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

Abstract

The application provides an air conditioner self-cleaning control method with a humidifying function and a cabinet air conditioner, and belongs to the field of air conditioners. The air conditioner can realize a single lower air outlet heating mode with air entering from an upper air outlet and air exiting from a lower air outlet, can realize a single upper air outlet cooling mode with air entering from the lower air outlet and air exiting from the upper air outlet, and can realize a self-cleaning mode with air circulating in the air conditioner. In the self-cleaning mode, the temperature of an indoor heat exchanger is controlled to make the air in the air conditioner frost in the air duct and then defrost, so that the self-cleaning effect of the air duct and the fan blade in the air conditioner is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the air conditioning technical field, and particularly to an air conditioner self-cleaning control method with humidification function and a cabinet air conditioner. BACKGROUND

[0002] With the increase of people's health consciousness, when the air conditioner is running in the cooling mode, condensate water is easily generated in the air conditioner due to the low temperature of the outlet air. In addition, the internal pressure is lower than the external pressure due to the operation of the fan. After a long time of operation, the dust on the surface of the air duct and the fan mixes with the condensate water, and the surface is seriously contaminated, which is easy to breed bacteria and produce peculiar smell of the outlet air, resulting in the decrease of the air cleanliness of the whole room and the increase of the symptoms such as cold of the human body.

[0003] The existing air conditioner processing method is mainly to clean and disinfect the indoor heat exchanger, but cannot realize the cleaning of the air duct and the fan blade, resulting in poor actual disinfection effect of the air conditioner. In addition, when cleaning, high-temperature hot air is blown out, which causes strong discomfort to the indoor temperature, resulting in poor actual use effect. SUMMARY

[0004] In order to overcome the problems that the air conditioner in the related art cannot realize the cleaning of the air duct and the fan blade, and the high-temperature hot air is blown into the room when cleaning, resulting in poor user experience, the present application embodiment proposes an air conditioner self-cleaning control method with humidification function and a cabinet air conditioner. The air conditioner can realize the single-down air outlet heating mode of the upper air inlet and the lower air outlet by the setting of the flow path control structure, can realize the single-up air outlet cooling mode of the lower air inlet and the upper air outlet, and can realize the self-cleaning mode of the air circulation in the air conditioner. In addition, in the self-cleaning mode, the temperature of the heat exchanger is controlled to make the air flow in the air duct frost and defrost, so as to realize the self-cleaning effect of the air duct and the fan blade in the air conditioner.

[0005] The first aspect of the present application embodiment proposes an air conditioner self-cleaning control method with humidification function. The air conditioner is provided with an upper air inlet, a lower air inlet, an air duct communicated with the upper air inlet and the lower air inlet, an indoor heat exchanger, a flow path control mechanism, an upper fan, a lower fan and a humidifying device providing humidification for the air duct.

[0006] The upper fan and the lower fan are correspondingly arranged with the upper air inlet and the lower air inlet.

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

[0008] When the air conditioner is in the 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 air fan and the lower air fan provides power for the airflow to flow in the first flow path from the lower air outlet to the upper air outlet.

[0009] When the air conditioner is in the 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 air fan and the lower air fan provides power for the airflow to flow in the second flow path from the upper air outlet to the lower air outlet.

[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 connecting the head and the tail inside the air conditioner, and the upper air fan or the lower air fan is used to provide power for the airflow to circulate in the third flow path.

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

[0012] Controlling the flow path control mechanism to form a closed loop third flow path in the air duct inside the air conditioner;

[0013] Operating the air conditioner in a cooling state, controlling one of the upper air fan and the lower air fan to be turned on and the other to be turned off, opening the humidifying device to provide humidification to the airflow in the air duct, and simultaneously controlling the rotation speed value of the fan to change the temperature value of the indoor heat exchanger;

[0014] By changing the temperature value of the indoor heat exchanger, the airflow in the air duct is frozen and then melted in the air duct to achieve self-cleaning of the air 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, by changing the temperature value of the indoor heat exchanger, the airflow in the air duct is frozen and then melted in the air duct to achieve self-cleaning of the air duct, comprising:

[0017] When the air conditioner operates in the cooling state, the rotation speed value of the fan is reduced to make the temperature value of the indoor heat exchanger reach a third preset temperature, and when the temperature value of the indoor heat exchanger reaches the third preset temperature, the humidifying device is turned off, and the air conditioner is controlled to operate in the heating state.

[0018] The third preset temperature is a temperature value that can cause the airflow in the air duct to freeze.

[0019] In the above technical solution, when the air conditioner operates in the cooling state, the rotation speed value of the fan is reduced to make the temperature value of the indoor heat exchanger reach a third preset temperature, comprising:

[0020] controlling the fan to run at the current speed for a first preset time length when the indoor heat exchanger temperature reaches the first preset temperature;

[0021] controlling the fan to run at the current speed for a second preset time length when the indoor heat exchanger temperature reaches the second preset temperature after the fan runs for the first preset time length;

[0022] controlling the fan to run at the current speed for a second preset time length when the indoor heat exchanger temperature reaches the second preset temperature after the fan runs for the first preset time length;

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

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

[0025] obtaining the temperature value of the indoor heat exchanger, and controlling the fan that is opened again to be closed when the temperature value of the indoor heat exchanger reaches a fourth preset temperature;

[0026] wherein the fourth preset temperature > 50°.

[0027] In the above technical solution, when the indoor heat exchanger runs in the heating state, the fan that is controlled to be closed due to meeting the third preset temperature value is opened again, comprising:

[0028] controlling the closed fan to be opened and run at the lowest wind stop;

[0029] wherein the lowest wind stop speed of the fan is between 300 r / min and 350 r / min.

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

[0031] controlling the air conditioner to execute the self-cleaning mode when the air conditioner continuously runs in the cooling mode for a third preset time length or the time length of the air conditioner running in the cooling mode accumulates to a fourth preset time length;

[0032] The control method further comprises:

[0033] when the air conditioner executes the self-cleaning mode, closing the air outlet of the air conditioner that communicates with the external environment.

[0034] In the above technical solution, the air conditioner operates in cooling mode, controlling one of the upper and lower fans to be on and the other to be off, turning on the humidifier to provide humidification to the airflow in the duct, and simultaneously controlling the fan speed to change the temperature of the indoor heat exchanger; by changing the temperature of the indoor heat exchanger, the airflow in the duct frosts and then melts, thereby achieving self-cleaning of the duct, including:

[0035] First, turn on the upper fan and simultaneously control the speed of the upper fan to lower the temperature of the indoor heat exchanger tube wall to the first preset temperature, which is lower than the dew point temperature of the air in the duct.

[0036] Control the speed of the upper fan to make the temperature of the indoor heat exchanger tube wall continue to drop to the second preset temperature, causing frost to form on the inner wall of the air duct.

[0037] When the conditions for stopping frosting are met, the upper fan stops rotating and the humidification equipment is turned off, so that the air conditioner stops operating in cooling mode.

[0038] The air conditioner is switched to heating mode, and the upper fan is rotated to melt the frost on the air duct and make the high-temperature airflow flow towards the lower air outlet to complete the high-temperature self-cleaning and sterilization of the upper part of the air duct.

[0039] Maintain heating operation, turn off the upper fan, and control the lower fan to melt the frost layer in the air duct and drive the high-temperature airflow towards 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 this invention provides a cabinet-type air conditioner, which includes an upper air outlet, a lower air outlet, and an air duct communicating with the upper and lower air outlets, as well as an indoor heat exchanger, a flow path control mechanism, an upper fan, a lower fan, and a humidification device for providing humidification to the air duct, all mounted on the air duct.

[0041] The upper and lower fans are installed in correspondence with the upper and lower air vents;

[0042] The air conditioner has a cooling mode, a heating mode and a self-cleaning mode. The flow path control mechanism is used to control the air duct to form different flow paths in different operating 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 inside the air conditioner that connects the upper air vent and the lower air vent. At least one of the upper fan and the lower fan provides the power for the airflow to flow from the lower air vent to the upper air vent 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 inside the air conditioner that connects the upper air vent and the lower air vent. At least one of the upper fan and the lower fan provides the power for the airflow to flow from the upper air vent to the lower air vent 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 in the air conditioner, and the upper fan or the lower fan is used to provide power for the air flow to circulate in the third flow path.

[0046] The air conditioner executes the self-cleaning mode.

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

[0048] The shell is provided with an upper air outlet at the upper portion and a lower air outlet at the lower portion.

[0049] The air duct component is arranged inside the shell, and the outer portion of the air duct component and the shell define a shell cavity, and the inside of the air duct component is formed with 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 arranged in sequence and in fluid communication. The upper portion of the upper air supply duct is communicated with the upper air outlet, and the air duct wall of the upper air supply duct is provided with an upper return air outlet communicated with the shell cavity. The lower portion of the lower air supply duct is communicated with the lower air outlet, and the air duct wall of the lower air supply duct is provided with a lower return air outlet communicated with the shell cavity.

[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 has an upper fan air inlet communicated with the shell cavity, and the lower fan has a lower fan air inlet communicated with the shell cavity.

[0051] The indoor heat exchanger is arranged in the shell cavity and opposite to the fan air inlets in the air duct component.

[0052] The flow path control mechanism comprises an upper flow path control mechanism and a lower flow path control mechanism. The upper flow path control mechanism can be opened to open the upper return air outlet, close the communication between the upper air supply duct and the upper fan air outlet end, and close the communication between the lower air supply duct and the lower fan air outlet end. The lower flow path control mechanism can be opened to open the lower return air outlet, close the communication between the lower air supply duct and the lower fan air outlet end, and close the communication between the upper air supply duct and the upper fan air outlet end.

[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 runs in the single upper air-out cooling mode, the upper fan and the lower fan are controlled to be turned on, the upper flow path control mechanism is controlled to close the upper return air inlet while connecting the upper air supply duct and the upper fan air-out end, and the lower flow path control mechanism is controlled to open the lower return air inlet while disconnecting the lower air supply duct and the lower fan air-out end. The air outside the casing enters the casing cavity through the lower air inlet and the lower return air inlet in sequence. Part of the air entering the casing cavity is sucked into the lower fan, and the other part of the air is sucked into the upper fan. The air sucked into the lower fan is discharged from the upper air inlet outside the casing after passing through the intermediate air duct and the upper air supply duct in sequence. The air sucked into the upper fan is discharged from the upper air inlet outside the casing after passing through the upper air supply duct, so that the air conditioner can form a first flow path with air entering from the lower air inlet and air being discharged from the upper air inlet when the air conditioner runs in the single upper air-out cooling mode.

[0055] When the air conditioner runs in the single lower air-out heating mode, the upper fan and the lower fan are controlled to be turned on, the upper flow path control mechanism is controlled to open the upper return air inlet while disconnecting the upper air supply duct and the upper fan air-out end, and the lower flow path control mechanism is controlled to close the lower return air inlet while connecting the lower air supply duct and the lower fan air-out end. The air outside the casing enters the casing cavity through the upper air inlet and the upper return air inlet in sequence. Part of the air entering the casing cavity is sucked into the upper fan, and the other part of the air is sucked into the lower fan. The air sucked into the upper fan is discharged from the lower air inlet outside the casing after passing through the intermediate air duct and the lower air supply duct in sequence. The air sucked into the lower fan is discharged from the lower air inlet outside the casing after passing through the lower air supply duct, so that the air conditioner can form a second flow path with air entering from the upper air inlet and air being discharged from the lower air inlet when the air conditioner runs in the single lower air-out heating mode.

[0056] When the air conditioner runs 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 is controlled to open the upper return air inlet while disconnecting the upper air supply duct and the upper fan air-out end, and the lower flow path control mechanism is controlled to open the lower return air inlet while disconnecting the lower air supply duct and the lower fan air-out end. The air in the casing cavity can be sucked into the fan that is turned on and enter the fan that is turned off through the intermediate air duct, and then return to the casing cavity through the air inlet of the fan that is turned off, so that the air conditioner can form a third flow path for circulating the air when the air conditioner runs in the self-cleaning mode.

[0057] The air conditioner further comprises a humidifying device. The humidifying device is used to provide humidification to the air in the air duct when the air conditioner runs in the single upper air-out cooling mode, the single lower air-out heating mode, or the self-cleaning mode.

[0058] In the above technical solution, the air duct component includes opposite air duct component A side and air duct component B side in the axial direction of the fan. The air duct component is provided with a ventilation opening penetrating the air duct component A side and the air duct component B side. The ventilation opening communicates with the casing 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 A side close to the upper fan side and an upper air supply duct B side 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 A side and communicated at the upper air supply duct B side;

[0061] The lower air supply duct has a lower air supply duct A side close to the lower fan side and a lower air supply duct B side 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 A side and communicated at the lower air supply duct B side;

[0062] The upper flow path control mechanism includes an upper baffle mechanism rotationally arranged at a position where the upper fan outlet end and the first upper air supply duct are communicated, and an upper volute tongue mechanism capable of circumferentially sliding around a preset rotation axis of the upper fan, 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 located at the first upper rotation position, the upper return air outlet is opened while the communication between the upper fan outlet end and the first upper air supply duct is blocked, when the upper baffle mechanism is located at the second upper rotation position, the upper return air outlet is closed while the upper fan outlet end and the first upper air supply duct are communicated, when the upper volute tongue mechanism is located at the first upper sliding position, the upper fan outlet end is kept communicated with the intermediate air duct while the communication between the upper fan outlet end and the second upper air supply duct is blocked, and when the upper volute tongue mechanism is located at the second upper sliding position, the upper fan outlet end is communicated with the second upper air supply duct while the communication between the upper fan outlet end and the intermediate air duct is blocked;

[0063] The lower flow path control mechanism includes a lower baffle mechanism rotationally arranged at a position where the lower fan outlet end and the first lower air supply duct are communicated, and a lower volute tongue mechanism capable of circumferentially sliding 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 located at the first lower rotation position, the lower return air outlet is opened while the communication between the lower fan outlet end and the first lower air supply duct is blocked, when the lower baffle mechanism is located at the second lower rotation position, the lower return air outlet is closed while the lower fan outlet end and the first lower air supply duct are communicated, when the lower volute tongue mechanism is located at the first lower sliding position, the lower fan outlet end is kept communicated with the intermediate air duct while the communication between the lower fan outlet end and the second lower air supply duct is blocked, and when the lower volute tongue mechanism is located at the second lower sliding position, the lower fan outlet end is communicated with the second lower air supply duct while the communication between the lower fan outlet end and the intermediate air duct is blocked.

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

[0065] The upper heat exchange part and the lower heat exchange part form a V-shaped heat exchange part with the notches facing the air duct part.

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

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

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

[0069] When the air conditioner runs in the self-cleaning mode, the upper air inlet, the lower air inlet, the upper auxiliary air inlet and the lower auxiliary air inlet are controlled to be closed.

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

[0071] After the above technical solution is adopted, the present application has the following beneficial effects compared with the prior art:

[0072] In the embodiment of the present application, multiple air duct structures of the cabinet air conditioner are arranged, and the communication state between the multiple air ducts is controlled by a flow path control mechanism. On the one hand, the up-down reversible air supply effect of the cabinet air conditioner can be realized by 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 realized by the arrangement of the flow path control mechanism. On the other hand, when the self-cleaning effect of the air duct and the fan is realized, the influence of the high-temperature airflow in the self-cleaning process on the indoor temperature and cleanliness can be reduced, and the room comfort and cleanliness can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0073] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present application and, together with the specification, serve to explain the principles of the present application.

[0074] Figure 1 The figure is a schematic diagram of the sectional structure of the air conditioner in the embodiment of the cabinet air conditioner of the present application Figure 1 ;

[0075] Figure 2 The figure is a schematic diagram of the sectional structure of the air conditioner in the embodiment of the cabinet air conditioner of the present application Figure 2 ;

[0076] Figure 3 The figure is a schematic diagram of the sectional structure of the air conditioner in the embodiment of the cabinet air conditioner of the present application Figure 1 , in which the upper fan is turned on and the lower fan is turned off;

[0077] Figure 4 The figure is a schematic diagram of the sectional structure of the air conditioner in the embodiment of the cabinet air conditioner of the present applicationFigure 2 , the upper fan is opened and the lower fan is closed in the figure;

[0078] Figure 5 Fig. 2 is a schematic view of the sectional structure of the air conditioner in the embodiment of the cabinet air conditioner of the present application Figure 1 , the upper fan is closed and the lower fan is opened in the figure;

[0079] Figure 6 Fig. 2 is a schematic view of the sectional structure of the air conditioner in the embodiment of the cabinet air conditioner of the present application Figure 2 , the upper fan is closed and the lower fan is opened in the figure;

[0080] Figure 7 Fig. 2 is a schematic view of the sectional structure of the air conditioner in the embodiment of the cabinet air conditioner of the present application Figure 1 ;

[0081] Figure 8 Fig. 2 is a schematic view of the sectional structure of the air conditioner in the embodiment of the cabinet air conditioner of the present application Figure 2 .

[0082] wherein:

[0083] 1 - cabinet; 11 - upper air inlet; 12 - lower air inlet; 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 air return inlet; 22 - upper fan air duct; 23 - intermediate air duct; 24 - lower fan air duct; 25 - lower air supply duct; 251 - first lower air supply duct; 252 - second lower air supply duct; 253 - lower air return inlet; 26 - ventilation inlet;

[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 tongue mechanism;

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

[0090] 8 - humidifying device;

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

[0092] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the invention as detailed in the appended claims.

[0093] Current air conditioners suffer from the inability to clean their air ducts and fan blades, and the inability to blow hot air into the room during cleaning, resulting in a poor user experience. This invention proposes a cabinet-type air conditioner and its self-cleaning control method. By configuring multiple air duct structures within the cabinet-type air conditioner and controlling the connectivity between these ducts using a flow path control mechanism, the method achieves reversible vertical airflow. Furthermore, the flow path control mechanism enables self-cleaning of the air ducts and fan. Moreover, while achieving self-cleaning, it also reduces the impact of the high-temperature airflow during the self-cleaning process on indoor temperature and cleanliness, thus improving room comfort and cleanliness.

[0094] The following is in conjunction with the appendix Figure 1 -Appendix Figure 8 The technical solution of this embodiment is described in detail. Unless otherwise specified, the following implementation methods and embodiments can be combined with each other.

[0095] Example

[0096] like Figures 1-8 As shown, the first aspect of this invention proposes a self-cleaning control method for an air conditioner with humidification function. The air conditioner includes an upper air outlet, a lower air outlet, and an air duct communicating with the upper and lower air outlets, as well as an indoor heat exchanger, a flow path control mechanism, an upper fan, a lower fan, and a humidification device for providing humidification to the air duct, all mounted on the air duct.

[0097] The upper and lower fans are installed in correspondence with the upper and lower air vents;

[0098] The air conditioner has a cooling mode, a heating mode and a self-cleaning mode. The flow path control mechanism is used to control the air duct to form different flow paths in different operating 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 inside the air conditioner that connects the upper air vent and the lower air vent. At least one of the upper fan and the lower fan provides the power for the airflow to flow from the lower air vent to the upper air vent in the first flow path.

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

[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 in the air conditioner, the third flow path is communicated with the upper air fan or the lower air fan, and the upper air fan or the lower air fan is used to provide power for the air flow to circulate in the third flow path.

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

[0103] Controlling the flow path control mechanism to form a closed loop third flow path in the air conditioner;

[0104] Operating the air conditioner in a refrigeration state, controlling one of the upper air fan and the lower air fan to be turned on and the other to be turned off, opening the humidifying device to provide humidification to the air flow in the air duct, and controlling the rotation speed value of the fan to change the temperature value of the indoor heat exchanger;

[0105] 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.

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

[0107] In the embodiment of the application, by setting multiple air duct structures of the cabinet air conditioner and combining the flow path control mechanism to control the communication state between the multiple air ducts, on the one hand, the upper and lower reversible air supply effect of the cabinet air conditioner can be realized 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 realized through the setting of the flow path control mechanism, and on the other hand, when the self-cleaning effect of the air duct and the fan is realized, the influence of the high-temperature air flow in the self-cleaning process on the indoor temperature and cleanliness can be reduced, and the room comfort and cleanliness can be improved.

[0108] It is worth noting that the above-mentioned refrigeration operation and heating operation are explained from the perspective of the refrigeration and heating system, and the refrigeration mode and the heating mode are explained from the perspective of user demand. Specifically, only the temperature of the heat exchanger is changed when the refrigeration operation and the heating operation are changed, and not only the temperature of the heat exchanger is changed, but also the flow path of the air flow in the air conditioner is changed when the refrigeration mode and the heating mode are operated.

[0109] Specifically, 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, comprising:

[0110] When the air conditioner is operated in the refrigeration state, the rotation speed of the fan is reduced to make the temperature of the indoor heat exchanger 9 reach a third preset temperature, and when the temperature of the indoor heat exchanger 9 reaches the third preset temperature, the humidifying device is closed, and the air conditioner is controlled to operate in the heating state.

[0111] The third preset temperature is a temperature value at which the airflow in the air duct can be frosted.

[0112] In the embodiment of the application, the dust in the air duct is fully combined with the double layer by frosting the airflow in the air duct, and the condensed water combined with the dust can be quickly drained through defrosting operation, so that the self-cleaning effect of the air duct is achieved.

[0113] Further, when the air conditioner is operated in the refrigeration state, the rotation speed of the fan is reduced to make the temperature of the indoor heat exchanger 9 reach a third preset temperature, including:

[0114] controlling the fan to reduce the speed in the first stage, and when the temperature of the indoor heat exchanger 9 reaches a first preset temperature, controlling the fan to operate at the current speed for a first preset time length;

[0115] After the fan operates for the first preset time length, the fan is controlled to reduce the 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 operate at the current speed for a second preset time length;

[0116] After the fan operates for the second preset time length, the fan is controlled to reduce the 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 closed;

[0117] The first preset temperature > the second preset temperature > the third preset temperature, and 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 should be noted that the first preset temperature and the second preset temperature are to make the air moisture condense into frost, and when the third preset temperature is reached, the frost layer is quickly melted by heating, so that the dust and water are quickly drained.

[0119] In any of the above embodiments, when the indoor heat exchanger 9 is operated in the heating state, the fan closed due to meeting the third preset temperature value is controlled to be opened again;

[0120] The temperature of the indoor heat exchanger 9 is obtained, and when the temperature of the indoor heat exchanger 9 reaches a fourth preset temperature, the fan opened again is controlled to be closed;

[0121] The fourth preset temperature > 50°.

[0122] Further, when the indoor heat exchanger 9 is operated in the heating state, the closed fan is controlled to be opened again, including:

[0123] controlling the closed fan to start running at the lowest wind stop;

[0124] wherein the lowest wind stop rotating speed of the fan is between 300 r / min and 350 r / min.

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

[0126] controlling the air conditioner to execute the self-cleaning mode when the air conditioner continuously runs in the cooling mode for a third preset time length or the time length of the air conditioner running in the cooling mode accumulates to a fourth preset time length;

[0127] The control method further comprises:

[0128] when the air conditioner executes the self-cleaning mode, closing the air outlet of the air conditioner communicating with the external environment.

[0129] It is worth noting that the third preset time length and the fourth preset time length can be the same or different, and the specific time length value can be set according to the specific parameters of the model.

[0130] In any of the above embodiments, the air conditioner is controlled to run in a cooling state, one of the upper fan and the lower fan is turned on and the other is turned off, the humidifying device is turned on to provide humidification to the airflow in the air duct, and the rotating 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 to realize self-cleaning of the air duct, including:

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

[0132] the rotating speed of the upper fan is controlled to make the temperature of the indoor heat exchanger tube wall continue to drop to a second preset temperature to frost the inner wall of the air duct;

[0133] when it is judged that the termination of frosting condition is met, the rotation of the upper fan is stopped and the humidifying device is turned off, so that the air conditioner exits the cooling state running;

[0134] controlling the air conditioner to run in a heating state, controlling the upper fan to rotate to melt the frost layer of the air duct and make the high-temperature airflow flow to the lower air outlet direction to complete the high-temperature self-cleaning sterilization of the upper half of the air duct;

[0135] maintaining the heating running state, closing the upper fan, and controlling the lower fan to rotate to melt the frost layer of the air duct and drive the high-temperature airflow to flow to the upper air outlet direction to complete the high-temperature self-cleaning sterilization of the lower half of the air duct.

[0136] It is worth mentioning that the "terminating frosting condition" can be the thickness of the frost layer, the running time of the refrigeration, or the temperature value of the tube wall of the indoor heat exchanger.

[0137] In order to more clearly understand how the air conditioner in the embodiment is cleaned, the following describes the cleaning process of the air conditioner in the embodiment with reference to the accompanying drawings. Figure 8 The self-cleaning mode of the air conditioner is described in detail as follows:

[0138] As shown in Figure 8 :

[0139] ① When the air conditioner is continuously operated in the cooling mode for a long time or the cumulative cooling operation reaches the maximum time, the self-cleaning condition is met, and the self-cleaning function is executed after the air conditioner is stopped.

[0140] ② When the self-cleaning function is started, the upper flow path control mechanism 6 opens the upper return air outlet 213 while shutting off the communication between the upper air supply duct 21 and the air outlet end of the upper fan, and the lower flow path control mechanism 7 opens the lower return air outlet 253 while shutting off the communication between the lower air supply duct 25 and the air outlet end of the lower fan. The airflow in the shell cavity 3 can be sucked into the fan that is not opened and enter the fan that is not opened through the intermediate air duct 23, and then return to the shell cavity 3 through the air inlet of the fan that is not opened, so as to realize the circulation of the airflow in the air conditioner. At this time, the air conditioner is internally composed of the airflow circulation.

[0141] ③ The air conditioner is operated in the cooling mode, the lower fan 5 is kept in the closed state, the upper fan 4 is operated at a speed to a set wind stop, and the humidifying atomizer is opened to humidify the air duct. The temperature of the indoor heat exchanger 9 is reduced to a first preset temperature by reducing the speed of the fan, so that the temperature inside the air duct is lower than the dew point temperature of the air, and the condensate water is generated inside the air duct, so that the dust is mixed with the condensate water and the atomized water vapor.

[0142] ④ The temperature of the indoor heat exchanger is reduced to a second preset temperature by reducing the speed of the upper fan, and the atomized water vapor and the condensate water begin to frost on the inner wall of the air duct. When the temperature of the indoor heat exchanger reaches a third preset temperature, the upper fan is stopped when the frost thickness is relatively thick, the humidifying atomizer is closed, and the cooling mode is exited.

[0143] ⑤ The air conditioner is switched to the heating mode, the upper fan is opened and operated to the lowest wind stop, the temperature inside the air duct is quickly raised, and the frost layer is quickly peeled off from the surface of the air duct and the fan.

[0144] ⑥ The speed of the upper fan is controlled to keep the temperature of the indoor heat exchanger at a fourth preset temperature, and the high-temperature airflow is driven to flow by the operation of the upper fan, so as to perform high-temperature self-cleaning and sterilization on the lower fan air duct 24 and the lower fan 5.

[0145] ⑦, after the high-temperature self-cleaning of the lower air fan 5 is completed, the lower air fan 5 is opened, the upper air fan 4 is closed, the upper air fan air duct 22 and the upper air fan 4 are subjected to high-temperature self-cleaning, and thus the high-temperature self-cleaning of the entire air duct component is realized.

[0146] ⑧, after the self-cleaning is completed, the air conditioner is turned off, the self-cleaning function is exited, and a standby state is entered.

[0147] It should be noted that preferably, the first preset temperature is above 0 DEG C, the second preset temperature and the third preset temperature are both below 0 DEG 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 control is above 50 DEG C.

[0148] The second aspect of the embodiment of the application further provides a cabinet air conditioner, which comprises an upper air outlet, a lower air outlet, an air duct communicating with the upper air outlet and the lower air outlet, an indoor heat exchanger, a flow path control mechanism, an upper air fan, a lower air fan and a humidifying device providing humidification for the air duct.

[0149] The upper air fan and the lower air fan are correspondingly arranged with the upper air outlet and the lower air outlet.

[0150] The air conditioner comprises a refrigeration mode, a heating mode and a self-cleaning mode, and the flow path control mechanism is used for controlling the air duct to form different flow paths in different operation modes of the air conditioner.

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

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

[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 communicating the head and the tail inside the air conditioner, and the upper air fan or the lower air fan is used for providing power for the air flow 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 application.

[0155] Further, the cabinet air conditioner further comprises:

[0156] The housing 1 has an upper air vent 11 at its upper part and a lower air vent 12 at its lower part. It should be noted that the upper and lower parts mentioned in this embodiment are only relative and do not mean that the upper part is the top and the lower part is the bottom. In some alternative embodiments, the upper air vent near the upper part or the lower air vent near the lower part can be understood as the upper air vent being set at the upper part and the lower air vent being set at the lower part.

[0157] Air duct component 2, which is located inside the housing 1, such as Figures 1-6 As shown, preferably, the air duct component 2 extends along the height direction of the housing 1 and is disposed inside the housing 1. The outer side of the air duct component 2 and the housing 1 define a housing cavity 3. The interior is formed with 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 arranged vertically and communicating with each other. The upper part of the upper air supply duct 21 is connected to the upper air outlet 11, and the air duct wall of the upper air supply duct 21 is provided with an upper return air outlet 213 that connects to the housing cavity 3. The lower part of the lower air supply duct 25 is connected to the lower air outlet 12, and the air duct wall of the lower air supply duct 25 is provided with a lower return air outlet 253 that connects to the housing cavity 3.

[0158] The fan includes an upper fan 4 located in the upper fan duct 22 and a lower fan 5 located in the lower fan duct 24. The upper fan 4 has an upper fan inlet 41 that communicates with the housing cavity, and the lower fan 5 has a lower fan inlet 51 that communicates with the housing cavity 3.

[0159] Indoor heat exchanger 9 is located inside the shell cavity 3 and is opposite to the fan 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 shut off the connection between the upper air supply duct 21 and the upper fan outlet while opening the upper return air inlet 213, and connect the upper air supply duct 21 and the upper fan outlet while closing the upper return air inlet 213. The lower flow path control mechanism 7 can shut off the connection between the lower air supply duct 25 and the lower fan outlet while opening the lower return air inlet 253, and connect the lower air supply duct 25 and the lower fan outlet while closing the lower return air inlet 253.

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

[0162] When the air conditioner runs in the single upper air-out cooling mode, the upper air fan 4 and the lower air fan 5 are controlled to be turned on, the upper air passage control mechanism 6 is controlled to connect the upper air supply passage 21 and the upper air fan air-out end while closing the upper air return port 213, and the lower air passage control mechanism 7 is controlled to disconnect the lower air supply passage 25 and the lower air fan air-out end while opening the lower air return port 253. At this time, the air outside the casing 1 enters the casing cavity 3 through the lower air port 12 and the lower air return port 253 in sequence, part of the air entering the casing cavity 3 is sucked into the lower air fan 5, and the other part of the air is sucked into the upper air fan 4. The air sucked into the lower air fan 5 is discharged out of the casing 1 from the upper air port 11 through the intermediate air passage 23 and the upper air supply passage 21 in sequence, and the air sucked into the upper air fan 4 is discharged out of the casing 1 from the upper air port 11 through the upper air supply passage 21, so that the air conditioner can form a first flow path with air entering from the lower air port and air out from the upper air port when the air conditioner runs in the single upper air-out cooling mode.

[0163] When the air conditioner runs in the single lower air-out heating mode, the upper air fan 4 and the lower air fan 5 are controlled to be turned on, the upper air passage control mechanism 6 is controlled to connect the upper air supply passage 21 and the upper air fan air-out end while closing the upper air return port 213, and the lower air passage control mechanism 7 is controlled to disconnect the lower air supply passage 25 and the lower air fan air-out end while opening the lower air return port 253. At this time, the air outside the casing 1 enters the casing cavity 3 through the upper air port 11 and the upper air return port 213 in sequence, part of the air entering the casing cavity 3 is sucked into the upper air fan 4, and the other part of the air is sucked into the lower air fan 5. The air sucked into the upper air fan 4 is discharged out of the casing 1 from the lower air port 12 through the intermediate air passage 23 and the lower air supply passage 25 in sequence, and the air sucked into the lower air fan 5 is discharged out of the casing 1 from the lower air port 12 through the lower air supply passage 25, so that the air conditioner can form a second flow path with air entering from the upper air port and air out from the lower air port when the air conditioner runs in the single lower air-out heating mode.

[0164] When the air conditioner runs in the self-cleaning mode, one of the upper air fan 4 and the lower air fan 5 is controlled to be turned on, and the other is controlled to be turned off, the upper air passage control mechanism 6 is controlled to connect the upper air supply passage 21 and the upper air fan air-out end while closing the upper air return port 213, and the lower air passage control mechanism 7 is controlled to connect the lower air supply passage 25 and the lower air fan air-out end while closing the lower air return port 253. The air in the casing cavity 3 can be sucked into the fan that is turned on and enter the fan that is turned off through the intermediate air passage 23, and return to the casing cavity 3 through the air inlet of the fan that is turned off, so that the air conditioner can form a third flow path for circulating air flow when the air conditioner runs in the self-cleaning mode.

[0165] The air conditioner further comprises a humidifying device, and the humidifying device 8 is used to provide humidification to the air flow in the air passage when the air conditioner runs in the single upper air-out cooling mode, the single lower air-out heating mode or the self-cleaning mode.

[0166] That is, in the embodiment of the present application, by setting multiple air duct flow paths of the cabinet air conditioner and combining the flow path control mechanism to control the communication state between the multiple air duct flow paths, on the one hand, the up-down reversible air supply effect of the cabinet air conditioner can be realized 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 realized through the setting of the flow path control mechanism, and on the other hand, since the airflow is internally circulated in the air conditioner during self-cleaning, the air conditioner can avoid the high-temperature or low-temperature airflow discharged into the room during the self-cleaning process while realizing the self-cleaning effect, thereby avoiding the influence on the indoor temperature and cleanliness during the self-cleaning process, and then improving the room comfort and cleanliness.

[0167] Among them, when the air conditioner runs in the self-cleaning mode, the humidifying device 8 is controlled to be turned on by the control module to realize the cleaning of the air duct and the fan by combining the humidified airflow and the temperature change of the airflow in the air conditioner.

[0168] Preferably, the humidifying device 8 described above is a humidifying atomizer. When the humidifying atomizer is started, the atomized water vapor can directly enter the air duct along with the airflow and be sent out with the air supply airflow. In addition to meeting the basic refrigeration, heating and humidification requirements, the air duct inside can be humidified to achieve the effect of washing the air duct inside.

[0169] Further, as shown in Figure 4 and Figure 6 , the air duct component 2 includes opposite air duct component A side and air duct component B side in the axial direction of the fan. The air duct component is provided with a ventilation opening 26 penetrating the air duct component A side and the air duct component B side, and the ventilation opening 26 communicates with the shell cavity 3.

[0170] Among them, the humidifying device 8 is arranged in the ventilation opening 26.

[0171] Since the shell cavity 3 communicates with the air inlet of the fan, the shell cavity 3 also communicates with the ventilation opening 26, and the humidifying device 8 is arranged in the ventilation opening 26. Therefore, when the fan is started, the airflow can pass through the ventilation opening 26 and mix with the atomized water vapor to be sucked into the fan, so as to realize the effect of humidifying the air duct inside.

[0172] In the above technical solution, as shown in Figure 2 , Figure 4 and Figure 6 , the upper air supply duct 21 has an upper air supply duct A side close to one side of the upper fan 4 and an upper air supply duct B side close to one side of the upper air outlet 11. 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 communicated 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 air fan 5 side and a lower air supply duct B side close to the lower air outlet side, and the lower air supply duct 25 includes a first lower air supply duct 251 and a second lower air supply duct 252 separated at the lower air supply duct A side and communicated 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 communicated between the upper air fan outlet end and the first upper air supply duct 211, and an upper volute tongue mechanism 62 capable of circumferentially sliding around a preset rotation axis of the upper air 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 tongue 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 the communication between the upper air fan outlet end and the first upper air supply duct 211 is blocked, when the upper baffle mechanism 61 is located at the second upper rotation position, the upper return air outlet 213 is closed while the communication between the upper air fan outlet end and the first upper air supply duct 211 is communicated, when the upper volute tongue mechanism 62 is located at the first upper sliding position, the upper air fan outlet end is communicated with the intermediate air duct 23 while the communication between the upper air fan outlet end and the second upper air supply duct 212 is blocked, and when the upper volute tongue mechanism 62 is located at the second upper sliding position, the upper air fan outlet end is communicated with the second upper air supply duct 212 while the communication between the upper air fan outlet end and the intermediate air duct 23 is blocked.

[0175] The lower flow path control mechanism 7 includes a lower baffle mechanism 71 rotatably arranged at a position communicated between the lower air fan outlet end and the first lower air supply duct 251, and a lower volute tongue mechanism 72 capable of circumferentially sliding around a preset rotation axis of the lower air 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 tongue mechanism 72 has a first lower sliding position and a second lower sliding position when sliding, wherein when the lower baffle mechanism 71 is located at the first lower rotation position, the lower return air outlet 253 is opened while the communication between the lower air fan outlet end and the first lower air supply duct 251 is blocked, when the lower baffle mechanism 71 is located at the second lower rotation position, the lower return air outlet 253 is closed while the communication between the lower air fan outlet end and the first lower air supply duct 251 is communicated, when the lower volute tongue mechanism 72 is located at the first lower sliding position, the lower air fan outlet end is communicated with the intermediate air duct 23 while the communication between the lower air fan outlet end and the second lower air supply duct 252 is blocked, and when the lower volute tongue mechanism 72 is located at the second sliding position, the lower air fan outlet end is communicated with the second lower air supply duct 252 while the communication between the lower air fan outlet end and the intermediate air duct 23 is blocked.

[0176] Specifically:

[0177] When the air conditioner runs in the single lower-outlet cooling mode, the lower damper mechanism 71 in the lower flow path control mechanism 7 rotates to the first lower rotating position, and the lower flapper mechanism 72 slides to the first lower sliding position. At this time, the lower damper mechanism 71 opens the lower return air outlet 253 while shutting the communication between the lower fan outlet end and the first lower air supply passage 251, and the lower flapper mechanism 72 communicates the lower fan outlet end and the intermediate air passage 23 while shutting the communication between the lower fan outlet end and the second lower air supply passage 252. Meanwhile, the upper damper mechanism 61 in the upper flow path control mechanism 6 rotates to the second upper rotating position, and the upper flapper mechanism 62 slides to the second upper sliding position. At this time, the upper damper mechanism 61 communicates the upper fan outlet end and the first upper air supply passage 211 while closing the upper return air outlet 213, and the upper flapper mechanism 62 communicates the upper fan outlet end and the second upper air supply passage 212 while shutting the communication between the upper fan outlet end and the intermediate air passage 23. At this time, the air outside the casing 1 enters the casing cavity 3 through the lower air outlet 12 and the lower return air outlet 253 in sequence, and part of the air entering the casing cavity 3 is sucked into the lower fan 5, and the other part of the air is sucked into the upper fan 4. The air sucked into the lower fan 5 is discharged from the upper air outlet 11 after passing through the intermediate air passage 23 and the first upper air supply passage 211 in sequence, and the air sucked into the upper fan 4 is discharged from the upper air outlet 11 after passing through the second upper air supply passage 212.

[0178] When the air conditioner runs in the single lower-outlet cooling mode, the lower damper mechanism 71 in the lower flow path control mechanism 7 rotates to the first lower rotating position, and the lower flapper mechanism 72 slides to the first lower sliding position. At this time, the lower damper mechanism 71 opens the lower return air outlet 253 while shutting the communication between the lower fan outlet end and the first lower air supply passage 251, and the lower flapper mechanism 72 communicates the lower fan outlet end and the intermediate air passage 23 while shutting the communication between the lower fan outlet end and the second lower air supply passage 252. Meanwhile, the upper damper mechanism 61 in the upper flow path control mechanism 6 rotates to the second upper rotating position, and the upper flapper mechanism 62 slides to the second upper sliding position. At this time, the upper damper mechanism 61 communicates the upper fan outlet end and the first upper air supply passage 211 while closing the upper return air outlet 213, and the upper flapper mechanism 62 communicates the upper fan outlet end and the second upper air supply passage 212 while shutting the communication between the upper fan outlet end and the intermediate air passage 23. At this time, the air outside the casing 1 enters the casing cavity 3 through the lower air outlet 12 and the lower return air outlet 253 in sequence, and part of the air entering the casing cavity 3 is sucked into the lower fan 5, and the other part of the air is sucked into the upper fan 4. The air sucked into the lower fan 5 is discharged from the upper air outlet 11 after passing through the intermediate air passage 23 and the first upper air supply passage 211 in sequence, and the air sucked into the upper fan 4 is discharged from the upper air outlet 11 after passing through the second upper air supply passage 212.

[0179] When the air conditioner runs the self-cleaning mode, the upper baffle mechanism 61 in the upper flow path control mechanism 6 rotates to the first upper rotating position, and the upper tongue mechanism 62 slides to the first upper sliding position. At this time, the upper baffle mechanism 61 opens the upper return air outlet 213 while blocking the communication between the upper fan outlet end and the first upper air supply duct 211, and the upper tongue mechanism 62 communicates the upper fan outlet end with the intermediate air duct 23 while blocking the communication between the upper fan outlet end and the second upper air supply duct 212. At the same time, the lower baffle mechanism 71 in the lower flow path control mechanism 7 rotates to the first lower rotating position, and the lower tongue mechanism 72 slides to the first lower sliding position. At this time, the lower baffle mechanism 71 opens the lower return air outlet 253 while shutting off the communication between the lower fan outlet end and the first lower air supply duct 251, and the lower tongue mechanism 72 communicates the lower fan outlet end with the intermediate air duct 23 while shutting off the communication between the lower fan outlet end and the second lower air supply duct 252. At this time, the outlet ends of the upper fan 4 and the lower fan 5 are communicated through the intermediate air duct 23. Since only one fan is turned on in the self-cleaning mode, the air flow in the shell cavity 3 can be sucked into the turned-on fan and enter the turned-off fan through the intermediate air duct 23, and then return to the shell cavity 3 through the air inlet of the turned-off fan, so as to realize the circulation of the air flow in the air conditioner.

[0180] Specifically, as shown in Figure 3 and Figure 4 , when the upper fan 4 is turned on and the lower fan 5 is turned off, the air flow flows out of the outlet end of the upper fan 4, flows to the lower fan 5 through the intermediate 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 then sucked into the upper fan 4 again, so as to realize the circulation of the air flow.

[0181] Specifically, as shown in Figure 5 and Figure 6 , when the upper fan 4 is turned off and the lower fan 5 is turned on, the air flow flows out of the outlet end 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 then sucked into the lower fan 5 again, so as to realize the circulation of the air flow.

[0182] Of course, as shown in Figures 1-6 , the cabinet type air conditioner provided in the embodiment of the present application further comprises an indoor heat exchanger 9 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, and the heat-exchanged air flow is sucked into the turned-on fan, so as to be discharged through the upper air outlet 11 or the lower air outlet 12 or circulated in the air conditioner. The specific flow path of the air flow is determined according to the operation mode of the air conditioner.

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

[0185] The upper heat exchange part 91 and the lower heat exchange part 92 form a V-shaped heat exchange member with the notch facing the air duct component 2.

[0186] In the embodiment, the indoor heat exchanger 9 is arranged as a V-shaped indoor heat exchanger 9, which can improve the heat exchange effect on the airflow. It should be noted that, since the air conditioner in the embodiment is a cabinet type air conditioner, when the airflow flows in the air conditioner, the airflow flows from top to bottom or from bottom to top. Therefore, by arranging the indoor heat exchanger 9 as a V-shaped heat exchange member with the notch facing the air duct component 2, the contact area of the airflow with the indoor heat exchanger 9 can be increased when the airflow flows along the height direction of the machine body, thereby improving the heat exchange effect on the airflow. Meanwhile, the V-shaped indoor heat exchanger 9 will not cause the air conditioner to have a large overall size, thereby improving the heat exchange effect on the airflow without increasing the overall size of the air conditioner.

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

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

[0189] In the embodiment, when the air conditioner operates in the self-cleaning mode, the upper air inlet 11 and the lower air inlet 12 are closed, which can further prevent the airflow inside the air conditioner from flowing into the room, thereby further reducing the influence of the high-temperature airflow in the sterilization and self-cleaning process on the room temperature and cleanliness, and improving the room comfort and cleanliness.

[0190] In any of the above embodiments, as shown, Figures 1-6 the upper part of the machine shell 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 machine shell 1 is provided with a lower auxiliary air inlet 14 which can be controlled to be opened or closed.

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

[0192] In the embodiment, by arranging the upper auxiliary air inlet 13 and the lower auxiliary air inlet 14, the air inlet amount of the air conditioner when operating in the cooling mode or the heating mode can be improved, thereby improving the air outlet amount of the air conditioner when operating in the cooling mode or the heating mode, and improving the cooling effect and the heating effect.

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

[0194] In summary, in the embodiment of the present application, by setting multiple air duct flow paths of the cabinet air conditioner, and combining the flow path control mechanism to control the communication state between the multiple air duct flow paths, on the one hand, the up-down reversible air supply effect of the cabinet air conditioner can be realized 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 realized through the setting of the breakable mechanism, and on the other hand, since the airflow is internally circulated in the air conditioner during self-cleaning, the air conditioner can avoid the high-temperature or low-temperature airflow being discharged into the indoor during the self-cleaning process while realizing the self-cleaning effect, thereby avoiding the influence on the indoor temperature and cleanliness during the self-cleaning process, and then improving the room comfort and cleanliness.

[0195] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the features disclosed herein. It is intended that the specification and examples be considered as exemplary only, with the true scope and spirit of the application being indicated by the following claims.

[0196] It should be understood that the application is not limited to the precise construction that has been described above and illustrated in the accompanying drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application. The scope of the application is limited only by the appended claims.

Claims

1. A self-cleaning control method of an air conditioner with a humidifying function, the air conditioner comprising: an upper air outlet, a lower air outlet, an air duct communicating with the upper air outlet and the lower air outlet, and an indoor heat exchanger, a flow path control mechanism, an upper air fan, a lower air fan, and a humidifying device provided on the air duct to provide a humidifying effect for the air duct; an air duct component provided inside a cabinet, an outer portion of the air duct component and the cabinet defining a housing cavity, and an upper air supply duct, an upper air fan duct, a middle air duct, a lower air fan duct, and a lower air supply duct arranged in sequence from top to bottom and in fluid communication being formed inside the air duct component, an upper portion of the upper air supply duct communicating with the upper air outlet, and an air duct wall of the upper air supply duct being provided with an upper return air outlet communicating with the housing cavity, a lower portion of the lower air supply duct communicating with the lower air outlet, and an air duct wall of the lower air supply duct being provided with a lower return air outlet communicating with the housing cavity; wherein: the upper air fan and the lower air fan are correspondingly provided with the upper air outlet and the lower air outlet, the flow path control mechanism comprises an upper flow path control mechanism and a lower flow path control mechanism, the upper flow path control mechanism is capable of closing the communication between the upper air supply duct and an air outlet end of the upper air fan while opening the upper return air outlet, and is capable of communicating the upper air supply duct and the air outlet end of the upper air fan while closing the upper return air outlet, the lower flow path control mechanism is capable of closing the communication between the lower air supply duct and an air outlet end of the lower air fan while opening the lower return air outlet, and is capable of communicating the lower air supply duct and the air outlet end of the lower air fan while closing the lower return air outlet; the air conditioner is provided with a refrigeration 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 in different operation modes of the air conditioner; when the air conditioner is in the refrigeration mode, the flow path control mechanism controls the air duct to form a first flow path communicating with the upper air outlet and the lower air outlet inside the air conditioner, and at least one of the upper air fan and the lower air fan provides a driving force for the air flow to flow in the first flow path from the lower air outlet to the upper air outlet; when the air conditioner is in the heating mode, the flow path control mechanism controls the air duct to form a second flow path communicating with the upper air outlet and the lower air outlet inside the air conditioner, and at least one of the upper air fan and the lower air fan provides a driving force for the air flow to flow in the second flow path from the upper air outlet to the lower air outlet; 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 communicating at both ends inside the air conditioner, and the upper air fan or the lower air fan is used to provide a driving force for the air flow to circulate in the third flow path; the self-cleaning control method comprises: when the air conditioner operates in the self-cleaning mode, controlling the flow path control mechanism to form a closed loop third flow path inside the air conditioner; operating the air conditioner in a refrigeration state, controlling one of the upper air fan and the lower air fan to be turned on and the other to be turned off, opening the humidifying device to provide a humidifying effect for the air flow in the air duct, and simultaneously controlling a rotation speed value of the air fan to change a temperature value of the indoor heat exchanger; changing the temperature value of the indoor heat exchanger to cause the air flow in the air duct to freeze and thaw in the air duct, so as to realize self-cleaning of the air duct. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The operation state of the air conditioner includes a refrigeration operation state and a heating operation state; The air conditioner is operated in the refrigeration state, one of the upper fan and the lower fan is turned on, the other is turned off, the humidifying device is opened to provide humidification to the airflow in the air duct, and the rotation speed value of the fan is controlled to change the temperature value of the indoor heat exchanger; 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, to realize self-cleaning of the air duct, including: The upper fan is first turned on, and the rotation speed of the upper fan is controlled to make the temperature of the wall of the indoor heat exchanger drop to a first preset temperature, which is lower than the dew point temperature of the air in the air duct; The rotation speed of the upper fan is controlled to make the temperature of the wall of the indoor heat exchanger continue to drop to a second preset temperature to frost the inner wall of the air duct; When it is judged that the termination of frosting conditions is met, the rotation of the upper fan is stopped, and the humidifying device is turned off, so that the air conditioner exits the refrigeration operation state; The air conditioner is controlled to operate in the heating state, the upper fan is controlled to rotate to melt the frost layer of the air duct and make the high-temperature airflow flow in the downward direction of the air outlet to complete the high-temperature self-cleaning and sterilization of the upper half of the air duct; The heating operation state is maintained, the upper fan is turned off, and the lower fan is controlled to rotate to melt the frost layer of the air duct and drive the high-temperature airflow to flow in the upward direction of the air outlet to complete the high-temperature self-cleaning and sterilization of the lower half of the air duct.

2. The self-cleaning control method of claim 1, wherein, 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, to realize self-cleaning of the air duct, including: When the air conditioner operates in the refrigeration state, the rotation speed value of the fan is reduced to make the temperature value of the indoor heat exchanger reach a third preset temperature, and when the temperature value of the indoor heat exchanger reaches the third preset temperature, the humidifying device is turned off, and the air conditioner is controlled to operate in the heating state; The third preset temperature is a temperature value that can make the airflow in the air duct frost.

3. The self-cleaning control method of claim 2, wherein, When the air conditioner operates in the refrigeration state, the rotation speed value of the fan is reduced to make the temperature value of the indoor heat exchanger reach a third preset temperature, including: The fan is controlled to reduce the speed in the first stage, and when the temperature of the indoor heat exchanger reaches a first preset temperature, the fan is controlled to operate at the current speed for a first preset time; After the fan operates for the first preset time, the fan is controlled to reduce the speed in the second stage, and when the temperature of the indoor heat exchanger reaches a second preset temperature, the fan is controlled to operate at the current speed for a second preset time; After the fan operates for the second preset time, the fan is controlled to reduce the 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 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 of claim 3, wherein, When the indoor heat exchanger operates in the heating state, the fan that is turned off due to meeting the third preset temperature value is turned on again; The temperature value of the indoor heat exchanger is obtained, and when the temperature value of the indoor heat exchanger reaches a fourth preset temperature, the fan that is turned on again is turned 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 operates in the heating state, the fan that is turned off is turned on again, including: The fan that is turned off is controlled to be turned on and operated at the lowest wind resistance; The minimum wind barrier rotating speed of the fan is between 300 r / min and 350 r / min.

6. The self-cleaning control method of claim 1, wherein, The self-cleaning control method further comprises: When the air conditioner continuously operates in the cooling mode for a third preset time length or the time length of the air conditioner operating in the cooling mode accumulates to a fourth preset time length, the air conditioner is controlled to execute the self-cleaning mode; The control method further comprises: When the air conditioner executes the self-cleaning mode, the air outlet of the air conditioner communicating with the external environment is closed.

7. A cabinet-type air conditioner, characterized by comprising: The air conditioner is provided with an upper air outlet, a lower air outlet, an air duct communicating with the upper air outlet and the lower air outlet, an indoor heat exchanger, a flow path control mechanism, an upper fan, a lower fan and a humidifying device providing humidification for the air duct. The upper fan and the lower fan are correspondingly arranged with the upper air outlet and the 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 in different operating modes of the air conditioner. When the air conditioner is in the cooling mode, the flow path control mechanism controls the air duct to form a first flow path communicating 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 in the first flow path from the lower air outlet to the upper air outlet. When the air conditioner is in the heating mode, the flow path control mechanism controls the air duct to form a second flow path communicating 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 in the second flow path from the upper air outlet to the lower air outlet. 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 communicating the first end and the tail end inside the air conditioner, and the upper fan or the lower fan is used to provide power for the air flow 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 of any one of claims 1-6.

8. The cabinet air conditioner according to claim 7, characterized in that, The air conditioner comprises: A cabinet, the upper part of the cabinet is provided with the upper air outlet, and the lower part of the cabinet is provided with the lower air outlet; A fan, the fan comprises the upper fan arranged in the upper fan air duct and the lower fan arranged in the lower fan air duct, the upper fan has an upper fan air inlet communicating with the cabinet cavity, and the lower fan has a lower fan air inlet communicating with the cabinet cavity; An indoor heat exchanger, the indoor heat exchanger is arranged in the cabinet cavity and opposite to the fan air inlets in the air duct components; 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 operates in the single upper air-out cooling mode, the upper fan and the lower fan are controlled to be turned on, the upper flow path control mechanism is controlled to connect the upper air supply duct and the upper fan air-out end while closing the upper air return port, and the lower flow path control mechanism is controlled to disconnect the lower air supply duct and the lower fan air-out end while opening the lower air return port. The air outside the cabinet flows into the cabinet cavity through the lower air inlet and the lower air return port in sequence. Part of the air flowing into the cabinet cavity is sucked into the lower fan, and the other part of the air is sucked into the upper fan. The air sucked into the lower fan flows through the intermediate air supply duct and the upper air supply duct in sequence and is discharged from the upper air inlet to the outside of the cabinet. The air sucked into the upper fan flows through the upper air supply duct and is discharged from the upper air inlet to the outside of the cabinet. Thus, when the air conditioner operates in the single upper air-out cooling mode, a first flow path is formed in the air conditioner, in which air flows into the air conditioner through the lower air inlet and flows out of the air conditioner through the upper air inlet. When the air conditioner operates in the single lower air-out heating mode, the upper fan and the lower fan are controlled to be turned on, the upper flow path control mechanism is controlled to disconnect the upper air supply duct and the upper fan air-out end while opening the upper air return port, and the lower flow path control mechanism is controlled to connect the lower air supply duct and the lower fan air-out end while closing the lower air return port. The air outside the cabinet flows into the cabinet cavity through the upper air inlet and the upper air return port in sequence. Part of the air flowing into the cabinet cavity is sucked into the upper fan, and the other part of the air is sucked into the lower fan. The air sucked into the upper fan flows through the intermediate air supply duct and the lower air supply duct in sequence and is discharged from the lower air inlet to the outside of the cabinet. The air sucked into the lower fan flows through the lower air supply duct and is discharged from the lower air inlet to the outside of the cabinet. Thus, when the air conditioner operates in the single lower air-out heating mode, a second flow path is formed in the air conditioner, in which air flows into the air conditioner through the upper air inlet and flows out of the air conditioner through the lower air inlet. When the air conditioner operates in the self-cleaning mode, one of the upper fan and the lower fan is controlled to be turned on, and the other fan is controlled to be turned off. The upper flow path control mechanism is controlled to disconnect the upper air supply duct and the upper fan air-out end while opening the upper air return port, and the lower flow path control mechanism is controlled to disconnect the lower air supply duct and the lower fan air-out end while opening the lower air return port. The air in the cabinet cavity is sucked into the fan that is turned on and flows into the fan that is turned off through the intermediate air supply duct, and then returns to the cabinet cavity through the air inlet of the fan that is turned off. Thus, when the air conditioner operates in the self-cleaning mode, a third flow path is formed in the air conditioner, in which air flows in a circulating manner. The air conditioner further comprises a humidifying device, which is used to provide humidification for the air in the air supply duct when the air conditioner operates in the single upper air-out cooling mode, the single lower air-out heating mode, or the self-cleaning mode.

9. The cabinet-type air conditioner according to claim 8, wherein The air duct component comprises opposite air duct component A side and air duct component B side in the axial direction of the fan. A ventilation port is formed in the air duct component, which penetrates the air duct component A side and the air duct component B side and connects the cabinet cavity. The humidifying device is arranged in the ventilation port.

10. The cabinet air conditioner according to claim 8 or 9, characterized in that, The upper air supply duct has an upper air supply duct A side close to the upper fan side and an upper air supply duct B side close to the upper air outlet side, and the upper air supply duct comprises a first upper air supply duct and a second upper air supply duct which are separated at the upper air supply duct A side and communicated at the upper air supply duct B side; The lower air supply duct has a lower air supply duct A side close to the lower fan side and a lower air supply duct B side close to the lower air outlet side, and the lower air supply duct comprises a first lower air supply duct and a second lower air supply duct which are separated at the lower air supply duct A side and communicated at the lower air supply duct B side; The upper flow path control mechanism comprises an upper baffle mechanism rotatably arranged at the upper fan air outlet end and the first upper air supply duct communication position, and an upper volute tongue mechanism capable of circumferentially sliding around the preset rotation axis of the upper fan, 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 located at the first upper rotation position, the upper return air outlet is opened while the communication between the upper fan air outlet end and the first upper air supply duct is blocked, when the upper baffle mechanism is located at the second upper rotation position, the upper return air outlet is closed while the upper fan air outlet end and the first upper air supply duct are communicated, when the upper volute tongue mechanism is located at the first upper sliding position, the upper fan air outlet end is kept in communication with the intermediate air duct while the communication between the upper fan air outlet end and the second upper air supply duct is blocked, and when the upper volute tongue mechanism is located at the second upper sliding position, the upper fan air outlet end is communicated with the second upper air supply duct while the communication between the upper fan air outlet end and the intermediate air duct is blocked. The lower flow path control mechanism comprises a lower baffle mechanism rotatably arranged at the lower fan air outlet end and the first lower air supply duct communication position, and a lower volute tongue mechanism capable of circumferentially sliding around the 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 located at the first lower rotation position, the lower return air outlet is opened while the communication between the lower fan air outlet end and the first lower air supply duct is blocked, when the lower baffle mechanism is located at the second lower rotation position, the lower return air outlet is closed while the lower fan air outlet end and the first lower air supply duct are communicated, when the lower volute tongue mechanism is located at the first lower sliding position, the lower fan air outlet end is kept in communication with the intermediate air duct while the communication between the lower fan air outlet end and the second lower air supply duct is blocked, and when the lower volute tongue mechanism is located at the second sliding position, the lower fan air outlet end is communicated with the second lower air supply duct while the communication between the lower fan air outlet end and the intermediate air duct is blocked.

11. The cabinet-type air conditioner according to claim 8 or 9, wherein The indoor heat exchanger comprises an upper heat exchange part opposite to the upper fan axial air inlet and a lower heat exchange part opposite to the lower fan axial air inlet; The upper heat exchange part and the lower heat exchange part constitute V-shaped heat exchange members with notches facing the air duct part side.

12. The cabinet-type air conditioner according to claim 8 or 9, wherein The upper air outlet and the lower air outlet can be controlled to be opened or closed. When the air conditioner runs in the self-cleaning mode, the upper air outlet and the lower air outlet are controlled to be closed.

13. The cabinet-type air conditioner according to claim 8 or 9, wherein The upper part of the cabinet is provided with an upper auxiliary air inlet which can be controlled to be opened or closed, and the lower part of the cabinet is provided with a lower auxiliary air inlet which can be controlled to be opened or closed. When the air conditioner runs in the self-cleaning mode, the upper air outlet, the lower air outlet, the upper auxiliary air inlet and the lower auxiliary air inlet are controlled to be closed.

14. The cabinet-type air conditioner according to claim 8 or 9, wherein The upper air fan and the lower air fan are both centrifugal fans, and the rotation directions of the upper air fan and the lower air fan are opposite.

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