Heat pump system and control method thereof

Abstract

The present invention discloses a heat pump system. The heat pump system comprises a refrigerating fluid loop and at least one second heat source loop. The second heat source loop is used for heat exchange with the refrigerating fluid loop. The refrigerating fluid loop comprises a first heat source heat exchanger, a second heat source heat exchanger and a user side heat exchanger, wherein the first heat source heat exchanger is an air source heat exchanger and is connected in a parallel manner with the second heat source heat exchanger, and the first heat source heat exchanger and the second heat source heat exchanger are individually connected in a series manner with the user side heat exchanger. According to the heat pump system provided by the invention, temperature adjusting requirements of users can be met by selecting a plurality of sets of heat sources or by switching among the heat sources according to different environments and requirements of the users. Especially in winter in the north part of China, a compound heat source can be formed for heat supply by combining an air heat source and other heat sources, various types of low temperature heat sources can be supplemented into heat supply loads of the air heat source, and thus the heat supply performance and the operation stability of a heat pump unit can be promoted. A heat pump control method is also provided.

Description

technical field [0001] The invention relates to the technical field of heating equipment, in particular to a heat pump system and a control method thereof. Background technique [0002] Air source heat pump is a device that uses air as a low-temperature heat source and is driven by a small amount of high-level electric energy to upgrade the low-level heat energy in the air into high-level heat energy for utilization. Dependence on fossil fuels has the greatest development potential for heating equipment. Air source heat pumps operate well when the ambient temperature is relatively high, but the heat pump system cannot operate efficiently, reliably and stably when the outdoor environment is low. In northern China, the temperature drops sharply in winter, and the temperature difference between day and night is large, which affects the heating capacity output of air source heat pumps, and also restricts the application and promotion of air source heat pumps in the north. [0...

AI Technical Summary

Problems solved by technology

The air source heat pump operates well when the ambient temperature is relatively high, but the heat pump system cannot operate efficiently, reliably and stably when the outdoor environment is low

In northern China, the temperature drops sharply in winter, and the temperature difference between day and night is large, which affects the heating capacity output of air source heat pumps and restricts the application and promotion of air source heat pumps in the north.

[0003] In addition, if water or soil is used alone as a heat source, the temperature of the heat source will also be affected by the climate, thus affecting the heating efficiency of the heat pump

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