Solar water heating system assisting heating through air source heat pump and boiler and control method

Abstract

The invention discloses a solar water heating system assisting heating through an air source heat pump and a boiler and a control method. The system comprises a solar heat collector, an air source heat pump unit, a boiler set, a small water tank connected with a water inlet valve, a large water tank, a water supply pump, a water return valve and a control system, wherein the large water tank is connected with a water supplementing pump and a water supplementing valve, the water supply pump is arranged on a user water supply pipe, and the water returning valve is arranged on a water returning pipe. A second temperature sensor is arranged outdoors. According to the solar water heating system, solar energy can be preferably used, the starting frequency of the air source heat pump and the boiler is reduced as much as possible, the starting time of the air source heat pump and the boiler is shortened as much as possible, and energy consumption is reduced while the requirement of users for hot water is met.

Description

technical field [0001] The invention belongs to the technical field of solar water heating systems, and in particular relates to a solar water heating system and a control method for an air source heat pump and boiler auxiliary heating. Background technique [0002] Preparation of domestic hot water is an indispensable part of human activities. With the continuous strengthening of social awareness of energy conservation and emission reduction, reducing energy consumption when producing domestic hot water has become the focus of current work. [0003] Solar energy is a clean and renewable energy source, so solar water heating systems have been widely promoted in our country. In places where the light intensity cannot meet the demand, air source heat pumps are usually introduced to assist heating solar energy systems; but when the weather conditions are bad, some users When it is necessary to provide a large amount of domestic hot water in a short period of time to meet the de...

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Problems solved by technology

[0003] Solar energy is a clean and renewable energy source, so solar water heating systems have been widely promoted in our country. In places where the light intensity cannot meet the demand, air source heat pumps are usually introduced to assist heating solar energy systems; but when the weather conditions are bad, some users When it is necessary to provide a large amount of domestic hot water in a short period of time to meet the demand, solar and air source heat pumps cannot meet the needs of such users due to their reduced efficiency, and boilers are introduced to assist in heating the system, thus forming an air source heat pump and boiler auxiliary heating solar water heating system

[0004] The introduction of air source heat pumps and boilers will definitely increase the energy consumption of the solar water heating system, but how to reasonably control the linkage of these three systems, so as to maximize the use of solar energy, meet the needs of users for domestic hot water, and meet the The user's demand for domestic hot water has become an urgent problem to be solved

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