CN214753633U - Magnetron filtering component, magnetron and household appliance - Google Patents

Abstract

The application discloses 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; the coil is arranged in the shielding box, and one end of the 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 a lead-out wire led out into the shielding box, and the lead-out wire is connected with the other end of the coil; and the insulating gasket is arranged on the inner top wall, the inner bottom wall and the inner side wall of the shielding box. In this way, the volume of the magnetron can be 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.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems, the present application provides a magnetron filter assembly, a magnetron, and a home appliance, which can reduce the volume of the magnetron.

In order to solve the technical problem, the application adopts a technical scheme that: there is provided 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; the coil is arranged in the shielding box, and one end of the 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 a lead-out wire led out into the shielding box, and the lead-out wire is connected with the other end of the coil; and the insulating gasket is arranged on the inner top wall, the inner bottom wall and the inner side wall of the shielding box.

The shielding box comprises a shielding box body and a shielding box cover body, wherein the shielding box body comprises a bottom wall and a side wall; the insulating gasket includes: the first insulating gasket is arranged at the bottom of the shielding box body; the second insulating liner is arranged corresponding to the side wall of the shielding box body and the shielding box cover body.

Wherein the second insulating pad includes: a top surface; the first side surface, the second side surface and the third side surface are connected in sequence, and the first side surface, the second side surface and the third side surface are connected with the top surface; the top surface of the shielding box is arranged corresponding to the shielding box cover body, and the gap between the first side surface and the third side surface of the shielding box is arranged corresponding to the side wall through which the feedthrough capacitor assembly penetrates.

The first insulating gasket and the side wall of the shielding box body are spaced by a preset distance, and the second insulating gasket is clamped between the first insulating gasket and the side wall of the shielding box body.

The cathode terminal is arranged in a ceramic column of the magnetron, and the ceramic column penetrates through the bottom of the shielding box; a through hole is formed in the first insulating pad, and the ceramic column is arranged in the through hole.

Wherein, insulating liner is close to punching capacitor subassembly one side and is provided with a plurality of wind holes for dispel the heat in the shielding box.

Wherein, the coil includes: one end of the hollow section coil is connected with the other end of the cathode terminal; and one end of the core section coil is connected with the other end of the hollow section coil, and the other end of the core section coil is connected with the outgoing line.

Wherein, the thickness of the insulating gasket is 1-3 mm.

In order to solve the above technical problem, another technical solution adopted by the present application is: provided is 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.

In order to solve the above technical problem, a further technical solution adopted by the present application is to provide a household appliance including a magnetron, the magnetron being provided as the magnetron according to the above technical solution.

The beneficial effects of the embodiment of the application are that: the magnetron filtering component comprises a shielding box, wherein a cathode terminal of a magnetron penetrates through the bottom of the shielding box, and one end of the cathode terminal is connected with a cathode of the magnetron; the coil is arranged in the shielding box, and one end of the 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 a lead-out wire led out into the shielding box, and the lead-out wire is connected with the other end of the coil; and the insulating gasket is arranged on the inner top wall, the inner bottom wall and the inner side wall of the shielding box. Through the mode, utilize the insulating liner who sets up in top wall, interior diapire and inside wall in the shielding box, can follow a plurality of dimensions and shield the box and insulate, on the basis of guaranteeing that can't take place the phenomenon of striking sparks in the shielding box, reduce the coil and wear the requirement of safe distance between electric capacity subassembly and the shielding box, increase the telescopic degree of freedom of shielding box, and then can reduce the volume of shielding box, finally reduced the volume of 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 view showing a structure of a filtering assembly of a magnetron in the related art;

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

FIG. 3 is a schematic structural diagram of a first insulating pad provided herein;

FIG. 4 is a schematic diagram of a second insulating liner provided herein;

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 a magnetron filtering assembly according to yet another embodiment of the present application;

FIG. 7 is a schematic structural diagram of a magnetron filtering assembly according to yet another embodiment of 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.

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.

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 a magnetron filtering assembly in the related art. As shown in fig. 1, a conventional magnetron filter assembly 10 includes a shield case 11, a choke coil 12, and a feedthrough capacitor 13. Wherein, choke coil 12 is set in shield box 11, one end of choke coil 12 is connected with cathode terminal of 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.

The inventor of the present application has found, through long-term research, that in some applications of a household appliance (for example, a microwave oven), 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 is an important reason that the volume of the magnetron is difficult to reduce. Based on this, the following examples are proposed:

referring to fig. 2, fig. 2 is a schematic structural diagram of an embodiment of a magnetron filter assembly provided in the present application, and as shown in fig. 2, the magnetron filter assembly 20 provided in the present embodiment includes a shielding box 21, a coil 22, a feedthrough capacitor assembly 23, and an insulating gasket 24, and further includes a cathode terminal 26 disposed at the bottom of the shielding box 21, specifically, the cathode terminal 26 of the magnetron is disposed at the bottom of the shielding box 21 in a penetrating manner, and one end of the cathode terminal 26 is connected to a cathode (not shown) of the magnetron.

Wherein, the coil 22 is arranged in the shielding box 21, and one end of the coil 22 is connected with the other end of the cathode terminal 26; specifically, the coil 22 includes a hollow-segment coil and a core-segment coil, one end of the hollow-segment coil is connected to the other end of the cathode terminal 26, one end of the core-segment coil is connected to the other end of the hollow-segment coil, and the other end of the core-segment coil is connected to the other end of the hollow-segment coil.

The feedthrough capacitor assembly 23 is disposed through a sidewall of the shield case 21, and the feedthrough capacitor assembly 23 includes a lead 221 led out into the shield case 21, and the lead 221 is connected to the other end of the coil 22.

The shielding box 21 includes a shielding box body and a shielding box cover (not shown), the shielding box body is used for disposing the coil 22, the feedthrough capacitor assembly 23, the insulating gasket 24, the ceramic post 25 of the magnetron, and the like, the ceramic post 25 is disposed at the bottom of the shielding box 21 in a penetrating manner, and the cathode terminal 26 is disposed in the ceramic post 25.

Further, insulating gaskets 24 are provided on the inner top wall, inner bottom wall and inner side wall of the shield case 21, and are provided to surround the coil 22 and the partial feedthrough capacitor assembly 23. Note that the insulating spacer 24 of the inner ceiling portion is not shown in fig. 5.

Specifically, the insulating pad 24 may include a first insulating pad 241 and a second insulating pad 242, as shown in fig. 3 and 4, where fig. 3 is a schematic structural diagram of the first insulating pad provided in the present application, and fig. 4 is a schematic structural diagram of the second insulating pad provided in the present application.

Referring to fig. 3, the first insulating pad 241 is disposed at the bottom of the shielding box body, and has the same shape as the bottom of the shielding box 21, for example, approximately rectangular or square, so as to dispose the first insulating pad 241 at the bottom for bonding and fixing. In this embodiment, the first insulating pad 241 is further provided with a through hole 24a, the position of the through hole 24a is the same as the position of the ceramic post 25, and the ceramic post 25 is disposed in the through hole 24a, so that the hole wall of the through hole 24a is attached to the outer wall of the ceramic post 25, so as to further fix the first insulating pad 241 to the bottom of the shielding box 21 by using the relationship between the through hole 24a and the ceramic post 25.

Further, referring to fig. 4, the second insulating pad 242 is disposed corresponding to the side wall of the shielding box body and the shielding box cover, that is, disposed on the inner top wall and the inner side wall of the shielding box 21, the second insulating pad 242 specifically includes a top surface disposed on the inner top wall of the shielding box 21, and a first side surface a, a second side surface B, and a third side surface C sequentially connected to the inner side wall of the shielding box 21, wherein the first side surface a, the second side surface B, and the third side surface C are all connected to the top surface, a gap exists between the first side surface a and the third side surface C, and a position of the gap corresponds to the side wall through which the feedthrough capacitor assembly 23 penetrates, that is, opposite to the second side surface B. The coil 22 and the feedthrough capacitor assembly 23 can thus be surrounded from four dimensions in the form of a cover consisting of three side faces and a top face, wherein the second side face B opposite the cutout side face can be arranged in an arc-shaped manner according to the shape of the shielding cage 21.

Alternatively, by spacing a preset distance between the first insulating pad 241 and the inner sidewall of the shielding box 21, the preset distance may be the thickness of one insulating pad 24, so that the first side a, the second side B and the third side C of the second insulating pad 242 can utilize the space of the preset distance, and the first insulating pad 241 is clamped between the first insulating pad 241 and the sidewall of the shielding box 21, so that the first insulating pad 241 and the second insulating pad 242 can be fixed to each other, by such a clamping and fixing manner, when the insulating pad 24 is installed, the first insulating pad 241 may be installed at the bottom of the shielding box 21, then the second insulating pad 242 may be installed downward from the top of the shielding box 21, so as to wrap the coil 22, the feedthrough capacitor assembly 23, the ceramic column 25, and the like, and be clamped and fixed with the first insulating pad 241, and finally the cover of the shielding box 21 is installed, the process does not need to add special fixed installation procedures, and can simplify the manufacturing process flow.

In other embodiments, the first insulating pad 241 and the second insulating pad 242 may be fixed on the inner wall of the shielding box 21 by other methods, such as an adhesive method, by coating a coating with viscosity on the inner wall of the shielding box 21 or the insulating pad 24, or by a screw method, for example, and the first insulating pad 241 and the second insulating pad 242 may be directly fixed at corresponding positions without a predetermined distance between the inner walls of the shielding box 21 and the first insulating pad 241. Specifically, the fixing manner is not limited to the above example as long as it can satisfy the fixing of the insulating spacer 24 to the inner wall of the shield case 21.

Since the temperature of the coil 22 can reach 120 ℃ or higher during normal operation of the magnetron, the material used for the insulating pad 24 in this embodiment should be an insulating material capable of withstanding high temperature for a long time, and the material needs to satisfy an insulating withstand voltage of 4kv while a certain margin is reserved, the thickness of the insulating pad 24 is determined according to the withstand voltage insulation characteristics of the selected material, and specifically, the material selected for the insulating pad 24 needs to satisfy: -the insulating material has a withstand voltage per mm >4kv material thickness.

In this embodiment, the thickness of the insulating spacer 24 may be 1-3 mm.

Optionally, the first insulating pad 241 and the second insulating pad 242 are provided with a plurality of air holes 24b at suitable positions thereof to help the coil 22 and the feedthrough capacitor assembly 23 dissipate heat during operation; specifically, wind hole 24b can be seted up and be close to feedthrough capacitor assembly 23 one side, and the aperture of wind hole 24b can be far less than the through-hole 24a that is used for setting up ceramic post 25, through cooperating with the wind hole 24b that sets up on a plurality of inner walls of shielding box 21, realizes the air convection, can help whole device heat dissipation. The specific position of the air hole 24b may be changed according to actual conditions, and is not limited to the example in the embodiment.

In this embodiment, by providing the insulating liner 24 in the shielding box 21, it is ensured that the coil 22 and the shielding box 21 do not generate a discharge spark phenomenon, and at the same time, the requirement of the safety distance between the coil 22 and the shielding box 21 is reduced, and the degree of freedom of the telescopic structure of the shielding box 21 is increased, so as to reduce the distance between the coil 22 and the inner wall of the shielding box 21, so that the size of the shielding box 21 can be reduced in multiple dimensions of length, width and height, and further the size of the shielding box 21 can be reduced, and finally the size of the magnetron is reduced. Compared with the traditional magnetron, the volume of the shielding box 21 provided by the embodiment can be reduced by more than 50%, and the shape and the size of the insulating gasket 24 can be made according to the size of the shielding box 21, so that the mounting requirement can be met, and the size is not limited herein.

Optionally, the inner wall of the shielding box 21, or the coil 22 and the feedthrough capacitor assembly 23 may be coated with a high-temperature and high-pressure resistant insulating material of a certain thickness, so as to safely protect the arcing discharge phenomenon in the shielding box 21, thereby achieving multi-dimensional insulation and reducing the requirement for the safety distance between the coil 22 and the shielding box 21.

Therefore, it is different from the prior art that the magnetron filtering component 20 provided by the embodiment includes the shielding box 21, the coil 22, the feedthrough capacitor component 23 and the insulating liner 24, and the insulating liner disposed on the inner top wall, the inner bottom wall and the inner side wall of the shielding box 21 is utilized to insulate the shielding box 21 from multiple dimensions, so that on the basis of ensuring that the discharge ignition phenomenon cannot occur in the shielding box 21, the requirement of the safe distance between the coil 22 and the feedthrough capacitor component 23 and the shielding box 21 is reduced, the telescopic freedom degree of the shielding box 21 is increased, the volume of the shielding box 21 can be reduced, and finally, the volume of the magnetron is reduced.

Referring to fig. 5, fig. 5 is a schematic structural diagram of another embodiment of the magnetron filter assembly provided in the present application, and as shown in fig. 5, the magnetron filter assembly 50 provided in the present embodiment includes a shielding box 51, a feedthrough capacitor assembly 52, an insulating spacer 53, and a consumption medium 54, and further includes a cathode terminal 55 disposed at the bottom of the shielding box 51, specifically, the cathode terminal 55 of the magnetron is disposed at the bottom of the shielding box 51 in a penetrating manner, and one end of the cathode terminal 55 is connected to a cathode (not shown) of the magnetron.

The feedthrough capacitor assembly 52 is arranged on the side wall of the shielding box 51 in a penetrating manner, the feedthrough capacitor assembly 52 comprises a lead wire 521 led out into the shielding box 51, and the lead wire 521 is connected with the other end of the cathode terminal 55; insulating gaskets 53 are provided on the inner top wall, inner bottom wall and inner side wall of the shield case 51; the consumption medium 54 is sleeved on the cathode terminal 55, and the consumption medium 54 is used for consuming the electromagnetic waves led out along the cathode terminal 55.

Alternatively, the expendable mediums 54 may be a ferrite material composed of a niczn-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 an auxiliary component.

In other embodiments, the dissipative medium 54 can be insulating, highly permeable, and magnetically lossy materials of various materials. Moreover, the consumable medium 54 may be annular or cylindrical, and the shape of the consumable medium 54 may be adjusted in length and width accordingly. The consumable medium 54 of the present embodiment is not limited to the above-described example as long as it can consume the electromagnetic waves in the shield case 51.

It is understood that the space occupancy of the dissipative medium 54 and the feedthrough capacitor assembly 52 in the magnetron filter assembly 50 provided in the present embodiment can be set as small as possible under the condition that certain filter conditions are satisfied, so that the volume of the shield case 51 of the magnetron can be reduced accordingly. For example, in order to reduce the volume of the shield case 51, the dissipative medium 54 having a large ability to absorb electromagnetic waves may be selected.

In a practical scenario, when the feedthrough capacitor assembly 52 is used for power supply, the filament in the magnetron emits thermal electrons at about 2000K, the thermal electrons rotate in the action space, so as to generate an electric field of about 2450MHZ, the thermal electrons become harmonic waves under the action of the electric field and the magnetic field in the action space, and the harmonic waves are emitted to the outside through the antenna, not only the fundamental wave for cooking but also high-frequency harmonic waves with integral multiple of the fundamental wave frequency are generated in the action space, for the high-frequency harmonic waves, usually through the cathode terminal 55 connected to the cathode of the magnetron, and the radiation is performed to the outside space through the consumption medium 54, after the material (such as ceramic) originally sleeved on the cathode terminal 55 is replaced by the consumption medium 54, the consumption medium 54 corresponds to a cathode insulation support column, that is to add a low pass filter to the cathode terminal 55, the low-pass filter can inhibit the interference of high-frequency electromagnetic waves led out from the cathode terminal 55, and meanwhile, the ferrite material can play a role in shielding consumption due to the property of the material, so that the component of high-frequency interference penetrating the consumption medium 54 to radiate to the space is reduced, the effect of filtering from the source is achieved, and the filtering effect is more stable.

In addition, the consumption medium 54 made of ferrite material is adopted, and the consumption medium 54 serves as a part of filter, so that the requirement of high-frequency interference suppression of the original magnetron filter assembly is reduced, and the parameter selection of the magnetron filter assembly 50 has greater freedom, for example, in the embodiment, the normal level filter processing can be performed without arranging a coil, and the volume of the shielding box 51 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, the phenomenon that the coil and the shielding box 51 are subjected to discharge ignition is avoided, and certain safety guarantee is provided; moreover, due to the existence of the insulating gasket 53, the insulating gasket 53 is arranged on the inner wall of the shielding box 51 from multiple direction dimensions, so that the phenomenon of discharge ignition between the coil or the feedthrough capacitor assembly and the shielding box 51 can be further avoided, the volume of the whole shielding box 51 can be further reduced on the basis of eliminating the coil to reduce the volume of the shielding box 51, and the volume of the magnetron is reduced.

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 a hollow section and a core section can be avoided, and the process procedure is simplified.

Referring to fig. 6, fig. 6 is a schematic structural diagram of a magnetron filter assembly 60 according to another embodiment of the present invention, as shown in fig. 6, the magnetron filter assembly 60 according to the present embodiment includes a shielding box 61, a coil 62, a feedthrough capacitor assembly 63, an insulating liner 64, and a dissipative medium 65, and further includes a cathode terminal 66 disposed at the bottom of the shielding box 61, specifically, the cathode terminal 66 of the magnetron is disposed at the bottom of the shielding box 61, and one end of the cathode terminal 66 is connected to a cathode (not shown) of the magnetron.

Wherein, the coil 62 is arranged in the shielding box 61, and one end of the coil 62 is connected with the cathode terminal 66; the feedthrough capacitor assembly 63 is disposed through a side wall of the shield case 61, the feedthrough capacitor assembly 63 includes a lead line 631 led into the shield case 61, and the lead line 631 is connected to the other end of the coil 62; the consumption medium 65 is sleeved on the cathode terminal 66 and is used for consuming the electromagnetic waves led out along the cathode terminal 66.

Alternatively, the cavity of the shielding box 61 may be divided into a first cavity 611 and a second cavity 612 based on the penetrating position of the cathode terminal 66 in the shielding box 61, wherein the first cavity 611 is disposed near the feedthrough capacitor assembly 63, the second cavity 612 is disposed far from the feedthrough capacitor assembly 63, and the coil 62 is disposed in the first cavity 611.

In one embodiment, for dividing the cavity in the shielding box 61, the shielding box 61 may be divided into two cavities, for example, two rectangular parallelepiped cavities, by using the penetrating position of the cathode terminal 66 in the shielding box 61 and a plane parallel to the sidewall of the shielding box 61 through which the feedthrough capacitor assembly 63 penetrates.

In this embodiment, the coil 62 is limited in the first cavity 611 of the shielding box 61, so that the coil 62 and the consumable medium 65 are both located in the first cavity 611, and the volume of the shielding box 61 can be reduced by reducing the volume of the second cavity 612, that is, the volume of the shielding box 61 on the side of the consumable medium 65 away from the feedthrough capacitor assembly 63 is reduced, thereby reducing the space occupancy of the magnetron filter assembly 30 to a certain extent.

Therefore, compared to the prior art, when the magnetron filtering assembly 60 of the embodiment limits the coil 62 to be disposed in the first cavity 611 of the shielding box 61, that is, the number of turns of the coil 62 is reduced, the filtering effect of the coil 62 and the feedthrough capacitor assembly 63 will be reduced appropriately. However, due to the consumption medium 65 sleeved outside the cathode terminal 66, the consumption medium 65 made of ferrite material is equivalent to adding a low-pass filter to the cathode terminal 66, which can suppress and consume the generated electromagnetic wave at the root, and reduce the component of the high-frequency interference radiating to the space through the consumption medium 65, thereby ensuring the filtering capability of the whole magnetron filtering component 60 to be stable, and reducing the volume of the shielding box 61. The volume of the whole shield case 61 can be further reduced by the insulating spacer 64, thereby reducing the volume of the magnetron.

It should be noted that, a person skilled in the art or a manufacturer may determine the space occupancy of the coil 62, the feedthrough capacitor assembly 63, and the consumable medium 65 according to actual conditions, and will not be described herein too much.

In other embodiments, as shown in fig. 7, a dissipative medium 65 may be disposed on the outgoing line 631 of the feedthrough capacitor assembly 63, where the dissipative medium 65 can absorb the electromagnetic waves propagated from the cathode terminal 66 into the shield case 61, so that the presence of the dissipative medium 65 can reduce the number of turns of the coil 62 to some extent, and thus can reduce the volume of the shield case 61, and finally reduce the volume of the magnetron.

Further, in this embodiment, based on the conventional magnetron structure, the coil 62 is replaced by a hollow section from the combination of a core section and a hollow section, or replaced by a magnetic core section, that is, the coil 62 in this embodiment, because only the hollow section is reserved, the inter-turn distances of the coils are the same, the processing process can be simpler, and the consistency is better.

Similarly, the shielding box 61 may be divided into a first cavity 611 and a second cavity 612 based on the penetrating position of the cathode terminal 66 in the shielding box 61, once the positions of the cathode terminal 66 and the feedthrough capacitor assembly 63 are determined, the coil 62 is located in the cavity close to the feedthrough capacitor assembly 63, and the number of turns of the coil 62 can be determined under the condition that the turn-to-turn distance of every two turns of the coil 62 is fixed, so that the space occupation rate of the coil 62 in the shielding box 61 can be changed by changing the position of the cathode terminal 66, for example, by shortening the distance between the cathode terminal 66 and the lead-out wire 631 of the feedthrough capacitor assembly 63, the occupied position space of the coil 62 in the shielding box 61 is reduced, that is, the volume of the first cavity 611 is reduced, so that the volume of the whole shielding box 61 is further reduced on the basis of the volume reduction of the second cavity 612.

Optionally, the feedthrough capacitor assembly 63 includes an inner housing 632 and an outer housing 633, the inner housing 632 is disposed in the shielding box 61 to form a first accommodating chamber, and the outer housing 633 is disposed outside the shielding box 61 to form a second accommodating chamber. The consumable medium 65 is at least partially embedded in the inner housing 632, that is, the consumable medium 65 is at least partially located in the first accommodating cavity, and specifically, at least a portion of an outer wall of the consumable medium 65 is attached to at least a portion of an inner wall of the inner housing 632. At least part of the consumable media 65 is secured within the first receiving cavity, for example, by an interference fit or welding. Therefore, in this embodiment, by disposing at least part of the consumption medium 65 in the first accommodation cavity of the inner housing 632, the feedthrough capacitor assembly 63 overlaps at least part of the consumption medium 65, the space occupancy of the coil 62, the feedthrough capacitor assembly 63, and the consumption medium 65 in the shield case 61 can be further reduced, and the volume of the shield case 61 can be further reduced. And because of the existence of the insulating liner 64, can further avoid the phenomenon that the coil 62 or pierce through the electric capacity assembly 63 and shielding box 61 produce the spark of discharging, can reduce the volume of shielding box 61 on the basis of reducing the number of turns of coil 62 and reducing the volume of shielding box 61, and then further reduce the volume of whole shielding box 61, thus has reduced the volume of magnetron.

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 82 is used for restraining and consuming high-frequency electromagnetic waves generated by the magnetron through an LCL resonant circuit formed by the through capacitor component and a consumption medium sleeved on the cathode terminal, so that filtering can be realized without arranging a coil in the magnetron filtering component 82, and when the volume of a shielding box is set, the problem that the distance between the coil and the shielding box needs to be ensured because the phenomenon of discharging and igniting can occur to the coil and the shielding box is not needed to be considered, and further 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.

Claims (10)

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 coil is arranged in the shielding box, and one end of the 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 a lead-out wire led out into the shielding box, and the lead-out wire is connected with the other end of the coil;

and the insulating gasket is arranged on the inner top wall, the inner bottom wall and the inner side wall of the shielding box.

2. The magnetron filtering assembly of claim 1,

the shielding box comprises a shielding box body and a shielding box cover body, wherein the shielding box body comprises a bottom wall and a side wall;

the insulating gasket includes:

the first insulating gasket is arranged at the bottom of the shielding box body;

and the second insulating gasket is arranged corresponding to the side wall of the shielding box body and the shielding box cover body.

3. The magnetron filtering assembly of claim 2,

the second insulating pad includes:

a top surface;

the first side surface, the second side surface and the third side surface are connected in sequence, and the first side surface, the second side surface and the third side surface are connected with the top surface;

the top surface is arranged corresponding to the shielding box cover body, and a gap between the first side surface and the third side surface corresponds to a side wall through which the feedthrough capacitor assembly penetrates.

4. The magnetron filtering assembly of claim 2,

the first insulating gasket and the side wall of the shielding box body are spaced by a preset distance, and the second insulating gasket is clamped between the first insulating gasket and the side wall of the shielding box body.

5. The magnetron filtering assembly of claim 2,

the cathode terminal is arranged in a ceramic column of the magnetron, and the ceramic column penetrates through the bottom of the shielding box;

a through hole is formed in the first insulating liner, and the ceramic column is arranged in the through hole.

6. The magnetron filtering assembly of claim 1,

and one side of the insulating gasket, which is close to the feedthrough capacitor assembly, is provided with a plurality of air holes for heat dissipation in the shielding box.

7. The magnetron filtering assembly of claim 1,

the coil includes:

one end of the hollow section coil is connected with the other end of the cathode terminal;

and one end of the core section coil is connected with the other end of the hollow section coil, and the other end of the core section coil is connected with the outgoing line.

8. The magnetron filtering assembly of claim 1,

the thickness of the insulating gasket is 1-3 mm.

9. A magnetron, comprising:

a magnetron main body;

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.

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