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Relay flow fan and extractor hood with same

A technology of flow fan and cross-flow fan, applied in the field of range hood, can solve the problems of reducing air volume, reducing fan efficiency, separating and purifying difficult oil molecules, etc., and achieving the effect of long air supply distance, wide application and large air volume

Inactive Publication Date: 2013-09-25
吴钰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fan involved in the prior art is still difficult to more effectively separate and purify the oil molecules in the oil fume; using different types of filters to purify the oil fume will increase the resistance in the air duct, reduce the efficiency of the fan, and reduce the air volume
The outlet speed of the fan not only involves the air volume of the fan, but also has an important impact on the emission of oil fume and the prevention of backflow in the oil fume discharge; increasing the air volume and outlet speed of the fan by increasing the fan speed or increasing the diameter of the wind wheel will cause vibration and noise increase, increasing the diameter of the wind wheel will also be limited by the structural size of the range hood

Method used

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  • Relay flow fan and extractor hood with same
  • Relay flow fan and extractor hood with same
  • Relay flow fan and extractor hood with same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] like Figure 1~6 As shown, the relay flow fan of this embodiment is composed of a centrifugal fan 1 and a cross-flow fan 2 connected in series. The air outlet of the centrifugal fan is connected with the air inlet of the cross-flow fan. The impeller 3, the same motor 4, and the same volute assembly 5.

[0059] The volute assembly 5 includes at least a centrifugal fan volute 5.1 and a cross-flow fan volute 5.2, which is composed of a centrifugal fan volute and a cross-flow fan volute connected in parallel. The centrifugal fan volute is placed at the front end of the cross-flow fan volute, and the cross-flow fan volute The shell is provided with a motor installation structure. The centrifugal fan volute is composed of a front cover 5.1-1, a rear cover 5.1-2, and a volute wall 5.1-3. The rear cover is provided with an opening 5.1-4 suitable for the rotation of the impeller, and is provided with a centrifugal fan outlet. The opening connecting the channel and the inlet ch...

Embodiment 2

[0062] This embodiment and embodiment 1 belong to the typical structure of the first technical solution of the present invention, such as Figure 7-12 As shown, the only difference between this embodiment and Embodiment 1 is that the structure and shape of the volute assembly are different, the shape of the construction hole plugging cover used on the dual-function impeller and the length of the motor shaft are different.

[0063] In the volute assembly in this embodiment, the front cover 5.1-1 of the centrifugal fan volute and the volute wall 5.1-3 are integrated to form an integral centrifugal fan volute main body 5.1A, and a mounting edge 5.1A is provided around it -1; the back cover 5.2-2 of the volute of the cross-flow fan is integrated with the volute wall 5.2-3 to form an integral cross-flow volute main body 5.2A, and its periphery is also provided with a mounting edge 5.2A-1; Between the volute main body of the type centrifugal fan and the volute main body of the integ...

Embodiment 3

[0068] like Figures 13 to 16 As shown, the relay flow fan of this embodiment is composed of a centrifugal fan 1 and a cross-flow fan 2 connected in series, the air outlet of the centrifugal fan communicates with the air inlet of the cross-flow fan, and the centrifugal fan and the cross-flow fan are of a connected structure. The impeller, motor, and volute assembly; the air inlet channel of the cross-flow fan is closed.

[0069] The volute assembly of the centrifugal fan at least includes a front cover 5.1-1, a rear cover 5.1-2, and a volute wall 5.1-3, and an air outlet 5.1-3a is provided on the plane section of the volute wall corresponding to the outlet channel of the centrifugal fan ; The volute assembly of the cross-flow fan includes at least the left end cover 5.2-1, the right end cover 5.2-2, and the volute wall 5.2-3. The air inlet 5.2-3a is provided on the corresponding volute wall plane section; the flanging riveting structure 5.3-3 is provided at the air outlet 5.1...

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Abstract

The invention discloses a relay flow fan composed of a centrifugal fan and a cross flow fan which are connected in series. A gas outlet of the centrifugal fan is communicated with a gas outlet of the cross flow fan, and the centrifugal fan and a cross flow fan are integrated or connected. The centrifugal fan and the cross flow fan perform relay acting to gas flow, and speed up gas flow relay to form relay flowing. The relay flow fan has the advantages of high gas-flow speed at outlet, large gas capacity, high gas pressure, long gas blowing space and the like, and further has properties of performing relay separation, relay condensation and relay purification to fume. An extractor hood with the relay flow fan can really realize fume discharging to be eliminated. By the aid of the relay flow fan, important support is provided for 'green' development of the industry of extractor hoods, and novel selections are provided for the fields of gas blowing, gas changing and air purifying. The relay flow fan is a new member in a fan family; the relay flow fan has various structures, and can meet different requirements; the relay flow fan can be promoted and applied to produce great social benefit and economic benefit.

Description

technical field [0001] The invention relates to a fan, in particular to a relay flow fan, and also to a range hood equipped with a relay flow fan. Background technique [0002] For range hoods, fans play a vital role in the purification and emission of oil fumes. The fan involved in the prior art is still difficult to more effectively separate and purify the oil molecules in the oil fume; using different types of filters to purify the oil fume will increase the resistance in the air duct, reduce the efficiency of the fan, and reduce the air volume . The outlet speed of the fan not only involves the air volume of the fan, but also has an important impact on the emission of oil fume and the prevention of backflow in the oil fume discharge; increasing the air volume and outlet speed of the fan by increasing the fan speed or increasing the diameter of the wind wheel will cause vibration And the increase of noise, increasing the diameter of the wind wheel will also be limited b...

Claims

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Application Information

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IPC IPC(8): F04D25/16F04D29/42F04D29/26
Inventor 吴钰吴成年
Owner 吴钰
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