EP2861914A1 - Chauffe-eau instantané - Google Patents
Chauffe-eau instantanéInfo
- Publication number
- EP2861914A1 EP2861914A1 EP13731072.8A EP13731072A EP2861914A1 EP 2861914 A1 EP2861914 A1 EP 2861914A1 EP 13731072 A EP13731072 A EP 13731072A EP 2861914 A1 EP2861914 A1 EP 2861914A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- channel
- water heater
- heating
- heating coil
- outer layer
- 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.)
- Granted
Links
- 238000010438 heat treatment Methods 0.000 claims abstract description 113
- 239000012530 fluid Substances 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 102
- 239000007788 liquid Substances 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 18
- 239000004020 conductor Substances 0.000 claims description 14
- 229910010293 ceramic material Inorganic materials 0.000 claims description 7
- 239000012777 electrically insulating material Substances 0.000 claims description 6
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 5
- 239000000395 magnesium oxide Substances 0.000 claims description 5
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 5
- 238000009529 body temperature measurement Methods 0.000 claims description 3
- 238000005485 electric heating Methods 0.000 claims description 3
- 238000003801 milling Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 2
- 238000009413 insulation Methods 0.000 abstract description 13
- 108091006146 Channels Proteins 0.000 description 94
- 229910052751 metal Inorganic materials 0.000 description 14
- 239000002184 metal Substances 0.000 description 14
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000012546 transfer Methods 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 229910001369 Brass Inorganic materials 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000010951 brass Substances 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 235000013353 coffee beverage Nutrition 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000005338 heat storage Methods 0.000 description 2
- 238000010348 incorporation Methods 0.000 description 2
- 239000008267 milk Substances 0.000 description 2
- 210000004080 milk Anatomy 0.000 description 2
- 235000013336 milk Nutrition 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 102000010637 Aquaporins Human genes 0.000 description 1
- 108010063290 Aquaporins Proteins 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 235000015114 espresso Nutrition 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000012254 powdered material Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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
- F24H1/12—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
- F24H1/121—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 electric energy supply
-
- 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
- F24H1/16—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 helically or spirally coiled
- F24H1/162—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 helically or spirally coiled using electrical energy supply
-
- 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
-
- 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
- F24H15/215—Temperature of the water before heating
-
- 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
- F24H15/219—Temperature of the water after heating
-
- 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
- F24H15/20—Control of fluid heaters characterised by control inputs
- F24H15/281—Input from user
-
- 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
- F24H15/00—Control of fluid heaters
- F24H15/40—Control of fluid heaters characterised by the type of controllers
- F24H15/414—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based
- F24H15/421—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based using pre-stored data
- F24H15/429—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based using pre-stored data for selecting operation modes
-
- 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
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1818—Arrangement or mounting of electric heating 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
- 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
-
- 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
- F24H15/242—Pressure
-
- 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
- F24H15/335—Control of pumps, e.g. on-off control
- F24H15/34—Control of the speed of pumps
Definitions
- a tubular heater with an electrical heating conductor and a metal tube for water are each guided in helical form with a plurality of turns running at a small distance from each other and cast into a metal body.
- DE 690 17 041 T2 describes a coffee machine with a heater with electrical resistance and coil in a metal block. The heat losses of the metal body are relatively large and the large mass of the metal body makes the radiator sluggish, so that heating of the water flowing through the metal pipe in a short time is not possible if the metal body is not already at a high temperature.
- a heating coil and capillary tube spiral are arranged radially at the same distance from an axis running side by side by casting over in a sleeve-shaped brass body.
- the liquid to be heated flows through a capillary tube which of course does not allow large flow rates.
- the heating coil runs directly on the outer surface of the brass body, resulting in a considerable heat loss.
- the arrangement of the capillary tube and the heating coil in the brass body is associated with a large manufacturing effort.
- EP 1 360 918 A1 describes an espresso machine in which an electric heating coil is arranged in a boiler. To quickly provide hot water, the water in the boiler must be kept at a high temperature even before the need for hot water, which is associated with an undesirable standby operation or with long heat-up times.
- an electric instantaneous water heater for heating liquid media which consists of an extruded part with a passage channel for the to be heated Zende medium and a tube portion for a compacted tubular heater and is wound into a helix.
- the heat-conducting connection from the tubular heater to the passage channel is formed only in a small peripheral region of the tubular heater, so that on the one hand the desired heat flow is reduced and on the other hand a larger peripheral area serves as a radiating surface over which a portion of the heat of the tubular heater is lost.
- a double helix with copper tube and heating resistor is wound around a water chamber, so that the heating resistor can heat the water in the chamber and the water in the copper pipe, wherein the heating in the copper pipe to
- the invention has for its object to provide an energy-efficient water heater, which is able to bring the respective liquid, such as water, milk or the like., In the shortest possible time to the desired temperature, and this in a cost-effective manner. According to the invention, this is achieved by the combination of the features of claim 1.
- the water heater is cylindrical in shape around a central axis. It comprises radially outside the outer layer with a helically arranged channel, radially inside to the outer layer then the inner layer with an electric heating coil and radially inside to the inner layer then the insulation layer.
- These three layers comprise material and shape properties corresponding to the respective function and they can be constructed of different layers.
- the arrangement of the layers ensures that substantially all the heat generated by the heating coil passes radially outward to the helical channel and that a structure with a small mass of material to be heated in relation to the channel volume is possible.
- the inner layer is formed between the heating coil and the channel with small thickness and / or of material with a high thermal conductivity.
- the inner layer comprises at least one heating coil.
- the inner layer comprises a layer extending from the heating coil to the outer layer with heat-conducting and electrically insulating material. If the material of the inner layer between the heating coil and the outer layer with the channel is electrically non-conductive, then as a heating coil, a non-insulated heating wire can be used and the heat of the heating wire passes directly, ie without delay, in the material of the inner layer between the heating coil and the outer layer. The radial thickness of this material need only be so large that an electrical penetration of the heating wire is excluded to a voltage applied to the inner layer metallic sleeve of the outer layer.
- the layer with heat-conducting and electrically insulating material between the heating coil and the outer layer has a radial extent of less than 4 mm, in particular less than 2 mm.
- the inner layer between the heating coil and the outer layer is formed by a compacted powder of magnesium oxide.
- a radial distance between the heating wire and the outer layer sleeve of 2 mm, in particular only 1.1 mm, is sufficient to prevent electrical breakdown.
- the innermost layer of the outer layer adjoining the inner layer can be formed by a thin sleeve of metal with high thermal conductivity. As a result, the heat from the heating wire with minimal delay in the medium located in the channel.
- the solution according to the invention makes it possible to wind the heating wire onto a bolt-shaped insulating layer, preferably made of ceramic, on which, if necessary, a thin layer of heat-conducting and electrically insulating material has already been applied.
- a bolt-shaped insulating layer preferably made of ceramic
- thermally conductive and electrically insulating material between the heating coil and the outer layer can be carried out in a sleeve with little effort. It is considerably simpler than the positioning required in the solutions according to the prior art.
- the outer layer comprises at least two layers which each form a wall of this outer layer.
- the channel is incorporated into one of these walls.
- the innermost layer of the outer layer closes the channel tight against the inside and lets the heat flow from the inner layer to the channel.
- a middle layer of the outer layer comprises the helical channel wall and an outer layer of the outer layer closes the channel tightly against the outside.
- the helically extending channel walls are made as narrow as possible so that in a longitudinal section of the cylindrical continuous flow heater the predominant length fraction is preferably more than 80%, in particular more than 90%, is occupied by the adjacent channel sections in the axial direction.
- the predominant length fraction is preferably more than 80%, in particular more than 90%, is occupied by the adjacent channel sections in the axial direction.
- an insulating layer with a thermal conductivity which is as small as possible is subsequently arranged on the inside of the inner layer.
- this insulating layer is also electrically insulating and a heating wire is wound directly onto the insulating layer.
- a heating wire is wound directly onto the insulating layer.
- this Embodiment is used as an insulating layer, for example, a cylindrical bolt made of ceramic material. On the bolt of ceramic material, the heating wire is wound helically.
- a thin heat-conducting but electrically insulating inner layer of the inner layer is applied to the bolt before winding, so that the heat emanating from the heating wire can flow around the heating wire in the heat-conducting material of the inner layer.
- the insulation layer comprises a layer or a region which is free and through which an electrical and / or a fluid line can be guided.
- the heating coil can thus have both electrical connections at the same end face of the flow heater, with one connection leading directly to the proximal end of the heating coil and the other through the insulation layer to the remote end of the heating coil.
- a fluid supply line is also passed through the insulation layer, so that the small amount of heat flowing away through the insulation layer can also be supplied to the fluid.
- the dimensioning of the water heater in particular the radial and axial dimensions of the outer layer and the inner layer, as well as the heating power of the heating coil can be easily adapted to the particular application.
- the instantaneous water heater according to the invention can be used advantageously wherever predetermined flow rates of a medium at a predetermined temperature must be provided without heat storage with short reaction times.
- the instantaneous water heater can be designed so that, after a delay of less than 7 seconds, it can continuously supply water at a temperature of 90 ° C, with the inlet temperature of the water at around 20 ° C and the volume of water in the channel at the same time about 8500mm 3 or 8.5ml. If 8.5ml of water is contained in the channel, water must be provided for 1dl of coffee in the amount of 12 times the channel volume.
- the water in the channel is first heated to the desired temperature during a short warm-up time. Then the water with the desired flow rate is conveyed through the water heater and heated to the desired temperature during flow.
- the inventive water heater can ensure the desired outflow of water with the desired temperature with an electrical power of 1100 watts.
- inventive water heater can be used with appropriate design. So that the water heater can adjust its performance or the heating of the fluid to a desired fluid outlet temperature and in particular to a respective fluid flow, it is supplemented with a controller which controls the electrical supply of the heating wire. The controller must receive at least an on-off signal that determines whether the heater wire should be electrically energized or whether no heat should be generated. If the heating wire is electrically powered, it can achieve a heating power according to the flowing current.
- the controller will in addition to the on-off signal, at least one more signal from a temperature sensor at the end of the water heater and / or by a flow sensor and / or obtained from a temperature sensor at the inlet of the water heater and take into account when adjusting the heating power.
- the instantaneous water heater according to the invention is also suitable for heating hot water obtained via faucets or shower heads. Because the powerful water heater can be manufactured inexpensively, it is possible to equip all consumption points with a water heater.
- the maximum heat output can be designed for the maximum hot water consumption (maximum temperature, maximum flow) of a point of consumption, whereby the different demands on the maximum water temperature and the maximum flow can be taken into account for different consumption points such as the bathroom or kitchen.
- the respective heating of the water can be adapted to the consumption temperature selected by the consumer. If the electrical supply of the water heater is connected via a control connection with a setting device of the fitting of the point of consumption, the heating power can be adjusted exactly to the selected position of the adjustment. If necessary, when adjusting the heating power also a temperature measurement during the passage of the water heater and / or a flow measurement used.
- the inventive instantaneous water heater allows service water to be provided directly at a very precisely predetermined temperature. If the heating of the service water emanates from the cold water, so can be dispensed with a central hot water storage tank and the parallel laying of hot and cold water pipes.
- the outlay for the water heaters required at the points of consumption is smaller than the expense for the hot water storage tank and the hot water pipes.
- hot water is kept in a reservoir in particular in a boiler and promoted as needed over a often very long line to the point of consumption and mixed with cold water so that water can be delivered at the desired temperature.
- the line from the reservoir to the point of consumption leads to the delayed arrival of the hot water and also the mixing ratio between the water from the reservoir and the cold water supply must be changed in the start-up phase.
- the instantaneous water heater according to the invention water of the desired temperature can be dispensed directly even if the consumption points are opened at different rates. If necessary, consumption points located close to one another are also operated via a common instantaneous water heater.
- the instantaneous water heater according to the invention can be used in a supplementary manner where the immediate purchase of hot water is always to be guaranteed, ie even if the water between the hot water tank Reservoir and the point of consumption has cooled. In this case, the heating power of the water heater is reduced with the arrival of coming from the hot water reservoir hot water or possibly switched off. In such an application, it is expedient if the instantaneous water heater comprises a temperature sensor both at the inlet and at the outlet.
- Rinsing and cleaning cycles can be used to remove dirt and limescale.
- the channel shape can be chosen so that there are no Ansetzstellen for the attachment of dirt and lime. If the channel is accessible for cleaning must, so the layers of the outer layer are formed so that at least the outermost layer of the outer layer in the axial direction can be deducted from the subsequent inner layer. As a result, the entire channel border is accessible, with a partial area at the innermost layer and a partial area at the outermost layer of the outer layer being accessible. This means that the outer layer comprises two sleeves, which can be pulled apart for cleaning.
- the insulating layer provided with the heating wire is arranged centrally in a first sleeve of good heat-conducting material, in particular in a first sleeve of metal, and in the annular region between the heating wire and the first sleeve of powdery material, preferably magnesium oxide, filled.
- the powdery material is compressed in the annulus.
- the filled first sleeve is narrowed radially inward by a rolling process, so that with the decreasing outer diameter of the first sleeve, the powdery material is compressed and the voids are displaced.
- the rolled and preferably closed at least one end face first sleeve is inserted into a second sleeve, wherein in an annular space between the two sleeves, the helically arranged channel is formed.
- the annular area between the two sleeves is sealed at the two front ends of the sleeves.
- two rings with laser seams are tightly connected to the sleeves.
- the helical channel may be incorporated in the outside of the first sleeve or in the inside of the second sleeve.
- a channel wall forming coil is used for channel formation between the two sleeves.
- the channel wall only has to ensure that the large proportion of the medium flowing through the channel flows completely along the spiral shape. Even if the channel wall does not connect completely tightly to both sleeves, a passage of the channel which is essentially following the helical shape is still ensured.
- the channel wall can be formed with a very small thickness, so that the majority of the annular space between the two sleeves of channel areas is occupied. In this case, the channel in cross-section preferably has a substantially rectangular shape.
- An inlet for a liquid to be heated and at the other end an outlet for the latter are then formed at one end of the channel.
- the inlet and the outlet preferably lead in the radial direction through the second sleeve. If the channel is incorporated in the outside of the first sleeve, the use of a rolling process for compacting, or narrowing radially inward, through the channel walls is made more difficult. At least for small diameter sleeves, it is advantageous if the channel is incorporated in the inside of the second sleeve and thus the first sleeve can be formed very thin-walled.
- the incorporation of the channel in the inside or the outside of a sleeve can be carried out with a turning process or a milling process.
- the second sleeves are separated from a tube in which a continuous channel was produced by means of rotation.
- the separated second sleeves have no end of the channel at the ends and therefore two rings with laser seams are tightly connected to the two sleeves. If the channel on the individual sleeves is worked out, it can be worked out so that a conclusion remains at both front ends and thus no rings must be used for the conclusion between the two sleeves.
- the incorporation of the channel in the inside or in the outside of a sleeve can also be carried out before the formation of the sleeve shape.
- a blank of a sheet can be pressed with a press into a mold, so that on one side of the sheet projecting segments of the channel wall.
- This sheet metal with projecting segments of the channel wall can then be formed into a tubular shape and closed at adjoining side lines with a longitudinal seam, in particular a laser seam, to form a tube.
- the segments of the channel wall then close to each other so that a helical channel wall is provided.
- the longitudinal seam must also be formed at the channel wall.
- the channel wall does not necessarily have to be continuous, because it only has to ensure that the water flows essentially along the channel through the instantaneous heater.
- Embodiments are also possible in which the channel wall is interrupted in the longitudinal seam, so that the side lines of the sheet metal blank to be joined together run along straight lines. As a result, the formation of the longitudinal seam is simplified.
- Figure 1 is a plan view of a water heater in the direction of arrow I of Figure 2, but without sheath.
- Figure 2 is a side view of the water heater with indicated casing. 3 shows a longitudinal section through the flow heater of Figures 1 and 2 ..;
- FIG. 5 shows a longitudinal section through a water heater with on the inner layer of a
- FIG. 6 shows a longitudinal section through a sleeve closed at one end face with inner layer and insulating layer arranged therein;
- Fig. 7 is a longitudinal section through a sleeve with the formed on the inside
- Duct wall two pipe connections and two end rings
- FIG. 8 is a perspective view of the sleeve of FIG .. 7
- FIG. 9 is a plan view of a Druchlauferhitzer of FIG .. 5
- Fig. 11 is a longitudinal section through a sleeve with the formed on the outside
- FIG. 12 is a perspective view of a water heater with two electrical connections and two line connections.
- Fig. 13 is a perspective view of a water heater with an axial line and two electrical connections.
- 1 shows a continuous flow heater 1 with at least one (preferably at least two) safety catch (s) and ground 2 in the circuit of a heating coil 3 and a sensor unit 4, which will generally comprise at least one temperature sensor.
- a control stage 5 is connected to the energy supplied to the heating coils 3 by a network connection 6.
- this control level 5 is provided with a program memory 7 to run one of several programs that can be accessed via an input unit 8, such as a keypad, a touch screen or a mere selector switch, via this input unit 8 expediently the desired heating temperature can be entered. This temperature is measured by the sensor unit 4 and fed to the control stage 5 as an input signal.
- an input unit 8 such as a keypad, a touch screen or a mere selector switch
- control stage 5 is connected to a pump control device 9, with which the flow rate of each liquid pumped through the water heater 1 - and thus the supply of cold liquid - regulated (eg via a in the sensor unit 4 or separately existing pressure sensor) or by controlling the Pump speed can be controlled.
- a pump control device 9 with which the flow rate of each liquid pumped through the water heater 1 - and thus the supply of cold liquid - regulated (eg via a in the sensor unit 4 or separately existing pressure sensor) or by controlling the Pump speed can be controlled.
- Fig. 3 has an outer layer 10 with approximately helically wound around a longitudinal axis A, in a wall 11 of the layer 10 incorporated, preferably milled channels 12 has.
- the channels 12 preferably have a different shape from a round or circular cross-section, and are thus - as shown - preferably rectangular or trapezoidal, so as to increase the surface area compared to the volume (compared to a circular cross-section).
- the ratio of the channel wall 14 facing a second inner layer 13 to the helical lateral boundary wall 15 is in the range of 1: 0.2 to 1: 0.25, but pitch of the helical shape and dimension can be varied.
- the wall of the wall 14 opposite, radially outer wall may optionally be shorter, in which case then by appropriate dimensioning of the side walls 15, a trapezoidal cross-section is formed.
- This outer layer has as a cover to a jacket tube 16, the shrunk best or warm, but then also - at least at the ends -, conveniently by means of laser welded.
- the continuation 14a corresponding to the channel wall 14 extends to at least one (unheated and heat-resistant) cover 17, whose function will be explained below and through which advantageously at least one end of the heating lines 3 runs (see FIG . 1 and 2).
- a respective inlet pipe 18 and a drain pipe 19 is provided, which theoretically parallel to the axis A in the channels 12, but preferably transverse to the axis A of the layered body of the water heater 1 are mounted, as shown in FIGS. 2 and 3 can be seen.
- the inner layer 13 consists of a heat-resistant, heat-conducting, eg ceramic, Schuleitermik, in which the coils 3a of the heating element 3 are embedded. These coils 3a are coiled in the same direction as the channels 12, ie they run parallel to them, so that an optimum heat transfer from the heating coils 3a to the channels 12 takes place. For this purpose, the heating coils 3a are arranged closer to the channels 12 than to the axis A.
- the distance a between the (circular) line of the channels 12 and the (circular) line of the heating coils is one quarter to one nem fifth of the distance a 'of the line of heating coils 3a to the axis A, so that the heat transfer from the heating coils 3a to the channels 12 can be done very quickly.
- At least one insulating layer in the form of a hollow tube 20 made of temperature-resistant material is provided against the axis A.
- the hollow interior of this tube can be filled with heat-resistant insulating material 21, in particular ceramic, so as to reduce the energy-absorbing volume and thus to save energy when heating the liquid in the channels 12. But it is also possible to use the air inside the hollow tube 20 for the insulation.
- the attachment of a connected to the control stage 5 and controlled by her vibrator 24 on the outside of the water heater 1 is advantageous.
- its operation favors the heating, on the other hand it can be used after switching off the heating and / or shortly before commissioning for cleaning or decalcifying the channels 2.
- the respective operating mode and / or the vibration frequency or intensity can be set by the input unit 8.
- the axial position of the vibrator 24 is adjustable.
- the axial position of the vibrator 24 can be adjusted before the outer attachment of at least one of the layers 22, 23. The displacement takes place via a fixable with a clamping screw 26 support ring 25. It can but a improved heat transfer can be achieved in that at least one of the layers 22, 23 and / or (in particular) of the support ring 25 is poured.
- a rapid temperature change can be brought about can, via the input unit 8 different programs, such as a therapy program with a change of water temperature in the manner of a Kneipp cure, a rinse (after completion of heating) or programming for the pump control 9 in such a way that the fluid pressure at the beginning of heating is lowered (facilitates rapid heating).
- the program memory 7 is provided.
- a radiator 13a is provided, which is basically constructed similar to that described above with reference to the layers 13, 20 and 21.
- the channels are not milled on the outside, but from the inside (in principle, the production of the channels would also be conceivable by turning).
- the thus prepared wall 10a of the outer layer 10 is then warmly applied to the body 13a and adheres to it after cooling. Again, it is expedient if the outer layer 10a is subsequently welded to the (axial) ends, in particular by laser welding.
- FIGS. 5 to 9 show the construction and elements of a readily produced continuous heater 1.
- a cylindrical bolt of ceramic material is used as the insulating layer 21. Because the insulation material is sufficiently stable, it is possible to dispense with a tube 20 surrounding this material.
- On the bolt of ceramic material of the heating element 3 or resistance heating wire is wound as a heating coil 3a.
- the insulation layer 21 provided with the heating coil 3a is arranged centrally in a first sleeve 10b made of metal and in the annular region between the heating coil 3a and the first sleeve 10b is powdered material, preferably magnesium oxide, filled for further construction of the inner layer 13. In order to achieve the desired high thermal conductivity, the powdery material is compressed in the annulus.
- the filled first sleeve 10b is narrowed radially inward by a rolling process, so that with the decreasing outer diameter of the first sleeve, the pulverulent material is compressed and the voids are displaced.
- the first sleeve 10b is preferably at an end face with closed a bottom 27 and is optionally made by deep drawing from a sheet.
- the first sleeve 10b with insulating layer 21 and the inner layer 13 is inserted into a second sleeve 10a or into a wall 10a of the outer layer 10, wherein the wall 10a of the outer layer 10 with a radially inwardly extending helical channel side wall 15 a Channel 12 forms.
- the channel 12 is thus worked on the inside of a wall 10 a of the outer layer 10.
- the first sleeve 10b, together with the second sleeve 10a forms the outer layer 10 with two walls and an intermediate channel 12.
- the channel side wall 15 only has to ensure that the large proportion of the medium flowing through the channel flows completely along the helical shape. Even if the channel side wall 15 does not completely close to the first sleeves 10b, a passage of the channel 12 substantially following the helical shape is still ensured.
- the channel side wall 15 is formed with a small thickness, so that the predominant portion, preferably more than 80%, in particularly advantageous embodiments even more than 90%, of the annular space between the two continuous cylinder walls of the outer layer is occupied by channel regions.
- the channel 12 has a substantially rectangular shape in cross section.
- the annular region between the two sleeves 10b and 10a is sealed at the two front ends of the sleeves 10b and 10a.
- two rings 28 are connected with laser seams tightly with the sleeves 10b and 10a.
- an inlet pipe 18 for a liquid to be heated and at the other end a drain pipe 19 for the heated liquid are formed on the channel 12.
- the inlet pipe 18 and the outlet pipe 19 preferably connect in the radial direction to openings 18a and 19a of the second sleeve 10a.
- the heating coil 3a can have both electrical connections 3 at the same end face of the flow heater 1, one connection 3 leading directly to the proximal end of the heating coil 3a and the other through the insulation layer 21 to the remote end of the heating coil 3a.
- FIGS. 10 to 12 show the structure and elements of another easy-to-produce instantaneous water heater 1.
- a cylindrical bolt of ceramic material is used as the insulating layer 21.
- the heating conductor 3 or resistance heating wire is wound up as a heating coil 3a.
- the insulation layer 21 provided with the heating coil 3a is arranged centrally in a first sleeve 10b made of metal or in a wall 11 of the outer layer 10, and in the annular area between the heating coil 3a and the first sleeve 10b becomes powdery material, preferably magnesium oxide filled further structure of the inner layer 13. In order to achieve the desired high thermal conductivity, the powdery material is compressed in the annulus.
- a second sleeve or a jacket tube 16 of the outer layer 10 is pulled over the first sleeve 10b or over the wall 11 of the outer layer 10, wherein the outer layer 10 forms a channel 12 with a channel side wall 15.
- the channel 12 is worked out on the outside of the wall 11.
- the channel 12 is formed by milling so that at the two end faces of the wall 11, a conclusion is formed, which is tightly connected to the casing tube 16.
- an inlet pipe 18 for a liquid to be heated and at the other end a drain pipe 19 for the heated liquid are formed on the channel 12.
- the inlet pipe 18 and the outlet pipe 19 preferably connect in the radial direction to openings of the jacket pipe 6.
- FIG. 13 shows an embodiment in which the insulation layer 21 has a central bore, through which a fluid line 29 is guided. After the passage of the fluid line 29 through the insulating layer 21, the fluid line 29 is connected to the inlet pipe 18.
- the heating coil has the two electrical connections 3 on each side of the flow heater 1.
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)
- Fluid Mechanics (AREA)
- Computer Hardware Design (AREA)
- Resistance Heating (AREA)
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
Abstract
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH00857/12A CH706695A2 (de) | 2012-06-19 | 2012-06-19 | Durchlauferhitzer. |
PCT/EP2013/062476 WO2013189869A1 (fr) | 2012-06-19 | 2013-06-17 | Chauffe-eau instantané |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2861914A1 true EP2861914A1 (fr) | 2015-04-22 |
EP2861914B1 EP2861914B1 (fr) | 2016-07-13 |
Family
ID=48692445
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13731072.8A Active EP2861914B1 (fr) | 2012-06-19 | 2013-06-17 | Chauffe-eau instantané |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2861914B1 (fr) |
CH (1) | CH706695A2 (fr) |
WO (1) | WO2013189869A1 (fr) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH711968A1 (de) | 2015-12-28 | 2017-06-30 | C3 Casting Competence Center Gmbh | Durchlauferhitzer. |
DE102016124681A1 (de) | 2016-12-16 | 2018-06-21 | Franke Kaffeemaschinen Ag | Getränkevollautomat für frischgebrühte Heißgetränke |
DE102017100154A1 (de) | 2017-01-05 | 2018-07-05 | Franke Kaffeemaschinen Ag | Durchlauferhitzer |
DE102017118598A1 (de) | 2017-08-15 | 2019-02-21 | Franke Kaffeemaschinen Ag | VORRICHTUNG ZUM ZUBEREITEN VON HEIßGETRÄNKEN |
DE102018114576A1 (de) | 2018-06-18 | 2019-12-19 | Franke Kaffeemaschinen Ag | Heißgetränkezubereitungsvorrichtung mit Durchlauferhitzer |
WO2022026477A1 (fr) * | 2020-07-29 | 2022-02-03 | Tom Richards, Inc. | Élément chauffant en ligne |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR515528A (fr) * | 1920-05-15 | 1921-04-02 | Jean Francois Courtillet | Robinet distributeur automatique d'eau chaude par chauffage électrique d'eau courante |
US1595819A (en) * | 1925-06-18 | 1926-08-10 | Ludwig L Bluemlein | Water heater |
FR764978A (fr) * | 1933-12-04 | 1934-05-31 | Chauffe-eau électrique | |
DE1335456U (de) | 1935-04-05 | 1935-04-27 | Siemens-Schuokertwerke | Elektrischer Durchlauferhitser |
FR892465A (fr) * | 1943-01-04 | 1944-04-07 | Dispositif pour chauffage de l'eau sur la canalisation | |
IT1101333B (it) | 1978-12-21 | 1985-09-28 | Nascardi Piero | Caldaietta per macchine da caffe' espresso,ad uso familiare,e uso bar,provvista di un circuito separati,per la produzione di vapore |
DE3542507A1 (de) | 1985-12-02 | 1987-06-04 | Tuerk & Hillinger Gmbh | Elektrischer durchlauferhitzer |
IT1237141B (it) | 1989-11-28 | 1993-05-24 | Macchina professionale per il caffe' espresso per bar | |
DE19829681C1 (de) | 1998-07-03 | 2000-02-17 | Stephan Herrmann | Flüssigkeitserhitzer mit wenigstens einer Heizwendel, welche von Metall umgossen ist |
ITMI20020244U1 (it) | 2002-05-07 | 2003-11-07 | Dalla Corte S R L | Macchina da caffe' espresso con una pluralita' di gruppi erogatori |
DE10322034A1 (de) | 2003-05-16 | 2004-12-02 | Stiebel Eltron Gmbh & Co. Kg | Flüssigkeitserhitzer |
-
2012
- 2012-06-19 CH CH00857/12A patent/CH706695A2/de not_active Application Discontinuation
-
2013
- 2013-06-17 EP EP13731072.8A patent/EP2861914B1/fr active Active
- 2013-06-17 WO PCT/EP2013/062476 patent/WO2013189869A1/fr active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2013189869A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP2861914B1 (fr) | 2016-07-13 |
CH706695A2 (de) | 2013-12-31 |
WO2013189869A1 (fr) | 2013-12-27 |
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