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7607315 |
Pressure control valve and vapor-compression refrigerant cycle system using the same
A pressure control valve includes a valve portion disposed in a passage from a refrigerant radiator to a suction port of a refrigerant compressor in a vapor-compression refrigerant cycle system....
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RE40499 |
Pulsed flow for capacity control
Step control in capacity modulation of a refrigeration or air conditioning circuit is achieved by rapidly cycling a solenoid valve in the suction line, economizer circuit or in a bypass with the...
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7415836 |
Cooling apparatus and a thermostat with the apparatus installed therein
A cooling apparatus ( 1 ) has a compressor ( 2 ), a condenser ( 3 ), an expansion valve ( 5 ), an evaporator ( 6 ) and an electric valve ( 10 ), all connected to each other in this order by a...
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7287396 |
Evaporator pressure regulator control and diagnostics
An apparatus for refrigeration system control includes a plurality of circuits, each circuit having at least one refrigeration case and an electronic evaporator pressure regulator in communication...
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7207184 |
Method for regulating a most loaded circuit in a multi-circuit refrigeration system
A method for regulating a most loaded circuit of a refrigeration system is provided. Each circuit includes at least one case and an EEPR valve. At least one controller communicates with the EEPR...
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7197890 |
Valve for preventing unpowered reverse run at shutdown
An inventive method of preventing unpowered reverse rotation in a compressor includes the steps of placing a solenoid valve at a location near compressor discharge. The valve is preferably actuated...
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7134294 |
Method and apparatus for refrigeration system control having electronic evaporator pressure regulators
A method and apparatus for refrigeration system control includes a control system operable to meet cooling demand and control suction pressure for a plurality of refrigeration circuits each...
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6983618 |
Method and apparatus for refrigeration system control having electronic evaporator pressure regulators
A method and apparatus for refrigeration system control includes an evaporator pressure regulator and sensor in communication with one of a plurality of refrigeration circuits. The sensor is...
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6931867 |
Cooling system with isolation valve
A cooling system including a pulse-width modulated variable capacity compressor operable between on-cycles and off-cycles, and in electrical communication with the compressor and operable to...
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6877342 |
Controlled method for the energy-saving and energy-releasing refrigerating air conditioner
A controlled method for an energy-saving and energy-releasing air conditioning discloses the energy-saving and energy-releasing actions performed by the two adjoined heat exchangers of the storage...
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6854277 |
Quiet ice making apparatus
An ice cube-making machine that is characterized by noiseless operation at the location where ice cubes are dispensed and be lightweight packages for ease of installation. The ice cube-making...
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6804972 |
Direct drive multi-temperature special evaporators
A system and method for controlling the climate within a storage container including at least two cargo areas. The system includes one compressor, one condenser, and two evaporators. Each of the...
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6772599 |
Stability control system and method for compressors operating in parallel
A control system is provided to maintain stable operating conditions for centrifugal compressors operating in parallel when one of the centrifugal compressors enters into an unstable operating...
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6722145 |
High efficiency very-low temperature mixed refrigerant system with rapid cool down
The present invention is a refrigeration system that uses a nonflammable, nonchlorinated refrigerant mixture to achieve very-low temperatures using a single compressor. The system is characterized...
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6694762 |
Temperature-controlled parallel evaporators refrigeration system and method
A refrigeration system provides one or more compressors, a condenser, and a plurality of evaporator coils fed with the liquid refrigerant from the condenser. Each coil is disposed in a chamber to...
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6684658 |
Vapor-compression evaporative air conditioning systems and components
Novel vapor compression evaporative cooling systems which use water as a refrigerant are provided, as are methods for using same. Also provided are novel compressors, compressor components, and...
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6679072 |
Diagnostic system and method for a cooling system
A diagnostic system and method for a cooling system includes producing a control signal for adjusting a valve position of a regulator valve as a demand for cooling, as well as providing an ambient...
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6672079 |
Ice cream machine having an auxiliary evaporator tank
An ice cream machine for cooling liquid ice cream into frozen ice cream includes an evaporator having a cylindrical cooling tank and an auxiliary tank. The auxiliary tank ensures that the...
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6662583 |
Adaptive control for a cooling system
A method and controller for a refrigerant pressure effecting component of a cooling system includes providing closed loop control over a pressure effecting component based on an error signal,...
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6560981 |
Mixed refrigerant temperature control using a pressure regulating valve
A standard refrigeration pressure regulating valve limits the minimum temperature produced by a refrigeration process, which uses a refrigerant mixture including at least two components whose...
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6543241 |
Refrigerant feed device
The present invention increases the efficiency of a refrigerant system by the addition of a special device that provides a constant amount of steam-generated refrigerant pressure in the condenser...
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6543242 |
Generator power management
A system and method for monitoring and controlling an electrically driven transport refrigeration unit under varying operating conditions while maintain the system generator within its electric...
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6539734 |
Method and apparatus for detecting flooded start in compressor
When a flooded compressor in a refrigeration unit begins to run, refrigerant that has been absorbed into the oil is suddenly released, causing the crankcase to be filled with a sudsy mixture of...
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6530230 |
Accumulator module
When the first pressure reducing device 161 is fixed to the accumulator tank 140 and the internal heat exchanger 150 is housed in the accumulator tank 140 , the accumulator, the first...
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6499307 |
Refrigeration system incorporating simplified valve arrangement
A refrigeration system is provided having refrigerant flowing therethrough. The refrigeration system provides temperature and humidity cooling within a chamber. The refrigeration system includes a...
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6477851 |
Analysis gas-cooling device
The invention relates to an analysis gas-cooling device with a circuit for a cooling agent, which flows through a compressor, a liquefier, and an evaporator.
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6449970 |
Refrigeration apparatus and method for a fluid dispensing device
Preferred embodiments of the present invention have a nozzle assembly capable of controlling pressure of comestible fluid exiting the nozzle assembly, a refrigeration system in which refrigerant...
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6446450 |
Refrigeration system with liquid temperature control
An improved refrigeration system utilizing a subcooler/economizer is provided. The refrigeration system comprises a compressor, a condenser, a refrigeration case, and an evaporator for cooling the...
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6408635 |
Adaptive control for a refrigeration system using pulse width modulated duty cycle scroll compressor
A control for a refrigeration system serviced by a special pulse width modulated compressor coupled to a condenser and evaporator. The system can be of the distributed type wherein the condenser...
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6405550 |
Generator power management
A system and method for monitoring and controlling an electrically driven transport refrigeration unit under varying operating conditions while maintain the system generator within its electric...
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6367269 |
Electronic throttling valve diagnosis and preventative shutdown control
A method of controlling the operation of an electronic throttling valve in a temperature control unit having first and second pressure measurement devices. The method includes determining whether...
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RE37630 |
Refrigerated merchandiser with modular evaporator coils and EEPR control
An air cooling and control system for a refrigerated food merchandiser having an insulated cabinet with a product area having adjacent product zones, plural modular evaporator coil sections of...
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6357242 |
Control system and method for suppressing head pressure spikes in a vehicle air conditioning system
An improved system and method for suppressing high side pressure transients in a motor vehicle air conditioning system due to engine speed transients during vehicle acceleration through the use of...
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6357241 |
Method of controlling refrigerant cycle with sealed suction pressure sensor
An improved controlled algorithm for a refrigerant cycle monitors a suction pressure sensor to ensure the suction pressure sensor continues to operate. The controller utilizes a detected suction...
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6354092 |
Method and valve for arresting liquid at intake of refrigeration compressor
A liquid arresting valve for a refrigeration compressor having a refrigerant intake, including a housing having an inlet end to receive liquid and vapor phase refrigerant from an evaporator and an...
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6351959 |
Refrigerating cycle with a by-pass line
In a refrigerating cycle with a by-pass line 5 detouring the condenser 2 in an auxiliary heating mode the amount of circulated refrigerant is controlled in accordance with load, etc. so that...
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6351965 |
Cooling and heating cycle apparatus and refrigerant cycle apparatus
A cooling and heating cycle apparatus includes a high pressure coolant gas discharged from an outlet port of a compressor and supplied selectively to one end or the other of a heat exchanger...
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6318100 |
Integrated electronic refrigerant management system
A process and method for monitoring and selectively controlling the capacity and power demand within a transport unit is disclosed. Specifically, the present invention teaches the combined controls...
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6301911 |
Compressor operating envelope management
An process and method for monitoring and selectively controlling the discharge and suction pressures of a compressor within a transport unit is disclosed. Specifically, the present invention...
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6276154 |
Two step metering device
A two-step metering device for controlling the flow of an operating fluid to a variable capacity compressor is provided. The metering device includes a valve that defines a fluid flow path having a...
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6216477 |
Regulating device for air conditioner refrigerant circuit
A control device is provided for a refrigerant circuit of an air conditioner, divided by a compressor and a vent element into a high-pressure side and a low-pressure side. The control device...
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6202438 |
Compressor economizer circuit with check valve
An improved efficiency economizer system for compressors incorporates the use of a check valve blocking return flow into the economizer return line. The economizer return line communicates with an...
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6148632 |
Refrigeration cycle apparatus
A refrigeration cycle is switched from a refrigeration cycle circuit to a hot gas heater circuit to make the hot gas discharged from a compressor flow into an evaporator and heat the vehicle...
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6148627 |
High engine coolant temperature control
An system and method for monitoring and limiting high power and overheating engine conditions in a transport refrigeration unit is disclosed. The system provides a microprocessor control which...
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6138467 |
Steady state operation of a refrigeration system to achieve optimum capacity
A method of operating a refrigeration system in steady state operation drives the refrigerant system to the lowest capacity state which is still able to maintain operation within acceptable...
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6119473 |
Refrigeration-cycle apparatus for vehicle use
A motor vehicle air conditioner control system that maintains a target cooling vent temperature without sacrificing vehicle engine performance. When a vehicle air conditioning compressor increases...
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6112534 |
Refrigeration and heating cycle system and method
An Improved Refrigeration System and Heating/Defrost Cycle is disclosed. The system, for heating circulating air and defrosting an enclosed area, includes a refrigerant, an evaporator using said...
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6105380 |
Refrigerating system and method of operating the same
The present invention relates to a refrigerating system and a method of operating a refrigerating system. The refrigerating system includes a compressor, a gas cooler used as a heat-dissipation...
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6085533 |
Method and apparatus for torque control to regulate power requirement at start up
At start up, at least one bank of cylinders of a compressor is allowed to compress gas and deliver the compressed gas to the system while at least the majority of the other banks are subject to hot...
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6076368 |
Electrically operated fluid control device
A device for use in regulating the flow of a working fluid, such as a refrigerant, includes a body defining an axial opening, and a piston received within the axial opening. The piston is moveable...
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