Cabinet type air conditioner indoor unit and control method

Abstract

The invention provides a cabinet type air conditioner indoor unit and a control method. The cabinet type air conditioner indoor unit comprises a shell, an air duct assembly and an indoor heat exchanger. An upper air port and a lower air port are formed in the upper side and the lower side of the front side wall of the shell; the air duct assembly comprises an upper air duct structure and a lower air duct structure; the upper end of the upper air duct structure communicates with the upper air opening, and the lower end communicates with the shell cavity. The upper end of the lower air duct structure communicates with the shell cavity, and the lower end communicates with the lower air opening. The indoor heat exchanger is arranged between the upper air duct structure and the lower air duct structure; when the cabinet type air conditioner indoor unit is in a lower air inlet and upper air outlet mode, indoor air can enter the lower air duct structure through the lower air port, then enter the upper air duct structure through the indoor heat exchanger and is exhausted. When the cabinet type air conditioner indoor unit is in an upper-air-inlet lower-air-outlet mode, indoor air can enter the upper air duct structure through the upper air opening, then enters the lower air duct structure through the indoor heat exchanger and is exhausted. The positions of the upper air opening and the lower air opening are optimized, an air inlet in the side wall of the shell is omitted, and the attractiveness of the indoor unit is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of air conditioners, and particularly relates to a cabinet air conditioner indoor unit and a control method therefor. Background Art

[0002] In the existing cabinet air conditioner indoor unit, air inlets are formed on the side walls of the housing, and upper air outlets and lower air outlets are arranged opposite to each other up and down; by blowing air through the upper air outlets, shower cooling can be achieved, and by blowing air through the lower air outlets, carpet heating can be achieved; however, the distances between the air inlets and the upper air outlets and the lower air outlets are both close, which easily causes air flow short circuit, the air flow range is narrow, the temperature change of the indoor air is slow, and the time required for the room where the indoor unit is located to reach the set temperature is long; in addition, the air inlets are arranged between the upper air outlets and the lower air outlets, which affects the appearance of the indoor unit. Summary of the Invention

[0003] In view of this, the present invention provides a cabinet air conditioner indoor unit and a control method therefor to solve the problems such as unreasonable position setting of the air inlets in the existing cabinet air conditioners, which easily cause air flow short circuit, narrow air flow range and poor aesthetics of the indoor unit.

[0004] The present invention provides a cabinet air conditioner indoor unit, including:

[0005] A housing that 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;

[0006] An air duct assembly, which includes an upper air duct structure and a lower air duct structure; the upper air duct structure and the lower air duct structure are arranged up and down and are staggered in the horizontal direction in the housing cavity, the upper end of the upper air duct structure is communicated with the upper air outlet, and the lower end of the upper air duct structure is communicated with the housing cavity; the upper end of the lower air duct structure is communicated with the housing cavity, and the lower end of the lower air duct structure is communicated with the lower air outlet;

[0007] An indoor heat exchanger, which is arranged between the upper air duct structure and the lower air duct structure; the indoor heat exchanger can perform heat exchange with the air flowing between the upper air duct structure and the lower air duct structure;

[0008] The cabinet air conditioner indoor unit is provided with an air inlet and outlet mode, and the air inlet and outlet mode includes a lower air inlet and upper air outlet mode and an upper air inlet and lower air outlet mode;

[0009] When the cabinet air conditioner indoor unit is in the lower air inlet and upper air outlet mode, indoor air can enter the lower air duct structure through the lower air outlet, then enter the upper air duct structure through the indoor heat exchanger and be discharged through the upper air outlet; when the cabinet air conditioner indoor unit is in the upper air inlet and lower air outlet mode, indoor air can enter the upper air duct structure through the upper air outlet, then enter the lower air duct structure through the indoor heat exchanger and be discharged through the lower air outlet.

[0010] Further optionally, the housing includes a front side wall of the housing. An upper air inlet is formed on the upper side of the front side wall of the housing, and a lower air inlet is formed on the lower side of the front side wall of the housing; the upper air inlet includes an upper left air inlet and an upper right air inlet oppositely arranged in the left-right direction, and the lower air inlet includes a lower left air inlet and a lower right air inlet oppositely arranged in the left-right direction; the upper left air inlet is communicated with the upper end of the upper air duct structure, and the lower right air inlet is communicated with the lower end of the lower air duct structure;

[0011] The housing cavity includes an upper cavity and a lower cavity. The upper cavity is arranged side by side with the upper air duct structure in the left-right direction and is communicated with the upper right air inlet; the lower cavity is arranged side by side with the lower air duct structure in the left-right direction and is communicated with the lower left air inlet;

[0012] The cabinet-type air conditioner indoor unit further includes an upper baffle and a lower baffle. The upper baffle is movably arranged at the upper right air inlet and can open or close the upper right air inlet; the lower baffle is movably arranged at the lower left air inlet and can open or close the lower left air inlet.

[0013] Further optionally, the upper air duct structure includes an upper main air duct and an upper air blade cavity. The upper left air inlet, the upper main air duct and the upper air blade cavity are communicated in sequence from top to bottom; an upper air blade is rotatably arranged in the upper air blade cavity;

[0014] The lower air duct structure includes a lower main air duct and a lower air blade cavity. The lower air blade cavity, the lower main air duct and the lower right air inlet are communicated in sequence from top to bottom; a lower air blade is rotatably arranged in the lower air blade cavity.

[0015] Further optionally, the lower air inlet and upper air outlet mode includes a first lower air inlet and upper air outlet mode. When the cabinet-type air conditioner indoor unit is in the first lower air inlet and upper air outlet mode, both the lower left air inlet and the lower right air inlet are in an open state, the upper left air inlet is in an open state and the upper right air inlet is in a closed state; the indoor air near the lower left air inlet can enter the lower cavity through the lower left air inlet, and the indoor air near the lower right air inlet can enter the lower main air duct through the lower right air inlet and flow through the lower air blade cavity. The air in the lower cavity and the lower air blade cavity both enter the upper air blade cavity and are discharged through the upper main air duct and the upper left air inlet;

[0016] The above-mentioned upward air intake and downward air outlet mode includes a first upward air intake and downward air outlet mode. When the cabinet-type air conditioner indoor unit is in the first upward air intake and downward air outlet mode, the upper left air outlet and the upper right air outlet are in the open state, the lower left air outlet is in the closed state, and the lower right air outlet is in the open state; the indoor air near the upper left air outlet can enter the upper main air duct through the upper left air outlet and flow through the upper airfoil cavity, and the indoor air near the upper right air outlet can enter the upper cavity through the upper right air outlet. The air in the upper cavity and the upper airfoil cavity both enter the lower airfoil cavity and are discharged through the lower main air duct and the lower right air outlet.

[0017] Further optionally, the downward air intake and upward air outlet mode includes a second downward air intake and upward air outlet mode. When the cabinet-type air conditioner indoor unit is in the second downward air intake and upward air outlet mode, the lower left air outlet is in the closed state and the lower right air outlet is in the open state, the upper left air outlet is in the open state, and the upper right air outlet is in the closed state; the indoor air can enter the lower main air duct through the lower right air outlet and flow through the lower airfoil cavity, and then enter the upper main air duct through the upper airfoil cavity and be discharged through the upper left air outlet;

[0018] The above-mentioned upward air intake and downward air outlet mode includes a second upward air intake and downward air outlet mode. When the cabinet-type air conditioner indoor unit is in the second upward air intake and downward air outlet mode, the upper left air outlet is in the open state and the upper right air outlet is in the closed state, the lower left air outlet is in the closed state, and the lower right air outlet is in the open state; the indoor air can enter the upper main air duct through the upper left air outlet and flow through the upper airfoil cavity, and then enter the lower main air duct through the lower airfoil cavity and be discharged through the lower right air outlet.

[0019] Further optionally, the indoor heat exchanger is a plate heat exchanger. The main heat exchange surface of the plate heat exchanger is inclined relative to the horizontal plane, and the upper part of the plate heat exchanger is located in the upper cavity, and the lower part of the plate heat exchanger is located in the lower cavity.

[0020] Further optionally, an upper flaring structure is formed at one end of the upper main air duct close to the upper left air outlet; from top to bottom, the flow area of the upper flaring structure gradually decreases; and / or,

[0021] A lower flaring structure is formed at one end of the lower main air duct close to the lower right air outlet; from top to bottom, the flow area of the lower flaring structure gradually increases.

[0022] A control method for a cabinet-type air conditioner indoor unit according to the present invention, wherein the cabinet-type air conditioner indoor unit is the cabinet-type air conditioner indoor unit described in any one of the above; the control method includes:

[0023] Determine the current mode and the target air intake volume of the cabinet-type air conditioner indoor unit;

[0024] Determine the target air inlet and outlet mode according to the current mode and the target air inflow rate;

[0025] Control the indoor unit of the cabinet air conditioner to operate in the target air inlet and outlet mode;

[0026] Wherein, the current mode includes a heating mode and a cooling mode, and the target air inlet and outlet mode includes a first lower air inlet and upper air outlet mode, a second lower air inlet and upper air outlet mode, a first upper air inlet and lower air outlet mode, and a second upper air inlet and lower air outlet mode.

[0027] Further optionally, the determining the target air inlet and outlet mode according to the current mode and the target air inflow rate includes:

[0028] Compare the target air inflow rate with the preset air inflow rate;

[0029] When the target air inflow rate is greater than or equal to the preset air inflow rate and the current mode is the heating mode, determine the target air inlet and outlet mode to be the first upper air inlet and lower air outlet mode;

[0030] When the target air inflow rate is less than the preset air inflow rate and the current mode is the heating mode, determine the target air inlet and outlet mode to be the second upper air inlet and lower air outlet mode.

[0031] Further optionally, the determining the target air inlet and outlet mode according to the current mode and the target air inflow rate further includes:

[0032] When the target air inflow rate is greater than or equal to the preset air inflow rate and the current mode is the cooling mode, determine the target air inlet and outlet mode to be the first lower air inlet and upper air outlet mode;

[0033] When the target air inflow rate is less than the preset air inflow rate and the current mode is the cooling mode, determine the target air inlet and outlet mode to be the second lower air inlet and upper air outlet mode.

[0034] Compared with the prior art, the beneficial effects of the present invention are mainly as follows:

[0035] The positions of the upper air outlet and the lower air inlet are optimized, the distance between the upper air outlet and the lower air inlet is increased, and the principles of cold air sinking during cooling and hot air rising during heating are fully utilized, so that 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 temperature distribution of the indoor air is made uniform and the flow rate is stable, the time required for the room where the indoor unit is located to reach the set temperature is shortened, air flow short - circuit is avoided, and the comfort of the air is improved; the air inlet on the side wall of the housing is cancelled, improving the aesthetics of the indoor unit. Brief Description of the Drawings

[0036] 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 the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary. For those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained based on the provided drawings.

[0037] The structures, proportions, sizes, etc. shown 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 limiting conditions for the implementation of the present invention. Therefore, they do not have technical substance. 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 covered by the technical content disclosed by the present invention.

[0038] Figure 1 Schematic diagram of the external structure of an embodiment of the cabinet-type air conditioner indoor unit provided by the present invention;

[0039] Figure 2 Schematic diagram of the internal structure of an embodiment of the cabinet-type air conditioner indoor unit provided by the present invention;

[0040] Figure 3 Schematic diagram of the structure of an embodiment of the cabinet-type air conditioner indoor unit when it is in the first lower air intake and upper air outlet mode;

[0041] Figure 4 Schematic diagram of the structure of an embodiment of the cabinet-type air conditioner indoor unit when it is in the first upper air intake and lower air outlet mode;

[0042] In the figure:

[0043] 1 - housing; 11 - upper air outlet; 111 - upper left air outlet; 112 - upper right air outlet; 12 - lower air outlet; 121 - lower left air outlet; 122 - lower right air outlet; 13 - housing cavity; 131 - upper cavity; 132 - lower cavity;

[0044] 2 - upper air duct structure; 21 - upper main air duct; 211 - upper flared structure; 22 - upper air blade cavity;

[0045] 3 - lower air duct structure; 31 - lower main air duct; 311 - lower flared structure; 32 - lower air blade cavity;

[0046] 4 - indoor heat exchanger; 51 - upper baffle; 52 - lower baffle. Specific embodiments

[0047] 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.

[0048] 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.

[0049] It should be understood that the term "and / or" 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 " / " herein generally represents an "or" relationship between the front and rear associated objects.

[0050] It should also be noted that the term "comprising", "including" or any other variant thereof is intended to cover 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 also includes elements inherent to such commodity or system. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the commodity or system including the said element.

[0051] In the existing cabinet-type air conditioner indoor unit, air inlets are formed on the side walls of the housing, and an upper air outlet and a lower air outlet are arranged opposite to each other up and down; 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 distances between the air inlets 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, the temperature change of the indoor air is slow, and the time required for the room where the indoor unit is located to reach the set temperature is long; in addition, the air inlets are arranged between the upper air outlet and the lower air outlet, which affects the appearance of the indoor unit.

[0052] The present invention creatively provides a cabinet-type air conditioner indoor unit, which includes a housing, an air duct assembly, and an indoor heat exchanger; the housing encloses a housing cavity, and an upper air inlet and a lower air outlet are formed on the upper side and the lower side of the front side wall of the housing respectively; the air duct assembly includes an upper air duct structure and a lower air duct structure which are arranged up and down and are staggered in the horizontal direction in the housing cavity; the upper end of the upper air duct structure is communicated with the upper air inlet, and the lower end is communicated with the housing cavity; the upper end of the lower air duct structure is communicated with the housing cavity, and the lower end is communicated with the lower air outlet; the indoor heat exchanger is arranged between the upper air duct structure and the lower air duct structure; 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;

[0053] When the cabinet-type air conditioner indoor unit is in the lower air inlet and upper air outlet mode, indoor air can enter the lower air duct structure through the lower air outlet, then enter the upper air duct structure through the indoor heat exchanger 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, indoor air can enter the upper air duct structure through the upper air inlet, then enter the lower air duct structure through the indoor heat exchanger and be discharged through the lower air outlet;

[0054] The positions of the upper air inlet and the lower air outlet are optimized, the distance between the upper air inlet and the lower air outlet is increased, and the principles that cold air sinks during refrigeration and hot air rises during heating are fully utilized to form a large swirling eddy current in the room where the indoor unit is located, improve the temperature change speed of indoor air, make the temperature distribution of indoor air uniform and the flow rate stable, shorten the time required for the room where the indoor unit is located to reach the set temperature, avoid air flow short circuit, and improve the comfort of air; the air inlet on the side wall of the housing is cancelled to improve the aesthetics of the indoor unit.

[0055] Embodiment 1

[0056] <Cabinet-type air conditioner indoor unit>

[0057] As Figures 1 to 4 shown, this embodiment provides a cabinet-type air conditioner indoor unit, including:

[0058] A housing 1, which encloses a housing cavity 13, and the housing 1 includes a front side wall of the housing. An upper air inlet 11 is formed on the upper side of the front side wall of the housing, and a lower air outlet 12 is formed on the lower side of the front side wall of the housing; the width of the upper air inlet 11 is close to the width of the front side wall of the housing, and the width of the lower air outlet 12 is close to the width of the front side wall of the housing;

[0059] An air duct assembly, which includes an upper air duct structure 2 and a lower air duct structure 3; the upper air duct structure 2 and the lower air duct structure 3 are arranged up and down in the housing cavity 13, and the upper air duct structure 2 and the lower air duct structure 3 are staggered in the horizontal direction; preferably, the upper air duct structure 2 and the lower air duct structure 3 are staggered left and right; the upper end of the upper air duct structure 2 is communicated with the upper air inlet 11, and the lower end of the upper air duct structure 2 is communicated with the housing cavity 13; the upper end of the lower air duct structure 3 is communicated with the housing cavity 13, and the lower end of the lower air duct structure 3 is communicated with the lower air outlet 12;

[0060] An indoor heat exchanger 4 is provided between the upper air duct structure 2 and the lower air duct structure 3; the indoor heat exchanger 4 can perform heat exchange with the air flowing between the upper air duct structure 2 and the lower air duct structure 3;

[0061] The cabinet-type air conditioner indoor unit is provided with an air inlet and outlet mode, and the air inlet and outlet mode includes a lower air inlet and upper air outlet mode and an upper air inlet and lower air outlet mode;

[0062] When the cabinet-type air conditioner operates in the heating mode, the cabinet-type air conditioner indoor unit is in the lower air inlet and upper air outlet mode, and indoor air can enter the lower air duct structure 3 through the lower air inlet 12, then enter the upper air duct structure 2 through the indoor heat exchanger 4 and be discharged through the upper air outlet 11;

[0063] When the cabinet-type air conditioner operates in the cooling mode, the cabinet-type air conditioner indoor unit is in the upper air inlet and lower air outlet mode, and indoor air can enter the upper air duct structure 2 through the upper air outlet 11, then enter the lower air duct structure 3 through the indoor heat exchanger 4 and be discharged through the lower air inlet 12.

[0064] Aiming at the problem of single air inlet and outlet mode caused by the unreasonable structural design of the upper air outlet 11 and the lower air inlet 12, in this embodiment, the upper air outlet 11 includes an upper left air outlet 111 and an upper right air outlet 112 which are oppositely arranged in the left-right direction, and the lower air inlet 12 includes a lower left air inlet 121 and a lower right air inlet 122 which are oppositely arranged in the left-right direction; the upper left air outlet 111 is communicated with the upper end of the upper air duct structure 2, and the lower right air inlet 122 is communicated with the lower end of the lower air duct structure 3;

[0065] The housing cavity 13 includes an upper cavity 131 and a lower cavity 132. The upper cavity 131 is arranged side by side with the upper air duct structure 2 in the left-right direction, and the upper cavity 131 is communicated with the upper right air outlet 112; the lower cavity 132 is arranged side by side with the lower air duct structure 3 in the left-right direction, and the lower cavity 132 is communicated with the lower left air inlet 121;

[0066] The cabinet-type air conditioner indoor unit further includes an upper baffle 51 and a lower baffle 52. The upper baffle 51 is movably arranged at the upper right air outlet 112, and the upper baffle 51 can open or close the upper right air outlet 112; when the upper baffle 51 opens the upper right air outlet 112, indoor air can enter the upper cavity 131 through the upper right air outlet 112;

[0067] The lower baffle 52 is movably arranged at the lower left air inlet 121, and the lower baffle 52 can open or close the lower left air inlet 121; when the lower baffle 52 opens the lower left air inlet 121, indoor air can enter the lower cavity 132 through the lower left air inlet 121.

[0068] Furthermore, the upper air duct structure 2 includes an upper main air duct 21 and an upper air blade cavity 22. The upper left air outlet 111, the upper main air duct 21, and the upper air blade cavity 22 are connected in sequence from top to bottom. An upper air blade is rotatably arranged in the upper air blade cavity 22. When the upper air blade rotates, indoor air can flow through the upper main air duct 21 and the upper air blade cavity 22 in sequence through the upper left air outlet 111, or enter the upper air blade cavity 22 through the lower left air outlet 121 and the lower cavity 132, or enter the upper air blade cavity 22 through the lower right air outlet 122, the lower main air duct 31, and the lower air blade cavity 32.

[0069] The lower air duct structure 3 includes a lower main air duct 31 and a lower air blade cavity 32. The lower air blade cavity 32, the lower main air duct 31, and the lower right air outlet 122 are connected in sequence from top to bottom. A lower air blade is rotatably arranged in the lower air blade cavity 32. When the lower air blade rotates, indoor air can flow through the lower main air duct 31 and the lower air blade cavity 32 in sequence through the lower right air outlet 122, or enter the lower air blade cavity 32 through the upper right air outlet 112 and the upper cavity 131, or enter the lower air blade cavity 32 through the upper left air outlet 111, the upper main air duct 21, and the upper air blade cavity 22.

[0070] Specifically, the lower air intake and upper air outlet mode includes a first lower air intake and upper air outlet mode and a second lower air intake and upper air outlet mode. When the cabinet-type air conditioner indoor unit is in the first lower air intake and upper air outlet mode, both the lower left air outlet 121 and the lower right air outlet 122 are in the open state, the upper left air outlet 111 is in the open state, and the upper right air outlet 112 is in the closed state. Indoor air near the lower left air outlet 121 can enter the lower cavity 132 through the lower left air outlet 121. Indoor air near the lower right air outlet 122 can enter the lower main air duct 31 through the lower right air outlet 122 and flow through the lower air blade cavity 32. The air in the lower cavity 132 and the lower air blade cavity 32 both enter the upper air blade cavity 22 and are discharged through the upper main air duct 21 and the upper left air outlet 111, preventing cold air from directly blowing and avoiding air being directly blown out without passing through the indoor heat exchanger 4, expanding the air intake area, and solving the problem of insufficient air intake.

[0071] When the cabinet-type air conditioner indoor unit is in the second lower air intake and upper air outlet mode, the lower left air outlet 121 is in the closed state, both the lower right air outlet 122 are in the open state, the upper left air outlet 111 is in the open state, and the upper right air outlet 112 is in the closed state. Indoor air can enter the lower main air duct 31 through the lower right air outlet 122 and flow through the lower air blade cavity 32, then enter the upper main air duct 21 through the upper air blade cavity 22 and be discharged through the upper left air outlet 111.

[0072] In addition, the upward air inlet and downward air outlet mode includes a first upward air inlet and downward air outlet mode and a second upward air inlet and downward air outlet mode. When the cabinet-type air conditioner indoor unit is in the first upward air inlet and downward air outlet mode, the upper left air outlet 111 and the upper right air outlet 112 are in the open state, the lower left air outlet 121 is in the closed state and the lower right air outlet 122 is in the open state; the indoor air near the upper left air outlet 111 can enter the upper main air duct 21 through the upper left air outlet 111 and flow through the upper air blade cavity 22, and the indoor air near the upper right air outlet 112 can enter the upper cavity 131 through the upper right air outlet 112. The air in the upper cavity 131 and the upper air blade cavity 22 both enter the lower air blade cavity 32 and are discharged through the lower main air duct 31 and the lower right air outlet 122; it is avoided that the air blows out directly without passing through the indoor heat exchanger 4, the air inlet area is enlarged, and the problem of insufficient air inlet is solved.

[0073] When the cabinet-type air conditioner indoor unit is in the second upward air inlet and downward air outlet mode, the upper left air outlet 111 is in the open state and the upper right air outlet 112 is in the closed state, the lower left air outlet 121 is in the closed state and the lower right air outlet 122 is in the open state; the indoor air can enter the upper main air duct 21 through the upper left air outlet 111 and flow through the upper air blade cavity 22, and then enter the lower main air duct 31 through the lower air blade cavity 32 and be discharged through the lower right air outlet 122.

[0074] Aiming at the problem that the unreasonable structure design of the indoor heat exchanger 4 leads to a small heat exchange area, this embodiment proposes that the indoor heat exchanger 4 is a plate heat exchanger. The main heat exchange surface of the plate heat exchanger is inclined relative to the horizontal plane, and the upper part of the plate heat exchanger is located on the right side of the upper air blade cavity 22 and inside the upper cavity 131, and the lower part of the plate heat exchanger is located on the left side of the lower air blade cavity 32 and inside the lower cavity 132; the air discharged from the upper air blade cavity 22 and the air in the upper cavity 131 can enter the lower air blade cavity 32 through the indoor heat exchanger 4, and the air exchanges heat fully with the indoor heat exchanger 4; the air discharged from the lower air blade cavity 32 and the air in the lower cavity 132 can enter the upper air blade cavity 22 through the indoor heat exchanger 4, and the air exchanges heat fully with the indoor heat exchanger 4.

[0075] Aiming at the problem that the unreasonable structure design of the upper main air duct 21 and the lower main air duct 31 leads to a large air flow resistance, this embodiment proposes that an upper flaring structure 211 is formed at one end of the upper main air duct 21 close to the upper left air outlet 111; from top to bottom, the flow area of the upper flaring structure 211 gradually decreases; when the air flows through the upper left air outlet 111 and the upper flaring structure 211, the resistance is small and the air volume is sufficient.

[0076] A lower flaring structure 311 is formed at one end of the lower main air duct 31 close to the lower right air outlet 122; from top to bottom, the flow area of the lower flaring structure 311 gradually increases; when the air flows through the lower right air outlet 122 and the lower flaring structure 311, the resistance is small and the air volume is sufficient.

[0077] <Control Method>

[0078] This embodiment also provides a control method for a cabinet-type air conditioner indoor unit, where the cabinet-type air conditioner indoor unit is the cabinet-type air conditioner indoor unit described in any one of the above; the control method includes:

[0079] Determine the current mode and the target air intake volume of the cabinet-type air conditioner indoor unit;

[0080] Determine the target air inlet and outlet mode according to the current mode and the target air intake volume;

[0081] Control the cabinet-type air conditioner indoor unit to operate in the target air inlet and outlet mode;

[0082] Among them, the current mode includes a heating mode and a cooling mode, and the target air inlet and outlet mode includes a first lower air inlet and upper air outlet mode, a second lower air inlet and upper air outlet mode, a first upper air inlet and lower air outlet mode, and a second upper air inlet and lower air outlet mode.

[0083] Further, determining the target air inlet and outlet mode according to the current mode and the target air intake volume includes:

[0084] Compare the target air intake volume with the preset air intake volume;

[0085] When the target air intake volume is greater than or equal to the preset air intake volume and the current mode is the heating mode, determine the target air inlet and outlet mode as the first upper air inlet and lower air outlet mode;

[0086] When the target air intake volume is less than the preset air intake volume and the current mode is the heating mode, determine the target air inlet and outlet mode as the second upper air inlet and lower air outlet mode;

[0087] When the target air intake volume is greater than or equal to the preset air intake volume and the current mode is the cooling mode, determine the target air inlet and outlet mode as the first lower air inlet and upper air outlet mode;

[0088] When the target air intake volume is less than the preset air intake volume and the current mode is the cooling mode, determine the target air inlet and outlet mode as the second lower air inlet and upper air outlet mode.

[0089] Embodiment 2

[0090] Different from Embodiment 1, the upper air outlet 11 includes an upper left air outlet 111 and an upper right air outlet 112 oppositely arranged in the left-right direction, and the lower air outlet 12 includes a lower left air outlet 121 and a lower right air outlet 122 oppositely arranged in the left-right direction; the upper right air outlet 112 is communicated with the upper end of the upper air duct structure 2, and the lower left air outlet 121 is communicated with the lower end of the lower air duct structure 3;

[0091] The housing cavity 13 includes an upper cavity 131 and a lower cavity 132. The upper cavity 131 is arranged side by side with the upper air duct structure 2 in the left-right direction, and the upper cavity 131 is communicated with the upper left air outlet 111; the lower cavity 132 is arranged side by side with the lower air duct structure 3 in the left-right direction, and the lower cavity 132 is communicated with the lower right air outlet 122;

[0092] The cabinet-type air conditioner indoor unit further includes an upper baffle 51 and a lower baffle 52. The upper baffle 51 is movably arranged at the upper left air outlet 111, and the upper baffle 51 can open or close the upper left air outlet 111; the lower baffle 52 is movably arranged at the lower right air outlet 122, and the lower baffle 52 can open or close the lower right air outlet 122.

[0093] The exemplary embodiments of the present disclosure have been specifically illustrated 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, Comprising: A housing that encloses a housing cavity, with an upper air inlet formed at the upper part of the housing and a lower air outlet formed at the lower part of the housing; An air duct assembly that includes an upper air duct structure and a lower air duct structure; the upper air duct structure and the lower air duct structure are arranged vertically and are staggered horizontally within the housing cavity. The upper end of the upper air duct structure communicates with the upper air inlet, and the lower end of the upper air duct structure communicates with the housing cavity; the upper end of the lower air duct structure communicates with the housing cavity, and the lower end of the lower air duct structure communicates with the lower air outlet; An indoor heat exchanger disposed between the upper air duct structure and the lower air duct structure; the indoor heat exchanger can perform heat exchange with the air flowing between the upper air duct structure and the lower air duct structure; The cabinet-type air conditioner indoor unit is provided with an air inlet and outlet mode, and the air inlet and outlet mode includes 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, indoor air can enter the lower air duct structure through the lower air outlet, then enter the upper air duct structure through the indoor heat exchanger and be discharged through the upper air outlet; When the cabinet-type air conditioner indoor unit is in the upper air inlet and lower air outlet mode, indoor air can enter the upper air duct structure through the upper air outlet, then enter the lower air duct structure through the indoor heat exchanger and be discharged through the lower air outlet.

2. The cabinet-type air conditioner indoor unit according to claim 1, characterized in that, The housing includes a front housing wall, with an upper air inlet formed at the upper side of the front housing wall and a lower air outlet formed at the lower side of the front housing wall; the upper air inlet includes an upper left air inlet and an upper right air inlet arranged oppositely in the left-right direction, and the lower air outlet includes a lower left air outlet and a lower right air outlet arranged oppositely in the left-right direction; the upper left air inlet communicates with the upper end of the upper air duct structure, and the lower right air outlet communicates with the lower end of the lower air duct structure; The housing cavity includes an upper cavity and a lower cavity. The upper cavity is arranged side by side with the upper air duct structure horizontally and communicates with the upper right air inlet; the lower cavity is arranged side by side with the lower air duct structure horizontally and communicates with the lower left air outlet; The cabinet-type air conditioner indoor unit further includes an upper baffle and a lower baffle. The upper baffle is movably arranged at the upper right air inlet and can open or close the upper right air inlet; the lower baffle is movably arranged at the lower left air outlet and can open or close the lower left air outlet.

3. The cabinet-type air conditioner indoor unit according to claim 2, characterized in that, The upper air duct structure includes an upper main air duct and an upper air blade cavity. The upper left air inlet, the upper main air duct, and the upper air blade cavity are sequentially communicated from top to bottom; an upper air blade is rotatably arranged within the upper air blade cavity; The lower air duct structure includes a lower main air duct and a lower air blade cavity. The lower air blade cavity, the lower main air duct, and the lower right air outlet are sequentially communicated from top to bottom; a lower air blade is rotatably arranged within the lower air blade cavity.

4. The cabinet-type air conditioner indoor unit according to claim 3, characterized in that, The lower air inlet and upper air outlet mode includes a first lower air inlet and upper air outlet mode. When the cabinet air conditioner indoor unit is in the first lower air inlet and upper air outlet mode, both the lower left air outlet and the lower right air outlet are in the open state, the upper left air outlet is in the open state and the upper right air outlet is in the closed state; indoor air near the lower left air outlet can enter the lower cavity through the lower left air outlet, and indoor air near the lower right air outlet can enter the lower main air duct through the lower right air outlet and flow through the lower air blade cavity. The air in the lower cavity and the lower air blade cavity both enter the upper air blade cavity and are discharged through the upper main air duct and the upper left air outlet; The upper air inlet and lower air outlet mode includes a first upper air inlet and lower air outlet mode. When the cabinet air conditioner indoor unit is in the first upper air inlet and lower air outlet mode, the upper left air outlet and the upper right air outlet are in the open state, the lower left air outlet is in the closed state and the lower right air outlet is in the open state; indoor air near the upper left air outlet can enter the upper main air duct through the upper left air outlet and flow through the upper air blade cavity, and indoor air near the upper right air outlet can enter the upper cavity through the upper right air outlet. The air in the upper cavity and the upper air blade cavity both enter the lower air blade cavity and are discharged through the lower main air duct and the lower right air outlet.

5. The indoor unit of the cabinet air conditioner according to claim 3, characterized in that, The lower air inlet and upper air outlet mode includes a second lower air inlet and upper air outlet mode. When the cabinet air conditioner indoor unit is in the second lower air inlet and upper air outlet mode, the lower left air outlet is in the closed state and both the lower right air outlets are in the open state, the upper left air outlet is in the open state and the upper right air outlet is in the closed state; Indoor air can enter the lower main air duct through the lower right air outlet and flow through the lower air blade cavity, then enter the upper main air duct through the upper air blade cavity and be discharged through the upper left air outlet; The upper air inlet and lower air outlet mode includes a second upper air inlet and lower air outlet mode. When the cabinet air conditioner indoor unit is in the second upper air inlet and lower air outlet mode, the upper left air outlet is in the open state and the upper right air outlet is in the closed state, the lower left air outlet is in the closed state and the lower right air outlet is in the open state; Indoor air can enter the upper main air duct through the upper left air outlet and flow through the upper air blade cavity, then enter the lower main air duct through the lower air blade cavity and be discharged through the lower right air outlet.

6. The cabinet-type air conditioner indoor unit according to claim 3, characterized in that, The indoor heat exchanger is a plate heat exchanger. The main heat exchange surface of the plate heat exchanger is inclined relative to the horizontal plane, and the upper part of the plate heat exchanger is located in the upper cavity, and the lower part of the plate heat exchanger is located in the lower cavity.

7. The cabinet-type air conditioner indoor unit according to claim 3, characterized in that, One end of the upper main air duct near the upper left air outlet is formed with an upper flaring structure; from top to bottom, the flow area of the upper flaring structure gradually decreases; and / or, One end of the lower main air duct near the lower right air outlet is formed with a lower flaring structure; from top to bottom, the flow area of the lower flaring structure gradually increases.

8. A control method for an indoor unit of a cabinet air conditioner, characterized in that, The cabinet air conditioner indoor unit is the cabinet air conditioner indoor unit according to any one of claims 5-7; the control method includes: Determine the current mode and target air intake of the cabinet air conditioner indoor unit; Determine the target air inlet and outlet mode according to the current mode and the target air intake; Control the operation of the cabinet-type air conditioner indoor unit in the target air inlet and outlet mode; Wherein, the current mode includes a heating mode and a cooling mode, and the target air inlet and outlet modes include a first lower air inlet and upper air outlet mode, a second lower air inlet and upper air outlet mode, a first upper air inlet and lower air outlet mode, and a second upper air inlet and lower air outlet mode.

9. The control method of the cabinet-type air conditioner indoor unit according to claim 8, characterized in that, The determining the target air inlet and outlet mode according to the current mode and the target air inlet volume includes: Comparing the target air inlet volume with a preset air inlet volume; When the target air inlet volume is greater than or equal to the preset air inlet volume and the current mode is the heating mode, determining the target air inlet and outlet mode to be the first upper air inlet and lower air outlet mode; When the target air inlet volume is less than the preset air inlet volume and the current mode is the heating mode, determining the target air inlet and outlet mode to be the second upper air inlet and lower air outlet mode.

10. The control method of the cabinet air conditioner indoor unit according to claim 9, characterized in that, The determining the target air inlet and outlet mode according to the current mode and the target air inlet volume further includes: When the target air inlet volume is greater than or equal to the preset air inlet volume and the current mode is the cooling mode, determining the target air inlet and outlet mode to be the first lower air inlet and upper air outlet mode; When the target air inlet volume is less than the preset air inlet volume and the current mode is the cooling mode, determining the target air inlet and outlet mode to be the second lower air inlet and upper air outlet mode.

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