Air supply system, air conditioner and air supply control method

Abstract

The invention provides an air supply system, an air conditioner and an air supply control method. The air supply system comprises an air inlet cavity, a first cavity and a second cavity which are sequentially arranged in the thickness direction of the air conditioner and communicate with one another. The air duct assembly is arranged in the first cavity; the air duct assembly comprises an air duct part and a fan, and the fan is provided with a first side air inlet and a second side air inlet; the first side air inlet faces the air inlet cavity; the second side air inlet faces the second cavity; the one or more air duct assemblies comprise a first air duct assembly; a fourth opening is formed in the side wall, facing the air inlet cavity, of the air duct part of the first air duct assembly; and a fifth opening is formed in the side wall, facing the second cavity, of the air duct part of the first air duct assembly. And when the fourth opening and the fifth opening are both in the open state, the fourth opening communicates with the air inlet, so that part of airflow entering from the air inlet enters the air duct part of the first air duct assembly through the fourth opening, enters the second cavity through the fifth opening and then enters the fan through the second side air inlet.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to an air supply system, an air conditioner and an air supply control method. Background Art

[0002] Regarding reversible air conditioning, reversible air supply technology can realize large circulation of indoor air flow. At the same time, cooling and heating use the difference in air density to enhance the mixing of upper and lower air, reduce vertical temperature differences, and have better temperature uniformity and comfort.

[0003] In traditional air conditioning systems, all air must pass through the evaporator for cooling or heating before being delivered to the room by the fan. While effective, this design can, in certain circumstances, increase airflow resistance, thereby affecting overall airflow volume. For example, in hot weather, when the air conditioner requires a large amount of cooling, the resistance to airflow through the evaporator increases, affecting airflow and cooling efficiency, and even risking localized overcooling, impacting the user experience. Summary of the Invention

[0004] The main purpose of the present invention is to provide an air supply system, an air conditioner and an air supply control method, so as to realize switching between different air volume modes by forming a bypass.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, there is provided an air supply system, which is applied to an air conditioner, the air supply system comprising: an air inlet cavity, a first cavity and a second cavity which are sequentially arranged and connected along the thickness direction of the air conditioner; an air inlet which is connected to the air inlet cavity so that external air flows into the air inlet cavity through the air inlet; an air duct assembly which is arranged in the first cavity; the air duct assembly comprises an air duct portion and a fan which has a first side air inlet and a second side air inlet which are arranged along its axial direction, the axial direction of the fan being parallel to or the same as the thickness direction of the air conditioner; an outlet of the fan is connected to the air duct portion; the first side air inlet faces the air inlet cavity so as to be connected to the air inlet cavity; the second side air inlet faces Towards the second cavity to communicate with the second cavity; wherein, there are one or more air duct components, and the one or more air duct components include a first air duct component; a fourth opening is provided on the side wall of the air duct portion of the first air duct component facing the air inlet cavity, and the fourth opening can be opened and closed; a fifth opening is provided on the side wall of the air duct portion of the first air duct component facing the second cavity, and the fifth opening can be opened and closed; when the fourth opening and the fifth opening are both in an open state, the fourth opening is communicated with the air inlet, so that part of the airflow entering from the air inlet enters the air duct portion of the first air duct component through the fourth opening, enters the second cavity through the fifth opening, and then enters the fan through the second side air inlet.

[0006] Furthermore, the air supply system also includes: a first opening and closing component, which is arranged at the fourth opening to open or close the fourth opening through the first opening and closing component; and a second opening and closing component, which is arranged at the fifth opening to open or close the fifth opening through the second opening and closing component.

[0007] Furthermore, the first opening and closing component and / or the second opening and closing component is a first opening and closing mechanism; the preset opening is the fourth opening or the fifth opening; the first opening and closing mechanism includes a plurality of opening and closing parts, and the plurality of opening and closing parts are distributed in sequence along the preset direction of the preset opening, and each opening and closing part is rotatably arranged around a preset axis; the preset axes of the plurality of opening and closing parts are all parallel and perpendicular to the plane where the preset opening is located; when the first opening and closing mechanism is in a closed state, the plurality of opening and closing parts block the preset opening, so that the preset opening is in a closed state; when the first opening and closing mechanism is in an open state, there is a flow gap between any two adjacent opening and closing parts, so that the preset opening is in an open state.

[0008] Furthermore, the first opening and closing component and / or the second opening and closing component is a second opening and closing mechanism; the preset opening is the fourth opening or the fifth opening; the second opening and closing mechanism includes an opening and closing component and a driving assembly, and the driving assembly is connected to the opening and closing component to drive the opening and closing component to approach or move away from the preset opening, so that the opening and closing component blocks or avoids the preset opening, and then closes or opens the preset opening.

[0009] Furthermore, the driving assembly includes a driving member and an eccentric wheel; the driving member is connected to the eccentric wheel to drive the eccentric wheel to rotate; the rotation axis of the eccentric wheel is perpendicular to the movement direction of the opening and closing member; the outer peripheral surface of the eccentric wheel is used to abut against the opening and closing member.

[0010] Furthermore, the second opening and closing mechanism also includes an elastic member, which has a first end and a second end relatively arranged along its elastic expansion and contraction direction; the elastic expansion and contraction direction of the elastic member is parallel to or the same as the movement direction of the opening and closing member; the first end of the elastic member is connected to the opening and closing member, and the second end of the elastic member is fixedly connected.

[0011] Furthermore, the first cavity includes a yield cavity portion, so that a portion of the airflow entering the air inlet cavity directly enters the fan through the first side air inlet, and another portion of the airflow entering the air inlet cavity passes through the yield cavity portion into the second cavity, and then enters the fan through the second side air inlet.

[0012] Furthermore, there are two air duct assemblies, which are the first air duct assembly and the second air duct assembly respectively; the first air duct assembly is located on the side of the second air duct assembly close to the air inlet cavity; the fan of the first air duct assembly is the first fan, and the fan of the second air duct assembly is the second fan; the axial direction of the first fan is parallel to the axial direction of the second fan; the first fan and the second fan are spaced apart along the length direction of the air conditioner, so that the first cavity includes a yield cavity portion located between the first fan and the second fan, so that the other part of the air flow entering the air inlet cavity passes through the yield cavity portion into the second cavity, and then enters the first fan and the second fan through the second side air inlet of the first fan and the second side air inlet of the second fan respectively.

[0013] Furthermore, the air duct portion includes a first air duct section and a second air duct section; a first outlet and a second outlet are arranged on the outer peripheral surface of the fan at intervals along its circumferential direction; the first end of the first air duct section is its air outlet end, and the second end of the first air duct section is connected and communicated with the first outlet; the first end of the second air duct section is connected and communicated with the second outlet, and the second end of the second air duct section is its air outlet end; the fan includes a shielding member, which is movably arranged along the circumference of the fan to block the first outlet or the second outlet, thereby allowing the airflow in the fan to flow out from the first outlet or the second outlet; the fourth opening and the fifth opening are both opened on the side wall of the second air duct section of the first air duct assembly.

[0014] Furthermore, the air inlet chamber includes a main chamber section and a first chamber section that are interconnected. A heat exchanger is provided in the main chamber section so that the airflow entering the main chamber section exchanges heat with the heat exchanger and then flows out of the air inlet chamber; the first chamber section is arranged opposite to the air inlet so that the airflow flowing in from the air inlet flows through the first chamber section and the main chamber section in sequence; the fourth opening is connected to the air inlet through the first chamber section.

[0015] Furthermore, the fan is a centrifugal fan.

[0016] Furthermore, there are two air inlets, which are the first air inlet and the second air inlet spaced apart along the length direction of the air conditioner, so that the external air flow enters the air inlet cavity through the first air inlet and / or the second air inlet; when the fourth opening is in an open state, the fourth opening is connected to the second air inlet.

[0017] According to another aspect of the present invention, an air conditioner is provided, which includes the above-mentioned air supply system.

[0018] According to another aspect of the present invention, an air supply control method is provided, which is applicable to the above-mentioned air supply system or the above-mentioned air conditioner; the air supply system has a first air supply mode and a second air supply mode; when the air supply system executes the first air supply mode, the air supply control method includes: controlling the first air inlet of the air supply system to be in a closed state, and controlling the second air inlet of the air supply system to be in an open state, and controlling the second outlets of the fans of the two air duct components of the air supply system to be in a closed state, and controlling the first outlets of the fans of the two air duct components of the air supply system to be in an open state, and controlling the fourth opening and the fifth opening of the air supply system to be in a closed state or in an open state; when the air supply system executes the second air supply mode, the air supply control method includes: controlling the first air inlet of the air supply system to be in an open state, and controlling the second air inlet of the air supply system to be in a closed state, and controlling the second outlets of the fans of the two air duct components of the air supply system to be in an open state, and controlling the first outlets of the fans of the two air duct components of the air supply system to be in a closed state, and controlling the fourth opening and the fifth opening of the air supply system to be in a closed state.

[0019] Applying the technical solution of the present invention, the air supply system includes an air inlet cavity, a first cavity, and a second cavity, which are sequentially arranged and connected along the thickness direction of the air conditioner. The air supply system also includes an air inlet, which is connected to the air inlet cavity so that external airflow enters the air inlet cavity through the air inlet. The air supply system also includes an air duct assembly, which is arranged in the first cavity; the air duct assembly includes an air duct section and a fan, and the fan has a first side air inlet and a second side air inlet arranged along its axial direction, and the axial direction of the fan is parallel to or the same as the thickness direction of the air conditioner. The outlet of the fan is connected to the air duct section, that is, the air flow entering the fan flows out from the outlet of the fan, enters the air duct section, and then flows out from the air outlet of the air duct section. The first side air inlet faces the air inlet cavity to communicate with the air inlet cavity; the second side air inlet faces the second cavity to communicate with the second cavity.

[0020] There are one or more air duct assemblies, that is, there is at least one air duct assembly. The one or more air duct assemblies include a first air duct assembly. A fourth opening is provided on the side wall of the air duct portion of the first air duct assembly facing the air inlet cavity, and the fourth opening can be opened and closed; a fifth opening is provided on the side wall of the air duct portion of the first air duct assembly facing the second cavity, and the fifth opening can be opened and closed. When the fourth opening and the fifth opening are both in an open state, the fourth opening is connected to the air inlet, so that part of the airflow entering from the air inlet enters the air duct portion of the first air duct assembly through the fourth opening, and enters the second cavity through the fifth opening; this part of the airflow entering the second cavity enters the fan through the second side air inlet.

[0021] The present application forms a bypass by setting the fourth opening and the fifth opening, that is, the airflow bypass technology. By controlling the opening and closing of the fourth opening and the fifth opening, the switching of different air volume modes can be achieved.

[0022] The air supply system of the present application: 1. Provides a carrier for reversible air supply technology, which can realize large circulation of indoor air flow and better comfort; 2. Adopts a special bypass design, which can greatly increase the air volume when necessary, and solves the problems of large air inlet resistance and along-the-path resistance of existing reversible air supply air conditioners; 3. Controls the opening and closing of the shielding parts and the fourth and fifth openings according to actual needs to realize the switching of air supply mode and air volume mode, so as to realize multiple air supply modes, thereby meeting the needs of different scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0024] Figure 1 A schematic side view of an air supply system according to the present invention is shown;

[0025] Figure 2 Shown Figure 1 A schematic diagram of the structure of the fan of the air supply system;

[0026] Figure 3 A schematic diagram showing the gas flow direction when the air supply system according to the present invention is in the first air supply mode and the fourth opening and the fifth opening are both closed;

[0027] Figure 4 A schematic diagram showing the gas flow direction when the air supply system according to the present invention is in the first air supply mode and the fourth opening and the fifth opening are both in an open state;

[0028] Figure 5 A schematic diagram showing the gas flow direction when the air supply system according to the present invention is in the second air supply mode;

[0029] Figure 6 A schematic structural diagram of two air duct components and a clearance cavity portion of an air supply system according to the present invention is shown;

[0030] Figure 7 Shown Figure 6 Schematic diagram of the assembly structure of the two air duct components and the yield cavity portion of the air supply system;

[0031] Figure 8 It shows a structural schematic diagram of the first air duct assembly when the air supply system according to the present invention is in the first air supply mode;

[0032] Figure 9 It shows a structural schematic diagram of the second air duct assembly when the air supply system according to the present invention is in the first air supply mode;

[0033] Figure 10It shows a structural schematic diagram of the first air duct assembly when the air supply system according to the present invention is in the second air supply mode;

[0034] Figure 11 It shows a structural schematic diagram of the second air duct assembly when the air supply system according to the present invention is in the second air supply mode;

[0035] Figure 12 It shows a structural schematic diagram of the second opening and closing mechanism of the air supply system according to the present invention;

[0036] Figure 13 A schematic diagram showing the relative positions of the eccentric wheel and the opening and closing member when the second opening and closing mechanism of the air supply system according to the present invention is in a closed state;

[0037] Figure 14 A schematic diagram showing the relative positions of the eccentric wheel and the opening and closing member when the second opening and closing mechanism of the air supply system according to the present invention is in the open state;

[0038] Figure 15 A schematic structural diagram showing that the second opening and closing component of the air supply system according to the present invention is a second opening and closing mechanism, and the second opening and closing mechanism is installed in the first cavity;

[0039] Figure 16 Shown Figure 15 A front view of the second opening and closing mechanism;

[0040] Figure 17 Shown Figure 15 a side view of the opening and closing member of the second opening and closing mechanism;

[0041] Figure 18 An exploded structural diagram of the air inlet cavity, two air duct assemblies, a heat exchanger, at least a portion of the first cavity, and at least a portion of the second cavity of the air supply system according to the present invention is shown;

[0042] Figure 19 Shown Figure 18 Schematic diagram of the assembly structure of the air inlet cavity, two air duct components, and heat exchanger;

[0043] Figure 20 It shows the airflow bypass design principle diagram of the air supply system according to the present invention;

[0044] Figure 21 A comparison diagram of pipe resistance characteristics of a conventional solution and a high air volume solution when the air supply system according to the present invention is in the first air supply mode is shown.

[0045] The above drawings include the following reference numerals:

[0046] 10. Air inlet cavity; 101. Main cavity section; 102. Second cavity section; 103. Third cavity section;

[0047] 11. First air inlet; 12. Second air inlet;

[0048] 20, first cavity; 201, first cavity portion; 202, second cavity portion; 21, yield cavity portion;

[0049] 30. Second cavity; 301. Third cavity portion;

[0050] 40. Air duct assembly; 401. First air duct assembly; 4011. First opening; 4012. Fourth opening; 4013. Fifth opening; 4014. Sixth opening; 4015. Preset air duct section;

[0051] 402, second air duct assembly; 4021, second opening; 4022, third opening; 4023, seventh opening;

[0052] 41. Air duct section; 411. First air duct section; 412. Second air duct section;

[0053] 42. Fan; 4201. First fan; 4202. Second fan; 421. First side air inlet; 422. Second side air inlet; 423. First outlet; 424. Second outlet; 425. Shielding member;

[0054] 50. Heat exchanger; 62. Back panel;

[0055] 71. First opening and closing member; 72. Second opening and closing member;

[0056] 81. First opening and closing mechanism; 811. Opening and closing portion;

[0057] 82. Second opening and closing mechanism; 821. Opening and closing member; 822. Driving member; 823. Eccentric wheel; 824. Elastic member. DETAILED DESCRIPTION

[0058] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0059] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present application belongs.

[0060] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0061] The present invention provides an air supply system for an air conditioner. Figures 1 to 5 The air supply system includes an air inlet cavity 10, a first cavity 20 and a second cavity 30 which are sequentially arranged and connected along the thickness direction of the air conditioner.

[0062] The air supply system further includes an air inlet, which is communicated with the air inlet cavity 10 so that external air flows into the air inlet cavity 10 through the air inlet.

[0063] The air supply system also includes an air duct assembly 40, which is arranged in the first cavity 20; the air duct assembly 40 includes an air duct portion 41 and a fan 42, the fan 42 has a first side air inlet 421 and a second side air inlet 422 arranged along its axial direction, and the axial direction of the fan 42 is parallel to or the same as the thickness direction of the air conditioner.

[0064] The outlet of the fan 42 is connected to the air duct portion 41 , that is, the air flow entering the fan 42 flows out from the outlet of the fan 42 , enters the air duct portion 41 , and then flows out from the air outlet of the air duct portion 41 .

[0065] The first side air inlet 421 faces the air inlet cavity 10 to communicate with the air inlet cavity 10 ; the second side air inlet 422 faces the second cavity 30 to communicate with the second cavity 30 .

[0066] There are one or more air duct components 40 , that is, there is at least one air duct component 40 . The one or more air duct components 40 include a first air duct component 401 .

[0067] A fourth opening 4012 is provided on the side wall of the air duct portion 41 of the first air duct assembly 401 facing the air inlet cavity 10, and the fourth opening 4012 can be opened and closed; a fifth opening 4013 is provided on the side wall of the air duct portion 41 of the first air duct assembly 401 facing the second cavity 30, and the fifth opening 4013 can be opened and closed.

[0068] When the fourth opening 4012 and the fifth opening 4013 are both in an open state, the fourth opening 4012 is connected to the air inlet, so that part of the airflow entering from the air inlet enters the air duct portion 41 of the first air duct assembly 401 through the fourth opening 4012, and enters the second cavity 30 through the fifth opening 4013; this part of the airflow entering the second cavity 30 enters the fan 42 through the second side air inlet 422.

[0069] It should be noted that in the air duct portion 41 of the first air duct assembly 401, the air duct section where the fourth opening 4012 and the fifth opening 4013 are located is the preset air duct section 4015. That is, the air duct portion 41 of the first air duct assembly 401 includes the preset air duct section 4015. When the preset air duct section 4015 is used for air discharge, the fourth opening 4012 and the fifth opening 4013 are both closed. In other words, when the fourth opening 4012 and the fifth opening 4013 are both open, the preset air duct section 4015 is necessarily not used for air discharge.

[0070] Specifically, the first cavity 20 includes a communication cavity portion, and the fifth opening 4013 is communicated with the communication cavity portion, so that the fifth opening 4013 is communicated with the second cavity 30 through the communication cavity portion.

[0071] The present application forms a bypass through the arrangement of the fourth opening 4012 and the fifth opening 4013, i.e., airflow bypass technology. By controlling the opening and closing of the fourth opening 4012 and the fifth opening 4013, switching between different air volume modes is achieved.

[0072] In the present application, the first side air inlet 421 faces the air inlet cavity 10, allowing the first side air inlet 421 to communicate with the air inlet cavity 10. This allows a portion of the airflow entering the air inlet cavity 10 to directly enter the fan 42 through the first side air inlet 421. The second side air inlet 422 faces the second cavity 30, allowing the second side air inlet 422 to communicate with the second cavity 30. Furthermore, the first cavity 20 includes a clearance cavity portion 21, allowing another portion of the airflow entering the air inlet cavity 10 to pass through the clearance cavity portion 21 into the second cavity 30, and then enter the fan 42 through the second side air inlet 422. This increases the air volume entering the fan 42, thereby improving the air volume of the air conditioner.

[0073] Specifically, when the fourth opening 4012 and the fifth opening 4013 are both in a closed state, the external airflow enters the air inlet cavity 10 through the air inlet, and the airflow entering the air inlet cavity 10 is divided into two parts, namely, the first part of the airflow and the second part of the airflow; the first part of the airflow directly enters the fan 42 through the first side air inlet 421; the second part of the airflow enters the second cavity 30 through the yield cavity portion 21, and then enters the fan 42 through the second side air inlet 422.

[0074] Specifically, when the fourth opening 4012 and the fifth opening 4013 are both open, the external airflow entering from the air inlet is divided into two parts, namely the fifth airflow and the sixth airflow. The fifth airflow enters the air duct portion 41 of the first air duct assembly 401 through the fourth opening 4012 and enters the second cavity 30 through the fifth opening 4013. The sixth airflow enters the main cavity section 101 of the air inlet cavity 10. The sixth airflow is divided into two parts, namely the first airflow and the second airflow. The first airflow directly enters the fan 42 through the first side air inlet 421; the second airflow enters the second cavity 30 through the yield cavity portion 21. The airflow entering the second cavity 30 enters the fan 42 through the second side air inlet 422.

[0075] In the present application, there are two air duct assemblies 40, and the two air duct assemblies 40 are distributed along the thickness direction of the air conditioner; the two air duct assemblies 40 are the first air duct assembly 401 and the second air duct assembly 402; the first air duct assembly 401 is located on the side of the second air duct assembly 402 close to the air inlet cavity 10.

[0076] The fan 42 of the first air duct assembly 401 is a first fan 4201 , and the fan 42 of the second air duct assembly 402 is a second fan 4202 .

[0077] like Figure 6 and Figure 7 As shown, the axial direction of the first fan 4201 is parallel to the axial direction of the second fan 4202; the first fan 4201 and the second fan 4202 are spaced apart along the length direction of the air conditioner, so that the first cavity 20 includes a clearance cavity portion 21 located between the first fan 4201 and the second fan 4202, so that another part of the airflow entering the air inlet cavity 10 enters the second cavity 30 through the clearance cavity portion 21, and then enters the first fan 4201 and the second fan 4202 through the second side air inlet 422 of the first fan 4201 and the second side air inlet 422 of the second fan 4202 respectively.

[0078] It should be noted that the thickness direction of the air conditioner must be perpendicular to the length direction of the air conditioner. When the air conditioner is placed vertically, the length direction of the air conditioner is its height direction.

[0079] Specifically, the first part of the airflow in the air inlet chamber 10 is divided into two parts, namely the third part of the airflow and the fourth part of the airflow; since the first air duct component 401 is located on the side of the second air duct component 402 close to the air inlet chamber 10, the third part of the airflow directly enters the first fan 4201 through the first side air inlet 421 of the first fan 4201; the first cavity 20 includes an avoidance cavity portion, which is located on the side of the first side air inlet 421 of the second fan 4202 facing the air inlet chamber 10, and the avoidance cavity portion is arranged corresponding to the first side air inlet 421 of the second fan 4202, so the fourth part of the airflow flows to the avoidance cavity portion and enters the second fan 4202 from the first side air inlet 421 of the second fan 4202.

[0080] Specifically, the airflow entering the second cavity 30 enters the first fan 4201 and the second fan 4202 through the second side air inlet 422 of the first fan 4201 and the second side air inlet 422 of the second fan 4202 respectively.

[0081] Optionally, the first fan 4201 is an upper fan, and the second fan 4202 is a lower fan.

[0082] Optionally, along the axial direction of the first fan 4201, the first side air inlet 421 of the second fan 4202 is located between the first side air inlet 421 and the second side air inlet 422 of the first fan 4201. Along the axial direction of the second fan 4202, the second side air inlet 422 of the first fan 4201 is located between the first side air inlet 421 and the second side air inlet 422 of the second fan 4202.

[0083] In the present application, the air duct portion 41 includes a first air duct section 411 and a second air duct section 412. A first outlet 423 and a second outlet 424 are provided on the outer circumferential surface of the fan 42, spaced apart along its circumference. The first end of the first air duct section 411 serves as its outlet, and the second end of the first air duct section 411 is connected to and communicates with the first outlet 423. The first end of the second air duct section 412 is connected to and communicates with the second outlet 424, and the second end of the second air duct section 412 serves as its outlet.

[0084] Specifically, the fan 42 includes a shielding member 425 that is movably disposed along the circumference of the fan 42 to block the first outlet 423 or the second outlet 424, thereby allowing the airflow within the fan 42 to flow out from the first outlet 423 or the second outlet 424. The air outlet direction of the fan 42 is switched by controlling the shielding member 425.

[0085] Specifically, when the blocking member 425 blocks the first outlet 423 , the first outlet 423 is in a closed state and the second outlet 424 is in an open state. The airflow in the fan 42 flows from the second outlet 424 into the second air duct section 412 and then flows out from the second end of the second air duct section 412 .

[0086] When the blocking member 425 blocks the second outlet 424 , the first outlet 423 is open and the second outlet 424 is closed, and the air flow in the fan 42 flows from the first outlet 423 into the first air duct section 411 and then flows out from the first end of the first air duct section 411 .

[0087] Specifically, the fourth opening 4012 and the fifth opening 4013 are both opened on the side wall of the second air duct section 412 of the first air duct assembly 401 ; that is, the second air duct section 412 of the first air duct assembly 401 includes the preset air duct section 4015 .

[0088] In the first air duct assembly 401, when the first outlet 423 of the first fan 4201 is in a closed state and the second outlet 424 is in an open state, the airflow in the first fan 4201 flows from the second outlet 424 into the second air duct section 412, and then flows out from the second end of the second air duct section 412. At this time, the second air duct section 412 is used for air outlet, so the fourth opening 4012 and the fifth opening 4013 are both in a closed state; when the first outlet 423 of the first fan 4201 is in an open state and the second outlet 424 is in a closed state, the airflow in the first fan 4201 flows from the first outlet 423 into the first air duct section 411, and then flows out from the first end of the first air duct section 411. At this time, the first air duct section 411 is used for air outlet, that is, the fourth opening 4012 and the fifth opening 4013 can be made open at this time.

[0089] Optionally, the first air duct section 411 is an upper air duct section, and the second air duct section 412 is a lower air duct section.

[0090] In the present application, the fan 42 includes a fan casing and fan blades arranged in the fan casing. The first side air inlet 421, the second side air inlet 422, the first outlet 423 and the second outlet 424 are all arranged on the fan casing; the fan casing is provided with a slide rail extending along the circumference of the fan 42, and the shielding member 425 is slidably arranged on the slide rail.

[0091] Specifically, an annular cavity is formed between the fan housing and the fan blades, and the first outlet 423 and the second outlet 424 are both opened on the outer wall of the annular cavity, so that the first outlet 423 and the second outlet 424 are both connected to the annular cavity; the slide rail is set on the outer wall of the annular cavity.

[0092] Optionally, there are one or more slide rails. When there is only one slide rail, the slide rail does not block the first outlet 423 and the second outlet 424. When there are multiple slide rails, the multiple slide rails are arranged at intervals along the axial direction of the fan 42, and the blocking member 425 is slidably arranged on the multiple slide rails; at the first outlet 423, the first outlet 423 is connected to the annular cavity through the space between any two adjacent slide rails among the multiple slide rails; at the second outlet 424, the second outlet 424 is connected to the annular cavity through the space between any two adjacent slide rails among the multiple slide rails; so as to avoid the multiple slide rails completely blocking the first outlet 423 and the second outlet 424.

[0093] Optionally, the slide rail may also be replaced by a guide structure such as a slide groove.

[0094] Optionally, the fan 42 further includes a drive assembly for driving the shielding member 425 to move circumferentially along the fan 42. For example, the drive assembly includes a motor, a transmission gear, and a transmission rack; the output shaft of the motor is connected to the transmission gear to drive the transmission gear to rotate, and the transmission gear and the transmission rack are engaged with each other so that the transmission gear drives the transmission rack to move circumferentially along the fan 42; the transmission rack is connected to the shielding member 425 so that the transmission rack drives the shielding member 425 to move circumferentially along the fan 42; the transmission rack extends along the circumference of the fan 42; the axial direction of the output shaft of the motor and the axial direction of the transmission gear are both parallel to the axial direction of the fan 42; and the main body of the motor is fixedly mounted on the fan housing.

[0095] Optionally, the shielding member 425 is a reversing volute tongue, and the reversing volute tongue is a rotating volute tongue.

[0096] Optionally, the shielding member 425 is an arc-shaped structure, and the transmission rack is an arc-shaped rack.

[0097] In this application, along the length of the air conditioner, the two sides of the fan 42 are respectively the first side and the second side; the direction from the first side to the second side of the first fan 4201 is the same as the direction from the first side to the second side of the second fan 4202. In the first duct assembly 401, the first end of the first duct segment 411 and the second end of the second duct segment 412 are respectively located on the first side and the second side of the first fan 4201. In the second duct assembly 402, the first end of the first duct segment 411 and the second end of the second duct segment 412 are respectively located on the first side and the second side of the second fan 4202.

[0098] like Figures 8 to 11 As shown, the first side and the second side of the fan 42 are the upper side and the lower side of the fan 42, respectively.

[0099] Along the width of the air conditioner, the fan 42 is flanked by a third side and a fourth side. The direction from the third side to the fourth side of the first fan 4201 is the same as the direction from the third side to the fourth side of the second fan 4202. In the first duct assembly 401, the second end of the first duct segment 411 and the first end of the second duct segment 412 are connected to the fourth side and the third side of the first fan 4201, respectively. In the second duct assembly 402, the second end of the first duct segment 411 and the first end of the second duct segment 412 are connected to the third side and the fourth side of the second fan 4202, respectively.

[0100] like Figures 8 to 11 As shown, the third side and the fourth side of the fan 42 are the left side and the right side of the fan 42 respectively.

[0101] It should be noted that the width direction of the air conditioner is perpendicular to the length direction of the air conditioner, and the width direction of the air conditioner is perpendicular to the thickness direction of the air conditioner.

[0102] Specifically, the preset plane is perpendicular to the length direction of the air conditioner; the projection of the central axis of the first fan 4201 on the preset plane is parallel to or coincides with the projection of the central axis of the second fan 4202 on the preset plane.

[0103] Specifically, along the thickness direction of the air conditioner, the second air duct section 412 of the first air duct assembly 401 is located between the air inlet cavity 10 and the second fan 4202 .

[0104] Specifically, along the thickness direction of the air conditioner, the first air duct section 411 of the second air duct assembly 402 is located between the first fan 4201 and the front panel of the air conditioner; the front panel of the air conditioner is used to enclose the second cavity 30.

[0105] In the present application, the end of the second end of the second air duct section 412 of the first air duct assembly 401 is closed, and the end of the second end of the second air duct section 412 of the second air duct assembly 402 is closed. A first opening 4011 is provided on the side of the second end of the second air duct section 412 of the first air duct component 401, and the first opening 4011 is connected to the second air duct section 412 of the first air duct component 401; a second opening 4021 and a third opening 4022 are provided on the side of the second end of the second air duct section 412 of the second air duct component 402, and the second opening 4021 and the third opening 4022 are both connected to the second air duct section 412 of the second air duct component 402; the first opening 4011 is connected to the second opening 4021, so that the airflow in the second air duct section 412 of the first air duct component 401 passes through the first opening 4011 and the second opening 4021 and enters the second end of the second air duct section 412 of the second air duct component 402; the airflow in the second air duct section 412 of the second air duct component 402 flows out through the third opening 4022. That is, the airflow in the second air duct section 412 of the first air duct assembly 401 merges with the airflow in the second air duct section 412 of the second air duct assembly 402 through the first opening 4011 and the second opening 4021 , and then flows out from the third opening 4022 .

[0106] Optionally, the first opening 4011 is connected to the second opening 4021 .

[0107] In the present application, the first end of the first air duct section 411 of the first air duct assembly 401 is open, so that the airflow in the first air duct section 411 of the first air duct assembly 401 flows out through the first port of the first air duct section 411 of the first air duct assembly 401.

[0108] In the present application, the first end of the first air duct section 411 of the second air duct assembly 402 is open, so that the airflow in the first air duct section 411 of the second air duct assembly 402 flows out through the first port of the first air duct section 411 of the second air duct assembly 402 .

[0109] Optionally, a sixth opening 4014 is provided on the side wall of the first air duct section 411 of the first air duct assembly 401, and a seventh opening 4023 is provided on the side wall of the first air duct section 411 of the second air duct assembly 402. The sixth opening 4014 is communicated with the seventh opening 4023, so that the airflow in the first air duct section 411 of the first air duct assembly 401 and the airflow in the first air duct section 411 of the second air duct assembly 402 can be mixed with each other through the sixth opening 4014 and the seventh opening 4023. This helps to balance the outlet pressures of the first port of the first air duct section 411 of the first air duct assembly 401 and the first port of the first air duct section 411 of the second air duct assembly 402.

[0110] Optionally, the sixth opening 4014 is connected to the seventh opening 4023 .

[0111] In the present application, there are two air inlets, namely a first air inlet 11 and a second air inlet 12 spaced apart along the length of the air conditioner. The first air inlet 11 and the second air inlet 12 are both connected to the air inlet cavity 10, so that external air enters the air inlet cavity 10 through the first air inlet 11 and / or the second air inlet 12. When the fourth opening 4012 is in an open state, the fourth opening 4012 is connected to the second air inlet 12.

[0112] Specifically, when the first air inlet 11 is in a closed state, the second air inlet 12 is in an open state, and when the fourth opening 4012 and the fifth opening 4013 are both in an open state, the external airflow entering from the second air inlet 12 is divided into two parts, namely the fifth part of the airflow and the sixth part of the airflow.

[0113] In the present application, the air inlet chamber 10 includes a main chamber section 101 and a first chamber section that are interconnected. The first chamber section is arranged opposite the air inlet so that airflow from the air inlet flows through the first chamber section and the main chamber section 101 in sequence; that is, airflow flows through the first chamber section into the main chamber section 101. The fourth opening 4012 is connected to the air inlet through the first chamber section.

[0114] Specifically, there are two first cavity sections, namely a second cavity section 102 and a third cavity section 103. The second cavity section 102 is arranged opposite the first air inlet 11, and the third cavity section 103 is arranged opposite the second air inlet 12. The airflow flowing in from the first air inlet 11 flows through the second cavity section 102 into the main cavity section 101; the airflow flowing in from the second air inlet 12 flows through the third cavity section 103 into the main cavity section 101.

[0115] Specifically, when the first air inlet 11 is closed and the second air inlet 12 is open, and when both the fourth opening 4012 and the fifth opening 4013 are open, the external airflow entering from the second air inlet 12 is divided into two parts: a fifth airflow and a sixth airflow. The fifth airflow passes through the third cavity section 103 and the fourth opening 4012 in sequence before entering the air duct portion 41 of the first air duct assembly 401; that is, the fourth opening 4012 is connected to the second air inlet 12 through the third cavity section 103. The sixth airflow passes through the third cavity section 103 and flows into the main cavity section 101 of the air inlet cavity 10.

[0116] In the present application, a heat exchanger 50 is provided in the main cavity section 101, so that the airflow entering the main cavity section 101 exchanges heat with the heat exchanger 50 and then flows out of the air inlet cavity 10. Optionally, the heat exchanger 50 is an evaporator.

[0117] Specifically, the sixth portion of the airflow is the airflow that has undergone heat exchange with the heat exchanger 50 , that is, the first portion of the airflow and the second portion of the airflow are both the airflow that has undergone heat exchange with the heat exchanger 50 .

[0118] The fifth portion of airflow does not pass through the heat exchanger 50 , that is, does not exchange heat with the heat exchanger 50 , but directly enters the fan 42 .

[0119] In the present application, the fan 42 is a centrifugal fan, wherein the centrifugal fan has the characteristic of high wind pressure. Specifically, the fan 42 is a double-suction centrifugal fan.

[0120] In the present application, the air supply system further includes a first opening and closing component 71 , which is disposed at the fourth opening 4012 , so as to open or close the fourth opening 4012 through the first opening and closing component 71 .

[0121] In the present application, the air supply system further includes a second opening and closing component 72 , which is arranged at the fifth opening 4013 to open or close the fifth opening 4013 through the second opening and closing component 72 , that is, the opening and closing state of the fifth opening 4013 is realized through the second opening and closing component 72 .

[0122] In the present application, the first opening and closing component 71 is the first opening and closing mechanism 81 or the second opening and closing mechanism 82 ; the second opening and closing component 72 is the first opening and closing mechanism 81 or the second opening and closing mechanism 82 .

[0123] In the present application, the predetermined opening is the fourth opening 4012 or the fifth opening 4013. The first opening and closing mechanism 81 includes a plurality of opening and closing portions 811, which are sequentially distributed along a predetermined direction of the predetermined opening. Each opening and closing portion 811 is rotatably arranged about a predetermined axis. The predetermined axes of the plurality of opening and closing portions 811 are parallel and perpendicular to the plane in which the predetermined opening is located.

[0124] By rotating each opening and closing portion 811 around its preset axis, the multiple opening and closing portions 811 cover the preset opening, thereby closing the preset opening; at this time, the first opening and closing mechanism 81 is in a closed state, and the preset opening is in a closed state.

[0125] Each opening and closing portion 811 is rotated about its predetermined axis so that a flow gap exists between any two adjacent opening and closing portions 811, thereby opening the predetermined opening. At this point, the first opening and closing mechanism 81 is in the open state, and the predetermined opening is in the open state. That is, the airflow flowing through the predetermined opening flows through the flow gap between any two adjacent opening and closing portions 811.

[0126] Optionally, the preset direction of the preset opening is parallel to the length direction of the air conditioner.

[0127] Optionally, the preset direction of the preset opening is the length direction of the fourth opening 4012 or the fifth opening 4013 .

[0128] Optionally, the opening and closing portion 811 is a plate-like structure. For example, the opening and closing portion 811 is a sheet-like structure.

[0129] Optionally, the first opening and closing mechanism 81 is a grid structure; and the opening and closing portion 811 is a grid sheet.

[0130] Optionally, when the first opening and closing mechanism 81 is in the closed state, the multiple opening and closing portions 811 are sequentially spliced ​​to block the preset opening, thereby closing the preset opening. Alternatively, when the preset direction of the preset opening is parallel to the longitudinal direction of the air conditioner, and when the first opening and closing mechanism 81 is in the closed state, the opening and closing portions 811 of the first opening and closing mechanism 81 are arranged at an acute angle with the longitudinal direction of the air conditioner, and the acute angle is a small angle, so that the opening and closing portions 811 of the first opening and closing mechanism 81 are inclined relative to the longitudinal direction of the air conditioner, thereby ensuring that the multiple opening and closing portions 811 of the first opening and closing mechanism 81 block the preset opening, thereby ensuring that the airflow inside the preset opening does not flow out, or ensuring that the airflow outside the preset opening does not flow into the preset opening.

[0131] In this application, if Figure 12 As shown, the second opening and closing mechanism 82 includes an opening and closing member 821 and a driving assembly. The driving assembly is connected to the opening and closing member 821 to drive the opening and closing member 821 to move closer to or away from the preset opening, so that the opening and closing member 821 blocks or avoids the preset opening, thereby closing or opening the preset opening.

[0132] The opening and closing member 821 is moved in a direction close to the preset opening until the opening and closing member 821 blocks the preset opening. At this time, the second opening and closing mechanism 82 is in a closed state and the preset opening is in a closed state.

[0133] By moving the opening and closing member 821 in a direction away from the preset opening, the opening and closing member 821 is away from the preset opening, so that the opening and closing member 821 avoids the preset opening. At this time, the second opening and closing mechanism 82 is in the open state and the preset opening is in the open state.

[0134] Optionally, the opening and closing member 821 is made to stick to or block the preset opening so that the opening and closing member 821 covers the preset opening.

[0135] In the present application, the driving assembly includes a driving member 822 and an eccentric wheel 823; the output portion of the driving member 822 is connected to the eccentric wheel 823 to drive the eccentric wheel 823 to rotate around its central axis; the rotation axis of the eccentric wheel 823 is perpendicular to the movement direction of the opening and closing member 821 approaching or moving away from the preset opening; the outer peripheral surface of the eccentric wheel 823 is used to abut against the opening and closing member 821.

[0136] The eccentric wheel 823 includes a convex portion and a concave portion. The convex portion refers to the portion of the outer circumference of the eccentric wheel 823 where the distance from the rotation axis of the eccentric wheel 823 is the longest, and the concave portion refers to the portion of the outer circumference of the eccentric wheel 823 where the distance from the rotation axis of the eccentric wheel 823 is the shortest.

[0137] During the rotation of the eccentric wheel 823, and during the process of gradually changing from the contact between the convex portion and the opening and closing member 821 to the contact between the concave portion and the opening and closing member 821, the opening and closing member 821 is driven to move in a first direction. During the rotation of the eccentric wheel 823, and during the process of gradually changing from the contact between the concave portion and the opening and closing member 821 to the contact between the convex portion and the opening and closing member 821, the opening and closing member 821 is driven to move in a second direction; the second direction is opposite to the first direction.

[0138] One of the second direction and the first direction is the direction in which the opening and closing member 821 approaches the preset opening, and the other is the direction in which the opening and closing member 821 moves away from the preset opening. For example, the second direction is the direction in which the opening and closing member 821 approaches the preset opening, and the first direction is the direction in which the opening and closing member 821 moves away from the preset opening.

[0139] Optionally, the opening and closing member 821 is a plate-shaped structure, and one plate surface of the opening and closing member 821 is used to abut against the outer peripheral surface of the eccentric wheel 823.

[0140] Optionally, the output portion of the driving member 822 is an output shaft.

[0141] Optionally, the driving member 822 is a motor.

[0142] Optionally, there are multiple drive assemblies, that is, the second opening and closing mechanism 82 includes multiple drive assemblies, and the multiple drive assemblies are all connected to the opening and closing member 821 to jointly drive the opening and closing member 821 to move closer to or away from the preset opening.

[0143] exist Figure 12 In the embodiment, there are two driving assemblies, and because the eccentric wheels 823 of the two driving assemblies are arranged in a manner, the rotation directions of the eccentric wheels 823 of the two driving assemblies are opposite.

[0144] like Figure 13 As shown, the state of the eccentric wheel 823 relative to the opening and closing member 821 when the second opening and closing mechanism 82 is in the closed state; Figure 14 FIG. 1 shows the state of the eccentric wheel 823 relative to the opening and closing member 821 when the second opening and closing mechanism 82 is in the open state.

[0145] In the present application, the second opening and closing mechanism 82 also includes an elastic member 824, which has a first end and a second end relatively arranged along its elastic expansion and contraction direction; the elastic expansion and contraction direction of the elastic member 824 is parallel to or the same as the movement direction of the opening and closing member 821 approaching or moving away from the preset opening; the first end of the elastic member 824 is connected to the opening and closing member 821, and the second end of the elastic member 824 is fixedly connected.

[0146] When the eccentric wheel 823 drives the opening and closing member 821 to move in the second direction, the elastic member 824 is stretched; when the eccentric wheel 823 drives the opening and closing member 821 to move in the first direction, the stretched elastic member 824 retracts, so that the opening and closing member 821 remains in contact with the outer peripheral surface of the eccentric wheel 823 under the elastic force of the elastic member 824, that is, the elastic member 824 pulls the opening and closing member 821 gradually close to the rotation axis of the eccentric wheel 823.

[0147] Specifically, the elastic member 824 and the eccentric wheel 823 are located on the same side of the opening and closing member 821 .

[0148] Optionally, when the opening and closing member 821 is a plate-shaped structure, the elastic member 824 and the eccentric wheel 823 are located on the same plate surface side of the opening and closing member 821 .

[0149] Optionally, when the recess of the eccentric wheel 823 abuts against the opening and closing member 821 , the elastic member 824 is in a stretched state; when the eccentric wheel 823 drives the opening and closing member 821 to move along the second direction, the elastic member 824 is further stretched.

[0150] Optionally, the elastic member 824 is a spring.

[0151] Optionally, there are multiple elastic members 824 , that is, the opening and closing mechanism includes multiple elastic members 824 , and the elastic expansion and contraction directions of the multiple elastic members 824 are all parallel; the multiple elastic members 824 are all located on the same side of the opening and closing member 821 .

[0152] Optionally, the second opening and closing mechanism 82 is disposed in the second air duct section 412 of the first air duct assembly 401, the second end of the elastic member 824 is fixedly connected to the inner wall of the second air duct section 412 of the first air duct assembly 401, and the main body of the driving member 822 is fixedly connected to the inner wall of the second air duct section 412 of the first air duct assembly 401. Alternatively, as Figures 15 to 17 As shown, the second opening and closing mechanism 82 is arranged in the first cavity 20 and is located on the outside of the second air duct section 412 of the first air duct assembly 401. The second end of the elastic member 824 is fixedly connected to the cavity wall of the first cavity 20, and the main body of the driving member 822 is fixedly connected to the cavity wall of the first cavity 20.

[0153] Optionally, when the second opening and closing mechanism 82 is disposed within the second air duct section 412 of the first air duct assembly 401, a protrusion is provided on the inner wall of the second air duct section 412 of the first air duct assembly 401, and the second end of the elastic member 824 is fixedly connected to the protrusion. Alternatively, when the second opening and closing mechanism 82 is disposed within the first cavity 20 and is located outside the second air duct section 412 of the first air duct assembly 401, a protrusion is provided on the cavity wall of the first cavity 20, and the second end of the elastic member 824 is fixedly connected to the protrusion.

[0154] like Figure 1 、 Figures 3 to 5 As shown, the first opening and closing component 71 is a first opening and closing mechanism 81. Multiple opening and closing portions 811 are sequentially distributed along a predetermined direction of the fourth opening 4012. The predetermined axes of the multiple opening and closing portions 811 are all perpendicular to the plane of the fourth opening 4012. By rotating each opening and closing portion 811 about its predetermined axis, the multiple opening and closing portions 811 are sequentially joined to block the fourth opening 4012, thereby closing the fourth opening 4012. In this state, the first opening and closing mechanism 81 is in a closed state, and the fourth opening 4012 is in a closed state. By rotating each opening and closing portion 811 about its predetermined axis, a flow gap is created between any two adjacent opening and closing portions 811, thereby opening the fourth opening 4012. In this state, the first opening and closing mechanism 81 is in an open state, and the fourth opening 4012 is in an open state. That is, airflow passing through the fourth opening 4012 flows through the flow gap between any two adjacent opening and closing portions 811.

[0155] The second opening and closing member 72 is the second opening and closing mechanism 82. The driving assembly drives the opening and closing member 821 toward or away from the fifth opening 4013, causing the opening and closing member 821 to block or avoid the fifth opening 4013, thereby closing or opening the fifth opening 4013. The opening and closing member 821 is moved toward the fifth opening 4013 until it blocks the fifth opening 4013, at which point the fifth opening 4013 is closed. The opening and closing member 821 is moved away from the fifth opening 4013, causing it to avoid the fifth opening 4013, at which point the fifth opening 4013 is opened.

[0156] In the present application, optionally, the air supply system is a reversible air supply system.

[0157] The present invention further provides an air conditioner comprising the above-mentioned air supply system. Optionally, the air conditioner is a vertical air conditioner. For example, the air conditioner is a cabinet air conditioner.

[0158] Specifically, the interior of the air conditioner housing includes an air inlet cavity 10, a first cavity 20, and a second cavity 30. The air conditioner housing includes a front panel and a back panel 62, and the back panel 62 is used to enclose the air inlet cavity 10.

[0159] Specifically, the first air inlet 11 and the second air inlet 12 are both provided on the housing of the air conditioner. Optionally, the first air inlet 11 is an upper air inlet and the second air inlet 12 is a lower air inlet, that is, the first air inlet 11 and the second air inlet 12 are respectively provided at the upper and lower parts of the air conditioner.

[0160] Specifically, the first air inlet 11 and the second air inlet 12 are provided at the back of the air conditioner.

[0161] Specifically, the air conditioner housing is provided with a first air outlet and a second air outlet. The first port of the first air duct section 411 of the first air duct assembly 401 and the first port of the first air duct section 411 of the second air duct assembly 402 are both connected to the first air outlet, so that the airflow flowing out of the first port of the first air duct section 411 of the first air duct assembly 401 and the first port of the first air duct section 411 of the second air duct assembly 402 both flows out of the first air outlet. The third opening 4022 is connected to the second air outlet, so that the airflow flowing out of the third opening 4022 flows out of the second air outlet.

[0162] Optionally, the first port of the first air duct section 411 of the first air duct assembly 401 and the first port of the first air duct section 411 of the second air duct assembly 402 are both connected to the first air outlet.

[0163] Optionally, the third opening 4022 is connected to the second air outlet.

[0164] Optionally, the first air outlet is an upper air outlet, and the second air outlet is a lower air outlet.

[0165] Optionally, the air conditioner is a reversible distributed air supply air conditioner.

[0166] The present invention also provides an air supply control method, which is applicable to the above-mentioned air supply system or the above-mentioned air conditioner. The air supply system has a first air supply mode and a second air supply mode.

[0167] In the present application, when the air supply system executes the first air supply mode, the air supply control method includes: controlling the first air inlet 11 of the air supply system to be in a closed state, controlling the second air inlet 12 of the air supply system to be in an open state, controlling the second outlets 424 of the fans 42 of the two air duct assemblies 40 of the air supply system to be in a closed state, controlling the first outlets 423 of the fans 42 of the two air duct assemblies 40 of the air supply system to be in an open state, and controlling the fourth opening 4012 and the fifth opening 4013 to be in either a closed state or an open state. The first air supply mode is a bottom-in, top-out air supply mode.

[0168] like Figure 8 and Figure 9 As shown, when the air supply system executes the first air supply mode, since the first outlets 423 of the two fans 42 are in an open state, the airflows in the two fans 42 flow from their respective first outlets 423 into the corresponding first air duct sections 411, that is, the two fans 42 supply air to the corresponding first air duct sections 411; the airflow then flows out from the first ports of the two first air duct sections 411.

[0169] Optionally, the first ends of the two first air duct sections 411 are upper ends, and the second ends of the two first air duct sections 411 are lower ends, so that all airflow is delivered from the top, that is, the first air supply mode is an all-upper air supply mode.

[0170] Optionally, the first ports of the two first air duct sections 411 are both arranged upward, and the first air outlets are arranged upward.

[0171] Specifically, if Figure 3 As shown, when the air supply system executes the first air supply mode, and when the fourth opening 4012 and the fifth opening 4013 are both in the closed state, the air flow enters from the second air inlet 12, and flows into the main cavity section 101 of the air inlet cavity 10 through the third cavity section 103, and is divided into three parts. The fourth part of the air flow directly passes through the heat exchanger 50, passes through the avoidance cavity part, and enters the second fan 4202 from the first side air inlet 421 of the second fan 4202; the second part of the air flow passes through the heat exchanger 50, the interface between the air inlet cavity 10 and the first cavity 20, the give way cavity part 21 of the first cavity 20, the interface between the first cavity 20 and the second cavity 30, and the second cavity 30 in sequence, and then enters the two fans 42 from the second side air inlets 422 of the two fans 42 respectively; the third part of the air flow continues to move upward through the heat exchanger 50, and enters the first fan 4201 from the first side air inlet 421 of the first fan 4201. The airflow enters the second fan 4202 and is pressurized before being sent out through the first air duct section 411 of the second air duct assembly 402 . The airflow enters the first fan 4201 and is pressurized before being sent out through the first air duct section 411 of the first air duct assembly 401 .

[0172] like Figure 4As shown, when the air supply system executes the first air supply mode, and when the fourth opening 4012 and the fifth opening 4013 are both in the open state, the air flow enters from the second air inlet 12 and is divided into two parts, namely the fifth part of the air flow and the sixth part of the air flow; since the pressure of the air inlet cavity 10 is greater than the pressure of the second air duct section 412 of the first air duct assembly 401, the fifth part of the air flow passes through the third cavity section 103 and the fourth opening 4012 and enters the second air duct section 412 of the first air duct assembly 401, and then enters the second cavity 30 from the fifth opening 4013, and then enters the two fans 42 from the second side air inlets 422 of the two fans 42 respectively; the sixth part of the air flow passes through the third cavity section 103 and flows into the inlet The air flows into the main cavity section 101 of the air cavity 10 and is divided into three parts. The fourth part of the air flow directly passes through the heat exchanger 50, passes through the avoidance cavity part, and enters the second fan 4202 from the first side air inlet 421 of the second fan 4202; the second part of the air flow passes through the heat exchanger 50, the interface between the air inlet cavity 10 and the first cavity 20, the avoidance cavity part 21 of the first cavity 20, the interface between the first cavity 20 and the second cavity 30, and the second cavity 30 in sequence, and then enters the two fans 42 from the second side air inlets 422 of the two fans 42 respectively; the third part of the air flow continues to move upward and passes through the heat exchanger 50, and enters the first fan 4201 from the first side air inlet 421 of the first fan 4201. The airflow enters the second fan 4202 and is pressurized before being sent out through the first air duct section 411 of the second air duct assembly 402 . The airflow enters the first fan 4201 and is pressurized before being sent out through the first air duct section 411 of the first air duct assembly 401 .

[0173] When the air supply system executes the first air supply mode, and when the fourth opening 4012 and the fifth opening 4013 are both in a closed state, all airflow entering from the second air inlet 12 needs to pass through the heat exchanger 50 for heat exchange (cooling or heating) processing, and then be sent into the room by the fan. This may cause an increase in airflow resistance in some cases, thereby affecting the overall air volume and energy efficiency ratio; and when the fourth opening 4012 and the fifth opening 4013 are both in an open state, part of the airflow can bypass the heat exchanger 50 (that is, without passing through the heat exchanger 50) and directly enter the fan 42, thereby reducing the flow resistance to increase the air volume.

[0174] When the air supply system executes the first air supply mode, and when the fourth opening 4012 and the fifth opening 4013 are both in the open state, due to the strong stirring of the fan blades 42, the airflow that has not passed through the heat exchanger 50 can be fully mixed with the airflow that has passed through the heat exchanger 50 inside the fan 42, and then sent out from the air-conditioning outlet through the first air duct section 411; at this time, the airflow is a cold airflow, which can meet the indoor cooling needs. At the same time, due to the increase in air volume, the temperature difference between the airflow at the air-conditioning outlet and the indoor temperature is reduced, and the uniformity of the indoor temperature is further improved, thereby avoiding local overcooling and improving comfort.

[0175] When the indoor temperature is in a stable stage, only a small air volume is needed to maintain the indoor temperature, and the first air supply mode can be executed, and the fourth opening 4012 and the fifth opening 4013 are both closed.

[0176] When the room is in the initial cooling stage, the first air supply mode can be executed, and the fourth opening 4012 and the fifth opening 4013 are both opened. The large air volume is conducive to rapid cooling of the room.

[0177] When the air supply system executes the first air supply mode, and when the fourth opening 4012 and the fifth opening 4013 are both in the open state, part of the airflow is allowed to bypass the heat exchanger 50 and directly enter the fan 42, which has the following advantages: 1. Reduced flow resistance and energy saving; since part of the airflow no longer passes through the heat exchanger 50, the total resistance of the airflow is reduced, which not only increases the overall air volume of the system, but also reduces the workload of the fan, thereby saving energy consumption; 2. Increased air volume and rapid cooling; since part of the airflow bypasses the heat exchanger 50 and directly enters the fan, the air volume of the entire system is significantly improved, which is suitable for large spaces or application scenarios that require rapid cooling; 3. Improved indoor temperature uniformity and improved comfort; the airflow that has not passed through the heat exchanger 50 is mixed with the airflow processed by the heat exchanger 50, which helps to improve the uniformity and comfort of the indoor temperature and avoid local overcooling; 4. Extended equipment life; since the burden on the heat exchanger 50 is reduced, its wear can be reduced, thereby extending the service life of the entire air-conditioning system.

[0178] In the present application, when the air supply system executes the second air supply mode, the air supply control method includes: controlling the first air inlet 11 of the air supply system to be in an open state, controlling the second air inlet 12 of the air supply system to be in a closed state, controlling the second outlets 424 of the fans 42 of the two air duct assemblies 40 of the air supply system to be in an open state, controlling the first outlets 423 of the fans 42 of the two air duct assemblies 40 of the air supply system to be in a closed state, and controlling the fourth opening 4012 and the fifth opening 4013 to be in a closed state. The second air supply mode is a top-in, bottom-out air supply mode.

[0179] like Figure 10 and Figure 11 As shown, when the air supply system executes the second air supply mode, since the second outlets 424 of the two fans 42 are in an open state, the airflows in the two fans 42 flow from their respective second outlets 424 into the corresponding second air duct sections 412, that is, the two fans 42 supply air to the corresponding second air duct sections 412; the airflow then flows out from the air outlet ends of the two second air duct sections 412.

[0180] Optionally, the first ends of the two second air duct sections 412 are upper ends, and the second ends of the two second air duct sections 412 are lower ends, so that all airflow is delivered from the bottom, that is, the second air supply mode is a full-downward air supply mode.

[0181] Specifically, if Figure 5 As shown, when the air supply system executes the second air supply mode, the air flow enters the air inlet cavity 10 from the first air inlet 11 and is divided into three parts. The third part of the air flow directly passes through the heat exchanger 50 and enters the first fan 4201 from the first side air inlet 421 of the first fan 4201; the second part of the air flow passes through the heat exchanger 50, the interface between the air inlet cavity 10 and the first cavity 20, the yield cavity part 21 of the first cavity 20, the interface between the first cavity 20 and the second cavity 30, and the second cavity 30 in sequence, and then enters the two fans 42 from the second side air inlets 422 of the two fans 42 respectively; the fourth part of the air flow continues to move downward through the heat exchanger 50, and then passes through the yield cavity part and enters the second fan 4202 from the first side air inlet 421 of the second fan 4202. The airflow enters the second fan 4202 and is pressurized before being sent out through the second air duct section 412 of the second air duct assembly 402 . The airflow enters the first fan 4201 and is pressurized before being sent out through the second air duct section 412 of the first air duct assembly 401 .

[0182] Specifically, when the air conditioner is in cooling mode, the air supply system is in the first air supply mode, and when the air conditioner is in heating mode, the air supply system is in the second air supply mode.

[0183] like Figure 8 and Figure 9 As shown, when the air supply system executes the first air supply mode, the shielding member 425 of the first fan 4201 moves to the lower left side, and the shielding member 425 of the second fan 4202 moves to the lower right side.

[0184] like Figure 10 and Figure 11 As shown, when the air supply system executes the second air supply mode, the shielding member 425 of the first fan 4201 moves to the upper right side, and the shielding member 425 of the second fan 4202 moves to the upper left side.

[0185] The above two air supply modes were simulated and the simulation results are shown in Table 1. In Table 1, the speed refers to the speed of the two fans 42, and the unit is RPM; the upper air volume of the large air volume scheme refers to the upper air volume when the first air supply mode is executed and the fourth opening 4012 and the fifth opening 4013 are both open; the upper air volume of the conventional scheme refers to the upper air volume when the first air supply mode is executed and the fourth opening 4012 and the fifth opening 4013 are both closed; the lower air volume refers to the lower air volume when the second air supply mode is executed; the unit of air volume is m 3 / h.

[0186] Table 1 Simulation comparison of air output of different schemes

[0187]

[0188] Due to the deflection of the airflow and the greater resistance along the way, the air volume of the down-flow solution is smaller than that of the conventional up-flow solution. Comparing the two up-flow solutions, at the same speed, the air volume of the high-volume solution is 180m higher than that of the conventional solution. 3 / h to 240m 3 / h; From the simulation results, it can be seen that the large air volume solution can effectively reduce the reversible air conditioning pipe resistance and achieve a significant increase in air volume.

[0189] like Figure 21 As shown, when the first air supply mode is in operation and both the fourth opening 4012 and the fifth opening 4013 are closed, the overall pipe resistance is relatively high. When the first air supply mode is in operation and both the fourth opening 4012 and the fifth opening 4013 are open, the overall flow resistance is reduced. In other words, after adopting the airflow bypass, the pipe resistance is significantly reduced.

[0190] When performing simulation calculations, the cavity in the air inlet cavity 10 is the air inlet cavity; the cavity in the first cavity 20 is the first cavity. Figure 18 and Figure 19 As shown, the first cavity includes a first cavity portion 201 and a second cavity portion 202. The first cavity portion 201 is located between the two air duct components 40. The cavity in the second cavity 30 is the second cavity. Figure 18 and Figure 19 As shown, the second cavity includes a third cavity portion 301 .

[0191] Optionally, when the first opening and closing component 71 is the first opening and closing mechanism 81, and when the preset direction of the fourth opening 4012 is parallel to the length direction of the air conditioner, and when the air supply system performs the second air supply mode, the first opening and closing mechanism 81 is in a closed state, and the opening and closing portion 811 of the first opening and closing mechanism 81 is set at an acute angle to the length direction of the air conditioner, and the acute angle is a small angle, so that the opening and closing portion 811 of the first opening and closing mechanism 81 is inclined relative to the length direction of the air conditioner, so as to ensure the shielding effect of the multiple opening and closing portions 811 of the first opening and closing mechanism 81 on the fourth opening 4012, thereby ensuring that the airflow in the second air duct section 412 of the first air duct assembly 401 will not enter the air inlet chamber 10.

[0192] Optionally, when the first opening and closing component 71 is the first opening and closing mechanism 81, and when the preset direction of the fourth opening 4012 is parallel to the length direction of the air conditioner, and when the air supply system performs the second air supply mode, the right end of the opening and closing portion 811 of the first opening and closing mechanism 81 is tilted downward to put the first opening and closing mechanism 81 in a closed state; wherein the left and right directions here are Figure 5 Horizontal in.

[0193] Optionally, when the first opening and closing component 71 is the first opening and closing mechanism 81, and when the preset direction of the fourth opening 4012 is parallel to the length direction of the air conditioner, and when the air supply system executes the first air supply mode, and when the first opening and closing mechanism 81 is in a closed state, the opening and closing portion 811 of the first opening and closing mechanism 81 is set at an acute angle to the length direction of the air conditioner, and the acute angle is a small angle, so that the opening and closing portion 811 of the first opening and closing mechanism 81 is inclined relative to the length direction of the air conditioner, that is, the airflow direction in the air inlet cavity 10 is set at an acute angle to the opening and closing portion 811 of the first opening and closing mechanism 81, so as to ensure the shielding effect of the multiple opening and closing portions 811 of the first opening and closing mechanism 81 on the fourth opening 4012, thereby ensuring that the airflow in the air inlet cavity 10 will not enter the second air duct section 412 of the first air duct assembly 401; even if there is leakage, the leakage air volume through the opening and closing portion 811 of the first opening and closing mechanism 81 is extremely small.

[0194] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0195] In the air supply system used in the air conditioner provided by the present invention, the air supply system includes an air inlet cavity 10, a first cavity 20, and a second cavity 30, which are sequentially arranged and connected along the thickness direction of the air conditioner. The air supply system also includes an air inlet, which is connected to the air inlet cavity 10 so that external airflow enters the air inlet cavity 10 through the air inlet. The air supply system also includes an air duct assembly 40, which is arranged in the first cavity 20; the air duct assembly 40 includes an air duct portion 41 and a fan 42, and the fan 42 has a first side air inlet 421 and a second side air inlet 422 arranged along its axial direction, and the axial direction of the fan 42 is parallel to or the same as the thickness direction of the air conditioner. The outlet of the fan 42 is connected to the air duct portion 41, that is, the airflow entering the fan 42 flows out from the outlet of the fan 42, enters the air duct portion 41, and then flows out from the air outlet of the air duct portion 41. The first side air inlet 421 faces the air inlet cavity 10 to communicate with the air inlet cavity 10 ; the second side air inlet 422 faces the second cavity 30 to communicate with the second cavity 30 .

[0196] There are one or more air duct assemblies 40, that is, there is at least one air duct assembly 40. The one or more air duct assemblies 40 include a first air duct assembly 401. A fourth opening 4012 is provided on the side wall of the air duct portion 41 of the first air duct assembly 401 facing the air inlet cavity 10, and the fourth opening 4012 can be opened and closed; a fifth opening 4013 is provided on the side wall of the air duct portion 41 of the first air duct assembly 401 facing the second cavity 30, and the fifth opening 4013 can be opened and closed. When the fourth opening 4012 and the fifth opening 4013 are both in an open state, the fourth opening 4012 is connected to the air inlet, so that part of the airflow entering from the air inlet enters the air duct portion 41 of the first air duct assembly 401 through the fourth opening 4012 and enters the second cavity 30 through the fifth opening 4013; this part of the airflow entering the second cavity 30 enters the fan 42 through the second side air inlet 422.

[0197] The two air duct assemblies 40 of the present application form a parallel air supply system.

[0198] The present application forms a bypass by setting the fourth opening 4012 and the fifth opening 4013, which is an airflow bypass technology. In addition, the opening and closing of the fourth opening 4012 and the fifth opening 4013 are controlled by the first opening and closing component 71 and the second opening and closing component 72 respectively to control the on and off of the bypass, thereby controlling whether the airflow is bypassed. That is, by controlling the opening and closing of the fourth opening 4012 and the fifth opening 4013, the switching of different air volume modes is achieved. The airflow bypass design principle of the present application is as follows: Figure 20 shown.

[0199] To achieve switching of the fan's airflow path, this application uses a shielding member 425 to control the fan's airflow direction. By changing the fan's airflow direction through the shielding member 425, reversible upward and downward airflow is achieved. By controlling the opening and closing of the fourth opening 4012 and the fifth opening 4013, the bypass branch is opened.

[0200] The air supply system of the present application: 1. It provides a carrier for reversible air supply technology, which can realize large circulation of indoor air flow and better comfort; 2. It adopts a special bypass design, which can greatly increase the air volume when necessary, and solves the problems of large air inlet resistance and along-the-path resistance of existing reversible air supply air conditioners; 3. It controls the opening and closing of the shielding member 425, the fourth opening 4012 and the fifth opening 4013 according to actual needs, and realizes the switching of air supply mode and air volume mode to realize multiple air supply modes, thereby meeting the needs of different scenarios.

[0201] The air supply system of the present application guides the incoming air from the heat exchanger 50 side to the front side of the fan 42 by giving way to the cavity portion 21, thereby forming a double-suction centrifugal fan, thereby increasing the air volume; wherein, the front side of the fan 42 is the second side of the fan 42.

[0202] The air supply system of the present application can improve the air volume level in each air supply mode.

[0203] The two air duct assemblies 40 in the present application are stacked along the thickness direction of the air conditioner. Compared with the two air duct assemblies placed side by side along the width direction of the air conditioner, the arrangement of the present application saves more horizontal space (i.e., the width direction of the air conditioner) and can place a larger size (large blade diameter) centrifugal fan, which has a significant effect on increasing the air volume.

[0204] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0205] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0206] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. An air supply system, used in an air conditioner, characterized in that: The air supply system comprises: An air inlet cavity (10), a first cavity (20) and a second cavity (30) are sequentially arranged and communicated along the thickness direction of the air conditioner; an air inlet, communicating with the air inlet cavity (10), so that external airflow enters the air inlet cavity (10) through the air inlet; An air duct assembly (40) is arranged in the first cavity (20); the air duct assembly (40) includes an air duct portion (41) and a fan (42); the fan (42) has a first side air inlet (421) and a second side air inlet (422) arranged along its axial direction, and the axial direction of the fan (42) is parallel to or the same as the thickness direction of the air conditioner; the outlet of the fan (42) is communicated with the air duct portion (41); the first side air inlet (421) faces the air inlet cavity (10) to communicate with the air inlet cavity (10); the second side air inlet (422) faces the second cavity (30) to communicate with the second cavity (30); There are one or more air duct assemblies (40), and the one or more air duct assemblies (40) include a first air duct assembly (401); a fourth opening (4012) is provided on the side wall of the air duct portion (41) of the first air duct assembly (401) facing the air inlet cavity (10), and the fourth opening (4012) can be opened and closed; a fifth opening (4013) is provided on the side wall of the air duct portion (41) of the first air duct assembly (401) facing the second cavity (30), and the fifth opening (4013) can be opened and closed; When the fourth opening (4012) and the fifth opening (4013) are both in an open state, the fourth opening (4012) is connected to the air inlet, so that part of the airflow entering from the air inlet enters the air duct portion (41) of the first air duct assembly (401) through the fourth opening (4012), enters the second cavity (30) through the fifth opening (4013), and then enters the fan (42) through the second side air inlet (422).

2. The air supply system according to claim 1, characterized in that: The air supply system also includes: a first opening and closing component (71), disposed at the fourth opening (4012), so as to open or close the fourth opening (4012) through the first opening and closing component (71); A second opening and closing component (72) is provided at the fifth opening (4013) so as to open or close the fifth opening (4013) through the second opening and closing component (72).

3. The air supply system according to claim 2, characterized in that: The first opening and closing component (71) and / or the second opening and closing component (72) is a first opening and closing mechanism (81); the preset opening is the fourth opening (4012) or the fifth opening (4013); The first opening and closing mechanism (81) comprises a plurality of opening and closing parts (811), the plurality of opening and closing parts (811) being sequentially distributed along a preset direction of the preset opening, and each of the opening and closing parts (811) being rotatably arranged around a preset axis; the preset axes of the plurality of opening and closing parts (811) are all parallel and perpendicular to the plane where the preset opening is located; When the first opening and closing mechanism (81) is in a closed state, the plurality of opening and closing portions (811) cover the preset opening, so that the preset opening is in a closed state; When the first opening and closing mechanism (81) is in an open state, there is a flow gap between any two adjacent opening and closing parts (811), so that the preset opening is in an open state.

4. The air supply system according to claim 2, characterized in that: The first opening and closing component (71) and / or the second opening and closing component (72) is a second opening and closing mechanism (82); the preset opening is the fourth opening (4012) or the fifth opening (4013); The second opening and closing mechanism (82) comprises an opening and closing member (821) and a driving assembly, wherein the driving assembly is connected to the opening and closing member (821) to drive the opening and closing member (821) to approach or move away from the preset opening, so that the opening and closing member (821) blocks or avoids the preset opening, thereby closing or opening the preset opening.

5. The air supply system according to claim 4, characterized in that: The driving assembly comprises a driving member (822) and an eccentric wheel (823); the driving member (822) is connected to the eccentric wheel (823) to drive the eccentric wheel (823) to rotate; the rotation axis of the eccentric wheel (823) is perpendicular to the movement direction of the opening and closing member (821); the outer peripheral surface of the eccentric wheel (823) is used to abut against the opening and closing member (821); and / or The second opening and closing mechanism (82) further comprises an elastic member (824), wherein the elastic member (824) has a first end and a second end arranged opposite to each other along its elastic expansion and contraction direction; the elastic expansion and contraction direction of the elastic member (824) is parallel to or identical to the movement direction of the opening and closing member (821); the first end of the elastic member (824) is connected to the opening and closing member (821), and the second end of the elastic member (824) is fixedly connected.

6. The air supply system according to claim 1, characterized in that: The first cavity (20) includes a clearance cavity portion (21), so that a portion of the airflow entering the air inlet cavity (10) directly enters the fan (42) through the first side air inlet (421), and another portion of the airflow entering the air inlet cavity (10) enters the second cavity (30) through the clearance cavity portion (21), and then enters the fan (42) through the second side air inlet (422).

7. The air supply system according to claim 6, characterized in that: There are two air duct components (40), and the two air duct components (40) are respectively the first air duct component (401) and the second air duct component (402); The first air duct assembly (401) is located on a side of the second air duct assembly (402) close to the air inlet cavity (10); the fan (42) of the first air duct assembly (401) is a first fan (4201), and the fan (42) of the second air duct assembly (402) is a second fan (4202); The axial direction of the first fan (4201) is parallel to the axial direction of the second fan (4202); the first fan (4201) and the second fan (4202) are spaced apart along the length direction of the air conditioner, so that the first cavity (20) includes the yield cavity portion (21) located between the first fan (4201) and the second fan (4202), so that another part of the airflow entering the air inlet cavity (10) enters the second cavity (30) through the yield cavity portion (21), and then enters the first fan (4201) and the second fan (4202) through the second side air inlet (422) of the first fan (4201) and the second side air inlet (422) of the second fan (4202), respectively.

8. The air supply system according to claim 1, characterized in that: The air duct portion (41) comprises a first air duct section (411) and a second air duct section (412); a first outlet (423) and a second outlet (424) are provided on the outer peripheral surface of the fan (42) at intervals along its circumferential direction; the first end of the first air duct section (411) is its air outlet end, and the second end of the first air duct section (411) is connected to and communicates with the first outlet (423); the first end of the second air duct section (412) is connected to and communicates with the second outlet (424), and the second end of the second air duct section (412) is its air outlet end; The fan (42) includes a shielding member (425), which is movably arranged along the circumference of the fan (42) to shield the first outlet (423) or the second outlet (424), thereby allowing the airflow in the fan (42) to flow out from the first outlet (423) or the second outlet (424); The fourth opening (4012) and the fifth opening (4013) are both opened on the side wall of the second air duct section (412) of the first air duct assembly (401).

9. The air supply system according to claim 1, characterized in that: The air inlet chamber (10) comprises a main chamber section (101) and a first chamber section that are interconnected; a heat exchanger (50) is provided in the main chamber section (101) so that the airflow entering the main chamber section (101) exchanges heat with the heat exchanger (50) and then flows out of the air inlet chamber (10); the first chamber section is arranged opposite to the air inlet so that the airflow flowing in from the air inlet flows through the first chamber section and the main chamber section (101) in sequence; the fourth opening (4012) is connected to the air inlet through the first chamber section; and / or The fan (42) is a centrifugal fan.

10. The air supply system according to any one of claims 1 to 9, characterized in that: There are two air inlets, which are respectively a first air inlet (11) and a second air inlet (12) spaced apart along the length direction of the air conditioner, so that external airflow enters the air inlet cavity (10) through the first air inlet (11) and / or the second air inlet (12); When the fourth opening (4012) is in an open state, the fourth opening (4012) is in communication with the second air inlet (12).

11. An air conditioner, characterized in that: The invention comprises the air supply system according to any one of claims 1 to 10.

12. A method for controlling air supply, characterized in that: Applicable to the air supply system according to claim 10; the air supply system has a first air supply mode and a second air supply mode; When the air supply system executes the first air supply mode, the air supply control method includes: controlling the first air inlet (11) of the air supply system to be in a closed state, controlling the second air inlet (12) of the air supply system to be in an open state, controlling the second outlets (424) of the fans (42) of the two air duct components (40) of the air supply system to be in a closed state, controlling the first outlets (423) of the fans (42) of the two air duct components (40) of the air supply system to be in an open state, and controlling the fourth opening (4012) and the fifth opening (4013) of the air supply system to be in a closed state or in an open state; When the air supply system executes the second air supply mode, the air supply control method includes: controlling the first air inlet (11) of the air supply system to be in an open state, and controlling the second air inlet (12) of the air supply system to be in a closed state, and controlling the second outlets (424) of the fans (42) of the two air duct components (40) of the air supply system to be in an open state, and controlling the first outlets (423) of the fans (42) of the two air duct components (40) of the air supply system to be in a closed state, and controlling the fourth opening (4012) and the fifth opening (4013) of the air supply system to be in a closed state.

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