JPS63113240A - Dehumidifier control device - Google Patents

Abstract

PURPOSE:To attempt to improve the dehumidifying capability during forced convection by increasing or decreasing the amount of air according to the detected humidity by a humidity sensor for a space which is the object of dehumidification and increasing or decreasing the voltage applied to an electronic cooling element according to the increase or decrease of the amount of wind. CONSTITUTION:A blower 5 circulates the air in a space which is the object of dehumidification to an air passage 4 and according to the humidity detected by a humidity sensor 10 of the space which is the object of dehumidification the amount of air is increased or decreased by an air amount control device 9. A voltage control device 29 increases or decreases the voltage applied to an electronic cooling element 6 according to the increase or decrease of the air amount from the blower 5. Accordingly when high humidity is given and forced convection is made by starting the operation of the blower 5, the voltage applied to the electronic cooling element 6 at the same time is increased, decreasing the temperature of a cooling body 20 in comparison with the forced operation of conventional dehumidifiers and increasing the dehumidifying capability. Further, because the temperature of a heat radiation body 7 is raised, it is possible to raise heat radiation effect in comparison with the forced operation of conventional dehumidifiers and lower the temperature of the cooling body 20 and increase the dehumidifying capability.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a control device for a dehumidifier that adjusts the dehumidification capacity for dehumidification using an electronic cooling element.

[Conventional technology]

A conventional example is shown in FIGS. 3 and 4, and FIG. 3 is a longitudinal sectional view of a dehumidifying device.

In FIG. 3, the casing 1 has a vertically elongated shape with a ventilation passage 4 connecting the lower intake port 2 and the upper exhaust port 3, and the casing 1 has an upper metal casing 1a and a lower metal casing 1a. It is composed of a resin casing Ib.

The blower 5 is a fan installed near the exhaust port 3 within the casing 1, and the electronic cooling element G is connected to the i11&1 path 4.
This is a Peltier element in which the cooling portion 6a is joined to a cooling body 20 with cooling fins disposed near the intake port 2. The heat radiator 7 is arranged in the ventilation passage 4 on the side closer to the exhaust port 3 than the electronic cooling element 6, and the heat conductor 8 connects the heat radiator 7 and the heat generating part 6b of the electronic cooling element 6.

Air flow control s! The M position 9 includes a circuit provided on the printed circuit board 15 to control the increase/decrease of the air flow rate of the blower 5, that is, the operation and stop of the blower I@fi5, and is a storage space formed at the bottom of the resin casing lb. It is installed in space 21. In this storage space 21, the printed circuit board 1
A heat insulating space 23 is formed between the resin casing 5 and the bottom plate 16 of the resin casing 1b.

The humidity sensor 10 is connected to a printed circuit board 15,
It is attached to the bottom plate 16 so as to be exposed outside the casing 1. Since the humidity sensor 10 is attached to the casing 1 with the heat insulating space 23 in between, the humidity sensor 10 is less affected by heat transfer from the casing 1 and has high accuracy.

The power transformer 11 is attached to the ear portion 8a at the upper end of the heat conductor 8, and is located above the heat radiator 7 within the casing l. This power transformer 11 is for driving the blower 5 and the electronic cooling element 6. Also, the air flow rate control device 9 and the humidity sensor 10? ! ! supplying the source. The blower 5 is arranged above the m-source transformer 11.

The rectifier 17 is housed in 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 source 18 is mounted on the printed circuit board 15 and 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. 3.

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

The humidity sensor IO is connected to the airflow rate control device 9, detects the humidity outside the casing 1, that is, the space to be dehumidified, and transmits the detection signal to the airflow rate control device 9. This air flow rate control device 9 receives power from the secondary side terminal of a power transformer 11, and has a determination circuit 24 connected to a humidity sensor 10. 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 connected to the primary side terminal of the power transformer 11.The 0 judgment circuit 24 receives the detection signal of the humidity sensor 10 and judges the level of humidity. Input.

A signal for shutting off is sent to the output circuit 25.

The DC power supply device 27 is a bridge-type rectifier i! that performs full-wave rectification. 17 and a capacitor 28 for smoothing, and supplies a constant DC voltage to the electronic cooling element 6.

With such a configuration, when the humid air taken in through the intake port 2 passes through the cooling body 20 joined to the electronic cooling element 6, it reaches a dew point and moisture in the air is removed. The dehumidified air cools the heat radiator 7, becomes dry air, and passes through the exhaust port 3.
more excreted.

Normally, the air passing through the cooling body 20 is caused to undergo natural convection using the heat generated by the heat sink 7 provided above the electronic cooling element 6 and the power transformer 11 .

When the humidity is high (relative humidity 70 to 85%), the air flow control device 9 operates based on the detection signal of the humidity sensor 10, and when the air blower 5 is operated and the forced convection reaches 0, the cooling body Since the amount of air passing through the cooling body 20 increases, the amount of dew condensation on the cooling body 20 increases and the dehumidification ability improves. Furthermore, the heat radiation effect of the heat sink 7 is also enhanced.

[Problem that the invention seeks to solve]

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 increases, so the amount of dew condensation on the cooling body 20 increases and the dehumidification ability is improved. On the other hand, the side effect is that the amount of Bl taken from the air by the cooling body 20 increases and the temperature of the cooling body 20 rises (Fig. 5), which reduces the amount of dew condensation on the cooling body 20 and lowers the dehumidifying ability. was there. Therefore, even if the amount of air blown by the blower 5 is increased during forced convection, the dehumidifying ability can only be improved by the difference between these effects and side effects.
The dehumidification ability was improved only about twice as much as when using natural convection.

Furthermore, the temperature of the heat sink 7 also decreased, resulting in a decrease in the heat dissipation effect (Fig. 6).

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

[Means for solving problems]

The dehumidifier control device of the present invention includes: a casing forming a ventilation passage having an exhaust port and an intake port; a cooling body disposed within the ventilation passage; an electronic cooling element having a cooling section joined to the cooling body; A blower that circulates air in the space to be dehumidified through the ventilation path, a humidity sensor that detects the humidity in the space to be dehumidified, and an air flow rate that increases or decreases the air flow rate of the blower depending on the level of humidity detected by the humidity sensor. The device includes a control device and a voltage control device that increases or decreases the voltage applied to the electronic cooling element in accordance with the increase or decrease in the amount of air blown by the blower.

[Effect]

According to the structure of the present invention, since the voltage control device is provided that increases or decreases the voltage applied to the electronic cooling element in accordance with the increase or decrease in the air flow rate of the blower, the voltage applied to the electronic cooling element is increased or decreased when the air flow rate of the blower increases. By increasing the temperature, the temperature of the cooling body is lowered and the amount of dew condensation on the cooling body is increased, thereby negating the side effects that conventional dehumidifiers have during forced convection, and improving the dehumidification ability.

In other words, in conventional dehumidifiers, increasing the amount of air blown by the blower increases the amount of air passing through the cooling body, which increases the amount of dew condensation on the cooling body and improves the dehumidifying ability. This has the side effect of reducing the amount of dew condensation on the cooling body due to an increase in the amount of heat removed from the air and raising the temperature of the cooling body, thereby reducing the dehumidifying ability, but this side effect can be negated. Therefore, the dehumidifying ability during forced convection can be further improved.

Further, since the temperature of the heat radiator increases and the heat radiating effect is enhanced, the temperature of the cooling body further decreases, and the dehumidification ability during forced convection can be improved.

〔Example〕

An embodiment of the present invention will be described based on FIGS. 1 and 2.

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

This dehumidifier control device has the following configuration.

The casing 1 forms a ventilation passage 4 in which an exhaust port 3 and an intake port 2 are located above and below, and a heat radiator 7 and a cooling body 20 are arranged one above the other within this ventilation passage 4. In the electronic cooling element 6, a heat generating part 6b and a cooling part 6a are joined to a heat radiating body 7 and a cooling body 20 via a heat conductor 8. The blower 5 circulates air in the space to be dehumidified through the ventilation path 4, and the amount of air blown is increased or decreased by the air amount control device 9 depending on the level of humidity in the space to be dehumidified detected by the humidity sensor 10.

The voltage control device 29 increases or decreases the voltage applied to the electronic cooling element 6 in accordance with an increase or decrease in the amount of air blown by the blower 5 .

The difference between the dehumidifier control device of this embodiment and the conventional example is the increase/decrease in the amount of air blown, that is, the operation of the blower 5.

The point is that a voltage control device 29 is provided that increases or decreases the voltage applied to the electronic cooling element 6 in accordance with the stoppage.

As shown in FIG.
It is housed inside the storage space 21 together with the control devices M and 9.

As shown in FIG. 2, this voltage control device 29 is a switching device that connects either a high-voltage side terminal 11a provided on the secondary side of the power transformer 11 or a low-voltage terminal 11b to the input end of a DC power supply device 270. Contact point 29a.

Consisting of 29b. The switching contacts 29a, 29b are linked to the output contact 26 of the air flow rate control device 9, and are connected to the high voltage side terminal 11a in response to turning the output contact 26 on or off.

By switching the connection to the low voltage side terminal flb, the voltage applied to the electronic cooling element 6 is switched between high and low.

Since the other parts are the same as those of the conventional example, the same parts are given the same reference numerals and the explanation will be omitted.

With such a configuration, when the space to be dehumidified becomes highly humid and the blower 5 starts operating to create forced convection, the voltage applied to the electronic cooling element 6 is simultaneously increased, so that the forced operation of the conventional dehumidifier is prevented. The temperature of the cooling body 20 is lower than that of the conventional dehumidifier, and the side effects of the conventional dehumidifier described above are negated and the dehumidification ability is improved.

Furthermore, since the temperature of the heat radiator 7 rises, the radiator #A effect increases compared to when the conventional dehumidifier is forced to operate, and the temperature of the cooling body decreases, improving the heat removal ability.

In the embodiment described above, the air flow rate control device 9 switches the operation and stop of the air blower 5 according to the level of humidity detected by the M degree sensor lO, but it also switches the fan of the air blower 5 depending on the level of the humidity. The rotation speed of the fan of the blower 5 may be controlled to be high or low. In this case, the voltage control device 29 may be controlled according to the high or low rotation speed of the fan of the blower 5, that is, the increase or decrease of the air flow rate of the blower 5.
The voltage applied to the electronic cooling element 6 is increased or decreased. The applied voltage may be increased or decreased in steps or continuously.

In the above embodiment, a switching type between natural convection and forced convection is used, but it is also possible to use only forced convection. In that case, the exhaust port 3 and the intake port 2 do not need to be provided above and below, and the heat dissipation body 7 and the cooling body The same applies to 20.

In the embodiment described above, the heat sink 7 does not need to be placed inside the casing 1.

〔Effect of the invention〕

According to the dehumidifier control device of the present invention, the sending I! Since we have installed a voltage control device that increases or decreases the voltage applied to the electronic cooling element in accordance with the increase or decrease in the airflow volume of the blower, the temperature of the cooling body can be adjusted by increasing the voltage applied to the electronic cooling element when the airflow volume of the blower increases. It is possible to improve the dehumidification ability by lowering the nII and increasing the nII to the cooling body, thereby negating the side effects that conventional dehumidifiers had during forced convection.

That is, in conventional dehumidifiers, increasing the amount of air blown by the blower increases the amount of air passing through the cooling body, which increases the amount of condensation on the cooling body and improves the dehumidification ability. The amount of heat taken from the air by the cooling body increases and the temperature of the cooling body rises, which has the side effect of reducing the amount of condensation on the cooling body and reducing the dehumidifying ability, but it is possible to counteract this side effect. can. Therefore, the dehumidifying ability during forced convection can be further improved.

In addition, since the temperature of the heat sink increases and the heat dissipation effect increases, the temperature of the cooling body decreases even more, which increases the temperature of the cooling body during forced convection. You can improve your abilities.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of an embodiment of the present invention, FIG. 2 is a control circuit diagram thereof, FIG. 3 is a vertical cross-sectional view of a conventional dehumidifier, and FIG.
The figure is a control circuit diagram, FIG. 5 is a temperature change diagram of the cooling body, and FIG. 6 is a temperature change diagram of the heat sink. DESCRIPTION OF SYMBOLS 1... Casing, 2... Intake port, 3... Exhaust port, 4... Ventilation path, 5... Air blower, 6... Electronic cooling element, 6a... Cooling part, 6b.・Heating part, 7...
Heat sink, 8... Heat conductor, 9... Air blower! control device, 1
0... Humidity sensor, 11... Power transformer, 20...
... Cooling body, 29... Voltage control device wrinkles Fig. 1; 8F, ¥2 extra Fig. 3 Fig. 4 t71 cultivation required - Fig. 5 t7] conversion 8% y, 藺 Fig. 6

Claims (1)

[Claims] A casing in which a ventilation passage having an exhaust port and an intake port is formed, a cooling body disposed in the ventilation passage, an electronic cooling element having a cooling part joined to the cooling body, and air in a space to be dehumidified in the ventilation passage. An air blower that circulates, a humidity sensor that detects the humidity of the space to be dehumidified, an air flow rate control device that increases or decreases the air flow rate of the air blower in accordance with the level of humidity detected by the humidity sensor, and an air flow rate control device that increases or decreases the air flow rate of the air blower. A control device for a dehumidifier, comprising: a voltage control device that increases or decreases the voltage applied to the electronic cooling element according to the increase or decrease.