PTC (Positive Temperature Coefficient) mounting structure for new energy automobile air conditioner

Abstract

The utility model discloses a PTC (Positive Temperature Coefficient) mounting structure for a new energy automobile air conditioner, which belongs to the technical field of automobile air conditioners and comprises a left shell, a right shell, a PTC heater, a lower shell, a cover plate and the like. The left shell and the right shell are matched to form an air conditioner box body, the PTC heater is arranged in the box body, and the bottom of the PTC heater is matched with the lower shell through a positioning pin and fixed through screws. The cover plate is arranged on the side face of the left shell, sealed through a rib groove structure and connected through screws. According to the structure, accurate positioning, stable fixing and reliable sealing of the PTC are achieved through modular design, the PTC is supported to be rapidly disassembled under the condition that an air conditioner assembly and an instrument desk are not disassembled, the structure is more suitable for maintenance and replacement, and the assembling efficiency and maintenance convenience are improved. According to the utility model, the connection structure between the PTC heater and the air conditioner box body is optimized into a modular structure consisting of the left shell, the right shell, the lower shell, the cover plate, the positioning pin and the like, so that the number of parts is effectively reduced, and the assembly process is simplified.

Description

Technical Field

[0001] This utility model relates to the field of automotive air conditioning PTC heater installation technology, specifically a PTC installation structure for air conditioning in new energy vehicles. Background Technology

[0002] With the rapid development of new energy vehicles, their air conditioning systems are gradually evolving from traditional engine waste heat heating to integrated air heating systems or heat pump systems for auxiliary heating. PTC (Positive Temperature Coefficient) heaters, due to their advantages such as high heating efficiency, good safety, and fast response speed, have been widely used in the air conditioning heating or auxiliary heating of new energy vehicles.

[0003] In existing technologies, PTC heaters are typically installed inside the air conditioning unit to provide auxiliary heating of the air. However, the space under the dashboard of new energy vehicles is usually quite compact. To meet the requirements of vehicle lightweighting and structural integration, the installation method between the PTC heater and the air conditioning unit must consider the following aspects: structural compactness; sealing reliability; maintenance accessibility; and ensure that the PTC heater module can be easily positioned, fixed, and assembled consistently during the final assembly process at the factory.

[0004] However, existing PTC heater mounting structures generally have the following technical problems:

[0005] 1. The sealing method relies on foam or rubber strips, resulting in poor sealing stability and susceptibility to aging and loosening due to thermal expansion and contraction or prolonged compression; 2. The assembly position relies on manual adjustment and positioning, lacking effective guiding or limiting structures, leading to poor consistency and long working hours; 3. Most PTC heaters are installed in the middle or back of the air conditioning unit, requiring the disassembly of the dashboard, air conditioning unit assembly, etc., during maintenance; in addition, the complex structure and numerous parts increase the assembly difficulty and system weight.

[0006] In summary, the existing PTC heater installation structure for new energy vehicle air conditioning still has shortcomings such as complex installation, poor sealing, and inconvenient maintenance. There is an urgent need for a new type of PTC heater installation structure that combines simplified structure, reliable positioning, convenient disassembly and assembly, and effective sealing to meet the increasing demands of new energy vehicles for space utilization and ease of maintenance. Utility Model Content

[0007] The technical problem to be solved by this utility model is to overcome the existing defects and provide a PTC installation structure for air conditioning in new energy vehicles. The connection structure between the PTC heater and the air conditioning unit is optimized into a modular structure composed of a left shell, a right shell, a lower shell, a cover plate, and positioning pins, which effectively reduces the number of parts and simplifies the assembly process. The lower shell and the PTC heater are fitted with multi-point positioning pins to ensure accurate installation position, avoid manual correction, improve the consistency of final assembly and assembly efficiency, and effectively solve the problems in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution: A PTC mounting structure for air conditioning in new energy vehicles, comprising a right housing, a left housing, and a PTC heater. The left housing and the right housing cooperate to form an air conditioning unit, and the two are fixed together by screws. The air conditioning unit mainly consists of two housings, which facilitates assembly and reduces the number of parts. The PTC heater is installed in the air conditioning unit, and a lower housing is provided below the PTC heater. The lower housing not only protects the PTC heater but also seals the air conditioning unit. An end positioning pin is provided at the rear end of the lower housing, which corresponds to a hole on the PTC heater housing. A screw hole is provided on one side of the end positioning pin, and the screw hole is fixed to the PTC heater by two self-tapping screws. The end positioning pin is used to position the PTC heater. A cover plate is provided on the side of the left housing, and a sealing rib is provided on the cover plate. A sealing groove is provided on the side of the left housing. The sealing rib and the sealing groove form a rib-groove sealing structure, and the cover plate is fixed to the left housing by one self-tapping screw. This structure further increases the structural strength of the air conditioning unit, ensures that the PTC heater is firmly fixed, and facilitates disassembly.

[0009] Furthermore, a tail locating pin is provided at the rear of the lower housing. The lower housing is positioned by the tail locating pin during installation to ensure the correct installation position.

[0010] Furthermore, sealing and heat dissipation ribs are provided on the corresponding surfaces of the cover plate and the PTC heater. An arc-shaped limiting block is provided at one end of the cover plate. Two arc-shaped limiting blocks are provided, and the limiting groove formed between the arc-shaped limiting blocks is locked onto the PTC heater. This structure further enhances the structural strength of the PTC heater, making it more stable and reliable. Flange screw holes are provided around the cover plate. One self-tapping screw passes through the flange screw holes and is fixedly connected to the air conditioning unit and the lower housing. During disassembly, only the self-tapping screw on the cover plate and the screw on the lower housing need to be removed. Move it downwards a certain distance to release the positioning pin of the lower housing, and then move it to remove the PTC heater. This ensures sealing performance and reliable installation and fixation. It also allows the PTC heater to be disassembled independently without removing the entire vehicle's instrument air duct and air conditioning unit assembly, thereby reducing after-sales maintenance costs.

[0011] Furthermore, at least two sealing heat dissipation ribs are provided on the upper part of the cover plate, and they are arranged at equal intervals. These sealing heat dissipation ribs are not only used to maintain the gap between the cover plate and the PTC heater for heat dissipation, but also to strengthen the structural strength of the cover plate, thereby improving the structural strength and the support stability of the PTC heater.

[0012] Furthermore, four of each of the self-tapping screws (one and two) are provided; alternatively, the number can be adjusted according to the specific circumstances.

[0013] When assembling the air conditioning unit, after assembling the left and right housings into a complete assembly, install the cover plate onto the left housing and tighten the four self-tapping screws (first). Then install the PTC heater, using the two locating pins on the lower housing for positioning, and tighten the four self-tapping screws (second). When disassembling, remove the four self-tapping screws (first) and the four self-tapping screws (second) respectively, move the PTC heater down, and then move it to the left to detach it from the air conditioning unit.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This utility model optimizes the connection structure between the PTC heater and the air conditioning unit into a modular structure consisting of a left shell, a right shell, a lower shell, a cover plate, and positioning pins, effectively reducing the number of parts and simplifying the assembly process. The lower shell and the PTC heater are fitted with multi-point positioning pins to ensure accurate installation position, avoid manual correction, improve overall assembly consistency and efficiency, and are suitable for mass production needs.

[0016] 2. The use of a grooved sealing structure instead of traditional foam sealing effectively improves the airtightness and anti-aging performance of the interface area. At the same time, the composite fixing through multi-point screws enhances the structural strength and vibration resistance of the entire installation system. The sealing heat dissipation ribs set on the PTC heater cover not only help with heat conduction, but also further enhance the rigidity of the cover, improving the operational stability and service life of the entire system.

[0017] 3. This structure allows for the complete disassembly of the PTC heater module without removing the entire vehicle dashboard and air conditioning assembly, simply by removing the fixing screws. The disassembly process is simple and does not rely on special tooling, which can significantly reduce after-sales maintenance time and labor costs, improve user convenience and service efficiency, and has good economic and social application value. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the cover plate structure of this utility model;

[0020] Figure 3This is a schematic diagram of the lower shell structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the exploded structure of the self-tapping screw of this utility model.

[0022] In the diagram: 1 Right housing, 2 Left housing, 3 Cover plate, 4 Lower housing, 5 PTC heater, 6 Self-tapping screw one, 7 Self-tapping screw two, 8 Sealing rib, 9 Flange screw hole, 10 End locating pin, 11 Screw hole, 12 Tail locating pin, 13 Arc-shaped limit block, 14 Sealing heat dissipation rib, 15 Sealing groove. Detailed Implementation

[0023] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Example 1

[0024] Please see Figure 1-4 This utility model provides a technical solution: a PTC installation structure for air conditioning in new energy vehicles, including a right shell 1, a left shell 2, a cover plate 3, a lower shell 4, a PTC heater 5, a self-tapping screw 1 6, a self-tapping screw 2 7, a sealing rib 8, a flange screw hole 9, an end positioning pin 10, a screw hole 11, a tail positioning pin 12, an arc-shaped limiting block 13, a sealing heat dissipation rib 14, and a sealing groove 15.

[0025] In this embodiment: the air conditioner housing structure; the left housing 2 and the right housing 1 cooperate to form the main air conditioner housing, and the two are connected by multiple screws to achieve structural fixation; the PTC heater 5 is set at a predetermined position inside the air conditioner housing to heat the passing air.

[0026] The PTC heater has a bottom support and positioning structure; a lower housing 4 is provided below the PTC heater 5, and an end positioning pin 10 is provided at its rear end. The end positioning pin 10 is inserted into the positioning hole on the PTC heater housing to achieve accurate alignment; a screw hole 11 is also provided on one side of the lower housing 4, and the PTC heater 5 is fixed to the lower housing 4 by self-tapping screws 7.

[0027] The PTC heater side sealing and disassembly structure: A cover plate 3 is provided on the outside of the left housing 2. The cover plate 3 has longitudinally distributed sealing ribs 8, which are inserted into the sealing grooves 15 on the left housing 2 to form a rib groove sealing structure. Flange screw holes 9 are provided around the cover plate 3. Self-tapping screws 6 pass through the screw holes and are connected to the left housing 2 to complete the external sealing of the PTC heater and provide additional support.

[0028] The cover plate 3 has a reinforced structure; multiple sealing and heat dissipation ribs 14 are provided on the inner side of the cover plate corresponding to the PTC heater. These sealing and heat dissipation ribs are used to form a heat dissipation gap with the PTC heater and to enhance the overall rigidity of the cover plate in terms of structure. Two arc-shaped limiting blocks 13 are provided at one end of the cover plate. The limiting blocks form a limiting groove, which can be locked into the corresponding structural position on the PTC heater housing to effectively prevent the PTC heater from undergoing lateral or vertical displacement during use.

[0029] Positioning auxiliary structure; the tail of the lower housing 4 is provided with a tail positioning pin 12, which can be used with other structures of the air conditioning unit to further ensure accurate and consistent installation position.

[0030] Assembly and disassembly process: In the actual assembly process, the left housing 2 and the right housing 1 are first assembled into an air conditioning assembly; then the cover plate 3 is assembled to the outside of the left housing 2 and fixed with 4 self-tapping screws 6; then the PTC heater 5 is inserted into the lower housing 4 and positioned by the two end positioning pins 10, and then fixed with 4 self-tapping screws 7; the whole process has a clear structure and is simple to operate.

[0031] During disassembly, only the four self-tapping screws 6 on the cover plate 3 and the four self-tapping screws 7 at the bottom of the PTC heater need to be removed. Then, the PTC heater 5 can be disengaged from the positioning pin from below and pulled out laterally to the left to complete the overall disassembly. This method does not require disassembling the instrument air duct and air conditioning assembly, which significantly improves the convenience and efficiency of maintenance.

[0032] In this embodiment, four self-tapping screws are used for each of the first 6 and the second 7. However, in actual applications, the number of self-tapping screws can be adjusted according to the PTC heater model, the air conditioning unit structure, and the requirements of the usage environment.

[0033] In summary, this implementation not only achieves a high-strength, sealable, and detachable assembly structure between the PTC heater 5 and the air conditioning unit, but also improves the product's ease of maintenance and adaptability through structural optimization, demonstrating promising prospects for industrial applications.

[0034] The PTC heater installation method described in this utility model is applicable to air conditioning systems of new energy vehicles, and includes the following steps: First, the left housing 2 and the right housing 1 are assembled together and fixed by screws to form the main body of the air conditioning unit; Second, the cover plate 3 is aligned with the PTC heater installation opening on the left housing 2, so that the sealing rib 8 on the cover plate 3 is inserted into the sealing groove 15 on the left housing 2 to form a rib groove sealing structure, and the cover plate 3 is fixed by four self-tapping screws 6 through the flange screw holes 9; Next, the PTC heater 5 is inserted from the bottom of the air conditioning unit, so that the mounting hole on the housing of the PTC heater 5 is precisely aligned with the end positioning pin 10 at the rear end of the lower housing 4 to complete the initial limiting positioning; Finally, four self-tapping screws 7 are installed through the screw holes 11 to firmly fix the PTC heater 5 on the lower housing 4, completing the installation; This installation process has a clear structure and precise fit, and is suitable for standardized batch assembly in factories.

[0035] When it is necessary to replace or repair the PTC heater 5, it can be quickly disassembled by following these steps: First, remove the four self-tapping screws 6 on the cover plate 3 to release its fixed connection with the left housing 2; then, remove the four connection points at the bottom of the PTC heater 5 that are fixed to the lower housing 4 by the self-tapping screws 7; subsequently, the operator moves the PTC heater 5 vertically downwards to completely release it from the constraint of the end positioning pin 10 and the tail positioning pin 12 on the lower housing 4; finally, move the PTC heater 5 horizontally to the left to completely pull it out from the mounting opening on the side of the left housing 2. The entire disassembly process does not require the removal of the dashboard, air duct, or air conditioning assembly, making it simple to operate and quick to complete. It is particularly suitable for new energy vehicle structural platforms with limited space, significantly improving maintenance efficiency and after-sales convenience.

[0036] The foregoing has shown and described the basic principles, main features and advantages of this utility model. Various changes and modifications may be made to this utility model without departing from the spirit and scope thereof, and all such changes and modifications fall within the scope of this utility model as claimed.

Claims

1. A PTC mounting structure for air conditioning in new energy vehicles, comprising a right housing (1), a left housing (2), and a PTC heater (5), characterized in that: The left housing (2) and the right housing (1) are fitted together to form an air conditioning unit, and the two are fixed together by screws. The PTC heater (5) is installed in the air conditioning unit. The lower housing (4) is installed below the PTC heater (5). The rear end of the lower housing (4) is provided with an end positioning pin (10). The end positioning pin (10) corresponds to the hole on the housing of the PTC heater (5). The end positioning pin (10) is provided with a screw hole (11) on one side. The screw hole (11) is fixed to the PTC heater (5) by a second self-tapping screw (7). The side of the left housing (2) is provided with a cover plate (3). The cover plate (3) is provided with a sealing rib (8). The side of the left housing (2) is provided with a sealing groove (15). The sealing rib (8) and the sealing groove (15) form a rib groove sealing structure. The cover plate (3) is fixed to the left housing (2) by a first self-tapping screw (6).

2. The PTC mounting structure for air conditioning in new energy vehicles according to claim 1, characterized in that: The lower housing (4) is provided with a tail positioning pin (12).

3. The PTC mounting structure for air conditioning in new energy vehicles according to claim 1, characterized in that: Sealing heat dissipation ribs (14) are provided on the corresponding surfaces of the cover plate (3) and the PTC heater (5). An arc-shaped limiting block (13) is provided at one end of the cover plate (3). Two arc-shaped limiting blocks (13) are provided. The limiting groove formed between the arc-shaped limiting blocks (13) is stuck on the PTC heater (5). Flange screw holes (9) are provided around the cover plate (3). A self-tapping screw (6) passes through the flange screw hole (9) and is fixedly connected to the air conditioning unit and the lower housing (4).

4. The PTC mounting structure for air conditioning in new energy vehicles according to claim 1, characterized in that: At least two sealing heat dissipation ribs (14) are provided on the upper end of the cover plate (3) and are arranged at equal intervals.

5. The PTC mounting structure for air conditioning in new energy vehicles according to claim 1, characterized in that: Four of each of the self-tapping screws (6) and (7) are provided.

Images