JPH01297125A - Dehumidification device - Google Patents

Abstract

PURPOSE:To regenerate a moisture-absorbing material in quick response to its performance, and simplify and make compact a device by measuring a resistance value between a plurality of conductors arranged in the moisture-absorbing material to directly detect its moisture content and regenerating the moisture-absorbing material in accordance with the detected moisture content. CONSTITUTION:Conductive pins 31 are inserted at a specified interval in a moisture- absorbing material 1 consisting of hygroscopic filler such as calcium chloride which is internally added and held in the microvoids of a porous material. If the moisture level of the front (the side facing the room) is high, the moisture taken in the moisture- absorbing material 1 from the front moves to the back and is released from the back of the moisture-absorbing material 1 as a vapor following the heat generation of a heat-generating element 2. At that time, if a resistance value between the conductive pins 31 is measured, and the resistance value reaches less than a specified value due to the increase in a moisture content of the moisture-absorbing material 1, a detection means detects this and a control means controls the energization to the heat-generating element 2. The evaporated vapor attaches to the internal surface of an extended section 51 of a covering member 5 to cause a condensation, and is recovered to a water tray 6 below.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a dehumidification device used in automatically operated dehumidification equipment.

(Prior Art) Conventionally used dehumidification devices include a hygroscopic body made of corrugated paper or the like impregnated with a hygroscopic agent that can be heated and regenerated, a heating means for regenerating the hygroscopic body, and a humidity sensor for detecting indoor humidity. When the humidity in the room becomes high, the humidity sensor detects the high humidity, starts operating the humidity control equipment, causes the moisture absorbent to absorb moisture, and heats the moisture absorbent to regenerate it. .

(Problem to be Solved by the Invention) However, since air passes through the hygroscopic body in the above dehumidifying device, if the detection means is attached directly to the hygroscopic body, the detection means will be exposed to the airflow, which will affect air conditioning. Due to moisture or condensation, the response becomes poor and the variation becomes large.

For this reason, conventional dehumidifiers that use moisture absorbers require a separate humidity sensor to sense indoor humidity and operate automatically, which poses the problem of making the device complex and large. .

(Object of the Invention) In view of the above, an object of the present invention is to provide a dehumidifying device that regenerates a moisture absorbent according to its water content, thereby dehumidifying a room.

(Means for solving the problem) In order to achieve this object, the present invention directly detects and adjusts the water content in the hygroscopic body, thereby regenerating the hygroscopic body and absorbing indoor moisture. .

Specifically, the invention of claim (1) provides a hygroscopic body, such as a hygroscopic body formed by retaining a hygroscopic filler internally in the pores of a porous body that has continuous fine pores and blocks airflow. a heating element mounted in contact with or buried in the heating element; a cover member covering the moisture absorbing element so as to provide a space on the side of the heating element;
A plurality of conductors disposed inside the moisture absorbing body, a detection means for measuring the resistance value between these conductors to detect the moisture content in the moisture absorbing body, and control for energizing the heating element when the moisture content is equal to or higher than a predetermined value. The structure consists of means.

In addition, the invention of claim 2 provides a hygroscopic body having continuous fine voids and retaining a hygroscopic filler internally in the voids of a porous body that blocks airflow; A cover member that covers the moisture absorbent body so as to provide a space, a suction means that reduces the pressure in the space, a plurality of conductors arranged in the moisture absorbent body, and a resistance value between these conductors that is made of aluminum.
11, and a control means for energizing the suction means when the water content is equal to or higher than a predetermined value.

(Function) With the above configuration, the dehumidifying device configured according to the invention of claim (1) or (2) is energized to the heating element or suction means when the resistance value between the conductors in the moisture absorption body becomes below a specific value. When placed indoors in this way, the following phenomenon occurs.

(2) Since air does not substantially flow through the hygroscopic body, the absorbed moisture moves to the side where the moisture content and vapor pressure gradient within the hygroscopic body are lower, unaffected by indoor airflow.

■ In this case, the hygroscopic material retains the hygroscopic filler internally within the micropores, so it exhibits several to tens of times the hygroscopic ability compared to a porous material that does not contain the hygroscopic filler. At the same time, moisture movement occurs even if there is a slight difference in moisture content or vapor pressure.

(2) Therefore, when the surface side (indoor side) is highly humid, the moisture taken in from the surface side moves to the back side and spreads over the entire moisture absorbent body.

(2) When the water content of the moisture absorbent increases and the resistance value between the conductors becomes less than a predetermined value, the detection means detects this, and the control means energizes the regeneration means, which is a heating element or suction means.

(2) The regenerating means converts moisture near the back surface of the moisture absorbent body into water vapor and releases it from the back surface of the moisture absorbent body, so that the moisture content near the back surface decreases and the hygroscopic filler near the back surface is regenerated.

■ When the regeneration means is operated for a certain period of time, the release of moisture from the back side of the moisture absorbent body progresses, and the moisture on the front side moves to the back side.
As a result, the hygroscopic filler on the surface side of the hygroscopic body is also regenerated and absorbs moisture again.

As described above, the hygroscopic body absorbs moisture as the indoor relative humidity increases, and the hygroscopic body is regenerated as the moisture content of the hygroscopic body increases. By repeating these steps, the relative humidity in the room decreases, and when the hygroscopic body reaches an equilibrium state with a predetermined moisture content or less, it stops absorbing moisture.

(Example) Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows a moisture absorbent body 1 and a heating element 2 attached to the back surface of the moisture absorbent body 1 in an embodiment of the dehumidification structure A according to the invention of claim (1).

The hygroscopic body 1 is made of a porous body which has continuous fine voids and which substantially prevents air from circulating and blocks airflow in the room, and holds a hygroscopic filler internally within the voids.

The porous material may be any material as long as it does not easily break or deform due to moisture absorption.Specifically, it may include: - Rock wool board or paper laminated and integrated to a specified thickness, - Plaster, cement, silica, etc. Inorganic bodies such as calcium chloride, ceramic sintered bodies, etc., Porous bodies such as polyvinyl chloride sheets whose pore diameters are adjusted by foaming, polyolefin sheets whose pore diameters are adjusted by stretching, or fiberboards whose pore diameters are adjusted by compression, either alone or in combination. Moisture moves through capillary flow and pressure differences, such as in the body, and net-like or honeycomb-like objects are removed because wind passes through them.

In addition, the porous material has a moisture permeability of 1 x 10-3 g/m-h*
mmHg or more, and the thermal conduction resistance is 2.0 m to increase the temperature difference between the front and back surfaces and activate moisture movement to the back surface.
-h・'C/kcaN or higher is preferable, and the pore size distribution is widely dispersed between 0.1 and 100 tt in order to activate capillary flow and efficiently retain the hygroscopic filler. Particularly preferred.

Furthermore, regarding the plate thickness of the porous body, the larger the plate thickness, the more
It is necessary to have a thickness of 5 mm or more, and more preferably 20 mm or more, because the water retention capacity increases and the heat conduction to the front side becomes slower when the back side is heated, making it easier to obtain a temperature gradient and a water content gradient.

The moisture-absorbing filler that is retained internally in the porous body is as follows:
■Deliquescent substances such as calcium chloride and lithium chloride, ■Water-soluble polymers such as diethylene glycol, triethylene glycol, glycerin, sodium polyacrylate, and PVA, ■bentonite, seviolite, zeolite, activated alumina, xonotlite, activated carbon, and molecular sieves. Inorganic moisture absorbing materials such as ■grafted starch,
A single water-insoluble polymeric moisture absorbing material such as isobutylene maleic anhydride or a mixture thereof may be used.

As a method for internally adding a hygroscopic filler to a porous body, the porous body after molding is impregnated with a dissolved hygroscopic filler, or the hygroscopic filler is kneaded and hardened together with the raw material of the porous body.

A bent heating element 2 is attached to the back side of the moisture absorbing body 1, so that moisture taken into the moisture absorbing body 1 from the front side moves to the back side, and as the heating element generates heat. Water vapor is released from the back side of the moisture absorbent body. As the heating element 2, any material that does not hinder moisture release from the moisture absorbing element 1 can be used as appropriate, and in addition to the metal heating wire that has been subjected to moisture-proofing and electric leakage treatment as in this embodiment, a metal-etched or air-permeable sheet may be used. It may also be a material coated with conductive paint and subjected to moisture-proofing and electrical leakage treatment. It is preferable to use an integrally laminated heat-uniforming sheet such as a metal net as the heating element, since the moisture absorbing body 1 can be heated uniformly.

The heat generation temperature of the heating element 2 may be set so that the temperature of the moisture absorbent body 1 is 5 degrees Celsius or more higher than the outdoor temperature, and the temperature of the moisture absorbent body 1 is set to be between 40 degrees Celsius and 160 degrees Celsius. It is preferable to do so.

Incidentally, conductive pins 31 of a detection means 3 for detecting the water content inside the moisture absorbent body 3, which will be described later, are inserted into the inside of the moisture absorbent body 1 on the back surface side at a predetermined interval.

The moisture absorbing body 1 to which the heating element 2 and the conductive pin 31 are attached in this manner is covered with a rectangular cover member 5 on its circumferential side. This cover member 5 has an extension part 51 extending toward the back surface side, forming a space part 52, and removably holds a water tray 6 with an open top below the moisture absorbent body 1 inside thereof. are doing. By doing so, the water vapor evaporated from the back surface of the moisture absorbent body 2 adheres to the inner surface of the extending portion 51 of the cover member 5, forms dew condensation, and is collected by the water receiving tray 6 located below. The evaporated water vapor can be released naturally to the outside by opening a door (not shown) attached to the cover member 5 so as to be openable or closable, or it can be forced to be released to the outside by using an appropriate ventilation fan (not shown). You can.

FIG. 2(A) shows a conductive bottle 3 which is a detection means 3.
2 shows a resistance value δP1 constant circuit for measuring the resistance value between The control circuit is shown. The above-mentioned resistance value measuring circuit is a bridge circuit connected to an AC power supply 32 via a transformer 33, and the potential difference vo between contacts A and B generated by resistors Ro, R1°R2 and variable resistors VR2, VR3 A potential (1) determined by the variable resistor VRI is input to the comparator 41.

This potential■! is compared with a reference potential v2 set by a variable resistor VR4, and if the potential v1 is greater than the potential v2, a signal S is output from the comparator 41. Comparator 41
The signal S output from is applied to the base of the transistor 42 via the resistor R3, and when the transistor 42 is turned on and off, the excitation of the relay 43 for energizing the heating element connected to the stabilizing capacitor 44 is turned on. , is turned off. When the relay 43 is turned on or off, the power to the heating element 2 is turned on.
It will be turned off.

In this case, Ro
It is necessary to determine the resistance value of For example, the porous body forming the moisture absorbent body 1 is a rock wool board (specific gravity: 0.25.
When the indoor humidity is set to 50%RH when the average pore diameter is 55μ and the porosity is 90.6%, Ro
Reduce the resistance value to 2500Ω or less and set the indoor humidity to 90
When setting it to %RH, the resistance value of Ro is set to 1250Ω or less. In addition, in the above resistance value measuring circuit, the resistance values of resistors R1 and R2 are 5Ω, variable resistors VRI, V
The variable maximum resistance value of H2 and VH2 is IKΩ, and R
When setting o-2500Ω, VR+=150Ω, V
H2-8B5Ω, yR3=1000Ω, R
To set o-1250Ω, set VR+-150,
VH2-916Ω, VH2-500Ω, or VH2-
400Ω, VH2-500Ω, or VH2-400Ω,
VH2-600Ω or VH2-390Ω.

It is recommended to set it to VH2-700Ω.

In addition, when the porous body is rock wool, the moisture content of the moisture absorbing body 1 is approximately 1.5 VoN% when the setting is such that the electricity is turned on to the heating element 2 when the resistance value of Ro becomes 2500Ω or less.
In addition, when the porous body is a gypsum body, the water content of the moisture absorbing body 1 is approximately 27Vo9% when the electricity is turned on to the heating element 2 when the resistance value of Ro becomes 100Ω or less.
It is.

In this way, depending on the type of porous body forming the moisture absorbent body 1,
Since the moisture content of the hygroscopic body 1 with respect to the resistance value of Ro is different,
It is necessary to correct the set resistance value of Ro depending on the type of porous body.

FIG. 3 shows a moisture absorbent body 1 in an embodiment of a dehumidification structure A' according to the invention of claim 2, and a suction means attached to the back side of this moisture absorbent body.

As the porous body of the moisture absorbing body 1, the same one as in the first invention can be used, but in this example, it is made of Portland cement: bentonite: CaC112 diethylene glycol: water - 350: 700: 105: 105
: The above materials are kneaded and molded in a weight ratio of 500.

The circumferential side of the moisture absorbent body 1 is covered with a cover member 5 made of acrylic resin.
The cover member 5 forms a space 52 by an extending portion 51 extending toward the back side. The cover member 5 is provided with a circular moisture drainage opening 53, into which one end of a moisture drainage pipe 54 is fitted.

Further, the other end of this pipe 54 is connected to a vacuum pump 7 which is a suction means, and when this vacuum pump 7 is operated, air in the space 52 between the moisture absorbing body 1 and the cover member 5 is drawn through the pipe 54. is suctioned and the pressure becomes reduced.

This dehumidification structure A' has a detection means 3 and a control means 4 similar to the invention of claim (1), and when the relay 43 is turned on and off, the motor of the vacuum pump 7 is energized. is turned on and off. By doing so, when the resistance value between the conductive bottles 31 becomes equal to or less than a predetermined value, the motor of the vacuum pump 7 is operated to reduce the pressure inside the extension part 51 of the cover member 5, and accordingly, the moisture absorbent 1 The moisture inside is released from the back side of the moisture absorbent body 1, and the released moisture is discharged to the outside of the dehumidification structure A' through the pipe 54. In this case, when setting the indoor humidity to 50% RH, the resistance value of Ro is set to 2500Ω or less, and the space 52 is 50% RH.
It is recommended to reduce the pressure to mHg.

(Experimental Example) Next, an experimental example of the dehumidifying structure A according to the invention of claim (1) will be shown. Rock wool board with phenolic resin binder (specific gravity 0.25, average pore diameter 55μ, porosity 90
．． 6%) to a size of 50 mm x 150 mm x 150 mm, and this rock wool board is impregnated with 20% by weight of calcium chloride, which is a hygroscopic filler, to form a moisture absorbent body 1. On the back side of this moisture absorbent body 1, a length that is a heating element 2 is attached. 1.5m
, a 100 V, 45 W cable heater was attached, and two 20 mm long stainless steel conductive pins 31 were buried in the bottom of the moisture absorber 2, so that the resistance value between these conductive pins 31 became 2500 Ω or less. A dehumidification structure A was prepared in which a detection means 3 and a control means 4 were set so that the cable heater was energized at certain times. Then, when this dehumidifying structure A was left in an atmosphere with a relative humidity of 90%, the cable heater was intermittently energized after one hour, and the water vapor released from the moisture absorbing body 1 was transferred to the extended portion 51 of the cover member etc. It adheres to the inner surface, condenses and falls, and 84g of water can be collected per day in the water tray 6, which increases the room temperature by 50%.
I was able to keep it at H.

(Effects of the Invention) As explained above, according to the dehumidifying structure of the present invention as set forth in claims (1) and (2), the moisture absorbing body absorbs moisture when the indoor relative humidity increases, and the moisture absorbing body has a high water content. , the regeneration means starts operating, and when the moisture content of the moisture absorber becomes low, it stops regeneration and starts absorbing moisture. Therefore, by setting the resistance value between the conductors and directly adjusting the moisture content of the moisture absorption body, indoor can be dehumidified. Therefore, responsiveness to the capacity of the moisture absorber is good, and there is no need to attach a separate humidity sensor, making it possible to simplify and downsize the device.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of the dehumidifying structure according to the invention of claim (1), and FIG. 2 (A) is a resistance value measuring circuit for measuring the resistance value between the conductive pins in the dehumidifying structure. , FIG. 2(B) is a control circuit for turning on and off electricity to the heating element in the dehumidifying structure, and FIG. 3 is a perspective view of an embodiment of the dehumidifying structure according to the invention of claim (2). be. A... Dehumidification structure, ]... Moisture absorber, 2... Heat generating element, 3... Detection means, 4... Control means, 5... Cover member, 7... Vacuum pump, 31... conductive bottle,
54...pipe. Patent applicant: Daiken Kogyo Co., Ltd.
Patent Attorney Former 1) Osamu Hiroyo
People Patent Attorney Tomoaki Numami “-Strive Figure 3

Claims (2)

[Claims] (1) A hygroscopic body formed by holding a hygroscopic filler internally in the pores of a porous body that has continuous micro-voids and blocks airflow, and a hygroscopic body that is attached to the hygroscopic body by being in contact with or embedded in the hygroscopic body. A heating element, a cover member that covers the hygroscopic body so as to provide a space on the side of the hygroscopic body, a plurality of conductors arranged inside the hygroscopic body, and a resistance value between these conductors is measured to determine the water content in the hygroscopic body. 1. A dehumidifying device comprising: a detection means for detecting water content; and a control means for energizing a heating element when the water content is equal to or higher than a predetermined value. (2) A hygroscopic body comprising a porous body having continuous microscopic voids and retaining a hygroscopic filler internally within the voids of a porous body that blocks airflow; A cover member that covers the moisture absorbent body, a suction means that reduces the pressure in the space, a plurality of conductors arranged within the moisture absorbent body, and a detection method that measures the resistance value between these conductors to detect the water content in the moisture absorbent body. and a control means for energizing the suction means when the water content is equal to or higher than a predetermined value.