An air conditioner indoor unit

Abstract

The application discloses an air conditioner indoor unit, which comprises a casing, a volute, a flow distribution plate and a flow disturbing member. A first air outlet is arranged at the top of the front side of the casing, and at least part of a second air outlet is arranged at the bottom of the casing. The volute has a heat exchange air duct inside, and the heat exchange air duct has an air inlet end and an air outlet end. The flow distribution plate and the volute enclose a first air duct and a second air duct. The first air duct is communicated between the air outlet end and the first air outlet, and the second air duct is communicated between the air outlet end and the second air outlet. The flow disturbing member can rotate to different flow disturbing positions relative to the casing, so that at least one of the first air duct and the second air duct is communicated with the heat exchange air duct. When the second air duct is communicated with the heat exchange air duct, the distance between the first flow guide surface of the flow disturbing member and the volute gradually decreases along the airflow direction, so that the air duct section between the flow disturbing member and the volute gradually shrinks in cross section. The application can improve the air outlet speed through the air duct section gradually shrinking in cross section, and is beneficial to avoiding the airflow being sucked back by the internal negative pressure of the heat exchange fan.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, and in particular to an indoor air conditioning unit. Background Technology

[0002] In daily life, air conditioners have become the core equipment for regulating indoor temperature. Among them, the indoor unit of the air conditioner is a key component that directly interacts with the indoor environment, and its air delivery performance directly affects the cooling or heating efficiency and the user's comfort.

[0003] In related technologies, air conditioner indoor units typically use a fan as the power source for airflow. The fan generates airflow by rotating, and after the airflow exchanges heat with the evaporator, the fan can deliver the airflow into the room through the air outlet on the unit panel.

[0004] However, some indoor air conditioning units in related technologies suffer from low airflow velocity. When airflow with low airflow velocity is blown out of the air outlet, it is drawn back by the negative pressure inside the fan. This backflow not only significantly reduces the amount of air effectively delivered into the room, lowering the heat exchange efficiency of the air conditioner, but also causes the backflowing airflow to collide with the outflowing airflow, creating wind resistance problems. Utility Model Content

[0005] In view of the above-mentioned deficiencies in the related technologies, this application provides an air conditioner indoor unit to solve the problem of low air outlet velocity in the air conditioner indoor unit in the related technologies.

[0006] To address the aforementioned technical problems, in a first aspect, this application provides an air conditioner indoor unit, which includes:

[0007] The housing has an air inlet, a first air outlet and a second air outlet, the first air outlet is located at the top front side of the housing, and at least part of the second air outlet is located at the bottom of the housing.

[0008] A volute is disposed inside the housing. The volute has a heat exchange air duct inside, which has an air inlet and an air outlet. The air inlet is connected to the air inlet.

[0009] A heat exchange fan is installed inside the heat exchange duct. The heat exchange fan drives the airflow by rotating itself, so that the air enters the heat exchange duct through the air inlet and the air inlet end, and the air flows out of the heat exchange duct through the air outlet end.

[0010] A diverter plate is disposed on the front side of the volute. The diverter plate and the volute form a first air duct and a second air duct located below the first air duct. The first air duct connects the air outlet end and the first air outlet, and the second air duct connects the air outlet end and the second air outlet.

[0011] A baffle is disposed inside the housing and located between the volute and the splitter plate. The baffle is configured to guide the airflow direction of the air flowing out from the outlet end. The baffle can rotate relative to the housing to different baffle positions so that at least one of the first air duct and the second air duct is connected to the heat exchange air duct.

[0012] When the second air duct and the heat exchange air duct are connected, the baffle and the volute form part of the air duct wall of the second air duct, and the side of the baffle facing the second air duct has a first guide surface. The distance between the first guide surface and the volute gradually decreases along the airflow direction, so that the baffle and the volute form an air duct section with a gradually narrowing cross section.

[0013] In related technologies, for air conditioning indoor units with top and bottom air outlets, when only the bottom air outlet is exposed, the air volume is only 80% of that when the top and bottom air outlets are exposed simultaneously. This means that the air velocity is lower when only the bottom air outlet is exposed, making it easier for the airflow to be drawn back by the negative pressure inside the fan, which can easily cause wind resistance problems and result in less air being delivered into the room.

[0014] In this application, when the second air duct and the heat exchange air duct are connected, the baffle and the volute form part of the air duct wall of the second air duct. Since the distance between the first guide surface of the baffle facing the second air duct and the volute gradually decreases along the airflow direction, the baffle and the volute form an air duct section with a gradually narrowing cross section. Therefore, the air duct section between the baffle and the volute is equivalent to the inlet section (i.e., the contraction section) of the Venturi tube.

[0015] According to the principle of the Venturi tube, when the airflow passes through the inlet section of the Venturi tube, the airflow velocity will increase. Since the second air duct is connected to the second air outlet, which is at least partially located at the bottom of the casing, when the airflow is discharged downwards alone, after the airflow enters the second air duct from the outlet end of the heat exchange air duct, and when the airflow passes through the air duct section between the baffle and the volute, the airflow velocity will increase. This can increase the airflow velocity of the second air duct and the second air outlet, that is, increase the airflow velocity when discharging downwards alone. This helps to prevent the airflow from being drawn back by the internal negative pressure of the heat exchange fan. In this way, it not only helps to increase the air volume delivered into the room and enhance the heat exchange efficiency of the indoor unit of the air conditioner, but also helps to avoid the problem of wind resistance.

[0016] Optionally, the side of the spoiler facing the second air duct also has a second guide surface, which is connected downstream of the first guide surface along the airflow direction, and the distance between the second guide surface and the volute gradually increases along the airflow direction.

[0017] This configuration causes the cross-section of the air duct section between the spoiler and the volute to first gradually narrow and then gradually expand along the airflow direction, thus forming a Venturi tube structure with a "contraction section - throat - diffuser section". The diffuser section corresponds to the air duct section between the second guide surface and the volute, and the throat corresponds to the air duct section located between the first and second guide surfaces.

[0018] According to the principle of the Venturi tube, when the accelerated airflow passes through the air duct section between the second guide surface and the volute, the high-speed airflow accelerated by the contraction section can smoothly transition, avoiding the eddies and impact losses that are easily generated if the cross-section of the air duct suddenly expands. This allows the kinetic energy of the airflow to be slowly converted into pressure energy, which can prevent airflow turbulence caused by a sudden drop in flow velocity, and maintain the stable delivery state of the airflow after acceleration. This ensures that the increased wind speed when the air is discharged alone does not decrease significantly, continuously resists the internal negative pressure back suction of the heat exchange fan, and ensures effective airflow.

[0019] Optionally, the first guide surface has a first end disposed away from the air outlet end in the airflow direction, and the first end and the volute have a first distance a in the vertical plane;

[0020] The second guide surface has a second end located away from the first guide surface in the airflow direction, and there is a second distance b between the second end and the volute in the vertical plane;

[0021] The second air outlet has a first dimension c in the vertical plane, and the first dimension c, the second spacing b, and the first spacing a satisfy: a≤b≤c.

[0022] With this configuration, 'a', as the minimum spacing downstream of the first guide surface, can continue the core function of "gradual acceleration" in the contraction section, ensuring that the airflow reaches a high velocity here to counteract the negative pressure back suction of the heat exchange fan.

[0023] The constraint that b≥a allows the gradually widening distance between the second guide surface and the volute to smoothly transition from a to b, avoiding the generation of eddies and kinetic energy loss in high-speed airflow due to a sudden increase in distance, ensuring that the flow velocity does not decrease significantly after acceleration, and maintaining stable airflow.

[0024] The constraint of b≤c allows the distance between the second end of the second guide surface and the volute to match the size of the second air outlet, so that the airflow guided by the second guide surface can smoothly enter the second air outlet. This avoids airflow congestion or leakage due to the mismatch between the size of the air duct section outlet and the second air outlet, ensuring that the accelerated airflow is efficiently delivered to the room, thereby improving the heat exchange efficiency and air delivery effect of the air conditioning indoor unit.

[0025] Optionally, the air outlet has a second dimension d in the vertical plane, and the second dimension d and the first spacing a satisfy: a <d。

[0026] With this arrangement, d is the dimension of the air outlet end, which represents the initial flow cross-sectional area when air flows from the heat exchange air duct into the second air duct. The limitation of a < d enables the cross section of the second air duct to smoothly contract from d to a after receiving the airflow at the air outlet end. This contraction process can effectively guarantee the stable implementation of the design function of "gradual contraction acceleration", ensure that the airflow reaches a wind speed sufficient to counteract the negative pressure back suction in the heat exchange fan in the area of the first flow guide surface, and at the same time make the transition of airflow from the air outlet end to the first flow guide surface smoother, reducing eddy currents and energy loss caused by sudden cross-section changes.

[0027] Optionally, the second dimension d and the first spacing a further satisfy: a < 0.9d.

[0028] With this arrangement, for the cross section of the air duct segment from the air outlet end to the first end of the first flow guide surface, it is beneficial to ensure a contraction of at least 10%. This clear contraction amplitude enables the airflow velocity to obtain a predictable significant increase, which is further beneficial to ensure that the airflow forms a wind speed sufficient to counteract the negative pressure back suction in the heat exchange fan in the area of the first flow guide surface. In addition, a contraction of more than 10% is not only beneficial to achieving the target wind speed, but also avoids causing severe eddy currents or impact losses to the airflow due to excessive contraction, thereby reducing energy loss.

[0029] Optionally, the second dimension d and the first dimension c satisfy: c ≥ d.

[0030] With this arrangement, d is the initial flow dimension for airflow entering the second air duct from the heat exchange air duct, and c is the outlet dimension for the airflow finally being discharged into the room. The limitation of c ≥ d can ensure that the outlet cross section of the second air duct is not smaller than the inlet cross section, and avoid the "bottleneck effect" caused by an excessively small outlet dimension. That is, it can not only prevent the sudden drop of flow velocity and kinetic energy loss caused by airflow congestion at the outlet, but also allow the airflow accelerated by the first flow guide surface to pass through the second air outlet smoothly, reducing the retention or backflow of airflow at the end of the air duct, and ensuring that the effective air output is not limited by the outlet dimension.

[0031] Optionally, the first flow guide surface is an arc surface recessed toward the direction away from the second air duct, and the second flow guide surface is an arc surface recessed toward the direction away from the second air duct;

[0032] A connecting arc surface is connected between the first flow guide surface and the second flow guide surface, and the connecting arc surface protrudes toward the second air duct.

[0033] With this arrangement, firstly, the recessed arc surface is more conducive to smoothly fitting the flow trajectory of airflow, avoiding eddy currents caused by abrupt shape of the flow guide surface, ensuring that airflow always maintains a stable flow state during the processes of "gradual contraction acceleration" on the first flow guide surface and "gradual expansion and flow stabilization" on the second flow guide surface, and reducing kinetic energy loss.

[0034] Secondly, the protrusions connecting the curved surfaces can cleverly connect the two concave curved surfaces, eliminating the sharp corners or broken lines at the junction, making the change in airflow direction smoother when transitioning from the first guide surface to the second guide surface, further avoiding local airflow turbulence, ensuring that the flow velocity does not drop suddenly after acceleration, and continuously resisting the negative pressure back suction of the heat exchange fan.

[0035] Optionally, when the first air duct and the heat exchange air duct are connected, the baffle and the volute form part of the air duct wall of the first air duct, and the side of the baffle facing the first air duct has a third guide surface.

[0036] The third guide surface is disposed on the side of the turbulence member that is away from the first guide surface and the second guide surface, and the third guide surface is planar.

[0037] With this configuration, the third guide surface is located on both sides of the first and second guide surfaces, allowing the spoiler to adapt to the guide requirements of the first and second air ducts simply by rotating, without the need for additional guide structures. This simplifies the overall structural design and reduces manufacturing costs and assembly complexity.

[0038] Secondly, the third guide surface of the planar structure is easy to process and its shape accuracy is easy to control, which can reduce airflow turbulence caused by processing errors of the third guide surface and further ensure the air supply stability of the first air duct.

[0039] Optionally, the spoiler has three different spoiler positions, namely a first spoiler position, a second spoiler position, and a third spoiler position;

[0040] When the deflector is located at the first deflection position, the second air duct is connected to the air outlet, and the deflector closes the first air duct.

[0041] When the deflector is located at the second deflection position, the first air duct is connected to the air outlet, and the deflector closes the second air duct.

[0042] When the airflow spoiler is located at the third airflow position, both the first air duct and the second air duct are connected to the air outlet.

[0043] This configuration allows the indoor unit of the air conditioner to flexibly switch between three modes: single downward air outlet, single upward air outlet, and simultaneous upward and downward air outlet, precisely matching user needs in different scenarios. For example, in summer cooling, a single upward air outlet can prevent cold air from blowing directly on people; in winter heating, a single downward air outlet facilitates the downward flow of warm air to cover the entire room; and in spring and autumn, simultaneous upward and downward air outlets can achieve rapid and uniform adjustment of indoor temperature, significantly improving user comfort.

[0044] On the other hand, since the three air outlet modes can be switched by adjusting the position of a single component, the air deflector, there is no need to add multiple air guide structures. This further simplifies the internal structure design of the whole machine, reduces the number of parts, reduces assembly complexity, and also reduces the risk of failure that may occur when multiple parts work together, thus improving the reliability of the equipment operation.

[0045] Optionally, the volute includes:

[0046] The volute body has a first surface facing the heat exchange duct, the first surface extending downward relative to the horizontal direction and having a first angle with the horizontal direction;

[0047] The volute tongue and the volute body are spaced apart and together form the heat exchange air duct; the volute tongue has a second side and a third side arranged opposite to each other, the second side faces the heat exchange air duct, the third side extends to the top of the diverter plate, the third side is inclined upward relative to the horizontal direction and has a second included angle with the horizontal direction.

[0048] With this design, on the one hand, the downward extension angle of the first surface of the volute body can be adapted to the air outlet direction of the heat exchange fan, guiding the airflow blown out by the heat exchange fan to enter the second air duct more smoothly, reducing the impact and collision between the airflow and the volute body, and reducing flow resistance and energy loss.

[0049] The upward tilt angle of the third surface of the volute tongue allows the airflow blown from the outlet to enter the first air duct more smoothly, reducing the impact and collision between the airflow and the volute tongue, and reducing flow resistance and energy loss. Attached Figure Description

[0050] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0051] Figure 1 A cross-sectional view of the indoor unit of the air conditioner in the down-discharge mode provided in the embodiments of this application;

[0052] Figure 2 A cross-sectional view of the indoor unit of the air conditioner in the top-discharge mode provided in the embodiments of this application;

[0053] Figure 3 A cross-sectional view of the indoor unit of the air conditioner in the up-and-down air outlet mode provided in the embodiments of this application;

[0054] Figure 4 This is a schematic diagram of the structure of the aerodynamic component provided in the embodiments of this application;

[0055] Figure 5 for Figure 1 One of the enlarged views of part A in the middle;

[0056] Figure 6 for Figure 2 One of the enlarged views of part B in the middle;

[0057] Figure 7 for Figure 1 The second enlarged view of part A in the middle;

[0058] Figure 8 for Figure 2 The second enlarged view of part B.

[0059] Explanation of reference numerals in the attached figures:

[0060] 1-Casing; 11-Air inlet; 12-First air outlet; 13-Second air outlet; 14-Diverter plate;

[0061] 2-Volume casing; 21-Heat exchange air duct; 211-Air inlet; 212-Air outlet; 22-Volume casing body; 221-First side; 23-Volume tongue; 231-Second side; 232-Third side;

[0062] 3-Heat exchange fan; 4-First air duct; 5-Second air duct;

[0063] 6-Breakthrough component; 61-First guide surface; 62-Second guide surface; 63-Connecting arc surface; 64-Third guide surface. Detailed Implementation

[0064] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0065] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0066] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0067] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0068] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0069] As described in the background section of this application, air conditioners have become the core equipment for regulating indoor temperature in daily life. The indoor unit of the air conditioner, as a key component that directly interacts with the indoor environment, directly affects the cooling or heating efficiency and the user's comfort.

[0070] In related technologies, air conditioner indoor units typically use a fan as the power source for airflow. The fan generates airflow by rotating, and after the airflow exchanges heat with the evaporator, the fan can deliver the airflow into the room through the air outlet on the unit panel.

[0071] However, some indoor air conditioning units in related technologies suffer from low airflow velocity. When airflow with low airflow velocity is blown out of the air outlet, it is drawn back by the negative pressure inside the fan. This backflow not only significantly reduces the amount of air effectively delivered into the room, lowering the heat exchange efficiency of the air conditioner, but also causes the backflowing airflow to collide with the outflowing airflow, creating wind resistance problems.

[0072] In view of the above-mentioned problems, this application provides an air conditioner indoor unit to solve the problem of low air outlet velocity in air conditioner indoor units in related technologies.

[0073] The technical solution of this application will be further described below with reference to specific embodiments and accompanying drawings:

[0074] In some alternative embodiments, such as Figure 1As shown, the indoor unit of the air conditioner includes a housing 1, on which an air inlet 11, a first air outlet 12 and a second air outlet 13 are provided. The first air outlet 12 is located at the top of the front side of the housing 1, and at least part of the second air outlet 13 is located at the bottom of the housing 1.

[0075] With this configuration, air can be discharged upwards through the first air outlet 12 and downwards through the second air outlet 13. Air can be discharged both upwards and downwards through the first air outlet 12 and the second air outlet 13. This enriches the air outlet modes of the air conditioner indoor unit, enabling it to adapt to different usage scenarios and thus enhancing its practicality.

[0076] In some alternative embodiments, such as Figure 1 As shown, the indoor unit of the air conditioner also includes a volute 2, which is located inside the housing 1. The volute 2 has a heat exchange air duct 21 inside, which has an air inlet end 211 and an air outlet end 212. The air inlet end 211 is connected to the air inlet 11.

[0077] With this configuration, the heat exchange duct 21 can form sufficient heat exchange space inside the air conditioner indoor unit, ensuring that the air entering the heat exchange duct 21 through the air inlet 11 and the air inlet end 211 can fully contact the heat exchange components, ensuring that the air can fully complete the cooling or heating process, thereby improving the overall heat exchange efficiency of the air conditioner indoor unit and making the delivered air temperature more in line with user needs.

[0078] In some alternative embodiments, such as Figure 1 As shown, the indoor unit of the air conditioner also includes a heat exchange fan 3, which is installed in the heat exchange duct 21. The heat exchange fan 3 is used to drive the air flow by rotating itself, so that the air enters the heat exchange duct 21 through the air inlet 11 and the air inlet end 211, and the air flows out of the heat exchange duct 21 through the air outlet end 212.

[0079] With this configuration, the heat exchange fan 3 generates airflow driving force through its own rotation, which can effectively break the limitations of natural air flow and force air flow, thereby ensuring that the indoor unit of the air conditioner continuously obtains sufficient air for processing and ensures that sufficient air is delivered from the indoor unit to the outside.

[0080] In some alternative embodiments, such as Figure 1 As shown, the indoor unit of the air conditioner also includes a diverter plate 14, which is disposed on the front side of the volute 2, as shown. Figure 1 , Figure 2 and Figure 3 As shown, the diverter plate 14 and the volute 2 form a first air duct 4 and a second air duct 5 located below the first air duct 4. The first air duct 4 connects the air outlet 212 and the first air outlet 12, and the second air duct 5 connects the air outlet 212 and the second air outlet 13.

[0081] This configuration enables precise air diversion from the air outlet 212, preventing air from spreading randomly inside the casing 1 and causing airflow turbulence. It ensures that air is directed along the first air duct 4 and the second air duct 5 to the corresponding first air outlet 12 and second air outlet 13, which helps solve the problem of uneven airflow from different air outlets and mutual airflow interference when using a single air duct. It also helps ensure the stability and independence of airflow from each air outlet.

[0082] In some alternative embodiments, such as Figure 1 As shown, the indoor unit of the air conditioner also includes a baffle 6, which is disposed inside the casing 1 and located between the volute 2 and the diffuser 14. The baffle 6 is configured to guide the airflow direction of the air flowing out from the air outlet 212, such as... Figure 1 , Figure 2 and Figure 3 As shown, the turbulence-disrupting element 6 can be rotated relative to the housing 1 to different turbulence-disrupting positions so that at least one of the first air duct 4 and the second air duct 5 is connected to the heat exchange air duct 21.

[0083] With this configuration, at least one of the first air duct 4 and the second air duct 5 can be connected to the heat exchange air duct 21 through the single component 6, without the need for additional flow guiding structures. This simplifies the overall structural design and reduces manufacturing costs and assembly complexity.

[0084] In some alternative embodiments, such as Figure 1 As shown, when the second air duct 5 and the heat exchange air duct 21 are connected, the turbulence-inducing element 6 and the volute 2 form part of the air duct wall of the second air duct 5, and as... Figure 4 and Figure 5 As shown, the side of the spoiler 6 facing the second air duct 5 has a first guide surface 61. The distance between the first guide surface 61 and the volute 2 gradually decreases along the airflow direction, so that the spoiler 6 and the volute 2 form an air duct section with a gradually narrowing cross section.

[0085] This configuration makes the air duct section between the baffle 6 and the volute 2 equivalent to the inlet section (i.e., the contraction section) of a Venturi tube. According to the principle of the Venturi tube, the airflow velocity will increase when the airflow passes through the inlet section of the Venturi tube. Therefore, when the airflow enters the second air duct 5 from the outlet 212 of the heat exchange air duct 21, and when the airflow passes through the air duct section between the baffle 6 and the volute 2, the airflow velocity will increase. This can improve the outlet air velocity of the second air duct 5 and the second outlet 13, which helps to prevent the airflow from being sucked back by the internal negative pressure of the heat exchange fan 3. This not only helps to increase the air volume delivered into the room and enhance the heat exchange efficiency of the indoor unit of the air conditioner, but also helps to avoid the problem of wind resistance.

[0086] In some alternative embodiments, such as Figure 1As shown, the indoor unit of the air conditioner includes a casing 1, a volute 2, a heat exchange fan 3, a flow divider 14, and a baffle 6.

[0087] The casing 1 has an air inlet 11, a first air outlet 12, and a second air outlet 13. The first air outlet 12 is located at the top front side of the casing 1, and at least part of the second air outlet 13 is located at the bottom of the casing 1. A volute 2 is located inside the casing 1, and the volute 2 has a heat exchange duct 21 inside. The heat exchange duct 21 has an air inlet end 211 and an air outlet end 212, with the air inlet end 211 communicating with the air inlet 11. A heat exchange fan 3 is located inside the heat exchange duct 21. The heat exchange fan 3 drives airflow through its own rotation, allowing air to enter the heat exchange duct 21 through the air inlet 11 and the air inlet end 211, and to exit the heat exchange duct 21 through the air outlet end 212.

[0088] The manifold 14 is located on the front side of the volute 2, such as Figure 1 , Figure 2 and Figure 3 As shown, the diverter plate 14 and the volute 2 form a first air duct 4 and a second air duct 5 located below the first air duct 4. The first air duct 4 connects the air outlet 212 and the first air outlet 12, and the second air duct 5 connects the air outlet 212 and the second air outlet 13.

[0089] The airflow deflector 6 is disposed within the housing 1 and located between the volute 2 and the diffuser 14. The airflow deflector 6 is configured to guide the airflow direction of the air exiting the outlet 212, such as... Figure 1 , Figure 2 and Figure 3 As shown, the turbulence-disrupting element 6 can be rotated relative to the housing 1 to different turbulence-disrupting positions so that at least one of the first air duct 4 and the second air duct 5 is connected to the heat exchange air duct 21.

[0090] like Figure 1 As shown, when the second air duct 5 and the heat exchange air duct 21 are connected, the turbulence-inducing element 6 and the volute 2 form part of the air duct wall of the second air duct 5, and as... Figure 4 and Figure 5 As shown, the side of the spoiler 6 facing the second air duct 5 has a first guide surface 61. The distance between the first guide surface 61 and the volute 2 gradually decreases along the airflow direction, so that the spoiler 6 and the volute 2 form an air duct section with a gradually narrowing cross section.

[0091] In related technologies, for air conditioning indoor units with top and bottom air outlets, when only the bottom air outlet is exposed, the air volume is only 80% of that when the top and bottom air outlets are exposed simultaneously. This means that the air velocity is lower when only the bottom air outlet is exposed, making it easier for the airflow to be drawn back by the negative pressure inside the fan, which can easily cause wind resistance problems and result in less air being delivered into the room.

[0092] In this application, when the second air duct 5 and the heat exchange air duct 21 are connected, the baffle 6 and the volute 2 form part of the air duct wall of the second air duct 5. Since the distance between the first guide surface 61 of the baffle 6 facing the second air duct 5 and the volute 2 gradually decreases along the airflow direction, the baffle 6 and the volute 2 form an air duct section with a gradually narrowing cross section. Therefore, the air duct section between the baffle 6 and the volute 2 is equivalent to the inlet section (i.e., the contraction section) of the Venturi tube.

[0093] According to the principle of the Venturi tube, when the airflow passes through the inlet section of the Venturi tube, the airflow velocity will increase. Since the second air duct 5 is connected to the second air outlet 13, which is at least partially located at the bottom of the casing 1, when the airflow flows into the second air duct 5 from the outlet end 212 of the heat exchange air duct 21, and when the airflow passes through the air duct section between the baffle 6 and the volute 2, the airflow velocity will increase. This can increase the airflow velocity of the second air duct 5 and the second air outlet 13, that is, increase the airflow velocity when the airflow is discharged from the bottom alone. This helps to prevent the airflow from being sucked back by the internal negative pressure of the heat exchange fan 3. This not only helps to increase the air volume delivered into the room and enhance the heat exchange efficiency of the indoor unit of the air conditioner, but also helps to avoid the problem of wind resistance.

[0094] Furthermore, in some alternative embodiments, such as Figure 4 and Figure 5 As shown, the side of the spoiler 6 facing the second air duct 5 also has a second guide surface 62. The second guide surface 62 is connected to the downstream of the first guide surface 61 along the airflow direction. The distance between the second guide surface 62 and the volute 2 gradually increases along the airflow direction.

[0095] This configuration causes the cross-section of the air duct section between the spoiler 6 and the volute 2 to gradually narrow and then expand along the airflow direction, thus forming a Venturi tube structure with a "contraction section - throat - diffuser section". The diffuser section corresponds to the air duct section between the second guide surface 62 and the volute 2, and the throat corresponds to the air duct section located between the first guide surface 61 and the second guide surface 62.

[0096] According to the principle of the Venturi tube, when the accelerated airflow flows through the air duct section between the second guide surface 62 and the volute 2, it can smoothly transition the high-speed airflow accelerated by the contraction section, avoiding the eddies and impact losses that are easily generated if the cross-section of the air duct suddenly expands. This allows the kinetic energy of the airflow to be slowly converted into pressure energy, which can prevent the airflow turbulence caused by the sudden drop in flow velocity, and maintain the stable delivery state of the airflow after acceleration. This ensures that the increased wind speed when the air is discharged alone does not decrease significantly, continuously resists the internal negative pressure back suction of the heat exchange fan 3, and ensures effective airflow.

[0097] In other embodiments, the side of the baffle 6 facing the second air duct 5 has only a first guide surface 61. That is, when the second air duct 5 and the heat exchange air duct 21 are connected, the baffle 6 and the volute 2 only form an air duct section with a gradually narrowing cross section.

[0098] This design simplifies the structure of the spoiler 6 and facilitates its processing and manufacturing.

[0099] Furthermore, in some optional embodiments, the first guide surface 61 has a first end located away from the air outlet 212 in the airflow direction, such as... Figure 5 As shown, there is a first distance a between the first end and the volute 2 in the vertical plane.

[0100] The second guide surface 62 has a second end located away from the first guide surface 61 in the airflow direction, such as... Figure 5 As shown, there is a second distance b between the second end and the volute 2 in the vertical plane.

[0101] like Figure 5 As shown, the second air outlet 13 has a first dimension c in the vertical plane. The first dimension c, the second spacing b, and the first spacing a satisfy: a≤b≤c.

[0102] With this configuration, 'a', as the minimum spacing downstream of the first guide surface 61, can continue the core function of the contraction section's "gradual acceleration," ensuring that the airflow reaches a high velocity here to counteract the negative pressure back suction of the heat exchange fan 3.

[0103] The constraint that b≥a allows the gradually widening distance between the second guide surface 62 and the volute 2 to smoothly transition from a to b, avoiding the generation of eddies and kinetic energy loss in high-speed airflow due to a sudden increase in distance, ensuring that the flow velocity does not decrease significantly after acceleration, and maintaining stable airflow.

[0104] The limitation of b≤c allows the distance between the second end of the second guide surface 62 and the volute 2 to be adapted to the size of the second air outlet 13, so that the airflow guided by the second guide surface 62 can smoothly enter the second air outlet 13, avoiding airflow congestion or leakage due to the mismatch between the size of the air duct section outlet and the second air outlet 13, ensuring that the accelerated airflow is efficiently delivered to the room, and improving the heat exchange efficiency and air delivery effect of the air conditioner indoor unit.

[0105] In some alternative embodiments, such as Figure 5 As shown, the air outlet 212 has a second dimension d in the vertical plane, and the second dimension d and the first spacing a satisfy: a <d。

[0106] With this arrangement, d serves as the size of the air outlet end 212, representing the initial flow cross-sectional area when airflow enters the second air duct 5 from the heat exchange air duct 21. The limitation of a<d enables the cross-section of the second air duct 5 to smoothly contract from d to a after receiving the airflow from the air outlet end 212. This contraction process can effectively guarantee the stable implementation of the design function of "gradual contraction for acceleration", ensure that the airflow in the area of the first flow guide surface 61 reaches a wind speed sufficient to counteract the negative pressure back suction in the heat exchange fan 3, and meanwhile make the transition of airflow from the air outlet end 212 to the first flow guide surface 61 smoother, reducing eddy currents and energy loss caused by sudden cross-section changes.

[0107] Further, in some alternative embodiments, the second dimension d and the first spacing a further satisfy: a<0.9d.

[0108] With this arrangement, for the cross-section of the air duct section from the air outlet end 212 to the first end of the first flow guide surface 61, it is beneficial to ensure a contraction of at least 10%. This clear contraction amplitude enables a predictable and significant increase in airflow velocity, which is beneficial to further ensure that the airflow forms a wind speed sufficient to counteract the negative pressure back suction in the heat exchange fan 3 in the area of the first flow guide surface 61. In addition, a contraction of more than 10% is not only beneficial to achieving the target wind speed, but also avoids causing intense eddy currents or impact loss of the airflow due to excessive contraction, reducing energy loss.

[0109] In some alternative embodiments, as Figure 5 shows, the second dimension d and the first dimension c satisfy: c≥d.

[0110] With this arrangement, d is the initial flow dimension of airflow entering the second air duct 5 from the heat exchange air duct 21, and c is the outlet dimension of airflow finally delivered to the room. The limitation of c≥d can ensure that the outlet cross-section of the second air duct 5 is not smaller than the inlet cross-section, avoiding the "bottleneck effect" formed by too small outlet size. That is, it can not only prevent the sudden drop of flow velocity and kinetic energy loss caused by airflow congestion at the outlet, but also allow the airflow accelerated by the first flow guide surface 61 to pass through the second air outlet 13 smoothly, reducing the retention or backflow of airflow at the end of the air duct, and ensuring that the effective air output is not limited by the outlet size.

[0111] In some alternative embodiments, as Figure 4 and Figure 5 shows, the first flow guide surface 61 is an arc surface recessed toward the direction away from the second air duct 5, the second flow guide surface 62 is an arc surface recessed toward the direction away from the second air duct 5, a connecting arc surface 63 is connected between the first flow guide surface 61 and the second flow guide surface 62, and the connecting arc surface 63 protrudes toward the second air duct 5.

[0112] This design, firstly, allows the concave arc surface to more smoothly conform to the airflow trajectory, avoiding the generation of vortices caused by the abrupt shape of the guide surface, ensuring that the airflow maintains a stable flow state throughout the "gradual contraction and acceleration" of the first guide surface 61 and the "gradual expansion and stabilization" of the second guide surface 62, thereby reducing kinetic energy loss.

[0113] Secondly, the protrusion of the connecting arc surface 63 can cleverly connect the two concave arc surfaces, eliminating the sharp corners or broken lines at the connection point, making the change in direction of the airflow more gradual when it transitions from the first guide surface 61 to the second guide surface 62, further avoiding local airflow turbulence, ensuring that the flow velocity does not drop suddenly after acceleration, and continuously resisting the negative pressure back suction of the heat exchange fan 3.

[0114] In other embodiments, the first guide surface 61 and the second guide surface 62 can also be planar, which simplifies the structure of the first guide surface 61 and the second guide surface 62 and facilitates the processing of the first guide surface 61 and the second guide surface 62.

[0115] In some alternative embodiments, such as Figure 2 As shown, when the first air duct 4 and the heat exchange air duct 21 are connected, the turbulence-inducing element 6 and the volute 2 form part of the air duct wall of the first air duct 4, and as... Figure 4 and Figure 6 As shown, the side of the spoiler 6 facing the first air duct 4 has a third guide surface 64. The third guide surface 64 is disposed on the side of the spoiler 6 away from the first guide surface 61 and the second guide surface 62, and the third guide surface 64 is planar.

[0116] With this configuration, the third guide surface 64, the first guide surface 61, and the second guide surface 62 are respectively located on both sides of the baffle 6, so that the baffle 6 can adapt to the guide requirements of the first air duct 4 and the second air duct 5 by simply rotating, without the need for additional guide structures, which simplifies the overall structural design and reduces manufacturing costs and assembly complexity.

[0117] Secondly, the third guide surface 64 of the planar structure is easy to process and its shape accuracy is easy to control, which can reduce airflow turbulence caused by the processing error of the third guide surface 64, and further ensure the air supply stability of the first air duct 4.

[0118] In other embodiments, the third guide surface 64 can be an arc surface protruding towards the first air duct 4, or an arc surface recessed in the direction away from the first air duct 4. The structure of the third guide surface 64 is flexible and can be set according to actual needs. This application embodiment does not make specific limitations in this regard.

[0119] In some optional embodiments, the spoiler 6 has three different spoiler positions, namely a first spoiler position, a second spoiler position, and a third spoiler position.

[0120] like Figure 1 As shown, when the deflector 6 is in the first deflection position, the second air duct 5 is connected to the air outlet 212, and the deflector 6 closes the first air duct 4; as Figure 2 As shown, when the spoiler 6 is in the second spoiler position, the first air duct 4 is connected to the air outlet 212, and the spoiler 6 closes the second air duct 5; as Figure 3 As shown, when the turbulence-disrupting component 6 is in the third turbulence-disrupting position, both the first air duct 4 and the second air duct 5 are connected to the air outlet 212.

[0121] This design allows the indoor unit to flexibly switch between three modes: single downward airflow, single upward airflow, and simultaneous upward and downward airflow, precisely matching user needs in different scenarios. For example, in summer cooling, single upward airflow prevents cold air from blowing directly on people; in winter heating, single downward airflow helps warm air sink and cover the entire room; and in spring and autumn, simultaneous upward and downward airflow enables rapid and uniform adjustment of indoor temperature, significantly improving user comfort.

[0122] On the other hand, since the three air outlet modes can be switched by adjusting the position of a single component, the spoiler 6, there is no need to add multiple air guide structures. This further simplifies the internal structure design of the whole machine, reduces the number of parts, reduces assembly complexity, and also reduces the risk of failure that may occur when multiple parts work together, thus improving the reliability of the equipment operation.

[0123] In some alternative embodiments, such as Figure 1 As shown, the volute 2 includes a volute body 22 and a volute tongue 23, wherein the volute body 22 has a first surface 221 facing the heat exchange duct 21, as shown in the figure. Figure 7 As shown, the first surface 221 extends downward relative to the horizontal direction and has a first angle e between it and the horizontal direction.

[0124] like Figure 1 As shown, the volute tongue 23 and the volute body 22 are spaced apart and together form a heat exchange duct 21. The volute tongue 23 has a second surface 231 and a third surface 232 that are arranged opposite to each other. The second surface 231 faces the heat exchange duct 21, and the third surface 232 extends towards the top of the flow divider plate 14, as shown. Figure 8 As shown, the third surface 232 is inclined upward relative to the horizontal direction and has a second angle f with the horizontal direction.

[0125] With this configuration, on the one hand, the downward extension angle of the first surface 221 of the volute body 22 can be adapted to the air outlet direction of the heat exchange fan 3, guiding the airflow blown out by the heat exchange fan 3 to enter the second air duct 5 more smoothly, reducing the impact and collision between the airflow and the volute body 22, and reducing flow resistance and energy loss.

[0126] The upward tilt angle of the third surface 232 of the volute tongue 23 allows the third surface 232 to guide the airflow blown from the air outlet 212 into the first air duct 4 more smoothly, reducing the impact and collision between the airflow and the volute tongue 23, and reducing flow resistance and energy loss.

[0127] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An indoor unit for an air conditioner, characterized in that, include: The housing has an air inlet, a first air outlet and a second air outlet, the first air outlet is located at the top front side of the housing, and at least part of the second air outlet is located at the bottom of the housing. A volute is disposed inside the housing. The volute has a heat exchange air duct inside, which has an air inlet and an air outlet. The air inlet is connected to the air inlet. A heat exchange fan is installed inside the heat exchange duct. The heat exchange fan drives the airflow by rotating itself, so that the air enters the heat exchange duct through the air inlet and the air inlet end, and the air flows out of the heat exchange duct through the air outlet end. A diverter plate is disposed on the front side of the volute. The diverter plate and the volute form a first air duct and a second air duct located below the first air duct. The first air duct connects the air outlet end and the first air outlet, and the second air duct connects the air outlet end and the second air outlet. A baffle is disposed inside the housing and located between the volute and the splitter plate. The baffle is configured to guide the airflow direction of the air flowing out from the outlet end. The baffle can rotate relative to the housing to different baffle positions so that at least one of the first air duct and the second air duct is connected to the heat exchange air duct. When the second air duct and the heat exchange air duct are connected, the baffle and the volute form part of the air duct wall of the second air duct, and the side of the baffle facing the second air duct has a first guide surface. The distance between the first guide surface and the volute gradually decreases along the airflow direction, so that the baffle and the volute form an air duct section with a gradually narrowing cross section.

2. The indoor unit of the air conditioner according to claim 1, characterized in that, The side of the spoiler facing the second air duct also has a second guide surface, which is connected to the downstream of the first guide surface along the airflow direction. The distance between the second guide surface and the volute gradually increases along the airflow direction.

3. The indoor unit of the air conditioner according to claim 2, characterized in that, The first guide surface has a first end located away from the air outlet end in the airflow direction, and there is a first distance a between the first end and the volute in the vertical plane; The second guide surface has a second end located away from the first guide surface in the airflow direction, and there is a second distance b between the second end and the volute in the vertical plane; The second air outlet has a first dimension c in the vertical plane, and the first dimension c, the second spacing b, and the first spacing a satisfy: a≤b≤c.

4. The indoor unit of the air conditioner according to claim 3, characterized in that, The air outlet has a second dimension d in the vertical plane, and the second dimension d and the first spacing a satisfy: a <d。 5. The indoor unit of the air conditioner according to claim 4, characterized in that, The second dimension d and the first spacing a also satisfy: a < 0.9d.

6. The indoor unit of the air conditioner according to claim 4 or 5, characterized in that, The second dimension d and the first dimension c satisfy: c ≥ d.

7. The indoor unit of the air conditioner according to any one of claims 2-5, characterized in that, The first guide surface is an arc surface that is concave in the direction away from the second air duct, and the second guide surface is an arc surface that is concave in the direction away from the second air duct; A connecting arc surface is provided between the first guide surface and the second guide surface, and the connecting arc surface protrudes toward the second air duct.

8. The indoor unit of the air conditioner according to claim 7, characterized in that, When the first air duct and the heat exchange air duct are connected, the baffle and the volute form part of the air duct wall of the first air duct, and the side of the baffle facing the first air duct has a third guide surface. The third guide surface is disposed on the side of the turbulence member that is away from the first guide surface and the second guide surface, and the third guide surface is planar.

9. The indoor unit of an air conditioner according to any one of claims 1-5, characterized in that, The spoiler has three different spoiler positions, namely a first spoiler position, a second spoiler position, and a third spoiler position; When the deflector is located at the first deflection position, the second air duct is connected to the air outlet, and the deflector closes the first air duct. When the deflector is located at the second deflection position, the first air duct is connected to the air outlet, and the deflector closes the second air duct. When the airflow spoiler is located at the third airflow position, both the first air duct and the second air duct are connected to the air outlet.

10. The indoor unit of an air conditioner according to any one of claims 1-5, characterized in that, The volute includes: The volute body has a first surface facing the heat exchange duct, the first surface extending downward relative to the horizontal direction and having a first angle with the horizontal direction; The volute tongue and the volute body are spaced apart and together form the heat exchange air duct; the volute tongue has a second side and a third side arranged opposite to each other, the second side faces the heat exchange air duct, the third side extends to the top of the diverter plate, the third side is inclined upward relative to the horizontal direction and has a second included angle with the horizontal direction.

Images