Fresh air device, air conditioner and control method thereof

Abstract

The present invention provides a fresh air device, an air conditioner and a control method thereof. The fresh air device includes a device housing, and a fresh air outlet pipe is provided on the device housing. The fresh air outlet pipe has a first fresh air outlet facing a first preset side of the air conditioner and a second fresh air outlet facing a second preset side of the air conditioner. Any one of the first fresh air outlet and the second fresh air outlet can be controlled to be conducted or cut off. According to the present invention, the first fresh air outlet and the second fresh air outlet are respectively arranged facing different sides of the air conditioner, and the first fresh air outlet and the second fresh air outlet can be controlled to be conducted or cut off, so that the fresh air outlet direction of the fresh air device can be controlled to be discharged towards a preset direction, effectively preventing the user from being directly blown by the fresh air when the user is at the preset side of the air conditioner, thereby improving the user comfort.

Description

Technical Field

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

[0002] At present, the air quality is getting worse and worse. When users use air conditioners, they pay more and more attention to the air quality in the room. Air conditioners with fresh air functions gradually appear on the market. At present, the fresh air function of air conditioners on the market mainly realizes the intake of outdoor fresh air into the room and the discharge of indoor polluted air to the outside. The fresh air outlet direction of the fresh air device is single and fixed. When the user is in front of the air conditioner, the fresh air outlet may directly face the user, bringing discomfort to the user. Summary of the Invention

[0003] Therefore, the present invention provides a fresh air device, an air conditioner and a control method thereof to overcome the deficiency that the fresh air outlet direction of the fresh air device in the prior art is single and brings discomfort to the user.

[0004] To solve the above problems, the present invention provides a fresh air device, including a device housing. The device housing is provided with a fresh air delivery pipe, and the fresh air delivery pipe has a first fresh air outlet facing a first preset side of the air conditioner and a second fresh air outlet facing a second preset side of the air conditioner. Any one of the first fresh air outlet and the second fresh air outlet can be controlled to be conducted or cut off.

[0005] Preferably, the first preset side is the air outlet side of the air conditioner under the operating condition, and / or the second preset side is the air inlet side of the air conditioner under the operating condition.

[0006] Preferably, the air inlet side is provided with an air inlet, and a heat exchanger is arranged inside the air inlet. The second fresh air outlet is on the air inlet side of the heat exchanger; and / or the air outlet side is provided with an air outlet, and an air outlet duct is arranged inside the air outlet. The first fresh air outlet communicates with the air outlet duct.

[0007] Preferably, a flow path switching damper is arranged in the fresh air delivery pipe. The flow path switching damper has a first position where both the first fresh air outlet and the second fresh air outlet are cut off, a second position where the first fresh air outlet is conducted and the second fresh air outlet is cut off, and a third position where the first fresh air outlet is cut off and the second fresh air outlet is conducted. The flow path switching damper can be controlled to switch between the first position, the second position and the third position.

[0008] Preferably, the fresh air outlet pipe has a first branch pipe section, a second branch pipe section, and a main pipe section. The inlet ends of the first branch pipe section and the second branch pipe section are connected together at the main pipe section, and the first branch pipe section is perpendicular to the second branch pipe section. The first fresh air outlet is formed on the first branch pipe section, and the second fresh air outlet is formed on the second branch pipe section. The flow path switching damper includes a first door panel and a second door panel that are perpendicularly connected to each other. When the flow path switching damper is in the first position, the first door panel cuts off the flow path of the first branch pipe section, and the second door panel cuts off the flow path of the second branch pipe section.

[0009] Preferably, one end of the second branch pipe section away from the main pipe section is a branch structure, and there are multiple second fresh air outlets. Each of the multiple second fresh air outlets is respectively formed at the end of each branch of the branch structure.

[0010] Preferably, the fresh air device further includes a damper switching motor for driving the flow path switching damper to switch between the first position, the second position, and the third position.

[0011] Preferably, a human body sensing device is provided on the first preset side of the air conditioner, and the human body sensing device can sense whether there is a person near the first preset side of the air conditioner.

[0012] Preferably, a fresh air driving chamber and a dirty air driving chamber are formed inside the device housing. The fresh air driving chamber and the dirty air driving chamber are independent of each other. The fresh air driving chamber has a fresh air inlet and a fresh air outlet, and the fresh air outlet is communicated with the inlet of the fresh air outlet pipe. A first air blade is provided in the fresh air driving chamber. The dirty air driving chamber has a dirty air inlet and a dirty air outlet, and a second air blade is provided in the dirty air driving chamber.

[0013] Preferably, the fresh air inlet corresponds to a fresh air inlet pipe, and the dirty air outlet corresponds to a dirty air outlet pipe. A first damper is provided at the fresh air inlet pipe and the dirty air outlet pipe. The first damper has a communicating position for communicating the fresh air inlet pipe with the fresh air driving chamber and the dirty air outlet pipe with the dirty air driving chamber, and a cutoff position for cutting off the fresh air inlet pipe from the fresh air driving chamber and the dirty air outlet pipe from the dirty air driving chamber.

[0014] Preferably, the first damper includes a damper plate body. A first flow hole corresponding to the fresh air inlet pipe is formed on the damper plate body, and a second flow hole corresponding to the dirty air outlet pipe is further formed on the damper plate body. The damper plate body can rotate around its geometric central axis to realize the switching of the first damper between the communicating position and the cutoff position.

[0015] The present invention also provides an air conditioner, including a fresh air device, and the fresh air device is the above-mentioned fresh air device.

[0016] The present invention also provides a control method for an air conditioner, which is used to control the above-mentioned air conditioner, and includes the following steps:

[0017] Obtain the operation mode of the air conditioner;

[0018] When the operation mode is the fresh air introduction mode, detect whether there is anyone near the first preset side of the air conditioner;

[0019] According to the detection result, control the opening or closing of the first fresh air outlet and the second fresh air outlet, and control the fresh air device to communicate with the external environment.

[0020] Preferably, controlling the opening or closing of the first fresh air outlet or the second fresh air outlet according to the detection result includes:

[0021] When the detection result is that there is someone near the first preset side, control the first fresh air outlet to be closed and the second fresh air outlet to be connected;

[0022] When the detection result is that there is no one near the first preset side, control the first fresh air outlet to be connected and the second fresh air outlet to be closed.

[0023] Preferably, when the fresh air device includes a flow path switching damper, controlling the first fresh air outlet to be closed and the second fresh air outlet to be connected includes controlling the flow path switching damper to be in the second position; controlling the first fresh air outlet to be connected and the second fresh air outlet to be closed includes controlling the flow path switching damper to be in the third position.

[0024] Preferably, when including a first damper, controlling the fresh air device to communicate with the external environment includes: controlling the first damper to be in the connected position.

[0025] For a fresh air device, an air conditioner and its control method provided by the present invention, the first fresh air outlet and the second fresh air outlet are respectively arranged towards different sides of the air conditioner, and the first fresh air outlet and the second fresh air outlet can be controlled to be opened or closed, so that the fresh air outlet direction of the fresh air device can be controlled to be discharged towards a preset direction, effectively preventing the user from being directly blown by the fresh air when the user is at the preset side of the air conditioner, and thus improving the user comfort. Description of the Drawings

[0026] Figure 1 It is a disassembled structural schematic diagram of the fresh air device according to the embodiment of the present invention;

[0027] Figure 2 For Figure 1Schematic diagram of the internal structure of the fresh air device in []. The arrow in the figure shows the path of fresh air sent from the first fresh air discharge outlet to the room;

[0028] Figure 3 is Figure 1 Schematic diagram of the dirty air discharge path of the fresh air device in [].

[0029] Figure 4 is Figure 1 Schematic diagram of the internal structure of the fresh air device in []. The arrow in the figure shows the path of fresh air sent from the second fresh air discharge outlet to the room;

[0030] Figure 5 is Figure 1 Path of fresh air sent from the second fresh air discharge outlet to the room of the fresh air device in []. The situation of two second fresh air discharge outlets is shown in the figure;

[0031] Figure 6 Schematic diagram (partial) of the internal structure of the air conditioner according to another embodiment of the present invention.

[0032] The reference numerals are shown as:

[0033] 1. Fresh air drive chamber; 111. Fresh air inlet pipe; 13. First fan blade; 2. Dirty air drive chamber; 21. Dirty air inlet; 22. Dirty air discharge outlet; 221. Dirty air discharge pipe; 23. Second fan blade; 31. First drive motor; 32. Second drive motor; 41. First air door; 411. First flow-through hole; 412. Second flow-through hole; 51. Filter handle; 512. Dirty air inlet; 52. First filter element; 53. Filter mounting bracket; 101. Dirty air side volute; 1011. Dirty air volute main body; 1012. Second flow-through hole; 1013. Second volute cover; 102. Motor mounting plate; 103. Fresh air side volute; 1031. Fresh air volute main body; 10311. First dirty air flow-through hole; 10312. Second dirty air flow-through hole; 1032. First flow-through hole; 1033. First volute cover; 1034. Dirty air flow-through adapter housing; 6. Fresh air delivery pipe; 601. First branch section; 602. Second branch section; 61. First fresh air outlet; 62. Second fresh air outlet; 63. Air inlet; 64. Heat exchanger; 65. Air outlet; 66. Air outlet duct; 7. Flow path switching air door; 71. First door panel; 72. Second door panel; 73. Air door switching motor; 74. Human body sensing device. Detailed implementation manners

[0034] Combined with reference to Figures 1 to 6As shown, according to an embodiment of the present invention, a fresh air device is provided, including a device housing. The device housing is provided with a fresh air outlet pipe 6. The fresh air outlet pipe 6 has a first fresh air outlet 61 facing a first preset side of the air conditioner and a second fresh air outlet 62 facing a second preset side of the air conditioner. Any one of the first fresh air outlet 61 and the second fresh air outlet 62 can be controlled to be conducted or cut off. It can be understood that the fresh air outlet pipe 6 is communicated with the fresh air discharge outlet on the device housing. In this technical solution, the first fresh air outlet 61 and the second fresh air outlet 62 are respectively arranged facing different sides of the air conditioner, and the first fresh air outlet 61 and the second fresh air outlet 62 can be controlled to be conducted or cut off, so that the fresh air outlet direction of the fresh air device can be controlled to be discharged towards a preset direction, effectively preventing the user from being directly blown by the fresh air when the user is at the preset side of the air conditioner, thereby improving the user comfort.

[0035] In some specific embodiments, the first preset side is the air outlet side of the air conditioner under the operating condition, and / or the second preset side is the air inlet side of the air conditioner under the operating condition. For example, when the air conditioner is a cabinet air conditioner, the first preset side is the front side of the air conditioner, and the second preset side is the rear side of the air conditioner. In other cases, the first preset side and the second preset side can be set according to the actual needs of the user.

[0036] In some specific embodiments, the air inlet side has an air inlet 63, and a heat exchanger 64 is arranged inside the air inlet 63. The second fresh air outlet 62 is on the air inlet side of the heat exchanger 64, so that the fresh air introduced by the fresh air device of the air conditioner can be heat-exchanged with the heat exchanger 64 and then enter the room, preventing the indoor temperature from fluctuating too much and further improving the user comfort; and / or the air outlet side has an air outlet 65, and an air outlet duct 66 is arranged inside the air outlet 65. The first fresh air outlet 61 is communicated with the air outlet duct 66, so that the introduced fresh air can be mixed with the air outlet air flow in the air outlet duct 66 and then enter the room, and can also prevent the discomfort caused by the too large difference between the fresh air temperature and the indoor temperature to the user.

[0037] The first fresh air outlet 61 and the second fresh air outlet 62 can be respectively provided with corresponding dampers, and then the corresponding fresh air outlets can be connected or cut off by respectively controlling the opening or closing of the corresponding dampers. In some specific embodiments, a flow path switching damper 7 is provided in the fresh air outlet pipe 6. The flow path switching damper 7 has a first position in which both the first fresh air outlet 61 and the second fresh air outlet 62 are cut off, a second position in which the first fresh air outlet 61 is connected to the second fresh air outlet 62 and cut off, and a third position in which the first fresh air outlet 61 cuts off the connection of the second fresh air outlet 62. The flow path switching damper 7 can be controlled to switch between the first position, the second position, and the third position. In this technical solution, the connection or cutoff of any one of the first fresh air outlet 61 and the second fresh air outlet 62 can be achieved by switching the three different positions of the flow path switching damper 7, and the simultaneous cutoff of the two fresh air outlets can also be achieved, thereby simplifying the structural design and control strategy of the fresh air device.

[0038] In some embodiments, the fresh air outlet pipe 6 has a first branch pipe section 601, a second branch pipe section 602, and a main pipe section (not labeled in the figure). The inlet ends of the first branch pipe section 601 and the second branch pipe section 602 are connected together at the main pipe section, and the first branch pipe section 601 is perpendicular to the second branch pipe section 602. The first fresh air outlet 61 is formed on the first branch pipe section 601, and the second fresh air outlet 62 is formed on the second branch pipe section 602. The flow path switching damper 7 includes a first door panel 71 and a second door panel 72 that are perpendicularly connected to each other. When the flow path switching damper 7 is in the first position, the first door panel 71 cuts off the flow path of the first branch pipe section 601, and the second door panel 72 cuts off the flow path of the second branch pipe section 602. It can be understood that the first branch pipe section 601, the second branch pipe section 602, and the main pipe section can be an organic whole, or any two of them can be made into an integral body. Of course, they can also be three separate components assembled into an integral body, and the present invention does not specifically limit this. In this technical solution, the mutually perpendicular first branch pipe section 601 and second branch pipe section 602 cooperate with the mutually perpendicular first door panel 71 and second door panel 72, so that the on-off switching can be realized by controlling the rotation angle of the flow path switching damper 7. At this time, when the first door panel 71 and the second door panel 72 respectively close the inlets of the first branch pipe section 601 and the second branch pipe section 602, it corresponds to the first position of the flow path switching damper 7. When the second door panel 72 flips into the second branch pipe section 602 and at the same time the first door panel 71 closes the inlet of the second branch pipe section 602, it corresponds to the second position of the flow path switching damper 7. Similarly, when the first door panel 71 flips into the first branch pipe section 601 and at the same time the second door panel 72 closes the inlet of the first branch pipe section 601, it corresponds to the third position of the flow path switching damper 7. This technical solution makes the device structure extremely simple and the control more convenient.

[0039] In some embodiments, one end of the second branch pipe section 602 away from the main pipe section is a branch structure, and there are multiple second fresh air outlets 62. The multiple second fresh air outlets 62 are respectively formed at the ends of each branch of the branch structure. For example, there are two in the embodiments of the present invention, and of course, more can be set according to actual needs to meet the introduction of fresh air in different directions.

[0040] In some embodiments, the fresh air device further includes a damper switching motor 73 for driving the flow path switching damper 7 to switch between a first position, a second position, and a third position, so as to automate the flow path switching. A human body sensing device 74 is provided on a first preset side of the air conditioner. The human body sensing device 74 can sense whether there is anyone near the first preset side of the air conditioner. It can be understood that the vicinity of the first preset side is limited by the sensing distance of the human body sensing device 74 or the set detection distance of the user. For example, it is within a range with a radius of 0.5 m centered on the human body sensing device 74. The purpose of setting the human body sensing device 74 is to detect whether there is anyone within the preset range, thereby preventing the fresh air from being introduced and directly blowing on the user. The human body sensing device 74 can be, for example, a common infrared sensor. In some embodiments, when the human body sensing device 74 senses someone, it can feedback a corresponding signal to the control component, and then can control the corresponding damper valve to perform corresponding actions, thereby changing the fresh air delivery path. Specifically, for example, switching the position of the aforementioned flow path switching damper 7.

[0041] In some embodiments, a fresh air driving chamber 1 and a dirty air driving chamber 2 are constructed in the device housing. The fresh air driving chamber 1 and the dirty air driving chamber 2 are independent of each other. The fresh air driving chamber 1 has a fresh air inlet (not shown and not labeled in the figure) and a fresh air outlet (not shown and not labeled in the figure). A first air blade 13 is provided in the fresh air driving chamber 1 for driving and introducing, for example, fresh air flow in the external environment into the fresh air driving chamber 1 through the fresh air inlet and discharging it into the indoor space through the fresh air outlet. The dirty air driving chamber 2 has a dirty air inlet 21 and a dirty air outlet 22. A second air blade 23 is provided in the dirty air driving chamber 2. The second air blade 23 is used for driving and introducing the indoor dirty air flow into the dirty air driving chamber 2 through the dirty air inlet 21 and discharging it into the outdoor environment through the dirty air outlet 22. In this technical solution, the first air blade 13 and the second air blade 23 can respectively drive the fresh air and the indoor dirty air, so that the fresh air device can introduce the fresh air in the external environment into the indoor while discharging the indoor dirty air into the outdoor environment, more efficiently improving the indoor air quality. At the same time, since the fresh air driving chamber 1 and the dirty air driving chamber 2 are both constructed in the device housing, the overall structure of the fresh air device is more compact and occupies less space.

[0042] It can be understood that the first wind blade 13 and the second wind blade 23 are both driven to rotate by corresponding driving devices, such as driving motors. As a more optimal way, the fresh air device further includes a first driving motor 31. The first driving motor 31 is a double-output shaft motor. The first wind blade 13 and the second wind blade 23 are respectively sleeved on both ends of the power output shaft of the double-output shaft motor, so that the structure of the fresh air device can be made more compact while reducing the purchase cost of the driving motor. In addition, the design of the electrical control system can be simplified.

[0043] The fresh air inlet corresponds to the fresh air inlet pipe 111, and the dirty air outlet 22 corresponds to the dirty air discharge pipe 221. A first air door 41 is provided at the fresh air inlet pipe 111 and the dirty air discharge pipe 221. The first air door 41 has a communication position that connects the fresh air inlet pipe 111 with the fresh air driving chamber 1 and the dirty air discharge pipe 221 with the dirty air driving chamber 2, and a cut-off position that cuts off the fresh air inlet pipe 111 from the fresh air driving chamber 1 and the dirty air discharge pipe 221 from the dirty air driving chamber 2. In some embodiments, the first air door 41 includes an air door plate body. A first flow-through hole 411 corresponding to the fresh air inlet pipe 111 is formed on the air door plate body, and a second flow-through hole 412 corresponding to the dirty air discharge pipe 221 is further formed on the air door plate body. The air door plate body can rotate around its geometric central axis to realize the switching of the first air door 41 between the communication position and the cut-off position. The switching of the communication position and the cut-off position by the rotation of the air door plate body can make the structure inside the fresh air device simpler. More importantly, the air door plate body does not adopt a flipping method to realize the position switching, making the internal structure of the fresh air device more compact.

[0044] In some embodiments, the device housing includes a dirty air side volute 101, a motor mounting plate 102, and a fresh air side volute 103. The dirty air side volute 101 and the motor mounting plate 102 are assembled into one body to form the dirty air driving chamber 2 therebetween. The fresh air side volute 103 and the motor mounting plate 102 are assembled into one body to form the fresh air driving chamber 1 therebetween. The first driving motor 31 is fixedly connected to the motor mounting plate 102 and can be located in the fresh air driving chamber 1 or the dirty air driving chamber 2. Sealing treatment should be carried out between adjacent two components. The assembly method of the dirty air side volute 101, the motor mounting plate 102, and the fresh air side volute 103 can make the formation of the fresh air driving chamber 1 and the dirty air driving chamber 2 more convenient. The three components can be respectively manufactured by injection molding, reducing the overall injection molding process difficulty. The motor mounting plate 102 can be assembled by two oppositely arranged plate bodies. At this time, the first driving motor 31 can be clamped by the two plate bodies.

[0045] As a specific implementation of the fresh air side volute 103, the fresh air side volute 103 includes a fresh air volute main body 1031. A first through-flow hole 1032 is formed on the fresh air volute main body 1031. The first wind blade 13 is located within the first through-flow hole 1032. A first volute cover 1033 is connected to the side of the first through-flow hole 1032 away from the motor mounting plate 102. The fresh air inlet is formed on the first volute cover 1033. At this time, the fresh air volute main body 1031 and the first volute cover 1033 can be respectively formed by injection molding, further reducing the overall injection molding process difficulty.

[0046] In some embodiments, a first filtering assembly (not labeled in the figure) is provided on the communication path between the first through-flow hole 1032 and the fresh air inlet, so as to filter and purify the fresh air introduced through the fresh air inlet.

[0047] As a specific implementation of the first filtering assembly, the first filtering assembly includes a filter handle 51. The filter handle 51 has a placement groove (it can be understood that the placement groove has ventilation holes). A first filter element 52 is placed in the placement groove. The filter handle 51 serves as the placement carrier for the first filter element 52. Pulling the filter handle 51 can drive the first filter element 52 to enter and exit the fresh air side volute 103. The first filter element 52 can be, for example, a HEPA filter screen.

[0048] A dirty air inlet 512 is provided on the first volute cover 1033 to enable indoor dirty air to enter the dirty air driving cavity 2 through it. A second filter element (not shown in the figure) is provided in the dirty air inlet 512. The second filter element can be, for example, a conventional filter screen, so as to prevent external cotton fluffs and particulate dirt from entering the interior of the fresh air device; A first dirty air through-flow hole 10311 communicating with the dirty air inlet 21 of the dirty air driving cavity 2 is also formed on the fresh air volute main body 1031, so that the channel for the dirty air to flow is integrated on the fresh air volute main body 1031, further improving the structural compactness of the fresh air device.

[0049] In some embodiments, the fresh air device further includes a dirty air flow transfer shell 1034. A second dirty air through-flow hole 10312 communicating with the dirty air discharge port 22 of the dirty air driving cavity 2 is also formed on the fresh air volute main body 1031. The dirty air flow transfer shell 1034 is formed with a through-flow hole (not labeled in the figure) for docking with the second dirty air through-flow hole 10312 and a through-flow hole (not labeled in the figure) for docking with the dirty air discharge pipe 221, further improving the structural compactness of the fresh air device.

[0050] As a specific implementation of the dirty air side volute 101, preferably, the dirty air side volute 101 includes a dirty air volute main body 1011, a second flow through hole 1012 is formed on the dirty air volute main body 1011, the second wind blade 23 is located within the second flow through hole 1012, a second volute cover 1013 is connected to a side of the second flow through hole 1012 away from the motor mounting plate 102. At this time, the dirty air volute main body 1011 and the second volute cover 1013 can be formed by injection molding respectively, further reducing the overall injection molding process difficulty.

[0051] In some embodiments, the first fresh air outlet 61 is preferably formed on the second volute cover 1013. It can be understood that the first fresh air outlet 61 communicates with the fresh air discharge outlet.

[0052] To further improve the structural compactness of the fresh air device, a first fresh air flow through hole (not labeled in the figure) communicating with the fresh air discharge outlet is also formed on the dirty air volute main body 1011.

[0053] In some embodiments, the first drive motor 31, the second drive motor 32, and the air door switching motor 73 are all stepper motors, and the first wind blade 13 and the second wind blade 23 are both centrifugal wind blades.

[0054] According to an embodiment of the present invention, an air conditioner is further provided, including a fresh air device, and the fresh air device is the above-mentioned fresh air device.

[0055] According to an embodiment of the present invention, a control method for an air conditioner is further provided, used to control the above-mentioned air conditioner, including the following steps:

[0056] Obtain the operating mode of the air conditioner;

[0057] When the operating mode is the fresh air introduction mode, detect whether there is anyone near a first preset side of the air conditioner;

[0058] According to the detection result, control the conduction or truncation of the first fresh air outlet 61 and the second fresh air outlet 62, and control the fresh air device to communicate with the external environment. It can be understood that at this time, the first drive motor 31 operates to drive the first wind blade 13 and the second wind blade 23 to realize the introduction of outdoor fresh air and the discharge of indoor dirty air. Among them, the discharge path of the indoor dirty air is unique, such as Figure 3As shown, it enters the dirty air driving chamber 2 through the dirty air inlet 512 and is discharged to the outdoor environment through the dirty air discharge pipe 221. At the same time, the introduction and discharge paths of fresh air are selected according to the actual situation. Specifically, controlling the conduction or truncation of the first fresh air outlet 61 or the second fresh air outlet 62 according to the detection result includes: when the detection result is that there is someone near the first preset side, controlling the first fresh air outlet 61 to be truncated and the second fresh air outlet 62 to be connected; when the detection result is that there is no one near the first preset side, controlling the first fresh air outlet 61 to be connected and the second fresh air outlet 62 to be truncated. Refer to Figure 2 and 4 As shown, when the fresh air device includes a flow path switching air damper 7, controlling the first fresh air outlet 61 to be truncated and the second fresh air outlet 62 to be connected includes controlling the flow path switching air damper 7 to be in the second position ( Figure 2 ); controlling the first fresh air outlet 61 to be connected and the second fresh air outlet 62 to be truncated includes controlling the flow path switching air damper 7 to be in the third position ( Figure 4 ).

[0059] In some embodiments, when the first air damper 41 is included, controlling the fresh air device to communicate with the external environment includes: controlling the first air damper 41 to be in the connected position.

[0060] 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.

[0061] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above is only the preferred implementation manner of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can still be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A fresh air device, characterized in that, It includes a device housing, on which there is a fresh air outlet pipe (6). The fresh air outlet pipe (6) has a first fresh air outlet (61) facing the first preset side of the air conditioner and a second fresh air outlet (62) facing the second preset side of the air conditioner. Either the first fresh air outlet (61) or the second fresh air outlet (62) can be controlled to be conducted or cut off. A flow path switching damper (7) is provided in the fresh air outlet pipe (6). The flow path switching damper (7) has a first position where both the first fresh air outlet (61) and the second fresh air outlet (62) are cut off, a second position where the first fresh air outlet (61) is conducted and the second fresh air outlet (62) is cut off, and a third position where the first fresh air outlet (61) is cut off and the second fresh air outlet (62) is conducted. The flow path switching damper (7) can be controlled to switch between the first position, the second position, and the third position. The fresh air outlet pipe (6) has a first branch pipe section (601), a second branch pipe section (602), and a main pipe section. The inlet ends of the first branch pipe section (601) and the second branch pipe section (602) are connected in a converging manner at the main pipe section, and the first branch pipe section (601) is perpendicular to the second branch pipe section (602). The first fresh air outlet (61) is formed on the first branch pipe section (601), and the second fresh air outlet (62) is formed on the second branch pipe section (602). The flow path switching damper (7) includes a first door panel (71) and a second door panel (72) that are perpendicularly connected. When the flow path switching damper (7) is in the first position, the first door panel (71) cuts off the flow path of the first branch pipe section (601), and the second door panel (72) cuts off the flow path of the second branch pipe section (602). When the second door panel (72) flips into the second branch pipe section (602) and at the same time the first door panel (71) correspondingly closes the inlet of the second branch pipe section (602), it corresponds to the second position of the flow path switching damper (7). When the first door panel (71) flips into the first branch pipe section (601) and at the same time the second door panel (72) correspondingly closes the inlet of the first branch pipe section (601), it corresponds to the third position of the flow path switching damper (7). The first preset side is the air outlet side of the air conditioner under the operating condition, and the second preset side is the air inlet side of the air conditioner under the operating condition. A human body sensing device (74) is provided on the first preset side of the air conditioner. The human body sensing device (74) can sense whether there is anyone near the first preset side of the air conditioner. When the detection result is that there is someone near the first preset side, control the first fresh air outlet (61) to be cut off and the second fresh air outlet (62) to be connected. When the detection result is that there is no one near the first preset side, control the first fresh air outlet (61) to be connected and the second fresh air outlet (62) to be cut off.

2. The fresh air device according to claim 1, wherein The air inlet side is provided with an air inlet (63), and a heat exchanger (64) is arranged inside the air inlet (63). The second fresh air outlet (62) is located on the air inlet side of the heat exchanger (64); and / or, the air outlet side is provided with an air outlet (65), and an air outlet duct (66) is arranged inside the air outlet (65). The first fresh air outlet (61) communicates with the air outlet duct (66).

3. The fresh air device according to claim 1, wherein One end of the second branch section (602) away from the main section is a branch structure. There are a plurality of second fresh air outlets (62), and each of the plurality of second fresh air outlets (62) is respectively constructed at the end of each branch of the branch structure.

4. The fresh air device according to claim 1, characterized in that It further includes a damper switching motor (73), and the damper switching motor (73) is used to drive the flow path switching damper (7) to switch between a first position, a second position, and a third position.

5. The fresh air device according to claim 1, characterized in that, A fresh air driving cavity (1) and a dirty air driving cavity (2) are constructed inside the device housing. The fresh air driving cavity (1) and the dirty air driving cavity (2) are independent of each other. The fresh air driving cavity (1) has a fresh air inlet (11) and a fresh air outlet (12). The fresh air outlet (12) is communicated with the inlet of the fresh air delivery pipe (6). A first air blade (13) is arranged inside the fresh air driving cavity (1). The dirty air driving cavity (2) has a dirty air inlet (21) and a dirty air outlet (22). A second air blade (23) is arranged inside the dirty air driving cavity (2).

6. The fresh air device according to claim 5, characterized in that, The fresh air inlet (11) corresponds to a fresh air inlet pipe (111), and the dirty air outlet (22) corresponds to a dirty air discharge pipe (221). A first damper (41) is arranged at the fresh air inlet pipe (111) and the dirty air discharge pipe (221). The first damper (41) has a communicating position for communicating the fresh air inlet pipe (111) with the fresh air driving cavity (1) and the dirty air discharge pipe (221) with the dirty air driving cavity (2), and a cutoff position for cutting off the fresh air inlet pipe (111) from the fresh air driving cavity (1) and the dirty air discharge pipe (221) from the dirty air driving cavity (2).

7. The fresh air device according to claim 6, characterized in that, The first damper (41) includes a damper plate body. A first flow hole (411) corresponding to the fresh air inlet pipe (111) is constructed on the damper plate body. A second flow hole (412) corresponding to the dirty air discharge pipe (221) is further constructed on the damper plate body. The damper plate body can rotate around its geometric central axis to realize the switching of the first damper (41) between the communicating position and the cutoff position.

8. An air conditioner, comprising a fresh air device, characterized in that, The fresh air device is the fresh air device according to any one of claims 1 to 7.

9. A control method for an air conditioner, characterized in that, For controlling the air conditioner according to claim 8, it includes the following steps: Obtain the operating mode of the air conditioner; When the operating mode is the fresh air introduction mode, detect whether there is anyone near the first preset side of the air conditioner; According to the detection result, control the conduction or cutoff of the first fresh air outlet (61) and the second fresh air outlet (62), and control the connection between the fresh air device and the external environment.

10. The control method according to claim 9, wherein, Controlling the opening or closing of the first fresh air outlet (61) or the second fresh air outlet (62) according to the detection result includes: When the detection result indicates that there is someone near the first preset side, controlling the first fresh air outlet (61) to close and the second fresh air outlet (62) to open; When the detection result indicates that there is no one near the first preset side, controlling the first fresh air outlet (61) to open and the second fresh air outlet (62) to close.

11. The control method according to claim 10, characterized in that, Controlling the first fresh air outlet (61) to close and the second fresh air outlet (62) to open includes controlling the flow path switching damper (7) to be in the second position; controlling the first fresh air outlet (61) to open and the second fresh air outlet (62) to close includes controlling the flow path switching damper (7) to be in the third position.

12. The control method according to claim 9, wherein When the first damper (41) is included, controlling the fresh air device to communicate with the external environment includes: controlling the first damper (41) to be in the open position.

Images