EP1655546A1 - Heating group for diathermic fluid radiant elements - Google Patents
Heating group for diathermic fluid radiant elements Download PDFInfo
- Publication number
- EP1655546A1 EP1655546A1 EP04106370A EP04106370A EP1655546A1 EP 1655546 A1 EP1655546 A1 EP 1655546A1 EP 04106370 A EP04106370 A EP 04106370A EP 04106370 A EP04106370 A EP 04106370A EP 1655546 A1 EP1655546 A1 EP 1655546A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- thermo
- heating group
- solid
- state switch
- conductive
- 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.)
- Withdrawn
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 39
- 239000012530 fluid Substances 0.000 title claims abstract description 16
- 230000001464 adherent effect Effects 0.000 claims abstract description 4
- 239000003989 dielectric material Substances 0.000 claims abstract description 4
- 239000011347 resin Substances 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- 239000007769 metal material Substances 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 claims 1
- 239000004020 conductor Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 239000006185 dispersion Substances 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 2
- 230000005662 electromechanics Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001010 compromised effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- H05B3/02—Details
- H05B3/06—Heater elements structurally combined with coupling elements or holders
- H05B3/08—Heater elements structurally combined with coupling elements or holders having electric connections specially adapted for high temperatures
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- 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
- F24H15/407—Control of fluid heaters characterised by the type of controllers using electrical switching, e.g. TRIAC
-
- 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
- F24H9/2064—Arrangement or mounting of control or safety devices for air heaters
- F24H9/2071—Arrangement or mounting of control or safety devices for air heaters using electrical 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
- 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
- F24H3/00—Air heaters
- F24H3/002—Air heaters using electric energy supply
- F24H3/004—Air heaters using electric energy supply with a closed circuit for a heat transfer liquid
Definitions
- the present invention is about a heating group for diathermic fluid radiant elements, in particular radiators and towel heaters especially for domestic use.
- a radiator or a towel heater of known type comprises a heating group consisting of a tubular body inserted in the radiant element and put in contact with the diathermic fluid, which contains an insulating material in which one or more electric resistances are inserted.
- the tubular body is provided at one end with a tubular sleeve for the fastening to the radiant element, and through it they pass conductive elements for the connection of the electric resistance to a feeding group, which is housed in a box fixed to the radiant element.
- the feeding group comprises a solid-state switch, generally a bidirectional thyristor commonly called TRIAC or SCR, connected to electronic control means which set its switching on and switching off.
- a solid-state switch generally a bidirectional thyristor commonly called TRIAC or SCR
- the thyristor cooling is particularly difficult, since the box in which it is contained is closed to avoid the entrance of humidity or water.
- the considerable heat produced by the thyristor makes the temperature inside the box to increase, and this can compromise the correct operation of the electronic components.
- the present invention intends to overcome the aforementioned inconveniences.
- the heating group of the invention maintains at least the same electric safety standards found in the prior art heating groups.
- a heating group for diathermic fluid radiant elements which, according to the main claim, comprises:
- the solid-state switch is a bidirectional thyristor coupled with a support base incorporated in the thermo-conductive core.
- First terminals for the connection to the electric resistance, second terminals for the connection to the distribution power grid and third terminals for the connection to the electronic control means of the thyristor are present in the support base.
- the support base comprises a printed circuit consisting of conductive stripes to connect the solid-state switch to the connection terminals.
- the solid-state switch is incorporated in the thermo-conductive core, being connected in the air to the electric resistance, to the distribution power grid and to the electronic control means.
- the heating group also comprises a resistive protection element with positive temperature coefficient, commonly called PTC (Positive Temperature Control), which is connected in series between the solid-state switch and the electronic control means which control its switching on and switching off.
- PTC Positive Temperature Control
- the heating group of the invention is more reliable with respect to the known heating groups, since the thermal dispersion that the thyristor carries out inside the sleeve that houses it is greater than that achievable in known embodiments, in which the thermal exchange takes place directly in the air or by means of heat sinks.
- the heating group of the invention is also more reliable in its operation with respect to the equivalent heating groups of known type.
- the presence of the resistive element with positive temperature coefficient warrants an effective protection against the electric resistance burnout, especially in case of the specific load on the resistance is raised beyond unacceptable values for a lack of contact with the diathermic fluid.
- the heating group of the invention is shown in Figures 1 to 4, where it is generally indicated with numeral 1.
- heating group of the invention could be also applied to fixed or mobile radiant element of other kind.
- the heating group 1 comprises a heater 2 of known type, which is inserted in a housing 3 present in the radiant element A, B and which, as one can see in greater detail in Figure 5, is composed by a tubular body 4 put in contact with the diathermic fluid, said body containing an electric insulator 4a in which an electric resistance, schematically shown in Figure 5 and indicated with numeral 5 , is inserted.
- thermo-fuse 5a and a protective electro mechanic thermostat 5b disposed inside the tubular body 4, are coupled with the resistance 5.
- a tubular sleeve is disposed at the end of the tubular body 4 and it is provided with fastening means consisting, for example, of a threaded collar 6a which is screwed to the radiant element.
- the fastening means could also be of other kind, like for instance screws.
- the heating group 1 also comprises a feeding group, generally indicated with numeral 7 and shown in axonometric view in Figure 6, provided with a solid-state switch 8 for the connection of the electric resistance 5 to a distribution power grid 9 according to the electric diagram of Figure 10.
- Electronic control means generally indicated with numeral 10 and shown in the electric diagram of Figure 10, are present too for switching off and switching on the switch 8.
- the solid-state switch 8 is disposed inside the sleeve 6, where it is contained in a thermo-conductive core 11 adherent to the inner wall 6a of the sleeve 6.
- the solid-state switch 8 is coupled with a support base 12, which is incorporated in the thermo-conductive core 11 and on which are present:
- the support base 12 comprises conductive stripes 16 to connect the solid-state switch 8 to the connection terminals 13, 14 and 15 which are completely immersed in the thermo-conductive core 11 after the support base 12 has been inserted in the tubular sleeve 6.
- thermo-conductive core 11 comprises a first thermo-conductive body 17 with a circular sector cross section, made of metallic material, and a second thermo-conductive body 18, made of thermo-conductive resin, between which the support base 12 is present, as one can see in detail in Figure 6.
- the manufacturing process provides for the assembly of the solid state switch 8 on the support base 12 and the connection of the terminals to the respective wires, and thus the fastening of the base 12 to the first thermo-conductive body 17 through fastening means.
- the support base 12 together with the thermo-conductor 17, is inserted in the tubular sleeve 6.
- thermo-conductive resin the space inside the sleeve 6 comprised between the support base 12 and the inner surface 6a of the sleeve 6 is filled with thermo-conductive resin, obtaining the second thermo-conductive body 18 shown in Figure 6a.
- thermo-conductive core 11 perfectly adheres with interference to the inner surface 6a of the sleeve 6 , providing for the connection stability of the support base 12 and all the components associated therewith inside the tubular sleeve 6.
- thermo-conductive core 11 The perfect adhesion of the thermo-conductive core 11 to the inner surface 6a of the sleeve 6 enhances the thermal exchange and assures the operation of the solid-state switch 8 at an optimal constant temperature, comprised between 70°C and 80°C, thus considerably below the dangerous threshold of 100°C.
- FIG. 7 and 7a A different executive embodiment of the invention is shown in Figures 7 and 7a, which is different from that previously described in that the support base 12 of the solid-state switch 8 and the terminals 13, 14 and 15 is incorporated in a single thermo-conductive body, generally indicated with numeral 19, which is obtained injecting thermo-conductive resin inside the sleeve 6 after the insertion of the support base 12, centred on the sleeve 6.
- FIG. 8 and 8a Another executive embodiment is shown in Figures 8 and 8a, and it differs from those previously described in that the solid-state switch 8 is assembled in the air directly to the conductors 13a for the connection to the electric resistance 5, to the conductors 14a for the connection to the distribution power grid 9 and to the conductor 15a for the connection to the electronic control means 10.
- thermo-conductive core generally indicated with numeral 20, which is obtained injecting thermo-conductive resin inside the sleeve 6 after the interposition of an insulating ring 21 circumferentially close to the inner surface 6a of said sleeve 6.
- the resistive element 22 is connected in series between the solid-state switch 8 and the electronic control means 10 which control its switching on and switching off.
- the heating group of the invention could be applied to radiant elements of any kind, both of fixed installation and of mobile installation.
- thermo-conductive materials used could be of any kind, as long as thermo-conductive and thus able to provide for an optimal dispersion of the heat produced by the solid-state switch during operation.
- said switch could be a thyristor of TRIAC or SCR type.
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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)
- Resistance Heating (AREA)
Abstract
Description
- The present invention is about a heating group for diathermic fluid radiant elements, in particular radiators and towel heaters especially for domestic use.
- It is known that, in the electric radiators used to heat rooms or napkins and towels, the heat is supplied by proper heating groups which comprise a heater inserted in the radiant element and fed by electric current through a feeding group.
- In particular, a radiator or a towel heater of known type comprises a heating group consisting of a tubular body inserted in the radiant element and put in contact with the diathermic fluid, which contains an insulating material in which one or more electric resistances are inserted.
- The tubular body is provided at one end with a tubular sleeve for the fastening to the radiant element, and through it they pass conductive elements for the connection of the electric resistance to a feeding group, which is housed in a box fixed to the radiant element.
- In particular, the feeding group, according to the prior art, comprises a solid-state switch, generally a bidirectional thyristor commonly called TRIAC or SCR, connected to electronic control means which set its switching on and switching off.
- In all known embodiments, the thyristor cooling is particularly difficult, since the box in which it is contained is closed to avoid the entrance of humidity or water. The considerable heat produced by the thyristor makes the temperature inside the box to increase, and this can compromise the correct operation of the electronic components.
- In particular, if the temperature exceeds 100°C, the operation of the thyristor itself is compromised.
- The use of heat sinks applied to the box in which the thyristor is contained does not solve the problem in a satisfactory way and makes also more complex the manufacturing of the whole heating group.
- Another inconvenience found in known embodiments is due to the fact that the electric resistance undergoes damages, sometimes irreparable, when a good contact between the diathermic fluid and the heater is not carried out, since the resistance operates partially in contact with air and this increases the specific load which causes its burnout.
- The present invention intends to overcome the aforementioned inconveniences.
- In particular, it is a first object of the invention to provide for a heating group for diathermic fluid radiant elements in which, during operation, the temperature of the solid-state switch, which fits out the resistance feeding group, is constantly below the highest allowed temperature.
- It is another object that said temperature value is maintained without requiring heat sinks.
- It is a further object to reduce the possibility that the resistance is burned out in case of failed contact between the heating element and the diathermic fluid.
- Not the least object is that the heating group of the invention maintains at least the same electric safety standards found in the prior art heating groups.
- Said objects are obtained by a heating group for diathermic fluid radiant elements which, according to the main claim, comprises:
- a heater inserted in a housing present in said radiant element and put in contact with said diathermic fluid, said heater consisting of a tubular body containing an electric insulator in which at least an electric resistance is inserted;
- a tubular sleeve disposed at one end of said tubular body and provided with fastening means to said radiant element;
- a feeding group of said heater, comprising at least a solid-state switch able to connect said electric resistance to a distribution power grid;
- electronic control means for switching off and switching on said switch, and it is characterized in that said solid-state switch is disposed in said sleeve where it is incorporated in a thermo-conductive core adherent to the inner wall of said sleeve.
- According to a preferred executive embodiment, the solid-state switch is a bidirectional thyristor coupled with a support base incorporated in the thermo-conductive core.
- First terminals for the connection to the electric resistance, second terminals for the connection to the distribution power grid and third terminals for the connection to the electronic control means of the thyristor are present in the support base.
- The support base comprises a printed circuit consisting of conductive stripes to connect the solid-state switch to the connection terminals.
- According to an executive embodiment, the solid-state switch is incorporated in the thermo-conductive core, being connected in the air to the electric resistance, to the distribution power grid and to the electronic control means.
- Preferably, the heating group also comprises a resistive protection element with positive temperature coefficient, commonly called PTC (Positive Temperature Control), which is connected in series between the solid-state switch and the electronic control means which control its switching on and switching off.
- Advantageously, the heating group of the invention is more reliable with respect to the known heating groups, since the thermal dispersion that the thyristor carries out inside the sleeve that houses it is greater than that achievable in known embodiments, in which the thermal exchange takes place directly in the air or by means of heat sinks.
- Consequently, and in a still advantageous way, the heating group of the invention is also more reliable in its operation with respect to the equivalent heating groups of known type.
- Furthermore advantageously, the presence of the resistive element with positive temperature coefficient warrants an effective protection against the electric resistance burnout, especially in case of the specific load on the resistance is raised beyond unacceptable values for a lack of contact with the diathermic fluid.
- The aforesaid objects and advantages will be better highlighted in the description of preferred executive embodiments of the invention, given in an explanatory but not limiting way hereinafter, with reference to the figures of the annexed drawings, wherein:
- Figures 1 and 2 show two different views of a radiator to which the heating group of the invention is applied;
- Figures 3 and 4 show two different views of a towel heater to which the heating group of the invention is applied;
- Figure 5 shows a detail of the heating group of the invention shown in Figures 1 to 4;
- Figure 6 is an axonometric exploded view of a detail of Figure 5;
- Figure 6a is a front view of the detail of figure 6 in assembled configuration;
- Figure 7 is a different executive embodiment of the detail of Figure 6;
- Figure 7a is a front view of the detail of figure 7 in assembled configuration;
- Figure 8 is another executive embodiment of the detail of Figure 6;
- Figure 8a is a front view of the detail of figure 8 in assembled configuration;
- Figure 9 is a further executive embodiment of the detail of Figure 6;
- Figure 10 shows the electric diagram of the heating group of the invention for any of the executive embodiments of Figures 6 to 8; and
- Figure 11 shows an executive embodiment of the electric diagram of Figure 10.
- The heating group of the invention is shown in Figures 1 to 4, where it is generally indicated with numeral 1.
- In particular, in Figures 1 and 2 said group is applied to a diathermic fluid radiator, generally indicated with A, while in Figures 3 and 4 it is applied to a towel heater, with diathermic fluid too, generally indicated with B.
- It is evident that the heating group of the invention could be also applied to fixed or mobile radiant element of other kind.
- One can see that the heating group 1 comprises a
heater 2 of known type, which is inserted in ahousing 3 present in the radiant element A, B and which, as one can see in greater detail in Figure 5, is composed by a tubular body 4 put in contact with the diathermic fluid, said body containing an electric insulator 4a in which an electric resistance, schematically shown in Figure 5 and indicated with numeral 5, is inserted. - It is pointed out that also several electric resistances could be housed inside the tubular body 4.
- According to the prior art, a thermo-
fuse 5a and a protective electromechanic thermostat 5b, disposed inside the tubular body 4, are coupled with the resistance 5. - A tubular sleeve, generally indicated with
numeral 6, is disposed at the end of the tubular body 4 and it is provided with fastening means consisting, for example, of a threadedcollar 6a which is screwed to the radiant element. - In other executive embodiments, the fastening means could also be of other kind, like for instance screws.
- The heating group 1 also comprises a feeding group, generally indicated with numeral 7 and shown in axonometric view in Figure 6, provided with a solid-
state switch 8 for the connection of the electric resistance 5 to a distribution power grid 9 according to the electric diagram of Figure 10. - Electronic control means, generally indicated with
numeral 10 and shown in the electric diagram of Figure 10, are present too for switching off and switching on theswitch 8. - According to the invention, the solid-
state switch 8 is disposed inside thesleeve 6, where it is contained in a thermo-conductive core 11 adherent to theinner wall 6a of thesleeve 6. - According to the executive embodiment shown in Figures 6 and 6a, and with reference to the electric diagram of Figure 10, the solid-
state switch 8 is coupled with asupport base 12, which is incorporated in the thermo-conductive core 11 and on which are present: -
first terminals 13 andrespective conductors 13a for the connection to the electric resistance 5; -
second terminals 14 andrespective conductors 14a for the connection to the distribution power grid 9; -
third terminals 15 andrespective conductors 15a for the connection to the electronic control means 10 for switching on and switching off theswitch 8. - The
support base 12 comprisesconductive stripes 16 to connect the solid-state switch 8 to theconnection terminals conductive core 11 after thesupport base 12 has been inserted in thetubular sleeve 6. - In particular, one can see in Figures 6 and 6a that the thermo-
conductive core 11 comprises a first thermo-conductive body 17 with a circular sector cross section, made of metallic material, and a second thermo-conductive body 18, made of thermo-conductive resin, between which thesupport base 12 is present, as one can see in detail in Figure 6. - Operatively, the manufacturing process provides for the assembly of the
solid state switch 8 on thesupport base 12 and the connection of the terminals to the respective wires, and thus the fastening of thebase 12 to the first thermo-conductive body 17 through fastening means. - Once the fastening is performed, the
support base 12, together with the thermo-conductor 17, is inserted in thetubular sleeve 6. - Then, the space inside the
sleeve 6 comprised between thesupport base 12 and theinner surface 6a of thesleeve 6 is filled with thermo-conductive resin, obtaining the second thermo-conductive body 18 shown in Figure 6a. - In this way, the so obtained thermo-
conductive core 11 perfectly adheres with interference to theinner surface 6a of thesleeve 6, providing for the connection stability of thesupport base 12 and all the components associated therewith inside thetubular sleeve 6. - The perfect adhesion of the thermo-
conductive core 11 to theinner surface 6a of thesleeve 6 enhances the thermal exchange and assures the operation of the solid-state switch 8 at an optimal constant temperature, comprised between 70°C and 80°C, thus considerably below the dangerous threshold of 100°C. - A different executive embodiment of the invention is shown in Figures 7 and 7a, which is different from that previously described in that the
support base 12 of the solid-state switch 8 and theterminals numeral 19, which is obtained injecting thermo-conductive resin inside thesleeve 6 after the insertion of thesupport base 12, centred on thesleeve 6. - Another executive embodiment is shown in Figures 8 and 8a, and it differs from those previously described in that the solid-
state switch 8 is assembled in the air directly to theconductors 13a for the connection to the electric resistance 5, to theconductors 14a for the connection to the distribution power grid 9 and to theconductor 15a for the connection to the electronic control means 10. - Said switch is incorporated in a thermo-conductive core, generally indicated with
numeral 20, which is obtained injecting thermo-conductive resin inside thesleeve 6 after the interposition of an insulatingring 21 circumferentially close to theinner surface 6a of saidsleeve 6. - All the described embodiments could be made according to a different circuit diagram shown in Figures 9 and 11, which provides for the insertion of a resistive protection element with positive temperature coefficient (PTC), indicated with
numeral 22, instead of theelectro mechanic thermostat 5b. - As one can see in the electric diagram of Figure 11, the
resistive element 22 is connected in series between the solid-state switch 8 and the electronic control means 10 which control its switching on and switching off. - On the basis of the aforesaid description, it should be understood that the heating group of the invention achieves all the intended objects.
- In particular, incorporating the solid-state switch inside the sleeve for fastening the heater to the radiant element, a greater heat dispersion is obtained, since in the area in which the sleeve is connected to the radiant element the operative temperature is constantly around values comprised between 70°C and 80°C, and thus far from the temperature threshold of 100°C which is dangerous for the
switch 8. - As previously mentioned, the heating group of the invention could be applied to radiant elements of any kind, both of fixed installation and of mobile installation.
- The thermo-conductive materials used could be of any kind, as long as thermo-conductive and thus able to provide for an optimal dispersion of the heat produced by the solid-state switch during operation.
- It is important to point out that said switch could be a thyristor of TRIAC or SCR type.
- It is intended that further executive embodiments of the invention, neither described nor shown in the drawings, if they fall within the scope of protection of the following claims, should be intended as protected by the present patent.
Claims (13)
- A heating group (1) for diathermic fluid radiant elements (A, B) comprising:- a heater (2) inserted in a housing (3) present in said radiant element (A, B) and put in contact with said diathermic fluid, said heater (2) consisting of a tubular body (4) containing an electric insulator (4a) in which at least an electric resistance (5) is inserted;- a tubular sleeve (6) disposed at one end of said tubular body (4) and provided with fastening means (6a) to said radiant element (A, B);- a feeding group (7) of said heater (2), comprising at least a solid-state switch (8) able to connect said electric resistance (5) to a distribution power grid (9);- electronic control means (10) for switching off and switching on said switch (8),characterized in that said solid-state switch (8) is disposed in said sleeve (6) where it is incorporated in a thermo-conductive core (11; 19; 20) adherent to the inner wall (6a) of said sleeve (6).
- The heating group (1) according to claim 1), characterized in that said solid-state switch (8) is coupled with a support base (12) incorporated in said thermo-conductive core (11), in which base (12) first terminals (13) for the connection to said electric resistance (5), second terminals (14) for the connection to said distribution power grid (9) and third terminals (15) for the connection to said electronic control means (10) are present.
- The heating group (1) according to claim 2), characterized in that said support base (12) comprises conductive stripes (16) to connect said solid-state switch (8) to said connection terminals (13; 14; 15).
- The heating group (1) according to claim 1), characterized in that said solid-state switch (8) is disposed in the air and it is connected to said electric resistance (5), to said distribution power grid (9) and to said electronic control means (10), being incorporated in said thermo-conductive core (20).
- The heating group (1) according to claim 2), characterized in that said thermo-conductive core (11) comprises a first thermo-conductive body (17), made of metallic material, and a second thermo-conductive body (18), with semicircular cross section and made of thermo-conductive resin, said first body (17) and said second body (18) being of circular sector cross section and having mutually facing contact surfaces between which said support base (12) of said solid-state switch (8) is comprised.
- The heating group (1) according to claim 5), characterized in that said first body (17) and said second body (18) are coupled with interference with the inner surface (6a) in said tubular sleeve (6).
- The heating group (1) according to claims 2) or 4), characterized in that said thermo-conductive core comprises a single thermo-conductive body (19) made of thermo-conductive resin, having circular cross section and being coupled with interference with said tubular sleeve (6).
- The heating group (1) according to claim 7), characterized in that an annular jacket (21), made of thermo-conductive and electrically insulated material, is interposed between said single thermo-conductive body (20) and the inner surface (6a) of said tubular sleeve (6).
- The heating group (1) according to any of the preceding claims, characterized by comprising a protective thermo-fuse (5a) disposed in said tubular body (4) and electrically connected to said electric resistance (5).
- The heating group (1) according to any of the claims 1) to 8), characterized by comprising a resistive protection element (22) with positive temperature coefficient connected in series between said solid-state switch (8) and said switching on and switching off electric control means.
- The heating group (1) according to any of the preceding claims, characterized in that said solid-state switch (8) is a thyristor.
- The heating group (1) according to any of the preceding claims, characterized in that said solid-state switch (8) is a SCR.
- The heating group (1) according to what claimed and described.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT000248A ITVI20030248A1 (en) | 2003-12-09 | 2003-12-09 | HEATING UNIT FOR RADIANT ELEMENTS WITH DIATHERMIC FLUID |
Publications (2)
Publication Number | Publication Date |
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EP1655546A1 true EP1655546A1 (en) | 2006-05-10 |
EP1655546A3 EP1655546A3 (en) | 2006-07-26 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04106370A Withdrawn EP1655546A3 (en) | 2003-12-09 | 2004-12-07 | Heating group for diathermic fluid radiant elements |
Country Status (2)
Country | Link |
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EP (1) | EP1655546A3 (en) |
IT (1) | ITVI20030248A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2000747A3 (en) * | 2007-06-08 | 2009-07-08 | José Romero Pérez | Modular electric radiator |
FR2932551A1 (en) * | 2008-06-11 | 2009-12-18 | Atlantic Industrie Sas | Heat transfer fluid type electric radiator for use in room, has heating blades set in parallel to each other by tubular element to which blades are fixed, where each blade comprises plain body made of thermal conductive material |
FR2945107A1 (en) * | 2009-05-04 | 2010-11-05 | Atlantic Industrie Sas | ELECTRIC RADIATOR WITH FLUID HEAT PUMP FORM OF MODULAR ELEMENTS MOLDED |
ITVI20120103A1 (en) * | 2012-05-02 | 2013-11-03 | Ht S P A | HEATING DEVICE FOR FLUIDS |
IT202200008582A1 (en) * | 2022-04-29 | 2023-10-29 | Ht S P A | HEATING DEVICE FOR FLUIDS |
Citations (7)
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EP0317435A1 (en) * | 1987-11-19 | 1989-05-24 | David André | Insulated electrical heating element with a security device for detecting failure of the electrical insulation |
US6147335A (en) | 1997-10-06 | 2000-11-14 | Watlow Electric Manufacturing Co. | Electrical components molded within a polymer composite |
EP1081986A2 (en) * | 1999-09-02 | 2001-03-07 | Bleckmann GmbH | Tubular heating element with NTC/PTC protection |
EP1156704A1 (en) * | 2000-05-17 | 2001-11-21 | Acova | Immersion heating device that could be used particularly in a water circulating heating radiator |
EP1278400A2 (en) | 2001-07-20 | 2003-01-22 | Jedac | Heating element |
DE10209905A1 (en) | 2002-03-07 | 2003-09-18 | Stiebel Eltron Gmbh & Co Kg | Electric heater, especially throughflow heater, has switch semiconducting body attached to heat conducting closure part of heating device chamber on side remote from chamber for switch cooling |
WO2003100326A1 (en) * | 2002-05-24 | 2003-12-04 | Irca S.P.A. | Control arrangement for heating devices |
-
2003
- 2003-12-09 IT IT000248A patent/ITVI20030248A1/en unknown
-
2004
- 2004-12-07 EP EP04106370A patent/EP1655546A3/en not_active Withdrawn
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0317435A1 (en) * | 1987-11-19 | 1989-05-24 | David André | Insulated electrical heating element with a security device for detecting failure of the electrical insulation |
US6147335A (en) | 1997-10-06 | 2000-11-14 | Watlow Electric Manufacturing Co. | Electrical components molded within a polymer composite |
EP1081986A2 (en) * | 1999-09-02 | 2001-03-07 | Bleckmann GmbH | Tubular heating element with NTC/PTC protection |
EP1156704A1 (en) * | 2000-05-17 | 2001-11-21 | Acova | Immersion heating device that could be used particularly in a water circulating heating radiator |
EP1278400A2 (en) | 2001-07-20 | 2003-01-22 | Jedac | Heating element |
DE10209905A1 (en) | 2002-03-07 | 2003-09-18 | Stiebel Eltron Gmbh & Co Kg | Electric heater, especially throughflow heater, has switch semiconducting body attached to heat conducting closure part of heating device chamber on side remote from chamber for switch cooling |
WO2003100326A1 (en) * | 2002-05-24 | 2003-12-04 | Irca S.P.A. | Control arrangement for heating devices |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2000747A3 (en) * | 2007-06-08 | 2009-07-08 | José Romero Pérez | Modular electric radiator |
FR2932551A1 (en) * | 2008-06-11 | 2009-12-18 | Atlantic Industrie Sas | Heat transfer fluid type electric radiator for use in room, has heating blades set in parallel to each other by tubular element to which blades are fixed, where each blade comprises plain body made of thermal conductive material |
FR2945107A1 (en) * | 2009-05-04 | 2010-11-05 | Atlantic Industrie Sas | ELECTRIC RADIATOR WITH FLUID HEAT PUMP FORM OF MODULAR ELEMENTS MOLDED |
EP2251612A1 (en) * | 2009-05-04 | 2010-11-17 | Atlantic Industrie | Electric radiator with heat-transfer fluid made up of moulded modular elements |
ITVI20120103A1 (en) * | 2012-05-02 | 2013-11-03 | Ht S P A | HEATING DEVICE FOR FLUIDS |
EP2661151A1 (en) * | 2012-05-02 | 2013-11-06 | HT S.p.A. | Device for heating fluids |
IT202200008582A1 (en) * | 2022-04-29 | 2023-10-29 | Ht S P A | HEATING DEVICE FOR FLUIDS |
EP4271128A1 (en) * | 2022-04-29 | 2023-11-01 | HT S.p.A. | Fluid heating device |
Also Published As
Publication number | Publication date |
---|---|
ITVI20030248A1 (en) | 2005-06-10 |
EP1655546A3 (en) | 2006-07-26 |
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