Jiangsu Sujing Group Co., Ltd

Xiaofei Song

Hao Pan

Dan Xiong

Xiaoliang Tang

Qiang Kang

Jun You

Bin Chen

Hao Qiu

Disclosed is a carbon dioxide heat pump evaporator, comprising side evaporators having defrosting water flow channels formed thereon, an evaporator tray which is arranged at the bottoms of the side evaporators and is used for supporting the side evaporators, and a defrosting drainage system, wherein the defrosting drainage system comprises a plurality of defrosting electric heating tubes inserted into the side evaporators, water receiving gutters which are connected to the defrosting water flow channels, gutter electric heating mechanisms for heating the water receiving gutters, and drainage pipes which are connected to the water receiving gutters and are provided with conduit electric heating tracing bands; and the evaporator tray, the water receiving gutters and the drainage pipes are sequentially arranged from top to bottom. The carbon dioxide heat pump evaporator is suitable for low-temperature areas, especially for areas of extreme cold, and has the characteristics of a short defrosting time, smooth drainage, etc.

Carbon dioxide heat pump evaporator

A multi-parallel carbon dioxide heat pump control method based on target load control, wherein the multi-parallel carbon dioxide heat pump comprises a carbon dioxide circulation loop, a heat source pipeline and a hot water pipeline, and the control method comprises: adjusting the opening degree of an electronic expansion valve () according to the temperature of an inlet of the hot water pipeline, the temperature of an outlet of the hot water pipeline, the flow in the hot water pipeline and a target outlet temperature set by a user, such that the steady-state change of system pressure can be realized by adjusting the electronic expansion valve () on the basis of the fluctuation of parameters such as user side temperature and flow, thus a target outlet temperature change curve is rapidly and stably converged to a target value, and the outlet temperature can be rapidly stabilized.

Multi-parallel carbon dioxide heat pump control method based on target load control

A carbon dioxide overlapping type heating system and a control method therefor, in which the heating system includes a low-temperature-stage loop, high-temperature-stage loop and a heating loop, in which a temperature-stage compressor () and a high-temperature-stage compressor () are both variable-frequency compressors; and a water pump () is a variable-frequency water pump.

Carbon dioxide overlapping type heating system, and control method therefor

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Jiangsu, China

Xiaofei Song