Automobile air conditioning air duct structure

Abstract

The utility model relates to the technical field of automobile air conditioner provides an air pipe structure for automobile air conditioner, including main air pipe, the inside of main air pipe is provided with protection structure, both ends of main air pipe outside are all installed with connecting structure, the connecting structure includes the connecting block fixed in both ends of main air pipe outside, both ends of main air pipe are all installed with the connecting pipe, one side of connecting pipe is fixed with the connecting plate, one side of connecting plate is fixed with the sealing washer, the utility model discloses be provided with connecting structure, the sealing washer of connecting pipe one side when screwing the screw block, will be closely combined with main air pipe, effectively prevent the wind from the connecting part leakage, guarantee the normal operation efficiency of air conditioning system, and the engagement structure of plug rod and spacing groove, on the basis of threaded connection further fixed, prevent the threaded connection loose because of vibration during the automobile driving, ensure that the connection of air pipe and external pipeline is stable and reliable, avoid the occurrence of the phenomenon such as air leakage or falling.

Description

Technical Field

[0001] This utility model relates to the field of automotive air conditioning technology, and in particular to a duct structure for automotive air conditioning. Background Technology

[0002] Automotive air conditioning refers to a device system installed on a vehicle to regulate the temperature, humidity, cleanliness, and airflow distribution of the air inside the vehicle. An automotive air conditioning duct structure refers to a pipe assembly used to guide, distribute, and regulate the airflow of the automotive air conditioning system by delivering cooled / heated air from the air conditioning unit to the air outlets inside the vehicle.

[0003] To address this, patent CN208750192U discloses an easy-to-install noise-reducing duct for automotive air conditioning, comprising an air conditioning connector, a flexible hose, and an air outlet duct. The upper end of the air conditioning connector is connected to an air inlet duct, and mounting plates are distributed at both ends of the right side of the air inlet duct. The flexible hose is installed at the end of the air inlet duct, and clamping clamps are embedded at both ends of the outer wall of the flexible hose. Connectors are fixed to both sides of the ends of the clamping clamps, and a screw passes through the middle of the connector. The air outlet duct is located at the right end of the flexible hose. This easy-to-install noise-reducing duct for automotive air conditioning features an air inlet duct with a raised structure in the middle of its outer wall. The L-shaped air inlet duct can meet the complex wiring requirements inside the car, preventing difficulties in wiring during use. Simultaneously, the outer wall of the air inlet duct has protrusions that effectively accommodate pre-drilled holes in the car during duct installation, with the protrusions fitting snugly against the inner wall of the pre-drilled holes.

[0004] The aforementioned noise-reducing ducts for automotive air conditioning, which are easy to install, are connected using clamps, connectors, and screws. However, with prolonged use, the continuous vibrations during vehicle operation can cause the screws to loosen, posing a risk of the ducts falling off, and also resulting in low installation efficiency. Utility Model Content

[0005] The purpose of this utility model is to provide a duct structure for automotive air conditioning, in order to solve the defect that existing noise-reducing ducts for automotive air conditioning, which are easy to install, are not convenient for quick installation.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a duct structure for automotive air conditioning, including a main duct;

[0007] The main air duct is equipped with a protective structure inside;

[0008] Both ends of the main air duct are equipped with connecting structures. Each connecting structure includes connecting blocks fixed to both ends of the main air duct. Both ends of the main air duct are equipped with connecting pipes. A connecting plate is fixed to one side of each connecting pipe. A sealing gasket is fixed to one side of each connecting plate. A threaded block is fixed to one end of each connecting plate. A limit groove is provided on the outer side of each threaded block. Fixing seats are fixed to both sides of each connecting block. An internal cavity is provided inside each fixing seat. A movable rod is installed inside the internal cavity. A spring is installed on the outer side of each movable rod. A reset plate is fixed to the bottom end of the movable rod at one end of the spring. A plug is fixed to one side of the reset plate. A threaded groove is provided at one end of each connecting block. A moving block is fixed to one end of the movable rod on the outer side of the fixing seat.

[0009] Preferably, the protective structure includes an inner layer disposed within the inner layer of the main air duct, a sound-absorbing cotton disposed on the outer side of the inner layer, a heat insulation layer disposed on the outer side of the sound-absorbing cotton, an outer layer disposed on the outer side of the heat insulation layer, a first air guide plate fixed at one end of the main air duct, and a second air guide plate fixed at the other end of the main air duct.

[0010] Preferably, the inner layer is a polyethylene terephthalate film, the outer layer is made of polypropylene, the sound-absorbing cotton is made of polyester fiber cotton, and the heat insulation layer is made of polyurethane foam.

[0011] With the above structure, the inner layer can reduce the frictional resistance of air flowing inside the duct and improve the efficiency of air transmission. The outer layer has high mechanical strength and rigidity, which can resist the compression, collision or vibration of the external environment. The sound-absorbing cotton and heat insulation layer have the functions of sound insulation and heat insulation, which can effectively reduce the heat exchange between the inside and outside of the duct and enhance the noise reduction effect.

[0012] Preferably, the outer diameters of the first and second air guide plates are the same as the inner diameters of the main air duct, the interiors of the first and second air guide plates are both tapered, and the first and second air guide plates are symmetrically distributed inside the main air duct.

[0013] With the above structure, the cone-shaped arrangement inside the first and second air guide plates during use can guide the dispersed airflow entering the duct to the central area, making the airflow more concentrated and the transmission more efficient.

[0014] Preferably, the connecting blocks are symmetrically distributed at both ends on the outside of the main air duct, the outer diameter of the connecting plate is the same as the outer diameter of the connecting block, and the threaded block and the connecting block are connected by a threaded groove.

[0015] With the above structure, the threaded connection between the threaded block and the threaded groove can achieve a tight fit between the connecting pipe and the main air duct during use. During the tightening process, the sealing gasket can be gradually compressed, so that the sealing gasket fully fits the surface of the main air duct, enhancing the sealing of the connection part, preventing air conditioning air from leaking from the gaps, and ensuring the air supply efficiency of the air conditioning system.

[0016] Preferably, the fixed bases are symmetrically distributed on both sides of the connecting block, the movable rod and the reset plate form a telescopic structure through a spring, the limiting groove is arranged in a ring, and the insertion rod and the threaded block form a locking structure through the limiting groove.

[0017] With the above structure, the elastic potential energy of the spring can push the reset plate during use, so that the plug rod can automatically lock into the limiting groove. The spring can absorb the vibration energy of the car during driving, reduce the rigid impact between the plug rod and the limiting groove, and prevent the locking structure from loosening or wearing due to vibration. In addition, the annular limiting groove allows the plug rod to be locked in when the threaded block is tightened, without the need for precise alignment of a specific position, thus improving installation flexibility.

[0018] The advantages of the air duct structure for automotive air conditioning provided by this utility model are as follows:

[0019] By setting up a protective structure, and using polyester fiber cotton and polyurethane foam as the sound-absorbing cotton and heat insulation layer respectively, a composite sound and heat insulation barrier is formed, which can effectively reduce the heat exchange inside and outside the air duct and enhance the noise reduction effect. The symmetrical conical design of the first and second air guide plates can guide the airflow to concentrate towards the central area, reduce the eddy loss of airflow at the pipe wall, and improve the wind power transmission efficiency.

[0020] With the connection structure in place, the sealing gasket on one side of the connecting pipe will fit tightly against the main air duct when the threaded block is tightened, effectively preventing air leakage from the connection point and ensuring the normal operating efficiency of the air conditioning system. The locking structure between the plug and the limiting groove further fixes the connection on the basis of the threaded connection, preventing the threaded connection from loosening due to vibration during vehicle operation, ensuring a stable and reliable connection between the air duct and the external pipeline, and avoiding air leakage or detachment. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0022] Figure 2 This is a three-dimensional exploded structural diagram of the present invention;

[0023] Figure 3 This is a three-dimensional cross-sectional structural diagram of the present invention;

[0024] Figure 4 For the present utility model Figure 3 Enlarged structural diagram at point A in the middle;

[0025] Figure 5 This is a three-dimensional exploded structural diagram of the protective structure of this utility model.

[0026] The following are the annotations in the diagram: 1. Main air duct; 2. Protective structure; 201. Inner layer; 202. Sound-absorbing cotton; 203. Heat insulation layer; 204. Outer layer; 205. First air guide plate; 206. Second air guide plate; 3. Connecting structure; 301. Connecting block; 302. Connecting pipe; 303. Connecting plate; 304. Sealing gasket; 305. Threaded block; 306. Limiting groove; 307. Fixed seat; 308. Internal cavity; 309. Movable rod; 310. Spring; 311. Reset plate; 312. Insert rod; 313. Threaded groove; 314. Moving block. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figure 1-5 The present invention provides a duct structure for automotive air conditioning, including a main duct 1.

[0029] Reference Figure 2 , Figure 3 and Figure 5 As shown, a protective structure 2 is provided inside the main air duct 1. The protective structure 2 includes an inner layer 201 disposed inside the main air duct 1, a sound-absorbing cotton 202 disposed outside the inner layer 201, a heat insulation layer 203 disposed outside the sound-absorbing cotton 202, and an outer layer 204 disposed outside the heat insulation layer 203. A first air guide plate 205 is fixed at one end inside the main air duct 1, and a second air guide plate 206 is fixed at the other end inside the main air duct 1. The inner layer 201 is made of polyethylene terephthalate film, the outer layer 204 is made of polypropylene material, the sound-absorbing cotton 202 is made of polyester fiber cotton, and the heat insulation layer 203 is made of polyurethane foam. The outer diameters of the first air guide plate 205 and the second air guide plate 206 are the same as the inner diameters of the main air duct 1. The interiors of the first air guide plate 205 and the second air guide plate 206 are both conical. The first air guide plate 205 and the second air guide plate 206 are symmetrically distributed inside the main air duct 1.

[0030] The inner layer 201 is a polyethylene terephthalate film with a smooth surface, which reduces airflow resistance and ensures smooth airflow. The sound-absorbing cotton 202 and the heat insulation layer 203 are polyester fiber cotton and polyurethane foam, respectively, forming a composite sound and heat insulation barrier, reducing heat exchange between the inside and outside of the duct, and preventing energy loss due to ambient temperature during the transmission of cold / hot air. At the same time, the open-cell structure of polyurethane foam and the interwoven fiber structure of polyester fiber cotton have sound absorption and vibration isolation functions, with excellent sound absorption effect. The polypropylene material of the outer layer 204 enhances the overall structural strength of the duct and resists deformation caused by external compression or vibration. The symmetrical conical design of the first air guide plate 205 and the second air guide plate 206 guides the airflow entering the duct to concentrate and flow towards the central area, reducing eddy current loss at the duct wall, improving wind power transmission efficiency, and balancing the wind pressure at both ends of the duct to avoid local airflow turbulence.

[0031] Reference Figures 1-4 As shown, connecting structures 3 are installed at both ends of the outer side of the main air duct 1. The connecting structure 3 includes connecting blocks 301 fixed to both ends of the outer side of the main air duct 1, connecting pipes 302 installed at both ends of the main air duct 1, connecting plates 303 fixed to one side of the connecting pipes 302, sealing gaskets 304 fixed to one side of the connecting plates 303, threaded blocks 305 fixed to one end of the connecting plates 303, limit grooves 306 provided on the outer side of the threaded blocks 305, fixing seats 307 fixed on both sides of the connecting blocks 301, an internal cavity 308 provided inside the fixing seat 307, a movable rod 309 installed inside the internal cavity 308, a spring 310 installed on the outer side of the movable rod 309, and a spring 310 fixed at one end of the spring 310 and the bottom end of the movable rod 309. A reset plate 311 is fixed, and a plug rod 312 is fixed on one side of the reset plate 311. A threaded groove 313 is provided at one end of the connecting block 301. A movable block 314 is fixed at one end of the movable rod 309 on the outside of the fixed seat 307. The connecting blocks 301 are symmetrically distributed at both ends on the outside of the main air duct 1. The outer diameter of the connecting plate 303 is the same as the outer diameter of the connecting block 301. The threaded block 305 and the connecting block 301 are connected by a threaded groove 313. The fixed seat 307 is symmetrically distributed on both sides of the connecting block 301. The movable rod 309 and the reset plate 311 are connected by a spring 310 to form a telescopic structure. The limiting groove 306 is arranged in a ring. The plug rod 312 and the threaded block 305 are connected by a locking structure through the limiting groove 306.

[0032] The main air duct 1 and the connecting pipe 2 are initially connected via the threaded block 305 and the threaded groove 313. During connection, the movable block 314 is pulled to extend or retract the movable rod 309, which in turn causes the reset plate 311 to compress the spring 310, thereby moving the insertion rod 312 into the movable groove 308. Then, by rotating the threaded block 305, it is screwed into the threaded groove 313 of the connecting block 301 until the sealing gasket 304 is tightly fitted with the main air duct 1, completing the initial seal. When the threaded block 305 is tightened, the limiting groove 306 is aligned with the insertion rod 312, which in turn causes the spring force of the spring 310 to push the reset plate 311, causing the insertion rod 312 to be locked into the limiting groove 306, forming a locking fixation to prevent the threaded connection from loosening. Thus, through the double fixation of threaded connection and locking, the air duct is kept sealed in the vibration environment of the vehicle, avoiding air leakage or detachment, and ensuring the continuous and efficient operation of the air conditioning system.

[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A duct structure for automotive air conditioning, comprising a main duct (1); Its features are: The main air duct (1) is equipped with a protective structure (2) inside; Both ends of the main air duct (1) are equipped with connecting structures (3). The connecting structure (3) includes connecting blocks (301) fixed to both ends of the main air duct (1). Both ends of the main air duct (1) are equipped with connecting pipes (302). A connecting plate (303) is fixed to one side of the connecting pipe (302). A sealing gasket (304) is fixed to one side of the connecting plate (303). A threaded block (305) is fixed to one end of the connecting plate (303). A limit groove (306) is provided on the outer side of the threaded block (305). Both sides of the connecting block (301) are fixed with... A fixed base (307) is provided inside a built-in cavity (308). A movable rod (309) is installed inside the built-in cavity (308). A spring (310) is installed on the outside of the movable rod (309). A reset plate (311) is fixed to the bottom end of the movable rod (309) at one end of the spring (310). A plug rod (312) is fixed to one side of the reset plate (311). A threaded groove (313) is provided at one end of the connecting block (301). A moving block (314) is fixed to one end of the movable rod (309) on the outside of the fixed base (307).

2. The air duct structure for an automobile air conditioner according to claim 1, wherein: The protective structure (2) includes an inner layer (201) disposed inside the main air duct (1), a sound-absorbing cotton (202) disposed on the outside of the inner layer (201), a heat insulation layer (203) disposed on the outside of the sound-absorbing cotton (202), an outer layer (204) disposed on the outside of the heat insulation layer (203), a first air guide plate (205) fixed at one end inside the main air duct (1), and a second air guide plate (206) fixed at the other end inside the main air duct (1).

3. The air duct structure for an automobile air conditioner according to claim 2, wherein: The inner layer (201) is a polyethylene terephthalate film, the outer layer (204) is made of polypropylene, the sound-absorbing cotton (202) is made of polyester fiber cotton, and the heat insulation layer (203) is made of polyurethane foam.

4. The air duct structure for an automobile air conditioner according to claim 2, wherein: The outer diameters of the first air guide plate (205) and the second air guide plate (206) are the same as the inner diameters of the main air duct (1). The interiors of the first air guide plate (205) and the second air guide plate (206) are both conical. The first air guide plate (205) and the second air guide plate (206) are symmetrically distributed inside the main air duct (1).

5. The air duct structure for an automobile air conditioner according to claim 1, wherein: The connecting blocks (301) are symmetrically distributed at both ends on the outside of the main air duct (1). The outer diameter of the connecting plate (303) is the same as the outer diameter of the connecting block (301). The threaded block (305) and the connecting block (301) are connected by a threaded groove (313).

6. The air duct structure for an automobile air conditioner according to claim 1, wherein: The fixed base (307) is symmetrically distributed on both sides of the connecting block (301). The movable rod (309) and the reset plate (311) form a telescopic structure through the spring (310). The limiting groove (306) is arranged in a ring. The insertion rod (312) and the threaded block (305) form a locking structure through the limiting groove (306).

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