Abstract: It is an improvement of a package-type compressor that is used for the air compression, refrigerating and air conditioning The compressor is a double scroll compressor that a laps are formed on both sides of an end plate of orbiting scroll. A scroll compressor element is disposed above a motor and a dryer is disposed further above the scroll compressor element. A cooling fan is installed in the motor. A cooler that cools operation gas through the compressor element is disposed above the cooling fan. A partition plate defines a first flow passage for cooling the motor and the compressor element and a second flow passage for cooling the cooler. A first suction port sucking external air to the first and second flow passages is provided on a casing side wall locating in a direction extending from the motor shaft. A suction partitioning plate is attached to a casing sidewall opposite to the casing side wall having the first suction port. The second suction port is lower than the first suction port.

Abstract: A cooling fan is fitted to one of the shaft end portions of a double-end motor, and a pulley is fitted to the other end portion. A belt is passed around this pulley and a pulley fitted to a compressor element, and the compressor element is driven by this belt. The compressor element is disposed in such a manner as to be stacked up in an upward direction of the motor. An exhaust duct having a built-in cooler is also disposed in such a manner as to be stacked up above a cooling fan on the discharge side of the cooling fan. A main duct is formed on the suction side of the cooling fan and is interconnected in series with a cooling air outlet of the compressor element. These members described above are accommodated inside a casing. Therefore, two cooling air flow passages are defined on the right and left sides inside the casing.

Abstract: It is an improvement of a package-type compressor that is used for the air compression, refrigerating and air conditioning. The compressor is a double scroll compressor that a laps are formed on both sides of an end plate of orbiting scroll. A scroll compressor element is disposed above a motor and a dryer is disposed further above the scroll compressor element. A cooling fan is installed in the motor. A cooler that cools operation gas through the compressor element is disposed above the cooling fan. A partition plate defines a first flow passage for cooling the motor and the compressor element and a second flow passage for cooling the cooler. A first suction port sucking external air to the first and second flow passages is provided on a casing side wall locating in a direction extending from the motor shaft. A suction partitioning plate is attached to a casing side wall opposite to the casing side wall having the first suction port. The second suction port is lower than the first suction port.

Abstract: An oil-free scroll compressor used for compression of air or the like, comprises an orbiting scroll having a spiral-shaped lap or laps formed on one or both sides of an end plate, and a stationary scroll having a lap or laps adapted to mate with the orbiting scroll to define a compression chamber or chambers.Grooves are formed on tips of the respective scroll laps, and elastic tip seals are fitted into the grooves in order to prevent leakage of compressed gas from between the laps and the end plates. Those surfaces of the orbiting scroll and of the stationary scroll or scrolls, which define the compression chamber or chambers, are subjected to surface treatment in order to prevent seizure or the like caused by sliding of the tip seals and the laps. The stationary scroll or scrolls are subjected to an anodizing coating treatment while the orbiting scroll is subjected to Ni--P--B treatment.

Abstract: A double scroll compressor including an orbiting scroll having spiral wraps formed on both sides of an end plate includes two stationary scrolls, each having a wrap formed thereon to mesh with the corresponding one of the spirals to form a compressing flow passage. The power of a driver, such as a motor, is transmitted via pulleys to two crank shafts which are disposed to extend through the end plate of the orbiting scroll approximately symmetrically with respect to the end plate. The two crank shafts are synchronously rotationally driven by a timing belt disposed between the pulleys. While the crank shafts are making their rotary motions, the orbiting scroll makes its eccentric circular motion and a sucked gas is compressed between the orbiting scroll and the stationary scrolls. A multiplicity of cooling flow passages approximately perpendicular to a line which connects the axes of the crank shafts are formed to extend through the central portion of the end plate of the orbiting scroll.

Abstract: A scroll compressor includes a drive shaft and an auxiliary drive shaft which are rotatably supported by stationary scrolls, and an orbiting scroll rotatably supported on these drive shafts through cranks. A resilient member is provided on the crank so as to allow thermal expansion of the orbiting scroll in a direction, along which the drive shafts are lined. With this construction, a distance between bearings for the orbiting scroll and the stationary scrolls is adjusted in accordance with the thermal expansion, and therefore even when the thermal expansion occurs, a smooth motion of the scroll will not be affected.

Abstract: An end plate 3a of an orbiting scroll 3 of an oil-less scroll compressor is provided with cooling holes 7 passing from the periphery of the revolving scroll through the central portion thereof. Using a pressure difference of about 100 mmAq between the ends of the cooling holes 7, the scroll compressor's own intake air is passed through the cooling holes to directly cool the revolving scroll.

Abstract: A double scroll compressor includes left and right stationary scroll members 2, 3 which are located by knock pins 20. Setting of positions of the right stationary scroll member 3 and an orbiting scroll member 1 relative to each other is achieved by using knock pins 16 to 19. A crankshaft 4 and an auxiliary crankshaft 5 are drivingly coupled through a timing belt under such a condition that their cranks have been in synchronization with a position of their maximum radius.