EP0155855A2 - Appareil de chauffage de l'eau chauffé par gaz - Google Patents

Appareil de chauffage de l'eau chauffé par gaz Download PDF

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Publication number
EP0155855A2
EP0155855A2 EP85302021A EP85302021A EP0155855A2 EP 0155855 A2 EP0155855 A2 EP 0155855A2 EP 85302021 A EP85302021 A EP 85302021A EP 85302021 A EP85302021 A EP 85302021A EP 0155855 A2 EP0155855 A2 EP 0155855A2
Authority
EP
European Patent Office
Prior art keywords
water
bore
heat exchanger
outlet
inlet
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Withdrawn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
EP85302021A
Other languages
German (de)
English (en)
Inventor
Harold Whittaker
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.)
BRAEMAR APPLIANCES PTY Ltd
Original Assignee
BRAEMAR APPLIANCES PTY Ltd
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 BRAEMAR APPLIANCES PTY Ltd filed Critical BRAEMAR APPLIANCES PTY Ltd
Publication of EP0155855A2 publication Critical patent/EP0155855A2/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/18—Water-storage heaters
    • F24H1/186—Water-storage heaters using fluid fuel
    • 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
    • F24H9/12—Arrangements for connecting heaters to circulation pipes
    • F24H9/13—Arrangements for connecting heaters to circulation pipes for water heaters
    • F24H9/133—Storage heaters

Definitions

  • This invention relates to water heating apparatus particularly gas hot water services.
  • the present invention has as its objective the provision of a gas water heating apparatus having improved efficiency and longer life.
  • a heat exchanger a hot water storage vessel having an inlet and outlet water connection, a heat exchanger positioned outside said vessel in the water connection between said inlet and outlet said heating exchanger including metal fins adapted to be heated by a gas burner said fins extending substantially radially from a pipe carrying water to be heated, said fins being enclosed and constructed that flue gases from said burner follow a path circumferentially around the pipe before flowing to exhaust.
  • a water heating system including a hot water storage vessel having an inlet and outlet water connection, a heat exchanger positioned outside said vessel in the connection between said inlet and outlet, said connection including an apertured body for securement to the vessel controlling the flow of water from a source of supply the vessel and the heat exchanger said apertured body including at least a cold water inlet aperture, an outlet aperture to said heat exchanger and a co-axial bore common to said apertures the bore dimension at the inlet aperture being smaller than that at the outlet, a tube positioned in said bore communicating with the inlet and outlet aperture.
  • a gas fired water heating system including a storage tank in which a quantity of water is adapted to be maintained at a predetermined temperature, a heat exchanger heated by a gas flame adapted to heat water stored in the tank, the water circulating through said exchanger during a heating cycle by thermo-syphon effect, and a water supply coupling allowing supply of water to the tank on demand and/or circulation of water during a heating cycle.
  • a heat exchanger for heating water including a finned pipe adapted to carry water to be heated, said fins being closely spaced for exposure to hot gases, the fin spaces extending around the pipe and including a baffle extending from the pipe and at least a partial enclosure for the exchanger the arrangement being such that hot gases circulate about the pipe imparting heat to the fins and the pipe, the baffle acting to direct the gases from the exchanger to exhaust.
  • connection for use in a hot water storage vessel said connection including a co-axial stepped diameter closed bore having at least two steps and adapted to open into the storage vessel, each stepped part of the bore being ported, the bore including a tubular insert extending thereinto and including a cut away or apertured portion communicating with the port associated with said intermediate bore and leaving an annular cavity communicating with the port associated with the largest stepped bore.
  • Figure 1 is a schematic view of a hot water system made according to the present invention.
  • Figure 2 is an elevational view of a water connection joint.
  • FIG. 3 is a detailed assembly view of the heat exchanger and burner.
  • Figure 4 is a sectional view of the heat exchanger.
  • a hot water storage vessel 10 which is preferably of similar construction to that used with electrical heating.
  • the vessel may be surrounded with suitable insulation 11 and be lined with' anti-corrosive enamel material known under the trade mark RILSAN. Further details of the vessel are described in our Australian Patent Specification No. 534148 which is hereby incorporated herein by cross reference.
  • the tank includes a conventional pressure and temperature sensitive valve 12.
  • the housing for the vessel is arranged to house a gas fired heat exchanger 13 through which water is circulated under control of the thermostat bulb 14. If the thermostat .senses a tank water temperature less than that predetermined the gas burner 17 is ignited to heat the exchanger 13 thereby setting up circulation of the water by thermo-syphon effect. The heated water fills the vessel until such time that the thermostat senses the higher than predetermined temperature and the gas flame is extinguished.
  • an apertured body 16 for interconnecting several pipes including a stepped bore 21a, 21b, 21c.
  • Each step is ported 22a, 23a, 24a to communicate with a cold water inlet 22, the heat exchanger inlet 23 and an outlet 24 to drainage respectively.
  • the body has fitted therein a long tube 25 fitted into stepped bore 21b leaving an annular passage 26 to the drain outlet 24.
  • the tube 25 includes a chamfered cut off 25a exposing the open end of the tube to the heat exchanger port 23a.
  • the tube 25 is adapted to extend into the vessel 10 as shown in Figure 1.
  • the open end of the tube is shrouded with a cap 26 to deflect in rushing cold water towards the bottom of the vessel 10.
  • the thermostat senses colder water and the gas burner 17 is ignited thereby creating a reversal of flow in the valve body 16 to the heat exchanger 13.
  • the tube 25 is fixed into position in the stepped bore by dimple 27.
  • the device includes at least one water supply pipe 30 entering a housing 31 enclosing heat conducting fins 35.
  • the housing includes a burner assembly 32 mounted beneath the fins. The draft of hot gases from the burner are adapted to flow between the fins around the pipe to the flue 33 in the direction of arrows A.
  • the exchanger includes a baffle plate 34 extending radially from the pipe directing the spent gases in a circuitous route around the water pipe and then into the flue.
  • the flue chamber may include preheater pipes 36 connected to exchanger pipes 30. The preheater pipes 36 are heated by the spent flue gases and furthermore absorb heat from the gas burner 17 by surrounding the fire box 17b.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
  • Details Of Fluid Heaters (AREA)
EP85302021A 1984-03-23 1985-03-22 Appareil de chauffage de l'eau chauffé par gaz Withdrawn EP0155855A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU4230/84 1984-03-23
AU423084 1984-03-23

Publications (1)

Publication Number Publication Date
EP0155855A2 true EP0155855A2 (fr) 1985-09-25

Family

ID=3694679

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85302021A Withdrawn EP0155855A2 (fr) 1984-03-23 1985-03-22 Appareil de chauffage de l'eau chauffé par gaz

Country Status (1)

Country Link
EP (1) EP0155855A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2234337A (en) * 1989-06-22 1991-01-30 Terance Gerard Madigan Domestic water heating assembly
CN106052088A (zh) * 2016-07-22 2016-10-26 中山市领锋电器有限公司 一种加热器外置循环预热及恒温电热水器

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2234337A (en) * 1989-06-22 1991-01-30 Terance Gerard Madigan Domestic water heating assembly
GB2234337B (en) * 1989-06-22 1993-09-29 Terance Gerard Madigan A domestic water heating assembly
CN106052088A (zh) * 2016-07-22 2016-10-26 中山市领锋电器有限公司 一种加热器外置循环预热及恒温电热水器

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 19860320

RIN1 Information on inventor provided before grant (corrected)

Inventor name: WHITTAKER, HAROLD