HEAT PUMP WATER HEATER

专利名称：HEAT PUMP WATER HEATER发明人：尾花 利彦申请号：JP2015034665申请日：20150225公开号：JP90984B2公开日：20190327

摘要：PROBLEM TO BE SOLVED: To obtain information on water circulation when atemperature of water circulating in a circulation circuit 4 becomes abnormal so as toanalyse the cause of the abnormality of the circulation circuit 4.SOLUTION: Whendetecting an abnormality of a temperature of circulating water, a control device 6 stopsan operation of a heat pump unit 1 and analyses the cause of the abnormality on thebasis of a change in the water temperature. After stop of the operation of the heat pumpunit 1, if the temperature of the circulating water is not lowered, the control device 6determines that a circulation circuit 4 has an abnormality. The control device 6determines freezing of the water on the basis of an outside air temperature or a

temperature of water flowing from a tank 2 to the heat pump unit 1. The control device 6determines that the abnormality is caused by impurities accumulated in the circulationcircuit 4 when a cumulative operation time obtained by integrating operation times of acirculation pump 5 is long, and determines that the abnormality is caused by air stagnantin the circulation circuit 4 when the cumulative operation time is short.SELECTEDDRAWING: Figure 1

申请人：シャープ株式会社

地址：大阪府堺市堺区匠町１番地

国籍：JP

代理人：大島 泰甫,稗苗 秀三,小羽根 孝康,藤原 清隆

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