A wall-mounted air purifier

Abstract

The present invention relates to the technical field of air purification. The present application discloses a wall-mounted air purifier, comprising a shell, a diverter groove is provided on the bottom of the inner cavity of the shell and the back of the sealing cover at a position above the stroke device through casting, and a stroke device is provided on the top of the groove by placement. When the stroke device works for a long time, too much dust adheres to the surface, resulting in a decrease in the gas flow rate and an increase in resistance, thereby pushing the stroke device as a whole to move vertically upward. Since the diverter groove is provided on the bottom of the inner cavity of the shell and the back of the sealing cover at a position above the stroke device through casting, the airflow can continue to flow through the diverter groove, thereby avoiding the problem that the stroke device close to the silent turbofan is excessively blocked by dust, resulting in excessive resistance to the airflow, thereby improving the reliability of the device when the flow rate of a single filter plate is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of air purification, and in particular to a wall-mounted air purifier. Background Art

[0002] Air purifier is a very common household appliance that can filter and remove dust and some harmful substances in the air, greatly improving the residential environment. As people's needs change, a wall-mounted air purifier has been introduced, which greatly reduces the thickness and occupies a smaller space. Traditional wall-mounted air purifiers use multi-layer filtration to improve their purification effect due to the relatively narrow space. This type of air purifier has the advantages of simple structure, easy use and low cost, and is currently the most widely used method.

[0003] Although the existing wall-mounted air purifiers have many of the above-mentioned advantages, they still have certain limitations in actual use. After the air flow enters the air purifier, it will come into contact with the filter device near the air inlet, causing a large amount of dust to adhere to the surface of the filter device more quickly, resulting in a decrease in the air flow rate, thereby affecting the purification efficiency of the entire device. In this regard, this application document proposes a wall-mounted air purifier to solve the above-mentioned problems. Summary of the Invention

[0004] The present application proposes a wall-mounted air purifier, which has the advantage that when the airflow efficiency of the filter device near the air inlet is reduced due to dust adhesion, the airflow can bypass the diversion grooves on both sides, so as to solve the problem of reduced filtration efficiency caused by dust adhesion to the filter device.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solution: a wall-mounted air purifier, comprising a shell, a sealing cover is fixedly installed on the front side of the shell by bolt connection, a partition plate is fixedly installed on the bottom of the inner cavity of the shell near both sides by welding, the top of the partition plate is provided with a placement groove by cutting, the placement grooves are distributed in a linear array, the top of the placement groove is provided with a stroke device by placement, a silent turbofan is provided at a position near the bottom of the inner cavity of the shell through a bearing connecting sleeve, a power machine is fixedly installed on the back side of the sealing cover by bolt connection near the bottom, one end of the output shaft of the power machine cooperates with the silent turbofan, a dustproof air intake groove is provided at the front side of the sealing cover near the bottom, and the dustproof air intake groove corresponds to the power machine. The cam is provided with an air outlet on the front of the sealing cover near the top, and a guide channel is fixedly installed by welding at positions near both sides of the back of the shell. Guide holes are drilled on both sides of the bottom of the inner cavity of the sealing cover near the top, and a flow blocking device is fixedly installed by bolts at positions near the bottom of both sides of the partition plate. The bottom of the inner cavity of the shell is located at a position near the bottom of the inner side of the partition plate and an air inlet is drilled by a drilling machine. The guide hole and the air inlet are both connected to the guide channel, and a diversion groove is provided by casting at the bottom of the inner cavity of the shell and the back of the sealing cover at a position above the stroke device. A dust plug is provided at the bottom of the inner cavity of the shell through a matching sleeve through the shaft hole, and a pressure sensor is fixedly installed by welding at a position above the placement groove on the inner side of the partition plate.

[0006] Furthermore, the stroke device includes a connecting rod, the two ends of the connecting rod are fixedly installed with a stroke bar by means of bolt connection, the inner side of the stroke bar is provided with a stroke groove by cutting, one end of the stroke groove is fixedly installed with a servo motor by bolt connection, and one end of the servo motor output shaft is fixedly installed with a screw rod by bolt connection, the outer surface of the screw rod is provided with a threaded stroke block through a threaded fitting sleeve, the threaded stroke block is movably installed in the interior of the stroke groove, and one side of the threaded stroke block is fixedly installed with a stroke rod by clamping, and the top and bottom of the connecting rod are located at positions on both sides of the stroke groove and are respectively fixedly installed with an upper spoiler and a lower spoiler by welding, the outer surfaces of the connecting rod and the stroke rod are provided with a filtering device through an axial hole fitting a movable sleeve, and the top of the lower spoiler is fixedly installed with a spoiler by clamping.

[0007] Furthermore, the filtering device includes three sleeves, which are respectively sleeved on the outer surfaces of the connecting rod and the stroke rod. The outer surfaces of the sleeves are fixedly mounted with filter cloths by snap-fitting, and the sleeves are connected through the filter cloths.

[0008] Furthermore, the top of the upper spoiler is fixedly connected to the bottom of the pressure sensor via a spring.

[0009] Furthermore, the signal output end of the pressure sensor is connected to the signal input end of the servo motor via a wired data connection.

[0010] Furthermore, the flow blocking device includes an adjusting motor, the output shaft of the adjusting motor passes through the partition plate, and one end of the output shaft of the adjusting motor is fixedly mounted with the flow blocking plate by means of bolts.

[0011] Furthermore, when the regulating motor drives the spoiler to rotate to a horizontal state, the air duct between the partition plates is in a closed state, and the air inlet is in an open state. When the regulating motor drives the spoiler to rotate to a vertical state, the air duct between the partition plates is in an open state, and the air inlet is in a closed state.

[0012] This application has the following beneficial effects:

[0013] 1. When a large amount of dust adheres to the stroke device, resulting in a decrease in the airflow rate, it will move vertically upward under the action of the airflow, allowing the airflow to continue to flow through the diversion groove, avoiding the problem of excessive resistance to the airflow caused by excessive blockage of the stroke device close to the silent turbofan due to dust, thereby improving the reliability of the device when the pass rate of a single filter plate is reduced.

[0014] 2. During the displacement of the stroke device, the pressure sensor senses the increase in spring force, activates the servo motor to drive the screw rod to control the movement of the threaded stroke block by screwing in the thread, unfolds the filter cloth in a folded state, and at the same time folds the sleeve with a large amount of dust attached, thereby achieving the effect of replacing the filter cloth. This avoids the problem that traditional wall-mounted air purifiers are more easily blocked by dust due to their thin thickness and small filter plate area, resulting in the need for frequent cleaning, thereby improving the practicality of the device.

[0015] 3. When the device is in the self-cleaning state, the airflow enters the interior of the guide channel through the air inlet hole, and then enters the air duct located outside the partition plate through the guide hole, thereby removing the dust attached to the surface of the filter cloth during the purification process. The cross-sectional area of ​​the air duct outside the partition plate is smaller, and the airflow velocity is faster, thereby improving its cleaning effect. The high-speed airflow can drag the filter cloth to ensure that the filter cloth in the air duct that is partially folded but between the partition plates can enter the air duct outside the partition plate, and in the process of dragging, the baffle will contact and slide with the surface of the filter cloth, so that the adhesion effect of the dust attached to the surface of the filter cloth is reduced, and the baffle can also play a role in blocking the flow.

[0016] 4. The travel device and the filter device can be quickly disassembled and replaced, which reduces the complexity of the overall structure of the device, reduces the difficulty of disassembly and assembly, and enables more convenient maintenance and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments disclosed herein and, together with the description, serve to explain the principles disclosed herein.

[0018] The present disclosure can be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0019] Figure 1 It is a schematic diagram of the structure of the present invention;

[0020] Figure 2 It is a top view of the structure of the present invention;

[0021] Figure 3 The structure of the present invention Figure 2 Cross-section in the middle AA direction;

[0022] Figure 4 This is a schematic diagram of the internal structure of the present invention;

[0023] Figure 5 It is a front view of the internal structure of the structure of the present invention;

[0024] Figure 6 The structure of the present invention Figure 5 Cross-section in the middle BB direction;

[0025] Figure 7 The structure of the present invention Figure 5 Cross-section in the middle CC direction;

[0026] Figure 8 This is a schematic diagram of the structural stroke device of the present invention;

[0027] Figure 9 This is a main structural diagram of the structural stroke device of the present invention;

[0028] Figure 10 This is a top view of the main body of the structural stroke device of the present invention;

[0029] Figure 11 The structure of the present invention Figure 10 Cross-section in the middle DD direction;

[0030] Figure 12 The structure of the present invention Figure 11 Enlarged view of point E in the middle;

[0031] Figure 13 The structure of the present invention Figure 11 Cross-section in the FF direction;

[0032] Figure 14 This is a schematic diagram of the structural filtering device of the present invention;

[0033] Figure 15Schematic diagram of the structural flow-blocking device of the present invention.

[0034] In the figure; 1. outer shell; 2. sealing cover; 3. partition plate; 4. placement groove; 5. stroke device; 51. connecting rod; 52. stroke bar; 53. stroke groove; 54. servo motor; 55. screw rod; 56. threaded stroke block; 57. stroke rod; 58a. upper spoiler; 58b. lower spoiler; 59. filtering device; 591. sleeve; 592. filter cloth; 501. spoiler; 6. silent turbofan; 7. power machine; 8. dustproof air inlet groove; 9. air outlet; 10. guide channel; 11. guide hole; 12. blocking device; 121. adjusting motor; 122. spoiler; 13. air inlet; 14. diversion groove; 15. dust plug; 16. pressure sensor. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0036] A wall-mounted air purifier, see Figure 1-Figure 7, including a shell 1, a sealing cover 2 is fixedly installed on the front of the shell 1 by bolt connection, a partition plate 3 is fixedly installed on the bottom of the inner cavity of the shell 1 near both sides by welding, a placement groove 4 is cut on the top of the partition plate 3, the placement grooves 4 are distributed in a linear array, and a stroke device 5 is arranged on the top of the placement groove 4 by placement. A silent turbofan 6 is provided near the bottom of the inner cavity of the shell 1 through a bearing connecting sleeve, and a power machine 7 is fixedly installed near the bottom of the back of the sealing cover 2 by bolt connection, and one end of the output shaft of the power machine 7 is connected to the silent turbofan 6, a dustproof air inlet groove 8 is provided on the front of the sealing cover 2 near the bottom, and the dustproof air inlet groove 8 corresponds to the power machine 7. An air outlet 9 is provided on the front of the sealing cover 2 near the top, and a guide channel 10 is fixedly installed by welding on the back of the shell 1 near both sides. A guide hole 11 is drilled on both sides of the inner cavity of the sealing cover 2 near the top, and a flow blocking device 12 is fixedly installed on both sides of the partition plate 3 near the bottom by bolt connection. The bottom of the inner cavity of the shell 1 is located at the inner side of the partition plate 3 near the bottom and is drilled by a drilling machine. The air inlet 13, the guide hole 11 and the air inlet 13 are all connected to the guide channel 10. The bottom of the inner cavity of the shell 1 and the back of the sealing cover 2 are located above the stroke device 5 and are provided with a diversion groove 14 by casting. The stroke device 5 is provided by placing the top of the groove 4. When the stroke device 5 works for a long time, too much dust adheres to the surface, causing the gas passing rate to decrease and the resistance to increase, thereby pushing the stroke device 5 to move vertically upward as a whole. Since the bottom of the inner cavity of the shell 1 and the back of the sealing cover 2 are located above the stroke device 5 by casting, A diverter groove 14 is provided so that the stroke device 5 will be in a position corresponding to the diverter groove 14 during the overall movement, so that the airflow can continue to flow through the diverter groove 14, avoiding the problem that the stroke device 5 close to the silent turbofan 6 is excessively blocked by dust, causing excessive resistance to the airflow and resulting in reduced air purification efficiency, thereby improving the reliability of the device when the pass rate of a single filter plate is reduced. A dust plug 15 is provided at the bottom of the inner cavity of the outer shell 1 through the shaft hole, and a pressure sensor 16 is fixedly installed on the inner side of the partition plate 3 at a position above the placement groove 4 by welding.

[0037] See also Figure 3-Figure 5 and Figures 8-13The stroke device 5 includes a connecting rod 51, and the two ends of the connecting rod 51 are fixedly installed with a stroke bar 52 by bolt connection. The inner side of the stroke bar 52 is cut to form a stroke groove 53. One end of the stroke groove 53 is fixedly installed with a servo motor 54 by bolt connection. One end of the output shaft of the servo motor 54 is fixedly installed with a screw rod 55 by bolt connection. The outer surface of the screw rod 55 is provided with a threaded stroke block 56 through a threaded fitting sleeve. The threaded stroke block 56 is movably installed in the interior of the stroke groove 53. One side of the threaded stroke block 56 is fixedly installed with a stroke rod 57 by clamping. The top and bottom of the connecting rod 51 are located on both sides of the stroke groove 53 and are fixedly installed with an upper spoiler 58a and a lower spoiler 58b by welding. The outer surfaces of the connecting rod 51 and the stroke rod 57 A filter device 59 is provided through the shaft hole and the movable sleeve, and a baffle 501 is fixedly installed on the top of the lower baffle 58b by a snap-on connection. When the machine needs to be disassembled for maintenance, the bolt connection can be released and the sealing cover 2 can be removed to expose the stroke device 5 inside the equipment, so that the stroke device 5 can be directly removed. When the filter device 59 needs to be disassembled, the bolt connection between the connecting rod 51 and the baffle 501 and the bolt connection between the threaded stroke block 56 and the stroke rod 57 can be released to separate the connecting rod 51 from the stroke bar 52, thereby removing the filter device 59 for maintenance or replacement. This reduces the complexity of the overall structure of the device, reduces the difficulty of disassembly and assembly, and enables more convenient maintenance and replacement.

[0038] See also Figure 3-Figure 5 and Figure 14-15 , the filter device 59 includes a sleeve 591, the number of the sleeve 591 is three, and they are respectively sleeved on the outer surface of the connecting rod 51 and the stroke rod 57, the outer surface of the sleeve 591 is fixedly mounted with a filter cloth 592 by snap-fitting, and the sleeve 591 is connected by the filter cloth 592. When the device is in the self-cleaning state, the regulating motor 121 drives the spoiler 122 to rotate to a horizontal state, so that the air duct between the partition plates 3 is in a blocked state. At this time, the silent turbofan 6 generates airflow through the air inlet hole 13 into the interior of the guide channel 10, and then passes through the guide channel 10. The flow hole 11 enters the air duct located on the outside of the partition plate 3, thereby flushing the filter cloth 592 in the folded state in the opposite direction, thereby removing the dust attached to the surface of the filter cloth 592 during the purification process, so that it can operate normally in subsequent purification operations, further improving the practicality of the device. Since the cross-sectional area of ​​the air duct outside the partition plate 3 is small and the power of the silent turbofan 6 is constant, the airflow can flow at high speed in the air ducts on both sides of the partition plate 3, thereby improving its cleaning effect and enabling it to work for a longer time in subsequent purification operations.

[0039] See also Figure 3-Figure 4 and Figure 9The top of the upper spoiler 58a is fixedly connected to the bottom of the pressure sensor 16 by a spring. When the airflow permeability of the stroke device 5 is reduced, displacement will occur, so that the distance between the stroke device 5 as a whole and the pressure sensor 16 is reduced, resulting in the spring connecting the upper spoiler 58a and the pressure sensor 16 being compressed, and the elastic force of the spring is increased and sensed by the pressure sensor 16.

[0040] See also Figure 3-Figure 4 , Figure 11 and Figure 14 The signal output end of the pressure sensor 16 is connected to the signal input end of the servo motor 54 through a wired data connection. The servo motor 54 is activated to drive the screw rod 55 to control the movement of the screw stroke block 56 by screwing in the thread, so that the stroke rod 57 drags the sleeve 591 in the middle, and then unfolds the filter cloth 592 in a folded state, and at the same time folds the sleeve 591 with a large amount of dust attached, thereby achieving the effect of replacing the filter cloth 592, so that it can continue to perform the purification operation, avoiding the problem that the traditional wall-mounted air purifier is more easily blocked by dust due to its thin thickness and small filter plate area, resulting in the need for frequent cleaning, thereby improving the practicality of the device, and the high-speed airflow acts on the filter cloth 592. The force acting on the surface of the filter cloth 592 is also improved. A larger force drags the filter cloth 592 in the folded state, ensuring that the filter cloth 592 in the air duct that is partially folded but between the partition plates 3 can enter the air duct outside the partition plate 3, thereby improving its cleaning ability. In the process of dragging, the baffle 501 will contact and slide with the surface of the filter cloth 592, so that the filter cloth 592 can be pre-cleaned before entering the air duct outside the partition plate 3, thereby reducing the adhesion effect of dust attached to the surface of the filter cloth 592, so that it can be better cleaned, thereby improving its cleaning efficiency. In addition, the baffle 501 can also play a blocking effect to prevent the airflow in different air ducts from flowing into each other.

[0041] See also Figure 15 The flow blocking device 12 includes an adjusting motor 121 , an output shaft of the adjusting motor 121 passes through the partition plate 3 , and one end of the output shaft of the adjusting motor 121 is fixedly mounted with a flow blocking plate 122 via a bolt connection.

[0042] See also Figure 5 and Figure 15 When the regulating motor 121 drives the spoiler 122 to rotate to a horizontal state, the air duct between the partition plates 3 is in a closed state, and the air inlet 13 is in an open state. When the regulating motor 121 drives the spoiler 122 to rotate to a vertical state, the air duct between the partition plates 3 is in an open state, and the air inlet 13 is in a closed state.

[0043] The method of use of the present invention is as follows:

[0044] During use, when the stroke device 5 works for a long time, too much dust adheres to the surface, resulting in a decrease in gas flow rate and an increase in resistance, thereby pushing the stroke device 5 to move vertically upward as a whole. Since the bottom of the inner cavity of the shell 1 and the back of the sealing cover 2 are located above the stroke device 5 and are provided with a diverter groove 14 through casting, the stroke device 5 will be in a position corresponding to the diverter groove 14 during the overall movement, so that the air flow can continue to flow through the diverter groove 14. When the air flow permeability of the stroke device 5 is reduced, it will be displaced, so that the distance between the stroke device 5 and the pressure sensor 16 is reduced, resulting in the connection. The springs of the baffle 58a and the pressure sensor 16 are compressed, and the elastic force of the spring increases and is sensed by the pressure sensor 16. At this time, the signal output end of the pressure sensor 16 is connected to the signal input end of the servo motor 54 through a wired data connection, and the servo motor 54 is activated to drive the screw rod 55 to control the movement of the threaded stroke block 56 by screwing in the thread, so that the stroke rod 57 drags the sleeve 591 in the middle, and then unfolds the filter cloth 592 in a folded state, and at the same time folds the sleeve 591 with a large amount of dust attached, thereby achieving the effect of replacing the filter cloth 592, so that it can continue the purification operation.

[0045] When the device is in the self-cleaning state, the regulating motor 121 drives the baffle 122 to rotate to the horizontal state, so that the air duct between the partition plates 3 is in a blocked state. At this time, the silent turbofan 6 generates airflow through the air inlet 13 into the interior of the guide channel 10, and then enters the air duct located outside the partition plate 3 through the guide hole 11, thereby washing the filter cloth 592 in the folded state in the opposite direction, thereby removing the dust attached to the surface of the filter cloth 592 during the purification process, so that it can operate normally in subsequent purification operations. Since the cross-sectional area of ​​the air duct outside the partition plate 3 is small, and the power of the silent turbofan 6 is one The airflow is fixed so that it can flow at high speed in the air ducts on both sides of the partition plate 3, thereby improving its cleaning effect. The force of the high-speed airflow on the surface of the filter cloth 592 is also improved. The larger force drags the filter cloth 592 in the folded state, ensuring that the filter cloth 592 in the air duct that is partially folded but between the partition plates 3 can enter the air duct outside the partition plate 3. During the dragging process, the baffle 501 will contact and slide with the surface of the filter cloth 592, so that the filter cloth 592 can be pre-cleaned before entering the air duct outside the partition plate 3, so that the adhesion effect of dust attached to the surface of the filter cloth 592 is reduced.

[0046] When the machine needs to be disassembled for maintenance, the bolt connection can be released and the sealing cover 2 can be removed to expose the stroke device 5 inside the equipment, so that the stroke device 5 can be directly removed. When the filter device 59 needs to be disassembled, the bolt connection between the connecting rod 51 and the baffle 501 can be released, and the bolt connection between the threaded stroke block 56 and the stroke rod 57 can be released, so that the connecting rod 51 and the stroke bar 52 can be separated, thereby removing the filter device 59 for maintenance or replacement.

Claims

1. A wall-mounted air purifier, characterized in that: The invention comprises a shell (1), a sealing cover (2) is fixedly installed on the front of the shell (1), a partition plate (3) is fixedly installed at a position near both sides of the bottom of the inner cavity of the shell (1), a placement groove (4) is opened on the top of the partition plate (3), the placement grooves (4) are distributed in a linear array, and a stroke device (5) is provided on the top of the placement groove (4), a silent turbofan (6) is sleeved on the bottom of the inner cavity of the shell (1), a power machine (7) is fixedly installed on the back of the sealing cover (2), one end of the output shaft of the power machine (7) is matched with the silent turbofan (6), a dustproof air inlet groove (8) is provided on the front of the sealing cover (2), and the dustproof air inlet groove (8) is connected to the sealing cover (2). Corresponding to the power machine (7), the sealing cover (2) is provided with an air outlet (9) at a position near the top of the front, the housing (1) is fixedly provided with a guide channel (10) at a position near both sides of the back, the sealing cover (2) is provided with a guide hole (11) at a position near the top of the bottom of the inner cavity, the partition plate (3) is fixedly provided with a flow blocking device (12) at a position near the bottom, the inner cavity bottom of the housing (1) is provided with an air inlet (13) at a position near the bottom of the inner side of the partition plate (3), the guide hole (11) and the air inlet (13) are both connected to the guide channel (10), and the inner cavity bottom of the housing (1) and the back of the sealing cover (2) are provided with a diversion groove at a position above the stroke device (5). (14), a dust plug (15) is sleeved below the inner cavity of the shell (1), and a pressure sensor (16) is fixedly installed on the inner side of the partition plate (3) at a position above the placement groove (4); the stroke device (5) includes a connecting rod (51), and a stroke bar (52) is fixedly installed at both ends of the connecting rod (51), and a stroke groove (53) is opened on the inner side of the stroke bar (52), and a servo motor (54) is fixedly installed at one end of the stroke groove (53), and a screw rod (55) is fixedly installed at one end of the output shaft of the servo motor (54), and a threaded stroke block (56) is sleeved on the outer surface of the screw rod (55), and the threaded stroke block (56) is movably installed inside the stroke groove (53). 6) is fixedly mounted on one side of the travel rod (57), an upper baffle (58a) and a lower baffle (58b) are fixedly mounted on the top and bottom of the connecting rod (51) at positions on both sides of the travel groove (53), respectively, a filter device (59) is movably sleeved on the outer surfaces of the connecting rod (51) and the travel rod (57), and a baffle (501) is fixedly mounted on the top of the lower baffle (58b); the filter device (59) comprises a sleeve (591), the number of the sleeves (591) is three, and the sleeves (591) are respectively sleeved on the outer surfaces of the connecting rod (51) and the travel rod (57), a filter cloth (592) is fixedly mounted on the outer surface of the sleeve (591), and the sleeves (591) are connected through the filter cloth (592).

2. A wall-mounted air purifier according to claim 1, characterized in that: The top of the upper spoiler (58a) is fixedly connected to the bottom of the pressure sensor (16) via a spring.

3. The wall-mounted air purifier according to claim 1, characterized in that: The signal output end of the pressure sensor (16) is connected to the signal input end of the servo motor (54) via a wired data connection.

4. The wall-mounted air purifier according to claim 1, characterized in that: The flow blocking device (12) comprises an adjusting motor (121), an output shaft of the adjusting motor (121) passes through the partition plate (3), and a flow blocking plate (122) is fixedly mounted on one end of the output shaft of the adjusting motor (121).

5. A wall-mounted air purifier according to claim 4, characterized in that: When the regulating motor (121) drives the spoiler (122) to rotate to a horizontal state, the air duct between the partition plates (3) is in a closed state, and the air inlet (13) is in an open state. When the regulating motor (121) drives the spoiler (122) to rotate to a vertical state, the air duct between the partition plates (3) is in an open state, and the air inlet (13) is in a closed state.

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