CN216619915U

CN216619915U - Waveguide tube fixed mounting device and microwave oven with same

Info

Publication number: CN216619915U
Application number: CN202121928410.4U
Authority: CN
Inventors: 吕挺; 陈锡雁; 梁郁庆; 唐明辉
Original assignee: Zhejiang Tianxi Kitchen Appliance Co Ltd
Current assignee: Zhejiang Tianxi Kitchen Appliance Co Ltd
Priority date: 2021-08-17
Filing date: 2021-08-17
Publication date: 2022-05-27
Anticipated expiration: 2031-08-17

Abstract

The utility model provides a waveguide tube fixing and mounting device and a microwave oven with the same, wherein the waveguide tube comprises a waveguide tube body in a hollow tubular structure and a magnetron fixing support fixedly connected with one end of the waveguide tube body, the waveguide tube is fixedly mounted on a microwave oven cavity and positioned between the microwave oven cavity and a microwave oven shell, and the waveguide tube is provided with a waveguide tube riveting hole for enabling the waveguide tube and the microwave oven cavity to be connected together in a riveting and fixing mode. The waveguide tube fixing and mounting device provided by the utility model can firmly connect the waveguide tubes together, and has the technical effects of preventing the waveguide tubes from falling off, improving the safety of the microwave oven and prolonging the service life of the microwave oven.

Description

Waveguide tube fixed mounting device and microwave oven with same

Technical Field

The utility model relates to a waveguide tube fixing and mounting device and a microwave oven with the same.

Background

A microwave oven is a common cooking apparatus for cooking or heating food, and the heating principle thereof is that polar molecules in the food are heated by high-speed movement in a microwave field using the high-frequency characteristics of microwaves. The microwave heating system comprises a magnetron, a waveguide and a microwave oven cavity. Specifically, high frequency electromagnetic waves generated from the magnetron are radiated to the inside of the cavity of the microwave oven after passing through the waveguide, thereby heating the food in the cavity.

In the existing microwave oven, the waveguide tube and the microwave oven cavity are often fixedly connected together by welding, for example, a single-spot welding or a multi-spot welding of an energy storage welding machine can be adopted. However, such conventional welding fixing methods have at least the following problems:

1. the stability of the connection between the waveguide tube and the cavity of the microwave oven is not high, and the service life of the microwave oven is short. The condition of rosin joint probably appears between the point when the welding is fixed and the point, and the connection between waveguide pipe and the cavity this moment is unstable, in case take place to collide with will make the waveguide pipe break away from the cavity because of the solder joint pine takes off, and this makes the microwave oven unable by normal input use, probably causes the microwave to leak outward from waveguide pipe to cause the injury for user's health.

2. The traditional fixed connection structure has requirements on metal materials and is low in applicability. In both single spot welding and multi spot welding, the metal materials to which they are applied are limited, and there is a case where welding is not firm due to differences in the metal materials. For example, in the case where an aluminum plate is welded to an aluminum plate, the aluminum plate is welded to an electrolytic plate, or the like, the welding between the metal plates is not firm.

SUMMERY OF THE UTILITY MODEL

In order to solve the above technical problems, an aspect of the present invention provides a waveguide tube fixing and mounting device, wherein a waveguide tube includes a waveguide tube body having a hollow tubular structure and a magnetron fixing bracket fixedly connected to one end of the waveguide tube body, the waveguide tube is mounted between a housing and a cavity of a microwave oven by being riveted to the cavity of the microwave oven, and a waveguide tube riveting hole for realizing the waveguide tube fixing and mounting device is correspondingly formed on a wall surface of the waveguide tube near one side of the cavity of the microwave oven; and both ends of the hollow tubular structure waveguide tube body are respectively provided with an upper bottom surface opening and a lower bottom surface opening, and one of the upper bottom surface opening and the lower bottom surface opening forms a waveguide port on the waveguide tube body for allowing microwaves to pass through and feed into the cavity of the microwave oven. The magnetron fixing bracket is of a sheet structure and is connected with one end of the waveguide tube body in a mode of covering and fixing the magnetron fixing bracket on the upper bottom surface opening or the lower bottom surface opening.

Further, the hollow tubular waveguide body is a frustum-shaped structure with a quadrangular cross section, and has an upper bottom surface, a lower bottom surface and four side surfaces, wherein the upper bottom surface and the lower bottom surface are formed by the upper bottom surface opening and the lower bottom surface opening.

Furthermore, the connecting surfaces between the side surfaces of the waveguide tube body are all curved surfaces with certain radian.

Furthermore, the waveguide tube body is also provided with a waveguide tube positioning hole on the wall surface close to one side of the waveguide opening, and the waveguide tube positioning hole is used for positioning the waveguide tube to a specific installation position on the microwave oven cavity body during installation.

Furthermore, the diameter range of the waveguide riveting hole is 3.0-4.0 mm.

Further, the riveting mode comprises pull riveting or flanging hole type riveting.

Another aspect of the present invention provides a microwave oven having the aforementioned waveguide fixing and mounting device.

The microwave oven is provided with an opening hollow cavity surrounded by a front plate, a rear plate, a top plate and a U-shaped plate, and a microwave inlet is arranged at the position of the U-shaped plate connected with the waveguide tube fixing and mounting device.

Furthermore, the U-shaped plate is provided with a cavity riveting hole and a cavity positioning hole corresponding to the waveguide tube fixing and mounting device, the cavity riveting hole and the cavity positioning hole are both located on the wall surface of the periphery of the microwave inlet, and the shape and size of the opening of the cavity riveting hole are consistent with those of the opening of the waveguide tube riveting hole in the waveguide tube fixing and mounting device.

Further, the shape and size of the microwave inlet are consistent with the cross-sectional shape and size of the waveguide port in the waveguide fixing and mounting device.

Furthermore, an insulating sheet covering the cavity riveting hole and the cavity positioning hole is arranged between the cavity and the waveguide tube fixing and mounting device.

From the above technical solutions, the present invention provides at least the following technical effects:

1. the waveguide tube fixing and mounting device provided by the utility model can firmly connect the waveguide tube and the microwave oven cavity together, is not easy to fall off even if collision occurs in the transportation process, has higher stability compared with the traditional welding and fixing structure, and avoids the damage to the body of a user caused by exposure to the microwave standard exceeding environment.

2. The waveguide tube fixing and mounting device provided by the utility model has higher practicability, and because the fixing mode of riveting connection has no special requirements on metal materials, the process can be realized on microwave oven cavities made of different materials, the manufacture is simple, and the production cost is reduced.

Additional features and advantages of the utility model will be set forth in the description which follows, or may be learned by practice of the utility model.

Drawings

The accompanying drawings are included to provide a further understanding of the claimed subject matter and are incorporated in and constitute a part of this specification, illustrate embodiments of the subject matter and together with the description serve to explain the principles of the subject matter and not to limit the subject matter.

Fig. 1 is a perspective view of a waveguide used in a waveguide fixing and mounting device according to the present invention;

fig. 2 is a perspective exploded view of a microwave oven having a waveguide fixing and mounting device according to the present invention.

Description of reference numerals:

1-a waveguide;

11-a waveguide body; 12-a magnetron fixing support;

11 a-upper bottom surface opening; 11 b-lower bottom surface opening;

13-waveguide port; 14-waveguide tube riveting holes;

15-waveguide tube positioning holes;

2-a microwave oven;

21-a cavity; 22-microwave inlet;

21 a-front panel; 21 b-a back plate;

21 c-top plate; 21 d-U-shaped plate;

23-cavity riveting holes; 24-cavity positioning holes;

3-an insulating sheet.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and examples. It should be understood that the described embodiments are only for illustrating the utility model and are not to be taken as limiting the utility model. And the embodiments given are only a part of the embodiments of the present invention, not all of them. All other embodiments, which can be obtained by a person skilled in the art without any inventive work based on the embodiments of the present invention, are within the scope of the present invention.

It should be noted that the terms "left", "right", "upper", "lower", and the like in the present specification indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, and do not mean that the device or the element of the present invention must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

According to one aspect of the present invention, there is provided a fixed mounting device of a waveguide.

Referring to fig. 1, there is shown a perspective view of a waveguide used in the waveguide fixing and mounting device according to the present invention.

The waveguide 1 is a metal member for guiding microwaves generated by a magnetron (not shown) into a cavity of a microwave oven, and may be a cylindrical structure, a groove-like structure with corners, a frustum-like structure, or a rectangular parallelepiped structure, and has a circular, quasi-circular, or rectangular cross section, and the size of the cross section needs to be specifically determined according to the wavelength of the microwaves. The waveguide tube with the frustum pyramid structure is more convenient to arrange on the cavity of the microwave oven, and the processing technology is simpler, so that the structure is the preferred embodiment of the utility model, and the arrangement mode of the waveguide tube with the frustum pyramid structure is described in detail below with reference to the attached drawings.

According to the present invention, the waveguide 1 is composed of a waveguide body 11 and a magnetron fixing bracket 12 which are fixedly connected together. As shown in fig. 1, the waveguide body 11 is configured as a frustum-shaped structure having two openings at two opposite sides, and has two bottom surfaces, namely, an upper bottom opening 11a and a lower bottom opening 11b, which are referred to as an upper bottom opening and a lower bottom opening for convenience of description, the two bottom openings have similar quadrangle cross-sections (i.e., the upper bottom surface and the lower bottom surface are parallel to each other and have similar shapes, but the area of one bottom surface is smaller than that of the other bottom surface), and four side surfaces of the frustum-shaped structure are isosceles trapezoids, which can be integrally formed by a mold.

It should be known to those skilled in the art that, besides being directly connected together, the four side surfaces of the frustum-shaped structure may be connected together by a curved surface design instead, which not only beautifies the appearance of the waveguide tube, but also prevents users or technicians from being cut by sharp side edges when the waveguide tube is disassembled and assembled, thereby further improving the safety during the assembly process.

The lower bottom opening 11b of the waveguide 1 of the frustum-shaped structure in this embodiment serves as a waveguide port 13 for allowing the microwave generated by a magnetron (not shown) to pass therethrough and to be fed into the cavity of the microwave oven, and the upper bottom opening 11a of the waveguide 1 of the frustum-shaped structure is covered with a magnetron fixing bracket 12 of a sheet structure for mounting and fixing the magnetron (not shown). It should be understood that the foregoing positional relationship is described based on the drawings, and in another embodiment, it is also possible to provide the upper bottom surface opening 11a as the waveguide port 13, cover and fix the magnetron fixing bracket 12 on the lower bottom surface opening 11b and change the arrangement accordingly. The waveguide body 11 may be configured in other shapes as described above, and the present invention is not limited thereto.

The waveguide 1 in this embodiment is installed on the cavity of the microwave oven and is accommodated in the space formed between the cavity of the microwave oven and the housing of the microwave oven, and the waveguide 1 and the cavity of the microwave oven can be fixedly connected by riveting.

It will be appreciated by those skilled in the art that in order to achieve the above-described rivet-type fixing, it is necessary to provide a waveguide riveting hole 14 for performing riveting on the waveguide body 11 accordingly. Specifically, the waveguide staking holes 14 are each provided in a wall surface of the waveguide body 11 on the side close to the waveguide port 13.

In order to facilitate mounting and ensure accuracy in mounting, a waveguide positioning hole 15 for positioning may be further provided on the waveguide body 11. It will be appreciated that the position of the waveguide positioning hole 15 corresponds to a specific positioning point on the cavity of the microwave oven (not shown, determined according to the specific position where the waveguide 1 is actually assembled on the microwave oven). At this time, when the waveguide 1 is installed, if the waveguide positioning hole 15 is aligned with a specific positioning point on the cavity of the microwave oven, it can be ensured that the waveguide 1 is installed at a correct position.

When the sizes of the holes of the waveguide positioning hole 15 and the waveguide riveting hole 14 are set, the convenience of the hole opening and a common riveting method should be considered at the same time. In view of the above, the diameter range of the waveguide positioning hole 15 and the waveguide riveting hole 14 in the present embodiment may preferably be 3.0 to 4.0 mm.

The mounting device for riveting and fixing is very firm, and is not easy to loosen even if the mounting device is collided, so that the waveguide 1 and the cavity of the microwave oven can be tightly and firmly connected together by adopting the mounting device, the stability of each component of the microwave oven is ensured, and the body damage caused by the microwave leakage caused by the loosening of the waveguide by a user is also avoided.

Another aspect of the present invention provides a microwave oven using the aforementioned waveguide fixing and mounting device.

Referring to fig. 2, there is shown a perspective exploded view of a microwave oven having a waveguide fixing and mounting device according to the present invention.

The microwave oven 2 in this embodiment has a cavity 21 and a waveguide 1 mounted on the cavity using the aforementioned mounting means. Generally, the cavity 21 of the microwave oven 2 is a hollow rectangular parallelepiped structure with one side opened and enclosed by a front plate 21a, a rear plate 21b, a top plate 21c and a U-shaped plate 21d, wherein the opening of the front plate 21a is the same size as the opening of the cavity 21, and the waveguide 1 is disposed on the U-shaped plate 21 d.

In order to allow the microwave generated from the magnetron (not shown) to enter the cavity 21 through the waveguide 1, a microwave inlet 22 for allowing the microwave to pass therethrough is provided on the U-shaped plate 21d of the cavity 21. When the opening shape of the microwave inlet 22 is provided, it is necessary to consider the spatial arrangement of the components in the microwave oven 2 and the characteristics of microwave transmission, as well as the specific parameters of the waveguide 1 used, and to obtain as high coupling efficiency as possible to reduce microwave loss. Meanwhile, in order to avoid the leakage of the microwave, the opening size of the microwave inlet 22 should not exceed the size of the cross section of the waveguide port 13. In view of the above, the shape and size of the microwave inlet 22 should be adapted to the shape and size of the cross-section of the waveguide port 13 and preferably the same as the shape and size of the cross-section of the waveguide port 13, rather than smaller than the opening of the cross-section of the waveguide port 13.

The arrangement mode not only can enable the waveguide tube 1 and the microwave oven cavity 21 to form close fit connection, but also can enable microwaves transmitted in the waveguide tube 1 to be fed into the microwave oven cavity 21 through the waveguide port 13 and the microwave inlet 22 as much as possible.

Further, it should be understood by those skilled in the art that the microwave inlet 22 is provided at the same position on the U-shaped plate 21d as the aforementioned position where the waveguide body 11 is coupled to the U-shaped plate 21 d.

The U-shaped plate 21d of the microwave oven is also provided with a cavity riveting hole 23 corresponding to the waveguide riveting hole 14 of the waveguide 1 fixing and mounting device. In addition, the number of the cavity staking holes 23 is preferably two or more in view of stable mounting; for the sake of easy installation, these cavity staking holes 23 are preferably provided on the wall surface around the microwave inlet 22.

It will be appreciated by those skilled in the art that the aforementioned specific positioning points on the cavity 21 of the microwave oven can be designed in the form of positioning holes. Specifically, a cavity positioning hole 24 corresponding to the position of the waveguide positioning hole 15 may be provided on the wall surface of the U-shaped plate 21d around the microwave inlet 22 of the microwave oven, and the cavity positioning hole 24 and the opening position of the waveguide opening positioning hole 15 should be on the same horizontal plane. Also, the number of cavity positioning holes 24 is preferably two or more from the viewpoint of precise positioning.

It should be understood that, in order to avoid the leakage of microwave or the loss of water vapor and hot air in the cavity due to the redundant openings, the number of the cavity riveting holes 23 and the waveguide riveting holes 14 should be the same, and the number of the cavity positioning holes 24 and the waveguide positioning holes 15 should be the same. The riveting method in one-to-one correspondence can ensure that the cavity 21 and the waveguide 1 are more tightly installed, the cavity 21 of the microwave oven is ensured to be a strictly sealed structure in a working state to the great extent, and water vapor and hot air in the cavity 21 cannot leak out through redundant hole positions.

The diameter of the opening of the cavity positioning hole 24 and the cavity riveting hole 23 is preferably 3.0 to 4.0mm, corresponding to the aperture of the opening in the waveguide tube installation device, and the shape and size of the two holes are set to be the same as those of the waveguide tube positioning hole 15 and the waveguide tube riveting hole 14, respectively, in actual assembly.

It will be appreciated by those skilled in the art that the tightness of the cavity 21 in the operating state can be further optimized by providing an insulating sheet 3 between the waveguide 1 and the microwave inlet 22 of the cavity 21. The shape of the insulating sheet 3 corresponds to the shapes of the microwave inlet 22 and the waveguide port 13, and is a substantially rectangular shape, and the surface thereof can cover the microwave inlet 22, the cavity riveting hole 23 and the cavity positioning hole 24 which are arranged on the cavity 21, and the waveguide port 13, the waveguide riveting hole 14 and the waveguide positioning hole 15 which are arranged on the waveguide tube body 11, thereby blocking possible gaps between the openings and better preventing water vapor and hot air in the cavity 21 from leaking out in the working process. Preferably, the insulating sheet 3 may be a mica sheet.

The person skilled in the art will also appreciate that the riveting method may be selected from, for example, pull riveting, flanging hole riveting, and the like.

Although the embodiments disclosed in the present application are described above, the descriptions are only for the convenience of understanding the present application, and are not intended to limit the present application. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure as defined by the appended claims.

Claims

1. A waveguide tube fixing and mounting device is characterized in that,

the waveguide tube (1) comprises a waveguide tube body (11) with a hollow tubular structure and a magnetron fixing support (12) fixedly connected with one end of the waveguide tube body (11), the waveguide tube (1) is installed between an outer shell and a cavity of the microwave oven in a riveting mode to the cavity of the microwave oven, and a waveguide tube riveting hole (14) used for realizing the waveguide tube fixing and installing device is correspondingly formed in the wall surface of the waveguide tube (1) close to one side of the cavity of the microwave oven; and

an upper bottom surface opening (11a) and a lower bottom surface opening (11b) are respectively formed at two ends of the waveguide tube body (11) with the hollow tubular structure, and one of the upper bottom surface opening (11a) and the lower bottom surface opening (11b) forms a waveguide port (13) on the waveguide tube body (11) for allowing microwaves to pass through and feed into a cavity of the microwave oven;

the magnetron fixing support (12) is of a sheet structure and is connected with one end of the waveguide tube body (11) in a mode of covering and fixing the magnetron fixing support on the upper bottom surface opening (11a) or the lower bottom surface opening (11 b).

2. The waveguide fixing and mounting device according to claim 1, wherein the hollow tubular structure waveguide body (11) has a truncated pyramid-like structure having a quadrangular cross section, and has upper and lower bottom surfaces and four side surfaces formed by the upper bottom surface opening (11a) and the lower bottom surface opening (11 b).

3. A waveguide tube fixing and mounting device according to claim 2, characterized in that the connecting surfaces between the side surfaces of the waveguide tube body (11) are curved surfaces with a certain radian.

4. The waveguide fixed mounting device according to claim 1, wherein the waveguide body (11) is further provided with a waveguide positioning hole (15) on a wall surface near a side of the waveguide port (13) for positioning the waveguide (1) to a specific mounting position on a cavity of a microwave oven at the time of mounting.

5. The waveguide tube fixing and mounting device as claimed in claim 1, wherein the diameter of the waveguide tube riveting hole (14) is in the range of 3.0-4.0 mm.

6. A waveguide tube mounting apparatus as claimed in any one of claims 1 to 5, wherein the riveting means comprises pull riveting or flanged hole riveting.

7. A microwave oven, characterized in that the microwave oven (2) has a waveguide fixing mounting arrangement according to any one of claims 1-6, wherein the microwave oven (2) further has an open hollow cavity (21) enclosed by a front plate (21a), a rear plate (21b), a top plate (21c) and a U-shaped plate (21d), and the U-shaped plate (21d) has a microwave inlet (22) at a location where it is connected to the waveguide fixing mounting arrangement.

8. The microwave oven according to claim 7, wherein the U-shaped plate (21d) is provided with a cavity riveting hole (23) and a cavity positioning hole (24) corresponding to the waveguide fixing and mounting device, the cavity riveting hole (23) and the cavity positioning hole (24) are both located on a wall surface around the microwave inlet (22), and the shape and size of the opening of the cavity riveting hole (23) are consistent with the shape and size of the opening of the waveguide riveting hole (14) in the waveguide fixing and mounting device.

9. The microwave oven according to claim 7, wherein the microwave inlet (22) has a shape and size corresponding to a cross-sectional shape and size of the waveguide port (13) in the waveguide fixing installation device.

10. The microwave oven according to claim 8, wherein an insulation sheet (3) covering the cavity riveting hole (23) and the cavity positioning hole (24) is further provided between the cavity (21) and the waveguide fixing and mounting device.