JP2511533Y2 - Electrical equipment - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric device equipped with a noise filter for reducing a noise terminal voltage generated in an electric cooker or the like.

[0002]

2. Description of the Related Art In recent years, as electronic equipment has become high-tech, noise generated by electric equipment adversely affects other electronic equipment, so that regulations regarding noise terminal levels have become strict. In order to reduce the noise terminal voltage level generated by electric equipment, a noise filter disclosed in Japanese Utility Model Publication No. 55-44412 is generally provided between the electric equipment and the commercial power source. For the choke coil that makes up the noise filter,
A current equivalent to that of electrical equipment flows, causing self-heating due to the current, raising the temperature of the noise filter. If the diameter of the electric wire forming the choke coil is increased in order to reduce this self-heating, the shape of the noise filter becomes large and the cost increases.

[0003]

The noise filter for reducing the noise terminal voltage of the device is made small in temperature rise due to self-heating, and the noise filter is downsized and its reliability is improved.

[0004]

[MEANS FOR SOLVING THE PROBLEMS] Storage and arrangement of electric parts
With an exterior having an intake port and the intake port inside the exterior
They are placed close to each other and suck the cooling air from the intake port
A cooling fan that cools the parts and a choke that connects to a commercial power source.
A noise filter consisting of choke coil及beauty capacitor, and Roh <br/> Izufuiruta mounting substrate, take the noise filter
It includes a noise filter unit comprising a casing having a vent brewing covering a noise filter to give, the, the noise
The filter is located close to the intake port on the outer surface of the exterior.
It is a configuration to be placed in.

[0005]

[Function] A noise filter unit is attached to the outer surface of an electric device that is less affected by unnecessary radiant waves radiated from the electric device and heat, and heat generated by self-heating due to the current flowing through the noise filter To improve the heat dissipation effect by transmitting to the exterior of the electric device.
Further, since the case of the noise filter unit is provided with the ventilation port and is attached close to the intake port on the outer surface of the exterior, the heat radiation effect of the noise filter is further improved.

[0006]

1 and 2 show a mounting structure of a noise filter unit of the present invention, 1 is a cooker main body, 2 is a cooker main body 1, and an electric equipment room for accommodating and arranging electric components, 3 Is a magnetron that is provided in the electrical equipment chamber 2 and supplies microwaves to the heating chamber; 4 is a high voltage transformer that supplies a high voltage to the magnetron 3; 5 is a cooling fan that cools electric components such as the magnetron 3 and the high voltage transformer 4; 6 is a partition plate that separates the intake side and the exhaust side of the cooling fan 5, 7 is an opening provided on the exterior (rear wall) of the cooker body 1 for sucking cooling air to the cooling fan 5, and 8 is an opening 7 2 is a noise filter unit provided on the outer surface of the cooking device, and 9 is a power cord connected to the noise filter unit.

FIGS. 3 and 4 show the structure of the noise filter unit 8 of the present invention and the electric circuit of the cooking device to which the noise filter is connected. Reference numeral 10 denotes a common mode choke coil 11 connected to a power cord 9, and Capacitor 12,
A noise filter consisting of 13 and 14 are noise filter mounting boards made of metal. The mounting board 14 has terminals 1 for connecting the noise filter 10 to the high-voltage transformer 4.
An insulating terminal block 16 having 5 is arranged. Reference numeral 17 denotes an insulating member provided on the mounting board 14. The insulating member 17 is made of synthetic resin such as epoxy resin or mica sheet, and constitutes the noise filter 10 (common mode choke coil). 11 and the capacitors 12, 13), and the noise filter 1
The heat generated within 0 is transferred to the mounting substrate 14. 1
Reference numeral 8 is a synthetic resin case that covers the noise filter 10. The case 18 is provided with cooling air vents 19 and 20.

As described above, the noise filter unit 8 is provided on the outer surface of the exterior of the cooking device 1 which is less likely to be affected by unnecessary radiation waves radiated from the cooking device and heat generated in the cooking device.
At the same time, the heat generated by the self-heating of the noise filter 10 is conducted to the exterior of the cooking device via the mounting substrate 14 to be radiated. Further, since the noise filter unit 8 is installed close to the cooling air passage of the electric component, the heat generated inside the noise filter unit 8 can be efficiently released.

The present invention is not limited to the electric cooker as in the embodiment, but can be applied to various electric appliances equipped with a noise filter.

[0010]

The electrical device external surface impact is small in temperature rise of the electrical device, according to the invention], is attached noise filter unit, the heat generated in the self-heating of the noise filter, through the Roh Lee <br/> Zufuiruta mounting bracket, Dissipates heat by conducting heat to the exterior of electrical equipment. Further , by installing the noise filter unit having the ventilation hole in the case covering the noise filter close to the intake port on the outer surface of the exterior , heat generated in the noise filter unit can be efficiently radiated.
Therefore, the reliability of the noise filter is improved and
It can be miniaturized and provided at low cost.

[Brief description of drawings]

FIG. 1 is a side sectional view of an electric cooker embodying the present invention.

FIG. 2 is a perspective view of a main part of a noise filter unit mounting portion of the present invention.

FIG. 3 is a partially cutaway perspective view of the noise filter unit of the present invention.

FIG. 4 is an electric circuit diagram of a cooker embodying the present invention.

[Explanation of symbols]

 8 Noise Filter Unit 9 Power Cord 10 Noise Filter 11 Choke Coil 14 Mounting Board 17 Insulation Member 18 Case

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Chizuru Konishi 2-18 Keihan Hondori, Moriguchi Sanyo Electric Co., Ltd. (56) References 63-61187 (JP, U) Actual 56-97855 (JP, U) Actually open 62-53718 (JP, U)

Claims (1)

(57) [Scope of utility model registration request] 1. An intake port for accommodating and arranging electrical parts
An exterior having, and arranged in proximity to the intake port in the exterior,
Cooling air is taken in from the intake port to cool the electric parts.
A cooling fan, Cho connected to a commercial power source - the noise filter consisting of choke coil及beauty co <br/> capacitor, the noise filter
Comprising a noise filter mounting substrate for mounting a noise filter unit comprising a casing having a vent brewing covering over SL noise filter, and the noise filter
An electric device, wherein the electric device is arranged at a position close to the intake port on the outer surface of the exterior .