KR19990084996A - Microwave oven with integrated PCB panel - Google Patents

Abstract

The disclosed microwave oven relates to a microwave oven having an integrated PCB panel in which a plurality of PCB panels on which various circuit components are mounted are unified into one panel to improve their assemblability. The present invention provides a microwave oven for driving a load by inputting a commercial AC power supply to generate a predetermined direct current through a low voltage transformer, wherein the first circuit part and the commercial AC power supplying the DC power of the low voltage transformer are supplied. The second circuit portion to be formed integrally with the PCB panel on the back of the operation panel. Here, the connection between the first circuit portion and the second circuit portion is preferably patterned on the PCB panel. Accordingly, by unifying a plurality of PCB panels on which various circuit components are mounted into one panel, a plurality of connectors and wirings can be eliminated to improve their assemblability and to reduce production costs.

Description

Microwave oven with integrated PCB panel

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microwave oven, and more particularly, to a microwave oven having an integrated PCB panel in which a plurality of PCB panels on which various circuit components are mounted are unified into one panel to improve their assemblability.

In general, a microwave oven is a device for heating / cooking food using microwaves. FIG. 1 is a perspective view showing an appearance of a general microwave oven, and FIG. 2 is a perspective view showing main parts of the device chamber of FIG. 1.

According to FIG. 1, a cabinet 1 is divided into a left and right space to form an external shape of a microwave oven, and a cooking chamber 2 having an open front on one side thereof is provided, and an apparatus chamber 3 on which various electrical appliances are installed on the other side thereof. 2). In addition, the door 4 that opens and closes the front of the cooking chamber 2 is rotatably fixed to one side of the cabinet 1.

The cooking chamber 2 is provided with a rotary plate 5 on which the food to be cooked is placed on its bottom surface, and the rotary plate 5 is composed of motors and gears not shown on the bottom thereof. The rotary plate 5 is rotated. On the other hand, an operation panel 10 is provided on the front surface of the apparatus chamber 3 to operate the microwave oven and display the state thereof.

2, the first PCB panel 12 having various circuit elements operated by a DC power supply is fixed to the rear surface of the operation panel 10, and a variety of circuit elements are mounted on an upper end of the cooling fan guide 16 to be described later. The second PCB panel 13 to which circuit elements such as a noise filter and a fuse operated by a commercial AC power supply is mounted is fixed.

In addition, the second PCB panel 13 is electrically interconnected with the first PCB panel 12 by using a wire 15 and a connector 14 having a predetermined length, and a commercial AC voltage input from the outside is applied to a power source. It is applied to the second PCB panel 13 via a line 17.

In addition, the apparatus chamber 3 is provided with a magnetron (MGT) for generating microwaves, a high voltage transformer (HVT), a high pressure capacitor (HVC), and the cooling fan (not shown) for cooling the magnetron (MGT). Electrically connected.

Here, the cooling fan (not shown) is rotatably fixed to the inside of the guide 16 surrounding it, and by forcibly blowing outside air, the magnetron (MGT), high voltage transformer (HVT), high pressure capacitor (HVC) ) And so on.

The function of the conventional microwave oven configured as described above is that the cooking chamber containing food or food in the state in which the cooking chamber 2 is opened by the door 4 being opened by a user through the front of the cabinet 1. It is put inside and placed on top of the rotating plate (5).

Thereafter, the microwave oven is operated as the user operates the manipulation panel 10 while the door 4 is closed. That is, the user sets a cooking time according to the amount and type of food and inputs a start key (not shown) to operate the microwave oven.

When the operation of the microwave is started as described above, the high voltage transformer HVT supplies a high voltage to the magnetron MTG, and the magnetron MTG generates microwaves of a predetermined frequency (2450 MHz) to be emitted into the cooking chamber 2. By doing this, a predetermined cooking operation is performed.

In addition, the cooling fan 9 cools the magnetron (MGT) and the high-voltage transformer (HVT), the high-voltage capacitor (HVC) and the high-voltage diode (not shown) in the apparatus chamber 3, and rotates the plate ( 5) rotates the food so that the microwave is evenly incident.

Here, since the circuit parts mounted on the second PCB panel 13 are mainly composed of a noise filter and a fuse operated by a commercial AC power source, the power input through the power line 17 from the outside is the second PCB panel ( 13) the filtering and the overcurrent blocking function are performed, and the first PCB panel 12 and the high voltage transformer HVT are applied to perform the predetermined function.

The first PCB panel 12 is applied with a predetermined DC power generated through a low voltage transformer (not shown) to drive the circuit elements mounted thereon. Accordingly, the second PCB panel 13, the first PCB panel 12, the high voltage transformer (HVT), and various electrical devices configured as described above are electrically connected to each other through a plurality of wirings 15 and connectors 14. To lose.

However, such a conventional microwave oven has to manufacture and fix the first PCB panel and the second PCB panel, respectively, in a separate position, and various electrical devices including the first and second PCB panels are interconnected by a plurality of wires. Since the connection is complicated, the assembly labor is many and the assembly process is complicated, there is a problem that the productivity is reduced.

In addition, each of the first and second PCB panels must be manufactured separately, and a number of components such as wiring and connectors that connect to each other have been required, resulting in other manufacturing cost increases.

Therefore, the present invention has been made in order to solve the above-mentioned conventional problems, and its object is to unify a plurality of PCB panels on which various circuit components are mounted into a single panel to improve its assemblability and to produce a production cost. It relates to a microwave oven having an integrated PCB panel to reduce the cost.

1 is a perspective view showing the appearance of a typical microwave oven,

2 is a perspective view illustrating main parts of the apparatus chamber of FIG. 1;

Figure 3 is a perspective view of the main portion showing a preferred embodiment of a microwave oven having an integrated PCB panel according to the present invention.

Explanation of symbols on the main parts of the drawings

14 connector 15 wiring

100: PCB panel 110: first circuit portion

120: second circuit portion

A characteristic of the microwave oven according to the present invention for realizing this is that in a microwave oven for driving a load by inputting a commercial AC power supply, and generating a predetermined DC through a low voltage transformer, the DC power supply of the low voltage transformer is supplied. The first circuit unit and the second circuit unit to which the commercial AC power is supplied are integrally formed on the PCB panel on the rear surface of the operation panel.

Here, the connection between the first circuit portion and the second circuit portion is preferably patterned on the PCB panel.

Accordingly, by unifying a plurality of PCB panels on which various circuit components are mounted into one panel, a plurality of connectors and wirings can be eliminated to improve their assemblability and to reduce production costs.

Hereinafter, a preferred embodiment of the automatic load detecting apparatus for a microwave oven according to the present invention will be described in detail with reference to the accompanying drawings.

Figure 3 is a perspective view of the main portion showing a preferred embodiment of a microwave oven having an integrated PCB panel according to the present invention.

Accordingly, the apparatus chamber 3 is provided with a magnetron (MGT), a high voltage transformer (HVT), a high pressure capacitor (HVC) for generating microwaves, and the cooling fan (not shown) for cooling the magnetron (MGT). Is electrically connected.

Here, the cooling fan (not shown) is rotatably fixed to the inside of the guide 16 surrounding it, and by forcibly blowing outside air, the magnetron (MGT), high voltage transformer (HVT), high pressure capacitor (HVC) ) And so on.

In addition, the PCB panel 100 is provided on the rear surface of the operation panel 10, in which the first circuit unit 110 mounted with various circuit elements operated by a DC power supply and a noise filter and a fuse operated by a commercial AC power supply. The second circuit portion 120 to which the circuit element of is mounted is integrally formed. Here, the connection between the first circuit unit 110 and the second circuit unit 120 may be patterned on the PCB panel 100.

The operation of the microwave oven according to the present invention configured as described above is similar to that described in detail through the prior art, so the detailed description thereof will be omitted here.

Looking at only the main features of the preferred embodiment according to the present invention, since the first circuit portion 110 and the second circuit portion 120 is electrically connected on the PCB panel, a plurality of wirings for electrically connecting a plurality of PCB boards in the prior art and You can delete connectors.

In addition, by arranging the wirings crossing the upper and lower spaces in the apparatus chamber 3 intricately, only essential wirings are concentrated / induced in the lower space, thereby increasing workability during production and maintenance.

In addition, by inducing the wirings to the lower space as described above, the input power supply line 17 can be exposed to the lower side of the back of the main body, thereby facilitating the management of the power supply line 17. That is, when the input power line 17 is exposed to the upper side of the back of the main body as in the prior art, there is a risk of contact with the heating portion of the back, and a separate fixing means was used to prevent this. However, according to the present invention, the power line 17 exposed to the outside through the rear lower side is not likely to come into contact with the heating unit, so that no additional fixing means is required.

As described above, according to the microwave oven according to the present invention, by assembling a plurality of PCB panels on which various circuit components are mounted into a single panel, a plurality of connectors and wirings are eliminated to improve their assemblability and reduce production costs. There is an effect made.

In addition, it is very easy to manage the wiring in the equipment room and the management of the power line exposed to the outside, and there are other effects in which safety is improved.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

Claims (2)

A microwave oven for driving a load by inputting a commercial AC power source to generate a predetermined direct current through a low voltage transformer, wherein the first circuit part is supplied with the DC power of the low voltage transformer and the second AC power supplied with the commercial AC power source. A microwave oven having an integrated PCB board, wherein the circuit unit is formed integrally with the PCB panel on the back of the operation panel. The microwave oven of claim 1, wherein the connection between the first circuit unit and the second circuit unit is patterned on the PCB panel.