Water backflow prevention structure of automobile air conditioner drain pipe

Abstract

The invention discloses an automobile air conditioner drain pipe water backflow prevention structure which comprises a water inlet and a water outlet, a one-way valve is connected between the water inlet and the water outlet and comprises a valve cavity, an ejector pin valve element is arranged in the valve cavity, and one end of the ejector pin valve element separates the water inlet and the valve cavity. The drainage pipe can be prevented from being blocked by external muddy water, normal use of the air conditioner is guaranteed, and the drainage pipe is convenient to install and reliable in sealing performance.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile air conditioners, and in particular to a waterproof backflow structure for a drainage pipe of an automobile air conditioner. Background Art

[0002] At present, the air conditioner in the car effectively provides a comfortable ambient temperature for the passenger compartment. The frequency of use of car air conditioners is relatively high in hot summer. Since the condensed water in the air conditioner needs to be discharged from the car, a drain pipe structure is designed in the air conditioner structure. However, the current air conditioner drain pipe structure is simply designed and has no waterproof backflow structure. The condensed water that is not discharged in time may flow back into the air conditioner box. In addition, during the car's wading driving, if the external muddy water blocks the water outlet of the drain pipe, it will not only affect the normal discharge of the air conditioner condensed water, but also easily cause water to flow back into the air conditioner box, causing abnormal operation or even damage of the air conditioner, affecting the riding comfort of the passengers.

[0003] The utility model patent with publication number CN205560031U was published on September 7, 2016, and is named as an air conditioning insulation drainage pipe, which is composed of an inner pipe body, an elastic filling layer wrapped around the pipe body and in the middle layer, and a protective sleeve wrapped around the elastic filling layer and in the outer layer; the pipe body is a two-layer structure, which is an inner waterproof membrane and an outer coil spring, and the coil springs are wound along the outer surface of the waterproof membrane and are tightly attached to each other. This air conditioning insulation drainage pipe also cannot solve the technical problems described above. Summary of the invention

[0004] The purpose of the present invention is to provide a car air-conditioning drainage pipe waterproof backflow structure that prevents external mud and water from blocking the drainage pipe, ensures normal use of the air conditioner, is easy to install, and has reliable sealing.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] The automobile air-conditioning drainage pipe waterproof backflow structure comprises a water inlet and a water outlet, wherein a one-way valve is connected between the water inlet and the water outlet, and the one-way valve comprises a valve cavity, wherein a thimble valve core is arranged in the valve cavity, and one end of the thimble valve core separates the water inlet and the valve cavity.

[0007] A platform is provided at one end of the ejector valve core close to the water inlet, the platform abuts against the inner wall of the one-way valve, and the platform separates the water inlet and the valve cavity; a drainage mesh is provided at one end of the one-way valve close to the water outlet, the other end of the ejector valve core passes through the drainage mesh, a spring is sleeved on the ejector valve core, and both ends of the spring abut against the platform and the drainage mesh respectively.

[0008] The two ends of the one-way valve are respectively provided with a first interface and a second interface, the first interface extends into the water inlet, and the second interface extends into the water outlet.

[0009] The first interface and the second interface are both provided with anti-falling undercuts, and the anti-falling undercuts are arranged at equal intervals.

[0010] The cross-sectional dimension of the valve cavity is larger than the cross-sectional dimension of the second interface.

[0011] The ends of the first interface and the second interface are both provided with bevels.

[0012] The drainage mesh is in an annular structure, and through holes are evenly distributed on the drainage mesh.

[0013] The first interface and the second interface are symmetrically arranged about the middle of the one-way valve.

[0014] The water inlet, the water outlet and the one-way valve are arranged coaxially

[0015] The technical effect of the present invention is as follows: the automobile air-conditioning drain pipe waterproof backflow structure of the present invention is adopted, and a one-way valve is used to play a one-way waterproof backflow role, preventing external mud and water from blocking the water outlet of the drain pipe when the automobile is wading, so that the condensed water in the air-conditioning box is discharged smoothly, and the condensed water and muddy water are effectively prevented from backflowing into the car, thereby ensuring the normal use of the air conditioner; the one-way valve has a simple structure, is easy to assemble, has high stability, and has reliable sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] This specification includes the following drawings, which show the following contents:

[0017] Figure 1 It is a schematic diagram of the assembly of the waterproof backflow structure of the automobile air-conditioning drainage pipe of the present invention;

[0018] Figure 2 It is a structural schematic diagram of the one-way valve of the present invention;

[0019] Figure 3 It is a schematic diagram of the drainage mesh structure of the present invention.

[0020] The markings in the figure are: 1. First interface; 2. Second interface; 3. One-way valve; 4. Valve chamber; 5. Ejector valve core; 6. Spring; 7. Drainage mesh; 8. Anti-fall-off undercut; 9. Platform; 10. Bevel. DETAILED DESCRIPTION

[0021] The specific implementation methods of the present invention are further explained in detail below by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention and facilitating their implementation.

[0022] like Figures 1 to 3As shown, the anti-backflow structure of the automobile air-conditioning drainage pipe includes a water inlet and a water outlet, a one-way valve 3 is connected between the water inlet and the water outlet, the one-way valve 3 includes a valve cavity 4, a thimble valve core 5 is arranged in the valve cavity 4, and one end of the thimble valve core 5 separates the water inlet and the valve cavity 4. The water inlet, the one-way valve 3 and the water outlet are installed from top to bottom, and the one-way passing principle of the one-way valve 3 is realized by the spring 6 and the thimble valve core 5, which satisfies the normal discharge of condensed water while preventing the backflow of condensed water / muddy water, avoiding abnormal operation or damage of the air conditioner due to the backflow of muddy water, ensuring the reliability of the air conditioner function, and thus ensuring the riding comfort of the passengers.

[0023] like Figures 1 to 3 As shown, a platform 9 is provided at one end of the ejector valve core 5 near the water inlet, and the platform 9 abuts against the inner wall of the one-way valve 3, and the platform 9 separates the water inlet and the valve cavity 4; a drainage mesh 7 is provided at one end of the one-way valve 3 near the water outlet, and the other end of the ejector valve core 5 passes through the drainage mesh 7. A spring 6 is sleeved on the ejector valve core 5, and the two ends of the spring 6 abut against the platform 9 and the drainage mesh 7 respectively. In the above structure, the spring 6 is in a compressed state, and the shortening of the spring 6 can only be achieved by the force of the platform 9. When the condensed water is discharged, the water pressure of the condensed water pushes the platform 9, so that the platform 9 is separated from the inner wall of the one-way valve 3, thereby forming a discharge path. In the case where there is no condensed water discharge, the platform 9 separates the channels of the water inlet and the water outlet under the pressure of the spring 6, so that the muddy water in the external environment or the condensed water that is not discharged from the water outlet in time cannot flow back into the water inlet pipe and the air conditioning box. Among them, the drainage mesh 7 does not affect the normal passage of condensed water, and can avoid the passage of excessive mud and sand when the car is wading.

[0024] like Figure 2 As shown, the first interface 1 and the second interface 2 are respectively provided at both ends of the one-way valve 3, the first interface 1 extends into the water inlet, and the second interface 2 extends into the water outlet. The connection between the above two interfaces and the water inlet or the water outlet adopts a snap-on form, which is simple and easy to install, and the interfaces at both ends of the one-way valve 3 are extended into the water inlet / water outlet, which have a contact fit for a distance, and the one-way valve 3 is not easy to loosen after installation.

[0025] like Figure 2 As shown, the first interface 1 and the second interface 2 are both provided with anti-dropping buckles 8, and the anti-dropping buckles 8 are arranged at equal intervals. The first interface 1 and the second interface 2 are both rubber interfaces. During the assembly process of the two with the one-way valve 3, the water inlet / outlet interface is fixed by the anti-dropping buckle 8. The anti-dropping buckle 8 and the water inlet or outlet form an interference fit and a barb structure, which is not only easy to assemble, but also improves the stability of the assembly, and also enhances the sealing effect of the above two structures in the assembly, and moisture from the external environment will not enter from the assembly gap of the above components.

[0026] like Figure 1 and Figure 2As shown, the cross-sectional dimension of the valve cavity 4 is larger than that of the second interface 2. The above structure expands the internal volume of the valve cavity 4, and when condensed water or muddy water enters the valve cavity 4 along the water outlet, a buffering effect is formed, further improving the waterproof backflow effect.

[0027] like Figure 2 As shown, the ends of the first interface 1 and the second interface 2 are both provided with an angle 10. The setting of the angle 10 facilitates the alignment installation process of the interface of the one-way valve 3 and the water inlet or outlet, and prevents the interface from being damaged due to contact.

[0028] like Figure 3 As shown, the drainage mesh 7 is annular in structure, and through holes are evenly distributed on the drainage mesh 7. The annular drainage mesh 7 can facilitate the passage of the ejector valve core 5, and its inner diameter is adapted to the outer diameter of the ejector valve core 5 to prevent muddy water from passing through the gap between the two, and the through holes are used for the normal discharge of condensed water.

[0029] like Figure 2 As shown, the first interface 1 and the second interface 2 are symmetrically arranged about the middle of the one-way valve 3. The one-way valve 3 is a symmetrical structure as a whole, and the two interfaces are mutually compatible. There is no need to consider positive and negative effects during assembly, which improves assembly efficiency, simplifies the processing and molding process of the one-way valve 3, and reduces production costs.

[0030] like Figure 1 As shown, the water inlet, the water outlet and the one-way valve 3 are coaxially arranged. The above structure is conducive to improving the stability of the pipeline, improving the connection quality, and reducing the difficulty of assembly.

[0031] The working principle of the anti-backflow structure of the automobile air-conditioning drainage pipe is as follows: when the automobile air-conditioning is turned on, the condensed water in the air-conditioning box flows from the first interface 1 to the one-way valve 3, and the ejector valve core 5 device is moved downward by water pressure, and then flows to the valve cavity 4, and is discharged through the drainage mesh 7 at the bottom of the valve cavity 4, and discharged to the second interface 2; on the contrary, if in the process of wading, in order to prevent the external muddy water from blocking the water outlet of the drainage pipe, when the muddy water enters the second interface 2, the external water pushes the drainage mesh 7 structure upward through the hydraulic thrust, and then through the ejector valve core 5 matching structure and the force of the spring 6, the ejector valve core 5 matching structure closes the upper end of the valve cavity 4. Thus, the external water is effectively prevented from backflowing into the air-conditioning box.

[0032] The automobile air-conditioning drainage pipe waterproof backflow structure plays a one-way waterproof backflow role through the use of the one-way valve 3, preventing external mud and water from blocking the water outlet of the drainage pipe when the automobile is wading, so that the condensed water in the air-conditioning box can be discharged smoothly, effectively preventing the condensed water and muddy water from backflowing into the car, and ensuring the normal use of the air conditioner; the one-way valve 3 has a simple structure, is easy to assemble, has high stability, and has reliable sealing performance.

[0033] The present invention is described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A waterproof backflow structure for automobile air-conditioning drainage pipe, characterized in that: The invention comprises a water inlet and a water outlet, wherein a one-way valve (3) is connected between the water inlet and the water outlet, and the one-way valve (3) comprises a valve cavity (4), wherein a thimble valve core (5) is arranged in the valve cavity (4), and one end of the thimble valve core (5) separates the water inlet and the valve cavity (4).

2. The automobile air-conditioning drainage pipe waterproof backflow structure according to claim 1, characterized in that: A platform (9) is provided at one end of the ejector valve core (5) close to the water inlet, the platform (9) abuts against the inner wall of the one-way valve (3), and the platform (9) separates the water inlet and the valve cavity (4); a drainage mesh hole (7) is provided at one end of the one-way valve (3) close to the water outlet, the other end of the ejector valve core (5) passes through the drainage mesh hole (7), and a spring (6) is sleeved on the ejector valve core (5), and two ends of the spring (6) abut against the platform (9) and the drainage mesh hole (7) respectively.

3. The anti-backflow structure for automobile air-conditioning drainage pipe according to claim 1 or 2, characterized in that: The one-way valve (3) is provided with a first interface (1) and a second interface (2) at both ends, respectively; the first interface (1) extends into the water inlet, and the second interface (2) extends into the water outlet.

4. The anti-backflow structure for automobile air-conditioning drainage pipe according to claim 3, characterized in that: Anti-dropping undercuts (8) are provided on both the first interface (1) and the second interface (2), and the anti-dropping undercuts (8) are arranged at equal intervals.

5. The anti-backflow structure for automobile air-conditioning drainage pipe according to claim 4, characterized in that: The cross-sectional dimension of the valve cavity (4) is greater than the cross-sectional dimension of the second interface (2).

6. The anti-backflow structure for automobile air-conditioning drainage pipe according to claim 3, characterized in that: The ends of the first interface (1) and the second interface (2) are both provided with bevel angles (10).

7. The anti-backflow structure for automobile air-conditioning drainage pipe according to claim 2, characterized in that: The drainage mesh (7) is in an annular structure, and through holes are evenly distributed on the drainage mesh (7).

8. The anti-backflow structure for automobile air-conditioning drainage pipe according to claim 6, characterized in that: The first interface (1) and the second interface (2) are symmetrically arranged with respect to the middle of the one-way valve (3).

9. The anti-backflow structure for automobile air-conditioning drainage pipe according to claim 1, characterized in that: The water inlet, the water outlet and the one-way valve (3) are coaxially arranged.

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