CN216414623U

CN216414623U - Waveguide tube for microwave oven and microwave oven

Info

Publication number: CN216414623U
Application number: CN202121966874.4U
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: 2021-08-20
Filing date: 2021-08-20
Publication date: 2022-04-29
Anticipated expiration: 2031-08-20

Abstract

The utility model relates to a waveguide tube for a microwave oven and the microwave oven. The waveguide (5) comprises a waveguide body (2) and a waveguide cover (1). The edge of the waveguide cover (1) is provided with a flanging hole (11) and a waveguide cover positioning hole (13). The flanging hole (11) is provided with a flanging which is vertical to the waveguide cover (1). The edge of the waveguide (2) is provided with a riveting hole (21) and a waveguide positioning hole (22). The position of the waveguide cover positioning hole (13) corresponds to the position of the waveguide body positioning hole (22) and is used for determining the installation position of the waveguide cover (1) relative to the waveguide body (2). The flanging of the flanging hole (11) passes through the riveting hole (21) and forms riveting connection with the waveguide body (2). The waveguide tube is riveted and connected with the riveting hole arranged on the waveguide body through the flanging hole arranged on the waveguide cover, so that the production cost of the waveguide tube is reduced, the reliability of the waveguide tube is improved, and the safety risk caused by microwave leakage of the waveguide tube is effectively avoided.

Description

Waveguide tube for microwave oven and microwave oven

Technical Field

The utility model relates to the field of kitchen appliances, in particular to a waveguide tube for a microwave oven and the microwave oven.

Background

With the development of electronic technology, more and more automatic kitchen appliances appear in the market so as to meet various requirements of people. Particularly in the field of cooking appliances, the electronic control system is integrated in the cooking appliances, so that the cooking appliances can automatically execute cooking programs, and the efficiency of cooking operation is greatly improved.

A microwave oven is a common household cooking appliance in life, and can heat, unfreeze, dry, sterilize, and the like food. In addition, the principle that a large amount of water is evaporated when the food is heated by a microwave oven can be utilized to dry or dehydrate certain foods so as to achieve the purpose of mildew prevention or long-term storage.

The microwave oven consists of power supply, magnetron, waveguide tube, control circuit, cooking cavity and other parts. In operation, the power supply provides a high voltage of about 4000 volts to the magnetron, which, under power excitation, continuously generates microwaves that are transmitted through the waveguide into the cooking chamber. Microwaves are electromagnetic waves of high frequency, which do not generate heat by themselves. The magnetron of a microwave oven is capable of generating microwaves of an oscillation frequency of about 2450 MHz. Microwaves at this frequency are able to enter the interior of the food to be heated and cause polar molecules (e.g. water, fat, protein, sugar, etc.) within the food to oscillate rapidly at a frequency of 2450MHz per second. Polar molecules in the food interact during the shaking process, and a friction-like phenomenon is generated, so that the temperature of the whole food is increased. When the microwave is used for heating food, the microwave can penetrate into the food, so that the whole food is uniformly heated, and the uniform and quick heating effect can be realized.

In a microwave oven, a waveguide serves to transmit microwaves generated by a magnetron into a cooking cavity so as to heat food in the cooking cavity. A waveguide generally comprises two parts, a waveguide body and a waveguide cover. When assembling the waveguide, it is necessary to weld the waveguide cover to the waveguide body to form the waveguide cavity. The welding between the waveguide cover and the waveguide body is generally single-spot welding or multi-spot welding. The single spot welding has low productivity, and thus adversely affects the productivity of the waveguide. The multi-spot welding, although efficient, requires high flatness of the waveguide body and the waveguide cover, thus increasing the production cost of the waveguide. In addition, the multi-spot welding has higher requirements on the uniformity of welding spots, and microwaves can be leaked if a cold joint occurs on a single welding spot, so that the use safety of the microwave oven is influenced, and the body of a user is injured.

Accordingly, it is desirable to provide a waveguide for a microwave oven that is low in cost and high in safety.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides a waveguide for a microwave oven and a microwave oven, so as to solve the above technical problems.

The utility model provides a waveguide tube for a microwave oven, which comprises a waveguide body and a waveguide cover, wherein a flanging hole and a waveguide cover positioning hole are arranged on the edge of the waveguide cover, the flanging hole is provided with a flanging perpendicular to the waveguide cover, a riveting hole and a waveguide body positioning hole are arranged on the edge of the waveguide body, the waveguide cover positioning hole corresponds to the waveguide body positioning hole in position and is used for determining the installation position of the waveguide cover relative to the waveguide body, the flanging hole corresponds to the riveting hole in position, and the flanging of the flanging hole penetrates through the riveting hole and is in riveting connection with the waveguide body.

According to a preferred embodiment of the utility model, the waveguide cover and the waveguide body are both L-shaped, the waveguide being also L-shaped.

According to a preferred embodiment of the utility model, the waveguide further comprises waveguide rivet tabs, which are riveted at the corners of the L-shaped waveguide.

According to a preferred embodiment of the utility model, the waveguide riveting tabs are symmetrically riveted on both sides of the waveguide.

According to a preferred embodiment of the present invention, the waveguide cover is provided with a first microwave output hole and a second microwave output hole for outputting microwaves into the cooking cavity.

According to a preferred embodiment of the present invention, a waveguide cover touch spot is provided on a surface of the waveguide cover facing the outside of the waveguide for welding to a cooking cavity of the microwave oven.

According to a preferred embodiment of the present invention, the waveguide body is provided with a microwave input hole for inputting the microwave generated from the magnetron.

The utility model also provides a microwave oven comprising a cooking cavity and a waveguide according to any one of the preceding claims, said waveguide being welded on an outer surface of the cooking cavity.

According to a preferred embodiment of the present invention, the microwave oven further comprises a magnetron fixing bracket welded to the waveguide.

According to a preferred embodiment of the present invention, the microwave oven further comprises a motor bracket welded to the waveguide.

According to the technical scheme, the waveguide tube for the microwave oven is in riveted connection with the riveting hole formed in the waveguide body through the flanging hole formed in the waveguide cover, so that the production cost of the waveguide tube is reduced, the reliability of the waveguide tube is improved, and the safety risk caused by microwave leakage of the waveguide tube is effectively avoided.

Furthermore, the microwave oven of the utility model inputs microwaves into the cooking cavity from different positions through the L-shaped waveguide tube, thereby improving the uniformity of food heating and improving the heating efficiency.

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 limit the subject matter.

FIG. 1 is an exploded view of a waveguide according to an embodiment of the present invention;

FIG. 2 is a perspective view of a waveguide according to an embodiment of the present invention;

fig. 3 is a partial perspective view of a microwave oven according to an embodiment of the present invention.

Description of reference numerals:

1-waveguide cover, 11-flanging hole, 12-waveguide cover touch welding point, 13-waveguide cover positioning hole, 14-first microwave output hole and 15-second microwave output hole;

2-waveguide, 21-riveting hole, 22-waveguide positioning hole, 23-microwave input hole and 24-touch welding hole;

3-magnetron fixing support;

4-waveguide rivet tab;

5-a waveguide;

6-motor support;

7-cooking chamber.

Detailed Description

Various exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the utility model, its application, or uses. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art. It should be noted that the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments are to be construed as merely illustrative, and not as limitative, unless specifically stated otherwise.

Fig. 1 is an exploded view of a waveguide for a microwave oven according to an embodiment of the present invention. Fig. 2 is a perspective view of the waveguide 5 of fig. 1 after assembly. The waveguide 5 of the present embodiment is used to be installed in a microwave oven to transmit microwaves generated from a magnetron in the microwave oven into a cooking cavity to uniformly heat food in the cooking cavity.

As shown in fig. 1 and 2, the waveguide 5 for the microwave oven of the present embodiment includes a waveguide body 2 and a waveguide cover 1. The waveguide 2 is combined with the waveguide cover 1 and forms a waveguide 5 cavity inside. The edge of the waveguide cover 1 is provided with a flanging hole 11 and a waveguide cover positioning hole 13. The burring hole 11 has a burring perpendicular to the waveguide cover 1. The burring hole 11 and the waveguide cover positioning hole 13 may be formed by a punching process. The edge of the waveguide 2 is provided with a staking hole 21 and a waveguide positioning hole 22. The staking hole 21 and the waveguide positioning hole 22 may also be formed by a press process. The position of the waveguide cover positioning hole 13 corresponds to the position of the waveguide positioning hole 22 for determining the installation position of the waveguide cover 1 with respect to the waveguide 2. During assembly of waveguide cover 1 and waveguide 2 into waveguide 5, it is only necessary to align waveguide cover positioning hole 13 with waveguide positioning hole 22 to ensure that waveguide cover 1 is mounted on waveguide 2 in the correct position. The flanging hole 11 corresponds to the riveting hole 21. When the waveguide cover positioning hole 13 is aligned with the waveguide positioning hole 22, the burring of the burring hole 11 of the waveguide cover 1 passes through the riveting hole 21 of the waveguide 2 and forms a riveting connection with the waveguide 2.

The waveguide tube 5 of the present embodiment forms a riveted connection by the flanged hole 11 formed on the edge of the waveguide cover 1 and the riveted hole 21 formed on the edge of the waveguide 2, so that the waveguide cover 1 and the waveguide 2 are tightly connected together. Compared with the welding connection mode in the prior art, the riveting connection mode adopted by the waveguide tube 5 is convenient to process, the reliable connection between the waveguide cover 1 and the waveguide body 2 can be realized at lower cost, and the risk of microwave leakage is avoided.

As shown in fig. 1 and 2, the waveguide 5 of the present embodiment has an L-shape. The waveguide cover 1 and the waveguide body 2 are also L-shaped, forming an L-shaped waveguide 5. In the present embodiment, the angle of the corner of the L-shaped waveguide 5 is 90 degrees. In other words, the waveguide 5 has two sides perpendicular to each other. The corner of the L-shaped waveguide 5 is formed by the bent waveguide cover 1 and the waveguide body 2, and its strength is low. In order to strengthen the waveguide 5 at the corners and improve the stability of the waveguide 5, the waveguide 5 may further comprise waveguide rivets 4. The waveguide rivet 4 is riveted, for example by means of a rivet, at the corner of the L-shaped waveguide 2. The riveting sheet 4 of the waveguide body can prevent microwave leakage, enhance the strength of the waveguide body 2 at the corner and avoid the bending of the assembled wave band tube 5 at the L-shaped corner. In a preferred embodiment, waveguide 5 may include a pair of waveguide rivets 4. The pair of waveguide rivet pieces 4 are symmetrically riveted to both sides of the waveguide 2, thereby improving the strength of the waveguide 5.

In this embodiment, the waveguide 2 is provided with a microwave input hole 23 for inputting the microwave generated by the magnetron. The waveguide 5 may further include a magnetron fixing bracket 3 for mounting the magnetron. The magnetron fixing bracket 3 is welded around the microwave input hole 23. The microwave generated from the magnetron installed above the microwave input hole 23 is input into the waveguide 5 through the microwave input hole 23 and transmitted into the cooking cavity of the microwave oven through the waveguide 5. The waveguide cover 1 is provided with two microwave output holes, namely a first microwave output hole 14 and a second microwave output hole 15. The first microwave output hole 14 and the second microwave output hole 15 are respectively arranged at two ends of the L-shaped waveguide cover 1 and are used for conveying microwaves into the cooking cavity from different positions of the cooking cavity 7 of the microwave oven.

In this embodiment, the waveguide 5 further comprises a motor mount 6 for mounting a motor. The motor support 6 is welded to the waveguide body 2 at a position corresponding to the second microwave output aperture 15 of the waveguide cover 1. The motor is arranged on the motor bracket 6, and the motor shaft passes through the waveguide body 2 to be connected with the antenna positioned above the second microwave output hole 15. The antenna can be rotated by the motor so that the microwave output from the second microwave output hole 15 is uniformly propagated within the cooking cavity 7 of the microwave oven, so as to improve the uniformity of heating.

Fig. 3 is a partial perspective view of the microwave oven of the present embodiment. In fig. 3, the waveguide 5 is fixed on the outer surface of the cooking cavity 7 of the microwave oven. Since the waveguide 5 of the present embodiment has an L shape (two sides of the L shape are perpendicular to each other), and the cooking cavity 7 has a rectangular parallelepiped shape, the L-shaped waveguide 5 can be closely attached to two adjacent surfaces of the cooking cavity 7. In this embodiment, the waveguide 5 may be closely attached to the bottom and side surfaces of the cooking cavity 7. The first and second microwave output holes 14 and 15 of the waveguide cover 1 of the waveguide 5 are respectively located on the side and bottom surfaces of the cooking cavity to output microwaves into the cooking cavity 7 from the side and bottom surfaces of the cooking cavity 7, thereby subjecting the food in the cooking cavity 7 to more uniform microwave radiation to improve the uniformity of heating.

In this embodiment, the waveguide 5 is welded to the cooking cavity 7 by means of butt welding. In particular, the waveguide cover 1 of the waveguide 5 is provided with a waveguide cover butt-weld 12 on the surface facing the cooking cavity 7 for welding to the cooking cavity 7 of the microwave oven by means of butt-welding. A butt-welding hole 24 is formed below the waveguide cover 1 at a position of the waveguide body 2 corresponding to the butt-welding point 12 of the waveguide cover. Shown in fig. 1 is a knock-on hole 24 located below the waveguide 2. In the operation of welding the waveguide 5 to the cooking cavity 7, the electrodes of the spot-weld may protrude into the waveguide through the spot-weld holes 24 and contact the inner surface of the waveguide cover 1 below the spot-weld 12 of the waveguide cover. The other electrode of the butt-welding machine is contacted with the position corresponding to the butt-welding point 12 of the waveguide cover in the cooking cavity, so that the waveguide tube 5 and the cooking cavity 7 are welded together in a butt-welding mode. Since the diameter of the butt-weld hole 24 is smaller than the wavelength of the microwave transmitted in the inner cavity of the waveguide, the microwave does not leak from the butt-weld hole 24.

In the use process of the microwave of the embodiment, the magnetron arranged on the magnetron fixing support 3 generates the microwave and inputs the microwave into the inner cavity of the waveguide 5 through the microwave input hole 23. During the propagation process of the waveguide 5, a part of microwaves are output from the side wall of the cooking cavity 7 to the cooking cavity 7 through the first microwave output holes 14 on the waveguide cover 1, and another part of microwaves are output from the bottom wall of the cooking cavity 7 to the cooking cavity 7 through the second microwave output holes 15, so that microwave irradiation on food in the cooking cavity 7 from different directions is realized, and the uniformity of food heating is improved.

So far, some specific embodiments of the present invention have been described in detail by way of examples, but it should be understood by those skilled in the art that the above examples are only for illustrative purposes and are not intended to limit the scope of the present invention. It will be understood by those skilled in the art that various changes may be made in the above embodiments or equivalents may be substituted for elements thereof without departing from the scope and spirit of the utility model.

Claims

1. The waveguide tube for the microwave oven is characterized in that a flanging hole (11) and a waveguide cover positioning hole (13) are formed in the edge of the waveguide cover (1), the flanging hole (11) is provided with a flanging perpendicular to the waveguide cover (1), a riveting hole (21) and a waveguide positioning hole (22) are formed in the edge of the waveguide cover (2), the waveguide cover positioning hole (13) corresponds to the waveguide positioning hole (22) in position and is used for determining the installation position of the waveguide cover (1) relative to the waveguide body (2), the flanging hole (11) corresponds to the riveting hole (21), and the flanging hole (11) penetrates through the riveting hole (21) and is in riveting connection with the waveguide body (2).

2. A waveguide according to claim 1, characterized in that the waveguide cover (1) and the waveguide (2) are both L-shaped, the waveguide (5) also being L-shaped.

3. A waveguide according to claim 2, characterized in that the waveguide (5) further comprises a waveguide rivet tab (4), the waveguide rivet tab (4) being riveted at the corner of the L-shaped waveguide (2).

4. A waveguide according to claim 3, characterized in that the waveguide rivet tab (4) is symmetrically riveted on both sides of the waveguide (2).

5. A waveguide according to claim 3, characterized in that the waveguide cover (1) is provided with a first microwave output aperture (14) and a second microwave output aperture (15) for outputting microwaves into the cooking cavity (7).

6. Waveguide tube according to claim 5, characterized in that the waveguide cover (1) is provided with waveguide cover touch spots (12) on its surface facing the outside of the waveguide tube (5) for welding to the cooking cavity (7) of a microwave oven.

7. A waveguide according to claim 1, characterized in that the waveguide (2) is provided with a microwave input aperture (23) for inputting microwaves generated by a magnetron.

8. Microwave oven, characterized in that it comprises a cooking cavity (7) and a waveguide (5) according to any of the previous claims, said waveguide (5) being welded on the outer surface of said cooking cavity (7).

9. The microwave oven according to claim 8, further comprising a magnetron fixing bracket (3), wherein the magnetron fixing bracket (3) is welded to the waveguide (2).

10. The microwave oven according to claim 8, further comprising a motor bracket (6), wherein the motor bracket (6) is welded to the waveguide body (2).