Refrigerant compressor apparatus

Refrigerant compressor apparatus comprising:

• a drive motor,
• a compressor driven by the drive motor and having several cylinders arranged in a V shape,
• a compressor shaft bearing eccentrics for driving pistons operating in respective ones of said cylinders,
• the cylinders being arranged at a V angle of less than 360° divided by the number of cylinders,
• the compressor shaft being mounted with only two bearing sections thereof in corresponding compressor shaft bearings,
• the eccentrics being arranged between the bearing sections,
• a separate eccentric being provided for each piston and arranged at a distance from the other, separate eccentrics for the respectively other pistons,
• the separate eccentrics being separated from one another by intermediate elements having, in a direction of an axis of rotation, a length corresponding at least to a width of a piston rod,
• the intermediate elements having a cross-sectional shape extending, in a radial direction in relation to the axis of rotation, at the most as far as the closest one of two casing surfaces,
• one of said two casing surfaces being the casing surface of one of two consecutive eccentrics, and
• the other of said two casing surfaces being the casing surface of the other of the two consecutive eccentrics.

Refrigerant compressor apparatus comprising:

• a drive motor,
• a compressor driven by the drive motor and having several cylinders arranged in a V shape,
• a compressor shaft bearing eccentrics for driving pistons operating in respective ones of said cylinders,
• the cylinders being arranged at a V angle of less than 360° divided by the number of cylinders,
• the compressor shaft being mounted with only two bearing sections thereof in corresponding compressor shaft bearings,
• the eccentrics being arranged between the bearing sections,
• a separate eccentric being provided for each piston and arranged at a distance from the other, separate eccentrics for the respectively other pistons,
• each of the eccentrics being arranged in relation to the other eccentrics so as to be turned through an angle with respect to an axis of rotation of the compressor shaft.

Refrigerant compressor apparatus comprising:

• a drive motor,
• a compressor driven by the drive motor and having several cylinders arranged in a V shape,
• a compressor shaft bearing eccentrics for driving pistons operating in respective ones of said cylinders,
• the cylinders being arranged at a V angle of less than 360° divided by the number of cylinders,
• the compressor shaft being mounted with only two bearing sections thereof in corresponding compressor shaft bearings,
• the eccentrics being arranged between the bearing sections,
• a separate eccentric being provided for each piston and arranged at a distance from the other, separate eccentrics for the respectively other pistons,
• the eccentrics forming pairs arranged so as to follow one another in a direction of an axis of rotation of the compressor shaft, and the eccentrics forming a respective pair being arranged so as to be turned in relation to one another through an angle of 360° divided by the number of cylinders plus the V angle.

Refrigerant compressor apparatus comprising:

• a drive motor,
• a compressor driven by the drive motor and having several cylinders arranged in a V shape,
• a compressor shaft bearing eccentrics for driving pistons operating in respective ones of said cylinders,
• the cylinders being arranged at a V angle of less than 360° divided by the number of cylinders,
• the compressor having:
• a low pressure stage comprising at least one cylinder, and
• a high pressure stage comprising at least one cylinder,
• the sum of the cylinder volumes of the at least one cylinder of the low pressure stage being greater than the sum of the cylinder volumes of the at least one cylinder of the high pressure stage.

Refrigerant compressor apparatus comprising:

• a drive motor,
• a compressor driven by the drive motor and having several cylinders arranged in a V shape,
• a compressor shaft bearing eccentrics for driving pistons operating in respective ones of said cylinders,
• the cylinders being arranged at a V angle of less than 360° divided by the number of cylinders,
• the compressor having:
• a low pressure stage comprising at least one cylinder, and
• a high pressure stage comprising at least one cylinder,
• a capacity regulation valve being arranged on the suction side of the low:pressure stage, and
• a check valve being arranged between a low pressure connection of the compressor and a suction side of the high pressure stage,
• said check valve opening automatically when the capacity regulation valve is active as a function of the resulting difference in pressure.

Refrigerant compressor comprising:

• a drive motor,
• a compressor driven by the drive motor and having several cylinders arranged in a V shape,
• a compressor shaft bearing eccentrics for driving pistons operating in respective ones of said cylinders,
• the cylinders being arranged at a V angle of less than 360° divided by the number of cylinders,
• the compressor having:
• a low pressure stage comprising at least one cylinder, and
• a high pressure stage comprising at least one cylinder,
• refrigerant flowing from the low pressure stage to the high pressure stage also flows through said drive motor.

Refrigerant compressor apparatus comprising:

• a drive motor,
• a compressor driven by the drive motor and having several cylinders arranged in a V shape,
• a compressor shaft bearing eccentrics for driving pistons operating in respective ones of said cylinders,
• the cylinders being arranged at a V angle of less than 360° divided by the number of cylinders,
• said drive motor being provided with a converter for speed control,
• said converter being arranged on the drive motor, with electrical power components of said converter being thermally coupled to a housing of the drive motor.

Refrigerant compressor apparatus comprising:

• a drive motor,
• a compressor driven by the drive motor and having several cylinders arranged in a V shape,
• a compressor shaft bearing eccentrics for driving pistons operating in respective ones of said cylinders,
• the cylinders being arranged at a V angle of less than 360° divided by the number of cylinders,
• a liquid subcooler being arranged on a side of the compressor located opposite the drive motor.

Refrigerant compressor apparatus comprising:

• a drive motor,
• a compressor driven by the drive motor and having several cylinders arranged in a V shape,
• a compressor shaft bearing eccentrics for driving pistons operating in respective ones of said cylinders,
• the cylinders being arranged at a V angle of less than 360° divided by the number of cylinders,
• a liquid subcooler, said liquid subcooler vaporizing liquid refrigerant, and
• the vaporized refrigerant entering refrigerant flowing to a high pressure stage of the compressor.