A kind of HVAC indoor unit air outlet anti-drop flexible connection device

Abstract

The utility model discloses a kind of HVAC indoor unit air outlet anti-falling flexible connection devices, belong to HVAC accessories technical field, including outdoor unit pipe, indoor unit pipe and flexible connecting pipe, both ends of flexible connecting pipe are fixedly connected with docking ring, in-end of docking ring is inlaid with inner air cushion, outer-end of docking ring is inlaid with outer air bag, and inner air cushion and outer air bag are communicated, outer-end of docking ring is slidably connected with extrusion ring, and extrusion ring is in contact with outer air bag, one end of extrusion ring close to outer air bag is inclined surface, inner-end of one side of extrusion ring away from outer air bag is fixedly connected with inner screw ring, it can be realized by the communication setting of inner air cushion and outer air bag, cooperate the extrusion drive of extrusion ring, different specifications of outdoor unit pipe and indoor unit pipe connection demand can be adapted, and the range of adaptation is more flexible, while inner air cushion is tightly attached to pipe wall after expansion to form wrapped type fit, can reduce gap generation, sealing effect is better, help to reduce the possibility of airflow leakage.

Description

Technical Field

[0001] This utility model relates to the field of HVAC accessories technology, and more specifically, to a flexible connection device for preventing the air outlet of an indoor HVAC unit from falling off. Background Technology

[0002] The HVAC indoor unit air outlet anti-detachment flexible connection device is a flexible connection component that adapts to the indoor unit air outlet and the air duct. Its core consists of a flame-retardant flexible substrate, a connection structure at both ends, and anti-detachment reinforcement.

[0003] Chinese Patent Publication No. CN223165193U discloses a gasket for preventing air conditioning pipes from falling off. This patent involves unscrewing a first and second circular limiting plate on a threaded rod, then moving a main gasket and a secondary gasket on the threaded rod to fit the width of the wall. Next, a first and second arc-shaped baffle are opened to fit against the wall. Then, the first and second circular limiting plates are tightened to limit the length of the main and secondary gaskets and the position of the first and second arc-shaped baffles. Finally, the air conditioning pipe passes through the gasket via a sliding groove on the threaded rod. This achieves a stable connection between the gasket and the wall hole while also adapting to walls of different thicknesses, resulting in good practical performance.

[0004] However, the flexible connection devices in the aforementioned patents have poor adaptability. Different specifications of indoor unit air outlets and ducts require customized flexible connection devices of corresponding sizes, resulting in insufficient versatility. Utility Model Content

[0005] 1. Technical problems to be solved

[0006] To address the problems existing in the prior art, the purpose of this utility model is to provide a flexible connection device for preventing the air outlet of an indoor unit of HVAC. It can achieve the connection between the inner air cushion and the outer air bladder, and with the compression drive of the compression ring, it can adapt to the connection requirements of different specifications of outdoor and indoor pipes, with a relatively flexible range of adaptability. At the same time, after the inner air cushion expands, it tightly adheres to the pipe wall to form a wrap-around fit, which can reduce the generation of gaps, provide a better sealing effect, and help reduce the possibility of airflow leakage.

[0007] 2. Technical Solution

[0008] To solve the above problems, the present invention adopts the following technical solution.

[0009] A flexible connection device for preventing the air outlet of an indoor unit of a heating, ventilation, and air conditioning system (HVAC) includes an outdoor unit pipe, an indoor unit pipe, and a flexible connection pipe. Both ends of the flexible connection pipe are fixedly connected to mating rings. An inner air cushion is embedded in the inner end of each mating ring, and an outer air bladder is embedded in the outer end of each mating ring. The inner air cushion and the outer air bladder are connected. A compression ring is slidably connected to the outer end of each mating ring, and the compression ring abuts against the outer air bladder. The end of the compression ring near the outer air bladder is beveled. By placing the flexible connection pipe between the outdoor unit pipe and the indoor unit pipe, and using a pair of mating rings respectively fitted onto the outer ends of the outdoor and indoor unit pipes, and then sliding the pair of compression rings, the compression rings compress the outer air bladder, forcing air into the inner air cushion. This causes the inner air cushion to expand and bulge, tightly wrapping and securing the outer ends of the outdoor and indoor unit pipes. This allows for the connection and fixation of outdoor and indoor unit pipes of different specifications, achieving an effective sealing effect.

[0010] Furthermore, an inner threaded ring is fixedly connected to the inner end of the compression ring on the side away from the outer airbag, and an outer threaded ring matching the inner threaded ring is embedded in the outer end of the mating ring. The outer threaded ring is located on the side of the outer airbag close to the flexible connecting tube. The inner threaded ring and the outer threaded ring are threadedly connected, so that the compression ring rotates and slides along the outer end of the mating ring to compress the outer airbag, thereby preventing the compression ring from being rebounded by the outer airbag and pushing the compression ring away from the compression of the outer airbag.

[0011] Furthermore, the inner end of the inner air cushion is fixedly connected to multiple fixing blocks, and the outer ends of the outer and inner tubes are provided with multiple fixing grooves that match the fixing blocks. When the inner air cushion expands and bulges, the inner air cushion is pre-forced and pushed to the fixing groove for limiting and fixing, preventing the outer or inner tube from being detached from the connection with the docking ring due to force.

[0012] Furthermore, a limiting ring is fixedly connected to the outer end of the docking ring, and the limiting ring is located on the side of the outer airbag away from the outer screw ring. The limiting ring abuts against the compression ring to limit its movement and prevent the compression ring from sliding too far and detaching from the compression of the outer airbag.

[0013] Furthermore, multiple guide blocks are fixedly connected to the inner wall of the docking ring on the side away from the flexible connector tube. Multiple guide grooves matching the guide blocks are opened at the outer ends of both the outdoor unit tube and the indoor unit tube. The multiple guide grooves and multiple fixed grooves are staggered. By sliding the guide blocks along the guide grooves, the outdoor unit tube and the indoor unit tube can be oriented to slide into the docking ring for docking. This facilitates the alignment of multiple inner air cushions with multiple fixed grooves, thereby making it convenient for multiple inner air cushions to be directly inserted into the fixed grooves.

[0014] Furthermore, a positioning ring is fixedly connected to the inner wall of the docking ring near the flexible connecting tube. A pair of positioning rings are used to position the external tube and the internal tube respectively by contacting them, preventing them from being inserted too much into the docking ring and causing misalignment between the inner air cushion and the fixing groove.

[0015] 3. Beneficial effects

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] (1) This solution connects the inner air cushion and the outer air bag, and with the extrusion drive of the extrusion ring, it can adapt to the connection requirements of different specifications of the outer and inner pipes, and the adaptation range is relatively flexible. At the same time, after the inner air cushion expands, it tightly adheres to the pipe wall to form a wrap-around fit, which can reduce the generation of gaps and has a better sealing effect, which helps to reduce the possibility of air leakage.

[0018] (2) In this solution, the fixing block on the inner air cushion and the fixing groove at the outer end of the pipe are engaged and matched. Combined with the extrusion ring of the threaded connection to prevent rebound, a double anti-drop protection is formed, which improves the stability of the pipe connection and can avoid loosening of the connection due to external force or vibration to a certain extent.

[0019] (3) In this solution, the cooperation between the guide block and the guide groove can realize the directional docking of the pipeline, the positioning ring can limit the insertion depth of the pipeline, and facilitate the quick alignment of the fixing block and the fixing groove, simplifying the adjustment steps in the installation process. In addition, the extrusion ring is easy to operate by means of thread drive, which helps to improve the installation efficiency and reduce the difficulty of subsequent maintenance. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a side sectional view of the docking ring of this utility model;

[0022] Figure 3 For the present utility model Figure 2 Enlarged view of point A in the middle.

[0023] Explanation of the labels in the diagram:

[0024] 1. Outdoor unit pipe; 2. Indoor unit pipe; 3. Flexible connecting pipe; 4. Connecting ring; 5. Inner air cushion; 6. Outer air bladder; 7. Extrusion ring; 8. Inner threaded ring; 9. Outer threaded ring; 10. Fixing block; 11. Limiting ring; 12. Guide block; 13. Positioning ring. Detailed Implementation

[0025] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0026] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] Example 1:

[0029] Please see Figures 1-3 A flexible connection device for preventing the air outlet of an indoor unit of a heating, ventilation, and air conditioning system (HVAC) is disclosed, comprising an outdoor unit pipe 1, an indoor unit pipe 2, and a flexible connection pipe 3. Both ends of the flexible connection pipe 3 are fixedly connected to mating rings 4. An inner air cushion 5 is embedded in the inner end of the mating ring 4, and an outer air bladder 6 is embedded in the outer end of the mating ring 4. The inner air cushion 5 and the outer air bladder 6 are connected. A compression ring 7 is slidably connected to the outer end of the mating ring 4, and the compression ring 7 abuts against the outer air bladder 6. The end of the compression ring 7 near the outer air bladder 6 is beveled. The mating rings 4 at both ends of the flexible connection pipe 3 provide a stable connection base. The connection between the inner air cushion 5 and the outer air bladder 6, combined with the beveled structure of the compression ring 7, allows the gas inside the outer air bladder 6 to be more smoothly introduced into the inner air cushion 5 during compression. This causes the inner air cushion 5 to expand and adhere to the outdoor unit pipe 1 and the indoor unit pipe 2, improving the sealing effect of the connection. Simultaneously, it can adapt to pipes of different specifications within a certain range, enhancing the flexibility of the device.

[0030] An inner threaded ring 8 is fixedly connected to the inner end of the compression ring 7 on the side away from the outer airbag 6. An outer threaded ring 9 matching the inner threaded ring 8 is inlaid on the outer end of the mating ring 4. The outer threaded ring 9 is located on the side of the outer airbag 6 near the flexible connecting tube 3. The inner threaded ring 8 on the compression ring 7 and the outer threaded ring 9 on the mating ring 4 form a threaded engagement, which can stably restrict the axial position of the compression ring 7, reduce the phenomenon of the compression ring 7 shifting due to the rebound of the outer airbag 6, help to continuously maintain the expansion pressure on the inner airbag 5, and further improve the stability of the connection structure.

[0031] Multiple fixing blocks 10 are fixedly connected to the inner end of the inner air cushion 5. Multiple fixing grooves matching the fixing blocks 10 are opened at the outer ends of the outer and inner ends of the outer air cushion 1 and the inner air cushion 2. When the inner air cushion 5 expands, it can drive the fixing blocks 10 to be inserted into the fixing grooves, forming additional limiting support. This can reduce the risk of the pipe and the docking ring 4 being relatively separated to a certain extent and improve the reliability of the connection.

[0032] A limiting ring 11 is fixedly connected to the outer end of the docking ring 4, and the limiting ring 11 is located on the side of the outer airbag 6 away from the outer screw ring 9. The limiting ring 11 at the outer end of the docking ring 4 can limit the compression ring 7 during the sliding process, preventing the compression ring 7 from sliding beyond the preset range. This not only helps to ensure the effective compression effect of the outer airbag 6, but also reduces the possibility of the compression ring 7 detaching from the docking ring 4, thus improving the convenience of the operation process.

[0033] Multiple guide blocks 12 are fixedly connected to the inner wall of the docking ring 4 on the side away from the flexible connecting pipe 3. Multiple guide grooves matching the guide blocks 12 are opened at the outer ends of the outdoor unit pipe 1 and the indoor unit pipe 2. The multiple guide grooves and multiple fixed grooves are staggered. By cooperating with the guide blocks 12 of the docking ring 4 and the guide grooves of the outdoor unit pipe 1 and the indoor unit pipe 2, the pipes can be guided to slide into the docking ring 4 in a directional manner. The staggered distribution of the guide grooves and fixed grooves helps the fixed blocks 10 on the inner air cushion 5 to quickly align with the fixed grooves, simplifying the adjustment steps during installation and improving assembly efficiency.

[0034] A positioning ring 13 is fixedly connected to the inner wall of the docking ring 4 near the flexible connecting pipe 3. The positioning ring 13 in the docking ring 4 can limit the insertion depth of the outdoor unit pipe 1 and the indoor unit pipe 2, reduce the misalignment of the inner air cushion 5 and the fixing groove due to excessive pipe insertion, help ensure the assembly accuracy of each component and improve the smoothness of the installation process.

[0035] Working principle:

[0036] During installation, first align the connecting rings 4 at both ends of the flexible connector 3 with the ports of the outdoor unit pipe 1 and the indoor unit pipe 2, respectively. The guide block 12 on the inner wall of the connecting ring 4 engages with the guide groove at the outer end of the pipe, guiding the pipe to slide directionally into the connecting ring 4. The positioning ring 13 inside the connecting ring 4 restricts the pipe insertion depth, preventing misalignment between the inner air cushion 5 and the fixing groove on the pipe. Simultaneously, the staggered distribution of the guide groove and the fixing groove helps the fixing block 10 on the inner air cushion 5 quickly align with the fixing groove. Then, rotate the compression ring 7, utilizing the threaded engagement between its inner threaded ring 8 and the outer threaded ring 9 at the outer end of the connecting ring 4 to allow the compression ring 7 to slide axially along the connecting ring 4. Its beveled end will gradually... The outer airbag 6 is gradually compressed, forcing the gas inside into the interconnected inner air cushion 5. This causes the inner air cushion 5 to expand and tightly adhere to the outer walls of the outer tube 1 and the inner tube 2. Simultaneously, the fixing block 10 is driven into the corresponding fixing groove to form a limiting support. During this process, the limiting ring 11 at the outer end of the docking ring 4 restricts the sliding range of the compression ring 7, preventing it from exceeding the preset position and affecting the compression effect or detaching from the docking ring 4. The threaded engagement structure can firmly fix the position of the compression ring 7, reducing the displacement caused by the rebound of the outer airbag 6, and continuously maintaining the expansion pressure of the inner air cushion 5. Finally, through the synergistic effect of each component, a stable connection, anti-detachment, and sealing effect of the pipeline are achieved.

[0037] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A flexible connection device for preventing the air outlet of an indoor unit of a heating, ventilation, and air conditioning system from falling off, comprising an outdoor unit pipe (1), an indoor unit pipe (2), and a flexible connection pipe (3), characterized in that: The flexible connecting tube (3) is fixedly connected to the front and rear ends with docking rings (4). The inner end of the docking ring (4) is inlaid with an inner air cushion (5), and the outer end of the docking ring (4) is inlaid with an outer air bag (6). The inner air cushion (5) and the outer air bag (6) are connected. The outer end of the docking ring (4) is slidably connected with a compression ring (7), and the compression ring (7) abuts against the outer air bag (6). The end of the compression ring (7) near the outer air bag (6) is obliquely cut.

2. The anti-detachment flexible connection device for the air outlet of an indoor unit of HVAC according to claim 1, characterized in that: The inner end of the compression ring (7) away from the outer airbag (6) is fixedly connected to an inner threaded ring (8), and the outer end of the mating ring (4) is inlaid with an outer threaded ring (9) that matches the inner threaded ring (8), and the outer threaded ring (9) is located on the side of the outer airbag (6) close to the flexible connecting tube (3).

3. The anti-detachment flexible connection device for the air outlet of an indoor unit of HVAC according to claim 1, characterized in that: The inner air cushion (5) is fixedly connected to a plurality of fixing blocks (10) at its inner end, and the outer ends of the outer tube (1) and the inner tube (2) are provided with a plurality of fixing grooves that match the fixing blocks (10).

4. The anti-detachment flexible connection device for the air outlet of an indoor unit of HVAC according to claim 1, characterized in that: The outer end of the docking ring (4) is fixedly connected to a limiting ring (11), and the limiting ring (11) is located on the side of the outer airbag (6) away from the outer spiral ring (9).

5. The anti-detachment flexible connection device for the air outlet of an indoor unit of HVAC according to claim 1, characterized in that: The inner wall of the docking ring (4) away from the flexible connecting pipe (3) is fixedly connected with multiple guide blocks (12). The outer ends of the external unit pipe (1) and the internal unit pipe (2) are provided with multiple guide grooves that match the guide blocks (12), and the multiple guide grooves and multiple fixed grooves are staggered.

6. The anti-detachment flexible connection device for the air outlet of an indoor unit of HVAC according to claim 1, characterized in that: A positioning ring (13) is fixedly connected to the inner wall of the docking ring (4) near the flexible connecting tube (3).

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