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Motor for drainage pump, method for manufacturing same, and drainage pump having same

A drainage pump and motor technology, applied in the field of drainage pumps, can solve the problems of resin deformation positioning accuracy, low dimensional accuracy, shaft deviation, etc., and achieve the effect of suppressing resin deformation and shaft deviation

Active Publication Date: 2021-12-07
FUJIKOKI MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In general, the dimensional accuracy of resin parts is often lower than that of metal parts
In particular, the embedded structure (press-fit structure) that applies pressure will cause resin deformation and reduce positioning accuracy
Therefore, there is a possibility of axial misalignment in the structure where the bearing is mounted on the resin molded product

Method used

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  • Motor for drainage pump, method for manufacturing same, and drainage pump having same
  • Motor for drainage pump, method for manufacturing same, and drainage pump having same
  • Motor for drainage pump, method for manufacturing same, and drainage pump having same

Examples

Experimental program
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Embodiment Construction

[0025] Below, refer to Figure 1 ~ Figure 4 The structure of a drain pump according to an embodiment of the present invention will be described. As an example, the drain pump of this embodiment is used to discharge condensed water accumulated in a drain pan of an indoor unit of an air conditioner to the outside. Of course, the use of this drain pump is not limited to the discharge of condensed water, and it can also be used for the discharge of various liquids, drawing water, and the like.

[0026] figure 1 (a) is the front view of the drainage pump of an embodiment of the present invention, figure 1 (b) is a plan view. figure 2 is along figure 1 Sectional view of line A-A. image 3 express figure 1 The drain pump has an electric motor, image 3 (a) is a top view, image 3 (b) is along image 3 (a) Cross-sectional view of line B-B. Figure 4 It is along the state in which the motor is disassembled image 3 Sectional view (longitudinal section) of the axis of rotati...

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Abstract

Provided are a motor for a drain pump capable of effectively suppressing axial misalignment in a structure in which a bearing is attached to a resin molded product, a manufacturing method thereof, and a drain pump including the motor. In the motor (100) of the drain pump (1), a metal stator core (126) is embedded in a resin stator mold (121) of a stator (120). The stator molding (121) is fitted inside an outer peripheral wall portion (152) of a metal motor cover (150). In addition, the stator core (126) is exposed on the outer peripheral surface of the stator molding (121) and is in contact with the outer peripheral wall portion (152) of the motor cover (150).

Description

technical field [0001] The present invention relates to a motor for a drain pump, a manufacturing method thereof, and a drain pump having the same. Background technique [0002] An air conditioner installed on an indoor ceiling has a drain pan for receiving condensed water condensed on the surface of the indoor heat exchanger, and a drain pump (condensed water pump) for discharging the condensed water in the drain pan. [0003] Patent Document 1 discloses an example of a conventional drain pump. This drain pump has a motor unit and a pump unit. The motor part has a stator circuit part configured by embedding a stator unit in a resin mold part. The stator circuit part has a through hole. A pair of upper and lower bearing assemblies are arranged in the through hole. A rotor is arranged between these bearing assemblies, and a drive shaft of the rotor is pivotally supported by these bearing assemblies. The impeller (rotating vane) of the pump section is attached to the driv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/00F04D1/14H02K5/08H02K15/12
CPCF04D1/14F04D29/00H02K5/08H02K15/12
Inventor 佐藤克司佐藤永
Owner FUJIKOKI MFG CO LTD