Solar water heater with variable frequency circulating pump and water tank group and control method thereof
A technology of solar water heaters and variable frequency pumps, which is applied to solar collectors, solar collectors using working fluids, and solar thermal energy, and can solve problems such as low heat exchange efficiency, low solar energy utilization efficiency, and waste of electric energy in circulating pumps. To achieve the effect of improving heat exchange efficiency, making full use of it, and improving utilization efficiency
Inactive Publication Date: 2012-06-06
ZHEJIANG UNIV
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Problems solved by technology
[0002] Currently used solar water heaters generally only have one water tank for storing hot water. When the sunlight is abundant and the water in the water tank is fully heated, the solar water heater will be in an ineffective working state most of the time, and the efficiency of solar energy utilization is relatively low; at the same time , the circulation pump in the solar water heater usually works at a constant frequency, when the temperature difference in the heat exchange box is small, the heat exchange efficiency is low, resulting in the waste of electric energy of the circulation pump
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[0016] Such as figure 1 As shown, the present invention is provided with a heat supply circuit and a heat absorption circuit; the heat supply circuit is provided with a heat exchange medium heat supply circulation pipeline 5, a first frequency conversion pump 2, a solar heat collector 1, and a heat exchange box 3; The heat absorption circuit is provided with a water heat absorption circulation pipeline 6, a second frequency conversion pump 4, a heat exchange tank 3, and a water tank W in the water tank parallel branch. 1 ~Wn, water inlet side valve IN on the water tank parallel branch road 1 ~INn and the water outlet side valve OUT on the water tank parallel branch road 1 ~OUTn; the heat supply circuit and the heat absorption circuit have intersecting sections for heat exchange; the solar water heater is also provided with a controller 7 with a frequency conversion device; the solar water heater is also provided with a plurality of temperature sensors to detect solar energy r...
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The invention discloses a solar water heater with a variable frequency circulating pump and a water tank group and a control method thereof. The solar water heater consists of a solar collector, the variable frequency circulating pump, a heat exchange box, the water tank group, a valve bank and a controller, wherein the solar collector and the water tank group are provided with a temperature sensor respectively; each temperature sensor is connected with the controller; and the output of the controller not only controls the variable frequency speed regulation of the variable frequency circulating pump, but also controls the switching state of the valve bank. The method ensures the normal operation of the solar water heater, improves the utilization efficiency of solar energy, increases hotwater supplying amount, can reduce the electric consumption of the circulating pump, and has the advantage of high efficiency and energy conservation.
Description
technical field [0001] The patent of the present invention relates to a solar water heater equipped with a frequency conversion circulating pump and a water tank group and its control method. Background technique [0002] Currently used solar water heaters generally only have one water tank for storing hot water. When the sunlight is abundant and the water in the water tank is fully heated, the solar water heater will be in an ineffective working state most of the time, and the efficiency of solar energy utilization is relatively low; at the same time , The circulation pump in the solar water heater usually works at a constant frequency. When the temperature difference in the heat exchange box is small, the heat exchange efficiency is low, resulting in the waste of electric energy of the circulation pump. Contents of the invention [0003] The first technical problem to be solved by the present invention is to provide a solar water heater equipped with a frequency conversi...
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IPC IPC(8): F24J2/00F24J2/40F24J2/46F24S10/30
CPCY02E10/40Y02E10/44
Inventor 卢建刚王成立孙优贤
Owner ZHEJIANG UNIV