Abstract:
An air conditioner comprising an outdoor unit and an indoor unit provided with an indoor heat exchanger and an indoor expansion device, wherein the outdoor unit comprises a compressor for compressing a refrigerant, an outdoor heat exchanger for heat-exchanging a refrigerant, a four-way valve adjacently arranged to the compressor for circulating a refrigerant discharged from the compressor according to a heating cycle or a cooling cycle, and a refrigerant detouring path for detouring a refrigerant discharged from the outdoor heat exchanger to the compressor at the time of a defrosting operation, thereby performing the defrosting operation without stopping the heating cycle and thus preventing an indoor heating loss.
Abstract:
A refrigeration defrost system including at least one frosted evaporator having an evaporator refrigerant vapor line and an evaporator refrigerant liquid line, comprises a first compressor having a suction inlet line and a discharge outlet line each connected to a discharge manifold, the discharge outlet being connected to said evaporator refrigerant vapor line. A first pressure regulator valve disposed in a refrigerant bypass passageway between the discharge manifold and the suction inlet line, feeds refrigerant vapor, when a defrost cycle is required, from the discharge manifold into the suction inlet line. The refrigerant vapor is fed from the first compressor into the discharge outlet line and into the frosted evaporator through the evaporator refrigerant vapor line, thereby defrosting said frosted evaporator. Also disclosed is a method of defrosting a frosted evaporator using a single, dedicated defrost compressor.
Abstract:
First, a system for providing liquid refrigerant subcooling, subsequent to that subcooling accomplished by the primary condenser of an ice machine, by means of utilizing cold harvest and/or melt water discharge from said ice machine. Subcooling heat exchange to be accomplished by directing and controlling the flow of said harvest and/or melt water through some type of refrigerant to fluid heat exchanger, or by a passive heat sink method whereby the liquid refrigerant subcooler sits in a non-pumped open reservoir that overflows at each harvest cycle. This would provide greater refrigeration capacity to the ice machine system. Secondly, a system for providing hot gas discharge refrigerant precooling before said hot gas passes into the primary condenser of an ice machine, by means of utilizing the cold harvest and/or melt water discharge from said ice machine. Precooling heat exchange to be accomplished by directing and controlling the flow of said harvest and/or melt water through some type of refrigerant to fluid heat exchanger, or by a passive heat sink method whereby the hot gas discharge refrigerant precooler sits in a non-pumped open reservoir that overflows at each harvest cycle. This would provide lower power consumption, increased pumping efficiency of the compressor, decreased heat rejection to the ambient air surrounding the ice machine as well as improving the primary condensers performance. Next, a system that combines the first two systems described, that utilizes the cold harvest and/or melt water first in the subcooler, then reuses it in the precooler, for providing both the benefits of subcooling and precooling with the same harvest and/or melt water supply being used twice. Then, a system for providing inlet water precooling by utilizing excess refrigeration capacity provided by the subcooling to precool the inlet water supply to the ice machine. This would provide for increasing the ice machine's daily ice production capacity. Also, a system for providing ice storage bin chilling by utilizing excess refrigeration capacity provided by the subcooling to chill the ice storage chamber of the ice machine. This would provide for decreased ice loss to melting and would provide for retained ice quality. Finally, a system that would allow means to downsize the compressor size for an ice machine by taking into account the extra refrigeration capacity provided by the extra subcooling of the liquid refrigerant to the ice machine. This would provide for an ice capacity matched to the existing ice making plate as well as for reduction in power consumption per unit weight of ice produced.
Abstract:
In a heat pump apparatus having a refrigerating cycle including a compressor 1, a gas cooler 3, a pressure reducing device 5 and an evaporator 7 in which water can be heated by the gas cooler, the compressor 1 comprises a two-stage compression type compressor for leading all or a part of refrigerant compressed to an intermediate pressure at a first stage through a shell case 11 to a second stage, compressing the intermediate-pressure refrigerant to a high pressure at a second stage and discharging the high-pressure refrigerant, and there is equipped a defrosting circuit 33 for leading the intermediate-pressure refrigerant of the first stage of the compressor 1 to the evaporator 7 with bypassing the gas cooler 3 and the pressure reducing device 5.
Abstract:
A pressure accumulator device for vapor compressed air conditioning or refrigeration equipment, comprises: an accumulator with its one end connected to refrigerant pipe at high pressure side as compressor, and with the other end connected to an inlet pipe of a condenser; a flow-rate control unit provided at the outlet of said accumulator, or in the condenser tube of said condenser characterized in that high pressure is maintained for refrigerant at high pressure side. This invention also provides a waste heat re-use device, comprising a dipped type heat exchanger device, being disposed at high pressure side as compressor, and connected between compressor and condenser via refrigerant pipes; a container device, for storing heat transfer medium for heat exchange; a waste heat recycled tube, being able to combine with said container device in heat transfer relationship, which is disposed between low-pressure side and compressor, for the purpose of reducing the temperature of said heat transfer medium and in turn, of reducing the temperature of said high temperature superheated refrigerant vapor within said submersible heat dissipated tube, by the utilization of recycled low temperature saturated refrigerant.
Abstract:
Small sized air conditioner including a heat discharging part having a small sized compressor and condenser, a heat absorbing part having a small sized evaporator, a drain hose for transferring condensate from the evaporator to the heat discharging part, and a device for disposing of condensate fitted in the heat discharging part for vaporizing the condensate transferred through the drain hose by using a heat generated at the heat discharging part, thereby facilitating easy installation and movement.
Abstract:
A flushing composition containing a lubricant and a deposit removal component having a deposit removal effect which is especially useful for cleaning refrigeration systems by reducing or removing unwanted deposits in constricted areas in the refrigeration system.
Abstract:
A compact rooftop air conditioning unit for a vehicle, said unit having an evaporator coil located adjacent to a condenser coil. At least one cylindrical blower is mounted adjacent the evaporator coil and is arranged to provide conditioned supply air to the interior of the vehicle. An electric motor is used to turn the shaft of the blower and a condensate pump is secured to the shaft for pumping condensate generated by the evaporator coil back over the condenser coil. An electrically driven compressor is housed within the unit and is arranged so that no refrigerant lines pass outside of the unit. An inverter is also housed within the unit and provides a regulated input to the compressor and the evaporator and condenser drive motors.
Abstract:
A condensing unit which includes a base plate having first and second oppositely disposed major surfaces. The base plate may include flanges disposed along the outer periphery of the base plate. A compressor mechanism and a condensing coil are mounted to the first major surface which faces a first direction. The flanges may also extend in the first direction. The second major surface may be substantially free of projections and define a bearing surface for the condensing unit. The motor of the compressor may have a main shaft which extends substantially parallel to the first major surface. The compressor may be a rotary compressor. There may be a conduit in fluid communication with the compressor and condensing coil and define together therewith a fluid circuit. Valves rotatably mounted on brackets and in fluid communication with the fluid circuit and operably couplable to an evaporator circuit may also be provided.
Abstract:
There is provided a rotary compressor capable of preventing deterioration of performance following plug fixing carried out to prevent falling-off of a spring member. The rotary compressor comprises a cylinder constituting a rotary compression element, a roller engaged with an eccentric portion formed in a rotary shaft of an electric element, and eccentrically rotated in the cylinder, a vane abutted on the roller to divide an inside of the cylinder into a low pressure chamber side and a high pressure chamber side, a spring member for always pressing the vane to the roller side, a housing portion of the spring member, formed in the cylinder, and opened to the vane side and a hermetically sealed container side, a plug positioned in the hermetically sealed container side of the spring member, and inserted into the housing portion to fit into a gap, and an O ring attached around the plug to seal a part between the plug and the housing portion. In this case, a space between the cylinder and the hermetically sealed container is set smaller than a distance from the O ring to an end of the plug on the hermetically sealed container side.