Electric pump

Abstract

To provide an electric pump that does not easily suffer malfunction of its driver due to vibration and whose components can be reduced in number, an electric pump includes a pump unit, a motor unit for driving the pump unit, and a driver chamber having a driver for controlling the pump unit. At least a space inside the driver chamber on one side of a substrate of the driver is filled with an amount of potting material for anchoring the substrate, whereas a space inside the driver chamber on the other side of the substrate is left as an unfilled space free from filling with potting material along the face direction of the substrate.

Description

TECHNICAL FIELD[0001]The present invention relates to an electric pump including a pump unit, a motor unit for driving the pump unit and a driver chamber having a driver for controlling the pump unit.BACKGROUND ART[0002]An example of the electric pump described above is known from Patent Document 1 for instance. With this electric pump, in order to promote heat discharge from the driver, a sheet-like heat discharging material is interposed between the driver and a cover of the driver chamber. With provision of this heat discharging material, heat of the driver is positively conducted via the heat discharging material to the cover to be air-cooled via this cover. As a result, heat discharge of the driver can be effected in an efficient manner.PRIOR ART DOCUMENTPatent Document[0003]Patent Document: Japanese Unexamined Patent Application Publication No. 2005-337095DISCLOSURE OF THE INVENTIONObject to be Achieved by Invention[0004]The driver substrate of this electric pump is fixed with...

AI Technical Summary

Benefits of technology

[0004]The driver substrate of this electric pump is fixed with a screw member to leading ends of a plurality of attaching projections formed of resin integrally with a motor housing. For this reason, vibration occurring in the motor unit and / or the pump unit can be easily transmitted to the substrate, which can result in turn to damage in a connector terminal or a terminal which electrically connects the motor unit with the driver or give adverse effect to various electronic elements mounted on the substrate. Further, if a gap is developed between the heat discharging material and the cover in the electric pump of Patent Document 1, this inhibits smooth conduction of heat from the driver to the cover, so that there is a risk of significant deterioration in the heat discharging performance. Accordingly, in order to provide secure contact between the cover and the heat discharging material, the cover is screw-fixed to the motor housing and also a sealing member is provided for ensuring sealing performance at this fixing portion. Therefore, the above arrangement would invite increase in the number of components.

Problems solved by technology

For this reason, vibration occurring in the motor unit and / or the pump unit can be easily transmitted to the substrate, which can result in turn to damage in a connector terminal or a terminal which electrically connects the motor unit with the driver or give adverse effect to various electronic elements mounted on the substrate.

Further, if a gap is developed between the heat discharging material and the cover in the electric pump of Patent Document 1, this inhibits smooth conduction of heat from the driver to the cover, so that there is a risk of significant deterioration in the heat discharging performance.

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