Water source heat pump evaporator suitable for low-temperature water source

Abstract

The invention is a kind of water-source heat pump evaporator which is especially suitable for low-temperature water source, it has a transverse pot shell, inlet of secondary refrigerant is set at one end of the shell and outlet of secondary refrigerant is set at the other end of the shell, transverse heat exchange tube is laid out in the shell and both ends of the heat exchange tube connects with pipe sheet of both ends of the shell correspondingly. Refrigeration with jet and liquid-spraying tube mixed with refrigeration oil are set above the transverse heat exchange tube, refrigerant, refrigerant vapour, discharge tube of refrigeration oil are set below pot shell. The invention has a structure of single flow shell and tube evaporator, it is characterized in that secondary refrigerant enters from one end and is discharged from the other end directly through heat exchange tube, refrigerant and refrigeration oil intermixture exchange for heat through heat exchange tube by spraying, flow of secondary refrigerant through evaporator is large and the flow speed is fast, time for exchanging is short, thus, it avoids that evaporator freezes because of low-temperature water source effectively. Moreover, because dosage of refrigerant is little, refrigerant can mix with refrigeration oil sufficiently and it is effectual to return oil.

Description

technical field [0001] The invention relates to an air conditioner evaporator, in particular to a water source heat pump evaporator 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 the groundwater needs to be extracted by digging a well, and there are many problems such as difficulty in recharging the well water and easily causing groundwater pollution. Rivers, rivers, lakes, and sea water contain huge low-temperature heat energy, but since the water temperature is around -2°C-0°C in winter, when current types of evaporators are used to extract heat from the low water temperature, the evaporators are prone to freezing , causing heat transfer to fail. In addition, due to the large amount of refrigerant charged in...

AI Technical Summary

Problems solved by technology

Groundwater is a high-quality water source for water-source heat pumps, but groundwater needs to be extracted by digging wells. There are many problems such as difficulty in recharging well water and easy groundwater pollution.

Rivers, rivers, lakes, and seawater contain huge low-temperature heat energy, but since the water temperature in winter is around -2°C-0°C, when current types of evaporators are used to extract heat from the low water temperature, the evaporators are prone to freezing , causing heat transfer to fail

In addition, due to the large amount of refrigerant charged in the flooded evaporator of the prior art, it is difficult to discharge the refrigerating oil entering the evaporator after it is mixed with the refrigerant. Efficient suction back to the compressor

In addition, the current deluge and circulation evaporators rely on liquid pumps to force the refrigerant to circulate in the evaporator, which requires high equipment costs and complicated connections.

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