A microwave oven capacitor with a stable fixing structure

Abstract

The application discloses a microwave oven capacitor with a stable fixing structure, which comprises a shell, an interface is symmetrically and fixedly installed on the top of the shell, an explosion-proof device is fixedly connected to the top of the inner cavity of the shell, the interface is connected with the explosion-proof device through wires, a capacitor core is installed between the explosion-proof device and the inner wall of the shell, and the capacitor core is connected with the explosion-proof device through wires; and the application relates to the technical field of microwave oven capacitors. The microwave oven capacitor with the stable fixing structure is provided with a supporting cylinder, a contact piece, a sliding plate, a lower pressing plate and a cooperation adjusting mechanism, the contact piece can be pushed to expand to both sides, the convexes on the two sides of the contact piece make the contact piece and the connected circuit more stable, the contact piece and the connected circuit are separated by pressing the sleeve rod, the capacitor can be quickly plugged in and pulled out from the circuit, the interface can help the staff to quickly replace the damaged capacitor, and the capacitor and the connected circuit are stably connected, so that faults are avoided.

Description

Technical Field

[0001] This invention relates to the field of microwave oven capacitor technology, specifically to a microwave oven capacitor with a stable and fixed structure. Background Technology

[0002] Microwave oven capacitors are power capacitors without self-healing properties used in microwave ovens powered by 50Hz / 60Hz power supplies. They are connected to the main power circuit of the magnetron and are used to stabilize the magnetron current. Existing microwave oven capacitors have a structure including a shell, a capacitor core, a discharge resistor, epoxy resin, and lead terminals. The capacitor core is installed inside the shell and is sealed and fixed by epoxy resin. The lead terminals are connected to the capacitor core and extend out of the shell. The capacitor core is made by inductively winding a thin film as the dielectric and aluminum foil as the electrode, and then encapsulating it with a metal shell.

[0003] Existing capacitors are all enclosed installations, and their internal capacitor elements are prone to overheating, which can lead to the inability to dissipate internal heat and cause capacitor explosions. This not only affects the normal use of the device, but also easily causes some secondary disasters. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a microwave oven capacitor with a stable and fixed structure, thus solving the technical problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a microwave oven capacitor with a stable and fixed structure, comprising a shell, an interface symmetrically and fixedly installed on the top of the shell, an explosion-proof device fixedly connected to the top of the inner cavity of the shell, the interface being connected to the explosion-proof device via a wire, a capacitor core being installed between the explosion-proof device and the inner wall of the shell, and the capacitor core being connected to the explosion-proof device via a wire.

[0006] The interface includes a support cylinder fixedly installed on the top of the housing. The support cylinder has a contact piece inside, and a sliding plate is fixedly connected to both sides of the inner wall of the contact piece. A pressure plate is slidably connected between the two sliding plates. The support cylinder has an adjustment mechanism inside for adjusting the position of the pressure plate.

[0007] Preferably, the adjusting mechanism includes a support rod fixedly installed on the inner wall of the support cylinder, a fixed rod fixedly connected to the top of the support rod, sleeve rods sleeved at both ends of the fixed rod, the other end of the sleeve rod slidingly penetrating the support cylinder and fixedly connected to a button, fixed seats fixedly connected to corresponding ends of the two sleeve rods, a movable rod rotatably connected to the top of the fixed seat, the other end of the movable rod rotatably connected to the bottom of the lower pressure plate, and a spring sleeved on the outer wall of the fixed rod.

[0008] Preferably, the explosion-proof device includes an explosion-proof shell installed on the top of the inner cavity of the outer casing. The explosion-proof shell is hollow inside. A first wire is provided on both sides of the explosion-proof shell. One end of the first wire is connected to an interface, and the other end is connected to an explosion-proof wire. The other end of the explosion-proof wire is connected to a second wire. The other end of the second wire is connected to a connecting rod, and the explosion-proof wire is located inside the connecting rod. A Z-shaped hollow pipe is cut inside the connecting rod. The upper opening of the connecting rod corresponds to the lower opening of the explosion-proof shell. The other end of the second wire is connected to the capacitor core.

[0009] Preferably, the capacitor core is sealed and fixed by epoxy resin filling. The capacitor core is formed by winding a metallized film. The metallized film is formed by depositing a metal coating on an organic thin film medium. The sheet resistance of the metal coating is at least 14 ohms / hole. Multiple isolation strips extending along the winding length direction are formed on the metal coating to divide the metal coating into multiple segments. Each segment of the metal coating also serves as a capacitor plate, so that multiple capacitors are formed in series inside the wound capacitor core and installed in the housing.

[0010] Preferably, the isolation strips on the metal coating are of equal length and parallel to each other, and the organic thin film medium is a polypropylene film.

[0011] Preferably, the capacitor core has a circular structure, and the discharge resistor is connected in parallel at both ends of the capacitor core and placed in the middle through hole of the capacitor core.

[0012] Beneficial effects

[0013] This invention provides a microwave oven capacitor with a stable and fixed structure. Compared with the prior art, it has the following advantages:

[0014] (1) The microwave oven capacitor with a stable and fixed structure can push the contact piece to both sides by setting a support cylinder, contact piece, slide plate, and lower pressure plate in conjunction with the adjustment mechanism. The protrusions on both sides of the contact piece make the connection between the contact piece and the connected circuit more stable. By pressing the sleeve rod, the contact piece and the connected circuit are separated, so that the capacitor can be quickly plugged and unplugged from the circuit. The interface can not only help the staff to quickly replace the damaged capacitor, but also make the capacitor and the connected circuit stable and avoid failure.

[0015] (2) The microwave oven capacitor with a stable and fixed structure has an explosion-proof device that can cut off the capacitor circuit when the capacitor core is in danger of expansion, thus avoiding danger. When the capacitor core heats up and expands, the explosion-proof shell is lifted up and the connecting rod and the explosion-proof wire inside are pulled. When it expands excessively, the explosion-proof wire is broken, thereby cutting off the capacitor circuit and protecting the capacitor. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the external structure of the present invention;

[0017] Figure 2 This is a cross-sectional view of the outer shell structure in this invention;

[0018] Figure 3 This is a schematic diagram of the interface structure in this invention;

[0019] Figure 4 This is a schematic diagram of the unfolded capacitor core in this invention.

[0020] In the diagram: 1. Outer shell; 2. Interface; 3. Explosion-proof device; 4. Capacitor core; 201. Support cylinder; 202. Contact piece; 203. Slide plate; 204. Lower pressure plate; 205. Support rod; 206. Fixing rod; 208. Fixing base; 209. Movable rod; 210. Spring; 301. Explosion-proof shell; 302. First conductor; 303. Explosion-proof wire; 304. Second conductor; 305. Connecting rod; 401. Metallized film; 4011. Organic thin film dielectric; 4012. Metal plating; 402. Isolation strip. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figures 1-4 This invention provides a technical solution: a microwave oven capacitor with a stable and fixed structure, including a shell 1, an interface 2 symmetrically fixedly installed on the top of the shell 1, an explosion-proof device 3 fixedly connected to the top of the inner cavity of the shell 1, the interface 2 connected to the explosion-proof device 3 through a wire, a capacitor core 4 installed between the explosion-proof device 3 and the inner wall of the shell 1, the capacitor core 4 connected to the explosion-proof device 3 through a wire, the capacitor core 4 surrounded by epoxy resin for sealing and fixing, the capacitor core 5 impregnated in epoxy resin, the shell 1 is completely sealed, moisture-proof and damp-proof, the explosion-proof device 3 on the top is completely fitted to the shell 1 to prevent the internal epoxy resin from leaking, the explosion-proof device 3 prevents the capacitor from exploding due to heat caused by failure, avoiding secondary damage to electrical appliances, the interface 2 can facilitate quick replacement of the capacitor, reduce the labor intensity of maintenance personnel, and provide a stable connection for the capacitor, so that the capacitor can work stably;

[0023] like Figure 3As shown, interface 2 includes a support cylinder 201 fixedly installed on the top of the outer casing 1. Inside the support cylinder 201 is a contact piece 202, which is a metal sheet folded into a U-shape. Both ends of the contact piece 202 have protruding edges. Slide plates 203 are fixedly connected to both sides of the inner wall of the contact piece 202. The slide plates 203 have a triangular structure. A lower pressure plate 204 is slidably connected between the two slide plates 203. Inside the support cylinder 201 is an adjustment mechanism for adjusting the position of the lower pressure plate 204. The adjustment mechanism includes a support rod 205 fixedly installed on the inner wall of the support cylinder 201. A fixing rod 206 is fixedly connected to the top of the support rod 205. Sleeve rods 207 are sleeved at both ends of the fixing rod 206. The other end of the sleeve rod 207 slides through the support cylinder 201 and is fixedly connected to a button. Fixed seats 208 are fixedly connected to the corresponding ends of the two sleeve rods 207. A movable rod 209 is rotatably connected to the top of the fixed seat 208. The other end of the movable rod 209 is connected to the lower pressure plate 204. The bottom of plate 204 is rotatably connected, and a spring 210 is sleeved on the outer wall of the fixing rod 206. In this embodiment, under the elastic force of the spring 210, the sleeve rod 207 located on the fixing rod 206 can be pushed to move outward, thereby causing the sleeve rod 207 to drive the fixing seat 208 to move outward. The fixing seat 208 drives the movable rod 209 to move, thereby causing the lower pressure plate 204 to move downward on the contact piece 202. With the cooperation of the sliding plate 203, when the lower pressure plate 204 moves downward, it can push the contact piece 202 to unfold to both sides. With the protrusions on both sides of the contact piece 202, the connection between the contact piece 202 and the connected circuit is more stable. By pressing the sleeve rod 207, the fixing seat 208 is moved and the spring 210 is compressed. The fixing seat 208 pushes the lower pressure plate 204 upward through the movable rod 209, and the contact piece 202 is reset, so that the contact piece 202 is separated from the connected circuit, and the capacitor can be quickly plugged and unplugged from the circuit.

[0024] like Figure 2 As shown, the explosion-proof device 3 includes an explosion-proof shell 301 installed on the top of the inner cavity of the outer shell 1. The explosion-proof shell 301 is hollow inside. First wires 302 are provided on both sides of the explosion-proof shell 301. One end of the first wire 302 is connected to the interface 2, and the other end is connected to an explosion-proof wire 303. The other end of the explosion-proof wire 303 is connected to a second wire 304. The other end of the second wire 304 is connected to a connecting rod 305, and the explosion-proof wire 303 is located inside the connecting rod 305. A Z-shaped hollow pipe is cut inside the connecting rod 305. The upper opening of the connecting rod 305 corresponds to the lower opening of the explosion-proof shell 301. The other end of the second wire 304 is connected to the capacitor core 4. In this embodiment, when the capacitor core 4 expands due to heat caused by a fault, it will squeeze the explosion-proof shell 301, pull the connecting rod 305, and break the explosion-proof wire 303 inside the connecting rod 305, thereby cutting off the capacitor circuit and preventing the capacitor from damaging the circuit.

[0025] like Figure 4As shown, the capacitor core 4 is formed by winding a metallized film 401. The metallized film 401 is formed by depositing a metal coating 4012 onto an organic thin film dielectric 4011. The sheet resistance of the metal coating 4012 is at least 14 ohms / Ω. Multiple insulating strips 402 extending along the winding length of the metal coating 4012 are formed on the metal coating 4012, dividing the metal coating 4012 into multiple segments. Each segment of the metal coating also serves as a capacitor plate, resulting in multiple capacitors connected in series inside the wound capacitor core 4 and installed within the housing 1. The insulating strips 402 on the metal coating 4012 are of equal length and parallel to each other. The organic thin film dielectric 4011 is polypropylene. The thin film capacitor core 4 has a circular structure, and the discharge resistor is connected in parallel at both ends of the capacitor core 4 and placed in the middle through hole of the capacitor core 4. In this embodiment, since the capacitor core 4 adopts a metallized thin film multi-in-series non-inductive winding structure, the manufacturing process is greatly simplified and the manufacturing cost is reduced. At the same time, the product size is also greatly reduced, which is conducive to the promotion and application of the product. Furthermore, since multiple isolation strips are provided on the metal coating, multiple capacitor series structures are formed inside the wound capacitor core, which greatly improves the voltage withstand of the thin film capacitor. Moreover, the high sheet resistance requirement of the thin film makes the self-healing ability of the capacitor more excellent, thereby improving the stability of the product.

[0026] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0027] During operation, the protrusions of the contact piece 202 allow it to lock into place with the installed circuit, ensuring a stable connection. Under the elastic force of the spring 210, the sleeve 207 located on the fixed rod 206 moves outward, causing the sleeve 207 to move the fixed seat 208 outward. The fixed seat 208 then moves the movable rod 209, causing the lower pressure plate 204 to move downward on the contact piece 202. In conjunction with the sliding plate 203, as the lower pressure plate 204 moves downward, it pushes the contact piece 202 to unfold to both sides. The protrusions on both sides of the contact piece 202 further stabilize the connection between the contact piece 202 and the connected circuit. Pressing the sleeve 207 moves the fixed seat 208... The moving and compressing spring 210 causes the fixed base 208 to push the lower pressure plate 204 upward via the movable rod 209, resetting the contact piece 202 and separating it from the connected circuit. This allows the capacitor to be quickly plugged into and unplugged from the circuit, enabling the interface 2 to help workers quickly replace damaged capacitors and ensure a stable connection between the capacitor and the connected circuit, preventing malfunctions. When the capacitor core 4 expands due to heat caused by a malfunction, it will squeeze the explosion-proof shell 301, pulling the connecting rod 305 and breaking the explosion-proof wire 303 inside the connecting rod 305, thereby cutting off the capacitor circuit, preventing the capacitor from damaging the circuit, and protecting the connected circuit. This is the working principle of a microwave oven capacitor with a stable and fixed structure.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A microwave oven capacitor with a stable and fixed structure, comprising a housing (1), characterized in that: An interface (2) is symmetrically fixedly installed on the top of the outer shell (1). An explosion-proof device (3) is fixedly connected to the top of the inner cavity of the outer shell (1). The interface (2) is connected to the explosion-proof device (3) through a wire. A capacitor core (4) is installed between the explosion-proof device (3) and the inner wall of the outer shell (1). The capacitor core (4) is connected to the explosion-proof device (3) through a wire. The interface (2) includes a support cylinder (201) fixedly installed on the top of the outer shell (1). The support cylinder (201) is provided with a contact piece (202). The inner walls of the contact piece (202) are fixedly connected with sliding plates (203). A lower pressure plate (204) is slidably connected between the two sliding plates (203). The support cylinder (201) is provided with an adjustment mechanism for adjusting the position of the lower pressure plate (204). The adjustment mechanism includes a support rod (205) fixedly installed on the inner wall of the support cylinder (201). A fixing rod (206) is fixedly connected to the top of the support rod (205). Sleeve rods (207) are sleeved at both ends of the fixing rod (206). The other end of the sleeve rod (207) slides through the support cylinder (201) and is fixedly connected to a button. Fixed seats (208) are fixedly connected to the corresponding ends of the two sleeve rods (207). A movable rod (209) is rotatably connected to the top of the fixed seat (208). The other end of the movable rod (209) is rotatably connected to the bottom of the lower pressure plate (204). A spring (210) is sleeved on the outer wall of the fixing rod (206).

2. A microwave oven capacitor with a stable fixed structure according to claim 1, characterized in that: The explosion-proof device (3) includes an explosion-proof shell (301) installed on the top of the inner cavity of the outer shell (1). The explosion-proof shell (301) is hollow inside. A first wire (302) is provided on both sides of the explosion-proof shell (301). One end of the first wire (302) is connected to the interface (2), and the other end is connected to an explosion-proof wire (303). The other end of the explosion-proof wire (303) is connected to a second wire (304). The explosion-proof wire (303) is located inside the connecting rod (305). A Z-shaped hollow pipe is dug inside the connecting rod (305). The upper opening of the connecting rod (305) corresponds to the lower opening of the explosion-proof shell (301). The other end of the second wire (304) is connected to the capacitor core (4).

3. A microwave oven capacitor with a stable fixed structure according to claim 1, characterized in that: The capacitor core (4) is sealed and fixed by epoxy resin. The capacitor core (4) is formed by winding a metallized film (401). The metallized film (401) is formed by depositing a metal coating (4012) on an organic thin film medium (4011). The sheet resistance of the metal coating (4012) is at least 14 ohms / hole. The metal coating (4012) has multiple isolation strips (402) extending along its winding length direction to divide the metal coating (4012) into multiple segments. Each segment of the metal coating also serves as a capacitor plate, so that multiple capacitor series structures are formed inside the wound capacitor core (4) and installed in the outer shell (1).

4. A microwave oven capacitor with a stable fixed structure according to claim 3, characterized in that: The isolation strips (402) on the metal coating (4012) are of equal length and parallel to each other, and the organic thin film medium (4011) is a polypropylene film.

5. A microwave oven capacitor with a stable fixed structure according to claim 1, characterized in that: The capacitor core (4) has a cylindrical structure, and the discharge resistor is connected in parallel at both ends of the capacitor core (4) and placed in the middle through hole of the capacitor core (4).

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