Air inlet switching structure and air conditioner

Abstract

The utility model relates to an air inlet switching structure and an air conditioner. The air inlet switching structure comprises a shell, blades and a transmission assembly. The air inlet end face of the shell is provided with at least two air inlets arranged at intervals. The transmission assembly comprises a driving piece and at least one connecting piece; the connecting piece is slidably connected to the shell, and the movable end of the driving piece is in transmission connection with the connecting piece so as to drive the connecting piece to slide relative to the shell. Each air inlet is correspondingly provided with a group of blades, and the blades are rotationally connected with the shell so as to open or close the air inlets; the blades are movably connected with the connecting pieces, and the connecting pieces drive the blades to rotate relative to the shell. According to the air inlet switching structure, the connecting piece is directly arranged relative to the blades in a sliding mode, the connecting piece slides relative to the shell to drive all the blades to rotate in a directional mode, linkage of upper air inlet and lower air inlet is achieved, switching between fresh air and return air is facilitated, the structure is simple, and stability is good.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning, in particular to an air inlet switching structure and an air conditioner. Background Art

[0002] With the development of the economy, air conditioners have gradually become an indispensable appliance in people's daily lives. Whether it is used for cooling in hot weather or heating in cold weather, it can help people get a comfortable ambient temperature. However, traditional air conditioners circulate indoor air. In this process, the indoor air becomes turbid due to the lack of fresh air exchange with the outside world, which is not good for human health. For this reason, fresh air air conditioners with fresh air function came into being. Fresh air air conditioners have a fresh air system that can exchange fresh air with the outside world, which can not only adjust the indoor temperature but also ensure the freshness of the indoor air.

[0003] In the air conditioning unit, the fresh air duct and the indoor circulation duct are used in a switchable manner. Normally, opening the fresh air duct will close the indoor circulation duct, and vice versa. The traditional structure for controlling the opening and closing of the fresh air duct and the indoor circulation duct is generally designed independently, which is costly and not light enough for household units; and the stability of controlling the two separately through the electronic control program is poor. In order to solve this problem, the prior art uses a transmission mechanism to set the fresh air inlet and the return air inlet through the shell of an air valve for switching control, which reduces the cost of the air valve and makes the overall structure more compact; however, the connecting rod transmission method has many moving pairs, complex design, and large cumulative errors. Utility Model Content

[0004] Based on this, the purpose of the utility model is to provide an air inlet switching structure, which is directly set to slide relative to multiple blades through a connecting piece. The sliding of the connecting piece relative to the shell drives the directional rotation of all blades, thereby realizing the linkage between the upper and lower air inlets, facilitating the mutual switching of fresh air and return air, with simple structure and good stability.

[0005] An air inlet switching structure, comprising:

[0006] The housing has an air inlet end surface with at least two air inlets spaced apart from each other;

[0007] The transmission assembly comprises a driving member and at least one connecting member; the connecting member is slidably connected to the housing, and the movable end of the driving member is transmission-connected to the connecting member to drive the connecting member to slide relative to the housing;

[0008] A group of blades is correspondingly provided for each air inlet, and the blades are rotatably connected to the shell to open or close the air inlet; and the blades are movably connected to the connecting member, and the connecting member drives the blades to rotate relative to the shell.

[0009] Furthermore, the air inlet end surface of the shell is provided with a fresh air inlet and a return air inlet at intervals;

[0010] The blades include two groups, namely a first blade and a second blade. The first blade is rotatably arranged at the fresh air inlet, and the second blade is rotatably arranged at the return air inlet. When the first blade is parallel to the fresh air inlet plane, the second blade is at a certain angle to the return air inlet plane; or, when the second blade is parallel to the return air inlet plane, the first blade is at a certain angle to the fresh air inlet plane. In a working state, the rotation directions of the first blade and the second blade are opposite.

[0011] Further, the connecting member is slidably connected to the side wall of the housing, and the connecting member is provided with a gear segment along its sliding direction;

[0012] The fixed end of the driving member is fixedly connected to the housing; the movable end of the driving member is provided with a transmission gear which meshes with the gear segment to drive the connecting member to slide relative to the housing.

[0013] Further, the rotation axes of the first blade and the second blade are arranged perpendicular to the connecting member;

[0014] The connecting member is provided with a first sliding groove, and the end of the first blade is provided with a first sliding portion, and the first sliding portion is slidably connected to the first sliding groove;

[0015] The connecting member is further provided with a second sliding groove, and the end of the second blade is provided with a second sliding portion, and the second sliding portion slides in the second sliding groove;

[0016] The sliding track of the first sliding part is symmetrical to the sliding track of the second sliding part.

[0017] Further, the first blade and the second blade each include a plurality of swing blades; the swing blade is provided with a rotating portion, a flow guiding portion and an abutting portion;

[0018] The end of the guide portion and / or the abutting portion is fixedly connected to the first sliding portion; or the end of the guide portion and / or the abutting portion is fixedly connected to the second sliding portion;

[0019] The two ends of the rotating part are provided with protruding rotating shafts, which are rotatably connected to the housing through the rotating shafts; or, the two ends of the rotating part are provided with pin holes, and the housing is correspondingly provided with shaft pins, and the shaft pins are rotatably inserted into the pin holes;

[0020] The guide portion is arranged obliquely, one end of which is connected to the rotating portion, and the other end of which is connected to the abutting portion;

[0021] When the fresh air inlet or the return air inlet is in a closed state, the abutting portion abuts against the rotating portion of the adjacent swing blade.

[0022] Furthermore, the first sliding part is provided with an adapter plate and a slider; the adapter plate is triangular, and one edge of which is fixed to the end of the guide part and the abutment part; one end of the slider is fixed to the top angle of the adapter plate opposite to the edge, and the other end of the slider is slidably arranged in the first sliding groove.

[0023] Furthermore, the transmission assembly includes a driving member and two connecting members, the two connecting members are arranged perpendicular to the rotation axis of the swing blade and are respectively slidably connected to the two side walls of the housing;

[0024] The driving member is provided with a fixed end and two movable ends. The two movable ends are coaxially arranged on both sides of the fixed end and are respectively transmission-connected with one of the connecting members to drive the corresponding connecting member to slide relative to the shell.

[0025] Further, the housing is provided with a positioning portion, the positioning portion is provided between the fresh air inlet and the return air inlet, the positioning portion is provided with two elastic buckles at intervals, the fixed end of the driving member is fixedly connected to the positioning portion and is provided between the two elastic buckles; the movable end of the driving member is rotatably clamped to the elastic buckle;

[0026] The connecting member is provided with a notch at a position corresponding to the movable end of the driving member, and the gear segment is arranged at the notch and parallel to the air inlet end surface of the shell, and meshes with the movable end of the driving member.

[0027] Further, the shell includes a first shell and a second shell, the first shell is slidably connected to the second shell; the first shell is provided with a first fresh air inlet and a first return air inlet, and the second shell is provided with a second fresh air inlet and a second return air inlet; the first blade is provided between the first fresh air inlet and the second fresh air inlet, and the second blade is provided between the first return air inlet and the second return air inlet.

[0028] The utility model also provides an air conditioner, comprising the air inlet switching structure of the utility model.

[0029] The beneficial effects of the utility model are as follows:

[0030] (1) Through the simple mechanical structure linkage design, other complex transmission structures and control components are reduced, making the overall structure simpler, the cost lower, and the performance more stable;

[0031] (2) A connecting member is directly arranged to slide relative to multiple blades. The sliding of the connecting member relative to the housing drives all blades to rotate in a directional manner, thereby realizing the linkage of upper and lower air intakes and facilitating the mutual switching of fresh air and return air;

[0032] (3) By setting the swing blade to a bionic wing design, it not only has a certain diversion effect, but also enables the front and rear swing blades to be in a sealed state when the swing blade moves to a certain position;

[0033] (4) The components are detachable to facilitate assembly and repair, and subsequent maintenance is simple.

[0034] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 An exploded schematic diagram of an air inlet switching structure provided in an embodiment of the present application;

[0036] Figure 2 A schematic diagram of the structure of the air inlet switching structure provided in the embodiment of the present application Figure 1 ;

[0037] Figure 3 A schematic diagram of the structure of the air inlet switching structure provided in the embodiment of the present application Figure 2 ;

[0038] Figure 4 is a schematic diagram of the structure of the outer frame;

[0039] Figure 5 is a schematic diagram of the structure of the swing blade;

[0040] Figure 6 This is a schematic diagram of the assembly of the swing blade;

[0041] Figure 7 is a schematic diagram of the structure of the transmission component;

[0042] Figure 8 A schematic diagram of the structure of the connecting parts.

[0043] In the figure: 10-shell; 11-first shell; 111-first fresh air outlet; 112-first return air outlet; 113-fresh air duct interface; 114-first wind shield; 115-second wind shield; 116-wind shield bottom plate; 117-elastic buckle; 12-second shell; 121-second fresh air outlet; 122-second return air outlet; 123-sliding slot; 13-installation slot; 20-blade; 21-first blade; 211-first sliding part; 211 1-adapter plate; 2112-slider; 22-second blade; 221-second sliding part; 30-transmission component; 31-connector; 311-first connector; 312-second connector; 313-first slide slot; 314-second slide slot; 315-notch; 316-gear segment; 32-driving member; 321-fixed end; 322-movable end; 40-swing blade; 41-rotating part; 411-rotating shaft; 42-flow guide part; 43-abutting part; DETAILED DESCRIPTION

[0044] The air conditioner with fresh air function is provided with a fresh air duct and a return air duct. When working, one of these two ducts is opened and the other is closed, and the opening or closing of the duct is controlled by the air inlet switching structure. The air inlet switching structure usually sets a fresh air valve and a return air valve, and controls the two valves separately, which is costly, and the stability of controlling the two valves separately through the electronic control program is poor. In order to solve this problem, the prior art adopts a transmission mechanism to set a fresh air inlet and a return air inlet through the shell of an air valve for switching control, which reduces the cost of the air valve and makes the overall structure more compact; however, the connecting rod transmission method has many moving pairs, complex design, and large cumulative errors.

[0045] To this end, the utility model provides an air inlet switching structure, which realizes the simultaneous control of the rotation of all blades by setting a connecting piece, thereby realizing the coordinated control of the opening and closing of the air inlet, avoiding control failures, and effectively streamlining the structure and reducing costs.

[0046] See also Figure 1-8The utility model provides an air inlet switching structure, including a shell 10, a plurality of blades 20 and a transmission assembly 30. Specifically, the transmission assembly 30 includes a driving member 32 and at least one connecting member 31; the connecting member 31 is slidably connected to the shell 10; at the same time, the driving member 32 is provided with a fixed end 321 and at least one movable end 322, wherein the movable end 322 is transmission-connected to the connecting member 31 to drive the connecting member 31 to slide relative to the shell 10. The air inlet end surface of the shell 10 is provided with at least two air inlets arranged at intervals, each of which is provided with a group of blades 20, and the blades 20 are rotatably connected to the shell 10, so that the blades 20 can rotate relative to the shell 10 to open or close the corresponding air inlet. At the same time, the blades 20 are movably connected to the connecting member 31, and the connecting member 31 drives the blades 20 to rotate relative to the shell 10.

[0047] It is understandable that the active connection between the blade 20 and the connecting member 31 can be a sliding connection using a sliding structure, or a hinged structure, or other active connection structures so that the connecting member 31 can drive the blade 20 to move, thereby opening or closing the air inlet. Preferably, in this embodiment, the blade 20 and the connecting member 31 are connected in a sliding manner, which has a simple structure, high control accuracy, and can effectively reduce costs.

[0048] See also Figure 1-4 Further, in some embodiments, the air inlet end surface of the shell 10 is spaced apart with a fresh air inlet and a return air inlet; correspondingly, the blade 20 includes two groups, namely a first blade 21 and a second blade 22, the first blade 21 is rotatably arranged at the fresh air inlet, and the second blade 22 is rotatably arranged at the return air inlet, when the first blade 21 is parallel to the fresh air inlet plane, the second blade 22 is at a certain angle to the return air inlet plane, at this time the fresh air inlet is closed, and the return air inlet is opened and is at the maximum opening; or, when the second blade 22 is parallel to the return air inlet plane, the first blade 21 is at a certain angle to the fresh air inlet plane, at this time the return air inlet is closed, and the fresh air inlet is opened and is at the maximum opening. It can be understood that, in the working state, the first blade 21 and the second blade 22 move simultaneously. During the movement, the fresh air inlet and the return air inlet are both in the open state, and when the opening of any one of the inlets becomes larger, the opening of the other inlet becomes smaller; when it is necessary to draw in fresh air and return air at the same time, the displacement distance of the connecting member 31 can be controlled by the driving member 32 to achieve the ratio of the fresh air volume to the return air volume, which is not elaborated here.

[0049] See also Figure 1-3 , Figure 7 and Figure 8Further, in some embodiments, the connecting member 31 is slidably connected to the side wall of the housing 10, and the connecting member 31 is provided with a gear segment 316 along its sliding direction. The fixed end 321 of the driving member 32 is fixed to the housing 10, and the movable end 322 thereof is provided with a transmission gear, which meshes with the gear segment 316 to drive the connecting member 31 to slide relative to the housing 10.

[0050] It should be noted that the connecting member 31 is driven to move by the movable end 322 of the driving member 32. A transmission gear may be set at the movable end 322 to drive one connecting member 31, or two transmission gears may be set at intervals on the same movable end 322 to drive two connecting members 31 respectively, or two movable ends 322 may be set to drive two connecting members 31 respectively, but the present invention is not limited to this.

[0051] Preferably, the connector 31 is provided with a notch 315 at the position of the movable end 322, and the gear segment 316 is provided at the notch 315 and is provided parallel to the air inlet end face of the housing 10, and the gear segment 316 is meshed with the transmission gear of the movable end 322. It is understandable that the notch 315 can also be arranged in a staggered manner with the movable end 322, and a gear set is provided between the transmission gear of the movable end 322 and the gear segment 316, and the gear set is meshed with the transmission gear and the gear segment 316 at the same time, so that the movable end 322 drives the connector 31 to move through the gear set, thereby driving the relative movement of the first blade 21 and the second blade 22 relative to the connector 31.

[0052] Further, the connecting member 31 is arranged perpendicular to the rotation axis of the first blade 21 and the second blade 22, and the connecting member 31 is provided with a first slide groove 313 and a second slide groove 314. The first blade 21 is provided with a first sliding portion 211, which is slidably connected to the first slide groove 313; the second blade 22 is provided with a second sliding portion 221, which is slidably connected to the second slide groove 314. In the working state, the movable end 322 directly drives the connecting member 31, or the movable end 322 drives the connecting member 31 to move through the gear set. The movement of the connecting member 31 drives the first sliding portion 211 in the first slide groove 314 to move, and the connecting member 31 drives the second sliding portion 221 in the second slide groove 314 to move at the same time; the first blade 21 is driven to rotate at the fresh air inlet by the first sliding portion 211, and the second blade 22 is driven to rotate at the return air inlet by the second sliding portion 221, so as to realize the opening and closing of the first blade 21 and the second blade 22.

[0053] Preferably, the sliding trajectory of the first sliding part 211 and the sliding trajectory of the second sliding part 221 are symmetrical, thereby ensuring that when the first blade 21 is opened, the second blade 22 is in a closed state, or when the second blade 22 is opened, the first blade 21 is in a closed state, thereby realizing the switching of fresh air and return air.

[0054] Furthermore, the housing 10 includes a first housing 11 and a second housing 12, which are arranged to form an accommodation space for accommodating a plurality of blades 20 and a transmission assembly 30. The first housing 11 is slidably connected to the second housing 12, so that the housing 10 can be easily disassembled and assembled, and subsequent maintenance is convenient.

[0055] Preferably, the second shell 12 is provided with a accommodating groove, and its side wall is provided with a sliding groove 123 along the length direction. The two end portions in the length direction of the first shell 11 are slidably connected to the sliding groove 123, so that the first shell 11 and the second shell 12 are slidably connected. When the blade 20 or the transmission assembly 30 needs to be repaired, it is only necessary to pull the first shell 11 out of the second shell 12, which is convenient for maintenance and has low maintenance costs.

[0056] Further, in some embodiments, the first housing 11 is provided with a first fresh air inlet 111 and a first return air inlet 112 at intervals, and the air inlet end face of the first fresh air inlet 111 is fixedly connected to the fresh air duct interface 113, so as to facilitate the installation and connection with the fresh air duct. The second housing 12 is provided with a second fresh air inlet 121 and a second return air inlet 122 at intervals, the first fresh air inlet 111 and the second fresh air inlet 121 are arranged opposite to each other, and the first blade 21 is arranged between the first fresh air inlet 111 and the second fresh air inlet 121; the first return air inlet 112 and the second return air inlet 122 are arranged opposite to each other, and the second blade 22 is arranged between the first return air inlet 112 and the second return air inlet 122.

[0057] Further, the connecting member 31 is arranged close to the side wall of the second shell 12, and the connecting member 31 is slidably arranged between the first shell 11 and the second shell 12, and can slide up and down relative to the first shell 11 and the second shell 12. It can be understood that the connecting member 31 can also be arranged to be slidably connected to the first shell 11 at one end and slidably connected to the second shell 12 at the other end; the connecting member 31 can also be arranged to be slidably connected to the side wall of the second shell 12 only, which is not limited here.

[0058] See also Figure 4 Further, in some embodiments, the first housing 11 is provided with at least one windshield, which is fixed to the leeward side of the first housing 11 and disposed between the first fresh air inlet 111 and the first return air inlet 112, and is used to separate the fresh air flow and the return air flow, so as to prevent the fresh air flow and the return air flow from flowing in series inside the housing 10 and affecting the air flow velocity. Preferably, the windshield is also abutted against the second housing 12, and is located between the second fresh air inlet 121 and the second return air inlet 122, so as to separate the housing 10 into adjacent fresh air chambers and return air chambers.

[0059] Preferably, there are two windshields, namely, a first windshield 114 and a second windshield 115 which are arranged at intervals. The driving member 32 is fixedly arranged between the first windshield 114 and the second windshield 115, and the fixed end 321 of the driving member 32 is fixedly connected to the first housing 11. Furthermore, a plurality of elastic buckles 117 are arranged at intervals at the part of the first housing 11 between the first windshield 114 and the second windshield 115, for supporting the movable end 322; and the movable end 322 is rotatably engaged in the elastic buckle 117.

[0060] Furthermore, a windshield bottom plate 116 is also disposed at the bottom of the first shell 11 , and the windshield bottom plate 116 is used to block the airflow to prevent the airflow from overflowing through the bottom of the shell 10 .

[0061] See also Figure 5-7 , further, in some embodiments, the first blade 21 and the second blade 22 include a plurality of identical swing blades 40. Preferably, the swing blade 40 is provided with a rotating portion 41, a guide portion 42 and an abutment portion 43. In some embodiments, the two ends of the rotating portion 41 are provided with protruding rotating shafts 411, and as a match, the two side edges in the length direction of the leeward side of the first shell 11 are provided with a plurality of mounting grooves 13, and the rotating shafts 411 are inserted into the mounting grooves 13 of the first shell 11, so that the swing blade 40 can be rotated relative to the first shell 11 to realize the opening and closing of the corresponding air inlet. It can be understood that in other embodiments, the two ends of the rotating portion 41 are provided with pin holes, and the shaft pin of the first shell 11 is rotatably inserted into the pin holes, so as to realize the rotation of the swing blade 40 relative to the first shell 11.

[0062] Furthermore, the air guide portion 42 is tilted, one end of which is connected to the rotating portion 41, and the other end is connected to the abutting portion 43; thus, the swing blade 40 is like a bionic bird wing, and has a certain air guide effect. When the fresh air inlet or the return air inlet is closed, the abutting portion 43 abuts against the rotating portion 42 of the adjacent swing blade 40, so that there is no gap between the swing blades 40, and complete sealing is achieved.

[0063] It can be understood that the shapes of the first sliding part 211 and the second sliding part 221 can be set to be the same or different. They can be set at both ends of the guide part 42, or at both ends of the abutment part 43, or at both ends of the guide part 42 and the abutment part 43. They can slide relative to the connecting part 31 and drive the swing blade 40 to rotate.

[0064] Specifically, in this embodiment, the first sliding part 211 includes an adapter plate 2111 and a slider 2112, one end of the adapter plate 2111 is fixed to the end of the guide part 42 and / or the abutment part 43, and the other end of the adapter plate 2111 is connected to the slider 2112, and the slider 2112 is slidably inserted in the first slide groove 314, and can slide relative to the first slide groove 314 to drive the swing of the swing blade 40. Preferably, the adapter plate 2111 is set to a triangle, wherein one edge is fixed to the end of the guide part 42 and the abutment part 43, and the slider 2112 is fixed at the top corner of the adapter plate 2111 opposite to the edge. In this way, the fixing area of ​​the first sliding part 211 and the swing blade 40 is increased, which can effectively increase the stability of the first sliding part 211 and prevent the first sliding part 211 from falling off the swing blade 40. The first sliding part 211 and the second sliding part 221 have the same shape, which will not be described in detail here.

[0065] See also Figure 1-8 As a preferred implementation, in this embodiment, there are two connecting members 31, namely a first connecting member 311 and a second connecting member 312, and the first connecting member 311 and the second connecting member 312 are respectively slidably connected to opposite sides of the housing 10. At the same time, the driving member 32 is provided with a fixed end 321 and two movable ends 322, and the two movable ends 322 are coaxially arranged on both sides of the fixed end 321, for synchronously driving the first connecting member 311 and the second connecting member 312.

[0066] In this embodiment, the first connecting member 311 and the second connecting member 312 are both provided with a first slide groove 313 and a second slide groove 314. For coordination, both ends of the first blade 21 are provided with a first sliding portion 211, which is respectively slidably connected to the first slide grooves 313 on both sides; both ends of the second blade 22 are provided with a second sliding portion 221, which is respectively slidably connected to the second slide grooves 314 on both sides. Preferably, the sliding tracks of the first sliding portion 211 and the second sliding portion 221 located on the same connecting member are symmetrical, so that when the first connecting member 311 and the second connecting member 312 move synchronously, the rotation directions of the first blade 21 and the second blade 22 are opposite; it can be achieved that when the first blade 21 is opened, the second blade 22 is closed; when the first blade 21 is closed, the second blade 22 is opened.

[0067] An embodiment of the present application also provides an air conditioner, including an air inlet switching structure.

[0068] Compared with the prior art, the air inlet switching structure described in the utility model has the following beneficial effects:

[0069] (1) Through the simple mechanical structure linkage design, other complex transmission structures and control components are reduced, making the overall structure simpler, the cost lower, and the performance more stable;

[0070] (2) A connecting member is directly arranged to slide relative to multiple blades. The sliding of the connecting member relative to the housing drives all blades to rotate in a directional manner, thereby realizing the linkage of upper and lower air intakes and facilitating the mutual switching of fresh air and return air;

[0071] (3) By setting the swing blade to a bionic wing design, it not only has a certain diversion effect, but also enables the front and rear swing blades to be in a sealed state when the swing blade moves to a certain position;

[0072] (4) The components are detachable to facilitate assembly and repair, and subsequent maintenance is simple.

[0073] It should be noted that the directions or positional relationships indicated by terms such as “above”, “below”, “bottom”, “front” and “back” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0074] Moreover, the above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, and the utility model is also intended to include these modifications and modifications.

Claims

1. An air inlet switching structure, characterized in that: include: The housing has an air inlet end surface with at least two air inlets spaced apart from each other; The transmission assembly comprises a driving member and at least one connecting member; the connecting member is slidably connected to the housing, and the movable end of the driving member is transmission-connected to the connecting member to drive the connecting member to slide relative to the housing; Each air inlet is correspondingly provided with a group of blades, and the blades are rotatably connected to the housing to open or close the air inlet; Furthermore, the blade is movably connected to the connecting member, and the connecting member drives the blade to rotate relative to the shell.

2. The air inlet switching structure according to claim 1, characterized in that: The air inlet end surface of the shell is provided with a fresh air inlet and a return air inlet at intervals; The blades include two groups, namely a first blade and a second blade. The first blade is rotatably arranged at the fresh air inlet, and the second blade is rotatably arranged at the return air inlet. When the first blade is parallel to the fresh air inlet plane, the second blade is at a certain angle to the return air inlet plane; or, when the second blade is parallel to the return air inlet plane, the first blade is at a certain angle to the fresh air inlet plane. In a working state, the rotation directions of the first blade and the second blade are opposite.

3. The air inlet switching structure according to claim 2, characterized in that: The connecting member is slidably connected to the side wall of the housing, and the connecting member is provided with a gear segment along its sliding direction; The fixed end of the driving member is fixedly connected to the housing; the movable end of the driving member is provided with a transmission gear which meshes with the gear segment to drive the connecting member to slide relative to the housing.

4. The air inlet switching structure according to claim 3, characterized in that: The rotation axes of the first blade and the second blade are arranged perpendicular to the connecting member; The connecting member is provided with a first sliding groove, and the end of the first blade is provided with a first sliding portion, and the first sliding portion is slidably connected to the first sliding groove; The connecting member is further provided with a second slide groove, and the end of the second blade is provided with a second sliding portion, and the second sliding portion is slidably connected to the second slide groove; The sliding track of the first sliding part is symmetrical to the sliding track of the second sliding part.

5. The air inlet switching structure according to claim 4, characterized in that: The first blade and the second blade each include a plurality of swing blades; The swing blade is provided with a rotating part, a flow guiding part and an abutting part; The end of the guide portion and / or the abutting portion is fixedly connected to the first sliding portion; or the end of the guide portion and / or the abutting portion is fixedly connected to the second sliding portion; The two ends of the rotating part are provided with protruding rotating shafts, which are rotatably connected to the housing through the rotating shafts; or, the two ends of the rotating part are provided with pin holes, and the housing is correspondingly provided with shaft pins, and the shaft pins are rotatably inserted into the pin holes; The guide portion is arranged obliquely, one end of which is connected to the rotating portion, and the other end of which is connected to the abutting portion; When the fresh air inlet or the return air inlet is in a closed state, the abutting portion abuts against the rotating portion of the adjacent swing blade.

6. The air inlet switching structure according to claim 5, characterized in that: The first sliding part is provided with an adapter plate and a slider; the adapter plate is triangular, and one edge of it is fixed to the end of the guide part and the abutment part; one end of the slider is fixed to the top angle of the adapter plate opposite to the edge, and the other end of the slider is slidably arranged in the first sliding groove.

7. The air inlet switching structure according to claim 6, characterized in that: The transmission assembly includes a driving member and two connecting members, wherein the two connecting members are arranged perpendicular to the rotation axis of the swing blade and are respectively slidably connected to the two side walls of the housing; The driving member is provided with a fixed end and two movable ends. The two movable ends are coaxially arranged on both sides of the fixed end and are respectively transmission-connected with one of the connecting members to drive the corresponding connecting member to slide relative to the shell.

8. The air inlet switching structure according to claim 7, characterized in that: The housing is provided with a positioning portion, the positioning portion is provided between the fresh air inlet and the return air inlet, the positioning portion is provided with two elastic buckles at intervals, the fixed end of the driving member is fixedly connected to the positioning portion and is provided between the two elastic buckles; the movable end of the driving member is rotatably clamped to the elastic buckle; The connecting member is provided with a notch at a position corresponding to the movable end of the driving member, and the gear segment is arranged at the notch and parallel to the air inlet end surface of the shell, and meshes with the movable end of the driving member.

9. The air inlet switching structure according to claim 5, characterized in that: The shell includes a first shell and a second shell, the first shell is slidably connected to the second shell; the first shell is provided with a first fresh air inlet and a first return air inlet, and the second shell is provided with a second fresh air inlet and a second return air inlet; the first blade is provided between the first fresh air inlet and the second fresh air inlet, and the second blade is provided between the first return air inlet and the second return air inlet.

10. An air conditioner, characterized in that: include: The air inlet switching structure according to any one of claims 1 to 9.

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