Abstract: A rotation detecting apparatus disposed on the outer periphery of a compressor including an airtight casing containing a rotor. The rotation detecting apparatus is constituted by plural magnetism detecting elements attached to the outer periphery of the airtight casing of the compressor in correspondence with a rotational orbit of a magnet disposed on the rotor within the airtight casing, such plural magnetism detecting elements each having a core made up of at least one amorphous alloy wire and a coil wound around the outer periphery of the core.

Abstract: A swash plate compressor especially suited for automotive vehicles. The inner housing may be moved in the rear housing in the front and rear direction, as the occasion may demand, for adjusting the compression capacity or performance of the compressor. A partition wall is projectingly projected at the front side of the inner housing for defining an inner or discharge chamber and an outer or suction chamber. A plurality of clamp bolts for fixedly clamping together a rear cylinder block and the rear housing are passed through said suction chamber. The rear wall of the inner housing is formed with an annular thin-walled portion lesser in thickness than the valve plate on the front surface of said inner housing. By the function of said thin-walled portion, the inner housing may be flexed readily to absorb valve plate strain.

Abstract: A swash plate type compressor with a malfunction detector, the detector comprising a detected unit embedded in part of the outer periphery of the swash plate of the compressor and a detecting unit fixedly mounted on part of the combined cylinder block of the compressor. The detected unit has a thermosensor and a permanent magnet embedded inwardly from the thermosensor. The detecting unit has a fixed magnetic member and an electric coil wound around the magnetic member.

Abstract: An automobile air conditioner unit is provided with a compressor equipped with a number of compression chambers. At the start of air conditioner operation, less than all of these compression chambers are operated to avoid liquid compression. After start up, the number of compression chambers in operation will depend upon the air conditioning load, with a fewer number of chambers being operable at times when the load is low, as during temperature maintainance, as opposed to initial cool-down.

Abstract: An apparatus for controlling a driving force transmitted from a vehicle engine, via an electromagnetic clutch, to a compressor for a vehicle air conditioning equipment being provided with at least a sensor detecting the revolving rate of the compressor, and a clutch controller for providing a signal to disengage the electromagnetic clutch when the revolving rate of the compressor detected by the sensor is reduced below a prescribed reference revolving rate.

Abstract: A swash plate compressor especially suited for automotive vehicles. The inner housing may be moved in the rear housing in the front and rear direction, as the occasion may demand, for adjusting the compression capacity or performance of the compressor. A partition wall is projectingly projected at the front side of the inner housing for defining an inner or discharge chamber and an outer or suction chamber. A plurality of clamp bolts for fixedly clamping together a rear cylinder block and the rear housing are passed through said suction chamber. The rear wall of the inner housing is formed with an annular thin-walled portion lesser in thickness than the valve plate on the front surface of said inner housing. By the function of said thin-walled portion, the inner housing may be flexed readily to absorb valve plate strain.

Abstract: A multi-cylinder variable delivery compressor containing a plurality of compression chambers is adapted for use in compressing a refrigerant gas of a cooling circuit. The compressor has a first delivery chamber communicating with the compression chambers by way of a fixedly arranged delivery valve means and a second delivery chamber communicating with the compression chambers by way of a movably arranged delivery valve means.The movable delivery valve means is urged from its closing position toward its opening position, and is moved back to its closing position when a delivery pressure from the cooling circuit is applied to the movable delivery valve means.

Abstract: An operation control apparatus is provided of a compressor having a rotary shaft which is rotated by a driving apparatus by way of a clutch. The operation control apparatus comprises a recess or projection formed in or on one end surface of the rotary shaft as a portion-to-be-sensed offset from the axis thereof, an electromagnetic sensor disposed in facing relation with a locus described by the recess or projection according to the rotation of the rotary shaft, and a pulse monitoring circuit connected to the sensor. The sensor generates a periodic pulse signal in response to rotation of the rotary shaft. The pulse monitoring circuit generates a clutch release commanding signal to the clutch when it receives no pulse signal from the sensor for a predetermined time duration to protect the driving apparatus.

Abstract: A swash plate type compressor, in which there is incorporated a plurality of double-headed compressor pistons, each being formed with an axially central recess between two heads thereof. Inside the recess a generally outer part of the swash plate is arranged so as to establish an operative connection between each piston and the swash plate. The axially central recess has a bottom surface a part of which protrudes toward an outer surface of the swash plate. The protruding part serves to restrict a rotation of each piston about its own axis to a given small amount. The protruding part has an axial length determined so that when each compressor piston approaches one of the two compression dead centers, an outer edge of the swash plate comes away from the protruding part.

Abstract: A rotation sensor for sensing a swash-plate type compressor being in rotational state. An electromagnetic sensor including a permanent magnet and a coil disposed in the neighborhood thereof is fixed on a housing of the compressor such that it may be opposed to a part of a rotational locus described by a specific portion of the external periphery of the swash-plate. The electromagnetic sensor generates a signal pulse everytime the specific portion passes nearby. When the swash-plate is made of a non-magnetic material some magnetic body is fixed on the external periphery of the swash-plate for constituting a portion-to-be-sensed. This magnetic body may be a ring or lump of ferrous material, a temperature sensitive ferrite, a permanent magnet, etc.

Abstract: A round plate shape shoe for incorporation into a swash plate type compressor as an operative engaging element intervened between a rotatable swash plate and a reciprocal piston is structured to have a first flattened face slidably contacting the swash plate and a second face opposite to the first flattened face, the second face being formed with a recess for receiving a ball bearing, which has a spherical shape portion complementary with a part of the ball bearing and a round bore portion with a bottom. The spherical shape portion of the recess is concentric with the round bore portion.

Abstract: A protecting device for protecting a refrigerant compressor from overheating or seizure caused by a shortage of refrigerant by any chance such as leakage thereof. The device includes a temperature sensor disposed on the outer wall of the compressor casing in the vicinity of a refrigerant intake suction suction port for sensing the temperature of the outer wall to output the sensed or measured data and a discriminator for discriminating an occurrence of refrigerant shortage by an excess of the data over a predetermined condition for comparison. The signals from the discriminator cause a warning issuance of the refrigerant shortage or an automatic stoppage of the compressor operation.

Abstract: Shoes for operatively connecting a swash-plate with the compression pistons of a swash-plate type compressor are made from a novel Cu-based alloy. Improved shoes are characterized by a combination of high heat conductivity and excellent wear resistance properties particularly when subjected to a lubricating condition so severe that no lubricating oil is supplied to the surface of the shoes at the initial period of the compressor operation. At least three alloying elements are selected from Mn, Si, Pb, Sn, the IVb and VIb groups of the periodic table, and added in predetermined amounts to the Cu-based alloy, so that the properties mentioned above are simultaneously obtained. The compressor according to the present invention can be reliably employed, without the occurrence of seizure over a long operational period for air-conditioning vehicles, in which the sliding condition of the shoes is drastically varied with the rotation of the engine.

Abstract: Shoes for operatively connecting a swash-plate with the compression pistons of a swash-plate type compressor are made from a novel Cu-based alloy. Improved shoes are characterized by a combination of high heat conductivity and excellent wear resistance properties particularly when subjected to a lubricating condition so severe that no lubricating oil is supplied to the surface of the shoes at the initial period of the compressor operation. Phosphorus and elements of C group (Pb and/or Sn), as well as elements of A group (Mn and Si) and/or B group (the IVb and VIb groups of the periodic table), are added in predetermined amounts to the Cu-based alloy, so that the properties mentioned above are simultaneously obtained. The compressor according to the present invention can be reliably employed, without the occurrence of seizure over a long operational period for air-conditioning vehicles, in which the sliding condition of the shoes is drastically varied with the rotation of the engine.