WO2011127368A1 - Système de conversion de carburant - Google Patents

Système de conversion de carburant Download PDF

Info

Publication number
WO2011127368A1
WO2011127368A1 PCT/US2011/031717 US2011031717W WO2011127368A1 WO 2011127368 A1 WO2011127368 A1 WO 2011127368A1 US 2011031717 W US2011031717 W US 2011031717W WO 2011127368 A1 WO2011127368 A1 WO 2011127368A1
Authority
WO
WIPO (PCT)
Prior art keywords
fuel
regulator
outlets
outlet
inlet
Prior art date
Application number
PCT/US2011/031717
Other languages
English (en)
Inventor
Brian Streisel
Brian S. Vandrak
Liang Jianhui
Original Assignee
Enerco Group, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Enerco Group, Inc. filed Critical Enerco Group, Inc.
Publication of WO2011127368A1 publication Critical patent/WO2011127368A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K5/00—Feeding or distributing other fuel to combustion apparatus
    • F23K5/002—Gaseous fuel
    • F23K5/007—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/007—Regulating fuel supply using mechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K2900/00—Special features of, or arrangements for fuel supplies
    • F23K2900/05001—Control or safety devices in gaseous or liquid fuel supply lines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/24—Valve details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2237/00—Controlling
    • F23N2237/08—Controlling two or more different types of fuel simultaneously
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems

Definitions

  • Certain embodiments disclosed herein relate generally to fuel conversion system, and relate more specifically to a fuel conversion system comprising an integrated fuel distribution valve and convertible fuel regulator.
  • Valves and pressure regulators may be used in a variety of applications, including heat- producing devices.
  • valves and pressure regulators may be used in many varieties of heaters and other heat-producing devices which are adapted to utilize pressurized, fluid fuels. Some such devices are adapted to operate with liquid propane, while other devices are adapted to operate with natural gas.
  • the fuel conversion system may comprise a convertible regulator, a fuel distribution valve, and a transmission.
  • a convertible regulator may be adapted to receive either a first fluid fuel or a second fluid fuel.
  • a fuel distribution valve may be operatively engaged with said convertible regulator.
  • a transmission may be operatively engaged to said fuel distribution valve and operatively engaged with the convertible regulator.
  • Figure 1 is a perspective view of a fuel conversion system
  • Figure 2 is a perspective view of a fuel distributor valve
  • Figure 3 is perspective view of a convertible regulator
  • Figure 4 is perspective view of a transmission.
  • a fuel conversion system 10 may comprise a fuel distributor valve 20, a convertible regulator 40, and a transmission 60.
  • a convertible regulator 40 is in fluid communication with a fuel distributor valve 20; the convertible regulator 40 is operatively connected to a transmission 60; and the fuel distributor valve 20 is operatively connected to the transmission 60.
  • a fuel distributor valve 20 may comprise a valve body 22, a valve stem 24, a diverter (not shown), and a plurality of apertures 28, 29, 30, 31 , 32, 33.
  • a valve body 22 may define an interior region (not shown) separate from the environment 90.
  • a valve stem 24 may be rotatably engaged with a valve body 20.
  • 804814v2 2 may be housed within the interior region (not shown), may be rotatably engaged with the valve body 20, and may be operably connected to the valve stem 24 to rotate in response to rotation of the valve stem 24.
  • the valve stem 24 is fixedly connected to the diverter (not shown) so that the diverter (not shown) rotates by the same amount and direction in response to rotation of the valve stem 24.
  • engagement between the valve stem 24 and the diverter (not shown) may comprise a direct connection (not shown), a clutch (not shown), gears (not shown), or some combination thereof.
  • a plurality of apertures 28, 29, 30, 31, 32, 33 may be adapted to permit fluid communication between the interior region (not shown) and either the environment 90 or other components fluidly connected thereto.
  • the apertures 28, 29, 30, 31 , 32, 33 may comprise an inlet aperture 28, 29 and two or more outlet apertures 30, 31, 32, 33.
  • the apertures 28, 29, 30, 31 , 32, 33 are adapted to be operably engaged with other components of the fuel conversion system 10, an associated fluid fuel source (not shown), an associated fluid fuel receptacle device (not shown), or some other component or part. Without limitation operable engagement of either an aperture 28, 29, 30, 31, 32, 33 may comprise a threaded engagement.
  • Inlet apertures 28, 29 may be adapted to receive fluid fuel flow from a convertible regulator 40.
  • Inlet apertures 28, 29 may be adapted to send fluid fuel flow to an interior region (not shown), an outlet aperture 30, 31 , 32, 33, an associated fluid fuel receptacle device (not shown), or some combination thereof.
  • an inlet aperture 28, 29 may be fluidly connected to an associated fluid fuel source (not shown) through a convertible regulator 40.
  • outlet apertures 30, 31 , 32, 33 may be adapted to receive a fluid fuel flow from an interior region (not shown), an inlet aperture 28, 29, an associated fluid fuel source (not shown), a convertible regulator 40, or some combination thereof.
  • outlet apertures 30, 31, 32, 33 may be adapted to receive fluid fuel flow from an interior region (not shown), which receives fluid fuel flow from an inlet aperture 28, 29, which receives fluid fuel flow from a convertible regulator 40, which receives a fluid fuel flow from an associated fluid fuel source (not shown).
  • Outlet apertures 30, 31 , 32, 33 may be adapted to be operably engaged with an associated fluid fuel receptacle device (not shown) and to send a fluid fuel flow to an operably engaged associated fluid fuel receptacle device (not shown).
  • An associated fluid fuel receptacle device may be any type of device adapted to receive fluid fuel.
  • various types of fluid fuel receptacle devices may include a heater (not shown), a burner (not shown), an oxygen depletion sensor (not shown), or a filter (not shown).
  • each type of fluid fuel receptacle device has one or more species of device particular to each type fuel. That is, for sake of example and without limitation, a single type of fluid receptacle device, such as a burner, may comprise multiple species, such as a burner adapted to use natural gas, a burner adapted to use propane, and a burner adapted to use butane.
  • a single type of fluid fuel receptacle device may have a first species of a device adapted to use natural gas, and a second species of the device adapted to use propane.
  • an outlet aperture 30, 31 , 32, 33 may be fluidly connected to an oxygen depletion sensor adapted to use natural gas (not shown), an oxygen depletion sensor adapted to use propane (not shown), a burner adapted to use natural gas (not shown), a burner adapted to use propane (not shown), or some other species or type of fluid fuel receptacle device (not shown).
  • the apertures 28, 29, 30, 31, 32, 33 are adapted for selective fluid communication such that fluid communication between an inlet and outlet is user selectable.
  • the rotational position of the diverter selects which of the outlet apertures 30, 31, 32, 33 are in communication with certain of the inlet apertures 28, 29.
  • each inlet 28, 29 may be selectably engaged in fluid communication with any one of a plurality of outlet apertures 30, 31, 32, 33 where there is at least one outlet aperture for each inlet for each of the fluid fuels which the fuel distributor valve 20 is adapted to receive.
  • a fuel distributor valve 20 may comprise multiple sets of apertures.
  • the apertures 28, 29, 30, 31, 32, 33 may comprise a first set 34 of apertures 28, 30, 32 comprising a first inlet 28 and a first plurality of outlets 30, 32; and a second set 35 of apertures 29, 31 , 33 comprising a second inlet 29 and a second plurality of outlets 31 , 33.
  • the rotational position of the diverter selects one of the first plurality of outlets 30, 32 of the first set 34 to be in communication with the first inlet 28
  • the fuel distributor valve 20 comprises a particular set of outlets for each of the fuels which the fuel distributor valve 20 is adapted to receive; and the fuel distributor valve 20 further comprises a diverter (not shown) having a dedicated rotational position corresponding to a particular set of outlets for each of the fuels which the fuel distributor valve 20 is adapted to receive.
  • the fuel distributor valve 20 is adapted to received either natural gas or propane, comprises two sets of outlets, one set of outlets for natural gas, and one set of outlets for propane, and further comprises a diverter (not shown) having a dedicated rotational position corresponding to the set of outlets for natural gas and having a dedicated rotational position corresponding to the set of outlets for propane.
  • the fuel distributor valve 20 comprises a particular set of outlets for each of the fuels which the fuel distributor valve 20 is adapted to receive, and each of the particular set of outlets comprises an outlet for each of a plurality of associated fluid receptacle devices (not shown).
  • associated fluid receptacle devices may comprise a burner (not shown) and an oxygen depletion sensor (not shown).
  • the fuel distributor valve 20 is adapted to receive either natural gas or propane, comprises two sets of outlets, one set of outlets for natural gas 30, 31 , and one set of outlets for propane 32, 33, and further comprises a diverter (not shown) having a dedicated rotational position corresponding to the set of outlets for natural gas 30, 31 and having a dedicated rotational position corresponding to the set of outlets for propane 32, 33, and wherein the set of outlets for natural gas 30, 31 comprises one outlet 31 for a burner adapted to use natural gas (not shown) and one outlet 30 for an oxygen depletion sensor adapted to use natural gas (not shown), and wherein the set of outlets for propane 32, 33 comprises one outlet 33 for a burner adapted to use propane (not shown) and one outlet 32 for an oxygen depletion sensor adapted to use propane (not shown).
  • the rotational positions of the diverter may be separated by some angle theta. As shown in Figure 2, in certain embodiments, the angle separating the rotational positions of the diverter may be approximately 90 degrees.
  • all of the outlet apertures that are fluidly engaged with any inlet at any given position of the diverter (not shown) are adapted to use the same fuel.
  • the diverter (not shown) may have a first position that establishes a fluid connection to outlets 30, 31 and to associated fluid receptacle devices adapted to use a first fuel operably engaged thereto, in this example, and without limitation, natural gas.
  • the diverter (not shown) has a first position for use when the fluid fuel input to the inlet apertures is natural gas, that will provide fluid communication of the natural gas to associated fluid receptacle devices (not shown) adapted to use natural gas.
  • the diverter may have a second position that establishes a fluid connection to outlets 32, 33 and to associated fluid receptacle devices adapted to use a second fuel operably engaged thereto, in this example, and without limitation, propane. Accordingly, the diverter has a second position for use when the fluid fuel input to the inlet apertures is propane that will provide fluid communication of the propane to associated fluid receptacle devices adapted to use propane.
  • the fuel distributor valve 20 comprises a set of outlets for each fuel for which it is adapted to use, each set of outlets comprises an outlet for each type of associated fluid receptacle device (not shown) for which the valve is adapted to supply, and the diverter has a dedicated rotational position corresponding to each fuel for which the fuel distributor valve 20 is adapted to use.
  • a fuel distributor valve 20 may be made to function properly with any number, N, types of associated fluid receptacle devices and with any number, M, kinds of fluid fuel.
  • the valve may comprise N sets of apertures where each set corresponds to one of the N types of associated fluid receptacle device and wherein each set of apertures comprise M output apertures, wherein one output aperture in each set corresponds to one of the M kinds of fluid fuel.
  • the valve will comprise a diverter having M positions, wherein each of the M positions corresponds to one of the M kinds of fuels and to those outlet apertures corresponding to that kind of fuel.
  • a regulator is a unit capable of accepting an input fluid flow and outputting an output fluid flow of substantially constant pressure.
  • a convertible regulator 40 may be any regulator
  • a convertible regulator 40 may comprise a regulator housing 42, an inlet aperture 44, outlet aperture 46, an adjustor 48.
  • an adjustor 48 is adapted to modify a force or pressure put on another component, such as, without limitation, a diaphragm or a piston (not shown).
  • An adaptation to modify a force or pressure may comprise a screw, a threadedly engaged component, a spring, an elastomeric component, a cam, an electromagnet, and electromagnetic coil, a solenoid, or a combination thereof.
  • a convertible regulator 40 may comprise a rotatable adjustor 48 that is adapted to permit selection of the output pressure of the convertible regulator 40 by rotation of said rotatable adjustor 48.
  • the rotatable adjustor 48 comprises a threaded component 50, an axis of rotation (not shown), a spring contact surface (not shown), and a transmission engagement component (not shown).
  • regulator housing 42 is threaded to engaged the threaded component 50 of the rotatable adjustor 48 such that rotation of the rotatable adjustor 48 moves the rotatable adjustor 48 along its axis of rotation (not shown) into or out of the regulator housing 42.
  • the rotatable adjustor 48 is engaged with a spring (not shown) at a spring contact surface (not shown) to load the spring (not shown) and to provide thereby a spring force of which the selectable output pressure of the convertible regulator 40 is a function.
  • rotating the rotatable adjustor 48 to move it along its axis of rotation (not shown) into or out of the regulator housing 42 will change the load in the spring (not shown) with which it is engaged, and thereby change the selectable output pressure of the convertible regulator 40.
  • the rotatable adjustor 48 is threadedly engaged with the regulator housing 42 by a right-handed tliread, such that rotating the rotatable adjustor 48 clockwise advances engagement of the rotatable adjustor 48 into the regulator housing 42, increases the load in the spring (not shown) engaged with said rotatable adjustor 48, and increases the selectable output pressure of the convertible regulator 40.
  • rotation of the rotatable adjustor 48 is produced by application of work applied through transmission engagement component (not shown).
  • transmission engagement component (not shown) is operatively engaged with both the rotatable adjustor 48 and a transmission 60, such that application of work from the transmission to the transmission engagement component (not shown) results in rotation of the rotatable adjustor 48.
  • the spring (not shown) comprises a coil spring, an elastomeric material, or a cupped spring washer. In certain embodiments, the spring (not shown) produces a reaction force that is a substantially linear function of deflection. In certain embodiments, the spring (not shown) produces a reaction force that is a substantially non-linear function of deflection.
  • the convertible regulator 40 is adapted to selectively provide any output pressure within a continuous range of output pressures.
  • the continuous range of output pressures comprises a pressure appropriate to the supply of a first fuel and a pressure appropriate to the supply of a second fuel.
  • the continuous range of output pressures within which the convertible regulator 40 is adapted to selectively provide any output pressure comprises a pressure appropriate for the supply of natural gas and a pressure appropriate for the supply of propane.
  • a pressure appropriate for the supply of natural gas is within the range of 3-5 inches of water.
  • a pressure appropriate for the supply of propane is within the range of 9-1 1 inches of water.
  • a transmission 60 is a device that operates to transmit mechanical work from a first component to a second component.
  • the transmission is operatively engaged with both the fuel distributor valve 20 and the convertible regulator 40 so that adjustment of the fuel distributor valve 20 results in adjustment of the convertible regulator 40, or vice versa.
  • the transmission is operatively engaged with valve stem 24 and rotatable adjustor 48 so that adjustment of the valve stem 24 results in adjustment of rotatable adjustor 48, or vice versa.
  • the transmission 60 is operatively engaged with the diverter and spring (not
  • a transmission 60 may comprise a set of gears, a linkage, a four bar mechanism, a set of pulleys, a chain drive, a belt drive, or other work transmitters.
  • Gears may comprise spur gears, bevel gears, helical gears, hypoid gears, worm gears, or other types of gears.
  • the transmission 60 may comprise a first gear 62 operatively engaged with a second gear 64.
  • the transmission 60 may comprise a first gear 62 operatively engaged with the diverter (not shown) and operatively engaged with a second gear 64, and wherein second gear 64 is further operatively engaged with the rotatable adjustor 48.
  • first gear 62 comprises a work input region 66 adapted to permit work to be applied to first gear 62.
  • Work input region 66 may comprise any region adapted to permit the application of work to first gear 62.
  • work input region 66 may comprise a receptacle, hole, keyway, or other engagement surface 68 adapted to engage a wrench, screwdriver, lever, key or other tool (not shown).
  • work input region 66 may comprise a hexagonal receptacle comprising a substantially planar engagement surface 68 adapted to engage a hex wrench.
  • first gear 62 in operation, application of work to first gear 62 is done by inserting a hex wrench (not shown) into work input region 66 and rotating the hex wrench to rotate first gear 62 by some desired angular displacement. Rotation of first gear 62, in turn, rotates the diverter (not shown) and rotates the second gear 64. Rotation of second gear 64 results in adjustment of the load of the spring (not shown) and, thereby changes the selectable output pressure of the convertible regulator 40.
  • rotation of second gear 64 results in rotation of a transmission engagement component (not shown) operatively engaged with the second gear 64, which results in rotation of a rotatable adjustor 48 operatively engaged with the transmission engagement component (not shown), which results in axial motion of rotatable adjustor 48 into or out of the regulator housing 42, which changes the load of the spring (not shown) operatively engaged with
  • a transmission 60 may have some mechanical ratio, or mechanical advantage whereby, an angular displacement, angular velocity, angular acceleration, moment, or torque induced in a first component results in a proportionate angular displacement, angular velocity, angular acceleration, moment, or torque in a second component where the proportion may be greater than one, one, or some fraction.
  • the mechanical ratio is substantially constant over the range of motion of the transmission.
  • first gear 62 is substantially larger than second gear 64, such that an angular displacement of the first gear of some number of degrees, theta degrees, results in an angular displacement of the second gear of some number of degrees substantially larger than theta degrees.
  • the diameter of the first gear 60 is four times that of the second gear 64, then an angular displacement of the first gear by 90 degrees will result in an angular displacement of the second gear of 360 degrees.
  • the mechanical ratio is not substantially constant over the range of motion of the transmission.
  • certain mechanisms and linkages can be used as a transmission 60 which would allow transmission of motion in which the mechanical ratio would not be substantially constant over the range of motion of the transmission 60.
  • transmissions in which the mechanical ratio is not substantially constant over the range of motion of the transmission comprise four bar linkages, and other mechanisms and linkages.
  • either natural gas or propane is selected for supply to the fuel conversion system 10.
  • Selection of the type of fuel determines to which of the outlet 30, 31, 32, 33 the fuel should be issued.
  • Selection of natural gas requires that the diverter (not shown) be adjusted to provide fluid communication between inlets 28, 29 and outlets 30 and 31. Adjustment of the diverter (not shown) may be done by rotation of first gear 62 using a hex wrench (not shown) to apply work to work input region 66. Rotation of first gear
  • 804814v2 10 62 results in rotation of second gear 64, rotation of the rotatable adjuster 48, a change in the load of the spring (not shown) and thereby a change in the selectable output pressure of the convertible regulator 40.
  • the selectable output pressure of the convertible regulator 40 may be simultaneously adjusted to provide a pressure appropriate for the supply of natural gas.
  • selection of propane requires that the diverter (not shown) be adjusted to provide fluid communication between inlets 28, 29 and outlets 32 and 33. Adjustment of the diverter (not shown) may be done by rotation of first gear 62 using a hex wrench (not shown) to apply work to work input region 66.
  • Rotation of first gear 62 results in rotation of second gear 64, rotation of the rotatable adjuster 48, a change in the load of the spring (not shown) and thereby a change in the selectable output pressure of the convertible regulator 40.
  • the selectable output pressure of the convertible regulator 40 may be simultaneously adjusted to provide a pressure appropriate for the supply of propane.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Feeding And Controlling Fuel (AREA)

Abstract

L'invention porte sur un système de conversion de carburant, lequel système est adapté pour venir en prise de façon fonctionnelle avec l'une ou l'autre d'une première source de carburant fluide associée ou d'une seconde source de carburant fluide associée. Le système de conversion de carburant peut comprendre un régulateur convertible, une distribution de carburant et une transmission. Un régulateur convertible peut être adapté de façon à recevoir soit un premier carburant fluide soit un second carburant fluide. Une vanne de distribution de carburant peut venir en prise de façon fonctionnelle avec ledit régulateur convertible. Une transmission peut venir en prise de façon fonctionnelle avec ladite vanne de distribution de carburant et peut venir en prise de façon fonctionnelle avec le régulateur convertible.
PCT/US2011/031717 2010-04-08 2011-04-08 Système de conversion de carburant WO2011127368A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US32192010P 2010-04-08 2010-04-08
US61/321,920 2010-04-08

Publications (1)

Publication Number Publication Date
WO2011127368A1 true WO2011127368A1 (fr) 2011-10-13

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ID=44763298

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2011/031717 WO2011127368A1 (fr) 2010-04-08 2011-04-08 Système de conversion de carburant

Country Status (2)

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US (1) US20120031397A1 (fr)
WO (1) WO2011127368A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110869128A (zh) * 2018-01-05 2020-03-06 因美纳有限公司 测序系统中试剂冷却液不稳定性和流动池加热器故障的预测

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11619382B2 (en) 2020-02-21 2023-04-04 Hearth Products Controls Co. Adjustable fuel orifice

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US1697865A (en) * 1927-10-29 1929-01-08 A W Cash Valve Mfg Corp Regulating valve for pressure control of hot-water heating systems
US1755639A (en) * 1928-08-02 1930-04-22 David B Fawcett Pressure-regulating valve
US4546794A (en) * 1982-12-01 1985-10-15 The Boc Group Plc Gas mixing apparatus
US20080053535A1 (en) * 2006-08-30 2008-03-06 Leggitt Don C Cylinder valve regulator
US20080223465A1 (en) * 2007-03-14 2008-09-18 David Deng Fuel selection valve assemblies
US7654820B2 (en) * 2006-12-22 2010-02-02 David Deng Control valves for heaters and fireplace devices

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US2251019A (en) * 1938-04-05 1941-07-29 John M Hopwood Combustion control system
US8152515B2 (en) * 2007-03-15 2012-04-10 Continental Appliances Inc Fuel selectable heating devices
US8465277B2 (en) * 2009-06-29 2013-06-18 David Deng Heat engine with nozzle

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1697865A (en) * 1927-10-29 1929-01-08 A W Cash Valve Mfg Corp Regulating valve for pressure control of hot-water heating systems
US1755639A (en) * 1928-08-02 1930-04-22 David B Fawcett Pressure-regulating valve
US4546794A (en) * 1982-12-01 1985-10-15 The Boc Group Plc Gas mixing apparatus
US20080053535A1 (en) * 2006-08-30 2008-03-06 Leggitt Don C Cylinder valve regulator
US7654820B2 (en) * 2006-12-22 2010-02-02 David Deng Control valves for heaters and fireplace devices
US20080223465A1 (en) * 2007-03-14 2008-09-18 David Deng Fuel selection valve assemblies

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110869128A (zh) * 2018-01-05 2020-03-06 因美纳有限公司 测序系统中试剂冷却液不稳定性和流动池加热器故障的预测
CN110869128B (zh) * 2018-01-05 2021-10-08 因美纳有限公司 测序系统中试剂冷却液不稳定性和流动池加热器故障的预测

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