WO1988000318A1 - Instant water heater - Google Patents

Instant water heater Download PDF

Info

Publication number
WO1988000318A1
WO1988000318A1 PCT/EP1987/000351 EP8700351W WO8800318A1 WO 1988000318 A1 WO1988000318 A1 WO 1988000318A1 EP 8700351 W EP8700351 W EP 8700351W WO 8800318 A1 WO8800318 A1 WO 8800318A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
chamber
water heater
heater according
flow
Prior art date
Application number
PCT/EP1987/000351
Other languages
French (fr)
Inventor
Vitalino Gagliano
Original Assignee
A.T. Avanzata Tecnologia S.R.L.
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 A.T. Avanzata Tecnologia S.R.L. filed Critical A.T. Avanzata Tecnologia S.R.L.
Publication of WO1988000318A1 publication Critical patent/WO1988000318A1/en

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
    • F24H1/10—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
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/128—Preventing overheating
    • 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
    • F24H15/238—Flow rate
    • 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
    • F24H15/355—Control of heat-generating means in heaters
    • F24H15/37—Control of heat-generating means in heaters of electric heaters
    • 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 heating devices for water.
  • Electric instant water heaters have the disadvantage of having extremely hot outer walls and are therefore dangerous. Their operation by push-button or switch is also somewhat impractical.
  • the aim of the present invention is to create an electric instant water heater with almost cold outer walls which is therefore of very high efficiency, allowing easy installation and simple use-
  • an instant water heater which has a heating chamber equipped with a suitable electric element, this chamber is 15. surrounded by a pre-chamber and separated therefrom by a small cup like element; cold water is supplied to a pre-chamber zone so that the flow of cold water into the pre-chamber cools the heater outer walls and then, being in very good contact with the heating element, is very efficiently heated.
  • the heating element should be preferably connected to the mains supply through a relay incorporated into the water heater itself and operated by a flow-meter, also incorporated into the heater.
  • the flow-meter or flow sensing device should preferably be a permanent magnet which moves in a cylinder under the action of the water flow to the output tap and activates a sensor which controls the switching on and off of the electrical circuit.
  • the flow-meter, the spiral heating element and the relay are all integral with each other.
  • the water heater can be connected directly to the tap by an appropriate adapter, thus avoiding the necessity of wall mounted connections.
  • This is shown in its entirety by 1 and comprises an internal heating 15. chamber 6 equipped with one or more heating elements 7 in the form of a spiral and a pre-chamber 15 which surrounds the heating chamber 6.
  • a cup element 4 acts as a separator between the pre-chamber 15 and the heating chamber 6.
  • the pre-chamber 15 is defined externally by an outer wall 14 of the water heater and is connected to a cold 20. water intake adapter 5.
  • the base of the cup 4 is an upper insulated metal ring 21 which has a central aperture 13 through which the hot water flows.
  • the heating element is activated by a permanent magnet 19 which moves in a cylinder 16 forming the outlet for the hot water.
  • permanent magnet 19 is moved by the flow of water in the cylinder 16.
  • a sensor 20 is provided outside this cylinder which senses the position of the magnet.
  • the sensor 20 is connected to a relay 12 which connects and disconnects the heater to the mains supply.
  • the cylinder 16 is connected at one end thereof to the heating 5. chamber 6 by the insulated metal ring 21 and at the other end to an adapter 9 which connects the heater directly to the hot water tap (not shown) .
  • the proposed heater has no other fixing means apart from the adapters; the heater should preferrably be fixed vertically by adapter 9; a flexible hose should be connected to adapter 5 for 10. the cold water supply.
  • a thermostat 30 is connected to the relay 12.
  • the relay 12 and the thermostat 30 are separated from the heating chamber 6 by an insulated wall 32.
  • the relay, the heating element and the flow-meter are all coaxial.
  • the entire heater is of very reduced dimension so that it can be connected upstream of any cold-water supply tap e.g. under a sink or washbasin.

Abstract

A heating device for water, comprising an internal chamber (6), a heating element (7) and a pre-chamber (15), defined by an outer wall (14). The chamber (6) and pre-chamber (15) are separated by a cup element (4) intercepting and diverting the flow of the entering cold water so that it cools the outer wall (14) and runs over the heating element (7) absorbing the heat in the most efficient manner.

Description

-Λ
'INSTANT WATER HEATER"
The present invention relates to heating devices for water.
Electric or gas-operated water-heating devices for domestic use and/or personal hygiene are already known.
The use of electric boilers allows contemporaneous heating of large volumes of water; when the tap is turned on, a volume of hot water is run off and is replaced by an equal volume of cold water which reduces the temperature of the water contained.
Instant boilers are also known, mostly gas-boilers, which heat small quantities of water in a continuous and fast way; this eliminates the disadvantage of the water becoming progressively cooler. There are, however, limitations to the use of open flame gas boilers, for instance the law forbids to have them installed in bathrooms. 5. Furthermore, their installation in kitchens and other utility rooms requires their connection to the flue pipe.
Electric instant water heaters have the disadvantage of having extremely hot outer walls and are therefore dangerous. Their operation by push-button or switch is also somewhat impractical.
10. The aim of the present invention is to create an electric instant water heater with almost cold outer walls which is therefore of very high efficiency, allowing easy installation and simple use-
This aim is achieved by an instant water heater which has a heating chamber equipped with a suitable electric element, this chamber is 15. surrounded by a pre-chamber and separated therefrom by a small cup like element; cold water is supplied to a pre-chamber zone so that the flow of cold water into the pre-chamber cools the heater outer walls and then, being in very good contact with the heating element, is very efficiently heated.
20. The heating element should be preferably connected to the mains supply through a relay incorporated into the water heater itself and operated by a flow-meter, also incorporated into the heater.
The flow-meter or flow sensing device should preferably be a permanent magnet which moves in a cylinder under the action of the water flow to the output tap and activates a sensor which controls the switching on and off of the electrical circuit.
In a preferred embodiment, the flow-meter, the spiral heating element and the relay are all integral with each other. In this 5. case, the water heater can be connected directly to the tap by an appropriate adapter, thus avoiding the necessity of wall mounted connections.
A further preferred embodiment foresees the flow-meter, the spiral heating element and the relay arranged coaxially. There could also 10. be a thermostat which would prevent overheating.
A preferred but not limiting embodiment of the present invention is illustrated in the attached drawing, which shows an axial cross- section of the proposed heater.
This is shown in its entirety by 1 and comprises an internal heating 15. chamber 6 equipped with one or more heating elements 7 in the form of a spiral and a pre-chamber 15 which surrounds the heating chamber 6. A cup element 4 acts as a separator between the pre-chamber 15 and the heating chamber 6. The pre-chamber 15 is defined externally by an outer wall 14 of the water heater and is connected to a cold 20. water intake adapter 5. The base of the cup 4 is an upper insulated metal ring 21 which has a central aperture 13 through which the hot water flows.
The heating element is activated by a permanent magnet 19 which moves in a cylinder 16 forming the outlet for the hot water. The
25. permanent magnet 19 is moved by the flow of water in the cylinder 16. A sensor 20 is provided outside this cylinder which senses the position of the magnet. The sensor 20 is connected to a relay 12 which connects and disconnects the heater to the mains supply.
The cylinder 16 is connected at one end thereof to the heating 5. chamber 6 by the insulated metal ring 21 and at the other end to an adapter 9 which connects the heater directly to the hot water tap (not shown) . The proposed heater has no other fixing means apart from the adapters; the heater should preferrably be fixed vertically by adapter 9; a flexible hose should be connected to adapter 5 for 10. the cold water supply.
To prevent excessive overheating a thermostat 30 is connected to the relay 12. The relay 12 and the thermostat 30 are separated from the heating chamber 6 by an insulated wall 32. As shown, the relay, the heating element and the flow-meter are all coaxial.
15. The entire heater is of very reduced dimension so that it can be connected upstream of any cold-water supply tap e.g. under a sink or washbasin.
During operation, water enters through the adapter 5 into the pre-chamber 15, passes to the bottom of- chamber 6 and then runs over 20. the heating element 7, lifts upwards the magnet 19 and flows towards the hot taps. This movement is sensed by the sensor 20 which activates the relay 12 which immediately connects the heating element to the electric mains supply? from this moment all the water which flows is heated.

Claims

C L A I M S
1. An instant water heater (1) , characterized in that it comprises an internal chamber (6) containing at least one heating element (7) which is surrounded by a pre-chamber (15) which is defined externally by an outer wall (14) of the heater and into
5. which cold water enters by an intake adapter (5) ; the chamber (6) and pre-chamber (15) are separated by a cup element (4) which intercepts and diverts the flow of entering cold water in such a way that it first cools the outer wall (14) of the heater, then runs over the heating element (7) , absorbing the heat in the most effi-
10. cient manner.
2. A water heater according to Claim 1, characterized in that the heating element (7) is connected to the mains supply through a relay (12) activated by a flow-meter.
3. A water heater according to Claim 2, characterized in that 15. the flow-meter comprises a permanent magnet (19) which runs in a cylinder (16) , which acts as a conduit for the water, and a sensor (20) which senses the changes in position of the magnet.
4. A water heater according to Claims 1, 2 or 3, characterized in that it has a thermostat (30) to control the temperature; the
5. thermostat is connected in series to the flow-meter (19, 20) , so that it disconnects the relay (12) when there is an excessive rise in temperature.
5. A water heater according to any of the preceding Claims, characterized in that the heater element (7) is in the shape of a
10. spiral and is coaxial with the flow-meter.
6. A water heater according to any of the preceding Claims, characterized in that the heating chamber (6) is composed of a base formed by an insulated wall (32) in which the ends of the heating element (7) are embedded and by an upper ring (21) which connects,
15. by way of the passage (13) , the cylinder (16) with said chamber (6) .
7. A water heater according to any of the preceding Claims, characterized in that the upper ring (21) is the closed base of the cup (4) and the pre-chamber (15) .
8. A water heater according to any of the preceding Claims, 20. characterized in that the hot water outlet adapter (9) is at the end of the cylinder (16).
9. A water heater according to any of the preceding Claims, characterized in that the relay (12) is coaxial with the heater element (7) in the shape of a spiral.
10. A water heater according to any of the preceding Claims, characterized in that it is connected to the water mains and/or to a water tap through an adapter (9, 5) , thus avoiding any other form of fixing the same to the wall.
PCT/EP1987/000351 1986-07-01 1987-06-29 Instant water heater WO1988000318A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8622429U IT8622429V0 (en) 1986-07-01 1986-07-01 INSTANT HEATER FOR AQUA.
IT22429B/86 1986-07-01

Publications (1)

Publication Number Publication Date
WO1988000318A1 true WO1988000318A1 (en) 1988-01-14

Family

ID=11196192

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1987/000351 WO1988000318A1 (en) 1986-07-01 1987-06-29 Instant water heater

Country Status (4)

Country Link
AU (1) AU7707287A (en)
ES (1) ES1002769Y (en)
IT (1) IT8622429V0 (en)
WO (1) WO1988000318A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2270369A (en) * 1992-09-02 1994-03-09 Caradon Mira Ltd Electric instantaneous water heater
US5437003A (en) * 1994-12-16 1995-07-25 Hot Aqua Industries, Inc. In line tankless water heater with upper heating compartment, lower wiring compartment, and microswitch compartment disposed therebetween

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR567683A (en) * 1922-06-22 1924-03-07 Self-electric device for instantaneous heating of water, intended to adapt to a cold water pipe
GB1419618A (en) * 1971-12-10 1975-12-31 Brain J E Apparatus for heating liquids
GB2099557A (en) * 1980-09-02 1982-12-08 Loudon David Wallace Demand type of water heater

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR567683A (en) * 1922-06-22 1924-03-07 Self-electric device for instantaneous heating of water, intended to adapt to a cold water pipe
GB1419618A (en) * 1971-12-10 1975-12-31 Brain J E Apparatus for heating liquids
GB2099557A (en) * 1980-09-02 1982-12-08 Loudon David Wallace Demand type of water heater

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2270369A (en) * 1992-09-02 1994-03-09 Caradon Mira Ltd Electric instantaneous water heater
GB2270369B (en) * 1992-09-02 1996-06-26 Caradon Mira Ltd Heat exchanger
US5437003A (en) * 1994-12-16 1995-07-25 Hot Aqua Industries, Inc. In line tankless water heater with upper heating compartment, lower wiring compartment, and microswitch compartment disposed therebetween

Also Published As

Publication number Publication date
ES1002769U (en) 1988-06-16
AU7707287A (en) 1988-01-29
IT8622429V0 (en) 1986-07-01
ES1002769Y (en) 1989-02-01

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