Natural convection ambient temperature simulation text box

Abstract

The invention discloses a natural convection ambient temperature simulation text box comprising a test box body capable of insulating the heat, a first support frame, a heater and a temperature-drop device controlled to work, wherein at least one air inlet hole is formed at the lower part of a base plate of the test box body or at least one side plate; at least one exhaust hole is formed at a top plate; at least one heat-conducting column penetrating through the side plate is embedded at least one side plate of the test box body; the first support frame can be used for supporting an object to be tested; a base plate of the first support frame, which is away from the test box body, is arranged inside the test box body; the heater is arranged below the first support frame and connected to a temperature controller and controlled by the temperature controller; and the temperature-drop device acts on the heat-conducting column and can be used for conducting the heat in the test box body out of the test box by the heat-conducting column. By controlling the temperature rise of the heater or the temperature drop of the temperature-drop device, the temperature in a test area is maintained at the preset temperature and the accurate control of the temperature on the test area can be realized.

Description

technical field [0001] The invention relates to a temperature control device, in particular to a natural convection ambient temperature simulation test box. Background technique [0002] In the aging test, performance test, temperature rise test and other related tests of the product, it is often necessary to use the ambient temperature simulation test box to simulate the applicable temperature environment. The structure of the traditional ambient temperature simulation test box is to install an air supply device in an oven, use the oven to heat to a predetermined temperature, and then use the air supply device to blow air to generate air convection, so that the temperature inside the oven becomes uniform. , so as to simulate different ambient temperatures for product testing. [0003] Aiming at the defects of low test reliability and high operation risk in the traditional ambient temperature simulation test box, people have developed a natural convection ambient temperatur...

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Problems solved by technology

[0004] Compared with the traditional test box, although the natural convection ambient temperature simulation test box disclosed in this patent document has made considerable improvements, it still has the following problems: 1. The test box cannot achieve precise temperature control. When the temperature is too high, the temperature cannot be cooled in time. The only way to reduce the temperature is by stopping the heating device and relying on convection heat dissipation. The efficiency is low and cannot be controlled. Moreover, because there is no cooling device, the test temperature range in the test box is determined. It can only be higher than the external ambient temperature; 2. The air duct formed by the box of the test box fails to achieve true natural convection. When the heated air rises to the top of the box and is discharged from the exhaust hole, Air vortices will be generated, causing the hot air in the vortex generation area to be unable to be discharged in time, and a heat accumulation area will be formed in this area. In this case, the test structure obtained by the test is inconsistent with the test structure obtained under normal natural convection conditions. inaccurate testing

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