A blowing-suction conversion structure for a blowing-suction fan and a blowing-suction fan

Abstract

The present invention shows a blowing-suction conversion structure for a blowing-suction fan and a blowing-suction fan, comprising a casing and a bracket, the casing surface is provided with an air inlet and an air outlet, a stud for installing the bracket is provided between the air inlet and the air outlet, the bracket is provided with a first air outlet and a second air outlet, the bracket is rotatably connected to the stud, an air duct is installed on the first air outlet, an air inlet hood or a dust bag is installed on the second air outlet, when the first air outlet is docked with the air inlet, the blowing-suction fan is in a suction mode, when the first air outlet is docked with the air outlet, the blowing-suction fan is in a blowing mode, the bracket rotates around the stud to realize the switching of the blowing-suction mode, and it is convenient to change the blowing and suction modes.

Description

[Technical field]

[0001] The invention relates to a blowing-suction conversion structure for a blowing-suction fan and the blowing-suction fan, belonging to the technical field of blowing-suction fans. [Background technology]

[0002] The blower-suction machine needs to have both blowing and suction functions. In the structure of the axial fan blowing and suction in the same tube, one solution is to achieve it through the forward and reverse rotation of the motor. The defect of this solution is that the suction or suction performance is weak; another solution is to achieve the blowing and suction conversion by switching the air outlet through rotating the motor assembly, which has a complex structure and high cost. [Summary of the invention]

[0003] The technical problem to be solved by the present invention is to provide a blowing-suction conversion structure and a blowing-suction fan for a blowing-suction fan, so as to facilitate the switching of the blowing and suction modes.

[0004] To solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A blowing-suction conversion structure for a blowing-suction fan comprises a casing and a bracket, wherein an air inlet and an air outlet are provided on the surface of the casing, a stud for installing the bracket is provided between the air inlet and the air outlet, a first air outlet and a second air outlet are provided on the bracket, the bracket is rotatably connected to the stud, an air duct is installed on the first air outlet, an air inlet hood or a dust bag is installed on the second air outlet, when the first air outlet is docked with the air inlet, the blowing-suction fan is in a suction mode, and when the first air outlet is docked with the air outlet, the blowing-suction fan is in a blowing mode, and the bracket rotates around the stud to achieve switching of the blowing-suction mode.

[0006] The beneficial effects of adopting the present invention are:

[0007] The blowing and suction conversion structure in the present invention comprises a casing and a bracket, a motor assembly is arranged in the casing, an air inlet and an air outlet are arranged on the surface of the casing, the motor assembly blows the airflow from the air inlet to the air outlet, a first air outlet and a second air outlet are arranged on the bracket, an air duct is installed on the first air outlet, an air inlet cover or a dust bag is installed on the second air outlet, a stud is arranged on the casing, the bracket is rotatably connected to the stud, and the bracket can rotate around the stud to change the position of the first air outlet and the second air outlet, when the first air outlet is docked with the air inlet When the first air outlet is connected to the air outlet, the second air outlet is connected to the air outlet. At this time, the airflow enters the first air outlet along the air duct, and the motor assembly makes the airflow flow from the air inlet to the air outlet. At this time, a dust bag is installed at the second air outlet to realize the suction mode of the blowing-suction fan; when the first air outlet is connected to the air outlet, the second air outlet is connected to the air inlet. At this time, an air inlet hood is installed at the air outlet, and the airflow enters the second air outlet along the air inlet hood. The motor assembly makes the airflow flow from the air inlet to the air outlet, and finally flows from the first air outlet to the air duct, and is blown to the outside along the air duct, thereby realizing the blowing mode of the blowing-suction fan.

[0008] In the present invention, the blowing and suction modes of the blowing and suction fan can be switched by rotating the bracket, and the operation is simple and quick, which can save the time of the staff in switching modes and improve the work efficiency of the staff; in addition, the wind direction between the air inlet and the air outlet does not change during the switching process of the blowing and suction modes of the blowing and suction fan described in the present invention, and will not affect the blowing and suction performance of the blowing and suction fan, thereby ensuring that the staff can complete their work tasks in time.

[0009] Preferably, the bracket is provided with a through hole for the stud to pass through, a cover plate is installed on the through hole, a threaded hole for installing a screw is provided at the end of the stud, and the cover plate is provided with a mounting hole for the screw to pass through.

[0010] Preferably, a mounting platform is provided at the connection between the stud and the casing, a first slope surface is provided on the surface of the mounting platform, a resistance platform is provided in the through hole, a resistance surface is provided on the side of the resistance platform facing the mounting platform, a second slope surface is provided on the resistance surface, and a reset spring is provided between the resistance platform and the cover plate.

[0011] Preferably, the casing is provided with a switch, the switch includes a button, the casing surface is provided with a first notch for avoiding the button, the bracket is provided with two second notches for avoiding the button, the air inlet hood and the dust bag are provided with ribs for resisting the button, and the ribs resist the button after the air inlet hood or the dust bag is installed.

[0012] Preferably, a first connecting seat for installing an air inlet cover is provided on the side of the second air outlet, a first connecting seat is provided with a first connecting hole, a first connecting column is provided on the air inlet cover, the first connecting column is rotatably connected to the first connecting hole, a first buckle is provided on the side of the air inlet cover away from the first connecting column, and a first protrusion connected to the first buckle is provided on the second air outlet.

[0013] Preferably, a second connecting seat for installing a dust bag is provided on the side of the second air outlet, a second connecting hole is provided on the second connecting seat, a second connecting column is provided on the dust bag, the second connecting column is rotatably connected to the second connecting hole, a second buckle is provided on the side of the dust bag away from the second connecting column, and a second convex strip connected to the second buckle is provided on the second air outlet.

[0014] Preferably, the dust bag is detachably connected to the second connecting seat.

[0015] Preferably, the air inlet hood is provided with a first buckle, which is rotatably connected to the air inlet hood, and the dust bag is provided with a second buckle, which is rotatably connected to the dust bag, and the first buckle and the second buckle both include a dial knob, a rotating shaft, a torsion spring and a clamping head.

[0016] Preferably, a protrusion is provided on the side wall of the first air outlet, and the air duct is provided with a mounting groove cooperating with the protrusion, and the protrusion cooperates with the mounting groove to realize a detachable connection between the first air outlet and the air duct.

[0017] The present invention also shows a blowing-suction fan, which is provided with a blowing-suction conversion structure, and the blowing-suction conversion structure adopts a blowing-suction conversion structure for a blowing-suction fan as described in any one of the above items.

[0018] Other features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings.

Brief Description of the Drawings

[0019] The present invention will be further described below in conjunction with the accompanying drawings:

[0020] Figure 1 An exploded view of the overall structure of an embodiment of the present invention;

[0021] Figure 2 It is a schematic diagram of the overall structure in the blowing mode in an embodiment of the present invention;

[0022] Figure 3 is a cross-sectional view of an embodiment of the present invention in a blowing mode;

[0023] Figure 4 It is a schematic diagram of the overall structure in the air inhalation mode in an embodiment of the present invention;

[0024] Figure 5 is a cross-sectional view of an embodiment of the present invention in an air intake mode;

[0025] Figure 6 It is a schematic diagram of the overall structure of the bracket rotating in an embodiment of the present invention;

[0026] Figure 7 This is a front view of the bracket rotating in an embodiment of the present invention;

[0027] Figure 8 is a front view of a housing in an embodiment of the present invention;

[0028] Fig. 9 is a side view of a housing according to an embodiment of the present invention;

[0029] Fig.10 for Figure 3 A partial enlarged view of part C in the middle;

[0030] Fig.11 for Fig. 9 A partial enlarged view of part D in the middle;

[0031] Fig.12 A front view of a bracket in an embodiment of the present invention;

[0032] Fig.13 for Fig.12 Cross-sectional view of the AA section;

[0033] Fig.14 for Fig.12 Cross-sectional view of the middle BB part;

[0034] Fig.15 This is a front view of the air inlet cover in an embodiment of the present invention;

[0035] Fig.16 This is a front view of a dust collecting bag in an embodiment of the present invention;

[0036] Fig.17 is a side view of a dust collecting bag in an embodiment of the present invention;

[0037] Fig.18 for Fig.17 A partial enlarged view of part E in the middle;

[0038] Fig.19 It is a side view of the buckle in the embodiment of the present invention.

[0039] Reference numerals: 1 housing, 11 left housing, 12 right housing, 13 air inlet, 14 air outlet, 15 power switch, 16 power pressure plate, 17 power cord, 171 power sheath, 18 first notch, 19 switch, 191 button, 2 bracket, 21 first air outlet, 211 bump, 22 second air outlet, 23 through hole, 231 contact platform, 232 second slope surface, 233 return spring, 234 cover plate, 235 screw, 24 first connecting seat, 241 first connecting hole, 25 second connecting seat, 251 second connecting hole, 26 second notch, 27 first convex strip, 28 second convex strip, 3 motor, 31 fan blade, 41 stud, 411 threaded hole, 42 mounting platform, 43 first slope surface, 5 air inlet cover, 51 first connecting column, 52 first convex rib, 6 dust bag, 61 second connecting column, 62 second convex rib, 71 first buckle, 72 second buckle, 73 dial, 74 clamp, 75 rotating shaft, 76 torsion spring, 8 air duct, 81 mounting groove, 9 airflow. [Specific implementation method]

[0040] The technical solutions of the embodiments of the present invention are explained and described below in conjunction with the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly defined.

[0043] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] Embodiment 1:

[0045] like Figures 1 to 19 As shown, this embodiment shows a blowing-suction conversion structure for a blowing-suction fan, including a casing 1 and a bracket 2, an air inlet 13 and an air outlet 14 are provided on the surface of the casing 1, a stud 41 for installing the bracket 2 is provided between the air inlet 13 and the air outlet 14, a first air outlet 21 and a second air outlet 22 are provided on the bracket 2, the bracket 2 is rotatably connected to the stud 41, an air duct 8 is installed on the first air outlet 21, and an air inlet hood 5 or a dust bag 6 is installed on the second air outlet 22, when the first air outlet 21 is docked with the air inlet 13, the blowing-suction fan is in a suction mode, when the first air outlet 21 is docked with the air outlet 14, the blowing-suction fan is in a blowing mode, and the bracket 2 rotates around the stud 41 to achieve switching of the blowing-suction mode.

[0046] In this embodiment, the air inlet 13 and the air outlet 14 are symmetrically distributed on both sides of the stud 41. A mounting platform 42 is provided at the connection between the stud 41 and the casing 1. The stud 41 is located at the center of the mounting platform 42. Two first sloped surfaces 43 are provided on the surface of the mounting platform 42. The bracket 2 is provided with a through hole 23 for the stud 41 to pass through. A conflicting platform 231 is provided in the through hole 23. The side of the conflicting platform 231 facing the mounting strip is a conflicting surface. Two corresponding second sloped surfaces 232 are also provided on the conflicting surface. When the bracket 2 is installed on the stud 41, the conflicting surface and the surface of the mounting platform 42 contact each other, so that the first sloped surface 43 on the mounting platform 42 matches the second sloped surface 232 on the conflicting platform 231. In addition, in this embodiment, a cover plate 234 is installed on the through hole 23. The cover plate 234 is provided with a mounting hole for the screw 235 to pass through. The end of the stud 41 is provided with a second sloped surface 232 for installing the screw. The threaded hole 411 of the stud 41 is provided with a gasket. When installing, the cover plate 234 is installed on the through hole 23. The screw 235 passes through the installation hole and is inserted into the threaded hole 411 of the stud 41. The cover plate 234 is fixed to the through hole 23 through the cooperation between the screw 235 and the threaded hole 411. A return spring 233 is provided in the through hole 23. The return spring 233 is located between the abutment platform 231 and the cover plate 234. During the rotation of the bracket 2 in this embodiment, the bracket 2 is lifted up under the action of the first slope surface 43 and the second slope surface 232, so that a gap is generated between the bracket 2 and the housing 1, which can greatly reduce the friction force of the bracket 2 during the rotation process and facilitate the rotation of the bracket 2. After rotating 180 degrees, the bracket 2 is separated from the highest point of the first slope surface 43 and the second slope surface 232, and at the same time, the bracket 2 is attached to the housing 1 again under the action of the return spring 233.

[0047] In addition, in the present embodiment, a first connecting seat 24 for installing the air inlet cover 5 is provided on the side of the second air outlet 22, a first connecting hole 241 is provided on the first connecting seat 24, a first connecting column 51 is provided on the air inlet cover 5, the first connecting column 51 is rotatably connected to the first connecting hole 241, a first buckle 71 is provided on the side of the air inlet cover 5 away from the first connecting column 51, a first convex strip 27 cooperating with the first buckle 71 is provided on the side wall of the second air outlet 22, during installation, the air inlet cover 5 can be covered on the second air outlet 22 by buckling the first buckle 71 on the first convex strip 27, when the blowing and suction fan is in use, larger garbage can be prevented from entering the air inlet 13 through the second air outlet 22, thereby protecting the blowing and suction fan, a second connecting seat 25 for installing the dust bag 6 is provided on the other side of the second air outlet 22, the first connecting The seat 24 and the second connecting seat 25 are distributed on both sides of the second air outlet 22, and a second connecting hole 251 is provided on the second connecting seat 25, and a second connecting column 61 is provided on the dust bag 6, and the second connecting column 61 is rotatably connected to the second connecting hole 251. A second buckle 72 is provided on the side of the dust bag 6 away from the second connecting column 61, and a second convex strip 28 connected to the second buckle 72 is provided on the second air outlet 22. During installation, the dust bag 6 can be covered on the second air outlet 22 by buckling the second buckle 72 on the second convex strip 28. When the blowing-suction fan is in the suction mode, the dust bag 6 can collect garbage such as leaves. Secondly, a notch is provided on the second connecting hole 251, so that the dust bag 6 and the second connecting seat 25 can be detachably connected. When the blowing-suction fan is in the blowing mode, the dust bag 6 can be removed from the second connecting seat 25.

[0048] In this embodiment, the housing 1 is provided with a receiving cavity, in which a switch 19 is installed, and the switch 19 includes a button 191. The housing 1 is provided with a first notch 18 on its surface to avoid the button 191, and the bracket 2 is provided with two second notches 26 for avoiding the button 191. The two second notches 26 are symmetrically distributed on both sides of the through hole 23 with respect to the center of the through hole 23. When the blower-suction fan is in the blowing mode, one of the second notches 26 on the bracket 2 is aligned with the first notch 18 to expose the button 191. When the blower-suction fan is in the suction mode, the bracket 2 passes through 18 0 degree rotation, so that another second notch 26 on the bracket 2 is aligned with the first notch 18, the air inlet cover 5 is provided with a first convex rib 52, and the dust bag 6 is provided with a second convex rib 62. When the air inlet cover 5 or the dust bag 6 is covered on the second air outlet 22, the first convex rib 52 or the second convex rib 62 contacts the button 191 through the second notch 26, so that the switch 19 is turned on; in this embodiment, the fan blade 31 can only be started when the switch 19 is turned on, so as to realize the start of the blowing and suction fan. The switch 19 can ensure that the blowing and suction fan can be started only when it is fully installed, so as to avoid danger to the staff when using it.

[0049] Regarding the first buckle 71 and the second buckle 72, in the present embodiment, the first buckle 71 and the second buckle 72 both include a dial knob 73, a rotating shaft 75, a torsion spring 76 and a clamping head 74. The first buckle 71 and the second buckle 72 are rotatably connected to the air inlet hood 5 and the dust bag 6 respectively through the rotating shaft 75. The torsion spring 76 is installed on the rotating shaft 75. The first buckle 71 and the second buckle 72 are respectively clamped with the first convex strip 27 and the second convex strip 28 through the clamping head 74, thereby realizing the installation of the air inlet hood 5 and the dust bag 6.

[0050] In the present embodiment, a protrusion 211 is provided on the side wall of the first air outlet, and an airflow 981 is provided on the air duct 8. When the air duct 8 is installed, the air duct 8 is sleeved on the first air outlet so that the protrusion 211 enters the airflow 981 to achieve the connection between the air duct 8 and the first air outlet. Of course, it can be understood that in other embodiments, the protrusion 211 can also be provided on the air duct 8, and the airflow 981 is provided on the first air outlet.

[0051] The switching process of the blowing and suction mode of the blowing and suction fan in this embodiment is as follows:

[0052] Suction mode: the first air outlet 21 is connected to the air inlet 13, the second air outlet 22 is connected to the air outlet 14, a dust bag 6 is installed at the second air outlet 22, and the second rib 62 on the dust bag 6 contacts the button 191 through the second notch 26. After the power is turned on, the motor 3 assembly can be started, and the motor 3 controls the fan blade 31 to rotate. At this time, the airflow enters the first air outlet 21 along the air duct 8 and enters the inside of the housing 1 through the air inlet 13. Under the action of the fan blade 31, the airflow flows from the air inlet 13 to the air outlet 14, and finally flows into the dust bag 6, so that the suction mode of the blowing and suction fan can be realized;

[0053] Blowing mode: the first air outlet 21 is connected to the air outlet 14, the second air outlet 22 is connected to the air inlet 13, the air inlet cover 5 is installed at the second air outlet 22, the first rib 52 on the air inlet cover 5 is in contact with the button 191 through the second notch 26, the motor 3 assembly can be started after the power is turned on, the motor 3 controls the fan blade 31 to rotate, at this time, the airflow enters the second air outlet 22 along the air inlet cover 5, and enters the inside of the housing 1 through the air inlet 13, under the action of the fan blade 31, the airflow flows from the air inlet 13 to the air outlet 14, and finally blows to the outside along the air duct 8, so that the suction mode of the blowing and suction fan can be realized;

[0054] Blowing and suction mode switching process: When switching between blowing and suction modes, first stop the motor 3 assembly, then disconnect the air inlet hood 5 or the dust bag 6 from the second air outlet 22, and by pressing the dial 73 of the first buckle 71 or the second buckle 72 to disengage the clamping head 74 from the first convex strip 27 or the second convex strip 28, the air inlet hood 5 or the dust bag 6 can be disconnected from the second air outlet 22, and the first convex rib 52 or the second convex rib 62 will also be separated from the button 191, and then the bracket 2 is rotated along the stud 41. When it is rotated to 90 degrees, it is convenient to clean the casing 1 and the bracket 2. When it is rotated to 180 degrees, the switching between the blowing mode and the suction mode is completed, and then the air inlet hood 5 or the dust bag 6 is closed to make the first convex rib 52 or the second convex rib 62 abut against the button 191, so that the blowing and suction fan can be started normally.

[0055] Embodiment 2:

[0056] like Figures 1 to 9As shown, this embodiment shows a blowing-suction fan, in which a blowing-suction fan conversion structure as described in Example 1 or other identical embodiments is provided. In this embodiment, the casing 1 includes a left casing 111 and a right casing 121, and the left casing 111 and the right casing 121 are spliced ​​by screws 235. A power cord 17 is installed on the right casing 121, and a power sheath 171 is provided at the connection between the power cord 17 and the right casing 121. The casing 1 includes a handle, and a power switch 15 and a power pressure plate 16 are provided on the handle. The power cord 17 is connected to the power switch 15, and the power switch 15 can be turned on by pressing the power pressure plate 16.

[0057] The switching process of the blowing and suction mode of the blowing and suction fan in this embodiment is as follows:

[0058] Suction mode: the first air outlet 21 is connected to the air inlet 13, the second air outlet 22 is connected to the air outlet 14, a dust bag 6 is installed at the second air outlet 22, and the second rib 62 on the dust bag 6 contacts the button 191 through the second notch 26. After the power is turned on, the motor 3 assembly can be started, and the motor 3 controls the fan blade 31 to rotate. At this time, the airflow enters the first air outlet 21 along the air duct 8 and enters the inside of the housing 1 through the air inlet 13. Under the action of the fan blade 31, the airflow flows from the air inlet 13 to the air outlet 14, and finally flows into the dust bag 6, so that the suction mode of the blowing and suction fan can be realized;

[0059] Blowing mode: the first air outlet 21 is connected to the air outlet 14, the second air outlet 22 is connected to the air inlet 13, the air inlet cover 5 is installed at the second air outlet 22, the first rib 52 on the air inlet cover 5 is in contact with the button 191 through the second notch 26, the motor 3 assembly can be started after the power is turned on, the motor 3 controls the fan blade 31 to rotate, at this time, the airflow enters the second air outlet 22 along the air inlet cover 5, and enters the inside of the housing 1 through the air inlet 13, under the action of the fan blade 31, the airflow flows from the air inlet 13 to the air outlet 14, and finally blows to the outside along the air duct 8, so that the suction mode of the blowing and suction fan can be realized;

[0060] Blowing and suction mode switching process: When switching between blowing and suction modes, first stop the motor 3 assembly, then disconnect the air inlet hood 5 or the dust bag 6 from the second air outlet 22, and by pressing the dial 73 of the first buckle 71 or the second buckle 72 to disengage the clamping head 74 from the first convex strip 27 or the second convex strip 28, the air inlet hood 5 or the dust bag 6 can be disconnected from the second air outlet 22, and the first convex rib 52 or the second convex rib 62 will also be separated from the button 191, and then the bracket 2 is rotated along the stud 41. When it is rotated to 90 degrees, it is convenient to clean the casing 1 and the bracket 2. When it is rotated to 180 degrees, the switching between the blowing mode and the suction mode is completed, and then the air inlet hood 5 or the dust bag 6 is closed to make the first convex rib 52 or the second convex rib 62 abut against the button 191, so that the blowing and suction fan can be started normally.

[0061] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims

1. A blowing-suction conversion structure for a blowing-suction fan, characterized in that: The invention comprises a casing and a bracket, the casing surface is provided with an air inlet and an air outlet, a stud for mounting the bracket is provided between the air inlet and the air outlet, the bracket is provided with a first air inlet and a second air outlet, the bracket is rotatably connected to the stud, an air duct is installed on the first air inlet, an air inlet hood or a dust bag is installed on the second air outlet, when the first air inlet is docked with the air inlet, the blowing and suction fan is in a suction mode, when the first air inlet is docked with the air outlet, the blowing and suction fan is in a blowing mode, and the bracket rotates around the stud to realize the switching of the blowing and suction modes; the bracket is provided with a through hole for the stud to pass through, a cover plate is installed on the through hole, a threaded hole for mounting a screw is provided at the end of the stud, and the cover plate is provided with a mounting hole for the screw to pass through; the connection between the stud and the casing is provided with a There is a mounting platform, the surface of the mounting platform is provided with a first slope surface, the through hole is provided with a resistance platform, the side of the resistance platform facing the mounting platform is provided with a resistance surface, the resistance surface is provided with a second slope surface, the through hole is provided with a reset spring, and the reset spring is located between the resistance platform and the cover plate; when the bracket is installed on the stud, the resistance surface and the surface of the mounting platform are in contact with each other, so that the first slope surface on the mounting platform and the second slope surface on the resistance platform cooperate with each other, and during the rotation of the bracket, the bracket is lifted up under the action of the first slope surface and the second slope surface, so that a gap is generated between the bracket and the casing; after rotating 180 degrees, the bracket is separated from the highest points of the first slope surface and the second slope surface, and at the same time, the bracket is attached to the casing again under the action of the reset spring.

2. The blowing-suction conversion structure for a blowing-suction fan according to claim 1, characterized in that: The casing is provided with a switch, the switch includes a button, the casing surface is provided with a first notch for avoiding the button, the bracket is provided with two second notches for avoiding the button, the air inlet cover and the dust bag are both provided with ribs for abutting the button, and the ribs abut the button after the air inlet cover or the dust bag is installed.

3. The blowing-suction conversion structure for a blowing-suction fan according to claim 1, characterized in that: A first connecting seat for installing an air inlet cover is provided on the side of the second air outlet, a first connecting hole is provided on the first connecting seat, a first connecting column is provided on the air inlet cover, the first connecting column is rotatably connected to the first connecting hole, a first buckle is provided on the side of the air inlet cover away from the first connecting column, and a first protrusion connected to the first buckle is provided on the second air outlet.

4. The blowing-suction conversion structure for a blowing-suction fan according to claim 1, characterized in that: A second connecting seat for installing a dust bag is provided on the side of the second air outlet, a second connecting hole is provided on the second connecting seat, a second connecting column is provided on the dust bag, the second connecting column is rotatably connected to the second connecting hole, a second buckle is provided on the side of the dust bag away from the second connecting column, and a second convex strip connected to the second buckle is provided on the second air outlet.

5. The blowing-suction conversion structure for a blowing-suction fan according to claim 4, characterized in that: The dust collecting bag is detachably connected to the second connecting seat.

6. The blowing-suction conversion structure for a blowing-suction fan according to claim 1, characterized in that: The air inlet cover is provided with a first buckle, which is rotatably connected to the air inlet cover; the dust bag is provided with a second buckle, which is rotatably connected to the dust bag; the first buckle and the second buckle both include a dial knob, a rotating shaft, a torsion spring and a clamping head.

7. The blowing-suction conversion structure for a blowing-suction fan according to claim 1, characterized in that: A protrusion is provided on the side wall of the first air outlet, and the air duct is provided with a mounting groove matched with the protrusion. The protrusion cooperates with the mounting groove to realize a detachable connection between the first air outlet and the air duct.

8. A blowing and suction fan, characterized in that: The blowing-suction fan is provided with a blowing-suction conversion structure, and the blowing-suction conversion structure adopts a blowing-suction conversion structure for a blowing-suction fan as described in any one of claims 1-7.

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