CN217154515U

CN217154515U - Air duct switching device and fresh air system

Info

Publication number: CN217154515U
Application number: CN202220918306.5U
Authority: CN
Inventors: 黄信博
Original assignee: Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Current assignee: Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Priority date: 2022-04-20
Filing date: 2022-04-20
Publication date: 2022-08-09
Anticipated expiration: 2032-04-20

Abstract

The embodiment of the application discloses air duct switching device and fresh air system, relates to the technical field of ventilation systems, and the air duct switching device can realize free switching of air ducts, is simple in structure and can reduce the failure rate of air duct switching. This wind channel auto-change over device includes: a housing having a hollow interior and an air duct switching mechanism. Wherein, be provided with a plurality of tuyeres with the inner chamber intercommunication on the casing, a plurality of tuyeres include: the first air port, the second air port, the third air port and the fourth air port; the air duct switching mechanism is rotationally connected with the shell; the air duct switching mechanism includes: a first working position and a second working position; if the air duct switching device rotates to the first working position, the air duct switching mechanism is communicated with the first air opening and the third air opening and is communicated with the second air opening and the fourth air opening; if the air duct switching mechanism rotates to the second working position, the air duct switching mechanism is communicated with the first air opening and the fourth air opening and is communicated with the second air opening and the third air opening.

Description

Air duct switching device and fresh air system

Technical Field

The utility model relates to a ventilation system technical field especially relates to a wind channel auto-change over device and new trend system.

Background

With the rapid development of economic society in China, the living standard of people is gradually improved, and the requirements on the comfort level and the quality of indoor environments such as office environments, living environments and the like are higher and higher. Indoor humidity is also used as a criterion for determining indoor environmental comfort, and air quality and comfort are increasingly emphasized by every family and various commercial and office places.

Generally, people often adopt a fresh air device to improve indoor environment and air quality. In a new trend device, outdoor air humidity is big summer, the moisture that outdoor new trend carried needs earlier through the absorption of adsorption material, again pass through indoor moisture of airing exhaust in with the adsorption material and take away, thereby make the moisture that carries in the outdoor new trend can't get into indoorly, the in-process needs the heat exchanger constantly to become the condenser from the evaporimeter, become the evaporimeter by the condenser again, and new trend passageway and the passageway of airing exhaust also need constantly switch over each other, consequently need an air channel auto-change over device to realize above-mentioned new trend wind channel and the free switching over in the wind channel of airing exhaust.

However, in the related art, too many air valves are often used in combination, and the air duct switching is realized by cooperatively opening or closing the related air valves. For example, the air duct switching is realized by the combined opening and closing of 8 air valves. However, such excessive dampers make the device complicated and space-consuming. In addition, too many air valves can complicate the air duct switching process, and the probability of failure is higher.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a wind channel auto-change over device and new trend system can realize freely switching over of wind channel, and simple structure, reduces the fault rate that the wind channel switches over.

In a first aspect, the present application provides an air duct switching device, including: a housing having a hollow interior and an air duct switching mechanism. Wherein, be provided with a plurality of tuyeres with the inner chamber intercommunication on the casing, a plurality of tuyeres include: the first air port, the second air port, the third air port and the fourth air port; the air duct switching mechanism is rotationally connected with the shell; the air duct switching mechanism includes: a first working position and a second working position; if the air duct switching device rotates to the first working position, the air duct switching mechanism is communicated with the first air opening and the third air opening and is communicated with the second air opening and the fourth air opening; if the air duct switching mechanism rotates to the second working position, the air duct switching mechanism is communicated with the first air opening and the fourth air opening and is communicated with the second air opening and the third air opening.

The air duct switching device provided by the embodiment of the application comprises: casing and wind channel switching mechanism. The shell is provided with a hollow outer cavity, and the shell is provided with a plurality of first air ports, second air ports, third air ports and fourth air ports which are communicated with the inner cavity. Therefore, the first air port, the second air port, the third air port and the fourth air port can be communicated with each other through the inner cavity. In addition, air duct switching mechanism sets up in the inner chamber, and rotates with the casing and be connected, and this air duct switching mechanism includes: the air duct switching mechanism is communicated with the first air opening and the third air opening and communicated with the second air opening and the fourth air opening when rotating to the second working position.

Therefore, when the first air port is an outdoor air inlet, the second air port is an indoor air supply port, the third air port is communicated with the air inlet channel, the fourth air port is communicated with the air exhaust channel, free switching of the air exhaust channel and the air inlet channel can be achieved by changing the communication of the first air port, the second air port, the third air port and the fourth air port, in addition, when the switching of the air exhaust channel and the air inlet channel is achieved, linkage of a plurality of components is not involved, the air channel switching device is simple in structure, and therefore the failure rate of air channel switching can be reduced.

In some embodiments, the air duct switching mechanism comprises: the air door is positioned in the inner cavity and is rotationally connected with the shell, and the air door comprises a first working position and a second working position when rotating; the transmission shaft and the rotating shaft of the air door are coaxially arranged, one end of the transmission shaft is fixedly connected with one end of the rotating shaft of the air door, and the other end of the transmission shaft penetrates through the first side wall of the shell and extends out of the shell; the other end of the rotating shaft of the air door is connected with the second side wall of the shell; the first side wall and the second side wall are arranged oppositely.

In some embodiments, the other end of the rotating shaft of the air door is provided with a mounting hole; and a fixed shaft is arranged on the second side wall, is positioned in the inner cavity and is coaxially arranged with the mounting hole, and the fixed shaft is in clearance fit with the mounting hole.

In some embodiments, the air duct switching mechanism further comprises: the bearing comprises an inner circular ring and an outer circular ring which can rotate relatively; the bearing is positioned in the mounting hole, the outer circular ring is connected with the circumferential wall surface in the mounting hole, and the inner circular ring is connected with the circumferential wall surface of the fixed shaft;

in some embodiments, the air duct switching device further comprises: the limiting strip is positioned in the inner cavity and is connected with the second side wall; when the air door rotates to the first working position or the second working position, the limiting strip is attached to the wall surface of the air door and used for dividing the inner cavity into two cavities which are not communicated with each other;

in some embodiments, the first sidewall has an opening disposed thereon; the air duct switching device further includes: the apron, apron demountable installation are provided with the through-hole at the opening part of first lateral wall on and the apron, and the other end of transmission shaft stretches out in the casing through the through-hole.

In some embodiments, the air duct switching device further comprises: and the motor is in transmission connection with the other end of the transmission shaft and is used for driving the transmission shaft to rotate.

In a second aspect, the present application further provides a fresh air system, which includes the air duct switching device as described in the first aspect or any one of the implementations.

The new trend system that this application embodiment provided includes wind channel auto-change over device, and this wind channel auto-change over device includes: casing and wind channel switching mechanism. The shell is provided with a hollow outer cavity, and the shell is provided with a plurality of first air ports, second air ports, third air ports and fourth air ports which are communicated with the inner cavity. Therefore, the first air port, the second air port, the third air port and the fourth air port can be communicated with each other through the inner cavity. In addition, air duct switching mechanism sets up in the inner chamber, and rotates with the casing and be connected, and this air duct switching mechanism includes: the air duct switching mechanism is communicated with the first air opening and the third air opening and communicated with the second air opening and the fourth air opening when rotating to the second working position.

So, when first wind gap is outdoor air intake, the second wind gap is indoor supply-air outlet, third wind gap and inlet air duct intercommunication, fourth wind gap and the passageway intercommunication of airing exhaust, through changing the intercommunication of first wind gap, second wind gap and third wind gap, fourth wind gap, can realize the free switching of passageway and inlet air duct of airing exhaust, in addition, this wind channel auto-change over device is when realizing the switching of passageway and inlet air duct of airing exhaust, do not relate to the linkage of a plurality of parts, moreover, the steam generator is simple in structure, thereby the fault rate that the wind channel switches over can be reduced, and then the fault rate of new trend system is reduced.

In some embodiments, the air duct switching device includes a first air duct switching device and a second air duct switching device; the new trend system still includes: the air conditioner comprises a machine body and a heat exchanger, wherein a first air channel and a second air channel which are not communicated with each other are arranged in the machine body; the heat exchanger comprises a first heat exchanger and a second heat exchanger, the surfaces of the first heat exchanger and the second heat exchanger are both provided with moisture absorption parts, the first heat exchanger is arranged in the first air duct, and the second heat exchanger is arranged in the second air duct; a third air port of the first air channel switching device is communicated with one end of the first air channel, and a fourth air port of the first air channel switching device is communicated with one end of the second air channel; and a third air opening of the second air channel switching device is communicated with the other end of the first air channel, and a fourth air opening of the second air channel switching device is communicated with the other end of the second air channel.

In some embodiments, the body further comprises: the outdoor air inlet is communicated with a first air opening of the first air channel switching device, the indoor air inlet is communicated with a first air opening of the second air channel switching device, the outdoor air outlet is communicated with a second air opening of the second air channel switching device, and the indoor air outlet is communicated with a second air opening of the first air channel switching device.

Drawings

Fig. 1 is a schematic perspective view of an air duct switching device according to an embodiment of the present disclosure;

fig. 2 is a schematic perspective view of a housing according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of an air duct switching mechanism according to an embodiment of the present disclosure;

fig. 4 is a second schematic structural diagram of an air duct switching mechanism according to an embodiment of the present application;

fig. 5 is a third schematic structural diagram of an air duct switching mechanism according to an embodiment of the present disclosure;

fig. 6 is a fourth schematic structural diagram of an air duct switching mechanism according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a housing according to an embodiment of the present disclosure;

fig. 8 is a schematic structural diagram of parts of an air duct switching device according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of a bearing according to an embodiment of the present disclosure;

fig. 10 is a schematic structural diagram of an air duct switching device according to an embodiment of the present application;

fig. 11 is a partially enlarged view of an air duct switching device according to an embodiment of the present application;

fig. 12 is a second schematic structural view of a housing according to an embodiment of the present application;

FIG. 13 is a schematic structural diagram of a knob according to an embodiment of the present disclosure;

fig. 14 is a second schematic structural diagram of an air duct switching device according to an embodiment of the present application;

fig. 15 is a schematic structural diagram of a fresh air system according to an embodiment of the present application.

Description of the reference numerals:

100-air duct switching device; 101-a first air duct switching device; 102-a second air duct switching device; 200-a fresh air system; 300-body; 301-a first air duct; 302-a second air duct; 303-outdoor air inlet; 304-outdoor air outlet; 305-indoor air exhaust; 306-indoor air inlet; 400-a heat exchanger; 401 — a first heat exchanger; 402-a second heat exchanger; 10-a housing; 11-lumen; 12-tuyere; 121-a first tuyere; 122-a second tuyere; 123-a third tuyere; 124-fourth tuyere; 13-a first side wall; 131-an opening; 132-a groove; 133-a snap groove; 14-a second side wall; 141-a fixed shaft; 142-a stop bar; 20-an air duct switching mechanism; 21-a first working position; 22-a second working position; 23-a damper; 231-mounting holes; 24-a drive shaft; 30-a bearing; 31-inner circular ring; 32-outer circular ring; 40-a cover plate; 50-a knob; 51-a through hole; 52-connecting hole.

Detailed Description

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

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As described in the background art, with the rapid development of economic society in China, the requirements of people on the comfort level and quality of indoor environments such as office environment and living environment are higher and higher. Generally, people often adopt a fresh air device to improve indoor environment and air quality. In some fresh air devices, the air channels of the fresh air channel and the air exhaust channel in the device are often required to be switched. However, in the related art, too many air valves are often used in combination to achieve the switching of the air channels by cooperatively opening or closing the related air valves. Such excessive dampers make the device complicated in structure and large in occupied space. In addition, too many air valves can complicate the air duct switching process, and the probability of failure is higher.

In view of the above, an embodiment of the present application provides an air duct switching device, and fig. 1 shows a schematic perspective structure diagram of the air duct switching device provided in the embodiment of the present application, and as shown in fig. 1, the air duct switching device 100 includes: a housing 10 and an air duct switching mechanism 20.

Fig. 2 shows a schematic perspective structure of a housing provided in an embodiment of the present application, as shown in fig. 2, the housing 10 has a hollow inner cavity 11, and a plurality of air ports 12 communicated with the inner cavity 11 are provided on the housing 10, where the plurality of air ports 12 include: a first tuyere 121, a second tuyere 122, a third tuyere 123 and a fourth tuyere 124.

Alternatively, the shape of the housing 10 may be a rectangular parallelepiped as shown in fig. 2, and the shape of the housing 10 may also be a cylinder, and the shape of the housing 10 is not limited in this application.

In addition, the shape of the plurality of tuyeres 12 may be triangular, trapezoidal, or circular, and the specific shape of the tuyeres 12 is not limited in the present application and may be set according to specific situations.

Fig. 3 is a schematic structural diagram of an air duct switching mechanism provided in an embodiment of the present application, and as shown in fig. 3, the air duct switching mechanism 20 is disposed in the inner cavity 11 and is rotatably connected to the housing 10 (the air duct switching mechanism 20 is rotatable in the direction of the arrow shown in fig. 3), and the air duct switching mechanism 20 includes: a first operating position 21 and a second operating position 22, and if the air duct switching mechanism 20 rotates to the first operating position 21, the air duct switching mechanism 20 communicates the first air opening 121 and the third air opening 123, and communicates the second air opening 122 and the fourth air opening 124. If the air duct switching mechanism 20 rotates to the second operating position 22, the air duct switching mechanism 20 communicates the first air opening 121 and the fourth air opening 124, and communicates the second air opening 122 and the third air opening 123.

In fig. 3, the first tuyere 121 and the second tuyere 122 are respectively located on the wall surfaces of the opposite sides of the casing 10, and the third tuyere 123 and the fourth tuyere 124 are located on the same wall surface. It is understood that the third tuyere 123 and the fourth tuyere 124 may be located on different wall surfaces.

Optionally, the third tuyere 123 may also be located on the upper wall surface of the casing 10, and the fourth tuyere 124 is located on the lower wall surface of the casing 10; optionally, the third tuyere 123 may be further located on a side wall surface, and the fourth tuyere 124 may be further located on an upper wall surface of the casing 10. Here, "upper" and "lower" are upper and lower in the Y axis direction in fig. 3. It can be understood that the positions of the first air opening 121, the second air opening 122, the third air opening 123 and the fourth air opening 124 may satisfy the communication relationship of the air duct switching mechanism 20 in the first working position 21 and the second working position 22, and the specific positions of the first air opening 121, the second air opening 122, the third air opening 123 and the fourth air opening 124 are not limited in this application.

The air duct switching device 100 provided in the embodiment of the present application includes: a housing 10 and an air duct switching mechanism 20. Wherein, the housing 10 has a hollow outer cavity, and the housing 10 is provided with a plurality of first, second, third and

fourth ports

121, 122, 123 and 124 communicated with the inner cavity 11. Accordingly, the first tuyere 121, the second tuyere 122, the third tuyere 123, and the fourth tuyere 124 may communicate with each other through the inner cavity 11. In addition, the air duct switching mechanism 20 is disposed in the inner cavity 11 and is rotatably connected to the housing 10, and the air duct switching mechanism 20 includes: a first operating position 21 and a second operating position 22, if the air duct switching mechanism 20 rotates to the first operating position 21, the air duct switching mechanism 20 communicates with the first air opening 121 and the third air opening 123, and communicates with the second air opening 122 and the fourth air opening 124, and when the air duct switching mechanism 20 rotates to the second operating position 22, the air duct switching mechanism 20 communicates with the first air opening 121 and the fourth air opening 124, and communicates with the second air opening 122 and the third air opening 123.

So, when first wind gap 121 is outdoor air intake, second wind gap 122 is indoor supply-air outlet, third wind gap 123 and new trend passageway intercommunication, fourth wind gap 124 and the passageway intercommunication of airing exhaust, through changing the intercommunication of first wind gap 121, second wind gap 122 and third wind gap 123, fourth wind gap 124, can realize the free switching of new trend passageway and inlet air channel, in addition, this wind channel auto-change over device 100 is when realizing the switching of new trend passageway and inlet air channel, and do not involve the linkage of a plurality of parts, and the steam generator is simple in structure, thereby can reduce the fault rate of wind channel auto-change over device 100.

Fig. 4 and 5 are schematic structural diagrams of an air duct switching mechanism provided in an embodiment of the present application, wherein fig. 4 and 5 are schematic perspective structural diagrams of the air duct switching mechanism 20 in different orientations. In some embodiments, as shown in fig. 4 and 5, the air duct switching mechanism 20 includes: a damper 23 and a drive shaft 24. The air door 23 is located in the inner cavity 11, the air door 23 is rotatably connected with the casing 10, and when the air door 23 rotates, the air door 23 comprises: a first operating position 21 and a second operating position 22. As shown in fig. 6, the transmission shaft 24 is coaxially disposed with the rotation shaft of the damper 23, one end of the transmission shaft 24 is fixedly connected with one end of the rotation shaft of the damper 23, and the other end of the transmission shaft 24 penetrates through the first side wall 13 of the housing 10 and extends out of the housing 10; the other end of the rotating shaft of the air door 23 is connected with the second side wall 14 of the shell 10; the first side wall 13 is disposed opposite to the second side wall 14. In this way, the transmission shaft 24 is rotated outside the housing 10, and the transmission shaft 24 and the damper 23 are coaxially disposed and fixedly connected, so that the damper 23 can be driven to rotate, and the damper 23 can be rotated to the first operating position 21 or the second operating position 22.

Wherein, optionally, the fixed connection of the rotating shafts of the transmission shaft 24 and the air door 23 can be an integrated structure, that is, the transmission shaft 24 and the air door 23 are an integrated structure formed by an integrated molding technology, so that the connection strength of the transmission shaft 24 and the air door 23 is ensured, the process of connecting the transmission shaft 24 and the air door 23 is reduced, and the assembly efficiency of the worker assembling the air duct switching device 100 is improved.

Alternatively, the fixed connection between the transmission shaft 24 and the rotation shaft of the damper 23 may also be a non-detachable fixed connection, such as welding, gluing, riveting, and the like. In this way, the damper 23 and the transmission shaft 24 can be transported separately during transportation and then fixedly connected to each other when arriving at the assembly plant. Therefore, the space occupied by the air door 23 and the transmission shaft 24 during transportation can be reduced, the transportation cost is saved, and the connection strength of the air door 23 and the transmission shaft 24 is ensured.

Optionally, the fixed connection between the transmission shaft 24 and the rotation shaft of the air door 23 may also be a detachable fixed connection, for example, a threaded connection, a pin connection, a hook connection, etc., so that the space occupied by the air door 23 and the transmission shaft 24 during transportation can be reduced, and the transportation cost is saved. And when the transmission shaft 24 or the air door 23 is damaged, the transmission shaft 24 or the air door 23 can be directly disassembled and replaced, so that the maintenance cost and the time required by maintenance are reduced.

Fig. 6 shows a schematic perspective view of a damper provided in an embodiment of the present application, and fig. 7 shows a schematic structural view of a housing provided in an embodiment of the present application. In one possible implementation, as shown in fig. 6 and 7, a mounting hole 231 is provided at one end of the rotation shaft of the damper 23 close to the second side wall 14, a fixing shaft 141 is provided on the second side wall 14, the fixing shaft 141 is located in the inner cavity 11 and is coaxially arranged with the mounting hole 231, and the fixing shaft 141 is in clearance fit with the mounting hole 231. The mounting hole 231 of the damper 23 can be fitted over the fixed shaft 141, rotated in the circumferential direction of the fixed shaft 141, and moved to the first operating position 21 or the second operating position 22. Thus, the damper 23 and the housing 10 can be rotatably connected, the structure is simple, the load of the damper 23 is borne by the fixed shaft 141, and the damper 23 can be rotated stably.

In another possible implementation manner, one end of the damper 23 close to the second side wall 14 is provided with a connecting shaft, and the second side wall 14 is provided with a circular hole, which is located in the inner cavity 11 and is coaxially arranged with the connecting shaft, and the circular hole is in clearance fit with the connecting shaft. Thus, the connecting shaft of the damper 23 is inserted into the circular hole and can rotate in the circumferential direction of the circular hole, so that the damper 23 rotates to the first operating position 21 or the second operating position 22.

In other embodiments, the damper 23 is positioned within the interior chamber 11 and the damper 23 includes a first operating position 21 and a second operating position 22 when rotated. The transmission shaft 24 is coaxial with the rotating shaft of the air door 23, one end of the transmission shaft 24 penetrates through the rotating shaft of the air door 23 and is in transmission connection with the second side wall 14 of the shell 10, the transmission shaft 24 is fixedly connected with the air door 23, and the other end of the transmission shaft 24 penetrates through the first side wall 13 and extends out of the shell 10. Thus, when the transmission shaft 24 is rotated, the damper 23 fixed on the transmission shaft 24 is driven, and the damper 23 is rotated to the first working position 21 or the second working position 22.

The fixed connection between the transmission shaft 24 and the rotation shaft of the damper 23 can refer to the above description, and the details of this application are not repeated.

In addition, the rotational connection between the transmission shaft 24 and the second side wall 14 can also refer to the transmission connection between the damper 23 and the second side wall 14, and the description of the present application is omitted.

Fig. 8 is a schematic structural diagram of components of an air duct switching device according to an embodiment of the present application, and in order to improve the smoothness of the rotation of the fan, in some embodiments, as shown in fig. 8, the air duct switching mechanism 20 further includes: the bearing 30, fig. 9 shows a schematic structural diagram of the bearing provided in the embodiment of the present application, and as shown in fig. 9, the bearing 30 includes an inner ring 31 and an outer ring 32 capable of rotating relatively, where the inner ring 31 and the outer ring 32 are connected to the damper 23 and the second side wall 14, respectively.

In one possible implementation, the bearing 30 is located in the mounting hole, and the outer ring 32 is connected to the circumferential wall surface in the mounting hole, and the inner ring 31 is connected to the circumferential wall surface of the fixed shaft 141. Thus, when the damper 23 rotates, the mounting hole 231 rotates along the circumferential direction of the fixing shaft 141, and the bearing 32 is disposed between the mounting hole 231 and the fixing shaft 141, so that the bearing 32 can reduce the friction coefficient (friction coefficient) in the movement process and ensure the rotation precision (accuracy), thereby reducing the wear of the mounting hole 231 and the fixing shaft 141, reducing the noise generated by the friction between the mounting hole 231 and the fixing shaft 141 when rotating, and improving the fluency of the damper 23 when rotating.

In another possible implementation, the bearing 32 is installed in a circular hole, the outer ring 32 of the bearing 32 is connected with the circumferential wall surface of the circular hole, and the inner ring 31 of the bearing 32 is connected with the axial wall surface of the connecting shaft. Therefore, abrasion and noise caused by friction between the connecting shaft and the round hole can be reduced, and the rotating fluency of the air door 23 is improved.

In some embodiments, the circumferential length of the inner cavity 11 is greater than or equal to the length of the damper 23 in the vertical direction (i.e., the Y-axis direction in fig. 3), so that the damper 23 can rotate in the inner cavity 11 in the circumferential direction (i.e., the damper 23 can rotate in the axial direction by 360 °), and thus the damper 23 can be rotated to the first working position 21 or the second working position 22 by adjusting the rotation angle of the damper 23.

It will be appreciated that rotation of the damper 23 to either the first operating position 21 or the second operating position 22 separates the internal chamber 11 by two chambers. In order to improve the sealing between the two chambers, in some embodiments, an elastic material is connected to the circumferential wall surface in the inner chamber 11, the elastic material extends in a direction parallel to the axial direction of the damper 23, and when the damper 23 rotates to the first operating position 21 or the second operating position 22, the elastic material contacts the damper 23 to improve the sealing between the two chambers.

In some embodiments, as shown in FIG. 3, the length of the interior chamber 11 in the vertical direction (Y-axis direction) is less than the length of the damper 23 in the vertical direction to rotate the damper 23 between the first and second operating positions 21, 22. In this way, the damper 23 effects switching between the first operating position 21 and the second operating position 22 by rotating in a forward direction (i.e., clockwise rotation) or in a reverse direction (i.e., counterclockwise rotation).

Fig. 10 shows a schematic structural diagram of an air duct switching device provided in an embodiment of the present application. In one possible implementation, the air duct switching device 100 further includes: a limiting strip 142, wherein the limiting strip 142 is positioned in the inner cavity 11 and connected with the second side wall 14; when the damper 23 rotates to the first operating position 21 or the second operating position 22, the limiting strip 142 is attached to the wall surface of the damper 23, so that the damper 23 is limited and sealed, and the inner cavity 11 is divided into two chambers which are not communicated with each other. In this way, the sealing properties of the two chambers can be improved.

It can be understood that, in order to prevent the side surface of the damper 23 (i.e., the surface of the damper 23 in the Z-axis direction in fig. 3) from directly contacting the housing 10, as shown in fig. 11, the length of the damper 23 in the rotation axis direction is smaller than the length of the inner cavity 11 in the rotation axis direction of the damper 23, so that the damper 23 is limited and sealed by the limiting strip 142 when rotated to the first operating position 21 or the second operating position 22.

In addition, to facilitate production of the air duct switching device 100, in some embodiments, fig. 12 shows a schematic structural diagram of the housing provided in the embodiments of the present application, and as shown in fig. 12, the first side wall 13 is provided with an opening 131; the opening 131 communicates with the inner chamber 11. As shown in fig. 8, the air duct switching device 100 further includes: and a cover plate 40, wherein the cover plate 40 is detachably mounted at the opening of the first side wall 13, a through hole is formed in the cover plate 40, and the other end of the transmission shaft 24 extends out of the housing 10 through the through hole. When the air door 23 and the transmission shaft 24 are installed, the air door can be installed through the opening 131, and after the installation is completed, the cover plate 40 can be covered on the opening 131, so that the installation of workers is facilitated, and the working efficiency of the workers is improved.

Similarly, the first side wall 13 may also be provided with a limiting strip 142, which can refer to the limiting strip 142 on the second side wall 13, and this application is not described herein again.

The detachable connection may be a threaded connection, a pin connection, or the like, which is not limited in this application. Since the screw connection can generate a large axial force when being tightened, and the screw connection is simple to manufacture and can maintain high accuracy, the connection between the cover plate 40 and the first side wall 13 of the housing 10 according to the embodiment of the present invention is a screw connection.

In order to improve the sealing performance of the connection between the cover plate 40 and the first side wall 13, in some embodiments, as shown in fig. 12, a groove 132 is provided in the circumferential direction of the opening, and the air duct switching device 100 further includes: and a sealing material disposed in the groove 132 to seal a connection of the cap plate 40 and the first sidewall 13. Therefore, the gas in the shell 10 can be prevented from flowing out from the opening to influence the flow of the gas in the air channel.

Optionally, the sealing material may be heat insulation cotton, and the sealing material may also be a rubber ring, which is not limited in this application.

In some embodiments, the air duct switching device 100 further includes: and the motor is in transmission connection with one end, extending out of the shell 10, of the transmission shaft 24 and is used for driving the transmission shaft 24 to rotate, so that the air door 23 is rotated to the first working position 21 or the second working position 22. In this way, the user does not need to rotate the transmission shaft 24, and the use is convenient for the user.

In other embodiments, as shown in fig. 8, the air duct switching device 100 further includes: and a knob 50, wherein the knob 50 is connected to the transmission shaft 24 and is coaxially arranged with the transmission shaft 24 for facilitating the rotation of a user.

Fig. 13 shows a schematic structural diagram of the knob according to the embodiment of the present application, as shown in fig. 13, a through hole 51 may be formed along an axial direction of the knob 50, a cross section of the through hole 51 may be square, triangular, rectangular, and the like, and the transmission shaft 24 is provided with a connecting member connected with the through hole 51. The cross-sectional shape of the through-hole 51 is not limited in the present application.

It can be understood that, in order to facilitate the user to know the working position of the damper 23, in some embodiments, a connection hole 52 is further formed in the circumferential direction of the through hole 51 of the knob 50, the connection hole 52 is communicated with the through hole 51, and a connection member that is matched with the through hole 51 and the connection hole 52 is provided on the transmission shaft 24, so that the wrong installation position of the knob 50 can be avoided, and the long side direction of the knob 50 is not matched with the working position of the damper 23.

Further, in order to fix the position of the air door 23 at the working position conveniently, as shown in fig. 14, a schematic structural diagram of the air duct switching device provided in the embodiment of the present application is shown, in some embodiments, as shown in fig. 14, a plurality of clamping grooves 133 are circumferentially arranged at the through hole, the plurality of clamping grooves 133 are annularly and alternately distributed, the annular clamping grooves 133 are coaxial with the transmission shaft 24, the clamping grooves 133 are connected with the cover plate 40 and located outside the inner cavity 11, and any one of the clamping grooves 133 can be clamped with the long side direction of the knob 50. The plurality of catching grooves 133 may be serrated. That is, the operating position of the damper 23 may be controlled by inserting the knob 50 into a different snap groove 133. Therefore, the air door 23 can be prevented from being blown to rotate when outdoor air enters, the working position of the air door 23 is changed, and therefore the air channel cannot be freely switched, and the user experience is influenced.

In a second aspect, an embodiment of the present application provides a fresh air system 200, where the fresh air system 200 includes: the air duct switching device 100, and the air duct switching device 100 can refer to the description of the first aspect, and the description of the present application is omitted here.

The fresh air system 200 provided by the embodiment of the application includes an air duct switching device 100, and the air duct switching device 100 includes: a housing 10 and an air duct switching mechanism 20. Wherein, the housing 10 has a hollow outer cavity, and the housing 10 is provided with a plurality of first, second, third and

fourth ports

121, 122, 123 and 124 communicated with the inner cavity 11. Accordingly, the first tuyere 121, the second tuyere 122, the third tuyere 123, and the fourth tuyere 124 may communicate with each other through the inner cavity 11. In addition, the air duct switching mechanism 20 is disposed in the inner cavity 11 and is rotatably connected to the housing 10, and the air duct switching mechanism 20 includes: the first operating position 21 and the second operating position 22, if the air duct switching device 100 rotates to the first operating position 21, the air duct switching mechanism 20 communicates with the first air opening 121 and the third air opening 123, and communicates with the second air opening 122 and the fourth air opening 124, and when the air duct switching mechanism 20 rotates to the second operating position 22, the air duct switching mechanism 20 communicates with the first air opening 121 and the fourth air opening 124, and communicates with the second air opening 122 and the third air opening 123.

Therefore, when the first air inlet 121 is an outdoor air inlet, the second air inlet 122 is an indoor air supply inlet, the third air inlet 123 is communicated with the air inlet channel, the fourth air inlet 124 is communicated with the air exhaust channel, the free switching between the air exhaust channel and the air inlet channel can be realized by changing the communication among the first air inlet 121, the second air inlet 122, the third air inlet 123 and the fourth air inlet 124, in addition, the air channel switching device 100 does not involve linkage of a plurality of components when the switching between the air exhaust channel and the air inlet channel is realized, the structure is simple, the failure rate of air channel switching can be reduced, and further, the failure rate of the fresh air system 200 is reduced.

Fig. 15 is a schematic structural diagram of a fresh air system provided in an embodiment of the present application, and in some embodiments, as shown in fig. 15, the air duct switching device 100 includes a first air duct switching device 101 and a second air duct switching device 102; this new trend system 200 still includes: a body 300, wherein a first air duct 301 and a second air duct 302 which are not communicated with each other are arranged in the body 300; the heat exchanger 400 includes a first heat exchanger 401 and a second heat exchanger 402, the first heat exchanger 401 and the second heat exchanger 402 are both provided with a moisture absorption portion on the surface, the first heat exchanger 401 is disposed in the first air duct 301, and the second heat exchanger 402 is disposed in the second air duct 302. The third air opening 123 of the first air channel switching device 101 is communicated with one end of the first air channel 301, and the fourth air opening 124 of the first air channel switching device 101 is communicated with one end of the second air channel 302; the third air opening 123 of the second air duct switching device 102 is communicated with the other end of the first air duct 301, and the fourth air opening 124 of the second air duct switching device 102 is communicated with the other end of the second air duct 302.

Wherein, the moisture absorption part is provided with materials with better water absorption performance, such as adsorption resin, sponge and the like, which are not limited in the application.

It is understood that the first air opening 121 of the first air duct 301 may communicate with the outdoor, the second air opening 122 of the first air duct 301 may communicate with the indoor, the first air opening 121 of the second air duct switching device 102 may communicate with the outdoor, and the second air opening 122 of the second air duct switching device 102 may communicate with the indoor. Thus, by controlling the operating positions of the dampers 23 of the first air channel switching device 101 and the second air channel switching device 102, the first air channel 301 can be changed from the fresh air channel to the exhaust air channel, and the second air channel 302 can be changed from the exhaust air channel to the fresh air channel, or the first air channel 301 can be changed from the exhaust air channel to the fresh air channel, and the second air channel 302 can be changed from the fresh air channel to the exhaust air channel. This simple structure, occupation space is less, and simple structure reduces new trend system 200's fault rate.

In some embodiments, as shown in fig. 15, the housing 300 is further provided with an outdoor air inlet 303, an outdoor air outlet 304, an indoor air outlet 305, and an indoor air inlet 306, the outdoor air inlet 303 is communicated with the first air opening 121 of the first air channel switching device 101, the indoor air inlet 306 is communicated with the first air opening 121 of the second air channel switching device 102, the outdoor air outlet 304 is communicated with the second air opening 122 of the second air channel switching device 102, and the indoor air outlet 305 is communicated with the second air opening 122 of the first air channel switching device 101. So, outdoor new trend's flow direction can be divided into following two states:

state 1 (the dampers 23 of the first air channel switching device 101 and the second air channel switching device 102 are both in the first working state):

when the outdoor fresh air enters: the outdoor air inlet 303, the first air opening 121 of the first air channel switching device 101, the third air opening 123 of the first air channel switching device 101, the first air channel 301, the third air opening 123 of the second air channel switching device 102, the first air opening 121 of the second air channel switching device 102, and the indoor air inlet 305.

When the indoor fresh air is exhausted: the indoor air outlet 305, the second air opening 122 of the first air channel switching device 101, the fourth air opening 124 of the first air channel switching device 101, the second air channel 302, the fourth air opening 124 of the second air channel switching device 102, the second air opening 122 of the second air channel switching device 102, and the outdoor air outlet 304.

State 2 (the air doors 23 of the first air channel switching device 101 and the second air channel switching device 102 are both in the second working state)

When the outdoor fresh air enters: the outdoor air inlet 303, the first air opening 121 of the first air channel switching device 101, the fourth air opening 124 of the first air channel switching device 101, the second air channel 302, the fourth air opening 124 of the second air channel switching device 102, the first air opening 121 of the second air channel switching device 102, and the indoor air inlet 305.

When the indoor fresh air is discharged: indoor air outlet 305, second air outlet 122 of first air channel switching device 101, third air outlet 123 of first air channel switching device 101, first air channel 301, third air outlet 123 of second air channel switching device 102, second air outlet 122 of second air channel switching device 102, and outdoor air outlet 304.

Therefore, the free switching between the fresh air channel and the exhaust air channel is realized by controlling the air doors 23 of the first air channel switching device 101 and the second air channel switching device 102, the structure is simple, and the failure rate of the fresh air system 200 is reduced.

In some embodiments, as shown in fig. 15, the fresh air system 200 further includes: a first fan 501 and a second fan 502, wherein the first fan 501 is installed at the outdoor air outlet 304 for sucking indoor air out of the room, and the second fan 502 is installed at the indoor air inlet 305 for sucking outdoor fresh air into the room. It can be understood that the adoption of the suction of fresh air or the suction of indoor air can reduce the resistance borne by the air during flowing and improve the air intake, thereby improving the working efficiency of the fan.

In other embodiments, the first fan 501 is installed at the outdoor air inlet 303 for blowing fresh air from the outdoor space into the indoor space, and the second fan 502 is installed at the indoor air outlet 305 for blowing air from the indoor space out of the indoor space.

For the convenience of the user, in some embodiments, the fresh air system 200 further includes: and a controller electrically connected to the motor for controlling a rotation direction and a rotation angle of a rotation shaft of the motor so that the air duct switching mechanism 20 can rotate to the first operating position 21 or the second operating position 22. In this way, the user can control the operating positions of the dampers 23 of the first air duct switching device 101 and the second air duct switching device 102 through the controller. The operation of the user is facilitated, and the user experience is improved.

To further enhance the user experience, in some embodiments, the ventilation system 200 further comprises: the compressor, this compressor is connected with the heat exchanger for the temperature of adjustment entering indoor new trend, thereby the adjustment indoor temperature improves user experience.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An air duct switching device, comprising:

the casing has hollow inner chamber, just be provided with on the casing with a plurality of wind gaps of inner chamber intercommunication, it is a plurality of the wind gap includes: the first air port, the second air port, the third air port and the fourth air port;

the air duct switching mechanism is positioned in the inner cavity and is rotationally connected with the shell; the air duct switching mechanism comprises: a first working position and a second working position; if the air duct switching mechanism rotates to the first working position, the air duct switching mechanism is communicated with the first air opening and the third air opening and is communicated with the second air opening and the fourth air opening; if the air duct switching mechanism rotates to the second working position, the air duct switching mechanism is communicated with the first air opening and the fourth air opening and is communicated with the second air opening and the third air opening.

2. The air duct switching device according to claim 1, wherein the air duct switching mechanism comprises:

the air door is positioned in the inner cavity, is rotatably connected with the shell and comprises the first working position and the second working position when rotating;

the transmission shaft is coaxially arranged with the rotating shaft of the air door, one end of the transmission shaft is fixedly connected with one end of the rotating shaft of the air door, and the other end of the transmission shaft penetrates through the first side wall of the shell and extends out of the shell; the other end of the rotating shaft of the air door is connected with the second side wall of the shell; the first side wall is arranged opposite to the second side wall.

3. The air duct switching device according to claim 2, wherein the other end of the rotating shaft of the damper is provided with a mounting hole; and a fixing shaft is arranged on the second side wall, is positioned in the inner cavity and is coaxially arranged with the mounting hole, and the fixing shaft is in clearance fit with the mounting hole.

4. The air duct switching device according to claim 3, wherein the air duct switching mechanism further comprises:

the bearing comprises an inner circular ring and an outer circular ring which can rotate relatively; the bearing is located in the mounting hole, the outer circular ring is connected with the circumferential wall surface in the mounting hole, and the inner circular ring is connected with the circumferential wall surface of the fixing shaft.

5. The air duct switching device according to claim 3, further comprising:

the limiting strip is positioned in the inner cavity and is connected with the second side wall; when the air door rotates to the first working position or the second working position, the limiting strip is attached to the wall surface of the air door and used for dividing the inner cavity into two chambers which are not communicated with each other.

6. The air duct switching device according to claim 3, wherein the first side wall is provided with an opening;

the air duct switching device further includes: the cover plate is detachably mounted at the opening of the first side wall, a through hole is formed in the cover plate, and the other end of the transmission shaft extends out of the shell through the through hole.

7. The air duct switching device according to claim 6, further comprising: and the motor is in transmission connection with the other end of the transmission shaft and is used for driving the transmission shaft to rotate.

8. A fresh air system, comprising: the air duct switching device according to any one of claims 1 to 7.

9. The fresh air system as claimed in claim 8, wherein the air duct switching device comprises a first air duct switching device and a second air duct switching device;

the new trend system still includes: the air conditioner comprises a machine body, wherein a first air channel and a second air channel which are not communicated with each other are arranged in the machine body;

the heat exchanger comprises a first heat exchanger and a second heat exchanger, moisture absorption portions are formed on the surfaces of the first heat exchanger and the second heat exchanger, the first heat exchanger is arranged in the first air duct, and the second heat exchanger is arranged in the second air duct;

a third air port of the first air channel switching device is communicated with one end of the first air channel, and a fourth air port of the first air channel switching device is communicated with one end of the second air channel;

and a third air opening of the second air channel switching device is communicated with the other end of the first air channel, and a fourth air opening of the second air channel switching device is communicated with the other end of the second air channel.

10. The fresh air system of claim 9 wherein the body further comprises: outdoor air intake, outdoor air exit, indoor air exit and indoor air intake, outdoor air intake with first wind gap intercommunication of first wind channel auto-change over device, indoor air intake with the first wind gap intercommunication of second wind channel auto-change over device, outdoor air exit with the second wind gap intercommunication of second wind channel auto-change over device, indoor air exit with the second wind gap intercommunication of first wind channel auto-change over device.