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drain pump

A technology of drainage pump and pump casing, applied in the direction of pump, pump element, pump device, etc., can solve the problems of motor durability and other problems, and achieve the effect of preventing water from immersing in the motor

Active Publication Date: 2021-08-31
FUJIKOKI MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to this backflow, the discharge water is blown out from the gap between the rotating shaft of the rotating blade and the through hole formed in the ceiling of the pump chamber for inserting the rotating shaft to the side of the motor for driving the rotating blade and adheres to the motor, which may cause damage to the motor. The durability of the motor, etc. will affect the

Method used

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Examples

Experimental program
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Embodiment Construction

[0039] Hereinafter, the drain pump in the embodiment will be described with reference to the drawings. In addition, in the following description of the embodiment, the parts and components having the same functions are attached with the same reference numerals, and repeated explanations about the parts and components with the same reference symbols are omitted.

[0040] (about backwater)

[0041] refer to figure 1 Let's explain the return water. figure 1 It is a schematic diagram for explaining backwater.

[0042] exist figure 1 In the described example, the drain pump 1 is connected to the drain pipe 101 . The drain pump 1 sucks in water from a suction port 68 and discharges water from a discharge port 69 . When the drain pump operates, water is discharged from the discharge port 69, so that the drain pipe 101 is filled with water. It is assumed that the drain pump is stopped in this state. In this case, the water in the drain pipe 101 flows backward toward the drain p...

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Abstract

The present invention provides a drain pump capable of preventing water from entering a motor even when it is downsized. Therefore, the drainage pump of the present invention includes: a motor having a rotor and a stator; a motor lower cover covering at least a part of the lower part of the motor; a rotor connection; and a pump housing having a pump chamber housing the rotating vane member. A through hole is provided on the upper wall of the pump housing. In addition, the motor lower cover includes a watertight wall portion arranged between the electric motor and the upper wall of the pump housing.

Description

technical field [0001] The present invention relates to a drainage pump, in particular to a technique for preventing water from entering a motor. Background technique [0002] For example, in a drain pump installed in an air conditioner indoor unit to discharge drain water generated in an evaporator during cooling or dehumidification to the outside, when the drain pump stops driving to drain water, the drain water accumulated in the drain water Drainage water from the outlet standpipe or the like flows back toward the pump chamber of the drain pump (that is, the space in which the rotary vane for draining is accommodated). Due to this backflow, the discharge water is blown out from the gap between the rotating shaft of the rotating blade and the through hole formed in the ceiling of the pump chamber for inserting the rotating shaft to the side of the motor for driving the rotating blade and adheres to the motor, which may cause damage to the motor. This influences the durab...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/08F04D1/14F04D29/00
CPCF04D1/14F04D13/0606F04D29/086F04D29/242F05D2210/11
Inventor 佐藤克司加藤友也佐藤永
Owner FUJIKOKI MFG CO LTD