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Title:
HEAT PUMP TYPE HOT WATER SUPPLY DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/202709
Kind Code:
A1
Abstract:
Provided is a heat pump type hot water supply device including a heat source device, a detection device that detects a discharge temperature, an evaporator outlet temperature, and an evaporator inlet temperature, and a control device that controls the heat source device to heat the heating medium. The control device is configured to include a discharge pressure estimation unit that estimates the discharge pressure, and a compressor control unit that stops driving of the compressor when the discharge pressure exceeds the allowable pressure. The discharge pressure estimation unit calculates the compressor outlet theoretical enthalpy when it is assumed that the refrigerant is adiabatically compressed by the compressor. The discharge pressure estimation unit calculates the compressor outlet actual enthalpy by using the adiabatic efficiency of the compressor and the compressor outlet theoretical enthalpy, and calculates the discharge pressure by using the discharge temperature and the compressor outlet actual enthalpy.

Inventors:
FUJIMARU, Yuya (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
Application Number:
JP2018/016174
Publication Date:
October 24, 2019
Filing Date:
April 19, 2018
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORPORATION (7-3 Marunouchi 2-chome, Chiyoda-ku Tokyo, 10, 〒1008310, JP)
International Classes:
F24H4/02; F25B1/00; F25B30/02
Foreign References:
JP2012163233A2012-08-30
JP2006046681A2006-02-16
JP2008202809A2008-09-04
JP2012042114A2012-03-01
JP2008267694A2008-11-06
JP2010002090A2010-01-07
JPS6358063A1988-03-12
Attorney, Agent or Firm:
TAKADA, Mamoru et al. (Takada, Takahashi & Partners Konwa Bldg. 7F, 12-22 Tsukiji 1-chome, Chuo-k, Tokyo 45, 〒1040045, JP)
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