Diagonal fan and household appliance

A technology of oblique flow fan and oblique flow wind wheel, which is applied in the direction of mechanical equipment, machine/engine, liquid fuel engine, etc. It can solve the problems of large differential pressure, influence of aerodynamic performance and noise performance of oblique flow fan, and fluctuation of flow field inside the impeller, etc.

Active Publication Date: 2019-11-29
MIDEA GRP CO LTD
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AI Technical Summary

Problems solved by technology

[0004] Under the condition of small flow rate, due to the large differential pressure between the pressure surface and the suction surface of the impeller, a strong blade tip leakage vortex appears under the combined action of the differential pressure on both sides and the underflow, forming a large number of vortices on the blade tip. However, when the flow rate of the diagonal flow fan is reduced to a certain extent, a large area of ​​backflow area can be observed in the blade t

Method used

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  • Diagonal fan and household appliance
  • Diagonal fan and household appliance
  • Diagonal fan and household appliance

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Embodiment Construction

[0043] In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0044] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited by the specific details disclosed below. EXAMPLE LIMITATIONS.

[0045] Refer below Figure 3 to Figure 5 Diagonal flow fans according to some embodiments of the present invention are described.

[0046] Such as image 3 and Figure 4 As shown, the oblique flo...

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Abstract

The invention provides a diagonal fan and a household appliance. The diagonal fan comprises a wheel cover assembly and a diagonal wind wheel. The wheel cover assembly comprises multiple sleeved wheelcovers, the wheel covers are provided with air inlets, the wheel cover located on the outer side stretches downstream relative to the wheel cover located on the inner side in any two adjacent wheel covers, a backflow passageway is formed between any two adjacent wheel covers, and the backflow passageways communicate with the air inlets. The diagonal wind wheel is partially arranged in the wheel cover on the innermost side in the multiple wheel covers. The diagonal wind wheel comprises a hub and multiple blades arranged on the hub, and the tops of the blades can correspond to inlets of the backflow passageways. By means of the technical scheme, the operating stability of the diagonal fan is improved, the pneumatic performance of the diagonal fan is improved, and meanwhile the probability that the blade frequency doubling noise is increased is reduced.

Description

technical field [0001] The invention relates to the field of home appliances, in particular to a diagonal flow fan and a home appliance. Background technique [0002] Diagonal flow fan, also known as mixed flow fan, is a type of fan between centrifugal fan and axial flow fan. This type of fan has the characteristics of higher exhaust pressure than axial flow fan and higher efficiency than centrifugal fan. It has become more and more popular in recent years. It has been applied more and more. In related technologies, the structure of the diagonal flow fan is as follows figure 1 and figure 2 As shown, the following defects still exist during operation: [0003] Under the working conditions with a relatively wide range of flow rates, flow separation or even backflow is prone to occur at the top of the blades of the oblique flow fan near the outlet, resulting in a wider stall zone for the oblique flow fan, which is shown as axial flow on the performance curve. The flow fan i...

Claims

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Application Information

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IPC IPC(8): F04D29/26F04D29/40F04D29/66
CPCF04D29/26F04D29/403F04D29/661F04D29/666
Inventor 胡小文张辉
Owner MIDEA GRP CO LTD
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