High-pressure air heating PTC heater structure

Abstract

The utility model discloses a high-pressure air heating PTC heater structure. The PTC heater comprises a PTC heater body composed of an upper base, a lower base and PTC heating core assemblies arranged in the upper base and the lower base, the head of the PTC heater body is further provided with an upper-layer confluence plate and a lower-layer confluence plate which are arranged in a layered mode, and an electric gap is formed between the upper-layer confluence plate and the lower-layer confluence plate. The upper-layer bus board and the lower-layer bus board are respectively provided with an outgoing line connected with an external high-voltage end, and the outgoing lines of the upper-layer bus board and the lower-layer bus board are electrically connected with the external high-voltage end after being led out. The system has the advantages that control is performed through the controller of the compressor, two-in-one integration is achieved, the overall cost can be reduced, PWM regulation and control can be performed on the heater, and energy conservation and endurance of the whole vehicle are facilitated; and meanwhile, due to the hierarchical design of confluence, gear-type gears can be reserved, and when PWM regulation and control are not needed to be carried out on the heater, a whole vehicle relay is directly used for controlling a switch of the heater.

Description

Technical Field

[0001] The utility model relates to a PTC heater, in particular to a high-voltage air-heating PTC heater structure for new energy vehicles. Background Art

[0002] PTC heaters are widely used in new energy vehicles. Existing conventional air-heating PTC heaters for new energy vehicles are generally divided into two types, one is the gear type, and the other is the integrated control type. Among them, for the control methods of the two air-heating PTC heaters, the gear type is mainly divided into 3 gears, and the switch of the heater is controlled by disconnecting and attracting the front-end relay; while the integrated control type mainly controls the heater through the controller that comes with the heater. The difference between the two is that the gear type is lower in price, but is not conducive to the energy saving and endurance of the whole vehicle, while the price of the integrated type is relatively high. Therefore, how to reduce the overall cost and benefit the energy saving and endurance of the whole vehicle has become a technical problem that needs to be solved urgently. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a high-voltage air-heating PTC heater structure which can not only reduce the overall cost but also perform PWM control on the heater, thereby facilitating energy saving and endurance of the whole vehicle.

[0004] In order to solve the above technical problems, the high-voltage air-heating PTC heater structure of the utility model includes a PTC heater body composed of an upper base, a lower base and a PTC heating core assembly arranged in the upper base and the lower base. The head of the PTC heater body also has a layered upper busbar and a lower busbar, and an electrical gap is formed between the upper busbar and the lower busbar. The upper busbar and the lower busbar respectively have lead-out wires connected to the external high-voltage end. The lead-out wires of the upper busbar and the lower busbar are led out and then connected to the external high-voltage end for electrical connection.

[0005] The head of the PTC heater body is provided with a potting cavity and the electrical side can be sealed by potting glue in the potting cavity.

[0006] The lower busbar is a positive electrode, and the upper busbar is a negative electrode.

[0007] The head of the PTC heater body is provided with a waterproof groove located at the periphery of the potting cavity.

[0008] The waterproof groove is arranged on the lower base, and the upper base has a protruding structure. After the upper base and the lower base are assembled, the protruding structure of the upper base extends into the waterproof groove of the lower base.

[0009] A plurality of drainage grooves for draining condensed water are arranged at the edge positions on both sides of the lower base.

[0010] The lower busbar leads out a positive wire as a lead-out wire, and the upper busbar leads out a negative wire as a lead-out wire. The positive wire led out of the lower busbar and the negative wire led out of the upper busbar are respectively connected to the high-voltage end of the compressor and can be connected through the compressor controller for electrical control.

[0011] The lower busbar leads out two positive wires as lead-out wires, and the upper busbar leads out two negative wires as lead-out wires. The two positive wires led out of the lower busbar and the two negative wires led out of the upper busbar are respectively connected to the high-voltage end of the vehicle.

[0012] The advantages of the utility model are:

[0013] (1) The controller part of the heater is cancelled, and the head confluence adopts a layered design. On the one hand, when two wires are used at the high-voltage input end, they can be directly connected to the high-voltage and control ends of the compressor after being led out, and controlled by the compressor controller. The integration of two in one can not only reduce the overall cost, but also perform PWM control on the heater, which is beneficial to the energy saving and endurance of the whole vehicle; on the other hand, the layered design of the confluence can also reserve gear-type divisions. When there is no need to perform PWM control on the heater, the switch of the heater is directly controlled by the vehicle relay.

[0014] (2) The potting cavity and waterproof groove are used, and the edges of both sides of the lower base are also equipped with drainage grooves, which can not only meet the IP67&IP6K9K performance requirements of the heater, but also isolate the condensed water on the heat sink through the waterproof groove to prevent the condensed water from flowing into the dry area of ​​the air conditioner box and causing adverse effects on users.

[0015] (3) After installing the heating core assembly into the lower base, fill the potting cavity with two-component potting glue to ensure that the electrical side of the heater is fully immersed in the potting glue to ensure the IP67 & IP6K9K performance requirements of the heater.

[0016] (4) After the upper base and the lower base are assembled, the raised structure of the upper base extends into the waterproof groove of the lower base, ensuring that the condensed water on the heat dissipation fins cannot flow into the dry area of ​​the air conditioning box through the gap between the upper and lower bases.

[0017] (5) The drainage grooves on both sides of the lower base can be used to drain the condensed water generated by the product, preventing the condensed water from flowing into the cab and causing adverse effects on users. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the high-voltage air-heating PTC heater structure of the utility model;

[0019] Figure 2This is a schematic diagram of the structure of the high-voltage air-heating PTC heater of the utility model without the upper base;

[0020] Figure 3 This is a schematic diagram of the structure of the head portion of the high-voltage air-heating PTC heater structure of the utility model. DETAILED DESCRIPTION

[0021] The high-voltage air-heating PTC heater structure of the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Example

[0022] As shown in the figure, the high-pressure air-heating PTC heater structure of the utility model comprises a PTC heater body composed of an upper base 1, a lower base 2 and a PTC heating core assembly 3 arranged in the upper base and the lower base. The head of the PTC heater body is provided with a potting cavity 4. Figure 3 As shown, after installing the heating core assembly into the lower base, fill the potting cavity with two-component potting glue to ensure that the electrical side of the heater is fully immersed in the potting glue to ensure the IP67 & IP6K9K performance requirements of the heater;

[0023] The head of the PTC heater body also has an upper busbar 5 and a lower busbar 6 which are arranged in layers. The lower busbar 6 is the positive electrode of the heater, and the upper busbar 5 is the negative electrode of the heater. An electrical gap is formed between the upper busbar 5 and the lower busbar 6. It is necessary to ensure that the electrical gap between the positive and negative electrodes is sufficient. The upper busbar 5 and the lower busbar 6 respectively have lead-out wires connected to the external high-voltage end. In this embodiment, the lower busbar 6 leads out a positive wire as a lead-out wire, and the upper busbar 5 leads out a negative wire as a lead-out wire. The positive wire led out of the lower busbar 6 and the negative wire led out of the upper busbar 5 are respectively connected to the high-voltage end of the compressor and can be connected through the controller of the compressor for electrical control, that is, when integrated with the compressor in a two-in-one manner, the lower busbar leads out a positive wire, and the upper busbar leads out a negative wire, which are connected to the high voltage of the compressor and controlled by the controller of the compressor.

[0024] Furthermore, the head of the PTC heater body is provided with a waterproof groove 7 located at the periphery of the potting cavity, and the inside of the waterproof groove is coated with sealing glue. As can be seen from the figure, the waterproof groove 7 is opened on the lower base, and the upper base 1 has a protruding structure. After the upper base 1 and the lower base 2 are assembled, the protruding structure of the upper base extends into the waterproof groove of the lower base. Of course, the lower base is also provided with a corresponding sealing ring. Through the above-mentioned structural design, it is ensured that the condensed water on the heat dissipating fins cannot flow into the dry area of ​​the air-conditioning box through the gap between the upper and lower bases.

[0025] Furthermore, eight drainage grooves 8 for discharging condensed water generated by the product are arranged at the edge positions on both sides of the lower base 2 to prevent the condensed water from flowing into the cab and causing adverse effects on the user. Example

[0026] The high-voltage air-heating PTC heater structure in this embodiment is substantially the same as that in the first embodiment, except that the lower busbar 6 leads out two positive lines as lead-out lines, and the upper busbar 5 leads out two negative lines as lead-out lines. The two positive lines led out of the lower busbar 6 and the two negative lines led out of the upper busbar 5 are respectively connected to the high-voltage end of the vehicle, that is, when the relay is controlled, the lower busbar leads out two positive lines, and the upper busbar leads out two gear pole (negative) lines according to the requirements of grading and grouping, which are connected to the high voltage of the entire vehicle.

[0027] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A high-pressure air-heating PTC heater structure, comprising a PTC heater body consisting of an upper base (1), a lower base (2), and a PTC heating core assembly (3) disposed in the upper base and the lower base, characterized in that: The head of the PTC heater body also has an upper busbar (5) and a lower busbar (6) arranged in layers, the upper busbar (5) and the lower busbar (6) forming an electrical gap, the upper busbar (5) and the lower busbar (6) respectively having lead-out wires connected to an external high-voltage end, and the lead-out wires of the upper busbar (5) and the lower busbar (6) are connected to the external high-voltage end after being led out to be electrically connected.

2. The high-voltage air-heating PTC heater structure according to claim 1 is characterized in that: The head of the PTC heater body is provided with a potting cavity (4), and the electrical side can be sealed by potting glue in the potting cavity (4).

3. The high-voltage air-heating PTC heater structure according to claim 1 or 2, characterized in that: The lower busbar (6) is a positive electrode, and the upper busbar (5) is a negative electrode.

4. The high-voltage air-heating PTC heater structure according to claim 3 is characterized in that: The head of the PTC heater body is provided with a waterproof groove (7) located at the periphery of the potting cavity.

5. The high-voltage air-heating PTC heater structure according to claim 4 is characterized in that: The waterproof groove (7) is formed on the lower base, the upper base (1) has a protruding structure, and after the upper base (1) and the lower base (2) are assembled, the protruding structure of the upper base extends into the waterproof groove of the lower base.

6. The high-voltage air-heating PTC heater structure according to claim 5 is characterized in that: A plurality of drainage grooves (8) for draining condensed water are arranged at the edge positions on both sides of the lower base (2).

7. The high-voltage air-heating PTC heater structure according to claim 1, 2, 4, 5 or 6, characterized in that: The lower busbar (6) leads out a positive line as a lead-out line, and the upper busbar (5) leads out a negative line as a lead-out line. The positive line led out of the lower busbar (6) and the negative line led out of the upper busbar (5) are respectively connected to the high-voltage end of the compressor and can be connected through a controller of the compressor for electrical control.

8. The high-voltage air-heating PTC heater structure according to claim 1, 2, 4, 5 or 6, characterized in that: The lower busbar (6) leads out two positive lines as lead-out lines, and the upper busbar (5) leads out two negative lines as lead-out lines. The two positive lines led out of the lower busbar (6) and the two negative lines led out of the upper busbar (5) are respectively connected to the high-voltage end of the vehicle.

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