Title:
AIR CONDITIONING AND HOT WATER SUPPLY COMBINED SYSTEM
Document Type and Number:
WIPO Patent Application WO/2016/147305
Kind Code:
A1
Abstract:
Provided is an air conditioning and hot water supply combined system (A) in which system COP is improved by suppressing the frequency of the occurrence of high-pressure suppression control by a bypass of a heat source unit (100), in a case where, in a heating operation, a heating load and a hot water supply load are small. The air conditioning and hot water supply combined system (A) is provided with the following: an air conditioning-side refrigerant circuit (20) in which formed is a refrigeration cycle where a load-side unit (200) equipped with a load-side heat exchanger (212) and a load-side restriction device (211) is connected, by refrigerant piping, to a heat source unit (100) equipped with a heat source-side compressor (111) for compressing air conditioning-use refrigerant and heat source-side heat exchangers (113a, 113b); a hot water supply-side refrigerant circuit (30) in which formed is a refrigeration cycle where a hot water supply unit compressor (321) for compressing hot water supply-use refrigerant, a water heat exchanger (322) for exchanging heat between hot water supply-use water and hot water supply-use refrigerant, a hot water supply-side refrigerant circuit restriction device (323), and a refrigerant-to-refrigerant heat exchanger (312) for exchanging heat between the air conditioning-use refrigerant and the hot water supply-use refrigerant are connected by refrigerant piping; and a hot water supply unit (300) equipped with the refrigerant-to-refrigerant heat exchanger (312) and an air conditioning-side refrigerant circuit restriction device (311) which are connected in parallel to the load-side unit (200) in the air conditioning-side refrigerant circuit (20). In a state where the heat operation cycle is operating, the hot water supply unit (300) causes the driving frequency of the hot water supply unit compressor (321) to increase if the pressure on the high-pressure side of the air conditioning-side refrigerant circuit (20) has exceeded a high-pressure threshold, or if the condensation temperature in the air conditioning-side refrigerant circuit (20) has exceeded a condensation temperature threshold.
Inventors:
KAWAGOE TOMOKAZU (JP)
MORIMOTO OSAMU (JP)
MORIMOTO OSAMU (JP)
Application Number:
PCT/JP2015/057756
Publication Date:
September 22, 2016
Filing Date:
March 16, 2015
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
F25B1/00; F24H1/00; F25B7/00
Domestic Patent References:
| WO2011080801A1 | 2011-07-07 | |||
| WO2010098073A1 | 2010-09-02 | |||
| WO2011089652A1 | 2011-07-28 |
Foreign References:
| JP2004132647A | 2004-04-30 | |||
| JP2003194434A | 2003-07-09 |
Attorney, Agent or Firm:
KISA PATENT & TRADEMARK FIRM (JP)
Patent business corporation きさ patent trademark office (JP)
Patent business corporation きさ patent trademark office (JP)
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