JPH02233926A - Base material for humidity control - Google Patents

Abstract

PURPOSE:To control the humidity in the internal space by attaching a heat generator to or embedding same in the front and rear sides of a moisture absorber which has pores in it and carries the mixture absorbing filler in the pores of the porous object that interrupts the air flow. CONSTITUTION:A heat generator 2 and a heat generator 3 are attached to or embedded in the front and rear sides of a moisture absorber 1 to form a humidity controlling base material A. The moisture absorber 1 has continuous pores and carries a moisture absorbing filler in the pores of the porous object that interrupts the air flow. The humidity controlling base material A is installed so as to separate the internal space of a storage compartment 9 from outside. When the humidity in the compartment becomes higher than the set level, the outside heat generator 2 is caused to generate heat to reduce the humidity in the compartment, and, when the humidity in the compartment becomes too low, the inside heat generator 3 is caused to generate heat to release the humidity back into the compartment. The humidity in the compartment can thus be maintained in a certain range.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention is designed to dehumidify moisture in a room or a storage room by absorbing moisture in the room when the temperature is high. , when the indoor space is dry, SFj in the indoor space is forcibly released from the moisture absorbing body into the indoor space.
The present invention relates to a humidity control base material used in a humidity control device that performs A'IW.

(Prior art) A conventional dehumidifying device, as shown in Japanese Patent Application Laid-Open No. 159827/1983, circulates air through a filter made of corrugated ashesto sheet impregnated with a hygroscopic filler to adsorb moisture. It is also a large-scale project that involves exposing the filter to hot air and collecting the high-temperature air.
(hereinafter simply referred to as prior art).

(Problem to be Solved by the Invention) However, although the dehumidifying device according to the above-mentioned prior art has excellent dehumidifying ability, it is not suitable for dehumidifying closets, storage rooms, etc. because it circulates air and generates mechanical noise. It was inappropriate. Additionally, dehumidifiers are commercially available, but they are cumbersome as they cannot be recycled and must be replaced regularly, and asbestos itself, which is the material that makes up the sheet, is a carcinogen, so it can no longer be used. . Furthermore, there is also the problem that when the indoor space becomes overly dry, it is not possible to release moisture to control the humidity.

The present invention was invented in view of the above-mentioned problems, and
Moisture absorbed by the moisture absorption body from the front side or the back side can be released to either the front side or the back side by generating heat from either the heating element disposed on the front side or the back side as necessary. An object of the present invention is to provide a humidity control base material for use in a humidity control device that enables humidity control in a room space.

(Means for Achieving the Object) In order to achieve the above object, the present invention includes a porous body having continuous micro-voids and retaining a hygroscopic filler internally in the voids of a porous body that blocks airflow. It is characterized in that heating elements 2 and 3 are attached or embedded on both the front and back surfaces of the moisture absorbent body 1.

(Actions) The features of the present invention are as follows.

(2) Moisture absorbed by the hygroscopic body 1 from one side tends to move toward the side where the moisture content gradient and vapor pressure gradient within the hygroscopic body 1 are lower.

■At that time, since the hygroscopic filler is present in the minute voids, it exhibits moisture absorption capacity that is twice to several tens of times higher than that of porous materials that do not contain hygroscopic filler, and also minimizes the slight difference in moisture content. The difference in atmospheric pressure also promotes the movement of moisture, which spreads throughout the moisture absorbent body.

(2) Here, by causing the heating element 2 or 3 provided on the other surface to generate heat, moisture near the heating element 2 or 3 becomes water vapor and is released from the other surface.

(2) As a result, on the other side, the moisture content near the heating element 2 or 3 is reduced, and the hygroscopic filler near the heating element 2 or 3 is regenerated, making repeated use unnecessary.

■Attach the above humidity control base material to partition the inside and outside of the storage compartment,
If the temperature inside the refrigerator becomes higher than the set humidity, the heating element 2 on the outside of the refrigerator is made to generate heat to promote dehumidification inside the refrigerator, and if the humidity inside the refrigerator becomes low, the heating element 3 on the inside of the refrigerator is made to generate heat to remove moisture again. Release moisture into the refrigerator. In this way, the humidity inside the refrigerator is maintained within a certain humidity range.

(Example) Next, an example of the present invention will be described based on the accompanying drawings.

Fig. 1 is a perspective view of the humidity control substrate A according to the present invention viewed from an angle, and Fig. 2 is a perspective view of the humidity control substrate A according to the present invention.
JA? FIG. 2 is a perspective view of the first embodiment of the W device B as seen from an angle.

In this drawing, a humidity control base material A is constructed by attaching or embedding a heating element 2 and a heating element 3 on both the front and back surfaces of a moisture absorbent body 1, and the moisture absorbent body 1 has continuous micro voids. A hygroscopic filler is internally added and held in the voids of the porous body that blocks airflow.

Examples of the porous material having minute voids used in the humidity control substrate A of the present invention include (a) a material in which inorganic fibers such as rock wool and glass wool are deposited and integrated using a binder; (b) Non-woven fabric or the above-mentioned fiberboards are laminated and integrated to a desired thickness; (C) Single or composite inorganic materials such as gypsum, cement, calcium silicate, and ceramic sintered bodies are suitable.

Furthermore, the porous material has a transmittance of IXIO-'g/m-h-mmllg
Therefore, when heat is generated, the larger the humidity difference between the front and back surfaces of the humidity control substrate A, the more active the movement of moisture to the back side, so the thermal conduction resistance is 2.0 m - h ・"C/kca1 or more. In particular, in order to activate capillary flow and to retain the hygroscopic filler described later, it is preferable that the pore size distribution is broadly divided between 0.1 and 100μ. In particular, those having a pore size distribution of 10μ or more are suitable for moisture transfer.

In addition, the thicker the material, the greater the water retention capacity, and when the back side is heated, heat conduction to the front side is slowed down, making it easier to create temperature and moisture content gradients, so at least 5 mm or more is required. Preferably, the number of cylinders is 20 or more.

Hygroscopic fillers used in the present invention 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, and (2) bentonite and wollast. Inorganic hygroscopic materials such as night, Seviolite, zeolite, activated alumina, xonotlite, activated carbon, molecular sieves, etc., water-insoluble polymeric hygroscopic materials such as grafted starch, isobutylene maleic anhydride, etc. alone or mixtures thereof, etc. be.

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 then adding 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. In the case of an inorganic material, cement or gypsum, water, and a hygroscopic filler may be kneaded together.

Further, the heating elements 2 and 3 used in this embodiment are both moisture-proof and electrically leakage-proof, using metal heating wires, metal etching or conductive paint applied to breathable sheets, etc. Further, in order to make heating uniform, a heat-uniforming sheet such as a metal net may be integrally laminated. The heat generation temperature is sufficient if the material temperature is 5°C or more higher than room temperature, and preferably the heating element temperature should be set so that the material temperature is 40 to 140°C, but the higher the temperature, the more it depends on the heating element. Moisture release becomes active and short-term dehumidification is achieved. An effective way to generate heat is to allow the absorbent to absorb moisture for a certain period of time, and then when the moisture content of the absorbent increases, the heating element is allowed to generate heat for several minutes to several hours. It may be controlled by a rate sensor.

Further, the casing 4 is preferably made of a resin plate, a metal plate, etc., which is moisture-impermeable and water-resistant, and has good thermal conductivity so that dew condensation is likely to occur.

The moisture absorbent body 1 is attached to the casing 4 so that a space 5 is formed at the rear and lower part thereof, and a removable water retaining device 7 is disposed at the lower part.

In the water holding device 6, the moisture adsorbed on the moisture absorbing body 1 evaporates due to the heat generated by the heating element 2, and this lightly emitted moisture condenses inside the casing 4, and the condensed water that flows down the inner wall of the casing 4 is stored. be able to. The condensed water collected in the water holding device 6 is used for humidifying the room. In addition, if a large amount of humidification is required, water may be replenished into the water holding device 6 from outside.

In this case, a moisture content sensor 7a is provided to detect the equilibrium moisture content of the moisture absorbent body 1 according to the relative humidity in the room, and the moisture content sensor 7a detects the equilibrium moisture content of the moisture absorbent body 1.
When the relative humidity in the room Z becomes equal to or higher than the moisture content corresponding to the set humidity ), and when the indoor relative humidity falls below the set humidity Y (for example, 45% RH), the heating element 3 on the indoor side is turned on to release moisture to the indoor side, and between the set temperatures A and B, both Automatic driving will become possible if the system is controlled so that both are turned off.

Furthermore, FIG. 3 shows a second embodiment of the humidity control device B using the humidity control base material A according to the present invention. In this case, a ventilation fan 8 is attached to the casing 4 and the heating element 2 By selectively turning the fan during heating, moisture can be forcibly released to the outside of the casing 4, thereby quickly dehumidifying the casing.

Further, a humidity sensor 7b is installed on the indoor side, and whereas in the first embodiment the moisture content is controlled by the moisture content sensor 7a, in this case the humidity sensor 7b is used for control. Note that, for example, the moisture content sensor 7a may be used to detect high temperatures, and the humidity sensor 7b may be used to detect low temperatures.

Furthermore, FIG. 4 shows a case where the humidity control device B according to the second embodiment of FIG. 3 is used in the storage box body 9.

As is clear from FIG. 4, the side plate 10 of the storage box body 9
A moisture absorption port 11 is provided in the third
The humidity control device B shown in the figure is placed with the moisture absorbent body 1 facing toward the inside of the storage room.
The casing 4 and fan 5 are attached facing outward of the storage box body 9. In this case, the exposed area of the moisture absorbent body 1 is 100 ca or more, preferably 500 ca or more per 1M volume of the storage box body.
~2000c! If there is a, it shows a remarkable effect. In addition, 13
is a door.

(Experiment example) Felt soaked in 20-L% calcium chloride as a hygroscopic filler was laminated, and a cable heater (100v, 22.5w) was placed on the back side of the 50 x 50 x 150 mm hygroscopic body.
The same cable heater was attached to the other side. A moisture content sensor is installed inside the moisture absorber, and a humidity sensor is installed on the surface side (indoor side) of the moisture absorber, and the humidity on the indoor side is 60%.
If the moisture content of the moisture absorber rises in response to the RH or higher, the moisture content segisa will detect this and turn on the cable heater on the back of the moisture absorber. W4
When the humidity drops below 5%RH, the quality sensor attached to the surface of the moisture absorber detects this and the cable heater on the surface of the moisture absorber turns on.
I changed it to N.

When this device was placed in a 0.4-capacity desiccator at 25° C. and 80% atmosphere, 10 ml of water accumulated in the water retention device in one day. Furthermore, when a dehumidifying device using the humidity control base material of the present invention was placed in an atmosphere of 25°C and 30% with water accumulated in the water holding device, 5 volumes of water disappeared in a day. .

In both cases, the internal temperature is within the range of 45 to 60% RH.
It has been found that if the moisture absorbing area of the moisture absorbing body is scaled up by about 10 times, sufficient humidity control ability can be developed even in rooms such as closets.

(Effect of the invention) However, the 2m according to the present invention? According to the humidity control device using the W base material, when the indoor temperature becomes high according to the relative humidity, the moisture absorbing body absorbs the indoor moisture from the indoor side (front surface), releases the moisture from the back side, and When the inside of the room becomes too dry, it takes in the moisture that has been taken into the moisture absorber as well as the moisture on the back side, and releases the missing moisture into the room, so unlike conventional dehumidifiers, it can control the humidity in the room. As a result, fur,
It is effective as a storage/repository for books, antiques, and cameras, and as an indoor environment maintenance device. In addition, it exhibits good humidity control properties for a long period of time without producing any unpleasant mechanical noise.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a humidity control device using a humidity control base material according to the present invention, and FIG. 2 is a first embodiment of a humidity control device using a humidity control base material according to the present invention. FIG. 3 is a perspective view of the second embodiment of the humidity control device using the humidity control base material according to the present invention, seen from an oblique direction. FIG. 4 is a perspective view of FIG. FIG. 7 is a schematic explanatory diagram schematically showing a state in which the humidity control device according to the second embodiment is used in a storage box body. 1...Moisture absorbing body, 2.3...Heating element, 4
...Casing, 5...Space part, 6.
...Water retention device, 7a ... Moisture content sensor, 7b ... Humidity sensor, 8 ... Ventilation fan, 9 ... Storage box Body, 10...
Side plate, 11...Moisture absorption port, 12...Dust filter, l3...Door, A...Moisture control base material, B...・Humidity control device.

Claims (1)

[Claims] (1) A heating element is attached or embedded on both the front and back surfaces of a hygroscopic body, which has a continuous micro-void portion and holds a hygroscopic filler internally in the void portion of a porous body that blocks airflow. A humidity control base material characterized by: