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drain pump

A drainage pump, water flow direction technology, applied in the direction of pumps, pump components, non-variable-capacity pumps, etc., can solve problems such as water flow disorder, and achieve the effects of reducing turbulent flow, suppressing mixed flow, and suppressing noise

Active Publication Date: 2020-01-14
FUJIKOKI MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, regarding the rotary blades of conventionally used drainage pumps, Figure 7 (a) and Figure 7 (c) As shown by the arrow, the water flow in the vicinity of the corner A of the rotating blade, which is the connecting portion of the upper edge portion 62 and the side edge portion 63, is stirred by the surface of the large-diameter blade 60 and the auxiliary blade 70 in the direction of rotation. The water surface (the water stirring surface 61 of the large-diameter blade 60 and the water stirring surface 71 of the auxiliary blade 70) makes the water divided into the water flow above the rotating blade (the water flow in the yz direction) and the water flow in the outer direction (the water flow in the xy direction). Therefore, there is a difference between the water-stirring surface of the rotating blade and the surface on the opposite side (that is, the downstream side across the rotating blade), especially the connecting portion between the upper edge portion 62 and the side edge portion 63 of the rotating blade, that is, near the corner. The water flow of the vector collides, so the water flow is turbulent, the surrounding air becomes bubbles and creates mixed flow, and sometimes small vibrations and noises are generated due to the bursting of the bubbles.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment

[0053] figure 1 It is a figure showing the first embodiment of the rotating blade (large-diameter blade) used in the drainage pump of the present invention, figure 1 (a) is an enlarged top view of the main part of the rotating blade, figure 1 (b) is viewed from the upstream side of the water flow figure 1 (a) A cross-sectional view of the state of the rotating blade shown, figure 1 (c) is figure 1 (a) Perspective view of the rotating blade shown.

[0054] In order to drain the condensed water in the condensed water pan not shown in the figure, figure 1 The rotary blade 50 of the drain pump shown is provided with a plurality of large-diameter blades 60 equiangularly, and a water stirring surface 61 for stirring condensed water is formed on the large-diameter blade 60 beyond the annular flat surface 55 . The water stirring surface 61 is one surface of the large-diameter blade 60 in the direction in which the large-diameter blade 60 rotates.

[0055] In addition, on ...

no. 2 Embodiment

[0060] figure 2 shows the rotating blade of Embodiment 2 of the present invention, figure 2 (a) is an enlarged top view of the main part of the rotating blade, figure 2 (b) means viewed from the upstream side of the water flow figure 2 (a) A cross-sectional view of the state of the rotating blade shown, figure 2 (c) is figure 2 (a) Perspective view of the rotating blade shown. In the first embodiment, the water flow direction restricting part 101 is provided on the outer peripheral side of the upper edge part 62 of the large diameter blade 60, but in this embodiment, the water flow direction restricting part 102 is provided on the upper side of the side edge part 63 of the large diameter blade 60. . Similar to the first embodiment, the water flow direction restricting part 102 is formed in a cylindrical shape, and the vector of the water flow is restricted by the cylindrical surface. By such a water flow direction restricting part 102, the water flow stirred by the...

no. 3 Embodiment

[0062] image 3 (a) is a perspective view showing a rotating blade of a third embodiment of the present invention, image 3 (b) is the image 3 (a) Top view. Its shape is to replace the water flow direction restricting portion of the first embodiment with a water flow direction restricting portion 103 composed of a columnar member whose bottom surface is eggplant-shaped (ie, streamlined) with a narrow portion and a wide portion. Accordingly, the water flow can be restricted more smoothly than the cylindrical shape of the first embodiment, and the effect of suppressing noise can be enhanced. Additionally, if image 3 (b) to image 3 As shown in (e), which of the wide portion and the narrow portion is arranged on the upstream side of the water flow direction restricting portion 103 , and what inclination is used may be appropriately selected.

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PUM

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Abstract

The present invention provides a drainage pump that achieves further improvement in quietness during operation. The rotary vane (50) used in the drain pump (1) has a large-diameter vane (60) extending radially from a shaft portion (52) connected to the output shaft of the motor, and has a plurality of plate-shaped agitator blades (60). water surface (61); a plurality of plate-shaped small-diameter blades (54), connected to the lower edge of the large-diameter blade (60); Between the blades (60). Conventionally, the water stirred by the water stirring surfaces (61, 71) of the large-diameter blade (60) and the auxiliary blade (70) becomes a water flow in the yz direction through the upper edge portion (62), and flows in the xy direction through the side edge portion (63). The water flow will collide and turbulently flow on the back of the stirring surface, which will cause noise. However, the water flow direction restriction part (101) can make it become the water flow in the xy direction, reducing the turbulent flow based on the collision of the water flow. prevent noise.

Description

technical field [0001] The present invention relates to a drain pump, in particular to a drain pump suitable for discharging condensed water in a condensed water pan that receives water condensed in an indoor heat exchanger of an air conditioner to the outside, and particularly provides a drain pump with high noise performance. Background technique [0002] Conventionally, a condensed water pan for receiving condensed water condensed on the surface of an indoor heat exchanger of the air conditioner is attached to an air conditioner in the form of a ceiling embedded in a room. A drain pump (drain pump) is used to discharge the condensed water in the condensed water pan to the outside. [0003] Hereinafter, the drain pump for the air conditioner which the applicant of this application has already applied for and disclosed is demonstrated as prior art. Figure 5 It is a front view showing a part of a conventional drainage pump cut away, Image 6 (a) is for Figure 5 A top view...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/66F04D29/44F04D29/24
CPCF04D29/242F04D29/445F04D29/669F04D29/245F04D29/688F04D29/24F04D29/007F04D29/667
Inventor 佐藤克司大木直也杉野真圣加藤友也
Owner FUJIKOKI MFG CO LTD