CN112786411A

CN112786411A - Magnetron filtering component, magnetron and household appliance

Info

Publication number: CN112786411A
Application number: CN202011615662.1A
Authority: CN
Inventors: 施志雄; 梁定军; 罗良敏; 侯俊峰; 张昀; 王贤友; 胡建; 唐相伟
Original assignee: Midea Group Co Ltd; Guangdong Midea White Goods Technology Innovation Center Co Ltd
Current assignee: Midea Group Co Ltd; Guangdong Midea White Goods Technology Innovation Center Co Ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-05-11
Anticipated expiration: 2040-12-30
Also published as: CN112786411B

Abstract

The application provides a magnetron filtering subassembly, magnetron and domestic appliance, this magnetron filtering subassembly includes: the cathode terminal of the magnetron penetrates through the bottom of the shielding box, and one end of the cathode terminal is connected with the cathode of the magnetron. And the hollow coil is arranged in the shielding box, and one end of the hollow coil is connected with the other end of the cathode wiring terminal. The feed-through capacitor assembly penetrates through the side wall of the shielding box and comprises an internal outgoing line led out into the shielding box, and the internal outgoing line is connected with the other end of the hollow coil. The feed-through capacitor assembly comprises an external outgoing line led out to the outside of the shielding box, one end of the external outgoing line is connected with the internal outgoing line, the other end of the external outgoing line is arranged around a consumption medium and used for being connected with a power supply, and the consumption medium is used for consuming electromagnetic waves led out along the external outgoing line. Through the mode, the size of the shielding box can be reduced, and further the size of the magnetron is reduced.

Description

Magnetron filtering component, magnetron and household appliance

Technical Field

The application relates to the technical field of magnetrons, in particular to a magnetron filtering component, a magnetron and a household appliance.

Background

The magnetron is a vacuum electron tube for generating microwave, and the common filter device used in the magnetron at present consists of a shielding box and a filter component arranged in the shielding box, wherein the shielding box is a metal box for shielding, and the filter component is formed by connecting a capacitor and an inductor. The filtering device can effectively prevent noise transmitted from the terminal of the vacuum tube from propagating along the power supply line or radiating outside the shielding box.

Because of the working characteristics of the magnetron, when the magnetron works normally, negative high voltage is connected to the filtering component of the magnetron, and in order to prevent sparking between the filtering component and the shielding component, the relative distance between the filtering component and the shielding component needs to be ensured during design. With the continuous upgrade of the magnetron and the miniaturization requirement of the household microwave oven, the size of the magnetron is gradually developing towards miniaturization, so the size optimization of the shielding component is also very important.

Disclosure of Invention

The application provides a magnetron filtering component, a magnetron and a household appliance, which are used for reducing the volume of the magnetron.

In order to solve the above technical problem, the present application provides a magnetron filter assembly, including: the cathode terminal of the magnetron penetrates through the bottom of the shielding box, and one end of the cathode terminal is connected with the cathode of the magnetron. And the hollow coil is arranged in the shielding box, and one end of the hollow coil is connected with the other end of the cathode wiring terminal. The feed-through capacitor assembly penetrates through the side wall of the shielding box and comprises an internal outgoing line led out into the shielding box, and the internal outgoing line is connected with the other end of the hollow coil. The feed-through capacitor assembly comprises an external outgoing line led out to the outside of the shielding box, one end of the external outgoing line is connected with the internal outgoing line, the other end of the external outgoing line is arranged around a consumption medium and used for being connected with a power supply, and the consumption medium is used for consuming electromagnetic waves led out along the external outgoing line.

Further, the cavity of the shield case includes: the first cavity that is close to the punching electric capacity subassembly and the second cavity of keeping away from the punching electric capacity subassembly, first cavity and second cavity are based on the through position division of cathode terminal, and air core coil sets up in first cavity.

Further, the cathode terminal includes a first cathode terminal and a second cathode terminal, which are respectively connected to both ends of the cathode. The internal lead wire comprises a first lead wire and a second lead wire, one end of the first lead wire is connected with the other end of the first cathode terminal, and one end of the second lead wire is connected with the other end of the second cathode terminal.

Further, the air-core coil comprises a first coil and a second coil, wherein one end of the first coil is connected with the first cathode terminal, and one end of the second coil is connected with the second cathode terminal. One end of the first outgoing line is connected with the other end of the first coil, and one end of the second outgoing line is connected with the other end of the second coil.

Furthermore, the feedthrough capacitor assembly further comprises an inner housing arranged in the shielding box to form a first accommodating cavity. And the outer shell is arranged outside the shielding box to form a second accommodating cavity. The first outgoing line and the second outgoing line are led out from the inner case. The external outlet includes a third outlet and a fourth outlet. The third outgoing line and the fourth outgoing line are led out from the outer shell. The third outgoing line is connected with the other end of the first outgoing line, and the fourth outgoing line is connected with the other end of the second outgoing line. The other end of the third outgoing line and the other end of the fourth outgoing line are combined and wound around the consumption medium. And one end of the first capacitor is connected with the third outgoing line, and the other end of the first capacitor is grounded. And one end of the second capacitor is connected with the fourth outgoing line, and the other end of the second capacitor is grounded.

Further, at least part of the first coil and the second coil are embedded in the inner shell.

Further, the length of the internal lead-out wire is 5-10 mm.

Further, the dissipative medium is ferrite or amorphous magnet.

Further, an insulating material is placed inside the shield case.

Further, a material that absorbs electromagnetic waves is added to the insulating material.

In order to solve the above technical problems, the present application provides a magnetron including a magnetron main body, a magnetron filter assembly disposed on the magnetron main body for consuming electromagnetic waves transmitted from the magnetron main body, and the magnetron filter assembly as above.

In order to solve the above technical problem, the present application proposes a household appliance comprising a magnetron, which is provided as the magnetron according to the above technical solution.

Be different from prior art, this application scheme replaces choke coil with hollow coil, can alleviate the technology degree of difficulty on the one hand (choke coil have the coil turn-to-turn of magnetic core section and hollow section specifically different), and on the other hand, through the outside leading-out wire that makes the punching capacitor subassembly outside shielding box around consuming the medium setting, can make consuming the medium consume partly along the electromagnetic wave that outside leading-out wire was drawn forth to alleviate hollow coil and punching capacitor subassembly filtering burden, and then can correspondingly reduce shielding box's volume.

Drawings

In order to more clearly illustrate the technical solutions of the present application, the drawings that are needed in the description will be briefly introduced below, it is obvious that the drawings in the following description are only some of the present application, and other drawings can be obtained by those skilled in the art without inventive efforts.

FIG. 1 is a schematic diagram of a prior art magnetron filter assembly;

FIG. 2 is a schematic structural diagram of an embodiment of a magnetron filtering assembly provided herein;

FIG. 3 is a schematic diagram of a shield box partition of a magnetron filter assembly according to an embodiment of the present application;

FIG. 4 is a schematic structural diagram of an embodiment of a magnetron provided herein;

fig. 5 is a schematic structural diagram of an embodiment of a household appliance provided by the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be further noted that, for the convenience of description, only some of the structures related to the present application are shown in the drawings, not all of the structures. 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 application.

The terms "first", "second", etc. in this application are used to distinguish between different objects and not to describe a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

In the technical field of magnetrons, electromagnetic waves generated by an emission cavity of a magnetron are mainly required fundamental waves (2450MHz) and also electromagnetic waves of other frequencies (including a second high-frequency harmonic (4900MHz), a third high-frequency harmonic (7350MHz), a fourth high-frequency harmonic (9.8GHz), a fifth high-frequency harmonic (12.5GHz) and the like), one part enters a designated working area such as a cooking chamber of a microwave oven through an antenna, and the other part leaks outwards along the directions of a central lead and a side lead entering the emission cavity to generate electromagnetic wave interference on surrounding devices to become disturbance waves. In order to reduce the external leakage of the disturbance waves along the direction of the central lead and the side lead, in the related technology, the central lead and the side lead pass through the shielding cavity and then enter the transmitting cavity, the shielding cavity adopts a choke coil and a feedthrough capacitor to form a resonance system, and the disturbance waves introduced from the transmitting cavity can be partially eliminated by utilizing a shielding shell of the shielding cavity.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a magnetron filtering assembly in the prior art. As shown in fig. 1, the conventional magnetron filter assembly 100 includes a choke coil 10, a feedthrough capacitor 20, and a shield case 30.

The magnetron filtering assembly 100 is disposed on a magnetron main body, the magnetron main body includes a cathode terminal 1 and a cathode, the cathode terminal 1 is led out from the magnetron main body and penetrates the bottom of the shielding box 30, and one end of the cathode terminal 1 is connected to the cathode. The cathode terminal 1 penetrates the bottom of the shield case 20, and the other end is disposed in the receiving cavity of the shield case 30.

The choke coil 10 is disposed in the shield case 30 and includes a magnetic core section and a hollow core section, and one end of the choke coil 10 is connected to the cathode terminal 1. The feedthrough capacitor 20 is provided through a side wall of the shield case 30, and a lead line of the feedthrough capacitor 20 is connected to the other end of the choke coil 10. Therefore, the circuit structure formed by the feedthrough capacitor 20 and the choke coil 10 filters the electromagnetic wave emitted from the magnetron.

The inventor of the present application has found that, in some applications of a household appliance (such as an induction cooker), the space occupancy rate of the inner cavity of the household appliance is small due to the large volume of the magnetron, and the large volume of the shielding box 30 is an important reason for the difficulty in reducing the volume of the magnetron.

Based on this, the magnetron filtering component proposed by the inventor of the present application changes the choke coil into an air core coil, and additionally includes a dissipative medium. Because the consumption medium can consume a certain amount of electromagnetic waves, the length of the air-core coil can be properly reduced to a certain extent, the volume of the shielding box can be further reduced, and the purpose of reducing the volume of the magnetron is finally achieved.

Referring to fig. 2, fig. 2 is a schematic structural diagram of an embodiment of a magnetron filtering assembly provided in the present application, and as shown in fig. 2, the magnetron filtering assembly 200 provided in the present embodiment includes a shielding box 210, an air-core coil 220, and a feedthrough capacitor assembly 230.

Among them, the shield case 210 includes a first sidewall 211, a second sidewall 212, a third sidewall 213, and a fourth sidewall 214.

The cathode terminal 1 of the magnetron is penetratingly disposed at the bottom of the shield case 210, and one end of the cathode terminal 1 is connected to the cathode of the magnetron.

The air-core coil 220 is disposed in the shield case 210, and one end of the air-core coil 220 is connected to the other end of the cathode terminal 1.

The feedthrough capacitor assembly 230 is disposed through a sidewall of the shielding box 210, and a portion of the feedthrough capacitor assembly 230 is disposed in the receiving cavity of the shielding box 210. Specifically, the feedthrough capacitor assembly 230 is disposed through the first sidewall 211 of the shielding box 210, and at this time, a distance between the first sidewall 211 and the third sidewall 213 is L, and a distance between the second sidewall 212 and the fourth sidewall 214 is M. The feedthrough capacitor assembly 230 includes internal leads 231 leading into the shield can 210, the internal leads 231 connecting the other end of the air core coil 220.

The feedthrough capacitor assembly 230 includes an external lead 232 led out to the outside of the shield case 210, one end of the external lead 232 is connected to the internal lead 231, the other end of the external lead 232 is disposed around the consuming medium 240 and used for connecting a power supply, and the consuming medium 240 is used for consuming electromagnetic waves led out along the external lead 232.

Alternatively, the dissipative medium 240 of the present embodiment may be made of a material with high insulation, high magnetic permeability, and large magnetic loss. For example, the dielectric medium 240 may be a ferrite material composed of a NiCuZn-based ferrite material containing predetermined amounts of iron oxide, copper oxide, zinc oxide, and nickel oxide as a main component and bismuth oxide, silicon oxide, magnesium oxide, and cobalt oxide as auxiliary components. Of course, the consumable medium 240 may be made of amorphous magnet or graphite, and is not limited herein.

The working principle of the magnetron filter assembly 200 provided by this embodiment is that the cathode terminal 1 of the magnetron introduces the electromagnetic wave generated by the cathode from the emission cavity into the shielding box 210, a part of the electromagnetic wave is filtered by the feedthrough capacitor assembly 230 inside the shielding box 210, and the electromagnetic wave led out from the external lead 232 can be consumed by the consumption medium 240 wound and connected with the external lead 232 of the feedthrough capacitor assembly 230 outside the shielding box 210.

In this embodiment, the power supply can supply power for the whole magnetron through the external lead 232 of the feedthrough capacitor assembly 230, and the frequency of the power supply can be typically 20kHz to 40 kHz.

Specifically, the cathode terminal 1 of the magnetron includes a first cathode terminal 11 and a second cathode terminal 12, and the first cathode terminal 11 and the second cathode terminal 12 are connected to both ends of the cathode of the magnetron, respectively.

Air core coil 220 may include a first coil 221 and a second coil 222, with one end of first coil 221 connected to first cathode terminal 11 and one end of second coil 222 connected to second cathode terminal 12.

The internal lead line 231 may include a first lead line 2311 and a second lead line 2312, one end of the first lead line 2311 being connected to the other end of the first coil 221, and one end of the second lead line 2312 being connected to the other end of the second coil 222.

Feedthrough capacitor assembly 230 further includes an inner housing 233 and an outer housing 234.

The inner housing 233 is disposed in the shielding box 210 to form a first accommodating chamber (not shown). The outer housing 234 is disposed outside the shielding box 210 to form a second accommodating chamber (not shown). A first outgoing line 2311 and a second outgoing line 2312 are led out from the inner case 233. The external pinouts 232 include a third pinout 2321 and a fourth pinout 2322. A third outlet 2321 and a fourth outlet 2322 lead from the outer housing 234. The third lead line 2321 is connected to the other end of the first lead line 2311, and the fourth lead line 2322 is connected to the other end of the second lead line 2312. The other end of the third outlet 2321 and the other end of the fourth outlet 2322 are merged and arranged around the consuming medium 240.

Optionally, in order to further reduce the volume of the shielding box 210, the present embodiment may further embed at least part of the first coil 221 and the second coil 222 in the inner housing 233, where at least part of the first coil 221 and the second coil 222 is located in the first accommodating cavity. In a specific application scenario, the embedding depth of the first coil 221 and the second coil 222 may be determined according to the size of the first accommodating cavity, the first coil 221, and the second coil 222, for example, if the first accommodating cavity is large enough, the first coil 221 and the second coil 222 can be completely embedded in the first accommodating cavity, or the first accommodating cavity can only wrap half of the size of the first coil 221 and the second coil 222, and so on.

It is understood that this arrangement can effectively utilize the first receiving cavity formed by the inner housing 233, that is, at least a portion of the first coil 221 and the second coil 222 is embedded in the first receiving cavity, and in this way, the volume of the shielding box 210 and thus the volume of the magnetron filter assembly 200 can be further reduced.

Alternatively, the dissipative medium 240 may be in a ring shape, the third outgoing line 2321 and the fourth outgoing line 2322 are disposed around the dissipative medium 240 in the same direction to form a common mode inductor, and the number of turns of the winding may be set according to actual requirements, such as 4 turns, 5 turns, 6 turns, and the like. The material of the consumable medium 240 in this embodiment is not particularly limited as long as it can consume electromagnetic waves.

The feedthrough capacitor assembly 230 may further include a first capacitor (not shown) and a second capacitor (not shown), one end of the first capacitor is connected to the third lead-out line 2321, and the other end of the first capacitor is grounded. One end of the second capacitor is connected to the fourth outgoing line 2322, and the other end of the second capacitor is grounded. In order to improve the EMI performance (Electro Magnetic Compatibility) of the magnetron and to consider the operating environment of the magnetron, the first capacitor and the second capacitor in this embodiment may be selected to have high capacitance and high withstand voltage strength. In this way, it is possible to reduce the leakage of electromagnetic waves outward in the direction of the first and second cathode terminals 11 and 12. In practical applications, the magnetron filter assembly 200 can filter out electromagnetic waves emitted from the central lead and the side leads of the magnetron emission cavity.

In this embodiment, the whole magnetron filter assembly 200 utilizes the LCL resonant circuit formed by disposing the air-core coil 220, the feedthrough capacitor assembly 230, and the external lead 232 around the consumption medium 240 to suppress and consume the high-frequency electromagnetic waves generated by the magnetron, compared with the conventional scheme, in this embodiment, the air-core coil 220 is used to replace the choke coil, which can reduce the process difficulty (the coil turns of the choke coil having the magnetic core section are different from those of the hollow core section), and on the other hand, the external lead 232 of the feedthrough capacitor assembly 230 is disposed around the consumption medium 240 outside the shielding box 210, so that the consumption medium 240 consumes a part of the electromagnetic waves led out along the external lead 232, thereby reducing the filtering burden of the air-core coil 220 and the feedthrough capacitor assembly 230, and further reducing the volume of the shielding box 210 accordingly.

Alternatively, in the case where certain filtering conditions are satisfied, the present embodiment may reduce the volume of the shield case 210 by making the space occupancy of the air-core coil 220 and the feedthrough capacitor assembly 230 in the shield case 210 as small as possible.

In one embodiment, the filtering burden of the air-core coil 220 and the feedthrough capacitor assembly 230 can be reduced by increasing the filtering burden of the dissipative medium 240 outside the shielding box 210, so that the corresponding structural parameters of the air-core coil 220 can be changed, the space occupation ratio of the air-core coil 220 and the feedthrough capacitor assembly 230 can be reduced, and the volume of the shielding box 210 can be reduced.

For example, the filtering load of the dielectric medium 240 outside the shield case 210 is increased by selecting the dielectric medium 240 having a large ability to absorb electromagnetic waves, by decreasing the turn-to-turn distance of the dielectric medium 240 around which the external lead 232 is wound, or by increasing the number of turns of the dielectric medium 240 around which the external lead 232 is wound.

In another embodiment, the reduction of the volume of the shield can 210 may be achieved by directly limiting the spatial extent of the air-core coil 220 within the shield can 210.

Referring to fig. 3, fig. 3 is a schematic structural diagram of a shield case 210 of a magnetron filter assembly according to the present application. As shown in fig. 3, the cavity in the shielding box 210 is divided into a first cavity a and a second cavity B based on the penetrating position of the cathode terminal 1 in the shielding box 210, wherein the first cavity a is close to the feedthrough capacitor assembly 230, the second cavity B is far from the feedthrough capacitor assembly 230, and the air-core coil 220 is disposed in the first cavity a.

Specifically, a plane Z may be formed at a position where the cathode terminal 1 penetrates the shield case 210, and the plane Z is parallel to the first sidewall 211, so that the cavity in the shield case 210 is divided into a first cavity a and a second cavity B, and the air-core coil 220 is disposed in the first cavity a. It is understood that the dividing manner of the shielding box 210 may be other manners meeting the requirement, and fig. 3 is one of the manners, and the embodiment is not limited to this.

In this embodiment, after the shielding box 210 is divided into the first cavity a and the second cavity B, the air-core coil 220 is disposed in the first cavity a of the shielding box 210, and the volume of the shielding box 210 can be further reduced by, for example, reducing the volume of the second cavity B.

In another embodiment, the volume of the shield can 210 may also be reduced by shortening the length of the internal lead wires 231 of the feedthrough capacitor assembly 230. Specifically, the length of the internal lead wire 231 of the conventional feedthrough capacitor assembly 230 is usually about 25mm, and the excessive length of the internal lead wire 231 directly results in the increase in the volume of the shield case 210. Therefore, in the present embodiment, the length of the internal lead line 231 of the feedthrough capacitor assembly 230 led into the shield case 210 may be 5 to 10 mm. This length is reduced relative to the length of the existing lead-out wires and does not allow the air core coil 220 connected to the internal lead-out wires 231 to be excessively close to the inner wall of the shield case 210. In this way, the volume of the shield can 210 can be directly reduced.

Due to the working characteristics of the magnetron itself, during normal operation, the magnetron filter assembly 200 is connected with a negative high voltage, and in order to prevent the phenomenon of discharge and ignition between the air-core coil 220 and the shielding box 210, the relative distance between the air-core coil 220 and the shielding box 210 needs to be ensured during design. In the prior art, air is used as an insulating medium to avoid the phenomenon of point discharge, and the air is used as the insulating medium, so that the shielding box 210 is inevitably oversized, the overall size of the magnetron is increased, and the household appliances such as a microwave oven and the like are huge in size and small in effective use area. In addition, because the structure uses air as a medium, when the air is humid, the withstand voltage test may not pass, so that the tester can make a misjudgment on the safety performance of the product.

Optionally, an insulating material (not shown) may be disposed in the shielding box 210 in this embodiment, and the insulating material may be a solid insulating material, a liquid insulating material, a gaseous insulating material, or the like. For example, if the insulating material is in a gaseous state, such as sulfur hexafluoride, the insulating gas may be uniformly filled in the shield case 210. If the insulating material is solid or liquid, the insulating material may be used to wrap the air-core coil 220 inside the shielding box 210 or to coat the inner wall of the shielding box 210.

Common liquid insulating materials are natural mineral oils, natural vegetable oils, synthetic oils, and the like, and common solid insulating materials are insulating paints, insulating glues, fiber products, rubbers, plastics and products thereof, glass, ceramic products, mica, asbestos and products thereof, and the like.

Preferably, a material absorbing electromagnetic waves, such as graphite, ferrite, or the like, is added to the insulating material.

In this way, the medium within the shield case 210 that consumes electromagnetic waves can be increased. In other words, not only the LCL resonant circuit formed by the air-core coil 220, feedthrough capacitor assembly 230, and external leads 232 disposed around the lossy medium 240 absorbs electromagnetic waves, but some materials in the dielectric material also absorb some of the electromagnetic waves. The filtering burden of the air core coil 220, the feedthrough capacitor assembly 230 and the dissipative medium 240 can be reduced accordingly, so that the volume of the magnetron shield can 210 can be reduced by, for example, reducing the number of turns of the air core coil 220 or reducing the volume of the dissipative medium 240.

In this embodiment, by disposing an insulating material (non-air) in the shielding box 210, the distance between the air-core coil 220 and the inner wall of the shielding box 210 can be reduced while the phenomenon of discharge and ignition between the air-core coil 220 and the shielding box 210 is prevented, so as to reduce the volume of the shielding box 210, and finally achieve the purpose of reducing the volume of the magnetron.

In summary, the choke coil is replaced by the air-core coil 220 in the scheme of the present application, on one hand, the process difficulty (the coil turns of the choke coil having the magnetic core section are different from those of the hollow core section) can be reduced, and on the other hand, by arranging the external outgoing line 232 of the feedthrough capacitor assembly 230 outside the shielding box 210 around the consuming medium 240, a part of the electromagnetic waves led out along the external outgoing line 232 can be consumed by the consuming medium 240, so that the filtering burden of the air-core coil 220 and the feedthrough capacitor assembly 230 is reduced, and further, the number of turns of the air-core coil 220 can be correspondingly reduced, and the volume of the shielding box 210 can be reduced.

Referring to fig. 4, fig. 4 is a schematic structural diagram of an embodiment of a magnetron provided by the present application. The magnetron 400 includes a magnetron body 401 and a magnetron filter assembly 402. Wherein, the magnetron filtering component 402 is disposed on the magnetron main body 401 for consuming the electromagnetic wave transmitted from the magnetron main body 401, and the magnetron filtering component 402 is the magnetron filtering component provided in any of the above embodiments. Above-mentioned magnetron filtering subassembly 402 replaces choke coil with air core coil, can alleviate the technology degree of difficulty on the one hand (choke coil have the specific difference in coil turn-to-turn of magnetic core section and hollow core section), and on the other hand, through make the outside lead-out wire of punching electric capacity subassembly around consuming the medium setting outside shielding box, can make consuming the medium consume a part along the electromagnetic wave of outside lead-out wire extraction to alleviate air core coil and punching electric capacity subassembly filtering burden, and then can correspondingly reduce the number of turns of air core coil, reduce shielding box's volume.

Referring to fig. 5, fig. 5 is a schematic structural diagram of an embodiment of a household appliance provided in the present application. The household appliance 500 comprises a magnetron 501. In the magnetron 501 according to the above embodiment, since the magnetron filtering assembly according to any of the above embodiments exists in the magnetron 501 according to the above embodiments, the volume of the household appliance 500 is reduced due to the reduction of the volume of the magnetron filtering assembly.

In some embodiments, the household appliance 500 may be a microwave oven.

In conclusion, according to the scheme of the application, the choke coil is replaced by the hollow coil, so that on one hand, the process difficulty (the coil turns of the choke coil are different from those of the hollow coil), on the other hand, the external lead wire of the feedthrough capacitor assembly is wound around the consumption medium outside the shielding box, so that a part of electromagnetic waves led out along the external lead wire can be consumed by the consumption medium, the filtering burden of the hollow coil and the feedthrough capacitor assembly is reduced, the number of turns of the hollow coil can be correspondingly reduced, and the size of the shielding box is reduced.

It is to be understood that the particulars described herein are by way of illustration and not by way of limitation. In addition, for convenience of description, only a part of structures related to the present application, not all of the structures, are shown in the drawings. All others that would be obvious to one of ordinary skill in the art based on this disclosure, without any creative effort, are within the scope of this disclosure.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one of the present applications. The appearances of the phrase in various places in the specification are not necessarily all referring to the same, nor are separate or alternative meanings mutually exclusive of others. Those skilled in the art will explicitly and implicitly appreciate that what is described herein may be combined with others.

The above embodiments are merely examples and are not intended to limit the scope of the present disclosure, and all modifications, equivalents, and flow charts using the contents of the specification and drawings of the present disclosure or those directly or indirectly applied to other related technical fields are intended to be included in the scope of the present disclosure.

Claims

1. A magnetron filter assembly, comprising:

the cathode terminal of the magnetron penetrates through the bottom of the shielding box, and one end of the cathode terminal is connected with the cathode of the magnetron;

the hollow coil is arranged in the shielding box, and one end of the hollow coil is connected with the other end of the cathode wiring terminal;

the feedthrough capacitor assembly penetrates through the side wall of the shielding box and comprises an internal outgoing line led out into the shielding box, and the internal outgoing line is connected with the other end of the hollow coil;

the feedthrough capacitor assembly comprises an external outgoing line led out from the shielding box, one end of the external outgoing line is connected with the internal outgoing line, the other end of the external outgoing line is arranged around a consumption medium and used for being connected with a power supply, and the consumption medium is used for consuming electromagnetic waves led out along the external outgoing line.

2. The magnetron filtering assembly of claim 1,

the cavity of the shielding box comprises: the first cavity is close to the feedthrough capacitor assembly, the second cavity is far away from the feedthrough capacitor assembly, the first cavity and the second cavity are divided based on the penetrating position of the cathode terminal, and the air-core coil is arranged in the first cavity.

3. The magnetron filtering assembly of claim 1,

the cathode terminal comprises a first cathode terminal and a second cathode terminal, and the first cathode terminal and the second cathode terminal are respectively connected with two ends of the cathode;

the internal lead wire comprises a first lead wire and a second lead wire, one end of the first lead wire is connected with the other end of the first cathode terminal, and one end of the second lead wire is connected with the other end of the second cathode terminal.

4. The magnetron filtering assembly of claim 3,

the air-core coil comprises a first coil and a second coil, one end of the first coil is connected with the first cathode terminal, and one end of the second coil is connected with the second cathode terminal;

one end of the first outgoing line is connected with the other end of the first coil, and one end of the second outgoing line is connected with the other end of the second coil.

5. The magnetron filtering assembly of claim 3,

the feedthrough capacitor assembly further comprises:

the inner shell is arranged in the shielding box to form a first accommodating cavity;

the outer shell is arranged outside the shielding box and forms a second accommodating cavity;

the first outgoing line and the second outgoing line are led out from the inner case;

the external outgoing lines comprise a third outgoing line and a fourth outgoing line;

the third outgoing line and the fourth outgoing line are led out of the outer shell;

the third outgoing line is connected with the other end of the first outgoing line, and the fourth outgoing line is connected with the other end of the second outgoing line;

the other end of the third outgoing line and the other end of the fourth outgoing line are combined and arranged around the consumption medium;

one end of the first capacitor is connected with the third outgoing line, and the other end of the first capacitor is grounded;

and one end of the second capacitor is connected with the fourth outgoing line, and the other end of the second capacitor is grounded.

6. The magnetron filtering assembly of claim 5,

at least a portion of the first coil and the second coil are embedded within the inner housing.

7. Magnetron filter assembly as claimed in any one of the claims 1 to 6,

the length of the internal outgoing line is 5-10 mm.

8. Magnetron filter assembly as claimed in any one of the claims 1 to 6,

the dissipative medium is ferrite or amorphous magnet.

9. Magnetron filter assembly as claimed in any one of the claims 1 to 6,

insulating materials are placed in the shielding box.

10. The shielding device filter assembly of claim 9,

a material for absorbing the electromagnetic wave is added to the insulating material.

11. A magnetron, comprising:

a magnetron main body having a plurality of magnetron bodies,

a magnetron filter assembly disposed on the magnetron body for dissipating electromagnetic waves propagating in the magnetron body, the magnetron filter assembly as claimed in any one of claims 1 to 10.

12. A household appliance comprising a magnetron according to claim 11.