Technology specification of one-stage semi-hermetic piston refrigeration compressor
One-stage semi-hermetic piston refrigeration compressors are widely used in different kinds of refrigeration system. The excellent performance, remarkable stability and long lifetime of one-stage semi-hermetic piston refrigeration compressor make it suitable for all kinds of small, medium and large refrigeration applications. This technology specification is to define the technical requirements for one-stage semi-hermetic piston refrigeration compressor and its components.
1. Types
One-stage semi-hermetic piston refrigeration compressors can be divided into horizontal type, vertical type and upright type. The difference between the three is the structure and installation position of the motor and compressor. Different types of one-stage semi-hermetic piston refrigeration compressors are suitable for different kinds of refrigerants with different interchangeability and different basic parameters.
2. Basic Parameters
2.1. Displacement Volume
The displacement volume of one-stage semi-hermetic piston refrigeration compressor shall be at room temperature and under a standard suction pressure of 95 kg/ cm² and a specific cooling capacity of 0.7 kW/m².
2.2 Rated Power Input
The rated power input shall be the measured value ofMotor according to the rated speed and basic parameters of the compressor.
2.3 Cooling Capacity
The cooling capacity of one-stage semi-hermetic piston refrigeration compressor shall correspond to the rated speed, the rated power input, and the specific cooling capacity under an atmospheric pressure of 95 kg/cm² and the economic and efficient operating mode.
2.4 Compression Ratio
The compression ratio of one-stage semi-hermetic piston refrigeration compressor shall correspond to the rated speed and basic parameters of the compressor, and the actual data shall be thoroughly tested.
3. Performance Parameters
The performance parameters of one-stage semi-hermetic piston refrigeration compressor can be divided into two parts: noise and efficiency.
3.1 Noise
The sound pressure level of one-stage semi-hermetic piston refrigeration compressor shall not exceed the allowable noise limit of the operating environment.
3.2 Efficiency
The efficiency of one-stage semi-hermetic piston refrigeration compressor shall be calculated according to the measured data of the rated speed, the ambient temperatures and the measured compressor power input with an accuracy of 0.5%.
4. Operating Requirements
4.1 Ambient Temperature
The ambient temperature of one-stage semi-hermetic piston refrigeration compressor shall be within the range of 0 to +45℃.
4.2 Humidity
The maximum relative humidity of the surrounding air of one-stage semi-hermetic piston refrigeration compressor shall not exceed 70% at +40℃ ambient temperature.
4.3 Operating Conditions
The operating pressure shall be within the range 20 kg/cm² and 95 kg/ cm² and the operating viscosity shall be within the range 0.015 Cp to 0.018 Cp.
5. Safety Devices
For the purpose of preventing over-temperatures and over-pressures, one-stage semi-hermetic piston refrigeration compressor shall be equipped with a complete set of safety devices (for example, pressure relief valves, pressure cut-outs, temperature cut-offs etc.).
6. Materials
The materials used for the components of one-stage semi-hermetic piston refrigeration compressor shall be of high-strength and long-lasting to make sure its good performance.
7. Quality Control and Acceptance
The suppliers of one-stage semi-hermetic piston refrigeration compressor shall conduct a strict quality control in accordance with GB/T 10875-89. After the inspection of the product, it shall be accepted by the purchaser.
In order to make sure the safe, reliable and high-efficiency operation of one-stage semi-hermetic piston refrigeration compressor, its suppliers are required to follow the provisions of this technology specification to guarantee its good performance and quality.
