JP3235379B2 - 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 electronic dehumidifier using a Peltier effect element (hereinafter, referred to as a Peltier element), and more particularly to a power supply for the same.

[0002]

2. Description of the Related Art Conventionally, this type of electronic dehumidifier energizes a Peltier element provided in a case, cools and dehumidifies air in a dehumidifying space sucked into the case, and exhausts the dehumidified air into the dehumidifying space. This space is electronically dehumidified.

[0003] Therefore, it is possible to perform dehumidification for a long period of time, which is suitable for dehumidification of various equipment and devices in which electronic circuits and the like are incorporated. Used for If the dehumidifying space is large, dehumidification is performed using a plurality of such electronic dehumidifiers.

[0004]

The above-mentioned conventional electronic dehumidifier is provided with an AC or DC power receiving terminal block in order to secure a power supply necessary for supplying power to the Peltier element. When the Peltier device or the like operates at 5 V DC, wiring from a 100 V AC or 5 V DC power supply is connected to the power receiving terminal block, for example.

[0005] Therefore, there is a problem that complicated wiring work is required, and as the number of used cables increases, much labor and time are required. For example, in the case of dehumidifying the interior of each lighting pole of a road facility, even if one electronic dehumidifier is provided for each lighting pole, an extremely large number of wiring work of the electronic dehumidifier is required for the entire facility, and the work has to be performed. Simplification is desired.

[0006] In a switchgear of electric power equipment, the larger the size of the switchgear, the larger the dehumidifying space, and the wiring work for a large number of electronic dehumidifiers is required. It is an object of the present invention to secure a necessary power supply by using a current transformer having a wiring in a dehumidifying space as a primary coil, and to eliminate wiring work.

[0007]

In order to achieve the above object, the present invention provides a method for energizing a Peltier effect element in a case.
Electronic dehumidifier for dehumidifying a dehumidifying space provided with the case
In humidifier, contact the case both end faces in the case
A U-shaped magnetic core, which is provided to touch and has a secondary coil wound thereon, is located outside the case, and both ends are screwed.
Coupled <br/> more end faces of the magnetic core interposed said casing, a connecting fitting which forms a closed magnetic path by said magnetic core and said screw, located outside of the casing, the cable
Sandwiched scan and said connecting fitting, wherein the wiring of the closed magnetic path through the interconnection of the primary coil, the magnetic core,
The power supply includes a current transformer for the power source formed by the secondary coil, the connection fitting, and the screw .

[0008]

In the case of the electronic dehumidifier of the present invention configured as described above, the connecting metal fittings on the outside of the case are mounted on both end surfaces of the U-shaped magnetic core in the case to form a split-type current transformer for power supply. Is done. At this time, an annular closed magnetic path is formed by the connection fitting and the magnetic core.

Further, wiring outside the case penetrates the closed magnetic path, and this wiring forms a primary coil of the current transformer for power supply. Then, the power supply of the Peltier element is generated in the secondary coil of the magnetic core by passing the current through the wiring.

Therefore, the necessary power source can be secured only by a simple operation of connecting the connecting fitting from the outside of the case to the magnetic core in the case without performing wiring work as in the conventional product, and the workability is improved. In particular, a remarkable effect is obtained when a plurality is used.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described with reference to FIGS. (1 embodiment) First, a case where the present invention is applied to dehumidification inside a lighting pole of a road facility and existing wiring inside a lighting pole is used is shown in FIG.
This will be described with reference to FIG.

As shown in FIG. 5, on a highway or the like, lighting columns 1 are provided at intervals of, for example, 2 km along the road. This lighting column 1 has a base buried in the ground, a door 2 for inspection and the like mounted at an appropriate height on the ground, and an irradiation window for a discharge lamp such as a mercury lamp which illuminates a lower road surface at an upper end. 3 are formed.

Further, for example, a single-phase 100 V
And a pair of feeders 5 and 6 connected to the cable 4 are drawn into the interior of each lighting column 1 from the base side thereof.

The feeders 5 and 6 are connected to a control circuit 7 provided substantially at the position of the door 2 in the lighting column 1, and supply electric power to the mercury lamp 8 at the upper end via the circuit 7.

The control circuit 7 includes an electronic circuit such as a lighting start circuit of the mercury lamp 8, and is easily affected by humidity. Therefore, an electronic dehumidifier 9 is provided on one feeder connected to the control circuit 7, for example, the feeder 5 side.

The dehumidifier 9 is constructed as shown in FIGS. 1 to 4, in which 10 is a feeder 5
Is a vertically long case made of a non-magnetic material, and a mounting piece 11 is formed on the back surface.

Reference numeral 12 denotes an intake hole formed at a lower portion of the front surface of the case 10, 13 denotes an exhaust port formed at the upper surface of the case 10,
Reference numeral 14 denotes a drain hole formed on the lower surface of the case 10, and a drain hose 15 is attached.

Reference numeral 16 denotes a water receiving portion formed below the intake hole 12 in the case 10, 17 denotes a cooling fin provided near the intake hole 12 in the case 10, and 18 denotes a heat absorbing surface attached to the cooling fin 17. The radiating fins 19b are attached to the radiating surface of the Peltier element 18 on the lower front surface of the vertical base plate 19a. Is formed.

Reference numeral 20 denotes a power supply circuit section provided on the back side of the radiation fins 19, which has a rectifying function and the like, and supplies, for example, a 5V DC power supply to the Peltier element 18 and the like. Reference numeral 21 denotes a fan provided above the radiating fins 19 and sends out lower air to the upper exhaust holes 13.

Reference numeral 22 denotes a U-shaped magnetic core provided between the fan 21 and the exhaust hole 13.
, And a secondary coil 23 is wound therearound.

Numeral 24 denotes an Ω-shaped magnetic metal fitting located outside the upper part of the front surface of the case 10. The feeder 5 is located at the center, and both ends of the magnetic core 22 are screwed from the outside of the case 10 by screws 25. It is attached by screwing to both end faces.

Reference numeral 26 denotes a current transformer for power supply formed by the feeder 5, the magnetic core 22, the secondary coil 23, the connection fitting 24, and the screw 25. Reference numeral 27 denotes an Ω-shaped bracket located outside the lower front part of the case 10, and the feeder 5 is located at the center thereof.
Both ends are screwed to the case 10 by screws 28.

The secondary coil 23 is connected to the power supply circuit section 20, and the DC output line of the power supply circuit section 20 is connected to the Peltier element 18 and the fan 21. At the time of installation, the metal fittings 24 and 27 are screwed so that the feeder 5 is sandwiched between the metal fittings 24 and 27 and the front surface of the case 10.

At this time, the magnetic core 22 and the core 22
An annular closed magnetic path is formed by the connection fitting 24 screwed to the feeder 5, and the feeder 5 penetrates the closed magnetic path.

A so-called load current flows through the feeder 5 by supplying power to the control circuit 7, and the current transformer for power supply 26 generates a current source (power supply) in the secondary coil 23 using the feeder 5 as a primary coil. A current source is supplied to the power supply circuit unit 20.

The circuit section 20 processes the supplied current source into a direct current of 5 V, for example, and converts the current into a Peltier element 18 and a fan 2.
1 is fed.

Then, by energizing the Peltier element 18,
The cooling fins 17 are cooled and the radiation fins 19 are heated. Further, the operation of the fan 21 causes a pressure difference in the case 10, and the air in the illumination column 1 introduced into the case 10 from the intake hole 12 is cooled by the cooling fins 17 and the radiation fins 19.
Through the exhaust hole 13 and into the lighting column 1.

At this time, the air cooled and dehumidified by the cooling fins 17 is heated by the radiating fins 19, and
And the inside of the lighting column 1 is dehumidified. In addition, water droplets generated by the cooling and dehumidification are collected by a water receiving unit 16,
The light is discharged from the drain hole 14 to the outside of the lighting column 1 through the drain pipe 15.

Then, the load current of the existing feeder 5 of the lighting column 1 is reduced to 1 by a simple screwing operation of the connecting fitting 24.
A current transformer 26 for a power supply as a secondary current is formed, and a power supply for the Peltier element 18 and the like is obtained from the secondary coil 23 of the current transformer 26.
Workability is significantly improved.

In this embodiment, the fan 21 is provided in the case 10 to increase the amount of suction and exhaust to improve the dehumidifying function. However, the present invention can also be applied when the fan 21 is omitted. Of course.

(Other Embodiment) Next, another embodiment will be described with reference to FIG. FIG. 3 shows a case where a plurality of electronic dehumidifiers are provided by providing a dedicated wiring in a switchgear of a power facility. In the same figure, the same reference numerals as those in FIGS. 1 to 4 denote the same or corresponding components. .

Reference numeral 28 denotes a switch gear frame box having a plurality of electronic dehumidifiers 9 mounted on an inner wall on one side thereof. Reference numeral 29 denotes a single-phase AC power supply of, for example, 100 V outside the box 28, and reference numeral 30 denotes a loop wiring whose both ends are connected to the AC power supply 29.
Of the metal fittings 24, 27.

Reference numeral 31 denotes a switch inserted into the loop wiring 30, and reference numerals 32 and 33 denote a resistor for preventing an inrush current and a capacitor for supplying a reactive current inserted in series with the switch 31 in the loop wiring 30.

In this embodiment, instead of using the existing wiring, a dedicated loop wiring 30 is used, and the metal fittings 24 and 27 of each electronic dehumidifier 9 in the box 28 are screwed. An annular closed magnetic path formed by the magnetic core and the metal fitting 24 in the case 10 of each electronic dehumidifier 9 is connected to the loop wiring 3.
0 penetrates in series.

Next, the switch 31 turns on the dehumidification,
The switch is turned off and the switch 31 is turned on during dehumidification. Each of the electronic dehumidifiers 9 uses the loop wiring 30 as a primary coil, and generates a power supply similar to that of the first embodiment to the secondary winding of each magnetic core based on the current of the wiring 30.

Therefore, in the case of this embodiment, the same effect as that of the first embodiment can be obtained without using the existing wiring. In addition, since the switch 31 is provided, the dehumidifying operation of each electronic dehumidifier 9 can be turned on and off by turning on and off the switch 31. For example, each electronic dehumidifier 9 can be turned on and off by a signal from a humidity sensor provided in the box 28. The dehumidifier 9 can be operated by automatically supplying power only when necessary, and power can be saved.

The resistor 32 prevents the occurrence of an inrush current due to the turning on and off of the switch 31. The capacitor 33 supplies a reactive current to the loop wiring 30 to prevent a short circuit when the loop wiring 30 is in a no-load state for some reason, and to reduce a primary current of the power transformer of each electronic dehumidifier 9. At all times.

The present invention can be applied to an electronic dehumidifier that dehumidifies various indoor and outdoor dehumidifying spaces using a Peltier device. Also, the wiring may be a one-phase wiring of a multi-phase wiring such as a three-phase wiring.

[0039]

Since the present invention is configured as described above, it has the following effects. Case 10
The outer connecting metal fittings 24 are mounted on both end faces of the U-shaped magnetic core 22 in the case 10 to form a split-type power transformer 26. At this time, the connecting metal fitting 24 and the magnetic core 22 form an annular closed magnetic field. A path is formed, and wiring (feeder 5, loop wiring 30) outside the case 10 penetrates the closed magnetic path, and this wiring forms a primary coil of the current transformer 26 for the power supply. A power supply for the Peltier effect element 18 is generated in the secondary coil 23 of the core 22.

Therefore, the necessary power source can be secured only by a simple operation of connecting the connecting fitting 24 from the outside of the case 10 to the magnetic core 22 in the case 10 without performing wiring work as in the conventional device. The workability is improved, and a remarkable effect is exerted, particularly when a plurality is used.

[Brief description of the drawings]

FIG. 1 is a cutaway plan view of one embodiment of the present invention.

FIG. 2 is a cut-away side view of FIG.

FIG. 3 is a perspective view of FIG. 1;

FIG. 4 is a circuit connection diagram of FIG. 1;

FIG. 5 is a schematic view of road equipment provided with the electronic dehumidifier of FIG. 1;

FIG. 6 is a cutaway perspective view of another embodiment of the present invention.

[Explanation of symbols]

 5, 6 Feeder 10 Case 18 Peltier effect element 22 Magnetic core 23 Secondary coil 24 Connection fitting 26 Current transformer for power supply 30 Loop wiring

Claims (1)

(57) [Claims] 1. An electronic dehumidifier for energizing a Peltier effect element in a case to dehumidify a dehumidifying space provided with the case, wherein both ends are provided in the case so as to contact the case, and a secondary coil is provided. And a U-shaped magnetic core wound around the casing, and the casing positioned outside the case and having both ends screwed.
A connecting member connected to both end faces of the magnetic core via a base and forming a closed magnetic path by the magnetic core and the screw ; and a case positioned outside the case, the case and the connecting metal.
Sandwiched doo, the wiring that a closed magnetic circuit through the wiring of the primary coil, the magnetic core, the secondary
An electronic dehumidifier comprising: a coil, the connection fitting, and a power transformer formed by the screw .