CN110418445B - PTC heating single tube, PTC heating core and PTC heater - Google Patents
PTC heating single tube, PTC heating core and PTC heater Download PDFInfo
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- CN110418445B CN110418445B CN201910789755.7A CN201910789755A CN110418445B CN 110418445 B CN110418445 B CN 110418445B CN 201910789755 A CN201910789755 A CN 201910789755A CN 110418445 B CN110418445 B CN 110418445B
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 152
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 67
- 239000000741 silica gel Substances 0.000 claims abstract description 67
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 67
- 238000009413 insulation Methods 0.000 claims abstract description 8
- 239000003292 glue Substances 0.000 claims description 13
- 229920001296 polysiloxane Polymers 0.000 claims description 9
- 238000010276 construction Methods 0.000 claims 1
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 7
- 230000017525 heat dissipation Effects 0.000 abstract description 6
- 229910052782 aluminium Inorganic materials 0.000 description 19
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 19
- 238000001746 injection moulding Methods 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000003825 pressing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/02—Details
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/02—Details
- H05B3/03—Electrodes
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/02—Details
- H05B3/04—Waterproof or air-tight seals for heaters
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/40—Heating elements having the shape of rods or tubes
- H05B3/42—Heating elements having the shape of rods or tubes non-flexible
- H05B3/44—Heating elements having the shape of rods or tubes non-flexible heating conductor arranged within rods or tubes of insulating material
Landscapes
- Resistance Heating (AREA)
- Thermistors And Varistors (AREA)
Abstract
The invention provides a PTC heating single tube, a PTC heating core body and a PTC heater, which solve the technical problems of scrapping, heat dissipation performance reduction, tightness and the like of the traditional PTC heating single tube in the manufacturing and using processes, wherein the PTC heating single tube is provided with a shell and a PTC heating core, the PTC heating core is provided with a PTC thermistor sheet, an electrode sheet and an insulating false sheet, and the shell is a silica gel shell; the silica gel shell is wrapped and connected on the outer surface of the PTC heating core, and the silica gel shell is of an integrated structure; the PTC thermistor pieces are arranged at intervals by a plurality of PTC heating pieces, and the insulation dummy pieces are arranged in the intervals; the electrode plates are provided with long electrode plates and a plurality of short electrode plates which are arranged at intervals, each PTC heating plate is connected with the long electrode plates, and each PTC heating plate is connected with each short electrode plate in a one-to-one correspondence manner; one end of each electrode sheet inserting sheet is connected with each electrode sheet, and the other end of each electrode sheet inserting sheet penetrates through the silica gel shell and stretches out.
Description
Technical Field
The invention relates to the technical field of heating, in particular to a PTC heating single tube, a PTC heating core body and a PTC heater.
Background
Under the condition that the waste heat of an engine is lacking, electronic heating products are required to provide corresponding heat for heating, defrosting and demisting safety requirements in the automobile in winter, the service life of a power battery is short at low temperature, and the like, so that the PTC heater is an excellent choice as an important part of an automobile air conditioner heating system. Especially, the new energy automobile is most suitable.
The most important component of the PTC heater is a PTC heating single tube, and the preparation process is generally approximately as follows: the upper electrode plate and the lower electrode plate are respectively coated and attached on the positive electrode and the negative electrode of the PTC thermistor through silica gel, the upper electrode plate and the lower electrode plate are wrapped by an insulating film to complete the assembly of the PTC heating core, then the PTC heating core is inserted into an aluminum pipe to be pressed, so that the insulating film, the electrode plate and the PTC thermistor are tightly pressed, reliable electric conduction and heat conduction performance is realized, and then the two ports of the aluminum pipe are sealed and coated with sealant to ensure air tightness and waterproof performance. Three problems are easy to occur in the manufacturing and using processes:
(1) In the pressing operation process of the aluminum pipe provided with the PTC heating core, if the stamping die has a slight uneven degree, on one hand, the electrode plate is easy to damage and break on the stamping line, so that the PTC heating core and the aluminum pipe are scrapped; on the other hand, if the stamping is not in place, a gap is formed between the PTC heating core and the inner wall of the aluminum tube, and the gap is used as an air barrier, so that the heat conducting performance of the PTC heating core to the outside can be reduced.
(2) The insulating film in the PTC heating single tube has poor thermal conductivity, resulting in a great influence on the overall heating efficiency.
(3) Automotive parts are subjected to severe conditions and the parts are subjected to high frequency vibrations. In the running process of the automobile, the PTC heating single tube vibrates at high frequency, so that the sealing glue sealed and coated at two ends of the aluminum tube is easy to loosen, the sealing effect is poor, the automobile is especially used in a humid environment, the air tightness and the waterproof performance of the automobile are seriously reduced, and the service life of the automobile is shortened.
Disclosure of Invention
The invention aims to solve the defects of the technology and provide a PTC heating single tube, a PTC heating core body and a PTC heater which have simple structure and reliable functions.
The invention provides a PTC heating single tube, which is provided with a shell and a PTC heating core arranged in the shell, wherein the PTC heating core is provided with a PTC thermistor sheet and an electrode sheet, the electrode sheet is connected with an electrode sheet inserting sheet, the shell is a silica gel shell, and the PTC heating core is also provided with an insulating false sheet; the silica gel shell is wrapped and connected on the outer surface of the PTC heating core, and the silica gel shell is of an integrated structure; the PTC thermistor sheet is formed by arranging a plurality of PTC heating sheets at intervals, and the insulation dummy sheet is arranged in the interval between two adjacent PTC heating sheets; the electrode plates are provided with long electrode plates and a plurality of short electrode plates which are mutually isolated and arranged at intervals, one side surface of each PTC heating plate is connected with the long electrode plates, and the other side surface of each PTC heating plate is connected with each short electrode plate in a one-to-one correspondence manner; the number of the electrode slice inserting pieces is multiple, one end of each electrode slice inserting piece is connected with each electrode slice, and the other end of each electrode slice inserting piece penetrates through the silica gel shell and stretches out.
Preferably, the long electrode plate is provided with a first groove which is matched with the PTC thermistor plate, and the upper surface of each PTC heating plate is connected in the first groove of the long electrode plate; each short electrode plate is provided with a second groove which is matched with the corresponding PTC heating plate, and the lower surface of each PTC heating plate is connected in the second groove of the corresponding short electrode plate.
Preferably, the electrode slice inserting sheet is provided with an electrode slice connecting part and an external circuit connecting part, and the electrode slice connecting part and the external circuit connecting part are connected to form an L-shaped structure; the electrode plate connecting part is connected with the electrode plate, and the external circuit connecting part penetrates through the silica gel shell and stretches out.
Preferably, grooves and clamping blocks are respectively arranged on two side surfaces of the silica gel shell, which are positioned outside the joint of the electrode slice and the electrode slice inserting piece, and the grooves and the clamping blocks are adapted; when two adjacent PTC heating single tubes are arranged in parallel, the corresponding adaptation of the clamping block of one PTC heating single tube is inserted into the groove of the adjacent PTC heating single tube.
Preferably, the insulating dummy sheets are respectively connected with the adjacent PTC heating sheets.
Preferably, the silica gel shell is of an injection molding integrated structure.
Preferably, a plurality of first glue inlets are formed along the edge of the long electrode plate at intervals, and a plurality of second glue inlets are formed along the edge of the short electrode plate at intervals.
A PTC heating core body is provided with the PTC heating single tube and a radiating fin connected with the outer side face of a silica gel shell of the PTC heating single tube.
A PTC heater is provided with the PTC heating single tube.
The beneficial effects of the invention are as follows: the invention provides a PTC heating single tube, a PTC heating core body and a PTC heater, on one hand, the structure is simple, a silica gel shell is used for replacing an aluminum tube in the prior art, and the aluminum tube with the PTC heating core in the prior art is not required to be pressed; the surface of PTC heating core is wrapped up by the silica gel shell completely, and silica gel adsorption performance is high, can firmly adsorb the surface at PTC heating core, has solved the PTC heating core that current PTC heater leads to because of the aluminum pipe suppression and aluminum pipe and scrapps or reduce heat dispersion's technical problem. On the other hand, the surface of long electrode slice and short electrode slice is tightly laminated with the silica gel shell, does not have prior art's insulating film separation, and the silica gel shell is made by silica gel, makes whole heating efficiency obtain very big improvement. Thirdly, the silica gel shell is of an integrated structure, only the other end of the electrode sheet inserting sheet penetrates through the silica gel shell and extends out, sealing glue sealing in the prior art is omitted, the air tightness and the waterproof grade of the PTC single tube are obviously improved, and through inspection, the waterproof performance of the PTC heating core can meet the protection grade requirements of IP67 and even over IP 68; silica gel belongs to rubber material, possesses high elasticity, can cushion vibrations under the environment of high frequency vibration to the PTC heating core of protection parcel in the silica gel shell is not damaged.
Drawings
Fig. 1 is a schematic view of the structure of a PTC heating single tube of the present invention;
FIG. 2 is a schematic view of the left side view of FIG. 1;
FIG. 3 is a schematic structural view (only with a silicone housing in section) of an enlarged view of the partial cross-section shown in FIG. 2;
FIG. 4 is an enlarged schematic view of the cross-sectional view A-A shown in FIG. 1;
FIG. 5 is a schematic view of the structure of the silica gel shell of FIG. 4 with the silica gel shell removed;
fig. 6 is a schematic structural view of the perspective view shown in fig. 1;
fig. 7 is a schematic view of the PTC heating core of fig. 1;
FIG. 8 is a schematic view of the structure of the left side view shown in FIG. 7;
FIG. 9 is a schematic structural view of the exploded view shown in FIG. 7;
FIG. 10 is a schematic view of the structure of the long electrode shown in FIG. 9;
fig. 11 is a schematic structural view of the left view shown in fig. 10;
FIG. 12 is a schematic view of the structure of the short electrode shown in FIG. 9;
fig. 13 is a schematic view of the structure of the left view shown in fig. 12;
FIG. 14 is a schematic view of the structure of the electrode tab insert shown in FIG. 9;
fig. 15 is a schematic view of the structure of the left view shown in fig. 14;
fig. 16 is a schematic structural view of a PTC heating core;
FIG. 17 is a schematic view of the structure of the PTC heating cores shown in FIG. 16 in a side-by-side plug-in arrangement;
fig. 18 is a schematic diagram of the circuit diagram of the present invention.
The marks in the figure: the PTC thermistor comprises a PTC thermistor sheet, an electrode sheet inserting sheet, a silica gel shell, an insulating dummy sheet, a PTC heating sheet, a long electrode sheet, a short electrode sheet, a first groove, a second groove, an electrode sheet connecting portion, an external circuit connecting portion, a groove, a clamping block, a first glue inlet, a second glue inlet, a heat radiating sheet, a PTC heating core and an S switch.
Detailed Description
The invention will be further described with reference to the drawings and specific examples to aid in understanding the context of the invention. The method used in the invention is a conventional method unless specified otherwise; the raw materials and devices used, unless otherwise specified, are all conventional commercial products.
Example 1:
as shown in fig. 1 to 9, the present invention provides a PTC heating single tube, which is provided with a housing and a PTC heating core 17 disposed in the housing, wherein the PTC heating core 17 is provided with a PTC thermistor sheet 1 and an electrode sheet, and the electrode sheet is connected with an electrode sheet insertion sheet 2; the PTC thermistor sheet 1 is a heating element that generates heat. The shell is a silica gel shell 3, and the PTC heating core 17 is also provided with an insulating false sheet 4; the outer surface of PTC heating core 17 is connected in the parcel of silica gel shell 3, and silica gel shell 3 is integrated into one piece structure. The PTC thermistor sheet 1 is formed by arranging a plurality of PTC heating sheets 5 at intervals, and an insulating dummy sheet 4 is arranged in the interval between two adjacent PTC heating sheets 5; the insulation dummy plate 4 mainly has two functions, on one hand, the two adjacent PTC heating plates 5 are completely insulated, and the two PTC heating plates are prevented from breakdown or communication. On the other hand, the long electrode sheet 6 is prevented from bending at the above-mentioned intervals during the production and installation processes, and the stiffness of the long electrode sheet 6 is increased. The electrode plates are provided with a long electrode plate 6 and a plurality of short electrode plates 7 which are mutually isolated and arranged at intervals, and the number of the short electrode plates 7 is usually two, or more than two according to actual requirements; one side surface of each PTC heating sheet 5 is connected with the long electrode sheet 6, and the other side surface of each PTC heating sheet 5 is connected with each short electrode sheet 7 in a one-to-one correspondence. The whole structure of the PTC heating core 17 realizes the partition control of the circuit in the PTC heating core 17, on one hand, when one short electrode sheet 7 fails due to the problems of fragmentation and the like, the use of the parallel circuit where other short electrode sheets 7 in the PTC heating core 17 are positioned is not affected; on the other hand, when the heating value needs to be increased or decreased, the on-off control can be performed on the switch S of the sub-circuit connected with the short electrode sheet 7, so that the PTC heating sheet 5 connected with the corresponding short electrode sheet 7 in the PTC heating core 17 is controlled to be electrified to generate heat or not to generate power, and flexible adjustment of the PTC heating core 17 to increase or decrease the external heating value is realized. The number of the electrode slice inserting pieces 2 is multiple, one end of each electrode slice inserting piece 2 is connected with each electrode slice, and the other end of each electrode slice inserting piece 2 penetrates through the silica gel shell 3 and stretches out. The electrode sheet inserting sheet 2 is connected with an external circuit, wherein the long electrode sheet 6 is communicated with the positive electrode, and the two short electrode sheets 7 are respectively communicated with the negative electrode, so that the zonal control of the circuit in the PTC heating core 17 is realized; when the long electrode sheet 6 and the short electrode sheet 7 in the PTC heating core 17 are energized, the PTC thermistor sheet 1 heats and transfers heat to the silicone housing 3, and then the silicone housing 3 transfers heat to the outside.
The invention provides a PTC heating single tube, on one hand, the structure is simple, the silica gel shell 3 replaces the aluminum tube in the prior art, and the pressing operation of the aluminum tube with the PTC heating core in the prior art is not needed; the surface of the PTC heating core 17 is completely wrapped by the silica gel shell 3, and the silica gel adsorption property is firmly adsorbed on the surface of the PTC heating core 17, so that the technical problems that the PTC heating core and the aluminum tube are scrapped or the heat dissipation property is reduced due to the aluminum tube pressing of the traditional PTC heater are solved; and the silica gel housing 3 is used as a rubber material, and has good insulation property compared with the aluminum pipe metal material in the prior art. On the other hand, the outer surfaces of the long electrode plate 6 and the short electrode plate 7 are tightly attached to the silica gel housing 3, the insulation film in the prior art does not block the long electrode plate and the short electrode plate, the silica gel housing 3 is made of silica gel, and the overall heating efficiency is greatly improved. Thirdly, the silica gel shell 3 is of an integrated structure, and only the other end of the electrode sheet inserting sheet 2 penetrates through the silica gel shell 3 and extends out, so that sealing glue sealing in the prior art is not needed, the air tightness and the waterproof grade of the PTC single tube are obviously improved, and through inspection, the waterproof performance of the PTC heating single tube can meet the protection grade requirements of IP67, IP68 and above; the silica gel belongs to rubber material, possesses high elasticity, can cushion vibrations under the environment of high frequency vibration to PTC heating core 17 of parcel in silica gel shell 3 is not damaged.
As a preference of the present embodiment, as shown in fig. 3 to 5, 10, 12, the long electrode sheet 6 is provided with a first groove 8 adapted to the PTC thermistor sheet 1, and the upper surface of each PTC heating sheet 5 is connected in the first groove 8 of the long electrode sheet 6; each short electrode sheet 7 is provided with a second groove 9 adapted to its corresponding PTC heating sheet 5, and the lower surface of each PTC heating sheet 5 is connected in the second groove 9 of its corresponding short electrode sheet 7. The first groove 8 and the second groove 9 play a role in positioning, so that the PTC thermistor piece 1 is convenient to install and fix, and the PTC thermistor piece 1 is prevented from sliding to fail in the installation and use process. From another point of view, the first grooves 8 and the second grooves 9 also function to position the long electrode sheet 6 and the short electrode sheet 7 with the PTC thermistor sheet 1. The electrode plate is made of aluminum, so that the manufacturing cost is low, and the heat conduction and electric conduction performance is good.
As a preferable example of the present embodiment, as shown in fig. 3, 7 to 9, 14 and 15, the electrode tab sheet 2 is provided with an electrode tab connection portion 10 and an external circuit connection portion 11, and the electrode tab connection portion 10 and the external circuit connection portion 11 are connected in an L-shaped structure; the electrode sheet connecting portion 10 is connected with the electrode sheet, one end portion of the external circuit connecting portion 11 is connected with the electrode sheet connecting portion 10, and the other end portion of the external circuit connecting portion 11 passes through the silicone housing 3 and protrudes for connection with an external circuit. The L-shaped structural design of the electrode slice inserting sheet 2 can increase the contact area of the electrode slice inserting sheet 2 and the electrode slice, so that the passing current is increased, and overheat burning caused by overlarge resistance is prevented. The electrode sheet insert 2 is usually made of copper, has good conductivity,
as the preference of the embodiment, in fig. 1-4, two side surfaces of the silica gel shell 3 positioned outside the joint of the electrode slice and the electrode slice inserting sheet 2 are respectively provided with a groove 12 and a clamping block 13, and the shape and the structure of the groove 12 and the clamping block 13 are adapted; when two adjacent PTC heating single tubes are arranged in parallel, the clamping block 13 of one PTC heating single tube is correspondingly matched and inserted into the groove 12 of the adjacent PTC heating single tube. As shown in fig. 16, the grooves 12 of the silica gel shells 3 of the two adjacent PTC heating single tubes are connected with the clamping blocks 13 in an adaptive manner, so that a plurality of PTC heating single tubes can be conveniently installed, and the working efficiency is improved.
As a preference of this embodiment, as shown in fig. 3, the insulating dummy sheet 4 is connected to the PTC heating sheets 5 adjacent thereto, respectively, so that each PTC heating sheet 5 of the PTC thermistor sheet 1 is more secure during installation and use, and is prevented from being displaced, so that each circuit controlled in the PTC heating core 17 is more stable during energization and use.
As a preferred embodiment, the silica gel housing 3 is an injection molding integrated structure, that is, the PTC heating single tube adopts the existing insert molding process, and the PTC heating core 17 of the present invention is used as a special material insert. In the manufacturing process, the PTC heating core 17 prepared in advance is filled into a mold matching the shape of the outer surface of the silicone housing 3, and then the silicone is injected, and the molten silicone is bonded to the PTC heating core 17 and solidified. The PTC heating core 17 is completely wrapped by the injection molding integrally formed silica gel shell 3, namely the inner wall of the silica gel shell 3 is tightly connected with the outer surface of the PTC heating core 17, no hot bad conductor air is blocked, and only the other end part of the external circuit connecting part 11 of the electrode sheet inserting sheet 2 of the silica gel shell 3 is exposed for being communicated with an external circuit; in the later stage, the external circuit connecting part 11 of the electrode slice inserting sheet 2 exposed out of the silica gel shell 3, which is connected with an external circuit, is only required to be sealed. The injection molding integrated structure of the silica gel shell 3 combines good heat conduction, insulation performance and plasticity of silica gel, so that the heating efficiency, insulation performance and production process of the PTC heating single tube are further improved; the whole single tube is approximately in a completely closed state, the waterproof performance is further enhanced, and the grade requirements of IP68 and above can be met; in addition, compared with the pipe pressing process in the prior art, the operation is simple, and the risk that the PTC heating single pipe is scrapped or the heat dissipation performance is reduced does not exist; the silica gel has stable chemical property, convenient production and processing and strong practicability. As a further preferable example of this embodiment, as shown in fig. 5, 10 and 12, a plurality of first adhesive inlets 14 are provided at intervals along the edge of the long electrode sheet 6, and a plurality of second adhesive inlets 15 are provided at intervals along the edge of the short electrode sheet 7. When the PTC heating core 17 is used as a special material insert to be put into a mould for injection molding, a part of molten silica gel flows into the first glue inlet 14 and the second glue inlet 15, after solidification, the silica gel in the first glue inlet 14 and the second glue inlet 15 has a connecting effect on the silica gel positioned on the outer side and the inner side of the long electrode sheet 6 and the short electrode sheet 7, on one hand, the connection among the long electrode sheet 6, the short electrode sheet 7 and the PTC thermistor sheet 1 is enhanced, and the circulation of a PTC heating core 17 circuit is ensured during use; on the other hand, the outer surfaces of the long electrode sheet 6 and the short electrode sheet 7 and the silica gel casing 3 connected with the long electrode sheet and the short electrode sheet are strengthened, delamination is prevented, and the tight connection state is kept. It should be noted that the injection molding integrated structure of the silica gel housing 3 is not only applicable to the PTC heating core 17 of the present invention, but also to the PTC heating core of the prior art.
Example 2:
as shown in fig. 16 and 17, the present invention provides a PTC heating core provided with a PTC heating single tube as described in embodiment 1, and a heat sink 16 connected to the outer side surface of the silicone housing 3 of the PTC heating single tube. The heat dissipation aluminum sheet is used for further improving the heat dissipation effect. When the PTC heating element is used, when the electrode plate is electrified, the PTC heating element 17 heats and transfers heat to the silica gel shell 3, and then the silica gel shell 3 transfers heat outwards through the heat dissipation aluminum sheet.
Example 3:
the present invention provides a PTC heater provided with a PTC heating single tube of the above embodiment 1 or embodiment 2. The PTC heater is mainly composed of the heat generating core described in embodiment 2 and the electrical connection support base, wherein the heat generating core is provided with a PTC heat generating single tube as described in embodiment 1, and the heat sink 16 connected to the outer side surface of the silica gel housing 3 of the PTC heat generating single tube. The heating core body is fixed with the electric connection supporting seat, and is usually fixed with the electric connection supporting seat in an inserting manner; the electric connection supporting seat is an existing device. The electrode plate of the PTC heater is electrically controlled and connected with an external power supply controller by a circuit after passing through the electric connection supporting seat. Under the control of a power supply controller, for example, when the electrode plates are electrified, the PTC heating core 17 heats and transfers heat to the silica gel shell 3, and the heat of the silica gel shell 3 is emitted outwards by the heat-radiating aluminum sheets. (schematic drawing)
It should be noted that, in the foregoing embodiments, the "first" and the "second" do not represent an absolute distinction between structures and/or functions, and do not represent a sequential execution order, but are merely for convenience of description.
In the description of the present invention, it should be understood that the terms "left", "right", "upper", "lower", "top", "bottom", "front", "rear", "inner", "outer", "back", "middle", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must be provided with specific orientations, be configured and operated in specific orientations, and thus are not to be construed as limiting the present invention.
However, the foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, so that the substitution of equivalent elements or equivalent variations and modifications within the scope of the invention are intended to fall within the scope of the claims.
Claims (7)
1. The PTC heating single tube is provided with a shell and a PTC heating core arranged in the shell, wherein the PTC heating core is provided with a PTC thermistor sheet and an electrode sheet, and the electrode sheet is connected with an electrode sheet inserting sheet; the silica gel shell is wrapped and connected to the outer surface of the PTC heating core, and the silica gel shell is of an integrated structure; the PTC thermistor sheet is formed by arranging a plurality of PTC heating sheets at intervals, and the insulation dummy sheet is arranged in the interval between two adjacent PTC heating sheets; the electrode plates are provided with long electrode plates and a plurality of short electrode plates which are mutually isolated and arranged at intervals, one side surface of each PTC heating plate is connected with the long electrode plates, and the other side surface of each PTC heating plate is connected with each short electrode plate in a one-to-one correspondence manner; the number of the electrode plate inserting pieces is multiple, one end of each electrode plate inserting piece is connected with each electrode plate, and the other end of each electrode plate inserting piece penetrates through the silica gel shell and extends out;
the long electrode plate is provided with a first groove matched with the PTC thermistor plate, and the upper surface of each PTC heating plate is connected in the first groove of the long electrode plate; each short electrode plate is provided with a second groove matched with the corresponding PTC heating plate, and the lower surface of each PTC heating plate is connected in the corresponding second groove of the short electrode plate;
the electrode slice inserting piece is provided with an electrode slice connecting part and an external circuit connecting part, and the electrode slice connecting part is connected with the external circuit connecting part to form an L-shaped structure; the electrode plate connecting part is connected with the electrode plate, and the external circuit connecting part penetrates through the silica gel shell and extends out.
2. A PTC heating single tube according to claim 1, wherein grooves and clamping blocks are respectively arranged on two side surfaces of the silica gel housing, which are positioned outside the connection part of the electrode sheet and the electrode sheet inserting sheet, and the grooves and the clamping blocks are adapted; when two adjacent PTC heating single tubes are arranged in parallel, the clamping block of one PTC heating single tube is correspondingly matched and inserted into the groove of the adjacent PTC heating single tube.
3. A PTC heating single tube according to claim 1, wherein the insulating dummy sheets are respectively connected to the PTC heating sheets adjacent thereto.
4. A PTC heating single tube according to any one of claims 1-3, wherein the silicone housing is of injection molded integral construction.
5. A PTC heating single tube according to claim 4, wherein a plurality of first glue inlets are provided at intervals along the edges of the long electrode sheets, and a plurality of second glue inlets are provided at intervals along the edges of the short electrode sheets.
6. A PTC heating core characterized in that it is provided with a PTC heating single tube according to any one of claims 1 to 5, and a heat sink connected to the outer side surface of the silica gel housing of the PTC heating single tube.
7. A PTC heater provided with a PTC heating single tube according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN203416434U (en) * | 2013-09-05 | 2014-01-29 | 孝感华工高理电子有限公司 | Insulated high-power automobile air-conditioning PTC heater |
| CN210381352U (en) * | 2019-08-26 | 2020-04-21 | 威海市科博乐汽车电子有限公司 | PTC heating single tube, PTC heating core and PTC heater |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203416434U (en) * | 2013-09-05 | 2014-01-29 | 孝感华工高理电子有限公司 | Insulated high-power automobile air-conditioning PTC heater |
| CN210381352U (en) * | 2019-08-26 | 2020-04-21 | 威海市科博乐汽车电子有限公司 | PTC heating single tube, PTC heating core and PTC heater |
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