Water source heat pump unit system for low temperature water source

Abstract

The invention relates to an air conditioning unit device, in particular to a water source heat pump unit system for a low temperature water source. The system comprises a compressor, an oil separator, a condenser, a oil return injecting device and an evaporator; the evaporator is in a falling film type structure, a liquid distributor is arranged in the upper portion of the evaporator, the top of the evaporator is provided with a liquid incoming pipe, the port of the liquid incoming pipe contacts with the surface of the liquid distributor, the top of the evaporator is provided with an exhaust pipe, the bottom of the evaporator is provided with a discharge pipe, and heat exchange pipe beams are arranged below the liquid distributor. According to the system, water is distributed to the surface of the heat exchange pipes evenly through the liquid distributor, the heat exchange effect is fine, the refrigerant can be evaporated fully, the refrigerant storage amount is reduced, and the heat exchange pipes are prevented from freezing; meanwhile, since the level of the evaporator is low, the mixing ratio of lubrication oil is decreased, the lubrication oil can be injected to the compressor through the oil return injecting device, and the fine oil returning effect is achieved.

Description

technical field [0001] The invention relates to an air conditioner unit device, in particular to a water source heat pump unit system suitable for low-temperature water sources. Background technique [0002] Water source heat pump is currently recognized as an efficient and energy-saving air-conditioning equipment, and it needs a suitable water source for its operation. Groundwater is a high-quality water source for water-source heat pumps, but it needs to be extracted by digging wells, and there are problems such as difficulty in recharging well water and easily causing groundwater pollution. Although rivers, rivers, lakes, and seawater contain huge low-temperature heat energy, since the water temperature in winter is about -2°C-0°C, when current types of evaporators are used to extract heat from the low water temperature, the evaporator is prone to Frozen, resulting in heat exchange can not be carried out normally. [0003] In addition, the basic method of the exis...

AI Technical Summary

Problems solved by technology

However, due to the large amount of refrigerant charged in the flooded evaporator, it is difficult to discharge the refrigerant oil entering the evaporator after it is mixed with the refrigerant, especially after Freon refrigerants are mixed with the refrigerant oil, the refrigerant oil cannot be effectively sucked back to the compressor. Another disadvantage of the flooded heat exchanger is that most of the heat exchange tubes are immersed in the refrigerant, and the medium in the heat exchange tubes is easily frozen and cracked.

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