Air conditioner and control method thereof

Abstract

This application provides an air conditioner and a control method thereof, relating to the technical field of air conditioners. This method is applied to a controller of an indoor air conditioner unit, the indoor air conditioner also including a human body sensor, a guide vane motor, and a fan. The controller is electrically connected to the human body sensor, the guide vane motor, and the fan, respectively. When the human body sensor detects a human body signal, the guide vane motor and / or the fan are controlled to stop operating. After the signal detection is complete, the guide vane motor and / or the fan are controlled to operate. The air conditioner and control method provided by this application have the advantage of higher detection accuracy.

Description

Technical Field

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

[0002] Air conditioning is a common appliance in our daily lives. When operating air conditioning in relatively large buildings, a patio-mounted indoor unit is typically used to maximize the air conditioning effect. However, due to this large-space air conditioning scenario, existing technologies fail to consider air conditioning requirements such as the heat load distribution and user distribution within the space. Air is delivered evenly from each outlet of the indoor unit, resulting in temperature differences within the air-conditioned space, reduced user comfort due to direct airflow, and energy-saving issues such as unnecessary energy consumption caused by the same air supply in occupied and unoccupied areas.

[0003] Therefore, in order to improve the above problems, a human body sensor is set on the air conditioner in the prior art. The human body sensor obtains the user's position and human body data, and regulates the air outlet of the air conditioner to achieve the purpose of improving user comfort.

[0004] However, when the air conditioner is running, vibration will occur, causing the human body sensor to vibrate as well, ultimately resulting in greater interference in the detection and possible errors.

[0005] In summary, in the prior art, when using human body sensors on air conditioners to perform data detection, there is a problem of large detection interference. Summary of the Invention

[0006] The purpose of the present application is to provide an air conditioner and a control method thereof, so as to solve the problem of large detection interference when using a human body sensor on the air conditioner for data detection in the prior art.

[0007] To solve the above problems, the present application provides an air conditioner control method, which is applied to a controller of an air conditioner indoor unit, wherein the air conditioner indoor unit further includes a human body sensor, an air guide blade motor, and a fan, and the controller is electrically connected to the human body sensor, the air guide blade motor, and the fan, respectively; the method comprises:

[0008] When the human body sensor detects a human body signal, the air guide blade motor and / or the fan are controlled to stop working;

[0009] When the signal detection is completed, the air guide blade motor and / or the fan are controlled to operate.

[0010] Since the present application directly controls the air guide blade motor and / or fan to stop working when using the human body sensor for data detection, vibration is avoided during detection, thereby making the data detected by the human body sensor more accurate.

[0011] Optionally, the step of controlling the fan to stop working includes:

[0012] Controlling to stop transmitting the driving current to the fan within a preset time period, wherein the fan rotates by inertia and does not stop within the preset time period;

[0013] The steps of controlling the operation of the fan include:

[0014] After the preset time period has passed, the driving current is transmitted to the fan again.

[0015] Optionally, the step of controlling the fan to operate includes:

[0016] Obtaining the three-phase terminal voltage of the wind turbine under a preset time length;

[0017] Determining the phase of the fan according to the three-phase terminal voltage under the preset time length;

[0018] The fan is controlled to operate according to the phase of the fan.

[0019] Optionally, when the human body sensor detects a human body signal, the step of controlling the air guide blade motor and / or the fan to stop working includes:

[0020] When the angle of the air guide blade is 90° and / or 0°, the human body sensor is used to detect human body signals and control the fan to stop working.

[0021] Optionally, after the signal detection is completed and the step of controlling the air guide blade motor and / or the fan to operate is completed, the method further includes:

[0022] After a preset time, the human body sensor is used again to detect human body signals.

[0023] On the other hand, the present application also provides an air conditioner, including an air conditioner indoor unit, the air conditioner indoor unit including a controller, a human body sensor, an air guide blade motor and a fan, the controller being electrically connected to the human body sensor, the air guide blade motor and the fan respectively; the human body sensor being mounted on a housing of the air conditioner indoor unit; wherein,

[0024] When the human body sensor detects a human body signal, the controller is used to control the air guide blade motor and / or the fan to stop working;

[0025] After the signal detection is completed, the controller is further used to control the operation of the air guide blade motor and / or the fan.

[0026] Optionally, the human body sensor includes a millimeter wave radar.

[0027] Optionally, the human body sensor is further connected to the rotating shaft of the motor, and the air conditioner indoor unit further includes a casing, which is arranged outside the sensor; wherein,

[0028] The motor is used to drive the human body sensor to rotate, and when the human body sensor detects a human body signal, the motor stops working.

[0029] Optionally, the air conditioner indoor unit also includes a drive unit, which includes a rectifier circuit, a frequency conversion circuit and a sampling circuit. The rectifier circuit is used to connect to an AC power supply and is electrically connected to the frequency conversion circuit. The frequency conversion circuit is electrically connected to the fan through three phase lines to drive the fan to work. The sampling circuit is electrically connected to the three phase lines respectively and is used to sample the voltages of the three phase lines.

[0030] Optionally, an air intake is provided in the middle of the indoor unit of the air conditioner, air outlets are provided around the air intake, air guide blades are provided at the air outlet position, and the air guide blades are connected to the wind guide plate motor to drive the air guide blades to rotate through the air guide blade motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the module of the air conditioner indoor unit provided in this application.

[0032] Figure 2 This is an exemplary flow chart of the air conditioner control method provided in an embodiment of the present application.

[0033] Figure 3 This is a schematic diagram of the structure of the air conditioner indoor unit and air conditioner outdoor unit provided in an embodiment of the present application.

[0034] Figure 4 A schematic diagram of the sensor output changes provided in an embodiment of the present application.

[0035] Figure 5 This is a schematic diagram of the motor vibration over time when the motor is driven according to an embodiment of the present application.

[0036] Figure 6 A schematic diagram of vibration over time after deleting the motor drive current provided in an embodiment of the present application.

[0037] Figure 7 Schematic diagram of the changes in the wind guide blade angle, fan drive, and sensor detection over time provided in the embodiment of the present application.

[0038] Figure 8 A circuit diagram of a drive unit provided in an embodiment of the present application.

[0039] Figure 9A schematic diagram of the detection values ​​of the voltage sensor in the drive unit provided in an embodiment of the present application.

[0040] Figure 10 This is a connection diagram of the millimeter-wave radar provided in an embodiment of the present application.

[0041] Description of reference numerals:

[0042] 110-controller; 120-human body sensor; 130-air guide blade motor; 140-fan. DETAILED DESCRIPTION

[0043] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0044] As described in the background, air conditioners are currently equipped with human sensors. These sensors detect the user's location and body data, and adjust the airflow to improve user comfort. For example, the human sensor can detect the user's location and adjust the air outlet to direct air toward that location. Alternatively, if multiple air outlets are present, some can be closed based on the user's location to improve user comfort.

[0045] However, when an air conditioner is running, it vibrates, causing the human body sensor to vibrate as well. This ultimately results in significant interference with detection, potentially leading to errors. For example, if the human body sensor is a millimeter-wave radar, when the millimeter-wave radar itself vibrates, a relative velocity is generated between the stationary object and the millimeter-wave radar. The reflected wave from the stationary object experiences a Doppler shift, causing an unoccupied scene to be falsely detected as a person. In particular, the vibrations generated by the air conditioner during operation can cause interference in the millimeter-wave radar's detection values. This can lead to errors in the detection of human body information.

[0046] In view of this, the present application provides an air conditioner control method to improve the above problems.

[0047] Please note that Figure 1 The air conditioner control method provided in this application can be applied to the controller 110 of the air conditioner indoor unit, which also includes a human body sensor 120, an air guide blade motor 130 and a fan 140. The controller 110 is electrically connected to the human body sensor 120, the air guide blade motor 130 and the fan 140 respectively.

[0048] The air conditioner control method provided in this application is exemplarily described below:

[0049] As an implementation, see Figure 2 , the method comprising:

[0050] S102: When a human body signal is detected by the human body sensor, the air guide blade motor and / or the fan are controlled to stop working;

[0051] S104: After the signal detection is completed, the air guide blade motor and / or the fan are controlled to operate.

[0052] Among them, see Figure 3 The air conditioner includes an indoor unit 1 and an outdoor unit 4. The indoor unit 1 is a ceiling-mounted unit capable of discharging air in four directions. The indoor unit 1 and the outdoor unit 4 are connected by a refrigerant pipe 5, forming a refrigerant circuit. The indoor unit 1 has a main body 6 and air guide blades 2a to 2d. The main body 6 is box-shaped, with a square air intake 7 located slightly in the center of the lower portion and four air outlets 3a to 3d surrounding it. The air intake 7 and the air outlets communicate with the air duct within the main body 6. The air guide blades 2a to 2d serve as wind direction adjustment plates that guide the air blown out of the air outlets 3a to 3d in the vertical direction. Each air outlet 3a to 3d is in the shape of an elongated rectangle. Furthermore, the millimeter-wave radar 9 installed in the air conditioner can be used to detect the presence of a user. The millimeter-wave radar can detect users by detecting changes in the frequency of radio waves corresponding to subtle human movements, breathing, and pulse, which will not be described in detail here.

[0053] exist Figure 3 Based on the Figure 4 , Figure 4 This graph shows an example of how the sensor output of a millimeter-wave radar installed in an air conditioner changes over time. Figure 4 The horizontal axis represents time, and the vertical axis represents the millimeter wave radar detection value (converted voltage value). The air conditioner is in operation until time T1. At time T1, the air conditioner power is disconnected and the air conditioner stops. Figure 4 As shown, during the operation of air conditioner 2 from time T1 onward, the vibrations associated with the operation were transmitted to the millimeter-wave radar, and thus the corresponding changes in the millimeter-wave radar sensor values ​​were reflected. As shown in the example, the vibrations during air conditioner operation may be caused by the movement of the fan and air guide vanes (i.e., guide vanes). This vibration interference will affect the error in biometric detection based on the millimeter-wave radar sensor values, thereby also causing errors in human body detection based on this biometric information.

[0054] Therefore, when the human body sensor is used to detect a human body signal, the present application controls the air guide blade motor and / or the fan to stop working; that is, controlling the air guide blade motor to stop working, controlling the fan to stop working, or controlling both to stop working simultaneously can reduce the vibration of the air conditioner, thereby improving the detection accuracy of the human body sensor and avoiding detection errors. Of course, the present application preferably controls both to stop working simultaneously.

[0055] The guide vane motor is a motor used to control the rotation of the guide vanes. Generally, the guide vanes can rotate within a range of 0° to 90°, with the guide vanes parallel to the horizontal plane at 0°. The fan is a motor used to control the air output of the air conditioner. Furthermore, the human body sensor provided in this application uses a millimeter-wave radar. Of course, in other embodiments, other devices can also be used as human body sensors, which is not limited here.

[0056] See also Figure 5 and Figure 6 ,like Figure 5 The following shows an example of motor vibration over time when the motor is driven. Figure 6 The figure shows an example of the change in vibration over time after removing the component caused by the motor drive current. The vibration component caused by the drive current refers to the carrier frequency component contained in the motor drive current. In other words, as can be seen from both figures, the component caused by the drive current accounts for the majority of the motor vibration. Therefore, by stopping the motor drive current, the vibration can be significantly reduced.

[0057] On this basis, as an implementation method, the steps of controlling the fan to stop working include:

[0058] Controlling to stop transmitting the driving current to the fan within a preset time period, wherein the fan rotates according to inertia and does not stop within the preset time period;

[0059] The steps to control the fan operation include:

[0060] After a preset time period, the drive current is transmitted to the fan again.

[0061] The preset time period provided in this application can be relatively short, and only needs to meet the time required for human body sensor detection, and is not limited here. By controlling the cessation of the transmission of driving current to the fan, it is possible to ensure that the air conditioner does not vibrate during the detection data detection, thereby improving the detection accuracy.

[0062] In one implementation, the present application provides an example of how the air guide blade angle, fan drive, and sensor detection of an air conditioner change over time. Figure 7As shown, the guide blade angle indicates the angle of the guide blade relative to the ceiling surface, and the fan drive indicates whether the blade is rotated and driven by the current of its drive device. The guide blade can change the air outlet direction of the indoor unit by adjusting the angle. Generally, air conditioners control and adjust the air outlet direction, evenly distribute the indoor temperature, and adjust the air outlet direction corresponding to the user's position to provide a comfortable environment for the user. At this time, the guide blade motor is generally driven by the current of the drive device. During the motor driving period, the vibration caused by the guide blade movement is relatively large. During the period from time t1 to t2 and time t3 to t4, the guide blade movement is stopped. At this time, the guide blade vibration does not occur. Among them, the period from time t1 to t2 and time t3 to t4 are the time periods when the guide blade motor stops running.

[0063] Therefore, when the human body sensor is used to detect a human body signal, the steps of controlling the air guide blade motor and / or the fan to stop working include:

[0064] When the angle of the wind guide blade is 90° and / or 0°, the human body sensor is used to detect human body signals and control the fan to stop working.

[0065] That is, the detection can be performed when the wind guide blade angle is 90°, or when the wind guide blade angle is 0°, or when the wind guide blade angle is both 90° and 0°, which is not limited here. Figure 7 It can be seen that the change in the angle of the air guide blade will be in the opposite direction, so the controller will control the air guide blade motor to stop working temporarily at this time, and signal detection can be performed at this time.

[0066] Similarly, by stopping the current drive of the fan at the same time, the fan vibration can also be reduced. Figure 5 As shown in the figure, the vibration caused by the fan drive is large. During the time t1 to t2 and the time t3 to t4, the current output of the drive device is stopped to allow it to run inertia. The stop time here can be set to 2 seconds, for example. Therefore, the fan speed is as shown by the dotted line in the figure. During the current output stop period, the speed drops slightly and then resumes the original speed after restarting. During the above inertia operation, the vibration is as follows Figure 6 By performing millimeter-wave radar sensor detection during vibration reduction, detection in low-vibration environments is possible, enabling accurate user detection.

[0067] That is, in this application, when the angle of the air guide blade is 90° or 0°, human body signal detection is performed. At this time, the air guide blade fan stops supplying power, and the controller also stops supplying power to the fan, allowing the fan to continue running by inertia, and during this period, the human body sensor is used to detect human body signals. After the detection is completed, the controller continues to control the power supply to the fan, allowing the fan to continue running, thereby completing the signal detection.

[0068] Understandably, this implementation avoids interference from motor vibration during signal detection, resulting in more accurate detection results. Furthermore, because the fan continues to rotate due to inertia, its speed only temporarily decreases during detection and does not stop, thus not affecting the normal operation of the air conditioner.

[0069] In an optional implementation, after the step of controlling the air guide blade motor and / or the fan to operate after the signal detection is completed, the method further includes:

[0070] After a preset time, the human body sensor is used again to detect human body signals.

[0071] That is, in this application, human body signal detection can be performed periodically to determine the user's position, thereby more accurately controlling the air flow. The preset time can be customized. Of course, periodic detection can also be performed according to the angle of the air guide blade. For example, when the air guide blade angle is 90°, human body signal detection is performed. After that, the air guide blade continues to rotate from 90° to 0°, and then from 0° to 90°. When the air guide blade angle is 90° again, human body signal detection continues. Of course, human body signal detection can also be performed at 0°, and this is not limited here.

[0072] As an implementation method, after the signal detection is completed, the steps of controlling the fan operation include:

[0073] S1041, obtaining the three-phase terminal voltage of the wind turbine under a preset duration;

[0074] S1042, determining the phase of the wind turbine based on the three-phase terminal voltage during a preset time period;

[0075] S1043, controlling the operation of the fan according to the phase of the fan.

[0076] Currently, methods for restarting a wind turbine from inertial operation include the induced voltage method, the short-circuit current method, and the inductance method. These methods can achieve restarting from inertial operation. In this application, the induced voltage value is obtained by detecting the three-phase terminal voltage of the wind turbine. This is then combined with the induced voltage phase to drive the motor for restart, thereby ensuring that the restart does not cause damage to the motor.

[0077] The air conditioner indoor unit of the present application is provided with a driving unit, which can realize the acquisition of three-phase terminal voltage while driving the motor. Figure 8 The drive unit includes a rectifier circuit, a frequency conversion circuit and a sampling circuit. The rectifier circuit is used to connect to the AC power supply and is electrically connected to the frequency conversion circuit. The frequency conversion circuit is electrically connected to the fan through three phase lines to drive the fan to work. The sampling circuit is electrically connected to the three phase lines respectively and is used to sample the voltages of the three phase lines.

[0078] Combine Figure 8 As shown, AC power is supplied from an AC power source 10, converted to DC by a rectifier circuit 11 in the motor drive device, and then supplied to a frequency conversion circuit 12 formed by switching devices such as multiple IGBTs. The switching devices comprise a three-phase series circuit consisting of two IGBTs. These series circuits are connected to a fan 13, and the load blades 14 are mechanically connected to the fan 13. With this structure, the AC current output by the frequency conversion circuit 12 drives the fan 13 and the load blades 14 to rotate at a predetermined speed. Furthermore, the fan 13 is equipped with voltage sensors 15a, 15b, and 15c for detecting the terminal voltage. The motor induced voltage is obtained based on the detected values.

[0079] like Figure 9 The following is an example characteristic diagram of the voltage sensor detection value in the drive unit of the air conditioner in this application. The fan blades and the motor can be Figure 8 The driving circuit shown drives the rotation, Figure 7 During the time period t1 to t2 and t3 to t4, the drive is stopped to allow the motor to run by inertia. At the time period t2 and t4, the drive needs to be restarted. Therefore, it is necessary to detect the motor phase when the drive is restarted. In this embodiment, the air conditioner Figure 9 As shown, restarting is achieved by detecting the phase of the motor terminal voltage. Specifically, the three-phase terminal voltages U, V, and W of the motor rotate as an AC waveform based on a sine wave, the average value of Va, Vb, and Vc. Va, Vb, and Vc are half the DC voltage. The terminal voltage during coasting operation is equivalent to the induced voltage generated by the fan's rotation. Therefore, by detecting the motor terminal voltage and determining the fan phase based on the timing (shown as t10 to t15 in the figure), the fan can be restarted based on the phase. This allows for a smooth restart from coasting operation by resuming drive based on the phase.

[0080] Based on the above implementation, an embodiment of the present application further provides an air conditioner, comprising an indoor unit and an outdoor unit, the indoor unit comprising a controller, a human body sensor, an air guide vane motor, and a fan, the controller being electrically connected to the human body sensor, the air guide vane motor, and the fan, respectively; the human body sensor being mounted on the housing of the indoor unit; wherein, when the human body sensor detects a human body signal, the controller is configured to control the air guide vane motor and / or the fan to stop operating; and when the signal detection is complete, the controller is further configured to control the air guide vane motor and / or the fan to operate. As one implementation, the human body sensor may be a millimeter-wave radar.

[0081] In the air conditioner provided in the present application, human body signal detection is performed when the fan and the air guide blade motor stop working, so that vibration interference is avoided during detection and the detection accuracy is higher.

[0082] Among them, an air intake is set in the middle position of the air conditioner indoor unit, air outlets are set around the air intake, and air guide blades are set at the air outlet position. The air guide blades are connected to the wind guide plate motor to drive the air guide blades to rotate through the air guide blade motor.

[0083] As an implementation, the human body sensor is further connected to the rotating shaft of the motor, and the air conditioner indoor unit also includes a housing that is disposed over the sensor. The motor is configured to rotate the human body sensor, and when the human body sensor detects a human body signal, the motor stops operating. The air conditioner indoor unit also includes a drive unit, which includes a rectifier circuit, a frequency conversion circuit, and a sampling circuit. The rectifier circuit is configured to connect to an AC power source and is electrically connected to the frequency conversion circuit. The frequency conversion circuit is electrically connected to the fan via three phase lines to drive the fan. The sampling circuit is electrically connected to each of the three phase lines and is configured to sample the voltages of the three phase lines.

[0084] Taking millimeter wave radar as an example, please refer to Figure 10 The millimeter-wave radar 20 is arranged on a rotating shaft 22 driven by a motor 23 and can rotate 360 ​​degrees. The motor can be a wind guide blade motor or an independently arranged motor, which is not limited here. In addition, the millimeter-wave radar is provided with a trumpet-shaped casing 21 with a large angle θ1 made of a material that does not allow radio waves to pass through the direction of its sensor detection. The angle θ1 is combined with the detection area range. The above structure can further improve the directionality of the sensor. The millimeter-wave radar is set in the indoor unit of the air conditioner and can perform a 360-degree scan of the room from the ceiling to detect users.

[0085] The rotating shaft 22 is driven by a motor 23, which causes the sensor to vibrate during operation. This can cause interference in the detected value, leading to errors in user information and inability to accurately control the air conditioner. Therefore, when the millimeter-wave radar 20 is used for detection, the motor 23 stops operating, thereby obtaining more accurate user information and achieving more precise air conditioner control.

[0086] In summary, the present application provides an air conditioner and a control method thereof, the method being applied to a controller of an indoor unit of the air conditioner, the indoor unit of the air conditioner further comprising a human body sensor, an air guide blade motor, and a fan, the controller being electrically connected to the human body sensor, the air guide blade motor, and the fan, respectively; when the human body sensor detects a human body signal, the air guide blade motor and / or the fan are controlled to stop working; and when the signal detection is complete, the air guide blade motor and / or the fan are controlled to operate. Because the present application directly controls the air guide blade motor and / or the fan to stop working when the human body sensor is used for data detection, vibration is avoided during detection, thereby making the data detected by the human body sensor more accurate.

[0087] Although the present application is disclosed as above, the present application is not limited thereto. Any person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application shall be based on the scope defined by the claims.

Claims

1. A method for controlling an air conditioner, characterized in that: A controller (110) is applied to an indoor unit of an air conditioner, the indoor unit further comprising a human body sensor (120), an air guide blade motor (130), and a fan (140), the controller (110) being electrically connected to the human body sensor (120), the air guide blade motor (130), and the fan (140), respectively; the method comprising: When the human body sensor (120) detects a human body signal, the air guide blade motor (130) and / or the fan (140) are controlled to stop working, thereby reducing vibration of the air conditioner and improving the detection accuracy of the human body sensor (120); When the signal detection is completed, the air guide blade motor (130) and / or the fan (140) are controlled to operate.

2. The air conditioner control method according to claim 1, wherein: The step of controlling the fan (140) to stop working comprises: Controlling to stop transmitting a driving current to the fan (140) within a preset time period, wherein the fan (140) rotates by inertia and does not stop within the preset time period; The steps of controlling the operation of the fan (140) include: After the preset time period has passed, the driving current is transmitted to the fan (140) again.

3. The air conditioner control method according to claim 1, wherein: The steps of controlling the operation of the fan (140) include: Obtaining the three-phase terminal voltage of the wind turbine (140) at a preset time length; Determining the phase of the fan (140) according to the three-phase terminal voltage under the preset time length; The operation of the fan (140) is controlled according to the phase of the fan (140).

4. The air conditioner control method according to claim 1, wherein: When the human body sensor (120) detects a human body signal, the step of controlling the air guide blade motor (130) and / or the fan (140) to stop working comprises: When the angle of the wind guide blade is 90° and / or 0°, the human body sensor (120) is used to detect a human body signal, and the fan (140) is controlled to stop working.

5. The air conditioner control method according to claim 1, wherein: After the signal detection is completed, after the step of controlling the operation of the air guide blade motor (130) and / or the fan (140), the method further comprises: After a preset time, the human body sensor (120) is used again to detect human body signals.

6. An air conditioner, characterized in that: The invention comprises an air conditioner indoor unit, the air conditioner indoor unit comprising a controller (110), a human body sensor (120), an air guide blade motor (130) and a fan (140), the controller (110) being electrically connected to the human body sensor (120), the air guide blade motor (130) and the fan (140), respectively; the human body sensor (120) being mounted on a housing of the air conditioner indoor unit; wherein, When the human body sensor (120) detects a human body signal, the controller (110) is used to control the air guide blade motor (130) and / or the fan (140) to stop working, so as to reduce the vibration of the air conditioner and improve the detection accuracy of the human body sensor (120); When the signal detection is completed, the controller (110) is further used to control the operation of the air guide blade motor (130) and / or the fan (140).

7. The air conditioner according to claim 6, characterized in that The human body sensor includes millimeter wave radar.

8. The air conditioner according to claim 6, characterized in that The human body sensor (120) is also connected to the rotating shaft of the motor, and the air conditioner indoor unit further comprises a casing, which is arranged outside the sensor; wherein, The motor is used to drive the human body sensor (120) to rotate, and when the human body sensor (120) detects a human body signal, the motor stops working.

9. The air conditioner according to claim 6, characterized in that The air conditioner indoor unit further includes a driving unit, which includes a rectifier circuit, a frequency conversion circuit, and a sampling circuit. The rectifier circuit is used to connect to an AC power supply and is electrically connected to the frequency conversion circuit. The frequency conversion circuit is electrically connected to the fan (140) through three phase lines to drive the fan (140) to work. The sampling circuit is electrically connected to the three phase lines respectively and is used to sample the voltages of the three phase lines.

10. The air conditioner according to claim 6, characterized in that An air intake is provided in the middle of the air conditioner indoor unit, air outlets are provided around the air intake, and air guide blades are provided at the air outlet positions. The air guide blades are connected to the air guide blade motor (130) so as to drive the air guide blades to rotate via the air guide blade motor (130).

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