product description:
The low-temperature cooling circulating pump of this equipment adopts air-cooled fully enclosed compressor unit refrigeration and microcomputer intelligent control system. The low-temperature cooling liquid circulating pump provides low-temperature circulating cooling water (liquid) flow or low-temperature constant-temperature water (liquid) flow to meet the needs of cooling water and Low temperature liquid cooling or constant temperature equipment, such as rotary evaporator, fermentation tank, electron microscope, low temperature chemical reaction kettle, electron energy spectrometer, mass spectrometer, densitometer, freeze dryer, vacuum coating instrument, reaction kettle, etc.
Features:
The system structure is compact. Small footprint, high cooling and heating efficiency;
The large-size color touch screen can clean and display the real-time temperature changes of the Gongyi Project;
Circulating pumps and compressors can work continuously at low temperatures, control heat dissipation, and protect the system from damage;
The fan adopts a top-mounted design to meet more heat dissipation requirements;
The door and window type opening and closing design is more convenient and quick to maintain;
The circulating pump adopts a canned motor pump to solve the leakage problem of the circulating pump;
PRODUCT DETAIL:
1:The large size color touch screen can clearly display the real-time temperature change during the process engineering.
2:It is convenient and quick to maintain the equipment with the door and window type opening and closing design.
3:The overhead design of the fan can meet more heat dissipation requirements.
4:It is more accurate to judge the machine faults with the display of dual pressure gauges at high and low pressure ends of the compressor.
Refrigeration pump does not refrigerate troubleshooting:
First pay attention to whether the boot sequence is correct
Join the appropriate Lengjiezhi. Connect the power cord to the dedicated power supply. Close the circuit breaker. Click the "Power" button. ***Turn on the cycle switch*** Turn on the refrigeration switch. Turn on the cold storage device (the fifth and sixth are important)
Confirm that the refrigerant used is correct. In most cases, ethanol solution with a content of more than 97% is required (do not use automobile antifreeze as the refrigerant, as it will damage the life of the circulating pump if it takes a long time).
The filling of the refrigerant should be kept at the same level as the coil in the liquid storage tank, but not too much or too little (too little will affect the cooling effect of the refrigeration pump);
Confirm whether there is fluorine in the compressor: ≥30L There is a pressure gauge on the machine, you can directly see the value of the pressure gauge at this time, or directly take a photo and ask a professional to judge whether it is normal (under normal circumstances, the pressure gauge is at room temperature when the refrigeration pump is not started. It should be 8-0.9MPa in the state; if it is a dual compressor, the pressure gauge of the first-stage compressor should be 0.8-0.9MPa at room temperature, and the pressure gauge of the second-stage compressor should be 1.4-1.9MPa at room temperature); refrigeration The pressure gauge of the pump should be 0-0.25MPa in the normal starting state (the same is true for dual compressors);
If there is no fluorine deficiency in the compressor: when the refrigeration pump is stopped at room temperature, the compressor pressure gauge value is less than 6Mpa, it can be defined as fluorine deficiency, but the compressor pressure gauge value needs to be at least 0.2MPa (if the pressure is too low, it will foam water Compressor damage caused by sucking in the compressor). At this time, it is necessary to first detect whether there is a leak in the equipment. The specific method is as follows: apply soapy water, laundry detergent, detergent and other easily foaming liquids to the welding place of the copper pipe inside the compressor to observe whether there are bubbles at this time. If bubbles appear, it means that there is a leak in the pipeline and need to be repaired by professionals; after the repair, fill in according to the refrigerant type and filling method provided by our company, and then restart the machine.
It should be noted that it is forbidden to add any refrigerant to the cold storage device when the temperature of the refrigerant is reduced to the set value by the refrigeration pump.
The condenser needs to be cleaned when the refrigeration pump is slow or poorly refrigerated (clean the condenser of the refrigeration pump at least once a week to prevent clogging to prevent the refrigeration pump from being blocked by the condenser and causing the heat to be unable to remove the compressor and causing the compressor to burn)
Precautions for use:
1. Check whether the inlet and outlet valves of the refrigeration equipment are normally opened and the pressure is within the normal range.
2. Check whether the power of each device is in the on position.
3. Before using the low-temperature coolant circulation pump, add ethanol with a refrigerant concentration of ≥97% to the tank, and the liquid level of the medium should not pass the refrigeration coil in the tank.
4. Check the power supply: the power of the power supply should be greater than the total power of the instrument, and the power supply must have a good "grounding" device;
5. The equipment should be placed in a dry and ventilated place, with no obstacles within 500mm around the instrument;
6. Pay attention to the position of the liquid level in the tank. When the liquid level is too low, add refrigerant medium in time
7. When the equipment is working, the temperature of the inlet and outlet pipes is relatively high, so be careful not to touch them to prevent frostbite;
8. After use, all switches are turned off and the power supply is cut off;
9. Clean the condenser regularly to avoid the reduction of product efficiency due to excessive dust;
Precautions for use:
1. Check whether the inlet and outlet valves of the refrigeration equipment are normally opened and the pressure is within the normal range.
2. Check whether the power of each device is in the on position.
3. Before using the low-temperature coolant circulation pump, add ethanol with a refrigerant concentration of ≥97% to the tank, and the liquid level of the medium should not pass the refrigeration coil in the tank.
4. Check the power supply: the power of the power supply should be greater than the total power of the instrument, and the power supply must have a good "grounding" device;
5. The equipment should be placed in a dry and ventilated place, with no obstacles within 500mm around the instrument;
6. Pay attention to the position of the liquid level in the tank. When the liquid level is too low, add refrigerant medium in time
7. When the equipment is working, the temperature of the inlet and outlet pipes is relatively high, so be careful not to touch them to prevent frostbite;
8. After use, all switches are turned off and the power supply is cut off;
9. Clean the condenser regularly to avoid the reduction of product efficiency due to excessive dust;
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