End face waterproof sealing structure of air conditioner pipeline

Abstract

The utility model provides an end face waterproof sealing structure of an air conditioner pipeline, and belongs to the technical field of automobile pipeline systems. The outer side of the flange with the pipeline connector is fixedly sleeved with the pressing plate, meanwhile, the pressing plate is provided with the installation holes, meanwhile, the side, away from the pipeline connector, of the outer side of the flange is further sleeved with the closed-hole sponge, and one side of the closed-hole sponge is tightly attached to the pressing plate. The closed-hole sponge is provided with the receding holes corresponding to the mounting holes, so that the closed-hole sponge can be connected with a metal plate of a forecabin through threaded fasteners after penetrating through the mounting holes and the receding holes during mounting, the flange abuts against the metal plate, the mounting area of the flange is expanded through the pressing plate, the mounting stability is improved, and the service life of the flange is prolonged. And the hole-closing sponge is extruded by the pressing plate, so that the hole-closing sponge is deformed and then fills the gap between the pressing plate and the metal plate, the sealing requirement is met, the good damping effect can be achieved, the sealing structure better adapts to the using environment where vibration can be generated in the automobile running process, and the waterproof sealing effect of the end is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile pipeline systems, in particular to an end surface waterproof sealing structure of an air-conditioning pipeline. Background Art

[0002] The core structure of a car's heat pump air-conditioning system is an air source heat pump, which absorbs heat from the air and uses a small amount of electricity to drive the heat pump to transport the absorbed heat through pipes to the car for heat exchange, thereby achieving temperature regulation inside the car.

[0003] At present, the existing automotive heat pump air-conditioning systems on the market usually use water as a medium for heat conduction, which mainly involves heat exchange between water and air. Normally, in order to ensure the comfort of the rear seats, existing MPV models will usually have air-conditioning ducts behind the chassis. At this time, the air-conditioning ducts behind the chassis are usually fixed to the sheet metal of the front cabin of the car with bolts. However, in actual use, if the use environment is humid or rainy, which means there is a lot of water, water will penetrate into the front cabin through the connection between the duct and the sheet metal of the front cabin, causing water to enter the front cabin, interfering with the normal use of some electrical components in the front cabin, and even causing failure problems. Therefore, improving the waterproof sealing performance of the connection between the air-conditioning duct behind the chassis and the sheet metal is the key to maintaining the normal operation of the automotive heat pump air-conditioning system. At present, the sealing structure used for end face connection on the market is usually such as the pipe joint and heat pump system disclosed in patent CN208185693U, which includes a first joint, a second joint, a seal and a fastener. The first joint is provided with a groove for accommodating the seal, the second joint is provided with a protrusion for pressing the seal, and the first joint and the second joint are assembled and fixed by fasteners, the protrusion and at least part of the seal are accommodated in the groove, the second joint has a third end face and a fourth end face relative to each other, the third end face is provided with a protrusion protruding along the axial direction, the protrusion presses the seal, during installation, the first joint and the second structure are connected and locked by the fastener, and the seal is pressed into the groove of the first joint by the protrusion, so as to achieve the sealing between the first joint and the second joint. Although the above joint structure can meet the requirements of pipe end face connection, the sealing area is limited to the connection between the protrusion and the seal, which is small. In addition, there is a vibration problem in the operation structure of the automobile, which can easily cause the problem of poor sealing between the protrusion and the seal, affecting the sealing reliability. Summary of the invention

[0004] In view of the above-mentioned problems existing in the prior art, the present invention aims to provide an end face waterproof sealing structure for an air-conditioning pipeline, wherein a pressure plate is provided on the outer fixed sleeve of a flange with a pipeline joint, and at the same time, a mounting hole is opened on the pressure plate, and the mounting contact area of ​​the flange is expanded by the pressure plate. In addition, a closed-cell sponge is provided on the pressure plate, and the pressure plate is covered with the closed-cell sponge, so that when the flange is pressed on the sheet metal of the front cabin through the pressure plate, the closed-cell sponge can be used as a sealing structure between the pressure plate and the sheet metal, which can not only achieve sealing but also has good flexibility, and forms a shock-absorbing structure between the pressure plate and the sheet metal, which can not only provide a sufficiently large sealing area, but also can adapt to the use environment of automobile operation vibration, to ensure more reliable sealing.

[0005] The specific technical solutions are as follows:

[0006] An end face waterproof sealing structure of an air conditioning pipeline has the following characteristics, including:

[0007] A flange, on which a number of pipe joints are arranged;

[0008] The pressing plate is an annular structure, the pressing plate is sleeved outside the flange and fixedly connected to the flange, the outer wall of the flange is sealed and connected to the inner wall of the pressing plate, and a plurality of mounting holes are opened on the pressing plate;

[0009] The closed-cell sponge is an annular structure. The closed-cell sponge is also sleeved outside the flange. One side of the closed-cell sponge is in contact with the pressure plate. At the same time, a number of through avoidance holes are opened on the closed-cell sponge, and the avoidance holes correspond to the installation holes one by one.

[0010] The above-mentioned end face waterproof sealing structure of an air-conditioning pipeline also includes a positioning pin, which is arranged in a cylindrical shape, one end of the positioning pin is fixed to the pressure plate, and a positioning pin is coaxially sleeved outside each mounting hole.

[0011] In the above-mentioned end face waterproof sealing structure of an air-conditioning pipeline, the length of the positioning pin is less than the thickness of the closed-cell sponge.

[0012] In the above-mentioned end face waterproof sealing structure of an air-conditioning pipeline, the positioning pin and the pressure plate are connected by welding.

[0013] In the above-mentioned end face waterproof sealing structure of an air-conditioning pipeline, the inner wall of the pressure plate and the outer wall of the flange are connected by welding.

[0014] In the above-mentioned end face waterproof sealing structure of an air-conditioning pipeline, adhesive is provided between the closed-cell sponge and the pressing plate.

[0015] In the above-mentioned end face waterproof sealing structure of an air-conditioning pipeline, an inner concave avoidance groove is provided on the outer side wall of the flange to form a step on the outer side wall of the flange, and the pressure plate is sleeved in the avoidance groove with one side resting on the step.

[0016] In the above-mentioned end face waterproof sealing structure of an air-conditioning pipeline, the avoidance groove is arranged on a side of the flange close to the pipeline joint.

[0017] In the above-mentioned end face waterproof sealing structure of an air-conditioning pipeline, a gap is provided between the inner wall of the closed-cell sponge and the outer wall of the flange, and at the same time, a gap is provided between the inner wall of the avoidance hole and the outer wall of the positioning pin.

[0018] The above-mentioned end face waterproof sealing structure of an air-conditioning pipeline, wherein the aperture of the mounting hole is greater than or equal to the outer diameter of the positioning pin, one end of the positioning pin is inserted into the mounting hole, and at the same time, a first welding slope angle is provided at the edge of the mounting hole at one end away from the closed-cell sponge, and a second welding slope angle is provided at the outer edge of the end of the positioning pin inserted into the mounting hole.

[0019] The positive effects of the above technical solution are:

[0020] The above-mentioned end face waterproof sealing structure of the air-conditioning pipeline is achieved by providing a pressure plate on the outer fixed sleeve of the flange with a plurality of pipeline joints, and the pressure plate is provided with mounting holes. The flange is pressed tightly against the sheet metal of the front cabin through the pressure plate with the mounting holes, thereby expanding the installation area between the flange and the sheet metal and improving the installation stability. In addition, a closed-cell sponge is provided on the pressure plate, and the gap between the pressure plate and the sheet metal is filled with the closed-cell sponge, which not only achieves sealing but also provides better flexibility, adapts to the use environment where vibration will be generated during the driving of the car, ensures the waterproof sealing effect, and maintains the normal use of the air-conditioning pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural diagram of an embodiment of an end surface waterproof sealing structure of an air conditioning pipeline of the utility model;

[0022] Figure 2 This is a structural diagram of a pressing plate in a preferred embodiment of the utility model;

[0023] Figure 3 This is a structural diagram of a closed-cell sponge in a preferred embodiment of the utility model;

[0024] Figure 4 This is a structural diagram of a preferred embodiment of the utility model without the closed-cell sponge and with positioning pins;

[0025] Figure 5 This is a structural diagram of a flange in a preferred embodiment of the utility model;

[0026] Figure 6 This is a cross-sectional view of the connection between the positioning pin and the pressure plate of a preferred embodiment of the utility model.

[0027] In the attached drawings: 1. flange; 11. pipe joint; 12. avoidance groove; 13. step; 2. pressure plate; 21. mounting hole; 211. first welding slope angle; 3. closed-cell sponge; 31. avoidance hole; 4. positioning pin; 41. second welding slope angle. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the following embodiments are combined with the attached Figure 1 To Attachment Figure 6 The technical solution provided by the utility model is described in detail, but the following content is not intended to limit the utility model.

[0029] Figure 1 This is a structural diagram of an embodiment of an end surface waterproof sealing structure of an air conditioning pipeline of the utility model; Figure 2 This is a structural diagram of a pressing plate in a preferred embodiment of the utility model; Figure 3 This is a structural diagram of a closed-cell sponge in a preferred embodiment of the utility model. Figure 1 , Figure 2 as well as Figure 3 As shown, the end face waterproof sealing structure of the air conditioning pipeline provided in this embodiment includes: a flange 1, a pressure plate 2, a closed-cell sponge 3, and a positioning pin 4 can also be additionally provided.

[0030] Specifically, the flange 1 is a block-shaped structure, and a plurality of pipe connectors 11 are arranged on one side of the flange 1, and each pipe connector 11 is fixed on the flange 1 and penetrates the flange 1 at the same time, providing conditions for the conduction of the pipeline. At this time, the side of the flange 1 away from the pipe connector 11 is abutting surface. During installation, the abutting surface of the flange 1 abuts against the sheet metal of the front cabin, realizing fixed installation, and also providing conditions for subsequent end face waterproof sealing.

[0031] Specifically, the pressing plate 2 is an annular structure, and the inner ring shape of the pressing plate 2 is consistent with the outer contour shape of the flange 1. When installing, the pressing plate 2 is sleeved outside the flange 1 and fixedly connected to the flange 1, so that the pressing plate 2 and the flange 1 are fixedly connected. The contact area of ​​the flange 1 is expanded by the pressing plate 2, which provides conditions for providing a larger sealing area in the future. In addition, the outer wall of the flange 1 is sealed with the inner wall of the pressing plate 2, so that the sealing between the flange 1 and the pressing plate 2 is achieved, and the problem of water leakage from the connection gap between the flange 1 and the pressing plate 2 is prevented, and the waterproof sealing effect of the end face is further ensured. At the same time, a number of mounting holes 21 are also opened on the pressing plate 2. Preferably, the mounting holes 21 are symmetrically arranged on the pressing plate 2, so that when the flange 1 is pressed on the sheet metal of the front cabin in the future, it can be achieved by passing the threaded fasteners through the mounting holes 21 and then connecting with the sheet metal, which is convenient for installation. At the same time, the pressing plate 2 can also be used as a force-bearing basis for the stable connection of the flange 1, ensuring the waterproof sealing effect of the subsequent end face.

[0032] Specifically, the closed-cell sponge 3 is set to an annular structure. At this time, the shape of the closed-cell sponge 3 is similar to that of the pressure plate 2, which provides conditions for the subsequent use of the closed-cell sponge 3 as a seal between the pressure plate 2 and the sheet metal. In addition, the closed-cell sponge 3 is also sleeved outside the flange 1. At the same time, one side of the closed-cell sponge 3 is fitted with the pressure plate 2, so that when the flange 1 is pressed against the sheet metal through the pressure plate 2, the gap between the pressure plate 2 and the sheet metal can be filled by squeezing the closed-cell sponge 3 to meet the end face sealing requirements. In addition, the closed-cell sponge 3 has good flexibility and good resilience, so that when sealing the pressure plate 2 and the sheet metal, it can better adapt to the use scenario where the car will vibrate during driving, effectively avoiding the problem of poor sealing due to vibration, and improving the end face sealing effect. At the same time, a plurality of through avoidance holes 31 are provided on the closed-cell sponge 3, and when one side of the closed-cell sponge 3 is attached to the pressing plate 2, the plurality of avoidance holes 31 on the closed-cell sponge 3 can correspond to the plurality of mounting holes 21 on the pressing plate 2 one by one, so that the threaded fastener can smoothly pass through the closed-cell sponge 3 when passing through the mounting holes 21, thereby ensuring that the threaded fastener can be smoothly connected to the sheet metal, and the installation is more convenient. It is worth pointing out that the closed-cell sponge 3 is an existing material and can be directly purchased and used, so its material composition is not repeated in this embodiment.

[0033] Figure 4 This is a structural diagram of a preferred embodiment of the utility model without the closed-cell sponge and with positioning pins. Figure 4 As shown, the pressing plate 2 is also equipped with a number of positioning pins 4. At this time, the positioning pins 4 are arranged in a cylindrical shape, so that the positioning pins 4 are hollow structures. At the same time, one end of the positioning pins 4 is fixed to the pressing plate 2, so that the positioning pins 4 are stably installed on the pressing plate 2. Preferably, each mounting hole 21 is coaxially sleeved with a positioning pin 4, that is, one positioning pin 4 corresponds to one mounting hole 21. When the subsequent threaded fasteners are installed through the mounting holes 21, the threaded fasteners can be directly inserted into the hollow of the corresponding positioning pins 4, ensuring the smooth installation of the threaded fasteners. In addition, the structural strength of the pressing plate 2 for installing the threaded fasteners is also strengthened, making the installation of the pressing plate 2 more stable and reliable.

[0034] More specifically, the length of the positioning pin 4 is set to be smaller than the thickness of the closed-cell sponge 3. Preferably, the length of the positioning pin 4 is greater than one-third of the thickness of the closed-cell sponge 3 and less than three-fifths of the thickness of the closed-cell sponge 3, so that when the closed-cell sponge 3 is compressed by pressing the pressure plate 2 against the sheet metal by tightening the threaded fasteners, the closed-cell sponge 3 can be compressed to achieve a waterproof seal on the end face. At the same time, the sheet metal can be supported by the positioning pin 4, so that the positioning pin 4 can serve as a supporting structure between the pressure plate 2 and the sheet metal, preventing the closed-cell sponge 3 from being over-compressed and causing sealing failure, and also maintaining the rebound ability of the closed-cell sponge 3, providing conditions for adapting to the use environment where vibrations will be generated during the operation of the car.

[0035] More specifically, each positioning pin 4 is welded to the pressure plate 2, which improves the structural strength of the positioning pin 4 installed on the pressure plate 2, thereby providing a structural basis for the positioning pin 4 to stably support the pressure plate 2 and the sheet metal to prevent the closed-cell sponge 3 from being over-compressed. In addition, the processing technology is mature and easy to operate.

[0036] More specifically, the inner wall of the pressure plate 2 and the outer wall of the flange 1 are also welded, which not only achieves a stable connection between the pressure plate 2 and the flange 1 with high connection strength, but also achieves sealing at the connection between the pressure plate 2 and the flange 1, further ensuring that water will not leak from the connection gap between the pressure plate 2 and the flange 1, and the structural design is more reasonable.

[0037] More specifically, glue is provided between the closed-cell sponge 3 and the pressing plate 2. Preferably, the glue is double-sided glue, that is, the closed-cell sponge 3 is adhered to the pressing plate 2 by the glue, thereby achieving temporary fixation of the closed-cell sponge 3 on the pressing plate 2, preventing the closed-cell sponge 3 from detaching from the pressing plate 2 during storage or installation, and facilitating disassembly and assembly.

[0038] Figure 5 This is a structural diagram of a flange of a preferred embodiment of the utility model. Figure 1 , Figure 2 as well as Figure 5 As shown, an inward-concave avoidance groove 12 is provided on the outer wall of the flange 1, and a step 13 is formed on the outer wall of the flange 1 through the inward-concave avoidance groove 12. In addition, when the pressure plate 2 is sleeved on the outside of the flange 1, the pressure plate 2 is sleeved in the avoidance groove 12, and one side of the pressure plate 2 abuts against the step 13, so that the step 13 formed by the avoidance groove 12 can provide a limit for the installation of the pressure plate 2 on the flange 1, thereby improving the efficiency of assembly between the pressure plate 2 and the flange 1.

[0039] More specifically, the avoidance groove 12 on the flange 1 is arranged on the side of the flange 1 close to the pipe joint 11, that is, when the flange 1 is pressed against the sheet metal, the avoidance groove 12 is located on the side of the flange 1 away from the sheet metal, that is, the step 13 can limit the movement of the pressure plate 2 toward the sheet metal side, so that when the flange 1 is subsequently pressed against the sheet metal by the pressure plate 2, the pressure plate 2 can be supported by the step 13, so that the pressure plate 2 can not only apply pressure to the flange 1 through the welding portion between it and the flange 1, but also apply pressure to the flange 1 through the step 13, thereby improving the stability of the clamping, preventing the problem of slipping during the clamping process, and the structural design is more reasonable.

[0040] More specifically, a gap is provided between the inner wall of the closed-cell sponge 3 and the outer wall of the flange 1, which avoids the problem of direct contact between the inner wall of the closed-cell sponge 3 and the outer wall of the flange 1, and provides deformation space for the deformation of the inner side of the closed-cell sponge 3. Similarly, a gap is provided between the inner wall of the avoidance hole 31 and the outer wall of the positioning pin 4, which avoids the problem of direct contact between the inner wall of the avoidance hole 31 on the closed-cell sponge 3 and the outer wall of the positioning pin 4, and provides deformation space for the deformation of the closed-cell sponge 3 at the avoidance hole 31, avoiding the problem of internal accumulation due to lack of deformation space when the closed-cell sponge 3 is deformed, and preventing the closed-cell sponge 3 from being compressed and offset or unevenly deformed due to internal accumulation, further improving the waterproof sealing effect of the end face.

[0041] Figure 6 This is a cross-sectional view of the connection between the positioning pin and the pressure plate of a preferred embodiment of the utility model. Figure 1 , Figure 4 as well as Figure 6 As shown, the diameter of the mounting hole 21 is set to be greater than or equal to the outer diameter of the locating pin 4. At this time, when the locating pin 4 is installed in the corresponding mounting hole 21 on the pressure plate 2, one end of the locating pin 4 will be inserted into the mounting hole 21, thereby realizing temporary positioning of the locating pin 4 on the pressure plate 2. The locating pin 4 and the pressure plate 2 are then welded together, which facilitates production and manufacturing. At the same time, a first welding slope angle 211 is provided at the edge of the end of the mounting hole 21 away from the closed-cell sponge 3, and a second welding slope angle 41 is provided at the outer edge of the end of the locating pin 4 inserted into the mounting hole 21, so that after one end of the locating pin 4 is inserted into the mounting hole 21, the first welding slope angle 211 and the second welding slope angle 41 can correspond to each other, thereby forming a welding groove, providing connectivity conditions for subsequently increasing the welding strength and improving the flatness of the welding surface. In addition, it also prevents the formation of a weld on the side of the pressure plate 2 that contacts the closed-cell sponge 3, ensures the absolute flatness of the side of the pressure plate 2 that abuts the closed-cell sponge 3, avoids the problem of uneven deformation of the closed-cell sponge 3 and affects the sealing effect, and the structural design is more reasonable.

[0042] As a preferred embodiment, the end of the locating pin 4 inserted into the mounting hole 21 is a stepped shaft, that is, a limiting structure is formed at the end of the locating pin 4 inserted into the mounting hole 21. At this time, the mounting hole 21 can be a straight hole or a stepped hole. When the mounting hole 21 is a straight hole, the limiting structure of the stepped shaft abuts against the pressure plate 2 and is on the surface beside the mounting hole 21. When the mounting hole 21 is a stepped hole, the mounting hole 21 and the stepped shaft are complementary in design, so that when the pressure plate 2 and the sheet metal are subsequently supported by the locating pin 4, the force of the locating pin 4 against the pressure plate 2 is not only borne by the welding structure between the locating pin 4 and the pressure plate 2, but also by the limiting structure formed on the locating pin 4, thereby further improving the installation reliability.

[0043] The end face waterproof sealing structure of the air conditioning pipeline provided in this embodiment includes a flange 1, a pressure plate 2 and a closed-cell sponge 3; a pressure plate 2 is fixedly sleeved on the outer side of the flange 1 with a pipeline joint 11, and a plurality of mounting holes 21 are opened on the pressure plate 2. At the same time, a closed-cell sponge 3 is sleeved on the outer side of the flange 1 and on the side away from the pipeline joint 11, and one side of the closed-cell sponge 3 is tightly attached to the pressure plate 2, and an avoidance hole 31 corresponding to the mounting hole 21 is opened on the closed-cell sponge 3, so that a threaded fastener can be passed through the mounting hole 21 during installation. After the installation hole 21 and the avoidance hole 31 are connected to the sheet metal of the front cabin, the flange 1 is pressed against the sheet metal, and the installation area of ​​the flange 1 is expanded by the pressure plate 2, which improves the installation stability. The closed-cell sponge 3 is squeezed by the pressure plate 2 to deform it and fill the gap between the pressure plate 2 and the sheet metal. It not only meets the sealing requirements, but also has good flexibility, good rebound ability, and good shock absorption effect. It is better adapted to the use environment where vibration will be generated during the driving of the car, avoids the problem of sealing failure due to vibration, and ensures the waterproof sealing effect of the end.

[0044] The above are only preferred embodiments of the present invention, and do not limit the implementation mode and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. An end face waterproof sealing structure of an air conditioning pipeline, characterized in that: include: A flange, wherein a plurality of pipe joints are arranged on the flange; A pressing plate, the pressing plate is an annular structure, the pressing plate is sleeved outside the flange and fixedly connected to the flange, the outer wall of the flange is sealed and connected to the inner wall of the pressing plate, and a plurality of mounting holes are opened on the pressing plate; A closed-cell sponge, the closed-cell sponge is an annular structure, the closed-cell sponge is also sleeved outside the flange, one side of the closed-cell sponge is in contact with the pressing plate, and at the same time, a plurality of through avoidance holes are opened on the closed-cell sponge, and the plurality of avoidance holes correspond to the plurality of mounting holes one by one; It also includes a positioning pin, which is arranged in a cylindrical shape, one end of which is fixed to the pressure plate, and a positioning pin is coaxially sleeved outside each of the mounting holes.

2. The end surface waterproof sealing structure of the air conditioning pipeline according to claim 1, characterized in that: The length of the positioning pin is less than the thickness of the closed-cell sponge.

3. The end surface waterproof sealing structure of the air conditioning pipeline according to claim 1, characterized in that: The positioning pin and the pressing plate are connected by welding.

4. The end surface waterproof sealing structure of the air conditioning pipeline according to claim 1, characterized in that: The inner wall of the pressing plate and the outer wall of the flange are connected by welding.

5. The end surface waterproof sealing structure of the air conditioning pipeline according to claim 1, characterized in that: Adhesive is arranged between the closed-cell sponge and the pressing plate.

6. The end surface waterproof sealing structure of the air conditioning pipeline according to claim 1, characterized in that: An inwardly concave avoidance groove is provided on the outer side wall of the flange to form a step on the outer side wall of the flange, and the pressure plate is sleeved in the avoidance groove with one side resting on the step.

7. The end surface waterproof sealing structure of the air conditioning pipeline according to claim 6, characterized in that: The avoidance groove is arranged on a side of the flange close to the pipe joint.

8. The end surface waterproof sealing structure of the air conditioning pipeline according to claim 1, characterized in that: A gap is arranged between the inner wall of the closed-cell sponge and the outer wall of the flange, and a gap is arranged between the inner wall of the avoidance hole and the outer wall of the positioning pin.

9. The end surface waterproof sealing structure of the air conditioning pipeline according to claim 1, characterized in that: The aperture of the mounting hole is greater than or equal to the outer diameter of the positioning pin, and one end of the positioning pin is inserted into the mounting hole. At the same time, a first welding slope angle is provided at the edge of the mounting hole away from the closed-cell sponge, and a second welding slope angle is provided at the outer edge of the end of the positioning pin inserted into the mounting hole.

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