摘要:
An automobile moves at a traveling speed in accordance with the position of an acceleration pedal (89). A compressor is driven by the engine (20) of the automobile. The discharge displacement of the compressor is adjusted by an external control procedure. When the position of the acceleration pedal (89) reaches a determining value, or above at which it is determined that engine power is needed for accelerating the vehicle, the compressor is controlled such that the discharge displacement decreases. The determining value is selected by a controller (80) in relation to the traveling speed detected by a speed sensor (87). The determining value increases as the speed increases.
摘要:
A variable displacement compressor has a crank chamber defined (15) in a housing. A drive shaft (16) is arranged in the housing. A piston (41) is accommodated in the cylinder bore. A swash plate (32) is connected to the piston to convert a rotation of the drive shaft (16). A retainer surface (63) is arranged in the housing and extends substantially perpendicular to the axis of the drive shaft (16). A restricting mechanism (65, 66, 67) is arranged between the swash plate (32) and the retainer surface (63). The restricting mechanism receives the swash plate (32) and restricts movement of the swash plate (32) when the inclination of the swash plate (32) decreases.
摘要:
A single-head swash-plate refrigerant compressor of fixed displacement type is disclosed which can prevent lock-up due to burning between the spherical seat surface of the pistons and the spherical surface of the shoes and prevent plastic deformation of the pistons. A lubrication layer 6b coated with tin by electroless plating is formed between the spherical seat surface 6a of the piston 6 and the spherical surface 8a of the shoe 8 in order to improve the slidability therebetween.
摘要:
An automobile moves at a traveling speed in accordance with the position of an acceleration pedal (89). A compressor is driven by the engine (20) of the automobile. The discharge displacement of the compressor is adjusted by an external control procedure. When the position of the acceleration pedal (89) reaches a determining value, or above at which it is determined that engine power is needed for accelerating the vehicle, the compressor is controlled such that the discharge displacement decreases. The determining value is selected by a controller (80) in relation to the traveling speed detected by a speed sensor (87). The determining value increases as the speed increases.
摘要:
A single-headed piston type swash-plate-operated refrigerant compressor is provided with a swash plate mounted on a rotatable drive shaft and having front and rear opposite surfaces, single headed pistons arranged on the rear side of the swash plate to reciprocate in respective cylinder bores, and front and rear shoes to be held in slide-contact with the peripheral parts of the front and rear surfaces of the swash plate to engage a tail end part of each of the single headed pistons with the swash plate in which the front and rear surfaces of the swash plate are provided with respective uppermost layers having physical surface properties different from one another. A front uppermost and a rear uppermost layer of the swash plate are formed of a sprayed coating of, for example, a copper-base material and the rear uppermost layer is coated by a solid lubricant layer containing a solid lubricant, such as molybdenum disulfide, at least in a part of the solid lubricant. The thickness of the solid lubricant layer is measured and controlled by using the surface of the front layer as a reference plane.
摘要:
A viscous fluid type heater includes a heating chamber (7) for holding viscous fluid and a rotor (14) located in the heating chamber (7). A holding chamber (19; 63) is located below the heating chamber (7) to communicate with the heating chamber (7). A plunger (35; 62), which is actuated by a solenoid (30; 50), is movable between a forward position for maximizing the volume of the holding chamber (19; 63) and a rearward position for minimizing the volume of the holding chamber (19; 63). When the plunger (35; 62) is at the forward position, viscous fluid is discharged from the heating chamber (7) to the holding chamber (19; 63). When the plunger (35; 62) is at the rearward position, viscous fluid is supplied from the holding chamber (19; 63) to the heating chamber (7). This allows the load of the heater to be removed or reinstated selectively. In an engine-driven vehicle, the engine (E) can thus started without being hindered by the heater.
摘要:
A variable displacement type swash plate compressor that prevents a drive shaft (6) from moving axially when the difference between a crank chamber pressure and a cylinder bore pressure becomes excessive. A hinge mechanism (13) has a support arm (14) extending from a lug plate (11) and a guide pin (15) extends from a swash plate (12). The head portion (15a) of the guide pin (15) fits in a guide hole (70) formed in the support arm (14). A cutaway surface (74) is formed in a part (73) of the support arm that defines the guide hole (70). The cutaway surface (74) forms a clearance (C2) in the hinge. The clearance (C2) permits the swash plate (12) to move without pulling the drive shaft (6).
摘要:
The circulation circuit used for an air-conditioning system for a vehicle. The circulation circuit is provided with a variable capacity type compressor, a condenser, a variable orifice device, an evaporator 4, and an accumulator 5 interposed between the evaporator 4 and the compressor 1. The accumulator 5 is used also as a silencer for preventing noise caused due to the self-excited vibration of the internal mechanism of the compressor. The variable orifice device is used as a pressure reducing device and is capable of varying the cross-sectional area of a restricted path provided therein in response to the temperature of the coolant passing through the restricted path. Therefore, it is possible to change the pressure reducing ability in accordance with the change of the flowing rate of the coolant.
摘要:
A lubricating mechanism for a piston type compressor in a refrigeration system. A cam plate (27) is mounted on a drive shaft (16) for integral rotation therewith in a crank chamber (22), which is defined in a casing (11, 12, 13; 51, 52, 13). Pistons (20) are coupled to the cam plate (27) and reciprocate in cylinder bores (20) extending parallel to the drive shaft (16). Each piston (21) compresses refrigerant gas containing lubricating oil mist and discharges the compressed refrigerant gas from the compressor during rotation of the cam plate (27). The refrigerant gas is supplied into the crank chamber (22) and is circulated in the casing (11, 12, 13; 51, 52, 13). The lubricating oil is supplied to various moving parts from a location near the drive shaft (16). An oil pan (37; 53) is provided outside and to the side of the casing (11, 12, 13; 51, 52, 13) for collecting lubricating oil. A recovering passage (38; 57) connects the oil pan (37; 53) with the crank chamber (22) to convey the lubricating oil from the crank chamber (22) to the oil pan (37; 53) for collection. A guide passage (39; 54) guides the lubricating oil collected in the oil pan (37; 53) to the location near the drive shaft (16) using gravitational force. By mounting the oil pan (37; 53) on the side of the casing (11, 12, 13; 51, 52, 13), the oil pan (37; 53) collects relatively less liquefied refrigerant and more oil, and thus improves lubrication of the compressor.
摘要:
A variable displacement type swash plate compressor that prevents a drive shaft (6) from moving axially when the difference between a crank chamber pressure and a cylinder bore pressure becomes excessive. A hinge mechanism (13) has a support arm (14) extending from a lug plate (11) and a guide pin (15) extends from a swash plate (12). The head portion (15a) of the guide pin (15) fits in a guide hole (70) formed in the support arm (14). A cutaway surface (74) is formed in a part (73) of the support arm that defines the guide hole (70). The cutaway surface (74) forms a clearance (C2) in the hinge. The clearance (C2) permits the swash plate (12) to move without pulling the drive shaft (6).