Anti-freezing solution regenerating and recovering device used for refrigerating air-conditioning system

Abstract

The invention discloses an anti-freezing solution regenerating and recovering device used for a refrigerating air-conditioning system, which comprises a regenerating container and a steam condensing heat recoverer. The regenerating container and the steam condensing heat recoverer are connected with each other through a steam passage, a heater is arranged in the regenerating container, and the regenerating container is respectively connected with a low-concentration anti-frozen solution passage and a high-concentration solution passage, a first heat exchanger is arranged in the steam condensing heat recoverer and provided with a heat exchange medium inlet and a heat exchange medium outlet respectively, and the steam condensing heat recoverer is provided with a condensate water outlet. The anti-freezing solution regenerating and recovering device has the advantages of regeneration of anti-freezing solution, heat recovering and frost-free running of a heat pump and the like, freezing of the anti-freezing solution is avoided, and high-efficiency, continuous and stable heat supplying of the heat pump air conditioning system is technically guaranteed by heat collecting of a steaming type condenser or a water cooling tower. Further, the application range of an air source heat pump of the steaming type condenser or the water cooling tower is effectively expanded at low-temperature areas.

Description

technical field [0001] The invention relates to heat recovery and utilization technology of antifreeze solution for air-conditioning, in particular to a heat recovery device for regeneration of antifreeze solution used in refrigeration and air-conditioning systems. Background technique [0002] Using evaporative condensers or cooling water towers (water-cooled energy towers) to obtain heat from the outdoor air and provide thermal energy for the heat pump air-conditioning system in winter is an important way to achieve efficient and stable heat supply. Compared with air source heat pumps, its replacement It has high thermal efficiency, saves heat exchanger materials, can realize continuous heating, and has a significant prospect of energy saving and emission reduction. However, when the temperature of the brine (cooling water) in the evaporative condenser or cooling water tower is lower than 0°C, the brine will freeze into ice, and the evaporative condenser or cooling water t...

AI Technical Summary

Problems solved by technology

However, when the temperature of the brine (cooling water) in the evaporative condenser or cooling water tower is lower than 0°C, the brine will freeze into ice, and the evaporative condenser or cooling water tower and its connected parts may be damaged. The risk of expansion crack damage, at this time, the selection of an appropriate concentration of antifreeze solution can ensure that the components work normally at low temperatures

In addition, when the heat pump works, after the evaporative condenser or the cooling water tower takes heat from the air, the temperature of the air will drop, which will cause the moisture in the air to condense, and this part of the condensed water will enter the antifreeze solution, which will lead to the dilution of the antifreeze solution. As the concentration of the antifreeze solution decreases, the freezing point of the antifreeze solution will increase. If the concentration of the antifreeze solution is not increased in time (or called solution regeneration), the evaporative condenser or the solution pool of the cooling tower, the water pump and other components still have the risk of expansion and cracking.

In order to solve this problem, at present, the diluted solution is often added with high-concentration antifreeze, and the overflowed diluted antifreeze solution is stored in an indoor or underground solution storage tank. After the outdoor temperature rises, the diluted antifreeze The solution is pumped into the evaporative condenser or cooling water tower, and the energy in the air is used to realize the regeneration of the solution. This method inevitably requires a high concentration of antifreeze, a large capacity storage tank for concentrated solution and dilute solution, resulting in a large amount of antifreeze used, The solution storage space is huge, the initial investment is extremely high, and the operating cost of antifreeze is increased, which greatly limits the applicable areas of evaporative condensers or cooling water towers as heat pump heat extraction devices in low temperature areas

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