User work station of damper tube type central-household solar water heating system

Abstract

The invention discloses a user work station of a damper tube type central-household solar water heating system. The user work station comprises a three-way electronic control valve for controlling the flow direction of a heat medium, a fluid damper, a heat medium temperature sensor and a control device, wherein a liquid inlet of the three-way electronic control valve is communicated with a heat medium inlet; a first liquid outlet of the three-way electronic control valve is communicated with a heat medium outlet; a second liquid outlet of the three-way electronic control valve is communicated with one end of the fluid damper; and the other end of the fluid damper is communicated with a heat medium bypass inlet and a heat medium bypass outlet. The user work station also includes a hot water temperature sensor arranged in a temperature insert of a user hot water storage tank; the heat medium temperature sensor is arranged on the upstream of the liquid inlet of the three-way electronic control valve; and the hot water temperature sensor, the heat medium temperature sensor and the three-way electronic control valve are respectively electrically connected with the control device. The user work station can prevent heat of water in the user hot water storage tank from being transferred to the heat medium, and can ensure uniform heat absorption of each user hot water storage tank.

Description

technical field [0001] The invention relates to a solar water heating system, in particular to a damping tube type centralized-household solar water heating system user workstation. Background technique [0002] The existing centralized-household solar water heating system is composed of solar collectors, multiple household hot water storage tanks with heat exchange coils, circulating water pumps and controllers, etc. The heat medium in the collectors (Antifreeze) is connected in parallel with the heat exchange coils in each household hot water storage tank through the output header and return header to form a heat medium circuit; when the heat medium passes through the heat exchange coils, it transfers heat to the household heat storage tap water in the water tank, and the household hot water storage tank has a tap water inlet and a hot water outlet. The solar hot water system with this structure has the following defects: first, when the tap water temperature in the house...

AI Technical Summary

Problems solved by technology

The solar hot water system with this structure has the following defects: first, when the tap water temperature in the household hot water storage tank is higher than the temperature of the heat medium, there is a phenomenon of heat backflow; second, the heat absorption of each household hot water storage tank is uneven , this is because the hydraulic pressure and flow rate of the heat medium flowing through the heat exchange coils of the upstream and downstream household hot water storage tanks are constantly changing with the number of online users; the third is that the circulating water pump needs to use a frequency conversion pump, and the price is high; if Using a common circulation pump, the output pressure of the pump changes continuously with the number of online users, and the service life of the pump is short. If all users stop heat exchange, an infinite loop may occur

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