CN115989956A - Heat dissipation air duct system of microwave oven and microwave oven - Google Patents

Abstract

The invention discloses a radiating air duct system of a microwave oven and the microwave oven, wherein the microwave oven comprises a main radiating air duct and a microwave radiating air duct; the heat dissipation air duct system comprises a shell; an inner shell, wherein the outer shell is matched with the inner shell to define at least one accommodating cavity; the microwave radiating air duct is arranged in the accommodating cavity and matched with the inner wall of the accommodating cavity to form the microwave radiating air duct; the air shell structure comprises a first shell, wherein a first air channel is formed in the first shell or matched with the inner wall of the accommodating cavity; the second shell is arranged at the downstream of the first shell along the direction of cooling air flow, and a second air channel is formed in the second shell or matched with the inner wall of the accommodating cavity; the first air duct is communicated with the second air duct. According to the radiating air duct system, when part of electronic components arranged in the radiating air duct are required to be disassembled, only the shell of the corresponding area is required to be disassembled, the integral disassembly of the air shell structure is not required, the disassembly process is simplified, and the disassembly efficiency is improved.

Description

Heat dissipation air duct system of microwave oven and microwave oven

Technical Field

The invention belongs to the field of household appliances, and particularly relates to a radiating air duct system of a microwave oven and the microwave oven.

Background

The implementation of the microwave oven requires adding a microwave system on the oven, and compared with other systems, the electronic elements in the microwave system are heating electronic elements, and the temperature limiting value is strictly required. Therefore, the cooling air duct needs to be designed to ensure that the temperature value of the microwave electronic component is lower than a limit value and reduce the influence of the heating electronic component on other electronic components.

In the existing embedded oven products with microwave functions, the heat dissipation of a microwave system mainly comprises two modes, namely a single-air-duct heat dissipation scheme and a double-air-duct heat dissipation scheme. The single air duct heat dissipation scheme is as follows: the main cooling fan simultaneously dissipates heat for the oven electronic component and the microwave system, and the scheme has higher performance requirements on the main cooling fan and unsatisfactory heat dissipation effect; the double air duct scheme is as follows: the air duct is divided into the main cooling air duct and the microwave system cooling air duct through the plastic air duct, and the scheme has better sealing performance, but the plastic air duct is of an integrated structure, can only be integrally removed when the plastic air duct needs to be removed, and in addition, the plastic air duct has no space for installing a high-voltage starting capacitor and is only suitable for a variable-frequency microwave system which only needs to be provided with an inverter, so that the cooling requirement of the microwave system which needs to be provided with a transformer and a high-voltage capacitor cannot be met.

The Chinese patent with the application number of CN201720196731.7 discloses a heat dissipation air duct structure which is arranged in equipment and used for dissipating heat of a part to be dissipated in the equipment, and comprises a first cover body and a second cover body, wherein in an assembled state, the first cover body and the second cover body are combined together and used for limiting a main heat dissipation air duct, the main heat dissipation air duct is provided with an air inlet and an air outlet, and the position between the air inlet and the air outlet is used for arranging the part to be dissipated; the length of the second cover body is larger than that of the first cover body.

The radiating air duct structure in the scheme is in an upper-lower two-section type, and even if only local electronic components in the air duct are required to be maintained, the cover body on the whole upper part is required to be removed, so that the radiating air duct structure is inconvenient to install and detach.

The present invention has been made in view of the above technical drawbacks.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a radiating air duct system of a microwave oven, which is convenient to disassemble and assemble.

In order to solve the technical problems, the invention adopts the basic conception of the technical scheme that:

the heat dissipation air duct system of the microwave oven comprises a main heat dissipation air duct for dissipating heat of an electronic element of the oven and a microwave heat dissipation air duct for dissipating heat of the electronic element of the microwave oven;

the heat dissipation air duct system comprises a heat dissipation air duct system,

a housing;

an inner shell arranged inside the outer shell, wherein the outer shell is matched with the inner shell to define at least one accommodating cavity;

the microwave radiating air duct is arranged in the accommodating cavity and matched with the inner wall of the accommodating cavity to form the microwave radiating air duct;

the wind-housing structure comprises a wind-housing structure,

a first air duct through which cooling air flows is formed in the first shell, or the first air duct is formed by matching with the inner wall of the accommodating cavity;

the second shell is arranged at the downstream of the first shell along the direction of cooling airflow, and the second air channel is formed inside the second shell or is matched with the inner wall of the accommodating cavity to form the second air channel;

the first air duct is communicated with the second air duct.

Through adopting above-mentioned scheme, when needs carry out the dismouting to the partial electronic component that sets up in the heat dissipation wind channel, only need demolish the casing in corresponding region, need not to demolish the fan housing structure is whole, has simplified the dismouting process, has improved dismouting efficiency.

Further, the top of the first shell is provided with an opening, and at least the first opening is matched with the top wall of the shell to form a first air channel through which cooling air flows;

the second shell is provided with a top wall, and the top wall is matched with the inner shell to form the second air duct;

preferably, the first housing and the second housing are connected to form the heat dissipation air duct.

Through adopting above-mentioned scheme, when needing to maintain or change the electronic component that sets up in first wind channel, only need demolish the shell roof and can correspond and expose electronic component, not only be convenient for the dismouting between first casing and the shell, the dismouting of the electronic component of being convenient for again.

Further, the first shell is of a plate-shaped structure, the upper end and the lower end of the first shell are respectively connected with the outer top wall of the inner shell and the inner top wall of the outer shell, and the first shell is matched with the inner shell and the outer shell to form the first air duct;

preferably, a side of the first housing facing the second housing is connected to a side wall of the second housing.

Through adopting above-mentioned scheme, not only simplified the structure of first casing, simplified the connected mode of first casing and second casing and inner shell again, practiced thrift the material, reduction in production cost.

Further, the electronic component mounting device also comprises a mounting part which is arranged on the top wall and/or the side wall of the air shell structure and is used for mounting the electronic component;

the mounting portion may comprise a plurality of mounting portions,

the limiting unit is arranged on the top wall and/or the side wall of the air shell structure, and is matched with the air shell structure to form an installation area for limiting the electronic element;

and the connecting unit is arranged on the top wall and/or the side wall of the air shell structure and is used for being connected with the electronic component to fixedly install the electronic component in the installation area of the air shell structure.

Through adopting above-mentioned scheme, can install relevant electronic component on the roof and/or the lateral wall of fan housing structure through the installation department, prevent that some electronic component that wait to dispel the heat can't with the relevant structure direct contact on the microwave oven, be inconvenient for setting.

Further, the mounting portion is provided on the second housing;

preferably, the mounting portion is provided on a top wall of the second housing;

further preferably, the mounting portion is provided outside the second housing top wall.

Further, the top wall of the second shell is provided with a downward bending section, the limiting unit is arranged on the outer side of the downward bending section, and the limiting unit is matched with the downward bending section to form the installation area.

By adopting the scheme, the electronic element can be arranged on the top wall of the second shell, and the distance between the electronic element and the rear wall of the air shell structure is far, so that the electronic element arranged on the installation part can be prevented from contacting with the outer top wall of the inner shell of the microwave oven; in addition, the structure and the forming mode of the installation area are simpler, and the installation is convenient.

Further, the method also comprises the steps of,

the air inlet is arranged at one side of the air shell structure, provided with the first shell;

the air outlet is arranged on one side of the air shell structure, provided with the second shell;

the mounting part is arranged at one end of the second shell, which is provided with an air outlet;

preferably, the first shell is at least matched with the shell to form the air inlet.

Further, the second housing includes,

the first section is configured as a shell section of the second shell, which is close to the first shell, and the corresponding air channel part is configured as a first channel;

the second section is configured as a casing section of the second casing far away from the first casing, is provided with the mounting part, and the corresponding air duct part is configured as a second channel.

Through adopting above-mentioned scheme, the two segmentation structures of second casing can be different electronic component heat dissipation respectively, improve radiating efficiency.

Further, the microwave electronic component comprises a magnetron, and is arranged in the first channel and used for radiating heat of the magnetron;

the mounting part is used for mounting high-voltage capacitors, and the second channel is used for radiating the high-voltage capacitors.

By adopting the scheme, the air duct can only radiate heat of the microwave electronic element of the microwave oven, so that the radiating efficiency is improved, and the oven electronic element and the microwave electronic element can be prevented from generating different heat and interfering with each other after heating.

Another object of the present invention is to provide a microwave oven with the above-mentioned heat dissipation air duct system, wherein the microwave oven is a fixed frequency microwave oven, comprising,

the transformer is arranged in the first air duct;

the high-voltage capacitor is arranged on the air shell structure;

or the microwave oven is a variable-frequency microwave oven, and comprises an inverter arranged at the position of the transformer in the cavity of the air shell structure.

By adopting the scheme, the radiating fan shell structure is provided with the installation part for installing the high-voltage capacitor, so that the same radiating fan shell structure can be used in the microwave mode of fixed-frequency microwaves or variable-frequency microwaves, the corresponding radiating fan shell structure is not required to be arranged independently, and the integral structure of the microwave oven is simplified.

By adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects.

1. The fan shell structure is divided into a front section structure and a rear section structure, when part of electronic components arranged in the heat dissipation air duct are required to be disassembled, only the shell in the corresponding area is required to be disassembled, the fan shell structure is not required to be integrally disassembled, the disassembly and assembly process is simplified, and the disassembly and assembly efficiency is improved.

2. When the electronic component arranged in the first air duct needs to be maintained or replaced, the electronic component can be correspondingly exposed only by removing the top wall of the shell, so that the disassembly and assembly between the first shell and the shell are convenient, and the disassembly and assembly of the electronic component are convenient.

3. The first shell is simple in structure, and the connecting mode of the first shell, the second shell and the inner shell is adopted, so that materials are saved, and production cost is reduced.

4. The installation part which can be used for installing the high-voltage capacitor is arranged on the wind shell structure, the installation part is positioned at the outer side of the top wall of the second shell, and the high-voltage capacitor installed outside the wind shell structure is radiated through the shell wall of the second shell, so that the influence of heat generated by a heating pipe on the microwave oven on the high-voltage capacitor is greatly prevented after the wind shell structure is installed on the microwave oven; in practical application, if the microwave oven adopts a fixed-frequency microwave system, a high-voltage capacitor can be correspondingly arranged on the mounting part, and if the microwave oven adopts a variable-frequency microwave system, the mounting part can be empty without high-voltage capacitor, namely the wind shell structure is suitable for the variable-frequency microwave system and the fixed-frequency microwave system, and the universality of the wind shell structure is improved.

5. The heat dissipation air duct is used for dissipating heat of the microwave electronic components, not only can the heat dissipation air duct dissipate heat of the microwave electronic components of the microwave oven, and improves heat dissipation efficiency, but also prevents the oven electronic components and the microwave electronic components from generating heat differently and interfering with each other after heating.

The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. It is evident that the drawings in the following description are only examples, from which other drawings can be obtained by a person skilled in the art without the inventive effort. In the drawings:

FIG. 1 is a schematic diagram of a fixed frequency microwave oven of the present invention;

FIG. 2 is a schematic diagram of the structure of the variable frequency microwave oven of the present invention;

FIG. 3 is a schematic view of the structure of the first housing of the present invention;

fig. 4 is a schematic structural view of the second housing of the present invention.

In the figure: 1. a wind shell structure; 11. a first housing; 111. a first flanging; 112. a second flanging; 113. a connection hole; 12. a second housing; 1201. a first section; 12011. an opening; 1202. a second section; 120. a mounting part; 121. a connection unit; 122. a limit unit; 14. an air outlet; 15. wiring grooves; 17. a wire guide; 171. a pore structure; 2. a microwave oven; 21. a high voltage capacitor; 22. a transformer; 23. a magnetron; 24. a blower; 26. an air supply port; 29. an inverter; 201. a housing; 202. an inner case; 203. a control panel; 204. a door body; 205. a front plate.

It should be noted that these drawings and the written description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept to those skilled in the art by referring to the specific embodiments.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention, and the following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that the positional or positional relationship indicated by the terms such as "upper", "inner", "outer", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1 to 4, the heat dissipation air duct system of the microwave oven according to the present invention includes a main heat dissipation air duct for dissipating heat from an electronic component of the oven and a microwave heat dissipation air duct for dissipating heat from the electronic component of the microwave oven; the heat dissipation air duct system comprises a shell 201; an inner case 202 disposed inside the outer case 201, the outer case 201 cooperating with the inner case 202 to define at least one accommodation chamber; the microwave heat dissipation device also comprises a fan shell structure 1 which is arranged in the accommodating cavity and is matched with part of the inner wall of the accommodating cavity to form the microwave heat dissipation air duct; the air shell structure 1 comprises a first shell 11, wherein a first air channel through which cooling air flows is formed in the first shell 11, or the first shell 11 is matched with the inner wall of a containing cavity to form the first air channel; a second housing 12 disposed downstream of the first housing 11 in the direction of the cooling air flow, in which a second air duct through which the cooling air flow can pass is formed, or the second housing 12 and the inner wall of the accommodating chamber cooperate to form the second air duct; the first air duct is communicated with the second air duct.

The fan case structure 1 is of a front-rear sectional structure, when part of electronic components arranged in the microwave radiating air duct are required to be disassembled, only the first shell 11 or the second shell 12 in the corresponding area is required to be disassembled, the fan case structure 1 is not required to be disassembled integrally, the disassembly and assembly process is simplified, and the disassembly and assembly efficiency is improved.

The top of the first shell 11 is provided with an opening, and at least a first air channel through which cooling air flows can be formed by matching with the top wall of the shell 201; the second housing 12 has a top wall, and a second air duct through which cooling air flows is formed inside, or the second housing 12 is in a shape of a housing, and has an opening on a side facing the inner housing 202, and the second air duct can be formed in cooperation with the inner housing 202.

When the electronic components arranged in the first air duct are required to be maintained or replaced, the electronic components can be correspondingly exposed only by removing the top wall of the shell 201, so that the first shell 11 and the shell 201 are convenient to disassemble and assemble, and the electronic components are convenient to disassemble and assemble.

As shown in fig. 2, the first housing 11 and the second housing 12 are connected to form the microwave radiating air duct. The microwave radiating air duct formed by the cooperation of the first air duct and the second air duct is of an integrated structure, so that the integration of the microwave radiating air duct can be realized, the tightness of the microwave radiating air duct is further ensured, and the radiating effect is improved. The first shell 11 and the second shell 12 are in an integral structure, or the first shell 11 and the second shell 12 are spliced to form the wind shell structure 1.

As shown in fig. 2 and 3, the first housing 11 has a plate-like structure, and upper and lower ends thereof are respectively connected with an outer top wall of the inner housing 202 and an inner top wall of the outer housing 201, and cooperate with the inner housing 202 and the outer housing 201 to form the first air duct; preferably, a side of the first housing 11 facing the second housing 12 is connected to a side wall of the second housing 12.

As an embodiment, the first housing 11 is made of metal, so as to reduce the material cost.

As an embodiment, the air shell structure 1 is disposed at the left side of the accommodating cavity, the first housing 11 is connected with the right side wall of the second housing 12, and the first housing 11 cooperates with the left side wall of the outer housing 201, the top wall and the outer top wall of the inner housing 202 to form the first air duct.

The plate-shaped structure of the first shell 11 simplifies the structure of the first shell 11, saves materials for preparing the first shell 11 and reduces the production cost; since the first housing 11 needs to be connected to only one side of the second housing 12, the connection of the first housing 11 and the second housing 12 is simplified.

As shown in fig. 1 and fig. 2, the first housing 11 and the second housing 12 are at the same height, after the housing structure is disposed in the accommodating cavity, the upper end of the first housing 11 and the outer top wall of the second housing 12 are respectively abutted to the inner top wall of the housing 201, and the end of the other side wall of the second housing 12 is in sealing connection with the side wall of the housing 201, so that the tightness of the microwave radiating air duct is ensured.

The upper end surface of the first housing 11 is horizontal and is in fit and sealing connection with the inner top wall of the housing 201. Specifically, the upper end of the first housing 11 extends along a direction perpendicular to the plate surface of the first housing 11 to form a first flange 111, and the first flange 111 is attached to the inner top wall of the housing 201. The first flange 111 is provided with a connecting hole 113, and the upper end of the first housing 11 is connected with the inner top wall of the housing 201 through the connecting hole 113.

The end surface of the lower end of the first shell 11 is horizontal, and is in fit and sealing connection with the outer top wall of the inner shell 202. Specifically, the lower end of the first housing 11 extends along a direction perpendicular to the plate surface of the first housing 11 to form a second flange 112, and the second flange 112 is attached to the outer top wall of the inner housing 202. The second flange 112 is provided with a connecting hole 113, and the lower end of the first housing 11 is connected with the outer top wall of the inner housing 202 through the connecting hole 113. Preferably, the folding direction of the second flange 112 is the same as the folding direction of the first flange 111.

Further, the connecting hole 113 is a screw hole, and the first housing 11 is screwed to the outer housing 201 and the inner housing 202, respectively.

The flanging arranged on the first shell 11 is convenient for the connection between the first shell 11 and the outer shell 201 and the inner shell 202, improves the sealing effect of the connection part, and further ensures the sealing performance of the microwave radiating air duct.

As shown in fig. 3 and 4, the housing structure is provided with a plurality of wire guides 17 extending through the wall of the housing structure, respectively, for wires passing through the associated electronic components.

The plurality of wire guides 17 include a hole structure 171 disposed at an upper portion of the first housing 11, the hole structure 171 is in a non-closed semi-open shape, and the first housing 11 and the housing 201 are cooperatively connected to form a closed wire guide 17.

As an embodiment, as shown in fig. 3, the hole structure 171 is provided with at least two open sides facing the top wall of the housing 201 and/or the rear wall of the housing 201, respectively.

The inner circumference of the wire guide 17 is provided with a sealing protection bushing for protecting the wire and sealing the connection of the wire and the wire guide 17. Preferably, the seal protection bushing is an elastic seal structure. The sealing protection bushing is beneficial to the sealing of the air shell structure 1, can play a role in protecting the wires and the air shell structure 1, and prevents the wires from rubbing the wire guide 17 in the process of penetrating the wire guide 17 and in the process of working the microwave oven, and scratches the wires and the air shell structure 1.

As shown in fig. 4, the microwave radiating wind tunnel system of the present invention further includes a mounting portion 120 disposed on the top wall and/or the side wall of the wind housing structure 1 for mounting electronic components, which is configured not to contact the outer top wall of the inner housing 202 after the electronic components are mounted on the second housing 12.

The mounting portion 120 includes a limiting unit 122, disposed on a top wall and/or a side wall of the air shell structure 1, and configured to cooperate with the air shell structure 1 to form a mounting area for limiting an electronic component; and a connection unit 121 disposed on a top wall and/or a side wall of the case structure 1, for connecting with an electronic component to fixedly mount the electronic component on a mounting area of the case structure 1.

The air shell structure 1 is provided with the mounting part 120 for mounting electronic components, and related electronic components can be mounted on the top wall and/or the side wall of the air shell structure 1 through the mounting part 120, so that the electronic components to be radiated are prevented from being incapable of being in direct contact with related structures on the microwave oven, and the arrangement is inconvenient.

Further, the mounting portion 120 is provided on the top wall of the second housing 12; preferably, the mounting portion 120 is disposed outside the top wall of the second housing 12, and radiates heat to the electronic component through the top wall of the second housing 12, thereby preventing the electronic component from contacting the inner case 202 after being mounted on the second housing 12.

As shown in fig. 4, the top wall of the second housing 12 has a downward bending section, and the mounting portion 120 is disposed outside the downward bending section.

The limiting unit 122 is disposed at the outer side of the downward bending section, and the limiting unit 122 is matched with the downward bending section to form the installation area. The electronic component may be disposed on a side of the limiting unit 122 facing the downward bending section, so as to prevent the electronic component from slipping along the inclined surface, and the side of the downward bending section located on the side of the limiting unit 122 facing the downward bending section is configured as the mounting area.

The limiting units 122 are provided at least two along the width direction of the second housing 12 to improve the supporting force and stability of the electronic component to be mounted.

As shown in fig. 4, the limiting unit 122 has a triangular support structure, and is used for matching the shape of the surface of the electronic component with the contact position of the electronic component, so as to improve the supporting force and stability.

The two sets of limiting units 122 are distributed along the length direction of the second housing 12, and a mounting area for placing and mounting electronic components is formed between the two sets of limiting units 122.

The connection unit 121 is disposed at the outer side of the downward bending section, and cooperates with related fasteners to fix the electronic component in the mounting area of the downward bending section.

As an embodiment, as shown in fig. 4, two connection units 121 are provided, which are disposed opposite to each other along the length direction of the second housing 12, and are in a mounting post structure. Preferably, at least one of the connection unit 121 and the limiting unit 122 is of an integral structure.

The heat dissipation air duct system further comprises an air inlet, wherein the air inlet is arranged on one side of the air shell structure 1, provided with the first shell 11; the air outlet 14 is arranged at one side of the air shell structure 1, where the second shell 12 is arranged.

The first housing 11 is at least matched with the outer housing 201 to form the air inlet, specifically, as shown in fig. 1, the air inlet is formed by matching the first housing 11 with the left side wall, the top wall of the outer housing 201 and the top wall of the inner housing 202.

The air outlet 14 is arranged on the second shell 12; further, the downward bending section is located at one end of the second housing 12 provided with the air outlet 14; the port of the air outlet 14 overlaps the end of the downward bending section, and the port of the air outlet 14 is configured as the end of the installation area.

As shown in fig. 1 and 2, an end of the first housing 11 far from the second housing 12 is connected to the rear wall of the housing 201 and configured such that the air inlet is attached to the rear wall of the housing 201, and an end of the second housing 12 far from the first housing 11 is connected to the front plate 205 of the housing 201 and configured such that the air outlet 14 is attached to the front plate 205 of the housing 201.

The heat dissipation air duct system further comprises an air supply opening 26, which is arranged on the rear wall of the shell 201 and is connected with the air inlet of the air shell structure 1, and is used for ventilating the air shell structure 1; the air outlet is arranged on the front plate 205 of the shell 201, is positioned between the microwave oven door 204 and the control panel 203, is connected with the air outlet 14 of the air shell structure 1, and is used for discharging hot air after heat exchange in the air shell structure 1.

As shown in fig. 4, the air outlet 14 is expanded to two sides along the width direction of the second housing 12, and configured such that the width of the outlet end of the second housing 12 is greater than the width of other parts of the second housing 12, so as to facilitate air outlet and connection with the air outlet of the microwave oven.

The connection part between the air outlet 14 of the air shell structure 1 and the inner shell 202 and the front plate 205 is provided with a sealing part, which is used for sealing the connection part of the air shell structure 1, preventing the microwave radiating air duct from being communicated with the environment outside the microwave radiating air duct, improving the tightness of the air shell structure 1, preferably, the sealing part is arranged at the connection part between the two sides of the air outlet 14 along the width direction and the inner shell 202 and the front plate 205; further preferably, the sealing part is a sealing rib structure.

As shown in fig. 4, the wind housing structure 1 of the present invention further includes a wiring groove 15 provided on the top wall of the second housing 12, close to the mounting portion 120, located outside the top wall of the second housing 12 or penetrating the top wall of the second housing 12, for arranging wires of the electronic components mounted on the mounting portion 120.

As shown in fig. 4, the second casing 12 includes, along the air outlet direction, a first section 1201 configured as a casing section of the second casing 12 close to the first casing 11, where a corresponding air duct portion is configured as a first channel, and one side wall of the first section 1201 is connected to the first casing 11, and the other side wall is connected to the side wall of the casing 201; the second section 1202 is configured as a casing section of the second casing 12, which is far away from the first casing 11, is connected to the front plate 205, is provided with the mounting portion 120, and the corresponding air duct portion is configured as a second channel, and the tail portion forms the air outlet 14. The second section 1202 is bent downwards from the connection part with the first section 1201 along the air outlet direction to form the downward bending section, and the tail end of the second section 1202 is configured as the tail end of the downward bending section.

As shown in fig. 1 and 2, the region of the receiving space outside the housing structure 1 forms a main cooling duct for cooling the oven electronics. The microwave electronic component comprises a magnetron 23, which is arranged in the first channel and used for radiating heat to the magnetron 23; the mounting portion 120 is configured to mount the high-voltage capacitor 21, and the second channel is configured to dissipate heat from the high-voltage capacitor 21; the first air duct is used for arranging the transformer 22 or the inverter 29, and ventilation dissipates heat of the transformer 22 or the inverter 29.

As shown in fig. 4, an opening 12011 is formed on a side wall of the first section 1201 on the side connected to the first housing 11, for passing through the waveguide so as to connect the waveguide with the magnetron 23, and the opening 12011 is rectangular and has a size and shape matching those of the waveguide.

As an embodiment, as shown in fig. 1 and 4, a side of the opening 12011 facing the first housing 11 is open, and the first housing 11 and the second housing 12 are connected and cooperate to close the opening on the side.

As shown in fig. 1 and 2, the first air duct has a rectangular structure, the volume of the first air duct is larger than that of the first channel, and the volume of the first channel is larger than that of the second channel. The first air duct is larger in volume, and can meet the requirements of the transformer 22 on the installation space and the requirements of the inverter 29 on the installation space. The first passage formed by the first section 1201 is matched with the structure of the magnetron 23, the whole is approximately rectangular in structure, and the wiring groove 15 is provided on the top wall of the first section 1201.

The heat dissipation air duct can realize that the air duct is only used for dissipating heat of the microwave electronic components of the microwave oven, can improve the heat dissipation efficiency of the microwave electronic components, and can also prevent the oven electronic components and the microwave electronic components from generating heat differently and interfering with each other after heating.

Another object of the present invention, as shown in fig. 1 and 2, is to provide a microwave oven 2 with the above-mentioned cooling duct system.

If the microwave oven 2 is a fixed frequency microwave oven, as shown in fig. 1, the microwave electronic component includes a transformer 22 disposed in the first air duct and fixed on the top wall of the inner housing 202; the high-voltage capacitor 21 is disposed on the mounting portion 120 of the wind housing structure 1 and is located on the top wall of the second section 1202 of the second housing 12. The outer side of the downward bending section is matched with the upper inner wall of the shell 201 to form an accommodating space capable of accommodating the high-voltage capacitor 21.

Because the high-voltage capacitor 21 has poor temperature tolerance relative to other electronic components, if the high-voltage capacitor 21 is too close to a heating pipe for generating heat below the inner shell 202 during the operation of the microwave oven 2, the heating pipe generates heat to greatly affect the high-voltage capacitor 21, and in order to ensure the performance and safety of the high-voltage capacitor 21, the high-voltage capacitor 21 needs to be arranged at a position far away from a heat source as far as possible, and because the heating pipe is generally arranged on the upper wall of the inner container in the inner shell 202, the high-voltage capacitor 21 is arranged on the outer top wall of the air shell structure 1, so that the high-voltage capacitor 21 can be prevented from contacting the inner shell 202, and further the high-voltage capacitor 21 is prevented from being far away from the heating pipe as far as possible.

If the microwave oven 2 is a variable frequency microwave oven, the microwave electronic component includes an inverter 29 disposed in a position of the cavity of the air shell structure 1 where the transformer 22 is disposed, i.e. in the first air duct.

In practical application, if the microwave oven 2 adopts a fixed-frequency microwave system, the high-voltage capacitor 21 can be correspondingly installed on the installation part 120, and if the microwave oven 2 adopts a variable-frequency microwave system, the installation part 120 can be empty without the high-voltage capacitor 21, namely, the air shell structure 1 is suitable for both the variable-frequency microwave system and the fixed-frequency microwave system, and the universality of the air shell structure 1 is improved.

In the semi-open type air shell structure 1, only the magnetron 23 is arranged inside the air shell structure 1, namely after the top wall of the shell 201 is removed, all microwave electronic components can be exposed and can be directly disassembled, so that the air shell structure 1 is convenient for after-sales maintenance and electronic component replacement. During final assembly, the semi-open type air shell structure 1 can be connected with a wire harness at last, and is convenient to install and high in efficiency.

The microwave oven 2 of the present invention further comprises a waveguide, which is disposed outside the housing structure 1 and in the main cooling air duct, and is connected to the magnetron 23 through the opening 12011.

The microwave oven 2 of the present invention further comprises a blower 24, which is disposed at the air inlet in the air shell structure 1, near the air supply opening 26, and located upstream of each microwave electronic component, and is configured to blow air from outside into the air shell structure 1 through the air supply opening 26.

As shown in fig. 3, the fan 24 is disposed on the second flange 112 of the first housing 11, and the second flange 112 corresponds to an area where the fan 24 is disposed, and has a shape and an area that match the bottom structure of the fan 24.

Working principle: (1) the microwave oven 2 is a fixed-frequency microwave oven 2: the fan 24 is started to blow air into the heat dissipation air duct, electronic components such as the transformer 22, the magnetron 23 and the like arranged along the air outlet direction are sequentially cooled through the heat dissipation air duct, then the air reaches the second channel of the heat dissipation air duct, the high-voltage capacitor 21 arranged on the outer top wall of the second section 1202 is cooled through the top wall of the second section 1202, and finally the air subjected to heat exchange is discharged outwards from the air outlet 14 through the air outlet. (2) The microwave oven 2 is a variable frequency microwave oven 2: the fan 24 is started to blow air into the heat dissipation air duct, and after the electronic components such as the inverter 29, the magnetron 23 and the like which are arranged along the air outlet direction are subjected to heat dissipation through the heat dissipation air duct, the heat-exchanged air is directly discharged outwards from the air outlet 14 through the air outlet.

The foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited to the above-mentioned embodiment, but is not limited to the above-mentioned embodiment, and any simple modification, equivalent change and modification made by the technical matter of the present invention can be further combined or replaced by the equivalent embodiment without departing from the scope of the technical solution of the present invention.

Claims (10)

1. The heat dissipation air duct system of the microwave oven comprises a main heat dissipation air duct for dissipating heat of an electronic element of the oven and a microwave heat dissipation air duct for dissipating heat of the electronic element of the microwave oven;

the heat dissipation air duct system comprises a heat dissipation air duct system,

a housing;

an inner shell arranged inside the outer shell, wherein the outer shell is matched with the inner shell to define at least one accommodating cavity;

the microwave heat dissipation device is characterized by further comprising a fan shell structure which is arranged in the accommodating cavity and is matched with the inner wall of the accommodating cavity to form the microwave heat dissipation air duct;

the wind-housing structure comprises a wind-housing structure,

a first air duct through which cooling air flows is formed in the first shell, or the first air duct is formed by matching with the inner wall of the accommodating cavity;

the second shell is arranged at the downstream of the first shell along the direction of cooling air flow, and a second air channel through which cooling air flow can pass is formed in the second shell or is matched with the inner wall of the accommodating cavity to form the second air channel;

the first air duct is communicated with the second air duct.

2. The system of claim 1, wherein the top of the first housing has an opening, and at least cooperates with the top wall of the housing to form a first air duct through which a cooling air flow passes;

the second shell is provided with a top wall, and the top wall is matched with the inner shell to form the second air duct;

preferably, the first housing and the second housing are connected to form the heat dissipation air duct.

3. The heat dissipation air channel system of a microwave oven according to claim 2, wherein the first housing has a plate-like structure, the upper and lower ends of the first housing are respectively connected with the outer top wall of the inner housing and the inner top wall of the outer housing, and the first housing cooperates with the inner housing and the outer housing to form the first air channel;

preferably, a side of the first housing facing the second housing is connected to a side wall of the second housing.

4. A heat dissipation duct system of a microwave oven as claimed in claim 2 or 3, further comprising a mounting portion provided on a top wall and/or a side wall of the air case structure for mounting electronic components;

the mounting portion may comprise a plurality of mounting portions,

the limiting unit is arranged on the top wall and/or the side wall of the air shell structure, and is matched with the air shell structure to form an installation area for limiting the electronic element;

and the connecting unit is arranged on the top wall and/or the side wall of the air shell structure and is used for being connected with the electronic component to fixedly install the electronic component in the installation area of the air shell structure.

5. The system of claim 4, wherein the mounting portion is disposed on the second housing;

preferably, the mounting portion is provided on a top wall of the second housing;

further preferably, the mounting portion is provided outside the second housing top wall.

6. The system of claim 5, wherein the top wall of the second housing has a downward bending section, the limiting unit is disposed outside the downward bending section, and the limiting unit cooperates with the downward bending section to form the mounting area.

7. The heat dissipation duct system of a microwave oven as claimed in any one of claims 4-6, further comprising,

the air inlet is arranged at one side of the air shell structure, provided with the first shell;

the air outlet is arranged on one side of the air shell structure, provided with the second shell;

the mounting part is arranged at one end of the second shell, which is provided with an air outlet;

preferably, the first shell is at least matched with the shell to form the air inlet.

8. The heat dissipation duct system of a microwave oven as claimed in any one of claims 4-7, wherein the second housing comprises,

the first section is configured as a shell section of the second shell, which is close to the first shell, and the corresponding air channel part is configured as a first channel;

the second section is configured as a casing section of the second casing far away from the first casing, is provided with the mounting part, and the corresponding air duct part is configured as a second channel.

9. The heat dissipation duct system of a microwave oven as claimed in claim 8, wherein the microwave electronic component includes a magnetron disposed in the first tunnel for dissipating heat from the magnetron;

the mounting part is used for mounting high-voltage capacitors, and the second channel is used for radiating the high-voltage capacitors.

10. A microwave oven having a cooling duct system according to any one of claims 1-9, wherein the microwave oven is a fixed frequency microwave oven comprising,

the transformer is arranged in the first air duct;

the high-voltage capacitor is arranged on the air shell structure;

or the microwave oven is a variable-frequency microwave oven, and comprises an inverter arranged at the position of the transformer in the cavity of the air shell structure.

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