Circuit board for PTC heater and PTC heater

Abstract

The utility model relates to a circuit board used for a PTC heater and the PTC heater, the circuit board used for the PTC heater comprises an insulating plate and a plurality of electrode slices embedded in the insulating plate, the electrode slices are arranged at intervals, each electrode slice is provided with a clamping part used for being electrically connected with a PTC heating bag, and the clamping parts are arranged on the insulating plate. One end of each electrode plate is connected with a connecting part used for being electrically connected with a control panel of the PTC heater, and the clamping parts and the connecting parts are exposed out of the insulating plate. By embedding the plurality of electrode plates in the insulating plate, the occupied volume is reduced, the integration level of the circuit board is improved, and the PTC heating bags are connected to the electrode plates of the circuit board through the clamping parts in a clamping manner, so that the operation is simple, the assembly efficiency is high, and the cost is low. According to the circuit board provided by the utility model, only one part is used for replacing an existing mode of realizing collaboration of three parts, so that the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of heating equipment, in particular to a circuit board for a PTC heater and a PTC heater. Background Art

[0002] At present, since the PTC electric heater needs to output different power levels, the PTC heating packs need to be divided into multiple groups for separate control. This makes it difficult to complete the power connection transfer of each heating pack group in a relatively small space. Therefore, a transfer circuit is required to complete the power connection of different heating pack groups and then connect to high-voltage electricity. To solve the above problems, usually a transfer circuit is printed on a busbar, and then multiple heating packs are connected to the busbar through a fixing plate. Then, connection inserts for connecting to the control board of the PTC heater are provided on the busbar. In this way, three parts, namely the busbar, the fixing plate, and the connection inserts, are required to work together, occupying a large space, having low assembly efficiency, and being relatively costly. Summary of the Utility Model

[0003] The main purpose of the utility model is to propose a circuit board for a PTC heater, aiming to solve the problems of large space occupation, low assembly efficiency, and high cost of the existing transfer circuit structure.

[0004] To achieve the above purpose, a circuit board for a PTC heater proposed by the utility model includes an insulating board and a plurality of electrode plates embedded in the insulating board. The electrode plates are spaced apart from each other. Each electrode plate is provided with a clamping portion for electrically connecting to a PTC heating pack. One end of each electrode plate is connected with a connecting portion for electrically connecting to the control board of the PTC heater. Each clamping portion and each connecting portion are respectively exposed outside the insulating board.

[0005] According to some embodiments of the utility model, the insulating board is provided with an installation structure for installing a temperature sensor.

[0006] According to some embodiments of the utility model, each connecting portion is located on the same side of the insulating board.

[0007] According to some embodiments of the utility model, a protective plate is respectively convexly provided on one side of the insulating board close to each connecting portion. Each protective plate is formed with a receiving groove, and each connecting portion is respectively received in each receiving groove.

[0008] According to some embodiments of the utility model, the connecting portion is welded to one end of the electrode plate.

[0009] According to some embodiments of the utility model, each clamping portion includes a metal buckle formed on the electrode plate.

[0010] According to some embodiments of the present utility model, the insulating plate and each of the electrode plates are of an integrally formed structure.

[0011] According to some embodiments of the present utility model, the electrode plate includes a plurality of connecting segments that are sequentially bent and connected.

[0012] According to some embodiments of the present utility model, the electrode plates are adjacent to each other and arranged on the same plane.

[0013] The present utility model also provides a PTC heater, which includes a control board, a plurality of PTC heating packs, and the circuit board for the PTC heater described above. Each of the clamping portions is electrically connected to each of the PTC heating packs, and each of the connecting portions is electrically connected to the control board.

[0014] The present utility model has at least the following beneficial effects:

[0015] By embedding a plurality of electrode plates in the insulating plate, the present utility model reduces the occupied volume and improves the integration degree of the circuit board. Moreover, each PTC heating pack is respectively connected to the electrode plate of the circuit board in a clamping manner through the clamping portion, with simple operation and high assembly efficiency. The circuit board provided by the present novel only uses one part to replace the existing method that requires three parts to cooperate, reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 FIG. is a schematic structural diagram of a circuit board for a PTC heater provided by an embodiment of the present utility model;

[0018] Figure 2 For Figure 1 the exploded view of the circuit board in

[0019] Figure 3 For Figure 1 the schematic structural diagram of the electrode plate in

[0020] Figure 4 For Figure 3 the partial enlarged view of A in

[0021] Description of the reference numerals:

[0022] 100-circuit board; 1-insulating board; 11-mounting structure; 12-protective board; 14-cable slot; 2-electrode sheet; 21-clamping part; 211-metal buckle; 22-connecting part; 23-connecting section. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0025] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0026] The utility model provides a circuit board for a PTC heater. Figures 1-4 A specific embodiment of a circuit board for a PTC heater provided by the utility model.

[0027] like Figure 1 and Figure 2, an embodiment of the present utility model provides a circuit board 100 for a PTC heater, which includes an insulating board 1 and a plurality of electrode plates 2 embedded in the insulating board 1. The electrode plates 2 are arranged at intervals, and each electrode plate 2 is provided with a clamping portion 21 for electrically connecting with a PTC heating pack. One end of each electrode plate 2 is connected with a connecting portion 22 for electrically connecting with the control board of the PTC heater. Each clamping portion 21 and each connecting portion 22 are respectively exposed outside the insulating board 1.

[0028] In the present utility model, the working principle of the circuit board 100 for a PTC heater is as follows: First, a plurality of PTC heating packs are respectively connected to each electrode plate 2 through the clamping portion 21. Since the electrode plates 2 are separately arranged, independent heating circuits are respectively formed on each electrode plate 2. Then, each electrode plate 2 is connected to the control board of the PTC heater through the connecting portion 22. While the control board can provide high-voltage electricity for the circuit board 100, it can also respectively control the opening and closing of each heating circuit, so as to realize the output of heating powers at different gears and meet the shifting heating function required by the PTC heater.

[0029] It should be noted that the number of clamping portions 21 on each electrode plate 2 is not specifically limited, and can be specifically selected according to the number of heating packs to be installed. The heating packs installed on the same electrode plate 2 are connected in parallel. The number of heating packs installed on each electrode plate 2 can be the same or different. For example, two heating packs can be installed on one electrode plate 2 and four heating packs can be installed on one electrode plate 2. Then, the control board can respectively control the opening and closing of the above two electrode plates 2. When the former is turned on and the latter is turned off, two heating packs on the entire circuit board 100 work and generate heat. When the former is turned off and the latter is turned on, four heating packs on the entire circuit board 100 work and generate heat. When the former is turned on and the latter is turned on, six heating packs on the entire circuit board 100 work and generate heat. In this way, the heating requirements at three gears are realized. It can be understood that the number of heating packs and the number of electrode plates 2 adopted above are only for example, and can be specifically adjusted according to actual needs.

[0030] By embedding a plurality of electrode plates 2 in the insulating board 1, the present utility model reduces the occupied volume and improves the integration degree of the circuit board 100. Moreover, each PTC heating pack is respectively connected to the electrode plate 2 of the circuit board 100 in a clamping manner through the clamping portion 21, with simple operation and high assembly efficiency. The circuit board 100 provided by the present utility model only uses one part to replace the existing way that three parts cooperate to realize, reducing the production cost.

[0031] It can be understood that when the PTC heater is actually applied, the temperature of the cooling medium needs to be monitored in real time. Therefore, a temperature sensor needs to be arranged in the PTC heater. In some embodiments, the insulating plate 1 is provided with an installation structure 11 for installing the temperature sensor. In this way, additional installation structures can be avoided, thereby reducing the installation space, improving the integration degree of the internal structure of the PTC heater, and facilitating the miniaturized design of the product. It should be noted that the installation structure 11 is not specifically limited. In this embodiment, the installation structure 11 includes an installation groove or an installation hole 13 formed on the insulating plate 1.

[0032] In addition, there are often several wiring harnesses inside the PTC heater. Therefore, in some embodiments, a wire slot 14 is also formed on the insulating plate 1. The wire slot 14 can orderly organize and fix the wiring on the circuit board 100, acting as a wire to prevent the lines from being messy, and can also play a fixing role to reduce the shaking of the PTC heater caused by vehicle vibration.

[0033] Specifically, in some embodiments, each of the connecting portions 22 is located on the same side of the insulating plate 1. In this way, each of the connecting portions 22 can be connected to the control board on the same side respectively, optimizing the circuit layout of the circuit board 100, thereby saving space occupancy.

[0034] Specifically, in order to further protect the connecting portions 22, in some embodiments, a protective plate 12 is respectively convexly provided on one side of the insulating plate 1 close to each of the connecting portions 22. A receiving groove is formed on each of the protective plates 12, and each of the connecting portions 22 is respectively received in each of the receiving grooves. The protective plate 12 can protect the connecting portions 22 and reduce the circuit interference between different electrode plates 2. It can be understood that when each of the connecting portions 22 is located on the same side of the insulating plate 1, for example, please refer to Figure 1 , only one protective plate 12 can be convexly provided on one side of the insulating plate 1 close to each of the connecting portions 22. A plurality of receiving grooves are formed on the protective plate 12, and each of the connecting portions is respectively received in each of the receiving grooves. In this way, the receiving grooves provided on the same protective plate 12 can isolate each of the connecting portions 22 from each other, reducing the circuit interference between different electrode plates 2.

[0035] It should be noted that the connecting portion 22 is not specifically limited. In this embodiment, the connecting portion 22 includes a high-voltage input electrode column. One end of the high-voltage input electrode column is welded to one end of the electrode plate 2, and can be welded by ultrasonic welding, riveting, or spot welding to ensure a certain required connection strength, so as not to cause detachment due to the vibration of the whole vehicle, and at the same time, the problem of contact resistance at the connection can be avoided.

[0036] Specifically, please refer to Figure 4 , in some embodiments, each of the clamping portions 21 includes a metal buckle 211 formed on the electrode sheet 2. By connecting the metal buckles 211, the operation is simple and the assembly efficiency is greatly increased. The clamping portion 21 further includes an assembly hole formed on the insulating plate 1, and the metal buckle 211 protrudes from the edge of the assembly hole. It should be noted that the number of metal buckles 211 included in the clamping portion 21 is not specifically limited and can be set to multiple. For example Figure 4 , in

[0037] , the clamping portion 21 includes three metal buckles 211.

[0038] Specifically, in some embodiments, the electrode sheets 2 are adjacently arranged on the same plane. In this way, the space utilization rate is improved, and the stacking of the electrode sheets 2 can be avoided to reduce the hindrance of current transmission in each electrode sheet 2. Moreover, through the electrode sheets 2 laid flat on the same plane, the heat dissipation effect can be improved.

[0039] Specifically, in some embodiments, the electrode sheet 2 includes a plurality of connecting segments 23 that are sequentially bent and connected. Through the bent and connected connecting segments 23, when arranging the electrode sheets 2, the electrode sheets 2 can be made to be adjacent to each other more closely, so that when embedded in the insulating plate 1, it occupies a smaller area, which is beneficial to the miniaturized design of the circuit board. The specific shape of the bend of the electrode sheet is not limited. For example, please refer to Figure 3 , the connecting segment 23 of the electrode sheet 2 can be bent to form an L-shaped electrode sheet 2, a U-shaped electrode sheet 2, an O-shaped electrode sheet 2, etc.

[0040] Specifically, in some embodiments, the thickness of the insulating plate 1 is greater than or equal to 2 mm to ensure a certain insulation strength even under high-voltage conditions, so as to meet the use of the electric heater under high-voltage conditions.

[0041] Specifically, the electrode sheet 2 includes a metal electrode sheet 2, and the insulating plate 1 includes a plastic plate.

[0042] The present utility model further provides a PTC heater, which includes a control board, a plurality of PTC heating packs, and the above-mentioned circuit board 100 for the PTC heater. Each of the clamping portions 21 is electrically connected to each of the PTC heating packs, and each of the connecting portions 22 is electrically connected to the control board. The structure of the circuit board 100 solves the problems of large space occupation, low assembly efficiency and high cost of the existing adapter circuit structure.

[0043] The foregoing are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A circuit board for a PTC heater, characterized in that, It includes an insulating board and a plurality of electrode sheets embedded in the insulating board. The electrode sheets are arranged at intervals, and each electrode sheet is provided with a clamping portion for electrically connecting with a PTC heating pack. One end of each electrode sheet is connected with a connecting portion for electrically connecting with the control board of the PTC heater. Each clamping portion and each connecting portion are respectively exposed outside the insulating board.

2. The circuit board for a PTC heater according to claim 1, characterized in that, The insulating board is provided with an installation structure for installing a temperature sensor.

3. The circuit board for a PTC heater according to claim 1, characterized in that, Each connecting portion is located on the same side of the insulating board.

4. The circuit board for a PTC heater according to claim 1, characterized in that, On the side of the insulating board close to each connecting portion, a protective board is respectively convexly provided. Each protective board is formed with a receiving groove, and each connecting portion is respectively correspondingly accommodated in each receiving groove.

5. The circuit board for a PTC heater according to claim 1, characterized in that, The connecting portion is welded to one end of the electrode sheet.

6. The circuit board for a PTC heater according to claim 1, characterized in that, Each clamping portion includes a metal buckle formed on the electrode sheet.

7. The circuit board for a PTC heater according to claim 1, characterized in that, The insulating board and each electrode sheet are of an integrally formed structure.

8. The circuit board for a PTC heater according to claim 1, characterized in that, Each electrode sheet is adjacently arranged on the same plane.

9. The circuit board for a PTC heater according to claim 1, characterized in that, The electrode sheet includes a plurality of connecting segments that are sequentially bent and connected.

10. A PTC heater, characterized in that, It includes a control board, a plurality of PTC heating packs, and the circuit board for the PTC heater according to any one of claims 1-9. Each clamping portion is respectively electrically connected with each PTC heating pack, and each connecting portion is respectively electrically connected with the control board.

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