Cabinet type air conditioner indoor unit

Abstract

The cabinet type air conditioner indoor unit comprises a shell and an air duct assembly, a shell cavity is defined by the shell, a lower air opening is formed in the lower portion of the shell, and an upper air opening is formed in the upper portion of the shell; the air duct assembly is arranged in the shell cavity and forms an upper air duct, an upper fan blade cavity, a lower fan blade cavity and a lower air duct; the upper fan blade cavity comprises an upper fan blade cavity outlet and an upper fan blade cavity inlet; the lower fan blade cavity comprises a lower fan blade cavity inlet and a lower fan blade cavity outlet; the upper air duct is communicated with the upper air opening and the upper fan blade cavity outlet, an upper air return opening is formed in the side wall of the upper air duct, two upper air blocking structures are movably arranged at the upper air return opening, and an upper air guide duct can be formed between the two upper air blocking structures; the lower air duct is communicated with the lower air opening and the lower blade cavity outlet, a lower air return opening is formed in the side wall of the lower air duct, two lower air blocking structures are movably arranged at the lower air return opening, and a lower air guide duct can be formed between the two lower air blocking structures; air in the corresponding air ducts is smoothly guided to the shell cavity through the upper air guide ducts and the lower air guide ducts.

Description

Technical Field

[0001] The present invention belongs to the technical field of air conditioners, and particularly relates to a floor-standing air conditioner indoor unit. Background Art

[0002] When a floor-standing air conditioner is operating, due to the difference in air density, there is an uneven phenomenon of temperature stratification in the height direction, resulting in a large vertical temperature difference in the room where the indoor unit is located, thereby affecting the comfort of the air. The position of the air inlet, the position of the air outlet, and the air flow path are the key factors affecting the vertical temperature; in the prior art, the housing is formed with an upper air outlet, a lower air outlet, and an air inlet; by blowing air through the upper air outlet, shower cooling can be achieved, and by blowing air through the lower air outlet, carpet heating can be achieved; however, the positions of the air inlet, the upper air outlet, and the lower air outlet are fixed, and the distances between the air inlet and the upper air outlet and the lower air outlet are both close, which easily causes air flow short circuit, narrow air flow range, and reduces the time required for the vertical temperature difference in the room where the indoor unit is located. Summary of the Invention

[0003] In view of this, the present invention provides a floor-standing air conditioner indoor unit to solve the problems such as the unreasonable position settings of the air inlet and the air outlet in the existing floor-standing air conditioner, which easily cause air flow short circuit, narrow air flow range, and reduce the time required for the vertical temperature difference in the room where the indoor unit is located.

[0004] The present invention provides a floor-standing air conditioner indoor unit, including a housing and an air duct assembly. The housing encloses a housing cavity, and an upper air outlet is formed in the upper part of the housing, and a lower air outlet is formed in the lower part of the housing; both the upper air outlet and the lower air outlet are communicated with the room.

[0005] The air duct assembly is arranged in the housing cavity, and the air duct assembly is formed with an upper air duct, an upper air blade cavity, a lower air blade cavity, and a lower air duct arranged in sequence from top to bottom; the upper air blade cavity includes an upper air blade cavity outlet and an upper air blade cavity inlet; the lower air blade cavity includes a lower air blade cavity inlet and a lower air blade cavity outlet; the upper air blade cavity inlet communicates the upper air blade cavity and the housing cavity, and the lower air blade cavity inlet communicates the lower air blade cavity and the housing cavity.

[0006] The upper air duct communicates the upper air outlet and the upper air blade cavity outlet, and an upper air return opening is formed on the side wall of the upper air duct; the upper air return opening communicates the upper air duct and the housing cavity, and two upper air blocking structures are movably arranged at the upper air return opening; when the two upper air blocking structures are in the first working position, the upper air return opening is in a closed state and the upper air duct is communicated with the upper air blade cavity outlet; when the two upper air blocking structures are in the second working position, the upper air return opening is in an open state, the upper air duct is disconnected from the upper air blade cavity outlet, and an upper air guiding duct is formed between the two upper air blocking structures.

[0007] The lower air duct communicates with the lower air inlet and the outlet of the lower air blade cavity. An air return opening is formed on the side wall of the lower air duct; the air return opening communicates the lower air duct with the housing cavity, and two lower air blocking structures are movably arranged at the air return opening. The two lower air blocking structures have a third working position and a fourth working position. When the two lower air blocking structures are in the third working position, the air return opening is in a closed state and the lower air duct is communicated with the outlet of the lower air blade cavity; when the two lower air blocking structures are in the fourth working position, the air return opening is in an open state, the communication between the lower air duct and the outlet of the lower air blade cavity is disconnected, and a lower air guiding duct is formed between the two lower air blocking structures.

[0008] Further optionally, the floor-standing air conditioner indoor unit is provided with a lower air inlet and upper air outlet mode and an upper air inlet and lower air outlet mode;

[0009] When the floor-standing air conditioner indoor unit is in the lower air inlet and upper air outlet mode, the two upper air blocking structures are in the first working position and the two lower air blocking structures are in the fourth working position; indoor air can enter the lower air duct through the lower air inlet, enter the housing cavity through the air return opening and the lower air guiding duct, then flow through the upper air blade cavity and the upper air duct in sequence, and be discharged through the upper air outlet;

[0010] When the floor-standing air conditioner indoor unit is in the upper air inlet and lower air outlet mode, the two upper air blocking structures are in the second working position and the two lower air blocking structures are in the third working position; indoor air can enter the upper air duct through the upper air outlet, enter the housing cavity through the upper air return opening and the upper air guiding duct, then flow through the lower air blade cavity and the lower air duct in sequence, and be discharged through the lower air outlet.

[0011] Further optionally, the two upper air blocking structures include a first upper air blocking structure and a second upper air blocking structure. The first upper air blocking structure is movably arranged on the upper edge of the upper air return opening, and the second upper air blocking structure is movably arranged on the lower edge of the upper air return opening;

[0012] When the two upper air blocking structures are in the first working position, the plate surfaces of the first upper air blocking structure and the second upper air blocking structure are both abutted against the side wall of the upper air duct to close the upper air return opening and communicate the upper air duct with the outlet of the upper air blade cavity;

[0013] When the two upper air blocking structures are in the second working position, the lower end of the first upper air blocking structure and the upper end of the second upper air blocking structure are both far away from the side wall of the upper air duct and the upper air return opening is opened. The second upper air blocking structure disconnects the upper air duct from the outlet of the upper air blade cavity; an upper air guiding duct is formed between the first upper air blocking structure and the second upper air blocking structure for guiding the air in the upper air duct to the housing cavity.

[0014] Further optionally, the housing includes a rear side wall of the housing; the upper air duct includes an upper main air duct and an upper auxiliary air duct, the upper auxiliary air duct is disposed at the top of the upper main air duct and communicates the upper main air duct and the upper air outlet; the side wall of the upper main air duct includes an oppositely disposed upper main air duct rear side wall and an upper main air duct front side wall; an upper return air opening is formed on the upper main air duct rear side wall, and the upper main air duct rear side wall corresponds to the rear side wall of the housing; the first upper wind blocking structure is rotatably disposed on the outer wall surface of the upper main air duct rear side wall, and the second upper wind blocking structure is rotatably disposed on the inner wall surface of the upper main air duct rear side wall;

[0015] When the two upper wind blocking structures are in the first working position, the plate surfaces of the first upper wind blocking structure and the second upper wind blocking structure are both abutted against the upper main air duct rear side wall;

[0016] When the two upper wind blocking structures are in the second working position, the lower end of the first upper wind blocking structure abuts against the rear side wall of the housing, and the upper end of the second upper wind blocking structure abuts against the upper main air duct front side wall.

[0017] Further optionally, the two lower wind blocking structures include a first lower wind blocking structure and a second lower wind blocking structure, the first lower wind blocking structure is movably disposed at the lower edge of the lower return air opening, and the second lower wind blocking structure is movably disposed at the upper edge of the lower return air opening;

[0018] When the two lower wind blocking structures are in the third working position, the plate surfaces of the first lower wind blocking structure and the second lower wind blocking structure are both abutted against the side wall of the lower air duct and close the lower return air opening, so that the lower air duct and the lower air outlet of the lower air blade cavity are communicated;

[0019] When the two lower wind blocking structures are in the fourth working position, the upper end of the first lower wind blocking structure and the lower end of the second lower wind blocking structure are both away from the side wall of the lower air duct, and the lower return air opening is opened, and the second lower wind blocking structure disconnects the lower air duct and the lower air outlet of the lower air blade cavity; a lower guide air duct is formed between the first lower wind blocking structure and the second lower wind blocking structure for guiding the air in the lower air duct to the housing cavity.

[0020] Further optionally, the lower air duct includes a lower main air duct and a lower auxiliary air duct, the lower auxiliary air duct is disposed at the bottom of the lower main air duct and communicates the lower main air duct and the lower air outlet; the side wall of the lower main air duct includes an oppositely disposed lower main air duct rear side wall and a lower main air duct front side wall; a lower return air opening is formed on the lower main air duct rear side wall, and the lower main air duct rear side wall corresponds to the rear side wall of the housing; the first lower wind blocking structure is rotatably disposed on the outer wall surface of the lower main air duct rear side wall, and the second lower wind blocking structure is rotatably disposed on the inner wall surface of the lower main air duct rear side wall;

[0021] When the two lower wind deflector structures are in the third working position, the plate surfaces of the first lower wind deflector structure and the second lower wind deflector structure are both abutted against the rear side wall of the lower main air duct;

[0022] When the two lower wind deflector structures are in the fourth working position, the upper end of the first lower wind deflector structure abuts against the rear side wall of the housing, and the lower end of the second lower wind deflector structure abuts against the front side wall of the lower main air duct.

[0023] Further optionally, the air duct assembly includes a volute and a volute cover, and the volute and the volute cover are cooperatively connected to form the upper main air duct, the upper fan chamber, the lower fan chamber and the lower main air duct;

[0024] The air duct assembly further includes an upper ventilation shell and a lower ventilation shell, and both the upper ventilation shell and the lower ventilation shell are disposed in the housing cavity; the upper ventilation shell is disposed at the top of the upper main air duct and forms an upper auxiliary air duct, and the lower ventilation shell is disposed at the bottom of the lower main air duct and forms a lower auxiliary air duct.

[0025] Further optionally, the housing includes a left side wall of the housing; the inlet of the upper fan chamber includes a left inlet of the upper fan chamber, and the left inlet of the upper fan chamber is disposed close to the left side wall of the housing; the inlet of the lower fan chamber includes a left inlet of the lower fan chamber, and the left inlet of the lower fan chamber is disposed close to the left side wall of the housing; the cabinet-type air conditioner indoor unit further includes an indoor heat exchanger, and the indoor heat exchanger includes a left heat exchanger disposed in the housing cavity, and the left heat exchanger is disposed close to the left inlet of the upper fan chamber and the left inlet of the lower fan chamber; and / or,

[0026] The housing includes a right side wall of the housing; the inlet of the upper fan chamber includes a right inlet of the upper fan chamber, and the right inlet of the upper fan chamber is disposed close to the right side wall of the housing; the inlet of the lower fan chamber includes a right inlet of the lower fan chamber, and the right inlet of the lower fan chamber is disposed close to the right side wall of the housing; the cabinet-type air conditioner indoor unit further includes an indoor heat exchanger, and the indoor heat exchanger includes a right heat exchanger disposed in the housing cavity, and the right heat exchanger is disposed close to the right inlet of the upper fan chamber and the right inlet of the lower fan chamber.

[0027] Further optionally, the left heat exchanger includes an A1 heat exchange section and a B1 heat exchange section which are arranged opposite to each other up and down; the A1 heat exchange section is disposed close to the left inlet of the upper fan chamber, and the B1 heat exchange section is disposed close to the left inlet of the lower fan chamber; and / or, the right heat exchanger includes an A2 heat exchange section and a B2 heat exchange section which are arranged opposite to each other up and down; the A2 heat exchange section is disposed close to the right inlet of the upper fan chamber, and the B2 heat exchange section is disposed close to the right inlet of the lower fan chamber;

[0028] When the floor-standing air conditioner indoor unit is in the lower air inlet and upper air outlet mode, indoor air can enter the lower air duct through the lower air inlet, enter the housing cavity through the lower return air inlet and the lower air guiding duct. A part of the air enters the upper air blade cavity through the B1 heat exchange section, the A1 heat exchange section and the left inlet of the upper air blade cavity; another part of the air enters the upper air blade cavity through the B2 heat exchange section, the A2 heat exchange section and the right inlet of the upper air blade cavity; the air in the upper air blade cavity is discharged through the upper air duct and the upper air outlet.

[0029] When the floor-standing air conditioner indoor unit is in the upper air inlet and lower air outlet mode, indoor air can enter the upper air duct through the upper air outlet, enter the housing cavity through the upper return air inlet and the upper air guiding duct. A part of the air enters the lower air blade cavity through the A1 heat exchange section, the B1 heat exchange section and the left inlet of the lower air blade cavity; another part of the air enters the lower air blade cavity through the A2 heat exchange section, the B2 heat exchange section and the right inlet of the lower air blade cavity; the air in the lower air blade cavity is discharged through the lower air duct and the lower air outlet.

[0030] Further optionally, an upper air deflector is rotatably provided at the upper air outlet, and the upper air deflector can open or close the upper air outlet or adjust the air outlet direction of the upper air outlet; and / or,

[0031] A lower air deflector is rotatably provided at the lower air outlet, and the lower air deflector can open or close the lower air outlet or adjust the air outlet direction of the lower air outlet.

[0032] Compared with the prior art, the beneficial effects of the present invention mainly lie in:

[0033] The positions of the upper air outlet and the lower air outlet are optimized, and the distance between the upper air outlet and the lower air outlet is increased. According to actual needs, choose upper air inlet - lower air outlet, and use the upper air guiding duct to smoothly guide the air in the upper air duct to the housing cavity, or choose lower air inlet - upper air outlet, and use the lower air guiding duct to smoothly guide the air in the lower air duct to the housing cavity, improve the ventilation volume and reduce the air pressure loss, make full use of the principle that cold air sinks during refrigeration and hot air rises during heating, expand the air flow range, form a large swirling eddy in the room where the indoor unit is located, improve the temperature change speed of indoor air, reduce the vertical temperature difference in the room, make the temperature distribution of indoor air uniform, avoid air flow short circuit, and improve the comfort of air. Description of the Drawings

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and for those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained according to the provided drawings.

[0035] The structures, proportions, sizes, etc. shown in this specification are only used to match the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the conditions for the implementation of the present invention. Therefore, they do not have substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present invention.

[0036] Figure 1 It is a schematic assembly structure diagram of an embodiment of a cabinet-type air conditioner indoor unit provided by the present invention;

[0037] Figure 2 It is a schematic exploded structure diagram of an embodiment of a cabinet-type air conditioner indoor unit provided by the present invention;

[0038] Figure 3 It is a schematic internal structure diagram of an embodiment of a cabinet-type air conditioner indoor unit provided by the present invention;

[0039] Figure 4a and Figure 4b It is a schematic assembly structure diagram of an embodiment of an air duct assembly (without upper and lower auxiliary air ducts) provided by the present invention;

[0040] Figure 5 It is a schematic assembly structure diagram of an embodiment of an air duct assembly (without upper and lower auxiliary air ducts) and an indoor heat exchanger provided by the present invention;

[0041] Figure 6a It is a schematic structure diagram of an embodiment when the cabinet-type air conditioner indoor unit is in the lower air intake and upper air outlet mode provided by the present invention;

[0042] Figure 6b It is a schematic structure diagram of an embodiment when the cabinet-type air conditioner indoor unit is in the upper air intake and lower air outlet mode provided by the present invention;

[0043] Figure 7 It is an enlarged view of the upper air outlet of the cabinet-type air conditioner indoor unit provided by the present invention;

[0044] In the figure:

[0045] 1 - housing; 11 - front side wall of the housing; 111 - lower air outlet; 12 - left side wall of the housing; 13 - right side wall of the housing; 14 - rear side wall of the housing; 15 - top wall of the housing; 151 - upper air outlet; 16 - housing cavity; 17 - base;

[0046] 2 - Air duct assembly; 21 - Volute; 22 - Volute cover; 23 - Upper air blade cavity; 231 - Upper air blade cavity inlet; 232 - Upper air blade cavity outlet; 233 - Upper air blade; 24 - Lower air blade cavity; 241 - Lower air blade cavity inlet; 242 - Lower air blade cavity outlet; 243 - Lower air blade; 25 - Upper main air duct; 251 - Rear side wall of upper main air duct; 252 - Front side wall of upper main air duct; 253 - Upper air return opening; 26 - Lower main air duct; 261 - Rear side wall of lower main air duct; 262 - Front side wall of lower main air duct; 263 - Lower air return opening; 27 - Upper ventilation shell; 271 - Upper auxiliary air duct; 28 - Lower ventilation shell; 281 - Lower auxiliary air duct;

[0047] 31 - First upper wind shielding structure; 32 - Second upper wind shielding structure; 33 - First lower wind shielding structure; 34 - Second lower wind shielding structure; 35 - Upper air deflector; 36 - Lower air deflector; 37 - Air deflector shell; 371 - Air deflecting surface; 38 - Upper connecting rod;

[0048] 41 - A1 heat exchange section; 42 - B1 heat exchange section; 43 - A2 heat exchange section; 44 - B2 heat exchange section. Detailed implementation manners

[0049] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0050] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms of "a", "the" and "said" used in the embodiments of the present invention and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. "Plural" generally includes at least two, but does not exclude the case of including at least one.

[0051] It should be understood that the term " / and / " used herein is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0052] It should also be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a commodity or system comprising a series of elements not only includes those elements but also includes other elements not explicitly listed, or elements inherent to such commodity or system. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the commodity or system comprising said element.

[0053] In the prior art, the housing is formed with an upper air outlet, a lower air outlet and an air inlet; by blowing air through the upper air outlet, shower-type cooling can be achieved, and by blowing air through the lower air outlet, carpet-type heating can be achieved; however, the positions of the air inlet, the upper air outlet and the lower air outlet are fixed, and the distances between the air inlet and the upper air outlet and the lower air outlet are both close, which easily causes air flow short circuit, the air flow range is narrow, and the time required to reduce the vertical temperature difference in the room where the indoor unit is located is increased.

[0054] The present invention creatively provides a cabinet-type air conditioner indoor unit, which includes a housing and an air duct assembly. The housing encloses a housing cavity, and an upper air outlet is formed in the upper part of the housing, and a lower air outlet is formed in the lower part of the housing; the air duct assembly is arranged in the housing cavity.

[0055] The air duct assembly is formed with an upper air duct, an upper air blade cavity, a lower air blade cavity and a lower air duct arranged in sequence from top to bottom; the upper air blade cavity includes an upper air blade cavity outlet and an upper air blade cavity inlet; the lower air blade cavity includes a lower air blade cavity inlet and a lower air blade cavity outlet; the upper air blade cavity inlet communicates with the upper air blade cavity and the housing cavity, and the lower air blade cavity inlet communicates with the lower air blade cavity and the housing cavity.

[0056] The upper air duct communicates with the upper air outlet and the upper air blade cavity outlet, and an upper air return opening is formed on the side wall of the upper air duct; the upper air return opening communicates with the upper air duct and the housing cavity, and two upper air blocking structures are movably arranged at the upper air return opening; when the two upper air blocking structures are in the first working position, the upper air return opening is in a closed state and the upper air duct and the upper air blade cavity outlet are communicated; when the two upper air blocking structures are in the second working position, the upper air return opening is in an open state, the upper air duct and the upper air blade cavity outlet are disconnected, and an upper air guiding duct is formed between the two upper air blocking structures.

[0057] The lower air duct communicates with the lower air outlet and the lower air blade cavity outlet, and a lower air return opening is formed on the side wall of the lower air duct; the lower air return opening communicates with the lower air duct and the housing cavity, and two lower air blocking structures are movably arranged at the lower air return opening; when the two lower air blocking structures are in the third working position, the lower air return opening is in a closed state and the lower air duct and the lower air blade cavity outlet are communicated; when the two lower air blocking structures are in the fourth working position, the lower air return opening is in an open state, the lower air duct and the lower air blade cavity outlet are disconnected, and a lower air guiding duct is formed between the two lower air blocking structures.

[0058] The positions of the upper air inlet and the lower air outlet are optimized, and the distance between the upper air inlet and the lower air outlet is increased; when the indoor unit of the cabinet air conditioner is in the mode of lower air inlet and upper air outlet, the two upper wind baffle structures are in the first working position and the two lower wind baffle structures are in the fourth working position, the upper return air inlet is in a closed state, and the upper air duct is communicated with the outlet of the upper air blade cavity; the lower return air inlet is in an open state, the lower air duct is disconnected from the outlet of the lower air blade cavity, and a lower air guide duct is formed between the two lower wind baffle structures; indoor air can enter the lower air duct through the lower air inlet, enter the housing cavity through the lower return air inlet and the lower air guide duct, then flow through the upper air blade cavity and the upper air duct in sequence, and be discharged through the upper air outlet;

[0059] When the indoor unit of the cabinet air conditioner is in the mode of upper air inlet and lower air outlet, the two upper wind baffle structures are in the second working position and the two lower wind baffle structures are in the third working position; the upper return air inlet is in an open state, the upper air duct is disconnected from the outlet of the upper air blade cavity, and an upper air guide duct is formed between the two upper wind baffle structures; the lower return air inlet is in a closed state, and the lower air duct is communicated with the outlet of the lower air blade cavity; indoor air can enter the upper air duct through the upper air inlet, enter the housing cavity through the upper return air inlet and the upper air guide duct, then flow through the lower air blade cavity and the lower air duct in sequence, and be discharged through the lower air outlet;

[0060] The lower air guide duct is used to smoothly guide the air in the lower air duct to the housing cavity, and the upper air guide duct is used to smoothly guide the air in the upper air duct to the housing cavity, so as to increase the ventilation volume and reduce the air pressure loss. The principles of cold air sinking during refrigeration and hot air rising during heating are fully utilized, the airflow range is expanded, large swirling eddies are formed in the room where the indoor unit is located, the temperature change speed of the indoor air is increased, the vertical temperature difference in the room is reduced, the temperature distribution of the indoor air is made uniform, air flow short - circuit is avoided, and the air comfort is improved.

[0061] As Figures 1 to 7 shown, this embodiment also provides an indoor unit of a cabinet air conditioner, which includes a housing 1 and an air duct assembly 2. The housing 1 encloses a housing cavity 16; an upper air outlet 151 is formed at the upper part of the housing 1, and a lower air outlet 111 is formed at the lower part of the housing 1; both the upper air outlet 151 and the lower air outlet 111 are communicated with the interior; specifically, the housing 1 includes a front housing side wall 11, a rear housing side wall 14, a left housing side wall 12, a right housing side wall 13, a housing top wall 15 and a base 17. The front housing side wall 11 and the rear housing side wall 14 are arranged opposite to each other front - to - back, the left housing side wall 12 and the right housing side wall 13 are arranged opposite to each other left - to - right, and the housing top wall 15 and the base 17 are arranged opposite to each other up - to - down; the front housing side wall 11, the left housing side wall 12, the rear housing side wall 14 and the right housing side wall 13 are connected in sequence, and the front housing side wall 11, the rear housing side wall 14, the left housing side wall 12, the right housing side wall 13, the housing top wall 15 and the base 17 enclose the housing cavity 16; a lower air outlet 111 is formed at the lower side of the front housing side wall 11, and the lower air outlet 111 is close to the base 17; the housing top wall 15 forms an upper air outlet 151; the air duct assembly 2 is arranged in the housing cavity 16;

[0062] The air duct assembly 2 is formed with an upper air duct, an upper blade cavity 23, a lower blade cavity 24, and a lower air duct that are sequentially arranged from top to bottom; the upper blade cavity 23 includes an upper blade cavity outlet 232 and an upper blade cavity inlet 231; the lower blade cavity 24 includes a lower blade cavity inlet 241 and a lower blade cavity outlet 242; an upper blade 233 is rotatably arranged in the upper blade cavity 23, and a lower blade 243 is rotatably arranged in the lower blade cavity 24; specifically, an upper blade cavity outlet 232 is formed on one radial side of the upper blade cavity 23, and an upper blade cavity inlet 231 is formed on each of the two axial sides of the upper blade cavity 23; a lower blade cavity outlet 242 is formed on one radial side of the lower blade cavity 24, and a lower blade cavity inlet 241 is formed on each of the two axial sides of the lower blade cavity 24;

[0063] The upper air duct communicates with the upper air inlet 151 and the upper blade cavity outlet 232. The side wall of the upper air duct forms an upper return air opening 253, and the upper return air opening 253 can communicate the upper air duct with the housing cavity 16; two upper wind blocking structures are movably arranged at the upper return air opening 253; the two upper wind blocking structures have a first working position and a second working position. When the two upper wind blocking structures are in the first working position, the upper return air opening 253 is in a closed state to connect the upper air duct with the upper blade cavity outlet 232, and the upper air duct is not connected with the housing cavity 16; when the two upper wind blocking structures are in the second working position, the upper return air opening 253 is in an open state to disconnect the upper air duct from the upper blade cavity outlet 232, and an upper guiding air duct is formed between the two upper wind blocking structures. The upper air duct is connected with the housing cavity 16, and the upper air duct is connected with the upper blade cavity 23; indoor air can enter the upper air duct through the upper air inlet 151 and enter the housing cavity 16 through the upper guiding air duct;

[0064] The lower air duct communicates with the lower air inlet 111 and the lower blade cavity outlet 242. The side wall of the lower air duct forms a lower return air opening 263; the lower return air opening 263 can communicate the lower air duct with the housing cavity 16, and two lower wind blocking structures are movably arranged at the lower return air opening 263. The two lower wind blocking structures have a third working position and a fourth working position. When the two lower wind blocking structures are in the third working position, the lower return air opening 263 is in a closed state to connect the lower air duct with the lower blade cavity outlet 242, and the lower air duct is not connected with the housing cavity 16; when the two lower wind blocking structures are in the fourth working position, the lower return air opening 263 is in an open state to disconnect the lower air duct from the lower blade cavity outlet 242, and a lower guiding air duct is formed between the two lower wind blocking structures. The lower air duct is connected with the housing cavity 16; indoor air can enter the lower air duct through the lower air inlet 111 and enter the housing cavity 16 through the lower guiding air duct;

[0065] The upper airfoil cavity inlet 231 communicates with the upper airfoil cavity 23 and the housing cavity 16, and the air in the housing cavity 16 can enter the upper airfoil cavity 23 through the upper airfoil cavity inlet 231; the lower airfoil cavity inlet 241 communicates with the lower airfoil cavity 24 and the housing cavity 16, and the air in the housing cavity 16 can enter the lower airfoil cavity 24 through the lower airfoil cavity inlet 241; the upper air return opening 253 communicates with the upper air duct and the housing cavity 16, and the air in the upper air duct can enter the housing cavity 16 through the upper air return opening 253; the lower air return opening 263 communicates with the lower air duct and the housing cavity 16, and the air in the lower air duct can enter the housing cavity 16 through the lower air return opening 263.

[0066] The floor-standing air conditioner indoor unit is provided with a lower air inlet and upper air outlet mode and an upper air inlet and lower air outlet mode; when the two upper wind-blocking structures are in the first working position and the two lower wind-blocking structures are in the fourth working position, and the upper airfoil 233 rotates, the indoor air can enter the lower air duct through the lower air outlet 111, enter the housing cavity 16 through the lower air return opening 263 and the lower air guiding duct, then enter the upper airfoil cavity 23 through the upper airfoil cavity inlet 231, and be discharged through the upper air duct and the upper air outlet 151, realizing lower air inlet and upper air outlet; at this time, the floor-standing air conditioner indoor unit can operate in the cooling mode;

[0067] When the two upper wind-blocking structures are in the second working position and the two lower wind-blocking structures are in the third working position, and the lower airfoil 243 rotates, the indoor air can enter the upper air duct through the upper air outlet 151, enter the housing cavity 16 through the upper air return opening 253 and the upper air guiding duct, then enter the lower airfoil cavity 24 through the lower airfoil cavity inlet 241, and be discharged through the lower air duct and the lower air outlet 111, realizing upper air inlet and lower air outlet; at this time, the floor-standing air conditioner indoor unit can operate in the heating mode.

[0068] Further, the two upper wind-blocking structures include a first upper wind-blocking structure 31 and a second upper wind-blocking structure 32. The first upper wind-blocking structure 31 is rotatably arranged on the upper edge of the upper air return opening 253, and the second upper wind-blocking structure 32 is rotatably arranged on the lower edge of the upper air return opening 253; when the two upper wind-blocking structures rotate towards the side wall close to the upper air duct, the two upper wind-blocking structures can be in the first working position; at this time, the plate surfaces of the two upper wind-blocking structures are both attached to the side wall of the upper air duct and close the upper air return opening 253, making the upper air duct communicate with the upper airfoil cavity outlet 232;

[0069] When the two upper wind-blocking structures rotate away from the side wall of the upper main air duct 25, the two upper wind-blocking structures can be in the second working position; at this time, the lower end of the first upper wind-blocking structure 31 and the upper end of the second upper wind-blocking structure 32 are both far from the side wall of the upper air duct and the upper air return opening 253 is opened. The second upper wind-blocking structure 32 disconnects the upper air duct from the upper airfoil cavity outlet 232, and an upper air guiding duct is formed between the first upper wind-blocking structure 31 and the second upper wind-blocking structure 32 for guiding the air in the upper air duct to the housing cavity 16; adjusting the relative angle between the first upper wind-blocking structure 31 and the second upper wind-blocking structure 32 can adjust the air guiding direction of the upper air guiding duct;

[0070] The first upper wind blocking structure 31 is the first upper baffle, and the second upper wind blocking structure 32 is the second upper baffle.

[0071] In view of the problems that the unreasonable positions of the two upper wind blocking structures result in the untimely closing of the upper return air outlet 253 and poor air guiding effect of the upper air duct, this embodiment proposes that the upper air duct includes an upper main air duct 25 and an upper auxiliary air duct 271. The upper auxiliary air duct 271 is arranged on the top of the upper main air duct 25 and communicates with the upper main air duct 25 and the upper air outlet 151. The side wall of the upper main air duct 25 includes an upper main air duct rear side wall 251 and an upper main air duct front side wall 252 which are arranged opposite to each other. The upper main air duct front side wall 252 corresponds to the front side wall 11 of the housing, and the upper main air duct rear side wall 251 corresponds to the rear side wall 14 of the housing. An upper return air outlet 253 is formed on the upper main air duct rear side wall 251. The first upper wind blocking structure 31 is rotatably arranged on the outer wall surface of the upper main air duct rear side wall 251, and the second upper wind blocking structure 32 is rotatably arranged on the inner wall surface of the upper main air duct rear side wall 251.

[0072] Both of the two upper wind blocking structures rotate towards the direction close to the upper main air duct rear side wall 251. Then, the plate surfaces of the first upper wind blocking structure 31 and the second upper wind blocking structure 32 are both abutted against the upper main air duct rear side wall 251. At this time, the two upper wind blocking structures are in the first working position.

[0073] The first upper wind blocking structure 31 can rotate towards the direction away from the upper main air duct rear side wall 251 and close to the rear side wall 14 of the housing. Then, the lower end of the first upper wind blocking structure 31 abuts against the rear side wall 14 of the housing. The second upper wind blocking structure 32 can rotate towards the direction away from the upper main air duct rear side wall 251 and close to the upper main air duct front side wall 252. Then, the upper end of the second upper wind blocking structure 32 abuts against the upper main air duct front side wall 252. At this time, the two upper wind blocking structures are in the second working position.

[0074] In addition, the two lower wind blocking structures include a first lower wind blocking structure 33 and a second lower wind blocking structure 34. The first lower wind blocking structure 33 is rotatably arranged on the lower edge of the lower return air outlet 263, and the second lower wind blocking structure 34 is rotatably arranged on the upper edge of the lower return air outlet 263. Both of the two lower wind blocking structures rotate towards the direction close to the side wall of the lower main air duct 26. Then, the plate surfaces of the two lower wind blocking structures are both abutted against the side wall of the lower air duct to close the lower return air outlet 263 and connect the lower air duct and the lower air blade cavity outlet 242. At this time, the two lower wind blocking structures are in the third working position.

[0075] Both of the two lower wind deflector structures rotate away from the side wall of the lower air duct, enabling the two lower wind deflector structures to be in the fourth working position; at this time, the upper end of the first lower wind deflector structure 33 and the lower end of the second lower wind deflector structure 34 are both away from the side wall of the lower air duct, and the lower air return opening 263 is opened. The second lower wind deflector structure 34 disconnects the lower air duct from the outlet 242 of the lower wind blade cavity. A lower air guiding duct is formed between the first lower wind deflector structure 33 and the second lower wind deflector structure 34 for guiding the air in the lower air duct to the housing cavity 16; adjusting the relative angle between the first lower wind deflector structure 33 and the second lower wind deflector structure 34 can adjust the air guiding direction of the lower air guiding duct.

[0076] The first lower wind deflector structure 33 is the first lower baffle, and the second lower wind deflector structure 34 is the second lower baffle.

[0077] Aiming at the problems that the unreasonable position setting of the two lower wind deflector structures leads to untimely closing of the lower air return opening 263 and poor air guiding effect of the lower air guiding duct, in this embodiment, it is proposed that the lower air duct includes a lower main air duct 26 and a lower auxiliary air duct 281. The lower auxiliary air duct 281 is arranged at the bottom of the lower main air duct 26 and communicates with the lower main air duct 26 and the lower air outlet 111. The side wall of the lower main air duct 26 includes a relatively arranged lower main air duct rear side wall 261 and a lower main air duct front side wall 262. The lower main air duct front side wall 262 corresponds to the housing front side wall 11, and the lower main air duct rear side wall 261 corresponds to the housing rear side wall 14. The lower main air duct rear side wall 261 forms the lower air return opening 263. The first lower wind deflector structure 33 is rotatably arranged on the outer wall surface of the lower main air duct rear side wall 261, and the second lower wind deflector structure 34 is rotatably arranged on the inner wall surface of the lower main air duct rear side wall 261.

[0078] Both of the two lower wind deflector structures rotate towards the direction close to the lower main air duct rear side wall 261. Further, the plate surfaces of the first lower wind deflector structure 33 and the second lower wind deflector structure 34 are both abutted against the lower main air duct rear side wall 261; at this time, the two lower wind deflector structures are in the third working position.

[0079] The first lower wind deflector structure 33 can rotate away from the lower main air duct rear side wall 261 and towards the housing rear side wall 14. Further, the upper end of the first lower wind deflector structure 33 abuts against the housing rear side wall 14. The second lower wind deflector structure 34 can rotate away from the lower main air duct rear side wall 261 and towards the lower main air duct front side wall 262. Further, the lower end of the second lower wind deflector structure 34 abuts against the lower main air duct front side wall 262; at this time, the two lower wind deflector structures are in the fourth working position.

[0080] In view of the problem that the air outlet direction of the upper air inlet 151 cannot be adjusted, in this embodiment, an upper air guiding assembly is provided at the upper air inlet 151. The upper air guiding assembly includes an upper air guiding plate 35, an upper connecting rod 38, and an upper air guiding motor. A plurality of upper air guiding plates 35 are provided, and the plurality of upper air guiding plates 35 are arranged at intervals in the width direction of the upper air inlet 151 and are rotatably arranged at the upper air inlet 151. Each upper air guiding plate 35 forms an upper connecting portion at one end far from its own rotating shaft, and the plurality of upper connecting portions are connected by the upper connecting rod 38.

[0081] When one of the plurality of upper air guiding plates 35 is controlled to rotate, the plurality of upper air guiding plates 35 can rotate synchronously, so as to open or close the upper air inlet 151 or adjust the air outlet direction of the upper air inlet 151. Specifically, the upper air guiding motor is drivingly connected to one of the upper air guiding plates 35, and the upper air guiding motor drives the upper air guiding plate 35 to rotate, and then the plurality of upper air guiding plates 35 rotate synchronously.

[0082] In addition, in view of the problem that the upper air inlet 151 cannot form forward air outlet or the air in front of the upper air inlet 151 cannot enter the upper air inlet 151, in this embodiment, a wind guiding shell 37 is provided on the upper side of the upper air inlet 151. The wind guiding shell 37 includes a wind guiding surface 371, and the wind guiding surface 371 can guide the wind discharged from the upper air inlet 151 to the front side of the wind guiding shell 37, or the air in front of the wind guiding shell 37 can enter the upper air inlet 151 through the wind guiding surface 371.

[0083] In view of the problem that the air outlet direction of the lower air inlet 111 cannot be adjusted, in this embodiment, a lower air guiding assembly is provided at the lower air inlet 111. The lower air guiding assembly includes a lower air guiding plate 36, a lower connecting rod, and a lower air guiding motor. A plurality of lower air guiding plates 36 are provided, and the plurality of lower air guiding plates 36 are arranged at intervals in the width direction of the lower air inlet 111 and are rotatably arranged at the lower air inlet 111. Each lower air guiding plate 36 forms a lower connecting portion at one end far from its own rotating shaft, and the plurality of lower connecting portions are connected by the lower connecting rod.

[0084] When one of the plurality of lower air guiding plates 36 is controlled to rotate, the plurality of lower air guiding plates 36 can rotate synchronously, so as to open or close the lower air inlet 111 or adjust the air outlet direction of the lower air inlet 111. Specifically, the lower air guiding motor is drivingly connected to one of the lower air guiding plates 36, and the lower air guiding motor drives the lower air guiding plate 36 to rotate, and then the plurality of lower air guiding plates 36 rotate synchronously.

[0085] In view of the problem that the heat exchange efficiency between the air and the indoor heat exchanger is low when the air enters the inside of the housing 1, in this embodiment, the upper vane cavity inlet 231 includes a left upper vane cavity inlet and a right upper vane cavity inlet, and the left upper vane cavity inlet and the right upper vane cavity inlet are respectively arranged close to the left side wall 12 and the right side wall 13 of the housing; the lower vane cavity inlet 241 includes a left lower vane cavity inlet and a right lower vane cavity inlet, and the left lower vane cavity inlet and the right lower vane cavity inlet are respectively arranged close to the left side wall 12 and the right side wall 13 of the housing.

[0086] The cabinet-type air conditioner indoor unit further includes an indoor heat exchanger, which includes a left heat exchanger and a right heat exchanger both arranged in the housing cavity 16. The left heat exchanger is arranged close to the left inlet of the upper air duct cavity and the left inlet of the lower air duct cavity, and the right heat exchanger is arranged close to the right inlet of the upper air duct cavity and the right inlet of the lower air duct cavity.

[0087] Furthermore, the left heat exchanger includes an A1 heat exchange section 41 and a B1 heat exchange section 42 arranged opposite to each other vertically; the A1 heat exchange section 41 is arranged close to the left inlet of the upper air duct cavity, and the B1 heat exchange section 42 is arranged close to the left inlet of the lower air duct cavity; the right heat exchanger includes an A2 heat exchange section 43 and a B2 heat exchange section 44 arranged opposite to each other vertically; the A2 heat exchange section 43 is arranged close to the right inlet of the upper air duct cavity, and the B2 heat exchange section 44 is arranged close to the right inlet of the lower air duct cavity.

[0088] When the cabinet-type air conditioner indoor unit is in the lower-air-inlet and upper-air-outlet mode, the upper air blade 233 rotates, and indoor air can flow through the lower air inlet 111 in sequence, then through the lower auxiliary air duct 281 and the lower main air duct 26, and enter the housing cavity 16 through the lower return air inlet 263 and the lower air guide duct. A part of the air in the housing cavity 16 flows through the B1 heat exchange section 42, the A1 heat exchange section 41, and the left inlet of the upper air duct cavity in sequence and enters the upper air duct cavity 23, and another part of the air in the housing cavity 16 flows through the B2 heat exchange section 44, the A2 heat exchange section 43, and the right inlet of the upper air duct cavity in sequence and enters the upper air duct cavity 23; the air in the upper air duct cavity 23 is discharged through the upper main air duct 25, the upper auxiliary air duct 271, and the upper air outlet 151;

[0089] When the cabinet-type air conditioner indoor unit is in the upper-air-inlet and lower-air-outlet mode, the lower air blade 243 rotates, and indoor air can flow through the upper air outlet 151 in sequence, then through the upper auxiliary air duct 271 and the upper main air duct 25, and enter the housing cavity 16 through the upper return air inlet 253 and the upper air guide duct. A part of the air in the housing cavity 16 flows through the A1 heat exchange section 41, the B1 heat exchange section 42, and the left inlet of the lower air duct cavity in sequence and enters the lower air duct cavity 24, and another part of the air in the housing cavity 16 flows through the A2 heat exchange section 43, the B2 heat exchange section 44, and the right inlet of the lower air duct cavity in sequence and enters the lower air duct cavity 24; the air in the lower air duct cavity 24 is discharged through the lower main air duct 26, the lower auxiliary air duct 281, and the lower air outlet 111;

[0090] Specifically, both the A1 heat exchange section 41 and the B1 heat exchange section 42 are plate heat exchangers; the A1 heat exchange section 41 and the B1 heat exchange section 42 are arranged in a zigzag structure, and this zigzag structure protrudes towards the left side wall 12 of the housing;

[0091] Both the A2 heat exchange section 43 and the B2 heat exchange section 44 are plate heat exchangers; the A2 heat exchange section 43 and the B2 heat exchange section 44 are arranged in a zigzag structure, and this zigzag structure protrudes towards the right side wall 13 of the housing;

[0092] The A1 heat exchange section 41 and the B1 heat exchange section 42 satisfy: 90° ≤ ɑ ≤ 180°, and the A2 heat exchange section 43 and the B2 heat exchange section 44 satisfy: 90° ≤ β ≤ 180°;

[0093] Where ɑ is the angle between the heat exchange surfaces of the A1 heat exchange section 41 and the B1 heat exchange section 42, and β is the angle between the heat exchange surfaces of the A2 heat exchange section 43 and the B2 heat exchange section 44.

[0094] Regarding the problem that the air inlet and outlet are not smooth due to the unreasonable structural design of the air duct assembly 2, in this embodiment, it is proposed that the air duct assembly 2 includes a volute 21 and a volute cover 22, and the volute 21 and the volute cover 22 are cooperatively connected to form an upper main air duct 25, an upper air blade cavity 23, a lower air blade cavity 24, and a lower main air duct 26;

[0095] When the cabinet-type air conditioner indoor unit is in the lower air inlet and upper air outlet mode, the upper air blade 233 rotates and the lower air blade 243 does not rotate;

[0096] When the cabinet-type air conditioner indoor unit is in the upper air inlet and lower air outlet mode, the upper air blade 233 does not rotate and the lower air blade 243 rotates.

[0097] In addition, the air duct assembly 2 further includes an upper ventilation shell 27 and a lower ventilation shell 28, and both the upper ventilation shell 27 and the lower ventilation shell 28 are arranged in the housing cavity 16; the upper ventilation shell 27 is arranged at the top of the upper main air duct 25 and forms an upper auxiliary air duct 271; the lower ventilation shell 28 is arranged at the bottom of the lower main air duct 26 and forms a lower auxiliary air duct 281.

[0098] The exemplary embodiments of the present disclosure have been specifically shown and described above. It should be understood that the present disclosure is not limited to the detailed structures, arrangement manners, or implementation methods described herein; on the contrary, the present disclosure is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A cabinet-type air conditioner indoor unit, characterized in that, It includes a housing and an air duct assembly. The housing encloses a housing cavity, and an upper air inlet is formed at the upper part of the housing, and a lower air outlet is formed at the lower part of the housing. Both the upper air inlet and the lower air outlet communicate with the interior of the room. The air duct assembly is arranged in the housing cavity, and the air duct assembly forms an upper air duct, an upper air blade cavity, a lower air blade cavity, and a lower air duct which are arranged in sequence from top to bottom. The upper air blade cavity includes an upper air blade cavity outlet and an upper air blade cavity inlet. The lower air blade cavity includes a lower air blade cavity inlet and a lower air blade cavity outlet. The upper air blade cavity inlet communicates the upper air blade cavity with the housing cavity, and the lower air blade cavity inlet communicates the lower air blade cavity with the housing cavity. The upper air duct communicates the upper air inlet with the upper air blade cavity outlet, and an upper air return opening is formed on the side wall of the upper air duct. The upper air return opening communicates the upper air duct with the housing cavity, and two upper wind shielding structures are movably arranged at the upper air return opening. The two upper wind shielding structures have a first working position and a second working position. When the two upper wind shielding structures are in the first working position, the upper air return opening is in a closed state and the upper air duct is communicated with the upper air blade cavity outlet. When the two upper wind shielding structures are in the second working position, the upper air return opening is in an open state, the upper air duct is disconnected from the upper air blade cavity outlet, and an upper air guiding duct is formed between the two upper wind shielding structures. The lower air duct communicates the lower air outlet with the lower air blade cavity outlet, and a lower air return opening is formed on the side wall of the lower air duct. The lower air return opening communicates the lower air duct with the housing cavity, and two lower wind shielding structures are movably arranged at the lower air return opening. The two lower wind shielding structures have a third working position and a fourth working position. When the two lower wind shielding structures are in the third working position, the lower air return opening is in a closed state and the lower air duct is communicated with the lower air blade cavity outlet. When the two lower wind shielding structures are in the fourth working position, the lower air return opening is in an open state, the lower air duct is disconnected from the lower air blade cavity outlet, and a lower air guiding duct is formed between the two lower wind shielding structures.

2. The cabinet-type air conditioner indoor unit according to claim 1, characterized in that, The cabinet-type air conditioner indoor unit is provided with a lower air inlet and upper air outlet mode and an upper air inlet and lower air outlet mode. When the cabinet-type air conditioner indoor unit is in the lower air inlet and upper air outlet mode, the two upper wind shielding structures are in the first working position and the two lower wind shielding structures are in the fourth working position. Indoor air can enter the lower air duct through the lower air outlet, enter the housing cavity through the lower air return opening and the lower air guiding duct, then flow through the upper air blade cavity and the upper air duct in sequence, and be discharged through the upper air inlet. When the cabinet-type air conditioner indoor unit is in the upper air inlet and lower air outlet mode, the two upper wind shielding structures are in the second working position and the two lower wind shielding structures are in the third working position. Indoor air can enter the upper air duct through the upper air inlet, enter the housing cavity through the upper air return opening and the upper air guiding duct, then flow through the lower air blade cavity and the lower air duct in sequence, and be discharged through the lower air outlet.

3. The cabinet-type air conditioner indoor unit according to claim 2, characterized in that, The two upper air deflector structures include a first upper air deflector structure and a second upper air deflector structure. The first upper air deflector structure is movably arranged on the upper edge of the upper air return opening, and the second upper air deflector structure is movably arranged on the lower edge of the upper air return opening; When the two upper air deflector structures are in the first working position, the plate surfaces of the first upper air deflector structure and the second upper air deflector structure are both abutted against the side wall of the upper air duct and close the upper air return opening, so that the upper air duct is communicated with the outlet of the upper air blade cavity; When the two upper air deflector structures are in the second working position, the lower end of the first upper air deflector structure and the upper end of the second upper air deflector structure are both far away from the side wall of the upper air duct and open the upper air return opening. The second upper air deflector structure disconnects the upper air duct from the outlet of the upper air blade cavity. An upper air guide duct is formed between the first upper air deflector structure and the second upper air deflector structure for guiding the air in the upper air duct to the housing cavity.

4. The cabinet-type air conditioner indoor unit according to claim 3, characterized in that, The housing includes a housing rear side wall. The upper air duct includes an upper main air duct and an upper auxiliary air duct. The upper auxiliary air duct is arranged on the top of the upper main air duct and communicates the upper main air duct and the upper air outlet. The side wall of the upper main air duct includes an upper main air duct rear side wall and an upper main air duct front side wall which are oppositely arranged. The upper main air duct rear side wall is formed with an upper air return opening, and the upper main air duct rear side wall corresponds to the housing rear side wall. The first upper air deflector structure is rotatably arranged on the outer wall surface of the upper main air duct rear side wall, and the second upper air deflector structure is rotatably arranged on the inner wall surface of the upper main air duct rear side wall; When the two upper air deflector structures are in the first working position, the plate surfaces of the first upper air deflector structure and the second upper air deflector structure are both abutted against the upper main air duct rear side wall; When the two upper air deflector structures are in the second working position, the lower end of the first upper air deflector structure abuts against the housing rear side wall, and the upper end of the second upper air deflector structure abuts against the upper main air duct front side wall.

5. The cabinet-type air conditioner indoor unit according to claim 4, characterized in that, The two lower air deflector structures include a first lower air deflector structure and a second lower air deflector structure. The first lower air deflector structure is movably arranged on the lower edge of the lower air return opening, and the second lower air deflector structure is movably arranged on the upper edge of the lower air return opening; When the two lower air deflector structures are in the third working position, the plate surfaces of the first lower air deflector structure and the second lower air deflector structure are both abutted against the side wall of the lower air duct and close the lower air return opening, so that the lower air duct is communicated with the outlet of the lower air blade cavity; When the two lower air deflector structures are in the fourth working position, the upper end of the first lower air deflector structure and the lower end of the second lower air deflector structure are both far away from the side wall of the lower air duct, and the lower air return opening is opened. The second lower air deflector structure disconnects the lower air duct from the outlet of the lower air blade cavity. A lower air guide duct is formed between the first lower air deflector structure and the second lower air deflector structure for guiding the air in the lower air duct to the housing cavity.

6. The indoor cabinet air conditioner according to claim 5, wherein, The lower air duct includes a lower main air duct and a lower auxiliary air duct. The lower auxiliary air duct is arranged at the bottom of the lower main air duct and communicates with the lower main air duct and the lower air outlet. The side wall of the lower main air duct includes a rear side wall of the lower main air duct and a front side wall of the lower main air duct which are oppositely arranged. A lower air return opening is formed in the rear side wall of the lower main air duct, and the rear side wall of the lower main air duct corresponds to the rear side wall of the housing. The first lower wind blocking structure is rotatably arranged on the outer wall surface of the rear side wall of the lower main air duct, and the second lower wind blocking structure is rotatably arranged on the inner wall surface of the rear side wall of the lower main air duct. When the two lower wind blocking structures are in the third working position, the plate surfaces of the first lower wind blocking structure and the second lower wind blocking structure are both abutted against the rear side wall of the lower main air duct. When the two lower wind blocking structures are in the fourth working position, the upper end of the first lower wind blocking structure abuts against the rear side wall of the housing, and the lower end of the second lower wind blocking structure abuts against the front side wall of the lower main air duct.

7. The cabinet-type air conditioner indoor unit according to claim 6, characterized in that, The air duct assembly includes a volute and a volute cover. The volute and the volute cover are cooperatively connected to form the upper main air duct, the upper wind blade cavity, the lower wind blade cavity and the lower main air duct. The air duct assembly further includes an upper ventilation shell and a lower ventilation shell. The upper ventilation shell and the lower ventilation shell are both arranged in the housing cavity. The upper ventilation shell is arranged at the top of the upper main air duct and forms an upper auxiliary air duct, and the lower ventilation shell is arranged at the bottom of the lower main air duct and forms a lower auxiliary air duct.

8. The cabinet-type air conditioner indoor unit according to claim 2, characterized in that, The housing includes a left side wall of the housing. The inlet of the upper wind blade cavity includes a left inlet of the upper wind blade cavity which is arranged close to the left side wall of the housing. The inlet of the lower wind blade cavity includes a left inlet of the lower wind blade cavity which is arranged close to the left side wall of the housing. The cabinet-type indoor air conditioner further includes an indoor heat exchanger. The indoor heat exchanger includes a left heat exchanger arranged in the housing cavity, and the left heat exchanger is arranged close to the left inlet of the upper wind blade cavity and the left inlet of the lower wind blade cavity; and / or, The housing includes a right side wall of the housing. The inlet of the upper wind blade cavity includes a right inlet of the upper wind blade cavity which is arranged close to the right side wall of the housing. The inlet of the lower wind blade cavity includes a right inlet of the lower wind blade cavity which is arranged close to the right side wall of the housing. The cabinet-type indoor air conditioner further includes an indoor heat exchanger. The indoor heat exchanger includes a right heat exchanger arranged in the housing cavity, and the right heat exchanger is arranged close to the right inlet of the upper wind blade cavity and the right inlet of the lower wind blade cavity.

9. The indoor unit of the cabinet air conditioner according to claim 8, characterized in that, The left heat exchanger includes an A1 heat exchange section and a B1 heat exchange section which are arranged oppositely up and down. The A1 heat exchange section is arranged close to the left inlet of the upper wind blade cavity, and the B1 heat exchange section is arranged close to the left inlet of the lower wind blade cavity; and / or, the right heat exchanger includes an A2 heat exchange section and a B2 heat exchange section which are arranged oppositely up and down. The A2 heat exchange section is arranged close to the right inlet of the upper wind blade cavity, and the B2 heat exchange section is arranged close to the right inlet of the lower wind blade cavity. When the floor-standing air conditioner indoor unit is in the lower air inlet and upper air outlet mode, indoor air can enter the lower air duct through the lower air inlet, enter the housing cavity through the lower return air inlet and the lower air guide duct, and part of the air enters the upper air blade cavity through the B1 heat exchange section, the A1 heat exchange section and the left inlet of the upper air blade cavity; another part of the air enters the upper air blade cavity through the B2 heat exchange section, the A2 heat exchange section and the right inlet of the upper air blade cavity; the air in the upper air blade cavity is discharged through the upper air duct and the upper air outlet. When the floor-standing air conditioner indoor unit is in the upper air inlet and lower air outlet mode, indoor air can enter the upper air duct through the upper air outlet, enter the housing cavity through the upper return air inlet and the upper air guide duct, and part of the air enters the lower air blade cavity through the A1 heat exchange section, the B1 heat exchange section and the left inlet of the lower air blade cavity; another part of the air enters the lower air blade cavity through the A2 heat exchange section, the B2 heat exchange section and the right inlet of the lower air blade cavity; the air in the lower air blade cavity is discharged through the lower air duct and the lower air outlet.

10. The cabinet-type air conditioner indoor unit according to claim 1, characterized in that, An upper air deflector is rotatably arranged at the upper air outlet, and the upper air deflector can open or close the upper air outlet or adjust the air outlet direction of the upper air outlet; and / or, A lower air deflector is rotatably arranged at the lower air outlet, and the lower air deflector can open or close the lower air outlet or adjust the air outlet direction of the lower air outlet.

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