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Water source heat pump unit system for low temperature water source

A water source heat pump unit and water source technology, applied in heat pumps, refrigerators, refrigeration components, etc., can solve the problems of difficult discharge, freeze cracking, and large amount of refrigerant

Inactive Publication Date: 2015-06-03
SHANDONG YUGIA FUERDA AIR CONDITIONER EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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  • Water source heat pump unit system for low temperature water source
  • Water source heat pump unit system for low temperature water source
  • Water source heat pump unit system for low temperature water source

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] For the water source heat pump unit system applicable to low temperature water sources in this embodiment, refer to Figure 1-5 , including compressor 1, oil separator 2, condenser 3, oil return injection device 4, evaporator 5, and also includes dry filter, filter, hand valve, solenoid valve, regulating valve, expansion valve, sight glass and so on to connect the adjustment parts.

[0020] Among them, the evaporator 5 adopts a falling film structure, and a liquid distributor 6 is installed on the top of the evaporator. The liquid inlet pipe 7-1 is provided on the top of the evaporator, and its nozzle is in contact with the surface of the liquid distributor 6, and the liquid distributor 6 6 below is provided with heat exchange tube bundle 8. The mixture of refrigerant and lubricating oil enters the evaporator through the liquid inlet pipe 7-1, and is evenly distributed to the surface of the heat exchange tubes through the liquid distributor to fully evaporate the refri...

Embodiment 2

[0028] In order to achieve a better liquid distribution effect, the water source heat pump unit system of this embodiment is suitable for low-temperature water sources, so further improvements are made on the basis of the structure of Embodiment 1, that is, the heat exchange tubes in the heat exchange tube bundle 8 are in the shape of an equilateral triangle The arranged single-process shell-and-tube structure and the single-process circulation of refrigerant water avoid the risk of freezing and cracking of heat exchange tubes caused by multi-process heat exchange and lower water temperature.

Embodiment 3

[0030] The water source heat pump unit system suitable for low-temperature water sources in this implementation is based on Embodiments 1 and 2, and the liquid distributor is limited to a spray structure, and the refrigerant is sprayed through the spray liquid distributor. On the heat transfer surface of the heat exchange tube, the surface of the heat exchange tube is better wetted and has a better heat exchange effect.

[0031] The water source heat pump unit system suitable for low temperature water sources of the present invention has the following advantages:

[0032] 1. The evaporator adopts a falling film structure and the water system in the heat exchange tube bundle is a single-flow cycle. The refrigerant is evenly distributed to the heat exchange tubes through the liquid distributor above the evaporator to increase the heat exchange effect and fully evaporate the refrigerant. In turn, less refrigerant is stored at the bottom of the evaporator, which prevents too much ...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B39/02F25B30/06
CPCF25B39/028F25B30/06F25B2339/021
Inventor 周海瑞孙成利王梯阶
Owner SHANDONG YUGIA FUERDA AIR CONDITIONER EQUIP
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