Air suspension dryer

Abstract

This utility model discloses an air-suspension dryer, aiming to solve the problem of poor sealing effect in traditional dryers during the heating process, which affects the sealing performance and heating effect of the dryer itself. The air-suspension dryer of this utility model includes a dryer body, a heating component, and a heat insulation cover. The dryer body and the heating component are located inside the heat insulation cover. The heating component includes a first insulating layer, a heating resistance layer, and a second insulating layer, which are sequentially disposed on the outside of the dryer body. The heating resistance layer is connected to an external circuit, and a gap is provided between the second insulating layer and the heat insulation cover. By directly sintering or attaching the heating component to the outside of the dryer body, a high degree of integration of heating and drying functions is achieved. The external heating component avoids changing the initial structure of the dryer body, ensuring the sealing performance of the dryer body. It facilitates overall layout design and also helps reduce production and assembly costs.

Description

Technical Field

[0001] This utility model relates to the field of automotive air suspension technology, and in particular to an air suspension dryer. Background Technology

[0002] In existing air suspension systems, a dryer is required to process the air. Due to the limited space in passenger vehicles, this structure is often designed as a non-replaceable unit. To heat the air, heating elements need to be installed on the dryer.

[0003] Existing solutions often involve directly adding heating elements inside the dryer and using external wiring harnesses for temperature control. During operation, the internal pressure of the dryer can reach 3.5 MPa. Adding heating elements necessitates external wiring harnesses, leading to poor airtightness and impacting the dryer's performance and heating efficiency. Utility Model Content

[0004] (I) Purpose of the utility model

[0005] The purpose of this invention is to provide an air suspension dryer that addresses the problem of poor sealing during the heating process of traditional dryers, which affects the dryer's sealing performance and heating effect.

[0006] (II) Technical Solution

[0007] To solve the above problems, this utility model provides an air suspension dryer, including a dryer body, a heating component and a heat insulation cover, wherein the dryer body and the heating component are located inside the heat insulation cover;

[0008] The heating assembly includes a first insulating layer, a heating resistance layer, and a second insulating layer. The first insulating layer, the heating resistance layer, and the second insulating layer are sequentially disposed on the outside of the dryer body. The heating resistance layer is connected to an external circuit, and a gap is provided between the second insulating layer and the heat insulation cover.

[0009] Preferably, the air suspension dryer further includes a connector terminal, and the heating assembly further includes a limiting ring. The connector terminal passes through the heat insulation cover and is connected to the limiting ring. The connector terminal is electrically connected to the heating resistor layer. The limiting ring is located outside the second insulation layer, and the outside of the limiting ring is connected to the inside of the heat insulation cover.

[0010] Preferably, the heating component further includes a negative temperature coefficient thermistor, and the connector terminal is connected to the heating resistor layer through the negative temperature coefficient thermistor.

[0011] Preferably, a protrusion is formed on the outer periphery of the heat insulation cover, and a limiting channel is formed on the inner side of the protrusion. The limiting channel is adapted to the limiting ring, and a through hole is formed through the protrusion. The connector terminal passes through the through hole and is connected to the heating resistor layer.

[0012] Preferably, the air suspension dryer further includes a mounting assembly that passes through the heat shield and is connected to the dryer body.

[0013] Preferably, the mounting component has mounting holes, and the mounting holes have buffer portions.

[0014] Preferably, the dryer body includes an air inlet assembly, a drying assembly, an air outlet assembly, and a tank. The air inlet assembly is connected to the air outlet assembly through the drying assembly. The drying assembly is disposed in the tank. The air inlet assembly includes a first connector seat, and the air outlet assembly includes a second connector seat.

[0015] Preferably, the air intake assembly includes a guide plate and a first steel mesh. An air intake hole is formed on the guide plate and communicates with the first connector seat. The first steel mesh is located downstream of the guide plate and is provided with a wind baffle plate, which corresponds to the air intake hole.

[0016] Preferably, the air outlet assembly includes a second steel mesh and a spring. The second steel mesh is disposed on the downstream side of the drying assembly, one end of the spring is connected to the second steel mesh, and the other end of the spring is connected to the inner arm of the tank.

[0017] Preferably, the drying assembly has a first felt plate and a second felt plate at both ends, with the first felt plate located downstream of the first steel mesh and the second felt plate located upstream of the second steel mesh.

[0018] (III) Beneficial Effects

[0019] The above-mentioned technical solution of this utility model has the following beneficial technical effects:

[0020] 1. By directly sintering or attaching the heating components to the outside of the dryer body, a high degree of integration between heating and drying functions is achieved. This integrated design eliminates the need for additional heating pipe installation space and complex internal wiring, resulting in a very compact overall structure. Simultaneously, the external heating components avoid altering the initial structure of the dryer body, ensuring its sealing performance. This facilitates overall layout design and also helps reduce production and assembly costs.

[0021] 2. By setting up a heat insulation cover and creating an air gap between it and the second insulation layer, heat loss through radiation and convection is effectively blocked. This structure allows heat to be concentrated on heating the air flowing through the dryer body, significantly improving thermal efficiency, reducing energy consumption, and meeting vehicle energy-saving requirements.

[0022] 3. The dual insulation design of the first and second insulation layers ensures complete electrical isolation between the heating resistor layer and the main metal shell of the dryer and the external environment. This avoids the risk of electric shock or electrical interference caused by current leakage. Simultaneously, the insulation layer buffers the impact of vibration and friction on the heating resistor layer, preventing short circuits due to physical damage and ensuring long-term stable operation of the heating components. Furthermore, the second insulation layer effectively protects the heating resistor layer from damage by moisture, dust, and mechanical abrasion, extending the service life of the heating components and improving the reliability of the entire dryer in harsh vehicle environments. Attached Figure Description

[0023] Figure 1 This is an exploded schematic diagram of an air suspension dryer provided by this utility model;

[0024] Figure 2 This is a schematic diagram of the overall structure of an air suspension dryer provided by this utility model;

[0025] Figure 3 This is a cross-sectional view of an air suspension dryer provided by this utility model;

[0026] Figure 4 This is an exploded schematic diagram of the heating assembly of an air suspension dryer according to the present invention;

[0027] Figure 5 yes Figure 4 A schematic enlarged view of part A in the middle;

[0028] Figure 6 This is a schematic diagram of the internal structure of an air suspension dryer according to the present invention;

[0029] Figure 7 This is an exploded schematic diagram of the dryer body of an air suspension dryer provided by this utility model.

[0030] Figure label:

[0031] 1. Dryer body;

[0032] 11. Intake assembly; 111. First connector seat; 112. Deflector; 113. First steel mesh;

[0033] 12. Drying components;

[0034] 13. Air outlet assembly; 131. Second connector seat; 132. Second steel mesh; 133. Spring;

[0035] 14. Tank body; 141. Upper end cover; 142. Lower end cover;

[0036] 15. First felt board;

[0037] 16. Second felt board;

[0038] 2. Heating component; 21. First insulating layer; 22. Heating resistor layer; 23. Second insulating layer; 24. Limiting ring; 25. Negative temperature coefficient thermistor; 26. Conductor layer;

[0039] 3. Heat insulation cover; 31. Protrusion; 31a. Limiting channel; 31b. Through hole;

[0040] 4. Connector terminals;

[0041] 5. Mounting components; 5a. Mounting holes; 51. First bracket; 52. Second bracket;

[0042] 6. Buffer section. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0044] The accompanying drawings show schematic diagrams of layer structures according to embodiments of the present invention. These drawings are not to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0045] Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0046] In the description of this utility model, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0047] Combination Figures 1 to 7 This utility model provides an air suspension dryer, including a dryer body 1, a heating component 2, and a heat insulation cover 3. The dryer body 1 and the heating component 2 are located inside the heat insulation cover 3. The heating component 2 includes a first insulating layer 21, a heating resistance layer 22, and a second insulating layer 23. The first insulating layer 21, the heating resistance layer 22, and the second insulating layer 23 are sequentially disposed on the outside of the dryer body 1. The heating resistance layer 22 is connected to an external circuit, and a gap is provided between the second insulating layer 23 and the heat insulation cover 3.

[0048] Specifically, the dryer body 1 is used for air drying and circulation, and contains a desiccant to adsorb moisture in the air. The heating component 2 achieves electrothermal conversion through a multi-layered structure consisting of a first insulating layer 21, a heating resistor layer 22, and a second insulating layer 23. The first insulating layer 21 ensures electrical isolation between the heating resistor layer 22 and the dryer body 1, preventing short circuits; the heating resistor layer 22 generates heat after being energized, heating the dryer body 1; the second insulating layer 23 protects the heating resistor layer 22 from damage by the external environment, while also preventing direct contact between the heating resistor layer 22 and the heat insulation cover 3, achieving electrical isolation. The heat insulation cover 3 encloses the dryer body 1 and the heating component 2, and the air gap between it and the second insulating layer 23 forms a heat insulation layer, reducing heat loss and improving thermal efficiency.

[0049] During operation, an external current is input to the heating resistor layer 22. The resistor layer generates heat, which is conducted to heat the dryer body 1. The humid air inside the dryer body 1 is heated and dried as it flows through it.

[0050] By directly sintering or attaching the heating component 2 to the outside of the dryer body 1, a high degree of integration of heating and drying functions is achieved. This integrated design eliminates the need for additional heating pipe installation space and complex internal wiring, resulting in a very compact overall structure. Simultaneously, the external heating component 2 avoids altering the initial structure of the dryer body 1, ensuring its sealing performance. This facilitates overall layout design and also helps reduce production and assembly costs. By setting up a heat insulation cover 3 and creating an air gap between it and the second insulation layer 23, heat loss through radiation and convection is effectively blocked. This structure allows heat to be concentrated on heating the air flowing through the dryer body 1, significantly improving thermal efficiency, reducing energy consumption, and meeting vehicle energy-saving requirements. The double insulation design of the first insulation layer 21 and the second insulation layer 23 ensures complete electrical isolation between the heating resistor layer 22 and the metal shell of the dryer body 1 and the external environment. This avoids the risk of electric shock or electrical interference caused by current leakage; at the same time, the insulation layer buffers the impact of vibration and friction on the heating resistor layer 22, preventing short circuits due to physical damage and ensuring long-term stable operation of the heating component 2. In addition, the second insulation layer 23 can effectively protect the heating resistor layer 22 from damage caused by moisture, dust and mechanical abrasion, extend the service life of the heating component 2, and improve the reliability of the entire dryer in harsh vehicle environments.

[0051] The specific method of external current input to the heating resistor layer 22 is not limited here. It can be achieved by directly setting a conductive wire through the heat insulation cover 3 to power the heating resistor layer 22, or by setting a connector on the heat insulation cover 3, allowing the external conductive wire to be quickly plugged in and out of the connector, which is electrically connected to the heating resistor layer 22. In a preferred embodiment, the air suspension dryer also includes a connector terminal 4, and the heating assembly 2 includes a limiting ring 24. The connector terminal 4 passes through the heat insulation cover 3 and connects to the limiting ring 24, and the connector terminal 4 is electrically connected to the heating resistor layer 22. The limiting ring 24 is located outside the second insulating layer 23, and the outer side of the limiting ring 24 is connected to the inner side of the heat insulation cover 3.

[0052] Specifically, connector terminal 4 serves as an electrical interface, connecting the external power supply to the internal heating resistor layer 22. The limiting ring 24, as a ring-shaped or frame-like component fixed outside the second insulation layer 23, provides precise installation positioning and mechanical support for connector terminal 4, while simultaneously fixing the first insulation layer 21, heating resistor layer 22, and second insulation layer 23 to the dryer body 1, ensuring the integrity of the heating assembly. After penetrating the heat insulation cover 3 from the outside, connector terminal 4 achieves electrical and mechanical connection with the limiting ring 24. Current is transmitted to the heating resistor layer 22 through the terminal. The connection between the limiting ring 24 and the inner side of the heat insulation cover 3 can be a snap-fit, threaded, or interference fit, ensuring the stability of the electrical connection and assisting in positioning the heat insulation cover 3.

[0053] It should be noted that the specific structure of the heat insulation cover 3 and the limiting ring 24 is not limited here, nor is the way the gap between the second insulating layer 23 and the heat insulation cover 3 is formed. Multiple support points can be provided inside the heat insulation cover 3 to ensure that the heat insulation cover 3 does not contact the second insulating layer 23. In a preferred embodiment, a protrusion 31 is formed on the outer periphery of the heat insulation cover 3, and a limiting channel 31a is formed on the inner side of the protrusion 31. The limiting channel 31a is adapted to the limiting ring 24, and a through hole 31b is formed through the protrusion 31, through which the connector terminal 4 passes and connects to the heating resistor layer 22.

[0054] Specifically, the protrusion 31, as an outwardly protruding structure on the heat insulation cover 3, is used to accommodate other structures of the heating element and provides a base for the installation and positioning of the connector terminal 4. The limiting channel 31a, located inside the protrusion 31, is a groove or track whose shape matches the limiting ring 24. The through hole 31b allows the connector terminal 4 to pass through. The limiting ring 24, made of insulating material, is precisely embedded in the limiting channel 31a of the protrusion 31. This achieves radial and circumferential positioning between the heat insulation cover 3 and the heating element 2. Simultaneously, the thickness of the limiting ring 24 can be set to be greater than the depth of the limiting channel 31a; that is, after the limiting ring 24 is installed in the limiting channel 31a, the inner side of the limiting ring 24 is outside the limiting channel 31a. In this case, the limiting ring 24 effectively supports the heat insulation cover 3, leaving a gap between the heat insulation cover 3 and the second insulating layer 23.

[0055] This configuration, using the limiting ring 24 as an intermediary for connection, provides a precise support base for the connector terminal 4, avoiding potential loosening, detachment, or poor sealing issues that might occur if the terminal is directly installed on the thin wall of the heat shield 3. This structure effectively resists continuous vibration during vehicle operation, ensuring the long-term stability of the electrical connection. Simultaneously, the tight fit between the limiting ring 24 and the heat shield 3, along with the treatment at the point where the connector terminal 4 passes through (e.g., using a sealing ring or potting compound), forms a sealing barrier, preventing moisture and dust from entering from the interface and protecting the internal circuitry. Furthermore, through the limiting channel 31a and the limiting ring 24, during heat shield 3 installation, the operator can quickly align and push the limiting ring 24 into the limiting channel 31a, achieving precise circumferential and radial positioning and ensuring automatic alignment of the connector terminal 4 with the through hole 31b. This simplifies the assembly process, reduces adjustment time, and improves production efficiency and assembly consistency. In addition, the design of the protrusion 31 is equivalent to adding a reinforcing structure to the weak points of the heat shield 3; the protrusion 31 is preferably located at the center of the heat shield 3. The limiting channel 31a surrounds and supports the limiting ring 24, effectively transferring the forces acting on the connector terminal 4 to the protrusion 31 and even a larger area of ​​the entire heat insulation cover 3. This enhances the rigidity of the connection point and the overall resistance to deformation, effectively suppressing loosening and abnormal noise caused by vibration, and ensuring the long-term reliability of the electrical connection. The limiting channel 31a and the limiting ring 24 ensure the gap between the heat insulation cover 3 and the second insulation layer 23, improving the overall structural compactness. Simultaneously, an air insulation layer is formed, further hindering heat loss to the outside and improving heating efficiency.

[0056] In a preferred embodiment, the heating component 2 further includes a negative temperature coefficient thermistor 25, and the connector terminal 4 is connected to the heating resistance layer 22 through the negative temperature coefficient thermistor 25.

[0057] Specifically, the negative temperature coefficient thermistor 25 (NTC) acts as a temperature sensor, with its resistance decreasing as the temperature rises. The NTC is connected in series with the heating resistor layer 22 in the circuit. The system controller indirectly and accurately senses the real-time temperature of the heating area by detecting the change in the resistance value of the NTC, and dynamically adjusts the power supplied to the heating resistor layer 22 accordingly to achieve constant temperature control or overheat protection.

[0058] With this setup, the integrated NTC provides real-time temperature feedback, allowing the device's control system to form a closed-loop circuit and achieve precise modulation of the heating temperature. This avoids underheating or overheating, ensuring the dryer always operates within its optimal temperature range and guaranteeing consistent drying results. Furthermore, when an abnormal temperature rise is detected, exceeding a preset safety threshold (e.g., due to control malfunction, airflow interruption, or dry burning), the controller can immediately cut off the power, preventing damage to the heating element 2 and the dryer body 1 from overheating, and preventing potential safety accidents. This enhances the product's safety and reliability.

[0059] It should be noted that the specific connection method between connector terminal 4 and NTC is not limited here; they can be directly connected via wires. In a preferred embodiment, a conductor layer 26 is provided outside the second insulating layer 23, and connector terminal 4 is electrically connected to conductor layer 26. Conductor layer 26 is connected to heating resistor layer 22 via NTC.

[0060] Specifically, the conductor layer 26 is made of a low-resistivity material, such as metallic silver. The conductor layer 26 is sintered between the second insulating layer 23 and the heating resistor layer 22 to achieve the connection between the connector terminal 4 assembly and NYC. This allows current to be efficiently transmitted to the heating resistor layer 22, while the conductor layer itself generates almost no heat due to its low resistivity, ensuring the reliability of the electrical connection.

[0061] In a preferred embodiment, the air suspension dryer also includes a mounting assembly 5 that passes through the heat insulation cover 3 and is connected to the dryer body 1.

[0062] Specifically, mounting component 5 typically includes bolts, brackets, etc., used to secure the entire dryer assembly to the vehicle frame or subframe. One end of mounting component 5 is securely connected to a robust part of the dryer body 1, and the other end passes through a pre-drilled hole in the heat shield 3, ultimately connecting to the vehicle body. The heat shield 3 itself does not primarily bear weight; rather, it is confined to the outside of the dryer body 1 by mounting component 5.

[0063] The specific structure of the mounting component 5 is not limited here. Optionally, the mounting component 5 includes a first bracket 51 and a second bracket 52, respectively disposed at the upper and lower ends of the dryer body 1 and distributed on the left and right sides, as shown below. Figure 1 As shown, the first bracket 51 forms two connection points with the bottom of the dryer body 1, and is fixedly connected to the outer side wall and bottom wall of the dryer body 1 respectively; the second bracket 52 forms three connection points with the dryer body 1 near the top, two of which are located in the same vertical direction and are fixedly connected to the outer side wall of one side of the dryer body 1, and the other connection point intersects with the first two and is fixedly connected to the outer side wall of the dryer body 1.

[0064] In a preferred embodiment, the mounting component 5 is provided with a mounting hole 5a, and a buffer portion 6 is provided inside the mounting hole 5a.

[0065] Specifically, mounting holes 5a are located on the brackets of mounting assembly 5, for example, formed at the ends of the first bracket 51 and the second bracket 52, for connecting to the vehicle body via bolts. A buffer portion 6 snaps into the mounting hole 5a. After installation, the buffer portion 6 is fitted onto the mounting bolts. Here, the buffer portion 6 can be a rubber bushing or an elastomer within the mounting hole 5a. The buffer portion 6 is located between the metal bracket and the vehicle body mounting surface. It utilizes the deformation of the elastic material to absorb and attenuate high-frequency vibrations transmitted from the vehicle body and isolate low-frequency, large-amplitude impacts, preventing these mechanical energies from being directly and completely transmitted to the dryer assembly.

[0066] This configuration, where mounting component 5 is directly connected to the robust dryer body 1, ensures that all vibrations and impacts generated during vehicle operation are borne and transmitted by the strongest core component. The heat shield 3 serves only as a cover, avoiding bearing the primary structural loads and thus preventing deformation, cracking, or fatigue damage due to stress, protecting its insulation function and aesthetic integrity. Mounting component 5 passes through the heat shield 3, but a gap or cushioning material is typically present between them. This interrupts the path of vibration transmission from the dryer body 1 directly to the heat shield 3 via rigid contact, improving vehicle ride comfort.

[0067] Furthermore, the buffer section 6 effectively filters out high-frequency fine vibrations and larger impacts from the road surface, significantly reducing the vibration energy transmitted to the dryer assembly. This not only protects the delicate internal structure of the dryer but also reduces the amount of noise transmitted into the vehicle cabin from the dryer as a sound source. By attenuating input stress, the buffer section 6 provides a relatively stable operating environment for the entire dryer, effectively extending the service life of the desiccant and the reliability of all components, ensuring long-term stability of drying efficiency.

[0068] In a preferred embodiment, the dryer body 1 includes an air inlet assembly 11, a drying assembly 12, an air outlet assembly 13, and a tank 14. The air inlet assembly 11 is connected to the air outlet assembly 13 through the drying assembly 12. The drying assembly 12 is disposed inside the tank 14. The air inlet assembly 11 includes a first connector seat 111, and the air outlet assembly 13 includes a second connector seat 131.

[0069] Specifically, the intake assembly 11 guides humid air in, and the first connector 111 connects to the intake pipe; the drying assembly 12 contains a desiccant that adsorbs moisture in the air; the exhaust assembly 13 discharges the dried air, and the second connector 131 connects to the exhaust pipe; the tank 14 includes an upper end cover 141 and a lower end cover 142, forming the main pressure vessel of the dryer. Humid compressed air enters through the first connector 111, is dehydrated as it flows through the drying assembly 12, and finally flows out through the second connector 131 to supply the air suspension system. The first and second connectors 111 and the intake and exhaust pipes are manufactured using standard pipe fittings and a base produced by computer numerical control (CNC) machining, enhancing the overall airtightness and enabling it to withstand a high pressure of 3.5 MPa, ensuring the basic performance of the dryer.

[0070] With this configuration, the intake assembly 11 can focus on airflow distribution and pre-separation, the drying assembly 12 on adsorption efficiency and lifespan, and the exhaust assembly 13 on preventing desiccant loss. A clearly defined airflow path ensures sufficient and uniform contact between air and desiccant, avoiding airflow short-circuiting or dead zones, thereby achieving the highest drying efficiency.

[0071] In a preferred embodiment, the air intake assembly 11 includes a guide plate 112 and a first steel mesh 113. An air intake hole is formed on the guide plate 112 and communicates with the first connector seat 111. The first steel mesh 113 is located downstream of the guide plate 112 and is provided with a baffle plate, which corresponds to the air intake hole.

[0072] Specifically, the guide plate 112 guides the airflow direction and has specific air inlets; the first steel mesh 113 supports the drying assembly 12 and achieves uniform airflow; the baffle plate is located on the first steel mesh 113, preferably positioned at the center of the circular first steel mesh 113, directly opposite the air inlets. High-speed humid air enters from the first connector seat 111 and impacts the guide plate 112. The guide plate 112 converts its kinetic energy into pressure energy and initially distributes the airflow. After passing through the air inlets, the airflow directly impacts the baffle plate, which disperses the concentrated airflow, making it a uniform, low-speed airflow, which then smoothly enters the drying assembly 12 through the first steel mesh 113.

[0073] This configuration, with the guide vane 112 and the first steel mesh 113 with baffles, ensures that the airflow is evenly distributed across the entire cross-section of the desiccant. This uniform distribution allows all the desiccant within the drying assembly 12 to participate in adsorption, improving drying efficiency and resulting in more stable dryness of the outlet air. The baffle structure directly targets the area where the airflow is most concentrated, dissipating and dispersing its kinetic energy, thus slowing down the subsequent airflow velocity that comes into contact with the desiccant. This reduces desiccant wear and pulverization, significantly extending the desiccant's service life and replacement cycle, and lowering maintenance costs.

[0074] In a preferred embodiment, the venting assembly 13 includes a second steel mesh 132 and a spring 133. The second steel mesh 132 is disposed downstream of the drying assembly 12. One end of the spring 133 is connected to the second steel mesh 132, and the other end of the spring 133 is connected to the inner arm of the tank body 14.

[0075] Specifically, the second steel mesh 132 is located downstream of the drying assembly 12 to prevent desiccant particles from being carried away by the airflow; the spring 133 provides continuous clamping force. The spring 133 is compressed between the upper end cover 141 and the second steel mesh 132 of the tank body 14. Its elasticity passes through the second steel mesh 132, the drying assembly 12, the first steel mesh 113, the guide plate 112, and the lower end cover 142, thereby continuously pressing the entire drying assembly 12 into a pre-tightened state. Furthermore, a mounting groove is provided in the upper end cover 141, and the end of the spring 133 engages with the mounting groove to ensure the stability of the spring 133.

[0076] With this setup, under the impact of airflow, especially pulsed airflow, the desiccant particle bed in the drying assembly 12 easily follows the airflow, causing intense friction between particles and pulverization. Fine powder may be carried away by the airflow, clogging downstream valves or airbags. The continuous clamping force provided by spring 133 increases the friction between particles, raising the critical airflow velocity required for fluidization, thereby effectively suppressing fluidization, preventing desiccant loss and pulverization, and ensuring long-term reliable operation of the system. During long-term use and multiple adsorption / desorption cycles, the desiccant may experience slight wear and volume shrinkage, causing internal components to loosen, generating noise under vehicle vibration, and even leading to component misalignment. The preload of spring 133 automatically compensates for these minute volume changes, always ensuring tight contact of all internal components, forming a stable whole, eliminating abnormal noise and potential performance degradation caused by gaps. Furthermore, the dimensional tolerances of the internal components can be appropriately relaxed due to the spring 133 clamping structure. During assembly, simply compressing spring 133 to the predetermined position is sufficient; it can automatically adapt to small cumulative dimensional deviations within a set of components. This reduces the stringent requirements for the precision of individual parts, simplifies the assembly process, and improves production efficiency and product qualification rate.

[0077] In a preferred embodiment, the drying assembly 12 is provided with a first felt plate 15 and a second felt plate 16 at both ends, with the first felt plate 15 located downstream of the first steel mesh 113 and the second felt plate 16 located upstream of the second steel mesh 132.

[0078] Specifically, the first felt board 15 and the second felt board 16 are made of soft, porous fibrous material and are located between the steel mesh and the desiccant. The felt board is sandwiched between the rigid steel mesh and the desiccant particles. It acts as a soft buffer layer while also helping to filter impurities from the airflow.

[0079] This design allows desiccant particles to come into direct contact with the rigid metal mesh. Under vehicle vibration and airflow impact, the contact points generate extremely high contact stress, causing the particles to be crushed and ground. The soft felt sheet greatly increases the contact area, and its fibrous structure absorbs and disperses this stress, reducing friction and pulverization, and extending the desiccant's lifespan. The dense, porous fibrous structure of the felt sheet effectively intercepts these micron-sized powder particles, preventing them from passing through the mesh into the air outlet pipe. This avoids malfunctions caused by valve jamming and airbag wear, improving the reliability of the entire air suspension system.

[0080] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. An air suspension dryer, characterized in that, It includes a dryer body (1), a heating assembly (2) and a heat insulation cover (3), wherein the dryer body (1) and the heating assembly (2) are located inside the heat insulation cover (3); The heating component (2) includes a first insulating layer (21), a heating resistance layer (22), and a second insulating layer (23). The first insulating layer (21), the heating resistance layer (22), and the second insulating layer (23) are sequentially disposed on the outside of the dryer body (1). The heating resistance layer (22) is connected to an external circuit, and a gap is provided between the second insulating layer (23) and the heat insulation cover (3).

2. The air suspension dryer according to claim 1, characterized in that, The air suspension dryer also includes a connector terminal (4), and the heating assembly (2) also includes a limiting ring (24). The connector terminal (4) passes through the heat insulation cover (3) and is connected to the limiting ring (24). The connector terminal (4) is electrically connected to the heating resistance layer (22). The limiting ring (24) is located outside the second insulation layer (23). The outer side of the limiting ring (24) is connected to the inner side of the heat insulation cover (3).

3. The air suspension dryer according to claim 2, characterized in that, The heating component (2) also includes a negative temperature coefficient thermistor (25), and the connector terminal (4) is connected to the heating resistance layer (22) through the negative temperature coefficient thermistor (25).

4. The air suspension dryer according to claim 2, characterized in that, The heat insulation cover (3) has a protrusion (31) on its outer periphery, and a limiting channel (31a) is formed on the inner side of the protrusion (31). The limiting channel (31a) is adapted to the limiting ring (24). A through hole (31b) is formed through the protrusion (31), and the connector terminal (4) passes through the through hole (31b) and is connected to the heating resistor layer (22).

5. The air suspension dryer according to claim 1, characterized in that, The air suspension dryer also includes a mounting assembly (5) that passes through the heat shield (3) and is connected to the dryer body (1).

6. The air suspension dryer according to claim 5, characterized in that, The mounting component (5) is provided with a mounting hole (5a), and a buffer part (6) is provided inside the mounting hole (5a).

7. The air suspension dryer according to claim 1, characterized in that, The dryer body (1) includes an air inlet assembly (11), a drying assembly (12), an air outlet assembly (13), and a tank (14). The air inlet assembly (11) is connected to the air outlet assembly (13) through the drying assembly (12). The drying assembly (12) is disposed inside the tank (14). The air inlet assembly (11) includes a first connector seat (111), and the air outlet assembly (13) includes a second connector seat (131).

8. The air suspension dryer according to claim 7, characterized in that, The air intake assembly (11) includes a guide plate (112) and a first steel mesh (113). An air intake hole is formed on the guide plate (112), and the air intake hole communicates with the first connector seat (111). The first steel mesh (113) is located downstream of the guide plate (112), and a wind baffle is provided on the first steel mesh (113), which corresponds to the air intake hole.

9. The air suspension dryer according to claim 8, characterized in that, The air outlet assembly (13) includes a second steel mesh (132) and a spring (133). The second steel mesh (132) is disposed on the downstream side of the drying assembly (12). One end of the spring (133) is connected to the second steel mesh (132), and the other end of the spring (133) is connected to the inner arm of the tank body (14).

10. The air suspension dryer according to claim 9, characterized in that, The drying assembly (12) has a first felt plate (15) and a second felt plate (16) at both ends. The first felt plate (15) is located downstream of the first steel mesh (113), and the second felt plate (16) is located upstream of the second steel mesh (132).

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