EP2871429A2 - Variable power device for a uniform heating of fluids - Google Patents
Variable power device for a uniform heating of fluids Download PDFInfo
- Publication number
- EP2871429A2 EP2871429A2 EP20140425140 EP14425140A EP2871429A2 EP 2871429 A2 EP2871429 A2 EP 2871429A2 EP 20140425140 EP20140425140 EP 20140425140 EP 14425140 A EP14425140 A EP 14425140A EP 2871429 A2 EP2871429 A2 EP 2871429A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- tube
- fluid
- heat sink
- power device
- variable power
- 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
- 239000012530 fluid Substances 0.000 title claims abstract description 71
- 238000010438 heat treatment Methods 0.000 title claims abstract description 23
- 239000004020 conductor Substances 0.000 claims abstract description 6
- 239000011796 hollow space material Substances 0.000 claims abstract 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 16
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000010137 moulding (plastic) Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/40—Heating elements having the shape of rods or tubes
- H05B3/42—Heating elements having the shape of rods or tubes non-flexible
- H05B3/44—Heating elements having the shape of rods or tubes non-flexible heating conductor arranged within rods or tubes of insulating material
-
- 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
- F24H1/142—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 electric energy supply
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
- H05B2203/021—Heaters specially adapted for heating liquids
Definitions
- the present invention generally relates to a variable power device for a uniform heating of fluids.
- the invention concerns a resistor device which is suitably realized and has a considerable exchange surface with the fluid, so as to obtain an instantaneous and homogeneous heating of the fluid passing within the structure, thus maximizing the load losses and also saving in terms of space and/or dimensions.
- the hot water for sanitary use is normally obtained by passing cold water through a plate heat exchanger, inside which a hot fluid is sent through a secondary circuit of the exchanger, in order to maintain a substantially constant temperature of the fluid at the output.
- the temperature of the output water usually between 55 °C and 60 °C, and, for many applications, it is also preferable to directly heat the output fluid flow, so as to avoid the use of holding tanks.
- the heating fluid which is sent inside the heat exchanger must have a temperature of about 10°C-20°C higher than the predetermined value of temperature of the water coming out from the tap, and because, when the tap is closed, the water contained in the heat exchanger is brought to the temperature of the heating fluid, when the tap is reopened, the output water has, for a certain time interval, a temperature higher by 10°C-20°C than the predetermined value of 55°C-60 °C.
- the present invention is therefore devoted to overcome the above mentioned drawbacks of the prior art and, in particular, the main object of the invention is to provide a variable power device for a uniform heating of fluids, which is configured for instantaneously providing a uniformly heated water flow to one or more users, at a predetermined value of temperature, which is controlled and substantially homogeneous.
- Another object of the invention is to provide a variable power device for a uniform heating of fluids, which can be used together with a heat exchanger, in order to obtain an extremely efficient and compact device, suitable to deliver almost instantaneously a water flow which is always uniformly heated.
- Another object of the invention is to provide a variable power device for a uniform heating of fluids, which is able to obtain a total heat exchange circuit, without the use of any fuel tank and/or fluid container, nor any pipe connection between the resistor device and the heat exchanger, thus limiting the overall dimensions and saving in terms of time and/or of water.
- a further object of the invention is to provide a variable power device for a uniform heating of fluids, which is particularly effective, reliable, convenient and cheap, with respect to the prior art, and which can be used for any new or existing water supply.
- variable power device for a uniform heating of fluids, according to the appended claim 1.
- the device according to the invention allows to quickly heat a fluid flow and to instantly obtain an output flow having a totally controlled and homogeneous temperature, by using a labyrinth-shaped resistor, which works as a heat exchanger within a total heat exchange device; the heat exchange takes place immediately, thus obtaining a consequent and considerable saving in terms of fluid dispensed and of time taken for heating the fluid, with respect to the prior art.
- the device of the invention is usable in particular for supplying hot water, but can be similarly used for any other private and/or industrial use (for example, as a heat exchanger for plastic materials molding machines) for which it is necessary to have a continuous quantity of fluid at a homogeneous and controlled temperature value.
- variable power device for a uniform heating of fluids, according to the invention, and from the enclosed drawings, in which:
- the device essentially comprises an outer tube 10 and a first perforated sink element 13, made of conductive material and preferably aluminum, inside which are inserted, starting from the periphery and proceeding towards the center of the device, a first cavity 11, a resistor 12, which is preferably embedded within an insulating layer made of compressed magnesium oxide, a second cavity 15 and a second heat sink element 16, which is star-shaped and made of a conductive material, such as aluminum.
- the heat sink element 16 can also be missing, in which case it is possible to use a circular end plate which contacts the walls of the cavity 15.
- the tube 10 is connected to a further length of tube 14, by means of a ring nut and/or a special flange, for connecting the 3-phase power cables and the grounding cables 21 and the cables 20 for connecting a possible insulating thermocouple.
- said tube 10 can be coupled with one or more connectors 24 for delivering fluids, for example T-type connectors, and/or with a support base 25 for connecting a thermostat (optional) (the support base 25 is placed in particular on a copper pad in contact with the external heat sink element 13).
- the described structure allows to provide, according to the present invention, a plurality of possible points of temperature control, by using, for example, a safety thermocouple 17, placed on the resistive wire or layer 18, within the resistor 12, and a plurality of containment elements 19 of respective bulbs placed inside the star-shaped heat sink 16, within the resistor 12 and on the external heat sink 13, in contact with the fluid.
- variable power device for a uniform heating of fluids provides firstly the entry of the fluid F1 from a lower side connector 24, the passage of the fluid F1 between the inner walls of the tube 10 and the outer walls of the resistor 12 and, finally, the output of the fluid F1 by an upper connector 26, which is opposite to the tube length 14 carrying the power cables 21.
- the fluid temperature is equal to 200°C or 300°C and the flow rate is over 200 l./min. (so-called “mono-flow” or single circuit).
- said fluid F2 when the fluid F2 enters through a top side connector 24, said fluid F2 takes a first path in a given direction, between the inner walls of the tube 10 and the outer walls of the resistor 12, until the bottom of the pipe 10 which is provided in correspondence of the tube length 14, and, then, a second path, in a direction opposite to the first direction, within the openings or holes 20 provided in the external heat sink element 13, before exiting from the upper connector 26.
- the fluid inlet F3 takes place in correspondence of an upper side connector 24, so that said fluid F3 flows in a first given direction, between the inner walls of the tube 10 and the outer walls of the resistor 12, until the bottom of the tube, then flows in a direction opposite to the above direction, within the openings or holes 20 provided in the resistor 12, up to the other end of the tube, and then again according to the above mentioned first direction, in contact with the central star shaped heat sink element 16, and finally goes out from a central conduit 22 connected to a lower side connector 24.
- the peculiarity of the heating device for fluids of the present invention is constituted by the fact that the resistor 12 does not contact the fluid, but it directly contacts the external heat sink 13 and the central heat sink 16 (optional); this means that the heat is distributed by the heat sink element 13, 16 to the fluid in correspondence with a very large surface, while the heat sink element 13, 16 also maintains a low temperature at the surface which contacts the fluid.
- the device of the present invention is therefore a temperature "calibrator" and is able to cause high savings of time (so that the fluid can reach a given and controlled temperature value) and of fluid, since it is not necessary to use a containment tank for collecting the fluid to be heated.
- the structural composition of the device allows to avoid the complete destruction of the resistor even when an interruption of the fluid flow occurs, because the metal mass of the external structure is intimately attached to the annular resistor 12.
- the resistive structure thus obtained may also be advantageously coupled with a suitable heat exchanger for applications which require an electric heating together with an effective heat dissipation (such as, for example, the temperature control units of the plastic molding machines); in this case, the tube 10 is inserted inside a shaped container or packaging, which is preferably made of stainless steel, by means of a prismatic block and a fixing flange.
- a suitable heat exchanger for applications which require an electric heating together with an effective heat dissipation (such as, for example, the temperature control units of the plastic molding machines); in this case, the tube 10 is inserted inside a shaped container or packaging, which is preferably made of stainless steel, by means of a prismatic block and a fixing flange.
- the external heat sink 13 can be formed by a tube bundle that includes a plurality of hollow sections (the cavities of the hollow sections identify and constitute the above mentioned openings 20) and each of said hollow sections has a same predetermined section, such as a circular, rectangular or squared section; in particular, each of said hollow sections has a trapezoidal section and is laterally placed next to one another so as to obtain a maximum contact surface.
- the internal heat sink 16 can also be constituted by a tube bundle, which includes a plurality of hollow sections having the same characteristics as those mentioned in the case of the external heat sink 13; as already mentioned, the internal heat sink 16 and, therefore, its tube bundle can also be missed, in which case a cover cap or plug is provided on the bottom of the structure.
- variable power device which is the object of the present invention, are therefore clear from the above description, as well as the related advantages.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
- Resistance Heating (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
Description
- The present invention generally relates to a variable power device for a uniform heating of fluids.
- More particularly, the invention concerns a resistor device which is suitably realized and has a considerable exchange surface with the fluid, so as to obtain an instantaneous and homogeneous heating of the fluid passing within the structure, thus maximizing the load losses and also saving in terms of space and/or dimensions.
- The hot water for sanitary use is normally obtained by passing cold water through a plate heat exchanger, inside which a hot fluid is sent through a secondary circuit of the exchanger, in order to maintain a substantially constant temperature of the fluid at the output.
- In fact, for such sanitary uses, it is preferable to maintain the temperature of the output water usually between 55 °C and 60 °C, and, for many applications, it is also preferable to directly heat the output fluid flow, so as to avoid the use of holding tanks.
- As previously mentioned, the use of plate heat exchangers makes it possible to obtain a heat exchange rather efficient and allows to provide a considerable amount of hot fluid, however employing a minimal amount of fluid that is stored inside the heat exchanger.
- However, one of the major drawbacks in the use of heat exchangers for supplying fluids and, in particular, for supplying hot water is the fact that for each new opening of the tap the water comes out, for a certain period of time, at a temperature substantially higher than the predetermined value, and this drawback can constitute a danger for the user.
- This is because the heating fluid which is sent inside the heat exchanger must have a temperature of about 10°C-20°C higher than the predetermined value of temperature of the water coming out from the tap, and because, when the tap is closed, the water contained in the heat exchanger is brought to the temperature of the heating fluid, when the tap is reopened, the output water has, for a certain time interval, a temperature higher by 10°C-20°C than the predetermined value of 55°C-60 °C.
- This drawback can be limited by using a hot water tank or container (such as a pipe) placed between the heat exchanger and the tap; however, said pipe is rather cumbersome and has substantially high production costs, which would be advisable to reduce or eliminate.
- Moreover, when said tank or pipe is used, the water which comes to the tap, when said tap is opened and after a certain period of time since the last drawing of hot water, will be substantially cold.
- The present invention is therefore devoted to overcome the above mentioned drawbacks of the prior art and, in particular, the main object of the invention is to provide a variable power device for a uniform heating of fluids, which is configured for instantaneously providing a uniformly heated water flow to one or more users, at a predetermined value of temperature, which is controlled and substantially homogeneous.
- Another object of the invention is to provide a variable power device for a uniform heating of fluids, which can be used together with a heat exchanger, in order to obtain an extremely efficient and compact device, suitable to deliver almost instantaneously a water flow which is always uniformly heated.
- Another object of the invention is to provide a variable power device for a uniform heating of fluids, which is able to obtain a total heat exchange circuit, without the use of any fuel tank and/or fluid container, nor any pipe connection between the resistor device and the heat exchanger, thus limiting the overall dimensions and saving in terms of time and/or of water. A further object of the invention is to provide a variable power device for a uniform heating of fluids, which is particularly effective, reliable, convenient and cheap, with respect to the prior art, and which can be used for any new or existing water supply.
- The above mentioned objects and other objects are achieved by a variable power device for a uniform heating of fluids, according to the appended claim 1.
- Further detailed technical features of the device of the invention are given in the dependent claims.
- Advantageously, the device according to the invention allows to quickly heat a fluid flow and to instantly obtain an output flow having a totally controlled and homogeneous temperature, by using a labyrinth-shaped resistor, which works as a heat exchanger within a total heat exchange device; the heat exchange takes place immediately, thus obtaining a consequent and considerable saving in terms of fluid dispensed and of time taken for heating the fluid, with respect to the prior art.
- Furthermore, it is not necessary to use tanks and/or containers for storing the fluid to be heated, nor piping particularly long and/or bulky.
- Finally, the device of the invention is usable in particular for supplying hot water, but can be similarly used for any other private and/or industrial use (for example, as a heat exchanger for plastic materials molding machines) for which it is necessary to have a continuous quantity of fluid at a homogeneous and controlled temperature value.
- Further objects and advantages of the present invention will become more clear from the following description, relating to a preferred embodiment of the variable power device for a uniform heating of fluids, according to the invention, and from the enclosed drawings, in which:
-
figure 1 shows a schematic side view of a first embodiment of the variable power device for a uniform heating of fluids, according to the present invention; -
figure 2 shows a schematic side view of a second embodiment of the variable power device for a uniform heating of fluids, according to the present invention; -
figure 3 shows a schematic side view of a third embodiment of the variable power device for a uniform heating of fluids, according to the present invention; -
figure 4 is a partial perspective and exploded view of a technical detail of the variable power device for a uniform heating of fluids, according to the present invention; -
figure 5 is a schematic longitudinal section view of the variable power device for a uniform heating of fluids offigure 2 , according to the present invention; -
figure 6 is a schematic sectional view taken along the line VI-VI offigure 5 ; -
figure 7 is a partial side view of a further embodiment of the variable power device for a uniform heating of fluids, according to the present invention; -
figure 8 is a top view of the variable power device for a uniform heating of fluids offigure 7 , according to the present invention. - With reference to the mentioned figures, the device according to the invention essentially comprises an
outer tube 10 and a first perforatedsink element 13, made of conductive material and preferably aluminum, inside which are inserted, starting from the periphery and proceeding towards the center of the device, afirst cavity 11, aresistor 12, which is preferably embedded within an insulating layer made of compressed magnesium oxide, asecond cavity 15 and a secondheat sink element 16, which is star-shaped and made of a conductive material, such as aluminum. - The
heat sink element 16 can also be missing, in which case it is possible to use a circular end plate which contacts the walls of thecavity 15. - The
tube 10 is connected to a further length oftube 14, by means of a ring nut and/or a special flange, for connecting the 3-phase power cables and thegrounding cables 21 and thecables 20 for connecting a possible insulating thermocouple. - Furthermore, said
tube 10 can be coupled with one ormore connectors 24 for delivering fluids, for example T-type connectors, and/or with asupport base 25 for connecting a thermostat (optional) (thesupport base 25 is placed in particular on a copper pad in contact with the external heat sink element 13). - The described structure allows to provide, according to the present invention, a plurality of possible points of temperature control, by using, for example, a
safety thermocouple 17, placed on the resistive wire orlayer 18, within theresistor 12, and a plurality ofcontainment elements 19 of respective bulbs placed inside the star-shaped heat sink 16, within theresistor 12 and on theexternal heat sink 13, in contact with the fluid. - In particular, depending on the application, the variable power device for a uniform heating of fluids, according to the present invention, provides firstly the entry of the fluid F1 from a
lower side connector 24, the passage of the fluid F1 between the inner walls of thetube 10 and the outer walls of theresistor 12 and, finally, the output of the fluid F1 by anupper connector 26, which is opposite to thetube length 14 carrying thepower cables 21. - In this case (shown in detail in the attached
figure 1 ), the fluid temperature is equal to 200°C or 300°C and the flow rate is over 200 l./min. (so-called "mono-flow" or single circuit). - Alternatively, when the fluid F2 enters through a
top side connector 24, said fluid F2 takes a first path in a given direction, between the inner walls of thetube 10 and the outer walls of theresistor 12, until the bottom of thepipe 10 which is provided in correspondence of thetube length 14, and, then, a second path, in a direction opposite to the first direction, within the openings orholes 20 provided in the externalheat sink element 13, before exiting from theupper connector 26. - In this case (shown in detail in the appended
figures 2 and5 ), it is possible to reach fluid temperatures of 200°C or 300 °C and flow rates from 100 to 200 l./min. (so-called "bi-flow" or double circuit), with the further possibility of having a modulated double power. - Still alternatively, it is possible to provide that the fluid inlet F3 takes place in correspondence of an
upper side connector 24, so that said fluid F3 flows in a first given direction, between the inner walls of thetube 10 and the outer walls of theresistor 12, until the bottom of the tube, then flows in a direction opposite to the above direction, within the openings orholes 20 provided in theresistor 12, up to the other end of the tube, and then again according to the above mentioned first direction, in contact with the central star shapedheat sink element 16, and finally goes out from acentral conduit 22 connected to alower side connector 24. - In the latter case (shown in detail in the appended
figure 3 ), it is possible to reach a fluid temperature of 200°C and flow rates of 90 l./min. (so-called "tri-flow" circuit or triple). - As clearly shown in the enclosed
figure 4 , the peculiarity of the heating device for fluids of the present invention is constituted by the fact that theresistor 12 does not contact the fluid, but it directly contacts theexternal heat sink 13 and the central heat sink 16 (optional); this means that the heat is distributed by theheat sink element heat sink element - Therefore, an extended heat exchange surface is obtained, thus maximizing the pressure drop and maintaining a compact size of the structure, while avoiding, at the same time, a direct contact between the fluid and the
resistor 12. - This allows to bring the entire amount of the fluid, almost immediately, at a predetermined temperature value (determined by the power of the resistor 12), which is homogeneous and controlled, and to obtain an output flow which is always uniformly heated.
- The device of the present invention is therefore a temperature "calibrator" and is able to cause high savings of time (so that the fluid can reach a given and controlled temperature value) and of fluid, since it is not necessary to use a containment tank for collecting the fluid to be heated. Finally, the structural composition of the device allows to avoid the complete destruction of the resistor even when an interruption of the fluid flow occurs, because the metal mass of the external structure is intimately attached to the
annular resistor 12. - The resistive structure thus obtained may also be advantageously coupled with a suitable heat exchanger for applications which require an electric heating together with an effective heat dissipation (such as, for example, the temperature control units of the plastic molding machines); in this case, the
tube 10 is inserted inside a shaped container or packaging, which is preferably made of stainless steel, by means of a prismatic block and a fixing flange. - According to a further embodiment of the present invention, which is shown in particular in the enclosed
figures 7 and 8 , theexternal heat sink 13 can be formed by a tube bundle that includes a plurality of hollow sections (the cavities of the hollow sections identify and constitute the above mentioned openings 20) and each of said hollow sections has a same predetermined section, such as a circular, rectangular or squared section; in particular, each of said hollow sections has a trapezoidal section and is laterally placed next to one another so as to obtain a maximum contact surface. - Finally, always according to the above mentioned embodiment of the invention, the
internal heat sink 16 can also be constituted by a tube bundle, which includes a plurality of hollow sections having the same characteristics as those mentioned in the case of theexternal heat sink 13; as already mentioned, theinternal heat sink 16 and, therefore, its tube bundle can also be missed, in which case a cover cap or plug is provided on the bottom of the structure. - The technical features of the variable power device, which is the object of the present invention, are therefore clear from the above description, as well as the related advantages.
- It is also clear that many other variations may be made to the device of the invention, without departing from the principles of novelty and inventive step according to the appended claims, as well as it is clear that the materials, forms and dimensions of the technical details, as shown and described, may be any according to requirements and that they can be replaced with other equivalents.
Claims (10)
- Variable power device for a uniform heating of fluids, characterized in that said device comprises an outer tube (10), which is connected to a fitting or flange (14) for connecting the power supply and grounding cables (21) and to one or more fluid distribution connectors (24, 26), said outer tube (10) enclosing a first drilled heat sink (13), made of conductive material, within which a first hollow space (11) and a wire-type or layer-type resistive element (12), embedded within an insulating layer, are inserted, wherein said resistive element (12), which is not directly in contact with the fluid, directly contacts said first heat sink (13), in order to distribute heat from said first heat sink (13) to the fluid in correspondence with a large surface, said first heat sink (13) also maintaining a low temperature at the fluid contact surface.
- Variable power device as claimed in claim 1, characterized in that a second hollow space (15) is provided close to said resistive element (12) and at least one second heat sink (16), made of a conductive material, or a cap or stopper, placed into contact with the walls of said second hollow space (15), is provided inside the tube (10).
- Variable power device as claimed in at least one of the preceding claims, characterized in that said tube (10) is connected to at least one support base (25) of at least one thermostat, said base (25) being placed on a pad of conductive material which contacts said first heat sink (13).
- Variable power device as claimed in at least one of the preceding claims, characterized in that at least a safety thermocouple (17) is placed on a resistive wire or layer (18) of said wire-type or layer-type resistive element (12).
- Variable power device as claimed in at least one of the preceding claims, characterized in that a plurality of casings (19) containing respective bulbs for a temperature control are placed within said second heat sink (16), within said resistive element (12) and on said first heat sink (13) and within the fluid.
- Variable power device as claimed in at least one of the preceding claims, characterized in that said fluid (F1) flows within said tube (10) through one of said distribution connectors (24, 26) and between the inner walls of said tube (10) and the outer walls of said resistive element (12), said fluid exiting from said tube (10) through the distribution connectors (24, 26).
- Variable power device as claimed in at least one of the preceding claims, characterized in that said fluid (F2) flows within said tube (10) through one of said distribution connectors (24, 26) and flows at first between the inner walls of said tube (10) and the outer walls of said resistive element (12) according to a first direction and up to a first end portion of the tube (10) and then flows according to a second direction, opposite to said first direction, and through openings or holes (20) provided on said first heat sink (13), said fluid finally exiting from said tube (10) through one of said distribution connectors (24, 26).
- Variable power device as claimed in at least one of the preceding claims, characterized in that said fluid (F3) flows within the tube (10) through one of said distribution connectors (24, 26) and flows at first between the inner walls of said tube (10) and the outer walls of said resistive element (12) according to a first direction and up to a first end portion of the tube (10) and then flows according to a second direction, opposite to said first direction, up to a second end portion of the tube (10), which is opposite to said first end portion of the tube (10), said fluid flowing again according to said first direction and in contact with said second heat sink (16) and finally exiting from said tube (10) through a central duct (22) which is connected to one of said distribution connectors (24, 26).
- Variable power device as claimed in at least one of the preceding claims, characterized in that said first heat sink (13) is constituted by a tube bundle, which includes a plurality of hollow sections, each of which has the same prefixed section and, in particular, a trapezoidal section, so that said sections laterally adhere one to each other, thus obtaining a large contact area.
- Variable power device as claimed in at least one of the preceding claims, characterized in that said second heat sink (16) is constituted by a tube bundle, which includes a plurality of hollow sections, each of which has the same prefixed section and, in particular, a trapezoidal section, so that said sections laterally adhere one to each other, thus obtaining a large contact area.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT000271A ITVI20130271A1 (en) | 2013-11-08 | 2013-11-08 | VARIABLE POWER DEVICE FOR HOMOGENEOUS HEATING OF FLUIDS |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2871429A2 true EP2871429A2 (en) | 2015-05-13 |
EP2871429A3 EP2871429A3 (en) | 2015-07-29 |
EP2871429B1 EP2871429B1 (en) | 2016-07-20 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14425140.2A Active EP2871429B1 (en) | 2013-11-08 | 2014-11-03 | Variable power device for a uniform heating of fluids |
Country Status (2)
Country | Link |
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EP (1) | EP2871429B1 (en) |
IT (1) | ITVI20130271A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105650854A (en) * | 2016-03-23 | 2016-06-08 | 陈朋 | Circular heating pipe |
CN107270018A (en) * | 2016-02-14 | 2017-10-20 | 蒋春花 | Connect and equip for large-scale smart city industrial building frost-cracking-preventing intelligent pipeline |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR515528A (en) * | 1920-05-15 | 1921-04-02 | Jean Francois Courtillet | Automatic hot water dispenser tap by electric running water heater |
US4835365A (en) * | 1986-09-29 | 1989-05-30 | Etheridge David R | De-ionized fluid heater and control system |
US5265318A (en) * | 1991-06-02 | 1993-11-30 | Shero William K | Method for forming an in-line water heater having a spirally configured heat exchanger |
US7190893B2 (en) * | 2003-06-27 | 2007-03-13 | Valeo Electrical Systems, Inc. | Fluid heater with low porosity thermal mass |
DE202005017693U1 (en) * | 2005-11-11 | 2006-02-23 | Ko, Hao-Chih, Linkou Shiang | Heater structure for liquids e.g. refrigerant, has electric plug inserted into central channel of heater body via central opening of one of end plates at both ends of body |
-
2013
- 2013-11-08 IT IT000271A patent/ITVI20130271A1/en unknown
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2014
- 2014-11-03 EP EP14425140.2A patent/EP2871429B1/en active Active
Non-Patent Citations (1)
Title |
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None |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107270018A (en) * | 2016-02-14 | 2017-10-20 | 蒋春花 | Connect and equip for large-scale smart city industrial building frost-cracking-preventing intelligent pipeline |
CN107270018B (en) * | 2016-02-14 | 2018-11-27 | 重庆揽诚建筑工程有限公司 | It connects and equips for large-scale smart city industrial building frost-cracking-preventing intelligent pipeline |
CN105650854A (en) * | 2016-03-23 | 2016-06-08 | 陈朋 | Circular heating pipe |
CN105650854B (en) * | 2016-03-23 | 2018-09-25 | 陈朋 | Circulating-heating pipe |
Also Published As
Publication number | Publication date |
---|---|
EP2871429B1 (en) | 2016-07-20 |
EP2871429A3 (en) | 2015-07-29 |
ITVI20130271A1 (en) | 2015-05-09 |
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