CN112855617A

CN112855617A - Fan

Info

Publication number: CN112855617A
Application number: CN202110113582.4A
Authority: CN
Inventors: 任天颂; 任海伟
Original assignee: Shandong Yatong Technology Group Co ltd
Current assignee: Shandong Yatong Technology Group Co ltd
Priority date: 2021-01-27
Filing date: 2021-01-27
Publication date: 2021-05-28
Anticipated expiration: 2041-01-27
Also published as: CN112855617B

Abstract

The invention provides a fan, and belongs to the technical field of fan equipment. The technical scheme is as follows: a fan comprises a fan shell and a fan body arranged inside the fan shell, and is characterized in that the fan shell comprises an inner frame body and an outer frame body, and the fan body is arranged on the inner frame body; the outer frame body is provided with a plurality of mounting assemblies; the mounting assembly comprises a barrel, a combustion chamber is arranged in the barrel, combustible materials which are combusted to generate a large amount of gas are arranged in the combustion chamber, a first cylindrical connecting piece is arranged at one end, close to the outer frame, in the barrel, a sealed space is formed between the first cylindrical connecting piece and the combustion chamber, the combustible materials are combusted, and the first cylindrical connecting piece can penetrate through the outer frame under the action of gas and stretch into the wall. The invention has the beneficial effects that: the fan is convenient to install and can avoid drilling holes on the surface of the wall body by using a drill bit.

Description

Fan

Technical Field

The invention relates to the technical field of fan equipment, in particular to a fan.

Background

The motor and the blades of the axial flow fan are arranged in the shell, are used for local ventilation, have obvious ventilation effect and safety, can be used in places needing ventilation, such as metallurgy, chemical engineering light industry, food factories, office buildings, houses and the like, and have the characteristics of simple structure, stability, reliability and wide function selection range. However, the existing axial flow fan still has shortcomings when in use, the appearance of the axial flow fan is simple, when the axial flow fan is installed, holes need to be drilled on the surface of a wall body through a drill bit, then the axial flow fan is fixed by a plurality of bolts, and the installation process is complex and inconvenient to operate.

Disclosure of Invention

The invention aims to provide a fan which is convenient to install and can avoid drilling holes on the surface of a wall body by using a drill bit.

The invention is realized by the following measures: a fan comprises a fan shell and a fan body arranged inside the fan shell, and is characterized in that the fan shell comprises an inner frame body and an outer frame body, and the fan body is arranged on the inner frame body;

the outer frame body is provided with a plurality of mounting assemblies; the mounting assemblies are preferably symmetrically arranged and can be arranged at four corners of the outer frame body, and the specific number can be determined according to actual conditions.

The mounting assembly comprises a barrel, a combustion chamber is arranged in the barrel, combustible materials which are combusted to generate a large amount of gas are arranged in the combustion chamber, a first cylindrical connecting piece is arranged at one end, close to the outer frame, in the barrel, a sealed space is formed between the first cylindrical connecting piece and the combustion chamber, the combustible materials are combusted, and the first cylindrical connecting piece can penetrate through the outer frame under the action of gas and stretch into the wall.

The combustible material can adopt explosive or gunpowder, and a large amount of heat and gas can be generated in a short time through the rapid combustion or decomposition of the explosive or gunpowder, so that the movement of pushing the cylindrical connecting piece is realized.

The utility model discloses a combustible combustion device, including barrel, cylinder connecting piece, cavity pipeline, cavity connecting piece two, combustible combustion, cylinder connecting piece one can pass under gaseous effect in the wall body is stretched into to the outside frame body, and gaseous warp the exhaust hole is used in the effect on the cylinder connecting piece two, cylinder connecting piece two is squeezed into under gaseous effect in the inside concentric ring plate that is provided with, the setting of cylinder connecting piece one is in the ring plate, ring plate is close to be provided with a plurality of exhaust hole on the one end lateral wall of outside frame body, the outside of barrel with the position that the exhaust hole corresponds is provided with the annular cover body, the symmetry is provided with the cavity pipeline on the annular cover body, be provided with cylinder connecting piece two in the cavity pipeline.

The barrel is close to it is provided with U type spare to rotate on the one end outer wall of inner frame body, the both ends outside of U type spare is provided with the connecting plate, set up on the connecting plate with two complex locating holes of cylindricality connecting piece, the internal diameter of locating hole slightly is less than the external diameter of cylindricality connecting piece two, be provided with the limiting plate on the outer wall of inner frame body perpendicularly, the connecting plate with the limiting plate contact, cylindricality connecting piece two can pass the locating hole.

The contact surface of the connecting plate and the limiting plate is provided with a pressure sensor, and the pressure sensor and an igniter arranged in the combustion chamber form an ignition control loop.

The U-shaped piece is limited through the torsion spring, so that the U-shaped piece is not in contact with the limiting plate under the condition of not receiving external force, and a pull rope is arranged on the U-shaped piece and extends out of the fan shell.

The inner wall of the inner frame body is provided with a positioning plate through a spring, the positioning plate is provided with a positioning column, and the positioning column extends out of the inner frame body to limit the U-shaped part.

An inner barrel is concentrically arranged inside the barrel, the first cylindrical connecting piece is arranged in the inner barrel, a plurality of exhaust holes are formed in the side wall of one end, close to the outer frame body, of the inner barrel, and an annular air passage is formed between the inner barrel and the barrel;

the barrel is close to the outer wall of one end of the inner frame body, a connecting column with a hollow air passage is arranged on the outer wall of the end, a second cylindrical connecting piece is arranged in the connecting column, the end face of the connecting column is in contact with the end face of the barrel, the annular air passage is communicated with the hollow air passage, and the second cylindrical connecting piece is driven into the inner frame body under the action of gas.

An external column is vertically arranged on the outer wall of the connecting column, an auxiliary air passage communicated with the hollow air passage is arranged on the external column, a third cylindrical connecting piece is arranged in the auxiliary air passage, a blind hole communicated with the auxiliary air passage is concentrically arranged on the third cylindrical connecting piece, and a baffle plate of the third cylindrical connecting piece is arranged at the outer end of the auxiliary air passage;

be provided with the mounting in the inside frame body, be provided with on the mounting with three complex through-holes of cylindricality connecting piece, cylindricality connecting piece is three stretches out be provided with a plurality of bar mouth on the lateral wall of mounting and extension, the terminal surface of spliced pole with the end face contact of barrel, annular air flue with cavity air flue intercommunication, cylindricality connecting piece two is squeezed into under gaseous effect in the inside frame body, supplementary air flue with cavity air flue intercommunication, cylindricality connecting piece tribit is in bar mouth department warp and fixes on the mounting.

The connecting column with the contact surface of barrel is provided with pressure sensor, pressure sensor and setting are in the some firearm formation ignition control circuit in the combustion chamber.

The connecting column is limited through the torsion spring, so that the connecting column is not in contact with the barrel under the condition of not receiving external force, and stay ropes are arranged on the connecting column and the third cylindrical connecting piece and extend out of the fan shell.

Still including setting up the guard plate of outside framework one end, set up on the guard plate with the tuber pipe of inside rectangle intercommunication.

The utility model discloses a wall body, including the wall body, the wall body is outside, the tuber pipe interpolation has external tuber pipe, the outer end of external tuber pipe is provided with the protection network, the protection network sets up the wall body is outside.

The air-conditioning device is characterized in that an annular groove is formed in the inner end of the external air pipe, an annular air bag is arranged in the annular groove, a plurality of annular limiting grooves matched with the annular air bag are axially and uniformly distributed on the inner wall of the air pipe, the external air pipe is abutted to the annular limiting grooves through the inflated annular air bag, and an air valve is arranged on the annular air bag.

The igniter can be used in the prior art and is not described in detail herein. The first cylindrical connecting piece and the second cylindrical connecting piece can be steel nails, and the material of the technical characteristics and the sealing of the connecting part between the technical characteristics in the application all need to meet the use requirements of gunpowder and explosive.

The first cylindrical connecting piece, the second cylindrical connecting piece and the third cylindrical connecting piece can be fixed by self friction force or limited by spring pins. The first cylindrical connecting piece, the second cylindrical connecting piece and the third cylindrical connecting piece are all structures with one large end and the other small end, and the small ends are extending ends.

Compared with the prior art, the invention has the beneficial effects that: the fan is convenient to install and can avoid drilling holes on the surface of the wall body by using a drill bit; through the rapid combustion or decomposition of the explosive or gunpowder, a large amount of heat and gas are generated in a short time, so that the movement of the cylindrical connecting pieces is pushed, a plurality of cylindrical connecting pieces are arranged, one driven wall is connected with the wall, and one driven fan shell is connected with the fan shell; the trigger of the igniter can be realized by pulling the pull rope, and the operation is convenient.

Drawings

Fig. 1 is a schematic overall structure diagram of a first embodiment of the present invention.

Fig. 2 is a schematic internal structure diagram according to a first embodiment of the present invention.

Fig. 3 is a partially enlarged view of a portion a in fig. 2.

Fig. 4 is a partially enlarged view of fig. 2 at B.

Fig. 5 is a schematic structural diagram of a mounting assembly according to an embodiment of the invention.

FIG. 6 is a cross-sectional view of a mounting assembly in accordance with one embodiment of the present invention.

Fig. 7 is a disassembled view of the first embodiment of the present invention.

Fig. 8 is a partial enlarged view at C in fig. 7.

Fig. 9 is a reference diagram of a usage status according to a first embodiment of the invention.

Fig. 10 is a schematic structural diagram of the second embodiment.

Fig. 11 is a front view of the second embodiment.

Fig. 12 is a cross-sectional view taken at a-a in fig. 12.

Fig. 13 is a partial schematic view of the second embodiment.

Fig. 14 is a schematic structural view of a third cylindrical connecting member.

Fig. 15 is a reference diagram of the use state of the second embodiment.

Wherein the reference numerals are: 1. an inner frame body; 2. an outer frame; 3. a fan body; 4. a protection plate; 5. an air duct; 6. mounting the component; 7. an annular air bag; 8. an external wind pipe; 401. an annular limiting groove; 601. a barrel; 602. a first cylindrical connecting piece; 603. a combustion chamber; 604. a combustible; 605. an igniter; 606. a spring pin; 607. a U-shaped member; 608. a connecting plate; 609. an annular plate; 610. an exhaust hole; 611. an annular cover body; 612. a hollow conduit; 613. a second cylindrical connecting piece; 614. a pull rope hook; 615. a pressure sensor; 616. a limiting plate; 617. positioning holes; 618. a positioning column; 619. positioning a plate; 620. an annular air passage; 621. a hollow air passage; 622. a third cylindrical connecting piece; 623. blind holes; 624. a strip-shaped opening; 625. a fixing plate; 626. a fixing member; 627. externally connecting a column; 628. the column shape is connected with three hooks; 629. a rope outlet; 630. an inner cylinder; 631. an auxiliary airway; 632. connecting columns; .

Detailed Description

In order to clearly illustrate the technical features of the present solution, the present solution is explained below by way of specific embodiments.

The first embodiment is as follows:

referring to fig. 1 to 9, a blower fan comprises a blower fan shell and a blower fan body 3 arranged inside the blower fan shell, wherein the blower fan shell comprises an inner frame 1 and an outer frame 2, and the blower fan body 3 is arranged on the inner frame 1;

the outer frame body 2 is provided with a plurality of mounting assemblies 6; the mounting assemblies 6 are preferably symmetrically arranged, and can be mounted at four corners of the outer frame 2, or at the middle position of each side, and the specific number can be determined according to the actual situation.

The mounting assembly 6 comprises a cylinder 601, a combustion chamber 603 is arranged in the cylinder 601, a combustible material 604 which generates a large amount of gas through combustion is arranged in the combustion chamber 603, a first cylindrical connecting piece 602 is arranged at one end, close to the outer frame 2, in the cylinder 601, a sealed space is formed between the first cylindrical connecting piece 602 and the combustion chamber 603, the combustible material 604 is combusted, and the first cylindrical connecting piece 602 can penetrate through the outer frame 2 and extend into the wall under the action of the gas. In order to facilitate the driving of the first cylindrical connecting member 602 into the wall, a through hole with an inner diameter smaller than the outer diameter of the first cylindrical connecting member 602 may be reserved on the outer frame 2.

The combustible 604 may be explosive or gunpowder, and a large amount of heat and gas can be generated in a short time by the explosive or gunpowder being rapidly combusted or decomposed, so that the movement for pushing the cylindrical connecting member is realized.

The cylinder 601 is internally concentrically provided with an annular plate 609, a first cylindrical connecting piece 602 is arranged in the annular plate 609, a plurality of exhaust holes 610 are formed in the side wall of one end, close to the outer frame 2, of the annular plate 609, an annular cover body 611 is arranged on the outer portion of the cylinder 601 and corresponds to the exhaust holes 610, hollow pipelines 612 are symmetrically arranged on the annular cover body 611, a second cylindrical connecting piece 613 is arranged in the hollow pipelines 612, combustible 604 burns, the first cylindrical connecting piece 602 can penetrate through the outer frame 2 and extend into a wall body under the action of gas, the gas acts on the second cylindrical connecting piece 613 through the exhaust holes 610, and the second cylindrical connecting piece 613 is driven into the inner frame 1 under the action of the gas. In order to facilitate the driving of the second cylindrical connecting member 613 into the inner frame 1, a through hole with an inner diameter smaller than the outer diameter of the second cylindrical connecting member 613 may be reserved in the inner frame 1.

The outer wall of one end, close to the inner frame 1, of the cylinder 601 is rotatably provided with a U-shaped part 607, the outer sides of two ends of the U-shaped part 607 are provided with connecting plates 608, the connecting plates 608 are provided with positioning holes 617 matched with the second cylindrical connecting part 613, the inner diameter of the positioning holes 617 is slightly smaller than the outer diameter of the second cylindrical connecting part 613, the outer wall of the inner frame 1 is vertically provided with a limiting plate 616, the connecting plates 608 are in contact with the limiting plate 616, and the second cylindrical connecting part 613 can penetrate.

The contact surface of the connection plate 608 and the limit plate 616 is provided with a pressure sensor 615, and the pressure sensor 615 and an igniter 605 provided in the combustion chamber 603 form an ignition control circuit. The igniter 605 is connected to ignite after the pressure sensor 615 is pressed, and the combustible 604 is ignited instantaneously.

The U-shaped piece 607 is limited by the torsion spring, so that the U-shaped piece 607 is not in contact with the limiting plate 616 under the condition of no external force, the U-shaped piece 607 is provided with a pull rope hook 614, the pull rope extends out of the fan shell, and the fan shell is provided with a rope outlet 629.

Be provided with locating plate 619 through the spring on the inner wall of inside framework 1, be provided with reference column 618 on locating plate 619, reference column 618 stretches out inside framework 1 and carries on spacingly to U type spare 607, can further prescribe a limit to the position of U type spare 607 like this, prevents the spurious triggering of some firearm 605.

The use method comprises the following steps: the inner frame 1 and the outer frame 2 may be integrally provided, or may be detachably connected by welding or bolts. The outer frame body 2 is placed in a reserved hole or a formed hole of a wall body, after the position is determined, the pull rope is pulled to overcome the force of a torsion spring, the U-shaped piece 607 rotates, the U-shaped piece 607 ejects out the limiting column 618 in the rotating process, the connecting plate 608 is in contact with the limiting plate 616, the pressure sensor 615 is triggered, the igniter 605 is electrified and ignited, combustible materials are combusted to generate high-pressure gas, the gas pushes the first cylindrical connecting piece 602 to move rapidly and penetrate through the outer frame body 2 to be driven into the wall body, after the first cylindrical connecting piece 602 slightly penetrates through the exhaust hole 610, the gas enters the annular cover body 611 and the hollow pipeline 612 through the exhaust hole 610 to push the second cylindrical connecting piece 613 to move rapidly and drive the second cylindrical connecting piece 613 to the inner frame body 1.

Example two:

referring to fig. 10 to 14, a blower fan comprises a blower fan shell and a blower fan body 3 arranged inside the blower fan shell, wherein the blower fan shell comprises an inner frame 1 and an outer frame 2, and the blower fan body 3 is arranged on the inner frame 1;

the outer frame body 2 is provided with a plurality of mounting assemblies 6; the mounting assemblies 6 are preferably symmetrically arranged, and can be mounted at four corners of the outer frame 2, and the specific number can be determined according to actual conditions.

An inner cylinder 630 is concentrically arranged in the cylinder 601, a first cylindrical connecting piece 602 is arranged in the inner cylinder 630, a plurality of exhaust holes 610 are formed in the side wall of one end, close to the outer frame 2, of the inner cylinder 630, and an annular air passage 620 is formed between the inner cylinder 630 and the cylinder 601;

a connecting column 632 with a hollow air passage 621 is rotatably arranged on the outer wall of one end of the cylinder body 601 close to the inner frame body 1, a second cylindrical connecting piece 613 is arranged in the connecting column 632, the end face of the connecting column 632 is in contact with the end face of the cylinder body 601, the annular air passage 620 is communicated with the hollow air passage 621, and the second cylindrical connecting piece 613 is driven into the inner frame body 1 under the action of gas.

An outer column 627 is vertically arranged on the outer wall of the connecting column 632, the outer column 627 is provided with an auxiliary air passage 631 communicated with the hollow air passage 621, a cylindrical connecting piece III 622 is arranged in the auxiliary air passage 631, a blind hole 623 communicated with the auxiliary air passage 631 is concentrically arranged on the cylindrical connecting piece III 622, and a baffle of the cylindrical connecting piece III 622 is arranged at the outer end of the auxiliary air passage 631;

be provided with mounting 626 on the inside frame 1, be provided with the through-hole with the three 622 complex of cylindricality connecting piece on the mounting 626, cylindricality connecting piece three 622 stretches out mounting 626 and is provided with a plurality of bar mouth 624 on the lateral wall of extension, the terminal surface of spliced pole 632 contacts with the terminal surface of barrel 601, annular air flue 620 and hollow air flue 621 intercommunication, on the inside frame 1 is squeezed into to cylindricality connecting piece two 613 under the effect of gas, supplementary air flue 631 and hollow air flue 621 intercommunication, cylindricality connecting piece three 622 is located bar mouth 624 department and is out of shape and fix on mounting 626. The inner frame 1 is provided with a fixing plate 625 engaged with the second cylindrical connector 613.

The contact surface of the connecting column 632 and the cylinder 601 is provided with a pressure sensor, and the pressure sensor and an igniter 605 arranged in the combustion chamber 603 form an ignition control circuit.

Spliced pole 632 carries on spacingly through the torsional spring, guarantees not receiving under the circumstances of external force, not with barrel 601 contact, all is provided with the stay cord on spliced pole 601 and the three 622 of cylindricality connecting piece, and the stay cord stretches out the fan casing, is provided with out rope mouth 629 on the fan casing, is provided with three couples 628 of cylindricality connecting piece on the three 622 of cylindricality connecting piece, also is provided with the couple on spliced pole 601.

The use method comprises the following steps: the inner frame body 1 and the outer frame body 2 are two independent pieces, the outer frame body 2 is placed in a reserved hole or a formed hole of a wall body, after the position is determined, the inner frame body of the fan is installed at a designated position of the outer frame body, a pull rope on a cylindrical connecting column III 622 is pulled, the outer end of the cylindrical connecting column III 622 enters a through hole of a fixing piece 626, the strip-shaped opening 624 is ensured to be positioned at the outer side 628 of the fixing piece, then the pull rope on the connecting column 632 is pulled to overcome the force of a torsion spring, the connecting column 632 rotates, the connecting column 632 is in contact with a cylinder body 601, an annular air passage 620 is communicated with a hollow air passage 621, a pressure sensor is triggered, an igniter 605 is electrified to ignite, combustible substances are combusted to generate high-pressure gas, the gas pushes a cylindrical connecting piece I602 to move rapidly and penetrates through the outer frame body 2 to be driven into the wall body, when the, the second cylindrical connecting piece 613 is pushed to move rapidly, the second cylindrical connecting piece 613 is driven into the fixing plate 625, after the second cylindrical connecting piece 613 skips over the auxiliary air channel 631, the auxiliary air channel 631 is communicated with the hollow air channel 621 and enters the blind hole 623, the auxiliary air channel is discharged from the strip-shaped opening 624 and explodes the strip-shaped opening 624 to realize deformation, and then the fixing on the fixing piece 626 is realized.

Example three:

referring to fig. 7 and 8, on the basis of the first or second embodiment, the air conditioner further includes a protection plate 4 disposed at one end of the outer frame 2, and the protection plate 4 is provided with an air duct communicated with the inner rectangle 1.

An external air pipe 8 is inserted in the air pipe 5, a protective net is arranged at the outer end of the external air pipe 8, and the protective net is arranged outside the wall body.

The inner of external tuber pipe 8 is provided with the ring channel, is provided with annular gasbag 7 in the ring channel, and the axial equipartition has a plurality of and annular gasbag 7 complex annular spacing groove 401 on the inner wall of tuber pipe 5, and external tuber pipe 8 is provided with the pneumatic valve on the annular gasbag 7 through the annular gasbag 7 top after aerifing in annular spacing groove 401.

It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which are merely for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.

In the description of the invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "disposed" are to be construed broadly, e.g. as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.

The technical features of the present invention which are not described in the above embodiments may be implemented by or using the prior art, and are not described herein again, of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and variations, modifications, additions or substitutions which may be made by those skilled in the art within the spirit and scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A fan comprises a fan shell and a fan body arranged inside the fan shell, and is characterized in that the fan shell comprises an inner frame body and an outer frame body, and the fan body is arranged on the inner frame body;

the outer frame body is provided with a plurality of mounting assemblies;

2. The fan according to claim 1, wherein an annular plate is concentrically arranged inside the cylinder, the first cylindrical connecting piece is arranged inside the annular plate, a plurality of exhaust holes are formed in one end side wall, close to the outer frame, of the annular plate, an annular cover body is arranged outside the cylinder and corresponds to the exhaust holes, hollow pipelines are symmetrically arranged on the annular cover body, a second cylindrical connecting piece is arranged inside the hollow pipelines, the combustible is combusted, the first cylindrical connecting piece can penetrate through the outer frame and extend into the wall body under the action of gas, the gas acts on the second cylindrical connecting piece through the exhaust holes, and the second cylindrical connecting piece is driven into the inner frame under the action of the gas.

3. The fan according to claim 2, wherein a U-shaped part is rotatably arranged on the outer wall of one end, close to the inner frame body, of the barrel, connecting plates are arranged on the outer sides of two ends of the U-shaped part, positioning holes matched with the second cylindrical connecting parts are formed in the connecting plates, the inner diameters of the positioning holes are slightly smaller than the outer diameters of the second cylindrical connecting parts, limiting plates are vertically arranged on the outer wall of the inner frame body, the connecting plates are in contact with the limiting plates, and the second cylindrical connecting parts can penetrate through the positioning holes.

4. The fan according to claim 3, wherein a pressure sensor is arranged on a contact surface of the connecting plate and the limiting plate, and the pressure sensor and an igniter arranged in the combustion chamber form an ignition control loop.

5. The blower of claim 4, wherein the U-shaped member is retained by a torsion spring, and a pull cord is disposed on the U-shaped member and extends out of the blower housing.

6. The fan according to claim 4, wherein a positioning plate is arranged on the inner wall of the inner frame body through a spring, a positioning column is arranged on the positioning plate, and the positioning column extends out of the inner frame body to limit the U-shaped part.

7. The fan according to claim 1, wherein an inner cylinder is concentrically arranged inside the cylinder, the first cylindrical connecting member is arranged inside the inner cylinder, a plurality of exhaust holes are formed in a side wall of one end of the inner cylinder, which is close to the outer frame, and an annular air passage is formed between the inner cylinder and the cylinder;

8. The fan according to claim 7, wherein an external column is vertically arranged on the outer wall of the connecting column, the external column is provided with an auxiliary air passage communicated with the hollow air passage, a third cylindrical connecting piece is arranged in the auxiliary air passage, a blind hole communicated with the auxiliary air passage is concentrically arranged on the third cylindrical connecting piece, and a baffle plate of the third cylindrical connecting piece is arranged at the outer end of the auxiliary air passage;

9. The fan blower according to claim 7, wherein a pressure sensor is disposed on a contact surface of the connecting column and the cylinder, and the pressure sensor and an igniter disposed in the combustion chamber form an ignition control circuit.

10. The fan of claim 8, wherein the U-shaped element is limited by a torsion spring, and the connecting column and the cylindrical connecting element are both provided with a pull rope, and the pull rope extends out of the fan shell.