CN111586907A

CN111586907A - Heater assembly and ptc heater

Info

Publication number: CN111586907A
Application number: CN202010613832.6A
Authority: CN
Inventors: 岳珩; 唐枝萍; 胡小华
Original assignee: Chongqing Chaoli Hi Tech Co Ltd
Current assignee: Chongqing super force electric appliance Co.,Ltd.
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2020-08-25

Abstract

The invention provides a heater assembly and a ptc heater, wherein the heater assembly comprises a first electrode plate, a second electrode plate, a ceramic plate group and two heat-conducting insulating plates, the ceramic plate group is clamped between the first electrode plate and the second electrode plate, the two heat-conducting insulating plates are respectively attached to the outer side of the first electrode plate and the outer side of the second electrode plate, and at least one heat-conducting insulating plate is used for being in direct contact with a to-be-heated member so as to conduct heat to the to-be-heated member. The heater assembly has high heating efficiency, energy conservation, light weight and convenient transportation and installation.

Description

Heater assembly and ptc heater

Technical Field

The invention relates to the field of heating equipment, in particular to a heater assembly and a ptc heater.

Background

At present, a vehicle-mounted air conditioning system comprises a ptc (Positive Temperature Coefficient thermistor) heater, when the vehicle-mounted air conditioning system heats, the ptc heater generates heat under high voltage or low voltage through a ceramic chip, the heat is transferred to cooling liquid of the vehicle-mounted system, and the cooling liquid heats a passenger cabin through a heater of an air conditioning box.

The existing ptc heaters have been found to have the following disadvantages:

the heating efficiency is low.

Disclosure of Invention

An object of the present invention is to provide a heater assembly and a ptc heater which can improve heating efficiency.

The embodiment of the invention is realized by the following steps:

in a first aspect, an embodiment of the present invention provides a heater assembly, including:

first electrode piece, second electrode piece, ceramic chip group and two heat conduction insulation boards, ceramic chip group is by centre gripping between first electrode piece and second electrode piece, and two heat conduction insulation boards laminate with the outside of first electrode piece and the outside of second electrode piece respectively, at least one heat conduction insulation board be used for with wait to add the heat piece direct contact to with the heat conduction extremely wait to add on the heat piece.

In an alternative embodiment, the thermally conductive insulating plate is a ceramic insulating plate.

In an alternative embodiment, the ceramic sheet group comprises a plurality of ceramic sheets arranged in sequence, adjacent ceramic sheets in the same group are attached, and two opposite sides of each ceramic sheet are respectively attached to the first electrode sheet and the second electrode sheet.

In an optional embodiment, the number of the ceramic plate groups is multiple, and the multiple ceramic plate groups are arranged at intervals; the number of the first electrode plates is the same as that of the ceramic plate groups, and the plurality of ceramic plate groups are correspondingly attached to the plurality of first electrode plates one to one.

In an alternative embodiment, the first and second electrode sheets are both bonded to the ceramic sheet pack.

In an alternative embodiment, the first and second electrode sheets are both bonded to the thermally conductive insulating plate.

In a second aspect, an embodiment of the present invention provides a ptc heater, comprising:

the heater assembly of any of the preceding embodiments.

In an alternative embodiment, the ptc heater further comprises a first flow field plate and a second flow field plate, the first flow field plate is connected to the second flow field plate, the heater assembly is sandwiched between the first flow field plate and the second flow field plate, and the two heat-conducting insulating plates of the heater assembly are in direct contact with the first flow field plate and the second flow field plate, respectively.

In an alternative embodiment, the first flow channel plate is provided with a first flow channel, which has at least one bend in its extension.

In an alternative embodiment, a second flow channel is provided on the second flow channel plate, which second flow channel has at least one bend in its direction of extent.

The embodiment of the invention has the beneficial effects that:

to sum up, this embodiment provides a heater module, including ceramic chip set, two electrode slices and two heat conduction insulation boards, two electrode slices laminates in the relative both sides of ceramic chip set, and two heat conduction insulation boards laminates in two electrode slice outsides. During the use, with heater module with wait to add the heat-insulating material cooperation, it is specific, with heater module's heat conduction insulation board direct with wait to add the heat-insulating material contact, with two electrode slices respectively with the anodal and negative pole electricity of power and be connected, the pottery piece group generates heat, with the heat through heat conduction insulation board direct conduction to wait to add on the heat-insulating material. Because the heat-conducting insulating plate is in direct contact with the to-be-heated member, the heat resistance between the heat-conducting insulating plate and the to-be-heated member is small, and the heat transfer efficiency is high, so that the heating efficiency of the heater assembly is high, and the energy is saved. Meanwhile, the heater assembly is simple in structure, lighter in weight compared with the traditional heater assembly, and convenient to transport and assemble.

The embodiment also provides a ptc heater, which comprises the heater assembly, and has the advantages of light weight, high heating efficiency, energy saving and environmental protection.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is an exploded view of a heater assembly according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a modified structure of a heater assembly according to an embodiment of the present invention (the heat conductive insulating plate is not shown);

FIG. 3 is a schematic structural view of another modified structure of the heater assembly according to the embodiment of the present invention (the heat conductive insulating plate is not shown);

FIG. 4 is a schematic diagram of the structure of a ptc heater according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of an exploded view of a ptc heater according to an embodiment of the present invention;

FIG. 6 is a schematic structural view of a first flow field plate according to an embodiment of the present invention;

fig. 7 is a schematic structural view of a second flow field plate according to an embodiment of the present invention.

Icon:

a 001-ptc heater; 100-a heater assembly; 110-a first electrode sheet; 120-a second electrode sheet; 130-ceramic sheet groups; 140-a thermally conductive insulating plate; 150-a plug; 200-mounting a housing; 210-a first mounting lug; 220-a second mounting lug; 300-a cover body; 310-a third mounting lug; 400-a circuit board; 500-a first flow field plate; 510-a first flow channel; 520-an inlet; 521-a water inlet pipe; 530-an outlet; 531-water outlet pipe; 540-a first barrier strip; 550-a first split bar; 551-first sub-flow channel; 560 — first mounting side; 570-a second mounting side; 580-first connection hole; 590-second connection hole; 591-mounting bosses; 600-a second flow field plate; 610-a second flow channel; 620-a second barrier strip; 630-third connection hole; 640-a fourth connection hole; 650-a fourth mounting lug; 660-a fifth mounting lug; 670-a third mounting side; 680-a fourth mounting side; 700-a runner cover plate; 710-a sixth mounting lug; 800-sealing ring.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to fig. 3, the present embodiment provides a heater assembly 100, which can be applied to a vehicle air conditioning system to heat a cooling liquid of the vehicle air conditioning system, and obviously, the heater assembly 100 can also be applied to other environments requiring heating, which are not illustrated in the present embodiment. The heater assembly 100 has high heating efficiency, light weight and low manufacturing cost.

Referring to fig. 1, in the present embodiment, the heater assembly 100 includes a first electrode sheet 110, a second electrode sheet 120, a ceramic sheet set 130, and two heat-conducting insulating plates 140, the ceramic sheet set 130 is clamped between the first electrode sheet 110 and the second electrode sheet 120, the two heat-conducting insulating plates 140 are respectively attached to the outer side of the first electrode sheet 110 and the outer side of the second electrode sheet 120, and at least one heat-conducting insulating plate 140 is used for directly contacting with a member to be heated, so as to conduct heat to the member to be heated.

The heater module 100 that this embodiment provided, when using, with heater module 100 with wait to add the heat piece cooperation, specifically, with heater module 100's heat conduction insulation board 140 direct with wait to add the heat piece contact, with two electrode slices respectively with the anodal and negative pole electricity of power and be connected, pottery piece group 130 generates heat, with the heat through heat conduction insulation board 140 direct conduction to wait to add on the heat piece. Since the heat-conducting insulating plate 140 is in direct contact with the member to be heated, the thermal resistance between the two is small, and the heat transfer efficiency is high, so that the heating efficiency of the heater assembly 100 is high, and the energy is saved. Meanwhile, the heater assembly 100 has a simple structure, is lighter in weight than the conventional heater assembly 100, and is convenient to transport and assemble.

It should be noted that the heater assembly 100 may be a flow channel plate having a flow channel for heating a fluid, such as a coolant, flowing through the flow channel. Alternatively, the heater assembly 100 may be sandwiched between two flow field plates, with two thermally conductive insulating plates 140 in direct contact with the two flow field plates, respectively, to heat the fluid through the flow field plates.

In this embodiment, optionally, the number of the ceramic sheet groups 130 may be multiple, the multiple ceramic sheet groups 130 are arranged at intervals, and the distance between adjacent ceramic sheet groups 130 is set as required.

Each ceramic sheet set 130 includes a plurality of ceramic sheets, the plurality of ceramic sheets of the same ceramic sheet set 130 are sequentially arranged, two adjacent ceramic sheets are attached, and two opposite sides of the plurality of ceramic sheets of the same set are respectively attached to the first electrode sheet and the second electrode sheet 120. In other words, a plurality of ceramic sheets are each laid between the first and

second electrode sheets

110 and 120.

Optionally, a plurality of ceramic sheet sets 130 are all clamped between the same first electrode sheet 110 and the same second electrode sheet 120, and when the first electrode sheet 110 and the second electrode sheet 120 are powered on, all the ceramic sheet sets 130 can simultaneously generate heat.

Referring to fig. 2 or fig. 3, in other embodiments, at least two ceramic sheet groups 130 do not share the first electrode sheet 110, for example, the number of the first electrode sheets 110 is equal to the number of the ceramic sheet groups 130, each ceramic sheet group 130 is correspondingly attached with one first electrode sheet 110, and a plurality of ceramic sheet groups 130 share one second electrode sheet 120. Each of the first electrode sheet 110 and the second electrode sheet 120 may form an independent path, and the on/off of the corresponding path is controlled by different switches, so that after the first electrode sheet 110 and the second electrode sheet 120 are electrified, the ceramic sheet set 130 between the corresponding first electrode sheet 110 and the corresponding second electrode sheet 120 is heated. In other words, each of the plurality of ceramic sheet sets 130 is independently arranged, and each of the plurality of ceramic sheet sets 130 can be controlled by the corresponding switch, so as to heat the corresponding ceramic sheet set 130, thereby reducing current fluctuation during power regulation.

For example, in the present embodiment, the number of the ceramic sheet groups is three, the number of the first electrode sheets 110 is three, and the three first electrode sheets 110 are respectively attached to the three ceramic sheet groups 130. Further, the shape and position of each ceramic sheet set 130 member are set as needed, and are not particularly limited.

It should be noted that the first electrode plate 110 may be connected to a positive electrode, and correspondingly, the second electrode plate 120 is connected to a negative electrode; obviously, the first electrode sheet 110 may be connected to the negative electrode, and the second electrode sheet 120 may be connected to the positive electrode. In addition, a first pin may be disposed on the first electrode plate 110, and a second pin may be disposed on the second electrode plate 120, and the pins are integrated together to form a plug 150, so as to facilitate connection with a control system, which includes the circuit board 400, and the plug 150 is electrically connected with the circuit board 400.

In this embodiment, optionally, the ceramic sheets may be rectangular plate-shaped, and the plurality of ceramic sheets are tiled in a manner that the length side surfaces of the adjacent ceramic sheets are attached to each other.

Alternatively, both the first electrode sheet 110 and the second electrode sheet 120 may be provided as rectangular sheets.

In this embodiment, the ceramic sheet is adhered and fixed to the first electrode sheet 110 and the second electrode sheet 120. For example, a thermally conductive adhesive may be used for adhesive attachment.

In this embodiment, optionally, the two heat-conducting insulating plates 140 are attached to the outer sides of the first electrode sheet 110 and the second electrode sheet 120, and the heat-conducting insulating plates 140 may completely cover the outer sides of the first electrode sheet 110 and the second electrode sheet 120, so as to enhance the insulating effect.

In addition, when the number of the first or

second electrode sheets

110 or 120 is plural, the heat conductive insulating plate 140 may cover the plural first and

second electrode sheets

110 and 120 at the same time.

The heat-conducting insulating plate 140, the first electrode sheet 110, and the second electrode sheet 120 are fixed by bonding, for example, the heat-conducting insulating plate 140, the first electrode sheet 110, and the second electrode sheet 120 are fixed by bonding with a heat-conducting adhesive.

It should be understood that the thermally conductive insulating plate 140 may be, but is not limited to, a ceramic insulating plate.

The heater assembly 100 provided by the embodiment has the advantages of high heating efficiency, simple structure and light weight.

Referring to fig. 4 to 7, the present embodiment further provides a ptc heater 001, which includes a mounting case 200, a cover 300, a circuit board 400, a first flow channel plate 500, a second flow channel plate 600, a flow channel cover plate 700, and the heater assembly 100 according to the above embodiments.

The circuit board 400 is disposed in a cavity formed by the mounting case 200 and the cover 300, the first flow channel plate 500 is hermetically connected to a side of the mounting case 200 away from the cover 300, and a first flow channel 510 is disposed on a side of the first flow channel plate 500 facing the mounting case 200. The first flow field plate 500 is further provided with an inlet 520 and an outlet 530, and the inlet 520 is communicated with one end of the first flow field 510. The second flow field plate 600 is connected to one side of the first flow field plate 500 away from the mounting case 200, a second flow field 610 is disposed on one side of the second flow field plate 600 away from the first flow field plate 500, the heater assembly 100 is clamped between the first flow field plate 500 and the second flow field plate 600, and the two heat-conducting insulation plates 140 of the heater assembly 100 are in direct contact with the first flow field plate 500 and the second flow field plate 600, respectively. The flow channel cover plate 700 is hermetically connected to a side of the second flow channel plate 600 facing away from the first flow channel plate 500, one end of the second flow channel 610 on the second flow channel plate 600 is communicated with the other end of the first flow channel 510, and the second flow channel 610 is communicated with the outlet 530 on the first flow channel plate 500, so that the fluid flows in from the inlet 520, passes through the first flow channel 510 and the second flow channel 610, and then flows out from the outlet 530, and during the flowing process of the fluid, the heater assembly 100 exchanges heat with the fluid.

Referring to fig. 6, optionally, a plurality of first barrier strips 540 are disposed on the first flow channel plate 500, the plurality of first barrier strips 540 are arranged at intervals along the extending direction of the first flow channel 510, the first flow channel 510 has a first mounting side 560 and a second mounting side 570 perpendicular to the extending direction, one end of each of two adjacent first barrier strips 540 is connected to the first mounting side 560 and the second mounting side 570, and correspondingly, the other end of each of two adjacent first barrier strips 540 has a distance from the second mounting side 570 and the first mounting side 560, so that the first flow channel forms at least one bending section, thereby changing the flowing direction of the fluid in the first flow channel, prolonging the flowing time of the fluid in the first flow channel 510, and improving the heat exchange efficiency between the fluid and the heat-conducting insulating plate 140.

Optionally, the number of the first barrier strips 540 is four, and barrier strips a, b, c and d are sequentially arranged in the extending direction of the first flow channel 510, the barrier strips a and c are both connected to the first mounting side 560, and the barrier strips b and d are both connected to the second mounting side 570. The inlet 520 is disposed on one side of the barrier rib a away from the barrier rib b and located on the first mounting side 560, the first flow channel plate 500 is provided with a first connection hole 580 for communicating with the second flow channel 610 on one side of the barrier rib d away from the barrier rib c, and the first connection hole 580 communicates with the first flow channel 510. The first flow channel plate 500 is further provided with a second connection hole 590 for communicating with the second flow channel 610 at a side where the first connection hole 580 is provided, the second connection hole 590 simultaneously communicates with the outlet 530, and the first connection hole 580 and the second connection hole 590 are independent from each other.

Optionally, a plurality of first flow-dividing strips 550 are further disposed in the first flow channel 510, the first flow-dividing strips 550 are disposed in a direction perpendicular to the first flow channel 510, and two ends of the first flow-dividing strips 550 are spaced from the first mounting side 560 and the second mounting side 570, the first flow-dividing strips 550 divide the first flow channel 510 into a plurality of first sub-flow channels 551, the plurality of first flow-dividing strips 550 have a fin function, and when flowing in the first flow channel 510, the fluid contacts the plurality of first flow-dividing strips 550, so that a heat exchange area of the fluid is increased, and heat exchange efficiency is improved.

Optionally, the first flow path plate 500 is provided with a plurality of mounting convex portions 591, the number of the mounting convex portions 591 is plural, and the plurality of mounting convex portions 591 are arranged at intervals along the circumferential direction of the first flow path plate 500. Each of the mounting protrusions 591 is provided with a screw hole penetrating through the mounting protrusion 591 in the thickness direction of the first flow passage plate 500.

Optionally, the mounting shell 200 is provided with a first mounting lug 210 and a second mounting lug 220, and the first mounting lug 210 and the second mounting lug 220 are both provided with threaded holes.

Optionally, a third mounting lug 310 is provided on the cover 300.

Referring to fig. 7, optionally, a plurality of second barrier strips 620 are installed on one side of the second flow channel plate 600 facing away from the second flow channel plate 600, the plurality of second barrier strips 620 are arranged at intervals along the extending direction of the second flow channel 610, the second flow channel 610 has a third installation side 670 and a fourth installation side 680 perpendicular to the extending direction, one end of each of two adjacent second barrier strips 620 is connected to the third installation side 670 and the fourth installation side 680, and correspondingly, the other end of each of two adjacent second barrier strips 620 has a distance from the fourth installation side 680 and the third installation side 670, so that the second flow channel forms at least one bent section, thereby changing the flowing direction of the fluid in the second flow channel, prolonging the flowing time of the fluid in the second flow channel 610, and improving the heat exchange efficiency between the fluid and the heat-conducting insulation plate 140.

Optionally, the second flow field plate 600 is provided with a third connection hole 630 and a fourth connection hole 640, which are independent of each other, and both the third connection hole 630 and the fourth connection hole 640 are communicated with the second flow channel 610.

Optionally, a plurality of second shunt strips are further disposed in the second flow channel 610, the second shunt strips are disposed in a direction perpendicular to the second flow channel 610, and two ends of each second shunt strip are spaced from the third mounting side 670 and the fourth mounting side 680 respectively, the second shunt strips separate the second flow channel 610 to form a plurality of second sub-flow channels, the plurality of second shunt strips have a fin function, and when fluid flows in the second flow channel 610, the fluid contacts the plurality of second shunt strips, so that a heat exchange area of the fluid is increased, and heat exchange efficiency is improved.

Optionally, a plurality of fourth mounting lugs 650 and a plurality of fifth mounting lugs 660 are disposed on the second flow field plate 600, and threaded holes are disposed on the fourth mounting lugs 650 and the fifth mounting lugs 660.

Optionally, a plurality of sixth mounting lugs 710 are disposed on the flow passage cover plate 700, and each sixth mounting lug 710 is provided with a threaded hole.

In the ptc heater 001 according to the present embodiment, when being assembled, the circuit board 400 is accommodated between the mounting case 200 and the cover 300, the second mounting lugs 220 on the mounting case 200 correspond to the third mounting lugs 310 on the cover 300 one by one, and the second mounting lugs 220 and the third mounting lugs 310 are fixedly connected by being screwed into the threaded holes communicating with each other through screws. The first flow path plate 500 is attached to the mounting case 200 at a side thereof having the first flow path 510, and a seal ring 800 is provided at a circumferential direction of a connection position of the first flow path plate and the mounting case 200, and the plurality of mounting protrusions 591 of the first flow path plate 500 correspond to the plurality of first mounting lugs 210 of the mounting case 200 one-to-one, and are screwed by screws. An inlet pipe 521 and an outlet pipe 531 are provided at the inlet 520 and the outlet 530 of the first flow path plate 500, respectively. The heater assembly 100 is sandwiched between the first flow field plate 500 and the second flow field plate 600, the two heat conductive insulation plates 140 of the heater assembly 100 are in direct contact with the first flow field plate 500 and the second flow field plate 600, respectively, the plug 150 of the heater assembly 100 integrated by the pins of the first electrode tab 110 and the second electrode tab 120 is electrically connected to the circuit board 400, and the second flow channel 610 on the second flow field plate 600 faces away from the heater assembly 100. The fourth mounting lugs 650 of the second flow field plate 600 and the mounting protrusions 591 of the first flow field plate 500 are engaged to fixedly connect them by screws. The first connection hole 580 of the first flow field plate 500 communicates with the third connection hole 630 of the second flow field, and the second connection hole 590 of the first flow field plate 500 communicates with the fourth connection hole 640 of the second flow field plate 600. The flow channel cover plate 700 covers the side of the second flow channel plate 600 where the second flow channel 610 is disposed, and a sealing ring 800 is disposed at a connection position of the flow channel cover plate 700 and the second flow channel 610 to achieve a sealed connection therebetween. The sixth mounting lugs 710 of the flow channel cover plate 700 are matched with the fifth mounting lugs 660 of the second flow channel plate 600, and the fixed connection between the sixth mounting lugs and the fifth mounting lugs 660 is realized through screws.

In the ptc heater 001 of the present embodiment, the cooling fluid enters from the inlet pipe 521, flows in the first flow path 510, enters from the first connection hole 580 into the second flow path 610, flows in the second flow path 610, returns to the second connection hole 590 from the fourth connection hole 640 of the second flow path 610, and flows out from the outlet pipe 531, and the cooling fluid exchanges heat with the heat generated by the heater assembly 100 during the flow. The heat-conducting insulating plate 140 of the heater assembly 100 directly contacts with the runner plate, so that the heat-conducting effect is good and the heating efficiency is high.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A heater assembly, comprising:

first electrode slice, second electrode slice, ceramic chip group and two heat conduction insulation boards, ceramic chip group by the centre gripping in first electrode slice with between the second electrode slice, two heat conduction insulation boards respectively with the outside of first electrode slice with the outside laminating of second electrode slice, at least one heat conduction insulation board is used for with treating heating member direct contact to with the heat conduction extremely treat on the heating member.

2. The heater assembly of claim 1, wherein:

the heat-conducting insulating plate is a ceramic insulating plate.

3. The heater assembly of claim 1, wherein:

the ceramic chip group comprises a plurality of ceramic chips which are arranged in sequence, the ceramic chips which are adjacent in the same group are attached, and two opposite sides of each ceramic chip are respectively attached to the first electrode plate and the second electrode plate.

4. The heater assembly of claim 1, wherein:

the number of the ceramic plate groups is multiple, and the ceramic plate groups are arranged at intervals; the number of the first electrode plates is the same as that of the ceramic plate groups, and the ceramic plate groups are correspondingly attached to the first electrode plates one by one.

5. The heater assembly of claim 1, wherein:

the first electrode plate and the second electrode plate are both bonded with the ceramic sheet set.

6. The heater assembly of claim 1, wherein:

the first electrode plate and the second electrode plate are both bonded with the heat-conducting insulating plate.

7. A ptc heater, characterized in that the ptc heater comprises:

the heater assembly of any one of claims 1-6.

8. The ptc heater of claim 7, wherein:

the ptc heater further comprises a first flow channel plate and a second flow channel plate, the first flow channel plate is connected with the second flow channel plate, the heater assembly is clamped between the first flow channel plate and the second flow channel plate, and two heat-conducting insulating plates of the heater assembly are in direct contact with the first flow channel plate and the second flow channel plate respectively.

9. The ptc heater of claim 8, wherein:

the first flow channel plate is provided with a first flow channel, and the first flow channel is provided with at least one bending section in the extending direction of the first flow channel.

10. The ptc heater of claim 8, wherein:

the second flow channel plate is provided with a second flow channel, and the second flow channel is provided with at least one bending section in the extending direction of the second flow channel.