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 a

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

Example Embodiment

[0057] Example 1

[0058] Such as 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 in series. The air outlet of the centrifugal fan is connected with the air inlet of the cross flow fan. The centrifugal fan and the cross flow fan are integrated in a structure and share the same structure. Impeller 3, same motor 4, 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 are formed by the centrifugal fan volute and the cross flow fan volute in parallel. The centrifugal fan volute is placed at the front end of the cross flow fan volute. A motor mounting structure is provided on the shell. 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 that is compatible with the rotation of the impeller, and an outlet for the centrifugal fan...

Example Embodiment

[0061] Example 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 difference between this embodiment and Embodiment 1 is only that the structure and shape of the volute assembly are different, and the shape of the construction hole plug and the length of the motor shaft used on the dual-function impeller are different.

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

Example Embodiment

[0067] Example 3

[0068] Such as Figure 13-16 As shown, the relay flow fan of this embodiment is composed of a centrifugal fan 1 and a cross flow fan 2 in series. The air outlet of the centrifugal fan is connected to the air inlet of the cross flow fan. The centrifugal fan and the cross flow fan are connected in a conjoined 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 includes at least a front cover 5.1-1, a rear cover 5.1-2, and a volute wall 5.1-3. On the plane section of the volute wall corresponding to the air outlet channel of the centrifugal fan, an air outlet 5.1-3a is provided 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 channel 5.2-4 of the cross flow fan is closed, and the air inlet channel of the cross flow fan The corresponding volute wall plane s...

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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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