Title:
HEAT PUMP TYPE WATER HEATER
Document Type and Number:
Japanese Patent JP2017133727
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a heat pump type water heater capable of cooling a control device effectively by using a refrigerant in a refrigerant flow passage even during a defrosting operation.SOLUTION: A compressor 11, a condensation heat exchanger 12, an expansion valve 13, and an evaporation heat exchanger 14 are communicated sequentially by refrigerant piping 15. A heat pump type water heater includes: a bypass passage 18 for guiding a high-temperature refrigerant discharged from the compressor 11 directly to an inlet of the evaporation heat exchanger 14 by detouring the condensation heat exchanger 12 and the expansion valve 13; and a solenoid valve 19 for defrosting for switching opening/closing of the bypass passage 18. As a control device 3, a heat sink constituted by a plurality of heat radiation fins is provided at a control board in which a power module is installed in a closely contacted manner. With respect to the refrigerant piping leading from the evaporation heat exchanger to the compressor, the heat sink is installed in a state of being in contact, so as to be able to exchange heat with the refrigerant in the refrigerant piping.SELECTED DRAWING: Figure 1
Inventors:
OTANI SHUHEI
UCHIKURA SEIJI
UCHIKURA SEIJI
Application Number:
JP2016012418A
Publication Date:
August 03, 2017
Filing Date:
January 26, 2016
Export Citation:
Assignee:
NORITZ CORP
International Classes:
F25B1/00; F24H1/00; F25B13/00
Attorney, Agent or Firm:
Patent business corporation Prois ip partners