CN218915132U - Fresh air outlet control device and fresh air fan - Google Patents

Abstract

The utility model provides a fresh air outlet control device and a fresh air fan, relates to the technical field of air conditioners, and is designed for solving the problem that the fresh air outlet is inconvenient to control by the fresh air fan. The fresh air outlet control device comprises a split-flow cavity, a drain outlet and a plurality of air outlets are formed in the split-flow cavity, the drain outlet is connected with a waste air return pipe, the air outlets are connected with air outlet pipes, each air outlet or each air outlet pipe is provided with a shutter type switch, and each drain outlet or each waste air return pipe is provided with a shutter type switch. The fresh air outlet control device provided by the utility model can conveniently control whether the fresh air blower is used for outputting air in different directions or not, and control the air output in different directions.

Description

Fresh air outlet control device and fresh air fan

Technical Field

The utility model relates to the technical field of air conditioners, in particular to a fresh air outlet control device and a fresh air machine.

Background

In the prior art, an air conditioner with a fresh air function is used for supplementing outdoor air into a room through a fresh air blower in the process of sending fresh air into the room so as to gradually expel the indoor air. However, in this case, the window is closed, so that the indoor air can be gradually discharged from the door slit, window slit, etc., and the discharging speed is low, so that the fresh air supply rate in the room is low, and the fresh air effect is poor.

In addition, the current air conditioner adjusts the amount of wind of new trend, also is through the way of adjusting the new trend fan rotational speed more, however adjusts the rotational speed of new trend fan, if the amount of wind that needs is lower, then needs new trend fan work on lower rotational speed interval, is unfavorable for new trend fan work at the higher work interval of efficiency, reduces the work efficiency of new trend fan.

Disclosure of Invention

The first object of the present utility model is to provide a fresh air outlet control device, so as to solve the technical problem that the existing fresh air fan is inconvenient to control the fresh air outlet.

The fresh air outlet control device comprises a split cavity, wherein the split cavity is provided with a sewage outlet and a plurality of air outlets, the sewage outlet is connected with a sewage air return pipe, the air outlets are connected with air outlet pipes, each air outlet or each air outlet pipe is provided with a shutter type switch, and each sewage outlet or each sewage air return pipe is provided with a shutter type switch.

The fresh air outlet control device has the beneficial effects that:

by arranging the shutter type switch at each air outlet or air outlet pipe and each sewage outlet or sewage air return pipe, the switch and the opening size of each air outlet or sewage air return pipe can be independently controlled, so that whether the air outlet of each air outlet pipe is air-out or not can be independently controlled. In general, a plurality of air outlet pipes are arranged on the fresh air machine, which means that air is discharged in a plurality of directions, so that whether the fresh air machine discharges air in different directions or not and the air quantity of the air discharged in different directions can be conveniently controlled.

In the preferred technical scheme, the shutter type switch comprises a switch driving piece and a plurality of rotary switch plates, and the rotary switch plates are in transmission connection with the switch driving piece.

The switch driving piece drives the rotary switch plates, corresponding edges of two adjacent rotary driving plates of the rotary switch plates are mutually attached to realize the closing of the air outlet or the air outlet pipe, the sewage outlet or the sewage return pipe, and the rotary switch plates are at the maximum opening position when being parallel to the air flow direction of the air outlet pipe or the sewage return pipe so as to reduce the obstruction to the air flow as much as possible. In addition, the projection length of the shutter type switch in the air flow direction can be reduced due to the combined action of the plurality of rotary switch plates, so that the layout of the shutter type switch is facilitated, and the influence on the layout of the fresh air fan is reduced.

In the preferred technical scheme, the rotary switch plates are pivoted with the sewage wind return pipe or the air outlet pipe, the rotary switch plates are pivoted with the connecting rods, and any two rotary switch plates pivoted with the connecting rods, the connecting rods and the sewage wind return pipe or the air outlet pipe form a parallelogram mechanism.

The rotary switch plate is arranged in the air outlet pipe and the dirty air return pipe, so that the integrity of the space in the split cavity can be ensured, and the turbulence generated when the gas moves in the split cavity is reduced. The parallelogram mechanism formed by the connecting rod and the rotary switch plates can realize the motion synchronism and the angle consistency of the rotary switch plates, so that the air outlet pipe and the sewage air return pipe can be closed as tightly as possible when the air outlet pipe and the sewage air return pipe are required to be closed, and the rotary switch plates are positioned at the same position as the air flow direction when the maximum area is required to be opened, thereby reducing the resistance of fresh air flow as much as possible.

In a preferred embodiment, at least one of the plurality of rotary switch plates has a torque transmission hole; the power output shaft of the switch driving piece is inserted into the torque transmission hole and is fixedly connected with the torque transmission hole in the circumferential direction.

The power output shaft of the switch driving piece is inserted into the torque transmission hole and fixedly connected with the circumference of the torque transmission hole, so that the rotation of the power output shaft of the switch driving piece can be directly converted into the rotation of the rotary switch plate, the transmission efficiency is high, the structure of the shutter type switch is simplified, and the height of the shutter type switch is reduced.

In the preferred technical scheme, the outer surfaces of the sewage air return pipe and the air outlet pipe are respectively provided with a mounting column, the switch driving piece is provided with a mounting lug plate, and the mounting lug plates are fixed on the mounting columns through male thread connecting pieces; all the rotary switch plates are provided with the torque transmission holes.

The mounting posts are arranged to mount the switch driving pieces, so that the height of the power output shaft of each switch driving piece can be raised, and the power output shaft can be connected with one end of the rotary switch plate after penetrating through the pipe walls of the air outlet pipe and the sewage air return pipe. And then make all rotatory switch boards in same tripe formula switch, whether be connected with the switch driving piece is direct, all can adopt the same shape, structure, size to the assembly complexity of product has been reduced.

In the preferred technical scheme, the switch driving piece is a motor, and a connecting line of the mounting column on the sewage wind return pipe or the air outlet pipe is arranged at right angles to the arrangement direction of the rotary switch plate pivoted on the same sewage wind return pipe or the air outlet pipe.

In general, a motor as a switch driver has a wiring portion that is offset from a mounting lug as viewed in the axial direction of the motor, which would otherwise cause interference between the wiring portion and a tool for rotating a screw. The arrangement direction of the rotary switch plate is perpendicular to the air flow direction of the air outlet pipe and the sewage air return pipe, namely, the rotary switch plate is arranged along the circumferential direction of the split-flow cavity. So with the perpendicular setting of direction of arranging of erection column line and reposition of redundant personnel cavity for the line of motor can be roughly along the circumference outside the reposition of redundant personnel cavity and arrange, thereby makes the line have great arrangement space, is difficult for receiving the less interference in space between fresh air fan's shell and the reposition of redundant personnel cavity, in other words, can suitably reduce fresh air fan's shell size, thereby save material, reduction cost.

In the preferred technical scheme, the inner wall of dirty wind return air pipe with the inner wall of play tuber pipe all is equipped with spacing sub-mouth, spacing sub-mouth is used for with wherein the edge butt of rotary switch board.

Through setting up the limit sub-mouth, can realize the degree of laminating between the edge of rotary switch board and the inner wall of dirty wind return air pipe and the inner wall of play tuber pipe, improve the leakproofness, also can prevent that rotary switch board rotation angle is too big and the time of extravagant switch moreover.

In the preferred technical scheme, the switch driving piece is arranged on the upper surface of the sewage air return pipe or the air outlet pipe.

The switch driving piece is arranged on the upper surface of the dirty air return pipe or the air outlet pipe, so that the male thread connecting piece can be conveniently screwed or unscrewed through a tool, the switch driving piece such as a motor can be conveniently wired, and the convenience degree and the operation efficiency of loading and unloading operation are improved.

In the preferred technical scheme, the quantity of play tuber pipe is three, the quantity of dirty wind return air pipe is one, dirty wind return air pipe is 90 contained angles with adjacent go out the tuber pipe and arrange, three go out the tuber pipe interval 90 setting.

The air outlet pipe and the dirty air return pipe are arranged in such a way, fresh air can be discharged from the front direction, the left direction and the right direction of the fresh air fan, and the fresh air switch and the size in the three directions are respectively controlled by the shutter type switch, so that the user experience is improved.

The second purpose of the utility model is to provide a fresh air machine so as to solve the technical problem that the fresh air output is inconvenient to control by the fresh air machine.

The fresh air fan provided by the utility model comprises the fresh air outlet control device.

By arranging the fresh air outlet control device in the fresh air machine, the fresh air machine has all the advantages of the fresh air outlet control device correspondingly, and the fresh air outlet control device is not described in detail herein.

Drawings

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

Fig. 1 is a schematic structural diagram of a fresh air outlet control device provided in an embodiment of the present utility model in a closed state of a shutter switch;

fig. 2 is a schematic structural diagram of a fresh air outlet control device provided in an embodiment of the present utility model in an open state of a shutter switch;

fig. 3 is a schematic structural diagram of a shutter switch in a fresh air outlet control device provided in an embodiment of the present utility model in a closed state;

fig. 4 is a schematic structural diagram of a shutter switch in a fresh air outlet control device provided in an embodiment of the present utility model in an open state;

FIG. 5 is a top cross-sectional view of a fresh air outlet control device according to an embodiment of the present utility model in a closed state of a shutter switch;

FIG. 6 is a top cross-sectional view of a fresh air outlet control device according to an embodiment of the present utility model in an open state of a shutter switch;

fig. 7 is a schematic structural diagram of a fresh air outlet control device provided in a second embodiment of the present utility model in an open state of a shutter switch.

Reference numerals illustrate:

100-split cavity; 110-an air outlet; 120-a sewage outlet; 200-shutter type switch; 210-a switch driver; 211-a power output shaft; 212-wiring part; 213-mounting an ear plate; 220-rotating a switch plate; 221-plate body; 222-upper pivot shaft portion; 223-lower pivot shaft portion; 224-swinging rod; 225-a torque transfer bore; 230-connecting rod; 300-an air outlet pipe; 301-mounting posts; 302-limiting sub-openings; 400-a dirty air return pipe;

501-a fresh air fan; 502-a new air pipe; 503-a filter cavity; 504-a dirty air inlet valve.

Detailed Description

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

Embodiment one:

fig. 1 is a schematic structural diagram of a fresh air outlet control device provided in an embodiment of the present utility model in a closed state of a shutter switch; fig. 2 is a schematic structural diagram of a fresh air outlet control device provided in an embodiment of the present utility model in an open state of a shutter switch; as shown in fig. 1-2, the fresh air outlet control device provided in the first embodiment of the present utility model includes a split cavity 100, where the split cavity 100 is provided with a drain outlet 120 and a plurality of air outlets 110, the drain outlet 120 is connected with a waste air return pipe 400, the air outlets 110 are connected with an air outlet pipe 300, each air outlet 110 or air outlet pipe 300 is provided with a shutter switch 200, and each drain outlet 120 or waste air return pipe 400 is provided with a shutter switch 200.

Specifically, in this embodiment, the split-flow cavity 100 is in a shape of a inverted bucket, and has a side wall and a bottom wall, and the split-flow cavity 100 may be a hollow cylinder or a hollow cone with an opening at the lower portion. The air outlet pipe 300 may be connected to the air outlet 110, specifically, an inner end of the air outlet pipe 300, that is, an end facing the inner side of the split cavity 100 is abutted to the outer side of the edge of the air outlet 110, or the inner end of the air outlet 110 is inserted into the air outlet 110 and is flush with the inner wall of the split cavity 100 where the air outlet 110 is located, or the air outlet pipe 300 and the split cavity 100 are integrally formed. Similarly, the inner end of the sewage return duct 400 is abutted to the outer side of the edge of the sewage outlet 120, or inserted into the sewage outlet 120 and flush with the inner wall of the diversion cavity 100 where the sewage outlet 120 is located, or integrally formed with the diversion cavity 100.

By providing the shutter switch 200 at each air outlet 110 or 300 and each sewage outlet 120 or 400, the opening and the opening of each air outlet 300 or 400 can be independently controlled, so as to independently control whether the air outlet of each air outlet 300 is air-out. In general, a plurality of air outlet pipes 300 are provided on the fresh air machine, which means that air is discharged in a plurality of directions, so that whether the fresh air machine is discharged in different directions or not and the air quantity of the discharged air in different directions can be controlled.

In the first embodiment of the present application, the shutter switch 200 is disposed on the air outlet pipe 300 or the dirty air return pipe 400. In another implementation manner, the air outlet pipe 300 and the dirty air return pipe 400 also penetrate through the side wall of the diversion cavity 100 from outside to inside and penetrate deep into the inner side of the inner wall of the diversion cavity 100, the inner end pipe openings of the air outlet pipe 300 and the dirty air return pipe 400 are the air outlet 110 and the sewage outlet 120, and the shutter switch 200 can be installed on the top wall of the diversion cavity 100 to control the opening or opening area of the inner end pipe openings of the air outlet pipe 300 and the dirty air return pipe 400. That is, the air outlet 110 is provided with a shutter switch 200, and the sewage outlet 120 is provided with the shutter switch 200.

Fig. 3 is a schematic structural diagram of a shutter switch in a fresh air outlet control device provided in an embodiment of the present utility model in a closed state; fig. 4 is a schematic structural diagram of a shutter switch in a fresh air outlet control device provided in an embodiment of the present utility model in an open state; as shown in fig. 3 and 4, the shutter switch 200 preferably includes a switch driving member 210 and a plurality of rotary switch plates 220, and the plurality of rotary switch plates 220 are in driving connection with the switch driving member 210.

Specifically, the switch driving member 210 may be a motor.

The switch driving member 210 drives the plurality of rotary switch plates 220, corresponding edges of two adjacent rotary driving plates of the plurality of rotary switch plates 220 are mutually attached to realize the closing of the air outlet 110 or the air outlet pipe 300, the sewage outlet 120 or the sewage return pipe 400, and when the plurality of rotary switch plates 220 are parallel to the air flow direction of the air outlet pipe 300 or the sewage return pipe 400, the maximum position is opened, so that the obstruction to the air flow is reduced as much as possible. In addition, the projection length of the shutter switch 200 in the air flow direction can be reduced by providing a plurality of rotary switch plates 220 for coaction, so that the layout of the shutter switch 200 is facilitated, and the influence on the layout of the fresh air fan is reduced.

FIG. 5 is a top cross-sectional view of a fresh air outlet control device according to an embodiment of the present utility model in a closed state of a shutter switch; FIG. 6 is a top cross-sectional view of a fresh air outlet control device according to an embodiment of the present utility model in an open state of a shutter switch; as shown in fig. 1, 2, 5 and 6, preferably, the plurality of rotary switch plates 220 are pivoted to the waste-air return duct 400 or the air outlet duct 300, and the plurality of rotary switch plates 220 are pivoted to the connecting rod 230, and any two rotary switch plates 220 pivoted to the connecting rod 230, the connecting rod 230 and the waste-air return duct 400 or the air outlet duct 300 form a parallelogram mechanism.

As shown in fig. 3 and fig. 4, taking the example of air outlet along the horizontal direction in the present embodiment as an example, each rotary switch board 220 includes an upper pivot shaft portion 222 and a lower pivot shaft portion 223, the upper pivot shaft portion 222 and the lower pivot shaft portion 223 are coaxially disposed and are fixedly connected with the board 221, the upper pivot shaft portion 222 is fixedly connected to the top of the board 221, and the lower pivot shaft portion 223 is fixedly connected to the bottom of the board 221. It should be noted that, the lower pivot portion 223 is fixedly connected to the bottom of the plate 221, which does not mean that the lower pivot portion 223 is not detachable from the plate 221. In this embodiment, the lower pivot shaft portion 223 may be separated from the plate 221, and in the process of installing the rotary switch plate 220 on the air outlet pipe 300 and the dirty air return pipe 400, the upper pivot shaft portion 222 and the plate 221 may be placed into the air outlet pipe 300 and the dirty air return pipe 400, so that the upper pivot shaft portion 222 is matched with the holes on the top walls of the air outlet pipe 300 and the dirty air return pipe 400, and then the lower pivot shaft portion 223 penetrates from the holes on the bottom walls of the air outlet pipe 300 and the dirty air return pipe 400 and is connected with the plate 221.

As shown in fig. 3 and 4, a swing rod 224 is fixedly connected to the lower portion of the lower pivot shaft 223, and in each of the shutter switches 200, the plate 221 of each rotary switch plate 220 has the same relative angle and position with the swing rod 224. And the free end of each swing link 224 is pivotally connected to a link 230. Specifically, the connecting rod 230 and the swing rod 224 may be located below the bottom walls of the air outlet pipe 300 and the dirty air return pipe 400, so that the air flow may be disturbed when flowing in the air outlet pipe 300 and the dirty air return pipe 400, thereby improving the air outlet efficiency.

The rotary switch plate 220 is arranged in the air outlet pipe 300 and the dirty air return pipe 400, so that the integrity of the space in the split-flow cavity 100 can be ensured, and the turbulence generated when the gas moves in the split-flow cavity 100 can be reduced. The parallelogram mechanism formed by the connecting rod 230 and the rotary switch plates 220 can realize the motion synchronism and the angle consistency of the rotary switch plates 220, so that the air outlet pipe 300 and the dirty air return pipe 400 can be closed as tightly as possible when the air outlet pipe is required to be closed, and the rotary switch plates 220 are positioned at the same position as the air flow direction when the maximum area is required to be opened, thereby reducing the resistance of fresh air flow as much as possible.

As shown in fig. 1-6, preferably, at least one rotary switch plate 220 of the plurality of rotary switch plates 220 has a torque transmission hole 225; the power output shaft 211 of the switch driver 210 is inserted into the torque transmission hole 225 and fixedly coupled to the torque transmission hole 225 in the circumferential direction.

As shown in fig. 1, 2, 5 and 6, specifically, the torque transmission hole 225 is disposed on the upper pivot shaft 222, and each point on the inner wall of the torque transmission hole 225 is not uniformly spaced from the axis of the upper pivot shaft 222, that is, the torque transmission hole 225 is a non-circular hole, and further, the cross section of the torque transmission hole 225 may be rectangular or square, or the torque transmission hole 225 has a shape in which the rest of a pair of planes parallel to each other are arc surfaces. And the power output shaft 211 of the switch driver 210 is sized to fit the shape of the torque transfer aperture 225.

The power output shaft 211 of the switch driving member 210 is inserted into the torque transmission hole 225 and fixedly connected with the circumference thereof, so that the rotation of the power output shaft 211 of the switch driving member 210 can be directly converted into the rotation of the rotary switch plate 220, the transmission efficiency is high, and the structure of the shutter switch 200 is simplified, and the overall height of the shutter switch is reduced.

Of course, in another implementation, the transmission between the switch driving member 210 and the rotary switch plates 220 may be implemented by a combination of a rack and a pinion, for example, a gear may be fixed to the power output shaft 211 of the switch driving member 210, and a gear may be fixed to the upper pivot shaft portion 222 of each rotary switch plate 220, and these gears are engaged with the same rack. When the rack is driven by the gear of the power output shaft 211, the rotary switch board 220 can also rotate, so as to close or open the air outlet pipe 300 and the dirty air return pipe 400.

As shown in fig. 1 and 2, preferably, the outer surfaces of the dirty air return duct 400 and the air outlet duct 300 are provided with mounting posts 301, the switch driving member 210 is provided with mounting lugs 213, and the mounting lugs 213 are fixed on the mounting posts 301 through male screw connectors (not shown in the drawings); all of the rotary switch plates 220 are provided with torque transmission holes 225.

Each switch driving member 210 may have a pair of mounting lugs 213, a line connecting the pair of mounting lugs 213 passes through an axis of the switch driving member 210, and the male screw connection member may be a stud, a bolt, a screw, or the like, preferably a screw in the air conditioning field.

By providing the mounting posts 301 to mount the switch driving members 210, the height of the power output shaft 211 of each switch driving member 210 can be raised, and it is possible to connect the power output shaft 211 after one end of the rotary switch plate 220 passes through the walls of the air outlet pipe 300 and the dirty air return pipe 400. And thus all the rotary switch plates 220 in the same shutter switch 200, whether or not directly connected with the switch driving member 210, can adopt the same shape, structure and size, thereby reducing the assembly complexity of the product.

As shown in fig. 1 and 2, preferably, the switch driving member 210 is a motor, and a connection line of the mounting post 301 on one of the dirty air return duct 400 and the outlet duct 300 is arranged at right angles to the arrangement direction of the rotary switch plate 220 pivoted to the same dirty air return duct 400 or outlet duct 300.

In general, the motor as the switch driver 210 has a wiring portion 212, and the wiring portion 212 is offset from the mounting lug 213 as viewed in the axial direction of the motor, which would otherwise cause interference between the wiring portion 212 and a tool for rotating the screw. The arrangement direction of the rotary switch plate 220 is perpendicular to the air flow direction of the air outlet pipe 300 and the sewage air return pipe 400, i.e. the rotary switch plate is arranged along the circumferential direction of the split-flow cavity 100. So the connection line of the mounting column 301 is perpendicular to the arrangement direction of the split cavity 100, so that the connection line of the motor can be arranged along the circumferential direction of the outer side of the split cavity 100, so that the connection line has a larger arrangement space and is not easy to be interfered by smaller space between the casing of the fresh air blower and the split cavity 100, in other words, the casing size of the fresh air blower can be properly reduced, thereby saving materials and reducing manufacturing cost.

As shown in fig. 5 and 6, preferably, the inner wall of the dirty air return duct 400 and the inner wall of the air outlet duct 300 are both provided with a limit sub-opening 302, and the limit sub-opening 302 is used for abutting against the edge of one of the rotary switch plates 220.

By arranging the limit sub-opening 302, the degree of fitting between the edge of the rotary switch plate 220 and the inner wall of the dirty air return pipe 400 and the inner wall of the air outlet pipe 300 can be realized, the tightness is improved, and the time of switching can be prevented from being wasted due to overlarge rotation angle of the rotary switch plate 220.

As shown in fig. 1 and 2, the switch driving part 210 is preferably installed at the upper surface of the dirty air return duct 400 or the outlet duct 300.

The switch driving member 210 is mounted on the upper surface of the dirty air return duct 400 or the air outlet duct 300, so that the male screw connection member can be conveniently screwed or unscrewed by a tool, and the switch driving member 210 such as a motor can be conveniently wired, thereby improving the convenience of loading and unloading operations and the operation efficiency.

As shown in fig. 1, 2, 5 and 6, the number of the air outlet pipes 300 is preferably three, the number of the dirty air return pipes 400 is one, the dirty air return pipes 400 and the adjacent air outlet pipes 300 are arranged at an included angle of 90 degrees, and the three air outlet pipes 300 are arranged at an interval of 90 degrees.

With this arrangement of the air outlet pipe 300 and the dirty air return pipe 400, fresh air can be discharged from the front, left and right directions of the fresh air fan, and the fresh air switch in the three directions are respectively controlled by the shutter type switch 200, so that the user experience is improved.

Embodiment two:

fig. 7 is a schematic structural diagram of a fresh air outlet control device provided in a second embodiment of the present utility model in an open state of a shutter switch. As shown in fig. 7, the second embodiment further provides a fresh air fan, which includes the fresh air outlet control device.

By arranging the fresh air outlet control device in the fresh air machine, the fresh air machine has all the advantages of the fresh air outlet control device correspondingly, and the fresh air outlet control device is not described in detail herein.

Specifically, in addition to the fresh air outlet control device, the fresh air fan further includes a fresh air fan 501, a fresh air pipe 502, a dirty air return pipe 400, and a filter cavity 503, where an outlet of the fan is communicated with the split cavity 100, an inlet of the fresh air fan 501 is communicated with an outlet side of the filter cavity 503, an inlet side of the filter cavity 503 is connected with the fresh air pipe 502, a dirty air inlet valve 504 is disposed on one side of the cavity, and a filter screen (not shown in the figure) such as a HEPA screen may be disposed in the filter cavity 503.

When the fresh air fan executes the fresh air function, each shutter switch 200 for controlling the air outlet pipe 300 is in a conducting state, the shutter switch 200 for controlling the dirty air return pipe 400 is closed, fresh air entering from the fresh air pipe 502 is filtered by the filter screen and enters into the split cavity 100 under the drive of the fresh air fan 501, enters into the three air outlet pipes 300 from the split cavity 100, and is supplied to the room. The shutter switch 200 for controlling the return air duct 400 is closed. When the fresh air fan performs the function of blow-down air, the shutter switch 200 for controlling the three air outlet pipes 300 is in a closed state, the shutter switch 200 for controlling the dirty air return pipe 400 is opened, the dirty air inlet valve 504 is opened, and the fresh air pipe 502 and the filter cavity 503 are disconnected by a valve not shown in the figure. The indoor dirty air enters the filter cavity 503 through the dirty air inlet valve 504, is driven by the fresh air fan 501 to be sent into the diversion cavity 100, enters the dirty air return pipe 400 through the sewage outlet 120, and is finally discharged outdoors through the fresh air pipe 502.

Although the present utility model is disclosed above, the present utility model is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the utility model, and the scope of the utility model should be assessed accordingly to that of the appended claims.

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

In the above embodiments, descriptions of orientations such as "up", "down", and the like are shown based on the drawings.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model.

Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. Fresh air outlet control device, its characterized in that includes reposition of redundant personnel cavity (100), it has drain (120) and a plurality of air outlet (110) to divide the cavity (100) to open, drain (120) are connected with dirty wind return air pipe (400), air outlet (110) are connected with air-out pipe (300), every air outlet (110) or air-out pipe (300) are equipped with tripe formula switch (200), every drain (120) or dirty wind return air pipe (400) set up tripe formula switch (200).

2. The fresh air outlet control device according to claim 1, wherein the shutter switch (200) comprises a switch driving member (210) and a plurality of rotary switch plates (220), and a plurality of the rotary switch plates (220) are in transmission connection with the switch driving member (210).

3. The fresh air outlet control device according to claim 2, wherein a plurality of the rotary switch plates (220) are pivoted to the dirty air return duct (400) or the outlet duct (300), and a plurality of the rotary switch plates (220) are pivoted to the connecting rod (230), and any two of the rotary switch plates (220), the connecting rod (230), and the dirty air return duct (400) or the outlet duct (300) pivoted to the connecting rod (230) form a parallelogram mechanism.

4. A fresh air outlet control device according to claim 3, wherein at least one of the rotary switch plates (220) has a torque transmission hole (225); the power output shaft (211) of the switch driving piece (210) is inserted into the torque transmission hole (225) and is fixedly connected with the circumference of the torque transmission hole (225).

5. The fresh air outlet control device according to claim 4, wherein the outer surfaces of the dirty air return duct (400) and the outlet duct (300) are provided with mounting posts (301), the switch driving member (210) is provided with mounting lugs (213), and the mounting lugs (213) are fixed on the mounting posts (301) through male screw connectors; all of the rotary switch plates (220) are provided with the torque transmission holes (225).

6. The fresh air outlet control device according to claim 5, wherein the switch driving member (210) is a motor, and the connection line of the mounting column (301) on the one dirty air return pipe (400) or the outlet pipe (300) is arranged at right angles to the arrangement direction of the rotary switch plate (220) pivoted to the same dirty air return pipe (400) or the outlet pipe (300).

7. A fresh air outlet control device according to claim 3, wherein the inner wall of the dirty air return duct (400) and the inner wall of the air outlet duct (300) are both provided with a limit sub-opening (302), and the limit sub-opening (302) is used for abutting against the edge of one of the rotary switch plates (220).

8. A fresh air outlet control device according to claim 3, wherein the switch driving member (210) is mounted on the upper surface of the dirty air return duct (400) or the outlet duct (300).

9. The fresh air outlet control device according to any one of claims 1 to 8, wherein the number of the air outlet pipes (300) is three, the number of the dirty air return pipes (400) is one, the dirty air return pipes (400) are arranged at an included angle of 90 degrees with the adjacent air outlet pipes (300), and the three air outlet pipes (300) are arranged at an interval of 90 degrees.

10. A fresh air fan, characterized in that the fresh air fan comprises a fresh air outlet control device according to any one of claims 1 to 9.

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