Low-power heat dissipation performance test inlet oil and water temperature stabilizing device

Abstract

The invention belongs to the technical field of vehicle engineering, and particularly relates to a low-power heat dissipation performance test inlet oil and water temperature stabilizing device. The device comprises a water circulation loop, an equipment water inlet temperature cooling device, an equipment water inlet temperature rising device, an equipment oil inlet temperature cooling device and an equipment oil inlet temperature rising device, wherein the pipeline caliber of the equipment water inlet temperature cooling device is set to be smaller than that of the water circulation loop; the pipeline caliber of the equipment oil inlet temperature reducing device is set to be smaller than that of the oil circulation loop; the device is designed to be an inlet oil and water temperature stabilizing device for a heat dissipation performance test of a small-power radiator of a cooling system of a first special vehicle in China; the heat exchanger and the electric heating wire are mounted on the oil and water loops at the inlet of the equipment, so that the water temperature at the inlet of the equipment is accurately regulated; through PID control of the heat exchanger and the electric heating wire, the temperature of oil and water at the inlet of the equipment can be quickly adjusted.

Description

technical field [0001] The invention belongs to the technical field of vehicle engineering, and in particular relates to a temperature stabilizing device for imported oil and water for a small-power heat dissipation performance test. Background technique [0002] In the heat dissipation performance test of the radiator, it is necessary to heat the oil temperature and water temperature at the inlet of the radiator to a certain temperature to simulate the temperature of the oil and water inlet of the radiator in actual working conditions. Heat transfer oil is usually used in radiator performance tests to heat the oil and water required for the test. The principle of the test is to heat the heat transfer oil through boiler combustion, transfer the heat of the heat transfer oil to the oil and water required for the test through the intermediate heat exchanger, and use PID to control the flow of the heat transfer oil to adjust the oil temperature and water temperature required fo...

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Problems solved by technology

According to the heat transfer formula Q=CMΔT, especially for mediums with small specific heat capacity such as oil, when the flow rate required for the test is small, the heat transfer amount in the heat exchanger changes slightly, which will lead to a decrease in the inlet oil temperature of the radiator. Large fluctuations. At this time, it is difficult to stabilize the inlet water temperature and oil temperature of the radiator within ±0.2°C, and continuous adjustment is required, which reduces the test accuracy and increases the difficulty of the test operation.

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