JPH02242028A - Electronic dehumidifer device - Google Patents

Abstract

PURPOSE:To provide an electronic dehumidifier device capable of removing frosted condition of a surface of a cooling member and performing an efficient dehumidifying of low tempera ture humidified air by a method wherein when a set temperature of suction air is less than a predetermined value along with an automatic controlling operation under a set humidity, an electrical energization for a fan and a thermo-electric element and a termination of electri cal energization are repeatedly performed. CONSTITUTION:When a fan 10 and a thermo-electric element 2 are electrically energized by a power supply unit 18, a cooling unit 3 and cooled. When a surface temperature is lowered than a dew point, moisture content in air sucked from a suction port 8 in contact with a surface of a cooling member is condensed. The condensed water droplets drop by their own weight and are collected from an opening 7 into a water receiving unit 5. The air sucked from a suction port 8 through an aeration passage 6 and dehumidified and air directly sucked from below the suction port 8 are mixed to each other are guided to a radiator side, the remove heat generated at the thermo-electrical element 2 while being contacting with radiation fins 4a, the air is discharged from the discharging port 9 out of the casing 1 by a fan 10. Accordingly, the dehumidifying operation can be efficiently carried out without being hindered by a frosting phenomenon in a humidifying region ranging from a high temperature to a low temperature.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electronic dehumidification device that condenses moisture in the air by utilizing the heat absorption and heat generation effects that occur when a thermoelectric element is energized.

[Conventional technology]

In this type of electronic dehumidification device, when the thermoelectric element is energized, the temperature of the cooling body thermally fixed to the heat absorption surface of the thermoelectric element decreases, and when the dew point temperature is reached, moisture in the air condenses on the surface, causing water droplets. Water is collected in the lower water receiver by natural fall and discharged.

[Problem to be solved by the invention]

However, under conditions of low intake air temperature, the surface temperature of the cooling body eventually falls below the frost point, causing frost formation on the surface of the cooling body, and heat exchange between the air and the cooling body occurs through the frost on the surface of the cooling body. Therefore, the heat exchange efficiency decreases, and if the thermoelectric element continues to be energized, a layer of frost will accumulate and the heat exchange efficiency will further deteriorate.

The present invention has been developed in consideration of the above points, and in addition to automatic control operation based on the set humidity, when the set temperature of intake air is less than a predetermined value, the fan and thermoelectric element are repeatedly energized and stopped. An object of the present invention is to provide an electronic dehumidifying device that can effectively dehumidify low-temperature and humid air by removing frost on the surface of a cooling body.

[Means to solve the problem]

In order to solve the above problems, the present invention includes a temperature sensor that detects the intake air temperature of a dehumidifier and a relative humidity sensor that detects the relative humidity of the intake air, and also energizes the fan and thermoelectric element when the humidity exceeds the set humidity. , an automatic operation circuit that stops energizing when the humidity is below a set humidity, and when the intake air temperature is above a predetermined temperature (for example, 10°C) at a humidity above the set humidity, the energization is continuously performed, and when the humidity is above the set humidity, the intake air is turned off. When the temperature is lower than the predetermined temperature (for example, 10° C.), the automatic operation circuit is configured to perform a repetitive operation of energizing for a predetermined period of time and stopping the energization for a predetermined period of time.

[For production]

When the thermoelectric element is energized, the temperature of the cooling body thermally fixed to the heat absorption surface of the thermoelectric element decreases, and when the dew point temperature is reached, moisture in the air condenses on the surface of the cooling body. When the intake air temperature of the dehumidifier is low, the surface temperature of the cooling body also decreases.

FIG. 5 is a graph showing the relationship between intake air temperature and cooling body surface temperature, and the intake air temperature that reaches the frost point varies depending on the relative humidity of the intake air. For example, in a high humidity atmosphere such as 95% RH, the intake air temperature reaches the frost point around 11°C, but 60% RH
In a humid atmosphere of H, the frost point is reached when the intake air temperature is around 14°C. Since high humidity exceeding 95% RH in a residential environment is considered to be a special region, if the intake air temperature is 10° C., it can be determined that the surface temperature of the cooling body is sufficiently below the frost point. At this time, the conditions of the dehumidifying device include an input of 36 W to the thermoelectric element, a heat transfer surface area ratio of 6 between the radiator and the cooling body, and forced ventilation by a fan.

FIG. 6 shows the change in the surface temperature of the cooling body over time after stopping the power supply to the fan and thermoelectric element under the same dehumidifying device and conditions. According to this, for example, if the intake air temperature is 5°C,
When the relative humidity is 60% Rtl, the surface temperature of the cooling body reaches the frost point or higher 3 minutes after the electricity supply is stopped, indicating that the cooling body is out of the frosted area. This is because when the current supply is stopped, the high temperature on the heat generating side of the thermoelectric element moves to the cooling body side, causing the temperature of the cooling body to rise. It can be estimated that if the intake air temperature exceeds 5°C, the air will leave the frosted area in a shorter time, and if it is less than 5°C, it will take longer to leave the frosted area.

For these reasons, for example, the set humidity of the dehumidifier is 60%.
R) If the operation control of the dehumidifier is configured as shown in steps 1 to 6 of the flowchart in Fig. 7 when the dehumidifier is operated at a temperature of 1 or higher, even if the intake air temperature reaches 10°C, the cooling body surface Dehumidification can be performed while defrosting the frost formed on the air by transferring heat from the radiator side.

That is, as shown in the flowchart of FIG. 7, after starting in step 1, it is detected in step 2 whether or not the relative humidity of intake air is equal to or higher than a set humidity (for example, 60% RH). is turned off (operation stopped). On the other hand, if it is Innis, the intake air temperature will be 10℃ in step 4.
Detect whether or not the above is true, and if yes, step 5
The process proceeds to step 60, and continuous operation is performed, but if it is NO (that is, if the intake air temperature is less than 10°C), the process proceeds to step 60.
Repeated operation of on for 5 minutes and off for 5 minutes is performed.

〔Example〕

FIG. 1 is a front view of the implementation of the device to which the present invention is applied;
The figure shows a longitudinal section. The structure of the dehumidification device is that a thermoelectric element 2 is arranged in the middle of a casing l, a cooling body 3 having cooling fins 3a is fixed thermally on the heat absorption side of the thermoelectric element 2, and a radiation fin is installed on the opposite heat generation side. The heat dissipating body 4 provided with the heat dissipating fins 4a is fixed in a thermally conductive manner, and the side of the heat dissipating fins 4a opposite to the thermoelectric element is in close contact with the inner wall of the casing 1. A water receiver 5 is disposed below the casing 1, and a ventilation passage 6 is provided between the water receiver 5, the cooling body 3, and the lower end surfaces of the heat radiating body 4. The open lower is an inlet for water dripping into the water receiver 5.

An intake port 8 is provided on the wall of the casing 1 facing the cooling body 3, and an exhaust port 9 is provided for discharging the air taken in from the intake port 8.
is provided above the casing on the same surface as the intake port 8, and a fan 10 is provided for exhaust air. A partition wall 11 is provided at the upper end of the cooling body 3 so that the air taken in from the intake port 8 passes through the ventilation path 6 to the heat radiation side and reaches the exhaust port 9. The intake port 8 opens between the lower end of the partition wall 11 and the upper part of the water receiver 5. The partition wall 12 is provided so that the intake air comes into contact with the cooling fins 3a.

The drive device of the dehumidifier and the temperature/humidity detection device are arranged in the space of the casing 1 separated from the ventilation path to the cooling body 3 and heat radiating body 4 by the partition wall 13. An opening 15 is provided, and a temperature detection section 16 for detecting the intake air temperature and a humidity detection section 17 for detecting the relative humidity of the intake air are arranged at the ventilation opening 15. An AC/DC power supply unit and an operation control unit 18 are arranged in the same space, and a ventilation port 14 communicating with the exhaust port 9 is provided at the upper end of the partition wall 13.

The operation will be explained below. When the fan 10 and thermoelectric element 2 are energized by the power supply unit 18, the cooling body 3 is cooled, and when the surface temperature drops below the dew point, moisture in the air that is drawn in through the air intake port 8 and comes into contact with the surface of the cooling body condenses. . The condensed water drops due to its own weight and is collected in the water receiver 5 from the open lower part. In the ventilation passage 6, the air that is a mixture of dehumidified air taken in through the intake port 8 and air directly taken in from below the intake port 8 is introduced to the heat radiator side, and while in contact with the heat radiation fins 4a, it is heated by the thermoelectric element 2. Fan 10 removes the generated heat
is discharged to the outside of the casing 1 from the exhaust port 9.

At this time, if the relative humidity of the intake air is the set humidity, - for example, if the humidity is 60% RH or higher, it is electrically turned on and 60% RH is turned on.
A control circuit that turns off if the humidity is lower than H, and a control circuit that turns off if the humidity is
If the humidity is 60% RH or more and the intake air temperature is less than 10 degrees Celsius, it will run continuously for 60 minutes and stop for 5 minutes. Set a repetitive operation circuit using a timer. Therefore, it is possible to effectively dehumidify humid areas ranging from high temperatures to low temperatures without being bothered by frost formation. The above set humidity can be electrically changed arbitrarily depending on the purpose of dehumidification.

FIG. 3 shows another example of draining water from the water receiver 5. In the case shown in FIGS. 1 and 2 above, the water receiver 5 is taken out and drained. In the case shown in FIG. 1, by fixing the water receiver 5 and attaching the hose 21, it is also possible to discharge the water to the outside through the hose 21. Third
In the figure, 22 indicates a hose connector, and 23 indicates a hose band.

FIG. 4 shows an electric control circuit applied to the electronic dehumidification device according to the present invention, in which a 100V AC power supply is connected to a humidity and temperature controller unit 43 via an AC/DC converter 41 provided in a power supply controller unit 40. Power for the controller is supplied. The humidity/temperature controller unit 43 includes a unit that outputs an on signal when the set humidity is, for example, 60% RH or more and an off signal when the set humidity is less than 60% RH, and a continuous on signal when the intake air temperature is 10° C. or more.
When the intake air temperature is less than 10° C., a unit is provided that outputs a repetitive operation signal of turning on for 60 minutes and turning off for 5 minutes. Supplied. As a result, the contacts of the relay 42 are turned on or off, and the thermo device (thermoelectric element) 48 and the heat radiation fan 4 are turned on or off.
Controls the operation of 9.

In FIG. 4, 44 is a relative humidity sensor, 45 is a temperature sensor, 46 is a temperature Hines, 47 is a power switch, 50 is a stop lamp, 51 is a float switch, 52 is a power lamp, and 53 is a full water lamp.

〔Effect of the invention〕

According to the present invention, it is possible to effectively dehumidify not only when the indoor temperature is high, but also when it is low.
Also, by setting the humidity to an appropriate level in advance, a comfortable living space can be created. It can be built into a wall and installed as an optimal dehumidifier, especially when keeping the humidity low in a storage room or closet.

[Brief explanation of drawings]

FIG. 1 is a front view of an electronic dehumidifying device to which the present invention is applied, FIG. 2 is a longitudinal sectional view of the device shown in FIG. 1, and FIG. 3 is a water receiver portion shown in FIG. 2. 4 is a diagram illustrating an electric control circuit applied to the electronic dehumidification device of the present invention; FIG. 5 is a diagram illustrating the relationship between intake air temperature and cooling body surface temperature; FIG. 7 is a flowchart showing the operation control of the electronic dehumidifier according to the present invention. (Explanation of symbols) 1: Casing, 2: Thermoelectric element, 3: Cooling body,
4: Heat sink, 5: Water receiver, 8: Intake port, 9: Exhaust port, 42: Control relay 43: IL
Temperature control unit, 44: relative humidity sensor, 45: temperature sensor.

Claims (1)

[Claims] 1. A cooling body and a heat radiating body are closely fixed to both sides of the thermoelectric element disposed in the casing, and air flowing into the cooling body from the intake port provided in the casing wall is directed below the cooling body and heat radiating body. The air flows through the ventilation path in the space in the casing that communicates the cooling body side and the heat radiating body side, moves to the heat radiating body side, passes through the heat radiating body, and is discharged by a fan from an exhaust port provided in the casing wall. An electronic dehumidifier is equipped with a temperature detection section that detects the temperature of the intake air of the dehumidifier and a humidity detection section that detects the relative humidity of the intake air, and also energizes the fan and thermoelectric element when the humidity is above the set humidity, and turns it on when the humidity is below the set humidity. When the automatic operation circuit stops and the intake air temperature is above the predetermined temperature when the humidity is above the set humidity, the above-mentioned energization is performed continuously, and when the intake air temperature is below the predetermined temperature when the humidity is above the set humidity, the energization is performed for a predetermined period of time and the predetermined time is applied. An electronic dehumidifier equipped with an automatic operation circuit that repeatedly operates with electricity turned off for a certain period of time.