1, the inner liner adopts imported stainless steel (SUS304) mirror plate, with excellent corrosion resistance and high temperature resistance, to ensure the stability and durability of the test machine in harsh environments.

2, the outer bile is processed by superior A3 steel plate CNC machine tool, and the shell surface is sprayed with plastic treatment, which is more bright and clean and beautiful. This design not only makes the appearance of the equipment beautiful, but also enhances the protective performance of the equipment.

3, the insulation material is made of high density glass fiber cotton, and the insulation thickness is 100mm, which has good insulation effect and effectively reduces energy waste.

4, temperature circulation system adopts special air conditioning low noise long axis fan motor, high and low temperature resistance of stainless steel multi-wing impeller, to achieve the strength of convection vertical diffusion cycle. This design ensures the stability and reliability of the test machine at different temperatures and reduces operating noise.

5, the door and the box use a double layer of high temperature resistance stretched seal to ensure that the test area closed, effectively prevent heat loss and external interference.

1, cooling water flow is too small: check whether the size of the supporting installation of the pipe is consistent with the size of the refrigeration unit, or whether the water valve is opened to the maximum position.

2, the temperature is too high, the heat dissipation is not good: clean the copper pipe of the cooler, because the copper pipe of the cooler motor electronic control high and low temperature coolant test machine is scaly and small, which may lead to poor heat dissipation of the heat pipe. In addition, please check whether the refrigerator is used for a long time, resulting in the accumulation of impurities such as scale in the condenser copper pipe, affecting the refrigeration cycle system. In this case, regular maintenance and cleaning should be performed according to the manufacturer's recommended maintenance time.

3, too much refrigerant: in this case, it is necessary to reduce refrigerant.

4, motor electronic control high and low temperature coolant testing machine expansion valve open through large: moderately reduce the opening of the expansion valve.

1, heat dissipation mode:

· Air-cooled: Heat is transferred from the inside of the test machine to the outside through fans and radiators. The fan takes the heat away by circulating the air and dissipates the heat into the surrounding environment through the radiator.

Water cooled: Heat is transferred from the inside of the test machine to the outside through the water cooling system. Specifically, the water cooling test machine usually includes a water cooler and a set of water pipes. The heat is transferred to the water cooler through the water pipe, and then the heat is dissipated to the surrounding environment through the circulation of the cooling water.

2, heat dissipation effect:

The heat dissipation effect of air-cooled type is relatively poor, it takes longer to reduce the temperature inside the test machine, and it is usually noisy.

· Water-cooled heat dissipation effect is good, can quickly reduce the temperature inside the test machine, and less noise.

3, installation site requirements:

· The air-cooled heat dissipation mode has no high requirements on the site, and only needs ventilation. When the temperature is not high, the exhaust fan can dissipate heat.

· The water-cooled heat dissipation mode requires a wide field and water supply conditions, so there must be certain site requirements.

4. Applicable environment:

· Air-cooled type is more suitable for small high and low temperature test boxes, because small test boxes have less high requirements for refrigeration compressors, and air-cooled type is affordable and convenient to move. However, the air-cooled type has high requirements for the ambient temperature around the equipment, and is generally used in an environment of 5 to 28 degrees. Therefore, in areas with higher temperatures in the south, the cooling rate is often too low.

The water-cooled type is more suitable for large equipment or southern high temperature areas, because it can reduce the temperature inside the test machine more effectively. However, in the northern areas with low temperatures, the water-cooling method is easy to cause icing and affect the flow of water, so the use of air-cooled heat dissipation is better.

1, determine the location of ice blockage: First of all, you need to determine the location of ice blockage, you can judge the possible location of ice blockage by observing the pressure and temperature changes of the refrigeration system, combined with the operation of the equipment.

2, discharge of refrigerant: After determining the location of the ice blockage, it is necessary to discharge all the refrigerant in the system to avoid further damage to the system.

3, drying treatment: the use of heating vacuum and secondary vacuum method to remove the moisture of the components of the refrigeration system, and then put the components into the drying box for heating and drying to ensure that the system is completely dry.

4, replace the filter: If there is ice blockage in the filter, a new filter should be replaced to prevent ice blockage from happening again.

5, cleaning system: cleaning the entire refrigeration system, including condenser, evaporator and other components, to remove possible impurities and moisture.

6. Recharging refrigerant: After cleaning and drying, you need to recharge refrigerant and ensure that the amount of refrigerant is moderate.

7. Operation test: After completing the above steps, it is necessary to conduct operation test to observe the operation of the equipment and the refrigeration effect to ensure that the ice blockage problem has been completely solved.