CN102436931B - Anti-explosion microwave oven capacitor - Google Patents
Anti-explosion microwave oven capacitor Download PDFInfo
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- CN102436931B CN102436931B CN201110217996.8A CN201110217996A CN102436931B CN 102436931 B CN102436931 B CN 102436931B CN 201110217996 A CN201110217996 A CN 201110217996A CN 102436931 B CN102436931 B CN 102436931B
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Abstract
The invention belongs to the technical field of electronic components, and provides an anti-explosion microwave oven capacitor. The capacitor comprises an outer shell, a capacitor cover, an anti-explosion positioning block, two plug-in cards and a capacitor core, wherein the capacitor cover is closely meshed on the open end of the outer shell, the outer shell is provided with an inner cavity, insulating oil is filled in the inner cavity, and the capacitor core is accommodated in the inner cavity; the microwave capacitor also comprises two rivets, two eduction pieces are arranged on the capacitor core, and one ends of the two rivets stretch out the outer side of the capacitor cover so as to be connected with the plug-in cards; and the other end of each rivet and two eduction pieces of the capacitor core are connected together in a spot welding mode respectively through the anti-explosion positioning block, each rivet and the eduction pieces of the capacitor core are connected and pulled tightly so as to keep swollen tightness force. The capacitor provided by the invention has the advantages that the structure is simple, processing is convenient, when the capacitor insulation degree is dropped, supernormal heat is generated, internal pressure is increased, the capacitor cover is transformed and expanded, mechanical shift snaps the eduction pieces so as to achieve explosion protection, the whole capacitor not only has large capacity and but also has a safe and reliable explosionproof effect.
Description
Technical field
The invention belongs to technical field of electronic components, relate to a kind of capacitor, relate in particular to a kind of anti-explosion microwave oven capacitor.
Background technology
Capacitor for microwave oven is element indispensable in microwave oven, existing capacitor for microwave oven generally comprises metal shell, liquid potting compound, fuse lead-out tablet, capacitor core and (with polypropylene screen or kraft capacitor paper, does medium, aluminium foil is done electrode, through being wound into).In early stage capacitor for microwave oven, generally without blast resistance construction, (blast resistance construction is that blast resistance construction can move and forms open circuit when product has problems, product is disconnected from the circuit), like this when electric capacity reaches the working life limit, insulation degree declines, product can not be disconnected from the circuit, produce extraordinary heat to making capacitor cover deformed dilation, final explosion, leakage, on fire, exist so serious safety and reliability, so explosion-proof performance problem that each enterprise payes attention to most always of capacitor, people had increased explosion-proof line on the basis of microwave oven in early days afterwards, method by breaking explosion-proof line is to reach the function of blocking circuit, if but this explosion-proof line is excessively thick, will exist and cannot break explosion-proof line, can not play explosion-proof effect, if explosion-proof line is meticulous, not only easily explosion-proof line is broken when mounted, and the electric current that thinner explosion-proof line passes through is limited, can only be for the less capacitor of capacity relative.
Summary of the invention
Technical problem to be solved by this invention is the present situation for prior art, and provides a kind of capacity large, the anti-explosion microwave oven capacitor that explosion-proof effect is safe and reliable.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of anti-explosion microwave oven capacitor, comprise shell, capacitance cover, two inserted sheets and capacitor core, described capacitance cover is closely engaged in the openend of shell, described shell has inner chamber, in inner chamber, be perfused with insulating oil, capacitor core is contained in inner chamber, it is characterized in that, this microwave capacitors device also includes two rivets, on capacitor core, be provided with two lead-out tablets, the outside that capacitance cover is extended in one end of two described rivets is connected with two inserted sheets respectively, the other end of two rivets links together with two lead-out tablet spot welding of capacitor core respectively, described rivet makes lead-out tablet tension after being connected with the lead-out tablet of capacitor core, and keep the expanding force of vertical direction.
The measure of taking for optimization such scheme specifically comprises:
In above-mentioned a kind of anti-explosion microwave oven capacitor, between described capacitance cover and capacitor core, be also provided with explosion-proof locating piece, described explosion-proof locating piece covers in the outside of rivet, on explosion-proof locating piece, offer two location holes, the lead-out tablet of described capacitor core is affixed on location hole and links together with rivet spot welding.Here by location hole, not only facilitated being welded to connect of lead-out tablet and rivet, by location hole, the position of lead-out tablet has been positioned simultaneously, prevented from occurring deviation with rivet closure.
Here explosion-proof effect quality depends on the design of explosion-proof locating piece, the factors such as sealing of installation site and capacitor, owing to by location hole, two lead-out tablets and riveting spot welding being connected and straining and keep the expanding force of vertical direction, when capacitor insulation degree declines, produce extraordinary heat, interior pressure increases, and capacitance cover distortion, expands, mechanical displacement is broken lead-out tablet, because power supply joins by lead-out tablet and capacitor, lead-out tablet disconnects and equals dump, just reaches explosion-proof effect.
In above-mentioned a kind of anti-explosion microwave oven capacitor, between two lead-out tablets of described capacitor core, also cover has heelpiece, on described heelpiece laminating and the bottom surface of explosion-proof locating piece.Here by heelpiece, guarantee on the one hand the accuracy of lead-out tablet installation site, thereby be conveniently welded to connect with rivet, make to weld the expanding force of rear maintenance vertical direction, well butt welding contact plays a protective role on the other hand.
In above-mentioned a kind of anti-explosion microwave oven capacitor, described inserted sheet and the rivet centre position between capacitance cover are provided with silicagel pad, in the surrounding of inserted sheet, are provided with insulating base.It is mainly to play sealing to completely cut off and fixing effect that silicagel pad is set here, makes the circuit of electric capacity inside with outside isolated, prevents that external factor from affecting the work of electric capacity; Insulating base is in order to facilitate inserted sheet to be connected with external power source, accomplishes and other parts insulation.
In above-mentioned a kind of anti-explosion microwave oven capacitor, between described rivet and capacitance cover, be provided with insulating board, described insulating board is by rivet and capacitance cover isolation.Here by insulating board, mainly play the effect of insulation.
In above-mentioned a kind of anti-explosion microwave oven capacitor, between two described rivets, be also connected with discharge resistance, the resistance of described discharge resistance is 10M Ω.Here discharge resistance is as the bleeder resistance of high-voltage capacitance after microwave oven shutdown, thereby guarantees to use safety.
In above-mentioned a kind of anti-explosion microwave oven capacitor, the inconsistent formation in bottom of described explosion-proof locating piece and capacitance cover completely cuts off chamber, and described rivet, insulating board and discharge resistance are all positioned at isolated chamber.Here the isolated chamber by explosion-proof locating piece covers in the outsides such as rivet, insulating board and discharge resistance, when the whole capacitor of processing, do not need like this structure of original electric capacity the inside to change, only need on capacitor core, process lead-out tablet can complete, play in addition good sealing effectiveness, guarantee explosion-proof performance.
In above-mentioned a kind of anti-explosion microwave oven capacitor, this anti-explosion microwave oven capacitor forms half-wave voltage doubler with high-voltage diode, and the alternating voltage of the secondary output of high-tension transformer of power supply input is obtained to two times of required high direct voltages of anode of magnetron after half-wave voltage multiplying rectifier.Here mainly make " multiplication of voltage " effect of playing of capacitor, can make high-tension transformer weight reduction and the reduced volume of power supply input.
Compared with prior art, the invention has the advantages that simple in structure, easy to process, by explosion-proof locating piece and capacitance cover are conflicted, and in location hole, the lead-out tablet of capacitor core be connected with rivet spot welding and strain the expanding force that keeps vertical direction, like this when capacitor insulation degree declines, produce extraordinary heat, interior pressure increases, and capacitance cover distortion, expands, mechanical displacement is broken lead-out tablet, just reach explosion-proof, whole capacitor not only capacity is large, and explosion-proof effect is safe and reliable.
Accompanying drawing explanation
Fig. 1 is the sectional structure schematic diagram of this anti-explosion microwave oven capacitor;
Fig. 2 is the circuit theory diagrams of this anti-explosion microwave oven capacitor;
Fig. 3 is the circuit theory diagrams that this anti-explosion microwave oven capacitor high-voltage diode forms half-wave voltage doubler.
Embodiment
Be below specific embodiments of the invention by reference to the accompanying drawings, technical scheme of the present invention is further described, but the present invention be not limited to these embodiment.
In figure, shell 1; Inner chamber 1a; Capacitance cover 2; Inserted sheet 3; Capacitor core 4; Insulating oil 5; Rivet 6; Lead-out tablet 7; Silicagel pad 8; Insulating base 9; Insulating board 10; Explosion-proof locating piece 11; Isolated chamber 11a; Location hole 12; Discharge resistance 13; Diode 14; Heelpiece 15.
As shown in Figure 1, this anti-explosion microwave oven capacitor, comprise shell 1, capacitance cover 2, two inserted sheets 3 and capacitor cores 4, here capacitor core 4 is done medium with polypropylene screen or kraft capacitor paper, and aluminium foil is done electrode through being wound into, and capacitance cover 2 is closely engaged in the openend of shell 1, shell 1 has inner chamber 1a, in inner chamber 1a, be perfused with insulating oil 5, play the effect of heat radiation and insulation by insulating oil 5, capacitor core 4 is contained in inner chamber 1a.
In order to reach explosion-proof effect, this microwave capacitors device also includes two rivets 6, on capacitor core 4, be provided with two lead-out tablets 7, rivet 6 centre positions between inserted sheet 3 and capacitance cover 2 are provided with silicagel pad 8, surrounding at inserted sheet 3 is provided with insulating base 9, it is mainly to play sealing to completely cut off and fixing effect that silicagel pad 8 is set here, and insulating base 9 is in order to facilitate inserted sheet 3 to be connected with external power source, accomplishes and other parts insulation.For by rivet 6 and capacitance cover 2 isolation, between rivet 6 and capacitance cover 2, be provided with insulating board 10; The outside that capacitance cover 2 is extended in one end of two rivets 6 is connected with two inserted sheets 3 respectively, and the other end of two rivets 6 is connected together by scolding tin seal point is soldered with two lead-out tablets 7 of capacitor core 4 respectively.
In order to have facilitated being welded to connect of lead-out tablet 7 and rivet 6, the position of lead-out tablet 7 is positioned simultaneously, prevent from occurring deviation with rivet 6 closures, between capacitance cover 2 and capacitor core 4, be also provided with explosion-proof locating piece 11, between two lead-out tablets 7 of capacitor core 4, also cover has heelpiece 15, on the bottom surface of heelpiece 15 laminatings and explosion-proof locating piece 11, explosion-proof locating piece 11 covers in the outside of rivet 6, on explosion-proof locating piece 11, offer two location holes 12, the lead-out tablet 7 of capacitor core 4 makes lead-out tablet 7 tensions after being affixed on and being connected with the lead-out tablet 7 of capacitor core 4 with rivet 6 spot welding connection rivets 6 on location hole 12, and keep the expanding force of vertical direction.
As shown in Figure 2, in order to guarantee to use safety, between two rivets 6, be also connected with discharge resistance 13, the resistance of discharge resistance 13 is 10M Ω, and discharge resistance 13 is directly connected to the inside of capacitor as the bleeder resistance of the rear high-voltage capacitance of microwave oven shutdown here.
Because explosion-proof effect quality here depends on the design of explosion-proof locating piece 11, the factors such as sealing of installation site and capacitor, therefore when design, make explosion-proof locating piece 11 and the inconsistent formation in bottom of capacitance cover 2 completely cut off chamber 11a, rivet 6, insulating board 10 and discharge resistance 13 are all positioned at isolated chamber 11a.Here the isolated chamber 11a by explosion-proof locating piece 11 covers in the outsides such as rivet 6, insulating board 10 and discharge resistance 13, when the whole capacitor of processing, do not need like this structure of original capacitor the inside to change, only need on capacitor core 4, process lead-out tablet 7 can complete, play in addition good sealing effectiveness and location and installation position, guarantee explosion-proof performance.
This anti-explosion microwave oven capacitor Main Function is " multiplication of voltage " effect, as shown in Figure 3, during use and high-voltage diode 14 form half-wave voltage doublers, and the alternating voltage of the secondary output of high-tension transformer of power supply input is obtained to two times of required high direct voltages of anode of magnetron after half-wave voltage multiplying rectifier.Here mainly make " multiplication of voltage " effect of playing of capacitor, can make high-tension transformer weight reduction and the reduced volume of power supply input, second effect is exactly its " energy-conservation " effect, due to this capacitor use power supply input high-tension transformer be not common common transformer, but a kind of high-tension transformer with " leakage field " characteristic, utilize " leakage field " principle to reach to microwave oven magnetic filament voltage, anode voltage automatic voltage regulation object, but due to the impact that exists leakage inductance current phase to lag behind, can make microwave oven reduce the utilization ratio of electric energy, and the reactance characteristic of this capacitor is just contrary with the reactance characteristic of leakage inductance, can make current phase leading, the leakage inductance electric current that phase place is lagged behind has good compensating action, can improve microwave power factor.
During explosion-proof work because explosion-proof locating piece 11 and capacitance cover 2 are conflicted, and at the interior expanding force that the lead-out tablet of capacitor core 47 is connected with rivet 6 spot welding and strains maintenance vertical direction of location hole 12, when capacitor insulation degree declines, produce extraordinary heat like this, interior pressure increases, capacitance cover 2 distortion, expand, mechanical displacement is just broken the lead-out tablet 7 of tensioner, because power supply joins by lead-out tablet 7 and capacitor, lead-out tablet 7 disconnects and equals dump, just reaches explosion-proof effect.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various modifications or supplement or adopt similar mode to substitute described specific embodiment, but can't depart from the defined scope of spirit of the present invention.
Claims (3)
1. an anti-explosion microwave oven capacitor, comprise shell (1), capacitance cover (2), two inserted sheets (3) and capacitor core (4), described capacitance cover (2) is closely engaged in the openend of shell (1), described shell (1) has inner chamber (1a), in inner chamber (1a), be perfused with insulating oil (5), capacitor core (4) is contained in inner chamber (1a), it is characterized in that, this microwave capacitors device also includes two rivets (6), on capacitor core (4), be provided with two lead-out tablets (7), the outside that capacitance cover (2) is extended in one end of described two rivets (6) is connected with two inserted sheets (3) respectively, the other end of two rivets (6) links together with two lead-out tablets (7) spot welding of capacitor core (4) respectively, described rivet (6) makes lead-out tablet (7) tension after being connected with the lead-out tablet (7) of capacitor core (4), and keep the expanding force of vertical direction, between described two rivets (6), be also connected with discharge resistance (13), the resistance of described discharge resistance (13) is 10M Ω, described explosion-proof locating piece (11) and the isolated chamber (11a) of the inconsistent formation in bottom of capacitance cover (2), described rivet (6), insulating board (10) and discharge resistance (13) are all positioned at isolated chamber (11a), this anti-explosion microwave oven capacitor forms half-wave voltage doubler with high-voltage diode (14), and the alternating voltage of the secondary output of high-tension transformer of power supply input is obtained to two times of required high direct voltages of anode of magnetron after half-wave voltage multiplying rectifier, between described capacitance cover (2) and capacitor core (4), be also provided with explosion-proof locating piece (11), described explosion-proof locating piece (11) covers in the outside of rivet (6), on explosion-proof locating piece (11), offer two location holes (12), the lead-out tablet (7) of described capacitor core (4) is affixed on location hole (12) above and rivet (6) spot welding links together, between two lead-out tablets (7) of described capacitor core (4), also cover has heelpiece (15), on the bottom surface of described heelpiece (15) laminating and explosion-proof locating piece (11).
2. a kind of anti-explosion microwave oven capacitor according to claim 1, it is characterized in that, rivet (6) centre position between described inserted sheet (3) and capacitance cover (2) is provided with silicagel pad (8), in the surrounding of inserted sheet (3), is provided with insulating base (9).
3. a kind of anti-explosion microwave oven capacitor according to claim 1 and 2, it is characterized in that, between described rivet (6) and capacitance cover (2), be provided with insulating board (10), described insulating board (10) is by rivet (6) and capacitance cover (2) isolation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110217996.8A CN102436931B (en) | 2011-07-26 | 2011-07-26 | Anti-explosion microwave oven capacitor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110217996.8A CN102436931B (en) | 2011-07-26 | 2011-07-26 | Anti-explosion microwave oven capacitor |
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| CN102436931A CN102436931A (en) | 2012-05-02 |
| CN102436931B true CN102436931B (en) | 2014-03-26 |
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| CN201110217996.8A Active CN102436931B (en) | 2011-07-26 | 2011-07-26 | Anti-explosion microwave oven capacitor |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103123866A (en) * | 2013-01-28 | 2013-05-29 | 合肥荣事达三洋电器股份有限公司 | High-voltage capacitor used for microwave oven |
| CN103151166B (en) * | 2013-03-11 | 2016-05-04 | 宁波碧彩实业有限公司 | Dry type capacitor for microwave oven |
| CN105097287A (en) * | 2015-09-14 | 2015-11-25 | 安徽富吉电容有限责任公司 | Novel waterproof and explosion-prevention capacitor |
| CN105118668B (en) * | 2015-09-24 | 2018-02-09 | 宁波碧彩实业有限公司 | A kind of explosion-proof combined capacitor |
| CN109036848B (en) * | 2018-08-29 | 2024-01-09 | 广东明路电力电子有限公司 | Capacitor of microwave oven |
| CN112002552B (en) * | 2020-08-24 | 2022-02-18 | 安徽源光电器有限公司 | Self-healing metallized film dry capacitor for microwave oven |
| CN114334445A (en) * | 2021-12-29 | 2022-04-12 | 安徽源光电器有限公司 | 2800VAC high-voltage microwave capacitor for medical equipment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101364481A (en) * | 2008-09-23 | 2009-02-11 | 宁波碧彩实业有限公司 | High-voltage capacitor having rectifying apparatus |
| CN202150352U (en) * | 2011-07-14 | 2012-02-22 | 宁波碧彩实业有限公司 | Capacitor for microwave oven |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101527200B (en) * | 2009-04-15 | 2012-09-26 | 宁波碧彩实业有限公司 | Firing and explosion prevention high voltage capacitor |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101364481A (en) * | 2008-09-23 | 2009-02-11 | 宁波碧彩实业有限公司 | High-voltage capacitor having rectifying apparatus |
| CN202150352U (en) * | 2011-07-14 | 2012-02-22 | 宁波碧彩实业有限公司 | Capacitor for microwave oven |
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| CN102436931A (en) | 2012-05-02 |
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