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Centrifugal fan blade, centrifugal fan and air conditioning device

A technology of centrifugal fan and centrifugal fan, which is applied in the field of centrifugal fan and air-conditioning equipment, and centrifugal fan, which can solve the problems of increasing the power consumption level of the motor load, reducing the efficiency of the centrifugal fan, and wasting materials, so as to reduce the cost and reduce the cost of the motor. Effects of load, prevention of secondary flow, reduction of noise and power consumption

Active Publication Date: 2016-10-12
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the air flow enters the flow channel from the inlet of the centrifugal fan blade through the leading edge of the blade, it turns and is sucked into the flow channel of the fan blade before it reaches the root of the leading edge of the blade, so that the root of the blade leading edge of the centrifugal fan blade cannot do work on the air flow , which not only wastes materials, but also increases the motor load in the centrifugal fan and causes an increase in the power consumption level of the motor, which further reduces the efficiency of the centrifugal fan

Method used

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  • Centrifugal fan blade, centrifugal fan and air conditioning device
  • Centrifugal fan blade, centrifugal fan and air conditioning device
  • Centrifugal fan blade, centrifugal fan and air conditioning device

Examples

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Effect test

Embodiment 1

[0043] Such as figure 1 with figure 2 As shown, this embodiment provides a centrifugal fan blade, which includes a front disc 1, a rear disc 2 and a plurality of blades 3. Wherein, the front disk 1 is provided with an air inlet 11 for axially entering the airflow into the centrifugal blade. An air outlet is arranged between the rear disc 2 and the front disc 1 to allow the centrifugal blades to discharge air radially. A plurality of blades 3 are evenly arranged between the front disc 1 and the rear disc 2; wherein, the front edge 31 of the blade 3 is set in the shape of the outer edge of a bird's wing (such as Figure 1 to Figure 3 The shape of the leading edge 31 of the blade, and as Figure 4 to Figure 6 The leading edge curve shape shown).

[0044] In this embodiment, the centrifugal fan blade is driven by the motor to axially suck the airflow into the centrifugal fan blade from the air inlet 11, enter the flow channel through the front edge 31 of the blade 3, and then flow o...

Embodiment 2

[0049] Preferably, as Figure 1 to Figure 3 As shown, this embodiment provides a centrifugal fan blade. Compared with the previous embodiment, the leading edge 31 of the blade 3 in this embodiment has a first end and a second end; the first end is close to the rear disc 2 The leading edge blade root 312, the second end is the leading edge blade tip 311 close to the front disc 1. Preferably, the leading edge blade root 312 in this embodiment is in contact with the plane of the inner bottom of the rear disc 2.

[0050] Wherein, the shape of the outer edge of the bird-like wing in this embodiment specifically refers to the curve shape change from the leading edge blade root 312 to the leading edge blade tip 311 sequentially showing concave and convex curves. The details are as follows: Figure 1 to Figure 6 As shown, in this embodiment, the front edge of the blade 3 is provided with protrusions 313 and recesses 314; wherein, the recesses 314 are located at the leading edge blade roo...

Embodiment 3

[0053] Preferably, this embodiment provides a centrifugal fan blade. Compared with the above embodiment, as Figure 1 to Figure 4 As shown, the concave portion 314 on the front edge of the blade in the centrifugal wind blade of this embodiment is located close to the front edge blade root 312. Correspondingly, the protrusion 313 and the recess 314 in this embodiment divide the leading edge of the blade into three sections with a smooth transition. Among them, the three sections of gentle transition include the first section from the leading edge tip 311 to the most convex part of the protrusion 313, and the second section from the most convex part of the protrusion 313 to the most concave part of the recess 314. , Gently transition from the deepest part of the recess 314 to the third section of the leading edge blade root 312. Among them, the third section in this embodiment is an arc-shaped structure that gently transitions from the deepest part of the recess 314 to the leadi...

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Abstract

The invention discloses a centrifugal fan blade, a centrifugal fan and an air conditioning device, and relates to the technical field of air conditioners. The mainly adopted technical scheme lies in that the centrifugal fan blade comprises a front disc, a back disc and a plurality of fan blades, wherein an air inlet is formed in the front disc; an air outlet is formed between the back disc and the front disc; the plurality of blades are uniformly distributed between the front disc and the back disc; the shape of the front edges of the blades imitates the shape of the outer edges of bird wings; an air current enters the centrifugal fan blade through the air inlet, enters a runner through the front edges of the blades, and flows out of the air outlet through the back edges of the blades; the centrifugal fan comprises the centrifugal fan blade; and the air conditioning device comprises the centrifugal fan. The invention mainly aims to improve the working efficiency of the centrifugal fan blade, the centrifugal fan and the air conditioning device and reduce the noise and power consumption of the centrifugal fan blade, the centrifugal fan and the air conditioning device.

Description

Technical field [0001] The invention relates to the technical field of air conditioners, in particular to a centrifugal fan blade, a centrifugal fan and air conditioning equipment. Background technique [0002] Currently, centrifugal fan blades are usually installed in air-conditioning equipment. The centrifugal fan blades are used to pass the airflow through the heat exchanger, and then exchange heat between the airflow and the refrigerant in the heat exchanger, so as to achieve the purpose of cooling and heating. [0003] The working efficiency of the existing centrifugal blades is generally low, mainly because the blades of the centrifugal blades generate relatively large resistance when rotating, and a large part of the energy is used to overcome the pressure difference resistance. And due to the existence of differential pressure resistance, the airflow is easy to produce secondary flow and separation phenomenon at the entrance of the centrifugal fan blade (that is, the front ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/28F04D29/30F04D29/66
CPCF04D29/281F04D29/30F04D29/667
Inventor 曹雷张苏北刘洋刘中杰邹建煌
Owner GREE ELECTRIC APPLIANCES INC
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