CN210874692U

CN210874692U - Adsorption drying device

Info

Publication number: CN210874692U
Application number: CN201921751692.8U
Authority: CN
Inventors: 郭应辉
Original assignee: Shenzhen Biteman Technology Co Ltd
Current assignee: Shenzhen Biteman Technology Co Ltd
Priority date: 2019-10-18
Filing date: 2019-10-18
Publication date: 2020-06-30
Anticipated expiration: 2029-10-18

Abstract

The present disclosure discloses an adsorption drying device, which includes at least one first adsorption tube, at least one second adsorption tube, an upper cover plate, a lower cover plate, a control valve assembly and two one-way regulating valves. The upper cover plate is provided with a first upper air hole and a second upper air hole which are respectively communicated with the first adsorption pipe and the second adsorption pipe, and the first upper air hole and the second upper air hole on the upper cover plate are respectively connected with the air outlet through a first pipeline and a second pipeline. The first pipeline and the second pipeline are both provided with one-way regulating valves, each one-way regulating valve is provided with an air inlet port, an air outlet port and a throttling port, the air outlet port of the one-way regulating valve on the first pipeline and the air outlet port of the one-way regulating valve on the second pipeline are both communicated with a cavity, the cavity is communicated with the air outlet, and the air inlet port is connected with the first pipeline or the second pipeline.

Description

Adsorption drying device

Technical Field

The disclosure relates to the field of gas purification, in particular to an adsorption drying device.

Background

The adsorption drying device is usually provided with an adsorption tube inside, and an adsorbent is provided inside the adsorption tube, and the adsorbent can adsorb moisture in compressed gas or air, thereby removing saturated water vapor in the gas and drying the gas. Generally, the adsorption drying device is provided with two groups of adsorption tubes, one group of adsorption tubes and one group of regeneration tubes, and each group of adsorption tubes is correspondingly provided with a tubular air outlet buffer cavity and an air inlet buffer cavity. The air inlet is communicated with the adsorption tube through the air inlet buffer cavity, and the air outlet is communicated with the adsorption tube through the air outlet buffer cavity. And a control valve is arranged at the communication part of the air inlet buffer cavity and the air inlet to control the air inlet sequence of the two groups of adsorption tubes. The communicating part of the air outlet buffer cavity and the air outlet is provided with a check valve for controlling the on-off of air. The check valve generally comprises a sealing pressure plate, a guide rod and an elastic part sleeved with the guide rod. When air flows in the air outlet buffer cavity, the air flow pushes the sealing pressing plate to move so as to open the communication between the air outlet and the air outlet buffer cavity, and when no air flows through the air outlet buffer cavity, the one-way valve is closed. With the increasing demand of people for miniaturized equipment, the volume of the existing adsorption drying device is urgently needed to be reduced.

Disclosure of Invention

In order to solve the problem that the adsorption drying device existing in the related art is large in size, the present disclosure provides an adsorption drying device that can be miniaturized.

The present disclosure provides an adsorption drying device, including:

the adsorption device comprises at least one first adsorption pipe, at least one second adsorption pipe and a plurality of adsorption units, wherein the first adsorption pipe is filled with an adsorbent;

the first adsorption pipe and the second adsorption pipe alternately adsorb and regenerate;

the upper cover plate is arranged at the upper ends of the first adsorption pipe and the second adsorption pipe, a first upper air hole communicated with the first adsorption pipe and a second upper air hole communicated with the second adsorption pipe are formed in the upper cover plate, the first upper air hole is communicated with an air outlet through a first pipeline, and the second upper air hole is communicated with the air outlet through a second pipeline;

the lower cover plate is arranged at the lower ends of the first adsorption pipe and the second adsorption pipe, and a first lower air hole communicated with the first adsorption pipe and a second lower air hole communicated with the second adsorption pipe are formed in the lower cover plate;

the control valve assembly is arranged below the lower cover plate and comprises an air inlet valve assembly and an air outlet valve assembly, the air inlet valve assembly is used for controlling the first lower air hole and the second lower air hole of the lower cover plate to be communicated with an air inlet, and the air outlet valve assembly is used for controlling the first lower air hole and the second lower air hole of the lower cover plate to be communicated with an air outlet;

the first pipeline and the second pipeline are both provided with one-way regulating valves, each one-way regulating valve is provided with an air inlet port, an air outlet port and a throttling port, the air outlet port of the one-way regulating valve on the first pipeline is communicated with the air outlet port of the one-way regulating valve on the second pipeline to form a uniform cavity, the cavity is communicated with the air outlet, the air inlet port is connected with the first pipeline or the second pipeline, for each one-way regulating valve, part of air flow entering the air outlet port can flow to the air inlet port through the throttling port, and the air flow entering the air inlet port can push a valve core of the one-way regulating valve to be opened, so that the air flow entering from the air inlet port can completely flow out of the air outlet port.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

the present disclosure discloses an adsorption drying device, which includes at least one first adsorption tube, at least one second adsorption tube, an upper cover plate, a lower cover plate, a control valve assembly and two one-way regulating valves. The upper cover plate is provided with a first upper air hole communicated with the first adsorption pipe, the upper cover plate is provided with a second upper air hole communicated with the second adsorption pipe, the lower cover plate is provided with a first lower air hole communicated with the first adsorption pipe, the lower cover plate is provided with a second lower air hole communicated with the second adsorption pipe, the upper cover plate and the lower cover plate are of a plate-shaped structure and are of an integral structure, and the plate-shaped structure is provided with corresponding air holes communicated with the first adsorption pipe and the second adsorption pipe. Compared with the prior art, the scheme that the tubular air outlet buffer cavity or the tubular air inlet buffer cavity is arranged at the top or the bottom of the adsorption tube is adopted, and the thicknesses of the upper cover plate and the lower cover plate are reduced. In addition, the first upper air hole and the second upper air hole on the upper cover plate are respectively connected with the air outlet through a first pipeline and a second pipeline. The first pipeline with the second pipeline sets up one-way control valve and gas outlet intercommunication respectively, the one-way control valve on the first pipeline's the port of giving vent to anger is linked together with the one-way control valve's on the second pipeline the port homogeneous cavity of giving vent to anger, the cavity is linked together with the gas outlet, the inlet port is connected with first pipeline or second pipeline, so, can realize the scavenging air flow that flows from one of them pipeline, most flow direction gas outlet, the small part flows to another pipeline through one-way control valve, satisfy regeneration adsorption tube demand and the demand of gas end to the air flow. And, the one-way regulating valve of this disclosure sets up on first pipeline and second pipeline ingeniously. Compared with the prior art, the use of the check valve with large volume and heavy weight is reduced in the disclosure, as described in the background art, the check valve comprises a sealing pressure plate, a guide rod and an elastic part sleeved with the guide rod, and the principle of the check valve is that the air flow overcomes the pressure of a spring to push the sealing pressure plate to move along the guide rod, so that the pressure plate can be pushed to move only under the atmospheric flow (the air flow cannot push the check valve part to move when being small because a small part of regenerated air flow exists in an air outlet buffer cavity), the volume of the sealing pressure plate, the guide rod and the elastic part cannot be too small, so that the check valve is limited by the condition, and the volume of the existing adsorption drying device cannot be further reduced. In the adsorption drying device, the air flow is led out through the pipeline, and the one-way regulating valve is arranged on the pipeline for throttling and one-way conduction, so that the size of the adsorption drying device is greatly reduced, and the miniaturization of the whole product is facilitated.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a schematic perspective view of a drying and filtering device according to an embodiment of the disclosure.

Fig. 2 is a schematic cross-sectional view of fig. 1.

Fig. 3 is a schematic cross-sectional view of a first sorbent tube and a second sorbent tube of the present disclosure.

Fig. 4 is a schematic cross-sectional view of the upper cover plate.

Fig. 5 is a partial sectional view of the right side of fig. 1.

FIG. 6 is a cross-sectional schematic view of a control valve assembly.

Fig. 7 is a schematic perspective view of an adsorption drying apparatus in another embodiment.

Fig. 8 is a schematic cross-sectional view of fig. 7.

Detailed Description

For further explanation of the principles and construction of the present invention, reference will now be made in detail to the preferred embodiments of the present invention, which are illustrated in the accompanying drawings.

As shown in fig. 1 and fig. 2, fig. 1 is a schematic perspective view of a drying and filtering device according to an embodiment of the present disclosure, and fig. 2 is a schematic cross-sectional view of fig. 1. The adsorption drying device 100 includes a set of first adsorption tubes 111, a set of second adsorption tubes 112, an upper cover plate 12 disposed at the upper ends of the first adsorption tubes 111 and the second adsorption tubes 112, a lower cover plate 13 disposed at the lower ends of the first adsorption tubes 111 and the second adsorption tubes 112, a control valve assembly 14 disposed below the lower cover plate 13, and a one-way regulating valve 15 disposed at the outer side portions of the first adsorption tubes 111 and the second adsorption tubes 112.

As shown in fig. 3, which is a schematic cross-sectional view of the first adsorption tube and the second adsorption tube of the present disclosure, the first adsorption tube 111 and the second adsorption tube 112 are both filled with an adsorbent, and the adsorbent can be used for adsorbing moisture in the gas flow. The first adsorption pipe 111 and the second adsorption pipe 112 are respectively provided in two numbers, the two first adsorption pipes 111 are arranged side by side along the length direction of the lower cover plate 13, and the two second adsorption pipes 112 are arranged on one side of the first adsorption pipes 111 and arranged side by side along the length direction of the cover plate 13.

In operation, the first adsorption pipe 111 and the second adsorption pipe alternately adsorb and regenerate. Specifically, when the adsorbent of the first adsorption pipe 111 adsorbs the moisture dry gas flow, the adsorbent of the second adsorption pipe 112 is dehydrated and dried. When the adsorbent of the first adsorption pipe 111 is saturated with water, the operation mode is changed, that is, the adsorbent of the second adsorption pipe 112 adsorbs the water dry airflow, and the adsorbent of the first adsorption pipe 111 is dehydrated and dried. Thus, adsorption regeneration can be realized.

The gas flow used for dehydration drying of the adsorbent in the second adsorption tube 112 may be a small part of the gas flow dried in the first adsorption tube 111. The small part of the air flow is formed by shunting the air flow dried by the first adsorption pipe 111 through the one-way regulating valve 15, and most of the air flow dried by the first adsorption pipe 111 flows to the air using end through the air outlet.

The upper cover plate 12 has a plate-like structure. Corresponding upper air holes are formed in the upper cover plate 12 corresponding to each first adsorption pipe 111 and each second adsorption pipe 112 to communicate with each first adsorption pipe 111 and each second adsorption pipe 112. For example, the upper cover plate 12 is provided with at least one first upper air hole 121 corresponding to the first adsorption pipe 111; the upper cover plate 12 is provided with at least one second upper air hole 123 corresponding to the second adsorption pipe 112.

As shown in fig. 4, which is a schematic cross-sectional view of the upper cover plate, the upper cover plate 12 is further provided with an air flow channel, which communicates with the corresponding upper air holes of the same group of adsorption tubes. For example, a first air flow passage 122 is provided corresponding to the first adsorption tubes 111 of the same group, and the first air flow passage 122 converges the air flow of the first adsorption tubes 111 of the same group. A second gas flow passage 124 is provided corresponding to the second adsorption tubes 112 of the same group, and the second gas flow passage 124 converges the gas flows of the second adsorption tubes 112 of the same group.

One or more than two air flow channels can be arranged for each group of adsorption tubes. As shown in fig. 4, two first air flow passages 122 are provided for each group of first adsorption tubes 111, and two second air flow passages 124 are provided for each group of second adsorption tubes 112. The provision of more than two air flow passages for each set of adsorption tubes facilitates reduction in size of the air flow passages, thereby facilitating thinning and weight reduction of the upper cover plate 12. In addition, the arrangement of more than two air flow channels for each group of adsorption tubes is also suitable for the condition of large air flow.

Corresponding to each airflow channel, the side wall of the upper cover plate 12 is provided with an opening, and a joint for connecting a pipeline is arranged at each opening. As shown in fig. 4, corresponding to each first air flow channel 122, a first opening 125 is disposed on the sidewall of the upper cover plate 12, and the first air flow channel 122 communicates with the first upper air hole 121 and the second opening 125; corresponding to each second airflow channel 124, a second opening 126 is disposed on the sidewall of the upper cover plate 12, and the second airflow channel 124 communicates with the second upper air hole 123 and the second opening 126.

As shown in fig. 5, which is a partial sectional view of the right side of fig. 1, the first opening 125 of the upper cover plate 12 is connected to the first pipe 191 by a joint, and the second opening 126 is connected to the second pipe 192 by a joint. The first pipe 191 and the second pipe 193 are each provided with a check valve 15 for connection with the outlet filter 21. The air outlet port of the one-way regulating valve on the first pipeline 191 and the air outlet port of the one-way regulating valve of the second pipeline 193 are both communicated with a cavity. For example, the cavity may be formed inside the outgas filter. As shown in fig. 5, a cavity 211 is formed inside the outlet filter 21, the cavity 211 communicates with the outlet port 153 of the one-way regulating valve 15 on the first pipe 191 and the outlet port of the one-way regulating valve 15 on the second pipe 192, a filter element 212 for filtering impurities is disposed below the cavity, and the filter element 212 may be a PP cotton filter element or an activated carbon filter element. A cavity is formed above the filter element 212, and the air outlet port of the one-way regulating valve 15 on the first pipeline 191 is communicated with the air outlet port of the one-way regulating valve 15 on the second pipeline 192. The outlet 213 of the chamber 211 communicates with the gas outlet 103.

The check valve 15 is provided with an intake port 151, an outlet port 153, and an orifice (not shown). The inlet port 151 is connected to the first pipe 191 or the second pipe 192, and the outlet port 153 is connected to the outlet filter 21. Specifically, the one-way regulator valve 15 includes a valve seat 154, a valve body (not shown) provided on the valve seat 154, and a regulator screw 152. The inlet port 151 and the outlet port 153 are provided on a valve seat 154, and an orifice is provided between the valve seat 154 and the valve spool. The check valve 15 has a check function and a throttle function. Specifically, when air flows in from the inlet port 152, the air flow can push the valve core to open, so that the air flow entering the inlet port 152 can completely pass through and flow out from the outlet port 153. When the air flow is reversed, i.e. when the air flow enters from the outlet port 153, the air flow does not push the valve core open, but a part of the air flow passes through the restriction between the valve core and the valve seat and then flows out from the inlet port 151, so that most of the air flow entering the outlet port 153 is intercepted and a small part of the air flow can pass through the restriction.

Further, the air outlet port 154 of the one-way regulating valve 15 provided on the first pipe 191 communicates with the air outlet port of the one-way regulating valve 15 provided on the second pipe 192. Thus, when the first adsorption pipe 111 connected to the first pipe 191 performs adsorption drying of the air flow, the air flow flows from the first pipe 191 to the air outlet filter 21, wherein most of the air flow enters the filter element 212 of the air outlet filter 21 for filtering, and a small part of the air flow flows to the air outlet port of the one-way regulating valve 15 on the second pipe 192 through the cavity 211 at the top inside the air filter 21 and enters the second adsorption pipe 112 through the second pipe 192 to absorb moisture in the adsorbent in the second adsorption pipe 112 for regeneration. In contrast, when the second adsorption pipe 112 connected to the second pipeline 192 performs adsorption drying of the air flow, the air flow flows from the second pipeline 192 to the air outlet filter 21, most of the air flow enters the filter element 212 of the air outlet filter 21 for filtering and finally flows to the air using end, and a small part of the air flow flows to the air outlet port of the one-way regulating valve 15 on the first pipeline 191 through the cavity 211 at the top inside the air filter 21 and enters the first adsorption pipe 111 through the first pipeline 191 to absorb moisture of the adsorbent in the first adsorption pipe 111 for regeneration, so that the adsorbent in the first adsorption pipe 111 can be reused. In this way, the alternate adsorption and regeneration of the first adsorption pipe 111 and the second adsorption pipe 112 is achieved by the arrangement of the check valve 15.

In an embodiment, the adsorption drying device 100 is not provided with the outlet filter, in this way, a box body is arranged at the side part of the first adsorption pipe and the second adsorption pipe, a cavity is formed in the box body, the structure shape of the cavity can be similar to that of the cavity of the outlet filter, except that in this embodiment, no filter element is arranged inside the cavity. Therefore, in this embodiment, after the gas flows out of the gas outlet 153 of the one-way regulating valve 15, most of the gas flows to the gas outlet 103 through the cavity, except that a small part of the gas flows into another one-way regulating valve for regeneration.

Because the unidirectional check valve 15 is skillfully arranged on the first pipeline 191 and the second pipeline 192, most of the air flow flowing out of one pipeline flows out through the air outlet and a small part of the air flow enters the other pipeline through the regulating action of the unidirectional regulating valve 15. Compared with the prior art, the use of the check valve with large volume and heavy weight is reduced in the disclosure, as described in the background art, the check valve comprises a sealing pressure plate, a guide rod and an elastic part sleeved with the guide rod, and the principle of the check valve is that the air flow overcomes the pressure of a spring to push the sealing pressure plate to move along the guide rod, so that the pressure plate can be pushed to move only under the atmospheric flow (the air flow cannot push the check valve part to move when being small because a small part of regenerated air flow exists in an air outlet buffer cavity), the volume of the sealing pressure plate, the guide rod and the elastic part cannot be too small, so that the check valve is limited by the condition, and the volume of the existing adsorption drying device cannot be further reduced. In the adsorption drying device, the air flow is led out through the pipeline, and the one-way regulating valve is arranged on the pipeline for throttling and one-way conduction, so that the size of the adsorption drying device is greatly reduced, and the miniaturization of the whole product is facilitated.

With continued reference to fig. 5, the adsorption drying device 100 of the present disclosure further includes an intake air filter assembly 17. The intake air filter assembly 17 includes a housing 171. The housing 171 has a first chamber 172 and a second chamber 173 formed therein, and the first chamber 172 communicates the inlet port 101 with the second chamber 173. The second chamber 172 communicates with a gas inlet 1401 (shown in fig. 6) on the control valve assembly 14. At least one filtering steel net 175 is disposed in the first chamber 172, and a filter element 174 for filtering impurities is disposed in the second chamber 173. The filter element can be a PP cotton filter element or an active carbon filter element. As shown in fig. 5, the plurality of filter nets 175 are spaced apart in the height direction of the case 171. The stacked arrangement of the plurality of filter meshes 175 may enhance the filtering capability of the air flow.

Optionally, a pressure sensor 155 is further disposed on the top of the gas outlet filter 15 for detecting the gas pressure in the cavity 211.

The lower cover plate 13 is provided with a through hole 131 for communicating the first cavity 172 and the air inlet 101. The lower cover 13 is further provided with first lower air holes (not shown) communicating with the first adsorption tubes 111 and second lower air holes (not shown) communicating with the second adsorption tubes 112. The first lower air hole and the second lower air hole may be through holes.

Referring to fig. 6, which is a cross-sectional view of the control valve assembly, the control valve assembly 14 is disposed below the lower cover plate 13. The control valve assembly 14 includes a valve seat 140 having a gas inlet 1401 disposed on the valve seat 140, a gas inlet chamber 145 communicating with the gas inlet 1401, a gas outlet 1402, and a gas outlet chamber 148 communicating with the gas outlet 1402. The valve seat 140 is further provided with an intake valve assembly 14a and an exhaust valve assembly 14b, the intake valve assembly 14a is used for controlling the connection and disconnection between the intake chamber 145 and the first lower air hole on the lower cover plate 13, and the exhaust valve assembly 14b is used for controlling the connection and disconnection between the exhaust chamber 148 and the second lower air hole on the lower cover plate 13.

Two airflow chambers 149 are also provided on the valve seat 140, wherein one airflow chamber 149 communicates with the first lower airflow aperture 146 and the other airflow chamber 149 communicates with the second lower airflow aperture 147. The intake valve assembly 14a includes an intake air cylinder 142 and an intake pressure plate 141 pushed by the intake air cylinder 142, and the intake pressure plate 141 can block the communication port between the airflow chamber 149 and the intake chamber 145 when driven by the intake air cylinder 142. The exhaust valve assembly 14b comprises an exhaust cylinder 144 and an exhaust pressure plate 143 pushed by the exhaust cylinder 144, and the exhaust pressure plate 143 can block the communication opening of the airflow cavity 149 and the exhaust cavity 148 under the driving of the exhaust cylinder 144.

One exhaust valve assembly 14b and one intake valve assembly 14a are provided for each set of first adsorption tubes 111, and one exhaust valve assembly 14b and one intake valve assembly 14a are provided for each set of second adsorption tubes 112. When the gas inlet 1401 enters, one of the air inlet valve assemblies 14a is controlled to extend out of the blocking port, the other air inlet valve assembly 14a retracts to the original position, for example, when the first adsorption pipe 111 performs adsorption work, and the second adsorption pipe 112 performs regeneration work, the air inlet valve assembly 14a corresponding to the first adsorption pipe 111 is opened, the airflow flows into the airflow cavity 149 through the air inlet cavity 145, and then enters the first adsorption pipe 111 through the first lower vent 146 on the cover plate, and the exhaust valve assembly 14b corresponding to the first adsorption pipe 111 blocks the communication port of the airflow cavity 149 and the exhaust cavity 148; the inlet valve assembly 14a corresponding to the second adsorption tube 112 closes the communication port between the inlet chamber 145 and the air flow chamber 149, and the outlet valve assembly 14b corresponding to the second adsorption tube 112 opens the communication port between the air flow chamber 149 and the outlet chamber 148, so that the exhaust gas having absorbed moisture in the second adsorption tube 112 is discharged from the exhaust gas port 102 (shown in fig. 5).

Further, the adsorption drying device 100 of the present disclosure further includes a controller assembly 22, where the controller assembly 22 includes a controller, the controller is electrically connected to a plurality of electromagnetic valves, and each electromagnetic valve controls on/off of an air path corresponding to the intake cylinder or the exhaust cylinder, so that the intake cylinder or the exhaust cylinder performs an action to control the intake valve or the exhaust valve.

In the above embodiment, the adsorption drying device 100 includes one set of the first adsorption pipe 111 and one set of the second adsorption pipe 112, but is not limited thereto, and the adsorption drying device 100 may further include more than two sets of the first adsorption pipe and the second adsorption pipe.

In the above embodiment, each set of the first adsorption tubes 111 and each set of the second adsorption tubes 112 of the adsorption drying device 100 includes two, but not limited to, in another embodiment, each set of the first adsorption tubes may include one first adsorption tube and each second adsorption tube may include one second adsorption tube. As shown in fig. 7 and 8, fig. 7 is a schematic perspective view of an adsorption drying device in another embodiment, and fig. 8 is a schematic cross-sectional view of fig. 7, in this embodiment, each group of first adsorption tubes 31 of the adsorption drying device 100 includes one, and each group of second adsorption tubes 32 includes one. Correspondingly, since each group of the first adsorption pipes 31 comprises one first adsorption pipe, the air flow rate is relatively small, and therefore, corresponding to each group of the first adsorption pipes 31, the upper cover plate 33 can be provided with a first air flow passage communicated with the first adsorption pipes 31, and correspondingly, the side wall of the upper cover plate 33 is provided with a first opening. Similarly, a second airflow channel may be disposed on the upper cover plate 33 corresponding to each set of the second adsorption tubes 32 to communicate with the second adsorption tubes 32.

In the above embodiments, the first upper air hole of the upper cover plate is connected to the first pipeline through the first air flow channel, and the second upper air hole is connected to the second pipeline through the second air flow channel, but not limited thereto, in an embodiment, the first upper air hole and the second upper air hole of the upper cover plate may be through holes, so that the first pipeline and the second pipeline may be directly connected to the first upper air hole and the second upper air hole instead of the air flow channel, so that the through holes may communicate with the air outlet filter through the first pipeline or the second pipeline.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, but rather is intended to cover all equivalent structural changes made by the use of the specification and drawings.

Claims

1. An adsorption drying apparatus, comprising:

2. The adsorption drying device of claim 1, further comprising an outlet filter, wherein an outlet of the outlet filter is communicated with the outlet, the first pipeline is connected to one inlet of the outlet filter through the one-way regulating valve, the second pipeline is connected to the other inlet of the outlet filter through the one-way regulating valve, and the one inlet of the outlet filter is communicated with the other inlet of the outlet filter;

the cavity is formed in the air outlet filter, and a filter element for filtering impurities is arranged in the cavity.

3. The adsorption drying device of claim 2, wherein the one-way adjusting valve comprises a valve seat, and the valve core and the adjusting screw are disposed on the valve seat, the gas inlet port and the gas outlet port are disposed on the valve seat, the orifice is disposed between the valve seat and the valve core, and the gas outlet port is connected to the gas outlet filter.

4. The adsorption drying device of claim 2, wherein the first upper air hole and the second upper air hole are through holes, and the through holes are communicated with the air outlet filter through the first pipeline or the second pipeline.

5. The adsorption drying device of claim 1, wherein at least one first air flow channel communicated with the first upper air hole and at least one second air flow channel communicated with the second upper air hole are arranged in the cover plate, the first air flow channel is communicated with the first adsorption tubes in the same group, the first air flow channel is communicated with a first opening formed in the side wall of the cover plate, the first opening is connected with the first pipeline through a joint, the second air flow channel is communicated with the second adsorption tubes in the same group, the second air flow channel is communicated with a second opening formed in the side wall of the cover plate, and the second opening is connected with the second pipeline through a joint.

6. The adsorption drying device of claim 5,

a plurality of groups of first upper air holes are formed in the cover plate corresponding to each group of the first adsorption tubes, and a plurality of groups of second upper air holes are formed in the cover plate corresponding to each group of the second adsorption tubes;

the first air flow channels are arranged at intervals and are isolated from each other, each first air flow channel is communicated with one group of the first upper air holes, and each first air flow channel is communicated with one first opening hole arranged on the side wall of the cover plate;

the second airflow channels are arranged at intervals and are isolated from each other, each second airflow channel is communicated with one group of the second upper air holes, and each second airflow channel is communicated with one second opening hole arranged on the side wall of the cover plate.

7. The adsorption drying device of claim 1, further comprising an inlet air filter assembly, wherein the inlet air filter assembly comprises a housing, a first cavity and a second cavity are formed in the housing, the first cavity is communicated with the inlet and the second cavity, the second cavity is communicated with the gas inlet of the control valve assembly, at least one filtering steel mesh is arranged in the first cavity, and a filter element for filtering impurities is arranged in the second cavity.

8. The adsorption drying device of claim 7, wherein the filter steel net is provided in plurality, and the filter steel nets are spaced apart from each other in a height direction of the casing.

9. The adsorption drying apparatus of claim 7, wherein the control valve assembly comprises a valve seat, the valve seat is provided with a gas inlet, a gas inlet chamber communicated with the gas inlet, a gas outlet and a gas outlet chamber communicated with the gas outlet, the gas inlet valve assembly is arranged on the valve seat and used for controlling the connection and disconnection of the gas inlet chamber and the first lower vent or the second lower vent of the lower cover plate, and the gas outlet valve assembly is arranged on the valve seat and used for controlling the connection and disconnection of the gas outlet chamber and the first lower vent or the second lower vent of the lower cover plate.

10. The adsorption drying device of claim 9, further comprising a controller assembly, wherein the controller assembly comprises a controller, the controller is electrically connected with a solenoid valve, and the solenoid valve controls the on/off of the air path to enable the air inlet cylinder of the air inlet valve assembly or the air outlet cylinder of the air outlet valve assembly to perform actions.