Double source heat pump air conditioning unit

Abstract

The invention relates to a double source heat pump air conditioning unit which comprises a compressor, a four-way reversal valve, a refrigerant-water heat exchanger, a finned heat exchanger, a refrigeration throttling valve, a one-way valve, a heating throttle valve, an electromagnetic valve and a connecting pipeline, wherein the finned heat exchanger is arranged in a shell; the shell is internally successively provided with the fan, a sprinkler, the finned heat exchanger, a heat rejection padding and a water collecting disc from top to bottom, and the lower part of the shell is provided with an air inlet arranged between the water collecting disc and the heat rejection padding; the water collecting disc is connected with the sprinkler through a water circulating pump, and the two ends of the finned heat exchanger are respectively connected with the four-way reversal valve and the refrigerant-water heat exchanger; and the finned heat exchanger comprises a first finned heat exchanger and a second finned heat exchanger, and the first finned heat exchanger is connected with the second finned heat exchanger through the electromagnetic valve and the heating throttle valve which are parallel. The double source heat pump air conditioning unit provided by the invention is capable of overcoming the use defects of a simple air source heat pump unit and a water source heat pump unit, and is applicable to multiple environmental conditions; and the double source heat pump air conditioning unit has the advantages of low heat transfer temperature, notable energy-saving effect and high unit operation efficiency.

Description

technical field [0001] The invention relates to a heat-pump air-conditioning unit, in particular to a dual-source heat-pump air-conditioning unit, which belongs to the field of refrigeration and air-conditioning. Background technique [0002] The air source heat pump unit fluctuates greatly due to the influence of the ambient temperature. During cooling in summer, due to the high ambient temperature and high condensation pressure, the energy efficiency ratio decreases. Under extreme high temperature conditions, the cooling energy efficiency ratio of the air source heat pump unit is lower; Low, the fins are affected by frost, which makes the operation of the unit unstable and low in efficiency. During defrosting operation, it will also cause heat supply interruption, and the defrosting loss accounts for about 10% of the total energy loss of the heat pump. Water source heat pump unit, because the ground temperature is relatively stable throughout the year, its temperature ...

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Problems solved by technology

[0002] The air source heat pump unit fluctuates greatly due to the influence of the ambient temperature. During cooling in summer, due to the high ambient temperature and high condensation pressure, the energy efficiency ratio decreases. Under extreme high temperature conditions, the cooling energy efficiency ratio of the air source heat pump unit is lower; Low, the fins are affected by frost, which makes the operation of the unit unstable and low in efficiency. During defrosting operation, it will also cause heat supply interruption, and its defrosting loss accounts for about 10% of the total energy consumption loss of the heat pump.

Water source heat pump unit, because the ground temperature is relatively stable throughout the year, its temperature range is far smaller than the fluctuation of the air, it is a good cold and heat source, although the efficiency is high, but the soil buried pipe heat pump system is not only expensive, but also limited by the geographical location groundwater heat pump system, there is no good way to solve the problem of groundwater recharge at present, and it will also pollute groundwater, and many cities expressly prohibit the use of groundwater; surface water heat pump system can only be used in areas with abundant water resources Areas with relatively high water quality requirements

In order to overcome the defects of the simple air source heat pump unit and water source heat pump unit, the present invention provides a dual source heat pump air conditioner unit, which can be used under various environmental conditions, has low heat exchange temperature, flexible application, and high operating efficiency of the unit. high

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