HIGH-EFFICIENCY ENERGY-SAVING AIR-ENERGY DUAL-MACHINE HEAT PUMP AIR CONDITIONING SYSTEM

WIPO Patent Application WO/2018/137125

A1

A high-efficiency energy-saving air-energy dual-machine heat pump air conditioning system. An outlet of a first compressor (11), via ports d1 and b1 of a first two-position four-way valve (21) and a first check valve (31), and an outlet of a second compressor (12), via a second check valve (32), merge together and connect to a port c2 of a second two-position four-way valve (22). A port d2 of the second two-position four-way valve (22) connects to inlets of a first indoor condenser (51) and a second indoor condenser (52) separately. Outlets of the first and second indoor (51, 52) condensers pass through first, second and third expansion valves (61, 62, 63), and connect to an inlet of an evaporator (71). An outlet of the evaporator (71) passes through ports a2 and b2 of the second two-position four-way valve (22) and diverges into two routes: one route passing through ports c1 and a1 of the first two-position four-way valve (21) and a second liquid tank (42) and connecting to an inlet of the second compressor (12); and the other route passing through a first liquid tank (41) and connecting to an inlet of the first compressor (42). The invention is highly efficient, energy-saving, can be operated freely and is suitable for heating during winter in a cold region.

XU SHENGHENG (CN)

PCT/CN2017/072402

August 02, 2018

January 24, 2017

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XU SHENGHENG (CN)

F25B30/00; F25B6/00; F25B31/00

CN104848599A	2015-08-19
CN104764087A	2015-07-08
CN202002391U	2011-10-05
CN203413824U	2014-01-29
US6955059B2	2005-10-18
JP2009228978A	2009-10-08

BEIJING SHUANGSHOU INTELLECTUAL PROPERTY AGENT LTD. (CN)

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