Air conditioner drain pipe anti-backflow structure

Abstract

The utility model discloses an air conditioner drain pipe anti -back flow structure, including first pipeline and second pipeline, and the device pipe is connected between first pipeline and second pipeline, the upper and lower both ends of device pipe are all the conical setting, and the middle part pipe well is greater than two end pipe diameter, and the inside storage of device pipe has the float ball, and the surface of float ball is provided with the composite fluorine rubber sealing layer, and the diameter of float ball is greater than the inside diameter of first pipeline, second pipeline, and the lower extreme of device pipe is provided with the bowl -shaped support, is provided with a plurality of through -going holes on the bowl -shaped support, through to the material innovation of float ball, guide rod, device pipe and filter screen's setting, systematic solution oil dirt card stagnation, buoyancy attenuation etc. Core problem, reduce the whole life cycle maintenance cost simultaneously.

Description

Technical Field

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

[0002] When an air conditioning system is in cooling mode, the evaporator core inside the unit is at a low temperature. As humid air passes through, the moisture in the air condenses and drips down. Therefore, an air conditioner needs a drain pipe to drain this condensate. The drain pipe is an essential drainage component in an air conditioner. Without it, the condensate would flow directly into the air conditioner, causing problems.

[0003] Utility model CN222663125U discloses an anti-backflow structure for automotive air conditioning drain pipes, including a drain pipe section. The drain pipe section contains a front drain channel, a backflow blocking chamber, and a rear drain channel connected sequentially. A blocking ball is movably disposed within the backflow blocking chamber. The density of the blocking ball is less than that of water, and the diameter of the front drain channel is smaller than the diameter of the blocking ball. When water flows into the backflow blocking chamber from the rear drain channel, the blocking ball floats up and blocks the front drain channel. A support is provided at the bottom of the backflow blocking chamber to support the blocking ball as it falls under gravity, preventing the blocking ball from blocking the rear drain channel. The beneficial effect of this utility model is that it uses a clever and inexpensive design to prevent backflow into the automotive air conditioning drain pipe, avoiding potential safety issues.

[0004] In the structure disclosed in the above utility model, the backflow prevention capability of the blocking ball relies on buoyancy. However, if the water contains impurities such as oil or mud, they may adhere to the surface of the blocking ball or get stuck at the contact surface between the ball and the front drainage channel, resulting in sealing failure. Summary of the Invention

[0005] The purpose of this utility model is to provide an anti-backflow structure for air conditioning drain pipes, so as to solve the problem mentioned in the background art that if the water contains impurities such as oil and mud, they may adhere to the surface of the blocking ball or get stuck at the contact surface between the ball and the front drainage channel, resulting in sealing failure.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an anti-backflow structure for an air conditioner drain pipe, comprising a first pipe and a second pipe, wherein a device pipe is connected between the first pipe and the second pipe, both ends of the device pipe are tapered, the middle pipe diameter is larger than the diameter of the two ends, a float ball is stored inside the device pipe, the surface of the float ball is provided with a composite fluororubber sealing layer, the diameter of the float ball is larger than the inner diameter of the first pipe and the second pipe, and a bowl-shaped support is provided at the lower end of the device pipe, the bowl-shaped support having several through holes.

[0007] Preferably, the float is made of hollow ceramic microspheres filled with PP material.

[0008] Preferably, the float is provided with a polytetrafluoroethylene guide rod.

[0009] Preferably, the inner wall of the second pipe is coated with a nano-hydrophobic coating.

[0010] Preferably, a counterweight is provided at the bottom of the second pipe. The counterweight is made of metal and runs through the pipe from top to bottom.

[0011] Preferably, the bottom of the counterweight is provided with a filter screen, which is made of stainless steel and has filter holes with a diameter larger than that of the through holes.

[0012] Preferably, the bottom of the counterweight is threaded with a retaining ring, and the bottom edge of the retaining ring is in contact with the filter screen.

[0013] The beneficial effects of this utility model are: In this invention, the tapered design of the device tube allows the upper tapered section to precisely guide the float to block the first pipe, while the lower tapered section accelerates the drainage flow and prevents water accumulation. The bowl-shaped bracket and through-hole provide support for the float's descent, preventing it from completely blocking the second pipe while allowing water flow. A composite fluororubber sealing layer on the float significantly improves the oil resistance of the contact surface between the float and the first pipe, preventing seal failure due to oil contamination. Furthermore, the combination of the float, device tube, and bracket achieves double sealing and impurity interception, effectively preventing backflow caused by the drain pipe contacting the external water surface. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of an anti-backflow structure for an air conditioner drain pipe proposed in this utility model; Figure 2 This is a side view of an anti-backflow structure for an air conditioner drain pipe proposed in this utility model. Figure 3 This is a front cross-sectional view of an anti-backflow structure for an air conditioner drain pipe proposed in this utility model. Figure 4 This is a schematic diagram of the support and float of an air conditioner drain pipe anti-backflow structure proposed in this utility model.

[0015] In the diagram: 1. First pipe; 2. Second pipe; 3. Device pipe; 4. Float; 5. Support; 6. Through hole; 7. Counterweight; 8. Filter screen; 9. Fixing ring; 10. Guide rod. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] Reference Figure 1-4 An anti-backflow structure for an air conditioner drain pipe includes a first pipe 1 and a second pipe 2. A device pipe 3 is connected between the first pipe 1 and the second pipe 2. Both the upper and lower ends of the device pipe 3 are tapered, and the diameter of the middle pipe is larger than that of the two ends. A float ball 4 is stored inside the device pipe 3. The surface of the float ball 4 is covered with a composite fluororubber sealing layer. The diameter of the float ball 4 is larger than the inner diameter of the first pipe 1 and the second pipe 2. A bowl-shaped support 5 is provided at the lower end of the device pipe 3. Several through holes 6 are opened on the bowl-shaped support 5.

[0018] In this design, the tapered design of the device tube 3 allows the upper tapered section to guide the float 4 to precisely block the first pipe 1, while the lower tapered section accelerates the drainage flow and prevents water accumulation. The bowl-shaped bracket 5 and the through hole 6 provide support for the float 4's descent, preventing it from completely blocking the second pipe 2 while allowing water flow. The composite fluororubber sealing layer on the float 4 significantly improves the oil resistance of the contact surface between the float 4 and the first pipe 1, preventing seal failure due to oil contamination. Simultaneously, the cooperation of the float 4, device tube 3, and bracket 5 achieves double sealing and impurity interception, effectively preventing backflow caused by the drain pipe contacting the external water surface.

[0019] Specifically, in this embodiment, the float 4 is made of hollow ceramic microspheres filled with PP material. The ceramic microsphere material can effectively reduce the overall density of the float 4, reduce the water absorption rate during immersion, and thus improve the buoyancy stability of the float 4.

[0020] Specifically, in this embodiment, the float 4 is equipped with a polytetrafluoroethylene guide rod 10. The material of the guide rod 10 is selected to have a low coefficient of friction, thereby ensuring that the float 4 moves vertically within the device tube 3 and cooperates with the top opening of the device tube 3 to limit horizontal displacement.

[0021] Specifically, in this embodiment, the inner wall of the second pipe 2 is coated with a nano-hydrophobic coating. The nano-hydrophobic coating is mainly sprayed on the transition section from the inlet of the second pipe 2 to the device pipe 3, thereby reducing the adhesion of scale and oil on the inner wall of the second pipe 2 through the coating properties, and avoiding the impact of impurity accumulation on the float resetting.

[0022] Specifically, in this embodiment, a counterweight 7 is provided at the bottom end of the second pipe 2. The counterweight 7 is made of metal and runs vertically through the pipe. The high density of the counterweight increases the weight at the end of the second pipe 2, keeping the structure vertical and preventing the float 4 from failing to seal accurately when the pipe is tilted, thus further improving the sealing stability.

[0023] Specifically, in this embodiment, a filter screen 8 is provided at the bottom of the counterweight 7. The filter screen 8 is made of stainless steel, and the diameter of its filter holes is larger than the diameter of the through hole 6. The filter screen 8 can effectively intercept large particles such as leaves and sand, while allowing water to flow through quickly.

[0024] Specifically, in this embodiment, a retaining ring 9 is threadedly connected to the bottom of the counterweight 7, and the bottom edge of the retaining ring 9 contacts the filter screen 8. The retaining ring 9 enables quick assembly and disassembly of the filter screen 8, facilitating its maintenance.

[0025] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. An anti-backflow structure for an air conditioner drain pipe, comprising a first pipe (1) and a second pipe (2), characterized in that: A device tube (3) is connected between the first pipe (1) and the second pipe (2). Both ends of the device tube (3) are tapered, and the diameter of the middle pipe is larger than that of the two ends. A float (4) is stored inside the device tube (3). A composite fluororubber sealing layer is provided on the surface of the float (4). The diameter of the float (4) is larger than the inner diameter of the first pipe (1) and the second pipe (2). A bowl-shaped support (5) is provided at the lower end of the device tube (3). Several through holes (6) are opened on the bowl-shaped support (5).

2. The anti-backflow structure for an air conditioner drain pipe according to claim 1, characterized in that: The float (4) is made of hollow ceramic microspheres filled with PP material.

3. The anti-backflow structure for an air conditioner drain pipe according to claim 2, characterized in that: The top of the float (4) is provided with a polytetrafluoroethylene guide rod (10).

4. The anti-backflow structure for an air conditioner drain pipe according to claim 3, characterized in that: The inner wall of the second pipe (2) is coated with a nano-hydrophobic coating.

5. The anti-backflow structure for an air conditioner drain pipe according to claim 1, characterized in that: The bottom end of the second pipe (2) is provided with a counterweight (7), which is made of metal and runs through the top and bottom.

6. The anti-backflow structure for an air conditioner drain pipe according to claim 5, characterized in that: The bottom of the counterweight (7) is provided with a filter screen (8), which is made of stainless steel and has a filter hole diameter larger than the diameter of the through hole (6).

7. The anti-backflow structure for an air conditioner drain pipe according to claim 6, characterized in that: The bottom of the counterweight (7) is threaded with a fixing ring (9), and the bottom edge of the fixing ring (9) is in contact with the filter screen (8).

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