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WO1982003115A1 - Chauffe-eau - Google Patents

Chauffe-eau Download PDF

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Publication number
WO1982003115A1
WO1982003115A1 PCT/AU1982/000024 AU8200024W WO8203115A1 WO 1982003115 A1 WO1982003115 A1 WO 1982003115A1 AU 8200024 W AU8200024 W AU 8200024W WO 8203115 A1 WO8203115 A1 WO 8203115A1
Authority
WO
WIPO (PCT)
Prior art keywords
tank
water
heater
inlet
outlet
Prior art date
Application number
PCT/AU1982/000024
Other languages
English (en)
Inventor
Ronald James Woodleigh
Original Assignee
Ronald James Woodleigh
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 Ronald James Woodleigh filed Critical Ronald James Woodleigh
Publication of WO1982003115A1 publication Critical patent/WO1982003115A1/fr

Links

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
    • F24H1/20—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes
    • F24H1/201—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes using electric energy supply
    • F24H1/202—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes using electric energy supply with resistances
    • 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
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • F24H1/101—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium using electric energy supply
    • F24H1/102—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium using electric energy supply with resistance
    • 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
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/212—Temperature of the water
    • F24H15/223—Temperature of the water in the water storage tank
    • 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
    • F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
    • F24H9/2028—Continuous-flow heaters

Definitions

  • the present invention relates to water heaters and, in particular, to a non-storage instantaneous water heater which has a small uninsulated tank. This uninsulated tank does not store either a large quantity of water or water at an elevated temperature.
  • a non-storage instantaneous water heater comprising a small, uninsulated tank having an inlet and an outlet, a heating element in said tank, switch means connected in series with said heating element and sensing means responsive to flow of water in said outlet to close said switch means to activate said heating element only during said outlet water flow.
  • Fig. 1 is a front elevation, partly in section, of the water heater of the preferred embodiment
  • Fig. 2 is a cross-sectional view along the line
  • Fig. 3 is a cross-sectional view taken along the line III-III of Fig. 1,
  • Fig. 4 is a front elevation of the rear mounting plate forming a portion of the exterior housing of the heater of Fig. 1, and
  • Fig. 5 is a circuit diagram showing the inter ⁇ connection of the various circuit elements of Fig. 2.
  • the water heater of the preferred embodiment comprises a two part copper tank 1 which is approximately cylindrical in shape and formed by the joining about a mid-diameter of the tank 1 of two substantially identical halves.
  • the tank 1 is mounted within a housing 2 having a front cover 3 and rear mounting plate 4.
  • the tank 1 is secured to the rear mounting plate 4 by means of a semcircular band 5 which has a U-shaped bend 6 at one end that is secured to the plate 4 at the other end by means of a fastener 7.
  • the bend 6 engages a protrusion 8 to provide a convenient fixing arrangement.
  • the front cover 3 and rear mounting plate 4 overlap at 9 so as to provide a water tight seal between the front cover 3 and rear mounting plate 4.
  • the rear mounting plate 4 is also provided with an opening 10 through which an electric power cable (not illustrated) can enter the housing 2.
  • connectors 11 and 12 are provided for an inlet pipe 13 an outlet pipe 14 respectively
  • the inlet pipe 13 has an internal diameter of approximately 6mm and terminates flush with the bottom of the tank 1.
  • the outlet pipe 14 has an internal diameter of approximately 3mm (less than that of the inlet pipe 13) and is extended upwardly through the bottom of the tank 1 so as to terminate adjacent "the top of the tank 1) .
  • a coiled heating element 15 (preferably 3kw) is located adjacent the top of the tank 1 with the heat generating coils 16 being located below the top 17 of the outlet pipe 14. This ensures that in use the coils 16 are always immersed in water.
  • the heating element 15 is provided with terminals 18, 19 on the top of the tank 1. Also mounted on the top of the tank 1 is a metal body 20 having an annular centrally located peripheral flange 21.
  • the body 20 contains a thermostat of conventional construction.
  • the body 20 is mounted in thermal contact with the metal tank 1 by means of brass bolts 22 the heads of which are brazed or soldered to the copper tank 1.
  • the bolts 22 pass through corresponding openings (not illustrated) in the flange 21 and the body 22 is secured in place by means of a pair of nuts 23 for each bolt 22l
  • the inlet pipe 13 is provided with a T-joint 24 which is externally threaded.
  • a pressure transducer 25 having a plate like casing 26 is secured to the T-joint 24 by means of a tube 27 and nut 28 which when tightened provides a fluid tight seal between the tube 27 and T-joint 24.
  • a rubber diaphram 29 which abuts one end of a .plunger 30 which passes through the casing 26.
  • a recess 31 is provided in the other end of the plunger 30 and houses a helical spring 32.
  • a microswitch 33 is mounted adjacent the pressure transducer 25 so ' that the spring 32 abuts the microswitch 33 thereby urging the plunger 30 away from the microswitch 33 and towards the diaphram 29.
  • the microswitch 33 is normally open and closed by the plunger 30 depressing an operating button 34 of the microswitch 33.
  • a neon lamp 35 is located in the front cover 3 just above the microswitch 33.
  • the interconnection of the lamp 35 heating element 13, microswitch 33 and thermostat 36 is as illustrated in Fig. 5, the heating element being supplied from a main supply 37.
  • the tank 1 When initially operated, the tank 1 is empty and the hot water tap (not illustrated) is operated so as to supply mains pressure cold water to the inlet pipe 13. In a fraction of a second, cold water flows through the inlet pipe 13 and commences to fill the tank 1 thereby expelling the air within the tank via the outlet pipe 14.
  • the tank When the tank is full, because the cross-sectional area of the interior of the outlet pipe 14 is less than that of the inlet pipe 13, the water in the inlet pipe 13 experiences an increase in pressure brought about by the constriction of flow. This increase of pressure is applied to the rubber diaphram 29 thereby moving the plunger 30 to the left as seen in Fig. 2 in order to activate microswitch 33. This completes the circuit for element 13 and lamp 35 which are . thereby respectively heated and illuminated.
  • the water As cold water enters the tank 1 via the inlet pipe 13, the water is instantaneously heated by the element 15 and passes out the outlet pipe 17 as hot water. As soon as the hot water tap (not illustrated) is turned off, water ceases to flow through the inlet pipe 13 and also through the outlet pipe 14. In consequence, the pressure at the T-joint 24 in inlet pipe 13 is reduced thereby permitting spring 32 to move the plunger 30 away from the microswitch 34 which is thereby opened. In consequence, the element 15 is no longer energised. . In addition, the level of water within the tank drops to that of the top 17 of outlet 14 thereby maintaining the coil 16 of heating element 15 immersed.
  • the thermostat 36 is in good thermal communication with the water in the tank 1 owing to the tank 1 being formed of copper and the body 20 of the thermostat 36 being also formed from metal. In consequence, the thermostat 36 senses the water temperature even through no portion of the thermostat 36 is actually immersed in the water within the tank 1.
  • the thermostat 36 is set to open when the water in the tank 1 exceeds approximately 60-70°C.
  • the thermostat 36 will prevent the heating element 15 from boiling the water in the tank 1 and thereby causing a possible explosion. Since the lamp 35 is operated in parallel with the heating element 15, if the lamp 35 is not illuminated, this indicates some defect if the hot water tap has been turned on at that time.
  • the apparatus pf the preferred embodiment has a number of very substantial operational and constructional features. Since the preferred size of the tank 1 is only of the order of 250-300ml the tank 1 can be manufactured at extremely low cost. Also no insulation is required and therefore the cost of this component of conventional water heaters is eliminated. Furthermore, because the thermostat 36 is not required to be immersed in the water within the tank, very low cost thermostats, such as normally used in small domestic electrical appliances, are suitable for use with the water heater of he present invention.
  • the hot water produced by the water heater of the present invention is suitable for use in making heated beverages such as tea and coffee. This is not the case with
  • the 20 invention is most suitable as a point of use heater. That is to say, the heater is located adjacent the shower recess, bath, or sink where the hot water is intended to be used. However, in countries having a hot climate, because the difference in temperature between the incoming "cold" water
  • the apparatus of the preferred embodiment can be used to replace a domestic hot water service. In consequence, a very substantial saving in capital cost is achieved.

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)
  • Heat-Pump Type And Storage Water Heaters (AREA)

Abstract

Chauffe-eau instantane sans stockage possedant un reservoir (1) reduit et non isolant d'un volume de preference inferieur a un litre. Un corps de chauffe electrique (15) est dispose a l'interieur du reservoir (1) tandis qu'un thermostat (20, 36) est monte a l'exterieur, en contact thermique avec le reservoir (1). Un transducteur de pression (25) met sous tension le corps de chauffe (15) lorsque l'eau s'ecoule par l'orifice de sortie (14) accroissant ainsi la pression d'eau a l'orifice d'admission (13) etant donne que l'orifice de sortie (14) possede un diametre interne plus petit que celui de l'orifice d'admission (13) et que le reservoir (1) n'a pas d'autre sortie.
PCT/AU1982/000024 1981-03-10 1982-03-10 Chauffe-eau WO1982003115A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU792881 1981-03-10
AU7928/81810310 1981-03-10

Publications (1)

Publication Number Publication Date
WO1982003115A1 true WO1982003115A1 (fr) 1982-09-16

Family

ID=3698593

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1982/000024 WO1982003115A1 (fr) 1981-03-10 1982-03-10 Chauffe-eau

Country Status (3)

Country Link
EP (1) EP0073774A1 (fr)
AU (1) AU568284B2 (fr)
WO (1) WO1982003115A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2149895A (en) * 1983-11-18 1985-06-19 Triton Aquatherm Improvements in shower installations
US4786782A (en) * 1985-07-22 1988-11-22 Matsushita Electric Industrial Co., Ltd. Electric instantaneous water heater with enhanced temperature control
US4978833A (en) * 1989-01-27 1990-12-18 Bunn-O-Matic Corporation Hot water dispenser having improved water temperature control system
WO2007117128A1 (fr) * 2006-04-11 2007-10-18 Flavio Castillo Martinez Douche thermoélectrique automatisée
GB2524087A (en) * 2014-03-14 2015-09-16 Fathe Din Quik shower

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1428157A (en) * 1922-03-22 1922-09-05 Fisher Patents Co Inc Electric water heater
DE1147369B (de) * 1959-05-02 1963-04-18 Vaillant Joh Kg Elektrischer Durchlauferhitzer mit einem Durchflusskanaele und Heizwendeln aufweisenden, an eine Wasserarmatur angeschlossenen Heizkoerper
GB1551815A (en) * 1976-04-28 1979-09-05 Gardom G W Apparatus for heating liquid
GB1585695A (en) * 1976-12-30 1981-03-11 Bosch Gmbh Robert Gas-fired continuous-flow water heater

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1428157A (en) * 1922-03-22 1922-09-05 Fisher Patents Co Inc Electric water heater
DE1147369B (de) * 1959-05-02 1963-04-18 Vaillant Joh Kg Elektrischer Durchlauferhitzer mit einem Durchflusskanaele und Heizwendeln aufweisenden, an eine Wasserarmatur angeschlossenen Heizkoerper
GB1551815A (en) * 1976-04-28 1979-09-05 Gardom G W Apparatus for heating liquid
GB1585695A (en) * 1976-12-30 1981-03-11 Bosch Gmbh Robert Gas-fired continuous-flow water heater

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2149895A (en) * 1983-11-18 1985-06-19 Triton Aquatherm Improvements in shower installations
US4786782A (en) * 1985-07-22 1988-11-22 Matsushita Electric Industrial Co., Ltd. Electric instantaneous water heater with enhanced temperature control
US4978833A (en) * 1989-01-27 1990-12-18 Bunn-O-Matic Corporation Hot water dispenser having improved water temperature control system
WO2007117128A1 (fr) * 2006-04-11 2007-10-18 Flavio Castillo Martinez Douche thermoélectrique automatisée
GB2524087A (en) * 2014-03-14 2015-09-16 Fathe Din Quik shower
GB2524087B (en) * 2014-03-14 2016-12-14 Din Fathe Quik shower

Also Published As

Publication number Publication date
AU568284B2 (en) 1987-12-24
AU8127782A (en) 1982-09-23
EP0073774A1 (fr) 1983-03-16

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AL Designated countries for regional patents

Designated state(s): AT BE CF CG CH CM DE FR GA GB LU NL SE SN TD TG