An Environmental Wind Tunnel Temperature Control System

Abstract

The invention discloses an environmental wind tunnel temperature control system, which includes a wind tunnel heat exchanger, a main pipe circuit and a plurality of heat exchange branches, the wind tunnel heat exchanger is installed in the expansion section of the wind tunnel, and the main pipe circuit is connected to the air tunnel The inlet and outlet pipelines of the heat exchanger, a plurality of heat exchange branches are connected in parallel to the main circuit and can circulate independently with the help of the main circuit. The heat exchange branch includes a refrigerant circulation unit and a heat exchange circulation unit. The brine circulation unit includes an outflow pipeline, a return pipeline, a drive pump, a three-way valve, and an adjustment branch. The outflow pipeline connects the main circuit and the heat exchange circulation unit, and three-way pipes are installed in sequence along the flow direction on the outflow pipeline. The valve and the driving pump, the return pipeline is connected to the main circuit and the heat exchange circulation unit downstream of the outflow pipeline, and the regulating branch is connected to the outflow pipeline and the return pipeline by means of the three-way valve. The invention adopts a three-way valve to change the mixing ratio according to the temperature feedback, the variable is unique, and the adjustment is simple.

Description

technical field [0001] The invention relates to an environment wind tunnel temperature control system, in particular to a temperature control system for automobile environment simulation wind tunnel tests. Background technique [0002] The environmental wind tunnel is mainly used for matching research and development of air conditioning systems and cooling systems of aircraft, automobiles, trains and other means of transportation, thermal management verification and other related test work, to study the influence of different environmental factors on the performance of test products and the system matching optimization of power propulsion systems , to assess the environmental adaptability of the test product. Environmental wind tunnels generally have the ability to simulate climate factors such as high temperature, low temperature, rainfall, snowfall, and sunlight. [0003] The environmental wind tunnel temperature control system is the key system of the environmental wind ...

AI Technical Summary

Problems solved by technology

[0004] The process design and adjustment method of the existing environmental wind tunnel temperature control system are not high in accuracy and consume a lot of energy. For example, the high temperature is directly heated by a pipeline electric heater, and the heat exchange cycle system uses more than two two-way control valves. Adjustment, the low temperature uses the low temperature refrigeration system to exchange heat with the brine system to realize the low temperature test, but the cooling water system and the brine system are independent of each other and have no direct heat exchange, which makes the temperature control accuracy of the environmental wind tunnel not high, and the temperature of the environmental wind tunnel test is low. Load changes cannot be quickly and accurately responded to, etc.

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