HOT WATER SUPPLY DEVICE - MITSUBISHI ELECTRIC CORP

Title:

HOT WATER SUPPLY DEVICE

Document Type and Number:

Japanese Patent JP2008223589

Kind Code:

A

Abstract:

To provide a hot water supply device, in which circuit breakage caused by increase in water temperature in a pump for the hot water supply device in increase in water temperature and increase in the temperature of a motor winding is prevented, pump efficiency is improved, and the size of the pump is reduced.

The hot water supply device 100 comprises: a heat exchanger 3 exchanging heat between refrigerant and water; a tank 1 reserving water; the pump 2 circulating the water and mounting a brushless DC motor thereon; and a control circuit 9 controlling the pump 2, and disposed to the outside of the pump 2. The control circuit 9 performs a magnetic pole position detection sensorless control of the brushless DC motor, and makes it drive in an optimum conduction phase depending on the revolution speed.

More Like This:

JP2023072981	WATER SUPPLY DEVICE
JPS60133194	[Title of the device] Pumping mode control device

Inventors:

KAWAKUBO MAMORU
ASO HIROKI
YAMAZAKI TOGO
YAMADA TOMOO
YAMAMOTO MINEO
ISHII HIROYUKI

Application Number:

JP2007062873A

Publication Date:

September 25, 2008

Filing Date:

March 13, 2007

Export Citation:

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Assignee:

MITSUBISHI ELECTRIC CORP

International Classes:

F04D15/00; F04D13/06; F04D29/00; F24H1/00; F24H1/18; F24H4/02; H02P6/06; H02P6/08; H02P6/17; H02P6/18; H02P6/182; H02P6/28

Domestic Patent References:

JP2008193877A	2008-08-21
JPH07337067A	1995-12-22
JP2001276485A	2001-10-09
JP2006525460A	2006-11-09

Attorney, Agent or Firm:

Shoji Mizoi

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