheet material 7a, and the ratio thereof. Is about 1: 2.

  The thickness t of the unit sheet material 12 is not particularly limited, but is desirably as small as possible. Thereby, more unit sheet | seat materials 12 can be arrange | positioned in the space 2 of the casing 3, improving the moisture absorption / release performance of the humidity control material 4. FIG. On the other hand, if the thickness t of the unit sheet material is too small, the strength and durability may be reduced. From such a viewpoint, the thickness t is preferably about 0.5 to 2.0 mm.

  FIG. 4 shows a cross-sectional view taken along the line BB in FIG. As shown in FIGS. 1 and 4, the sheet material 7 has an end portion 15 on the inlet 5 side and an end portion 16 on the outlet 6 side at a distance L from the inlet 5 and the outlet 6 along the air flow, respectively. It is provided in a separated position. With such a configuration, the air supplied from the inlet 5 is uniformly supplied to the gaps between the sheet materials 7 and can be taken out from the outlet 6, which ensures a moisture absorption / release action in a wide range. it can. In a preferred embodiment, the distance L is preferably about 50 to 200 mm.

  The humidity control chamber 1 of this embodiment can be used for all purposes. FIG. 5 is a side view conceptually showing a house 20 in which the humidity control chamber 1 according to the present embodiment is used for the ventilation system of the living room 25 as an example. More specifically, a system that can be air-conditioned and humidified while ventilating the living room 25 in winter will be described below.

  In the embodiment of FIG. 5, the first chamber 1 </ b> A and the second chamber 1 </ b> B having substantially the same structure are used in parallel as the humidity control chamber 1.

  The first chamber 1A is used while alternately repeating the moisture release mode and the moisture absorption mode at a predetermined time. Therefore, the 1st chamber 1A can take out the humidified air from the exit 6 at the time of moisture release mode. Moreover, the 1st chamber 1A can adsorb | suck the water vapor | steam in the air to the own humidity-control material 4 for the next moisture release mode at the time of moisture absorption mode.

  Similarly to the first chamber 1A, the second chamber 1B is used while alternately repeating the moisture release mode and the moisture absorption mode at a predetermined time. Therefore, the 2nd chamber 1B can take out the humidified air from the exit 6 at the time of moisture release mode. Moreover, the 2nd chamber 1B can absorb the water vapor | steam in air | self for the following moisture release mode at the time of moisture absorption mode.

  On the other hand, in the present embodiment, the second chamber 1B is always in an operation mode different from the operation mode of the first chamber 1A. That is, while the first chamber 1A is operated in the moisture absorption mode, the second chamber 1B is operated in the moisture absorption mode, while the second chamber 1B is operated in the moisture absorption mode. It is driven by. Therefore, in the system of the present embodiment, humidified air can be taken out substantially continuously by alternately using the moisture release mode of the first chamber 1A or the second chamber 1B.

  6 is a perspective view of the first chamber 1A, and FIG. 7 is a perspective view of the second chamber 1B. As shown in FIGS. 5 to 7, each chamber 1A and 1B is provided with two inlets 5 on the lower surface side and two outlets 6 on the upper surface side.

  Outside air is supplied to one inlet 5 of the first chamber 1 </ b> A via an outside air supply path 21. In general, in winter, the outside air has a temperature lower than that of the air in the living room 25 and thus has a higher relative humidity. The outside air supply path 21 supplies outside air having a high relative humidity to the first chamber 1A and the second chamber 1B in the winter season to execute the moisture absorption mode. For example, one end side of the outside air supply path 21 communicates with outside air through a basic ventilation port 28 provided in the foundation 26 of the house 20.

  In addition, the outside air supply path 21 includes a first branch path 21A and a second branch path 21B that are selectively switched by the switching damper 30 in the middle thereof. In the present embodiment, the first branch path 21A of the outside air supply path 21 is connected to one inlet 5 of the first chamber 1A, and the second branch path 21B of the outside air supply path 21 is connected to one inlet 5 of the second chamber 1B. Has been. Therefore, the outside air supply path 21 can control the switching damper 30 to supply outside air to only one of the first chamber 1A and the second chamber and operate in the moisture absorption mode.

  Ventilation air is supplied to the other inlet 5 of the first chamber 1 </ b> A via the ventilation air supply path 22. The ventilation air supply path 22 is a flow path for conveying air for ventilating the room 25 while air-conditioning (heating) it to the first chamber 1A and the second chamber 1B. For example, one end side is the heat source chamber 40. It is connected to the.

  The heat source chamber 40 includes a casing that partitions a thermally insulated space inside, and an indoor unit 50 of an air conditioner is disposed in the casing. In the heat source chamber 40, a first inlet 40 a that introduces outside air from the basic ventilation port 28 to the air inlet side of the indoor unit 50, and a second that introduces air (inside air) of the living room 25 from the ventilation outlet 25 b of the living room 25. An inlet 40b is provided. Further, the heat source chamber 40 is provided with an outlet 40 c on the air outlet side of the indoor unit 50 from which air exchanged by the indoor unit 50 is blown out. One end of the ventilation air supply path 22 is connected to the outlet 40c. Note that the air inlet and the air outlet of the indoor unit 50 are separated from each other so that the air is not mixed.

  Therefore, by operating the air conditioner, the indoor unit 50 in the heat source chamber 40 increases the mixture of fresh outside air and the air in the living room 25 to a desired temperature (reduces the relative humidity), and serves as ventilation air. , Can be discharged from the outlet 40c.

  The ventilation air supply path 22 includes a first branch path 22 </ b> A and a second branch path 22 </ b> B that are selectively switched by the switching damper 32 in the middle of the ventilation air supply path 22. In the present embodiment, the first branch path 22A of the ventilation air supply path 22 is the other inlet 5 of the first chamber 1A, and the second branch path 22B of the ventilation air supply path 22 is the other inlet of the second chamber 1B. 5 are connected to each other. Accordingly, the ventilation air supply path 22 supplies the warmed ventilation air generated in the heat source chamber 40 to only one of the first chamber 1A and the second chamber 1B by switching the switching damper 32. And can be operated in a moisture release mode. Thereby, from the outlet 6 of the first chamber 1A or the second chamber 1B to which the ventilation air is supplied, it is possible to take out the ventilation air humidified by receiving water vapor from the humidity control material.

  An exhaust path 23 is connected to one outlet 6 of the first chamber 1A. The exhaust path 23 is a flow path for discharging the air that has passed through the first chamber 1A and the second chamber 1B to the outside of the house 20, and, for example, one end side is outside air through the back of the house 20, the roof of the eaves, or the like. Communicated with.

Further, the exhaust path 23 includes a first branch path 23A and a second branch path 23B that are selectively switched by the switching damper 34 in the middle thereof. In the present embodiment, the first branch path 23A of the exhaust path 23 is connected to one outlet 6 of the first chamber 1A, and the second branch path 23B of the exhaust path 23 is connected to one outlet 6 of the second chamber 1B. Yes. Further, the exhaust passage 23 is provided with an exhaust fan 35 for making the first branch passage 23A and the second branch passage 23B negative pressure.

  The exhaust path 23 can discharge one of the first chamber 1 </ b> A and the second chamber 1 </ b> B to the outside of the house 20 by switching the switching damper 34. In the present embodiment, the switching damper 34 is controlled so that the exhaust path 23 is connected only to the chamber operating in the moisture absorption mode. As a result, the moisture conditioning material 4 in the chamber is deprived of water vapor, and the air with reduced relative humidity is discharged to the outside air of the house 20.

  One end of the ventilation path 24 is connected to the other outlet 6 of the first chamber 1A. The ventilation path 24 is a flow path for supplying air that has passed through the first chamber 1 </ b> A or the second chamber 1 </ b> B to the living room 25 of the house 20. The other end of the ventilation path 24 communicates with the ventilation inlet 25 a of the living room 25. In addition, the ventilation path 24 includes a first branch path 24A and a second branch path 24B that are selectively switched by the switching damper 36 in the middle thereof.

  In the present embodiment, the first branch path 24A of the ventilation path 24 is connected to another outlet 6 of the first chamber 1A, and the second branch path 24B of the ventilation path 24 is connected to another outlet 6 of the second chamber 1B. Has been. In the present embodiment, the switching damper 36 of the ventilation path 24 is switch-controlled so that the first chamber 1A or the second chamber 1B operated in the moisture release mode always communicates with the living room 25.

  The switching dampers 30, 32, 34, and 36 described above are switched and controlled by a control device (not shown) according to a predetermined processing procedure.

  The operation flow of the ventilation system configured as described above is shown in the flowchart of FIG.

  First, the control device starts timing (step S1), and then switches the first chamber 1A to the moisture release mode (step S2). Thereby, the ventilation air humidified in the first chamber 1 </ b> A is supplied to the living room 25. The moisture release mode of the first chamber 1A is obtained as follows.

[Humidity release mode of the first chamber]
By switching the switching damper 32, the first branch path 22A of the ventilation air supply path 22 and the inlet 5 of the first chamber 1A are communicated. Further, by switching the switching damper 36, the first branch path 24A of the ventilation path 24 and the outlet 6 of the first chamber 1A are communicated. Thus, the ventilation air conditioned in the heat source chamber 40 passes through the ventilation air supply path 22, is humidified in the first chamber 1 </ b> A, and is supplied to the living room 25 through the ventilation path 24.

  Next, the control device switches the second chamber 1B to the moisture absorption mode (step S3). Thereby, the water vapor of the outside air can be adsorbed in the second chamber 1B. The moisture absorption mode of the second chamber 1B is obtained as follows.

[Moisture absorption mode of the second chamber]
By switching the switching damper 30, the second branch path 21B of the outside air supply path 21 and the inlet 5 of the second chamber 1B are communicated. Further, by switching the switching damper 34, the second branch path 23B of the exhaust path 23 and the outlet 6 of the second chamber 1B are communicated. Thereby, the outside air having a high relative humidity passes through the outside air supply path 21, is absorbed by the second chamber 1 </ b> B, and is discharged to the outside of the house 20 through the exhaust path 23.

  Next, the control device determines whether or not a predetermined time has elapsed (step S4), and if the result is negative (N in step S4), loops steps S2 and S3. Therefore, until the predetermined time elapses, the first chamber 1A is operated in the moisture release mode, while the second chamber 1B is operated in the moisture absorption mode. The “time” is preferably set as the last time until the moisture release is completely completed based on the moisture absorption / release performance and the passing air volume of the humidity control material 4 of each chamber 1A and 1B.

  Next, when the result of step S4 is affirmative (Y in step S4), the control device resets the previous time count and starts a new time count (step S6).

  Next, the control device switches the first chamber 1A to the moisture absorption mode (step S7). Thereby, the moisture conditioner 4 of the first chamber 1A can absorb the water vapor of the outside air. The moisture absorption mode of the first chamber 1A is obtained as follows.

[Moisture absorption mode of the first chamber]
By switching the switching damper 30, the first branch path 21A of the outside air supply path 21 and the inlet 5 of the first chamber 1A are communicated. Further, by switching the switching damper 34, the first branch path 23A of the exhaust path 23 and the outlet 6 of the first chamber 1A are communicated. Thereby, the outside air having a high relative humidity passes through the outside air supply path 21, is absorbed by the first chamber 1 </ b> A, and is discharged to the outside of the house 20 through the exhaust path 23.

  Next, the control device switches the second chamber 1B to the moisture release mode (step S8). Accordingly, the ventilation air humidified in the second chamber 1B is supplied to the living room 25. The moisture release mode of the second chamber 1B is obtained as follows.

[Second chamber moisture release mode]
By switching the switching damper 32, the second branch path 22B of the ventilation air supply path 22 and the inlet 5 of the second chamber 1B are communicated. Further, the switching of the switching damper 36 causes the second branch path 24B of the ventilation path 24 and the outlet 6 of the second chamber 1B to communicate with each other. Thus, the ventilation air conditioned in the heat source chamber 40 passes through the ventilation air supply path 22, is humidified in the second chamber 1 </ b> B, and is supplied to the living room 25 through the ventilation path 24.

  Next, the control device determines whether or not a predetermined time has elapsed (step S9). If the result is negative (N in step S9), the control device loops over steps S7 and S8. Therefore, until the predetermined time elapses, the second chamber 1B is operated in the moisture release mode, while the first chamber 1A is operated in the moisture absorption mode. Next, when the result of step S9 is affirmative (Y in step S9), the control device resets the previous time measurement (step S10) and starts a new time measurement (step S1). Thereafter, step S2 and subsequent steps are repeated.

  Therefore, according to the ventilation system using the humidity control chamber of this embodiment, the air that has been air-conditioned and humidified can be continuously supplied to the living room 25.

DESCRIPTION OF SYMBOLS 1 Humidity control chamber 2 Space 3 Casing 4 Humidity control material 5 Inlet 6 Outlet 7 Sheet material 7a First sheet material 7b Second sheet material 10 Main part 11 of the first sheet material End part of the first sheet material

Claims (4)

A humidity control chamber for adjusting the humidity of air by adsorbing water vapor in the air or releasing water vapor into the air according to the relative humidity of the air,
A casing that divides a space inside, and a humidity control material disposed in the space,
The casing has an inlet to which air is supplied and an outlet from which air is discharged, and forms an air flow from the inlet to the outlet in the space.
The humidity control material is disposed on at least the surface of the sheet material,
A plurality of the sheet materials are arranged at intervals in the casing so that the surface follows the air flow ,
The sheet material has a first sheet material whose surfaces on both sides face the space of the casing, only one surface faces the space of the casing, and the other surface contacts the inner surface of the casing. Including a second sheet material,
A humidity control chamber , wherein the humidity control material arrangement amount of the second sheet material is smaller than the humidity control material arrangement amount of the first sheet material .   The humidity control chamber according to claim 1, wherein the sheet material is provided with an end portion on the inlet side and an end portion on the outlet side at positions spaced from the inlet and the outlet, respectively. The sheet material includes a first sheet material whose surfaces on both sides face the space of the casing;
The first sheet material has, in a cross section perpendicular to the air flow, a main body portion extending through the space, an end portion that is bent from the main body portion along the inner surface of the casing and is fixed to the casing. The humidity control chamber according to claim 1 or 2. The humidity control chamber according to any one of claims 1 to 3, wherein the sheet material is made of pulp fiber, nonwoven fabric, or resin .

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