JPH0765763B2 - Electronic dehumidifier - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an electronic dehumidifier that uses moisture absorption and heat generation that occur when a thermoelectric element is energized to condense moisture in the air.

[Conventional technology]

This type of electronic dehumidification device, when the thermoelectric element is energized, the temperature of the cooling body that is thermally conductively fixed to the heat absorbing surface of the thermoelectric element falls, and when the dew point temperature is reached, the moisture in the air is condensed on the surface,
The water droplets are naturally dropped and collected in the water receiver below and discharged.

[Problems to be Solved by the Invention]

However, when the intake air temperature is low, the surface temperature of the cooling body becomes below the frost point before the frosting phenomenon occurs on the cooling body surface, and the heat exchange between the air and the cooling body is performed through the frost on the cooling body surface. Therefore, the heat exchange efficiency decreases, and if the thermoelectric element is continuously energized as it is, the frost layer is accumulated and the heat exchange efficiency further deteriorates.

The present invention has been made in view of the above points, and when the set temperature of the intake air is lower than a predetermined value in combination with the automatic control operation based on the set humidity, the repetitive operation of energizing the fan and the thermoelectric element and stopping the energization is performed. In addition, it is an object of the present invention to provide an electronic dehumidifying device capable of effectively dehumidifying low temperature and high humidity air by removing frost on the surface of a cooling body.

[Means for Solving the Problems]

In order to solve the above problems, in the present invention, a temperature sensor for detecting the intake air temperature of the dehumidifier and a relative humidity sensor for detecting the relative humidity of the intake air are provided, and the fan and the thermoelectric element are energized at a set humidity or higher. , An automatic operation circuit that stops energization above a set humidity, and when the intake air temperature is above a predetermined temperature (for example, 10 ° C) above the set humidity, the energization is continuously performed and the intake air above the set humidity is reached. When the temperature is lower than the predetermined temperature (for example, 10 ° C.), the automatic operation circuit is configured to perform repetitive operation of energization for a predetermined time and stop energization for a predetermined time.

[Work]

When the thermoelectric element is energized, the temperature of the cooling body that is heat transfer fixed to the heat absorbing surface of the thermoelectric element decreases, and when the dew point temperature is reached, moisture in the air is condensed 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 drops.

FIG. 5 is a graph showing the relationship between the intake air temperature and the surface temperature of the cooling body. The intake air temperature reaching the frost point also varies depending on the relative humidity of the intake air. For example, in a high humidity atmosphere such as 95% RH, the frost point reaches around 11 ° C in intake temperature, but in a humidity atmosphere of 60% RH, the frost point reaches around 14 ° C in intake temperature. In a residential environment, high humidity exceeding 95% RH is considered to be a special area, so if the intake air temperature is 10 ° C, it can be judged that the surface temperature of the cooling body is well below the frost point. At this time, the conditions of the dehumidifier are 36 W of input 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 changes in the surface temperature of the cooling body with the lapse of time after the energization of the fan and the thermoelectric element was stopped under the same dehumidifying device and conditions. According to this, for example, the intake air temperature is 5 ° C,
When the relative humidity is 60% RH, the cooling body surface temperature becomes higher than or equal to the frost point 3 minutes after stopping the energization, indicating that the cooling body is out of the frosting region. This is because when power supply is stopped, the high temperature on the heat generating side of the thermoelectric element moves to the cooling body side and the temperature of the cooled cooling body rises. It can be presumed that if the intake air temperature exceeds 5 ° C, the air temperature departs from the frost formation region in a shorter time, and if it is less than 5 ° C, the time out of the frost formation region extends.

From these, for example, the set humidity of the dehumidifier is 60% RH.
If the operation control of the dehumidifier is configured as shown in step 1 to step 6 of the flowchart of FIG. 7 when it is operated as described above, it occurs on the surface of the cooling body even if the intake air temperature reaches 10 ° C. Defrosting can be performed while defrosting by frost formation by heat transfer 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),
If it is "NO", it is turned off (stopped) in step 3.
On the other hand, if yes, in step 4, it is detected whether the intake air temperature is 10 ° C or higher. If yes, the operation proceeds to step 5, but continuous operation is performed, but if it is no (that is, the intake air temperature is less than 10 ° C). If so) go to step 6 and turn on for 60 minutes,
Repeated operation of off for 5 minutes is performed.

〔Example〕

FIG. 1 is a front view of an embodiment of an apparatus to which the present invention is applied, and FIG.
The figure shows a longitudinal section. In the structure of the dehumidifier, a thermoelectric element 2 is arranged almost in the middle of the casing 1, a cooling body 3 having a cooling fin 3a is thermally fixed to the heat absorbing side of the thermoelectric element 2, and a heat radiating fin is provided on the opposite side to the heat generating side. The radiator 4 provided with 4a is heat-transfer-fixed, and the anti-thermoelectric element side of the radiation fin 4a is in close contact with the inner wall of the casing 1. A water receiver 5 is arranged below the casing 1, and an air passage 6 is provided between the water receiver 5 and the lower end surfaces of the cooling body 3 and the radiator 4. The opening 7 is an inlet for water that drops into the water receiver 5.

An intake port 8 is provided in the wall of the casing 1 facing the cooling body 3, and an exhaust port 8 for exhausting air taken in from the intake port 8 is provided.
A fan 10 is provided for exhausting air, which is provided above the casing on the same plane as the intake port 8. 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 passage 6 to the heat radiation side and reaches the exhaust port 9. 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 contacts the cooling fins 3a.

The partition wall 13 has a dehumidifier drive device and a temperature / humidity detection device in the space of the casing 1 which is isolated from the ventilation paths to the cooling body 3 and the heat radiating body 4. A temperature detector 16 that has a port 15 and detects the intake air temperature
A humidity detecting unit 17 for detecting the relative humidity of the intake air is arranged at the ventilation port 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 described below. Fan 1 by power supply unit 18
When the thermoelectric element 2 is energized, when the cooling body 3 is cooled and the surface temperature drops below the dew point, the moisture in the air sucked from the intake port 8 and in contact with the surface of the cooling body is condensed. The condensed water drop is dropped by its own weight and is collected in the water receiver 5 through the opening 7. In the ventilation path 6, the air mixed with the air sucked from the intake port 8 and dehumidified and the air directly sucked from the lower part of the intake port 8 is introduced to the radiator side, and the thermoelectric element 2 contacts the radiator fin 4a. The generated heat is taken away and discharged from the exhaust port 9 to the outside of the casing 1 by the fan 10.

At this time, the relative humidity of the intake air is set humidity, for example, if the humidity is 60% RH or more, it is turned on electrically, and if it is less than 60% RH, it is turned off. , Continuous operation if the intake air temperature is 10 ℃ or higher, 60 minutes operation if the humidity is 60% RH or higher and the intake air temperature is lower than 10 ℃,
Since the repeated operation circuit is set by the timer for stopping for 5 minutes, dehumidification can be effectively performed in the high humidity region from high temperature to low temperature without being bothered by the frosting phenomenon. The set humidity can be arbitrarily changed electrically according to the purpose of dehumidification.

FIG. 3 shows another example of draining the water receiver 5, and in the one shown in FIGS. 1 and 2 above, the water receiver 5 is taken out and drained. In the case shown in, the hose 21 can be attached by fixing the receiver 5
It is also possible to discharge it through 21. In FIG. 3, 22 is a hose connector, and 23 is a hose band.

FIG. 4 is an electric control circuit applied to the electronic dehumidifier according to the present invention, in which humidity is supplied from an AC 100V power source through an AC / DC converter 41 provided in the power source controller unit 40.
Controller power is supplied to the temperature controller unit 43. The humidity and temperature controller unit 43 includes
On-signal at a set humidity of 60% RH or more, 60% of the set humidity
The unit that outputs an off signal below RH and the intake air temperature is 10
Continuous ON signal above ℃, when intake temperature is below 10 ℃
A unit that outputs a repetitive operation signal that is on for 60 minutes and off for 5 minutes is provided, and the output of both these units is AND gated.
A predetermined signal is supplied to relay 42 via 431 and transistor 432. As a result, the contact of the relay 42 is turned on or off to control the operation of the thermo device (thermoelectric element) 48 and the heat radiation fan 49.

In FIG. 4, 44 is a relative humidity sensor, 45 is a temperature sensor,
46 is a thermal fuse, 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 lamp.

〔The invention's effect〕

According to the present invention, it is possible to effectively dehumidify not only when the room temperature is high, but also when the room temperature is low,
In addition, a comfortable living space can be created by setting the proper humidity in advance. In particular, it can be built in and installed on the wall as an optimum dehumidifier when keeping the humidity of the storage or closet low.

[Brief description of drawings]

FIG. 1 is a front view of an electronic dehumidifier 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. FIG. 4 is a diagram showing a modified example of FIG. 4, FIG. 4 is a diagram illustrating an electric control circuit applied to the electronic dehumidifier of the present invention, FIG. 5 is a diagram showing a relationship between intake air temperature and a cooling body surface temperature, and FIG. FIG. 7 is a diagram showing the transition of the cooling body surface temperature with the lapse of time after stopping the energization of the fan and the thermoelectric element, and 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 radiator, 5: Water receiver, 8: Intake port, 9: Exhaust port, 42: Control relay, 43: Humidity, temperature Control unit, 44: Relative humidity sensor, 45: Temperature sensor.

Front Page Continuation (72) Inventor Takeyuki Tezuka 1-9-9 Yaesu, Chuo-ku, Tokyo Within Imperial Piston Ring Co., Ltd. (72) Inventor Shiro Nishimoto 1-9-9 Yaesu, Chuo-ku, Tokyo Imperial Piston Ring Stock In-house (72) Inventor Toshiho Fukuda 1-9-9 Yaesu, Chuo-ku, Tokyo Within Imperial Piston Ring Co., Ltd.

Claims (1)

[Claims] 1. A cooling body and a radiator are closely fixed to both surfaces of a thermoelectric element arranged in a casing, and the air flowing into the cooling body side from an intake port provided in a casing wall radiates the heat to the cooling body. It is provided below the body and moves to the radiator side through the ventilation passage of the space in the casing that connects the cooling body side and the radiator side, and moves to the radiator side through the radiator and the fan from the exhaust port provided in the casing wall. The discharged electronic dehumidifier has a temperature detector that detects the intake air temperature of the dehumidifier and a humidity detector that detects the relative humidity of the intake air, and energizes the fan and thermoelectric elements above the set humidity and below the set humidity. When the intake air temperature is above the set humidity, the energization is continuously performed when the intake air temperature is above the set humidity. Electronic dehumidifier and an automatic operation circuit for repeating operation of the predetermined time energization and a predetermined time deenergized when less than degrees.