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US3625423A - Gas-heated hot water heater - Google Patents

Gas-heated hot water heater Download PDF

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Publication number
US3625423A
US3625423A US17500A US3625423DA US3625423A US 3625423 A US3625423 A US 3625423A US 17500 A US17500 A US 17500A US 3625423D A US3625423D A US 3625423DA US 3625423 A US3625423 A US 3625423A
Authority
US
United States
Prior art keywords
conduit
water
heat exchanger
gas
flow
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
US17500A
Other languages
English (en)
Inventor
Hans Meier
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 DE19691914463 external-priority patent/DE1914463C/de
Application filed by Joh Vaillant GmbH and Co filed Critical Joh Vaillant GmbH and Co
Application granted granted Critical
Publication of US3625423A publication Critical patent/US3625423A/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
    • F23N1/087—Regulating fuel supply conjointly with another medium, e.g. boiler water using mechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/18—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel
    • F23N5/188—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel 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
    • F23N2235/18—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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D10/00—District heating systems
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/17—District heating

Definitions

  • Prior Art includes a gas-heated hot water heater comprising a circulating water heater with a heat exchanger for heating domestic water by the circulating water.
  • the heat exchange is disposed in a connection line short-circuiting the heating circuit with provision for priority being given to the heating of the domestic water by the circulating heating water when domestic water is drawn.
  • the present invention relates to a gas water heating ap paratus having several taps in which the gas supply to the burner is controlled as a function of the flow through at least one of the taps.
  • a restrictor incorporated in the gas supply conduit to the burner which is adjustable to a reduced gas flow cross section by a flow sensor connected between hot water heater and one of the taps.
  • the gas supply to the burner is throttled automatically in dependence on a flow sensor and operation is effected with reduced heating output when water is drawn at a specific tap which belongs, for instance, to a lavatory.
  • the passageway for flow of the domestic water is already branched internally of the apparatus to form two conduit branches from the water heater and the flow sensor is arranged in one of these conduit branches.
  • the arrangement may be such that the flow sensor is formed by a venturi tube and a diaphragm-type actuator, that the gas restrictor is a pair of stops rotatable with respect to each other and having cutout portions, and that the diaphragmdype actuator engages one of the stops in a rotating sense against the action of a spring.
  • the hot water heater is designed as a circulating water heater including a heat exchanger for heating domestic water by the circulating water, with the heat exchanger being disposed in a connection line short-circuiting the heating circuit, when domestic water is tapped.
  • a venturi tube is arranged in the heating circuit adapted to be short-circuited, by which a second diaphragm-type actuator is operable, and that the rotatable stop is also operable by the second diaphragm-type actuator.
  • FIG. 1 schematically illustrates a circulating water heater embodying the invention, and including a heating system
  • FIG. 2 illustrates the restrictor for throttling the gas supply
  • FIG. 3 illustrates a modified embodied form of the invention
  • FIG. 4 illustrates another modification of the invention.
  • FIG. 1 a gas burner 1 is illustrated schematically. It is supplied with gas from a conduit 2 through a gas valve 3. As is conventional, the gas burner l is positioned below a heating section (not shown) closed at the top by a multiple fin block 4 acting as a heat exchanger. Connected to the input and output sides of a multiple fin block 4 are return flow conduit 5 and a supply flow conduit 6, respectively, of a circulation heating system. A circulating pump 7 is connected in the return flow conduit 5. The supply flow conduit 6 leads to a changeover valve 8 which has a connection 9' leading to bypass line 9. From the changeover valve 8 a branch 6' of the supply flow conduit leads to the room radiators II, to which the return flow conduit 5 also is connected.
  • the bypass 9 directly communicates the supply flow conduit 6 with the return flow conduit 5 through a heat exchanger 10.
  • Heat exchanger 10 has a coil 10' through which domestic water flows.
  • the supply flow conduit 6 communicates with the connection line 9 so that the circulating pump 7 generates a water circulation in a small circulation circuit through the multiple fin block 41, the supply flow conduit 6, the changeover valve 8, the connection line 9 and return 5.
  • the heating circuit containing the radiators 11 and the branch 6' of the supply flow conduit is short-circuited.
  • the changeover valve 8 includes a valve closure 8 which is moved axially by a servomotor l2. Closure 8 also is designed as thermostatic expansion body. A changeover valve 8 of the type indicated is more fully described in the German Pat. ap-
  • the changeover valve 8 assumes such a position that the communication of the supply flow conduit 6 is open to both conduit branch 6' and the connection line 9. Therefore, with relatively cold supply water, a large amount of water flows through the connection line 9 due to the smaller flow resistance and only a small amount of water flows to the radiators 11 through the conduit branch 6. As the temperature of the supply flow water increases the body 8 expands and the greater becomes the proportion of the water flowing through the conduit branch 6 and the smaller becomes the proportion of the water flowing through the connection line 9. Ultimately, the connection line 9 is shut off altogether and the total amount of water then flows into the heating circuit through 6.
  • the gas valve closure 3 is urged by a spring 13 to the seated position on a valve-seat ring 14.
  • the closure 3 is raised from the valve-seat ring 14 by an electromagnet 16 provided with a dash pot device 15.
  • the electromagnet 16 is energized through contacts 17 which are closed by a diaphragm-type water actuator 18.
  • the diaphragm-type water actuator 18 connects to a venturi tube 19 arranged in the supply flow conduit 6.
  • a differential water pressure is generated at the venturi tube 19, causing the water actuator 18 to respond and the magnet 16 to be actuated.
  • the gas valve 3 acting as a water deficiency safety device, the gas valve 3 is held open water deficiency safety device, the gas valve 3 is held open while the circulating pump 7 is operatmg.
  • a gas restrictor is connected in front of the gas valve 3 (HO. 2) to throttle the gas flow.
  • this gas restrictor takes the form of a shutter valve comprising a rotatable stop 20, rotatably mounted on a collar 21 of the valve seat ring 14.
  • the stop 20 has four solid sectors between which are openings. Sectors 20' cover corresponding sectorshaped apertures 14 of the valve-seat ring 14 to a greater or lesser extent depending upon the rotational position of stop 20.
  • a downwardly projecting radial lug 22 is provided on the rotatable stop 20 and is engaged by a driving pin 23.
  • the driving pin 23 is urged outwardly by an encircling spring 230 toward the position at which the shutter valve is fully open. against that urging the shutter valve is rotated toward the closed position by a water actuator 25, moving lever 24 and pin 23.
  • the water actuator 25 has two connections x and y leading to two connections x and y respectively on venturi 30 and line 28.
  • the coil in the heat exchanger 10 communicates with the house water supply 26.
  • the domestic water heated in the coil 10' is passed on through the hot water conduit 27.
  • the conduit 27 is divided into the branch conduits 28 and 29.
  • This pressure differential acts through connections at and y) causes water actuator to rotate stop 20 to reduce the gas flow to burner 1 to a predetermined extent.
  • the maximum water flow through branch 28 is less than that though branch 29 due to the presence of venturi 30 in branch 28. The extent to which the gas flow is reduced is correlated with this difference in maximum water flow.
  • the invention may also be used in a normal gas-heated instantaneous water heater which is not designed as a circulating water heater and whose water actuator 31 has a volumetric water regulator 32.
  • the hot water output of this apparatus is distributed into two branch conduits 34 and 35 connected to the output line 33. Though both branches the same, relatively small, amount of water can be drawn. While the amount of water which can be tapped from the first branch 34 is heated by the full gas load, when hot water is drawn from the second branch 35, there is a pressure differential at connections x and y of the flow sensor. In response to this pressure differential, actuator 25 partially closes the shutter valve 14, 20 to reduce the gas flow to the burner.
  • This flow sensor includes a venturi tube 36 arranged in branch conduit 35.
  • the difierential pressure water actuator 25 and shutter valve are similar to the embodiment of FIGS. 1 and 2.
  • cold water is admixed to the water heated with the full load (branch 34) to a relatively high temperature.
  • the same, relatively small, amount of water having a lower temperature and heated with partial load is, for instance, suited for filling a lavatory from branch 35.
  • changeover to partial load can also be efi'ected through a throttle valve 36 in the bypass channel 37, 38 of the volumetric gas governor designed in the conventional manner.
  • a gas water heater apparatus having a water line leading to a plurality of taps and including a gas burner with a gas conduit leading to the burner, the improvement comprising:
  • control means connected to said sensor and to said restrictor for reducing the as flow in the conduit in response to the flow of water in said one line.
  • said sensor includes venturi
  • said restrictor is a shutter valve including a rotatable stop
  • control means includes a diaphragm-type differential pressure actuator operatively connected to said stop and connected to the venturi.
  • apparatus is a circulating water heater with feed and return lines and a heat exchanger device for heating domestic water with a portion of the device connected as a bypass between said feed and return lines, wherein said flow sensor being operatively connected to said heat exchanger device to respond to flow through said device only.
  • apparatus is a circulating water heater with feed and return lines and a heat exchanger device for heating domestic water with a portion of the device connected as a bypass between said feed and return lines, wherein said flow sensor being operatively connected to said heat exchanger device to respond to flow through said device only.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Housings, Intake/Discharge, And Installation Of Fluid Heaters (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
  • Control Of Combustion (AREA)
US17500A 1969-03-21 1970-03-09 Gas-heated hot water heater Expired - Lifetime US3625423A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691914463 DE1914463C (de) 1969-03-21 Drosseleinrichtung für die Gaszuführung zum Brenner eines gasbeheizten Warmwasserbereiters

Publications (1)

Publication Number Publication Date
US3625423A true US3625423A (en) 1971-12-07

Family

ID=5728892

Family Applications (1)

Application Number Title Priority Date Filing Date
US17500A Expired - Lifetime US3625423A (en) 1969-03-21 1970-03-09 Gas-heated hot water heater

Country Status (5)

Country Link
US (1) US3625423A (xx)
BE (1) BE747437A (xx)
ES (1) ES192496Y (xx)
FR (1) FR2039839A5 (xx)
NL (1) NL7004009A (xx)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100308121A1 (en) * 2003-12-02 2010-12-09 International Thermal Investments Ltd. Diesel/electric heating appliance systems

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2034123A (en) * 1932-01-14 1936-03-17 Junkers & Co Liquid heater
US2901175A (en) * 1957-05-31 1959-08-25 Vaillant Joh Kg Water flow regulator for water heater
US3184164A (en) * 1963-09-13 1965-05-18 Maurice D Mccormick Rotary vane thermostat
US3414050A (en) * 1967-04-11 1968-12-03 Navy Usa Heat pipe control apparatus
US3490693A (en) * 1967-01-04 1970-01-20 Vaillant Joh Kg Gaseous fuel control for circulating heating systems

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2034123A (en) * 1932-01-14 1936-03-17 Junkers & Co Liquid heater
US2901175A (en) * 1957-05-31 1959-08-25 Vaillant Joh Kg Water flow regulator for water heater
US3184164A (en) * 1963-09-13 1965-05-18 Maurice D Mccormick Rotary vane thermostat
US3490693A (en) * 1967-01-04 1970-01-20 Vaillant Joh Kg Gaseous fuel control for circulating heating systems
US3414050A (en) * 1967-04-11 1968-12-03 Navy Usa Heat pipe control apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100308121A1 (en) * 2003-12-02 2010-12-09 International Thermal Investments Ltd. Diesel/electric heating appliance systems

Also Published As

Publication number Publication date
ES192496Y (es) 1975-01-01
BE747437A (fr) 1970-08-31
FR2039839A5 (xx) 1971-01-15
ES192496U (es) 1974-09-01
DE1914463A1 (de) 1970-10-01
NL7004009A (xx) 1970-09-23

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