An in-vehicle air pressure regulating valve

Abstract

The application discloses a kind of in-car air pressure regulating valves, including valve body, the valve body is shaped with left and right direction observation valve hole and pressure measuring hole;Valve hole is equipped with the valve piece being matched with it, valve piece is fixed in the middle of rotating shaft, rotating shaft is connected with the motor that drives it to rotate;The inner wall of pressure measuring hole is fixed with elastic diaphragm, the middle part of elastic diaphragm is fixed with measuring rod, the left end of measuring rod is shaped with taper portion, the upper side outer wall of taper portion is pressed against the measuring end of displacement sensor, displacement sensor is fixed on support, support is fixed on the inner wall of pressure measuring hole.The application can automatically adjust the opening of valve piece by detecting the size of pressure difference between inside and outside of car, at the same time, through filter screen, dust, harmful substances and the like outside the car can be effectively prevented from entering into car compartment, so as to improve the freshness of air in car.

Description

Technical Field

[0001] This invention relates to the field of valve technology, and more specifically to an in-vehicle air pressure regulating valve. Background Technology

[0002] In existing buses, the air pressure inside the vehicle increases when the doors close, increasing the resistance to closing the doors. Buses need to ventilate to maintain fresh air while in motion, but the increased air pressure during air intake negatively impacts the comfort of the driver and passengers. To address this, pressure relief valves are installed on the vehicle body. While this provides pressure relief, dust, harmful substances, or gases from outside can enter the vehicle through the pressure relief vents, affecting the interior environment. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an in-vehicle air pressure regulating valve that can automatically adjust the opening of the valve plate by detecting the pressure difference between the inside and outside of the vehicle. At the same time, the filter screen can effectively prevent dust, harmful substances and other substances from entering the vehicle compartment, thereby improving the air freshness inside the vehicle.

[0004] The solution of the present invention to the aforementioned technical problem is:

[0005] An in-vehicle air pressure regulating valve includes a valve body with a valve hole for left-right observation and a pressure measuring hole. A valve plate is provided in the valve hole and is fixed to the middle of a rotating shaft, which is connected to a motor for driving its rotation. An elastic diaphragm is fixed to the inner wall of the pressure measuring hole, and a measuring rod is fixed to the middle of the elastic diaphragm. A cone is formed at the left end of the measuring rod, and the upper outer wall of the cone presses against the measuring end of a displacement sensor. The displacement sensor is fixed to a bracket, which is fixed to the inner wall of the pressure measuring hole.

[0006] A filter screen is fixed to the right end of the valve body.

[0007] A reduction gear is fixed on the rotating shaft, and the reduction gear meshes with a drive gear, which is fixed on the motor shaft of the motor; the motor is fixed in the first recess of the valve body.

[0008] The valve body has a second recessed cavity formed at the end away from the motor. An assembly hole is formed on the side wall of the second recessed cavity, and a screw is fitted into the assembly hole.

[0009] Multiple baffles are fixed at the left end of the valve hole and the left end of the pressure measuring hole.

[0010] The bracket has a sleeve hole coaxially arranged with the measuring rod. Multiple hemispherical protrusions are fixed in the sleeve hole. The end of the measuring rod away from the cone is inserted into the sleeve hole. The hemispherical protrusions press against the outer wall of the measuring rod.

[0011] The measuring rod is hollow inside.

[0012] The displacement sensor 34 and the motor 23 are both electrically connected to the vehicle controller.

[0013] The outstanding effect of this invention is that, compared with the prior art, it can automatically adjust the opening of the valve plate by detecting the pressure difference between the inside and outside of the vehicle, and at the same time, the filter screen can effectively prevent dust and harmful substances from the outside of the vehicle from entering the passenger compartment, thereby improving the air freshness inside the vehicle. Attached Figure Description

[0014] Figure 1 This is a front view of the present invention;

[0015] Figure 2 for Figure 1 A magnified view of a specific area (A);

[0016] Figure 3 This is the left view of the present invention. Detailed Implementation

[0017] See the example. Figures 1 to 3 As shown, an in-vehicle air pressure regulating valve includes a valve body 1, which has a valve hole 11 for left-right viewing and a pressure measuring hole 12. A valve plate 21 is provided in the valve hole 11 and is fixed to the middle of a rotating shaft 22. The rotating shaft 22 is connected to a motor 23 that drives it to rotate. An elastic diaphragm 31 is fixed on the inner wall of the pressure measuring hole 12. A measuring rod 32 is fixed to the middle of the elastic diaphragm 31. A cone 33 is formed at the left end of the measuring rod 32. The upper outer wall of the cone 33 presses against the measuring end of a displacement sensor 34. The displacement sensor 34 is fixed on a bracket 35, and the bracket 35 is fixed on the inner wall of the pressure measuring hole 12.

[0018] Furthermore, a filter screen 4 is fixed to the right end of the valve body 1.

[0019] Furthermore, a reduction gear 24 is fixed on the rotating shaft 22, and the reduction gear 24 meshes with a drive gear 25. The drive gear 25 is fixed on the motor shaft of the motor 23. The motor 23 is fixed in the first recess 14 of the valve body 1.

[0020] Furthermore, the valve body 1 has a second recessed cavity 15 formed at the end away from the motor 23, and an assembly hole 16 is formed on the side wall of the second recessed cavity 15, with a screw 5 fitted inside the assembly hole 16.

[0021] Furthermore, multiple vertically and horizontally distributed baffles 6 are fixed to the left end of the valve hole 11 and the left end of the pressure measuring hole 12.

[0022] Furthermore, the bracket 35 has a sleeve hole 36 coaxially arranged with the measuring rod 32. Multiple hemispherical protrusions 37 are fixed in the sleeve hole 36. The end of the measuring rod 32 away from the cone 33 is inserted into the sleeve hole 36. The hemispherical protrusions 37 press against the outer wall of the measuring rod 32.

[0023] Furthermore, the measuring rod 32 is hollow inside.

[0024] The displacement sensor 34 and the motor 23 are both electrically connected to the vehicle controller.

[0025] Working principle: This regulating valve is fixed to the two side walls of the carriage by screws 5, for example, between two windows, and one side of the regulating valve baffle 6 faces the inside of the carriage.

[0026] When the air pressure inside the carriage is high, the elastic diaphragm 31 bulges outward, causing the measuring rod 32 to move outward. The measuring rod 32 then moves the cone 33. The displacement sensor detects a change in the position of the cone and transmits the signal to the controller. The controller then controls the motor 23 to rotate, which in turn drives the drive gear to rotate. The drive gear then drives the reduction gear 24 to rotate, which in turn drives the valve plate 21 to rotate via the shaft 22. The opening of the valve plate can be determined based on the number of revolutions the motor shaft makes. The gas inside the carriage flows out through the valve port 11. When the pressure difference between the inside and outside of the carriage is small, the elastic diaphragm returns to its original position according to its own characteristics and moves the measuring rod 32 back to the corresponding position.

[0027] Filter 4 prevents outside air from entering the passenger compartment.

[0028] Finally, the above embodiments are only used to illustrate the present invention and are not intended to limit the present invention. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions also fall within the scope of the present invention, and the patent protection scope of the present invention should be defined by the claims.

Claims

1. A vehicle interior air pressure regulating valve, comprising a valve body (1), characterized in that: The valve body (1) is formed with a valve hole (11) for observation in the left and right directions and a pressure measuring hole (12); a valve plate (21) is provided in the valve hole (11) to cooperate with it, the valve plate (21) is fixed in the middle of the rotating shaft (22), and the rotating shaft (22) is connected to a motor (23) to drive it to rotate; an elastic diaphragm (31) is fixed on the inner wall of the pressure measuring hole (12), a measuring rod (32) is fixed in the middle of the elastic diaphragm (31), a cone (33) is formed on the left end of the measuring rod (32), the upper outer wall of the cone (33) is pressed against the measuring end of the displacement sensor (34), the displacement sensor (34) is fixed on the bracket (35), and the bracket (35) is fixed on the inner wall of the pressure measuring hole (12); Multiple baffles (6) are fixed at the left end of the valve hole (11) and the left end of the pressure measuring hole (12). The regulating valve is fixed to the side wall of the car body by screws (5), and one side of the regulating valve's baffle (6) faces the inside of the car body; A reduction gear (24) is fixed on the rotating shaft (22), and the reduction gear (24) meshes with a drive gear (25). The drive gear (25) is fixed on the motor shaft of the motor (23). The motor (23) is fixed in the first recess (14) of the valve body (1). When the air pressure inside the car is high, the elastic diaphragm (31) bulges outward, and the elastic diaphragm drives the measuring rod (32) to move outward. The measuring rod drives the cone (33) to move, and the measuring end of the displacement sensor measures the change in the position of the cone, thereby transmitting the signal to the controller. The controller controls the motor (23) to rotate, the motor drives the drive gear to rotate, the drive gear drives the reduction gear (24) to rotate, and the reduction gear drives the valve plate (21) to rotate through the rotating shaft (22). The opening degree of the valve plate is determined according to the number of revolutions of the motor shaft. The gas inside the car flows out to the outside of the car through the valve hole (11). When the pressure difference between the inside and outside of the car is not large, the elastic diaphragm returns to its original position according to its own characteristics and drives the measuring rod (32) to move back to the corresponding position. The valve plate opening degree is automatically adjusted by detecting the pressure difference between the inside and outside of the car. At the same time, the filter screen effectively prevents dust and harmful substances from the outside of the car from entering the car, thereby improving the air freshness inside the car.

2. The in-vehicle air pressure regulating valve according to claim 1, characterized in that: A filter screen (4) is fixed to the right end of the valve body (1).

3. The in-vehicle air pressure regulating valve according to claim 1, characterized in that: The valve body (1) has a second recess (15) formed at the end away from the motor (23). An assembly hole (16) is formed on the side wall of the second recess (15), and a screw (5) is fitted into the assembly hole (16).

4. The in-vehicle air pressure regulating valve according to claim 1, characterized in that: The bracket (35) has a sleeve hole (36) coaxially arranged with the measuring rod (32). Multiple hemispherical protrusions (37) are fixed in the sleeve hole (36). The end of the measuring rod (32) away from the cone (33) is inserted into the sleeve hole (36). The hemispherical protrusions (37) press against the outer wall of the measuring rod (32).

5. The in-vehicle air pressure regulating valve according to claim 1, characterized in that: The measuring rod (32) is hollow inside.

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