Three-box type temperature impact test box

Abstract

The invention relates to a three-box type temperature impact test box, which comprises a box body, an electrical cabinet, an electrical system, a refrigerating system and a heating system, wherein the interior of the box body is divided into a high temperature area, a test area and a low temperature area from the top to the bottom, pneumatic doors are arranged between the test area and the high temperature area and between the test area and the low temperature area, the pneumatic doors are connected with air cylinders, the heating system and a temperature resisting circulation fan are arranged in the high temperature area, the refrigerating system and a temperature resisting circulation fan are arranged in the low temperature area, and temperature resisting circulation fans are respectively arranged in a high temperature box body and a low temperature box body. The three-box type temperature impact test box disclosed by the invention has a novel structure and is convenient to use, a three-box type temperature impact and control process is adopted to completely overcome the defect of temperature interpenetration, the action speed of the pneumatic doors is high, and the switching process of the high temperature area and the low temperature area can be completed within 3 seconds. The travel switch fault caused by conventional motor pullup and the defect of pull deformation of the box body are avoided, the temperature in the box body is uniform and stable, and the working efficiency is greatly improved.

Description

[Technical Field] [0001] The invention relates to the technical field of sample temperature shock test instruments, in particular to a three-box temperature shock test box. [Background technique] [0002] At present, the common temperature shock test chambers are all two-box structures, which are divided into high temperature zone and low temperature zone. The switching of the experimental area is by pulling the sample rack from the low temperature area to the high temperature area in the entire box, and then lowering it from the high temperature area to the low temperature area, repeatedly performing high and low temperature impacts. The lifting and lowering of the sample rack is detected by installing a travel switch on the motor pull control track. The travel switch often fails for a long time, and the box will be deformed in severe cases. In addition, the lifting and lowering time of the sample rack is 5-8 seconds. During this process, the temperature of the high temperature...

AI Technical Summary

Problems solved by technology

The lifting and lowering of the sample rack is detected by installing a travel switch on the control track of the motor. The disadvantage of the long-term use of the travel switch often occurs, and the cabinet will be deformed when it is serious.

In addition, the lifting time of the sample rack is 5-8 seconds. During this process, there will be temperature interpenetration between the high temperature zone and the low temperature zone, which will cause serious impacts when the temperature changes suddenly.

[0003] The control instruments in the temperature shock box have the disadvantages of cumbersome operation, complicated operation, and low control accuracy, which have brought a lot of inconvenience to customers in terms of test accuracy and use.

Images