Trailer multi-functional integrated device and trailer

Abstract

This invention relates to the field of vehicle braking systems, and particularly to a multi-functional integrated device for trailers and a trailer. The multi-functional integrated device for trailers includes an air treatment module for purifying input air, a pressure-limiting overflow module for regulating the air in the air treatment module, and an air suspension control module for controlling the vehicle's air suspension. The air treatment module has a first outer shell and a second outer shell, with the first outer shell mounted on the second outer shell. The pressure-limiting overflow module has a third outer shell, and the air suspension control module has a fourth outer shell. A four-way cavity is provided inside the second outer shell. This invention solves the technical problem in the prior art: how to propose a multi-functional integrated device for trailers that can realize multiple functions such as air treatment, pressure-limiting overflow, and air suspension control.

Description

Technical Field

[0001] This invention relates to the field of vehicle braking systems, and particularly to a multi-functional integrated device for trailers and a trailer. Background Technology

[0002] With the rapid development of the national economy, changes have occurred in the air braking systems and suspension structures of automobiles. Regulations have also increased accordingly, such as JT / T 1178.2-2019, which stipulates that the air braking systems of tractor vehicles and trailers should be equipped with devices that maintain compressed air dryness and separate oil and water. Furthermore, the vast majority of bus chassis and tractor cabs now use air suspension structures, and this is gradually being adopted in the trailer market as well.

[0003] In existing technologies, to achieve the three functions of air handling, pressure relief, and air suspension control, the methods often involve simply combining and installing the components disclosed in prior art documents CN107789958A, CN208587573U, CN203395308U, and CN222669044U. This requires the use of external piping to connect the air handling unit, pressure relief valve, relief valve, and air suspension valve together. Firstly, this increases the use of external components, making installation inconvenient and subsequent maintenance cumbersome and complex. Secondly, after the components are assembled using external piping, the gas needs to travel through long pipelines, which slows down the vehicle's response speed and increases driving risks. Thirdly, if a short external piping is used to simply combine the multiple valve bodies, the output port of one valve body is easily and inevitably blocked by the outer shell of other valve bodies. Therefore, this cannot be achieved simply by combining them.

[0004] Therefore, the technical problem in the prior art is: how to propose a multi-functional integrated device for trailers that can realize multiple functions such as air treatment, pressure limiting overflow, and suspension control. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned deficiencies in the prior art by providing a multi-functional integrated device for trailers.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0007] The trailer multi-functional integrated device includes an air treatment module for purifying the input air, a pressure limiting overflow module for regulating the air in the air treatment module, and an air suspension control module for controlling the vehicle's air suspension. The air treatment module has a first housing and a second housing, with the first housing mounted on the second housing. The pressure limiting overflow module has a third housing, and the air suspension control module has a fourth housing. The third housing is located between the second and fourth housings, and the second, third, and fourth housings are integrally formed.

[0008] The second outer casing has a four-way cavity inside;

[0009] The air handling suspension control integrated device also includes a drying channel. A molecular sieve is installed inside the first outer shell, and an air inlet chamber, an air storage cylinder connection chamber, and a drying output chamber are installed inside the second outer shell. The air inlet chamber, molecular sieve, drying output chamber, and air storage cylinder connection chamber are arranged sequentially along the drying channel path, and each of these chambers serves as a part of the drying channel. Furthermore, the drying output chamber is connected to a four-way cavity. A first one-way valve is installed between the drying output chamber and the four-way cavity to direct the drying output chamber unilaterally toward the four-way cavity.

[0010] The second housing is also provided with a pressure regulating channel, a pressure regulating chamber, and a control piston chamber. The four-way chamber and the pressure regulating chamber are connected by the pressure regulating channel. The pressure regulating chamber is located between the control piston chamber and the pressure regulating channel. A first valve port is provided between the pressure regulating chamber and the control piston chamber. A movable first piston assembly is provided in the pressure regulating chamber. The first piston assembly is used to open or cut off the first valve port.

[0011] The second outer shell is also provided with an unloading chamber on the side opposite to the first outer shell. A second valve port is provided inside the second outer shell. The second valve port is located between the air intake chamber and the unloading chamber. The air intake chamber and the unloading chamber are connected or disconnected by opening and closing the second valve port.

[0012] It also includes a second piston assembly, which has a first part and a second part. The first part is movably disposed in the control piston chamber and slides in a sealing contact with the inner wall of the control piston chamber. The second part is used to open or shut off the second valve port.

[0013] The second housing is also provided with a brake system output channel. One end of the brake system output channel is connected to the four-way cavity, and the other end is used to supply air to the vehicle's brake system.

[0014] The air handling suspension control integrated device is also equipped with a pressure limiting overflow channel. One end of the pressure limiting overflow channel is connected to the four-way cavity. The pressure limiting overflow channel is equipped with a pressure limiting valve and an overflow valve, which are used to limit the pressure and overflow the gas flowing through the four-way cavity, respectively. The gas that has passed through the pressure limiting overflow channel and has not been discharged continues to be delivered to the air suspension control module.

[0015] Furthermore, the third housing is also provided with a pressure limiting input cavity and a pressure limiting output cavity. The pressure limiting input cavity and the pressure limiting output cavity are each part of the pressure limiting overflow channel. The pressure limiting input cavity is located at one end of the pressure limiting overflow channel. The pressure limiting input cavity is connected to the four-way cavity in the pressure limiting overflow channel.

[0016] The pressure limiting overflow module includes a pressure limiting valve, which is fixedly installed with the third housing. The pressure limiting valve is located between the pressure limiting input chamber and the pressure limiting output chamber and is used to connect or disconnect the pressure limiting input chamber and the pressure limiting output chamber.

[0017] The third housing is provided with an overflow inlet chamber and an overflow outlet chamber, which are each part of the pressure-limiting overflow channel and are connected to each other; the bottom of the third housing is also provided with an outlet of the suspended gas storage device, and the overflow outlet chamber is connected to the outlet of the suspended gas storage device.

[0018] The pressure limiting overflow module also includes an overflow valve, which is fixedly installed with the third housing. The overflow valve is located between the overflow input chamber and the overflow output chamber and is used to connect or disconnect the overflow input chamber and the overflow output chamber.

[0019] Furthermore, a first receiving cavity is provided inside the fourth housing, a first moving valve core is provided inside the first receiving cavity, an air storage cavity is provided inside the first moving valve core, a first opening is formed on the surface of the first moving valve core, and one end of the air storage cavity is connected to the first opening; a reserved pipe is also provided inside the fourth housing, and the other end of the air storage cavity is connected to the overflow output cavity through the reserved pipe; a control channel is also provided on one side of the first moving valve core.

[0020] The fourth outer shell is also provided with a first iron core channel, which is connected to the first receiving cavity. The first iron core channel is provided with a first electromagnet and a first moving iron core. The first electromagnet is used to drive the first moving iron core to move toward the first electromagnet after being energized. The movable first moving iron core is used to open or cut off the first opening.

[0021] A second moving valve core is also provided in the first receiving cavity. The first moving valve core is located between the second moving valve core and the first moving iron core. The second moving valve core is in sliding sealing contact with the cavity side wall of the first receiving cavity. This part of the first receiving cavity between the first moving valve core and the second moving valve core is defined as the control cavity. The control channel is set between the control cavity and the first opening. A protruding foot is provided on the side of the second moving valve core away from the first moving valve core.

[0022] A third moving valve core is provided at the bottom of the first receiving cavity. The third moving valve core includes a first core body and a first moving spring. The first core body is provided with a first protrusion. One end of the first moving spring abuts against the bottom wall of the first receiving cavity, and the other end abuts against the lower surface of the first protrusion. The protrusion is used to push the first protrusion to move against the first moving spring.

[0023] A third valve port is also provided in the first receiving cavity. The third valve port is located between the first convex eave and the convex foot. The upper surface of the first convex eave can open or cut off the third valve port.

[0024] The fourth housing is also provided with a first channel, one end of which is connected to the overflow output chamber and the other end of which points to the third valve port; the first channel and the third valve port are each part of the pressure limiting overflow channel;

[0025] The fourth housing is also provided with a central channel, one end of which is connected to the third valve port;

[0026] The fourth housing is also provided with an air-suspended output chamber and a fourth valve port, the fourth valve port being located between the air-suspended output chamber and the middle channel; a movable output valve core assembly is provided inside the air-suspended output chamber, the output valve core assembly being used to open or shut off the fourth valve port;

[0027] The fourth housing is provided with a second iron core channel, and a second electromagnet and a second moving iron core are provided in the second iron core channel. The second electromagnet is used to attract the second moving iron core to move toward the second electromagnet after being energized. The fourth housing is also provided with a second receiving cavity, which is connected to the second iron core channel. The fourth moving valve core assembly is provided in the second receiving cavity.

[0028] The output valve core assembly includes a second core and a second moving spring. The second core is provided with a second protrusion on the side facing the fourth moving valve core assembly. One end of the second moving spring abuts against the bottom wall of the second receiving cavity, and the other end abuts against the second protrusion. The fourth valve port is located between the fourth moving valve core assembly and the second protrusion.

[0029] The fourth outer shell has a first suspended output port on one side, which is connected to the suspended output cavity.

[0030] Furthermore, a receiving cavity is provided inside the second moving valve core, and an air outlet is provided on the side of the second moving valve core. During the movement of the second moving valve core, the air outlet is either opened or cut off by the inner wall of the first receiving cavity.

[0031] A first gap is provided between the protrusion of the second valve core and the side wall of the first receiving cavity, and the receiving cavity is located between the air outlet and the first gap; an upper channel is provided inside the fourth housing, and the air outlet is located between the second receiving cavity and the upper channel;

[0032] An air suspension control exhaust port is provided on one side of the fourth housing, and the upper channel is connected to the air suspension control exhaust port.

[0033] Furthermore, it also includes a base, which is fixedly connected to the first outer shell. The base is located between the molecular sieve and the air inlet chamber, and the base is provided with airflow holes.

[0034] It also includes filter cotton, which is set on the base;

[0035] It also includes a baffle, which has a bent portion and a straight cylindrical portion. The bent portion is located between the airflow hole and the filter cotton. The bent portion is used to guide the gas from the airflow hole toward the filter cotton and to cut off the gas from the airflow hole toward the molecular sieve. The inner wall of the straight cylindrical portion wraps around the circumferential outer surface of the molecular sieve, and an annular channel is provided between the outer surface of the straight cylindrical portion and the inner wall of the first outer shell.

[0036] The first outer shell is a barrel-shaped structure, and a drying and filtration upper chamber is provided between the upper surface of the molecular sieve and the inner bottom wall of the first outer shell. The drying and filtration upper chamber is connected to the annular channel.

[0037] The airflow holes, the pores of the filter cotton, the annular channel, and the upper drying filter chamber are each part of the drying channel. The air inlet chamber, airflow holes, the pores of the filter cotton, the annular channel, the upper drying filter chamber, the pores of the molecular sieve, the drying output chamber, and the air storage cylinder connection chamber are arranged in sequence.

[0038] Furthermore, an air intake channel and a drainage and exhaust channel are also provided inside the second housing. The air intake chamber is connected to the drainage and exhaust channel through the air intake channel, and the second valve port is located between the drainage and exhaust channel and the unloading chamber.

[0039] The second part of the second piston assembly includes a pad, a first piston head, and a first spring. The inner wall of the unloading chamber is provided with a second stepped surface. The edge of the pad is stuck on the second stepped surface, and the first spring is disposed between the pad and the first piston head.

[0040] The side of the first piston head is provided with an inclined surface. Compared with the direction of the second part pointing to the first part, the inclined surface is inclined at a preset angle, and the end of the drain and exhaust passage that is away from the intake passage points to the inclined surface.

[0041] Furthermore, the present invention also proposes a trailer that includes the aforementioned trailer multi-functional integrated device.

[0042] Compared with the prior art, the advantages of this invention are:

[0043] Firstly, in existing technologies, each valve body has its own outer shell, with multiple valve bodies corresponding to multiple outer shells. These outer shells are connected by pipes, which occupy a significant amount of space. Furthermore, the connectors between these pipes increase production costs. In this invention, the second outer shell of the air handling module (for purifying the input air), the third outer shell of the pressure-limiting overflow module (for regulating the air in the air handling module), and the fourth outer shell of the air suspension control module (for controlling the vehicle's air suspension) are integrated into a single structure. This is the first step in the integration process. The technical solution of this invention concentrates multiple valve bodies within a single, integrated shell, eliminating the need for pipe connections between shells, saving space, reducing the use of pipe connectors, and lowering costs.

[0044] Then, in the prior art, if the contents disclosed in CN107789958A, CN208587573U, CN203395308U, and CN222669044U are simply combined and installed together, the various air passages are not interconnected and are connected by external pipelines. This results in each air passage being relatively long, and the gas flowing through the long pipelines, which slows down the vehicle's response speed and increases driving risks. In this invention, a four-way cavity is set up, which is connected to the drying output cavity, the pressure regulating channel, the braking system output channel, and the pressure limiting overflow channel respectively. This is the second step of the combination. By designing a four-way cavity, this invention allows four air passages to share a single four-way cavity, avoiding the production design method of opening multiple cavities and avoiding the situation where the air passages are designed to be too long to avoid each other. This improves the vehicle's response speed and reduces driving risks. At the same time, this invention sets valve bodies in multiple air passages, which also ensures that there is no cross-contamination between adjacent air passages.

[0045] Finally, in the prior art, if a short pipeline is used to simply combine the above-mentioned multiple valve bodies, the output port of one valve body is easily and inevitably blocked by the outer shell of other valve bodies; the technical solution proposed in this invention uses a single outer shell for multiple valve bodies, and an output port is opened on the outer shell, which also avoids the situation where the output port is blocked.

[0046] In summary, this invention solves the technical problem in the prior art: how to propose a multi-functional integrated device for trailers that can realize multiple functions such as air treatment, pressure limiting overflow, and suspension control. Attached Figure Description

[0047] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0048] Figure 2 This is an enlarged view of the structure of the first electromagnet, the first moving iron core, and the second moving valve core in Example 1;

[0049] Figure 3 This is an enlarged view of the structure of the second piston assembly in Embodiment 1;

[0050] Figure 4 This is a schematic diagram of the air path for achieving the drying function of this invention;

[0051] Figure 5 This is a schematic diagram of the gas path for achieving the backflush regeneration function of the present invention;

[0052] Figure 6 This is a schematic diagram of the gas path for achieving the pressure limiting function of this invention;

[0053] Figure 7 This is a schematic diagram of the gas path for achieving the overflow function of this invention;

[0054] Figure 8 This is a schematic diagram of the air path for inflating the airbag to achieve the air suspension control function of this invention.

[0055] Figure 9 This is a schematic diagram of the airflow path for the airbag exhaust of the present invention.

[0056] Marked in the image:

[0057] Air handling module (100), pressure limiting overflow module (200), air suspension control module (300).

[0058] First outer shell (1), second outer shell (2), third outer shell (3), fourth outer shell (4), four-way cavity (5), molecular sieve (6), air inlet cavity (7), air storage cylinder connection cavity (8), drying output cavity (9), first one-way valve (10), pressure regulating channel (11), pressure regulating cavity (12), control piston cavity (13), first valve port (14), first piston assembly (15), unloading cavity (16), second valve port (17), second piston assembly (18), first part (19), second part (20), braking system output channel (21) Pressure limiting overflow channel (22), pressure limiting valve (23), pressure limiting input chamber (24), pressure limiting output chamber (25), overflow valve (26), overflow input chamber (27), overflow output chamber (28), air-suspended gas storage device output port (29), first receiving chamber (30), first moving valve core (31), gas storage chamber (32), first opening (33), reserved pipe (34), first iron core channel (35), first electromagnet (36), first moving iron core (37), second moving valve core (38), control channel (39), control chamber (40), convex Foot (41), third valve port (42), third moving valve core (43), first core (44), first moving spring (45), first cantilever (46), first channel (47), middle channel (48), suspended output chamber (49), fourth valve port (50), output valve core assembly (51), second iron core channel (52), second electromagnet (53), second moving iron core (54), second receiving chamber (55), fourth moving valve core assembly (57), fifth moving valve core, second core (58), second moving spring (59), second cantilever (60) The components include: first air outlet (61), accommodating cavity (62), first gap (63), air outlet (64), upper channel (65), air suspension control exhaust port (66), base (67), airflow hole (68), filter cotton (69), baffle (70), bending part (71), straight cylinder part (72), annular channel (73), drying filter upper cavity (74), drainage exhaust channel (75), air intake channel (76), pad (77), first piston head (78), first spring (79), second step surface (80), and inclined surface (81). Detailed Implementation

[0059] The following detailed, non-limiting description of the invention's technical solutions, in conjunction with preferred embodiments and accompanying drawings, is provided. In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length h," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the invention, and should not be construed as limiting the invention.

[0060] Example 1

[0061] like Figures 1-3 As shown, this embodiment proposes a multi-functional integrated device for trailers, which includes an air treatment module 100 for purifying the input air, a pressure limiting overflow module 200 for regulating the air in the air treatment module 100, and an air suspension control module 300 for controlling the vehicle's air suspension. The air treatment module 100 has a first outer shell 1 and a second outer shell 2, with the first outer shell 1 mounted on the second outer shell 2. The pressure limiting overflow module 200 has a third outer shell 3, and the air suspension control module 300 has a fourth outer shell 4. The third outer shell 3 is located between the second outer shell 2 and the fourth outer shell 4. The second outer shell 2, the third outer shell 3, and the fourth outer shell 4 are integrally formed.

[0062] The second outer shell 2 has a four-way cavity 5 inside;

[0063] The air handling suspension control integrated device also includes a drying channel. A molecular sieve 6 is installed inside the first outer shell 1, and an air inlet chamber 7, an air storage cylinder connecting chamber 8, and a drying output chamber 9 are installed inside the second outer shell 2. Along the path of the drying channel, the air inlet chamber 7, molecular sieve 6, drying output chamber 9, and air storage cylinder connecting chamber 8 are arranged sequentially, and each of these chambers serves as a part of the drying channel. Furthermore, the drying output chamber 9 communicates with a four-way chamber 5. A first one-way valve 10 is installed between the drying output chamber 9 and the four-way chamber 5, and the first one-way valve 10 is used to unidirectionally guide the drying output chamber 9 towards the four-way chamber 5.

[0064] The second outer casing 2 is also provided with a pressure regulating channel 11, a pressure regulating chamber 12, and a control piston chamber 13. The four-way chamber 5 and the pressure regulating chamber 12 are connected through the pressure regulating channel 11. The pressure regulating chamber 12 is located between the control piston chamber 13 and the pressure regulating channel 11. A first valve port 14 is provided between the pressure regulating chamber 12 and the control piston chamber 13. A movable first piston assembly 15 is provided in the pressure regulating chamber 12. The first piston assembly 15 is used to open or cut off the first valve port 14.

[0065] The second outer shell 2 is also provided with an unloading chamber 16 on the side opposite to the first outer shell 1. A second valve port 17 is provided inside the second outer shell 2. The second valve port 17 is located between the air intake chamber 7 and the unloading chamber 16. The air intake chamber 7 and the unloading chamber 16 are connected or disconnected by the opening and closing of the second valve port 17.

[0066] It also includes a second piston assembly 18, which has a first part 19 and a second part 20. The first part 19 is movably disposed in the control piston chamber 13 and slides in a sealing contact with the inner wall of the control piston chamber 13. The second part 20 is used to open or shut off the second valve port 17.

[0067] The second outer casing 2 is also provided with a brake system output channel 21. One end of the brake system output channel 21 is connected to the four-way cavity 5, and the other end is used to supply air to the vehicle brake system.

[0068] The air handling suspension control integrated device is also equipped with a pressure limiting overflow channel 22. One end of the pressure limiting overflow channel 22 is connected to the four-way cavity 5. The pressure limiting overflow channel 22 is equipped with a pressure limiting valve 23 and an overflow valve 26, which are used to limit the pressure and overflow the gas flowing through the four-way cavity 5, respectively. The gas that has passed through the pressure limiting overflow channel 22 and has not been discharged continues to be delivered to the suspension control module 300.

[0069] Preferably, the second outer shell 2, the third outer shell 3, and the fourth outer shell 4 are integrally formed by welding. Of course, in other alternative embodiments, other integral forming methods applicable to this solution in the prior art can also be adopted. The structure of the first piston assembly 15 adopts the most common piston structure in the prior art, which will not be described in detail here; the structure of the first one-way valve 10 adopts the most common one-way valve structure in the prior art, which will not be described in detail here.

[0070] As can be seen from the background technology, the existing technical problem is: how to propose a multi-functional integrated device for trailers that can realize multiple functions such as air treatment, pressure limiting overflow, and suspension control.

[0071] Firstly, in the prior art, each valve body is provided with an outer shell, and multiple valve bodies correspond to multiple outer shells. The multiple outer shells are connected by pipelines, and the multiple pipelines between the multiple outer shells occupy a large space. The connectors connecting the various pipelines also increase the production cost. In this embodiment, the second outer shell 2 of the air handling module 100 used to purify the input air, the third outer shell 3 of the pressure limiting overflow module 200 used to regulate the air of the air handling module 100, and the fourth outer shell 4 of the air suspension control module 300 used to control the vehicle's air suspension are made into an integrated structure. This is the first step in the integration. The technical solution of this embodiment concentrates multiple valve bodies in a single integrated shell, eliminating the pipeline connections between the outer shells, saving space, reducing the use of pipeline connectors, and saving costs.

[0072] Furthermore, in the prior art, if the contents disclosed in CN107789958A, CN208587573U, CN203395308U, and CN222669044U are simply combined and installed together, with each air passage being independent of the others and connected via external pipelines, this results in each air passage being quite long. Gas travels through these long pipelines, slowing down vehicle response and increasing driving risks. In this embodiment, a four-way cavity 5 is provided, which is connected to the drying output cavity 9 respectively. The pressure regulating channel 11, the braking system output channel 21, and the pressure limiting overflow channel 22 are connected, which is the second step of the connection. In this embodiment, a four-way cavity 5 is designed so that the four air passages share one four-way cavity 5, which avoids the production design method of opening multiple cavities and also avoids the situation where the air passages are designed to be too long to avoid each other. This improves the vehicle body response speed and reduces driving risks. At the same time, valve bodies are set in multiple air passages in this embodiment, which also ensures that there is no cross-flow between adjacent air passages.

[0073] Finally, in the prior art, if a short pipeline is used to simply combine the above-mentioned multiple valve bodies, the output port of one valve body is easily and inevitably blocked by the outer shell of other valve bodies; the technical solution proposed in this embodiment, in which multiple valve bodies share a single outer shell and an output port is opened on the outer shell, also avoids the situation where the output port is blocked.

[0074] In summary, this embodiment solves the technical problem in the prior art: how to propose a multi-functional integrated device for trailers that can realize multiple functions such as air treatment, pressure limiting overflow, and suspension control.

[0075] like Figures 1-3As shown, more specifically, the third housing 3 is further provided with a pressure limiting input chamber 24 and a pressure limiting output chamber 25. The pressure limiting input chamber 24 and the pressure limiting output chamber 25 are each part of the pressure limiting overflow channel 22. The pressure limiting input chamber 24 is located at one end of the pressure limiting overflow channel 22, and the pressure limiting input chamber 24 is connected to the four-way cavity 5 in the pressure limiting overflow channel 22. The pressure limiting overflow module 200 includes a pressure limiting valve 23, which is fixedly installed with the third housing 3. The pressure limiting valve 23 is located between the pressure limiting input chamber 24 and the pressure limiting output chamber 25, and is used to connect or disconnect the pressure limiting input chamber 24 and the pressure limiting output chamber 25. The housing 3 is provided with an overflow input chamber 27 and an overflow output chamber 28. The overflow input chamber 27 and the overflow output chamber 28 are each part of the pressure-limiting overflow channel 22, and the overflow input chamber 27 and the pressure-limiting output chamber 25 are connected. The bottom of the third housing 3 is also provided with a suspended gas storage device output port 29, and the overflow output chamber 28 is connected to the suspended gas storage device output port 29. The pressure-limiting overflow module 200 also includes an overflow valve 26, which is fixedly installed with the third housing 3. The overflow valve 26 is located between the overflow input chamber 27 and the overflow output chamber 28, and is used to connect or disconnect the overflow input chamber 27 and the overflow output chamber 28.

[0076] The pressure relief valve 23 mentioned above adopts the existing technology structure of CN222669044U, and its technical principle and structure will not be described in detail for the time being.

[0077] The structure of the overflow valve 26 is also existing technology. Its function is to open the overflow valve when the airflow pressure reaches a preset value, and otherwise to cut off the flow. For example, the content disclosed in CN203395308U will not be repeated here.

[0078] like Figures 1-2 More specifically, the fourth outer shell 4 is provided with a first receiving cavity 30, the first receiving cavity 30 is provided with a first moving valve core 31, the first moving valve core 31 is provided with a gas storage cavity 32, the surface of the first moving valve core 31 forms a first opening 33, and one end of the gas storage cavity 32 communicates with the first opening 33; the fourth outer shell 4 is also provided with a reserved pipe 34, and the other end of the gas storage cavity 32 is connected to the overflow output cavity 28 through the reserved pipe 34; a control channel 39 is also provided on one side of the first moving valve core 31;

[0079] The fourth outer shell 4 is also provided with a first iron core channel 35, which is connected to the first receiving cavity 30. The first iron core channel 35 is provided with a first electromagnet 36 and a first moving iron core 37. The first electromagnet 36 is used to drive the first moving iron core 37 to move toward the first electromagnet 36 after being energized. The movable first moving iron core 37 is used to open or cut off the first opening 33.

[0080] A second moving valve core 38 is also provided in the first receiving cavity 30. The first moving valve core 31 is located between the second moving valve core 38 and the first moving iron core 37. The second moving valve core 38 is in sliding sealing contact with the cavity side wall of the first receiving cavity 30. This part of the first receiving cavity 30 between the first moving valve core 31 and the second moving valve core 38 is defined as the control cavity 40. The control channel 39 is provided between the control cavity 40 and the first opening 33. A protruding foot 41 is provided on the side of the second moving valve core 38 away from the first moving valve core 31.

[0081] A third moving valve core 43 is provided at the bottom of the first receiving cavity 30. The third moving valve core 43 includes a first core body 44 and a first moving spring 45. The first core body 44 is provided with a first protrusion 46. One end of the first moving spring 45 abuts against the bottom wall of the cavity of the first receiving cavity 30, and the other end abuts against the lower surface of the first protrusion 46. The protruding foot 41 is used to push the first protrusion 46 to move against the first moving spring 45.

[0082] A third valve port 42 is also provided in the first receiving cavity 30. The third valve port 42 is located between the first protrusion 46 and the protrusion 41. The upper surface of the first protrusion 46 can open or cut off the third valve port 42.

[0083] The fourth outer casing 4 is also provided with a first channel 47, one end of which is connected to the overflow output chamber 28, and the other end points to the third valve port 42; the first channel 47 and the third valve port 42 are respectively a part of the pressure limiting overflow channel 22;

[0084] The fourth outer casing 4 is also provided with a central channel 48, one end of which is connected to the third valve port 42;

[0085] The fourth housing 4 is also provided with a suspended output cavity 49 and a fourth valve port 50. The fourth valve port 50 is located between the suspended output cavity 49 and the middle channel 48. A movable output valve core assembly 51 is provided in the suspended output cavity 49. The output valve core assembly 51 is used to open or cut off the fourth valve port 50.

[0086] The fourth housing 4 is provided with a second iron core channel 52, and a second electromagnet 53 and a second moving iron core 54 are provided in the second iron core channel 52. The second electromagnet 53 is used to attract the second moving iron core 54 to move toward the second electromagnet 53 after being energized. The fourth housing 4 is also provided with a second receiving cavity 55, which is connected to the second iron core channel 52. The second receiving cavity 55 is provided with a fourth moving valve core assembly 57.

[0087] The output valve core assembly 51 includes a second core 58 and a second moving spring 59. The second core 58 is provided with a second protrusion 60 on the side facing the fourth moving valve core assembly 57. One end of the second moving spring 59 abuts against the bottom wall of the second receiving cavity 55, and the other end abuts against the second protrusion 60. The fourth valve port 50 is located between the fourth moving valve core assembly 57 and the second protrusion 60.

[0088] The fourth outer shell 4 has a suspended first output port 61 on one side, which is connected to the suspended output cavity 49.

[0089] The structure of the fourth actuating valve core assembly 57 is similar to that of the first actuating valve core 31 and the second actuating valve core 38, and the working principle is also similar, so it will not be described in detail here. The connection method and communication position between the fourth actuating valve core assembly 57 and the overflow output chamber 28 are the same as those of the first actuating valve core 31, so it will not be described in detail here.

[0090] like Figure 2 As shown, the second moving valve core 38 is further provided with a receiving cavity 62, and the side of the second moving valve core 38 is provided with an air outlet 64. During the movement of the second moving valve core 38, the air outlet 64 is either opened or cut off by the inner wall of the first receiving cavity 30.

[0091] A first gap 63 is provided between the protrusion 41 of the second valve core 38 and the side wall of the first receiving cavity 30, and the receiving cavity 62 is located between the air outlet 64 and the first gap 63; an upper channel 65 is provided inside the fourth outer shell 4, and the air outlet 64 is located between the second receiving cavity 55 and the upper channel 65.

[0092] An air suspension control exhaust port 66 is provided on one side of the fourth outer shell 4, and the upper channel 65 is connected to the air suspension control exhaust port 66.

[0093] like Figure 1 As shown, further, it also includes a base 67, which is fixedly connected to the first outer shell 1. The base 67 is located between the molecular sieve 6 and the air inlet chamber 7, and the base 67 is provided with an airflow hole 68; it also includes a filter cotton 69, which is disposed on the base 67; it also includes a baffle 70, which has a bent portion 71 and a straight cylindrical portion 72. The bent portion 71 is located between the airflow hole 68 and the filter cotton 69, and the bent portion 71 is used to guide the gas from the airflow hole 68 toward the filter cotton 69 and to cut off the gas from the airflow hole 68 toward the molecular sieve 6; the inner wall of the straight cylindrical portion 72 wraps around the circumferential outer surface of the molecular sieve 6. An annular channel 73 is provided between the outer surface of the straight cylindrical part 72 and the inner wall of the first outer shell 1; the first outer shell 1 has a barrel-shaped structure, and a drying and filtering upper chamber 74 is provided between the upper surface of the molecular sieve 6 and the inner bottom wall of the first outer shell 1, and the drying and filtering upper chamber 74 is connected to the annular channel 73; the airflow hole 68, the pores of the filter cotton 69, the annular channel 73, and the drying and filtering upper chamber 74 are each part of the drying channel, and the air inlet chamber 7, the airflow hole 68, the pores of the filter cotton 69, the annular channel 73, the drying and filtering upper chamber 74, the pores of the molecular sieve 6, the drying output chamber 9, and the air storage cylinder connecting chamber 8 are arranged in sequence.

[0094] Furthermore, the second outer casing 2 is also provided with an air intake channel 76 and a drain exhaust channel 75. The air intake chamber 7 is connected to the drain exhaust channel 75 through the air intake channel 76. The second valve port 17 is located between the drain exhaust channel 75 and the unloading chamber 16. The second part 20 of the second piston assembly 18 includes a pad 77, a first piston head 78 and a first spring 79. The inner wall of the unloading chamber 16 is provided with a second stepped surface 80. The edge of the pad 77 is stuck on the second stepped surface 80. The first spring 79 is located between the pad 77 and the first piston head 78. The side of the first piston head 78 is provided with an inclined surface 81. Compared with the direction of the second part 20 pointing to the first part 19, the inclined surface 81 is inclined at a preset angle. The end of the drain exhaust channel 75 away from the air intake channel 76 points to the inclined surface 81.

[0095] The usage of this embodiment is as follows:

[0096] Drying function:

[0097] like Figure 4 As shown, air enters through the air intake chamber 7, and the airflow passes through the airflow hole 68, the pores of the filter cotton 69, the annular channel 73, the upper drying and filtering chamber 74, the pores of the molecular sieve 6, and the drying output chamber 9. Then it is divided into two paths. One path goes through the air storage cylinder connecting chamber 8 to reach the regeneration air storage cylinder, and the other path pushes open the first piston assembly 15 to enter the four-way chamber 5.

[0098] The gas entering the four-way cavity 5 is divided into three paths. The first path enters the vehicle braking system through the braking system output channel 21, providing a clean gas source for the vehicle braking system.

[0099] Backflush regeneration function:

[0100] like Figure 5 As shown, in the second path: the gas in the four-way chamber 5 enters the pressure regulating chamber 12 through the pressure regulating channel 11, pushes open the first piston assembly 15, opens the first valve port 14, and the gas enters the control piston chamber 13. The gas acts on the upper surface of the second piston assembly 18, and the second piston assembly 18 moves downward, opening the second valve port 17. At this point, the air inlet chamber 7 and the unloading chamber 16 are directly connected. The high-pressure gas in the regeneration gas storage cylinder passes through the pores of the drying output chamber 9 and the molecular sieve 6, and then blows away the oil and water impurities on the molecular sieve 6. Then, the gas mixed with oil and water impurities continues to pass through the drying and filtering upper chamber 74, the annular channel 73, the filter cotton 69, the airflow hole 68, the air inlet channel 76, the drainage and exhaust channel 75, and the second valve port 17 to reach the unloading chamber 16 and then discharge.

[0101] The backflushing regeneration function in this embodiment allows residual oil, water, and other impurities from the air filtered by the molecular sieve 6 to be backflushed out and discharged through the unloading chamber 16, extending the service life of the molecular sieve 6 and better ensuring the cleanliness of the vehicle's air passage.

[0102] Voltage limiting function:

[0103] like Figure 6 As shown, the third path reaches the pressure limiting input chamber 24, which acts on the pressure limiting valve 23. As the intake air pressure rises, the pressure limiting valve 23 will close, and the pressure limiting input chamber 24 and the pressure limiting output chamber 25 will be cut off. The pressure in the pressure limiting output chamber 25 will no longer rise, thereby achieving the purpose of pressure limiting.

[0104] Overflow function:

[0105] like Figure 7 As shown, the gas in the pressure limiting output chamber 25 continues to descend and reaches the overflow input chamber 27 of the overflow valve 26. At this time, the overflow valve 26 is in the cut-off state. Only when the gas pressure in the pressure limiting output chamber 25 continues to rise and exceeds the cut-off limit of the overflow valve 26 will the overflow valve 26 open. The gas in the pressure limiting output chamber 25 will reach the overflow output chamber 28 through the overflow input chamber 27 and then be output through the outlet 29 of the suspended gas storage device.

[0106] The overflow function in this embodiment ensures that the air pressure in the pressure limiting output chamber 25 reaches a certain pressure before being output, thus guaranteeing the air pressure at the output port 29 of the suspended air storage device.

[0107] Air suspension control function:

[0108] like Figure 8 As shown, the gas reaching the overflow output chamber 28 also passes through the first channel 47 and waits below the first core 44 of the third moving valve core 43. When the air suspension control module 300 receives the intake signal from the ECU, the first electromagnet 36 drives the first moving iron core 37 to move upward, opening the first opening 33. The gas in the overflow output chamber 28 passes through the reserved pipe 34, the first opening 33, and the control channel 39 to reach the control chamber 40, pushing the second moving valve core 38 downward. The protrusion 41 pushes the third moving valve core 43 downward, opening the third valve port 42. The gas below the first core 44 reaches the middle channel 48 through the third valve port 42. Then, the second electromagnet 53 drives the second moving iron core 54 upward, the fourth moving valve core assembly 57 pushes open the output valve core assembly 51, and the fourth valve port 50 is opened. The gas reaches the first output port 61 of the air suspension through the fourth valve port 50, completing the process of inflating the air suspension airbag. After inflation is complete, de-energizing the first electromagnet 36 and the second electromagnet 53 will keep the air pressure at the first output port 61 constant.

[0109] like Figure 8 , Figure 9As shown, when it is necessary to vent the airbag, simply de-energize the first electromagnet 36, block the first opening 33 with the first moving iron core 37, drive the second moving iron core 54 upward with the second electromagnet 53, and push open the output valve core assembly 51 with the fourth moving valve core assembly 57, opening the fourth valve port 50. Then, the gas from the first output port 61 of the airbag passes through the fourth valve port 50, the middle channel 48, the first gap 63, the accommodating cavity 62, the air outlet 64, the upper channel 65, and arrives at the airbag control exhaust port 66 to be discharged into the atmosphere.

[0110] It is worth noting that the second moving valve core 38 can move up and down. During the inflation process of the airbag, the second moving valve core 38 moves downward, and the air outlet 64 is blocked by the inner wall of the first receiving cavity 30, so the gas cannot flow into the upward channel 65. During the deflation process of the airbag, the second moving valve core 38 moves upward, and the air outlet 64 separates from the inner wall of the first receiving cavity 30, so the air outlet 64 is opened and the gas flows into the upward channel 65.

[0111] Example 2

[0112] This embodiment proposes a trailer that includes the multi-functional integrated trailer device proposed in Embodiment 1.

[0113] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A multi-functional integrated device for trailers, characterized in that, The system includes an air handling module (100) for purifying the input air, a pressure-limiting overflow module (200) for regulating the air in the air handling module (100), and an air suspension control module (300) for controlling the vehicle's air suspension. The air handling module (100) has a housing consisting of a first housing (1) and a second housing (2). The first housing (1) is mounted on the second housing (2). The housing of the pressure-limiting overflow module (200) is a third housing (3). The housing of the air suspension control module (300) is a fourth housing (4). The third housing (3) is located between the second housing (2) and the fourth housing (4). The second housing (2), the third housing (3), and the fourth housing (4) are integrally formed. The second outer shell (2) has a four-way cavity (5) inside; The air handling suspension control integrated device is also equipped with a drying channel. A molecular sieve (6) is installed in the first outer shell (1), and an air inlet chamber (7), an air storage cylinder connection chamber (8), and a drying output chamber (9) are installed in the second outer shell (2). Along the setting path of the drying channel, the air inlet chamber (7), molecular sieve (6), drying output chamber (9), and air storage cylinder connection chamber (8) are arranged in sequence, and the air inlet chamber (7), molecular sieve (6), drying output chamber (9), and air storage cylinder connection chamber (8) are each part of the drying channel. In addition, the drying output chamber (9) is also connected to the four-way chamber (5). A first one-way valve (10) is set between the drying output chamber (9) and the four-way chamber (5). The first one-way valve (10) is used to unidirectionally guide the drying output chamber (9) toward the four-way chamber (5). The second outer casing (2) is also provided with a pressure regulating channel (11), a pressure regulating chamber (12), and a control piston chamber (13). The four-way chamber (5) and the pressure regulating chamber (12) are connected through the pressure regulating channel (11). The pressure regulating chamber (12) is located between the control piston chamber (13) and the pressure regulating channel (11). A first valve port (14) is provided between the pressure regulating chamber (12) and the control piston chamber (13). A movable first piston assembly (15) is provided in the pressure regulating chamber (12). The first piston assembly (15) is used to open or cut off the first valve port (14). The second outer shell (2) is provided with an unloading chamber (16) on the side away from the first outer shell (1). The second outer shell (2) is provided with a second valve port (17). The second valve port (17) is located between the air intake chamber (7) and the unloading chamber (16). The air intake chamber (7) and the unloading chamber (16) are connected or cut off by the opening and closing of the second valve port (17). It also includes a second piston assembly (18), which has a first part (19) and a second part (20). The first part (19) is movably disposed in the control piston chamber (13) and slides in a sealing contact with the inner wall of the control piston chamber (13). The second part (20) is used to open or shut off the second valve port (17). The second outer casing (2) is also provided with a brake system output channel (21), one end of which is connected to the four-way cavity (5), and the other end is used to supply air to the vehicle brake system; The air handling suspension control integrated device is also equipped with a pressure limiting overflow channel (22). One end of the pressure limiting overflow channel (22) is connected to the four-way cavity (5). The pressure limiting overflow channel (22) is equipped with a pressure limiting valve (23) and an overflow valve (26), which are used to limit the pressure and overflow the gas flowing through the four-way cavity (5), respectively. The gas that has passed through the pressure limiting overflow channel (22) and has not been discharged continues to be transported to the suspension control module (300).

2. The trailer multi-functional integrated device according to claim 1, characterized in that: The third outer shell (3) is also provided with a pressure limiting input cavity (24) and a pressure limiting output cavity (25). The pressure limiting input cavity (24) and the pressure limiting output cavity (25) are respectively a part of the pressure limiting overflow channel (22). The pressure limiting input cavity (24) is located at one end of the pressure limiting overflow channel (22). The pressure limiting input cavity (24) is connected to the four-way cavity (5) in the pressure limiting overflow channel (22). The pressure limiting overflow module (200) includes a pressure limiting valve (23), which is fixedly installed with the third housing (3). The pressure limiting valve (23) is located between the pressure limiting input chamber (24) and the pressure limiting output chamber (25) and is used to connect or disconnect the pressure limiting input chamber (24) and the pressure limiting output chamber (25). The third outer shell (3) is provided with an overflow inlet chamber (27) and an overflow outlet chamber (28). The overflow inlet chamber (27) and the overflow outlet chamber (28) are each part of the pressure-limiting overflow channel (22). The overflow inlet chamber (27) and the pressure-limiting outlet chamber (25) are connected. The bottom of the third outer shell (3) is also provided with an outlet port (29) of the suspended gas storage device. The overflow outlet chamber (28) is connected to the outlet port (29) of the suspended gas storage device. The pressure limiting overflow module (200) also includes an overflow valve (26), which is fixedly installed with the third housing (3). The overflow valve (26) is located between the overflow input chamber (27) and the overflow output chamber (28) and is used to connect or disconnect the overflow input chamber (27) and the overflow output chamber (28).

3. The trailer multi-functional integrated device according to claim 2, characterized in that: The fourth outer shell (4) is provided with a first receiving cavity (30), the first receiving cavity (30) is provided with a first moving valve core (31), the first moving valve core (31) is provided with a gas storage cavity (32), the surface of the first moving valve core (31) forms a first opening (33), one end of the gas storage cavity (32) is connected to the first opening (33); the fourth outer shell (4) is also provided with a reserved pipe (34), the other end of the gas storage cavity (32) is connected to the overflow output cavity (28) through the reserved pipe (34); a control channel (39) is also provided on one side of the first moving valve core (31); The fourth outer shell (4) is also provided with a first iron core channel (35), which is connected to the first receiving cavity (30). The first iron core channel (35) is provided with a first electromagnet (36) and a first moving iron core (37). The first electromagnet (36) is used to drive the first moving iron core (37) to move toward the first electromagnet (36) after being energized. The movable first moving iron core (37) is used to open or cut off the first opening (33). A second moving valve core (38) is also provided in the first receiving cavity (30). The first moving valve core (31) is located between the second moving valve core (38) and the first moving iron core (37). The second moving valve core (38) slides and seals against the cavity side wall of the first receiving cavity (30). This part of the first receiving cavity (30) between the first moving valve core (31) and the second moving valve core (38) is defined as the control cavity (40). The control channel (39) is provided between the control cavity (40) and the first opening (33). The second moving valve core (38) has a protruding foot (41) on the side away from the first moving valve core (31). A third moving valve core (43) is provided at the bottom of the first receiving cavity (30). The third moving valve core (43) includes a first core body (44) and a first moving spring (45). The first core body (44) is provided with a first protrusion (46). One end of the first moving spring (45) abuts against the bottom wall of the cavity of the first receiving cavity (30), and the other end abuts against the lower surface of the first protrusion (46). The protruding foot (41) is used to push the first protrusion (46) to move against the first moving spring (45). A third valve port (42) is also provided in the first receiving cavity (30). The third valve port (42) is located between the first convex eave (46) and the convex foot (41). The upper surface of the first convex eave (46) can open or cut off the third valve port (42). The fourth outer shell (4) is also provided with a first channel (47), one end of which is connected to the overflow output chamber (28), and the other end points to the third valve port (42); the first channel (47) and the third valve port (42) are respectively a part of the pressure limiting overflow channel (22); The fourth outer casing (4) is also provided with a central channel (48), one end of which is connected to the third valve port (42); The fourth housing (4) is also provided with an open-air output chamber (49) and a fourth valve port (50), the fourth valve port (50) being located between the open-air output chamber (49) and the middle channel (48); a movable output valve core assembly (51) is provided inside the open-air output chamber (49), the output valve core assembly (51) being used to open or shut off the fourth valve port (50). The fourth housing (4) is provided with a second iron core channel (52), and a second electromagnet (53) and a second moving iron core (54) are provided in the second iron core channel (52). The second electromagnet (53) is used to attract the second moving iron core (54) to move toward the second electromagnet (53) after being energized. The fourth housing (4) is also provided with a second receiving cavity (55), which is connected to the second iron core channel (52). The second receiving cavity (55) is provided with a fourth moving valve core assembly (57). The output valve core assembly (51) includes a second core (58) and a second moving spring (59). The second core (58) has a second protrusion (60) on the side facing the fourth moving valve core assembly (57). One end of the second moving spring (59) abuts against the bottom wall of the second receiving cavity (55), and the other end abuts against the second protrusion (60). The fourth valve port (50) is located between the fourth moving valve core assembly (57) and the second protrusion (60). The fourth outer shell (4) has a suspended first output port (61) on one side, which is connected to the suspended output cavity (49).

4. The trailer multi-functional integrated device according to claim 3, characterized in that: The second moving valve core (38) is provided with a receiving cavity (62), and the side of the second moving valve core (38) is provided with an air outlet (64). During the movement of the second moving valve core (38), the air outlet (64) is opened or cut off by the inner wall of the first receiving cavity (30). A first gap (63) is provided between the protrusion (41) of the second moving valve core (38) and the side wall of the first receiving cavity (30), and the receiving cavity (62) is located between the air outlet (64) and the first gap (63); an upper channel (65) is provided inside the fourth outer shell (4), and the air outlet (64) is located between the second receiving cavity (55) and the upper channel (65); An air suspension control exhaust port (66) is provided on one side of the fourth housing (4), and the upper channel (65) is connected to the air suspension control exhaust port (66).

5. The trailer multi-functional integrated device according to any one of claims 1-4, characterized in that: It also includes a base (67), which is fixedly connected to the first outer shell (1). The base (67) is located between the molecular sieve (6) and the air inlet chamber (7). The base (67) is provided with an airflow hole (68). It also includes filter cotton (69), which is disposed on the base (67); It also includes a baffle (70), which has a bent portion (71) and a straight portion (72). The bent portion (71) is located between the airflow hole (68) and the filter cotton (69). The bent portion (71) is used to guide the gas from the airflow hole (68) toward the filter cotton (69) and to cut off the gas from the airflow hole (68) toward the molecular sieve (6). The inner wall of the straight portion (72) wraps around the circumferential outer surface of the molecular sieve (6), and an annular channel (73) is provided between the outer surface of the straight portion (72) and the inner wall of the first outer shell (1). The first outer shell (1) is a barrel-shaped structure. A drying and filtering upper chamber (74) is provided between the upper surface of the molecular sieve (6) and the inner bottom wall of the first outer shell (1). The drying and filtering upper chamber (74) is connected to the annular channel (73). The airflow hole (68), the pores of the filter cotton (69), the annular channel (73), and the upper drying filter chamber (74) are each part of the drying channel. The air inlet chamber (7), the airflow hole (68), the pores of the filter cotton (69), the annular channel (73), the upper drying filter chamber (74), the pores of the molecular sieve (6), the drying output chamber (9), and the gas storage cylinder connection chamber (8) are arranged in sequence.

6. The trailer multi-functional integrated device according to claim 5, characterized in that: The second outer shell (2) is also provided with an air intake channel (76) and a drainage and exhaust channel (75). The air intake chamber (7) is connected to the drainage and exhaust channel (75) through the air intake channel (76). The second valve port (17) is located between the drainage and exhaust channel (75) and the unloading chamber (16). The second part (20) of the second piston assembly (18) includes a pad (77), a first piston head (78) and a first spring (79). The inner wall of the unloading chamber (16) is provided with a second stepped surface (80). The edge of the pad (77) is stuck on the second stepped surface (80). The first spring (79) is disposed between the pad (77) and the first piston head (78). The side of the first piston head (78) is provided with an inclined surface (81). Compared with the direction of the second part (20) pointing to the first part (19), the inclined surface (81) is inclined at a preset angle, and the end of the drain exhaust channel (75) away from the intake channel (76) points to the inclined surface (81).

7. A trailer, characterized in that, Includes the trailer multi-functional integrated device as described in any one of claims 1-6.

Images