DE102004062977A1 - Combination of generator and plastic container body for production of alternating electromagnetic field, comprises heating zone with nanoferrite additives - Google Patents

Abstract

The generator and plastic container body (2) comprises plastic heating zone dispersed with nano-ferrite additives, a line section for an intake tract of a motor vehicle internal-combustion engine, and a connection for attaching a blow-by-channel. The zone (4) is: defined with an alternating field of the generator (3); formed by coating (5) of the body and/or forms an integral component of the body; formed as connecting piece, which is molded on the line section (7); and formed within a surface of the connecting piece. The container body is a housing of an oil filter or a fuel filter. A temperature is regulated in the permanently operated generator for the heating of the heat zone for obtaining a maximal temperature corresponding to Curie temperature. The maximum temperature lies below a limit temperature for the heating zone and the body. The body is a channel for hot air supply in a vehicle interior surface and for fluid flux and/or fluid storage. The generator is arranged at the outside of the container body and cast into the body.

Description

The The present invention relates to a combination of at least one body and at least one generator for generating an electromagnetic AC field.

Body that as vessels for fluid guidance and / or Fluid storage are designed to come in any technical Areas are used, especially in motor vehicles. While transporting of liquid Fluids, such as Lubricating oil or Fuel, it is desirable also at low ambient temperatures a sufficient flowability for the respective liquid guarantee to be able to. In particular, in motor vehicles with diesel engines, it can be at low Ambient temperatures cause the diesel fuel paraffins which quickly eliminates a fuel filter. remedy can here elaborate Bring heaters.

Of Further, it may be in wet gaseous fluids on cooling a dew formation and at appropriate temperatures also to a Ice formation in the respective vascular body come. This is for example in an intake tract of an internal combustion engine in the area of a junction a B1ow-by channel is problematic. The blow-by channel conducts moisture and relatively warm blow-by gases from an engine block to the intake tract. At low ambient temperatures, it comes in the mouth area the blow-by channel to a condensation and possibly to ice formation, which can lead to a blockage of the blow-by channel. When the discharge of the Blow-by gases out blocked the engine block, this can damage the Internal combustion engine lead. Again, it is possible with relatively complex measures, the mouth area to heat up the blow-by channel.

For example, it is from the DE 102 37 762 A1 It is known to integrate a heating wire in a connecting piece, which emits heat when it is energized, thereby preventing ice formation on the socket. The problem here is the installation of this connection piece in the intake system, since increased demands on the tightness must be made.

Out the homepage of the company SusTech GmbH & Co. KG, Darmstadt, it is under the address www.sustech.de/Bond Disbond2.htm known by a Heat activatable To provide adhesive with ferrite additives. During the bonding process provide the components to be bonded together with the adhesive and in the desired Position positioned relative to each other. With the help of a microwave generator then the adhesive can be irradiated to activate it. Microwave irradiation adds the added ferrite to the adhesive excited to high-frequency vibrations, resulting in heat dissipation into the adhesive. As a result, the adhesive on an activation temperature can be heated so that it in the subsequent reaction binds and hardens. As a result, an adhesive method is provided, which is a quasi any processing time for allowing the glue to work especially a clean and highly automated bonding is feasible.

The present invention employs dealing with the problem, for Body, exposed to their intended use undesirably low temperatures could be, a possibility indicate for at least local heating, in particular inexpensive is realizable and works very effectively.

This Problem is inventively the subject of the independent Claim solved. Advantageous embodiments are the subject of the dependent Claims.

The Invention is based on the general idea, the body at least with a heating zone of plastic provided with ferrite additives provided, this heating zone then with the help of an electromagnetic Alternating field heated can be generated by a corresponding generator. The invention thus combines a generator for generating a electromagnetic alternating field with a body, which is a heating zone Having provided with ferrite additives plastic, wherein the arrangement of body and Generator so chosen is that the alternating field of the generator to a warming of the Heating zone of the body leads. The inventive combination is characterized by a particularly simple manufacturability, because such a heating zone can be easily formed on the body. In particular, such a heating zone may be of any geometry. Furthermore, by a targeted positioning of the heating zone the heat be generated exactly where it is needed.

The ferrite additives are expediently nanoferrites, which are dispersedly distributed in the plastic of the respective heating zone. In such an embodiment, an efficient heating of the heating zone is expected in a Wechselfeldbeaufschlagung. At the same time, the nanoferrites are so small, virtually in the molecular range, that the processability and especially the sprayability of the plastic by the nanoferrites does not or not significantly is impaired.

Preferably the respective heating zone can be molded onto the body. at a plastic body This can be a proven in practice two-component injection molding come into application, in which in a mold in a first shot the plastic body is injected to the respective heating zone, while in a second shot the respective heating zone is injected. Basically, the plastic body in a second shot molded onto the previously sprayed heating zone become. In such an embodiment, the respective Heating zone are specified exactly what the targeted heating exclusively in the heating zone favors.

at an alternative embodiment can the whole body made of the plastic provided with the ferrite additives be, in which case the respective heating zone by the arrangement of at least one generator, so by the impact with is defined in the alternating field. This embodiment is simplified Although the production of the plastic body with integrated heating zone, however, the area heatable by the AC field loading can no longer be sharply defined. However, this allows embodiment an afterthought Position change of Heating zone and a subsequent Addition of more Heating zones by a corresponding positioning of the generator or addition other generators.

Of Further it is basically also possible, to form the respective heating zone in the form of a coating of the body.

The inventive combination is also particularly advantageous if the body as a vessel for fluid management, z. As pipe or pipe, and / or as a vessel for fluid storage, for. B. housing an oil filter, is designed. Because the heating zone is so easy in the formed respective body be that vase-like Body gas-tight and / or liquid-tight is. For example, the entire body is seamless from the with the Ferrite additives provided plastic. Likewise, the heating zone from the plastic provided with the ferrite additives readily gas and liquid tight at the rest body be sprayed.

Further important features and advantages of the invention will become apparent from the Dependent claims, from the drawings and from the associated description of the figures the drawings.

It it is understood that the above and the following yet to be explained features not only in the specified combination, but also in other combinations or alone, without to leave the scope of the present invention.

preferred embodiments The invention are illustrated in the drawings and in the following description explains where like reference numerals refer to the same or functionally same or similar Refer to components.

It show, in each case schematically,

1 to 5 highly simplified sectional views of combinations according to the invention in different embodiments.

According to the 1 to 5 comprises a combination according to the invention 1 at least one body 2 as well as at least one generator 3 , Which are positioned fixed to each other in the assembled state. In particular, bodies are 2 and generator 3 firmly connected. The generator 3 is designed so that it can generate an alternating electromagnetic field. Suitably, the alternating field is high-frequency, preferably in the microwave range, so that it is the generator 3 may preferably be a microwave generator.

Furthermore, the body points 2 at least one heating zone 4 on, which consists of a provided with ferrite additives plastic. The arrangement of the heating zone 4 on or in the body 2 as well as the positioning of the generator 3 relative to the body 2 are coordinated so that the heating zone 4 can be heated by exposure to the alternating field. The alternating field stimulates the plastic in the heating zone 4 integrated ferrite additives to high-frequency vibrations, resulting in a heat transfer to or in the plastic of the heating zone 4 leads.

The ferrite additives are preferably nanoferrites which are incorporated in the plastic of the heating zone 4 are introduced so that there is a disperse distribution for the nanoferrite.

The respective heating zone 4 For example, according to the variants of 1 and 3 to 5 to the body 2 be sprayed. Here is the heating zone 4 in the variants of 1 and 4 in the form of a coating 5 on the body 2 appropriate.

In contrast, the molded plastic forms the heating zone 4 in the embodiments of the 3 and 5 each one integral component 6 or section 6 of the body 2 ,

Basically, the body can 2 consist of any material, as long as no adverse interactions with the alternating field of the generator 3 are to be expected. Preferably, the body is made 2 however, from a plastic. In the embodiments of the 1 and 3 to 5 is doing for the preparation of the body 2 used a plastic that is free of ferrite additives. The for forming the at least one heating zone 4 to the plastic body 2 molded plastic can intensively with appropriately selected process parameters with the plastic body 2 connect. In particular, there is a fusion bond with a melting and diffusion in the contact area between the plastics. The production of the plastic body 2 with heating zone formed thereon 4 may preferably be carried out in a two-component injection molding process. For this purpose, preferably in a single tool with two separate shots of a plastic for molding the body 2 and the other, provided with the ferrite additives plastic for forming the at least one heating zone 4 injected into the mold.

In the embodiments of the 3 and 5 the injection molding of the respective heating zone takes place 4 forming component 6 appropriate so that between the body 2 and the heating zone 4 In addition, a positive connection results in what the strength of the connection between body 2 and heating zone 4 elevated.

It is clear that in another embodiment, the heating zone 4 by a separately made and attached to the body 2 grown component can be formed.

In the embodiments shown here, the body is 2 each designed as a vessel for fluid management or for fluid storage. For example, the embodiments of the 1 to 3 in each case about a line section fine in the otherwise not shown intake tract of an internal combustion engine, preferably in a motor vehicle. In contrast, it is in 4 in the body 2 around a housing 8th an oil filter or a fuel filter, in particular for an internal combustion engine. Further shows 5 a variant in which the body 2 a channel 17 for a hot air supply of a room, preferably a vehicle interior forms. Basically, however, is the body 2 can be configured arbitrarily, so that the embodiments explained in more detail here mean no restriction on the generality of the present invention.

In the vessel-like bodies shown here 2 is the respective generator 3 expedient outside of the body or vessel body 2 arranged. In this way, a direct contact between the in the respective body 2 transported or stored fluid with the generator 3 be avoided. 1 also shows another special variant, wel cher the respective generator 3 in the body 2 is poured. In this way, the combination according to the invention 1 particularly easy to be realized. Furthermore, their handling is simplified for the assembly of the combination 1 at the respective application site.

According to the 1 to 3 has the as a line section 7 trained body 2 a connection 9 on, with the help of a not shown blow-by channel to the line section 7 can be connected. Such a blow-by channel connects an engine block of the internal combustion engine with this line section 7 the intake tract of the internal combustion engine. In this way, blow-by gases accumulating in the engine block can be supplied via the intake air to the combustion in the internal combustion engine. These blow-by gases can be humid and are usually relatively warm. The blow-by gas flow is in the 1 to 3 through an arrow 10 symbolizes. Depending on the ambient conditions, this is in the line section 7 transported airflow, symbolized by arrows 11 , relatively cold. In the area of the connection 9 , ie in the area of a junction 12 in which the blow-by channel over the port 9 in the line section 7 Thus, it can lead to a cooling of the blow-by gases. As a result, in the blow-by gas flow 10 Condensed moisture condense, whereby they are usually in a mouth 12 enclosing wall portion of the pipe section 7 reflected. With a correspondingly cold fresh air flow 11 This rainfall can freeze as well. Without countermeasures, ice formation could progress so far that the muzzle 12 completely closed after some time.

According to the invention is now the at least one heating zone 4 in the area of the connection 9 , ie essentially in the area of the mouth 12 arranged. By a corresponding actuation of the generator 3 can the heating zone 4 be heated, which can effectively reduce the risk of ice formation. It is of particular importance that in the area of the connection 9 the tightness of the system is readily ensured, in particular no cables or the like. In the fluid-carrying region of the body 2 must be introduced.

At the in 1 the embodiment shown is the heating zone 4 essentially by an annular coating 5 trained, which the An Enough 9 or the mouth 12 inside the pipe section 7 encloses. In this way, the area which can be heated with the aid of the alternating field is locally precisely defined.

In the embodiment according to 2 is the whole body 2 So the whole line section 7 made of the plastic provided with the ferrite additives. Because here too the generator 3 in the area of the connection 9 so near the mouth 12 outside on the body 2 is arranged, encloses also here the heating zone 4 the estuary 12 , The local limit of the heating zone depends on this 4 essentially from the range of the alternating field and thus from the power and positioning of the generator 3 from.

The generator 3 Here is purely exemplary annular designed and encloses the connection 9 , It is clear that for the generator 3 Any suitable geometry and design can be used.

At the in 3 the embodiment shown is the terminal 9 through a neck 13 formed on the line section 7 So to the body 2 is injected. The stub 13 consists of the plastic provided with the ferrite additives and thus forms the heating zone 4 out. The local extent of the heating zone 4 depends in this embodiment on the one hand by the performance and positioning of the generator 3 from. On the other hand, the position of the heating zone 4 here as well by the geometry of the neck 13 which is suitably shaped so as to open the mouth 12 enclosing section 14 has, which may be configured in the manner of a flange. This is the heating zone 4 also in this embodiment positioned exactly where the risk of ice formation during operation of the internal combustion engine is greatest.

At the in 4 the embodiment shown is the heating zone 4 in that as a housing 8th designed body 2 positioned so that it is exposed during operation of each stored or guided liquid. The housing 8th contains, for example, a ring filter insert 15 which arrows according to the liquid to be cleaned 18 flows through from the outside to the inside. The heating zone 5 is here on the inner wall of the cylindrical housing 8th arranged. As an example, the heating zone 4 , as shown here, substantially the entire inner surface of the housing 8th cover or form. In this way, a relatively large area is provided for heating the liquid. As explained, this may be the case 8th an oil filter or the housing 8th act of a fuel filter. In the embodiment shown here, the generator 3 also exemplary configured as a ring, the housing 8th encloses circumferentially.

At low temperatures, a lubricating oil film to be formed with the aid of a lubricating oil can easily break off, which considerably reduces the lubricating effect. By a corresponding heating of the lubricating oil, the flowability and film formation of the lubricating oil can be correspondingly improved. The heating of the lubricating oil can by means of the combination according to the invention 1 z. B. in the area of the oil filter by the heating zone 4 with the help of the generator 3 is excited to give off heat.

In the case of a fuel filter, diesel fuel, which precipitates paraffins at low temperatures, may clog the filter body 15 be reduced or avoided by the excreted paraffins. The integration of the heating zone 4 in the case 8th and the heating of the fuel thus reduces the paraffin excretion and attachment to the filter body 15 ,

According to 5 can the ingredient 6 or section 6 as a channel 17 designed body 2 consist of the provided with the ferrite additives plastic, which in this section 6 the heating zone 4 is integrated respectively what makes this section 6 the heating zone 4 forms. The heating zone 4 is in the channel 17 arranged so that it is exposed to the air to be heated. In 5 is an air flow through an arrow 16 symbolizes. In this way it is with the help of the combination according to the invention 1 particularly easy, passing through the channel 17 to heat up flowing air. Appropriately, the channel 17 thus form part of a hot air supply, with the help of a room, preferably a vehicle interior, can be supplied with hot air. This one in the body 2 integrated section 6 is designed as a channel section, which virtually into the rest of the channel 17 is used. The generator 3 Here, too, is designed in an exemplary annular shape and surrounds the section 6 annular.

A particular advantage of the combination according to the invention 1 is seen, inter alia, in that the heating zone 4 can be provided with a virtually arbitrary geometric shape, whereby it is possible to generate the heat exactly where it is needed.

Another important advantage of the combination according to the invention 1 is seen in that for the heating of the heating zone 4 With particularly simple means a temperature control can be realized. One property of the ferrite additives is that they have a Curie temperature. Accordingly, the ferrite additives are ferromagnetic to their Curie temperature, while those above the Curie temperature are no longer magnetizable. This means that at low temperatures up to the Curie tem temperature the electromagnetic alternating field can stimulate the ferrite additives to dissipate heat. When the Curie temperature is reached, the alternating field can no longer excite the ferrite additives, so that a further increase in temperature via the alternating field is not possible. As a result, therefore, the generator 3 be permanently operated, whereby it permanently generates the electromagnetic alternating field. As a result, the ferrite additives are excited to vibrate and thus to dissipate heat. As a result, there is a warming, so temperature increase of the heating zone 4 , However, the temperature increase is limited by the Curie temperature of the ferrite additives, since there the combination according to the invention 1 automatically adjusted.

Preferably, the ferrite additives are now selectively doped so that their Curie temperature corresponds to a predetermined maximum temperature. This maximum temperature is expediently less than a limit temperature that is appropriate for the body 2 and / or for the heating zone 4 just still permissible temperature range limited upwards. Preferably, the maximum temperature is also chosen so that it corresponds to a desired temperature control target, with the aid of the combination according to the invention 1 in the respective heating zone 4 should be adjusted.

For example, in the embodiments, this maximum temperature is 1 to 3 , ie at the transition between the blow-by channel and the line section 7 about + 20 ° C. This way, in the area of the connection 9 the risk of ice formation is effectively reduced. For a fuel filter, the maximum temperature may also be selected at about + 20 ° C to avoid paraffin precipitation in the diesel fuel.

at an oil filter It may be appropriate, the Maximum temperature to about + 80 ° C adjust as much as possible Great To achieve lubricating film.

The with the aid of the combination according to the invention 1 achievable temperature control impresses with its simplicity and its low cost feasibility.

Claims (16)

Combination of at least one body ( 2 ) and at least one generator ( 3 ) for generating an alternating electromagnetic field, wherein the body ( 2 ) at least one by application of the alternating field of the generator ( 3 ) heatable heating zone ( 4 ) has a plastic provided with ferrite additives. Combination according to claim 1, characterized in that the ferrite additives are formed by nanoferrites which in the plastic of the at least one heating zone ( 4 ) are dispersed. Combination according to claim 1 or 2, characterized in that the at least one heating zone ( 4 ) to the body ( 2 ) is injected. Combination according to one of Claims 1 to 3, characterized in that the body ( 2 ) consists of a plastic. Combination according to claim 4, characterized in that the whole body ( 2 ) consists of the plastic provided with the ferrite additives and the at least one heating zone ( 4 ) by being exposed to the alternating field of the generator ( 3 ) is defined. Combination according to claim 4, characterized in that the plastic of the body ( 2 ) is free of ferrite additives and the ferrite-added plastic of the at least one heating zone ( 4 ) to the body ( 2 ) is injected. Combination according to one of claims 1 to 6, characterized in that - the at least one heating zone ( 4 ) by a coating ( 5 ) of the body ( 2 ) is formed with the plastic provided with the ferrite additives, and / or - that the at least one heating zone ( 4 ) an integral part ( 6 ) of the body ( 2 ). Combination according to one of claims 1 to 7, characterized in that for the heating of the at least one heating zone ( 4 ) with permanently operated generator ( 3 ) a temperature control is realized in that the ferrite additives are doped to achieve a predetermined maximum temperature corresponding Curie temperature. Combination according to claim 8, characterized in that the maximum temperature below a threshold temperature for the at least one heating zone ( 4 ) and for the body ( 2 ) lies. Combination according to one of Claims 1 to 9, characterized in that the body ( 2 ) is a vessel for fluid guidance and / or fluid storage. Combination according to claim 10, characterized in that the generator ( 3 ) on the outside of the vessel body ( 2 ) is arranged. Combination according to one of Claims 1 to 11, characterized in that the generator ( 3 ) in the body ( 2 ) is poured. Combination according to one of Claims 1 to 12, characterized in that the body ( 2 ) a line section ( 7 ) for an intake tract of an internal combustion engine, in particular in a motor vehicle, having a connection ( 9 ) for connecting a blow-by channel, wherein the at least one heating zone ( 4 ) in the area of the terminal ( 9 ) is trained. Combination according to claim 13, characterized in that the heating zone ( 4 ) as a nozzle ( 13 ) which is connected to the line section ( 7 ) and the connection ( 9 ). Combination according to one of claims 1 to 12, characterized in that the body ( 2 ) a housing ( 8th ) of an oil filter or a fuel filter, wherein the at least one heating zone ( 4 ) is exposed to the oil or fuel. Combination according to one of Claims 1 to 12, characterized in that the body ( 2 ) a channel ( 17 ) for a hot air supply of a room, in particular a vehicle interior, wherein the at least one heating zone ( 4 ) is exposed to the air to be heated.