Cabinet type air conditioner indoor unit

Abstract

The cabinet type air conditioner indoor unit comprises a shell and an air duct assembly, an upper air opening and an upper air inlet are formed in the upper portion of the shell, and a lower air opening and a lower air inlet are formed in the lower portion of the shell; an upper fan blade cavity and a lower fan blade cavity are formed in the air duct assembly; the upper air port is communicated with the outlet of the upper fan blade cavity A through an upper main air duct; the upper air port is communicated with the outlet of the lower fan blade cavity C through an upper auxiliary air duct; the lower air port is communicated with an outlet of the lower fan blade cavity D through a lower main air duct; the lower air port is communicated with an outlet of the upper fan blade cavity B through a lower auxiliary air duct; the upper main air duct forms an upper main return air inlet, and the upper auxiliary air duct forms an upper auxiliary return air inlet; the lower main air duct forms a lower main return air inlet, and the lower auxiliary air duct forms a lower auxiliary return air inlet; the indoor unit forms a first main flow path through which air enters from the lower main air duct and the lower auxiliary air duct and air exits from the upper main air duct and the upper auxiliary air duct at the same time, or a second main flow path through which air enters from the upper main air duct and the upper auxiliary air duct and air exits from the lower main air duct and the lower auxiliary air duct at the same time, or a third main flow path through which air exits from the upper main air duct and the lower main air duct at the same time.

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] In existing floor-standing air conditioner indoor units, upper and lower air outlets are formed on the side wall of the housing and are arranged opposite to each other up and down, and an air inlet is formed between the upper and lower air outlets; 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 outlet and air inlet of the indoor unit are relatively unchanged, the temperature of the indoor air is stratified in the height direction, the hot air with a small density accumulates on the upper side of the room, and the cold air with a large density accumulates on the lower side of the room, resulting in these indoor units being unable to balance the cooling and heating requirements, the temperature distribution of the indoor air being uneven, and the energy-saving and comfort effects being poor. Summary of the Invention

[0003] In view of this, the present invention provides a floor-standing air conditioner indoor unit to solve the problems that in existing floor-standing air conditioners, the relative positions of the air inlet and air outlet remain unchanged, resulting in the inability to balance the cooling and heating requirements, the uneven temperature distribution of the indoor air, and poor energy-saving and comfort effects.

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

[0005] The air duct assembly is arranged in the housing cavity, and the air duct assembly forms an upper air blade cavity and a lower air blade cavity that are arranged opposite to each other up and down; the upper air blade cavity forms an upper air blade cavity inlet, an upper air blade cavity A outlet, and an upper air blade cavity B outlet; the lower air blade cavity forms a lower air blade cavity inlet, a lower air blade cavity C outlet, and a lower air blade cavity D outlet; an upper main air duct is communicated between the upper air outlet and the upper air blade cavity A outlet, and an upper auxiliary air duct is communicated between the upper air outlet and the lower air blade cavity C outlet; a lower main air duct is communicated between the lower air outlet and the lower air blade cavity D outlet, and a lower auxiliary air duct is communicated between the lower air outlet and the upper air blade cavity B outlet; an upper main air return opening is formed on the side wall of the upper main air duct, and an upper auxiliary air return opening is formed on the side wall of the upper auxiliary air duct; a lower main air return opening is formed on the side wall of the lower main air duct, and a lower auxiliary air return opening is formed on the side wall of the lower auxiliary air duct;

[0006] The upper main air return opening communicates with the upper main air duct and the housing cavity, and the upper auxiliary air return opening communicates with the upper auxiliary air duct and the housing cavity; the lower main air return opening communicates with the lower main air duct and the housing cavity, and the lower auxiliary air return opening communicates with the lower auxiliary air duct and the housing cavity; an upper auxiliary flow path is formed between the upper air inlet and the housing cavity, and a lower auxiliary flow path is formed between the lower air inlet and the housing cavity;

[0007] The outlets of the upper air blade cavity A, the upper air blade cavity B, the lower air blade cavity C, the lower air blade cavity D, the upper main air return opening, the upper auxiliary air return opening, the lower main air return opening, and the lower auxiliary air return opening can all be controlled to be opened or closed, so that the cabinet-type air conditioner indoor unit can form a first main flow path in which air enters simultaneously from the lower main air duct and the lower auxiliary air duct and exits simultaneously from the upper main air duct and the upper auxiliary air duct, or a second main flow path in which air enters simultaneously from the upper main air duct and the upper auxiliary air duct and exits simultaneously from the lower main air duct and the lower auxiliary air duct, or a third main flow path in which air exits simultaneously from the upper main air duct and the lower main air duct.

[0008] Further optionally, when the lower main air return opening is in the open state, the upper main air return opening is in the closed state, the outlet of the upper air blade cavity B is in the closed state, the lower auxiliary air return opening is in the open state, and the upper auxiliary air return opening is in the closed state, the lower air inlet, the lower main air duct, the lower main air return opening, and the housing cavity are sequentially connected, the lower air inlet, the lower auxiliary air duct, the lower auxiliary air return opening, and the housing cavity are sequentially connected, the housing cavity, the inlet of the upper air blade cavity, the upper air blade cavity, the upper main air duct, and the upper air inlet are sequentially connected, and the housing cavity, the inlet of the lower air blade cavity, the lower air blade cavity, the upper auxiliary air duct, and the upper air inlet are sequentially connected, and the first main flow path can be formed between the upper air inlet and the lower air inlet;

[0009] When the lower main air return opening is in the closed state, the upper main air return opening is in the open state, the outlet of the lower air blade cavity C is in the closed state, the upper auxiliary air return opening is in the open state, and the lower auxiliary air return opening is in the closed state, the upper air inlet, the upper main air duct, the upper main air return opening, and the housing cavity are sequentially connected, the upper air inlet, the upper auxiliary air duct, the upper auxiliary air return opening, and the housing cavity are sequentially connected, the housing cavity, the inlet of the lower air blade cavity, the lower air blade cavity, the lower main air duct, and the lower air inlet are sequentially connected, and the housing cavity, the inlet of the upper air blade cavity, the upper air blade cavity, the lower auxiliary air duct, and the lower air inlet are sequentially connected, and the second main flow path can be formed between the upper air inlet and the lower air inlet;

[0010] When the upper main air return opening, the lower main air return opening, the upper auxiliary air return opening, the lower auxiliary air return opening, the outlet of the upper air blade cavity B, and the outlet of the lower air blade cavity C are all in the closed state, the housing cavity, the inlet of the upper air blade cavity, the upper air blade cavity, the upper main air duct, and the upper air inlet are sequentially connected, and the housing cavity, the inlet of the lower air blade cavity, the lower air blade cavity, the lower main air duct, and the lower air inlet are sequentially connected, and the third main flow path can be formed between the upper air inlet and the lower air inlet.

[0011] Further optionally, a first upper wind blocking structure is movably arranged at the upper main air return opening. The first upper wind blocking structure has a first working position for opening the upper main air return opening and closing the outlet of the upper airfoil cavity A, and a second working position for closing the upper main air return opening and opening the outlet of the upper airfoil cavity A;

[0012] A first lower wind blocking structure is movably arranged at the lower main air return opening. The first lower wind blocking structure has a third working position for opening the lower main air return opening and closing the outlet of the lower airfoil cavity D, and a fourth working position for closing the lower main air return opening and opening the outlet of the lower airfoil cavity D;

[0013] When the first upper wind blocking structure is in the second working position and the first lower wind blocking structure is in the third working position, the first main flow path can be formed between the upper air outlet and the lower air outlet; when the first upper wind blocking structure is in the first working position and the first lower wind blocking structure is in the fourth working position, the second main flow path can be formed between the upper air outlet and the lower air outlet; when the first upper wind blocking structure is in the second working position and the first lower wind blocking structure is in the fourth working position, the third main flow path can be formed between the upper air outlet and the lower air outlet.

[0014] Further optionally, an upper scroll tongue is movably arranged in the upper airfoil cavity. The structure of the upper scroll tongue is adapted to the profile structure of the upper airfoil cavity; the upper scroll tongue has a fifth working position for guiding the air in the upper airfoil cavity to the outlet of the upper airfoil cavity A and a sixth working position for guiding the air in the upper airfoil cavity to the outlet of the upper airfoil cavity B;

[0015] A lower scroll tongue is movably arranged in the lower airfoil cavity. The structure of the lower scroll tongue is adapted to the profile structure of the lower airfoil cavity; the lower scroll tongue has a seventh working position for guiding the air in the lower airfoil cavity to the outlet of the lower airfoil cavity C and an eighth working position for guiding the air in the lower airfoil cavity to the outlet of the lower airfoil cavity D;

[0016] When the upper scroll tongue is in the fifth working position and the lower scroll tongue is in the seventh working position, the first main flow path can be formed between the upper air outlet and the lower air outlet; when the upper scroll tongue is in the sixth working position and the lower scroll tongue is in the eighth working position, the second main flow path can be formed between the upper air outlet and the lower air outlet; when the upper scroll tongue is in the fifth working position and the lower scroll tongue is in the eighth working position, the third main flow path can be formed between the upper air outlet and the lower air outlet.

[0017] Further optionally, a second upper wind blocking structure is movably arranged at the upper auxiliary air return opening. The second upper wind blocking structure has a ninth working position for opening the upper auxiliary air return opening and a tenth working position for closing the upper auxiliary air return opening;

[0018] The lower secondary air return opening is movably provided with a second lower air damper structure, and the second lower air damper structure has an eleventh working position for opening the lower secondary air return opening and a twelfth working position for closing the lower secondary air return opening;

[0019] When the second upper air damper structure is in the tenth working position and the second lower air damper structure is in the eleventh working position, the first main air path can be formed between the upper air opening and the lower air opening; when the second upper air damper structure is in the ninth working position and the second lower air damper structure is in the twelfth working position, the second main air path can be formed between the upper air opening and the lower air opening; when the second upper air damper structure is in the tenth working position and the second lower air damper structure is in the twelfth working position, the third main air path can be formed between the upper air opening and the lower air opening.

[0020] Further optionally, the axial direction of the upper air vane cavity is along the horizontal direction; the inlet of the upper air vane cavity is formed at one axial end of the upper air vane cavity, the outlet A of the upper air vane cavity is formed at the top of the upper air vane cavity, and the outlet B of the upper air vane cavity is formed at the bottom of the lower air vane cavity;

[0021] The axial direction of the lower air vane cavity is along the horizontal direction; the inlet of the lower air vane cavity is formed at one axial end of the lower air vane cavity, the outlet C of the lower air vane cavity is formed at the top of the lower air vane cavity, and the outlet D of the lower air vane cavity is formed at the bottom of the lower air vane cavity.

[0022] Further optionally, the housing includes a rear side wall of the housing; both the inlet of the upper air vane cavity and the inlet of the lower air vane cavity face the rear side wall of the housing;

[0023] The cabinet-type air conditioner indoor unit further includes an indoor heat exchanger, and the indoor heat exchanger includes an upper heat exchange section and a lower heat exchange section. The upper heat exchange section is arranged between the rear side wall of the housing and the inlet of the upper air vane cavity, and the lower heat exchange section is arranged between the rear side wall of the housing and the inlet of the lower air vane cavity.

[0024] Further optionally, the housing further includes a top wall of the housing and a front side wall of the housing. The top wall of the housing forms the upper air opening, and the upper air opening includes an upper secondary air opening and an upper main air opening which are arranged opposite to each other in the front and rear; the front side wall of the housing is arranged at the front side of the bottom of the top wall of the housing, and the front side wall of the housing forms the lower air opening, and the lower air opening includes a lower secondary air opening and a lower main air opening which are arranged opposite to each other in the up and down;

[0025] The upper secondary air duct is arranged close to the front side wall of the housing and communicates with the upper secondary air opening; the upper main air duct is arranged at the rear side of the upper secondary air duct and communicates with the upper main air opening; the lower secondary air duct is arranged close to the front side wall of the housing and communicates with the lower secondary air opening, and the lower main air duct is arranged at the rear side of the lower secondary air duct and communicates with the lower main air opening.

[0026] Further optionally, from the outlet of the upper air blade cavity A to the direction of the upper main air outlet, the flow area of the upper main air duct gradually increases; from the outlet of the lower air blade cavity C to the direction of the upper auxiliary air outlet, the flow area of the upper auxiliary air duct gradually increases;

[0027] From the outlet of the lower air blade cavity D to the direction of the lower main air outlet, the flow area of the lower main air duct gradually increases; from the outlet of the upper air blade cavity B to the direction of the lower auxiliary air outlet, the flow area of the lower auxiliary air duct gradually increases.

[0028] Further optionally, both the upper auxiliary air return opening and the lower auxiliary air return opening are located between the axes of the upper air blade cavity and the lower air blade cavity.

[0029] Compared with the prior art, the beneficial effects of the present invention mainly lie in:

[0030] Taking into account the cooling and heating requirements, making full use of the principle that cold air sinks during cooling and hot air rises during heating, so that the air flow forms a large swirling eddy in the room where the indoor unit is located, improving the temperature change speed of the indoor air, making the temperature distribution of the indoor air uniform and the flow rate stable, shortening the time required for the room where the indoor unit is located to reach the set temperature, having good energy-saving effect, and improving the comfort of the air; there are no air inlets on the rear side walls of the housing, reducing the installation space of the indoor unit and expanding the installable range of the indoor unit; the air can be supplied through both the main air duct and the auxiliary air duct, increasing the air supply volume and the adjustment speed of the indoor air, and solving the problem that the small air supply volume during reversible air supply of the cabinet-type air conditioner indoor unit affects the comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] 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 described below are only exemplary, and for those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained based on the provided drawings.

[0032] The structures, ratios, sizes, etc. illustrated in this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limited conditions under which the present invention can be implemented. Therefore, they do not have technical substance significance. Any modification of the structure, change of 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.

[0033] 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;

[0034] Figure 2 Exploded structural schematic diagram of an indoor unit of a cabinet air conditioner provided by the present invention;

[0035] Figure 3 Axonometric structural schematic diagram of an embodiment of an air duct assembly (without upper and lower air ducts) provided by the present invention;

[0036] Figure 4a 、 Figure 4b 、 Figure 4c and Figure 4d Assembly structural schematic diagram of an embodiment of an air duct assembly (without upper and lower air ducts) provided by the present invention;

[0037] Figure 5 Assembly structural schematic diagram of an embodiment of an air duct assembly (without upper and lower air ducts) and an indoor heat exchanger provided by the present invention;

[0038] Figure 6a 、 Figure 6b and Figure 6c Structural schematic diagram of an embodiment when the indoor unit of the cabinet air conditioner is in the upper air outlet mode provided by the present invention;

[0039] Figure 7a 、 Figure 7b and Figure 7c Structural schematic diagram of an embodiment when the indoor unit of the cabinet air conditioner is in the lower air outlet mode provided by the present invention;

[0040] Figure 8a and Figure 8b Structural schematic diagram of an embodiment when the indoor unit of the cabinet air conditioner is in the upper and lower simultaneous air outlet mode provided by the present invention;

[0041] In the figure:

[0042] 1 - housing; 11 - front side wall of the housing; 111 - lower auxiliary air outlet; 112 - lower main air outlet; 12 - rear side wall of the housing; 121 - lower air inlet; 13 - top wall of the housing; 131 - upper air outlet; 132 - upper air inlet; 14 - housing cavity; 15 - base;

[0043] 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 A outlet; 233 - upper air blade cavity B outlet; 234 - upper air blade; 24 - lower air blade cavity; 241 - lower air blade cavity inlet; 242 - lower air blade cavity C outlet; 243 - lower air blade cavity D outlet; 244 - lower air blade; 251 - upper main air duct; 252 - upper main air return opening; 253 - upper auxiliary air duct; 254 - upper auxiliary air return opening; 261 - lower main air duct; 262 - lower main air return opening; 263 - lower auxiliary air duct; 264 - lower auxiliary air return opening; 27 - upper ventilation shell; 271 - upper ventilation duct; 28 - lower ventilation shell; 281 - lower ventilation duct;

[0044] 311 - The first upper windscreen structure; 312 - The second upper windscreen structure; 321 - The first lower windscreen structure; 322 - The second lower windscreen structure; 331 - The upper volute tongue; 332 - The lower volute tongue; 41 - The upper heat exchange section; 42 - The lower heat exchange section. Detailed implementation manners

[0045] 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 them. 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.

[0046] 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 "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.

[0047] It should be understood that the term "and / or" used herein is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0048] It should also be noted that the term "comprises", "comprising" or any other variation thereof is intended to cover a non-exclusive inclusion, so that a commodity or system including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such commodity or system. Without further limitation, the element defined by the statement "comprising a..." does not exclude the existence of additional identical elements in the commodity or system including the said element.

[0049] In the existing cabinet-type air conditioner indoor unit, upper and lower air outlets which are arranged opposite to each other up and down and an air inlet formed between the upper air outlet and the lower air outlet are formed on the side wall of the housing; by blowing air through the upper air outlet, shower cooling can be realized, and by blowing air through the lower air outlet, carpet heating can be realized; however, the air inlet is located at the back of the indoor unit, and during installation, a certain safety distance needs to be reserved between the indoor unit and the wall, resulting in a large installation space for the indoor unit; 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, small air supply volume, slow temperature change of the indoor air, and the time required for the room where the indoor unit is located to reach the set temperature;

[0050] The present invention creatively provides a cabinet-type air conditioner indoor unit, which includes a housing and an air duct assembly. An upper air outlet and an upper air inlet are formed in the upper part of the housing, and a lower air outlet and a lower air inlet are formed in the lower part of the housing; a housing cavity is formed inside the housing; the air duct assembly is arranged in the housing cavity and forms an upper air blade cavity and a lower air blade cavity which are arranged opposite to each other up and down; an upper main air duct is communicated between the upper air outlet and the A outlet of the upper air blade cavity, and an upper auxiliary air duct is communicated between the upper air outlet and the C outlet of the lower air blade cavity; a lower main air duct is communicated between the lower air outlet and the D outlet of the lower air blade cavity, and a lower auxiliary air duct is communicated between the lower air outlet and the B outlet of the upper air blade cavity; an upper main air return opening is formed on the side wall of the upper main air duct, and an upper auxiliary air return opening is formed on the side wall of the upper auxiliary air duct; a lower main air return opening is formed on the side wall of the lower main air duct, and a lower auxiliary air return opening is formed on the side wall of the lower auxiliary air duct; the upper main air return opening communicates the upper main air duct and the housing cavity, and the upper auxiliary air return opening communicates the upper auxiliary air duct and the housing cavity; the lower main air return opening communicates the lower main air duct and the housing cavity, and the lower auxiliary air return opening communicates the lower auxiliary air duct and the housing cavity; an upper auxiliary flow path is formed between the upper air inlet and the housing cavity, and a lower auxiliary flow path is formed between the lower air inlet and the housing cavity;

[0051] The A outlet of the upper air blade cavity, the B outlet of the upper air blade cavity, the C outlet of the lower air blade cavity, the D outlet of the lower air blade cavity, the upper main air return opening, the upper auxiliary air return opening, the lower main air return opening and the lower auxiliary air return opening can all be controlled to be opened or closed, so that the cabinet-type air conditioner indoor unit can form a first main flow path in which the lower main air duct and the lower auxiliary air duct intake air simultaneously and the upper main air duct and the upper auxiliary air duct blow air simultaneously, or a second main flow path in which the upper main air duct and the upper auxiliary air duct intake air simultaneously and the lower main air duct and the lower auxiliary air duct blow air simultaneously, or a third main flow path in which the upper main air duct and the lower main air duct blow air simultaneously;

[0052] Taking into account the cooling and heating requirements, making full use of the principle that cold air sinks during cooling and hot air rises during heating, a large swirling eddy current is formed in the room where the indoor unit is located, which improves the temperature change speed of the indoor air, makes the temperature distribution of the indoor air uniform and the flow rate stable, shortens the time required for the room where the indoor unit is located to reach the set temperature, has good energy-saving effect, and improves the comfort of the air; solving the problem that the temperature distribution of the indoor air is uneven under a certain working condition due to the fixed positions of the upper air outlet and the lower air outlet in the existing cabinet air conditioner; there are no air inlets on the rear side walls of the housing, reducing the installation space of the indoor unit and expanding the installable range of the indoor unit; air can be supplied through both the main air duct and the auxiliary air duct, increasing the air supply volume and the adjustment speed of the indoor air, solving the problem that the small air supply volume during reversible air supply of the indoor unit of the cabinet air conditioner affects the comfort, and solving the problem that the energy saving and comfort experience of the indoor unit of the cabinet air conditioner cannot reach the best at the same time under different working conditions.

[0053] As Figures 1 to 8b shown, this embodiment provides a cabinet air conditioner indoor unit, which includes a housing 1 and an air duct assembly 2. An upper air outlet 131 and an upper air inlet 132 are formed at the upper part of the housing 1, and a lower air outlet and a lower air inlet 121 are formed at the lower part of the housing 1; a housing cavity 14 is formed inside the housing 1, and the housing cavity 14 is communicated with the upper air outlet, the upper air inlet 132, the lower air outlet, and the lower air inlet 121;

[0054] The air duct assembly 2 is arranged in the housing cavity 14, and the air duct assembly 2 forms an upper air blade cavity 23 and a lower air blade cavity 24 which are arranged opposite to each other up and down; the upper air blade cavity 23 forms an upper air blade cavity inlet 231, an upper air blade cavity A outlet 232, and an upper air blade cavity B outlet 233; the lower air blade cavity 24 forms a lower air blade cavity inlet 241, a lower air blade cavity C outlet 242, and a lower air blade cavity D outlet 243; an upper main air duct 251 is communicated between the upper air outlet and the upper air blade cavity A outlet 232, and an upper auxiliary air duct 253 is communicated between the upper air outlet and the lower air blade cavity C outlet 242; a lower main air duct 261 is communicated between the lower air outlet and the lower air blade cavity D outlet 243, and a lower auxiliary air duct 263 is communicated between the lower air outlet and the upper air blade cavity B outlet 233; an upper main air return opening 252 is formed on the side wall of the upper main air duct 251, and an upper auxiliary air return opening 254 is formed on the side wall of the upper auxiliary air duct 253; a lower main air return opening 262 is formed on the side wall of the lower main air duct 261, and a lower auxiliary air return opening 264 is formed on the side wall of the lower auxiliary air duct 263;

[0055] The upper main air return opening 252 connects the upper main air duct 251 and the housing cavity 14, and the air in the upper main air duct 251 can enter the housing cavity 14 through the upper main air return opening 252; the upper secondary air return opening 254 connects the upper secondary air duct 253 and the housing cavity 14, and the air in the upper secondary air duct 253 can enter the housing cavity 14 through the upper secondary air return opening 254; the lower main air return opening 262 connects the lower main air duct 261 and the housing cavity 14, and the air in the lower main air duct 261 can enter the housing cavity 14 through the lower main air return opening 262; the lower secondary air return opening 264 connects the lower secondary air duct 263 and the housing cavity 14, and the air in the lower secondary air duct 263 can enter the housing cavity 14 through the lower secondary air return opening 264; the upper airfoil cavity inlet 231 connects the upper airfoil cavity 23 and the housing cavity 14, and the air in the housing cavity 14 can enter the upper airfoil cavity 23 through the upper airfoil cavity inlet 231; the lower airfoil cavity inlet 241 connects the lower airfoil cavity 24 and the housing cavity 14, and the air in the housing cavity 14 can enter the lower airfoil cavity 24 through the lower airfoil cavity inlet 241; the upper air inlet 132 is connected to the housing cavity 14 and forms an upper auxiliary flow path, and indoor air can enter the upper auxiliary flow path through the upper air inlet 132; the lower air inlet 121 is connected to the housing cavity 14 and forms a lower auxiliary flow path, and indoor air can enter the lower auxiliary flow path through the lower air inlet 121;

[0056] The upper airfoil cavity A outlet 232, the upper airfoil cavity B outlet 233, the lower airfoil cavity C outlet 242, the lower airfoil cavity D outlet 243, the upper main air return opening 252, the upper secondary air return opening 254, the lower main air return opening 262 and the lower secondary air return opening 264 can all be controlled to open or close, so that the indoor unit of the cabinet air conditioner can form a first main flow path with air entering simultaneously from the lower main air duct 261 and the lower secondary air duct 263 and air exiting simultaneously from the upper main air duct 251 and the upper secondary air duct 253, or a second main flow path with air entering simultaneously from the upper main air duct 251 and the upper secondary air duct 253 and air exiting simultaneously from the lower main air duct 261 and the lower secondary air duct 263, or a third main flow path with air exiting simultaneously from the upper main air duct 251 and the lower main air duct 261;

[0057] Specifically, the upper secondary air duct 253 includes a front side wall of the upper secondary air duct, and the front side wall of the upper secondary air duct is correspondingly arranged with the front side wall 11 of the housing, and the front side wall of the upper secondary air duct forms the upper secondary air return opening 254;

[0058] The lower secondary air duct 263 includes a front side wall of the lower secondary air duct, and the front side wall of the lower secondary air duct is correspondingly arranged with the front side wall 11 of the housing, and the front side wall of the lower secondary air duct forms the lower secondary air return opening 264;

[0059] Both the upper secondary air return opening 254 and the lower secondary air return opening 264 are located between the axis of the upper airfoil cavity 23 and the axis of the lower airfoil cavity 24.

[0060] Further, the lower main air return opening 262 is in an open state, the outlet 242 of the lower air blade cavity C is in an open state, and the outlet 243 of the lower air blade cavity D is in a closed state. The lower air outlet, the lower main air duct 261, the lower main air return opening 262, and the housing cavity 14 are connected in sequence; the lower auxiliary air return opening 264 is in an open state, and the lower air outlet, the lower auxiliary air duct 263, the lower auxiliary air return opening 264, and the housing cavity 14 are connected in sequence; the upper main air return opening 252 is in a closed state, the outlet 232 of the upper air blade cavity A is in an open state, and the outlet 233 of the upper air blade cavity B is in a closed state. The housing cavity 14, the inlet 231 of the upper air blade cavity, the upper air blade cavity 23, the upper main air duct 251, and the upper air outlet 131 are connected in sequence; the upper auxiliary air return opening 254 is in a closed state, and the housing cavity 14, the inlet 241 of the lower air blade cavity, the lower air blade cavity 24, the upper auxiliary air duct 253, and the upper air outlet 131 are connected in sequence. A first main flow path can be formed between the upper air outlet 131 and the lower air outlet;

[0061] The upper main air return opening 252 is in an open state, the outlet 232 of the upper air blade cavity A is in a closed state, and the outlet 233 of the upper air blade cavity B is in an open state; the upper air outlet 131, the upper main air duct 251, the upper main air return opening 252, and the housing cavity 14 are connected in sequence; the upper auxiliary air return opening 254 is in an open state, and the upper air outlet 131, the upper auxiliary air duct 253, the upper auxiliary air return opening 254, and the housing cavity 14 are connected in sequence; the lower main air return opening 262 is in a closed state, the outlet 242 of the lower air blade cavity C is in a closed state, and the outlet 243 of the lower air blade cavity D is in an open state. The housing cavity 14, the inlet 241 of the lower air blade cavity, the lower air blade cavity 24, the lower main air duct 261, and the lower air outlet are connected in sequence; the lower auxiliary air return opening 264 is in a closed state, and the housing cavity 14, the inlet 231 of the upper air blade cavity, the upper air blade cavity 23, the lower auxiliary air duct 263, and the lower air outlet are connected in sequence. A second main flow path can be formed between the upper air outlet 131 and the lower air outlet;

[0062] When the upper main air return opening 252, the upper auxiliary air return opening 254, and the outlet 233 of the upper air blade cavity B are all in a closed state and the outlet 232 of the upper air blade cavity A is in an open state, the housing cavity 14, the inlet 231 of the upper air blade cavity, the upper air blade cavity 23, the upper main air duct 251, and the upper air outlet 131 are connected in sequence; when the lower main air return opening 262, the lower auxiliary air return opening 264, and the outlet 242 of the lower air blade cavity C are all in a closed state and the outlet 243 of the lower air blade cavity D is in an open state, the housing cavity 14, the inlet 241 of the lower air blade cavity, the lower air blade cavity 24, the lower main air duct 261, and the lower air outlet are connected in sequence. A third main flow path can be formed between the upper air outlet 131 and the lower air outlet.

[0063] Specifically, the air duct assembly 2 includes a main volute 21, a volute cover 22, an upper auxiliary volute and a lower auxiliary volute. The main volute 21 and the volute cover 22 are cooperatively connected to form an upper main air duct 251, an upper air blade cavity 23, a lower air blade cavity 24, and a lower main air duct 261 that are sequentially arranged from top to bottom. The upper auxiliary volute and the volute cover 22 are cooperatively connected to form an upper auxiliary air duct 253, and the upper auxiliary air duct 253 is horizontally arranged side by side with the upper main air duct 251 and the upper air blade cavity 23. The lower auxiliary volute and the volute cover 22 are cooperatively connected to form a lower auxiliary air duct 263, and the lower auxiliary air duct 263 is horizontally arranged side by side with the lower main air duct 261 and the lower air blade cavity 24. An upper air blade 234 is rotatably arranged in the upper air blade cavity 23, and a lower air blade 244 is rotatably arranged in the lower air blade cavity 24.

[0064] Further, a first upper wind blocking structure 311 is movably arranged at the upper main air return opening 252. The first upper wind blocking structure 311 has a first working position for opening the upper main air return opening 252 while closing the outlet 232 of the upper air blade cavity A and a second working position for closing the upper main air return opening 252 while opening the outlet 232 of the upper air blade cavity A. Preferably, the first upper wind blocking structure 311 is a first upper baffle.

[0065] A first lower wind blocking structure 321 is movably arranged at the lower main air return opening 262. The first lower wind blocking structure 321 has a third working position for opening the lower main air return opening 262 while closing the outlet 243 of the lower air blade cavity D and a fourth working position for closing the lower main air return opening 262 while opening the outlet 243 of the lower air blade cavity D. Preferably, the first lower wind blocking structure 321 is a first lower baffle.

[0066] When the first upper wind blocking structure 311 is in the second working position and the first lower wind blocking structure 321 is in the third working position, a first main flow path can be formed between the upper air outlet and the lower air outlet. When the first upper wind blocking structure 311 is in the first working position and the first lower wind blocking structure 321 is in the fourth working position, a second main flow path can be formed between the upper air outlet and the lower air outlet. When the first upper wind blocking structure 311 is in the second working position and the first lower wind blocking structure 321 is in the fourth working position, a third main flow path can be formed between the upper air outlet 131 and the lower air outlet.

[0067] The floor-standing air conditioner indoor unit is provided with an upper air outlet mode and a lower air outlet mode. When the floor-standing air conditioner indoor unit is in the upper air outlet mode, the upper auxiliary flow path is connected, and the indoor air near the upper air inlet 132 can enter the upper auxiliary flow path through the upper air inlet 132; the lower auxiliary flow path is connected, and the indoor air near the lower air inlet 121 can enter the lower auxiliary flow path through the lower air inlet 121; the first upper wind deflector structure 311 is in the second working position, and the first lower wind deflector structure 321 is in the third working position; the indoor air near the lower air outlet can enter the housing cavity 14 through the lower main air duct 261 and the lower main air return opening 262, and a part of the air in the housing cavity 14 enters the upper air blade cavity 23 through the upper air blade cavity inlet 231, and then is discharged through the upper main air duct 251 and the upper air outlet; another part of the air in the housing cavity 14 enters the lower air blade cavity 24 through the lower air blade cavity inlet 241, and then is discharged through the upper auxiliary air duct 253 and the upper air outlet;

[0068] When the floor-standing air conditioner indoor unit is in the lower air outlet mode, the upper auxiliary flow path is connected, and the indoor air near the upper air inlet 132 can enter the upper auxiliary flow path through the upper air inlet 132; the lower auxiliary flow path is connected, and the indoor air near the lower air inlet 121 can enter the lower auxiliary flow path through the lower air inlet 121; the first upper wind deflector structure 311 is in the first working position, and the first lower wind deflector structure 321 is in the fourth working position; the indoor air near the upper air outlet can enter the housing cavity 14 through the upper main air duct 251 and the upper main air return opening 252, and a part of the air in the housing cavity 14 enters the lower air blade cavity 24 through the lower air blade cavity inlet 241, and then is discharged through the lower main air duct 261 and the lower air outlet; another part of the air in the housing cavity 14 enters the upper air blade cavity 23 through the upper air blade cavity inlet 231, and then is discharged through the lower auxiliary air duct 263 and the lower air outlet;

[0069] When the floor-standing air conditioner indoor unit is in the upper and lower simultaneous air outlet mode, when the upper auxiliary flow path is connected, the indoor air near the upper air inlet 132 can enter the upper auxiliary flow path through the upper air inlet 132; when the lower auxiliary flow path is connected, the indoor air near the lower air inlet 121 can enter the lower auxiliary flow path through the lower air inlet 121; the first upper wind deflector structure 311 is in the second working position, and the first lower wind deflector structure 321 is in the fourth working position; a part of the air in the housing cavity 14 enters the lower air blade cavity 24 through the lower air blade cavity inlet 241, and then is discharged through the lower main air duct 261 and the lower air outlet; another part of the air in the housing cavity 14 enters the upper air blade cavity 23 through the upper air blade cavity inlet 231, and then is discharged through the upper main air duct 251 and the upper air outlet.

[0070] Regarding the problem that the air in the upper impeller cavity 23 cannot be smoothly discharged through the upper impeller cavity A outlet 232 or the upper impeller cavity B outlet 233, this embodiment proposes that an upper scroll tongue is movably arranged in the upper impeller cavity 23, and the structure of the upper scroll tongue is adapted to the profile structure of the upper impeller cavity 23; the upper scroll tongue has a fifth working position for guiding the air in the upper impeller cavity 23 to the upper impeller cavity A outlet 232 and a sixth working position for guiding the air in the upper impeller cavity 23 to the upper impeller cavity B outlet 233;

[0071] Regarding the problem that the air in the lower impeller cavity 24 cannot be smoothly discharged through the lower impeller cavity C outlet 242 or the lower impeller cavity D outlet 243, this embodiment proposes that a lower scroll tongue is movably arranged in the lower impeller cavity 24, and the structure of the lower scroll tongue is adapted to the profile structure of the lower impeller cavity 24; the lower scroll tongue has a seventh working position for guiding the air in the lower impeller cavity 24 to the lower impeller cavity C outlet 242 and an eighth working position for guiding the air in the lower impeller cavity 24 to the lower impeller cavity D outlet 243;

[0072] When the upper scroll tongue is in the fifth working position and the lower scroll tongue is in the seventh working position, a first main flow path can be formed between the upper air inlet and the lower air outlet; when the upper scroll tongue is in the sixth working position and the lower scroll tongue is in the eighth working position, a second main flow path can be formed between the upper air inlet and the lower air outlet; when the upper scroll tongue 331 is in the fifth working position and the lower scroll tongue 332 is in the eighth working position, a third main flow path can be formed between the upper air inlet 131 and the lower air outlet.

[0073] In addition, a second upper air dam structure 312 is movably arranged at the upper auxiliary air return opening 254, and the second upper air dam structure 312 has a ninth working position for opening the upper auxiliary air return opening 254 and a tenth working position for closing the upper auxiliary air return opening 254;

[0074] A second lower air dam structure 322 is movably arranged at the lower auxiliary air return opening 264, and the second lower air dam structure 322 has an eleventh working position for opening the lower auxiliary air return opening 264 and a twelfth working position for closing the lower auxiliary air return opening 264;

[0075] When the second upper air dam structure 312 is in the tenth working position and the second lower air dam structure 322 is in the eleventh working position, a first main flow path can be formed between the upper air inlet 131 and the lower air outlet; when the second upper air dam structure 312 is in the ninth working position and the second lower air dam structure 322 is in the twelfth working position, a second main flow path can be formed between the upper air inlet 131 and the lower air outlet; when the second upper air dam structure 312 is in the tenth working position and the second lower air dam structure 322 is in the twelfth working position, a third main flow path can be formed between the upper air inlet 131 and the lower air outlet;

[0076] In summary, when the first upper wind shield structure is in the second working position, the first lower wind shield structure is in the third working position, the second upper wind shield structure is in the tenth working position, the second lower wind shield structure is in the eleventh working position, and the upper volute tongue is in the fifth working position and the lower volute tongue is in the seventh working position, a first main flow path can be formed between the upper air outlet and the lower air outlet; the air near the lower air outlet can enter the housing cavity through the lower main air duct and the lower main air return opening, or enter the housing cavity through the lower auxiliary air duct and the lower auxiliary air return opening; a part of the air in the housing cavity enters the lower wind blade cavity through the lower wind blade cavity inlet, and then is discharged through the upper auxiliary air duct and the upper air outlet; another part of the air in the housing cavity enters the upper wind blade cavity through the upper wind blade cavity inlet, and then is discharged through the upper main air duct and the upper air outlet;

[0077] When the first upper wind shield structure is in the first working position, the first lower wind shield structure is in the fourth working position, the second upper wind shield structure is in the ninth working position, the second lower wind shield structure is in the twelfth working position, a second main flow path can be formed between the upper air outlet and the lower air outlet; the air near the upper air outlet can enter the housing cavity through the upper main air duct and the upper main air return opening, or enter the housing cavity through the upper auxiliary air duct and the upper auxiliary air return opening; a part of the air in the housing cavity enters the upper wind blade cavity through the upper wind blade cavity inlet, and then is discharged through the lower auxiliary air duct and the lower air outlet; another part of the air in the housing cavity enters the lower wind blade cavity through the lower wind blade cavity inlet, and then is discharged through the lower main air duct and the lower air outlet;

[0078] When the first upper wind shield structure 311 is in the second working position, the first lower wind shield structure 321 is in the fourth working position, the second upper wind shield structure 312 is in the tenth working position, the second lower wind shield structure 322 is in the twelfth working position, the upper volute tongue 331 is in the fifth working position and the lower volute tongue 332 is in the eighth working position, a third main flow path can be formed between the upper air outlet 131 and the lower air outlet; the indoor air near the upper air inlet 132 can enter the housing cavity 14 through the upper air inlet 132, and the indoor air near the lower air inlet 121 can enter the housing cavity 14 through the lower air inlet 121; a part of the air in the housing cavity 14 can enter the upper wind blade cavity through the upper wind blade cavity inlet 231, and the air in the upper wind blade cavity 23 is discharged through the upper main air duct 251 and the upper air outlet; another part of the air in the housing cavity 14 can enter the lower wind blade cavity through the lower wind blade cavity inlet 241, and the air in the lower wind blade cavity 24 is discharged through the lower main air duct 261 and the lower air outlet; thus realizing simultaneous upper and lower air outlet.

[0079] Aiming at the problem that the unreasonable structural design of the upper wind blade cavity 23 and the lower wind blade cavity 24 leads to large air flow resistance, in this embodiment, it is proposed that the axial direction of the upper wind blade cavity 23 is along the horizontal direction; the upper wind blade cavity inlet 231 is formed at one axial end of the upper wind blade cavity 23, the upper wind blade cavity A outlet 232 is formed at the top of the upper wind blade cavity 23, and the upper wind blade cavity B outlet 233 is formed at the bottom of the lower wind blade cavity 24;

[0080] The axial direction of the lower wind blade cavity 24 is horizontal; the lower wind blade cavity inlet 241 is formed at one axial end of the lower wind blade cavity 24, the lower wind blade cavity C outlet 242 is formed at the top of the lower wind blade cavity 24, and the lower wind blade cavity D outlet 243 is formed at the bottom of the lower wind blade cavity 24.

[0081] In view of the problem that the unreasonable structural design of the housing 1 leads to insufficient air supply, in this embodiment, it is proposed that the housing 1 includes a housing top wall 13, a housing front side wall 11, a housing rear side wall 12, and a base 15. The housing top wall 13 is formed with an upper air inlet and an upper air inlet 132, and the upper air inlet 132 is located at the rear side of the upper air inlet 131; the housing front side wall 11 is arranged at the front side of the bottom of the housing top wall 13, and a lower air inlet is formed at the lower part of the housing front side wall 11. The lower air inlet includes a lower auxiliary air inlet 111 and a lower main air inlet 112 which are arranged opposite to each other up and down; a lower air inlet 121 is formed at the lower part of the housing rear side wall 12; the base 15 is arranged at the bottom of the housing front side wall 11 and the housing rear side wall 12.

[0082] The upper auxiliary air duct 253 is arranged close to the housing front side wall 11 and communicates with the upper air inlet 131; the upper main air duct 251 is arranged at the rear side of the upper auxiliary air duct 253 and communicates with the upper air inlet 131; the lower auxiliary air duct 263 is arranged close to the housing front side wall 11 and communicates with the lower auxiliary air inlet 111, and the lower main air duct 261 is arranged at the rear side of the lower auxiliary air duct 263 and communicates with the lower main air inlet 112.

[0083] Furthermore, both the upper wind blade cavity inlet 231 and the lower wind blade cavity inlet 241 face the housing rear side wall 12.

[0084] The cabinet-type air conditioner indoor unit further includes an indoor heat exchanger. The indoor heat exchanger includes an upper heat exchange section 41 and a lower heat exchange section 42. The upper heat exchange section 41 is arranged between the housing rear side wall 12 and the upper wind blade cavity inlet 231, and the lower heat exchange section 42 is arranged between the housing rear side wall 12 and the lower wind blade cavity inlet 241.

[0085] The air duct assembly 2 further includes an upper ventilation housing 27 and a lower ventilation housing 28. Both the upper ventilation housing 27 and the lower ventilation housing 28 are arranged in the housing cavity 14; the upper ventilation housing 27 is arranged at the top of the upper main air duct 251 and the upper auxiliary air duct 253 and is formed with an upper ventilation duct 271. The upper ventilation duct 271 communicates the upper air inlet with the upper main air duct 251 and the upper air inlet with the upper auxiliary air duct 253.

[0086] The lower ventilation housing 28 is arranged at the bottom of the lower main air duct 261 and the lower auxiliary air duct 263 and is formed with a lower ventilation duct 281. The lower ventilation duct 281 communicates the lower air inlet with the lower main air duct 261 and the lower air inlet with the lower auxiliary air duct 263.

[0087] 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, arrangements, or implementation methods described herein; rather, 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. An upper air inlet and an upper inlet air vent are formed at the upper part of the housing, and a lower air outlet and a lower inlet air vent are formed at the lower part of the housing. A housing cavity is formed inside the housing, and the housing cavity is communicated with the upper air inlet, the upper inlet air vent, the lower air outlet, and the lower inlet air vent. The air duct assembly is arranged in the housing cavity, and the air duct assembly forms an upper air blade cavity and a lower air blade cavity which are arranged oppositely up and down. The upper air blade cavity forms an upper air blade cavity inlet, an upper air blade cavity A outlet, and an upper air blade cavity B outlet. The lower air blade cavity forms a lower air blade cavity inlet, a lower air blade cavity C outlet, and a lower air blade cavity D outlet. An upper main air duct is communicated between the upper air inlet and the upper air blade cavity A outlet, and an upper auxiliary air duct is communicated between the upper air inlet and the lower air blade cavity C outlet. A lower main air duct is communicated between the lower air outlet and the lower air blade cavity D outlet, and a lower auxiliary air duct is communicated between the lower air outlet and the upper air blade cavity B outlet. An upper main air return opening is formed on the side wall of the upper main air duct, and an upper auxiliary air return opening is formed on the side wall of the upper auxiliary air duct. A lower main air return opening is formed on the side wall of the lower main air duct, and a lower auxiliary air return opening is formed on the side wall of the lower auxiliary air duct. The upper main air return opening communicates the upper main air duct and the housing cavity, and the upper auxiliary air return opening communicates the upper auxiliary air duct and the housing cavity. The lower main air return opening communicates the lower main air duct and the housing cavity, and the lower auxiliary air return opening communicates the lower auxiliary air duct and the housing cavity. An upper auxiliary flow path is formed between the upper inlet air vent and the housing cavity, and a lower auxiliary flow path is formed between the lower inlet air vent and the housing cavity. The upper air blade cavity A outlet, the upper air blade cavity B outlet, the lower air blade cavity C outlet, the lower air blade cavity D outlet, the upper main air return opening, the upper auxiliary air return opening, the lower main air return opening, and the lower auxiliary air return opening can all be controlled to be opened or closed, so that the indoor unit of the cabinet air conditioner can form a first main flow path in which air enters simultaneously through the lower main air duct and the lower auxiliary air duct and exits simultaneously through the upper main air duct and the upper auxiliary air duct, or a second main flow path in which air enters simultaneously through the upper main air duct and the upper auxiliary air duct and exits simultaneously through the lower main air duct and the lower auxiliary air duct, or a third main flow path in which air exits simultaneously through the upper main air duct and the lower main air duct.

2. The cabinet-type air conditioner indoor unit according to claim 1, characterized in that, When the lower main air return opening is in an open state, the upper main air return opening is in a closed state, the upper air blade cavity B outlet is in a closed state, the lower auxiliary air return opening is in an open state, and the upper auxiliary air return opening is in a closed state, the lower air outlet, the lower main air duct, the lower main air return opening, and the housing cavity are communicated in sequence, the lower air outlet, the lower auxiliary air duct, the lower auxiliary air return opening, and the housing cavity are communicated in sequence, the housing cavity, the upper air blade cavity inlet, the upper air blade cavity, the upper main air duct, and the upper air outlet are communicated in sequence, and the housing cavity, the lower air blade cavity inlet, the lower air blade cavity, the upper auxiliary air duct, and the upper air outlet are communicated in sequence. The first main flow path can be formed between the upper air outlet and the lower air outlet. When the lower main air return opening is in a closed state, the upper main air return opening is in an open state, the outlet of the lower air blade cavity C is in a closed state, the upper auxiliary air return opening is in an open state and the lower auxiliary air return opening is in a closed state, the upper air outlet, the upper main air duct, the upper main air return opening and the housing cavity are connected in sequence, the upper air outlet, the upper auxiliary air duct, the upper auxiliary air return opening and the housing cavity are connected in sequence, the housing cavity, the inlet of the lower air blade cavity, the lower air blade cavity, the lower main air duct and the lower air outlet are connected in sequence, and the housing cavity, the inlet of the upper air blade cavity, the upper air blade cavity, the lower auxiliary air duct and the lower air outlet are connected in sequence. A second main flow path can be formed between the upper air outlet and the lower air outlet; When the upper main air return opening, the lower main air return opening, the upper auxiliary air return opening, the lower auxiliary air return opening, the outlet of the upper air blade cavity B and the outlet of the lower air blade cavity C are all in a closed state, the housing cavity, the inlet of the upper air blade cavity, the upper air blade cavity, the upper main air duct and the upper air outlet are connected in sequence, and the housing cavity, the inlet of the lower air blade cavity, the lower air blade cavity, the lower main air duct and the lower air outlet are connected in sequence. A third main flow path can be formed between the upper air outlet and the lower air outlet.

3. The cabinet-type air conditioner indoor unit according to claim 2, characterized in that, A first upper air baffle structure is movably arranged at the upper main air return opening. The first upper air baffle structure has a first working position for opening the upper main air return opening while closing the outlet of the upper air blade cavity A and a second working position for closing the upper main air return opening while opening the outlet of the upper air blade cavity A; A first lower air baffle structure is movably arranged at the lower main air return opening. The first lower air baffle structure has a third working position for opening the lower main air return opening while closing the outlet of the lower air blade cavity D and a fourth working position for closing the lower main air return opening while opening the outlet of the lower air blade cavity D; When the first upper air baffle structure is in the second working position and the first lower air baffle structure is in the third working position, a first main flow path can be formed between the upper air outlet and the lower air outlet; When the first upper air baffle structure is in the first working position and the first lower air baffle structure is in the fourth working position, a second main flow path can be formed between the upper air outlet and the lower air outlet; when the first upper air baffle structure is in the second working position and the first lower air baffle structure is in the fourth working position, a third main flow path can be formed between the upper air outlet and the lower air outlet.

4. The cabinet-type air conditioner indoor unit according to claim 2, wherein, An upper volute tongue is movably arranged in the upper air blade cavity. The structure of the upper volute tongue is adapted to the profile structure of the upper air blade cavity; the upper volute tongue has a fifth working position for guiding the air in the upper air blade cavity to the outlet of the upper air blade cavity A and a sixth working position for guiding the air in the upper air blade cavity to the outlet of the upper air blade cavity B; A lower volute tongue is movably arranged in the lower air blade cavity. The structure of the lower volute tongue is adapted to the profile structure of the lower air blade cavity; the lower volute tongue has a seventh working position for guiding the air in the lower air blade cavity to the outlet of the lower air blade cavity C and an eighth working position for guiding the air in the lower air blade cavity to the outlet of the lower air blade cavity D; When the upper volute tongue is in the fifth working position and the lower volute tongue is in the seventh working position, the first main flow path can be formed between the upper air outlet and the lower air outlet; when the upper volute tongue is in the sixth working position and the lower volute tongue is in the eighth working position, the second main flow path can be formed between the upper air outlet and the lower air outlet; when the upper volute tongue is in the fifth working position and the lower volute tongue is in the eighth working position, the third main flow path can be formed between the upper air outlet and the lower air outlet.

5. The cabinet-type air conditioner indoor unit according to claim 2, characterized in that, A second upper air dam structure is movably arranged at the upper auxiliary air return opening, and the second upper air dam structure has a ninth working position for opening the upper auxiliary air return opening and a tenth working position for closing the upper auxiliary air return opening; A second lower air dam structure is movably arranged at the lower auxiliary air return opening, and the second lower air dam structure has an eleventh working position for opening the lower auxiliary air return opening and a twelfth working position for closing the lower auxiliary air return opening; When the second upper air dam structure is in the tenth working position and the second lower air dam structure is in the eleventh working position, the first main flow path can be formed between the upper air outlet and the lower air outlet; When the second upper air dam structure is in the ninth working position and the second lower air dam structure is in the twelfth working position, the second main flow path can be formed between the upper air outlet and the lower air outlet; When the second upper air dam structure is in the tenth working position and the second lower air dam structure is in the twelfth working position, the third main flow path can be formed between the upper air outlet and the lower air outlet.

6. The cabinet-type air conditioner indoor unit according to claim 2, wherein, The axial direction of the upper air vane cavity is along the horizontal direction; the upper air vane cavity inlet is formed at one axial end of the upper air vane cavity, the upper air vane cavity A outlet is formed at the top of the upper air vane cavity, and the upper air vane cavity B outlet is formed at the bottom of the lower air vane cavity; The axial direction of the lower air vane cavity is along the horizontal direction; the lower air vane cavity inlet is formed at one axial end of the lower air vane cavity, the lower air vane cavity C outlet is formed at the top of the lower air vane cavity, and the lower air vane cavity D outlet is formed at the bottom of the lower air vane cavity.

7. The cabinet-type air conditioner indoor unit according to claim 6, characterized in that, The housing includes a housing rear side wall; both the upper air vane cavity inlet and the lower air vane cavity inlet face the housing rear side wall; The cabinet-type air conditioner indoor unit further includes an indoor heat exchanger, the indoor heat exchanger includes an upper heat exchange section and a lower heat exchange section, the upper heat exchange section is arranged between the housing rear side wall and the upper air vane cavity inlet, and the lower heat exchange section is arranged between the housing rear side wall and the lower air vane cavity inlet.

8. The indoor unit of the cabinet air conditioner according to claim 1, characterized in that, The housing further includes a housing top wall and a housing front side wall, the housing top wall forms the upper air outlet, and the upper air outlet includes an upper auxiliary air outlet and an upper main air outlet which are arranged opposite to each other front and back; the housing front side wall is arranged at the front side of the bottom of the housing top wall, the housing front side wall forms the lower air outlet, and the lower air outlet includes a lower auxiliary air outlet and a lower main air outlet which are arranged opposite to each other up and down; The upper auxiliary air duct is arranged close to the front side wall of the housing and communicated with the upper auxiliary air outlet; the upper main air duct is arranged at the rear side of the upper auxiliary air duct and communicated with the upper main air outlet; the lower auxiliary air duct is arranged close to the front side wall of the housing and communicated with the lower auxiliary air outlet, and the lower main air duct is arranged at the rear side of the lower auxiliary air duct and communicated with the lower main air outlet.

9. The cabinet-type air conditioner indoor unit according to claim 8, characterized in that, From the outlet of the upper wind blade cavity A to the direction of the upper main air outlet, the flow area of the upper main air duct gradually increases; from the outlet of the lower wind blade cavity C to the direction of the upper auxiliary air outlet, the flow area of the upper auxiliary air duct gradually increases; From the outlet of the lower wind blade cavity D to the direction of the lower main air outlet, the flow area of the lower main air duct gradually increases; from the outlet of the upper wind blade cavity B to the direction of the lower auxiliary air outlet, the flow area of the lower auxiliary air duct gradually increases.

10. The cabinet-type air conditioner indoor unit according to claim 8, characterized in that, Both the upper auxiliary air return outlet and the lower auxiliary air return outlet are located between the axes of the upper wind blade cavity and the lower wind blade cavity.

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