CN216414622U

CN216414622U - Microwave oven

Info

Publication number: CN216414622U
Application number: CN202122344234.6U
Authority: CN
Inventors: 张洲; 冯志德; 高艳君; 赖常云; 肖小丹
Original assignee: Zhongshan Donlim Weili Electrical Equipment Co Ltd
Current assignee: Guangdong Weili Electric Appliance Co ltd
Priority date: 2021-09-26
Filing date: 2021-09-26
Publication date: 2022-04-29
Anticipated expiration: 2031-09-26

Abstract

The utility model relates to the technical field of microwave oven circuits, in particular to a microwave oven, which comprises a microwave oven shell, a filter circuit, a delay circuit and a high-voltage transformer arranged in the microwave oven shell, wherein the filter circuit is electrically connected with the delay circuit, the delay circuit is electrically connected with the high-voltage transformer, the filter circuit and the delay circuit are respectively arranged on a filter plate and a delay plate, the delay plate and the filter plate are both arranged in the microwave oven shell, and the distance between the delay plate and the high-voltage transformer is greater than the distance between the filter plate and the high-voltage transformer. The utility model has reasonable structure and convenient wiring, separates the delay circuit from the filter circuit, shortens the length of a wire harness, reduces the maintenance cost and has strong universality and operability of the circuit.

Description

Microwave oven

Technical Field

The utility model relates to the technical field of microwave oven circuits, in particular to a microwave oven.

Background

Electrical appliances such as a household microwave oven generally need to be subjected to EMC detection, namely, equipment and a system can normally work in an electromagnetic environment and do not have the capability of electromagnetic disturbance which cannot be borne by any things in the environment, firstly, the equipment can normally work in a certain electromagnetic environment, namely the equipment has certain electromagnetic immunity (EMS); secondly, the electromagnetic disturbance generated by the equipment cannot generate excessive influence, namely electromagnetic disturbance (EMI), on other electronic products. In order to meet the international and national EMC requirements, a delay-activated circuit board is usually added during the design of the electrical appliance. The current mainstream mode is that delay circuit board and filter plate make an integrated circuit, call delay filter plate, but this kind of delay filter plate is usually installed in power cord mounting hole position, cooling fan position promptly, and this has some shortcomings:

1. the length of the wire harness from the delay filter plate to the high-voltage transformer, the timer and the like is greatly increased;

2. the time delay circuit part is very easy to damage relative to the filter plate circuit, and the maintenance cost is high;

3. the time-delay filter plate occupies a large area, is very close to the magnetron, and increases the temperature.

Therefore, the current time delay filtering plate is easy to cause safety accidents, difficult to replace after being damaged, high in cost and urgent to design a mounting structure capable of splitting a time delay circuit and a filtering circuit.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems of the prior art, the present invention is directed to a microwave oven. The utility model has reasonable structure and convenient wiring, separates the delay circuit from the filter circuit, shortens the length of a wire harness, reduces the maintenance cost and has strong universality and operability of the circuit.

The utility model relates to a microwave oven, which comprises a microwave oven shell, a filter circuit, a delay circuit and a high-voltage transformer arranged in the microwave oven shell, wherein the filter circuit is electrically connected with the delay circuit, the delay circuit is electrically connected with the high-voltage transformer, the filter circuit and the delay circuit are respectively arranged on a filter plate and a delay plate, the delay plate and the filter plate are both arranged in the microwave oven shell, and the distance between the delay plate and the high-voltage transformer is greater than the distance between the filter plate and the high-voltage transformer.

In one embodiment, a magnetron is arranged on one inner side of the microwave oven shell, and the distance between the delay plate and the magnetron is larger than the distance between the filter plate and the magnetron.

In one embodiment, a control box is further arranged on one side, away from the magnetron, of the microwave oven shell, a timer is arranged in the control box, and the delay plate is arranged on the control box.

In one embodiment, the timer is provided with a positioning boss, and the delay plate is mounted on the positioning boss through a screw.

In one embodiment, the microwave oven shell is rectangular, a movable door is arranged on the front side of the microwave oven shell, the magnetron is positioned on the right side of the microwave oven shell, and the control box is arranged on the front side of the microwave oven shell and positioned on the right side of the movable door.

In one embodiment, a lampshade is further arranged in the microwave oven shell, and the lampshade is positioned between the magnetron and the delay plate.

In one embodiment, the rear side of the microwave oven shell is also provided with a fan, the fan is arranged opposite to the control box, and the filter plate is positioned on the lateral side of the fan.

In one embodiment, the high voltage transformer and the magnetron are located on the same inside of the microwave oven housing, and the high voltage transformer is located below the magnetron.

In one embodiment, a temperature controller is electrically connected between the filter circuit and the delay circuit.

Compared with the prior art, the technical scheme of the utility model has the beneficial effects that:

the utility model has reasonable structure and convenient wiring, separates the delay circuit from the filter circuit, shortens the length of a wire harness, reduces the maintenance cost and has strong universality and operability of the circuit.

Drawings

Fig. 1 is an installation view of a microwave oven according to the present invention;

fig. 2 is a right side view of a microwave oven according to the present invention;

fig. 3 is a plan view of a microwave oven according to the present invention;

FIG. 4 is a schematic view of the installation of the timer and delay plate of the present invention;

fig. 5 is a schematic diagram of the circuit structure of the present invention.

Description of reference numerals: the method comprises the following steps of 1-a microwave oven shell, 2-a magnetron, 3-a high-voltage transformer, 4-a lamp shade, 5-a control box, 51-a timer, 52-a delay plate, 53-a positioning boss, 6-a fan, 7-a filter plate and 8-a temperature controller.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, so to speak, as communicating between the two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.

As shown in fig. 1 to 5, the microwave oven of the present invention includes a microwave oven housing 1, a filter circuit, a delay circuit and a high voltage transformer 3 disposed in the microwave oven housing 1, wherein the filter circuit is electrically connected to the delay circuit, the delay circuit is electrically connected to the high voltage transformer 3, the filter circuit and the delay circuit are respectively mounted on a filter plate 7 and a delay plate 52, the delay plate 52 and the filter plate 7 are both disposed in the microwave oven housing 1, and a distance between the delay plate 52 and the high voltage transformer 3 is greater than a distance between the filter plate 7 and the high voltage transformer 3. The utility model has reasonable structure and convenient wiring, the time delay plate 52 and the filter plate 7 are separately installed on the structure, the length of a wire harness is shortened, the maintenance cost is reduced, and the universality and the operability of the circuit are strong.

Further, a magnetron 2 is provided on one of the inner sides of the microwave oven case 1, and the distance between the delay plate 52 and the magnetron 2 is larger than the distance between the filter plate 7 and the magnetron 2. The magnetron 2, as an electric vacuum device for generating microwave energy, is essentially a diode placed in a constant magnetic field, and electrons in the tube interact with a high-frequency electromagnetic field under the control of the constant magnetic field and the constant electric field which are perpendicular to each other, so as to convert energy obtained from the constant electric field into microwave energy, thereby achieving the purpose of generating microwave energy. Therefore, the magnetron 2 is a source of heat generated from the microwave oven, the delay plate 52 is located as far away from the magnetron 2 as possible, and further the lamp housing 4 is provided in the microwave oven case 1 such that the lamp housing 4 is located between the magnetron 2 and the delay plate 52, for example, at a corner. The lampshade 4 can shield the high-temperature radiation generated by the anode of the magnetron 2, and the temperature rise of the delay plate 52 is not higher when the microwave oven stops working.

In one embodiment, the side of the microwave oven case 1 away from the magnetron 2 is further provided with a control box 5, a timer 51 is arranged in the control box 5, and a delay plate 52 is arranged on the control box 5. The control box 5 integrates control elements such as temperature, time knobs, etc. for external control, and thus the timer 51 and the delay plate 52 are provided inside for wiring and reducing wiring harness. In addition, as shown in fig. 4, in order to facilitate the installation and removal of the delay plate 52, a positioning boss 53 is provided on the timer 51, and the delay plate 52 is installed on the positioning boss 53 by a screw. A positioning boss 53 is added on the timer 51, and the delay plate 52 is fixed with the timer 51 through a screw, so that the delay plate can be taken as an assembly together with the control box 5 and then installed on a microwave oven product, and the microwave oven is convenient to disassemble and maintain independently. The delay plate 52 can be modularly replaced if it fails; the delay plate 52 can be provided with a plug port, and the filter plate 7, the high-voltage transformer 3 or other components are connected by using the plug port, so that the quick replacement function is realized; meanwhile, the wiring harness for connecting the delay plate 52 can be changed into a structure without the delay plate 52 only by removing two wiring harnesses, the universality is very strong, and a more convenient design idea is provided for production, manufacturing and after-sale maintenance. In addition, in the production and manufacturing links, once the order material error occurs, the method can be used for quick adjustment, and the fault tolerance rate is high.

In one embodiment, the microwave oven case 1 is rectangular, a movable door is provided on the front side of the microwave oven case 1, the magnetron 2 is located on the right side of the microwave oven case 1, and the control box 5 is provided on the front side of the microwave oven case 1 and on the right side of the movable door. As shown in fig. 1 to 3, the magnetron 2 is arranged at one inner side, the control box 5 is arranged at the front surface at the same side with the movable door and is close to the magnetron 2, so that the wiring harness of the timer 51 and the delay plate 52 on the control box and the magnetron 2 is shortened, and the maintenance cost is reduced. Further, a fan 6 is provided at the rear side of the microwave oven case 1, and the fan 6 is disposed opposite to the control box 5, and the filter plate 7 is located at the side of the fan 6, for example, both are disposed up and down, respectively. The delay plate 52 is located on the wind flow path of the fan 6, and in the operating state of the microwave oven, the rear fan 6 blows, which will take away the heat generated by the delay plate 52 itself, further dissipate the heat and prolong the service life of the delay plate 52. The high voltage transformer 3 and the magnetron 2 are located on the same inner side of the microwave oven housing 1, and the high voltage transformer 3 is located below the magnetron 2. The installation and the position arrangement are more reasonable, and the connected wire harnesses are concentrated and are convenient to hide. And a temperature controller 8 is electrically connected between the filtering plate 7 and the timer 51 and used for preventing safety accidents such as circuit heating and the like, and meanwhile, a two-stage switch is arranged and respectively positioned on the live wire and the zero line to synchronously realize on-off, so that the whole circuit can be completely powered off after the switch is disconnected.

Compared with the prior art, the filter circuit and the delay circuit are respectively arranged on different circuit boards, the two circuit boards are separated in the inner space of the microwave oven, the installation position of the delay board 52 is changed, the delay board 52 is far away from the magnetron 2 and is close to the high-voltage transformer 3 and the timer 51, and the delay board 52 and the timer 51 are assembled together, so that the length of a wiring harness between the delay circuit and the high-voltage transformer 3 is shortened, and the cost is reduced. When the microwave oven stops working, the high temperature generated by the magnetron 2 can radiate, and the lampshade 4 is arranged close to the front plate to shield the temperature return of the magnetron 2, so that the problem of temperature rise is solved. As shown in the circuit of FIG. 5, the present invention can also achieve the generalization of the internal connection wiring harness of the microwave oven with the delay plate and the internal connection wiring harness of the microwave oven without the delay plate, if the delay function is not needed, the delay plate 52 can be removed, the two connection wires can be removed, and the universality is strong. The structure is suitable for common single microwave functional products, microwave ovens with other functions such as barbecue and the like, and can also be used on household appliances such as ovens and the like which use the timer 51 as a control mode. The timer 51 may be a dual-axis timer or a single-axis timer, may control only time, or may be a functional timer. In addition, this mounting orientation can also be used on switches that are of the type that are individual components.

In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse explanation, these directional terms do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present application.

In the drawings, the positional relationship is described for illustrative purposes only and is not to be construed as limiting the present patent; it should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A microwave oven is characterized by comprising a microwave oven shell (1), a filter circuit, a delay circuit and a high-voltage transformer (3) arranged in the microwave oven shell (1), wherein the filter circuit is electrically connected with the delay circuit, the delay circuit is electrically connected with the high-voltage transformer (3), the filter circuit and the delay circuit are respectively arranged on a filter plate (7) and a delay plate (52), the delay plate (52) and the filter plate (7) are both arranged in the microwave oven shell (1), and the distance between the delay plate (52) and the high-voltage transformer (3) is larger than the distance between the filter plate (7) and the high-voltage transformer (3).

2. A microwave oven as claimed in claim 1, characterized in that a magnetron (2) is provided on one of the inner sides of the oven housing (1), the distance between the delay plate (52) and the magnetron (2) being greater than the distance between the filter plate (7) and the magnetron (2).

3. The microwave oven according to claim 2, characterized in that a control box (5) is further provided on a side of the oven housing (1) away from the magnetron (2), a timer (51) is provided in the control box (5) and the delay plate (52) is provided on the control box (5).

4. The microwave oven as claimed in claim 3, wherein said timer (51) is provided with a positioning boss (53), and said delay plate (52) is mounted on said positioning boss (53) by means of a screw.

5. The microwave oven according to claim 4, wherein said microwave oven housing (1) is rectangular parallelepiped, a movable door is provided at a front side of said microwave oven housing (1), said magnetron (2) is located at a right side of said microwave oven housing (1), and said control box (5) is provided at the front side of said microwave oven housing (1) and at a right side of said movable door.

6. A microwave oven according to claim 2 or 3 or 4 or 5, characterized in that a lampshade (4) is further arranged in said microwave oven housing (1), and said lampshade (4) is located between said magnetron (2) and said delay plate (52).

7. A microwave oven as claimed in claim 3, 4 or 5, characterized in that a fan (6) is provided on the rear side of the oven housing (1), and that said fan (6) is arranged opposite to said control box (5), said filter plate (7) being located laterally of said fan (6).

8. Microwave oven according to claim 7, characterized in that the high voltage transformer (3) and the magnetron (2) are located on the same inner side of the microwave oven housing (1) and that the high voltage transformer (3) is located below the magnetron (2).

9. The microwave oven according to any of the claims 1-5, characterized in that a temperature controller (8) is electrically connected between the filter circuit and the delay circuit.