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Class 62/222 - Of expansion valve or variable restrictor


Subclass of Class 62 - Refrigeration
Definition: Apparatus in which the device controlled is a valve or variable
No. of patents: 216
Last issue date: 05/29/2012


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NumberTitleIssue Date
8186171Method for controlling high-pressure in an intermittently supercritically operating refrigeration circuit
A method is provided for controlling an intermittently supercritically operating refrigeration circuit. A control valve (12) is controlled: (a) in the subcritical mode, so that a predetermined “subcritical pressure” ensuring a predetermined sub-cooling of...
05/29/2012
8171747Refrigeration device
A refrigeration device includes a compression mechanism, a radiator, a first expansion mechanism (15), a liquid receiver (16), a second expansion mechanism, an evaporator, a temperature detector, a first pressure storing unit (23a), and a...
05/08/2012
8151583Expansion valve control system and method for air conditioning apparatus
A vapor compression air conditioning system includes a motor operated expansion valve and control unit including sensors for determining the amount of superheat of the working fluid at or adjacent to the compressor inlet. Expansion valve position is adjusted to main...
04/10/2012
8109107Mixed-phase regulator
Disclosed is a method and device to efficiently regulate flow of refrigerant while maintaining a sealed chamber in systems providing stored thermal energy for use during peak electrical demand. A mixed-phase regulator replaces the thermostatic expansion valve used i...
02/07/2012
RE42908Vapor-compression-type refrigerating machine
The internal heat exchanger 7 is provided which exchanges heat between the refrigerant of low pressure and the refrigerant of high pressure, and the pre-load adjusting mechanism of the expansion valve 5 is abolished. Due to the above structure, the ref...
11/15/2011
8020394Air conditioner and control method thereof
Disclosed here is an air conditioner and the control method thereof comprising an outdoor unit having an outdoor heat exchanger for the heat exchanging of the outdoor air and refrigerant; at least one indoor unit corresponding to the outdoor unit and having indoor h...
09/20/2011
7987681Refrigerant fluid flow control device and method
A subcool flow control valve useful in a refrigerant system includes an enclosure having a fluid flow pathway for a controlled fluid between an inlet and an outlet. A thermally conductive flexible wall forms a sealed cavity within the enclosure for carrying a contro...
08/02/2011
7918098Air conditioning system
An air conditioning system can improve the cooling/heating performance of the system because the injection of refrigerant into the compressor is achieved. The air conditioning system can further improve the cooling/heating performance in a low temperature region by ...
04/05/2011
7913503Refrigerant expansion assembly with pressure relief
A refrigerant expansion assembly, and method of operation, for use in a vehicle air conditioning system is disclosed. The assembly has a main body including an orifice inlet port, an orifice outlet port, an orifice channel extending between the orifice inlet and out...
03/29/2011
7913502Expansion valve and method for its control
The invention relates to an expansion valve and a method for controlling an expansion valve, in which the opening and closing movement of the valve-closing element is adjusted as a function of the pressure difference which is present on the high-pressure side in an ...
03/29/2011
7913504Variable refrigerant expansion device with pressure relief
A refrigerant expansion assembly, and method of operation, for use in a vehicle air conditioning system is disclosed. An orifice channel connects an orifice inlet port to an orifice outlet port and includes a valve seat. A variable orifice assembly is mounted in the...
03/29/2011
7866175Flow control of refrigerant
The present invention concerns a cooling or heating apparatus including at least a 5 compressor (1), a condenser (2), an expansion apparatus (7), a vaporizer (9) and a space for liquid accumulation (10). The invention is cha...
01/11/2011
7793512Multiple self cleaning orifice thermal expansion device
A multiport expansion device for vapor compression refrigeration systems is provided having improved reliability by preventing orifice fouling by virtue of its mechanical design. Furthermore, multiple arrays of ports of two or more similar or differently sized port ...
09/14/2010
7775057Operational limit to avoid liquid refrigerant carryover
A refrigerant system comprising a compressor, a condenser, an electronic expansion valve, and an evaporator is controlled in a normal operating mode to meet moderate cooling loads; however, when the load approaches that which is sufficient to induce liquid refrigera...
08/17/2010
7707844Thermostatic expansion valve with bypass passage
A thermostatic expansion valve is provided comprising an inlet, an outlet, first and second flow paths through the valve, a first valve element in the first flow path between the inlet and outlet, and a movable diaphragm having a first side acted on by a first fluid...
05/04/2010
7698904Control device for refrigeration or air conditioning systems
The invention relates to a control unit for controlling the expansion valve of a refrigeration or air conditioning system, comprising a temperature sensor that is connected upstream of the expansion valve in the coolant circuit. If the control unit detects a decreas...
04/20/2010
7690212Mixed-phase regulator for managing coolant in a refrigerant based high efficiency energy storage and cooling system
Disclosed is a method and device to efficiently regulate flow of refrigerant while maintaining a sealed chamber in systems providing stored thermal energy for use during peak electrical demand. A mixed-phase regulator replaces the thermostatic expansion valve used i...
04/06/2010
7669432Evaporator pressure regulator control and diagnostics
A method includes cycling an electronic evaporator pressure regulator valve fluidly coupled to a refrigeration circuit to regulate flow through the electronic evaporator pressure regulator valve and sensing a current drawn by the electronic evaporator pressure regul...
03/02/2010
7665321Evaporation process control used in refrigeration
The invention relates to an evaporator control by use of an expansion valve and an internal heat exchanger IHE. The evaporator control is controlled after the start of the evaporation process and the temperature of the compressor suction vapor, oil and hot gas as we...
02/23/2010
7637115Expansion device for an air conditioning system
The invention relates to an expansion device for a refrigerant, in particular an expansion device to control the high-pressure level of an air conditioner. In accordance with the invention, it is provided that the expansion device (16) is a sliding seat valve...
12/29/2009
7637116Stepping motor valve for a refrigerator
A stepping motor valve is provided for a refrigerator. The stepping motor valve includes a catching part and a valve body provided at an outer rim portion and a central portion of a bottom surface of a rotator of a stepping motor, respectively. A valve housing and a...
12/29/2009
7594409Freezer apparatus
A refrigerator has a discharge three-way valve (8) for connecting the discharge side of a compressor (1) to at least either a hot water heat exchanger (3) or an air heat exchanger (6) and has a suction three-way valve (9) for conne...
09/29/2009
7487647Expansion valve and method for controlling it
The invention relates to an expansion valve and to a method for controlling an expansion valve, in which the opening and closing movement of the valve-closure member is set as a function of the pressure difference which is present in a feed opening on the high press...
02/10/2009
7484379Air conditioner
An air conditioner has an air conditioner casing in which air flows, an evaporator arranged in the air conditioner casing to cool air, an evaporator-side connector which protrudes from the evaporator toward an outer side of the air conditioner casing through an open...
02/03/2009
7481067Freezer
A refrigerant circuit R includes, a compressor 25 for compressing a refrigerant to a pressure higher than the critical pressure, a gas cooler 26, a motor-operated expansion valve 27, and an evaporator 28, and uses as a refrigerant a natur...
01/27/2009
7434419Pressure control valve for refrigeration cycle
A pressure control valve of a supercritical refrigeration cycle small in size and resistant to the effects of the outside air temperature, that is, a pressure control valve of a vapor compression type supercritical refrigeration cycle wherein a refrigerant is sealed...
10/14/2008
7415835Thermal control system and method
A system and method for controlling the temperature of a process tool uses the vaporizable characteristic of a refrigerant that is provided in direct heat exchange relation with the process tool. Pressurized refrigerant is provided as both condensed liquid and in ga...
08/26/2008
7389649Cooling system with variable duty cycle capacity control
A control system for a cooling system includes a first sensor for sensing a property indicative of demand for cooling and a controller coupled to the sensor. The controller produces the variable duty cycle control signal in response to the property and causes the co...
06/24/2008
7377126Refrigeration system
In a refrigeration system having a pressurizer, a condenser, an expansion device and an evaporator, with the evaporator having an inlet header, an outlet header, and a plurality of channels therebetween, the outlet header has a liquid outlet and a vapor outlet and p...
05/27/2008
7353659System and method for controlling an economizer circuit
A control algorithm for controlling an economizer circuit in a chiller system is provided. The control algorithm opens and closes a port valve in the economizer circuit in response to predetermined criteria to engage and disengage the economizer circuit. The predete...
04/08/2008
7353664Heat pump and compressor discharge pressure controlling apparatus for the same
Disclosed herein is a heat pump. The heat pump comprises a compressor, indoor and outdoor heat exchangers for condensing or evaporating refrigerant compressed by the compressor according to cooling or heating operation mode, a four-way valve for guiding the flow of ...
04/08/2008
7350366Heat pump
The present invention provides a heat pump including: a compressor; a radiator; a first throttling device having a variable opening; an expander; a second throttling device having a variable opening; an evaporator; piping that connects the compressor, the radiator, ...
04/01/2008
7337625Thermal control systems for process tools requiring operation over wide temperature ranges
A system and method for maintaining the temperature of a thermal transfer fluid at a selectable level within a wide temperature range, so as to operate a process tool in a chosen mode employing at lease two cascaded stages, each operating with a different fluid in a...
03/04/2008
7331196Refrigerating apparatus and refrigerator
In the case that heat absorbing means that function in selectively different temperature ranges, are provided in a refrigerating cycle, an object is to provide a refrigerating apparatus capable of suppressing the deterioration of efficiency in either temperature ran...
02/19/2008
7328592Circuit for the generation of cold or heat
A circuit for the generation of cold or heat comprising a compressor, an evaporator, a condenser and a restriction member made as a separate component and having a fixed throughflow cross-section, with the restriction member being inserted directly between two eleme...
02/12/2008
7316118Expansion valve
To provide an expansion valve having a low-pressure passage that is bent at right angles therein, which is reduced in untoward noise and noise of the flow of refrigerant generated when the refrigerant passes through the low-pressure passage. In an intersecting porti...
01/08/2008
7299995Expansion valve
The body of a valve has an orifice that internally connects a high-pressure passage through which a refrigerant flows in and a low-pressure passage through which the refrigerant flows out. The valve includes a valve plug for adjusting the flow rate of the refrigeran...
11/27/2007
7293428Refrigerating machine
A refrigerating machine comprising a compressor, a radiator, a pressure-reducing device, a gas-liquid separator, plural heat absorbers functioning selectively in different temperature zones, a unit for allowing introduction of gas refrigerant separated in the gas-li...
11/13/2007
7290599System for heating and cooling the interior of a motor vehicle
A system for heating and cooling the interior of a motor vehicle includes a first climate control device designed to heat or cool a front area of the interior, and a second climate control device designed to heat or cool a rear area of the interior. A first evaporat...
11/06/2007
7275391Assembly for refrigerant circuits
The invention relates to an assembly for refrigerant circuits that is arranged between the compressor and the evaporator thereof including a housing with a through channel. Within the through channel is a microchannel part having a filtering portion and a decompress...
10/02/2007
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