WO2021190219A1

WO2021190219A1 - Air conditioner indoor unit and control method therefor

Info

Publication number: WO2021190219A1
Application number: PCT/CN2021/077275
Authority: WO
Inventors: 李文博; 陈会敏; 赵妮妮; 王景; 杜亮; 王博鹏
Original assignee: 青岛海尔空调器有限总公司; 海尔智家股份有限公司
Priority date: 2020-03-27
Filing date: 2021-02-22
Publication date: 2021-09-30
Also published as: CN111442466A; CN111442466B

Abstract

Disclosed are an air conditioner indoor unit and a control method therefor. An infrared detector (200) is arranged on the indoor unit (10). The control method comprises: acquiring a wake-up instruction for an infrared detector (200) (S302); driving the infrared detector (200) to emit an infrared ray towards a target user (S304); acquiring a reflection attenuation signal of the infrared ray emitted by the infrared detector (200) (S306); when the reflection attenuation signal exceeds a pre-set attenuation threshold, determining the body posture of the target user (S308); and when the body posture of the target user is a first posture, driving the indoor unit (10) to send a first prompt signal (S310).

Description

Indoor unit of air conditioner and control method thereof

Technical field

The invention relates to smart home appliances, in particular to an indoor unit of an air conditioner and a control method thereof.

Background technique

In the field of smart home appliances, it is essential to create a safe and comfortable living environment. "Safety and comfort" involves not only the management of air comfort, but also the monitoring and handling of user accidents, such as accidental falls.

However, some of the air conditioners in the prior art only have the function of adjusting the air temperature and humidity, and cannot properly respond to unexpected events by users. The air conditioner has a single function and low intelligence, which can no longer meet the needs of current users. Consumers need to install additional monitoring equipment such as cameras to monitor the living environment. This is not only costly, but also infringes on privacy and brings users to their daily lives. Cause a lot of inconvenience.

Therefore, how to use a simple method to make the air conditioner have a monitoring function for the accidental fall of the user has become a technical problem to be solved urgently by those skilled in the art.

Summary of the invention

An object of the present invention is to provide an indoor unit of an air conditioner and a control method thereof that solves at least any one of the above technical problems.

A further object of the present invention is to enable the indoor unit of the air conditioner to have a monitoring function for the accidental fall of the user, and to improve the degree of intelligence.

A further object of the present invention is to reduce the manufacturing cost of an indoor unit of an air conditioner with an accidental fall monitoring function.

A further object of the present invention is to enable the indoor function of the air conditioner to reduce the discomfort of the user accidentally falling.

According to one aspect of the present invention, there is provided a control method of an indoor unit of an air conditioner, wherein an infrared detector is provided on the indoor unit, and the control method includes: acquiring a wake-up instruction of the infrared detector; driving the infrared detector to emit infrared rays to a target user ; Obtain the infrared reflection attenuation signal emitted by the infrared detector; when the reflection attenuation signal exceeds the preset attenuation threshold, determine the body posture of the target user; when the body posture of the target user is the first posture, drive The indoor unit sends out the first prompt signal.

Optionally, in the case that the reflection attenuation signal exceeds the preset attenuation threshold, the step of determining the body posture of the target user includes: recalling the reflection attenuation signal within a first set period before the reflection attenuation signal exceeds the preset attenuation threshold The signal change curve that changes with time; the body posture of the target user is determined according to the signal change curve.

Optionally, the step of determining the body posture of the target user according to the signal variation curve includes: matching the signal variation curve with a plurality of preset characteristic curves; each characteristic curve corresponds to a body posture of the target user; and according to the matching result Get the body posture of the target user.

Optionally, the indoor unit is also provided with a noise detector, which is configured to detect the decibel value of noise in the working environment of the indoor unit every preset time when the infrared detector emits infrared rays to the target user, and when the reflected attenuation signal exceeds the preset attenuation In the case of the threshold value, the step of determining the body posture of the target user includes: determining the body posture of the target user according to the noise decibel value.

Optionally, the step of determining the body posture of the target user according to the noise decibel value includes: recalling the noise decibel value within a second set time period before the reflection attenuation signal exceeds the preset attenuation threshold to obtain an observation data table; and calculating the observation data table The maximum value and average value within; the average value is the arithmetic average of noise decibel values other than the maximum value in the observation data table; the body posture is determined according to the difference between the maximum value and the average value.

Optionally, the step of determining the body posture according to the difference between the maximum value and the average value includes: judging whether the difference exceeds a preset difference threshold; if so, determining the body posture of the target user as the first posture.

Optionally, the step after driving the indoor unit to send the first prompt signal further includes: in the case that the indoor unit does not receive the feedback signal for the first prompt signal, driving the indoor unit to send the second prompt signal.

Optionally, after the step of driving the indoor unit to send the first prompt signal, the control method further includes: acquiring the location of the target user; determining the air supply angle of the indoor unit according to the location of the target user; driving the indoor unit to supply air according to the air supply angle .

Optionally, the step of determining the air supply angle of the indoor unit according to the location of the target user includes: determining the offset angle of the target user relative to the indoor unit according to the location of the target user; and determining the air supply angle of the indoor unit according to the offset angle.

According to another aspect of the present invention, there is also provided a control device including: a processor and a memory, and a control program is stored in the memory. When the control program is executed by the processor, it is used to implement的控制方法。 Control methods.

The indoor unit of the air conditioner and the control method thereof of the present invention can use an infrared detector to emit infrared rays to the target user, and can obtain the body posture of the target user when the reflected attenuation signal of the infrared rays emitted by the infrared exceeds the preset attenuation threshold. , And when the body posture of the target user is the first posture, the indoor unit is driven to send a first prompt signal, where the first posture can be set according to actual needs, for example, it can be a falling posture, so that the present invention The indoor unit of the air conditioner can monitor the user's accidental fall event, integrate the air conditioning function and the accidental fall monitoring function, and improve the degree of intelligence.

Further, in the air conditioner indoor unit and control method thereof of the present invention, when the reflected attenuation signal exceeds the attenuation threshold, the indoor function can call the signal variation curve of the reflected attenuation signal with time, and can preset the signal variation curve according to the signal variation curve. The result of matching between the characteristic curves directly obtains the body posture of the target user. The indoor unit of the air conditioner of the present invention can determine the body posture of the target user only according to the reflection attenuation signal of the infrared detector, the method is simple, no monitoring device such as a camera is required, and the manufacturing cost is saved.

Furthermore, the air conditioner indoor unit and control method thereof of the present invention can determine the air supply angle of the indoor unit according to the position of the target user when the body posture of the target user is determined to be the first posture, and drive the indoor unit according to Air supply angle Air flow, where the air supply angle of the indoor unit can be determined according to the "wind avoiding people mode" or the "wind blowing people mode". The specific air supply mode and the air supply temperature of the indoor unit can be determined by The user presets it in advance, or it can be automatically determined by the indoor unit according to the working environment temperature. When it is detected that the target user falls down unexpectedly, the indoor unit is driven to supply air according to the air supply angle, so that the indoor unit of the air conditioner of the present invention can alleviate the uncomfortable feeling of the user who accidentally falls.

Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will better understand the above and other objectives, advantages and features of the present invention.

Description of the drawings

Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary but not restrictive manner with reference to the accompanying drawings. The same reference numerals in the drawings indicate the same or similar components or parts. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the attached picture:

Fig. 1 is a schematic diagram of an indoor unit of an air conditioner according to an embodiment of the present invention;

Fig. 2 is a schematic block diagram of an indoor unit of an air conditioner according to an embodiment of the present invention;

Fig. 3 is a schematic diagram of a control method of an indoor unit of an air conditioner according to an embodiment of the present invention;

4 is a schematic diagram of a working scene of an indoor unit of an air conditioner according to an embodiment of the present invention;

Fig. 5 is another schematic diagram of a working scene of an indoor unit of an air conditioner according to an embodiment of the present invention;

Fig. 6 is a control flowchart of an indoor unit of an air conditioner according to an embodiment of the present invention;

Fig. 7 is a control flowchart of an indoor unit of an air conditioner according to another embodiment of the present invention.

Detailed ways

Fig. 1 is a schematic diagram of an air conditioner indoor unit 10 according to an embodiment of the present invention, and Fig. 2 is a schematic block diagram of an air conditioner indoor unit 10 according to an embodiment of the present invention.

The indoor unit 10 of the air conditioner in this embodiment may be a vertical type, such as a square cabinet or a circular cabinet. In other optional embodiments, the air conditioner indoor unit 10 may also be wall-mounted, but is not limited to this. Fig. 1 only uses the vertical air conditioner indoor unit 10 for illustration. Those skilled in the art should be fully capable of expanding upon understanding this embodiment, and no examples are given here.

The indoor unit 10 and the outdoor unit of the air conditioner are effectively coordinated to complete the cooling and heating cycle of the air conditioner, thereby realizing the cooling and heating regulation of the indoor temperature.

The air conditioner indoor unit 10 may generally include an infrared detector 200 and a control device 400. The indoor unit 10 may further include: a casing 101, and a heat exchanger and a fan arranged in the casing 101.

The casing 101 can be provided with an air inlet and an air outlet. The heat exchanger exchanges heat with the air flowing through it to change the temperature of the air flowing through it. The fan causes the external air entering the casing 101 from the air inlet to flow through the heat exchanger, and causes the heat exchange airflow after the heat exchange by the heat exchanger to flow toward the air outlet, thereby discharging the heat exchange airflow to the working environment of the indoor unit 10. A swing blade 102 may be provided at the air supply opening for controlled swing to adjust the air supply angle.

An infrared detector 200 is provided on the indoor unit 10 of this embodiment. The infrared detector 200 is a sensor that uses infrared rays for data processing. Infrared light, also known as infrared light, has reflective properties.

The infrared detector 200 can be installed on the casing 101. For example, the infrared detector 200 can be installed at a set height of the front panel of the casing 101. Among them, the set height is relative to the level ground of the working environment where the indoor unit 10 is located. The set height can be preset according to actual needs, and can be any value in the range of 30 cm to 60 cm, for example, it can be 30 cm, 40 cm, 50 cm, or 60 cm.

The infrared detector 200 may include a transmitting module for emitting infrared rays, a receiving module for receiving reflected infrared rays reflected by obstacles, and an analysis module. The analysis module can obtain the reflection attenuation signal according to the signal strength of the emitted infrared rays and the signal strength of the reflected infrared rays. The infrared detector 200 is configured to emit infrared rays in a horizontal direction. Among them, the "horizontal direction" is the direction parallel to the horizontal ground of the working environment.

For the indoor unit 10 of the wall-mounted air conditioner, the infrared detector 200 can be installed separately from the cabinet 101.

The indoor unit 10 may be provided with a detection device for detecting the location of the target user and obtaining relevant information. The target user (hereinafter referred to as "user") may be a preset user. The detection device can be arranged on the casing 101. In other embodiments, the indoor unit 10 may also obtain the location of the target user through other external detection devices.

The detection device may have a plurality of different detection units, and each detection unit has a detection function. In this embodiment, the detection device may also be used to detect the number of users and/or human body characteristics.

The control device 400 has a memory 420 and a processor 410. The memory 420 stores a control program 421. The control program 421 is used to implement the control method of the air conditioner indoor unit 10 in any of the following embodiments when executed by the processor 410. The processor 410 may be a central processing unit (CPU), or a digital processing unit (DSP), or the like. The memory 420 is used to store a program executed by the processor 410. The memory 420 may be any medium that can be used to carry or store desired program codes in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto. The memory 420 may also be a combination of various memories 420. Since the control program 421 is executed by the processor 410 to implement each process of the following method embodiments, and can achieve the same technical effect, in order to avoid repetition, details are not repeated here.

FIG. 3 is a schematic diagram of a control method of the indoor unit 10 of an air conditioner according to an embodiment of the present invention. The control method of the indoor unit 10 of the air conditioner may generally include:

Step S302: Acquire a wake-up instruction of the infrared detector 200.

Before the infrared detector 200 is awakened, it may be in a shutdown state. The wake-up instruction may include at least an automatic wake-up instruction issued by the indoor unit 10 itself and a manual wake-up instruction issued by the user received by the indoor unit 10 to instruct the indoor unit 10 to switch the infrared detector 200 to the operating state.

The automatic wake-up instruction may be issued by the indoor unit 10 when the detection device detects that there is only the target user in the working environment. The manual wake-up instruction can be issued by the user by voice or by triggering a corresponding button on the remote control board matched with the indoor unit 10.

After the infrared detector 200 is awakened, the indoor unit 10 can drive the detection device to detect the location of the target user.

In step S304, the infrared detector 200 is driven to emit infrared rays to the target user. The indoor unit 10 can determine the deviation angle of the target user relative to the indoor unit 10 according to the position of the target user, and determine the emission angle of the infrared detector 200 according to the deviation angle, and then drive the infrared detector 200 to emit horizontally to the target user according to the emission angle infrared. Among them, "horizontal direction" refers to the direction parallel to the surface of the working environment.

In some optional embodiments, the entire casing 101 may be substantially in the shape of a rectangular parallelepiped. The infrared detector 200 can be arranged in the middle position of the front panel of the casing 101. A rectangular coordinate system can be preset on the surface of the working environment. The projection of the geometric center of the bottom plate of the casing 101 on the ground may be the origin of the coordinate system, and the direction perpendicular to the plane of the front panel of the casing 101 and pointing to the front of the casing 101 may be the extension direction of the longitudinal coordinate axis. The direction perpendicular to the longitudinal coordinate axis and pointing to the side of the casing 101 may be the extension direction of the horizontal coordinate axis. The location of the target user refers to the coordinates of the target user. According to the coordinates of the target user, the deviation angle of the target user from the indoor unit 10 in the horizontal direction can be directly calculated. The deviation angle of the target user from the indoor unit 10 in the horizontal direction may be roughly the deviation angle of the target user relative to the infrared detector 200. The emission angle of the infrared detector 200 is determined according to the deviation angle, so that the infrared rays are emitted horizontally toward the target user.

In other optional embodiments, the detection device on the indoor unit 10 may be omitted. The infrared detector 200 may further include a detection module, which can detect the infrared rays emitted by the target user, and obtain the location of the target user according to the signal characteristics of the infrared rays.

Step S306: Obtain the infrared reflection attenuation signal emitted by the infrared detector 200.

Fig. 4 is a schematic diagram of a working scene of an indoor unit 10 of an air conditioner according to an embodiment of the present invention. The arrow in the figure shows the direction of infrared emission. In this working scenario, the target user is in a normal posture.

After the transmitting module of the infrared detector 200 emits infrared rays to the target user, the infrared rays can be reflected on the body of the target user and be folded back to the receiving module. The analysis module can retrieve the signal strength of the reflected infrared rays and the signal strength of the emitted infrared rays received by the receiving module, and obtain the reflected attenuation signal according to the difference between the two signal strengths. The control device 400 of the indoor unit 10 can directly retrieve the reflection attenuation signal detected by the analysis module. In other optional embodiments, the analysis module may be omitted, and the indoor unit 10 may drive the control device 400 to directly obtain the signal strength of reflected infrared rays and the signal strength of emitted infrared rays, and calculate the reflected attenuation signal.

Step S308, in the case that the reflected attenuation signal exceeds the preset attenuation threshold, obtain the body posture of the target user.

Fig. 5 is another schematic diagram of the working scene of the indoor unit 10 of the air conditioner according to an embodiment of the present invention. The arrow in the figure shows the direction of infrared emission. In this work scenario, the target user is in a falling posture.

Under normal circumstances, the target user's location may change during activities in the work environment. For example, the target user may gradually move away from or approach the infrared detector 200 gradually. The body posture of the target user during activities in the work environment may also change, and the body posture may at least include a preset normal posture and a falling posture. For example, the target user may be in a normal posture during normal activities, and the target user may be in a fall posture when the target user falls due to an accident.

The intensity of the reflection attenuation signal changes correspondingly with the change of the target user's position, for example, it may increase when the target user is far away from the infrared detector 200. The attenuation threshold can be preset according to actual conditions such as the size of the working environment. When the target user is in a normal posture, changes in its position may cause the reflected attenuation signal to exceed the preset attenuation threshold. For example, when the distance between the target user's location and the infrared detector 200 exceeds the set distance, the reflected attenuation signal may exceed the attenuation threshold. When the distance between the target user's location and the infrared detector 200 exceeds the set distance, it can indicate that the target user has left the work environment.

Since the infrared detector 200 has a set height and emits infrared rays toward the target user in a horizontal direction, when the target user is in a falling posture, his body will be close to the ground, and the target user's body height will drop below the set height, resulting in the infrared detector The infrared light emitted by the 200 is not blocked by the target user and continues to be emitted forward, so that the signal strength of the reflected infrared light reflected by other obstacles back to the receiving module is reduced, causing the reflected attenuation signal to exceed the attenuation threshold.

Therefore, the reflection attenuation signal exceeds the attenuation threshold for at least two reasons: one is that the target user is in a normal posture and the target user is far away from the infrared detector 200, and the other is that the target user changes from a normal posture to a falling posture.

In some optional embodiments, when the reflection attenuation signal exceeds the preset attenuation threshold, the step of determining the body posture of the target user may include: recalling the first setting before the reflection attenuation signal exceeds the preset attenuation threshold. The signal variation curve of the reflected attenuation signal in the time period changes with time, and the body posture of the target user is determined according to the signal variation curve. Wherein, the step of determining the body posture of the target user according to the signal variation curve may include: matching the signal variation curve with a plurality of preset characteristic curves; each characteristic curve corresponds to a body posture of the target user, which is obtained according to the matching result The body posture of the target user.

The time corresponding to when the reflection attenuation signal exceeds the preset attenuation threshold is the end of the first set duration. The reflection attenuation signal within the first set period before the reflection attenuation signal exceeds the preset attenuation threshold includes the reflection attenuation signal when the reflection attenuation signal exceeds the preset attenuation threshold. The infrared detector 200 may emit infrared rays once every third set time period. The third set time period is less than the first set time period. The third preset duration can be any value in the range of 0.1s to 1s, for example, it can be but not limited to 0.5s. The first set duration can be any value in the range of 1s to 60s, for example, it can be, but not limited to, 1s, 5s, 10s, or 60s.

The falling posture may be the first posture, and the normal posture may be the second posture. Since there may be multiple reasons for the reflection attenuation signal to exceed the attenuation threshold, it is necessary to determine the body posture of the target user first, and then respond according to the body posture of the target user. If it is determined that the body posture of the target user is the first posture, it indicates that the target user has accidentally fallen, and the indoor unit 10 needs to send a prompt signal. If it is determined that the body posture of the target user is the second posture, it indicates that the target user has not accidentally fallen, but has left the working environment, the indoor unit 10 does not need to send a prompt signal, and the infrared detector 200 can be shut down.

The preset characteristic curve may include at least a first characteristic curve and a second characteristic curve. Wherein, the reflection attenuation signal in the first characteristic curve changes gradually and gently with time, and the reflection attenuation signal in the second characteristic curve has a sharp increase peak at the end of the first set duration. If the reflection attenuation signal exceeds the attenuation threshold because the target user is in the second posture and the target user is far away from the infrared detector 200, the reflection attenuation signal in the signal variation curve gradually increases or decreases gradually over time. The time signal variation curve can be matched with the first characteristic curve. And when the reflected attenuation signal exceeds the attenuation threshold, the target user leaves the work environment. If the cause of the reflection attenuation signal exceeding the attenuation threshold is that the target user changes from the second posture to the first posture, the signal strength of the reflection attenuation signal in the signal variation curve when the attenuation threshold is exceeded suddenly increases. At this time, the signal variation curve can be compared with the attenuation threshold. The second characteristic curve matches.

Using the above method, the indoor unit 10 of the air conditioner of this embodiment can retrieve the signal variation curve of the reflection The matching result between the set characteristic curves directly obtains the body posture of the target user, the method is simple, no monitoring device such as a camera is installed, and no complicated calculation is required, which saves manufacturing costs.

In other optional embodiments, the body posture of the target user can also be determined according to the noise decibel value detected by the noise detector. The indoor unit 10 may also be provided with a noise detector, which is configured to detect the noise decibel value of the working environment of the indoor unit 10 every preset time when the infrared detector 200 emits infrared rays to the target user, and when the reflected attenuation signal exceeds the preset attenuation In the case of a threshold value, the step of determining the body posture of the target user may include: determining the body posture of the target user according to the noise decibel value.

Among them, the step of determining the body posture of the target user according to the noise decibel value includes: recalling the noise decibel value in the second set period before the reflection attenuation signal exceeds the preset attenuation threshold to obtain the observation data table, and calculating the value in the observation data table Maximum value and average value; the average value is the arithmetic average of noise decibel values other than the maximum value in the observation data table; the body posture is determined according to the difference between the maximum value and the average value. The step of determining the body posture according to the difference between the maximum value and the average value includes: judging whether the difference exceeds a preset difference threshold, and if so, determining that the body posture of the target user is the first posture. The maximum value refers to the maximum value of the reflection attenuation signal in the observation data table.

The time corresponding to when the reflection attenuation signal exceeds the preset attenuation threshold is the end of the second set duration. The noise decibel value in the second set period before the reflection attenuation signal exceeds the preset attenuation threshold includes the reflection attenuation signal when the reflection attenuation signal exceeds the preset attenuation threshold. The preset time is less than the second set time period. The preset time can be any value in the range of 0.1s to 1s, for example, it can be but not limited to 0.5s. The second set duration can be any value in the range of 1s to 60s, for example, it can be, but not limited to, 1s, 5s, 10s, or 60s.

During the accidental fall of the target user, a loud noise will generally be generated. According to the difference between the maximum value and the average value in the observation data table, it can be determined whether the noise decibel value during the second set time has a sharp increase. If the above difference exceeds the preset difference threshold, it indicates that there is a sharp increase. The increase phenomenon indicates that the noise decibel value within the second set time period has an abnormal maximum value, and it can be inferred that the target user has accidentally fallen. If the above difference does not exceed the preset difference threshold, it indicates that there is no sharp increase, indicating that the noise decibel value within the second set time period has no abnormal maximum value, and it can be inferred that the target user did not accidentally fall.

The air conditioner indoor unit 10 of this embodiment can determine the body posture of the target user according to the reflected attenuation signal detected by the infrared detector 200, or can also determine the body posture of the target user according to the noise decibel value detected by the noise detector, and detect The diversification of methods solves the problem of "inaccurate measurement" caused by the single detection method to a certain extent.

In some optional embodiments, when the body posture of the target user is determined to be the first posture according to the reflected attenuation signal, and the body posture of the target user is determined to be the first posture according to the noise decibel value, then Finally, the body posture of the target user is determined as the first posture, and the two detection methods are combined to improve the reliability of the detection result.

In step S310, when the body posture of the target user is the first posture, the indoor unit 10 is driven to send a first prompt signal. The first prompt signal may be a voice query signal, which is used to query the physical state of the target user. For example, the first prompt signal can be, but is not limited to, "how are you", "do you need help" and so on.

The step after driving the indoor unit 10 to send the first prompt signal further includes: in the case where the indoor unit 10 does not receive the feedback signal for the first prompt signal, driving the indoor unit 10 to send the second prompt signal. The second prompt signal may be a call signal, which is used to send information to the emergency contact of the target user to respond to accidental falls in time and prevent adverse consequences. The second prompt signal may also be an alarm signal sent to the working environment to attract the attention of other users outside the working environment. The second prompt signal may also be a distress signal sent by the indoor unit 10 to the hospital in the residential area of the target user.

The target user can give feedback after the indoor unit 10 sends the first prompt signal, and the feedback form can be, but is not limited to, voice response. The feedback signal for the first prompt signal may be, but is not limited to, "I'm fine", "No help needed", etc.

When the indoor unit 10 receives the feedback signal for the first prompt signal, it indicates that the physical condition of the target user is good, and there is no need to send the second prompt signal.

In other optional embodiments, after the step of driving the indoor unit 10 to send the first prompt signal, the control method further includes: acquiring the position of the target user, determining the air supply angle of the indoor unit 10 according to the position of the target user, and driving The indoor unit 10 blows air according to the blow angle. The step of determining the air blowing angle of the indoor unit 10 according to the location of the target user includes: determining the offset angle of the target user relative to the indoor unit 10 according to the location of the target user, and determining the air blowing angle of the indoor unit 10 according to the offset angle.

The location of the target user may be coordinates, and the offset angle of the target user relative to the indoor unit 10 can be directly calculated according to the coordinates of the target user. The deviation angle is the vector sum of the deviation angle of the target user from the indoor unit 10 in the horizontal direction and the deviation angle of the target user from the indoor unit 10 in the vertical direction. The deviation angle of the target user from the indoor unit 10 in the vertical direction refers to the deviation angle of the target user's projection on the ground relative to the air outlet of the indoor unit 10. The deviation angle of the target user from the indoor unit 10 in the vertical direction can be calculated according to the distance of the target user relative to the indoor unit 10 and the vertical height of the geometric center of the air outlet. The distance between the target user and the indoor unit 10 can be calculated according to the coordinates. The vertical height of the geometric center of the air outlet is relative to the ground and is a fixed value.

After the offset angle is determined, the air supply angle of the indoor unit 10 is determined according to the offset angle. The air supply mode of the indoor unit 10 may be preset with a "wind avoiding people mode" (that is, the air flow is blown in a manner avoiding the target user) and a "wind blowing mode" (that is, the air flow is blowing directly on the target user). Way to blow). Among them, the air supply angle of the indoor unit 10 can be determined according to the "wind avoiding people mode" or the "wind blowing people mode". The specific air supply mode, the air supply temperature and the temperature adjustment mode of the indoor unit 10 can be determined by the user Presetting in advance may also be automatically determined by the indoor unit 10 according to the temperature of the working environment.

For example, in spring, autumn, and winter conditions, the temperature adjustment mode, air supply temperature and air supply mode can be preset. The temperature adjustment mode of the indoor unit 10 may be a heating mode. The air supply temperature can be set to any value in the range of 26°C to 30°C, and the air supply mode can be set to "wind blowing mode". At this time, the step of determining the air supply angle of the indoor unit 10 according to the offset angle includes: adjusting the swing blade 102 according to the offset angle, so that the location of the target user is located in the wind outlet direction of the swing blade 102. After the air supply angle is determined, the indoor unit 10 is driven to enter the heating mode according to the air supply temperature, so that the air flow is blown toward the target user or where the target user is located, which can prevent the target user from falling down due to prolonged contact with the ground. Caught with a cold can alleviate the discomfort of accidentally falling users, and improve the degree of intelligence and humanization of the indoor unit 10.

Under summer conditions, the temperature adjustment mode, air supply temperature and air supply mode can also be preset. The temperature adjustment mode of the indoor unit 10 may be a cooling mode. The air supply temperature can be set to any value within the range of 26°C to 30°C, and the air supply mode can be set to "wind avoiding people mode". At this time, the step of determining the air supply angle of the indoor unit 10 according to the offset angle includes: adjusting the swing blade 102 according to the offset angle, so that the target user's position avoids the wind direction of the swing blade 102. After the air supply angle is determined, the indoor unit 10 is driven to enter the cooling mode according to the air supply temperature, so that the air flow is blown toward the working environment avoiding the target user. Since the supply air temperature can be preset by the user according to the actual physical condition of the target user, when it is detected that the target user accidentally falls, the indoor unit 10 is driven to cool according to the supply air temperature and the "wind avoidance mode", which can be the target The user creates an environment with a suitable temperature, which is beneficial to alleviate or relieve discomfort.

Fig. 6 is a control flowchart of the indoor unit 10 of the air conditioner according to an embodiment of the present invention.

Step S602: Acquire a wake-up instruction of the infrared detector 200.

In step S604, the infrared detector 200 is driven to emit infrared rays to the target user.

Step S606: Obtain the infrared reflection attenuation signal emitted by the infrared detector 200.

In step S608, it is determined whether the reflection attenuation signal exceeds a preset attenuation threshold, if so, step S610 is executed, and if not, step S606 is returned to.

In step S610, the signal variation curve is retrieved. The signal variation curve is a curve of the reflection attenuation signal changing with time during the first set period before the reflection attenuation signal exceeds the preset attenuation threshold.

In step S612, the signal variation curve is matched with a plurality of preset characteristic curves. Each characteristic curve corresponds to a target user's body posture.

In step S614, it is determined whether the signal variation curve matches the first characteristic curve, if so, step S616 is executed, and if not, step S628 is executed.

Step S616: Determine the body posture of the target user as the first posture.

In step S618, the indoor unit 10 is driven to send a first prompt signal.

In step S620, if the indoor unit 10 does not receive the feedback signal for the first prompt signal, the indoor unit 10 is driven to send a second prompt signal.

Step S622: Obtain the location of the target user.

Step S624: Determine the air blowing angle of the indoor unit 10 according to the location of the target user.

In step S626, the indoor unit 10 is driven to enter the heating mode, and air is supplied according to the air supply angle.

Step S628: Determine the body posture of the target user as the second posture. At this time, the target user has left the working environment and can drive the infrared detector 200 to stop.

Fig. 7 is a control flowchart of an indoor unit 10 of an air conditioner according to another embodiment of the present invention.

Step S702: Acquire a wake-up instruction of the infrared detector 200.

In step S704, the infrared detector 200 is driven to emit infrared rays to the target user.

Step S706: Obtain the infrared reflection attenuation signal emitted by the infrared detector 200.

In step S708, it is determined whether the above-mentioned reflection attenuation signal exceeds a preset attenuation threshold, if so, step S710 is executed, and if not, step S706 is returned to.

In step S710, the signal variation curve is retrieved. The signal variation curve is a curve of the reflection attenuation signal changing with time during the first set period before the reflection attenuation signal exceeds the preset attenuation threshold.

Step S712, matching the signal variation curve with a plurality of preset characteristic curves. Each characteristic curve corresponds to a target user's body posture.

In step S714, when the signal variation curve matches the first characteristic curve, the observation data table is called. Recall the noise decibel value within the second set period before the reflected attenuation signal exceeds the preset attenuation threshold to obtain the observation data table.

Step S716: Calculate the maximum value and the average value in the observation data table.

In step S718, in the case that the difference between the maximum value and the average value exceeds the preset difference threshold, it is determined that the body posture of the target user is the first posture.

In step S720, the indoor unit 10 is driven to send a first prompt signal.

In step S722, if the indoor unit 10 does not receive the feedback signal for the first prompt signal, the indoor unit 10 is driven to send a second prompt signal.

Step S724: Obtain the location of the target user.

In step S726, the air blowing angle of the indoor unit 10 is determined according to the location of the target user.

In step S728, the indoor unit 10 is driven to enter the heating mode, and air is supplied according to the air supply angle.

Using the above method, the air conditioner indoor unit 10 of this embodiment can use the infrared detector 200 to emit infrared rays to the target user, and the target user can be determined when the reflected attenuation signal of the infrared rays emitted by the infrared exceeds the preset attenuation threshold. When the body posture of the target user is the first posture, the indoor unit 10 is driven to send a first prompt signal. The first posture can be set according to actual needs, for example, it can be a fall posture, so that Therefore, the air conditioner indoor unit 10 of this embodiment can have a monitoring function for a user's accidental fall event, integrate the air conditioning function and the accidental fall monitoring function, and improve the degree of intelligence.

So far, those skilled in the art should realize that although multiple exemplary embodiments of the present invention have been illustrated and described in detail herein, they can still be disclosed according to the present invention without departing from the spirit and scope of the present invention. The content directly determines or derives many other variations or modifications that conform to the principles of the present invention. Therefore, the scope of the present invention should be understood and deemed to cover all these other variations or modifications.

Claims

A control method of an indoor unit of an air conditioner, wherein an infrared detector is provided on the indoor unit, and the control method includes:

Acquiring a wake-up instruction of the infrared detector;

Driving the infrared detector to emit infrared rays to the target user;

Acquiring the infrared reflection attenuation signal emitted by the infrared detector;

Determining the body posture of the target user when the reflection attenuation signal exceeds a preset attenuation threshold;

When the body posture of the target user is the first posture, the indoor unit is driven to send a first prompt signal.
The control method according to claim 1, wherein the step of determining the body posture of the target user when the reflection attenuation signal exceeds a preset attenuation threshold comprises:

Retrieve a signal variation curve of the reflection attenuation signal with time during a first set time period before the reflection attenuation signal exceeds a preset attenuation threshold;

The body posture of the target user is determined according to the signal variation curve.
The control method according to claim 2, wherein the step of determining the body posture of the target user according to the signal variation curve comprises:

Matching the signal variation curve with a plurality of preset characteristic curves; each of the characteristic curves corresponds to a body posture of the target user;

The body posture of the target user is obtained according to the matching result.
The control method according to claim 1, wherein the indoor unit is further provided with a noise detector configured to detect the operation of the indoor unit every preset time when the infrared detector emits infrared rays to the target user The noise decibel value of the environment, and in the case that the reflected attenuation signal exceeds a preset attenuation threshold, the step of determining the body posture of the target user includes:

The body posture of the target user is determined according to the noise decibel value.
The control method according to claim 4, wherein the step of determining the body posture of the target user according to the noise decibel value comprises:

Retrieve the noise decibel value within a second set time period before the reflection attenuation signal exceeds the preset attenuation threshold to obtain an observation data table;

Calculate the maximum value and the average value in the observation data table; the average value is the arithmetic average of the noise decibel values in the observation data table other than the maximum value;

The body posture is determined according to the difference between the maximum value and the average value.
The control method according to claim 5, wherein the step of determining the body posture based on the difference between the maximum value and the average value comprises:

Judging whether the difference value exceeds a preset difference value threshold;

If yes, it is determined that the body posture of the target user is the first posture.
The control method according to claim 1, wherein the step after said driving said indoor unit to send out the first prompt signal further comprises:

When the indoor unit does not receive a feedback signal for the first prompt signal, driving the indoor unit to send a second prompt signal.
The control method according to claim 1, wherein, after the step of driving the indoor unit to send a first prompt signal, the control method further comprises:

Acquiring the location of the target user;

Determining the air supply angle of the indoor unit according to the location of the target user;

The indoor unit is driven to supply air according to the air supply angle.
The control method according to claim 8, wherein the step of determining the air supply angle of the indoor unit according to the location of the target user comprises:

Determining the offset angle of the target user relative to the indoor unit according to the location of the target user;

The air blowing angle of the indoor unit is determined according to the offset angle.
An indoor unit of an air conditioner, including:

A control device comprising: a processor and a memory, and a control program is stored in the memory, and when the control program is executed by the processor, it is used to implement the control method according to any one of claims 1-9 .