Backward flowing prevention structure for drainage pipe of automobile air conditioner

Abstract

The utility model discloses an automobile air conditioner drainage pipe anti-backflow structure which comprises a drainage pipe section, a front drainage channel, a reverse flow blocking cavity and a rear drainage channel which are sequentially communicated are arranged in the drainage pipe section, a blocking ball is movably arranged in the reverse flow blocking cavity, and the density of the blocking ball is smaller than that of water. The diameter of the front drainage channel is smaller than that of the blocking ball, and after water flow enters the reverse flow blocking cavity from the rear drainage channel, the blocking ball can float upwards and block the front drainage channel. A support is arranged on the lower portion of the reverse flow blocking cavity and used for supporting a blocking ball falling under the action of gravity so as to prevent the blocking ball from blocking the rear drainage channel. The automobile air conditioner drain pipe has the advantages of being low in use cost, ingenious in design, capable of preventing the automobile air conditioner drain pipe from flowing backwards and avoiding safety problems.

Description

Technical Field

[0001] The utility model relates to automobile air-conditioning drainage pipe technology, in particular to an automobile air-conditioning drainage pipe backflow prevention structure. Background Art

[0002] When the car air conditioning system is in cooling working state, due to the low temperature of the evaporator core in the air conditioner, when the hot and humid air passes through, the water vapor in the air will form water droplets due to condensation, so the air conditioner needs to be equipped with a drain pipe to discharge the condensed water outside the car. The drain pipe is a necessary drainage structure in the car air conditioner. If there is no drain pipe, the condensed water will flow directly into the car, which will have a certain impact.

[0003] In the specific structural layout, the car air conditioning condensate drain pipe extends to the bottom of the car engine compartment, and the water outlet is exposed. When the vehicle passes through a serious wading section, the water outside the car can easily flow back into the air conditioning system or engine compartment through the drain pipe, causing vehicle failure and inducing safety problems. This problem is especially obvious for off-road vehicles that often wade through water and mud. Utility Model Content

[0004] In view of this, the utility model provides a backflow prevention structure for an automobile air-conditioning drainage pipe, aiming to solve the technical problem that water easily flows into the interior of the vehicle in reverse when the vehicle is wading.

[0005] To achieve the above purpose, the technical solution of the utility model is as follows:

[0006] A car air-conditioning drain pipe backflow prevention structure comprises a drain pipe section, wherein the drain pipe section is provided with a front drainage channel, a backflow blocking chamber and a rear drainage channel which are connected in sequence, a blocking ball is movably arranged in the backflow blocking chamber, the blocking ball has a density less than that of water, the front drainage channel has a diameter less than that of the blocking ball, and when water flows into the backflow blocking chamber from the rear drainage channel, the blocking ball can float up and block the front drainage channel.

[0007] A bracket is provided at the lower part of the backflow blocking chamber, and the bracket is used to support a blocking ball that falls due to gravity to prevent the blocking ball from blocking the rear drainage channel.

[0008] With the above structure, when the automobile air-conditioning drain pipe is draining normally, the bracket supports the blocker without affecting normal drainage. When sewage backflows, the blocking ball is affected by buoyancy to block the front drainage channel and prevent sewage from flowing into the interior of the vehicle body.

[0009] As a preferred embodiment, the blocking ball is made of PP material, and a flexible covering layer is provided on its surface. With the above structure, the blocking ball has a smooth surface, small obstruction, and low cost.

[0010] Preferably, the bracket includes a support portion located inside the backflow blocking chamber, and the support portion is circumferentially distributed with three support strips extending obliquely downward, and the lower end of each support strip extends to the side wall of the rear drainage channel. With the above structure, the blocking ball falls when the automobile air conditioner drain pipe drains water, and the bracket can prevent the blocking ball from blocking the rear drainage channel, leaving a large gap to ensure normal drainage of the automobile air conditioner.

[0011] As a preferred embodiment, the bracket is constructed as a triangular arch shape, and the lower end of each support bar extends to the transition position between the side wall of the rear drainage channel and the backflow blocking chamber. With the above structure, the arc surface allows the blocking ball to move smoothly with little obstruction.

[0012] Preferably, the diameter of the rear drainage channel is smaller than the diameter of the blocking ball, and the diameter of the backflow blocking chamber is larger than the diameter of the blocking ball. With the above structure, the blocking ball can move in the backflow blocking chamber to prevent sewage backflow while ensuring normal drainage of the automobile air conditioning drain pipe.

[0013] As a preferred embodiment, the drainage pipe section is connected to the automobile air conditioning drainage pipe in the form of a component; or, the drainage pipe section is integrally formed on the automobile air conditioning drainage pipe. The above structure is easy to install and can match the drainage pipe size of most existing models.

[0014] Preferably, the drainage pipe section includes an upper pipe section and a lower pipe section that are assembled and connected, the front drainage channel is located at the upper part of the upper pipe section, the rear drainage channel is located at the lower part of the lower pipe section, and the backflow blocking chamber is surrounded by the space where the upper pipe section and the lower pipe section are close to each other. The above structure is simple and low in cost.

[0015] As a preferred embodiment, the upper pipe section and the lower pipe section are connected by buckle joint or threaded sealing. With the above structure, it is convenient to set a blocking ball in the backflow blocking chamber to prevent water leakage inside the backflow blocking chamber.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The drainage pipe backflow prevention structure includes a front drainage channel, a backflow blocking chamber and a rear drainage channel. A blocking ball is movably arranged inside the backflow blocking chamber. When a vehicle passes through a flooded section, if water flows back into the drainage pipe section, the blocking ball will float up due to buoyancy and block the front drainage channel to prevent water from entering the interior of the vehicle body, thereby preventing damage to the air conditioner, vehicle failure, and safety issues.

[0018] 2. A bracket is provided at the bottom of the backflow blocking chamber to ensure that the blocking ball falling due to gravity will not block the rear drainage channel, thereby ensuring that the car air conditioner can discharge condensed water normally.

[0019] 3. It has the advantages of simple structure, good reliability and low cost, and can match the drain pipe size of most existing car models. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a cross-sectional view of the utility model;

[0021] Figure 2 A schematic diagram showing the bracket 32;

[0022] Figure 3 It is a schematic diagram of the overall structure of the utility model. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with embodiments and drawings.

[0024] like Figure 1 As shown, a backflow prevention structure of a car air-conditioning drainage pipe includes a drainage pipe section A, wherein a front drainage channel 1, a backflow blocking chamber 3 and a rear drainage channel 2 are sequentially connected inside the drainage pipe section A, and a blocking ball 31 is movably arranged in the backflow blocking chamber 3. The blocking ball 31 is made of PP material and has a flexible covering layer on the surface. The density of the blocking ball 31 is less than the density of water. The diameters of the front drainage channel 1 and the rear drainage channel 2 are both smaller than the diameter of the blocking ball 31, and the diameter of the backflow blocking chamber 3 is larger than the diameter of the blocking ball 31. Cars often pass through waterlogged areas during driving, especially off-road vehicles, which need to wade and immerse in water. Sewage can easily enter the interior of the car through the leakage section of the car air-conditioning drainage pipe, causing safety problems. The drainage pipe section A is installed or integrally formed on the exposed section of the air-conditioning drainage, and the drainage pipe section A is ensured to be in a vertical state. If water flows into the interior of the car through the drainage pipe section A, since the diameter of the front drainage channel 1 is smaller than the diameter of the blocking ball 31, the blocking ball 31 floats up due to the buoyancy and can block the front drainage channel 1, thereby preventing sewage from flowing into the interior of the car and playing a role in preventing backflow.

[0025] like Figure 1 and Figure 2 As shown, a bracket 32 ​​is provided at the lower part of the backflow blocking chamber 3. The bracket 32 ​​includes a support portion 322 located inside the backflow blocking chamber 3. The support portion 322 is circumferentially distributed with three support bars 321 extending obliquely downward. The lower end of each support bar 321 extends to the side wall of the rear drainage channel 2. The bracket 32 ​​is constructed as a triangular arch shape. The lower end of each support bar 321 extends to the transition position between the side wall of the rear drainage channel 2 and the backflow blocking chamber 3. The bracket 32 ​​occupies a small space and has little effect on the normal drainage of the air conditioning drain pipe. The bracket 32 ​​can prevent the blocking ball 31 from falling due to gravity and blocking the curved surface of the rear drainage channel 2, so that the blocking ball 31 moves smoothly with little obstruction.

[0026] like Figure 1 and Figure 3As shown, the drainage pipe section A includes an upper pipe section and a lower pipe section that are assembled and connected, the front drainage channel 1 is located at the upper part of the upper pipe section, the rear drainage channel 2 is located at the lower part of the lower pipe section, and the backflow blocking chamber 3 is surrounded by the space where the upper pipe section and the lower pipe section are close to each other. The upper pipe section and the lower pipe section are connected by buckle connection or threaded sealing, which is convenient for placing the blocking ball 31 and can match the size of most existing automobile air conditioning drainage pipes. The drainage pipe section A can be connected to the automobile air conditioning drainage pipe in the form of a component, or integrally formed on the automobile air conditioning drainage pipe.

[0027] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make a variety of similar expressions without violating the purpose and claims of the present invention, and such changes fall within the scope of protection of the present invention.

Claims

1. A backflow prevention structure for a car air-conditioning drainage pipe, comprising a drainage pipe section (A), characterized in that: The drainage pipe section (A) is provided with a front drainage channel (1), a backflow blocking chamber (3) and a rear drainage channel (2) which are connected in sequence. A blocking ball (31) is movably arranged in the backflow blocking chamber (3). The density of the blocking ball (31) is less than the density of water. The diameter of the front drainage channel (1) is smaller than the diameter of the blocking ball (31). When water flows from the rear drainage channel (2) into the backflow blocking chamber (3), the blocking ball (31) can float up and block the front drainage channel (1). A bracket (32) is provided at the lower part of the backflow blocking chamber (3), and the bracket (32) is used to support a blocking ball (31) that falls due to gravity, so as to prevent the blocking ball (31) from blocking the rear drainage channel (2).

2. The anti-backflow structure for automobile air-conditioning drainage pipe according to claim 1, characterized in that: The blocking ball (31) is made of PP material and has a flexible covering layer on its surface.

3. The anti-backflow structure of the automobile air-conditioning drainage pipe according to claim 1, characterized in that: The support (32) comprises a support portion (322) located inside the backflow blocking chamber (3), the support portion (322) being circumferentially distributed with three support bars (321) extending obliquely downward, the lower end of each support bar (321) extending to the side wall of the rear drainage channel (2).

4. The anti-backflow structure for automobile air-conditioning drainage pipe according to claim 3, characterized in that: The bracket (32) is constructed as a whole in a triangular arch shape, and the lower end of each support bar (321) extends to the transition position between the side wall of the rear drainage channel (2) and the backflow blocking chamber (3).

5. The anti-backflow structure for automobile air-conditioning drainage pipe according to claim 1, characterized in that: The diameter of the rear drainage channel (2) is smaller than the diameter of the blocking ball (31), and the diameter of the backflow blocking chamber (3) is larger than the diameter of the blocking ball (31).

6. The anti-backflow structure for automobile air-conditioning drainage pipe according to claim 1, characterized in that: The drainage pipe section (A) is connected to the automobile air-conditioning drainage pipe in the form of a component; Alternatively, the drainage pipe section (A) is integrally formed on the automobile air-conditioning drainage pipe.

7. The anti-backflow structure for automobile air-conditioning drainage pipe according to claim 1, characterized in that: The drainage pipe section (A) comprises an upper pipe section and a lower pipe section which are assembled and connected, the front drainage channel (1) is located at the upper part of the upper pipe section, the rear drainage channel (2) is located at the lower part of the lower pipe section, and the backflow blocking chamber (3) is surrounded by the space between the upper pipe section and the lower pipe section which are close to each other.

8. The anti-backflow structure for automobile air-conditioning drainage pipe according to claim 7, characterized in that: The upper pipe section and the lower pipe section are connected by buckling or thread sealing.

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