Air conditioner indoor unit and air conditioner unit

Abstract

The utility model relates to an air conditioner indoor unit and an air conditioning unit, the air conditioner indoor unit comprises an air duct assembly, the air duct assembly comprises a shell (1) provided with an air outlet, and an opening (17) is formed in the side, in the second direction (y), of the shell (1); the centrifugal fan (2) is located at the end in the shell (1) in the first direction (x), an outlet (21) of the centrifugal fan (2) is communicated with the air outlet, and the first direction (x) is perpendicular to the second direction (y); the heat exchanger (3) is mounted at the opening (17), and the windward side of the heat exchanger (3) faces the outside of the shell (1); wherein a ventilation opening is formed in the end, close to the centrifugal fan (2), of the shell (1) in the first direction (x), the ventilation opening is selectively in a closed state or an open state, and in the closed state, the air conditioner indoor unit independently works in a heat exchange mode; and in the opening state, external fresh air or purified indoor air is allowed to be introduced from the ventilation opening, and the air conditioner indoor unit has a circulation mode.

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, consumers have increasingly higher requirements for the air quality of air conditioning units. Conventional wall-mounted units often fail to meet users' demands for high-quality indoor air, including fresh air exchange and purification. Therefore, in addition to fulfilling basic cooling and heating functions, the market still needs a more expandable air conditioning system that can also provide fresh air exchange and purification capabilities. Utility Model Content

[0003] Embodiments of this disclosure provide an indoor air conditioning unit and an air conditioning system that can improve indoor air quality.

[0004] According to a first aspect of this disclosure, an air conditioning indoor unit is provided, including an air duct assembly, the air duct assembly comprising:

[0005] The housing has an air outlet, and the housing has an opening on one side along the second direction;

[0006] A centrifugal fan is located at the end of the casing along a first direction; the outlet of the centrifugal fan is connected to the air outlet; the first direction is perpendicular to a second direction.

[0007] The heat exchanger is installed at the opening, with the windward side of the heat exchanger facing outward from the shell.

[0008] The housing has a vent at the end near the centrifugal fan along the first direction. The vent can be selectively closed or open. In the closed state, the indoor unit operates in heat exchange mode alone. In the open state, fresh air from outside or purified indoor air is allowed to enter through the vent, and the indoor unit has a circulation mode.

[0009] In some embodiments, the device also includes a housing, an air duct assembly is disposed inside the housing, the housing is provided with a return air inlet, and the return air inlet is connected to the windward side of the heat exchanger.

[0010] When the vent is closed and the return air vent is open, the indoor unit of the air conditioner operates in heat exchange mode only; when the vent is open and the return air vent is closed, the indoor unit of the air conditioner operates in circulation mode only; when both the vent and the return air vent are open, the indoor unit of the air conditioner operates in both heat exchange mode and circulation mode simultaneously.

[0011] In some embodiments, the housing includes two end plates spaced apart along a first direction, a vent is opened on the end plates, and a cover plate is provided at the vent.

[0012] The indoor unit of the air conditioner also includes a first drive component configured to drive the cover plate to move so as to close the vent when it moves to a first position and open the vent when it moves to a second position.

[0013] In some embodiments, centrifugal fans are provided at both ends of the housing along the first direction, and ventilation openings are provided at both ends of the housing, one of which is used to introduce fresh outdoor air, and the other is used to introduce purified indoor air.

[0014] In some embodiments, a fresh air duct is also included, and the vent is connected to the outdoor environment through the fresh air duct.

[0015] In some embodiments, a purification component is further included, wherein end plates are respectively provided at both ends of the housing along the first direction, the purification component is disposed outside the end plates, and is configured to purify indoor air before it enters the vent.

[0016] In some embodiments, the purification component includes at least one of an electrostatic dust removal module and a plasma sterilization module.

[0017] In some embodiments, the centrifugal fan includes a centrifugal fan blade, the outer end of which is provided with a hub disk, and a plurality of flow holes are provided on the hub disk at intervals along the circumference of the centrifugal fan blade.

[0018] In some embodiments, the housing includes a rear plate spaced apart from the opening along a second direction, with the outlet facing the rear plate, and the inner sidewall of the rear plate having a flow guide structure configured to guide the airflow from the outlet to flow forward into the region.

[0019] In some embodiments, the flow guiding structure includes an arc-shaped wall and a flat wall. The arc-shaped wall extends forward from the rear plate, and the front end of the arc-shaped wall is located on the side away from the centrifugal fan along a first direction relative to the rear end. The arc-shaped wall is recessed inward. One end of the flat wall is connected to the front end of the arc-shaped wall, and the other end of the flat wall extends along a second direction to the front side of the housing along the second direction.

[0020] In some embodiments, centrifugal fans are provided at both ends of the housing along the first direction, and the flow guiding structure includes two arc-shaped walls and two planar walls. The two arc-shaped walls are symmetrically arranged with respect to the housing along a central plane perpendicular to the first direction, and the two planar walls are arranged adjacent to each other.

[0021] In some embodiments, the centrifugal fan includes centrifugal blades, the duct assembly further includes a second drive component, the flow guiding structure is provided with a cavity between two arc-shaped walls, the second drive component is disposed in the cavity, and the second drive component is configured to drive the two centrifugal blades to rotate synchronously.

[0022] In some embodiments, the housing includes a top plate, and an air outlet is disposed on the top plate. The air outlet includes a first air outlet and a second air outlet corresponding to the centrifugal fan. The first air outlet is disposed in an area outside the centrifugal fan along a first direction, and the second air outlet is located in the area where the centrifugal fan is located along the first direction.

[0023] In some embodiments, the housing includes a rear plate spaced apart from the opening along a second direction, the centrifugal fan includes centrifugal blades, the rear plate is provided with a volute tongue, the free end of the volute tongue extends upward along a third direction and extends away from the rear plate along the second direction, so that the outlet is located in the top region of the centrifugal blades and toward the rear plate, the third direction being perpendicular to the first and second directions.

[0024] In some embodiments, the diameter of the centrifugal fan blade is D, the width of the top air duct inside the housing along the second direction is W, and the volute tongue is arc-shaped with a central angle of α.

[0025] Wherein, W / D = 0.9 to 0.95, and / or α = 48° to 52°.

[0026] According to a second aspect of this disclosure, an air conditioning unit is proposed, including the indoor unit of the above-described embodiments.

[0027] Based on the above technical solution, the indoor unit of the air conditioner in this embodiment of the present disclosure has an openable and closable vent located at the end of the casing near the centrifugal fan along a first direction. When the vent is closed, the indoor unit operates solely in heat exchange mode. When the vent is open, fresh air from outside or purified indoor air can enter through the vent and exit through the outlet, enabling the indoor unit to achieve a circulation mode, in which case the heat exchange mode can be selectively operated. This type of indoor unit, while fulfilling basic heat exchange functions, can also cater to users' needs for fresh air exchange or air purification to improve indoor air quality, and is easily expandable in terms of functionality to better meet user needs. Attached Figure Description

[0028] 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:

[0029] Figure 1 This is a schematic diagram of the air duct assembly in some embodiments of the indoor unit of the air conditioner disclosed herein.

[0030] Figure 2 This is a cross-sectional view of the air duct structure in a horizontal plane in some embodiments of the indoor unit of the air conditioner disclosed herein.

[0031] Figure 3 for Figure 2 A schematic diagram of the gas flow direction of the indoor unit of an air conditioner in heat exchange mode.

[0032] Figure 4 This is a schematic diagram of the end of the air duct assembly in some embodiments of the indoor unit of the air conditioner disclosed herein.

[0033] Figure 5 This is a schematic diagram of the structure of some embodiments of the centrifugal fan blades in a centrifugal fan.

[0034] Figure 6 for Figure 4 A schematic diagram of gas flow direction in the air duct assembly shown.

[0035] Figure 7 This is a schematic diagram of some embodiments of the air duct assembly in the indoor unit of an air conditioner, where the two ends are respectively connected to a fresh air duct and a purification component.

[0036] Figure 8 for Figure 7 A schematic diagram of gas flow direction.

[0037] Explanation of reference numerals in the attached figures

[0038] 1. Shell; 11. Top plate; 12. Bottom plate; 13. Rear plate; 14. Front plate; 15. End plate; 16. Cover plate; 17. Opening; 10. First air outlet; 20. Second air outlet;

[0039] 2. Centrifugal fan; 21. Outlet; 22. Inlet; 23. Centrifugal fan blade; 231. Hub disc; 232. Flow hole; 24. Volute tongue; 25. Volute casing;

[0040] 3. Heat exchanger;

[0041] 4. Flow guiding structure; 41. Arc-shaped wall; 42. Planar wall; 43. Cavity;

[0042] 5. Second drive component;

[0043] 6. Fresh air duct;

[0044] 7. Purification components;

[0045] x, first direction; y, second direction; z, third direction. Detailed Implementation

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] First, this disclosure proposes an indoor unit for an air conditioner, such as Figures 1 to 8 As shown, in some embodiments, the indoor unit of the air conditioner includes a duct assembly, which includes:

[0053] The housing 1 is provided with an air outlet, and the housing 1 has an opening 17 on one side along the second direction y;

[0054] Centrifugal fan 2 is located at the end of the casing 1 along the first direction x. The outlet 21 of centrifugal fan 2 is connected to the air outlet. The first direction x is perpendicular to the second direction y.

[0055] Heat exchanger 3 is installed at opening 17, with the windward side of heat exchanger 3 facing outward from the shell 1;

[0056] The housing 1 has a vent at the end near the centrifugal fan 2 along the first direction x. The vent can be selectively closed or open. In the closed state, the indoor unit of the air conditioner operates in heat exchange mode alone. In the open state, fresh air from outside or purified indoor air is allowed to enter through the vent, and the indoor unit of the air conditioner has a circulation mode.

[0057] For example, the indoor unit of the air conditioner can be a wall-mounted unit. Specifically, the housing 1 includes a top plate 11 and a bottom plate 12 spaced apart along a third direction z (e.g., the height direction). The housing 1 may also include two end plates 15 spaced apart along a first direction x (e.g., the left-right direction), with the end plates 15 connecting the top plate 11 and the bottom plate 12. The centrifugal fan 2 is disposed near the inner side of the end plate 15. For example, the air outlet can be disposed on at least one of the top plate 11 and the bottom plate 12.

[0058] like Figure 4 As shown, the centrifugal fan 2 includes a volute assembly and a centrifugal fan blade 23. The volute assembly includes a volute 25 and a volute tongue 24. The volute 25 and the volute tongue 24 surround the centrifugal fan blade 23, and an outlet 21 is formed between them.

[0059] For example, the centrifugal fan blade 23 can be a forward-curved static pressure centrifugal fan blade. When the centrifugal fan blade 23 of the centrifugal fan 2 rotates, the gas flow direction is basically consistent with the rotation direction of the centrifugal fan blade 23, which allows the gas to be compressed and accelerated more effectively, thereby generating higher static pressure. Moreover, due to the higher static pressure, the gas can maintain a higher pressure when flowing out of the outlet 21, thereby obtaining greater kinetic energy at the outlet 21 and achieving a longer air delivery distance.

[0060] An opening 17 is provided on the front side of the shell 1, and the opening 17 is located in the middle region of the shell 1 along the first direction x. The remaining portions on both sides of the shell 1 serve as at least part of the front plate 14. The heat exchanger 3 may have a C-shaped structure, including two inclined heat exchange plates. The two inclined heat exchange plates are at an angle and connected by an arc-shaped heat exchange plate, with the angle facing inward towards the shell 1. This type of heat exchanger 3 is beneficial for increasing the heat exchange area.

[0061] The housing 1 has a vent at its end near the centrifugal fan 2 along the first direction x. The vent can be selectively closed or open. For example, when installing the indoor unit of the air conditioner, the end plate 15 can be installed according to user needs to keep the vent closed or open; or, during operation after the indoor unit of the air conditioner is installed, the vent can automatically switch between closed and open states. The heat exchange mode can include a cooling mode or a heating mode, and the circulation mode can include a fresh air mode or an indoor purification mode.

[0062] In this embodiment, the housing 1 has an openable and closable vent along the first direction x near the end of the centrifugal fan 2. When the vent is closed, the indoor unit operates solely in heat exchange mode. When the vent is open, fresh air from outside or purified indoor air can enter through the vent and exit through the outlet, enabling the indoor unit to operate in circulation mode. In this mode, the heat exchange mode can be selectively selected. This type of indoor unit, while fulfilling basic heat exchange functions, also caters to users' needs for fresh air exchange or air purification to improve indoor air quality. It is easy to expand its functionality to better meet user needs. Furthermore, this type of indoor unit does not require an additional fresh air fan, reducing its size; and it eliminates the need for additional fresh air outlets, ensuring uniform fresh air distribution and sufficient airflow.

[0063] In some embodiments, the indoor unit of the air conditioner also includes a casing, an air duct assembly is disposed inside the casing, the casing is provided with a return air inlet, and the return air inlet is connected to the windward side of the heat exchanger 3.

[0064] When the vent is closed and the return air vent is open, the indoor unit of the air conditioner operates in heat exchange mode only; when the vent is open and the return air vent is closed, the indoor unit of the air conditioner operates in circulation mode only; when both the vent and the return air vent are open, the indoor unit of the air conditioner operates in both heat exchange mode and circulation mode simultaneously.

[0065] Specifically, the return air inlet can be located on the front wall of the casing or other walls, as long as the airflow entering from the return air inlet can reach the windward side of the heat exchanger 3.

[0066] In this embodiment, when the vent is closed and the return air vent is open, the return air passes through the heat exchanger 3 and is drawn in through the inlet 22 inside the centrifugal fan 2. The indoor unit of the air conditioner operates in either cooling or heating mode. When the vent is open and the return air vent is closed, the return air cannot pass through the heat exchanger 3 to enter the centrifugal fan 2. Only outdoor fresh air or purified indoor air is drawn in through the inlet 22 outside the centrifugal fan 2 and flows out through the outlet. At this time, the indoor unit of the air conditioner operates in circulation mode to optimize indoor air quality. The circulating airflow in the duct does not pass through the heat exchanger, preventing fresh air from being secondary polluted when passing through the heat exchanger 3. When both the vent and the return air vent are open, the return air passes through the heat exchanger 3 and is drawn in through the inlet 22 inside the centrifugal fan 2. Outdoor fresh air or purified indoor air is drawn in through the inlet 22 outside the centrifugal fan 2. The inlets 22 on both sides of the centrifugal fan 2 simultaneously draw in air. The indoor unit of the air conditioner operates in both heat exchange and circulation modes simultaneously. This optimizes indoor air quality while cooling or heating, and also accelerates the airflow circulation efficiency in the duct, improving the user experience.

[0067] This type of air conditioner indoor unit can open and close through the ventilation port at the end of the casing 1 of the air duct assembly and the return air port on the casing, which can realize a variety of different working modes, flexibly meet the user's needs for cooling, heating or optimizing indoor air, and is easy to control.

[0068] In some embodiments, the housing 1 includes two end plates 15 spaced apart along a first direction x, a vent is opened on the end plate 15, and a cover plate 16 is provided at the vent.

[0069] The indoor unit of the air conditioner also includes a first drive component configured to drive the cover 16 to move so that the vent is closed when it moves to a first position and open when it moves to a second position.

[0070] The end plate 15 can be detachably installed using fasteners. For example, the first drive component can be located outside the end plate 15, and the cover plate 16 can close the vent when covering it and open it when leaving it. For example, the cover plate 16 can be movable; when opening the vent, the cover plate 16 can be moved to the outer circumference of the vent, or moved outward along the first direction x to expose the vent; or the cover plate 16 can be rotated; when opening the vent, the cover plate 16 can be rotated outward on one side with a rotating axis, or rotated within the plane of the cover plate 16 to expose the vent.

[0071] In this embodiment, the ventilation opening is provided on the end plate 15, and a cover plate 16 is provided at the ventilation opening. During use, the cover plate 16 can be automatically controlled by the first drive component to switch the ventilation opening between the open and closed states, so as to flexibly switch the indoor unit of the air conditioner to different working modes, and realize the independent heat exchange mode, independent circulation mode, and simultaneous operation of heat exchange mode and circulation mode.

[0072] Optionally, depending on user needs, end plate 15 or cover plate 16 can be installed during installation. For example, if the user only needs the indoor unit of the air conditioner to operate in heat exchange mode, end plate 15 and cover plate 16 can be installed; if the user has high requirements for indoor air quality, end plate 15 or cover plate 16 can be omitted so that the vents remain open and the indoor unit of the air conditioner can operate in heat exchange mode and circulation mode simultaneously.

[0073] In some embodiments, such as Figure 7 As shown, centrifugal fans 2 are provided at both ends of the housing 1 along the first direction x, and ventilation openings are provided at both ends of the housing 1. One ventilation opening is used to introduce outdoor fresh air, and the other ventilation opening is used to introduce purified indoor air.

[0074] In this embodiment, centrifugal fans 2 are installed at both ends of the casing 1 along the first direction x. In heat exchange mode, these fans can accelerate the airflow extraction rate, thereby improving the efficiency of heat exchange with indoor air. In circulation mode, one vent can be opened to introduce fresh outdoor air, replenishing oxygen, reducing harmful gases and odors, lowering the concentration of microorganisms and dust, and achieving natural ventilation; or the other vent can be opened to introduce purified indoor air for dust removal and sterilization; or both vents can be opened simultaneously to introduce fresh outdoor air and purified indoor air, effectively optimizing indoor air quality. Therefore, this type of indoor air conditioning unit can well meet user needs.

[0075] In some embodiments, such as Figure 7 As shown, the indoor unit of the air conditioner also includes a fresh air duct 6, and the vent is connected to the outdoor environment through the fresh air duct 6.

[0076] Preferably, the vent on the side of the housing 1 closest to the exterior wall along the first direction x is connected to the outdoor environment, which facilitates the introduction of fresh outdoor air and shortens the length of the fresh air duct 6. Alternatively, the fresh air duct 6 can also be connected to the vent on the other side, and the vent can be connected to the outdoor environment by setting a suitable extension path for the fresh air duct 6.

[0077] This embodiment connects a fresh air duct 6 to the vent, allowing outdoor fresh air to be conveniently introduced into the centrifugal fan 2 on the same side when the vent is open, so that the fresh air is circulated into the room through the air outlet, making the indoor air closer to natural wind.

[0078] In some embodiments, such as Figure 7 As shown, the indoor unit of the air conditioner also includes a purification component 7. The housing 1 has end plates 15 at both ends along the first direction x. The purification component 7 is located outside the end plates 15 and is configured to purify the indoor air before it enters the ventilation opening.

[0079] Preferably, the purification component 7 is installed at the vent on the side of the housing 1 away from the exterior wall along the first direction x, which makes it easier for indoor air to enter the housing 1 through the purification component 7. Optionally, the purification component 7 can also be installed at the vent on the side closer to the exterior wall.

[0080] This embodiment improves indoor air quality by installing a purification component 7 outside the end plate 15, allowing indoor air to be purified before entering the inlet 22 at the outer end of the centrifugal fan 2. This purification process removes dust and sterilizes the indoor air. Furthermore, placing the purification component 7 outside the end plate 15 avoids occupying the internal duct space of the housing 1 and does not affect the operation of the centrifugal fan 2.

[0081] In some embodiments, the purification component 7 includes at least one of an electrostatic dust removal module and a plasma sterilization module.

[0082] Depending on the purification requirements, the purification component 7 can also be equipped with modules that have other purification functions. Different purification modules can be stacked along the first direction x, or combined in the same plane.

[0083] In this embodiment, the purification component 7 is equipped with an electrostatic dust removal module, which uses the principle of electrostatic adsorption to remove particulate matter from the air. It also includes a plasma sterilization module, which destroys microbial structures and sterilizes the air, while removing odors and settling particulate matter to purify the air. Furthermore, by removing larger particles, dust, and microorganisms from the air before it enters the duct assembly, the burden on the filter in the indoor air conditioning unit is reduced, extending the replacement cycle. Compared to relying solely on the filter, this reduces the energy consumption of the centrifugal fan 2.

[0084] In some embodiments, such as Figure 5 As shown, the centrifugal fan 2 includes a centrifugal fan blade 23, and a hub disk 231 is provided at the outer end of the centrifugal fan blade 23. Multiple flow holes 232 are arranged at intervals along the circumference of the hub disk 231. For example, the multiple flow holes 232 are evenly arranged along the circumference.

[0085] This embodiment can introduce external fresh air or filtered indoor air more evenly by setting multiple flow holes 232 at circumferential intervals at the end of the centrifugal fan blade 23, and the formation of a hub between adjacent flow holes 232 can increase the strength of the centrifugal fan blade 23.

[0086] In some embodiments, such as Figure 2 and Figure 3 As shown, the housing 1 includes a rear plate 13 that is spaced apart from the opening 17 along the second direction y, and the outlet 21 faces the rear plate 13. The inner sidewall of the rear plate 13 is provided with a flow guide structure 4, which is configured to guide the airflow of the outlet 21 to flow forward into the region.

[0087] For example, centrifugal fans 2 are respectively installed at both ends of the housing 1 along the first direction x, and the flow guiding structure 4 is used to guide the outlet airflow of the centrifugal fans 2 on both sides to flow towards the middle area, and at the same time flow towards the front area along the second direction y, so that the centrifugal fans 2 can achieve corner air delivery.

[0088] In this embodiment, the centrifugal fan 2 takes in air along the first direction x and exits air through the outlet 21 in the second direction y. By setting the flow guide structure 4, the airflow from the outlet 21 to the outlet can flow towards the middle area in the first direction x, preventing the airflow from accumulating at the end area of ​​the housing 1, and making the airflow from the outlet along the first direction x more uniform. Moreover, the flow guide structure 4 can also guide the airflow to flow towards the front area while flowing towards the middle area in the first direction x, which facilitates the realization of positive wide-angle radiation airflow.

[0089] In some embodiments, such as Figure 2 As shown, the flow guiding structure 4 includes an arc-shaped wall 41 and a flat wall 42. The arc-shaped wall 41 extends forward from the rear plate 13, and the front end of the arc-shaped wall 41 is located on the side away from the centrifugal fan 2 along the first direction x relative to the rear end. The arc-shaped wall 41 is recessed inward. One end of the flat wall 42 is connected to the front end of the arc-shaped wall 41, and the other end of the flat wall 42 extends along the second direction y to the front side of the housing 1 along the second direction y.

[0090] This embodiment, by setting an arc-shaped wall 41, allows the airflow from the outlet 21 of the centrifugal fan 2 to flow towards the central region along the first direction x, while also flowing towards the forward region. By setting a flat wall 42 at the front end of the arc-shaped wall 41, the airflow can be further guided forward to achieve forward wide-angle air outlet. The forward direction mentioned here can be directly in front, above front, or below front.

[0091] In some embodiments, centrifugal fans 2 are provided at both ends of the housing 1 along the first direction x, and the flow guiding structure 4 includes two arc-shaped walls 41 and two planar walls 42. The two arc-shaped walls 41 are symmetrically arranged with respect to the housing 1 along a central plane perpendicular to the first direction x, and the two planar walls 42 are arranged adjacent to each other.

[0092] In this embodiment, arc-shaped walls 41 are provided on the inner sides of both centrifugal fans 2, which allows the airflow from the outlets 21 of each centrifugal fan 2 to flow towards the middle area along the first direction x, while also flowing towards the forward area. By providing a flat wall 42 at the front end of the arc-shaped wall 41, the airflow can be further guided forward to achieve forward wide-angle air outlet. Moreover, if the air outlets of the two centrifugal fans 2 are independent of each other, the two flat walls 42 can make the outlet airflow parallel, preventing the airflows of the corresponding air outlets of the two centrifugal fans 2 from affecting each other.

[0093] In some embodiments, such as Figure 2 As shown, the centrifugal fan 2 includes centrifugal fan blades 23, and the air duct assembly also includes a second drive component 5. The flow guiding structure 4 is located between two arc-shaped walls 41 and has a cavity 43. The second drive component 5 is located in the cavity 43 and is configured to drive the two centrifugal fan blades 23 to rotate synchronously.

[0094] For example, the second drive component 5 can be a motor or electric motor, etc.

[0095] This embodiment, by setting a second driving component 5 inside the cavity 43, can make full use of the space inside the guide structure 4, reduce the space occupation of the airflow channel, and drive the two centrifugal fan blades 23 to rotate synchronously.

[0096] In some embodiments, such as Figure 1 As shown, the housing 1 includes a top plate 11, and an air outlet is provided on the top plate 11. The air outlet includes a first air outlet 10 and a second air outlet 20 corresponding to the centrifugal fan 2. The first air outlet 10 is located in the area outside the centrifugal fan 2 along the first direction x, and the second air outlet 20 is located in the area where the centrifugal fan 2 is located along the first direction x.

[0097] Optionally, the air outlet can also be located on the base plate 12, or simultaneously on both the top plate 11 and the base plate 12. The first air outlet 10 can achieve upward airflow; to achieve upward front airflow, such as... Figure 4 As shown, an inclined or arc-shaped guide surface can be provided in the upper area of ​​the inner wall of the rear panel 13 to guide the airflow forward. A grille can be provided at the second air outlet 20.

[0098] like Figure 1 As shown, centrifugal fans 2 are provided at both ends of the housing 1 along the first direction x. Each centrifugal fan 2 is provided with a first air outlet 10 and a second air outlet 20. The two first air outlets 10 are independent of each other and are adjacent in the middle area of ​​the housing 1 along the first direction x.

[0099] This embodiment, by simultaneously setting a first air outlet 10 and a second air outlet 20 on the top plate 11, allows part of the airflow from the outlet 21 of the centrifugal fan 2 to flow directly out from the second air outlet 20, while another part of the airflow is guided by the guide structure 4 to flow out from the first air outlet 10. This can achieve a larger air outlet range in the first direction x, thereby improving air outlet efficiency and air outlet uniformity.

[0100] In some embodiments, the housing 1 includes a rear plate 13 spaced apart from the opening 17 along a second direction y, the centrifugal fan 2 includes centrifugal blades 23, and a volute 24 is provided on the rear plate 13. The free end of the volute 24 extends upward along a third direction z and extends away from the rear plate 13 along the second direction y, such that the outlet 21 is located in the top region of the centrifugal blades 23 and faces the rear plate 13, and the third direction z is perpendicular to the first direction x and the second direction y. For example, the volute 24 may be connected to the middle region of the rear plate 13 along the third direction z.

[0101] Figure 6 The diagram illustrates the airflow inside the volute assembly. The part below the volute tongue 24 is the upstream airflow, and the part near the outlet 21 is the downstream airflow. After the airflow flows out of the outlet 21, it enters the flow passage area with a triangular cross-section above the volute tongue 24, and then flows under the guidance of the flow guide structure 4.

[0102] In this embodiment, the volute tongue 24 is disposed on the rear plate 13, which allows the volute assembly to form an outlet 21 in the top area. When the air outlet is disposed on the top plate 11, the airflow of the outlet 21 can reach the air outlet with a shorter stroke, resulting in less airflow resistance and a larger stroke after airflow. Moreover, when the outlet air is disposed on the top plate 11 and covers the area where the centrifugal fan 2 is located, a better auxiliary airflow effect can also be achieved.

[0103] Alternatively, the volute tongue 24 may also be provided on the base plate 12 so that the outlet 21 is oriented toward the rear plate 13.

[0104] In some embodiments, such as Figure 6 As shown, the diameter of the centrifugal fan blade 23 is D, the width of the top air duct inside the casing 1 along the second direction y is W, and the volute tongue 24 is an arc with a central angle of α; wherein W / D = 0.9 to 0.95, and / or α = 48° to 52°, preferably α = 50°.

[0105] This embodiment takes into account that the structure of outlet 21 is a key factor affecting the efficiency of centrifugal fan 2. If the value of W is too small, the outlet will be too small, resulting in large flow loss. If the value of W is too large, the air cannot be effectively directed. By setting W / D within a reasonable range, the flow loss of centrifugal fan 2 at the outlet can be reduced while effectively controlling the air outlet direction.

[0106] The volute tongue 24, being arc-shaped, effectively guides airflow with minimal resistance. After the centrifugal fan 2 passes through the volute assembly, an excessively large diffuser opening can cause irregular convergence of upstream and downstream airflows, resulting in counter-current surge. A downstream air outlet duct is located at the dividing point of the volute tongue 24. If α is too small, upstream and downstream airflows easily converge, leading to surge; if α is too large, the volute tongue 24's coverage area on the centrifugal fan blade 23 becomes too large, resulting in excessive outlet resistance. Setting α within a reasonable range can suppress the disorderly convergence of upstream and downstream airflows, preventing surge and achieving low-resistance air delivery, effectively increasing the air volume of the centrifugal fan 2 and ensuring air delivery efficiency.

[0107] Secondly, this disclosure also provides an air conditioning unit, including the indoor unit of the above embodiments.

[0108] In this embodiment of the air conditioner, the indoor unit operates solely in heat exchange mode when the vent is closed. When the vent is open, fresh outdoor air or purified indoor air can enter through the vent and exit through the outlet, enabling the indoor unit to achieve a circulation mode. This air conditioning system, while fulfilling basic heat exchange functions, also caters to users' needs for improved indoor air quality, such as fresh air exchange or air purification. It is easily expandable to better meet user requirements.

[0109] 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, Includes an air duct assembly, the air duct assembly comprising: The housing (1) is provided with an air outlet, and the housing (1) is provided with an opening (17) on one side along the second direction (y); A centrifugal fan (2) is located at the end of the housing (1) along a first direction (x), and the outlet (21) of the centrifugal fan (2) is connected to the air outlet. The first direction (x) is perpendicular to the second direction (y). A heat exchanger (3) is installed in the opening (17), with the windward side of the heat exchanger (3) facing outward from the shell (1); The housing (1) has a vent at the end near the centrifugal fan (2) along the first direction (x). The vent can be selectively closed or open. In the closed state, the indoor air conditioning unit operates in heat exchange mode alone. In the open state, fresh air from outside or purified indoor air is allowed to enter through the vent. The indoor air conditioning unit has a circulation mode.

2. The indoor unit of the air conditioner according to claim 1, characterized in that, It also includes a housing, the air duct assembly is located inside the housing, the housing is provided with a return air inlet, and the return air inlet is connected to the windward side of the heat exchanger (3); When the vent is closed and the return air vent is open, the indoor unit of the air conditioner operates in the heat exchange mode alone; when the vent is open and the return air vent is closed, the indoor unit of the air conditioner operates in the circulation mode alone; when both the vent and the return air vent are open, the indoor unit of the air conditioner operates in both the heat exchange mode and the circulation mode simultaneously.

3. The indoor unit of the air conditioner according to claim 1, characterized in that, The housing (1) includes two end plates (15) spaced apart along a first direction (x), the vent is opened on the end plate (15), and the vent is provided with a cover plate (16); The indoor unit of the air conditioner also includes a first drive component configured to drive the cover plate (16) to move so that the vent is closed when it moves to a first position and open when it moves to a second position.

4. The indoor unit of the air conditioner according to claim 1, characterized in that, The housing (1) is provided with centrifugal fans (2) at both ends along the first direction (x), and the housing (1) is provided with vents at both ends, one of the vents being used to introduce fresh outdoor air and the other vent being used to introduce purified indoor air.

5. The indoor unit of the air conditioner according to claim 1, characterized in that, It also includes a fresh air duct (6), through which the vent is connected to the outdoor environment.

6. The indoor unit of the air conditioner according to claim 1, characterized in that, It also includes a purification component (7), wherein the housing (1) is provided with end plates (15) at both ends along the first direction (x), and the purification component (7) is disposed outside the end plates (15) and is configured to purify indoor air before it enters the vent.

7. The indoor unit of the air conditioner according to claim 6, characterized in that, The purification component (7) includes at least one of an electrostatic dust removal module and a plasma sterilization module.

8. The air conditioning indoor unit according to any one of claims 1 to 6, characterized in that, The centrifugal fan (2) includes a centrifugal fan blade (23), and a hub disk (231) is provided at the outer end of the centrifugal fan blade (23). Multiple flow holes (232) are provided on the hub disk (231) at intervals along the circumference of the centrifugal fan blade (23).

9. The air conditioning indoor unit according to any one of claims 1 to 6, characterized in that, The housing (1) includes a rear plate (13) spaced apart from the opening (17) along a second direction (y), the outlet (21) facing the rear plate (13), and the inner sidewall of the rear plate (13) is provided with a flow guide structure (4) configured to guide the airflow of the outlet (21) to flow forward into the region.

10. The indoor unit of the air conditioner according to claim 9, characterized in that, The flow guiding structure (4) includes an arc-shaped wall (41) and a planar wall (42). The arc-shaped wall (41) extends forward from the rear plate (13), and the front end of the arc-shaped wall (41) is located away from the centrifugal fan (2) along the first direction (x) relative to the rear end, and the arc-shaped wall (41) is recessed inward; one end of the flat wall (42) is connected to the front end of the arc-shaped wall (41), and the other end of the flat wall (42) extends along the second direction (y) to the front side of the housing (1) along the second direction (y).

11. The indoor unit of the air conditioner according to claim 10, characterized in that, The centrifugal fan (2) is provided at both ends of the housing (1) along the first direction (x). The flow guiding structure (4) includes two arc-shaped walls (41) and two planar walls (42). The two arc-shaped walls (41) are symmetrically arranged with respect to the housing (1) along the central plane perpendicular to the first direction (x), and the two planar walls (42) are arranged adjacent to each other.

12. The indoor unit of the air conditioner according to claim 11, characterized in that, The centrifugal fan (2) includes centrifugal fan blades (23), and the air duct assembly further includes a second drive component (5). The flow guiding structure (4) is provided with a cavity (43) between the two arc-shaped walls (41). The second drive component (5) is disposed in the cavity (43) and is configured to drive the two centrifugal fan blades (23) to rotate synchronously.

13. The air conditioning indoor unit according to any one of claims 1 to 6, characterized in that, The housing (1) includes a top plate (11), and the air outlet is provided on the top plate (11). The air outlet includes a first air outlet (10) and a second air outlet (20) corresponding to the centrifugal fan (2). The first air outlet (10) is located in the area outside the centrifugal fan (2) along the first direction (x), and the second air outlet (20) is located in the area where the centrifugal fan (2) is located along the first direction (x).

14. The indoor unit of the air conditioner according to claim 13, characterized in that, The housing (1) includes a rear plate (13) spaced apart from the opening (17) along a second direction (y). The centrifugal fan (2) includes a centrifugal fan blade (23). A volute (24) is provided on the rear plate (13). The free end of the volute (24) extends upward along a third direction (z) and extends away from the rear plate (13) along the second direction (y) so that the outlet (21) is located in the top region of the centrifugal fan blade (23) and faces the rear plate (13). The third direction (z) is perpendicular to the first direction (x) and the second direction (y).

15. The indoor unit of the air conditioner according to claim 14, characterized in that, The diameter of the centrifugal fan blade (23) is D, the width of the top air duct inside the housing (1) along the second direction (y) is W, and the volute tongue (24) is arc-shaped with a central angle of α. Wherein, W / D = 0.9 to 0.95, and / or α = 48° to 52°.

16. An air conditioning unit, characterized in that, Including the air conditioning indoor unit as described in claims 1 to 15.

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