JPH031722Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention comprises a casing forming a ventilation passage connecting an intake port and an exhaust port, and a dehumidifying element using an electronic cooling element built into the casing. This invention relates to an electronic dehumidifying device that is installed inside an electrical panel such as a switchboard and used to keep the interior of the electrical panel at a low level of humidity.

BACKGROUND OF THE INVENTION Electronic dehumidifiers of this type are often used as dew condensation prevention devices in place of heating devices. That is, by dehumidifying, the root cause of dew condensation is removed.

Problems to be solved by the invention However, since conventional electronic dehumidifiers do not have a heat retention function, they have the following problems.

In cold regions where low temperatures persist for long periods of time, it is necessary to keep the inside of electrical panels such as switchboards warm, but as mentioned above, conventional electronic dehumidifiers do not have a heat retention function, so it is necessary to keep the inside of the panel warm. Cannot be heated.

That is, it was virtually impossible to use it in cold regions.

The purpose of this invention is to solve the problems of the prior art.

Means for Solving the Problems The technical means (structure of the invention) taken by this invention to solve the above problems are as follows.

That is, the dehumidification device of this invention includes a casing forming a ventilation passage connecting an intake port and an exhaust port, a dehumidification element using an electronic cooling element built into the casing, and a temperature switch that operates at a temperature below a predetermined temperature. It is equipped with a heat-retaining heater that operates in response to the operation of this temperature switch.

Effect According to the configuration of this invention, there are the following effects.

In cold regions, when the ambient temperature falls below a predetermined temperature, a temperature switch is activated, and based on this, a heat-retaining heater is activated, thereby protecting electrical panels such as switchboards from low-temperature abnormalities.

That is, the dehumidifying device of this invention can be used under conditions where the temperature remains low for a long period of time, such as in a cold region, or under conditions where the temperature becomes extremely low even for a short period of time.

Embodiment An embodiment of this invention will be described based on FIGS. 1 and 2. FIG. 1 is a circuit diagram of the dehumidifying device, and FIG. 2 is a longitudinal sectional view of the dehumidifying device.

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

5 is an electronic cooling element (Peltier element) whose cooling part 5a is joined to a cooling body 6 with cooling fins arranged near the intake port 2 in the ventilation passage 4; 7 is a ventilation element on the side of the exhaust port 3 from the electronic cooling element 5; A heat radiator 8 arranged in the path 4 is a heat conductor that connects the heat radiator 7 and the heat generating portion 5b of the electronic cooling element 5.

These electronic cooling element 5, cooling body 6, heat dissipation body 7
The heat conductor 8 constitutes a dehumidifying element E.

Further, reference numeral 9 denotes a power transformer built into the casing 1 above the heat sink 7, and this power transformer 9 is for driving the electronic cooling element 5.

A rectifier 10 is connected to the power transformer 9 and supplies direct current to the electronic cooling element 5. This rectifier 10 is mounted on a printed circuit board 11 together with a capacitor C.

12 is a drainage channel formed in the casing 1 below the cooling body 6, and this drainage channel 12 is connected to the water receiver 1.
3 and a drainage hose 14 connected thereto.

A power fuse 15 is installed at the bottom of the resin casing 1b.
A storage space 17 for the rectifier 10 is formed in the upper part, and a storage space 18 for the rectifier 10 is formed in the upper part.

The storage space 18 of the rectifier 10 is located below the dehumidification element E, and this storage space 18
, a printed circuit board 11 on which a rectifier 10, a capacitor C, etc. are mounted is mounted.

The power transformer 9 is attached to the ear portion 8a at the upper end of the heat conductor 8. The power fuse 15 is detachably attached to the bottom plate 20 of the resin casing 1b.

A temperature switch 21 that operates at a temperature below a predetermined temperature is attached to the bottom plate 20 of the resin casing 1b so as to be exposed to the outside.

The temperature switch 21 is inserted into a power supply circuit of a heat-retaining heater 22 installed in an electrical panel such as a switchboard, as shown in FIG.

In addition, in the figure, 16 is a spacer, and 19 is a power lamp.

Next, the operation will be explained.

When the humid air taken in through the intake port 2 passes through a cooling body 6 connected to an electronic cooling element 5, 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.

When the ambient temperature falls below a predetermined temperature, the temperature switch 21 is turned on and the heat-retaining heater 22 is energized to generate heat to keep the inside of the electrical panel warm, thereby protecting the electrical panel from low-temperature abnormalities.

According to this embodiment, in addition to the effects achieved by the configuration of the invention described above, there are the following advantages.

Since the temperature switch 21 is provided at the lowest end of the casing 1, the distance from the power transformer 9, heat radiator 7, and heat conductor 8, which are relatively high in temperature, is large, and the temperature switch 21 is not affected by their thermal effects. , low temperature detection can be performed more accurately and quickly compared to the case where it is installed at the top.

Effect of invention This idea has the following effects.

In cold regions, when the ambient temperature falls below a predetermined temperature, the temperature switch is activated, and based on this, the insulation heater is activated and generates heat, so it keeps electrical panels such as switchboards warm and protects them from low-temperature abnormalities. I can do it.

That is, the dehumidifying device of this invention can be used under conditions where the temperature is low for a long period of time, such as in a cold region, or under conditions where the temperature is extremely low even for a short period of time.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of a dehumidifying device according to an embodiment of this invention, and FIG. 2 is a longitudinal sectional view of the dehumidifying device. DESCRIPTION OF SYMBOLS 1... Casing, 2... Intake port, 3... Exhaust port, 4... Ventilation path, 5... Electronic cooling element, 5a...
...Cooling part, 5b... Heat generating part, 6... Cooling body, 7...
... Heat radiator, 8 ... Heat conductor, 21 ... Temperature switch, 22 ... Heat retention heater, E ... Dehumidification element.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A casing that forms a ventilation path connecting an intake port and an exhaust port, a dehumidifying element that uses an electronic cooling element built into this casing, and a temperature switch that operates below a predetermined temperature. and a heat-retaining heater that operates in response to the operation of this temperature switch. (2) The dehumidifying element includes the electronic cooling element, which has a cooling body joined to the cooling section, and the electronic cooling element, which is arranged near the air intake port in the ventilation passage, and the electronic cooling element is arranged closer to the exhaust port in the ventilation passage. The dehumidifying device according to claim 1, which is a registered utility model, and comprises a heat radiator and a heat conductor that connects the heat radiator and the heat generating part of the electronic cooling element. (3) Utility model registration claim No. (1) in which the temperature switch is located at the lower end of the casing.
Dehumidifier as described in section.