阅读说明：本技术 磁控管滤波组件、磁控管以及家用电器 (Magnetron filtering component, magnetron and household appliance ) 是由 胡建 罗良敏 朱军 唐相伟 施志雄 王贤友 郭海洋 张昀 于 2020-12-30 设计创作，主要内容包括：本申请涉及磁控管技术领域,公开了磁控管滤波组件、磁控管以及家用电器。该磁控管滤波组件包括：屏蔽盒、穿心电容组件、第一消耗介质和第二消耗介质。其中,磁控管的阴极接线端贯穿设置于屏蔽盒的底部；穿心电容组件贯穿设置于屏蔽盒的侧壁,穿心电容组件包括向屏蔽盒内引出的引出线、以及向屏蔽盒外引出的阴极线,引出线连接阴极接线端,阴极线一端连接引出线；第一消耗介质套设于阴极接线端,用于消耗沿阴极接线端的电磁波,或第一消耗介质套设于引出线,用于消耗沿引出线的电磁波；阴极线绕第二消耗介质设置,并用于连接电源,第二消耗介质用于消耗沿阴极线的电磁波。通过上述方式,减小磁控管的体积。(The application relates to the technical field of magnetrons and discloses a magnetron filtering component, a magnetron and a household appliance. The magnetron filtering assembly includes: the device comprises a shielding box, a feedthrough capacitor assembly, a first consumable medium and a second consumable medium. Wherein, the cathode terminal of the magnetron is arranged at the bottom of the shielding box in a penetrating way; the feedthrough capacitor assembly penetrates through the side wall of the shielding box and comprises a lead-out wire led out into the shielding box and a cathode wire led out of the shielding box, the lead-out wire is connected with a cathode wiring terminal, and one end of the cathode wire is connected with the lead-out wire; the first consumption medium is sleeved on the cathode terminal and used for consuming the electromagnetic waves along the cathode terminal, or the first consumption medium is sleeved on the outgoing line and used for consuming the electromagnetic waves along the outgoing line; the cathode wire is disposed around a second dissipative medium for connection to a power source, the second dissipative medium for dissipating electromagnetic waves along the cathode wire. In this way, the volume of the magnetron is reduced.)

1. A magnetron filter assembly, comprising:

the magnetron comprises a shielding box, a cathode terminal of a 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 feedthrough capacitor assembly penetrates through the side wall of the shielding box and comprises a lead-out wire led out into the shielding box and a cathode wire led out of the shielding box, one end of the lead-out wire is connected with the cathode wiring terminal, and the other end of the lead-out wire is connected with the cathode wire;

the first consumption medium is sleeved on the cathode terminal and used for consuming the electromagnetic waves along the cathode terminal, or the first consumption medium is sleeved on the outgoing line and used for consuming the electromagnetic waves along the outgoing line;

a second consumable medium, the cathode wire disposed around the second consumable medium and configured to be connected to a power source, the second consumable medium configured to consume electromagnetic waves along the cathode wire.

2. 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 lead-out wire includes first lead-out wire and second lead-out wire, the one end of first lead-out wire is connected first cathode terminal, the one end of second lead-out wire is connected second cathode terminal.

3. The magnetron filtering assembly of claim 2,

the first consumption medium is provided with a first through hole and a second through hole; the first outgoing line penetrates through the first through hole, and the second outgoing line penetrates through the second through hole.

4. The magnetron filtering assembly of claim 3,

the cathode lines comprise a first cathode line and a second cathode line, one end of the first cathode line is connected with the other end of the first outgoing line, and one end of the second cathode line is connected with the other end of the second outgoing line;

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;

one end of the first capacitor is connected with the other end of the first cathode wire, and the other end of the first capacitor is grounded;

and one end of the second capacitor is connected with the other end of the second cathode wire, and the other end of the second capacitor is grounded.

5. The magnetron filtering assembly of claim 4,

the first consumption medium is sleeved on the outgoing line, and at least part of the first consumption medium is embedded in the inner shell.

6. The magnetron filtering assembly of claim 2,

the first consumption medium is sleeved on the cathode terminal and provided with a third through hole and a fourth through hole, the first cathode terminal penetrates through the third through hole, and the second cathode terminal penetrates through the fourth through hole.

7. The magnetron filtering assembly of claim 1,

the first consumable dielectric sleeve is disposed on the cathode terminal, and the magnetron filtering assembly further includes:

and the third consumption medium is sleeved on the outgoing line and used for consuming the electromagnetic waves along the outgoing line.

8. The magnetron filtering assembly of claim 1,

the first consumption medium is sleeved on an insulation support column of the magnetron, the insulation support column is sleeved on the cathode terminal, and the first consumption medium is used for consuming electromagnetic waves along the cathode terminal.

9. 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 8.

10. A household appliance comprising a magnetron according to claim 9.

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 technical problem that this application mainly solved provides magnetron filtering subassembly, magnetron and domestic appliance, can reduce the volume of magnetron.

A technical solution adopted by the present application is to provide a magnetron filtering 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; the feedthrough capacitor assembly penetrates through the side wall of the shielding box and comprises a lead-out wire led out into the shielding box and a cathode wire led out of the shielding box, the lead-out wire is connected with a cathode wiring terminal, and one end of the cathode wire is connected with the lead-out wire; the first consumption medium is sleeved on the cathode terminal and used for consuming the electromagnetic waves along the cathode terminal, or the first consumption medium is sleeved on the outgoing line and used for consuming the electromagnetic waves along the outgoing line; and a second consumable medium, the cathode wire being disposed around the second consumable medium and being for connection to a power source, the second consumable medium being for consuming electromagnetic waves along the cathode wire.

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 lead-out wire includes first lead-out wire and second lead-out wire, and first cathode connection end is connected to the one end of first lead-out wire, and the second cathode connection end is connected to the one end of second lead-out wire.

The first consumption medium is provided with a first through hole and a second through hole; the first outgoing line penetrates through the first through hole, and the second outgoing line penetrates through the second through hole.

The cathode lines comprise a first cathode line and a second cathode line, one end of the first cathode line is connected with the other end of the first outgoing line, and one end of the second cathode line is connected with the other end of the second outgoing line; 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; one end of the first capacitor is connected with the other end of the first cathode wire, and the other end of the first capacitor is grounded; and one end of the second capacitor is connected with the other end of the second cathode wire, and the other end of the second capacitor is grounded.

The first consumption medium is sleeved on the outgoing line, and at least part of the first consumption medium is embedded in the inner shell.

The first consumption medium is sleeved on the cathode terminal, the first consumption medium is provided with a third through hole and a fourth through hole, the first cathode terminal penetrates through the third through hole, and the second cathode terminal penetrates through the fourth through hole.

Wherein, the cathode terminal is located to first consumption medium cover, and magnetron filtering subassembly still includes: and the third consumption medium is sleeved on the outgoing line and used for consuming the electromagnetic waves along the outgoing line.

The first consumption medium is sleeved on an insulation support column of the magnetron, the insulation support column is sleeved on the cathode terminal, and the first consumption medium is used for consuming electromagnetic waves along the cathode terminal.

Wherein the first consumable medium and/or the second consumable medium is ferrite or amorphous magnet.

Another technical solution adopted by the present application is to provide a magnetron including: the magnetron filtering device comprises a magnetron main body and a magnetron filtering component, wherein the magnetron filtering component is arranged on the magnetron main body and used for consuming electromagnetic waves transmitted from the magnetron main body, and the magnetron filtering component is provided according to the technical scheme.

Another technical solution adopted by the present application is to provide a household appliance including a magnetron, the magnetron being as provided in the above technical solution.

The beneficial effect of this application is: in contrast to the state of the art, a magnetron filter assembly of the present application 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; the feedthrough capacitor assembly penetrates through the side wall of the shielding box and comprises a lead-out wire led out into the shielding box and a cathode wire led out of the shielding box, the lead-out wire is connected with a cathode wiring terminal, and one end of the cathode wire is connected with the lead-out wire; the first consumption medium is sleeved on the cathode terminal and used for consuming the electromagnetic waves along the cathode terminal, or the first consumption medium is sleeved on the outgoing line and used for consuming the electromagnetic waves along the outgoing line; and a second consumable medium, the cathode wire being disposed around the second consumable medium and being for connection to a power source, the second consumable medium being for consuming electromagnetic waves along the cathode wire. Through the mode, the high-frequency electromagnetic waves generated by the magnetron can be inhibited and consumed by utilizing the LCL resonant circuit formed by sleeving the first consumption medium on the cathode terminal or the outgoing line, the feedthrough capacitor assembly and the cathode line around the second consumption medium, so that the filtering can be realized without arranging a coil in the magnetron filtering assembly, and the problem that the distance between the coil and the shielding box must be ensured because the phenomenon of discharge and ignition can occur between the coil and the shielding box is not considered when the volume of the shielding box is arranged, thereby reducing the volume of the shielding box and finally reducing the volume of the magnetron.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. Wherein:

FIG. 1 is a schematic structural diagram of an embodiment of a magnetron filter assembly provided herein;

FIG. 2 is a schematic structural diagram of another embodiment of a magnetron filtering assembly provided by the present application;

FIG. 3 is a schematic structural diagram of an embodiment of a first consumable medium provided herein;

FIG. 4 is a schematic structural diagram of another embodiment of a magnetron filtering assembly provided by the present application;

FIG. 5 is a schematic structural diagram of another embodiment of a magnetron filtering assembly provided by the present application;

FIG. 6 is a schematic structural diagram of another embodiment of a magnetron filtering assembly provided by the present application;

FIG. 7 is a schematic structural diagram of another embodiment of a magnetron filtering assembly provided by the present application;

FIG. 8 is a schematic structural diagram of an embodiment of a magnetron provided herein;

fig. 9 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.

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 embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

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 an embodiment of a magnetron filtering assembly provided in the present application. As shown in fig. 1, the magnetron filter assembly 10 includes a shield case 11, a choke coil 12, and a feedthrough capacitor 13. Wherein, a choke coil 12 is provided in the shield case 11, and one end of the choke coil 12 is connected to a cathode terminal 14 of the magnetron. The feedthrough capacitor 13 is provided through a side wall of the shield case 11, and a lead wire of the feedthrough capacitor 13 is connected to the other end of the choke coil 12. Therefore, the circuit structure formed by the feedthrough capacitor 13 and the choke coil 12 filters the electromagnetic wave emitted from the magnetron.

As shown in fig. 1, the shield case 11 includes a first sidewall 111, a second sidewall 112, a third sidewall 113, and a fourth sidewall 114. The feedthrough capacitor 13 penetrates the first sidewall 111 of the shield case 11, where a distance between the first sidewall 111 and the third sidewall 113 is L, and a distance between the second sidewall 112 and the fourth sidewall 114 is M.

In the application of some household appliances (such as microwave ovens), the space occupancy rate of the inner cavity of the household appliance is small due to the overlarge volume of the magnetron, and the overlarge volume of the shielding box body is an important reason for the difficulty in reducing the volume of the magnetron. Based on this, the following examples are proposed:

referring to fig. 2, fig. 2 is a schematic structural diagram of another embodiment of a magnetron filtering component provided in the present application. The magnetron filter assembly 20 includes a shield case 21, a feedthrough capacitor assembly 22, a first dissipative medium 23 and a second dissipative medium 24.

Inside the shielding box 21 is a receiving cavity for receiving a part of the feedthrough capacitor assembly 22 and the first consumable medium 23.

The magnetron filter assembly 20 is disposed on a magnetron body including a cathode terminal 25 and a cathode, the cathode terminal 25 is led out from the magnetron body and penetratingly disposed at the bottom of the shield case 21, and one end of the cathode terminal 25 is connected to the cathode. The cathode terminal 25 penetrates the bottom of the shield case 21, and the other end is disposed in the accommodation chamber of the shield case 21.

The feedthrough capacitor assembly 22 is disposed through a sidewall of the shielding box 21, and a part of the feedthrough capacitor assembly 22 is disposed in the accommodating cavity of the shielding box 21. The feedthrough capacitor assembly 22 includes a lead 221 led out of the shield case 21 and a cathode line 222 led out of the shield case 21, the lead 221 is connected to the cathode terminal 25, and one end of the cathode line 222 is connected to the lead 221. As shown in fig. 2, the shield case 21 includes a first sidewall 211, a second sidewall 212, a third sidewall 213, and a fourth sidewall 214. The feedthrough capacitor assembly 22 is disposed through the first sidewall 211 of the shielding box 21, where a distance between the first sidewall 211 and the third sidewall 213 is N, and a distance between the second sidewall 212 and the fourth sidewall 214 is O.

The first consuming medium 23 is sleeved on the outgoing line 221 and is used for consuming the electromagnetic waves along the outgoing line 221. Specifically, the cathode terminal 25 includes a first cathode terminal 251 and a second cathode terminal 252, and the first cathode terminal 251 and the second cathode terminal 252 are respectively connected to both ends of the cathode of the magnetron. Lead line 221 includes a first lead line 2211 and a second lead line 2212, one end of first lead line 2211 being connected to first cathode terminal 251, and one end of second lead line 2212 being connected to second cathode terminal 252. Because the lead-out wire 221 is directly connected with the cathode terminal 25, the coil originally connected with the cathode terminal 25 and the lead-out wire 221 is abandoned, and the space occupied by the coil in the shielding box 21 is released, so that when the volume of the shielding box 21 is set, the problem that the distance between the coil and the shielding box 21 must be ensured because the phenomenon of discharge and ignition can occur between the coil and the shielding box 21 is not considered, and the volume of the shielding box 21 can be reduced.

Specifically, referring to fig. 3, the first consumable medium 23 is provided with a first through hole 231 and a second through hole 232, the first lead-out wire 2211 is inserted into the first through hole 231, and the second lead-out wire 2212 is inserted into the second through hole 232. At this time, the first and second lead lines 2211 and 2212 and the first dissipative medium 23 form an inductor having both characteristics of a differential mode inductor and a common mode inductor, which can dissipate the electromagnetic waves along the lead line 221 when the magnetron filter assembly 20 is in operation.

The cathode line 222 is disposed around the second dissipative medium 24 and is used to connect to a power source, and the second dissipative medium 24 is used to dissipate electromagnetic waves along the cathode line 222. Wherein the second consumable medium 24 is located outside the shield can 21. Specifically, the cathode line 222 includes a first cathode line 2221 and a second cathode line 2222, one end of the first cathode line 2221 is connected to the other end of the first lead-out line 2211, and one end of the second cathode line 2222 is connected to the other end of the second lead-out line 2212. The second consuming medium 24 may be in a ring shape, the first cathode wire 2221 and the second cathode wire 2222 are wound around the second consuming medium 24 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. In this way, the whole magnetron filter assembly 20 utilizes the LCL resonant circuit formed by the first consumption medium 23, the feedthrough capacitor assembly 22 and the cathode wire 222 sleeved on the outgoing line 221 and arranged around the second consumption medium 24 to suppress and consume the high-frequency electromagnetic waves generated by the magnetron, so that the filtering can be realized without arranging a coil in the magnetron filter assembly 20, and therefore, when the volume of the shielding box 21 is set, the problem that the distance between the coil and the shielding box 21 must be ensured because the phenomenon of discharge and ignition can occur between the coil and the shielding box 21 does not need to be considered, the volume of the shielding box 21 can be reduced, and finally, the volume of the magnetron is reduced.

Alternatively, the first consumable medium 23 and the second consumable medium 24 may be made of ferrite materials, which are composed of NiCuZn-based ferrite materials containing predetermined amounts of iron oxide, copper oxide, zinc oxide, and nickel oxide as main components and bismuth oxide, silicon oxide, magnesium oxide, and cobalt oxide as auxiliary components. The first and second consumable media 23, 24 may also be amorphous magnets. Alternatively, the first expendable medium 23 is ferrite, and the second expendable medium 24 is an amorphous magnet.

In other embodiments, the first consumable medium 23 and the second consumable medium 24 may be insulating materials, high magnetic permeability materials, and large magnetic loss materials of different materials. The first consumable medium 23 and the second consumable medium 24 may be annular or cylindrical, and the shapes of the first consumable medium 23 and the second consumable medium 24 may be adjusted in length and width.

In the case that a certain filtering condition is satisfied, the first dissipative medium 23 and the feedthrough capacitor assembly 22 of the magnetron filtering assembly 20 according to the present embodiment can be set as small as possible in the space occupied by the shield case 21, so that the volume of the shield case 21 can be reduced accordingly. For example, in order to reduce the volume of the shield case 21, the first expendable medium 23 having a large ability to absorb electromagnetic waves may be selected. Accordingly, since the second consumable medium 24 is disposed outside the shield case 21, the second consumable medium 24 having a large ability to absorb electromagnetic waves can be selected to consume more electromagnetic waves, so that the burden on the first consumable medium 23 can be reduced, and the volume of the first consumable medium 23 can be reduced, so that the volume of the shield case 21 can be reduced accordingly.

Description of feedthrough capacitor assembly 22:

feedthrough capacitor assembly 22 further includes: an inner housing 223, an outer housing 224, a first capacitor (not shown), and a second capacitor (not shown). The inner housing 223 is disposed in the shield case 21 to form a first accommodation chamber; the outer housing 224 is disposed outside the shielding box 21 to form a second accommodating chamber; one end of the first capacitor is connected to the other end of the first cathode line 2221, and the other end of the first capacitor is grounded; one end of the second capacitor is connected to the other end of the second cathode line 2222, and the other end of the second capacitor is grounded. In this way, the space occupied by the inner housing 223 in the shielding box 21 is reduced as much as possible to reduce the volume of the shielding box 21. The first consumable medium 23 may be partially embedded in the inner housing 223.

In some embodiments, in order to further reduce the volume of the shield box 21, the outer portion of the first consumable medium 23 is attached to the inner housing 223, the first lead-out line 2211 and the second lead-out line 2212 are attached to the inner sides of the first through hole 231 and the second through hole 232 of the first consumable medium 23, and the first consumable medium 23 is attached to the lead-out line 221 when the volume of the lead-out line 221 is constant, so that the volume of the first consumable medium 23 and thus the volume of the inner housing 223 can be controlled to the maximum extent, thereby reducing the volume of the shield box 21.

In addition, the first consumption medium 23 made of ferrite material is used, and the first consumption medium 23 serves as a part of a filter, so that the requirement for suppressing high-frequency interference of the magnetron filter assembly 20 is reduced, and the parameter selection of the magnetron filter assembly 20 has greater freedom, for example, in the embodiment, a normal level of filter processing can be performed without arranging a coil, and the volume of the shielding box 21 is reduced by canceling the coil while the Electromagnetic Compatibility (EMC) performance of the magnetron is ensured, so that the volume of the magnetron is finally reduced, and the phenomenon of discharge and ignition between the coil and the shielding box 21 is avoided, so that certain safety guarantee is provided. In addition, in the embodiment, the conventional coil is omitted, so that the problem that the turn-to-turn distances of the coils at two ends are different when the coil is provided with the hollow core section and the magnetic core section can be avoided, and the process procedure is simplified.

Specifically, in comparison with fig. 1 and 2, in the magnetron filter assembly 20 shown in fig. 2, after the choke coil 12 in fig. 1 is eliminated, the distance N between the first sidewall 211 and the third sidewall 213 in fig. 2 is smaller than the distance L between the first sidewall 111 and the third sidewall 113 in fig. 1, and the distance O between the second sidewall 212 and the fourth sidewall 214 is smaller than the distance M between the second sidewall 112 and the fourth sidewall 114 in fig. 1, so that the volume of the whole shield box 21 is reduced. In other embodiments, the height of the shield case 21 can be reduced accordingly because the choke coil is eliminated. And the volume of the entire shield can 21 is reduced.

In this embodiment, the magnetron filter assembly 20 sets the LCL resonant circuit formed by the first dissipative medium 23, the feedthrough capacitor assembly 22 and the cathode line 222 sleeved on the outgoing line around the second dissipative medium 24 to suppress and consume the high-frequency electromagnetic waves generated by the magnetron, so that the magnetron filter assembly 20 can achieve filtering without setting a coil, and when the volume of the shielding box 21 is set, the problem that the distance between the coil and the shielding box 21 must be ensured because the phenomenon of discharge and ignition occurs between the coil and the shielding box 21 does not need to be considered, and the volume of the shielding box 21 can be reduced, and finally the volume of the magnetron is reduced. And by reducing the volume of the coil and the shielding box 21, the material for manufacturing the coil and the shielding box 21 can be saved correspondingly, and the production cost of the magnetic control filter component 20 is reduced.

Referring to fig. 4, fig. 4 is a schematic structural diagram of another embodiment of a magnetron filter assembly provided in the present application, and a magnetron filter assembly 40 provided in the present embodiment includes a shield box 41, a feedthrough capacitor assembly 42, a first consumable medium 43, and a second consumable medium 44.

Inside the shield case 41 is a housing chamber for housing a portion of the feedthrough capacitor assembly 42 and the first consumable medium 43.

The magnetron filter assembly 40 is disposed on a magnetron body including a cathode terminal 45 and a cathode, the cathode terminal 45 is led out from the magnetron body and penetratingly disposed at the bottom of the shield case 41, and one end of the cathode terminal 45 is connected to the cathode. The cathode terminal 45 penetrates the bottom of the shield case 41, and the other end is disposed in the accommodation cavity of the shield case 41.

The feedthrough capacitor assembly 42 is disposed through a sidewall of the shielding box 41, and a part of the feedthrough capacitor assembly 42 is disposed in the accommodating cavity of the shielding box 41. The feedthrough capacitor assembly 42 includes an outgoing line 421 led out into the shield case 41 and a cathode line 422 led out from the shield case 41, the outgoing line 421 is connected to the cathode terminal, and one end of the cathode line 422 is connected to the outgoing line 421. As shown in fig. 4, the shield case 41 includes a first sidewall 411, a second sidewall 412, a third sidewall 413, and a fourth sidewall 414. The feedthrough capacitor assembly 42 is disposed through the first sidewall 411 of the shielding box 41, where a distance between the first sidewall 411 and the third sidewall 413 is P, and a distance between the second sidewall 412 and the fourth sidewall 414 is Q.

The first consumption medium 43 is sleeved on the cathode terminal 45 and is used for consuming electromagnetic waves along the cathode terminal 45. Specifically, the cathode terminal 45 includes a first cathode terminal 451 and a second cathode terminal 452, and the first cathode terminal 451 and the second cathode terminal 452 are connected to both ends of the cathode of the magnetron, respectively. The first expendable medium 43 is provided with a through hole through which the first cathode terminal 451 and the second cathode terminal 452 are passed.

In other embodiments, the first dissipative medium 43 is provided with a third through hole through which the first cathode terminal 451 is arranged and a fourth through hole through which the second cathode terminal 452 is arranged. At this time, the first and second cathode terminals 451 and 452 form an inductance with the first dissipative medium 43, which has both the characteristics of differential mode inductance and common mode inductance, and can dissipate the electromagnetic waves along the cathode terminal 45 when the magnetron filter assembly 40 is in operation.

Specifically, the lead line 421 includes a first lead line 4211 and a second lead line 4212, one end of the first lead line 4211 is connected to the first cathode terminal 451, and one end of the second lead line 4212 is connected to the second cathode terminal 452. Because the lead-out wire 421 is directly connected with the cathode terminal 45, the coil originally connected with the cathode terminal 45 and the lead-out wire 421 is abandoned, and the space occupied by the coil in the shielding box 41 is released, so that when the volume of the shielding box 41 is set, the problem that the distance between the coil and the shielding box 41 must be ensured because the phenomenon of discharge and ignition can occur between the coil and the shielding box 41 is not considered, and the volume of the shielding box 41 can be reduced.

The cathode line 422 is disposed around the second dissipative medium 44 and is used to connect to a power source, and the second dissipative medium 44 is used to dissipate electromagnetic waves along the cathode line 422. Wherein the second consumable medium 44 is located outside the shield can 41. Specifically, the cathode lines 422 include first and second cathode lines 4221 and 4222, one end of the first cathode line 4221 is connected to the other end of the first outgoing line 4211, and one end of the second cathode line 4222 is connected to the other end of the second outgoing line 4212. The second consumption medium 44 may be in a ring shape, the first cathode wire 4221 and the second cathode wire 4222 are wound around the second consumption medium 44 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. In this way, the whole magnetron filter assembly 40 utilizes the LCL resonant circuit formed by the first consumption medium 43, the feedthrough capacitor assembly 42 and the cathode wire 422 sleeved on the cathode terminal 45 and arranged around the second consumption medium 44 to suppress and consume the high-frequency electromagnetic waves generated by the magnetron, so that the filtering can be realized without arranging a coil in the magnetron filter assembly 40, and therefore, when the volume of the shielding box 41 is set, the problem that the distance between the coil and the shielding box 41 is required to be ensured because the phenomenon of discharge and ignition can occur between the coil and the shielding box 41 is not required to be considered, the volume of the shielding box 41 can be reduced, and finally, the volume of the magnetron is reduced.

Specifically, in comparison with fig. 1 and 4, in the magnetron filter assembly 40 shown in fig. 4, after the choke coil 12 in fig. 1 is eliminated, the distance P between the first sidewall 411 and the third sidewall 413 in fig. 4 is smaller than the distance L between the first sidewall 111 and the third sidewall 113 in fig. 1, and the distance Q between the second sidewall 412 and the fourth sidewall 414 is smaller than the distance M between the second sidewall 112 and the fourth sidewall 114 in fig. 1, so that the volume of the whole shield case 41 is reduced. In other embodiments, the height of the shield case 41 can be reduced accordingly because the choke coil is eliminated. And the volume of the entire shield case 41 is reduced.

In a practical scenario, when the magnetron filter assembly 40 is powered on, the cathode in the magnetron emits thermal electrons at a temperature of about 2000K, the thermal electrons rotate in the action space, so as to generate an electric field of about 2450MHZ, the thermal electrons become harmonics under the action of the electric field and the magnetic field in the action space, and the harmonics are emitted to the outside through the antenna, and not only the fundamental wave for cooking but also high-frequency harmonics of integral multiple of the fundamental wave frequency are generated in the action space, and for the high-frequency harmonics, usually through the cathode terminal 45 connected to the cathode, the radiation is performed to the outside space through the first consumption medium 43, and after the material (such as ceramic) originally sleeved on the cathode terminal 45 is replaced by the first consumption medium 43, the first consumption medium 43 corresponds to a cathode insulation support column, namely, a low pass filter is added to the cathode terminal 45, the low-pass filter can inhibit the interference of high-frequency electromagnetic waves led out from the cathode terminal 45, and meanwhile, the ferrite material can play a role in shielding consumption due to the property of the material of the ferrite material, so that the component of the high-frequency interference penetrating through the first consumption medium 43 to radiate to the space is reduced, the effect of filtering from the source is achieved, and the filtering effect is more stable.

Referring to fig. 5, fig. 5 is a schematic structural diagram of another embodiment of a magnetron filtering component according to the present application. The magnetron filter assembly 50 provided by the embodiment comprises a shielding box 51, a feedthrough capacitor assembly 52, a first consumable medium 53 and a second consumable medium 54.

Inside the shield box 51 is a receiving cavity for receiving a part of the feedthrough capacitor assembly 52, the first dissipative medium 53 and the insulating support column 55 of the magnetron.

The magnetron filter assembly 50 is disposed on a magnetron body including a cathode terminal 56 and a cathode, the cathode terminal 56 is drawn out from the magnetron body and penetratingly disposed at the bottom of the shield case 51, and one end of the cathode terminal 56 is connected to the cathode. The cathode terminal 56 penetrates the bottom of the shield case 51, and the other end is disposed in the accommodation chamber of the shield case 51. Specifically, the cathode terminal 56 is disposed through the insulating support column 55.

The feedthrough capacitor assembly 52 is disposed through a sidewall of the shielding box 51, and a part of the feedthrough capacitor assembly 52 is disposed in the receiving cavity of the shielding box 51. The feedthrough capacitor assembly 52 includes a lead wire 521 led out into the shield case 51 and a cathode wire 522 led out of the shield case 51, the lead wire 521 is connected to the cathode terminal 56, and one end of the cathode wire 522 is connected to the lead wire 521. As shown in fig. 5, the shield case 51 includes a first sidewall 511, a second sidewall 512, a third sidewall 513, and a fourth sidewall 514. The feedthrough capacitor assembly 52 is disposed through the first sidewall 511 of the shielding box 51, where a distance between the first sidewall 511 and the third sidewall 513 is R, and a distance between the second sidewall 512 and the fourth sidewall 514 is S.

The first consumption medium 53 is sleeved on the insulating support column 55, the insulating support column 55 is sleeved on the cathode terminal 56, and the first consumption medium 53 is used for consuming electromagnetic waves along the cathode terminal 56 penetrating through the insulating support column 55. Specifically, the cathode terminal 56 includes a first cathode terminal 561 and a second cathode terminal 562, and the first cathode terminal 561 and the second cathode terminal 562 are connected to both ends of the cathode of the magnetron, respectively. The insulating support column 55 is provided with a through hole through which the first cathode terminal 561 and the second cathode terminal 562 are inserted.

At this time, the first cathode terminal 561, the second cathode terminal 562 and the first dissipative medium 53 form an inductance that dissipates electromagnetic waves along the cathode terminal 56 when the magnetron filter assembly 50 is in operation.

Specifically, the lead lines 521 include a first lead line 5211 and a second lead line 5212, one end of the first lead line 5211 is connected to the first cathode terminal 561, and one end of the second lead line 5212 is connected to the second cathode terminal 562. Because the lead wire 521 is directly connected with the cathode terminal 56, the coil originally connecting the cathode terminal 56 and the lead wire 521 is abandoned, and the space occupied by the coil in the shielding box 51 is released, so that when the volume of the shielding box 51 is set, the problem that the distance between the coil and the shielding box 51 must be ensured because the phenomenon of discharge ignition can occur between the coil and the shielding box 51 is not considered, and the volume of the shielding box 51 can be reduced.

The cathode line 522 is disposed around the second dissipative medium 54 and is used to connect to a power source, and the second dissipative medium 54 is used to dissipate electromagnetic waves along the cathode line 522. Wherein the second consumable medium 54 is located outside the shielding cage 51. Specifically, the cathode lines 522 include a first cathode line 5221 and a second cathode line 5222, one end of the first cathode line 5221 being connected to the other end of the first outlet line 5211, and one end of the second cathode line 5222 being connected to the other end of the second outlet line 5212. The second consumption medium 54 may be in a ring shape, the first cathode line 5221 and the second cathode line 5222 are wound around the second consumption medium 54 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. In this way, the whole magnetron filter assembly 50 utilizes the LCL resonant circuit formed by the first dissipative medium 53, the feedthrough capacitor assembly 52 and the cathode wire 522 sleeved on the insulating support column 55 of the magnetron and arranged around the second dissipative medium 54 to suppress and dissipate the high-frequency electromagnetic waves generated by the magnetron, so that the filtering can be realized without arranging a coil in the magnetron filter assembly 50, and therefore, when the volume of the shielding box 51 is set, the problem that the distance between the coil and the shielding box 51 must be ensured because the phenomenon of discharge and ignition can occur between the coil and the shielding box 51 does not need to be considered, the volume of the shielding box 51 can be reduced, and finally, the volume of the magnetron is reduced.

Specifically, in comparison with fig. 1 and 5, in the magnetron filter assembly 50 shown in fig. 5, after the choke coil 12 in fig. 1 is eliminated, the distance R between the first sidewall 511 and the third sidewall 513 in fig. 5 is smaller than the distance L between the first sidewall 111 and the third sidewall 113 in fig. 1, and the distance S between the second sidewall 512 and the fourth sidewall 514 is smaller than the distance M between the second sidewall 112 and the fourth sidewall 114 in fig. 1, so that the volume of the whole shield case 51 is reduced. In other embodiments, the height of the shield case 51 can be reduced accordingly because the choke coil is eliminated. And thus the volume of the entire shield case 51 is reduced.

Referring to fig. 6, fig. 6 is a schematic structural diagram of another embodiment of a magnetron filtering component according to the present application. The magnetron filter assembly 60 provided by the present embodiment includes a shield case 61, a feedthrough capacitor assembly 62, a first dissipative medium 63, a second dissipative medium 64, and a third dissipative medium 65.

Inside the shielding box 61 is a housing chamber for housing a part of the feedthrough capacitor assembly 62, the first consumable medium 63, and the third consumable medium 65.

The magnetron filter assembly 60 is disposed on a magnetron body including a cathode terminal 66 and a cathode, the cathode terminal 66 is drawn out from the magnetron body and penetratingly disposed at the bottom of the shield case 61, and one end of the cathode terminal 66 is connected to the cathode. The cathode terminal 66 penetrates the bottom of the shield case 61, and the other end is disposed in the accommodation chamber of the shield case 61.

The feedthrough capacitor assembly 62 is disposed through a sidewall of the shielding box 61, and a portion of the feedthrough capacitor assembly 62 is disposed in the accommodating cavity of the shielding box 61. The feedthrough capacitor assembly 62 includes a lead 621 led out of the shielding case 61 and a cathode line 622 led out of the shielding case 61, the lead 621 is connected to the cathode terminal 66, and one end of the cathode line 622 is connected to the lead 621. As shown in fig. 6, the shield case 61 includes a first sidewall 611, a second sidewall 612, a third sidewall 613, and a fourth sidewall 614. The feedthrough capacitor assembly 62 is disposed through the first sidewall 611 of the shielding box 61, where a distance between the first sidewall 611 and the third sidewall 613 is T, and a distance between the second sidewall 612 and the fourth sidewall 614 is U.

The first consumption medium 63 is sleeved on the cathode terminal 66 and is used for consuming electromagnetic waves along the cathode terminal 66. Specifically, the cathode terminal 66 includes a first cathode terminal 661 and a second cathode terminal 662, and the first cathode terminal 661 and the second cathode terminal 662 are respectively connected to both ends of the cathode of the magnetron.

In other embodiments, the first dissipative medium 63 is provided with a third through hole through which the first cathode terminal 661 is arranged and a fourth through hole through which the second cathode terminal 662 is arranged. At this time, the first and second cathode terminals 661 and 662 form an inductor with the first dissipative medium 63, which has both differential mode and common mode inductance characteristics, and dissipates electromagnetic waves along the cathode terminal 66 when the magnetron filter assembly 60 is in operation.

Specifically, the lead-out line 621 includes a first lead-out line 6211 and a second lead-out line 6212, one end of the first lead-out line 6211 being connected to the first cathode terminal 661, and one end of the second lead-out line 6212 being connected to the second cathode terminal 662. Because the lead-out wire 621 is directly connected with the cathode terminal 66, the coil originally connected with the cathode terminal 66 and the lead-out wire 621 is abandoned, and the space occupied by the coil in the shielding box 61 is released, so that when the volume of the shielding box 61 is set, the problem that the distance between the coil and the shielding box 61 must be ensured because the phenomenon of discharge ignition can occur between the coil and the shielding box 61 is not considered, and the volume of the shielding box 61 can be reduced.

The third dissipation medium 65 is disposed around the lead line 621 for dissipating the electromagnetic wave along the lead line 621. In this way, the consumption of electromagnetic waves is further increased. Further, the third consumable medium 65 may be disposed in the inner housing of the feedthrough capacitor assembly 62, does not occupy space inside the shielding box 61, and abandons the coil originally connecting the cathode terminal 66 and the outgoing line 621, so that when the volume of the shielding box 61 is set, the problem that the distance between the coil and the shielding box 61 must be ensured because the phenomenon of discharge and ignition occurs between the coil and the shielding box 61 does not need to be considered, and the volume of the shielding box 61 can be reduced.

The cathode line 622 is disposed around the second dissipative medium 64 and is used to connect to a power source, and the second dissipative medium 64 is used to dissipate electromagnetic waves along the cathode line 622. Wherein the second consumable medium 64 is located outside the shield can 61. Specifically, the cathode lines 622 include first cathode lines 6221 and second cathode lines 6222, one end of the first cathode lines 6221 being connected to the other end of the first lead 6211, and one end of the second cathode lines 6222 being connected to the other end of the second lead 6212. The second consumption medium 64 may be ring-shaped, the first cathode line 6221 and the second cathode line 6222 are disposed around the second consumption medium 64 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 so on. In this way, the whole magnetron filter assembly 60 utilizes the resonant circuit formed by the first consumable medium 63 sleeved on the cathode terminal 66, the third consumable medium 65 sleeved on the outgoing line 621, the feedthrough capacitor assembly 62 and the cathode wire 622 arranged around the second consumable medium 64 to suppress and consume the high-frequency electromagnetic wave generated by the magnetron, so that the filtering can be realized without arranging a coil in the magnetron filter assembly 60, and the problem that the distance between the coil and the shielding box 61 is required to be ensured because the phenomenon of discharge and ignition can occur between the coil and the shielding box 61 when the volume of the shielding box 61 is set is avoided, thereby reducing the volume of the shielding box 61 and finally reducing the volume of the magnetron.

Specifically, in comparison with fig. 1 and 6, in the magnetron filter assembly 60 shown in fig. 6, after the choke coil 12 in fig. 1 is eliminated, the distance T between the first sidewall 611 and the third sidewall 613 in fig. 6 is smaller than the distance L between the first sidewall 111 and the third sidewall 113 in fig. 1, and the distance U between the second sidewall 612 and the fourth sidewall 614 is smaller than the distance M between the second sidewall 112 and the fourth sidewall 114 in fig. 1, so that the volume of the whole shield case 61 is reduced. In other embodiments, the height of the shield case 61 can be reduced accordingly because the choke coil is eliminated. And the volume of the entire shield case 61 is reduced.

Referring to fig. 7, fig. 7 is a schematic structural diagram of another embodiment of a magnetron filtering component according to the present application. The magnetron filter assembly 70 provided by the present embodiment includes a shield case 71, a feedthrough capacitor assembly 72, a first consumable medium 73, a second consumable medium 74, and a third consumable medium 75.

Inside the shield case 71 is a receiving cavity for receiving a part of the feedthrough capacitor assembly 72, the first dissipative medium 73, the third dissipative medium 75, and the insulating support posts 76 of the magnetron.

The magnetron filter assembly 70 is disposed on a magnetron body including a cathode terminal 77 and a cathode, the cathode terminal 77 is drawn out from the magnetron body and penetratingly disposed at the bottom of the shield case 71, and one end of the cathode terminal 77 is connected to the cathode. The cathode terminal 77 penetrates the bottom of the shield case 71, and the other end is disposed in the accommodation chamber of the shield case 71. Specifically, the cathode terminal 77 is disposed through the insulating support post 76.

The feedthrough capacitor assembly 72 is disposed through a sidewall of the shielding box 71, and a part of the feedthrough capacitor assembly 72 is disposed in the accommodating cavity of the shielding box 71. The feedthrough capacitor assembly 72 includes an outgoing line 721 led out into the shield case 71 and a cathode line 722 led out of the shield case 71, the outgoing line 721 is connected to the cathode terminal 77, and one end of the cathode line 722 is connected to the outgoing line 721. As shown in fig. 7, the shield case 71 includes a first sidewall 711, a second sidewall 712, a third sidewall 713, and a fourth sidewall 714. The feedthrough capacitor assembly 72 is disposed through the first sidewall 711 of the shield case 71, where a distance between the first sidewall 711 and the third sidewall 713 is V, and a distance between the second sidewall 712 and the fourth sidewall 714 is W.

The first consumption medium 73 is sleeved on the insulating support column 76, the insulating support column 76 is sleeved on the cathode terminal 77, and the first consumption medium 73 is used for consuming electromagnetic waves along the cathode terminal 77 penetrating through the insulating support column 76. Specifically, the cathode terminal 77 includes a first cathode terminal 771 and a second cathode terminal 772, and the first cathode terminal 771 and the second cathode terminal 772 are respectively connected to both ends of the cathode of the magnetron. The insulating support post 76 is provided with a through hole through which the first cathode terminal 771 and the second cathode terminal 772 are inserted.

At this time, the first and second cathode terminals 771 and 772 form an inductance with the first dissipative medium 73, which dissipates the electromagnetic waves along the cathode terminal 77 when the magnetron filter assembly 70 is in operation.

Specifically, the lead wire 721 includes a first lead wire 7211 and a second lead wire 7212, one end of the first lead wire 7211 is connected to the first cathode terminal 771, and one end of the second lead wire 7212 is connected to the second cathode terminal 772. Because the lead-out wire 721 is directly connected with the cathode terminal 77, the coil originally connecting the cathode terminal 77 and the lead-out wire 721 is eliminated, and the space occupied by the coil in the shielding box 71 is released, so that when the volume of the shielding box 71 is set, the problem that the distance between the coil and the shielding box 71 needs to be ensured because the phenomenon of discharge ignition of the coil and the shielding box 71 does not need to be considered, and the volume of the shielding box 71 can be reduced.

The third dissipation medium 75 is disposed around the outgoing line 721 and is used for dissipating the electromagnetic wave along the outgoing line 721. In this way, the consumption of electromagnetic waves is further increased. Further, the third consumable medium 75 may be disposed in the inner housing of the feedthrough capacitor 72, and does not occupy space inside the shield case 71, and the coil originally connecting the cathode terminal 77 and the outgoing line 721 is omitted, so that when the volume of the shield case 71 is set, the problem that the distance between the coil and the shield case 71 must be ensured because the coil and the shield case 71 may generate discharge and fire is not considered, and the volume of the shield case 71 can be reduced.

The cathode line 722 is disposed around the second dissipative medium 74 and is used to connect to a power supply, and the second dissipative medium 74 is used to dissipate electromagnetic waves along the cathode line 722. Wherein the second consumable medium 74 is located outside the shield can 71. Specifically, the cathode line 722 includes a first cathode line 7221 and a second cathode line 7222, one end of the first cathode line 7221 is connected to the other end of the first outgoing line 7211, and one end of the second cathode line 7222 is connected to the other end of the second outgoing line 7212. The second consumption medium 74 may be in a ring shape, the first cathode wire 7221 and the second cathode wire 7222 are wound around the second consumption medium 74 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. In this way, the whole magnetron filter assembly 70 utilizes the resonant circuit formed by the first consumable medium 73 sleeved on the insulating support column 76, the third consumable medium 75 sleeved on the outgoing line 721, the feedthrough capacitor assembly 72 and the cathode wire 722 arranged around the second consumable medium 74 to suppress and consume the high-frequency electromagnetic waves generated by the magnetron, so that the magnetron filter assembly 70 can realize filtering without arranging a coil, and when the volume of the shielding box 71 is arranged, the problem that the distance between the coil and the shielding box 71 is required to be ensured because the phenomenon of discharge and ignition of the coil and the shielding box 71 is not required to be considered, thereby reducing the volume of the shielding box 71 and finally reducing the volume of the magnetron.

Specifically, in comparison with fig. 1 and 7, in the magnetron filter assembly 70 shown in fig. 7, after the choke coil 12 in fig. 1 is eliminated, the distance V between the first sidewall 711 and the third sidewall 713 in fig. 7 is smaller than the distance L between the first sidewall 111 and the third sidewall 113 in fig. 1, and the distance W between the second sidewall 712 and the fourth sidewall 714 is smaller than the distance M between the second sidewall 112 and the fourth sidewall 114 in fig. 1, so that the volume of the entire shield case 71 is reduced. In other embodiments, the height of the shield case 71 can be reduced accordingly because the choke coil is eliminated. And the volume of the entire shield case 71 is reduced.

In some embodiments, the volume of the shield can may also be reduced in the following manner. For example, under the above-described consumption action of the first consumable medium 73, the second consumable medium 74, or the third consumable medium 75 against electromagnetic waves, the volume of the entire shield case 71 can be reduced by shortening the distance between the cathode terminal 77 and the lead-out wire 721.

Furthermore, due to the working characteristics of the magnetron, when the magnetron works normally, the magnetron filtering component is connected with negative high voltage, and in order to prevent the phenomenon of discharge and ignition between the hollow coil in the magnetron filtering component and the shielding box, the relative distance between the hollow coil and the feedthrough capacitor component and the shielding box needs to be ensured during design. The prior art uses air as an insulating medium to avoid the phenomenon of point discharge, and has the defects that the volume of a shielding box is inevitably overlarge due to the fact that the air is used as the insulating medium, so that the whole volume of a magnetron is increased, and further, the volume of household appliances such as a microwave oven is huge, and the effective use area is small. 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 provided within the shielding cage, which in this embodiment may be present in a number of different ways. For example, if a gas such as sulfur hexafluoride is used as the insulating material, the insulating gas may be uniformly filled into the shield case, or when a solid or liquid insulating material is used, the solid or liquid insulating material may be wrapped around a device such as a hollow coil, or the solid or liquid insulating material may be attached to the inner wall of the shield case, and the liquid insulating material is usually natural mineral oil, natural vegetable oil, synthetic oil, or the like, and the solid insulating material is usually insulating paint, insulating paste, fiber product, rubber, plastic and its product, glass, ceramic product, mica, asbestos and its product, or the like.

The insulating material may be added with a material that absorbs electromagnetic waves, such as graphite, ferrite, or the like. In this way, the number of media consuming electromagnetic waves in the shield case can be increased, and the volume of the shield case can be further reduced.

Referring to fig. 8, fig. 8 is a schematic structural diagram of an embodiment of a magnetron provided by the present application. The magnetron 80 includes a magnetron body 81 and a magnetron filter assembly 82. Wherein, the magnetron filtering component 82 is disposed on the magnetron main body 81 for consuming the electromagnetic wave transmitted from the magnetron main body 81, and the magnetron filtering component 82 is as provided in any of the above embodiments. The magnetron filtering component restrains and consumes high-frequency electromagnetic waves generated by the magnetron through the LCL resonant circuit formed by the first consumption medium sleeved on the cathode terminal or the outgoing line, the through capacitor component and the cathode line wound on the second consumption medium, so that filtering can be realized without arranging a coil in the magnetron filtering component, and when the volume of the shielding box is set, the problem that the distance between the coil and the shielding box must be ensured because the phenomenon of discharging and igniting can occur between the coil and the shielding box is not considered, the volume of the shielding box can be reduced, and finally the volume of the magnetron is reduced.

Referring to fig. 9, fig. 9 is a schematic structural diagram of an embodiment of a household appliance provided in the present application. The household appliance 90 comprises a magnetron 91. In the magnetron 91 according to the above embodiment, since the magnetron filtering assembly according to any of the above embodiments is present in the magnetron according to the above embodiments, the volume of the household appliance 90 is reduced due to the reduction of the volume of the magnetron filtering assembly.

The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.