Control method of pressure-limiting glass evacuated solar water heater without water tank

Abstract

The invention relates to a control method of a pressure-limiting glass evacuated solar water heater without a water tank. An electric heating pipe and a water temperature / level sensor are arranged in a heat collector. A water feeding valve is arranged on a water inlet pipe of the heat collector. A hot water faucet, a water flow sensor, a check valve, a relief valve, a water pressure switch, a safety valve, an expansion valve and an intake valve are sequentially arranged in the direction from the water outlet of a water outlet pipe of the heat collector to the heat collector. The water pressure switch is electrically connected with the water feeding valve and a controller. The water outlet pipe between the check valve and the water flow sensor is connected with the water inlet of the waterinlet pipe by a cold water pipe which is provided with a signal valve. The water flow sensor, the intake valve, the relief valve and the signal valve are all connected with the controller. The solar water heater adopts the method of using the water pressure switch on the water outlet pipe to detect the water pressure in the heat collector and to combine the signal valve on the cold water pipe to ensure the water heater to supply water normally, which is simple in structure, reasonable in design, safe, convenient, good in freeze-proof and shock-proof effects, high in intelligent control degreeand free from potential safety hazard.

Description

technical field [0001] The invention relates to a tankless solar water heater, in particular to a control method for a pressure-limiting tankless glass vacuum solar water heater. Background technique [0002] Traditional wall-mounted solar water heaters with water tanks use secondary heat conduction to collect heat. Although the water tank can withstand pressure, the heat collection efficiency is low and the cost is high. The existing tankless glass vacuum solar water heater adopts large-diameter glass vacuum tubes to form a heat collector that not only collects heat but also stores heat. It is widely used because of its relatively small volume and good heat collection effect in the sun. For example, the all-weather tankless glass vacuum pressurized solar water heater disclosed in patent 200510095034.4, when hot water is used, pressurized cold water is used to push the hot water from the lower part of the heat collector to the upper part of the heat collector and then discha...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problems in the prior art that the glass vacuum solar water heater without a water tank cannot automatically adjust the internal pressure, the use safety factor is low when the pressure is too high, and there are potential safety hazards, the pressure is too small and cannot be used for normal water supply, and the degree of intelligent control is low. The purpose of the present invention It provides a control method for a pressure-limiting tankless glass vacuum solar water heater that can effectively limit the internal pressure of the tankless glass vacuum solar water heater, is easy to use, has normal water supply, and has a high degree of intelligent control.

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