Title:
HEAT PUMP SYSTEM
Document Type and Number:
Japanese Patent JP2017036882
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a heat pump system capable of securely preventing freezing and breakage of a water heat exchanger during a reverse cycle type defrosting operation and of preventing heat loss from being generated on a water circuit side.SOLUTION: A heat pump system includes: a refrigerant circuit 42 in a first system that is constituted by connecting a first utilization unit 3 having a utilization side heat exchanger 28 and a second utilization unit 4 having a water heat exchanger 35 for generating hot water to a heat source unit 2 having a heat source side heat exchanger 7 in parallel; and defrosting control means 45 for switching the refrigerant circuit 42 from a heating cycle to a cooling cycle by using a four-way selector valve 6 for defrosting when frost forms on the heat source side heat exchanger 7. The defrosting control means 45 includes means 33, 34 for blocking a flow of a refrigerant to the water heat exchanger 35 of the second utilization unit 4 and making the refrigerant flow only on the utilization side heat exchanger 28 side of the first utilization unit 3 during a defrosting operation.SELECTED DRAWING: Figure 1
Inventors:
YAMADA HIROYUKI
MURAKAMI KENICHI
INABA TAKASHI
FUJINO TETSUJI
MURAKAMI KENICHI
INABA TAKASHI
FUJINO TETSUJI
Application Number:
JP2015158201A
Publication Date:
February 16, 2017
Filing Date:
August 10, 2015
Export Citation:
Assignee:
MITSUBISHI HEAVY IND LTD
International Classes:
F25B47/02; F24F11/02; F25B1/00; F25B6/02; F25B29/00
Domestic Patent References:
| JP2004218944A | 2004-08-05 | |||
| JP2006046692A | 2006-02-16 | |||
| JP2010196950A | 2010-09-09 |
Foreign References:
| WO2014188575A1 | 2014-11-27 |
Attorney, Agent or Firm:
Noriharu Fujita
Kunio Ueda
Kunio Ueda