Novel water-saving and energy-saving solar water heating system and using method thereof

Abstract

The invention discloses a novel water-saving and energy-saving solar water heating system and a using method thereof. The system comprises a solar water heater, a water inlet and outlet pipe, a water-saving pipe, an energy-saving pump, an electromagnetic valve and a controller, the water-saving pipe comprises an inner pipe and an outer pipe, the solar water heater is connected to a water inlet of the inner pipe and a water inlet of the outer pipe, a water outlet of the inner pipe and a water outlet of the outer pipe are connected to an inlet and an outlet of the energy-saving pump respectively, the water outlet of the inner pipe is further connected to the electromagnetic valve, an outlet of the electromagnetic valve is connected to the water inlet and outlet pipe, a first temperature sensor and a second temperature sensor are arranged in the solar water heater and the water outlet of the inner pipe respectively, and the controller is connected to the first temperature sensor, the second temperature sensor, the energy-saving pump and the electromagnetic valve. According to the system, the cold and hot water circulation heat exchange function is achieved, and cold water does not need to be discharged, such that a large amount of water resources are saved; and only little energy of the energy-saving pump needs to be consumed in a circulation heat exchange process, such that the good energy-saving performance is achieved, and energy conservation and emission reduction are achieved.

Description

technical field [0001] The invention belongs to the field of solar photothermal technology, and in particular relates to a novel water-saving and energy-saving solar water heating system and a method for using the same. Background technique [0002] The solar water heating system is a heating device that converts solar energy into heat energy, and heats water from low temperature to high temperature to meet the needs of people's daily life and production. Solar water heaters are divided into vacuum tube solar water heaters and flat plate solar water heaters according to their structure. At present, vacuum tube solar water heaters are the main ones. Vacuum tube household solar water heaters are composed of heat collecting tubes, water storage tanks, brackets and other related parts. The conversion of solar energy into heat mainly depends on vacuum heat collecting tubes. Get the hot water you need. [0003] However, the existing solar water heating system has the following p...

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Problems solved by technology

[0004] 1. The hot water pipeline is generally more than ten meters long, and the low-temperature water accumulated in it needs to be drained every time it is used, and it takes a while for the outlet water temperature of the hot water pipeline to meet the usage requirements, and the previous outlet water also needs to be drained. This will cause a great waste of water resources, and the process of draining cold water also needs to consume a certain degree of energy

[0005] 2. In the northern region, due to the cold climate, it is necessary to lay an "electric heating antifreeze belt" on the outdoor pipeline of the solar water heater. Although this can have an antifreeze effect to a certain extent, the operation of the "electric heating antifreeze belt" consumes a lot of electric energy

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