Air suspension drying tank and air suspension system

Abstract

The invention relates to an air suspension drying tank and an air suspension system.The air suspension drying tank comprises a shell, a cavity is formed in the shell, and an upper cover plate and a lower cover plate are arranged at the two ends of the cavity; the drying agent is filled in the cavity; the heating film is positioned in the cavity; one end of the first channel penetrates through the upper cover plate and is connected with the cavity; and one end of the second channel penetrates through the lower cover plate and is connected with the cavity. Compared with the prior art, the device has the advantages that the device does not depend on an air compressor for heating, an external drying tank is not additionally arranged, energy-saving and rapid desorption is achieved, the purpose of desorption can be achieved in the shortest time, and meanwhile the effects of saving energy and reducing consumption are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of air drying, in particular to an air suspension drying tank and an air suspension system. Background Art

[0002] As a high-end suspension system on cars, the air suspension system is used in more and more models as the overall price drops. The air suspension system is divided into open suspension and closed suspension. Whether it is open or closed suspension, a drying tank needs to be installed for air drying. The main function of the drying tank is to effectively adsorb water vapor from the moist air sucked from the outside of the air compressor, and then store the dry air in the air tank for the air suspension to adjust the height, so as to avoid abnormal use or corrosion of components caused by moist air. With the development of technology and the improvement of comfort requirements, the adjustment requirements for suspension are becoming higher and more frequent, which leads to an increase in the demand for air intake. If the drying tank is to maintain an efficient adsorption effect, the adsorbed water vapor must be discharged to the outside of the drying tank in time. At present, the mainstream method is that the drying tank of the open suspension system will be equipped with an additional external drying tank, which greatly increases the adsorption amount while extending the adsorption path and length in disguise, and uses the backblowing of dry gas to achieve the desorption effect.

[0003] The air intake volume of the drying tank in the closed suspension system is much less than that of the open type. In addition, considering the installation space issue, the closed air suspension system usually only installs one drying tank. Through continuous reciprocating back-blowing, the compressed heat source of the air compressor is used to heat the air, and then the air is sucked in and desorbed by reciprocating blowing. However, the load on the air compressor is relatively large, which has a significant impact on the life, performance and desorption efficiency of the air compressor. In addition, due to the low single desorption efficiency, the air compressor needs to be opened multiple times, which will indirectly affect the energy consumption. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and to provide an air suspension drying tank and an air suspension system that do not rely on air compressor heating, do not require additional external drying tanks, and have energy-saving and fast desorption, which can achieve the desorption purpose in the shortest time and achieve the effect of energy saving and consumption reduction.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] An air suspension drying tank, comprising:

[0007] A shell, wherein a chamber is arranged inside the shell, and an upper cover plate and a lower cover plate are arranged at two ends of the chamber;

[0008] A desiccant filled in the chamber;

[0009] a heating film located in the chamber;

[0010] A first channel with one end passing through the upper cover plate and connecting to the chamber;

[0011] And a second channel with one end passing through the lower cover plate and connecting to the chamber.

[0012] Furthermore, the heating film is a PI heating film with a thickness of 0.03 - 0.5 mm, a power of 30 - 80 w, and a heating temperature of 90 - 100 °C. The heating film can achieve rapid heating with low power, can heat the heating film instantaneously, and can heat the desiccant within a few minutes to reach the desorption temperature. In addition, there is no noise during the heating process. The purpose of active heating and desorption can be achieved by controlling the heating time, with a high degree of freedom. Compared with the heating of an air compressor, the heating time of the air compressor is longer, and the noise of the kinetic energy heating of the air compressor is larger, the energy consumption is higher, and the kinetic energy heating capabilities of different air compressors on the market are different. However, using a heating film can perfectly avoid these problems.

[0013] Furthermore, both the housing and the heating film are tubular, and their central axes coincide. The heating film divides the chamber into an inner chamber and an outer chamber, and the desiccant is filled in the inner chamber and the outer chamber.

[0014] Furthermore, the desiccant is molecular sieve, and its water absorption capacity does not change with the change of gas humidity, and a good drying and water absorption effect can be achieved.

[0015] Furthermore, a first preloading spring is connected to the lower end of the upper cover plate to move up and down with the filling height of the desiccant and compact it;

[0016] A second preloading spring is connected to the upper end of the lower cover plate to move up and down with the filling height of the desiccant and compact it. Through the first preloading spring and the second preloading spring, the desiccant can always be kept in a compact state, reducing the gaps between the desiccant particles, thereby reducing particle collision and wear. And due to the limitation of the stroke of the first preloading spring and the second preloading spring, their wear on the heating film will cause a change of at most 0.5 cm and will not cause extrusion to the heating film.

[0017] Furthermore, a first filter is connected to the upper end of the upper cover plate to prevent the desiccant from leaking out;

[0018] A second filter is connected to the lower end of the lower cover plate to prevent the desiccant from leaking out. The first filter and the second filter can effectively prevent the desiccant crushed by collision from flowing out, thus affecting the air compressor or the air storage tank, and the air spring.

[0019] Further, a one-way pressure-changing orifice is provided in the second channel, which includes: an orifice body; a plurality of channels provided in the orifice body; and a one-way valve located in some of the channels. When the gas flowing in from the first channel passes through the one-way valve, the one-way valve opens; when the gas flowing in from the second channel passes through the one-way valve, the one-way valve closes. When the gas flowing in from the second channel passes through the one-way pressure-changing orifice, the gas pressure decreases, and when the gas flowing in from the first channel passes through the one-way pressure-changing orifice, the gas pressure remains unchanged. In the desorption stage of the desiccant, through the principle of pressure swing desorption, the low-pressure desorption capacity is increased and the desorption time is extended; at the same time, it does not affect the adsorption stage of the desiccant.

[0020] Furthermore, the channels with one-way valves account for 70% to 90% of all channels, preferably 75% to 85%, and more preferably 80%.

[0021] Further, a hot melt nut pre-embedded plug is provided at the second channel, which is convenient for installing a quick-connect threaded joint, adapts to different trachea sizes, is easy to plug and unplug, and the pulling force is greatly enhanced, and the installation is simple.

[0022] Further, a bracket for placing the heating film is provided in the housing.

[0023] Further, the first channel is connected to the air compressor through a flange interface, and its material is plastic. Compared with welding, the pressure resistance can be greatly enhanced. This structure can replace the high-pressure requirement of the metal external drying tank, enabling pressure swing desorption to be achieved simultaneously.

[0024] Further, in the water absorption stage of the desiccant, the first channel is connected to the air compressor, and the second channel is connected to the gas storage tank and the air spring. The humid gas flows out from the air compressor, passes through the first channel and flows into the drying tank for drying, and then the dried gas flows into the gas storage tank and the air spring through the second channel;

[0025] In the dehydration stage of the desiccant, the first channel is connected to the external atmosphere, and the second channel is connected to the gas storage tank. The gas with low humidity flows out from the gas storage tank, passes through the second channel and flows into the drying tank, takes away the water vapor removed by the desiccant, and flows out to the external atmosphere through the first channel.

[0026] An air suspension system, which includes the drying tank described above, and further includes:

[0027] An air compressor connected to the first channel of the drying tank;

[0028] A gas storage tank connected to the second channel of the drying tank;

[0029] And an air spring connected to the drying tank, the air compressor, and the gas storage tank.

[0030] Further, the air spring, also known as the pneumatic spring, is a component that utilizes compressed air to provide elastic force and supporting force. It mainly consists of an airbag, a shock absorber, etc., and can change its own stiffness and height according to the change of air pressure in the airbag. It is the core part for realizing vehicle body height adjustment and providing suspension elasticity. When more air is filled into the airbag, the air spring becomes harder and the height of the air suspension system increases; conversely, when the air in the airbag is discharged, the air spring becomes softer and the height of the air suspension system decreases.

[0031] Further, the air suspension system is an open air suspension system or a closed air suspension system.

[0032] Compared with the prior art, the present invention has the following advantages:

[0033] (1) In the present invention, the desiccant is actively heated by a heating film instead of the waste heat of an air compressor. Its heat source is more stable, the heating is faster, the heating power is smaller, and the heating film is thin and does not occupy the space of the desiccant. The heating coverage is wide and the uniformity is good, resulting in an ideal overall desorption effect. In addition, there is no noise during the heating process of the heating film.

[0034] (2) In the present invention, when the desiccant adsorbs water to reach the saturation stage, the desiccant is heated by the heating film to desorb the desiccant, so that the desiccant is regenerated, that is, its water absorption capacity is restored, thus greatly prolonging the service life and drying efficiency of the desiccant.

[0035] (3) In the present invention, a one-way pressure-changing orifice is provided between the bottom end of the desiccant and the second channel, so that the gas pressure decreases when the gas flowing in from the second channel passes through the one-way pressure-changing orifice, and the gas pressure remains unchanged when the gas flowing in from the first channel passes through the one-way pressure-changing orifice. During the desorption stage of the desiccant, through the principle of pressure-changing desorption, the low-pressure desorption capacity is increased and the desorption time is prolonged; at the same time, it does not affect the adsorption stage of the desiccant.

[0036] (4) The air suspension drying tank of the present invention can be adapted to quick-connect joints of any size by setting hot-melt nut embedded parts, increasing the anti-disconnection ability, and thus adapting to different air suspension vehicle models.

[0037] (5) In the air suspension system, moisture is an important factor affecting the stable operation of the system. The air suspension system of the present invention does not rely on the air compressor for heating and does not add an external drying tank additionally. It can achieve rapid adsorption drying and desorption regeneration, effectively remove moisture in the air, maintain a relatively dry environment inside the system, reduce the risk of component damage caused by moisture, and thus improve the stability of the system.

[0038] (6) Since the present invention does not require an external drying tank, the number of connection points and potential leakage points is reduced. It can better prevent impurities from entering the system and ensure the normal operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 Flow chart of the adsorption work of the air suspension drying tank shown in Embodiment 1;

[0040] Figure 2 Schematic structural diagram of the air suspension drying tank shown in Embodiment 2;

[0041] Figure 3 Schematic structural diagram of the one-way variable pressure orifice shown in Embodiment 2;

[0042] Figure 4 Schematic structural diagram of the air suspension drying tank shown in Embodiment 3;

[0043] Figure 5 Schematic diagram of the open air suspension system shown in Embodiment 5;

[0044] Figure 6 Schematic diagram of the closed air suspension system shown in Embodiment 6.

[0045] Description of the markings in the figures:

[0046] 1 - housing, 11 - chamber, 111 - inner chamber, 112 - outer chamber, 12 - upper cover plate, 13 - lower cover plate;

[0047] 2 - heating film, 21 - bracket;

[0048] 3 - desiccant;

[0049] 4 - first channel;

[0050] 5 - second channel, 51 - one-way variable pressure orifice, 511 - orifice body, 512 - orifice passage, 513 - one-way valve, 52 - hot melt nut;

[0051] 6 - first filter sheet;

[0052] 7 - second filter sheet;

[0053] 8 - first preloading spring;

[0054] 9 - second preloading spring;

[0055] 10 - drying tank, 101 - air compressor, 102 - air storage tank, 103 - air spring, 104 - filter, 105 - air suspension intake valve, 106 - pressure maintaining valve, 107 - pressure gauge, 108 - air storage tank intake valve, 109 - release check valve, 110 - first check valve, 111 - second check valve, 112 - pressure release valve, 113 - third check valve, 114 - fourth check valve, 115 - fifth check valve, 116 - first switching valve, 117 - second switching valve, 118 - safety valve, 119 - peripheral valve. Detailed implementation manners

[0056] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiments are implemented on the premise of the technical solution of the present invention, and detailed implementation manners and specific operation processes are given. However, the protection scope of the present invention is not limited to the following embodiments. In the following embodiments or implementation manners, if there is no special description of functional components or structures, it means that they are all conventional components or conventional structures adopted in the art to achieve corresponding functions.

[0057] It should be noted that in the description of the present invention, the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0058] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0059] An air suspension drying tank, comprising:

[0060] A housing 1, with a chamber 11 arranged inside it, and an upper cover plate 12 and a lower cover plate 13 are arranged at both ends of the chamber 11;

[0061] Desiccant 3 filled in the chamber 11;

[0062] A heating film 2 located inside the chamber 11 and used to heat the desiccant 3;

[0063] A first channel 4 with one end passing through the upper cover plate 12 and connecting to the chamber 11;

[0064] And a second channel 5 with one end passing through the lower cover plate 13 and connecting to the chamber 11.

[0065] In some specific embodiments, the heating film 2 is a PI heating film, with a thickness of 0.03 - 0.5 mm, a power of 30 - 80 w, and a heating temperature of 90 - 100 °C. The heating film 2 can achieve rapid heating with low power, can heat the heating film 2 instantaneously, and heat the desiccant 1 within a few minutes to reach the desorption temperature. In addition, there is no noise during the heating process. The purpose of active heating and desorption can be achieved by controlling the heating time, with a high degree of freedom. Compared with the heating of the air compressor 101, the heating time of the air compressor 101 is longer, and the noise of the kinetic energy heating of the air compressor 101 is greater, with higher energy consumption. Moreover, the kinetic energy heating capabilities of different air compressors 101 on the market are different, while using the heating film 2 can perfectly avoid these problems.

[0066] In some specific embodiments, both the housing 1 and the heating film 2 are tubular, and their central axes coincide. The heating film 2 divides the chamber 11 into an inner chamber 111 and an outer chamber 112, and the desiccant 3 is filled in the inner chamber 111 and the outer chamber 112. The heating film 2 can achieve double-sided heating and simultaneously heat the desiccant 3 located in the inner chamber 111 and the outer chamber 112.

[0067] In some specific embodiments, the desiccant 1 is molecular sieve, and its water absorption capacity does not change with the change of gas humidity, and a good drying and water absorption effect can be achieved.

[0068] In some specific embodiments, a first preloading spring 8 is connected to the lower end of the upper cover plate 12 to move it up and down with the filling height of the desiccant 3 and compact it;

[0069] A second preloading spring 9 is connected to the upper end of the lower cover plate 13 to move it up and down with the filling height of the desiccant 3 and compact it. Through the first preloading spring 8 and the second preloading spring 9, the desiccant 3 can always be kept in a compact state, reducing the gaps between the particles of the desiccant 3, thereby reducing particle collision and wear.

[0070] In some specific embodiments, a first filter sheet 6 for preventing the desiccant 3 from leaking out is connected to the upper end of the upper cover plate 12; a second filter sheet 7 for preventing the desiccant 3 from leaking out is connected to the lower end of the lower cover plate 12. The first filter sheet 6 and the second filter sheet 7 can effectively prevent the desiccant 3 crushed due to collision from flowing out, thus affecting the air compressor 101 or the gas storage tank 102, the air spring 103.

[0071] In some specific embodiments, a one-way pressure-changing orifice 51 is provided in the second channel 5, which includes:

[0072] An orifice main body 511;

[0073] A plurality of orifices 512 provided in the orifice main body 511;

[0074] And a one-way valve 513 located in some of the orifices 512. When the gas flowing in from the first channel 4 passes through the one-way valve 513, the one-way valve 513 opens; when the gas flowing in from the second channel 5 passes through the one-way valve 513, the one-way valve 513 closes. When the gas flowing in from the second channel 5 passes through the one-way pressure-changing orifice 51, the gas pressure decreases, and when the gas flowing in from the first channel 4 passes through the one-way pressure-changing orifice 51, the gas pressure remains unchanged. In the desorption stage of the desiccant 3, through the principle of pressure swing desorption, the low-pressure desorption capacity is increased and the desorption time is extended; at the same time, it does not affect the adsorption stage of the desiccant 3.

[0075] In some specific embodiments, the orifices 512 with one-way valves 513 account for 70% to 90% of all the orifices 512, preferably 75% to 85%, and more preferably 80%.

[0076] In some specific embodiments, a hot-melt nut embedded plug 51 is provided at the second channel 5, which facilitates the installation of a quick-connect threaded joint, adapts to different trachea sizes, is easy to plug and unplug, and the pulling force is greatly enhanced, and the installation is simple.

[0077] In some specific embodiments, a bracket 21 for placing the heating film 2 is provided in the housing 1.

[0078] In some specific embodiments, the first channel 4 is connected to the air compressor 101 through a flange interface, and its material is plastic. Compared with welding, the pressure resistance can be greatly enhanced. This structure can replace the high-pressure requirement of the metal external drying tank, so that pressure swing desorption can be achieved simultaneously.

[0079] In some specific embodiments, the first channel 4 is connected to the air compressor 101, and the second channel 5 is connected to the gas storage tank 102 and the air spring 103. In the water absorption stage of the desiccant, the moist gas flows out from the air compressor 101, passes through the first channel 4 and then flows into the drying tank 10. After drying, the dry gas flows into the gas storage tank 102 and the air spring 103; in the dehydration stage of the desiccant, the gas with low humidity flows out from the gas storage tank 102, passes through the second channel 5 and flows into the drying tank 10, and takes away the water vapor desorbed by the desiccant.

[0080] Further, during the water absorption stage of the desiccant 3, the first channel 4 is connected to the air compressor 101, and the second channel 5 is connected to the air storage tank 102 and the air spring 103. The humid gas flows out from the air compressor 101, passes through the first channel 4 and flows into the drying tank 10 for drying. After drying, the dry gas flows into the air storage tank 102 and the air spring 103 through the second channel 5;

[0081] During the dehydration stage of the desiccant 3, the first channel 4 is connected to the external atmosphere, and the second channel 5 is connected to the air storage tank 102. The gas with low humidity flows out from the air storage tank 102, passes through the second channel 5 and flows into the drying tank 10, taking away the water vapor removed by the desiccant 3, and flowing out to the external atmosphere through the first channel 4.

[0082] An air suspension system, which includes the drying tank 10 described above, and further includes:

[0083] An air compressor 101 connected to the first channel 4 of the drying tank 10;

[0084] An air storage tank 102 connected to the second channel 5 of the drying tank 10;

[0085] And an air spring 103 connected to the drying tank 10, the air compressor 101, and the air storage tank 102.

[0086] In some specific embodiments, the air suspension system is an open air suspension system or a closed air suspension system.

[0087] In some specific embodiments, in the open air suspension system, the air spring 103 is connected in series with the drying tank 10 and the air compressor 101, and in parallel with the air storage tank 102;

[0088] In the closed air suspension system, the air spring 103 is connected in series with the drying tank 10 and the air storage tank 102, and in parallel with the air compressor 101.

[0089] In some specific embodiments, the open air suspension system further includes: a filter 104 with one end connected to the external atmosphere and the other end connected to the air compressor 101 for gas filtration, and an air suspension inlet valve 105 respectively connected to the drying tank 10, the air storage tank 102, and the air spring 103;

[0090] The closed air suspension system further includes: a filter 104 with one end connected to the external atmosphere and the other end connected to the air compressor 101 for gas filtration, and an air suspension inlet valve 105 respectively connected to the drying tank 10, the air compressor 101, and the air spring 103.

[0091] In some specific embodiments, in the open air suspension system:

[0092] A first check valve 110 is provided between the drying tank 10 and the air suspension intake valve 105. A bypass channel is provided in parallel with the pipelines of the air compressor 101, the drying tank 10, and the first check valve 110. A pressure relief valve 112 and a release check valve 109 are provided on the bypass channel.

[0093] The pressure relief valve 112 is further provided with a first channel leading to the drying tank 10 and provided with a second check valve 111.

[0094] The pressure relief valve 112 is further provided with a second channel connected between the filter 104 and the air compressor 101.

[0095] The release check valve 109 is further provided with a third channel connected between the air compressor 101 and the drying tank 10.

[0096] In the closed air suspension system:

[0097] The other end of the air compressor 101 connected to the dryer 10 is provided with three passages, and check valves are respectively provided on each passage, namely a third check valve 113, a fourth check valve 114, and a fifth check valve 115. The third check valve 113 is connected to the filter 104. The fourth check valve 114 is connected to a first switching valve 116. The fifth check valve 115 is connected to a second switching valve 117. The first switching valve 116 is respectively connected to the drying tank 10, the air compressor 101, and the air suspension intake valve 105. The second switching valve 117 is respectively connected to the air storage tank 102 and the drying tank 10.

[0098] In some specific embodiments, in the open air suspension system: The outlet end of the first check valve 110 is the air suspension intake valve 105. The outlet end of the second check valve 111 is the drying tank 10 and the first check valve 110.

[0099] In the closed air suspension system:

[0100] The outlet ends of the third check valve 113, the fourth check valve 114, and the fifth check valve 115 are all the air compressor 101.

[0101] In some specific embodiments, the first check valve 110 is used to prevent the gas in the air storage tank 102 from flowing back when the outside atmosphere enters. The bypass channel is used to allow the gas from the air spring 103 or the air storage tank 102 to flow into the outside atmosphere. The first channel is used to allow the air spring 103 or the air storage tank 102 to flow through the drying tank 10, so as to take away the water vapor desorbed by heating in the drying tank 10. The release check valve 109 is used to allow the gas of the air spring 103 or the air storage tank 102 to flow out and prevent the pressure in the pipeline from being too high.

[0102] In some specific embodiments, the gas flowing from the pressure relief valve 112 into the release check valve 109 has a gas flow rate sufficient to push open the release check valve 109, and the rest flows out through the drying tank 10. The gas flow rate is controlled by the opening and closing time of the pressure relief valve 112.

[0103] In some specific embodiments, in the open-type air suspension system:

[0104] A pressure holding valve 106 is provided between the air spring 103 and the air suspension intake valve 105.

[0105] A pressure gauge 107 and a storage tank intake valve 108 are provided between the storage tank 102 and the air suspension intake valve 105.

[0106] In the closed-type air suspension system:

[0107] A pressure holding valve 106 and a safety valve 118 are provided between the drying tank 10 and the second switching valve 117.

[0108] A pressure gauge 107 and a peripheral valve 119 are provided between the air suspension intake valve 105 and the first switching valve 116.

[0109] Each of the above embodiments can be implemented independently, or can be combined in any pair or more.

[0110] The following will be described in conjunction with specific embodiments.

[0111] Embodiment 1

[0112] An air suspension drying tank, comprising:

[0113] A housing 1, with a chamber 11 arranged inside it, and an upper cover plate 12 and a lower cover plate 13 arranged at both ends of the chamber 11;

[0114] A desiccant 3 filled in the chamber 11;

[0115] A heating film 2 located inside the chamber 11 and used to heat the desiccant 3;

[0116] A first channel 4 with one end passing through the upper cover plate 12 and connecting to the chamber 11;

[0117] And a second channel 5 with one end passing through the lower cover plate 13 and connecting to the chamber 11.

[0118] In this embodiment, the heating film 2 is a PI heating film with a thickness of 0.2 mm, a power of 40 w, and a heating temperature of 100 °C. The heating film 2 can achieve rapid heating at low power, can instantaneously heat the heating film 2, and heat the desiccant 1 within 2 minutes at 12V to reach the desorption temperature. In addition, there is no noise throughout the heating process. The purpose of active heating and desorption can be achieved by controlling the heating time, with a high degree of freedom of coordination. The thickness and power of the heating film 2 can also be set according to requirements. Compared with the heating of the air compressor 101, the heating time of the air compressor 101 is longer, and the noise generated by the kinetic energy heating of the air compressor 101 is greater, with higher energy consumption. Moreover, the kinetic energy heating capabilities of different air compressors 101 on the market are different, while using the heating film 2 can perfectly avoid these problems.

[0119] In this embodiment, both the housing 1 and the heating film 2 are tubular, and their central axes coincide. The heating film 2 divides the chamber 11 into an inner chamber 111 and an outer chamber 112, and the desiccant 3 is filled in the inner chamber 111 and the outer chamber 112. The heating film 2 can achieve double-sided heating and simultaneously heat the desiccant 3 located in the inner chamber 111 and the outer chamber 112.

[0120] In this embodiment, the desiccant 1 is molecular sieve. In this embodiment, the national standard 13X sieve is adopted, and its water absorption capacity does not change with the change of gas humidity, and a good drying and water absorption effect can be achieved.

[0121] In this embodiment, a first preloading spring 8 is connected to the lower end of the upper cover plate 12 to move it up and down with the filling height of the desiccant 3 and compact it; a second preloading spring 9 is connected to the upper end of the lower cover plate 13 to move it up and down with the filling height of the desiccant 3 and compact it. Through the first preloading spring 8 and the second preloading spring 9, the desiccant 3 can always be kept in a compact state, reducing the gaps between the particles of the desiccant 3, thereby reducing particle collision and wear.

[0122] In this embodiment, a first filter sheet 6 for preventing the desiccant 3 from leaking out is connected to the upper end of the upper cover plate 12; a second filter sheet 7 for preventing the desiccant 3 from leaking out is connected to the lower end of the lower cover plate 12. The first filter sheet 6 and the second filter sheet 7 are purchased from Guangzhou Sanli Non-woven Fabric Co., Ltd., with the model 3LAKM400LL. The first filter sheet 6 and the second filter sheet 7 can effectively prevent the desiccant 3 crushed due to collision from flowing out, thus affecting the air compressor 101 or the gas storage tank 102 and the air spring 103.

[0123] In this embodiment, a bracket 21 for placing the heating film 2 is provided in the housing 1.

[0124] In this embodiment, during the water absorption stage of the desiccant 3, the first channel 4 is connected to the air compressor 101, and the second channel 5 is connected to the air storage tank 102 and the air spring 103. The moist gas flows out from the air compressor 101, passes through the first channel 4 and flows into the drying tank 10. After drying, the dried gas flows into the air storage tank 102 and the air spring 103 through the second channel 5;

[0125] During the dehydration stage of the desiccant 3, the first channel 4 is connected to the external atmosphere, and the second channel 5 is connected to the air storage tank 102. The gas with low humidity flows out from the air storage tank 102, passes through the second channel 5 and flows into the drying tank 10, taking away the water vapor removed by the desiccant 3, and flowing out to the external atmosphere through the first channel 4.

[0126] In this embodiment, the working principle of the air suspension drying tank is as follows:

[0127] As Figure 1 shown, when the air suspension drying tank performs the adsorption work, the gas with a certain humidity in the air compressor 101 enters through the first channel 4, passes through the first filter 6 and then enters the chamber 11, including the inner chamber 111 and the outer chamber 112. The water in the gas is adsorbed by the desiccant 3 filled therein, and the dried gas passes through the second filter 7 and then exits through the second passage 5, reaches the air storage tank 102, and then reaches the air spring 103. At this time, the heating film 2 is not heated.

[0128] When the air compressor 101 has been used for a certain cumulative time, the air suspension drying tank can perform the desorption work. First, according to the cumulative running time of the air compressor 101, it is estimated that the adsorption amount of the desiccant 3 in the air suspension drying tank has reached the requirement for desorption. After the heating film 2 is energized at 12V for 2 minutes, the desiccant 3 gets hot and starts to desorb the surface water vapor. At this time, the pre-pressurized gas in the air storage tank 102 is released, flows in through the second channel 5, passes through the second filter 7 and then flows into the chamber 11, including the inner chamber 111 and the outer chamber 112, so that the desorbed water vapor in the desiccant 3 is carried away by the pre-pressurized gas and flows out to the external atmosphere through the first channel 4, thereby achieving the effect of regenerating the desiccant 3.

[0129] Embodiment 2

[0130] As Figure 2 and 3As shown in the figure, on the basis of Embodiment 1, a one-way pressure-changing orifice 51 is provided in the second channel 5, which includes: an orifice main body 511; a plurality of orifices 512 provided in the orifice main body 511; and a one-way valve 513 located in some of the orifices 512. The orifices 512 with one-way valves 513 account for 80% of all the orifices 512. When the gas flowing in from the first channel passes through the one-way valve, the one-way valve opens; when the gas flowing in from the second channel passes through the one-way valve, the one-way valve closes. The gas pressure is reduced when the gas flowing in from the second channel 5 passes through the one-way pressure-changing orifice 51, and the gas pressure remains unchanged when the gas flowing in from the first channel 4 passes through the one-way pressure-changing orifice 51. In the desorption stage of the desiccant 3, through the principle of pressure swing desorption, the low-pressure desorption capacity is increased and the desorption time is extended; at the same time, it does not affect the adsorption stage of the desiccant 3.

[0131] When the air suspension drying tank performs adsorption work, the gas with a certain humidity in the air compressor 101 enters the housing 1 from the first channel 4, passes through the first filter 6 and then enters the chamber 11, including the inner chamber 111 and the outer chamber 112. The water in the gas is adsorbed by the desiccant 3 filled therein to obtain dry gas. The dry gas passes through the one-way pressure-changing orifice 51 and the second filter 7 and then exits from the second channel 5, reaches the air storage tank 102, and then reaches the air spring 103. At this time, the heating film 2 is not heated, and the air pressure does not change when the gas passes through the one-way pressure-changing orifice 51 because the pre-pressurized gas flows through the orifices 512 in the orifice main body 511 and the one-way valve 513 opens.

[0132] When the air compressor 101 has been used for a certain cumulative time, the air suspension drying tank can perform desorption work. First, according to the cumulative operation time of the air compressor 101, it is estimated that the adsorption amount of the desiccant 3 in the air suspension drying tank has reached the requirement for desorption. After the heating film 2 is powered on at 12V for 2 minutes, the desiccant 3 has heated up and starts to desorb the surface water vapor. At this time, the pre-pressurized gas in the air storage tank 102 is released, flows in from the second channel 14, passes through the second filter 7 and the one-way pressure-changing orifice 51 and then flows into the inner chamber 111 and the outer chamber 112, so that the desorbed water vapor in the desiccant 3 is carried away by the pre-pressurized gas and flows out to the external atmosphere from the first channel 4, thereby achieving the effect of regenerating the desiccant 3. Among them, when the pre-pressurized gas passes through the one-way pressure-changing orifice 51, the pre-pressurized gas flows through the orifices 512 in the orifice main body 511. Since the one-way valves 513 in some of the orifices 512 are closed, the pre-pressurized gas can only pass through some of the orifices 513 without one-way valves 513, and the high-pressure gas becomes low-pressure gas, accumulating the desorption effect after heating, making the water vapor easier to desorb and increasing the desorption time. When the air pressure becomes 0, the air compressor is restarted to store gas in the air storage tank, and then 1-2 heating and repeated exhaust operations are performed, and most of the adsorbed water vapor can be basically desorbed to complete the entire desorption operation.

[0133] Example 3

[0134] As Figure 4 shown, on the basis of Example 1, a hot melt nut embedded plug 51 is provided at the second channel 5 in this example, which facilitates the installation of a quick-connect threaded joint, adapts to different trachea sizes, is convenient for plugging and unplugging, and greatly enhances the pulling force, and the installation is simple.

[0135] Example 4

[0136] On the basis of Example 1, in this example, the first channel 4 is connected to an air compressor 101 through a flange interface, and its material is plastic. Compared with welding, the pressure resistance can be greatly enhanced. This structure can replace the high-pressure requirement of the metal external drying tank 10, enabling pressure swing desorption to be achieved simultaneously.

[0137] Example 5

[0138] An air suspension system, the drying tank 10 described in Example 1 of the air suspension system, as Figure 5 shown, further includes:

[0139] An air compressor 101 connected to the first channel 4 of the drying tank 10;

[0140] A gas storage tank 102 connected to the second channel 5 of the drying tank;

[0141] And an air spring 103 connected to the drying tank 10, the air compressor 101, and the gas storage tank 102.

[0142] In this example, the air suspension system is an open-type air suspension system. In the open-type air suspension system, the air spring 103 is in series with the drying tank 10 and the air compressor 101, and in parallel with the gas storage tank 102.

[0143] In this example, the open-type air suspension system further includes: a filter 104 with one end connected to the outside atmosphere and the other end connected to the air compressor 101 and used for gas filtration, and an air suspension intake valve 105 respectively connected to the drying tank 10, the gas storage tank 102, and the air spring 103. The filter 104 adopts common components in the art and is mainly used for filtering the air entering the system. It can prevent solid particles such as dust, pollen, and sand grains, as well as impurities such as moisture and oil stains, from entering key components such as the air spring 103.

[0144] In this example, a first check valve 110 is provided between the drying tank 10 and the air suspension intake valve 105. A bypass channel is in parallel with the pipelines of the air compressor 101, the drying tank 10, and the first check valve 110. A pressure relief valve 112 and a release check valve 109 are provided on the bypass channel.

[0145] The pressure relief valve 112 is further provided with a first passage leading to the drying tank 10 and provided with a second check valve 111.

[0146] The pressure relief valve 112 is further provided with a second passage connecting the filter 104 and the air compressor 101.

[0147] The release check valve 109 is further provided with a third passage connecting the air compressor 101 and the drying tank 10.

[0148] In this embodiment, the outlet end of the first check valve 110 is the air suspension inlet valve 105, and the outlet end of the second check valve 111 is the drying tank 10 and the first check valve 110.

[0149] In this embodiment, the first check valve 110 is used to prevent the gas in the air storage tank 102 from flowing back when the outside air enters. The bypass passage is used to allow the gas from the air spring 103 or the air storage tank 102 to flow into the outside air. The first passage is used to allow the air spring 103 or the air storage tank 102 to flow through the drying tank 10, so as to carry away the water vapor desorbed by heating in the drying tank 10. The release check valve 109 is used to allow the gas in the air spring 103 or the air storage tank 102 to flow out, to prevent the pressure in the pipeline from being too high.

[0150] In this embodiment, the gas flowing from the pressure relief valve 112 into the release check valve 109 has a gas flow rate sufficient to push open the release check valve 109, and the rest flows out through the drying tank 10.

[0151] In this embodiment, a pressure holding valve 106 is provided between the air spring 103 and the air suspension inlet valve 105.

[0152] A pressure gauge 107 and an air storage tank inlet valve 108 are provided between the air storage tank 102 and the air suspension inlet valve 105.

[0153] In this embodiment, the working principle and process of the open type air suspension system are as follows:

[0154] 1. When the open type air suspension system rises, the air spring 103 becomes hard, and the air storage tank 102 has no stored air: the air compressor 101 is turned on, the air suspension inlet valve 105 is opened, the pressure holding valve 106 is opened, the air storage tank inlet valve 108 is closed, the pressure relief valve 112 is closed, the release check valve 109 is closed, and the desiccant 3 in the drying tank 10 absorbs water.

[0155] Outside air enters the open air suspension system. First, it is roughly filtered by the filter 104, passes through the air compressor 101, then through the drying tank 10 for water absorption and drying, and reaches the air spring 103 after passing through the first check valve 110, the air suspension inlet valve 105, and the pressure maintaining valve 106, thereby making the air spring 103 harder and the air suspension system rise. At this time, there is no air stored in the air storage tank 102.

[0156] 2. After the air suspension system rises to completion, the air storage tank 102 starts to store air; the air storage tank inlet valve 108 opens.

[0157] After the open air suspension system rises to completion, the air storage tank inlet valve 108 is opened. Outside air first passes through the filter 104 for rough filtration, passes through the air compressor 101, then through the drying tank 10 for water absorption and drying, and reaches the air storage tank 102 after passing through the first check valve 110, the air suspension inlet valve 105, and the air storage tank inlet valve 108. The pressure gauge 107 monitors the pressure in the air storage tank 102. At this time, the air spring 103 is completely hardened, the open air suspension system has risen to completion, and the air storage tank 102 starts to store air.

[0158] 3. The air storage tank 102 has completed gas storage: the air storage tank inlet valve 108 is closed, the air suspension inlet valve 105 is closed, and the air compressor 101 is closed.

[0159] When the pressure gauge 107 detects that the pressure in the air storage tank 102 reaches a certain value, it indicates that the air storage tank 102 has completed gas storage. At this time, the air storage tank inlet valve 108, the air suspension inlet valve 105, and the air compressor 101 are closed.

[0160] 4. The open air suspension system descends and the drying tank 10 is regenerated: the air suspension inlet valve 105 is opened, the pressure release valve 112 is opened, the release check valve 109 is opened, and the heating film 2 in the drying tank 10 is opened.

[0161] The air in the air spring 103 passes through the pressure maintaining valve 106, the air suspension inlet valve 105, and the pressure release valve 112 to reach and push open the release check valve 109, and then is discharged to the outside through the filter 104. In addition, the air in the air spring 103 passes through the pressure maintaining valve 106, the air suspension inlet valve 105, and the pressure release valve 112 and also passes through the second check valve 113 to enter the drying tank 10. The air takes away the desorbed water vapor in the drying tank 10 and is then discharged to the outside through the release check valve 109 and the filter 104 in sequence. At this time, the air spring 103 becomes softer, the open air suspension system descends, the desiccant 3 in the drying tank 10 is regenerated, and the air storage tank 102 is full of gas.

[0162] 5. Elevation of the open air suspension system: The pressure relief valve 112 is closed, the release check valve 109 is closed, the air storage tank intake valve 108 is opened, and the heating film 2 in the drying tank 10 is closed.

[0163] After the desiccant 3 in the drying tank 10 is regenerated, the pressure relief valve 112 and the release check valve 109 are closed, the air storage tank intake valve 108 is opened, the compressed air in the air storage tank 102 enters the air spring 103, the air spring 103 becomes hard, and the open air suspension system rises.

[0164] 6. Air circuit breakage: The pressure holding valve 106 is closed.

[0165] If the suspension intake air circuit between the air spring 103 and the air suspension intake valve 105 is damaged and leaks air, the pressure holding valve 106 is closed to prevent the air spring 103 from leaking air.

[0166] Embodiment 6

[0167] An air suspension system, which includes the drying tank 10 described in Embodiment 1, as Figure 6 shown, further includes:

[0168] An air compressor 101 connected to the first channel 4 of the drying tank 10;

[0169] An air storage tank 102 connected to the second channel 5 of the drying tank;

[0170] And an air spring 103 connected to the drying tank 10, the air compressor 101, and the air storage tank 102.

[0171] In this embodiment, the air suspension system is a closed air suspension system. In the closed air suspension system, the air spring 103 is in series with the drying tank 10 and the air storage tank 102, and in parallel with the air compressor 101.

[0172] In this embodiment, the closed air suspension system further includes: a filter 104 with one end connected to the outside atmosphere and the other end connected to the air compressor 101 for gas filtration, and an air suspension intake valve 105 respectively connected to the drying tank 10, the air compressor 101, and the air spring 103.

[0173] In this embodiment, the other end of the air compressor 101 connected to the dryer 10 is provided with three passages, and check valves are respectively arranged on each passage, namely the third check valve 113, the fourth check valve 114, and the fifth check valve 115. The third check valve 113 is connected to the filter 104, the fourth check valve 114 is connected to a first switching valve 116, and the fifth check valve 115 is connected to a second switching valve 117. The first switching valve 116 is respectively connected to the drying tank 10, the air compressor 101, and the air suspension intake valve 105. The second switching valve 117 is respectively connected to the gas storage tank 102 and the drying tank 10.

[0174] In this embodiment, the outlet ends of the third check valve 113, the fourth check valve 114, and the fifth check valve 115 are all the air compressor 101.

[0175] In this embodiment, a pressure holding valve 106 and a safety valve 118 are arranged between the drying tank 10 and the second switching valve 117.

[0176] A pressure gauge 107 and a peripheral valve 119 are arranged between the air suspension intake valve 105 and the first switching valve 116. The peripheral valve 119 is used for emergency pressure relief and is usually not opened.

[0177] In this embodiment, the working principle and process of the closed air suspension system are as follows:

[0178] 1. The closed air suspension system rises: The second switching valve 117 is closed, the air compressor 101 is opened, the first switching valve 116 is opened, the air suspension intake valve 105 is opened, and the peripheral valve 119 is closed.

[0179] The gas in the gas storage tank 102 enters the air spring 103 through the second switching valve 117, the fifth check valve 115, the air compressor 101, the first switching valve 116, and the air suspension intake valve 105, making the air spring 103 harder, and the closed air suspension system rises. Since the air pressure in the air compressor 101 is greater than the external air pressure at this time, the external atmosphere cannot reach the air compressor 101 from the filter 104. Since the safety valve 118 needs a very large pressure to be opened, the safety valve 118 is closed.

[0180] 2. The closed air suspension system descends: The first switching valve 116 is closed, the second switching valve 117 is opened, and the drying tank 10 dries.

[0181] After the closed air suspension system is fully raised, close the first switching valve 116 and open the second switching valve 117. The atmosphere in the air spring 103 passes through the air suspension intake valve 105, the first switching valve 116, the fourth check valve 114, and the air compressor 101, and then is dried by the desiccant 3 in the drying tank 10. Then it reaches the air storage tank 102 through the second switching valve 117. At this time, the air spring 103 becomes soft and the closed air suspension system descends.

[0182] 3. Regeneration of the drying tank 10 and pressure monitoring of the air storage tank 102: Open the first switching valve 116, turn off the air compressor 101, and turn on the heating film 2 in the drying tank 10.

[0183] When the air compressor 101 has been used for a certain cumulative time, the drying tank 10 can perform the desorption operation. The gas in the air storage tank 102 passes through the second switching valve 117 and the pressure holding valve 106 to reach the drying tank 10, taking away the water vapor desorbed by the heating film 2 in the drying tank 10. Then it reaches the air spring 103 through the first switching valve 116 and the air suspension intake valve 105. At this time, the air spring 103 becomes hard and the closed air suspension system rises. The pressure gauge 102 monitors the pressure in the air storage tank 102.

[0184] 4. Inflation of the air storage tank 102: Open the first switching valve 116, open the air suspension intake valve 105, turn off the air compressor 101, and turn off the heating film 2 in the drying tank 10.

[0185] When the pressure gauge 102 detects that the pressure in the air storage tank 102 is low, store gas in the air storage tank 102. The outside atmosphere enters the filter 104 for coarse filtration, passes through the third check valve 113 and the air compressor 101, then reaches the drying tank 10 for drying, and then passes through the pressure holding valve 106 and the second switching valve 117 to reach the air storage tank 102. The air storage tank 102 is filled with dry gas until it is full.

[0186] Embodiment 7

[0187] An air suspension system, the drying tank 10 described in Embodiment 2 of this air suspension system, and the rest is the same as in Embodiment 5.

[0188] Embodiment 8

[0189] An air suspension system, the drying tank 10 described in Embodiment 2 of this air suspension system, and the rest is the same as in Embodiment 6.

[0190] Although the present invention has been described in detail above with general descriptions, specific embodiments and experiments, on the basis of the present invention, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection required by the present invention.

Claims

1. An air suspension drying tank, characterized in that: The drying tank (10) comprises: A housing (1) having a chamber (11) disposed therein, wherein an upper cover plate (12) and a lower cover plate (13) are disposed at both ends of the chamber (11); A desiccant (3) filled in the chamber (11); A heating film (2) located inside the chamber (11) and used to heat the desiccant (3); A first channel (4) having one end passing through the upper cover plate (12) and connected to the chamber (11); and a second channel (5) having one end passing through the lower cover plate (13) and connected to the chamber (11).

2. The air suspension drying tank according to claim 1, characterized in that: The heating film (2) is a PI heating film with a thickness of 0.03-0.5 mm, a power of 30-80 W, and a heating temperature of 90-100° C.

3. The air suspension drying tank according to claim 1, characterized in that: The shell (1) and the heating film (2) are both tubular, and their central axes coincide with each other; the heating film (2) divides the chamber (11) into an inner chamber (111) and an outer chamber (112); and the desiccant (3) is filled in the inner chamber (111) and the outer chamber (112).

4. The air suspension drying tank according to claim 1, characterized in that: The desiccant (1) is a molecular sieve.

5. The air suspension drying tank according to claim 1, characterized in that: The lower end of the upper cover plate (12) is connected to a first pre-compression spring (8) which enables it to move up and down along with the filling height of the desiccant (3) and to compact it; The upper end of the lower cover plate (13) is connected to a second pre-compression spring (9) which enables it to move up and down according to the filling height of the desiccant (3) and to compact it.

6. The air suspension drying tank according to claim 1, characterized in that: The upper end of the upper cover plate (12) is connected to a first filter sheet (6) for preventing the desiccant (3) from leaking out; The lower end of the lower cover plate (12) is connected to a second filter sheet (7) for preventing the desiccant (3) from seeping out.

7. The air suspension drying tank according to claim 1, characterized in that: The second channel (5) is provided with a one-way voltage-changing orifice (51), which comprises: An orifice body (511); A plurality of channels (512) disposed in the orifice body (511); And a one-way valve (513) is located in a part of the pores (512), and the pores (512) with the one-way valve (513) account for 70% to 90% of all the pores (512).

8. The air suspension drying tank according to claim 1, characterized in that: A hot-melt nut pre-embedded plug-in (51) is provided at the second channel (5); A bracket (21) for placing the heating film (2) is arranged inside the housing (1).

9. An air suspension system, characterized in that: The air suspension system comprises a drying tank (10) as claimed in any one of claims 1 to 8, and further comprises: An air compressor (101) connected to the first passage (4) of the drying tank (10); An air storage tank (102) connected to the second passage (5) of the drying tank; and an air spring (103) connected to the drying tank (10), the air compressor (101) and the air storage tank (102).

10. An air suspension system according to claim 9, characterized in that: The air suspension system is an open air suspension system or a closed air suspension system.

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