Industrial grade microwave capacitor

Abstract

The utility model relates to the technical field of capacitors, and provides an industrial grade microwave capacitor, which comprises an insulating seat, a flat rapid connection insertion sheet, a cover group structure, an aluminum shell, insulating oil, a core and outer wrapping paper, the cover group structure is arranged at the top of the aluminum shell, the insulating seat is arranged at the top of the cover group structure, and the flat rapid connection insertion sheet is arranged on the insulating seat. The flat rapid connection insertion sheet is arranged in the insulation seat, the core is arranged in the aluminum shell, the core is connected with a component of the cover group mechanism, the outer wrapping paper is arranged on the outer side of the core, and the insulation oil is arranged in the aluminum shell; when the capacitor core is wound to a half distance, the upper-layer aluminum foil is cut off, and the two lead-out sheets are both placed on the upper-layer aluminum foil and are respectively placed on one side of the cut aluminum foil, so that an inner string structure is formed, which is equivalent to that two capacitors are connected in series, and the voltage withstanding performance of the capacitor can be greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of capacitors, in particular to an industrial-grade microwave capacitor. Background Art

[0002] When the microwave oven is working, the user's household voltage AC220V will be added to the primary of the high-voltage transformer, and its secondary outputs two sets of AC voltages of 3V~4V and 1800V~2230V. The 3V~4V AC voltage directly powers the magnetron filament, and the 1800V~2230V AC voltage is converted into a negative DC voltage of 3600V~4500V after being doubled, rectified and filtered by the microwave oven capacitor and the high-voltage diode, and then added to the cathode of the magnetron. When the magnetron has the filament voltage and the voltage difference between the anode (ground) and the cathode is greater than 3500V, a 2450MHz ultra-high frequency electromagnetic wave, i.e., microwave, is generated and emitted into the food in the oven cavity. Under the high frequency of microwaves, the polar molecules inside the food collide and rub back and forth to generate heat, thereby heating the food. Among them, the microwave oven capacitor is one of the important components of the microwave oven. The circuit composed of it and the high-voltage diode can double the AC voltage and rectify it into the DC high voltage required by the magnetron.

[0003] However, due to the high intensity of use of industrial microwave ovens and the poor use environment, the current capacitor core structure generally adopts a conventional winding structure, and the upper and lower layers of aluminum foil each lead out a lead sheet, resulting in poor voltage resistance. In view of this, this application is specially proposed. Utility Model Content

[0004] The present application proposes an industrial-grade microwave capacitor to solve the technical problem that the conventional winding structure of the capacitor's internal core structure in the prior art generally uses a conventional winding structure, and the upper and lower layers of aluminum foil each lead out a lead sheet, resulting in poor voltage resistance. The above technical objectives of the utility model are achieved through the following technical solutions:

[0005] An industrial-grade microwave capacitor comprises an insulating seat, a flat quick-connect plug, a cover assembly structure, an aluminum shell, insulating oil, a core and outer wrapping paper, wherein the cover assembly structure is arranged on the top of the aluminum shell, the insulating seat is arranged on the top of the cover assembly structure, the flat quick-connect plug is arranged in the insulating seat, the core is arranged in the aluminum shell, the core is connected to a component of the cover assembly mechanism, the outer wrapping paper is arranged on the outside of the core, and the insulating oil is arranged in the aluminum shell;

[0006] The core comprises two insulating layers and two layers of aluminum foil, wherein the insulating layers and the aluminum foil are stacked and wound in staggered layers, and the uppermost layer of the aluminum foil is provided with a middle partition.

[0007] Furthermore, the cover assembly structure comprises a sealing gasket, a cover, an insulating cardboard, a resistor (7) and a rivet, wherein the rivet head is connected to the core lead-out plate, the cover is arranged on the aluminum shell, the rivet passes through the cover, the high-voltage resistor is arranged between the cover and the rivet, the insulating cardboard is arranged between the high-voltage resistor and the cover, the sealing gasket is arranged on the top of the cover, and the rivet passes through the high-voltage resistor pin, the insulating cardboard and the sealing gasket in sequence to be connected to the lower side of the flat quick-connect plug.

[0008] Furthermore, the insulating layer is a three-layer polypropylene film.

[0009] Furthermore, the height of the insulating seat is 22 mm.

[0010] Furthermore, the insulating seat is an epoxy molding compound insulating seat.

[0011] Furthermore, the side edge of the cover is connected to the aluminum shell through double crimping.

[0012] Compared with the prior art, the beneficial effects of the utility model include: when the capacitor core is wound to half the distance, the upper aluminum foil is cut off, and the two lead sheets are placed on the upper aluminum foil, each on the side of the cut aluminum foil, so as to change to an inner series structure, which is equivalent to connecting two capacitors in series, and can greatly improve the withstand voltage performance of the capacitor;

[0013] By setting the height of the insulating seat to 22mm, the creepage distance between the two terminals can be increased to ensure better insulation performance of the capacitor;

[0014] By using epoxy molding compound insulation seat, epoxy molding compound has better anti-tracking ability and can be used in areas with harsh environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the assembly cover structure of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the capacitor of the utility model;

[0017] Figure 3 This is a schematic diagram of the end face of the core of the utility model;

[0018] Figure 4 This is a schematic diagram of the core layer of the utility model;

[0019] In the figure: 1. Insulating seat; 2. Flat quick-connect plug; 3. Cover; 4. Sealing gasket; 5. Insulating cardboard; 6. Rivet; 7. High-voltage resistor; 8. Aluminum shell; 9. Insulating oil; 10. Core; 11. Outer paper. DETAILED DESCRIPTION

[0020] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0023] Please see attached Figure 1-4 , an industrial-grade microwave capacitor, comprising an insulating seat 1, a flat quick-connect plug 2, a cover group structure, an aluminum shell 8, insulating oil 9, a core 10 and an outer wrapping paper 11, the cover group structure is arranged on the top of the aluminum shell 8, the insulating seat 1 is arranged on the top of the cover group structure, the insulating seat 1 is to facilitate the flat quick-connect plug 2 to be connected to an external power supply, and to be insulated from other components, the flat quick-connect plug 2 is arranged in the insulating seat 1, the core 10 is arranged in the aluminum shell 8, the core 10 is connected to the components of the cover group mechanism, the outer wrapping paper 11 is arranged on the outside of the core 10, and the insulating oil 9 is arranged in the aluminum shell 8;

[0024] The core 10 includes two insulating layers and two layers of aluminum foil, which are stacked and wound in staggered layers, and the uppermost layer of aluminum foil is provided as a middle partition.

[0025] By adopting the above technical scheme, by changing the structure of the core 10, when the capacitor core 10 is wound to half the distance, the upper aluminum foil is cut off, and the two lead sheets are placed on the upper aluminum foil, each on the side of the cut aluminum foil, so that it is changed to an internal series structure, which is equivalent to two capacitors connected in series, and can greatly improve the voltage resistance performance of the capacitor. In a poor use environment and under a high use intensity, the capacitor has a certain voltage resistance performance.

[0026] In some embodiments, the cover group structure includes a sealing gasket 4, a cover 3, an insulating cardboard 5, a resistor 7 and a rivet 6, the head of the rivet 6 is connected to the lead-out plate of the core 10, the cover 3 is set on the aluminum shell 8, the side of the cover 3 is connected to the aluminum shell 8 through a double curling, the rivet 6 passes through the cover 3, the high-voltage resistor 7 is set between the cover 3 and the rivet 6, the high-voltage resistor 7 is directly connected to the inside of the capacitor as a discharge resistor 7 of the high-voltage capacitor after the microwave oven is turned off, the insulating cardboard 5 is set between the high-voltage resistor 7 and the cover 3, the sealing gasket 4 is set on the top of the cover 3, the sealing gasket 4 plays a role of sealing, isolation and fixing, the rivet 6 passes through the pin of the high-voltage resistor 7, the insulating cardboard 5 and the sealing gasket 4 in sequence and is connected to the lower side of the flat quick-connect plug 2, and the cover group structure is fixed by the rivet 6.

[0027] In some embodiments, the insulating layer is a three-layer polypropylene film.

[0028] By adopting the above technical scheme, the voltage resistance of polypropylene film is higher than that of capacitor paper. Practical polypropylene film can further improve the voltage resistance of capacitors and make the product more reliable.

[0029] In some embodiments, the height of the insulating base 1 is 22 mm.

[0030] By adopting the above technical solution and setting the height of the insulating seat 1 to 22 mm, the creepage distance between the two terminals can be increased, thereby ensuring better insulation performance of the capacitor.

[0031] In some embodiments, the insulating base 1 is an epoxy molding compound insulating base 1 .

[0032] With the above technical solution, the PTI value of epoxy molding compound is ≥300V, so the use of epoxy molding compound has better anti-tracking ability and can be used in areas with harsh environments.

[0033] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation on the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the claims attached to the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the attached claims, or the equivalent forms of such scope and boundaries.

Claims

1. An industrial-grade microwave capacitor, characterized in that: The invention comprises an insulating seat (1), a flat quick-connect plug (2), a cover group structure, an aluminum shell (8), insulating oil (9), a core (10) and an outer wrapping paper (11), wherein the cover group structure is arranged on the top of the aluminum shell (8), the insulating seat (1) is arranged on the top of the cover group structure, the flat quick-connect plug (2) is arranged in the insulating seat (1), the core (10) is arranged in the aluminum shell (8), the core (10) is connected to a component of the cover group structure, the outer wrapping paper (11) is arranged on the outside of the core (10), and the insulating oil (9) is arranged in the aluminum shell (8); The core (10) comprises two insulating layers and two layers of aluminum foil, wherein the insulating layers and the aluminum foil are stacked and wound in staggered layers, and the uppermost layer of the aluminum foil is provided as a middle partition; The cover assembly structure comprises a sealing gasket (4), a cover (3), an insulating paperboard (5), a resistor (7) and a rivet (6); the head of the rivet (6) is connected to the lead-out plate of the core (10); the cover (3) is arranged on the aluminum shell (8); the rivet (6) passes through the cover (3); the resistor (7) is arranged between the cover (3) and the rivet (6); the insulating paperboard (5) is arranged between the resistor (7) and the cover (3); the sealing gasket (4) is arranged on the top of the cover (3); the rivet (6) passes through the pin of the resistor (7), the insulating paperboard (5) and the sealing gasket (4) in sequence to be connected to the lower side of the flat quick-connect plug (2).

2. An industrial-grade microwave capacitor according to claim 1, characterized in that: The insulating layer is a three-layer polypropylene film.

3. An industrial-grade microwave capacitor according to claim 1, characterized in that: The height of the insulating seat (1) is 22 mm.

4. The industrial-grade microwave capacitor according to claim 1, characterized in that: The insulating seat (1) is an epoxy molding plastic insulating seat (1).

5. The industrial-grade microwave capacitor according to claim 2, characterized in that: The side edge of the cover (3) is connected to the aluminum shell (8) via double crimping.

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