An air inlet fan structure of a microwave oven

Abstract

The utility model relates to oven component technical field especially relates to a microwave oven air inlet fan structure. Including fan fixed plate, fan fixed plate sets up the board body structure of horizontal arrangement, the round ventilation groove is established at the center of fan fixed plate, and the round ventilation groove between fixed encapsulation has the intercepting net, and the one side of fan fixed plate is detachably provided with fan mounting plate, and fan mounting plate sets up the U-shaped board state structure, and the four combination screw holes are established in the center of fan mounting plate and are penetrated, and fan mounting plate is tightly assembled with machine frame through four combination screws, and the air inlet fan of air duct center is set up in the box of machine frame, and the filter screen of double -deck composite structure is slidably assembled to the side away from fan mounting plate of fan fixed plate. The utility model solves the technical problem that: the existing microwave oven air inlet fan installation position is hidden, and the dismounting is complex, and the filter screen cooperation degree is low, leads to inconvenient maintenance and poor air inlet sealing performance.

Description

Technical Field

[0001] This utility model relates to the field of oven component technology, and in particular to a microwave oven air intake fan structure. Background Technology

[0002] In addition to microwave energy, microwave ovens require a fan system to draw in cool air during the heating process to achieve balanced internal temperature control and heat dissipation protection for electronic components. Typically, the air intake system of a microwave oven consists of a fan, motor, and air filter, installed at the rear or top of the unit. It draws outside air into the cavity or control module area to prevent overheating of electronic components and extend the equipment's lifespan.

[0003] Currently, most microwave ovens on the market have their air intake fans fixed inside the metal casing, making installation in a concealed and cramped location, which greatly inconveniences subsequent maintenance or replacement. If the fan or motor fails, repair personnel often need to remove the outer casing and some internal structural components to perform the disassembly and reassembly, increasing maintenance costs and time. Meanwhile, the air intake often has a removable filter to block dust and grease, but existing filters are mostly fixed with a loose-fitting mechanism, which has low precision. This can easily lead to problems such as being too tight, making disassembly difficult, or too loose, causing poor sealing, affecting air filtration and airflow stability. Furthermore, some models lack an integrated design between the fan and filter, which can easily obstruct airflow or cause dust accumulation in the sealing gaps, hindering long-term heat dissipation performance. Overall, there is still room for improvement in the installation, maintenance, and sealing compatibility of existing air intake systems. Utility Model Content

[0004] The technical problem to be solved by this utility model is that the installation position of the air intake fan of the existing microwave oven is hidden, the disassembly and assembly are complicated, the filter screen has low fit, resulting in inconvenient maintenance and poor air intake sealing performance.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a microwave oven air intake fan structure, including a fan fixing plate, the fan fixing plate being configured as a horizontally placed plate structure, a circular ventilation groove being opened at the center of the fan fixing plate, and an intercepting net being fixedly encapsulated between the circular ventilation grooves, a fan mounting plate being detachably provided on one side of the fan fixing plate, and the fan mounting plate being configured as a U-shaped plate structure, four combined screw holes being opened through the center of the fan mounting plate, the fan mounting plate being fastened to the frame by four combined screws, and an air intake fan with an air duct facing into the oven being provided at the center of the frame, and a double-layer composite filter screen being slidably mounted on the side of the fan fixing plate away from the fan mounting plate.

[0006] As a further improvement of this utility model, the outer layer of the filter screen is a 304 stainless steel woven mesh with a mesh size of 40~80, and the inner layer is a PTFE-coated glass fiber filter cloth with several pores, and the pore diameter is set to 0.3~0.6 mm.

[0007] As a further improvement of this utility model, a pair of filter guide rails are fixedly provided on the side of the fan fixing plate away from the fan mounting plate. The inner side of the filter guide rails is provided with sliding grooves, and the two ends of the filter are slidably connected to the sliding grooves.

[0008] As a further improvement of this utility model, a pair of magnetic blocks are fixedly provided on the side of the fan mounting plate away from the filter guide plate, and the two ends of the fan mounting plate are reliably attracted to the magnetic blocks.

[0009] As a further improvement of this utility model, mounting screw holes are provided at all four corners of the fan fixing plate, and mounting bolts that are fastened to the housing are threaded into the mounting screw holes.

[0010] As a further improvement of this utility model, the interception net is set as a 304 stainless steel perforated mesh plate.

[0011] The beneficial effects of this utility model are as follows: By setting a separate magnetic connection structure between the fan fixing plate and the fan mounting plate, the problems of concealed installation location and complex disassembly / removal of the existing microwave oven air intake fan are solved. This allows the fan assembly to be quickly replaced and maintained without disassembling the outer shell, significantly shortening the maintenance cycle and reducing labor costs. The guide cooperation between the filter guide plate and the sliding groove allows the filter to be smoothly inserted and removed along the guide rail direction, overcoming the defects of traditional snap-on filters, such as low fit and tendency to be too tight or too loose, ensuring assembly sealing and ease of disassembly / removal. The double-layer composite filter structure, consisting of a stainless steel woven outer layer and a PTFE-coated glass fiber inner layer, achieves oil and corrosion resistance and high-efficiency filtration under high-temperature environments, extending the filter's service life and reducing cleaning frequency. Attached Figure Description

[0012] Figure 1 This is an assembly diagram of the air inlet fan structure of a microwave oven according to this utility model;

[0013] Figure 2 This is an overall view of the structure of the air inlet fan of a microwave oven according to this utility model;

[0014] Figure 3 This is a component assembly diagram of a microwave oven air inlet fan structure according to this utility model.

[0015] As shown in the figure: 1. Fan mounting plate; 2. Interception net; 3. Fan mounting plate; 4. Frame; 5. Filter screen; 6. Filter screen guide plate; 7. Magnetic block; 8. Mounting bolts. Detailed Implementation

[0016] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly mentioned in this specification are defined relative to their structure and are relative concepts. Therefore, they may vary depending on their location and usage; thus, these or other directional terms should not be interpreted as restrictive terms.

[0017] The singular forms “a,” “the,” and “the” used in this specification are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes one or more of the associated listed items, any or all possible combinations thereof.

[0018] To make the technical problems to be solved, the technical solutions, and the beneficial effects of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0019] This utility model provides a microwave oven air inlet fan structure, including a fan fixing plate 1;

[0020] As attached Figure 1 , 2 As shown in Figure 3, the fan mounting plate 1 is a horizontally positioned plate structure. A circular ventilation slot is formed at the center of the fan mounting plate 1, and an intercepting mesh 2 is fixedly encapsulated between the circular ventilation slots. The intercepting mesh 2 is made of 304 stainless steel perforated mesh plate; it is used to block foreign objects and prevent scratching the fan blades. A fan mounting plate 3 is detachably mounted on one side of the fan mounting plate 1. The fan mounting plate 3 is a U-shaped plate structure, with four combined screw holes running through its center. The fan mounting plate 3 is fastened to the frame 4 by four combined screws. An air intake fan with an air duct facing into the housing is located at the center of the frame 4. A pair of magnetic blocks 7 are fixedly mounted on the side of the fan mounting plate 1 away from the filter guide plate 6, and both ends of the fan mounting plate 3 are reliably attracted to the magnetic blocks 7. Mounting screw holes are formed at all four corners of the fan mounting plate 1, and mounting bolts 8 are threaded into these holes and fastened to the housing; they are used to secure the entire device to the housing.

[0021] As attached Figure 2 , 3As shown, a double-layer composite filter screen 5 is slidably mounted on the side of the fan mounting plate 1 away from the fan mounting plate 3. A pair of filter screen guide rails 6 are fixedly installed on the side of the fan mounting plate 1 away from the fan mounting plate. The inner side of the filter screen guide rails 6 has sliding grooves, and the two ends of the filter screen 5 are slidably connected to the sliding grooves, which facilitates quick disassembly of the filter screen 5. The outer layer of the filter screen 5 is made of 304 stainless steel woven mesh with a mesh size of 40~80; it is resistant to high temperature and oil corrosion, has high mechanical strength, and is suitable for frequent disassembly and cleaning. The inner layer is made of PTFE-coated glass fiber filter cloth with several pores, and the pore size is set to 0.3~0.6 mm; it has good high temperature stability and oil resistance, high interception efficiency for oil mist and fine particles, and the coating makes it difficult for oil stains to penetrate into the fiber, extending the cleaning cycle.

[0022] Working Principle: In practical implementation, the fan mounting plate 1 is securely connected to the outer casing via mounting bolts 8, forming an independent mounting base for the air intake assembly. During operation, external air enters through the circular ventilation slot in the center of the fan mounting plate 1. After passing through the interceptor mesh 2, the airflow is guided through the interior of the frame 4 to the fan mounting plate 3. The intake fan generates negative pressure suction, continuously drawing air into the machine cavity or electronic component area, achieving temperature balance and component heat dissipation within the oven. The fan mounting plate 3 adopts a U-shaped structure, with both ends reliably attached to the fan mounting plate 1 via magnetic blocks 7. For maintenance or replacement, it can be quickly separated manually without tools. A filter guide rail 6 is located on the side of the fan mounting plate 1 away from the fan mounting plate 3. A sliding groove is formed on the inner side of the guide rail 6, and the double-layer composite filter 5 is embedded in the sliding groove at both ends for guided sliding. During use, air passes through a stainless steel woven outer layer and a PTFE-coated glass fiber inner layer for efficient oil mist and particulate filtration, ensuring clean airflow and stable air volume entering the machine cavity. The filter screen 5 can be pulled out along the filter screen guide plate 6, enabling quick disassembly and cleaning, and ensuring long-term stable filtration performance. During operation, the fan mounting plate 1, the frame 4, and the fan mounting plate 3 form a closed and stable air intake channel.

[0023] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A microwave oven air intake fan structure, comprising a fan mounting plate (1), characterized in that: The fan mounting plate (1) is a horizontally placed plate structure. A circular ventilation groove is provided in the center of the fan mounting plate (1), and an intercepting net (2) is fixedly encapsulated between the circular ventilation grooves. A fan mounting plate (3) is detachably provided on one side of the fan mounting plate (1), and the fan mounting plate (3) is a U-shaped plate structure. Four combined screw holes are provided through the center of the fan mounting plate (3). The fan mounting plate (3) is fastened to the frame (4) by four combined screws. An air intake fan with an air duct facing the box is provided in the center of the frame (4). A double-layer composite filter (5) is slidably installed on the side of the fan mounting plate (1) away from the fan mounting plate (3).

2. The microwave oven air inlet fan structure according to claim 1, characterized in that: The outer layer of the filter screen (5) is a 304 stainless steel woven mesh with a mesh size of 40~80, and the inner layer is a PTFE-coated glass fiber filter cloth with several pores, and the pore size is set to 0.3~0.6 mm.

3. The microwave oven air inlet fan structure according to claim 2, characterized in that: A pair of filter guide rails (6) are fixedly installed on the side of the fan mounting plate (1) away from the fan mounting plate. The filter guide rails (6) have sliding grooves on their inner sides, and the two ends of the filter (5) are slidably connected to the sliding grooves.

4. The microwave oven air inlet fan structure according to claim 3, characterized in that: A pair of magnetic blocks (7) are fixedly installed on the side of the fan mounting plate (1) away from the filter guide plate (6), and the two ends of the fan mounting plate (3) are reliably attracted to the magnetic blocks (7).

5. The microwave oven air inlet fan structure according to claim 1, characterized in that: The fan mounting plate (1) has mounting screw holes at all four corners, and mounting bolts (8) that are fastened to the housing are threaded into the mounting screw holes.

6. The microwave oven air inlet fan structure according to claim 1, characterized in that: The interception net (2) is made of 304 stainless steel perforated mesh plate.

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