Air conditioner with air inlet and outlet shared air port and control method of air conditioner

Abstract

The invention provides an air conditioner with an air inlet and outlet shared air port and a control method thereof.The air conditioner comprises an air conditioner shell, the air port is formed in the air conditioner shell and can serve as an air outlet and an air inlet, and the air port is provided with an air port protection structure; the air port protection structure comprises a switching protection part and a driving part, and a filtering area, an air outlet area and a shielding and closing area are formed on the switching protection part. The driving part is in driving connection with the switching protection part so as to drive one of the filtering area, the air outlet area and the shielding closed area of the switching protection part to correspond to the air opening. The filtering area, the air outlet area and the shielding and closing area are arranged on the switching protection part at the same time, so that the driving part can be controlled to drive the switching protection part to move and switch different areas of the switching protection part to correspond to the air opening according to the actual state requirement of the air opening; and therefore, the state requirements of the air conditioner on the air port in different operation modes are met.

Description

Technical Field

[0001] The present invention belongs to the technical field of air conditioning, and in particular relates to an air conditioner with a common air inlet and outlet and a control method thereof. Background Art

[0002] There are two existing technologies for protecting the air vents of upper and lower air-discharging air-conditioning cabinets (i.e. cabinet-type air conditioners): one is to design a fixed grille. In order to reduce the loss of air volume, the grille opening interval cannot be too small. Therefore, this solution can only prevent relatively large pests from entering the air conditioner, while smaller pests can still enter the air conditioner, which poses certain safety hazards; the other is to design a moving baffle. When the air conditioner is in standby or upper air-discharging mode, the baffle is closed; when the air conditioner starts the lower air-discharging mode, the baffle is opened for air discharge. This solution can effectively prevent insects and rats from entering the air duct.

[0003] In the new dual axial fan up-and-down air-conditioning technology, when the air conditioner is in the up-and-down air-conditioning mode, the up-and-down air outlet is the air outlet and the down-and-down air outlet is the air inlet; when the air conditioner is in the down-and-down air-conditioning mode, the down-and-down air outlet is the air outlet and the up-and-down air outlet is the air inlet. In this up-and-down air-conditioning technology, the down-and-down air outlet needs to be opened regardless of whether it is in the up-and-down air-conditioning mode. The traditional down-and-down air outlet protection technology obviously cannot meet the safety requirements. Summary of the invention

[0004] Therefore, the present invention provides an air conditioner with a common inlet and outlet vent and a control method thereof, which can overcome the technical problem in the prior art that the air conditioner vent protection structure cannot meet the usage mode requirements of the air conditioner with a common inlet and outlet vent.

[0005] In order to solve the above-mentioned problems, the present invention provides an air conditioner with a common air inlet and outlet, comprising an air conditioning shell, on which an air outlet is constructed, and the air outlet can be used as both an air outlet and an air inlet, and the air outlet is provided with an air outlet protection structure, and the air outlet protection structure includes a switching protective member and a driving member, and a filtering area, an air outlet area and a shielding and closing area are formed on the switching protective member, and the driving member is drivingly connected to the switching protective member to drive one of the filtering area, air outlet area and shielding and closing area of ​​the switching protective member to correspond to the air outlet.

[0006] In some embodiments, the switching protective member includes two connecting belts arranged in parallel and spaced apart, one end of the two connecting belts is connected to a baffle, the baffle forms the shielding and enclosed area, the other end of the two connecting belts is connected to a filter net, the filter net forms the filtering area, and the spacing area between the two connecting belts forms the air outlet area.

[0007] In some embodiments, the driving component includes a rotating shaft and a driving motor that drives the rotating shaft to rotate forward and reverse. The rotating shaft is horizontally arranged in the top area of ​​the air outlet. The rotating shaft is provided with a first gear and a second gear at intervals along its axial direction. One side of the connecting belt has teeth. The two connecting belts form a wrap angle with the first gear and the second gear respectively and the teeth are meshed, so that the baffle and the filter are respectively located on opposite sides of the rotating shaft.

[0008] In some embodiments, the air conditioner further includes a guide rail, with reference to the orientation of the air conditioner in use, one guide rail is provided on each of the left and right sides of the air outlet, and guide rail grooves extending up and down are formed on the sides of the guide rails opposite to each other, the rotating shaft is mounted on the top of the two guide rails, and the first gear and the second gear are respectively located in the guide rail grooves on both sides in a one-to-one correspondence; and / or, the drive motor is fixed on one of the two guide rails; and / or, the connecting belt is made of a flexible material.

[0009] In some embodiments, a roller is provided in the guide rail groove, and the roller is spaced apart from the first gear and the second gear and can be pressed on the side of the connecting belt facing away from the rotating shaft so that the connecting belt is clamped between the first gear and the roller or between the second gear and the roller; and / or, the length of the guide rail groove is L, the lengths of the shielding and enclosed area and the filtering area are equal and are both L1, and the length of the air outlet area is 2L1, L>3L1.

[0010] In some embodiments, two rollers are disposed in the same guide rail groove, and the two rollers are respectively located on a side of the rotating shaft close to the filtering area and a side of the rotating shaft close to the shielding and enclosing area.

[0011] In some embodiments, the guide rail is disposed on the inner side of the air outlet; and / or the guide rail is a T-shaped guide rail.

[0012] In some embodiments, the air conditioner is a cabinet-type air conditioner with up-and-down air outlets, and the air outlet is a lower air outlet of the cabinet-type air conditioner with up-and-down air outlets.

[0013] The present invention also provides a control method for the air conditioner having a common air inlet and outlet as described above, comprising the following steps:

[0014] Obtain work orders;

[0015] When the working instruction is to discharge air from the air outlet, the air outlet area of ​​the switching protection element is controlled to move to the air outlet; or,

[0016] When the working instruction is air inlet, controlling the filter area of ​​the switch protection element to move to the air outlet; or,

[0017] When the working instruction is to close the air outlet, the shielding and closing area of ​​the switching protective element is controlled to move to the air outlet.

[0018] The present invention also provides a control method for the air conditioner having a common air inlet and outlet as described above, comprising the following steps:

[0019] Get the working mode of the air conditioner;

[0020] When the working mode is the downward air outlet mode, the air outlet area of ​​the switching protection element is controlled to move to the air outlet; or,

[0021] When the working mode is the upper air outlet mode, the filter area of ​​the switch protection element is controlled to move to the air outlet; or,

[0022] When the working mode is the shutdown mode or the standby mode, the shielding and enclosing area of ​​the switching protection element is controlled to move to the air outlet.

[0023] The present invention provides an air conditioner with a common air inlet and outlet and a control method thereof, which has the following features:

[0024] Beneficial effects:

[0025] By simultaneously setting a filtering area, an air outlet area and a shielding and closing area on the switching protective element, the driving component can be controlled to drive the switching protective element to move and switch its different areas to correspond to the air outlet according to the actual state requirements of the air outlet, thereby satisfying the state requirements of the air conditioner for the air outlet in different operating modes. Specifically, when the air outlet serves as an air outlet, the air outlet area corresponds to the air outlet to ensure unobstructed air outlet and maximize the air output; when the air outlet serves as an air inlet, the filtering area corresponds to the air outlet to ensure filtering of the air entering the air conditioner, ensure the cleanliness of the heat exchanger in the air conditioner, and prevent external rodents and insects from entering the air conditioner; when the air conditioner is on standby or turned off, the air outlet is sealed to prevent dust and water and prevent external rodents and insects from entering the air conditioner. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. The drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0027] Figure 1 1 is a front view structural schematic diagram of a switching protective member of an air conditioner with a common air inlet and outlet port according to an embodiment of the present invention;

[0028] Figure 2yes Figure 1 A left side view of the switch guard in FIG.

[0029] Figure 3 yes Figure 1 A schematic diagram of the three-dimensional structure of the switching protective member;

[0030] Figure 4 It is a schematic diagram of a state in which the shielding and enclosing area of ​​the switching protective member in the air conditioner with a common air inlet and outlet air outlet according to an embodiment of the present invention is at the air outlet;

[0031] Figure 5 It is a schematic diagram of a state in which the air outlet area of ​​the switching protective member is at the air outlet in an air conditioner with a common air inlet and outlet according to an embodiment of the present invention;

[0032] Figure 6 It is a schematic diagram of a state in which the filter area of ​​the switching protective element is located at the air outlet in an air conditioner with a common air inlet and outlet according to an embodiment of the present invention;

[0033] Figure 7 It is a three-dimensional structural schematic diagram of the switch protection member, the guide rail and the driving component in the air conditioner with the common air inlet and outlet according to the embodiment of the present invention in the assembled state;

[0034] Figure 8 yes Figure 7 A front view of

[0035] Fig. 9 yes Figure 8 A top view of

[0036] Fig.10 yes Fig. 9 Schematic diagram of the local structure;

[0037] Fig.11 yes Figure 7 A front view of the guide rail in FIG.

[0038] Fig.12 yes Figure 7 Schematic diagram of the three-dimensional structure of the rotating shaft.

[0039] The accompanying drawings are marked as follows:

[0040] 1. Air conditioner housing; 11. Air outlet; 2. Switching protective member; 21. Filter area; 22. Air outlet area; 23. Shielding and enclosed area; 24. Connecting belt; 241. Tooth; 251. Baffle; 252. Filter; 31. Rotating shaft; 311. First gear; 312. Second gear; 32. Driving motor; 4. Guide rail; 41. Guide rail groove; 5. Roller. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0043] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90° or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0044] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0045] See also Figure 1 and Fig.12As shown, according to an embodiment of the present invention, there is provided an air conditioner with a common air inlet and outlet, comprising an air conditioning shell 1, on which an air outlet 11 is constructed, and the air outlet 11 can be used as both an air outlet and an air inlet, and the air outlet 11 is provided with an air outlet protection structure (not labeled in the figure), and the air outlet protection structure includes a switching protective member 2 and a driving member (not labeled in the figure), and a filtering area 21, an air outlet area 22 and a shielding and closing area 23 are formed on the switching protective member 2, and the driving member is drivingly connected to the switching protective member 2 to drive one of the filtering area 21, the air outlet area 22 and the shielding and closing area 23 of the switching protective member 2 to correspond to the air outlet 11, that is, the corresponding area is in the flow space of the air outlet 11 to realize different working states of the air outlet 11 (as an air inlet or an air outlet or blocked).

[0046] In this technical solution, by simultaneously providing a filter area 21, an air outlet area 22 and a shielding and closing area 23 on the switching protective member 2, the driving component can be controlled to drive the switching protective member 2 to move and switch its different areas to correspond to the air outlet 11 according to the actual state requirements of the air outlet 11, thereby satisfying the state requirements of the air conditioner for the air outlet 11 in different operating modes. Specifically, when the air outlet 11 is used as an air outlet, the air outlet area 22 corresponds to the air outlet 11 to ensure that the air outlet is unobstructed and the air outlet volume is maximized; when the air outlet 11 is used as an air inlet, the filter area 21 corresponds to the air outlet 11 to ensure filtering of the air entering the air conditioner, ensuring the cleanliness of the heat exchanger in the air conditioner and preventing external rodents and insects from entering the air conditioner; when the air conditioner is on standby or turned off, the air outlet 11 is sealed to prevent dust and water and prevent external rodents and insects from entering the air conditioner.

[0047] See also Figures 1 to 3 As shown, in a specific embodiment, the switching protective member 2 includes two connecting belts 24 arranged in parallel and spaced apart, one end of the two connecting belts 24 is connected to a baffle 251, and the baffle 251 forms the shielding closed area 23, the other end of the two connecting belts 24 is connected to a filter net 252, and the filter net 252 forms the filtering area 21, and the spacing area between the two connecting belts 24 forms the air outlet area 22.

[0048] In this technical solution, baffles 251 and filter nets 252 are respectively arranged at both ends of the length of the two connecting belts 24 to form a filtering area 21, an air outlet area 22 and a shielding and closed area 23 arranged in sequence in the length direction of the connecting belt 24. Different air outlet states can be achieved by driving the relative position of the whole and the air outlet 11 to change, and the structure is simple.

[0049] See also Figures 7 to 9As shown, the driving component includes a rotating shaft 31 and a driving motor 32 for driving the rotating shaft 31 to rotate forward and reversely. The rotating shaft 31 is horizontally arranged in the top area of ​​the air outlet 11. The rotating shaft 31 is provided with a first gear 311 and a second gear 312 at intervals along its axial direction. One side of the connecting belt 24 (i.e., the side facing the rotating shaft 31) has teeth 241. The two connecting belts 24 form an angle with the first gear 311 and the second gear 312 respectively and the teeth are meshed, so that the baffle 251 and the filter screen 252 are respectively located on the opposite sides of the rotating shaft 31.

[0050] In this technical solution, a rotating shaft 31 having a first gear 311 and a second gear 312 is engaged with a connecting belt 24 having teeth 241 on both sides. When the rotating shaft 31 is driven to rotate by a driving motor 32, the position of different areas of the switching protective member 2 and the air outlet 11 can be adjusted and switched, and the control is simple.

[0051] In a specific embodiment, the aforementioned connecting belt 24 has a certain flexibility, that is, the material of the connecting belt 24 is a flexible material, for example, the aforementioned connecting belt 24 is made of a rubber strip, so that the sections located on both sides of the aforementioned first gear 311 or the second gear 312 can remain straight up and down under the self-weight of the baffle 251 and the filter net 252, thereby ensuring that the baffle 251 and the filter net 252 are accurately corresponding to the position of the air outlet 11 when they are at the air outlet 11 and improving the smoothness of the position switching of the switching protective member 2.

[0052] In some embodiments, the air conditioner further includes a guide rail 4, with reference to the orientation of the air conditioner in use, one guide rail 4 is provided on each of the left and right sides of the air outlet 11, and guide rail grooves 41 extending up and down are formed on the opposite sides of the guide rails 4, the rotating shaft 31 is mounted on the top of the two guide rails 4, and the first gear 311 and the second gear 312 are respectively located in the guide rail grooves 41 on both sides in a one-to-one correspondence, and it can be understood that, correspondingly, the switching guard 2 is also correspondingly located in the guide rail groove 41, so that the aforementioned guide rail groove 41 will hide the first gear 311, the second gear 312 and the switching guard 2 therein, preventing these moving pairs from contacting with the surrounding parts and cables, etc., which may cause failures; in another preferred embodiment, the drive motor 32 is fixed on one of the two guide rails 4, and the output shaft of the drive motor 32 is directly connected to one end of the rotating shaft 31 through a spline or other connecting structure, and the outer casing of the drive motor 32 is fixedly connected to the guide rail 4, so that the compactness of the air outlet protection structure can be improved.

[0053] See Fig. 9 and Fig.10As shown, in some embodiments, a roller 5 is provided in the guide rail groove 41, and the roller 5 is spaced apart from the first gear 311 and the second gear 312 and can be pressed on the side of the connecting belt 24 away from the rotating shaft 31 so that the connecting belt 24 is clamped between the first gear 311 and the roller 5 or between the second gear 312 and the roller 5.

[0054] In this technical solution, a roller 5 is arranged in the guide groove 41 to form a pressure on the connecting belt 24, thereby ensuring the reliability of the engagement between the teeth 241 on the connecting belt 24 and the first gear 311 and the second gear 312, preventing the connecting belt 24 from being displaced during movement, and thereby ensuring that the rotating shaft 31 switches the position of the switching protective member 2 accurately and reliably.

[0055] The length of the guide rail groove 41 is L, the lengths of the shielding and enclosed area 23 and the filtering area 21 are equal and both are L1, the length of the air outlet area 22 is 2L1, L>3L1, that is, L=3L1+C, C is the structural margin, and its value is greater than 0. In this way, it can be ensured that during the position switching process of the switching protective member 2, the filter net 252 and the baffle 251 can be at least partially in the guide rail groove 41, thereby ensuring smooth and stable position switching.

[0056] See Fig.10 As shown, two rollers 5 are disposed in the same guide rail groove 41 , and the two rollers 5 are respectively located on a side of the rotating shaft 31 close to the filtering area 21 and a side of the rotating shaft 31 close to the shielding and closing area 23 .

[0057] In this technical solution, a roller 5 is arranged on the opposite sides of the first gear 311 and the second gear 312, so that the two oppositely arranged rollers 5 can ensure the reliable formation of the wrapping angle between the connecting belt 24 and the corresponding gear, thereby ensuring the reliable driving of the connecting belt 24 by the rotating shaft 31.

[0058] The guide rail 4 is arranged on the inner side of the air outlet 11 to ensure the appearance consistency of the air conditioner and enhance the appearance aesthetics; in a specific embodiment, the guide rail 4 is a T-shaped guide rail. By designing the guide rail 4 as a T-shape, the two rollers 5 in each of the guide rail grooves 41 can be arranged at a wider position of the T-shape, thereby making the structural design more reasonable.

[0059] The air conditioner may be a cabinet-type air conditioner with upper and lower air outlets, and the air outlet 11 is a lower air outlet of the cabinet-type air conditioner with upper and lower air outlets.

[0060] According to an embodiment of the present invention, there is also provided a control method for an air conditioner having a common air inlet and outlet as described above, comprising the following steps:

[0061] Obtain work orders;

[0062] When the working instruction is to discharge air from the air outlet, the air outlet area 22 of the switching protection member 2 is controlled to move to the air outlet 11, such as Figure 5 as shown; or,

[0063] When the working instruction is air inlet, the filter area 21 of the switching protection element 2 is controlled to move to the air outlet 11, such as Figure 6 as shown; or,

[0064] When the working instruction is to close the air outlet, the shielding and closing area 23 of the switching protection member 2 is controlled to move to the air outlet 11, such as Figure 4 shown.

[0065] like Figure 8 As shown, in this state, the air outlet area 22 corresponds to the air outlet 11, that is, the air outlet 11 is used as the air inlet at this time. For the sake of convenience, this state is used as the control starting state of the present application. When the working instruction is air inlet, the drive motor 32 does not run, and the filter area 21 of the switching protective member 2 remains in the current position. When the working instruction is air outlet, the drive motor 32 is controlled to rotate counterclockwise at a first angle, so that the air outlet area 22 rises to a height corresponding to the air outlet 11 and the filter area 21 is lowered below the lower edge of the air outlet 11, thereby achieving unobstructed air outlet with a large air outlet volume; still based on the aforementioned control starting state, when the working instruction is to close the air outlet (for example, when on standby or shut down), the drive motor 32 is controlled to rotate counterclockwise at a second angle, so that the shielding closed area 23 rises to a height corresponding to the air outlet 11, thereby blocking the air outlet 11, achieving the purpose of dustproof, waterproof and anti-rodent invasion in the standby or shut down state.

[0066] According to an embodiment of the present invention, there is also provided a control method for an air conditioner having a common air inlet and outlet as described above, comprising the following steps:

[0067] Get the working mode of the air conditioner;

[0068] When the working mode is the down-flow mode, the air outlet area 22 of the switch protection member 2 is controlled to move to the air outlet 11, such as Figure 5 as shown; or,

[0069] When the working mode is the upper air outlet mode, the filter area 21 of the switch protection member 2 is controlled to move to the air outlet 11, such as Figure 6 as shown; or,

[0070] When the working mode is shutdown or standby mode, the shielding closed area 23 of the switching protection member 2 is controlled to move to the air outlet 11, such as Figure 4 The specific control implementation method is shown in the previous text and will not be repeated here.

[0071] It is easy for those skilled in the art to understand that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0072] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. An air conditioner with a common air inlet and outlet, characterized in that: The invention comprises an air conditioner housing (1), wherein the air conditioner housing (1) is provided with an air outlet (11), wherein the air outlet (11) can be used as both an air outlet and an air inlet, wherein the air outlet (11) is provided with an air outlet protection structure, wherein the air outlet protection structure comprises a switching protection member (2) and a driving member, wherein the switching protection member (2) is provided with a filtering area (21), an air outlet area (22) and a shielding and sealing area (23), and wherein the driving member is drivingly connected to the switching protection member (2) so as to drive one of the filtering area (21), the air outlet area (22) and the shielding and sealing area (23) of the switching protection member (2) to correspond to the air outlet (11).

2. The air conditioner according to claim 1, characterized in that: The switching protective member (2) comprises two connecting belts (24) arranged in parallel and at intervals, one end of the two connecting belts (24) is connected to a baffle (251), the baffle (251) forms the shielding and enclosed area (23), the other end of the two connecting belts (24) is connected to a filter net (252), the filter net (252) forms the filtering area (21), and the interval area between the two connecting belts (24) forms the air outlet area (22).

3. The air conditioner according to claim 2, characterized in that: The driving component comprises a rotating shaft (31) and a driving motor (32) for driving the rotating shaft (31) to rotate forward and reversely. The rotating shaft (31) is horizontally arranged at the top area of ​​the air outlet (11). A first gear (311) and a second gear (312) are arranged on the rotating shaft (31) at intervals along its axial direction. One side of the connecting belt (24) has teeth (241). The two connecting belts (24) respectively form an angle with the first gear (311) and the second gear (312) and the teeth are meshed, so that the baffle (251) and the filter screen (252) are respectively located on opposite sides of the rotating shaft (31).

4. The air conditioner according to claim 3, characterized in that: It also includes a guide rail (4), with the orientation of the air conditioner in use as a reference, one guide rail (4) is provided on each of the left and right sides of the air outlet (11), and guide rail grooves (41) extending up and down are formed on the sides of the guide rails (4) opposite to each other, the rotating shaft (31) is mounted on the top of the two guide rails (4), and the first gear (311) and the second gear (312) are respectively located in the guide rail grooves (41) on both sides in a one-to-one correspondence; and / or, the driving motor (32) is fixed on one of the two guide rails (4); and / or, the material of the connecting belt (24) is a flexible material.

5. The air conditioner according to claim 4, characterized in that: A roller (5) is provided in the guide rail groove (41), and the roller (5) is spaced apart from the first gear (311) and the second gear (312) and can be pressed on the side of the connecting belt (24) away from the rotating shaft (31) so that the connecting belt (24) is clamped between the first gear (311) and the roller (5) or between the second gear (312) and the roller (5); and / or, the length of the guide rail groove (41) is L, the lengths of the shielding and enclosing area (23) and the filtering area (21) are equal and both are L1, and the length of the air outlet area (22) is 2L1, and L>3L1.

6. The air conditioner according to claim 5, characterized in that: Two rollers (5) are arranged in the same guide rail groove (41), and the two rollers (5) are respectively located on a side of the rotating shaft (31) close to the filtering area (21) and a side of the rotating shaft (31) close to the shielding and sealing area (23).

7. The air conditioner according to claim 4, characterized in that: The guide rail (4) is arranged on the inner side of the air outlet (11); and / or the guide rail (4) is a T-shaped guide rail.

8. The air conditioner according to any one of claims 1 to 7, characterized in that: The air conditioner is a cabinet-type air conditioner with upper and lower air outlets, and the air outlet (11) is the lower air outlet of the cabinet-type air conditioner with upper and lower air outlets.

9. A control method for an air conditioner having a common inlet and outlet air vent according to any one of claims 1 to 8, characterized in that: The steps include: Obtain work orders; When the working instruction is to discharge air from the air outlet, the air outlet area (22) of the switching protection element (2) is controlled to move to the air outlet (11); or, When the working instruction is air inlet, the filter area (21) of the switch protection element (2) is controlled to move to the air outlet (11); or, When the working instruction is to close the air outlet, the shielding and closing area (23) of the switching protection element (2) is controlled to move to the air outlet (11).

10. A control method for an air conditioner having a common air inlet and outlet as claimed in claim 8, characterized in that: The steps include: Get the working mode of the air conditioner; When the working mode is the downward air outlet mode, the air outlet area (22) of the switching protection element (2) is controlled to move to the air outlet (11); or, When the working mode is the upper air outlet mode, the filter area (21) of the switch protection element (2) is controlled to move to the air outlet (11); or, When the working mode is the shutdown mode or the standby mode, the shielding and enclosing area (23) of the switching protection element (2) is controlled to move to the air outlet (11).

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