Composite multi-source central air-conditioning machine set using geothermal energy

Abstract

The invention is applicable to fields of air conditioners and provides a combined multi-source earth-energy central air-conditioning unit. The central air-conditioning unit comprises a primary heat exchanger, a secondary heat exchanger and a heat recovery system which are connected with other parts of a central air conditioner through pipes, wherein the primary heat exchanger, the secondary heat exchanger and the heat recovery system are serially connected through pipes. With the technical proposal, the central air-conditioning unit can use earth source and air source as cold and heat sources and uses the primary heat exchanger and the secondary heat exchanger to achieve a double cooling effect in cooling seasons and uses only the secondary heat exchanger in warming seasons with higher heat exchange efficiency, thereby overcoming the problem of limitation in the use of cold and heat sources and low heat exchange efficiency of earth source heat and air source heat pumps in the prior art. The central air-conditioning unit is also provided with a heat-recovery heat exchanger, so as to enable a user to make hot water for daily use during use of the air conditioner and bring great convenience in use of hot water in daily life.

Description

technical field [0001] The invention belongs to the field of air-conditioning equipment, in particular to the field of a composite multi-source ground energy central air-conditioning unit, and more specifically relates to an air-conditioning unit utilizing geothermal energy, air energy or other natural energy sources. Background technique [0002] At present, water-cooled chillers and air-cooled chillers are usually used in refrigeration equipment. Among them, the ground source heat pump water-cooled cold water air-conditioning system that uses underground shallow geothermal resources as a cold and heat source has the advantages of significant energy saving, comfort and environmental protection, high energy efficiency ratio, and zero air pollution. It has been widely used in Beijing, Shenyang, Shanghai, Chongqing and other cities. The national and local governments have set up special funds to reward the application of ground source heat pump central air conditioning. Howev...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a composite multi-source ground energy central air-conditioning unit, which aims to solve the problems in the prior art that the cold and heat sources brought about by the single use of ground-source heat pump central air-conditioning are limited to the ground and the heat exchange efficiency is not high

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