Double-tower air conversion type air drying device

Abstract

The present application relates to a kind of double-tower conversion type air drying device, it relates to air dryer technical field.It includes first drying tower and second drying tower, the first drying tower and second drying tower between being provided with inlet valve, the first drying tower and second drying tower between being provided with outlet check valve, the outlet check valve with first drying tower and second drying tower are all communicated and set;Drying cavity is opened in the first drying tower and second drying tower, the drying cavity is provided with partition, the partition is provided with one functional bag, the partition is provided with several, the functional bag is molecular sieve bag, the functional bag is used to place dry adsorbent, the first drying tower and second drying tower between being provided with blowdown valve, the blowdown valve with first drying tower and second drying tower are all communicated and set by a valve.The present application has the effect of reducing dust accumulation in dryer.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of air drying, in particular to a double-tower air drying device. BACKGROUND

[0002] With the development of vehicle braking technology, the air brake chassis system is an important way of domestic automobile braking. After the air compressor compresses the air, the compressed air containing a large amount of water and also carrying oil, coke, dust and the like flows into the brake pipeline system, thereby causing great harm to the automobile braking system, such as the electronic equipment, rubber seals and other components in the braking system will be severely damaged, thereby reducing the safety performance and use reliability of the automobile. Therefore, the automobile generally uses an air dryer to remove water, oil, coke, dust and the like in the compressed air, and at the same time adjusts the pressure of the compressed air supplied to the brake pipeline system.

[0003] However, the conventional air drying device, due to the compression of water, dust and the like in the air during operation, dust is often accumulated in the drying device, which is easy to cause wear to the braking equipment, thereby affecting the drying efficiency of the drying device, and needs to be improved. SUMMARY

[0004] In order to improve the problem that the air drying device in the related art is easy to accumulate dust, the present application provides a double-tower air drying device.

[0005] The double-tower air drying device provided by the present application adopts the following technical scheme:

[0006] A double-tower air drying device, comprising a first drying tower and a second drying tower, an air inlet reversing valve is arranged between the first drying tower and the second drying tower, an air outlet check valve is arranged between the first drying tower and the second drying tower, and the air outlet check valve is in communication with the first drying tower and the second drying tower; a drying cavity is formed in the first drying tower and the second drying tower, a partition plate is arranged in the drying cavity, a functional bag is arranged on the partition plate, the partition plate is provided with a plurality of functional bags, the functional bag is a molecular sieve bag, the functional bag is used for placing a drying adsorbent, a blowdown valve is arranged between the first drying tower and the second drying tower, and the blowdown valve is in communication with the first drying tower and the second drying tower through a valve.

[0007] By adopting the above technical scheme, when the saturated wet air enters into the drying device, enters into a drying tower through the opened valve, removes larger water droplets, oil droplets and dust through the high-efficiency centrifugal oil-water separator in the drying tower, and then absorbs moisture through the adsorbent, the dried air after the drying tower is dried opens the air outlet check valve by means of pressure; when the regeneration state of a drying tower reaches the set time, the electric control stops supplying power to the valve, at this time, the two electromagnetic valves are in power-off state, and the two blow-off ports of the blow-off valve are also in closed state. Therefore, one drying tower continues to dry while the other drying tower stops regeneration. Part of the dried air still continuously charges into the drying tower, and the drying tower with charged air gradually increases the pressure, and the drying tower is in the "charging state" (pressure increase) during this period, that is, flexible conversion can be achieved, and then the electric control starts to supply power to the valve. At this time, the drying and regeneration of the two drying towers are converted with each other. Thus, the problem of easy accumulation of dust when the single drying tower dries air is improved.

[0008] Optionally, a commutation hole is formed in the air outlet check valve, and the commutation hole is in communication with the first drying tower and the second drying tower.

[0009] By adopting the above technical scheme, the dried air is sent to the total air cylinder, the left and right air inlet chambers of the air outlet check valve are connected through the commutation hole, part of the dried air treated by one drying tower flows to the other drying tower through the small hole, is blown from the upper part of the other drying tower to the adsorbent to absorb the moisture (regeneration) in the adsorbent, and the water droplets, oil droplets and dust in the lower part of the centrifugal oil-water separator are discharged from the blow-off valve port. Thus, the energy utilization rate in the drying tower is improved.

[0010] Optionally, a material replacement support is arranged outside the first drying tower and the second drying tower, a material replacement connecting rod is rotatably connected to the side wall of the material replacement support, a material replacement plate is detachably connected to the side wall of the material replacement connecting rod, a material replacement groove is formed in the side wall of the first drying tower and the second drying tower close to the material replacement plate, the material replacement groove is in communication with the drying cavity, and the material replacement plate is inserted into the material replacement groove by rotating the material replacement connecting rod.

[0011] By adopting the above technical scheme, when the bagged adsorbent in the drying cavity is used for a long time, the material replacement connecting rod is rotated to the vicinity of one drying tower, and the adsorbent on the partition plate in the original drying cavity is replaced through the material replacement groove, so that the convenience of drying the adsorbent in the drying tower is improved.

[0012] Optionally, the refueling connecting rod comprises a connecting rod and a positioning rod, the connecting rod is rotationally connected with the refueling support, the positioning rod is arranged at one end of the connecting rod away from the refueling support, the positioning rod is rotationally connected with the connecting rod, one end of the positioning rod away from the connecting rod is provided with a material taking mechanism, a refueling box is arranged on the side wall of the positioning rod, the refueling plate is located in the refueling box, and the refueling box is located below the material taking mechanism.

[0013] By adopting the above technical scheme, the positioning rod is rotationally connected with the connecting rod, so that when the refueling box is rotated in the direction of the drying tower, the refueling box is always parallel to the refueling groove on the drying tower, thereby facilitating the replacement of new adsorbent in the refueling box.

[0014] Optionally, the side wall of the positioning rod is provided with a lifting mechanism, the lifting mechanism comprises a lifting plate, a lifting gear, an engagement plate strip and a lifting motor, the side wall of the positioning rod is provided with an engagement tooth, the lifting plate is hollow, the engagement tooth is inserted into the lifting plate, the lifting gear is located on one side of the engagement tooth, the lifting gear is located in the lifting plate, the positioning rod abuts against the inner side wall of the lifting plate, the engagement plate strip is located in the lifting plate, the engagement plate strip is engaged with the lifting gear, the engagement plate strip abuts against the inner side wall of the lifting plate, the lifting motor is arranged on the lifting plate, the lifting motor is used to drive the lifting gear to rotate, and the material taking mechanism and the refueling box are located on the engagement plate strip.

[0015] By adopting the above technical scheme, since the refueling box and the material taking mechanism are located at different heights, the structure of the lifting plate, the lifting gear, the engagement plate strip and the lifting motor can select the material taking mechanism or the refueling box at the parallel height of the positioning rod and the refueling groove, the material taking mechanism is parallel to the refueling groove when the drying part in the drying tower needs to be taken out, and the refueling box is at the same height as the refueling groove when new adsorbent needs to be replaced into the drying tower.

[0016] Optionally, the drying cavity is provided with a drying part, the partition plate is connected with the inner side wall of the drying part, the first drying tower and the second drying tower are provided with a sliding mechanism, the sliding mechanism comprises a driving motor and a driving gear, the driving motor is arranged on the side wall of the first drying tower, the driving gear is arranged on the output end of the driving motor, a driving groove is formed in the bottom wall of the drying cavity, the driving gear is located in the driving groove, the bottom wall of the drying part is provided with an engagement plate strip 283, and the driving gear is engaged with the engagement plate strip 283.

[0017] By adopting the above technical scheme, the sliding mechanism can abut against the bottom wall of the drying part during the refueling process, and the drying part can be moved out of the drying cavity to the material taking mechanism by driving the driving gear to rotate by the driving motor, so as to complete the material taking.

[0018] Optionally, a sealing plate is arranged on the bottom wall of the drying part, the sealing plate is connected with the bottom wall of the drying part, and the driving gear and the driving motor are arranged on the side of the sealing plate close to the drying part.

[0019] By adopting the above technical scheme, the structure of the sealing plate increases the air tightness of the drying tower during the material replacement process, and further improves the air drying efficiency.

[0020] Optionally, a plurality of material replacement plates are arranged in the material replacement box, the number of the plurality of material replacement plates is consistent with the number of the partition plates in the first drying tower or the second drying tower, a pushing block is arranged on the side wall of the material replacement box, a pushing cylinder is arranged on the top wall of the pushing block, the pushing cylinder is arranged towards the material replacement plates, and the pushing cylinder is used to push the material replacement plates into the drying cavity.

[0021] By adopting the above technical scheme, the number of the material replacement plates is consistent with the number of the partition plates, so that all the adsorbents in the drying tower can be replaced at the same time, the replacement efficiency of the adsorbents is improved, and the structure of the pushing cylinder can push the plurality of material replacement plates into the drying cavity as a whole, and the convenience of replacing the adsorbents is further improved.

[0022] Optionally, a positioning magnet is arranged on the side wall of the material replacement box, a connecting magnet is arranged on the side wall of the first drying tower or the second drying tower close to the material replacement box, and the positioning magnet and the connecting magnet are magnetically attracted.

[0023] By adopting the above technical scheme, the structure of the positioning magnet makes the material replacement box and the material replacement groove more stable when the adsorbents are replaced.

[0024] Optionally, four positioning magnets are arranged at the side wall corners of the material replacement box, and the connecting magnet is correspondingly arranged on the side wall of the first drying tower or the second drying tower close to the positioning magnet.

[0025] By adopting the above technical scheme, the positioning magnet and the connecting magnet are located at the corners, so that when the four positioning magnets and the connecting magnet are magnetically attracted, the material replacement box and the material replacement groove completely correspond, and the stability of replacing the adsorbents is further improved.

[0026] In summary, the present application has at least one of the following beneficial effects:

[0027] 1. When the saturated wet air is introduced into the drying device, it enters into a drying tower through the open valve, and then passes through the high-efficiency centrifugal oil-water separator in the drying tower to remove large water droplets, oil droplets and dust, and then absorbs moisture through the adsorbent. The dried air after the drying tower is dried by opening the outlet check valve with the help of pressure. When the regeneration state of a drying tower reaches the set time, the electric control stops supplying power to the valve. At this time, both electromagnetic valves are in a power-off state, and the two blowdown ports of the blowdown valve are also in a closed state. Therefore, one drying tower continues to dry while the other drying tower stops regeneration. Part of the dried air is still continuously charged into the drying tower, and the drying tower with charged air gradually increases the pressure without discharge. The drying tower is in the "charging state" (pressure increase) during this period, that is, flexible conversion can be achieved. Then the electric control starts to supply power to the valve. At this time, the drying and regeneration of the two drying towers are converted with each other. Thus, the problem of easy accumulation of dust when drying air in a single drying tower is improved.

[0028] 2. The dried air is sent to the total air cylinder, and the left and right air inlet chambers of the outlet check valve are connected through the commutation hole. The dried air treated by one drying tower flows to the other drying tower through the small hole, blows from the upper part of the other drying tower to the adsorbent, absorbs the moisture in the adsorbent (regeneration), and carries the water droplets, oil droplets and dust at the lower part of the centrifugal oil-water separator out of the blowdown valve port. Thus, the energy utilization rate in the drying tower is improved. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of an embodiment of the present application;

[0030] Figure 2 It is a structural schematic diagram for embodying the connection relationship between the lifting motor and the lifting plate in an embodiment of the present application;

[0031] Figure 3 It is a structural schematic diagram for embodying the connection relationship between the reloading box and the lifting mechanism in an embodiment of the present application;

[0032] Figure 4 It is a structural schematic diagram for embodying the connection relationship between the reloading box and the lifting mechanism in an embodiment of the present application; Figure 3

[0033] ​In the figure: 11, first drying tower; 12, second drying tower; 13, air inlet reversing valve; 14, air outlet check valve; 15, drying cavity; 16, partition plate; 17, blowdown valve; 18, flow reversing hole; 2, material replacement support; 21, material replacement connecting rod; 22, material replacement plate; 23, material replacement groove; 24, connecting rod; 25, positioning rod; 26, material taking mechanism; 27, material replacement box; 28, lifting mechanism; 281, lifting plate; 282, lifting gear; 283, meshing plate; 284, lifting motor; 285, engaging magnet. DETAILED DESCRIPTION

[0034] The application will be further described below with reference to the accompanying drawings. Figures 1-4 The application will be further described below with reference to the accompanying drawings.

[0035] Example 1

[0036] The embodiment of the application discloses a double-tower flow-reversing air drying device. Figure 1 The double-tower flow-reversing air drying device comprises a material replacement support 2, one side of the material replacement support 2 is provided with a first drying tower 11 and a second drying tower 12, and the first drying tower 11 and the second drying tower 12 are vertically arranged. An air inlet reversing valve 13 is arranged between the first drying tower 11 and the second drying tower 12, the air inlet reversing valve 13 is an electromagnetic valve, by opening or closing the air inlet reversing valve 13, the air inlet into the first drying tower 11 and the second drying tower 12 can be controlled. A blowdown valve 17 is arranged between the first drying tower 11 and the second drying tower 12, and the blowdown valve 17 is in communication with the first drying tower 11 and the second drying tower 12, and the sewage in the first drying tower 11 and the second drying tower 12 is discharged through the blowdown valve 17. An air outlet check valve 14 is further arranged between the first drying tower 11 and the second drying tower 12, the air outlet check valve 14 is arranged at the upper part of the first drying tower 11 and the second drying tower 12, a flow reversing hole 18 is formed in the air outlet check valve 14, and the two ends of the flow reversing hole 18 are in communication with the first drying tower 11 and the second drying tower 12.

[0037] The first drying tower 11 and the second drying tower 12 are internally provided with a drying cavity 15, a partition plate 16 is welded and fixed to the inner side wall of the drying cavity 15, and the partition plate 16 is used for bearing a molecular sieve bag containing an adsorbent.

[0038] The implementation principle of the embodiment 1 of the double-tower air drying device is as follows: when the saturated wet air enters the drying device through the opened valve and enters a drying tower, the large water droplets, oil droplets and dust are removed through the high-efficiency centrifugal oil-water separator in the drying tower, and then the water is absorbed through the adsorbent, and the dried air in the drying tower opens the outlet check valve 14 by means of pressure; when the regeneration state of the drying tower reaches the set time, the electric control stops supplying power to the valve, at this time, the two electromagnetic valves are in a power-off state, and the two blowdown openings of the blowdown valve 17 are also in a closed state. Therefore, one drying tower continues to dry while the other drying tower stops regeneration. Part of the dried air is still continuously filled into the drying tower, and the drying tower with filled air gradually increases the pressure, and the drying tower is in the "charging state" (pressure increasing) during this period, that is, flexible conversion can be achieved, and then the electric control starts to supply power to the valve. At this time, the drying and regeneration of the two drying towers are converted with each other. The dried air is sent to the total air cylinder, the left and right air inlet chambers of the outlet check valve 14 are connected through the commutation hole 18, a part of the dried air treated by one drying tower flows to the other drying tower through the small hole, and the dried air is blown from the upper part of the other drying tower to the adsorbent, absorbs the water in the adsorbent (regeneration), and carries the water droplets, oil droplets and dust at the lower part of the centrifugal oil-water separator out of the blowdown valve 17.

[0039] Embodiment 2

[0040] With reference to Figure 1 and Figure 2 , the middle part of the refueling support 2 is rotationally connected with a refueling connecting rod 21 through a rotating shaft, and the refueling connecting rod 21 is provided in pairs. The refueling connecting rod 21 comprises a connecting rod 24 and a positioning rod 25. The connecting rod 24 is rotationally connected with the refueling support 2, and the positioning rod 25 is rotationally connected with the connecting rod 24 through a rotating shaft at one end close to the drying tower, and the positioning rod 25 is an L-shaped rod. A material taking mechanism 26 and a refueling box 27 are arranged on the positioning rod 25. The material taking mechanism 26 and the refueling box 27 are arranged in an up-down manner, and the material taking mechanism 26 is located above the refueling box 27. A lifting mechanism 28 is arranged on the side wall of the positioning rod 25, and the lifting mechanism 28 is located on the side of the material taking mechanism 26 close to the positioning rod 25. The lifting mechanism 28 is used to control the lifting or lowering of the material taking mechanism 26 and the refueling box 27, so as to take out or replace the drying part 3 from the drying tower by the material taking mechanism 26.

[0041] With reference to Figure 2 , Figure 3 and Figure 4The lifting mechanism 28 comprises a lifting plate 281, a lifting gear 282, an engaging plate strip 283 and a lifting motor 284. The positioning rod 25 is provided with an engaging tooth 285 on the side wall close to the material taking mechanism 26. The lifting plate 281 is a square plate and hollow inside. The positioning rod 25 is inserted into the lifting plate 281 at the end close to the engaging tooth 285. The side wall of the positioning rod 25 away from the engaging tooth 285 is attached to the inner side wall of the lifting plate 281. The lifting gear 282 is located inside the lifting plate 281 and engaged with the engaging tooth 285. The engaging plate strip 283 is located on the side of the lifting gear 282 away from the engaging tooth 285 and engaged with the lifting gear 282. The engaging plate strip 283 is inserted into the lifting plate 281, and the side wall of the engaging plate strip 283 away from the lifting gear 282 is attached to the inner side wall of the lifting plate 281. The lifting motor 284 is fixedly installed on the side wall of the lifting plate 281 through a flange, and the output end of the lifting motor 284 is arranged to extend into the lifting plate 281. The material replacing box 27 and the material taking mechanism 26 are located at the end of the engaging plate strip 283. When the lifting motor 284 drives the lifting gear 282 to rotate, the engaging plate strip 283 drives the material replacing box 27 and the material taking mechanism 26 to move up and down.

[0042] With reference to Figure 3 The first drying tower 11 and the second drying tower 12 are provided with a material replacing groove 23 on the side wall close to the positioning rod 25, and the drying part 3 is replaced through the material replacing groove 23. The material taking mechanism 26 is a material taking plate, which is fixedly welded with the side wall of the engaging plate strip 283. When the positioning rod 25 is rotated to be flush with the first drying tower 11 or the second drying tower 12, the material taking plate is arranged vertically with the side wall of the first drying tower 11. The bottom wall of the first drying tower 11 and the second drying tower 12 is provided with a sealing plate 35, and a sliding mechanism is arranged above the sealing plate 35, which is used to move the drying part 3 out of the drying cavity 15. The sliding mechanism comprises a driving motor and a driving gear. The driving cavity 15 is provided with a driving groove on the bottom wall, the driving gear is inserted into the driving groove, the driving motor is fixedly installed on one side of the driving gear and is used to control the rotation of the driving gear. The side wall of the driving gear is provided with a friction pattern, and the bottom wall of the drying part is provided with the engaging plate strip 283, so that the side wall of the driving gear is engaged with the side wall of the engaging plate strip 283, so that when the driving gear rotates, the drying part 3 starts to move under the action of friction and is pushed onto the material taking mechanism 26.

[0043] With reference to Figure 3The inside of the refilling box 27 is hollow, and the two sides of the refilling box 27 are grooved, the refilling box 27 is inserted with a refilling plate 22, the number of the refilling plate 22 is consistent with that of the partition plate 16, and each refilling plate 22 is fixedly connected. Each refilling plate 22 is placed with corresponding adsorbent, and the adsorbent placed on the refilling plate 22 is consistent with the reagent placed on the partition plate 16, so that the refilling plate 22 fixedly connected can be put into the drying part 3 in the first drying tower 11 and the second drying tower 12 as a whole to complete the replacement of the partition plate 16 and the corresponding adsorbent in the drying part 3. The bottom wall and the side wall of the refilling box 27 are welded with a pushing block 37, the top wall of the pushing block 37 is fixedly connected with a pushing cylinder 38 through a bolt, the output end of the pushing cylinder 38 is in abutment with the side wall of the refilling plate 22 at the bottom of the refilling box 27, so that the pushing cylinder 38 can push the refilling plate 22 into the first drying tower 11 and the second drying tower 12, thereby realizing the replacement of the adsorbent.

[0044] Referring to Figure 2 The side wall of the refilling box 27 close to the first drying tower 11 is embedded with a positioning magnet 39, the positioning magnet 39 is provided with four, and the four positioning magnets 39 are respectively located at the corners of the refilling box 27, the side wall of the first drying tower 11 and the second drying tower 12 close to the refilling box 27 is provided with a matching magnet 391, and the matching magnet 391 is arranged at the corresponding position of the first drying tower 11 and the second drying tower 12 and the refilling box 27, so that when the adsorbent is replaced, the positioning magnet 39 and the matching magnet 391 are adsorbed, thereby improving the stability of the whole when the adsorbent is replaced.

[0045] The implementation principle of the embodiment 2 of the double-tower air drying device of the embodiment of the present application is that: when the air drying device in the present application is in use, when the adsorbent needs to be replaced after being used for a long time, the operator first opens the refilling groove 23, then rotates the refilling connecting rod 21, so that the positioning rod 25 is rotated to the first drying tower 11 and the second drying tower 12. Start the lifting motor 284, so that the lifting motor 284 drives the lifting gear 282 to rotate, so that the lifting gear 282 drives the meshing plate strip 283 to rotate, thereby driving the refilling box 27 and the material taking mechanism 26 to move up and down. When the material taking mechanism 26 moves to be parallel to the bottom wall of the refilling groove 23, the driving motor controls the driving gear to rotate, thereby driving the drying part 3 to slide out of the drying cavity 15 and slide onto the material taking mechanism 26. Then, the lifting gear 282 rotates again, and rotates to the bottom wall of the refilling box 27 and the refilling groove 23. At this time, the positioning magnet 39 and the matching magnet 391 are adsorbed, and at the same time, the pushing cylinder 38 pushes the refilling plate 22 into the drying cavity 15, thereby completing the replacement of the adsorbent.

[0046] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, so: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A two-tower air drying device, characterized by: Including first drying tower (11) and second drying tower (12), be provided with air inlet reversing valve (13) between first drying tower (11) and second drying tower (12), be provided with air outlet check valve (14) between first drying tower (11) and second drying tower (12), air outlet check valve (14) is communicated with first drying tower (11) and second drying tower (12) and is arranged;The drying cavity (15) is opened in first drying tower (11) and second drying tower (12), the partition plate (16) is arranged in drying cavity (15), the partition plate (16) is provided with a functional bag, the partition plate (16) is provided with several, the functional bag is molecular sieve bag, the functional bag is used to place dry adsorbent, be provided with blowdown valve (17) between first drying tower (11) and second drying tower (12), blowdown valve (17) is communicated with first drying tower (11) and second drying tower (12) and is arranged through a valve; The outside of first drying tower (11) and second drying tower (12) is provided with a material changing support (2), a material changing connecting rod (21) is rotatably connected to the sidewall of the material changing support (2); The material changing connecting rod (21) includes a connecting rod (24) and a positioning rod (25), the connecting rod (24) is rotatably connected to the material changing support (2), the positioning rod (25) is arranged at one end of the connecting rod (24) away from the material changing support (2), and the positioning rod (25) is rotatably connected to the connecting rod (24). The side wall of the positioning rod (25) is provided with a lifting mechanism (28), the lifting mechanism (28) comprises a lifting plate (281), a lifting gear (282), an engagement plate (283) and a lifting motor (284), the side wall of the positioning rod (25) is provided with an engagement tooth (285), the lifting plate (281) is hollow, the engagement tooth (285) is inserted into the lifting plate (281), the lifting gear (282) is located on one side of the engagement tooth (285), the lifting gear (282) is located in the lifting plate (281), the positioning rod (25) is in abutment with the inner side wall of the lifting plate (281), the engagement plate (283) is located in the lifting plate (281), the engagement plate (283) is in engagement with the lifting gear (282), the engagement plate (283) is in abutment with the inner side wall of the lifting plate (281), the lifting motor (284) is arranged on the lifting plate (281), the lifting motor (284) is used for driving the lifting gear (282) to rotate, the material taking mechanism (26) and the material changing box (27) are arranged on the engagement plate (283), the material changing box (27) is located below the material taking mechanism (26), the material changing box (27) is provided with a material changing plate (22), the first drying tower (11) and the second drying tower (12) are provided with a material changing groove (23) on the side wall close to the material changing plate (22), the material changing groove (23) is in communication with the drying cavity (15), and the material changing plate (22) is inserted into the material changing groove (23) by rotating the material changing connecting rod (21).

2. A dual-tower current commutated air drying device according to claim 1, characterized in that: The air outlet check valve (14) is provided with a commutation hole (18), and the commutation hole (18) is in communication with the first drying tower (11) and the second drying tower (12) respectively.

3. A dual-tower, air-to-refrigerant heat exchanger as set forth in claim 1 wherein: The drying cavity (15) is provided with a drying part (3), the inner side wall of the drying part (3) is connected with the partition plate (16), the first drying tower (11) and the second drying tower (12) are provided with a sliding mechanism, the sliding mechanism comprises a driving motor and a driving gear, the driving motor is arranged on the side wall of the first drying tower (11), the driving gear is arranged on the output end of the driving motor, the bottom wall of the drying cavity (15) is provided with a driving groove, the driving gear is located in the driving groove, and the bottom wall of the drying part (3) is provided with an engagement rack.

4. A dual-tower current commutated air drying device according to claim 3, characterized in that: The bottom wall of the first drying tower (11) and the second drying tower (12) is provided with a sealing plate (35), the sealing plate (35) is connected with the bottom wall of the drying part (3), and the driving gear and the driving motor are arranged on one side of the sealing plate (35) close to the drying part (3).

5. A dual-tower, air-to-refrigerant heat exchanger as set forth in claim 1, wherein: The material replacing box (27) is internally provided with a plurality of material replacing plates (22), the number of the plurality of material replacing plates (22) is consistent with the number of the partition plates (16) in the first drying tower (11) or the second drying tower (12), the side wall of the material replacing box (27) is provided with a pushing block (37), the top wall of the pushing block (37) is provided with a pushing cylinder (38), the pushing cylinder (38) is arranged towards the material replacing plate (22), and the pushing cylinder (38) is used for pushing the material replacing plate (22) into the drying cavity (15).

6. A dual-tower, air-to-refrigerant heat exchanger as set forth in claim 1, wherein: The side wall of the material replacing box (27) is provided with a positioning magnet (39), the side wall of the first drying tower (11) or the second drying tower (12) close to the material replacing box (27) is provided with a connecting magnet (391), and the positioning magnet (39) and the connecting magnet (391) are magnetically attracted.

7. A twin-tower, air-to-refrigerant heat exchanger as claimed in claim 6, wherein: The positioning magnet (39) is provided with four positioning magnets (39) arranged at the side wall corners of the material replacing box (27), and the connecting magnet (391) is correspondingly arranged on the side wall of the first drying tower (11) or the second drying tower (12) close to the positioning magnet (39).

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