Automobile air suspension inflating device

Abstract

The utility model provides an air inflation device for an automobile air suspension, and belongs to the technical field of automobile air suspensions. The automobile air suspension inflating device comprises an air bag, an air pump and two filter cartridges, outlets of the two filter cartridges are communicated with a four-way two-position reversing valve, and an air inlet of the air pump and an exhaust port of the air bag are both communicated with the reversing valve. The device has the advantages that one of the filter cartridges is communicated with the air pump through the reversing valve, dust-proof filtering is normally carried out, the influence on the air bag and the air pump is avoided, meanwhile, the other filter cartridge is communicated with the air bag exhaust port, gas exhausted by the air bag is used for achieving back flushing on the filter cartridges, and therefore the filter cartridges are helped to remove dust, the regeneration effect is achieved, and the service life of the filter cartridges is prolonged. And the two filter cartridges alternately perform filtering and backflushing processes, so that the service life of the filter cartridges is effectively prolonged.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of automobile air suspension, in particular to an air charging device for automobile air suspension. BACKGROUND

[0002] The air charging device for automobile air spring is a key part for ensuring stable operation of a vehicle suspension system. The air charging device mainly comprises an air pump, an air tank, a control valve and connecting pipelines. The air pump, as a core component, is responsible for extracting air from the outside and compressing and delivering the air to the air tank for storage. The air tank provides a stable air source for subsequent air charging of the air spring, and the control valve precisely controls the on-off and flow rate of the air flow.

[0003] During operation of the air pump, the air pump sucks air through a filter element. The filter element, like a bodyguard, blocks dust and impurities to prevent them from entering the air system and affecting performance. However, the filter element is not a one-time solution. As the use time increases and the amount of air suction accumulates, the filter element will gradually be clogged by impurities, greatly reducing the air suction efficiency and thus affecting the overall performance of the air charging device. Therefore, the filter element has a service life limit and needs to be replaced regularly, which adds to the maintenance trouble of the vehicle owner. CONTENT OF THE INVENTION

[0004] In order to make up for the above shortcomings, the application provides an air charging device for automobile air suspension, which aims to improve the problems mentioned in the above background technology.

[0005] The application provides an air charging device for automobile air suspension, which comprises an air bag, an air pump and filter cartridges. Two filter cartridges are provided, the outlets of the two filter cartridges are communicated with a four-way two-position reversing valve, the air inlet of the air pump and the air outlet of the air bag are both communicated with the reversing valve.

[0006] In a specific embodiment, an air tank is further included, which is connected in series between the air outlet of the air pump and the air inlet of the air bag.

[0007] In the above implementation process, the air pump extracts air from the outside through the filter cartridge, compresses and delivers the air to the air tank for storage, and supplies air to the air bag through the air tank, thereby avoiding frequent start and stop of the air pump and improving the service life of the air pump.

[0008] In a specific embodiment, a valve A is connected in series between the air bag and the air tank.

[0009] In the above implementation process, the valve A is an electromagnetic valve, which is used to control the compressed gas in the air tank to enter the air bag, so as to realize lifting of the air suspension.

[0010] In a specific embodiment, an energy storage tank is connected in series between the air outlet of the air bag and the reversing valve, and a valve B is connected in series between the outlet of the energy storage tank and the reversing valve.

[0011] In the above implementation process, when the car is lowered slightly, the airbag exhaust volume is not large, and the pressure and flow are insufficient to blow away the dust on the surface of the filter cartridge. Therefore, in this embodiment, when the airbag is exhausted, the gas first enters the accumulator tank. When the pressure in the accumulator tank rises to a certain level, valve B is opened to inflate the filter cartridge, which can increase the gas pressure and thus improve the backflush effect.

[0012] In one specific implementation, a valve C is connected in series between the inlet of the energy storage tank and the exhaust port of the airbag.

[0013] In the above implementation process, valve C is used to control the deflation of the airbag. After deflation, valve C closes to ensure that the gas inside the airbag does not leak. Since the pressure of the accumulator tank affects the deflation speed of the airbag, valve C is an electromagnetic flow valve, which can control the airflow into the accumulator tank. The accumulator tank is equipped with a pressure sensor, which is opened to an appropriate size by comparing with the pressure inside the airbag, so as to control the deflation speed of the airbag, that is, control the descent speed of the air suspension.

[0014] In one specific implementation, the air pipe between the inlet of the energy storage tank and the exhaust port of the airbag has a high flow rate.

[0015] In the above process, when the pressure of the energy storage tank increases to near the pressure of the airbag, the gas transmission speed will decrease. Therefore, this section of the air pipe adopts a large flow rate so that when the pressure difference is small, a suitable exhaust speed can still be maintained. When the pressure difference is large, the flow rate is controlled by valve C to ensure that the exhaust speed will not get out of control due to the large pressure difference.

[0016] In one specific implementation, the filter cartridge has a composite structure, with an outer layer of dustproof filter screen and an inner layer of dry granules.

[0017] In the above process, the filter screen isolates the dust, while the drying particles are used to adsorb moisture in the air. Here, the drying particles are silica gel desiccant particles. Silica gel desiccant is a highly active adsorbent material, usually made by reacting sodium silicate with sulfuric acid and then undergoing a series of post-processing processes such as aging and acid soaking. The interior of silica gel has an extremely fine pore network structure. These pores can adsorb moisture. When the high-pressure gas in the storage tank is released rapidly, the high-speed airflow blows away the moisture in the pores, thereby reducing the water saturation of the drying particles and regenerating the moisture absorption capacity.

[0018] In one specific implementation, a heating wire is provided inside the filter cartridge.

[0019] In the above implementation process, when the filter cartridge is to be backflushed, the heating wire is turned on to heat up, increasing the temperature of the air inside the filter cartridge to 100 degrees Celsius or higher, so the filter screen should be made of high-temperature-resistant material, such as glass fiber, and then valve B is opened, the high-pressure gas in the energy storage tank pushes the hot gas in the filter cartridge to the drying particles and the filter screen, helping to evaporate the moisture in the pores, and regenerating the moisture absorption capacity of the drying particles. In another embodiment, the heating wire is replaced by a heat pipe, which is in communication with the exhaust pipe of the engine. When the heating wire is needed, the electromagnetic valve on the heat pipe is opened to introduce the heat in the exhaust pipe into the filter cartridge, realizing heat reutilization. The heat pipe also needs a two-position four-way directional valve to control the heat into the designated filter cartridge.

[0020] Compared with the prior art, the beneficial effects of the present application are that the directional valve communicates one of the filter cartridges with the air pump for normal dust prevention and filtration, avoiding affecting the air bag and the air pump, while the other filter cartridge is communicated with the air bag exhaust port, and the filter cartridge is backflushed by the gas discharged from the air bag, thereby helping to remove dust from the filter cartridge to achieve regeneration effect. The two filter cartridges alternately perform the filtration and backflushing processes, thereby effectively improving the service life of the filter cartridge. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0022] Figure 1 is a schematic diagram of the air charging device of the automobile air suspension provided by the embodiments of the present application;

[0023] Figure 2 is a schematic diagram of the connection relationship between the energy storage tank, the air bag and the filter cartridge provided by the embodiments of the present application;

[0024] Figure 3 is a schematic diagram of the filter cartridge structure provided by the embodiments of the present application.

[0025] In the figure: 10-air bag; 11-valve C; 20-air pump; 30-filter cartridge; 31-dustproof filter screen; 32-drying particles; 33-heating wire; 40-directional valve; 50-gas storage tank; 51-valve A; 60-energy storage tank; 61-valve B. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be described below in combination with the drawings in the embodiments of the present application.

[0027] Please refer to Figures 1-3This application provides an air suspension inflation device for automobiles, including an airbag 10, an air pump 20, and filter cartridges 30. Two filter cartridges 30 are provided, and the outlets of the two filter cartridges 30 are connected to a four-way two-position reversing valve 40. The air inlet of the air pump 20 and the exhaust port of the airbag 10 are both connected to the reversing valve 40. The reversing valve 40 connects one filter cartridge 30 to the air pump 20 for normal dust filtration, avoiding any impact on the airbag 10 and air pump 20. Simultaneously, it connects the other filter cartridge 30 to the exhaust port of the airbag 10, using the gas discharged from the airbag 10 to backflush the filter cartridge 30, thereby helping to remove dust from the filter cartridge 30 and achieving a regeneration effect. The two filter cartridges 30 alternately perform the filtration and backflushing processes, effectively improving the service life of the filter cartridges 30.

[0028] Please see Figures 1-3 It also includes an air tank 50, which is connected in series between the air outlet of the air pump 20 and the air inlet of the airbag 10. The air pump 20 draws air from the outside through the filter cartridge 30, compresses it and delivers it to the air tank 50 for storage. The air tank 50 supplies air to the airbag 10, avoiding frequent start-stop of the air pump 20 and thus improving the lifespan of the air pump 20.

[0029] Please see Figures 1-3 A valve A51 is connected in series between the airbag 10 and the air tank 50. Valve A51 is a solenoid valve, used to control the compressed gas in the air tank 50 to enter the airbag 10, thereby raising the air suspension.

[0030] Please see Figures 1-3 An energy storage tank 60 is connected in series between the exhaust port of the airbag 10 and the reversing valve 40, and a valve B61 is connected in series between the outlet of the energy storage tank 60 and the reversing valve 40. When the car is lowered slightly, the exhaust volume of the airbag 10 is small, and the pressure and flow rate are insufficient to blow away the dust on the surface of the filter cartridge 30. Therefore, in this embodiment, when the airbag 10 exhausts, the gas first enters the energy storage tank 60. When the pressure inside the energy storage tank 60 rises to a certain level, the valve B61 is opened to inflate the filter cartridge 30, which can increase the gas pressure and thus improve the backflushing effect.

[0031] Please see Figures 1-3 A valve C11 is connected in series between the inlet of the accumulator tank 60 and the exhaust port of the airbag 10. Valve C11 is used to control the deflation of the airbag 10. After deflation, valve C11 closes to ensure that the gas inside the airbag 10 does not leak. Since the pressure of the accumulator tank 60 affects the deflation speed of the airbag 10, valve C11 is an electromagnetic flow valve, which can control the airflow into the accumulator tank 60. A pressure sensor is installed on the accumulator tank 60. By comparing the pressure with the pressure inside the airbag 10, the sensor opens to an appropriate degree to control the deflation speed of the airbag 10, that is, to control the descent speed of the air suspension.

[0032] Please see Figures 1-3The air pipe between the inlet of the accumulator 60 and the exhaust port of the airbag 10 has a high flow rate. When the pressure of the accumulator 60 increases to near the pressure of the airbag 10, the gas transmission speed will decrease. Therefore, this section of the air pipe has a high flow rate so that a suitable exhaust speed can still be maintained when the pressure difference is small. When the pressure difference is large, the flow rate is controlled by valve C11 to ensure that the exhaust speed does not get out of control due to the large pressure difference.

[0033] Please see Figures 1-3 The filter cartridge 30 has a composite structure, with an outer dust filter 31 and an inner drying granule 32. The filter isolates dust, while the drying granule 32 adsorbs moisture from the air. Here, the drying granule 32 is made of silica gel desiccant particles. Silica gel desiccant is a highly active adsorbent material, usually produced by reacting sodium silicate with sulfuric acid and undergoing a series of post-treatment processes such as aging and acid soaking. The interior of silica gel has an extremely fine pore network structure. These pores can adsorb moisture. When the high-pressure gas in the storage tank 60 is released rapidly, the high-speed airflow blows away the moisture in the pores, thereby reducing the water saturation of the drying granule 32 and regenerating its moisture absorption capacity.

[0034] Please see Figures 1-3 The filter cartridge 30 is equipped with a heating wire 33. When the filter cartridge 30 is about to be backflushed, the heating wire 33 is turned on to heat up the air inside the filter cartridge 30 to 100 degrees Celsius or higher. Therefore, the filter screen should be made of a high-temperature resistant material, such as glass fiber. Then, valve B61 is opened, and the high-pressure gas in the energy storage tank 60 pushes the hot gas in the filter cartridge 30 toward the dry particles 32 and the filter screen, helping the moisture in the pores to evaporate and regenerating the moisture absorption capacity of the dry particles 32. In another embodiment, the heating wire 33 is replaced with a heat pipe, which is connected to the exhaust pipe of the engine. When heating is needed, the solenoid valve on the heat pipe is opened to introduce the heat from the exhaust pipe into the filter cartridge 30, realizing the reuse of thermal energy. The heat pipe also needs a two-position four-way reversing valve 40 to control the heat entering the designated filter cartridge 30.

[0035] The working principle of this car air suspension inflation device is as follows: At the same time, the air pump 20 is connected to one of the filter cartridges 30 through the reversing valve 40, while the other filter cartridge 30 is connected to the accumulator tank 60. The air pump 20 draws in external air through the reversing valve 40 and enters the air tank 50. When it is necessary to raise the suspension height, valve A51 opens to control the compressed gas in the air tank 50 to enter the air bladder 10. When it is necessary to lower the suspension height, valve C11 opens to release the gas in the air bladder 10 into the accumulator tank 60. When the pressure in the accumulator tank 60 reaches a certain level, the heating wire is activated in advance to raise the air temperature inside the filter cartridge 30 to 100 degrees Celsius. Then, valve B61 opens, and the high-pressure gas in the accumulator tank 60 pushes the hot air in the filter cartridge 30 towards the dry particles 32 and the filter screen, helping the moisture in the pores to evaporate, thereby regenerating the moisture absorption capacity of the dry particles 32 and removing dust from the surface of the filter screen. The air cartridge 30 is backflushed, thus improving its service life. After the filter cartridge 30 is backflushed, the reversing valve 40 connects it to the air pump 20 and connects the previously used filter element to the energy storage tank 60 for backflushing regeneration. It should be noted that there are usually four air bladders 10 connected in parallel. Each air bladder 10 is equipped with its own valve A51 and valve C11. In this application, for ease of demonstration and explanation, only one air bladder 10 is listed. In summary, the reversing valve 40 connects one filter cartridge 30 to the air pump 20 for normal dust filtration, avoiding any impact on the air bladder 10 and the air pump 20. At the same time, it connects the other filter cartridge 30 to the exhaust port of the air bladder 10, using the gas discharged from the air bladder 10 to backflush the filter cartridge 30, thereby helping the filter cartridge 30 remove dust and achieve a regeneration effect. The two filter cartridges 30 alternately perform the filtration and backflushing process, thus effectively improving the service life of the filter cartridge 30.

[0036] The above are merely embodiments of this application and are not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, improvements, or equivalent substitutions made within the spirit and principles of this application should be included within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

Claims

1. An automotive air suspension inflator characterized by comprising: It comprises an air bag (10), an air pump (20) and filter cartridges (30), the filter cartridges (30) are provided with two, the outlets of the two filter cartridges (30) are communicated with a four-way two-position reversing valve (40), the air inlet of the air pump (20) and the air outlet of the air bag (10) are communicated with the reversing valve (40).

2. The air suspension device for an automobile according to claim 1, wherein It also comprises a gas storage tank (50), which is connected in series between the air outlet of the air pump (20) and the air inlet of the air bag (10).

3. An air suspension device for a vehicle according to claim 2, wherein A valve A (51) is connected in series between the air bag (10) and the gas storage tank (50).

4. The air suspension device for an automobile according to claim 3, wherein An energy storage tank (60) is connected in series between the air outlet of the air bag (10) and the reversing valve (40), and a valve B (61) is connected in series between the outlet of the energy storage tank (60) and the reversing valve (40).

5. An air suspension device for a vehicle according to claim 4, wherein A valve C (11) is connected in series between the inlet of the energy storage tank (60) and the air outlet of the air bag (10).

6. An air suspension device for a vehicle according to claim 5, wherein The air pipe between the inlet of the energy storage tank (60) and the air outlet of the air bag (10) is of large flow.

7. An air suspension device for a vehicle according to claim 6, wherein The filter cartridges (30) are of a composite structure, the outer layer is a dustproof filter screen (31), and the inner layer is dry particles (32).

8. An air suspension device for a vehicle according to claim 7, wherein The filter cartridges (30) are provided with electric heating wires (33).

Images