Pipeline quick connection structure and heat pump unit

Abstract

The utility model relates to a kind of pipeline quick connection structure and heat pump unit, and quick connection structure includes first pipeline, second pipeline and elastic clamp;First pipeline is provided with first joint, second pipeline is provided with second joint, the outer diameter of first joint is less than the inner diameter of second joint, and first joint is embedded into second joint;First protruding part is provided on the surface of second joint, and elastic clamp is provided with limiting slot, limiting slot is sleeved on the outer periphery of first protruding part, and elastic clamp is respectively attached to the surface of first pipeline and second joint.This application is connected quickly by the simple operation of one insertion and one shrink;When needing to maintain, just elastic clamp can be separated pipeline, realize quick local replacement, solve the pain point of traditional welding structure after-sales difficulty.In addition, the mechanical interlock formed by protruding part and elastic clamp can reliably withstand axial tension, ensure stable connection.

Description

Technical Field

[0001] The utility model relates to the product technical field of plumbing pipe fittings, in particular to a quick pipe connection structure and a heat pump unit. Background Art

[0002] In the field of production and manufacturing of refrigeration and heating equipment such as heat pumps and heating machines, the pipeline connection of the internal waterway systems (such as refrigerant waterways, cooling waterways, etc.) is a crucial process link. At present, the connection method generally adopted in this field is the traditional welding technology, that is, the interfaces of two sections of metal pipes are directly melted at high temperature and then connected into one piece. Although this welding method can achieve firm connection and reliable sealing, it has many inherent drawbacks in practical application. First of all, in the production and manufacturing link, welding operation has high skill requirements for workers, and the process is cumbersome, involving multiple steps such as pre-welding cleaning, welding execution, and post-welding inspection, which seriously restricts the assembly efficiency of the production line.

[0003] Secondly, a more prominent problem lies in the after-sales maintenance and service link. Since the welded connection is an undismantable integral structure, when a certain pipe section, valve or sensor inside the unit fails, maintenance personnel must cut the entire welded pipe, remove the damaged component, and then re-weld a new pipe. This process not only has limited operating space and high technical difficulty, but often requires partial or complete disassembly of the entire unit, resulting in long maintenance man-hours and high costs, bringing great inconvenience and burden to users and service providers. Contents of the Utility Model

[0004] Based on this, it is necessary to provide a quick pipe connection structure and a heat pump unit to address the above problems.

[0005] The present application provides a quick pipe connection structure, comprising a first pipe, a second pipe and an elastic clamp;

[0006] A first joint is arranged on the first pipe, a second joint is arranged on the second pipe, the outer diameter of the first joint is smaller than the inner diameter of the second joint, and the first joint is embedded into the second joint;

[0007] A first protruding portion is arranged on the surface of the second joint, the elastic clamp is provided with a limit slot, the limit slot is sleeved on the outer periphery of the first protruding portion, and the elastic clamp is respectively attached to the surfaces of the first pipe and the second joint.

[0008] This application discloses a quick-connect pipe structure, which consists of a first pipe, a second pipe, and an elastic clamp. A first connector of the first pipe is embedded into a second connector of the second pipe, which has a larger inner diameter. The second connector has a first protrusion. A limiting groove on the elastic clamp fits around the outer periphery of this first protrusion and fits tightly against the surfaces of the first pipe and the second connector. Based on this, the quick-connect pipe structure of this application achieves rapid connection between the first and second pipes through a simple insertion and retraction operation. Simultaneously, when maintenance is required, the pipes can be separated simply by removing the elastic clamp, enabling rapid partial replacement of damaged components and solving the pain points of difficult and costly after-sales maintenance of welded structures. Furthermore, the quick-connect structure of this application, through the mechanical interlocking formed by the protrusion and the elastic clamp, can reliably withstand axial tensile force, ensuring the stability of the connection and avoiding potential quality defects that may exist in welding.

[0009] In one embodiment, a sealing ring is provided in the gap between the first connector and the second connector. By providing the sealing ring in the annular gap formed between the first connector and the second connector, the gap between the first connector and the second connector is sealed, ensuring the sealing integrity of pressurized water systems such as heat pumps and heating units.

[0010] In one embodiment, the surface of the first connector is provided with two spaced-apart first annular limiting portions, and the gap between the two first annular limiting portions forms an assembly groove, on which the sealing ring is installed. By installing the sealing ring in the assembly groove formed on the surface of the first connector, the problem of the sealing ring rolling, twisting, axial displacement, or even falling off due to frictional resistance during the insertion of the first connector into the second connector is avoided. Furthermore, the first annular limiting portions prevent the sealing ring from shifting or wearing under vibration or impact that the pipeline may experience. This fixing method reduces abnormal stress on the sealing ring, helps maintain its elasticity, and prevents failure.

[0011] In one embodiment, the elastic clamp includes a connecting block and two arc-shaped clamping arms connected to both sides of the connecting block. The arc-shaped clamping arms fit against the surfaces of the first pipe and the second connector, and each arc-shaped clamping arm has a limiting groove. The elastic clamp, composed of a connecting block and two arc-shaped clamping arms connected to its two sides, allows for easy opening and closing of the clamping arms when they need to be installed or removed. This structure requires no tools; simply pinching the ends of the two arc-shaped clamping arms together allows the limiting groove of the elastic clamp to fit over the protrusion on the connector. This simplifies operation and reduces effort. Furthermore, after the elastic clamp is engaged, the connecting block and clamping arms together generate a continuous, uniform, and powerful radial locking force on the pipe surface, thereby improving the reliability and vibration resistance of the connection.

[0012] In one embodiment, the first protrusion is an annular protrusion structure, and the limiting groove is arc-shaped, with the shape of the annular protrusion structure matching the shape of the limiting groove. By having the first protrusion be an annular protrusion structure surrounding the pipe, and the arc-shaped limiting groove matching the shape of the annular protrusion structure, the maximum area of ​​the limiting groove wall fits against the outer periphery of the first protrusion. This ensures that when the pipe is subjected to axial tensile force, the locking force is evenly distributed across the entire clamp and pipe, avoiding stress concentration. This provides tensile strength and overall connection rigidity, making the connection more robust and reliable.

[0013] In one embodiment, the second connector has a first limiting platform, and one of the first annular limiting portions on the first connector abuts against the first limiting platform. By having the first annular limiting portion on the first connector abut against the first limiting platform in the second connector, the first connector is prevented from extending further into the second pipe, thereby defining the relative positions of the first connector and the second connector.

[0014] In one embodiment, the first connector has a second annular limiting portion formed on the first limiting platform on the side away from the first limiting platform. By also forming a second annular limiting portion at the first connector, the combined action of the first annular limiting portion and the second annular limiting portion can reduce the movement space of the first connector inside the second connector, thereby controlling the insertion depth of the sealing ring and preventing the insertion end of the first connector from being pushed out too much due to water pressure, which would lead to sealing failure.

[0015] In some embodiments, the arc-shaped clamping arm includes a first sub-clamping arm and a second sub-clamping arm. The first end of the first sub-clamping arm and the first end of the second sub-clamping arm are respectively connected to the connecting block. The second end of the first sub-clamping arm is connected to the second end of the second sub-clamping arm. The gap between the first and second sub-clamping arms forms the limiting groove. The second connector has a second limiting platform formed at the first protrusion, and the second sub-clamping arm abuts against the second limiting platform. By designing a single arc-shaped clamping arm as composed of a first and a second sub-clamping arm, and with the gap between these two sub-clamping arms forming the limiting groove, a precise locking structure is provided for the protrusion on the pipe. This ensures that the elastic clamp can be accurately locked in a preset position, preventing axial movement on the pipe, thereby locking the connection between the first and second connectors and preventing axial movement between the first and second pipes. When the pipe is subjected to a pull-out force, the force can be directly transmitted through the two independent sub-clamping arms to the connecting block, which serves as the elastic center, avoiding potential problems such as uneven force distribution and local deformation.

[0016] In some embodiments, the first clamping space formed by the two opposing first sub-clamping arms is adapted to the outer diameter of the first pipe, and the diameter of the first clamping space is smaller than the diameter of the second annular limiting portion. The second clamping space formed by the two opposing second sub-clamping arms is adapted to the outer diameter of the second connector. Because the shape and size of the first clamping space formed by the two opposing first sub-clamping arms match the outer diameter of the first pipe, and the second clamping space formed by the two opposing second sub-clamping arms also matches the outer diameter of the second connector, when the elastic clamp is tightened, the first and second sub-clamping arms will correspondingly and tightly fit against the outer wall of the first pipe and the outer wall of the second connector, allowing the radial locking force applied by the elastic clamp to be evenly distributed across the entire contact surface, effectively avoiding local stress concentration, thereby providing stronger vibration resistance and tensile strength. Furthermore, because the diameter of the first clamping space is smaller than the diameter of the second annular limiting portion, the first sub-clamping arms can prevent the first connector from sliding out of the second connector.

[0017] In one embodiment, the connection between the second end of the first sub-clamping arm and the second end of the second sub-clamping arm is bent to form an operating part. By bending outward at the connection between the ends of the first and second sub-clamping arms, an operating part is formed that is radially opposite to the clamping space. That is, when the elastic clamp forms a clamping space for clamping the pipe, its side away from the pipe is bent to form an operating part for applying force by hand. This allows the user to apply force to the entire clamp very naturally and effortlessly when pinching the operating part outward, thereby driving the connecting block to undergo elastic deformation and allowing the inner clamping space to open smoothly.

[0018] In one embodiment, the first pipe is further provided with a third connector for connecting to the third pipe via another elastic clamp.

[0019] In one embodiment, the second pipe is further provided with a fourth connector for connecting to the fourth pipe via another of the aforementioned elastic clamps.

[0020] A heat pump unit includes the quick-connect pipe structure described in any of the above claims. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the quick-connect pipe structure in one embodiment;

[0022] Figure 2 This is an exploded view of a quick-connect pipe structure in one embodiment;

[0023] Figure 3 This is a cross-sectional view of a quick-connect pipe structure in one embodiment;

[0024] Figure 4 for Figure 3 Enlarged view of section A.

[0025] The correspondence between the reference numerals and the component names is as follows:

[0026] 10 First pipe, 11 First connector, 112 First annular limiting part, 113 Assembly groove, 114 Second annular limiting part;

[0027] 20 Second pipe, 21 Second connector, 211 First protrusion, 212 First limiting platform, 215 Second limiting platform;

[0028] 30 Elastic clamp, 31 Connecting block, 32 Arc-shaped clamping arm, 321 First sub-clamping arm, 322 Second sub-clamping arm, 323 Operating part, 301 Limiting groove;

[0029] 40 sealing ring. Detailed Implementation

[0030] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0031] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0032] The following describes some embodiments of the quick-connect pipe structure and heat pump unit of the present invention with reference to the accompanying drawings.

[0033] like Figures 1 to 4 As shown, this embodiment discloses a quick-connect pipe structure, including a first pipe 10, a second pipe 20, and an elastic clamp 30;

[0034] A first connector 11 is provided on the first pipe 10, and a second connector 21 is provided on the second pipe 20. The outer diameter of the first connector 11 is smaller than the inner diameter of the second connector 21, and the first connector 11 is embedded in the second connector 21.

[0035] The second connector 21 has a first protrusion 211 on its surface, and the elastic clamp 30 has a limiting groove 301. The limiting groove 301 is fitted around the outer periphery of the first protrusion 211, and the elastic clamp 30 is respectively attached to the surface of the first pipe 10 and the second connector 21.

[0036] This application discloses a quick-connect pipe structure, which consists of a first pipe 10, a second pipe 20, and an elastic clamp 30. The first connector 11 of the first pipe 10 is embedded in the second connector 21 of the second pipe 20, which has a larger inner diameter. The second connector 21 has a first protrusion 211. The limiting groove 301 on the elastic clamp 30 simultaneously fits around the outer periphery of this first protrusion 211 and tightly adheres to the surfaces of the first pipe 10 and the second connector 21. Based on this, the quick-connect pipe structure of this application achieves rapid connection between the first pipe 10 and the second pipe 20 through a simple insertion and retraction operation. Furthermore, when maintenance is required, the pipes can be separated simply by removing the elastic clamp 30, enabling rapid partial replacement of damaged components and solving the pain points of difficult and costly after-sales maintenance of welded structures. In addition, the quick-connect structure of this application, through the mechanical interlocking formed by the protrusion and the elastic clamp 30, can reliably withstand axial tensile force, ensuring the stability of the connection and avoiding potential quality problems associated with welding.

[0037] Wherein, one end of the first pipe 10 is integrated with a first connector 11, and one end of the second pipe 20 is integrated with a second connector 21. The outer diameter of the first connector 11 is configured to be smaller than the inner diameter of the second connector 21, so that the first connector 11 can be inserted into the second connector 21 to complete the initial connection and realize the connection between the first pipe 10 and the second pipe 20.

[0038] The elastic clamp 30 can be a component with annular or C-shaped clamping space, and the elastic clamp 30 is provided with a limiting groove 301 for restricting the movement of the first pipe 10 and the second pipe 20. The surface of the second connector 21 is provided with a first protrusion 211. By locking the limiting groove 301 of the elastic clamp 30 into the outer periphery of the first protrusion 211, and furthermore, the elastic clamp 30 is elastic. Relying on the elasticity of the material itself, the elastic clamp 30 can fit tightly against the surface of the first pipe 10 and the second connector 21, thereby preventing the relative movement of the first connector 11 and the second connector 21 in the axial direction and providing a continuous radial clamping force to ensure the stability of the connection.

[0039] Specifically, the connection process between the first pipe 10 and the second pipe 20 is as follows: First, insert the first connector 11 into the second connector 21, and then put the limiting groove 301 of the elastic clamp 30 onto the already connected first protrusion 211. The elasticity of the elastic clamp 30 is used to automatically lock the first connector 11 and the second connector 21, thereby achieving a quick connection.

[0040] like Figure 3 and Figure 4 As shown, in addition to the features of the above embodiments, this embodiment further specifies that a sealing ring 40 is provided in the gap between the first connector 11 and the second connector 21.

[0041] The above embodiment further specifies that a sealing ring 40 is provided in the annular gap formed between the first connector 11 and the second connector 21. Based on this, the sealing ring 40 is used to seal the gap between the first connector 11 and the second connector 21, ensuring the sealing integrity of pressurized water circuit systems such as heat pumps and heating machines.

[0042] like Figures 2 to 4 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the surface of the first connector 11 is provided with two spaced-apart first annular limiting portions 112, and the gap between the two first annular limiting portions 112 forms an assembly groove 113, and the sealing ring 40 is installed on the assembly groove 113.

[0043] The above embodiment further defines the mounting groove 113 formed on the surface of the first connector 11 for the sealing ring 40, so as to avoid the sealing ring 40 rolling, twisting or axially displacing or even falling off due to frictional resistance when the first connector 11 is inserted into the second connector 21. In addition, the setting of the annular limiting part 112 makes it less likely for the sealing ring 40 to move or wear under the vibration or impact that the pipeline may be subjected to. This fixing method can reduce the abnormal stress on the sealing ring 40, help maintain its elasticity and prevent failure.

[0044] like Figures 2 to 4As shown, in addition to the features of the above embodiments, this embodiment further defines that: the elastic clamp 30 includes a connecting block 31 and two arc-shaped clamping arms 32 connected to both sides of the connecting block 31, the arc-shaped clamping arms 32 are attached to the surfaces of the first pipe 10 and the second connector 21, and the arc-shaped clamping arms 32 are provided with limiting grooves 301.

[0045] The above embodiment further defines the elastic clamp 30 as consisting of a connecting block 31 and two arc-shaped clamping arms 32 connected to its two sides. When it is necessary to install or remove the elastic clamp 30, it is only necessary to apply an expansion force to the ends of the two arc-shaped clamping arms 32. Through the elastic deformation of the connecting block 31 or the connection between the connecting block 31 and the arc-shaped clamping arms 32, the two clamping arms can be easily opened or closed. This structure does not require any tools. It is only necessary to pinch the ends of the two arc-shaped clamping arms 32 together to make the limiting groove 301 of the elastic clamp 30 fit on the outer periphery of the protrusion on the joint. This not only makes the operation simple and labor-saving, but also allows the connecting block 31 and the clamping arms to generate a continuous, uniform and strong radial locking force after the elastic clamp 30 is engaged. This force acts on the pipe surface, thereby improving the reliability and vibration resistance of the connection.

[0046] like Figure 3 and Figure 4 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the first protrusion 211 is an annular protrusion structure, the shape of the limiting groove 301 is arc-shaped, and the shape of the annular protrusion structure is adapted to the shape of the limiting groove 301.

[0047] The above embodiment further defines the first protrusion 211 as an annular protrusion structure surrounding the pipe, and the arc-shaped limiting groove 301 is adapted to the shape of the annular protrusion structure, so that the maximum area of ​​the groove wall of the limiting groove 301 fits the outer periphery of the first protrusion 211, so that when the pipe is subjected to axial tensile force, the locking force can be evenly distributed to the entire clamp and the pipe, avoiding stress concentration, thereby providing tensile strength and overall connection rigidity, making the connection more firm and reliable.

[0048] like Figure 3 and Figure 4 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: a first limiting platform 212 is provided in the second connector 21, and one of the first annular limiting portions 112 on the first connector 11 abuts against the first limiting platform 212.

[0049] The above embodiment further limits the first annular limiting part on the first connector to abut against the first limiting platform inside the second connector, thereby preventing the first connector from extending further into the second pipe and thus limiting the relative position of the first connector and the second connector.

[0050] like Figure 3 and Figure 4 As shown, in addition to the features of the above embodiment, the first connector 11 has a second annular limiting portion 114 formed at the first limiting platform 212 on the side away from the first limiting platform 212.

[0051] The above embodiment further specifies that a second annular limiting part is also formed at the first connector. Under the combined action of the first annular limiting part and the second annular limiting part, the movement space of the first connector inside the second connector can be reduced, thereby controlling the insertion depth of the sealing ring and preventing the insertion end of the first connector from being pushed out too much due to water pressure, which would lead to sealing failure.

[0052] like Figure 2 and Figure 4 As shown, in addition to the features of the above embodiments, this embodiment further specifies that the arc-shaped clamping arm 32 includes a first sub-clamping arm 321 and a second sub-clamping arm 322. The first end of the first sub-clamping arm 321 and the first end of the second sub-clamping arm 322 are respectively connected to the connecting block 31. The second end of the first sub-clamping arm 321 is connected to the second end of the second sub-clamping arm 322. The gap between the first sub-clamping arm 321 and the second sub-clamping arm 322 forms a limiting groove 301. The second connector 21 has a second limiting platform 215 formed at the first protrusion 211. The second sub-clamping arm 322 abuts against the second limiting platform 215.

[0053] The above embodiment further specifies that the single arc-shaped clamping arm 32 is designed to consist of a first sub-clamping arm 321 and a second sub-clamping arm 322, and the gap between the two sub-clamping arms forms a limiting groove 301, which provides a precise snap-fit ​​structure for the protrusion on the pipe, ensuring that the elastic clamp 30 can be accurately locked in the preset position, preventing it from axially moving on the pipe, thereby locking the connection between the first connector 11 and the second connector 21, avoiding axial movement between the first pipe 10 and the second pipe 20, so that when the pipe is subjected to a pull-out force, the force can be directly transmitted through the two independent sub-clamping arms to the connecting block 31, which is connected to them as the elastic center, avoiding possible problems such as uneven force distribution and local deformation.

[0054] In addition to the features of the above embodiments, this embodiment further specifies that the first clamping space formed by the two oppositely arranged first sub-clamping arms 321 is adapted to the outer diameter of the first pipe 10, the diameter of the first clamping space is smaller than the diameter of the second annular limiting part 114, and the second clamping space formed by the two oppositely arranged second sub-clamping arms 322 is adapted to the outer diameter of the second connector 21.

[0055] The above embodiment further defines a first clamping space formed by two opposing first sub-clamping arms 321, the shape and size of which match the outer diameter of the first pipe 10. Similarly, a second clamping space formed by two opposing second sub-clamping arms 322 matches the outer diameter of the second connector 21. When the elastic clamp 30 is tightened, the first sub-clamping arms 321 and 322 will correspondingly and tightly fit against the outer wall of the first pipe 10 and the outer wall of the second connector 21, allowing the radial locking force applied by the elastic clamp 30 to be evenly distributed across the entire contact surface, effectively avoiding localized stress concentration and thus providing stronger vibration resistance and tensile strength. Furthermore, because the diameter of the first clamping space is smaller than the diameter of the second annular limiting portion 114, the first sub-clamping arms 321 can prevent the first connector 11 from sliding out of the second connector 21.

[0056] It should be noted that the diameter of the first clamping space can be smaller than the diameter of the second clamping space. The size of the clamping space can be selected according to the diameter of the pipe. For example, if the diameter of the first pipe 10 is D1 and the diameter of the second pipe 20 is D2, and D1 is smaller than D2, then the diameter of the first clamping space formed by the two first sub-clamping arms 321 is smaller than the diameter of the second clamping space formed by the two second sub-clamping arms 322.

[0057] like Figure 2 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the connection between the second end of the first sub-clamping arm 321 and the second end of the second sub-clamping arm 322 is bent to form an operating part 323.

[0058] The above embodiment further specifies that the end connection between the first sub-clamping arm 321 and the second sub-clamping arm 322 is bent outward to form an operating part 323 that is radially opposite to the clamping space. That is, when the elastic clamp 30 forms a clamping space for clamping the pipe, its side away from the pipe is bent to form an operating part 323 for applying force by hand. This allows the user's fingers to apply force to the entire clamp very naturally and effortlessly when pinching the operating part 323 outward, thereby driving the connecting block 31 to undergo elastic deformation and allowing the inner clamping space to open smoothly.

[0059] In addition to the features of the above embodiments, this embodiment further specifies that: the first pipe 10 is also provided with a third connector, which is used to connect to the third pipe through another elastic clamp 30.

[0060] In addition to the features of the above embodiments, this embodiment further specifies that: the second pipe 20 is also provided with a fourth connector, which is used to connect to the fourth pipe through another elastic clamp 30.

[0061] This embodiment provides a heat pump unit, including any of the above-mentioned quick-connect pipe structures.

[0062] This application provides a heat pump unit that, by employing the aforementioned quick-connect pipe structure, eliminates the need for complex welding of the internal water pipes. Instead, simple plug-in connections and clamp tightening enable rapid connection. Furthermore, when any section of water pipe, valve, or sensor within the heat pump unit malfunctions, the quick-connect pipe structure allows for rapid location and partial replacement of the faulty component. This avoids the cumbersome operations of traditional solutions, which require extensive cutting, re-welding, or even disassembly of the entire unit, significantly reducing maintenance time and service costs.

[0063] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A quick-connect pipe structure, characterized in that, Includes a first pipe (10), a second pipe (20), and an elastic clamp (30); The first pipe (10) is provided with a first connector (11), and the second pipe (20) is provided with a second connector (21). The outer diameter of the first connector (11) is smaller than the inner diameter of the second connector (21), and the first connector (11) is embedded in the second connector (21). The second connector (21) has a first protrusion (211) on its surface. The elastic clamp (30) has a limiting groove (301) and the limiting groove (301) is fitted around the outer periphery of the first protrusion (211). The elastic clamp (30) is respectively attached to the surface of the first pipe (10) and the first protrusion (211).

2. The quick-connect pipe structure according to claim 1, characterized in that, A sealing ring (40) is provided in the gap between the first connector (11) and the second connector (21).

3. The quick-connect pipe structure according to claim 2, characterized in that, The first connector (11) has two spaced first annular limiting parts (112) on its surface, and the gap between the two first annular limiting parts (112) forms an assembly groove (113), and the sealing ring (40) is installed on the assembly groove (113).

4. A quick-connect pipe structure according to claim 3, characterized in that, The elastic clamp (30) includes a connecting block (31) and two arc-shaped clamping arms (32) connected to both sides of the connecting block (31). The arc-shaped clamping arms (32) fit against the surfaces of the first pipe (10) and the second connector (21), and the arc-shaped clamping arms (32) are provided with the limiting groove (301).

5. A quick-connect pipe structure according to claim 4, characterized in that, The second connector (21) has a first limiting platform (212) inside, and one of the first annular limiting parts (112) on the first connector (11) abuts against the first limiting platform (212).

6. A quick-connect pipe structure according to claim 5, characterized in that, The first connector (11) has a second annular limiting part (114) formed on the first limiting platform (212) on the side away from the first limiting platform (212).

7. A quick-connect pipe structure according to claim 6, characterized in that, The arc-shaped clamping arm (32) includes a first sub-clamping arm (321) and a second sub-clamping arm (322). The first end of the first sub-clamping arm (321) and the first end of the second sub-clamping arm (322) are respectively connected to the connecting block (31). The second end of the first sub-clamping arm (321) is connected to the second end of the second sub-clamping arm (322). The gap between the first sub-clamping arm (321) and the second sub-clamping arm (322) forms the limiting groove (301). The second connector (21) forms a second limiting platform (215) at the first protrusion (211). The second sub-clamping arm (322) abuts against the second limiting platform (215).

8. A quick-connect pipe structure according to claim 7, characterized in that, The first clamping space formed by the two opposing first sub-clamping arms (321) is adapted to the outer diameter of the first pipe (10), and the diameter of the first clamping space is smaller than the diameter of the second annular limiting part (114). The second clamping space formed by the two opposing second sub-clamping arms (322) is adapted to the outer diameter of the second connector (21).

9. A quick-connect pipe structure according to claim 7, characterized in that, The second end of the first sub-clamping arm (321) is bent at the connection point with the second end of the second sub-clamping arm (322) to form an operating part (323).

10. A heat pump unit, characterized in that, Including the quick-connect pipe structure as described in any one of claims 1-9 above.

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