A standard water tank for performance testing of heat pump water heaters

Abstract

The invention provides a standard water tank for testing the performance of a heat pump water heater. The standard water tank comprises an outer tank body and an inner tank body, wherein thermal insulation material is arranged between the outer tank body and the inner tank body, a water feeding opening, a water returning opening, a water replenishing opening, a vent pipe, a sewage draining opening, an overflow opening, a water discharging opening, an accessing opening, and a volume scale are formed in the tank body, a sprinkler pipe is arranged inside the tank, the bottom of the sprinkler pipe is fixed, the upper part of the sprinkler pipe is connected with the water returning opening formed in the tank body, the sprinkler pipe is positioned on the vertical geometry central section inside the tank and the hole is drilled through equal pressure, uniformly distributed temperature measuring blind holes are formed in the inner wall of the tank body at same height intervals, and a temperature sensor is inserted in each blind hole. As the sprinkler pipe is positioned on the vertical geometry central section inside the tank and the hole is drilled through equal pressure, and that the hot and cold water in the tank is mixed uniformly is ensured. The water temperature measurement accuracy is improved by the method of taking average value by multi-point testing.

Description

technical field [0001] The invention relates to a testing device for a heat pump water heater and other water heaters, in particular to a standard water tank for performance testing thereof. Background technique [0002] The performance test of the circulating air source heat pump water heater (machine) requires a constant temperature water tank. The specific value of the water temperature in the water tank will affect the calculation result of the coefficient of performance COP, so the accuracy of the water temperature measurement directly affects the accuracy of the performance coefficient measurement. The existing water tank constant temperature and temperature measurement technology is that when the water temperature in the water tank is higher than the temperature of the test water, the cooling water of the refrigerating unit is mixed with the water in the water tank to generate the constant temperature water required for the test. When the water in the water tank is lo...

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Problems solved by technology

[0005] The object of the present invention is that the technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, provide a large-capacity standard water tank for heat pump water heater performance testing, and solve the technical problems of uneven mixing of cold and hot water and inaccurate temperature measurement. Especially large-capacity standard water tanks for performance testing of heat pump water heaters

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