EP0108349A2 - Source de chaleur chauffée au gaz - Google Patents

Source de chaleur chauffée au gaz Download PDF

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Publication number
EP0108349A2
EP0108349A2 EP83110774A EP83110774A EP0108349A2 EP 0108349 A2 EP0108349 A2 EP 0108349A2 EP 83110774 A EP83110774 A EP 83110774A EP 83110774 A EP83110774 A EP 83110774A EP 0108349 A2 EP0108349 A2 EP 0108349A2
Authority
EP
European Patent Office
Prior art keywords
gas
pressure
chamber
line
combustion chamber
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Withdrawn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
EP83110774A
Other languages
German (de)
English (en)
Other versions
EP0108349A3 (fr
Inventor
Manfred Bartelt
Frank Bertram
Lothar Marrek
Wolfgang Rohde
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.)
Vaillant GmbH
Original Assignee
Joh Vaillant GmbH and Co
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
Priority claimed from DE19828230719 external-priority patent/DE8230719U1/de
Application filed by Joh Vaillant GmbH and Co filed Critical Joh Vaillant GmbH and Co
Publication of EP0108349A2 publication Critical patent/EP0108349A2/fr
Publication of EP0108349A3 publication Critical patent/EP0108349A3/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Withdrawn legal-status Critical Current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
    • F23N1/02—Regulating fuel supply conjointly with air supply
    • F23N1/025—Regulating fuel supply conjointly with air supply using electrical or electromechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/02—Regulating fuel supply conjointly with air supply
    • F23N1/027—Regulating fuel supply conjointly with air supply using mechanical means
    • 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
    • F23N2235/18—Groups of two or more 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
    • 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

Definitions

  • the present invention relates to a gas-heated heat source according to the preambles of the independent claims.
  • Such gas-heated heat sources are assigned a gas pressure regulator, which has a valve body in the gas flow path corresponding to a valve seat, which is coupled to a membrane, one side of which is exposed to the gas pressure behind the valve.
  • a rising gas pressure behind the valve brings the valve into the closed position, a falling gas pressure behind the valve causes a return spring to open the valve.
  • the gas pressure behind the valve is controlled by a second diaphragm-controlled valve, this diaphragm being exposed to the pressure of a diaphragm air pump on one side of its diaphragm chamber.
  • the present invention is therefore based on the object of suppressing such pressure fluctuations in the combustion chamber.
  • the figures show basic representations of fuel-heated heat sources and the control fittings.
  • the control valve 1 has a housing 2 of a gas pressure regulator, which has a gas inlet opening 3 and a gas outlet opening 4, which form a burner 5 of a fuel-heated heat source 6, such as a circulating water heater, continuous water heater or boiler or furnace.
  • the fuel-heated heat source consists essentially of a gas-tight housing which has an air inlet 7 on one side and a combustion outlet 8 on the other side, a fan 9 being arranged in the latter, the motor (not shown) of which acts on a line with electrical energy can be.
  • the burner 5 heats a heat exchanger 12 in the interior 64 of the fuel-heated heat source, which is connected to a flow line 13 and a return line 14 in which a circulation pump 15 is arranged.
  • the supply and return lines are connected to a consumer 16, which can consist of a plurality of radiators arranged in parallel and / or in series with one another, optionally also a domestic water heater. It may also happen that the water heater is arranged in a parallel branch to radiators and is a continuous water heat exchanger. In this case, there is a cold water tap, which is looped through the hot water heat exchanger and is provided with a water switch before it leads to a tap valve.
  • a chamber 20 is formed in which a valve 21 of a thermoelectric ignition fuse is arranged.
  • a valve seat 24 is provided, which can be closed by a valve body 26 articulated by a rod 25, which is under the restoring force of a compression spring 27, the rod being connected to a diaphragm plate 28 of a diaphragm 29, which in a further chamber 30 is clamped pressure-tight at its edge.
  • the chamber 30 is thus divided by the membrane 29 into two pressure chambers 31 and 32, of which the latter is connected to the outlet line 4.
  • the valve 24/26 is closed in the idle state, that is to say the chambers 22 and 32 are separated from one another.
  • the pressure chamber 30 is connected via a channel 33 to a valve center chamber 34 which is delimited by two valve seats 35 and 36 and an outflow opening 37.
  • a channel 38 leads from the valve seat 36 to a branching point 39, from which a channel 40 leads to the outlet line 4.
  • Another channel 41 leads to a membrane chamber 42, which is provided via a line 43 in which a valve seat 44 is connected to the outflow opening 37.
  • a valve body 45 corresponds to the valve seat 44, which can be moved in the open position by a compression spring 46 supported against the housing 2.
  • the valve body 45 is fastened to a membrane 47 which is under the action of a compression spring 48 which is adjustable by an adjusting screw 49 which in turn is guided in a thread in the housing 2.
  • a further membrane chamber 50 is formed, which is connected via an opening 10 to a further membrane chamber 51.
  • a valve body 57 which corresponds to a valve seat 58 arranged in the housing 2, is connected to the membrane 52.
  • the valve seat is connected to the membrane chamber 51 via a line 59.
  • the valve body 57 is under the action of a compression spring 60, which is supported with respect to the housing 2 and which tends to lift the valve body 57 from the valve seat 58.
  • the valve seat 58 is followed by a chamber 61, which is connected to the membrane chamber 51 via a bore 62 of relatively small cross-section.
  • the chamber 61 is connected to the suction port of a diaphragm pump 66, which is driven by a motor, not shown, which is supplied with energy via a line.
  • the branch pump has a pressure line 68 in which an air filter 69 is arranged and which is connected to the diaphragm chamber 51 via a throttle bore 70.
  • the valve seat 35 is controlled by a valve body 71 which is fastened to a lever 72 and is located in a space 73 which is controlled by the valve seat 35.
  • a valve body 71 which is fastened to a lever 72 and is located in a space 73 which is controlled by the valve seat 35.
  • an electromagnet 74 which is connected to a feed line 75 and which can pull the lever 72.
  • a tension spring 76 is provided which swings the lever about the pivot point 77 into the rest position shown in the drawing.
  • the space 73 communicates with the intermediate chamber 22 via a throttle bore 78.
  • the membrane 52 delimits a membrane chamber 18 which is at atmospheric pressure via an opening 17.
  • a compression spring 19 is supported in the membrane chamber 18, which is supported on the membrane 52 and on a spring plate 53, on which a pin 54 and a pressure piece 55 rest.
  • the pressure piece is under the action of a return spring 56 which is clamped between the housing 2 and the pressure piece 55 and acts in the same sense as the pressure spring 19.
  • a lever 80 which is pivotable about a pivot point 79 and is under the action of a pin 81, a membrane 82, bears against the pressure piece 55 is associated, which is clamped pressure-tight in a chamber 83 and forms two membrane chambers 84 and 85, which are connected to a partial load sensor via corresponding pressure connections.
  • a pressure compensation line 63 leads from the chamber 61 and leads to the interior 64 within the combustion chamber of the heat source 6.
  • the pressure prevailing in the interior 64 of the combustion chamber of the heat source 6 also prevails in the chamber 61 and thus at the intake port of the diaphragm air pump. It would also be possible to lead the pressure compensation line 63 to the chamber 51 or to the chamber 50 and to carry out the pressure compensation with the interior of the combustion chamber there. It is essential that the pressure difference between the two sides of the diaphragm 47 be kept such that there is an overpressure on the side of the diaphragm 47 facing the valve body 45. This is accomplished by lowering the pressure on the side of the membrane 47 facing the screw 49, specifically by connecting the pressure compensation line 63 to the negative pressure prevailing in the interior 64.
  • the heat source or tax office described above according to FIG. 1 has the following function: Starting from the idle state shown in the drawing, the valves 21, 24/26, 19, 57, 58 and 35/71 are closed, while the valve 36/71 and 44/45 is open.
  • the diaphragm pump 66 is de-energized, the pressure and suction ports have no pressure difference from one another.
  • the electromagnet 74 is without current.
  • the gas supply to the burner is interrupted.
  • thermoelectric pushbuttons By actuating the thermoelectric pushbuttons, the valve 21 is opened, so that the gas inlet 3 communicates with the intermediate chamber 22 and the bore 78 of the chamber 73, so that pilot gas is present at the pilot burner via the line 23 and can be ignited by means not shown and heats a thermocouple that excites the electromagnet of the thermoelectric ignition fuse via a line.
  • the valve 21 thus remains open even when the thermoelectric pushbutton is released.
  • the controller controls the delivery pressure via a more or less high Diaphragm air pump 66 a more or less large heat output of the heat source.
  • the blower 9 is much more powerful than that of the diaphragm pump 66, the pressure prevailing in the interior 64 of the combustion chamber propagates into the chamber 61 via the pressure compensation line 63.
  • the pressure influence here acts via the throttle bore 62 also in the membrane chamber 51 or via the throttle bore 10 also in the membrane chamber 50. This pressure thus affects the control pressure in chamber 32 and thus also the fuel throughput.
  • the control function of the gas pressure regulator according to FIG. 1 is adjusted so that the burner pressure and thus the gas throughput to the burner is constant when the static pressure at the nozzles against which the gas for primary air admixture flows is equal to the pressure against which the regulator works .
  • this essential requirement does not exist in the case of devices provided with an exhaust fan, since the two pressures can change independently of one another.
  • the present invention is therefore within the scope of the embodiments according to the figures two to four was based on eliminating the effects of pressure changes on both the nozzles and the gas fitting, which lead to changes in the gas throughput. As a result, the gas throughput remains constant under all conditions.
  • the control valve 101 has a housing 102 of a gas pressure regulator which is sealed with respect to the outside atmosphere and which has a gas inlet opening 103 and a gas outlet opening 104, which leads to a burner 105 of a fuel-heated heat source 106, such as a circulation water heater or boiler or furnace.
  • the fuel-heated heat source essentially consists of a gas-tight housing which has an air inlet 107 on one side and a combustion gas outlet 108 on the other side has, in the latter a fan 109 is arranged, the motor, not shown, can be supplied with electrical energy via a line.
  • the burner 105 heats a heat exchanger 112 in the interior 164 of the fuel-heated heat source, which is connected to a feed line 113 and a return line 114, in which a circulation pump 115 is arranged.
  • the supply and return lines are connected to a consumer 116, which can consist of a plurality of radiators lying in parallel and / or in series with one another, optionally also a domestic hot water heater. It may also happen that the water heater is arranged in a parallel branch to radiators and is a continuous water heat exchanger. In this case, there is a cold water tap, which is looped through the hot water heat exchanger and is provided with a water switch before it leads to a tap valve.
  • a chamber 120 In the area of the housing 102, downstream of the inlet 103, a chamber 120 is formed in which a valve 121 of a thermoelectric ignition fuse is arranged. Another is connected to the chamber behind the valve of the thermoelectric fuse Intermediate chamber 122, from which a pilot gas line 123 branches to burner 105.
  • a valve seat 124 In the intermediate chamber 122, a valve seat 124 is provided, which can be closed in the idle state by a valve body 126 articulated by a rod 125, which is under the restoring force of a compression spring 127, the rod being connected to a diaphragm plate 128 of a diaphragm 129, which in another chamber 130 is clamped pressure-tight at its edge.
  • the chamber 130 is thus divided by the membrane 129 into two pressure spaces 131 and 132, the latter of which is connected to the outlet line 104.
  • the valve 124/126 is closed in the idle state, that is to say the chambers 122 and 132 are separated from one another.
  • the pressure chamber 130 is connected via a channel 133 to a valve center chamber 134 which is delimited by two valve seats 135 and 136 and an outflow opening 137.
  • a channel 138 leads from the valve seat 136 to a branch point 139, from which a channel 140 leads to the outlet line 104.
  • Another channel 141 leads to a membrane chamber 142, which is connected to the outflow opening 137 via a line 143, in which a valve seat 144 is provided.
  • a valve body 145 corresponds to the valve seat 144, which can be moved in the open position by a compression spring 146 supported against the housing 102.
  • the valve body 145 is fastened to a membrane 147 which is under the action of a compression spring 148 which is adjustable by an adjusting screw 149 which in turn is guided in a thread in the housing 102.
  • a further membrane chamber 150 is formed, which is connected via the opening 110 to a further membrane chamber 151.
  • a valve body 157 is connected to the membrane 152, which corresponds to a valve seat 158 arranged in the housing 102.
  • the valve seat is connected to the membrane chamber 151 via a line 159.
  • the valve body 157 is under the action of a compression spring 160, which is supported with respect to the housing 102 and which tends to lift the valve body 157 from the valve seat 158.
  • a valve 161 adjoins the valve seat 158, which is connected to the chamber 151 via a bore 162 of relatively small cross section.
  • the chamber 161 Via a suction line 165, the chamber 161 is connected to the suction port of a diaphragm air pump 166, which is driven by a motor, not shown is supplied with energy via a line.
  • the diaphragm air pump has a pressure line 168, in which an air filter 169 is arranged and which is connected to the diaphragm chamber 151 via a throttle bore 170.
  • the valve seat 135 is controlled by a valve body 171 which is fastened to a lever 172 and is located in a space 173 which is controlled by the valve seat 135.
  • a valve body 171 which is fastened to a lever 172 and is located in a space 173 which is controlled by the valve seat 135.
  • an electromagnet 174 which is connected to a feed line 175 and which can pull the lever 172.
  • a tension spring 176 is provided which swings the lever about the pivot point 177 into the rest position shown in the drawing.
  • the space 173 communicates with the intermediate chamber 122 via a throttle bore 178.
  • the membrane 152 delimits a membrane chamber 118 which is connected in pressure to the chamber 161 via a line 187.
  • a compression spring 119 is mounted, which is supported on the diaphragm 152 and on a spring plate 153, on which a pin 154 and a pressure piece 155 bear.
  • the pressure piece is under the action of a return spring 156, which is clamped between the housing 102 and the pressure piece 155 and in the same sense how the compression spring 119 acts.
  • On the pressure piece 155 is a pivotable about a pivot point 179 lever 180, which is under the action of a pin 181, which is associated with a membrane 182, which is clamped in a chamber 183 pressure-tight and forms two membrane chambers 184 and 185, which via corresponding pressure connections are connected to a partial load encoder.
  • a pressure equalization line 163 leads from the chamber 161 and leads to the interior 164 within the combustion chamber of the heat source 106.
  • An air filter 186 is provided in the area of the chamber 161.
  • the pressure in the interior 164 of the combustion chamber of the heat source 106 also prevails in the chamber 161 and thus at the intake port of the diaphragm air pump and also in the diaphragm chamber 118.
  • the pressure prevails via the channel 133 in the chamber 130, whereupon the membrane 129 moves against the restoring force of the spring 127 from the rest position and thus moves the valve body 126 away from the valve seat 124.
  • the gas pressure is dependent on the valve position of the valve 144/145, which is influenced by the spring force of the spring 148, adjustable by the screw 149, the pressure in the chamber 137 such that a balance over the chamber 141 and the channel 140 Membrane 147 is formed. This results in a gas flow that just ignites the entire main burner.
  • the controller controls one more or less large delivery pressure of the diaphragm air pump 166 a more or less large heating power of the heat source.
  • the diaphragm air pump 166 conveys the air in a circuit, taking it out of the line 165, and builds up air pressure in the line 168
  • the mode of operation of the air pump and its switching has changed in the exemplary embodiment according to FIG.
  • the suction line 165 is decoupled from the chamber 161 of the housing 102, and its suction end projects freely into the atmosphere.
  • Another air filter 188 is connected to the intake line 165.
  • the diaphragm air pump 166 delivers air from the atmosphere via the suction line 165 and the filter 188 into the pressure line further air filter 169 is arranged.
  • Air pressure is applied to the diaphragm chamber 151 via the throttle bore 170.
  • a simplification has also been made in the course of the pressure compensation lines; only line 163 is provided, which connects the chamber 161 to the combustion chamber 164.
  • the chamber 118 is connected to the atmosphere via a bore 117.
  • the exhaust gas blower of the exhaust gas line 108 has been omitted in the fuel-heated heat source 106. Accordingly, this is a normal external wall unit that receives its supply air via the ring duct, its exhaust air, on the other hand, via the central interior and the supply air / exhaust gas discharge line that forms a unit. Furthermore, the diaphragm pump and the diaphragm chambers 118 and 151 have been omitted.
  • the line 187 opens directly into the diaphragm chamber 150, which is otherwise sealed off from the atmosphere. Any pressure fluctuations in the Interior 164 of the gas-heated heat source is thus transferred directly to membrane chamber 150 via line 187.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Driven Valves (AREA)
EP83110774A 1982-10-30 1983-10-28 Source de chaleur chauffée au gaz Withdrawn EP0108349A3 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19828230719 DE8230719U1 (de) 1982-10-30 1982-10-30 Gasbeheizte waermequelle
DE8230719U 1982-10-30
DE8329353U 1983-10-08
DE8329353 1983-10-08

Publications (2)

Publication Number Publication Date
EP0108349A2 true EP0108349A2 (fr) 1984-05-16
EP0108349A3 EP0108349A3 (fr) 1985-05-02

Family

ID=25949336

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83110774A Withdrawn EP0108349A3 (fr) 1982-10-30 1983-10-28 Source de chaleur chauffée au gaz

Country Status (1)

Country Link
EP (1) EP0108349A3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0326880A3 (en) * 1988-02-01 1990-11-07 Beretta A Ing Spa Automatic device for modulating the flow of combustion air and gas in gas heating apparatus
EP0533613A3 (en) * 1991-07-22 1993-08-11 Joh. Vaillant Gmbh U. Co. Servo-gas pressure regulator
DE4220579A1 (de) * 1992-06-24 1994-01-05 Mertik Regelungstechnik Gmbh Gasmengensteuerung, insbesondere für eine Armatur eines Durchlauf-Wassererhitzers
EP0626541A1 (fr) * 1993-05-28 1994-11-30 Ranco Incorporated Of Delaware Dispositif de commande de rapport gaz-air pour une boucle de régulation de température d'un appareil à gaz

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2295353A1 (fr) * 1974-12-16 1976-07-16 Saunier Duval Systeme regulateur de pression de gaz pour chaudieres a gaz a tirage force
DE7737272U1 (de) * 1977-12-07 1983-02-03 Joh. Vaillant Gmbh U. Co, 5630 Remscheid Feuerstaette
DE8005149U1 (de) * 1980-02-22 1981-11-19 Joh. Vaillant Gmbh U. Co, 5630 Remscheid Gasdruckregler

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0326880A3 (en) * 1988-02-01 1990-11-07 Beretta A Ing Spa Automatic device for modulating the flow of combustion air and gas in gas heating apparatus
EP0533613A3 (en) * 1991-07-22 1993-08-11 Joh. Vaillant Gmbh U. Co. Servo-gas pressure regulator
DE4220579A1 (de) * 1992-06-24 1994-01-05 Mertik Regelungstechnik Gmbh Gasmengensteuerung, insbesondere für eine Armatur eines Durchlauf-Wassererhitzers
EP0626541A1 (fr) * 1993-05-28 1994-11-30 Ranco Incorporated Of Delaware Dispositif de commande de rapport gaz-air pour une boucle de régulation de température d'un appareil à gaz
US5630408A (en) * 1993-05-28 1997-05-20 Ranco Incorporated Of Delaware Gas/air ratio control apparatus for a temperature control loop for gas appliances

Also Published As

Publication number Publication date
EP0108349A3 (fr) 1985-05-02

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Inventor name: BARTELT, MANFRED