Air conditioner and control method and control device thereof

Abstract

The invention discloses an air conditioner and a control method and device thereof, an indoor unit comprises a machine shell, a centrifugal fan, an evaporator and a cleaning assembly, the machine shell is provided with an air inlet, an air outlet and an air channel, the evaporator is located between a volute assembly and the air outlet on the air channel, and the cleaning assembly comprises a cleaning part. The cleaning part has a moving stroke for entering and exiting the volute from an outlet of the volute, the cleaning part has a first position which is located in the volute and makes contact with the to-be-cleaned face of the wind wheel, the cleaning part can move relative to the to-be-cleaned face of the wind wheel, and the cleaning part further has a second position located outside the volute. The surface of the evaporator is frosted; when the cleaning piece is located at the first position, the first motor is controlled to drive the wind wheel to rotate; the air conditioner is controlled to operate in the heating mode, so that flowing condensate water is formed on the surface of the evaporator, dust removal of the wind wheel is more convenient, the cleaning effect is good, the cleaning assembly is low in arrangement cost, and the function of the volute assembly is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to an air conditioner and a control method and a control device thereof. Background Art

[0002] After the air conditioner has been used for a period of time, dust will generally accumulate on the surface of the impeller. The dust adsorbed on the impeller will affect its working efficiency, resulting in a decrease in the air volume of the entire machine, increased energy consumption, and polluting the air inside the air conditioner, reducing the quality of the air output. Therefore, regular cleaning is required. Disassembling and cleaning the impeller is time-consuming and labor-intensive, and may also damage the air conditioner components, which is very inconvenient. Summary of the Invention

[0003] The main purpose of the present invention is to provide an air conditioner and its control method and control device, aiming to make the dust removal of the wind wheel more convenient and the cleaning effect better, and the setting cost of the cleaning component is low, thereby ensuring the function of the volute component.

[0004] To achieve the above-mentioned object, the present invention provides a control method for an air conditioner, wherein the air conditioner includes an indoor unit, the indoor unit includes a casing, a centrifugal fan, an evaporator, and a cleaning component, the casing having an air inlet, an air outlet, and an air duct located between the air inlet and the air outlet, the centrifugal fan including a volute assembly and a first motor, the volute assembly including a wind wheel and a volute accommodating the wind wheel, the first motor driving the wind wheel to rotate, the volute assembly, the evaporator, and the cleaning component are arranged in the casing, and on the air duct, the evaporator is located between the volute assembly and the air outlet, the cleaning component includes a cleaning member, the cleaning member has a movable stroke entering and exiting the volute from the outlet of the volute, the cleaning member has a first position located in the volute in contact with a surface to be cleaned of the wind wheel and is movable relative to the surface to be cleaned of the wind wheel, the cleaning member also has a second position located outside the volute, and the control method of the indoor unit comprises:

[0005] Controlling the air conditioner to operate in a cooling mode so that frost forms on the surface of the evaporator;

[0006] When the cleaning element is in the first position, controlling the first motor to drive the wind wheel to rotate;

[0007] The air conditioner is controlled to operate in a heating mode so that flowing condensed water forms on the surface of the evaporator.

[0008] Optionally, when the cleaning member is in the first position, the step of controlling the first motor to drive the wind wheel to rotate includes: when the cleaning member is in the first position, controlling the first motor to drive the wind wheel to rotate at a first speed;

[0009] After the step of controlling the first motor to drive the fan wheel to rotate at a first speed when the cleaning member is in the first position, the air conditioner control method further comprises: controlling the first motor to drive the fan wheel to rotate at a second speed when the cleaning member is in the second position;

[0010] Wherein, the first rotational speed is less than the second rotational speed.

[0011] Optionally, the indoor unit includes a driving device for driving the cleaning member to move, and when the cleaning member is in the second position, before the step of controlling the first motor to drive the impeller to rotate at the second speed, the air conditioner control method further includes:

[0012] The driving device is controlled to drive the cleaning element to move from the first position to the second position.

[0013] Optionally, after the step of controlling the air conditioner to operate in a heating mode so that flowing condensed water forms on the surface of the evaporator, the air conditioner control method further comprises the steps of:

[0014] The air conditioner is controlled to operate in a heating mode so that the surface of the evaporator is dried and reaches a preset temperature.

[0015] The present invention also provides an air conditioner control device, comprising a memory, a processor, and an air conditioner control program stored in the memory, wherein the processor executes the air conditioner control program to implement the steps of any one of the air conditioner control methods described above.

[0016] The present invention also provides an air conditioner, which includes an indoor unit, and the indoor unit includes a casing, a centrifugal fan, an evaporator, and a cleaning component. The casing has an air inlet, an air outlet, and an air duct located between the air inlet and the air outlet. The centrifugal fan includes a volute assembly and a first motor. The volute assembly includes a wind wheel and a volute for accommodating the wind wheel. The first motor drives the wind wheel to rotate. The volute assembly, the evaporator, and the cleaning component are arranged in the casing, and on the air duct, the evaporator is located between the volute assembly and the air outlet. The cleaning component includes a cleaning member, which has a movable stroke from the outlet of the volute to the volute, the cleaning member has a first position in the volute that contacts the surface to be cleaned of the wind wheel and is movable relative to the surface to be cleaned of the wind wheel. The cleaning member also has a second position outside the volute, and the control device includes the control device as described above.

[0017] Optionally, the cleaning assembly further includes a swing arm, and the air conditioner further includes a driving device for driving the swing arm to swing, and the swing arm is connected to the cleaning member to drive the cleaning member to swing so that the cleaning member has the first position and the second position.

[0018] Optionally, the side wall of one end of the swing arm and one end of the cleaning member are rotatably matched.

[0019] Optionally, the centrifugal fan includes two volutes and two wind wheels respectively accommodated in the two volutes;

[0020] Two cleaning assemblies are provided, each of which includes two swing arms, the side walls of one end of the two swing arms are respectively connected to the two ends of the cleaning member, and the side walls of the other ends of the two swing arms are respectively provided with a first rotating shaft and a second rotating shaft in a direction away from each other, and the first rotating shaft is rotatably connected to the inner side of the housing;

[0021] The driving device includes a driving gear and a driven gear meshing with each other, and a second motor driving the driving gear to rotate. The driven gear is connected to the two second rotating shafts of the two groups of cleaning components on opposite sides of its axial direction.

[0022] Optionally, the air conditioner includes a ducted air conditioner.

[0023] In the technical solution of the present invention, the control method of the indoor unit includes: controlling the air conditioner to operate in a cooling mode so that frost forms on the surface of the evaporator; when the cleaning member is in a first position, controlling the first motor to drive the wind wheel to rotate; controlling the air conditioner to operate in a heating mode so that flowing condensed water forms on the surface of the evaporator. That is, in the technical solution of the present application, the cleaning member enters and exits the volute from the outlet of the volute, and there is no need to modify the volute. The cleaning component can be added to the original model, with low production cost and little impact on the function of the volute component. When it is necessary to remove dust from the wind wheel, the air conditioner is controlled to cool so that frost forms on the surface of the evaporator. When the cleaning member is in the first position, the first motor is controlled to drive the wind wheel to rotate so that the cleaning member is relatively The surface to be cleaned of the wind wheel is moved so that the accumulated dust on the surface to be cleaned of the wind wheel falls off. Since the evaporator is located between the wind wheel and the air outlet on the air duct, and the gaps between the fins of the evaporator are covered with frost, the fallen dust cannot pass through the gaps between the fins when it reaches the evaporator, and will be intercepted by the evaporator, reducing the discharge of dust from the air outlet during the operation of the cleaning part, controlling the heating of the air conditioner, and the frost layer on the surface of the evaporator melts to form flowing condensed water. The intercepted dust is discharged from the indoor unit along with the condensed water, completing the dust removal of the wind wheel. There is no need to disassemble and clean the wind wheel. During dust removal, the evaporator will not be polluted and dust is not easy to escape, making the wind wheel dust removal more convenient and the cleaning effect better. The setting cost of the cleaning component is low, ensuring the function of the volute component. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0025] Figure 1 This is a schematic exploded view of the structure of an embodiment of the indoor unit provided by the present invention;

[0026] Figure 2 for Figure 1 A three-dimensional schematic diagram of the structure of the indoor unit;

[0027] Figure 3 for Figure 1 Schematic diagram of the structure of the indoor unit (cleaning parts working);

[0028] Figure 4 for Figure 1Schematic diagram of the indoor unit structure (cleaning parts are not working);

[0029] Figure 5 for Figure 1 A schematic structural diagram of the volute assembly, cleaning assembly, drive device and mounting structure;

[0030] Figure 6 for Figure 5 An exploded schematic diagram of the volute assembly, cleaning assembly, drive device and mounting structure;

[0031] Figure 7 for Figure 5 An exploded schematic diagram of the cleaning assembly, drive unit, and mounting structure;

[0032] Figure 8 for Figure 6 A schematic cross-sectional view of the cleaning assembly, drive device and mounting structure;

[0033] Figure 9 A schematic flow chart of the steps of a first embodiment of a method for controlling an indoor unit provided by the present invention;

[0034] Figure 10 A schematic flow chart of the steps of a second embodiment of the indoor unit control method provided by the present invention;

[0035] Figure 11 A schematic flow chart of the steps of a third embodiment of a method for controlling an indoor unit provided by the present invention;

[0036] Figure 12 This is a schematic flow chart of the steps of the fourth embodiment of the indoor unit control method provided by the present invention.

[0037] Description of Figure Numbers:

[0038]

[0039]

[0040] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0042] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0043] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0044] After the air conditioner has been used for a period of time, dust will generally accumulate on the surface of the impeller. The dust adsorbed on the impeller will affect its working efficiency, resulting in a decrease in the air volume of the entire machine, increased energy consumption, and polluting the air inside the air conditioner, reducing the quality of the air output. Therefore, regular cleaning is required. Disassembling and cleaning the impeller is time-consuming and labor-intensive, and may also damage the air conditioner components, which is very inconvenient.

[0045] In view of this, the present invention provides an air conditioner and a control method and a control device thereof, which aim to make dust removal of the wind wheel more convenient, improve the cleaning effect, and reduce the cost of setting up the cleaning component, thereby ensuring the function of the volute component. Figures 1 to 8 This is an embodiment of the air conditioner provided by the present invention.

[0046] It should be noted that the present invention does not specifically limit the type of the air conditioner. The air conditioner includes a wall-mounted air conditioner, a cabinet air conditioner, a duct air conditioner, etc. The air conditioner is illustrated as a duct air conditioner in the accompanying drawings.

[0047] In an embodiment of the present invention, referring to the accompanying drawings, the air conditioner includes an indoor unit 100, which includes a casing 1, a centrifugal fan 2, an evaporator 3, and a cleaning component 4. The casing 1 has an air inlet 11, an air outlet 12, and an air duct between the air inlet 11 and the air outlet 12. The centrifugal fan 2 includes a volute assembly 21 and a first motor. The volute assembly 21 includes a wind wheel 211 and a volute 212 for accommodating the wind wheel 211. The first motor drives the wind wheel 211 to rotate. The volute assembly 21, the evaporator 3, and the cleaning component 4 are arranged in the casing 1, and on the air duct, the evaporator 3 is located between the volute assembly 21 and the air outlet 12. The cleaning component 4 includes a cleaning member 41, the cleaning member 41 has a movable stroke for entering and exiting the volute 212 from the outlet of the volute 212, and the cleaning member 41 has a position in the volute 212 and a contact with the wind wheel 211. The cleaning member 41 is in a first position in contact with the surface to be cleaned and can move relative to the surface to be cleaned of the wind wheel 211. The cleaning member 41 also has a second position located outside the volute 212. The cleaning member 41 enters and exits the volute 212 from the outlet of the volute 212. There is no need to modify the volute 212. The cleaning component 4 can be added to the original model. The production cost is low and the function of the volute component 21 is small. When the cleaning member 41 is in the first position, the first motor is controlled to drive the wind wheel 211 to rotate, so that the cleaning member 41 moves relative to the surface to be cleaned of the wind wheel 211, so that the dust accumulated on the surface to be cleaned of the wind wheel 211 falls off, and the dust removal of the wind wheel 211 is realized. After the dust removal is completed, the cleaning member 41 is controlled to be in the second position, which can ensure the normal operation of the volute component 21. There is no need to disassemble and clean the wind wheel 211, which makes the dust removal of the wind wheel 211 more convenient. The setting cost of the cleaning component 4 is low, and the function of the volute component 21 is ensured.

[0048] It should be noted that the present application does not limit the surface to be cleaned of the wind wheel 211. The surface to be cleaned can be any surface of the wind wheel 211. It can be understood that since dust easily accumulates on the peripheral side surface of the wind wheel 211 of the centrifugal fan 2, the surface to be cleaned at least includes the peripheral side surface of the wind wheel 211 to ensure the overall cleaning effect of the wind wheel 211.

[0049] In one embodiment, the control device includes a memory, a processor, and an air conditioner control program stored in the memory, and the processor executes the air conditioner control program to implement the following steps of the air conditioner control method:

[0050] Controlling the air conditioner to operate in a cooling mode so that frost forms on the surface of the evaporator 3;

[0051] When the cleaning member 41 is in the first position, the first motor is controlled to drive the wind wheel 211 to rotate;

[0052] The air conditioner is controlled to operate in a heating mode so that flowing condensed water forms on the surface of the evaporator 3 .

[0053] Optionally, when the cleaning member 41 is in the first position, the step of controlling the first motor to drive the wind wheel 211 to rotate includes: when the cleaning member 41 is in the first position, controlling the first motor to drive the wind wheel 211 to rotate at a first speed;

[0054] After the step of controlling the first motor to drive the wind wheel 211 to rotate at a first speed when the cleaning member 41 is in the first position, the air conditioner control method further includes: controlling the first motor to drive the wind wheel 211 to rotate at a second speed when the cleaning member 41 is in the second position;

[0055] Wherein, the first rotational speed is less than the second rotational speed.

[0056] Optionally, the indoor unit 100 includes a driving device 5 for driving the cleaning member 41 to move. When the cleaning member 41 is in the second position, before the step of controlling the first motor to drive the wind wheel 211 to rotate at the second speed, the air conditioner control method further includes:

[0057] The driving device 5 is controlled to drive the cleaning member 41 to move from the first position to the second position.

[0058] Optionally, after the step of controlling the air conditioner to operate in a heating mode so that flowing condensed water forms on the surface of the evaporator 3, the air conditioner control method further comprises the steps of:

[0059] The air conditioner is controlled to operate in a heating mode so that the surface of the evaporator 3 is dry and reaches a preset temperature.

[0060] The present application does not make any specific limitation on the movable stroke of the cleaning member 41 to achieve the entry and exit of the volute 212 from the inlet and outlet of the volute 212. The cleaning member 41 can be an integral translation from the outlet of the volute 212 to enter and exit the volute 212. In one embodiment, the cleaning assembly 4 also includes a swing arm 42, and the air conditioner also includes a driving device 5 to drive the swing arm 42 to swing. The swing arm 42 is connected to the cleaning member 41, driving the cleaning member 41 to swing, so that the cleaning member 41 has the first position and the second position. The swing of the cleaning member 41 realizes the switching between the first position and the second position, which not only enables the cleaning member to enter and exit the outlet of the volute 212, but also changes the position of the cleaning member 41 on the cross-section of the outlet of the volute 212. Therefore, while the structure is simple, the second position can be moved away from the outlet of the volute 212 to avoid affecting the air outlet of the volute 212, thereby ensuring the function of the volute assembly 21. Specifically, see Figure 4 The swing arm 42 swings so that the cleaning member 41 has a second position close to the top cover 13 of the housing 1, and the cleaning member 41 is away from the outlet of the volute 212 to avoid affecting the air outlet of the volute 212.

[0061] The present application does not specifically limit the connection method between the swing arm 42 and the cleaning member 41. The swing arm 42 and the cleaning member 41 can be fixedly connected. In one embodiment, the side wall of one end of the swing arm 42 and one end of the cleaning member 41 are rotatably matched, so that the cleaning member 41 can be passively rotated under the drive of the wind wheel 211. The cleaning member 41 and the surface to be cleaned of the wind wheel 211 have rolling friction, and the cleaning pressure is more uniform, thereby reducing the risk of scratches between the cleaning member 41 and the wind wheel 211.

[0062] In one embodiment, the centrifugal fan 2 includes two volutes 212 and two wind wheels 211 respectively accommodated in the two volutes 212; there are two corresponding cleaning components 4, each of which includes two swing arms 42, and the side walls of one end of the two swing arms 42 are respectively connected to the two ends of the cleaning member 41, and the side walls of the other ends of the two swing arms 42 are respectively protruded with a first rotating shaft 421 and a second rotating shaft 422 in directions away from each other, and the first rotating shaft 421 is rotatably connected to the inner side of the casing 1; the driving device 5 includes a driving gear 52 and a driven gear 53 that mesh with each other, and a second motor 51 that drives the driving gear 52 to rotate, and the driven gear 53 is respectively connected to the two second rotating shafts 422 of the two groups of cleaning components 4 on opposite sides of its axial direction. In this way, the swing arms 42 of the two groups of cleaning components 4 are driven to swing by one second motor 51, thereby driving the two cleaning members 41 to swing, thereby streamlining the structure and reducing production and use costs.

[0063] The main improvement of the present application lies in the setting of the cleaning component 4 and the control method of the air conditioner. The specific structure of the casing 1 is not limited. In a specific embodiment, the casing 1 includes a top cover 13 and a chassis component 14, which are manufactured separately and then assembled to form the casing 1, reducing the difficulty of production and manufacturing. In a specific embodiment, the indoor unit 100 includes a volute fixing plate 6. In order to facilitate the installation of the cleaning component 4 and the driving device 5, the volute fixing plate 6 is provided with two first fixing holes 61 and a second fixing hole 62. The indoor unit 100 also includes a mounting structure 7. The mounting structure 7 includes two mounting brackets 72 and a mounting seat 71. The two mounting brackets 72 are respectively engaged with the two first fixing holes 61. The mounting seat 71 is installed on the volute fixing plate 6 through the second fixing hole 62. The two first rotating shafts 421 of the two groups of the cleaning components 4 are respectively rotatably installed on the two mounting brackets 72. The free end of the second rotating shaft 422 is provided with a connecting cylinder 4221. The two ends of the cleaning member 41 are provided with a third fixing hole 411. The two The side walls of the swing arm 42 corresponding to one end of the cleaning member 41 are each protruding with a third rotating shaft 423, and the two third rotating shafts 423 are respectively rotatably engaged with the two third fixing holes 411, and the mounting base 71 includes a base 711 and a cover body 712, and the base 711 and the cover body 712 define a space for installing the driving gear 52 and the driven gear 53, and the driving shaft of the second motor 51 is inserted into the base 711 and connected to the rotating shaft of the driving gear 52, driving the driving gear 52 to rotate, driving the driven gear 53 to rotate, and the two ends of the rotating shaft of the driven gear 53 are respectively inserted into the two connecting cylinders 4221 to connect with the two second rotating shafts 422 to drive the two second rotating shafts 422 to rotate, thereby driving the swing arm 42 to rotate.

[0064] The present application does not limit the specific structure and material of the cleaning member 41. Specifically, the cleaning member 41 is configured to produce elastic deformation so that when the cleaning member 41 is in the first position, there is a certain amount of extrusion between the cleaning member 41 and the wind wheel 211, so as to ensure that when the cleaning member 41 moves relative to the surface to be cleaned of the wind wheel 211, the cleaning member 41 can always maintain contact with the wind wheel 211 to ensure the dust removal effect. The cleaning member 41 can be various types of brushes, such as a bristle brush, a nylon brush, etc., and the cleaning member 41 can also be a block such as a sponge or rubber.

[0065] The present invention also provides a control method for an air conditioner, wherein the air conditioner includes an indoor unit 100, the indoor unit 100 includes a housing 1, an air inlet 11, an air outlet 12, and an air duct between the air inlet 11 and the air outlet 12, the centrifugal fan 2 includes a volute assembly 21 and a first motor, the volute assembly 21 includes a wind wheel 211 and a volute 212 accommodating the wind wheel 211, the first motor drives the wind wheel 211 to rotate, the volute assembly 21, the evaporator 3, and the cleaning component 4 The cleaning assembly 4 is provided in the housing 1, and on the air duct, the evaporator 3 is located between the volute assembly 21 and the air outlet 12, the cleaning assembly 4 includes a cleaning member 41, the cleaning member 41 has a movable stroke of entering and exiting the volute 212 from the outlet of the volute 212, the cleaning member 41 has a first position located in the volute 212 in contact with the surface to be cleaned of the wind wheel 211 and can move relative to the surface to be cleaned of the wind wheel 211, the cleaning member 41 also has a second position located outside the volute 212, and the control method of the indoor unit 100 includes:

[0066] S10: Controlling the air conditioner to operate in a cooling mode so that frost forms on the surface of the evaporator 3;

[0067] S20: When the cleaning member 41 is in the first position, controlling the first motor to drive the wind wheel 211 to rotate;

[0068] S50: Control the air conditioner to operate in a heating mode so that flowing condensed water forms on the surface of the evaporator 3 .

[0069] In this embodiment, the control method of the indoor unit 100 includes: controlling the air conditioner to operate in a cooling mode so that frost forms on the surface of the evaporator 3; when the cleaning member 41 is in the first position, controlling the first motor to drive the wind wheel 211 to rotate; controlling the air conditioner to operate in a heating mode so that flowing condensed water forms on the surface of the evaporator 3, that is, in the technical solution of the present application, the cleaning member 41 enters and exits the volute 212 from the outlet of the volute 212, and there is no need to modify the volute 212. The cleaning component 4 can be added to the original model, which has low production cost and little impact on the function of the volute component 21. When it is necessary to remove dust from the wind wheel 211, the air conditioner is controlled to cool so that frost forms on the surface of the evaporator 3. When the cleaning member 41 is in the first position, the first motor is controlled to drive the wind wheel 211 to rotate so that the cleaning member 41 moves relative to the The surface to be cleaned of the wind wheel 211 moves, so that the dust accumulated on the surface to be cleaned of the wind wheel 211 falls off. Since the evaporator 3 is located between the wind wheel 211 and the air outlet 12 on the air duct, and the gaps between the fins of the evaporator 3 are covered with frost, the fallen dust cannot pass through the gaps between the fins when it reaches the evaporator 3, and will be intercepted by the evaporator 3, reducing the discharge of dust from the air outlet 12 during the operation of the cleaning member 41, controlling the heating of the air conditioner, and the frost layer on the surface of the evaporator 3 melts to form flowing condensed water. The intercepted dust is discharged from the indoor unit 100 along with the condensed water, completing the dust removal of the wind wheel 211. There is no need to disassemble and clean the wind wheel 211. During dust removal, the evaporator 3 will not be polluted, and dust is not easy to escape, making dust removal of the wind wheel 211 more convenient and the cleaning effect better. The setting cost of the cleaning component 4 is low, ensuring the function of the volute component 21.

[0070] It should be noted that the present application does not limit how the condensed water from the surface of the evaporator 3 is discharged from the indoor unit 100. In a specific embodiment, a water receiving tray 8 is provided under the evaporator 3, and the water receiving tray 8 is provided with a drain outlet 81. The condensed water on the surface of the evaporator 3 flows into the water receiving tray 8 with dust and is finally discharged from the drain outlet 81.

[0071] In one embodiment, when the cleaning member 41 is in the first position, step S20 of controlling the first motor to drive the wind wheel 211 to rotate includes:

[0072] S21: When the cleaning member 41 is in the first position, controlling the first motor to drive the wind wheel 211 to rotate at a first speed;

[0073] After step S21 of controlling the first motor to drive the wind wheel 211 to rotate at a first speed when the cleaning member 41 is in the first position, the air conditioner control method further includes:

[0074] S40: When the cleaning member 41 is in the second position, controlling the first motor to drive the wind wheel 211 to rotate at a second speed;

[0075] Wherein, the first rotational speed is less than the second rotational speed.

[0076] In this embodiment, the first rotational speed is lower than the second rotational speed, that is, when the cleaning member 41 is in the first position, the first motor is controlled to drive the wind wheel 211 to rotate at a lower rotational speed. At this time, the cleaning member 41 moves relative to the surface to be cleaned of the wind wheel 211, and the wind wheel 211 rotates at a lower rotational speed, which can reduce the risk of wear between the wind wheel 211 and the cleaning member 41 while allowing the dust on the surface to be cleaned to fall off. When the cleaning member 41 is in the second position, the first motor is controlled to drive the wind wheel 211 to rotate at a higher rotational speed, forming a high-speed airflow to blow the fallen dust to the evaporator 3, thereby ensuring the cleaning effect.

[0077] Specifically, the first rotational speed is 8 rpm-14 rpm (inclusive), and the wind wheel 211 rotates relatively slowly, reducing the risk of wear between the wind wheel 211 and the cleaning member 41. The wind wheel 211 is controlled to rotate at the first rotational speed for a first preset time according to the first rotational speed. The first preset time is, for example, 1 minute, so that the wind wheel 211 can rotate 8-14 times, a sufficient number of times to ensure that the cleaning member 41 brushes the surface to be cleaned of the wind wheel 211 enough times, thereby ensuring the cleaning effect. Taking the surface to be cleaned of the wind wheel 211 as the peripheral side surface of the wind wheel 211 as an example, when the wind wheel 211 rotates, the cleaning member 41 moves relative to the peripheral side surface of the wind wheel 211. When the wind wheel 211 rotates one circle, the cleaning member 41 completes one brushing of the peripheral side surface of the wind wheel 211.

[0078] The switching of the cleaning member 41 between the first position and the second position can be completed by manual driving. In one embodiment, the indoor unit 100 includes a driving device 5 for driving the cleaning member 41. When the cleaning member 41 is in the second position, before step S40 of controlling the first motor to drive the impeller 211 to rotate at the second speed, the air conditioner control method further includes:

[0079] S30: Control the driving device 5 to drive the cleaning member 41 to move from the first position to the second position.

[0080] In this embodiment, without manual operation, the driving device 5 is controlled to drive the cleaning member 41 to move from the first position to the second position, thereby realizing the automation of the position switching of the cleaning member 41 and improving the dust removal efficiency.

[0081] In one embodiment, after the step of controlling the air conditioner to operate in a heating mode so that flowing condensed water forms on the surface of the evaporator 3, the air conditioner control method further comprises the steps of:

[0082] S60: Control the air conditioner to operate in a heating mode so that the surface of the evaporator 3 is dry and reaches a preset temperature.

[0083] In this embodiment, the air conditioner is controlled to operate in heating mode so that the surface of the evaporator 3 is dried and reaches a preset temperature, which can form a high-temperature environment on the surface of the evaporator 3 and achieve the purpose of inactivating microorganisms such as bacteria and fungi on the surface of the heat exchanger, thereby realizing overall automatic cleaning of the indoor unit 100.

[0084] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. All equivalent structural transformations made based on the contents of the present invention's description and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A method for controlling an air conditioner, characterized in that: The air conditioner includes an indoor unit, the indoor unit including a casing, a centrifugal fan, an evaporator, and a cleaning component, the casing having an air inlet, an air outlet, and an air duct located between the air inlet and the air outlet, the centrifugal fan including a volute assembly and a first motor, the volute assembly including a wind wheel and a volute accommodating the wind wheel, the first motor driving the wind wheel to rotate, the volute assembly, the evaporator, and the cleaning component are arranged in the casing, and on the air duct, the evaporator is located between the volute assembly and the air outlet, the cleaning component including a cleaning member, the cleaning member having a movable stroke entering and exiting the volute from the outlet of the volute, the cleaning member having a first position located in the volute in contact with a surface to be cleaned of the wind wheel and being movable relative to the surface to be cleaned of the wind wheel, the cleaning member also having a second position located outside the volute, and the control method of the indoor unit comprising: Controlling the air conditioner to operate in a cooling mode so that frost forms on the surface of the evaporator; When the cleaning element is in the first position, controlling the first motor to drive the wind wheel to rotate; The air conditioner is controlled to operate in a heating mode so that flowing condensed water forms on the surface of the evaporator.

2. The air conditioner control method according to claim 1, wherein: When the cleaning member is in the first position, the step of controlling the first motor to drive the wind wheel to rotate comprises: when the cleaning member is in the first position, controlling the first motor to drive the wind wheel to rotate at a first speed; After the step of controlling the first motor to drive the fan wheel to rotate at a first speed when the cleaning member is in the first position, the air conditioner control method further comprises: controlling the first motor to drive the fan wheel to rotate at a second speed when the cleaning member is in the second position; Wherein, the first rotational speed is less than the second rotational speed.

3. The air conditioner control method according to claim 2, wherein: The indoor unit includes a driving device for driving the cleaning member to move. When the cleaning member is in the second position, before the step of controlling the first motor to drive the impeller to rotate at a second speed, the air conditioner control method further includes: The driving device is controlled to drive the cleaning element to move from the first position to the second position.

4. The air conditioner control method according to claim 1, wherein: After the step of controlling the air conditioner to operate in a heating mode so that flowing condensed water forms on the surface of the evaporator, the air conditioner control method further comprises the steps of: The air conditioner is controlled to operate in a heating mode so that the surface of the evaporator is dried and reaches a preset temperature.

5. A control device for an air conditioner, characterized in that: The method comprises a memory, a processor and an air conditioner control program stored in the memory, wherein the processor executes the air conditioner control program to implement the steps of the air conditioner control method according to any one of claims 1 to 4.

6. An air conditioner, characterized in that: The air conditioner includes an indoor unit, which includes a casing, a centrifugal fan, an evaporator, and a cleaning component. The casing has an air inlet, an air outlet, and an air duct located between the air inlet and the air outlet. The centrifugal fan includes a volute assembly and a first motor. The volute assembly includes a wind wheel and a volute accommodating the wind wheel. The first motor drives the wind wheel to rotate. The volute assembly, the evaporator, and the cleaning component are arranged in the casing, and on the air duct, the evaporator is located between the volute assembly and the air outlet. The cleaning component includes a cleaning member, which has a movable stroke from the outlet of the volute in and out of the volute. The cleaning member has a first position in the volute in contact with the surface to be cleaned of the wind wheel and can move relative to the surface to be cleaned of the wind wheel. The cleaning member also has a second position outside the volute. The control device includes the control device as claimed in claim 5.

7. The air conditioner according to claim 6, wherein: The cleaning assembly further includes a swing arm, and the air conditioner further includes a driving device for driving the swing arm to swing. The swing arm is connected to the cleaning member to drive the cleaning member to swing so that the cleaning member has the first position and the second position.

8. The air conditioner according to claim 7, wherein: The side wall of one end of the swing arm is rotatably matched with one end of the cleaning member.

9. The air conditioner according to claim 7, wherein: The centrifugal fan includes two volutes and two wind wheels respectively accommodated in the two volutes; Two cleaning assemblies are provided, each of which includes two swing arms, the side walls of one end of the two swing arms are respectively connected to the two ends of the cleaning member, and the side walls of the other ends of the two swing arms are respectively provided with a first rotating shaft and a second rotating shaft in a direction away from each other, and the first rotating shaft is rotatably connected to the inner side of the housing; The driving device includes a driving gear and a driven gear meshing with each other, and a second motor driving the driving gear to rotate. The driven gear is connected to the two second rotating shafts of the two groups of cleaning components on opposite sides of its axial direction.

10. The air conditioner according to any one of claims 6 to 9, characterized in that: The air conditioner includes a duct unit.

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