Low-resistance noise-reducing automobile air conditioner low-pressure pipe assembly

Abstract

The utility model discloses a low flow resistance noise reduction type automobile air conditioner low pressure pipe assembly relates to air conditioning pipe technical field, including pipe body subassembly and its outside setting multiple sets of limiting mechanism, both ends of pipe body subassembly all are fixedly connected with joint fixed establishment, pipe body subassembly includes the outer cover layer of the most outer layer and is made of sponge material, the inner cover layer of being located in the middle and being made of elastic alloy and the pipeline layer of the most inner layer and being made of modified nylon, the utility model discloses with three -layer composite pipe body subassembly as the core, and the modified nylon of pipeline layer reduces flow resistance, prevents refrigerant penetration, and the elastic alloy of inner cover layer avoids sharp bend, prevents fracture, and the sponge buffer of outer cover layer reduces noise, protects pipe wall, and multiple sets of limiting mechanism prevent pipe body to sway, and both end joint fixed establishment guarantees sealing. Overall realization flow resistance reduces, and noise reduces, and refrigerant leakage rate reduces, and service life is extended, and low flow resistance, noise reduction and durability are given priority to.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning pipe technology, and in particular to a low-flow-resistance noise-reducing low-pressure pipe assembly for automotive air conditioning. Background Technology

[0002] The low-pressure pipe assembly of an automotive air conditioning system is a key component connecting the evaporator and the compressor. It sends the low-temperature, low-pressure refrigerant from the evaporator back to the compressor, ensuring the circulation of refrigerant within the system.

[0003] Traditional piping systems use elbows with small curvature radii, right-angle joints, or metal pipes with rough inner walls, which causes turbulence and eddies in the refrigerant flow, increasing flow resistance. 90° right-angle elbows can cause a localized increase in flow velocity, exacerbating pressure loss and increasing compressor power consumption. Utility Model Content

[0004] The purpose of this utility model is to solve the problems existing in the prior art by proposing a low-flow-resistance noise-reducing automotive air conditioning low-pressure pipe assembly.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a low-flow-resistance noise-reducing automotive air conditioning low-pressure pipe assembly, comprising a pipe body assembly and multiple sets of limiting mechanisms disposed on its outer side, wherein both ends of the pipe body assembly are fixedly connected to a joint fixing mechanism, the pipe body assembly comprising an outermost outer sleeve layer made of sponge material, an inner sleeve layer in the middle made of elastic alloy, and an innermost pipe layer made of modified nylon, wherein the inner sleeve layer wraps around the outside of the pipe layer, and the outer sleeve layer is bonded to the outside of the inner sleeve layer.

[0006] Preferably, the outer sheath and the pipe layer have the same thickness, and the inner sheath has a thickness of 0.2-0.3 times that of the pipe layer.

[0007] Preferably, the limiting mechanism includes a double-groove clamp, an internal hexagon bolt, and a plastic collar. Both ends of the double-groove clamp are bent into C-shaped grooves, and a positioning hole is provided in the middle of the double-groove clamp. The internal hexagon bolt passes through the positioning hole and is fixed inside the vehicle.

[0008] Preferably, the plastic collar is fitted onto the outside of the pipe assembly and engaged in the C-groove at the end of the double-groove hoop.

[0009] Preferably, the joint fixing mechanism includes a metal connector, a sealing ring, and a straight plate. One end of the straight plate is sleeved on the outer ring surface of the metal connector, and the metal connector is inserted into the port of the pipe assembly and fixed by a clamp.

[0010] Preferably, a sealing ring is engaged at the other end of the metal connector, and a side groove is provided at the other end of the straight plate.

[0011] Compared with the prior art, the advantages and positive effects of this utility model are as follows: 1. This utility model uses a three-layer composite pipe assembly as its core. The modified nylon of the pipe layer reduces flow resistance and prevents refrigerant penetration; the elastic alloy of the inner sleeve layer prevents sharp bends and breakage; and the sponge of the outer sleeve layer buffers noise and protects the pipe wall. Multiple limiting mechanisms prevent pipe swaying, and the end joint fixing mechanisms ensure sealing. Overall, it achieves reduced flow resistance, reduced noise, reduced refrigerant leakage rate, and extended service life, balancing low flow resistance, noise reduction, and durability.

[0012] 2. In this utility model, the metal pipe, sealing ring and straight plate form a double seal in the joint fixing mechanism, which prevents leakage and ensures stable connection; the plastic collar of the limiting mechanism can slide and adapt, and the double groove hoop and internal hexagon bolts limit the shaking. It also has installation adaptability, does not require additional pipe cutting, improves assembly efficiency and extends vibration fatigue life. Attached Figure Description

[0013] Figure 1 A three-dimensional structural diagram of a low-flow-resistance noise-reducing automotive air conditioning low-pressure pipe assembly is provided for this utility model. Figure 2 This utility model presents a three-dimensional structural diagram of a limiting mechanism in a low-flow-resistance, noise-reducing automotive air conditioning low-pressure pipe assembly. Figure 3 This utility model provides a three-dimensional structural diagram of a connector fixing mechanism in a low-flow-resistance, noise-reducing automotive air conditioning low-pressure pipe assembly. Figure 4 This utility model provides a cross-sectional view of the pipe body component in a low-flow-resistance, noise-reducing automotive air conditioning low-pressure pipe assembly.

[0014] Legend: 1. Pipe assembly; 11. Outer sleeve; 12. Inner sleeve; 13. Pipe layer; 2. Limiting mechanism; 21. Double groove clamp; 22. Socket head bolt; 23. Positioning hole; 24. Plastic collar; 3. Joint fixing mechanism; 31. Metal connecting pipe; 32. Sealing ring; 33. Straight plate; 34. Side groove. Detailed Implementation

[0015] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0016] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0017] Example 1: As Figure 1 - Figure 4 As shown, this utility model provides a low-flow-resistance noise-reducing automotive air conditioning low-pressure pipe assembly, including a pipe body assembly 1 and multiple sets of limiting mechanisms 2 arranged on its outer side. Both ends of the pipe body assembly 1 are fixedly connected to a joint fixing mechanism 3. The pipe body assembly 1 includes an outermost outer sleeve layer 11 made of sponge material, an inner sleeve layer 12 made of elastic alloy in the middle, and an innermost pipe layer 13 made of modified nylon. The inner sleeve layer 12 wraps around the outside of the pipe layer 13, and the outer sleeve layer 11 is bonded to the outside of the inner sleeve layer 12. The outer sleeve layer 11 and the pipe layer 13 have the same thickness, and the thickness of the inner sleeve layer 12 is 0.2-0.3 times the thickness of the pipe layer 13.

[0018] The specific settings and functions of this embodiment are described below: Pipe layer 13 serves as the core channel for refrigerant flow. The modified nylon material makes its inner surface roughness low (reducing fluid friction) and light in weight (reducing the overall vehicle load). At the same time, it has excellent resistance to refrigerant permeation, which can block refrigerant from permeating and leaking from the pipe wall and ensure the efficiency of the refrigeration cycle.

[0019] The high elastic recovery capability of the inner sleeve layer 12 elastic alloy can prevent excessive bending or sharp bends in the pipe assembly 1 when it is arranged inside the car, and force the pipe to extend in a small arc shape, reducing the turbulence generated when the refrigerant flows; its high toughness can prevent the pipe from breaking due to vibration and impact, and extend its service life.

[0020] The outer layer 11, made of sponge material, has cushioning and shock absorption properties. It can absorb the vibration of the pipe assembly 1 itself and the vibration of the external environment, while also isolating the refrigerant flow noise inside the pipe from radiating to the outside, thus playing a preliminary noise reduction role. In addition, it can also protect the inner layer 12 and the pipe layer 13 from external scratches and collision damage.

[0021] The low-roughness inner wall of the pipe layer 13 and the forced small-arc pipe shape of the inner sleeve layer 12 reduce refrigerant flow resistance under the dual effect, thereby improving refrigerant circulation efficiency, accelerating air conditioning cooling speed, and reducing compressor power consumption. The buffering and shock absorption of the outer sleeve layer 11 and the anti-sway function of the limiting mechanism 2 can reduce pipe vibration noise and collision noise, thereby reducing the operating noise of the pipe assembly 1 itself and improving the quietness of the vehicle interior. The impermeability of the pipe layer 13 and the sealing connection of the joint fixing mechanism 3 can reduce the refrigerant leakage rate. The high toughness of the inner sleeve layer 12 improves the pipe's fracture resistance and extends its overall service life.

[0022] The limiting mechanism 2, by adjusting its position and fixing it inside the vehicle, can limit the swaying amplitude of the pipe assembly 1 during vehicle operation, prevent the pipe from colliding with surrounding components and generating additional noise, and at the same time maintain the stable arrangement of the pipeline to ensure low flow resistance characteristics.

[0023] The joint fixing mechanism 3 serves as a connecting bridge between the pipe assembly 1 and the evaporator and compressor, enabling a sealed connection between the three components, preventing refrigerant leakage at the joint, and simultaneously providing a refrigerant flow channel.

[0024] Example 2: Figure 1 - Figure 3 As shown, the limiting mechanism 2 includes a double-groove clamp 21, an internal hexagon bolt 22, and a plastic collar 24. Both ends of the double-groove clamp 21 are bent into C-shaped grooves. A positioning hole 23 is provided in the middle of the double-groove clamp 21. The internal hexagon bolt 22 passes through the positioning hole 23 and is fixed inside the car. The plastic collar 24 is sleeved on the outside of the pipe assembly 1 and is snapped into the C-shaped groove at the end of the double-groove clamp 21. The joint fixing mechanism 3 includes a metal pipe 31, a sealing ring 32, and a straight plate 33. One end of the straight plate 33 is sleeved on the outer ring surface of the metal pipe 31. The metal pipe 31 is inserted into the port of the pipe assembly 1 and fixed by a clamp. The other end of the metal pipe 31 is snapped into the sealing ring 32. The other end of the straight plate 33 is provided with a side groove 34.

[0025] The overall effect of this embodiment is that, in the joint fixing mechanism 3, the metal pipe 31 is sealed and fixed to the port of the pipe assembly 1 by clamps, and the sealing ring 32 fits tightly with the port of the evaporator or compressor. The double sealing structure can completely block the leakage path of refrigerant at the joint; at the same time, the straight plate 33 is fixed to the evaporator or compressor housing by the side groove 34 and screws, which further enhances the stability of the joint connection, avoids the joint loosening caused by vehicle vibration, reduces the leakage rate at the joint, and ensures the stable cooling performance of the air conditioning system.

[0026] In the limiting mechanism 2, the plastic collar 24 can slide flexibly along the pipe assembly 1, which is convenient to adjust the limiting position according to the internal structure of the car. Its engagement with the C-groove at the end of the double groove clamp 21 can avoid squeezing damage to the outer wall of the pipe assembly 1 during limiting. The internal hex bolt 22 passes through the positioning hole 23 in the middle of the double groove clamp 21 and is fixed inside the car, which greatly reduces the vibration of the pipe and the collision noise with surrounding components. Combined with the buffering effect of the outer jacket 11 of the pipe assembly 1, the overall operating noise of the air conditioning low-pressure pipe assembly is reduced.

[0027] The C-groove structure of the double groove clamp 21, the sliding characteristics of the plastic collar 24, and the adjustable fixing of the side groove 34 of the straight plate 33 enable the pipe assembly 1 to adapt to the internal space layout of different vehicle models. During installation, no additional bending or cutting of the pipe is required, which not only ensures the small arc and low flow resistance of the pipe, but also reduces the difficulty of installation and improves assembly efficiency.

[0028] The usage and working principle of this device are as follows: First, place the straight plate 33 over the middle of the metal connecting pipe 31. Then, insert the metal connecting pipe 31 into the port of the pipe assembly 1 and secure it with clamps for sealing. Repeat this process at both ends of the pipe assembly 1. Next, place the sealing ring 32 over the other end of the metal connecting pipe 31 and insert it into the evaporator or compressor port, securing it with clamps as well. The screw passes through the side groove 34 and is fixed to the evaporator or compressor housing, further strengthening the connection stability at both ends and preventing leakage. The innermost pipe layer 13 of the pipe assembly 1 is made of modified nylon, which is lightweight and has a small inner surface roughness, significantly improving refrigerant flow efficiency. It also has good resistance to refrigerant permeation, effectively reducing refrigerant leakage. The pipe assembly 1 is then... Based on the internal structure of the car, the inner sleeve 12 of the tube assembly 1 is made of elastic alloy, which is close to and fits the fixed carrier. It has both high elastic recovery ability (springs back after deformation under force) and high toughness (not easy to break). When close to the fixed carrier, the entire tube assembly 1 will not bend too much. The pipe is arranged in a small arc to avoid turbulence caused by sharp bends. The plastic collar 24 can slide on the outside of the tube assembly 1. The outermost outer sleeve 11 of the tube assembly 1 plays a role in buffering and protection. The position of the limiting mechanism 2 on the tube assembly 1 is adjusted. The double groove clamp 21 is fixed by the internal hex bolt 22. The double groove clamp 21 limits the tube assembly 1, reduces the shaking during the car's operation, and reduces the generation of noise.

[0029] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A low-flow-resistance, noise-reducing automotive air conditioning low-pressure pipe assembly, characterized in that, The tube assembly (1) includes a tube body assembly (1) and multiple sets of limiting mechanisms (2) provided on its outer side. Both ends of the tube body assembly (1) are fixedly connected to joint fixing mechanisms (3). The tube body assembly (1) includes an outermost outer layer (11) made of sponge material, an inner layer (12) made of elastic alloy in the middle, and an innermost pipe layer (13) made of modified nylon. The inner layer (12) wraps around the outside of the pipe layer (13), and the outer layer (11) is bonded to the outside of the inner layer (12).

2. The low-flow-resistance, noise-reducing automotive air conditioning low-pressure pipe assembly according to claim 1, characterized in that: The outer layer (11) and the pipe layer (13) have the same thickness, and the inner layer (12) has a thickness of 0.2-0.3 times that of the pipe layer (13).

3. The low-flow-resistance noise-reducing automotive air conditioning low-pressure pipe assembly according to claim 2, characterized in that: The limiting mechanism (2) includes a double groove hoop (21), an internal hex bolt (22) and a plastic collar (24). Both ends of the double groove hoop (21) are bent into C-shaped grooves. A positioning hole (23) is provided in the middle of the double groove hoop (21). The internal hex bolt (22) passes through the positioning hole (23) and is fixed inside the car.

4. The low-flow-resistance noise-reducing automotive air conditioning low-pressure pipe assembly according to claim 3, characterized in that: The plastic collar (24) is fitted on the outside of the pipe assembly (1) and snapped into the C-groove at the end of the double groove clamp (21).

5. The low-flow-resistance noise-reducing automotive air conditioning low-pressure pipe assembly according to claim 4, characterized in that: The joint fixing mechanism (3) includes a metal tube (31), a sealing ring (32) and a straight plate (33). One end of the straight plate (33) is sleeved on the outer ring surface of the metal tube (31), and the metal tube (31) is inserted into the port of the pipe assembly (1) and fixed by a clamp.

6. The low-flow-resistance, noise-reducing automotive air conditioning low-pressure pipe assembly according to claim 5, characterized in that: The other end of the metal connector (31) is fitted with a sealing ring (32), and the other end of the straight plate (33) is provided with a side groove (34).

Images