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| Number | Title | Issue Date |
| 7270278 | Distributed intelligence control for commercial refrigeration A commercial refrigeration system including a compressor, a condenser, a valve, and an evaporator coil, all of which are in fluid communication. The refrigeration system further including a fixture adapted to be cooled by the evaporator coil, a system controller ope... | 09/18/2007 |
| 7234313 | HVAC monitor and superheat calculator system The present invention relates to a monitoring system for connection to an air conditioning system. The monitoring system includes a primary monitor for sensing the suction temperature and suction pressure of the air conditioning system along with the air conditionin... | 06/26/2007 |
| 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 including a variable valve and an expansion valve. The controller controls t... | 11/14/2006 |
| 7117736 | Flow sensor A flow sensor (1) is constituted by a substrate (4) having a front surface (4a) side facing a channel (3) for a measurement target fluid (2), and a channel forming member (5) and a plate (6) disposed oppositely... | 10/10/2006 |
| 7093614 | Solenoid valve for a coolant circuit A solenoid valve for a coolant circuit including a valve body having at least one inlet and at least one outlet for the coolant. A valve member is displaceable in the interior of the valve body between two switching positions for the solenoid valve. At least one out... | 08/22/2006 |
| 7082380 | Refrigeration monitor A refrigeration monitor and methodology are capable of detecting and recording data from selected sensors associated with monitored refrigeration equipment. The data are sampled periodically and stored as time series. Reference data are established and stored for no... | 07/25/2006 |
| 7069734 | Methods for detecting surge in centrifugal compressors A method and apparatus for detecting surge in a refrigeration system that includes a centrifugal compressor having an impeller and a compressor entrance, an evaporator that receives a fluid refrigerant, a suction line that flows the refrigerant from the evaporator t... | 07/04/2006 |
| 7036744 | Solenoid valve-equipped expansion valve The object of the present invention is to provide a solenoid valve-equipped expansion valve simplified in construction. A common valve element in which a valve element of an expansion valve and a valve element of a stop valve are integrally formed as a unitary membe... | 05/02/2006 |
| 6951117 | Vapor compression system and method for controlling conditions in ambient surroundings A vapor compression system (10) including an evaporator (16), a compressor (12), and a condenser (14) interconnected in a closed-loop system. In one embodiment, a multifunctional valve (18) is configured to receive a liquefied heat... | 10/04/2005 |
| 6941730 | Slicing and vacuum-packing assembly The invention relates to an operating and vacuum packaging machine comprising a handling or processing machine for the handling or processing of a product to be vacuum packed, and a vacuum packing unit designed to work sequentially with said operating machine. ... | 09/13/2005 |
| 6935126 | Refrigeration cycle system A refrigeration cycle for a vehicle air conditioning system allows the refrigerant-to-refrigerant heat exchanger to exchange heat between a high-pressure liquid refrigerant, which is delivered from the sub-cooling condenser and directed to the evaporator, and a low-... | 08/30/2005 |
| 6910341 | Temperature control apparatus and method of operating the same A temperature control unit and a method of operating a temperature control unit. The temperature control unit including a refrigeration circuit enclosing a refrigerant and having a compressor, a condenser, and an evaporator coil. The method including providing a fir... | 06/28/2005 |
| 6854285 | Controller and a method for controlling an expansion valve of a refrigeration system A controller for an expansion valve of a refrigeration system for cooling a medium is configured to include, in the generation of a control signal, a measure of the evaporation temperature (T0) of the refrigerant in an evaporator and a measure of a property o... | 02/15/2005 |
| 6786057 | Vehicle air conditioning device using a supercritical cycle An air conditioning unit including an expansion device (4) of the refrigerating fluid loop controlled to set the internal heat exchanger efficiency η, represented by the equation: η=TccTsc/TsrTsct, wherein: T... | 09/07/2004 |
| 6769264 | Control system of degree of superheat of air conditioner and control method thereof Disclosed herein is a system and method for controlling the degree of superheat of an air conditioner. The air conditioner includes a compressor controlled in a pulse width modulation manner according to duty control signals, a condenser, an electronic expansion val... | 08/03/2004 |
| 6330909 | Vehicle air conditioning system In a vehicle air-conditioning system, an evaporator is disposed in an air-conditioning case to form a bypass passage through which air bypasses the evaporator, and an opening degree of the bypass passage is adjusted by a bypass door. When a vehicle engine... | 12/18/2001 |
| 6260368 | Evaporator superheat stabilizer In a vapor compression refrigerator with closed loop feedback control of evaporator superheat, a superheat stabilizer consisting of a cavity connected between the evaporator outlet and the suction line inlet, the cavity combining the functions of liquid s... | 07/17/2001 |
| 6230506 | Heat pump cycle system A heat pump cycle system which can switches cooling operation and heating operation for a compartment includes a first inside heat exchanger and a second inside heat exchanger disposed in an air conditioning case. The first inside heat exchanger is dispos... | 05/15/2001 |
| 6109047 | Systems and methods for capacity regulation of refrigeration systems An arrangement is provided for insuring that excessive demand is not placed on a refrigeration unit that supplies pressurized subcooled refrigerant to different channels having independent needs for use of refrigeration capacity. A separate reference chan... | 08/29/2000 |
| 6079220 | Method of regulating the filling level of a refrigerant evaporator The invention concerns a method of monitoring, setting and regulating the filling level of a refrigerant evaporator using a throttle valve and a measuring apparatus mounted in the intake line, the measuring signal determined being freed from interfering p... | 06/27/2000 |
| 6062032 | Condensed water drain tray of air conditioner An air conditioner includes a housing including a front panel and a rear panel. A heat exchanger is disposed within the housing and includes a front portion disposed adjacent the front panel, and a rear portion disposed adjacent the rear panel. A lower dr... | 05/16/2000 |
| 6003325 | Air conditioner particularly suitable for vehicle and method of controlling the same An air conditioner increases a flow rate of a refrigerant to be sucked to a compressor so that a superheat of the refrigerant is reduced when a coil temperature of a driving motor for a compressor is more than a predetermined temperature.... | 12/21/1999 |
| 5987907 | Refrigerant circulating system A refrigerant circulation system of the present invention includes a compressor, a condenser, a evaporator, a throttle device and a control unit. The control unit controls a composition of a refrigerant circulating in the refrigerant circulation system ba... | 11/23/1999 |
| 5941084 | Control-information detecting apparatus for a refrigeration air-conditioner using a non-azeotrope refrigerant A control-information detecting apparatus for a refrigeration air-conditioner using a non-azeotrope refrigerant is equipped with a temperature detector and a pressure detector at the refrigerating cycle of the air-conditioner, which cycle is formed by con... | 08/24/1999 |
| 5916252 | Refrigerating or air-conditioning apparatus Disclosed is a refrigeration or air conditioning system comprising a refrigeration cycle that uses a refrigerant mixture of at least two kinds of refrigerants consisting of 45 to 55 weight percent of R32 and 55 to 45 weight percent of R125, and that inclu... | 06/29/1999 |
| 5904049 | Refrigeration expansion control A refrigeration system is disposed within a refrigerator having a freezer compartment and a refrigeration compartment. The refrigeration system includes an evaporator having an inlet and an outlet. A damper is positioned so as to direct air flow into the ... | 05/18/1999 |
| 5820262 | Smart refrigerant sensor A Refrigerant Sensor is provided that provides within a common assembly pressure, temperature and superheat measurements and calculations with respect to a refrigerant material. The Refrigerant Sensor includes a pressure transducer for measuring the press... | 10/13/1998 |
| 5771703 | Refrigeration control using fluctuating superheat The flow of refrigerant is controlled by a strategy that strives to seek and maintain a fluctuating superheat condition. The control system causes optimal use of the evaporator coil by ensuring that the refrigerant in the coil is in the liquid state. A te... | 06/30/1998 |
| 5615560 | Automotive air conditioner system An automotive air conditioning system comprises a heat pump type refrigerant circuit charged with a first refrigerant and includes first and second internal heat exchangers disposed within an air conditioning duct and an external heat exchanger located ou... | 04/01/1997 |
| 5546756 | Controlling an electrically actuated refrigerant expansion valve A control system for generating a pulse width modulated control signal for an electrically operated refrigerant valve. The controller receives inputs from evaporator inlet and outlet temperature sensors (Tin, Tout) and "fuzzy" logic ... | 08/20/1996 |
| 5533347 | Method of refrigeration case control A method of controlling a refrigeration case of a refrigeration system including the steps of locating an expansion valve of a refrigeration case, moving the expansion valve of the refrigeration case out of a predetermined position, sampling temperature r... | 07/09/1996 |
| 5502970 | Refrigeration control using fluctuating superheat The flow of refrigerant is controlled by a strategy that strives to seek and maintain a fluctuating superheat condition. The control system causes optimal use of the evaporator coil by ensuring that the refrigerant in the coil is in the liquid state. A te... | 04/02/1996 |
| 5423480 | Dual capacity thermal expansion valve This expansion valve (10) can be used for a refrigeration system (1) having a compressor (2), an evaporator (3) and a condenser (4). The valve (10) comprises a body (12) including an inlet passage (26), an outlet passage (38), a piston passage (28) defini... | 06/13/1995 |
| 5415008 | Refrigerant flow rate control based on suction line temperature Pulse width modulation is used to control the flow rate through a solenoid expansion valve in a refrigeration system. A device for sensing suction line temperature is provided, and a controller is included for controlling the duty cycle of the pulse width... | 05/16/1995 |
| 5396780 | Refrigeration system and method of controlling a refrigeration system A refrigeration system having a compressor, a condenser and an evaporator between the condenser and the compressor. A controllable valve unit at the input side of the evaporator has degrees of opening for controlling fluid flow through said evaporator. A ... | 03/14/1995 |
| 5355692 | Phase change location controller for a heat exchanger in a refrigeration system A refrigeration system, and method of operating same, with the refrigeration system having a refrigerant flow path which includes a heat exchanger having an inlet, an outlet, and a refrigerant flow path between the inlet and outlet. The refrigerant enters... | 10/18/1994 |
| 5277364 | Dual capacity thermal expansion valve This expansion valve (10 ) can be used for a refrigeration system (1) having a compressor (2), an evaporator (3) and a condenser (4). The valve (10) comprises a body (12) including an inlet passage (26), an outlet passage (38), a piston passage (28) defin... | 01/11/1994 |
| 5259210 | Refrigerating apparatus and method of controlling refrigerating apparatus in accordance with fuzzy reasoning A refrigerating apparatus which is capable of accurate and swift correspondence to a transient change of a refrigerant circuit or an accumulated deviation of the degree of superheat of a refrigerant, thereby releasing the state in which the liquid refrige... | 11/09/1993 |
| 5187944 | Variable superheat target strategy for controlling an electrically operated refrigerant expansion valve A method of controlling a refrigeration system employing an electronic controller for operating an electrically actuated refrigerant expansion valve supplying the evaporator or endothermic heat exchanger. The controller is of the type which modulates the ... | 02/23/1993 |
| 5157934 | Controller for electrically driven expansion valve of refrigerating cycle A valve controller which controls the opening degree of an electrically driven expansion valve mounted in the refrigerating cycle, in accordance with a difference between a refrigerant saturation temperature of an outdoor heat exchanger detected with a fi... | 10/27/1992 |
