KR100442934B1 - A capacitor for micro-wave oven - Google Patents

Abstract

The present invention relates to a capacitor for a microwave oven, the elliptical insulating case 30 formed with electrode insulators 22 and 23 at the tip of the fixing plate 21, and the electrode insulator of the insulating case 30 ( 22 and 23, respectively, inserted into the bottom of the electrode insulator holes 22 and 23, respectively, and the first electrode 10 having the fixing tabs 1 and 11 connected to the power supply line at the upper end thereof, respectively. ) And the second electrode 20 and the incision grooves 31 and 32 are formed on both sides thereof so that the fixing tabs 1 and 11 of the first electrode 10 and the second electrode 20 protrude. A boss 33 having a screw hole 33A at the bottom thereof is coupled to a lower portion of the fixing cover 40 and the insulating case 30 formed vertically from the bottom, and on both sides of the first electrode 10 and the second electrode. It consists of a square metal plate-shaped ground metal sphere 50 in which insertion holes 43 and 44 are formed so that the electrode insulator openings 22 and 23 including 20 may protrude.

As described above, the present invention simplifies the structure of the capacitor that dissipates the unwanted radiation wave and the noise voltage generated during the operation of the microwave, thereby increasing the productivity of the product, reducing the manufacturing cost, and enabling stable operation.

Description

Capacitor for microwave oven {A capacitor for micro-wave oven}

The present invention relates to a microwave oven, and in particular, to increase the productivity of the product by simplifying the structure of a capacitor installed on the power supply path of the microwave to eliminate unwanted radiation and noise voltage generated during the operation of the microwave oven. The present invention relates to a capacitor for a microwave oven configured to reduce cost and facilitate operation.

In general, home appliances that are operated by electricity generate electromagnetic waves during use. In particular, microwaves are irradiated with ultra-high frequency during the operation of high voltage, and unnecessary radiation waves or noise voltages are applied in addition to the frequencies required for heating food. It flows back through the power line filament and cathode terminals, causing radio interference to home appliances such as televisions and radios.

Therefore, in a microwave oven having a conventional structure, by combining a capacitor having a capacitance together with a choke coil to the cathode terminal constituting the power supply line of the filament of the magnetron, unwanted radiation and noise voltage generated during the operation of the magnetron to the outside Block delivery.

1 is an exploded perspective view of a microwave capacitor which is coupled to a cathode terminal constituting a power supply line of a magnetron and blocks unwanted radiation waves and noise waves from being transmitted to the outside. In the 200, the dielectric electrodes 110 are formed at both sides of the upper electrode, the common electrode is formed at the lower side thereof, and the through holes 111 and 112 are formed at the center of each of the separation electrodes. The first electrode connector 100 and the second electrode connector 120 which are in close contact with the upper part of the separation electrode, respectively, and fixedly coupled to the center of the first electrode connector 100 and the second electrode connector 120, the outer peripheral surface Insulation tubes 131 and 141 made of an insulator are coupled to each other, and the first electrode 130 and the second electrode 140 having the fixing tabs 132 and 142 formed thereon, and a ground metal sphere coupled to the lower portion of the dielectric 110. 150, and the ground metal sphere ( An upper insulating cylinder 160 and a lower insulating cylinder 170 coupled to the upper and lower portions of the 150 and the insulating resin material 180 filled in the upper insulating cylinder 160 and the lower insulating cylinder 170 are main components. Is done.

The microwave capacitor 200 may be formed directly under the fixed tabs 132 and 142 in a state in which fixing tabs 132 and 142 are fused to upper ends of the first electrode 130 and the second electrode 140, respectively. After fusion bonding the first electrode connector 100 and the second electrode connector 120, the first electrode connector 100 and the second electrode connector 120 are bonded to the separation electrodes of the dielectric 110, respectively. After completion of one process, the common electrode of the dielectric 110 and the ground metal sphere 150 are bonded, and then the insulating resin material between the ground metal sphere 150, the upper insulating cylinder 160 and the lower insulating cylinder 170 Production is accomplished by charging 180.

However, the conventional microwave capacitor 200 as described above is made of a large number of components, a large manufacturing cost is consumed, in particular fixed to the front and outer peripheral surfaces of the first electrode 130 and the second electrode 140. Since the tabs 132 and 142, the first electrode connecting device 100 and the second electrode connecting device 120 are fused to each other, they need to be joined to the separating electrode of the dielectric 110, and thus a lot of manpower is required. In the charging process of 180, a lot of working time is required, and thus workability is degraded.

The present invention is to solve the above-mentioned problems, the technical problem of the present invention is installed on the power supply path of the microwave oven to eliminate the unwanted radiation and noise voltage generated during the operation of the microwave capacitor By simplifying the structure, product productivity is increased, manufacturing cost is reduced, and operation is smooth, thereby providing a reliable capacitor.

Technical problem of the present invention as described above, the inner side of both sides of the inner wall to form a fixed plate, each of the elliptical insulation case formed by vertically forming a cylindrical electrode insulator protruding downward on both sides of the front end of the fixing plate A first electrode and a second electrode respectively inserted into the electrode insulator of the insulating case and protruding to the lower portion of the electrode insulator, and having a fixing tab connected to a power supply line at an upper end thereof, respectively; It is coupled to the fixing plate of the upper side, the inner side of the fixing tab of each of the fixing tab of the first electrode and the second electrode protruding, each of the fixing cover formed a boss having a screw hole in the lower portion; And a through hole coupled to a lower portion of the insulating case and formed at the center of a protrusion formed on the upper portion of the insulating case so as to be in close contact with a lower portion of the inner wall of the insulating case, to coincide with the screw hole of the fixing cover. It is achieved by providing a capacitor for a microwave oven, characterized in that consisting of a rectangular metal plate-shaped ground metal sphere each formed so that the electrode insulating sphere including an insertion hole.

Hereinafter, the microwave capacitor according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view of a capacitor for a microwave oven having a conventional structure;

2 is an exploded perspective view of a microwave capacitor according to an embodiment of the present invention;

3 is a cross-sectional view of the present invention shown in FIG.

4 is a cross-sectional view showing another embodiment of the present invention;

5 is a schematic diagram illustrating a combined state of the present invention.

<Explanation of symbols for main parts of drawing>

1,11: fixed tab 10: first electrode

20: second electrode 21: fixed plate

22,23: electrode insulation port 30: insulation case

31,32: Incision groove 33: Boss

33A: screw hole 40: fixing cover

41: protrusion 42: through hole

50 grounding metal sphere 70 high frequency absorber

Figure 2 is an exploded perspective view of a microwave capacitor according to an embodiment of the present invention, Figure 3 is a cross-sectional view of the present invention shown in Figure 2, the present invention provides a coupling space of the internal components, each of the components An elliptical insulating case 30 to prevent a short circuit, the first electrode 10 and the second electrode 20 directly connected to the power supply line, and the first electrode is coupled to the inside of the insulating case 30 10 and the fixing cover 40 for fixing the second electrode 20 and the ground metal ball 50.

Here, the insulating case 30 that provides a coupling space between the first electrode 10 and the second electrode 20 and the fixing cover 40 has a fixing plate 21 formed horizontally from both sides of the inner wall, and the fixing plate 21 described above. At the distal end of the), the electrode insulators 22 and 23 having a cylindrical shape are formed vertically so that the first electrode 10 and the second electrode 20 are inserted.

At this time, the insulating case 30 is made of an insulating material such as a resin material so that the conductors such as the first electrode 10 and the second electrode 20 coupled therein can maintain an insulating state. In the embodiment, the microwave capacitor 100 according to the present invention has a high strength, such as PBT resin (Polybutyleneterephthalate) in consideration of the coupling to the heat generating parts, such as a magnetron is composed of a heat-resistant resin that can withstand high heat .

Subsequently, the first electrode 10 and the second electrode which are coupled to the external power supply line through the fixing tabs 1 and 11 formed on the upper side of the electrode insulation holes 22 and 23 of the insulating case 30. As the electrodes 20 are coupled to each other, the first electrode 10 and the second electrode 20 are fixed by the fixing cover 40. At this time, the first electrode 10 and the second electrode are fixed. The tip of () is projected to the outside through the lower end of the electrode insulator (22, 23) for electrical connection with the outside.

As described above, the fixing cover 40 coupled to the inside of the insulating case 30 to fix the first electrode 10 and the second electrode 20 is the first electrode 10 and the second electrode. Rectangle grooves 31 and 32 having a rectangular shape are formed so that the fixing tabs 1 and 11 of the electrode 20 are protruded, and a boss 33 having a screw hole 33A is vertically formed in the lower portion thereof. .

On the other hand, the fixing cover 40 forms an elastic piece 35 having locking hooks 35A on both lower sides thereof, and the locking hooks 35A are held on one side of the fixing plate 21 of the insulating case 30. Insulating the fixing cover 40 by the action of the hook hook 35A and the locking hole in the process of pressing the fixing cover 40 in the downward direction from the upper portion of the insulating case 30 by forming the locking hole of the rectangular hole shape The case 30 is fixed.

Subsequently, the rectangular metal plate-shaped ground metal sphere 50 coupled to the lower portion of the insulating case 30 has an elliptical protrusion 41 formed at an upper portion thereof to be in close contact with the inner circumference of the insulating case 30. The through hole 42 is formed in the center of the protrusion part 41 so as to coincide with the screw 33A hole of the fixing cover 40.

In addition, the electrode insulator 22 may be formed at both sides of the through hole 42 such that the electrode insulators 22 and 23 including the first electrode 10 and the second electrode 20 may protrude downward. The insertion holes 43 and 44 of larger diameter than 23 are formed, respectively.

The ground metal sphere 50 is a protrusion 41 is in close contact with the inner circumferential surface of the insulating case 30 in the bonding process with the insulating case 30, while fixing the screw inserted through the through hole 42 ( By fastening to the screw hole 33A of 40), it has a state of being fixed by the strong bonding force with the ground metal sphere 50 even without a separate additional process such as a resin filling process.

The present invention coupled as described above, the insertion hole of the first electrode 10 and the second electrode 20 and the ground metal sphere 50 coupled to the electrode insulator (22, 23) of the insulating case 30 (43, 44) It has a capacitance between the ground potential electrodes formed in the burring hole of the periphery.

4 is a view showing another embodiment of the present invention, such a capacitor for a microwave oven 80 is an electrode inside the insulating case 30 to which the first electrode 10 and the second electrode 20 are coupled. By combining the high-frequency absorber 70 having the through-holes on both sides such that the insulating spheres 22 and 23 are inserted, the high-frequency generated in the operation of the magnetron 300 is absorbed.

The high frequency absorber 70 is formed by forming a ferromagnetic powder together with an organic insulator and formed in the insertion holes 43 and 44 of the first electrode 10, the second electrode 20, and the ground metal sphere 50. By absorbing the capacitance and the high frequency primarily attenuated by the choke coil 260 installed inside the shield case 250 of the magnetron 300, the external leakage of the high frequency is more effectively blocked.

The operation and effects of the present invention described above will be described below.

Microwave capacitor 100 according to the present invention is coupled to one side of the magnetron for irradiating ultra-high frequency in the operation process of the microwave oven in addition to the frequency required for heating food, such as unnecessary radiation waves or noise voltage power line and the cathode terminal To prevent backflow.

On the other hand, if you want to combine the present invention, first, the first electrode 10 and the second electrode 20 is inserted into the inside of the electrode insulator (22, 23) of the insulating case 30, respectively, The fixing cover 40 is coupled through the upper portion of the insulating case 30.

At this time, the front and rear surfaces of the fixing cover 40 is formed with an elastic piece 35 having a locking hook 35A at the tip, and on one side of the fixing plate 21 formed horizontally from the inner wall of the insulating case 30. By forming a rectangular locking hole in which the locking hook 35A is engaged, the fixing cover 40 is operated by the action of the locking hook 35A and the locking hole in the process of inserting the fixing cover 40 into the insulating case 30. 40) and the insulating case 30 to be fixed.

As described above, when the fixing cover 40 is inserted through the upper portion of the insulating case 30 to fix the first electrode 10 and the second electrode 20, the lower portion of the insulating case 30 is completed. The ground metal sphere 50 is in close contact with the through.

When the ground metal sphere 50 is brought into close contact with the lower portion of the insulating case 30 as described above, the protrusion 41 formed on the upper portion of the ground metal sphere 50 is inserted into the inner wall surface of the insulating case 30 to insulate the insulating case 30. ) And the ground metal sphere 50 are fixed without flow, and after completion of the above process, the screw inserted through the through hole 42 of the ground metal sphere 50 is attached to the boss 33 of the fixing cover 40. By fastening with the formed screw hole 33A to complete the coupling of the insulating case 30 and the ground metal ball (50).

The present invention, the assembly is completed according to the above process, the screw through the coupling hole 45 formed in each corner of the ground metal plate 50 in close contact with one side of the shield case 250 of the magnetron 300 as shown in FIG. Is coupled to the magnetron 300 by the fastening, and after completion of the process, the fixing tabs 1 and 11 of the first electrode 10 and the second electrode 20 protrude through the insulating case 30. While connecting the power supply line, the installation is completed by coupling the choke coil 260 between the first electrode 10 and the second electrode 20 and the cathode of the magnetron 300.

The present invention coupled as described above, the insertion hole 43 of the first electrode 10 and the second electrode 20 and the ground metal sphere 50 coupled to the electrode insulating spheres 22 and 23 of the insulating case 30. A magnetron has a capacitance between the ground potential electrodes formed at the bearing hole of 44 and a harmonic filter (LC filter) is formed together with the choke coil 260 installed inside the shield case 250 of the magnetron 300. Blocking unnecessary high frequency generated in the operation process of 300 to the outside.

As described above, the microwave capacitor 100 according to the present invention is produced by simplifying the structure of a capacitor installed on a power supply path of a microwave oven to dissipate unnecessary radiation and noise voltage generated during the operation of the microwave oven. While reducing costs, the productivity of the product can be increased.

In particular, the present invention is the boundary surface between a plurality of materials by the electrode insulating spheres 22, 23 for maintaining the creepage distance between the first electrode 10 and the second electrode 20 and the ground metal sphere 50 is formed of a single resin Abnormal phenomena, such as weakening of the breakdown voltage due to cracks, are suppressed and stable operation is possible, thus effectively eliminating unwanted radiation waves and noise voltage generated during the operation of the microwave oven.

The present invention has been shown and described with respect to specific preferred embodiments, but the present invention is not limited to the above-described embodiments, and the present invention is not limited to the above-described embodiments without departing from the gist of the invention as claimed in the claims. Anyone with knowledge will be able to make various variations.

Claims (2)

Both sides of the inner wall are protruded horizontally to form the fixing plates 21, and both ends of the fixing plate 21 are formed in an elliptical insulating case having cylindrical electrode insulators 22 and 23 vertically protruding downward. 30; Inserted into the electrode insulator (22, 23) of the insulating case 30, respectively, protrudes to the lower portion of the electrode insulator (22, 23), the upper end of the fixing tab (1, which is connected to the power supply line) A first electrode 10 and a second electrode 20 having 11 attached thereto; It is coupled to the upper side of the fixing plate 21 of the insulating case 30, the cutting groove (31, 32) so that the fixing tabs (1, 11) of the first electrode 10 and the second electrode 20 protrudes on both sides therein Fixing cover 40 each having a boss hole 33A having a screw hole 33A formed thereon; And It is coupled to the lower portion of the insulating case 30, the center of the protrusion 41 formed in the upper portion in close contact with the lower inner wall surface of the insulating case 30 penetrates to match the screw hole (33A) of the fixing cover 40 Square plate body formed with holes 42 and insertion holes 43 and 44 respectively formed to protrude electrode insulating holes 22 and 23 including the first electrode 10 and the second electrode 20 on both sides thereof. Capacitor for a microwave oven, characterized in that consisting of a ground metal sphere (50). The method of claim 1, wherein the insulating case 30, the ferromagnetic powder is molded together with the organic insulator, the electrode insulator (22, 23) including the first electrode 10 and the second electrode 20 is formed inside Microwave capacitors characterized in that the high-frequency absorber (70) having a through hole formed so as to be inserted into each other is coupled to the lower portion of the fixed plate (21).