摘要:
An electric compressor (201) includes: a compressor (203) configured to compress a refrigerant, the compressor (203) having a plurality of passage ports (207) delivering the refrigerant; an electric motor (205) configured to drive the compressor (203), the electric motor (205) having a plurality of stators (17) and an accommodation chamber (213) accommodating the plurality of stators (17); a partition wall (215) separating the compressor (203) and the an accommodation chamber (213) of the electric motor (205); and a plurality of refrigerant introducing/discharging passages (219) formed at the partition wall (215) wherein the respective refrigerant introducing/discharging passages (219) are located in a circumferential direction of the accommodation chamber (213), thereby the refrigerant being introduced into and discharged from stators (17) end in the electric motor (205) through the respective refrigerant introducing/discharging passages (219).
摘要:
Apparatus and methods are provided for cooling motors used to drive gas and air compressors. In particular, the cooling of hermetic and semi-hermetic motors is accomplished by a gas sweep using a gas source located in the low-pressure side of a gas compression circuit. The gas sweep is provided by the creation of a pressure reduction at the compressor inlet sufficient to draw uncompressed gas through a motor housing, across the motor, and out of the housing for return to the suction assembly. The pressure reduction is created by structure in the suction assembly, such as a nozzle and gap assembly, or alternatively a venturi, located upstream of the compressor inlet. Additional motor cooling can be provided by circulating liquid or another cooling fluid through a cooling jacket in the motor housing portion adjacent the motor.
摘要:
A power driven compressor system for vehicle includes: a housing, formed with a driving circuit accommodating room; a transmission set disposed in the housing and driven by electrical power to produce a rotating magnetic for rotating a transmission axle; a scroll set comprised of a static scroll and a orbiting scroll. The orbiting scroll is driven by the transmission axle to rotate eccentrically with respect to the static scroll. An Oldham ring is disposed between the orbiting scroll and the housing. The Oldham ring has a cross-like limiting part. A concave part corresponding to the limiting part is formed on the housing and the orbiting scroll to limit the motion of the orbiting scroll.
摘要:
A system includes a compressor having a shell housing a compression mechanism driven by an electric motor in an on state and not driven by the electric motor in an off state. The system also includes a variable frequency drive that drives the electric motor in the on state by varying a frequency of a voltage delivered to the electric motor and that supplies electric current to a stator of the electric motor in the off state to heat the compressor.
摘要:
A compressor (20) has an unloading slide valve (100). The valve has a valve element (102) having a range between a first condition and a second condition, the second condition being unloaded relative to the first condition. A piston (124) is in a cylinder (128) and mechanically coupled to the valve element. A control valve (40; 42) is coupled to a headspace (138) of the cylinder to selectively expose the headspace to a fluid source (144), pressure of fluid in the headspace producing a force on the piston and valve element in a direction from the second condition toward the first condition. The compressor includes means (190, 192; 210; 220) for relieving excess pressure in the headspace.
摘要:
A screw compressor comprising: a pair of male and female screw rotors; and an air-cooled heat exchanger, wherein the air-cooled heat exchanger is provided above a motor for driving the compressor body; wherein, with respect to a cooling wind for the air-cooled heat exchanger, the air-cooled heat exchanger is inclined to the upstream side; wherein the uppermost portion of a unit suction port for the air-cooled heat exchanger cooling winds is positioned below the uppermost portion of the air-cooled heat exchanger positioned at the uppermost portion; wherein the lowermost portion of the unit suction port for the air-cooled heat exchanger cooling wind is positioned below the lowermost portion of the air-cooled heat exchanger positioned at the lowermost portion; and wherein the cooling wind for the air-cooled heat exchanger is exhausted from a ceiling portion of the compressor unit. With this structure, it becomes possible to provide a compact screw compressor with less noise whose installation area can be reduced.
摘要:
In a scroll-type fluid machine (4), a refrigerant in a discharge chamber (80) is adjusted at prescribed discharge pressure by using a discharge valve (84), discharged from a scroll unit (52), and supplied to a refrigeration circuit (2), and the machine has a circulation path (7) for introducing the refrigerant in the discharge chamber from the refrigeration circuit toward a drive casing (22) while maintaining the refrigerant pressure, and an inlet path (93) formed in a compression casing (24) and leads the refrigerant in the circulation path to the rear side of a movable scroll (54) to make the led refrigerant counteract the refrigerant discharge pressure acting on the front side of the movable scroll.
摘要:
A multi-stage compressor is provided that reliably prevents liquid compression in a higher stage compression mechanism and also prevents compression efficiency degradation resulting from overheating of injection refrigerant and from the lubricating oil being raised up together with the injection refrigerant. An injection circuit is branched into a plurality of circuits. A first circuit thereof is communicatively connected to an inside space of a closed housing that is at the same side as the higher stage compression mechanism with respect to an electric motor, and a second circuit is communicatively connected to an inside space of the closed housing that is opposite from the higher stage compression mechanism with respect to the electric motor. The first circuit and the second circuit are provided with a switching mechanism for switching the injection circuit to the first circuit or the second circuit according to the dryness of the injection refrigerant.
摘要:
The invention relates to a water-injected screw compressor, comprising a compressor element (2) with a housing (7) which borders a compression chamber (8) in which two rotors (9, 10) are installed, which, by means of an axle ends (13, 14; 15, 16), are borne in the housing (7) by means of water-lubricated slide bearings (1), an electric motor (3) comprising a housing (18) which carries a stator (19) at the inside, which stator surrounds a rotor (21) with a rotor shaft (22). An axle end (13) of one of the rotors (9) is directly coupled to or forms one piece with the rotor shaft (22) of the motor (3), said rotor shaft being located in the prolongation of said axle end. The rotor shaft (22) of the motor (3) is borne in at least one water-lubricated slide bearing (23).
摘要:
An electric compressor (10) is equipped with a motor chamber (27) provided in a suction pressure region. The motor chamber (27) is adjacent to an inverter accommodation chamber (101) with a first housing (24) therebetween, and a cooling hole (130) extending from the motor chamber (27) toward the inverter accommodation chamber (101) is formed through the first housing (24). The cooling hole (130) is a through-hole passing through the first housing (24). A cooling medium in the motor chamber (27) flows into the cooling hole (130) and comes into contact with a heat transfer plate (110), thereby cooling the heat transfer plate (110) directly.