Air duct adjustable exhaust fan and air duct adjustable method

Abstract

The application belongs to the field of air conditioning devices, and discloses an adjustable air outlet fan and an adjustable air duct method. The adjustable air outlet fan comprises a shell assembly, a blade, a motor and a switch assembly, and the blade is installed on the motor. A wind cavity is formed in the middle of the shell assembly, the wind cavity comprises a first port and a second port, the motor is installed in the wind cavity, and a one-way conduction assembly is further arranged on the second port. An air duct is formed in the side of the shell assembly, one end of the air duct is communicated with the outside, the other end is communicated with the wind cavity, and the switch assembly controls the on-off of the air duct. When the motor rotates in a first direction, the one-way conduction assembly is opened, and air flows from the first port to the second port. When the motor rotates in a second direction, the one-way conduction assembly is closed, the switch assembly controls the conduction of the air duct, and air flows from the second port to the first port. The air outlet function and the air circulation function are realized, and the comfort is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of air conditioning devices, in particular to an air duct adjustable exhaust fan and an air duct adjustable method. BACKGROUND

[0002] Exhaust fans can be divided into household exhaust fans and industrial exhaust fans according to their purposes. Household exhaust fans are usually small-power exhaust fans, such as exhaust fans installed in bathrooms, which mainly discharge indoor odors to the outside. Industrial exhaust fans are usually large-power exhaust fans, which mainly discharge indoor air to the outside to achieve the effect of heat dissipation and ensure air flow.

[0003] Whether it is a household exhaust fan or an industrial exhaust fan, its function is relatively single, only having a one-way exhaust effect. If the outdoor environment is abnormally humid or dry, or the outdoor temperature is low, if the exhaust fan is normally turned on, it is easy to cause the indoor environment to be the same as the outdoor environment, which brings discomfort to people in the room. But if the exhaust fan is not turned on, it is easy to cause a sense of discomfort because the indoor air cannot circulate. SUMMARY

[0004] The purpose of the present application is to provide an air duct adjustable exhaust fan and an air duct adjustable method to realize the effects of exhaust and air circulation and improve comfort.

[0005] The technical scheme is as follows:

[0006] The air duct adjustable exhaust fan comprises a shell assembly, a blade, a motor and a switch assembly, the blade is installed on the motor; a wind cavity is formed in the middle of the shell assembly, the wind cavity comprises a first port and a second port, the motor is installed in the wind cavity, the second port is further provided with a one-way conduction assembly; an air duct is formed in the side of the shell assembly, one end of the air duct is in communication with the outside, the other end is in communication with the wind cavity, the switch assembly controls the on-off of the air duct; when the motor rotates in a first direction, the one-way conduction assembly is opened, air flows from the first port to the second port; when the motor rotates in a second direction, the one-way conduction assembly is closed, the switch assembly controls the conduction of the air duct, air flows from the second port to the first port.

[0007] In one embodiment, the blade is circumferentially limited and axially slidably installed on the output shaft of the motor, the sliding direction of the blade is along the direction of the line connecting the first port and the second port of the wind cavity; when the motor rotates in the first direction, the blade slides to trigger the switch assembly to close the air duct; when the motor rotates in the second direction, the blade slides in the opposite direction to trigger the switch assembly to close the air duct.

[0008] In one of the embodiments, the housing assembly comprises an outer housing and an air duct switch housing, the air duct switch housing is slidingly mounted on the housing assembly, and the switch assembly controls the sliding of the air duct switch housing.

[0009] In one of the embodiments, the outer housing is provided with a support seat in the air cavity, the motor is mounted in the middle of the support seat, and a receiving site is provided on the outer side of the support seat or the outer side of the motor; the switch assembly comprises a toggle lever, the middle of the toggle lever is rotationally connected to the receiving site, one end of the toggle lever is matched with the vane, and the other end of the toggle lever is matched with the air duct switch housing.

[0010] In one of the embodiments, the output shaft of the motor forms a guide column, and a limiting protrusion is further provided at the end of the guide column, and the vane is slidingly mounted on the guide column; when the motor rotates in the first rotation direction, the vane slides to the first port under the action of the reaction force and is limited by the limiting protrusion; when the motor rotates in the second rotation direction, the vane slides to the second port under the action of the reaction force.

[0011] In one of the embodiments, a ring groove is formed in the vane, and one end of the toggle lever is inserted into the ring groove to be matched with the vane.

[0012] In one of the embodiments, a sliding column is provided at the matching position of the outer housing and the air duct switch housing, the air duct switch housing is slidingly matched with the sliding column, the air duct switch housing is provided with a driving groove, and one end of the toggle lever is inserted into the driving groove to be matched with the air duct switch housing.

[0013] In one of the embodiments, the air duct switch housing comprises a card-in section and an outward extending section; the card-in section extends into the outer housing, and the air duct is formed by the gap between the card-in section and the outer housing; the outward extending section extends outward from the central position, and when the end of the card-in section or the outward extending section is attached to the outer housing, the air duct is closed, and when the end of the card-in section or the outward extending section is spaced from the outer housing, the air duct is opened.

[0014] In one of the embodiments, the air duct adjustable exhaust fan further comprises a protective net and a negative ion generator, the protective net is mounted at the first port, and the electrode of the negative ion generator is mounted on the protective net.

[0015] In one of the embodiments, the one-way conduction assembly comprises a plurality of wind blocking plates, and the upper end of each wind blocking plate is hingedly connected to the position of the second port.

[0016] The air duct adjustable method uses the air duct adjustable exhaust fan and comprises the following steps:

[0017] The exhaust program is started, the fan rotates along the first rotating direction, the blade rotates along the first rotating direction, air flows along the first port to the second port, and the one-way conducting assembly is opened;

[0018] The circulation program is started, the fan rotates along the second rotating direction, the blade rotates along the second rotating direction, the switch assembly controls the air duct to be conducted, the one-way conducting assembly is closed, air enters the air duct from the room and then enters the cavity, and finally is discharged from the room through the first port.

[0019] The technical scheme provided by the present application has the following advantages and effects:

[0020] The air duct adjustable exhaust fan can realize air exhaust function and air circulation function. When the air exhaust function is started, the motor is controlled to rotate in the first rotating direction, at this time the blade is driven to rotate, thereby driving air flow, at this time the one-way conducting assembly is opened, that is, the second port is opened, air flows from the first port to the second port, and the air exhaust function is completed. When the air circulation function needs to be started, the motor is controlled to rotate in the second rotating direction, at this time the one-way conducting assembly is closed, that is, the second port is closed, so the air duct needs to be adjusted to realize the air circulation function. When the motor rotates in the second rotating direction, the switch assembly controls the air duct to be conducted, so under the action of negative pressure, air in the room flows into the air cavity from the air duct, and finally is discharged through the first port, thereby completing the air circulation function. The exhaust fan can realize two functions, so the specific function can be controlled according to needs, which is beneficial to improve the use comfort of the user. Moreover, the two functions are realized by adjusting the air duct in the present scheme, so the cost can be effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a perspective structural schematic view of the air duct adjustable exhaust fan of the present application in the exhaust state;

[0022] Figure 2 is a perspective structural schematic view of the air duct adjustable exhaust fan of the present application in the circulation state; Figure 1 is a perspective view of the air duct adjustable exhaust fan of the present application in the circulation state;

[0023] Figure 3 is a side view of the air duct adjustable exhaust fan of the present application in the circulation state; Figure 1

[0024] Figure 4 is an enlarged structural schematic view of A in the air duct adjustable exhaust fan of the present application; Figure 2

[0025] Figure 5 is an enlarged structural schematic view of C in the air duct adjustable exhaust fan of the present application; Figure 2

[0026] Figure 6 ​​​is a perspective structure schematic diagram of the adjustable exhaust fan of the air duct in a circulating state of the present application;

[0027] Figure 7 is a perspective structure schematic diagram of the adjustable exhaust fan of the air duct in a circulating state of the present application; Figure 6 ;

[0028] Figure 8 is a perspective structure schematic diagram of the adjustable exhaust fan of the air duct in a circulating state of the present application; Figure 6 ;

[0029] BRIEF DESCRIPTION OF DRAWINGS

[0030] 10, housing assembly; 11, air cavity; 111, first port; 112, second port; 12, one-way conduction assembly; 121, wind baffle; 13, outer housing; 131, sliding column; 14, air duct switch shell; 141, driving groove; 142, clamping section; 143, outward extending section; 15, support seat; 151, receiving site; 16, air duct; 20, blade; 21, ring groove; 30, motor; 31, guide column; 40, switch assembly; 41, toggle lever; 50, protective net; 60, negative ion generator; 61, electrode. DETAILED DESCRIPTION

[0031] In order to facilitate the understanding of the present application, specific embodiments of the present application will be described in more detail below with reference to the accompanying drawings.

[0032] Unless specifically stated or otherwise defined, the "first, second" used herein is only used for distinguishing names, and does not represent a specific quantity or order.

[0033] Unless specifically stated or otherwise defined, the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0034] It should be noted that "fixed to", "connected to" herein can be directly fixed or connected to an element, or indirectly fixed or connected to an element.

[0035] As Figures 1 to 3 and Figures 6 to 8As shown, the air duct 16 adjustable exhaust fan comprises a housing assembly 10, a blade 20, a motor 30 and a switch assembly 40, the blade 20 is installed on the motor 30; the housing assembly 10 is provided with a wind cavity 11 in the middle, the wind cavity 11 comprises a first port 111 and a second port 112, the motor 30 is installed in the wind cavity 11, the second port 112 is further provided with a one-way conduction assembly 12; the housing assembly 10 is provided with an air duct 16 at the side, one end of the air duct 16 is communicated with the outside, the other end is communicated with the wind cavity 11, the switch assembly 40 controls the on-off of the air duct 16; when the motor 30 rotates in the first rotation direction, the one-way conduction assembly 12 is opened, air flows from the first port 111 to the second port 112; when the motor 30 rotates in the second rotation direction, the one-way conduction assembly 12 is closed, the switch assembly 40 controls the air duct 16 to be conducted, air flows from the second port 112 to the first port 111.

[0036] The air duct 16 adjustable exhaust fan can realize the air exhaust function and the air circulation function. When starting the air exhaust function, the motor 30 is controlled to rotate in the first rotation direction, at this time, the blade 20 is driven to rotate, thereby driving the air flow, at this time, the one-way conduction assembly 12 is opened, that is, the second port 112 is opened, air flows from the first port 111 to the second port 112, and the air exhaust to the outside is completed. When the air circulation function needs to be started, the motor 30 is controlled to rotate in the second rotation direction, at this time, the one-way conduction assembly 12 is closed, that is, the second port 112 is closed, so the air duct 16 needs to be adjusted to realize the air circulation function. When the motor 30 rotates in the second rotation direction, the switch assembly 40 controls the air duct 16 to be conducted, so under the action of negative pressure, the indoor air flows into the wind cavity 11 from the air duct 16, and finally is discharged through the first port 111, thereby completing the air circulation function. The exhaust fan can realize two functions, so the specific function can be controlled according to the need, which is beneficial to improve the use comfort of the user. Moreover, in the scheme, the two functions are realized by adjusting the air duct 16, so the cost can be effectively reduced.

[0037] It should be noted that the first rotation direction and the second rotation direction herein are opposite directions. The arrow direction in the figure indicates the air flow direction.

[0038] As Figure 3As shown, in particular in this embodiment, the one-way conducting assembly 12 includes a plurality of wind baffles 121, each of which is hingedly connected to the second port 112, and when the wind baffle 121 is lowered, the second port 112 is closed. When the second port 112 has an air flow trend flowing outward, the wind baffle 121 can be pushed open, thereby opening the second port 112. When the second port 112 forms a negative pressure, the wind baffle 121 cannot be turned inward due to the blocking of the shell assembly 10, so the second port 112 cannot be opened at this time, thereby realizing the self-adjusting one-way conducting function.

[0039] In other embodiments, the one-way conducting assembly 12 can be controlled by a small driving mechanism to control the rotation of the wind baffle 121 to open or close the second port 112. Here, no specific limitation is made, and it can be set according to the needs of use.

[0040] In order to better guide the wind and balance, the space in the wind cavity 11 in this embodiment is a cylindrical space.

[0041] As shown in Figure 2 and Figure 3 The blade 20 is circumferentially limited and axially slidably installed on the output shaft of the motor 30, and the sliding direction of the blade 20 is along the direction of the line connecting the first port 111 and the second port 112 of the wind cavity 11. When the motor 30 rotates in the first rotation direction, the sliding of the blade 20 triggers the switch assembly 40 to close the air duct 16. When the motor 30 rotates in the second rotation direction, the reverse sliding of the blade 20 triggers the switch assembly 40 to close the air duct 16. Here, the sliding of the blade 20 is used to trigger the switch assembly 40. The movement of the blade 20 here is a small range of movement, that is, the movement is controlled within the wind cavity 11, and through the movement of the blade 20, the working state of the switch assembly 40 is triggered.

[0042] In particular, as shown in Figures 2 to 3 The shell assembly 10 includes an outer shell 13 and an air duct switch shell 14, and the air duct switch shell 14 is slidably installed on the shell assembly 10, and the switch assembly 40 controls the sliding of the air duct switch shell 14. Here, the sliding of the air duct switch shell 14 is used to control whether the air duct 16 is opened or not, and the sliding mode is easy to control the direction.

[0043] See Figures 2 to 5As shown, the outer shell 13 is provided with a support seat 15 in the air cavity 11, the motor 30 is installed in the middle of the support seat 15, and the outer side of the support seat 15 or the outer side of the motor 30 is provided with a receiving site 151; the switch assembly 40 includes a toggle lever 41, the middle of the toggle lever 41 is rotationally connected to the receiving site 151, one end of the toggle lever 41 is matched with the blade 20, and the other end is matched with the air duct switch shell 14. The support seat 15 is fixedly connected to the outer shell 13, so that the support seat 15 is more firm, the motor 30 is installed in the middle of the support seat 15, the motor 30 rotates more evenly, and the unbalance problem is less likely to occur, and the shaking problem caused by eccentric rotation is reduced. The toggle lever 41 here is an important component for controlling whether the air duct 16 is closed or not, when the motor 30 starts, since the blade 20 can move on the support seat 15, the movement of the toggle lever 41 is driven, and the toggle lever 41 in turn drives the sliding of the air duct switch shell 14. Specifically, in the embodiment, the receiving site 51 is installed on the motor 30.

[0044] Specifically, the middle of the toggle lever 41 is rotationally connected to the receiving site 151, and due to the principle of lever, the two ends of the toggle lever 41 swing in opposite directions. As shown in Figure 2 and Figure 3 As shown, when the motor 30 is in the first rotation direction, under the pushing of the reaction force of the blade 20, the blade 20 moves to the first port 111, drives the end matched with the blade 20 to swing to the first port 111, and the other end of the toggle lever 41 swings to the second port 112, thereby driving the air duct switch shell 14 to slide to the second port 112, and closing the air duct 16. Conversely, as shown in Figure 7 and Figure 8 As shown, when the motor 30 is in the second rotation direction, under the pushing of the reaction force of the blade 20, the blade 20 moves to the second port 112, drives the end matched with the blade 20 to swing to the second port 112, and the other end of the toggle lever 41 swings to the first port 111, thereby driving the air duct switch shell 14 to slide to the first port 111, and opening the air duct 16; at this time, the second port 112 forms a negative pressure, air enters the air duct 16 under the action of the negative pressure and then enters the side of the second port 112, and finally is discharged from the first port 111. Specifically, the air duct 16 is in communication with the air cavity 11 on the side of the second port 112.

[0045] As shown in Figure 4As shown, the output shaft of the motor 30 forms a guide column 31, the end of the guide column 31 is also provided with a limiting protrusion, the blade 20 is slidingly installed on the guide column 31; when the motor 30 rotates in the first direction, the blade 20 is slidingly moved along the guide column 31 to the first port 111 under the action of the reaction force, and is limited by the limiting protrusion; when the motor 30 rotates in the second direction, the blade 20 is slidingly moved along the guide column 31 to the second port 112 under the action of the reaction force. The guide column 31 guides the sliding direction of the blade 20, and the guide column 31 is in the same direction as the axis direction of the air cavity 11, so that the blade 20 can only move along the axis direction of the air cavity 11 under the guidance of the guide column 31. Therefore, no matter whether the motor 30 rotates in the first direction or the second direction, the airflow driven by the rotation of the blade 20 driven by the motor 30 flows along the axis direction of the air cavity 11.

[0046] As shown in Figure 4 , a ring groove 21 is formed on the blade 20, and one end of the driving rod 41 is inserted into the ring groove 21 and matched with the blade 20. The matching of the ring groove 21 and the driving rod 41 can tolerate errors to some extent, and the precision requirement can be reduced during processing. In addition, small shaking is inevitable during the rotation of the fan, so the matching mode of the ring groove 21 is not a complete limiting matching relationship, and can tolerate the change of the matching position caused by small shaking.

[0047] As shown in Figure 5 , a sliding column 131 is arranged at the matching position of the outer shell 13 and the air duct switch shell 14, the air duct switch shell 14 is slidingly matched with the sliding column 131, the air duct switch shell 14 is provided with a driving groove 141, and one end of the driving rod 41 is inserted into the driving groove 141 and matched with the air duct switch shell 14. The sliding column 131 can guide the movement of the air duct switch shell 14, avoiding the accumulation of errors caused by repeated sliding and affecting the reset of sliding. Specifically, a sliding groove is arranged on the air duct switch shell 14, and the sliding groove is slidingly matched with the sliding column 131. The matching relationship between the driving groove 141 and the driving rod 41 is also a non-complete limiting matching relationship, which can tolerate the change of the matching position caused by small shaking. The non-complete limiting matching relationship here means that only when the driving groove 141 and the driving rod 41 are in contact, the matching relationship exists, and the rotary connection does not belong to it. Of course, this is only a specific setting mode, and it does not mean that this mode must be adopted.

[0048] As shown in Figure 7 and Figure 8As shown, the air duct switch shell 14 includes a card section 142 and an outward section 143; the card section 142 extends into the outer shell 13, and the air duct 16 is formed by the gap between the card section 142 and the outer shell 13; the outward section 143 extends away from the center position, and when the end of the card section 142 or the outward section 143 is attached to the outer shell 13, the air duct 16 is closed, and when the end of the card section 142 or the outward section 143 is spaced from the outer shell 13, the air duct 16 is opened, and the air inlet direction is different from the direction of the line connecting the first port 111 and the second port 112. The card section 142 here can form the air duct 16 with the outer shell 13, and the outward section 143 can change the air inlet direction of the air duct 16. Since the outward section 143 extends away from the center position, the air inlet position of the air duct 16 is different from the direction of the line connecting the first port 111 and the second port 112, and the direction of the line connecting the first port 111 and the second port 112 is the air outlet direction of the air cavity 11. If the air inlet of the air duct 16 is the same as the air outlet direction, it will interfere with the air inlet of the air duct 16, and will affect the air inlet efficiency of the air duct 16 to some extent. The outward section 143 provided here changes the position of the air inlet end of the air duct 16, so as to improve the air inlet efficiency of the air duct 16.

[0049] There are several cases for closing the air duct 16 here. One is that the end of the card section 142 is attached to the outer shell 13, and the air duct 16 is closed; another case is that the outward section 143 is attached to the outer shell 13, and the air duct 16 is closed; of course, the end of the card section 142 or the outward section 143 can be attached to the outer shell 13 to close the air duct 16. Among them, the third case can be considered as one of the first case and the second case.

[0050] Of course, in other embodiments, the air inlet direction of the air duct 16 can be the same as the direction of the line connecting the first port 111 and the second port 112, and at this time the air inlet or air outlet direction of the air cavity 11 is the same as the air inlet direction of the air duct 16.

[0051] Specifically, as shown in Figure 2 and Figure 7 When the air exhaust function is started, the outward section 143 is attached to the outer shell 13, so as to close the air inlet of the air duct 16, that is, to close the air duct 16, which can avoid the accumulation of dust in the air duct 16 in the no-wind state. When the air circulation function is started, the outward section 143 can be extended to open the air duct 16.

[0052] In other embodiments, the air duct switch housing 14 can also include a fixed card-in section 142 and a movable extended section 143, wherein the card-in section 142 is fixedly connected to the outer housing 13 with a gap therebetween to form the air duct 16, and the extended section 143 is directly driven by the actuating lever 41 to open or close the air inlet of the air duct 16, thereby controlling whether the air duct 16 is in an air inlet state.

[0053] In other embodiments, the card-in section 142 and the extended section 143 are both fixedly arranged, and a through hole is formed at the end position of the card-in section 142, and a cover plate is arranged on the through hole, and the cover plate is moved to the second port 112 side to open the through hole. At this time, the actuating lever 41 is not rotatably connected to the receiving site 151, but is directly matched with the vane 20 and the cover plate, and one end of the actuating lever 41 is fixedly connected to the cover plate. Therefore, the moving manner of the vane 20 is the same as the moving direction of the actuating lever 41, and the moving direction of the cover plate is also the same. At this time, the cover plate is moved to the first port 111 to close the air duct 16, and is moved to the second port 112 to open the air duct 16.

[0054] The air duct 16 adjustable exhaust fan also includes a protective net 50 and a negative ion generator 60, wherein the protective net 50 is arranged at the first port 111, and the electrode 61 of the negative ion generator 60 is arranged on the protective net 50. The protective net 50 ensures the safety of the user and also protects the vane 20 from being damaged. The negative ion generator 60 can purify the air, so the negative ion generator 60 is started only when the air circulation function is started, and the ionization occurs at the electrode 61.

[0055] The air duct 16 adjustable method uses the above-mentioned air duct 16 adjustable exhaust fan, and includes the following steps:

[0056] Starting the exhaust program, the fan is rotated along the first rotating direction, the vane 20 is driven to rotate along the first rotating direction, the air flows along the first port 111 to the second port 112, and the one-way conduction assembly 12 is opened;

[0057] Starting the circulation program, the fan is rotated along the second rotating direction, the vane 20 is driven to rotate along the second rotating direction, the switch assembly 40 controls the air duct 16 to be conducted, the one-way conduction assembly 12 is closed, the air enters the air duct 16 from the room, then enters the cavity, and finally is discharged to the room through the first port 111.

[0058] The above embodiments are not exhaustive enumeration based on the present application, and there can be other unlisted embodiments in addition thereto. Any replacement and improvement made without violating the concept of the present application is within the protection scope of the present application.

Claims

1. An adjustable exhaust fan for an air duct, characterized by It comprises a shell assembly, a blade, a motor and a switch assembly, the blade is installed on the motor; The shell assembly is provided with a wind cavity in the middle, the wind cavity comprises a first port and a second port, the motor is installed in the wind cavity, the second port is further provided with a one-way conducting assembly; The shell assembly is provided with a wind channel on the side, one end of the wind channel is communicated with the outside, the other end is communicated with the wind cavity, the switch assembly controls the on-off of the wind channel; When the motor rotates in the first direction, the one-way conducting assembly is opened, air flows from the first port to the second port; when the motor rotates in the second direction, the one-way conducting assembly is closed, the switch assembly controls the conduction of the wind channel, air flows from the second port to the first port; The blade is circumferentially limited and axially slidably installed on the output shaft of the motor, the sliding direction of the blade is along the direction of the line connecting the first port and the second port of the wind cavity; When the motor rotates in the first direction, the blade sliding triggers the switch assembly to close the wind channel; when the motor rotates in the second direction, the blade reversely slides to trigger the switch assembly to open the wind channel; The shell assembly comprises an outer shell and a wind channel switch shell, the wind channel switch shell is slidably installed on the shell assembly, and the switch assembly controls the sliding of the wind channel switch shell; The outer shell is provided with a support seat in the wind cavity, the motor is installed in the middle of the support seat, and the outer side of the support seat or the outer side of the motor is provided with a receiving site; The switch assembly comprises a toggle lever, the middle of the toggle lever is rotatably connected to the receiving site, one end of the toggle lever is matched with the blade, and the other end is matched with the wind channel switch shell; An annular groove is formed on the blade, and one end of the toggle lever is inserted into the annular groove to match with the blade; The outer shell and the wind channel switch shell are matched with a sliding column.

2. The adjustable exhaust fan of claim 1, wherein, The output shaft of the motor forms a guide column, the end of the guide column is further provided with a limiting protrusion, and the blade is slidably installed on the guide column; when the motor rotates in the first direction, the blade slides to the first port along the guide column under the action of the reaction force and is limited by the limiting protrusion; when the motor rotates in the second direction, the blade slides to the second port along the guide column under the action of the reaction force.

3. The adjustable exhaust fan of claim 1, wherein, The wind channel switch shell is provided with a driving groove, and one end of the toggle lever is inserted into the driving groove to match with the wind channel switch shell.

4. The adjustable register according to claim 1, wherein the air flow is adjusted by the air flow adjustment mechanism. The wind channel switch shell comprises a clamping section and an outward extending section; The clamping section extends into the outer shell, and the gap between the clamping section and the outer shell forms the wind channel; the outward extending section extends outward away from the center position, and when the end of the clamping section or the outward extending section is attached to the outer shell, the wind channel is closed, and when the end of the clamping section or the outward extending section is spaced from the outer shell, the wind channel is opened.

5. The adjustable outlet fan of any one of claims 1 to 4, wherein, It further comprises a protective net and a negative ion generator, the protective net is installed at the first port, and the electrode of the negative ion generator is installed on the protective net.

6. Adjustable method of an air duct, characterized in that, The use of the adjustable exhaust fan of claim 1 comprises the following steps: Start the exhaust program, the fan rotates along the first direction, the blade rotates along the first direction, the air flows along the first port to the second port, and the one-way valve assembly is opened; Start the circulation program, the fan rotates along the second direction, the blade rotates along the second direction, the switch assembly controls the air duct to be open, the one-way valve assembly is closed, the air enters the air duct from the room, then enters the cavity, and finally is discharged from the room through the first port.

Images