阅读说明：本技术 换气扇壳体及其制造方法 (Ventilation fan shell and manufacturing method thereof ) 是由 吕锋平 于 2020-12-18 设计创作，主要内容包括：本发明公开了换气扇壳体及其制造方法,包括左侧翼板、右侧翼板和导风箱体,左侧翼板上设置有进风口,右侧翼板上设置有电机安装孔和电机定位机构,导风箱体的侧面和顶面分别设置有第一出风口和第二出风口,导风箱体内设置有集风腔、导流腔、第一出风通道和第二出风通道,集风腔通过导流腔连通第一出风通道和第二出风通道,第一出风通道和第二出风通道分别与第一出风口和第二出风口连通,第一出风通道和第二出风通道之间设置有密封机。其方法包括：左侧翼板加工、右侧翼板加工、导风箱体加工和壳体装配。本发明不仅便于换气扇可以的快速安装,而且可以根据实际安装要求选择相应的出风口,密封效果好,噪音低,安装拆卸灵活方便。(The invention discloses a ventilation fan shell and a manufacturing method thereof, and the ventilation fan shell comprises a left wing plate, a right wing plate and a wind guide box body, wherein an air inlet is arranged on the left wing plate, a motor mounting hole and a motor positioning mechanism are arranged on the right wing plate, a first air outlet and a second air outlet are respectively arranged on the side surface and the top surface of the wind guide box body, a wind collecting cavity, a flow guide cavity, a first air outlet channel and a second air outlet channel are arranged in the wind guide box body, the wind collecting cavity is communicated with the first air outlet channel and the second air outlet channel through the flow guide cavity, the first air outlet channel and the second air outlet channel are respectively communicated with the first air outlet and the second air outlet, and a sealing machine is arranged. The method comprises the following steps: the method comprises the steps of left wing plate processing, right wing plate processing, air guide box body processing and shell assembling. The invention not only facilitates the rapid installation of the ventilator, but also can select the corresponding air outlet according to the actual installation requirement, and has good sealing effect, low noise and flexible and convenient installation and disassembly.)

1. Scavenger fan casing, its characterized in that: the wind guide box comprises a left wing plate, a right wing plate and a wind guide box body, wherein the left wing plate and the right wing plate are symmetrically arranged at two sides of the wind guide box body, an air inlet is arranged on the left wing plate, a motor mounting hole and a motor positioning mechanism are arranged on the right wing plate, the motor positioning mechanism is positioned at the outer side of the motor mounting hole, a first air outlet and a second air outlet are respectively arranged at the side surface and the top surface of the wind guide box body, a wind collecting cavity, a flow guide cavity, a first air outlet channel and a second air outlet channel are arranged in the wind guide box body, the wind collecting cavity is communicated with the first air outlet channel and the second air outlet channel through the flow guide cavity, the wind collecting cavity is communicated with the air inlet, the first air outlet channel and the second air outlet channel are respectively communicated with the first air outlet and the second air outlet channel, and a sealing mechanism is arranged between the first air, the air inlet is provided with an air inlet flange, louver blades are arranged in the air inlet flange, the motor positioning mechanism comprises an upper positioning plate, a lower positioning plate and a telescopic mechanism, the upper positioning plate and the lower positioning plate are connected through the telescopic mechanism, the upper positioning plate is matched with the lower positioning plate, lug plates are arranged at two ends of the upper positioning plate and at two ends of the lower positioning plate, and the lug plates are fixedly connected through bolts.

2. The ventilator housing of claim 1, wherein: telescopic machanism includes dead lever, dwang and telescopic link, the perpendicular fixed connection of dead lever is in on the right side pterygoid lamina, the dwang rotates to be connected go up the spacer with on the lower spacer, the one end fixed connection of dwang the telescopic link, the telescopic link with threaded connection between the dead lever.

3. The ventilator housing of claim 1, wherein: the first air outlet and the second air outlet are respectively provided with a first air outlet flange and a second air outlet flange, the first air outlet flange and the second air outlet flange are respectively provided with an anti-reflux mechanism, the anti-reflux mechanism comprises two semicircular plates and two first rotating shafts, and the semicircular plates are rotatably connected in the first air outlet flange and the second air outlet flange through the first rotating shafts.

4. The ventilator housing of claim 1, wherein: sealing mechanism includes closing plate, second pivot and knob, the closing plate passes through connecting rod fixed connection the second pivot, the knob is located the tip of second pivot, just the knob is located the outside of left side pterygoid lamina, the length of closing plate is greater than first air-out passageway with the internal diameter of second air-out passageway.

5. The ventilator housing of claim 4, wherein: the air guide plate is characterized in that guide grooves are symmetrically formed in the outer side surface of the sealing plate, a limiting column is arranged on one side, communicated with the guide cavity, of the first air outlet channel and the second air outlet channel, first limiting blocks are symmetrically arranged on the limiting column and matched with the guide grooves, a second limiting block is arranged on one side, intersected with the second air outlet channel, of the first air outlet channel and the second air outlet channel, and the second limiting blocks are matched with the guide grooves.

6. The method for manufacturing the ventilator housing according to any of the claims 1 to 5, comprising the steps of:

1) left side panel processing

a. Firstly, determining the size of a left wing plate according to design requirements, forming the required left wing plate by forging and pressing, polishing the surface of the left wing plate, flanging outwards along the edge of the left wing plate to ensure that the flanging is mutually vertical to the left wing plate, and symmetrically arranging mounting grooves along the flanging;

b. then, an air inlet is formed along the left wing plate, an air inlet flange with a proper size is selected according to the size of the air inlet, and louver blades are uniformly arranged along the inner side surface of the air inlet flange;

c. then fixedly mounting the processed air inlet flange on the left wing plate, and forming a through hole for mounting a knob on the left wing plate according to design requirements;

2) machining of right wing plate

a. Firstly, determining the size of a right wing plate according to the size of a left wing plate, forming a required right wing plate through forging and pressing, polishing the surface of the right wing plate, flanging outwards along the edge of the right wing plate to ensure that the flanging is mutually vertical to the right wing plate, and symmetrically arranging mounting grooves along the flanging;

b. then, a motor mounting hole is formed in the right wing plate, and the size of the motor positioning mechanism is determined according to the size of the motor mounting hole;

c. processing corresponding upper and lower positioning sheets, uniformly installing fixed rods on the outer side of a right wing plate along the circumferential direction of the motor installation hole, uniformly installing rotating rods on the upper and lower positioning sheets, fixedly connecting the rotating rods with telescopic rods, rotating the rotating rods to connect the telescopic rods with the fixed rods, and fixedly connecting the upper and lower positioning sheets with the lower positioning sheets through bolts when the upper and lower positioning sheets are moved to the same vertical plane;

3) processing of air guide box body

a. Firstly, determining the size of an air guide box body according to the sizes of a left wing plate and a right wing plate, processing the corresponding air guide box body, determining the sizes of an air collecting cavity, a flow guide cavity, a first air outlet channel and a second air outlet channel along the inside of the air guide box body, and processing the corresponding air collecting cavity, flow guide cavity, first air outlet channel and second air outlet channel;

b. then, a limiting column is arranged along one side of the first air outlet channel and the second air outlet channel, which is connected with the flow guide cavity, first limiting blocks are arranged along the limiting column in an up-down symmetrical mode, and second limiting blocks are arranged along the side, which is intersected with the first air outlet channel and the second air outlet channel, in an up-down symmetrical mode, so that the heights of the first limiting blocks and the second limiting blocks are kept consistent;

c. determining the size of a sealing plate according to the sizes of the first air outlet channel and the second air outlet channel, processing the corresponding sealing plate and the second rotating shaft, symmetrically forming guide grooves on the outer arc side surface of the sealing plate, and fixedly connecting the sealing plate with the second rotating shaft through a connecting rod;

d. finally, processing a first air outlet flange and a second air outlet flange according to the sizes of the first air outlet and the second air outlet, and symmetrically installing semicircular plates along the inner sides of the first air outlet flange and the second air outlet flange to enable the semicircular plates to be rotatably connected with the first air outlet flange and the second air outlet flange through a first rotating shaft;

4) housing assembly

a. Firstly, welding and fixing the inner side surfaces of the air guide box body and the right wing plate, sealing, and mounting the processed sealing mechanism into the air guide box body to enable one end of a second rotating shaft to be rotatably connected to the right wing plate;

b. then welding the left wing plate on the other side of the air guide box body, sealing the air guide box body, enabling the other end of the second rotating shaft to penetrate through the through hole in the left wing plate, and installing a knob at the end part of the second rotating shaft, wherein the knob is positioned on the outer side of the left wing plate;

c. and finally, installing a motor and a fan according to the requirement, and carrying out limiting and fixing through a motor positioning mechanism.

Technical Field

The invention relates to a ventilation fan shell and a manufacturing method thereof.

Background

The ventilation fan is a kind of air conditioning appliance, also called as ventilation fan, which uses electric fan blades of a motor to rotate and drive airflow to exchange indoor and outdoor air.

The ventilator in the prior art generally adopts an air inlet to correspond to an air outlet, so that the mounting requirements of multiple angles cannot be met in the actual mounting process, the practicability is poor, and the motor cannot be positioned.

Disclosure of Invention

The invention aims to provide the technical scheme of the ventilator shell and the manufacturing method thereof aiming at the defects in the prior art, the mounting stability and the reliability of the motor can be improved through the design of the motor positioning mechanism, the mounting and the dismounting of the motor are convenient, the corresponding air outlet can be selected according to the design of a plurality of air outlets, the mounting flexibility of the ventilator is greatly improved, meanwhile, the rest air outlets can be sealed through the sealing mechanism, the corresponding air outlet is kept to be conducted, the manufacturing method has simple steps, the rapid mounting of the ventilator is convenient, the corresponding air outlet can be selected according to the actual mounting requirement, the sealing effect is good, the noise is low, and the mounting and the dismounting are flexible and convenient.

In order to solve the technical problems, the invention adopts the following technical scheme:

scavenger fan casing, its characterized in that: the wind guide box comprises a left wing plate, a right wing plate and a wind guide box body, wherein the left wing plate and the right wing plate are symmetrically arranged on two sides of the wind guide box body, an air inlet is formed in the left wing plate, a motor mounting hole and a motor positioning mechanism are formed in the right wing plate, the motor positioning mechanism is positioned outside the motor mounting hole, a first air outlet and a second air outlet are respectively formed in the side surface and the top surface of the wind guide box body, a wind collecting cavity, a flow guide cavity, a first air outlet channel and a second air outlet channel are formed in the wind guide box body, the wind collecting cavity is communicated with the first air outlet channel and the second air outlet channel through the flow guide cavity, the wind collecting cavity is communicated with the air inlet, the first air outlet channel and the second air outlet channel are respectively communicated with the first air outlet; the design through motor positioning mechanism can improve the installation stability and the reliability of motor, and the installation of the motor of being convenient for is dismantled, and the design of a plurality of air outlets can select corresponding air outlet according to the requirement of actual installation, has improved the flexibility of scavenger fan installation greatly, and remaining air outlet can seal through sealing mechanism simultaneously, and it can to keep corresponding air outlet to switch on.

Furthermore, an air inlet flange is arranged on the air inlet, and louver blades are arranged in the air inlet flange, so that the louver blades can be designed to prevent larger impurities from entering the inside of the ventilating fan to cause blockage.

Further, motor positioning mechanism includes the spacer, spacer and telescopic machanism down, it all connects the right flank board through telescopic machanism with spacer down to go up the spacer, go up spacer and spacer phase-match down, the both ends of going up spacer and spacer all are provided with the otic placode, through bolt fixed connection between two adjacent otic placodes, through the design of last spacer and spacer down, can carry out the clamping location to the motor, the stability and the reliability of motor installation are improved, convenient to install and dismantle, otic placode and bolt can realize going up the spacer and fix down between the spacer, avoid causing wearing and tearing to the surface of motor, the spacer can be adjusted to telescopic machanism, interval between spacer and the right flank board down, satisfy the installation requirement of not unidimensional motor.

Further, telescopic machanism includes dead lever, dwang and telescopic link, and the perpendicular fixed connection of dead lever is on right flank board, and the dwang rotates to be connected on last spacer and lower spacer, and the one end fixed connection telescopic link of dwang, threaded connection between telescopic link and the dead lever can drive the telescopic link through rotatory dwang and rotate in step, and then can make the telescopic link along the telescopic movement of dead lever, spacing, use nimble convenient and fast.

Further, be provided with first air outlet flange and second air outlet flange on first air outlet and the second air outlet respectively, all be provided with on first air outlet flange and the second air outlet flange and prevent mechanism against the current, prevent that mechanism against the current includes two semicircle boards and two first pivots, the semicircle board rotates through first pivot and connects in first air outlet flange and second air outlet flange, be convenient for be connected with the air-out pipeline through the design of first air outlet flange and second air outlet flange, improve sealing performance, prevent against the current mechanism and can avoid causing the suck-back, when scavenger fan during operation, the semicircle board is opened under the effect of wind power, be convenient for discharge indoor air, when the scavenger fan is out of work, the semicircle board can seal the air outlet, avoid outside dust impurity to get into indoor through the scavenger fan.

Further, sealing mechanism includes the closing plate, second pivot and knob, the closing plate passes through connecting rod fixed connection second pivot, the tip of second pivot is located to the knob, and the knob is located the outside of left side pterygoid lamina, the length of closing plate is greater than the internal diameter of first air-out passageway and second air-out passageway, after having confirmed to use corresponding air outlet, it is rotatory to rotate, make the second pivot drive the closing plate through the connecting rod with the air-out passageway of opposite side seal can, the length of closing plate is great simultaneously, can improve sealed effect, noise reduction.

Further, the symmetry is provided with the guide slot on the lateral surface of closing plate, one side that first air-out passageway and second air-out passageway and water conservancy diversion chamber communicate is provided with spacing post, the symmetry is provided with first stopper on the spacing post, first stopper and guide slot phase-match, first air-out passageway is provided with the second stopper with the crossing one side of second air-out passageway, second stopper and guide slot phase-match, design through spacing post not only can block the closing plate, and sealing performance has been improved, first stopper and second stopper can be spacing to the guide slot, the stability and the reliability that the closing plate removed have been improved.

The manufacturing method of the ventilation fan shell is characterized by comprising the following steps:

1) left side panel processing

a. Firstly, the size of a left wing plate is determined according to design requirements, the required left wing plate is formed by forging and pressing, the surface of the left wing plate is polished, the flange is turned outwards along the edge of the left wing plate, the flange and the left wing plate are ensured to be mutually vertical, and mounting grooves are symmetrically formed along the flange, so that the mounting stability and reliability of the ventilating fan are improved;

b. then, an air inlet is formed along the left wing plate, an air inlet flange with a proper size is selected according to the size of the air inlet, and louver blades are uniformly arranged along the inner side surface of the air inlet flange, so that the ventilation fan can be protected;

c. then, the processed air inlet flange is fixedly arranged on the left wing plate, and a through hole for installing a knob is formed in the left wing plate according to design requirements, so that a sealing mechanism is convenient to install, the adjustment of the sealing mechanism is convenient, and the installation flexibility of the ventilating fan is improved;

2) machining of right wing plate

a. Firstly, the size of a right wing plate is determined according to the size of a left wing plate, the required right wing plate is formed through forging and pressing, the surface of the right wing plate is polished, flanging is carried out towards the outside along the edge of the right wing plate, the flanging and the right wing plate are ensured to be mutually vertical, and mounting grooves are symmetrically formed along the flanging, so that the mounting stability and reliability of the ventilating fan are improved;

b. then, a motor mounting hole is formed in the right wing plate, the size of the motor positioning mechanism is determined according to the size of the motor mounting hole, and the stability of motor mounting is improved;

c. processing corresponding upper and lower positioning sheets, uniformly installing fixed rods on the outer side of a right wing plate along the circumferential direction of a motor installation hole, uniformly installing rotating rods on the upper and lower positioning sheets, fixedly connecting the rotating rods with the telescopic rods, rotating the rotating rods to connect the telescopic rods with the fixed rods, and fixedly connecting the upper and lower positioning sheets with the lower positioning sheets through bolts when the upper and lower positioning sheets are moved to the same vertical plane, so that the installation strength and stability of the motor are improved, and the motor is protected;

3) processing of air guide box body

a. Firstly, determining the size of an air guide box body according to the sizes of a left wing plate and a right wing plate, processing the corresponding air guide box body, determining the sizes of an air collecting cavity, a flow guide cavity, a first air outlet channel and a second air outlet channel along the inside of the air guide box body, and processing the corresponding air collecting cavity, flow guide cavity, first air outlet channel and second air outlet channel;

b. then, limiting columns are arranged along one side, connected with the diversion cavity, of the first air outlet channel and the second air outlet channel, first limiting blocks are arranged along the limiting columns in an up-down symmetrical mode, then second limiting blocks are arranged along the side, intersected with the first air outlet channel and the second air outlet channel, in an up-down symmetrical mode, so that the heights of the first limiting blocks and the second limiting blocks are consistent, the sealing plate can be blocked through the limiting columns, the sealing effect is improved, and the moving stability and reliability of the sealing plate are improved through the first limiting blocks and the second limiting blocks;

c. determining the size of a sealing plate according to the sizes of the first air outlet channel and the second air outlet channel, processing the corresponding sealing plate and the second rotating shaft, symmetrically arranging guide grooves on the outer arc side surface of the sealing plate, fixedly connecting the sealing plate with the second rotating shaft through a connecting rod, and driving the sealing plate to rotate through the second rotating shaft, so that the corresponding air outlet channel can be sealed, the use and the operation are flexible and convenient, and the connecting rod improves the connection strength and the stability between the sealing plate and the second rotating shaft;

d. finally, a corresponding first air outlet flange and a corresponding second air outlet flange are processed according to the sizes of the first air outlet and the second air outlet, and semicircular plates are symmetrically arranged along the inner sides of the first air outlet flange and the second air outlet flange, so that the semicircular plates are rotatably connected with the first air outlet flange and the second air outlet flange through a first rotating shaft, and the backflow prevention effect can be achieved;

4) housing assembly

a. Firstly, welding and fixing the inner side surfaces of the air guide box body and the right wing plate, sealing, and mounting the processed sealing mechanism into the air guide box body to enable one end of a second rotating shaft to be rotatably connected to the right wing plate;

b. then welding the left wing plate on the other side of the air guide box body, sealing the air guide box body, enabling the other end of the second rotating shaft to penetrate through the through hole in the left wing plate, and installing a knob at the end part of the second rotating shaft, wherein the knob is positioned on the outer side of the left wing plate;

c. and finally, installing a motor and a fan according to the requirement, and carrying out limiting and fixing through a motor positioning mechanism.

The manufacturing method has simple steps, is convenient for the rapid installation of the ventilator, can select the corresponding air outlet according to the actual installation requirement, and has good sealing effect, low noise and flexible and convenient installation and disassembly.

Due to the adoption of the technical scheme, the invention has the following beneficial effects:

1. the design of the motor positioning mechanism can improve the installation stability and reliability of the motor, and the motor can be conveniently installed and disassembled.

2. The design of a plurality of air outlets can select corresponding air outlet according to the requirement of actual installation, has improved the flexibility of scavenger fan installation greatly, and remaining air outlet can seal through sealing mechanism simultaneously, and it can to keep corresponding air outlet to switch on.

3. The manufacturing method has simple steps, is convenient for the rapid installation of the ventilator, can select the corresponding air outlet according to the actual installation requirement, and has good sealing effect, low noise and flexible and convenient installation and disassembly.

Description of the drawings:

the invention will be further described with reference to the accompanying drawings in which:

FIG. 1 is an effective view of a ventilator case according to the present invention and a method for manufacturing the same;

FIG. 2 is a schematic view of the connection between the motor positioning mechanism and the right wing plate according to the present invention;

FIG. 3 is a schematic structural view of an air guide box according to the present invention;

FIG. 4 is a schematic structural view of a sealing mechanism according to the present invention;

FIG. 5 is a schematic structural view of a spacing post according to the present invention;

FIG. 6 is a schematic diagram of the distribution of the second stopper according to the present invention.

In the figure: 1-left wing plate; 2-right wing plate; 3, a wind guide box body; 4-air inlet flange; 5-a first air outlet flange; 6-a second air outlet flange; 7-louver blades; 8-a semicircular plate; 9-a first rotating shaft; 10-knob; 11-motor mounting holes; 12-upper positioning sheet; 13-lower locating plate; 14-a fixation rod; 15-rotating rods; 16-a telescopic rod; 17-a wind collecting cavity; 18-a flow guide cavity; 19-a first air outlet channel; 20-a second air outlet channel; 21-a sealing mechanism; 22-a limit post; 23-a second shaft; 24-a sealing plate; 25-a connecting rod; 26-a guide groove; 27-a first stopper; 28-a second stopper; 29-ear plate; 30-bolt.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terms first, second and the like in the description and in the claims, and in the drawings, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

As shown in fig. 1 to 6, the ventilator casing of the present invention includes a left wing plate 1, a right wing plate 2 and a wind guiding box 3, wherein the left wing plate 1 and the right wing plate 2 are symmetrically disposed on two sides of the wind guiding box 3, an air inlet is disposed on the left wing plate 1, an air inlet flange 4 is disposed on the air inlet, louver blades 7 are disposed in the air inlet flange 4, and the louver blades 7 are designed to prevent relatively large impurities from entering the ventilator to cause blockage.

The right wing plate 2 is provided with a motor mounting hole 11 and a motor positioning mechanism, the motor positioning mechanism is positioned outside the motor mounting hole 11, the motor positioning mechanism comprises an upper positioning plate 12, a lower positioning plate 13 and a telescopic mechanism, the upper positioning plate 12 and the lower positioning plate 13 are both connected with the right wing plate 2 through the telescopic mechanism, the upper positioning plate 12 is matched with the lower positioning plate 13, two ends of the upper positioning plate 12 and the lower positioning plate 13 are both provided with lug plates 29, two adjacent lug plates 29 are fixedly connected through a bolt 30, through the design of the upper positioning plate 12 and the lower positioning plate 13, the motor can be clamped and positioned, the stability and reliability of motor mounting are improved, the mounting and dismounting are convenient, the lug plates 29 and the bolt 30 can realize the fixation between the upper positioning plate 12 and the lower positioning plate 13, the abrasion of the surface of the motor is avoided, the telescopic mechanism can adjust the distance between the upper positioning plate 12, the lower positioning plate 13 and the right wing plate 2, the mounting requirements of motors with different sizes are met. Telescopic machanism includes dead lever 14, dwang 15 and telescopic link 16, the perpendicular fixed connection of dead lever 14 is on right flank board 2, dwang 15 rotates to be connected on last spacer 12 and lower spacer 13, the one end fixed connection telescopic link 16 of dwang 15, threaded connection between telescopic link 16 and the dead lever 14, can drive telescopic link 16 synchronous rotation through rotatory dwang 15, and then can make telescopic link 16 along the telescopic movement of dead lever 14, the control interval, use nimble convenient and fast.

The side face and the top face of the air guide box body 3 are respectively provided with a first air outlet and a second air outlet, the first air outlet and the second air outlet are respectively provided with a first air outlet flange 5 and a second air outlet flange 6, the first air outlet flange 5 and the second air outlet flange 6 are respectively provided with an anti-reflux mechanism, the anti-reflux mechanism comprises two semicircular plates 8 and two first rotating shafts 9, the semicircular plates 8 are rotatably connected in the first air outlet flange 5 and the second air outlet flange 6 through the first rotating shafts 9, the anti-reflux mechanism is convenient to be connected with an air outlet pipeline through the design of the first air outlet flange 5 and the second air outlet flange 6, the sealing performance is improved, the anti-reflux mechanism can avoid suck-back, when the ventilating fan works, the semicircular plates 8 are opened under the action of wind force, the indoor air is convenient to be discharged, when the ventilating fan does not work, the semicircular plates 8 can seal the, prevent external dust and impurities from entering the room through the ventilation fan.

An air collecting cavity 17, a flow guide cavity 18, a first air outlet channel 19 and a second air outlet channel 20 are arranged in the air guide box body 3, the air collecting cavity 17 is communicated with the first air outlet channel 19 and the second air outlet channel 20 through the flow guide cavity 18, the air collecting cavity 17 is communicated with an air inlet, the first air outlet channel 19 and the second air outlet channel 20 are respectively communicated with a first air outlet and a second air outlet, a sealing mechanism 21 is arranged between the first air outlet channel 19 and the second air outlet channel 20, the sealing mechanism 21 comprises a sealing plate 24, a second rotating shaft 23 and a knob 10, the sealing plate 24 is fixedly connected with the second rotating shaft 23 through a connecting rod 25, the knob 10 is arranged at the end part of the second rotating shaft 23, the knob 10 is arranged at the outer side of the left wing plate 1, the length of the sealing plate 24 is larger than the inner diameters of the first air outlet channel 19 and the second air outlet channel 20, when the corresponding air outlet is determined to be used, the air outlet is rotated and rotated, so, meanwhile, the sealing plate 24 is longer, so that the sealing effect can be improved, and the noise can be reduced. The guide groove 26 is symmetrically arranged on the outer side surface of the sealing plate 24, one side of the first air outlet channel 19 and the second air outlet channel 20 communicated with the guide cavity 18 is provided with a limiting column 22, the limiting column 22 is symmetrically provided with a first limiting block 27, the first limiting block 27 is matched with the guide groove 26, one side of the first air outlet channel 19 intersected with the second air outlet channel 20 is provided with a second limiting block 28, the second limiting block 28 is matched with the guide groove 26, the sealing plate 24 can be blocked through the design of the limiting column 22, the sealing performance is improved, the first limiting block 27 and the second limiting block 28 can limit the guide groove 26, and the stability and the reliability of the movement of the sealing plate 24 are improved. The design through motor positioning mechanism can improve the installation stability and the reliability of motor, and the installation of the motor of being convenient for is dismantled, and the design of a plurality of air outlets can select corresponding air outlet according to the requirement of actual installation, has improved the flexibility of scavenger fan installation greatly, and remaining air outlet can seal through sealing mechanism 21 simultaneously, and it can to keep corresponding air outlet to switch on.

The manufacturing method of the ventilation fan shell is characterized by comprising the following steps:

1) left wing plate 1 processing

a. Firstly, the size of a left wing plate 1 is determined according to design requirements, the required left wing plate 1 is formed by forging and pressing, the surface of the left wing plate 1 is polished, the flange is turned outwards along the edge of the left wing plate 1, the flange and the left wing plate 1 are ensured to be mutually vertical, mounting grooves are symmetrically formed along the flange, and the mounting stability and reliability of the ventilation fan are improved;

b. then, an air inlet is formed along the left wing plate 1, an air inlet flange 4 with a proper size is selected according to the size of the air inlet, and louver blades 7 are uniformly arranged along the inner side surface of the air inlet flange 4, so that the ventilation fan can be protected;

c. then, the processed air inlet flange 4 is fixedly arranged on the left wing plate 1, and a through hole for installing the knob 10 is formed in the left wing plate 1 according to design requirements, so that the sealing mechanism 21 is convenient to install, the sealing mechanism 21 is convenient to adjust, and the installation flexibility of the ventilating fan is improved;

2) right side wing plate 2 processing

a. Firstly, the size of a right wing plate 2 is determined according to the size of a left wing plate 1, the right wing plate 2 is formed through forging and pressing, the surface of the right wing plate 2 is polished, the flange is turned outwards along the edge of the right wing plate 2, the flange and the right wing plate 2 are ensured to be mutually vertical, and mounting grooves are symmetrically formed along the flange, so that the mounting stability and reliability of the ventilation fan are improved;

b. then, a motor mounting hole 11 is formed in the right wing plate 2, the size of the motor positioning mechanism is determined according to the size of the motor mounting hole 11, and the stability of motor mounting is improved;

c. processing a corresponding upper locating plate 12 and a corresponding lower locating plate 13, uniformly installing a fixed rod 14 on the outer side of the right wing plate 2 along the circumferential direction of the motor installation hole 11, uniformly installing a rotating rod 15 on the upper locating plate 12 and the lower locating plate 13, fixedly connecting a telescopic rod 16 on the rotating rod 15, and rotating the rotating rod 15 to connect the telescopic rod 16 with the fixed rod 14, wherein when the upper locating plate 12 and the lower locating plate 13 are moved to the same vertical plane, the upper locating plate 12 and the lower locating plate 13 are fixedly connected through a bolt 30, so that the installation strength and the stability of the motor are improved, and the motor is protected;

3) machining of air guide box body 3

a. Firstly, determining the size of an air guide box body 3 according to the sizes of a left wing plate 1 and a right wing plate 2, processing the corresponding air guide box body 3, determining the sizes of an air collecting cavity 17, a flow guide cavity 18, a first air outlet channel 19 and a second air outlet channel 20 along the inside of the air guide box body 3, and processing the corresponding air collecting cavity 17, the flow guide cavity 18, the first air outlet channel 19 and the second air outlet channel 20, wherein the side surface and the top surface of the air guide box body 3 are respectively provided with a first air outlet and a second air outlet, so that the first air outlet and the second air outlet are respectively communicated with the first air outlet channel 19 and the second air outlet channel 20, and the air collected by the air collecting cavity 17 can be conveyed to the first air outlet channel 19 or the second air outlet channel 20 through the flow guide cavity;

b. then, a limiting column 22 is installed along one side of the first air outlet channel 19 and the second air outlet channel 20 connected with the flow guide cavity 18, a first limiting block 27 is installed along the limiting column 22 in an up-down symmetrical manner, and a second limiting block 28 is installed along the intersecting side of the first air outlet channel 19 and the second air outlet channel 20 in an up-down symmetrical manner, so that the heights of the pairs of the first limiting block 27 and the second limiting block 28 are kept consistent, the sealing plate 24 can be blocked through the limiting column 22, the sealing effect is improved, and the stability and the reliability of the movement of the sealing plate 24 are improved through the first limiting block 27 and the second limiting block 28;

c. then, the size of the sealing plate 24 is determined according to the sizes of the first air outlet channel 19 and the second air outlet channel 20, the corresponding sealing plate 24 and the second rotating shaft 23 are processed, the guide grooves 26 are symmetrically formed in the outer arc side surface of the sealing plate 24, the sealing plate 24 is fixedly connected with the second rotating shaft 23 through the connecting rod 25, the sealing plate 24 is driven to rotate through the second rotating shaft 23, the corresponding air outlet channel can be sealed, the use and the operation are flexible and convenient, and the connecting rod 25 improves the connection strength and the stability between the sealing plate 24 and the second rotating shaft 23;

d. finally, a corresponding first air outlet flange 5 and a corresponding second air outlet flange 6 are processed according to the sizes of the first air outlet and the second air outlet, and semicircular plates 8 are symmetrically arranged along the inner sides of the first air outlet flange 5 and the second air outlet flange 6, so that the semicircular plates 8 are rotatably connected with the first air outlet flange 5 and the second air outlet flange 6 through a first rotating shaft 9, and the anti-backflow effect can be achieved;

4) housing assembly

a. Firstly, welding and fixing the inner side surfaces of the air guide box body 3 and the right wing plate 2, sealing, and then installing the processed sealing mechanism 21 into the air guide box body 3 to ensure that one end of a second rotating shaft 23 is rotatably connected to the right wing plate 2;

b. then welding the left wing plate 1 on the other side of the air guide box body 3, sealing to enable the other end of the second rotating shaft 23 to penetrate through a through hole in the left wing plate 1, and installing a knob 10 at the end part of the second rotating shaft 23, wherein the knob 10 is positioned on the outer side of the left wing plate 1;

c. and finally, installing a motor and a fan according to the requirement, and carrying out limiting and fixing through a motor positioning mechanism.

The manufacturing method has simple steps, is convenient for the rapid installation of the ventilator, can select the corresponding air outlet according to the actual installation requirement, and has good sealing effect, low noise and flexible and convenient installation and disassembly.

The above is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any simple variations, equivalent substitutions or modifications based on the present invention to achieve substantially the same technical effects are within the scope of the present invention.