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Multiple vanes for blower

A blower, multi-blade technology, applied in the direction of mechanical equipment, machine/engine, liquid fuel engine, etc., can solve the problems of reduced air supply characteristics and noise characteristics, insufficient pressure recovery, etc.

Inactive Publication Date: 2004-02-25
SANDEN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the portion where the relative velocity of the air flowing between the outer diameter ends 2b is increased may cause insufficient pressure recovery, and may degrade air blowing characteristics and noise characteristics at the operating point of high pressure loss.

Method used

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Examples

Experimental program
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Embodiment Construction

[0020] Figure 1 to Figure 4 One embodiment of the multi-blade blower of the present invention is shown.

[0021] When describing the multi-blade blower of the present invention, first refer to figure 1 An outline of a vehicle air conditioner equipped with such a blower will be described.

[0022] The air-conditioning system 10 of the vehicle has an air-conditioning duct 20 through which air-conditioning air is conducted. In the air-conditioning duct 20, a multi-blade blower 30, an evaporator 40 as a structural part of a refrigeration circuit, and a heating zone 50 supplied with hot water from a heat exchanger are sequentially arranged from the windward side toward the leeward side. Furthermore, an outside air suction port 60a and an inside air suction port 60b are provided on the windward side of the air-conditioning duct 20 . The leeward side of the air-conditioning duct 20 is provided with an upper air outlet 60c for defrosting, an upper air outlet 60d that blows toward...

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PUM

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Abstract

Air flows along pressure surfaces and suction surfaces of main blades of an inner blade group by rotation of an impeller. When the air passes the inner blade group, the air flowing along the suction surfaces of the main blades tends to separate from the suction surfaces, and shearing flows tend to be formed behind outer diameter end portions of the main blades. Here, the auxiliary blades of the outer blade group are placed inside the air flows passing between the main blades of the inner blade group, and therefore the auxiliary blades restrain the separation of air flows, and the shearing flows.

Description

technical field [0001] The present invention relates to a multi-blade blower installed in an air conditioner or the like of a vehicle. Background technique [0002] The multi-blade blower has an impeller having a plurality of blades arranged in the circumferential direction around the rotating shaft, and when the impeller rotates, air is sucked in from the inner diameter end side of the blade and discharged from the outer diameter end side. The air supply performance such as air supply capacity and noise of the multi-blade blower depends on the shape of the blades and the shape of the casing of the retractable impeller. In the multi-blade blower, since the length of the blades in the direction of air flow is short, it is difficult to form an air flow that flows along the blades, and vortices are generated due to separation of the air flow. Such eddy currents cause reduction in air blowing capacity and increase in noise. [0003] In order to solve the above problems, the ap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/28F04D29/30
CPCF04D29/282
Inventor 北爪三智男
Owner SANDEN CORP