Classification of piston compressors
1. According to the classification of working fluids used, there are generally two types of ammonia compressors and Freon compressors.
Classified by compression level, there are single-stage compression and two-level compression. A single-stage compressor means that the refrigerant vapor is compressed only once from low pressure to high pressure during compression. In the so-called two-stage compressor, the refrigerant vapor is compressed twice from low pressure to high pressure during compression.
2, according to the mode of action, there are single-acting compressors and double-acting compressors.
The refrigerant vapor is compressed only on one side of the piston, and the piston travels one stroke to the other, inhaling and exhausting each time. The double-acting compressor refrigerant vapor is compressed in the cylinders on both sides of the piston, and the piston travels back and forth for one stroke, sucking and exhausting twice. Therefore, for a cylinder of the same size, the suction of the double-acting compressor is larger than that of a single action. However, due to the complicated structure of the double-acting compressor, most of them are currently single-acting compressors.
3. According to the classification of refrigerant vapor in the cylinder, there are direct current and counter current. The so-called direct current means that the movement of the refrigerant vapor proceeds from the inhalation to the exhaust in the same direction, while the countercurrent type, the direction of movement of the refrigerant vapor is opposite when inhaling and exhausting. From the theoretical analysis, compared with the countercurrent type, the direct current performance is better because the steam has less change in temperature and specific volume in the cylinder. However, since the inlet valve of the direct-flow compressor needs to be mounted on the piston, the length and weight of the piston are relatively increased, so that the consumption of work is increased and the maintenance is troublesome. Therefore, most of the compressors currently produced are countercurrent.
4. According to the position of the center line of the cylinder, there are vertical compressors, horizontal compressors, V-type, W-type and S-type compressors. The vertical compressor cylinder centerline is in a vertical position and the horizontal compressor cylinder centerline is horizontal. V-type, W-type and S-type are high-speed, multi-cylinder, modern compressors, the speed is generally 960 ~ 1440 rev / min, the number of cylinders are mostly 2, 4, 6, 8 four, of which the letters represent the cylinder Arranged.
5, piston refrigeration compressor, according to its structural characteristics, can also be divided into open, semi-closed and fully enclosed three. Although the structure is different, there are many things in common between them, but their structural characteristics are different.
The structural refrigeration compressor is characterized in that the power input shaft of the compressor protrudes from the outside of the machine body, is coupled to the motor through a coupling or a pulley, and is sealed by a shaft sealing device at the extension. At present, ammonia compressors and large-capacity Freon compressors adopt this type of structure.
The structural characteristics of the semi-hermetic refrigeration compressor are: the compressor and the motor share a main shaft and are assembled together in the same casing, but the casing is detachable, and various working holes are opened thereon to be sealed by a cover plate.
The structural feature of the hermetic refrigeration compressor is that the compressor shares a main shaft with its drive motor, and the two are assembled in a welded molded enclosure. The compressor has compact structure, good sealing performance, convenient use, small vibration and low noise, and is widely used in small automatic refrigeration and air conditioning devices.
Dongguan Qingsheng Testing Equipment Co., Ltd. is a company specializing in the development, design and production of reliability and environmental testing equipment and various testing instruments. Our mission is to provide our customers with reliable environmental testing equipment and internationally relevant testing techniques. The customer industry covers the science and technology industries such as electrical and electronic, semiconductor, optoelectronics, telecommunications, aerospace, machinery, laboratories, and automobiles. From product development to after-sales service, each link takes the customer's point of view and needs-seeking as the starting point for thinking.
Dongguan Qingsheng Test Equipment Co., Ltd. after-sales service commitment:
1. One year warranty, lifetime service; 2. Free installation, commissioning and training at the buyer's site; 3. After receiving the equipment, the company will arrive at the on-site service within 8 hours in Guangdong Province; within 2 working days outside Guangdong Province, arrive at the scene. The user solves the problem. 4. Warranty period: If it is a normal operation, causing damage to a certain component, the supplier can replace a component for free. If serious quality problems occur within 3 months, our company can unconditionally change the new model of the same model. 5. After the warranty period: If it is a normal operation, a part or part is damaged and needs to be replaced, and only the cost is charged. 6. Can provide comprehensive technical training, provide timely and perfect after-sales service for equipment maintenance, spare parts supply and other aspects.
1. According to the classification of working fluids used, there are generally two types of ammonia compressors and Freon compressors.
Classified by compression level, there are single-stage compression and two-level compression. A single-stage compressor means that the refrigerant vapor is compressed only once from low pressure to high pressure during compression. In the so-called two-stage compressor, the refrigerant vapor is compressed twice from low pressure to high pressure during compression.
2, according to the mode of action, there are single-acting compressors and double-acting compressors.
The refrigerant vapor is compressed only on one side of the piston, and the piston travels one stroke to the other, inhaling and exhausting each time. The double-acting compressor refrigerant vapor is compressed in the cylinders on both sides of the piston, and the piston travels back and forth for one stroke, sucking and exhausting twice. Therefore, for a cylinder of the same size, the suction of the double-acting compressor is larger than that of a single action. However, due to the complicated structure of the double-acting compressor, most of them are currently single-acting compressors.
3. According to the classification of refrigerant vapor in the cylinder, there are direct current and counter current. The so-called direct current means that the movement of the refrigerant vapor proceeds from the inhalation to the exhaust in the same direction, while the countercurrent type, the direction of movement of the refrigerant vapor is opposite when inhaling and exhausting. From the theoretical analysis, compared with the countercurrent type, the direct current performance is better because the steam has less change in temperature and specific volume in the cylinder. However, since the inlet valve of the direct-flow compressor needs to be mounted on the piston, the length and weight of the piston are relatively increased, so that the consumption of work is increased and the maintenance is troublesome. Therefore, most of the compressors currently produced are countercurrent.
4. According to the position of the center line of the cylinder, there are vertical compressors, horizontal compressors, V-type, W-type and S-type compressors. The vertical compressor cylinder centerline is in a vertical position and the horizontal compressor cylinder centerline is horizontal. V-type, W-type and S-type are high-speed, multi-cylinder, modern compressors, the speed is generally 960 ~ 1440 rev / min, the number of cylinders are mostly 2, 4, 6, 8 four, of which the letters represent the cylinder Arranged.
5, piston refrigeration compressor, according to its structural characteristics, can also be divided into open, semi-closed and fully enclosed three. Although the structure is different, there are many things in common between them, but their structural characteristics are different.
The structural refrigeration compressor is characterized in that the power input shaft of the compressor protrudes from the outside of the machine body, is coupled to the motor through a coupling or a pulley, and is sealed by a shaft sealing device at the extension. At present, ammonia compressors and large-capacity Freon compressors adopt this type of structure.
The structural characteristics of the semi-hermetic refrigeration compressor are: the compressor and the motor share a main shaft and are assembled together in the same casing, but the casing is detachable, and various working holes are opened thereon to be sealed by a cover plate.
The structural feature of the hermetic refrigeration compressor is that the compressor shares a main shaft with its drive motor, and the two are assembled in a welded molded enclosure. The compressor has compact structure, good sealing performance, convenient use, small vibration and low noise, and is widely used in small automatic refrigeration and air conditioning devices.
Dongguan Qingsheng Testing Equipment Co., Ltd. is a company specializing in the development, design and production of reliability and environmental testing equipment and various testing instruments. Our mission is to provide our customers with reliable environmental testing equipment and internationally relevant testing techniques. The customer industry covers the science and technology industries such as electrical and electronic, semiconductor, optoelectronics, telecommunications, aerospace, machinery, laboratories, and automobiles. From product development to after-sales service, each link takes the customer's point of view and needs-seeking as the starting point for thinking.
Dongguan Qingsheng Test Equipment Co., Ltd. after-sales service commitment:
1. One year warranty, lifetime service; 2. Free installation, commissioning and training at the buyer's site; 3. After receiving the equipment, the company will arrive at the on-site service within 8 hours in Guangdong Province; within 2 working days outside Guangdong Province, arrive at the scene. The user solves the problem. 4. Warranty period: If it is a normal operation, causing damage to a certain component, the supplier can replace a component for free. If serious quality problems occur within 3 months, our company can unconditionally change the new model of the same model. 5. After the warranty period: If it is a normal operation, a part or part is damaged and needs to be replaced, and only the cost is charged. 6. Can provide comprehensive technical training, provide timely and perfect after-sales service for equipment maintenance, spare parts supply and other aspects.
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