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 housing, the fresh air housing being provided with an indoor air inlet, a fresh air outlet, and a switching port, the indoor air inlet and the fresh air outlet both being used to communicate with indoor air, and the switching port being used to communicate with outdoor air; a fresh air induction structure and an exhaust structure, the fresh air induction structure and the exhaust structure being spaced apart within the fresh air housing, the exhaust structure being provided above the fresh air induction structure, the indoor air inlet being connected to an exhaust cavity of the exhaust structure, and the fresh air outlet being connected to a fresh air cavity of the fresh air induction structure; wherein the switching port is selectively connected to either the fresh air cavity or the exhaust cavity, so that 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 through the fresh air cavity and then is discharged from the fresh air outlet. The technical solution provided by the present invention can solve the problem that fresh air devices in the prior art cannot achieve an exhaust function.

Description

Technical Field

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

[0002] With the improvement of people's living standards, users now require air conditioners to provide not only cooling and heating functions but also fresh indoor air. Therefore, existing air conditioners generally incorporate fresh air functions to enhance 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 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 the indoor air, and the switching port is used to communicate with the outdoor air; a fresh air induced structure and an exhaust structure, the fresh air induced structure and the exhaust structure are arranged at intervals in the fresh air casing, the exhaust structure is arranged above the fresh air induced structure, 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 induced 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 is discharged 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 arranged between the fresh air inlet structure and the exhaust structure. The switching air duct has a switching port, a first connecting port and a second connecting port arranged at intervals. The first connecting port is used to connect with the exhaust cavity, and the second connecting port is used to connect with the fresh air cavity. The switching port can be selectively connected with the first connecting port or the second connecting port.

[0007] Furthermore, the switching port and the first communicating port are respectively located at two ends of the switching air duct, and the second communicating port is located at a side of the switching air duct.

[0008] Furthermore, the fresh air device also includes: a switching mechanism, the switching mechanism having a switching part movably arranged at the first connecting port and the second connecting port; when the switching part closes the first connecting port and opens the second connecting port, the switching port is connected with the second connecting port; when the switching part opens the first connecting port and closes the second connecting port, the switching port is connected with the first connecting port.

[0009] Furthermore, the fresh air device also includes: a first switching plate, which is rotatably arranged at the first connecting port to open or close the first connecting port through the first switching plate; and a second switching plate, which is rotatably arranged at the second connecting port to open or close the second connecting port through the second switching plate.

[0010] Furthermore, a fresh air inlet is provided on the fresh air casing, which 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.

[0011] 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.

[0012] Furthermore, the fresh air induction structure also includes: a filter element installed in the fresh air cavity, and the filter element is spaced apart from the second connecting port so that the filter element can filter the fresh air entering through the second connecting port.

[0013] Furthermore, a fresh air inlet is provided on the fresh air casing, which is used to introduce outdoor fresh air. The fresh air inlet is connected to the fresh air cavity. The fresh air inlet is arranged opposite to the filter element, and the filter element is located on the side of the second connecting port away from the fresh air inlet.

[0014] Furthermore, the fresh air device also includes: a switching mechanism, installed on the fresh air casing, the switching mechanism is located between the fresh air inlet structure and the exhaust structure, and a plurality of connection ports are provided on the switching mechanism; the switching mechanism can be movably arranged so that two of the multiple connection ports are respectively connected to the indoor air inlet and the switching port, or so that two of the multiple connection ports are respectively connected to the fresh air outlet and the switching port.

[0015] Further, the switching mechanism includes: a first rotating sleeve, which is rotatably arranged, and a first connecting port is arranged on the side wall of the first rotating sleeve, and there are at least three first connecting ports, and at least three first connecting ports are spaced apart on the side wall of the first rotating sleeve; a second rotating sleeve, which is rotatably arranged in the first rotating sleeve, and a second connecting port is arranged on the side wall of the second rotating sleeve, and there are at least three second connecting ports, and at least three second connecting ports are spaced apart on the side wall of the second rotating sleeve; wherein, when the switching port is used for exhaust, the two first connecting ports are respectively arranged opposite to the two second connecting ports to form a switching port and an indoor air inlet respectively; when the switching port is used to introduce fresh air, the two first connecting ports are respectively arranged opposite to the two second connecting ports to form a switching port and a fresh air outlet respectively.

[0016] According to another aspect of the present invention, an air-conditioning indoor unit is provided, and the air-conditioning indoor unit includes the fresh air device provided above.

[0017] By applying the technical solution of the present invention, the operating mode of the fresh air device can be changed by changing the connection method of the switching port. Specifically, when the switching port is connected to the exhaust cavity, 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 indoor polluted air. When the switching port is connected to the fresh air cavity, 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 fresh air device provided by this embodiment can solve the problem that the fresh air device in the prior art cannot realize the exhaust function. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 A schematic structural diagram of a fresh air device provided in an embodiment of the present invention is shown;

[0020] Figure 2 A schematic structural diagram showing a partial structure of a fresh air device provided in an embodiment of the present invention;

[0021] Figure 3 A schematic diagram of an air flow path in which a switch port and a fresh air inlet of a fresh air device provided according to an embodiment of the present invention are both used for air intake is shown;

[0022] Figure 4 A schematic diagram of an airflow path of a switch port of a fresh air device provided in an embodiment of the present invention for exhausting air is shown;

[0023] Figure 5A schematic diagram of an air flow path of a fresh air inlet of a fresh air device provided according to an embodiment of the present invention is shown;

[0024] Figure 6 It shows a schematic structural diagram of a first driving plate driven by a motor of a fresh air device provided in an embodiment of the present invention;

[0025] Figure 7 A schematic structural diagram of a first rotating sleeve and a second rotating sleeve of a fresh air device provided in an embodiment of the present invention is shown;

[0026] Figure 8 A schematic diagram of a flow path of a first rotating sleeve and a second rotating sleeve of a fresh air device provided by an embodiment of the present invention moving to a switching port for exhausting air is shown;

[0027] Figure 9 A schematic diagram of a flow path of a fresh air device according to an embodiment of the present invention, in which a first rotating sleeve and a second rotating sleeve move to a switching port to introduce fresh air, is shown;

[0028] Figure 10 A schematic structural diagram of the first rotating sleeve and the second rotating sleeve of the fresh air device provided by an embodiment of the present invention when they move to the closed position is shown;

[0029] Figure 11 A logic flow chart showing switching of a fresh air device in different modes according to an embodiment of the present invention is shown;

[0030] Figure 12 A logic flow chart showing the use of a fresh air inlet of a fresh air device provided according to an embodiment of the present invention for intake of fresh air is shown;

[0031] Figure 13 A logic flow chart showing that both the fresh air inlet and the switching port of the fresh air device provided by an embodiment of the present invention are used to introduce fresh air is shown;

[0032] Figure 14 A logic flow chart of the switching port of the fresh air device provided in accordance with an embodiment of the present invention for exhausting air is shown.

[0033] The above drawings include the following reference numerals:

[0034] 10. Fresh air casing; 11. Indoor air inlet; 12. Fresh air outlet; 13. Switching port; 14. Switching air duct; 15. First connecting port; 16. Second connecting port; 17. Fresh air inlet; 20. Fresh air induction structure; 21. Fresh air cavity; 22. Filter element; 23. Fresh air fan; 30. Exhaust structure; 31. Exhaust cavity; 32. Exhaust fan; 40. Switching mechanism; 41. First switching plate; 42. Second switching plate; 43. First rotating sleeve; 431. First connecting port; 44. Second rotating sleeve; 441. Second connecting port; 45. Motor; 50. Fresh air duct; 60. Exhaust duct. DETAILED DESCRIPTION

[0035] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this 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.

[0036] like Figures 1 to 14 As shown, an embodiment of the present invention provides a fresh air device, which includes a fresh air housing 10, a fresh air inlet structure 20, and an exhaust structure 30. The fresh air housing 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 inlet structure 20 and the exhaust structure 30 are spaced apart within the fresh air housing 10, and the exhaust structure 30 is disposed above the fresh air inlet structure 20. The indoor air inlet 11 communicates with an exhaust cavity 31 of the exhaust structure 30, and the fresh air outlet 12 communicates with the fresh air cavity 21 of the fresh air inlet structure 20. The switch port 13 can selectively communicate with the fresh air cavity 21 or the exhaust cavity 31, so that 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 passes through the fresh air cavity 21 and is discharged from the fresh air outlet 12.

[0037] 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. In addition, by arranging the exhaust structure 30 above the fresh air induction structure 20, the overall structural thickness of the fresh air device can be reduced, and the indoor air inlet 11 of the fresh air induction structure 20 can also be located at a higher position of the entire fresh air device, so that the indoor air can fully flow into the indoor air inlet 11, thereby facilitating the full discharge of the indoor polluted air. At the same time, this structural layout also enables the fresh air outlet 12 to be located on the fresh air induction structure 20 at the bottom, thereby spacing the fresh air outlet 12 and the indoor air inlet 11 apart to prevent interference between the fresh air outlet and the exhaust of indoor polluted air, thereby better improving indoor air quality and user comfort. Therefore, the fresh air device provided by this embodiment can solve the problem that the fresh air device in the prior art cannot realize the exhaust function.

[0038] Specifically, the fresh air casing 10 of this embodiment further includes a switch duct 14 disposed between the fresh air induction structure 20 and the exhaust structure 30. The switch duct 14 includes a switch port 13, a first communication port 15, and a second communication port 16, which are spaced apart. The first communication port 15 is configured to communicate with the exhaust cavity 31, and the second communication port 16 is configured to communicate with the fresh air cavity 21. The switch port 13 can selectively communicate with either the first communication port 15 or the second communication port 16. This structural arrangement facilitates smooth switching of the switch port 13 to communicate with the first communication port 15 for smooth exhaust operation; alternatively, the switch port 13 can smoothly switch to communicate with the second communication port 16 for introducing outdoor fresh air into the fresh air cavity 21 through the switch port 13 to achieve fresh air induction operation.

[0039] In this embodiment, the switch port 13 and the first communication port 15 are located at both ends of the switch duct 14, respectively, and the second communication port 16 is located on the side of the switch duct 14. This structural arrangement optimizes the structural layout of the switch port 13, the first communication port 15, and the second communication port 16, so that the switch port 13, the first communication port 15, and the second communication port 16 can be coordinated and installed with corresponding structures, thereby facilitating the optimization of the layout of the fresh air induction structure 20 and the exhaust structure 30.

[0040] Specifically, the fresh air device in this embodiment further includes a switching mechanism 40 having a switching portion movably disposed at the first communication port 15 and the second communication port 16. When the switching mechanism 40 is switched, the switching port 13 is connected to the first communication port 15 or the second communication port 16. Specifically, when the switching portion closes the first communication port 15 and opens the second communication port 16, the switching port 13 is connected to the second communication port 16; when the switching portion opens the first communication port 15 and closes the second communication port 16, the switching port 13 is connected to the first communication port 15. This structural arrangement facilitates the switching mechanism 40 in connecting the switching port 13 to the first communication port 15 or the second communication port 16, thereby smoothly switching the fresh air device to the fresh air introduction function or the sewage air exhaust function.

[0041] In this embodiment, the fresh air device also includes a first switching plate 41 and a second switching plate 42. The first switching plate 41 is rotatably disposed at the first connecting port 15 to open or close the first connecting port 15 through the first switching plate 41. The second switching plate 42 is rotatably disposed at the second connecting port 16 to open or close the second connecting port 16 through the second switching plate 42. With such a structural arrangement, the switching port 13 can be conveniently switched to a position connected to the first connecting port 15 or the second connecting port 16 through the first switching plate 41 and the second switching plate 42, so as to realize the function of introducing fresh air or exhausting sewage air. The above structure is simple and reliable. Specifically, when the first connecting port 15 is opened, the first switching plate 41 rotates to a position that avoids the first connecting port 15; when the first connecting port 15 is closed, the first switching plate 41 rotates to a position that covers the first connecting port 15. When the second communication port 16 is opened, the second switching plate 42 rotates to a position avoiding the second communication port 16 ; when the second communication port 16 is closed, the second switching plate 42 rotates to a position covering the second communication port 16 .

[0042] Specifically, the fresh air housing 10 of this embodiment is further provided with a fresh air inlet 17 for introducing outdoor fresh air. The fresh air inlet 17 is communicated 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. With such a structural arrangement, when the fresh air device realizes the fresh air function, air can be introduced only through the fresh air inlet 17, or through both the fresh air inlet 17 and the switching port 13, thereby realizing different fresh air intake modes according to the demand for fresh air. Specifically, when fresh air is introduced through both the fresh air inlet 17 and the switching port 13, the fresh air intake volume can be effectively increased, thereby effectively improving the indoor air quality.

[0043] 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 switching port 13 can be set on the other side of the fresh air casing 10. The fresh air outlet 12 is used to discharge fresh air into the room, so the fresh air outlet 12 can be set toward the indoor user, and the indoor air inlet 11 and the switching port 13 can be set on the side away from the indoor user. In this way, it can avoid the impact on the air outlet 12 and improve the appearance of the fresh air device. Alternatively, the indoor air inlet 11 is set above the switching 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 switching port 13 are set on the other side of the fresh air casing 10, and the indoor air inlet 11 is set above the switching port 13.

[0044] Preferably, in this embodiment, the fresh air outlet 12 is disposed on one side of the fresh air housing 10, while the indoor air inlet 11 and the switching port 13 are both disposed on the other side of the fresh air housing 10, with the indoor air inlet 11 disposed above the switching port 13. This allows fresh air to flow smoothly into the room, effectively improving indoor air quality, optimizing the aesthetics, and facilitating improved waste air removal. Preferably, when the fresh air device is adapted for an indoor air conditioner, the fresh air outlet 12 can be disposed at the bottom of the indoor air conditioner, separated from the cooling or heating air outlets of the air conditioner.

[0045] Preferably, when a fresh air inlet 17 is provided on the fresh air casing 10 , the switching port 13 can be provided between the fresh air inlet 17 and the indoor air inlet 11 .

[0046] In this embodiment, the fresh air induction structure 20 further includes a filter element 22 (specifically, the filter element 22 can be a filter mesh), which is installed in the fresh air cavity 21. The filter element 22 is spaced apart from the second communication port 16 so that the filter element 22 filters the fresh air entering through the second communication port 16. With this structural arrangement, the filter element 22 can effectively filter the outdoor fresh air, thereby improving the quality of the fresh air.

[0047] Specifically, the fresh air housing 10 of this embodiment is further provided with a fresh air inlet 17 for introducing outdoor fresh air. The fresh air inlet 17 is connected to the fresh air chamber 21. The fresh air inlet 17 is disposed opposite a filter element 22. The filter element 22 is located on the side of the second communication port 16 away from the fresh air inlet 17. With this structural arrangement, the filter element 22 can facilitate sufficient filtration of the fresh air introduced by both the fresh air inlet 17 and the switching port 13, thereby effectively improving the quality of the fresh air.

[0048] Embodiment 2 of the present invention provides a fresh air device. The difference between the fresh air device in this embodiment and the fresh air device in embodiment 1 is only the difference in the structure of the switching mechanism 40 and the formation of the switching air duct 14. The switching mechanism 40 in this embodiment is installed on the fresh air casing 10. The switching mechanism 40 is located between the fresh air induction structure 20 and the exhaust structure 30. A plurality of connection ports are provided on the switching mechanism 40. The switching mechanism 40 can be movably arranged so that two of the plurality of connection ports are respectively connected to the indoor air inlet 11 and the switching port 13, or so that two of the plurality of connection ports are respectively connected to the fresh air outlet 12 and the switching port 13. With such a structural arrangement, it is possible to facilitate the smooth connection of different connection ports through the switching mechanism 40, thereby realizing the function of introducing fresh air or exhausting sewage air. Preferably, the switching structure in this embodiment has a switching air duct 14, and the plurality of connection ports are all connected to the switching air duct 14.

[0049] In this embodiment, the switching mechanism 40 includes a first rotating sleeve 43 and a second rotating sleeve 44. The first rotating sleeve 43 is rotatably mounted. A first connecting port 431 is disposed on a sidewall of the first rotating sleeve 43. There are at least three first connecting ports 431 spaced apart on the sidewall of the first rotating sleeve 43. The second rotating sleeve 44 is rotatably mounted within the first rotating sleeve 43. There are at least three second connecting ports 441 spaced apart on the sidewall of the second rotating sleeve 44. When the switching port 13 is used for exhaust, the two first connecting ports 431 are disposed opposite the two second connecting ports 441 to form the switching port 13 and the indoor air inlet 11, respectively. When the switching port 13 is used for fresh air, the two first connecting ports 431 are disposed opposite the two second connecting ports 441 to form the switching port 13 and the fresh air outlet 12, respectively. With this structural arrangement, the first connection port 431 on the first rotating sleeve 43 and the second connection port 441 on the second rotating sleeve 44 can be docked or staggered to facilitate smooth switching between the fresh air introduction function and the sewage exhaust function. Specifically, the first rotating sleeve 43 and the second rotating sleeve 44 form a switching air duct 14 therein.

[0050] The fresh air devices proposed in the two aforementioned embodiments possess a compact structure. When the device is in operation, the air duct is switched via a switching mechanism, fully utilizing the ventilation duct connected to the outside. Depending on the user-selected program, three air supply functions can be achieved: standard indoor fresh air delivery, enhanced indoor fresh air delivery, and indoor-outdoor ventilation. When the device is off, the fresh air chamber 21 is fully sealed, effectively preventing insects from entering the room. It also prevents outdoor turbulence from leaking into the room through the fresh air device during inclement weather such as typhoons, thereby avoiding wind whistling noises and significantly improving user comfort.

[0051] The fresh air devices in the two aforementioned embodiments address the following technical issues: they fully meet user needs and provide a variety of fresh air functions, including standard indoor fresh air delivery, enhanced indoor fresh air delivery, and indoor-outdoor ventilation. When the fresh air device is disabled, the fresh air chamber 21 is fully sealed, effectively preventing insects and preventing outdoor turbulence from leaking into the room through the fresh air device during severe weather such as typhoons, thereby avoiding wind whistling.

[0052] The fresh air device proposed in the present invention provides users with three functions: normal indoor fresh air delivery, enhanced indoor fresh air delivery, and indoor-outdoor ventilation. Users can activate the relevant fresh air function according to their needs. When the user selects the normal indoor air delivery function, the program-controlled motor 45 closes the valve of the exhaust duct (the valve includes the first switching plate 41 and the second switching plate 42), activates the fresh air fan 23, and shuts off the exhaust fan 32. Outdoor air is filtered through the filter and introduced into the room by the fan, achieving normal indoor fresh air delivery. When the user selects the enhanced indoor air delivery function, the relevant valve of the exhaust duct is opened, turning the exhaust duct 60 into the air inlet duct, the fresh air fan 23 on, and the exhaust fan 32 off. This dual-duct air supply significantly increases the air intake volume, achieving enhanced indoor fresh air delivery. When the user selects the indoor-outdoor ventilation function, the valve position is adjusted to open the exhaust duct, operate the fresh air fan 23, and operate the exhaust fan 32. In this case, the fresh air fan 23 delivers fresh air to the room, and the exhaust fan 32 exhausts old air to the outside.

[0053] The fresh air blower 23 and exhaust blower 32 in this fresh air device operate independently, preventing mixing of fresh and old air cavities and protecting fresh air blower 23 from contamination. When the device is turned off, each flow channel is fully sealed, effectively preventing insects from entering the room. It also prevents outdoor turbulence from leaking into the room through the fresh air device during severe weather such as typhoons, thereby avoiding wind whistling and significantly improving user comfort.

[0054] The present invention proposes an air conditioning fresh air switching device and a control method thereof, which provides users with three functions: ordinary indoor fresh air supply, enhanced indoor fresh air supply, and indoor and outdoor ventilation and air supply. Users can turn on the relevant fresh air function according to their own needs. In the present invention, the air duct valve is directly connected to the stepper motor 45 for driving, such as Figure 2 As shown, the valve is tightly closed, with high torque, and will not be blown by the fan, ensuring that the relevant air duct is well sealed after the valve is rotated. The control logic of various function switching is shown in the figure.

[0055] When the user selects the normal indoor air supply function, the program controls the stepper motor 45 to rotate the first drive plate to the position of closing the first connecting port 15, and the second drive plate to the position of closing the second connecting port 16, and then turns on the fresh air fan 23, and the exhaust fan 32 remains closed. The outdoor air is introduced from the fresh air duct 50, filtered by the filter element 22, and then introduced into the room by the fresh air fan 23, realizing normal indoor fresh air supply.

[0056] When the user selects to enhance the indoor air supply function, the program controls the stepping motor 45 to rotate the valve 1 of the air duct to position 1, and the valve 2 to position 2. Figure 4 As shown, the exhaust duct 60 is also turned into an air inlet duct, the fresh air fan 23 is turned on, and the exhaust fan 32 remains closed. At this time, the double ducts are used for air intake, and the air intake volume is significantly increased, thereby achieving enhanced fresh air delivery in the room.

[0057] When the user selects the indoor and outdoor ventilation and air supply function, the program controls the stepper motor 45 to rotate the valve 1 of the air duct to position 2, and the valve 2 also rotates to position 1. Figure 5 As shown, the fresh air fan 23 is turned on and the exhaust fan 32 is turned on. At this time, the fresh air fan 23 sends fresh air to the room and the exhaust fan 32 exhausts old air to the outside, thereby realizing gas exchange between indoor and outdoor.

[0058] The fresh air blower 23 and exhaust blower 32 of this fresh air device operate independently, preventing mixing of fresh and old airflow paths and contamination of fresh air blower 23. When the device is turned off, a program-controlled stepper motor 45 rotates valve 1 (first switching plate 41) and valve 2 (second switching plate) to position 1, fully sealing the airflow path. This effectively prevents insects from entering the room and prevents turbulent air from leaking into the room through the fresh air device during severe weather such as typhoons, thereby significantly improving user comfort.

[0059] Specifically, the above-mentioned fresh air device can also be used in fresh air blowers, air purifiers, fans and other air supply equipment that can exchange air with the outdoors; use multiple fans to achieve ordinary fresh air supply, enhanced fresh air supply and indoor and outdoor ventilation and supply of various fresh air supply methods.

[0060] Specifically, in Example 1, the switching mechanism 40 can be replaced with a gear transmission to rotate the air duct valve to a predetermined position. The gear transmission mechanism is shown in the figure. The first and second drive plates rotate via this gear transmission mechanism, thereby opening or closing the relevant flow path. This allows for three functions: standard indoor fresh air delivery, enhanced indoor fresh air delivery, and indoor-outdoor ventilation.

[0061] Alternatively, the switching mechanism 40 in the second embodiment is a cylindrical rotating switching mechanism 40, with holes formed in both the first rotating sleeve 43 and the second rotating sleeve 44. Two motors 45 control the inner and outer sleeves to rotate to different positions, respectively. The holes then interact with each other to open or close the corresponding air paths, thereby achieving three functions: standard indoor fresh air delivery, enhanced indoor fresh air delivery, and indoor-outdoor ventilation.

[0062] A third embodiment of the present invention provides an air-conditioning indoor unit. The air-conditioning indoor unit in this embodiment includes the fresh air device provided in the first and second embodiments.

[0063] From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: the present invention proposes an air-conditioning fresh air switching device and a control method thereof, which provides a variety of fresh air functions, including ordinary indoor fresh air supply, enhanced indoor fresh air supply, and indoor and outdoor ventilation and supply. Users can turn on the relevant fresh air function according to their own needs. During operation, the fresh air sent into the room is filtered by the filter, and the old indoor air is discharged to the outside by the exhaust fan. The two fans operate independently, and the new and old air do not mix with each other, ensuring that the fresh air sent into the room is clean. When closed, the fresh air flow channel is fully closed, which can effectively prevent insects from entering the room, and can also prevent outdoor turbulence from leaking into the room through the fresh air device during bad weather such as typhoons, avoiding the occurrence of wind whistling, which will significantly improve the user's comfort.

[0064] 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, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0065] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values 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 drawings are not drawn according to actual proportional relationships. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values should be interpreted as being merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0066] In the description of this application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this 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. Therefore, they cannot be understood as limiting the scope of protection of this application; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0067] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. 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 figures. For example, if the device in the 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.

[0068] 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.

[0069] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection 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 exhaust structure (30) is arranged above the fresh air induction structure (20), 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 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) passes through the fresh air cavity (21) and is discharged from the fresh air outlet (12); The fresh air casing (10) is further provided with a fresh air inlet (17), which is used to introduce outdoor fresh air. The fresh air inlet (17) is arranged opposite to and communicates 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 switching port (13) is located between the fresh air chamber (21) and the exhaust chamber (31), the indoor air inlet (11) is located at the top of the exhaust chamber (31), and the fresh air outlet (12) is located at the bottom of the fresh air chamber (21).

2. The fresh air device according to claim 1, characterized in that: A switching air duct (14) is further provided in the fresh air casing (10), and the switching air duct (14) is provided between the fresh air induction structure (20) and the exhaust structure (30). The switching air duct (14) has the switching port (13), the first connecting port (15) and the second connecting port (16) which are arranged at intervals. The first connecting port (15) is used to communicate with the exhaust cavity (31), and the second connecting port (16) is used to communicate with the fresh air cavity (21). The switching port (13) can be selectively communicated with the first connecting port (15) or the second connecting port (16).

3. The fresh air device according to claim 2, characterized in that: The switching port (13) and the first communication port (15) are respectively located at two ends of the switching air duct (14), and the second communication port (16) is located on the side of the switching air duct (14).

4. The fresh air device according to claim 3, characterized in that: The fresh air device also includes: A switching mechanism (40), the switching mechanism (40) having a switching portion movably arranged at the first communication port (15) and the second communication port (16); When the switching portion closes the first communication port (15) and opens the second communication port (16), the switching port (13) is communicated with the second communication port (16); when the switching portion opens the first communication port (15) and closes the second communication port (16), the switching port (13) is communicated with the first communication port (15).

5. The fresh air device according to claim 3, characterized in that: The fresh air device also includes: a first switching plate (41) rotatably disposed at the first communication port (15) to open or close the first communication port (15) via the first switching plate (41); The second switching plate (42) is rotatably arranged at the second communication port (16) so as to open or close the second communication port (16) through the second switching plate (42).

6. The fresh air device according to any one of claims 1 to 5, 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).

7. The fresh air device according to claim 2, characterized in that: The fresh air inducing structure (20) further includes: A filter element (22) is installed in the fresh air cavity (21), and the filter element (22) is spaced apart from the second communication port (16) so that the filter element (22) filters the fresh air entering through the second communication port (16).

8. The fresh air device according to claim 7, characterized in that: The fresh air casing (10) is further 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 connected to the fresh air cavity (21), the fresh air inlet (17) being arranged opposite to the filter element (22), and the filter element (22) being located on a side of the second connecting port (16) away from the fresh air inlet (17).

9. The fresh air device according to claim 1, characterized in that: The fresh air device also includes: A switching mechanism (40) is mounted on the fresh air casing (10), the switching mechanism (40) being located between the fresh air inlet structure (20) and the exhaust structure (30), and a plurality of connection ports being provided on the switching mechanism (40); the switching mechanism (40) being movably provided so that two of the plurality of connection ports are respectively connected to the indoor air inlet (11) and the switching port (13), or two of the plurality of connection ports are respectively connected to the fresh air outlet (12) and the switching port (13).

10. The fresh air device according to claim 9, characterized in that: The switching mechanism (40) comprises: A first rotating sleeve (43) is rotatably provided, and a first connecting port (431) is provided on a side wall of the first rotating sleeve (43), and there are at least three first connecting ports (431), and the at least three first connecting ports (431) are spaced apart on the side wall of the first rotating sleeve (43); A second rotating sleeve (44) is rotatably disposed within the first rotating sleeve (43), and a second connecting port (441) is disposed on a side wall of the second rotating sleeve (44), wherein the second connecting ports (441) are at least three, and the at least three second connecting ports (441) are spaced apart on the side wall of the second rotating sleeve (44); Wherein, when the switching port (13) is used for exhausting air, the two first connecting ports (431) are respectively arranged opposite to the two second connecting ports (441) to respectively form the switching port (13) and the indoor air inlet (11); when the switching port (13) is used for introducing fresh air, the two first connecting ports (431) are respectively arranged opposite to the two second connecting ports (441) to respectively form the switching port (13) and the fresh air outlet (12).

11. An air conditioner indoor unit, characterized in that: The air conditioner indoor unit includes the fresh air device according to any one of claims 1 to 10.

Images