CN115653915A - Telescopic blowing and sucking integrated fan - Google Patents

Abstract

The utility model provides a telescopic integrative fan of suction that blows, includes the casing, installs centrifugal motor and centrifugal fan blade in the casing, and centrifugal fan blade installs at the centrifugal intracavity, and centrifugal motor installs the rear side at centrifugal fan blade and is the drive connection, its characterized in that: the front side of the shell is provided with an air inlet and an air outlet, telescopic suction pipes and blowing pipes are correspondingly arranged in the air inlet and the air outlet to communicate with a centrifugal cavity, an air suction valve and a blowing valve are respectively arranged between the air inlet and the suction pipes and between the air outlet and the blowing pipes, the suction pipes and the blowing pipes are connected through a lever mechanism and realize cross expansion, so that the air inlet and the suction pipes and the air outlet and the blowing pipes are alternately in butt joint and separated, the air suction valve and the blowing valve are alternately opened and closed, and air holes capable of feeding air or discharging air are distributed at the upper end of the shell to communicate with a centrifugal cavity.

Description

Telescopic blowing and sucking integrated fan

Technical Field

The invention relates to a centrifugal fan, in particular to a telescopic blowing and sucking integrated fan which is used for inflating and exhausting an inflatable mattress, an inflatable sofa and the like.

Background

What the air mattress indicates is that has very strong pliability and elasticity, and the inflation volume becomes bigger after aerifing, its advantage: the inflatable bed has good elasticity, is comfortable to sleep and protects the body according to the requirement of the body supporting body type, has better feeling than a spring bed when sleeping, and is easy to move and carry for outdoor use. Before the inflatable mattress is used, the inflatable mattress needs to be inflated through an inflating device. Most of the existing inflation devices adopt a centrifugal fan, most of the existing inflation devices can only inflate and cannot deflate inflatable objects, so that the existing inflation devices generally adopt manual extrusion to deflate during deflation, are labor-consuming and cannot achieve the effect of full deflation.

The structure of the existing centrifugal fan is shown in fig. 1 and 2, a centrifugal fan blade 30 is driven by a motor 20 to rotate, air between blades is acted, the air is thrown to the periphery from the center of an impeller under the centrifugal action, and when fluid reaches the periphery of the impeller, the fluid is guided into an air outlet b to be discharged; the centrifugal fan 30 is driven by the motor 20 to rotate, so that air in the center of the impeller is thrown out at a high speed, low pressure is formed in the center of the impeller, and the air is continuously sucked into the air inlet a. Because centrifugal fan's theory of operation makes its air intake a fixed impeller center, and air outlet b is fixed to the impeller side, can't realize the business turn over freely and switch.

Through inspection, the battery type blowing-sucking fan in the Chinese patent CN200720048059.3 is provided with an air suction opening, an air blowing opening, a battery pack and the like, the battery is used as a power supply to drive the special structural design of an internal motor and fan blades to complete the functions of air suction, air blowing, motor cooling and the like, and the battery type blowing-sucking fan can provide a quick, convenient and efficient air source for products needing air filling under the condition of being far away from the power supply. This kind of fan is the same with foretell centrifugal fan, and the air intake is fixed at the impeller center, and the air outlet is fixed at the impeller side, can't realize the business turn over freely and switch.

Disclosure of Invention

The invention aims to solve the technical problem of providing a telescopic blowing and sucking integrated fan which is reasonable and compact in structure and can freely switch air inlet and outlet in view of the technical current situation.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a telescopic integrative fan of suction that blows, includes the casing, installs centrifugal motor and centrifugal fan blade in the casing, and centrifugal fan blade installs at the centrifugal intracavity, and centrifugal motor installs the rear side at centrifugal fan blade and is the drive connection, its characterized in that: the front side of the shell is provided with an air inlet and an air outlet, telescopic suction pipes and blow pipes communicated centrifugal cavities are correspondingly arranged in the air inlet and the air outlet, an air suction valve and a blow valve are respectively arranged between the air inlet and the suction pipes and between the air outlet and the blow pipes, the suction pipes and the blow pipes are connected through a lever mechanism and realize cross expansion, the air inlet and the suction pipes and the air outlet and the blow pipes are alternately and hermetically butted and separated, the air suction valve and the blow valve are alternately opened and closed, air holes capable of air inlet or air outlet are distributed in the upper end of the shell and communicated with the centrifugal cavities, when the suction pipes extend, the blow pipes retract, the air suction valves are opened, the blow valves are closed, air is sucked from the air inlet and then discharged from the air holes, when the blow pipes extend, the suction pipes retract, the blow valves are opened, the air suction valves are closed, and air is sucked from the air holes and then discharged from the air outlet.

As an improvement, the air inlet and the air outlet are arranged up and down, a fan support and a front cover which are involutory are arranged in the shell, a centrifugal cavity for placing a centrifugal fan blade is formed at the upper part of the front side of the fan support, the centrifugal fan blade is arranged in the centrifugal cavity and positioned by the front cover, the motor is arranged at the rear end of the fan support, an output shaft of the motor passes through the fan support to be connected with a central shaft hole of the centrifugal fan blade, and a certain gap is formed between the upper end and the lower end of the front cover and the inner wall of the shell after the front cover and the centrifugal fan blade support are positioned; the front end of protecgulum is equipped with inlet air channel and air-out passageway corresponding to the air intake of casing and the position arch of air outlet, and straw and blowpipe telescopic install in inlet air channel and air-out passageway, and centrifugal fan blade, motor and the coaxial setting of inlet air channel, induced draft valve and blowing valve install respectively in air intake and air outlet position, and the inner end of induced draft valve and blowing valve is connected with straw and blowpipe respectively.

Furthermore, the suction pipe and the blowpipe are short pipes matched with the inner diameters and the lengths of the air inlet channel and the air outlet channel respectively, the peripheries of the front ends of the suction pipe and the blowpipe are provided with expanding convex edges which are abutted against the front end parts of the air inlet channel and the air outlet channel, the lever mechanism comprises two levers arranged on the left side and the right side of the suction pipe and the blowpipe, the middle parts of the levers are rotatably connected with the front cover, the upper ends of the levers are rotatably connected with the suction pipe, and the lower ends of the levers are rotatably connected with the blowpipe.

Still further, the left and right sides of the front end middle part of the front cover is convexly provided with a positioning rod forwards, the front end of the positioning rod is convexly provided with a connecting shaft outwards, the middle part of the lever is provided with a corresponding connecting shaft hole, the left and right sides of the protruding edge of the front end of the suction pipe and the blowing pipe are respectively convexly provided with a short shaft, the upper end and the lower end of the lever are provided with corresponding shaft holes, and the suction pipe and the blowing pipe are rotatably connected with the lever through the matching of the short shaft and the shaft holes.

Furthermore, the casing is a rectangular cross section structure with an opening at the upper end, an upper cover is arranged at the upper opening of the casing in a folding manner, the air holes are arranged at the middle position of the upper cover, a sliding groove is formed in the front end of the upper cover corresponding to the upper part of the straw, and a push button capable of pushing the straw to stretch back and forth is arranged in the sliding groove.

And the sliding groove is a strip-shaped groove formed in the left-right direction, a concave edge for placing and sliding the push button is formed at the upper end of the sliding groove, clamping feet matched and connected with the bottom surface of the lower end of the sliding groove are convexly arranged on the front side and the rear side of the lower end of the push button, a protruding part is arranged above the convex edge at the front end of the suction pipe, a groove hole with the left end facing backwards and the right end facing forwards is formed in the upper end of the protruding part corresponding to the sliding groove, a protruding column is arranged in the middle of the lower end of the push button and inserted into the groove hole, when the push button is pushed leftwards, the suction pipe is driven to retract, under the action of a lever, the blowing pipe synchronously extends out, when the push button is pushed rightwards, the suction pipe is driven to extend out, and under the action of the lever, the blowing pipe synchronously retracts.

Furthermore, the inclination angle of the slot hole relative to the sliding chute is 30-40 degrees, a U-shaped seat with a front opening is convexly arranged on the front side of the upper end of the front cover, and the rectangular convex part at the upper end of the suction pipe is arranged in the U-shaped seat and can slide back and forth along the inner wall of the U-shaped seat.

Furthermore, the front end faces of the suction pipe and the blow pipe are provided with annular grooves for embedding the sealing rings, the inner sides of the air inlet and the air outlet of the shell are provided with corresponding annular bulges, and when the suction pipe or the blow pipe extends forwards, the sealing rings abut against the annular bulges for sealing.

Further, induced draft valve and blow the structure of valve unanimous, all include the valve, the valve is greater than the lid of air intake or air outlet for the size, the rear end of valve is equipped with the valve rod, the cover is equipped with the spring on the valve rod, the rear end of spring offsets with the jump ring on the valve rod, the front end of spring offsets with the air intake of casing or the retaining ring of air outlet department and supports, make the valve have the trend that backward motion is closed air intake or air outlet all the time, it contradicts the cooperation with the valve rod and realizes being connected to have a shelves spare in straw and the blowpipe.

Finally, the left and right sides of the upper opening inner wall of the shell are provided with buckles, the left and right sides of the upper cover are provided with corresponding buckle grooves, the upper cover is connected with the shell in a buckling mode, and the air holes are circularly distributed in the middle of the upper cover and located above the motor.

Compared with the prior art, the invention has the advantages that: adopt flexible blowing, the switching of business turn over wind is realized to the straw, install straw and blowpipe respectively in air intake and air outlet position, and install the lever between straw and blowpipe, the blowpipe indentation when making the straw stretch out, when the blowpipe stretches out, the straw indentation, set up the bleeder vent on the casing, when the straw stretches out, the blowpipe indentation, the valve that induced drafts is opened, the valve that blows is closed, the air is discharged from the bleeder vent after inhaling from the air intake, when the blowpipe stretches out, the straw indentation, the valve that blefts is opened, the valve that induced drafts is closed, the air is discharged from the air outlet after inhaling from the bleeder vent. The invention has reasonable and compact structure and convenient operation, solves the problem that the air inlet and the air outlet of the traditional centrifugal fan are fixed and can not be switched, ensures that the air inlet and the air outlet can be switched freely, is convenient for inflation and exhaust, and is suitable for popularization and application on inflatable products such as air cushion beds.

Drawings

FIG. 1 is a schematic structural diagram of a conventional centrifugal fan;

FIG. 2 is a cross-sectional view of a conventional centrifugal fan;

FIG. 3 is a cross-sectional view of an embodiment of the present invention in an insufflation state;

FIG. 4 is a cross-sectional view of an embodiment of the present invention in a suction state;

FIG. 5 is a top view of the embodiment of the present invention in operation transitioning from the insufflation condition to the inspiration condition;

FIG. 6 is a schematic view of the structure of FIG. 5 with the cover removed;

FIG. 7 is a schematic diagram of the configuration of the embodiment of the present invention during the transition from the blowing state to the suction state (with the housing removed);

FIG. 8 is a top view of the operation of the embodiment of the present invention in the air-breathing state to the air-blowing state;

FIG. 9 is a schematic view of the structure of FIG. 8 with the cover removed;

FIG. 10 is a schematic diagram of the configuration of the embodiment of the present invention during the transition from the insufflation state to the inspiration state (with the housing removed);

fig. 11 is an exploded view of an embodiment of the present invention.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

As shown in fig. 3 to 11, a retractable blowing and sucking integrated fan includes a housing 1, a centrifugal motor 2 and a centrifugal fan blade 3 installed in the housing 1, the centrifugal fan blade 3 is installed in a centrifugal cavity 81, the centrifugal motor 2 is installed at the rear side of the centrifugal fan blade 3 and is in driving connection, the centrifugal motor 2 is connected with and drives the centrifugal fan blade 3, an air inlet 11 and an air outlet 12 are opened at the front side of the housing 1, a retractable suction pipe 4 and a blowing pipe 5 are correspondingly installed in the air inlet 11 and the air outlet 12 to communicate with the centrifugal cavity 81, an air suction valve 6 and a blowing valve 7 are respectively installed between the air inlet 11 and the suction pipe 4 and between the air outlet 12 and the blowing pipe 5, the suction pipe 4 and the blowing pipe 5 are connected through a lever mechanism and are retracted in a cross manner, alternately sealed and abutted and separated between the air inlet 11 and the suction pipe 4 and between the air outlet 12 and the blowing pipe 5 are realized, the air suction valve 6 and the blowing valve 7 are alternately opened and closed, an air vent 101 capable of supplying air or exhausting is arranged at the upper end of the housing 1 to communicate with the centrifugal cavity 81, when the air suction pipe 4 is extended, the air suction valve 7 is opened, the air suction pipe 7 is exhausted from the air inlet 11, and the air outlet 7, and the air outlet is retracted from the air outlet 7, and the air outlet 7, when the air is retracted from the air suction pipe 4, and the air suction pipe 7, and the air outlet 7 is retracted from the air outlet 7, and the air suction valve 7.

The concrete structure is as follows: the casing 1 is a rectangular cross-section structure with an opening at the upper end, an upper cover 10 is arranged at the upper opening of the casing 1 in an involutive manner, air holes 101 are arranged in the middle position of the upper cover 10, an air inlet 11 and an air outlet 12 are vertically arranged at the front end of the casing 1, an involutive fan support 8 and a front cover 9 are arranged in the casing 1, a centrifugal cavity 81 for placing a centrifugal fan blade 3 is formed in the upper portion of the front side of the fan support 8, the centrifugal fan blade 3 is arranged in the centrifugal cavity 81 and positioned through the front cover 9, a centrifugal motor 2 is arranged at the rear end of the fan support 8, an output shaft of the centrifugal motor 2 penetrates through the fan support 8 to be connected with a central shaft hole of the centrifugal fan blade 3, a certain gap is formed between the upper end and the lower end of the front cover 9 and the fan blade support 8 after the front cover and the fan blade support 8 are positioned, and the inner wall of the casing 1, and the air holes 101 and the centrifugal cavity 81 are convenient to communicate. The front end of the front cover 9 corresponds to the positions of the air inlet 11 and the air outlet 12 of the shell 1 and is convexly provided with an air inlet channel 91 and an air outlet channel 92, the suction pipe 4 and the blowing pipe 5 are telescopically arranged in the air inlet channel 91 and the air outlet channel 92, the centrifugal fan blade 3 and the centrifugal motor 2 are coaxially arranged with the air inlet channel 91, the air suction valve 6 and the air blowing valve 7 are respectively arranged at the positions of the air inlet 11 and the air outlet 12, and the inner ends of the air suction valve 6 and the air blowing valve 7 are respectively connected with the suction pipe 4 and the blowing pipe 5. The suction pipe 4 and the blowing pipe 5 are respectively round short pipes matched with the inner diameters and the lengths of the air inlet channel 91 and the air outlet channel 92, and the peripheries of the front ends of the suction pipe 4 and the blowing pipe 5 are provided with expanding convex edges which are abutted against the front ends of the air inlet channel 91 and the air outlet channel 92. The lever mechanism comprises two levers 30 arranged on the left side and the right side of the suction pipe 4 and the blow pipe 5, the middle part of the lever 30 is rotatably connected with the front cover 9, the upper end of the lever 30 is rotatably connected with the suction pipe 4, and the lower end of the lever 30 is rotatably connected with the blow pipe 5. The concrete connection structure is as follows: the left and right sides of the middle part of the front end of the front cover 9 are convexly provided with positioning rods 93 forwards, the front ends of the positioning rods 93 are convexly provided with connecting shafts 94 outwards, the middle part of the lever 30 is provided with corresponding connecting shaft holes 301, the left and right sides of the protruding edge of the front end of the suction pipe 4 and the blowing pipe 5 are convexly provided with short shafts 43 and 51 respectively, the upper end and the lower end of the lever 30 are provided with corresponding shaft holes 302, the suction pipe 4 and the blowing pipe 5 are rotatably connected with the lever 30 through the matching of the short shafts 43 and 51 and the shaft holes 302, and the front and the back stretching is realized along with the rotation of the lever 30.

The front end of the upper cover 10 is provided with a sliding groove 102 corresponding to the upper part of the straw 4, the sliding groove 102 is internally provided with a push button 20 capable of pushing the straw 4 to stretch back and forth, the sliding groove 102 is a strip-shaped groove arranged in the left-right direction, the upper end of the sliding groove 102 is provided with a concave edge for the push button 20 to be placed and slide, the front side and the back side of the lower end of the push button 20 are convexly provided with clamping feet 201 matched and connected with the bottom surface of the lower end of the sliding groove 102, a hollow rectangular section convex part 41 is arranged above the convex edge of the front end of the straw 4, the upper end surface of the convex part 41 is abutted against the upper cover 10, the upper end of the convex part 41 is provided with a slotted hole 42 with the left end facing back and the right end facing front corresponding to the position of the sliding groove 102, the slotted hole 42 has an inclination angle of 30-40 degrees relative to the sliding groove 102, the middle part of the lower end of the push button 20 is provided with a convex column 202 inserted in the slotted hole 42, when the push button 20 is pushed leftwards, the straw 4 is driven to retract, under the action of the lever 30, the blow pipe 5 synchronously extends, when the push button 20 pushes rightwards, the push button 20, the blow pipe 4 is driven to extend rightwards, and the blow pipe 5 retracts synchronously under the action of the lever 30.

The front side of the upper end of the front cover 9 is provided with a U-shaped seat 95 with a front opening in a convex manner, and the upper end convex part 41 of the suction pipe 4 is arranged in the U-shaped seat 95 and can slide back and forth along the inner wall of the U-shaped seat 95. The front end surfaces of the suction pipe 4 and the blow pipe 5 are formed with annular grooves 44 and 52 for the sealing ring 40 to be embedded in, and the inner sides of the air inlet 11 and the air outlet 12 of the shell 1 are provided with corresponding annular protrusions 14, so that when the suction pipe 4 or the blow pipe 5 extends forwards, the sealing ring 40 and the annular protrusions 14 are abutted and sealed.

The structure of the air suction valve 6 is consistent with that of the air blowing valve 7, the air suction valve and the air blowing valve are both composed of a valve 61, the valve 61 is a circular cover with the size larger than the air inlet 11 or the air outlet 12, a valve rod 62 is arranged at the rear end of the valve 61, a spring 63 is sleeved on the valve rod 62, the rear end of the spring 63 abuts against a snap spring on the valve rod 62, the front end of the spring 63 abuts against a check ring at the air inlet 11 or the air outlet 12 of the shell 1, and the valve 61 is enabled to have the trend of being moved backwards all the time to close the air inlet 11 or the air outlet 12. The suction tube 4 and the blow tube 5 have stops therein which engage the valve stem 62 in an interference fit.

The left and right sides of the inner wall of the upper opening of the shell are provided with buckles 13, the left and right sides of the upper cover 10 are provided with corresponding buckle grooves 103, the upper cover 10 is connected with the shell 1 in a buckling mode, and the air holes 101 are circularly distributed in the middle of the upper cover 10 and above the motor 2.

The working principle is as follows:

when the inflatable mattress needs to be inflated, the push button 20 is pushed to move to the right, as shown in fig. 5, the lower end convex column 202 of the push button 20 slides to the right along the slot 42, as shown in fig. 6, the suction pipe 4 is driven to extend outwards, the air inlet 11 is communicated with the centrifugal cavity 81, the blow pipe 5 is driven to retract through the rotation of the lever 30 and is separated from the air outlet 12, the centrifugal cavity 81 is communicated with the air vent 101 through a lower gap, as shown in fig. 7, air is sucked from the air inlet 11 and then is exhausted from the air vent 101, as shown in fig. 4.

When the air is required to be pumped out from the inflatable mattress, the push button 20 is pushed to move leftwards, as shown in fig. 8, the convex column 202 at the lower end of the push button 20 slides leftwards along the slot 42, as shown in fig. 9, the suction pipe 4 is driven to retract inwards to be separated from the air outlet 11, the centrifugal cavity 81 is communicated with the air vent 101 through the upper gap, the blow pipe 5 is driven to extend out through the rotation of the lever 30, the air outlet 12 is communicated with the centrifugal cavity 81, as shown in fig. 10, air is sucked from the air vent 101 and then is exhausted from the air outlet 12, as shown in fig. 3.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. The utility model provides a telescopic integrative fan of suction that blows, includes the casing, installs centrifugal motor and centrifugal fan blade in the casing, and centrifugal fan blade installs at the centrifugal intracavity, and centrifugal motor installs the rear side at centrifugal fan blade and is the drive connection, its characterized in that: the front side of the shell is provided with an air inlet and an air outlet, telescopic suction pipes and blow pipes communicated centrifugal cavities are correspondingly arranged in the air inlet and the air outlet, an air suction valve and a blow valve are respectively arranged between the air inlet and the suction pipes and between the air outlet and the blow pipes, the suction pipes and the blow pipes are connected through a lever mechanism and realize cross expansion, the air inlet and the suction pipes and the air outlet and the blow pipes are alternately and hermetically butted and separated, the air suction valve and the blow valve are alternately opened and closed, air holes capable of air inlet or air outlet are distributed in the upper end of the shell and communicated with the centrifugal cavities, when the suction pipes extend, the blow pipes retract, the air suction valves are opened, the blow valves are closed, air is sucked from the air inlet and then discharged from the air holes, when the blow pipes extend, the suction pipes retract, the blow valves are opened, the air suction valves are closed, and air is sucked from the air holes and then discharged from the air outlet.

2. The telescopic blowing and sucking integrated fan according to claim 1, characterized in that: the centrifugal fan blade is arranged in the centrifugal cavity and positioned by the front cover, the motor is arranged at the rear end of the fan support, an output shaft of the centrifugal motor passes through the fan support to be connected with a central shaft hole of the centrifugal fan blade, and a certain gap is formed between the upper end and the lower end of the front cover and the inner wall of the shell after the front cover and the fan blade support are positioned; the front end of protecgulum is protruding to be equipped with inlet air channel and air-out passageway corresponding to the position of the air intake of casing and air outlet, and straw and blowpipe telescopic install in inlet air channel and air-out passageway, and centrifugal fan blade, centrifugal motor and the coaxial setting of inlet air channel, the valve of induced drafting and the valve of blowing are installed respectively in air intake and air outlet position, and the inner end of valve of induced drafting and the valve of blowing is connected with straw and blowpipe respectively.

3. The telescopic blowing and sucking integrated fan according to claim 2, characterized in that: the suction pipe and the blowpipe are short pipes matched with the inner diameters and the lengths of the air inlet channel and the air outlet channel respectively, the peripheries of the front ends of the suction pipe and the blowpipe are provided with expanding convex edges which are abutted against the front end parts of the air inlet channel and the air outlet channel, the lever mechanism comprises two levers arranged on the left side and the right side of the suction pipe and the blowpipe, the middle parts of the levers are rotatably connected with the front cover, the upper ends of the levers are rotatably connected with the suction pipe, and the lower ends of the levers are rotatably connected with the blowpipe.

4. The telescopic blowing and sucking integrated fan according to claim 3, characterized in that: the left and right sides of the middle part of the front end of the front cover are convexly provided with positioning rods forwards, the front ends of the positioning rods are convexly provided with connecting shafts outwards, the middle parts of the levers are provided with corresponding connecting shaft holes, the left and right sides of the protruding edges of the front ends of the suction pipe and the blowing pipe are respectively convexly provided with short shafts, the upper and lower ends of the levers are provided with corresponding shaft holes, and the suction pipe and the blowing pipe are rotatably connected with the levers through the matching of the short shafts and the shaft holes.

5. The telescopic blowing and sucking integrated fan according to claim 4, characterized in that: the casing is the rectangular cross section structure of upper end open-ended, and the upper shed department at the casing is to closing and is equipped with the upper cover, and the bleeder vent is laid at the middle part position of upper cover, and the front end of upper cover is seted up a spout corresponding to the top of straw, is equipped with the button that pushes away that can promote the straw and stretch out and draw back in the spout.

6. The telescopic blowing and sucking integrated fan according to claim 5, characterized in that: the improved straw blowing device is characterized in that the sliding groove is a strip-shaped groove formed in the left-right direction, a concave edge for placing and sliding the push button is formed in the upper end of the sliding groove, clamping feet matched and connected with the bottom surface of the lower end of the sliding groove are convexly arranged on the front side and the rear side of the lower end of the push button, a protruding portion is arranged above the protruding edge of the front end of the straw, a slotted hole with the left end facing backwards and the right end facing forwards is formed in the upper end of the protruding portion corresponding to the sliding groove, a protruding column is arranged in the middle of the lower end of the push button and is inserted into the slotted hole, the straw is driven to retract when the push button is pushed leftwards, the blowing pipe synchronously extends out under the action of a lever, the straw is driven to extend out when the push button is pushed rightwards, and the blowing pipe synchronously retracts under the action of the lever.

7. The telescopic blowing and sucking integrated fan according to claim 6, characterized in that: the inclined angle of the groove hole relative to the sliding chute is 30-40 degrees, a U-shaped seat with a front opening is convexly arranged on the front side of the upper end of the front cover, and the upper end bulge of the suction pipe is arranged in the U-shaped seat and can slide back and forth along the inner wall of the U-shaped seat.

8. The telescopic blowing and sucking integrated fan according to any one of claims 1 to 7, characterized in that: the front end surfaces of the suction pipe and the blow pipe are provided with annular grooves for embedding the sealing rings, the inner sides of the air inlet and the air outlet of the shell are provided with corresponding annular bulges, and when the suction pipe or the blow pipe extends forwards, the suction pipe or the blow pipe is propped against the annular bulges through the sealing rings for sealing.

9. The telescopic blowing and sucking integrated fan according to any one of claims 1 to 7, characterized in that: the structure of induced draft valve and valve that blows is unanimous, all includes the valve, and the valve is greater than the lid of air intake or air outlet for the size, and the rear end of valve is equipped with the valve rod, and the cover is equipped with the spring on the valve rod, and the rear end of spring offsets with the jump ring on the valve rod, and the front end of spring offsets with the air intake of casing or the retaining ring of air outlet department and supports, makes the valve have the trend that backward motion is closed air intake or air outlet all the time, has the shelves spare in straw and the blowpipe and contradicts the cooperation with the valve rod and realize being connected.

10. The telescopic blowing and sucking integrated fan according to any one of claims 5 to 7, characterized in that: the left and right sides of the upper opening inner wall of the shell is provided with buckles, the left and right sides of the upper cover are provided with corresponding buckle grooves, the upper cover is connected with the shell in a buckling mode, and the air holes are circularly distributed in the middle of the upper cover and above the motor.

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