US3601310A - Apparatus for controlling the supply of gas to instant water heaters in circulation heating systems - Google Patents

Apparatus for controlling the supply of gas to instant water heaters in circulation heating systems Download PDF

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Publication number
US3601310A
US3601310A US871937A US3601310DA US3601310A US 3601310 A US3601310 A US 3601310A US 871937 A US871937 A US 871937A US 3601310D A US3601310D A US 3601310DA US 3601310 A US3601310 A US 3601310A
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US
United States
Prior art keywords
gas
radiator
water
motor
supply
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.)
Expired - Lifetime
Application number
US871937A
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English (en)
Inventor
Georg Hein
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
Application filed by Joh Vaillant GmbH and Co filed Critical Joh Vaillant GmbH and Co
Application granted granted Critical
Publication of US3601310A publication Critical patent/US3601310A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F23N1/08—Regulating fuel supply conjointly with another medium, e.g. boiler water
    • F23N1/10—Regulating fuel supply conjointly with another medium, e.g. boiler water and with air supply or draught
    • F23N1/105—Regulating fuel supply conjointly with another medium, e.g. boiler water and with air supply or draught using electrical or electromechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/345—Control of fans, e.g. on-off control
    • F24H15/35—Control of the speed of fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2233/00—Ventilators
    • F23N2233/02—Ventilators in stacks
    • F23N2233/04—Ventilators in stacks with variable speed

Definitions

  • a pump circulates hot water in a system including a gas fired heater and a radiator.
  • a bypass is across the radiator and includes a heat exchanger for heating domestic water.
  • a flow control in the system opens the bypass and shuts off flow to the radiator when domestic water is drawn.
  • a gas rate of flow control provides full gas supply when the radiator is cut off and reduced gas supply when water flows through the radiator.
  • the motor for the blower for removing gaseous products of combustion is at relatively high speed when there is full gas supply and at a comparatively lower speed when there is reduced gas supply.
  • This invention relates to apparatus for controlling the supply of gas to gas-heated instant water heaters which serve as heat source for a hot water circulation heating system and is an improvement in or modification of the apparatus claimed in U.S. Pat. application Ser. No. 687,267, filed Dec. 1, 1967, now U.S. Pat. No. 349,0693.
  • Said patent discloses apparatus for controlling the supply of gas to a gas-heated instantaneous water heater which serves as a heat source for a circulation hot water heating system in which a bypass line, controlled by a changeover valve and bypassing the radiator portion of the system, is provided between the feed and return line.
  • the apparatus has a water actuator which responds to the flow in the bypassed portion of the system and which moves a valve to reduce the supply of gas when the bypass line is closed or throttled.
  • a heat exchanger for heating service water may be associated with the bypass line. Throttling of the gas supply takes place during normal heating operation, i.e. when there is a flow of water in the radiator portion of the system.
  • the arrangement set forth in the said patent makes it possible to operate at full power while service water is drawn off and during the period when the system is being brought up to operating temperature.
  • the exhaust gases from gas-heated continuous-flow heaters can, of course, be discharged to the open air through an exhaust-gas blower.
  • the capacities of these blowers are selected according to the volume of exhaust gases produced when the continuous-flow heater is running under its full load for the particular installation.
  • a conventional exhaust-gas blower in apparatus as set forth in said patent, can be switched to two speeds, the higher speed corresponding to the full load for the continuous-flow heater and the lower speed to the volume of exhaust-gas occurring when the gas supply is reduced, the exhaust-gas blower being switched over by means of an electrical switch operable by the said water actuator.
  • FIG. 1 is a diagrammatic view of water heating apparatus incorporating the present invention.
  • FIG. 1a shows a detail of the apparatus.
  • a gas burner l is supplied with gas from a pipe 2 through an on-off gas valve 3.
  • the burner l is mounted in conventional fashion below a heating compartment (not shown) in which there is a finned block 4 acting as a heat exchanger.
  • a return pipe or conduit 5 forming part of a circulation heating system is connected to the upstream side of the finned block 4, and a supply pipe or conduit 6 is connected to the downstream side.
  • the return pipe 5 has a circulating pump 7 therein.
  • the supply pipe 6 leads to a changeover valve 8 to which a bypass 9 is coupled. This bypass 9 connects the supply pipe 6 directly to the return pipe 5 and includes a heat exchanger 10 for service water.
  • the service water flows through a coil 10 inside the heat exchanger 10.
  • a branch pipe or conduit 6 of the supply pipe 6 leads from the changeover valve 8 to room radiators,
  • the changeover valve 8 contains a valve member 8, which can be moved axially by means of a motor 12 and also forms a thermostat element.
  • a changeover valve 8 of this type is described in more detail in British Pat. Specification No. 1,157,134.
  • the changeover valve 8 remains in the position shown.
  • the valve member 8' is shifted to the right by the motor 12, but it does not close the mouth 9 of the connecting pipe 9 until the supply water in the supply pipe 6 exceeds a given temperature.
  • the changeover valve 8 occupies a position such that the supply pipe 6 communicates with both its branch 6' and the bypass 9.
  • motor 12 is controlled by a switching device 12a actuated by the flow, or absence of flow, of water in coil 10'.
  • the branch pipe 5' includes a venturi tube 13', at which a dynamic pressure difference, dependent on the throughput, is derived in a known manner and passed to a water actuator 14' through connections .1: and y which extend between the two.
  • the gas valve 3 which is biased by a spring 22, rests on an annular valve seat 23.
  • the valve 3 can be lifted off this seat by the armature of an electromagnet 25 which is provided with a dash pot device 24.
  • the electromagnet 25 is energized by way of contacts 26 closed by a diaphragm-type water actuator 27, which is connected to a venturi tube 28 incorporated in the supply pipe 6.
  • a diaphragm-type water actuator 27 which is connected to a venturi tube 28 incorporated in the supply pipe 6.
  • a valve for regulating the amount of flow of gas is provided upstream of the valve 3.
  • This valve comprises a disc 29 rotatably mounted below an annular valve seat 23.
  • the disc is held by a collar 30 on this seat. It is urged toward the open position by a spring 40.
  • the disc 29 has four sectors 29, which shroud corresponding sector-shaped apertures 23' in the annular valve seat 23 to a greater or lesser extent (FIG. la).
  • a downwardly projecting radial lug 31 is attached to rotatable disc 29.
  • a rod 32 engages this lug. It is actuated in the closing direction of rotation of the disc 29 by a pivoting lever 33, bearing on a rod 14" ofwater actuator 14'.
  • This actuator as is indicated by reference letters x, y, is connected to a venturi tube I3 disposed in a branch 5' (belonging to the radiator circuit) of the return pipe 5 Flow through the venturi tube 28 opens the gas valve 3 completely. However, as soon as hydraulic pressure is produced in the radiator circuit at the venturi tube 13 during flow through radiator 11, the disc 29 is rotated and the gas throughput is reduced.
  • a resistance 36 is connected in parallel with the switch 34. The switch and resistance are in series with the motor 35 of an exhaust-gas blower.
  • continuous-flow heater is in the prepare service water position.
  • the valve 8 opens the bypass line 9. There is no flow through radiator 11 and no dynamic pressure difference at the venturi tube 13.
  • the water actuator 14 is in its position of rest.
  • valve 8 During heating (occurring when valve 8 opens pipe 6), the pressure difference at the venturi tube 13' in the heating circuit causes the water actuator 14' to respond. This opens switch 34 and partially closes valve 23, 29. The motor 35 of the exhaust-gas blower is then in series with the resistance 36, so that the blower runs at a lower speed.
  • a water heater apparatus comprising a gas fired water heater, gas supply means for said heater, a radiator, first and second conduits connecting the heater and the radiator through which water circulates between the two, a pump in a conduit for causing said circulation, a changeover valve in the first conduit, a bypass connecting said valve and the second conduit and including a heat exchanger in the conduit, gas flow control means connected to one of the conduits between the radiator and the bypass for reducing the flow of gas to said heater when water is flowing through the radiator, and an electric motor for driving an exhaust gas blower, the improvement comprising:
  • said motor being a two-speed motor; and motor control means connected to said motor and operatively associated with said gas flow control means and connected to said gas supply means for operating said motor at a comparatively low speed when water is flowing through the radiator and at a comparatively high speed when water is not flowing through said radiator.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)
  • Regulation And Control Of Combustion (AREA)
  • Exhaust Gas After Treatment (AREA)
US871937A 1968-11-26 1969-10-28 Apparatus for controlling the supply of gas to instant water heaters in circulation heating systems Expired - Lifetime US3601310A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1810900A DE1810900C3 (de) 1968-11-26 1968-11-26 Steuervorrichtung für die Gaszufuhr bei gasbeheizten Durchlauferhitzern

Publications (1)

Publication Number Publication Date
US3601310A true US3601310A (en) 1971-08-24

Family

ID=5714306

Family Applications (1)

Application Number Title Priority Date Filing Date
US871937A Expired - Lifetime US3601310A (en) 1968-11-26 1969-10-28 Apparatus for controlling the supply of gas to instant water heaters in circulation heating systems

Country Status (7)

Country Link
US (1) US3601310A (nl)
BE (1) BE740272A (nl)
DE (1) DE1810900C3 (nl)
ES (1) ES371605A2 (nl)
FR (1) FR2024227A6 (nl)
GB (1) GB1229384A (nl)
NL (1) NL154321B (nl)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4738395A (en) * 1987-02-17 1988-04-19 Hot Water Equipment Corporation Fluid flow rate detector and system
US20070284454A1 (en) * 2006-06-08 2007-12-13 Cuppetilli Robert D Secondary heating system
US20090078783A1 (en) * 2006-06-08 2009-03-26 Cuppetilli Robert D Secondary heating and cooling system

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2549561C3 (de) * 1975-11-05 1985-03-21 Buderus Ag, 6330 Wetzlar Verfahren und Einrichtung zur Regelung der Kesselwassertemperatur in einer Heizungsanlage
DE2834025C2 (de) * 1978-08-03 1984-10-31 Robert Bosch Gmbh, 7000 Stuttgart Gasbeheiztes Gerät, insbesondere Wassererhitzer
EP0103303A3 (de) * 1982-09-15 1984-06-06 Joh. Vaillant GmbH u. Co. Brennstoffbeheizte Wärmequelle
AT383415B (de) * 1985-02-04 1987-07-10 Vaillant Gmbh Wasserheizer

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3383042A (en) * 1965-02-13 1968-05-14 Vaillant Joh Kg Gas-heated continuous-flow heater for hot-water circulation heating
US3426971A (en) * 1965-11-22 1969-02-11 Vaillant Joh Kg Arrangement in a hot-water circulation heating with domestic water heater

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3383042A (en) * 1965-02-13 1968-05-14 Vaillant Joh Kg Gas-heated continuous-flow heater for hot-water circulation heating
US3426971A (en) * 1965-11-22 1969-02-11 Vaillant Joh Kg Arrangement in a hot-water circulation heating with domestic water heater

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4738395A (en) * 1987-02-17 1988-04-19 Hot Water Equipment Corporation Fluid flow rate detector and system
US20070284454A1 (en) * 2006-06-08 2007-12-13 Cuppetilli Robert D Secondary heating system
US20090078783A1 (en) * 2006-06-08 2009-03-26 Cuppetilli Robert D Secondary heating and cooling system
US7628337B2 (en) * 2006-06-08 2009-12-08 Cuppetilli Robert D Secondary heating system

Also Published As

Publication number Publication date
DE1810900B2 (de) 1974-08-22
FR2024227A6 (nl) 1970-08-28
ES371605A2 (es) 1971-12-01
DE1810900A1 (de) 1970-09-17
GB1229384A (nl) 1971-04-21
NL6914061A (nl) 1970-05-28
BE740272A (nl) 1970-03-16
NL154321B (nl) 1977-08-15
DE1810900C3 (de) 1975-06-19

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