JP2668809B2 - Automatic control method for embedded electronic dehumidifier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an embedded electronic dehumidifier, and more particularly to a method for automatically controlling an electronic dehumidifier that is used by being embedded in a wall surface such as a push-in case.

[0002]

2. Description of the Related Art A thermoelectric module in which thermoelectric elements are assembled, cooling fins and heat radiation fins provided on the heat absorption side and heat generation side, and a fan for producing an airflow from outside the dehumidifier to the outside through the cooling fin and the heat radiation fin. An electronic dehumidifier provided with the above is known, and is used, for example, for dehumidifying an enclosed space such as a control panel. It has been proposed to control the operation of the dehumidifier by a defrost signal or a signal from a humidity sensor, or to stop the dehumidifier by a full alarm signal from a storage tank of dehumidified water (for example, Japanese Patent Application Laid-Open No. SHO 54-54). -113
951). Further, regarding the arrangement of the sensors, there is a proposal that the sensors are insulated outside the dehumidifier (see Japanese Utility Model Application Laid-Open No.
-136233).

[0003]

However, since the power supply of the electronic dehumidifier generates several watts of heat even when the power is not supplied to the thermoelectric module, the temperature inside the dehumidifier is higher than the temperature of the external air. The humidity of the air inside the vessel is lower than the humidity of the outside air. This tendency is remarkable in the case of the embedded type electronic dehumidifier because it is difficult to dissipate the heat, and the following inconvenience has occurred.

That is, the electronic dehumidifier is automatically turned on at 55% (the thermoelectric module and the fan are turned on), and automatically turned off at 45%.
Assuming that the thermoelectric module and the fan are adjusted to OFF, as a result of the operation of the dehumidifier, the humidity of the space to be dehumidified, for example, the air in the closet decreases, and the dehumidifier automatically stops operating at 45%. Then, the humidity in the closet gradually increases.

However, due to the heat generated by the power supply of the dehumidifier, the operation of the dehumidifier does not resume unless the humidity in the closet reaches about 65% for the above-mentioned reason. In this case, dew condensation may occur partially in the closet, which is not appropriate as a method for controlling the dehumidifier.

On the other hand, the electronic dehumidifier is automatically turned on at 45%,
If the automatic dehumidifier is adjusted at 5%, the humidity in the closet and the dehumidifier will be almost the same because the fan of the operating dehumidifier is rotating, and the humidity in the closet must be 35% or less. You will not stop driving. It is not easy to keep the humidity in the closet below 35%, so the dehumidifier runs for a long time and the fan runs for a long time.

The above problem caused by the difference in humidity between the dehumidified space and the dehumidifier can be solved by operating the fan independently of the external humidity. This method impairs the durability of the dehumidifier, since the fan with the shortest life is the fan.

[0008] Further, it is possible to solve the problem by exposing the humidity sensor to the outside of the dehumidifier and directly detecting the humidity of the space to be dehumidified. However, in the case of the embedded type dehumidifier, the sensor may be damaged. This method is also not suitable.

The present invention has been made in view of the above circumstances, and provides an automatic control method of an embedded electronic dehumidifier which can reduce apparent hysteresis without sacrificing the durability of the dehumidifier. The purpose is to do.

[0010]

SUMMARY OF THE INVENTION The present invention comprises a thermoelectric module in which thermoelectric elements are assembled, cooling fins and heat radiating fins provided on the heat absorbing side and heat generating side, and cooling fins and heat radiating fins from outside the dehumidifier. In a method for automatically controlling the operation of an electronic dehumidifier provided with a fan that creates an airflow to the outside of the dehumidifier, the intermittent operation of the fan is performed when the detected humidity of a humidity sensor in the dehumidifier is lower than a set humidity. External air is taken into the dehumidifier and supplied to the humidity sensor.

[0011]

According to the dehumidifier of the present invention, even when the dehumidifier is stopped, if the detected humidity is lower than the set humidity, the fan is operated intermittently to supply the external air to the humidity sensor. Therefore, the humidity inside the dehumidifier approaches the external humidity, thereby enabling more normal operation.

[0012]

An embodiment of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show an embedded type electronic dehumidifier of the present invention. An exhaust port 2 is opened at an upper portion of a front surface of a casing 1 of the electronic dehumidifier, and an intake port 3 is opened at a middle portion on the right side. And cooling fins 4 are arranged behind the intake port 3,
A radiating fin 5 is disposed behind it, and a thermoelectric module 6 having thermoelectric elements assembled between the two fins 4 and 5 is fixed so as to be able to conduct heat. The radiating fin 5 extends above the cooling fin 4, and another radiating fin 7 is fixed to a front surface of an upper portion of the radiating fin 5. There is. A fan 9 is attached behind the right side portion of the exhaust port 2, and a control circuit section and a power source section 10 are arranged behind the left side portion.
The humidity sensor 11 connected to the control circuit is disposed behind the air inlet 3. A storage tank 12 is placed below the cooling fins 4 and can be taken in and out through an opening on the front surface of the lower portion of the casing 1.

Hereinafter, the humidity at which the electronic dehumidifier is automatically turned on (the thermoelectric module 6 and the fan 9 are turned on) is 60%,
The operation when the humidity at which F (the thermoelectric module 6 and the fan 9 are turned off) is 50% and the set humidity which is a reference for intermittently operating the fan 9 is set to 60% will be described.

When the humidity detected by the humidity sensor 11 is 60% or more, the electronic dehumidifier is automatically turned on by the control circuit unit, and the thermoelectric module 6 and the fan 9 are turned on. That is, power is supplied from the power supply unit 10 to the thermoelectric module 6 and the fan 9,
External air is introduced into the casing 1 from the intake port 3 by the fan 9 and cooled by the cooling fins 4, so that moisture in the air is condensed on the surface thereof. The dehumidified air passes through the radiating fins 5 to cool the radiating fins 5 and 7, and then is discharged from the exhaust port 2. In this way, the external air is gradually dehumidified and the humidity is reduced. When the humidity detected by the humidity sensor 11 reaches 50%, the electronic dehumidifier is automatically turned off, the thermoelectric module 6 and the fan 9 are turned off, and the power supply to them is stopped.

In this automatic OFF state, the humidity gradually rises gradually, but when the humidity detected by the humidity sensor 11 is lower than the set humidity of 60%, the fan is turned on by the control circuit for 5 minutes every 60 minutes. The fan 9 is operated intermittently until the detected humidity reaches 60%. In this way, since the external air is intermittently taken into the electronic dehumidifier by the fan 9, it is possible to prevent the difference between the humidity of the external air and the humidity detected by the humidity sensor 11 from occurring. Therefore, when the humidity of the external air rises and reaches 60% again, the humidity sensor 11 detects it and the electronic dehumidifier is automatically turned on as described above to lower the humidity of the external air.

As described above, when the electronic dehumidifier for house closet was automatically controlled, the following results were obtained. Indentation humidity 60 ± 5% (measured average value) Fan operation rate 70% (compared to conventional control method)

The condition of the intermittent operation of the fan 9, that is, the set humidity, the operation time, the operation interval, and the like are appropriately determined in consideration of the volume of the space to be dehumidified, the amount of dehumidification, the capacity of the dehumidifier, and the like. Can be obtained.

[0019]

As described above, according to the present invention, when the operation of the dehumidifier is stopped, if the detected humidity is lower than the set humidity, the fan is operated intermittently to supply the external air to the humidity sensor. Therefore, the humidity inside the dehumidifier approaches the external humidity, and appropriate automatic operation according to the humidity of the external air can be performed.

When the operation of the dehumidifier is stopped, the fan is rotated intermittently and not continuously, so that the life of the fan is long and the durability of the dehumidifier is not impaired. Furthermore,
Since there is no need to expose the humidity sensor to the outside of the dehumidifier,
There is little risk of sensor failure.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an electronic dehumidifier of the present invention.

FIG. 2 is a perspective view of the electronic dehumidifier of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Casing 2 Exhaust port 3 Inlet port 4 Cooling fin 5 Radiation fin 6 Thermoelectric module 7 Radiation fin 8 Partition wall 9 Fan 10 Power supply unit 11 Humidity sensor 12 Storage tank

Claims (1)

(57) [Claims] 1. A thermoelectric module in which thermoelectric elements are assembled, a cooling fin and a heat radiating fin provided on a heat absorbing side and a heat generating side thereof, and a fan for generating an air flow from outside the dehumidifier to the outside through the cooling fin and the heat radiating fin. In the method of automatically controlling the operation of the electronic dehumidifier provided with, when the detected humidity of the humidity sensor in the dehumidifier is lower than the set humidity, the external air is taken into the dehumidifier by operating the fan intermittently,
An automatic control method for an embedded electronic dehumidifier, wherein the method is supplied to a humidity sensor.