Electrothermic constant temperature water bath case and water temperature control method thereof

Abstract

The invention is applicable to the field of a water bath tank, and provides an electric heating constant temperature water bath tank and a method for controlling the water temperature, wherein the water bath tank comprises a water tank, a circulatory waterway consisting of a water inlet pipe and a water outlet pipe which are connected with the water tank, a water pump positioned on the circulatory waterway, and an inside temperature sensor arranged in the water tank. The water bath tank also comprises a plurality of groups of heating pipes, a heat dissipation parameter detector and a constanttemperature control device, wherein the plurality of groups of heating pipes arranged in the water tank, each group of the heating pipes comprise at least one heating pipe; the heat dissipation parameter detector arranged on the circulatory waterway; and the constant temperature control device for computing the heat dissipated by the water circulation according to the heat dissipation parameter and controlling the work of the heating pipes. According to the temperature changes on the water inlet end and the water outlet end of the water tank, the embodiment of the invention computes the heat dissipated by the water circulation, controls the compensation heat of the heating pipes, and adjusts the water temperature so that the water temperature control precise can reach a range of + / - 0.2 DEG C, and the requirements on a performance test for a vehicle radiator are met.

Description

technical field [0001] The invention belongs to the field of water baths, in particular to an electric heating constant temperature water bath and a water temperature control method. Background technique [0002] There are many types of water baths in the prior art, which can be used in hospitals, laboratories and other fields. Different application fields have different requirements for the temperature control accuracy of the water baths. When controlling the constant temperature of the water bath, one solution is to install a circulating water pipe outside the water bath to extract the water in the water bath, and then inject it into the water bath after heating. The water temperature control accuracy is 1°C. Another solution is to use two water tanks, that is, a water bath tank and a heating water tank. A circulating water pipe with a water pump is connected between the two tanks. The water is heated in the heating water tank and enters the water bath tank through the cir...

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Problems solved by technology

[0003] The purpose of the present invention is to provide an electric heating constant temperature water bath box, aiming to solve the problem that the water temperature control accuracy of the existing water bath box is low and it is difficult to meet the requirements of the performance test of the automobile radiator

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