Patents Assigned to Zhejiang Dunan Hetian Metal Co., Ltd.
-
Patent number: 9772235Abstract: A method of sensing superheat includes the steps of: (a) connecting a fluid inlet member of a superheat sensor to one of a plurality of fluid systems; (b) allowing fluid to flow from the fluid system to which the superheat sensor is connected to the superheat sensor; (c) sensing a temperature of the fluid in the fluid system with one of an internal temperature sensor mounted within a housing of the superheat sensor and an external temperature sensor mounted outside of the housing of the superheat sensor; and (d) calculating a superheat of the fluid in the fluid system.Type: GrantFiled: December 30, 2014Date of Patent: September 26, 2017Assignee: Zhejiang DunAn Hetian Metal Co., Ltd.Inventors: Parthiban Arunasalam, Wayne C. Long
-
Patent number: 9714780Abstract: A refrigeration system includes a compressor, a condenser fluidly connected to the compressor, an evaporator fluidly connected to the condenser and the compressor, such that fluid may flow from the compressor through the condenser, through the evaporator, and again through the compressor. An expansion device is fluidly connected between the condenser and the evaporator, and a micro-expansion valve is also connected between the condenser and the evaporator.Type: GrantFiled: June 24, 2014Date of Patent: July 25, 2017Assignee: ZHEJIANG DUNAN HETIAN METAL CO., LTD.Inventors: Edward Nelson Fuller, Parthiban Arunasalam
-
Patent number: 9404815Abstract: A superheat sensor includes a housing, a pressure sensor mounted within the housing, and a processor. A fluid passageway connects the pressure sensor to a source of superheat fluid. An external temperature sensor is located outside the housing of the superheat sensor and is electrically connected to the processor. The external temperature sensor is also electronically connected to a component of a fluid system to which the superheat sensor is attached and is configured to provide one of an internal temperature of the component, an external temperature of the component, and a temperature of fluid in the component.Type: GrantFiled: September 15, 2015Date of Patent: August 2, 2016Assignee: Zhejiang Dunan Hetian Metal Co., LTD.Inventors: Parthiban Arunasalam, Wayne C. Long
-
Patent number: 9328850Abstract: A microvalve includes a base plate having a surface defining an actuator cavity. A venting groove extends from a first cavity portion of the actuator cavity having a dead end region to a second cavity portion of the actuator cavity having a structure that can vent air from the microvalve. A cover plate includes a surface having an actuator cavity provided therein that includes a first cavity portion having a dead end region and a second cavity portion having a structure that can vent air from the microvalve. An intermediate plate includes a displaceable member that is disposed within the actuator cavity for movement between a closed position, wherein the displaceable member prevents fluid communication through the microvalve, and an opened position, wherein the displaceable member does not prevent fluid communication through the microvalve.Type: GrantFiled: June 24, 2014Date of Patent: May 3, 2016Assignee: Zhejiang DunAn Hetian Metal Co., LTD.Inventors: Edward Nelson Fuller, Parthiban Arunasalam, Chen Yang, Mark Luckevich, Joe Ojeda
-
Patent number: 9328832Abstract: A device is disclosed that may include a spool valve having a first connector and a second connector and a spool movable for controlling flow between the first connector and the second connector, regardless of direction of flow through the spool valve. A pilot valve having an inlet and an outlet develops a command pressure. A feedback circuit having an inlet and an outlet develops a feedback pressure. The spool valve may be responsive to the command pressure and the feedback pressure. A fluid rectifier circuit is provided to connect the higher pressure of the first connector and second connector to the pilot valve inlet and feedback circuit inlet, and connect the other of the first connector and second connector to the pilot valve outlet and feedback circuit outlet.Type: GrantFiled: December 20, 2013Date of Patent: May 3, 2016Assignee: Zhejiang DunAn Hetian Metal Co., LTD.Inventors: Edward Nelson Fuller, Parthiban Arunasalam
-
Patent number: 9235219Abstract: A system for controlling the flow of a fluid from a source to a load includes a source. An on/off type of control valve communicates with the source. A micro-electric mechanical system communicates with the on/off type of control valve. A consuming device communicates with the micro-electric mechanical system. An electronic controller that communicates with the consuming device and the source. The electronic controller measures a change in a parameter of the micro-electric mechanical system that results from the flow of fluid through the micro-electric mechanical system to sense a flow of fluid through a micro-electric mechanical system.Type: GrantFiled: December 19, 2013Date of Patent: January 12, 2016Assignee: Zhejiang Dunan Hetian Metal Co., Ltd.Inventors: Parthiban Arunasalam, Arvind Rao
-
Publication number: 20160003691Abstract: A superheat sensor includes a housing, a pressure sensor mounted within the housing, and a processor. A fluid passageway connects the pressure sensor to a source of superheat fluid. An external temperature sensor is located outside the housing of the superheat sensor and is electrically connected to the processor. The external temperature sensor is also electronically connected to a component of a fluid system to which the superheat sensor is attached and is configured to provide one of an internal temperature of the component, an external temperature of the component, and a temperature of fluid in the component.Type: ApplicationFiled: September 15, 2015Publication date: January 7, 2016Applicant: ZHEJIANG DUNAN HETIAN METAL CO., LTD.Inventors: Parthiban Arunasalam, Wayne C. Long
-
Publication number: 20150354875Abstract: A refrigeration system includes a compressor, a condenser fluidly connected to the compressor, an evaporator fluidly connected to the condenser and the compressor, such that fluid may flow from the compressor through the condenser, through the evaporator, and again through the compressor. An expansion device is fluidly connected between the condenser and the evaporator, and a micro-expansion valve is also connected between the condenser and the evaporator.Type: ApplicationFiled: June 24, 2014Publication date: December 10, 2015Applicant: ZHEJIANG DUNAN HETIAN METAL CO., LTD.Inventors: Edward Nelson FULLER, Parthiban ARUNASALAM
-
Patent number: 9188375Abstract: An arrangement includes a housing defining a first and second ports. A first passageway provides communication between the ports; a second passageway provides communication with the first port. An element is disposed in the housing and positioned by a balance of forces, the element is positionable to throttled positions for controlling flow through the first passageway in a first direction and to an open position to permit unrestricted flow in a second direction. A check valve is disposed in the second passageway for preventing flow therein from the first port when pressure in the first port is greater than pressure in the second port, and permitting flow through the second passageway to the first port when pressure in the first port is less than the pressure in the second port thereby affecting the balance of forces acting on the element so the element is urged toward the fully open position.Type: GrantFiled: December 4, 2013Date of Patent: November 17, 2015Assignee: ZHEJIANG DUNAN HETIAN METAL CO., LTD.Inventors: Gengxun Kara Gurley, Edward Nelson Fuller, Parthiban Arunasalam
-
Patent number: 9140613Abstract: A superheat sensor includes a housing, a pressure sensor mounted within the housing, a temperature sensor that is integrated to the pressure sensor, and/or is external to the pressure sensor, a fluid passageway connecting the pressure sensor to a source of superheat fluid, and a processor.Type: GrantFiled: July 31, 2012Date of Patent: September 22, 2015Assignee: Zhejiang DunAn Hetian Metal Co., Ltd.Inventors: Parthiban Arunasalam, Wayne C Long
-
Publication number: 20150153081Abstract: An arrangement includes a housing defining a first and second ports. A first passageway provides communication between the ports; a second passageway provides communication with the first port. An element is disposed in the housing and positioned by a balance of forces, the element is positionable to throttled positions for controlling flow through the first passageway in a first direction and to an open position to permit unrestricted flow in a second direction. A check valve is disposed in the second passageway for preventing flow therein from the first port when pressure in the first port is greater than pressure in the second port, and permitting flow through the second passageway to the first port when pressure in the first port is less than the pressure in the second port thereby affecting the balance of forces acting on the element so the element is urged toward the fully open position.Type: ApplicationFiled: December 4, 2013Publication date: June 4, 2015Applicant: Zhejiang DunAn Hetian Metal Co., Ltd.Inventors: Gengxun Kara Gurley, Edward Nelson Fuller, Parthiban Arunasalam
-
Publication number: 20150110148Abstract: A method of sensing superheat includes the steps of: (a) connecting a fluid inlet member of a superheat sensor to one of a plurality of fluid systems; (b) allowing fluid to flow from the fluid system to which the superheat sensor is connected to the superheat sensor; (c) sensing a temperature of the fluid in the fluid system with one of an internal temperature sensor mounted within a housing of the superheat sensor and an external temperature sensor mounted outside of the housing of the superheat sensor; and (d) calculating a superheat of the fluid in the fluid system.Type: ApplicationFiled: December 30, 2014Publication date: April 23, 2015Applicant: ZHEJIANG DUNAN HETIAN METAL CO., LTDInventors: Parthiban Arunasalam, Wayne C. Long
-
Publication number: 20140374633Abstract: A microvalve includes a base plate including a surface, a recessed area provided within the surface, a first fluid port provided within the recessed area, and a first sealing structure extending about the first fluid port. The microvalve also includes a cover plate including a surface, a recessed area provided within the surface, a second fluid port provided within the recessed area, and a second sealing structure extending about the second fluid port. An intermediate plate is disposed between the base plate and the cover plate and includes a displaceable member that is movable between a closed position, wherein the displaceable member cooperates with the sealing structures to prevent fluid communication between the fluid ports, and an opened position, wherein the displaceable member does not cooperate with at least a portion of the sealing structures to prevent fluid communication between the fluid ports.Type: ApplicationFiled: June 24, 2014Publication date: December 25, 2014Applicant: ZHEJIANG DUNAN HETIAN METAL CO., LTD.Inventors: Edward Nelson Fuller, Parthiban Arunasalam, Chen Yang, Mark Luckevich, Joe Ojeda
-
Publication number: 20140216572Abstract: A system for controlling the flow of a fluid from a source to a load includes a source. An on/off type of control valve communicates with the source. A micro-electric mechanical system communicates with the on/off type of control valve. A consuming device communicates with the micro-electric mechanical system. An electronic controller that communicates with the consuming device and the source. The electronic controller measures a change in a parameter of the micro-electric mechanical system that results from the flow of fluid through the micro-electric mechanical system to sense a flow of fluid through a micro-electric mechanical system.Type: ApplicationFiled: December 19, 2013Publication date: August 7, 2014Applicant: ZHEJIANG DUNAN HETIAN METAL CO., LTD.Inventors: Parthiban Arunasalam, Arvind Rao
-
Publication number: 20140174575Abstract: A device is disclosed that may include a spool valve having a first connector and a second connector and a spool movable for controlling flow between the first connector and the second connector, regardless of direction of flow through the spool valve. A pilot valve having an inlet and an outlet develops a command pressure. A feedback circuit having an inlet and an outlet develops a feedback pressure. The spool valve may be responsive to the command pressure and the feedback pressure. A fluid rectifier circuit is provided to connect the higher pressure of the first connector and second connector to the pilot valve inlet and feedback circuit inlet, and connect the other of the first connector and second connector to the pilot valve outlet and feedback circuit outlet.Type: ApplicationFiled: December 20, 2013Publication date: June 26, 2014Applicant: ZHEJIANG DUNAN HETIAN METAL CO., LTD.Inventors: Edward Nelson Fuller, Parthiban Arunasalam
-
Patent number: D542888Type: GrantFiled: January 13, 2006Date of Patent: May 15, 2007Assignees: Zhejiang Dunan Precision Industries Group Co., Ltd., Zhejiang Dunan Hetian Metal Co., Ltd.Inventors: Zichun Ye, Xuguang Huang, Guanjun Wang
-
Patent number: D548818Type: GrantFiled: January 13, 2006Date of Patent: August 14, 2007Assignees: Zhejiang Dunan Precision Industries Group Co., Ltd, Zhejiang Dunan Hetian Metal Co., LtdInventors: Zhongbo Feng, Xuguang Huang, Peiyu Cai