Air conditioner indoor unit and air conditioner unit

Abstract

The air conditioner indoor unit comprises a shell (1), the shell (1) comprises two side plates (13), the two side plates (13) are connected between a top plate (11) and a bottom plate (12) and are oppositely arranged in a spaced mode in the first direction (x), the top plate (11) is provided with a first opening (10) used for air outlet in a refrigeration mode, the bottom plate (12) is provided with a second opening (20) used for air outlet in a heating mode, and the first opening (10) is communicated with the second opening (20); at least one side plate (13) is provided with a third opening (30) for returning air; the fan comprises a volute assembly (2), the volute assembly (2) comprises a fixed volute (21) and a movable volute (22), the movable volute (22) is rotatably arranged in the fixed volute (21) around the central axis of the fan, so that the air conditioner indoor unit is switched between an upper air outlet state of a refrigeration mode and a lower air outlet state of a heating mode, and the central axis extends in the first direction (x). According to the air conditioner indoor unit, the refrigerating and heating effects can be optimized.

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] Currently, wall-mounted air conditioners achieve the change of hot and cold air direction by setting an air deflector at the only outlet of the fan. However, forcibly changing the air direction by using an air deflector results in large airflow impact losses, poor airflow change effect, and poor cooling and heating performance. Utility Model Content

[0003] The embodiments of this disclosure provide an indoor air conditioning unit and an air conditioning system that can optimize cooling and heating performance.

[0004] According to one aspect of this disclosure, an air conditioning indoor unit is provided, comprising:

[0005] The housing includes a top plate, a bottom plate, and two side plates connected between the top plate and the bottom plate and spaced apart from each other along a first direction. The top plate has a first opening for air outlet in cooling mode, the bottom plate has a second opening for air outlet in heating mode, and at least one side plate has a third opening for air return.

[0006] The fan includes a volute assembly, which includes a fixed volute and a movable volute. The movable volute includes an air inlet communicating with a third opening. The movable volute is rotatably disposed within the fixed volute about the central axis of the fan, so that the indoor unit of the air conditioner can switch between an upper air outlet state in cooling mode and a lower air outlet state in heating mode. The central axis extends along a first direction.

[0007] In some embodiments, the fixed volute includes an upper air outlet and a lower air outlet, the upper air outlet being connected to a first opening and the lower air outlet being connected to a second opening;

[0008] In the upper air outlet state, the air inlet and the upper air outlet are connected to form a first air outlet duct for air outlet in cooling mode; in the lower air outlet state, the air inlet and the lower air outlet are connected to form a second air outlet duct for air outlet in heating mode.

[0009] In some embodiments, the housing further includes a front plate and a rear plate that are opposite to and spaced apart along a second direction, the second direction being perpendicular to the first direction, and the upper air outlet being located along the second direction on the side of the lower air outlet away from the rear plate.

[0010] In some embodiments, the acute angle between the air outlet direction and the horizontal plane is 60° to 70°.

[0011] In some embodiments, a third opening is provided on both side panels, and the indoor unit of the air conditioner further includes:

[0012] The heat exchanger includes a first heat exchange plate and a second heat exchange plate. The first heat exchange plate is disposed between one of the side plates and the fan closest to that side plate, and the second heat exchange plate is disposed between the other side plate and the fan closest to that side plate.

[0013] In some embodiments, the housing further includes a front plate and a rear plate that are opposite to and spaced apart along a second direction, and the heat exchanger further includes a third heat exchange plate connected between the first heat exchange plate and the second heat exchange plate, and the third heat exchange plate is located between the fan and the front plate along the second direction, which is perpendicular to the first direction.

[0014] In some embodiments, the third heat exchange plate and the front plate are spaced apart along the second direction to form an airflow channel between the third heat exchange plate and the front plate.

[0015] In some embodiments, the front panel is provided with a fourth opening for return air.

[0016] In some embodiments, the fan further includes centrifugal fan blades, and multiple fans are spaced apart along a first direction. The indoor unit of the air conditioner also includes a drive component and a connector. The output end of the drive component is connected to the connector, and the connector is connected between the centrifugal fan blades of two adjacent fans.

[0017] In some embodiments, the air inlet is located on the central axis, and the third opening is positioned opposite the air inlet.

[0018] In some embodiments, the housing further includes a front plate and a rear plate that are opposite to and spaced apart along a second direction, the second direction being perpendicular to the first direction. In a projection plane perpendicular to the first direction, with the projection point of the central axis as the vertex of the included angle, the first line connecting the center of the upper air outlet and the vertex of the included angle and the second line connecting the center of the lower air outlet and the vertex of the included angle form a preset angle on the side facing the front plate, the preset angle ranging from 130° to 180°.

[0019] In some embodiments, the preset included angle ranges from 150° to 170°.

[0020] In some embodiments,

[0021] The acute angle between the air outlet direction of the second opening and the horizontal plane is 60° to 70°; and / or

[0022] The acute angle between the air outlet direction of the first opening and the horizontal plane shall not exceed 30°.

[0023] In some embodiments, the top plate includes a first guide vane that is rotatable relative to the first opening;

[0024] When the indoor unit of the air conditioner is in the upward air outlet state, the first guide vane tilts upward and opens relative to the first opening. When the indoor unit of the air conditioner is in the downward air outlet state or in the off state, the first guide vane covers the first opening.

[0025] In some embodiments, the housing further includes a front plate and a rear plate that are opposite to and spaced apart along a second direction, and a first guide plate is rotatably connected to one end of the first opening that is away from the front plate along the second direction, the second direction being perpendicular to the first direction.

[0026] In some embodiments, the base plate includes a second guide plate that is rotatable relative to the second opening;

[0027] When the indoor unit of the air conditioner is in the downward air outlet state, the second guide plate tilts downward and opens relative to the second opening. When the indoor unit of the air conditioner is in the upward air outlet state or in the off state, the second guide plate covers the second opening.

[0028] In some embodiments, a grille is provided at the third opening, the grille being configured to allow return air to pass through the third opening when the indoor unit of the air conditioner is in operation, and to close the third opening when the indoor unit of the air conditioner is in the off state.

[0029] According to another aspect of this disclosure, an air conditioning unit is proposed, including the indoor unit of the above-described embodiments.

[0030] Based on the above technical solutions, the indoor unit of the air conditioner in this embodiment is rotatably mounted in the fixed volute via a moving volute, enabling the indoor unit to switch between the upward air outlet state in cooling mode and the downward air outlet 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 providing a first opening for air outlet in cooling mode on the top plate and a second opening for air outlet in heating mode on the bottom plate, the height difference of the indoor unit casing can be fully utilized, increasing the uniformity of the distribution of cold and hot airflow during indoor movement. By providing a third opening for return air on the side plate, the internal space of the indoor unit casing can be fully utilized, improving the uniformity of the return airflow before it enters the air inlet. By providing air outlets on the top and bottom plates respectively to achieve upward and downward air outlets, it is not necessary to forcibly guide and change the airflow direction at the fan outlet, thus reducing airflow impact loss. Attached Figure Description

[0031] 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:

[0032] Figure 1 This is a structural schematic diagram of some embodiments of the air conditioner indoor unit in the downward air outlet state of this disclosure.

[0033] Figure 2 This is a structural schematic diagram of some embodiments of the air conditioner indoor unit in the upward air outlet state of this disclosure.

[0034] Figure 3 This is a schematic diagram of the structure of some embodiments of the volute assembly of the indoor unit of the air conditioner disclosed herein.

[0035] Figure 4 This is a schematic diagram of the structure of some embodiments of the volute assembly and heat exchanger of the indoor unit of the air conditioner disclosed herein.

[0036] Figure 5 This is a top view of some embodiments of the volute assembly and heat exchanger of the indoor unit of the air conditioner disclosed herein.

[0037] Figure 6 This is a schematic diagram of the structure of some embodiments of the volute assembly of the indoor unit of the air conditioner in the downward air outlet state of the present disclosure.

[0038] Figure 7 This is a cross-sectional view of some embodiments of the air conditioner indoor unit in the downward air outlet state of this disclosure.

[0039] Figure 8 This is a schematic diagram of the structure of some embodiments of the volute assembly of the indoor unit of the air conditioner in the upward air outlet state of the present disclosure.

[0040] Figure 9 This is a cross-sectional view of some embodiments of the air conditioner indoor unit in the upward air outlet state of this disclosure.

[0041] Explanation of reference numerals in the attached figures

[0042] 1. Shell; 2. Volute assembly; 3. Heat exchanger; 4. Connecting parts; 10. First opening; 20. Second opening; 30. Third opening; 11. Top plate; 12. Bottom plate; 13. Side plate; 14. Front plate; 15. Rear plate; 21. Fixed volute; 211. Upper air outlet; 212. Lower air outlet; 22. Moving volute; 220. Air inlet; 23. Centrifugal fan blade; 31. First heat exchange plate; 32. Second heat exchange plate; 33. Third heat exchange plate; 34. Arc-shaped heat exchange plate; 111. First guide plate; 112. Second guide plate; 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] First, this disclosure proposes an indoor unit for an air conditioner, such as Figures 1 to 9 As shown, it includes:

[0050] The housing 1 includes a top plate 11, a bottom plate 12, and two side plates 13. The two side plates 13 are connected between the top plate 11 and the bottom plate 12 and are spaced apart relative to each other along a first direction x. The top plate 11 has a first opening 10 for air outlet in cooling mode, the bottom plate 12 has a second opening 20 for air outlet in heating mode, and at least one side plate 13 has a third opening 30 for air return.

[0051] The fan includes a volute assembly 2, which includes a fixed volute 21 and a movable volute 22. The movable volute 22 includes an air inlet 220 communicating with a third opening 30. The movable volute 22 is rotatably disposed within the fixed volute 21 about the central axis of the fan, so that the indoor unit of the air conditioner can switch between an upper air outlet state in cooling mode and a lower air outlet state in heating mode. The central axis extends along a first direction x.

[0052] Specifically, the housing 1 also includes a front plate 14 and a rear plate 15, which are spaced apart relative to each other along a second direction y, which is perpendicular to the first direction x. The top plate 11 and the bottom plate 12 are spaced apart relative to each other 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. The top plate 11, the bottom plate 12, the front plate 14, the rear plate 15, and the two side plates 13 close together to form an accommodating space for the fan and the heat exchanger 3.

[0053] Specifically, the air inlets 220 are located on both sides of the moving volute 22 along the first direction x, and the air inlets 220 of the moving volute 22 are the air inlets of the fan. By rotatably setting the moving volute 22 around the central axis of the fan inside the fixed volute 21, it is possible to realize the return air through the third opening 30 of the side plate 13, the upper outlet for cooling airflow or the lower outlet for heating airflow.

[0054] Specifically, the fan is a centrifugal fan, and the two side plates 13 are arranged at intervals along the first direction x, that is, the third opening 30 and the air inlet 220 are both in the first direction x. This shortens the distance between the third opening 30 and the air inlet 220, facilitating the return airflow to enter the air inlet 220 and improving the uniformity of the return airflow before it enters the air inlet 220. A heat exchanger 3 is provided between the third opening 30 and the air inlet 220, and the heat exchanger 3 is configured to exchange heat with the return airflow entering the air inlet 220. The return air inlet being located on the side plate 13 of the indoor unit also reduces dust and debris falling into the casing, reducing the frequency of disassembly and cleaning of the indoor unit.

[0055] Specifically, compared to a fan with only one air outlet and a guide vane used to change the direction of hot and cold air, the movable volute design avoids forced airflow changes, reduces airflow impact losses, and optimizes cooling and heating performance.

[0056] Specifically, the moving volute 22 has an arc-shaped main body and a first overlapping end and a second overlapping end respectively disposed at both ends of the arc-shaped main body. The arc-shaped main body has a notch in the circumferential direction, which is used to form a ventilation opening. The first overlapping end includes a rounded corner portion of the volute tongue connected to the arc-shaped main body and a first overlapping portion overlapping the fixed volute 21. The rounded corner portion of the volute tongue protrudes towards the interior of the moving volute 22. The second overlapping end includes a second overlapping portion connected to the arc-shaped main body. The first overlapping portion and the second overlapping portion are used to overlap the fixed volute 21.

[0057] Specifically, the movable volute 22 can be disposed inside the cylindrical cavity of the fixed volute 21 and can rotate around the central axis of the cylindrical cavity. This allows the vent of the movable volute 22 to rotate to a position communicating with the first opening 10 to form an upward air outlet; or to rotate to a position communicating with the second opening 20 to form a downward air outlet.

[0058] Specifically, by providing a first opening 10 for cooling mode airflow on the top plate 11, the cold air is directed upwards at an angle, preventing direct airflow. Simultaneously, the height of the indoor unit is fully utilized to raise the airflow outlet height, allowing the cold air to be more evenly distributed throughout the room as it descends, creating a shower-like cooling effect and improving cooling efficiency and user comfort. Similarly, by providing a second opening 20 for heating mode airflow on the bottom plate 12, the hot air is directed downwards at an angle, allowing the hot air to be delivered directly to the ground. This ensures the hot air is more evenly distributed throughout the room as it rises, creating a carpet-like heating effect and improving heating efficiency and user comfort. Both the cold and hot air are directed away from the rear plate 15.

[0059] Optionally, the top plate 11, bottom plate 12, front plate 14, rear plate 15, and two side plates 13 may each include straight plates, curved plates, combinations of straight and curved plates, or other shapes. Optionally, only one fan may be installed along the first direction x, suitable for indoor units with lower cooling and heating demands, or multiple fans may be installed, suitable for indoor units with higher cooling and heating demands. Optionally, the shapes of the first opening 10, the second opening 20, and the third opening 30 may be rectangular, elliptical, circular, or any other shape.

[0060] Optionally, the third opening 30 can be provided on only one of the two side plates 13, or the third opening 30 can be provided on both side plates 13, so that the third opening 30 on both sides is opposite to the air inlet 220 on both sides of the fan along the first direction x, so that the return air after heat exchange can enter the fan to increase the air volume and make the room temperature reach the set temperature faster.

[0061] Optionally, a rotating assembly for driving the moving volute 22 to rotate can be provided between the moving volute 22 and the fixed volute 21. For example, the rotating assembly may include an arc-shaped rack disposed on the outer wall of the moving volute 22 and a gear disposed on the inner side of the fixed volute 21, and the rotation of the moving volute 22 is achieved through the meshing transmission between the gear and the arc-shaped rack.

[0062] In this embodiment, the indoor unit of the air conditioner is rotatably mounted inside the fixed volute 21 via a movable volute 22, enabling the indoor unit to switch between an upward air outlet in cooling mode and a downward air outlet 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 providing a first opening 10 for cooling mode air outlet on the top plate 11 and a second opening 20 for heating mode air outlet on the bottom plate 12, the height difference of the indoor unit casing can be fully utilized, increasing the uniformity of the distribution of cold and hot airflow during indoor movement. A third opening 30 for return air is provided on the side plate 13, which can fully utilize the internal space of the indoor unit casing 1 and improve the uniformity of the return airflow before entering the air inlet 220. By providing air outlets on the top plate 11 and bottom plate 12 respectively to achieve upward and downward air outlets, there is no need to forcibly guide the airflow at the fan outlet, reducing airflow impact loss.

[0063] In some embodiments, such as Figures 3 to 8 As shown, the fixed volute 21 includes an upper air outlet 211 and a lower air outlet 212. The upper air outlet 211 is connected to the first opening 10, and the lower air outlet 212 is connected to the second opening 20.

[0064] In the upper air outlet state, the air inlet 220 is connected to the upper air outlet 211 to form a first air outlet duct for air outlet in cooling mode; in the lower air outlet state, the air inlet 220 is connected to the lower air outlet 212 to form a second air outlet duct for air outlet in heating mode.

[0065] Specifically, a first connecting section is provided between the upper air outlet 211 of the fixed volute 21 and the first opening 10 of the top plate 11, and a second connecting section is provided between the lower air outlet 212 of the fixed volute 21 and the second opening 20 of the bottom plate 12. The size of the first opening 10 is larger than the size of the upper air outlet 211, and the size of the second opening 20 is larger than the size of the lower air outlet 212. That is, both the first connecting section and the second connecting section are gradually expanding pipe sections, which can increase the smoothness of air outlet of the indoor unit of the air conditioner.

[0066] Specifically, the side edges of the first and second connecting sections are straight, so that the direction of the cold airflow from the first opening 10 is consistent with the direction of the cold airflow from the upper air outlet 211, and the direction of the hot airflow from the second opening 20 is consistent with the direction of the hot airflow from the lower air outlet 212. Optionally, due to the orientation of the upper air outlet 211, an arc-shaped guide section can be provided on the side of the first connecting section near the front panel 14, which is beneficial to make the cold airflow from the first opening 10 exit in a direction that is as horizontal as possible.

[0067] In this embodiment, the air inlet 220 is connected to the upper air outlet 211 and the lower air outlet 212 of the fixed volute 21, so that the fan forms a first air outlet duct for cooling mode and a second air outlet duct for heating mode. This enables the indoor unit of the air conditioner to switch between the upper air outlet state in cooling mode and the lower air outlet state in heating mode, realizing the upward blowing of cold air and the downward blowing of hot air, thereby optimizing the cooling and heating effect and improving user comfort.

[0068] In some embodiments, such as Figures 1 to 9 As shown, the housing 1 also includes a front plate 14 and a rear plate 15 that are opposite to each other and spaced apart along the second direction y. The second direction y is perpendicular to the first direction x. The upper air outlet 211 is located along the second direction y on the side of the lower air outlet 212 away from the rear plate 15.

[0069] In this embodiment, the upper air outlet 211 is located on the side of the lower air outlet 212 away from the rear plate 15. This allows for the full utilization of the space inside the housing 1 to arrange the fan, enabling the lower air outlet 212 to discharge air downwards and forwards, while the upper air outlet 211 tends to discharge air upwards and forwards, thereby optimizing the air discharge direction of the first opening 10 and the second opening 20.

[0070] In some embodiments, the acute angle between the air outlet direction of the lower air outlet 212 and the horizontal plane is 60° to 70°.

[0071] This embodiment limits the angle between the air outlet 212 and the horizontal plane, making the angle close to the empirical value for optimizing the heating effect. This allows the hot air to be discharged at a better angle, further optimizing the heating effect of the indoor unit of the air conditioner.

[0072] In some embodiments, such as Figures 4 to 9 As shown, both side panels 13 are provided with a third opening 30, and the indoor unit of the air conditioner also includes:

[0073] The heat exchanger 3 includes a first heat exchange plate 31 and a second heat exchange plate 32. The first heat exchange plate 31 is disposed between one of the side plates 13 and the fan closest to the side plate 13, and the second heat exchange plate 32 is disposed between the other side plate 13 and the fan closest to the side plate 13.

[0074] In this embodiment, both side plates 13 are provided with a third opening 30, and the first heat exchange plate 31 and the second heat exchange plate 32 sandwich the fan in the middle along the first direction x, so that the return air entering from the third opening 30 on both sides of the air conditioner indoor unit can be smoothly heat-exchanged before entering the fan, thereby improving the return air volume and the uniformity of the return airflow before entering the air inlet 220.

[0075] In some embodiments, such as Figure 4 and Figure 5 As shown, the housing 1 also includes a front plate 14 and a rear plate 15 that are opposite to and spaced apart along the second direction y. The heat exchanger 3 also includes a third heat exchange plate 33, which is connected between the first heat exchange plate 31 and the second heat exchange plate 32. The third heat exchange plate 33 is located between the fan and the front plate 14 along the second direction y, which is perpendicular to the first direction x.

[0076] Specifically, the first heat exchange plate 31, the second heat exchange plate 32 and the third heat exchange plate 33 are connected to form a U-shaped structure that surrounds the fan, which can increase the contact area between the return airflow and the heat exchanger 3.

[0077] Optionally, the first heat exchange plate 31, the second heat exchange plate 32, and the third heat exchange plate 33 can be straight plates, curved plates, or heat exchange plates of other shapes. When each heat exchange plate is a straight plate, the plane containing the first heat exchange plate 31 and the second heat exchange plate 32 can be perpendicular to the first direction x, or it can form an angle with the first direction x. The third heat exchange plate 33 can extend along the first direction x, or it can form an angle with the first direction x.

[0078] In this embodiment, the third heat exchange plate 33 is connected between the first heat exchange plate 31 and the second heat exchange plate 32, so that the heat exchanger 3 forms a U-shaped structure that surrounds the fan on three sides. This increases the contact area between the return airflow and the heat exchanger 3, enhances the heat exchange effect between the return airflow and the heat exchanger 3, and thus optimizes the cooling and heating effect.

[0079] In some embodiments, such as Figure 7 and Figure 9 As shown, the third heat exchange plate 33 and the front plate 14 are spaced apart along the second direction y so that an airflow channel is formed between the third heat exchange plate 33 and the front plate 14.

[0080] Optionally, an arc-shaped heat exchange plate 34 can be connected between the first heat exchange plate 31 and the third heat exchange plate 33, and an arc-shaped heat exchange plate 34 can also be connected between the second heat exchange plate 32 and the third heat exchange plate 33. The arc-shaped heat exchange plate 34 can make the return airflow flow more smoothly into the airflow channel, and the distribution of the return airflow in the airflow channel is more uniform, so as to increase the contact area between the return airflow and the third heat exchange plate 33, and make full use of the third heat exchange plate 33 for heat exchange, especially when multiple fans are spaced apart along the first direction x, because at least part of the air inlet 220 is located in the housing along the first direction x near the center.

[0081] This embodiment forms an airflow channel between the third heat exchange plate 33 and the front plate 14, so that a portion of the return airflow entering from the third opening 30 is diverted to the airflow channel, and then enters the air inlet 220 after exchanging heat with the third heat exchange plate 33. This can improve the heat exchange efficiency and heat exchange effect, and optimize the cooling and heating effect.

[0082] In some embodiments, the front panel 14 is provided with a fourth opening for return air.

[0083] This embodiment provides return air vents on both side plates 13 and front plate 14 to form a three-sided return air system, which can increase the return air volume. The three-sided return air system, combined with a U-shaped heat exchanger, can further enhance the heat exchange effect between the return airflow and the heat exchanger 3, making the heat exchange of the heat exchanger 3 more uniform and increasing the return air volume.

[0084] In some embodiments, when there are two centrifugal fans along the first direction x, the air inlet in the middle of the two centrifugal fans can be blocked, and air can only be introduced through the two outer air inlets, which is equivalent to forming a centrifugal fan with a longer overall length. At this time, a thinner third heat exchange plate 33 can be set, or the third heat exchange plate 33 can be omitted and only the first heat exchange plate 31 and the second heat exchange plate 32 can be set. The advantage of this structure is that while meeting the demand for a large amount of cooling and heating, the production cost of the third heat exchange plate 33 is saved, and the space reserved for the airflow channel between the third heat exchange plate 33 and the front plate 14 is saved, thereby reducing the thickness of the indoor unit of the air conditioner along the second direction y.

[0085] Optionally, without the third heat exchange plate 33, only the first heat exchange plate 31 and the second heat exchange plate 32 can be provided, or the first heat exchange plate 31, the second heat exchange plate 32 and the arc-shaped heat exchange plate 34 can be provided simultaneously to fully exchange heat with the return air entering the centrifugal fan through the third opening 30.

[0086] In some embodiments, such as Figure 5 As shown, the fan also includes centrifugal fan blades 23, and multiple fans are arranged at intervals along the first direction x. The indoor unit of the air conditioner also includes a drive component and a connector 4. The output end of the drive component is connected to the connector 4, and the connector 4 is connected between the centrifugal fan blades 23 of two adjacent fans.

[0087] Specifically, the drive component is configured to drive the centrifugal fan blades 23 to rotate, and the connector 4 is connected between the centrifugal fan blades 23 of two adjacent fans, enabling the drive component to transmit power from the drive component to the centrifugal fan blades 23 on both sides, so that the drive component can drive the centrifugal fan blades 23 of multiple fans to rotate synchronously. Optionally, the drive component can be a motor, etc.

[0088] In this embodiment, the drive component is connected to the centrifugal fan blades 23 of adjacent fans via connector 4, which can drive the centrifugal fan blades 23 of multiple fans to rotate synchronously, thereby saving energy, improving energy efficiency, and optimizing the airflow distribution inside the fan and the casing.

[0089] In some embodiments, the air inlet 220 is located on the central axis, and the third opening 30 and the air inlet 220 are positioned opposite each other.

[0090] Specifically, the central axis passes through the third opening 30 and the air inlet.

[0091] In this embodiment, the third opening 30 and the air inlet 220 are positioned opposite each other, which facilitates the return airflow to enter the air inlet 220 and improves the uniformity of the return airflow before it enters the air inlet 220.

[0092] In some embodiments, such as Figure 8 As shown, the housing 1 also includes a front plate 14 and a rear plate 15 that are opposite to each other and spaced apart along the second direction y. The second direction y is perpendicular to the first direction x. In the projection plane perpendicular to the first direction x, with the projection point of the central axis as the vertex of the included angle, the first line connecting the center of the upper air outlet 211 and the vertex of the included angle and the second line connecting the center of the lower air outlet 212 and the vertex of the included angle form a preset angle on the side facing the front plate 14. The range of the preset included angle is 130° to 180°.

[0093] Specifically, the midpoint of the two air outlets of the fixed volute 21 forms a preset angle α with the line connecting the center of the fan blade. Among the two lines forming the angle α, the slope of the second line is affected by the tilt angle of the lower air outlet 212 of the fixed volute. From an empirical perspective, the heating effect is better when the angle between the orientation of the lower air outlet 212 and the horizontal line is between 60° and 70°. Similarly, the slope of the first line is affected by the tilt angle of the upper air outlet 211 of the fixed volute. The cooling effect is better when the orientation of the upper air outlet 211 is close to horizontal. However, due to space limitations, the orientation of the upper air outlet 211 cannot be made horizontal. Therefore, the angle is adjusted as much as possible without interfering with the heat exchanger 3, so that the orientation of the upper air outlet 211 is shifted as close to the front plate 14 as possible, thereby optimizing the cooling effect.

[0094] This embodiment, by limiting the range of preset included angles, can optimize the orientation of the upper air outlet 211 and the lower air outlet 212 within a limited space, thereby improving the cooling and heating effects of the indoor unit of the air conditioner.

[0095] In some embodiments, the preset included angle ranges from 150° to 170°.

[0096] This embodiment further optimizes the orientation of the upper air outlet 211 and the lower air outlet 212 by further limiting the range of the preset included angle, thereby optimizing the cooling and heating effect.

[0097] In some embodiments,

[0098] The acute angle between the air outlet direction of the second opening 20 and the horizontal plane is 60° to 70°; and / or

[0099] The acute angle between the air outlet direction of the first opening 10 and the horizontal plane is no greater than 30°.

[0100] Optionally, the air outlet direction of the first opening 10 can be satisfied by sacrificing part of the area of ​​the heat exchanger 3, or by setting a baffle at the first opening 10.

[0101] This embodiment, by limiting the air outlet direction of the second opening 20, enables hot air to be delivered directly to the ground and diffuse outward horizontally, thus optimizing the heating effect; by limiting the air outlet direction of the first opening 10, it enables cold air to cover a larger indoor area after it is vented, thus optimizing the cooling effect.

[0102] In some embodiments, such as Figures 1 to 9 As shown, the top plate 11 includes a first guide plate 111, which is rotatable relative to the first opening 10;

[0103] When the indoor unit of the air conditioner is in the upward air outlet state, the first guide plate 111 tilts upward and opens relative to the first opening 10. When the indoor unit of the air conditioner is in the downward air outlet state or in the off state, the first guide plate 111 covers the first opening 10.

[0104] Specifically, after the first guide vane 111 is opened, it guides airflow forward and upward at an angle, that is, along the second direction y towards the front plate 14. Optionally, the hinge center line of the first guide vane 111 can be in the middle region of the first opening 10 or in the edge region of the first opening 10. Optionally, the angle between the second guide vane 112 and the top plate 11 in the open state can be no greater than 30°, so as to extend the horizontal airflow distance of the first opening 10.

[0105] This embodiment, by setting a first guide plate 111 that is rotatable relative to the first opening 10, can guide the cold air flowing out of the first opening 10 in the upward air outlet state, and close the first opening 10 in the downward air outlet state or the off state, thereby sealing the top plate 11 of the air conditioner indoor unit, preventing the return airflow from leaking out, and preventing dust and debris from falling into the first opening 10 when it is not in the air outlet state.

[0106] In some embodiments, such as Figure 2 and Figure 9 As shown, the housing 1 also includes a front plate 14 and a rear plate 15 that are opposite to each other and spaced apart along the second direction y. The first guide plate 111 is rotatably connected to the end of the first opening 10 away from the front plate 14 along the second direction y, and the second direction y is perpendicular to the first direction x.

[0107] This embodiment, by placing the first guide plate 111 on the side of the first opening 10 away from the front plate 14, can better correct the direction of cold airflow and optimize the cooling effect when the orientation of the upper air outlet 211 is restricted by the structure and deviates greatly from the horizontal plane.

[0108] In some embodiments, such as Figures 1 to 9 As shown, the base plate 12 includes a second guide plate 112, which is rotatable relative to the second opening 20.

[0109] When the indoor unit of the air conditioner is in the downward air outlet state, the second guide plate 112 tilts downward relative to the second opening 20 and opens. When the indoor unit of the air conditioner is in the upward air outlet state or in the off state, the second guide plate 112 covers the second opening 20.

[0110] Specifically, the hinge center line of the second guide plate 112 can be in the middle region of the second opening 20. Optionally, the airflow direction of the second guide plate 112 can be consistent with the airflow direction of the lower air outlet 212.

[0111] This embodiment, by setting a second guide plate 112 that is rotatable relative to the second opening 20, can guide the cold air flowing out of the second opening 20 in the upward air outlet state, and close the second opening 20 in the downward air outlet state or the off state, thereby sealing the bottom plate 12 of the air conditioner indoor unit and preventing the return airflow from leaking out.

[0112] In some embodiments, a grille is provided at the third opening 30, the grille being configured to allow return air to pass through the third opening 30 when the air conditioning indoor unit is on, and to close the third opening 30 when the air conditioning indoor unit is off.

[0113] Specifically, the grille is open in both the top and bottom air outlet states. Optionally, a filter screen is provided inside the grille.

[0114] This embodiment achieves the closure of the air conditioner indoor unit side panel 13 by setting a grille at the third opening and closing the third opening 30 when the unit is off. The grille can cooperate with the first guide plate 111 and the second guide plate 112 to achieve the overall closure of the housing 1.

[0115] Secondly, this disclosure proposes an air conditioning unit, including the indoor unit of the above embodiments.

[0116] The air conditioning unit in this embodiment switches between the upper air outlet state in cooling mode and the lower air outlet state in heating mode through the indoor unit, which can optimize the cooling and heating effect, improve user comfort, and improve energy efficiency.

[0117] 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 indoor unit for an air conditioner, characterized in that, include: The housing (1) includes a top plate (11), a bottom plate (12), and two side plates (13). The two side plates (13) are connected between the top plate (11) and the bottom plate (12) and are spaced apart relative to each other along a first direction (x). The top plate (11) has a first opening (10) for air outlet in cooling mode, the bottom plate (12) has a second opening (20) for air outlet in heating mode, and at least one of the side plates (13) has a third opening (30) for air return. The fan includes a volute assembly (2), which includes a fixed volute (21) and a movable volute (22). The movable volute (22) includes an air inlet (220) communicating with the third opening (30). The movable volute (22) is rotatably disposed within the fixed volute (21) about the central axis of the fan, 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 central axis extends along the first direction (x).

2. The indoor unit of the air conditioner according to claim 1, characterized in that, The fixed volute (21) includes an upper air outlet (211) and a lower air outlet (212). The upper air outlet (211) is connected to the first opening (10), and the lower air outlet (212) is connected to the second opening (20). In the upper air outlet state, the air inlet (220) is connected to the upper air outlet (211) to form a first air outlet duct for air outlet in the cooling mode; in the lower air outlet state, the air inlet (220) is connected to the lower air outlet (212) to form a second air outlet duct for air outlet in the heating mode.

3. The indoor unit of the air conditioner according to claim 2, characterized in that, The housing (1) further includes a front plate (14) and a rear plate (15) that are opposite to and spaced apart along a second direction (y), the second direction (y) being perpendicular to the first direction (x), and the upper air outlet (211) being located along the second direction (y) on the side of the lower air outlet (212) away from the rear plate (15).

4. The indoor unit of the air conditioner according to claim 2, characterized in that, The acute angle between the air outlet (212) and the horizontal plane is 60° to 70°.

5. The indoor unit of the air conditioner according to claim 1, characterized in that, The two side panels (13) are each provided with the third opening (30), and the indoor unit of the air conditioner also includes: The heat exchanger (3) includes a first heat exchange plate (31) and a second heat exchange plate (32). The first heat exchange plate (31) is disposed between one of the side plates (13) and the fan closest to the side plate (13), and the second heat exchange plate (32) is disposed between the other side plate (13) and the fan closest to the side plate (13).

6. The indoor unit of the air conditioner according to claim 5, characterized in that, The housing (1) further includes a front plate (14) and a rear plate (15) that are opposite to and spaced apart along a second direction (y). The heat exchanger (3) further includes a third heat exchange plate (33), which is connected between the first heat exchange plate (31) and the second heat exchange plate (32). The third heat exchange plate (33) is located between the fan and the front plate (14) along the second direction (y), which is perpendicular to the first direction (x).

7. The indoor unit of the air conditioner according to claim 6, characterized in that, The third heat exchange plate (33) and the front plate (14) are spaced apart along the second direction (y) so that an airflow channel is formed between the third heat exchange plate (33) and the front plate (14).

8. The indoor unit of the air conditioner according to claim 6, characterized in that, The front panel (14) is provided with a fourth opening for return air.

9. The indoor unit of the air conditioner according to claim 1, characterized in that, The fan also includes centrifugal fan blades (23), and multiple fans are arranged at intervals along the first direction (x). The indoor unit of the air conditioner also includes a drive component and a connector (4). The output end of the drive component is connected to the connector (4), and the connector (4) is connected between the centrifugal fan blades (23) of two adjacent fans.

10. The indoor unit of the air conditioner according to claim 1, characterized in that, The air inlet (220) is located on the central axis, and the third opening (30) and the air inlet (220) are positioned opposite each other.

11. The indoor unit of the air conditioner according to claim 2, characterized in that, The housing (1) further includes a front plate (14) and a rear plate (15) that are opposite to each other and spaced apart along a second direction (y). The second direction (y) is perpendicular to the first direction (x). In a projection plane perpendicular to the first direction (x), with the projection point of the central axis as the vertex of the included angle, the first line connecting the center of the upper air outlet (211) and the vertex of the included angle and the second line connecting the center of the lower air outlet (212) and the vertex of the included angle form a preset angle on the side facing the front plate (14). The range of the preset included angle is 130° to 180°.

12. The indoor unit of the air conditioner according to claim 11, characterized in that, The preset included angle ranges from 150° to 170°.

13. The indoor unit of the air conditioner according to claim 1, characterized in that, The acute angle between the air outlet direction of the second opening (20) and the horizontal plane is 60° to 70°; and / or The acute angle between the air outlet direction of the first opening (10) and the horizontal plane is no greater than 30°.

14. The indoor unit of the air conditioner according to any one of claims 1 to 13, characterized in that, The top plate (11) includes a first guide plate (111) which is rotatable relative to the first opening (10); When the indoor unit of the air conditioner is in the upward air outlet state, the first guide plate (111) is tilted upward relative to the first opening (10). When the indoor unit of the air conditioner is in the downward air outlet state or the off state, the first guide plate (111) covers the first opening (10).

15. The indoor unit of the air conditioner according to claim 14, characterized in that, The housing (1) further includes a front plate (14) and a rear plate (15) that are opposite to and spaced apart along a second direction (y). The first guide plate (111) is rotatably connected to one end of the first opening (10) that is away from the front plate (14) along the second direction (y). The second direction (y) is perpendicular to the first direction (x).

16. The indoor unit of an air conditioner according to any one of claims 1 to 13, characterized in that, The base plate (12) includes a second guide plate (112) which is rotatable relative to the second opening (20); When the indoor unit of the air conditioner is in the downward air outlet state, the second guide plate (112) is tilted downward relative to the second opening (20). When the indoor unit of the air conditioner is in the upward air outlet state or the off state, the second guide plate (112) covers the second opening (20).

17. The indoor unit of an air conditioner according to any one of claims 1 to 13, characterized in that, A grille is provided at the third opening (30), which is configured to allow return air to pass through the third opening (30) when the indoor air conditioning unit is turned on, and to close the third opening (30) when the indoor air conditioning unit is turned off.

18. An air conditioning unit, characterized in that, Includes the air conditioning indoor unit as described in any one of claims 1 to 17.

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