JPS60170187A - High frequency heater - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to connections inside the body of a high-frequency heating device such as a microwave oven, particularly to a connection structure for high-voltage electric wires.

Conventional Structure and Points of Interest In conventional high-frequency heating devices of this type, there was a risk that the high-voltage side electric wire and the low-voltage side electric wire would come into contact with each other in the wiring inside the fuselage.

In other words, the high-voltage wiring area between the secondary side of the high-voltage transformer, magnetron, high-voltage capacitor, and diode, and the low-voltage wiring area between the primary side of the high-voltage transformer, low-voltage parts such as the fan motor, timer motor, and door switch are close to each other or intersect with each other. This makes it easy for high-voltage wires and low-voltage wires to come into contact with each other. When high-voltage and low-voltage wires are close to each other or in contact with each other,
Due to factors such as scratches and deterioration due to heat, insulation breakdown can occur between high-voltage and low-voltage wires. If insulation breakdown occurs, high voltage will be applied to the aircraft through the low-voltage wires, destroying parts and posing a danger to humans.

Furthermore, in the past, the high-voltage side connections were often concentrated in the lower part of the fuselage interior, which significantly worsened assembly work efficiency and serviceability when replacing parts.

Hereinafter, a conventional high frequency heating device as described above will be explained with reference to the drawings. FIG. 1 shows a side sectional view of a conventional high frequency heating device. In FIG. 1, 1 is a heating chamber in which food is placed and cooked, 2 is a magnetron that oscillates high frequency waves, and 3 is a waveguide that guides the high frequency waves oscillated by the magnetron 2 to the heating chamber 1 for heating. It is installed on the top of chamber 1. 4 is a high-voltage transformer that supplies high voltage to the magnetron 2, and 5 is a high-voltage capacitor, which is installed at the bottom of the main body. 6 is a high voltage diode located near the high voltage capacitor. 7 is a cooling fan motor installed on the back plate of the main body, 8 is a door switch installed on the front plate of the main body, 9 is a timer motor installed on the front plate of the main body, and 10 is the magnetron 2, the high voltage transformer 4, and the above. A high voltage line 11 connects the high voltage capacitor 5 and the high voltage diode 6, and a low voltage line 11 connects the high voltage transformer 4, the fan motor 7, the door switch 8, and the timer motor 9.

The configuration of the high-frequency heating device configured as described above will be explained below.

In this configuration, the high voltage capacitor 5 and high voltage diode 6 are installed at the bottom of the main body, so the magnetron 2
・The high-voltage wire 10 that connects the high-voltage transformer 4, high-voltage capacitor 5, and high-voltage diode 6 is concentrated in the front part at the bottom of the fuselage, and parts such as the high-voltage transformer 4, door switch 8, timer motor 9, etc. Low voltage line 1 connecting
1 is also concentrated in the front part of the aircraft, so high voltage line 10 and low voltage line 1
1 is mixed. The door switch 8 and timer motor 9 must be installed at the front of the aircraft for their operational purposes, and the high-voltage condenser 5 and high-voltage diode 6 as well as the high-voltage transformer 4 must be placed as close as possible to the cooling fan motor 7 and must be installed at the rear of the aircraft. It is installed at the front of the aircraft due to the lack of space. Therefore, if the high-voltage condenser 5 is installed in the lower part of the machine body, the connection area of the high-voltage line 10 and the connection area of the low-voltage line 11 will intersect. When the high-voltage line 10 and low-voltage line 11 are close to each other or in contact with each other, when the withstand voltage of the high-voltage line 10 becomes low due to heat-induced deterioration or flaws, insulation is established between the high-voltage line 10 and the low-voltage line 11. Destruction occurs, resulting in the destruction of parts and the aircraft itself being exposed to high voltage, which is extremely dangerous to the user.

In addition, high-voltage and low-voltage connections are concentrated in the front of the aircraft, making assembly work very inefficient, and serviceability when replacing parts is also poor.

In order to ensure safety with this configuration, it is necessary to maintain an appropriate distance between the high-voltage connection area and the low-voltage connection area, which requires wiring fixing parts such as lead sensor holders, which increases costs. There is also the problem that the aircraft cannot be made smaller because it requires spacing.

Purpose of the Invention In view of the above-mentioned problems, the present invention provides a compact and inexpensive high-frequency heating device that is highly safe in that high-voltage connections and low-voltage connections do not come close to each other or come into contact with each other, and has excellent assembly workability and serviceability. It is.

Structure of the Invention In order to achieve this object, the high frequency heating device of the present invention has a heating chamber for cooking food, a magnetron installed on the side of the heating chamber to oscillate high frequency waves, and a main body bottom plate for applying a high voltage to the magnetron. A high voltage transformer installed in
a high-voltage capacitor installed diagonally on the top surface of the heating chamber with its terminal facing downward; a high-voltage diode installed near the high-voltage capacitor; the magnetron; the high-voltage transformer; the high-voltage capacitor; and the high-voltage diode. It consists of high-voltage wires connecting the

With this configuration, it is possible to separate the high-voltage line wiring area and the low-voltage line wiring area, resulting in a high-frequency heating device with excellent safety. Additionally, by installing the high-voltage condenser on the top of the heating chamber top plate, wiring work becomes easier and work efficiency and serviceability are improved.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 shows a side cross-sectional view of a high-frequency heating device according to an embodiment of the present invention. In Figure 2, 1
2 is a heating chamber in which food is placed and cooked; 2 is a magnetron installed on the side of the heating chamber 1 with the heater terminal facing upward; and 3 is a magnetron that oscillates high frequency waves; 3 is a magnetron that sends high frequency waves oscillated by the magnetron 2 to the heating chamber 2; A waveguide is installed to supply from the side, 4 is a high-voltage capacitor installed on the bottom plate of the main body and supplies high voltage to the magnetron 2, and 5 is a terminal on the upper surface of the top plate of the heating chamber 1, with its terminal facing downward. 6 is a high-voltage diode installed next to the high-voltage condenser 5, 7 is a cooling fan motor installed on the back plate of the main unit, and 8 is a door switch installed on the front plate of the main unit. , 9 is a timer motor installed on the front plate of the main body, 10 is the magnetron 2, the high voltage transformer 4, the high voltage capacitor 5, and the high voltage diode 6.
A high-voltage line 11 connects the high-voltage transformer 4, the fan motor 7, the Tourne'4r 8, and the timer motor 9.

The high frequency heating device configured as above will be explained below. In this embodiment, a high-voltage condenser 5 and a high-voltage diode 6 are installed on the upper surface of the top plate of the heating chamber 1.

Therefore, the wiring between the magnetron 2, high-voltage transformer 4, high-voltage capacitor 5, and high-voltage diode 6 is concentrated at the rear of the fuselage, and wiring work for the high-voltage capacitor 5, which is difficult, is done in the upper part of the fuselage where the work is easier. It will be held in On the other hand, the wiring of the low voltage line 11 passes through the bottom of the main body and wraps around the front part to connect the high voltage lance 4, the door switch 8, and the timer motor 9. Wiring for the fan motor 7 is done at the rear of the body, but it is routed along the back plate of the body, so it does not come into contact with or come close to the high voltage line 10.

In this way, the wiring area of the high-voltage line 10 and the wiring area of the low-voltage line 11 are completely separated, and there is no risk of dielectric breakdown occurring between the high-voltage line 10 and the low-voltage line 11. ing.

- Also, by installing the high-voltage capacitor 5 and high-voltage diode 6 on the top surface of the heating chamber 1, the structure allows high-voltage wiring to be carried out very easily. Among high-voltage wiring, the wiring of the high-voltage capacitor 5 is particularly complicated and easy to make mistakes, but since the high-voltage capacitor 5 is located at the top of the machine, workers can clearly see the work they are doing, and there is still work to be done. It is easy to use, so you can do the work without any mistakes.

Furthermore, the high-voltage wiring area and low-voltage wiring area are separated, and there is no need to take a distance between the high-voltage line 10 and the low-voltage line 11, so the depth dimension of the device (dimension from the front of the door to the back plate of the main unit)
can be reduced. Furthermore, since the high-voltage capacitor 5 is installed tilted so that the terminals are facing downward, it is possible to reduce the height of the device while maintaining a sufficient insulation distance from the main body outer box. Tilting the high-voltage capacitor 5 is absolutely necessary as it has the effect of preventing dew droplets from accumulating on the terminals.

As described above, according to this embodiment, the high voltage wiring area and the low voltage wiring area can be completely separated, resulting in a highly safe device.

In addition, since the high-voltage capacitor 5 is installed tilted on the top surface of the heating chamber 1 with the terminals facing down, the wiring work is easier.
The device is easy to replace and service, and the depth and height of the device can be reduced, making it possible to make the device smaller and lighter.

Effects of the Invention As described above, the present invention has a structure in which high-voltage capacitors are installed on two sides of the top plate of the heating chamber at an angle with the terminals facing down, so that the high-voltage wiring area and the low-voltage wiring area are completely separated. This makes it possible to create a highly safe device in which no dielectric breakdown occurs between the high-voltage line and the low-voltage line. Furthermore, since the high-voltage capacitor is located at the top of the machine, wiring work and parts replacement serviceability is easy.Furthermore, the high-voltage capacitor is tilted and there is no need to consider the insulation distance between the high-voltage line and the low-voltage line. It is possible to provide a compact and lightweight high-frequency heating device with a small depth and height, and its practical effects are significant.

[Brief explanation of drawings]

FIG. 1 is a side sectional view of a conventional high frequency heating device, and FIG. 2 is a side sectional view of a high frequency heating device which is an embodiment of the present invention. 1... Heating chamber, 2... Magnetron,
4... High voltage transformer, 5... High voltage capacitor, 6... High voltage diode, 10...
...High voltage line, 11...Low voltage line. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
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Claims (1)

[Claims] A heating chamber for cooking food; a high-frequency oscillator installed on the side of the heating chamber to oscillate high-frequency waves; a high-voltage transformer for applying high voltage to the high-frequency oscillator and installed on the bottom plate of the main body; and a top plate of the heating chamber. A high voltage capacitor is installed diagonally on the top surface with the terminal facing down, and a high voltage diode is installed near the high voltage capacitor, and the island M&
A high-frequency heating device configured to separate a high-voltage line wiring area connecting the high-voltage transformer, the high-voltage capacitor, and the high-voltage diode from the low-voltage line wiring area to which no high voltage is applied.