CN114174667A - Electric air heating device comprising a fastening device with an integrated fuse, engine and vehicle comprising such an engine - Google Patents
Electric air heating device comprising a fastening device with an integrated fuse, engine and vehicle comprising such an engine Download PDFInfo
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- CN114174667A CN114174667A CN202080045859.8A CN202080045859A CN114174667A CN 114174667 A CN114174667 A CN 114174667A CN 202080045859 A CN202080045859 A CN 202080045859A CN 114174667 A CN114174667 A CN 114174667A
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- Prior art keywords
- fastening
- wall
- heating device
- fuse
- air heating
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
- F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
- F02M31/12—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating electrically
- F02M31/13—Combustion air
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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
- F24H3/00—Air heaters
- F24H3/02—Air heaters with forced circulation
- F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
- F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
- F24H3/0429—For vehicles
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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
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1854—Arrangement or mounting of grates or heating means for air heaters
- F24H9/1863—Arrangement or mounting of electric heating means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/0241—Structural association of a fuse and another component or apparatus
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
- H01H85/05—Component parts thereof
- H01H85/055—Fusible members
- H01H85/06—Fusible members characterised by the fusible material
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- 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
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
- H05B1/0227—Applications
- H05B1/023—Industrial applications
- H05B1/0236—Industrial applications for vehicles
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- 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
- H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
- H05B3/16—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor the conductor being mounted on an insulating base
-
- 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
- H05B3/54—Heating elements having the shape of rods or tubes flexible
- H05B3/56—Heating cables
- H05B3/565—Heating cables flat cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/20—Bases for supporting the fuse; Separate parts thereof
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- 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
- H05B2203/022—Heaters specially adapted for heating gaseous material
- H05B2203/023—Heaters of the type used for electrically heating the air blown in a vehicle compartment by the vehicle heating system
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Power Engineering (AREA)
- Air-Conditioning For Vehicles (AREA)
- Fuses (AREA)
- Control Of Resistance Heating (AREA)
Abstract
The invention relates to an electric air heating device (1) comprising: a housing delimited by a wall (2) having an inner surface (13) and an outer surface (7); at least one resistive strip (3) arranged in the housing to heat the air; a fastening device (5) which fastens the resistive strip (3) to the wall (2) and comprises a fastening shaft (9) extending across the wall (2) and a fastening washer (8) facing the outer surface (7) of the wall (2) and in electrically conductive contact with the fastening shaft (9); a shut-off device (6) for interrupting the heating of the at least one resistive strip (3) in a state called overheated state of the electric air heating device (1) in which the temperature of the wall (2) exceeds a predetermined temperature; the cut-off device (6) comprises a fuse (10) arranged in electrically conductive contact with the fastening washer (8) and the wall (2); characterized in that the fastening means (5) comprise at least one fastening spacer which is fastened longitudinally between the fastening washer (8) and the wall (2), fastens the resistive strip (3) and the wall (2) to each other at least in the overheated state, and does not provide an electrically conductive contact between the fastening washer (8) and the wall (2).
Description
Technical Field
The invention relates to an electric air heating device for a diesel engine, comprising a fastening device with an integrated protective fuse, in particular a screw connection. The invention also relates to a diesel engine equipped with an electric air heating device comprising at least one fastening device with an integrated protective fuse, and to a vehicle comprising such a diesel engine.
Background
In this context, the expressions "fuse" and "thermal fuse" refer to the design of an element of an electrical circuit capable of interrupting the flow of electrical current in an electrical circuit comprising said "fuse" element in the event of overheating of said "fuse" element, said "fuse" element comprising a piece of hot-melt solid material which closes the electrical circuit in a first solid conductive form (in which electrical current flows in the electrical circuit) and opens the electrical circuit in a second solid non-conductive form (in which no electrical current flows in the electrical circuit) caused by overheating of the first solid conductive form.
In order to make it easier to start a diesel engine, it is proposed to heat the air flow entering the diesel engine. For this reason, sometimes an air electric heating apparatus is housed in an intake manifold of the diesel engine. Generally, such an electric air heating device comprises a housing adapted to guide a flow of air to be heated through an inner volume of the housing, and further comprises at least one resistive strip (resistive ribbon) arranged in the inner volume of the housing so as to be able to heat the flow of air to be heated passing through the inner volume of the housing containing the one or more resistive strips. When current flows through the one or more resistive strips, the temperature of the one or more resistive strips increases due to the joule effect, and heat is transferred from the one or more resistive strips to the air of the air stream in contact with the one or more resistive strips, thereby providing a heated air stream to the engine. However, in the event that the one or more resistive strips are heated and no air flows through the interior volume of the housing, the temperature of the one or more resistive strips increases and a corresponding amount of heat is transferred to the housing and the air heating device. As a result, since the electric current operates the air electric heating apparatus fastened to the intake manifold of the diesel engine, the housing of the air electric heating apparatus becomes overheated. There is a risk that: some components of the engine that extend near the housing of the electric air heating device may melt or ignite due to the temperature rise of the housing. This will occur when the engine is not operational, when no air flows through the housing interior volume of the electric heater, and when there is an improper operation of the control system of the air heating apparatus, in a state where the air heating apparatus is still in the operating mode. Due to the control system, the heater can operate normally even before the engine operates, and due to irregularities in the control system, the air heating apparatus can operate even after the engine stops operating. Since the heat of the heating element of the air heating apparatus is not sufficiently exhausted at this time, the components of the air heating apparatus including the housing are heated. When the housing reaches an excessively high temperature due to any type of improper operation, the components of the air heating apparatus, including the housing, start to burn or melt. Parts, vehicles or machinery in the vicinity of the air heating device are ignited and/or melted. This problem becomes even more important when the vehicle or machine is in an enclosed space in a garage or on a boat.
There is a need for a solution for preventing overheating of air heating devices and housings thereof, in particular overheating of more than 200 ℃.
US2014/159855 discloses an air heating device comprising a housing containing two resistive strips fastened to the housing by means of fastening screws, one of which is a fuse-integrated fastening screw. The shaft of the fastening screw with integrated fuse has a longitudinal portion cooperating with a hole formed in the envelope (envelop) of the casing, said longitudinal portion being electrically insulated from the envelope of the casing. The fuse comprises a coaxial tube having the same longitudinal axis as the shaft of the fastening screw and extending longitudinally in the following state: one end is electrically connected to the housing and one end is electrically connected to a conductive washer that is in contact with the shaft. The fuse-integrated fastening screw further comprises a tube of electrically insulating material forming an insulating spacer and radially sandwiched between the shaft of the fastening screw and the fuse, the tube of electrically insulating material being freely movable in the axial direction of the shaft of the screw. The fuse is thus electrically insulated radially from the shaft of the fastening screw and establishes a closed electrical circuit between the resistance strip and the housing, said circuit comprising the shaft of the fastening screw, the conductive washer and the fuse electrically connected in series.
However, the fuse-integrated fastening screw of US2014/159855 has some drawbacks. The fuse melts when the temperature of the housing rises and when the temperature of the fuse secured to the housing reaches a value higher than the melting temperature of the melt material. Therefore, the preload force applied between the housing and the nut of the fastening screw is reduced to zero, and the air heating apparatus may be disassembled. Parts of the air heating apparatus may eventually enter the combustion chamber of the engine, seriously damaging the engine.
Disclosure of Invention
The present invention aims to overcome these disadvantages.
The present invention aims to provide a robust solution to overcome these drawbacks.
The invention aims to provide a stable and reliable air electric heating device which comprises a fastening device with an integrated fuse.
The present invention aims to provide an air electric heating apparatus which includes a fastening device having an integrated fuse and which remarkably maintains fastening strength after melting of a material of the fuse.
The invention aims to provide a stable and reliable air electric heating device which comprises a fastening device with an integrated fuse and is simple to manufacture, and the fastening device with the integrated fuse is easy to install in an air electric heater.
The present invention aims to provide an electric air heating device which can be assembled from a small number of parts and is thus easy to manufacture.
The invention aims to provide a stable and reliable air electric heating device which comprises a fastening device with an integrated fuse and reduces the manufacturing cost.
The invention aims to provide a stable and reliable screw connection device which has an integrated fuse and allows the time for assembling an air electric heating device to be limited.
The invention aims to provide a stable and reliable air electric heating device comprising a fastening device with an integrated fuse, so that the assembly of the air electric heating device can be maintained even after the fuse of the fastened fastening device is melted.
The invention aims to provide a stable and reliable fastening device which has an integrated fuse and can be manufactured precisely.
The present invention aims to provide an electrical air heating device comprising a fixed fastening arrangement with an integrated fuse and to be placed in the engine compartment of a diesel machine, and also aims to provide a machine, in particular a diesel machine, which is cheap and reliable and able to withstand severe vibration distributions.
The present invention aims to provide an electric air heating apparatus which solves the problem of the decrease in fastening strength after the fuse in US2014/159855 is melted.
The present invention aims to provide an air-electric heating device which solves the problem of separation of the solid elements of the air-electric heating device after the fuse in US2014/159855 is melted.
The present invention is directed to providing an electric heating apparatus that maintains fastening strength after a fuse is melted.
The present invention aims to provide an electric air heating device which limits, if not avoids, the risk of dispersion of the elements of the electric air heating device into the vehicle engine.
The present invention aims to provide an electric air heating device which limits, if not avoids, the risk of damaging the vehicle engine.
The present invention aims to provide an electric air heating device which makes it possible to manage the temperature of the electric air heating device and to protect the electric air heating device and the environment of the electric air heating device from the risks of overheating and fire.
The invention relates to an electric air heating device, comprising:
-a housing bounded by a wall having an inner surface and an outer surface;
-at least one resistive strip arranged in the inner space of the housing adapted to heat air in an air flow (a bleed of air) flowing through the housing and to form a heated air flow;
-fastening means cooperating with the inner and outer surfaces of the wall to fasten the resistive band to the wall, said fastening means comprising at least:
a fastening shaft extending across the wall, and;
a fastening washer of the fastening device facing the outer surface of the wall and in electrically conductive contact with the fastening shaft;
-a cut-off device for opening the circuit supplying current to said at least one resistive strip and interrupting the heating of said at least one resistive strip in a condition in which the wall temperature, called the overheated condition, of the electric air heating apparatus exceeds a predetermined temperature;
the cut-off device comprises a fuse arranged in electrically conductive contact with the fastening washer and the wall;
characterized in that the fastening means comprise at least one fastening spacer;
■ are fastened in the longitudinal direction between the fastening washer and the wall;
■ fastens the resistive strip and the wall to each other at least in the overheated state, and
■ provide no conductive contact between the fastening washer and the wall.
The present invention relates to an electric air heating device comprising at least one electric resistance band to heat the air in an air flow, which is protected from overheating, in particular in the event of interruption of the air flow and a dangerous increase in the temperature of the walls of the housing. In this case, the power supply to the resistance tape is cut off due to the fuse melting. The resistance band remains firmly fastened to the wall of the housing in the inner space of the housing. There is no risk that components of the air heating apparatus break down and fall into the engine compartment and/or into the combustion chamber of the engine and damage the engine. In addition, in order to repair the air electric heating apparatus according to the present invention, it is sufficient to replace the fuse without replacing the entire air electric heating apparatus.
The electric air heating device according to the invention comprises a shut-off means integrated in said fastening means, called first fastening means. The first fastening means fasten the at least one resistive strip to the wall of the casing and are arranged to electrically connect the at least one resistive strip to the negative (-) terminal of the battery. In a preferred embodiment of the electric air heating apparatus according to the present invention, the first fastening means is connected to the negative (-) terminal of the secondary battery through a wall of the housing.
The fastening spacer is selected and adapted to: in both the operating state of the air heating apparatus in which the fuse is in electrical contact with both the fastening washer and the wall of the housing, and in said overheated state of the air heating apparatus in which the material forming the fuse melts and interrupts the electrical circuit between the fastening washer and the housing, the at least one resistance strip is allowed to be fastened to the wall of the housing.
The shut-off means of the electric air heating device is adapted to open the electric circuit in said overheated state and to maintain the open electric circuit when the temperature of the wall of the housing decreases to a temperature below a predetermined temperature.
The fuses of the air electric heating device extend outside the housing and are installed in series in the electric circuit.
In some preferred embodiments of the electric air heating apparatus according to the present invention, the fuse is a tube-shaped fuse extending coaxially with the fastening shaft.
The electric air heating device according to the invention comprises second fastening means, different from the first fastening means, which fasten the at least one resistive strip to the housing and electrically connect the at least one resistive strip to the positive (+) terminal of the accumulator, so that a closed electric circuit is formed, in which an electric current flows from the accumulator, through the second fastening means, then through the at least one resistive strip, then through the first fastening means, then through the housing back to the accumulator.
Advantageously and according to the invention, the current flows from the inner end of the fastening shaft, where the fastening means fasten the resistive strip, through the fastening shaft of said fastening means, to the outer end of the fastening shaft, which cooperates with the cut-off means and the fastening nut.
In some preferred embodiments of the electric air heating device according to the invention, the resistive strips are connected in series in the electric circuit.
The fastening spacer of the electric air heating device according to the invention is selected and arranged such that: so that the current flows in the first fastening means, starting from the resistive strip fastened to the first fastening means, through the fastening shaft of the first fastening means, then through the fastening washer, then through the fuse and back to the wall of the housing. The fastening spacer of the electric air heating device according to the invention is so selected and arranged as to avoid mutual direct electrical contact between the fastening shaft and the wall of the housing. The fastening washer of the electric air heating device is selected and arranged so as to keep the resistance band and the wall of the housing fastened to each other even in said overheated state. Advantageously, the fastening spacer is a tube extending coaxially with respect to the fastening shaft.
In some preferred embodiments of the electric air heating device according to the invention, the fastening spacer is made of at least one non-melt material. The material of the fastening spacer has a melting temperature higher than that of the fuse. Advantageously, the fastening spacer may be made of at least one metal selected from the group formed by copper, aluminum, titanium, iron, zinc, beryllium, magnesium, silver, gold, lead. Advantageously, the fastening spacer may be made of at least one material selected from the group formed by metal alloys, silicon bronze, inconel, brass, amalgam and aluminum alloys. The fastening spacer may be made entirely of a ceramic material or of a rigid rubber material or other plastic. The fastening spacer may be made entirely of a metallic material that is wrapped with an outer surface layer of at least one insulating material. The fastening spacer of the electric air heating device according to the invention is so selected and arranged as to be able to mechanically resist the longitudinal compressive strength provided by said first fastening means.
In some embodiments of the electric air heating apparatus according to the present invention, the fastening spacer is a tubular fastening spacer extending coaxially with the fastening shaft and being in close contact with said fastening shaft.
In some embodiments of the electric air heating device according to the invention, the at least one fastening spacer comprises, in particular is formed by:
-at least one tube made of non-molten metallic material adapted to fasten said at least one resistance band to the wall in said overheated condition of the electric air heating device;
at least one insulating element, called L-shaped or U-shaped insulating element (in longitudinal section), shaped so as to extend radially between the fuse and the fastening shaft and longitudinally between the tube made of non-molten metal material and at least one of the fastening washer and the wall of the housing, and radially insulate said at least one tube made of non-molten metal material from the wall of the housing.
In some embodiments of the electric air heating device according to the invention, the at least one tube made of non-molten metallic material and the at least one tubular insulating member extend coaxially with the fastening shaft.
In some preferred embodiments of the electric air heating device according to the invention, the fastening spacer comprises, in particular is formed by:
-at least one metal tube made of non-molten material suitable for fastening said at least one resistance band on the wall in said overheated condition of the electric air heating device;
-at least one tubular insulating element electrically insulating said at least one metal tube made of non-melt material from the fuse in a radial direction;
-a ring extending longitudinally between the wall and the at least one metal tube made of non-melt material and electrically insulating the at least one metal tube made of non-melt material longitudinally from the wall.
The melting temperature of the material forming the fuse is lower than the melting temperature of the material forming the fastening spacer. The melting temperature of the material forming the fuse is lower than the melting temperature of the non-melt material of the metal tube.
The material forming the fuse may be selected from the group consisting of metal alloys, brass, aluminum/zinc alloys, magnesium/aluminum alloys, silicon/magnesium alloys, tin/zinc alloys, and lead/zinc alloys. Other materials are also possible. The material forming the fuse is selected to match a desired predetermined temperature.
The material forming the metal tube may be selected from the group consisting of metals and metal alloys. The material forming the metal tube is selected from the group consisting of copper, aluminum, titanium, iron, zinc, beryllium, magnesium, silver, gold, lead and alloys thereof in permitted proportions, such as silicon bronze, inconel, brass and amalgam. Thus, the melting temperature of the fuse can be adapted to different air heating devices.
In some preferred embodiments of the electric air heating device according to the invention, the fastening washer, the fuse, the at least one metal tube made of non-melt material and the at least one tubular insulating element extend coaxially with the fastening shaft.
In some preferred embodiments of the electric air heating device according to the invention, the shut-off means comprise a ring made of an electrically insulating material having a high compressive strength and extending longitudinally between the wall of the housing and the fastening spacer, in particular between the wall of the housing and at least one of the at least one metal tube and the at least one tubular insulator made of non-melt material.
In some preferred embodiments of the electric air heating device according to the invention the ring is made of a material having sufficient compressibility, high heat resistance and low electrical conductivity. In some preferred embodiments of the electric air heating apparatus according to the present invention, the ring is made of at least one material selected from the group of ceramics, polymer materials having high compressive strength, high heat resistance and low electrical conductivity, and mica.
In some preferred embodiments and according to the invention, the air heating apparatus comprises a cover that wraps around an exterior portion of the fastening means so as to collect molten material of the fuse such that the molten material of the fuse is captured within the protective cover regardless of the position of the fastening means.
In some preferred embodiments of the electric air heating apparatus according to the invention, the fastening washer is selected from the group formed by a flat washer and a spring washer. However, the fastening means may well comprise at least one additional washer selected from the group consisting of flat washers, guard washers (bender washers), Belleville washers (Belleville washers), curved washers and spring washers.
In some preferred embodiments of the electric air heating device according to the invention, the fastening washer may be a washer made of steel or a washer made of stainless steel.
In some preferred embodiments of the electric air heating device according to the invention, the fastening means comprise a screw and at least one nut cooperating with a threaded portion of the conductive shaft of the screw to fasten the resistance band to the wall of the casing. The threaded shaft of the screw and the at least one nut are so arranged as to apply a tightening force to the headed end of the screw extending at the inner surface of the wall of the housing.
In some other embodiments of the electric air heating device according to the invention, the fastening means comprise rivets which fasten the resistance band to the wall of the casing.
In some preferred embodiments of the electric air heating apparatus according to the invention, the fastening shaft of the fastening means is arranged to extend across a hole formed in a wall of the housing. The fastening shaft is arranged coaxially with the hole and electrically insulated from an inner wall of the hole. The fastening means is arranged to electrically insulate the resistive strip from the inner surface of the wall of the housing and to connect the resistive strip to the positive pole of the remote external storage battery. The fastening shaft is fastened transversely to the wall of the housing and is electrically insulated with respect to the hole and does not contact the hole and the wall of the housing, one longitudinal (inner) end of the fastening shaft being electrically connected with one of the resistive strips, the other longitudinal (outer) end of the fastening shaft comprising a cut-off device.
The invention also extends to an engine, in particular a diesel engine, comprising at least one electric air heating device according to the invention. The invention also extends to an engine in which at least one electric air heating apparatus according to the invention is sandwiched in the intake manifold of an engine, particularly a diesel engine.
The invention also extends to a machine, in particular a vehicle, comprising an engine, in particular a diesel engine, according to the invention. The invention also extends to a machine, in particular a vehicle, comprising an engine having an electric air heating device secured in an engine compartment of the machine. The invention also extends to a machine, in particular a vehicle, comprising an electric air heating device secured in an engine compartment of the machine, in particular of the vehicle.
The invention also relates to an electric air heating device, a diesel engine equipped with said electric air heating device, a vehicle comprising such a diesel engine, the electric air heating device, the diesel engine and the vehicle being characterized in that, in combination or individually, they have all or some of the features specified above or below. Regardless of the formal representation provided, the various features specified above or below should not be considered as being closely or inseparably interrelated to each other, unless explicitly stated otherwise, and the present invention may relate to only one of these structural or functional features, or only some of these structural or functional features, or only a portion of one of these structural or functional features, or even any group, combination or juxtaposition of all or some of these structural or functional features.
Drawings
Other objects, features and advantages of the present invention will become apparent from a reading of the following description, which is provided by way of non-limiting example of some of the possible embodiments of the invention and with reference to the accompanying drawings, in which:
figure 1 is a cross-sectional view of a fastening device with an integrated thermal cut-out of an air heating apparatus according to a first particular embodiment of the invention;
figure 2 is a cross-sectional view of a fastening device with an integrated thermal cut-out of an air heating apparatus according to a second particular embodiment of the invention;
fig. 3 is a cross-sectional view of a fastening device with an integrated thermal cut-out of the air heating apparatus according to the embodiment shown in fig. 2, and in which overheating of the air heating apparatus occurs;
figure 4 is a perspective view of a detail of the fastening means to the casing of the air heating device according to the invention;
figure 5 is an exploded cross-sectional view of a detail of an electric air heating device comprising fastening means with integrated thermal cut-out according to a first particular embodiment of the invention;
figure 6 is an overall perspective view of an air heating device according to one embodiment of the invention;
figure 7 is a perspective view of a detail of an air heating device according to one embodiment of the invention.
Detailed Description
The object of the present invention is to provide a simple, cheap and stable solution for preventing overheating of an air heating device.
Fig. 1 and 2 show in a sectional view a detail of a fastening device 5 of a first and a second embodiment of an electrical air heating apparatus 1 according to the invention, respectively, the fastening device 5 having an integrated shut-off device 6 comprising a fuse 10. In fig. 1 and 2, the fuse 10 is never exposed to a temperature higher than the melting temperature of the material forming said fuse 10, the circuit is a closed circuit and the air electrical heating device is in an operative state. The fastening device 5 with the integrated electrical cut-off device 6 is fastened to the housing 2 and comprises a shaft 9, which shaft 9 extends longitudinally through a hole 21 formed in the housing 2 and traverses the housing 2. The fastening means 5 to the housing 2 comprise a screw 22 having a threaded shaft 23, the threaded shaft 23 cooperating with a nut 24 to fasten the heating belt 3 to the housing 2. The headed longitudinal end of the screw 22 is in electrically conductive contact with the longitudinal end of the heating band 3 extending in the inner space 4 of the housing 2, said longitudinal end of the heating band 3 forming a washer with a central hole cooperating with the head of the screw 22. The conductive gasket 18 is sandwiched between the gasket-shaped longitudinal end of the heating band 3 and a gasket 19 made of an electrically insulating material (for example made of mica), which mica gasket 19 is in contact with the housing 2 and electrically insulates the heating band 3, the conductive gasket 18 and the screw 22 from the housing 2. The thickness of the conductive washer 18 is selected to improve the electrical conductivity between the heating belt 3 and the shaft 9. The fastening means 5 comprises an O-ring 20, which O-ring 20 is arranged in a counter bore 43 formed at the inner end of the bore 21 and is adapted to prevent air leakage through the bore 21. The O-ring 20 is also adapted to maintain the screw 22 in a position in which the shafts 9, 23 are axially centred within the hole 21 and to prevent conductive contact with the wall of the hole 21. The fastening means 5 are arranged in the following manner: so that the circuit is necessarily established via the cut-off device 6.
However, according to the present invention, the fastening means 5 may be entirely a rivet fastening the heating belt 3 to the case 2.
The cut-off device 6 integrated in the fastening device 5 is a cut-off device that opens an electrical circuit when the temperature of the air electrical heating apparatus and/or the housing 2 exceeds the melting temperature of the material constituting the fuse 10.
In the first and second embodiments shown in fig. 1 and 2, the fuse 10 is a tube fuse. However, the fuse 10 may have a different shape at all. Fuse 10 may be made from a variety of materials. Advantageously, the material of the fuse 10 is selected to adjust the melting temperature so that the thermal cut-off device can accommodate different air-electric heating apparatuses 1. The fuse 10 is made of an alloy material having a melting temperature suitable for the use condition of the air electric-heating apparatus 1.
In the first and second particular embodiments shown in fig. 1 and 2, the fastening device 5 further comprises a cover 15 fastened to the shaft 23 of the screw 22. The cover 15 may be made of a plastic material. The cover 15 is intended to cooperate with the outer surface 7 of the housing 2 to protect the fastening device 5 from dirt from the engine and also to trap the melt material within the cover 15 so that it is not dispersed in the engine compartment. The cover 15 comprises means for fastening said cover 15 to the shaft 23 of the fastening means 5 and to the air heating device 1:
a first wedge-shaped washer 26, interposed between the nut 24 and the cover, and sized to adapt the position of the cover 15 with respect to the casing 2;
a second washer 27 cooperating with the spring washer 28 and the nut 42 to fix the cover 15 to the air heating device 1.
The cutting device 6 of the first embodiment of the electric air heating device 1 according to the invention shown in fig. 1 comprises as fastening elements:
screws 22 cooperating with nuts 24 to fasten the heating band 3 on the inner surface 13 of the casing 2;
a fastening spacer 46, which forms a tube extending coaxially with the shafts 9, 23 and is arranged in abutment with the bottom 25 of the counter bore 17 formed in the hole 21. The fastening spacer 46 is made of a material having high compressive strength and high electrical insulation properties, and is advantageously made of a ceramic material. The fastening spacer 46 is selected to withstand high fastening torques. The fastening spacer 46 extends radially inwards next to the shafts 9, 23 and radially outwards next to the fuse 10, and the longitudinal dimension of the fastening spacer 46 is such as to be able to transfer the compressive strength provided by the nut 24 in cooperation with the threaded shaft 23 of the screw 22 to the heating band 3 and to be able to fasten the heating band 3 to the outer surface 13 of the housing 2.
A fastening washer 8 adapted to transmit the compressive strength provided by the nut 24 in cooperation with the threaded shaft 23 to a fastening spacer 46, and
a spring washer 16 arranged to elastically push the fastening washer 8 against the fastening tube 11 and to prevent the nut 24 from loosening automatically.
The fuse 10 and the fastening spacer 46 are selected and dimensioned such that, when fastening the fastening device 5 to the housing 2, firstly the fuse 10 is compressed between the fastening washer 8 and the housing 2 to form an electrical contact for the current, and then the fastening spacer 46 is secondly compressed between the fastening washer 8 and the bottom 25 of the counterbore 17 formed in the hole 21 of the housing 2.
The cut-off device 6 comprises as conductive/electrically insulating elements:
the conductive shaft 9, 23 of the screw 22;
an electrically conductive fastening washer 8, dimensioned to be in electrical contact with the shaft 9, 23 of the fastening device 5;
a fuse 10 extending longitudinally between the fastening washer 8 and the outer surface 7 of the housing 2 and facing radially the outer surface of the fastening spacer 46, and;
a fastening spacer 46 radially interposed between the conductive shaft 9, 23 of the screw 22 and the conductive fuse 10.
The fastening spacer 46 is so selected, dimensioned and arranged as to prevent any direct electrically conductive contact between the shafts 9, 23 of the screws 22 and the housing 2. The fastening spacers 46 are selected and arranged such that the current flowing through the heating strips 3 must flow through the fuse 10 to the grounded housing 2.
However, according to the present invention, the one-piece fastening spacer 46 may be entirely formed of a plurality of elements. In fig. 2, a sectional view of a detail of a fastening device 5 of a second specific embodiment of an electrical air heating apparatus 1 according to the invention is shown, the fastening device 5 having an integrated shut-off device 6 comprising a fuse 10.
The cutting device 6 of the second embodiment of the electric air heating apparatus 1 according to the present invention shown in fig. 2 includes the following elements as fastening elements:
screws 22 cooperating with nuts 24 to fasten the heating band 3 on the inner surface 13 of the casing 2;
a ring 14 forming a thick washer extending coaxially with the shafts 9, 23 and arranged in abutment with a bottom 25 of a counter bore 17 formed in the hole 21. The ring 14 is made of a material having high compressive strength and high electrical insulation properties, and is advantageously made of a ceramic material. The ring 14, made of a material with high compressive strength, is suitable to withstand high fastening torques;
a fastening tube 11 extending coaxially with the shaft 9, 23 and radially next to the shaft 9, 23. The fastening tube 11 is dimensioned to be able to transfer the compressive strength provided by the nut 24 in cooperation with the threaded shaft 23 of the screw 22 to the heating belt 3 and to fasten the heating belt 3 to the outer surface 13 of the housing 2. In a preferred embodiment, the fastening tube 11 is made of a metallic material. The fastening tube 11 can be made entirely of metal or metal alloy;
a tubular insulator 12, which extends longitudinally between the ring 14 and the fastening washer 8 and is apt to cooperate with the fastening tube 11 to transmit the compression strength. In a preferred embodiment, the tubular insulator 12 is made of at least one polymer insulating material;
a fastening washer 8 adapted to transmit the compressive strength provided by the nut 24 in cooperation with the threaded shaft 23 to the fastening tube 11, and
a spring washer 16 arranged to elastically push the fastening washer 8 against the fastening tube 11 and to prevent the nut 24 from automatically loosening.
The fuse 10 and the fastening tube 11 are selected and dimensioned such that when fastening the fastening device 5 to the housing 2, the fuse 10 is first compressed between the fastening washer 8 and the housing 2 to form an electrical contact for the current, and then further fastening will compress the fastening tube 11.
The cut-off device 6 comprises as conductive/electrically insulating elements:
the conductive shaft 9, 23 of the screw 22;
an electrically conductive fastening washer 8, dimensioned to be in electrical contact with the shaft 9, 23 of the fastening device 5;
a fuse 10 extending longitudinally between the fastening washer 8 and the outer surface 7 of the casing 2 and facing radially the outer surface of the tubular insulating member 12;
an electrically insulating ring 14, and
a tubular insulating member 12, radially interposed between the fastening tube 11 and the conductive fuse 10, extending.
However, the tubular insulator 12 and the electrically insulating ring 14 may be formed entirely of the same material. The tubular insulating member 12 and the electrically insulating ring 14 may also be formed entirely from one piece of one material.
The electrically insulating ring 14 and the tubular insulator 12 are so selected and arranged as to prevent any direct electrically conductive contact between the shafts 9, 23 of the screws 22 and the housing 2. The electrically insulating ring 14 and the tubular insulator 12 are selected and arranged such that current flowing through the heating tape 3 must flow through the fuse 10 to the grounded housing 2.
In fig. 3 a cross-sectional view of a detail of a fastening means 5 with an integrated shut-off means 6 of a specific embodiment of an electric air heating device 1 according to the invention is shown. In fig. 3, the fuse 10 has been exposed to a temperature higher than the melting temperature of the material forming the fuse due to overheating of the air electric heating device and the housing 2, so that the fuse 10 has melted. When melted, the hot-melt material constituting the fuse flows out, breaking the contact between the fastening washer 8 and the housing 2, and then solidifies. A substantial portion of the material forming the fuse (particularly a substantial portion of the alloy) remains trapped in the cover 15.
Since the material constituting the fuse 10 does not make electrical contact between the fastening washer 8 and the outer surface 7 of the housing 2, the electrical circuit comprising the heating strip 3 is broken and the air heating device is switched to be in a non-operating state. However, even in the non-operating state of the air electrical heating apparatus 1, since the fastening tube 11 extends longitudinally between the fastening washer 8 and the ring 14, the compressive strength provided by the screw 22 in cooperation with the spring washer 16 is maintained after the fuse has melted. The fastening device 5 is held against vibrations provided by the engine in operation and no parts of the air-electric heating apparatus will break down and fall apart into the engine compartment. In addition, the melt material remains confined in the cover 15 regardless of the orientation of the air-electric heating device 1. Replacement of the fuse 10 can be achieved by removing the cover 15, loosening the nut 15, removing the spring washer 16, the fastening washer 8 and the deformed melt material, and replacing with a new fuse. This replacement avoids replacing the entire air-electric heating device.
In the detail of the electric air heating device according to the invention shown in fig. 4, in which the cover is not shown, the casing 2 has a hole 21 which crosses the casing 2 and is suitable for housing a fastening means 5, called fastening means (+), connected to the positive (+) terminal of the accumulator (not shown). The electric air heating device shown in fig. 4 comprises a fastening means 5 with an integrated shut-off means 6. In the electric air heating apparatus shown in fig. 4, the cover 15 is removed. The fastening means 5 comprise a screw having a threaded shaft 23, the threaded shaft 23 traversing a hole formed in the housing 2. The heating belt 3 is fastened in the inner space 4 of the housing 2 in the following manner: so that the heating strip 3 is electrically connected to the shaft 9 of the screw and electrically insulated from the housing 2. To this end, the fastening means 5 comprise an electrically conductive washer 18, this electrically conductive washer 18 being sandwiched between washer-shaped longitudinal ends of the heating band 3 (for increasing the electrical contact surface between the heating band 3 and the shaft of the screw and improving the electrical conductivity between the heating band 3 and the shaft) and a washer 19 made of an electrically insulating material (for example made of mica), said mica washer 19 being in contact with the housing 2 and electrically insulating the heating band 3 from the inner surface 13 of the housing 2.
The fastening device 5 shown in fig. 4 has a fuse 10 made of an electrically conductive material, which fuse 10 extends between the housing 2 and the fastening washer 8 in a state where one longitudinal end is in contact with the housing 2 and the opposite longitudinal end is in contact with the fastening washer 8, and is maintained to be compressed in the longitudinal direction by the cooperation of the screw with the nut 24 and the spring washer 16.
The electric air heating device shown in longitudinal section in fig. 5 has a fastening device 5, which fastening device 5 has an integrated shut-off device 6 comprising a fuse 10. The fastening means 5 are fastened to the housing 2 and cooperate with a hole 21 formed in the housing 2. The bore 21 includes a counterbore 17 at the outer end of the bore 21 and a counterbore 43 at the inner end of the bore 21. The counterbore 17 forms an abutment receiving a ring 14, which ring 14 extends coaxially with the shaft 9 of the screw 22, the fuse 10, the fastening washer 8, the fastening tube 11 and the tubular insulator 12. In the fastening device 5, the fastening tube 11 and the shaft 9 of the screw 22 are electrically insulated in the radial direction by the insulator 12 and in the longitudinal direction by the ring 14, so that the current must travel from the heating strip 3 through the shaft 9, the fastening washer 8, the fuse 10 to the outer surface 7 of the housing 2.
Fig. 6 shows an electrical air heating device 1 according to a specific embodiment of the invention comprising a fastening means 5, which fastening means 5 has an integrated thermal cut-out 6 comprising a fuse tube 10.
Generally, the electric air heating apparatus 1 is sandwiched in an intake manifold secured in an engine compartment of a diesel engine. Therefore, in the case where the air electric heating apparatus is overheated, particularly, the case of the air electric heating apparatus is overheated, and before the air electric heating apparatus or a component (for example, the air filter, the hose … …) around the air electric heating apparatus starts to be damaged, the supply of electric power to the air electric heating apparatus 1 needs to be stopped.
The present invention therefore relates to an electric air heating device in which the supply of electric power to the heating belt is interrupted in the event of overheating of the casing and the risk of the constituent elements of the air heating device disintegrating due to the vibrations provided by the running engine and falling into the combustion chamber of the engine and damaging it is limited.
One of the main advantages is that the longitudinal fastening force exerted by the fastening means 5 is maintained, including after melting of the constituent material of the fuse tube 10, which is caused by overheating of the housing 2. In this case, the operation of the electric air heating apparatus 1 is interrupted because the power supply circuit of the heating belt 3 of the electric air heating apparatus 1 is disconnected. However, the fastening means 5 and the constituent elements of the electric air heating device 1 are held by the fastening force exerted by the fastening means 5 and, despite the vibrations provided by the motor in operation and possibly by the air flow, there is no risk of damaging the motor.
In the embodiment shown in fig. 6, the electric air heating device 1 comprises four fastening means 5, which fastening means 5 traverse the housing 2 through holes 21 formed in the housing and fasten the heating belt 3 to the housing 2. One of the fastening devices 5 (referred to as a fastening device (+)30) is connected to a positive (+) terminal of a storage battery (not shown) forming a vehicle power source. A fastening device (+)30 with an integrated cut-off device 6 is mounted on top of the electric air heating device 1. The fastening means (+)30 traverse the casing 2 through a transverse hole formed in the casing 2 of the electric air heating apparatus 1. The fastening means (+)30 are electrically insulated from the inner wall of the hole traversing the housing 2 and are connected to one longitudinal end of a first heating strip 31 extending in the inner space 4 of the housing 2, so that an electric current flows through the first heating strip 31 to a second longitudinal end 32 of the first heating strip 31. The second longitudinal end 32 of the first heating tape 31 is fastened to the housing 2 by means of a second fastening means 33 traversing the housing 2 and is electrically insulated from the housing 2. The electric air heating device 1 shown in fig. 6 comprises a second heating strip 34, a first longitudinal end 36 of which second heating strip 34 is fastened to the housing 2 by means of a third fastening means 35. The second fastening means 33 and the third fastening means 35 comprise a plate 37 made of an electrically insulating material, which plate 37 is insulated from the housing 2, the second fastening means 33, the second longitudinal end 32 of the first heating tape 31, the first longitudinal end 36 of the second heating tape 34 and the third fastening means 35. The second fastening means 33 and the third fastening means 35 further comprise a bridge 38 made of an electrically conductive material 36 and electrically connecting the first heating tape 31 and the second heating tape 34. The second longitudinal end 39 of the second heating belt 34 is fastened to the housing 2 by means of a fourth fastening device 5 with an integrated thermal cut-off device 6, which integrated thermal cut-off device 6 comprises a tube 10 made of electrically conductive melt material. The fourth fastening means 5 traverses the casing 2 through a hole formed in the casing 2 and is electrically insulated from the hole of the casing 2 in the following manner: the current supplied by the power source (accumulator, not shown) connected to the fastening means (+)30 according to the present invention circulates in the heating bands 31, 34 up to the fourth fastening means 5, necessarily flowing along the axis of the fourth fastening means 5 and reaching the housing 2 through the electrically conductive connection necessarily comprising the fuse tube 10, and the current is made to necessarily flow through the fuse tube 10 extending in contact with the housing 2. The case 2 is grounded (negative terminal) by means of a connection portion that engages with a hole 29(-) formed in the case 2.
The embodiment of an electric air heating device 1 according to the invention shown in fig. 6 comprises a housing 2 delimiting an inner space 4, which inner space 4 is intended to be passed through by a flow of air to be heated. Two meandering heating strips 31, 34 extend in the interior space 4 and cross the air flow to be heated. The meandering heating belt 31, 34 has a plurality of straight line segments 40, and these straight line segments 40 are separated from each other in the longitudinal direction by bent portions 41 (or turn portions or folded portions). The air heating apparatus 1 includes two holding members 44, and the two holding members 44 are used to fix the insulating members to the opposite inner surfaces of the housing 2. Each holder 44 houses a solid piece 45 of insulating material. The at least two insulators 45 have aligned grooves, each aligned groove adapted to receive and accommodate a folded portion 41 of one serpentine heating strip 31, 34.
The detail of the electric air heating device 1 shown in fig. 7 shows a fastening means 5, called fastening means (+)30, adapted to be connected to the positive (+) terminal of a storage battery (not shown). The fastening means (+)30 cross the hole of the housing 2 and have an inner end electrically connected to a heating belt 31 fastened in the inner space 4 of the electric air heating apparatus 1. The electric air heating device further comprises a heating strip 34, which heating strip 34 is fastened in the inner space 4 of the electric air heating device 1 and is electrically connected to a fastening means 5(-) which fastening means 5(-) is placed in electrical contact with the housing 2 only through the fuse 10. The fastening means (+)30, the heating bands 31, 34, the fastening means 5(-), the casing 2 and the hole 29(-) at the negative (-) terminal adapted to be connected to a storage battery (not shown) form part of an electric circuit, enabling the heating band 3 to be heated by joule effect.
The invention may be the subject of many variations and applications other than those described above. In particular, it is clear that, unless otherwise specified, the various structural and functional features of each of the foregoing embodiments should not be considered combined and/or closely and/or inseparably interrelated, but rather, must be considered simply juxtaposed. Furthermore, the structural and/or functional features of the various embodiments described above may be all or part of the subject matter in any different juxtaposition or in any different combination.
Claims (13)
1. An electric air heating device (1) comprising:
-a housing delimited by a wall (2) having an inner surface (13) and an outer surface (7);
-at least one resistive strip (3), said at least one resistive strip (3) being arranged in the interior space (4) of the housing, adapted to heat air in an air flow flowing through the housing and to form a heated air flow;
-fastening means (5), said fastening means (5) cooperating with said inner surface (13) and with said outer surface (7) of said wall (2) to fasten said at least one resistive band (3) to said wall (2), said fastening means (5) comprising at least:
a fastening shaft (9), the fastening shaft (9) extending across the wall (2), and;
-a fastening washer (8) of the fastening device (5), the fastening washer (8) facing the outer surface (7) of the wall (2) and being in electrically conductive contact with the fastening shaft (9);
-a cut-off device (6), said cut-off device (6) being intended to open the circuit supplying current to said at least one resistive strip (3) and to interrupt the heating of said at least one resistive strip (3) in a condition in which the temperature of said wall (2) of said air electric heating apparatus (1) exceeds a predetermined temperature, called an overheated condition;
the cut-off device (6) comprising a fuse (10), the fuse (10) being arranged in electrically conductive contact with the fastening washer (8) and the wall (2);
characterized in that said fastening means (5) comprise at least one fastening spacer;
■ are fastened in the longitudinal direction between the fastening washer (8) and the wall (2);
■ fastens the at least one resistance band (3) and the wall (2) to one another at least in the overheated state, and
■ provide no electrically conductive contact between the fastening washer (8) and the wall (2).
2. Electric air heating device (1) according to claim 1, characterized in that said fastening spacer comprises:
-at least one metal tube (11), said at least one metal tube (11) being made of non-molten material, suitable for fastening said at least one electric resistance band (3) on said wall (2) in said overheated condition of said air electric heating device (1);
-at least one tubular insulating element (12), said at least one tubular insulating element (12) electrically insulating said at least one metal tube (11) made of non-melt material from said fuse (10) in a radial direction;
-a ring (14), said ring (14) extending longitudinally between said wall (2) and said at least one metal tube (11) made of non-melt material and electrically insulating said at least one metal tube (11) made of non-melt material longitudinally from said wall (2).
3. Electric air heating device (1) according to claim 2, characterized in that said fastening washer (8), said fuse (10), said at least one metal tube (11) made of non-melt material and said at least one tubular insulating element (12) extend coaxially to said fastening shaft (9).
4. Electric air heating device (1) according to any one of claims 1 or 3, characterized in that said shut-off means (6) comprise a ring (14) made of an electrically insulating material with high compressive strength and extending longitudinally between said wall (2) and said fastening spacer.
5. Electrical air heating device (1) according to any of the claims 2 to 4, characterized in that said ring (14) is made of at least one ceramic material.
6. Air electric heating device (1) according to any of claims 1 to 5, characterized in that it comprises a cover (15), said cover (15) wrapping the outer portion of said fastening means (5) in order to collect the melted material of said fuse (10) so that the melted material of said fuse (10) is trapped inside said protective cover (15) regardless of the position of said fastening means (5).
7. Electrical air heating device (1) according to any of claims 1 to 6, characterized in that said fastening washer (8) is selected from the group formed by flat washers and spring washers.
8. Electric air heating device (1) according to any one of claims 1 to 7, characterized in that said fastening means (5) comprise a screw (22) and at least one nut (24), said at least one nut (24) cooperating with a threaded portion (23) of said electrically conductive shaft (9) of said screw (22) to fasten said at least one resistive strip (3) to said wall (2) of said casing.
9. Electric air heating device (1) according to any of claims 1-7, characterized in that the fastening means (5) comprise rivets.
10. Electric air heating device (1) according to any of claims 1-9, characterized in that the fastening shaft (9) of the fastening means is arranged to extend across a hole (21) formed in a wall (2) of the housing.
11. An engine comprising at least one electric air heating device (1) according to any one of claims 1 to 10.
12. A vehicle characterized by comprising the engine according to claim 11.
13. Vehicle according to claim 12, characterized in that it comprises at least one electric air heating device (1) according to any one of claims 1 to 10.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP19182028.1 | 2019-06-24 | ||
| EP19182028.1A EP3757379B1 (en) | 2019-06-24 | 2019-06-24 | Electric air heating device comprising a tightening device with integrated fuse, engine and vehicle comprising the same |
| PCT/EP2020/067486 WO2020260274A1 (en) | 2019-06-24 | 2020-06-23 | Electric air heating device comprising a tightening device with integrated fuse, engine and vehicle comprising the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114174667A true CN114174667A (en) | 2022-03-11 |
Family
ID=67145517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080045859.8A Withdrawn CN114174667A (en) | 2019-06-24 | 2020-06-23 | Electric air heating device comprising a fastening device with an integrated fuse, engine and vehicle comprising such an engine |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3757379B1 (en) |
| JP (1) | JP7496374B2 (en) |
| CN (1) | CN114174667A (en) |
| WO (1) | WO2020260274A1 (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB245581A (en) * | 1923-12-31 | 1926-01-14 | Wilhelm Hickel | Automatic excess heat protector, especially for electric machines and apparatus |
| CN1275184A (en) * | 1997-09-10 | 2000-11-29 | 菲利普＆特姆罗工业公司 | Air intake heater with vertically oriented heating elements |
| CN101375634A (en) * | 2006-01-30 | 2009-02-25 | 莱丹加工技术公司 | Heating element for a hot air device |
| FR2958074A1 (en) * | 2010-03-29 | 2011-09-30 | Ferraz Shawmut | Fuse for use in switch disconnector, has conducting solder fusible in event of prolonged elevation in temperature at level of striker unit, where softening or fusion of solder slackens tensile stress on spring |
| US20140159855A1 (en) * | 2011-08-18 | 2014-06-12 | Hidria Aet Druzba Za Proizvodnjo Vzignih Sistemov In Elektronike D.O.O. | Air heater fuse for diesel engines |
| CN104234881A (en) * | 2013-06-05 | 2014-12-24 | 友进工业株式会社 | Air heater of internal combustion engine |
| WO2015059435A1 (en) * | 2013-10-25 | 2015-04-30 | Ge Aviation Systems Limited | Electrical fastener assembly with thermal fuse |
| CN107709889A (en) * | 2015-06-24 | 2018-02-16 | 布莱克曼两合公司 | Terminating set for the tubulose firing equipment with integrated fuse |
| DE202018101141U1 (en) * | 2018-03-01 | 2018-03-09 | Türk & Hillinger GmbH | Electric heater |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007239645A (en) | 2006-03-09 | 2007-09-20 | Ngk Spark Plug Co Ltd | Air heater system for internal combustion engine |
| CN201037442Y (en) * | 2006-12-14 | 2008-03-19 | 菲利普斯&坦洛工业有限公司 | Heater and air intake assembly for internal combustion engine |
| CN204476643U (en) | 2015-02-11 | 2015-07-15 | 紫光汽车零部件襄阳有限公司 | A kind of engine cold-starting device being provided with safty device |
| US10344717B2 (en) * | 2017-07-31 | 2019-07-09 | Phillips & Temro Industries Inc. | Intake air heater assembly having insulated bushing |
-
2019
- 2019-06-24 EP EP19182028.1A patent/EP3757379B1/en active Active
-
2020
- 2020-06-23 JP JP2021576702A patent/JP7496374B2/en active Active
- 2020-06-23 CN CN202080045859.8A patent/CN114174667A/en not_active Withdrawn
- 2020-06-23 WO PCT/EP2020/067486 patent/WO2020260274A1/en active Application Filing
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB245581A (en) * | 1923-12-31 | 1926-01-14 | Wilhelm Hickel | Automatic excess heat protector, especially for electric machines and apparatus |
| CN1275184A (en) * | 1997-09-10 | 2000-11-29 | 菲利普＆特姆罗工业公司 | Air intake heater with vertically oriented heating elements |
| CN101375634A (en) * | 2006-01-30 | 2009-02-25 | 莱丹加工技术公司 | Heating element for a hot air device |
| FR2958074A1 (en) * | 2010-03-29 | 2011-09-30 | Ferraz Shawmut | Fuse for use in switch disconnector, has conducting solder fusible in event of prolonged elevation in temperature at level of striker unit, where softening or fusion of solder slackens tensile stress on spring |
| US20140159855A1 (en) * | 2011-08-18 | 2014-06-12 | Hidria Aet Druzba Za Proizvodnjo Vzignih Sistemov In Elektronike D.O.O. | Air heater fuse for diesel engines |
| CN104234881A (en) * | 2013-06-05 | 2014-12-24 | 友进工业株式会社 | Air heater of internal combustion engine |
| WO2015059435A1 (en) * | 2013-10-25 | 2015-04-30 | Ge Aviation Systems Limited | Electrical fastener assembly with thermal fuse |
| CN107709889A (en) * | 2015-06-24 | 2018-02-16 | 布莱克曼两合公司 | Terminating set for the tubulose firing equipment with integrated fuse |
| DE202018101141U1 (en) * | 2018-03-01 | 2018-03-09 | Türk & Hillinger GmbH | Electric heater |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3757379A1 (en) | 2020-12-30 |
| EP3757379B1 (en) | 2022-09-14 |
| JP2022544440A (en) | 2022-10-19 |
| JP7496374B2 (en) | 2024-06-06 |
| WO2020260274A1 (en) | 2020-12-30 |
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| PB01 | Publication | ||
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20220311 |
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