A new type of high-efficiency automobile air dryer

Abstract

The present invention proposes a novel high-efficiency automobile air dryer, comprising a closed shell, a bottom cover, and a filter element, the bottom cover is provided with an air inlet and a threaded bayonet for connecting an external air pipeline; an inner liner is provided in the shell, an inner liner cover and a connecting plate are provided on the inner liner, the downwardly extending portion in the middle of the bottom of the connecting plate is sleeved outside the threaded bayonet of the bottom cover, the inner cavity of the inner liner constitutes a desiccant storage cavity, a spring is provided between the inner liner cover and the shell, the inner liner cover is provided with a channel communicating with the inner liner, the cavity between the inner liner and the shell constitutes an air channel, the filter element is provided at the upper part of the inner liner and communicates with the inner cavity of the inner liner, and a two-way bypass valve is also provided on the channel of the inner liner cover; a fixing rod is provided in the central vertical direction of the desiccant storage cavity, a spiral sheet is fixed on the fixing rod, and the outer contour of the spiral sheet is adapted to the inner wall of the inner liner. The present invention can filter oil stains in compressed air, completely remove moisture, ensure automobile braking performance, and improve safety.

Description

Technical Field

[0001] The invention relates to the technical field of air dryers, and in particular to a novel high-efficiency automobile air dryer. Background Art

[0002] The car air dryer is an indispensable part of the car, especially some heavy-duty cars. Its function is to dry the compressed air from the car's air pump so that the moisture contained in the gas will not enter the car's braking system through the gas, thereby keeping the car's braking system sensitive and effective.

[0003] Due to the serious oil leakage phenomenon of domestic air pumps, the air coming out of the air pump contains not only moisture, but also oil and solid impurities. The desiccant in the ordinary automobile air dryer can only absorb the moisture in the compressed air, but cannot filter the oil mist in the compressed air in advance. At the same time, the drying material in the air desiccant will lose its function of drying moisture after contacting with oil, which will quickly cause the dryer to fail, and then affect the braking performance of the car, posing a serious safety hazard; at the same time, due to the short service life of the desiccant, the maintenance cost is increased.

[0004] Patent application number 201820380584.3, "An Oil Filter Dryer Cylinder for Air Dryer", discloses a device that can prevent moisture and particulate matter contained in compressed air from entering the piping system behind the dryer. The device allows the compressed air to first pass through a filter element to filter the oil, and then pass through a molecular sieve to absorb the moisture.

[0005] The inventors found in the process of implementing the present invention that:

[0006] The technical solution of "An Oil Filter Dryer Cylinder for Air Dryer" with patent application number 201820380584.3 is being implemented. Since the three-dimensional installation space of the dryer reserved during the design of the whole vehicle is fixed, that is, the air dryer is limited by the installation space and the height cannot be designed to be too high. The height of the air dryer directly affects the height of the drying cylinder, which in turn makes the path of compressed air through the molecular sieve shorter. Because the air in the straight up and down air flow channel is in contact with the molecular sieve for a relatively short time, the moisture in the air is not completely absorbed and enters the subsequent pipeline system, affecting the sensitivity and effectiveness of the vehicle's braking system; at the same time, since the resistance will increase after a large amount of oil is adsorbed in the air dryer, the air supply pressure of the braking system will be insufficient, affecting the braking performance and posing a safety hazard. Summary of the invention

[0007] In order to solve the problems existing in the prior art, the present invention proposes a new type of high-efficiency automobile air dryer under the premise of ensuring that the compressed air does not carry oil and moisture after passing through the air dryer, while ensuring the air supply pressure and improving the safety performance.

[0008] To this end, the technical solution of the present invention is: a new type of high-efficiency automobile air dryer, including a shell with a closed upper end, a bottom cover threadedly connected to the bottom of the shell, and a filter element, the bottom cover is provided with an air inlet, and the middle of the bottom cover is provided with a threaded bayonet connected to an external gas pipeline; an inner liner is provided in the shell, an inner liner cover is provided on the top of the inner liner, and a connecting plate is provided at the bottom, the downwardly extending portion in the middle of the bottom of the connecting plate is sleeved outside the threaded bayonet of the bottom cover, and a sealing ring is provided at the abutting position, the inner cavity of the inner liner constitutes a desiccant storage cavity, a spring is clamped between the inner liner cover and the shell, the inner liner cover is provided with a channel communicating with the inner liner, and the cavity between the inner liner and the shell constitutes an air channel, characterized in that:

[0009] The filter element is arranged at the upper part of the inner tank, and a filter element installation cavity is preset in the upper part of the inner tank extending from the outside to the inside, and through holes are evenly distributed on the outer wall and the upper part of the inner wall of the filter element installation cavity. A filter element is installed in the filter element installation cavity, and the top and bottom of the filter element are respectively abutted against the inner tank cover and the bottom of the filter element installation cavity, and a sealing ring is provided at the abutting part;

[0010] A two-way bypass valve is provided just above the channel of the inner liner cover, and the two-way bypass valve is used to connect the air channels between the inner liner and the outer shell when the air dryer is in normal use or backwash cleaning; a gas diffusion plate is provided just below the channel of the inner liner cover, and a gap is provided between the gas diffusion plate and the inner liner cover for gas flow and diffusion, and through holes are arranged on the gas diffusion plate for gas to pass evenly;

[0011] The middle of the connecting plate is provided with a groove extending into the inner pot, the side walls of the groove are evenly provided with air outlet holes, the inner ends of the air outlet holes are provided with filter discs, and the groove is connected with the threaded bayonet of the bottom cover; the cavity formed between the bottom surface of the connecting plate and the bottom cover, the air passage between the inner pot and the outer shell, and the air inlet on the bottom cover are connected;

[0012] A fixing rod is arranged in the center of the desiccant storage cavity and between the gas diffusion plate and the connecting plate, and a spiral piece is passed through and fixed on the fixing rod, and the outer contour of the spiral piece is adapted to the inner wall size of the inner container.

[0013] Preferably, the two-way bypass valve is arranged at the center of the top of the inner tank cover, including a cylindrical valve seat, the upper end of the cylinder is provided with an L-shaped inner edge extending toward the center and then downward, and the lower end is provided with an outer edge extending outward, the lower end of the spring between the inner tank cover and the outer shell abuts against the outer edge and is sandwiched between the valve seat and the outer baffle, the valve seat is fixed to the inner tank cover through the outer edge, and the channel on the inner tank cover is located directly below the valve seat;

[0014] A cylindrical valve body is provided in the valve seat, and the top of the valve body extends out from the valve seat and slides with the vertical section of the L-shaped inner edge of the upper end of the valve seat. Through holes are evenly distributed on the cylindrical wall of the valve body, and the upper end of the valve body extends toward the center and is provided with a U-shaped edging with an opening facing outward, in which a gasket fixing plate extending outward is fixed, and the gasket fixing plate has side edges extending downward all around, and a sealing gasket abutting against the side edges and the valve body is fixed at the bottom of the gasket fixing plate, and in a closed state, the bottom of the sealing gasket fits with the horizontal section of the L-shaped inner edge of the valve seat; the lower end of the valve body is provided with an inner flange and an outer flange bent inwardly and outwardly, and the inner cavity of the valve body is slidably cooperated with a sealing gasket and a fixing plate for supporting the sealing gasket, a first compression spring is provided between the inner flange at the lower end of the valve body and the fixing plate, a corresponding spring limiting portion is provided on the fixing plate, and a second compression spring is provided between the outer flange at the lower end of the valve body and the lower end of the vertical section of the L-shaped inner edge of the valve seat;

[0015] In the non-working state, under the action of the second spring, the valve seat and the valve body are fitted together through the sealing gasket, and the passage out of the inner cavity of the valve body is in a closed state; under the action of the first spring, the fixed plate and the bottom of the U-shaped edge of the valve body are fitted together through the sealing gasket, and the passage into the inner cavity of the valve body is in a closed state;

[0016] This two-way bypass valve has an ingenious structural design, low manufacturing cost and easy installation. The corresponding channels can be opened by positive and reverse airflow pressure and can be reset by compressing the spring. It does not need to be controlled by other control systems, is not easy to damage and is easy to maintain.

[0017] Preferably, the desiccant is a molecular sieve, silica gel, or cellulose particles, all of which have good water absorption capabilities.

[0018] Preferably, the filter element includes upper and lower end covers, a supporting frame and filter material, the upper and lower end covers are made of metal or plastic, the supporting frame is made of metal or plastic on the inner side of the filter element, and there are air inlet and outlet holes on the supporting frame. The filter material is made of synthetic fiber with oil absorption function, or non-woven fabric, or filter paper, or a combination of the three, and has the function of absorbing oil and particulate impurities in the air passing through the filter material.

[0019] Beneficial effects: The present invention can ensure the dryness and cleanliness of the braking system, thereby ensuring the braking performance of the vehicle and improving the safety of the driver.

[0020] The spiral blade guide is set in the inner tank to make the path of air passing through the desiccant longer than that of the existing air dryer, ensuring that the filtered air enters the desiccant and completely removes moisture before entering other components;

[0021] A two-way bypass valve is arranged on the inner tank cover. In normal operation, the compressed air first passes through the filter element and then enters the dryer for drying before entering the subsequent pipeline. However, as the filter element absorbs and holds more and more oil and particulate impurities, the resistance of the filter element will increase accordingly. At this time, under a certain pressure, the sealing gasket and the fixing plate in the valve body of the two-way bypass valve will slide downward along the inner wall of the valve body, and the compressed air will enter the cavity between the valve seat and the valve body through the through hole on the upper part of the valve body, and then enter the cavity under the valve body from the through hole on the valve body located under the fixing plate, and then enter the desiccant storage chamber for drying, thereby making up for the insufficient air supply pressure entering the brake system through the filter element, ensuring the braking performance and eliminating safety hazards.

[0022] When the car back-blows and cleans the dryer by itself, part of the air flow is back-blown out through the filter element, and the other part of the air flow causes the valve body to slide upward along the inner edge of the valve seat and extend out of the valve seat surface through the air pressure. The air flow enters the air channel between the inner tank and the outer shell through the through hole on the valve body extending out of the valve seat surface and is back-blown out, thereby improving the back-blow cleaning efficiency and ensuring the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is the front view of the present invention.

[0024] Figure 2 It is a schematic diagram of the two-way bypass valve of the present invention in a non-working state.

[0025] Figure 3 It is a schematic diagram of the two-way bypass valve of the present invention in the intake state.

[0026] Figure 4 It is a schematic diagram of the two-way bypass valve of the present invention in a gas outlet state.

[0027] Figure 5 It is a schematic diagram of the air flow path of the present invention during normal use.

[0028] Figure 6 It is a schematic diagram of the flow path of the airflow during backwash cleaning of the present invention.

[0029] As shown in the figure: 1. outer shell; 2. bottom cover; 21. air inlet; 22. threaded bayonet; 3. filter element; 4. liner; 41. through hole; 5. liner cover; 51. channel; 6. connecting plate; 61. air outlet; 62. filter disc; 7. spring; 8. gas diffusion plate; 81. through hole; 9. two-way bypass valve; 91. valve seat; 911. L-shaped inner edge; 912. outer edge; 92. valve body; 921. through hole; 922. U-shaped edging; 923. inner fold; 924. outer fold; 93. gasket fixing plate; 94. sealing gasket; 95. sealing gasket; 96. fixing plate; 97. first compression spring; 98. second compression spring; 10. fixing rod; 11. spiral sheet. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings, but this embodiment should not be understood as limiting the present invention.

[0031] The present invention Figures 1 to 6 As shown:

[0032] A novel high-efficiency automobile air dryer comprises a shell 1 with a closed upper end, a bottom cover 2 threadedly connected to the bottom of the shell, and a filter element 3. The bottom cover 2 is provided with an air inlet 21, and the middle of the bottom cover is provided with a threaded bayonet 22 connected to an external air pipeline; an inner liner 4 is provided in the shell, an inner liner cover 5 is provided on the top of the inner liner, and a connecting plate 6 is provided at the bottom. The downwardly extending portion in the middle of the bottom of the connecting plate is sleeved outside the threaded bayonet of the bottom cover, and a sealing ring is provided at the abutting portion. The inner cavity of the inner liner constitutes a desiccant storage cavity, and the desiccant storage cavity is filled with desiccant. A spring 7 is clamped between the inner liner cover and the shell, and a channel communicating with the inner liner is provided on the inner liner cover. The cavity between the inner liner and the shell constitutes an air channel;

[0033] The filter element 3 is arranged on the upper part of the inner tank 4. The upper part of the inner tank is extended from the outside to the inside to preset a filter element installation cavity. The outer wall of the filter element installation cavity and the upper part of the inner wall are evenly provided with through holes 41. The filter element is installed in the filter element installation cavity. The top and bottom of the filter element are respectively abutted against the inner tank cover and the bottom of the filter element installation cavity, and a sealing ring is provided at the abutting part.

[0034] A two-way bypass valve 9 is provided on the channel of the inner liner cover 5, and the two-way bypass valve is used to control the channel on the inner liner cover and the air channel between the inner liner and the outer shell to be connected or closed when the air dryer is in normal use or backwashing cleaning; a gas diffusion plate 8 is provided just below the channel of the inner liner cover, and a gap is provided between the gas diffusion plate and the inner liner cover for gas flow and diffusion, and through holes 81 are arranged on the gas diffusion plate for gas to pass evenly;

[0035] The middle of the connecting plate 6 is provided with a groove extending into the inner pot, the side walls of the groove are evenly provided with air outlet holes 61, the inner ends of the air outlet holes are provided with filter discs 62, and the groove is connected with the threaded bayonet of the bottom cover; the cavity formed between the bottom surface of the connecting plate 6 and the bottom cover 2, the air passage between the inner pot 4 and the outer shell 1, and the air inlet 21 on the bottom cover 2 are connected;

[0036] A fixing rod 10 is provided in the center of the desiccant storage cavity between the gas diffusion plate 8 and the connecting plate 6, and a spiral piece 11 is passed through and fixed on the fixing rod, and the outer contour of the spiral piece is adapted to the inner wall size of the inner container.

[0037] The two-way bypass valve 9 is arranged at the center of the top of the inner tank cover 5, and includes a cylindrical valve seat 91. The upper end of the cylinder is provided with an L-shaped inner edge 911 extending toward the center and then downward, and the lower end is provided with an outer edge 912 extending outward. The lower end of the spring between the inner tank cover and the outer shell abuts against the outer edge and is sandwiched between the valve seat and the outer baffle. The valve seat 91 is fixed to the inner tank cover through the outer edge 912, and the channel 51 on the inner tank cover is located directly below the valve seat;

[0038] A cylindrical valve body 92 is arranged in the valve seat, the top of the valve body extends from the valve seat and slides with the vertical section of the L-shaped inner edge 911 at the upper end of the valve seat, through holes 921 are evenly distributed on the cylindrical wall of the valve body, the upper end of the valve body extends toward the center and is provided with a U-shaped edging 922 opening outward, a gasket fixing plate 93 extending outward is fixed in the edging, the gasket fixing plate has side edges extending downwardly, and a sealing gasket 94 abutting against the side edges and the valve body is fixed at the bottom of the gasket fixing plate, which is sealed in the closed state. The bottom of the gasket fits with the horizontal section of the L-shaped inner edge of the valve seat; the lower end of the valve body 92 is provided with an inner flange 923 and an outer flange 924 bent inwardly and outwardly, and the inner cavity of the valve body is slidably matched with a sealing gasket 95 and a fixing plate 96 for supporting the sealing gasket, a first compression spring 97 is provided between the inner flange at the lower end of the valve body and the fixing plate, and a corresponding spring limiter is provided on the fixing plate, and a second compression spring 98 is provided between the outer flange at the lower end of the valve body and the lower end of the vertical section of the L-shaped inner edge of the valve seat;

[0039] In the non-working state, under the action of the second spring, the valve seat and the valve body fit together through the sealing gasket, and the passage out of the inner cavity of the valve body is in a closed state; under the action of the first spring, the fixed plate and the U-shaped edge bottom of the valve body fit together through the sealing gasket, and the passage into the inner cavity of the valve body is in a closed state.

[0040] The desiccant is a molecular sieve, silica gel, or cellulose particles, all of which have the function of absorbing water.

[0041] The filter element 3 is of prior art (not shown in the figure), including upper and lower end covers, a support frame and filter material. The upper and lower end covers are made of metal or plastic. The support frame is made of metal or plastic on the inner side of the filter element. There are air inlet and outlet holes on the support frame. The filter material adopts synthetic fiber with oil absorption function, or non-woven fabric, or filter paper, or a combination of the three, which has the function of absorbing oil and particulate impurities in the air passing through the filter material.

[0042] When compressed air enters the air dryer from the air inlet of the chassis, it passes through the cavity between the bottom surface of the connecting plate and the bottom cover, and the air channel between the side wall of the inner tank and the outer shell in turn. Under the action of compressed air, the compressed air enters the desiccant storage chamber through the filter element; when the filter element absorbs too much oil and the resistance is too large, the compressed air reaches a certain pressure, and the two-way bypass valve 9 will open (the sealing gasket 95 and the fixing plate 96 slide downward under the action of air pressure and compress the spring), and the compressed air will enter the cavity between the valve seat and the valve body through the through hole on the upper part of the valve body, and then enter the cavity under the valve body from the through hole on the valve body located under the fixing plate, and then enter the desiccant storage chamber for drying, thereby making up for the insufficient air supply pressure entering the brake system through the filter element. The two parts of the air flow pass through the desiccant storage chamber through the spiral guide, and come out from the air outlet of the connecting plate, pass through the threaded bayonet, and then enter the brake system of the car through the pipe connected to the threaded bayonet. ( Figure 5 shown)

[0043] When the air dryer needs backwash cleaning, the airflow passes through the threaded bayonet and enters the desiccant storage chamber from the air outlet of the connecting plate. It is divided at the upper part of the desiccant storage chamber. One part of the airflow passes through the filter element and enters the air channel between the side wall of the inner tank and the outer shell, taking away oil, impurities and some moisture. The other part of the airflow passes through the channel of the inner tank cover. Under the action of the airflow pressure, the valve body of the two-way bypass valve 9 slides upward along the inner edge of the valve seat and extends out of the valve seat surface. The airflow enters the air channel between the inner tank and the outer shell through the through hole on the valve body extending out of the valve seat surface. The two parts of the airflow pass through the cavity between the bottom surface of the connecting plate and the bottom cover and come out from the air inlet of the bottom plate. ( Figure 6 shown)

[0044] Parts not described in detail in this specification are inherent functions of technologies or components known in the art.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A novel high-efficiency automobile air dryer, comprising a shell with a closed upper end, a bottom cover threadedly connected to the bottom of the shell, and a filter element, wherein the bottom cover is provided with an air inlet, and the middle of the bottom cover is provided with a threaded bayonet connected to an external gas pipeline; an inner liner is provided in the shell, an inner liner cover is provided on the top of the inner liner, and a connecting plate is provided at the bottom, a downwardly extending portion in the middle of the bottom of the connecting plate is sleeved outside the threaded bayonet of the bottom cover, and a sealing ring is provided at the abutting portion, the inner cavity of the inner liner constitutes a desiccant storage cavity, a spring is clamped between the inner liner cover and the shell, a channel communicating with the inner liner is provided on the inner liner cover, and the cavity between the inner liner and the shell constitutes an air channel, characterized in that: The filter element is arranged at the upper part of the inner tank, and a filter element installation cavity is preset in the upper part of the inner tank extending from the outside to the inside, and through holes are evenly distributed on the outer wall and the upper part of the inner wall of the filter element installation cavity. A filter element is installed in the filter element installation cavity, and the top and bottom of the filter element are respectively abutted against the inner tank cover and the bottom of the filter element installation cavity, and a sealing ring is provided at the abutting part; A two-way bypass valve is provided just above the channel of the inner liner cover, and the two-way bypass valve is used to connect the air channels between the inner liner and the outer shell when the air dryer is in normal use or backwash cleaning; a gas diffusion plate is provided just below the channel of the inner liner cover, and a gap is provided between the gas diffusion plate and the inner liner cover for gas flow dispersion, and through holes are arranged on the gas diffusion plate for gas to pass evenly; The middle of the connecting plate is provided with a groove extending into the inner pot, the side walls of the groove are evenly provided with air outlet holes, the inner ends of the air outlet holes are provided with filter discs, and the groove is connected with the threaded bayonet of the bottom cover; the cavity formed between the bottom surface of the connecting plate and the bottom cover, the air passage between the inner pot and the outer shell, and the air inlet on the bottom cover are connected; A fixing rod is provided in the center of the desiccant storage cavity between the gas diffusion plate and the connection plate, and a spiral sheet is fixed on the fixing rod, and the outer contour of the spiral sheet is adapted to the inner wall size of the inner container; The two-way bypass valve is arranged at the center of the top of the inner tank cover, and includes a cylindrical valve seat, the upper end of the cylinder is provided with an L-shaped inner edge extending toward the center and then downward, and the lower end is provided with an outer edge extending outward, the lower end of the spring between the inner tank cover and the outer shell abuts against the outer edge and is sandwiched between the valve seat and the outer baffle, the valve seat is fixed to the inner tank cover through the outer edge, and the channel on the inner tank cover is located directly below the valve seat; A cylindrical valve body is provided in the valve seat, and the top of the valve body extends out from the valve seat and slides with the vertical section of the L-shaped inner edge of the upper end of the valve seat. Through holes are evenly distributed on the cylindrical wall of the valve body, and the upper end of the valve body extends toward the center and is provided with a U-shaped edging with an opening facing outward, in which a gasket fixing plate extending outward is fixed, and the gasket fixing plate has side edges extending downward all around, and a sealing gasket abutting against the side edges and the valve body is fixed at the bottom of the gasket fixing plate, and in a closed state, the bottom of the sealing gasket fits with the horizontal section of the L-shaped inner edge of the valve seat; the lower end of the valve body is provided with an inner flange and an outer flange bent inwardly and outwardly, and the inner cavity of the valve body is slidably cooperated with a sealing gasket and a fixing plate for supporting the sealing gasket, a first compression spring is provided between the inner flange at the lower end of the valve body and the fixing plate, a corresponding spring limiting portion is provided on the fixing plate, and a second compression spring is provided between the outer flange at the lower end of the valve body and the lower end of the vertical section of the L-shaped inner edge of the valve seat; In the non-working state, under the action of the second spring, the valve seat and the valve body are fitted together through the sealing gasket, and the passage out of the inner cavity of the valve body is in a closed state; under the action of the first spring, the fixed plate and the bottom of the U-shaped edge of the valve body are fitted together through the sealing gasket, and the passage into the inner cavity of the valve body is in a closed state; The desiccant is a molecular sieve, or silica gel, or cellulose particles; The filter element includes upper and lower end covers, a support frame and filter material. The upper and lower end covers are made of metal or plastic. The support frame is made of metal or plastic on the inner side of the filter element. There are air inlet and outlet holes on the support frame. The filter material adopts synthetic fiber with oil absorption function, or non-woven fabric, or filter paper, or a combination of the three, and has the function of absorbing oil and particulate impurities in the air passing through the filter material.

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