The refrigeration system of the high and low temperature test chamber is composed of four parts: a refrigeration compressor, a condenser, a throttling element, and an evaporator. The refrigeration compressor is the power of the refrigeration cycle; the condenser uses the ambient cooling medium to carry away the heat of the high-temperature high-pressure refrigeration vapor from the cold compressor, and cools and condenses the high-temperature high-pressure refrigerant vapor into a high-pressure normal temperature refrigerant liquid. The throttling element is used for pressure reduction; the evaporator acts on heat exchange. Because of its importance, we must do daily maintenance work.
Maintenance measures for high and low temperature test chamber refrigeration system:
1. High and low temperature test chambers are recommended to be placed at a temperature of 8 ° C ~ 28 ° C, for laboratories not equipped with this condition, must be equipped with appropriate air conditioners.
2. Adhere to the professional management and maintenance of the special personnel. The qualified units must send special personnel to the supplier factory for training and learning to obtain professional maintenance and repair experience and ability.
3. Fix the condenser once every three months. For air-cooled cooling of the compressor, periodically clean the condenser fan and decontaminate and dedust the condenser to ensure good ventilation and heat transfer performance.
4. For the compressor to use water-cooled cooling, in addition to ensuring the inlet water pressure and inlet water temperature, the corresponding flow must be ensured, and the interior of the condenser should be cleaned and descaled regularly to obtain its continuous heat transfer performance.
5. The high and low temperature test chambers should be cleaned regularly, because the cleanliness grades of the samples are different. Under the forced air circulation, many small dust particles and other objects will be condensed on the evaporator, so it should be cleaned regularly.
6. To clean the waterway and humidifier, if the waterway is not smooth, the humidifier will cause the humidifier to dry and damage the humidifier, so the waterway and humidifier must be cleaned regularly.
7. It is necessary to insist that the temperature be set near the ambient temperature after each test, and then cut off the power for about 30 minutes, then wipe the inner wall of the working chamber. When the long-term shutdown is not used, the product should be energized every half month periodically, and the power-on time should not be less than 1 hour.
Fault analysis and judgment of high and low temperature test chamber:
Because the price of high and low temperature test chambers is basically composed of multiple systems of electricity, refrigeration and machinery. Therefore, once the equipment has problems, it is necessary to comprehensively inspect and comprehensively analyze the entire equipment system. In general, the process of analysis and judgment can be done first and foremost, namely:
After first excluding external factors, the fundamental failure phenomenon systematically decomposes the device. After the analysis and judgment of the system comprehensive, or the reverse method can also be used to find the cause of the fault. First, according to the electrical wiring diagram to find out whether there is a problem with the electrical system, and finally find out whether it is a problem of the refrigeration system, before you can find out the cause of the failure, you must not blindly disassemble or replace the parts, so as to avoid unnecessary trouble.
In summary, the maintenance of high and low temperature test chamber refrigeration systems requires professional tolerance, so it is best to have maintenance by trained personnel.
Maintenance measures for high and low temperature test chamber refrigeration system:
1. High and low temperature test chambers are recommended to be placed at a temperature of 8 ° C ~ 28 ° C, for laboratories not equipped with this condition, must be equipped with appropriate air conditioners.
2. Adhere to the professional management and maintenance of the special personnel. The qualified units must send special personnel to the supplier factory for training and learning to obtain professional maintenance and repair experience and ability.
3. Fix the condenser once every three months. For air-cooled cooling of the compressor, periodically clean the condenser fan and decontaminate and dedust the condenser to ensure good ventilation and heat transfer performance.
4. For the compressor to use water-cooled cooling, in addition to ensuring the inlet water pressure and inlet water temperature, the corresponding flow must be ensured, and the interior of the condenser should be cleaned and descaled regularly to obtain its continuous heat transfer performance.
5. The high and low temperature test chambers should be cleaned regularly, because the cleanliness grades of the samples are different. Under the forced air circulation, many small dust particles and other objects will be condensed on the evaporator, so it should be cleaned regularly.
6. To clean the waterway and humidifier, if the waterway is not smooth, the humidifier will cause the humidifier to dry and damage the humidifier, so the waterway and humidifier must be cleaned regularly.
7. It is necessary to insist that the temperature be set near the ambient temperature after each test, and then cut off the power for about 30 minutes, then wipe the inner wall of the working chamber. When the long-term shutdown is not used, the product should be energized every half month periodically, and the power-on time should not be less than 1 hour.
Fault analysis and judgment of high and low temperature test chamber:
Because the price of high and low temperature test chambers is basically composed of multiple systems of electricity, refrigeration and machinery. Therefore, once the equipment has problems, it is necessary to comprehensively inspect and comprehensively analyze the entire equipment system. In general, the process of analysis and judgment can be done first and foremost, namely:
After first excluding external factors, the fundamental failure phenomenon systematically decomposes the device. After the analysis and judgment of the system comprehensive, or the reverse method can also be used to find the cause of the fault. First, according to the electrical wiring diagram to find out whether there is a problem with the electrical system, and finally find out whether it is a problem of the refrigeration system, before you can find out the cause of the failure, you must not blindly disassemble or replace the parts, so as to avoid unnecessary trouble.
In summary, the maintenance of high and low temperature test chamber refrigeration systems requires professional tolerance, so it is best to have maintenance by trained personnel.
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