Manufacturing equipment and method of PTC heating core body

Abstract

The invention relates to the technical field of heater manufacturing, and particularly provides manufacturing equipment and method of a PTC heating core. The equipment comprises a fastener and an electrifying device, the fastener is used for fastening a fastening object in at least one direction through a fastening mechanism, the fastening object comprises a PTC heating core body which is glued and not heated and solidified, and the PTC heating core body comprises an electrode plate, a PTC heating element in glued connection with the electrode plate and an insulating substrate; the electrifying device comprises a plurality of electrode clamps, each electrode clamp comprises a chuck and a lead, the lead is connected with a power supply, and the chucks are used for being fixedly mounted on the electrode plates and guiding current of the leads into the electrode plates, so that the electrode plates are heated to solidify the glue. The invention aims to solve the problems of low manufacturing efficiency, dependence on high-temperature equipment, waste of energy and manpower and high manufacturing cost due to the fact that a PTC heater in the prior art needs to be fastened and baked for many times during manufacturing.

Description

Technical Field

[0001] The invention relates to the technical field of heater manufacturing, and in particular to a manufacturing device and method for a PTC heating core. Background Art

[0002] PTC (Positive Temperature Coefficient Thermistor) heater products have been widely used in the field of home appliances for air heating due to their special positive temperature coefficient resistance characteristics, such as air conditioning auxiliary heating, heaters, bathroom heaters, etc.; defrosting and heating of traditional fuel vehicles; heating in new energy vehicles, etc.

[0003] The PTC heater is mainly composed of a PTC heating core and a heat dissipation aluminum tube. The PTC heating core is mainly composed of an electrode sheet, a PTC heating element glued to the electrode sheet, and an insulating substrate. In the related art, due to the different materials and different setting positions of the PTC heating element and the insulating substrate, it is necessary to apply glue and dry twice to achieve the gluing and fixing of the PTC heating element and the insulating substrate respectively. In addition, drying requires a higher temperature, and generally the clamping mechanism as a whole needs to be placed in a high-temperature oven for baking and curing.

[0004] This method has many steps, low manufacturing efficiency, and requires reliance on high-temperature ovens or furnaces, which not only wastes resources but also has high costs. In addition, the baking operation using a high-temperature oven also requires reliance on manpower, which also leads to high labor costs.

[0005] Currently, no effective solution has been proposed for the problem that the manufacturing of PTC heaters in the related art requires multiple tightening and baking, has low manufacturing efficiency, relies on high-temperature equipment, wastes energy and manpower, and has high manufacturing costs. Summary of the invention

[0006] The present invention provides a manufacturing device and method for a PTC heating core, which at least solves the problem in the related art that the manufacturing of PTC heaters requires multiple tightening and baking, has low manufacturing efficiency, relies on high-temperature equipment, wastes energy and manpower, and has high manufacturing costs.

[0007] According to one aspect of an embodiment of the present invention, there is provided a manufacturing device for a PTC heating core, comprising: a fastener 1, and a power-on device 2; the fastener 1 is used to fasten a fastening object in at least one direction through a fastening mechanism, wherein the fastening object is a PTC heating core 11 that has been glued but not heated and solidified, and the PTC heating core 11 comprises an electrode sheet 12, a PTC heating element 13 glued to the electrode sheet 12, and an insulating substrate 14; the power-on device 2 comprises a plurality of electrode clips 21, the electrode clips 21 comprise a clamp 22 and a lead 23, the lead 23 is connected to a power source, the clamp 22 is used to be fixedly mounted on the electrode sheet 12, and the current of the lead 23 is introduced into the electrode sheet 12, so that the electrode sheet 12 is heated to solidify the glue.

[0008] As an optional solution, the number of the PTC heating cores 11 is multiple; the fastening object also includes: non-stick spacers 3 arranged on both sides of the heating core 11; the non-stick spacers 3 are metal spacers coated with a non-stick layer; and an insulating block 4 is also arranged between the metal spacer and the heating core 11.

[0009] As an optional solution, the fastening mechanism includes a power part and an edge-straightening mechanism, the power part is used to provide a fastening force in a corresponding direction and is transmission-connected to the edge-straightening mechanism, and the edge-straightening mechanism is used to match the contact surface of the fastening object by adjustment; the power part is a plurality of cylinders 5, and the output shafts of the plurality of cylinders 5 are fixed on the same panel 61, and the panel 61 is fixed to the edge-straightening mechanism through a connecting rod 62.

[0010] As an optional solution, the edge straightening mechanism includes a fixed edge 71, a movable edge 72 and a movable rod 73, the movable edge 72 is fixed on the movable rod 73, the movable rod 73 is slidably installed on the fixed edge 71, and the fixed edge 71 and the movable edge 72 are used to place the fastening object; the movable edge 72 includes a first edge 74 and a second edge 75; the first edge 74 and the second edge 75 are both fixed on the movable rod 73, and a plurality of bolts 76 are provided on the first edge 74 and the second edge 75, and the edge straightening is performed by extending and shortening the bolts 76 so as to straighten and tighten fastening objects with different contours.

[0011] As an optional solution, the cylinder 5 and the edge-straightening mechanism are arranged on the same working panel 8, and at least one end of the working panel 8 is provided with a tilting mechanism for adjusting the tilt angle of the working panel 8; the tilting mechanism is a supporting leg 9 hinged on the back of the working panel 8, wherein the back is a side of the working panel 8 on which the cylinder 5 and the edge-straightening mechanism are not arranged.

[0012] As an optional solution, the clamp 22 of the electrode clamp 21 includes a clamp body 24 and a conductive clamp 25; the clamp body 24 is used to connect the lead 23, and the conductive clamp 25 is an elastic clamp made of conductive material, including a plurality of inwardly curved clamp bodies, and the inner concave parts of the plurality of curved clamp bodies are in contact with the same contact surface.

[0013] According to another aspect of an embodiment of the present invention, a method for manufacturing a PTC heating core is provided, which is applied to the manufacturing equipment of the PTC heating core, and the method comprises: brushing glue on the electrode sheet 12, and arranging it on the fastener 1 with the PTC heating element 13, wherein the PTC heating element 13 contacts one side of the electrode sheet 12, and the fastener 1 is used to apply pressure in at least one direction to fasten the fastening object in at least one direction; brushing glue on the insulating substrate 14, and contacting it with the other side of the electrode sheet 12, and forming a PTC heating core 11 with the PTC heating element 13; fastening the contact surface of the PTC heating core 11 where glue is set by the fastener 1, wherein the contact surface includes the contact surface between the electrode sheet 12 and the PTC heating element 13, and the contact surface between the electrode sheet 12 and the insulating substrate 14; energizing the electrode sheet 12 of the fastened PTC heating core 11, and completing the manufacturing of the PTC heating core 11 after the glue solidifies.

[0014] As an optional solution, the fastener 1 fastens multiple PTC heating cores 11 at a time; before fastening the contact surface of the PTC heating core 11 where glue is set by the fastener 1, the method also includes: performing whole head processing on the multiple PTC heating cores 11 to align the contact surfaces of the multiple PTC heating cores 11; separating adjacent PTC heating cores 11 with non-stick spacers 3; when the non-stick spacers 3 are metal spacers coated with a non-stick layer, the PTC heating core 11 and the non-stick spacers 3 are separated by an insulating block 4.

[0015] As an optional solution, before energizing the electrode sheet 12 of the fastened PTC heating core 11, the method also includes: determining whether the metal spacer is conductive by measuring whether the resistance of the positive and negative electrodes reaches a preset resistance value; when the resistance reaches the preset resistance value, determining that the metal spacer is non-conductive; when the resistance does not reach the preset resistance value, determining that the metal spacer is conductive, and replacing other metal spacers coated with a non-stick layer.

[0016] As an optional solution, the electrode sheet 12 of the fastened PTC heating core 11 is energized, including: connecting the corresponding electrode to the corresponding electrode sheet 12 through the electrode clamp 21, wherein the PTC heating core 11 includes a main electrode sheet 121 and two branch electrode sheets 122, the electrodes connected to the main electrode sheets 121 of adjacent PTC heating cores 11 are opposite, and the electrodes connected to the branch electrode sheets 122 of the same PTC heating core 11 are opposite to the electrodes connected to the main electrode sheets 121; energizing the main electrode sheets 121 and the branch electrode sheets 122 at a preset voltage and for a preset time.

[0017] The manufacturing equipment of the PTC heating core provided by the embodiment of the invention coats the PTC heating element, the electrode sheet and the insulating substrate with glue and then installs them on the fastener at one time. After fastening, the electrode sheet is directly heated by an energized device to solidify the glue. It does not need to be dried in a high-temperature oven, and can also be formed in one time without multiple drying steps, thereby improving the production efficiency and production speed of the PTC heating core, reducing dependence on manpower, and reducing costs, and solving the problems in the related art that the manufacturing of PTC heaters requires multiple fastening and baking, has low manufacturing efficiency, relies on high-temperature equipment, wastes energy and manpower, and has high manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0019] Figure 1 It is a schematic diagram of a manufacturing device for a PTC heating core according to an embodiment of the present invention.

[0020] Figure 2 It is a schematic diagram of an edge straightening mechanism and a fastening object according to an embodiment of the present invention.

[0021] Figure 3 It is a schematic diagram of an electrode sheet and a PTC heating element according to an embodiment of the present invention.

[0022] Figure 4 It is a schematic diagram of the wiring structure of an embodiment of the present invention.

[0023] Figure 5 yes Figure 4 A magnified image of area A.

[0024] Figure 6 The present invention is a flowchart of a method for manufacturing a PTC heating core according to an embodiment of the present invention.

[0025] The above drawings include the following reference numerals:

[0026] 1—fastener; 11—PTC heating core; 12—electrode sheet; 121—main electrode sheet; 122—shunt electrode sheet; 13—PTC heating element; 131—PTC heating block; 132—ceramic insulating block; 14—insulating substrate; 2—power-on device; 21—electrode clamp; 22—clamp head; 23—lead wire; 24—clamp body; 25—conductive clamp; 3—non-stick spacer; 4—insulating block; 5—cylinder; 61—panel; 62—connecting rod; 71—fixed edge; 72—movable edge; 73—movable rod; 74—first edge; 75—second edge; 76—bolt; 8—working panel; 9—support leg. DETAILED DESCRIPTION

[0027] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0029] Unless otherwise specifically stated, the relative arrangement of the components and steps, numerical expressions and numerical values ​​described in these embodiments do not limit the scope of the present application. At the same time, it should be understood that for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and devices known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the techniques, methods and devices should be considered as part of the authorized specification.

[0030] In all examples shown and discussed herein, any specific value should be interpreted as being merely exemplary and not limiting. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0031] In the related technology, PTC heater uses PTC ceramic as the core heating element. Compared with traditional heating wires, heating tubes, and far-infrared quartz heaters, it has the advantages of automatic temperature control, a wide voltage range, no open flame, safety, reliability, and long life.

[0032] Car heaters are mainly used to provide a warm driving environment for vehicles in cold weather. They can also assist in engine preheating and reduce cold start wear and emissions. Its working principle is to apply high voltage to the high-voltage connection harness. After the product is powered on, the PTC heating element generates heat, which is then transferred to the air through the metal electrode, insulation layer, aluminum tube, and heat-conducting aluminum parts, and then the hot air is transported into the car through the fan.

[0033] In the related art, since the PTC heating element and the insulating substrate are made of different materials and are placed in different positions, it is necessary to apply glue and dry them twice to respectively achieve the gluing and fixing of the PTC heating element and the insulating substrate. Multiple tightening and baking are required, the manufacturing efficiency is low, and it relies on high-temperature equipment, which wastes energy and manpower and has high manufacturing costs.

[0034] See also Figures 1 to 5 The present application provides a manufacturing device for a PTC heating core, comprising: a fastener 1 and a power-on device 2; the fastener 1 can be used to fasten the glue-assembled PTC heating core, and the power-on device 2 can be used to energize the electrode sheets of the glue-assembled PTC heating core to make them heat up, thereby solidifying the glue and completing the manufacturing of the PTC heating core.

[0035] The PTC heating element, electrode sheet and insulating substrate are coated with glue and installed on the fastener at one time. After fastening, the electrode sheet is directly heated by an energized device to solidify the glue. There is no need to dry it in a high-temperature oven. One-time molding can be achieved without multiple drying steps, thereby improving the production efficiency and speed of the PTC heating core, reducing dependence on manpower, and reducing costs.

[0036] like Figure 1 and Figure 2 As shown, the fastener 1 is used to fasten a fastening object in at least one direction through a fastening mechanism, wherein the fastening object is a PTC heating core 11 that has been glued but not heated and solidified, and the PTC heating core 11 includes an electrode sheet 12, a PTC heating element 13 glued to the electrode sheet 12, and an insulating substrate 14.

[0037] Since the overall shape of the common PTC heating core 11 is a long flat strip with a relatively long length and a relatively small thickness, during splicing and fastening, a force perpendicular to the direction of the electrode sheet 12 is applied as much as possible. Therefore, the fastener 1 can provide a force in only one direction.

[0038] like Figure 1As shown, the fastener 1 can fasten multiple PTC heating cores 11 at a time, and adjacent PTC heating cores 11 are separated by non-stick spacers 3, which prevents the glue from flowing out and solidifying with other PTC heating cores 11 after the adjacent PTC heating cores 11 are pressed and fastened. The direction of the fastening force provided is parallel to the working panel 8 and perpendicular to the electrode sheet 12 of the PTC heating core 11.

[0039] Fastening a plurality of PTC heating cores 11 simultaneously can achieve more efficient production efficiency and greatly shorten the manufacturing time of a single PTC heating core 11 .

[0040] As an optional embodiment, there are multiple PTC heating cores 11; the fastening objects also include: non-stick spacers 3 arranged on both sides of the heating core 11; the non-stick spacers 3 are metal spacers coated with a non-stick layer; and an insulating block 4 is also arranged between the metal spacer and the heating core 11.

[0041] The non-stick spacer 3 can be a spacer made of a non-stick material or a spacer coated with a non-stick layer. The main body of the non-stick spacer 3 needs to meet certain hardness requirements to avoid the inability to effectively transmit the tightening force between the multiple PTC heating cores 11 when tightened by force.

[0042] Since the cost of non-stick materials is high and the non-stick spacers 3 are mainly non-stick on the surface, when fastening multiple PTC heating cores 11, glue flows onto the non-stick spacers 3, and then after electric coagulation, it is convenient to clean the glue. In order to reduce costs, non-stick layer-coated spacers are preferred.

[0043] In order to ensure the hardness and realize the non-stick surface, the present embodiment uses a metal block coated with a non-stick layer. Preferably, a Teflon-coated aluminum block is selected.

[0044] Considering that the non-stick layer may fall off with use, the metal spacer will conduct electricity when power is turned on, which will cause multiple PTC heating cores 11 to short-circuit, thereby causing circuit failure, ineffective heating, and even damage to the power supply device 2.

[0045] To this end, in this embodiment, when the non-stick spacer 3 is a metal spacer coated with a non-stick layer, an insulating block 4 is further provided between the metal spacer and the heating core 11. The insulating block 4 can be a spacer made of an insulating material with a certain thickness, for example, a stone bar, ceramic, etc.

[0046] It should be noted that, as a part of the spacer, the insulating block 4 also has certain hardness requirements so as to be able to effectively transmit the fastening force.

[0047] like Figure 2As shown, the PTC heating core 11 may include an electrode sheet 12, a PTC heating element 13, and an insulating substrate 14. The electrode sheet 12 sandwiches the PTC heating element 13, and the insulating substrate 14 is disposed outside the electrode sheet 12. The electrode sheet 12 and the PTC heating element 13 are glued and fixed, and the electrode sheet 12 and the insulating substrate 14 are also glued and fixed.

[0048] In this embodiment, after a plurality of PTC heating cores 11 are glued and assembled, they are separated and fastened by non-stick spacers 3. Then, the electrode sheets 12 of the PTC heating cores 11 are connected by the power supply device 2, and power is supplied to heat the PTC heating cores 11 so that the glue solidifies, and the manufacturing of the PTC heating cores 11 is completed.

[0049] like Figure 1 , Figure 3 and Figure 4 As shown, the power supply device 2 includes a power source and a plurality of electrode clamps 21. The electrode clamp 21 includes a clamp 22 and a lead 23. The lead 23 is connected to the power source. The clamp 22 is used to be fixedly mounted on the electrode sheet 12 to introduce the current of the lead 23 into the electrode sheet 12 so that the electrode sheet 12 heats up and the glue solidifies.

[0050] Thereby, the electrode sheet 12 , the PTC heating element 13 , and the insulating substrate 14 are fixed together according to the assembled and fastened structure, thereby manufacturing the PTC heating core 11 .

[0051] As an optional embodiment, Figure 1 As shown, the fastener 1 includes a working panel 8 and a fastening mechanism disposed on the working panel 8. The fastening mechanism includes a power member and an edge trimming mechanism. The power member is used to provide a fastening force in a corresponding direction and is in transmission connection with the edge trimming mechanism. The edge trimming mechanism is used to match the contact surface of the fastening object by adjustment. Thus, the fastening object to be fastened is fastened by driving the edge trimming mechanism through the power member.

[0052] The power part may be a component that provides mechanical energy, and may be a cylinder, a hydraulic press, an electric motor, or other component that can convert other energy forms into mechanical energy.

[0053] The trimming mechanism can be adjusted to match the contact surface of the fastening object, provide a large force-bearing surface, and thus provide a more stable and uniform fastening force. The trimming mechanism is connected to the power member in a transmission manner and can be driven by the power member to apply a fastening force to the fastening object.

[0054] The power parts are a plurality of cylinders 5 , the output shafts of the plurality of cylinders 5 are fixed on the same panel 61 , and the panel 61 is fixed on the edge straightening mechanism through a connecting rod 62 .

[0055] exist Figure 1In the figure, there are two cylinders 5, which can be more than one in theory. The cylinder body of the cylinder 5 is fixed to the working panel 8 through a fixing member, and the output shaft is fixed to the panel 61. The power of the cylinder 5 is output to the trimming mechanism through the connecting rod 62 fixedly connected to the panel 61 to fasten the fastening object.

[0056] As an optional embodiment, the edge straightening mechanism includes a fixed edge 71, a movable edge 72 and a movable rod 73, the movable edge 72 is fixed on the movable rod 73, the movable rod 73 is slidably installed on the fixed edge 71, and the space between the fixed edge 71 and the movable edge 72 is used to place the fastening object.

[0057] like Figure 1 As shown, when the cylinder 5 applies pressure, the pressure of the output shaft is transmitted to the movable edge 72 through the panel 61 and the connecting rod 62. The connecting rod 62 is fixedly connected to the first edge 74 and the second edge 75 of the movable edge 72, thereby effectively transmitting and avoiding the problem of poor structural strength and easy deformation of single-point fixing, which affects pressure transmission.

[0058] The fixed edge 71 is fixed on the working panel 8 , and when the movable edge 72 is pressed, the fastening force is transmitted to the fastening object disposed between the movable edge 72 and the fixed edge 71 , thereby fastening the fastening object.

[0059] While tightening, the working panel 8 can also provide support for the tightened object, effectively preventing the multiple PTC heating cores 11 from easily deviating perpendicular to the tightening force direction when being tightened and compressed, thereby causing the tightening failure.

[0060] The movable edge 72 includes a first edge 74 and a second edge 75; the first edge 74 and the second edge 75 are both fixed on the movable rod 73, and a plurality of bolts 76 are provided on the first edge 74 and the second edge 75. The bolts 76 are extended and shortened to adjust the edge so as to adjust and tighten the fastening objects with different contours.

[0061] The first side 74 and the second side 75 of the movable side 72 also make it easier to install and adjust the bolt 76 .

[0062] As an optional embodiment, the cylinder 5 and the edge-straightening mechanism are arranged on the same working panel 8, and at least one end of the working panel 8 is provided with a tilting mechanism for adjusting the tilt angle of the working panel 8; the tilting mechanism is a supporting leg 9 hinged on the back of the working panel 8, wherein the back is a side of the working panel 8 where the cylinder 5 and the edge-straightening mechanism are not arranged.

[0063] The working panel 8 can provide support and a working surface for the entire fastening mechanism and the fastening object, which can make the structure simpler and the transmission of the fastening force more direct and effective.

[0064] Considering that the fastening object includes multiple PTC heating cores 11, the amount of glue applied is large, and when tightening the fastening force, the unsolidified glue will also flow out under pressure. In order to avoid the problem that most of the glue flows onto the working panel 8, causing difficulty in cleaning and disassembly, a non-stick layer can be provided on the working panel 8 in the area in contact with the fastening object.

[0065] The area of ​​the working panel 8 is relatively large, the cost of designing the non-stick layer is relatively high, and frequent maintenance is required. In order to save costs, it is also considered that the non-stick spacer 3 has a non-stick layer.

[0066] In this embodiment, the working panel 8 is arranged in an inclined structure, so that when fastening a plurality of PTC heating cores 11, the glue is allowed to flow onto the non-stick spacer 3 as much as possible, thereby solving the technical problem of difficulty in disassembly caused by the flow of glue.

[0067] Specifically, a support leg 9 can be provided on the back of the working panel 8, and the back is a side of the working panel 8 where the cylinder 5 and the trimming mechanism are not provided, so that the inclination angle of the working panel 8 can be adjusted according to the needs during use.

[0068] As an optional embodiment, the clamp 22 of the electrode clamp 21 includes a clamp body 24 and a conductive clamp 25; the clamp body 24 is used to connect the lead 23, and the conductive clamp 25 is an elastic clamp made of conductive material, including multiple inwardly curved clamp bodies, and the inner concave parts of the multiple curved clamp bodies are in contact with the same contact surface.

[0069] like Figure 4 and Figure 5 As shown, the electrode clamp 21 mainly includes a clamp head 22 and a lead wire 23. The clamp head 22 includes a clamp body 24 and a conductive clamp 25. The clamp body 24 is connected to the lead wire 23 and transmits the current of the lead wire 23 to the conductive clamp 25.

[0070] The conductive clip 25 is an elastic clip made of conductive material, and can be clamped and fixed on the electrode sheet 12 by elastic force, thereby achieving conductive connection with the electrode sheet 12 and effectively transmitting the current of the lead 23 to the electrode sheet 12.

[0071] The conductive clip 25 includes a plurality of curved surface clip bodies that are bent inwardly, and the inner concave parts of the plurality of curved surface clip bodies are in contact with the same contact surface, so that the elastic force can act on the contact surface, and the contact surface can be a plane, which is used to fit with the planar electrode sheet 12, so that the elastic force of the conductive clip 25 effectively acts on the electrode sheet 12 to form a fixed conductive connection between the conductive clip 25 and the electrode sheet 12.

[0072] like Figure 3As shown, the PTC heating core 11 of this embodiment includes a main electrode sheet 121 and two shunt electrode sheets 122. The connecting pins of the main electrode sheet 121 and the connecting pins of the shunt electrode sheet 122 are at the same end and are separated by only a ceramic insulating block 132.

[0073] If multiple PTC heating cores 11 are arranged according to Figure 1 and Figure 2 In this case, the main electrode sheets 121 of the plurality of PTC heating cores 11 are connected with the same polarity when connected. In this case, the thickness of the ceramic insulating block 132 is small, and when the current is too large or the glue flows, the main electrode sheet 121 may short-circuit with the adjacent shunt electrode sheet 122, or the metal spacer may short-circuit.

[0074] In order to avoid this situation, the connection structures of adjacent PTC heating chips 11 are set oppositely, that is, the electrodes connected to the main electrode sheets 121 of adjacent PTC heating cores 11 are opposite, and the electrodes connected to the shunt electrode sheets 122 of the same PTC heating core 11 are opposite to the electrodes connected to the main electrode sheets 121; the main electrode sheets 121 and the shunt electrode sheets 122 are energized at a preset voltage and for a preset time.

[0075] In this way, the polarities on both sides of the metal spacer are the same, which is equivalent to connecting the main electrode sheets 121 of multiple PTC heating cores 11 in series with the branch electrode sheets 122 of adjacent PTC heating cores 11. When a short circuit occurs, the current can be isolated to a certain extent through the PTC heating element 13, effectively avoiding the short circuit and causing the malfunction of the powered device.

[0076] Figure 6 Flow chart of a method for manufacturing a PTC heating core according to an embodiment of the present invention, Figure 6 As shown, according to another aspect of the embodiment of the present invention, a method for manufacturing a PTC heating core is provided, which is applied to a manufacturing device for a PTC heating core, and the method comprises:

[0077] Step S601, after brushing glue on the electrode sheet 12, arrange it and the PTC heating element 13 on the fastener 1, wherein the PTC heating element 13 contacts one side of the electrode sheet 12, and the fastener 1 is used to apply pressure in at least one direction to fasten the fastening object in at least one direction;

[0078] Step S602, after applying glue to the insulating substrate 14, the insulating substrate 14 is in contact with the other side of the electrode sheet 12, and forms a PTC heating core 11 with the PTC heating element 13;

[0079] Step S603, fastening the contact surface of the PTC heating core 11 where glue is provided by the fastener 1, wherein the contact surface includes the contact surface between the electrode sheet 12 and the PTC heating element 13, and the contact surface between the electrode sheet 12 and the insulating substrate 14;

[0080] Step S604 , energizing the electrode sheet 12 of the fastened PTC heating core 11 , and completing the manufacture of the PTC heating core 11 after the glue solidifies.

[0081] The manufacturing method of the above-mentioned PTC heating core provided in this embodiment is to coat the PTC heating element, the electrode sheet and the insulating substrate with glue and then install them on the fastener at one time. After fastening, the electrode sheet is directly heated by an energized device to solidify the glue, and it does not need to be dried in a high-temperature oven. It can also achieve one-time molding and does not require multiple drying steps, thereby improving the production efficiency and production speed of the PTC heating core, reducing the dependence on manpower, and reducing costs.

[0082] Since the PTC heating elements 13 are numerous and small in size, it is inconvenient to apply glue to them. Therefore, after applying glue to the electrode sheets 12 , they are arranged on the fastener 1 together with the PTC heating elements 13 .

[0083] After the electrode sheet 12 and the PTC heating element 13 are assembled with glue, they have not solidified yet. At this time, it is difficult to apply glue to the electrode sheet 12, and it is easy to cause the assembled PTC heating element 13 to shift. Therefore, the insulating substrate 14 needs to be coated with glue for further assembly.

[0084] That is, after the insulating substrate 14 is coated with glue, specifically, coated on one side, it contacts the other side of the electrode sheet 12 and forms the PTC heating core 11 with the PTC heating element 13. Thus, the coating and assembly of the PTC heating core 11 are effectively completed.

[0085] Then, the contact surface of the PTC heating core 11 where the glue is set is fastened by the fastener 1, wherein the contact surface includes the contact surface between the electrode sheet 12 and the PTC heating element 13, and the contact surface between the electrode sheet 12 and the insulating substrate 14. Then, the electrode sheet 12 of the fastened PTC heating core 11 is energized, and after the glue solidifies, the manufacturing of the PTC heating core 11 is completed.

[0086] As an optional embodiment, the fastener 1 fastens multiple PTC heating cores 11 at a time; before fastening the contact surface of the PTC heating core 11 where glue is set by the fastener 1, the method also includes: performing whole head processing on the multiple PTC heating cores 11 to align the contact surfaces of the multiple PTC heating cores 11; separating adjacent PTC heating cores 11 with non-stick spacers 3; when the non-stick spacers 3 are metal spacers coated with a non-stick layer, separating the PTC heating core 11 and the non-stick spacers 3 with insulating blocks 4.

[0087] like Figure 1 As shown, the fastener 1 can fasten a plurality of PTC heating cores 11 at one time, thereby improving the manufacturing efficiency of the PTC heating cores 11 .

[0088] Thus, in the above step S603 , when tightening the PTC heating cores 11 , it is now necessary to perform an overall treatment on the multiple PTC heating cores 11 , that is, to align their positions, so that the tightening force can be effectively transmitted between the multiple PTC heating cores 11 .

[0089] Considering that glue is easy to overflow during fastening and short circuit is easy to occur when power is turned on, non-stick spacers 3 are used to separate adjacent PTC heating cores 11. On the one hand, short circuit can be avoided, and on the other hand, the PTC heating core 11 can be easily disassembled after the glue is removed.

[0090] When the non-stick spacer 3 is a metal spacer coated with a non-stick layer, the PTC heating core 11 and the non-stick spacer 3 are separated by an insulating block 4 .

[0091] As an optional embodiment, before energizing the electrode sheet 12 of the fastened PTC heating core 11, the method also includes: determining whether the metal spacer is conductive by measuring whether the resistance of the positive and negative electrodes reaches a preset resistance value; when the resistance reaches the preset resistance value, determining that the metal spacer is non-conductive; when the resistance does not reach the preset resistance value, determining that the metal spacer is conductive, and replacing other metal spacers coated with a non-stick layer.

[0092] Considering that the non-stick spacer 3 is a metal spacer, the non-conductive non-stick coating is easy to fall off, and thus it is easy to conduct electricity. After the multiple PTC heating cores 11 are fastened and before the power is officially turned on, the resistance of the positive and negative electrodes can be tested. By resistance detection, it can be determined whether a short circuit occurs.

[0093] Specifically, when the resistance reaches a preset resistance value, it is determined that the metal spacer is non-conductive; when the resistance does not reach the preset resistance value, it is determined that the metal spacer is conductive, and other metal spacers plated with a non-stick layer are replaced.

[0094] It should be noted that before the resistance test, the electrode clip 21 needs to be connected to the electrode sheet 12 of the corresponding PTC heating core 11. After the circuit is connected, the resistance measurement can be performed.

[0095] As an optional embodiment, energizing the electrode sheet 12 of the fastened PTC heating core 11 includes: connecting the corresponding electrode to the corresponding electrode sheet 12 through the electrode clamp 21 .

[0096] Among them, the PTC heating core 11 includes a main electrode sheet 121 and two branch electrode sheets 122. The electrodes connected to the main electrode sheets 121 of adjacent PTC heating cores 11 are opposite, and the electrodes connected to the branch electrode sheets 122 of the same PTC heating core 11 are opposite to the electrodes connected to the main electrode sheets 121; the main electrode sheets 121 and the branch electrode sheets 122 are energized at a preset voltage and for a preset time.

[0097] When power is turned on, the corresponding electrode clip 21 is connected to the electrode sheet 12 of the corresponding PTC heating core 11 in the above manner, thereby avoiding the problem of short circuit to a certain extent.

[0098] It should be noted that this embodiment also provides an optional implementation, which is described in detail below. Figure 3 As shown, it includes a main electrode sheet 121 and two shunt electrode sheets 122. The main electrode sheet 121 and the shunt electrode sheet 122 sandwich the PTC heating element. The PTC heating element includes a PTC heating block 131 and a ceramic insulating block 132.

[0099] Multiple PTC heating blocks 131 are arranged together. Figure 3 Eight PTC heating blocks 131 are arranged in the middle. Ceramic insulating blocks 132 are arranged at both ends of the PTC heating block 131, and a ceramic insulating block 132 is also arranged in the middle.

[0100] In the related art, in the production Figure 3 When the PTC heating core 11 is shown, it is necessary to apply glue twice to tighten it. The first time, the main electrode sheet 121 and the branch electrode sheet 122 are glued, and the PTC heating element including the PTC heating block 131 and the ceramic insulating block 132 are fastened according to the Figure 3 Arrange them together in a way, fasten them, and put them into a high-temperature tunnel furnace or high-temperature oven to dry the glue.

[0101] Specifically, the first fastening is firstly performed through the fastening mechanism of the fastener, that is, the extension size of the head of the electrode sheet 12 is unified, and then a rectangular metal block with the same width is placed on both sides of the main electrode sheet 121 and the branch electrode sheet 122 as a lining iron. Then, through the C-type clamp, pressure is applied to the heating core and the lining iron to form a whole, and then enter the high-temperature tunnel furnace or high-temperature oven. After baking, the electrode sheet 12 and the PTC heating element 13 will form a whole, and it is named a heating strip at this time.

[0102] The second fastening process is mainly to glue the insulating substrate 14 to the above-mentioned heating strip and fasten it according to the Figure 1 , Figure 2 and Figure 4 The heating strips are arranged together in a manner to be fastened and placed in a high temperature tunnel furnace or a high temperature oven to dry the glue. At this time, the heating strips and the insulating substrate 14 form a whole, which is called a heating core.

[0103] During the entire process of primary and secondary tightening, the high-temperature tunnel furnace or high-temperature oven will occupy a larger workshop area, affecting the overall layout of the workshop. The high-temperature tunnel furnace or high-temperature oven generates a large amount of heat, which will increase the temperature of the workshop, especially in summer, making employees feel uncomfortable, consuming a lot of electricity and labor, and increasing manufacturing costs.

[0104] Moreover, it is not easy to obtain uniform pressure of the C-clip during one tightening, which may cause the PTC heating element 13 to break. Continuous arcing may occur in subsequent manufacturing. In the arcing state, the electrode will experience abnormally high temperature plating, which may cause the product to catch fire and ultimately affect the safety of the car owner.

[0105] To this end, this embodiment combines the primary and secondary fastening processes into one process. Specifically, after the electrode sheet 12 is brushed with glue, the PTC heating element 13 is arranged, and then the insulating substrate 14 is brushed with glue on one side. After brushing with glue and preliminary placement, the fastening mechanism of the fastener 1 is placed.

[0106] Then, the adjacent heating cores are separated by Teflon-coated aluminum blocks, and synthetic stone strips are used to separate the Teflon-coated aluminum blocks. The heating cores are positioned by the fastening mechanism. Then, fasteners 1 are used to apply pressure and fix them. In order to prevent the glue on the heating cores from sticking to each other and making it difficult to separate the heating cores, aluminum blocks with Teflon-coated materials are used to separate them, and then the resistance frame is closed to fix and press the heating cores.

[0107] The specific working principle is to use the self-heating characteristics of the heating strip, energize the electrode sheet 12 to make the PTC heating element 13 generate heat, and the heat will solidify the glue, and finally make the components form a whole.

[0108] The improved structure can energize the electrodes through the power clip, but the Teflon aluminum coating is very thin and may fall off with use, causing the aluminum block to conduct electricity. In order to prevent short circuits during the heating process of the electric heating core, the function of testing resistance is added to it, so as to prevent short circuits in the product and cause ablation.

[0109] That is, before actually energizing, the resistance between the positive and negative leads is detected to detect whether a short circuit occurs. If there is no short circuit, the resistance is relatively large.

[0110] Since the primary and secondary fastening processes are combined into one process, the labor input is reduced, the use of equipment such as high-temperature tunnel furnaces or high-temperature ovens is eliminated, and the production time and production cost of the product are reduced.

[0111] For ease of description, spatially relative terms, such as "on", "above", "on the upper surface of", "upper", etc., may be used here to describe the spatial position relationship between a device or feature and other devices or features as shown in the figures.

[0112] It should be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, a device described as "above other devices or structures" or "above other devices or structures" would then be positioned "below the other devices or structures" or "beneath the other devices or structures."

[0113] Thus, the exemplary term "above" can encompass both an orientation of "above" and "below." The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0114] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0115] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A manufacturing device for a PTC heating core, characterized in that: include: Fastener (1), energizing device (2); The fastener (1) is used to fasten a fastening object in at least one direction through a fastening mechanism, wherein the fastening object comprises a PTC heating core (11) that has been glued but not heated and solidified, and the PTC heating core (11) comprises an electrode sheet (12), a PTC heating element (13) glued to the electrode sheet (12), and an insulating substrate (14); The energizing device (2) comprises a plurality of electrode clips (21), wherein the electrode clips (21) comprise a clamp (22) and a lead wire (23), wherein the lead wire (23) is connected to a power source, and the clamp (22) is used to be fixedly mounted on the electrode sheet (12) to conduct the current of the lead wire (23) into the electrode sheet (12), so that the electrode sheet (12) generates heat and the glue solidifies.

2. The manufacturing equipment of the PTC heating core according to claim 1, characterized in that: The number of the PTC heating cores (11) is multiple; The fastening object further comprises: non-stick spacers (3) arranged on both sides of the heating core (11); the non-stick spacers (3) are metal spacers coated with a non-stick layer; An insulating block (4) is also provided between the metal spacer and the heating core (11).

3. The manufacturing equipment of the PTC heating core according to claim 2, characterized in that: The fastening mechanism includes a power piece and an edge-straightening mechanism, wherein the power piece is used to provide a fastening force in a corresponding direction and is in transmission connection with the edge-straightening mechanism, and the edge-straightening mechanism is used to match the contact surface of the fastening object by adjustment; The power member is a plurality of cylinders (5), the output shafts of the plurality of cylinders (5) are fixed on the same panel (61), and the panel (61) is fixed on the edge straightening mechanism via a connecting rod (62).

4. The manufacturing equipment of the PTC heating core according to claim 3, characterized in that: The edge straightening mechanism comprises a fixed edge (71), a movable edge (72) and a movable rod (73); the movable edge (72) is fixed on the movable rod (73); the movable rod (73) is slidably mounted on the fixed edge (71); a fastening object is placed between the fixed edge (71) and the movable edge (72); The movable edge (72) comprises a first edge (74) and a second edge (75); the first edge (74) and the second edge (75) are both fixed to the movable rod (73); a plurality of bolts (76) are provided on the first edge (74) and the second edge (75); the bolts (76) are extended and shortened to adjust the edge so as to adjust and tighten fastening objects with different contours.

5. The manufacturing equipment of the PTC heating core according to claim 3, characterized in that: The cylinder (5) and the edge straightening mechanism are arranged on the same working panel (8), and at least one end of the working panel (8) is provided with a tilting mechanism for adjusting the tilting angle of the working panel (8); The tilting mechanism is a support leg (9) hingedly connected to the back side of the working panel (8), wherein the back side is a side of the working panel (8) on which the cylinder (5) and the edge straightening mechanism are not provided.

6. The manufacturing equipment of the PTC heating core according to any one of claims 1 to 5, characterized in that: The clamp head (22) of the electrode clamp (21) comprises a clamp body (24) and a conductive clamp (25); The clamp body (24) is used to connect the lead wire (23); the conductive clamp (25) is an elastic clamp made of conductive material and comprises a plurality of inwardly curved clamp bodies, wherein the inner concave portions of the plurality of curved clamp bodies are in contact with the same contact surface.

7. A method for manufacturing a PTC heating core, characterized in that: Applicable to the manufacturing equipment of the PTC heating core according to any one of claims 1 to 6, the method comprising: After the electrode sheet (12) is coated with glue, it is arranged on the fastener (1) together with the PTC heating element (13), wherein the PTC heating element (13) is in contact with a side surface of the electrode sheet (12), and wherein the fastener (1) is used to apply pressure in at least one direction to fasten the fastening object in at least one direction; After applying glue to the insulating substrate (14), the insulating substrate (14) is in contact with the other side of the electrode sheet (12) and forms a PTC heating core (11) with the PTC heating element (13); The contact surface of the PTC heating core (11) provided with glue is fastened by the fastener (1), wherein the contact surface comprises a contact surface between the electrode sheet (12) and the PTC heating element (13), and a contact surface between the electrode sheet (12) and the insulating substrate (14); The electrode sheet (12) of the fastened PTC heating core (11) is energized, and after the glue solidifies, the manufacture of the PTC heating core (11) is completed.

8. The method for manufacturing a PTC heating core according to claim 7, characterized in that: The fastener (1) fastens a plurality of PTC heating cores (11) at a time; before fastening the contact surface of the PTC heating core (11) on which glue is provided by the fastener (1), the method further comprises: Performing head-over processing on the plurality of PTC heating cores (11) so that contact surfaces of the plurality of PTC heating cores (11) are aligned; Separating adjacent PTC heating cores (11) with non-stick spacers (3); When the non-stick spacer (3) is a metal spacer coated with a non-stick layer, the PTC heating core (11) and the non-stick spacer (3) are separated by an insulating block (4).

9. The method for manufacturing a PTC heating core according to claim 8, characterized in that: Before energizing the electrode sheet (12) of the fastened PTC heating core (11), the method further comprises: Determining whether the metal spacer is conductive by measuring whether the resistance of the positive and negative electrodes reaches a preset resistance value; When the resistance reaches a preset resistance value, determining that the metal spacer is non-conductive; When the resistance does not reach the preset resistance value, it is determined that the metal spacer is conductive, and other metal spacers plated with the non-stick layer are replaced.

10. The method for manufacturing a PTC heating core according to claim 7, characterized in that: The electrode sheet (12) of the fastened PTC heating core (11) is energized, comprising: The corresponding electrodes are connected to the corresponding electrode sheets (12) via an electrode clamp (21), wherein the PTC heating core (11) comprises a main electrode sheet (121) and two branch electrode sheets (122), the electrodes connected to the main electrode sheets (121) of adjacent PTC heating cores (11) are opposite, and the electrodes connected to the branch electrode sheets (122) of the same PTC heating core (11) are opposite to the electrodes connected to the main electrode sheets (121); The main electrode sheet (121) and the branch electrode sheet (122) are energized at a preset voltage and for a preset time.

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