Durability tester for temperature controller

Abstract

The invention discloses a durability tester for a temperature controller, which comprises a power supply unit, a load unit, a detection control unit, an output unit, a heating unit and a cooling unit. The durability tester is characterized in that the heating unit comprises a copper block in which a heating pipe is arranged, the heating pipe is connected with the power supply unit, an upper surface of the copper block is provided with a thermoelectric couple for acquiring the temperature of the copper block in real time, the thermoelectric couple is connected with the detection control unit, and the upper surface of the copper block is further provided with an insulating heat-resistant pressure plate for fixing a temperature sensitive part of a temperature controller; the cooling unit is a cooling airflow sprayer arranged over the insulating heat-resistant pressure plate and connected with an external air pump of the tester; and the temperature controller is connected with an input end of the load unit through a lead. The durability tester has the advantages that the heating mode of the tester is small in thermal inertia, so that an adjustable range of the conduction and the disconnection of the temperature controller is large, the range of the heating temperature is large, the heating temperature and the cooling speed can be accurately controlled, accuracy of the test result can be improved, and the tester is simple in structure and low in cost.

Description

technical field [0001] The invention relates to a measuring instrument, in particular to a temperature controller durability tester. Background technique [0002] Thermostat Durability Tester is a special equipment for durability test of thermostats used in household appliances such as refrigerators, refrigerators, air conditioners, and electric water heaters. The durability test simulates the normal working process of the thermostat by means of heating and cooling, so as to detect the limit of normal use times of the thermostat. [0003] The existing thermostat durability tester mainly includes a power supply unit, a load unit, a detection control unit, a display unit, a heating unit and a cooling unit. The test process is to place the sample-thermostat in the heating unit, and heat Let the thermostat reach the operating temperature, and then reset the thermostat by cooling to complete a working cycle, and finally obtain the durability of the thermostat. [0004] At prese...

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Problems solved by technology

[0004] At present, the heating methods of the heating unit mainly use halogen tungsten lamps, electric soldering irons, electric heating coils, and hot air guns, etc., but the above heating methods mainly have the following disadvantages: (1) The thermal inertia of halogen tungsten lamps, electric soldering irons, and electric heating coils The impact is large, and the on-off adjustable range of the thermostat is small, which cannot meet the standard requirements; (2) The halogen tungsten lamp, electric soldering iron, and electric heating coil are limited by the structure, the heating temperature range is not large, and the heating temperature of the heat gun is not easy to control accurately, etc. Insufficient; (3) Since tungsten halogen lamps, electric soldering irons, and electric heating coils are greatly impacted by cold and heat, the service life is not long, so the maintenance cost is expensive

The cooling method of the cooling unit mainly uses natural wind or cold wind to lower the temperature of the entire thermostat, but there are mainly the following defects: (1) cooling is to cool the entire thermostat, resulting in poor control of the cooling speed and slow speed; (2) The fixed part of the tested part adopts a rocker structure. During the durability test, the position of the thermostat changes between the cold and heat sources, which deviates from the actual working state of the thermostat, resulting in inaccurate test results.

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