CN218467916U - Curtain door diversion centrifugal fan - Google Patents

Abstract

The utility model discloses a curtain door diversion centrifugal fan, the relation between the structural modules of the machine is that the machine body assembly is arranged on the machine base assembly, the curtain door assembly is arranged on the air outlet table of the machine body assembly, the lower end of the push rod assembly is fixed on the machine base, and the upper end is movably connected with the push rod of the middle leaf curtain of the curtain door assembly; the left curtain is arranged at the left side, the middle curtain is arranged at the middle side, the right curtain is arranged at the right side, and the arc plate surface of the left curtain and the arc plate surface of the right curtain are pressed down by the middle curtain; the push rod assembly is adopted to push the three sliding curtains to move and match, so that the position and the direction of the air outlet can be changed within a certain range, the air outlet resistance of the fan is small in change and the attenuation of the air quantity and the air pressure is small in the turning process, and the problems that large and medium-sized centrifugal fans are complex in air outlet mechanism changing, the air quantity and the air pressure loss are large and the efficiency of the fan is greatly attenuated are solved.

Description

Curtain door diversion centrifugal fan

Technical Field

The utility model relates to a centrifugal fan technical field specifically is a curtain door diversion centrifugal fan.

Background

In the fields of landscaping, environmental protection dust removal, ventilation, cooling and the like which need wind power to assist in delivering fog drops, an axial flow fan or a centrifugal fan needs to be used, and when the outdoor or road operation with inconvenient power supply connection is carried out, the axial flow fan needs to convert the electric energy generated by a generator set into mechanical energy and needs larger energy consumption. The centrifugal fan adopts a transmission mechanism of a power shaft connection and a belt transmission of an internal combustion engine, the energy consumption is small, the conventional centrifugal fan comprises a centrifugal fan blade, a fan shaft, a fan blade shell (centrifugal chamber), an air outlet, a belt pulley (or other shaft connection mechanisms), a fan base and the like, the general structure is that the fan blade shell is fixed on the fan base, the air outlet is fixed in a certain direction of the centrifugal fan, the centrifugal fan blade, the fan shaft and the belt pulley are sequentially connected and fix the fan shaft on the fan base through a bearing and a sleeve thereof, the centrifugal fan blade is arranged in the fan worm shell and can flexibly rotate, the structure can ensure that the fan can continuously and stably operate and generate wind power, the position of the air outlet and the air outlet direction are fixed because the fan air outlet is fixed on the fan shell, and the air outlet direction is changed if the air outlet direction needs to be changed, a corresponding bendable channel needs to be additionally arranged on the air outlet to change the air outlet direction, so that the cost and the operation difficulty are increased and the air quantity, the air pressure and the efficiency of the fan are reduced.

Based on this, the utility model designs a curtain door diversion centrifugal fan to solve above-mentioned technical problem.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a curtain door diversion centrifugal fan for solve above-mentioned technical problem.

In order to achieve the above object, the utility model provides a following technical scheme: a curtain door turning centrifugal fan comprises a base assembly, a machine body assembly, a curtain door assembly and a push rod assembly, wherein the machine body assembly is arranged on the base assembly, and the curtain door assembly comprises a left tension spring, a left curtain, a front bolt component of the curtain door, a rear bolt component of the curtain door, an arc plate surface of the left curtain, an arc plate surface of the right curtain, an upper movable head of a push rod, a push rod of a middle curtain, an enamel surface of an air outlet, the middle curtain, an air outlet of the fan, an air port switching part, the right curtain and the right tension spring;

the middle curtain is provided with a middle curtain arc panel, the center of the middle curtain arc panel is provided with a middle curtain air outlet, the air port switching part is arranged on the middle curtain air outlet, the air outlet enamel surface is arranged on the air port switching part, and a central hole of the air outlet enamel surface forms a fan air outlet;

the left curtain is provided with a left curtain front core hole and a left curtain rear core hole, the right curtain is provided with a right curtain front core hole and a right curtain rear core hole, and the middle curtain is provided with a middle curtain front core hole and a middle curtain rear core hole;

the middle curtain is arranged between the left curtain and the right curtain and presses the arc plate surface of the left curtain and the arc plate surface of the right curtain down; the cambered surface of the left leaf curtain is provided with a left leaf upper clamping strip back to a leaf center hole of the left leaf curtain, the cross section of the left leaf upper clamping strip is of a T-shaped structure, a middle leaf curtain left clamping strip is arranged on the inner side of the cambered surface of the middle leaf curtain cambered surface plate, and the left leaf upper clamping strip clamps the middle leaf curtain left clamping strip; the right curtain arc plate surface is provided with a right upper clamping strip back to a right curtain rear sash hole, the cross section of the right upper clamping strip is of a T-shaped structure, the inner side of the arc plate of the middle curtain arc plate is provided with a middle curtain right clamping strip, and the right upper clamping strip clamps the middle curtain right clamping strip; a left curtain lower clamping strip is arranged at the lower end of the arc plate surface of the left curtain and can clamp a machine lower T-shaped clamping strip on the air outlet table; the inner side of the lower end of the cambered surface of the right curtain arc plate surface is provided with a right fan lower clamping strip of an L-shaped structure, and the right fan lower clamping strip can clamp an on-machine L-shaped clamping strip arranged on the air outlet table;

the left curtain, the middle curtain and the right curtain are connected through a front curtain bolt component and a rear curtain bolt component;

the lower end of the arc plate surface of the left fan curtain arc plate surface is provided with a left tension spring upper fixing hole, the upper end of the left tension spring is provided with a left tension spring upper fixing hole, the machine body assembly is provided with a left tension spring lower fixing hole and a right tension spring lower fixing hole, the lower end of the left tension spring hooks the left tension spring lower fixing hole, the lower end of the arc plate surface of the right fan curtain arc plate surface is provided with a right tension spring upper fixing hole, the upper end of the right tension spring hooks the right tension spring upper fixing hole, and the lower end of the right tension spring hooks the right tension spring lower fixing hole;

the push rod assembly comprises a push rod fixing seat and a push rod, the push rod fixing seat is fixed on the fan fixing seat, the push rod fixing seat is connected with a push rod fixing block, and the push rod fixing block is hinged with a lower push rod movable head; the movable head is connected with the ejector pin under the ejector pin, the ejector pin output is connected with movable head on the ejector pin, well curtain is provided with the push rod fixing base, the push rod fixing base is connected with well curtain push rod, movable head is articulated with well curtain push rod on the ejector pin.

Preferably, the base assembly comprises a fan fixing seat, the fan fixing seat is provided with a base fixing hole for fixing the base assembly, and the fan fixing seat is connected with a bearing fixing seat connected with the machine body assembly.

Preferably, the machine body assembly comprises a left tension spring lower fixing hole, a machine lower T-shaped clamping strip, a wind table air outlet, a machine upper L-shaped clamping strip, a right tension spring lower fixing hole, a fan shaft, a fan worm plate, a fan front side plate, a fan rear side plate, an air outlet table, a centrifugal impeller and a centrifugal air cavity;

the middle part of the front side plate of the fan is provided with an impeller end shaft hole, and the middle part of the rear side plate of the fan is provided with an air inlet; the front side plate of the fan is welded and fixed with the bearing fixing seat, the rear side plate of the fan is welded and fixed with the fan fixing seat, and the cross section of the fan worm plate is completely the same as the outer contours of the front side plate of the fan and the rear side plate of the fan; the port of the fan worm plate forms a reversed-Y-shaped special-shaped cylindrical body with a fan front side plate and a fan rear side plate respectively, the middle lower part of the special-shaped cylindrical body is a centrifugal air cavity, the upper part of the special-shaped cylindrical body is an air outlet table, the fan worm plate is provided with an air table air outlet forming the air outlet table, and the air outlet table is positioned above a fan shaft;

the fan shaft is fixed on the bearing fixing seat, the fan front side plate is provided with an impeller end shaft hole and a curtain door front fixing hole, the fan rear side plate is provided with an air inlet and a curtain door rear fixing hole, the centers of the impeller end shaft hole and the air inlet are both on the axis of the fan shaft, and the axis of the fan shaft is perpendicular to the fan front side plate and the fan rear side plate; the front end of the fan shaft is provided with a belt pulley, the rear end of the fan shaft extends into the centrifugal air cavity, and the centrifugal impeller is placed into the centrifugal air cavity from the air inlet and is fixedly arranged at the rear end of the fan shaft; the front curtain door fixing hole and the rear curtain door fixing hole are formed in the circle center of a sector of the fan-shaped air outlet table, and the connecting line of the circle centers of the front curtain door fixing hole and the rear curtain door fixing hole is parallel to the axial lead of the fan shaft;

the left tension spring lower fixing hole, the under-machine T-shaped clamping strip, the on-machine L-shaped clamping strip and the right tension spring lower fixing hole are all located on the periphery of an air outlet of a fan table of the fan worm plate, the left tension spring lower fixing hole is formed in the lower side of a fan-shaped cylindrical body of the air outlet table, and the right tension spring lower fixing hole is formed in the upper side of the fan-shaped cylindrical body;

the left tension spring lower fixing hole and the under-machine T-shaped clamping strip are arranged on a fan worm plate which is positioned on one side of the air outlet of the air table and close to the same side of the push rod assembly, and the under-machine T-shaped clamping strip is of a T-shaped structure; the L-shaped clamping strip and the right tension spring lower fixing hole are formed in a fan worm plate located on the other side of the air outlet of the air table far away from the push rod assembly, and the L-shaped clamping strip is of an L-shaped structure.

Preferably, the front bolt assembly of the curtain door sequentially penetrates through the front sash core hole of the middle sash curtain, the front sash core hole of the left sash curtain, the front sash core hole of the right sash curtain and the front fixing hole of the curtain door and then is locked by the locknut, and the rear bolt assembly of the curtain door sequentially penetrates through the rear sash core hole of the middle sash curtain, the rear sash core hole of the left sash curtain, the rear sash core hole of the right sash curtain and the rear fixing hole of the curtain door and then is locked by the locknut; the left tension spring, the left leaf curtain arc plate surface, the middle leaf curtain, the right leaf curtain arc plate surface and the right tension spring form a whole which is mutually linked and sealed to the movable curtain door of the air outlet of the air table.

Preferably, the outer contours of the front fan side plate and the rear fan side plate of the machine body assembly are in a shape like a Chinese character 'ji', the outer contours are in mirror symmetry with each other, and side plate reinforcing ribs are arranged on the front fan side plate and the rear fan side plate.

Preferably, the fan front side plate, the fan volute plate and the fan rear side plate form a centrifugal air cavity.

Preferably, the left curtain arc plate surface, the middle curtain arc plate surface, the right curtain arc plate surface and the right curtain arc plate surface are of hollow fan-shaped structures.

Compared with the prior art, the beneficial effects of the utility model are that: the fan seat and the fan volute are fixed, the push rod is adopted to push the three sliding curtains matched with each other to move so as to continuously change the position and the direction of the air outlet, and in the continuous turning process, the resistance change of the air outlet is small, and the attenuation of the air volume and the air pressure is small. The problems that a bent pipe and a flow guide pipe mechanism of the large, medium and large centrifugal fans for changing the air outlet direction are complex, the air quantity and air pressure loss is large, and the direction can not be changed continuously are solved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a front view of the curtain door type turning centrifugal fan of the present invention.

Fig. 2 is a front view of the left curtain and the right curtain in mirror symmetry in fig. 1.

Fig. 3 is a front view of the air vent interface of fig. 1.

Fig. 4 is a left side view of fig. 1 (the fixed rod block 3, the lower movable rod head 4, the rod 5, the upper movable rod head 15 and the middle curtain rod 16 are removed).

Fig. 5 is a top view of fig. 1.

FIG. 6 is a front view of the left, center and right curtain of FIG. 1 with its attached components removed.

Fig. 7 is a left side view of fig. 6.

Fig. 8 is a top view of fig. 6.

Fig. 9 is a front view of the center curtain of fig. 1.

Fig. 10 is a front view of the left, middle and right curtains of fig. 1 after installation.

Fig. 11 is a partial top view of the air outlet platform of fig. 6.

Fig. 12 is a side view of fig. 11 after deployment.

Fig. 13 is a top view of fig. 9.

FIG. 14 is a front view of a front side plate of the blower of FIG. 1.

FIG. 15 is a front view of a rear side panel of the blower of FIG. 1.

Fig. 16 is a profile view of the fan scroll and its air table outlet of the drawing.

Fig. 17 is a left side view of the fan scroll of fig. 16 and its air outlet of the wind table.

Fig. 18 is a schematic view of a structural change of fig. 1 which is turned downward and backward.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a base fixing hole; 2. a mandril fixing seat; 3. a mandril fixing block; 4. a lower movable head of the mandril; 5. a top rod; 6. a left tension spring lower fixing hole; 7. a left tension spring; 8. a lower clamping strip of the left curtain; 9. a fixing hole is formed in the left tension spring; 10. a left curtain; 11. t-shaped clamping strips are arranged under the machine; 12. a front bolt assembly of the curtain door; 12-1, a rear bolt component of the curtain door; 12-2, a front curtain door fixing hole; 12-3, a curtain door rear fixing hole; 12-4, a front sash center hole of the middle sash curtain; 12-5, a central hole at the back of the middle curtain; 12-6, a front sash center hole of the left curtain; 12-7, a left curtain rear core hole; 12-8, a front sash center hole of the right curtain; 12-9, a rear sash center hole of the right curtain; 13. left curtain arc plate surface; 13-1, right curtain arc plate surface; 14. a middle curtain left clamping strip; 15. the ejector rod is provided with a movable head; 16. a middle curtain push rod; 17. a push rod fixing seat; a left 18, a fan upper clamping strip; 19. an air outlet of the air table; 20. an air outlet enamel surface; 21. a middle curtain; 21-1, a middle curtain arc panel; 22. an air outlet of the fan; 23. an air port adapter part; 24. a clamping strip is arranged on the right fan; 25. an onboard L-shaped clamping strip; 26. a right curtain; 27. the middle curtain right clamping strip; 28. a fixing hole is arranged on the right tension spring; 29. a right fan lower clamping strip; 30. a right tension spring; 31. a right tension spring lower fixing hole; 32. a fan shaft; 33. a fan volute plate; 34. a front side plate of the fan; 34-1, side plate reinforcing ribs; 34-2, a rear side plate of the fan; 34-3, an air outlet platform; 35. a fan fixing seat; 36. a bearing fixing seat; 37. a centrifugal impeller; 37-1, a centrifugal air cavity; 37-2, an axial hole at the end of the impeller; 38. an air inlet; 39. a belt pulley; 40. and an air outlet of the middle sash curtain.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Example (b):

referring to fig. 1-18, the present invention provides a technical solution: a centrifugal fan for changing direction of curtain door is mainly composed of a base fixing hole 1, an ejector rod fixing seat 2, an ejector rod fixing block 3, an ejector rod lower movable head 4, an ejector rod 5, a left pull spring lower fixing hole 6, a left pull spring 7, a left curtain lower clamping strip 8, a left tension spring upper fixing hole 9, a left curtain 10, a machine lower T clamping strip 11, a curtain door front bolt component 12, a curtain door rear bolt component 12-1, a curtain door front fixing hole 12-2, a curtain door rear fixing hole 12-3, a middle curtain front leaf hole 12-4, a middle curtain rear leaf hole 12-5, a left curtain front leaf hole 12-6, a left curtain rear leaf hole 12-7, a right curtain front leaf hole 12-8, a right curtain rear leaf hole 12-9, a left curtain arc plate surface 13, a right curtain arc plate surface 13-1, a middle curtain left clamping strip 14, an ejector rod upper curtain movable head 15, a middle curtain push rod 16, a push rod fixing seat 17, an air outlet 18, a left clamping strip 19, an air outlet 18, a left clamping strip 20 and a left curtain arc plate surface, the fan comprises a middle fan curtain 21, a middle fan curtain cambered plate 21-1, a fan air outlet 22, an air inlet adapter part 23, a right fan upper clamping strip 24, a machine upper L clamping strip 25, a right fan curtain 26, a middle fan curtain right clamping strip 27, a right tension spring upper fixing hole 28, a right fan lower clamping strip 29, a right tension spring 30, a right tension spring lower fixing hole 31, a fan shaft 32, a fan worm plate 33, a fan front side plate 34, a side plate reinforcing rib 34-1, a fan rear side plate 34-2, an air outlet table 34-3, a fan fixing seat 35, a bearing fixing seat 36, a centrifugal impeller 37, a centrifugal air cavity 37-1, an impeller end shaft hole 37-2, an air inlet 38, a belt pulley 39 and a middle fan curtain air outlet 40, and the whole structure can be composed of a machine base assembly, a machine body assembly, a curtain door assembly and a functional structural component The push rod assembly is composed of four parts; the machine body assembly is arranged on the machine base assembly, the curtain door assembly is arranged on an air outlet table 34-3 of the machine body assembly, the lower end of the push rod assembly is fixed on the machine base assembly, and the upper end of the push rod assembly is movably connected with a middle curtain push rod 16 of the curtain door assembly;

the base assembly consists of a base fixing hole 1, a fan fixing seat 35 and a bearing fixing seat 36, wherein the base fixing hole 1 on the fan fixing seat 35 can fix the base assembly, the bearing fixing seat 36 is welded and fixed on one side of the fan fixing seat 35, and the fan fixing seat 35 and the bearing fixing seat 36 are used for fixing the machine body assembly;

the machine body assembly consists of a left tension spring lower fixing hole 6, a machine lower T-shaped clamping strip 11, a curtain door front fixing hole 12-2, a curtain door rear fixing hole 12-3, a wind table air outlet 19, a machine upper L-shaped clamping strip 25, a right tension spring lower fixing hole 31, a fan shaft 32, a fan worm plate 33, a fan front side plate 34, a side plate reinforcing rib 34-1, a fan rear side plate 34-2, an air outlet table 34-3, a centrifugal impeller 37, a centrifugal wind cavity 37-1, an impeller end shaft hole 37-2, an air inlet 38 and a belt pulley 39; the outer contours of the fan front side plate 34 and the fan rear side plate 34-2 are completely the same and similar to a figure 8, and the outer contours are mirror images of each other, the middle part of the fan front side plate 34 is provided with an impeller end shaft hole 37-2, the middle part of the fan rear side plate 34-2 is provided with an air inlet 38, and the diameter of the air inlet 38 is larger than the outer diameter of the centrifugal impeller 37; side plate reinforcing ribs 34-1 capable of increasing the strength of the side plates are arranged on the fan front side plate 34 and the fan rear side plate 34-2 respectively, the fan front side plate 34 is fixedly welded with the bearing fixing seat 36 and is kept in a vertical state with the fan fixing seat 35, the fan rear side plate 34-2 is fixedly welded with the fan fixing seat 35 and is kept in a vertical state with the fan fixing seat 35, and the fan front side plate 34 and the fan rear side plate 34-2 are kept parallel and are aligned with each other like an 8-shaped outer contour; the fan volute plate 33 is a rectangular strip-shaped plate, an inner rectangular strip is cut out of the center of the rectangular strip-shaped plate to form an inner long rectangular hole, the rectangular strip-shaped plate is bent into a special-shaped cylindrical ring with a similar 8-shaped outer contour, and after the head and tail joints of the special-shaped cylindrical ring are fully welded, the fan volute plate 33 of the special-shaped cylindrical ring is formed, and the cross section of the fan volute plate 33 is completely the same as the similar 8-shaped outer contours of the fan front side plate 34 and the fan rear side plate 34-2; two ports with similar 8-shaped outer contours of a fan worm plate 33 of the special-shaped cylindrical ring are aligned with similar 8-shaped outer contours of a fan front side plate 34 and a fan rear side plate 34-2 respectively and then are welded and fixed into a hollow special-shaped cylindrical body with a similar 8-shaped outer contour, the middle lower part of the special-shaped cylindrical body is a centrifugal air cavity 37-1, the upper part of the special-shaped cylindrical body is similar to a fan-shaped cylindrical body and is provided with an air outlet platform 34-3, a rectangular strip plate processed into the fan worm plate 33 forms an air outlet platform 19 of the air outlet platform 34-3 in the area of an inner strip rectangular hole in the center of the rectangular strip plate after being folded into the special-shaped cylindrical ring, and the air outlet platform 34-3 is positioned above a fan shaft 32;

the fan shaft 32 is fixed on the bearing fixing seat 36, the axial lead of the fan shaft 32 is kept parallel to the fan fixing seat 35, the fan front side plate 34 is provided with an impeller end shaft hole 37-2 and a curtain door front fixing hole 12-2, the fan rear side plate 34-2 is provided with an air inlet 38 and a curtain door rear fixing hole 12-3, the circle centers of the impeller end shaft hole 37-2 and the air inlet 38 are on the axial lead of the fan shaft 32, and the axial lead of the fan shaft 32 is perpendicular to the fan front side plate 34 and the fan rear side plate 34-2; the front end of the fan shaft 32 is provided with a belt pulley 39, the rear end of the fan shaft 32 penetrates through an impeller end shaft hole 37-2 arranged in the middle of the fan front side plate 34 and extends into a centrifugal air cavity 37-1, and the centrifugal impeller 37 is placed into the centrifugal air cavity 37-1 from an air inlet 38 and is fixedly arranged at the rear end of the fan shaft 32; the front curtain door fixing hole 12-2 and the rear curtain door fixing hole 12-3 are arranged at the circle center of a sector of the fan-shaped air outlet table 34-3, the circle center connecting line of the front curtain door fixing hole 12-2 and the rear curtain door fixing hole 12-3 is parallel to the axial lead of the fan shaft 32, and the front curtain door fixing hole 12-2 and the rear curtain door fixing hole 12-3 can be used for movably fixing the curtain door assembly;

a left tension spring lower fixing hole 6, a lower T-shaped clamping strip 11, an upper L-shaped clamping strip 25 and a right tension spring lower fixing hole 31 of the machine body assembly are all positioned at the periphery of a wind table air outlet 19 of a fan worm plate 33, a left tension spring lower fixing hole 6 is arranged on the lower side of a fan-shaped columnar body of an air outlet table 34-3, and a right tension spring lower fixing hole 31 is arranged on the upper side of the fan-shaped columnar body;

the left tension spring lower fixing hole 6 and the under-machine T-shaped clamping strip 11 are arranged on a fan worm plate 33 which is positioned on one side of the air outlet 19 of the air table and is close to the same side of the push rod assembly, and the under-machine T-shaped clamping strip 11 is of a T-shaped structure; the on-board L-shaped clamping strip 25 and the right tension spring lower fixing hole 31 are arranged on a fan worm plate 33 positioned on the other side of the air outlet 19 of the air platform far away from the push rod assembly, and the on-board L-shaped clamping strip 25 is of an L-shaped structure;

the curtain door assembly consists of a left pull spring 7, a left curtain lower clamping strip 8, a left tension spring upper fixing hole 9, a left curtain 10, a curtain door front bolt component 12, a curtain door rear bolt component 12-1, a middle curtain front leaf core hole 12-4, a middle curtain rear leaf core hole 12-5, a left curtain front leaf core hole 12-6, a left curtain rear leaf core hole 12-7, a right curtain front leaf core hole 12-8, a right curtain rear leaf core hole 12-9, a left curtain arc plate surface 13, a right curtain arc plate surface 13-1, a middle curtain left clamping strip 14, a push rod upper movable head 15, a middle curtain push rod 16, a push rod fixing seat 17, a left curtain upper clamping strip 18, an air outlet enamel surface 20, a middle curtain 21, a middle curtain arc plate surface 21-1, a fan air outlet 22, an air port switching part 23, a right upper clamping strip 24, a right curtain 26, a middle curtain right clamping strip 27, a right curtain upper fixing hole 28, a right tension spring lower clamping strip 29, a right tension spring 30 and a middle leaf clamping strip 40;

the middle fan curtain 21 is provided with a middle fan curtain cambered panel 21-1, the middle fan curtain air outlet 40 is arranged in the center of the middle fan curtain cambered panel 21-1 of the middle fan curtain 21, the air inlet switching part 23 is arranged on the middle fan curtain air outlet 40 and is welded firmly without air leakage, the air outlet enamel surface 20 is arranged on the air inlet switching part 23, and the central hole of the air outlet enamel surface 20 forms a fan air outlet 22;

the inner side of the arc panel of the middle curtain arc panel 21-1 is provided with a middle curtain left clamping strip 14 and a middle curtain right clamping strip 27, and the shapes of the middle curtain left clamping strip 14 and the middle curtain right clamping strip 27 are both L-shaped structures; the upper end of the left curtain arc plate surface 13 is provided with a left upper clamping strip 18 with a T-shaped structure, the left upper clamping strip 18 is arranged towards the inner side and the outer side of the left curtain arc plate surface 13, the lower end of the left curtain arc plate surface 13 is provided with a left lower clamping strip 8, and the left lower clamping strip 8 is arranged towards the inner side of the left curtain arc plate surface 13; the upper end of the cambered surface of the right curtain arc plate surface 13-1 is provided with a right upper clamping strip 24 with a T-shaped structure, the right upper clamping strip 24 is arranged towards the inner side and the outer side of the right curtain arc plate surface 13-1, the inner side of the lower end of the cambered surface of the right curtain arc plate surface 13-1 is provided with a right lower clamping strip 29 with an L-shaped structure, and the right lower clamping strip 29 is arranged towards the inner side of the right curtain arc plate surface 13-1; the lower end of the outer side of the arc plate surface of the left curtain arc plate surface 13 is provided with a left tension spring upper fixing hole 9, and the lower end of the outer side of the arc plate surface of the right curtain arc plate surface 13-1 is provided with a right tension spring upper fixing hole 28;

the left curtain 10, the middle curtain 21 and the right curtain 26 are hollow sector structures, the left curtain 10 is provided with a left curtain front core hole 12-6 and a left curtain rear core hole 12-7, the right curtain 26 is provided with a right curtain front core hole 12-8 and a right curtain rear core hole 12-9, and the middle curtain 21 is provided with a middle curtain front core hole 12-4 and a middle curtain rear core hole 12-5;

when the curtain is installed and used, the left curtain 10 is positioned at the left, the middle curtain 21 is positioned at the middle, the right curtain 26 is positioned at the right, and the middle curtain 21 presses the arc plate surface 13 of the left curtain and the arc plate surface 13-1 of the right curtain to the lower side; the cambered surface of the left curtain cambered surface 13 is provided with a left upper curtain clamping strip 18 back to a left rear curtain core hole 12-7, the left upper curtain clamping strip 18 clamps a middle curtain left clamping strip 14 which is arranged on the inner side of the cambered surface of the middle curtain 21 and faces to the middle rear curtain core hole 12-5, and the middle curtain 21 can be pulled to move leftwards under the action of the clamping of the left upper curtain clamping strip 18 on the middle curtain left clamping strip 14; the right curtain arc plate surface 13-1 is provided with a right upper curtain clamping strip 24 back to the right curtain rear core hole 12-9, the right upper curtain clamping strip 24 clamps a middle curtain right clamping strip 27 which is arranged on the inner side of the arc surface of the middle curtain 21 and faces to the middle curtain rear core hole 12-5, and the middle curtain 21 can be pulled to move rightwards under the action of clamping the middle curtain right clamping strip 27 by the right upper curtain clamping strip 24; a left curtain lower clamping strip 8 facing to a left curtain rear fan core hole 12-7 and arranged below the left curtain arc plate surface 13 can clamp an under-machine T clamping strip 11 arranged on the air outlet table 34-3 and back to the left curtain rear fan core hole 12-7 for limiting, so that the left curtain arc plate surface 13 cannot leave the moving range of the left curtain arc plate surface to cause machine damage or air leakage; a right fan lower clamping strip 29 facing to a right fan curtain rear fan core hole 12-9 and arranged below the right fan curtain arc plate surface 13-1, wherein the right fan lower clamping strip 29 can clamp an onboard L clamping strip 25 arranged on the air outlet table 34-3 and back to the right fan curtain rear fan core hole 12-9, and after the onboard L clamping strip 25 clamped by the right fan lower clamping strip 29, the right fan curtain arc plate surface 13-1 is limited and cannot move leftwards continuously, so that the right fan curtain arc plate surface 13-1 cannot leave the moving range of the right fan curtain arc plate surface to cause machine damage or air leakage; the left upper clamping strip 18 can be clamped to a middle curtain left clamping strip 14 arranged on the inner side of a middle curtain arc panel 21-1, the right upper clamping strip 24 can be clamped to a middle curtain right clamping strip 27 arranged on the inner side of a middle curtain arc panel 21-1, and at the moment, the left curtain arc panel 13, the middle curtain arc panel 21-1 and the right curtain arc panel 13-1 are linked with one another to form a linkage mechanism capable of forming curtain seal for an air outlet 19 of the air outlet table 34-3, and the linkage mechanism of the curtain seal formed by the left curtain arc panel 13, the middle curtain arc panel 21-1 and the right curtain arc panel 13-1 is limited and cannot leave the area of the air outlet table 34-3 because the left curtain arc panel 13 can be clamped by an under-machine T clamping strip 11 of the air outlet table 34-3 and the right curtain arc panel 13-1 is clamped by an on-machine L clamping strip 25;

a front bolt component 12 of the curtain door sequentially penetrates through a front leaf core hole 12-4 of the middle leaf curtain, a front leaf core hole 12-6 of the left leaf curtain, a front leaf core hole 12-8 of the right leaf curtain and a front fixing hole 12-2 of the curtain door and then is locked by a locknut to form a first movable joint; a curtain door rear bolt component 12-1 sequentially penetrates through a middle curtain rear leaf center hole 12-5, a left curtain rear leaf center hole 12-7, a right curtain rear leaf center hole 12-9 and a curtain door rear fixing hole 12-3 and then is locked by a locknut to form a second movable joint; the axial leads of the front bolt component 12 and the rear bolt component 12-1 are arranged on the same straight line, and the left tension spring 7, the left curtain arc plate surface 13, the middle curtain 21, the right curtain arc plate surface 13-1 and the right tension spring 30 can be connected into a whole in linkage with each other to form a movable curtain door type seal for an air outlet table 34-3 rectangular air outlet 19;

the upper end of a left tension spring 7 is hooked with a left tension spring upper fixing hole 9 arranged on a left sash arc plate surface 13, the lower end of the left tension spring 7 is hooked with a left tension spring lower fixing hole 6, the upper end of a right tension spring 30 is hooked with a right tension spring upper fixing hole 28, the lower end of the right tension spring 30 is hooked with a right tension spring lower fixing hole 31, then the left sash arc plate surface 13 is pulled towards the left by the left tension spring 7, and the right sash arc plate surface 13-1 is pulled towards the right by the right tension spring 30;

the push rod assembly consists of a push rod fixing seat 2, a push rod fixing block 3, a push rod lower movable head 4 and a push rod 5, wherein one end of the push rod fixing seat 2 is fixed on the fan fixing seat 35, the other end of the push rod fixing seat 2 is provided with the push rod fixing block 3, and the push rod fixing block 3 is movably connected with the push rod lower movable head 4 to form a movable joint III; the middle sash curtain push rod 16 is arranged on the push rod fixing seat 17, the push rod fixing seat 17 is arranged on the middle sash curtain 21, and the upper ejector rod movable head 15 positioned at the upper end of the ejector rod 5 is movably connected with the middle sash curtain push rod 16 to form a movable joint IV; the push rod assembly can push the middle sash curtain push rod 16 to push the curtain door assembly to move up and down;

the ejector rod 5 can push the middle curtain 21 to move up and down, the direction of an air outlet enamel opening 40 arranged on the middle curtain 21 is changed, when a right curtain 26 and a right lower clamping strip 29 on the arc plate surface 13-1 of the right curtain are clamped to an on-machine L clamping strip 25 sector arranged on the sector, the middle curtain 21 already moves to the position of the lowest end, and when an off-machine T clamping strip 11 arranged on the arc plate surface 13 of the left curtain is clamped to an off-machine T clamping strip 11 arranged on the sector, the middle curtain 21 already moves to the position of the highest end; the profile of the center curtain outlet 40 of the center curtain 21 is within the profile of the wind table outlet 19 during the period when the center curtain 21 moves to the uppermost or lowermost position.

The machine body assembly is arranged on the machine base assembly, the curtain door assembly is arranged on an air outlet table 34-3 of the machine body assembly, the lower end of the push rod assembly is fixed on the machine base, and the upper end of the push rod assembly is movably connected with a middle curtain push rod 16 of the curtain door assembly; the front bolt component 12 of the curtain sequentially penetrates through a front sash center hole 12-4 of the middle sash curtain, a front sash center hole 12-6 of the left sash curtain, a front sash center hole 12-8 of the right sash curtain and a front fixing hole 12-2 of the curtain and is locked by a locknut, and the rear bolt component 12-1 of the curtain sequentially penetrates through a rear sash center hole 12-5 of the middle sash curtain, a rear sash center hole 12-7 of the left sash curtain, a rear sash center hole 12-9 of the right sash curtain and a rear fixing hole 12-3 of the curtain and is locked by a locknut; therefore, the left tension spring 7, the left curtain arc plate surface 13, the middle curtain 21, the right curtain arc plate surface 13-1 and the right tension spring 30 form a mutually linked whole to form a movable curtain door type seal for the air outlet 19 of the air outlet platform 34-3 rectangular.

3. The inner side of the arc panel of the middle curtain arc panel 21-1 is provided with a middle curtain left clamping strip 14 and a middle curtain right clamping strip 27 which are both in an L-shaped structure; the upper end of the left curtain arc plate surface 13 is provided with a left upper clamping strip 18 with a T-shaped structure, the orientations of the left upper clamping strip and the left upper clamping strip are the inner side and the outer side of the arc plate surface, and the lower end of the left curtain arc plate surface is provided with a left lower clamping strip 8, the orientation of the left lower clamping strip is the inner side of the arc plate surface; the upper end of the cambered surface of the right curtain cambered surface 13-1 is provided with a right fan upper clamping strip 24 with a T-shaped structure, the orientations of the right fan upper clamping strip 24 are the inner side and the outer side of the cambered surface, and the inner side of the lower end is provided with a right fan lower clamping strip 29 with an L-shaped structure, the orientation of the right fan lower clamping strip is the inner side of the cambered surface; the lower T-shaped clamping strip 11 is positioned at the same side of the air outlet 19 of the air table close to the push rod assembly, and the lower T-shaped clamping strip 11 is of a T-shaped structure; the onboard L-shaped clamping strip 25 is positioned on the other side of the air outlet 19 of the air duct far away from the push rod assembly, and the onboard L-shaped clamping strip 25 is of an L-shaped structure.

The machine body assembly is characterized in that the part above the fan shaft 32 is an air outlet table 34-3, the air outlet table 34-3 is a nearly semi-cylindrical fan-shaped body, a left tension spring lower fixing hole 6, a machine lower T-shaped clamping strip 11, an air outlet table 19, a machine upper L-shaped clamping strip 25 and a right tension spring lower fixing hole 31 of the machine body assembly are all located on the periphery of the air outlet table 19 of the fan volute plate 33, the lower side of the fan-shaped body of the air outlet table is provided with the left tension spring lower fixing hole 6, the upper side of the fan-shaped body of the air outlet table is provided with the right tension spring lower fixing hole 31, and the middle of the arc surface of the fan-shaped body is provided with the air outlet table 19.

The machine body assembly is provided with a front fan side plate 34, a rear fan side plate 34-2 and a front side plate and a rear side plate, the outer contours of the front side plate and the rear side plate are similar to 8 shapes and are in mirror symmetry with each other, a large hole and a small hole are formed in the middle of the two side plates, and side plate reinforcing ribs 34-1 are arranged on the front fan side plate 34 and the rear fan side plate 34-2 to increase the strength of the side plates.

The fan front side plate 34, the fan volute plate 33 and the fan rear side plate 34-2 form a centrifugal air cavity 37-1, the diameter of the centrifugal impeller 37 is smaller than that of the air inlet 38, and the centrifugal impeller 37 is placed into the centrifugal air cavity 37-1 from the air inlet 38 and is fixedly installed at the rear end of the fan shaft 32.

Left side curtain arc plate face 13, well curtain 21 and right curtain 26, right side curtain arc plate face 13-1 be hollow sector structure, left side curtain arc plate face 13 is equipped with fan heart hole 12-6 before the left curtain and fan heart hole 12-7 behind the left curtain, right side curtain arc plate face 13-1 is equipped with fan heart hole 12-8 before the right curtain and fan heart hole 12-9 behind the right curtain, be equipped with fan heart hole 12-4 before the well curtain and fan heart hole 12-5 behind the well curtain on the well curtain 21.

The device has four movable joints: a front bolt component 12 of the curtain sequentially penetrates through a front sash core hole 12-4 of the middle sash curtain, a front sash core hole 12-6 of the left sash curtain, a front sash core hole 12-8 of the right sash curtain and a front fixing hole 12-2 of the curtain and is locked by a locknut to form a first movable joint; a rear bolt component 12-1 of the curtain sequentially penetrates through a rear sash center hole 12-5 of the middle sash curtain, a rear sash center hole 12-7 of the left sash curtain, a rear sash center hole 12-9 of the right sash curtain and a rear fixing hole 12-3 of the curtain and is locked by a locknut to form a second movable joint; one end of the ejector rod fixing seat 2 is fixed on the fan fixing seat 35, the other end of the ejector rod fixing seat 2 is provided with an ejector rod fixing block 3, and the ejector rod fixing block 3 is movably connected with an ejector rod lower movable head 4 to form a movable joint III; the middle sash curtain push rod 16 is arranged on the push rod fixing seat 17, the push rod fixing seat 17 is arranged on the middle sash curtain 21, and the upper ejector rod movable head 15 positioned at the upper end of the ejector rod 5 is movably connected with the middle sash curtain push rod 16 to form a movable joint IV; the axial lines of the front bolt component 12 for mounting the first movable joint and the rear bolt component 12-1 for mounting the second movable joint are on the same straight line, and the left tension spring 7, the left curtain arc plate surface 13, the middle curtain 21, the right curtain arc plate surface 13-1 and the right tension spring 30 can be connected into a linkage whole to form a movable curtain door type seal for the air outlet platform 34-3 rectangular air outlet 19; the push rod assembly can push the middle leaf curtain push rod 16 on the curtain door assembly to move the curtain door assembly up and down through the third movable joint and the fourth movable joint.

After the curtain door type turning centrifugal fan rotates, air enters the centrifugal air cavity 37-1 from the air inlet 38, is thrown to the inner wall of a fan volute plate 33 of the fan body assembly by centrifugal force generated by the rotating centrifugal impeller 37 to form certain air pressure, is guided to the air outlet table 34-3 along the volute plate 3, and is ejected out of the centrifugal fan body at high speed through the curtain door assembly; the ejector rod 5 can push the middle curtain 21 to move up and down, so that the direction of the air outlet enamel opening 40 arranged on the middle curtain 21 is changed, and the purpose of continuously changing the air outlet direction is achieved.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims (7)

1. The utility model provides a curtain door diversion centrifugal fan, includes and has frame assembly, organism assembly, curtain door assembly and push rod assembly, the organism assembly is established on the frame assembly its characterized in that: the curtain door assembly comprises a left tension spring (7), a left curtain (10), a front curtain door bolt component (12), a rear curtain door bolt component (12-1), a left curtain arc plate surface (13), a right curtain arc plate surface (13-1), an upper ejector rod movable head (15), a middle curtain push rod (16), an air outlet enamel surface (20), a middle curtain (21), a fan air outlet (22), an air outlet switching part (23), a right curtain (26) and a right tension spring (30);

a middle curtain arc panel (21-1) is arranged on the middle curtain (21), a middle curtain air outlet (40) is arranged in the center of the middle curtain arc panel (21-1), an air outlet transition part (23) is arranged on the middle curtain air outlet (40), an air outlet enamel surface (20) is arranged on the air outlet transition part (23), and a fan air outlet (22) is formed by a central hole of the air outlet enamel surface (20);

the left curtain (10) is provided with a left curtain front core hole (12-6) and a left curtain rear core hole (12-7), the right curtain (26) is provided with a right curtain front core hole (12-8) and a right curtain rear core hole (12-9), and the middle curtain (21) is provided with a middle curtain front core hole (12-4) and a middle curtain rear core hole (12-5);

the middle curtain (21) is arranged between the left curtain (10) and the right curtain (26), and the left curtain arc plate surface (13) and the right curtain arc plate surface (13-1) are pressed below by the middle curtain (21); the cambered surface of the left curtain arc plate surface (13) is provided with a left upper clamping strip (18) back to a left curtain rear sash center hole (12-7), the cross section of the left upper clamping strip (18) is of a T-shaped structure, the inner side of the arc plate of the middle curtain arc plate (21-1) is provided with a middle curtain left clamping strip (14), and the left upper clamping strip (18) clamps the middle curtain left clamping strip (14); the right curtain arc plate surface (13-1) is provided with a right upper curtain clamping strip (24) back to a right rear curtain core hole (12-9), the cross section of the right upper clamping strip (24) is of a T-shaped structure, the inner side of the arc plate of the middle curtain arc plate (21-1) is provided with a right middle curtain clamping strip (27), and the right upper clamping strip (24) clamps the right middle curtain clamping strip (27); a left curtain lower clamping strip (8) is arranged at the lower end of the left curtain arc plate surface (13), and the left curtain lower clamping strip (8) can clamp a machine lower T-shaped clamping strip (11) on the air outlet table (34-3); a right fan lower clamping strip (29) of an L-shaped structure is arranged on the inner side of the lower end of the cambered surface of the right fan curtain cambered surface (13-1), and the right fan lower clamping strip (29) can clamp an onboard L clamping strip (25) arranged on the air outlet table (34-3);

the left curtain (10), the middle curtain (21) and the right curtain (26) are connected through a front curtain bolt component (12) and a rear curtain bolt component (12-1);

a left tension spring upper fixing hole (9) is formed in the lower end of the outer side of the arc plate surface of the left fan curtain arc plate surface (13), a left tension spring upper fixing hole (9) is formed in the upper end of the left tension spring (7), a left tension spring lower fixing hole (6) and a right tension spring lower fixing hole (31) are formed in the machine body assembly, the lower end of the left tension spring (7) hooks the left tension spring lower fixing hole (6), a right tension spring upper fixing hole (28) is formed in the lower end of the outer side of the arc plate surface of the right fan curtain arc plate surface (13-1), the upper end of the right tension spring (30) hooks the right tension spring upper fixing hole (28), and the lower end of the right tension spring (30) hooks the right tension spring lower fixing hole (31);

the push rod assembly comprises a push rod fixing seat (2) and a push rod (5), the push rod fixing seat (2) is fixed on a fan fixing seat (35), the push rod fixing seat (2) is connected with a push rod fixing block (3), and the push rod fixing block (3) is hinged with a push rod lower movable head (4); the utility model discloses a curtain, including ejector pin, activity head (4) and ejector pin (5), ejector pin (5) output is connected with activity head (15) on the ejector pin, well fan curtain (21) are provided with push rod fixing base (17), push rod fixing base (17) are connected with well fan curtain push rod (16), activity head (15) are articulated with well fan curtain push rod (16) on the ejector pin.

2. The curtain door turning centrifugal fan according to claim 1, characterized in that: the base assembly comprises a fan fixing base (35), a base fixing hole (1) used for fixing the base assembly is formed in the fan fixing base (35), and the fan fixing base (35) is connected with a bearing fixing base (36) connected with the base assembly.

3. The curtain door turning centrifugal fan according to claim 2, characterized in that: the machine body assembly comprises a left tension spring lower fixing hole (6), a machine lower T-shaped clamping strip (11), a wind table air outlet (19), a machine upper L-shaped clamping strip (25), a right tension spring lower fixing hole (31), a fan shaft (32), a fan worm plate (33), a fan front side plate (34), a fan rear side plate (34-2), an air outlet table (34-3), a centrifugal impeller (37) and a centrifugal air cavity (37-1);

an impeller end shaft hole (37-2) is formed in the middle of the front side plate (34) of the fan, and an air inlet (38) is formed in the middle of the rear side plate (34-2) of the fan; the fan front side plate (34) is welded and fixed with the bearing fixing seat (36), the fan rear side plate (34-2) is welded and fixed with the fan fixing seat (35), and the cross section of the fan worm plate (33) is completely the same as the outer contours of the fan front side plate (34) and the fan rear side plate (34-2); the port of the fan worm plate (33) forms an 8-shaped special-shaped cylindrical body together with a fan front side plate (34) and a fan rear side plate (34-2) respectively, the middle lower part of the special-shaped cylindrical body is a centrifugal air cavity (37-1), the upper part of the special-shaped cylindrical body is an air outlet table (34-3), the fan worm plate (33) is provided with an air table air outlet (19) forming the air outlet table (34-3), and the air outlet table (34-3) is positioned above the fan shaft (32);

the fan shaft (32) is fixed on the bearing fixing seat (36), the fan front side plate (34) is provided with an impeller end shaft hole (37-2) and a curtain door front fixing hole (12-2), the fan rear side plate (34-2) is provided with an air inlet (38) and a curtain door rear fixing hole (12-3), the circle centers of the impeller end shaft hole (37-2) and the air inlet (38) are both on the axis of the fan shaft (32), and the axis of the fan shaft (32) is perpendicular to the fan front side plate (34) and the fan rear side plate (34-2); a belt pulley (39) is arranged at the front end of the fan shaft (32), the rear end of the fan shaft (32) extends into the centrifugal air cavity (37-1), and the centrifugal impeller (37) is placed into the centrifugal air cavity (37-1) from the air inlet (38) and is fixedly installed at the rear end of the fan shaft (32); the front curtain door fixing hole (12-2) and the rear curtain door fixing hole (12-3) are formed in the circle center of a sector of the fan-shaped air outlet table (34-3), and the connecting line of the circle centers of the front curtain door fixing hole (12-2) and the rear curtain door fixing hole (12-3) is parallel to the axial lead of the fan shaft (32);

the left tension spring lower fixing hole (6), the under-machine T-shaped clamping strip (11), the on-machine L-shaped clamping strip (25) and the right tension spring lower fixing hole (31) are all located on the periphery of an air outlet (19) of a fan volute plate (33), the left tension spring lower fixing hole (6) is arranged on the lower side of a fan-shaped columnar body of an air outlet table (34-3), and the right tension spring lower fixing hole (31) is arranged on the upper side of the fan-shaped columnar body;

the left tension spring lower fixing hole (6) and the under-machine T-shaped clamping strip (11) are arranged on a fan worm plate (33) which is positioned on one side of the air outlet (19) of the air table and close to the same side of the push rod assembly, and the under-machine T-shaped clamping strip (11) is of a T-shaped structure; the L-shaped clamping strip (25) and the right tension spring lower fixing hole (31) are arranged on a fan worm plate (33) located on the other side of the air outlet (19) of the air table far away from the push rod assembly, and the L-shaped clamping strip (25) is of an L-shaped structure.

4. The curtain door turning centrifugal fan according to claim 1, characterized in that: the front bolt component (12) of the curtain door sequentially penetrates through a center hole (12-4) of a front sash of the middle sash, a center hole (12-6) of a front sash of the left sash, a center hole (12-8) of a front sash of the right sash and a front fixing hole (12-2) of the curtain door and then is locked by a locknut, and the rear bolt component (12-1) of the curtain door sequentially penetrates through a center hole (12-5) of a rear sash of the middle sash, a center hole (12-7) of a rear sash of the left sash, a center hole (12-9) of a rear sash of the right sash and a rear fixing hole (12-3) of the curtain door and then is locked by a locknut; the left tension spring (7), the left curtain arc plate surface (13), the middle curtain (21), the right curtain arc plate surface (13-1) and the right tension spring (30) form a whole which is mutually linked and sealed to the movable curtain door type of the air outlet (19) of the air table.

5. The curtain door turning centrifugal fan according to any one of claims 1 to 4, wherein: the outer contours of a front fan side plate (34) and a rear fan side plate (34-2) of the machine body assembly are in a shape like a Chinese character '8', the outer contours are in mirror symmetry with each other, and side plate reinforcing ribs (34-1) are arranged on the front fan side plate (34) and the rear fan side plate (34-2).

6. The curtain door turning centrifugal fan as claimed in claim 5, wherein: the fan front side plate (34), the fan volute plate (33) and the fan rear side plate (34-2) form a centrifugal air cavity (37-1).

7. The curtain door turning centrifugal fan as claimed in claim 5, wherein: the left fan curtain arc plate surface (13), the middle fan curtain (21), the right fan curtain (26) and the right fan curtain arc plate surface (13-1) are of hollow fan-shaped structures.

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