JPH0231815A - Receiving box having humidity adjusting function - Google Patents

Abstract

PURPOSE:To obtain the receiving box which has humidity adjusting function and is free from influence of the seasons and air-conditioning by disposing the hygroscopic body of stratified porous material consisting of fiber impregnated with hygroscopic filler to a part of periphery of a impregnated with hygroscopic filler to a part of periphery of a humidity insulating box body so as to be confronted with a moisture absorbing opening, and mounting a heat generating body to the moisture discharging surface of the hygroscopic body. CONSTITUTION:The hygroscopic filler, such as calcium chloride, is impregnated in the porous material consisting of fiber, such as rock wool, piled up and integrated by using binder to make the stratified hygroscopic body 4, which is integrated with the heat generating body, such as a cable heater, fixed to one cross-sectional surface working as the moisture discharge surface. The moisture absorbing opening is provided to the bottom plate 9 of the humidity insulating box body 3 the inner surface of which is covered with polyvinyl chloride lining, and the hygroscopic body 4 is fixed to the opening with a dustproof filter 10 between. A moisture discharge opening 12 is provided to the outside of a moisture discharge door 11 which discloses the moisture discharge surface of the hygroscopic body 4 to the outside. The moisture in the receiving box is absorbed through the moisture absorbing surface of the hygroscopic body 4 and is transferred in the stratified hygroscopic body 4 by the driving force due to the difference of water content and the difference of vapor pressure. And then, the heat generating body 5 is operated to evaporate the water content in the vicinity of the heat generating body 5 to regenerate the hygroscopic filler.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a novel storage cabinet that can control the humidity inside the cabinet to prevent mold and condensation.

[Prior art and its problems]

As a conventional example of a storage cabinet having a dehumidifying function without using rotational power, there is one described in JP-A-60-103909, but this one utilizes the Peltier effect and has the following drawbacks. In other words, it has a structure in which the surrounding walls and door of the storage compartment are insulated, and a thermoelectric cooler is installed above it to dehumidify using the Peltier effect, which cools the air by bringing it into contact with a cooling body to prevent condensation. Since the water that flows down is discharged outside the storage, the difference in temperature between the air temperature and the cooling body is small in the winter, and frost may adhere to the surface of the cooling body, so the dehumidification effect is small. As a result, condensation sometimes occurred on the storage wall installed on the north wall. On the other hand, in the summer, there is a dehumidifying effect while the operation is in progress, but if the air conditioner is cooled while the dehumidifying operation is not in operation, the temperature inside the storage room will drop, and since moisture cannot escape due to the moisture insulating layer, the relative temperature will rise, and conversely it will become damp. Become.

As a result, compared to conventional wooden storage cabinets where the side panels themselves have humidity control properties, this can lead to the growth of mold and dampness of stored items.

[Object of the present invention]

The present invention was made in view of the problems of the conventional example, and its purpose is to have appropriate humidity control even when the operation is stopped, and not be affected by the season, but also by indoor air conditioning. To provide a non-powered storage cabinet capable of dehumidifying the inside without any trouble.

[Technical means for solving the problems] In order to solve the above-mentioned problems, the storage cabinet of the present invention has the following features: A moisture box (3); ■ A layered surface that holds a hygroscopic filler internally in continuous micro-voids of a porous material formed by depositing fibers in layers, and that constitutes a hygroscopic surface of the porous material. a moisture absorbing body (4) arranged facing the moisture absorption port (2); ■ a heating element attached to the moisture drainage surface which is the other layered surface of the moisture absorbing body (4); and ■ a box body (3). ) is formed on the periphery of the box body (3) toward the outside and is configured with a moisture drainage port @ that communicates with the moisture drainage surface of the moisture absorbent body (4).

; is adopted as a technical means.

[For production]

(2) Moisture in the refrigerator, which is taken in from the moisture absorption surface to the moisture absorption body (4), diffuses and moves to the side of the moisture absorption body (4) where the moisture content and vapor pressure gradient are lower.

■ In this case, the hygroscopic material (4) is a porous material formed by depositing fibers in layers, with a hygroscopic filler internally added to the micropores, and there is no air circulation under normal conditions, and there is no difference in vapor pressure or water content. The movement of water is carried out with a difference in rate.

Compared to a base material that does not contain a hygroscopic filler, it exhibits a moisture absorption capacity several times to several tens of times higher, and even a slight difference in moisture content or vapor pressure can cause moisture to move.

(2) Therefore, when the inside of the refrigerator is highly humid, the moisture taken in from the inside of the refrigerator spreads over the entire moisture absorbing plate (4).

■ After that, when the heating element (5) attached to the outside side of the moisture absorber (4) (the layered surface that is the moisture drainage surface) is made to generate heat for a predetermined period of time, the moisture near the heating element (5) turns into water vapor. It is released to the outside of the moisture absorbent body (4). As a result, the heating element (5)
As the moisture content in the vicinity decreases, the hygroscopic filler in the vicinity of the heating element (5) is regenerated.

■ Also, in order to use the moisture absorbent body (4) effectively in a space-saving manner, the moisture absorbent body (4) having the above-mentioned function is placed on the four circumferential surfaces (1
) is installed by providing a moisture absorption port (2) in a part of it.

By doing this, there is a large moisture absorption area, and there is a humidity control effect even when the dehumidification operation is not in progress, preventing dew condensation from forming on the internal walls of the refrigerator in the winter, and condensation inside the refrigerator during the indoor cooling operation in the summer. The relative humidity will not increase and the inside of the storage compartment will not become damp.

■ With the humidity control mechanism described above, effective humidity control is possible without causing condensation or mold even when the environment changes, not only when the dehumidifier is in operation but also when it is not operating. .

(Example〕 Hereinafter, the present invention will be described in detail according to illustrated embodiments.

The porous material having micro-voids used for the moisture absorbent (4) of the present invention is: (1) a material in which inorganic fibers such as rock wool or glass wool are deposited and integrated using a binder, and (2) a nonwoven fabric or the above-mentioned fiberboard with a desired thickness. There are also those that have integrated layers.

The above-mentioned layered porous material can be made by bending one of the opposing layered surfaces in advance in a predetermined direction as shown in Figure 2, or by making the adjacent layered surfaces a moisture absorbing surface and a moisture releasing surface as shown in Figure 3, allowing moisture to escape in the right angle direction. can be done.

Furthermore, the porous material has a moisture permeability of 1×10-g/1II-h-Hg or higher,
When heat is generated, the larger the temperature difference between the front and back surfaces, the more active the movement of moisture to the back side, so the heat conduction resistance is 2.0m-h.
C/kca1 or more is preferable, and in particular, in order to activate capillary flow and to retain the hygroscopic filler described later, the pore size distribution is widely dispersed between 0.1 and 100μ. Preferably, in the case of layered porous materials,
Those having a pore size distribution of 1 μ or more are suitable for moisture transfer.

Also, the thicker the material, the greater the water retention capacity, and when the back side is heated, the heat conduction to the front side becomes slower, making it easier to create temperature gradients and moisture content gradients, so at least 5 Tsuru or more is required.
Preferably, there should be 20 cranes or more.

In the present invention, the hygroscopic fillers include (1) deliquescent substances such as calcium chloride and lithium chloride, (2) water-soluble polymers such as diethylene glycol, triethylene glycol, glycerin, sodium polyacrylate, and PVA;
Inorganic hygroscopic materials such as bentonite, sepiolite, zeolite, activated alumina, xonotlite activated carbon, molecular sieves, etc., and water-insoluble polymeric hygroscopic materials such as grafted starch and isobutylene maleic anhydride may be used alone or in combination. .

The method of internally adding a hygroscopic filler to a porous material is to add the hygroscopic filler together with a binder and fibers and integrate the hygroscopic filler when depositing and integrating, or to obtain a porous material in advance and add a surfactant. A method of making a porous material hydrophilic, impregnating it with a hygroscopic filler dissolved in water, drying it, and adding it internally is taken.

The heating element (2) used in this embodiment is one using a metal heating wire, or one made of a breathable sheet coated with metal etching or conductive paint, and is appropriately treated to prevent moisture and leakage. Further, in order to make heating uniform, heat-uniforming sheets such as metal nets may be integrally laminated. The exothermic temperature is preferably 60℃
The temperature of the heating element may be set to ~140''C, but the higher the temperature, the more active the moisture release from the heating element becomes, so it only takes a short time.

In order to prevent moisture from being absorbed from the outside, the moisture exhaust door is installed so that it opens when heat is generated, and the method of generating heat is to allow moisture to be absorbed for a certain period of time, and when the moisture content of the moisture absorber increases, to generate heat for several hours. is effective, and may be controlled by a timer or temperature sensor.

In addition, the plate materials used for the moisture-insulating box (3) of the present invention include resin plates, metal plates, plywood with a PVC sheet attached, a polyester resin coating with a moisture-insulating layer on the surface or back layer, In addition, there are flash panels that are made by applying a low moisture permeability adhesive such as vinyl acetate resin to the opposing surfaces of two plywood boards and integrating them through crosspieces. It becomes a high box body (3). Box (
A front door (7) is screwed to the front opening of 3) so that it can be opened and closed freely, and a packing material (8) is arranged at the contact area between the front door (7) and the opening edge of the box body (3). It is set up.

In the embodiment shown in FIG. 1, a moisture absorption port (2) is provided on the bottom plate (9) of the box body (3), and a moisture absorption body (4) shown in FIG. 2 is attached via a dustproof filter αφ. ).

At the front of the casing α barrel that houses the moisture absorber (4), there is a moisture release door Ql that opens the moisture drainage surface of the moisture absorber (4) when heat is generated.
A moisture outlet @ is provided on the outside of the moisture release door αD, and the box body (3
) is used to release moisture from the louver 0 at the front of the architrave αa. A heating element (5) is installed on the moisture-draining surface of the moisture-absorbing body (4).

The second embodiment of the present invention has a moisture absorption port (2) on the side plate of the box (3).
), and a heating element (
5) and a water receptacle α9 that can freely draw out the drained moisture.
It has the advantage of not releasing moisture into the room. In this case as well, there is a moisture removal door Ql that can be opened and closed on the moisture removal surface.
) is screwed on.

Note that if the exposed area of the moisture absorbent body (4) is 100 M or more, preferably 500 to 200 M per 1 d of storage volume, a remarkable humidity control effect will be exhibited.

(Example 1) Humidity control section area 20 x 50 cm (1000 cI
A layered hygroscopic body (4) is made by impregnating 15% by weight of calcium chloride as a hygroscopic filler into a rock wool board (specific gravity 0.25, average pore diameter 55μ, porosity 90.6%) using phenolic resin as a binder. was created. This layered moisture absorber (4) has a thickness of 1 for guiding and reinforcing.
．． Three pieces were laminated with 5 mm plastic plates in between so that their laminated surfaces overlapped, and the pieces were housed in a casing with one end bent at 90°. Furthermore, a cable heater (length 1.5n+, 100V, 30W), which is a heating element (5), is integrated on one cross section, which is the moisture drainage surface, and a moisture absorption device ( 6) was produced. This was installed in a moisture-absorbing box (3) lined with vinyl chloride, and the following dehumidification experiment was conducted.

(Experimental Example 1) A humidity control/drying test was conducted with the outside air at a high temperature of 8° C. and 190% RH. As a comparative example, an experiment was conducted by installing a dehumidifying device using the Peltier method in the same box (3) as the box (3) used in Example 1.

When we measured the internal temperature change when the storage was empty, we found that
The experimental results shown in Figure 5 were obtained. That is, dehumidification by dry cooling is a method of dehumidifying by cooling dew condensation, and no decrease in temperature was observed, probably because frost had adhered to the cooling section. In the case of the device of the present invention, a significant decrease in humidity was observed,
An equilibrium state was reached after about 2.5 hours had passed.

(Experimental Example 2) Next, as shown in Table 1, clothes that had absorbed moisture were placed in a refrigerator, and a clothes dehumidification test was conducted. The box (3) used was a prototype storage box covered with vinyl chloride, as in Experimental Example 1. Figure 6 shows the internal temperature change.

Table 1: With the device of the present invention, the temperature inside the refrigerator decreased and the dehumidification of clothes was confirmed. On the other hand, in the comparative example, there was no change in the weight of the clothing, and the absolute humidity also remained almost unchanged.

Furthermore, since the absolute humidity of 5 mHg above corresponds to relative humidity of 50 to 60%, even if fur, etc. is wet due to snow in the winter, if it is stored in the box of the present invention, the humidity will be adjusted in the storage compartment, and the clothes will be permanently stored. It is suitable for storing items such as cameras and other items without damaging them.

〔effect〕

As mentioned above, the storage of the present invention consists of a moisture-absorbing box with moisture absorption ports provided on some of its four circumferential surfaces, and a continuous microscopic box made of a porous material formed by depositing fibers in layers. A hygroscopic body in which a hygroscopic filler is internally retained in the voids and a layered surface constituting the moisture absorption surface of the porous material is disposed toward the moisture absorption port, and a moisture drainage surface that is the other layered surface of the moisture absorbent body. It consists of a heating element attached to the inside of the box, and a moisture exhaust port formed on the periphery of the box toward the outside and communicating with the moisture drainage surface of the moisture absorbing body, so that the moisture inside the refrigerator can be removed. The moisture will be absorbed by the moisture absorbing body and released to the outside from the moisture exhaust port provided in the box body, resulting in a significant drop in the humidity inside the refrigerator. has the advantage of being very quiet. In addition, since it uses a heating element to release moisture, unlike dehumidification that uses the Peltier effect, there is no condensation or frost on the moisture release surface of the moisture absorbing element during winter or indoor cooling. In addition, it has the advantage of controlling the humidity inside the refrigerator even when the dehumidifying operation is not in progress, and it is possible to continuously and effectively control the humidity inside the refrigerator throughout the four seasons.

[Brief explanation of the drawing]

Fig. 1: Schematic vertical cross-sectional view of the first embodiment of the present invention Fig. 2: Schematic sectional view of the first embodiment of the moisture absorbing device used in the present invention Fig. 3: Schematic cross-sectional view of the first embodiment of the moisture absorption device used in the present invention Schematic sectional view of the second embodiment of the moisture absorbing device Fig. 4... Side sectional view of a portion of the second embodiment of the present invention Fig. 5... XX sectional view of Fig. 3 Nos. 6 and 7 Figure: Graph when comparing the present invention and the conventional example (1)...Four circumferential surfaces, (2)...Moisture absorption port, (3
)...Box body, (4)...Moisture absorbing body, (5)...
...Heating element, (7)...Front door, (8)...
Packing material, Q0...dust filter, (2)...drainage port, Q4)...architrave, α mark...casing,

Claims (1)

[Claims] (1) Hygroscopic filler is internally added to the continuous micro-voids of a moisture-absorbing box with moisture-absorbing ports on some of its four circumferential surfaces and a porous material formed by depositing fibers in layers. a moisture absorbent body with a layered surface constituting a moisture absorption surface of the porous material facing the moisture absorption port; a heating element attached to a moisture drainage surface that is the other layered surface of the moisture absorption body; and a box. A storage cabinet having a humidity control function, characterized by comprising a moisture exhaust port formed on the periphery of a box body facing outward from the body and communicating with a moisture exhaust surface of a moisture absorbent body.