31results about How to "Reduce suction superheat" patented technology

An external heat exchanger is used to transfer heat from a compressor lubricant to an expanded working fluid, thereby cooling the lubricant. The heat exchanger may also be used to sub-cool condensed working fluid with the same flow of expanded working fluid. A horizontal scroll-type compressor includes an intermediate lubricant sump between a main bearing support and a scroll member. A counterweight on the crankshaft can travel through the lubricant in the intermediate sump to splash the lubricant around. A horizontal scroll-type compressor can include multiple machined surfaces that are utilized to precisely center and align components of the compressor.

The invention discloses a refrigeration device comprising the following structures: a compressor; an air source heat exchanger; a user side heat exchanger with a liquid refrigerant port connected with that of the air source heat exchanger, and a throttling gear is arranged between the liquid refrigerant ports of the user side heat exchanger and the air source heat exchanger; a gas-liquid separator used for separating gas from liquid; an ejector with a high pressure port, an ejection outlet, and a low pressure port, wherein the high pressure port is used for receiving high pressure liquid refrigerant or high pressure gas refrigerant, the ejection outlet is connected with the compressor, the low pressure port is connected with the gas-liquid separator, and a solenoid is arranged between the low pressure port and a bottom port. The refrigeration device can effectively solve the system energy efficiency reduction problems caused by controlling exhaust temperature, and can eliminate an exhaust temperature control blind zone.

The invention discloses an auxiliary compressor defrosting system for an air source heat pump and relates to an air source heat pump defrosting system. The invention aims at solving the problems of low indoor heat supply, long defrosting time and potential safety hazard of the compressor as a result of the fact that the compressor in the traditional air source heat pump defrosting system needs to simultaneously supply heat indoor and supply energy for defrosting. A liquid reservoir is communicated with a subcooler, a pipeline between the liquid reservoir and the subcooler is connected with an expansion valve in parallel, the subcooler is communicated with the inlet end of an auxiliary compressor, the auxiliary compressor is respectively communicated with a plurality of outdoor machines by a third electromagnetic valve, each outdoor machine is communicated with the liquid reservoir by a fourth electromagnetic valve, the remaining one of two outlet ends of the subcooler is communicated with the inlet end of a second throttling valve, the second throttling valve is connected with a second one-way valve in parallel, the second throttling valve is respectively communicated with a plurality of outdoor units, each outdoor unit is communicated with a four-way reversing valve, and the four-way reversing valve is communicated with a main compressor by a gas-liquid separator. The invention is used for defrosting an air source heat pump.

The invention relates to a scroll compressor (200). The scroll compressor comprises a shell (210), a rotating shaft (220), a motor (230), and a scroll mechanism (240) driven by the motor through the rotating shaft, wherein an oil pool (218) is defined in the shell. The scroll compressor further comprises cooling parts (250, 280, 290a) for cooling the oil pool; and the cooling parts allow cooling fluids from the external of the shell to flow through the cooling parts. The scroll compressor can improve the heat management thereof, reduces the inspiration superheat degree, and improves cooling on movable parts, in particular the motor.

The invention relates to the technical field of vehicle-mounted air conditioners, in particular to a high-efficiency vehicle-mounted air-conditioning system with a rapid step-cooling function. The high-efficiency vehicle-mounted air-conditioning system comprises a compressor, an oil separator, an outside-car condenser, an outside-car draught fan, a sub-cooler, a dry filter, an observation mirror, an electric liquid-level regulating valve, a liquid-level sensor, an in-car high-temperature-stage evaporator, an in-car low-temperature-stage evaporator, an in-car draught fan, a medium-pressure gas-liquid separator, an electronic expansion valve, an evaporating pressure regulating valve, a low-pressure gas-liquid separator and a connecting pipeline. According to the high-efficiency vehicle-mounted air-conditioning system with the rapid step-cooling function, the refrigerating capacity is large, cooling and dehumidification are rapid, and safe, reliable and high-efficiency operation can be achieved under a high-temperature operating condition; and so the high-efficiency vehicle-mounted air-conditioning system can be widely applied to all the sites adopting air-conditioners, such as automobiles, passenger cars or trucks.

The invention discloses an air suction and exhaust system structure of a piston type refrigeration compressor. The air suction and exhaust system structure comprises a connection rod, a piston pin, a piston, a crank case, a valve plate, an air exhaust valve sheet, an air exhaust limiter and an air cylinder cover. One end of the connection rod is connected with the piston. The piston is arranged in the crank case. The valve plate is provided with an air exhaust hole. The air exhaust valve sheet and the air exhaust limiter are arranged on the valve plate. The wall face of an air cylinder hole of the crank case is provided with an air suction hole. The distance from the forming position of the air suction hole to the end face of the crank case can be larger than 1/3 of the piston stroke and smaller than 1/2 of the piston stroke. Due to the fact that an air suction valve sheet which is the damageable key part in an existing piston type refrigeration compressor is omitted, the air suction hole is closed and opened through reciprocating motion of the piston so as to achieve the air suction function of the compressor, the cost of the compressor is reduced, the whole compressor noise of the compressor is greatly lowered, the thermodynamic efficiency of the compressor is further improved, and the reliability of the compressor is greatly improved.

The invention discloses an efficient scroll compressor. The scroll compressor comprises a chassis, a stator disk, a rotor disk, a crank shaft, an intake port and an exhaust port, wherein the stator disk is fixed on the chassis through fasteners, the eccentric part of the crank shaft is inserted in the hub of the rotor disk, the crank shaft is arranged in the chassis through a main bearing and a supplementary bearing, the scroll molded lines of the stator disk and rotor disk are meshed mutually to form a suction inner cavity near the vortex center and a suction outer cavity far away the vortex center; and the stator disk is also provided with the intake port communicated with the suction inner cavity and the suction outer cavity and the exhaust port communicated with the exhaust port, the molded lines of the stator disk and rotor disk are not symmetrical, and the openings of the suction inner cavity and suction outer cavity are both near the intake port. As the suction inner and outer chambers are both near the intake port, the suction space is fully utilized, the sizes of the stator disk and rotor disk are minimized, the volume of the compressor is reduced and the cost of the product is lowered.

The invention discloses a dual-system integrated multi-substance phase-change heat transfer compressor condensing unit, and belongs to the technical field of refrigeration equipment. According to the dual-system integrated multi-substance phase-change heat transfer compressor condensing unit, condensation waste heat discharged by a refrigeration compressor unit is utilized, heat energy of the condensation waste heat is used for absorption refrigeration work, after the refrigeration compressor unit absorbs heat of matter phase-change heat transfer of a lithium bromide absorption refrigeration system, the supercooling degree of a liquid refrigerant of the refrigeration compressor unit can be reduced, the enthalpy difference value of the refrigerant can be increased, and meanwhile, the suction superheat degree of a circulating refrigerant is reduced, the specific volume of a gaseous refrigerant is reduced, the refrigerant circulation amount of the refrigeration system is increased, and meanwhile the refrigeration efficiency of the refrigeration compressor unit is improved.