Cabinet type air conditioner indoor unit and control method of cabinet type air conditioner

Abstract

The invention provides a cabinet type air conditioner indoor unit and a control method of a cabinet type air conditioner. The cabinet type air conditioner indoor unit comprises a machine shell, an indoor heat exchanger and an air duct shell. An upper cavity and a lower cavity are formed in the machine shell, the indoor heat exchanger is arranged in the upper cavity, and the air duct shell is arranged in the lower cavity. A left air inlet flow path, a right air inlet flow path, an upper air inlet flow path and a lower air inlet flow path are formed between the machine shell and the air duct shell. An upper air outlet flow path and a lower air outlet flow path are formed between the machine shell and the air duct shell. The left air inlet flow path, the right air inlet flow path, the upper air inlet flow path and the lower air outlet flow path jointly form a first air inlet and outlet flow path, air enters at least one of the shell left air opening and the shell right air opening and the shell lower air opening, and air exits from the shell upper air opening. The left air inlet flow path, the right air inlet flow path, the lower air inlet flow path and the upper air outlet flow path jointly form a second air inlet and outlet flow path, air enters at least one of the shell left air opening and the shell right air opening and the shell upper air opening, and air exits from the shell lower air opening; the air inlet area is increased, and the air supply range is expanded.

Description

Technical Field

[0001] This invention belongs to the field of air conditioning technology, and particularly relates to a cabinet-type air conditioner indoor unit and a control method for the cabinet-type air conditioner. Background Technology

[0002] Floor-standing air conditioner indoor units typically achieve reversible airflow modes by adjusting the fan direction or the position of the deflector, such as top intake and bottom exhaust or vice versa. However, this structure, due to its small intake area, limits the airflow, resulting in insufficient air delivery distance and a narrow air delivery range, making it difficult to meet the needs of large spaces or differentiated air delivery requirements. To improve airflow, existing technologies have adopted improvements such as dual-suction centrifugal fans, but the increase in airflow is limited and often accompanied by a significant increase in noise, affecting the user experience. Summary of the Invention

[0003] In view of this, the present invention provides a cabinet air conditioner indoor unit and a cabinet air conditioner control method to solve the problems in existing cabinet air conditioner indoor units, such as limited air intake area, small air intake volume, resulting in insufficient air supply distance and narrow air supply range, making it difficult to meet diverse air supply needs.

[0004] This invention provides a cabinet-type air conditioner indoor unit, including a casing, an indoor heat exchanger, and an air duct casing; the upper end of the casing wall forms an upper air vent, the lower front end of the casing wall forms a lower air vent, the left rear side forms a left air vent, and the right rear side forms a right air vent; the upper air vent, lower air vent, left air vent, and right air vent are all connected to the indoor unit; the opening and closing state and the opening degree of the left and right air vents can be independently controlled; The casing has an upper cavity and a lower cavity arranged opposite each other; the indoor heat exchanger is located in the upper cavity, and the air duct shell is located in the lower cavity. The housing and the air duct housing together form a first air inlet and outlet path and a second air inlet and outlet path. The first air inlet and outlet path is for air to enter through at least one of the left air vent and the right air vent of the housing and the upper air vent of the housing, and to exit through the lower air vent of the housing. The second air inlet and outlet path is for air to enter through at least one of the left air vent and the right air vent of the housing and the lower air vent of the housing, and to exit through the upper air vent of the housing.

[0005] Further optionally, the upper end of the shell wall of the air duct housing is formed with an upper air duct housing inlet and the lower end of the shell wall is formed with a lower air duct housing inlet; the interior of the air duct housing is formed with an upper air duct, a fan blade cavity and a lower air duct arranged sequentially from top to bottom; the shell wall of the air duct housing is formed with an upper return air duct at a position corresponding to the upper air duct and a fan blade cavity inlet at a position corresponding to the fan blade cavity; the fan blade cavity inlet includes a left fan blade cavity inlet corresponding to the left air duct of the housing and a right fan blade cavity inlet corresponding to the right air duct of the housing; An air inlet cavity is formed between the housing and the duct housing; the air inlet cavity connects the left air inlet of the housing and the left air inlet of the fan blade cavity to form a left air inlet flow path, and the air inlet cavity connects the right air inlet of the housing and the right air inlet of the fan blade cavity to form a right air inlet flow path; the air inlet cavity connects the upper return air inlet, the left air inlet of the fan blade cavity and the right air inlet of the fan blade cavity to form a first upper air inlet flow path, and the upper air inlet of the housing, the upper cavity, the upper air inlet of the duct housing, the upper air duct and the upper return air inlet are sequentially connected to form a second upper air inlet flow path; the fan blade cavity, the lower air duct, the lower air inlet of the duct housing and the lower air inlet of the housing are sequentially connected to form a lower air outlet flow path; The left air intake path, right air intake path, first upper air intake path, second upper air intake path, and lower air outlet path together form the first air intake and exhaust path.

[0006] Further optionally, the shell wall of the air duct shell has a lower return air inlet formed at the location corresponding to the lower air duct; The air inlet cavity is connected to the lower return air inlet, the left air inlet of the fan blade cavity, and the right air inlet of the fan blade cavity to form a first lower air inlet flow path. The lower air inlet of the casing, the lower air inlet of the duct casing, the lower air duct, and the lower return air inlet are sequentially connected to form a second lower air inlet flow path. The fan blade cavity, the upper air duct, the upper air inlet of the duct casing, the upper cavity, and the upper air inlet of the casing are sequentially connected to form an upper air outlet flow path. The left air intake path, right air intake path, first lower air intake path, second lower air intake path, and upper air outlet path together form the second air intake and exhaust path.

[0007] Further optionally, both the upper return air inlet and the lower return air inlet can be controlled to open or close, and the connection between the upper air duct and the fan blade cavity and the connection between the lower air duct and the fan blade cavity can be controlled to be disconnected. When the upper return air vent is closed, the upper air duct and the fan blade cavity are connected, the lower return air vent is open, and the lower air duct and the fan blade cavity are disconnected, the cabinet air conditioner indoor unit forms the first lower air inlet flow path, the second lower air inlet flow path, and the upper air outlet flow path. When the upper return air vent is open, the upper air duct and the fan blade cavity are disconnected, the lower return air vent is closed, and the lower air duct and the fan blade cavity are connected, the indoor unit of the cabinet air conditioner forms the first upper air intake path, the second upper air intake path, and the lower air outlet path.

[0008] Optionally, a left air deflector structure is provided at the left air vent of the housing. The left air deflector structure can be controlled to move to open and close the left air vent of the housing and / or adjust the opening size of the left air vent of the housing. When the left air vent of the housing is in the open state, the indoor unit of the cabinet air conditioner forms the left air intake path. The right air vent of the housing is provided with a right air deflector structure, which can be controlled to move to open and close the right air vent of the housing and / or adjust the opening size of the right air vent of the housing; when the right air vent of the housing is in the open state, the indoor unit of the cabinet air conditioner forms the right air intake path.

[0009] Further optionally, the left and right windshield structures are configured to: coordinately adjust the opening and closing status and opening degree of the left and right air vents of the casing according to the operating mode of the indoor unit of the cabinet air conditioner and the indoor air temperature; The operating modes include cooling mode and heating mode.

[0010] Further optionally, the indoor unit of the cabinet air conditioner also includes a fan, the fan including a fan blade and a motor, the fan blade being rotatably disposed in the fan blade cavity for providing power to the air; the motor being disposed outside the air duct shell and located at one axial end of the fan blade cavity, the output shaft of the motor being drivenly connected to the fan blade for driving the fan blade to rotate; The left and right windshield structures are configured to adjust the opening and closing states and opening size of the left and right air inlets of the casing in coordination, based on the air intake volume of the left and right air inlets of the fan blade cavity, and / or the overall appearance of the casing, and / or the distribution of obstructions on the exterior of the casing and near the left and right air inlets of the casing.

[0011] The present invention also provides a control method for a cabinet air conditioner, wherein the cabinet air conditioner includes the indoor unit of the cabinet air conditioner described in any of the above claims; the control method includes: Obtain the current indoor air temperature; Determine the current operating mode of the indoor unit of the cabinet air conditioner; Based on the current operating mode and the current air temperature, at least the opening and closing status and opening degree of the left and right air vents of the casing should be adjusted in a coordinated manner. The operating modes include cooling mode and heating mode.

[0012] Further optionally, the step of coordinating the opening and closing states and opening degrees of the left and right air vents of the casing based on the current operating mode and the current air temperature includes: Calculate the temperature difference between the current air temperature and the preset temperature; Determine whether the temperature difference is within the preset temperature range; Based on the current operating mode and the judgment result of whether the temperature difference is within the preset temperature range, at least the opening and closing status and target opening size of the left and right air vents of the casing are controlled.

[0013] Further optionally, the cooling mode includes a conventional cooling mode; when the current operating mode is the conventional cooling mode, the step of controlling at least the opening and closing status and target opening size of the left and right air vents of the casing based on the current operating mode and the determination result of whether the temperature difference is within the preset temperature range includes: When the temperature difference is greater than the maximum threshold of the preset temperature range, the left and right air vents of the housing are both controlled to be open and the target opening size is the first opening size. When the temperature difference is within the preset temperature range, the left and right air vents of the housing are both controlled to be open and the target opening size is the second opening size. When the temperature difference is less than the minimum threshold of the preset temperature range, both the left and right air vents of the housing are controlled to be closed. Wherein, the first opening degree is greater than the second opening degree.

[0014] Further optionally, the cooling mode includes a silent cooling mode, and the lower air vent of the casing can be controlled to open or close; when the current operating mode is the silent cooling mode, the step of controlling the opening and closing status and target opening size of at least the left and right air vents of the casing based on the current operating mode and the judgment result of whether the temperature difference is within the preset temperature range includes: The lower air vent of the casing is kept closed. When the temperature difference is greater than the maximum threshold of the preset temperature range, the left air vent and the right air vent of the housing are both controlled to be in the open state and the target opening size is the first opening size. When the temperature difference is less than or equal to the maximum threshold of the preset temperature range, the left and right air vents of the housing are both controlled to be open and the target opening size is the second opening size. Wherein, the first opening degree is greater than the second opening degree.

[0015] Further optionally, when the current operating mode is the heating mode, the step of controlling at least the opening and closing states and target opening sizes of the left and right air vents of the casing based on the current operating mode and the determination result of whether the temperature difference is within the preset temperature range includes: When the temperature difference is within the preset temperature range, the left and right air vents of the housing are both controlled to be open and the target opening size is the first opening size. When the temperature difference is greater than the maximum threshold of the preset temperature range, the left and right air vents of the housing are both controlled to be open and the target opening size is the second opening size. When the temperature difference is less than the minimum threshold of the preset temperature range, both the left and right air vents of the housing are controlled to be closed. Wherein, the first opening degree is greater than the second opening degree.

[0016] Further optionally, the upper air vent of the casing can be controlled to open and close, and the opening degree of the upper air vent of the casing can be adjusted; when the current operating mode is the heating mode, the step of coordinating the opening and closing state and opening degree of at least the left and right air vents of the casing according to the current operating mode and the current air temperature further includes: The opening and closing status and opening degree of the upper air vent, left air vent, and right air vent of the housing are adjusted in a coordinated manner.

[0017] Compared with the prior art, the main advantages of the present invention are as follows: (1) Effectively increase the air intake area and improve heat exchange and air supply efficiency: The left air intake path, right air intake path, first upper air intake path, second upper air intake path and lower air outlet path together form the first air intake and exhaust path, and the left air intake path, right air intake path, first lower air intake path, second lower air intake path and upper air outlet path together form the second air intake and exhaust path; the effective air intake area is significantly increased, so that indoor air can enter the casing more smoothly and in larger quantities to exchange heat with the heat exchanger, thereby directly improving the cooling or heating efficiency, and enhancing the air supply capacity and distance; (2) Balanced air intake of the fan, optimized aerodynamic performance and stability: The unique left and right air intake flow paths can guide air into the fan blade cavity from both sides of the axial direction, which can balance the air intake on both sides of the axial direction of the double-suction centrifugal fan; reduce airflow losses such as eddies and surge caused by the motor at one end of the axial direction of the fan blade cavity, and significantly improve the overall aerodynamic efficiency and operational stability of the air supply system. (3) Significantly reduce operating noise: The increased air intake area reduces the air intake velocity and flow resistance, thus reducing aerodynamic noise; at the same time, air intake from both sides of the fan blade cavity avoids the periodic pulsation and abnormal noise caused by the fan being unbalanced on one side; the synergistic effect of the two enables the whole machine to achieve a lower operating noise level while obtaining a large air volume. (4) Achieve flexible and reversible mixed air supply mode: By constructing two complete air flow paths, the first inlet and outlet air flow path and the second inlet and outlet air flow path, users can flexibly switch according to their needs (such as the first inlet and outlet air flow path supplying air when heating and the second inlet and outlet air flow path supplying air when cooling); not only does it meet diverse comfort air supply needs, but it can also make full use of the advantages of large air volume and low noise in both modes, improving the practicality of the product and user experience. Attached Figure Description

[0018] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0019] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0020] Figure 1a and Figure 1b This is a schematic diagram of the assembly structure of an embodiment of a cabinet-type air conditioner indoor unit provided by the present invention; Figure 1c for Figure 1b Enlarged view of point A in the middle; Figure 2 This is an exploded structural diagram of an embodiment of the cabinet-type air conditioner indoor unit provided by the present invention; Figure 3 A schematic diagram of the structure of an embodiment of the cabinet-type air conditioner indoor unit provided by the present invention when the air vent at the bottom of the casing is closed; Figure 4 A schematic diagram of the structure of an embodiment of the cabinet air conditioner indoor unit in heating mode provided by the present invention; Figure 5 A schematic diagram of the structure of an embodiment of the cabinet air conditioner indoor unit in cooling mode provided by the present invention; Figure 6a The simulation cloud map provided by the present invention shows the indoor unit of the cabinet air conditioner in heating mode (both the left and right air vents of the casing are closed). Figure 6b The simulation cloud map provided by the present invention shows the indoor unit of the cabinet air conditioner in cooling mode (both the left and right air vents of the unit are open). Figure 7 This is a schematic flowchart of an embodiment of the control method for a cabinet air conditioner provided by the present invention; In the picture: 1-Casing; 11-Front wall of casing; 111-Lower air vent of casing; 12-Rear wall of casing; 121-Left air vent of casing; 122-Right air vent of casing; 13-Left wall of casing; 14-Right wall of casing; 15-Upper air vent of casing; 161-Upper cavity; 162-Lower cavity; 17-Base; 21-Air duct shell; 22-Fan blade cavity; 221-Left air inlet of fan blade cavity; 222-Right air inlet of fan blade cavity; 223-Upper air inlet of fan blade cavity; 224-Lower air inlet of fan blade cavity; 23-Upper air duct; 231-Upper return air inlet; 232-Upper air inlet of air duct shell; 24-Lower air duct; 241-Lower return air inlet; 242-Lower air inlet of air duct shell; 25-Fan blade; 3-Air inlet cavity; 31-Left air inlet path; 32-Right air inlet path; 33-First upper air inlet path; 34-First lower air inlet path; 41-Left windshield structure; 42-Right windshield structure; 43-Upper windshield structure; 44-Lower windshield structure; 45-Lower air guide plate; 51-Volume tongue; 52-Indoor heat exchanger. Detailed Implementation

[0021] The following specific embodiments illustrate the implementation 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 only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms “a,” “the,” and “the” used in the embodiments of this invention and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. “Multiple” generally includes at least two, but does not exclude the inclusion of at least one.

[0023] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0024] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes said element.

[0025] In cabinet-type air conditioner indoor units with reversible air supply, the air intake area is small, which limits the air intake volume, resulting in insufficient air supply distance and narrow air supply range, making it difficult to meet the needs of large spaces or differentiated air supply. While the air intake volume can be improved by using a dual-suction centrifugal fan, the improvement in air intake volume is limited and is often accompanied by a significant increase in noise, affecting the user experience. This invention creatively provides a cabinet-type air conditioner indoor unit, including a casing, an indoor heat exchanger, and an air duct casing; the upper end of the casing wall forms an upper air vent, the lower front end of the casing wall forms a lower air vent, the left rear side forms a left air vent, and the right rear side forms a right air vent; the upper air vent, lower air vent, left air vent, and right air vent are all connected to the indoor unit; the opening and closing status and opening degree of the left air vent and the right air vent can be independently controlled; The casing has an upper cavity and a lower cavity arranged opposite each other. The indoor heat exchanger is located in the upper cavity, and the air duct shell is located in the lower cavity. The casing and the air duct shell together form a first air inlet and outlet path and a second air inlet and outlet path. The first air inlet and outlet path is for air to enter through at least one of the left air outlet and the right air outlet of the casing and the upper air outlet of the casing, and to exit through the lower air outlet of the casing. The second air inlet and outlet path is for air to enter through at least one of the left air outlet and the right air outlet of the casing and the lower air outlet of the casing, and to exit through the upper air outlet of the casing. When the indoor unit of a cabinet air conditioner forms the first air inlet and outlet airflow path, it can operate in heating mode; when the indoor unit forms the second air inlet and outlet airflow path, it can operate in cooling mode; increasing the air inlet area improves heat exchange efficiency; increasing the air delivery distance expands the air delivery range.

[0026] Example 1 <Indoor unit of cabinet air conditioner> like Figures 1a to 5 As shown, this embodiment provides a cabinet-type air conditioner indoor unit, including: The casing 1 has an upper air vent 15 formed at the upper end of its casing wall, a lower air vent 111 formed at the lower front end of the casing wall, a left air vent 121 formed at the left rear end of the casing wall, and a right air vent 122 formed at the right rear end of the casing wall. The upper air vent 15, lower air vent 111, left air vent 121, and right air vent 122 are all connected to the interior. The opening and closing status and opening degree of the left air vent 121 and right air vent 122 can be independently controlled. The interior of the casing 1 has an upper cavity 161 and a lower cavity 162 arranged vertically opposite to each other. The indoor heat exchanger 52 is disposed inside the upper cavity 161; The air duct shell 21 is disposed within the lower cavity 162. An upper air duct shell inlet 232 is formed at the upper end of the shell wall of the air duct shell 21, and a lower air duct shell inlet 242 is formed at the lower end of the shell wall of the air duct shell 21. Inside the air duct shell 21, an upper air duct 23, a fan blade cavity 22, and a lower air duct 24 are formed sequentially from top to bottom. An upper return air inlet 231 is formed on the shell wall of the air duct shell 21 at a position corresponding to the upper air duct 23, and a lower return air inlet 241 is formed on the shell wall of the air duct shell 21 at a position corresponding to the lower air duct 24. A fan blade cavity inlet is formed on the shell wall of the air duct shell 21 at a position corresponding to the fan blade cavity 22, and the fan blade cavity inlet and the fan blade cavity 22 are connected. The fan blade cavity inlet includes a left fan blade cavity inlet 221 corresponding to the left air duct 121 of the housing and a right fan blade cavity inlet 222 corresponding to the right air duct 122 of the housing. A fan includes a fan blade 25 and a motor. The fan blade 25 is rotatably disposed within a fan blade cavity 22 for providing power to the air. The motor is disposed outside the air duct housing 21 and located at one axial end of the fan blade cavity 22. The output shaft of the motor is drivenly connected to the fan blade 25 for driving the fan blade 25 to rotate. Preferably, the fan blade 25 is a double-suction centrifugal fan blade 25. The axial direction of the fan blade cavity 22 and the axial direction of the fan blade 25 are horizontal. The air duct housing 21 forms a left air inlet 221 on the left axial direction of the fan blade cavity 22 and a right air inlet 222 on the right axial direction of the fan blade cavity 22. An air inlet cavity 3 is formed between the housing 1 and the air duct housing 21; the air inlet cavity 3 connects the left air outlet 121 of the housing and the left air inlet 221 of the fan blade cavity to form a left air inlet flow path 31; the air inlet cavity 3 connects the right air outlet 122 of the housing and the right air inlet 222 of the fan blade cavity to form a right air inlet flow path 32; the air inlet cavity 3 connects the upper return air outlet 231, the left air inlet 221 of the fan blade cavity and the right air inlet 222 of the fan blade cavity to form a first upper air inlet flow path 33; the air inlet cavity 3 connects the lower return air outlet 241, the left air inlet 222 of the fan blade cavity and the right air inlet 222 of the fan blade cavity to form a first lower air inlet flow path 34. The upper air inlet 15 of the casing, the upper cavity 161, the upper air inlet 232 of the air duct shell, the upper air duct 23 and the upper return air inlet 231 are connected in sequence to form a second upper air intake path, and the lower air inlet 111 of the casing, the lower air inlet 242 of the air duct shell, the lower air duct 24 and the lower return air inlet 241 are connected in sequence to form a second lower air intake path. The fan blade cavity 22, the upper air duct 23, the upper air outlet 232 of the air duct shell, the upper cavity 161 and the upper air outlet 15 of the casing are connected in sequence to form an upper air outlet path, and the fan blade cavity 22, the lower air duct 24, the lower air outlet 242 of the air duct shell and the lower air outlet 111 of the casing are connected in sequence to form a lower air outlet path. Left intake airflow path 31, right intake airflow path 32, first upper intake airflow path 33, second upper intake airflow path and lower exhaust airflow path together form the first intake and exhaust airflow path, and left intake airflow path 31, right intake airflow path 32, first lower intake airflow path 34, second lower intake airflow path and upper exhaust airflow path together form the second intake and exhaust airflow path; The cabinet air conditioner has both cooling and heating modes; When the cabinet air conditioner needs to operate in cooling mode, the indoor unit forms a second air inlet and outlet path. The fan blades 25 rotate, and the first portion of indoor air flows sequentially through the lower air inlet 111 of the casing and the lower air inlet 242 of the duct casing, entering the lower air duct 24. The air in the lower air duct 24 enters the air inlet cavity 3 through the lower return air inlet 241, and then enters the fan blade cavity 22 through the left air inlet 221 and the right air inlet 222 of the fan blade cavity. The second portion of indoor air enters the air inlet cavity 3 through the left air inlet 121 of the casing, and then enters the fan blade cavity 22 through the left air inlet 221 of the fan blade cavity. The third portion of indoor air enters the air inlet cavity 3 through the right air inlet 122 of the casing, and then enters the fan blade cavity 22 through the right air inlet 222 of the fan blade cavity. The first portion of air, the second portion... The first and third parts of the air mix in the fan blade cavity 22. The mixed air enters the upper air duct 23, and then enters the upper cavity 161 through the upper air outlet 232 of the air duct shell. The air in the upper cavity 161 flows from bottom to top through the indoor heat exchanger 52 and exchanges heat with the indoor heat exchanger 52. After heat exchange, the air is discharged into the room through the upper air outlet 15 of the casing, forming a shower-style air supply, avoiding the problem of cold air blowing directly on people. The effective air intake area is significantly increased, allowing indoor air to enter the casing 1 more smoothly and in larger quantities to exchange heat with the heat exchanger, thereby directly improving the cooling efficiency and enhancing the air supply capacity and distance. By introducing air into the fan blade cavity 22 on both sides of the axial direction, the air volume entering the fan blade cavity 22 on both sides of the axial direction is balanced, reducing aerodynamic noise. When the cabinet air conditioner needs to operate in heating mode, the indoor unit forms the first air inlet and outlet airflow path. The fan blades 25 rotate, and the first portion of indoor air flows sequentially through the upper air inlet 15 of the casing into the upper cavity 161. The air in the upper cavity 161 flows downwards through the indoor heat exchanger 52 and exchanges heat with it. After heat exchange, the air enters the upper air duct 23 through the upper air inlet 232 of the duct casing, then enters the air inlet cavity 3 through the upper return air inlet 231, and then enters the fan blade cavity 22 through the left air inlet 221 and the right air inlet 222 of the fan blade cavity. The second portion of indoor air enters the air inlet cavity 3 through the left air inlet 121 of the casing, and then enters the fan blade cavity 22 through the left air inlet 221 of the fan blade cavity. The third portion of indoor air... Part of the air enters the air inlet cavity 3 through the right air inlet 122 of the casing, and then enters the fan blade cavity 22 through the right air inlet 222 of the fan blade cavity. The first part of the air, the second part of the air, and the third part of the air mix in the fan blade cavity 22. The mixed air enters the lower air duct 24, and then flows through the lower air inlet 242 of the air duct casing and the lower air inlet 111 of the casing in sequence and is discharged into the room, forming a carpet-like air supply. This significantly increases the effective air intake area, allowing indoor air to enter the casing 1 more smoothly and in larger quantities to exchange heat with the heat exchanger, thereby directly improving the heating efficiency and enhancing the air supply capacity and distance. By intake air on both sides of the fan blade cavity 22 along the axis, the air volume intake on both sides of the fan blade cavity 22 is balanced, reducing aerodynamic noise. When the cabinet air conditioner is in heating mode, the second and third parts of indoor air do not pass through the indoor heat exchanger 52 and directly enter the fan blade cavity 22; that is, the second and third parts of indoor air mix with the first part of air after heat exchange, which lowers the temperature of the first part of air. The mixed air enters the room without feeling hot and dry, and the large air volume strengthens the agitation of indoor air, improves the uniformity of air temperature, and improves the comfort of indoor air.

[0027] The motor is located at one axial end of the fan blade cavity 22, which obstructs the air inlet of the fan blade cavity at that end, resulting in uneven air intake at the left air inlet 221 and the right air inlet 222 of the fan blade cavity, causing chaotic air distribution within the fan blade cavity 22. At this time, the air intake volume at the left air inlet 121 and the right air inlet 122 of the casing can be adjusted to balance the air intake volume at the left air inlet 221 and the right air inlet 222 of the fan blade cavity, optimize the airflow field in the flow path, and reduce aerodynamic noise.

[0028] Specifically, in the vertical direction, the air inlet 3, the left air inlet 221 of the fan blade cavity, and the right air inlet 222 of the fan blade cavity are located between the upper return air inlet 231 and the lower return air inlet 241; the air inlet 3 and the upper return air inlet 231, the left air inlet 121 of the casing, the right air inlet 122 of the casing, the left air inlet 221 of the fan blade cavity, the right air inlet 222 of the fan blade cavity, and the lower return air inlet 241 can all be connected; by controlling the opening and closing of the upper return air inlet 231, the left air inlet 121 of the casing, the right air inlet 122 of the casing, and the lower return air inlet 241, the left air inlet flow path 31, the right air inlet flow path 32, the first upper air inlet flow path 33, and the first lower air inlet flow path 34 can be formed; by controlling the opening and closing of the upper return air inlet 231 and the lower return air inlet 241, the second upper air inlet flow path, the second lower air inlet flow path, the upper air outlet flow path, and the lower air outlet flow path can also be formed.

[0029] The following further explains how the left air intake path 31 and the right air intake path 32 are formed. A left windbreak structure 41 is provided at the left air vent 121 of the casing. The left windbreak structure 41 can be controlled to move to open and close the left air vent 121 of the casing and / or adjust the opening size of the left air vent 121 of the casing. When the left air vent 121 of the casing is in the open state, the cabinet air conditioner indoor unit forms the left air intake path 31. A right air vent 122 is provided at the right air vent of the casing. The right air vent 42 can be controlled to move to open and close the right air vent 122 of the casing and / or adjust the opening size of the right air vent 122 of the casing. When the right air vent 122 of the casing is open, the indoor unit of the cabinet air conditioner forms a right air intake path 32.

[0030] Furthermore, the left and right wind deflector structures 41 and 42 are configured to: coordinately adjust the opening and closing status and degree of the left and right air vents 121 and 122 of the unit casing according to the operating mode of the indoor unit of the cabinet air conditioner and the indoor air temperature; wherein, the operating mode includes cooling mode and heating mode, and the larger the opening degree of the left and right air vents 121 and 122 of the unit casing, the greater the air intake volume; increase the air intake area, improve the air delivery distance and expand the air delivery range, improve the cooling and heating effect, and ensure air comfort; solve the problems of small air delivery volume, narrow air delivery range and poor cooling and heating effect in existing cabinet air conditioners with reversible air supply; Specifically, the cooling modes include a normal cooling mode and a silent cooling mode; First, when the indoor unit of the cabinet air conditioner is in normal cooling mode; When the temperature difference between the indoor air temperature and the preset temperature is greater than the maximum threshold of the preset temperature range, both the left air vent 121 and the right air vent 122 of the casing are in the open state and the opening degree is the first opening degree. When the temperature difference between the indoor air temperature and the preset temperature is within the preset temperature range, both the left air vent 121 and the right air vent 122 of the casing are open and the opening degree is the second opening degree; wherein, the second opening degree is smaller than the first opening degree. When the temperature difference between the indoor air temperature and the preset temperature is less than the minimum threshold of the preset temperature range, both the left air vent 121 and the right air vent 122 of the casing are closed. Second, when the indoor unit of the cabinet air conditioner is in silent cooling mode, the air vent 111 at the bottom of the unit casing is closed. When the temperature difference is greater than the maximum threshold of the preset temperature range, both the left air vent 121 and the right air vent 122 of the casing are in the open state and the opening degree is the first opening degree. When the temperature difference is less than or equal to the maximum threshold of the preset temperature range, both the left air vent 121 and the right air vent 122 of the casing are in the open state and the opening degree is the second opening degree; wherein, the second opening degree is less than the first opening degree; Third, when the indoor unit of the cabinet air conditioner is in the normal heating mode; When the temperature difference between the indoor air temperature and the preset temperature is within the preset temperature range, both the left air vent 121 and the right air vent 122 of the casing are in the open state and the opening degree is the first opening degree. When the temperature difference between the indoor air temperature and the preset temperature is greater than the maximum threshold of the preset temperature range, both the left air vent 121 and the right air vent 122 of the casing are in the open state and the opening degree is the second opening degree. When the temperature difference between the indoor air temperature and the preset temperature is less than the minimum threshold of the preset temperature range, both the left air vent 121 and the right air vent 122 of the casing are closed. In addition, in heating mode, the opening sizes of the upper air vent 15, the left air vent 121, and the right air vent 122 of the casing can be adjusted in coordination according to the pipe temperature of the indoor heat exchanger 52 and the temperature of the indoor air. This allows the air that has exchanged heat with the indoor heat exchanger 52 and the air that enters through the left air vent 121 and the right air vent 122 of the casing to be fully mixed in the fan blade cavity 22, thereby increasing the air intake volume without affecting air comfort.

[0031] The following further explains how the upper air intake path, lower air intake path, upper air outlet path, and lower air outlet path are formed. The upper return air inlet 231 and the lower return air inlet 241 can be controlled to open or close. The connection or disconnection between the upper air duct 23 and the fan blade cavity 22, and between the lower air duct 24 and the fan blade cavity 22, can be controlled to be controlled to be connected or disconnected. When the upper return air vent 231 is closed, the upper air duct 23 and the fan blade cavity 22 are connected, the lower return air vent 241 is open, and the lower air duct 24 and the fan blade cavity 22 are disconnected, the upper air duct 23 and the fan blade cavity 22 are connected, the upper air duct 23 and the air inlet cavity 3 are not connected, the lower air duct 24 and the fan blade cavity 22 are not connected, and the lower air duct 24 and the air inlet cavity 3 are connected through the lower return air vent 241. The indoor unit of the cabinet air conditioner forms a first lower air inlet flow path 34, a second lower air inlet flow path, and an upper air outlet flow path. When the upper return air vent 231 is open, the upper air duct 23 and the fan blade cavity 22 are disconnected, the lower return air vent 241 is closed, and the lower air duct 24 and the fan blade cavity 22 are connected, the upper air duct 23 and the fan blade cavity 22 are not connected, the upper air duct 23 and the air inlet cavity 3 are connected through the upper return air vent 231, the lower air duct 24 and the fan blade cavity 22 are connected, and the lower air duct 24 and the air inlet cavity 3 are not connected. The indoor unit of the cabinet air conditioner forms a first upper air inlet flow path 33, a second upper air inlet flow path, and a lower air outlet flow path.

[0032] Furthermore, an upper windbreak structure 43 is movably provided at the upper return air inlet 231. The upper windbreak structure 43 has a first upper working position and a second upper working position. When the upper windbreak structure 43 is in the first upper working position, it opens the upper return air inlet 231 and simultaneously disconnects the upper air duct 23 and the fan blade cavity 22. When the upper windbreak structure 43 is in the second upper working position, it closes the upper return air inlet 231 and simultaneously connects the upper air duct 23 and the fan blade cavity 22. Specifically, the upper windbreak structure 43 is an upper baffle, which is rotatably provided at the upper return air inlet 231. When the upper baffle rotates downward, it can close the upper return air inlet 231 and connect the upper air duct 23 and the fan blade cavity 22. When the upper baffle rotates upward, it can open the upper return air inlet 231 and disconnect the upper air duct 23 and the fan blade cavity 22. A lower windbreak structure 44 is movably provided at the lower return air inlet 241. The lower windbreak structure 44 has a first lower working position and a second lower working position. When the lower windbreak structure 44 is in the first lower working position, it opens the lower return air inlet 241 and simultaneously disconnects the lower air duct 24 and the fan blade cavity 22. When the lower windbreak structure 44 is in the second lower working position, it closes the lower return air inlet 241 and simultaneously connects the lower air duct 24 and the fan blade cavity 22. Specifically, the lower windbreak structure 44 is a lower baffle, which is rotatably provided at the lower return air inlet 241. When the lower baffle rotates downward, it can close the lower return air inlet 241 and connect the lower air duct 24 and the fan blade cavity 22. When the lower baffle rotates upward, it can open the lower return air inlet 241 and disconnect the lower air duct 24 and the fan blade cavity 22.

[0033] Preferably, an upper air vent 232 is formed at the top of the shell wall of the air duct shell 21, and a lower air vent 242 is formed at the bottom front side of the shell wall of the air duct shell 21; upper return air vents 231 are formed on the left and right sides of the shell wall of the air duct shell 21 at positions corresponding to the upper air duct 23, and each upper return air vent 231 is provided with a rotatable upper windbreak structure 43. Both upper windbreak structures 43 can be independently controlled to rotate. Controlling the rotation of the upper windbreak structure 43 can open or close the corresponding upper return air vent 231. The left and right sides of the shell wall of the air duct shell 21 are each formed with a lower return air inlet 241 at the position corresponding to the lower air duct 24. Each lower return air inlet 241 is provided with a rotatable lower wind baffle structure 44. Both lower wind baffle structures 44 can be independently controlled to rotate. Controlling the rotation of the lower wind baffle structure 44 can open or close the corresponding lower return air inlet 241. The axial direction of the fan blade cavity 22, the left and right directions of the housing 1, and the left and right directions of the air duct housing 21 are parallel.

[0034] The following describes the structure required for connecting and disconnecting the fan blade cavity 22, the upper air duct 23, and the lower air duct 24. Inside the air duct shell 21, an upper air vent 223 of the fan blade cavity is formed between the upper air duct 23 and the fan blade cavity 22, and a lower air vent 224 of the fan blade cavity is formed between the lower air duct 24 and the fan blade cavity 22. The fan blade cavity 22 is provided with a rotatable volute tongue 51, and the volute tongue 51 has a first volute tongue working position and a second volute tongue working position. When the volute tongue 51 is in the first volute tongue working position, the volute tongue 51 opens the upper air outlet 223 of the fan blade cavity and closes the lower air outlet 224 of the fan blade cavity at the same time. The upper air duct 23 and the fan blade cavity 22 are connected through the upper air outlet 223 of the fan blade cavity, while the lower air duct 24 and the fan blade cavity 22 are disconnected. That is, the upper air duct 23 and the fan blade cavity 22 are connected, while the lower air duct 24 and the fan blade cavity 22 are not connected. All the air in the fan blade cavity 22 can be discharged into the room through the upper air duct 23, the upper air outlet 232 of the air duct shell, the upper cavity 161 and the upper air outlet 15 of the casing, thereby increasing the air volume delivered by the cabinet air conditioner during cooling. When the volute tongue 51 is in the second volute tongue working position, the volute tongue 51 opens the lower air outlet 224 of the fan blade cavity and closes the upper air outlet 223 of the fan blade cavity at the same time. The lower air duct 24 and the fan blade cavity 22 are connected through the lower air outlet 224 of the fan blade cavity, while the upper air duct 23 and the fan blade cavity 22 are disconnected. That is, the upper air duct 23 and the fan blade cavity 22 are not connected, while the lower air duct 24 and the fan blade cavity 22 are connected. All the air in the fan blade cavity 22 can be exhausted to the room through the lower air duct 24, the lower air outlet 242 of the air duct shell, and the lower air outlet 111 of the casing, thereby increasing the air volume delivered by the cabinet air conditioner when heating. By controlling the volute tongue 51 to rotate to a suitable position, the air in the fan blade cavity 22 can smoothly enter the upper air duct 23 or the lower air duct 24, reducing air supply resistance, increasing air supply volume, and solving the problem of insufficient air supply volume in existing cabinet air conditioners.

[0035] Preferably, the volute tongue 51 is arc-shaped, and the volute tongue 51 and the fan blade cavity 22 are coaxially arranged, with the profile of the volute tongue 51 being the same as that of the fan blade cavity 22.

[0036] The specific structure of housing 1 is described below. Housing 1 includes a front wall 11, a rear wall 12, a left wall 13, a right wall 14, and a top wall. The front wall 11 and the rear wall 12 are arranged opposite each other front to back, and the left wall 13 and the right wall 14 are arranged opposite each other left to right. The front wall 11, the left wall 13, the rear wall 12, and the right wall 14 are connected sequentially on the horizontal plane and form an upper cavity 161 and a lower cavity 162. The lower end of the front wall 11 forms an organic... The casing has a lower air vent 111; the casing top wall and the base 17 are arranged vertically opposite each other. The casing top wall is located on top of the casing front wall 11, casing rear wall 12, casing left wall 13 and casing right wall 14 and connects the casing front wall 11, casing rear wall 12, casing left wall 13 and casing right wall 14. The casing top wall forms a casing upper air vent 15. The casing left air vent 121 is formed on the left side of the casing rear wall 12, and the casing right air vent 122 is formed on the right side of the casing rear wall 12. The casing 1 is entirely mounted on the base 17.

[0037] The structure required for filtering the air intake of the indoor unit of a cabinet air conditioner is explained below. Filter screens are installed at the upper air vent 15, the lower air vent 111, the left air vent 121, and the right air vent 122 of the unit casing; these can filter the flowing air and improve the quality of the incoming air.

[0038] The following describes the structure required for opening or closing the corresponding air vents of the indoor unit of a cabinet air conditioner, or for guiding the airflow from the air vents. An upper air guide assembly is provided at the upper air vent 15 of the casing. This assembly includes multiple upper air guide plates arranged sequentially and rotatably along the front-rear direction of the casing 1. These upper air guide plates can be controlled to open or close the upper air vent 15, adjust the flow area of ​​the upper air vent 15, or adjust the airflow direction of the upper air vent 15. When the cabinet air conditioner is not in operation, the multiple upper air guide plates can close the upper air vent 15. When the cabinet air conditioner is in operation, the multiple upper air guide plates can open the upper air vent 15. When air is entering through the upper air vent 15, the air intake volume of the upper air vent 15 can be adjusted by controlling the synchronous rotation of the multiple upper air guide plates. When air is exiting through the upper air vent 15, the airflow direction of the upper air vent 15 can be adjusted by controlling the synchronous rotation of the multiple upper air guide plates. And / or, a rotatable lower air guide plate 45 is provided at the lower air vent 111 of the casing. The lower air guide plate 45 can be controlled to open or close the lower air vent 111 of the casing, or to adjust the flow area of ​​the lower air vent 111 of the casing, or to adjust the air outlet direction of the lower air vent 111 of the casing. When the cabinet air conditioner is not running or is running in silent cooling mode, the lower air guide plate 45 can close the lower air vent 111 of the casing. When the cabinet air conditioner is running, the lower air guide plate 45 can open the lower air vent 111 of the casing. When air is entering the lower air vent 111 of the casing, the air intake volume of the lower air vent 111 of the casing can be adjusted by controlling the rotation of the lower air guide plate 45. When air is exiting the lower air vent 111 of the casing, the air outlet direction of the lower air vent 111 of the casing can be adjusted by controlling the rotation of the lower air guide plate 45.

[0039] Figure 6a The simulation cloud diagram provided by the present invention shows the indoor unit of the cabinet air conditioner in heating mode with both the left air vent 121 and the right air vent 122 of the casing closed. Figure 6b The simulation cloud diagram provided by the present invention shows the indoor unit of the cabinet air conditioner in cooling mode with both the left air vent 121 and the right air vent 122 of the casing open; compared with Figure 6a and Figure 6b It can be seen that when both the left air vent 121 and the right air vent 122 of the casing are open, the air volume of the indoor unit of the cabinet air conditioner increases significantly, and the cooling efficiency is greatly improved.

[0040] <Control Methods> like Figure 7 As shown, this embodiment provides a control method for a cabinet air conditioner, the cabinet air conditioner including the indoor unit of the cabinet air conditioner described in any of the above-mentioned embodiments; the control method includes: S1. Obtain the current indoor air temperature; S2. Determine the current operating mode of the indoor unit of the cabinet air conditioner; S3. Based on the current operating mode and the current air temperature, at least coordinate the opening and closing status and opening degree of the left air vent 121 and the right air vent 122 of the casing; The operating modes include cooling mode and heating mode.

[0041] Furthermore, S3 includes: S31. Calculate the temperature difference between the current air temperature and the preset temperature; S32. Determine whether the temperature difference is within the preset temperature range; S33. Based on the current operating mode and the judgment result of whether the temperature difference is within the preset temperature range, at least control the opening and closing status and target opening size of the left air vent 121 and the right air vent 122 of the casing.

[0042] The following explanation pertains to the case where the current operating mode is normal cooling mode. Cooling modes include normal cooling mode. When the current operating mode is normal cooling mode, S33 includes: When the temperature difference exceeds the maximum threshold of the preset temperature range, both the left air vent 121 and the right air vent 122 of the control unit are opened and the target opening degree is the first opening degree. That is, the temperature difference between the indoor air temperature and the user's expected value is large, and the goal should be to cool quickly. By opening both the left air vent 121 and the right air vent 122 of the control unit to the first opening degree, more air is allowed to enter the fan blade cavity 22, exchange heat with the indoor heat exchanger 52, and then be discharged into the room to increase the indoor air temperature. When the temperature difference is within the preset temperature range, both the left air vent 121 and the right air vent 122 of the control unit are in the open state and the target opening degree is the second opening degree; that is, the indoor air temperature gradually approaches the user's expected value. At this time, the air intake and air outlet volume should be controlled to avoid the problem of cold air blowing into people and reducing comfort. When the temperature difference is less than the minimum threshold of the preset temperature range, the left air vent 121 and the right air vent 122 of the housing are both closed; that is, the first lower air inlet flow path 34, the second lower air inlet flow path and the upper air outlet flow path together form a lower air inlet and upper air outlet flow path with air entering through the lower air vent 111 of the housing and exiting through the upper air vent 15 of the housing. The first opening is greater than the second opening; It balances cooling efficiency with comfortable airflow.

[0043] The following description pertains to the situation where the current operating mode is silent cooling mode. Cooling modes include silent cooling mode, and the lower air vent 111 of the casing can be controlled to open or close. When the current operating mode is silent cooling mode, S33 includes: The lower air vent 111 of the control housing is in the closed state; When the temperature difference exceeds the maximum threshold of the preset temperature range, both the left air vent 121 and the right air vent 122 of the control unit are opened and the target opening degree is the first opening degree. That is, the temperature difference between the indoor air temperature and the user's expected value is large, and the goal should be to cool quickly. By opening both the left air vent 121 and the right air vent 122 of the control unit at the first opening degree, the air intake area is increased, thereby accelerating the cooling speed. When the temperature difference is less than or equal to the maximum threshold of the preset temperature range, both the left air vent 121 and the right air vent 122 of the control unit are in the open state and the target opening degree is the second opening degree; that is, the indoor air temperature gradually approaches the user's expected value. At this time, the air intake and air outlet volume should be controlled to balance the noise and air conditioning performance requirements so that the noise is lower than the preset value. The first opening is greater than the second opening; Closing the lower air vent 111 of the casing blocks the transmission of noise and improves indoor comfort.

[0044] The following explanation addresses the situation where the current operating mode is heating mode. When the current operating mode is heating mode, S33 includes: When the temperature difference is within the preset temperature range, both the left air vent 121 and the right air vent 122 of the control unit are in the open state and the target opening degree is the first opening degree; that is, the indoor air temperature gradually approaches the user's expected value. At this time, the air intake and air outlet volume should be controlled to achieve the goal of air supply comfort. Because the indoor air is prone to obvious stratification in the heating mode, the air circulation volume should be increased to improve the overall uniformity of indoor air. When the temperature difference exceeds the maximum threshold of the preset temperature range, both the left air vent 121 and the right air vent 122 of the control unit are opened with the target opening degree being the second opening degree. That is, the temperature difference between the indoor air temperature and the user's expected value is large, and the goal should be rapid heating. When the opening of the left air vent 121 and the right air vent 122 of the control unit is too large, the temperature of the air entering from the left air vent 121 and the right air vent 122 will decrease after mixing with the air after heat exchange with the indoor heat exchanger 52. Therefore, to balance the air intake and the comfort of the air supply, both the left air vent 121 and the right air vent 122 of the control unit are opened with the second opening degree. When the temperature difference is less than the minimum threshold of the preset temperature range, the left air vent 121 and the right air vent 122 of the housing are both closed; that is, the first upper air inlet flow path 33, the second upper air inlet flow path and the lower air outlet flow path together form an upper air inlet and lower air outlet flow path from the upper air vent 15 of the housing to the lower air vent 111 of the housing. The first opening is greater than the second opening; It balances heating efficiency with comfortable airflow.

[0045] In addition, the air vent 15 on the casing can be controlled to open and close, and the opening degree of the air vent 15 on the casing can be adjusted; when the current operating mode is heating mode, S3 also includes: The opening and closing status and opening degree of the upper air vent 15, the left air vent 121, and the right air vent 122 of the casing are coordinated and adjusted.

[0046] Example 2 Unlike Embodiment 1, the left windshield structure 41 and the right windshield structure 42 are configured to: adjust the opening and closing state and opening degree of the left windshield 121 and the right windshield 122 in coordination according to the air intake volume of the left air inlet 221 and the right air inlet 222 of the fan blade cavity, and / or the overall appearance of the housing 1, and / or the distribution of obstructions on the exterior of the housing 1 and near the left air inlet 121 and the right air inlet 122 of the housing. Specifically, the indoor unit of a cabinet air conditioner will have different visual effects when installed at different angles in the room. Although a larger opening of the left air vent 121 and the right air vent 122 of the casing can bring a larger air intake, at certain angles the left wind deflector structure 41 and the right wind deflector structure 42 may affect the user's perception and the overall aesthetics of the casing 1. At this time, the user can control one of the left air vent 121 and the right air vent 122 of the casing to open and the other to close, thereby reducing or closing the opening of the corresponding air vent on the side that affects the perception, thus balancing air conditioning performance and appearance. When there is an obstruction on the left or right side of the exterior of the housing 1, the opening of the left air vent 121 and the right air vent 122 of the housing may be affected. In this case, the user can control one of the left air vent 121 and the right air vent 122 of the housing to open and the other to close, so as to avoid damage to the obstruction when the left windshield structure 41 or the right windshield structure 42 moves.

[0047] Exemplary embodiments of this disclosure have been specifically shown and described above. It should be understood that this disclosure is not limited to the detailed structures, arrangements, or implementations described herein; rather, this disclosure is intended to cover various modifications and equivalent arrangements contained within the spirit and scope of the appended claims.

Claims

1. A cabinet-type air conditioner indoor unit, characterized in that, It includes a casing (1), an indoor heat exchanger (52), and a duct casing (21); the upper end of the casing wall of the casing (1) forms an upper casing air outlet (15), the lower front end of the casing wall of the casing (1) forms a lower casing air outlet (111), the left rear side forms a left casing air outlet (121), and the right rear side forms a right casing air outlet (122); the upper casing air outlet (15), the lower casing air outlet (111), the left casing air outlet (121), and the right casing air outlet (122) are all connected to the indoor environment; the opening and closing state and the opening degree of the left casing air outlet (121) and the right casing air outlet (122) can be independently controlled; The housing (1) has an upper cavity (161) and a lower cavity (162) arranged opposite to each other; the indoor heat exchanger (52) is disposed in the upper cavity (161) and the air duct shell (21) is disposed in the lower cavity (162); The housing (1) and the air duct housing (21) together form a first air inlet and outlet airflow path and a second air inlet and outlet airflow path. The first air inlet and outlet airflow path is formed by at least one of the left air vent (121) and the right air vent (122) of the housing and the upper air vent (15) of the housing, and the air vent (111) of the housing. The second air inlet and outlet airflow path is formed by at least one of the left air vent (121) and the right air vent (122) of the housing and the lower air vent (111) of the housing, and the air vent (15) of the housing, and the air vent (15) of the housing.

2. The cabinet-type air conditioner indoor unit according to claim 1, characterized in that, The upper end of the shell wall of the air duct housing (21) is formed with an upper air duct housing inlet (232) and the lower end of the shell wall is formed with a lower air duct housing inlet (242); the interior of the air duct housing (21) is formed with an upper air duct (23), a fan blade cavity (22) and a lower air duct (24) arranged sequentially from top to bottom; the shell wall of the air duct housing (21) is formed with an upper return air inlet (231) at the position corresponding to the upper air duct (23) and a fan blade cavity inlet at the position corresponding to the fan blade cavity (22); the fan blade cavity inlet includes a left fan blade cavity inlet (221) arranged corresponding to the left air duct (121) of the housing and a right fan blade cavity inlet (222) arranged corresponding to the right air duct (122) of the housing; An air inlet cavity (3) is formed between the housing (1) and the air duct housing (21); the air inlet cavity (3) connects the left air outlet (121) of the housing and the left air inlet (221) of the fan blade cavity and forms a left air inlet flow path (31); the air inlet cavity (3) connects the right air outlet (122) of the housing and the right air inlet (222) of the fan blade cavity and forms a right air inlet flow path (32); The air inlet cavity (3) is connected to the upper return air inlet (231), the left air inlet (221) of the fan blade cavity and the right air inlet (222) of the fan blade cavity to form a first upper air inlet flow path (33). The upper cavity body (161), the upper air inlet (232) of the air duct shell, the upper air duct (23) and the upper return air inlet (231) are connected in sequence to form a second upper air inlet flow path. The fan blade cavity (22), the lower air duct (24), the lower air inlet (242) of the air duct shell and the lower air inlet (111) of the casing are connected in sequence to form a lower air outlet flow path. The left air intake path, right air intake path, first upper air intake path, second upper air intake path, and lower air outlet path together form the first air intake and exhaust path.

3. The cabinet-type air conditioner indoor unit according to claim 2, characterized in that, The shell wall of the air duct shell (21) has a lower return air inlet (241) formed at the position corresponding to the lower air duct (24); The air inlet cavity (3) is connected to the lower return air inlet (241), the left air inlet (221) of the fan blade cavity, and the right air inlet (222) of the fan blade cavity to form a first lower air inlet flow path (34); the lower air inlet (111) of the casing, the lower air inlet (242) of the air duct casing, the lower air duct (24) and the lower return air inlet (241) are connected in sequence to form a second lower air inlet flow path; the fan blade cavity (22), the upper air duct (23), the upper air inlet (232) of the air duct casing, the upper cavity (161) and the upper air inlet (15) of the casing are connected in sequence to form an upper air outlet flow path; The left air intake path (31), right air intake path (32), first lower air intake path (34), second lower air intake path and upper air outlet path together form the second air intake and exhaust path.

4. The cabinet-type air conditioner indoor unit according to claim 3, characterized in that, Both the upper return air inlet (231) and the lower return air inlet (241) can be controlled to open or close, and the connection or disconnection between the upper air duct (23) and the fan blade cavity (22) and between the lower air duct (24) and the fan blade cavity (22) can be controlled to be controlled to be connected or disconnected. When the upper return air vent (231) is closed, the upper air duct (23) and the fan blade cavity (22) are connected, the lower return air vent (241) is open, and the lower air duct (24) and the fan blade cavity (22) are disconnected, the cabinet air conditioner indoor unit forms the first lower air intake path (34), the second lower air intake path, and the upper air outlet path; When the upper return air vent (231) is in the open state, the upper air duct (23) and the fan blade cavity (22) are in the disconnected state, the lower return air vent (241) is in the closed state, and the lower air duct (24) and the fan blade cavity (22) are in the connected state, the cabinet air conditioner indoor unit forms the first upper air intake flow path (33), the second upper air intake flow path, and the lower air outlet flow path.

5. The cabinet-type air conditioner indoor unit according to claim 2, characterized in that, A left air baffle structure (41) is provided at the left air vent (121) of the housing. The left air baffle structure (41) can be controlled to move to open and close the left air vent (121) of the housing and / or adjust the opening size of the left air vent (121). When the left air vent (121) of the housing is in the open state, the cabinet air conditioner indoor unit forms the left air intake path (31). A right air vent (122) is provided at the right air vent (122) of the housing. The right air vent (42) can be controlled to move to open and close the right air vent (122) of the housing and / or adjust the opening size of the right air vent (122). When the right air vent (122) of the housing is in the open state, the cabinet air conditioner indoor unit forms the right air intake path (32).

6. The cabinet-type air conditioner indoor unit according to claim 5, characterized in that, The left windshield structure (41) and the right windshield structure (42) are configured to: adjust the opening and closing state and opening degree of the left air vent (121) and the right air vent (122) of the casing in coordination according to the operating mode of the indoor unit of the cabinet air conditioner and the indoor air temperature; The operating modes include cooling mode and heating mode.

7. The cabinet-type air conditioner indoor unit according to claim 5, characterized in that, It also includes a fan, which includes a fan blade (25) and a motor. The fan blade (25) is rotatably disposed in the fan blade cavity (22) for providing power to the air. The motor is disposed outside the air duct shell (21) and located at one axial end of the fan blade cavity (22). The output shaft of the motor is drivenly connected to the fan blade (25) for driving the fan blade (25) to rotate. The left windshield structure (41) and the right windshield structure (42) are configured to: adjust the opening and closing state and opening degree of the left windshield air inlet (221) and the right windshield air inlet (222) according to the air intake volume of the left windshield air inlet (221) and the right windshield air inlet (222) of the windshield cavity, and / or the overall appearance of the housing (1), and / or the distribution of obstructions on the exterior of the housing (1) and near the left windshield air inlet (121) and the right windshield air inlet (122).

8. A control method for a cabinet-type air conditioner, characterized in that, The cabinet air conditioner includes the indoor unit of the cabinet air conditioner as described in any one of claims 3 to 7; the control method includes: Obtain the current indoor air temperature; Determine the current operating mode of the indoor unit of the cabinet air conditioner; Based on the current operating mode and the current air temperature, at least the opening and closing status and opening degree of the left air vent (121) and the right air vent (122) of the casing are adjusted in a coordinated manner. The operating modes include cooling mode and heating mode.

9. The control method for a cabinet air conditioner according to claim 8, characterized in that, The step of coordinating the opening and closing states and opening degrees of the left air vent (121) and right air vent (122) of the casing based on the current operating mode and the current air temperature includes: Calculate the temperature difference between the current air temperature and the preset temperature; Determine whether the temperature difference is within the preset temperature range; Based on the current operating mode and the judgment result of whether the temperature difference is within the preset temperature range, at least the opening and closing status and target opening size of the left air vent (121) and the right air vent (122) of the casing are controlled.

10. The control method for a cabinet air conditioner according to claim 9, characterized in that, The cooling mode includes a conventional cooling mode; when the current operating mode is the conventional cooling mode, the control of the opening and closing status and target opening size of the left air vent (121) and the right air vent (122) of the casing, based on the current operating mode and the judgment result of whether the temperature difference is within the preset temperature range, includes: When the temperature difference is greater than the maximum threshold of the preset temperature range, the left air vent (121) and the right air vent (122) of the housing are both controlled to be in the open state and the target opening size is the first opening size; When the temperature difference is within the preset temperature range, the left air vent (121) and the right air vent (122) of the housing are both controlled to be open and the target opening size is the second opening size; When the temperature difference is less than the minimum threshold of the preset temperature range, the left air vent (121) and the right air vent (122) of the housing are both controlled to be closed. Wherein, the first opening degree is greater than the second opening degree.

11. The control method for a cabinet air conditioner according to claim 9, characterized in that, The cooling mode includes a silent cooling mode, and the lower air vent (111) of the casing can be controlled to open or close; when the current operating mode is the silent cooling mode, the control of the opening and closing status and target opening size of at least the left air vent (121) and the right air vent (122) of the casing, based on the current operating mode and the judgment result of whether the temperature difference is within the preset temperature range, includes: The lower air vent (111) of the housing is controlled to be in the closed state; When the temperature difference is greater than the maximum threshold of the preset temperature range, the left air vent (121) and the right air vent (122) of the housing are both controlled to be in the open state and the target opening size is the first opening size; When the temperature difference is less than or equal to the maximum threshold of the preset temperature range, the left air vent (121) and the right air vent (122) of the housing are both controlled to be in the open state and the target opening size is the second opening size; Wherein, the first opening degree is greater than the second opening degree.

12. The control method for a cabinet air conditioner according to claim 9, characterized in that, When the current operating mode is the heating mode, the step of controlling the opening and closing status and target opening size of the left air vent (121) and the right air vent (122) of the casing, based on the current operating mode and the judgment result of whether the temperature difference is within the preset temperature range, includes: When the temperature difference is within the preset temperature range, the left air vent (121) and the right air vent (122) of the housing are both controlled to be open and the target opening size is the first opening size; When the temperature difference is greater than the maximum threshold of the preset temperature range, the left air vent (121) and the right air vent (122) of the housing are both controlled to be in the open state and the target opening size is the second opening size; When the temperature difference is less than the minimum threshold of the preset temperature range, the left air vent (121) and the right air vent (122) of the housing are both controlled to be closed. Wherein, the first opening degree is greater than the second opening degree.

13. The control method for a cabinet air conditioner according to claim 8, characterized in that, The upper air vent (15) of the casing can be controlled to open and close, and the opening degree of the upper air vent (15) of the casing can be adjusted; when the current operating mode is the heating mode, the step of coordinating the opening and closing state and opening degree of the left air vent (121) and the right air vent (122) of the casing according to the current operating mode and the current air temperature further includes: The opening and closing status and opening degree of the upper air vent (15), left air vent (121) and right air vent (122) of the housing are coordinated and adjusted.

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