Multi-cycle variable-flow heat pump system

Abstract

The invention discloses a multi-cycle variable-flow heat pump system. The multi-cycle variable-flow heat pump system is simple in structure and low in cost and comprises a refrigeration compressor unit, a three-way valve, a heat exchanger, an indoor unit, an outdoor unit, a first throttling valve, a second throttling valve, a first four-way reversing valve and a second four-way reversing valve. Afirst exhaust port of the refrigeration compressor unit is connected with a fourth port of the first four-way reversing valve through a second valve. A first suction port of the refrigeration compressor unit is connected with a second port of the second four-way reversing valve. A second exhaust port of the refrigeration compressor unit is connected with a second port of the second four-way reversing valve. A second suction port of the refrigeration compressor unit is connected with a fourth port of the second four-way reversing valve. By adoption of the multi-cycle variable-flow heat pump system, eight-cycle comparative experiments can be conducted on one experiment table, operation is convenient, and the accuracy of experimental results is high.

Description

technical field [0001] The invention relates to the technical field of heat pumps, and more specifically relates to a heat pump system capable of realizing single-stage parallel connection of variable flow, double-stage compression and cascade cycle. Background technique [0002] With the increasing pressure of environmental protection, the country vigorously promotes coal-to-electricity products. Air source heat pumps are widely used due to their energy saving and environmental protection features. [0003] For heating in winter, a single-stage compression heat pump cycle is usually used. The single-stage compression heat pump cycle system is simple and low in cost. However, when the difference between the condensing temperature and the evaporating temperature is large, the pressure difference between the condensing pressure and the evaporating pressure is also large, and one-time throttling can no longer satisfy the working conditions with a large pressure difference. For...

AI Technical Summary

Problems solved by technology

At present, the corresponding refrigeration cycle method is generally adopted according to the main needs, which cannot be changed according to the change of working conditions, and the operating cost is high and the temperature fluctuates greatly.

Especially for the comparative experiments of the experimental system, they are designed separately, and the experimental results are affected by the system composition.

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