JPH01310716A - Dehumidifier - Google Patents

Abstract

PURPOSE:To detect humidity with high precision by a simple and economical structure by stopping electric conduction to a heat generating body on one side of a humidity absorbing body when a temperature sensor attached to the humidity absorbing body detects a prescribed temperature, and setting a timer to start electric conduction again after a prescribed period since the electric conduction is stopped. CONSTITUTION:A humidity absorbing body 1 formed by impregnation of humidity absorptive filler such as calcium chloride in a porous body such as a rock wool and a heat-generating body 2 are integrally combined and a temperature sensor 3 is installed on the porous body. Power is conducted to the heat-generating body 2 so as to dissipate humidity which is absorbed in the humidity absorbing body 1, and when the water retaining rate of humidity absorbing body 1 becomes low, the temperature of the humidity absorbing body 1 rises to high value. When the temperature reaches a prescribed temperature, the temperature sensor 3 works and stops the power conduction to the heat-generating body 2. The humidity absorbing body 1 in a condition of low water absorbing rate gradually absorbs humidity in a room so as to dehumidify the room. A period during which, with power conduction being stopped, the humidity absorbing body 1 continuously absorbing humidity until the water retaining rate reaches a prescribed value is set previously by a timer 4, and when the prescribed period is passed, power is conducted again to the heat-generating body 2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a novel dehumidification device that can automatically dehumidify a room.

[Prior art and its problems]

Japanese Patent Application No. Sho 61-185026, which is a prior art to the present invention, describes a device in which a heat generating body is integrated with a moisture absorbing body. This material had a release speed several to several ten times faster than the moisture absorption speed. Therefore, it was required to heat the heating element intermittently for a short period of time, and an attempt was made to connect an electrical resistance type moisture content sensor.

In other words, as the moisture content of the moisture absorber increases, the resistance decreases,
We tried a control method in which the heating element is turned on and turned off when the moisture content reaches a predetermined level, but in the AC electric field, the frequency became unstable due to ionization of the hygroscopic filler due to electrolysis, and the set value and detection results were There was some variation. Therefore, if the frequency is converted to a high frequency using a frequency converter, the detection accuracy improves, but there is a drawback that the device is expensive and large-scale.

[Purpose of the invention]

The present invention was made in view of the drawbacks of the conventional example, and
The objective is to provide a dehumidifier equipped with a detection device that is simple and inexpensive, yet capable of extremely high-precision detection.

[Technical Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides: (1) a hygroscopic material in which a hygroscopic filler is internally retained in the voids of a porous body having continuous micro voids; A heating element that does not hinder moisture release is attached to one side of (1), and a temperature sensor (3) is provided on the porous body, and the temperature sensor (3) detects when a predetermined temperature has been reached.
A timer (4) is connected to the heat generating element (2), which detects the current at the timer, stops the power supply to the heat generating element (2), and restarts the power supply after a predetermined period of time has elapsed after the power supply is stopped.

; is adopted as a technical means.

[For production]

■ Integrate the heating element (2) with the moisture absorber (1), and
Since heating and moisture is released from one side of the hygroscopic body (1), when the moisture content of the hygroscopic body (1) is high, evaporation occurs actively. the result,
The heat of vaporization is taken away and the temperature of the moisture absorbent (1) does not rise above a certain level. Therefore, the heating element (2) is continuously energized.

■ However, due to continuous moisture release, the hygroscopic body (1) has a low moisture content, and when the evaporation of water decreases, the amount of heat taken away as heat of vaporization decreases, and the amount of heat released decreases, causing the hygroscopic body (1) to When the temperature rises, it becomes high temperature.

■ When the moisture absorbing body (1) reaches a predetermined temperature, the temperature sensor detects this and stops the power supply to the heating element (2).

■ In this state, the moisture absorber has a low moisture content, so it gradually absorbs moisture from the room and dehumidifies the room.

(2) The time it takes for the moisture absorbing ability of the moisture absorbing body (1) to decline varies depending on its size and indoor humidity conditions, but it takes several hours to a day even under high humidity conditions of 95% RH.

On the other hand, several minutes to an hour is sufficient for the moisture absorbent (1) to have a low moisture content and be activated by heating.

Once the moisture content is below a predetermined value, there is no need to heat it any further.

Using the above properties, the timer (4) is used to set the time for the moisture absorbent (1) to absorb moisture.

■ When the set time has elapsed, the heating element (2) is energized.

The power to the heating element (2) is turned off when the moisture absorbing body (1) reaches a predetermined temperature, and after the power is turned off, the timer (4) is turned off.
) starts operating.

[Example] The invention will now be described in detail with reference to illustrated embodiments.

The moisture-absorbing and desorbing material of the present invention is a porous body having minute voids that substantially prevents air flow and blocks air flow, such as:
Inorganic materials such as cement, calcium silicate, ceramic sintered bodies, and rock wool.

Materials made by depositing and integrating inorganic fibers such as glass wool into layers; ■Polyvinyl chloride sheets with pore size adjusted by foaming; Polyolefin sheets with pore size adjusted by stretching; Paper with pore size adjusted by coating synthetic resin; pore size adjusted by compression. A single or composite porous body made by laminating and integrating fiberboard etc. prepared with
It does not deform. Furthermore, the porous material has a moisture permeability of I
Xl0-' g 7m -h -mmtlg
In order to prevent dew condensation on the surface and in consideration of heat insulation properties, it is preferable that the heat conduction resistance is 2.0 m -h ・"C/kcal or more. In particular, in order to activate capillary flow, , the pore size distribution is 0.0 to retain the hygroscopic filler described later.
Preferably, the particles are dispersed between 1 and 100μ. or,
The thicker the material, the greater the water retention capacity of the porous material = 4-, and the slower the heat conduction to the front side when heating the back side.
Easy to increase temperature gradient and moisture content gradient.

Therefore, it is necessary to have a material thickness of 5 or more, preferably 20111 or more, and a plurality of thin porous materials are used in a stacked manner.

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 absorbers such as bentonandosepiolite, zeolite, activated alumina, xonotlite, activated carbon, molecular sieves, etc. Water-insoluble polymeric moisture absorbing materials such as W'74, (2) grafted starch, and isobutylene maleic anhydride may be used alone or in mixtures thereof.

As a method for internally adding a hygroscopic filler to a porous body, the hygroscopic filler is melted and impregnated into the porous body, or the hygroscopic filler is kneaded with the raw material of the porous body during molding and then hardened. In particular, a molded product made by mixing an inorganic moisture absorbing material such as bentonite with water, such as calcium chloride or diethylene glycol, and kneading it with cement or gypsum is preferable, as it has little exudation of the hygroscopic filler and has appropriate moisture permeability.

The heating element (2) of the present invention is, for example, a planar heating element or cable heater in which metal etching or conductive paint is attached to a breathable sheet through which moisture can pass, and one side (space side) of the moisture absorbing element ('') is used. It is embedded in or attached to and integrated with the Then, moisture-proofing and electric leakage prevention treatment may be applied as appropriate, and a heat-uniforming sheet such as a wire mesh may be integrally laminated to uniformize heating. In addition, an infrared heater, etc. is used as the heating element (2), and a moisture absorbing element (1) is used.
It is also possible to heat the back surface of the moisture absorbent body (1) by leaving some space on the back surface of the moisture absorbent body (1). FIG. 1 shows an example of the embodiment of the present invention, in which a moisture absorbing body (1) is disposed in the front opening (6) of a case (5), and the heating element is placed on the back side of the moisture absorbing body (1). (2) is arranged and controlled by a timer (4).

A moisture release space (8) is provided between the back surface of the moisture absorbent body (1) and the back surface of the case (5). Furthermore, the case (
A water receptacle (7) is installed at the bottom of the case (5), so that moisture released from the back of the moisture absorber (1) condenses and accumulates on the inner surface of the case (5). A temperature sensor (3) is embedded in the moisture absorbent body (1) and accurately measures the temperature of the moisture absorbent body (1).

The second part is an example of a control circuit used in the present invention, including ACl,
Thermo controller (SC), delay timer (DT), relay (R), timer (4) between OOV power lines
, a transformer (TF), and a solid state relay (SSR) are connected in parallel, and the solid state relay (SSR) has an output connector ((J
) are connected in series and the heating element is connected to this output connector.
(CN). Further, a temperature sensor (3) is connected to the thermocontroller <SC> and detects the temperature of the moisture absorbent body (11).

A snap switch (SS) is connected in series to the thermocontroller (SC) to turn the thermocontroller (SC) on and off. or,
Pilot lamp (F) on thermo controller (SC)
LY) are connected in parallel, and the thermo controller (SC)
It is designed to display whether it is on or off. Similarly, a pilot lamp (PI, 2) is connected in parallel to the timer (4) to display whether the timer (4) is on or off.

Then, the heating element (2) is energized to heat the back surface of the moisture radiator (11) and radiate moisture from there, but the moisture absorber (1)
When the water content is high, evaporation occurs actively, so the heat of vaporization is taken away, and the temperature of the moisture absorbing body (1) does not rise above the set value. However, as a result of continuous moisture release, the hygroscopic body (1) has a low moisture content, and as moisture evaporates less, the heat of vaporization due to moisture evaporation is released less, and the hygroscopic body (1) becomes hot. .

When the moisture absorber (11) reaches a predetermined temperature, the temperature sensor (3)
is activated, the solid state relay (SSR) is turned off, and the power to the heating element (11) is stopped. In this state, the moisture absorber (1) has a low moisture content, so it gradually takes in moisture from the room and dehumidifies the room. do.

The time for the moisture absorbing ability of the moisture absorbing body (1) to decline varies depending on its size and indoor humidity condition, but it takes from several hours to about one day even in a high humidity environment of 95% R11.

On the other hand, a few minutes to an hour is sufficient for the moisture absorbing body (fl) to become low in moisture content due to moisture dissipation due to the energization of the heating element (2) and to be activated, and if the moisture content falls below a predetermined moisture content, heating is continued. Since there is no need to do so, the power supply is stopped as described above.

Subsequently, if moisture absorption continues in the above-described state in which the electricity is not supplied, the moisture content in the moisture absorbing body (1) gradually increases, although the indoor humidity decreases. Therefore, the time required for the moisture content of the moisture absorbing body (1) to reach a predetermined value is set in advance using a timer (4), and when the set time has elapsed, the heating element (2) is reused.
) starts energizing.

Thereafter, repeat this to achieve effective continuous moisture release.

(Example 1) Ronfural board impregnated with 40% calcium chloride as a moisture absorption filler, specific gravity 0.25, average pore diameter 55 μ, porosity 90.6%, 50 x 150 x 150 **
Make a hygroscopic body (11), and attach a length of 50 mm on one side of the hygroscopic body (11).
The dehumidifier shown in FIG. 1 was assembled by integrating a cable heater (2) of 100 V/cm. Temperature sensor (
3) includes thermisters, thermocouples, resistance temperature detectors, etc.
Here, a thermocouple was attached to the heater (2) so that the heater temperature could be detected. Exothermic temperature is 50-160°C
The temperature sensor (3) was set to detect the temperature.

It is sufficient that the timer (4) can be set between 2 and 24 hours, and here it is fixed at 5 to 10 hours.

As a control method in this experiment, when the heater temperature reaches 140°C, the temperature sensor (3) senses it, the heating element (2) turns off, and the timer (4) operates for 6 hours.

When the timer (4) stops, the heating element (2) is energized again.

When this device was placed in an atmosphere of 30°C and 90% temperature and operated, 33g of water could be collected per day.

FIG. 3 is a diagram showing an operating situation when the indoor humidity is high, and the heating element (2) is energized for a long time.

FIG. 4 shows a case where the humidity is lower than that in FIG. 3.

〔effect〕

As described above, the present invention is characterized in that a heating element that does not hinder moisture release is attached to one side of a hygroscopic body in which a hygroscopic filler is internally retained in a porous body having continuous micro-voids, and a heating element that does not hinder moisture release is attached to the porous body. A temperature sensor is provided, and a timer is connected to the heating element, which stops energizing the heating element when the temperature sensor detects that a predetermined temperature has been reached, and causes the heating element to be energized again after a predetermined period of time has elapsed after the energization was stopped. Therefore, the temperature of the hygroscopic body is detected by a temperature sensor, and unlike conventional methods, it is not affected by ions caused by electrolysis of the hygroscopic filler, and has the advantage of less variation in detection. Since the device is a temperature sensor, it has the advantage of being simple and inexpensive, compact, and less likely to break down. Furthermore, no electricity is consumed while the timer is operating, and if the humidity in the room is relatively low, even if the heating element is turned on, it quickly reaches the specified temperature and turns off, so less electricity is required. There is also an advantage.

[Brief explanation of the drawing]

Fig. 1: A perspective view from the back of an embodiment of the present invention, Fig. 2: A control circuit diagram of an embodiment of the present invention, Fig. 3:
・Graph showing the operating state of the present invention under high humidity, Figure 4... Showing the operating state of the present invention under medium humidity=
11- Graph. (1)...Moisture absorber, (2)...Heating element, (
3)...Temperature sensor, (4)...Timer, (
5)...Case, (6)...Front opening,
(7)...The water receptacle is a plate, (8)...The space. Patent applicant: Daiken Kogyo Co., Ltd.

Claims (1)

[Claims] (1) A heating element that does not impede moisture release is attached to one side of a porous body with continuous micro-voids, in which a hygroscopic filler is internally retained in the voids, and a temperature sensor is attached to the porous body. A timer is connected to the heating element, which stops energizing the heating element when the temperature sensor detects that a predetermined temperature has been reached, and causes the heating element to be energized again after a predetermined time elapses after the energization is stopped. Dehumidification equipment.