One-way valve for air conditioner drain pipe

Abstract

The one-way valve comprises a valve body, the valve body is axially provided with an upper channel, a water containing cavity and a lower channel which are sequentially communicated, a floating body is movably arranged in the water containing cavity, and when water flow enters the valve body from the lower end of the lower channel, the floating body can float upwards in the water containing cavity and block the upper end of the water containing cavity. A guide structure is arranged between the floating body and the valve body and used for restraining the floating body from moving up and down along the center line of the water containing cavity. The floating device has the advantages that when external fluid flows back to the water containing cavity through the lower channel, buoyancy of water can push the floating body to float upwards, the floating body moves upwards in a linear posture along the center line of the water containing cavity all the time under the constraint effect of the guiding structure, and therefore when the floating body floats upwards to the highest position, the upper end opening of the water containing cavity can be completely blocked, and the water containing cavity is prevented from being blocked. Therefore, external fluid is effectively prevented from flowing backwards into the automobile body, and the driving safety of the automobile is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile air conditioners, in particular to a one-way valve used for an air conditioner drain pipe. Background Art

[0002] In the automotive field, air conditioning systems are usually installed inside cars for the comfort of the users. When the air conditioner is turned on for cooling, the air conditioning system will condense the water vapor in the air into water droplets during the cooling process, and these water droplets will flow out from the drainage pipes at the bottom of the vehicle. However, when the vehicle is driving through a road section with deep water accumulation, the accumulated water will flow back into the car through the air conditioning drainage pipes, causing water to enter the car, affecting the driving and use safety of the car.

[0003] In order to solve the above problems, a Chinese patent document with publication number CN212377374U proposes a one-way valve, an air-conditioning dripping pipe and a vehicle, wherein the one-way valve is used to be arranged in the air-conditioning dripping pipe, the one-way valve has a receiving chamber, and a floating ball that can float up and down is arranged in the receiving chamber. When the accumulated water on the road reversely flows into the one-way valve from the outer end of the dripping pipe, the buoyancy of the fluid can lift the floating ball upward until the floating ball blocks the upper end through hole of the receiving chamber, and the fluid cannot reversely pass through the one-way valve into the vehicle. However, in the technical solution recorded in the patent document, the floating ball is fully movable and placed in an annular receiving chamber. After encountering water, the floating ball floats freely, and there is no linear constraint on the rising trajectory of the floating ball. During the floating process of the floating ball, it is easy to be lateral offset or deflected in the receiving chamber, and there is a technical defect of poor sealing when the floating ball reaches the highest position. Utility Model Content

[0004] In view of this, the utility model provides a one-way valve for an air-conditioning drain pipe, the purpose of which is to ensure that the float can float in the vertical direction and improve the water blocking and sealing effect.

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

[0006] A one-way valve for an air-conditioning drain pipe comprises a valve body, wherein the valve body is axially provided with an upper channel, a water containing chamber and a lower channel which are connected in sequence, a float is movably provided in the water containing chamber, and when water flows into the valve body from the lower end of the lower channel, the float can float up in the water containing chamber and seal the upper end of the water containing chamber. The key lies in that a guide structure is provided between the float and the valve body, and the guide structure is used to constrain the float to move up and down along the center line of the water containing chamber.

[0007] With the above structure, when external fluid flows back to the water containing chamber through the lower channel, the upward pressure of the fluid can push the float to float up. Under the constraint of the guide structure, the float can always move upward along the center line of the water containing chamber. Therefore, when the float floats to the highest position, it can completely block the upper port of the water containing chamber, thereby ensuring the sealing effect of the float to block water, thereby effectively preventing external fluid from flowing back into the vehicle body.

[0008] Preferably, the guide structure comprises an upper guide bracket fixedly supported at the lower part of the upper channel, an upper guide hole is provided in the middle of the upper guide bracket, and a first guide rod extending upward is provided at the upper end of the floating body, and the first guide rod is slidably matched with the upper guide hole. With the above structure, the guide bracket plays a guiding role for the floating body to float up, and can prevent the floating body from shifting and deflecting.

[0009] Preferably, the upper guide bracket has a middle annular portion and connecting plates arranged in an array around the middle annular portion, the connecting plates are integrally formed with the inner wall of the upper channel, and a water passage is provided between two adjacent connecting plates. The above structure is adopted to facilitate assembly.

[0010] Preferably, the guide structure comprises a lower guide bracket fixedly mounted on the upper part of the lower channel, a lower guide hole is provided in the middle of the lower guide bracket, a second guide rod extending downward is provided at the lower end of the float, and the second guide rod is slidably matched with the lower guide hole. The above structure further enhances the guiding function of the guide structure.

[0011] Preferably, the upper end of the lower guide bracket extends to the inside of the water chamber, and when the float is supported on the upper end of the lower guide bracket, there is a gap between the float and the lower channel. The above structure can prevent the float from blocking the lower channel when it falls due to gravity.

[0012] Preferably, the cross-sectional area of ​​the float is larger than the cross-sectional area of ​​the upper channel and smaller than the cross-sectional area of ​​the water containing cavity.

[0013] Preferably, the floating body comprises a cylindrical disk, the cylindrical disk is circumferentially covered with a plastic sleeve, and the plastic sleeve has edges located at the upper and lower ends of the cylindrical disk. With the above structure, the edge can improve the sealing effect of the floating body.

[0014] As a preference, the cylindrical disk has an annular groove in the circumference, and the annular groove is sealed in the plastic sleeve. The above structure can enhance the buoyancy of the floating body.

[0015] As a preferred embodiment, the valve body comprises a detachably connected upper valve body and a lower valve body, the upper channel is located at the upper part of the upper valve body, the lower channel is located at the lower part of the lower valve body, and the water containing cavity is surrounded by the space between the upper valve body and the lower valve body. The above structure is adopted to facilitate assembly.

[0016] Preferably, the valve body is integrally formed on the automobile air-conditioning drain pipe, or is connected to the automobile air-conditioning drain pipe in the form of a component.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. By adopting the one-way valve for the air-conditioning drain pipe provided by the utility model, when a vehicle passes through a flooded section, when the external accumulated water flows back to the water-containing chamber through the lower channel, the buoyancy of the water can push the float to float up. Under the constraint of the guide structure, the float always moves upward in a linear posture along the center line of the water-containing chamber, and the stability of the floating movement is good. Therefore, when the float floats to the highest position, it can completely block the upper port of the water-containing chamber, ensuring the sealing effect of the float to block water, thereby effectively preventing the external fluid from flowing back into the vehicle body and ensuring the driving safety of the vehicle.

[0019] 2. By setting up the lower guide bracket, not only can the guiding effect of the float be improved, but it can also ensure that the lower channel will not be blocked when the float falls under gravity, thereby ensuring that the condensed water of the car air conditioner can be discharged smoothly from the drain pipe.

[0020] 3. The one-way valve for the air conditioner drain pipe provided by the utility model can match the drain pipes of most car models, and has the advantages of simple structure, low cost and strong versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a one-way valve;

[0022] Figure 2 For along Figure 1 Sectional view of EE;

[0023] Figure 3 A three-dimensional cross-sectional view showing the internal structure of the one-way valve. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with embodiments and drawings.

[0025] like Figure 1 and 2As shown, a one-way valve for an air-conditioning drain pipe includes a valve body A, and the valve body A is axially provided with an upper channel 11, a water chamber 3 and a lower channel 21 that are connected in sequence. In this embodiment, the cross-sectional area of ​​the water chamber 3 is larger than the cross-sectional areas of the upper channel 11 and the lower channel 21. A float 4 is movably arranged in the water chamber 3, and the cross-sectional area of ​​the float 4 is smaller than the cross-sectional area of ​​the water chamber 3 and larger than the cross-sectional area of ​​the upper channel 11. When water flows into the valve body A from the lower end of the lower channel 21, the float 4 can float in the water chamber 3 and block the upper end of the water chamber 3. A guide structure 5 is provided between the float 4 and the valve body A, and the guide structure 5 can constrain the float 4 to move up and down along the center line of the water chamber 3.

[0026] In actual application, the one-way valve is arranged in a vertical posture on the automobile air-conditioning drain pipe. When the automobile passes through a water-crossing section, when the external fluid flows back to the water holding chamber 3 through the lower channel 21, the buoyancy provided by the fluid can push the float 4 to float up. Under the constraint of the guide structure 5, the float 4 can always move upward along the center line of the water holding chamber 3, and the stability of the floating movement is better. Therefore, when the float 4 floats to the highest position, it can completely block the upper port of the water holding chamber 3, ensuring the sealing effect of the float 4 in blocking water, thereby effectively preventing the external fluid from flowing back into the car body and ensuring the driving safety of the car.

[0027] For example Figure 2 and 3 As shown, to facilitate the production and assembly of the one-way valve, the valve body A includes a detachably connected upper valve body 1 and a lower valve body 2, wherein the upper channel 11 is located at the upper part of the upper valve body 1, the lower channel 21 is located at the lower part of the lower valve body 2, and the water chamber 3 is surrounded by the space between the upper valve body 1 and the lower valve body 2. In this embodiment, the upper valve body 1 and the lower valve body 2 are fixedly connected by buckling or threaded sealing.

[0028] Please refer to Figure 2 and 3 The guide structure 5 includes an upper guide bracket 51 fixedly supported at the lower part of the upper channel 11, and an upper guide hole a is provided in the middle of the upper guide bracket 51 and runs through the height direction thereof. A first guide rod 41 extending upward is provided at the upper end of the float 4, and the first guide rod 41 is slidably matched with the upper guide hole a, so that when the float 4 floats upward under the pressure of the fluid, it can move upward along the sliding direction of the first guide rod 41, thereby avoiding deflection and displacement of the float 4 during the floating process, and ensuring the blocking effect of the float 4.

[0029] Further, refer to Figure 2 and 3The upper guide bracket 51 has a middle annular portion 5a, and connecting plates 5b arranged in an array around the middle annular portion 5a. The connecting plates 5b are vertically arranged, and the connecting plates 5b are integrally formed with the inner wall of the upper channel 11. A water passage d is provided between two adjacent connecting plates 5b, thereby ensuring the normal discharge of air conditioning condensate water.

[0030] Further, if Figure 3 As shown, the guide structure 5 also includes a lower guide bracket 52 fixedly arranged on the upper part of the lower channel 21, and a lower guide hole b is provided in the middle of the lower guide bracket 52 to penetrate in the height direction, and a second guide rod 42 extending downward is provided at the lower end of the float 4, and the second guide rod 42 is slidably matched with the lower guide hole b. Such a design can enhance the reliability of the guide structure 5, further ensure that the up and down movement of the float 4 can be maintained on the center line of the water chamber 3, and improve the stability of the up and down movement of the float 4. In this embodiment, the design principle of the lower guide bracket 52 is the same as that of the upper guide bracket 51, which will not be repeated here.

[0031] Depend on Figure 2 and 3 It can be seen that the upper end of the lower guide bracket 52 extends upward to the inside of the water holding chamber 3. Considering this, when the float 4 falls due to gravity and is supported on the upper end of the lower guide bracket 52, there is a gap c between the float 4 and the lower channel 21. At this time, the float 4 will not block the lower channel 21, and the condensed water can flow out of the lower channel 21 through the gap c, effectively ensuring the normal discharge of the condensed water.

[0032] like Figure 2 and 3 As shown, the float 4 includes a cylindrical disk 4a, a first guide rod 41 is fixedly arranged at the upper end of the cylindrical disk 4a, and a second guide rod 42 is fixedly arranged at the lower end of the cylindrical disk 4a. The cylindrical disk 4a is circumferentially covered with a plastic sleeve 4b, and the plastic sleeve 4b has a rim 4b1 located at the upper and lower ends of the cylindrical disk 4a. With such a design, when the float 4 floats to the highest point, the rim 4b1 structure of the plastic sleeve 4b can be against the upper end of the water chamber 3, thereby improving the sealing performance of the float 4 and having the advantage of a good blocking effect.

[0033] The one-way valve provided in this embodiment has a simple structure and low cost, and its size can adapt to the drain pipes of most car models. When used, the valve body A can be integrally formed on the automobile air-conditioning drain pipe, or can be connected to the automobile air-conditioning drain pipe in the form of a component.

[0034] 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 one-way valve for an air conditioner drain pipe, comprising a valve body (A), wherein the valve body (A) is axially provided with an upper channel (11), a water containing chamber (3) and a lower channel (21) which are connected in sequence, wherein a float (4) is movably arranged in the water containing chamber (3), and when water flows into the valve body (A) from the lower end of the lower channel (21), the float (4) can float up in the water containing chamber (3) and block the upper end of the water containing chamber (3), wherein the one-way valve (A) is characterized in that: A guide structure (5) is provided between the float (4) and the valve body (A), and the guide structure (5) is used to constrain the float (4) to move up and down along the center line of the water-containing chamber (3).

2. The one-way valve for air conditioning drain pipe according to claim 1, characterized in that: The guide structure (5) comprises an upper guide bracket (51) fixedly supported at the lower part of the upper channel (11), an upper guide hole (a) is provided in the middle of the upper guide bracket (51), and a first guide rod (41) extending upward is provided at the upper end of the float (4), and the first guide rod (41) is slidably matched with the upper guide hole (a).

3. The one-way valve for air conditioning drain pipe according to claim 2, characterized in that: The upper guide bracket (51) comprises a middle annular portion (5a) and connecting plates (5b) arranged in an array and distributed in the circumferential direction of the middle annular portion (5a); the connecting plates (5b) are integrally formed with the inner wall of the upper channel (11); and a water passage (d) is provided between two adjacent connecting plates (5b).

4. The one-way valve for an air conditioner drain pipe according to claim 1 or 2, characterized in that: The guide structure (5) comprises a lower guide bracket (52) fixedly mounted on the upper part of the lower channel (21), a lower guide hole (b) being provided in the middle of the lower guide bracket (52), and a second guide rod (42) extending downward is provided at the lower end of the float (4), and the second guide rod (42) is slidably matched with the lower guide hole (b).

5. The one-way valve for air conditioning drain pipe according to claim 4, characterized in that: The upper end of the lower guide bracket (52) extends to the inside of the water containing chamber (3), and when the floating body (4) is supported on the upper end of the lower guide bracket (52), a gap (c) is provided between the floating body (4) and the lower channel (21).

6. The one-way valve for an air conditioner drain pipe according to claim 1, characterized in that: The cross-sectional area of ​​the floating body (4) is larger than the cross-sectional area of ​​the upper channel (11) and smaller than the cross-sectional area of ​​the water containing chamber (3).

7. The one-way valve for an air conditioner drain pipe according to claim 1, characterized in that: The floating body (4) comprises a cylindrical disk (4a), the cylindrical disk (4a) is circumferentially covered with a plastic sleeve (4b), and the plastic sleeve (4b) has edges (4b1) located at the upper and lower ends of the cylindrical disk (4a).

8. The one-way valve for an air conditioner drain pipe according to claim 7, characterized in that: The cylindrical disk (4a) has an annular groove (4a1) in the circumference, and the annular groove (4a1) is sealed in the plastic sleeve (4b).

9. The one-way valve for an air conditioner drain pipe according to claim 1, characterized in that: The valve body (A) comprises an upper valve body (1) and a lower valve body (2) which are detachably connected, the upper channel (11) is located at the upper part of the upper valve body (1), the lower channel (21) is located at the lower part of the lower valve body (2), and the water containing chamber (3) is surrounded by the space between the upper valve body (1) and the lower valve body (2) which are close to each other.

10. The one-way valve for an air conditioner drain pipe according to claim 1, characterized in that: The valve body (A) is integrally formed on the automobile air-conditioning drain pipe, or is connected to the automobile air-conditioning drain pipe in the form of a component.

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