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Centrifugal fan and air-conditioning apparatus

A blower and space technology, applied in the direction of machines/engines, mechanical equipment, engine functions, etc., can solve the problems of reduced adhesion, damage, and reduced reliability of the cladding surface, and achieve the effect of suppressing deformation

Active Publication Date: 2015-03-25
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, if a large deformation occurs during welding, there is a possibility of damage, poor adhesion of the welding surface, etc., resulting in poor bonding, which may cause a decrease in reliability, noise, etc.

Method used

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  • Centrifugal fan and air-conditioning apparatus
  • Centrifugal fan and air-conditioning apparatus
  • Centrifugal fan and air-conditioning apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0024] figure 1 It is a perspective view which shows the structure of the centrifugal blower which concerns on Embodiment 1 of this invention. in addition, figure 2 It is a figure which shows the schematic structure of the cross section of the impeller of the centrifugal blower concerning Embodiment 1 of this invention. Such as figure 1 as well as figure 2 As shown, the impeller 100 of the centrifugal fan in Embodiment 1 is provided with a plurality of ( figure 1 7 in the middle) blade 2.

[0025] The shroud 1 is in the shape of a bell mouth and has an air inlet 1a. In addition, the blade 2 of the present embodiment is a three-dimensional blade having a twisted shape between the shroud 1 and the main plate 3 . Therefore, reduction in noise, reduction in power consumption, and the like can be achieved. In addition, a boss 4 serving as a rotation shaft is attached to the center of the main plate 3 . A driving device (fan motor, etc.) is attached to the sleeve 4 to r...

Embodiment approach 2

[0036] Figure 7 It is a perspective view which shows the structure of the main blade of the centrifugal blower concerning Embodiment 2 of this invention. exist Figure 7 In , components having the same functions as those described in Embodiment 1 above are denoted with Image 6 etc. with the same reference numerals. For example, in the above-mentioned embodiment, ribs 10 are added for reinforcement so as to be able to withstand external pressure (especially pressure during welding). Here, since the weight of the blade 2 and thus the impeller 100 is increased by the rib 10, it is preferable that the weight of the rib 10 be as light as possible. Therefore, in the impeller 100 of the centrifugal blower of this embodiment, under the premise of ensuring the function as the rib 10, the height of the rib 10 is formed differently (partially formed lower), so as to realize the light weight of the impeller 100. change.

[0037] In addition, as described in Embodiment 1, if the rib...

Embodiment approach 3

[0040] Figure 8 It is a perspective view which shows the structure of the main blade of the centrifugal blower concerning Embodiment 3 of this invention. exist Figure 8 In , components having the same functions as those described in Embodiment 1 above are denoted with Image 6 etc. with the same reference numerals. In the second embodiment described above, weight reduction is achieved by forming the ribs 10 with different heights. In particular, it is formed so that the area of ​​the rib 10 formed on the back side of the side surface 5c on the main board side is as small as possible, so that sink marks generated during welding can be reduced.

[0041] In the impeller 100 of the centrifugal blower according to the present embodiment, the weight of the impeller 100 can be reduced by making the thickness of the rib 10 different (in particular, forming a part thinner) while ensuring the function as the rib 10. . At this time, for example Figure 8 As shown, by forming the ...

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PUM

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Abstract

The invention provides a centrifugal fan and an air-conditioning apparatus. The centrifugal fan includes a main plate fixed to a rotating shaft of a drive unit, a shroud having an air suction port, and a plurality of blades disposed between the main plate and the shroud. A rib for reinforcement is formed in each of the blades. Deformation due to an external pressure can be suppressed, the main plate, the shroud, and the blades are firmly fixed to each other, and a decrease in reliability, generation of noise, and the like due to deformation are suppressed.

Description

technical field [0001] The present invention relates to a centrifugal blower and the like which suck gas from the direction of the rotation axis and discharge gas in a direction intersecting the rotation axis. Background technique [0002] For example, for an impeller used in a centrifugal blower, until now, it has been the mainstream to use a non-twisted two-dimensional blade between the main plate and the shroud. Therefore, generally, the main board and the blade can be integrally molded by using, for example, resin. However, in order to achieve further noise reduction, low power consumption, etc., for example, a centrifugal blower in which the blades arranged between the main board and the shroud are three-dimensional blades is required. [0003] When the centrifugal blower (impeller) is made of three-dimensional blades, in order to increase the degree of freedom of resin molding, for example, the impeller (especially the blade) is divided into multiple parts and molded,...

Claims

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Application Information

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IPC IPC(8): F04D29/28F04D29/30
CPCF04D29/281F04D29/30F04D29/282F04D29/666F05D2260/96F01D5/225F01D25/06F04D17/10
Inventor 栗原诚恒友功平高木昌彦
Owner MITSUBISHI ELECTRIC CORP
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