摘要:
A compressor has a swash plate tiltable between maximum and minimum inclining angles with respect to a plane perpendicular to an axis of a drive shaft according to a difference between pressures in a crank chamber and a suction chamber. An internal gas passage includes the crank chamber, the suction chamber and a discharge chamber. The internal gas passage is connected to an external circuit separately provided from the compressor. The rotation of the drive shaft is converted to a reciprocating movement of a piston to vary a capacity of a cylinder bore. The piston compresses a gas supplied from the external circuit to the internal gas passage and discharges the gas to the external circuit. A inhibiting apparatus inhibits the circulation of the gas through the internal gas passage and the external circuit when the swash plate is located between the minimum inclining angle and a first inclining angle. The first inclining angle is greater than the minimum inclining angle of the swash plate.
摘要:
A variable displacement compressor having a rotary shaft and a swash plate is described. The swash plate is mounted on the shaft and rotates integrally with the shaft. The swash plate tilts between a maximum inclined angle and a minimum inclined angle and is connected to a plurality of pistons. The inclined angle of the swash plate is altered by the difference between the pressure in a crank chamber and the pressure in a suction chamber. Each piston reciprocates inside a cylinder bore with a stroke determined by the inclined angle of the swash plate and compresses refrigerant gas, which includes oil mist. A spool is arranged adjacent to the swash plate on the shaft. On the shaft, a thrust bearing is provided between the swash plate and the spool, and a radial bearing is provided in the spool. The spool has an opening opposed to the swash plate. Grooves that allow the flow of refrigerant gas into the spool are formed at the opening in the walls of the spool.
摘要:
A compressor includes a rotary drive shaft having a first end and a second end, both the ends being rotatably supported by opposing walls of a crank chamber defined in a casing and a swash plate tiltably mounted on the drive shaft and operably coupled with a piston in a cylinder bore. A rotation of the drive shaft results in a reciprocating movement of the piston for compressing refrigerant gas in a cylinder bore. A rotary member is secured to the first end which extends outside the casing. the rotary member supplies a power to the drive shaft from a power supply. A support member, disposed between the rotary member and the first end, protrudes outward from the casing. A first bearing, disposed between the support member and the rotary member, receives a thrust load and a radial load acting on the rotary member when the rotary member rotates. A second bearing, disposed between the casing and the second end, receives the radial load acting on the rotary member when the rotary member rotates.
摘要:
A scroll type refrigerant compressor having an axial housing means defining a discharge chamber and a low pressure chamber around the discharge chamber, a stationary scroll , and a movable scroll. The movable scroll engages the stationary scroll and moves along a predetermined orbiting path respective to the stationary scroll. The stationary and movable scrolls define compression chambers therebetween. The stationary end plate of the stationary scroll includes a pair of relief ports for fluid communication between the compression chamber and the low pressure chamber. The compressor further comprises a valve plate in the form of a ring with a pair of valve ports. The valve plate is rotatable about the axis of the compressor between an open position where the valve port is aligned with the relief port to provide fluid communication between the compression chambers and the low pressure chamber and a closed position where the valve port separates the compression chamber from the low pressure chamber. An actuator for rotating the valve plate between the open position and the closed position in response to a refrigeration demand signal.
摘要:
In a housing, a rotor is secured to a drive shaft, and a sleeve is supported movably on the drive shaft. A rotary swash plate is tiltably supported on the sleeve and is coupled to the rotor. Coupled to the rotary swash plate are pistons which move in the respective bores. A refrigerant is supplied to each bore from a suction chamber, and the refrigerant compressed by each piston is discharged from the bores to a discharge chamber. A control valve controls the difference between the pressure in the suction chamber and the pressure in a crank chamber to change the inclination angle of the rotary swash plate, so that the discharge displacement of a compressor becomes variable. In the housing, a spool is slidably provided while enclosing the drive shaft. With the spool advancing into the crank chamber, (when the sleeve engages with the spool,) shifting of the rotary swash plate is restricted to the position that sets the discharge displacement of the discharge chamber to a predetermined restricted displacement. A gear pump which is driven interlocking with the drive shaft is provided in the housing. The discharge pressure of the gear pump is selectively supplied to the spool depending on the level of the discharge pressure of an evaporator. By retracting the spool from the crank chamber based on this pressure supply, the rotary swash plate is permitted to move to the position where the discharge displacement to the discharge chamber becomes zero.
摘要:
Lipid is determined quantitatively by treating a sample with a surfactant in an aqueous medium to obtain a liquid sample dispersion, then reacting the dispersion with a reagent containing cupric ion and bicinchoninic acid, and measuring a colored state developed by complex formation of bicinchoninic acid with cuprous ion formed from cupric ion in the presence of lipid. This method can be effectively applied to determination of amphiphilic lipid having a tendency of gathering in an aqueous medium. Further, two different species interfering with each other in quantitative determination thereof are determined respectively by conducting two different determination methods on the same sample followed by calculation using the values obtained.
摘要:
Disclosed is a compressor having a plate rotatable about an axis of a rotary shaft and a piston connected to the plate, wherein the plate causes the piston to reciprocate between a top dead center and a bottom dead center of its stroke in accordance with the rotation movement of the plate. A cam surface is provided with the plate for actuating the piston. A shoe engages with the plate for transmitting the rotation movement of the plate to the piston. A recess is formed on the piston for restricting rolling of the shoe on the plate for causing the shoe to slide on the plate to reduce the pressure caused by the contact between the cam surface and the shoe.
摘要:
An improved piston guiding mechanism for use in piston a type compressor is disclosed. The compressor includes a housing. A cylinder block having a bore is accommodated in the housing. A piston reciprocates within the cylinder bore. A refrigerant gas containing lubricant oil is sucked into the cylinder bore from outside, is compressed within the cylinder bore, and is discharged out of the compressor in accordance with reciprocating motion of the piston. A hollow section extends radially from the central portion to the peripheral surface of the piston, and opens to the peripheral surface. The hollow section moves between the interior of the housing and the cylinder bore in accordance with the reciprocating motion of the piston, and transfers the lubricant oil in the refrigerant gas from inside of the housing to the cylinder bore.
摘要:
A continuously variable capacity swash plate type refrigerant compressor having a cylinder block defining therein a plurality of front and rear cylinder bores arranged around an axis of rotation of a drive shaft supported in the cylinder block, front and rear refrigerant suction chambers in front and rear housings attached to the ends of the cylinder block, an angularly inclined swash plate mounted on the drive shaft to be integrally rotated therewith and to be pivotable about a pivoting center to change an angle of inclination thereof, double-headed pistons reciprocated in the front and rear cylinder bores by the rotation of the swash plate in such a manner that the top dead center of the pistons in the rear cylinder bores is constantly set at a fixed position, front and rear suction passageways to suck the refrigerant before compression into the front and rear suction chambers, and a suction reducer for reducing a suction of the refrigerant gas by the rear suction passageway during the small capacity operation of the compressor to thereby generate a pressure differential between the front and rear suction chamber and obtain a flow of the lubricant contained refrigerant gas from the front suction chamber toward the rear suction chamber, while lubricating movable elements at the front side of the compressor.
摘要:
A variable displacement vane compressor for an air conditioning system used in an automobile has a cylinder assembly having a bore in which a rotor (7) is received to form at least one crescent chamber (R1, R2) between the rotor (7) and the bore. The cooling capacity is adjusted in accordance with a cooling load of the air conditioning system by displacement of an annular plate member (21) for controlling the amount of refrigerant introduced into a crescent chamber (R1, R2). The annular plate member (7) is driven by a driving units (25, 25a, 26, 27, 28, S1, S2) in which a dynamic pressure balance between a first compartment (S1) to which a refrigerant gas under a discharging pressure is introduced, and of a second compartment (S2) to which an oil under a discharging pressure is introduced. A sealing means (35a, 36) for preventing the leakage of the refrigerant gas from the high pressure region including the first compartment (S1) to the low pressure region is provided between the annular plate member (21) and a front end wall member (4) and an pressurized oil is supplied to the sealing means (35a, 36) to enhance the sealing effect of the sealing means (35a, 36).