Air conditioner

Abstract

The utility model discloses an air conditioner, air conditioner includes: casing, heat exchanger, fresh air duct piece, fan assembly, fan assembly is located in the fresh air duct piece, and fan assembly drives outdoor fresh air to enter the fresh air duct piece from fresh air import, and flows into the indoor through fresh air export, fan assembly includes axial flow fan and centrifugal fan, and axial flow fan is adjacent air duct import, and centrifugal fan is located axial flow fan's far side from air duct import, be equipped with the flow guide grating in the fresh air duct piece, and the flow guide grating is located between centrifugal fan and axial flow fan, and the flow guide grating guides outdoor fresh air from axial flow fan to centrifugal fan and adjusts the flow direction of outdoor fresh air. The flow guide grating of the utility model can guide the air outlet of axial flow fan, to make the airflow of passing through the flow guide grating by the direction of rotation guide flow for axial, to recover the rotational dynamic pressure of airflow, improve static pressure, be favorable to improve the air intake efficiency of centrifugal fan, and can improve the air guide volume of fan assembly, and the air guide effect is better.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, and in particular to an air conditioner. Background Technology

[0002] Air conditioners in related technologies typically include a heat exchanger, a fresh air duct component, and a fan assembly. The fresh air duct component has a fresh air duct, and the fan assembly is located inside the fresh air duct. Driven by the fan assembly, outdoor fresh air can enter the casing through the fresh air inlet and flow into the room from the fresh air outlet after exchanging heat with the heat exchanger.

[0003] Furthermore, the fan components in the relevant technology typically include axial fans and centrifugal fans, both of which are located in the fresh air duct. The combined drive of the axial fans and centrifugal fans can increase the air volume delivered by the air conditioner.

[0004] However, in related technologies, the airflow from the axial fan is directly directed to the centrifugal fan, and the airflow from the axial fan rotates relative to the axis of the centrifugal fan. This results in lower intake efficiency of the centrifugal fan, poorer airflow guidance effect of the centrifugal fan, and unsatisfactory overall airflow guidance effect of the fan assembly. Utility Model Content

[0005] This utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of this utility model is to provide an air conditioner in which the airflow guide grille can guide the airflow from the axial fan, so that the airflow passing through the guide grille can be guided axially from the direction of rotation, thereby recovering the rotational dynamic pressure of the airflow, increasing the static pressure, which is beneficial to improving the intake efficiency of the centrifugal fan, and thus increasing the airflow volume of the fan assembly, resulting in better airflow guidance.

[0006] To achieve the above objectives, an air conditioner is proposed according to an embodiment of the present invention. The air conditioner includes: a housing, the housing having a fresh air inlet and a fresh air outlet, an air inlet and an air outlet; a heat exchanger, the heat exchanger being disposed within the housing, indoor air entering the housing through the air inlet, and flowing into the room through the air outlet after exchanging heat with the heat exchanger; a fresh air duct component, the fresh air duct component being disposed within the housing, and the fresh air duct component having a fresh air channel constructed therein, the fresh air channel being connected to the fresh air inlet and the fresh air outlet respectively; and a fan assembly, the fan assembly being disposed within the fresh air duct component, and the... A fan assembly drives outdoor fresh air to enter the fresh air duct from the fresh air inlet and flow into the room through the fresh air outlet. The fan assembly includes: an axial fan disposed within the fresh air duct and adjacent to the duct inlet; and a centrifugal fan disposed within the fresh air duct and located on the side of the axial fan away from the duct inlet. The fresh air duct is provided with: a flow guide grille disposed between the centrifugal fan and the axial fan, which guides the outdoor fresh air from the axial fan to the centrifugal fan and adjusts the flow direction of the outdoor fresh air.

[0007] The above technical solution has the following advantages or beneficial effects: It is understood that the outdoor fresh air blown out by the axial fan will be driven by the fan blades of the axial fan to rotate relative to the axial axis of the axial fan. That is, the outdoor fresh air flowing out from the axial fan will rotate relative to the axial axis of the centrifugal fan. At this time, it is not conducive to the air intake of the centrifugal fan. This application sets a guide grille between the centrifugal fan and the axial fan. The guide grille can guide the outdoor fresh air blown out by the axial fan to change the airflow direction of the axial fan. The outdoor fresh air can enter along the axial axis of the centrifugal fan. This can recover the rotational dynamic pressure of the airflow and increase the static pressure to improve the air guiding effect of the centrifugal fan. The air intake efficiency of the centrifugal fan can be higher, which can further increase the air volume of the fan assembly. Under the joint drive of the axial fan and the centrifugal fan, the air volume of the air conditioner can be greatly increased, resulting in a better user experience.

[0008] According to some embodiments of the present invention, the flow guide grille is provided with a plurality of first flow guide ribs arranged at intervals along the circumference. The first flow guide ribs extend radially along the flow guide grille and include: an arc-shaped air guide section that extends arc-shaped along the axial direction of the flow guide grille and close to the centrifugal fan; and a planar air guide section that is connected to the end of the arc-shaped air guide section close to the centrifugal fan and is parallel to the axial direction of the flow guide grille.

[0009] The above technical solution has the following advantages or beneficial effects: By setting an arc-shaped air guide section, the airflow from the axial fan can be guided more naturally. Outdoor fresh air can flow more smoothly along the arc-shaped air guide section, avoiding collisions between the airflow and the air guide grille, thus reducing vibration and noise generated by the airflow. Furthermore, guided by the planar air guide section, outdoor fresh air can flow along the axial direction of the centrifugal fan, preventing the outdoor fresh air flowing into the centrifugal fan from rotating relative to it, thereby improving the intake efficiency of the centrifugal fan and enhancing its air guiding effect.

[0010] According to some embodiments of the present invention, the flow guide grille is provided with a plurality of second flow guide ribs arranged at intervals along the circumference. The second flow guide ribs are located radially inside the first flow guide ribs and extend radially along the flow guide grille and are parallel to the axial direction of the flow guide grille.

[0011] The above technical solution has the following advantages or beneficial effects: it can guide the outdoor fresh air by using the second guide rib, so that the outdoor fresh air flows into the centrifugal fan along the axis, and it can also simplify the processing technology of the second guide rib, making it easier to process the second guide rib and improve processing efficiency.

[0012] According to some embodiments of the present invention, along the axial direction of the axial fan, the distance between the guide grille and the axial fan is L1, and L1 satisfies: 5mm≤L1≤15mm.

[0013] The above technical solution has the following advantages or beneficial effects: This setting can avoid the gap between the air guide grille and the axial fan being too small, so that the outdoor fresh air can flow smoothly into the air guide grille, and can also reduce the noise generated by the flow of outdoor fresh air. It can also avoid the gap between the air guide grille and the axial fan being too large, so that the outdoor fresh air blown out by the axial fan can flow smoothly into the air guide grille. Under the guidance of the air guide grille, the air guiding efficiency of the centrifugal fan can be improved, thereby improving the energy efficiency of the air conditioner. In addition, it can also reduce the overall size of the fresh air duct component, making it easier to install and fix the fresh air duct component.

[0014] According to some embodiments of the present invention, the outer diameter of the flow guide grille is D1, the blade diameter of the axial fan is D2, and D1 and D2 satisfy: D2≤D1≤1.1×D2.

[0015] The above technical solution has the following advantages or beneficial effects: it can ensure that all the outdoor fresh air blown out by the axial fan can flow to the guide grille to ensure the guide efficiency of the guide grille, and it can also ensure that the outdoor fresh air introduced by the axial fan is sufficient to ensure that the overall air volume of the outdoor fresh air introduced by the fan assembly is large.

[0016] According to some embodiments of the present invention, the fresh air duct component is further provided with a guide ring, the guide ring being fixed inside the fresh air duct and disposed on the side of the guide grille facing the axial fan, and a portion of the axial fan being disposed inside the guide ring.

[0017] The above technical solution has the following advantages or beneficial effects: With this configuration, the air guide ring can be fixed by the air guide grille, and the air guide ring can collect the airflow and guide the airflow generated by the axial fan, thereby guiding the outdoor fresh air to the centrifugal fan, further improving the air intake efficiency of the centrifugal fan, and the air guiding effect of the fan assembly is better.

[0018] According to some embodiments of the present invention, the blade diameter of the axial fan is D2, the inner diameter of the guide ring is D3, and D2 and D3 satisfy: 1.05×D2≤D3≤1.1×D2.

[0019] The above technical solution has the following advantages or beneficial effects: it can avoid the inner diameter of the guide ring being too large, so that the radial gap between the guide ring and the blades of the axial fan can be smaller, thus avoiding excessive air leakage from the gap; and it can also avoid the inner diameter of the guide ring being too small, so that the radial gap between the guide ring and the blades of the axial fan can be larger, thereby reducing noise.

[0020] According to some embodiments of the present invention, the dimension of the axial fan along the axial direction of the axial fan is T, and the axial dimension of the axial fan outside the guide ring is t, and t and T satisfy: T / 5≤t≤T / 2.

[0021] The above technical solution has the following advantages or beneficial effects: it can avoid the axial dimension of the axial fan exposed outside the guide ring being too small or too large, so as to ensure that the air volume of the axial fan can be large, thereby increasing the air volume of the centrifugal fan and the air volume of the fan assembly can be large.

[0022] According to some embodiments of the present invention, the air conditioner further includes: a filter screen, the filter screen being disposed inside the fresh air duct component and located on the side of the axial fan facing away from the centrifugal fan, and along the axial direction of the axial fan, the distance between the filter screen and the axial fan being L2, where L2 satisfies: 5mm≤L2≤20mm.

[0023] The above technical solution has the following advantages or beneficial effects: the filter can filter the outdoor fresh air flowing into the fresh air duct to ensure the cleanliness of the air supplied by the air conditioner, which is conducive to improving the quality of indoor air. It can also reduce the entry of dust and impurities into the casing, which can cause blockage, corrosion and wear to components such as the motor. Moreover, by using 5mm≤L2≤20mm, it is possible to avoid the gap between the filter and the axial fan being too small, which would prevent abnormal noise when the outdoor fresh air flows from the filter to the axial fan, and also to avoid the gap being too large, which would allow for a more compact assembly of the filter and the axial fan. This results in a smaller overall size of the fresh air duct component, making it easier to install and fix the fresh air duct component.

[0024] According to some embodiments of the present invention, the fan assembly further includes a first motor, which drives the axial fan and the centrifugal fan to rotate; or, the fan assembly further includes two second motors, which drive the axial fan and the centrifugal fan to rotate respectively in a one-to-one correspondence.

[0025] The above technical solution has the following advantages or beneficial effects: In other words, the axial fan and centrifugal fan can be driven to rotate synchronously by a first motor, resulting in a simple structure. Alternatively, the axial fan can be driven by one second motor, and the centrifugal fan by another second motor; that is, the axial fan and centrifugal fan are two separate fans. This way, there is no structural interference between the axial fan and the centrifugal fan, allowing them to operate independently, and the speed of each individual fan can be adjusted separately.

[0026] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0027] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a structural schematic diagram of the new air duct component according to an embodiment of the present utility model; Figure 2 This is a structural cross-sectional view of the fresh air duct and fan assembly according to an embodiment of the present utility model; Figure 3 This is an exploded view of the fresh air duct and fan assembly according to an embodiment of the present utility model; Figure 4 This is a structural schematic diagram of some of the fresh air duct components according to an embodiment of the present utility model; Figure 5 This is a schematic diagram of the structure of some of the new air duct components according to an embodiment of the present utility model from another perspective; Figure 6 This is another perspective structural schematic diagram of some of the fresh air duct components according to an embodiment of the present utility model; Figure 7 yes Figure 6 An enlarged schematic diagram of the structure at point A.

[0028] Figure label: 200. Fresh air duct components; 210. Fresh air duct; 211. Duct inlet; 212. Duct outlet; 300. Fan assembly; 310. Axial fan; 320. Centrifugal fan; 400. Airflow guide grille; 410. First airflow guide rib; 411. Arc-shaped airflow guide section; 412. Planar airflow guide section; 420. Second airflow guide rib; 430. Connecting ring; 500, airflow guide ring; 600, Filter screen; 710, First motor; 720, Motor shaft. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0030] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0031] In the description of this utility model, "first feature" and "second feature" may include one or more of the features.

[0032] In the description of this utility model, "multiple" means two or more, and "several" means one or more.

[0033] An air conditioner according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0034] like Figures 1-7As shown, the air conditioner according to an embodiment of the present invention may include a housing, which has a fresh air inlet and a fresh air outlet, so that outdoor fresh air can flow into the housing through the fresh air inlet and flow into the room through the fresh air outlet. The housing also has an air inlet and an air outlet, so that indoor air can enter the housing through the air inlet and flow back into the room through the air outlet.

[0035] An air conditioner may include a heat exchanger located inside a housing. The housing may also contain an indoor fan that drives indoor air to enter the housing from the air inlet and, after exchanging heat with the heat exchanger, flows into the room from the air outlet to heat or cool the room.

[0036] The air conditioner may include a fresh air duct component 200, which is housed within the casing and contains a fresh air duct 210. The fresh air duct 210 is connected to both a fresh air inlet and a fresh air outlet. Specifically, the duct inlet 211 of the fresh air duct 210 is connected to the fresh air inlet, and the duct outlet 212 is connected to the fresh air outlet. This configuration allows outdoor fresh air flowing in from the fresh air inlet to first enter the fresh air duct component 200 through the duct inlet 211 and flow along the fresh air duct 210. Guided by the fresh air duct 210, the outdoor fresh air flows more orderly, thereby reducing the flow resistance of the outdoor fresh air.

[0037] Furthermore, the fresh air duct component 200 can be provided with multiple air duct outlets 212, which can be arranged at intervals along the circumference of the fresh air duct component 200, and the housing can be provided with multiple fresh air outlets, so that outdoor fresh air can be discharged into the room through the multiple air duct outlets 212 and the multiple fresh air outlets in a corresponding manner.

[0038] The air conditioner may include a fan assembly 300, which is located in the fresh air duct 200. The fan assembly 300 drives outdoor fresh air to enter the fresh air duct 200 from the fresh air inlet and flow into the room through the fresh air outlet.

[0039] In other words, the fan assembly 300 of this utility model embodiment is a fan used to introduce outdoor fresh air. Driven by the fan assembly 300, outdoor fresh air can be drawn into the fresh air duct 200 through the fresh air duct component 200. In this way, outdoor fresh air can be used to purify indoor air. Furthermore, driven by the fan assembly 300, the flow rate of outdoor fresh air can be increased to improve the efficiency of introducing outdoor fresh air and achieve better purification effect.

[0040] In summary, in this embodiment of the present invention, the outdoor fresh air and the indoor air can be two separate flow paths. That is, the outdoor fresh air can flow directly into the room through the fresh air inlet, the air duct inlet 211, the air duct outlet 212 and the fresh air outlet in sequence. The outdoor fresh air does not participate in heat exchange, while the indoor air can enter the shell through the air inlet and flow back into the room through the air outlet after exchanging heat with the heat exchanger. The outdoor fresh air and the indoor air do not interfere with each other.

[0041] Of course, the fresh air module composed of the fresh air duct component 200 and the fan assembly 300 in this embodiment of the present invention can also be applied to other types of air conditioners. For example, the outdoor fresh air of the air conditioner can be mixed with the indoor air after heat exchange before flowing into the room, or the outdoor fresh air can flow through the heat exchanger and exchange heat with the heat exchanger before flowing into the room.

[0042] Specifically, the fan assembly 300 may include an axial fan 310, which is located in the fresh air duct 210 and adjacent to the duct inlet 211. Outdoor fresh air can be drawn in and discharged along the axial direction of the axial fan 310. Driven by the axial fan 310, the flow rate of outdoor fresh air can be increased, thereby increasing the intake volume of outdoor fresh air.

[0043] In addition, the fan assembly 300 may also include a centrifugal fan 320, which is located in the fresh air duct 210 and on the side of the axial fan 310 away from the duct inlet 211. That is, the centrifugal fan 320 and the axial fan 310 can be connected in series along the axial direction. Under the joint drive of the centrifugal fan 320 and the axial fan 310, the intake volume of outdoor fresh air can be further increased. This not only increases the overall air volume of the air conditioner to improve the heating or cooling effect on the room, but also improves the purification effect on the indoor air.

[0044] In this application, instead of using a single centrifugal fan, an axial fan 310 and a centrifugal fan 320 are connected in series. When both fans rotate at 1400 rpm, the air delivery volume of a single centrifugal fan is 39.2 m³ / s. 3 / h, while the air delivery volume of the fan assembly 300 in this application is 43.5m³ / h. 3 / h.

[0045] The fresh air duct component 200 is equipped with a flow guide grille 400, which is located between the centrifugal fan 320 and the axial fan 310. The flow guide grille 400 directs the outdoor fresh air from the axial fan 310 to the centrifugal fan 320 and adjusts the flow direction of the outdoor fresh air to increase the static pressure of the fresh air.

[0046] It is understandable that the outdoor fresh air blown out by the axial fan 310 will be driven by the blades of the axial fan 310 to rotate relative to the axial axis of the axial fan 310. That is, the outdoor fresh air flowing out from the axial fan 310 will rotate relative to the axial axis of the centrifugal fan 320. At this time, it is not conducive to the air intake of the centrifugal fan 320. This application sets a guide grille 400 between the centrifugal fan 320 and the axial fan 310. The guide grille 400 can be used to guide the outdoor fresh air blown out by the axial fan 310 to change the airflow direction of the axial fan 310. The outdoor fresh air can be intake along the axial axis of the centrifugal fan 320. This can recover the rotational dynamic pressure of the airflow and increase the static pressure to improve the air guiding effect of the centrifugal fan 320. The intake efficiency of the centrifugal fan 320 can be higher, which can further increase the air volume of the fan assembly 300. Under the joint drive of the axial fan 310 and the centrifugal fan 320, the air volume of the air conditioner can be greatly increased, resulting in a better user experience.

[0047] Thus, the air guide grille 400 of the air conditioner according to the present utility model embodiment can guide the air outlet of the axial fan 310 so that the airflow passing through the air guide grille 400 can be guided from the rotation direction to the axial direction of the centrifugal fan 320, so as to recover the rotational dynamic pressure of the airflow, increase the static pressure, which is beneficial to improve the air intake efficiency of the centrifugal fan 320, thereby increasing the air volume of the fan assembly 300 and improving the air guiding effect.

[0048] In some specific embodiments of this utility model, such as Figure 6 and Figure 7 As shown, the flow guide grille 400 is provided with a plurality of first flow guide ribs 410 arranged at intervals along the circumference. The first flow guide ribs 410 extend radially along the flow guide grille 400, and the first flow guide ribs 410 may include an arc-shaped air guide section 411, which is close to the centrifugal fan 320 along the axial direction of the flow guide grille 400. The arc-shaped air guide section 411 extends arc-shaped along the circumference of the flow guide grille 400.

[0049] Understandably, the outdoor fresh air blown out by the axial fan 310 will be driven by the blades of the axial fan 310 to rotate relative to the axis of the axial fan 310. By setting the arc-shaped air guide section 411, the airflow from the axial fan 310 can be guided more naturally. The outdoor fresh air blown out by the axial fan 310 can flow more smoothly to the air guide grille 400, and the outdoor fresh air can flow more smoothly along the arc-shaped air guide section 411, effectively avoiding the airflow from colliding with the air guide grille 400. This can reduce the vibration generated by the airflow, thereby helping to reduce the noise generated when the air conditioner is running, and can also improve the air guiding effect of the fan assembly 300.

[0050] Furthermore, such as Figure 7As shown, the first guide rib 410 may include a planar air guide section 412, which is connected to the end of the arc-shaped air guide section 411 near the centrifugal fan 320, and the planar air guide section 412 is parallel to the axial direction of the guide grille 400.

[0051] Therefore, the outdoor fresh air can flow along the arc-shaped air guide section 411 to the plane air guide section 412, and under the guidance of the plane air guide section 412, the outdoor fresh air can flow along the axis of the centrifugal fan 320 to the centrifugal fan 320. This can prevent the outdoor fresh air flowing into the centrifugal fan 320 from rotating, thereby improving the air intake efficiency of the centrifugal fan 320 and making the air guiding effect of the centrifugal fan 320 better.

[0052] In addition, multiple first guide ribs 410 are arranged at intervals along the circumference of the guide grille 400. This allows the multiple first guide ribs 410 to better guide the outdoor fresh air blown out by the axial fan 310, so that the outdoor fresh air blown out by the axial fan 310 can be guided by the guide grille 400 to flow along the axial direction of the centrifugal fan 320, further improving the air intake efficiency of the centrifugal fan 320. This can improve the air guiding effect of the fan assembly 300, so that the air conditioner can better introduce outdoor fresh air to purify indoor air.

[0053] Furthermore, such as Figure 6 and Figure 7 As shown, the flow guide grille 400 is provided with a plurality of second flow guide ribs 420 arranged at intervals along the circumference. The second flow guide ribs 420 are located on the radial inner side of the first flow guide ribs 410. The second flow guide ribs 420 extend radially along the flow guide grille 400 and are parallel to the axial direction of the flow guide grille 400.

[0054] The second guide rib 420 and the first guide rib 410 can be connected and transitioned by a connecting ring 430, and multiple second guide ribs 420 and multiple first guide ribs 410 can be staggered in the circumferential direction.

[0055] It is understandable that the air velocity and air volume at the outlet near the center of the axial fan 310 will be relatively small. By setting a second guide rib 420 on the radial inner side of the first guide rib 410, and the second guide rib 420 being parallel to the axial direction of the guide grille 400, the second guide rib 420 can be used to guide the outdoor fresh air, allowing the outdoor fresh air to flow into the centrifugal fan 320 along the axial direction. It can also simplify the processing technology of the second guide rib 420, making it easier to process and improving processing efficiency.

[0056] In some specific embodiments of this utility model, such as Figure 2As shown, along the axial direction of the axial fan 310, the distance between the guide grille 400 and the axial fan 310 is L1, and L1 satisfies: 5mm≤L1≤15mm.

[0057] In other words, the distance L1 between the airflow guide grille 400 and the axial fan 310 cannot be too small. If the distance L1 between the airflow guide grille 400 and the axial fan 310 is too small, the airflow guide grille 400 will block the airflow from the axial fan 310. This will not only reduce the airflow volume and flow rate of the outdoor fresh air, but may also generate noise. Therefore, L1 cannot be less than 5mm.

[0058] Preferably, 7mm≤L1, so that the air guide grille 400 and the axial fan 310 can maintain a large axial distance, and the air guide grille 400 will not block the air outlet of the axial fan 310. This allows the outdoor fresh air to flow smoothly into the air guide grille 400 to improve the air guiding effect, and also reduces the noise generated by the flow of outdoor fresh air.

[0059] More preferably, 9mm≤L1, so that the air guide grille 400 and the axial fan 310 can maintain a larger axial distance, the air outlet effect of the axial fan 310 can be better, the outdoor fresh air can flow into the air guide grille 400 more smoothly, and the noise generated by the flow of outdoor fresh air can be further reduced.

[0060] In some specific embodiments, the distance between the airflow grille 400 and the axial fan 310 along the axial direction of the axial fan 310 is L1, and L1 satisfies: L1≤15mm.

[0061] In other words, the distance L1 between the airflow guide grille 400 and the axial fan 310 cannot be too large. If the distance L1 is too large, the airflow guide grille 400 cannot guide the airflow from the axial fan 310 in a timely manner, and some of the kinetic energy of the outdoor fresh air will be dissipated, reducing the airflow guiding efficiency of the airflow guide grille 400. This, in turn, will lead to a decrease in the air intake efficiency of the centrifugal fan 320 and a reduction in the airflow guiding effect. Moreover, if the distance L1 between the airflow guide grille 400 and the axial fan 310 is too large, the overall size of the fresh air duct component 200 will also increase, making installation inconvenient. Therefore, L1 cannot exceed 15mm.

[0062] Preferably, L1≤13mm, so that the air guide grille 400 and the axial fan 310 can maintain a small axial gap. The air guide grille 400 can guide the air outlet of the axial fan 310 in a timely manner, resulting in a better air guiding effect. This can improve the air guiding efficiency of the centrifugal fan 320 and reduce the overall size of the fresh air duct component 200, making it easier to install and fix the fresh air duct component 200.

[0063] More preferably, L1≤11mm, which allows for a smaller axial spacing between the air guide grille 400 and the axial fan 310. The air guide grille 400 can more effectively guide the airflow from the axial fan 310, resulting in better airflow. This further improves the airflow efficiency of the centrifugal fan 320 and reduces the overall size of the fresh air duct component 200, making it easier to install and fix the fresh air duct component 200.

[0064] Specifically, 5mm ≤ L1 ≤ 15mm, for example, L1 can be 5mm, 7mm, 9mm, 11mm, 13mm, or 15mm. This setting can prevent the distance L1 between the air guide grille 400 and the axial fan 310 from being too small, so that the outdoor fresh air can flow smoothly into the air guide grille 400, and can also reduce the noise generated by the flow of outdoor fresh air. On the other hand, it can also prevent the distance L1 between the air guide grille 400 and the axial fan 310 from being too large, so that the outdoor fresh air blown out by the axial fan 310 can flow smoothly into the air guide grille 400. Under the guidance of the air guide grille 400, the air guiding efficiency of the centrifugal fan 320 can be improved, thereby improving the energy efficiency of the air conditioner. It can also reduce the overall size of the fresh air duct component 200, making it easier to install and fix the fresh air duct component 200.

[0065] In some specific embodiments of this utility model, such as Figure 2 and Figure 4 As shown, the outer diameter of the flow guide grille 400 is D1, the blade diameter of the axial fan 310 is D2, and D1 and D2 satisfy: D2≤D1.

[0066] In other words, the outer diameter D1 of the airflow guide grille 400 cannot be too small. If the outer diameter D1 of the airflow guide grille 400 is too small, the blade diameter D2 of the axial fan 310 will be larger than the outer diameter D1 of the airflow guide grille 400. Consequently, not all the outdoor fresh air blown out by the axial fan 310 will flow to the airflow guide grille 400, resulting in lower airflow efficiency. Therefore, the outer diameter D1 of the airflow guide grille 400 cannot be less than D2.

[0067] Preferably, 1.02×D2≤D1, which ensures that the outer diameter D1 of the air guide grille 400 is greater than the blade diameter D2 of the axial fan 310, so that more outdoor fresh air blown out by the axial fan 310 can flow to the air guide grille 400 and then to the centrifugal fan 320, thereby improving the air guide efficiency of the air guide grille 400.

[0068] In some specific embodiments of this utility model, such as Figure 2 and Figure 4 As shown, the outer diameter of the flow guide grille 400 is D1, the blade diameter of the axial fan 310 is D2, and D1 and D2 satisfy: D1≤1.1×D2.

[0069] In other words, the outer diameter D1 of the airflow guide grille 400 cannot be too large. If the outer diameter D1 of the airflow guide grille 400 is too large, the blade diameter D2 of the axial fan 310 will be much smaller than the outer diameter D1 of the airflow guide grille 400. This will reduce the amount of outdoor fresh air introduced by the axial fan 310, consequently leading to a decrease in the overall airflow of outdoor fresh air introduced by the fan assembly 300. Therefore, the outer diameter D1 of the airflow guide grille 400 cannot exceed 1.1 × D2.

[0070] Preferably, D1 ≤ 1.08 × D2, so that the difference between the blade diameter D2 of the axial fan 310 and the outer diameter D1 of the guide grille 400 is not too large, the outdoor fresh air introduced by the axial fan 310 is not easily dispersed, and thus the air volume of the outdoor fresh air introduced by the axial fan 310 can be larger, and the overall air volume of the outdoor fresh air introduced by the fan assembly 300 is higher.

[0071] Specifically, D1 and D2 satisfy the condition: D2 ≤ D1 ≤ 1.1 × D2. For example, D1 can be D2, 1.01 × D2, 1.02 × D2, 1.03 × D2, 1.04 × D2, 1.05 × D2, 1.06 × D2, 1.07 × D2, 1.08 × D2, 1.09 × D2, or 1.1 × D2. This avoids the outer diameter D1 of the air guide grille 400 being too small, ensuring that all the outdoor fresh air blown out by the axial fan 310 flows to the air guide grille 400, thus ensuring the air guide efficiency of the air guide grille 400. It also avoids the outer diameter D1 of the air guide grille 400 being too large, ensuring that the air volume of the outdoor fresh air introduced by the axial fan 310 is sufficient, thus ensuring that the overall air volume of the outdoor fresh air introduced by the fan assembly 300 is large.

[0072] In some specific embodiments of this utility model, such as Figure 2 and Figure 4 As shown, the fresh air duct component 200 is also provided with a guide ring 500. The guide ring 500 is fixed in the fresh air duct 210 and is located on the side of the guide grille 400 facing the axial fan 310. A portion of the axial fan 310 is located in the guide ring 500.

[0073] The guide ring 500 can be configured with an open structure on the side facing the axial flow fan 310 along the axial direction, while the side of the guide ring 500 facing away from the axial flow fan 310 along the axial direction can be fixed to the guide grille 400. This arrangement allows the guide ring 500 to be fixed by the guide grille 400, and the guide ring 500 can collect airflow and guide the airflow generated by the axial flow fan 310, thereby guiding outdoor fresh air to the centrifugal fan 320, further improving the air intake efficiency of the centrifugal fan 320, and making the air guiding effect of the fan assembly 300 better.

[0074] Furthermore, such as Figure 2 and Figure 4 As shown, the blade diameter of the axial fan 310 is D2, the inner diameter of the guide ring 500 is D3, and D2 and D3 satisfy: 1.05×D2≤D3≤1.1×D2.

[0075] In other words, the inner diameter D3 of the guide ring 500 cannot be too large. If the inner diameter D3 of the guide ring 500 is too large, the radial distance between the guide ring 500 and the blades of the axial fan 310 will be too large. The guide ring 500 will not be able to effectively guide the outdoor fresh air blown out by the axial fan 310, which will easily cause the outdoor fresh air to diffuse and leak, reducing the airflow of outdoor fresh air to the centrifugal fan 320, thereby reducing the air intake efficiency and air guiding efficiency of the centrifugal fan 320. Therefore, the inner diameter D3 of the guide ring 500 cannot be greater than 1.1 × D2.

[0076] Preferably, D3 ≤ 1.09 × D2, which allows for a smaller inner diameter D3 of the guide ring 500, maintaining a smaller radial distance between the guide ring 500 and the blades of the axial fan 310, thus preventing airflow leakage between the axial fan 310 and the guide ring 500. Consequently, guided by the guide ring 500, the outdoor fresh air blown by the axial fan 310 flows along the guide ring 500 to the guide grille 400. Then, guided by the guide grille 400, the direction of the outdoor fresh air flow is changed, causing it to flow axially into the centrifugal fan 320. This increases the airflow volume of the outdoor fresh air flowing towards the centrifugal fan 320, thereby improving the intake efficiency of the centrifugal fan 320 and ultimately enhancing its airflow guiding efficiency.

[0077] More preferably, D3 ≤ 1.08 × D2, which makes the inner diameter D3 of the guide ring 500 smaller, so that the guide ring 500 and the blades of the axial fan 310 maintain a smaller radial distance, further preventing the airflow generated by the axial fan 310 from leaking between the axial fan 310 and the guide ring 500, and further increasing the airflow of outdoor fresh air to the centrifugal fan 320, thereby better improving the air intake efficiency of the centrifugal fan 320, and significantly improving the air guiding efficiency of the centrifugal fan 320.

[0078] In some specific embodiments, the blade diameter of the axial fan 310 is D2, and the inner diameter of the guide ring 500 is D3, where D2 and D3 satisfy: 1.05×D2≤D3.

[0079] In other words, the inner diameter D3 of the guide ring 500 cannot be too small. If the inner diameter D3 of the guide ring 500 is too small, the radial clearance between the guide ring 500 and the blades of the axial fan 310 will be too small, which will easily cause a whistling sound and a large airflow noise. Therefore, the inner diameter D3 of the guide ring 500 cannot be less than 1.05 × D2.

[0080] Preferably, 1.06×D2≤D3, so that the inner diameter D3 of the guide ring 500 can be larger, so that the guide ring 500 and the blades of the axial fan 310 maintain a larger radial distance, and the airflow can be smoother, thus making it less likely to generate noise.

[0081] More preferably, 1.07×D2≤D3, so that the inner diameter D3 of the guide ring 500 can be larger, so that the radial gap between the guide ring 500 and the blades of the axial fan 310 is larger, and the airflow generated by the axial fan 310 can be smoother and noise generation can be avoided more effectively.

[0082] Specifically, 1.05×D2≤D3≤1.1×D2. For example, D3 can be 1.05×D2, 1.06×D2, 1.07×D2, 1.08×D2, 1.09×D2, or 1.1×D2. This can prevent the inner diameter D3 of the guide ring 500 from being too large, so that the radial gap between the guide ring 500 and the blades of the axial fan 310 can be smaller, thus avoiding excessive air leakage. At the same time, it can also prevent the inner diameter D3 of the guide ring 500 from being too small, so that the radial gap between the guide ring 500 and the blades of the axial fan 310 can be larger, thereby reducing noise.

[0083] In some specific embodiments of this utility model, such as Figure 2 As shown, along the axial direction of the axial fan 310, the dimension of the axial fan 310 is T, and the axial dimension of the axial fan 310 outside the guide ring 500 is t, and t and T satisfy: T / 5≤t≤T / 2.

[0084] In other words, the axial dimension t of the axial fan 310 outside the guide ring 500 cannot be too small. If the axial dimension t of the axial fan 310 outside the guide ring 500 is too small, that is, the exposed dimension of the axial fan 310 outside the guide ring 500 is small, the guide ring 500 may affect the collection of outdoor fresh air to the axial fan 310, thereby reducing the airflow of the axial fan 310. Therefore, the axial dimension t of the axial fan 310 outside the guide ring 500 cannot be less than T / 5.

[0085] Preferably, T / 4≤t, which allows the axial dimension t of the axial fan 310 outside the guide ring 500 to be larger, that is, the dimension of the axial fan 310 exposed outside the guide ring 500 can be larger, so that the axial fan 310 can better guide the air, thereby increasing the air volume of the axial fan 310 and the air volume of the fan assembly 300 can be greater.

[0086] In some specific embodiments, the dimension of the axial fan 310 along the axial direction is T, and the axial dimension of the axial fan 310 outside the guide ring 500 is t, and t and T satisfy: t≤T / 2.

[0087] In other words, the axial dimension t of the axial fan 310 outside the guide ring 500 cannot be too large. If the axial dimension t of the axial fan 310 outside the guide ring 500 is too large, that is, if the exposed size of the axial fan 310 outside the guide ring 500 is too large, the guide ring 500 cannot effectively guide the outdoor fresh air, and the outdoor fresh air blown out by the axial fan 310 will leak outward, resulting in a reduction in the amount of outdoor fresh air flowing to the centrifugal fan 320, and a lower air intake efficiency for the centrifugal fan 320. Therefore, the axial dimension t of the axial fan 310 outside the guide ring 500 cannot exceed T / 2.

[0088] Preferably, t≤T / 3, which allows the axial dimension t of the axial fan 310 outside the guide ring 500 to be smaller, that is, the dimension of the axial fan 310 exposed outside the guide ring 500 can be smaller. The guide ring 500 can more effectively guide the outdoor fresh air blown out by the axial fan 310, so that the outdoor fresh air flowing to the centrifugal fan 320 is sufficient, thereby increasing the air intake of the centrifugal fan 320 and thus improving the air guiding efficiency of the centrifugal fan 320. The air guiding volume of the fan assembly 300 can be greater.

[0089] Specifically, T / 5 ≤ t ≤ T / 2, for example, t can be T / 5, T / 4, T / 3 or T / 2. This avoids the axial dimension t of the axial fan 310 outside the guide ring 500 being too small or too large, so as to ensure that the air volume of the axial fan 310 can be large, thereby increasing the air volume of the centrifugal fan 320 and the air volume of the fan assembly 300 can be large.

[0090] In some specific embodiments of this utility model, such as Figure 2 and Figure 3 As shown, the air conditioner may also include a filter 600.

[0091] The filter 600 is located inside the fresh air duct component 200 and on the side of the axial fan 310 facing away from the centrifugal fan 320, along the axial direction of the axial fan 310. The distance between the filter 600 and the axial fan 310 is L2, which satisfies: 5mm≤L2≤20mm.

[0092] For example, the filter 600 can be a HEPA (High-efficiency particulate) filter or an activated carbon filter, but is not limited to these.

[0093] The filter 600 is located inside the fresh air duct component 200 and on the side of the axial fan 310 facing away from the centrifugal fan 320, that is, the filter 600 is adjacent to the air duct inlet 211. In this way, the filter 600 can filter the outdoor fresh air flowing into the fresh air duct 210 to remove large particles such as dust, hair, pollen, and willow catkins. This can not only ensure the cleanliness of the air supplied by the air conditioner to improve the quality of indoor air, but also reduce the entry of dust and impurities into the casing to cause blockage, corrosion and wear on components such as the motor, thereby extending the service life of the air conditioner and ensuring that the air conditioner can operate normally.

[0094] In some specific embodiments, the distance between the filter 600 and the axial fan 310 is L2, where L2 satisfies: 5mm≤L2.

[0095] In other words, the distance L2 between the filter 600 and the axial fan 310 cannot be too small. If the distance L2 is too small, outdoor fresh air will produce abnormal noise when flowing from the filter 600 to the axial fan 310, resulting in a poor user experience. Therefore, the distance L2 between the filter 600 and the axial fan 310 cannot be less than 5mm.

[0096] Preferably, 8mm≤L2, so that the distance L2 between the filter 600 and the axial fan 310 can be larger, so as to avoid abnormal noise when the outdoor fresh air flows from the filter 600 to the axial fan 310.

[0097] More preferably, 11mm≤L2, which allows for a larger distance L2 between the filter 600 and the axial fan 310, more effectively preventing abnormal noise when outdoor fresh air flows from the filter 600 to the axial fan 310, resulting in a better user experience.

[0098] In some specific embodiments, the distance between the filter screen 600 and the axial fan 310 is L2, and L2 satisfies: L2≤20mm.

[0099] In other words, the distance L2 between the filter 600 and the axial fan 310 cannot be too large. If the distance L2 is too large, it will cause the overall size of the fresh air duct component 200 to increase, making it difficult to install and fix the fresh air duct component 200. Therefore, L1 should not exceed 20mm.

[0100] Preferably, L2 ≤ 17mm, which allows for a smaller gap L2 between the filter screen 600 and the axial fan 310, enabling a more compact assembly between the filter screen 600 and the axial fan 310. This, in turn, allows for a smaller overall size of the fresh air duct component 200, facilitating its installation and fixation.

[0101] In a further preferred embodiment, L2 ≤ 14mm, which can make the gap L2 between the filter screen 600 and the axial fan 310 smaller, the assembly between the filter screen 600 and the axial fan 310 more compact, and thus make the overall size of the fresh air duct component 200 smaller, making it easier to install and fix the fresh air duct component 200.

[0102] Specifically, 5mm ≤ L2 ≤ 20mm. For example, L2 can be 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, or 20mm. This avoids the gap L2 between the filter 600 and the axial fan 310 being too small, which would prevent abnormal noise when outdoor fresh air flows from the filter 600 to the axial fan 310. It also avoids the gap L2 between the filter 600 and the axial fan 310 being too large, so that the assembly between the filter 600 and the axial fan 310 can be more compact. This allows the overall size of the fresh air duct component 200 to be smaller, making it easier to install and fix the fresh air duct component 200.

[0103] In some specific embodiments of this utility model, such as Figure 2 and Figure 3 As shown, the fan assembly 300 may also include a first motor 710, which drives the axial fan 310 and the centrifugal fan 320 to rotate. That is, the axial fan 310 and the centrifugal fan 320 can be connected in series on the same motor shaft 720, and the first motor 710 can drive the axial fan 310 and the centrifugal fan 320 to rotate synchronously, which is a simple structure.

[0104] In some other specific embodiments of this utility model, the fan assembly 300 may also include two second motors (not shown in the figure), which drive the axial fan 310 and the centrifugal fan 320 to rotate respectively.

[0105] In other words, one second motor is used to drive the axial fan 310 to rotate, and another second motor is used to drive the centrifugal fan 320 to rotate. That is, the axial fan 310 and the centrifugal fan 320 are two separate fans. In this way, there is no structural interference between the axial fan 310 and the centrifugal fan 320, and they can operate independently. This allows for individual adjustment of the speed of each fan, which further improves the air guiding effect of the dual fans and optimizes the air delivery noise effect, resulting in a better user experience.

[0106] Other components and operations of the air conditioner according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0107] The air conditioner of this invention performs a refrigeration cycle by using a compressor, condenser, expansion valve, and evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the conditioned and heat-exchanged air.

[0108] The compressor compresses refrigerant gas under high temperature and pressure and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and the heat is released to the surrounding environment through the condensation process.

[0109] The expansion valve expands the high-temperature, high-pressure liquid refrigerant condensed in the condenser into a low-pressure liquid refrigerant. The evaporator evaporates the expanded refrigerant in the expansion valve and returns the low-temperature, low-pressure refrigerant gas to the compressor. The evaporator achieves its cooling effect by utilizing the latent heat of refrigerant evaporation to exchange heat with the material being cooled. Throughout the cycle, the air conditioner regulates the temperature and humidity of the indoor space.

[0110] In the description of this specification, references to terms such as "specific embodiment" and "specific example" refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example that is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0111] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An air conditioner, characterized in that, include: The housing is provided with a fresh air inlet and a fresh air outlet, an air inlet and an air outlet; A heat exchanger is disposed inside the housing. Indoor air enters the housing from the air inlet and flows into the room from the air outlet after exchanging heat with the heat exchanger. The fresh air duct component is disposed inside the housing, and a fresh air duct is constructed inside the fresh air duct component, which is connected to the fresh air inlet and the fresh air outlet respectively. A fan assembly is disposed within the fresh air duct component, and the fan assembly drives outdoor fresh air to enter the fresh air duct component from the fresh air inlet and flow into the room through the fresh air outlet; Its features are, The fan assembly includes: An axial flow fan is provided inside the fresh air duct and adjacent to the duct inlet; A centrifugal fan is disposed within the fresh air duct and located on the side of the axial fan away from the duct inlet; The fresh air duct component includes: A flow guide grille is disposed between the centrifugal fan and the axial fan. The flow guide grille directs the outdoor fresh air from the axial fan to the centrifugal fan and adjusts the flow direction of the outdoor fresh air.

2. The air conditioner of claim 1, wherein The flow guide grille is provided with a plurality of first flow guide ribs arranged at circumferential intervals, the first flow guide ribs extending radially along the flow guide grille, and the first flow guide ribs comprising: An arc-shaped air guide section is located close to the centrifugal fan along the axial direction of the air guide grille, and the arc-shaped air guide section extends in an arc shape along the circumference of the air guide grille. A planar air guide section is connected to the end of the arc-shaped air guide section near the centrifugal fan, and the planar air guide section is parallel to the axial direction of the air guide grille.

3. The air conditioner of claim 2, wherein The flow guide grille is provided with a plurality of second flow guide ribs arranged at intervals along the circumference. The second flow guide ribs are located radially inside the first flow guide ribs and extend radially along the flow guide grille and are parallel to the axial direction of the flow guide grille.

4. The air conditioner of claim 1, wherein Along the axial direction of the axial fan, the distance between the air guide grille and the axial fan is L1, and L1 satisfies: 5mm≤L1≤15mm.

5. The air conditioner according to claim 1, characterized in that, The outer diameter of the flow guide grille is D1, and the blade diameter of the axial fan is D2, and D1 and D2 satisfy: D2≤D1≤1.1×D2.

6. The air conditioner of claim 1, wherein The fresh air duct also includes: A guide ring is fixed inside the fresh air duct and located on the side of the guide grille facing the axial fan, with a portion of the axial fan located inside the guide ring.

7. The air conditioner according to claim 6, characterized in that, The blade diameter of the axial fan is D2, and the inner diameter of the guide ring is D3, and D2 and D3 satisfy: 1.05×D2≤D3≤1.1×D2.

8. The air conditioner of claim 6, wherein Along the axial direction of the axial fan, the dimension of the axial fan is T, and the axial dimension of the axial fan outside the guide ring is t, and t and T satisfy: T / 5≤t≤T / 2.

9. The air conditioner of claim 1, wherein Also includes: A filter screen is disposed inside the fresh air duct component and located on the side of the axial fan facing away from the centrifugal fan, and along the axial direction of the axial fan. The distance between the filter screen and the axial fan is L2, and L2 satisfies: 5mm≤L2≤20mm.

10. The air conditioner of claim 1, wherein The fan assembly further includes a first motor that drives the axial fan and the centrifugal fan to rotate; or... The fan assembly also includes two second motors, which drive the axial fan and the centrifugal fan to rotate in a one-to-one correspondence.

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