Air conditioner indoor unit

Abstract

The utility model provides a kind of indoor unit of air conditioner, including indoor unit shell, with installation cavity, first air passage portion and second air passage portion are set apart along height direction, at least part of one of the first air passage portion and the second air passage portion is used for air intake, and at least part of the other is used for air outlet;First fan component, evaporator component and second fan component are sequentially arranged along the height direction of the indoor unit shell, and at least one of the first fan component and the second fan component includes coaxially arranged centrifugal fan blade and axial fan blade.The technical scheme provided by the utility model can solve the technical problems in the prior art that the fan component of reversible air conditioner only includes single fan blade structure, and the design in the air duct is unreasonable, which can easily cause the air flow entering the upper air inlet to attenuate during the process of flowing to the lower air inlet, affecting the air supply effect.

Description

Technical Field

[0001] This utility model relates to the field of air conditioner technology, and more specifically, to an indoor unit of an air conditioner. Background Technology

[0002] Reversible cabinet air conditioners can switch between upper and lower air vents through a movable volute, allowing air to enter through the lower vent and exit through the upper vent, or vice versa, thus achieving better comfort. Currently, reversible air conditioners only have a single fan blade structure for their fan components, and the duct design is often unreasonable, which can easily cause the airflow entering from the upper vent to decrease in volume as it travels to the lower vent, affecting the air delivery effect. Utility Model Content

[0003] The main purpose of this utility model is to provide an indoor unit and an outdoor unit for an air conditioner to solve the technical problem that the fan component of the reversible air conditioner in the prior art only includes a single fan blade structure and the design of the air duct is unreasonable, which easily causes the airflow entering from the upper air inlet to the lower air inlet to decrease in air volume, thus affecting the air delivery effect.

[0004] To achieve the above objectives, according to one aspect of the present invention, an indoor air conditioning unit is provided, comprising:

[0005] The indoor unit housing has a mounting cavity and a first air vent and a second air vent spaced apart along the height direction, wherein at least a portion of one of the first air vent and the second air vent is used for air intake and at least a portion of the other is used for air exhaust.

[0006] A first fan component, an evaporator component, and a second fan component are sequentially arranged along the height direction of the indoor unit casing. The first fan component has a first air intake state and a first air outlet state, and the second fan component has a second air intake state and a second air outlet state.

[0007] Wherein, when the first fan component is in the first air intake state, the second fan component is in the second air outlet state, so that the air flowing out of the first fan component flows to the second fan component through the evaporator component; when the second fan component is in the second air intake state, the first fan component is in the first air outlet state, so that the air flowing out of the second fan component flows to the first fan component through the evaporator component.

[0008] At least one of the first fan component and the second fan component includes a centrifugal fan blade and an axial fan blade arranged coaxially.

[0009] In some embodiments, the first air vent and the second air vent are symmetrically distributed along the evaporator component; and / or

[0010] The first fan component and the second fan component are symmetrically distributed along the evaporator component.

[0011] In some embodiments, the first fan component includes a first centrifugal fan blade and a first axial fan blade, and the first air passage includes a first connecting port and a first air outlet spaced apart along the height direction. The first connecting port is connected to the air inlet side or air outlet side of the first axial fan blade, and the first air outlet is connected to the air outlet side of the first centrifugal fan blade.

[0012] The second fan component includes a second centrifugal fan blade and a second axial fan blade. The second air passage includes a second air outlet and a second connecting port that are spaced apart along the height direction. The second air outlet is connected to the air outlet side of the second centrifugal fan blade, and the second connecting port is connected to the air inlet side or the air outlet side of the second axial fan blade.

[0013] In some embodiments, the first fan component further includes a first volute, the first volute having a first air inlet and a third air outlet, the third air outlet communicating with the air outlet side of the first air outlet, the first centrifugal fan blade disposed inside the first volute, the first axial fan blade disposed outside the first volute, and / or,

[0014] The second fan component also includes a second volute, which has a second air inlet and a fourth air outlet. The fourth air outlet is connected to the air outlet side of the second air outlet. The second centrifugal fan blade is disposed inside the second volute, and the second axial fan blade is disposed outside the second volute.

[0015] In some embodiments, when the first fan component is in the first air intake state and the second fan component is in the second air outlet state, the first axial fan blade rotates in the reverse direction, and at least one of the second axial fan blade and the second centrifugal fan blade rotates in the forward direction, the forward direction and the reverse direction are opposite, the first communication port is opened, and at least one of the second air outlet and the second communication port is opened.

[0016] When the second fan component is in the second air intake state and the first fan component is in the first air outlet state, at least one of the first axial fan blade and the first centrifugal fan blade is configured to rotate in the forward direction, the second axial fan blade is configured to rotate in the reverse direction, the second connecting port is opened, and at least one of the first connecting port and the first air outlet is opened.

[0017] In some embodiments, the first fan component includes a first dual-shaft drive device, with the first axial flow fan blade and the first centrifugal fan blade disposed at two output ends of the first dual-shaft drive device; the second fan component includes a second dual-shaft drive device, with the second axial flow fan blade and the second centrifugal fan blade disposed at two output ends of the second dual-shaft drive device; or...

[0018] The first fan component includes a first drive device and a second drive device. The first drive device is driven to the first axial fan blade, and the second drive device is driven to the first centrifugal fan blade. The second fan component includes a third drive device and a fourth drive device. The third drive device is driven to the second axial fan blade, and the fourth drive device is driven to the second centrifugal fan blade.

[0019] In some embodiments, the evaporator component is arranged in a V-shape, with the open end of the evaporator component facing the first fan component or the second fan component.

[0020] In some embodiments, the indoor unit of the air conditioner further includes:

[0021] A flow guiding component is disposed within the mounting cavity of the indoor unit housing, and at least one of the first connecting port, the first air outlet, the second air outlet, and the second connecting port is provided with the flow guiding component.

[0022] In some embodiments, the outer periphery of the first volute and the inner wall of the indoor unit housing are spaced apart to form a first gap; and / or,

[0023] The outer periphery of the second volute and the inner wall of the indoor unit housing are spaced apart to form a second gap.

[0024] In some embodiments, the first volute is provided with a first flow guide on the side near the first communication port, and the first flow guide is provided through the upper and lower ends of the first volute; and / or,

[0025] The second volute has a second flow guide on the side near the second communication port, and the second flow guide is provided through the upper and lower ends of the second volute.

[0026] By applying the technical solution of this utility model, at least one of the first and second fan components includes a coaxially arranged centrifugal fan blade and an axial fan blade. The centrifugal fan blade is mainly used for direct blowing, increasing air volume and delivery distance, and avoiding air volume attenuation during the delivery process. The axial fan blade plays a certain role in suction when the centrifugal fan blade is blowing air in the forward direction, which helps to overcome air intake resistance and increase air volume, further avoiding air volume attenuation during the delivery process. By changing the rotation direction of the centrifugal fan blade and the axial fan blade, air intake and exhaust can be achieved, thereby ensuring that at least a portion of one of the first and second air passage sections is used for air intake and at least a portion of the other is used for air exhaust, providing a guarantee for diverse air delivery modes, thus realizing long-distance air exhaust and short-distance air exhaust and switching between them, enhancing the diversity of air delivery. Attached Figure Description

[0027] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0028] Figure 1 A perspective view of an indoor air conditioning unit provided according to an embodiment of the present invention is shown;

[0029] Figure 2 An exploded view of an indoor air conditioning unit according to an embodiment of the present invention is shown;

[0030] Figure 3 An exploded view of a first fan component provided according to an embodiment of the present invention is shown;

[0031] Figure 4 A schematic diagram of the internal structure of an air conditioner indoor unit according to an embodiment of the present invention is shown;

[0032] Figure 5 A schematic diagram of the normal air supply working mode provided according to an embodiment of the present invention is shown;

[0033] Figure 6 A schematic diagram of the long-distance air supply working mode provided according to an embodiment of the present invention is shown;

[0034] Figure 7 A schematic diagram of the short-range air supply working mode provided according to an embodiment of the present invention is shown;

[0035] Figure 8 A schematic diagram of the flow guiding component provided according to an embodiment of the present invention is shown;

[0036] Figure 9A schematic diagram of the structure of the first flow guide provided according to an embodiment of the present invention is shown.

[0037] The above figures include the following reference numerals:

[0038] 1. Indoor unit housing; 11. Mounting cavity; 12. First gap; 13. Second gap;

[0039] 2. First ventilation section; 21. First connecting port; 22. First air outlet;

[0040] 3. Second ventilation section; 31. Second connecting port; 32. Second air outlet;

[0041] 4. First fan component; 41. First centrifugal fan blade; 42. First axial fan blade; 43. First volute; 431. First air inlet; 432. Third air outlet; 44. First dual-shaft drive device; 45. First air guide port;

[0042] 5. Evaporator components;

[0043] 6. Second fan component; 61. Second centrifugal fan blade; 62. Second axial fan blade; 63. Second volute; 631. Second air inlet; 632. Fourth air outlet; 64. Second dual-shaft drive device;

[0044] 7. Airflow guiding components. Detailed Implementation

[0045] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0046] like Figures 1 to 9As shown, Embodiment 1 of this utility model provides an indoor air conditioner unit, including an indoor unit housing 1. The indoor unit housing 1 has a mounting cavity 11, and a first air vent 2 and a second air vent 3 are spaced apart along the height direction. At least a portion of one of the first air vent 2 and the second air vent 3 is used for air intake, and at least a portion of the other is used for air exhaust. A first fan component 4, an evaporator component 5, and a second fan component 6 are sequentially arranged along the height direction of the indoor unit housing 1. The first fan component 4 has a first air intake state and a first air exhaust state, and the second fan component 6 has a second air intake state and a second air exhaust state. The states are as follows: when the first fan component 4 is in the first air intake state, the second fan component 6 is in the second air outlet state, so that the air flowing out of the first fan component 4 flows to the second fan component 6 through the evaporator component 5; when the second fan component 6 is in the second air intake state, the first fan component 4 is in the first air outlet state, so that the air flowing out of the second fan component 6 flows to the first fan component 4 through the evaporator component 5; at least one of the first fan component 4 and the second fan component 6 includes a centrifugal fan blade and an axial fan blade arranged coaxially.

[0047] In this application, a first fan component 4, an evaporator component 5, and a second fan component 6 are sequentially arranged along the height of the indoor unit casing 1. This layout ensures that the heat exchange capacity of the evaporator is fully utilized when air passes through it. When the first fan component 4 is in the air intake state, the second fan component 6 is in the air outlet state. Furthermore, the airflow direction change of the evaporator component 5 achieves vertical airflow circulation, enhancing heat exchange efficiency. At least one of the first fan component 4 and the second fan component 6 includes a coaxially arranged centrifugal fan blade and an axial fan blade. The centrifugal fan blade is mainly used for direct airflow, increasing air volume and air delivery distance; while the axial fan blade, when the centrifugal fan blade is working in the forward direction, plays a certain role in suction, helping to overcome air intake resistance and increase air volume. By controlling the rotation direction of the centrifugal fan blade and the axial fan blade, air intake and exhaust can be achieved, thus ensuring that at least a portion of one of the first air outlet section 2 and the second air outlet section 3 is used for air intake and at least a portion of the other for air outlet, providing a guarantee for diverse air delivery modes.

[0048] In some embodiments, such as Figure 1 As shown, the dimensions of the first connecting port 21 and the second connecting port 31 are larger than the dimensions of the first air outlet 22 and the second air outlet 32. Setting the dimensions of the first connecting port 21 and the second connecting port 31 to be larger can better meet the air intake requirements. Setting the dimensions of the first air outlet 22 and the second air outlet 32 ​​to be smaller is equivalent to compressing the air outlet, making the air delivery distance farther.

[0049] like Figures 2 to 4As shown, the first air vent 2 and the second air vent 3 are symmetrically distributed along the evaporator component 5. As the core of heat exchange, the symmetrically distributed first air vent 2 and second air vent 3 on both sides of the evaporator component 5 ensure that airflow passes evenly through the evaporator, thereby improving heat exchange efficiency. This design avoids the problems of localized overcooling or overheating and insufficient heat exchange caused by uneven airflow distribution in traditional air conditioners. The first fan component 4 and the second fan component 6 are symmetrically distributed along the evaporator component 5, making the airflow path more direct and efficient, reducing wind resistance and energy loss, while ensuring a balanced distribution of airflow. By optimizing the fan layout and duct structure, the airflow passes completely and evenly through the evaporator component 5, improving heat exchange efficiency.

[0050] Specifically, the first fan component 4 includes a first centrifugal fan blade 41 and a first axial fan blade 42. The first air passage 2 includes a first connecting port 21 and a first air outlet 22 spaced apart along the height direction. The first connecting port 21 is connected to the air inlet side or air outlet side of the first axial fan blade 42, and the first air outlet 22 is connected to the air outlet side of the first centrifugal fan blade 41. The second fan component 6 includes a second centrifugal fan blade 61 and a second axial fan blade 62. The second air passage 3 includes a second air outlet 32 ​​and a second connecting port 31 spaced apart along the height direction. The second air outlet 32 ​​is connected to the air outlet side of the second centrifugal fan blade 61, and the second connecting port 31 is connected to the air inlet side or air outlet side of the second axial fan blade 62. The first centrifugal fan blade 41 and the second centrifugal fan blade 61 are directly connected to the first air outlet 22 and the second air outlet 32, respectively, ensuring efficient airflow output. The first axial fan blade 42 and the second axial fan blade 62 are connected to the external environment through the first connecting port 21 and the second connecting port 31. This design allows the axial fan blades to function as both air inlet and outlet components, dynamically switching according to different air supply modes. The centrifugal fan blades generate high static pressure, effectively propelling air and achieving long-distance air supply, maintaining temperature consistency even in large spaces. Axial fan blades, with their large air volume and low static pressure, are suitable for short-distance air supply or increasing indoor air circulation. The combination of centrifugal and axial fan blades allows adjustment of their respective operating states (rotation direction, speed, etc.) according to the air supply mode requirements, ensuring effective air supply while achieving quiet operation. Especially when a quiet mode is needed, only the axial fan blades can be turned on, utilizing their lower noise level to provide a more comfortable operating environment.

[0051] It should be noted that the air inlet side or air outlet side of the first axial flow fan blade 42 refers to the space above the first axial flow fan blade 42 in the mounting cavity 11, and the air outlet side of the first centrifugal fan blade 41 refers to the space between the third air outlet 432 (mentioned later as being located on the first volute 43) and the first air outlet 22 of the first centrifugal fan blade 41 in the mounting cavity 11.

[0052] like Figure 3 and Figure 5 As shown, the first fan component 4 further includes a first volute 43, which has a first air inlet 431 and a third air outlet 432. The third air outlet 432 is connected to the air outlet side of the first air outlet 22. The first centrifugal fan blade 41 is disposed inside the first volute 43, and the first axial fan blade 42 is disposed outside the first volute 43. The second fan component 6 further includes a second volute 63, which has a second air inlet 631 and a fourth air outlet 632. The fourth air outlet 632 is connected to the air outlet side of the second air outlet 32. The second centrifugal fan blade 61 is disposed inside the second volute 63, and the second axial fan blade 62 is disposed outside the second volute 63. The design of the volute can effectively control the airflow direction, ensuring that the airflow can contact the evaporator component 5 evenly when passing through the centrifugal fan blade, thereby enhancing the heat exchange process. The coordinated operation of the centrifugal fan and the axial fan not only ensures that sufficient airflow enters the evaporator component 5 for heat exchange, but also, through the action of the axial fan, ensures that the airflow is evenly distributed when leaving the evaporator, further optimizing the heat exchange efficiency.

[0053] like Figures 5 to 7 As shown, when the first fan component 4 is in the first air intake state and the second fan component 6 is in the second air outlet state, the first axial flow fan blade 42 rotates in the reverse direction, and at least one of the second axial flow fan blade 62 and the second centrifugal fan blade 61 rotates in the forward direction, the forward and reverse directions being opposite. The first connecting port 21 is open, and at least one of the second air outlet 32 ​​and the second connecting port 31 is open. When the second fan component 6 is in the second air intake state and the first fan component 4 is in the first air outlet state, at least one of the first axial flow fan blade 42 and the first centrifugal fan blade 41 is configured to rotate in the forward direction, the second axial flow fan blade 62 is configured to rotate in the reverse direction, the second connecting port 31 is open, and at least one of the first connecting port 21 and the first air outlet 22 is open. By controlling the rotation direction of the two fan blades, air can be drawn in and blown out, thereby enabling at least a portion of one of the first air-flow section 2 and the second air-flow section 3 to be used for air intake and at least a portion of the other to be used for air exhaust, thus providing a variety of air supply modes, such as normal air intake mode, long-distance air intake mode and short-distance air intake mode.

[0054] like Figure 3 and Figure 5 As shown, the first fan component 4 includes a first dual-shaft drive device 44, and the first axial flow fan blade 42 and the first centrifugal fan blade 41 are disposed at the two output ends of the first dual-shaft drive device 44. The second fan component 6 includes a second dual-shaft drive device 64, and the second axial flow fan blade 62 and the second centrifugal fan blade 61 are disposed at the two output ends of the second dual-shaft drive device 64. The first dual-shaft drive device 44 drives the first axial flow fan blade 42 and the first centrifugal fan blade 41, and the second dual-shaft drive device 64 drives the second axial flow fan blade 62 and the second centrifugal fan blade 61, thereby realizing the synchronous operation of the first fan component 4 and the second fan component 6.

[0055] Specifically, the first dual-axis drive device 44 and the second dual-axis drive device 64 can be selected as dual-axis drive motors.

[0056] In another embodiment, the first fan component 4 includes a first drive device and a second drive device. The first drive device is drivenly connected to the first axial fan blade 42, and the second drive device is drivenly connected to the first centrifugal fan blade 41. The second fan component 6 includes a third drive device and a fourth drive device. The third drive device is drivenly connected to the second axial fan blade 62, and the fourth drive device is drivenly connected to the second centrifugal fan blade 61. For the first fan component 4, the first and second drive devices allow the rotation of the first axial fan blade 42 and the first centrifugal fan blade 41 to be relatively independent. For the second fan component 6, the third and fourth drive devices allow the rotation of the second axial fan blade 62 and the second centrifugal fan blade 61 to be relatively independent. The fan speed can be adjusted according to the air supply mode and actual needs. For example, in high wind speed mode, the centrifugal fan blade can operate at a higher speed to provide sufficient air pressure, while in low wind speed mode or silent mode, the axial fan blade can operate at a lower speed to save energy and reduce operating noise.

[0057] Specifically, the first drive device, the second drive device, the third drive device, and the fourth drive device can be selected as drive motors.

[0058] like Figure 4 As shown, the evaporator component 5 is V-shaped, with its open end facing either the first fan component 4 or the second fan component 6. The V-shaped evaporator design increases the surface area in contact with the airflow, allowing the airflow to contact the evaporator surface more evenly as it passes through, thus improving heat exchange efficiency. It also helps to divide the airflow into two paths, each of which can fully contact the evaporator component 5, thereby improving the uniformity of the airflow from the air conditioner.

[0059] like Figure 8As shown, the indoor unit of the air conditioner also includes a flow guide component 7 disposed within the mounting cavity 11 of the indoor unit housing 1. At least one of the first connecting port 21, the first air outlet 22, the second air outlet 32, and the second connecting port 31 is equipped with the flow guide component 7. By optimizing the airflow direction and adjusting the airflow effect and direction, the flow guide component 7 can reduce turbulence and eddies in the indoor airflow, thereby reducing noise during the air supply process, especially in silent operation mode. For example, the flow guide component 7 can be configured as a flow channel or as a moving mechanism such as a grille guide plate.

[0060] like Figure 4 As shown, the outer periphery of the first volute 43 and the inner wall of the indoor unit housing 1 are spaced apart to form a first gap 12; the outer periphery of the second volute 63 and the inner wall of the indoor unit housing 1 are spaced apart to form a second gap 13. The presence of the first gap 12 and the second gap 13 provides a channel for airflow. When the fan component is running, air can not only be delivered through the volute, but also flow through the first gap 12 and the second gap 13, forming a surrounding airflow, which helps to improve the guidance and distribution of airflow.

[0061] like Figure 9 As shown, the first volute 43 has a first flow guide 45 on the side near the first connecting port 21, and the first flow guide 45 extends through both the upper and lower ends of the first volute 43; the second volute 63 has a second flow guide on the side near the second connecting port 31, and the second flow guide extends through both the upper and lower ends of the second volute 63. The design of the flow guide helps to reduce wind resistance, thereby reducing the energy consumption of the fan components.

[0062] The technical solution of this application can realize multiple working modes, such as:

[0063] Normal air supply mode: including the mode of air intake through the first connecting port 21 and air outlet through the second air outlet 32 ​​and the mode of air intake through the second connecting port 31 and air outlet through the first air outlet 22 and the mode of air outlet through the first connecting port 21. Taking the mode of air intake at the first connecting port 21 and air outlet at the second connecting port 32 and air outlet at the second connecting port 31 as an example, the first connecting port 21, the second connecting port 31 and the second air outlet 32 ​​are open, the first air outlet 22 is closed, the first axial flow fan 42 is open and rotates in the reverse direction, which has a certain suction effect. The first centrifugal fan 41 can be opened or closed. If the first centrifugal fan 41 is open, it rotates in the reverse direction and does almost no work on the wind. The second axial flow fan 62 and the second centrifugal fan 61 are open and rotate in the forward direction. The second centrifugal fan 61 does work in the forward direction and has a certain suction force on the wind. The second axial flow fan 62 also has a certain suction force. After the wind passes through the first fan component 4, the evaporator component 5 and the second fan component 6 in sequence, it flows out from the second air outlet 32 ​​and the second connecting port 31. In this mode, the first axial flow fan 42, the second axial flow fan 62 and the second centrifugal fan 61 all generate a certain suction force and pressure on the wind, which has a good guiding effect on the air intake and exhaust of this long channel.

[0064] Taking the mode of air intake at the second connecting port 31 and air outlet at the first connecting port 22 as an example, the first connecting port 21, the second connecting port 31 and the first air outlet 22 are open, the second air outlet 32 ​​is closed, the second axial flow fan blade 62 is open and rotates in the reverse direction, which has a certain suction effect. The second centrifugal fan blade 61 can be opened or closed. If the second centrifugal fan blade 61 is open, it rotates in the reverse direction and does almost no work on the wind. The first axial flow fan blade 42 and the first centrifugal fan blade 41 are open and rotate in the forward direction. The first centrifugal fan blade 41 does work in the forward direction and has a certain suction force on the wind. The first axial flow fan blade 42 and the second axial flow fan blade 62 also have a certain suction force. After the wind passes through the second fan component 6, the evaporator component 5 and the first fan component 4 in sequence, it flows out from the first air outlet 22 and the first connecting port 21.

[0065] Long-distance air supply mode: This includes two modes: one where air is introduced through the first connecting port 21 and air is discharged through the second air outlet 32; and the other where air is introduced through the second connecting port 31 and air is discharged through the first air outlet 22. Taking the mode where air is introduced through the first connecting port 21 and air is discharged through the second air outlet 32 ​​as an example, the first connecting port 21 and the second air outlet 32 ​​are open, and the second connecting port 31 and the first air outlet 22 are closed. The first axial flow fan blade 42 is open and rotates in the reverse direction, providing a certain suction effect. The first centrifugal fan blade 41 can be selectively opened or closed. If the first centrifugal fan blade 41 is open, it rotates in the reverse direction. The second centrifugal fan blade 61 is open and rotates in the forward direction. The air passes through the first fan component 4, the evaporator component 5, and the second fan component 6 in sequence, and then flows out from the second air outlet 32. Because the second centrifugal fan blade 61 performs work in the forward direction, the static pressure of the centrifugal fan is relatively large, and the air output is relatively concentrated, thereby achieving long-distance air supply.

[0066] Near-distance air supply mode: This includes the working modes of air intake at the first connecting port 21 and air outlet at the second connecting port 31, and the working mode of air intake at the second connecting port 31 and air outlet at the first connecting port 21. Taking the working mode of air intake at the first connecting port 21 and air outlet at the second connecting port 31 as an example, the first connecting port 21 and the second connecting port 31 are open, the first air outlet 22 and the second air outlet 32 ​​are closed, the first axial fan blade 42 is open and rotates in reverse, and the first centrifugal fan blade 41 can be selectively opened or closed. If the first centrifugal fan blade 41 is open, it rotates in reverse. The second axial fan blade 62 is open and rotates in the forward direction. The air passes through the first fan component 4, the evaporator component 5 and the second fan component 6 in sequence, and then flows out from the second connecting port 31. Because the second axial fan blade 62 does work in the forward direction, it can provide a gentler air volume. Due to the characteristics of axial fan blades, the air delivery is relatively diffused, and the air delivery distance is limited, but the air outlet is relatively gentle, thus achieving near-distance air supply.

[0067] Quiet air supply mode: Unlike the normal air supply mode, long-distance air supply mode and short-distance air supply mode, in this mode, the speeds of the first fan component 4 and the second fan component 6 are different. For example, the speed of the first fan component 4 is greater than the speed of the second fan component 6.

[0068] In other embodiments, switching between long-distance and short-distance air supply modes can simulate effects such as ocean breezes, improving overall comfort and room cooling.

[0069] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0070] The first fan component 4 and the second fan component 6 each include a coaxially arranged centrifugal fan blade and an axial fan blade. The centrifugal fan blade is mainly used for direct air blowing, increasing air volume and delivery distance, and avoiding air volume attenuation during the air delivery process. The axial fan blade plays a certain role in suction when the centrifugal fan blade is blowing air in the forward direction, which helps to overcome air intake resistance and increase air volume, further avoiding air volume attenuation during the air delivery process. By changing the rotation direction of the centrifugal fan blade and the axial fan blade, air can be drawn in and blown out, thereby enabling at least a portion of one of the first air outlet 2 and the second air outlet 3 to be used for air intake and at least a portion of the other to be used for air outlet. This provides a guarantee for diverse air delivery modes, thereby realizing long-distance air outlet and short-distance air outlet and switching between them, enhancing the diversity of air delivery.

[0071] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0072] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0073] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not 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 on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0074] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0075] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0076] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An air conditioner indoor unit characterized by comprising: include: The indoor unit housing (1) has a mounting cavity (11) and a first air vent (2) and a second air vent (3) spaced apart along the height direction. At least a portion of one of the first air vent (2) and the second air vent (3) is used for air intake, and at least a portion of the other is used for air exhaust. A first fan component (4), an evaporator component (5), and a second fan component (6) are arranged sequentially along the height direction of the indoor unit casing (1). The first fan component (4) has a first air intake state and a first air outlet state, and the second fan component (6) has a second air intake state and a second air outlet state. When the first fan component (4) is in the first air intake state, the second fan component (6) is in the second air outlet state, so that the air flowing out of the first fan component (4) flows to the second fan component (6) through the evaporator component (5); when the second fan component (6) is in the second air intake state, the first fan component (4) is in the first air outlet state, so that the air flowing out of the second fan component (6) flows to the first fan component (4) through the evaporator component (5). At least one of the first fan component (4) and the second fan component (6) includes a centrifugal fan blade and an axial fan blade arranged coaxially. 2.The indoor unit of the air conditioner according to claim 1, characterized by, The first air vent (2) and the second air vent (3) are symmetrically distributed along the evaporator component (5); and / or, The first fan component (4) and the second fan component (6) are symmetrically distributed along the evaporator component (5). 3.The indoor unit of the air conditioner according to claim 1, characterized by, The first fan component (4) includes a first centrifugal fan blade (41) and a first axial fan blade (42). The first air passage (2) includes a first connecting port (21) and a first air outlet (22) spaced apart along the height direction. The first connecting port (21) is connected to the air inlet side or air outlet side of the first axial fan blade (42), and the first air outlet (22) is connected to the air outlet side of the first centrifugal fan blade (41). The second fan component (6) includes a second centrifugal fan blade (61) and a second axial fan blade (62). The second air outlet (3) includes a second air outlet (32) and a second connecting port (31) spaced apart along the height direction. The second air outlet (32) is connected to the air outlet side of the second centrifugal fan blade (61), and the second connecting port (31) is connected to the air inlet side or air outlet side of the second axial fan blade (62).

4. The indoor unit of the air conditioner according to claim 3, characterized in that, The first fan component (4) further includes a first volute (43), which has a first air inlet (431) and a third air outlet (432). The third air outlet (432) is connected to the air outlet side of the first air outlet (22). The first centrifugal fan blade (41) is disposed inside the first volute (43), and the first axial fan blade (42) is disposed outside the first volute (43). The second fan component (6) further includes a second volute (63), which has a second air inlet (631) and a fourth air outlet (632). The fourth air outlet (632) is connected to the air outlet side of the second air outlet (32). The second centrifugal fan blade (61) is disposed inside the second volute (63), and the second axial fan blade (62) is disposed outside the second volute (63).

5. The indoor unit of the air conditioner according to claim 3, characterized in that, When the first fan component (4) is in the first air intake state and the second fan component (6) is in the second air outlet state, the first axial flow fan blade (42) rotates in the reverse direction, and at least one of the second axial flow fan blade (62) and the second centrifugal fan blade (61) rotates in the forward direction, the forward direction and the reverse direction are opposite, the first connecting port (21) is opened, and at least one of the second air outlet (32) and the second connecting port (31) is opened; When the second fan component (6) is in the second air intake state and the first fan component (4) is in the first air outlet state, at least one of the first axial fan blade (42) and the first centrifugal fan blade (41) is configured to rotate in the forward direction, the second axial fan blade (62) is configured to rotate in the reverse direction, the second connecting port (31) is open, and at least one of the first connecting port (21) and the first air outlet (22) is open.

6. The indoor unit of the air conditioner according to claim 3, characterized in that, The first fan component (4) includes a first dual-shaft drive device (44), with the first axial flow fan blade (42) and the first centrifugal fan blade (41) disposed at the two output ends of the first dual-shaft drive device (44); the second fan component (6) includes a second dual-shaft drive device (64), with the second axial flow fan blade (62) and the second centrifugal fan blade (61) disposed at the two output ends of the second dual-shaft drive device (64); or, The first fan component (4) includes a first drive device and a second drive device. The first drive device is connected to the first axial flow fan blade (42) and the second drive device is connected to the first centrifugal fan blade (41). The second fan component (6) includes a third drive device and a fourth drive device. The third drive device is connected to the second axial flow fan blade (62) and the fourth drive device is connected to the second centrifugal fan blade (61).

7. The indoor unit of the air conditioner according to claim 1, characterized in that, The evaporator component (5) is arranged in a V-shape, with the open end of the evaporator component (5) facing the first fan component (4) or the second fan component (6).

8. The indoor unit of the air conditioner according to claim 3, characterized in that, The indoor unit of the air conditioner also includes: A flow guide component (7) is disposed in the mounting cavity (11) of the indoor unit housing (1), and at least one of the first connecting port (21), the first air outlet (22), the second air outlet (32), and the second connecting port (31) is provided with the flow guide component (7).

9. The indoor unit of the air conditioner according to claim 4, characterized in that, The outer periphery of the first volute (43) and the inner wall of the indoor unit housing (1) are spaced apart to form a first gap (12); and / or, The outer periphery of the second volute (63) and the inner wall of the indoor unit housing (1) are spaced apart to form a second gap (13). 10.The indoor unit of the air conditioner according to claim 4, characterized by, The first volute (43) has a first flow guide (45) on the side near the first connecting port (21), and the first flow guide (45) extends through the upper and lower ends of the first volute (43); and / or, The second volute (63) is provided with a second flow guide on the side near the second communication port (31), and the second flow guide is provided through the upper and lower ends of the second volute (63).

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