Automobile body air drying system

Abstract

The utility model relates to the technical field of air drying equipment, in particular to an automobile body air drying system which comprises a left air knife, a right air knife, a first top frame, a first upper air knife, a first air blower, a second air blower and a third air blower. The first frequency converter is electrically connected with the first air blower, the second frequency converter is electrically connected with the second air blower, and the third frequency converter is electrically connected with the third air blower; the left air knife, the right air knife, the first top frame or the first upper air knife are provided with a first proximity sensor used for detecting a vehicle, and the first frequency converter, the second frequency converter and the third frequency converter are all electrically connected with the first proximity sensor. The air blower overcomes the defects that in the prior art, a fan always keeps a high-frequency operation state, and unnecessary energy waste is caused when no vehicle passes by, the operation frequency of the air blower can be adjusted according to whether the vehicle passes by or not, and energy conservation and consumption reduction are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of air-drying equipment, and more specifically, to an automobile body air-drying system. Background Art

[0002] Car air-drying equipment is used to air-dry the surface of the car body. After the car has passed the rain sealing test, the car body needs to be air-dried using the car air-drying equipment.

[0003] The prior art discloses a car washing machine air drying device, which includes a movable truss that can move back and forth laterally, and also includes an air drying device composed of two upright frames and a horizontal frame located between the two upright frames, the air drying device is fixedly connected to the movable truss and moves with it, the two ends of the horizontal frame are respectively connected to the two upright frames through blocking plates, the upright frames and the horizontal frames have air flow cavities inside, the upright frames are each provided with a fan 1, the blowing nozzle of the fan 1 faces the inside of the upright frame and can blow air to the inside of the upright frame, and the horizontal frame is provided with a fan 2 on the left and right, the blowing nozzle of the fan 2 faces the inside of the horizontal frame and can blow air to the inside of the horizontal frame. During implementation, the fan 1 in the upright frame and the fan 2 in the horizontal frame are started at the same time, and air is blown through the blowing nozzles of the upright frame 1 and the blowing nozzles of the upright frame 2, and the vehicle is driven to pass under the horizontal frame to be air dried.

[0004] However, in the above technical solution, fans 1 and 2 are always kept in the started state, and regardless of whether there are vehicles approaching or not, fans 1 and 2 are always blowing at a high frequency, which will cause unnecessary energy waste when no vehicles pass by. Utility Model Content

[0005] In view of the problem in the above-mentioned prior art that the fan always maintains a high-frequency operation state, which will cause unnecessary energy waste when no vehicle passes by, the utility model provides a car body drying device, in which the fan can be switched to a low-frequency operation state when no vehicle passes by, which is beneficial to energy saving.

[0006] In order to solve the above technical problems, the technical solution provided by the utility model is:

[0007] A car body air drying system, comprising a left air knife, a right air knife, a first top frame, a first upper air knife connected to the first top frame, a first blower, a second blower and a third blower, wherein the two ends of the first top frame are respectively connected to the left air knife and the right air knife; the air outlet of the first blower is connected to the air inlet of the left air knife, the air outlet of the second blower is connected to the air inlet of the right air knife, and the air outlet of the third blower is connected to the air inlet of the first upper air knife; the left air knife, the right air knife and the first upper A traffic cavity is formed between the wind blades for vehicles to pass through; it also includes a first frequency converter, a second frequency converter and a third frequency converter, the first frequency converter is electrically connected to the first blower, the second frequency converter is electrically connected to the second blower, and the third frequency converter is electrically connected to the third blower; a first proximity sensor for detecting vehicles is provided on the left wind blade, the right wind blade, the first top frame or the first upper wind blade, and the first frequency converter, the second frequency converter and the third frequency converter are all electrically connected to the first proximity sensor.

[0008] In the above technical solution, in the initial state, the first blower, the second blower and the third blower are all in a low-frequency operation state. When a car passes through the traffic cavity, the first proximity sensor can detect the presence of the car and send signals to the first frequency converter, the second frequency converter and the third frequency converter respectively, and the first frequency converter, the second frequency converter and the third frequency converter respectively increase the input frequency and voltage of the first blower, the second blower and the third blower, thereby increasing the air volume and air speed of the first blower, the second blower and the third blower; when the car leaves the traffic cavity, that is, leaves the detection range of the first proximity sensor, the first proximity sensor cannot detect the presence of the car, and then sends signals to the first frequency converter, the second frequency converter and the third frequency converter respectively, and the first frequency converter, the second frequency converter and the third frequency converter respectively reduce the input frequency and voltage of the first blower, the second blower and the third blower, thereby reducing the air volume and air speed of the first blower, the second blower and the third blower. That is to say, when a car passes through the traffic cavity, the first blower, the second blower and the third blower reach a high-frequency operation state, and when the car leaves the traffic cavity, the first blower, the second blower and the third blower switch to a low-frequency operation state, thereby achieving the purpose of energy saving and consumption reduction.

[0009] It should be noted that the blower and the air knife are both existing technologies, so their structures are not described in detail.

[0010] Preferably, the first top frame is provided with a mounting assembly for connecting to the ceiling. The first top frame can be fixed to the ceiling by the mounting assembly, which can improve the stability of the first top frame. The connection between the mounting assembly and the ceiling can be threaded, clamped, screwed, or connected by other connectors.

[0011] Preferably, the first top frame is provided with a first opening and an airflow cavity connected to the first opening, and the air outlet of the third blower is connected to the first opening; the inner cavity of the first upper air knife is connected to the airflow cavity. The wind blown out of the air outlet of the third blower enters the airflow cavity through the opening, then enters the inner cavity of the first upper air knife through the airflow cavity, and finally blows out from the air outlet of the first upper air knife. Since the third blower is arranged on the first top frame, the air outlet of the third blower is connected to the first top frame instead of the first upper air knife, so there is no need to connect an external air pipe to the air outlet of the third blower to the first upper air knife, which is conducive to simplifying the structure of the air-drying system.

[0012] Preferably, the two ends of the first top frame are provided with a second opening and a third opening both connected to the airflow cavity; the top of the left air knife is provided with a fourth opening connected to its own inner cavity, and the fourth opening is connected to the second opening; the top of the right air knife is provided with a fifth opening connected to its own inner cavity, and the fifth opening is connected to the third opening. In other words, the airflow cavity, the inner cavity of the left air knife and the inner cavity of the right air knife are interconnected, so that the air pressure of the inner cavity of the first upper air knife, the inner cavity of the left air knife and the inner cavity of the right air knife can be more uniform, so that the air output volume and air output speed of the first upper air knife, the left air knife and the right air knife are more consistent, so that the car body can be dried more evenly.

[0013] Preferably, it also includes a first soft cloth ring and a second soft cloth ring, wherein the edge of one end of the first soft cloth ring fits with the edge of the second opening, and the edge of the other end fits with the edge of the fourth opening, that is, the second opening is connected to the fourth opening through the first soft cloth ring; the edge of one end of the second soft cloth ring fits with the edge of the third opening, and the edge of the other end fits with the edge of the fifth opening, that is, the third opening is connected to the fifth opening through the second soft cloth ring. Both the first soft cloth ring and the second soft cloth ring can be deformed, so that the left wind knife and the right wind knife can be moved horizontally relative to the first top frame, so that when air-drying cars of different widths, the width of the passage cavity can be changed by horizontally moving the left wind knife and the right wind knife, thereby meeting the air-drying requirements of cars of different widths.

[0014] Preferably, it also includes a fourth blower, a second top frame connected to the first top frame, a lifting drive mechanism, a telescopic tube that can be extended and retracted in the vertical direction, and a second upper wind blade; the fourth blower is arranged on the first top frame, and the air outlet of the fourth blower is connected to the air inlet of the second upper wind blade through the telescopic tube; the lifting drive mechanism is arranged on the second top frame to drive the second upper wind blade to rise and fall. The wind blown out by the fourth blower is blown to the inner cavity of the second upper wind blade through the telescopic tube, and then blown out through the air outlet of the second upper wind blade. The top surface of the automobile body has a certain height change rather than a plane. When the car passes under the second upper wind blade, the lifting drive mechanism can drive the second upper wind blade to rise and fall, and the telescopic tube is extended and retracted as the second upper wind blade rises and falls, so that the air outlet of the second upper wind blade maintains a vertical distance of 12 cm from the top surface of the automobile body, thereby further drying the top surface of the automobile body, which is conducive to improving the drying efficiency of the automobile body.

[0015] It should be noted that one or more of the first blower, the second blower, the third blower and the fourth blower can be respectively provided according to actual needs.

[0016] Preferably, it further comprises a fourth frequency converter, and the fourth blower is electrically connected to the fourth frequency converter; the second top frame or the second upper wind blade is provided with a second proximity sensor for detecting a car, and the second proximity sensor is electrically connected to the fourth frequency converter. When the second proximity sensor detects a car, it sends a signal to the fourth frequency converter, and the fourth frequency converter controls the change of the input frequency and voltage of the fourth blower to keep the fourth blower in a high-frequency blowing state. When the car drives out of the detection range of the second proximity sensor, the fourth frequency converter controls the reduction of the input frequency and voltage of the fourth blower to keep the fourth blower in a low-frequency blowing state.

[0017] Preferably, an oblique channel is provided at the air outlet of the second upper air blade, and the oblique channel extends obliquely in the direction where the through cavity is located, and an acute angle is formed between the extension direction of the oblique channel and the axis of the telescopic tube. The oblique channel can change the air outlet direction of the second upper air blade, and can reduce the flow resistance of the wind blown by the second upper air blade in the horizontal direction, thereby reducing the resistance of the wind blown by the second upper air blade to flow horizontally on the top surface of the automobile body, which is conducive to reducing water accumulation on the top surface of the automobile body and improving the air drying effect and air drying efficiency of the top surface of the automobile body.

[0018] Preferably, the extending direction of the oblique channel forms an angle of 10° to 60° with the axis of the telescopic tube, which can ensure that the wind blown by the second upper wind knife can smoothly hit the top surface of the automobile body, while ensuring that the wind has a higher flow rate on the top surface of the automobile body.

[0019] Preferably, a contact sensor is provided at the bottom of the second upper air knife, and the contact sensor is electrically connected to the lifting drive mechanism. When the contact sensor touches the top surface of the automobile body, a signal is sent to the lifting drive mechanism, and the lifting drive mechanism then drives the second upper air knife to rise, so as to avoid the second upper air knife from colliding with the top surface of the automobile body.

[0020] The beneficial effects of the utility model include: a proximity sensor, a first frequency converter, a second frequency converter and a third frequency converter are provided, the proximity sensor is used to detect a car, when no car enters the detection range of the proximity sensor, the first frequency converter, the second frequency converter and the third frequency converter can respectively reduce the input frequency and voltage of the first blower, the second blower and the third blower, so that the first blower, the second blower and the third blower are switched to a low-frequency operation state, which is beneficial to energy saving and consumption saving; a second upper wind knife and a lifting drive mechanism are provided, and the lifting drive mechanism is used to drive the second upper wind knife and the third blower The second upper wind knife rises and falls with the change of the shape of the top surface of the automobile body, so that the air outlet of the second upper wind knife can maintain a certain distance from the top surface of the automobile body, which is beneficial to improving the air drying efficiency of the automobile body; an oblique channel is provided at the air outlet of the second upper wind knife to change the air outlet direction of the second upper wind knife, which can reduce the flow resistance of the wind blown by the second upper wind knife in the horizontal direction, thereby reducing the resistance of the wind blown by the second upper wind knife to horizontal flow on the top surface of the automobile body, which is beneficial to reducing water accumulation on the top surface of the automobile body and improving the air drying effect and air drying efficiency of the top surface of the automobile body. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of embodiment 1 or embodiment 2 of an automobile body air drying system;

[0022] Figure 2 It is a schematic diagram of the left wind knife, the first top frame and the right wind knife in a separated state;

[0023] Figure 3 is a schematic structural diagram of a third embodiment of an automobile body air-drying system;

[0024] Figure 4 It is a structural schematic diagram of the oblique channel;

[0025] Figure 5 This is a schematic diagram of the arrangement of the proximity sensor on the fourth wind knife.

[0026] In the accompanying drawings: 1-left wind knife; 101-fourth opening; 2-right wind knife; 201-fifth opening; 3-first top frame; 301-traffic cavity; 302-first opening; 303-second opening; 304-third opening; 4-first upper wind knife; 5-first blower; 6-second blower; 7-third blower; 8-first proximity sensor; 9-installation assembly; 10-first soft cloth ring; 11-second soft cloth ring; 12-fourth blower; 13-second top frame; 14-telescopic tube; 15-second upper wind knife; 1501-oblique channel; 16-contact sensor. DETAILED DESCRIPTION

[0027] The drawings are only for illustrative purposes and cannot be construed as limiting the present invention. To better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are only for illustrative purposes and cannot be construed as limiting the present invention.

[0028] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "long", "short" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0029] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0030] Example 1

[0031] like Figure 1The automobile body air drying system shown in the figure comprises a left air knife 1, a right air knife 2, a first top frame 3, a first upper air knife 4 connected to the first top frame 3, a first blower 5, a second blower 6 and a third blower 7, the two ends of the first top frame 3 are respectively connected to the left air knife 1 and the right air knife 2; the air outlet of the first blower 5 is connected to the air inlet of the left air knife 1, the air outlet of the second blower 6 is connected to the air inlet of the right air knife 2, and the air outlet of the third blower 7 is connected to the air inlet of the first upper air knife 4; the left air knife 1, the right air knife 2 A traffic cavity 301 for vehicles to pass through is formed between the first upper wind blade 4; it also includes a first frequency converter (not shown in the figure), a second frequency converter (not shown in the figure) and a third frequency converter (not shown in the figure), the first frequency converter is electrically connected to the first blower 5, the second frequency converter is electrically connected to the second blower 6, and the third frequency converter is electrically connected to the third blower 7; a first proximity sensor 8 for detecting vehicles is provided on the left wind blade 1, and the first frequency converter, the second frequency converter and the third frequency converter are all electrically connected to the first proximity sensor 8.

[0032] The working principle or working process of this embodiment: in the initial state, the first blower 5, the second blower 6 and the third blower 7 are all in a low-frequency operation state. When a car passes through the traffic cavity 301, the first proximity sensor 8 can detect the car and send signals to the first frequency converter, the second frequency converter and the third frequency converter respectively. The first frequency converter, the second frequency converter and the third frequency converter respectively increase the input frequency and voltage of the first blower 5, the second blower 6 and the third blower 7, thereby increasing the air volume and air speed of the first blower 5, the second blower 6 and the third blower 7; when the car leaves the traffic cavity 301, that is, leaves the detection range of the first proximity sensor 8, the first proximity sensor 8 cannot detect the existence of the car, and then sends signals to the first frequency converter, the second frequency converter and the third frequency converter respectively. The first frequency converter, the second frequency converter and the third frequency converter respectively reduce the input frequency and voltage of the first blower 5, the second blower 6 and the third blower 7, thereby reducing the air volume and air speed of the first blower 5, the second blower 6 and the third blower 7. That is to say, when the car passes through the traffic cavity 301, the first blower 5, the second blower 6 and the third blower 7 reach a high-frequency operation state, and when the car leaves the traffic cavity 301, the first blower 5, the second blower 6 and the third blower 7 switch to a low-frequency operation state, thereby achieving the purpose of energy saving and consumption reduction.

[0033] Beneficial effects of this embodiment: a proximity sensor, a first frequency converter, a second frequency converter and a third frequency converter are provided, the proximity sensor is used to detect cars, when no car enters the detection range of the proximity sensor, the first frequency converter, the second frequency converter and the third frequency converter can respectively reduce the input frequency and voltage of the first blower, the second blower and the third blower, thereby switching the first blower, the second blower and the third blower to a low-frequency operation state, which is beneficial to energy saving and consumption saving.

[0034] Example 2

[0035] This embodiment is based on the embodiment 1, combined with Figure 1 and Figure 2 As shown, a mounting assembly 9 for connecting to the ceiling is provided on the first top frame 3. The first top frame 3 can be fixed to the ceiling by the mounting assembly 9, which can improve the stability of the first top frame 3. The connection between the mounting assembly 9 and the ceiling can be threaded, clamped, fastened by screws, or connected by other connecting parts.

[0036] Furthermore, a first opening 302 is provided on the first top frame 3, and an airflow cavity (not shown in the figure) connected to the first opening 302 is provided inside the first top frame 3, and the air outlet of the third blower 7 is connected to the first opening 302; the inner cavity of the first upper air knife 4 is connected to the airflow cavity. The wind blown out of the air outlet of the third blower 7 enters the airflow cavity through the opening, then enters the inner cavity of the first upper air knife 4 through the airflow cavity, and finally blows out from the air outlet of the first upper air knife 4. Since the third blower 7 is arranged on the first top frame 3, the air outlet of the third blower 7 is connected to the first top frame 3 instead of the first upper air knife 4, so there is no need to connect an external air pipe to the air outlet of the third blower 7 to the first upper air knife 4, which is conducive to simplifying the structure of the air-drying system.

[0037] Furthermore, the two ends of the first top frame 3 are provided with a second opening 303 and a third opening 304 both connected to the airflow cavity; the top of the left air knife 1 is provided with a fourth opening 101 connected to its own inner cavity, and the fourth opening 101 is connected to the second opening 303; the top of the right air knife 2 is provided with a fifth opening 201 connected to its own inner cavity, and the fifth opening 201 is connected to the third opening 304. In other words, the airflow cavity, the inner cavity of the left air knife 1 and the inner cavity of the right air knife 2 are interconnected, so that the air pressure of the inner cavity of the first upper air knife 4, the inner cavity of the left air knife 1 and the inner cavity of the right air knife 2 can be more uniform, so that the air volume and air speed of the first upper air knife 4, the left air knife 1 and the right air knife 2 are more consistent, so that the car body can be dried more evenly.

[0038] Furthermore, it also includes a first soft cloth ring 10 and a second soft cloth ring 11, one end edge of the first soft cloth ring 10 is in contact with the edge of the second opening 303, and the other end edge is in contact with the edge of the fourth opening 101, that is, the second opening 303 is connected to the fourth opening 101 through the first soft cloth ring 10; one end edge of the second soft cloth ring 11 is in contact with the edge of the third opening 304, and the other end edge is in contact with the edge of the fifth opening 201, that is, the third opening 304 is connected to the fifth opening 201 through the second soft cloth ring 11. The first soft cloth ring 10 and the second soft cloth ring 11 can both be deformed, so that the left wind knife 1 and the right wind knife 2 can both be horizontally moved relative to the first top frame 3, so that when air-drying cars of different widths, the width of the through cavity 301 can be changed by horizontally moving the left wind knife 1 and the right wind knife 2, thereby meeting the air-drying requirements of cars of different widths.

[0039] Other features, working principles and beneficial effects of this embodiment are consistent with those of Embodiment 1.

[0040] Example 3

[0041] This embodiment is based on the embodiment 2, combined with Figures 1 to 5 As shown, the air drying system further includes a fourth blower 12, a second top frame 13 connected to the first top frame 3, a lifting drive mechanism, a telescopic tube 14 that can be extended and retracted in the vertical direction, and a second upper air knife 15; the fourth blower 12 is arranged on the first top frame 3, and the air outlet of the fourth blower 12 is connected to the air inlet of the second upper air knife 15 through the telescopic tube 14; the lifting drive mechanism is arranged on the second top frame 13 to drive the second upper air knife 15 to rise and fall. The air blown out by the fourth blower 12 is blown to the inner cavity of the second upper air knife 15 through the telescopic tube 14, and then blown out through the air outlet of the second upper air knife 15. The top surface of the car body has a certain height change rather than being a flat surface. When the car passes under the second upper wind knife 15, the lifting drive mechanism can drive the second upper wind knife 15 to rise and fall, and the telescopic tube 14 is extended and retracted as the second upper wind knife 15 rises and falls, so that the air outlet of the second upper wind knife 15 maintains a vertical distance of 12 cm from the top surface of the car body, thereby further drying the top surface of the car body, which is beneficial to improving the drying efficiency of the car body.

[0042] Furthermore, it also includes a fourth frequency converter, and the fourth blower 12 is electrically connected to the fourth frequency converter; the second upper wind blade 15 is provided with a second proximity sensor (not shown in the figure) for detecting a car, and the second proximity sensor is electrically connected to the fourth frequency converter. When the second proximity sensor detects a car, it sends a signal to the fourth frequency converter, and the fourth frequency converter controls the change of the input frequency and voltage of the fourth blower 12, so that the fourth blower 12 maintains a high-frequency blowing state. When the car drives out of the detection range of the second proximity sensor, the fourth frequency converter controls the reduction of the input frequency and voltage of the fourth blower 12, so that the fourth blower 12 maintains a low-frequency blowing state.

[0043] Furthermore, an oblique channel 1501 is provided at the air outlet of the second upper air blade 15, and the oblique channel 1501 extends obliquely in the direction of the through cavity 301, and an acute angle is formed between the extending direction of the oblique channel 1501 and the axis of the telescopic tube 14. The oblique channel 1501 can change the air outlet direction of the second upper air blade 15, and can reduce the flow resistance of the wind blown by the second upper air blade 15 in the horizontal direction, thereby reducing the resistance of the wind blown by the second upper air blade 15 to flow horizontally on the top surface of the automobile body, which is conducive to reducing the accumulation of water on the top surface of the automobile body and improving the air drying effect and air drying efficiency of the top surface of the automobile body.

[0044] Specifically, the extending direction of the oblique channel 1501 forms an angle of 10° to 60° with the axis of the telescopic tube 14, which ensures that the wind blown by the second upper wind blade 15 can smoothly hit the top surface of the car body, while ensuring that the wind has a high flow rate on the top surface of the car body. It should be noted that when the oblique channel 1501 extends in the vertical direction, the extending direction of the oblique channel 1501 forms an angle of 0° with the axis of the telescopic tube 14, and when the oblique channel 1501 extends in the horizontal direction, the extending direction of the oblique channel 1501 forms an angle of 90° with the axis of the telescopic tube 14.

[0045] Furthermore, a plurality of linearly distributed contact sensors 16 are provided at the bottom of the second upper air blade 15, and the contact sensors 16 are all electrically connected to the lifting drive mechanism. When the contact sensor 16 touches the top surface of the automobile body, a signal is sent to the lifting drive mechanism, and the lifting drive mechanism then drives the second upper air blade 15 to rise, so as to avoid the second upper air blade 15 from colliding with the top surface of the automobile body.

[0046] The other features, working principles and beneficial effects of this embodiment are consistent with those of Embodiment 2.

[0047] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description, and it is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A car body air drying system, comprising a left wind knife (1), a right wind knife (2), a first top frame (3), a first upper wind knife (4) connected to the first top frame (3), a first blower (5), a second blower (6) and a third blower (7), wherein the two ends of the first top frame (3) are respectively connected to the left wind knife (1) and the right wind knife (2); the air outlet of the first blower (5) is connected to the air inlet of the left wind knife (1), the air outlet of the second blower (6) is connected to the air inlet of the right wind knife (2), and the air outlet of the third blower (7) is connected to the air inlet of the first upper wind knife (4); a traffic cavity (301) for vehicles to pass through is formed between the left wind knife (1), the right wind knife (2) and the first upper wind knife (4); characterized in that, The invention also comprises a first frequency converter, a second frequency converter and a third frequency converter, wherein the first frequency converter is electrically connected to the first blower (5), the second frequency converter is electrically connected to the second blower (6), and the third frequency converter is electrically connected to the third blower (7); a first proximity sensor (8) for detecting a vehicle is provided on the left wind knife (1), the right wind knife (2), the first top frame (3) or the first upper wind knife (4), and the first frequency converter, the second frequency converter and the third frequency converter are all electrically connected to the first proximity sensor (8).

2. The automobile body air drying system according to claim 1, characterized in that: The first top frame (3) is provided with a mounting assembly () for connecting to the ceiling.

3. The automobile body air drying system according to claim 2, characterized in that: The first top frame (3) is provided with a first opening (302) and an airflow cavity connected to the first opening (302); the air outlet of the third blower (7) is connected to the first opening (302); and the inner cavity of the first upper air knife (4) is connected to the airflow cavity.

4. The automobile body air drying system according to claim 3, characterized in that: The two ends of the first top frame (3) are provided with a second opening (303) and a third opening (304) both of which are connected to the airflow cavity; the top of the left wind knife (1) is provided with a fourth opening (101) connected to its own inner cavity, and the fourth opening (101) is connected to the second opening (303); the top of the right wind knife (2) is provided with a fifth opening (201) connected to its own inner cavity, and the fifth opening (201) is connected to the third opening (304).

5. The automobile body air drying system according to claim 4, characterized in that: It also comprises a first soft cloth ring (10) and a second soft cloth ring (11), wherein the edge of one end of the first soft cloth ring (10) is in contact with the edge of the second opening (303), and the edge of the other end is in contact with the edge of the fourth opening (101); the edge of one end of the second soft cloth ring (11) is in contact with the edge of the third opening (304), and the edge of the other end is in contact with the edge of the fifth opening (201).

6. An automobile body air drying system according to any one of claims 1 to 5, characterized in that: It also includes a fourth blower (12), a second top frame (13) connected to the first top frame (3), a lifting drive mechanism, a telescopic tube (14) that can be extended and retracted in the vertical direction, and a second upper wind knife (15); the fourth blower (12) is arranged on the first top frame (3), and the air outlet of the fourth blower (12) is connected to the air inlet of the second upper wind knife (15) through the telescopic tube (14); the lifting drive mechanism is arranged on the second top frame (13) and is used to drive the second upper wind knife (15) to rise and fall.

7. The automobile body air drying system according to claim 6, characterized in that: It also includes a fourth frequency converter, and the fourth blower (12) is electrically connected to the fourth frequency converter; the second top frame (13) or the second upper wind knife (15) is provided with a second proximity sensor for detecting the car, and the second proximity sensor is electrically connected to the fourth frequency converter.

8. The automobile body air drying system according to claim 6, characterized in that: An oblique channel (1501) is provided at the air outlet of the second upper wind knife (15), and the oblique channel (1501) extends obliquely in the direction of the traffic cavity (301), and an acute angle is formed between the extension direction of the oblique channel (1501) and the axis of the telescopic tube (14).

9. The automobile body air drying system according to claim 8, characterized in that: An angle of 10° to 60° is formed between the extension direction of the oblique channel (1501) and the axis of the telescopic tube (14).

10. The automobile body air drying system according to claim 6, characterized in that: A contact sensor (16) is provided at the bottom of the second upper air knife (15), and the contact sensor (16) is electrically connected to the lifting drive mechanism.

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