Water-gas separation check valve device and method for forecabin trim cover

Abstract

The invention belongs to the technical field of automobile manufacturing, and relates to a water-gas separation check valve device and method for a forecabin trim cover. The gutter channel comprises a gutter channel body, a check valve baffle and a locking spring, a water outlet is formed in the gutter channel body, the check valve baffle is movably connected with the gutter channel body, the gutter channel body is further connected with the check valve baffle through the locking spring, the gutter channel body is used for collecting and guiding water flow, the check valve baffle is located on the water outlet, and the gutter channel body is connected with the check valve baffle through the locking spring. The check valve baffle is used for preventing waste gas from entering the gutter channel body. The locking spring enables the check valve baffle to be tightly attached to the water outlet. The locking spring can provide continuous elastic force, it is ensured that the check valve baffle tightly closes the drainage port when no water flow exists, waste gas or small particles or dust is prevented from invading the gutter channel body, meanwhile, when the water pressure in the gutter channel body is increased, the check valve baffle is pushed open to achieve drainage, and when the pressure in the gutter channel body is reduced, the check valve baffle automatically resets. The water-gas separation function is also realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of automobile manufacturing, and relates to a water and gas separation check valve device and method for a front cabin decorative cover. Background Art

[0002] With the rapid development of technologies in the electric vehicle field in recent years, the trend of electric vehicles replacing fuel vehicles has become increasingly obvious. At present, there are generally two design ideas for the front cabin drainage structure of electric vehicles. The first design idea is the same as that of fuel vehicles, where a water trough sheet metal is arranged at the lower side of the front windshield in the front cabin, and the water flowing into the front cabin is discharged outside the vehicle through the water trough sheet metal. The second design idea is to cancel the water trough sheet metal in the front cabin and achieve drainage by optimizing the structure of the lower decorative plate of the front windshield.

[0003] On the other hand, the air intake of the air conditioner is generally also arranged in the front cabin. The requirement for the external circulation air intake of the air conditioner is to draw in fresh external air. For vehicles with engines such as gasoline vehicles, plug-in hybrid vehicles, and range-extended vehicles, waste gas and odors will be released during the combustion process of the engine in the front cabin. Therefore, the air intake of the air conditioner needs to be isolated from the front cabin to ensure that the waste gas in the front cabin is not sucked into the air conditioner.

[0004] Currently, the general solution is to arrange the air intake of the air conditioner in the water trough sheet metal. The water trough area can be completely isolated from the front cabin. The water flows out of the vehicle through the leakage holes on both sides of the water trough, while the air intake of the air conditioner draws in fresh external air through the air intake in the water trough area. However, for some vehicle models, due to factors such as platform layout and styling design, the space in the front cabin is limited, and the solution of the water trough sheet metal is often difficult to implement.

[0005] Therefore, for vehicle models that cannot be equipped with a water trough sheet metal, there is a problem of how to isolate the drainage or air intake in the front cabin. Summary of the Invention

[0006] The purpose of the present invention is to provide a water and gas separation check valve device and method for a front cabin decorative cover to solve the technical problem of how to isolate the drainage or air intake in the front cabin for vehicle models that cannot be equipped with a water trough sheet metal. The present invention can achieve the isolation of the drainage or air intake in the front cabin.

[0007] To achieve the above purpose, the present invention adopts the following technical solutions: The present invention discloses a water and gas separation check valve device for a front cabin decorative cover, including: A water trough body, on which a drainage port is provided; A check valve baffle, which is movably connected to the water trough body and is located on the drainage port; The locking spring, the water chute body and the check valve baffle are also connected by the locking spring, and the locking spring makes the check valve baffle closely adhere to the drain opening.

[0008] Furthermore, the water chute body has an angle with the horizontal direction.

[0009] Furthermore, the angle is greater than or equal to 5°.

[0010] Furthermore, two connecting seats are provided on the water chute body, the two connecting seats are located at the top of the drain opening, the check valve baffle is movably connected to the two connecting seats through a shaft pin, and the check valve baffle is located between the two connecting seats.

[0011] Furthermore, first installation openings are formed on both of the two connecting seats, and the shaft pin is movably inserted into the first installation openings; A second installation opening is formed on the check valve baffle, and the shaft pin is embedded in the second installation opening.

[0012] Furthermore, the check valve baffle adopts a soft rubber structure.

[0013] Furthermore, a sealing sponge is provided on the check valve baffle, and the sealing sponge is located between the check valve baffle and the drain opening.

[0014] Furthermore, the check valve baffle is located between the drain opening and the locking spring, the locking spring includes a spiral part and two straight parts, one of the straight parts is fixedly connected to the check valve baffle, and the other straight part is fixedly connected to the water chute body.

[0015] Furthermore, the locking force of the locking spring is greater than the first resultant force and less than the second resultant force, specifically as follows:

[0016] Among them, the is the first resultant force, is the locking force of the locking spring, is the second resultant force; The first resultant force is specifically as follows:

[0017] Among them, is the inertial force of the check valve baffle, is the gravity of the check valve baffle, is the included angle between the direction of the gravity of the check valve baffle and the inertial force of the check valve baffle; The second resultant force is specifically as follows:

[0018] Wherein, is the gravity of the maximum accumulated water volume allowed in the water chute body, is the inertia force of the maximum accumulated water volume allowed in the water chute body.

[0019] Based on the above structure, the present invention also discloses a working method of a water and gas separation check valve device for a front cabin decorative cover, including the following steps: When the water chute body does not need to drain water, the locking spring makes the check valve baffle closely adhere to the drain opening; When there is water accumulation in the water chute body, under the pushing action of the accumulated water, the check valve baffle opens the drain opening to achieve drainage.

[0020] Compared with the prior art, the present invention has the following beneficial effects: The water chute body of the present invention is used to collect and guide water flow. The check valve baffle is located on the drain opening, and the check valve baffle is used to prevent exhaust gas from entering the water chute body. The locking spring makes the check valve baffle closely adhere to the drain opening. The locking spring can provide continuous elastic force to ensure that the check valve baffle tightly closes the drain opening when there is no water flow, preventing exhaust gas, fine particles or dust from invading the water chute body. At the same time, when the internal water pressure of the water chute body increases, the check valve baffle is pushed open to achieve drainage, and when the internal pressure of the water chute body decreases, the check valve baffle automatically resets, having both the functions of water and gas separation.

[0021] The water chute body of the present invention has an included angle with the horizontal direction, which is convenient for the water flow to drain from the water chute body.

[0022] The check valve baffle of the present invention adopts a soft rubber structure, which is beneficial to improving the sealing performance between the check valve baffle and the drain opening and preventing exhaust gas from entering the water chute body. The check valve baffle of the present invention is provided with a sealing sponge, and the sealing sponge is located between the check valve baffle and the drain opening. The setting of the sealing sponge further improves the sealing performance between the check valve baffle and the drain opening and is beneficial to preventing exhaust gas from entering the water chute body.

[0023] The locking force of the locking spring of the present invention is greater than the first resultant force and less than the second resultant force. Through the setting of the first resultant force and the second resultant force, it is prevented that the baffle is accidentally opened due to the fluctuation of the inertia force / gravity, and at the same time, it is ensured that the accumulated water pressure is sufficient to push open the baffle to avoid drainage blockage.

[0024] In the method of the present invention, when the water chute body does not need to drain water, the locking spring makes the check valve baffle closely adhere to the drain opening to prevent exhaust gas, fine particles or dust from invading the water chute body; when there is water accumulation in the water chute body, under the pushing action of the accumulated water, the check valve baffle opens the drain opening to achieve drainage and prevent excessive water accumulation from entering the air conditioning port. Brief Description of the Drawings

[0025] Figure 1 is a schematic diagram of the check valve structure for water and gas separation of the front cabin decorative cover according to an embodiment of the present invention; Figure 2 is an exploded view of the check valve structure for water and gas separation of the front cabin decorative cover according to an embodiment of the present invention; Figure 3 is a sectional view of the check valve structure for water and gas separation of the front cabin decorative cover according to an embodiment of the present invention; Figure 4 is a schematic diagram of the structure of the water trough body according to an embodiment of the present invention; Figure 5 is a flowchart of the method according to an embodiment of the present invention.

[0026] Wherein: 1. Water trough body; 11. Drainage port; 12. First installation opening; 13. Connecting seat; 14. First U-shaped groove; 2. Check valve assembly; 21. Axle pin; 22. Sealing sponge; 23. Locking spring; 24. Check valve baffle; 25. Second installation opening; 26. Spiral part; 27. Straight part; 28. Second U-shaped groove. Detailed Description of the Embodiment

[0027] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] It should be noted that the terms "first", "second", etc. in the specification and the above-mentioned drawings of the present invention are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances, so that the embodiments of the present invention described herein can be implemented in an order different from those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0029] The present invention will be further described in detail below with reference to the accompanying drawings: See Figure 1 and Figure 2, the present invention discloses a water and gas separation check valve device for a front cabin decorative cover, comprising: a water trough body 1, a check valve baffle 24, and a locking spring 23; See Figure 2 , a drain port 11 is provided on the water trough body 1, and the water trough body 1 is used to collect and guide water flow, such as rainwater or condensate, and the water flow finally discharges from the drain port 11.

[0030] See Figure 1 , the check valve baffle 24 is movably connected to the water trough body 1, the check valve baffle 24 is located on the drain port 11, and the check valve baffle 24 is used to prevent exhaust gas from entering the water trough body 1.

[0031] See Figure 3 , the water trough body 1 and the check valve baffle 24 are also connected by a locking spring 23, and the locking spring 23 makes the check valve baffle 24 closely adhere to the drain port 11. The locking spring 23 can provide continuous elastic force to ensure that the check valve baffle 24 tightly closes the drain port 11 when there is no water flow, preventing exhaust gas, fine particles or dust from invading the water trough body 1. At the same time, when the internal water pressure of the water trough body 1 increases, the check valve baffle 24 is pushed open to achieve drainage; when the pressure in the water trough body 1 decreases, the check valve baffle 24 automatically resets, having the function of water and gas separation.

[0032] Embodiment 1: See Figure 1 , this embodiment discloses a water and gas separation check valve device for a front cabin decorative cover, comprising: a water trough body 1, a check valve baffle 24, and a locking spring 23; See Figure 4 , a drain port 11 is provided on the water trough body 1; See Figure 1 , the check valve baffle 24 is movably connected to the water trough body 1, and the check valve baffle 24 is located on the drain port 11; See Figure 3 , the water trough body 1 and the check valve baffle 24 are also connected by a locking spring 23, and the locking spring 23 makes the check valve baffle 24 closely adhere to the drain port 11.

[0033] Preferably, the water trough body 1 has an angle with the horizontal direction to facilitate the discharge of water flow from the water trough body 1.

[0034] Preferably, the angle is greater than or equal to 5°.

[0035] Preferably, two connecting seats 13 are provided on the water chute body 1. The two connecting seats 13 are located at the top of the drain opening 11. The check valve baffle 24 is movably connected to the two connecting seats 13 through a pin 21, and the check valve baffle 24 is located between the two connecting seats 13.

[0036] Preferably, first mounting openings 12 are formed on both of the two connecting seats 13, and the pin 21 is movably inserted into the first mounting openings 12; A second mounting opening 25 is formed on the check valve baffle 24, and the pin 21 is embedded in the second mounting opening 25.

[0037] Preferably, the check valve baffle 24 is made of a soft rubber structure, which is beneficial to improving the sealing performance between the check valve baffle 24 and the drain opening 11, and is beneficial to preventing waste gas from entering the water chute body 1.

[0038] Preferably, a sealing sponge 22 is provided on the check valve baffle 24. The sealing sponge 22 is located between the check valve baffle 24 and the drain opening 11. The setting of the sealing sponge 22 further improves the sealing performance between the check valve baffle 24 and the drain opening 11, and is beneficial to preventing waste gas from entering the water chute body 1.

[0039] Preferably, the check valve baffle 24 is located between the drain opening 11 and the locking spring 23. The locking spring 23 includes a spiral part 26 and two straight parts 27. One of the straight parts 27 is fixedly connected to the check valve baffle 24, and the other straight part 27 is fixedly connected to the water chute body 1.

[0040] Preferably, the locking force of the locking spring 23 is greater than the first resultant force and less than the second resultant force, specifically as follows:

[0041] Among them, the is the first resultant force, is the locking force of the locking spring 23, is the second resultant force; The first resultant force is specifically as follows:

[0042] Among them, is the inertial force of the check valve baffle 24, is the gravity of the check valve baffle 24, is the included angle between the direction of the gravity of the check valve baffle 24 and the inertial force of the check valve baffle 24; Among them, the inertial force of the check valve baffle 24 is obtained by multiplying the check valve baffle 24 by the vehicle acceleration, and the vehicle acceleration needs to be set according to the vehicle working conditions.

[0043] The specific situation of the second resultant force is as follows:

[0044] Among them, is the gravity of the maximum accumulated water volume allowed in the water chute body 1, is the inertial force of the maximum accumulated water volume allowed in the water chute body 1.

[0045] Among them, the inertial force of the maximum accumulated water volume allowed in the water chute body 1 is obtained by the product of the mass of the maximum accumulated water volume and the vehicle acceleration, and the vehicle acceleration needs to be set according to the vehicle working conditions.

[0046] Due to special working conditions such as uphill and downhill of the vehicle, the values of the first resultant force and the value less than the second resultant force can be adjusted within a small range according to the actual situation. The settings of the first resultant force and the second resultant force prevent the baffle from accidentally opening due to the fluctuation of inertial force / gravity. At the same time, it ensures that the accumulated water pressure is sufficient to push open the baffle to avoid drainage blockage.

[0047] Based on the above structure, the present invention also discloses a working method of a water and gas separation check valve device for a front cabin decorative cover. Refer to Figure 5 , including the following steps: S1. When the water chute body 1 does not need to drain water, the locking spring 23 makes the check valve baffle 24 closely adhere to the drain port 11 to prevent exhaust gas, fine particles or dust from invading the water chute body 1; S2. When there is accumulated water in the water chute body 1, under the pushing action of the accumulated water, the check valve baffle 24 opens the drain port 11 to achieve drainage and prevent excessive accumulated water from entering the air conditioning port.

[0048] Embodiment 2: Refer to Figure 1 , this embodiment discloses a water and gas separation check valve device for a front cabin decorative cover, including a water chute body 1 and a check valve assembly 2. Among them, the check valve assembly 2 includes a shaft pin 21, a sealing sponge 22, a locking spring 23, and a check valve baffle 24.

[0049] The water chute body 1 is mostly formed by injection molding process. The specific material can be selected according to the usage conditions. If there are no special requirements, PP-T20 material is mostly used. If the usage temperature is relatively high, or there are strength requirements for the water chute body 1, materials such as PA6+GF30 can be selected. Installation openings for the check valve assembly 2 need to be reserved on the water chute body 1. The shaft pin 21 is generally cylindrical in shape and is mostly formed by injection molding process. The specific material can be selected according to the usage conditions. If there are no special requirements, PP-T20 material is mostly used. If the usage temperature is relatively high, or there are strength requirements for the water chute body, materials such as PA6+GF30 can be selected. The sealing sponge 22 is mostly formed by foaming process. The specific material can be selected according to the usage conditions. If there are no special requirements, EPDM material is mostly used. If there are certain odor requirements, materials such as PU can be selected. The locking spring 23 needs to include a helical part and a straight part and is mostly formed by winding process, and spring steel material is mostly used. The check valve baffle 24 is mostly formed by injection molding process. The specific material can be selected according to the usage conditions. If there are no special requirements, PP-T20 material is mostly used. If the usage temperature is relatively high, or there are strength requirements for the water chute body 1, materials such as PA6+GF30 can be selected. A second installation opening 25 for the shaft pin 21 needs to be reserved on the check valve baffle 24.

[0050] See Figure 1 , first, the locking spring 23 is sleeved on the shaft pin 21, and then the shaft pin 21 is inserted into the second installation opening 25 on the check valve baffle 24. The diameter of the shaft pin 21 should be slightly larger than the diameter of the second installation opening 25. An interference fit is adopted between the shaft pin 21 and the second installation opening 25 so that the shaft pin 21 does not rotate or rotates less during use. During the assembly process, the locking spring 23 needs to be rotated so that a straight part 27 of the locking spring 23 is snapped into the corresponding second U-shaped groove 28 of the check valve baffle 24, thereby ensuring that the locking spring 23 is in a fixed state. The sealing sponge 22 is fixed to the check valve baffle 24 by an adhesive process. After the check valve assembly 2 is assembled, the shaft pin 21 is then snapped into the corresponding installation opening of the water chute body 1. After the assembly is in place, the other straight part 27 of the locking spring 23 should be snapped into the corresponding first U-shaped groove 14 of the water chute body 1.

[0051] See Figure 3, the check valve baffle 24 and the water chute body 1 adopt a zero-fit, and the sealing sponge 22 and the water chute body 1 adopt an interference fit. The sealing sponge 22 is compressed under the locking force of the locking spring 23, so as to ensure that the water chute body 1 and the check valve assembly 2 are in a sealed state. If the airtightness requirement in the air inlet area of the air conditioner is relatively high, the check valve baffle can adopt a two-color injection molding process. The matching area between the check valve baffle 24 and the water chute body 1 adopts a soft rubber structure, and an interference fit is adopted between the check valve baffle 24 and the water chute body 1, which can further improve the sealing performance of the check valve.

[0052] During normal use, when water flows into the water chute body 1, when the water flow velocity is relatively large, the water flow impact force is greater than the locking force of the locking spring 23 , the check valve baffle 24 opens, and the water flows out normally to complete drainage. Among them, the water flow impact force is the above-mentioned second resultant force; after the water flow velocity slows down, the water flow impact force is less than the locking force of the locking spring 23 , the check valve baffle 24 closes and returns to the sealed state.

[0053] In order to improve the drainage performance, the inclination angle of the water chute body 1 can be appropriately increased. Generally, it is recommended that the angle between the water chute body 1 and the horizontal direction is greater than or equal to 5°. After the inclination angle of the water chute body 1 is increased, when the water flow velocity slows down, the accumulated water flow in the area of the check valve baffle 24 will increase correspondingly, and the water flow gravity is greater than the locking force of the locking spring 23 , the check valve baffle 24 opens, and the water flows out normally to complete drainage.

[0054] The design of the locking force of the locking spring 23 is the core of the design of this structure. If the locking force is too large, it is easy to cause that during the normal use of the customer, although there is water flowing into the water chute body 1, the water flow impact force is still less than the locking force of the locking spring 23 , which will lead to the inability of the water flow to be discharged in time. If the locking force is too small, the first resultant force is greater than the locking force of the locking spring 23 , then the check valve baffle 24 will open, resulting in the inhalation of the front cabin exhaust gas into the air intake hole of the air conditioner. Among them, the first resultant force is the resultant force of the inertial force caused by the acceleration during the vehicle operation and the self-gravity of the check valve baffle 24 .

[0055] To ensure the locking force of the locking spring 23 The design meets the requirements, and generally needs to pass CAE calculations and physical verification.

[0056] To prevent the locking force of the locking spring 23 from being too small, in terms of CAE calculation, first, data such as vibration acceleration and vibration frequency need to be obtained from relevant departments, and the inertial force caused by the acceleration during vehicle operation is calculated through calculation , the self-weight of the check valve baffle 24 is related to the weight of the check valve baffle 24, and the inertial force and the self-weight generally have a certain included angle α between them; Among them, the first resultant force is specifically as follows:

[0057] The locking force of the locking spring 23 The result of CAE calculation needs to be greater than the calculated value of the resultant force .

[0058] In terms of physical verification, DV verification can be carried out after the tooling parts are presented. The verification method is generally to fix the parts on the bench in the vehicle state to make it in the normal use state, and then fix it on the vibration table, and conduct tests according to the vibration acceleration and vibration frequency obtained from relevant departments. Generally, the vibration periods in the X, Y, and Z directions need to be set. During and after the test, the check valve baffle 24 needs to be sealed with the water chute body 1, and this result can be obtained through the airtightness test activity.

[0059] To prevent the locking force of the locking spring 23 from being too large, in terms of CAE calculation, first, the flow velocity of the water flowing into the water chute body 1 and the water volume corresponding to the maximum accumulated water level allowed by the boundary conditions need to be analyzed according to the operating conditions. The water flow impact force is the resultant force of the gravity of the water volume corresponding to the maximum accumulated water level allowed by the boundary conditions and the inertial force of the water volume corresponding to the maximum accumulated water level allowed by the boundary conditions. The locking force of the locking spring 23 The result of CAE calculation needs to be less than the calculated value of the resultant force .

[0060] For the physical verification plan, DV verification can be carried out after the tooling parts are presented. The verification method is generally to fix the parts on the bench in the vehicle state to make it in the normal use state, and continuously let the water flow vertically into the drainage trough through the water inlet hole at the flow velocity under normal operating conditions for a period of time, and observe the drainage situation of the water chute. The water flow needs to be able to flow out smoothly without water accumulation.

[0061] In addition to the locking force of the locking spring 23 being appropriate, it is also necessary to ensure a certain durability requirement. The test requirement is recommended as follows: After continuously opening the check valve at the designed maximum opening angle for a period of time by an external force, then removing the external force for a period of time. The above is one cycle, and a certain number of cycles are carried out in total. After the test, the check valve baffle 24 needs to be sealed with the water trough body 1, and this result can be obtained through a leak tightness test activity.

[0062] After adding the check valve assembly 2 of the present invention to the front cabin decorative cover, the water vapor separation in the air intake area of the air conditioner can be realized. Therefore, there is no need to arrange the water trough sheet metal in the front cabin, which can effectively reduce the vehicle cost and weight. At the same time, the front cabin space can be further compressed, which is beneficial to the platform layout and styling design.

[0063] The above content is only to illustrate the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby. Any modification made on the basis of the technical solution according to the technical idea proposed by the present invention falls within the protection scope of the present invention.

Claims

1. A water-gas separation check valve device for a front cabin decorative cover, characterized in that: include: A water trough body (1), wherein a water outlet (11) is provided on the water trough body (1); a check valve baffle (24), the check valve baffle (24) being movably connected to the water flow channel body (1), the check valve baffle (24) being located on the drain outlet (11); A locking spring (23), wherein the water flow channel body (1) and the check valve baffle (24) are also connected via the locking spring (23), and the locking spring (23) enables the check valve baffle (24) to be closely attached to the drain outlet (11).

2. The water-gas separation check valve device for the front compartment decorative cover according to claim 1, characterized in that: The water flow channel body (1) has an angle with the horizontal direction.

3. The water-gas separation check valve device for the front cabin decorative cover according to claim 2, characterized in that: The angle is greater than or equal to 5°.

4. The water-gas separation check valve device for the front compartment decorative cover according to claim 1, characterized in that: Two connection seats (13) are provided on the water flow trough body (1), and the two connection seats (13) are located at the top of the drain outlet (11). The check valve baffle (24) is movably connected to the two connection seats (13) via an axle pin (21), and the check valve baffle (24) is located between the two connection seats (13).

5. The water-gas separation check valve device for the front compartment decorative cover according to claim 4, characterized in that: The two connecting seats (13) are each provided with a first mounting opening (12), and the shaft pin (21) is movably inserted into the first mounting opening (12); The check valve baffle (24) is provided with a second mounting opening (25), and the shaft pin (21) is embedded in the second mounting opening (25).

6. The water-gas separation check valve device for the front compartment decorative cover according to claim 1, characterized in that: The check valve baffle (24) adopts a soft rubber structure.

7. The water-gas separation check valve device for the front compartment decorative cover according to claim 1, characterized in that: A sealing sponge (22) is provided on the check valve baffle (24), and the sealing sponge (22) is located between the check valve baffle (24) and the drain port (11).

8. The water-gas separation check valve device for the front compartment decorative cover according to claim 1, characterized in that: The check valve baffle (24) is located between the drain port (11) and the locking spring (23), and the locking spring (23) comprises a spiral portion (26) and two straight portions (27), wherein one straight portion (27) is fixedly connected to the check valve baffle (24), and the other straight portion (27) is fixedly connected to the water trough body (1).

9. The water-gas separation check valve device for the front compartment decorative cover according to claim 1, characterized in that: The locking force of the locking spring (23) is greater than the first combined force and less than the second combined force, specifically as follows: Among them, the is the first combined force, is the locking force of the locking spring (23), is the second resultant force; The first combined force is specifically as follows: in, is the inertia force of the check valve baffle (24), is the weight of the check valve baffle (24), The angle between the gravity of the check valve baffle (24) and the direction of the inertia force of the check valve baffle (24); The second combined force is specifically as follows: in, is the gravity of the maximum amount of water allowed to accumulate in the water tank body (1), is the inertial force of the maximum amount of water allowed to accumulate in the water trough body (1).

10. A working method of a water-gas separation check valve device for a front cabin decorative cover, based on the water-gas separation check valve device for a front cabin decorative cover according to any one of claims 1 to 9, characterized in that: The following steps are involved: When the water flow channel body (1) does not need to drain water, the locking spring (23) causes the check valve baffle (24) to be closely attached to the drain port (11); When water accumulates in the water flow channel body (1), the check valve baffle (24) opens the water outlet (11) under the pushing action of the accumulated water, thereby achieving water drainage.

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