Solar heat collector and air source heat pump combined hot water supply system and control method

Abstract

The invention discloses a combined hot water supply system and a control method of a solar heat collector and an air source heat pump. The combined hot water supply system includes a controller (11), a water tank (7), an air source heat pump (9) and a solar heat collector device (10); the air source heat pump is connected to the water tank through the first water pipe to form an air source heat pump circulation loop, and the first water pipe is provided with an air source heat pump circulating water pump (8); the solar heat collector The second water pipe is connected with the water tank to form a solar heat collector circulation loop, and the second water pipe is provided with a solar heat collector water pump (6). The present invention controls the opening and closing of the solar heat collector according to the preset temperature difference between the collector outlet water temperature and the water tank outlet water temperature, and accurately implements the opening and closing of the air source heat pump according to the preset temperature reference line. control. The combined hot water supply system and method of the solar heat collector and the air source heat pump have remarkable energy-saving effects.

Description

technical field [0001] The invention relates to a combined hot water supply system and a control method of a solar heat collector and an air source heat pump. Background technique [0002] Air source heat pump, also known as "air source heat pump water heater", "air-conditioning water heater" and so on. The "air energy water heater" absorbs the low-temperature heat in the air, and converts it into high-temperature heat energy through a heat pump to heat the water. The air-energy water heater has the characteristics of high efficiency and energy saving. It produces the same amount of hot water, and has higher energy efficiency than the electric-assisted solar water heater. As the name implies, the air source heat pump water heater is to transfer the heat in the air to the water through the refrigerant. The traditional electric water heater and gas water heater obtain heat energy by consuming gas and electric energy, while the air energy water heater heats water by absorbing ...

AI Technical Summary

Problems solved by technology

The start and stop of the air source heat pump is judged by the average water temperature of the water tank. If the average water temperature of the water tank does not reach the water supply temperature, the air source heat pump will be turned on, and the heat pump will be turned off until the average water temperature of the water tank reaches the water supply temperature. It is heated to the water supply temperature in a short time, which greatly reduces the utilization rate of solar collectors

Therefore, due to the lack of precise control of the air source heat pump, the utilization rate of the solar collector is reduced, so that the air source heat pump performs more unnecessary operations, resulting in greater energy waste

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