Air conditioning indoor units and air conditioning units

Abstract

This disclosure relates to an indoor air conditioning unit and an air conditioning system. The indoor air conditioning unit includes: a housing, comprising a top plate and a bottom plate, the top plate having a first air outlet for cooling mode airflow, and the bottom plate having a second air outlet for heating mode airflow; a cross-flow fan blade disposed within the housing, the central axis of which extends along a first direction of the housing; and an air duct assembly, comprising a volute and a volute tongue connected to each other, the volute and volute tongue being spaced apart circumferentially along the cross-flow fan blade to form an air duct inlet and an air duct outlet on the circumferential sidewall of the air duct assembly. The air duct assembly is rotatable about its central axis to allow the indoor air conditioning unit to switch between an upper airflow state in cooling mode and a lower airflow state in heating mode. The air inlet angle of the air duct inlet is adjustable to allow the air duct inlet to have different air inlet angles in the upper and lower airflow states, the air inlet angle being the central angle of the air duct inlet relative to the central axis.

Description

Technical Field

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

[0002] As living standards improve, people have higher expectations for the cooling and heating performance of air conditioners. Currently, most mainstream air conditioner indoor units have only one air outlet, with air intake at the top and air outlet at the bottom. In both cooling and heating modes, they share the same air duct, making it impossible to avoid cold air blowing directly on people and limiting the range of hot and cold air delivery, thus affecting user comfort and cooling / heating efficiency. Therefore, air conditioner indoor units with both top and bottom air outlets have been developed.

[0003] Conventional air conditioner indoor units with top and bottom airflow have a fixed air duct structure. The direction of airflow can be changed by switching the position of the air duct components in cooling and heating modes. However, currently available air conditioner indoor units with top and bottom airflow are prone to producing a breathing noise during use. Utility Model Content

[0004] The embodiments of this disclosure provide an indoor air conditioning unit and an air conditioning system that can alleviate the problem of breathing noise in the indoor air conditioning unit during operation.

[0005] According to one aspect of this disclosure, an air conditioning indoor unit is provided, comprising:

[0006] The housing includes a top plate and a bottom plate. The top plate has a first air outlet for air outlet in cooling mode, and the bottom plate has a second air outlet for air outlet in heating mode.

[0007] A cross-flow fan blade is disposed within the housing, and the central axis of the cross-flow fan blade extends along a first direction of the housing; and

[0008] The air duct assembly includes an interconnected volute and a volute tongue, which are spaced apart circumferentially along the cross-flow fan blades to form an air duct inlet and an air duct outlet on the circumferential sidewall of the air duct assembly. The air duct assembly is rotatable about a central axis to allow the indoor unit of the air conditioner to switch between an upper air outlet state in cooling mode and a lower air outlet state in heating mode.

[0009] The air inlet angle of the air duct is adjustable so that the air inlet has different air inlet angles in the upward air outlet state and the downward air outlet state. The air inlet angle is the central angle of the air duct inlet relative to the central axis.

[0010] In some embodiments, the cochlear tongue includes:

[0011] The first section has the first guiding surface; and

[0012] The second section is movably connected to the first section and has a second air guide surface. The second section has a first position and a second position.

[0013] In the first position, the first air guide surface and the second air guide surface together form a volute tongue air guide surface; in the second position, the position of the second segment is configured such that only the first air guide surface forms a volute tongue air guide surface.

[0014] In some embodiments, the second segment is connected to the side of the first segment near the air duct inlet.

[0015] In some embodiments, the length of the first segment along the circumference of the cross-flow fan blades is greater than the length of the second segment.

[0016] In some embodiments, the second segment is hinged to the side of the first segment near the air duct inlet via a pivot, the pivot extending in the same direction as the central axis, and the pivot is located on the side of the volute guide surface away from the cross-flow fan blade.

[0017] In some embodiments, in the second position, the second air guide surface and the first air guide surface are opposite to each other.

[0018] In some embodiments, the indoor unit of the air conditioner further includes a first driving component disposed within the housing along the axial direction of the cross-flow fan blade at the end of the volute tongue, the first driving component being configured to drive a second section of rotation.

[0019] In some embodiments, the indoor unit of the air conditioner further includes a limiting structure disposed on the side of the first section radially away from the cross-flow fan blades, configured to limit the maximum rotational travel of the second section to the second position.

[0020] In some embodiments, the air inlet angle of the air duct in the upward air outlet state and the downward air outlet state has a preset difference, and the absolute value of the preset difference ranges from 10° to 30°.

[0021] In some embodiments, the indoor unit of the air conditioner also includes a heat exchanger located between the top plate and the cross-flow fan blades;

[0022] The air inlet angle of the duct is α when it is in the upward air outlet state and β when it is in the downward air outlet state, where β < α.

[0023] According to another aspect of this disclosure, an air conditioning unit is proposed, including the indoor unit of the above-described embodiments.

[0024] Based on the above technical solution, the air conditioner indoor unit of this embodiment allows for adjustable air inlet angles at the duct inlet. This enables the duct inlet to have different inlet angles in both upward and downward air outlet states, ensuring that the outlet airflow velocity or the pressure difference between the outlet and return airflows is within a suitable range. This improves airflow stability or prevents excessive noise caused by excessively high outlet airflow velocity. Furthermore, when adjusting the outlet airflow velocity according to heat exchange requirements, the inlet angle can be adjusted to change the inlet airflow velocity, thereby matching it with the outlet airflow velocity. Therefore, this type of air conditioner indoor unit can reduce surging noise, improve the stability of unit operation, and enhance user comfort. Attached Figure Description

[0025] The accompanying drawings, which are included to provide a further understanding of this disclosure and form part of this application, illustrate exemplary embodiments of this disclosure and are used to explain this disclosure, but do not constitute an undue limitation of this disclosure. In the drawings:

[0026] Figure 1 This is a schematic diagram of the structure of some embodiments of the indoor unit of the air conditioner disclosed herein.

[0027] Figure 2 This is a schematic diagram showing the second segment of the cochlear tongue in a first position in some embodiments.

[0028] Figure 3 This is a schematic diagram showing the second segment of the cochlear tongue in a second position in some embodiments.

[0029] Figure 4 This is a schematic diagram of the air conditioner indoor unit in cooling mode with the air outlet in some embodiments of the present disclosure.

[0030] Figure 5 This is a schematic diagram of the air outlet state of some embodiments of the air conditioner indoor unit in heating mode.

[0031] Figure 6 This is a schematic diagram showing the second segment of the cochlear tongue in a first position in some other embodiments.

[0032] Explanation of reference numerals in the attached figures

[0033] 1. Housing; 11. Top plate; 12. Bottom plate; 13. Rear plate; 14. Front plate; 10. First air outlet; 20. Second air outlet; 111. First air guide plate; 121. Second air guide plate;

[0034] 2. Cross-flow fan blades; 21. Air duct inlet; 22. Air duct outlet;

[0035] 3. Heat exchanger; 31. First heat exchange section; 32. Second heat exchange section;

[0036] 4. Volute tongue; 41. First section; 411. First main body; 412. First air guide surface; 413. First connecting plate; 414. Reinforcing plate; 415. First protrusion; 42. Second section; 421. Second main body; 422. Second air guide surface; 423. Second connecting plate; 424. Second protrusion; 43. Rotating shaft;

[0037] 5. Snail shell;

[0038] 6. Blocking components;

[0039] 7. First water receiving tray;

[0040] 8. Second water receiving tray;

[0041] 9. Limiting structure;

[0042] x, first direction; y, second direction; z, third direction. Detailed Implementation

[0043] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The descriptions of the exemplary embodiments are merely illustrative and are in no way intended to limit the present disclosure or its application or use. The present disclosure may be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that the present disclosure will be thorough and complete, and will fully express the scope of the disclosure to those skilled in the art. It should be noted that, unless specifically stated otherwise, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values ​​set forth in these embodiments should be interpreted as exemplary only and not as limiting.

[0044] The terms "first," "second," and similar words used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "including" or "contains" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well. Terms such as "above," "below," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, this relative positional relationship may also change accordingly.

[0045] In this disclosure, when a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediary device, or it may be not directly connected to the other devices but have an intermediary device.

[0046] All terms used in this disclosure (including technical or scientific terms) have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, such as a dictionary, should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and not as having an idealized or highly formalized meaning, unless expressly defined herein.

[0047] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0048] Based on the embodiments disclosed above, in the absence of explicit denial or conflict, the technical features of one embodiment may be advantageously combined with one or more other embodiments.

[0049] The inventors discovered through research that current air conditioner indoor units with top and bottom air outlets are prone to producing a "suspension noise" during operation. The main reason is that while the indoor unit can achieve top and bottom air outlets, the internal structure of the upper and lower areas differs. When the airflow direction changes in different modes, the airflow resistance also changes, easily causing fluctuations in the pressure difference between the outlet and return airflows, resulting in unstable airflow. Therefore, the airflow velocity differs between top and bottom air outlet states, causing the unit to produce a "suspension noise," affecting user comfort.

[0050] First, this disclosure proposes an indoor unit for an air conditioner, such as Figures 1 to 6 As shown, for example, the indoor unit of the air conditioner is a wall-mounted unit. In some embodiments, the indoor unit of the air conditioner includes:

[0051] The housing 1 includes a top plate 11 and a bottom plate 12. The top plate 11 is provided with a first air outlet 10 for air outlet in cooling mode, and the bottom plate 12 is provided with a second air outlet 20 for air outlet in heating mode.

[0052] A cross-flow fan blade 2 is disposed within the housing 1, and the central axis O of the cross-flow fan blade 2 extends along the first direction x of the housing 1; and

[0053] The air duct assembly includes a volute 5 and a volute tongue 4 connected to each other. The volute 5 and the volute tongue 4 are arranged circumferentially along the cross-flow fan blade 2 to form an air duct inlet 21 and an air duct outlet 22 on the circumferential sidewall of the air duct assembly. The air duct assembly is rotatable about the central axis O so that the indoor unit of the air conditioner can switch between the upper air outlet state in the cooling mode and the lower air outlet state in the heating mode.

[0054] The air inlet angle of the air duct inlet 21 is adjustable so that the air duct inlet 21 has different air inlet angles in the upper air outlet state and the lower air outlet state. The air inlet angle is the central angle of the air duct inlet 21 relative to the central axis O.

[0055] Specifically, in the length direction of the first direction, the housing 1 also includes a front plate 14 and a rear plate 13. The front plate 14 and the rear plate 13 are connected between the top plate 11 and the bottom plate 12 and are relatively spaced apart along a second direction y, which is perpendicular to the first direction x and is the width direction of the housing 1. The top plate 11 and the bottom plate 12 are relatively spaced apart along a third direction z, which is perpendicular to the first direction x and the second direction y. The third direction z can be the height direction of the housing 1. The housing 1 also includes two side plates, which are connected between the top plate 11 and the bottom plate 12 and are spaced apart along the first direction x. The top plate 11, the bottom plate 12, the front plate 14, the rear plate 13, and the two side plates form an accommodating space.

[0056] Optionally, the top plate 11, bottom plate 12, front plate 14, rear plate 13 and two side plates may be straight plates, curved plates, a combination of straight plates and curved plates, or other shapes.

[0057] The cross-flow fan blade 2 extends along the first direction x, forming a long cylindrical shape. The top plate 11 has a first air outlet 10, which extends along the first direction x and its length continuously covers the length of the cross-flow fan blade 2. The bottom plate 12 has a second air outlet 20, which also extends along the first direction x and its length continuously covers the length of the cross-flow fan blade 2. This structure increases the airflow volume. Optionally, the first air outlet 10 and the second air outlet 20 can be intermittently arranged along the first direction x. Optionally, the shapes of the first air outlet 10 and the second air outlet 20 can be rectangular, elliptical, circular, or any other shape. The rotation direction of the cross-flow fan blade 2 can remain constant.

[0058] The duct assembly is rotatable around its central axis, and a second drive component for driving the rotation of the duct assembly can be disposed within the housing 1. The duct assembly includes a volute 5 and a volute tongue 4 connected to each other. The volute 5 and the volute tongue 4 are spaced apart circumferentially along the cross-flow fan blade 2 to form a duct inlet 21 and a duct outlet 22 on the circumferential sidewall of the duct assembly. The duct inlet 21 allows airflow to enter the cross-flow fan blade 2, and the duct outlet 22 allows airflow to exit from the cross-flow fan blade 2. The duct inlet 21 and the duct outlet 22 can be continuously or intermittently arranged in the first direction x.

[0059] like Figure 1 As shown, a limiting structure 9 is provided in the area between the base plate 12 and the rear plate 13. The limiting structure can be a bent plate-like structure. In cooling mode, as... Figure 4 As shown, the limiting structure 9 is used to limit the bending edge of the volute 5; in heating mode, as... Figure 5 As shown, the limiting structure 9 is used to limit the bent edge of the worm tongue 4.

[0060] The air inlet angle of the air duct inlet 21 can be adjusted in various ways, such as adjusting the relative position of the volute 5 or the volute tongue 4 in the circumferential direction, or changing the length of the air guide surface by structural changes of the volute 5 or the volute tongue 4 itself. All of these are within the protection scope of this disclosure.

[0061] In this embodiment, the indoor unit of the air conditioner has a rotatable air duct assembly housed within the casing 1. By rotating the air duct assembly, the airflow direction can be changed, enabling the indoor unit to switch between an upward airflow state in cooling mode and a downward airflow state in heating mode. This allows for upward blowing of cold air and downward blowing of hot air, thereby optimizing the cooling and heating effects and improving user comfort. By setting a first air outlet 10 for cooling mode on the top plate 11 and a second air outlet 20 for heating mode on the bottom plate 12, the height difference of the indoor unit casing can be fully utilized to increase the uniformity of the distribution of hot and cold air during indoor movement, solving the problems of rising hot air, small air delivery range, and poor effect in heating mode. By setting air outlets on the top plate 11 and bottom plate 12 respectively to achieve upward and downward airflow, there is no need to forcibly guide the airflow at the fan outlet, which reduces airflow impact loss and increases the air delivery range during cooling and heating, improving human comfort.

[0062] Specifically, by setting a first air outlet 10 on the top plate 11 for cooling mode, the cold air blows upward, avoiding direct airflow onto people. At the same time, by making full use of the height of the indoor unit, the air outlet height of the cold air is raised, allowing the cold air to be more evenly distributed in the room as it descends, circulating fully and creating a shower-like cooling effect, thereby improving the cooling effect and user comfort. By setting a second air outlet 20 on the bottom plate 12 for heating mode, the hot air blows downward, allowing the hot air to be directly delivered to the ground. This allows the hot air to be more evenly distributed in the room as it rises, circulating fully and creating a carpet-like heating effect, thereby improving the heating effect and user comfort.

[0063] Moreover, since the cross-flow fan blade 2 has a large length along the first direction x, it is not necessary to arrange multiple fans side by side in the first direction x, and the first air outlet 10 and the second air outlet 20 can be set with a large length in the first direction x, thereby improving the uniformity of air outlet along the first direction x.

[0064] Furthermore, when the indoor unit of the air conditioner achieves both upward and downward airflow, it involves switching between the first air outlet 10 and the second air outlet 20. However, the duct structure or size differs between the upper and lower areas within the casing 1, and the heat exchanger 3 also affects airflow resistance. Consequently, the inlet and outlet resistances differ between cooling and heating modes, and the pressure difference between the outlet and return airflows also changes between the two modes, resulting in unstable airflow. The embodiments of this disclosure allow for adjustable inlet angles of the duct inlet 21, enabling different inlet angles in the upward and downward airflow states. This ensures that the outlet airflow velocity or the pressure difference between the outlet and return airflows is within a suitable range, improving airflow stability or preventing excessive noise due to excessive outlet velocity. Alternatively, when adjusting the outlet velocity according to heat exchange requirements, the inlet angle can be adjusted to change the inlet velocity, thus matching the outlet velocity. Therefore, this type of indoor air conditioner can reduce surging noise, improve the stability of unit operation, and enhance user comfort.

[0065] In some embodiments, such as Figure 2 and Figure 3 As shown, the cochlear tongue 4 includes:

[0066] The first section 41 has a first air guiding surface 412; and

[0067] The second segment 42 is movably connected to the first segment 41 and has a second air guide surface 422. The second segment 42 has a first position and a second position.

[0068] In the first position, the first air guide surface 412 and the second air guide surface 422 together form a volute tongue air guide surface; in the second position, the position of the second segment 42 is configured such that only the first air guide surface 412 forms a volute tongue air guide surface.

[0069] For example, the first air guide surface 412 can be a curved surface, and the second air guide surface 422 can be a curved surface or a plane.

[0070] like Figure 2 As shown, when the second segment 42 moves to the first position, the second segment 42 extends outward relative to the first segment 41, which is equivalent to increasing the length of the first air guide surface 412. The first air guide surface 412 and the second air guide surface 422 together form a complete volute tongue air guide surface.

[0071] like Figure 3 As shown, when the second segment 42 moves to the second position, the second air guide surface 422 leaves the extension area of ​​the first air guide surface 412, and the first air guide surface 412 forms a volute tongue air guide surface on its own.

[0072] When the second segment 42 is in the first or second position, position maintenance is required to ensure the stability of gas flow.

[0073] This embodiment movably connects the second segment 42 of the volute tongue 4 to the first segment 41, allowing the second segment 42 to be selectively positioned in either the first or second position in both upward and downward airflow states. This alters the inlet angle of the duct inlet 21, ensuring the outlet airflow velocity or the pressure difference between the outlet and return airflows remains within a suitable range, improving airflow stability or preventing excessive noise due to excessive outlet velocity. Alternatively, when adjusting the outlet airflow velocity according to heat exchange requirements, the inlet angle can be adjusted to match the outlet velocity. Therefore, this type of indoor air conditioning unit reduces surging noise, improves unit operational stability, and enhances user comfort. Furthermore, this method of adjusting the inlet angle only involves partial movement of the volute tongue 4, resulting in a simple structure, convenient control, and no alteration to the overall structure of the duct assembly. It also helps maintain the airflow gap between the volute tongue 4 and the cross-flow fan blades 2.

[0074] In some embodiments, the second segment 42 is connected to the side of the first segment 41 near the air duct inlet 21.

[0075] In this embodiment, whether in the top or bottom air outlet state, the movement of the second section 42 can directly affect the air inlet angle while the first section 41 remains in a fixed position, thereby changing the size of the air inlet angle. Furthermore, to ensure smooth airflow from the duct inlet 21 into the gap between the volute tongue 4 and the cross-flow fan blade 2, the gap between the volute tongue 4 and the cross-flow fan blade 2 can be made larger near the duct inlet 21 than near the duct outlet 22. Positioning the second section 42 near the duct inlet 21 prevents its movement from affecting the cross-flow fan blade 2, thus improving the operational reliability of the indoor air conditioning unit.

[0076] In some embodiments, such as Figure 2 and Figure 3 As shown, the length of the first segment 41 along the circumference of the cross-flow fan blade 2 is greater than the length of the second segment 42.

[0077] This embodiment divides the volute tongue 4 into two parts, adopting a segmented structure. The circumferential length of the movable second segment 42 is less than that of the first segment 41. When controlling the movement of the second segment 42 in cooling or heating mode, the smaller volume of the second segment 42, being only a smaller part of the volute tongue 4, improves the stability of the second segment 42 during movement, facilitating accurate position maintenance. Correspondingly, the circumferential length of the second guide surface 422 is also less than that of the first guide surface 412. Regardless of whether it is cooling or heating mode, the airflow is primarily guided by the first guide surface 412, with the second guide surface 422 playing only an auxiliary role in forming the volute tongue guide surface. This ensures the relative positional accuracy between the volute tongue guide surface and the cross-flow fan blade 2, as well as the dimensional accuracy of the volute tongue guide surface.

[0078] In some embodiments, such as Figure 2 and Figure 3 As shown, the second section 42 is hinged to the side of the first section 41 near the air duct inlet 21 via a rotating shaft 43. The rotating shaft 43 extends in the same direction as the central axis O, and the rotating shaft 43 is located on the side of the volute tongue guide surface away from the cross-flow fan blade 2.

[0079] The first segment 41 includes a first main body 411, which is a V-shaped plate. A first air guide surface 412 is the outer surface of one side segment of the V-shaped plate. A first connecting plate 413 can be provided between the two side segments of the V-shaped plate. Multiple first connecting plates 413 can be spaced apart along a first direction x. A reinforcing plate 414 is provided between adjacent first connecting plates 413, extending along the first direction x. At least two reinforcing plates 414 can be spaced apart along the length of the side segment of the V-shaped plate where the first air guide surface 412 is located. Figure 5 As shown, in heating mode, the limiting structure 9 is used to limit the other side plate segment of the V-shaped plate.

[0080] The second segment 42 includes a second main body 421, which is a flat plate. The flat plate here also includes a plate with a slight curvature, but does not include obvious bends. A second connecting plate 423 may be provided on the back of the second main body 421. For example, the second connecting plate 423 is triangular.

[0081] Based on this, the rotating shaft 43 can be set on the first connecting plate 413 and the second connecting plate 423, which can improve the reliability and stability of the connection between the first section 41 and the second section 42, and make the rotating shaft 43 located on the side of the volute tongue guide surface away from the cross-flow fan blade 2.

[0082] In this embodiment, the second segment 42 is hinged to the side of the first segment 41 near the air duct inlet 21. The second segment 42 can be easily rotated to switch between a first position and a second position. In the first position, the second segment 42 reliably connects with the first segment 41, forming a complete volute tongue guide surface. In the second position, rotating the second segment 42 backward by a preset angle disengages the second guide surface 422 from the volute tongue guide surface, reliably adjusting the air inlet angle. Furthermore, the rotating shaft 43 is located on the side of the volute tongue guide surface away from the cross-flow fan blade 2, so rotating the second segment 42 to the first position does not affect the volute tongue guide surface at all.

[0083] Alternatively, when the second section 42 rotates less than a preset angle in the direction away from the cross-flow fan blade 2, it can be used to appropriately increase the gap between the volute tongue 4 and the cross-flow fan blade 2 at the air duct inlet 21, and adjust the working performance of the cross-flow fan by adjusting the gap parameter.

[0084] In other embodiments, such as Figure 6As shown, when the second segment 42 is in the first position, the first main body 411 and the second main body 421 are provided with a concave-convex mating structure at the joint, which is used to reduce air leakage from the gap when the first segment 41 and the second segment 42 are spliced ​​together to form a complete volute tongue air guide surface, reduce airflow loss, and improve the working efficiency of the cross-flow fan.

[0085] Specifically, the first main body 411 has a first protrusion 415 on its end face near the second main body 421, and the first protrusion 415 is positioned close to the first air guide surface 412; the second main body 421 has a second protrusion 424 on its end face near the first main body 411, and the second protrusion 424 is positioned away from the second air guide surface 422. Thus, both the ends of the first main body 411 and the second main body 421 form a stepped structure, and the first protrusion 415 and the second protrusion 424 overlap to form a mating structure. When the second section 42 is in the first position, it prevents airflow leakage from the gap between the first main body 411 and the second main body 421, improving the working efficiency of the cross-flow fan. Moreover, when the second section 42 is in the second position, the first air guide surface 412 remains planar and does not affect its airflow guiding function.

[0086] Optionally, the second segment 42 can be telescopically slid relative to the first segment 41 to change the length of the volute tongue guide surface, thereby adjusting the air inlet angle.

[0087] In some embodiments, such as Figure 3 As shown, in the second position, the second section 42 rotates so that the second guide surface 422 and the first guide surface 412 are opposite to each other. In the radial direction of the cross-flow fan blade 2, the second section 42 rotates to the side of the axis of rotation 43 away from the first section 41.

[0088] In this embodiment, during the process of the second segment 42 switching from the first position to the second position, the second segment 42 is rotated by a large angle, for example from... Figures 2 to 3 Rotating approximately 180° ensures that the second section 42 does not exceed the edge of the first section 41 when in the second position, thus minimizing the impact of the second section 42 on the first section 41 in the second position and enabling reliable air intake in this state.

[0089] In some embodiments, the indoor unit of the air conditioner further includes a first driving component located inside the housing 1 and disposed at the end of the volute tongue 4 along the axial direction of the cross-flow fan blade 2. The first driving component is configured to drive the second section 42 to rotate.

[0090] For example, the first driving component can be a motor or electric motor, and a connecting shaft can be provided on the second segment 42. The connecting shaft is coaxial with the rotating shaft 43. The output shaft of the first driving component can directly drive the second segment 42 to rotate, or the output shaft of the first driving component can drive the second segment 42 to rotate through a transmission component.

[0091] The housing 1 may also be equipped with a second driving component for driving the air duct assembly to rotate. The second driving component may also be located at the end of the air duct assembly. The second driving component may directly drive the air duct assembly to rotate, or it may drive the air duct assembly to rotate through a transmission component. During the process of the second driving component driving the air duct assembly to rotate, the first driving component rotates together with the air duct assembly to a specific position.

[0092] This embodiment, by setting a first driving component, can automatically control the second segment 42 of the volute tongue 4 to rotate and switch between a first position and a second position. When it is necessary to activate the cooling mode or the heating mode, depending on the space within the air duct, the entire air duct assembly can be rotated to the matching position first, and then the first driving component can be controlled to rotate the second segment 42 to the desired first or second position; or the driving component can be controlled to rotate the second segment 42 to the desired first or second position first, and then the entire air duct assembly can be rotated to the matching position. Therefore, the adjustment of the air inlet angle under different heat exchange modes can be conveniently realized, and the control accuracy of the air inlet angle adjustment can be improved.

[0093] In some embodiments, reference Figure 3 The indoor unit of the air conditioner also includes a limiting structure disposed on the side of the first section 41 radially away from the cross-flow fan blade 2, configured to limit the maximum rotational stroke of the second section 42 to the second position. The limiting structure is not shown in the figure.

[0094] For example, the limiting structure can be provided on the first connecting plate 413 or the reinforcing plate 414.

[0095] This embodiment provides a limiting structure on the side of the first segment 41 that is radially away from the cross-flow fan blade 2. When the second segment 42 rotates to the second position, the limiting structure can limit the maximum angle of rotation of the second segment 42 to prevent the second segment 42 from rotating too much and interfering or colliding with the first segment 41. This allows for precise positioning of the second segment 42, and the second segment 42 can be reliably maintained in the second position through the action of the limiting structure and the first driving component.

[0096] In some embodiments, the air inlet angle of the air duct inlet 21 in the upper air outlet state and the lower air outlet state has a preset difference, and the absolute value of the preset difference ranges from 10° to 30°.

[0097] This embodiment controls the preset difference between the air inlet angle in the upper and lower air outlet states within a suitable range. By controlling the lower limit of the air inlet angle difference between the two states, the adjustment of the air inlet in different states can have a significant effect on the noise control of the indoor unit of the air conditioner, and the second section 42 can reach a certain circumferential length, which facilitates the connection with the first section 41 and makes it easy to control the rotation of the second section 42. Furthermore, by controlling the upper limit of the air inlet angle difference between the two states, the airflow is mainly guided by the first air guide surface 412, regardless of whether it is cooling mode or heating mode. The second air guide surface 422 only plays an auxiliary role in forming the volute tongue air guide surface, which can ensure the relative positional accuracy between the volute tongue air guide surface and the cross-flow fan blade 2, and ensure the surface dimensional accuracy of the volute tongue air guide surface.

[0098] In some embodiments, the indoor unit of the air conditioner also includes a heat exchanger 3, which is located between the top plate 11 and the cross-flow fan blade 2;

[0099] The air inlet angle of the air duct inlet 21 is α in the upward air outlet state and β in the downward air outlet state, where β < α.

[0100] For example, the heat exchanger 3 may include a first heat exchange section 31 and a second heat exchange section 32. The first heat exchange section 31 and the second heat exchange section 32 are arranged at an angle and their tops are connected. The bottom end of the first heat exchange section 31 extends downward at an angle to near the front plate 14, and the bottom end of the second heat exchange section 32 extends downward at an angle to near the rear plate 13, forming an inverted V-shaped structure. A first water receiving tray 7 is provided below the first heat exchange section 31, and a second water receiving tray 8 is provided below the second heat exchange section 32.

[0101] like Figure 1 As shown, a blocking member 6 is provided below the first water receiving tray 7, and the blocking member 6 is rotatably mounted. In the cooling state, as... Figure 4 As shown, the baffle 6 is located between the volute tongue 4 and the first drip tray 7 to prevent the exhaust airflow from flowing from the space between the volute tongue 4 and the first drip tray 7 to the air inlet side. In heating mode, as... Figure 5 As shown, the blocking member 6 is located between the volute 5 and the first water receiving tray 7 to prevent the air intake airflow from flowing from the space between the volute 5 and the first water receiving tray 7 to the air outlet side.

[0102] Among them, such as Figure 4 As shown, the entire unit is in cooling mode, with the volute 5 on the right and the volute tongue 4 on the upper left. At this time, air enters from the second air outlet 20 at the bottom and exits from the first air outlet 10 at the top. The airflow enters from the air duct inlet 21 at the bottom of the air duct assembly, flows out from the air duct outlet 22 at the top after passing through the cross-flow fan blades 2, and then flows out from the first air outlet 10 after passing through the heat exchanger 3.

[0103] In cooling mode, heat exchanger 3 is located in the outlet section, where the outlet resistance is relatively high and the inlet resistance is relatively low. At this time, the relative airflow velocities of the inlet and outlet will not cause abnormal noise such as unit heave. However, to compensate for the low airflow velocity and small unit air volume per unit time caused by the high resistance of heat exchanger 3 in the outlet section, it is necessary to increase the outlet airflow velocity. In this case, the second section 42 can be positioned in the second position, causing the volute tongue 4 to be in a folded state. The second section 42 is not within the volute tongue guide surface, which is formed solely by the first guide surface 412. This results in a larger inlet angle α and a relatively larger inlet area, which can improve the outlet airflow and increase the unit air volume per unit time. Therefore, to improve the outlet airflow, it is not necessary to increase the rotational speed of the cross-flow fan 2, thus reducing the overall unit noise and improving the unit's sound quality.

[0104] like Figure 5 As shown, when the unit is in heating mode, the volute 5 is on the left and the volute tongue 4 is on the lower right. At this time, air enters from the first air outlet 10 at the top and exits from the second air outlet 20 at the bottom. The airflow enters from the first air outlet 10, passes through the heat exchanger 3 at the top, enters the air duct inlet 21 at the top of the air duct assembly, passes through the cross-flow fan blades 2, and exits from the air duct outlet 22 at the bottom, exiting from the first air outlet 10.

[0105] In cooling mode, heat exchanger 3 is located in the air inlet section, where the air inlet resistance is relatively high and the air outlet resistance is low. Without other measures, the low air outlet resistance will result in a high airflow velocity at the outlet, causing abnormal noises such as heaving in the unit. To reduce noise, the airflow velocity in the outlet section needs to be reduced, which in turn requires further reduction of the airflow velocity in the inlet section. At this time, the second section 42 can be positioned in the first position, so that the volute tongue 4 is in the unfolded state. The second section 42 and the first section 41 are joined together to form the volute tongue 4. The air guide surface of the volute tongue is formed by the combination of the first air guide surface 412 and the second air guide surface 422. The air inlet angle β is relatively small, and the corresponding air inlet area is relatively small, which can reduce the air intake volume, thereby reducing the airflow velocity at the outlet and making the airflow velocity uniform. This reduces the overall air supply noise of the unit, resulting in better unit sound quality.

[0106] In some other embodiments, the heat exchanger 3 is located between the base plate 12 and the cross-flow fan blade 2; the air inlet angle of the air duct inlet 21 is α in the upper air outlet state and β in the lower air outlet state, where β > α.

[0107] The embodiments disclosed herein are of an air conditioning indoor unit with vertical air outlets. By adjusting the inlet angle under different operating modes, the problem of unstable airflow and surging noise caused by changes in air inlet and outlet resistance when the duct structure design is fixed is solved. The first driving component drives the movable second section 42 of the volute tongue 4, changing the circumferential length of the volute tongue's air guide surface. This creates corresponding ventilation channels in cooling and heating modes, achieving changes in the inlet angle, altering the air inlet area and outlet air velocity, avoiding surging noise, optimizing overall unit sound quality, and improving user comfort.

[0108] Secondly, this disclosure provides an air conditioning unit, including the indoor unit of the air conditioning unit described in the above embodiments.

[0109] The air conditioning unit in this embodiment switches between an upward airflow state in cooling mode and a downward airflow state in heating mode via its indoor unit. This optimizes cooling and heating performance, improves user comfort, and enhances energy efficiency. Furthermore, the air outlet of this type of air conditioning unit can be made longer in the longitudinal direction, improving airflow uniformity.

[0110] Furthermore, because the air inlet angle of the air duct inlet 21 in the indoor unit of the air conditioner is adjustable, the air inlet 21 can have different air inlet angles in the upper and lower air outlet states. This ensures that the air outlet velocity or the pressure difference between the air outlet and return air is within a suitable range, improving airflow stability or preventing excessive noise caused by excessive air outlet velocity. Alternatively, when adjusting the air outlet velocity according to heat exchange requirements, the air inlet velocity can be changed by adjusting the air inlet angle to match the air outlet velocity. Therefore, this type of indoor unit can reduce breathing noise, thereby giving the air conditioning unit better sound quality, improving the stability of unit operation, and enhancing user comfort.

[0111] The present disclosure provides a detailed description of an indoor air conditioning unit and an air conditioning system. Specific embodiments have been used to illustrate the principles and implementation methods of the present disclosure. These embodiments are merely illustrative and are intended to aid in understanding the method and core concepts of the present disclosure. It should be noted that those skilled in the art can make various improvements and modifications to the present disclosure without departing from its principles, and these improvements and modifications also fall within the scope of protection of the claims of this disclosure.

Claims

1. An air conditioner indoor unit characterized by comprising: include: The housing (1) includes a top plate (11) and a bottom plate (12). The top plate (11) is provided with a first air outlet (10) for air outlet in cooling mode, and the bottom plate (12) is provided with a second air outlet (20) for air outlet in heating mode. A cross-flow fan blade (2) is disposed inside the housing (1), and the central axis (O) of the cross-flow fan blade (2) extends along the first direction (x) of the housing (1); and The air duct assembly includes a volute (5) and a volute tongue (4) connected to each other. The volute (5) and the volute tongue (4) are arranged circumferentially spaced along the cross-flow fan blade (2) to form an air duct inlet (21) and an air duct outlet (22) on the circumferential sidewall of the air duct assembly. The air duct assembly is rotatable about the central axis (O) so that the indoor unit of the air conditioner switches between the upper air outlet state in the cooling mode and the lower air outlet state in the heating mode. The air inlet angle of the air duct inlet (21) is adjustable so that the air duct inlet (21) has different air inlet angles in the upper air outlet state and the lower air outlet state. The air inlet angle is the central angle of the air duct inlet (21) relative to the central axis (O). 2.The indoor unit of the air conditioner according to claim 1, characterized in that, The cochlear tongue (4) includes: The first section (41) has a first air guiding surface (412); and The second segment (42) is movably connected to the first segment (41) and has a second air guide surface (422). The second segment (42) has a first position and a second position. In the first position, the first air guide surface (412) and the second air guide surface (422) together form the volute tongue air guide surface; in the second position, the position of the second segment (42) is configured such that only the first air guide surface (412) forms the volute tongue air guide surface. 3.The indoor unit of the air conditioner according to claim 2, characterized by, The second segment (42) is connected to the first segment (41) on the side near the air duct inlet (21). 4.The indoor unit of the air conditioner according to claim 2, characterized by, The length of the first segment (41) along the circumference of the cross-flow fan blade (2) is greater than the length of the second segment (42). 5.The indoor unit of the air conditioner according to claim 2, characterized in that, The second segment (42) is hinged to the first segment (41) near the air duct inlet (21) via a pivot (43). The pivot (43) extends in the same direction as the central axis (O) and is located on the side of the volute guide surface away from the cross-flow fan blade (2).

6. The indoor unit of the air conditioner according to claim 5, characterized in that, In the second position, the second air guide surface (422) and the first air guide surface (412) are opposite to each other.

7. The indoor unit of the air conditioner according to claim 5, characterized in that, It also includes a first drive component located inside the housing (1) and disposed at the end of the volute (4) along the axial direction of the cross-flow fan blade (2), the first drive component being configured to drive the second section (42) to rotate.

8. The indoor unit of the air conditioner according to claim 5, characterized in that, It also includes a limiting structure disposed on the side of the first segment (41) radially away from the cross-flow fan blade (2), configured to limit the maximum rotational stroke of the second segment (42) to the second position.

9. The indoor unit of the air conditioner according to any one of claims 1 to 8, characterized in that, The air inlet (21) of the air duct has a preset difference in the air inlet angle between the upper air outlet state and the lower air outlet state, and the absolute value of the preset difference ranges from 10° to 30°.

10. The indoor unit of the air conditioner according to any one of claims 1 to 8, characterized in that, It also includes a heat exchanger (3), which is located between the top plate (11) and the cross-flow fan (2); The air inlet (21) of the air duct has an air inlet angle of α in the upper air outlet state and an air inlet angle of β in the lower air outlet state, where β < α.

11. An air conditioning unit, characterized in that, Includes the air conditioning indoor unit as described in any one of claims 1 to 10.

Images