Solar energy and air source heat pump coupled hot water system

Abstract

The invention discloses a solar energy and air source heat pump coupled hot water system. The system has three operation modes; when solar sunlight is sufficient, solar energy is adopted to directly supply heat; and when the solar energy is insufficient, an air source heat pump system is used for supplying hot water. In addition, a heat storage device is provided for storing the heat of the solar energy in a heat pump heating mode, and is used as a low-temperature heat source in regeneration of a solid absorption dehumidifying agent in a regeneration mode; and at this time, the solar energy continuously feeds the heat to the heat storage device to meet the heat requirements in regeneration of adsorbent so as to realize frostless operation of a heat pump and recycling of dehumidification adsorbent. On the basis of fully using the solar energy to supply the heat, a heat pump heating system is additionally provided to realize continuous hot water supply; and the solar heat stored in the heat storage device is used as the low-temperature heat source in regeneration of the dehumidification adsorbent to realize frostless operation of the air source heat pump.

Description

technical field [0001] The invention belongs to the technical field of refrigeration equipment, and in particular relates to a solar energy and air source heat pump coupled hot water system. Background technique [0002] Solar energy is clean and environmentally friendly, without any pollution, and has high utilization value. It is currently widely used, especially in the field of building heating. Solar thermal systems are the main solution for domestic hot water; while air source heat pumps occupy less space, are energy-saving and environmentally friendly. , Convenience, and high heating energy efficiency ratio, it is also favored by more and more people in the field of building heating. Among them, the solar water heating system is greatly affected by weather conditions, and its volatility is contrary to the stable demand for domestic hot water. At present, electric auxiliary heating systems are mostly used, but the power consumption is large and the energy saving perform...

AI Technical Summary

Problems solved by technology

When the air source heat pump is operating under frosting conditions, as the frost layer thickens, the heating performance of the heat pump will become worse and worse, and its heating capacity will drop sharply as the outdoor temperature drops, especially in the cold north In regions and high-humidity and cold south, compressor shutdowns or low-voltage protection may be triggered frequently, which will affect the use. Therefore, the frosting problem of air-source heat pumps under low-temperature conditions seriously restricts the development of air-source heat pumps.

Among the various defrosting methods today, electric heating defrosting is only suitable for small devices and consumes more power. Reverse cycle defrosting will cause impact on system components, hot gas bypass method will cause a decrease in heating capacity, and heat storage dry defrosting There is no suitable low-level heat source when using the method, and the defrosting energy source is insufficient. The defrosting performance in actual operation is not satisfactory, and the stability and reliability are also poor.

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