- Contact：Mr. Song
- Phone：0086-13705113637
- Tell：0086-0515-88809180
- Fax：0086-0515-88809181
- E-mail：jsjckt@126.com
- Address：No. 18, Rongguang Road, National High-tech Park, Yancheng City, Jiangsu Province
1. High -pressure protection
High -pressure protection is to detect whether the pressure of the refrigerant in the system is normal. When the pressure exceeds the allowable range, the pressure switch moves, and the abnormal signal is passed to the high -pressure controller. After processing, the work of the refrigeration system will be stopped and the failure will be displayed.
2. Low -pressure protection
The low -pressure protection detection is the pressure recovery pressure in the system. The role is to prevent the system from being too low or without the operation of the refrigerant and damage the compressor. If the system leaks and has no refrigerant, forced operation will damage the compressor. At this time, the low -pressure protection can be reacted in time, the control system stops and displays faults, and the compressor and refrigeration system will be protected.
3. Oil pressure protection
To prevent devices that prevent the internal component of the bearing or other compressors due to the low lubricating oil pressure, the amount of oil in the compressor will be reduced or the oil will be severely damaged. Ensure important components for the safe operation of compressors.
4. Anti -frozen protection
If the evaporator is too dirty or frosty, at this time, the air -conditioning cannot be fully exchanged with the hot air outside, which causes the inner machine to freeze. The role of protecting the compressor.
5. Overheating protection
The motor that is well designed and running under prescribed conditions will not exceed the allowable value, but the motor runs under too high or low voltage, or when it runs at high temperature environments, the internal temperature of the motor exceeds the allowable value, starting frequently, starting frequently At this time, the temperature of the ambassador is too high due to the starting current.
6. High temperature temperature protection
Excessive exhaust temperature causes the cooling agent to decompose, the aging of the insulation material, the lubricating oil carbon, the damage of the air valve, and the capsules and drying filters can be blocked. The protection method is mainly to induced the exhaust temperature with the temperature controller. The thermostat should be placed near the exhaust port. When the exhaust temperature is too high, the thermostat moves and cuts the circuit.
7. Oil temperature protection
To prevent the temperature of lubricating oil too high and apply for the operation of the compressor, sometimes although the oil pressure is normal, it may be due to the high oil temperature and the decreased lubrication performance, resulting in the burning of friction components such as bearing tiles. Therefore control.
8. Cooling water broken water protection
If the cooling water of the compressor water sleeve is broken, the exhaust temperature of the compressor will increase, and the cylinder will deform in severe cases. Install a pair of electric connecting points on the water pipe road of the compressor cooling water cover. When the water flows over, the electric connection point is guided by the water. The relay sent a signal to make the compressor start or operate normally. If the water flow is interrupted, the relay power connection point is disconnected, and the compressor cannot start or stop the accident. However, there are often bubbles in the water flow, which can cause error movements, and the water set of water will not cause accidents immediately. Therefore, the relay should be delayed, generally delayed to 15-30s.
9. Case temperature protection
The temperature of the case will affect the life of the compressor. Excessive case temperature may be due to the insufficient heat exchanging capacity of the condenser, so the air volume or water volume of the condenser should be checked. Whether the water temperature is appropriate. Excessive heat; excessive inhalation temperature, the case is easy to overheat, in addition, the electric motor is overheating.
10. current protection
When the line occurs short circuit, one of the important features is that the current in the line increases sharply. This requires setting the corresponding current when the current flows over a budget value.
11. Overheating protection
The motor that is well designed and running under prescribed conditions will not exceed the allowable value, but the motor runs under too high or low voltage, or when it runs at high temperature environments, the internal temperature of the motor exceeds the allowable value, starting frequently, starting frequently At this time, the temperature of the ambassador is too high due to the starting current.
12. Late launch protection
The air -conditioning operation process will stop running for various reasons. At this time, the high and low pressure in the system will not balance immediately. If the compressor is started at this time, the start current may be caused by the pressure problem, and the air conditioner will be burned. Therefore, the current air-conditioner has a delayed startup protection, that is, after the compressor is stopped, it can be started again after 3-5 minutes.
13, phase -sequential protection
Phase order protection is a protective relay that can automatically recognize the sequence. Avoid some refrigeration compressors and other reflexes (three fire line sequences are connected) to the motor reversal due to the power supply phase sequence. Such as: the structure of the vortex compressor and the piston compressor is different. Because the inverter of the three -phase power supply can cause the compressor's inverter, it cannot be inverted. Therefore, it is necessary to install an anti -phase protector to prevent the cold water unit from reversing. When installing an anti -phase protector, the compressor can work at the right time. When the opposite phase occurs, it is necessary to change the two lines of the power to a positive phase.
14. Unbalanced protection
Phase imbalanced voltage will lead to three -phase imbalance current, which leads to a larger temperature rise -setting overload relay. In the largest phase of the current
15. Voltage protection
It is more common in the air -conditioning system. There is an excessive pressure protective board, and it can also achieve lack of phase protection. After the protection, there is a corresponding light emitting diode to light up.
Industrial air conditioning, chemical fiber industrial air conditioning, chemical fiber industry refrigeration, textile industrial air conditioning, dust-free workshop cooling, ventilation pipeline, cooling tower, freezer and other air conditioning units and accessories.
Jiangsu Jincheng Air Conditioning Engineering Co., Ltd. is a comprehensive manufacturer of special air-conditioning equipment design, production, installation, and commissioning of clean room, electricity, tobacco, civil air defense engineering, medical clean room, clean room, electricity, tobacco, civil air defense engineering, medical clean room. Mainly produce JCZK combined air conditioning unit, cooling tower, glass steel ventilated galvanized sheet pipe, stainless steel pipe, polyurethane ventilation pipe and air conditioning accessories, Jincheng air conditioner is wide, the type, the unique model, superior performance, and user Favused.
