Air conditioner indoor unit and air supply assembly thereof

Abstract

The application provides an air conditioner indoor unit and an air supply assembly thereof. The air supply assembly comprises: an air duct shell, a first air duct and a second air duct are formed in the air duct shell, the first air duct has a first air inlet and a first air outlet, the second air duct has a second air inlet and a second air outlet, and the second air outlet is communicated with the first air duct; a first air fan is arranged in the first air duct and is used for blowing the airflow from the first air inlet outwards through the first air outlet; and a second air fan is arranged in the second air duct and is used for making the airflow from the second air inlet at least partially enter the first air duct through the second air outlet. The application has the advantages that the air supply amount and the air supply distance can be simultaneously increased, the indoor temperature can be quickly and uniformly adjusted, and the use experience of the user can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of air conditioning technology, in particular to an air conditioner indoor unit and an air supply assembly thereof. BACKGROUND

[0002] With the increasing requirements for air conditioner comfort and performance, improving air volume and air supply experience has become a continuous problem to be solved in the field of air conditioners. Most of the current air conditioner indoor units use cross-flow fans. The advantage of cross-flow fans is that the air supply consistency is good along the length direction of the fan, but the air volume is limited and the air supply distance is short. When cooling the indoor environment, the cooling time is long and the cooling effect is uneven. SUMMARY

[0003] The present application aims to at least solve one of the above-mentioned defects in the prior art, and to provide an air conditioner indoor unit and an air supply assembly thereof.

[0004] A further object of the present application is to reduce the space occupation of the air supply assembly.

[0005] In particular, according to a first aspect of the present application, the present application provides an air supply assembly, comprising:

[0006] a duct housing, inside which a first air duct and a second air duct are formed, the first air duct having a first air inlet and a first air outlet, the second air duct having a second air inlet and a second air outlet, the second air outlet being in communication with the first air duct;

[0007] a first fan arranged in the first air duct for blowing air flow from the first air inlet outwards through the first air outlet; and

[0008] a second fan arranged in the second air duct for at least partially entering the first air duct through the second air outlet from the air flow from the second air inlet.

[0009] Optionally, the first air duct extends through the duct housing from back to front, the first air inlet is located at the back side of the first air duct, and the first air outlet is located at the front side of the first air duct.

[0010] The second air duct extends to the first air duct from bottom to top, the second air inlet is located at the back side of the second air duct, and the second air outlet is located at the top of the second air duct.

[0011] Optionally, the inside of the duct housing further forms a third air duct, the third air duct having a third air inlet and a third air outlet, the third air outlet being in communication with the first air duct;

[0012] The air supply assembly further comprises a third air blower arranged in the third air duct for blowing the air flow from the third air inlet at least partially to the first air duct through the third air outlet.

[0013] Optionally, the third air duct extends from bottom to top to the first air duct, the third air inlet is located at the back side of the third air duct, and the third air outlet is located at the top of the third air duct.

[0014] Optionally, the second air duct extends from the front bottom of the air duct shell to the first air duct, and the third air duct extends from the middle back of the air duct shell to the first air duct.

[0015] Optionally, the first air blower is an axial flow blower, the second air blower and the third air blower are centrifugal blowers, and the rotation shafts of the air blowers are arranged in the front-back direction of the air duct shell.

[0016] Optionally, the upper part of the first air duct is formed with a flow guide duct, and the outer periphery of the first air duct and the flow guide duct is a non-closed structure for blowing the air flow out of the second air outlet and not entering the first air duct outwards through the flow guide duct.

[0017] Optionally, the air duct shell comprises a first flow guide cover, and the first air duct is formed in the first flow guide cover.

[0018] The first flow guide cover has a plurality of first flow guide rings arranged in intervals from front to back and forming first ventilation intervals allowing air flow to enter the first air duct.

[0019] Optionally, the inner diameter of the first flow guide ring gradually increases from front to back, so that the first flow guide ring is gradually expanded from front to back.

[0020] Optionally, the flow guide duct extends through the air duct shell from back to front, the back side of the flow guide duct is formed with a flow guide air inlet, and the front side of the flow guide duct is formed with the flow guide air outlet.

[0021] Optionally, the air duct shell comprises a second flow guide cover, and the flow guide duct is formed in the second flow guide cover.

[0022] The second flow guide cover has a plurality of second flow guide rings arranged in intervals from front to back and forming second ventilation intervals allowing air flow to enter the flow guide duct.

[0023] Optionally, the inner diameter of the second flow guide ring gradually increases from front to back, so that the second flow guide ring is gradually expanded from front to back.

[0024] According to a second aspect of the present application, the present application provides an air conditioner indoor unit comprising the air supply assembly according to any one of the above.

[0025] The air supply assembly of the present application is provided with a first air duct and a second air duct, and the second air duct is in communication with the first air duct. During air supply, the airflow in the second air duct enters the first air duct from the second air outlet under the action of the second air fan, thereby increasing the air pressure at the first air outlet and improving the air supply distance of the first air outlet. Since the airflow entering the first air duct from the first air inlet and the second air outlet is blown out from the first air outlet, the air supply amount of the first air outlet is also increased, which is conducive to rapid adjustment of indoor temperature and improves the user experience.

[0026] Further, the air supply assembly of the present application is provided with a second air duct extending upward from the front bottom of the air duct shell and a third air duct extending upward from the middle of the rear side of the air duct shell. In this way, the second air fan and the third air fan can be selected as centrifugal fans, and the second air fan and the third air fan are installed in the second air duct and the third air duct in a staggered manner without increasing the internal space of the air duct shell, which is conducive to reducing the space occupation of the air supply assembly.

[0027] The above and other objects, advantages and features of the present application will become more apparent from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0028] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a better understanding of the preferred embodiments, and are not to be considered as restrictive of the application. Moreover, in the drawings, like reference numerals refer to similar components throughout the several views. In the drawings:

[0029] Figure 1 is a schematic structural view of an air supply assembly according to an embodiment of the present application;

[0030] Figure 2 is a schematic sectional view of an air supply assembly according to an embodiment of the present application;

[0031] Figure 3 is a schematic exploded view of an air supply assembly according to an embodiment of the present application;

[0032] Figure 4 is Figure 2 a schematic structural view of the first and second flow guide covers in

[0033] Figure 5 is a schematic structural view of an air conditioner indoor unit according to an embodiment of the present application;

[0034] Figure 6 is a schematic exploded view of an air conditioner indoor unit according to an embodiment of the present application.

[0035] Reference Signs:

[0036] 10, air conditioner indoor unit; 100, rear shell; 200, heat exchanger; 300, air supply assembly; 301, first air duct; 31a, first air inlet; 31b, first air outlet; 302, second air duct; 32a, second air inlet; 32b, second air outlet; 303, third air duct; 33a, third air inlet; 33b, third air outlet; 304, air guiding duct; 34a, air guiding inlet; 34b, air guiding outlet; 310, air duct shell; 311, air duct front cover; 312, air duct rear cover; 313, air duct middle cover; 314, first air guiding cover; 314a, first air guiding ring; 315, second air guiding cover; 315a, second air guiding ring; 320, first air fan; 330, second air fan; 340, third air fan. DETAILED DESCRIPTION

[0037] Reference will now be made in detail to embodiments of the application, one or more examples of which are illustrated in the drawings. Each example is provided by way of explanation of the application, not limitation of the application. In fact, various modifications and changes can be made within the scope or spirit of the application as demonstrated by the examples that follow. For example, the elements as described or illustrated in one embodiment can be used in another embodiment to produce yet another embodiment. Thus, these modifications and changes are intended to be included within the scope of the application as expressed in the following claims and their equivalents.

[0038] The air conditioner indoor unit 10 and its air supply assembly 300 according to an embodiment of the present application will be described below with reference to the accompanying drawings. In the description of the present embodiment, it should be understood that the term "a plurality of" means at least two, such as two, three, and the like. Unless specifically limited, the term "comprises" or "comprising" means that the element or elements following the term are included in the described implementation, but not excluding the presence of other elements or additional elements. Figures 1 to 6

[0039] In the description of the present embodiment, it should be understood that the term "a plurality of" means at least two, such as two, three, and the like. Unless specifically limited, the term "comprises" or "comprising" means that the element or elements following the term are included in the described implementation, but not excluding the presence of other elements or additional elements.

[0040] ​In the description of the present embodiments, the description of the terms "one embodiment", "some embodiments”, "some examples”, "one example” and the like means that the particular feature, structure, material or characteristic being described is included in at least one embodiment or example of the present application. The illustrative appearances of the above-mentioned terms in this specification are not necessarily the same. Moreover, the described particular features, structures, materials or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0041] In one aspect, the present application provides an air supply assembly 300, which can be applied to an air conditioner indoor unit 10, in particular a vertical air conditioner indoor unit 10.

[0042] Figure 1 is a schematic structural view of the air supply assembly 300 according to an embodiment of the present application, Figure 2 is a schematic sectional view of the air supply assembly 300 according to an embodiment of the present application, Figure 3 is a schematic exploded view of the air supply chamber according to an embodiment of the present application.

[0043] As shown in Figures 1 to 3 , the air supply assembly 300 of the present embodiment can include an air duct shell 310, a first air fan 320 and a second air fan 330.

[0044] The air duct shell 310 has a first air duct 301 and a second air duct 302 formed inside, the first air duct 301 has a first air inlet 31a and a first air outlet 31b, the second air duct 302 has a second air inlet 32a and a second air outlet 32b, the second air outlet 32b communicates with the first air duct 301. The first air fan 320 is arranged in the first air duct 301, for making the airflow from the first air inlet 31a blow outwards through the first air outlet 31b, the second air fan 330 is arranged in the second air duct 302, for making the airflow from the second air inlet 32a at least partially enter the first air duct 301 through the second air outlet 32b.

[0045] During the air supply process, under the action of the second air fan 330, the airflow in the second air duct 302 enters the first air duct 301 from the second air outlet 32b, which increases the air pressure at the first air outlet 31b, and improves the air supply distance of the first air outlet 31b. Since the airflow entering the first air duct 301 from the first air inlet 31a and the second air outlet 32b is blown outwards from the first air outlet 31b, the air supply amount of the first air outlet 31b is also increased, which is beneficial to realize the rapid adjustment of indoor temperature and improve the user's experience.

[0046] In one example, the first air duct 301 extends through the air duct housing 310 from back to front, the first air inlet 31a is located at the back side of the first air duct 301, and the first air outlet 31b is located at the front side of the first air duct 301. The second air duct 302 extends to the first air duct 301 from bottom to top, the second air inlet 32a is located at the back side of the second air duct 302, and the second air outlet 32b is located at the top of the second air duct 302. In this way, the second air blower 330 can blow air upward so that the air flow in the second air duct 302 is at least partially blown to the first air duct 301 through the second air outlet 32b.

[0047] In one optional embodiment, the air duct housing 310 further forms a third air duct 303, the third air duct 303 has a third air inlet 33a and a third air outlet 33b, and the third air outlet 33b is in communication with the first air duct 301. The air supply assembly 300 further comprises a third air blower 340 arranged in the third air duct 303 for blowing air flow from the third air inlet 33a to the first air duct 301 at least partially through the third air outlet 33b.

[0048] With the above scheme, the second air blower 330 and the third air blower 340 can be used to blow air flow to the first air duct 301 at the same time, which greatly improves the air pressure at the first air outlet 31b, and significantly improves the air supply amount and the air supply distance of the first air outlet 31b.

[0049] In one example, the third air duct 303 extends to the first air duct 301 from bottom to top, the third air inlet 33a is located at the back side of the third air duct 303, and the third air outlet 33b is located at the top of the third air duct 303. In this way, the third air blower 340 can also blow air upward so that the air flow in the third air duct 303 is at least partially blown to the first air duct 301 through the third air outlet 33b.

[0050] Preferably, the second air duct 302 extends to the first air duct 301 from the front side bottom of the air duct housing 310 upward, and the third air duct 303 extends to the first air duct 301 from the back side middle of the air duct housing 310 upward. That is, the second air duct 302 and the third air duct 303 are arranged side by side along the front-rear direction of the air duct housing 310, and the second air blower 330 and the third air blower 340 can supply air flow to the first air duct 301 independently in the respective air ducts.

[0051] In the embodiment shown in the drawings of the present application, the first air blower 320 is an axial flow blower, the second air blower 330 and the third air blower 340 are centrifugal blowers, and the rotation shafts of the respective blowers are arranged along the front-rear direction of the air duct housing 310. In this way, without increasing the internal space of the air duct housing 310, the second air blower 330 and the third air blower 340 can be installed in the second air duct 302 and the third air duct 303 in a staggered manner, which is conducive to reducing the space occupation of the air supply assembly 300.

[0052] It should be noted that if the second fan 330 and the third fan 340 are axial fans, the rotation shafts of the second fan 330 and the third fan 340 must be arranged along the height direction of the air duct shell 310, which will cause the thickness of the air duct shell 310 to suddenly increase in the front-rear direction.

[0053] It can be understood that since the flow direction of the airflow in the second air duct 302 is perpendicular to the flow direction of the airflow in the first air duct 301, if the airflow in the second air duct 302 is directly introduced into the first air duct 301 through the second air outlet 32b, it will hinder the flow of the airflow in the first air duct 301.

[0054] Therefore, in the embodiment of the present application, a flow guide air duct 304 is formed above the first air duct 301, and the outer periphery of the first air duct 301 and the flow guide air duct 304 is a non-closed structure, for making the airflow flowing out of the second air outlet 32b and not entering the first air duct 301 to blow outwards through the flow guide air duct 304.

[0055] In this way, part of the airflow flowing out of the second air outlet 32b can directly enter the first air duct 301 to increase the air pressure at the first air outlet 31b, and the remaining part of the airflow can bypass the first air duct 301, enter the flow guide air duct 304 from the outer periphery of the first air duct 301, and blow outwards from the flow guide air duct 304, so that the air outlet resistance can be reduced and the flow smoothness of the airflow can be improved.

[0056] In one example, referring to Figure 3 and Figure 4 The air duct shell 310 can include a first flow guide cover 314, and the first air duct 301 is formed in the first flow guide cover 314. The first flow guide cover 314 has a plurality of first flow guide rings 314a, and the plurality of first flow guide rings 314a are arranged in intervals from front to back and form first ventilation intervals allowing the airflow to enter the first air duct 301 between each other. In this way, part of the airflow flowing out of the second air outlet 32b can enter the first air duct 301 through the first ventilation interval.

[0057] Further, the inner diameter of the first flow guide ring 314a gradually increases from front to back, so that the first flow guide ring 314a is gradually expanded from front to back. Therefore, the first flow guide ring 314a can play a guiding role, so that the airflow at the second air outlet 32b enters the first air duct 301 obliquely upwards from back to front, which is beneficial to reduce the air inlet resistance.

[0058] In one example, the flow guide air duct 304 penetrates through the air duct shell 310 from back to front, the rear side of the flow guide air duct 304 is formed with a flow guide air inlet 34a, and the front side of the flow guide air duct 304 is formed with the flow guide air outlet 34b described above.

[0059] During the air supply process, the air flow that flows out of the second air outlet 32b and does not enter the first air duct 301 can enter the guide air duct 304 upwardly and then blow out of the guide air outlet 34b. During this period, the air flow at the rear side of the air supply assembly 300 can also enter the guide air duct 304 through the guide air inlet 34a and then blow out of the guide air outlet 34b. This is beneficial to balance the air pressure and improve the air supply stability of the air supply assembly 300.

[0060] In one example, the air duct shell 310 can further include a second guide cover 315, and the guide air duct 304 is formed in the second guide cover 315. The second guide cover 315 has a plurality of second guide rings 315a that are arranged in front-to-rear intervals and form second ventilation intervals between each other to allow air flow to enter the guide air duct 304. In this way, part of the air flow that flows out of the second air outlet can bypass the first air duct 301 and enter the guide air duct 304 through the second ventilation intervals.

[0061] Further, the inner diameter of the second guide ring 315a gradually increases from front to rear, so that the second guide ring 315a is gradually expanded from front to rear. In this way, the second guide ring 315a can play a guiding role, so that the air flow below can enter the guide air duct 304 upwardly from rear to front and then blow out of the guide air outlet 34b forwardly.

[0062] It should be noted that in the case where the third air duct 303 and the third air fan 340 are provided, part of the air flow blown out of the third air outlet 33b can enter the first air duct 301 through the first ventilation intervals between the first guide rings 314a, and the remaining part of the air flow can bypass the first air duct 301 and enter the guide air duct 304 through the second ventilation intervals between the second guide rings 315a.

[0063] In the embodiment shown in the drawings of the present application, the first air fan 320, the third air fan 340, and the second air fan 330 are distributed in a stepped manner from top to bottom and from rear to front. Among them, the first air fan 320 can partially extend into the first air duct 301 from the rear side at the first air inlet 31a, and the last first guide ring 314a of the first guide cover 314 abuts against the front side of the first air fan 320.

[0064] Considering that the third air fan 340 vertically upwardly supplies air, the first air fan 320 horizontally forwardly supplies air, and the distance between the third air fan 340 and the first air fan 320 is relatively close, this can cause the third air fan 340 to seriously hinder the smooth air supply of the first air fan 320.

[0065] In one example, the width (front-to-rear direction) of the last first guide ring 314a in the first guide cover 314 can be designed to be relatively large, and the inner diameter thereof can remain unchanged from front to rear. As shown in FIG. 6, the last first guide ring 314a can be designed to be wider than the first guide ring 314a in front of it, and the inner diameter of the last first guide ring 314a can be designed to be the same as the inner diameter of the first air fan 320. Figure 2As shown, the first guide ring 314a is located directly above the third air outlet 33b, and its width can be 3 / 4 of the width of the third air outlet 33b. In this way, under the obstruction of the last first guide ring 314a, most of the airflow flowing out of the third air outlet 33b can bypass the first air duct 301 from both sides and enter the diversion air duct 304, and then blow forward from the diversion air outlet 34b. A small portion of the airflow can enter the first air duct 301 from the first ventilation interval, and then blow forward from the first air outlet 31b.

[0066] In one example, the bottom of each of the second guide rings 315a of the second guide shroud 315 can be arched upwards, so that each of the second guide rings 315a is an arch with a closed bottom. In this way, the height of the air duct 304 can be reduced, thereby reducing the height of the air supply assembly 300, which helps to reduce the space occupied by the air supply assembly 300.

[0067] Furthermore, the radius of the second guide ring 315a is larger than the radius of the first guide ring 314a, the distance between adjacent second guide rings 315a is the same as the distance between adjacent first guide rings 314a, and the bottom of each second guide ring 315a is fixed to the top of each first guide ring 314a. In this way, the overall stability of the first guide shield 314 and the second guide shield 315 can be improved.

[0068] In an optional embodiment, the duct housing 310 includes a front duct cover 311, a rear duct cover 312, a middle duct cover 313, a first air guide 314, and a second air guide 315.

[0069] The front cover 311 and the rear cover 312 of the air duct are interlocked to form a cavity. The middle cover 313 of the air duct is U-shaped with its opening facing the front cover 311. It forms a third air duct 303 with the rear cover 312 of the air duct and a section of the second air duct 302 with the front cover 311 of the air duct.

[0070] The first guide shroud 314 and the second guide shroud 315 are both disposed within the receiving cavity. The second guide shroud 315 is located at the top of the receiving cavity and is used to form the aforementioned airflow duct 304. The first guide shroud 314 is located below the second guide shroud 315 and is used to form the aforementioned first airflow duct 301.

[0071] It should be noted that in this invention, the first fan 320, the second fan 330, and the third fan 340 can supply air individually or together.

[0072] like Figure 3 As shown by the middle arrow 1, when only the first fan 320 is supplying air, the main flow direction of the airflow is: first air inlet 31a → first air duct 301 → first air outlet 31b.

[0073] As Figure 3 As shown by arrow 2, when only the second fan 330 is running, the main flow direction of the air flow is second air inlet 32a→second air duct 302→second air outlet 32b→first air duct 301→first air outlet 31b, and second air inlet 32a→second air duct 302→second air outlet 32b→drainage air duct 304→drainage air outlet 34b.

[0074] As Figure 3 As shown by arrow 3, when only the third fan 340 is running, the main flow direction of the air flow is third air inlet 33a→third air duct 303→third air outlet 33b→first air duct 301→first air outlet 31b, and third air inlet 33a→third air duct 303→third air outlet 33b→drainage air duct 304→drainage air outlet 34b.

[0075] Another aspect of the present application provides an air conditioner indoor unit 10, Figure 5 is a schematic structural diagram of the air conditioner indoor unit 10 according to an embodiment of the present application, Figure 6 is a schematic exploded view of the air conditioner indoor unit 10 according to an embodiment of the present application. The air conditioner indoor unit 10 can include a front shell, a rear shell 100, a blowing assembly 300 and a heat exchanger 200, wherein, Figure 5 and Figure 6 The front shell of the air conditioner indoor unit 10 is omitted in the above.

[0076] As Figure 5 and Figure 6 As shown, the blowing assembly 300, the heat exchanger 200 and the rear shell 100 are arranged in sequence from back to front, and the rear shell 100 is provided with an air inlet grille extending along the height direction of the rear shell 100, and the top of the air inlet grille is lower than the drainage air duct 304. When each fan is running, indoor air can be heat exchanged with the heat exchanger 200 through the air inlet grille, and then enter the air duct through the corresponding air inlet.

[0077] According to any one of the above-mentioned optional embodiments or a combination of multiple optional embodiments, the embodiments of the present application can achieve the following beneficial effects:

[0078] The air supply assembly 300 of the embodiment of the present application, the first air duct 301 is provided with the first fan 320, the second air duct 302 is provided with the second fan 330, and the second air outlet 32b of the second air duct 302 is communicated with the first air duct 301. In the air supply process, under the action of the second fan 330, the airflow in the second air duct 302 enters the first air duct 301 from the second air outlet 32b, increases the air pressure at the first air outlet 31b, and can improve the air supply distance of the first air outlet 31b. Since the airflow entering the first air duct 301 from the first air inlet 31a and the second air outlet 32b is blown out from the first air outlet 31b, the air supply amount of the first air outlet 31b is also increased, which is beneficial to realize the rapid adjustment of indoor temperature and improve the user experience.

[0079] Further, the air supply assembly 300 of the embodiment of the present application, the second air duct 302 is arranged to extend upward from the front bottom of the air duct shell 310, and the third air duct 303 is arranged to extend upward from the middle of the rear side of the air duct shell 310. In this way, the second fan 330 and the third fan 340 can be selected as centrifugal fans, and the second fan 330 and the third fan 340 are installed in the second air duct 302 and the third air duct 303 in a staggered manner without increasing the internal space of the air duct shell 310, which is beneficial to reduce the space occupation of the air supply assembly 300.

[0080] At this point, those skilled in the art should recognize that although the present application has been shown and described in detail in the above embodiments, many other variations or modifications can be directly determined or deduced according to the disclosure of the present application without departing from the spirit and scope of the present application. Therefore, the scope of the present application should be understood and recognized as covering all these other variations or modifications.

Claims

1. An air supply assembly, comprising: The air duct shell has a first air duct and a second air duct inside. The first air duct has a first air inlet and a first air outlet, and the second air duct has a second air inlet and a second air outlet. The second air outlet is connected to the first air duct. The first fan is installed in the first air duct and is used to blow the airflow from the first air inlet out through the first air outlet. as well as A second fan is installed in the second air duct to allow airflow from the second air inlet to enter at least partially into the first air duct through the second air outlet; The first air duct runs through the air duct housing from back to front, the first air inlet is located on the rear side of the first air duct, and the first air outlet is located on the front side of the first air duct. The second air duct extends from bottom to top to the first air duct, the second air inlet is located at the rear of the second air duct, and the second air outlet is located at the top of the second air duct; A diversion duct is formed above the first air duct. The outer periphery of both the first air duct and the diversion duct is a non-enclosed structure, which is used to allow the airflow flowing out from the second air outlet and not entering the first air duct to be blown outward through the diversion duct. The air duct housing includes a first air guide shroud, and the first air duct is formed inside the first air guide shroud; The first air guide shroud has a plurality of first air guide rings, which are arranged at intervals from front to back and form a first ventilation interval between them that allows airflow to enter the first air duct.

2. The air supply assembly according to claim 1, wherein The interior of the air duct shell also forms a third air duct, which has a third air inlet and a third air outlet, and the third air outlet is connected to the first air duct. The air supply assembly also includes a third fan disposed in the third air duct, for blowing at least a portion of the airflow from the third air inlet to the first air duct through the third air outlet.

3. The air supply assembly according to claim 2, wherein... The third air duct extends from bottom to top to the first air duct, the third air inlet is located at the rear of the third air duct, and the third air outlet is located at the top of the third air duct.

4. The air supply assembly according to claim 3, wherein The second air duct extends upward from the bottom front side of the air duct housing to the first air duct, and the third air duct extends upward from the middle rear side of the air duct housing to the first air duct.

5. The air supply assembly according to claim 2, wherein... The first fan is an axial flow fan, the second fan and the third fan are centrifugal fans, and the rotating shafts of each fan are arranged along the front and rear direction of the air duct shell.

6. The air supply assembly according to claim 1, wherein... The inner diameter of the first guide ring gradually increases from front to back, making the first guide ring gradually expand from front to back.

7. The air supply assembly according to claim 6, wherein The air duct extends from back to front through the duct housing, with an air inlet formed on the rear side and an air outlet formed on the front side.

8. The air supply assembly according to claim 1, wherein The air duct housing includes a second air guide shroud, and the air duct is formed inside the second air guide shroud; The second air guide shroud has a plurality of second air guide rings, which are arranged at intervals from front to back, forming a second ventilation interval between them that allows airflow to enter the air duct.

9. The air supply assembly according to claim 8, wherein... The inner diameter of the second guide ring gradually increases from front to back, making the second guide ring gradually expand from front to back.

10. An indoor air conditioning unit comprising an air supply assembly according to any one of claims 1-9.

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