JPH0749880B2 - Dehumidifier control device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a dehumidifier control device that adjusts the dehumidifying ability of a dehumidifier using an electronic cooling element.

[Prior Art] FIGS. 3 and 4 show conventional examples. FIG. 3 is a vertical sectional view of the dehumidifying device.

In FIG. 3, a casing 1 is of a vertically long type in which a ventilation passage 4 that connects an intake port 2 in the lower part and an exhaust port 3 in the upper part is formed, and this casing 1 is a metal casing in the upper part.
It is composed of 1a and a lower resin casing 1b.

The blower 5 is a fan mounted in the casing 1 near the exhaust port 3, and the electronic cooling element 6 is disposed in the ventilation passage 4 near the intake port 2 with a cooling fin.
It is a Peltier element in which the cooling unit 6a is joined to The heat radiator 7 is arranged in the ventilation passage 4 on the exhaust port 3 side of the electronic cooling element 6, and the heat conductor 8 is the heat radiator 7 and the heat generating portion of the electronic cooling element 6.
Connected with 6b.

The blower amount control device 9 controls the increase / decrease of the blower amount of the blower 5, that is, the operation of the blower 5 and the stop thereof.
Resin casing that includes the circuit provided above
It is installed in a storage space 21 formed at the bottom of 1b. In this storage space 21, the printed circuit board 15 and the resin casing
A heat insulating space 23 is formed between the bottom plate 16 of 1b.

The humidity sensor 10 is connected to the printed circuit board 15 and is attached to the bottom plate 16 so as to be exposed to the outside of the casing 1. Since the humidity sensor 10 is attached to the casing 1 with the heat insulating space 23 separated, the influence of the conductive heat from the casing 1 is small and the accuracy is high.

The power transformer 11 is attached to the ear 8 a at the upper end of the heat conductor 8 and is located above the radiator 7 in the casing 1.
The power transformer 11 includes a blower 5 and an electronic cooling element 6.
Is for driving. Further, the air flow rate control device 9
Power is also supplied to the humidity sensor 10. The blower 5 is arranged above the power transformer 11.

The rectifying device 17 is installed inside a storage space 22 formed in the upper part of the resin casing 1b together with a printed circuit board 24 on which a capacitor 28 (FIG. 4) and the like are mounted.

The power supply fuse 18 is mounted on the printed board 15 and is housed in the storage space 21. 19 is a spacer. 25 is a power lamp.

FIG. 4 is a control circuit diagram of the conventional dehumidifier of FIG.

Power is supplied from the secondary side terminal of the power transformer 11 to the humidity sensor 10 and the DC power supply device 27.

The humidity sensor 10 is connected to the air flow rate control device 9,
The humidity outside the casing 1, that is, in the space to be dehumidified is detected, and the detection signal is transmitted to the air flow rate control device 9. The air flow rate control device 9 takes power from the secondary side terminal of the power transformer 11 and is connected to the humidity sensor 10 in the determination circuit 24,
It is composed of an output circuit 25 and an output contact 26. The series circuit of the output contact 26 and the blower 5 is the power transformer 11 1
Connected to the next terminal. The judgment circuit 24 is a humidity sensor.
The detection signal of 10 is input, the level of humidity is determined, and a signal for turning on and off the output contact 26 is sent to the output circuit 25.

The DC power supply device 27 is composed of a bridge-type output rectifier device 17 for full-wave rectification and a capacitor 28 for smoothing,
It is for supplying a constant DC voltage to the electronic cooling element 6.

With such a configuration, the humid air sucked through the intake port 2 becomes a dew point when passing through the cooling body 20 joined to the electronic cooling element 6, and moisture in the air is removed. The dehumidified air cools the radiator 7, becomes dry air, and is discharged from the exhaust port 3.

Normally, the air passing through the cooling body 20 is naturally convected by utilizing the heat generated by the radiator 7 and the power transformer 11 provided above the electronic cooling element 6.

And when the humidity is high (70-85% relative humidity), the humidity sensor
The air flow rate control device 9 operates based on the detection signal of 10, and the blower 5 is operated to generate forced convection. When forced convection occurs, the amount of air passing through the cooling body 20 increases, so that the amount of dew condensation on the cooling body 20 increases and the dehumidifying ability improves. Further, the heat dissipation effect of the radiator 7 is also enhanced.

[Problems to be solved by the invention]

 The conventional example has the following problems.

When the amount of air blown by the blower 5 is increased (including switching from natural convection to forced convection), the amount of air passing through the cooling body 20 is increased, so that the amount of dew condensation on the cooling body 20 is increased and the dehumidifying ability is improved. On the other hand, the side effect that the amount of heat taken away from the air by the cooling body 20 increases and the temperature of the cooling body 20 rises (Fig. 5), the amount of dew condensation on the cooling body 20 decreases, and the dehumidifying ability decreases. was there. Therefore, even if the amount of air blown by the blower 5 is increased during forced convection, only the dehumidifying ability that is the difference between these effects and side effects can be improved, and the dehumidifying ability was improved only about twice as much as during natural convection.

In addition, the temperature of the radiator 7 was also lowered (Fig. 6) and the heat radiation effect was lowered.

An object of the present invention is to provide a dehumidifier control device that cancels the above-mentioned side effects and further improves the dehumidification capacity during forced convection.

[Means for solving problems]

The controller of the dehumidifier of the present invention is a casing forming an air passage having an exhaust port and an air inlet, a cooling body arranged in the air passage, and an electronic cooling element in which a cooling unit is joined to the cooling body, A blower that circulates air in the dehumidification target space in the ventilation path, a humidity sensor that detects the humidity of the dehumidification target space, and an air flow rate that increases or decreases the air flow rate of the blower according to the humidity level detected by the humidity sensor. A control device and a voltage control device for increasing / decreasing the voltage applied to the electronic cooling element according to an increase / decrease in the amount of air blown by the blower are provided.

[Action]

According to the configuration of the present invention, since the voltage control device that increases or decreases the applied voltage to the electronic cooling element according to the increase or decrease in the air flow rate of the blower is provided, the voltage applied to the electronic cooling element is increased when the air flow rate of the blower increases. By increasing the temperature, the temperature of the cooling body is lowered, the amount of dew condensation on the cooling body is increased, the side effect that the conventional dehumidifier has at the time of forced convection is canceled, and the dehumidifying ability can be improved.

That is, in the conventional dehumidifier, when the amount of air blown by the blower is increased, the amount of air passing through the cooling body is increased, so that the amount of dew condensation on the cooling body is increased and the dehumidifying ability is improved, while the cooling body is There is a side effect that the amount of heat taken from the air increases and the temperature of the cooling body rises, so that the amount of dew condensation on the cooling body decreases and the dehumidifying ability decreases, but the side effect can be canceled. Therefore, the dehumidifying ability during forced convection can be further improved.

Further, since the temperature of the heat radiator rises and the heat radiation effect is enhanced, the temperature of the cooling body is further lowered, and the dehumidifying ability at the time of forced convection can be improved.

〔Example〕

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

FIG. 1 is a vertical sectional view of the dehumidifier, and FIG. 2 is a control circuit diagram thereof.

The control device of this dehumidifier has the following configuration.

The casing 1 forms an air passage 4 having an exhaust port 3 and an intake port 2 at the top and bottom, and a radiator 7 and a cooling body 20 are arranged above and below each other in the air passage 4. In the electronic cooling element 6, the heat generating portion 6b and the cooling portion 6a are joined to the heat radiating body 7 and the cooling body 20 via the heat conducting body 8. The blower 5 circulates the air in the dehumidification target space of the ventilation passage 4 and the humidity sensor 10
The air flow rate control device 9 increases or decreases the air flow rate according to the level of humidity in the dehumidification target space detected by. Voltage controller 29
Increases or decreases the voltage applied to the electronic cooling element 6 according to the increase or decrease in the amount of air blown by the blower 5.

The configuration of the dehumidifier control device of this embodiment is different from that of the conventional example, that is, a voltage control device 29 that increases / decreases the applied voltage of the electronic cooling element 6 according to the increase / decrease of the air flow, that is, the operation or stop of the air blower 5.
That is the point.

As shown in FIG. 1, the voltage control device 29 is installed inside the storage space 21 together with the air flow rate control device 9.

As shown in FIG. 2, this voltage control device 29 includes a high voltage side terminal 11a and a low voltage side terminal 11b provided on the secondary side of the power transformer 11.
One of the switching contacts 29a, 29b is connected to the input end of the DC power supply device 27. These switching contacts 29a, 29b
Interlocks with the output contact 26 of the air flow control device 9
Corresponding to ON / OFF of 26, high voltage side terminal 11a, low voltage side terminal 11
The voltage applied to the electronic cooling element 6 is switched between high and low by switching the connection to b.

Others are the same as in the conventional example, and therefore, the same parts are denoted by the same reference numerals and the description thereof is omitted.

With such a configuration, when the space to be dehumidified has a high humidity and the operation of the blower 5 is started and forced convection occurs, the voltage applied to the electronic cooling element 6 is increased at the same time, so the strength operation of the dehumidifier of the conventional example is performed. Compared with the time, the temperature of the cooling body 20 drops,
The side effect of the conventional dehumidifier described above is canceled and the dehumidifying ability is improved.

Further, since the temperature of the radiator 7 rises, the heat radiation effect is enhanced as compared with the forced operation of the conventional dehumidifier, the temperature of the cooling body is lowered, and the dehumidifying ability is improved.

In the above embodiment, the air flow rate control device 9 is a humidity sensor.
Although the operation and stop of the blower 5 are switched according to the level of humidity detected by 10, the number of revolutions of the fan of the blower 5 may be controlled to be high or low according to the level of humidity. In that case, the voltage controller 29 increases or decreases the voltage applied to the electronic cooling element 6 in accordance with the level of the rotation speed of the fan of the blower 5, that is, the increase or decrease in the amount of air blown by the blower 5. The increase or decrease of the applied voltage may be adjusted stepwise or continuously.

In the above-mentioned embodiment, the switching type between natural convection and forced convection is used, but only forced convection may be used. In that case, the exhaust port 3 and the intake port 2 do not have to be provided above and below. The same applies to the radiator 7 and the cooling body 20.

In the above embodiment, the radiator 7 may not be arranged inside the casing 1.

〔The invention's effect〕

According to the dehumidifier control device of the present invention, the voltage control device that increases / decreases the voltage applied to the electronic cooling element according to the increase / decrease in the air blowing amount of the blower is provided, so the electronic cooling element is increased when the air blowing amount of the fan is increased. By increasing the voltage applied to the cooling body, the temperature of the cooling body is lowered, the amount of condensation on the cooling body is increased, and the side effect that the conventional dehumidifier has at the time of forced convection is canceled and the dehumidification capacity is improved. Can be achieved.

That is, in the conventional dehumidifier, when the amount of air blown by the blower is increased, the amount of air passing through the cooling body is increased, so that the amount of dew condensation on the cooling body is increased and the dehumidifying ability is improved, while the cooling body is cooled. There is a side effect that the amount of heat taken away from the air increases and the temperature of the cooling body rises, so that the amount of dew condensation on the cooling body decreases and the dehumidifying ability decreases, but the side effect can be canceled. Therefore, the dehumidifying ability during forced convection can be further improved.

Further, since the temperature of the heat radiator rises and the heat radiation effect is enhanced, the temperature of the cooling body is further lowered, and the dehumidifying ability at the time of forced convection can be improved.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an embodiment of the present invention, FIG. 2 is a control circuit diagram thereof, and FIG. 3 is a vertical sectional view of a conventional dehumidifier.
FIG. 5 is a control circuit diagram thereof, FIG. 5 is a temperature change diagram of the cooling body, and FIG. 6 is a temperature change diagram of the radiator. 1 ... Casing, 2 ... Intake port, 3 ... Exhaust port, 4 ... Ventilation path, 5 ... Blower, 6 ... Electronic cooling element, 6a ... Cooling part, 6b ...
Heat generating part, 7 ... Radiator, 8 ... Heat conductor, 9 ... Air flow rate control device, 10 ... Humidity sensor, 11 ... Power transformer, 20 ... Cooler,
29 ... Voltage control device

Claims (1)

[Claims] 1. A casing in which a ventilation passage having an exhaust port and an intake port is formed, a cooling body arranged in the ventilation passage, an electronic cooling element in which a cooling unit is joined to the cooling body, and dehumidification in the ventilation passage. A blower that circulates air in the target space, a humidity sensor that detects the humidity of the dehumidification target space, and an air flow rate control device that increases or decreases the air flow rate of the blower according to the level of humidity detected by this humidity sensor, A dehumidifier control device, comprising: a voltage control device that increases / decreases an applied voltage to the electronic cooling element according to an increase / decrease in the amount of air blown by a blower.