Cyclone dust collector, fresh air device and air conditioner

Abstract

The application provides a cyclone dust collector, a fresh air device and an air conditioner, and relates to the technical field of air conditioners. The lower end of the barrel of the cyclone dust collector is provided with a floating valve to open or close the dust outlet. When the cyclone dust collector is used to remove dust from the airflow, the barrel is kept under negative pressure, the floating valve is lifted upward under the external pressure, and the dust outlet is blocked, so that the airflow can only enter from the air inlet, but not from the dust outlet, and the dust will accumulate at the dust outlet. The external gas power source (such as a fan) stops working, the negative pressure in the barrel disappears, and the floating valve will fall under the action of gravity, thereby opening the dust outlet, and the dust will be automatically discharged. The cyclone dust collector provided by the application has the function of automatically discharging dust, so it is not necessary to frequently disassemble the dust collector, thereby bringing convenience to the user. The fresh air device and the air conditioner provided by the application contain the cyclone dust collector, and thus have the beneficial effects described above.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, and more specifically, to a cyclone dust collector, a fresh air device, and an air conditioner. Background Technology

[0002] Air conditioners primarily circulate indoor air without exchanging air with the outside. To better meet user needs, air conditioners with fresh air functions have emerged, introducing outdoor air into the room through a fresh air intake system to keep the indoor air fresh. To ensure the cleanliness of the introduced fresh air, filters are often installed in the air duct. However, over time, dust accumulates on the filters, causing them to become clogged. In areas with poor air quality, frequent disassembly and cleaning of the filters can be quite troublesome. Summary of the Invention

[0003] The problem addressed by this application is the inconvenience caused by the need for regular filter cleaning in existing fresh air systems.

[0004] To address the aforementioned problems, in a first aspect, this application provides a cyclone dust collector, comprising a cylinder and a floating valve. An air inlet is provided on the outer periphery of the cylinder, and an air outlet is provided at the top of the cylinder. The cylinder includes a conical section, the inner cavity of which gradually narrows towards the bottom of the cylinder. The bottom of the cylinder has a dust discharge port communicating with the conical section. The floating valve is connected to the bottom of the cylinder and can slide relative to the cylinder along its axis. The floating valve can move towards the top of the cylinder to block the dust discharge port when a negative pressure is generated inside the cylinder, and can move away from the top of the cylinder to open the dust discharge port when the pressure inside the cylinder is normal.

[0005] In this embodiment, the lower end of the cyclone dust collector's cylinder uses a floating valve to open or close the dust discharge port. When using the cyclone dust collector to remove dust from the airflow, air is drawn in from the outlet side, maintaining a negative pressure inside the cylinder. Gas enters the cylinder from the inlet and generates a cyclone in the conical section. Particles in the swirling airflow collide with the conical cylinder wall, slowing down and no longer flowing with the gas, thus being removed from the airflow. Finally, under the action of gravity, they fall to the lower end (small end) of the conical section. Because a negative pressure is maintained inside the cylinder during the use of the cyclone dust collector, the floating valve rises under external pressure, blocking the dust discharge port. Therefore, airflow can only enter from the inlet and not from the dust discharge port, and dust accumulates at the dust discharge port. When the external gas power source (such as a fan) stops working, the negative pressure inside the cylinder disappears, the air pressure becomes the same as the external pressure, and the floating valve falls under the action of gravity, thereby opening the dust discharge port, and the accumulated dust is automatically discharged. As can be seen, the cyclone dust collector provided in this application embodiment has the function of automatically discharging dust, so it is not necessary to disassemble the dust collector frequently, which brings convenience to users.

[0006] In an optional embodiment, the floating valve includes a sealing part and a sliding connection part. The sliding connection part slides with the cylinder body, and the sealing part gradually contracts towards the top of the cylinder body to form a sealing cone surface. When the floating valve seals the dust discharge port, a portion of the sealing part extends into the dust discharge port, and the sealing cone surface abuts against the edge of the dust discharge port. In this embodiment, sealing the dust discharge port with a cone-shaped sealing part has a better sealing effect, and after the cyclone dust collector stops working, the dust accumulated on the sealing cone surface can naturally slide off under gravity.

[0007] In an optional embodiment, the projection of the sealing part onto a plane perpendicular to the axis of the cylinder is circular, and the sliding connection part is connected to the outer periphery of the sealing part.

[0008] In an optional embodiment, the sliding connection includes a surrounding plate arranged circumferentially along the sealing part, with a dust exhaust window provided on the surrounding plate, and the surrounding plate is slidably connected to the cylinder.

[0009] In an optional embodiment, the cylinder further includes a connecting cylinder, which is sleeved on the outside of the conical section. The surrounding plate of the floating valve is sleeved on the outside of the connecting cylinder or embedded between the connecting cylinder and the conical section. One of the surrounding plate and the connecting cylinder is provided with a slider, and the other is provided with a sliding groove. The slider and the sliding groove are slidably engaged. In this embodiment, the connecting cylinder and the surrounding plate of the floating valve are sleeved together, and axial sliding and circumferential limiting are achieved through the sliding groove and the slider, resulting in better stability.

[0010] In an optional embodiment, the cyclone dust collector further includes an exhaust component, which is located at the top of the cylinder and has an exhaust channel inside. One end of the exhaust channel is connected to the air outlet of the cylinder, and the other end of the exhaust channel forms an exhaust port. The direction of the exhaust port is consistent with the radial direction of the cylinder.

[0011] In an optional embodiment, the cyclone dust collector includes at least two cylinders and floating valves corresponding to the number of cylinders. One exhaust port of the exhaust component is connected to the exhaust ports of each cylinder through an exhaust channel. In this embodiment, the cyclone dust collector with multiple cylinders has a better dust removal effect, and by converging multiple exhaust ports into one exhaust port through the exhaust component, the number of fans and ducts required can be reduced, thus reducing the overall volume of the fresh air system.

[0012] In an optional embodiment, the cylinder further includes a straight section connected to the large end of the conical section and coaxial with the conical section. The air inlet is located on the outer periphery of the straight section, and the air outlet is located at the end of the straight section away from the conical section and coincides with the axis of the straight section. Since the cyclone dust collector removes particles by generating a vortex-like airflow inside the cylinder, causing the particles in the airflow to collide with the cylinder wall and be decelerated, the airflow often enters tangentially, forms a vortex against the inner wall, and exits from the center upwards. This flow field is beneficial for particulate matter removal.

[0013] Secondly, this application provides a fresh air device, including a fan, a fresh air duct, and a cyclone dust collector as described in any of the foregoing embodiments. Both the fan and the cyclone dust collector are disposed within the fresh air duct, along the airflow direction. The cyclone dust collector is positioned upstream of the fan. The fresh air duct has an outdoor opening and an indoor opening at both ends, with the outdoor opening connecting to the outside and the indoor opening connecting to the inside. In this embodiment, by positioning the cyclone dust collector upstream of the fan, negative pressure is generated within the cyclone dust collector's cylinder during fan operation. The floating valve then blocks the dust outlet and accumulates dust. After the fan stops operating, the negative pressure within the cylinder disappears, the floating valve falls and opens the dust outlet, discharging the dust, thereby achieving automatic dust removal.

[0014] In an optional embodiment, the fresh air device further includes an airflow reversing valve disposed in the fresh air duct. The airflow reversing valve is used to switch the flow direction of gas in the fresh air duct to selectively allow air to enter through the outdoor opening and exit through the indoor opening, or vice versa. In this embodiment, the airflow reversing valve can switch the operating state of the outdoor and indoor openings of the fresh air duct. When fresh air needs to be introduced into the room, air can enter through the outdoor opening and exit through the indoor opening; when indoor gas needs to be discharged to the outside, air can exit through the outdoor opening and enter through the indoor opening. The fresh air device in this embodiment achieves the exhaust function.

[0015] In an optional embodiment, the fresh air device further includes a total heat exchanger disposed in the fresh air duct, which is used for heat exchange with the airflow. In this embodiment, by setting up a total heat exchanger, when the fresh air device performs the function of exhausting air to the outside, the indoor air passes through the total heat exchanger, and the total heat exchanger exchanges heat with the air, thus making the temperature of the indoor air more consistent with that of the air supplied from the room; when the function of introducing fresh air into the room is activated, the outdoor air will again pass through the total heat exchanger, and exchange heat with the total heat exchanger. Then, the total heat exchanger transfers the heat or cold absorbed from the indoor air to the fresh air, so that the fresh air has a temperature similar to that of the indoor air before replacement. It can be seen that this fresh air device can keep the indoor temperature as close as possible to that before replacement after the indoor and outdoor air are replaced, thereby improving the user experience.

[0016] In an alternative implementation, the total heat exchanger is located downstream of the fan.

[0017] Thirdly, this application provides an air conditioner that includes a fresh air device according to any of the foregoing embodiments. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a cyclone dust collector in one embodiment of this application;

[0019] Figure 2This is an exploded view of a cyclone dust collector in one embodiment of this application;

[0020] Figure 3 This is a first schematic diagram of gas flow inside a cyclone dust collector in one embodiment of this application;

[0021] Figure 4 This is a second schematic diagram of gas flow inside a cyclone dust collector in one embodiment of this application;

[0022] Figure 5 This is a schematic diagram of a floating valve in one embodiment of this application;

[0023] Figure 6 This is a schematic diagram of the cooperation between the floating valve and the lower end of the cylinder when the dust discharge port is open in one embodiment of this application;

[0024] Figure 7 This is a schematic diagram of the cooperation between the floating valve and the lower end of the cylinder when the dust outlet is closed in one embodiment of this application;

[0025] Figure 8 This is a schematic diagram of a cyclone dust collector in another embodiment of this application;

[0026] Figure 9 This is a schematic diagram of the fresh air device in one embodiment of this application when the exhaust function is activated;

[0027] Figure 10 This is a schematic diagram of the fresh air device in one embodiment of this application when the fresh air function is activated;

[0028] Figure 11 This is an exploded view of a fresh air device in one embodiment of this application;

[0029] Figure 12 This is a schematic diagram of a fresh air device installed on the outdoor unit of an air conditioner in one embodiment of this application.

[0030] Explanation of reference numerals in the attached drawings: 010-Fresh air unit; 100-Cyclone dust collector; 110-Cylinder body; 111-Straight section; 112-Conical section; 113-Connecting cylinder; 114-Air inlet; 115-Air outlet; 116-Dust discharge port; 117-Slide groove; 120-Floating valve; 121-Sealing part; 122-Sealing cone surface; 123-Enclosure plate; 124-Dust discharge window; 125-Slider; 130-Exhaust component; 131-Exhaust outlet; 200-Fan; 300-Total heat exchanger; 400-Airflow reversing valve; 020-Outdoor unit. Detailed Implementation

[0031] To ensure the cleanliness of the incoming fresh air, existing fresh air systems often install filters in the air duct. However, dust accumulates on the filters over time, causing them to become clogged. In areas with poor air quality, frequent disassembly and cleaning of the filters is quite troublesome.

[0032] To address the issue of frequent cleaning required when using filters to filter fresh air in existing technologies, embodiments of this application provide a cyclone dust collector that automatically removes accumulated dust when not in operation, offering convenience to users. Embodiments of this application also provide a fresh air system and an air conditioner incorporating the aforementioned cyclone dust collector.

[0033] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, specific embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0034] Figure 1 This is a schematic diagram of a cyclone dust collector 100 in one embodiment of this application; Figure 2 This is an exploded view of a cyclone dust collector 100 in one embodiment of this application. Figure 1 and Figure 2 As shown in the illustration, an embodiment of this application provides a cyclone dust collector 100, including a cylindrical body 110 and a floating valve 120. The cylindrical body 110 has a chamber for gas flow, and is further provided with an air inlet 114, an air outlet 115, and a dust discharge port 116 communicating with the chamber. Airflow enters through the air inlet 114 and exits through the air outlet 115, while the dust discharge port is used to discharge dust. The floating valve 120 is located at the dust discharge port 116 to open or close the dust discharge port 116. Optionally, the cyclone dust collector 100 also includes an exhaust component 130, which is located at the top of the cylindrical body 110. The exhaust component 130 has an exhaust channel, one end of which communicates with the air outlet 115 of the cylindrical body 110, and the other end of which forms an exhaust port 131. Optionally, the orientation of the exhaust port 131 is consistent with the radial direction of the cylindrical body 110.

[0035] Figure 3 This is a first schematic diagram of gas flow inside the cyclone dust collector 100 in one embodiment of this application; Figure 4 This is a second schematic diagram of gas flow within the cyclone dust collector 100 in one embodiment of this application. In this embodiment, the air inlet 114 is located on the outer periphery of the cylinder 110 to achieve tangential air intake and create a vortex airflow within the cylinder 110. The air outlet 115 is located at the top of the cylinder 110. In this embodiment, the cylinder 110 includes a straight section 111 and a conical section 112. The inner cavity of the conical section 112 gradually narrows towards the bottom, and the dust discharge port 116 is located at the bottom of the cylinder 110, specifically at the small end of the conical section 112. Figure 3The straight section 111 is axially connected to the large end of the conical section 112 and is coaxial with the conical section 112. The air inlet 114 is specifically located on the outer periphery of the straight section 111, and the air outlet 115 is located at the end of the straight section 111 away from the conical section 112, and the central axis of the air outlet 115 coincides with the axis of the straight section 111. Since the cyclone dust collector 100 removes particles by generating a vortex-like airflow inside the cylinder 110, causing the particles in the airflow to collide with the cylinder wall and be decelerated, the airflow is often tangentially inlet, forming a vortex against the inner wall, and then exiting from the middle upwards. This flow field is conducive to the removal of particulate matter (components of dust). As shown in the figure, the exhaust component 130 is connected to the top of the straight section 111 and guides the airflow from the air outlet 115 to radial outlet through the exhaust channel. In this embodiment, optionally, the exhaust port 131 on the exhaust component 130 and the air inlet 114 on the cylinder 110 are parallel in orientation, which facilitates the assembly of the cyclone dust collector 100.

[0036] In this embodiment, the floating valve 120 is connected to the bottom end of the cylinder 110 and can slide relative to the cylinder 110 along its axis. The floating valve 120 can move towards the top of the cylinder 110 to block the dust outlet 116 when a negative pressure is generated inside the cylinder 110, and can move away from the top of the cylinder 110 to open the dust outlet 116 when the pressure inside the cylinder 110 is normal. Specifically, in this example, the cylinder 110 also includes a connecting cylinder 113, which is sleeved on the outside of the tapered section 112, and the floating valve 120 slides in conjunction with the connecting cylinder 113.

[0037] Figure 5 This is a schematic diagram of the floating valve 120 in one embodiment of this application; Figure 6 This is a schematic diagram of the cooperation between the floating valve 120 and the lower end of the cylinder 110 when the dust discharge port 116 is open in one embodiment of this application; Figure 7 This is a schematic diagram illustrating the interaction between the floating valve 120 and the lower end of the cylinder 110 when the dust outlet 116 is closed, according to one embodiment of this application. Figures 5 to 7As shown, the floating valve 120 in this embodiment includes a blocking part 121 and a sliding connection part. The sliding connection part is slidably engaged with the cylinder 110, specifically with the connecting cylinder 113 of the cylinder 110. The blocking part 121 gradually contracts towards the top of the cylinder 110 to form a blocking cone surface 122. When the floating valve 120 blocks the dust discharge port 116, a portion (the top) of the blocking part 121 extends into the dust discharge port 116, and the blocking cone surface 122 abuts against the edge of the dust discharge port 116. When the blocking part 121 opens the dust discharge port 116, a gap exists between the blocking cone surface 122 and the edge of the dust discharge port 116, and dust will fall out from the gap. In this embodiment, the dust outlet 116 is sealed by the conical sealing part 121, which has a better sealing effect. After the cyclone dust collector 100 stops working, the dust accumulated on the sealing cone surface 122 is difficult to stay on the sealing cone surface 122 and can slide off naturally under the action of gravity.

[0038] In this embodiment, the projection of the sealing portion 121 onto a plane perpendicular to the axis of the cylinder 110 is circular, and the sliding connection portion is connected to the outer periphery of the sealing portion 121. In this embodiment, the sliding connection portion includes a surrounding plate 123 arranged circumferentially along the sealing portion 121, and a dust discharge window 124 is provided on the surrounding plate 123. The surrounding plate 123 is slidably connected to the cylinder 110. Dust sliding off the sealing cone surface 122 can be discharged through the dust discharge window 124. The surrounding plate 123 is sleeved on the outside of the connecting cylinder 113 or embedded between the connecting cylinder 113 and the conical section 112. Specifically, in this embodiment, the surrounding plate 123 is embedded between the connecting cylinder 113 and the conical section 112, and the outer side of the surrounding plate 123 is in contact with the inner side of the connecting cylinder 113. One of the enclosure plate 123 and the connecting cylinder 113 is provided with a slider 125, and the other is provided with a sliding groove 117. The slider 125 and the sliding groove 117 are slidably engaged. Specifically, in this embodiment, the slider 125 is located on the outer side of the enclosure plate 123, and the sliding groove 117 is located on the inner side of the connecting cylinder 113. The extension direction of the sliding groove 117 is consistent with the extension direction of the cylinder 110. In this embodiment, the connecting cylinder 113 and the enclosure plate 123 of the floating valve 120 are sleeved together, and axial sliding and circumferential limiting are achieved through the sliding groove 117 and the slider 125, which has better stability.

[0039] In this embodiment, the lower end of the cylinder 110 of the cyclone dust collector 100 is opened or closed via a floating valve 120 to control the dust discharge port 116. When using the cyclone dust collector 100 to remove dust from the airflow, air is drawn in from the outlet 115 side, maintaining a negative pressure inside the cylinder 110. Gas enters the cylinder 110 from the inlet 114 and generates a cyclone in the cavity of the conical section 112. Particles in the swirling airflow collide with the conical cylinder wall and slow down, no longer flowing with the gas, thus being removed from the airflow. Finally, under the action of gravity, they fall to the lower end (small end) of the conical section 112. Because the cylinder 110 maintains a negative pressure during the use of the cyclone dust collector 100, the floating valve 120 is lifted upward under external pressure, blocking the dust discharge port 116. Therefore, the airflow can only enter from the inlet 114 and will not enter from the dust discharge port 116, and dust will accumulate at the dust discharge port 116. When the external gas power source (such as the fan 200) stops working, the negative pressure inside the cylinder 110 disappears, and the air pressure becomes the same as the outside. The floating valve 120 will fall under the action of gravity, thereby opening the dust discharge port 116, and the accumulated dust will be automatically discharged. It can be seen that the cyclone dust collector 100 provided in this embodiment of the application has the function of automatically discharging dust, so it is not necessary to frequently disassemble the dust collector, which brings convenience to the user.

[0040] In this embodiment, the dimensions of the cyclone dust collector 100 should be determined proportionally based on the principle of optimal dust collection efficiency. Furthermore, it should be ensured that when the cyclone dust collector 100 is operating, the negative pressure inside the cylinder 110 is sufficient to cause the dust discharge port 116 to suck up and block the floating valve 120. For example, parameters such as the size of the air inlet 114 and the power of the fan 200 can be determined based on a suction velocity of 20-25 m / s.

[0041] Figure 8 This is a schematic diagram of a cyclone dust collector 100 in another embodiment of this application. Figure 8 As shown, optionally, the cyclone dust collector 100 includes at least two cylinders 110 and floating valves 120 corresponding to the number of cylinders 110. An exhaust port 131 of the exhaust component 130 is connected to the exhaust port 115 of each cylinder 110 via an exhaust channel. Specifically... Figure 8 In this embodiment, the cyclone dust collector 100 includes two cylinders 110, two floating valves 120, and an exhaust component 130. The cyclone dust collector 100, with multiple cylinders 110, has a better dust removal effect, and by converging multiple air outlets 115 into a single exhaust outlet 131 via the exhaust component 130, the number of fans 200 and ducts required can be reduced, thus reducing the overall size of the device. Furthermore, in this embodiment, the air inlet 114 can also be integrated into a single component, separated into two ducts leading to the two cylinders 110 respectively by a partition plate.

[0042] Figure 9This is a schematic diagram of the fresh air device 010 in one embodiment of this application when the exhaust function is activated; Figure 10 This is a schematic diagram of the fresh air device 010 in one embodiment of this application when the fresh air function is activated; Figure 11 This is an exploded view of a fresh air device 010 in one embodiment of this application. Figures 9 to 11 As shown, in this embodiment, the fresh air device 010 includes a fan 200, a fresh air duct, a cyclone dust collector 100, a total heat exchanger 300, and an airflow reversing valve 400. The fan 200, cyclone dust collector 100, total heat exchanger 300, and airflow reversing valve 400 are all disposed in the fresh air duct, and along the airflow direction, the cyclone dust collector 100 is disposed upstream of the fan 200. The two ends of the fresh air duct have an outdoor opening and an indoor opening, respectively. The outdoor opening is used to connect to the outside, and the indoor opening is used to connect to the inside. In this embodiment, by placing the cyclone dust collector 100 upstream of the fan 200, the fan 200 can generate negative pressure in the cylinder 110 of the cyclone dust collector 100 when it is running. The floating valve 120 can block the dust discharge port 116 and accumulate dust. After the fan 200 stops running, the negative pressure in the cylinder 110 disappears, the floating valve 120 falls and opens the dust discharge port 116 to discharge dust, thereby achieving automatic dust removal.

[0043] In this embodiment, the airflow reversing valve 400 is used to switch the flow direction of gas in the fresh air duct, so as to selectively allow air to enter through the outdoor opening and exhaust through the indoor opening. Figure 10 (as shown), or, outdoor exhaust opening and indoor intake opening (as shown). Figure 9 (As shown). In this embodiment, the working state of the outdoor and indoor openings of the fresh air duct can be switched by the airflow reversing valve 400. When fresh air needs to be introduced into the room, the outdoor opening can be used to allow air to enter and the indoor opening to exhaust; when the indoor air needs to be discharged to the outside, the outdoor opening can be used to exhaust and the indoor opening can be used to allow air to enter. The fresh air device 010 in this embodiment can realize both fresh air and exhaust functions. However, it should be noted that whether it is a fresh air function or an exhaust function, the airflow direction in the cyclone dust collector 100 and the fan 200 remains unchanged. The airflow reversing valve 400 can only adjust the airflow direction in a portion of the fresh air duct.

[0044] In this embodiment, the total heat exchanger 300 is located downstream of the fan 200. The total heat exchanger 300 is used for heat exchange with the airflow. In this embodiment, by setting up the total heat exchanger 300, when the fresh air device 010 performs the exhaust function of exhausting air to the outside, the indoor air passes through the total heat exchanger 300, and the total heat exchanger 300 exchanges heat with the air, so that the temperature of the air is close to that of the air supplied from the room; when the fresh air function of introducing fresh air into the room is turned on, the outdoor air will again pass through the total heat exchanger 300, and exchange heat with the total heat exchanger 300. Then, the total heat exchanger 300 transfers the heat or cold absorbed from the indoor air to the fresh air, so that the fresh air has a temperature close to that of the indoor air before replacement. It can be seen that the fresh air device 010 can keep the indoor temperature as close as possible to that before replacement after the indoor and outdoor air are replaced, thereby improving the user experience. Optionally, the total heat exchanger 300 can also have a humidity exchange function. For example, during exhaust function, it absorbs moisture from indoor air, and during fresh air function, it transfers the absorbed moisture to fresh air and sends it into the room, maintaining a better indoor humidity. It should be understood that the total heat exchanger 300 provided in this embodiment is located downstream of the fan 200, which ensures that the airflow passing through the total heat exchanger 300 is dust-removed, preventing impurities in the airflow from accumulating in the total heat exchanger 300. In other optional embodiments, the total heat exchanger 300 can also be located at other locations in the fresh air duct, such as between the fan 200 and the cyclone dust collector 100, or even at an indoor or outdoor opening.

[0045] Specifically, the fresh air unit 010 can be controlled in the following ways:

[0046] If the difference between the indoor temperature and the target temperature is below the preset temperature (e.g., 3°C), and no fresh air operation has been performed recently (e.g., within 1 hour), the indoor air quality is considered to have declined, and the fresh air unit 010 will activate to replace the indoor air. After a preset time (e.g., 45 minutes), the fresh air operation stops, indicating that the indoor air quality has met the requirements. The fresh air unit 010 can start operating from exhaust. If the temperature of the total heat exchanger 300 is sufficiently close to the exhaust temperature (e.g., within ±α of the exhaust temperature), it switches to fresh air function via the airflow reversing valve 400. Then, if the temperature of the total heat exchanger 300 is sufficiently close to the outdoor air temperature (e.g., within ±α of the outdoor air temperature), it switches back to exhaust function, thus ensuring full utilization of the total heat exchanger 300. Alternatively, exhaust and air supply (fresh air supply) can be alternated at certain time intervals, stopping indoor air replacement after a preset time. Furthermore, indoor air quality can be detected by sensors (e.g., dust and carbon dioxide sensors), and the sensor feedback information can be used as the condition for activating the fresh air unit 010.

[0047] This application also provides an air conditioner, including the fresh air device 010 provided in the above embodiments of this application. Figure 12 This is a schematic diagram of a fresh air device 010 installed on the outdoor unit 020 of an air conditioner in one embodiment of this application. Figure 12 As shown, the fresh air device 010 provided in this application embodiment can be installed on the outdoor unit 020 of the air conditioner. The fan 200, air duct reversing valve 400, total heat exchanger 300, etc. of the fresh air device 010 can be installed inside the casing of the outdoor unit 020 for protection, while the cyclone dust collector 100 can be installed outside the casing to facilitate dust discharge.

[0048] It should be understood that the fresh air device 010 provided in this application embodiment may also be used independently rather than on an air conditioner; similarly, the cyclone dust collector 100 provided in this application embodiment may also be used in other devices, and is not limited to the fresh air device 010 provided in this application embodiment.

[0049] In summary, in this embodiment of the cyclone dust collector 100, the lower end of the cylinder 110 uses a floating valve 120 to open or close the dust discharge port 116. When using the cyclone dust collector 100 to remove dust from the airflow, a negative pressure is maintained inside the cylinder 110. Under external pressure, the floating valve 120 rises, blocking the dust discharge port 116. Therefore, airflow can only enter from the air inlet 114 and not from the dust discharge port 116, and dust accumulates at the dust discharge port 116. After the external gas power source (such as the fan 200) stops working, the negative pressure inside the cylinder 110 disappears, and the floating valve 120 falls under gravity, thereby opening the dust discharge port 116, and the accumulated dust is automatically discharged. Therefore, the cyclone dust collector 100 provided in this embodiment has the function of automatically discharging dust, thus eliminating the need for frequent disassembly of the dust collector and providing convenience for users. The fresh air device 010 and the air conditioner provided in this application embodiment are both equipped with the above-mentioned cyclone dust collector 100, and therefore also have corresponding beneficial effects.

[0050] While this application discloses the above information, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of this application; therefore, the scope of protection of this application shall be determined by the scope defined in the claims.

Claims

1. A fresh air device, characterized in that The system includes a fan (200), a fresh air duct, and a cyclone dust collector (100). The fan (200) and the cyclone dust collector (100) are both located in the fresh air duct and are arranged along the airflow direction. The cyclone dust collector (100) is located upstream of the fan (200). The fresh air duct has an outdoor opening and an indoor opening at both ends. The outdoor opening is used to connect to the outside, and the indoor opening is used to connect to the inside. The cyclone dust collector (100) includes a cylindrical body (110) and a floating valve (120). An air inlet (114) is provided on the outer periphery of the cylindrical body (110), and an air outlet (115) is provided at the top of the cylindrical body (110). The cylindrical body (110) includes a conical section (112), the inner cavity of which gradually narrows towards the bottom of the cylindrical body. The bottom of the cylindrical body (110) has a dust discharge port (116) communicating with the conical section (112). The floating valve (120) is connected to the bottom end of the cylinder (110) and can slide relative to the cylinder (110) along the axis of the cylinder (110). The floating valve (120) can move towards the top of the cylinder (110) to block the dust discharge port (116) when a negative pressure is generated inside the cylinder (110), and can move away from the top of the cylinder (110) to open the dust discharge port (116) when the pressure inside the cylinder (110) is normal. The fresh air device (010) further includes a duct reversing valve (400) disposed in the fresh air duct. The duct reversing valve (400) is used to switch the flow direction of the gas in the fresh air duct to selectively allow air to enter through the outdoor opening and exhaust through the indoor opening, or allow air to exhaust through the outdoor opening and enter through the indoor opening.

2. The fresh air device according to claim 1, characterized in that, The floating valve (120) includes a blocking part (121) and a sliding connection part. The sliding connection part is slidably engaged with the cylinder (110). The blocking part (121) gradually contracts towards the top of the cylinder (110) to form a blocking cone surface (122). When the floating valve (120) blocks the dust discharge port (116), a portion of the blocking part (121) extends into the dust discharge port (116), and the blocking cone surface (122) abuts against the edge of the dust discharge port (116).

3. The fresh air device according to claim 2, characterized in that, The projection of the sealing part (121) on a plane perpendicular to the axis of the cylinder (110) is circular, and the sliding connection part is connected to the outer periphery of the sealing part (121).

4. The fresh air device according to claim 3, characterized in that, The sliding connection includes a surrounding plate (123) arranged circumferentially along the sealing part (121), and a dust exhaust window (124) is provided on the surrounding plate (123). The surrounding plate (123) is slidably connected to the cylinder (110).

5. The fresh air device according to claim 4, characterized in that, The cylinder (110) also includes a connecting cylinder (113), which is sleeved on the outside of the conical section (112). The surrounding plate (123) of the floating valve (120) is sleeved on the outside of the connecting cylinder (113) or embedded between the connecting cylinder (113) and the conical section (112). One of the surrounding plate (123) and the connecting cylinder (113) is provided with a slider (125), and the other is provided with a groove (117). The slider (125) and the groove (117) slide in cooperation.

6. The fresh air device according to any one of claims 1-5, characterized in that, The cyclone dust collector (100) also includes an exhaust component (130), which is located at the top of the cylinder (110). The exhaust component (130) has an exhaust channel inside, one end of which is connected to the air outlet (115) of the cylinder (110), and the other end of which forms an exhaust port (131). The orientation of the exhaust port (131) is consistent with the radial direction of the cylinder (110).

7. The fresh air device according to claim 6, characterized in that, The cyclone dust collector (100) includes at least two cylinders (110) and floating valves (120) corresponding to the number of cylinders (110). One of the exhaust ports (131) of the exhaust component (130) is connected to the air outlets (115) of each cylinder (110) through the exhaust channel.

8. The fresh air device according to any one of claims 1-5, characterized in that, The cylindrical body (110) further includes a straight cylindrical section (111), which is connected to the large end of the tapered section (112) and is coaxial with the tapered section (112). The air inlet (114) is located on the outer periphery of the straight cylindrical section (111), and the air outlet (115) is located at the end of the straight cylindrical section (111) away from the tapered section (112) and coincides with the axis of the straight cylindrical section (111).

9. The fresh air device according to claim 1, characterized in that, The fresh air device (010) also includes a total heat exchanger (300) disposed in the fresh air duct, the total heat exchanger (300) being used to exchange heat with the airflow.

10. An air conditioner characterized by comprising: The fresh air device (010) includes any one of claims 1-9.

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