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Air inlet ring assembly, centrifugal fan and range hood

A centrifugal fan and air inlet ring technology, applied in the direction of oil fume removal, machine/engine, pump components, etc., can solve the problems of reduced fan efficiency, poor pre-rotation effect, and difficult to improve smoking effect, so as to reduce impact noise and improve performance Effect

Pending Publication Date: 2022-04-15
HANGZHOU ROBAM APPLIANCES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The smoking effect of the range hood is one of the important indicators of the quality of the range hood. Among them, the multi-blade centrifuge, as the core component of the range hood, plays a decisive role in the smoking effect of the range hood; Influenced by the way of air, the flow of the air intake at the air inlet of the centrifugal fan is uneven, and the smoking effect is difficult to improve; the uneven air intake will also lead to serious air flow shunting in the blade flow channel, which reduces the effective flow area of ​​the air flow , the efficiency of the fan is reduced, and the vortex impact noise of the air duct is significant, so the uneven airflow at the air inlet of the centrifugal fan seriously affects the smoking effect of the hood, easily pollutes the kitchen air environment, and affects the user experience
[0003] In order to solve the problem of uneven air intake of the fan, the multi-wing centrifuges currently on the market usually have pre-rotation measures at the air inlet to pre-rotate the intake air and adjust the angle at which the intake air enters the fan. However, the existing pre-rotation measures The pre-rotation effect is poor, and the pre-rotation state cannot be adjusted according to the actual operating conditions of the fan

Method used

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  • Air inlet ring assembly, centrifugal fan and range hood
  • Air inlet ring assembly, centrifugal fan and range hood
  • Air inlet ring assembly, centrifugal fan and range hood

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1 of the present application provides an air intake ring assembly, such as figure 1 As shown, it is used to be installed at the air inlet 11 of the centrifugal fan 1 (hereinafter referred to as the fan), so as to pre-swirl the air inlet at the air inlet 11.

[0040] Such as figure 1 and figure 2 As shown, the wind inlet coil assembly provided by Embodiment 1 of the present application includes a wind coil main body 2 , a plurality of pre-rotation assemblies 3 and a power assembly 4 . The wind coil main body 2 is ring-shaped, and the wind coil main body 2 is installed on the casing of the fan, and the wind coil main body 2 is arranged on the outside of the air inlet 11 around the axis of the air inlet 11 of the fan. A plurality of pre-rotation assemblies 3 are distributed on the wind ring main body 2 at intervals around the axis of the air inlet 11, and the plurality of pre-rotation assemblies 3 have the same deflection angle. It should be noted that the de...

Embodiment 2

[0056] Embodiment 2 of the present application provides another air inlet ring assembly. The air inlet ring assembly in Embodiment 2 is similar to the air inlet ring assembly in Embodiment 1. The only difference lies in the shape and structure of the deflector 31. Hereinafter, The differences between the second embodiment and the first embodiment will be mainly described.

[0057] different from image 3 The air guide 31 of the shown airfoil structure, in the second embodiment, is as Figure 5 and Figure 6 As shown, the flow guide 31 is in the shape of a blade, and the first flow guide part 311 and the second flow guide part 312 are also in the shape of adapted blades, so that they are assembled at relative intervals along the axial direction of the rotating shaft 33 to form a complete Guide vanes.

[0058]For the vane-shaped first guide part 311, in order to install the rotating shaft 33 and the transmission gear 32, the first guide part 311 is provided with a first conne...

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Abstract

The invention relates to the technical field of kitchen electric equipment, in particular to an air inlet ring assembly, a centrifugal fan and a range hood. The air ring assembly comprises an air ring main body surrounding the outer side of an air inlet of the fan, a plurality of pre-swirling assemblies and a power assembly, the multiple pre-swirling assemblies are circumferentially distributed on the air ring main body at intervals, and a pre-swirling flow channel is formed between every two adjacent pre-swirling assemblies; the multiple pre-rotation assemblies are rotationally connected with the air ring body, the power assembly is arranged on a shell of the draught fan, the power assembly drives the multiple pre-rotation assemblies to deflect by the same angle at the same time, and therefore the deflection angles of the pre-rotation assemblies can be actively and accurately controlled according to different working conditions, inlet air flow is guided to different degrees, and the air inlet efficiency is improved. Different degrees of pre-whirling airflow are generated, reasonable deflection of the inlet airflow is achieved, the optimal pre-whirling effect is achieved under different working conditions, the performance of the centrifugal fan is improved, and impact noise caused by airflow separation of an air inlet runner is weakened.

Description

technical field [0001] The present application relates to the technical field of kitchen appliances, in particular to an air intake ring assembly, a centrifugal fan and a range hood. Background technique [0002] The smoking effect of the range hood is one of the important indicators of the quality of the range hood. Among them, the multi-blade centrifuge, as the core component of the range hood, plays a decisive role in the smoking effect of the range hood; Influenced by the way of air, the flow of the air intake at the air inlet of the centrifugal fan is uneven, and the smoking effect is difficult to improve; the uneven air intake will also lead to serious air flow shunting in the blade flow channel, which reduces the effective flow area of ​​the air flow , the efficiency of the fan is reduced, and the vortex impact noise of the air duct is significant. Therefore, the uneven airflow at the air inlet of the centrifugal fan seriously affects the smoking effect of the hood, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D25/08F04D29/42F04D29/44F04D29/46F24C15/20
Inventor 任富佳吴童陈建卫周海昕余国成郑桐福
Owner HANGZHOU ROBAM APPLIANCES CO LTD