2026-04-09Views：
1. According to its principle, it can be divided into volume type compressor and speed type compressor. Volume type is divided into: reciprocating compressor, rotary compressor; speed type compressor is divided into: axial compressor, centrifugal compressor and mixed flow compressor.
Nowadays, household refrigerators and air conditioner compressors are volumetric, which can be divided into reciprocating and rotary. Reciprocating compressors use pistons, cranks, connecting rod mechanisms or pistons, cranks, and sliding tube mechanisms, and rotary compressors are mostly rolling rotor compressors. In commercial air conditioning, and more centrifugal, scroll, screw type.
2. According to the application scope, it can be divided into low back pressure type, middle back pressure type and high back pressure type. Low back pressure type (evaporation temperature -35 ~ -15 ℃ ) , generally used in household refrigerators, food freezers, etc. Medium back pressure type (evaporation temperature -20~0 ℃ ) , generally used in cold drink cabinets, milk refrigerators, etc. High back pressure type (evaporation temperature -5~15 ℃ ) , generally used in room air conditioners, dehumidifiers, heat pumps, etc.
Its working principle:
it is mainly used in the air compressor to adjust the start and stop state of the air compressor. By adjusting the pressure in the air tank, the air compressor can stop and rest, which has a maintenance effect on the machine. In the air compressor factory debugging, according to customer needs to adjust to the specified pressure, and then set a pressure difference.
For example, the compressor starts to pump air into the air storage tank. When the pressure reaches 10kg, the air compressor stops or unloads. When the pressure reaches 7kg, the air compressor starts to start again. There is a pressure difference between them. This process can give the compressor a rest to protect the air compressor.
The compressor is directly driven by the electric motor to make the crankshaft produce rotary motion, and drive the connecting rod to make the piston produce reciprocating motion, causing the cylinder volume to change. Due to the change of the pressure in the cylinder, the air enters the cylinder through the air filter through the intake valve.
In the compression stroke, due to the reduction of the cylinder volume, the compressed air passes through the exhaust valve, passes through the exhaust pipe, and enters the air storage tank through the one-way valve. When the exhaust pressure reaches the rated pressure of 0.7MPa, it is controlled by the pressure switch to automatically stop. When the pressure of the gas tank drops to 0.5-0.6MPa, the pressure switch is automatically connected and started.
The air pressure range of air compressors varies according to types and application scenarios. The common range is between 0.7MPa and 1.25MPa, which can be specifically divided into the following categories: 1. low-pressure air compressors are classified according to exhaust pressure: exhaust pressure ≤ 1.0MPa, which is suitable for occasions with low air pressure requirements, such as air pressure
The screw air compressor does not have to work all the time, but runs and stops according to actual needs. The following is a detailed explanation of the working status of the screw air compressor: Working principle and characteristics The screw air compressor is a positive displacement compressor, which is placed parallel to each other and mutually
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The maintenance cycle of the variable frequency air compressor is usually determined according to a number of factors, including the frequency of use of the equipment, the working environment, the operating time, and the specific maintenance manual or manufacturer's recommendations. The following is a general maintenance cycle guide: 1. Daily Maintenance
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The oil content of compressed air is converted from ppm (volume concentration) to mg/m & sup3;(mass concentration) needs to be combined with the density of oil and standard state conditions. the following is a detailed derivation and example: 1. the definition of core conversion logic ppm: in the field of compressed air, 1 ppm (volume) usually means every 1
Power plants have strict requirements on the oil content of compressed air, usually requiring an oil content of no more than 0.1 mg/m & sup3;(ISO 8573-1 Level 2) or lower, and some key systems even require ≤ 0.01 mg/m & sup3;(Level 1). Specific requirements due to system use and industry standards
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Q: Do you use air compressors in the food industry? A: You need to use air compressors. Valves and braking devices in automatic production lines for food fermentation, packaging, liquid transportation, bottle blowing, filling and bottling, transportation, blowing, ventilation, fermentation, cooling of powdered substances
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