Fresh air device and air conditioner indoor unit having the same

Abstract

The present invention provides a fresh air device and an air conditioner indoor unit having the same, comprising: a fresh air casing, the fresh air casing is provided with an indoor air inlet, a fresh air outlet and a switching port, the indoor air inlet and the fresh air outlet are both used to communicate with indoor air, and the switching port is used to communicate with outdoor air; a fresh air induction structure and an exhaust structure, the fresh air induction structure and the exhaust structure are arranged in the fresh air casing at intervals, the indoor air inlet is connected to the exhaust cavity of the exhaust structure, and the fresh air outlet is connected to the fresh air cavity of the fresh air induction structure; wherein the switching port can be selectively connected to the fresh air cavity or the exhaust cavity, so that the air flowing from the indoor air inlet into the exhaust cavity flows out through the switching port, or the fresh air introduced by the switching port flows out through the fresh air cavity and then flows out from the fresh air outlet. The technical solution provided by the present invention can solve the technical problem that the fresh air device in the prior art cannot realize the exhaust function.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioner indoor units, and in particular to a fresh air device and an air conditioner indoor unit having the same. Background Art

[0002] At present, with the improvement of people's quality of life, users' requirements for air conditioners are not limited to cooling and heating, but also require the freshness of indoor air. Therefore, air conditioners in the prior art generally introduce fresh air function to improve user comfort and improve the user's indoor environment.

[0003] However, the fresh air device in the prior art is generally only used to introduce fresh air into the room, has a single function, and cannot realize the exhaust function. If it is necessary to exhaust the indoor dirty air, it is often necessary to add another exhaust device. Summary of the invention

[0004] The main purpose of the present invention is to provide a fresh air device and an air conditioner indoor unit having the same, so as to solve the technical problem that the fresh air device in the prior art cannot realize the exhaust function.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a fresh air device is provided, comprising: a fresh air casing, the fresh air casing is provided with an indoor air inlet, a fresh air outlet and a switching port, the indoor air inlet and the fresh air outlet are both used to communicate with indoor air, and the switching port is used to communicate with outdoor air; a fresh air induced air structure and an exhaust air structure, the fresh air induced air structure and the exhaust air structure are arranged in the fresh air casing at intervals, the indoor air inlet is connected to the exhaust air cavity of the exhaust air structure, and the fresh air outlet is connected to the fresh air cavity of the fresh air induced air structure; wherein the switching port can be selectively connected to the fresh air cavity or the exhaust cavity, so that the air flowing into the exhaust cavity from the indoor air inlet flows out through the switching port, or the fresh air introduced by the switching port flows out from the fresh air outlet after passing through the fresh air cavity.

[0006] Furthermore, a switching air duct is also provided in the fresh air casing, and the switching air duct is provided between the fresh air inlet structure and the exhaust structure. A switching port is formed at one end of the switching air duct, and a connecting opening portion is provided at the other end of the switching air duct. The connecting opening portion has a first opening state connected to the exhaust chamber and a second opening state connected to the fresh air chamber, so that the switching port can be selectively connected to the fresh air chamber or the exhaust chamber through the connecting opening portion.

[0007] Furthermore, the fresh air device also includes: a switching mechanism, a switching part of the switching mechanism can be movably arranged at the connecting opening part, so that the connecting opening part is in a first open state or a second open state under the switching action of the switching mechanism.

[0008] Furthermore, the connecting opening portion includes a first opening and a second opening that are connected to each other, the first opening is arranged toward the exhaust chamber, and the second opening is arranged toward the fresh air chamber; the switching mechanism includes: a first switching plate and a second switching plate, the first switching plate is movably arranged at the first opening, and the second switching plate is movably arranged at the second opening; when the connecting opening is in the first open state, the first switching plate moves to a position to avoid the first opening, and the second switching plate moves to a position to cover the second opening; when the connecting opening is in the second open state, the first switching plate moves to a position to cover the first opening, and the second switching plate moves to a position to avoid the second opening.

[0009] Further, the first switching plate is movably disposed at the first opening; and / or the second switching plate is movably disposed at the second opening.

[0010] Furthermore, the switching mechanism also includes a driving part, which is drivingly connected to the switching part, and the driving part includes a gear rack structure that meshes with each other.

[0011] Furthermore, the switching mechanism includes: a driving gear; a first driving rack meshing with the driving gear, the first driving rack being connected to the first switching plate so that the driving gear drives the first switching plate to move through the first driving rack; a second driving rack meshing with the driving gear, the first driving rack and the second driving rack being respectively located on both sides of the driving gear, and the second driving rack being connected to the second switching plate so that the driving gear drives the second switching plate to move through the second driving rack.

[0012] Furthermore, a connecting shell is provided in the fresh air machine casing, and the connecting shell is used to enclose a switching air duct, and a connecting opening is arranged on the connecting shell; a first socket is provided on the side wall of the connecting shell, and the first socket is adapted to the shape of the first switching board, so that the first switching board can be inserted in the first socket and cover the first opening; and / or, a second socket is provided on the side wall of the connecting shell, and the second socket is adapted to the shape of the second switching board, so that the second switching board can be inserted in the second socket and cover the second opening.

[0013] Furthermore, a fresh air inlet is also provided on the fresh air casing, and the fresh air inlet is used to introduce outdoor fresh air. The fresh air inlet is connected to the fresh air cavity so that the outdoor fresh air introduced by the fresh air inlet flows into the fresh air cavity.

[0014] Furthermore, the fresh air outlet is arranged on one side of the fresh air casing, and the indoor air inlet and the switching port are both arranged on the other side of the fresh air casing; and / or, the indoor air inlet is arranged above the switching port.

[0015] Furthermore, a fresh air inlet is also provided on the fresh air casing, and the fresh air inlet is used to introduce outdoor fresh air. The fresh air inlet is connected to the fresh air cavity so that the outdoor fresh air introduced by the fresh air inlet can flow into the fresh air cavity; the fresh air inlet, the indoor air inlet and the switching port are all located on the same side of the fresh air casing, the indoor air inlet is located above the fresh air inlet, and the switching port is arranged between the indoor air inlet and the fresh air inlet.

[0016] Furthermore, the fresh air casing includes a motor mounting plate, a volute and a sealing cover, the volute has a first fan blade mounting opening and a second fan blade mounting opening that are spaced apart, the motor mounting plate and the sealing cover are respectively installed on both sides of the volute to respectively form an exhaust chamber and a fresh air chamber with the first fan blade mounting opening and the second fan blade mounting opening.

[0017] Furthermore, the fresh air device is used to be installed in the indoor unit casing of the air conditioner indoor unit, the sealing cover is arranged opposite to the rear panel of the indoor unit casing, and the motor mounting plate is arranged opposite to the front panel of the indoor unit casing; the fresh air outlet is arranged on the motor mounting plate, and the indoor air inlet, the switching port and the fresh air inlet are all arranged on the sealing cover.

[0018] Furthermore, a fresh air outlet is arranged on the front panel of the indoor unit shell, and the fresh air device is located on the rear side of the indoor unit shell. The fresh air device also includes: an induced draft shell, which extends from the rear panel of the indoor unit shell to the front panel of the indoor unit shell, one end of the induced draft shell is connected to the fresh air outlet, and the other end of the induced draft shell is arranged toward the fresh air outlet.

[0019] According to another aspect of the present invention, an air-conditioning indoor unit is provided. The air-conditioning indoor unit includes a fresh air device, and the fresh air device is the fresh air device provided above.

[0020] By applying the technical solution of the present invention, the working mode of the fresh air device can be changed by changing the connection mode of the switching port. Specifically, when the switching port is connected to the exhaust cavity, the indoor polluted air flows into the exhaust cavity from the indoor air inlet and flows out through the switching port. At this time, the fresh air device realizes the function of exhausting the indoor polluted air. When the switching port is connected to the fresh air cavity, the outdoor fresh air flows into the fresh air cavity through the switching port and flows into the room through the fresh air outlet. At this time, the fresh air device realizes the function of introducing fresh air into the room. Therefore, the technical solution provided by the present invention can solve the technical problem that the fresh air device in the prior art cannot realize the peak function. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0022] Figure 1A schematic diagram showing the airflow direction when the switch port of the fresh air device provided in the first embodiment of the present invention is used to discharge indoor polluted air;

[0023] Figure 2 A schematic diagram showing the airflow direction when the fresh air inlet of the fresh air device provided in the first embodiment of the present invention is used to introduce outdoor fresh air;

[0024] Figure 3 It shows a schematic diagram of airflow direction when the switch port and the fresh air inlet of the fresh air device provided in the first embodiment of the present invention are both used to introduce outdoor fresh air;

[0025] Figure 4 It shows a schematic structural diagram of a communication opening provided in a first embodiment of the present invention when it is in a first open state;

[0026] Figure 5 It shows a schematic structural diagram of a communication opening provided in the first embodiment of the present invention when it is in a second open state;

[0027] Figure 6 It shows a schematic structural diagram of a switching mechanism provided according to the first embodiment of the present invention;

[0028] Figure 7 An exploded view of a fresh air device provided according to Embodiment 1 of the present invention is shown;

[0029] Figure 8 It shows a schematic structural diagram of a sealing cover provided according to the first embodiment of the present invention;

[0030] Fig. 9 A schematic structural diagram of a volute provided according to Embodiment 1 of the present invention is shown;

[0031] Fig.10 It shows a structural schematic diagram of an air-conditioning indoor unit provided according to the second embodiment of the present invention;

[0032] Fig.11 A schematic diagram showing the arrangement position of the air inlet portion of the air conditioner indoor unit provided in accordance with the second embodiment of the present invention is shown;

[0033] Fig.12 A schematic diagram showing the arrangement position of a fresh air outlet of an air-conditioning indoor unit provided in accordance with a second embodiment of the present invention is shown.

[0034] The above drawings include the following reference numerals:

[0035] 10. Fresh air casing; 11. Indoor air inlet; 12. Fresh air outlet; 13. Switching port; 14. Switching air duct; 15. Connecting opening; 151. First opening; 152. Second opening; 16. Connecting casing; 161. First socket; 17. Fresh air inlet; 18. Motor mounting plate; 19. Volute; 191. First fan blade mounting port; 192. Second fan blade mounting port; 110. Sealing cover; 20. Fresh air induction structure; 21. Fresh air cavity; 22. Fresh air machine; 30, exhaust structure; 31, exhaust chamber; 32, exhaust fan; 40, switching mechanism; 41, first switching plate; 42, second switching plate; 43, driving gear; 44, first driving rack; 45, second driving rack; 50, indoor unit housing; 51, rear panel; 511, air inlet; 52, front panel; 521, fresh air outlet; 60, induced draft housing; 71, exhaust duct joint; 72, fresh air duct joint; 80, mounting bracket; 81, filter. DETAILED DESCRIPTION

[0036] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0037] like Figures 1 to 9 As shown, according to the first embodiment of the present invention, a fresh air device is provided, which includes a fresh air casing 10, a fresh air induction structure 20 and an exhaust structure 30. The fresh air casing 10 is provided with an indoor air inlet 11, a fresh air outlet 12 and a switch port 13. The indoor air inlet 11 and the fresh air outlet 12 are both used to communicate with indoor air, and the switch port 13 is used to communicate with outdoor air. The fresh air induction structure 20 and the exhaust structure 30 are arranged in the fresh air casing 10 at intervals. The indoor air inlet 11 is communicated with the exhaust cavity 31 of the exhaust structure 30, and the fresh air outlet 12 is communicated with the fresh air cavity 21 of the fresh air induction structure 20. The switch port 13 can be selectively communicated with the fresh air cavity 21 or the exhaust cavity 31, so that the air flowing from the indoor air inlet 11 into the exhaust cavity 31 flows out through the switch port 13, or the fresh air introduced by the switch port 13 flows out from the fresh air outlet 12 after passing through the fresh air cavity 21.

[0038] By adopting the fresh air device provided in this embodiment, the working mode of the fresh air device can be changed by changing the connection mode of the switching port 13. Specifically, when the switching port 13 is connected to the exhaust chamber 31, the indoor polluted air flows into the exhaust chamber 31 from the indoor air inlet 11, and flows out through the switching port 13. At this time, the fresh air device realizes the function of exhausting the indoor polluted air. When the switching port 13 is connected to the fresh air chamber 21, the outdoor fresh air flows into the fresh air chamber 21 through the switching port 13, and flows into the room through the fresh air outlet 12. At this time, the fresh air device realizes the function of introducing fresh air into the room. Therefore, the fresh air device provided in this embodiment can solve the technical problem that the fresh air device in the prior art cannot realize the peak function.

[0039] Specifically, a fresh air fan 22 is installed in the fresh air chamber 21 , and an exhaust air fan 32 is installed in the exhaust air chamber 31 .

[0040] In this embodiment, a switch air duct 14 is further provided in the fresh air casing 10. The switch air duct 14 is provided between the fresh air induction structure 20 and the exhaust structure 30. A switch port 13 is formed at one end of the switch air duct 14. A connecting opening 15 is provided at the other end of the switch air duct 14. The connecting opening 15 has a first opening state connected to the exhaust chamber 31 and a second opening state connected to the fresh air chamber 21, so that the switch port 13 can be selectively connected to the fresh air chamber 21 or the exhaust chamber 31 through the connecting opening 15. With such a structural arrangement, the structural layout in the fresh air casing 10 can be optimized, the compactness of the structural arrangement can be improved, and it is also convenient for the switch port 13 to be smoothly switched to a state connected to the fresh air chamber 21 or the exhaust chamber 31, thereby improving the switching stability, so as to stably realize the functions of introducing fresh air and exhausting sewage air.

[0041] Specifically, the fresh air device in this embodiment further includes a switching mechanism 40, and the switching part of the switching mechanism 40 is movably arranged at the communication opening 15, so that the communication opening 15 is in the first open state or the second open state under the switching action of the switching mechanism 40. With such a structural setting, it is convenient to select the open state of the communication opening according to actual needs, and the automatic switching is adopted to improve the automation degree of the structure, which is convenient for users to control and operate.

[0042] In this embodiment, the communication opening portion 15 includes a first opening 151 and a second opening 152 that are connected to each other. The first opening 151 is arranged toward the exhaust chamber 31, and the second opening 152 is arranged toward the fresh air chamber 21. The switching mechanism 40 includes a first switching plate 41 and a second switching plate 42. The first switching plate 41 is movably arranged at the first opening 151, and the second switching plate 42 is movably arranged at the second opening 152. When the communication opening is in the first open state, the first switching plate 41 moves to a position to avoid the first opening 151, and the second switching plate 42 moves to a position to cover the second opening 152. When the communication opening is in the second open state, the first switching plate 41 moves to a position to cover the first opening 151, and the second switching plate 42 moves to a position to avoid the second opening 152. With such a structural setting, stable switching can be facilitated, so that the switching port 13 can be smoothly switched to a position connected to the fresh air chamber 21 or the exhaust chamber 31, thereby improving the movement stability of the structure.

[0043] In this embodiment, the opening direction of the first opening 151 and the opening direction of the second opening 152 are set at a preset angle, and the corresponding first switching plate 41 and the second switching plate 42 are also set at a corresponding preset angle, so as to respectively open or close the first opening 151 or the second opening 152. Preferably, in this embodiment, the angle between the opening direction of the first opening 151 and the opening direction of the second opening 152 is 90°, and the angle between the first switching plate 41 and the second switching plate 42 is also 90°, which also facilitates the first switching plate 41 and the second switching plate 42 to be staggered, so as to provide sufficient movement space for both the first switching plate 41 and the second switching plate 42.

[0044] Specifically, the first switching plate 41 may be movably disposed at the first opening 151. Alternatively, the second switching plate 42 may be movably disposed at the second opening 152. Alternatively, the first switching plate 41 may be movably disposed at the first opening 151; and the second switching plate 42 may be movably disposed at the second opening 152.

[0045] Preferably, the first switching plate 41 is movably disposed at the first opening 151, and the second switching plate 42 is movably disposed at the second opening 152. The movable activity mode requires a smaller range of motion and a smaller space, which is easy to implement and ensures smooth movement.

[0046] In this embodiment, the switching mechanism 40 further includes a driving part, which is drivingly connected to the switching part, and the driving part includes a gear rack structure meshing with each other. With such a structural arrangement, the structure is simple and the function is reliable.

[0047] Specifically, the switching mechanism 40 in this embodiment includes a driving gear 43, a first driving rack 44, and a second driving rack 45. The first driving rack 44 is meshed with the driving gear 43, and the first driving rack 44 is connected to the first switching plate 41, so that the driving gear 43 drives the first switching plate 41 to move through the first driving rack 44. The second driving rack 45 is meshed with the driving gear 43, and the first driving rack 44 and the second driving rack 45 are respectively located on both sides of the driving gear 43, and the second driving rack 45 is connected to the second switching plate 42, so that the driving gear 43 drives the second switching plate 42 to move through the second driving rack 45. With such a structural arrangement, the first driving rack 44 and the second driving rack 45 can be driven to move at the same time by one driving gear 43, the structure is simple, the function is reliable, and it is easy to stably drive the first switching plate 41 and the second switching plate 42 to move respectively through the first driving rack 44 and the second driving rack 45. Specifically, the moving direction of the first driving rack 44 is opposite to the moving direction of the second driving rack 45 , so as to close the second opening 152 when the first opening 151 is opened or close the first opening 151 when the second opening 152 is opened.

[0048] Preferably, the first drive rack 44 and the second drive rack 45 in this embodiment are respectively located above and below the drive gear 43 , the first switching plate 41 is vertically arranged with the first drive rack 44 , and the second switching plate 42 is flush or parallel with the second drive rack 45 .

[0049] In this embodiment, the fresh air machine housing 10 has a connecting shell 16, which is used to enclose the switching air duct 14, and the connecting opening is set on the connecting shell 16. A first socket 161 can be set on the side wall of the connecting shell 16, and the first socket 161 is adapted to the shape of the first switching plate 41, so that the first switching plate 41 is inserted into the first socket 161 and covers the first opening 151. Alternatively, a second socket can be set on the side wall of the connecting shell 16, and the second socket is adapted to the shape of the second switching plate 42, so that the second switching plate 42 is inserted into the second socket and covers the second opening 152. Alternatively, a first socket 161 and a second socket are provided on the side wall of the connecting shell 16, and the first socket 161 and the second socket are spaced apart. The first socket 161 is adapted to the shape of the first switching board 41 so that the first switching board 41 is inserted into the first socket 161 and covers the first opening 151; the second socket is adapted to the shape of the second switching board 42 so that the second switching board 42 is inserted into the second socket and covers the second opening 152.

[0050] Preferably, a first socket 161 and a second socket are provided on the side wall of the connecting shell 16, and the first socket 161 and the second socket are arranged at intervals. The first socket 161 is adapted to the shape of the first switching plate 41, so that the first switching plate 41 is inserted into the first socket 161 and covers the first opening 151; the second socket is adapted to the shape of the second switching plate 42, so that the second switching plate 42 is inserted into the second socket and covers the second opening 152. With such a structural arrangement, it is convenient to guide the movement direction of the first switching plate 41 and the second switching plate 42 through the first socket 161 and the second socket, and limit the position of the first switching plate 41 and the second switching plate 42. In this way, when the first switching plate 41 is inserted into the first socket 161 and covers the first opening 151, the position of the first switching plate 41 is limited by the first socket 161, and the sealing performance at the first opening 151 can be improved to a certain extent. When the second switching plate 42 is inserted into the second socket and covers the second opening 152 , the second socket limits the position of the second switching plate 42 , which can improve the sealing performance at the second opening 152 to a certain extent.

[0051] In order to further improve the sealing performance of covering the first opening 151 and the sealing performance of covering the second opening 152 , in this embodiment, a first sealing ring is provided at the periphery of the first opening 151 , and a second sealing ring is provided at the periphery of the second opening 152 .

[0052] Specifically, the fresh air housing 10 in this embodiment is further provided with a fresh air inlet 17, which is used to introduce outdoor fresh air, and the fresh air inlet 17 is connected to the fresh air cavity 21, so that the outdoor fresh air introduced by the fresh air inlet 17 flows into the fresh air cavity 21. With such a structural arrangement, when the fresh air device realizes the fresh air function, the fresh air can be introduced only through the fresh air inlet 17, or through the fresh air inlet 17 and the switch port 13 at the same time, so as to realize different fresh air intake modes according to the demand for fresh air. Specifically, when fresh air is introduced through the fresh air inlet 17 and the switch port 13 at the same time, the fresh air intake volume can be effectively increased, thereby effectively improving the indoor air quality.

[0053] Specifically, the fresh air outlet 12 can be set on one side of the fresh air casing 10, and the indoor air inlet 11 and the switch port 13 can be set on the other side of the fresh air casing 10. Since the fresh air outlet 12 is used to discharge fresh air indoors, the fresh air outlet 12 can be set toward the indoor user, and the indoor air inlet 11 and the switch port 13 can be set away from the indoor user to avoid affecting the air outlet of the fresh air outlet 12, and also improve the appearance of the fresh air device. Alternatively, the indoor air inlet 11 is set above the switch port 13, so that a sufficient amount of polluted air can be introduced through the indoor air inlet 11, so as to improve the polluted air exhaust effect. Alternatively, the fresh air outlet 12 is set on one side of the fresh air casing 10, and the indoor air inlet 11 and the switch port 13 are set on the other side of the fresh air casing 10, and the indoor air inlet 11 is set above the switch port 13.

[0054] Preferably, in this embodiment, the fresh air outlet 12 is arranged on one side of the fresh air casing 10, the indoor air inlet 11 and the switch port 13 are arranged on the other side of the fresh air casing 10, and the indoor air inlet 11 is arranged above the switch port 13. With such a structural layout, it is possible to facilitate the discharge of fresh air to better improve the indoor air quality, optimize the appearance and aesthetics, and also facilitate the improvement of the sewage exhaust effect.

[0055] Specifically, the fresh air housing 10 is also provided with a fresh air inlet 17, which is used to introduce outdoor fresh air. The fresh air inlet 17 is connected to the fresh air cavity 21, so that the outdoor fresh air introduced by the fresh air inlet 17 flows into the fresh air cavity 21. The fresh air inlet 17, the indoor air inlet 11 and the switch port 13 are all located on the same side of the fresh air housing 10, the indoor air inlet 11 is located above the fresh air inlet 17, and the switch port 13 is arranged between the indoor air inlet 11 and the fresh air inlet 17. With such a structural setting, the structural layout is optimized, and it is convenient to introduce fresh air into the room. By hiding the indoor air inlet 11, the switch port 13 and the fresh air inlet 17 on the other side, the appearance is beautified.

[0056] In this embodiment, the fresh air casing 10 includes a motor mounting plate 18, a volute 19 and a sealing cover 110. The volute 19 has a first fan blade mounting opening 191 and a second fan blade mounting opening 192 which are arranged at intervals. The motor mounting plate 18 and the sealing cover 110 are respectively mounted on both sides of the volute 19 to respectively form an exhaust air cavity 31 and a fresh air cavity 21 with the first fan blade mounting opening 191 and the second fan blade mounting opening 192. The above structure is simple, easy to manufacture, improves the compactness of the structural layout, and is also easy to disassemble and assemble.

[0057] Specifically, the fresh air device in this embodiment is used to be installed in the indoor unit housing 50 of the air conditioner indoor unit, the sealing cover 110 is arranged opposite to the rear panel 51 of the indoor unit housing 50, and the motor mounting plate 18 is arranged opposite to the front panel 52 of the indoor unit housing 50; the fresh air outlet 12 is arranged on the motor mounting plate 18, and the indoor air inlet 11, the switching port 13 and the fresh air inlet 17 are all arranged on the sealing cover 110. Generally, the rear panel 51 of the indoor unit housing 50 is arranged close to the wall, and the front panel 52 of the indoor unit housing 50 is arranged toward the user. With such a structural arrangement, it is convenient to make the fresh air outlet 12 discharge air through the front panel 52, so that the fresh air can be smoothly blown into the room to improve the quality of the indoor air.

[0058] In this embodiment, a fresh air outlet 521 is provided on the front panel 52 of the indoor unit housing 50, and the fresh air device is located at the rear side of the indoor unit housing 50 to avoid affecting other structures in the indoor unit housing 50. At the same time, the fresh air device is arranged at the rear side of the indoor unit housing 50 to facilitate the connection with the hole on the wall, so as to facilitate the connection with the outdoor air. The fresh air device also includes an air induction housing 60, which extends from the rear panel 51 of the indoor unit housing 50 to the front panel 52 of the indoor unit housing 50, one end of the air induction housing 60 is connected to the fresh air outlet 12, and the other end of the air induction housing 60 is arranged toward the fresh air outlet 521. With such a structural arrangement, other structures in the indoor unit housing 50 can be avoided, and fresh air can be smoothly introduced into the fresh air outlet 521, so that fresh air can smoothly enter the room, thereby better improving the indoor air quality.

[0059] Generally, when the air conditioner is turned on, the room is usually closed, and the dirty air in the room cannot be discharged to the outside in time, and the outdoor air cannot be introduced into the room in time, resulting in the higher the concentration of carbon dioxide, the higher the harm to the human body. The fresh air device of this embodiment can draw the outdoor fresh air into the room when working, and discharge the indoor dirty air to the outside, so as to keep the indoor air fresh and enable users to obtain better functional and comfortable experience.

[0060] The fresh air assembly of the present application can introduce outdoor fresh air and exhaust indoor polluted air, and can improve the indoor air quality. In addition to single-pipe fresh air introduction (i.e., a duct joint is installed at the fresh air inlet 17 to introduce fresh air), the fresh air assembly can also achieve double-pipe fresh air introduction (the fresh air inlet 17 and the switch port 13 are both equipped with duct joints to introduce fresh air at the same time), which can increase the fresh air volume and quickly adjust the indoor air quality.

[0061] In this embodiment, the gear switching mechanism 40 is used to switch between single-tube air induction and double-tube air induction. The patent application discloses a switching mechanism 40 and a fresh air component having the same. The fresh air component is driven by two independent centrifugal fans (a fresh air motor and an exhaust air motor), which can introduce outdoor fresh air and exhaust indoor dirty air, thereby improving indoor air quality. By utilizing the switching mechanism 40, the fresh air component can not only introduce fresh air with a single tube, but also introduce fresh air with a double tube, thereby increasing the fresh air volume and quickly adjusting the indoor air quality.

[0062] As shown in the attached drawings, there is a fresh air outlet 521 in front of the air conditioner housing, and the fresh air outlet 521 is used to discharge fresh air into the room. There are two indoor air inlets 11 at the back of the air conditioner housing, and the two indoor air inlets 11 are used to introduce indoor dirty air into the air conditioner, and then discharge it outdoors through the air conditioning.

[0063] As shown in the attached drawings, the fresh air device is located below the air conditioner, and the fresh air device and the main air duct of the air conditioner operate independently of each other, and are not affected by changes in the main air duct during operation. The fresh air device includes a motor plate, an exhaust motor, a fresh air motor, an exhaust impeller, a fresh air impeller, a volute 19, a sealing cover 110, a filter 81, a mounting bracket 80, a switching mechanism 40, an exhaust air duct joint 71, and a fresh air duct joint 72. The filter 81 is first assembled with the mounting bracket 80, and then assembled together in the sealing cover 110.

[0064] As shown in the accompanying drawings, the upper part of the sealing cover 110 has two air inlets, which are connected to the air inlet 511 of the indoor unit housing 50 to introduce dirty air into the room. The sealing cover 110 has a switch, and the switch port 13 is connected to the exhaust air duct joint 71. The sealing cover 110 has a fresh air inlet 17, which is connected to the fresh air duct joint 72.

[0065] As shown in the accompanying drawings, the switching mechanism 40 is composed of a lower rack assembly, an upper rack assembly and a driving gear 43. The lower rack assembly includes a second rack and a second switching plate 42 (a flat plate structure), and the second rack and the second switching plate 42 are fixedly connected together; the upper rack assembly includes a first rack and a first switching plate 41 (a flat plate structure), and the first rack and the first switching plate 41 are fixedly connected together. The driving gear 43 controls the movement of the lower rack assembly and the upper rack assembly at the same time, and the movement directions of the lower rack assembly and the upper rack assembly are opposite.

[0066] The switching mechanism 40 is used to connect and disconnect the exhaust air duct joint 71 and the fresh air duct joint 72, so as to realize one duct or two ducts to lead fresh air. The switching mechanism 40 has two moving positions. The two different positions are as follows: Figure 1 and Figure 2 (position 1) and Figure 3(Position 2) is shown. The switching mechanism 40 realizes the switching of two positions by the forward and reverse rotation of the gear. The position of the switching mechanism 40 is Figure 1 and Figure 2 (position 1), the exhaust air duct connector 71 is not connected to the fresh air duct connector 72, so that fresh air is introduced through a single duct. Figure 3 (Position 2), the exhaust air duct joint 71 is connected with the fresh air duct joint 72, so that the fresh air is introduced by two pipes.

[0067] As shown in the accompanying drawings, when the switching mechanism 40 is in the Figure 1 and Figure 2 Position (position 1), when the exhaust motor is turned on, the indoor air passes through the air inlet and the air inlet, flows into the exhaust fan 32, and then the airflow passes through the exhaust air duct joint 71, and then flows into the outdoors, realizing the exhaust mode, and exhausting the indoor dirty air to the outdoors.

[0068] Referring to the accompanying drawings, it can be seen that on the basis of the exhaust mode, when the exhaust motor is turned off and the fresh air motor is turned on, the outdoor air flows into the sealing cover 110 through the fresh air duct joint 72, is filtered by the filter screen 81 and the filter screen 81, and flows into the room driven by the fresh air impeller, realizing the single-tube air intake mode, introducing outdoor fresh air into the room, and regulating the indoor air.

[0069] As shown in the accompanying drawings, the switching mechanism 40 is converted into Figure 3 Position (position 2), at this time, the upper rack assembly will block the airflow from the exhaust air duct joint 71 from flowing to the exhaust impeller, and the airflow from the exhaust air duct joint 71 flows into the fresh air impeller. When the fresh air motor is turned on, the external air flows into the exhaust air duct joint 71 and the fresh air duct joint 72 at the same time, and then the airflow is filtered by the filter 81 and flows into the room under the drive of the fresh air impeller, which can realize the double-pipe air induction mode to increase the fresh air volume.

[0070] like Figures 10 to 12 As shown, the second embodiment of the present invention provides an air conditioner indoor unit, the air conditioner indoor unit includes a fresh air device, and the fresh air device is the fresh air device provided in the above embodiment. The air conditioner indoor unit in this embodiment is mainly an air conditioner cabinet structure.

[0071] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects: integrating fresh air introduction and sewage air exhaust, realizing single-pipe and double-pipe fresh air introduction, and improving indoor air quality.

[0072] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0073] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0074] In the description of the present application, it should be understood 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, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0075] 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 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0076] 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. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fresh air device, characterized in that: include: A fresh air casing (10), wherein the fresh air casing (10) is provided with an indoor air inlet (11), a fresh air outlet (12) and a switching port (13), wherein the indoor air inlet (11) and the fresh air outlet (12) are both used for communicating with indoor air, and the switching port (13) is used for communicating with outdoor air; A fresh air induction structure (20) and an exhaust structure (30), wherein the fresh air induction structure (20) and the exhaust structure (30) are arranged in the fresh air casing (10) at intervals, the indoor air inlet (11) is connected to the exhaust cavity (31) of the exhaust structure (30), and the fresh air outlet (12) is connected to the fresh air cavity (21) of the fresh air induction structure (20); The switching port (13) can be selectively connected to the fresh air cavity (21) or the exhaust cavity (31), so that the air flowing from the indoor air inlet (11) into the exhaust cavity (31) flows out through the switching port (13), or the fresh air introduced by the switching port (13) flows out through the fresh air outlet (12) after passing through the air inlet cavity; A switching air duct (14) is further provided in the fresh air casing (10); the switching air duct (14) is provided between the fresh air induction structure (20) and the exhaust structure (30); a switching port (13) is formed at one end of the switching air duct (14); and a communicating opening (15) is provided at the other end of the switching air duct (14); The fresh air device further comprises: a switching mechanism (40); the switching mechanism (40) comprises: a first switching plate (41) and a second switching plate (42); The communication opening portion (15) comprises a first opening (151) and a second opening (152) which are communicated with each other; The fresh air machine housing (10) has a connecting shell (16) therein, the connecting shell (16) is used to enclose the switching air duct (14), and the connecting opening is arranged on the connecting shell (16); A first socket (161) is provided on the side wall of the connection shell (16), and the first socket (161) is adapted to the shape of the first switching plate (41), so that the first switching plate (41) is inserted into the first socket (161) and covers the first opening (151); and / or, A second socket is provided on the side wall of the connection shell (16), and the second socket is adapted to the shape of the second switching plate (42) so that the second switching plate (42) can be inserted into the second socket and cover the second opening (152).

2. The fresh air device according to claim 1, characterized in that: The connecting opening (15) has a first open state connected to the exhaust chamber (31) and a second open state connected to the fresh air chamber (21), so that the switching port (13) can be selectively connected to the fresh air chamber (21) or the exhaust chamber (31) through the connecting opening (15).

3. The fresh air device according to claim 2, characterized in that: The switching portion of the switching mechanism (40) is movably arranged at the communication opening portion (15) so that the communication opening portion (15) is placed in the first open state or the second open state under the switching action of the switching mechanism (40).

4. The fresh air device according to claim 3, characterized in that: The first opening (151) is arranged toward the exhaust cavity (31), and the second opening (152) is arranged toward the fresh air cavity (21); The first switching plate (41) is movably arranged at the first opening (151), and the second switching plate (42) is movably arranged at the second opening (152); when the connecting opening is in the first open state, the first switching plate (41) moves to a position avoiding the first opening (151), and the second switching plate (42) moves to a position covering the second opening (152); when the connecting opening is in the second open state, the first switching plate (41) moves to a position covering the first opening (151), and the second switching plate (42) moves to a position avoiding the second opening (152).

5. The fresh air device according to claim 4, characterized in that: The first switching plate (41) is movably arranged at the first opening (151); and / or, The second switching plate (42) is movably disposed at the second opening (152).

6. The fresh air device according to claim 3, characterized in that: The switching mechanism (40) further comprises a driving part, the driving part is drivingly connected to the switching part, and the driving part comprises a gear rack structure meshing with each other.

7. The fresh air device according to claim 4, characterized in that: The switching mechanism (40) comprises: Drive gear (43); A first driving rack (44) meshing with the driving gear (43), the first driving rack (44) being connected to the first switching plate (41), so that the driving gear (43) drives the first switching plate (41) to move through the first driving rack (44); The second driving rack (45) is meshed with the driving gear (43); the first driving rack (44) and the second driving rack (45) are respectively located on both sides of the driving gear (43); the second driving rack (45) is connected to the second switching plate (42) so that the driving gear (43) drives the second switching plate (42) to move through the second driving rack (45).

8. The fresh air device according to any one of claims 1 to 7, characterized in that: The fresh air casing (10) is also provided with a fresh air inlet (17), which is used to introduce outdoor fresh air. The fresh air inlet (17) is connected to the fresh air cavity (21) so that the outdoor fresh air introduced by the fresh air inlet (17) flows into the fresh air cavity (21).

9. The fresh air device according to any one of claims 1 to 7, characterized in that: The fresh air outlet (12) is arranged on one side of the fresh air casing (10), and the indoor air inlet (11) and the switching port (13) are both arranged on the other side of the fresh air casing (10); and / or, The indoor air inlet (11) is arranged above the switching port (13).

10. The fresh air device according to claim 9, characterized in that: The fresh air casing (10) is also provided with a fresh air inlet (17), the fresh air inlet (17) being used to introduce outdoor fresh air, the fresh air inlet (17) being in communication with the fresh air cavity (21), so that the outdoor fresh air introduced by the fresh air inlet (17) flows into the fresh air cavity (21); The fresh air inlet (17), the indoor air inlet (11) and the switching port (13) are all located on the same side of the fresh air casing (10); the indoor air inlet (11) is located above the fresh air inlet (17); and the switching port (13) is arranged between the indoor air inlet (11) and the fresh air inlet (17).

11. The fresh air device according to claim 10, characterized in that: The fresh air machine casing (10) comprises a motor mounting plate (18), a volute (19) and a sealing cover (110); the volute (19) has a first fan blade mounting opening (191) and a second fan blade mounting opening (192) which are arranged at intervals; the motor mounting plate (18) and the sealing cover (110) are respectively mounted on two sides of the volute (19) to respectively enclose the exhaust air chamber (31) and the fresh air chamber (21) together with the first fan blade mounting opening (191) and the second fan blade mounting opening (192).

12. The fresh air device according to claim 11, characterized in that: The fresh air device is used to be installed in an indoor unit casing (50) of an air conditioner indoor unit; the sealing cover (110) is arranged opposite to a rear panel (51) of the indoor unit casing (50); the motor mounting plate (18) is arranged opposite to a front panel (52) of the indoor unit casing (50); the fresh air outlet (12) is arranged on the motor mounting plate (18); the indoor air inlet (11), the switching port (13) and the fresh air inlet (17) are all arranged on the sealing cover (110).

13. The fresh air device according to claim 12, characterized in that: A fresh air outlet (521) is provided on the front panel (52) of the indoor unit casing (50), and the fresh air device is located at the rear side of the indoor unit casing (50). The fresh air device further comprises: An air induced shell (60), the air induced shell (60) extending from a rear panel (51) of the indoor unit shell (50) toward a front panel (52) of the indoor unit shell (50), one end of the air induced shell (60) being connected to the fresh air outlet (12), and the other end of the air induced shell (60) being arranged toward the fresh air outlet portion (521).

14. An air conditioner indoor unit, characterized in that: The air conditioner indoor unit includes a fresh air device, and the fresh air device is the fresh air device according to any one of claims 1 to 13.

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