EP1146288A1 - Soupape de commande proportionelle à gaz - Google Patents

Soupape de commande proportionelle à gaz Download PDF

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Publication number
EP1146288A1
EP1146288A1 EP00108147A EP00108147A EP1146288A1 EP 1146288 A1 EP1146288 A1 EP 1146288A1 EP 00108147 A EP00108147 A EP 00108147A EP 00108147 A EP00108147 A EP 00108147A EP 1146288 A1 EP1146288 A1 EP 1146288A1
Authority
EP
European Patent Office
Prior art keywords
chamber
orifice
communication
inlet
proportional control
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP00108147A
Other languages
German (de)
English (en)
Inventor
Gordon Fenn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cybertech Ventures Inc
Original Assignee
Cybertech Ventures 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 Cybertech Ventures Inc filed Critical Cybertech Ventures Inc
Priority to EP00108147A priority Critical patent/EP1146288A1/fr
Publication of EP1146288A1 publication Critical patent/EP1146288A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/04—Measuring pressure
    • 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
    • F23N2235/14—Fuel valves electromagnetically operated
    • 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
    • F23N2235/16—Fuel valves variable flow or proportional valves
    • 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
    • F23N2235/20—Membrane valves

Definitions

  • This invention is related to a proportional control gas valve that is capable of linearly controlling a relatively large range of gas flow while utilizing a very small amount of energy. Furthermore, it has a fail-safe mode of operation.
  • One of the conventional ways to control the flow rate of gas fuel is accomplished by having a number of gas burners present within a heating apparatus. When little heat is required, only some of those gas burners will operate. As more heat is required, more gas burners will operate within the apparatus.
  • Another conventional way to control the flow rate of gas fuel within a heating apparatus is to use several solenoid gas valves within a burner to control the flow rate of gas fuel. As more heat is needed, more of the valves within a burner commence operation within the heating apparatus.
  • the typical heating apparatus because the conventional gas solenoid valve is unable to control a large range of gas fuel flow rate, the typical heating apparatus, using the conventional gas solenoid valve, has a choice of flow rate from between one (1) to five (5) minimum heat to maximum heat range settings. This is a limited range of heat settings, reflecting the inability of the conventional gas solenoid valve to regulate a large range of gas fuel flow.
  • the small range of gas fuel flow provided by the gas solenoid valve has a number of disadvantages.
  • One disadvantage is that the gas solenoid valve cannot meet the needs of heat users requiring heat at a precise temperature.
  • Another disadvantage is that the small gas fuel flow range can waste energy, as heat users may be forced to utilize a higher heat setting than required because of the limited range of heat settings provided through the use of the conventional gas solenoid valve.
  • the conventional gas solenoid valve is very complicated in structure and requires a considerable amount of energy for operation.
  • the conventional gas solenoid valve generally includes a magnetic circuit formed with a fixed iron core, magnets and a magnetic member.
  • a coil holder is movably provided with respect to the outer periphery of the fixed iron core and has a magnetic coil wound around itself.
  • a sleeve is accommodated within the magnets and spaced apart from the outer periphery of the fixed iron core for a determined distance.
  • An actuating portion is formed with the fixed iron core. Therefore, it can be seen that the conventional gas solenoid valve is complex in structure.
  • the conventional gas solenoid valve is not equipped to halt the gas fuel flow.
  • the gas fuel will flow at the rate set by the manual switch heat range setting, until the heating apparatus is manually switched off. This is a potentially very dangerous situation.
  • This invention is related to a proportional control gas valve that is capable of linearly controlling a relatively large range of gas flow while utilizing a very small amount of energy and has a fail-safe mode of operation.
  • a proportional control gas valve includes a valve body formed with an inlet having a first orifice, a first chamber communication with the inlet through the orifice, a second chamber formed with a balancing orifice and a second orifice, a third chamber in communication with the first chamber through the balancing orifice, a fourth chamber in communication with the first chamber via the second orifice, a fifth chamber in communication with the fourth chamber, and an outlet in communication with the fifth chamber, a solenoid assembly mounted in the first chamber for controlling gas flowing from the first chamber to the fourth chamber via the second orifice, a main diaphragm arranged between the inlet and the third chamber, a valve spring mounted under the main diaphragm and urging the main diaphragm to move upwardly to close a passage from the inlet to the third chamber, a regulation diaphragm mounted inside the fifth chamber, a regulation spring mounted on the regulation diaphragm, an adjust stem connected with the regulation
  • the proportional control gas valve generally comprises a valve body 1, a main diaphragm 3, a valve spring 5, a solenoid assembly 10, a regulation diaphragm 16, an adjust stem 17, a regulator spring 19, a first gear 23, a second gear 24, and a servomotor 25.
  • the valve body 1 is provided with a valve cover 2 at the bottom and formed with an inlet 151 at one end, an outlet 161 at another end, a first chamber 101, a second chamber 102, a third chamber 103, a fourth chamber 104 and a fifth chamber 105.
  • the inlet 151 has an orifice 1511 in communication with the first chamber 101 which has a balancing orifice 71 and is provided with a solenoid assembly 10.
  • An orifice 81 is formed between the first chamber 101 and the fourth chamber 104.
  • the solenoid assembly 10 is used for controlling gas flowing out of the first chamber 101 into the fourth chamber 104.
  • the balancing orifice 71 is in communication with the second chamber 102 which is in turn communicated with the third chamber 103.
  • the main diaphragm 3 is provided at the bottom side with a diaphragm plate 4 and arranged between the outlet 151 and the third chamber 103 and urged by the valve spring 5 to go upwardly against the passage between the inlet 151 and the third passage 103.
  • the secondary diaphragm 16 is arranged within the fifth chamber 105 and urged by a regulator spring 19 to move away from a motor screw 24.
  • the secondary diaphragm 16 is provided with a valve element 17 which is installed between the fourth chamber 104 and the fifth chamber 105.
  • the fifth chamber 105 is in communication with the outlet 161.
  • the servomotor 25 is provided with a crank (not shown) which can be rotated with respect to the servomotor 25.
  • the servomotor may be of any conventional design well known to the art and is not considered a part of the invention.
  • the gas When the solenoid assembly 10 is moved upwardly to open the orifice 81, the gas will firs flow through the orifice 1511 into the first chamber 101 and then will be divided into two branch streams which will flow through the balancing orifice 71 and the orifice 81 into the second chamber 102 and the fourth chamber 104 respectively. Thereafter, one of the two branch streams will flow into the third chamber 103 to apply pressure on the bottom of the main diaphragm 3. However, as the main gas flow from the inlet 151 is divided into two branch streams, the pressure of each of the two branch streams will be lower than that the main gas flow so that the main diaphragm 3 will be pushed open by the main gas flow thereby enabling the main gas flow to go to the outlet 161.
  • the outlet pressure will be sensed by the regulation diaphragm 16 via a feedback potentiometer 80 or a pressure sensor 90 at the outlet 161.
  • the other branch stream will flow through the adjust stem 17 which is controlled by the regulator spring 19.
  • the servomotor 25 is drivingly connected to the gear 23 which is meshed with the gear 22 which is in turn connected with a motor screw 24 arranged on the top of the regulator spring 19, so that when the servomotor 25 is turned on, the gears 22 and 23 will be rotated to drive the adjust screw 20 to change the tension of the regulator spring 19 thereby accomplishing the purpose of controlling the pressure and flow rate of the gas flowing out of the outlet 161.
  • the servomotor 25 is controlled by the controller 26 which compares the outlet pressure with a preset value so that when the outlet pressure is not equal to the preset pressure, the servomotor 25 will be driven to adjust the position of the adjust stem 17 thereby maintaining a constant outlet pressure regardless of inlet pressure variations. When the outlet pressure is equal to the preset pressure, the power supplied to the servomotor 25 will be cut off thus saving the power required for the operation of the gas valve.
  • the controller 26 is well known to those having ordinary skill in the art and will not be described here in detail.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Feeding And Controlling Fuel (AREA)
EP00108147A 2000-04-13 2000-04-13 Soupape de commande proportionelle à gaz Withdrawn EP1146288A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP00108147A EP1146288A1 (fr) 2000-04-13 2000-04-13 Soupape de commande proportionelle à gaz

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP00108147A EP1146288A1 (fr) 2000-04-13 2000-04-13 Soupape de commande proportionelle à gaz

Publications (1)

Publication Number Publication Date
EP1146288A1 true EP1146288A1 (fr) 2001-10-17

Family

ID=8168471

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00108147A Withdrawn EP1146288A1 (fr) 2000-04-13 2000-04-13 Soupape de commande proportionelle à gaz

Country Status (1)

Country Link
EP (1) EP1146288A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0113876A2 (fr) * 1982-12-17 1984-07-25 Honeywell Inc. Appareil de contrôle de gaz
DE3841816A1 (de) * 1987-12-11 1990-07-19 Vaillant Joh Gmbh & Co Ventil, vorzugsweise regelventil zur regelung des gasdruckes gasbeheizter geraete
EP0614050A1 (fr) * 1993-03-04 1994-09-07 Joh. Vaillant GmbH u. Co. Dispositif de chauffage
US5413141A (en) * 1994-01-07 1995-05-09 Honeywell Inc. Two-stage gas valve with natural/LP gas conversion capability

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0113876A2 (fr) * 1982-12-17 1984-07-25 Honeywell Inc. Appareil de contrôle de gaz
DE3841816A1 (de) * 1987-12-11 1990-07-19 Vaillant Joh Gmbh & Co Ventil, vorzugsweise regelventil zur regelung des gasdruckes gasbeheizter geraete
EP0614050A1 (fr) * 1993-03-04 1994-09-07 Joh. Vaillant GmbH u. Co. Dispositif de chauffage
US5413141A (en) * 1994-01-07 1995-05-09 Honeywell Inc. Two-stage gas valve with natural/LP gas conversion capability

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