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WO2013050578A1 - Instant gas water heater - Google Patents

Instant gas water heater Download PDF

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Publication number
WO2013050578A1
WO2013050578A1 PCT/EP2012/069802 EP2012069802W WO2013050578A1 WO 2013050578 A1 WO2013050578 A1 WO 2013050578A1 EP 2012069802 W EP2012069802 W EP 2012069802W WO 2013050578 A1 WO2013050578 A1 WO 2013050578A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
gas
water heater
partializing
heat exchanger
Prior art date
Application number
PCT/EP2012/069802
Other languages
French (fr)
Inventor
Fabrizio Brambati
Antonio Pia
Original Assignee
Riello S.P.A.
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 Riello S.P.A. filed Critical Riello S.P.A.
Publication of WO2013050578A1 publication Critical patent/WO2013050578A1/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
    • 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
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/60—Devices for simultaneous control of gas and combustion air
    • 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
    • F23N1/085—Regulating fuel supply conjointly with another medium, e.g. boiler water using electrical or electromechanical means
    • 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
    • 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
    • F24H1/12—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 in which the water is kept separate from the heating medium
    • F24H1/124—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 in which the water is kept separate from the heating medium 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
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/212—Temperature of the water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2208/00—Control devices associated with burners
    • F23D2208/10—Sensing devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/00003—Fuel or fuel-air mixtures flow distribution devices upstream of the outlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/00017—Assembled burner modules
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/14—Special features of gas burners
    • F23D2900/14041—Segmented or straight line assembly of burner bars
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/14—Special features of gas burners
    • F23D2900/14641—Special features of gas burners with gas distribution manifolds or bars provided with a plurality of nozzles
    • 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
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2237/00—Controlling
    • F23N2237/10—High or low fire
    • 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
    • F24H1/12—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 in which the water is kept separate from the heating medium
    • F24H1/14—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 in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form
    • F24H1/145—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 in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form 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
    • F24H15/00—Control of fluid heaters
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/174—Supplying heated water with desired temperature or desired range of temperature
    • F24H15/175—Supplying heated water with desired temperature or desired range of temperature where the difference between the measured temperature and a set temperature is kept under a predetermined value
    • 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
    • F24H15/176—Improving or maintaining comfort of users
    • 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
    • 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
    • F24H15/305—Control of valves
    • F24H15/31—Control of valves of valves having only one inlet port and one outlet port, e.g. flow rate regulating valves
    • 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
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/20—Solar thermal
    • 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
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies

Definitions

  • an instant gas water heater comprising a water circuit fed with water contained in a thank and heated by another, preferably natural, heat source; a gas burner for generating hot fumes; a heat exchanger for transferring heat from the hot fumes to the water circulating in the water circuit; an gas adjusting device for adjusting the gas flow rate to the gas burner as a function of water flow rate in the water circuit; and a partializing device for partializing the gas burner as a function of the water temperature in the water circuit upstream from the heat exchanger .
  • the structure of the gas burner is crucial in allowing a smooth partializing of the same.
  • the claimed structure allows indeed partializing with small quantity of energy.

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)
  • Control Of Combustion (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
  • Control For Baths (AREA)

Abstract

An instant gas water heater features a water circuit (4) fed with water contained in a thank (7) and heated by another, preferably natural, heat source; a gas burner (11) for generating hot fumes; a heat exchanger (10) for transferring heat from the hot fumes to the water circulating in the water circuit (4); a gas adjusting device (24) for adjusting the gas flow rate to the gas burner (11) as a function of water flow rate in the water circuit (4); and a partializing device (20, 21) for partializing the gas burner (11) as a function of the water temperature in the water circuit (4) upstream from the heat exchanger (10).

Description

INSTANT GAS WATER HEATER
TECHNICAL FIELD
The present invention relates to an instant gas powered water heater.
In particular, the present invention relates to a instant gas water heater, which is configured to operate in conjunction with a tank storing water heated from the sun or other source of natural heat. In practice, the instant gas water heater is fed with water supplied from the tank and has the function of possibly increasing the temperature of the water when the water temperature is below a given value .
BACKGROUND ART
Generally, the water heaters are of relatively simple construction in order to maintain low manufacturing cost. However, some control functions must be guaranteed either for the comfort of the user or for the optimizing the energy consumption. In particular, the mode of operation according to which the preheated water is fed to the water heater calls for adjusting the amount of heat supplied to the preheated water in order to avoid excessive temperate variations in the delivered water.
DISCLOSURE OF INVENTION
An object of the present invention is to provide an instant gas water heater that is able to combine a simple construction, low running costs, and comfort for the user.
In accordance with the present invention there is provided an instant gas water heater, comprising a water circuit fed with water contained in a thank and heated by another, preferably natural, heat source; a gas burner for generating hot fumes; a heat exchanger for transferring heat from the hot fumes to the water circulating in the water circuit; an gas adjusting device for adjusting the gas flow rate to the gas burner as a function of water flow rate in the water circuit; and a partializing device for partializing the gas burner as a function of the water temperature in the water circuit upstream from the heat exchanger .
In this way, the gas burner is adjusted in relation to the water flow rate flowing through the heat exchanger, and in function of the water temperature at the heat exchanger. The adjustment of the gas burner allows reducing considerably the temperature fluctuations related to changes in flow and water temperature at the heat exchanger, in a simple and economical manner. This solution is applicable for adjusting the temperature of the water when the water is heated from multiple sources.
According to a preferred embodiment of the present invention the gas adjusting device is mechanically operated by means of the energy associated with the water flow rate.
Preferably, gas adjusting device comprises a deformable body which deforms as a function of water flow rate; and a gas modulating valve mechanically connected to the deformable body.
In this way, electrically powered servomechanisms are no longer necessary.
According to a preferred embodiment the gas burner comprises a plurality of first nozzles and a plurality of second nozzles; the partializing device being designed to cut off gas feed to the plurality of second nozzle.
The structure of the gas burner is crucial in allowing a smooth partializing of the same. The claimed structure allows indeed partializing with small quantity of energy.
In particular, the gas burner comprises a diffuser, in turn comprising a first sector connected to a gas supply line to supply the first nozzles, and a second sector connected to the gas supply line to supply the second nozzles; the partializing device being designed to cut off the gas supply to the second sector as a function of the water temperature in the water circuit upstream from the heat exchanger.
The partition in sectors simplify the adjustment.
According to a preferred embodiment of the present invention, the partializing device comprises a shutter for closing the opening and interrupting the gas supply to the second sector.
In this way, the control is particularly simple. In particular, the shutter is located inside the diffuser.
According to a preferred embodiment the partializing device comprises a sensor, which is sensitive to the temperature of the water and is disposed along the water circuit upstream from the heat exchanger.
In order to actuate the present invention are not necessary accurate and expensive sensors. Threshold sensors can detect roughly the exceeding of a threshold value of temperature and are sufficiently accurate for the stated purpose .
Preferably, the partializing device is mechanically operated with the advantages of being free from electrical power sources.
According to a preferred embodiment of the present invention the sensor comprises a deformable thermo- sensitive element, such as a bimetallic strip, which is mechanically connected to the shutter for driving the shutter between a closed position and an open position.
In this way, the partializing device is completely mechanical and requires that the water circuit upstream from the heat exchanger includes a portion adjacent to the gas burner . According to another preferred embodiment of the present invention, the partializing device comprises an actuator electrically actuated to move the shutter between a closed position and an open position in function of the temperature detected by the sensor.
The electrical energy required for implementation of the actuator can be provided by a battery.
BRIEF DESCRIPTION OF THE DRAWINGS
Further characteristics and advantages of the present invention will appear clearer from the following description of preferred embodiments of the same, with reference to the figures of the accompanying drawings, in which :
- Figure 1 is a schematic view, with parts removed for clarity, of an instant gas water heater in accordance with a first embodiment of the present invention;
- Figure 2 is a schematic view, with parts removed for clarity, of an instant gas water heater in accordance with a second embodiment of the present invention;
- Figure 3 is a schematic view, on an enlarged scale and with parts removed for clarity, of a detail of the water heater of Figure 1; and
- Figure 4 is a schematic view, on an enlarged scale and with parts removed for clarity, of a detail of the water heater of Figure 2. BEST MODE FOR CARRYING OUT THE INVENTION
With reference to Figure 1, the numeral 1 indicates as a whole an instant gas water heater, which comprises a combustion chamber 2, a fume hood 3; a water circuit 4 which passes through the combustion chamber 2; a gas control unit 5, and a control device 6 for controlling the functions of the water heater 1. The water heater 1 is configured to operate in conjunction with a tank 7 containing water, which preferably was heated with other sources of heat such as, for example, solar panels or heat pumps, not shown in the accompanying figures. The water circuit 4 is connected to the water supply system 8 via a mixing valve 9. The water heater 1 comprises, moreover, a heat exchanger 10 which is located in the combustion chamber 2 and defines a portion of the water circuit 4, and a gas burner 11 located in the combustion chamber 2.
With reference to Figure 3, the gas burner 11 comprises a diffuser 12 comprising two sectors 13 and 14, each of which communicates with a plurality of nozzles 13A and 14A. In particular, the diffuser 12 has a chamber divided by a partition 15 so as to define a lower compartment and an upper compartment, which, in turn, is divided into two sectors 13 and 14 from one partition plate 15B. The gas burner 11 comprises a nozzle 16 for a pilot flame powered independently from the diffuser 12; a flame detector 17; and an ignition device 18.
The two sectors 13 and 14 communicate with the lower compartment through two respective opening 19L and 19R formed in the partition 15. The opening 19R can be selectively closed in function of the temperature of the water flowing in the water circuit 4 upstream from the heat exchanger 10 (Figure 1) . In the example shown in Figure 3, the closing of the opening 19R in the partition 15 is realized by a shutter 20 connected directly to a sensor 21 arranged along the water circuit 4 upstream from the heat exchanger 10 (Figure 1) . In particular, the sensor 21 comprises a bimetallic strip that changes its configuration as a function of the temperature of the water and determines the variation of the position of the shutter 20 without the need of electrical connections for the transmission of signals and electrical powered actuators for actuating the shutter.
The shutter 20 is movable between an open position, in which all the nozzles 13A and 14A of the gas burner 11 are fed with the gas, and a closed position, in which only the nozzles 13A directly communicating with the sector 13 are fed with gas. In practice, the gas burner 11 is easily partialized substantially as a function of the inlet temperature to the heat exchanger 10 (Figure 1) .
According to a not shown embodiment of the present invention, the nozzles of the gas burner 11 are equally distributed along the two sectors.
In accordance with the embodiment shown in Figures 1 and 3, the part of the water circuit 4 upstream from the heat exchanger 10 (Figure 1) comprises a portion arranged in close proximity to the diffuser 12 so as to mechanically connect the sensor 21 to the shutter 20, which is located inside the diffuser 12.
With reference to Figure 1, the gas is fed to the gas control unit 5 and from the gas control unit 5 to the nozzle of the pilot flame 16 and to the diffuser 12 along two separate gas supply lines 22 and 23. The gas control unit 5 comprises a gas adjusting device 24 of along the gas supply line 23. Also in this case, the gas modulation is realized in a mechanical way. The gas adjusting device 24 is of the mechanical type and comprises a deformable body 25 sensitive to the water flow rate in the water circuit 4, preferably upstream from the heat exchanger 10, and a modulation valve of the gas 26 connected mechanically to the deformable body 25. The gas adjusting device 24 comprises a flow rate regulator 27 controlled by the user to modify the gas flow rate in close proximity to the deformable body 25 and, consequently, modulate the water temperature .
The control device 6 comprises a control unit 28, a power source 29, preferably the battery to power the control unit 28, a fume sensor 30 connected to the control unit 28, the flame detector 17 connected to the control unit 28, and the ignition device 18 is also connected to the control unit 28. The control unit 28 is connected to the gas control unit to open and selectively close the supply of gas. Advantageously the water heater 1 does not need a connection to the electricity grid. In practice, the shutter 20 and the sensor 21 (Figure 3) mechanically connected to each other define a device for partializing the gas burner 11.
The water heater 1 allows adjusting the delivered water temperature in a plurality of ways. In the first place, the gas flow rate supplied to the gas burner 11 is modulated as a function of the water flow rate along the water circuit 4 upstream from the heat exchanger 10. The water flow rate in the water circuit 4 is directly proportional to the pressure and in this way it drives the deformable body 25 connected to the gas modulation valve. The flow rate regulator 27 allows modifying the water pressure in the water circuit 4 in close proximity to the deformable body 25 and, therefore, the flow rate regulator 27 allows to adjust the gas flow rate and, for a given extent, the water temperature. The flow rate regulator 27, in fact, is actuated directly by the user of the water heater 1.
The water supplied to the water heater 1 may assume values of temperature considerably different in function of the external weather conditions and the heat supplied by the natural sources. When the water temperature is greater than a given threshold value, the diffuser 12 is automatically partialized by the sensor 21 and the shutter 20 (Figure 3) .
In the rare event the water temperature is excessively high despite the partialization of the diffuser 12, the water temperature can be reduced by mixing the water supplied by the heat exchanger with water from the water supply system 8 via the drive of the mixing valve 9.
With reference to Figure 2, the sensor 21 is omitted and is replaced by a temperature sensor 31, which is arranged along the water circuit 4 upstream from the heat exchanger 10, and by an actuator 32, which is arranged close to the shutter 20 (Figure 4) and powered by gas control unit 5. According to this embodiment, the sensor 31, the actuator 32, and the shutter 20 define a partializing device for partializing the gas burner 11.
Compared to the technical solution shown in Figures 1 and 3, the embodiment of figures 2 and 4 is slightly more complex, but it allows simplifying the water circuit 4 upstream from the heat exchanger 10 because it no longer necessary that the water circuit 4 be located in close proximity to the gas burner 11.
Finally, it is evident that the instant gas water heater described can be subject to modifications, variations, improvements without departing from the scope of protection of the following claims.

Claims

1) An instant gas water heater, comprising a water circuit (4) fed with water contained in a thank (7) and heated by another, preferably natural, heat source; a gas burner (11) for generating hot fumes; a heat exchanger (10) for transferring heat from the hot fumes to the water circulating in the water circuit (4); an gas adjusting device (24) for adjusting the gas flow rate to the gas burner (11) as a function of water flow rate in the water circuit (4); and a partializing device (20, 21; 20, 31, 32) for partializing the gas burner (11) as a function of the water temperature in the water circuit (4) upstream from the heat exchanger (10) .
2) A water heater as claimed in Claim 1, wherein the gas adjusting device (24) is mechanically operated by means of the power associated with the water flow rate.
3) A water heater as claimed in claim 2, wherein the gas adjusting device (24) comprises a deformable body (25) which deforms as a function of water flow rate; and a gas modulating valve (26) mechanically connected to the deformable body (25) .
4) A water heater as claimed in Claim 3, wherein the gas burner (11) comprises a plurality of first nozzles (13A) and a plurality of second nozzles (14A); the partializing device (20, 21; 20, 31, 32) being designed to cut off gas feed to the plurality of second nozzle (14A) .
5) A water heater as claimed in any one of the foregoing Claims, wherein the gas burner (11) comprises a diffuser (12), in turn comprising a first sector (13) connected to a gas supply line (23) to supply the first nozzles (13A), and a second sector (14) connected to the gas supply line (23) to supply the second nozzles (14A); the partializing device (20, 21; 20, 31, 32) being designed to cut off the gas supply to the second sector (14) as a function of the water temperature in the water circuit (4) upstream from the heat exchanger (10) .
6) A water heater as claimed in Claim 5, wherein the first and second sector (13, 14) are separated by a partition plate (15B); the second sector (14) being connected to the gas feed line (23) through an opening (19R) .
7) A water heater as claimed in Claim 5 or 6, wherein the partializing device (20, 21; 20, 31, 32) comprises a shutter (20) for closing the opening (19R) and cutting off the gas supply to the second sector (14) .
8) A water heater as claimed in Claim 7, wherein the partializing device (20, 21; 20, 31, 32) comprises a sensor (21; 31) sensitive to the water temperature and located along the water circuit (4) upstream from the heat exchanger (10).
9) A water heater as claimed in claim 8, wherein the partializing device (20, 21) is mechanically operated.
10) A water heater as claimed in Claim 9, wherein the sensor (21) comprises a deformable heat-sensitive member, such as a bimetallic plate, connected mechanically to the shutter (20) to move the shutter (20) between a closed position and an open position.
11) A water heater as claimed in Claim 10, wherein the water circuit (4) upstream from the heat exchanger (10) comprises a portion adjacent to the gas burner (11) .
12) A water heater as claimed in Claim 8, wherein the partializing device (20, 31, 32) comprises an actuator (32) operated electrically to move the shutter (20) between a closed position and an open position as a function of the temperature recorded by the sensor (31) .
PCT/EP2012/069802 2011-10-06 2012-10-05 Instant gas water heater WO2013050578A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT001825A ITMI20111825A1 (en) 2011-10-06 2011-10-06 INSTANT GAS WATER HEATER
ITMI2011A001825 2011-10-06

Publications (1)

Publication Number Publication Date
WO2013050578A1 true WO2013050578A1 (en) 2013-04-11

Family

ID=45034060

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/069802 WO2013050578A1 (en) 2011-10-06 2012-10-05 Instant gas water heater

Country Status (2)

Country Link
IT (1) ITMI20111825A1 (en)
WO (1) WO2013050578A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106016691A (en) * 2016-07-11 2016-10-12 珠海格力电器股份有限公司 Gas wall-mounted furnace
CN106032937A (en) * 2015-03-13 2016-10-19 保登科技股份有限公司 Automatic temperature control system of gas water heater
EP3324130A1 (en) * 2016-11-18 2018-05-23 Bosch Termotecnologia S.A. Heating device and method for its operation
EP3667164A1 (en) * 2018-12-13 2020-06-17 Bosch Termotecnologia S.A. Heating device, especially a continuous heater, and ignition burner device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE717398C (en) * 1935-09-14 1942-02-13 Junkers & Co Boiling water heater
DE833692C (en) * 1949-12-29 1952-03-27 Georg Hegwein Flow-through liquid heater with a heater container, especially for generating boiling water or steam
FR2296146A1 (en) * 1974-12-24 1976-07-23 Saunier Duval FORCE DRAFT GAS BOILER REGULATION DEVICE
DE2943276A1 (en) * 1979-10-26 1981-05-07 Robert Bosch Gmbh, 7000 Stuttgart Gas or oil fired water heater - has burner and flow safety flue gas flap divided into independent halves
EP0036236A1 (en) * 1980-03-12 1981-09-23 Rheem Nederland B.V. Heating device

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Publication number Priority date Publication date Assignee Title
DE717398C (en) * 1935-09-14 1942-02-13 Junkers & Co Boiling water heater
DE833692C (en) * 1949-12-29 1952-03-27 Georg Hegwein Flow-through liquid heater with a heater container, especially for generating boiling water or steam
FR2296146A1 (en) * 1974-12-24 1976-07-23 Saunier Duval FORCE DRAFT GAS BOILER REGULATION DEVICE
DE2943276A1 (en) * 1979-10-26 1981-05-07 Robert Bosch Gmbh, 7000 Stuttgart Gas or oil fired water heater - has burner and flow safety flue gas flap divided into independent halves
EP0036236A1 (en) * 1980-03-12 1981-09-23 Rheem Nederland B.V. Heating device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106032937A (en) * 2015-03-13 2016-10-19 保登科技股份有限公司 Automatic temperature control system of gas water heater
CN106016691A (en) * 2016-07-11 2016-10-12 珠海格力电器股份有限公司 Gas wall-mounted furnace
EP3324130A1 (en) * 2016-11-18 2018-05-23 Bosch Termotecnologia S.A. Heating device and method for its operation
EP3667164A1 (en) * 2018-12-13 2020-06-17 Bosch Termotecnologia S.A. Heating device, especially a continuous heater, and ignition burner device

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