A heat pump system that can absorb the freezing heat of cold water

Abstract

The invention relates to the field of surface water heat energy utilization and discloses a heat pump system capable of absorbing the solidification heat of cold water. The heat pump system capable ofabsorbing the solidification heat of the cold water comprises a compressor, an evaporator, a throttling valve and a condenser, and is characterized by further comprising a deicing heat exchanger, a first cold water solidification heat exchanger, a second cold water solidification heat exchanger, a first ethylene glycol pump, a second ethylene glycol pump and a plurality of electromagnetic valves;the first cold water solidification heat exchanger and the second cold water solidification heat exchanger are immersed in the cold water; and the structure is compact, the heat exchanging efficiencyis high, deicing is convenient, and machining and manufacturing are easy. According to the heat pump system capable of absorbing the solidification heat of the cold water, the manner that heat mediumice melting is combined with water flow ice flushing is adopted to perform deicing, the deicing speed is high, deicing is thorough, and the deicing power consumption is small; and it can be achievedthat the solidification heat of the cold water is continuously extracted to supply heat for the indoor environment, and meanwhile it can be guaranteed that a unit keeps efficient and stable running for a long time. The heat pump system capable of absorbing the solidification heat of the cold water is especially suitable for heat supplying and heating of buildings located under a low-temperature environment.

Description

technical field [0001] The invention relates to the field of surface water thermal energy utilization, in particular to a heat pump system capable of absorbing the solidification heat of cold water. Background technique [0002] Surface water source heat pump is a new heating method that uses heat pump technology to obtain low-grade heat from surface water (such as river water, river water, lake water, etc.) to provide heating (heating, hot water) for buildings. It not only saves energy (efficiency is generally around 4), but also has no pollution to the environment, which has great market advantages. But as we all know, the temperature of surface water will drop with the drop of outdoor air temperature. Some studies have shown that when the temperature of outdoor air reaches -10°C, the temperature of surface water is only 4°C. Obviously, the surface water at such a temperature is almost There is no sensible heat available, which will inevitably lead to a sharp decline in t...

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Problems solved by technology

[0004] The existing deicing technology for extracting the freezing heat of cold water mainly has two aspects: one is mechanical ice scraping, which can realize continuous deicing with low power consumption, but its mechanical process is complicated (high processing precision is required), and the When the ice speed is too fast, it is difficult to remove the ice in time, and the wear and tear is large, the equipment is easily damaged, and the maintenance and repair are also very difficult

The other is hot gas melting ice, which is similar to the principle of the ice machine. When deicing, the four-way valve is reversed, and the high-temperature exhaust of the compressor is used to melt the ice. After the ice layer partially melts, it will fall off under its own gravity. This method has fast deicing speed and complete deicing, but the unit not only does not supply heat during deicing, but also absorbs heat from the room, which will cause the indoor temperature to drop, and the unit will frequently switch between heating and melting ice , this will lead to extremely unstable operation of the unit for large water source heat pump units, which will easily lead to unit failure, and the service life and operating efficiency (energy efficiency ratio) of the unit will be greatly reduced

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