Air conditioner indoor unit and air conditioner

Abstract

This invention discloses an indoor air conditioning unit and an air conditioner. The indoor air conditioning unit includes a casing and an air duct switching plate. The casing forms an air duct, an air inlet, a first air outlet, and a second air outlet located above the first air outlet. The air duct includes an air inlet section adjacent to the air inlet, a first air outlet section adjacent to the first air outlet, and a second air outlet section adjacent to the second air outlet. The air duct switching plate forms part of the air duct wall and is movably disposed on the casing to have a first working position and a second working position. In the first working position, the air inlet section is connected to the first air outlet section, and in the second working position, the air inlet section is connected to the second air outlet section. In this invention, the air duct configuration is switched by the movement of the air duct switching plate, so that in cooling mode, the indoor air conditioning unit delivers air from the upper first air outlet, and in heating mode, the indoor air conditioning unit delivers air from the lower second air outlet, achieving upward airflow for heating and downward airflow for cooling, resulting in a comfortable user experience.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and more particularly to an indoor air conditioning unit and an air conditioner. Background Technology

[0002] In existing air conditioners, indoor heat exchange air is delivered from the same vent in both cooling and heating modes. The airflow direction is adjusted only by a deflector located at the vent; however, the deflector's ability to adjust airflow is limited. For example, in cooling mode, the deflector is typically horizontal to prevent cold air from blowing directly into people, resulting in a reduced vent width, significant airflow reduction, and a shorter delivery distance. In heating mode, the deflector points downwards, and its airflow direction differs considerably from the airflow direction at the vent itself. This fails to effectively suppress airflow, causing hot air to rise quickly after traveling a distance from the deflector, leading to severe room temperature stratification and reduced comfort. Summary of the Invention

[0003] The main objective of this invention is to provide an air conditioning indoor unit and air conditioner with a more reasonable air supply method and a more comfortable user experience.

[0004] To achieve the above objectives, the present invention provides an indoor air conditioning unit, comprising:

[0005] The housing has an air duct, an air inlet communicating with the air duct, a first air outlet, and a second air outlet located below the first air outlet. The air duct includes an air inlet section adjacent to the air inlet, a first air outlet section adjacent to the first air outlet, and a second air outlet section adjacent to the second air outlet; and...

[0006] A duct switching plate forms part of the duct wall. The duct switching plate is movably disposed on the housing to have a first working position and a second working position. In the first working position, the air inlet section is connected to the first air outlet section. In the second working position, the air inlet section is connected to the second air outlet section.

[0007] In one embodiment, the indoor unit of the air conditioner further includes a bidirectional fan wheel disposed in the air duct.

[0008] In one embodiment, the air inlet is located between the first air outlet and the second air outlet in the vertical direction.

[0009] In one embodiment, the bidirectional impeller is a cross-flow impeller, and the air duct switching plate is located on the side of the cross-flow impeller facing away from the air inlet, and is arranged in an arc-shaped plate that bends away from the cross-flow impeller.

[0010] In one embodiment, the air duct switching plate is rotatably mounted on the housing, and the rotation axis of the air duct switching plate is arranged side by side with the rotation axis of the cross-flow fan. The air duct switching plate has a first rotating end and a second rotating end arranged opposite to each other on both sides of the rotation axis. The first rotating end is close to the first air outlet section, and the second rotating end is close to the second air outlet section.

[0011] When the air duct switching plate is in the first working position, the first rotating end is away from the cross-flow fan wheel, and the second rotating end is close to the cross-flow fan wheel. When the air duct switching plate is in the second working position, the first rotating end is close to the cross-flow fan wheel, and the second rotating end is away from the cross-flow fan wheel.

[0012] In one embodiment, along the axial direction of the cross-flow impeller, the plate length between the first rotating end and the rotating shaft is s1, and the plate length between the second rotating end and the rotating shaft is s2, where s1 / s2 is greater than or equal to 0.9 and less than or equal to 1.1.

[0013] In one embodiment, in the axial direction of the cross-flow fan, the angle between the line connecting the rotating shaft and the horizontal direction is greater than 0 degrees and less than 45 degrees.

[0014] In one embodiment, the duct wall of the first air outlet section includes a first air outlet bottom shell extending from the first air outlet toward the duct switching plate, and the duct wall of the second air outlet section includes a second air outlet bottom shell extending from the second air outlet toward the duct switching plate.

[0015] When the air duct switching plate is in the first working position, the first rotating end overlaps with the bottom shell of the first air duct; when the air duct switching plate is in the second working position, the second rotating end overlaps with the bottom shell of the second air duct.

[0016] In one embodiment, the housing has a mounting side and a front side located in front of the mounting side, the first air outlet bottom shell is inclined forward and upward, and the second air outlet bottom shell is inclined forward and downward.

[0017] In one embodiment, the first air outlet bottom shell has a first air guide section adjacent to the first air outlet, the first air guide section forming an angle greater than or equal to 0 degrees and less than or equal to 60 degrees with the horizontal direction; and / or,

[0018] The second air outlet bottom shell has a second air guide section adjacent to the second air outlet, and the angle between the second air outlet section and the horizontal direction is greater than or equal to 45 degrees and less than or equal to 90 degrees.

[0019] In one embodiment, the first air outlet bottom shell has a first air guide section adjacent to the first air outlet, the first air guide section forming an angle greater than or equal to 10 degrees and less than or equal to 20 degrees with the horizontal direction; and / or,

[0020] The second air outlet bottom shell has a second air guide section adjacent to the second air outlet, and the angle between the second air outlet section and the horizontal direction is greater than or equal to 80 degrees and less than or equal to 90 degrees.

[0021] In one embodiment, the air inlet section includes a first volute and a second volute, which are spaced apart in the vertical direction. The first volute extends from the upper part of the air inlet toward the cross-flow impeller, and the second volute extends from the lower part of the air inlet toward the cross-flow impeller.

[0022] In one embodiment, when the air duct switching plate is in the first working position, the cross-flow impeller air inlet angle formed between the second end and the first volute tongue is greater than or equal to 150 degrees and less than or equal to 180 degrees.

[0023] When the air duct switching plate is in the second working position, the cross-flow fan inlet angle formed between the first end and the second volute tongue is greater than or equal to 150 degrees and less than or equal to 180 degrees.

[0024] In one embodiment, the housing has a mounting side and a front side located in front of the mounting side, and the air inlet is located on the front side of the housing and is positioned between the first air outlet and the second air outlet in the vertical direction.

[0025] In one embodiment, the front side of the housing is provided with a panel extending in the vertical direction. The panel is closable at the air inlet. When the panel is open, it has a first open position in which the upper end of the panel is rotatably connected to the housing and the lower end of the panel is separated from the housing, and a second open position in which the lower end of the panel is rotatably connected to the housing and the upper end of the panel is separated from the housing.

[0026] In one embodiment, the housing is further provided with a first cover plate and a second cover plate, the first cover plate being closable at the first air outlet and the second cover plate being closable at the second air outlet.

[0027] In one embodiment, the housing has a mounting side and a front side located in front of the mounting side, the first cover plate extends forward and upward from the first air outlet when the first air outlet is opened, and the second cover plate extends forward and downward from the second air outlet when the second air outlet is opened.

[0028] To achieve the above objectives, the present invention also proposes an air conditioner, including the air conditioner indoor unit as described above.

[0029] In this invention, the indoor unit of an air conditioner includes a casing and an air duct switching plate. The casing forms an air duct, an air inlet, a first air outlet, and a second air outlet located above the first air outlet. The air duct includes an air inlet section adjacent to the air inlet, a first air outlet section adjacent to the first air outlet, and a second air outlet section adjacent to the second air outlet. The air duct switching plate constitutes part of the air duct wall. The air duct switching plate is movably disposed on the casing to have a first working position and a second working position. In the first working position, the air inlet section is connected to the first air outlet section, and in the second working position, the air inlet section is connected to the second air outlet section. In this invention, the air duct configuration is switched by the movement of the air duct switching plate, so that in cooling mode, the indoor unit of the air conditioner delivers air from the first air outlet above, and in heating mode, the indoor unit of the air conditioner delivers air from the second air outlet below. This achieves upward airflow for heating and downward airflow for cooling, ensuring that neither hot nor cold air blows directly on the human body. Furthermore, the air delivery distance is long, the airflow circulation range in the room is large, and the temperature distribution is uniform, making the user's experience more comfortable. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the air outlet of an indoor air conditioner in cooling mode in the prior art;

[0031] Figure 2 This is a schematic diagram of the air outlet of an indoor air conditioner in heating mode in the prior art;

[0032] Figure 3 This is a schematic diagram of the structure of an embodiment of the air conditioner indoor unit provided by the present invention in the off state;

[0033] Figure 4 for Figure 3 A schematic diagram of the air outlet of an indoor air conditioner in cooling mode;

[0034] Figure 5 for Figure 3 A schematic diagram of the air outlet of an indoor air conditioner in heating mode;

[0035] Figure 6 for Figure 3 Schematic diagram of the working position of the stroke channel switching plate;

[0036] Figure 7 for Figure 3 Front view of the central cross-flow wind turbine;

[0037] Figure 8 for Figure 7 Sectional view at point AA;

[0038] Figure 9 for Figure 7 Sectional view at point BB;

[0039] Figure 10 This is a schematic diagram of the heat exchange airflow distribution of an indoor air conditioning unit in cooling mode in the prior art;

[0040] Figure 11 This is a schematic diagram of the heat exchange airflow distribution of an indoor air conditioning unit in heating mode in the prior art;

[0041] Figure 12 A schematic diagram of the heat exchange airflow distribution in cooling mode of an embodiment of an air conditioner indoor unit provided by the present invention;

[0042] Figure 13 This is a schematic diagram of the heat exchange airflow distribution in heating mode of an embodiment of an air conditioner indoor unit provided by the present invention.

[0043] Explanation of icon numbers:

[0044] label name label name 100’ air conditioner indoor unit 101 First air outlet bottom shell 10’ air guide plate 102 Second air outlet bottom shell 11’ air inlet 103 First cochlear tongue 12’ air vent 104 Second cochlear tongue 20’ heat exchanger 20 Air duct switching board 30’ Crossflow wind turbine 21 Rotating shaft 100 air conditioner indoor unit 22 First rotating end 60 Installation side 23 Second rotating end 10 chassis 30 Crossflow wind turbine 11 First air outlet 31 pivot 12 Second air outlet 32 First blade section 13 air inlet 33 Second blade section 14 Air duct 40 panel 140 Air intake section 51 First cover plate 141 First air outlet section 52 Second cover plate 142 Second air outlet section 50 heat exchanger

[0045] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0047] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0048] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0049] In a conventional 100' air conditioner indoor unit, please refer to Figure 1 and Figure 2 The indoor unit 100' of the air conditioner has only one air outlet. Taking the wall-mounted indoor unit 100' as an example, the indoor unit 100' has an air inlet 11' and an air outlet 12', as well as a heat exchange duct connecting the air inlet 11' and the air outlet 12'. The heat exchange duct is equipped with a heat exchanger 20' and a cross-flow fan 30'. Whether in cooling mode or heating mode, indoor air flows in from the air inlet 11' on the upper side of the indoor unit 100' and from the air outlet 12' on the lower side. The air outlet direction is adjusted only by the air guide plate 10' located at the air outlet.

[0050] However, the airflow direction adjustment capability of the air deflector 10' is limited. For example, in cooling mode, please refer to... Figure 1 The air guide plate 10' is generally positioned horizontally, allowing the low-temperature airflow to be delivered roughly horizontally, preventing cold air from blowing directly into people. However, due to the placement of the air guide plate 10', the width of the air outlet 12' is reduced, resulting in significant airflow attenuation and a shorter air delivery distance. At this time, the indoor heat exchange airflow circulation effect is as follows: Figure 10 As shown in the figure, the outer box represents the room boundary. The indoor unit 100' of the air conditioner is installed on the upper part of one side wall of the room. The heat exchange airflow sent out from the air outlet 12' has a small air delivery distance. After being sent out, it is easy to be re-inhaled into the heat exchange air duct, causing airflow short circuit. Some of the heat exchange airflow only circulates in a small area in the upper part of the room and cannot diffuse to the entire room, affecting the overall cooling of the room and causing uneven temperature distribution inside the room.

[0051] In heating mode, please refer to Figure 2 The air guide plate 10' is generally adjusted to extend downwards. However, due to the internal air duct structure of the indoor unit 100', the actual air outlet 12' generally has a small angle with the horizontal direction. This means the air guide direction of the air guide plate 10' differs significantly from the airflow direction of the outlet 12' itself. Therefore, it cannot push the hot air downwards. Furthermore, the extension length of the air guide plate 10' is limited, causing the hot air to quickly rise after traveling a certain distance from the air guide plate 10'. At this time, the indoor heat exchange airflow circulation effect is as follows: Figure 11 As shown in the diagram, the outer box represents the room boundary. The indoor unit 100' of the air conditioner is installed on the upper part of one side wall of the room. The heat exchange airflow sent out from the air outlet 12' rises quickly after being sent out and returns to the upper air inlet 11', where it is drawn into the heat exchange air duct. This causes some of the heat exchange airflow to circulate only in a small area at the top of the room and cannot diffuse to the entire room. As a result, the heat stratification phenomenon inside the room is obvious, and people feel hot in the head and cold in the feet, making the user experience uncomfortable.

[0052] To address the aforementioned problems, this invention provides an indoor air conditioning unit 100 and an air conditioner including the indoor air conditioning unit 100. The air conditioner can be an integrated air conditioner or a split-type air conditioner. A split-type air conditioner includes an outdoor air conditioning unit and the indoor air conditioning unit 100 provided by this invention. The indoor air conditioning unit 100 is connected to the outdoor air conditioning unit via a refrigerant pipe, and the indoor air conditioning unit 100 performs heat exchange and air delivery indoors. An integrated air conditioner includes the indoor air conditioning unit 100 provided by this invention. The indoor air conditioning unit 100 performs indoor heat exchange and air delivery, and the air conditioner also includes an outdoor heat exchange structure integrally formed with the indoor air conditioning unit 100.

[0053] Figures 3 to 5 This diagram illustrates the structure of an embodiment of the air conditioner indoor unit 100 provided by the present invention. It should be noted that the descriptions of orientation and direction in this embodiment apply only to the state of the air conditioner indoor unit 100 and the air conditioner during normal use, and do not include the state of the air conditioner indoor unit 100 and the air conditioner during installation, transportation, etc. In this embodiment, the up-down direction refers to a direction approximately parallel to the direction of gravity, but with an angle not exceeding 90 degrees; the horizontal direction refers to a direction perpendicular to gravity; and the front-back direction refers to a direction approximately parallel to the horizontal direction, but with a certain angle between it and the horizontal direction, and the angle not exceeding 90 degrees.

[0054] In this embodiment, the indoor unit 100 of the air conditioner includes a housing 10 and an air duct switching plate 20. The housing 10 forms an air duct 14, an air inlet 13, a first air outlet 11, and a second air outlet 12. The air inlet 13, the first air outlet 11, and the second air outlet 12 are separated and connected to the air duct 14, including the air inlet 13, the first air outlet 11, and the second air outlet 12 located below the first air outlet 11. The air duct 14 includes an air inlet section 140 adjacent to the air inlet 13, a first air outlet section 141 adjacent to the first air outlet 11, and a second air outlet section 142 adjacent to the second air outlet 12. The air duct switching plate 20 constitutes part of the air duct wall of the air duct 14. The air duct switching plate 20 is movably disposed on the housing 10 to have a first working position and a second working position. In the first working position, the air inlet section 140 is connected to the first air outlet section 141. In the second working position, the air inlet section 140 is connected to the second air outlet section 142.

[0055] In this embodiment, the specific material and shape of the housing 10 are not limited. Specifically, the housing 10 is generally made of engineering plastic to protect components such as the fan and heat exchanger 50 in the indoor air conditioning unit 100 and to support the indoor air conditioning unit 100. The specific shape of the housing 10 is set according to the specific type of the indoor air conditioning unit 100 and the distribution of its internal components. Taking a cabinet-type indoor air conditioning unit 100 as an example, the housing 10 is generally cylindrical in the vertical direction, and the indoor air conditioning unit 100 is supported on the ground by a chassis located at the bottom of the housing 10. In this embodiment, the indoor air conditioning unit 100 is a wall-mounted indoor air conditioning unit 100. The housing 10 extends approximately horizontally, and the rear side of the housing 10 serves as the mounting side 60 for installation and fixation to a wall or other building structure to support the indoor air conditioning unit 100.

[0056] Furthermore, the air duct 14 is formed within the housing 10, and the air duct 14 is used for heat exchange. The air duct 14 refers to a channel for the flow of heat exchange air, and the air duct 14 has an air duct wall that surrounds the air duct 14. The air duct wall can be integrally formed with the housing 10 or separately formed from the housing 10, and can be composed of multiple separate sections. It is understood that a fan and a heat exchanger 50 should be provided within the air duct 14. The fan is used to drive indoor air to flow into the air duct 14 from the air inlet 13 and flow along the air duct 14 into the room. The heat exchanger 50 is used to exchange heat with the flowing air. The heat exchanger 50 can be set as an evaporator or a condenser according to the heat exchange mode of the indoor unit 100 of the air conditioner. The specific structure of the fan and the heat exchanger 50 and their placement in the air duct 14 are not limited. The specific structure and shape of the air duct 14 are not limited. The air duct 14 includes an air inlet section 140 adjacent to the air inlet 13, a first air outlet section 141 adjacent to the first air outlet 11, and a second air outlet section 142 adjacent to the second air outlet 12. The air inlet section 140 is specifically located on the air outlet side of the air inlet 13 and is arranged adjacent to the air inlet 13. The first air outlet section 141 is specifically located on the air inlet side of the first air outlet 11 and is arranged adjacent to the first air outlet 11. The second air outlet section 142 is specifically located on the air inlet side of the second air outlet 12 and is arranged adjacent to the second air outlet 12.

[0057] Figure 3The diagram shows the structure of the indoor unit 100 of the air conditioner in the off state. As shown, the air duct switching plate 20 is movably disposed on the housing 10 to have a first working position and a second working position, thereby switching the shape of the air duct 14. In the first working position, the air inlet section 140 is connected to the first air outlet section 141, and in the second working position, the air inlet section 140 is connected to the second air outlet section 142. In this embodiment, the first air outlet 11 is located above the second air outlet 12, and the internal shape of the air duct 14 is adjusted by the movement of the air duct switching plate 20, no longer relying on or only relying on the air guide plate to adjust the airflow direction.

[0058] Thus, when the indoor unit 100 of the air conditioner is in cooling mode, please refer to... Figure 4 The air inlet section 140 is connected to the first air outlet section 141. When the fan is working, the driven airflow flows from the air inlet 13 into the air duct 14, is cooled by the heat exchanger 50, and is then sent out from the first air outlet 11 located above. At this time, the indoor heat exchange airflow circulation effect is as follows: Figure 12 As shown in the diagram, the outer frame represents the room boundary. The indoor air conditioner unit 100 is installed on the upper part of one side wall of the room. Because the shape of the air duct 14 matches the orientation of the first air outlet 11, the heat exchange airflow delivered from the air outlet is basically delivered horizontally forward, preventing the cold air from blowing directly on the human body. Furthermore, the first air outlet 11 is not obstructed by the air guide plate, thus allowing for a longer air delivery distance. This enables the heat exchange airflow to circulate over a wider area, improving its distribution within the room, resulting in a more uniform temperature distribution and greater comfort for the human body.

[0059] When the indoor unit 100 of the air conditioner is in heating mode, please refer to... Figure 5 The air inlet section 140 is connected to the second air outlet section 142. When the fan is working, the driven airflow flows from the air inlet 13 into the air duct 14, is cooled by the heat exchanger 50, and is then sent out from the lower second air outlet 12. At this time, the indoor heat exchange airflow circulation effect is as follows: Figure 13 As shown in the diagram, the outer frame represents the room boundary. The indoor unit 100 of the air conditioner is installed on the upper part of one side wall of the room. The heat exchange airflow delivered from the second air outlet 12 is directed downwards because the shape of the air duct 14 is adapted to the orientation of the second air outlet 12. The direction of the heat exchange airflow no longer relies solely on the guidance of the air guide plate, but is adjusted by the shape of the air duct 14 itself. The air delivery distance is longer, and the hot air does not rise quickly after being delivered, but first diffuses downwards to the bottom of the room before rising, resulting in a wider diffusion range. This improves the heat stratification phenomenon inside the room and makes people feel more comfortable.

[0060] In one embodiment, the fan includes a bidirectional impeller. In this embodiment, the bidirectional impeller rotates in the forward direction around the shaft 31 and in the reverse direction around the shaft 31. By adjusting the rotation direction of the bidirectional impeller, the positions of the air inlet and air outlet sides of the bidirectional impeller can be interchanged. Thus, when the bidirectional impeller rotates forward, the first air outlet section 141 is on the air outlet side of the bidirectional impeller, and the second air outlet section 142 and the air inlet 13 are on the air inlet side of the bidirectional impeller. When the air conditioner is in cooling mode, it controls the bidirectional impeller to rotate forward, so that the low-temperature airflow is sent out from the first air outlet 11 located above. Then, the cold air sinks, and the cold air does not blow directly on the human body, resulting in a uniform indoor temperature distribution and a comfortable feeling for the human body. When the bidirectional fan reverses, the second air outlet 12 is on the air outlet side of the bidirectional fan, and the first air outlet 11 and the air inlet 13 are on the air inlet side of the bidirectional fan. When the air conditioner is in heating mode, it controls the bidirectional fan to reverse, so that the high-temperature airflow is sent out from the second air outlet 12 located below, and then the hot air rises and does not float in the upper part of the room, avoiding the phenomenon of heat stratification, so that the indoor temperature is evenly distributed and the human body feels comfortable.

[0061] The specific model of the bidirectional wind turbine is not limited, as long as it can drive airflow from different directions in both forward and reverse rotation. For example, it can be an axial flow wind turbine or a cross-flow wind turbine 30. When the bidirectional wind turbine is a cross-flow wind turbine 30, the blades of the cross-flow wind turbine 30 need to be specially designed; for details, please refer to [link to relevant documentation]. Figures 7 to 9 In one embodiment, the cross-flow impeller 30 has a first blade section 32 and a second blade section 33 alternately distributed in the axial direction. The first blade section 32 and the second blade section 33 have different blade shapes, such that when the cross-flow impeller 30 rotates clockwise, the airflow driven by the cross-flow impeller 30 is delivered radially from the first blade section 32, and when the cross-flow impeller 30 rotates counterclockwise, the airflow driven by the cross-flow impeller 30 is delivered radially from the second blade section 33. For the specific blade shapes of the first blade section 32 and the second blade section 33, please refer to... Figure 8 and Figure 9It can be seen that the blade profile of the first blade section 32 has the same rotation direction as the forward rotation direction, and the blade profile of the second blade section 33 has the same rotation direction as the reverse rotation direction. Thus, the cross-flow impeller 30 provided in this embodiment can achieve different airflow directions in the forward and reverse rotation states of the bidirectional impeller. It is understood that the specific structure of the cross-flow impeller 30 can also have other implementations. For example, the cross-flow impeller 30 can be equipped with movable blades and a blade driving device to drive the blades. The position of the blades can be adjusted according to the rotation direction of the cross-flow impeller 30. Specifically, the blade driving device is used to adaptively drive and adjust the blades, so that the blades move to a position with the same rotation direction as the current rotation direction. Thus, the cross-flow impeller 30 provided in this embodiment can achieve different airflow directions in the forward and reverse rotation states of the bidirectional impeller.

[0062] In one embodiment, please refer to Figures 3 to 5 The air inlet 13 is located vertically between the first air outlet 11 and the second air outlet 12. This arrangement ensures a reasonable air outlet layout. When the indoor unit 100 is running, the indoor airflow returns from the air inlet 13 located in the middle of the casing 10, and then, depending on the cooling or heating mode and the corresponding working position of the air duct switching plate 20, is guided to the first air outlet section 141 or the second air outlet section 142, and delivered from the first air outlet 11 located above or the second air outlet 12 located below. The internal components of the indoor unit 100 are correspondingly arranged, resulting in a more compact structure and a more aesthetically pleasing appearance.

[0063] In one embodiment, please refer to Figure 3 The bidirectional impeller is a cross-flow impeller 30, and the duct switching plate 20 is located on the side of the cross-flow impeller 30 facing away from the air inlet 13, and is arranged in an arc-shaped plate that curves away from the cross-flow impeller 30. In this embodiment, the duct switching plate 20 is curved to conform to the shape of a conventional cross-flow duct 14. The duct switching plate 20 cooperates with the duct wall at the air inlet section 140 and the first air outlet section 141 or the second air outlet section 142 to jointly form a cross-flow duct 14 with a shape suitable for the cross-flow impeller 30, guiding the airflow from the air inlet 13 to the first air outlet 11 or the second air outlet 12, reducing wind resistance and increasing the air volume. Preferably, the heat exchanger 50 is also arranged in an arc-shaped plate that curves towards the air inlet 13. This increases the heat exchange area of ​​the heat exchanger 50 and improves the heat exchange efficiency.

[0064] In one embodiment, please refer to Figure 3 and Figure 6The dashed line in the figure indicates the shape of the air duct switching plate 20 in the first working position, and the solid line indicates the shape of the air duct switching plate 20 in the second working position. The air duct switching plate 20 is rotatably mounted on the housing 10, and the rotation shaft 21 of the air duct switching plate 20 is arranged side by side with the rotation shaft 31 of the cross-flow fan 30. The air duct switching plate 20 has a first rotating end 22 and a second rotating end 23 arranged opposite to each other on both sides of the rotation shaft 21. The first rotating end 22 is close to the first air outlet section 141, and the second rotating end 23 is close to the second air outlet section 142.

[0065] Please see Figure 4 In cooling mode, the air duct switching plate 20 switches to the first working position, with the first rotating end 22 moving away from the cross-flow fan 30 and the second rotating end 23 moving closer to the cross-flow fan 30. This increases the air inlet of the first air outlet section 141 and decreases the air inlet of the second air outlet section 142, connecting the air inlet section 140 and the first air outlet section 141 to form an upper air outlet duct 14. Thus, when the cross-flow fan 30 is working, the indoor airflow passes through the air inlet 13, undergoes heat exchange and cooling via the heat exchanger 50, flows to the first air outlet section 141, and is discharged from the upper first air outlet 11. The low-temperature gas sinks, preventing the cold air from blowing directly onto the human body, resulting in a uniform indoor temperature distribution and comfortable comfort. Please refer to [link / reference]. Figure 5 In heating mode, the air duct switching plate 20 switches to the second working position, with the second rotating end 23 moving away from the cross-flow fan 30 and the first rotating end 22 moving closer to the cross-flow fan 30. This reduces the air inlet of the first air outlet section 141 and increases the air inlet of the second air outlet section 142, connecting the air inlet section 140 and the second air outlet section 142 to form a lower air outlet duct 14. Thus, when the cross-flow fan 30 is working, the indoor airflow passes through the air inlet 13, undergoes heat exchange and heating via the heat exchanger 50, flows to the second air outlet section 142, and is discharged from the lower second air outlet 12. The rising of hot air avoids stratification during heating, resulting in a uniform indoor temperature distribution and comfortable comfort for the human body.

[0066] In this embodiment, the air duct switching plate 20 switches between the first working position and the second working position through a seesaw-like rotation action. The movement path is simple and the stroke is small. The structure is simple and reliable, easy to manufacture and assemble, and has low production cost.

[0067] Based on the previous embodiment, please refer to Figure 6As shown in the figure, along the axial direction of the cross-flow fan 30, the plate length between the first rotating end 22 and the rotating shaft 21 is s1, and the plate length between the second rotating end 23 and the rotating shaft 21 is s2. The ratio of s1 / s2 is greater than or equal to 0.9 and less than or equal to 1.1. That is, the plate lengths between the first rotating end 22 and the rotating shaft 21 and the second rotating end 23 and the rotating shaft 21 are preferably substantially the same. This allows the air duct switching plate 20 to rotate substantially around its axis of symmetry, providing greater room for movement and preventing it from being unable to rotate due to interference on one side. Furthermore, the shapes of the upper and lower air outlet ducts 14 formed by the air duct switching plate 20 are also substantially symmetrical, meeting the airflow requirements in cooling or heating modes.

[0068] In one embodiment, please refer to Figure 3 In the axial direction of the cross-flow fan 30, the angle C between the line connecting the rotating shaft 21 and the horizontal direction is greater than 0 degrees and less than 45 degrees. This arrangement determines the positional relationship between the air duct switching plate 20 and the cross-flow fan 30. The air inlet 13 and the air duct switching plate 20 are arranged opposite each other on both sides of the cross-flow fan 30, so that the air inlet 13 is approximately located at the front of the housing 10, and the air duct switching plate 20 is approximately located at the rear and slightly above the cross-flow fan 30. The structural arrangement is reasonable, allowing the air duct switching plate 20 sufficient space to move, which is suitable for the internal component arrangement and shape requirements of a typical wall-mounted air conditioner indoor unit 100, making the overall structure of the air conditioner indoor unit 100 more compact and smaller in size.

[0069] Based on the above embodiments, please continue to refer to sections 3 to 4. Figure 5The duct wall of the first air outlet section 141 includes a first air outlet base shell 101 extending from the first air outlet 11 towards the duct switching plate 20, and the duct wall of the second air outlet section 142 includes a second air outlet base shell 102 extending from the second air outlet 12 towards the duct switching plate 20. It can be understood that the extension direction of the duct wall is roughly as described above, and does not mean that the duct wall extends directly along the line connecting the first air outlet and the duct switching plate 20. The first air outlet base shell 101 and the second air outlet base shell 102 can also be integrally formed with the housing 10. This configuration allows the duct switching plate 20 to meet the length requirements of the duct 14 itself without requiring a large size. It avoids an increase in the overall size of the air conditioner indoor unit 100 due to an excessively large duct switching plate 20, which would increase the required space for movement. In this embodiment, the first air outlet bottom shell 101 and the second air outlet bottom shell 102 compensate for the insufficient size of the air duct switching plate 20 itself, thereby enabling the air duct switching plate 20 to be designed to be smaller, reducing the required space for movement, and allowing the overall structure of the air conditioner indoor unit 100 to be set to be more compact, smaller in size, more aesthetically pleasing, and reducing production costs.

[0070] In this embodiment, when the air duct switching plate 20 is in the first working position, the first rotating end 22 overlaps with the first air outlet bottom shell 101; when the air duct switching plate 20 is in the second working position, the second rotating end 23 overlaps with the second air outlet bottom shell 102. In cooling mode, the air duct switching plate 20 switches to the first working position, and the first end overlaps with the first air outlet bottom shell 101. The air duct switching plate 20 and the first air outlet bottom shell 101 together form the air duct wall of the upwardly curved and extended upper air outlet air duct 14, which guides the airflow flowing in from the air inlet 13 to the first air outlet 11. The shape of the air duct 14 is adapted to the orientation of the first air outlet 11, so that the airflow is basically sent forward horizontally, and the cold air does not blow directly on the human body. Furthermore, the first air outlet 11 is not blocked by the air guide plate, so the air delivery distance is longer, allowing the heat exchange airflow to circulate over a larger range, improving the distribution in the room, making the room temperature distribution more uniform, and making the human body feel more comfortable. In heating mode, the air duct switching plate 20 switches to the second working position, and the second end overlaps with the second air outlet bottom shell 102. The air duct switching plate 20 and the second air outlet bottom shell 102 together form the air duct wall of the downwardly curved and extended lower air outlet air duct 14, which guides the airflow flowing in from the air inlet 13 to the second air outlet 12 for discharge. Since the shape of the air duct 14 is adapted to the orientation of the second air outlet 12, the airflow is basically discharged downward. The direction of the heat exchange airflow no longer relies solely on the guidance adjustment of the air guide plate, but is adjusted by the shape of the air duct 14 itself. The air delivery distance is longer, and the hot air does not rise quickly after being discharged, but first diffuses downward to the bottom of the room before rising, resulting in a wider diffusion range, improving the heating stratification phenomenon inside the room, and making the human body feel more comfortable.

[0071] Preferably, the housing 10 has a mounting side 60 and a front side located in front of the mounting side 60. The first air outlet bottom shell 101 is inclined forward and upward, and the second air outlet bottom shell 102 is inclined forward and downward. This ensures that in cooling mode, when airflow is delivered from the first air outlet 11 to the room, it is guided by the first air outlet bottom shell 101 and delivered in a forward and upward direction, resulting in a longer air delivery distance and reducing airflow short-circuiting. In heating mode, when airflow is delivered from the second air outlet 12 to the room, it is guided by the second air outlet bottom shell 102 and delivered downward to the bottom of the room, preventing hot air from rising quickly and improving heating stratification.

[0072] Specifically, please refer to Figure 4The first air outlet bottom shell 101 has a first air guide section adjacent to the first air outlet 11. The first air guide section forms an angle B with the horizontal direction. It can be understood that when the first air guide section extends in a straight line, the angle B with the horizontal direction is the angle between the first air guide section and the horizontal plane; when the first air guide section extends in an arc, the angle B with the horizontal direction is the tangent angle between the first air guide section and the horizontal plane. The angle B is greater than or equal to 0 degrees and less than or equal to 60 degrees. Preferably, the angle B is greater than or equal to 10 degrees and less than or equal to 20 degrees, and most preferably around 15 degrees. In this embodiment, the smaller the value of the angle B, the closer the direction of the heat exchange airflow is to the horizontal direction in cooling mode, making it easier for cold air to adhere to the wall, achieving a rain-like cooling effect, and the heat exchange airflow circulation in cooling mode is closer to... Figure 12 As shown, the airflow travels along the top of the room to the far end, then flows along the top of the room, slowly sinks to the ground when it reaches the opposite wall, and finally enters from the bottom of the air conditioner, completing a large airflow cycle. This not only prevents cold air from blowing in, but also circulates the heat exchange air throughout the room, resulting in better room temperature uniformity and greatly improving comfort.

[0073] In one embodiment, please refer to Figure 5 The second air outlet bottom shell 102 has a second air guide section adjacent to the second air outlet 12. The second air outlet section 142 forms an angle A with the horizontal direction. It can be understood that when the second air guide section extends in a straight line, the angle A with the horizontal direction is the angle between the second air guide section and the horizontal plane; when the second air guide section extends in an arc, the angle A with the horizontal direction is the tangent angle between the second air guide section and the horizontal plane. The angle A is greater than or equal to 45 degrees and less than or equal to 90 degrees. Preferably, the angle B is greater than or equal to 80 degrees and less than or equal to 90 degrees, and most preferably around 15 degrees. In this embodiment, the larger the value of the angle A, the closer the heat exchange airflow direction is to the vertical direction, the easier it is for hot air to be delivered downwards, and the more effectively it achieves a carpet-like heating effect. The heat exchange airflow circulation in the heating mode is closer to... Figure 13 As shown, the heat exchange airflow is vertically delivered to the floor along the wall, then flows along the floor, slowly rises to the top of the room when it reaches the opposite wall, and is finally drawn into the air conditioner from the top of the room, completing a large circulation of heat exchange airflow. This not only prevents the hot air from not sinking, resulting in a hot head and cold feet, but also circulates the heat exchange airflow throughout the room, resulting in better room temperature uniformity, reducing heat stratification, effectively increasing foot temperature, and greatly improving comfort.

[0074] In one embodiment, please refer to Figure 3The air inlet section 140 includes a first volute 103 and a second volute 104 in its duct wall. The first volute 103 and the second volute 104 are spaced apart in the vertical direction. The first volute 103 extends from the upper part of the air inlet 13 towards the cross-flow impeller 30, and the second volute 104 extends from the lower part of the air inlet 13 towards the cross-flow impeller 30. In this embodiment, the first volute 103 may also constitute part of the air duct wall of the first air outlet section 141, and the second volute 104 may also constitute part of the air duct wall of the second air outlet section 142. The air inlet section 140 is formed between the first volute 103 and the second volute 104, providing sufficient air inlet area and internal space for the heat exchanger 50. Preferably, the upper and lower ends of the heat exchanger 50 are respectively fixed to the first volute 103 and the second volute 104, and are arranged in a forward-curved arc-shaped plate, giving the casing 10 a forward-curved appearance, resulting in a compact structure and aesthetically pleasing design. Preferably, the lower end of the second volute 104 has a forward-extending water collection tray, located below the arc-shaped heat exchanger 50 for collecting water.

[0075] Based on the previous embodiment, it can be understood that in cooling mode, when the air duct switching plate 20 is located in the first working position, an upward air outlet duct 14 is formed inside the housing 10. At this time, the distance between the second end of the air duct switching plate 20 and the first volute tongue 103 determines the size of the air inlet area of ​​the upward air outlet duct 14. If the distance between the second end and the first volute tongue 103 is too small, the air inlet area of ​​the upward air outlet duct 14 will be too small, and the wind resistance will increase. Conversely, if the distance between the second end and the first volute tongue 103 is too large, the air duct switching plate 20 and the first volute tongue 103 will have insufficient guiding effect. Therefore, according to the general cross-flow duct 14 shape design, please refer to... Figure 4 When the air duct switching plate 20 is in the first working position, the inlet angle D of the cross-flow impeller 30 formed between the second end and the first volute tongue 103 is greater than or equal to 150 degrees and less than or equal to 180 degrees. In this embodiment, the specific definition of the inlet angle D of the cross-flow impeller 30 formed between the second end and the first volute tongue 103 is as follows: Please refer to... Figure 4On the cross-section of the cross-flow fan 30, a first line is drawn between the point closest to the second end of the cross-flow fan 30 and the rotating shaft 31. A second line is drawn between the point closest to the first volute 103 of the cross-flow fan 30 and the rotating shaft 31. The angle between the first line and the second line is the air intake angle D of the cross-flow fan 30 formed between the second end and the first volute 103. When the air intake angle D is within the range of greater than or equal to 150 degrees and less than or equal to 180 degrees, the air duct switching plate 20 and the first volute 103 can play a good guiding role, while ensuring the air intake area of ​​the upper air outlet duct 14, so that the air volume of the air conditioner indoor unit 100 is large.

[0076] Similarly, in heating mode, when the air duct switching plate 20 is in the second working position, a downward air outlet duct 14 is formed inside the housing 10. At this time, the distance between the first end of the air duct switching plate 20 and the second volute tongue 104 determines the size of the air inlet area of ​​the downward air outlet duct 14. If the distance between the first end and the second volute tongue 104 is too small, the air inlet area of ​​the downward air outlet duct 14 will be too small, increasing wind resistance. Conversely, if the distance between the first end and the second volute tongue 104 is too large, the air duct switching plate 20 and the second volute tongue 104 will have insufficient airflow guiding effect. Therefore, based on the general cross-flow duct 14 design, please refer to [reference needed]. Figure 5 When the air duct switching plate 20 is in the second working position, the inlet angle E of the cross-flow impeller 30 formed between the first end and the second volute tongue 104 is greater than or equal to 150 degrees and less than or equal to 180 degrees. In this embodiment, the specific definition of the inlet angle E of the cross-flow impeller 30 formed between the first end and the second volute tongue 104 is as follows: Please refer to... Figure 5 On the cross-section of the cross-flow fan 30, a third line is drawn between the point closest to the first end of the cross-flow fan 30 and the rotating shaft 31, and a fourth line is drawn between the point closest to the second volute tongue 104 of the cross-flow fan 30 and the rotating shaft 31. The angle between the third line and the fourth line is the air intake angle E of the cross-flow fan 30 formed between the first end and the second volute tongue 104. When the air intake angle E is within the range of greater than or equal to 150 degrees and less than or equal to 180 degrees, the air duct switching plate 20 and the second volute tongue 104 can play a good guiding role, while ensuring the air intake area of ​​the lower air outlet duct 14, so that the air volume of the air conditioner indoor unit 100 is large.

[0077] In one embodiment, please refer to section 3 to... Figure 5The housing 10 has a mounting side 60 and a front side located in front of the mounting side 60. The air inlet 13 is located on the front side of the housing 10 and is positioned vertically between the first air outlet 11 and the second air outlet 12. This arrangement makes the air outlets more reasonable. When the indoor unit 100 is running, the indoor airflow returns from the air inlet 13 located in the middle of the front side of the housing 10, and then, depending on the cooling or heating mode and the corresponding working position of the air duct switching plate 20, is guided to the first air outlet section 141 or the second air outlet section 142, and is delivered from the first air outlet 11 located above or the second air outlet 12 located below. The internal components of the indoor unit 100 are correspondingly arranged, resulting in a more compact structure and a more aesthetically pleasing appearance.

[0078] Based on the previous embodiment, please continue to refer to... Figures 3 to 5 The front side of the housing 10 is provided with a panel 40 extending vertically. The panel 40 is closable at the air inlet 13. In the open state, the panel 40 has a first open position where the upper end of the panel 40 is rotatably connected to the housing 10 and the lower end of the panel 40 is separated from the housing 10, and a second open position where the lower end of the panel 40 is rotatably connected to the housing 10 and the upper end of the panel 40 is separated from the housing 10. Figure 4 As shown, in the first open position, the panel 40 forms a lower air intake channel with an open bottom between the panel 40 and the air inlet 13. This allows airflow to flow from the gap between the panel 40 and the lower side of the housing 10, upwards towards the air inlet 13, and then towards the air intake section 140. The actual air intake position is far from the first air outlet 11, and the air intake direction is downwards to prevent the low-temperature airflow from the first air outlet 11 from directly flowing towards the air inlet 13, thus avoiding airflow short-circuiting. Figure 5 As shown, in the second open position, the panel 40 forms an upper air intake channel with an open top between the panel 40 and the air inlet 13. This allows airflow to flow from the gap between the panel 40 and the upper side of the housing 10, downwards towards the air inlet 13, and then towards the air intake section 140. The actual air intake position is far from the second air outlet 12, and the air intake direction is upwards, preventing the high-temperature airflow from the second air outlet from directly flowing towards the air inlet 13, thus avoiding airflow short-circuiting.

[0079] In this embodiment, when the indoor unit 100 of the air conditioner is in cooling mode, the air duct switching plate 20 switches to the first working position, forming an upper air outlet duct 14, and the panel 40 switches to the first open position. At this time, the indoor airflow flows from the lower side of the casing 10 along the gap formed between the casing 10 and the panel 40 from bottom to top to the air inlet section 140. After being cooled by heat exchanger 50, it is sent out from the first air outlet 11 through the upper air outlet duct 14. The first air outlet 11 is located at the top, and the extension direction of the first air outlet bottom shell 101 is forward and upward, so that the low-temperature airflow is sent forward and upward into the room, sinks in the room, and the cold air does not blow directly on the human body. The indoor air temperature distribution is uniform, and the human body feels comfortable. The indoor airflow enters from the lower side and exits from the upper side, with a large circulation range, good indoor air circulation, and uniform temperature distribution.

[0080] In heating mode, the air duct switching plate 20 of the indoor unit 100 switches to the second working position, forming a downward air outlet duct 14, and the panel 40 switches to the second open position. At this time, indoor airflow flows from the upper side of the casing 10 along the gap between the casing 10 and the panel 40 downwards to the air inlet section 140. After being heated by the heat exchanger 50, it is then discharged from the second air outlet 12 through the downward air outlet duct 14. The second air outlet 12 is located at the top, and the downward air outlet duct 14 extends downwards, allowing the high-temperature airflow to be directed downwards into the room. The air rises within the room, preventing the hot air from directly blowing onto the human body, thus avoiding heat stratification. This results in a uniform indoor air temperature distribution and comfortable comfort. The indoor airflow enters from the upper side and exits from the lower side, resulting in a large circulation range, good indoor air circulation, and uniform temperature distribution.

[0081] Preferably, the opening degree of the panel 40 in the first open position and the second open position is adjustable, specifically, this can be achieved by setting an adjustable hinge structure. In this embodiment, the air outlet speed of the indoor unit 100 can also be adjusted by adjusting the opening degree of the panel 40. It can be understood that the larger the opening degree of the panel 40, the larger the air intake at the air inlet 13, resulting in a larger actual heat exchange air volume of the indoor unit 100, and at the same time, the noise generated by the indoor unit 100 is also greater. Generally speaking, when the indoor unit 100 is first turned on, in order to achieve rapid cooling or heating, the panel 40 needs to be opened to the maximum opening degree. When the indoor temperature reaches or approaches the preset target temperature value, the opening degree of the panel 40 can be appropriately reduced to reduce noise. The appropriate opening degree of the panel 40 is selected based on factors such as maintaining a constant indoor temperature, energy saving, and indoor noise control.

[0082] In one embodiment, please refer to Figures 3 to 5The housing 10 is further provided with a first cover plate 51 and a second cover plate 52. The first cover plate 51 is closable at the first air outlet 11, and the second cover plate 52 is closable at the second air outlet 12. In this embodiment, by controlling the movement of the first cover plate 51 and the second cover plate 52, the opening and closing of the first air outlet 11 and the second air outlet 12 can be realized. Furthermore, by controlling the opening degree of the first cover plate 51 or the second cover plate 52, the air supply direction of the indoor unit 100 in cooling mode or heating mode can also be controlled.

[0083] Specifically, in cooling mode, please refer to Figure 4 When the air duct switching plate 20 is in the first working position, the first cover plate 51 opens the first air outlet 11, and the second cover plate 52 closes the second air outlet 12. Thus, in cooling mode, this prevents some airflow from entering or exiting the air duct 14 through the second air outlet 12, thus affecting the heat exchange airflow of the indoor unit 100. In heating mode, please refer to... Figure 5 When the air duct switching plate 20 is in the second working position, the first cover plate 51 closes the first air outlet 11, and the second cover plate 52 opens the second air outlet 12. Thus, in heating mode, this prevents some airflow from entering or exiting the air duct 14 from the first air outlet 11, thereby affecting the heat exchange airflow of the indoor unit 100.

[0084] In the previous embodiment, please refer to Figure 4 and Figure 5 The housing 10 has a mounting side 60 and a front side located in front of the mounting side 60. When the first air outlet 11 is opened, the first cover plate 51 extends forward and upward from the first air outlet 11. When the second air outlet 12 is opened, the second cover plate 52 extends forward and downward from the second air outlet 12. Thus, in cooling mode, when the first air outlet 11 is opened, the heat exchange airflow is guided forward and upward by the first cover plate 51, ensuring the airflow is delivered substantially horizontally. This prevents the cold air from blowing directly on the body, extends the airflow distance, and allows the heat exchange airflow to circulate over a wider area, improving the distribution of heat exchange airflow within the room, resulting in a more uniform temperature distribution and greater comfort for the human body.

[0085] When the second air outlet 12 is open in heating mode, the heat exchange airflow is guided downwards by the second cover plate 52, resulting in the airflow being primarily directed downwards. This allows the heat exchange airflow to travel a greater distance, and the hot air, after being delivered, does not rise quickly but first diffuses downwards to the bottom of the room before rising, resulting in a wider diffusion range. This improves the stratification of heating within the room, making the human body feel more comfortable.

[0086] The following comparison with existing air conditioner indoor units 100' illustrates the beneficial effects of the air conditioner indoor unit 100 and air conditioner provided by this invention. Please refer to the following references. Figures 10 to 13 In the diagram, the outer box represents the room boundary, and the arrows indicate the direction and range of the heat exchange airflow circulation. The indoor air conditioner unit 100 is a wall-mounted indoor air conditioner unit, which is installed on the upper part of one side wall of the room.

[0087] Figure 10 and Figure 11 The diagrams show the heat exchange airflow circulation in both cooling and heating modes of an embodiment of an air conditioner indoor unit 100' in the prior art. Figure 10 As shown, in cooling mode, the heat exchange airflow delivered from air outlet 12' has a short delivery distance and is easily re-drawn into the heat exchange duct after being delivered, causing airflow short-circuiting. Some of the heat exchange airflow only circulates within a small area at the top of the room and cannot diffuse throughout the entire room, affecting the overall cooling and resulting in uneven temperature distribution within the room. Figure 11 As shown, in heating mode, the heat exchange airflow sent from the air outlet 12' has limited guiding capacity of the air guide plate 10'. After being sent out, it quickly rises and returns to the upper air inlet 11', where it is drawn into the heat exchange duct. This causes some of the heat exchange airflow to circulate only in a small area at the top of the room and cannot spread to the entire room. As a result, the heating stratification phenomenon inside the room is obvious, and people feel hot in the head and cold in the feet, making the user experience uncomfortable.

[0088] and Figure 12 and Figure 13 The diagrams show the heat exchange airflow circulation in cooling and heating modes of an embodiment of the air conditioner indoor unit provided by the present invention. Figure 12 As shown, in cooling mode, the heat exchange airflow is sent into the room from the first air outlet 11 in a roughly horizontal direction, and then returns from bottom to top to the lower end of the indoor unit 100. The airflow travels along the ceiling to the far end of the room, then flows along the ceiling, slowly descends to the floor upon reaching the opposite wall, and finally enters from the bottom of the air conditioner, completing a large airflow circulation. This not only prevents cold air from blowing in, but also circulates the heat exchange airflow throughout the room, resulting in better room temperature uniformity and greatly improving comfort. Figure 13 As shown, in heating mode, the heat exchange airflow is sent downwards from the second air outlet 12 in a roughly vertical direction into the room, and then returns upwards to the upper part of the indoor unit 100 of the air conditioner. The heat exchange airflow is sent vertically along the wall to the floor, then flows along the floor, and slowly rises to the top of the room when it reaches the opposite wall. Finally, it is drawn into the air conditioner from the top of the room, completing a large circulation of heat exchange airflow. This not only prevents hot air from failing to sink, resulting in a hot head and cold feet, but also circulates the heat exchange airflow throughout the room, resulting in better room temperature uniformity, reducing heat stratification, effectively increasing foot temperature, and greatly improving comfort.

[0089] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. An indoor unit for an air conditioner, characterized in that, include: The housing has an air duct, an air inlet, a first air outlet, and a second air outlet located below the first air outlet. The air duct includes an air inlet section adjacent to the air inlet, a first air outlet section adjacent to the first air outlet, and a second air outlet section adjacent to the second air outlet. as well as, A duct switching plate forms part of the duct wall of the duct. The duct switching plate is movably disposed on the housing to have a first working position and a second working position. In the first working position, the air inlet section is connected to the first air outlet section. In the second working position, the air inlet section is connected to the second air outlet section. The indoor unit of the air conditioner also includes a bidirectional fan wheel disposed in the air duct; The air inlet is located between the first air outlet and the second air outlet in the vertical direction; The bidirectional wind turbine is a cross-flow wind turbine, and the air duct switching plate is located on the side of the cross-flow wind turbine facing away from the air inlet, and is arranged in an arc-shaped plate that bends away from the cross-flow wind turbine. The air duct switching plate is rotatably mounted on the housing, and the rotation axis of the air duct switching plate is arranged side by side with the rotation axis of the cross-flow fan. The air duct switching plate has a first rotating end and a second rotating end arranged opposite to each other on both sides of the rotation axis. The first rotating end is close to the first air outlet section, and the second rotating end is close to the second air outlet section. When the air duct switching plate is in the first working position, the first rotating end is away from the cross-flow fan wheel, and the second rotating end is close to the cross-flow fan wheel. When the air duct switching plate is in the second working position, the first rotating end is close to the cross-flow fan wheel, and the second rotating end is away from the cross-flow fan wheel.

2. The air conditioner indoor unit as described in claim 1, characterized in that, Along the axial direction of the cross-flow wind turbine, the plate length between the first rotating end and the rotating shaft is s1, and the plate length between the second rotating end and the rotating shaft is s2. The ratio of s1 / s2 is greater than or equal to 0.9 and less than or equal to 1.

1.

3. The air conditioner indoor unit as described in claim 2, characterized in that, Along the axial direction of the cross-flow wind turbine, the angle between the line connecting the two rotating shafts and the horizontal direction is greater than 0 degrees and less than 45 degrees.

4. The air conditioning indoor unit as described in any one of claims 1 to 3, characterized in that, The duct wall of the first air outlet section includes a first air outlet bottom shell extending from the first air outlet toward the duct switching plate, and the duct wall of the second air outlet section includes a second air outlet bottom shell extending from the second air outlet toward the duct switching plate. When the air duct switching plate is in the first working position, the first rotating end overlaps with the first air outlet bottom shell; when the air duct switching plate is in the second working position, the second rotating end overlaps with the second air outlet bottom shell.

5. The air conditioner indoor unit as described in claim 4, characterized in that, The housing has a mounting side and a front side located in front of the mounting side. The first air outlet bottom shell is inclined forward and upward, and the second air outlet bottom shell is inclined forward and downward.

6. The air conditioner indoor unit as described in claim 5, characterized in that, The first air outlet bottom shell has a first air guide section adjacent to the first air outlet, the first air guide section making an angle greater than or equal to 0 degrees and less than or equal to 60 degrees with the horizontal direction; and / or, The second air outlet bottom shell has a second air guide section adjacent to the second air outlet, and the angle between the second air outlet section and the horizontal direction is greater than or equal to 45 degrees and less than or equal to 90 degrees.

7. The air conditioner indoor unit as described in claim 5, characterized in that, The first air outlet bottom shell has a first air guide section adjacent to the first air outlet, the first air guide section making an angle greater than or equal to 10 degrees and less than or equal to 20 degrees with the horizontal direction; and / or, The second air outlet bottom shell has a second air guide section adjacent to the second air outlet, and the angle between the second air outlet section and the horizontal direction is greater than or equal to 80 degrees and less than or equal to 90 degrees.

8. The air conditioning indoor unit as described in any one of claims 1 to 3, characterized in that, The air inlet section includes a first volute and a second volute, which are spaced apart in the vertical direction. The first volute extends from the upper part of the air inlet toward the cross-flow impeller, and the second volute extends from the lower part of the air inlet toward the cross-flow impeller.

9. The air conditioner indoor unit as described in claim 8, characterized in that, When the air duct switching plate is in the first working position, the cross-flow fan inlet angle formed between the second rotating end and the first volute tongue is greater than or equal to 150 degrees and less than or equal to 180 degrees. When the air duct switching plate is in the second working position, the cross-flow fan inlet angle formed between the first rotating end and the second volute tongue is greater than or equal to 150 degrees and less than or equal to 180 degrees.

10. The air conditioning indoor unit as described in any one of claims 1 to 3, characterized in that, The housing has a mounting side and a front side located in front of the mounting side. The air inlet is located on the front side of the housing and is positioned between the first air outlet and the second air outlet in the vertical direction.

11. The air conditioner indoor unit as described in claim 10, characterized in that, The front side of the housing is provided with a panel extending in the vertical direction. The panel is detachably disposed at the air inlet. When the panel is open, it has a first opening position in which the upper end of the panel is rotatably connected to the housing and the lower end of the panel is separated from the housing, and a second opening position in which the lower end of the panel is rotatably connected to the housing and the upper end of the panel is separated from the housing.

12. The air conditioning indoor unit as described in any one of claims 1 to 3, characterized in that, The casing is also provided with a first cover plate and a second cover plate, the first cover plate being closable at the first air outlet, and the second cover plate being closable at the second air outlet.

13. The air conditioner indoor unit as described in claim 12, characterized in that, The housing has a mounting side and a front side located in front of the mounting side. When the first air outlet is opened, the first cover extends forward and upward from the first air outlet, and when the second air outlet is opened, the second cover extends forward and downward from the second air outlet.

14. An air conditioner, characterized in that, Including the indoor unit of an air conditioner as described in any one of claims 1 to 13.

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