JPH05736Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to a dehumidification device that uses a combination of natural convection and forced convection using an electronic cooling element or the like.

(Prior Art) Conventionally, this type of dehumidification device includes a casing in which a ventilation passage is formed, a fan that generates airflow in the ventilation passage, and a dehumidification means that has an electronic cooling element and is provided in the ventilation passage. Some devices include a humidity sensor attached to the casing and a dehumidification control device that drives a fan based on a detection signal from the humidity sensor.

According to this dehumidifier, when the humidity exceeds a set value, the fan is driven to dehumidify the dehumidifying space by forced convection, and when the humidity falls below the set value, the fan is stopped and dehumidification is performed only by natural convection. .

(Problems to be Solved by the Invention) However, in the dehumidifying device described above, since the humidity setting value at which the fan starts to be driven is fixed, it is not possible to operate the dehumidifying device to obtain a humidity that is appropriate for the purpose of use.

Therefore, for example, it is necessary to prepare different types of dehumidifiers depending on whether the purpose is to prevent dew condensation or to prevent rust.

The purpose of this invention is to provide a dehumidifying device that can be operated at a humidity level that corresponds to the purpose of installation.

(Means for solving the problem) The dehumidification device of this invention has a ventilation passage in which the exhaust port is higher than the intake port, and a dehumidification means is provided in the ventilation passage, so that it can constantly dehumidify through natural convection. A cooling section for dehumidification is placed near the intake port, a heat dissipation section for heating and natural convection is placed near the exhaust port, and there is also a fan for forced convection in the ventilation path, which can be controlled by a switch. A control device is provided that controls the driving point of the forced convection fan using a humidity sensor that can change set values at multiple points.

(Function) According to the configuration of this invention, when the humidity is lower than the set value, the humidity sensor does not output a detection signal, so the fan does not operate, and natural convection occurs due to the heat in the heat dissipation section due to the operation of the dehumidifying means, resulting in cooling. Dehumidification is performed in the chamber, which acts as a humidity retaining function.

When the humidity rises and the humidity sensor operates, the fan is operated, causing forced convection in the ventilation path, and rapid dehumidification is performed, working as a reduction function to reduce the humidity to the set humidity.

Furthermore, when a changeover switch is used to change the humidity setting value of the humidity sensor to a plurality of points, the fan is operated at different humidity levels.

In this way, by providing a changeover switch to change the humidity setting value at which the fan starts driving, the amount of intake air can be set and varied depending on the humidity in the equipment, and the humidity at which forced convection operation starts can be changed to multiple levels simply by operating the changeover switch. Therefore, one device can be operated for various purposes of dehumidification, such as energy-saving operation, dew condensation prevention, rust prevention, and rapid dehumidification.

(Embodiment) An embodiment of this invention will be described based on FIGS. 1 to 4.

FIG. 1 is a longitudinal cross-sectional view of the dehumidifier.

In FIG. 1, reference numeral 1 denotes a vertically elongated casing in which a ventilation passage 4 is formed that connects an intake port 2 at the bottom with an exhaust port 3 at the top.
It is composed of.

5 is a fan mounted near the exhaust port 3 within the casing 1; A is a dehumidifying means provided within the ventilation path 4 and having an electronic cooling element (Peltier element) 6;

A humidity sensor 10 is provided at the lower end of the casing 1,
A dehumidification control device 9 for driving the fan 5 and a changeover switch 26 for changing the set value of the fan drive start humidity of the dehumidification control device 9 are provided above the dehumidification control device 9.

The operation piece 26a of the changeover switch 26 is exposed through the elongated hole 26b on the front of the casing 1 as shown in FIG. It has been applied to

The dehumidifying means A includes a cooling body 20 with a cooling fan disposed in the vicinity of the intake port 2 in the ventilation passage 4, an electronic cooling element 6 in which a cooling part 6a is joined to the cooling body 20, and an exhaust gas from the electronic cooling element 6. It consists of a heat radiator 7 arranged in the ventilation path 4 on the side of the opening 3, and a heat conductor 8 connecting the heat radiator 7 and the heat generating part 6b of the electronic cooling element 6.

11 is a power transformer built into the casing 1 above the heat sink 7, and the electronic cooling element 6
to drive.

The power transformer 11 has an ear portion 8a at the upper end of the heat conductor 8.
It is attached to.

The fan 5 is located above the power transformer 11.

A storage space 21 for the dehumidification control device 9 is formed in the lower part of the resin casing 1b of the casing 1, and a storage space 22 for the rectifier 17 is formed in the upper part.

A fan control printed circuit board 15 constituting the dehumidification control device 9 is installed in the storage space 21, and a power supply fuse 18 and the changeover switch 26 are mounted thereon.

In the storage space 21 of the dehumidification control device 9, a heat insulating space 23 is formed between the printed circuit board 15 and the bottom plate 16 of the resin casing 1b.

The humidity sensor 10 is attached to the bottom plate 16 so as to be exposed outside the casing 1.

In the storage space 22 for the rectifier 17, a printed circuit board 24 on which the rectifier 17, a capacitor (not shown), and the like are mounted is mounted. 25 is a power lamp.

12 is the casing 1 below the cooling body 20
This drainage channel 12 is composed of a water receiver 13 and a drain hose 14 connected to the water receiver 13 in communication with the water receiver 13.

FIG. 3 shows an electrical circuit diagram of the dehumidification control device A.

The changeover switch 26 is used to switch between the partial voltage resistors R1 and R2 for changing the sensitivity of the humidity sensor 10, and each of the partial voltage resistors R1 and R2 can be adjusted independently to obtain a desired humidity setting value, so it is very easy to use. Accurate humidity settings can be obtained.

The dehumidification control device 9 includes a changeover switch 26, a level detection circuit 28 such as a Schmitt circuit, a voltage amplification circuit 29, and a relay coil 30 and relay contact 30a that turn the fan 5 on and off.

31 is the power supply for the fan 5, 32 is the humidity sensor 10
This is the power terminal.

As shown in FIG. 4, the humidity sensor 10 uses a sensor whose resistance value decreases as the humidity increases, and the partial voltage resistance is, for example, as shown in FIG.
Humidity sensor 10 when humidity is 85% and 75%
The resistance values are set accurately so that the level detection circuit 28 outputs a fan start signal in response to the signal.

Next, the operation of the above configuration will be explained.

When the humid air taken in through the intake port 2 passes through the cooling body 20 connected to the electronic cooling element 6, it reaches the dew point and moisture in the air is removed, and the dehumidified air cools the heat radiating body 7 and becomes dry air. Exhaust port 3
more excreted.

When the humidity is lower than the set value set by the changeover switch 26, 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 set value is exceeded, the fan 5 is driven to perform forced air blowing, so that the amount of air passing through the cooling body 20 increases, and the heat dissipation effect of the heat dissipation body 7 is enhanced, so that the dehumidification function is enhanced.

Dehumidification is carried out in this way, but since a switch 26 is provided for changing the humidity setting value to start driving the fan 5, the humidity at which forced convection operation starts can be switched to two stages simply by operating the switch 26. . Therefore, depending on the purpose of installation, such as preventing dew condensation or rust prevention, it is possible to easily switch to the desired humidity level and operate at the site.

In the above embodiment, the changeover switch 26 is provided between the humidity sensor 10 and the voltage dividing resistors R1 and R2, but the changeover switch 26 may be a switch for changing the detection level of the level detection circuit 28.

(Effects of the invention) In the dehumidifying device of this invention, when the humidity is low, the humidity sensor does not output a detection signal, so the fan does not operate, and natural convection occurs due to the heat in the heat dissipation part due to the operation of the dehumidifying means, resulting in cooling. Since dehumidification is performed in the air, it functions as a humidity maintenance function, and when the humidity rises and the humidity sensor is activated, the fan is operated and the ventilation path becomes forced convection, resulting in rapid dehumidification, reducing the humidity to the set humidity. By switching the changeover switch, which acts as a reduction function and changes the humidity setting value of the humidity sensor, the fan is operated at a different humidity.

By providing a changeover switch that changes the humidity setting value at which the fan starts operating, the amount of intake air can be set and varied depending on the humidity within the facility, and the humidity at which forced convection operation starts can be set in multiple stages and accurately by simply operating the changeover switch. Since the setting value can be switched to a suitable setting value, it is possible to operate according to various dehumidification purposes such as energy saving operation, dew condensation prevention, rust prevention, rapid dehumidification, etc.

[Brief explanation of drawings]

Figure 1 is a longitudinal sectional view of one embodiment of this invention;
The figure is a partial front view of the same, FIG. 3 is an electric circuit diagram of the dehumidifying device, and FIG. 4 is a characteristic diagram of the humidity sensor. DESCRIPTION OF SYMBOLS 1... Casing, 2... Intake port, 3... Exhaust port, 4... Ventilation path, 5... Fan, 6... Electronic cooling element, 6a... Cooling part, 6b... Heat generating part, 7...
... heat radiator, 8 ... heat conductor, 9 ... dehumidification control device,
10... Humidity sensor, 26... Changeover switch.

Claims (1)

[Scope of Claim for Utility Model Registration] A casing in which a ventilation passage is formed in which the exhaust port is located higher than the intake port, a cooling unit for dehumidification at a position close to the intake port in the ventilation passage, and an exhaust gas from the ventilation passage. a dehumidifying means provided with a heat dissipation section for heating and natural convection near the mouth; a fan generating airflow in the ventilation path; a humidity sensor attached to the casing; A dehumidification device comprising: a dehumidification control device for driving the fan; and a changeover switch provided in the dehumidification control device for switching a humidity setting value for starting the fan at a plurality of points.