Air duct assembly, cabinet air conditioner indoor unit and control method

Abstract

The present invention relates to the field of air conditioning technology, and in particular to an air duct assembly, a cabinet air conditioner indoor unit and a control method. The air duct assembly comprises: an air duct shell, wherein a plurality of air ducts are separated inside, each air duct comprises an upper air duct, a fan cavity and a lower air duct which are sequentially connected from top to bottom, an upper air duct wall of each upper air duct is provided with an upper air guide port, and a lower air duct wall of each lower air duct is provided with a lower air guide port. The air duct shell also forms a connecting passage penetrating the air duct shell along the axial direction of the fan cavity; a plurality of fans are arranged in the fan cavities of the plurality of air ducts in a one-to-one correspondence; a plurality of upper wind shielding components are arranged at the upper air guide ports of the plurality of air ducts, for controlling the opening and closing of the upper air guide ports and the connection between the upper air duct and the fan cavity; a plurality of lower wind shielding components are arranged at the lower air guide ports of the plurality of air ducts, for controlling the opening and closing of the lower air guide ports and the connection between the lower air duct and the fan cavity. The present invention improves the uniformity of indoor ambient temperature in the height direction, reduces the power consumption of temperature regulation and improves the comfort of the indoor environment.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to an air duct component, a cabinet air conditioner indoor unit and a control method. Background Art

[0002] In the related art, the positions of the air supply and return air outlets of the air conditioner remain relatively unchanged, and the temperature of the indoor air will be stratified along the height direction. The air with high temperature gathers at high altitudes due to its low density, and the air with low temperature gathers at low altitudes due to its high density. As a result, the air conditioner with fixed air supply and return air positions cannot take into account various working conditions. Under certain working conditions, there is uneven temperature stratification in the height direction (thermal stratification phenomenon), and energy saving and comfort cannot reach the optimal level. Summary of the invention

[0003] In order to overcome the problem in the related art that the positions of the air supply and return air outlets of the air conditioner are relatively unchanged, resulting in uneven distribution of the temperature of the indoor air in the height direction, poor energy saving and comfort experience, the first aspect of the present invention proposes an air duct assembly, the air duct assembly comprising:

[0004] An air duct shell, wherein a plurality of air ducts are separated inside, each air duct comprises an upper air duct, a fan cavity and a lower air duct which are sequentially connected from top to bottom, an upper air guide port is provided on the air duct wall of each upper air duct, and a lower air guide port is provided on the air duct wall of each lower air duct, and the air duct shell also forms a connecting passage, and the connecting passage penetrates the air duct shell along the axial direction of the fan cavity;

[0005] A plurality of fans, which are arranged in the fan cavities of the plurality of air ducts in a one-to-one correspondence, and the fans are centrifugal fans;

[0006] A plurality of upper wind shield components and a plurality of lower wind shield components, the plurality of upper wind shield components are arranged at the upper air ducts of the plurality of air ducts in a one-to-one correspondence, the upper wind shield components are designed to block the connection between the upper air duct and the fan cavity while opening the upper air duct or to connect the upper air duct with the fan cavity while closing the upper air duct; the plurality of lower wind shield components are arranged at the lower air ducts of the plurality of air ducts in a one-to-one correspondence, the lower wind shield components are designed to block the connection between the lower air duct and the fan cavity while opening the lower air duct or to connect the lower air duct with the fan cavity while closing the lower air duct.

[0007] In some embodiments, the plurality of fan cavities of the air duct shell are staggered along the height direction, width direction and / or thickness direction of the air duct shell.

[0008] In some embodiments, the plurality of fan cavities of the air duct shell are staggered along the height direction of the air duct shell, and the connecting passage is located between any two adjacent fan cavities.

[0009] In some embodiments, the air duct wall includes a first shell surface and a second shell surface located on both sides of the fan cavity in the axial direction, and the air duct assembly also includes a sealing cover, which is arranged on the first shell surface and covers the outer periphery of the connecting channel and the multiple fans. The sealing cover and the first shell surface are combined to form a ventilation cavity, and the connecting channel connects the ventilation cavity with the space located on one side of the second shell surface.

[0010] A second aspect of the present invention provides a cabinet-type air-conditioning indoor unit, the cabinet-type air-conditioning indoor unit comprising:

[0011] A shell, wherein an upper air inlet and an upper air outlet are provided at an upper portion of the shell, and a lower air inlet and a lower air outlet are provided at a lower portion of the shell;

[0012] The air duct assembly proposed in the first aspect of the present invention is arranged in the shell, and a shell channel is formed between the air duct assembly and the shell, the upper air duct is communicated with the upper air port, and the upper air duct is communicated with the shell channel when the upper wind shielding component opens the upper air guide port, the lower air duct is communicated with the lower air port, and the lower air duct is communicated with the shell channel when the lower wind shielding component opens the lower air guide port, and the upper air inlet and the lower air inlet are both communicated with the shell channel;

[0013] The heat exchanger assembly is arranged in the shell channel and is used for exchanging heat for the airflow passing through the shell channel. The airflow after heat exchange by the heat exchanger assembly is sucked into the fan cavity through the fan.

[0014] In some embodiments, the cabinet air conditioner indoor unit has a single upper air outlet mode, a single lower air outlet mode, and a upper and lower simultaneous air outlet mode;

[0015] When the cabinet air conditioner indoor unit is in the single upper air outlet mode, all upper wind shielding components close the corresponding upper air guide ports and make the corresponding upper air ducts communicate with the fan cavity, and all lower wind shielding components open the corresponding lower air guide ports and block the communication between the corresponding lower air ducts and the fan cavity;

[0016] When the cabinet air conditioner indoor unit is in the single lower air outlet mode, all upper wind shielding components open the corresponding upper air guide ports and block the connection between the corresponding upper air duct and the fan cavity, and all lower wind shielding components close the corresponding lower air guide ports and connect the corresponding lower air duct to the fan cavity;

[0017] When the cabinet air-conditioning indoor unit is in the upper and lower simultaneous air outlet mode, all upper wind shielding components close the corresponding upper air guide outlets while connecting the corresponding upper air ducts with the fan cavity, and all lower wind shielding components close the corresponding lower air guide outlets while connecting the corresponding lower air ducts with the fan cavity.

[0018] In some embodiments, a sealing cover is provided on the first shell surface of the air duct shell, the heat exchanger assembly is arranged close to the second shell surface of the air duct shell, and the first shell surface is arranged opposite to the second shell surface.

[0019] A third aspect of the present invention provides a control method for a cabinet air conditioner indoor unit, the control method being applied to the cabinet air conditioner indoor unit provided in the second aspect of the present invention, the control method comprising:

[0020] Obtain the indoor ambient temperature and the operating mode of the indoor unit of the cabinet air conditioner;

[0021] determining a plurality of temperature determination values ​​according to the operation mode;

[0022] The indoor environment temperature is compared with the multiple temperature judgment values, and the air outlet mode of the cabinet air conditioner indoor unit and the start-up status of the multiple fans are controlled according to the comparison result.

[0023] In some embodiments, the plurality of fan chambers of the air duct housing are staggered along the height direction of the air duct housing. When the cabinet air conditioner indoor unit operates in a cooling mode, the temperature judgment value corresponding to the cooling mode is a first set temperature and a second set temperature, the first set temperature> the second set temperature, the indoor ambient temperature is compared with the plurality of temperature judgment values, and the air outlet mode of the cabinet air conditioner indoor unit and the start-up state of the plurality of fans are controlled according to the comparison result, including:

[0024] When the indoor ambient temperature is greater than the first set temperature, the air outlet mode of the cabinet air conditioner indoor unit is controlled to be a top and bottom simultaneous air outlet mode, and the multiple fans are controlled to start running;

[0025] When the second set temperature is less than or equal to the indoor ambient temperature less than or equal to the first set temperature, the air outlet mode of the indoor unit of the cabinet air conditioner is controlled to be a single upper air outlet mode, the fan located at the upper part is controlled to start running, and the fan located at the lower part is controlled to stop running;

[0026] When the indoor ambient temperature is less than the second set temperature, the air outlet mode of the indoor unit of the cabinet air conditioner is controlled to be a single upper air outlet mode, the fan located at the upper part is controlled to stop running, and the fan located at the lower part is controlled to start running.

[0027] In some implementations, when the cabinet air conditioner indoor unit operates in a heating mode, the temperature judgment values ​​corresponding to the heating mode are a third set temperature and a fourth set temperature, the third set temperature is less than the fourth set temperature, the indoor ambient temperature is compared with the multiple temperature judgment values, and the air outlet mode of the cabinet air conditioner indoor unit and the start-up state of the multiple fans are controlled according to the comparison result, including:

[0028] When the indoor ambient temperature is less than the third set temperature, the air outlet mode of the cabinet air conditioner indoor unit is controlled to be a top and bottom simultaneous air outlet mode, and the multiple fans are controlled to start running;

[0029] When the third set temperature is less than or equal to the indoor ambient temperature and less than or equal to the fourth set temperature, the air outlet mode of the indoor unit of the cabinet air conditioner is controlled to be a single bottom air outlet mode, the fan located at the bottom is controlled to start running, and the fan located at the top is controlled to stop running;

[0030] When the indoor ambient temperature is greater than the fourth set temperature, the air outlet mode of the indoor unit of the cabinet air conditioner is controlled to be a single bottom air outlet mode, the fan located at the bottom is controlled to stop running, and the fan located at the top is controlled to start running.

[0031] The technical solution of the present invention may include the following beneficial effects: the present invention arranges a plurality of independent air ducts in the air duct shell of the air duct assembly, and a fan is provided in the fan cavity of each air duct, and an upper air duct is provided in the upper air duct of each air duct, and a lower air duct is provided in the lower air duct, and the upper air duct is opened and closed by the upper wind shield component while controlling the connection and disconnection of the fan cavity and the upper air duct, and the lower air shield component is opened and closed while controlling the connection and disconnection of the fan cavity and the lower air duct.

[0032] In the application scenario of the cabinet air conditioner indoor unit, different air inlet and outlet modes can be realized under different working conditions and temperatures by cooperating with the air inlet and air outlet of the cabinet air conditioner indoor unit. In the cooling mode, the upper air shield component can be controlled to close the upper air duct, and the lower air shield component can be controlled to open the lower air duct, so that air can enter the lower air duct, thereby realizing the upper air outlet and lower return air mode, and the cold air sinking principle can be used to improve the uniformity of the cold air distribution in the indoor height direction, improve the cooling effect of the air conditioner, and achieve the purpose of energy saving; in the heating mode, the upper air shield component can be controlled to open the upper air duct, and the lower air shield component can be controlled to close the lower air duct, so that air can enter the upper air duct, thereby realizing the lower air outlet and upper return air mode, and the hot air floating principle can be used to improve the uniformity of the cold air distribution in the indoor height direction, reduce the temperature rise time and reduce the wind sense index, and improve the comfort effect. Moreover, in the early stage of cooling or heating, when the indoor ambient temperature is greatly different from the temperature set by the user, the upper wind shield component can be controlled to close the upper air duct, and the lower wind shield component can be controlled to close the lower air duct, so as to achieve simultaneous air outlet from top and bottom, realize enveloping cooling or heating, and speed up the efficiency of indoor temperature control.

[0033] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0035] Figure 1 1 is a second shell surface perspective view of an air duct assembly according to an exemplary embodiment.

[0036] Figure 2 1 is a first shell surface perspective view of an air duct assembly according to an exemplary embodiment.

[0037] Figure 3 is a diagram showing the internal structure of an air duct assembly according to an exemplary embodiment.

[0038] Figure 4 is a cross-sectional view of an air duct assembly according to an exemplary embodiment.

[0039] Figure 5 The diagram is a position diagram of an upper air vent, an upper air inlet, a lower air vent and a lower air inlet at different viewing angles of a cabinet air conditioner indoor unit according to an exemplary embodiment.

[0040] Figure 6 is an exploded view of a cabinet-type air-conditioner indoor unit according to an exemplary embodiment.

[0041] Figure 7 is a structural diagram of a heat exchanger assembly according to an exemplary embodiment.

[0042] Figure 8 and Fig. 9 The figure is an air flow path diagram of an upper air outlet mode of an indoor unit of a cabinet air conditioner according to an exemplary embodiment.

[0043] Fig.10 and Fig.11 The figure is an airflow path diagram of a downward air outlet mode of an indoor unit of a cabinet-type air conditioner according to an exemplary embodiment.

[0044] Fig.12 and Fig.13 The figure is an airflow path diagram of a cabinet-type air conditioner indoor unit that blows air up and down simultaneously according to an exemplary embodiment.

[0045] Fig.14 The present invention is one of the control flow charts of a cabinet type air conditioner indoor unit according to an exemplary embodiment.

[0046] Fig.15This is a second control flow chart of a cabinet air conditioner indoor unit according to an exemplary embodiment.

[0047] Fig.16 This is a third control flow chart of a cabinet air conditioner indoor unit according to an exemplary embodiment.

[0048] The reference numerals are as follows:

[0049] 1. Shell; 1a. Air inlet component; 1b. Panel component; 1c. Top cover component; 1d. Base component; 1f. Left side panel; 1g. Right side panel; 11. Upper air outlet; 12. Upper air inlet; 13. Lower air outlet; 14. Lower air inlet; 15. Shell channel; 2. Air duct assembly; 21. Air duct shell; 211. First air duct shell; 212. Second air duct shell; 213. Upper air guide; 214. Lower air guide; 215. Connecting channel; 22. Upper wind shield component; 23. Lower wind shield Component; 24, sealing cover; 201, first air duct; 2011, first upper air duct; 2012, first lower air duct; 2013, first fan cavity; 2014, first shell surface; 2015, second shell surface; 202, second air duct; 2021, second upper air duct; 2022, second lower air duct; 2023, second fan cavity; 3, upper ventilation frame; 4, lower ventilation frame; 5, first fan; 6, second fan; 7, heat exchanger assembly; 71, upper heat exchange section; 72, lower heat exchange section. DETAILED DESCRIPTION

[0050] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.

[0051] Since the positions of the air supply and return air outlets of the indoor unit of the current cabinet air conditioner remain unchanged, the blown air will cause the indoor temperature to be stratified in the height direction, affecting the comfort of the indoor environment and the energy saving of the air conditioner. In order to solve this problem, this embodiment proposes an air duct assembly, which includes an air duct shell, wherein a plurality of air ducts are separated in the air duct shell, each air duct includes an upper air duct, a fan cavity and a lower air duct arranged in sequence from top to bottom, a fan is arranged in the fan cavity, an upper air duct wall of each upper air duct is provided, and a lower air duct wall of each lower air duct is provided, an upper wind shield component is provided at the upper air duct, and a lower wind shield component is provided at the lower air duct, the upper wind shield component controls the opening and closing of the upper air duct while controlling the connection between the fan cavity and the upper air duct, and the lower wind shield component controls the opening and closing of the lower air duct while controlling the connection between the fan cavity and the lower air duct, and the air duct shell is provided with a connecting channel, and the connecting channel penetrates the air duct shell along the axial direction of the fan cavity, so that the airflow on both sides of the axial direction of the fan cavity can flow through the connecting channel.

[0052] In the application scenario of the cabinet air conditioner indoor unit, the air duct assembly of this embodiment cooperates with the air inlet and air outlet of the cabinet air conditioner indoor unit to realize different air inlet and outlet modes under different working conditions and different temperatures. In the cooling mode, the upper air shield component can be controlled to close the upper air guide port, and the lower air shield component can be controlled to open the lower air guide port, so that the lower air guide port is allowed to enter, thereby realizing the upper air outlet and lower return air mode, and the cold air sinking principle is used to improve the uniformity of the cold air distribution in the indoor height direction, improve the cooling effect of the air conditioner, and achieve the purpose of energy saving; in the heating mode, the upper air shield component can be controlled to open the upper air guide port, and the lower air shield component can be controlled to close the lower air guide port, so that the upper air guide port is allowed to enter, thereby realizing the lower air outlet and upper return air mode, and the hot air floating principle is used to improve the uniformity of the cold air distribution in the indoor height direction, reduce the temperature rise time and reduce the wind feeling index, and improve the comfort of the air conditioner. In addition, in the early stage of cooling or heating, when the indoor ambient temperature is greatly different from the user-set temperature, the upper air shield component can also be controlled to close the upper air guide port. The lower wind shield component closes the lower air guide port, thereby achieving upper and lower air outlets simultaneously, realizing surround cooling or heating, and speeding up the efficiency of indoor temperature control.

[0053] The technical solution of this embodiment is described in detail below in conjunction with the accompanying drawings. The following implementation modes and examples may be combined with each other if there is no conflict.

[0054] According to an exemplary embodiment, Figure 1-Figure 4 As shown, this embodiment provides an air duct assembly 2, which includes an air duct housing 21, a plurality of fans, a plurality of upper wind shielding components 22 and a plurality of lower wind shielding components 23, wherein:

[0055] A plurality of air ducts are arranged inside the air duct housing 21, and each air duct includes an upper air duct, a fan chamber and a lower air duct arranged in sequence from top to bottom. An upper air guide port 213 is arranged on the air duct wall of each upper air duct, and a lower air guide port 214 is arranged on the air duct wall of each lower air duct. An upper volute tongue is arranged on one side of the fan chamber close to the upper air duct, and the airflow generated by the rotation of the fan in the fan chamber can enter the upper air duct through the upper volute tongue; a lower volute tongue is arranged on one side of the fan chamber close to the lower air duct, and the airflow generated by the rotation of the fan in the fan chamber can enter the lower air duct through the lower volute tongue.

[0056] In a preferred embodiment, Figure 1 As shown, the air duct shell 21 includes a first air duct shell 211 and a second air duct shell 212, the first air duct shell 211 and the second air duct shell 212 are buckled together along the thickness direction of the air duct shell 21, and a plurality of ribs are provided in the first air duct shell 211 or the second air duct shell 212 for separating each air duct and each fan cavity. When the first air duct shell 211 and the second air duct shell 212 are buckled together, the first air duct shell 211, the second air duct shell 212 and the plurality of ribs enclose an upper air duct, a lower air duct and a fan cavity. In the application scenario of the cabinet air conditioner indoor unit, the two sides of the fan cavity in the axial direction can be located on the left and right sides of the cabinet air conditioner indoor unit, or on the front and rear sides of the cabinet air conditioner indoor unit, and can be flexibly designed according to the internal space layout requirements of the cabinet air conditioner indoor unit. In order to reduce the space occupied by the air duct assembly 2, the air duct walls of the two adjacent upper air ducts are at least partially fitted, and the air duct walls of the two adjacent lower air ducts are at least partially fitted. Alternatively, two adjacent upper air ducts share a portion of the upper air duct wall, and two adjacent lower air ducts share a portion of the lower air duct wall. Preferably, the multiple fan cavities of the air duct shell 21 are staggered along the height direction, width direction and / or thickness direction of the air duct shell 21 to reduce the volume of the air duct shell 21.

[0057] Furthermore, the air duct housing 21 is provided with a communication channel 215, which penetrates the air duct housing 21 on both sides of the axial direction of the fan chamber, so that the airflow on both sides of the axial direction of the fan chamber can flow through the communication channel 215. The setting position of the communication channel 215 in the air duct housing 21 is not limited, and can be set at the upper part, lower part or middle position of the air duct housing 21. In a preferred embodiment, as Figure 2 As shown, the multiple fan cavities of the air duct housing 21 are staggered along the height direction of the air duct housing 21, and the connecting channel 215 is located between any two adjacent fan cavities to reduce the space occupied by the air duct assembly 2.

[0058] At the same time, the upper air duct can be further extended obliquely upward in the air duct shell 21, and the lower air duct can be extended obliquely downward in the air duct shell 21, and the upper air duct and the lower air duct can extend in opposite directions in the air duct, and the extension directions of multiple upper air ducts are the same, and the extension directions of multiple lower air ducts are the same. This embodiment reasonably designs the layout of the upper air duct and the lower air duct in the limited space in the air duct shell 21, and can further reduce the space occupied by the entire air duct assembly 2 while ensuring that the wind blown out from the fan cavity can be blown out smoothly from the upper air duct and the lower air duct. At the same time, the lengths of the upper air duct and the lower air duct are different, that is, each air duct includes a longer air duct and a shorter air duct, and it is also possible to discharge air from the shorter air duct alone, the longer air duct alone, or the longer air duct and the shorter air duct at the same time according to the control requirements of the indoor ambient temperature.

[0059] like Figure 2 and Figure 3 As shown, multiple fans are arranged one by one in the fan cavities of multiple air ducts, and air inlet ends are provided at both ends of the axial direction of the fan. The fan can suck air into the fan cavity from the air inlet ends at both ends of the axial direction, thereby increasing the air intake volume. The fan is exemplarily a centrifugal fan.

[0060] like Figure 3 As shown, a plurality of upper wind shielding components 22 are arranged one by one at the upper air ducts 213 of the plurality of air ducts, and the upper wind shielding components 22 are designed to block the connection between the upper air duct and the fan cavity when the upper air duct 213 is opened, or to connect the upper air duct with the fan cavity when the upper air duct 213 is closed; a plurality of lower wind shielding components 23 are arranged one by one at the lower air ducts 214 of the plurality of air ducts, and the lower wind shielding components 23 are designed to block the connection between the lower air duct and the fan cavity when the lower air duct 214 is opened, or to connect the lower air duct with the fan cavity when the lower air duct 214 is closed. In an achievable manner, the upper wind shielding component 22 includes a baffle and a drive motor, the baffle is rotatably arranged at the upper air duct 213, and the drive motor drives the baffle to switch between a position of opening the upper air duct 213 and a position of closing the upper air duct 213, thereby realizing different conduction states, and the lower wind shielding component 23 can also adopt the same combination of a baffle and a drive motor, which will not be repeated here.

[0061] The air duct assembly 2 of this embodiment, when applied to the indoor unit of a cabinet air conditioner, can realize single upper air outlet, single lower air outlet and upper and lower simultaneous air outlet by cooperating with the air inlet and air outlet of the indoor unit of the cabinet air conditioner. When the upper air outlet is single, all lower air ducts are air inlet ducts, and all upper air ducts are air outlet ducts, thereby increasing the heat exchange of the air flow on the lower side of the indoor environment, which helps to improve the uniformity of the temperature of the cold air in the height direction of the indoor environment in the cooling mode, and at the same time improves the cooling capacity of the air conditioner to achieve the purpose of energy saving. When the lower air outlet is single, all upper air ducts are air inlet ducts, and all lower air ducts are air outlet ducts, thereby increasing the heat exchange of the air flow on the upper side of the indoor environment, which helps to improve the uniformity of the temperature of the hot air in the height direction of the indoor environment in the heating mode, and at the same time reduces the temperature rise time and reduces the wind feeling index, and improves the comfort of the air conditioner. In addition, when the upper and lower air outlets are simultaneously, all upper air ducts and all lower air ducts are air outlet ducts, which increases the air volume, forms an embracing heat exchange for the indoor environment, and increases the cooling or heating efficiency.

[0062] In some embodiments, Figure 1 , Figure 2 and Figure 6 As shown, the air duct wall includes a first shell surface 2014 and a second shell surface 2015 located on both sides of the fan cavity in the axial direction, and the air duct assembly 2 also includes a sealing cover 24, which is arranged on the first shell surface 2014 and covers the outer periphery of the connecting channel 215 and multiple fans. The sealing cover 24 and the first shell surface 2014 enclose a ventilation cavity, and the surrounding edges of the sealing cover 24 are sealed and connected with the second shell surface 2015 to prevent the airflow outside the sealing cover 24 from directly entering the ventilation cavity without heat exchange by the heat exchanger assembly 7. The connecting channel 215 connects the ventilation cavity with the space located on one side of the second shell surface 2015, and a part of the airflow located on one side of the second shell surface 2015 is sucked into the fan cavity by the air inlet end of the fan away from the sealing cover 24, and the other part enters the ventilation cavity through the connecting channel 215 and is sucked into the fan cavity by the air inlet end of the fan located on one side of the sealing cover 24. When the air duct assembly 2 is applied to the indoor unit of a cabinet air conditioner, the heat exchanger assembly 7 can be arranged only on the side close to the second shell surface 2015. After the airflow after heat exchange by the heat exchanger assembly 7 enters the space between the second shell surface 2015 of the air duct shell 21 and the heat exchanger assembly 7, it is sucked into the fan cavity by the air inlet ends at both ends of the fan axis, thereby reducing the space occupied by the radiator assembly and helping to reduce the size of the entire machine. At the same time, the sealing cover 24 also plays a role in isolating the fan noise, which greatly increases the fan speed when the noise meets the requirements.

[0063] The air duct assembly 2 of this embodiment is described in detail below with reference to a specific example.

[0064] The air duct shell 21 is provided with a first air duct 201 and a second air duct 202. The first air duct 201 includes a first upper air duct 2011, a first fan cavity 2013 and a first lower air duct 2012 which are connected in sequence from top to bottom. The second air duct 202 includes a second upper air duct 2021, a second fan cavity 2023 and a second lower air duct 2022 which are connected in sequence from top to bottom. The air duct walls of the first upper air duct 2011 and the second upper air duct 2021 are respectively provided with upper air guide ports 213, and the air duct walls of the first lower air duct 2012 and the second lower air duct 2022 are respectively provided with lower air guide ports 214. An upper wind shielding component 22 is provided at each upper air guide port 213, and a lower wind shielding component 23 is provided at each lower air guide port 214. The first upper air duct 2011 and the second upper air duct 2021 share a portion of the upper air duct wall, and the first lower air duct 2012 and the second lower air duct 2022 share a portion of the lower air duct wall. A connecting passage 215 is also formed between the first fan cavity 2013 and the second fan cavity 2023. The air duct shell 21 includes a first shell surface 2014 and a second shell surface 2015 arranged along its thickness direction. The first shell surface 2014 is provided with a sealing cover 24. The sealing cover 24 is arranged on the periphery of the first fan cavity 2013, the second fan cavity 2023 and the connecting passage 215 and is sealed and connected to the first shell surface 2014. The connecting passage 215 connects the space located on the second shell surface 2015 with the ventilation cavity. In other achievable ways, three air ducts, four air ducts or more air ducts can also be arranged in the air duct shell 21. The structural form of the air duct assembly 2 is similar and will not be described here. In practical applications, the number of air ducts can be flexibly designed based on the performance requirements, processing difficulty and production cost of the cabinet air conditioner indoor unit.

[0065] According to an exemplary embodiment, Figure 5-Figure 13 As shown, this embodiment proposes a cabinet air conditioner indoor unit, which includes a shell 1 and any air duct assembly 2 proposed in the above embodiments. An upper air inlet 12 and an upper air outlet 11 are provided at the upper portion of the shell 1, and a lower air inlet 14 and a lower air outlet 13 are provided at the lower portion of the shell 1. Air inlet grilles are provided at the upper air inlet 12 and the lower air inlet 14, respectively, and wind guide plates are provided at the upper air inlet 11 and the lower air inlet 13, respectively. This embodiment does not specifically limit the arrangement positions of the upper air inlet 11, the upper air inlet 12, the lower air inlet 13 and the lower air inlet 14, as long as the upper air inlet 12 and the upper air outlet 11 are arranged at the upper portion of the shell 1, and the lower air inlet 14 and the lower air outlet 13 are arranged at the lower portion of the shell 1, they are all within the protection scope of the present invention.

[0066] In one embodiment, if Figure 6As shown, the housing 1 includes a top cover component 1c, an air inlet component 1a, a panel component 1b, a base component 1d, a left side plate 1f and a right side plate 1g, and the sides of the top cover component 1c, the air inlet component 1a, the panel component 1b, the base component 1d, the left side plate 1f and the right side plate 1g are connected in pairs, and the two ends of the air inlet component 1a, the panel component 1b, the left side plate 1f and the right side plate 1g in the height direction are respectively connected to the top cover component 1c and the base component 1d. The top cover component 1c, the air inlet component 1a, the panel component 1b, the base component 1d, the left side plate 1f and the right side plate 1g are enclosed to form a chamber. Preferably, the upper air inlet 11 and the upper air inlet 12 are located on the upper side of the air inlet component 1a. The lower air vent 13 is located at the lower side of the panel component 1b, and the lower air inlet 14 is located at the lower side of the air inlet component 1a. The upper air inlet 12 and the lower air inlet 14 assist the air intake, and increase the air intake area when the upper air vent 11 and the lower air inlet 13 are switched between air inlet and outlet, solving the problem of small air volume and high noise of the cabinet air conditioner indoor unit. At the same time, the upper air inlet 12 and the lower air inlet 14 are set at a position that the user cannot see, ensuring the integrity of the front and back appearance of the air conditioner, and improving the aesthetics of the cabinet air conditioner indoor unit. At the same time, it also solves the problem that the air inlet of the conventional air conditioner is easily blocked when it is set at the back, reduces the installation space of the air conditioner, and reduces the requirements for installation conditions.

[0067] like Figure 6 , Figure 8-Figure 13 As shown, the air duct assembly 2 is arranged in the shell 1, and a shell channel 15 is formed between the air duct assembly 2 and the shell 1. All upper air ducts are connected to the upper air port 11, and the upper air duct is connected to the shell channel 15 when the upper wind shielding component 22 opens the upper air guide port 213. All lower air ducts are connected to the lower air port 13, and the lower air duct is connected to the shell channel 15 when the lower wind shielding component 23 opens the lower air guide port 214. The upper air inlet 12 and the lower air inlet 14 are both connected to the shell channel 15. The lower air duct can be directly connected to the lower air port 13 or indirectly connected. In one example, as shown in FIG. Figure 6 , Figure 8 , Fig.10 and Fig.12 As shown, the cabinet air conditioner indoor unit further includes an upper ventilation frame 3 and a lower ventilation frame 4. The upper ventilation frame 3 connects the upper air outlet 11 with all the upper air ducts, and the lower ventilation frame 4 connects the lower air outlet 13 with all the lower air ducts.

[0068] like Figure 6 , Figure 8-Figure 13 As shown, the heat exchanger assembly 7 is disposed in the shell channel 15, and is used to perform heat exchange on the airflow passing through the shell channel 15. The airflow after heat exchange by the heat exchanger assembly 7 is sucked into the fan chamber through the fan. Figure 7As shown, the heat exchange component is a plate heat exchange component, and the heat exchange component includes an upper heat exchange section 71 and a lower heat exchange section 72 which are arranged opposite to each other, and the upper heat exchange section 71 is connected to the lower heat exchange section 72. The upper heat exchange section 71 is inclined from top to bottom in a direction away from the air duct assembly 2, and the lower heat exchange section 72 is inclined from top to bottom in a direction close to the air duct assembly 2. The installation angle of the heat exchange surface of the upper heat exchange section 71 and the heat exchange surface of the lower heat exchange section 72 is 90° to 180° to increase the heat exchange area. Of course, the installation angle of the heat exchange surface of the upper heat exchange section 71 and the heat exchange surface of the lower heat exchange section 72 can also be 180°.

[0069] In a preferred embodiment, Figure 6 , Figure 8-Figure 13 As shown, a first air duct 201 and a second air duct 202 are provided in the air duct shell 21, the first fan cavity 2013 is located at the upper part of the second fan cavity 2023, a first fan 5 is provided in the first fan cavity 2013, and a second fan 6 is provided in the second fan cavity 2023. The upper heat exchange section 71 is arranged opposite to the air inlet end of the first fan 5, and the lower heat exchange section 72 is arranged opposite to the air inlet end of the second fan 6. At this time, the airflow entering the shell channel 15 through the upper air inlet 12 and the upper air guide port 213 can be sucked into the first fan cavity 2013 through the first fan 5 after heat exchange through the upper heat exchange section 71, and the airflow entering the shell channel 15 through the lower air inlet 14 and the lower air guide port 214 can be sucked into the second fan cavity 2023 through the second fan 6 after heat exchange through the lower heat exchange section 72.

[0070] In some embodiments, Figure 1-Figure 2 , Figure 6 , Fig. 9 , Fig.11 and Fig.13 As shown, the first shell surface 2014 of the air duct shell 21 is provided with a sealing cover 24, and the heat exchanger assembly 7 is arranged close to the second shell surface 2015 of the air duct shell 21. The first shell surface 2014 and the second shell surface 2015 are arranged opposite to each other to reduce the thickness of the cabinet air conditioner indoor unit and reduce the indoor space occupied by the cabinet air conditioner indoor unit.

[0071] It should be noted that in order to ensure that the airflow entering the shell channel 15 from the upper air inlet 12, the upper air guide 213, the lower air inlet 14 and the lower air guide 214 is first heat exchanged by the heat exchanger assembly 7 before being sucked into the fan cavity by the fan, the first air guide port and the second air guide port are opened on both sides of the width direction of the air duct shell 21, the first shell surface 2014 and the second shell surface 2015 are located on both sides of the thickness direction of the air duct shell 21, and the heat exchanger assembly 7 is sealed and connected to the second shell surface 2015.

[0072] In a preferred embodiment, the cabinet air conditioner indoor unit also includes an upper axial flow fan and a lower axial flow fan. The upper axial flow fan is arranged in the shell 1 and is opposite to the upper air inlet 12. The lower axial flow fan is arranged in the shell 1 and is opposite to the lower air inlet 14 to improve the air intake volume and air intake efficiency of the upper air inlet 12 and the lower air inlet 14.

[0073] The air inlet and outlet positions of the cabinet air-conditioning indoor unit of the present embodiment vary with the different air outlet modes. For example, in cooling mode, the lower air outlet 13 is switched to the air inlet, realizing lower air inlet and upper air outlet; in heating mode, the upper air outlet 11 is switched to the air inlet, realizing upper air inlet and lower air outlet. The cabinet air-conditioning indoor unit of the present embodiment has a single upper air outlet mode, a single lower air outlet mode, and a simultaneous upper and lower air outlet mode. When the cabinet air-conditioning indoor unit is in the single upper air outlet mode, all upper wind shielding components 22 close the corresponding upper air guide ports 213 while connecting the corresponding upper air ducts with the fan cavity, and all lower wind shielding components 23 open the corresponding lower air guide ports 214 while blocking the connection between the corresponding lower air ducts and the fan cavity;

[0074] When the indoor unit of the cabinet air conditioner is in a single down air outlet mode, all upper wind shield components 22 open the corresponding upper air duct 213 while blocking the connection between the corresponding upper air duct and the fan cavity, and all lower wind shield components 23 close the corresponding lower air duct 214 while connecting the corresponding lower air duct with the fan cavity; when the indoor unit of the cabinet air conditioner is in a simultaneous up and down air outlet mode, all upper wind shield components 22 close the corresponding upper air duct 213 while connecting the corresponding upper air duct with the fan cavity, and all lower wind shield components 23 close the corresponding lower air duct 214 while connecting the corresponding lower air duct with the fan cavity.

[0075] Specifically, when the cabinet air conditioner indoor unit is in the single upper air outlet mode, all upper wind shielding components 22 will close the corresponding upper air guide port 213, and all upper air ducts will be connected with the passage of the corresponding fan cavity, all lower wind shielding components 23 will open the corresponding lower air guide port 214, and all lower air ducts will be disconnected from the passage of the corresponding fan cavity. When the first fan 5 and the second fan 6 are turned on at the same time, a part of the indoor air enters the lower ventilation frame 4 from the lower air port 13, and enters the multiple lower air ducts from the lower ventilation frame 4 respectively, and then The wind enters the shell channel 15 from the lower air guide port 214 corresponding to the lower air duct, and the other part of the wind enters the shell channel 15 from the upper air inlet 12 and the lower air inlet 14 respectively. After the wind in the shell channel 15 passes through the indoor heat exchanger assembly 7, a part of it is sucked into the corresponding fan cavity by the air inlet ends of multiple fans located on the second shell surface 2015, and the other part of the wind passes through the connecting channel 215 on the air duct shell 21 and is sucked into the corresponding fan cavity by the air inlet ends of multiple fans located on the first shell surface 2014. The airflow entering the fan cavity is blown into the upper ventilation frame 3 from the corresponding upper air duct under the action of the fan, and is blown out from the upper air port 11 through the upper ventilation frame 3. The airflow path is referenced as follows: Figure 8 and Fig. 9 In the direction indicated by the arrow, this air outlet method is suitable for cooling mode.

[0076] When the cabinet air conditioner indoor unit is in single down-air outlet mode, all upper wind shielding components 22 will open the corresponding upper air guide port 213, and all upper air ducts will be disconnected from the passage of the corresponding fan cavity, all lower wind shielding components 23 will close the corresponding lower air guide port 214, and all lower air ducts will be connected to the passage of the corresponding fan cavity. When the first fan 5 and the second fan 6 are turned on at the same time, a part of the indoor air enters the upper ventilation frame 3 from the upper air port 11, and enters the multiple upper air ducts respectively from the upper ventilation frame 3, and then is The upper air guide port 213 corresponding to the upper air duct enters the shell channel 15, and the other part of the wind enters the shell channel 15 from the upper air inlet 12 and the lower air inlet 14 respectively. After the wind in the shell channel 15 passes through the indoor heat exchanger assembly 7, a part of it is sucked into the corresponding fan cavity by the air inlet ends of multiple fans located on the second shell surface 2015, and the other part of the wind passes through the connecting channel 215 on the air duct shell 21 and is sucked into the corresponding fan cavity by the air inlet ends of multiple fans located on the first shell surface 2014. The airflow entering the fan cavity is blown into the lower ventilation frame 4 from the corresponding lower air duct under the action of the fan, and is blown out from the lower air port 13 through the lower ventilation frame 4. The airflow path is referenced as follows: Fig.10 and Fig.11 In the direction indicated by the arrow, this air outlet method is suitable for heating mode.

[0077] When the indoor unit of the cabinet air conditioner is in the upper and lower simultaneous air outlet mode, all upper wind shield components 22 will close the corresponding upper air guide port 213, and all upper air ducts will be connected with the passage of the corresponding fan cavity, all lower wind shield components 23 will close the corresponding lower air guide port 214, and all lower air ducts will be connected with the passage of the corresponding fan cavity, and when the first fan 5 and the second fan 6 are turned on at the same time, the wind enters the shell channel 15 from the upper air inlet 12 and the lower air inlet 14 respectively, and after the wind in the shell channel 15 passes through the indoor heat exchanger assembly 7, a part of it is sucked into the corresponding fan cavity by the air inlet end of multiple fans located on the second shell surface 2015, and the other part of the wind passes through the connecting channel 215 on the air duct shell 21 and is sucked into the corresponding fan cavity by the air inlet end of multiple fans located on the first shell surface 2014. The airflow entering the fan cavity is blown into the upper ventilation frame 3 and the lower ventilation frame 4 through the corresponding upper and lower ducts under the action of the fan, and is blown out through the upper ventilation frame 3 and the lower ventilation frame 4 through the upper air outlet 11 and the lower air outlet 13 respectively. The airflow path is referenced Fig.12 and Fig.13 The direction indicated by the arrow, this air outlet mode is suitable for rapid cooling or heating conditions.

[0078] In other feasible methods, in the single upper air outlet, single lower air outlet and simultaneous upper and lower air outlet modes, only part of the fans can be controlled to turn on according to the indoor ambient temperature, and the air outlet mode of the indoor unit of the cabinet air conditioner can be executed according to the user's control instructions, or it can be automatically adjusted according to the operating mode of the air conditioner and the indoor ambient temperature.

[0079] The cabinet air-conditioning indoor unit of the present embodiment also includes a controller, which is configured to: obtain the indoor ambient temperature and the operating mode of the cabinet air-conditioning indoor unit, determine multiple temperature judgment values ​​according to the operating mode, compare the indoor ambient temperature with the multiple temperature judgment values, and control the air outlet mode of the cabinet air-conditioning indoor unit and the start-up status of multiple fans according to the comparison result.

[0080] According to an exemplary embodiment, this embodiment proposes a control method for a cabinet air conditioner indoor unit, and the control method is applied to any cabinet air conditioner indoor unit proposed in the above embodiments. Fig.14 is a control flow chart of a cabinet air conditioner indoor unit according to an exemplary embodiment. Fig.14 , the control method comprises the following steps:

[0081] S141, obtaining the indoor ambient temperature and the operation mode of the indoor unit of the cabinet air conditioner;

[0082] S142, determining a plurality of temperature determination values ​​according to the operation mode;

[0083] S143, comparing the indoor ambient temperature with a plurality of temperature determination values, and controlling the air outlet mode of the cabinet air conditioner indoor unit and the start-up status of a plurality of fans according to the comparison result.

[0084] In this embodiment, an environmental temperature sensing package is provided in the housing 1 to detect the indoor ambient temperature. The indoor ambient temperature can be detected in real time or once every set time. The indoor ambient temperature is the average value of multiple temperature detection values. The operation mode is determined according to the user's control instruction. Different operation modes correspond to different multiple temperature judgment values. The temperature judgment value can be pre-stored in the program of the air conditioner according to the test results, or it can be calculated according to the temperature set by the user. For example, in the cooling mode, the temperature set by the user is 24°C, and the temperature judgment value corresponding to the cooling mode is 23°C and 25°C; in the heating mode, the temperature set by the user is 32°C, and the temperature judgment value corresponding to the heating mode is 31°C and 33°C. After determining multiple temperature judgment values, the obtained indoor ambient temperature is compared with the multiple temperature judgment values ​​respectively, and then the air outlet mode of the cabinet air conditioner indoor unit and the start-up state of multiple fans are controlled according to the comparison results.

[0085] In some embodiments, the plurality of fan chambers of the air duct housing 21 are staggered along the height direction of the air duct housing 21. In the cooling mode, the temperature judgment value corresponding to the cooling mode is the first set temperature and the second set temperature, and the first set temperature is greater than the second set temperature. When the indoor ambient temperature is greater than the first set temperature, the indoor ambient temperature is relatively high. In order to achieve rapid cooling, the air outlet mode of the indoor unit of the cabinet air conditioner is controlled to be the upper and lower simultaneous air outlet mode, and the plurality of fans are controlled to start and run at the same time to improve the cooling efficiency.

[0086] In the case where the second set temperature is ≤ the indoor ambient temperature ≤ the first set temperature, the indoor ambient temperature enters the comfortable temperature, and the air outlet mode of the indoor unit of the cabinet air conditioner is controlled to be a single upper air outlet mode. Since the fan located at the bottom is far away from the upper air outlet 11, the contribution of the fan located at the bottom to the air volume is less than that of the fan located at the top. At this time, the fan located at the top is also controlled to start running, and the fan located at the bottom is controlled to stop running, so as to reduce energy consumption and reduce cooling capacity to avoid excessive cooling of the indoor temperature. In the case where the indoor ambient temperature is less than the second set temperature, the indoor ambient temperature is too cold, and the air outlet mode of the indoor unit of the cabinet air conditioner is controlled to be a single upper air outlet mode. Since the fan located at the bottom is far away from the upper air outlet 11, the contribution of the fan located at the bottom to the air volume is less than that of the fan located at the top. At this time, the fan located at the top is also controlled to stop running, and the fan located at the bottom is controlled to start running, so as to further reduce the operating power consumption, and at the same time avoid further reduction of the indoor ambient temperature, and improve the comfort of the indoor environment.

[0087] In the heating mode, the temperature judgment values ​​corresponding to the heating mode are the third set temperature and the fourth set temperature, and the third set temperature is less than the fourth set temperature. When the indoor ambient temperature is less than the third set temperature, the indoor ambient temperature is relatively low. In order to achieve rapid heating, the air outlet mode of the indoor unit of the cabinet air conditioner is controlled to be a simultaneous upper and lower air outlet mode, and multiple fans are controlled to start and run at the same time to improve the heating efficiency. When the third set temperature ≤ indoor ambient temperature ≤ fourth set temperature, the indoor ambient temperature enters a comfortable temperature, and the air outlet mode of the indoor unit of the cabinet air conditioner is controlled to be a single lower air outlet mode. Since the fan located at the top is far away from the downwind outlet 13, the contribution of the fan located at the top to the air volume is less than that of the fan located at the bottom. At this time, the fan located at the bottom is also controlled to start and run, and the fan located at the top is controlled to stop running to reduce energy consumption and reduce the heating amount to avoid overheating of the indoor temperature. When the indoor ambient temperature is greater than the fourth set temperature, the indoor ambient temperature is overheated, and the air outlet mode of the indoor unit of the cabinet air conditioner is controlled to be a single downward air outlet mode. Since the fan located at the upper part is far from the downwind outlet 13, the contribution of the fan located at the upper part to the air volume is smaller than that of the fan located at the lower part. At this time, the fan located at the lower part is controlled to stop running, and the fan located at the upper part is controlled to start running, so as to further reduce the operating power consumption, while avoiding further increase in the indoor ambient temperature and improving the comfort of the indoor environment.

[0088] Among them, when the cabinet air-conditioning indoor unit is in the single upper air outlet mode, all upper wind shield components 22 are controlled to close the corresponding upper air duct 213, and all lower wind shield components 23 are controlled to open the corresponding lower air duct 214; when the cabinet air-conditioning indoor unit is in the single lower air outlet mode, all upper wind shield components 22 are controlled to open the corresponding upper air duct 213, and all lower wind shield components 23 are controlled to close the corresponding lower air duct 214; when the cabinet air-conditioning indoor unit is in the upper and lower simultaneous air outlet mode, all upper wind shield components 22 are controlled to close the corresponding upper air duct 213, and all lower wind shield components 23 are controlled to close the corresponding lower air duct 214.

[0089] The control method of this embodiment is described in detail below by taking the example that the air duct assembly 2 is provided with two air ducts, wherein a first air duct 201 and a second air duct 202 which are independent of each other are provided in the air duct shell 21, a first fan 5 is provided in the fan cavity of the first air duct 201, a second fan 6 is provided in the fan cavity of the second air duct 202, and the first fan 5 is located above the second fan 6.

[0090] Reference Fig.15 As shown in the flowchart, when the cabinet air conditioner indoor unit operates in the cooling mode, when the indoor ambient temperature is greater than the first set temperature, the air outlet mode of the cabinet air conditioner indoor unit is controlled to be the upper and lower simultaneous air outlet mode, and the first fan 5 and the second fan 6 are controlled to start running, at this time, the upper air inlet 12 and the lower air inlet 14 simultaneously take in air, and the upper air outlet 11 and the lower air outlet 13 simultaneously discharge air; when the second set temperature is ≤ the indoor ambient temperature ≤ the first set temperature, the air outlet mode of the cabinet air conditioner indoor unit is controlled to be the single upper air outlet mode, the first fan 5 is controlled to start running, and the control The second fan 6 is controlled to stop running, and the lower wind shield component 23 opens the lower air guide 214 at this time, and the lower air vent 13, the upper air inlet 12 and the lower air inlet 14 take in air at the same time, and the upper air vent 11 discharges air alone; when the indoor ambient temperature is less than the second set temperature, the air outlet mode of the indoor unit of the cabinet air conditioner is controlled to be the single upper air outlet mode, the first fan 5 is controlled to stop running, and the second fan 6 is controlled to start running, and the lower wind shield component 23 opens the lower air guide 214 at this time, and the lower air vent 13, the upper air inlet 12 and the lower air inlet 14 take in air at the same time, and the upper air vent 11 discharges air alone.

[0091] Reference Fig.16As shown in the flowchart, when the cabinet air conditioner indoor unit is operating in the heating mode, when the indoor ambient temperature is less than the third set temperature, the air outlet mode of the cabinet air conditioner indoor unit is controlled to be the upper and lower simultaneous air outlet mode, and the first fan 5 and the second fan 6 are controlled to start running, at this time, the upper air inlet 12 and the lower air inlet 14 simultaneously take in air, and the upper air outlet 11 and the lower air outlet 13 simultaneously discharge air; when the third set temperature ≤ the indoor ambient temperature ≤ the fourth set temperature, the air outlet mode of the cabinet air conditioner indoor unit is controlled to be the single lower air outlet mode, the second fan 6 is controlled to start running, and the control The first fan 5 stops running, at this time the upper wind shield component 22 opens the upper air guide 213, the upper air vent 11, the upper air inlet 12 and the lower air inlet 14 take in air at the same time, and the lower air vent 13 discharges air alone; when the indoor ambient temperature is greater than the fourth set temperature, the air outlet mode of the indoor unit of the cabinet air conditioner is controlled to be a single lower air outlet mode, the second fan 6 is controlled to stop running, and the first fan 5 is controlled to start running, at this time the upper wind shield component 22 opens the upper air guide 213, the upper air vent 11, the upper air inlet 12 and the lower air inlet 14 take in air at the same time, and the lower air vent 13 discharges air alone.

[0092] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0093] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

Claims

1. An air duct assembly, characterized in that: The air duct assembly (2) is arranged in a housing (1) of an indoor unit of the air conditioner, and the air duct assembly (2) comprises: An air duct shell (21) is formed with the shell (1) to form a shell channel (15), the shell channel (15) being connected to the air inlet of the indoor unit of the air conditioner; the air duct shell (21) is internally divided into a plurality of air ducts, each of which comprises an upper air duct, a fan cavity and a lower air duct which are connected in sequence from top to bottom, the air duct wall of each upper air duct is provided with an upper air guide port (213), the air duct wall of each lower air duct is provided with a lower air guide port (214), the air duct shell (21) further forms a connecting channel (215), the connecting channel (215) passes through the air duct shell along the axial direction of the fan cavity; the plurality of fan cavities of the air duct shell are staggered along the height direction of the air duct shell (21), and the connecting channel (215) is located between any two adjacent fan cavities; A plurality of fans, which are arranged in the fan cavities of the plurality of air ducts in a one-to-one correspondence, and the fans are centrifugal fans; A plurality of upper wind shield components (22) and a plurality of lower wind shield components (23), wherein the plurality of upper wind shield components (22) are arranged one by one at the upper air guide ports (213) of the plurality of air ducts, and the upper wind shield components (22) are designed to block the connection between the upper air duct and the fan cavity when the upper air guide ports (213) are opened, or to connect the upper air duct with the fan cavity when the upper air guide ports (213) are closed, and the upper air duct is connected to the fan cavity when the upper wind shield component (22) opens the upper air guide ports (213). The lower wind shielding components (23) are arranged one by one at the lower air guide ports (214) of the plurality of air ducts, and the lower wind shielding components (23) are designed to block the connection between the lower air duct and the fan cavity when the lower air guide port (214) is opened, or to connect the lower air duct with the fan cavity when the lower air guide port (214) is closed, and the lower air duct is connected to the shell channel (15) when the lower wind shielding component (23) opens the lower air guide port (214).

2. The air duct assembly according to claim 1, characterized in that: The multiple fan cavities of the air duct shell are staggered along the width direction and / or thickness direction of the air duct shell (21).

3. The air duct assembly according to claim 1, characterized in that: The air duct wall comprises a first shell surface (2014) and a second shell surface (2015) located on both sides of the fan cavity in the axial direction. The air duct assembly (2) further comprises a sealing cover (24). The sealing cover (24) is arranged on the first shell surface (2014) and is covered on the outer periphery of the connecting channel (215) and the plurality of fans. The sealing cover (24) and the first shell surface (2014) are combined to form a ventilation cavity. The connecting channel (215) connects the ventilation cavity with a space located on one side of the second shell surface (2015).

4. A cabinet-type air conditioner indoor unit, characterized in that: The cabinet type air conditioner indoor unit comprises: A shell (1), the air inlet comprising an upper air inlet (12) and a lower air inlet (14), the upper portion of the shell (1) being provided with an upper air inlet (11), and the lower portion of the shell (1) being provided with a lower air inlet (13); The air duct assembly according to any one of claims 1 to 3, wherein the upper air duct is connected to the upper air port (11), the lower air duct is connected to the lower air port (13), and the upper air inlet (12) and the lower air inlet (14) are both connected to the shell channel (15); A heat exchanger assembly (7) is arranged in the shell channel (15) and is used to perform heat exchange on the airflow flowing through the shell channel (15); the airflow after heat exchange in the heat exchanger assembly (7) is sucked into the fan chamber through the fan.

5. The cabinet type air conditioner indoor unit according to claim 4, characterized in that: The cabinet air conditioner indoor unit has a single upper air outlet mode, a single lower air outlet mode and a upper and lower air outlet mode at the same time; When the cabinet air conditioner indoor unit is in the single upper air outlet mode, all upper wind shielding components (22) close the corresponding upper air guide ports (213) while allowing the corresponding upper air duct to communicate with the fan cavity, and all lower wind shielding components (23) open the corresponding lower air guide ports (214) while blocking the communication between the corresponding lower air duct and the fan cavity; When the cabinet air conditioner indoor unit is in the single downward air outlet mode, all upper wind shielding components (22) open the corresponding upper air guide ports (213) and block the connection between the corresponding upper air duct and the fan cavity, and all lower wind shielding components (23) close the corresponding lower air guide ports (214) and connect the corresponding lower air duct to the fan cavity; When the cabinet air conditioner indoor unit is in the upper and lower simultaneous air outlet mode, all upper wind shielding components (22) close the corresponding upper air guide outlet (213) while allowing the corresponding upper air duct to communicate with the fan cavity, and all lower wind shielding components (23) close the corresponding lower air guide outlet (214) while allowing the corresponding lower air duct to communicate with the fan cavity.

6. The cabinet type air conditioner indoor unit according to claim 4, characterized in that: The first shell surface (2014) of the air duct shell (21) is provided with a sealing cover (24), the heat exchanger assembly (7) is arranged close to the second shell surface (2015) of the air duct shell (21), and the first shell surface (2014) and the second shell surface (2015) are arranged opposite to each other.

7. A control method for a cabinet air conditioner indoor unit, characterized in that: The control method is applied to the cabinet air conditioner indoor unit according to any one of claims 4 to 6, and the control method comprises: Obtain the indoor ambient temperature and the operating mode of the indoor unit of the cabinet air conditioner; determining a plurality of temperature determination values ​​according to the operation mode; The indoor environment temperature is compared with the multiple temperature judgment values, and the air outlet mode of the cabinet air conditioner indoor unit and the start-up status of the multiple fans are controlled according to the comparison result.

8. The control method of the indoor unit of the cabinet air conditioner according to claim 7, characterized in that: The plurality of fan cavities of the air duct shell (21) are staggered in the height direction of the air duct shell (21); when the cabinet air conditioner indoor unit operates in a cooling mode, the temperature judgment value corresponding to the cooling mode is a first set temperature and a second set temperature, the first set temperature is greater than the second set temperature, the indoor environment temperature is compared with the plurality of temperature judgment values, and the air outlet mode of the cabinet air conditioner indoor unit and the start-up state of the plurality of fans are controlled according to the comparison result, comprising: When the indoor ambient temperature is greater than the first set temperature, the air outlet mode of the cabinet air conditioner indoor unit is controlled to be a top and bottom simultaneous air outlet mode, and the multiple fans are controlled to start running; When the second set temperature is less than or equal to the indoor ambient temperature less than or equal to the first set temperature, the air outlet mode of the indoor unit of the cabinet air conditioner is controlled to be a single upper air outlet mode, the fan located at the upper part is controlled to start running, and the fan located at the lower part is controlled to stop running; When the indoor ambient temperature is less than the second set temperature, the air outlet mode of the indoor unit of the cabinet air conditioner is controlled to be a single upper air outlet mode, the fan located at the upper part is controlled to stop running, and the fan located at the lower part is controlled to start running.

9. The control method of the indoor unit of the cabinet air conditioner according to claim 8, characterized in that: When the cabinet air conditioner indoor unit operates in a heating mode, the temperature judgment values ​​corresponding to the heating mode are a third set temperature and a fourth set temperature, the third set temperature is less than the fourth set temperature, the indoor environment temperature is compared with the multiple temperature judgment values, and the air outlet mode of the cabinet air conditioner indoor unit and the start-up state of the multiple fans are controlled according to the comparison result, including: When the indoor ambient temperature is less than the third set temperature, the air outlet mode of the cabinet air conditioner indoor unit is controlled to be a top and bottom simultaneous air outlet mode, and the multiple fans are controlled to start running; When the third set temperature is less than or equal to the indoor ambient temperature and less than or equal to the fourth set temperature, the air outlet mode of the indoor unit of the cabinet air conditioner is controlled to be a single bottom air outlet mode, the fan located at the bottom is controlled to start running, and the fan located at the top is controlled to stop running; When the indoor ambient temperature is greater than the fourth set temperature, the air outlet mode of the indoor unit of the cabinet air conditioner is controlled to be a single bottom air outlet mode, the fan located at the bottom is controlled to stop running, and the fan located at the top is controlled to start running.

Images