CN216353797U - High-voltage capacitor for microwave oven - Google Patents

Abstract

The utility model relates to a high-voltage capacitor for a microwave oven, and belongs to the technical field of capacitors. This high-voltage capacitor includes the shell and sets up the condenser core inside the shell, it has insulating oil to fill in the cavity between shell and the condenser core, the both sides embedding sealed mounting at the top of shell has joint Assembly, the adaptation is pegged graft and is had plug assembly in the joint Assembly, this joint Assembly sets hollow structure to upper and lower joint, set up the rupture membrane in upper and lower joint, when the inside overheated of shell, the rupture membrane is broken in pressure increase, utilize the air current to ejecting with plug assembly, to whole electric capacity outage, prevent that electric capacity from continuously generating heat and burning out or even explosion, place the condenser core in the shell, and soak with insulating oil, still set up the fin on the shell, effectively dispel the heat to electric capacity, use under the high-pressure operating mode.

Description

High-voltage capacitor for microwave oven

Technical Field

The utility model belongs to the technical field of capacitors, and particularly relates to a high-voltage capacitor for a microwave oven.

Background

The capacitor of the microwave oven is used in a microwave oven powered by a 50Hz/60Hz power supply, is connected with a main power circuit of a magnetron and is used for stabilizing the non-self-healing performance of the current of the magnetron, the rated voltage of the capacitor is generally between 2kV and 3kV and is obviously higher than other similar elements, the capacitor can easily generate heat when working under high voltage, when the voltage is abnormally increased or the capacitor core is abnormal, a large amount of heat is generated, the capacitor core is melted and even exploded, and the internal electrolyte flows out to damage an electric appliance.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems mentioned in the background technology, the utility model provides a high-voltage capacitor for a microwave oven.

The purpose of the utility model can be realized by the following technical scheme:

a high-voltage capacitor for a microwave oven comprises a shell and a capacitor core arranged in the shell, wherein insulating oil is filled in a cavity between the shell and the capacitor core, the capacitor core is separated from the shell through the insulating oil to prevent breakdown and electric leakage, meanwhile, the insulating oil can also be used for cooling the capacitor core, joint components are embedded and hermetically installed on two sides of the top of the shell, and plug components are inserted in the joint components in a matching and inserting mode;

the connector assembly comprises an upper connector and a lower connector, a threaded hole is formed in the bottom of the upper connector, a threaded column is arranged at the top of the lower connector, the upper connector and the lower connector are connected through a threaded hole and a threaded column in a matched threaded manner, a clamping groove is formed in the top of the upper connector and communicated with the threaded hole, a wiring terminal is arranged at the bottom of the lower connector, the wiring terminal is electrically connected with an electrode of a capacitor core through a wire, a through hole is formed in the middle of the lower connector, the inside of the shell is communicated with the outside, an explosion-proof membrane is arranged at the top end of the threaded column of the lower connector, the inside of the shell is isolated from the outside, when the temperature of the capacitor core is too high, the pressure inside of the shell is increased, the explosion-proof membrane is pressed and is expanded, the air flow inside of the shell is released to the inside of the upper connector instantly, the plug assembly is ejected out, the electrical connection is disconnected, and the situation that the capacitor explosion is caused by continuous work and the temperature rise is prevented.

The plug assembly comprises a wiring terminal, the top of the wiring terminal is connected with a conducting wire, the bottom of the wiring terminal is provided with a puncture needle, when the explosion-proof membrane deforms to a certain degree under pressure, the puncture needle punctures the explosion-proof membrane, abnormal overheating time of a capacitor core is controlled, and damage to the capacitor caused by long-time overheating is prevented.

Further, be provided with the snap ring on the week lateral wall of terminal, the terminal passes through snap ring and joint groove interference fit joint for the terminal has certain joint strength with the top connection, prevents that the terminal pine from taking off.

Further, the peripheral side wall of the upper side of the terminal and the peripheral side walls of the upper and lower connectors are coated with insulating coatings.

Furthermore, the outer side wall of the shell is provided with radiating fins, so that heat generated when the capacitor core normally works can be timely dissipated, and abnormity caused by heat accumulation can be prevented.

Further, the filling depth of the insulating oil is at least 5mm below the top wall of the shell, so that the insulating oil is prevented from overflowing.

The utility model has the beneficial effects that:

1. the utility model sets a connector component on the wiring end, sets the upper connector and the lower connector into a hollow structure, sets an explosion-proof film in the upper connector and the lower connector, when the inner part of the shell is overheated, the pressure is increased to expand the explosion-proof film, the plug component is ejected by using air flow to cut off the power of the whole capacitor, and the capacitor is prevented from being continuously heated and burned out and even exploded.

2. The capacitor core is arranged in the shell and soaked in the insulating oil, and the radiating fins are arranged on the shell, so that the capacitor core can effectively radiate the capacitor and is suitable for being used under a high-voltage working condition.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view showing an external structure of a high voltage capacitor for a microwave oven according to the present invention;

FIG. 2 is a schematic view showing an internal structure of a high voltage capacitor for a microwave oven according to the present invention;

FIG. 3 is a schematic structural view of the joint assembly of the present invention;

fig. 4 is a schematic view of the mounting structure of the header assembly and the plug assembly of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

11. a heat sink; 12. a plug assembly; 21. a housing; 22. a joint assembly; 23. insulating oil; 24. a capacitor core; 31. a lower joint; 32. an explosion-proof membrane; 33. an upper joint; 34. a clamping groove; 35. a threaded post; 36. a wiring terminal; 41. a binding post; 42. puncturing needle; 43. and a through hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, a high voltage capacitor for a microwave oven includes a housing 21 and a capacitor core 24 disposed inside the housing 21, wherein a cavity between the housing 21 and the capacitor core 24 is filled with insulating oil 23, the capacitor core 24 is separated from the housing 21 by the insulating oil 23 to prevent breakdown and leakage, and the insulating oil 23 can also cool the capacitor core 24, connector assemblies 22 are embedded and hermetically mounted at two sides of the top of the housing 21, and plug assemblies 12 are inserted into the connector assemblies 22;

the connector assembly 22 comprises an upper connector 33 and a lower connector 31, a threaded hole is formed in the bottom of the upper connector 33, a threaded post 35 is arranged on the top of the lower connector 31, the upper connector 33 and the lower connector 31 are in adaptive threaded connection with the threaded post 35 through the threaded hole, a clamping groove 34 is formed in the top of the upper connector 33, the clamping groove 34 is communicated with the threaded hole, a wiring terminal 36 is arranged on the bottom of the lower connector 31, the wiring terminal 36 is electrically connected with an electrode of the capacitor core 24 through a conducting wire, a through hole 43 is formed in the middle of the lower connector 31, the interior of the shell 21 is communicated with the outside, an anti-explosion membrane 32 is arranged at the top end of the threaded post 35 of the lower connector 31, the interior of the shell 21 is isolated from the outside, when the temperature of the capacitor core 24 is too high, the pressure in the shell 21 is increased, the anti-explosion membrane 32 is pressed and broken, air flow in the shell 21 is instantaneously released into the upper connector 33, and the plug assembly 12 is ejected out, the electric connection is disconnected, and the capacitor explosion caused by continuous work and temperature rise is prevented.

The plug assembly 12 comprises a wiring terminal 41, a conducting wire is connected to the top of the wiring terminal 41, a puncture needle 42 is arranged at the bottom of the wiring terminal 41, and when the explosion-proof membrane 32 is deformed to a certain degree under pressure, the puncture needle 42 punctures the explosion-proof membrane 32, so that the abnormal overheating time of the capacitor core 24 is controlled, and the capacitor damage caused by long-time overheating is prevented.

Be provided with the snap ring on terminal 41's the week lateral wall, terminal 41 passes through the snap ring and the interference fit joint in joint groove 34 for terminal 41 has certain joint strength with top connection 33, prevents that terminal 41 from taking off.

The peripheral side walls of the upper side of the post 41 and the peripheral side walls of the upper and lower tabs 33 and 31 are coated with an insulating coating.

The outer side wall of the shell 21 is provided with a radiating fin 11, so that heat generated when the capacitor core 24 works normally can be timely radiated, and abnormity caused by heat accumulation can be prevented.

The filling depth of the insulating oil 23 is 5mm below the top wall of the shell 21, so that the insulating oil 23 is prevented from overflowing.

The working principle is as follows:

the wiring terminal 41 of the plug assembly 12 is clamped in the clamping groove 34 through a clamping ring, the upper connector 33 is in threaded connection with the lower connector 31, the wiring terminal 36 of the lower connector 31 is connected with the capacitor core 24 through a conducting wire, the wiring terminal 41 is electrically connected with an external circuit, namely, the capacitor can be electrified, when the capacitor core 24 works normally, the generated heat is slowly released, the insulating oil 23 firstly cools the capacitor core 24, the radiating fin 11 exchanges heat with the external environment, the insulating oil 23 is cooled, the normal operation of the capacitor is maintained, when the capacitor core 24 is abnormal or the voltage and current of the external circuit are abnormally increased, the capacitor core 24 releases a large amount of heat, the internal pressure of the shell 21 is increased, the explosion-proof membrane 32 is pressed and deformed, the strength of the explosion-proof membrane 32 is far lower than that of the shell 21, when the explosion-proof membrane 32 is broken or the excessive deformation is punctured, the internal high-pressure gas is instantly introduced into the upper connector 33, the clamped binding post 41 is ejected out, the capacitor core 24 is powered off, and the capacitor core 24 is prevented from continuously heating to cause explosion.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is merely exemplary and illustrative of the present invention, and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the utility model as defined in the accompanying claims.

Claims (8)

1. A high-voltage capacitor for a microwave oven comprises a shell (21) and a capacitor core (24) arranged in the shell (21), and is characterized in that insulating oil (23) is filled in a cavity between the shell (21) and the capacitor core (24), joint components (22) are embedded into two sides of the top of the shell (21) in a sealing mode, and plug components (12) are inserted into the joint components (22) in a matching mode;

the connector assembly (22) comprises an upper connector (33) and a lower connector (31), a threaded hole is formed in the bottom of the upper connector (33), a threaded column (35) is arranged at the top of the lower connector (31), the upper connector (33) and the lower connector (31) are connected in a threaded mode through the threaded hole and the threaded column (35) in a matched mode, and an explosion-proof membrane (32) is arranged at the top end of the threaded column (35).

2. The high voltage capacitor for the microwave oven as claimed in claim 1, wherein the top of the upper contact (33) is formed with a catching groove (34), and the middle of the lower contact (31) is formed with a through hole (43).

3. The high voltage capacitor for microwave oven as claimed in claim 1, wherein the lower terminal (31) is provided at the bottom thereof with a terminal (36), and the terminal (36) is electrically connected to the electrode of the capacitor core (24) by a wire.

4. The high voltage capacitor for the microwave oven as claimed in claim 1, wherein the plug assembly (12) comprises a terminal post (41), a wire is connected to a top of the terminal post (41), and a piercing needle (42) is provided to a bottom of the terminal post (41).

5. The high voltage capacitor for the microwave oven as claimed in claim 4, wherein a snap ring is provided on a peripheral side wall of the terminal (41), and the terminal (41) is snap-fitted with the snap groove (34) by interference fit through the snap ring.

6. A high-voltage capacitor for a microwave oven as claimed in claim 4, wherein the peripheral side wall of the upper side of the terminal (41) and the peripheral side walls of the upper and lower taps (33, 31) are coated with an insulating coating.

7. A high voltage capacitor for a microwave oven as claimed in claim 1, wherein the outer side wall of the case (21) is provided with a heat sink (11).

8. A high-voltage capacitor for a microwave oven as claimed in claim 1, wherein the level of the insulating oil (23) is at least 5mm from the inner ceiling of the outer casing (21).

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