CN218913296U - Rear fan housing and industrial fan - Google Patents

Abstract

The utility model provides a rear fan housing and an industrial fan, and relates to the technical field of industrial fans. The rear fan cover comprises a cover body, wherein the assembly side of the rear fan cover and a middle barrel of the industrial fan serves as a reference, the cover body comprises a plurality of first cover plates which are obliquely downwards arranged and a plurality of second cover plates which are obliquely upwards arranged, the first cover plates and the second cover plates are staggered and connected end to end, the first cover plates are provided with first air inlets, and the second cover plates are provided with second air inlets. The longitudinal section of the cover body is in a folded line shape, the first air inlet arranged on the first cover plate and the second air inlet arranged on the second cover plate are obliquely arranged, the rear air cover is provided with at least two air inlets in different directions, and the possibility that the two air inlets in different directions are blocked simultaneously is extremely small, so that the rear air cover can ensure that the industrial fan has enough wind power. In addition, when the industrial fan works, the outwards protruding part and the inwards protruding part of the cover body can also play a role in blocking foreign matters.

Description

Rear fan housing and industrial fan

Technical Field

The utility model relates to the technical field of industrial fans, in particular to a rear fan housing and an industrial fan.

Background

The industrial fan can most effectively push a large amount of air to move, and generate super-large air quantity, so that the space forms a moving and circulating air flow field, and the air circulation of the space can be effectively regulated and controlled. However, in the industrial fan in the prior art, when in operation, the air inlet is easily blocked by foreign matters, especially under severe environmental conditions, such as plastic bags, paper sheets and other foreign matters are circulated, so that the wind power is greatly weakened.

Disclosure of Invention

The first object of the present utility model is to provide a rear fan housing, which solves the technical problem that the air inlet of an industrial fan in the prior art is easily blocked by foreign matters, so that the wind power is greatly weakened.

The utility model provides a rear fan cover, which comprises a cover body, wherein the cover body takes the assembly side of the rear fan cover and a middle cylinder of an industrial fan as a reference, the cover body comprises a plurality of first cover plates which are obliquely downwards arranged and a plurality of second cover plates which are obliquely upwards arranged, the first cover plates and the second cover plates are arranged in a staggered manner from top to bottom and are connected end to end, the first cover plates are provided with first air inlets, and the second cover plates are provided with second air inlets.

Further, a left cover plate is arranged at the left end of each first cover plate and a right cover plate is arranged at the right end of each second cover plate adjacent to the lower part of each first cover plate; the left cover plate and the right cover plate are triangular, two sides of the left cover plate and the right cover plate are respectively fixedly connected with the first cover plate and the second cover plate, and the third side of the left cover plate and the right cover plate is used for being connected with a middle cylinder of the industrial fan.

Further, the left cover plate is provided with a third air inlet for air intake from the left side of the rear fan housing; and/or the right cover plate is provided with a fourth air inlet for air intake from the right side of the rear fan housing.

Further, the first air inlet, the second air inlet, the third air inlet and the fourth air inlet are all provided with filter sheets;

the filter sheet comprises a main filter sheet and a side filter sheet; the first air inlet and the second air inlet are identical in shape, and the main filter discs are arranged on the first air inlet and the second air inlet; the third air inlet and the fourth air inlet are identical in shape, and the side filter discs are installed on the third air inlet and the fourth air inlet.

Further, the first air inlet and the second air inlet are rectangular, and the main filter sheet is also rectangular and matched with the first air inlet and the second air inlet; the third air inlet and the fourth air inlet are triangular, and the side filter disc is triangular and matched with the third air inlet and the fourth air inlet.

Further, the filter plate comprises a frame and a filter screen arranged in the frame, and the main filter plate comprises a first frame and a first filter screen arranged in the first frame; the side filter piece comprises a second frame and a second filter screen arranged in the second frame.

Further, grooves with inward notches are formed in the side walls of the air inlets along the circumferential direction, and the filter plates are movably embedded in the grooves.

Further, the inner side of the cover body is the assembly side of the cover body and the middle barrel of the industrial fan, the top cover plate of the cover body is a first cover plate which extends obliquely downwards and outwards, and the bottom cover plate of the cover body is a second cover plate which extends obliquely upwards and outwards.

Further, the cover body is provided with a mounting frame for mounting the motor;

the cover body comprises a first cover body and a second cover body, the first cover body is provided with a first frame portion, the second cover body is provided with a second frame portion, the first cover body is fixedly connected with the second cover body, and the first frame portion and the second frame portion enclose into the installation frame.

Further, the first cover body is an upper cover body, the second cover body is a lower cover body, a bottom cover plate of the upper cover body is the first cover plate, a top cover plate of the lower cover body is the second cover plate, and the bottom cover plate of the upper cover body is fixedly connected with a top cover plate of the lower cover body;

the first frame part is an upper frame, the second frame part is a lower frame, and the upper frame and the lower frame enclose the mounting frame.

Further, the upper cover body and the lower cover body are arranged symmetrically up and down, and the structures are consistent.

Further, an upper connecting lug is arranged on the outer side wall of the upper frame, and an upper through hole is formed in the upper connecting lug; the outer side wall of the lower frame is provided with a lower connecting lug, and the lower connecting lug is provided with a lower through hole; the motor is clamped in the mounting frame through the upper through hole and the lower through hole by a first fastener.

Further, a connecting piece is further arranged between the bottom cover plate of the upper cover body and the top cover plate of the lower cover body, the connecting piece is in a shape of <' >, is arranged on the inner side of the cover body, and two ends of the connecting piece respectively penetrate out from an upper perforation on the bottom cover plate of the upper cover body and a lower perforation on the top cover plate of the lower cover body and are connected with a second fastening piece.

Further, an upper mounting hole is formed in the top cover plate of the cover body, a lower mounting hole is formed in the bottom cover plate of the cover body, and the rear fan cover is mounted on the middle barrel of the industrial fan through the upper mounting hole and the lower mounting hole by a third fastener.

The rear fan housing provided by the utility model has the following beneficial effects:

the rear fan cover comprises a plurality of first cover plates and a plurality of second cover plates which are arranged in a staggered mode and connected end to end, the first cover plates are inclined downwards, the second cover plates are inclined upwards, namely, the longitudinal section of the cover body is in a folded line shape, so that a first air inlet arranged on the first cover plates and a second air inlet arranged on the second cover plates are also inclined, the rear fan cover is provided with at least two air inlets in different directions, and the possibility that the two air inlets in different directions are blocked at the same time is extremely low. In addition, when the industrial fan works, the outwards protruding part of the cover body can block foreign matters in the air inlet at first to play a first blocking role, and if the foreign matters continue to enter the industrial fan deeply along with the air inlet, the inwards protruding part of the cover body can also play a second blocking role, so that the rear fan cover provided by the utility model can also effectively block the foreign matters from entering the industrial fan, and can play a protective role on the industrial fan.

The second objective of the present utility model is to provide an industrial fan, which solves the technical problem that the air inlet of the industrial fan is easily blocked by foreign matters in the prior art, so that the wind power is greatly reduced.

The utility model provides an industrial fan which comprises a front fan housing, a middle cylinder and the rear fan housing, wherein the front fan housing and the rear fan housing are respectively arranged at the front part and the rear part of the middle cylinder. The industrial fan has all the advantages of the rear fan housing, and therefore, the description thereof is omitted.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a rear fan housing according to an embodiment of the present utility model;

FIG. 2 is a second schematic structural view of a rear fan housing according to an embodiment of the present utility model;

fig. 3 is a schematic structural view of an upper cover body of a rear fan cover according to an embodiment of the present utility model;

fig. 4 is a schematic structural view of a lower cover body of a rear fan cover according to an embodiment of the present utility model;

fig. 5 is a schematic structural diagram of a main filter of a rear fan housing according to an embodiment of the present utility model;

fig. 6 is a schematic structural diagram of a side filter of a rear fan housing according to an embodiment of the present utility model.

Reference numerals illustrate:

100-a cover body; 110-a first cover plate; 111-a first air inlet; 120-a second cover plate; 121-a second air inlet; 130-left cover plate; 131-a third air inlet; 140-right cover plate; 141-a fourth air inlet; 150-an upper cover body; 151-upper frame; 152-upper connecting lugs; 153-upper through hole; 155-upper perforation; 156-upper mounting holes; 160-lower cover body; 161-lower frame; 162-lower connecting lugs; 163-lower through holes; 165-lower perforation; 166-lower mounting hole;

210-a main filter sheet; 211-a first frame; 212-a first filter screen; 220-side filter sheets; 221-a second frame; 222-a second filter screen;

300-connectors;

410-a first fastener; 420-a second fastener.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

In fig. 1 and 2, the directions indicated by arrows a and b are the up and down directions of the rear hood, the directions indicated by arrows c and d are the left and right directions of the rear hood, and the directions indicated by arrows e and f are the outside and inside of the rear hood.

The present embodiment provides a rear fan housing, as shown in fig. 1 to 4, the rear fan housing includes a housing body 100, with the assembly side of the rear fan housing and the middle barrel of the industrial fan as a reference, the housing body 100 includes a plurality of first cover plates 110 disposed obliquely downward and a plurality of second cover plates 120 disposed obliquely upward, and the first cover plates 110 and the second cover plates 120 are disposed alternately from top to bottom and connected end to end, the first cover plates 110 are provided with first air inlets 111, and the second cover plates 120 are provided with second air inlets 121.

The rear fan housing provided in this embodiment includes a plurality of first cover plates 110 and a plurality of second cover plates 120 that are staggered and connected end to end, and the first cover plates 110 are inclined downward, and the second cover plates 120 are inclined upward, i.e. the longitudinal section of the housing body 100 is in a zigzag shape, so that the first air inlet 111 arranged on the first cover plates 110 and the second air inlet 121 arranged on the second cover plates 120 are also inclined, so that the rear fan housing has at least two air inlets in different directions, and the possibility that the two air inlets in different directions are blocked simultaneously is extremely small, and therefore, the rear fan housing provided in this embodiment can ensure that the industrial fan has sufficient wind power. In addition, during operation of the industrial fan, the outward protruding portion of the cover body 100 can block foreign matters in the air inlet first to play a first blocking role, and if the foreign matters continue to penetrate into the industrial fan along with the air inlet, the inward protruding portion of the cover body 100 can also play a second blocking role, so that the rear fan cover provided by the embodiment can also effectively block the foreign matters from entering the industrial fan, and can play a protective role on the industrial fan.

Specifically, in the present embodiment, as shown in fig. 1 to 4, between each first cover plate 110 and the second cover plate 120 adjacent therebelow, left cover plates 130 are provided at the left ends, and right cover plates 140 are provided at the right ends; the left and right cover plates 130 and 140 are triangular in shape and have two sides fixedly connected to the first and second cover plates 110 and 120, respectively, and a third side for connection to a middle barrel of the industrial fan. In this arrangement, the left and right cover plates 130 and 140 block the left and right ends of the housing 100, respectively, to prevent foreign matters from entering the inside of the industrial fan from the left or right ends of the housing 100.

Specifically, in the present embodiment, as further shown in fig. 1 to 4, the left cover plate 130 is provided with a third air inlet 131 for air intake from the left side of the rear fan housing; the right cover plate 140 is provided with a fourth air inlet 141 for air intake from the right side of the rear fan housing. Under this kind of setting form, the back fan housing has four air intakes, and all air intakes are simultaneously plugged up the possibility less to can have sufficient wind-force for the industry fan and provide further assurance.

It should be noted that, in other embodiments of the present application, according to the air intake requirement, only the third air intake 131 may be formed at the left cover plate 130 or only the fourth air intake 141 may be formed at the right cover plate 140.

Specifically, in this embodiment, the first air inlet 111, the second air inlet 121, the third air inlet 131 and the fourth air inlet 141 are all installed with filter sheets; the filter sheets include a main filter sheet 210 and a side filter sheet 220; the first air inlet 111 and the second air inlet 121 have the same shape, and are provided with a main filter 210; the third air inlet 131 and the fourth air inlet 141 have the same shape, and are each provided with a side filter 220. The filter disc has stronger blocking effect on foreign matters in the air inlet, and can play a role in filtering and blocking dust, thereby purifying the environment.

More specifically, in the present embodiment, as shown in fig. 1 to 6, the first air inlet 111 and the second air inlet 121 are rectangular, and the main filter 210 is also rectangular and matches with the first air inlet 111 and the second air inlet 121; the third air inlet 131 and the fourth air inlet 141 are triangular, and the side filter 220 is also triangular and matched with the third air inlet 131 and the fourth air inlet 141. Under this kind of setting form, the shape of each air intake matches with the shape of corresponding cover plate, and the width of the frame of air intake can set up more evenly to can guarantee the structural strength of cover plate itself, and can enlarge the size of air intake as far as, and then improve the intake.

More specifically, in the present embodiment, as shown in fig. 5 and 6, the filter sheet includes a frame and a filter screen disposed in the frame, and the main filter sheet 210 includes a first frame 211 and a first filter screen 212 disposed in the first frame 211; the side filter 220 includes a second frame 221 and a second filter 222 disposed in the second frame 221.

Specifically, in this embodiment, the side wall of each air inlet is provided with a groove (not shown in the figure) with an inward notch along the circumferential direction, and the filter plate is movably embedded in the groove.

Specifically, in this embodiment, as shown in fig. 2, the inner side of the cover 100, i.e. the side indicated by arrow e, is the assembly side of the cover 100 and the middle barrel of the industrial fan, the top cover plate of the cover 100 is a first cover plate 110 extending obliquely downward and outward, and the bottom cover plate of the cover 100 is a second cover plate 120 extending obliquely upward and outward.

It should be noted that, in other embodiments of the present application, it may also be: the outer side of the cover 100 is the assembly side of the cover with the middle barrel of the industrial fan, the top cover plate of the cover 100 is a first cover plate 110 extending downwards and inwards in an inclined way, and the bottom cover plate of the cover 100 is a second cover plate 120 extending upwards and inwards in an inclined way.

Specifically, in the present embodiment, the cover 100 is provided with a mounting frame for mounting the motor; the cover 100 includes a first cover and a second cover, the first cover is provided with a first frame, the second cover is provided with a second frame, the first cover and the second cover are fixedly connected, and the first frame and the second frame enclose a mounting frame. Under this kind of setting form, first frame portion and second frame portion combination form the installing frame of motor, when installing the motor, can place the motor in one of them frame portion earlier, then with another frame portion lock in this frame portion to press from both sides the motor and hold, easy and convenient operation is got up.

More specifically, in this embodiment, as shown in fig. 3 and 4, the first cover is an upper cover 150, the second cover is a lower cover 160, the bottom cover of the upper cover 150 is a first cover 110, the top cover of the lower cover 160 is a second cover 120, and the bottom cover of the upper cover 150 is fixedly connected with the top cover of the lower cover 160; the first frame portion is an upper frame 151, the second frame portion is a lower frame 161, and the upper frame 151 and the lower frame 161 enclose a mounting frame.

It should be noted that, in other embodiments of the present application, it may also be: the first cover body is the left cover body, and the second cover body is the right cover body, and left cover body and right cover body fixed connection, for example: the right-hand member of the left cover body can be provided with first engaging lug, and the left end of the right cover body can be provided with the second engaging lug that corresponds with first engaging lug, all has seted up the connecting hole on the engaging lug that corresponds, uses screw or pin etc. to connect left cover body and right cover body through corresponding connecting hole.

Specifically, in the present embodiment, as shown in fig. 1 to 4, the upper and lower cases 150 and 160 are disposed symmetrically up and down. So set up, be convenient for set up the motor in the intermediate position of back fan housing.

More specifically, in this embodiment, as further shown in fig. 1 to 4, the upper housing 150 and the lower housing 160 are identical in structure, and when assembled, the lower housing 160 is fixedly connected to the upper housing 150 in an inverted state. By the arrangement, design workload is greatly reduced, and manufacturing process is simplified.

Specifically, in this embodiment, as shown in fig. 3 and 4, an outer side wall of the upper frame 151 is provided with an upper connection ear 152, and the upper connection ear 152 is provided with an upper through hole 153; the outer side wall of the lower frame 161 is provided with a lower connecting lug 162, and the lower connecting lug 162 is provided with a lower through hole 163; the first fastener 410 clamps the motor inside the mounting frame through the upper through hole 153 and the lower through hole 163.

More specifically, in the present embodiment, as shown in fig. 1, the first fastener 410 includes a mating first bolt and first nut, and the first bolt passes through the upper through hole 153 and the lower through hole 163 and is connected with the first nut.

Specifically, in the present embodiment, the number of the upper connecting lugs 152 is two, and the upper connecting lugs are symmetrically disposed on the left and right sides of the upper frame 151; the number of the lower connecting lugs 162 is two, and the lower connecting lugs are symmetrically arranged at the left side and the right side of the lower frame 161. So set up, the mounting frame is more firm to the fastening effect of the motor in it.

Specifically, in the present embodiment, as shown in fig. 1 to 4, the mounting frame is a square frame, and the upper frame 151 and the lower frame 161 are each half square, but in other embodiments of the present application, the shape of the mounting frame is not limited thereto, for example: the mounting frame may also be a circular frame, and the upper frame 151 and the lower frame 161 are both semicircular, i.e., the specific shape of the mounting frame may be specifically set according to the shape of the motor housing.

Specifically, in this embodiment, as shown in fig. 1 and 2, a connecting member 300 is further disposed between the bottom cover plate of the upper cover 150 and the top cover plate of the lower cover 160, the connecting member 300 is shaped like "<", and is disposed inside the cover 100, and two ends of the connecting member respectively pass through the upper perforation 155 on the bottom cover plate of the upper cover 150 and the lower perforation 165 on the top cover plate of the lower cover 160, and are connected to the second fastening member 420. In this arrangement, the connector 300 also serves to connect and support the upper and lower cases 150 and 160, in addition to the left and right cover plates 130 and 140 at both ends, between the bottom cover plate of the upper case 150 and the top cover plate of the lower case 160.

Specifically, in the present embodiment, the included angle between the first cover plate 110 and the second cover plate 120 adjacent below the first cover plate is 60 °, and the included angle between the two connecting arms of the connecting member 300 is also 60 °.

More specifically, in the present embodiment, as shown in fig. 1 and 2, the number of the connection members 300 is two, and the two connection members 300 are symmetrically disposed at both left and right sides of the motor mounting frame to provide a firm connection between the upper and lower cases 150 and 160. In summary, the upper cover 150 and the lower cover 160 are connected together by three or six connection structures along with the connection of the connection lugs between the upper frame 151 and the lower frame 161, so that the connection firmness and reliability are well ensured.

More specifically, in this embodiment, as shown in fig. 1, two ends of the connecting member 300 may be provided with external threads, and the second fastening member 420 may be a second nut, and the two second nuts are respectively coupled to two ends of the connecting member 300 in a matching manner.

Specifically, in this embodiment, the top cover plate of the cover body 100 is provided with an upper mounting hole 156, the bottom cover plate of the cover body 100 is provided with a lower mounting hole 166, and the third fastener mounts the rear fan housing to the middle barrel of the industrial fan through the upper mounting hole 156 and the lower mounting hole 166.

More specifically, in the present embodiment, the number of the upper mounting holes 156 is two, and the two upper mounting holes 156 are symmetrically arranged left and right; the number of the lower mounting holes 166 is also two, and the two lower mounting holes 166 are also symmetrically arranged left and right. So set up, the position that the back fan housing is close to four angles all with industrial fan's middle part section of thick bamboo fixed connection, guaranteed the installation firmness of back fan housing.

The embodiment also provides an industrial fan, which comprises a front fan housing, a middle cylinder and the rear fan housing, wherein the front fan housing and the rear fan housing are respectively arranged at the front part and the rear part of the middle cylinder. After the upper cover 150 is fixedly connected with the lower cover 160, the upper cover is fixedly connected with the middle cylinder, so that the fan blades rotate in the space formed by the front fan cover, the middle cylinder and the rear fan cover, the filter sheet filters the wind at the air inlet, and then the wind is blown to a user through the front fan cover, so that the user obtains purified air. The industrial fan has all the advantages of the rear fan housing, and therefore, the description thereof is omitted.

Finally, it is further noted that relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to the embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. The utility model provides a back fan housing, its characterized in that, includes the cover body (100), with the assembly side of back fan housing and industrial fan's middle part section of thick bamboo is the benchmark, the cover body (100) include a plurality of first cover plate (110) that set up downwards to one side and a plurality of second cover plate (120) that set up upwards to one side, and top-down, first cover plate (110) with second cover plate (120) crisscross setting, end to end, first air intake (111) have been seted up to first cover plate (110), second air intake (121) have been seted up to second cover plate (120).

2. The rear fan housing according to claim 1, wherein between each of the first cover plates (110) and the second cover plate (120) adjacent therebelow, a left cover plate (130) is provided at a left end, and a right cover plate (140) is provided at a right end; the left cover plate (130) and the right cover plate (140) are triangular, two sides of the left cover plate are fixedly connected with the first cover plate (110) and the second cover plate (120) respectively, and the third side of the left cover plate is used for being connected with a middle barrel of the industrial fan.

3. The rear fan housing according to claim 2, characterized in that the left cover plate (130) is provided with a third air inlet (131) for air intake from the left side of the rear fan housing; and/or, the right cover plate (140) is provided with a fourth air inlet (141) for air intake from the right side of the rear fan housing.

4. A rear fan housing according to claim 3, characterized in that the first air inlet (111), the second air inlet (121), the third air inlet (131) and the fourth air inlet (141) are each provided with a filter sheet;

the filter sheet comprises a main filter sheet (210) and a side filter sheet (220); the first air inlet (111) and the second air inlet (121) are the same in shape, and the main filter sheet (210) is arranged on each of the first air inlet and the second air inlet; the third air inlet (131) and the fourth air inlet (141) are identical in shape, and the side filter discs (220) are arranged on the third air inlet and the fourth air inlet.

5. The rear fan housing according to claim 1, wherein the inner side of the housing (100) is the assembly side of the housing with the middle barrel of the industrial fan, the top housing plate of the housing (100) is a first housing plate (110) extending obliquely downwards and outwards, and the bottom housing plate of the housing (100) is a second housing plate (120) extending obliquely upwards and outwards.

6. Rear fan housing according to any of claims 1-5, characterized in that the housing body (100) is provided with a mounting frame for mounting a motor;

the cover body (100) comprises a first cover body and a second cover body, wherein the first cover body is provided with a first frame portion, the second cover body is provided with a second frame portion, the first cover body is fixedly connected with the second cover body, and the first frame portion and the second frame portion enclose into the installation frame.

7. The back fan housing according to claim 6, wherein the first housing is an upper housing (150), the second housing is a lower housing (160), a bottom cover plate of the upper housing (150) is the first cover plate (110), a top cover plate of the lower housing (160) is the second cover plate (120), and the bottom cover plate of the upper housing (150) and the top cover plate of the lower housing (160) are fixedly connected;

the first frame part is an upper frame (151), the second frame part is a lower frame (161), and the upper frame (151) and the lower frame (161) enclose the mounting frame.

8. The rear fan housing according to claim 7, wherein an outer side wall of the upper frame (151) is provided with an upper connection lug (152), and the upper connection lug (152) is provided with an upper through hole (153); the outer side wall of the lower frame (161) is provided with a lower connecting lug (162), and the lower connecting lug (162) is provided with a lower through hole (163); a first fastener (410) clamps the motor within the mounting frame through the upper through hole (153) and the lower through hole (163).

9. The back fan housing according to claim 7, wherein a connecting piece (300) is further disposed between the bottom cover plate of the upper housing body (150) and the top cover plate of the lower housing body (160), the connecting piece (300) is shaped like "<", is disposed on the inner side of the housing body (100), and two ends of the connecting piece respectively penetrate from the upper perforation (155) on the bottom cover plate of the upper housing body (150) and the lower perforation (165) on the top cover plate of the lower housing body (160) and are connected with the second fastening piece (420).

10. An industrial fan comprising a front hood, a middle barrel, and a rear hood according to any one of claims 1-9, the front hood and the rear hood being mounted to the front and rear of the middle barrel, respectively.

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