CN113597029B - Electromagnetic field restraint for flexible resistive heating device and heating pad using same - Google Patents
Electromagnetic field restraint for flexible resistive heating device and heating pad using same Download PDFInfo
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- CN113597029B CN113597029B CN202110774103.3A CN202110774103A CN113597029B CN 113597029 B CN113597029 B CN 113597029B CN 202110774103 A CN202110774103 A CN 202110774103A CN 113597029 B CN113597029 B CN 113597029B
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 193
- 230000005672 electromagnetic field Effects 0.000 title claims abstract description 96
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- 239000011521 glass Substances 0.000 claims description 11
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- 230000000903 blocking effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
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Classifications
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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
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/06—Control, e.g. of temperature, of power
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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
- H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
- H05B3/34—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs
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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
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Resistance Heating (AREA)
- Air-Conditioning For Vehicles (AREA)
- Thermistors And Varistors (AREA)
Abstract
The present application provides an electromagnetic field restraint assembly for a flexible resistive heating device, the flexible resistive heating device comprising: the flexible pad body and adhere to the resistive wire of distributing of flexible pad body form and arrange, the resistive wire possesses current input and output, includes: the first access end and the first extraction end are respectively and electrically connected with the input end and the output end and are positioned in the wiring area; and a first capacitive element disposed across the first access terminal and the first extraction terminal; and the electrodes at two ends of the first capacitive element are respectively electrically connected with the first access end and the first extraction end, and the first capacitive element and the resistive heating device which are arranged in parallel can block an electromagnetic field generated by the resistive heating device.
Description
Technical Field
The disclosure specifically discloses an electromagnetic field restraint assembly for a flexible resistive heating device and a heating pad employing the assembly.
Background
In recent years, with rapid development of electronic and communication technologies and continuous improvement of health consciousness, electromagnetic radiation is becoming a focus of attention. Scientific experiments show that excessive electromagnetic radiation has a certain injury effect on human bodies, and a plurality of international and national documents prescribe human body safety limits of electromagnetic exposure, such as: the electromagnetic field exposure limit defined by the international standard ICNIRP is 100%.
Currently, when designing automobile parts, for example: the interior planar heating assembly of a vehicle (including both the vehicle seat heating pad and the vehicle steering wheel heating pad) also needs to take into account whether the electromagnetic field exposure limit defined by the international standard ICNIRP is exceeded. The planar resistance wire heating device in the automobile is often used for controlling the on-off of current in the resistance wire type resistance elements distributed and arranged in a distributed mode, so that the heating effect is controlled, after the resistance wire type resistance elements distributed and arranged in a distributed mode are supplied with current, free electron directional movement is generated in the resistance elements relatively arranged in a surrounding mode to generate an electric field, and the changed electric field generates a magnetic field. The magnetic field, which propagates in wave form, is in close spatial contact with the seat user. If the human body is in an environment that the exposure value of the magnetic field exceeds the limit value of the exposure value of the electromagnetic field for a long time, certain damage to the body of the user can be caused. In order to minimize the damage to the human body during the use of the planar heating assembly, it is desirable to develop an electromagnetic restraint assembly for the planar heating assembly.
Disclosure of Invention
The present application aims to provide an electromagnetic restraint assembly that minimizes the damaging effects on a user during use of a resistive heating device, as compared to the prior art.
In a first aspect, an electromagnetic field containment assembly for a flexible resistive heating apparatus, the flexible resistive heating apparatus comprising: the flexible pad body and adhere to the resistive wire of distributing of flexible pad body form and arrange, the resistive wire possesses current input and output, includes: the first access end and the first extraction end are respectively and electrically connected with the input end and the output end and are positioned in the wiring area; and a first capacitive element disposed across the first access terminal and the first extraction terminal; and the electrodes at two ends of the first capacitive element are respectively electrically connected with the first access end and the first extraction end, and the first capacitive element and the resistive heating device which are arranged in parallel can block an electromagnetic field generated by the resistive heating device.
According to the technical scheme provided by the embodiment of the application, the method further comprises the following steps: a second inlet and a second outlet electrically connected to the input and output, respectively, and located on the wire harness assembly area; and a second capacitive element disposed across the beam assembly between the second access terminal and the second exit terminal.
According to the technical scheme provided by the embodiment of the application, the method further comprises the following steps: a third access terminal and a third exit terminal electrically connected to the input terminal and the output terminal, respectively, and located in the connector region; and a third capacitive element disposed across the connector between the third access terminal and the third exit terminal.
According to the technical scheme provided by the embodiment of the application, the first capacitance element or the second capacitance element or the third capacitance element are respectively a capacitance unit; or, at least two capacitance units connected in parallel with each other; or, at least two capacitor units connected in series with each other.
According to the technical scheme provided by the embodiment of the application, the method further comprises the following steps: a fourth capacitive element spanning between the first access terminal and the middle of the resistive wire, and/or a fifth capacitive element spanning between the first extraction terminal and the middle of the resistive wire.
According to the technical scheme provided by the embodiment of the application, the protection resistor connected in series with the first capacitive element is further included, and the protection resistor can be a resistor unit, or at least two parallel resistor units, or at least two resistor units connected in series with each other.
According to the technical scheme provided by the embodiment of the application, the capacitor unit is a ceramic capacitor, a polyester capacitor, a tantalum capacitor, a glass capacitor or an electrolytic capacitor.
According to the technical scheme provided by the embodiment of the application, the capacitance value of the capacitor unit is more than or equal to 0.1 mu F and less than or equal to 47 mu F.
In summary, the first aspect discloses a specific structure of an electromagnetic field restraint assembly for a flexible resistive heating device, in which a first access terminal and a first extraction terminal are added in a wiring area, and a first capacitive element is added between the first access terminal and the first extraction terminal, so that the first capacitive element and the resistive heating device which are arranged in parallel can block a magnetic field generated by the resistive heating device. The second connecting end and the second leading-out end are additionally arranged on the wire harness assembly area, and the second capacitive element is additionally arranged between the second connecting end and the second leading-out end, so that the second capacitive element and the resistive heating device which are arranged in parallel can block a magnetic field generated by the resistive heating device. The first capacitor element and the second capacitor element are designed to strengthen the effect of blocking the magnetic field generated by the resistive heating device. The third connecting end and the third leading-out end are additionally arranged in the connector area, and the third capacitive element is additionally arranged between the third connecting end and the third leading-out end, so that the third capacitive element and the resistive heating device which are arranged in parallel can block a magnetic field generated by the resistive heating device. The design of the first, second and third capacitive elements, or the design of the first and third capacitive elements, can enhance the effect of blocking the magnetic field generated by the resistive heating device.
In a second aspect, an electromagnetic field containment assembly for a flexible resistive heating apparatus, the flexible resistive heating apparatus comprising: the flexible pad body and the resistive wire of attaching at the distributed of the flexible pad body of arranging, the resistive wire possesses current input end and output, still includes: a second inlet and a second outlet electrically connected to the input and output, respectively, and located on the wire harness assembly area; and a second capacitive element disposed across the beam assembly between the second access terminal and the second exit terminal; the electrodes at two ends of the second capacitance element are respectively and electrically connected with the first access end and the first extraction end; the second capacitive element and the resistive heating device which are arranged in parallel can block the magnetic field generated by the resistive heating device.
According to the technical scheme provided by the embodiment of the application, the method further comprises the following steps: a third access terminal and a third exit terminal electrically connected to the input terminal and the output terminal, respectively, and located in the connector region; and a third capacitive element disposed across the connector between the third access terminal and the third exit terminal.
According to the technical scheme provided by the embodiment of the application, the first capacitance element or the second capacitance element or the third capacitance element are respectively a capacitance unit; or, at least two capacitance units connected in parallel with each other; or, at least two capacitor units connected in series with each other.
According to the technical scheme provided by the embodiment of the application, the protection resistor connected in series with the second capacitive element is further included, and the protection resistor can be a resistor unit, or at least two parallel resistor units, or at least two resistor units connected in series.
According to the technical scheme provided by the embodiment of the application, the capacitor unit is a ceramic capacitor, a polyester capacitor, a tantalum capacitor, a glass capacitor or an electrolytic capacitor.
According to the technical scheme provided by the embodiment of the application, the capacitance value of the capacitor unit is more than or equal to 0.1 mu F and less than or equal to 47 mu F.
In summary, the second aspect discloses a specific structure of an electromagnetic field restraint assembly for a flexible resistive heating device, which adds a second access end and a second extraction end on a beam assembly area and adds a second capacitive element between the second access end and the second extraction end, so that the second capacitive element and the resistive heating device which are arranged in parallel can block a magnetic field generated by the resistive heating device. The third connecting end and the third leading-out end are additionally arranged in the connector area, and the third capacitive element is additionally arranged between the third connecting end and the third leading-out end, so that the third capacitive element and the resistive heating device which are arranged in parallel can block a magnetic field generated by the resistive heating device. The design of the second capacitor element and the third capacitor element can strengthen the effect of blocking the magnetic field generated by the resistive heating device.
In a third aspect, an electromagnetic field containment assembly for a flexible resistive heating apparatus, the flexible resistive heating apparatus comprising: the flexible pad body and the resistive wire of attaching at the distributed of the flexible pad body of arranging, the resistive wire possesses current input end and output, still includes: a third access terminal and a third exit terminal electrically connected to the input terminal and the output terminal, respectively, and located in the connector region; and a third capacitive element disposed across the connector between the third access terminal and the third exit terminal; the electrodes at the two ends of the third capacitance element are respectively and electrically connected with the first access end and the first extraction end; the third capacitive element and the resistive heating device which are arranged in parallel can block the magnetic field generated by the resistive heating device.
According to the technical scheme provided by the embodiment of the application, the first capacitance element or the second capacitance element or the third capacitance element are respectively a capacitance unit; or, at least two capacitance units connected in parallel with each other; or, at least two capacitor units connected in series with each other.
According to the technical scheme provided by the embodiment of the application, the protection resistor connected in series with the third capacitive element is further included, and the protection resistor can be a resistor unit, or at least two parallel resistor units, or at least two resistor units connected in series with each other.
According to the technical scheme provided by the embodiment of the application, the capacitor unit is a ceramic capacitor, a polyester capacitor, a tantalum capacitor, a glass capacitor or an electrolytic capacitor.
According to the technical scheme provided by the embodiment of the application, the capacitance value of the capacitor unit is more than or equal to 0.1 mu F and less than or equal to 47 mu F.
In summary, the third aspect discloses a specific structure of an electromagnetic field restraint assembly for a flexible resistive heating device, which adds a third access terminal and a third extraction terminal in a connector area and adds a third capacitive element between the third access terminal and the third extraction terminal, so that the third capacitive element and the resistive heating device which are arranged in parallel can block a magnetic field generated by the resistive heating device.
On the other hand, the application also provides a seat heating pad applying the electromagnetic field restraint assembly.
A seat heating mat comprising an electromagnetic field restraint assembly for a flexible resistive heating device as set forth in the first, second and third aspects.
On the other hand, the application also provides a steering wheel heating pad applying the electromagnetic field restraint assembly.
A steering wheel heating pad comprising an electromagnetic field restraint assembly for a flexible resistive heating apparatus as defined in the first, second and third aspects.
The application also discloses a seat heating pad and a steering wheel heating pad which are provided with the electromagnetic field restraint assembly, and the electromagnetic exposure values generated by the seat heating pad and the steering wheel heating pad can be effectively reduced in the using process of the seat heating pad and the steering wheel heating pad.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the accompanying drawings in which:
FIG. 1 is a schematic diagram of a prior art flexible resistive heating system;
FIG. 2 is one embodiment of an electromagnetic field restraint assembly for a flexible resistive heating apparatus;
FIG. 2a is one embodiment of an electromagnetic field restraint assembly for a flexible resistive heating apparatus;
FIG. 2b is one embodiment of an electromagnetic field restraint assembly for a flexible resistive heating apparatus;
FIG. 2c is one embodiment of an electromagnetic field restraint assembly for a flexible resistive heating apparatus;
FIG. 2d is one embodiment of an electromagnetic field restraint assembly for a flexible resistive heating apparatus;
FIG. 3 is one embodiment of an electromagnetic field restraint assembly for a flexible resistive heating apparatus;
FIG. 4 is one embodiment of an electromagnetic field restraint assembly for a flexible resistive heating apparatus;
FIG. 5 is one embodiment of an electromagnetic field restraint assembly for a flexible resistive heating apparatus;
FIG. 6 is one embodiment of an electromagnetic field restraint assembly for a flexible resistive heating apparatus;
FIG. 7 is one embodiment of an electromagnetic field restraint assembly for a flexible resistive heating apparatus;
FIG. 8 is one embodiment of an electromagnetic field restraint assembly for a flexible resistive heating apparatus;
FIG. 9 is one application scenario of an electromagnetic field restraint assembly for a flexible resistive heating device;
FIG. 10 is one application scenario of an electromagnetic field restraint assembly for a flexible resistive heating device;
FIG. 11 is a schematic diagram of an electromagnetic field restraint assembly for a flexible resistive heating apparatus;
FIG. 12 is one embodiment of an electromagnetic field restraint assembly for a flexible resistive heating apparatus.
Detailed Description
The application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be noted that, for convenience of description, only the portions related to the application are shown in the drawings.
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
Referring to fig. 1, the flexible resistive heating system includes: the flexible resistive heating device and the connecting component connected with the flexible resistive heating device.
The flexible resistive heating apparatus includes: the flexible pad 10 and the distributed resistive wires 11 attached to the flexible pad 10.
The connection assembly includes: a harness assembly 12 electrically connected with the resistive wire 11, and a connector 13 electrically connected with the harness assembly 12 for mating with a power supply device or other electrical components.
Wherein:
The area of the flexible mat 10 to which the harness assembly is connected is a wiring area a.
The area within the wire harness assembly 12 is a wire harness assembly area B.
The position where the connector 13 is connected to the harness assembly 12 is a connector area C.
The present embodiments are directed to an electromagnetic field restraint assembly that minimizes the damaging effects on a user during use of a resistive heating device as compared to the prior art.
Embodiment 1:
Referring to fig. 2, an electromagnetic field restraint assembly for a flexible resistive heating apparatus comprising: the flexible pad body and adhere to the resistive wire of distributing of flexible pad body form and arrange, the resistive wire possesses current input 14 and output 15, its characterized in that includes: a first inlet 21 and a first outlet 22 electrically connected to the input 14 and the output 15, respectively, and located in the junction area; and a first capacitive element 20 provided across the first access terminal 21 and the first extraction terminal 21; the electrodes at both ends of the first capacitive element 20 are electrically connected to the first access terminal 21 and the first extraction terminal 22, respectively, and the first capacitive element 20 and the resistive heating device arranged in parallel can block an electromagnetic field generated by the resistive heating device.
One embodiment of an electromagnetic field restraint assembly is shown in FIG. 2. The electromagnetic field restraint assembly for a flexible resistive heating apparatus in this embodiment includes:
the first access terminal 21 is adapted to be connected to the current input terminal 14 of the resistive heating means, and may be in particular a wire structure.
The first outlet 22 is adapted to be connected to the current output 15 of the resistive heating means, and may in particular be a wire structure.
The first capacitor element 20 spans between the first access terminal 21 and the first extraction terminal 22, and specifically, the first capacitor element 20 is a ceramic capacitor, a polyester capacitor, a tantalum capacitor, a glass capacitor, or an electrolytic capacitor.
Reference is preferably made to the schematic circuit diagram shown in fig. 11 and the schematic structural diagram shown in fig. 12. Also included is a protection resistor 80 in series with the first capacitive element 20, which may be a single resistor unit, or at least two resistor units in parallel, or at least two resistor units in series with each other. The design of the protection resistor can strengthen the protection of the first capacitance unit, and preferably, the resistance value of the protection resistor is 6-10 times, preferably 8 times, the equivalent resistance value of the flexible resistive heating device.
One embodiment of an electromagnetic field restraint assembly is shown in FIG. 2 d. On the basis of fig. 2, the capacitor further comprises a first capacitor element crossing between the first access terminal 21 and the first extraction terminal 22, and further comprises: a fourth capacitive element 60 spanning between the first access terminal 21 and the middle of the resistive wire and/or a fifth capacitive element 70 spanning between the first exit terminal 22 and the middle of the resistive wire. Based on the design, the whole filtering loop is divided into a plurality of independent loops, and the capacitor of each independent loop filters the loop, so that the filtering quality is improved.
Specifically, the first capacitive element is a capacitive unit; or, at least two capacitance units connected in parallel with each other are shown in fig. 2 a; or at least two capacitive units connected in series with each other as shown in fig. 2 b.
Preferably, referring to fig. 2c, under the design of fig. 2a, at least two capacitors may be connected in series on a single parallel branch.
Preferably, the capacitance value of the capacitance unit is 0.1 μf or more and 47 μf or less.
Based on the above design, at the connection area a, the first capacitive element 20 and the resistive heating device form a parallel connection relationship, and in the energized state, since the capacitor has the property of passing alternating current and blocking direct current, the first capacitive element 20 and the resistive wire can form an equivalent RC filter circuit, and a part of electromagnetic field is filtered by filtering, so that the exposure value of the electromagnetic field is reduced.
In the prior art, a method for reducing the exposure value of the electromagnetic field is to coat a surface layer with a magnetism isolating function on the surface of the resistive heating device, so that the heating effect of the resistive heating device is similarly reduced, and the use is affected. For this reason, the present embodiment specifically gives the above embodiments so as to solve the above technical problems.
Furthermore, the RC filter circuit formed by the first capacitive element 20 and the resistive heating means arranged in parallel at the connection area a is totally different from its application effect in the prior art, and no technical teaching is given in the prior art for solving the above-mentioned problems.
In practical applications, the low frequency wave F (about: 0-100 Hz) is generated by testing the resistive heating device, and the capacitance is generally greater than or equal to 0.1 μf and less than or equal to 47 μf by measuring the resistance of the resistive heating device using the formula c=1/(2pi fR).
In particular, the first capacitive element 20 of the present embodiment may also be applied to other flexible resistive heating device scenarios, such as the printed resistive heating device shown in figure 9,
Referring to fig. 9, the printed resistive heating system includes: the flexible resistive heating device and the connecting component connected with the flexible resistive heating device.
The flexible resistive heating apparatus includes: the printing pad body 10', the heating electrode strips 14' which are printed on the printing pad body 10' and are symmetrically distributed, and the heating cover bodies 11' which are connected between the heating electrode strips 14' and are distributed.
The connection assembly includes: a harness assembly 12 'electrically connected to the heat-generating electrode strip 14' and a connector 13 'electrically connected to the harness assembly 12' for mating with a power supply device or other electrical component.
Wherein:
the area of the printed pad 10' to which the wire harness assembly is connected is a wiring area a.
The area within the wire harness assembly 12' is the wire harness assembly area B.
The position where the connector 13 'is connected to the harness assembly 12' is a connector area C.
Specifically, the first capacitive element 20 in the present embodiment may also be applied to other flexible resistive heating devices, such as a carbon fiber type flexible resistive heating device as shown in fig. 10.
Referring to fig. 10, the carbon fiber type flexible resistive heating apparatus includes: the flexible resistive heating device and the connecting component connected with the flexible resistive heating device.
The flexible resistive heating apparatus includes: the flexible pad body 10 ', electrodes 14' which are printed on the flexible pad body 10 ' and are symmetrically distributed, and conductive fiber screens 11 ' which are connected between the electrodes 14' and are distributed.
The connection assembly includes: a wire harness assembly 12 "electrically connected to the electrode 14" and a connector 13 "electrically connected to the wire harness assembly 12" for mating with a power supply device or other electrical component.
Wherein:
the area of the flexible mat 10 "to which the harness assembly is connected is the wiring area a.
The area within the wire harness assembly 12 "is the wire harness assembly area B.
The position where the connector 13 "is connected to the harness assembly 12" is a connector area C.
Embodiment 2:
referring to fig. 3, unlike the embodiment, the present embodiment further includes: a second inlet and a second outlet electrically connected to the input and output, respectively, and located on the wire harness assembly area; a second capacitive element is disposed across the beam assembly between the second input and the second output.
In fig. 3, a second capacitive element 30 is disposed in the wire harness assembly area and spans between the second access terminal 31 and the second extraction terminal 32, specifically, the second capacitive element 30 is a ceramic capacitor, a polyester capacitor, a tantalum capacitor, a glass capacitor, or an electrolytic capacitor. Specifically, the second capacitive element 30 is a capacitive unit; or, at least two capacitance units connected in parallel with each other; or, at least two capacitor units connected in series with each other. Preferably, the capacitance value of the capacitance unit is 0.1 μf or more and 47 μf or less.
Based on the above design:
At the connection area a, the first capacitive element 20 and the resistive heating device form a parallel connection relationship, and in the energized state, since the capacitor has the property of passing alternating current and resisting direct current, the capacitor and the heating wire can form an equivalent RC filter circuit, and a part of electromagnetic field is filtered by filtering, so that the exposure value of the electromagnetic field is reduced.
The second capacitive element 30 added at the beam assembly area B and the resistive heating means and the first capacitive element form a parallel relationship, and in this application, the first capacitive element 20 and the second capacitive element 30 form a parallel relationship, and the capacitance values may be the same or different. The resistance heating device can enable the capacitor and the heating wire to form an equivalent RC filter circuit, and a part of electromagnetic field is filtered through filtering, so that the exposure value of the electromagnetic field is reduced. The main function of setting different capacitance values is to filter electromagnetic fields of different wave bands.
Preferably, a protection resistor is further included in series with the second capacitive element 30, and the protection resistor may be one resistor unit, or at least two resistor units connected in parallel, or at least two resistor units connected in series with each other. The design of the protection resistor can enhance the protection of the second capacitive element 30, preferably the resistance of the protection resistor is 6-10 times, preferably 8 times, the equivalent resistance of the flexible resistive heating means.
Embodiment 3:
referring to fig. 4, unlike the embodiment, the present embodiment further includes: a third access terminal 41 and a third exit terminal 42 electrically connected to the input terminal and the output terminal, respectively, and located in the connector region; and a third capacitive element 40 disposed across the connector between the third access terminal and the third exit terminal.
In fig. 4, a third capacitive element 40 is disposed in the wire harness assembly area and spans between a third access terminal 41 and a third extraction terminal 42, specifically, the third capacitive element 40 is a ceramic capacitor, a polyester capacitor, a tantalum capacitor, a glass capacitor, or an electrolytic capacitor. Specifically, the third capacitive element 40 is a capacitive unit; or, at least two capacitance units connected in parallel with each other; or, at least two capacitor units connected in series with each other.
Based on the above design:
At the connection area a, the first capacitive element 20 and the resistive heating device form a parallel connection relationship, and in the energized state, since the capacitor has the property of passing alternating current and resisting direct current, the capacitor and the heating wire can form an equivalent RC filter circuit, and a part of electromagnetic field is filtered by filtering, so that the exposure value of the electromagnetic field is reduced.
In the connector area C, the third capacitor element 40 is added, and the resistive heating device and the first capacitor element form a parallel relationship, where the first capacitor element 20 and the third capacitor element 40 form a parallel relationship to form an equivalent capacitance, and where the first capacitor element 20 and the third capacitor element 40 form a parallel relationship, and the capacitance values may be the same or different. The resistance heating device can enable the capacitor and the heating wire to form an equivalent RC filter circuit, and a part of electromagnetic field is filtered through filtering, so that the exposure value of the electromagnetic field is reduced. The main function of setting different capacitance values is to filter electromagnetic fields of different wave bands.
Preferably, a protection resistor is further included in series with the third capacitive element 40, and the protection resistor may be one resistor unit, or at least two resistor units connected in parallel, or at least two resistor units connected in series with each other. The design of the protection resistor can enhance the protection of the third capacitive element 40, preferably the resistance of the protection resistor is 6-10 times, preferably 8 times, the equivalent resistance of the flexible resistive heating means.
Optionally, referring to fig. 5, unlike the first embodiment, the present embodiment further includes: a second inlet and a second outlet electrically connected to the input and output, respectively, and located on the wire harness assembly area; a second capacitive element is disposed across the beam assembly between the second input and the second output.
And a third inlet 41 and a third outlet 42 electrically connected to the input and output, respectively, and located in the connector area; and a third capacitive element 40 disposed across the connector between the third access terminal and the third exit terminal.
Based on the above design:
At the connection area a, the first capacitive element 20 and the resistive heating device form a parallel connection relationship, and in the energized state, since the capacitor has the property of passing alternating current and blocking direct current, the capacitor and the heating wire of the heating pad body can form an equivalent RC filter circuit, and a part of electromagnetic field is filtered by filtering, so that the exposure value of the electromagnetic field is reduced.
A second capacitive element 30 added at the beam assembly region B; at the connector region C, a third capacitive element 40 is added. The second capacitive element 30, the third capacitive element 40, the first capacitive element and the resistive heating device form a parallel relationship, and in this application, the second capacitive element 30, the third capacitive element 40 and the first capacitive element form a parallel relationship to form an equivalent capacitance, so that the capacitance and the resistive heating device form an equivalent RC filter circuit, and a part of electromagnetic field is filtered by filtering, thereby reducing the exposure value of the electromagnetic field.
Embodiment 4:
An electromagnetic field containment assembly for a flexible resistive heating apparatus, the flexible resistive heating apparatus comprising: the flexible pad body and the resistive wire of attaching at the distributed of the flexible pad body of arranging, the resistive wire possesses current input end and output, still includes: a second inlet and a second outlet electrically connected to the input and output, respectively, and located on the wire harness assembly area; and a second capacitive element disposed across the beam assembly between the second access terminal and the second exit terminal; the electrodes at two ends of the second capacitance element are respectively and electrically connected with the first access end and the first extraction end; the second capacitive element and the resistive heating device which are arranged in parallel can block the magnetic field generated by the resistive heating device.
Referring to fig. 6, a parallel relationship is formed between the added second capacitive element 30 and the resistive heating device in the beam assembly region B, and in this application, the second capacitive element 30 and the resistive heating device can form an equivalent RC filter circuit with the capacitor and the heating wire, and a part of the electromagnetic field is filtered by filtering, so as to reduce the exposure value of the electromagnetic field.
Preferably, a protection resistor is further included in series with the second capacitive element 30, and the protection resistor may be one resistor unit, or at least two resistor units connected in parallel, or at least two resistor units connected in series with each other. The design of the protection resistor can enhance the protection of the second capacitive element 30, preferably the resistance of the protection resistor is 6-10 times, preferably 8 times, the equivalent resistance of the flexible resistive heating means.
Embodiment 5:
Referring to fig. 7, unlike the fourth embodiment, the present embodiment further includes: a third access terminal and a third exit terminal electrically connected to the input terminal and the output terminal, respectively, and located in the connector region; and a third capacitive element disposed across the connector between the third access terminal and the third exit terminal.
In the connector area C, the third capacitor element 40 is added, and the resistive heating device and the second capacitor element form a parallel relationship, and in this application, the second capacitor element 30 and the third capacitor element 40 form a parallel relationship to form an equivalent capacitor, so that the capacitor and the resistive heating device can form an equivalent RC filter circuit, and a part of electromagnetic field is filtered by filtering, thereby reducing the exposure value of the electromagnetic field.
Preferably, a protection resistor is further included in series with the third capacitive element 40, and the protection resistor may be one resistor unit, or at least two resistor units connected in parallel, or at least two resistor units connected in series with each other. The design of the protection resistor can enhance the protection of the third capacitive element 40, preferably the resistance of the protection resistor is 6-10 times, preferably 8 times, the equivalent resistance of the flexible resistive heating means.
Specifically, the second capacitance element or the third capacitance element is a capacitance unit respectively; or, at least two capacitance units connected in parallel with each other; or, at least two capacitor units connected in series with each other.
Specifically, the capacitance unit is a ceramic capacitor, a polyester capacitor, a tantalum capacitor, a glass capacitor or an electrolytic capacitor.
Embodiment 6:
Referring to fig. 8, an electromagnetic field restraint assembly for a flexible resistive heating apparatus, the flexible resistive heating apparatus comprising: the flexible pad body and the resistive wire of attaching at the distributed of the flexible pad body of arranging, the resistive wire possesses current input end and output, still includes: a third access terminal and a third exit terminal electrically connected to the input terminal and the output terminal, respectively, and located in the connector region; and a third capacitive element disposed across the connector between the third access terminal and the third exit terminal; the electrodes at the two ends of the third capacitance element are respectively and electrically connected with the first access end and the first extraction end; the third capacitive element and the resistive heating device which are arranged in parallel can block the magnetic field generated by the resistive heating device.
In the connector area C, the third capacitor element 40 and the resistive heating device are connected in parallel, so that the third capacitor element 40 and the resistive heating device can form an equivalent RC filter circuit with the capacitor and the heating wire of the heating pad, and a part of electromagnetic field is filtered by filtering, thereby reducing the exposure value of the electromagnetic field.
Preferably, a protection resistor is further included in series with the third capacitive element 40, and the protection resistor may be one resistor unit, or at least two resistor units connected in parallel, or at least two resistor units connected in series with each other. The design of the protection resistor can enhance the protection of the third capacitive element 40, preferably the resistance of the protection resistor is 6-10 times, preferably 8 times, the equivalent resistance of the flexible resistive heating means.
Specifically, the third capacitance elements are each a capacitance unit; or, at least two capacitance units connected in parallel with each other; or, at least two capacitor units connected in series with each other.
Specifically, the capacitance unit is a ceramic capacitor, a polyester capacitor, a tantalum capacitor, a glass capacitor or an electrolytic capacitor.
Preferably, in any of the above embodiments, the capacitance value of the capacitor unit is equal to or greater than 0.1 μf and equal to or less than 47 μf.
Another embodiment also provides a seat heating mat employing the electromagnetic field restraint assembly described above.
A seat heating mat comprising an electromagnetic field restraint assembly for a flexible resistive heating device as described in any one of the embodiments above.
Another embodiment also provides a specific structure of a steering wheel heating pad applying the electromagnetic field restraint assembly.
A steering wheel heating pad comprising an electromagnetic field restraint assembly for a flexible resistive heating apparatus as in any one of the embodiments described above.
The effects of the above embodiments will be further described below with reference to experimental values of examples and comparative examples in actual use:
comparative example 1:
the heating pad without the electromagnetic field restraint assembly has the same specification and dimensions as those of embodiments 1-6 and the same injection current.
Specific electromagnetic exposure measurement test methods are described in the international standard ICNIRP.
Based on the above numerical analysis, the measured electromagnetic exposure values after application of embodiments 1-6 were all significantly lower than the exposure value limit of the electromagnetic field of the international standard ICNIRP.
The above description is only illustrative of the preferred embodiments of the present application and of the principles of the technology employed. It will be appreciated by persons skilled in the art that the scope of the application referred to in the present application is not limited to the specific combinations of the technical features described above, but also covers other technical features formed by any combination of the technical features described above or their equivalents without departing from the inventive concept. Such as the above-mentioned features and the technical features disclosed in the present application (but not limited to) having similar functions are replaced with each other.
Claims (20)
1. An electromagnetic field containment assembly for a flexible resistive heating apparatus, the flexible resistive heating apparatus comprising: the flexible pad body (10) and adhere to resistive wire (11) that the distributing of flexible pad body was arranged, resistive wire (11) possess current input and output, its characterized in that includes: a first access terminal (21) and a first extraction terminal (22) electrically connected to the input terminal (14) and the output terminal (15), respectively, and located in the junction area; and a first capacitive element (20) that spans between the first access terminal (21) and the first extraction terminal (22); the electrodes at the two ends of the first capacitive element (20) are respectively electrically connected with the first access end (21) and the first extraction end (22), and the first capacitive element (20) and the resistive heating device which are arranged in parallel can block an electromagnetic field generated by the resistive heating device;
The electromagnetic field restraint assembly for the flexible resistive heating device is used for an automobile seat heating pad or an automobile steering wheel heating pad.
2. An electromagnetic field restraint assembly for a flexible resistive heating apparatus as defined in claim 1 wherein: further comprises: a second inlet (31) and a second outlet (32) electrically connected to the input and output, respectively, and located on the area of the wire harness assembly; and a second capacitive element (30) disposed across the beam assembly between the second access terminal and the second exit terminal.
3. An electromagnetic field restraint assembly for a flexible resistive heating apparatus as defined in claim 2 wherein: further comprises: a third access terminal (41) and a third exit terminal (42) electrically connected to the input terminal and the output terminal, respectively, and located in the connector region; and a third capacitive element (40) disposed across the beam assembly between the third access terminal and the third exit terminal.
4. An electromagnetic field restraint assembly for a flexible resistive heating apparatus as defined in claim 3 wherein: the first capacitance element (20) or the second capacitance element (30) or the third capacitance element (40) is a capacitance unit respectively; or, at least two capacitance units connected in parallel with each other; or, at least two capacitor units connected in series with each other.
5. An electromagnetic field restraint assembly for a flexible resistive heating apparatus as defined in claim 3 wherein: the circuit further comprises a protection resistor (80) connected in series with the first capacitor element (20), the second capacitor element (30) or the third capacitor element (40), wherein the protection resistor is a resistor unit, or at least two parallel resistor units, or at least two resistor units connected in series.
6. An electromagnetic field restraint assembly for a flexible resistive heating apparatus as defined in claim 1 wherein: further comprises: a fourth capacitive element (60) spanning between the first access terminal (21) and the middle of the resistive wire (11), and/or a fifth capacitive element (70) spanning between the first extraction terminal (22) and the middle of the resistive wire.
7. An electromagnetic field restraint assembly for a flexible resistive heating apparatus as defined in claim 4 wherein: the capacitance unit is a ceramic capacitor, a polyester capacitor, a tantalum capacitor, a glass capacitor or an electrolytic capacitor.
8. An electromagnetic field restraint assembly for a flexible resistive heating apparatus as defined in claim 7 wherein: the capacitance value of the capacitance unit is more than or equal to 0.1 mu F and less than or equal to 47 mu F.
9. An electromagnetic field containment assembly for a flexible resistive heating apparatus, the flexible resistive heating apparatus comprising: the flexible pad body (10) and adhere to resistive wire (11) that the distributing of flexible pad body was arranged, resistive wire (11) possess current input and output, its characterized in that still includes: a second inlet (31) and a second outlet (32) electrically connected to the input (14) and the output (15), respectively, and located on the area of the harness assembly; and a second capacitive element (30) disposed across the beam assembly between a second access terminal (31) and a second extraction terminal (32); the electrodes at the two ends of the second capacitance element (30) are respectively and electrically connected with the second access end (31) and the second extraction end (32); the second capacitive element (30) and the resistive heating device are arranged in parallel, so that a magnetic field generated by the resistive heating device can be blocked;
The electromagnetic field restraint assembly for the flexible resistive heating device is used for an automobile seat heating pad or an automobile steering wheel heating pad.
10. An electromagnetic field restraint assembly for a flexible resistive heating apparatus as defined in claim 9 wherein: further comprises: a third access terminal (41) and a third exit terminal (42) electrically connected to the input terminal and the output terminal, respectively, and located in the connector region; and a third capacitive element (40) that spans between the third access terminal (41) and the third exit terminal (42) in the connector.
11. An electromagnetic field restraint assembly for a flexible resistive heating apparatus as defined in claim 10 wherein: the second capacitive element (30) or the third capacitive element (40) is a capacitive unit; or, at least two capacitance units connected in parallel with each other; or, at least two capacitor units connected in series with each other.
12. An electromagnetic field restraint assembly for a flexible resistive heating apparatus as defined in claim 10 wherein: the circuit further comprises a protection resistor (80) connected in series with the second capacitor element (30) or the third capacitor element (40), wherein the protection resistor is a resistor unit, or at least two resistor units connected in parallel with each other, or at least two resistor units connected in series with each other.
13. An electromagnetic field restraint assembly for a flexible resistive heating apparatus as defined in claim 11 wherein: the capacitance unit is a ceramic capacitor, a polyester capacitor, a tantalum capacitor, a glass capacitor or an electrolytic capacitor.
14. An electromagnetic field restraint assembly for a flexible resistive heating apparatus as defined in claim 13 wherein: the capacitance value of the capacitance unit is more than or equal to 0.1 mu F and less than or equal to 47 mu F.
15. An electromagnetic field containment assembly for a flexible resistive heating apparatus, the flexible resistive heating apparatus comprising: the flexible pad body (10) and adhere to resistive wire (11) that the distributing of flexible pad body was arranged, resistive wire (11) possess current input and output, its characterized in that still includes: a third access terminal (41) and a third exit terminal (42) electrically connected to the input terminal (14) and the output terminal (15), respectively, and located in the connector region; and a third capacitive element (40) provided across the connector between the third access terminal (41) and the third extraction terminal (42); the electrodes at both ends of the third capacitor element are electrically connected to the third access terminal (41) and the third extraction terminal (42), respectively; the third capacitor element (40) and the resistive heating device which are arranged in parallel can block the magnetic field generated by the resistive heating device;
The electromagnetic field restraint assembly for the flexible resistive heating device is used for an automobile seat heating pad or an automobile steering wheel heating pad.
16. An electromagnetic field restraint assembly for a flexible resistive heating apparatus as defined in claim 15 wherein: the third capacitive element (40) is a capacitive element; or, at least two capacitance units connected in parallel with each other; or, at least two capacitor units connected in series with each other.
17. An electromagnetic field restraint assembly for a flexible resistive heating apparatus as defined in claim 15 wherein: the third capacitive element (40) is a protection resistor (80) connected in series, the protection resistor being a resistor unit, or at least two resistor units connected in parallel with each other, or at least two resistor units connected in series with each other.
18. An electromagnetic field restraint assembly for a flexible resistive heating apparatus as defined in claim 16 wherein: the capacitance unit is a ceramic capacitor, a polyester capacitor, a tantalum capacitor, a glass capacitor or an electrolytic capacitor.
19. An electromagnetic field restraint assembly for a flexible resistive heating apparatus as defined in claim 18 wherein: the capacitance value of the capacitance unit is more than or equal to 0.1 mu F and less than or equal to 47 mu F.
20. An automobile seat heating pad, characterized in that: an electromagnetic field restraint assembly for a flexible resistive heating apparatus comprising any one of claims 1-19.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110774103.3A CN113597029B (en) | 2021-07-08 | 2021-07-08 | Electromagnetic field restraint for flexible resistive heating device and heating pad using same |
| DE212022000246.6U DE212022000246U1 (en) | 2021-07-08 | 2022-06-28 | Electromagnetic field limiting component for a flexible resistance heating device and heating pad with the same |
| PCT/CN2022/101875 WO2023280016A1 (en) | 2021-07-08 | 2022-06-28 | Electromagnetic field restraint member for flexible resistive heating apparatus, and heating pad using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110774103.3A CN113597029B (en) | 2021-07-08 | 2021-07-08 | Electromagnetic field restraint for flexible resistive heating device and heating pad using same |
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| Publication Number | Publication Date |
|---|---|
| CN113597029A CN113597029A (en) | 2021-11-02 |
| CN113597029B true CN113597029B (en) | 2024-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110774103.3A Active CN113597029B (en) | 2021-07-08 | 2021-07-08 | Electromagnetic field restraint for flexible resistive heating device and heating pad using same |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN113597029B (en) |
| DE (1) | DE212022000246U1 (en) |
| WO (1) | WO2023280016A1 (en) |
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| CN113597029B (en) * | 2021-07-08 | 2024-05-14 | 廊坊市金色时光科技发展有限公司 | Electromagnetic field restraint for flexible resistive heating device and heating pad using same |
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Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113597029B (en) * | 2021-07-08 | 2024-05-14 | 廊坊市金色时光科技发展有限公司 | Electromagnetic field restraint for flexible resistive heating device and heating pad using same |
-
2021
- 2021-07-08 CN CN202110774103.3A patent/CN113597029B/en active Active
-
2022
- 2022-06-28 DE DE212022000246.6U patent/DE212022000246U1/en active Active
- 2022-06-28 WO PCT/CN2022/101875 patent/WO2023280016A1/en unknown
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| US5912811A (en) * | 1997-10-16 | 1999-06-15 | Mackta; Leo | Device for reducing low frequency electromagnetic fields in an electric blanket and method |
| CN203193915U (en) * | 2013-02-20 | 2013-09-11 | 廊坊市金色时光科技发展有限公司 | Automobile seat and foil-type conductive heating membrane thereof |
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|---|---|
| CN113597029A (en) | 2021-11-02 |
| WO2023280016A1 (en) | 2023-01-12 |
| DE212022000246U1 (en) | 2024-04-30 |
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Address after: Building 1-5, Chunhui Modern Industrial Park, No. 207 Huaxin Road, Langfang Economic and Technological Development Zone, Hebei Province Patentee after: Anwen Technology Group Co.,Ltd. Country or region after: China Address before: Building 4-4, Northwest M, Nancheng Wangdian Community, Dongxinyuan Road, Heping Road, Guangyang District, Langfang City, Hebei Province Patentee before: LANGFANG GOLDEN TIME TECHNOLOGY DEVELOPMENT Co.,Ltd. Country or region before: China |