Microwave oven and heat dissipation structure thereof

Abstract

The utility model relates to the technical field of microwave ovens, in particular to a microwave oven and a heat dissipation structure thereof, which comprises a shell, a fan assembly, a magnetron and a transformer, two opposite side walls of the shell are a first side wall and a second side wall respectively, and heat dissipation holes are formed in the first side wall and the second side wall; the fan assembly is arranged on the side, close to the first side wall, of the shell, the fan assembly comprises a mounting frame, a first fan and a second fan, the mounting frame is fixedly connected with the shell, and the first fan and the second fan are mounted on the mounting frame; the air draft end of the first fan and the air draft end of the second fan are communicated with the outside through heat dissipation holes in the first side wall, the magnetron is located on the air outlet path of the first fan, and the transformer is located on the air outlet path of the second fan. According to the microwave oven, the heat dissipation efficiency of the microwave oven can be effectively improved, and noise during heat dissipation is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of microwave ovens, in particular to a microwave oven and a heat dissipation structure thereof. Background Art

[0002] Microwaves are a type of electromagnetic wave. A microwave oven consists of a power supply, a magnetron, a control circuit, and a cooking chamber. The power supply provides a high voltage of about 4,000 volts to the magnetron. Under the excitation of the power supply, the magnetron continuously generates microwaves, which are then coupled into the cooking chamber through a waveguide system. Inside a microwave oven, the magnetron used to generate microwaves for heating and the transformer that provides high voltage to the magnetron are the two largest heating elements. The large amount of heat generated continuously will cause the temperature of these components to rise sharply, affecting the normal operation of the machine. Therefore, in order to ensure the normal operation of each component and reduce the impact of high temperature on the service life, the heat inside the microwave oven needs to be discharged in a timely manner.

[0003] Existing products mainly use an AC fan with a larger diameter. The fan is fixed on the back panel of the electric control room. In front of the fan outlet, the upper half is the magnetron and the lower half is the transformer. A fan is used to blow directly to the magnetron and the transformer to dissipate heat. Most of the airflow in the upper half passes through the magnetron to take away the heat, and a small part of the airflow flows upward to cool the filter board and power cord bifurcation above the fan. The airflow in the lower half is mainly used to cool the transformer, while the capacitor under the fan and the components on the remote electronic panel are also cooled.

[0004] The above heat dissipation method has the following problems: (1) The air flow rate driven by a single fan is small, resulting in low heat dissipation efficiency; (2) In order to ensure that the internal components of the microwave oven can work normally, the speed of the heat dissipation fan needs to be increased, which will cause loud noise during operation. Utility Model Content

[0005] The utility model aims to overcome the deficiencies of the prior art. The utility model provides a microwave oven and a heat dissipation structure thereof, which have high heat dissipation efficiency and low noise.

[0006] In order to solve the above problems, the utility model proposes a heat dissipation structure of a microwave oven, comprising a shell, a fan assembly, a magnetron and a transformer;

[0007] The two opposite side walls of the shell are respectively the first side wall and the second side wall, and the first side wall and the second side wall are both provided with heat dissipation holes; the fan assembly is provided on the side close to the first side wall, and the fan assembly includes a mounting frame, a first fan and a second fan, the mounting frame is fixedly connected to the shell, and the first fan and the second fan are installed on the mounting frame; the exhaust ends of the first fan and the second fan are connected to the outside through the heat dissipation holes of the first side wall, the magnetron is located on the air outlet path of the first fan, and the transformer is located on the air outlet path of the second fan.

[0008] As an improvement of the above technical solution, the mounting frame includes a first mounting area and a second mounting area;

[0009] The distance between the first installation area and the first side wall is smaller than the distance between the second installation area and the first side wall. The first fan is installed on the first installation area, and the second fan is installed on the second installation area.

[0010] As an improvement of the above technical solution, the distance from the first installation area to the first side wall is D1, the distance from the second installation area to the first side wall is D2, and D1 is 1 / 3-3 / 4 of D2.

[0011] As an improvement of the above technical solution, both sides of the first installation area and the second installation area are provided with installation walls, and the installation walls are respectively fixedly connected to the inner wall of the shell and the furnace cavity in the shell.

[0012] As an improvement of the above technical solution, it also includes a first heat dissipation channel and a second heat dissipation channel;

[0013] One end of the first heat dissipation channel is connected to the blowing end of the first fan, and the other end is connected to the heat dissipation hole of the second side wall, and the magnetron is arranged in the first heat dissipation channel;

[0014] One end of the second heat dissipation channel is connected to the blowing end of the second fan, and the other end is connected to the heat dissipation hole of the second side wall. The transformer is arranged in the second heat dissipation channel.

[0015] As an improvement of the above technical solution, the fans of the first fan and the second fan, in the direction of air outlet, the leading edge of the blades of each fan extends outward from the hub of the fan in a counterclockwise rotation direction, the trailing edge of the blade extends outward from the hub in a counterclockwise rotation direction, and the blades of the fan rotate in a counterclockwise direction.

[0016] As an improvement of the above technical solution, the motor of the fan is a shaded-pole asynchronous motor with a stator mounted reversely relative to a rotor.

[0017] The utility model also provides a microwave oven, comprising the above-mentioned heat dissipation structure.

[0018] The implementation of this utility model has the following beneficial effects:

[0019] The utility model sets a fan assembly at the first side wall of the shell, and the fan assembly includes a first fan and a second fan. The air exhaust ends of the first fan and the second fan are connected to the outside through the heat dissipation holes of the first side wall. The magnetron is located on the air outlet path of the first fan, and the transformer is located on the air outlet path of the second fan. Compared with the prior art, the utility model adds a heat dissipation air duct, so that the magnetron and the transformer can be separately and independently cooled, which improves the heat dissipation efficiency and reduces the speed of the fan, effectively reducing noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a view of the internal structure of a microwave oven according to an embodiment of the utility model;

[0021] Figure 2 This is a view of the internal structure of a microwave oven according to another embodiment of the present utility model;

[0022] Figure 3 It is a three-dimensional view of a fan according to another embodiment of the utility model. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.

[0024] See also Figure 1 As shown, an embodiment of the utility model provides a heat dissipation structure of a microwave oven, including a housing 1, a fan assembly 4, a magnetron 2 and a transformer 3.

[0025] The embodiment of the utility model improves the heat dissipation structure of the microwave oven, thereby improving the heat dissipation efficiency and reducing the noise during heat dissipation.

[0026] Specifically, the two opposite side walls of the shell 1 are respectively a first side wall 11 and a second side wall 12, and the first side wall 11 and the second side wall 12 are both provided with heat dissipation holes 13; the fan assembly 4 is provided on the side close to the first side wall 11, and the fan assembly 4 includes a mounting frame, a first fan 41 and a second fan 42, and the mounting frame is fixedly connected to the shell 1, and the first fan 41 and the second fan 42 are installed on the mounting frame; the exhaust ends of the first fan 41 and the second fan 42 are connected to the outside through the heat dissipation holes 13 of the first side wall 11, the magnetron 2 is located on the air outlet path of the first fan 41, and the transformer 3 is located on the air outlet path of the second fan 42.

[0027] The utility model is provided with a fan assembly 4 at the first side wall of the housing, and the fan assembly 4 includes a first fan 41 and a second fan 42, the air exhaust ends of the first fan 41 and the second fan 42 are connected to the outside through the heat dissipation holes 13 of the first side wall 11, the magnetron 2 is located on the air outlet path of the first fan 41, and the transformer 3 is located on the air outlet path of the second fan 42. Compared with the prior art, the utility model adds a heat dissipation air duct, so that the magnetron 2 and the transformer 3 can be separately and independently cooled, which improves the heat dissipation efficiency and reduces the speed of the fan, effectively reducing the noise.

[0028] Preferably, the mounting frame includes a first mounting area 43 and a second mounting area 44;

[0029] The distance between the first installation area 43 and the first side wall 11 is smaller than the distance between the second installation area 44 and the first side wall 11. The first fan 41 is installed on the first installation area 43, and the second fan 42 is installed on the second installation area 44. There is a distance difference between the first installation area 43 and the second installation area 44, so that the first fan 41 and the second fan 42 will not affect the heat dissipation efficiency in turn when they are working.

[0030] More preferably, the distance between the first installation area 43 and the first side wall 11 is D1, the distance between the second installation area 44 and the first side wall 11 is D2, and D1 is 1 / 3-3 / 4 of D2, so that the position distance difference between the first fan 41 and the second fan 42 is at a reasonable level, reducing the turbulence generated during operation.

[0031] More preferably, both sides of the first installation area 43 and the second installation area 44 are provided with installation walls 45 , and the installation walls 45 are fixedly connected to the inner wall of the shell 1 and the furnace cavity in the shell 1 respectively.

[0032] Preferably, see Figure 2 , in another embodiment, further comprising a first heat dissipation channel 14 and a second heat dissipation channel 15;

[0033] One end of the first heat dissipation channel 14 is connected to the blowing end of the first fan 41, and the other end is connected to the heat dissipation hole 13 of the second side wall 12. The magnetron 2 is arranged in the first heat dissipation channel 14;

[0034] One end of the second heat dissipation channel 15 is connected to the blowing end of the second fan 42 , and the other end is connected to the heat dissipation hole 13 of the second side wall 12 . The transformer 3 is disposed in the second heat dissipation channel 15 .

[0035] The arrangement of the first heat dissipation channel 14 and the second heat dissipation channel 15 makes the airflow generated by the first fan 41 and the second fan 42 more concentrated, which solves the problem of gas turbulence easily generated when the two fans are working, and reduces the heat dissipated from the magnetron 2 and the transformer 3 into the housing 1.

[0036] Preferably, see Figure 3 The first fan 41 and the second fan 42 have a leading edge of a blade 45 of each fan extending outward from the hub of the fan in a counterclockwise direction in the direction of air outlet, and a trailing edge of the blade 45 extending outward from the hub in a counterclockwise direction, and the blades 45 of the fan rotate in a counterclockwise direction. Compared with clockwise rotation, counterclockwise rotation has a smoother airflow, which can increase the air volume and reduce noise, and at the same time improve the heat dissipation performance of the microwave oven, thereby extending the service life of the microwave oven.

[0037] Preferably, the motor of the fan is a shaded-pole asynchronous motor with the stator mounted reversely relative to the rotor.

[0038] Correspondingly, the utility model also provides a microwave oven, characterized by comprising the heat dissipation structure described above.

[0039] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the protection scope of the present invention.

Claims

1. A heat dissipation structure of a microwave oven, characterized in that: Includes housing, fan assembly, magnetron and transformer; The two opposite side walls of the shell are respectively the first side wall and the second side wall, and the first side wall and the second side wall are both provided with heat dissipation holes; the fan assembly is provided on the side close to the first side wall, and the fan assembly includes a mounting frame, a first fan and a second fan, the mounting frame is fixedly connected to the shell, and the first fan and the second fan are installed on the mounting frame; the exhaust ends of the first fan and the second fan are connected to the outside through the heat dissipation holes of the first side wall, the magnetron is located on the air outlet path of the first fan, and the transformer is located on the air outlet path of the second fan.

2. The heat dissipation structure according to claim 1, characterized in that: The mounting frame includes a first mounting area and a second mounting area; The distance between the first installation area and the first side wall is smaller than the distance between the second installation area and the first side wall. The first fan is installed on the first installation area, and the second fan is installed on the second installation area.

3. The heat dissipation structure according to claim 2, characterized in that: The distance between the first installation area and the first side wall is D1, the distance between the second installation area and the first side wall is D2, and D1 is 1 / 3-3 / 4 of D2.

4. The heat dissipation structure according to claim 2, characterized in that: Both sides of the first installation area and the second installation area are provided with installation walls, and the installation walls are respectively fixedly connected to the inner wall of the shell and the furnace cavity in the shell.

5. The heat dissipation structure according to claim 1, characterized in that: Also includes a first heat dissipation channel and a second heat dissipation channel; One end of the first heat dissipation channel is connected to the blowing end of the first fan, and the other end is connected to the heat dissipation hole of the second side wall, and the magnetron is arranged in the first heat dissipation channel; One end of the second heat dissipation channel is connected to the blowing end of the second fan, and the other end is connected to the heat dissipation hole of the second side wall. The transformer is arranged in the second heat dissipation channel.

6. The heat dissipation structure according to claim 1, characterized in that: The fans of the first fan and the second fan have a leading edge of a blade of each fan extending outward from the hub of the fan in a counterclockwise direction in the direction facing the air outlet, a trailing edge of the blade extending outward from the hub in a counterclockwise direction, and the blades of the fan rotate in a counterclockwise direction.

7. The heat dissipation structure according to claim 6, characterized in that: The motor of the fan is a shaded-pole asynchronous motor with a stator mounted reversely relative to a rotor.

8. A microwave oven, characterized in that: It comprises the heat dissipation structure as described in any one of claims 1 to 7.

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