Title:
AIR CONDITIONING/HOT WATER SUPPLY SYSTEM AND CONTROL METHOD FOR AIR CONDITIONING/HOT WATER SUPPLY SYSTEM
Document Type and Number:
WIPO Patent Application WO/2012/114462
Kind Code:
A1
Abstract:
In order to provide an air conditioning/hot water supply system having multiple heat sources, having a cascade refrigeration cycle formed therein, and capable of suitably recovering a coolant from an unused heat exchanger and utilizing same in a heat exchanger being used, and in order to provide a control system for the air conditioning/hot water supply system, the air conditioning/hot water supply system executes at least one of either an air conditioning coolant recovery operation which cuts off the inflow of an air conditioning coolant to an intermediate heat exchanger (23) and an air conditioning heat source-side heat exchanger (24) and recovers the air conditioning coolant using an air conditioning compressor (21), or a hot water supply coolant recovery operation which cuts off the inflow of a hot water supply coolant to the intermediate heat exchanger (23) and a hot water supply heat source-side heat exchanger (44) and recovers the hot water supply coolant using a hot water supply compressor (41), when switching between a first operation in a first state wherein the intermediate heat exchanger (23) is unused and the air conditioning heat source-side heat exchanger (24) and the hot water supply heat source-side heat exchanger (44) are used, and a second operation in a second state wherein the air conditioning heat source-side heat exchanger (24) and the hot water supply heat source-side heat exchanger (44) are unused and the intermediate heat exchanger (23) is used.
Inventors:
KOKUGAN YOKO (JP)
KOTANI MASANAO (JP)
UCHIDA MARI (JP)
KOTANI MASANAO (JP)
UCHIDA MARI (JP)
Application Number:
PCT/JP2011/053864
Publication Date:
August 30, 2012
Filing Date:
February 22, 2011
Export Citation:
Assignee:
HITACHI LTD (JP)
KOKUGAN YOKO (JP)
KOTANI MASANAO (JP)
UCHIDA MARI (JP)
KOKUGAN YOKO (JP)
KOTANI MASANAO (JP)
UCHIDA MARI (JP)
International Classes:
F25B29/00; F25B7/00
Domestic Patent References:
| WO2010082324A1 | 2010-07-22 |
Foreign References:
| JP2005299935A | 2005-10-27 | |||
| JPH0432669A | 1992-02-04 | |||
| JPS61101771A | 1986-05-20 | |||
| JP2004218943A | 2004-08-05 |
Attorney, Agent or Firm:
ISONO Michizo (JP)
Michizo Isono (JP)
Michizo Isono (JP)
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Claims: