A fresh air system and fresh air air conditioner

Abstract

The application discloses a fresh air system and a fresh air air conditioner. The fresh air system comprises a volute, a fan, a volute cover and a damper assembly. The volute is provided with a fresh air outlet and an exhaust air outlet. The fan is arranged in the volute. The volute cover is arranged on the volute and is provided with a cavity in communication with the volute. The cavity is provided with an exhaust air inlet, an internal circulation air inlet and a fresh air inlet. The damper assembly is used for opening or closing the fresh air outlet, the exhaust air outlet, the exhaust air inlet, the internal circulation air inlet and the fresh air inlet. When the fresh air inlet and the fresh air outlet are opened, a fresh air channel is formed between the volute and the cavity. When the exhaust air inlet and the exhaust air outlet are opened, an exhaust air channel is formed between the volute and the cavity. When the internal circulation air inlet and the fresh air outlet are opened, an internal circulation channel is formed between the volute and the cavity. The application realizes the compatibility of three modes of the fresh air function, the exhaust air function and the indoor circulation function and simplifies the structure.

Description

Technical Field

[0001] This invention relates to the field of fresh air conditioning technology, and more particularly to a fresh air system and a fresh air air conditioner. Background Technology

[0002] With increasing demands for indoor environmental comfort, indoor air quality has become an indispensable factor in the comfort experience. Fresh air systems can introduce fresh air, replace circulating indoor air, reduce indoor carbon dioxide concentration and the concentration of other harmful gases, keep indoor air fresh, and thus improve the defects of poor indoor air circulation.

[0003] Existing fresh air systems can only provide single air intake or single air exhaust, which is not very efficient for indoor air circulation. If an air intake device and an exhaust device are installed, two fans, two pipes, and two additional wall holes are required, which not only takes up space but also incurs a lot of equipment and installation costs. Summary of the Invention

[0004] The embodiments of the present invention provide a fresh air system and a fresh air air conditioner, which aim to combine a fresh air device, an exhaust device and an indoor circulation device into a single device, simplifying the structure of the fresh air system, improving efficiency, saving space and simplifying installation.

[0005] This invention provides a fresh air system, comprising:

[0006] The volute is equipped with a fresh air outlet and an exhaust air outlet;

[0007] The fan is located inside the volute.

[0008] A volute cover is provided on the volute. The volute cover has a cavity communicating with the volute. The cavity has an exhaust air inlet, an internal circulation air inlet, and a fresh air inlet.

[0009] A damper assembly is used to open or close the fresh air outlet, the exhaust air outlet, the exhaust air inlet, the internal circulation air inlet, and the fresh air inlet;

[0010] Specifically, when the fresh air inlet and the fresh air outlet are opened, a fresh air channel is formed between the inside of the volute and the cavity; when the exhaust air inlet and the exhaust air outlet are opened, an exhaust air channel is formed between the inside of the volute and the cavity; and when the internal circulation air inlet and the fresh air outlet are opened, an internal circulation channel is formed between the inside of the volute and the cavity.

[0011] In the fresh air system provided by the present invention, the damper assembly includes a first damper, the fresh air outlet and the exhaust air inlet are arranged vertically at intervals, and the first damper can move vertically along the fresh air outlet and the exhaust air inlet to open or close the fresh air outlet and the exhaust air inlet.

[0012] In the fresh air system provided by the present invention, the damper assembly further includes a second damper. The exhaust outlet and the fresh air inlet are arranged vertically at intervals. The second damper can move vertically along the exhaust outlet and the fresh air inlet to open or close the exhaust outlet and the fresh air inlet.

[0013] In the fresh air system provided by the present invention, the damper assembly further includes a third damper, which can rotate relative to the fresh air inlet to open or close the fresh air inlet.

[0014] In the fresh air system provided by the present invention, the damper assembly further includes a fourth damper, which can rotate relative to the internal circulation air inlet to open or close the internal circulation air inlet.

[0015] In the fresh air system provided by the present invention, when the first air damper moves upward, the second air damper moves downward and the third air damper rotates, the fresh air inlet and the fresh air outlet open to form the fresh air channel.

[0016] In the fresh air system provided by the present invention, when the first air damper moves down, the second air damper moves up and the third air damper rotates, the exhaust air inlet and the exhaust air outlet open to form the exhaust air channel.

[0017] In the fresh air system provided by the present invention, the second air damper is provided with a hollow cavity; when the fourth air damper rotates, the second air damper moves upward and the third air damper rotates, the internal circulation air inlet opens, and the hollow cavity connects the internal circulation air inlet and the fresh air outlet to form an auxiliary exhaust channel.

[0018] In the fresh air system provided by the present invention, when the fourth air damper rotates, the second air damper moves down and the first air damper moves up, the internal circulation air inlet and the fresh air outlet open to form the internal circulation channel.

[0019] In the fresh air system provided by the present invention, the damper assembly further includes a first motor and a first gear. The first damper is provided with a first rack, and the first gear meshes with the first rack. The first motor drives the first gear to rotate, thereby moving the first damper; and / or

[0020] The damper assembly also includes a second motor and a second gear. The second damper is provided with a second rack, and the second gear meshes with the second rack. The second motor drives the second damper to move by driving the second gear to rotate.

[0021] In the fresh air system provided by this invention, the damper assembly further includes a third motor, the output shaft of which is connected to one side of the third damper; and / or

[0022] The damper assembly also includes a fourth motor, the output shaft of which is connected to one side of the fourth damper.

[0023] In the fresh air system provided by the present invention, the fresh air system further includes a side duct, one end of which covers the internal circulation air inlet, a fourth damper is provided at one end of the side duct, the fourth damper can rotate toward the inside of the side duct to open the internal circulation air inlet, and the other end of the side duct is used to connect to the indoor side.

[0024] In the fresh air system provided by the present invention, the fresh air system further includes a fresh air connector, one end of which is covered by the fresh air inlet and the exhaust outlet, and the other end of which is used to connect to the outdoor side.

[0025] In the fresh air system provided by the present invention, when the second damper moves down to close the exhaust outlet and the third damper rotates to close the fresh air inlet, the second damper and the third damper block one end of the fresh air connector.

[0026] In the fresh air system provided by the present invention, the fresh air system further includes a filter screen, which is inclinedly disposed in the cavity.

[0027] The present invention also provides a fresh air air conditioner, including the above-mentioned fresh air system.

[0028] This invention provides a fresh air system and a fresh air air conditioner. The fresh air system includes: a volute, a fan, a volute cover, and a damper assembly. The volute has a fresh air outlet and an exhaust air outlet. The fan is located inside the volute. The volute cover covers the volute and has a cavity that communicates with the volute. The cavity has an exhaust air inlet, an internal circulation air inlet, and a fresh air inlet. When the damper assembly opens the fresh air inlet and the fresh air outlet, a fresh air channel is formed inside the volute and the cavity. When the damper assembly opens the exhaust air inlet and the exhaust air outlet, a fresh air channel is formed inside the volute and the cavity. When the air inlet and outlet are open, an exhaust channel is formed inside the volute and the cavity. When the damper assembly opens the internal circulation air inlet and the fresh air outlet, an internal circulation channel is formed inside the volute and the cavity, and the internal circulation air outlet and the fresh air outlet share the same outlet. Thus, by opening different air inlets and outlets through the damper assembly, the switching between the fresh air channel, the exhaust channel and the internal circulation channel can be realized. Only one fan is needed to be compatible with the three modes of fresh air function, exhaust function and indoor circulation function, simplifying the structure of the fresh air system, saving space and simplifying installation. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is an exploded view of the fresh air system according to an embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of a fresh air system according to an embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram showing the concealed sealing cover in a fresh air system according to an embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram showing the concealed sealing cover in a fresh air system according to an embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram of the upward movement of the first air damper in the fresh air system according to an embodiment of the present invention;

[0035] Figure 6 This is a schematic diagram of the downward movement of the first air damper in the fresh air system according to an embodiment of the present invention;

[0036] Figure 7 This is a schematic diagram of the side duct of the fresh air system according to an embodiment of the present invention;

[0037] Figure 8 This is a schematic diagram of a fresh air system with concealed side ducts according to an embodiment of the present invention;

[0038] Figure 9 This is a schematic diagram of the first air damper of the fresh air system according to an embodiment of the present invention;

[0039] Figure 10 This is a schematic diagram of the second air damper of the fresh air system according to an embodiment of the present invention;

[0040] Figure 11 This is a schematic diagram of the third air damper of the fresh air system according to an embodiment of the present invention;

[0041] Figure 12 This is a schematic diagram of the fourth air damper of the fresh air system according to an embodiment of the present invention;

[0042] Figure 13 This is a schematic diagram of the fresh air system in an embodiment of the present invention when it is not in operation;

[0043] Figure 14 This is a schematic diagram of the fresh air mode of the fresh air system according to an embodiment of the present invention;

[0044] Figure 15 This is a schematic diagram of the exhaust mode of the fresh air system according to an embodiment of the present invention;

[0045] Figure 16 This is a schematic diagram of the auxiliary exhaust mode of the fresh air system according to an embodiment of the present invention;

[0046] Figure 17 This is a schematic diagram of the indoor circulation mode of the fresh air system according to an embodiment of the present invention;

[0047] Figure 18 This is a schematic diagram of a fresh air conditioner according to an embodiment of the present invention;

[0048] Figure 19 This is another schematic diagram of a fresh air conditioner according to an embodiment of the present invention; Attached image description:

[0050] 1. Volute; 11. Fresh air outlet; 12. Exhaust air outlet; 2. Fan; 3. Volute cover; 31. Cavity; 32. Exhaust air inlet; 33. Internal circulation air inlet; 34. Fresh air inlet; 4. Damper assembly; 411. First damper; 412. First motor; 413. First gear; 414. First rack; 421. Second damper; 422. Second motor; 423. Second gear; 424. Second rack; 425. Hollow cavity; 431. Third damper; 432. Third motor; 441. Fourth damper; 442. Fourth motor; 5. Side duct; 6. Fresh air connector; 7. Filter screen; 8. Sealing cover; 100. Fresh air system; 200. Fresh air air conditioner; 201. Bottom shell; 202. Opening. Detailed Implementation

[0051] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0052] The directional terms used in this invention, such as "up," "down," "front," "back," "left," "right," "inner," "outer," and "side," are merely for reference to the accompanying drawings. Therefore, the directional terms used are for illustrating and understanding this invention, and not for limiting it. Furthermore, in the drawings, structures that are similar or identical are indicated by the same reference numerals.

[0053] Please see Figures 1-19 , Figure 1 A fresh air air conditioner 200 according to an embodiment of the present invention includes: a volute 1, a fan 2, a volute 1 cover, and a damper assembly 4. The volute 1 has a fresh air outlet 11 and an exhaust air outlet 12. The fan 2 is disposed inside the volute 1. The volute 1 cover is disposed on the volute 1 and has a cavity 31 communicating with the volute 1. The cavity 31 has an exhaust air inlet 32, an internal circulation air inlet 33, and a fresh air inlet 34. The damper assembly 4 is used to open or close the fresh air outlet 11 and the exhaust air outlet 12. The system includes an air vent 12, an exhaust air inlet 32, an internal circulation air inlet 33, and a fresh air inlet 34. When the fresh air inlet 34 and the fresh air outlet 11 are open, a fresh air channel is formed between the inside of the volute 1 and the cavity 31. When the exhaust air inlet 32 ​​and the exhaust air outlet 12 are open, an exhaust air channel is formed between the inside of the volute 1 and the cavity 31. When the internal circulation air inlet 33 and the fresh air outlet 11 are open, an internal circulation channel is formed between the inside of the volute 1 and the cavity 31.

[0054] Reference Figures 2-4Specifically, the volute 1 is generally circular, with the fan 2 located at its center. Both the upper and lower sides of the volute 1 have extended housing portions tangent to the circular volute 1. A fresh air outlet 11 is located on the upper extended housing portion, and an exhaust air outlet 12 is located on the lower extended housing portion. One side of the volute 1 is open, and a cover is placed over this open side to seal it. A cavity 31 is located on the side of the cover facing away from the volute 1. The cavity 31 includes a rectangular cavity and a triangular cavity. The triangular cavity is located below the rectangular cavity, and the two cavities 31 are interconnected. The rectangular cavity is located above the circular volute 1, and the triangular cavity is located above the lower extended housing portion. An exhaust air inlet 32 ​​is located on the upper side of the rectangular cavity, and an internal circulation air inlet 33 and a fresh air inlet 34 are located on two adjacent sidewalls of the triangular cavity. A circular through hole is hollowed out on the volute 1 cover, allowing the volute 1 to communicate with the rectangular cavity. A sealing cover 8 is also provided on the side of the cavity 31 away from the volute 1. The shape of the sealing cover 8 matches the shape of the cavity 31, also being a combination of rectangle and triangle, and is used to seal the cavity 31. The damper assembly 4 includes several dampers, which are located at the fresh air outlet 11, exhaust air outlet 12, exhaust air inlet 32, internal circulation air inlet 33, and fresh air inlet 34. The dampers are configured to open the aforementioned air inlets and outlets. It should be noted that the structure of the dampers can vary; for example, they can be rotating, sliding, or louvered. Regardless of the structure, as long as it can achieve the opening or closing function, it is acceptable, and no limitation is made here.

[0055] In this embodiment, the fresh air system 100 further includes a filter 7, which is obliquely disposed within the cavity 31. Specifically, the inner wall of the rectangular cavity is provided with an oblique step or groove, and the filter 7 is placed on the step or groove, thus obliquely disposing the filter 7. Specifically, the filter 7 is obliquely disposed along the diagonal of the rectangular cavity. The side of the filter 7 near the exhaust air inlet 32 ​​is higher, and the side of the filter 7 near the triangular cavity is lower; that is, the filter 7 is obliquely downward from the top side of the exhaust air inlet 32. The diagonal oblique arrangement of the filter 7 maximizes the contact area with the airflow, allowing for sufficient contact with the air and effectively filtering out impurities in the air. The filter 7 is used in two ways: firstly, in the fresh air function mode, to filter dust, odors, and some bacteria from the outdoor air; and secondly, in the indoor circulation function mode, to filter dust and some bacteria from the indoor air.

[0056] In this embodiment, the fresh air system 100 further includes a fresh air connector 6. One end of the fresh air connector 6 covers the fresh air inlet 34 and the exhaust outlet 12, and the other end of the fresh air connector 6 is used to connect to the outdoor side. Specifically, the fresh air connector 6 is generally duct-shaped, with a rectangular connector at one end and a circular connector at the other end. The rectangular connector is fixed to both the lower extended housing and the triangular cavity, thereby covering the exhaust outlet 12 on the lower extended housing and the fresh air inlet 34 on the triangular cavity. The circular connector connects to the duct leading to the outdoor side. Thus, fresh air from the outdoor side can enter the fresh air inlet 34 through the fresh air connector 6. In addition, stale indoor air can also enter the fresh air connector 6 through the exhaust outlet 12 and then be discharged to the outdoor side by the fresh air connector 6.

[0057] In this embodiment, the fresh air system 100 further includes a side duct 5, one end of which covers the internal circulation air inlet 33, and the other end of which connects to the indoor side. Specifically, one end of the side duct 5 is fixed to the internal circulation air inlet 33 on the triangular cavity, and the shape of one end of the side duct 5 is the same as the shape of the internal circulation air inlet 33. In this embodiment, the fresh air system 100 is installed on the left side of the indoor unit of the air conditioner, and an opening 202 is provided on one side of the air outlet of the bottom shell 201 of the indoor unit of the air conditioner. The other end of the side duct 5 is bent towards the opening 202, so that the airflow from the indoor side can enter the side duct 5 through the opening 202, and then enter the fresh air system 100 from the internal circulation air inlet 33.

[0058] When the fresh air system 100 enters the fresh air mode, the damper assembly 4 opens the fresh air inlet 34 and the fresh air outlet 11. Fresh air from the outside enters through the fresh air connector 6, and under the action of the fan 2, it passes through the filter screen 7 and is discharged from the fresh air outlet 11, thus realizing the fresh air function.

[0059] When the fresh air system 100 enters the exhaust mode, the damper assembly 4 opens the exhaust air inlet 32 ​​and the exhaust air outlet 12. The airflow on the indoor side enters through the exhaust air inlet 32 ​​and, under the action of the fan 2, is discharged to the outdoor side through the exhaust air outlet 12 from the fresh air connector 6, thus realizing the exhaust function.

[0060] When the fresh air system 100 enters the indoor circulation mode, the damper assembly 4 opens the internal circulation air inlet 33 and the fresh air outlet 11. The airflow on the indoor side enters through the side duct 5, and under the action of the fan 2, after passing through the filter screen 7, it is discharged to the indoor side through the fresh air outlet 11. The fresh air outlet 11 and the internal circulation air outlet are the same outlet and are shared by both, thus realizing the indoor internal circulation function.

[0061] By implementing this embodiment, the damper assembly 4 is used to open different air inlets and outlets to form different air ducts, enabling switching between three modes: fresh air function, exhaust function, and indoor circulation function. Only one fan 2 is needed to support all three modes, eliminating the need for additional ductwork and drilling, greatly simplifying installation and saving costs and space.

[0062] Reference Figure 5 and Figure 6 In one embodiment, the damper assembly 4 includes a first damper 411. The fresh air outlet 11 and the exhaust air inlet 32 ​​are vertically spaced apart. The first damper 411 can move vertically along the fresh air outlet 11 and the exhaust air inlet 32 ​​to open or close them. Specifically, the fresh air outlet 11 and the exhaust air inlet 32 ​​are located on the upper side of the entire fresh air system 100. The fresh air outlet 11 and the exhaust air inlet 32 ​​are vertically adjacent, with the exhaust air inlet 32 ​​on top and the fresh air outlet 11 on the bottom. The first damper 411 is movably installed with the rectangular cavity and the volute 1, allowing it to move vertically. When the first damper 411 moves upward, the exhaust air inlet 32 ​​closes and the fresh air outlet 11 opens; when the first damper 411 moves downward, the exhaust air inlet 32 ​​opens and the fresh air outlet 11 closes. Therefore, the switching between the fresh air outlet 11 and the exhaust air inlet 32 ​​is achieved by moving a damper up and down, simplifying the structure and saving space.

[0063] Continue to refer to Figure 3 In this embodiment, the damper assembly 4 further includes a second damper 421. The exhaust outlet 12 and the fresh air inlet 34 are vertically spaced apart. The second damper 421 can move up and down along the exhaust outlet 12 and the fresh air inlet 34 to open or close them. Specifically, the exhaust outlet 12 and the fresh air inlet 34 are located on the lower side of the entire fresh air system 100. The exhaust outlet 12 and the fresh air inlet 34 are vertically adjacent, with the fresh air inlet 34 on top and the exhaust outlet 12 on the bottom. The second damper 421 is movably installed with the triangular cavity, allowing it to move up and down. When the second damper 421 moves upward, the fresh air inlet 34 closes and the exhaust outlet 12 opens; when the second damper 421 moves downward, the fresh air inlet 34 opens and the exhaust outlet 12 closes. Therefore, the switching between the fresh air inlet 34 and the exhaust outlet 12 is achieved by moving a damper up and down, simplifying the structure and saving space.

[0064] Continue to refer to Figure 3In this embodiment, the damper assembly 4 further includes a third damper 431, which is rotatable relative to the fresh air inlet 34 to open or close the fresh air inlet 34. Specifically, the upper side of the third damper 431 rotates around the upper edge of the fresh air inlet 34, and the third damper 431 can rotate within the triangular cavity. When the third damper 431 rotates upward, it opens the fresh air inlet 34, and when it rotates downward, it closes the fresh air inlet 34.

[0065] Continue to refer to Figure 3 In this embodiment, the damper assembly 4 further includes a fourth damper 441, which is rotatable relative to the internal circulation air inlet 33 to open or close the internal circulation air inlet 33. Specifically, the upper side of the fourth damper 441 rotates around the upper edge of the internal circulation air inlet 33, and the third damper 431 can rotate outside the triangular cavity. When the fourth damper 441 rotates outward, it opens the internal circulation air inlet 33; when it rotates inward, it closes the fresh air inlet 34.

[0066] Reference Figure 7 and Figure 8 In a specific implementation, the fresh air system 100 further includes a side duct 5. One end of the side duct 5 is covered by the internal circulation air inlet 33. A fourth damper 441 is located at one end of the side duct 5. The fourth damper 441 can rotate towards the inside of the side duct 5 to open the internal circulation air inlet 33. The other end of the side duct 5 is used to connect to the indoor side. Specifically, the fourth damper 441 is installed in one end of the side duct 5, and the shape of one end of the side duct 5 matches the shape of the internal circulation air inlet 33 and the fourth damper 441. The upper side of the fourth damper 441 rotates around the upper edge of one end of the side duct 5 towards the inside of the side duct 5. When the fourth damper 441 rotates towards the inside of the side duct 5, the internal circulation air inlet 33 is opened; when the fourth damper 441 rotates towards the outside of the side duct 5, the internal circulation air inlet 33 is closed. By designing the fourth damper 441 to rotate inside the side pipe 5, interference with the rotation of the third damper 431 is avoided. The rotations of the two dampers are independent of each other and do not interfere with each other.

[0067] Reference Figure 9 and Figure 10In one embodiment, the damper assembly 4 further includes a first motor 412 and a first gear 413. The first damper 411 is provided with a first rack 414, and the first gear 413 meshes with the first rack 414. The first motor 412 drives the first damper 411 to move by driving the first gear 413 to rotate. The damper assembly 4 further includes a second motor 422 and a second gear 423. The second damper 421 is provided with a second rack 424, and the second gear 423 meshes with the second rack 424. The second motor 422 drives the second damper 421 to move by driving the second gear 423 to rotate. Specifically, the transmission structures of the first damper 411 and the second damper 421 are similar, both using gear and belt transmission. A toothed belt is provided on one edge of the damper, and a gear is installed on the output shaft of the motor. The gear meshes with the toothed belt, and the motor drives the gear to rotate, thereby moving the toothed belt and realizing the movement of the damper. Specifically, the first gear 413 and the first toothed belt are located near the sides of the fresh air outlet 11 and the exhaust air inlet 32. The first motor 412 is fixed to the volute 1 or the rectangular cavity. The first motor 412 drives the first damper 411 to move upward from the fresh air outlet 11 to the exhaust air inlet 32, or downward from the exhaust air inlet 32 ​​to the fresh air outlet 11. Similarly, the second gear 423 and the second rack 424 are located near the sides of the fresh air inlet 34 and the exhaust air outlet 12. The second motor 422 is fixed to the triangular cavity or the volute 1. The second motor 422 drives the second damper 421 to move upward from the exhaust air outlet 12 to the fresh air inlet 34, or downward from the fresh air inlet 34 to the exhaust air outlet 12. Through the transmission of the gears and the toothed belt, the first damper 411 and the second damper 421 can move up and down. The structure is simple, stable, and reliable.

[0068] Reference Figure 11 and Figure 12In one embodiment, the damper assembly 4 further includes a third motor 432, the output shaft of which is connected to one side of the third damper 431; the damper assembly 4 also includes a fourth motor 442, the output shaft of which is connected to one side of the fourth damper 441. Specifically, the third motor 432 is fixed on the triangular cavity, and a rotating shaft is fixed on the upper side of the third damper 431, the rotating shaft being connected to the output shaft of the third motor 432 via a coupling. Rotation of the output shaft of the third motor 432 drives the third damper 431 to rotate. Similarly, the rotation of the fourth damper 441 is similar; the fourth motor 442 is fixed on the side pipe 5, and a rotating shaft is fixed on the upper side of the fourth damper 441, the rotating shaft being connected to the output shaft of the fourth motor 442 via a coupling. Rotation of the output shaft of the fourth motor 442 drives the fourth damper 441 to rotate. The difference between the rotation of the third damper 431 and the fourth damper 441 is that the third damper 431 rotates towards the inside of the triangular cavity, while the fourth damper 441 rotates towards the inside of the side pipe 5. In this way, the rotation of the two will not cause interference.

[0069] Reference Figure 13 In this embodiment, when the second damper 421 moves down to close the exhaust outlet 12 and the third damper 431 rotates to close the fresh air inlet 34, the second damper 421 and the third damper 431 block one end of the fresh air connector 6. Specifically, when the fresh air system 100 is not working, the third damper 431 and the second damper 421 can prevent backflow and isolate outdoor noise and odors. Specifically, moving the second damper 421 down to close the exhaust outlet 12 and rotating the third damper 431 down to close the fresh air inlet 34, the second damper 421 and the third damper 431 together block one end of the fresh air connector 6, thereby preventing outdoor air from backflowing into the ventilation components and causing abnormal noise, and also blocking odors and dust.

[0070] Reference Figure 14In one embodiment, when the first damper 411 moves upward, the second damper 421 moves downward, and the third damper 431 rotates, the fresh air inlet 34 and the fresh air outlet 11 open to form the fresh air channel. Specifically, the first motor 412 drives the first gear 413 to rotate, and the first gear 413 meshes with the first damper 411, causing the first damper 411 to move upward, at which time the fresh air outlet 11 opens. The second motor 422 drives the second gear 423 to rotate, and the second gear 423 meshes with the second damper 421, causing the second damper 421 to move downward. The third motor 432 drives the third damper 431 to rotate and open inward and upward, at which time the fresh air inlet 34 opens. The fourth damper 441 remains closed. When the fan 2 starts to rotate, fresh outdoor air enters the volute 1 through the fresh air inlet 34 from the fresh air inlet 6, then enters the fan 2 axially through the health filter 7, and finally flows out radially and is discharged into the room through the fresh air outlet 11.

[0071] Reference Figure 15 In one embodiment, when the first damper 411 moves downward, the second damper 421 moves upward, and the third damper 431 rotates, the exhaust inlet 32 ​​and the exhaust outlet 12 open to form the exhaust channel. Specifically, the first motor 412 drives the first gear 413 to rotate, and the first gear 413 meshes with the first damper 411, causing the first damper 411 to move downward, at which time the exhaust inlet 32 ​​opens. The third motor 432 drives the third damper 431 to rotate and open inward and upward. The second motor 422 drives the second gear 423 to rotate, and the second gear 423 meshes with the second damper 421, causing the second damper 421 to move upward, at which time the exhaust outlet 12 opens. The indoor turbid air enters the cavity 31 through the exhaust inlet 32, enters the fan 2 axially, flows out radially, and finally exits through the exhaust outlet 12 into the fresh air connector 6 before being discharged to the outdoor side.

[0072] Reference Figure 16In one embodiment, the second damper 421 is provided with a hollow cavity 425. When the fourth damper 441 rotates, the second damper 421 moves upward, and the third damper 431 rotates, the internal circulation air inlet 33 opens, and the hollow cavity 425 connects the internal circulation air inlet 33 and the fresh air outlet 11 to form an auxiliary exhaust channel. Specifically, the second damper 421 is generally triangular in shape, with two adjacent sides of the triangle facing the internal circulation air inlet 33 and the fresh air inlet 34 / exhaust outlet 12, respectively. The second damper 421 is provided with a hollow cavity 425 penetrating through these two sides, thereby forming an auxiliary exhaust channel with the internal circulation air inlet 33, the hollow cavity 425, and the fresh air outlet 11. The internal circulation air inlet 33 is equivalent to the second exhaust air inlet 32. When the air conditioner is working, the exhaust air volume compensation can be turned on. The fourth motor 442 drives the fourth damper 441 to rotate outward and open. Part of the air from the air conditioner's outlet enters the side duct 5 of the fresh air system 100 through the side opening 202 of the bottom shell 201, enters the hollow cavity 425 in the middle of the second damper 421 through the opening 202 of the fourth damper 441, and then enters the fresh air connector 6 to be discharged outdoors.

[0073] Reference Figure 17 In one embodiment, when the fourth damper 441 rotates, the second damper 421 moves downward, and the first damper 411 moves upward, the internal circulation air inlet 33 and the fresh air outlet 11 open to form the internal circulation channel. Specifically, the first motor 412 drives the first gear 413 to rotate, and the first gear 413 meshes with the first damper 411, causing the first damper 411 to move upward, at which time the internal circulation air outlet opens. The second motor 422 drives the second gear 423 to rotate, and the second gear 423 meshes with the second damper 421, causing the second damper 421 to move downward. The third damper 431 rotates and falls under the drive of the third motor 432. The fourth motor 442 drives the fourth damper 441 to rotate outward and open. The rotation of the fan 2 drives part of the air from the air conditioner outlet to enter the side duct 5 through the side opening 202 of the bottom shell 201. It then enters the fresh air system 100 through the internal circulation air inlet 33 opened by the fourth air damper 441. After the air is filtered by the health filter 7 to remove dust and some bacteria, it enters the fan 2 axially and then exits radially, finally being discharged into the indoor side through the internal circulation air outlet.

[0074] Reference Figure 18 and Figure 19 This invention also provides a fresh air air conditioner 200, which includes the fresh air system 100 described in the above embodiments. The fresh air system 100 has been described in detail in the above embodiments, and for the sake of brevity, it will not be repeated here.

[0075] In this embodiment, the fresh air air conditioner 200 and the fresh air system 100 are designed with a fresh air inlet 34, a fresh air outlet 11, an exhaust air inlet 32, an exhaust air outlet 12, an internal circulation air inlet 33, and an internal circulation air outlet. The second exhaust air inlet 32 ​​and the internal circulation air inlet 33 are located at the same position, as are the fresh air outlet 11 and the internal circulation air outlet. The fresh air outlet 11 (internal circulation outlet) and the exhaust air inlet 32 ​​are located on the upper part of the indoor side of the air conditioner and are opened and closed by the up-and-down movement of the first damper 411. Fresh air is exhausted into the room through the fresh air outlet 11, while stale indoor air enters the fresh air system 100 through the exhaust air inlet 32. The fresh air inlet 34 and the exhaust air outlet 12 are located inside the fresh air system 100 and are opened and closed by the up-and-down movement of the second damper 421. The second exhaust air inlet 32 ​​(internal circulation air inlet 33) is located inside the side duct 5 on the side of the fresh air system 100, and is opened and closed by rotating the fourth damper 441. The movement of each damper position creates different air ducts to switch between three modes: fresh air function, exhaust air function, and indoor circulation function. This solves the problem of needing two fans 2 for bidirectional ventilation. It also solves the problem of needing two pipes and two additional wall holes for bidirectional ventilation, eliminating the need for additional pipes and drilling, and avoiding damage to the wall, resulting in a more aesthetically pleasing installation. The entire ventilation component can be designed inside the air conditioner, without affecting its appearance, and only one fresh air connector 6 is needed for convenient installation without additional wall drilling. This integrates the fresh air unit, exhaust unit, and indoor circulation unit into a single device, simplifying the structure of the fresh air system 100, improving efficiency, saving space, and simplifying installation.

[0076] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A fresh air system, characterized in that, include: The volute is equipped with a fresh air outlet and an exhaust air outlet; The fan is located inside the volute. A volute cover is provided on the volute. The volute cover has a cavity communicating with the volute. The cavity has an exhaust air inlet, an internal circulation air inlet, and a fresh air inlet. A damper assembly is used to open or close the fresh air outlet, the exhaust air outlet, the exhaust air inlet, the internal circulation air inlet, and the fresh air inlet; Specifically, when the fresh air inlet and the fresh air outlet are opened, a fresh air channel is formed between the inside of the volute and the cavity; when the exhaust air inlet and the exhaust air outlet are opened, an exhaust air channel is formed between the inside of the volute and the cavity; and when the internal circulation air inlet and the fresh air outlet are opened, an internal circulation channel is formed between the inside of the volute and the cavity. The damper assembly includes a second damper, a third damper, and a fourth damper. The exhaust outlet and the fresh air inlet are arranged vertically at intervals. The second damper can move vertically along the exhaust outlet and the fresh air inlet to open or close them. The third damper can rotate relative to the fresh air inlet to open or close it. The fourth damper can rotate relative to the internal circulation inlet to open or close it. The second damper is triangular in shape, with its two adjacent sides facing the internal circulation air inlet and the fresh air inlet, respectively. The second damper has a hollow cavity that extends through the two sides. When the fourth damper rotates, the second damper moves upward, and the third damper rotates, the internal circulation air inlet opens, and the hollow cavity connects the internal circulation air inlet and the fresh air outlet to form an auxiliary exhaust channel to activate exhaust air volume compensation.

2. The fresh air system according to claim 1, characterized in that, The damper assembly includes a first damper, and the fresh air outlet and the exhaust air inlet are arranged vertically at intervals. The first damper can move up and down along the fresh air outlet and the exhaust air inlet to open or close the fresh air outlet and the exhaust air inlet.

3. The fresh air system according to claim 2, characterized in that, When the first damper moves upward, the second damper moves downward, and the third damper rotates, the fresh air inlet and the fresh air outlet open to form the fresh air channel.

4. The fresh air system according to claim 2, characterized in that, When the first damper moves down, the second damper moves up, and the third damper rotates, the exhaust inlet and the exhaust outlet open to form the exhaust channel.

5. The fresh air system according to claim 2, characterized in that, When the fourth damper rotates, the second damper moves down, and the first damper moves up, the internal circulation air inlet and the fresh air outlet open to form the internal circulation channel.

6. The fresh air system according to claim 2, characterized in that, The damper assembly further includes a first motor and a first gear. The first damper is provided with a first rack, and the first gear meshes with the first rack. The first motor drives the first damper to move by driving the first gear to rotate; and / or The damper assembly also includes a second motor and a second gear. The second damper is provided with a second rack, and the second gear meshes with the second rack. The second motor drives the second damper to move by driving the second gear to rotate.

7. The fresh air system according to claim 1, characterized in that, The damper assembly further includes a third motor, the output shaft of which is connected to one side of the third damper; and / or The damper assembly also includes a fourth motor, the output shaft of which is connected to one side of the fourth damper.

8. The fresh air system according to claim 1, characterized in that, The fresh air system also includes a side duct, one end of which is covered by the internal circulation air inlet. The fourth damper is located at one end of the side duct and can rotate toward the inside of the side duct to open the internal circulation air inlet. The other end of the side duct is used to connect to the indoor side.

9. The fresh air system according to claim 1, characterized in that, The fresh air system also includes a fresh air connector, one end of which is covered by the fresh air inlet and the exhaust outlet, and the other end of which is used to connect to the outdoor side.

10. The fresh air system according to claim 9, characterized in that, When the second damper moves down to close the exhaust outlet and the third damper rotates to close the fresh air inlet, the second damper and the third damper block one end of the fresh air connector.

11. The fresh air system according to any one of claims 1-10, characterized in that, The fresh air system also includes a filter screen, which is inclinedly disposed in the cavity.

12. A fresh air air conditioner, characterized in that, Including the fresh air system as described in any one of claims 1-11.

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