CN109661044A - PTC heats and heating equipment - Google Patents

Abstract

The purpose of the present invention is to provide a kind of PTC heats, have length direction, width direction and thickness direction, comprising: multiple PTC chips are alongst arranged；First electrode sheet, positioned at the first side of multiple PTC chips in a thickness direction；And second electrode sheet, positioned at the second side of multiple PTC chips in a thickness direction；Wherein, region between two neighboring PTC chip in the longitudinal direction, first electrode sheet has the first arch portion towards second electrode sheet protrusion, and second electrode sheet has the second arch portion towards first electrode sheet protrusion, and the first arch portion and the second arch portion offset one from another in the direction of the width.The present invention also provides a kind of heating equipments including the PTC heats.The PTC heats can meet thermally conductive and insulation requirement simultaneously.

Description

PTC heats and heating equipment

Technical field

The present invention relates to a kind of PTC heats, and are related to a kind of heating equipment including the PTC heats.

Background technique

PTC (Positive Temperature Coefficient, that is, positive temperature coefficient) heats can be used as more The heat source of kind electric heating equipment, such as air-conditioning, heater, PTC heats are sent out using self-heating heating after PTC chip power-up Heat.At present there are many kinds of the implementations of high pressure PTC heats, one of which is the structure shape of outer cover aluminium alloy casing Formula, internal structure group become " insulating layer+electrode slice+PTC chip+electrode slice+insulating layer ".

For example, Chinese utility model patent CN203933981U discloses a kind of insulated type ptc heater, the insulated type Ptc heater includes powering on pole piece, lower electrode slice, the PTC ceramics of rectangular-shape, aluminum pipe and insulating paper.The top of PTC ceramics and PTC ceramics surface electrode is respectively set in lower part, and the upper surface electrode and lower end surface electrode of PTC ceramics 2 pass through silicone adhesive respectively Pole piece and lower electrode slice are powered on, the width for powering on pole piece is greater than width of the width less than or equal to PTC ceramics of PTC ceramics surface electrode Degree, the width that the width of lower electrode slice is greater than PTC ceramics surface electrode are less than or equal to the width of PTC ceramics.It is glued in PTC ceramics 2 When tying electrode slice and lower electrode slice, PTC ceramics wraps up insulating paper with the outside for powering on pole piece, lower electrode slice combines, and passes through Insulating paper 4 is arranged in aluminum pipe, and PTC ceramics surface electrode is not completely covered on the top or lower part of PTC ceramics, PTC ceramics table Face electrode is the middle part that the middle part and lower part on PTC ceramics top is arranged in, in PTC ceramics, the two sides of PTC ceramics surface electrode There are certain surpluses, i.e. the surplus of two sides is that electrode stays hem width degree respectively.

Two electrodes are the tabular being parallel to each other in the prior art, and insulating layer generallys use insulating paper or aluminium oxide Potsherd or the two use simultaneously.

Using insulating paper, in order to guarantee reliable insulation performance, it will usually wrap up more than one layer on electrode slice, usually 2.5 layers or more, influence heat-conducting effect；Using alumina ceramic plate, heat conduction efficiency is usually thinner, and effect is better, and thickness is because absolutely There are bottlenecks for edge requirement；And the two uses simultaneously, can not also realize the balance of insulating requirements and heat-conducting effect well.

Summary of the invention

The purpose of the present invention is to provide a kind of PTC heats.The PTC heats can meet simultaneously well to be led The requirement of heat and insulation.

The present invention provides a kind of PTC heats, has length direction, width direction and thickness direction, comprising: multiple PTC chip is arranged along the length direction；First electrode sheet, positioned at the multiple PTC chip on the thickness direction First side；And second electrode sheet, positioned at the second side of the multiple PTC chip on the thickness direction；Wherein, adjacent Region between two PTC chips in the length direction, the first electrode sheet have convex towards the second electrode sheet Rise the first arch portion, the second electrode sheet have towards the first electrode sheet protrusion the second arch portion, described first Arch portion and second arch portion offset one from another in the width direction.

In one embodiment, the PTC heats further includes multiple first insulating layers and multiple second insulating layers, Each PTC chip corresponds to first insulating layer in the multiple first insulating layer and one in the multiple second insulating layer A second insulating layer, one first insulating layer are located at the same side of the first electrode sheet simultaneously relative to the PTC chip And the first electrode sheet is between one first insulating layer and the PTC chip, one second insulating layer phase For the PTC chip be located at the second electrode sheet same side and the second electrode sheet between one second absolutely Between edge layer and the PTC chip.

In one embodiment, aluminum pipe is arranged with outside first insulating layer and the second insulating layer.

In one embodiment, the first electrode sheet and the second electrode sheet are respectively formed with the first notch and Two incisions, first notch and second notch respectively corresponded on the thickness direction evacuation second arch portion and First arch portion.

In one embodiment, the setting of first arch portion and second arch portion in the length direction Position is identical, and shape and size are identical.

In one embodiment, the PTC chip includes chip body and layer electrodes, and the chip body is described The layer electrodes are provided on two surfaces on thickness direction.

In one embodiment, the layer electrodes are in the thick area ratio on section perpendicular to the thickness direction The chip body is small in the thick area on section.

In one embodiment, each arch portion in first arch portion and second arch portion perpendicular to The width of the width direction is trapezoidal shape on section.

In one embodiment, each arch portion in first arch portion and second arch portion perpendicular to The width of the width direction is isosceles-trapezium-shaped on section.

In one embodiment, each arch portion in first arch portion and second arch portion is apart from outer layer The aluminum pipe between creepage distance be Giso1, the PTC chip with a thickness of Tptc, the insulation of single aluminum pipe fire-bar Performance requirement is Uiso (VAC), wherein Giso1 >=Uiso (VAC)/Tptc.

In one embodiment, the first electrode sheet and the second electrode sheet are respectively formed with the first notch and Two incisions, first notch and second notch respectively corresponded on the thickness direction evacuation second arch portion and First arch portion；The PTC chip includes chip body and layer electrodes, and the chip body is on the thickness direction Two surfaces on be provided with the layer electrodes, also, the layer electrodes are perpendicular to the thick to cutting of the thickness direction Chip body described in area ratio on face is small in the thick area on section；And first arch portion and described second Each arch portion in arch portion is being trapezoidal shape on section perpendicular to the wide of the width direction.

In one embodiment, the PTC chip with a thickness of Tptc, the first electrode sheet and the second electrode Each electrode slice in piece with a thickness of Tetrd, the mistake of first arch portion and second arch portion in the direction of the width Opening distance is Giso2, each arch portion in the side of the PTC chip and first arch portion and second arch portion Distance between the middle position for starting protrusion in the length direction is Ggap1, and first insulating layer and described second is absolutely The width spacing between the inward flange of the aluminum pipe of outer layer is Galtrd to each insulating layer in edge layer in the direction of the width, The width of each electrode slice in the first electrode sheet and the second electrode sheet is Wtrd, first notch and described the The notch depth of each notch in the direction of the width in two incisions is Gtrd2, the end edge of first notch and described second The end edge of vertical range and second notch between the opposite bevel edge of arch portion is opposite with first arch portion Bevel edge between vertical range be Ggap2, two end edges of first notch and each notch in second notch End edge distance in the length direction is Gtrd1, between the side of the layer electrodes and the side of the chip body Back gauge include length in the length direction to back gauge Wptctrd1 and in the direction of the width wide to back gauge The distance between interior top margin of Wptctrd2, the outer top margin of first arch portion and second arch portion is G2etrd, institute The trapezoidal angle for stating the first arch portion and each arch portion in second arch portion is θ etrd, wherein Tptc >=2mm； Tetrd≥0.7mm；1.2*Tptc >=Giso2 > Tptc；Ggap1≥Tptc；Galtrd≥1mm；Gtrd2=(Wtrd+ Giso2)/2；Ggap2≥Tptc；Gtrd1≥Tetrd*2.5；Wptctrd1=Wptctrd2 >=1mm；G2etrd≤0.5mm； And etrd >=90 ° θ.

The present invention provides a kind of PTC heats again, has length direction, width direction and thickness direction, and feature exists In, comprising: multiple PTC chips are arranged along the length direction；First electrode sheet is located at the multiple PTC chip described The first side on thickness direction；And second electrode sheet, positioned at the multiple PTC chip on the thickness direction second Side；Wherein, the region between two neighboring PTC chip in the length direction, the first electrode sheet and described second An electrode slice in electrode slice has the arch portion towards another electrode slice protrusion.

The present invention also provides a kind of heating equipments, including above-mentioned PTC heats.

The present invention by the design of modified electrode piece, by electrode slice by original strip tabular is revised as being staggered, band The shape for having protrusion to bend climbs electricity to increase so as to provide more the air gaps for electrode slice and external insulation Distance.Multiple PTC chips can be uniformly distributed, and improve heat exchange efficiency.In addition, by corresponding a pair of of the insulating layer of a piece of PTC chip, When insulating layer uses potsherd, it can reduce the size of potsherd, potsherd liquid under same process conditions can be effectively reduced Crush the probability split.PTC heats according to the present invention can greatly improve heat transfer under the premise of guaranteeing insulation performance Efficiency.

Detailed description of the invention

It is to provide further understanding of the invention including attached drawing, they are included and constitute part of this application, Accompanying drawing shows embodiment of the present invention, and plays the role of explaining the principle of the invention together with this specification.In attached drawing:

Fig. 1 is the front view of PTC heating equipment.

Fig. 2 is the top view of PTC heating equipment.

Fig. 3 is the side view of PTC heating equipment.

Fig. 4 is the sectional view along Fig. 3 taken along line A-A.

Fig. 5 is the amplification sectional view in region indicated by arrow B in Fig. 4.

Fig. 6 is the sectional view along line C-C interception and turned upside down in Fig. 5.

Fig. 7 is the sectional view along the line E-E interception in Fig. 5.

Specific embodiment

The invention will be further described with attached drawing With reference to embodiment, elaborates in the following description more More details are to facilitate a thorough understanding of the present invention, still the present invention obviously can be come with a variety of other ways different from this description Implement, those skilled in the art can without violating the connotation of the present invention according to practical situations make it is similar promote, It deduces, therefore should not be limited the scope of the invention with the content of this specific embodiment.

For example, the fisrt feature then recorded in the description above second feature or above formed, may include The embodiment that first and second features are formed by way of directly contacting also is included in shape between the first and second features At the embodiment of supplementary features, to can not directly be contacted between the first and second features.In addition, in these disclosures It may repeat reference numerals and/or letter in different examples.The repetition is in order to brief and clear, itself is not indicated Each embodiment and/or interstructural relationship being discussed.Further, when first element is with being connected with second element or tie What the mode of conjunction described, which includes the embodiment that the first and second elements are connected directly or are bonded to each other, and also includes adopting The first and second interelements ground connection is set to be connected or be bonded to each other with one or more other intervening elements additions.

As representative of the present invention, unless context clearly prompts exceptional situation, the words such as " one ", "an" and/or "the" are not Odd number is refered in particular to, may also comprise plural number.It is, in general, that term " includes " and "comprising" only prompt to include the steps that clearly to identify and Element, and these steps and element do not constitute one it is exclusive enumerate, the step of method or apparatus may also include other Or element.

For the convenience of description, herein may use such as " under ", " lower section ", " being lower than ", " following ", " top ", "upper" Etc. spatial relationship word the relationships of an elements or features shown in the drawings and other elements or feature described.It will reason Solve, these spatial relationship words be intended to encompass in use or device in operation, other than the direction described in attached drawing Other directions.For example, being described as be in other elements or feature " below " or " under " if overturning the device in attached drawing Or the direction of the element of " following " will be changed to " top " in the other elements or feature.Thus, illustrative word " under Side " and " following " can include upper and lower both direction.Device may also have other directions (to be rotated by 90 ° or in its other party To), therefore spatial relation description word used herein should be interpreted accordingly.In addition, it will also be understood that being referred to as when one layer at two layers " between " when, it can be only layer between described two layers, or there may also be one or more intervenient layers.

Attached drawing is to draw according to the principle of equal proportion according to the actual size ratio of product.It should be noted that not It can be carried out with the mapping mode under embodiment appropriately combined.

Referring to figure 1, figure 2 and figure 3, the front view, bottom view and left view of the example constructions of heating equipment 100 are respectively illustrated Figure.Left and right directions in Fig. 1 is defined as length direction D1, up and down direction is defined as thickness direction D2, perpendicular to the side of paper To width direction D3 is defined as, direction definition is described only for facilitating, is not limited orientation, hereafter will be by single PTC Size of the heats 1 on length direction D1 is known as the length of PTC heats 1, by PTC heats 1 in width direction Size on D3 is known as the width of PTC heats 1, and size of the PTC heats 1 on thickness direction D2 is known as PTC and is added The thickness of hot core 1.It may also be said that PTC heats 1 has length direction D1, width direction D3 and thickness direction D2.

Fig. 4 is the sectional view intercepted along the line A-A of Fig. 3.It should be noted that Fig. 1, Fig. 2, Fig. 3 and Fig. 4 are only shown The alongst single PTC heats 1 that D1 extends.PTC heats 1 can be used as the heat source of heating equipment 100. Heating equipment 100 may include multiple PTC heats 1, for example, can arrange along thickness direction D2 multiple shown in FIG. 1 PTC heats 1, or multiple PTC heats 1 can be arranged along width direction D3.PTC heats 1 can be in Matrix distribution.

Referring to fig. 4, PTC heats 1 includes multiple PTC chips 11, multiple PTC chips 11 alongst D1 cloth It sets.PTC chip 11 is workpiece, the origin of heat of PTC heats 1；Fig. 5 is that region indicated by arrow B is put in Fig. 4 The example constructions of PTC heats 1 are illustrated in further detail in big sectional view.Referring to Fig. 5, PTC heats 1 further includes One electrode slice 12 and second electrode sheet 13, first electrode sheet 12 are located at multiple PTC chips 11 and (only show a PTC core in Fig. 5 Piece) the first side (upside in Fig. 5) on thickness direction D2, and second electrode sheet 13 is located at multiple PTC chips 11 in thickness Second side (downside in Fig. 5) on the D2 of direction.Electrode slice 12,13 is that PTC chip 11 provides working power, and is responsible for PTC The work calories of chip 11 are transmitted to outside, can use aluminium alloy, Copper alloy material.In conjunction with Fig. 4 and Fig. 5, two neighboring Region between PTC chip 11 on length direction D1, first electrode sheet 12 and second electrode sheet 13 are respectively formed with the first arch Shape portion 121 and the second arch portion 131.Specifically, first electrode sheet 12 has the first arch towards 13 protrusion of second electrode sheet Portion 121, second electrode sheet 13 have the second arch portion 131 towards 12 protrusion of first electrode sheet, the first arch portion 121 and second Arch portion 131 offsets one from another on width direction D3.

The aluminum pipe 16 that will be described below generally requires full to the safe insulation distance i.e. creepage distance of electrode slice 12,13 Sufficient certain condition.For example, Gisol >=Uiso (VAC)/Tptc, wherein Gisol is creepage distance, and Tptc is the thickness of PTC chip Degree is that Uiso (VAC) is the insulation performance requirement of single aluminum pipe fire-bar, and VAC refers to exchange (AC) voltage, for example, Uiso (VAC) it can be selected as in the testing time being 60s, Leakage Current is the insulation alternating voltage under the test condition of 0.5mA.Below will It can describe, can be set according to above-mentioned requirements about the creepage distance between arch portion 121,131 and aluminum pipe 16.In the prior art In, electrode slice is plate, then creepage distance value is only about the thickness of insulating layer.And creepage distance of the invention is about insulating layer The sum of the depth (namely the size of arch portion on thickness direction D2) of thickness and arch portion portion.Pass through first electrode sheet 12 and Two electrode slices 13 are respectively formed with the first arch portion 121 and the second arch portion 131, increase creepage distance.Due to arch portion The creepage distance that similar PTC heats can be dramatically increased is set, so even if the thickness of insulating layer is reduced, creepage distance Also much larger than the prior art, safety is still better than the prior art, to create conditions for thickness of insulating layer reduction.Two electrode slices 12,13 positive and negative anodes for being separately energized source, the design of two arch portions mutual sequence on width direction D3, so that two Even if person is overlapped in thickness direction upper generate, short circuit does not also occur.In addition, arch portion has between PTC chip on thickness Overlapping, this can constitute PTC chip and position, and existing PTC chip has ceramic false piece to do space/position, and according to the present invention Electrode slice band arch portion in PTC chip designs, thus can remove the grid spacer separately set in the prior art from, can set in satisfaction Reduce the size of PTC chip and the quantity of the false piece of ceramics in the case where meter, therefore PTC heats and assembly weight can be made Amount is much less, to promote assembly efficiency.

In another embodiment, there can be direction in first electrode sheet 12 and second electrode sheet 13 with only one electrode slice The arch portion of another electrode slice protrusion, can increase the creepage distance of an electrode slice, and can also remove positioning from this way Partition.

In illustrated embodiment, PTC heats 1 further includes multiple first insulating layers 14 and multiple second insulating layers 15. Insulating layer 14,15, which can be, provides the flat parts of safe insulation performance for electrode slice 12,13 and aftermentioned aluminum pipe 16, while can It, can be using materials such as polyimides, macromolecule thermal-conducting silicagel pad, ceramic heat-insulated cushions to transfer heat to exterior space.Often One second in first insulating layer 14 and multiple second insulating layers in corresponding multiple first insulating layers of a PTC chip 11 Insulating layer 15, first insulating layer 14 are located at the same side of first electrode sheet 12 (that is, in Fig. 5 relative to PTC chip 11 Upside) and first electrode sheet 12 between this first insulating layer 14 and PTC chip 11, a second insulating layer 15 Relative to PTC chip 11 be located at second electrode sheet 13 same side (that is, downside in Fig. 5) and second electrode sheet 13 between It between one second insulating layer 15 and PTC chip 11, that is to say, in Fig. 5,11 upside of PTC chip is successively first electrode sheet 12 and corresponding this first insulating layer 14,11 downside of PTC chip is successively second electrode sheet 13 and this corresponding Two insulating layers 15.For single aluminum pipe fire-bar, after needing to assemble PTC chip, electrode slice and insulating layer, aluminium is put into Casing carries out hydro-forming, and in the present embodiment, corresponding a pair of of the insulating layer of a piece of PTC chip, insulating layer can use potsherd, It can be effectively reduced the probability of the hydraulic fragmentation of potsherd under same process conditions in this way.Insulating layer adjacent in the longitudinal direction Between insulating layer play movement 14a can be set, when using the soft thermally conductive sheet such as polyimides, macromolecule thermal-conducting silicagel pad The play movement may be not present, and for example, may have the play movement when using hard thermally conductive sheets such as ceramic insulations 14a。

Referring to Fig. 6 and Fig. 7, Fig. 6 be along in Fig. 5 line C-C interception and turned upside down sectional view, Fig. 7 be along The sectional view of line E-E interception in Fig. 5, pays attention to showing two neighboring PTC chip 11 in Fig. 6, and illustrates only and be located in Fig. 5 One PTC chip 11 in left side.Fig. 6 and Fig. 7 more meticulously shows two electrode slices (first electrode sheet 12 and second electrodes Piece 13) two arch portions (the first arch portion 121 and the second arch portion 131) be staggered on width direction D3.First electrode sheet 12 and second electrode sheet 13 be respectively formed with the first notch (not shown) and the second notch 132, the first notch and second cut Mouth 132 respectively corresponds the second arch portion 131 of evacuation and the first arch portion 121 on thickness direction D2.In conjunction with Fig. 5 and Fig. 6, only show The second notch 132 is gone out, and the first notch is not shown, has been described below only for the second notch 132, the effect of the second notch The second notch 132 is similar to position.Second notch 132 is set to second electrode sheet 13, in Fig. 5, is located at first electrode sheet 12 121 lower section of the first arch portion, that is, the second notch 132 corresponding first arch portion 121 on thickness direction D2, thus right The formation of first arch portion 121 keeps away position effect, and second electrode sheet 13 is below the first arch portion 121 for corresponding to first electrode sheet 12 Region at be not provided with the second notch 132, then the second electrode sheet 13 at this may be with the first of first electrode sheet 12 the arch Shape portion 121 (the first arch portion 121 be substantially towards second electrode sheet 13 prominent) forms interference in structure or with first The distance between top of arch portion 121 is too close and electric power is interfered each other.Similarly, unshowned first notch is set to the first electricity Pole piece 12, in Fig. 5 above the second arch portion 131 of second electrode sheet 13, thus the second arch portion 131 of evacuation.First Notch and the second notch 132 can be formed by cutting, for example, with the second notch 132 as an example, can be first by second electrode Piece 13 carries out being bent to form the second arch portion 131, then again on width direction D3 carry out cutting to formed the second notch 132, Or cutting first is carried out to second electrode sheet 13 and forms the predecessor of the second notch 132, then second electrode sheet 13 is carried out curved Folding, to form the second arch portion 131, and the predecessor of the second notch 132 is due to bending function and on length direction D1 Dimensional contraction is to form the second notch 132 in Fig. 5 and Fig. 6.

With continued reference to Fig. 5, Fig. 6 and Fig. 7, although the first arch portion 121 and the second arch portion 131 are wrong on width direction D3 It opens, but the setting position on length direction D1 is identical, and shape and size are identical, in the shown embodiment, first Each arch portion in arch portion 121 and the second arch portion 131 section shown in Fig. 5 (could also say that, perpendicular to width side To the wide to section of D3) on be trapezoidal shape, the top margin of trapezoidal shape is flat side, thus, creepage distance is identical.Further Ground is isosceles-trapezium-shaped in the first arch portion 121 and the second arch portion 131 in embodiment shown in fig. 5.Due to first Arch portion 121 and the second arch portion 131 on width direction D3 other than being staggered, the upper and lower almost symmetry in Fig. 5, so can To increase the interchangeability of component, that is, can be interchanged between first electrode sheet 12 and second electrode sheet 13, therefore system can be reduced Cause this.

Referring to Fig. 3, Fig. 5 and Fig. 7, in PTC heats 1, aluminium is arranged with outside the first insulating layer 14 and second insulating layer 15 Pipe 16.In illustrated embodiment, referring to Fig. 3, aluminum pipe 16 in this view (it may also be said that perpendicular to length direction D1 length to On section) it is hexagon, have along width direction D3 (i.e. in the two sides (i.e. two sides up and down in Fig. 3) on thickness direction D2 Left and right directions in Fig. 3) extend flat side.In addition, being distributed with outside the aluminum pipe 16 of PTC heats 1 in heating equipment 100 Radiating fin 101, so that promptly peritropous gas or liquid are spread by heat caused by PTC heats 1.Aluminum pipe 16 be insulating layer 14,15, and electrode slice 12,13 and PTC chip 11 etc. provide structural support, while transferring heat to external sky Gas and radiating fin 101 can use aluminum alloy material.

Referring to figs. 5 and 6, PTC chip 11 includes chip body 111 and layer electrodes 112, and chip body 111 is in thickness Layer electrodes 112 are provided on two surfaces on the D2 of direction.For example, layer electrodes 112 can spray or be printed on chip sheet The outside of body 111 can be conductive metal electrode, can contact electrode slice 12,13 respectively.Referring to Fig. 6, layer electrodes The 112 area ratio chip body 111 on the section (it may also be said that perpendicular to the thick to section of thickness direction D2) is in the section On area it is small.

Referring to Fig. 3, adjacent layer can be bonded together by using adhesive 17 between each layer, such as in figure Between PTC chip 11 and electrode slice 12,13.

Note that aluminum pipe 16 can directly be contacted with outside, human body is accessible and experiences heat, electrode slice 12,13, PTC Chip 11 is all the workpiece with high-voltage electricity, and insulating layer 14,15 is respectively interposed between aluminum pipe 16 and electrode slice 12,13, from And be that aluminum pipe 16 and electrode slice 12,13 provide safely and effectively electrical isolation spacing, to guarantee the safety of user.

Next some preferred sizes in PTC heats 1 according to the present invention are described, size marking is referring to Fig. 3, figure 5 and Fig. 6.

Referring to Fig. 5, and each arch portion in the first arch portion 121 and the second arch portion 131 (in Fig. 5, the second arch portion 131 top margin) creepage distance between aluminum pipe 16 (lower section aluminum pipe 16) apart from outer layer is Giso1, the thickness of PTC chip 11 (including chip body 111 and upper and lower layer electrodes 112) is Tptc, and the insulation performance of single aluminum pipe fire-bar requires to be Uiso (VAC), wherein Giso1 >=Uiso (VAC)/Tptc.VAC refers to that exchange (AC) voltage, such as Uiso (VAC) can be selected as It is 60s in the testing time, Leakage Current is the insulation alternating voltage under the test condition of 0.5mA.This size requires to expire Sufficient insulating requirements, are determined by test condition and structure size.

As defined above, PTC chip 11 with a thickness of Tptc.

In addition, referring to Fig. 5, each electrode slice in first electrode sheet 12 and second electrode sheet 13 with a thickness of Tetrd.

Referring to Fig. 6, the distance that is staggered of the first arch portion 121 and the second arch portion 131 on width direction D3 is Giso2.

Referring to Fig. 5, the side (right edge in Fig. 5) of PTC chip 11 and the first arch portion 121 and the second arch portion 131 In each arch portion in start the position of protrusion (be first arch portion 121 for the first arch portion 121 in Fig. 5 The top position of left bevel edge) between distance on length direction D1 be Ggap1.

Referring to Fig. 3 and Fig. 6, each insulating layer in the first insulating layer 14 and second insulating layer 15 on width direction D3 with Width spacing between the inward flange of the aluminum pipe 16 of outer layer is Galtrd.

Referring to Fig. 6, the width of each electrode slice in first electrode sheet 12 and second electrode sheet 13 is Wtrd.

Referring to Fig. 6, notch depth of each notch on width direction D3 in the first notch and the second notch 132 is Gtrd2。

Referring to Fig. 5, the end edge of the first notch and each notch in the second notch 132 is (in Fig. 5, for the second notch 132, be left end side) to the bevel edge of the corresponding arch portion in the first arch portion 121 and the second arch portion 131 (in Fig. 5, for the One arch portion 121 is left bevel edge) between vertical range (or it can be said that the end edge of notch and the side to the oblique of arch portion The distance between projection on side) it is Ggap2, it may also be said to, oblique opposite with the second arch portion 131 of the end edge of the first notch Between the end edge and the opposite bevel edge of the first arch portion 121 of vertical range and the second notch 132 between side it is vertical away from From for Ggap2.

Referring to Fig. 6, end of two end edges of the first notch and each notch in the second notch 132 on length direction D1 Back gauge is Gtrd1.

Referring to Fig. 6, the back gauge between the side of layer electrodes 112 and the side of chip body 111 is included in length direction Length on D1 is wide to back gauge Wptctrd2 to back gauge Wptctrd1 and on width direction D3, wherein chip body 111 Width is Wptc, and the width of layer electrodes 112 is Wptctrd, wherein Wptctrd2=(Wptc-Wptctrd)/2.

Referring to Fig. 5, the outer top margin (in Fig. 5, the lower surface of top margin) of the first arch portion 121 is interior with the second arch portion 131 The distance between top margin (in Fig. 5, the lower surface of top margin) is G2etrd.Interior top margin and outer top margin be relative to the trapezoidal shape and Speech, since trapezoidal top margin has thickness, outer side edges are outer top margin, and inner side edge is interior top margin.G2etrd may also be referred to as electricity Pole piece plane difference, the difference size of arch facial planes after the cooperation of two panels electrode slice, G2etrd design value is 0, and actual process Control can satisfy following requirements namely G2etrd≤0.5mm.

Referring to Fig. 5, the trapezoidal angle of the first arch portion 121 and each arch portion in the second arch portion 131 is θ etrd, ladder Shape angle θ etrd is the top margin of arch portion and the angle that bevel edge is constituted.

Preferably, then it can satisfy following size requirement:

(1)Tptc≥2mm；

(2)Tetrd≥0.7mm；

(3) 1.2*Tptc >=Giso2 > Tptc；

(4)Ggap1≥Tptc；

(5)Galtrd≥1mm；

(6) Gtrd2=(Wtrd+Giso2)/2；

(7)Ggap2≥Tptc；

(8)Gtrd1≥Tetrd*2.5；

(9)G2etrd≤0.5mm；

(10) Wptctrd1=Wptctrd2 >=1mm；

(11)θetrd≥90°。

Wherein, size require (1) and (2) determined by material structure characteristic, electrical characteristic, (3), (4), (5), (6), (7), (9), (10) and (11) are required to determine by technological design, structure size, and size requires (8) by test condition and structure size It determines.The effect of all of above dimension combination design is exactly that the optimization of insulation, pressure resistance design is realized under minimum boundary.

Referring to Fig. 5, each insulating layer in the first insulating layer 14 and second insulating layer 15 with a thickness of Tiso, insulating layer thickness The size selection for spending Tiso is related with its used material.When insulating layer uses polyimides, required according to dielectric strength, 1 N layers can be wrapped up in, N >=1；When insulating layer uses macromolecule thermal-conducting silicagel pad, usually 11 layer；When insulating layer uses pottery When porcelain heat conductive insulating pads, usually 1 layer of N piece, N >=1.

The above, the only specific embodiment in the present invention, but scope of protection of the present invention is not limited thereto, appoints What is familiar with the people of the technology within the technical scope disclosed by the invention, it will be appreciated that expects transforms or replaces, and should all cover Within scope of the invention, therefore, the scope of protection of the invention shall be subject to the scope of protection specified in the patent claim.

Claims (14)

1. a kind of PTC heats has length direction, width direction and thickness direction characterized by comprising

Multiple PTC chips are arranged along the length direction；

First electrode sheet, positioned at first side of the multiple PTC chip on the thickness direction；And

Second electrode sheet, positioned at the second side of the multiple PTC chip on the thickness direction；

Wherein, the region between two neighboring PTC chip in the length direction, the first electrode sheet have towards institute The first arch portion of second electrode sheet protrusion is stated, the second electrode sheet has the second arch towards the first electrode sheet protrusion Shape portion, first arch portion and second arch portion offset one from another in the width direction.

2. PTC heats as described in claim 1, which is characterized in that further include multiple first insulating layers and multiple second Insulating layer, each PTC chip correspond to first insulating layer and the multiple second insulation in the multiple first insulating layer A second insulating layer in layer, one first insulating layer are located at the first electrode sheet relative to the PTC chip The same side and first electrode sheet is between one first insulating layer and the PTC chip, one second Same side that insulating layer is located at the second electrode sheet relative to the PTC chip and second electrode sheet is between described one Between a second insulating layer and the PTC chip.

3. PTC heats as claimed in claim 2, which is characterized in that first insulating layer and the second insulating layer It is arranged with aluminum pipe outside.

4. PTC heats as described in claim 1, which is characterized in that the first electrode sheet and the second electrode sheet It is respectively formed with the first notch and the second notch, first notch and second notch are right respectively on the thickness direction Second arch portion and first arch portion should be avoided.

5. PTC heats as described in claim 1, which is characterized in that first arch portion and second arch portion Setting position in the length direction is identical, and shape and size are identical.

6. PTC heats as described in claim 1, which is characterized in that the PTC chip includes chip body and electrode plating Layer, the chip body are provided with the layer electrodes on two surfaces on the thickness direction.

7. PTC heats as claimed in claim 6, which is characterized in that the layer electrodes are perpendicular to the thickness side To the thick area ratio on section described in chip body it is small in the thick area on section.

8. PTC heats as described in claim 1, which is characterized in that first arch portion and second arch portion In each arch portion perpendicular to the width direction width on section be trapezoidal shape.

9. PTC heats as claimed in claim 8, which is characterized in that first arch portion and second arch portion In each arch portion perpendicular to the width direction width on section be isosceles-trapezium-shaped.

10. PTC heats as claimed in claim 3, which is characterized in that first arch portion and second arch portion In creepage distance of each arch portion between the aluminum pipe of outer layer be Giso1, the PTC chip with a thickness of Tptc, the insulation performance of single aluminum pipe fire-bar require to be Uiso (VAC), wherein Giso1 >=Uiso (VAC)/Tptc.

11. PTC heats as claimed in claim 3, which is characterized in that

The first electrode sheet and the second electrode sheet are respectively formed with the first notch and the second notch, first notch and Second notch respectively corresponds on the thickness direction avoids second arch portion and first arch portion；

The PTC chip includes chip body and layer electrodes, two surfaces of the chip body on the thickness direction On be provided with the layer electrodes, also, the layer electrodes are in the thick area on section perpendicular to the thickness direction It is smaller in the thick area on section than the chip body；And

Each arch portion in first arch portion and second arch portion is perpendicular to the wide to cutting of the width direction It is trapezoidal shape on face.

12. PTC heats as claimed in claim 11, which is characterized in that the PTC chip with a thickness of Tptc, it is described Each electrode slice in first electrode sheet and the second electrode sheet with a thickness of Tetrd, first arch portion and described The distance that is staggered of two arch portions in the direction of the width is Giso2, the side of the PTC chip and first arch portion and described Starting the distance between the position of protrusion in the length direction in each arch portion in second arch portion is Ggap1, institute State each insulating layer in the first insulating layer and second insulating layer inner edge with the aluminum pipe of outer layer in the direction of the width Width spacing between edge is Galtrd, and the width of each electrode slice in the first electrode sheet and the second electrode sheet is Wtrd, the notch depth of each notch in the direction of the width in first notch and second notch is Gtrd2, described The end of vertical range and second notch between the end edge of first notch and the opposite bevel edge of second arch portion Vertical range between side and the opposite bevel edge of first arch portion is Ggap2, and first notch and described second is cut The end edge distance of two end edges of each notch in mouthful in the length direction is Gtrd1, the side of the layer electrodes Back gauge between the side of the chip body includes length in the length direction to back gauge Wptctrd1 and in width The width on direction is spent to back gauge Wptctrd2, between the outer top margin of first arch portion and the interior top margin of second arch portion Distance be G2etrd, the trapezoidal angle of first arch portion and each arch portion in second arch portion is θ etrd, In,

Tptc≥2mm；Tetrd≥0.7mm；1.2*Tptc >=Giso2 > Tptc；Ggap1≥Tptc；Galtrd≥1mm； Gtrd2=(Wtrd+Giso2)/2；Ggap2≥Tptc；Gtrd1≥Tetrd*2.5；Wptctrd1=Wptctrd2 >=1mm； G2etrd≤0.5mm；And etrd >=90 ° θ.

13. a kind of PTC heats has length direction, width direction and thickness direction characterized by comprising

Multiple PTC chips are arranged along the length direction；

First electrode sheet, positioned at first side of the multiple PTC chip on the thickness direction；And

Second electrode sheet, positioned at the second side of the multiple PTC chip on the thickness direction；

Wherein, the region between two neighboring PTC chip in the length direction, the first electrode sheet and described second An electrode slice in electrode slice has the arch portion towards another electrode slice protrusion.

14. a kind of heating equipment, which is characterized in that including the PTC heats as described in any one of claims 1 to 13.