Fresh air switching device, its control method, and air conditioner

Abstract

The present application provides a fresh air switching device, a control method thereof, and an air conditioner. The fresh air switching device includes a fresh air device and a switching device. The fresh air device includes a first air duct and a second air duct that are isolated from each other. The first air duct includes a first air inlet and a first air outlet, and the second air duct includes a second air inlet and a second air outlet. The switching device includes a first interface, a second interface, a third interface, a fourth interface, a first communication port, a second communication port, a third communication port, a fourth communication port, and a switching mechanism. The first interface is communicated with the first air inlet, the second interface is communicated with the first air outlet, the third interface is communicated with the second air inlet, the fourth interface is communicated with the second air outlet, and the switching mechanism is used to adjust the communication state between the interfaces and the communication ports of the switching device. According to the fresh air switching device of the present application, different ventilation modes can be correspondingly adjusted according to different degrees of air turbidity, improving the user experience.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning, and particularly relates to a fresh air switching device, a control method thereof, and an air conditioner. Background Art

[0002] With the improvement of consumers' living standards, the diversity of air conditioners has gradually become more extensive. Existing air conditioners are generally used in a closed space with an internal circulation, resulting in the indoor air not being ventilated, and the turbidity of the air increasing. The fresh air function is crucial for the diversification of air conditioners. Currently, most fresh air ventilation modes are single, affecting the user experience. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present application is to provide a fresh air switching device, a control method thereof, and an air conditioner, which can adjust different ventilation modes according to different degrees of air turbidity, improving the user experience.

[0004] To solve the above problems, the present application provides a fresh air switching device, including a fresh air device and a switching device. The fresh air device includes a first air duct and a second air duct that are isolated from each other. The first air duct includes a first air inlet and a first air outlet, and the second air duct includes a second air inlet and a second air outlet. The switching device includes a first interface, a second interface, a third interface, a fourth interface, a first communication port, a second communication port, a third communication port, a fourth communication port, and a switching mechanism. The first interface is communicated with the first air inlet, the second interface is communicated with the first air outlet, the third interface is communicated with the second air inlet, the fourth interface is communicated with the second air outlet. The first communication port and the second communication port are communicated with the indoor side, and the third communication port and the fourth communication port are communicated with the outdoor side. The interfaces and the communication ports correspond one by one. The switching mechanism is used to adjust the communication state between the interfaces and the communication ports of the switching device.

[0005] Preferably, the switching device further includes a fan interface board and a duct interface box. The first interface, the second interface, the third interface, and the fourth interface are arranged on the fan interface board, and the first communication port, the second communication port, the third communication port, and the fourth communication port are arranged on the duct interface box. The switching mechanism is connected between the fan interface board and the duct interface box and can move relative to the fan interface board and the duct interface box to adjust the communication state between the interfaces and the communication ports.

[0006] Preferably, the switching mechanism includes an inner cylinder, an outer cylinder, and a connecting pipe connected between the inner cylinder and the outer cylinder. The connecting pipe includes at least two groups, and each group of connecting pipes corresponds to a different combination of interface and communication port communication.

[0007] Preferably, the connecting pipes of the same group are located at the same axial position and are arranged at intervals in the circumferential direction. When the first end positions of the connecting pipes of the same group correspond to the interfaces one by one, the second end positions correspond to the communication ports one by one.

[0008] Preferably, the connecting pipes of different groups are arranged at intervals along the axial direction of the switching mechanism.

[0009] Preferably, the connecting pipes of different groups are arranged staggeredly in the circumferential direction.

[0010] Preferably, there are three groups of connecting pipes. The first group of connecting pipes is a straight pipe and extends along the radial direction of the switching mechanism. The second group of connecting pipes is a bent pipe and bends in the clockwise direction. The third group of connecting pipes is a bent pipe and bends in the counterclockwise direction. The first end of the second group of connecting pipes is located on the first side of the first group of connecting pipes, and the second end is located on the second side of the first group of connecting pipes. The first end of the third group of connecting pipes is located on the second side of the first group of connecting pipes, and the second end is located on the first side of the first connecting pipe.

[0011] Preferably, the fresh air switching device includes three modes. The first mode is the one-in-one-out mode of fresh air and dirty air. The second mode is the two-in mode of fresh air. The third mode is the two-out mode of dirty air.

[0012] When the fresh air switching device is in the one-in-one-out mode of fresh air and dirty air, the first air inlet is communicated with the fourth communication port, the first air outlet is communicated with the second communication port, the second air inlet is communicated with the first communication port, and the second air outlet is communicated with the third communication port.

[0013] When the fresh air switching device is in the two-in mode of fresh air, the first air inlet is communicated with the third communication port, the first air outlet is communicated with the first communication port, the second air inlet is communicated with the fourth communication port, and the second air outlet is communicated with the second communication port.

[0014] When the fresh air switching device is in the two-out mode of dirty air, the first air inlet is communicated with the first communication port, the first air outlet is communicated with the third communication port, the second air inlet is communicated with the second communication port, and the second air outlet is communicated with the fourth communication port.

[0015] Preferably, one end of the fan interface board is provided with a distribution shaft, the air duct interface box is provided with a distribution cavity, the outer cylinder of the switching mechanism is installed in the distribution cavity, the distribution shaft is installed in the inner cylinder of the switching mechanism, and the switching mechanism can rotate relative to the fan interface board and the air duct interface box simultaneously.

[0016] Preferably, the outer wall of the distribution shaft is provided with a first communication groove, the inner wall of the distribution cavity is provided with a second communication groove, the interfaces are in one-to-one correspondence and communication with the first communication groove, the second communication groove is in one-to-one correspondence and communication with the communication ports, and the connecting pipes of the switching mechanism can selectively communicate with the first communication groove and the second communication groove.

[0017] Preferably, both the first communication groove and the second communication groove are strip-shaped grooves.

[0018] Preferably, a first fan is provided in the first air duct, and a second fan is provided in the second air duct. The first fan is located between the first air inlet and the first air outlet, and the second fan is located between the second air inlet and the second air outlet.

[0019] Preferably, the fresh air switching device further includes a housing and a cover plate. The housing includes an upper cavity and a lower cavity. The fresh air device is installed in the lower cavity, and the switching device is installed in the upper cavity. The cover plate covers the opening of the housing.

[0020] According to another aspect of the present application, an air conditioner is provided, including a fresh air switching device, and the fresh air switching device is the above-mentioned fresh air switching device.

[0021] According to another aspect of the present application, a control method for the above-mentioned fresh air switching device is provided, including:

[0022] Obtain the working mode of the fresh air switching device;

[0023] Adjust the switching mechanism according to the working mode of the fresh air switching device, and adjust the working mode of the fresh air switching device by adjusting the communication state between the interface and the communication port of the switching device.

[0024] Preferably, the step of adjusting the switching mechanism according to the working mode of the fresh air switching device includes:

[0025] When the fresh air switching device is in the fresh air and dirty air one-in-one-out mode, control the first air inlet to communicate with the fourth communication port, the first air outlet to communicate with the second communication port, the second air inlet to communicate with the first communication port, and the second air outlet to communicate with the third communication port;

[0026] When the fresh air switching device is in the fresh air two-in mode, control the first air inlet to communicate with the third communication port, the first air outlet to communicate with the first communication port, the second air inlet to communicate with the fourth communication port, and the second air outlet to communicate with the second communication port;

[0027] When the fresh air switching device is in the dirty air two-out mode, control the first air inlet to communicate with the first communication port, the first air outlet to communicate with the third communication port, the second air inlet to communicate with the second communication port, and the second air outlet to communicate with the fourth communication port.

[0028] The fresh air switching device provided by this application includes a fresh air device and a switching device. The fresh air device includes a first air duct and a second air duct that are isolated from each other. The first air duct includes a first air inlet and a first air outlet, and the second air duct includes a second air inlet and a second air outlet. The switching device includes a first interface, a second interface, a third interface, a fourth interface, a first communication port, a second communication port, a third communication port, a fourth communication port, and a switching mechanism. The first interface is connected to the first air inlet, the second interface is connected to the first air outlet, the third interface is connected to the second air inlet, the fourth interface is connected to the second air outlet. The first communication port and the second communication port are connected to the indoor side, and the third communication port and the fourth communication port are connected to the outdoor side. The interfaces and the communication ports correspond one by one. The switching mechanism is used to adjust the connection state between the interfaces and the communication ports of the switching device. The fresh air switching device of this application cooperatively connects the fresh air device and the switching device, uses the fresh air device to extract indoor and outdoor air, and uses the switching device to adjust the connection state of the fresh air device, so that different ventilation modes can be correspondingly adjusted according to the different degrees of air turbidity, improving the user experience. Description of the Drawings

[0029] Figure 1 Internal structure diagram of the fresh air switching device according to an embodiment of this application;

[0030] Figure 2 Exploded structure diagram of the fresh air switching device according to an embodiment of this application;

[0031] Figure 3 Exploded structure diagram of the fresh air device of the fresh air switching device according to an embodiment of this application;

[0032] Figure 4 First exploded structure diagram of the switching device of the fresh air switching device according to an embodiment of this application;

[0033] Figure 5 Second exploded structure diagram of the switching device of the fresh air switching device according to an embodiment of this application;

[0034] Figure 6 Three-dimensional structure diagram of the fresh air device of the fresh air switching device according to an embodiment of this application;

[0035] Figure 7 Internal structure diagram of the fresh air device of the fresh air switching device according to an embodiment of this application;

[0036] Figure 8 Structure diagram of the switching device when the fresh air switching device according to an embodiment of this application is in the fresh air and dirty air one-in-one-out mode;

[0037] Figure 9 Structure diagram of the switching device when the fresh air switching device according to an embodiment of this application is in the fresh air two-in mode;

[0038] Figure 10 Structural diagram of the switching device when the fresh air switching device of an embodiment of the present application is in the mode of discharging dirty air through two outlets;

[0039] Figure 11 Control schematic diagram of the fresh air switching device of an embodiment of the present application;

[0040] Figure 12 Control flowchart of the fresh air switching device of an embodiment of the present application.

[0041] The reference numerals are shown as:

[0042] 1. First interface; 2. Second interface; 3. Third interface; 4. Fourth interface; 5. First communication port; 6. Second communication port; 7. Third communication port; 8. Fourth communication port; 9. Fan interface board; 10. Air duct interface box; 11. Inner cylinder; 12. Outer cylinder; 13. Connecting pipe; 14. Distribution shaft; 15. Distribution cavity; 16. First communication groove; 17. Second communication groove; 18. First fan; 19. Second fan; 20. Housing; 21. Cover plate; 22. Fresh air device; 23. Switching device; 24. Air duct cover plate; 25. First air duct; 26. Partition; 27. Second air duct; 28. Filter screen cover plate; 29. Filter screen; 30. Adapter; A1. First air inlet; A2. First air outlet; B1. Second air inlet; B2. Second air outlet. Detailed implementation manners

[0043] With reference to Figures 1 to 10 As shown, according to the embodiment of the present application, the fresh air switching device includes a fresh air device 22 and a switching device 23. The fresh air device 22 includes a first air duct 25 and a second air duct 27 that are isolated from each other. The first air duct 25 includes a first air inlet A1 and a first air outlet A2, and the second air duct 27 includes a second air inlet B1 and a second air outlet B2. The switching device 23 includes a first interface 1, a second interface 2, a third interface 3, a fourth interface 4, a first communication port 5, a second communication port 6, a third communication port 7, a fourth communication port 8, and a switching mechanism. The first interface 1 is communicated with the first air inlet A1, the second interface 2 is communicated with the first air outlet A2, the third interface 3 is communicated with the second air inlet B1, the fourth interface 4 is communicated with the second air outlet B2. The first communication port 5 and the second communication port 6 are communicated with the indoor side, and the third communication port 7 and the fourth communication port 8 are communicated with the outdoor side. The interfaces and the communication ports correspond one by one. The switching mechanism is used to adjust the communication state between the interfaces and the communication ports of the switching device 23.

[0044] The fresh air switching device of the present application connects the fresh air device 22 and the switching device 23 in cooperation so that the two can be used in combination. The fresh air device 22 is used to extract indoor and outdoor air, and the switching device 23 is used to adjust the connection state of the fresh air device 22, so that different ventilation modes can be correspondingly adjusted according to the different degrees of air turbidity, improving the user experience.

[0045] The fresh air device 22 includes an air duct cover plate 24, a first air duct 25, a partition 26, a first fan 18, a second fan 19, a second air duct 27, a filter screen cover plate 28 and a filter screen 29. The air inlets and outlets of the first air duct 25 and the second air duct 27 are both arranged at the top of the fresh air device 2, so that a plurality of connection air outlets are formed at the top of the fresh air device. The connection air outlets are connected to the switching device 23 through an adapter 30.

[0046] In the fresh air device 22 of this embodiment, the first fan 18 and the second fan 19 are respectively located on both sides of the partition 26. The first air duct 25 and the second air duct 27 are isolated from each other. The first air duct 25 is located on the first side of the fresh air device 22, and the second air duct 27 is located on the second side of the fresh air device 22.

[0047] The fresh air device 22 is connected to the switching device 23 through the adapter 30. In order to facilitate the connection between the fresh air device 22 and the switching device 23, the adapter 30 can be adjusted to the required state as needed, such as an end-to-end arrangement state, or one end in an end-to-end arrangement and the other end in a side-by-side arrangement. One end of the adapter 30 needs to be adapted to the positions of the respective air outlets of the fresh air device 22, and the other end needs to be adapted to the positions of the connection interfaces of the switching device 23. When designing the adapter 30, the form of the adapter 30 can be designed as needed.

[0048] In the first air duct 25, air goes down from the first air inlet A1, goes backward after reaching the bottom, filters out some impurities through the filter screen, then enters the first air duct 25, and finally is sent out from the first air outlet A2.

[0049] In the second air duct 27, air goes down from the second air inlet B1, goes forward after reaching the bottom, enters the second air duct 27, and finally is sent out from the second air outlet B2.

[0050] The switching device 23 further includes a fan interface board 9 and an air duct interface box 10. The first interface 1, the second interface 2, the third interface 3 and the fourth interface 4 are arranged on the fan interface board 9. The first communication port 5, the second communication port 6, the third communication port 7 and the fourth communication port 8 are arranged on the air duct interface box 10. The switching mechanism is connected between the fan interface board 9 and the air duct interface box 10 and can move relative to the fan interface board 9 and the air duct interface box 10 to adjust the connection state of the interfaces and the communication ports.

[0051] In this embodiment, the fan interface board 9 and the air duct interface box 10 are relatively fixed, and the four interfaces on the fan interface board 9 are fixedly connected to the air inlet and outlet on the fresh air device 22. The four interfaces on the fan interface board 9 and the four communication ports on the air duct interface box 10 are connected through a switching mechanism. Therefore, by adjusting the position of the switching mechanism, different connection states between the four interfaces and the four communication ports can be achieved, and thus the switching of different working modes can be realized.

[0052] The switching mechanism includes an inner cylinder 11, an outer cylinder 12, and a connecting pipe 13 connected between the inner cylinder 11 and the outer cylinder 12. The connecting pipe 13 includes at least two groups, and each group of connecting pipes 13 corresponds to a different combination of interface and communication port connection. The inner cylinder 11 and the outer cylinder 12 of the switching mechanism are concentrically arranged and are connected by the connecting pipe 13. The connecting pipe 13 includes at least two groups, and the connection positions of each group of connecting pipes 13 on the inner cylinder 11 and the outer cylinder 12 are different. A preset angle is formed between the connection positions of one group of connecting pipes 13 on the inner cylinder 11 and the outer cylinder 12 and the connection positions of other groups of connecting pipes 13 on the inner cylinder 11 and the outer cylinder 12. Thus, one group of connecting pipes 13 can connect each interface to a corresponding communication port, and the other group of connecting pipes 13 can connect the interface to another communication port. Since the interfaces and communication ports connected by different connecting pipes are different, the connection states of the air inlet and outlet of the fresh air device with the indoor and outdoor are also different, thereby realizing the adjustment of multiple different working modes.

[0053] In this embodiment, a cylindrical structure formed by the cooperation of the inner cylinder 11 and the outer cylinder 12 is used to adjust the connection state, and the adjustment can be performed by rotating the switching mechanism. Therefore, it is not only simple in structure but also easy to implement.

[0054] In this embodiment, one end of the inner cylinder 11 and the outer cylinder 12 is open, and the other end is connected by a connecting plate. The connecting plate can provide the connection function between the inner cylinder 11 and the outer cylinder 12, so that the connecting pipe 13 only needs to provide the function of pipeline connection and does not need to provide connection force, which can improve the stability and reliability of the overall structure of the switching mechanism.

[0055] The connecting pipes 13 in the same group are located at the same axial position and are arranged at intervals in the circumferential direction. When the first end positions of the connecting pipes 13 in the same group correspond to the interfaces one by one, the second end positions correspond to the communication ports one by one, which can ensure that during the switching process, no matter which group of connecting pipes 13 rotates to the connection position, the corresponding relationship between the connecting pipes 13 and the interfaces and communication ports can be ensured.

[0056] In one embodiment, different groups of connecting pipes 13 are arranged at intervals along the axial direction of the switching mechanism, so as to avoid the concentration of the connecting pipes 13, facilitate the layout and setting of the connecting pipes 13, avoid the interference problem between the connecting pipes 13, reduce the setting difficulty of the connecting pipes 13, and improve the assembly efficiency.

[0057] In one embodiment, when the diameter of the inner cylinder 11 is large enough and can be distributed in the circumferential direction, all the connecting pipes 13 can also be arranged at the same axial position.

[0058] Different groups of connecting pipes 13 are arranged in a staggered manner in the circumferential direction, which is more convenient for the arrangement of the connecting pipes 13.

[0059] There are three groups of connecting pipes 13. The first group of connecting pipes 13 is a straight pipe and extends along the radial direction of the switching mechanism. The second group of connecting pipes 13 is a bent pipe and bends in the clockwise direction. The third group of connecting pipes 13 is a bent pipe and bends in the counterclockwise direction. The first end of the second group of connecting pipes 13 is located on the first side of the first group of connecting pipes 13, and the second end is located on the second side of the first group of connecting pipes 13. The first end of the third group of connecting pipes 13 is located on the second side of the first group of connecting pipes 13, and the second end is located on the first side of the first connecting pipe 13.

[0060] By bending the other two groups of connecting pipes 13, the second group of connecting pipes 13 can be bent in the clockwise direction relative to the first group of connecting pipes 13. When the second group of connecting pipes 13 and the first group of connecting pipes 13 are connected to the same interface, the communication port connected by the second group of connecting pipes 13 is displaced one position in the clockwise direction relative to the communication port connected by the first group of connecting pipes 13. Thus, the interfaces of the first group of connecting pipes 13 and the second group of connecting pipes 13 are connected to different communication ports, realizing the switching of the communication state between the interfaces and communication ports of the switching device 23. The principle of the third group of connecting pipes 13 is similar to that of the second group of connecting pipes 13. The difference is that the third group of connecting pipes 13 is bent counterclockwise relative to the first group of connecting pipes 13, so another communication state can be realized relative to the first group of connecting pipes 13.

[0061] The fresh air switching device includes three modes. The first mode is the one-in-one-out mode of fresh air and dirty air. The second mode is the two-in mode of fresh air. The third mode is the two-out mode of dirty air.

[0062] When the fresh air switching device is in the one-in-one-out mode of fresh air and dirty air, the first air inlet A1 is connected to the fourth communication port 8, the first air outlet A2 is connected to the second communication port 6, the second air inlet B1 is connected to the first communication port 5, and the second air outlet B2 is connected to the third communication port 7.

[0063] When the fresh air switching device is in the fresh air two-in mode, the first air inlet A1 is connected to the third communication port 7, the first air outlet A2 is connected to the first communication port 5, the second air inlet B1 is connected to the fourth communication port 8, and the second air outlet B2 is connected to the second communication port 6;

[0064] When the fresh air switching device is in the dirty air two-out mode, the first air inlet A1 is connected to the first communication port 5, the first air outlet A2 is connected to the third communication port 7, the second air inlet B1 is connected to the second communication port 6, and the second air outlet B2 is connected to the fourth communication port 8.

[0065] One end of the fan interface board 9 is provided with a distribution shaft 14, the air duct interface box 10 is provided with a distribution cavity 15, the outer cylinder 12 of the switching mechanism is installed in the distribution cavity 15, the distribution shaft 14 is installed in the inner cylinder 11 of the switching mechanism, and the switching mechanism can rotate relative to the fan interface board 9 and the air duct interface box 10 simultaneously.

[0066] The outer wall of the distribution shaft 14 is provided with a first communication groove 16, the inner wall of the distribution cavity 15 is provided with a second communication groove 17, the interfaces are connected to the first communication groove 16 in one-to-one correspondence, the second communication groove 17 is connected to the communication ports in one-to-one correspondence, and the connecting pipe 13 of the switching mechanism can selectively communicate with the first communication groove 16 and the second communication groove 17.

[0067] Both the first communication groove 16 and the second communication groove 17 are strip-shaped grooves.

[0068] The extension lengths of the first communication groove 16 and the second communication groove 17 in the axial direction of the inner cylinder 11 should cover the total layout length of each group of connecting pipes 13 in the axial direction of the inner cylinder 11, so that when each connecting pipe reaches the communication position, it can smoothly communicate with the first communication groove 16 and the second communication groove 17.

[0069] A first fan 18 is arranged in the first air duct 25, a second fan 19 is arranged in the second air duct 27, the first fan 18 is located between the first air inlet A1 and the first air outlet A2, and the second fan 19 is located between the second air inlet B1 and the second air outlet B2.

[0070] The fresh air switching device further includes a housing 20 and a cover plate 21. The housing 20 includes an upper cavity and a lower cavity. The fresh air device 22 is installed in the lower cavity, the switching device 23 is installed in the upper cavity, and the cover plate covers the opening of the housing 20.

[0071] By adding the housing 20 and the cover plate 21 in this application, the fresh air device 22 and the switching device 23 located in the housing 20 can be protected. A support plate is arranged in the housing 20. The support plate divides the inner cavity of the housing 20 into an upper cavity and a lower cavity, and can realize the installation and fixation of the switching device 23, so as to facilitate the connection between the fresh air device 22 and the switching device 23.

[0072] The rotation adjustment of the switching mechanism of the switching device 23 can be achieved by a stepper motor, and the stepper motor can be fixedly installed on the air duct interface box 10.

[0073] According to an embodiment of the present application, the air conditioner includes a fresh air switching device, and the fresh air switching device is the above-mentioned fresh air switching device.

[0074] Referring to Figure 11 and Figure 12 As shown, according to an embodiment of the present application, the control method of the above-mentioned fresh air switching device includes: obtaining the working mode of the fresh air switching device; adjusting the switching mechanism according to the working mode of the fresh air switching device, and adjusting the working mode of the fresh air switching device by adjusting the connection state between the interface and the communication port of the switching device 23.

[0075] The step of adjusting the switching mechanism according to the working mode of the fresh air switching device includes: when the fresh air switching device is in the fresh air and dirty air one-in-one-out mode, controlling the first air inlet A1 to communicate with the fourth communication port 8, the first air outlet A2 to communicate with the second communication port 6, the second air inlet B1 to communicate with the first communication port 5, and the second air outlet B2 to communicate with the third communication port 7; when the fresh air switching device is in the fresh air two-in mode, controlling the first air inlet A1 to communicate with the third communication port 7, the first air outlet A2 to communicate with the first communication port 5, the second air inlet B1 to communicate with the fourth communication port 8, and the second air outlet B2 to communicate with the second communication port 6; when the fresh air switching device is in the dirty air two-out mode, controlling the first air inlet A1 to communicate with the first communication port 5, the first air outlet A2 to communicate with the third communication port 7, the second air inlet B1 to communicate with the second communication port 6, and the second air outlet B2 to communicate with the fourth communication port 8.

[0076] When the fresh air switching device is in the fresh air and dirty air one-in-one-out mode, the first air inlet A1 communicates with the outdoor side through the fourth communication port 8, the first air outlet A2 communicates with the indoor side through the second communication port 6, the second air inlet B1 communicates with the indoor side through the first communication port 5, and the second air outlet B2 communicates with the outdoor side through the third communication port 7. At this time, outdoor fresh air can enter the first air inlet A1 through the fourth communication port 8 via the connecting pipe 13, then flow out from the first air outlet A2 after passing through the first fan 18, enter the room through the connecting pipe 13 from the second communication port 6, and send fresh air into the room. Indoor dirty air can enter the second air inlet B1 from the indoor side through the first communication port 5 and the connecting pipe 13, then flow out from the second air outlet B2 after passing through the second fan 19, enter the connecting pipe 13, and then discharge the dirty air in the room to the outdoor through the third communication port 7.

[0077] When the fresh air switching device is in the fresh air two-in mode, the first air inlet A1 is communicated with the outdoor side through the third communication port 7, the first air outlet A2 is communicated with the indoor side through the first communication port 5, the second air inlet B1 is communicated with the outdoor side through the fourth communication port 8, and the second air outlet B2 is communicated with the indoor side through the second communication port 6. At this time, outdoor fresh air can enter the first air inlet A1 through the third communication port 7 via the connecting pipe 13, then flow out from the first air outlet A2 after passing through the first fan 18, enter the room through the connecting pipe 13 from the first communication port 5, and send fresh air into the room. At the same time, it can also enter the second air inlet B1 from the outdoor side through the fourth communication port 8 and the connecting pipe 13, then enter the connecting pipe 13 from the second air outlet B2 after passing through the second fan 19, and then send fresh air into the room from the second communication port 6.

[0078] When the fresh air switching device is in the dirty air two-out mode, the first air inlet A1 is communicated with the indoor side through the first communication port 5, the first air outlet A2 is communicated with the outdoor side through the third communication port 7, the second air inlet B1 is communicated with the indoor side through the second communication port 6, and the second air outlet B2 is communicated with the outdoor side through the fourth communication port 8. At this time, indoor dirty air can enter the first air inlet A1 through the first communication port 5 via the connecting pipe 13, then flow out from the first air outlet A2 after passing through the first fan 18, and discharge the dirty air in the room to the outdoor through the connecting pipe 13 from the third communication port 7. It can also enter the second air inlet B1 from the indoor side through the second communication port 6 and the connecting pipe 13, then enter the connecting pipe 13 from the second air outlet B2 after passing through the second fan 19, and then discharge the dirty air in the room to the outdoor from the fourth communication port 8.

[0079] It is easy for those skilled in the art to understand that, on the premise of no conflict, the above advantageous ways can be freely combined and superimposed.

[0080] The above are only the preferred embodiments of the present application, and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application. The above is only the preferred implementation manner of the present application. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present application, several improvements and modifications can still be made, and these improvements and modifications should also be regarded as the protection scope of the present application.

Claims

1. A fresh air switching device, characterized in that, It includes a fresh air device (22) and a switching device (23). The fresh air device (22) includes a first air duct (25) and a second air duct (27) that are isolated from each other. The first air duct (25) includes a first air inlet (A1) and a first air outlet (A2). The second air duct (27) includes a second air inlet (B1) and a second air outlet (B2). The switching device (23) includes a first interface (1), a second interface (2), a third interface (3), a fourth interface (4), a first communication port (5), a second communication port (6), a third communication port (7), a fourth communication port (8) and a switching mechanism. The first interface (1) is communicated with the first air inlet (A1). The second interface (2) is communicated with the first air outlet (A2). The third interface (3) is communicated with the second air inlet (B1). The fourth interface (4) is communicated with the second air outlet (B2). The first communication port (5) and the second communication port (6) are communicated with the indoor side. The third communication port (7) and the fourth communication port (8) are communicated with the outdoor side. The interfaces and the communication ports correspond to each other one by one. The switching mechanism is rotatably arranged in the switching device (23). The switching mechanism is used to adjust the communication state between the interfaces and the communication ports of the switching device (23), so that there are two air flows flowing to the same side or flowing to both sides respectively in the switching device (23). The switching device (23) further includes a fan interface board (9) and an air duct interface box (10). The first interface (1), the second interface (2), the third interface (3) and the fourth interface (4) are arranged on the fan interface board (9). The first communication port (5), the second communication port (6), the third communication port (7) and the fourth communication port (8) are arranged on the air duct interface box (10). The switching mechanism is connected between the fan interface board (9) and the air duct interface box (10), and can move relative to the fan interface board (9) and the air duct interface box (10) to realize the adjustment of the communication state between the interfaces and the communication ports. The switching mechanism includes an inner cylinder (11), an outer cylinder (12) and a connecting pipe (13) connected between the inner cylinder (11) and the outer cylinder (12). The connecting pipe (13) includes at least two groups, and each group of the connecting pipe (13) corresponds to a different combination of interface and communication port communication.

2. The fresh air switching device according to claim 1, wherein, The connecting pipes (13) of the same group are located at the same axial position and are arranged at intervals in the circumferential direction. When the first end positions of the connecting pipes (13) of the same group correspond to the interfaces one by one, the second end positions correspond to the communication ports one by one.

3. The fresh air switching device according to claim 2, characterized in that, The connecting pipes (13) of different groups are arranged at intervals along the axis of the switching mechanism.

4. The fresh air switching device according to claim 2, wherein The connecting pipes (13) of different groups are arranged in a staggered manner in the circumferential direction.

5. The fresh air switching device according to claim 1, characterized in that, The connecting pipes (13) are divided into three groups. The first group of the connecting pipes (13) is a straight pipe and extends along the radial direction of the switching mechanism. The second group of the connecting pipes (13) is a bent pipe and is bent in the clockwise direction. The third group of the connecting pipes (13) is a bent pipe and is bent in the counterclockwise direction. The first end of the second group of the connecting pipes (13) is located on the first side of the first group of the connecting pipes (13), and the second end is located on the second side of the first group of the connecting pipes (13). The first end of the third group of the connecting pipes (13) is located on the second side of the first group of the connecting pipes (13), and the second end is located on the first side of the first group of the connecting pipes (13).

6. The fresh air switching device according to claim 5, wherein The fresh air switching device includes three modes. The first mode is the one-in-one-out mode of fresh air and dirty air. The second mode is the two-in mode of fresh air. The third mode is the two-out mode of dirty air. When the fresh air switching device is in the one-in-one-out mode of fresh air and dirty air, the first air inlet (A1) is communicated with the fourth communication port (8), the first air outlet (A2) is communicated with the second communication port (6), the second air inlet (B1) is communicated with the first communication port (5), and the second air outlet (B2) is communicated with the third communication port (7). When the fresh air switching device is in the two-in mode of fresh air, the first air inlet (A1) is communicated with the third communication port (7), the first air outlet (A2) is communicated with the first communication port (5), the second air inlet (B1) is communicated with the fourth communication port (8), and the second air outlet (B2) is communicated with the second communication port (6). When the fresh air switching device is in the two-out mode of dirty air, the first air inlet (A1) is communicated with the first communication port (5), the first air outlet (A2) is communicated with the third communication port (7), the second air inlet (B1) is communicated with the second communication port (6), and the second air outlet (B2) is communicated with the fourth communication port (8).

7. The fresh air switching device according to claim 1, wherein One end of the fan interface board (9) is provided with a distribution shaft (14). A distribution cavity (15) is provided on the air duct interface box (10). The outer cylinder (12) of the switching mechanism is installed in the distribution cavity (15). The distribution shaft (14) is installed in the inner cylinder (11) of the switching mechanism. The switching mechanism can rotate relative to the fan interface board (9) and the air duct interface box (10) simultaneously.

8. The fresh air switching device according to claim 7, characterized in that, A first communication groove (16) is provided on the outer wall of the distribution shaft (14). A second communication groove (17) is provided on the inner wall of the distribution cavity (15). The interfaces are communicated with the first communication groove (16) in one-to-one correspondence. The second communication groove (17) is communicated with the communication ports in one-to-one correspondence. The connecting pipes (13) of the switching mechanism can selectively communicate with the first communication groove (16) and the second communication groove (17).

9. The fresh air switching device according to claim 8, characterized in that Both the first communication groove (16) and the second communication groove (17) are strip-shaped grooves.

10. The fresh air switching device according to claim 1, characterized in that, A first fan (18) is arranged in the first air duct (25), and a second fan (19) is arranged in the second air duct (27). The first fan (18) is located between the first air inlet (A1) and the first air outlet (A2), and the second fan (19) is located between the second air inlet (B1) and the second air outlet (B2).

11. The fresh air switching device according to claim 1, characterized in that, The fresh air switching device further includes a housing (20) and a cover plate (21). The housing (20) includes an upper cavity and a lower cavity. The fresh air device (22) is installed in the lower cavity, and the switching device (23) is installed in the upper cavity. The cover plate covers the opening of the housing (20).

12. An air conditioner, comprising a fresh air switching device, characterized in that, The fresh air switching device is the fresh air switching device according to any one of claims 1 to 11.

13. A control method for a fresh air switching device according to any one of claims 1 to 11, characterized in that, Including: Obtain the working mode of the fresh air switching device; Adjust the switching mechanism according to the working mode of the fresh air switching device, and adjust the working mode of the fresh air switching device by adjusting the communication state between the interface of the switching device (23) and the communication port.

14. The control method according to claim 13, wherein The step of adjusting the switching mechanism according to the working mode of the fresh air switching device includes: When the fresh air switching device is in the fresh air and dirty air one-in-one-out mode, the first air inlet (A1) is communicated with the fourth communication port (8), the first air outlet (A2) is communicated with the second communication port (6), the second air inlet (B1) is communicated with the first communication port (5), and the second air outlet (B2) is communicated with the third communication port (7); When the fresh air switching device is in the fresh air two-in mode, the first air inlet (A1) is communicated with the third communication port (7), the first air outlet (A2) is communicated with the first communication port (5), the second air inlet (B1) is communicated with the fourth communication port (8), and the second air outlet (B2) is communicated with the second communication port (6); When the fresh air switching device is in the dirty air two-out mode, the first air inlet (A1) is communicated with the first communication port (5), the first air outlet (A2) is communicated with the third communication port (7), the second air inlet (B1) is communicated with the second communication port (6), and the second air outlet (B2) is communicated with the fourth communication port (8).

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