The realization of the screw type ground source heat pump unit is divided into two forms: one is the use of water system switching mode, the use of water heat pump unit; the other is the air cooling mode, through the four-way valve switching cooling heat. The water heat pump cannot be switched on the fluorine side, and the cooling and heating must be realized through a complex water pipeline system. The air-cooled heat pump can only achieve cooling and heating alone, and can only meet certain functional requirements when performing the heat recovery function.

Technical points: In order to overcome the shortcomings of existing technologies,Technical StaffProvided is a compensated screw ground source heat pump unit.,With the screw compressor as the power, the use of water and ground sources can simultaneously realize the functions of cooling, heating, cooling, and heating, thereby reducing the switching on the user side, ensuring the stability and reliability of the user-side water system, and having a high overall efficiency. According to the technical solution to achieve the above object, a compensated screw type ground source heat pump unit includes a screw compressor, an oil separator, a three-way regulating valve, a first dual-purpose heat exchanger, a four-way reversing valve, a gas-liquid separator, a gas-liquid heat exchanger, an accumulator, an economizer and a second dual-purpose heat exchanger, The gas-liquid separator, the screw compressor, the outlet of the oil separator, the first port of the four-way reversing valve and the second port of the four-way valve are connected in turn. The third port of the four-way reversing valve, the inlet of the three-way regulating valve, the first outlet of the three-way regulating valve and the inlet of the first dual-purpose heat exchanger are connected in sequence; the second outlet of the three-way regulating valve is connected with the inlet of the air source heat exchanger; the outlet of the air source heat exchanger is connected with the inlet of the accumulator through the first pipeline; the outlet of the economizer is connected to the second interface of the second dual-purpose heat exchanger through a second pipeline; the outlet of the economizer is connected to the first pipeline through a third pipeline; the third interface of the second dual-purpose heat exchanger is connected to the first pipeline through a fourth pipeline; the outlet of the first dual-purpose heat exchanger is connected to the first pipeline through a fifth pipeline; and the economizer is connected to the screw compressor. In the compensated water-ground-source screw machine heat pump unit of the present invention, the screw compressor adopts a twin-screw compressor or a single-screw compressor. In the compensation water-ground source screw machine heat pump unit of the invention, the air source heat exchanger is a finned tube heat exchanger.In this screw ground source heat pump unitThe first dual-purpose heat exchanger and the second dual-purpose heat exchanger respectively adopt a submerged heat exchanger or a falling film heat exchanger.The screw ground source heat pump unitCheck valves are provided on the first pipe, the second pipe, the third pipe, the fourth pipe and the fifth pipe, respectively.The screw type ground source heat pump unitThe oil return port of the oil separator is connected with the screw compressor.

In summary, the above-mentioned screw ground source heat pump unitThe use of water and ground sources can simultaneously realize the functions of cooling, heating, cooling and heating, reducing the switching of the user end, ensuring the stability and reliability of the user end water system, and having a high overall efficiency. It is a kind of multifunctional equipment, the screw compressor can meet the requirements of high temperature heating, has higher pressure ratio and higher efficiency, is a kind of environmental protection new energy equipment.