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Fan and microwave oven

A technology of microwave ovens and fans, which is applied to household stoves/stoves, lighting and heating equipment, heating fuel, etc., and can solve problems such as increased noise levels, reliability, safety issues, and increased motor loss

Pending Publication Date: 2018-06-19
GUANGDONG MIDEA KITCHEN APPLIANCES MFG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the fan speed increases and the flow rate increases, its noise level will also increase accordingly, and the high speed of the motor will increase the loss of the motor, increase the cost, and also cause reliability and safety problems

Method used

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  • Fan and microwave oven
  • Fan and microwave oven
  • Fan and microwave oven

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Embodiment Construction

[0041] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0042] In the present invention, unless stated to the contrary, the used orientation words such as "up, down, top, bottom" generally refer to the directions shown in the drawings or refer to the vertical, perpendicular or gravitational directions The terms used to describe the mutual positional relationship of the various components mentioned above.

[0043] for existing figure 2 As shown in the conventional fan with uniform blade thickness along the direction from the leading edge 223 to the trailing edge 224 of the blade, since the "lift-to-drag ratio" of the blade section is relatively small, the efficiency of the fan is low, and the heat dissipation is rel...

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Abstract

The invention discloses a fan and a microwave oven. The fan comprises a hub (22) and multiple blades (22) which are arranged at intervals in the circumferential direction of an outer ring (211) of thehub (21), the blade thickness of the blade-shaped cross section of the blades (22) is gradually reduced from leading edges (223) to tailing edges (224) of the blades, and the blade-shaped cross section is cut out from a radial concentric circle of the outer ring (211) of the hub (21). Therefore, the fan has large stall margin, even if the incoming flow of the inlet blast capacity is high incidence, the separation of boundary layers still cannot occur on the blades, thus generation of stall is avoided, and normal work can still be conducted. Meanwhile, the fan has higher adaptability to the inlet incoming flow, the aerodynamic performance of the fan is better, the blast capacity is larger, and the efficiency is higher. Besides, due to the design of sharp angles of trailing edges of the blades, the tails of the blades are a series of fragmentized small vortex structures, the generation of high broad-band noise is avoided, and thus a certain noise-reduction effect is achieved.

Description

technical field [0001] The invention relates to the field of household appliances, in particular to a fan and a microwave oven. Background technique [0002] At present, microwave ovens have been widely used in people's lives as utensils for heating food. A microwave oven consists of a power supply, a magnetron, a control circuit, and a cooking cavity. The interior of the microwave oven mainly uses the axial flow fan assembly to dissipate heat from components such as transformers, frequency converters, and magnetrons. The axial flow fan assembly mainly includes fan blades, a collector cover, a fan bracket and a motor. During the operation of the axial flow fan, there is a positive correlation between the flow and the noise. When the fan speed increases and the flow rate increases, its noise level will also increase accordingly, and the high speed of the motor will increase the loss of the motor, increase the cost, and also cause reliability and safety problems. With the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/38F04D29/66F24C7/02
CPCF04D29/384F04D29/666F24C7/02
Inventor 赵涛陈金鑫林健行晓亮彭定元黄志飞
Owner GUANGDONG MIDEA KITCHEN APPLIANCES MFG CO LTD
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