Transcritical carbon dioxide air source heat pump system with backwashing function

Abstract

The invention discloses a transcritical carbon dioxide air source heat pump system with a backwashing function, which comprises a supercritical CO2 heat pump system, a circulating water system, and a supercritical carbon dioxide backwashing system. The system realizes the integration of the heat pump system and the backwashing system, reduces the overall size of the heat pump system and the backwashing system, and saves space, the circulating water system and the backwashing system are connected with each other by adopting an electromagnetic valve, the on-off of the backwashing system is controlled by acquiring circulating water side information, automated control is realized, and manpower and material resources are saved. Supercritical CO2 is a good heat exchange medium, and can transfer heat to water in a condenser, and the heat transfer property of the supercritical CO2 is sufficiently utilized. The supercritical CO2 and an entraining agent are utilized to clean off circulating water side dirt, and thereby the cleaning property of the supercritical CO2 is sufficiently utilized. By adopting CO2 as a working medium, the recycling of the greenhouse gas is realized, and energy saving and environment protection are embodied.

Description

technical field [0001] The invention relates to the field of air source technology, in particular to a transcritical carbon dioxide air source heat pump system with backwashing function. Background technique [0002] The water side of the cooler in the heat pump system contains carbonates such as calcium and magnesium. Affected by high temperature, scale will form on the inner pipe wall. When there is a lot of scale, the water flow inside the cooler will decrease and its heat transfer will be weakened. Efficacy, when the fouling is serious, it will lead to dangers such as pipe bursts. However, common cleaning methods usually use acid-base cleaning agents, which will corrode the materials of the cooler and waste a lot of water during the cleaning process. Therefore, a new cleaning method is needed to clean the scale in the cooler. [0003] The kinetic properties of supercritical CO2 are similar to those of gaseous CO2, and have the diffusibility of gas. Its density is close...

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Problems solved by technology

[0002] The water side of the cooler in the heat pump system contains carbonates such as calcium and magnesium. Affected by high temperature, scale will form on the inner pipe wall. When there is a lot of scale, the water flow inside the cooler will decrease and its heat transfer will be weakened. Efficacy, when the fouling is serious, it will cause dangers such as pipe bursts

Ordinary cleaning methods, usually using acid-base cleaning agents, will cause corrosion to the cooler material, and the cleaning process wastes a lot of water, so a new cleaning method is needed to clean the scale in the cooler

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