An improved heat source tower heat pump device

Abstract

The invention relates to an improved heat source tower heat pump device, which is composed of a compressor discharge port and a suction port, a condenser, an economizer, a bypass solenoid valve, an electronic expansion valve and an evaporator connected by pipelines to form a refrigerant circulation loop; The economizer is also connected to the economizer port of the compressor through a one-way valve; the bypass solenoid valve is also connected to the liquid injection port and the suction port of the compressor through a liquid injection solenoid valve and a second thermal solenoid valve respectively. mouth; the auxiliary circuit of the economizer is provided with a first thermal expansion valve and a solenoid valve; the waterway inlet and waterway outlet of the evaporator and the condenser are respectively connected with the heat source tower; the exchangers in the evaporator and the condenser The heat pipes are distributed in a branch shape, and the number of heat exchange tubes increases step by step from the inlet to the outlet. The invention can enhance the heat exchange effect, reduce the resistance of the refrigerant pipeline, and realize the efficient operation of the system by adopting the method of spraying liquid in the middle of the refrigerant and throttling liquid spraying at the suction port for extreme working conditions of the heat source tower.

Description

technical field [0001] The invention relates to an air-conditioning system, in particular to a heat source tower heat pump device capable of improving system operation efficiency, specifically an improved heat source tower heat pump device. Background technique [0002] Existing chillers have no heating function, and because the pressure ratios that different compressors can withstand are inconsistent, generally existing chillers cannot achieve the pressure ratio corresponding to the refrigerant under heating conditions, so they cannot be directly converted into heat pump units run. Similarly, the existing mature water / ground source heat pump has a large gap between the heating condition and the heat source tower heat pump condition because the minimum evaporation temperature of the heating condition is much lower than that of the heat source tower heat pump. Working conditions, especially when the ambient temperature is low, the heating capacity is very poor, and there are...

AI Technical Summary

Problems solved by technology

[0002] Existing chillers have no heating function, and because the pressure ratios that different compressors can withstand are inconsistent, generally existing chillers cannot achieve the pressure ratio corresponding to the refrigerant under heating conditions, so they cannot be directly converted into heat pump units run

Similarly, the existing mature water / ground source heat pump has a large gap between the heating condition and the heat source tower heat pump condition because the minimum evaporation temperature of the heating condition is much lower than that of the heat source tower heat pump. Working conditions, especially when the ambient temperature is low, the heating capacity is very poor, and there are problems such as oil return and insufficient air suction when the compressor is running

At present, both the condenser and the evaporator have a certain space for enhanced heat exchange. At the same time, during the winter operation, the evaporator operates ethylene glycol solution, which seriously deteriorates the heat exchange effect.

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