An air conditioner indoor unit air deflector control method, control system and air conditioner

Abstract

The present invention discloses a control method, a control system and an air conditioner for an indoor unit of an air conditioner. By monitoring the real-time current value of a stepping motor during the process of driving a deflector to rotate, when it is monitored that the real-time current value of the stepping motor is greater than or equal to a preset overstep current limit value T, the stepping motor is controlled to stop rotating and the deflector stops rotating, so as to prevent the generation of overstep sound and avoid waste of electric energy, and solve the problem of easy occurrence of overstep sound.

Description

Technical Field

[0001] The present invention belongs to the technical field of air conditioning, and specifically relates to a control method, a control system and an air conditioner for a deflector of an indoor unit of an air conditioner. Background Art

[0002] Existing indoor units of air conditioners have deflectors and swing blades in various forms, which are driven by stepping motors to control the deflector angle and position to change the indoor air direction. Due to the characteristics of the stepping motor, it needs to be reset every time the air conditioner is turned on and off to ensure that the deflector position is accurate without deviation. However, at the same time, it also causes the problem of overstep sound when the stepping motor drives the deflector to reset. Especially for the existing special-shaped deflectors, super-large deflectors and other structures, larger stepping motors are required for driving, and longer overstep time is needed to ensure the deflector reset, resulting in a long waiting time for the deflector to reset and the problem of overstep sound when the air conditioner is turned on and off.

[0003] By reasonably designing the overstep steps of the stepping motor, it is ensured that the deflector can be fully reset without generating excessive overstep sound. Since the reset steps of the stepping motor set in the system are fixed values, and the deflector position cannot be directly determined during the actual operation of the stepping motor. Refer to Figures 1 to 3 As shown, the indoor unit of the air conditioner includes an indoor heat exchanger 1, an electric auxiliary heating device 2, a cross-flow fan 3, a stepping motor 4, a deflector 5, a housing 6, etc. The housing 6 has an air outlet 6-1; the stepping motor 4 drives the deflector 5 to rotate to open or cover the air outlet 6-1. Figure 1 As shown, the deflector 5 is at the fully open angle A, Figure 2 As shown, the deflector 5 is at the fully closed angle C, Figure 3 The deflector 5 is at the intermediate angle B.

[0004] Suppose that under normal circumstances, the deflector 5 needs the stepping motor 4 to run 1000 steps from angle A to angle C. Generally, 1100 steps or more will be set in the system to ensure that the deflector 5 is fully reset. Therefore, there will be a problem of overstep sound during 100 steps. Suppose angle B is the intermediate position, that is, it normally takes 500 steps from angle B to angle C. If the air conditioner is accidentally powered off and the deflector 5 is just at this position, then when the power is restored again, the deflector 5 needs the stepping motor 4 to run 1100 steps during reset, and there will be 600 steps of overstep reset at this time, resulting in additional power waste and overstep sound problems. Summary of the Invention

[0005] The present invention provides a control method for a deflector of an indoor unit of an air conditioner, which solves the problem of easy occurrence of overstep sound.

[0006] To achieve the above technical purpose, the present invention is realized by adopting the following technical solutions:

[0007] A control method for the air deflector of an indoor unit of an air conditioner, comprising:

[0008] During the process of driving the air deflector to rotate by a stepper motor, monitoring the real-time current value of the stepper motor;

[0009] When it is monitored that the real-time current value of the stepper motor is greater than or equal to the preset over-step current limit value T, controlling the stepper motor to stop rotating.

[0010] In some embodiments of the present application, after the stepper motor stops rotating, the following steps are further included:

[0011] The stepper motor drives the air deflector to rotate a preset angle H in the direction opposite to the original rotation direction. When the actual reverse rotation angle I of the air deflector reaches the preset angle H, the stepper motor stops rotating. Then the stepper motor drives the air deflector to rotate by the angle I in the original rotation direction. When it is monitored that the real-time current value of the stepper motor is greater than or equal to the preset over-step current limit value T, the stepper motor stops rotating and an alarm signal is sent.

[0012] In some embodiments of the present application, during the reverse rotation process of the air deflector, when it is monitored that the real-time current value of the stepper motor is greater than or equal to the preset over-step current limit value T and the actual reverse rotation angle I of the air deflector < the preset angle H, the stepper motor stops reverse rotation and the air deflector stops reverse rotation; then the stepper motor drives the air deflector to rotate by the angle I in the original rotation direction. When it is monitored that the real-time current value of the stepper motor is greater than or equal to the preset over-step current limit value T, the stepper motor stops rotating and an alarm signal is sent.

[0013] In some embodiments of the present application, the alarm signal is sent to one or more of a remote controller, an indoor unit display panel, and a smart terminal to prompt the user that there is a foreign object stuck in the air deflector.

[0014] In some embodiments of the present application, the control method further includes:

[0015] When the air conditioner is powered on for the first time or powered on again after a power outage, during the rotation process of the air deflector, if it is monitored that the real-time current value of the stepper motor is greater than or equal to the preset over-step current limit value T, it is determined that the air deflector reaches the closed position or the fully open position, and the stepper motor stops rotating.

[0016] In some embodiments of the present application, the control method further includes:

[0017] During the operation of the air conditioner and when the position of the air deflector is fixed, monitoring the real-time current value of the stepper motor;

[0018] When it is monitored that the real-time current value of the stepper motor is greater than 0, it is determined that the user manually adjusts the air deflector, and then the stepper motor is controlled to drive the air deflector to rotate in the direction of the user's adjustment. When it is monitored that the real-time current value of the stepper motor is greater than or equal to the preset over-step current limit value T, the stepper motor stops rotating.

[0019] An air conditioner indoor unit deflector control system, comprising:

[0020] A stepper motor for driving the deflector to rotate;

[0021] A current monitoring module for monitoring the real-time current value of the stepper motor;

[0022] A comparison module for comparing the real-time current value of the stepper motor with a preset over-step current limit value T;

[0023] A control module for controlling the stepper motor to stop rotating when it is monitored that the real-time current value of the stepper motor is greater than or equal to the preset over-step current limit value T.

[0024] In some embodiments of the present application, the control system further comprises:

[0025] An angle monitoring module for monitoring the rotation angle of the deflector;

[0026] The control module is further configured to:

[0027] Control the stepper motor to drive the deflector to rotate a preset angle H in a direction opposite to the original rotation direction. When the actual reverse rotation angle I of the deflector reaches the preset angle H, the stepper motor stops rotating. Then the stepper motor drives the deflector to rotate an angle I in the original rotation direction. When it is monitored that the real-time current value of the stepper motor is greater than or equal to the preset over-step current limit value T, the stepper motor stops rotating and sends an alarm signal;

[0028] The control module is further configured to:

[0029] During the reverse rotation of the deflector, when it is monitored that the real-time current value of the stepper motor is greater than or equal to the preset over-step current limit value T and the actual reverse rotation angle I of the deflector < the preset angle H, the stepper motor stops reverse rotation and the deflector stops reverse rotation; then the stepper motor drives the deflector to rotate an angle I in the original rotation direction. When it is monitored that the real-time current value of the stepper motor is greater than or equal to the preset over-step current limit value T, the stepper motor stops rotating and sends an alarm signal.

[0030] In some embodiments of the present application, the control module is further configured to:

[0031] When the air conditioner is powered on for the first time or after power-off and then powered on again, during the rotation of the deflector, if it is monitored that the real-time current value of the stepper motor is greater than or equal to the preset over-step current limit value T, it is determined that the deflector reaches the closed position or the fully open position, and the stepper motor stops rotating;

[0032] The control module is further configured to:

[0033] During the operation of the air conditioner and when the position of the deflector is fixed, monitor the real-time current value of the stepper motor; when it is monitored that the real-time current value of the stepper motor is greater than 0, it is determined that the user manually adjusts the deflector, and then control the stepper motor to drive the deflector to rotate in the direction adjusted by the user. When it is monitored that the real-time current value of the stepper motor is greater than or equal to the preset over-step current limit value T, the stepper motor stops rotating.

[0034] An air conditioner adopts the deflector control method for the indoor unit of the air conditioner described above.

[0035] Compared with the prior art, the advantages and positive effects of the present invention are as follows: The deflector control method, control system and air conditioner for the indoor unit of the air conditioner of the present invention monitor the real-time current value of the stepper motor during the process of the stepper motor driving the deflector to rotate. When it is monitored that the real-time current value of the stepper motor is greater than or equal to the preset over-step current limit value T, control the stepper motor to stop rotating, and the deflector stops rotating, preventing the generation of over-step sound, avoiding waste of electric energy, and solving the problem of easy occurrence of over-step sound.

[0036] After reading the detailed description of the embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become clearer. Description of the Drawings

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0038] Figure 1 It is a schematic structural diagram when the deflector of the indoor unit of the air conditioner is fully opened;

[0039] Figure 2 It is a schematic structural diagram when the deflector of the indoor unit of the air conditioner is fully closed;

[0040] Figure 3 It is a schematic structural diagram when the deflector of the indoor unit of the air conditioner is half-opened;

[0041] Figure 4 It is a flowchart of an embodiment of the deflector control method for the indoor unit of the air conditioner proposed by the present invention;

[0042] Figure 5 It is a flowchart of another embodiment of the deflector control method for the indoor unit of the air conditioner proposed by the present invention;

[0043] Figure 6 It is a flowchart of still another embodiment of the deflector control method for the indoor unit of the air conditioner proposed by the present invention;

[0044] Figure 7It is a flowchart of another embodiment of the air conditioner indoor unit air deflector control method proposed by the present invention;

[0045] Figure 8 It is a flowchart of another embodiment of the air conditioner indoor unit air deflector control method proposed by the present invention;

[0046] Figure 9 It is a structural block diagram of an embodiment of the air conditioner indoor unit air deflector control system proposed by the present invention.

[0047] Reference numerals:

[0048] 1. Indoor heat exchanger; 2. Electric auxiliary heating device; 3. Cross-flow fan; 4. Stepper motor; 5. Air deflector; 6. Housing; 6-1. Air outlet. Detailed implementation manners

[0049] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0050] In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to this application.

[0051] In the description of this application, it should be understood that the terms "first" and "second" are only used for descriptive purposes, and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise stated, the meaning of "plurality" is two or more.

[0052] In the description of this application, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

[0053] In view of the technical problem that the indoor unit of an air conditioner is prone to overstep sound, the present invention provides a control method, a control system and an air conditioner for the guide plate of the indoor unit of an air conditioner, which can prevent the generation of overstep sound and avoid waste of electric energy. Next, the control method, the control system and the air conditioner for the guide plate of the indoor unit of the present invention will be described in detail with reference to the accompanying drawings.

[0054] Figure 1 、 Figure 2 、 Figure 3 It is a schematic diagram of the indoor unit of an air conditioner, which respectively shows the guide plate of the indoor unit of the air conditioner at the fully opened angle A, the fully closed angle C, and the intermediate angle B. The overstep current limit value T of the preset stepping motor is detected in real time.

[0055] The stepping motor rotates, and then drives the guide plate to rotate; when the stepping motor rotates in the reverse direction, the guide plate also rotates in the reverse direction.

[0056] Embodiment 1

[0057] The control method for the guide plate of the indoor unit of the air conditioner in this embodiment mainly includes the following steps, as shown in Figure 4 shown.

[0058] Step S11: During the process of the stepping motor driving the guide plate to rotate, monitor the real-time current value of the stepping motor.

[0059] Step S12: Determine whether the real-time current value of the stepping motor is greater than or equal to the preset overstep current limit value T.

[0060] When it is monitored that the real-time current value of the stepping motor is greater than or equal to the preset overstep current limit value T, execute Step S13: Control the stepping motor to stop rotating, and the guide plate also stops rotating.

[0061] When the stepping motor drives the guide plate to rotate normally, the current value of the stepping motor will not be greater than the preset overstep current limit value T; when the real-time current value of the stepping motor is greater than or equal to the preset overstep current limit value T, it indicates that the guide plate is stuck by foreign objects or the guide plate reaches the closed position or the guide plate reaches the maximum open position, then the stepping motor stops running and the guide plate stops rotating, preventing the generation of overstep sound and avoiding waste of electric energy.

[0062] The control method for the guide plate of the indoor unit of the air conditioner in this embodiment monitors the real-time current value of the stepping motor during the process of the stepping motor driving the guide plate to rotate. When it is monitored that the real-time current value of the stepping motor is greater than or equal to the preset overstep current limit value T, control the stepping motor to stop rotating and the guide plate to stop rotating, preventing the generation of overstep sound and avoiding waste of electric energy, and solving the problem of easy occurrence of overstep sound.

[0063] If the guide plate does not reach the closed position or the maximum open position, and the real-time current value of the stepper motor is monitored to be ≥ the preset overstep current limit value T, it can be determined that the guide plate is stuck by foreign objects.

[0064] In some other embodiments of the present application, if it is determined that the guide plate is stuck by foreign objects, after the stepper motor stops rotating in step S13, the following steps are further included. See Figure 5 as shown.

[0065] Step S14: The stepper motor drives the guide plate to rotate a preset angle H in the direction opposite to the original rotation direction, and monitors the actual reverse rotation angle of the guide plate.

[0066] When the stepper motor changes the rotation direction, it drives the guide plate to rotate in the direction opposite to the original rotation direction.

[0067] Step S15: When the actual reverse rotation angle I of the guide plate reaches the preset angle H, the stepper motor stops reverse rotation, the guide plate stops reverse rotation, and records the actual reverse rotation angle I = the preset angle H; then the stepper motor drives the guide plate to rotate the angle I (i.e., the preset angle H) in the original rotation direction. During the rotation of the guide plate, the real-time current value of the stepper motor is monitored. When it is monitored that the real-time current value of the stepper motor is greater than or equal to the preset overstep current limit value T, it indicates that the foreign object still exists. Then the stepper motor stops rotating, the guide plate stops rotating, and an alarm signal is sent to prompt the user to clean the foreign object in time.

[0068] If it is monitored that the real-time current value of the stepper motor is less than the preset overstep current limit value T, the stepper motor drives the guide plate to continue running according to the set mode.

[0069] By designing steps S14 - S15, the guide plate is controlled to reverse by a preset angle H, and then rotate by the preset angle H in the original direction. During the process of the guide plate changing the rotation direction, the foreign object may fall off. If the foreign object still does not fall off, the stepper motor stops rotating and an alarm signal is sent.

[0070] In order to prevent overstep sound from being generated, during the reverse rotation of the guide plate, the real-time current value of the stepper motor and the actual reverse rotation angle of the guide plate also need to be monitored. When it is monitored that the real-time current value of the stepper motor is greater than or equal to the preset overstep current limit value T, and the actual reverse rotation angle I of the guide plate < the preset angle H, it indicates that the guide plate reaches the closed position or the fully open position. Then the stepper motor stops reverse rotation, the guide plate stops reverse rotation, to prevent overstep sound from being generated, and records the actual reverse rotation angle I of the guide plate; then the stepper motor drives the guide plate to rotate the angle I in the original rotation direction. During the rotation of the guide plate, the real-time current value of the stepper motor is monitored. When it is monitored that the real-time current value of the stepper motor is greater than or equal to the preset overstep current limit value T, it indicates that the foreign object still exists. The stepper motor stops rotating, the guide plate stops rotating, and an alarm signal is sent to prompt the user to clean the foreign object in time.

[0071] If the real-time current value of the stepper motor is monitored to be less than the preset overstep current limit value T, the guide plate continues to run according to the set mode.

[0072] When the air conditioner is running normally, when the guide plate is in a non-closed position or a non-fully opened position and moves in the closing or opening direction, if the real-time current value of the stepper motor is monitored to be ≥ the preset overstep current limit value T, it is determined that there is a foreign object stuck on the guide plate, and the guide plate is controlled to rotate a preset angle H in the direction opposite to the original running direction, and the real-time current value of the stepper motor is continuously monitored. When the reverse rotation angle of the guide plate has not reached the preset angle H but has reached the closed or fully opened position (that is, the real-time current value of the stepper motor is monitored to be ≥ the preset overstep current limit value T), the stepper motor and the guide plate stop reverse rotation to avoid the problem of overstep sound, and the actual reverse rotation angle I of the guide plate is recorded.

[0073] Therefore, during the reverse rotation of the guide plate, there are the following two situations:

[0074] (1) When the guide plate starts to reverse rotate until the actual reverse rotation angle I of the guide plate reaches the preset angle H, and the real-time current value of the stepper motor does not reach ≥ the preset overstep current limit value T, then the actual reverse rotation angle I = the preset angle H.

[0075] (2) When the actual reverse rotation angle I of the guide plate has not reached the preset angle H and the real-time current value of the stepper motor reaches ≥ the preset overstep current limit value T, the guide plate is triggered to stop continuing to reverse rotate, and the actual reverse rotation angle I is recorded (at this time, the angle I < the preset angle H).

[0076] When the guide plate rotates an angle I in the original rotation direction again, if the real-time current value of the stepper motor reaches ≥ T again, it is determined that the foreign object has not been removed, the guide plate stops rotating, and an alarm signal is sent.

[0077] In some embodiments of the present application, the alarm signal is sent to one or more of a remote controller, an indoor unit display panel, and a smart terminal (such as a mobile phone APP) to timely prompt the user that there is a foreign object stuck on the guide plate, so that the user can take timely measures to avoid affecting the normal operation of the air conditioner for a long time.

[0078] Next, through a specific embodiment, the principle of the guide plate control method of the present application will be described in detail.

[0079] Preset condition 1: The real-time current value of the stepper motor is ≥ the preset overstep current limit value T.

[0080] When the real-time current value of the stepper motor is monitored to be ≥ the preset overstep current limit value T, the preset condition 1 is satisfied, and it is determined that there is a foreign object stuck on the guide plate, or the guide plate has reached the closed position, or the guide plate has reached the maximum open position.

[0081] Preset condition 2: The real-time current value of the stepper motor is greater than or equal to the preset overstep current limit value T, and the actual reverse rotation angle I of the guide plate < preset angle H.

[0082] See Figure 6 As shown, during the normal operation of the air conditioner, the stepper motor drives the guide plate to move, monitors the real-time current value of the stepper motor, and determines whether the preset condition 1 is satisfied; if the preset condition 1 is not satisfied, the stepper motor drives the guide plate to continue to move in the original direction; if the preset condition 1 is satisfied, the stepper motor drives the guide plate to rotate in the reverse direction by a preset angle H; during the reverse rotation of the guide plate, it is determined whether the preset condition 2 is satisfied; if the preset condition 2 is not satisfied, the stepper motor drives the guide plate to rotate in the original direction by an angle I; if the preset condition 2 is satisfied, the actual reverse rotation angle I of the guide plate is recorded, the stepper motor stops reverse rotation, and then the stepper motor drives the guide plate to rotate in the original direction by an angle I; when the guide plate rotates in the original direction, it is determined whether the preset condition 1 is satisfied; if the preset condition 1 is not satisfied, the stepper motor drives the guide plate to continue to operate according to the set mode; if the preset condition 1 is satisfied, the stepper motor and the guide plate stop rotating, and an alarm signal is sent to the user to prompt the user that the guide plate is stuck by a foreign object.

[0083] In some embodiments of the present application, when the air conditioner is powered on for the first time or powered on again after power-off, during the rotation of the guide plate, if it is monitored that the real-time current value of the stepper motor is greater than or equal to the preset overstep current limit value T, it is determined that the guide plate reaches the closed position or the fully opened position, the stepper motor stops rotating, and the guide plate stops rotating to prevent the generation of overstep sound.

[0084] During the actual use of the air conditioner, when the air conditioner is powered on again after power-off, if the guide plate is not in the closed position when power-off, and when powered on again, if the guide plate directly rotates according to the set reset action, there may be problems such as long-term overstep sound or misjudgment as being stuck by a foreign object, resulting in abnormal guide plate movement problems. To avoid this situation, when the air conditioner is powered on again after power-off and the air conditioner determines that it is powered on for the first time, during the reset or movement of the guide plate, the real-time current value of the stepper motor is monitored. When the real-time current value of the stepper motor ≥ the preset overstep current limit value T, it is determined that the guide plate reaches the closed position or the fully opened position, the stepper motor stops rotating, and the guide plate stops rotating.

[0085] See Figure 7 As shown, when the air conditioner is powered on for the first time or powered on again after power-off, when the guide plate is reset or operates according to the user-set mode, the real-time current value of the stepper motor is monitored, and it is determined whether the preset condition 1 is satisfied; if the preset condition 1 is not satisfied, the stepper motor drives the guide plate to continue to move; if the preset condition 1 is satisfied, the stepper motor stops rotating, and the guide plate stops rotating to prevent the generation of overstep sound.

[0086] In some embodiments of the present application, in order to prevent the user from forcibly adjusting the position of the deflector and affecting the service life of the deflector and the stepper motor, during the operation of the air conditioner and when the position of the deflector is fixed, the real-time current value of the stepper motor is monitored; when it is monitored that the real-time current value of the stepper motor is greater than 0, it is determined that the user manually adjusts the angle of the deflector, and then the stepper motor is controlled to drive the deflector to actively rotate in the direction adjusted by the user. During the rotation process, the real-time current value of the stepper motor is monitored. When it is monitored that the real-time current value of the stepper motor is greater than or equal to the preset overstep current limit value T, it is determined that the user has adjusted the deflector to the required position, and the stepper motor is controlled to stop rotating, and the deflector also stops rotating.

[0087] During the actual use of the air conditioner by the user, it often occurs that the set position of the deflector of the air conditioner is not ideal, and the user manually adjusts the angle of the deflector. This operation has a certain impact on the deflector structure and the stepper motor. Frequently and forcibly manually adjusting the angle of the stepper motor through the deflector may affect the service life of the deflector and the stepper motor. When the air conditioner is running and the deflector is at a fixed angle, the real-time current value of the stepper motor is monitored. At this time, the real-time current value of the stepper motor = 0. When the user manually adjusts the angle of the deflector to cause the motor in the stepper motor to have a cutting magnetic induction line movement, that is, the electromagnetic induction phenomenon, thus generating a slight current value. When it is monitored that the current value of the stepper motor > 0, it is determined that the user manually adjusts the deflector, and the stepper motor is controlled to actively rotate in the direction adjusted by the user, and the real-time current value of the stepper motor is detected. When the real-time current value of the stepper motor ≥ the preset overstep current limit value T, it is determined that the user has adjusted the deflector to the required position, and then the stepper motor is controlled to stop rotating.

[0088] Preset condition 3: The real-time current value of the stepper motor > 0. See Figure 8 As shown, during the operation of the air conditioner, when the deflector is in a fixed position state, the real-time current value of the stepper motor is monitored to determine whether the preset condition 3 is satisfied; if the preset condition 3 is satisfied, the stepper motor drives the deflector to rotate in the direction adjusted by the user. During the rotation process, it is determined whether the preset condition 1 is satisfied; if the preset condition 1 is not satisfied, the stepper motor drives the deflector to continue rotating; if the preset condition 1 is satisfied, the stepper motor stops rotating, and the deflector stops rotating.

[0089] The deflector control method for the indoor unit of the air conditioner in this embodiment determines the deflector operation state by monitoring the current value when the stepper motor actively operates and the micro current value when it does not actively rotate, and combines the operation logic to ensure the more reasonable operation of the air conditioner, avoiding problems such as long deflector reset time and many overstep sounds of the stepper motor.

[0090] The deflector control method for the indoor unit of the air conditioner in this embodiment monitors the current of the stepper motor. When the current value is greater than or equal to the preset overstep current limit value, and the control program is limited for the position of the deflector and various situations, avoiding abnormal problems such as overstep sounds and repeated deflector actions.

[0091] Embodiment 2

[0092] Based on the design of the air conditioner indoor unit deflector control method in Embodiment 1, this Embodiment 2 proposes an air conditioner indoor unit deflector control system, including a stepping motor, a current monitoring module, a comparison module, a control module, etc., as shown in Figure 9 shown.

[0093] The stepping motor is used to drive the deflector to rotate.

[0094] The current monitoring module is used to monitor the real-time current value of the stepping motor.

[0095] The comparison module is used to compare the real-time current value of the stepping motor with the preset overstep current limit value T.

[0096] The control module is used to control the stepping motor to stop rotating when it is detected that the real-time current value of the stepping motor is greater than or equal to the preset overstep current limit value T.

[0097] In some embodiments of this application, the air conditioner indoor unit deflector control system further includes: an angle monitoring module, which is used to monitor the rotation angle of the deflector.

[0098] The control module is further used for:

[0099] Controlling the stepping motor to drive the deflector to rotate a preset angle H in the direction opposite to the original rotation direction. When the actual reverse rotation angle I of the deflector reaches the preset angle H, the stepping motor stops rotating. Then the stepping motor drives the deflector to rotate the angle I in the original rotation direction. When it is detected that the real-time current value of the stepping motor is greater than or equal to the preset overstep current limit value T, the stepping motor stops rotating and sends an alarm signal.

[0100] The control module is further used for:

[0101] During the reverse rotation process of the deflector, when it is detected that the real-time current value of the stepping motor is greater than or equal to the preset overstep current limit value T and the actual reverse rotation angle I of the deflector < the preset angle H, the stepping motor stops reverse rotation and the deflector stops reverse rotation; then the stepping motor drives the deflector to rotate the angle I in the original rotation direction. When it is detected that the real-time current value of the stepping motor is greater than or equal to the preset overstep current limit value T, the stepping motor stops rotating and sends an alarm signal.

[0102] The control module is further used for:

[0103] When the air conditioner is powered on for the first time or powered on again after a power-off, during the rotation process of the deflector, if it is detected that the real-time current value of the stepping motor is greater than or equal to the preset overstep current limit value T, it is determined that the deflector reaches the closed position or the fully open position, and the stepping motor stops rotating.

[0104] The control module is further used for:

[0105] During the operation of the air conditioner and when the position of the deflector is fixed, monitor the real-time current value of the stepper motor; when it is monitored that the real-time current value of the stepper motor is greater than 0, it is determined that the user manually adjusts the deflector, and then control the stepper motor to drive the deflector to rotate in the direction adjusted by the user. When it is monitored that the real-time current value of the stepper motor is greater than or equal to the preset over-step current limit value T, the stepper motor stops rotating.

[0106] The working process of the specific deflector control system of the air conditioner indoor unit has been described in detail in the deflector control method of the air conditioner indoor unit in Embodiment 1, and will not be elaborated here.

[0107] The deflector control system of the air conditioner indoor unit in this embodiment monitors the real-time current value of the stepper motor during the process of the stepper motor driving the deflector to rotate. When it is monitored that the real-time current value of the stepper motor is greater than or equal to the preset over-step current limit value T, control the stepper motor to stop rotating and the deflector to stop rotating, preventing the generation of over-step sound, avoiding waste of electric energy, and solving the problem of easy occurrence of over-step sound.

[0108] Embodiment 3

[0109] Based on the design of the deflector control method of the air conditioner indoor unit in Embodiment 1, this Embodiment 3 proposes an air conditioner that adopts the deflector control method of the air conditioner indoor unit described in Embodiment 1.

[0110] By adopting the deflector control method of the air conditioner indoor unit in the air conditioner, monitor the real-time current value of the stepper motor during the process of the stepper motor driving the deflector to rotate. When it is monitored that the real-time current value of the stepper motor is greater than or equal to the preset over-step current limit value T, control the stepper motor to stop rotating and the deflector to stop rotating, preventing the generation of over-step sound, avoiding waste of electric energy, and solving the problem of easy occurrence of over-step sound.

[0111] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A control method for an air conditioner indoor unit guide plate, characterized in that: Including: During the process of driving the guide plate to rotate by the stepper motor, monitor the real-time current value of the stepper motor; When it is monitored that the real-time current value of the stepper motor is greater than or equal to the preset overstep current limit value T, control the stepper motor to stop rotating; After the stepper motor stops rotating, the following steps are further included: The stepper motor drives the guide plate to rotate a preset angle H in the direction opposite to the original rotation direction. When the actual reverse rotation angle I of the guide plate reaches the preset angle H, the stepper motor stops rotating. Then the stepper motor drives the guide plate to rotate the angle I in the original rotation direction. When it is monitored that the real-time current value of the stepper motor is greater than or equal to the preset overstep current limit value T, the stepper motor stops rotating and sends an alarm signal; During the reverse rotation process of the guide plate, When it is monitored that the real-time current value of the stepper motor is greater than or equal to the preset overstep current limit value T and the actual reverse rotation angle I of the guide plate < the preset angle H, the stepper motor stops reverse rotation and the guide plate stops reverse rotation; Then the stepper motor drives the guide plate to rotate the angle I in the original rotation direction. When it is monitored that the real-time current value of the stepper motor is greater than or equal to the preset overstep current limit value T, the stepper motor stops rotating and sends an alarm signal.

2. The control method according to claim 1, wherein: The alarm signal is sent to one or more of a remote controller, an indoor unit display panel, and a smart terminal to prompt the user that there is a foreign object stuck on the guide plate.

3. The control method according to claim 1, characterized in that: The control method further includes: When the air conditioner is powered on for the first time or powered on again after power-off, during the rotation process of the guide plate, if it is monitored that the real-time current value of the stepper motor is greater than or equal to the preset overstep current limit value T, it is determined that the guide plate reaches the closed position or the fully opened position, and the stepper motor stops rotating.

4. The control method according to any one of claims 1 to 3, characterized in that: The control method further includes: During the operation of the air conditioner and when the position of the guide plate is fixed, monitor the real-time current value of the stepper motor; When it is monitored that the real-time current value of the stepper motor is greater than 0, it is determined that the user manually adjusts the guide plate, then control the stepper motor to drive the guide plate to rotate in the direction of the user's adjustment. When it is monitored that the real-time current value of the stepper motor is greater than or equal to the preset overstep current limit value T, the stepper motor stops rotating.

5. An air conditioner indoor unit deflector control system, characterized in that: Including: A stepper motor for driving the guide plate to rotate; A current monitoring module for monitoring the real-time current value of the stepper motor; A comparison module for comparing the size of the real-time current value of the stepper motor with the preset overstep current limit value T; A control module for controlling the stepper motor to stop rotating when it is monitored that the real-time current value of the stepper motor is greater than or equal to the preset overstep current limit value T; The control system further includes: An angle monitoring module for monitoring the rotation angle of the guide plate; The control module is further used for: Controlling the stepper motor to drive the guide plate to rotate a preset angle H in the direction opposite to the original rotation direction. When the actual reverse rotation angle I of the guide plate reaches the preset angle H, the stepper motor stops rotating. Then the stepper motor drives the guide plate to rotate the angle I in the original rotation direction. When it is monitored that the real-time current value of the stepper motor is greater than or equal to the preset overstep current limit value T, the stepper motor stops rotating and sends an alarm signal; The control module is further used for: During the reverse rotation process of the guide plate, when it is monitored that the real-time current value of the stepper motor is greater than or equal to the preset overstep current limit value T and the actual reverse rotation angle I of the guide plate < the preset angle H, the stepper motor stops reverse rotation and the guide plate stops reverse rotation; Then the stepper motor drives the guide plate to rotate by an angle I in the original rotation direction. When it is detected that the real-time current value of the stepper motor is greater than or equal to the preset overstep current limit value T, the stepper motor stops rotating and sends an alarm signal.

6. The control system according to claim 5, wherein: The control module is further configured to: When the air conditioner is powered on for the first time or powered on again after a power failure, during the rotation of the guide plate, if it is detected that the real-time current value of the stepper motor is greater than or equal to the preset overstep current limit value T, it is determined that the guide plate reaches the closed position or the fully open position, and the stepper motor stops rotating; The control module is further configured to: During the operation of the air conditioner and when the position of the guide plate is fixed, monitor the real-time current value of the stepper motor; when it is detected that the real-time current value of the stepper motor is greater than 0, it is determined that the user manually adjusts the guide plate, and then control the stepper motor to drive the guide plate to rotate in the direction adjusted by the user. When it is detected that the real-time current value of the stepper motor is greater than or equal to the preset overstep current limit value T, the stepper motor stops rotating.

7. An air conditioner, characterized in that: Adopt the guide plate control method for the indoor unit of the air conditioner according to any one of claims 1 to 4.

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