CN108376634B

CN108376634B - Magnetron and cooking device with microwave function

Info

Publication number: CN108376634B
Application number: CN201810059010.0A
Authority: CN
Inventors: 刘志勇
Original assignee: Guangdong Witol Vacuum Electronic Manufacture Co Ltd
Current assignee: Guangdong Witol Vacuum Electronic Manufacture Co Ltd
Priority date: 2018-01-22
Filing date: 2018-01-22
Publication date: 2020-07-14
Anticipated expiration: 2038-01-22
Also published as: CN108376634A

Abstract

The invention relates to the field of electric vacuum devices for generating microwaves, and discloses a magnetron and a cooker with the microwave function, wherein the magnetron (1) comprises a mounting shell (10), a tube core (11) arranged in the mounting shell and an annular sealing component (15); a first wall (101) of the mounting shell is provided with a hole (100); the die includes a die housing (110) having one end extending to an aperture; the sealing assembly is arranged in the hole around the tube core shell and can seal the hole, and the sealing assembly comprises a gasket (151) and a gasket (150) in an annular shape; the spacer includes an annular support plate (152) supporting the washer and a stopper portion provided to the annular support plate and capable of restricting the washer from moving in a direction perpendicular to the center axis of the hole. The sealing assembly arranged in the magnetron can better seal the hole gap, so that the microwave is not easy to leak. The magnetron is applied to a cooking device with a microwave function, so that the use safety of the cooking device can be greatly improved.

Description

Magnetron and cooking device with microwave function

Technical Field

The invention relates to the technical field of electric vacuum devices for generating microwaves, in particular to a magnetron and a cooker with a microwave function.

Background

A magnetron is an electric vacuum device used to generate microwave energy. Magnetrons are widely used as microwave generation sources for microwave devices such as household microwave ovens and industrial microwave heating devices because of their high oscillation efficiency and high microwave output power.

The conventional magnetron includes a mounting case, a core in the mounting case, and a heat dissipation structure disposed between the mounting case and the core. The tube core has a cylindrical central cathode (electron source) inside its outer envelope and is placed inside a cylindrical anode, where the electrons are attracted by the electrostatic field and flow to the anode. A steady magnetic field along the axis of the tube core causes the electrons to deviate from their radial path, rotating about the cathode, producing oscillations in the microwave frequency.

After the magnetron is applied to the related microwave equipment, a corresponding microwave leakage prevention structure is required to prevent the generated microwave from leaking. The magnetron is applied to a household microwave oven as an example, a round hole is formed in the mounting shell (the output part of the magnetron can be hermetically connected with the tube core through the round hole), and a sealing structure capable of sealing the gap of the hole is arranged in the round hole, so that the mounting shell of the magnetron can be in close contact with a wave guide port of the microwave oven through the sealing structure, and the purpose of preventing microwave leakage is achieved. The sealing structure comprises an annular gasket hermetically connected with the wall of the round hole and an annular gasket supporting the gasket, wherein the gasket can be prepared from an elastic material. It should be noted that, in the existing sealing structure, the gasket only plays a supporting role, and during installation, the gasket is placed on the gasket, and the central axis among the circular hole, the gasket and the gasket is centered by adopting an assembling clamp so as to ensure the sealing performance of the sealing structure.

However, when the gasket is installed, the gasket is often deformed in the radial direction, which causes the gasket to be displaced when centering, so that the gasket deviates from the original sealing position, a gap is formed between the sealing structure and the circular hole, microwave leakage is easy to occur, and safety accidents are easily caused.

Disclosure of Invention

The invention aims to solve the problem that in the prior art, a gap is easy to generate between a sealing structure arranged in a magnetron and a hole provided with the sealing structure, so that microwaves are easy to leak, and provides the magnetron.

In order to achieve the above object, an aspect of the present invention provides a magnetron including:

the mounting shell is provided with a hole on a first wall;

a die disposed within the mounting housing, the die including a die casing, one end of the die casing extending to the aperture; and

a seal assembly in the form of a ring disposed in the aperture around the die housing and capable of sealing the aperture, the seal assembly including a gasket and a gasket in the form of a ring; wherein the content of the first and second substances,

the gasket includes an annular support plate supporting the gasket and a stopper portion provided to the annular support plate and capable of restricting the gasket from moving in a direction perpendicular to the central axis of the hole.

Preferably, the spacing portion including encircle set up in the first spacing muscle of the hole of cyclic annular backup pad and with the spacing muscle of second that first spacing muscle interval set up, the packing ring location is in between first spacing muscle and the spacing muscle of second.

Preferably, the first limiting rib is plate-shaped and forms an included angle with the annular supporting plate; and/or the first limiting rib and the annular supporting plate are formed into a whole.

Preferably, the second limiting rib is plate-shaped and forms an included angle with the annular supporting plate; and/or the second limiting rib and the annular support plate are formed into a whole.

Preferably, the annular support plate is bent to form the second limiting rib and a bent opening facing into the mounting shell.

Preferably, the second limiting rib is a hood-shaped bump structure, and an opening of the bump structure faces the inside of the mounting shell.

Preferably, the spacer includes a first extension portion connected to the second stopper rib and extending in a direction perpendicular to the central axis of the hole, the first extension portion being capable of contacting an inner wall of the first wall of the mounting case.

Preferably, the gasket comprises a bending part connected with the first limiting rib and bent towards the inside of the mounting shell, and a second extending part connected with the bending part and extending towards the inside of the mounting shell, wherein the second extending part is in close contact with the outer wall of the tube core outer shell.

Preferably, the hole is stepped, wherein the diameter of the hole near the outside of the mounting shell is smaller than the diameter of the hole near the inside of the mounting shell;

the outer peripheral edges of the washers are provided with step-shaped structures capable of being matched with the walls of the holes, and the second limiting ribs can be embedded into the washers and gaps between the holes.

In the above technical solution, by providing the sealing assembly in the hole opened in the first wall of the mounting housing, and by providing the sealing assembly with the gasket and the annular gasket, and by providing the gasket with the structure including the annular support plate supporting the gasket and the stopper portion provided in the annular support plate and capable of restricting the gasket from moving in the direction perpendicular to the central axis of the hole, the gasket is not easily moved or deformed in the direction perpendicular to the central axis of the hole, even after the sealing assembly is repeatedly installed for many times, the gasket is not easily moved or deformed in the direction perpendicular to the central axis of the hole, so that when the sealing assembly is installed in the hole by the action of the relevant jig, the central axes of the hole, the gasket, and the hole can substantially completely coincide, thereby enabling the hole gap to be sealed well, the phenomenon of microwave leakage is greatly reduced, so that the tightness between the magnetron and a wave guide port of microwave equipment such as a household microwave oven is better, and the use safety of the magnetron is improved.

A second aspect of the present invention provides a cooking apparatus having a microwave function in which the magnetron provided by the present invention is installed. The magnetron provided by the invention is arranged in the cooking device with microwave function, so that the sealing performance of the magnetron at the installation position can be greatly improved, the microwave is not easy to leak, and the use safety of the cooking device with microwave function is improved.

Drawings

FIG. 1 is a schematic cross-sectional view of a magnetron according to a preferred embodiment of the invention;

FIG. 2 is a view showing a structure in which a sealing member is installed in a hole in the magnetron shown in FIG. 1, in which a view showing installation of a partial structure of the sealing member is shown;

FIG. 3 is a view showing a structure in which a sealing member is installed in a hole in a magnetron according to another preferred embodiment of the present invention, in which a view showing installation of a partial structure of the sealing member is shown;

FIG. 4 is a view illustrating a structure in which a sealing member is installed in a hole in a magnetron according to another preferred embodiment of the present invention, wherein a view illustrating installation of a partial structure of the sealing member is shown;

FIG. 5 is a schematic view of the overall construction of a gasket in the seal assembly of the magnetron of FIG. 1;

FIG. 6 is a schematic cross-sectional view of a portion of the gasket shown in FIG. 5;

FIG. 7 is a schematic view of the overall construction of a gasket in the seal assembly of the magnetron shown in FIG. 3;

FIG. 8 is a schematic cross-sectional view of a portion of the gasket shown in FIG. 7;

FIG. 9 is a schematic view of the overall construction of a gasket in the seal assembly of the magnetron shown in FIG. 4;

fig. 10 is a sectional view schematically showing a part of the structure of the gasket shown in fig. 9.

Description of the reference numerals

1-a magnetron; 10-mounting a housing; 100-holes; 101-a first wall; 102-a second wall; 11-a die; 110-a die housing; 111-an anode; 112-a cathode; 113-an antenna; 114-upper pole; 115-lower pole; 116-an anode cylinder; 117-a first extension shell; 118-a second extension shell; 12-a heat dissipation structure; 13-an output section; 14-a power input; 15-a sealing assembly; 150-a gasket; 151-shim; 152-annular support plate; 153-a first spacing rib; 154-second limiting rib; 155-bending an opening; 156-an opening; 157-a first extension; 158-a bend; 159 — a second extension; 16-a first magnet; 17-a second magnet.

Detailed Description

In the present invention, the use of directional terms such as "upper, lower, left and right" in the absence of a contrary intention, generally means that the terms "inside and outside" refer to the inside and outside of the component profile, both in conjunction with the orientation shown in the drawings and the orientation in actual use.

The present invention provides a magnetron, and as shown in connection with figures 1 and 2, a magnetron 1 comprises a mounting cup 10, a tubular core 11 and a sealing assembly 15 in the form of a ring. Wherein, a hole 100 is opened on a first wall 101 of the mounting case 10, the die 11 is disposed in the mounting case 10, and the die 11 includes a die housing 110, specifically, as shown in fig. 1, the die housing 110 may include an anode cylinder 116 with two open ends formed thereon, and a first extension case 117 and a second extension case 118 hermetically connected to the two open ends, an end of the first extension case 117 away from the anode cylinder 116 may extend to the hole 100, an end of the second extension case 118 away from the anode cylinder 116 may extend to a second wall 102 of the mounting case 10, and the second wall 102 is opposite to the first wall 101, so that an end of the die housing 110, that is, an end of the first extension case 117 away from the anode cylinder 116, may extend to the hole 100, and another end of the die housing 110, that is, an end of the second extension case 118 away from the anode cylinder 116, may extend to the second wall 102; a seal assembly 15 is disposed in the aperture 100 around the die housing 110 and is capable of sealing the aperture 100, that is, the seal assembly 15 is capable of sealing the aperture gap, the seal assembly 15 including a gasket 151 and a gasket 150 in the form of a ring; the washer 151 includes an annular support plate 152 supporting the washer 150, and a stopper provided to the annular support plate 152 and capable of restricting the movement of the washer 150 in a direction perpendicular to the central axis of the hole 100. By providing the seal assembly 15 in the hole 100 opened in the first wall 101 of the mounting case 10, and by providing the seal assembly 15 with the gasket 151 and the washer 150 in a ring shape, while providing the gasket 151 with a structure including the ring-shaped support plate 152 supporting the gasket 150 and the stopper portion provided to the ring-shaped support plate 152 and capable of restricting the movement of the gasket 150 in the direction perpendicular to the central axis of the hole 100, the gasket 150 is not easily moved or deformed in the direction perpendicular to the central axis of the hole 100, even after the seal assembly 15 is repeatedly installed for a plurality of times, the gasket 150 is not easily moved or deformed in the direction perpendicular to the central axis of the hole 100, so that the central axes of the hole 100, the gasket 150, and the gasket 151 can substantially completely coincide when the seal assembly 15 is installed in the hole 100 by the action of the relevant jig, thereby allowing the hole gap to be well sealed, the phenomenon of microwave leakage is greatly reduced, thereby also making the tightness between the magnetron 1 and the waveguide port of a microwave device, such as a household microwave oven, better. Among them, the hole 100 may preferably be circular; the gasket 150 may be stamped and formed from wire, it being understood that the gasket 150 is preferably a resilient member to further enhance sealing. It will be appreciated that the washer 150 may be embedded in the stop.

In addition, as shown in fig. 1, a heat dissipation structure 12 may be provided between the mounting case 10 and the die 11; a pair of anodes 111 arranged oppositely can be installed in the anode cylinder 116; an antenna 113 can be connected to one of the anodes 111, and the antenna 113 extends out of the mounting case 10; a cathode 112 may be disposed between the pair of anodes 111, the cathode 112 preferably comprising a side leg assembly, a central leg assembly with a shielding cap, and a filament disposed helically around the central leg assembly; magnetic pole members forming a magnetic circuit may be disposed within the anode cylinder 116, and the magnetic pole members may include an upper magnetic pole 114 and a lower magnetic pole 115, and the upper magnetic pole 114 may be disposed at an opening at the top of the anode cylinder 116 and the lower magnetic pole 115 may be disposed at an opening at the bottom of the anode cylinder 116, as viewed from the orientation shown in fig. 1. Further, the output portion 13 may be provided outside the mounting case 10, and the output portion 13 may be hermetically connected to the first extension case 117, i.e., one end of the die case 110, through the hole 100 opened in the mounting case 10, and it is understood that the antenna 113 extends into the output portion 13. The power input portion 14 hermetically connected to the second extension case 118 may be further provided outside the mounting case 10. As shown in fig. 1, a first magnet 16 surrounding a first extension case 117 may be disposed at one side of the hole 100 within the mounting case 10, and a second magnet 17 surrounding a second extension case 118 may be further disposed at the outside of the second extension case 118, wherein the second magnet 17 is disposed within the mounting case 10.

As shown in fig. 2, 3 and 4, the stopper portion may include a first stopper rib 153 disposed around the inner hole of the annular support plate 152 and a second stopper rib 154 disposed at a distance from the first stopper rib 153, so that the gasket 150 can be positioned between the first stopper rib 153 and the second stopper rib 154, so that the gasket 150 is not easily moved or deformed in a direction perpendicular to the central axis of the hole 100.

As shown in fig. 6, 8 and 10, the first limiting rib 153 may be plate-shaped and has an included angle with the annular supporting plate 152, so that the first limiting rib 153 can better position the gasket 150, and the gasket 150 is stably limited between the first limiting rib 153 and the second limiting rib 154. The first plate-shaped limiting rib 153 may be vertically disposed on the annular supporting plate 152. In addition, the first stopper rib 153 may be formed as a single body with the annular support plate 152, which not only facilitates the preparation of the gasket 151, but also makes the structure of the gasket 151 more robust.

As shown in fig. 2, 5 and 6, the second limiting rib 154 may preferably be plate-shaped and arranged at an angle to the annular supporting plate 152, so that the second limiting rib 154 can better position the gasket 150, and the gasket 150 is more stably limited between the first limiting rib 153 and the second limiting rib 154. In addition, the second stopper rib 154 may be formed as a single body with the annular support plate 152, which not only facilitates the preparation of the gasket 151, but also makes the structure of the gasket 151 more robust. It is understood that the second stopper rib 154 having a plate shape may surround the second stopper rib 154.

As shown in fig. 3, 7 and 8 in combination, the annular support plate 152 may be bent to form second retention ribs 154 and a bent opening 155 into the mounting shell 10. By providing the second retention rib 154 with a bent-like configuration, the second retention rib 154 is able to deform in a direction perpendicular to the central axis of the bore 100 to facilitate positioning of the gasket 150 and installation of the seal assembly 15 into the bore 100. As shown in fig. 3, for example, the second stopper rib 154 having a bent-like structure can elastically seal the gap between the gasket 150 and the hole 100, thereby further improving sealability.

Additionally, as shown in fig. 4, 9 and 10 in combination, the second retention rib 154 may be a hood-like, convex point structure with an opening 156 facing into the mounting housing 10, such that the second retention rib 154 may deform in a direction perpendicular to the central axis of the bore 100 to better position the gasket 150 and facilitate installation of the seal assembly 15 into the bore 100. As shown in fig. 4, for example, the second stopper rib 154 having a hood-like convex point structure can elastically seal the gap between the gasket 150 and the hole 100, thereby further improving the sealing property. In addition, a plurality of second limiting ribs 154 having a cap-shaped protruding point structure may be disposed on the annular supporting plate 152 to more firmly limit the gasket 150 between the first limiting ribs 153 and the second limiting ribs 154. It can be appreciated that a plurality of second limiting ribs 154 in a cap-like bump structure are spaced apart.

In addition, the height of the second stopper rib 154 may preferably be not more than 1mm, which ensures the stopper function of the second stopper rib 154 and facilitates the use of the gasket 151.

As shown in fig. 3, 4, 7, 8, 9 and 10 in combination, the spacer 151 may include a first extension portion 157 connected to the second stopper rib 154 and extending in a direction perpendicular to the central axis of the hole 100, the first extension portion 157 being capable of contacting the inner wall of the first wall 101 of the mounting case 10. By providing the first extending portion 157, not only the sealing performance of the sealing assembly 15 can be further improved, but also the sealing assembly 15 and the hole 100 can be more stably installed together. It will be appreciated that the first extension 157 corresponds to the provision of an annular extending wall on the second retention rib 154 surrounding the first retention rib 153, thereby further improving the seal between the seal assembly 15 and the wall of the bore 100 and providing a more secure mounting of the seal assembly 15 to the wall of the mounting housing 10.

In order to improve the sealing performance between the sealing assembly 15 and the die case 110, as shown in fig. 1, 6, 8 and 10, the gasket 151 may include a bent portion 158 connected to the first stopper rib 153 and bent toward the inside of the mounting case 10, and a second extending portion 159 connected to the bent portion 158 and extending toward the inside of the mounting case 10, the second extending portion 159 being in close contact with the outer wall of the die case 110, so that the bending portion 158 and the second extending portion 159 cooperate to provide an elastic sealing performance between the sealing assembly 15 and the die case 110, further improving the sealing performance of the sealing assembly 15, so that microwaves cannot substantially leak from the hole gap, and at the same time, the sealing assembly 15 may be more stably supported on the first extending portion 117 of the die case 110 by the cooperation of the bent portion 158 and the second extending portion 159.

As shown in fig. 2, 3 and 4 in combination, the hole 100 is stepped, wherein the diameter of the hole 100 near the outside of the mounting case 10 is smaller than the diameter of the hole 100 near the inside of the mounting case 10; the gasket 150 is provided at its outer periphery with a stepped structure capable of cooperating with the wall of the hole 100, and the sealing between the seal assembly 15 and the wall of the hole 100 is further improved by the cooperation between the two stepped structures. In addition, the second stopper rib 154 can be inserted into the gap between the washer 150 and the hole 100. In installing the seal assembly 15, the gasket 150 may be first positioned between the stopper portions, and then the seal assembly 15 may be installed in the hole 100 by the associated jig, specifically, the center axes of the seal assembly 15 and the hole 100 may be made to coincide with each other, at which time the second stopper rib 154 can be fitted in the gap between the gasket 150 and the hole 100.

The invention also provides a cooker with a microwave function, and the magnetron 1 provided by the invention is arranged in the cooker with the microwave function. Because the magnetron 1 provided by the invention is arranged in the cooking device with the microwave function, the sealing performance of the magnetron 1 at the installation position can be greatly improved, so that the microwave is not easy to leak, and the use safety of the cooking device with the microwave function is improved. Among them, the microwave-enabled cookers may include household microwave ovens and industrial microwave equipment.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, numerous simple modifications can be made to the technical solution of the invention, including combinations of the individual specific technical features in any suitable way. The invention is not described in detail in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.

Claims

1. A magnetron, characterized in that the magnetron (1) comprises:

the mounting structure comprises a mounting shell (10), wherein a first wall (101) of the mounting shell (10) is provided with a hole (100);

a die (11), the die (11) being disposed within the mounting shell (10), the die (11) including a die housing (110), one end of the die housing (110) extending to the aperture (100); and

a ring-shaped seal assembly (15), the seal assembly (15) disposed in the aperture (100) around the die housing (110) and capable of sealing the aperture (100), the seal assembly (15) including a gasket (151) and a ring-shaped gasket (150); wherein the content of the first and second substances,

the gasket (151) comprises an annular support plate (152) supporting the gasket (150) and a limiting part which is arranged on the annular support plate (152) and can limit the gasket (150) to move along a direction perpendicular to the central axis of the hole (100);

the limiting part comprises a first limiting rib (153) arranged around an inner hole of the annular supporting plate (152) and a second limiting rib (154) arranged at intervals with the first limiting rib (153), and the gasket (150) is positioned between the first limiting rib (153) and the second limiting rib (154);

the gasket (151) comprises a bending part (158) connected with the first limiting rib (153) and bent towards the inside of the mounting shell (10) and a second extending part (159) connected with the bending part (158) and extending towards the inside of the mounting shell (10), the second extending part (159) is in close contact with the outer wall of the tube core outer shell (110), and the second extending part (159) can realize elastic sealing with the tube core outer shell (110).

2. The magnetron according to claim 1, wherein the first limiting rib (153) is plate-shaped and arranged at an angle with the annular support plate (152); and/or the first stopper rib (153) is formed in one piece with the annular support plate (152).

3. The magnetron according to claim 1, wherein the second limiting rib (154) is plate-shaped and arranged at an angle to the annular support plate (152); and/or the second retention rib (154) is formed in one piece with the annular support plate (152).

4. The magnetron of claim 1, wherein the annular support plate (152) is bent to form the second stopper rib (154) and a bent opening (155) into the mounting shell (10).

5. The magnetron of claim 1, wherein the second retention rib (154) is a hood-like bump structure having an opening (156) facing into the mounting shell (10).

6. The magnetron of claim 1, wherein the gasket (151) includes a first extension portion (157) connected to the second stopper rib (154) and extending in a direction perpendicular to a central axis of the hole (100), the first extension portion (157) being contactable with an inner wall of the first wall (101) of the mounting case (10).

7. Magnetron according to any of claims 1 to 6, characterized in that the hole (100) is stepped, wherein the diameter of the hole (100) close to the outside of the mounting shell (10) is smaller than the diameter of the hole (100) close to the inside of the mounting shell (10);

the outer periphery of the gasket (150) is provided with a step-shaped structure capable of being matched with the wall of the hole (100), and the second limiting rib (154) can be embedded in a gap between the gasket (150) and the hole (100).

8. A cooking appliance with microwave function, characterized in that a magnetron (1) according to any one of claims 1 to 7 is installed in the cooking appliance with microwave function.