JPH0226237Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] This invention relates to a high-pressure rectifier, and particularly to a high-pressure rectifier used in a high-pressure circuit of a high-frequency cooking device.

[Technical background of the invention]

A high voltage circuit of a high frequency cooking device such as a so-called microwave oven is shown in FIG. 3, for example.

In the high voltage circuit of this type of microwave oven, one terminal of the secondary coil 31 of the high voltage transformer 30 is connected to the heater side of the magnetron 34 via the high voltage capacitor 33, and the other terminal is connected to the plate side. Further, the secondary heater coil 32 of the transformer 30 is connected to the fuse 3
5 to the heater of the magnetron 34. One terminal of the heater of the magnetron 34 is connected to ground via a fuse 35 and a rectifier 36.

The fuse 35 used here is to prevent the high-voltage transformer 30 from igniting due to melting, and as shown in FIG. A faston receptacle 42 was fixed, and a connector 43 was fixed to the other end to connect a lead wire 44 to the high voltage transformer 30.

Further, as shown in FIG. 5, the rectifier 36 has an anode side lead 51 drawn out from the main body block 50.
A faston receptacle 52 is provided at one end, and a round grounding terminal is provided at one end of a cathode lead 53.

With such a high voltage circuit, it is difficult to simultaneously caulk the silver fuse wire 41 and the reinforcing paper core 40 when assembling the heater coil, and there is a risk of damaging the fuse when assembling the microwave oven.

Furthermore, if the rectifier 36 is short-circuited due to a failure or the like, the secondary side of the high-voltage transformer 30 will definitely become short-circuited. For this reason, when repairing, it is necessary to replace the rectifier as well as the high voltage transformer, making the repair expensive.

[Purpose of invention]

This invention was made in an attempt to eliminate the above-mentioned drawbacks of the prior art, and aims to provide a high-voltage rectifier that is easy to assemble as a microwave oven and can be easily repaired.

[Summary of the idea]

To achieve this purpose, according to this invention,
Incorporate the fuse of the high voltage transformer into the high voltage rectifier.

[Example of idea]

Embodiments of this invention will be described below with reference to the accompanying drawings. Note that the same reference numerals in each figure indicate similar objects.

FIG. 1 is a block diagram a and a circuit diagram b showing an embodiment of this invention.

The rectifier 36 consists of a block 10 having a substantially trapezoidal shape in plan, and an anode lead 11 and a cathode lead 12 connected to the rectifier chip are respectively drawn out in opposite directions of the block 10.

A silver fuse 16 is fixed to one end of the anode lead by a connector 13. This connector 13 receives a lead 14 connected to a secondary heater winding of a high voltage transformer. cathode lead 12
A round earth terminal 15 is fixed to one end of the terminal.

Furthermore, a slit 10a is formed on one surface of the epoxy resin mold of the rectifier block 10 from one side to the other. On the surface of the block 10 from which the cathode lead 12 is drawn out, below the slit 10a is a vinyl electric wire 1 that is not electrically connected.
7 is molded. A faston receptacle 18 is fixed to the tip of this electric wire 17.

The silver fuse 16 fixed to the connector 13 is
After winding the anode lead 11 several times, the slit 1
The wire is guided through the inside of the wire 0a, wound around the vinyl electric wire 17, and then fixed to the receptacle 18. slit 10
The silver fuse 16 inserted in a is molded with resin.

The entire high voltage rectifier 36 including the fuse 16 for the heater coil is covered with a heat shrink tube 19.

Such a rectifier 1 is connected in a high voltage circuit as shown in FIG.

That is, the secondary winding 31 of the high voltage transformer 30
One end of the capacitor 33 is connected to the high voltage capacitor 33, and the other end of the capacitor 33 is inserted and connected to the faston receptacle 18 of the rectifier 36. This receptacle 18
is simultaneously connected to one of the heater terminals of the magnetron 34. The other end of the secondary winding 31 is directly connected to the other heater terminal of the magnetron 34. The terminal 15 of the cathode lead 12 of the rectifier 36 is screwed to the yoke portion of the magnetron 34.

[Effect of idea]

According to this invention, by configuring as described above, it is possible to provide a high voltage rectifier that exhibits the following effects.

(1) Since the fuse is integrated into the high-voltage rectifier, the number of work steps when assembling the microwave oven can be reduced.

(2) No reinforcing paper is used to manufacture the fuse, and there is no need to caulk the reinforcing paper, making the manufacturing process extremely simple.

(3) Since the fuse and rectifier are integrated, component costs can be reduced.

(4) Since the high-voltage rectifier can be directly cooled by a fan motor, etc., the rectifier can be made smaller and smaller in capacity.

(5) The fuse and rectifier can be replaced with one part, improving serviceability.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of an embodiment of this invention, Fig. 2 is a connection diagram of a high voltage circuit according to this invention, Fig. 3 is a general circuit diagram of a high voltage circuit, and Figs. 4 and 5 are diagrams of conventional parts. FIG. 10... Rectifier block, 10a... Slit, 11... Anode lead, 12... Cathode lead, 13... Connector, 16... Silver fuse, 17... Vinyl electric wire, 18... Faston receptacle.

Claims (1)

[Claims for Utility Model Registration] 1. A high voltage rectifier in which an anode lead and a cathode lead are drawn out from a molded block, comprising: a slit formed on the surface of the block from the anode lead lead-out side to the cathode lead lead-out side; A connector for connecting a lead wire that is not electrically connected, with one end molded on the part near the extraction side of the cathode lead and a faston receptacle on the other end, and a heater coil of a high voltage transformer at one end of the anode lead. A high-voltage rectifier comprising: a fuse wire having one end fixed and the other end fixed to the Faston receptacle passing through the slit. 2. Utility Model Registration The rectifier according to claim 1, wherein the fuse wire is molded in the slit portion. 3. Utility Model Registration A high-voltage rectifier according to claim 1 or 2, characterized in that the exposed portions of the mold block and the fuse wire are covered with a heat shrink tube.