Air conditioner self-cleaning control method with humidifying function and cabinet type air conditioner

Abstract

The invention provides an air conditioner self-cleaning control method with a humidifying function and a cabinet type air conditioner, and belongs to the field of air conditioners. Through the arrangement of the flow path control structure, the air conditioner can achieve a single lower air outlet heating mode of upper air inlet and lower air outlet, a single upper air outlet refrigeration mode of lower air inlet and upper air outlet and a self-cleaning mode of airflow circulation in the air conditioner, and meanwhile, under the self-cleaning mode, the air flow can be automatically cleaned, so that the air flow can be automatically cleaned. Air flow in the air conditioner is frosted and then defrosted in the air duct by controlling the temperature of the indoor heat exchanger, and therefore the self-cleaning effect on the air duct in the air conditioner and the fan blades is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular to a self-cleaning control method for an air conditioner with a humidification function and a cabinet air conditioner. Background Art

[0002] As people become more aware of health, when the air conditioner is in cooling operation, condensation water is easily generated inside the air conditioner due to the low air outlet temperature. At the same time, the internal pressure is lower than the external pressure due to the operation of the fan. After long-term operation, the dust on the surface of the air duct and fan mixes with the condensation water, the surface becomes seriously dirty, easily breeding bacteria, and the air produces an odor, which reduces the cleanliness of the air in the entire room and makes the human body prone to colds and other symptoms.

[0003] Existing air conditioning treatment methods mostly focus on cleaning and sterilizing indoor heat exchangers, but are unable to clean the air ducts and fan blades, resulting in poor actual sterilization effects of the air conditioner. At the same time, during cleaning, high-temperature hot air will be blown out, causing a strong sense of discomfort to the indoor temperature, resulting in poor actual use effects. Summary of the invention

[0004] In order to overcome the problems in the related art of the air conditioner that the air duct and fan blades cannot be cleaned, and the problem that high-temperature hot air is blown into the room during cleaning, resulting in a poor user experience, the embodiments of the present invention propose a self-cleaning control method for an air conditioner with a humidification function and a cabinet air conditioner. The method can realize a single down-air outlet heating mode with air inlet at the upper air port and air outlet at the lower air port through the setting of a flow path control structure, and can also realize a single up-air outlet cooling mode with air inlet at the lower air port and air outlet at the upper air port, and can also realize a self-cleaning mode in which the air flow circulates inside the air conditioner. At the same time, in the self-cleaning mode, the temperature of the heat exchanger is controlled to make the air flow inside the air conditioner frost and then defrost in the air duct, thereby achieving a self-cleaning effect on the air duct and fan blades inside the air conditioner.

[0005] In a first aspect of an embodiment of the present invention, a self-cleaning control method for an air conditioner with a humidification function is provided, wherein the air conditioner is provided with an upper air outlet, a lower air outlet, and an air duct connected to the upper air outlet and the lower air outlet, and an indoor heat exchanger, a flow path control mechanism, an upper fan, a lower fan, and a humidification device for providing humidification for the air duct are arranged on the air duct, wherein:

[0006] The upper fans and lower fans are arranged correspondingly to the upper air outlets and lower air outlets;

[0007] The air conditioner is provided with a cooling mode, a heating mode and a self-cleaning mode, and the flow path control mechanism is used to control the air duct to form different flow paths under different operation modes of the air conditioner;

[0008] When the air conditioner is in cooling mode, the flow path control mechanism controls the air duct to form a first flow path connecting the upper air outlet and the lower air outlet inside the air conditioner, and at least one of the upper fan and the lower fan provides power for the air flow to flow from the lower air outlet to the upper air outlet in the first flow path;

[0009] When the air conditioner is in heating mode, the flow path control mechanism controls the air duct to form a second flow path connecting the upper air outlet and the lower air outlet inside the air conditioner, and at least one of the upper fan and the lower fan provides power for the air flow to flow from the upper air outlet to the lower air outlet in the second flow path;

[0010] When the air conditioner is in the self-cleaning mode, the flow path control mechanism controls the air duct to form a third flow path that is connected end to end inside the air conditioner, and the upper fan or the lower fan is used to provide power for the airflow to circulate in the third flow path;

[0011] When the air conditioner runs in self-cleaning mode, the self-cleaning control method includes:

[0012] The flow path control mechanism is controlled to make the air duct form a closed-loop third flow path inside the air conditioner;

[0013] Make the air conditioner run in cooling mode, control one of the upper fan and the lower fan to be turned on and the other to be turned off, turn on the humidification device to provide humidification to the air flow in the air duct, and control the speed of the fan to change the temperature of the indoor heat exchanger;

[0014] By changing the temperature of the indoor heat exchanger, the air flow in the duct is frosted and then melted in the duct, so as to achieve self-cleaning of the duct;

[0015] The operating state of the air conditioner includes a cooling operating state and a heating operating state.

[0016] In the above technical solution, the air flow in the air duct is frosted and then melted in the air duct by changing the temperature value of the indoor heat exchanger, so as to realize self-cleaning of the air duct, including:

[0017] When the air conditioner is running in a cooling state, the speed of the fan is reduced so that the temperature of the indoor heat exchanger reaches a third preset temperature, and when the temperature of the indoor heat exchanger reaches the third preset temperature, the humidification device is turned off, and the air conditioner is controlled to run in a heating state;

[0018] The third preset temperature is a temperature value that can cause frost on the air flow in the air duct.

[0019] In the above technical solution, when the air conditioner is running in a cooling state, reducing the speed of the fan so that the temperature of the indoor heat exchanger reaches the third preset temperature includes:

[0020] Control the fan to reduce speed in the first stage, and when the temperature of the indoor heat exchanger reaches a first preset temperature, control the fan to run at the current speed for a first preset time;

[0021] After the fan runs for a first preset time, the fan is controlled to reduce speed in the second stage, and when the temperature of the indoor heat exchanger reaches a second preset temperature, the fan is controlled to run at the current speed for a second preset time;

[0022] After the fan runs for a second preset time, the fan is controlled to perform a third stage of speed reduction, and when the temperature of the indoor heat exchanger reaches a third preset temperature, the fan is controlled to be turned off;

[0023] The first preset temperature>the second preset temperature>the third preset temperature, the first preset temperature is lower than the dew point temperature of the air in the air duct, and the second preset temperature is less than 0°.

[0024] In the above technical solution, when the indoor heat exchanger is operated in the heating state, the fan that is turned off due to meeting the third preset temperature value is controlled to be turned on again;

[0025] Obtaining the temperature value of the indoor heat exchanger, and when the temperature value of the indoor heat exchanger reaches a fourth preset temperature, controlling the fan that is turned on again to turn off;

[0026] The fourth preset temperature is greater than 50°.

[0027] In the above technical solution, when the indoor heat exchanger is operating in the heating state, controlling the fan that has been turned off to turn on again includes:

[0028] Control the closed fan to start running at the lowest wind speed;

[0029] The minimum windshield speed of the fan is between 300r / min and 350r / min.

[0030] In the above technical solution, the self-cleaning control method further includes:

[0031] When the air conditioner continuously operates in the cooling mode for a third preset time or the cumulative time when the air conditioner operates in the cooling mode reaches a fourth preset time, controlling the air conditioner to execute the self-cleaning mode;

[0032] The control method also includes:

[0033] When the air conditioner is in self-cleaning mode, close the air vents that connect the air conditioner to the external environment.

[0034] In the above technical solution, the air conditioner is operated in a cooling state, one of the upper fan and the lower fan is controlled to be turned on and the other is turned off, the humidification device is turned on to provide humidification to the air flow in the air duct, and the speed of the fan is controlled to change the temperature value of the indoor heat exchanger; by changing the temperature value of the indoor heat exchanger, the air flow in the air duct is frosted and then melted in the air duct to achieve self-cleaning of the air duct, including:

[0035] First, the upper fan is turned on, and the speed of the upper fan is controlled to reduce the temperature of the indoor heat exchanger tube wall to a first preset temperature, which is lower than the dew point temperature of the air in the air duct;

[0036] Controlling the speed of the upper fan to make the temperature of the indoor heat exchanger tube wall continue to drop to a second preset temperature to cause frost to form on the inner wall of the air duct;

[0037] When it is determined that the conditions for ending frosting are met, the upper fan is stopped and the humidification equipment is turned off, so that the air conditioner exits the cooling state;

[0038] Control the air conditioner to switch to heating mode, control the upper fan to rotate to melt the frost layer in the air duct and make the high-temperature air flow flow toward the lower air outlet to complete the high-temperature self-cleaning and sterilization of the upper part of the air duct;

[0039] Keep the heating running, turn off the upper fan, control the rotation of the lower fan to melt the frost layer in the air duct and drive the high-temperature airflow to flow toward the upper air outlet to complete the high-temperature self-cleaning and sterilization of the lower half of the air duct.

[0040] A second aspect of an embodiment of the present invention provides a cabinet air conditioner, the air conditioner is provided with an upper air outlet, a lower air outlet, and an air duct connected with the upper air outlet and the lower air outlet, and an indoor heat exchanger, a flow path control mechanism, an upper fan, a lower fan and a humidifying device for providing humidification for the air duct arranged on the air duct, wherein:

[0041] The upper fans and lower fans are arranged correspondingly to the upper air outlets and lower air outlets;

[0042] The air conditioner is provided with a cooling mode, a heating mode and a self-cleaning mode, and the flow path control mechanism is used to control the air duct to form different flow paths under different operation modes of the air conditioner;

[0043] When the air conditioner is in cooling mode, the flow path control mechanism controls the air duct to form a first flow path connecting the upper air outlet and the lower air outlet inside the air conditioner, and at least one of the upper fan and the lower fan provides power for the air flow to flow from the lower air outlet to the upper air outlet in the first flow path;

[0044] When the air conditioner is in heating mode, the flow path control mechanism controls the air duct to form a second flow path connecting the upper air outlet and the lower air outlet inside the air conditioner, and at least one of the upper fan and the lower fan provides power for the air flow to flow from the upper air outlet to the lower air outlet in the second flow path;

[0045] When the air conditioner is in the self-cleaning mode, the flow path control mechanism controls the air duct to form a third flow path that is connected end to end inside the air conditioner, and the upper fan or the lower fan is used to provide power for the airflow to circulate in the third flow path;

[0046] When the air conditioner executes the self-cleaning mode, the air conditioner uses the above-mentioned air conditioner self-cleaning control method.

[0047] In the above technical solution, the air conditioner comprises:

[0048] A casing, wherein an upper air outlet is provided at the upper portion of the casing, and a lower air outlet is provided at the lower portion of the casing;

[0049] An air duct component is arranged inside the casing, a shell cavity is defined between the outside of the air duct component and the casing, and an upper air supply duct, an upper fan air duct, an intermediate air duct, a lower fan air duct and a lower air supply duct are arranged in sequence from top to bottom and fluidly communicated with each other. The upper part of the upper air supply duct is connected to the upper air outlet, and an upper return air outlet connected to the shell cavity is provided on the air duct wall of the upper air supply duct. The lower part of the lower air supply duct is connected to the lower air outlet, and a lower return air outlet connected to the shell cavity is provided on the air duct wall of the lower air supply duct;

[0050] The fan comprises an upper fan arranged in the upper fan air duct and a lower fan arranged in the lower fan air duct, the upper fan having an upper fan air inlet connected to the shell cavity, and the lower fan having a lower fan air inlet connected to the shell cavity;

[0051] An indoor heat exchanger, the indoor heat exchanger is arranged in the housing cavity and opposite to the fan air inlet in the air duct component;

[0052] The flow path control mechanism includes an upper flow path control mechanism and a lower flow path control mechanism. The upper flow path control mechanism can cut off the connection between the upper air supply duct and the upper fan outlet while opening the upper return air outlet, and connect the upper air supply duct and the upper fan outlet while closing the upper return air outlet. The lower flow path control mechanism can cut off the connection between the lower air supply duct and the lower fan outlet while opening the lower return air outlet, and connect the lower air supply duct and the lower fan outlet while closing the lower return air outlet.

[0053] The air conditioner has a single upper air outlet cooling mode, a single lower air outlet heating mode, and a self-cleaning mode;

[0054] When the air conditioner is operating in the upper air outlet cooling mode, the upper fan and the lower fan are controlled to be turned on, the upper flow path control mechanism connects the upper supply duct and the upper fan outlet end while closing the upper return air outlet, and the lower flow path control mechanism disconnects the connection between the lower supply duct and the lower fan outlet end while opening the lower return air outlet, the airflow outside the casing enters the casing cavity through the lower air outlet and the lower return air outlet in turn, a part of the airflow entering the casing cavity is sucked in by the lower fan, and the other part of the airflow is sucked in by the upper fan, wherein the airflow sucked in by the lower fan passes through the middle air duct and the upper supply air duct in turn and is discharged from the casing outside from the upper air outlet, and the airflow sucked in by the upper fan passes through the upper supply air duct and is discharged from the casing outside from the upper air outlet, so that a first flow path with air intake from the lower air outlet and air outlet from the upper air outlet can be formed inside the air conditioner when the air conditioner is operating in the upper air outlet cooling mode;

[0055] When the air conditioner is operating in a single downward air outlet heating mode, the upper fan and the lower fan are controlled to be turned on, the upper flow path control mechanism closes the connection between the upper supply duct and the upper fan outlet end while opening the upper return air outlet, and the lower flow path control mechanism connects the lower supply duct and the lower fan outlet end while closing the lower return air outlet, the airflow outside the casing enters the casing cavity through the upper air outlet and the upper return air outlet in turn, a part of the airflow entering the casing cavity is sucked in by the upper fan, and the other part of the airflow is sucked in by the lower fan, wherein the airflow sucked in by the upper fan passes through the middle air duct and the lower supply air duct in turn and is discharged from the casing outside from the lower air outlet, and the airflow sucked in by the lower fan passes through the lower supply air duct and is discharged from the casing outside from the lower air outlet, so that when the air conditioner is operating in a single downward air outlet heating mode, a second flow path with air entering from the upper air outlet and air exiting from the lower air outlet can be formed inside the air conditioner;

[0056] When the air conditioner is running in the self-cleaning mode, one of the upper fan and the lower fan is controlled to be turned on and the other is controlled to be turned off. The upper flow path control mechanism opens the upper return air outlet and cuts off the connection between the upper air supply duct and the upper fan outlet. The lower flow path control mechanism opens the lower return air outlet and cuts off the connection between the lower air supply duct and the lower fan outlet. The airflow in the shell cavity can be sucked in by the turned-on fan and enter the unturned fan through the middle air duct, and return to the shell cavity through the air inlet of the unturned fan, so that a third flow path for circulating airflow is formed inside the air conditioner when the air conditioner is running in the self-cleaning mode.

[0057] The air conditioner also includes a humidifying device, which is used to humidify the air flow in the air duct when the air conditioner is operating in a single upper air outlet cooling mode, a single lower air outlet heating mode, or a self-cleaning mode.

[0058] In the above technical solution, the air duct component includes an air duct component A side and an air duct component B side opposite to each other in the axial direction of the fan, and a vent penetrating the air duct component A side and the air duct component B side is provided on the air duct component, and the vent is connected to the housing cavity;

[0059] The humidifying device is arranged in the ventilation opening.

[0060] In the above technical solution, the upper air supply duct has an upper air supply duct side A close to the upper fan side and an upper air supply duct side B close to the upper air outlet side, and the upper air supply duct includes a first upper air supply duct and a second upper air supply duct separated at the upper air supply duct side A and connected at the upper air supply duct side B;

[0061] The lower air supply duct has a lower air supply duct side A close to the lower fan side and a lower air supply duct side B close to the lower air outlet side, and the lower air supply duct includes a first lower air supply duct and a second lower air supply duct separated at the lower air supply duct side A and connected at the lower air supply duct side B;

[0062] The upper flow path control mechanism comprises an upper baffle mechanism rotatably arranged at a connecting position between the upper fan outlet end and the first upper air supply duct, and an upper volute tongue mechanism that can slide circumferentially around a preset rotating axis of the upper fan, the upper baffle mechanism has a first upper rotating position and a second upper rotating position when rotating, and the upper volute tongue mechanism has a first upper sliding position and a second upper sliding position when sliding, wherein when the upper baffle mechanism is in the first upper rotating position, the upper return air outlet is opened and the connection between the upper fan outlet end and the first upper air supply duct is blocked, and when the upper baffle mechanism is in the second upper rotating position, the upper return air outlet is closed and the upper fan outlet end and the first upper air supply duct are connected, when the upper volute tongue mechanism is in the first upper sliding position, the upper fan outlet end is connected with the middle air duct while blocking the connection between the upper fan outlet end and the second upper air supply duct, and when the upper volute tongue mechanism is in the second upper sliding position, the upper fan outlet end is connected with the second upper air supply duct while blocking the connection between the upper fan outlet end and the middle air duct;

[0063] The cam mechanism is configured to move the fan forward toward the side of the second lower air duct, and the cam mechanism has the first lower rotation position and the second lower rotation position when rotating. The cam mechanism has the first lower sliding position and the second lower sliding position when sliding. When the cam mechanism is in the first lower rotation position, the lower return air outlet is opened and the connection between the lower fan outlet and the first lower air supply duct is blocked. When the cam mechanism is in the second lower rotation position, the lower return air outlet is closed and the connection between the lower fan outlet and the first lower air supply duct is connected. When the cam mechanism is in the first lower sliding position, the lower fan outlet remains connected with the middle air duct while blocking the connection between the lower fan outlet and the second lower air supply duct. When the cam mechanism is in the second sliding position, the lower fan outlet is connected with the second lower air supply duct while blocking the connection between the lower fan outlet and the middle air duct.

[0064] In the above technical solution, the indoor heat exchanger includes an upper heat exchange portion opposite to the axial air inlet of the upper fan, and a lower heat exchange portion opposite to the axial air inlet of the lower fan;

[0065] The upper heat exchange part and the lower heat exchange part form a V-shaped heat exchange element with the recess facing one side of the air duct component.

[0066] In the above technical solution, the upper air vent and the lower air vent can be controlled to be opened or closed;

[0067] When the air conditioner is running in self-cleaning mode, the upper and lower air vents are controlled to be closed.

[0068] In the above technical solution, the upper part of the casing is provided with an upper auxiliary air inlet which can be controlled to be opened or closed, and the lower part of the casing is provided with a lower auxiliary air inlet which can be controlled to be opened or closed;

[0069] When the air conditioner is running in self-cleaning mode, the upper air vents, lower air vents, upper auxiliary air inlet and lower auxiliary air inlet are controlled to close.

[0070] In the above technical solution, both the upper fan and the lower fan are centrifugal fans, and the upper fan and the lower fan have opposite rotation directions.

[0071] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0072] In the embodiment of the present invention, multiple air duct structures of the cabinet air conditioner are set, and the connectivity between the multiple air ducts is controlled in combination with a flow control mechanism. On the one hand, the up and down reversible air supply effect of the cabinet air conditioner can be achieved through the control of the flow control mechanism. On the other hand, the self-cleaning effect of the air duct and the fan can be achieved through the setting of the flow control mechanism. On the other hand, when achieving the self-cleaning effect of the air duct and the fan, the influence of the high-temperature airflow on the indoor temperature and cleanliness during the self-cleaning process can be reduced, thereby improving the comfort and cleanliness of the room. BRIEF DESCRIPTION OF THE DRAWINGS

[0073] 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.

[0074] Figure 1 The cross-sectional structure of the air conditioner in the embodiment of the cabinet air conditioner of the present invention is shown in FIG. Figure 1 ;

[0075] Figure 2 The cross-sectional structure of the air conditioner in the embodiment of the cabinet air conditioner of the present invention is shown in FIG. Figure 2 ;

[0076] Figure 3 The cross-sectional structure of the air conditioner in the embodiment of the cabinet air conditioner of the present invention is shown in FIG. Figure 1 , the upper fan in the figure is turned on and the lower fan is turned off;

[0077] Figure 4 The cross-sectional structure of the air conditioner in the embodiment of the cabinet air conditioner of the present invention is shown in FIG. Figure 2 , the upper fan in the figure is turned on and the lower fan is turned off;

[0078] Figure 5 The cross-sectional structure of the air conditioner in the embodiment of the cabinet air conditioner of the present invention is shown in FIG. Figure 1 , the upper fan in the figure is turned off and the lower fan is turned on;

[0079] Figure 6 The cross-sectional structure of the air conditioner in the embodiment of the cabinet air conditioner of the present invention is shown in FIG. Figure 2 , the upper fan in the figure is turned off and the lower fan is turned on;

[0080] Figure 7 The control flow of the cabinet air conditioner of the present invention when executing the self-cleaning mode Figure 1 ;

[0081] Figure 8 The control flow of the cabinet air conditioner of the present invention when executing the self-cleaning mode Figure 2 .

[0082] in:

[0083] 1- housing; 11- upper air outlet; 12- lower air outlet; 13- upper auxiliary air inlet; 14- lower auxiliary air inlet;

[0084] 2-air duct component; 21-upper air supply duct; 211-first upper air supply duct; 212-second upper air supply duct; 213-upper return air outlet; 22-upper fan duct; 23-middle duct; 24-lower fan duct; 25-lower air supply duct; 251-first lower air supply duct; 252-second lower air supply duct; 253-lower return air outlet; 26-ventilation outlet;

[0085] 3-housing cavity;

[0086] 4-upper fan; 41-upper fan air inlet;

[0087] 5-lower fan; 51-lower fan air inlet;

[0088] 6-upper flow path control mechanism; 61-upper baffle mechanism; 62-upper volute mechanism;

[0089] 7-lower flow path control mechanism; 71-lower baffle mechanism; 72-lower volute mechanism;

[0090] 8-Humidification equipment;

[0091] 9-indoor heat exchanger; 91-upper heat exchange part; 92-lower heat exchange part. DETAILED DESCRIPTION

[0092] 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.

[0093] At present, existing air conditioners have the problem of being unable to clean the air ducts and blades of the air conditioners, and when cleaning, high-temperature hot air will be blown into the room, resulting in a poor user experience. The embodiment of the present invention proposes a cabinet air conditioner and a self-cleaning control method for the cabinet air conditioner. By setting multiple air duct structures of the cabinet air conditioner and combining a flow control mechanism to control the connectivity between multiple air ducts, on the one hand, the control of the flow control mechanism can achieve the up and down reversible air supply effect of the cabinet air conditioner, on the other hand, the setting of the flow control mechanism can also achieve the self-cleaning effect of the air duct and fan, and on the other hand, when achieving the self-cleaning effect of the air duct and fan, it can also reduce the impact of the high-temperature airflow on the indoor temperature and cleanliness during the self-cleaning process, thereby improving the comfort and cleanliness of the room.

[0094] The following is combined with Figure 1 -Attached Figure 8 The technical solution of this embodiment is elaborated in detail. In the absence of conflict, the following implementation methods and embodiments can be combined with each other.

[0095] Example

[0096] like Figure 1-Figure 8 As shown, in a first aspect of an embodiment of the present invention, a self-cleaning control method for an air conditioner with a humidification function is proposed, wherein the air conditioner is provided with an upper air outlet, a lower air outlet, and an air duct connected with the upper air outlet and the lower air outlet, and an indoor heat exchanger, a flow path control mechanism, an upper fan, a lower fan, and a humidification device for providing humidification for the air duct are arranged on the air duct, wherein:

[0097] The upper fans and lower fans are arranged correspondingly to the upper air outlets and lower air outlets;

[0098] The air conditioner is provided with a cooling mode, a heating mode and a self-cleaning mode, and the flow path control mechanism is used to control the air duct to form different flow paths under different operation modes of the air conditioner;

[0099] When the air conditioner is in cooling mode, the flow path control mechanism controls the air duct to form a first flow path connecting the upper air outlet and the lower air outlet inside the air conditioner, and at least one of the upper fan and the lower fan provides power for the air flow to flow from the lower air outlet to the upper air outlet in the first flow path;

[0100] When the air conditioner is in heating mode, the flow path control mechanism controls the air duct to form a second flow path connecting the upper air outlet and the lower air outlet inside the air conditioner, and at least one of the upper fan and the lower fan provides power for the air flow to flow from the upper air outlet to the lower air outlet in the second flow path;

[0101] When the air conditioner is in the self-cleaning mode, the flow path control mechanism controls the air duct to form a third flow path that is connected end to end inside the air conditioner, and the upper fan or the lower fan is used to provide power for the airflow to circulate in the third flow path;

[0102] When the air conditioner runs in self-cleaning mode, the self-cleaning control method includes:

[0103] The flow path control mechanism is controlled to make the air duct form a closed-loop third flow path inside the air conditioner;

[0104] Make the air conditioner run in cooling mode, control one of the upper fan and the lower fan to be turned on and the other to be turned off, turn on the humidification device to provide humidification to the air flow in the air duct, and control the speed of the fan to change the temperature of the indoor heat exchanger;

[0105] By changing the temperature of the indoor heat exchanger, the air flow in the duct is frosted and then melted in the duct, so as to achieve self-cleaning of the duct;

[0106] The operating state of the air conditioner includes a cooling operating state and a heating operating state.

[0107] In the embodiment of the present invention, multiple air duct structures of the cabinet air conditioner are set, and the connectivity between the multiple air ducts is controlled in combination with a flow control mechanism. On the one hand, the up and down reversible air supply effect of the cabinet air conditioner can be achieved through the control of the flow control mechanism. On the other hand, the self-cleaning effect of the air duct and the fan can be achieved through the setting of the flow control mechanism. On the other hand, when achieving the self-cleaning effect of the air duct and the fan, the influence of the high-temperature airflow on the indoor temperature and cleanliness during the self-cleaning process can be reduced, thereby improving the comfort and cleanliness of the room.

[0108] It is worth noting that the cooling operation and heating operation mentioned above are explained from the perspective of the cooling and heating systems, while the cooling mode and heating mode are explained from the perspective of user needs. Specifically, when the cooling operation and heating operation are in operation, only the temperature of the heat exchanger is changed, while when the cooling mode and heating mode are in operation, not only the temperature of the heat exchanger is changed, but also the flow path of the airflow in the air conditioner is changed.

[0109] Specifically, the airflow in the air duct is frosted and then melted in the air duct by changing the temperature value of the indoor heat exchanger, so as to realize self-cleaning of the air duct, including:

[0110] When the air conditioner is running in a cooling state, the speed of the fan is reduced so that the temperature of the indoor heat exchanger 9 reaches a third preset temperature, and when the temperature of the indoor heat exchanger 9 reaches the third preset temperature, the humidification device is turned off, and the air conditioner is controlled to run in a heating state;

[0111] The third preset temperature is a temperature value that can cause frost on the air flow in the air duct.

[0112] In the embodiment of the present invention, by frosting the air flow in the air duct, the dust in the air duct can be fully combined with the double layer, and then the condensed water combined with the dust can be quickly flowed away through the defrosting operation, thereby achieving a self-cleaning effect of the air duct.

[0113] Further, when the air conditioner is running in a cooling state, the speed of the fan is reduced so that the temperature of the indoor heat exchanger 9 reaches a third preset temperature, including:

[0114] Control the fan to perform a first stage of speed reduction, and when the temperature of the indoor heat exchanger 9 reaches a first preset temperature, control the fan to run at the current speed for a first preset time;

[0115] After the fan runs for a first preset time, the fan is controlled to reduce speed in the second stage, and when the temperature of the indoor heat exchanger 9 reaches a second preset temperature, the fan is controlled to run at the current speed for a second preset time;

[0116] After the fan runs for a second preset time, the fan is controlled to reduce speed in the third stage, and when the temperature of the indoor heat exchanger 9 reaches a third preset temperature, the fan is controlled to be turned off;

[0117] The first preset temperature>the second preset temperature>the third preset temperature, the first preset temperature is lower than the dew point temperature of the air in the air duct, and the second preset temperature is less than 0°.

[0118] It is worth noting that the first preset temperature and the second preset temperature are for condensing air moisture into frost, and when the third preset temperature is reached, the frost layer is heated to melt it quickly so that dust and water can flow away quickly.

[0119] In any of the above embodiments, when the indoor heat exchanger 9 operates in the heating state, the fan that is turned off due to meeting the third preset temperature value is controlled to be turned on again;

[0120] Obtaining the temperature value of the indoor heat exchanger 9, and when the temperature value of the indoor heat exchanger 9 reaches a fourth preset temperature, controlling the fan that is turned on again to be turned off;

[0121] The fourth preset temperature is greater than 50°.

[0122] Furthermore, when the indoor heat exchanger 9 is in the heating state, controlling the fan that has been turned off to turn on again includes:

[0123] Control the closed fan to start running at the lowest wind speed;

[0124] The minimum windshield speed of the fan is between 300r / min and 350r / min.

[0125] In any of the above embodiments, the self-cleaning control method further comprises:

[0126] When the air conditioner continuously operates in the cooling mode for a third preset time or the cumulative time when the air conditioner operates in the cooling mode reaches a fourth preset time, controlling the air conditioner to execute the self-cleaning mode;

[0127] The control method also includes:

[0128] When the air conditioner is in self-cleaning mode, close the air vents that connect the air conditioner to the external environment.

[0129] It is worth noting that the third preset time length and the fourth preset time length may be the same or different, and their specific time length values ​​may be specifically set according to the specific parameter configuration of the model.

[0130] In any of the above embodiments, the air conditioner is operated in a cooling state, one of the upper fan and the lower fan is controlled to be turned on and the other is turned off, the humidification device is turned on to provide humidification to the airflow in the air duct, and the speed of the fan is controlled to change the temperature of the indoor heat exchanger; by changing the temperature of the indoor heat exchanger, the airflow in the air duct is frosted and then melted in the air duct to achieve self-cleaning of the air duct, including:

[0131] First, the upper fan is turned on, and the speed of the upper fan is controlled to reduce the temperature of the indoor heat exchanger tube wall to a first preset temperature, which is lower than the dew point temperature of the air in the air duct;

[0132] Controlling the speed of the upper fan to make the temperature of the indoor heat exchanger tube wall continue to drop to a second preset temperature to cause frost to form on the inner wall of the air duct;

[0133] When it is determined that the conditions for ending frosting are met, the upper fan is stopped and the humidification equipment is turned off, so that the air conditioner exits the cooling state;

[0134] Control the air conditioner to switch to heating mode, control the upper fan to rotate to melt the frost layer in the air duct and make the high-temperature air flow flow toward the lower air outlet to complete the high-temperature self-cleaning and sterilization of the upper part of the air duct;

[0135] Keep the heating running, turn off the upper fan, control the rotation of the lower fan to melt the frost layer in the air duct and drive the high-temperature airflow to flow toward the upper air outlet to complete the high-temperature self-cleaning and sterilization of the lower half of the air duct.

[0136] It is worth noting that the above-mentioned "termination condition of frosting" may be the thickness of the frost layer, the refrigeration operation time, or the tube wall temperature of the indoor heat exchanger.

[0137] In order to more clearly understand how the air conditioner in this embodiment is cleaned, the following Figure 8 Detailed explanation of the air conditioner's self-cleaning mode:

[0138] like Figure 8 As shown:

[0139] ①. When the air conditioner runs in cooling mode for a long time or the accumulated cooling operation reaches the maximum time, the conditions for entering self-cleaning are met and the self-cleaning function is executed after shutdown.

[0140] ②. When the self-cleaning function starts to be executed, the upper flow path control mechanism 6 opens the upper return air port 213 and at the same time shuts off the connection between the upper supply air duct 21 and the upper fan outlet end. The lower flow path control mechanism 7 opens the lower return air port 253 and at the same time shuts off the connection between the lower supply air duct 25 and the lower fan outlet end. The airflow in the shell cavity 3 can be sucked in by the turned-on fan and enter the unturned fan through the middle air duct 23, and return to the shell cavity 3 through the air inlet of the unturned fan, so as to realize the circulation of airflow inside the air conditioner. At this time, airflow circulation is formed inside the air conditioner.

[0141] ③. In cooling operation of the air conditioner, the lower fan 5 remains in the closed state, the upper fan 4 runs at a speed to the set wind speed, and the humidifier atomizer is turned on to humidify the air duct. The temperature of the indoor heat exchanger 9 is controlled to reach the first preset temperature by reducing the fan speed, so that the temperature inside the air duct is lower than the dew point temperature of the air, condensation water is generated inside the air duct, and dust is mixed with the condensed water and the atomized water vapor.

[0142] ④. By reducing the speed of the upper fan, the indoor heat exchanger temperature drops to the second preset temperature, and the atomized water vapor and condensed water begin to frost on the inner wall of the air duct. When the indoor heat exchanger temperature reaches the third preset temperature, when the frost thickness is thick, the upper fan stops, the humidifier atomizer is turned off, and the cooling mode is exited.

[0143] ⑤. Switch the air conditioner to heating mode, turn on the upper fan and run it to the lowest wind speed, quickly increase the temperature inside the air duct, accelerate the melting of the frost layer inside the air duct, and quickly peel off the dust and frost layer from the surface of the air duct and fan.

[0144] ⑥. Control the speed of the upper fan to keep the temperature of the indoor heat exchanger at the fourth preset temperature. The operation of the upper fan drives the high-temperature airflow to flow, and the lower fan duct 24 and the lower fan 5 are sterilized by high-temperature self-cleaning.

[0145] ⑦. After the high-temperature self-cleaning of the lower fan 5 is completed, the lower fan 5 is turned on and the upper fan 4 is turned off to achieve high-temperature self-cleaning of the upper fan duct 22 and the upper fan 4, thereby achieving high-temperature self-cleaning of the entire duct component.

[0146] ⑧After completion, the air conditioner shuts down, exits the self-cleaning function, and enters standby mode.

[0147] It should be noted that, preferably, the first preset temperature is above 0°C, the second preset temperature and the third preset temperature are both below 0°C, and the second preset temperature is greater than the third preset temperature. The fourth preset temperature is a high temperature stage temperature control, and the temperature is controlled at above 50°C.

[0148] The second aspect of the embodiment of the present invention further provides a cabinet air conditioner, the air conditioner is provided with an upper air outlet, a lower air outlet and an air duct connected with the upper air outlet and the lower air outlet, and an indoor heat exchanger, a flow path control mechanism, an upper fan, a lower fan and a humidifying device for providing humidification for the air duct arranged on the air duct, wherein:

[0149] The upper fans and lower fans are arranged correspondingly to the upper air outlets and lower air outlets;

[0150] The air conditioner is provided with a cooling mode, a heating mode and a self-cleaning mode, and the flow path control mechanism is used to control the air duct to form different flow paths under different operation modes of the air conditioner;

[0151] When the air conditioner is in cooling mode, the flow path control mechanism controls the air duct to form a first flow path connecting the upper air outlet and the lower air outlet inside the air conditioner, and at least one of the upper fan and the lower fan provides power for the air flow to flow from the lower air outlet to the upper air outlet in the first flow path;

[0152] When the air conditioner is in heating mode, the flow path control mechanism controls the air duct to form a second flow path connecting the upper air outlet and the lower air outlet inside the air conditioner, and at least one of the upper fan and the lower fan provides power for the air flow to flow from the upper air outlet to the lower air outlet in the second flow path;

[0153] When the air conditioner is in the self-cleaning mode, the flow path control mechanism controls the air duct to form a third flow path that is connected end to end inside the air conditioner, and the upper fan or the lower fan is used to provide power for the airflow to circulate in the third flow path;

[0154] When the air conditioner executes the self-cleaning mode, the air conditioner adopts the air conditioner self-cleaning control method mentioned in the first aspect of the embodiment of the present invention.

[0155] Furthermore, the cabinet air conditioner also includes:

[0156] The casing 1 is provided with an upper air outlet 11 at the upper part of the casing 1, and a lower air outlet 12 at the lower part of the casing 1; it should be noted that the upper part and the lower part mentioned in this embodiment are only a relative relationship, which does not mean that the upper part is the top and the lower part is the bottom. In some alternative embodiments, the upper air outlet close to the upper part or the lower air outlet close to the lower part can be understood as the upper air outlet is provided at the upper part and the lower air outlet is provided at the lower part;

[0157] The air duct component 2 is arranged inside the housing 1. Figure 1-Figure 6 As shown, preferably, the air duct component 2 is extended along the height direction of the casing 1 and is arranged inside the casing 1, wherein a shell cavity 3 is defined between the outside of the air duct component 2 and the casing 1, and an upper air supply duct 21, an upper fan air duct 22, an intermediate air duct 23, a lower fan air duct 24 and a lower air supply duct 25 are formed inside, which are arranged in sequence from top to bottom and fluidly communicated with each other, wherein the upper part of the upper air supply duct 21 is connected to the upper air outlet 11, and an upper return air outlet 213 connected to the shell cavity 3 is provided on the air duct wall of the upper air supply duct 21, and the lower part of the lower air supply duct 25 is connected to the lower air outlet 12, and a lower return air outlet 253 connected to the shell cavity 3 is provided on the air duct wall of the lower air supply duct 25;

[0158] The fan comprises an upper fan 4 disposed in the upper fan air duct 22 and a lower fan 5 disposed in the lower fan air duct 24, the upper fan 4 having an upper fan air inlet 41 connected to the shell cavity, and the lower fan 5 having a lower fan air inlet 51 connected to the shell cavity 3;

[0159] An indoor heat exchanger 9, which is disposed in the housing cavity 3 and is opposite to the fan air inlet in the air duct component 2;

[0160] The flow path control mechanism includes an upper flow path control mechanism 6 and a lower flow path control mechanism 7. The upper flow path control mechanism 6 can cut off the connection between the upper air supply duct 21 and the upper fan outlet while opening the upper return air outlet 213, and connect the upper air supply duct 21 and the upper fan outlet while closing the upper return air outlet 213. The lower flow path control mechanism 7 can cut off the connection between the lower air supply duct 25 and the lower fan outlet while opening the lower return air outlet 253, and connect the lower air supply duct 25 and the lower fan outlet while closing the lower return air outlet 253.

[0161] The air conditioner has a single upper air outlet cooling mode, a single lower air outlet heating mode, and a self-cleaning mode;

[0162] When the air conditioner is operating in the upper air outlet cooling mode, the upper fan 4 and the lower fan 5 are controlled to be turned on, the upper flow path control mechanism 6 connects the upper supply duct 21 and the upper fan outlet end while closing the upper return air outlet 213, and the lower flow path control mechanism 7 disconnects the connection between the lower supply duct 25 and the lower fan outlet end while opening the lower return air outlet 253. At this time, the airflow outside the casing 1 enters the shell cavity 3 through the lower air outlet 12 and the lower return air outlet 253 in turn, a part of the airflow entering the shell cavity 3 is sucked in by the lower fan 5, and the other part of the airflow is sucked in by the upper fan 4, wherein the airflow sucked in by the lower fan 5 passes through the middle air duct 23 and the upper supply air duct 21 in turn and is discharged from the outside of the casing 1 from the upper air outlet 11, and the airflow sucked in by the upper fan 4 passes through the upper supply air duct 21 and is discharged from the outside of the casing 1 from the upper air outlet 11, so that when the air conditioner is operating in the upper air outlet cooling mode, a first flow path with air entering from the lower air outlet and air outlet from the upper air outlet can be formed inside the air conditioner;

[0163] When the air conditioner is running in the single downward air outlet heating mode, the upper fan 4 and the lower fan 5 are controlled to be turned on, the upper flow path control mechanism 6 opens the upper return air port 213 and shuts off the connection between the upper supply air duct 21 and the upper fan outlet end, and the lower flow path control mechanism 7 closes the lower return air port 253 and connects the lower supply air duct 25 and the lower fan outlet end, and the external airflow of the casing 1 enters the shell cavity 3 through the upper air port 11 and the upper return air port 213 in turn, and a part of the airflow entering the shell cavity 3 is sucked in by the upper fan 4, and the other part of the airflow is sucked in by the lower fan 5, wherein the airflow sucked in by the upper fan 4 passes through the middle air duct 23 and the lower supply air duct 25 in turn and is discharged from the outside of the casing 1 from the lower air port 12, and the airflow sucked in by the lower fan 5 passes through the lower supply air duct 25 and is discharged from the outside of the casing 1 from the lower air port 12, so that when the air conditioner is running in the single downward air outlet heating mode, a second flow path with air intake from the upper air port and air outlet from the lower air port can be formed inside the air conditioner;

[0164] When the air conditioner is in the self-cleaning mode, one of the upper fan 4 and the lower fan 5 is controlled to be turned on and the other is controlled to be turned off. The upper flow path control mechanism 6 opens the upper return air port 213 and cuts off the connection between the upper air supply duct 21 and the air outlet of the upper fan. The lower flow path control mechanism 7 opens the lower return air port 253 and cuts off the connection between the lower air supply duct 25 and the air outlet of the lower fan. The airflow in the shell cavity 3 can be sucked in by the turned-on fan and enter the unturned fan through the middle air duct 23, and return to the shell cavity 3 through the air inlet of the unturned fan, so that a third flow path for circulating airflow is formed inside the air conditioner when the air conditioner is in the self-cleaning mode.

[0165] The air conditioner further comprises a humidifying device, and the humidifying device 8 is used to humidify the air flow in the air duct when the air conditioner operates in an upper air outlet cooling mode, a lower air outlet heating mode or a self-cleaning mode.

[0166] That is, in the embodiment of the present invention, multiple air duct flow paths of the cabinet air conditioner are set, and the connectivity between the multiple air duct flow paths is controlled in combination with a flow path control mechanism. On the one hand, the up and down reversible air supply effect of the cabinet air conditioner can be achieved through the control of the flow path control mechanism. On the other hand, the self-cleaning effect of the air duct and the fan can also be achieved through the setting of the flow path control mechanism. On the other hand, since the air flow circulates inside the air conditioner during self-cleaning, the air conditioner can avoid high-temperature or low-temperature air flow from being discharged into the room during the self-cleaning process while achieving the self-cleaning effect, thereby avoiding the impact on the indoor temperature and cleanliness during the self-cleaning process, thereby improving the room comfort and cleanliness.

[0167] When the air conditioner is running in the self-cleaning mode, the humidification device 8 is controlled to be turned on by the control module, so as to clean the air duct and the fan by combining the humidified air flow and the temperature change of the air flow inside the air conditioner.

[0168] Preferably, the above-mentioned humidifying device 8 is a humidifying atomizer. When the humidifying atomizer is started, the atomized water vapor can directly enter the air duct along the air flow, and can be sent out with the supply air flow. While meeting the basic cooling, heating and humidification needs, the inside of the air duct can be humidified, thereby achieving the effect of water washing the inside of the air duct.

[0169] Further, such as Figure 4 and Figure 6 As shown, the air duct component 2 includes an air duct component A side and an air duct component B side opposite to each other in the axial direction of the fan, and a vent 26 penetrating the air duct component A side and the air duct component B side is provided on the air duct component, and the vent 26 is connected to the housing cavity 3;

[0170] The humidifying device 8 is arranged in the ventilation opening 26 .

[0171] Since the shell cavity 3 is connected to the air inlet of the fan, and the shell cavity 3 is also connected to the vent 26, and the humidification device 8 is arranged in the vent 26, when the fan is started, the air flow can pass through the vent 26, and when passing through the vent 26, it is mixed with the atomized water vapor and sucked into the fan together, so as to achieve the effect of humidifying the inside of the air duct.

[0172] In the above technical solution, if Figure 2 , Figure 4 and Figure 6 As shown, the upper air supply duct 21 has an upper air supply duct A side close to the upper fan 4 and an upper air supply duct B side close to the upper air outlet 11, and the upper air supply duct 21 includes a first upper air supply duct 211 and a second upper air supply duct 212 which are separated at the upper air supply duct A side and connected at the upper air supply duct B side;

[0173] The lower air supply duct 25 has a lower air supply duct A side close to the lower fan 5 and a lower air supply duct B side close to the lower air outlet. The lower air supply duct 25 includes a first lower air supply duct 251 and a second lower air supply duct 252 which are separated at the lower air supply duct A side and connected at the lower air supply duct B side.

[0174] The upper flow path control mechanism 6 includes an upper baffle mechanism 61 rotatably arranged at a position where the upper fan outlet and the first upper air supply duct 211 are connected, and an upper volute mechanism 62 capable of circumferentially sliding around a preset rotation axis of the upper fan 4. The upper baffle mechanism 61 has a first upper rotation position and a second upper rotation position when rotating, and the upper volute mechanism 62 has a first upper sliding position and a second upper sliding position when sliding, wherein when the upper baffle mechanism 61 is located at the first upper rotation position, the upper return air outlet 213 is opened while blocking the upper fan outlet and the first upper air supply duct. When the upper baffle mechanism 61 is located at the second upper rotation position, the upper return air port 213 is closed and connected to the upper fan outlet and the first upper air supply duct 211; when the upper volute mechanism 62 is located at the first upper sliding position, the upper fan outlet is connected to the middle air duct 23 while blocking the connection between the upper fan outlet and the second upper air supply duct 212; when the upper volute mechanism 62 is located at the second upper sliding position, the upper fan outlet is connected to the second upper air supply duct 212 while blocking the connection between the upper fan outlet and the middle air duct 23;

[0175] The lower flow path control mechanism 7 includes a lower baffle mechanism 71 rotatably arranged at a position where the lower fan outlet and the first lower air supply duct 251 are connected, and a lower volute mechanism 72 capable of circumferentially sliding around a preset rotation axis of the lower fan 5. The lower baffle mechanism 71 has a first lower rotation position and a second lower rotation position when rotating, and the lower volute mechanism 72 has a first lower sliding position and a second lower sliding position when sliding. When the lower baffle mechanism 71 is located at the first lower rotation position, the lower return air outlet 253 is opened while blocking the lower fan outlet and the first lower air supply duct. The connection of the air supply duct 251, when the lower baffle mechanism 71 is located at the second lower rotating position, the lower return air port 253 is closed and the lower fan outlet end and the first lower air supply duct 251 are connected; when the lower volute mechanism 72 is located at the first lower sliding position, the lower fan outlet end maintains connection with the middle air duct 23 while blocking the connection between the lower fan outlet end and the second lower air supply duct 252; when the lower volute mechanism 72 is located at the second sliding position, the lower fan outlet end maintains connection with the second lower air supply duct 252 while blocking the connection between the lower fan outlet end and the middle air duct 23.

[0176] Specific:

[0177] When the air conditioner operates in the single upper air outlet cooling mode, the lower baffle mechanism 71 in the lower flow path control mechanism 7 rotates to the first lower rotation position, and the lower volute mechanism 72 slides to the first lower sliding position. At this time, the lower baffle mechanism 71 opens the lower return air outlet 253 and cuts off the connection between the lower fan outlet and the first lower air supply duct 251. The lower volute mechanism 72 cuts off the connection between the lower fan outlet and the second lower air supply duct 252 and connects the lower fan outlet and the middle air duct 23. At the same time, the upper baffle mechanism 61 in the upper flow path control mechanism 6 rotates to the second upper rotation position, and the upper volute mechanism 62 slides to the second upper sliding position. At this time, the upper baffle mechanism 61 closes the upper return air outlet 21 3, while connecting the upper fan outlet end and the first upper air supply duct 211, the upper volute mechanism 62 blocks the connection between the upper fan outlet end and the middle air duct 23 while connecting the upper fan outlet end and the second upper air supply duct 212. At this time, the external airflow of the casing 1 enters the shell cavity 3 through the lower air port 12 and the lower return air port 253 in turn, a part of the airflow entering the shell cavity 3 is sucked into the lower fan 5, and the other part of the airflow is sucked into the upper fan 4, wherein the airflow sucked into the lower fan 5 passes through the middle air duct 23 and the first upper air supply duct 211 in turn and is discharged from the outside of the casing 1 from the upper air port 11, and the airflow sucked into the upper fan 4 passes through the second upper air supply duct 212 and is discharged from the outside of the casing 1 from the upper air port 11.

[0178] When the air conditioner operates in a single downward air outlet heating mode, the upper baffle mechanism 61 in the upper flow path control mechanism 6 rotates to a first upper rotating position, and the upper volute mechanism 62 slides to a first upper sliding position. At this time, the upper baffle mechanism 61 blocks the connection between the upper fan outlet and the first upper air supply duct 211 while opening the upper return air outlet 213. The upper volute mechanism 62 blocks the connection between the upper fan outlet and the second upper air supply duct 212 while connecting the upper fan outlet and the middle air duct 23. At the same time, the lower baffle mechanism 71 in the lower flow path control mechanism 7 rotates to a second lower rotating position, and the lower volute mechanism 72 slides to a second lower sliding position. At this time, the lower baffle mechanism 71 connects the lower fan outlet and the first lower return air outlet 253 while closing the lower return air outlet 253. Air supply duct 251, the lower volute mechanism 72 blocks the connection between the lower fan outlet end and the middle air duct 23 while connecting the lower fan outlet end with the second lower air supply duct 252. At this time, the external airflow of the casing 1 enters the shell cavity 3 through the upper air port 11 and the upper return air port 213 in turn, and a part of the airflow entering the shell cavity 3 is sucked into the upper fan 4, and the other part of the airflow is sucked into the lower fan 5. The airflow sucked into the upper fan 4 passes through the middle air duct 23 and the first lower air supply duct 251 in turn and is discharged from the outside of the casing 1 from the lower air port 12, and the airflow sucked into the lower fan 5 passes through the second lower air supply duct 252 and is discharged from the outside of the casing 1 from the lower air port 12, so that the air conditioner is in the single lower air outlet heating mode. The air intake is from the upper air port 11 and the air outlet is from the lower air port 12.

[0179] When the air conditioner is running in the self-cleaning mode, the upper baffle mechanism 61 in the upper flow path control mechanism 6 rotates to the first upper rotation position, and the upper volute mechanism 62 slides to the first upper sliding position. At this time, the upper baffle mechanism 61 opens the upper return air outlet 213 and blocks the connection between the upper fan outlet and the first upper air supply duct 211. The upper volute mechanism 62 blocks the connection between the upper fan outlet and the second upper air supply duct 212 while connecting the upper fan outlet and the middle air duct 23. At the same time, the lower flow path control mechanism 6 The lower baffle mechanism 71 in the control mechanism 7 rotates to the first lower rotation position, and the lower volute mechanism 72 slides to the first lower sliding position. At this time, the lower baffle mechanism 71 opens the lower return air port 253 and cuts off the connection between the lower fan outlet and the first lower air supply duct 251. The lower volute mechanism 72 cuts off the connection between the lower fan outlet and the second lower air supply duct 252 and connects the lower fan outlet with the middle air duct 23. At this time, the outlets of the upper fan 4 and the lower fan 5 are connected through the middle air duct 23. Since only one of the upper fan 4 and the lower fan 5 is turned on in the self-cleaning mode, the airflow in the housing cavity 3 can be sucked in by the turned-on fan and enter the unturned fan through the middle air duct 23, and return to the housing cavity 3 through the air inlet of the unturned fan, so that the airflow circulates inside the air conditioner.

[0180] Specifically, Figure 3 and Figure 4 As shown, when the upper fan 4 is turned on and the lower fan 5 is turned off, the airflow flows out from the air outlet of the upper fan 4, flows to the lower fan 5 through the middle air duct 23, and is discharged into the shell cavity 3 through the lower fan air inlet 51 of the lower fan 5, and is sucked in by the upper fan 4 again, thereby realizing the circulation of the airflow.

[0181] Specifically, Figure 5 and Figure 6 As shown, when the upper fan 4 is turned off and the lower fan 5 is turned on, the airflow flows out from the air outlet of the lower fan 5, flows to the upper fan 4 through the intermediate air duct 23, and is discharged into the shell cavity 3 through the axial air inlet of the upper fan 4, and is sucked in by the lower fan 5 again, thereby realizing the circulation of the airflow.

[0182] Of course, if Figure 1-Figure 6 As shown, the cabinet air conditioner provided in the embodiment of the present invention further includes an indoor heat exchanger 9 , which is arranged in the shell cavity 3 and opposite to the fan air inlet in the air duct component 2 .

[0183] When the air flow enters the shell cavity 3, it can exchange heat with the indoor heat exchanger 9. The air flow after heat exchange is sucked into the turned-on fan and then discharged through the upper air outlet 11 or discharged through the lower air outlet 12 or circulated inside the air conditioner. The specific flow path of the air flow is determined according to the operating mode of the air conditioner.

[0184] Further, such as Figure 3 and Figure 5 As shown, the indoor heat exchanger 9 includes an upper heat exchange portion 91 opposite to the axial air inlet of the upper fan 4, and a lower heat exchange portion 92 opposite to the axial air inlet of the lower fan 5;

[0185] The upper heat exchange portion 91 and the lower heat exchange portion 92 form a V-shaped heat exchange element with the recess facing the side of the air duct component 2 .

[0186] In the embodiment of the present invention, the indoor heat exchanger 9 is set as a V-shaped indoor heat exchanger 9, which can improve the heat exchange effect of the airflow. It should be noted that since the air conditioner in the embodiment of the present invention is a cabinet air conditioner, when the airflow flows in the air conditioner, the airflow flows from top to bottom or from bottom to top. Therefore, by setting the indoor heat exchanger 9 as a V-shaped heat exchanger with the recess facing the side of the air duct component 2, the airflow can increase the contact area with the indoor heat exchanger 9 when flowing along the height direction of the body, thereby improving the heat exchange effect of the airflow. At the same time, the V-shaped indoor heat exchanger 9 will not cause the overall size of the air conditioner to be larger, thereby improving the heat exchange effect of the airflow on the basis of avoiding the overall size of the machine to be larger.

[0187] In any of the above embodiments, the upper air vent 11 and the lower air vent 12 can be controlled to be opened or closed;

[0188] When the air conditioner is running in the self-cleaning mode, the upper air vent 11 and the lower air vent 12 are controlled by the control module to be closed.

[0189] In the embodiment of the present invention, when the air conditioner is running in the self-cleaning mode, by closing the upper air vent 11 and the lower air vent 12, the internal air flow of the air conditioner can be further prevented from flowing into the room, thereby further reducing the impact of the high-temperature air flow on the indoor temperature and cleanliness during the sterilization and self-cleaning process, thereby improving the comfort and cleanliness of the room.

[0190] In any of the above embodiments, if Figure 1-Figure 6 As shown, the upper part of the housing 1 is provided with an upper auxiliary air inlet 13 which can be controlled to be opened or closed, and the lower part of the housing 1 is provided with a lower auxiliary air inlet 14 which can be controlled to be opened or closed;

[0191] When the air conditioner is running in the self-cleaning mode, the upper air vent 11, the lower air vent 12, the upper auxiliary air inlet 13 and the lower auxiliary air inlet 14 are controlled by the control module to be closed.

[0192] In the embodiment of the present invention, by setting the upper auxiliary air inlet 13 and the lower auxiliary air inlet 14, the air intake volume of the air conditioner when running in the cooling mode or the heating mode can be increased, thereby increasing the air outlet volume of the air conditioner when running in the cooling mode or the heating mode, thereby improving the cooling effect and the heating effect.

[0193] In any of the above embodiments, if Figure 1 , Figure 3 and Figure 5 As shown, the upper fan 4 and the lower fan 5 are both centrifugal fans, and the upper fan 4 and the lower fan 5 have opposite rotation directions. Preferably, the upper fan 4 and the lower fan 5 are single-suction centrifugal fans that inlet air from one axial side. Of course, in some alternative embodiments, the upper fan 4 and the lower fan 5 may also be double-suction centrifugal fans that inlet air from both axial sides, and the rotation directions of the upper fan 4 and the lower fan 5 may also be set to be the same, but relatively speaking, it is preferred that the upper fan 4 and the lower fan 5 have opposite rotation directions, and the air outlet effect is best.

[0194] In summary, it can be seen that in the embodiment of the present invention, multiple air duct flow paths of the cabinet air conditioner are set, and the connectivity between the multiple air duct flow paths is controlled in combination with the flow path control mechanism. On the one hand, the up and down reversible air supply effect of the cabinet air conditioner can be achieved through the control of the flow path control mechanism. On the other hand, the self-cleaning effect of the air duct and the fan can be achieved through the setting of the breakable mechanism. On the other hand, since the air flow circulates inside the air conditioner during self-cleaning, the air conditioner can avoid high-temperature or low-temperature airflow from being discharged into the room during the self-cleaning process while achieving the self-cleaning effect, thereby avoiding the impact on the indoor temperature and cleanliness during the self-cleaning process, thereby improving the room comfort and cleanliness.

[0195] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the embodiments disclosed herein. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary technical means in the art that are not disclosed in the present invention. The description and examples are to be regarded as exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0196] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A self-cleaning control method for an air conditioner with a humidification function, wherein the air conditioner is provided with an upper air outlet, a lower air outlet, and an air duct connected to the upper air outlet and the lower air outlet, and an indoor heat exchanger, a flow path control mechanism, an upper fan, a lower fan, and a humidification device for providing humidification for the air duct arranged on the air duct, wherein: The upper fans and lower fans are arranged corresponding to the upper air outlet and lower air outlet; The air conditioner is provided with a cooling mode, a heating mode and a self-cleaning mode, and the flow path control mechanism is used to control the air duct to form different flow paths under different operation modes of the air conditioner; When the air conditioner is in cooling mode, the flow path control mechanism controls the air duct to form a first flow path connecting the upper air outlet and the lower air outlet inside the air conditioner, and at least one of the upper fan and the lower fan provides power for the air flow to flow from the lower air outlet to the upper air outlet in the first flow path; When the air conditioner is in heating mode, the flow path control mechanism controls the air duct to form a second flow path connecting the upper air outlet and the lower air outlet inside the air conditioner, and at least one of the upper fan and the lower fan provides power for the air flow to flow from the upper air outlet to the lower air outlet in the second flow path; When the air conditioner is in the self-cleaning mode, the flow path control mechanism controls the air duct to form a third flow path that is connected end to end inside the air conditioner, and the upper fan or the lower fan is used to provide power for the airflow to circulate in the third flow path; The self-cleaning control method comprises: When the air conditioner is running in the self-cleaning mode, controlling the flow path control mechanism so that the air duct forms a closed-loop third flow path inside the air conditioner; The air conditioner is operated in a cooling state, one of the upper fan and the lower fan is controlled to be turned on and the other is turned off, a humidifying device is turned on to provide humidification to the air flow in the air duct, and the speed of the fan is controlled to change the temperature value of the indoor heat exchanger; By changing the temperature value of the indoor heat exchanger, the airflow in the air duct is frosted and then melted in the air duct, so as to achieve self-cleaning of the air duct; The operating state of the air conditioner includes a cooling operating state and a heating operating state.

2. The self-cleaning control method according to claim 1, characterized in that: The method of changing the temperature value of the indoor heat exchanger to cause the air flow in the air duct to frost and then melt in the air duct to achieve self-cleaning of the air duct includes: When the air conditioner is running in a cooling state, the speed of the fan is reduced so that the temperature of the indoor heat exchanger reaches a third preset temperature, and when the temperature of the indoor heat exchanger reaches the third preset temperature, the humidification device is turned off, and the air conditioner is controlled to run in a heating state; The third preset temperature is a temperature value that can cause frost on the air flow in the air duct.

3. The self-cleaning control method according to claim 2, characterized in that: When the air conditioner is running in a cooling state, reducing the speed of the fan so that the temperature of the indoor heat exchanger reaches a third preset temperature comprises: Control the fan to reduce speed in the first stage, and when the temperature of the indoor heat exchanger reaches a first preset temperature, control the fan to run at the current speed for a first preset time; After the fan runs for a first preset time, the fan is controlled to reduce speed in the second stage, and when the temperature of the indoor heat exchanger reaches a second preset temperature, the fan is controlled to run at the current speed for a second preset time; After the fan runs for a second preset time, the fan is controlled to reduce speed in the third stage, and when the temperature of the indoor heat exchanger reaches the third preset temperature, the fan is controlled to be turned off; The first preset temperature>the second preset temperature>the third preset temperature, the first preset temperature is lower than the dew point temperature of the air in the air duct, and the second preset temperature is less than 0°.

4. The self-cleaning control method according to claim 3, characterized in that: When the indoor heat exchanger is operated in a heating state, the fan that is turned off due to meeting a third preset temperature value is controlled to be turned on again; Acquire the temperature value of the indoor heat exchanger, and when the temperature value of the indoor heat exchanger reaches a fourth preset temperature, control the fan that is turned on again to turn off; The fourth preset temperature is greater than 50°.

5. The self-cleaning control method according to claim 3 or 4, characterized in that: When the indoor heat exchanger is operating in a heating state, controlling the fan that has been turned off to turn on again comprises: Control the closed fan to start running at the lowest wind speed; The minimum windshield speed of the fan is between 300r / min and 350r / min.

6. The self-cleaning control method according to claim 1, characterized in that: The self-cleaning control method further comprises: When the air conditioner continuously operates in the cooling mode for a third preset time or the cumulative time when the air conditioner operates in the cooling mode reaches a fourth preset time, controlling the air conditioner to execute the self-cleaning mode; The control method further comprises: When the air conditioner executes the self-cleaning mode, the air vents connecting the air conditioner to the external environment are closed.

7. The self-cleaning control method according to claim 1, characterized in that: The air conditioner is operated in a cooling state, one of the upper fan and the lower fan is controlled to be turned on and the other is turned off, a humidifying device is turned on to provide humidification to the air flow in the air duct, and the speed of the fan is controlled to change the temperature of the indoor heat exchanger; By changing the temperature value of the indoor heat exchanger, the airflow in the air duct is frosted and then melted in the air duct, so as to realize self-cleaning of the air duct, including: First, the upper fan is turned on, and the speed of the upper fan is controlled to reduce the temperature of the indoor heat exchanger tube wall to a first preset temperature, wherein the first preset temperature is lower than the dew point temperature of the air in the air duct; Controlling the speed of the upper fan to make the temperature of the indoor heat exchanger tube wall continue to drop to a second preset temperature to cause frost to form on the inner wall of the air duct; When it is determined that the frosting termination condition is met, the upper fan is stopped from rotating and the humidification device is turned off, so that the air conditioner exits the cooling state; Control the air conditioner to switch to heating mode, control the upper fan to rotate to melt the frost layer in the air duct and make the high-temperature air flow flow toward the lower air outlet to complete the high-temperature self-cleaning and sterilization of the upper part of the air duct; Keep the heating running, turn off the upper fan, control the rotation of the lower fan to melt the frost layer in the air duct and drive the high-temperature airflow to flow toward the upper air outlet to complete the high-temperature self-cleaning and sterilization of the lower half of the air duct.

8. A cabinet air conditioner, characterized in that: The air conditioner is provided with an upper air inlet, a lower air inlet, and an air duct connected with the upper air inlet and the lower air inlet, and an indoor heat exchanger, a flow path control mechanism, an upper fan, a lower fan, and a humidifying device for providing humidification for the air duct arranged on the air duct, wherein: The upper fans and lower fans are arranged corresponding to the upper air outlet and lower air outlet; The air conditioner is provided with a cooling mode, a heating mode and a self-cleaning mode, and the flow path control mechanism is used to control the air duct to form different flow paths under different operation modes of the air conditioner; When the air conditioner is in cooling mode, the flow path control mechanism controls the air duct to form a first flow path connecting the upper air outlet and the lower air outlet inside the air conditioner, and at least one of the upper fan and the lower fan provides power for the air flow to flow from the lower air outlet to the upper air outlet in the first flow path; When the air conditioner is in heating mode, the flow path control mechanism controls the air duct to form a second flow path connecting the upper air outlet and the lower air outlet inside the air conditioner, and at least one of the upper fan and the lower fan provides power for the air flow to flow from the upper air outlet to the lower air outlet in the second flow path; When the air conditioner is in the self-cleaning mode, the flow path control mechanism controls the air duct to form a third flow path that is connected end to end inside the air conditioner, and the upper fan or the lower fan is used to provide power for the airflow to circulate in the third flow path; When the air conditioner executes the self-cleaning mode, the air conditioner adopts the air conditioner self-cleaning control method according to any one of claims 1 to 7.

9. The cabinet air conditioner according to claim 8, characterized in that: The air conditioner comprises: A casing, wherein the upper portion of the casing is provided with the upper air outlet, and the lower portion of the casing is provided with the lower air outlet; An air duct component, wherein the air duct component is arranged inside the casing, a shell cavity is defined between the outside of the air duct component and the casing, and an upper air supply duct, an upper fan air duct, an intermediate air duct, a lower fan air duct and a lower air supply duct are formed inside the shell, which are arranged in sequence from top to bottom and fluidly communicated with each other, the upper portion of the upper air supply duct is connected to the upper air outlet, and an upper return air outlet connected to the shell cavity is provided on the air duct wall of the upper air supply duct, the lower portion of the lower air supply duct is connected to the lower air outlet, and a lower return air outlet connected to the shell cavity is provided on the air duct wall of the lower air supply duct; A fan, the fan comprising the upper fan arranged in the upper fan air duct and the lower fan arranged in the lower fan air duct, the upper fan having an upper fan air inlet connected to the shell cavity, and the lower fan having a lower fan air inlet connected to the shell cavity; An indoor heat exchanger, the indoor heat exchanger is disposed in the housing cavity and is opposite to the fan air inlet in the air duct component; The flow path control mechanism includes an upper flow path control mechanism and a lower flow path control mechanism, wherein the upper flow path control mechanism can shut off the connection between the upper air supply duct and the upper fan outlet while opening the upper return air outlet, and connect the upper air supply duct and the upper fan outlet while closing the upper return air outlet, and the lower flow path control mechanism can shut off the connection between the lower air supply duct and the lower fan outlet while opening the lower return air outlet, and connect the lower air supply duct and the lower fan outlet while closing the lower return air outlet; The air conditioner has a single upper air outlet cooling mode, a single lower air outlet heating mode and a self-cleaning mode; When the air conditioner is operating in an upper air outlet cooling mode, the upper fan and the lower fan are controlled to be turned on, the upper flow path control mechanism connects the upper supply duct and the upper fan outlet end while closing the upper return air outlet, and the lower flow path control mechanism disconnects the connection between the lower supply duct and the lower fan outlet end while opening the lower return air outlet. The airflow outside the casing enters the casing cavity through the lower air outlet and the lower return air outlet in sequence, a part of the airflow entering the casing cavity is sucked in by the lower fan, and the other part of the airflow is sucked in by the upper fan, wherein the airflow sucked in by the lower fan passes through the intermediate air duct and the upper supply air duct in sequence and is discharged from the outside of the casing from the upper air outlet, and the airflow sucked in by the upper fan passes through the upper supply air duct and is discharged from the outside of the casing from the upper air outlet, so that when the air conditioner is operating in an upper air outlet cooling mode, a first flow path can be formed inside the air conditioner with air entering from the lower air outlet and air exiting from the upper air outlet; When the air conditioner is operating in a single downward air outlet heating mode, the upper fan and the lower fan are controlled to be turned on, the upper flow path control mechanism shuts off the connection between the upper supply duct and the upper fan outlet end while opening the upper return air outlet, and the lower flow path control mechanism connects the lower supply duct and the lower fan outlet end while closing the lower return air outlet, and the airflow outside the casing enters the casing cavity through the upper air outlet and the upper return air outlet in turn, a part of the airflow entering the casing cavity is sucked in by the upper fan, and the other part of the airflow is sucked in by the lower fan, wherein the airflow sucked in by the upper fan passes through the intermediate air duct and the lower supply air duct in turn and is discharged from the outside of the casing from the lower air outlet, and the airflow sucked in by the lower fan passes through the lower supply air duct and is discharged from the outside of the casing from the lower air outlet, so that when the air conditioner is operating in a single downward air outlet heating mode, a second flow path can be formed inside the air conditioner with air entering from the upper air outlet and air exiting from the lower air outlet; When the air conditioner is running in the self-cleaning mode, one of the upper fan and the lower fan is controlled to be turned on and the other is controlled to be turned off, the upper flow path control mechanism opens the upper return air outlet and cuts off the connection between the upper air supply duct and the air outlet end of the upper fan, and the lower flow path control mechanism opens the lower return air outlet and cuts off the connection between the lower air supply duct and the air outlet end of the lower fan, the airflow in the shell cavity can be sucked in by the turned-on fan and enter the unturned fan through the middle air duct, and return to the shell cavity through the air inlet of the unturned fan, so that a third flow path for circulating airflow is formed inside the air conditioner when the air conditioner is running in the self-cleaning mode; The air conditioner further comprises a humidifying device, which is used for humidifying the air flow in the air duct when the air conditioner operates in an upper air outlet cooling mode, a lower air outlet heating mode or a self-cleaning mode.

10. The cabinet air conditioner according to claim 9, characterized in that: The air duct component includes an air duct component A side and an air duct component B side opposite to each other in the axial direction of the fan, and a vent penetrating the air duct component A and the air duct component B side is provided on the air duct component, and the vent is connected to the housing cavity; The humidifying device is arranged in the vent.

11. The cabinet air conditioner according to claim 9 or 10, characterized in that: The upper air supply duct has an upper air supply duct side A close to the upper fan and an upper air supply duct side B close to the upper air outlet, and the upper air supply duct includes a first upper air supply duct and a second upper air supply duct separated at the upper air supply duct side A and connected at the upper air supply duct side B; The lower air supply duct has a lower air supply duct A side close to the lower fan and a lower air supply duct B side close to the lower air outlet, and the lower air supply duct includes a first lower air supply duct and a second lower air supply duct separated at the lower air supply duct A side and connected at the lower air supply duct B side; The upper flow path control mechanism includes an upper baffle mechanism rotatably arranged at a communication position between the upper fan outlet end and the first upper air supply duct, and an upper volute tongue mechanism capable of circumferentially sliding around a preset rotation axis of the upper fan, wherein the upper baffle mechanism has a first upper rotation position and a second upper rotation position when rotating, and the upper volute tongue mechanism has a first upper sliding position and a second upper sliding position when sliding, wherein when the upper baffle mechanism is in the first upper rotation position, the upper return air outlet is opened while blocking the upper fan outlet end and the first upper air supply duct. The connection of the air duct, when the upper baffle mechanism is located at the second upper rotation position, the upper return air outlet is closed and connected with the upper fan outlet end and the first upper air supply duct at the same time, when the upper volute tongue mechanism is located at the first upper sliding position, the upper fan outlet end is connected with the middle air duct while blocking the connection of the upper fan outlet end and the second upper air supply duct at the same time, when the upper volute tongue mechanism is located at the second upper sliding position, the upper fan outlet end is connected with the second upper air supply duct while blocking the connection of the upper fan outlet end and the middle air duct at the same time; The lower flow path control mechanism includes a lower baffle mechanism rotatably arranged at the connecting position between the lower fan outlet end and the first lower air supply duct, and a lower volute tongue mechanism that can slide circumferentially around a preset rotation axis of the lower fan, the lower baffle mechanism has a first lower rotation position and a second lower rotation position when rotating, and the lower volute tongue mechanism has a first lower sliding position and a second lower sliding position when sliding, wherein when the lower baffle mechanism is in the first lower rotation position, the lower return air outlet is opened and the connection between the lower fan outlet end and the first lower air supply duct is blocked, when the lower baffle mechanism is in the second lower rotation position, the lower return air outlet is closed and the lower fan outlet end is connected with the first lower air supply duct, when the lower volute tongue mechanism is in the first lower sliding position, the lower fan outlet end is connected with the intermediate air duct while blocking the connection between the lower fan outlet end and the second lower air supply duct, and when the lower volute tongue mechanism is in the second sliding position, the lower fan outlet end is connected with the second lower air supply duct while blocking the connection between the lower fan outlet end and the intermediate air duct.

12. The cabinet air conditioner according to claim 9 or 10, characterized in that: The indoor heat exchanger comprises an upper heat exchange portion opposite to the axial air inlet of the upper fan, and a lower heat exchange portion opposite to the axial air inlet of the lower fan; The upper heat exchange part and the lower heat exchange part form a V-shaped heat exchange element with a recess facing one side of the air duct component.

13. The cabinet air conditioner according to claim 9 or 10, characterized in that: The upper air vent and the lower air vent can be controlled to be opened or closed; When the air conditioner operates in a self-cleaning mode, the upper air vent and the lower air vent are controlled to be closed.

14. The cabinet air conditioner according to claim 9 or 10, characterized in that: The upper part of the housing is provided with an upper auxiliary air inlet which can be controlled to be opened or closed, and the lower part of the housing is provided with a lower auxiliary air inlet which can be controlled to be opened or closed; When the air conditioner operates in a self-cleaning mode, the upper air vent, the lower air vent, the upper auxiliary air inlet and the lower auxiliary air inlet are controlled to be closed.

15. The cabinet air conditioner according to claim 9 or 10, characterized in that: The upper fan and the lower fan are both centrifugal fans, and the upper fan and the lower fan have opposite rotation directions.

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