Radar-based fresh air control method and device for air conditioner and fresh air conditioner

Abstract

The application provides a radar-based fresh air control method and device for an air conditioner and a fresh air conditioner, the method comprising: determining a first vibration wave based on a vibration sampling signal collected by a vibration sensor on an indoor unit of the air conditioner; in a process of controlling a vibration generator to output a second vibration wave, if it is determined that current air quality data is in a target concentration interval, acquiring posture feature data of all individuals by a radar module; and in a case where the posture feature data of at least one individual meets a target condition, starting a fresh air system of the fresh air conditioner. The radar-based fresh air control method and device for the air conditioner and the fresh air conditioner can superimpose and absorb vibrations by a vibration wave emitted by a vibration emitter and a vibration wave generated by the air conditioner itself during operation, realize interception and judgment of starting of the fresh air system based on combination of the individual posture monitored by the vibration-absorbing radar and threshold comparison according to the air quality, and realize intelligent fresh air control.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioning equipment, and particularly relates to a radar-based fresh air control method and device for an air conditioner and a fresh air conditioner. BACKGROUND

[0002] With the continuous improvement of people's living standards, fresh air conditioners or other devices with fresh air functions can realize the renewal of indoor air and improve indoor air quality by introducing outdoor fresh air or discharging indoor polluted air.

[0003] The existing fresh air conditioner or other device with fresh air function is mainly controlled by the user to open and close, which is relatively subjective and often not timely. However, the more the human body moves in a closed environment, the more oxygen it needs, and if the indoor ventilation is not timely, it will cause symptoms such as chest tightness, shortness of breath, and oxygen deficiency. In the existing air conditioner intelligent control scheme based on human sensing, only the AI technology scheme based on face recognition can realize accurate personnel type judgment. However, this scheme not only needs to be equipped with a high-definition camera, but also needs to run a face recognition algorithm, which will greatly increase the manufacturing cost of the air conditioner and lead to a decline in the market competitiveness of related products.

[0004] As an alternative, radar sensing is a wireless sensing technology that can obtain vital sign data such as breathing rate, heart rate, and body movement of personnel by processing and analyzing received radar echoes with human characteristics. Millimeter wave radar is a radar that works in the millimeter wave (wavelength 1-10 mm, frequency 30-300 GHz) band for detection, which is mainly used in air conditioners to realize functions such as human arrival to start the machine, human leaving to turn off the machine, and no wind feeling. However, the vibration generated by the air conditioner during operation will affect the data collection of the radar and even cause imaging blur. The longitudinal wave of the longitudinal vibration will affect the vertical data collection of the target, and similarly, the transverse wave will affect the transverse data collection. If the amplitude is large, it will even image the stationary target as a moving target, which seriously affects the sensing accuracy of the radar on the human activity. Therefore, how to match the human activity with the fresh air supplement is an important issue that needs to be solved in the industry. SUMMARY

[0005] The present application provides a radar-based fresh air control method and device for an air conditioner and a fresh air conditioner to solve the problem of poor fresh air control accuracy caused by the vibration of the air conditioner affecting the imaging quality of the radar in the prior art.

[0006] The present application provides a radar-based fresh air control method for an air conditioner, which comprises:

[0007] Based on the vibration sampling signal collected by the vibration sensor on the indoor unit of the air conditioner, a first vibration wave is determined.

[0008] In the process of controlling the vibration generator to output the second vibration wave, if it is determined that the current air quality data is in the target concentration interval, the posture feature data of all individuals is acquired by the radar module;

[0009] In a case where it is determined that the posture feature data of at least one individual meets a target condition, a fresh air system of the fresh air conditioner is started;

[0010] The lower limit value of the target concentration interval is determined according to a standard concentration of indoor harmful gas and / or particles; the target condition is determined according to a posture feature corresponding to an action exhibited by the individual when the individual is in an environment with air quality lower than the standard; the first vibration wave and the second vibration wave have the same period and amplitude, and the phase of the first vibration wave and the phase of the second vibration wave differ by half a period; the vibration sampling signal is a vibration signal generated by the air conditioner indoor unit due to the operation of the fan in a sampling period; the vibration sensor, the radar module and the vibration generator are all arranged in the air conditioner indoor unit, the vibration sensor is used to sense the vibration condition of the air conditioner indoor unit, and the vibration generator is used to eliminate the vibration of the radar module which is driven to vibrate by the air conditioner indoor unit.

[0011] According to the radar-based fresh air control method of the air conditioner provided by the application, after the fresh air system of the fresh air conditioner is started, the method further comprises:

[0012] Based on the individual position information collected by the radar module after the vibration elimination by the second vibration wave in a preset period, an acceleration change curve is determined;

[0013] In a case where the acceleration corresponding to each time point in the acceleration change curve of each individual is not 0, the motion degree of each individual is determined based on the change trend of the acceleration change curve in the time domain;

[0014] Based on the motion degree of all individuals, a target fresh air rotating speed value is determined, so that the fan rotating speed of the fresh air system is adjusted to the target fresh air rotating speed value by the air conditioner;

[0015] The radar module after the vibration elimination by the second vibration wave is eliminated by the second vibration wave with a phase difference of half a period from the first vibration wave, so as to offset the vibration of the radar module in the air conditioner indoor unit in the first vibration wave.

[0016] According to the radar-based fresh air control method of the air conditioner provided by the application, in a case where the acceleration corresponding to each time point in the acceleration change curve of each individual is not 0, the motion degree of each individual is determined based on the change trend of the acceleration change curve in the time domain, which comprises:

[0017] In the case that the acceleration corresponding to each time point in the acceleration change curve of each individual is not 0, the cumulative time length of each acceleration interval in the acceleration change curve is taken as the time domain span value corresponding to the acceleration interval respectively;

[0018] The motion degree of the individual is determined based on the acceleration interval corresponding to the maximum time domain span value;

[0019] The acceleration interval is divided into a plurality of subintervals according to the absolute value of the acceleration, and each subinterval is provided with a new air position.

[0020] According to the radar-based air conditioner new air control method provided by the application, after the acceleration change curve is determined, the method further comprises:

[0021] If it is determined that the acceleration corresponding to each time point in the acceleration change curve of at least one individual is 0, and the speed of the individual is continuously 0, the fan speed of the new air system is adjusted to the rated minimum value.

[0022] If the acceleration corresponding to each time point in the acceleration change curve of all individuals is 0, and the instantaneous speed of each individual is not 0, the target new air speed value is determined based on the speed corresponding to the uniform motion of all individuals within a preset period, so that the fan speed of the new air system of the air conditioner is adjusted to the target new air speed value.

[0023] According to the radar-based air conditioner new air control method provided by the application, the posture feature data comprises body feature data or face feature data.

[0024] The target condition is determined according to the body feature data of the individual frequently nodding or continuously covering the mouth within a preset time length, or the face feature data of the individual yawning or frequently blinking within a preset time length.

[0025] According to the radar-based air conditioner new air control method provided by the application, the posture feature data comprises body feature data and face feature data.

[0026] The target condition is determined according to the body feature data and face feature data of the individual continuously covering the mouth or yawning within a preset time length.

[0027] According to the radar-based air conditioner new air control method provided by the application, the first vibration wave is determined based on the vibration sampling signal collected by the vibration sensor of the air conditioner indoor unit, comprising:

[0028] average sampling period is obtained according to a plurality of vibration periods contained in the vibration sampling signal, and an average sampling amplitude is obtained according to a vibration amplitude corresponding to a target sampling point in each vibration period;

[0029] The first vibration wave is generated based on the average sampling period and the average sampling amplitude;

[0030] The target sampling point includes a wave crest sampling point and a wave trough sampling point in the sampling period.

[0031] According to the radar-based air conditioner fresh air control method provided by the application, if the target sampling point is other than the wave crest sampling point and the wave trough sampling point in the vibration period, the value of the target sampling point in the time domain includes and

[0032] wherein k is a positive integer greater than 2.

[0033] The application further provides a radar-based air conditioner fresh air control device, comprising:

[0034] A radar stabilizing module is configured to determine a first vibration wave based on a vibration sampling signal collected by a vibration sensor on an air conditioner indoor unit.

[0035] A gas monitoring module is configured to obtain posture feature data of all individuals through a radar module if it is determined that the current air quality data is in a target concentration interval during control of a vibration generator to output a second vibration wave.

[0036] A fresh air control module is configured to start a fresh air system of a fresh air conditioner if posture feature data of at least one individual meets a target condition.

[0037] The lower limit of the target concentration interval is determined according to the standard concentration of indoor harmful gases and / or particles; the target condition is determined according to the posture features corresponding to the actions exhibited by individuals when they are in an environment with air quality lower than the standard; the first vibration wave and the second vibration wave have the same period and amplitude, and the phase of the first vibration wave differs from the phase of the second vibration wave by half a period; the vibration sampling signal is a vibration signal generated by the air conditioner indoor unit due to the operation of a fan in a sampling period; the vibration sensor, the radar module, and the vibration generator are all arranged in the air conditioner indoor unit, the vibration sensor is configured to sense the vibration of the air conditioner indoor unit, and the vibration generator is configured to dampen the radar module that is vibrated by the air conditioner indoor unit.

[0038] The application further provides a fresh air conditioner, comprising an air conditioner indoor unit, an air conditioner outdoor unit, and a fresh air system.

[0039] The air conditioner indoor unit comprises an air conditioner controller and a vibration damping device in communication connection, and further comprises a memory and a program or instruction stored on the memory and executable on the air conditioner controller, the program or instruction being executed by the air conditioner controller to perform the radar-based air conditioner fresh air control method according to any one of the above.

[0040] The vibration damping device comprises a radar module, a vibration generator and a vibration sensor in communication connection with the air conditioner controller respectively.

[0041] The vibration sensor is configured to sense the vibration condition of the air conditioner indoor unit, and the vibration generator is configured to damp the vibration of the radar module caused by the air conditioner indoor unit.

[0042] The radar module is a millimeter wave radar.

[0043] The application further provides a non-transitory computer readable storage medium having a computer program stored thereon, the computer program being executed by a processor to implement the radar-based air conditioner fresh air control method according to any one of the above.

[0044] The application further provides a computer program product comprising a computer program, the computer program being executed by a processor to implement the radar-based air conditioner fresh air control method according to any one of the above.

[0045] The radar-based air conditioner fresh air control method, device and fresh air conditioner provided by the application can superimpose the vibration wave emitted by the vibration emitter and the vibration wave generated by the air conditioner itself to achieve damping, so that the air conditioner radar can be stably imaged when observing, and the opening of the fresh air system is intercepted and judged based on the threshold comparison according to the air quality and the individual posture monitored by the damping radar, the behavior intention corresponding to the user posture can be referred to, the control accuracy of the fresh air system is improved, the equipment energy efficiency and user experience are considered, and the reliability and intelligence of the fresh air system are improved. BRIEF DESCRIPTION OF DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0047] Figure 1 is one of the flow schematic diagrams of the radar-based fresh air control method of the air conditioner provided by the present application;

[0048] Figure 2 is a schematic diagram of the principle of vibration damping of the radar module provided by the present application;

[0049] Figure 3 is one of the flow schematic diagrams of the radar-based fresh air control method of the air conditioner provided by the present application;

[0050] Figure 4 is a schematic diagram of the structure of the radar-based fresh air control device of the air conditioner provided by the present application;

[0051] Figure 5 is a schematic diagram of the structure of the fresh air air conditioner provided by the present application. DETAILED DESCRIPTION

[0052] To make the objectives, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below with reference to the drawings in the present application. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0053] The terms "first", "second", and the like in the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are usually a class, not limited to the number of objects, for example, the first object can be one or more.

[0054] It should be understood that the terms used in the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the present application, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms.

[0055] The terms "include" and "contain" indicate the presence of the described features, whole, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, whole, steps, operations, elements, components and / or sets thereof.

[0056] Figure 1 is one of the flow schematic diagrams of the radar-based fresh air control method of the air conditioner provided by the present application. As Figure 1As shown, the radar-based air conditioner fresh air control method provided by the embodiment of the application comprises: step 101, determining a first vibration wave based on a vibration sampling signal collected by a vibration sensor on an air conditioner indoor unit.

[0057] The first vibration wave and the second vibration wave have the same period and amplitude, and the phase of the first vibration wave and the phase of the second vibration wave differ by half a period. The vibration sampling signal is a vibration signal generated by the air conditioner indoor unit due to the operation of the fan in a sampling period. The vibration sensor, the radar module and the vibration generator are all arranged in the air conditioner indoor unit, the vibration sensor is used to perceive the vibration condition of the air conditioner indoor unit, and the vibration generator is used to eliminate the vibration of the radar module which is driven to vibrate by the air conditioner indoor unit.

[0058] It should be noted that the execution subject of the radar-based air conditioner fresh air control method is a radar-based air conditioner fresh air control device, which can be arranged in an air conditioner.

[0059] The application scenario of the radar-based air conditioner fresh air control method provided by the embodiment of the application is that, when the user activates the air conditioner, the vibration sensor is used to perceive the vibration waveform change generated by the air conditioner at different wind speeds and modes, and the vibration generator is used to emit an opposite waveform to eliminate the vibration of the radar module which is driven to vibrate, when the radar module after vibration elimination perceives the existence of an individual, the harmful gas concentration in the room and the posture information of the key parts of the human body are combined to cooperatively adjust the operation of the fresh air system and the operation mode.

[0060] The radar module and the air quality sensing module periodically collect all individuals in the room for monitoring at a specified time interval, and send the perception information of each individual to the radar-based air conditioner fresh air control device. The working period of the radar module and the air quality sensing module is not limited in the embodiment of the application.

[0061] Alternatively, the radar module and the air quality sensing module can perform collection work at their respective default working periods.

[0062] Alternatively, the user can change the working period of the radar module and / or the air quality sensing module by issuing a period change instruction, and the radar module and / or the air quality sensing module will change the working period to the period indicated by the instruction for collection work in response to the corresponding instruction.

[0063] It should be noted that before step 101, the user needs to send an activation instruction through a transmission medium to activate the working mode of the air conditioner, so that the indoor unit of the air conditioner operates at the default wind speed of the mode, and the outdoor unit operates at the default frequency of the mode.

[0064] Optionally, the user can transmit the activation instruction by the control device, adopt a wireless communication mode between the control device and the fresh air conditioner or the air conditioner system with the fresh air function, make the fresh air conditioner or the air conditioner system with the fresh air function initialize the working mode, and start the radar module.

[0065] Optionally, the user can issue the activation instruction in a voice interaction mode, the fresh air conditioner or the air conditioner system with the fresh air function receives the activation instruction, performs voice recognition, initializes the working mode, and starts the radar module.

[0066] Specifically, in step 101, the radar-based air conditioner fresh air control device controls the fan of the air conditioner indoor unit to run at the rotating speed in the mode and controls the compressor of the air conditioner outdoor unit to run at the power in the mode after receiving and responding to the activation instruction.

[0067] Since the vibration caused by the fan operation is transmitted to the air conditioner indoor unit and the internal devices thereof, the radar-based air conditioner fresh air control device periodically perceives the vibration of the air conditioner indoor unit by the vibration sensor, fits the first vibration wave for representing the vibration degree of the air conditioner according to the vibration sampling signal collected in a sampling period.

[0068] The sampling period refers to the working period of the vibration sensor, and is at least an integer multiple of the vibration period of the air conditioner, which is not limited in the embodiment of the present application.

[0069] In step 102, the posture feature data of all individuals is acquired by the radar module during the process of controlling the vibration generator to output the second vibration wave, if it is determined that the current air quality data is in the target concentration interval.

[0070] The lower limit value of the target concentration interval is determined according to the standard concentration of indoor harmful gas and / or particulate matter.

[0071] It should be noted that the types and quantities of the perception devices for collecting the air quality data are not limited in the embodiment of the present application.

[0072] Exemplarily, the perception devices can include a harmful gas sensor and / or a particulate matter sensor.

[0073] The harmful gas sensor includes but is not limited to the sensor for detecting the concentration of carbon dioxide (CO2), sulfur dioxide (SO2), nitrogen dioxide (NO2), ozone (O3), carbon monoxide (CO) and the like.

[0074] The particulate matter sensor includes but is not limited to the sensor for detecting the concentration of fine particulate matter (pm2.5), inhalable particulate matter (pm10) and the like.

[0075] Exemplarily, the sensing device can also include multiple kinds of sensing elements such as carbon dioxide sensors, pm2.5 sensors, and the like, and can also be a total volatile organic compound (TVOC) sensor with integrated monitoring functions. The radar-based air conditioner fresh air control device integrates the concentration information of harmful substances in the air collected by each sensing element to comprehensively depict the current air quality data in the room.

[0076] It should be noted that the target concentration interval refers to a concentration interval set according to industry standards for different harmful substances to cause a certain degree of pollution in the room. The lower limit value of the interval is the standard concentration of harmful gases and / or particles in the indoor space monitored by the air quality sensing module, and the upper limit value is the concentration of the corresponding harmful substance that causes a certain degree of pollution in the room, i.e., other concentration values except for severe pollution.

[0077] Specifically, in step 102, the radar-based air conditioner fresh air control device retains the period and amplitude of the first vibration wave obtained in step 101, and delays the phase by half a period to obtain a second vibration wave opposite to the waveform of the first vibration wave, and then controls the vibration generator to emit a vibration wave with the second vibration wave to continuously damp the radar module.

[0078] In the process of continuously damping the radar module by the vibration generator, the radar-based air conditioner fresh air control device compares the current air quality data with the corresponding target concentration interval:

[0079] If the current air quality data is in the target concentration interval, it means that the current air in the room is polluted, but not to the extent of severe pollution, so the radar module after damping is needed to drive to collect the position information of the key parts of the human body of each individual in the space of the air conditioner in real time, and to perform coordinate system conversion and standardization operation on the relative positions between the body parts of each individual, to obtain the posture exhibited by the human body according to the joint sequence, and output it as posture feature data.

[0080] If the current air quality data is less than the lower limit value of the target concentration interval, it means that the current air in the room is not polluted, and the fresh air system does not need to be started.

[0081] If the current air quality data is greater than the upper limit value of the target concentration interval, it means that the current pollution in the room is relatively serious, and the fresh air system does not need to be started directly in combination with the recognition of the human body posture.

[0082] The type and number of radar sensing devices in the radar module are not specifically limited in the embodiment of the application.

[0083] Exemplarily, the radar module can include a laser radar, an infrared sensor, etc.

[0084] Optionally, since the horizontal detection range of the millimeter wave radar can reach ±75°, the vertical detection range can reach ±40°, the maximum detection distance can reach 8 meters, the distance output accuracy can reach 0.1 meters, the angle output accuracy can reach 1°, and there is no privacy problem, no light influence, and the response speed is relatively fast.

[0085] Therefore, the radar-based air conditioner fresh air control device analyzes the posture of the user individual in the spatial coordinate system according to the coordinates of the human key points collected by the millimeter wave radar in the radar coordinate system.

[0086] Exemplarily, the radar module can include a laser radar, an infrared sensor, etc.

[0087] For example, the human key part coordinates of the individual in the radar coordinate system can be collected by the millimeter wave radar, and the mapping relationship between the form after the connection of multiple human parts at the same time and the human action is fitted according to a large amount of prior data, so as to directly obtain the corresponding posture feature data of the individual.

[0088] Step 103, in the case that the posture feature data of at least one individual meets the target condition, the fresh air system of the fresh air conditioner is started.

[0089] The target condition is determined according to the posture feature corresponding to the action exhibited by the individual when the individual is in an environment with air quality lower than the standard.

[0090] It should be noted that the target condition refers to the posture feature data corresponding to the specific action exhibited by the individual in the room in order to avoid excessive exposure to the polluted environment when the concentration of a certain harmful substance pollutes the room to a certain extent.

[0091] The target condition is used to determine whether the posture exhibited by the target user in the current environment conforms to the natural body reaction action of the human individual under the invasion of a certain harmful substance, or is a specific action made to cope with the invasion of a certain harmful substance.

[0092] Specifically, in step 103, the radar-based air conditioner fresh air control device compares the posture feature data collected by the damped radar module for each individual with the target conditions corresponding to various harmful substances:

[0093] If the connectivity relationship of the key body parts carried in the posture feature data of at least one individual meets the threshold set for the relevant connectivity relationship in the specific action corresponding to the target condition, it indicates that at least one individual perceives the pollution of the indoor air by the harmful substance corresponding to the target condition earlier than other individuals. Therefore, the fresh air system of the fresh air conditioner is controlled to be started only when the air quality sensing module detects that the indoor air quality is poor and the radar module determines that the posture exhibited by the human individual meets the physiological reaction exhibited in the gaseous pollution environment.

[0094] If the connectivity relationship of the key body parts carried in the posture feature data of all individuals does not meet the threshold set for the relevant connectivity relationship in the specific action corresponding to the target condition, the fresh air system is started when the air quality sensing module detects that the indoor air quality is poor, but the radar module does not monitor that the human individual exhibits the expected physiological reaction. Further judgment is made according to the specific situation of the individual to provide a theoretical basis for subsequent processing measures.

[0095] Optionally, the radar module can monitor the trend of the heart rate and respiration of the individual over time. If the trend indicates that the individual is in a healthy physiological state, it indicates that the human body has a high tolerance to the harmful substance corresponding to the target condition, even if it has caused slight pollution but does not constitute a health hazard. The fresh air system is started, and an alarm signal indicating that there is pollution in the indoor environment is also sent to the user.

[0096] Optionally, the radar module can monitor the trend of the heart rate and respiration of the individual over time. If the trend indicates that the individual is in an unhealthy physiological state, the human body has a low tolerance to the harmful substance corresponding to the target condition, even if it is slight pollution, it can cause harm to the human body in a short time, causing all individuals in the indoor environment to faint and fall to the ground. The fresh air system is started to remedy the environment, and an alarm signal indicating that there is a life-threatening situation in the indoor environment is also sent to the rescue agency.

[0097] The embodiment of the present application transmits a second vibration wave opposite to the actual first vibration wave through a vibration generator to dissipate the vibration transmitted by the air conditioner indoor unit, and when it is determined that the current air quality data indicates that there is a certain degree of pollution in the room, and the individual posture monitored by the radar module under the vibration dissipation state conforms to the natural physiological response action of the human body in the polluted environment, the new air system is started. The vibration wave emitted by the vibration transmitter and the vibration wave generated by the air conditioner itself can be superimposed to dissipate the vibration, so that the air conditioner radar can be stabilized during imaging, and the opening of the new air system is intercepted and judged based on the threshold comparison of the air quality and the individual posture monitored by the vibration dissipation radar. The behavior intention corresponding to the user posture can be referred to, which can bring certain reliability and intelligence to the control accuracy of the new air system, and the equipment energy efficiency and user experience are considered.

[0098] On the basis of any of the above embodiments, after starting the new air system of the new air conditioner, it further comprises: determining the acceleration change curve based on the individual position information collected by the radar module after dissipating the second vibration wave within a preset period.

[0099] Wherein, the radar module after dissipating the second vibration wave is through the second vibration wave with a phase difference of half a cycle from the first vibration wave, to offset the vibration of the radar module under the propagation of the air conditioner indoor unit with the first vibration wave.

[0100] It should be noted that, Figure 2 is the principle diagram of dissipating the radar module provided by the present application. As Figure 2 indicated, taking the first vibration wave as a sine wave and the second vibration wave as a cosine wave as an example, an implementation process of dissipating the radar module by the second vibration wave is given:

[0101] During the operation of the air conditioner indoor unit, the vibration waveform generated thereby is similar to a harmonic wave, but the amplitude of each cycle is not exactly the same, and there is a slight difference. Accordingly, by collecting vibration signals of multiple vibration cycles, the first vibration wave (sin(·)) can be fitted. Since the second vibration wave has a phase difference of half a cycle from the first vibration wave, its waveform is completely opposite to the first vibration wave, i.e. (cos(·)). At any time point, the sum of the vibration amplitude value cos(x) corresponding to the second vibration wave and the vibration amplitude value sin(x) corresponding to the first vibration wave is 0, so the vibration generated by the air conditioner indoor unit can be offset.

[0102] Specifically, in step 102, the radar-based air conditioning fresh air control device receives the position information of each individual in the indoor space collected by the damped radar module in real time, and analyzes the displacement trajectory corresponding to the individual position information collected in a preset period, and integrates the rate of change of the speed corresponding to the displacement of the individual in the period with time into the acceleration change curve of the corresponding individual.

[0103] The acceleration change curve is used to represent the speed change of the individual in the period, and is used as a basis for quantifying the motion degree of the individual.

[0104] In the case where the acceleration corresponding to each time point in the acceleration change curve of each individual is not 0, the motion degree of each individual is determined based on the change trend of the acceleration change curve in the time domain.

[0105] Specifically, the radar-based air conditioning fresh air control device analyzes the acceleration change trend presented by the acceleration change curve of each individual:

[0106] If the acceleration corresponding to each time point in the acceleration change curve is not 0, that is, the individual is in a variable speed motion in the period, the change trend of the acceleration in the acceleration change curve needs to be analyzed, and the maximum acceleration value in the time interval with the longest span of the horizontal axis when the acceleration changes in the time domain can be represented as the motion degree of the corresponding individual.

[0107] In addition, the change frequency with the most obvious span in the vertical axis when the acceleration changes in the frequency domain can also be represented as the motion degree of the corresponding individual.

[0108] If the acceleration corresponding to each time point in the acceleration change curve is 0, that is, the individual is in a uniform speed motion or a stationary state in the period, the activity state of the individual needs to be further judged in combination with the instantaneous speed of the individual in the period.

[0109] Based on the motion degree of all individuals, a target fresh air rotating speed value is determined for adjusting the rotating speed of the fan of the fresh air system of the air conditioner to the target fresh air rotating speed value.

[0110] It should be noted that before adjusting the fresh air speed, a mapping relationship between the motion degree and the rotating speed value of the fresh air fan needs to be preset, which is not limited by the embodiments of the present application.

[0111] The greater the motion degree of the individual, the more intense the motion, and the greater the consumption of oxygen in the room, so the rotating speed value of the fresh air fan matched therewith is correspondingly greater.

[0112] Specifically, when the radar-based air conditioning fresh air control device perceives that there is only one individual in the space, the movement degree of the individual can be directly compared with the pre-set mapping relationship between the movement degree and the rotation speed value of the fresh air fan, and the obtained rotation speed value of the fresh air fan matching the movement degree of the individual is taken as the target fresh air rotation speed value.

[0113] Alternatively, when it is perceived that there are multiple individuals in the space, statistical analysis can be performed on the movement degrees of all individuals, for example, the mean, mode, median, etc. of the movement degrees of the multiple individuals are taken, and the obtained rotation speed value of the fresh air fan matching the statistically obtained movement degree is compared with the pre-set mapping relationship between the movement degree and the rotation speed value of the fresh air fan, and the obtained rotation speed value of the fresh air fan matching the statistically obtained movement degree is taken as the target fresh air rotation speed value.

[0114] Subsequently, the radar-based air conditioning fresh air control device encapsulates the target fresh air rotation speed value into a fresh air control instruction and delivers it to the related components of the fresh air system. The fresh air system adjusts the actual fresh air rotation speed value of the fan of the fresh air fan in the default operation mode to the target fresh air rotation speed value under the control of the instruction, and the rotation speed adjustment of the fresh air fan causes the fresh air supplement amount to change accordingly.

[0115] After the fresh air system is turned on, the updated acceleration change curve fitted when the individual changes position is obtained by the damped radar module, and when the acceleration change curve indicates that the individual is accelerating, the movement degree of the individual is represented by the change trend of the acceleration in the time domain, so as to adjust the rotation speed of the fan of the fresh air system to a target value matching the movement degree of the individual. The movement degree is analyzed according to the acceleration change occurring in the period, and the rotation speed of the fan of the fresh air system is adaptively adjusted, so that the individual does not need to manually set the fresh air operation mode when moving, and the self-adaptive fresh air control can be performed according to the movement state on the principle of matching the fresh air supplement amount with the movement amount of the individual, thereby improving the control accuracy and efficiency of the fresh air system, and taking into account the fresh air experience and movement experience of the user.

[0116] On the basis of any of the above embodiments, when the acceleration corresponding to each time point in the acceleration change curve of each individual is not 0, the movement degree of each individual is determined based on the change trend of the acceleration change curve in the time domain, including: when the acceleration corresponding to each time point in the acceleration change curve of each individual is not 0, the cumulative time length of each acceleration interval in the time domain is taken as the time domain span value corresponding to each acceleration interval.

[0117] Wherein, the acceleration interval is a plurality of subintervals divided according to the absolute value of the acceleration, and each subinterval is pre-set with a fresh air gear; the fresh air gear is positively correlated with the lower limit value of the acceleration interval.

[0118] It should be noted that the abscissa of the acceleration change curve is set as time (unit: seconds, value range: [0, +∞)), and the ordinate is set as acceleration (unit: meters per square second, value range: [-∞, +∞)) to show the change trend.

[0119] Further, the acceleration of the ordinate needs to be divided into at least two continuous value intervals to represent different motion degrees through different change rates of speed.

[0120] Exemplarily, four new air positions, i.e., a low-speed new air position, a medium-speed new air position, a high-speed new air position, and a powerful new air position, can be set in advance in the new air system according to different new air fan speeds, and the absolute value of the acceleration in the ordinate is divided into four acceleration intervals, i.e., [0, A), [A, B), [B, C), and [C, +∞).

[0121] Among them, with the increasing fan speed of the four new air positions, the lower limit values 0, A, B, and C of the four acceleration intervals can be increased in turn according to the corresponding equal ratio or equal difference rule. For example, A can take a value of 0.5 m / s 2 , B can take a value of 1.5 m / s 2 , and C can take a value of 2.5 m / s 2 .

[0122] Specifically, the radar-based air conditioner new air control device determines the time duration of each acceleration interval in turn by the acceleration change curve that the acceleration presents a changing trend, and outputs the accumulated time length of each acceleration interval as the corresponding time span value.

[0123] Based on the acceleration interval corresponding to the maximum time span value, the motion degree of the individual is determined.

[0124] Specifically, the radar-based air conditioner new air control device can directly output the acceleration interval corresponding to the maximum time span value as the motion degree of the individual after screening the maximum time span value from the time span values of all acceleration intervals on the abscissa, so as to map the new air position that needs to be adjusted through the corresponding relationship between the acceleration interval and the new air position in the subsequent step.

[0125] Alternatively, a large amount of sample data can be used to train an artificial intelligence model to quantify the motion degree of the individual by applying the model to the acceleration interval corresponding to the maximum time span value and the motion trajectory within the period, and the value of the motion degree can be any percentage between 0 and 1, so as to map the new air fan speed value that needs to be adjusted through the linear relationship between the motion degree and the new air fan speed value in the subsequent step.

[0126] In the embodiment of the present application, when determining that the acceleration change curve indicates that the individual is moving at a variable speed, the time domain span distribution of each acceleration interval in the period is determined for the acceleration change curve, and the acceleration interval corresponding to the maximum time domain span value is used to quantify the motion degree of the individual, so as to adjust the fan speed of the fresh air system to a target value matching the motion degree of the individual. When the time domain analysis is performed on the trend of the acceleration change over time, the time precision and accuracy are higher, and the change amount of the motion degree is easier to capture, thereby improving the control precision of the fresh air system.

[0127] On the basis of any of the above embodiments, after the acceleration change curve is determined, if it is determined that the acceleration corresponding to each time point in the acceleration change curve of at least one individual is 0, and the instantaneous speed of the individual is continuously 0, the fan speed of the fresh air system is adjusted to a rated minimum value.

[0128] If the acceleration corresponding to each time point in the acceleration change curve of all individuals is 0, and the instantaneous speed of each individual is not 0, a target fresh air speed value is determined based on the speed corresponding to the uniform motion of all individuals in a preset period, so as to adjust the fan speed of the fresh air system to the target fresh air speed value.

[0129] Specifically, when the radar-based air conditioner fresh air control device analyzes the acceleration change trend of the acceleration change curve of each individual and determines that the individual is not moving at a variable speed, further judgment needs to be made in combination with the instantaneous speed of the individual.

[0130] If the acceleration corresponding to each time point in the acceleration change curve of at least one individual is 0, and the instantaneous speed of the individual in the period is continuously 0, that is, the individual is in a stationary state in the period, it is determined that the individual has a sleep tendency, or the individual belongs to a vulnerable group such as an infant, an elderly person, etc., and the demand for fresh air supplement is small when the individual does not move. Therefore, in the principle of caring for the vulnerable group, the fan speed of the fresh air system can be directly adjusted to a rated minimum value.

[0131] If the acceleration corresponding to each time point in the acceleration change curve of all individuals is 0, and the instantaneous speed of the individual in the period is not 0, that is, all individuals in the indoor space are moving at a uniform speed corresponding to the instantaneous speed, and are in different degrees of motion state, it is determined that the activity amount of the indoor individual is relatively fixed, and the demand for fresh air supplement is determined by the speed of the uniform motion of the individual. When all individuals in the indoor space move at the same speed, the corresponding fresh air speed value of the speed can be mapped according to the corresponding relationship between the speed and the fan speed of the fresh air system, and is used as a target value to guide the adjustment of the fan speed of the fresh air system.

[0132] It can be understood that when each individual in the room moves at a respective speed at different degrees of uniform motion, the speeds of the uniform motion of all individuals can be statistically analyzed first, and the new air fan speed value corresponding to the statistical mean, median or mode speed is mapped through the corresponding relationship between the new air fan speed and the fan speed, which is used as a target value to guide the new air system to adjust the fan speed.

[0133] When the acceleration change curve indicates that the individual is not variable speed motion, the embodiment of the application determines that the individual is in a stationary state or a uniform motion state by combining the instantaneous speed of each individual, and adjusts the fan speed of the new air system according to the intention of the individual in different states, which can improve the control accuracy and efficiency of the new air system on the basis of taking into account the individual differences and group needs, and taking into account the new air experience and motion experience of the user.

[0134] On the basis of any of the above embodiments, the posture feature data includes body feature data or face feature data.

[0135] The target condition is determined according to the body feature data of the individual frequently nodding or continuously covering the mouth within a preset time length, or the face feature data of the individual yawning or frequently blinking within a preset time length.

[0136] Specifically, the posture feature data analyzed in the radar-based new air control device of the air conditioner can be body feature data or face feature data, wherein:

[0137] The body feature data usually determines the state and motion condition of the limbs by relying on the landmark positions such as the joints in the head and torso. The target condition corresponding thereto can be the head motion feature of the individual frequently nodding within a preset time length, to represent that the user individual is drowsy when the oxygen content in the room is low. Or the hand motion data when continuously covering the mouth, to represent that the user resists the invasion of the gas by covering the mouth and nose when there is an odor or irritating harmful gas in the room.

[0138] The face feature data usually determines the expression and motion condition of the face by relying on the landmark positions such as the nostrils, eye corners, lips and dimples. The target condition corresponding thereto can be the mouth motion feature of the individual yawning a lot within a preset time length, or the eye motion data when frequently blinking, both of which can represent that the user individual is drowsy when the oxygen content in the room is low.

[0139] The embodiment of the present application can identify body feature data or facial feature data through the sensing information of the radar module after vibration elimination when there is a certain degree of pollution in the room, and decide to start the fresh air system when the data conforms to the natural physiological response action of the human body in the polluted environment. The behavior intention corresponding to the user's body language or facial expression can be referred to, certain reliability and intelligence are brought to the control accuracy of the fresh air system, and the equipment energy efficiency and user experience are considered.

[0140] On the basis of any of the above embodiments, the posture feature data includes body feature data and facial feature data.

[0141] The target condition is determined according to the body feature data and the facial feature data of the individual when yawning and continuously covering the mouth for a preset length of time.

[0142] Specifically, the posture feature data analyzed in the air conditioner fresh air control device based on the radar can be body feature data and facial feature data, and then the hand movement data in the body feature data and the mouth movement feature and eye movement data in the facial feature data are used to represent the actions of covering the mouth with hands, yawning, closing eyes, blinking, stretching, etc. exhibited by the user when the indoor oxygen content is low.

[0143] The embodiment of the present application can identify body feature data and facial feature data through the sensing information of the radar module after vibration elimination when there is a certain degree of pollution in the room, and decide to start the fresh air system when the data conforms to the natural physiological response action of the human body in the polluted environment. The behavior intention corresponding to the user's body language or facial expression can be referred to, certain reliability and intelligence are brought to the control accuracy of the fresh air system, and the equipment energy efficiency and user experience are considered.

[0144] On the basis of any of the above embodiments, the vibration sampling signal collected by the vibration sensor of the air conditioner indoor unit determines the first vibration wave, including: obtaining the average sampling period according to the plurality of vibration periods contained in the vibration sampling signal, and obtaining the average sampling amplitude according to the vibration amplitude corresponding to the target sampling point in each vibration period.

[0145] The target sampling point is a wave peak sampling point and / or a wave trough sampling point in the sampling period.

[0146] Specifically, in step 101, the air conditioner fresh air control device based on the radar performs mean value processing on the vibration sampling signal that periodically and floatingly changes on the specific target sampling point in the sampling period, to obtain the average sampling period and the average sampling amplitude that can represent the overall vibration level, and the calculation formula is as follows:

[0147]

[0148]

[0149] wherein, T is an average sampling period, A is an average sampling amplitude, n is a number of vibration periods contained in the sampling period, T i is the i-th vibration period in the sampling period. For any vibration period, if the target sampling point is a peak sampling point and a trough sampling point in the vibration period, then in the i-th vibration period, A j may be a peak amplitude value corresponding to the peak sampling point in the vibration period, and at this time, j = 2i-1. A j may be a trough amplitude value corresponding to the trough sampling point in the vibration period, and at this time, j = 2i.

[0150] generate the first vibration wave based on the average sampling period and the average sampling amplitude.

[0151] Specifically, the radar-based air conditioner fresh air control device takes the average sampling period T and the average sampling amplitude A as new periods and amplitudes, respectively, to reconstruct the first vibration wave after maintaining the vibration of the indoor unit.

[0152] The embodiments of the present application reconstruct the first vibration wave for representing the stable vibration level by using the average sampling period and the average sampling amplitude obtained by the mean value processing of the multiple vibration periods contained in the vibration sampling signal and the vibration amplitudes at the target sampling points in each vibration period. The vibration wave emitted by the air conditioner during its operation can be maintained, thereby providing reasonable reference value for subsequent superimposed shock absorption and greatly improving the radar sensing accuracy of the air conditioner.

[0153] On the basis of any of the above embodiments, if the target sampling point is other than the peak sampling point and the trough sampling point in the vibration period, the value of the target sampling point in the time domain includes and

[0154] wherein, k is a positive integer greater than 2.

[0155] Specifically, if the target sampling point is any sampling point other than the peak sampling point and the trough sampling point in the vibration period that is, in any vibration period, the absolute values of the amplitudes of the sampling points and and are the same.

[0156]

[0157] wherein, is the average sampling amplitude at the sampling point , and respectively, the absolute value of the amplitude of the sampling point is the same as the amplitude of the sampling point. respectively, the absolute value of the amplitude of the sampling point is the same as the amplitude of the sampling point.

[0158] Then, the radar-based air conditioner fresh air control device is based on the average sampling amplitude A obtained by peak-to-valley mean value, and also uses other sampling points The average sampling amplitude obtained by mean value The first vibration wave is reconstructed.

[0159] Exemplarily, Figure 3 is a flowchart of a radar-based air conditioner fresh air control method provided by the present application. As Figure 3 shown, the present application embodiment gives a specific implementation of a radar-based air conditioner fresh air control method:

[0160] (1) After activating the air conditioner, the vibration sensor is used to sample the vibration generated by the indoor unit to obtain the first vibration wave.

[0161] (2) The vibration generator outputs the second vibration wave to dissipate the vibration propagated to the radar module, and continues to collect human body signals in the room using the dissipating radar. If no one exists, the fresh air system is closed. If someone exists, further judgment is made in combination with the CO2 concentration data.

[0162] (4) If the CO2 concentration data is between the target interval, the human face expression is captured by the dissipating radar module.

[0163] (5) If the human face expression meets the target condition, for example, the person's mouth is open, and the hand covers the mouth for more than 1.5 seconds, or the person's mouth is open for more than 2 seconds, any one condition is considered to be caused by high indoor CO2 concentration, which makes people drowsy and yawn, and the fresh air system is started.

[0164] (5) Continue to capture the real-time displacement trajectory of the individual by the dissipating radar module, and extract the acceleration change curve of the internal acceleration a of each preset period with time, wherein:

[0165]

[0166] Wherein, the independent variable of the displacement change curve is time t, and the dependent variable S(t) describes the value of displacement at different times. v0 is the instantaneous speed when t is 0, that is, the instantaneous speed corresponding to the initial moment of the period. a is the acceleration.

[0167] The first order derivative of displacement to time is obtained by the displacement change curve, which is the rate of change of displacement to time, and the physical meaning is speed, and the second order derivative to time is obtained, which is the rate of change of displacement to time rate, that is, the rate of change of speed to time, and the physical meaning is acceleration, and the expression is as follows:

[0168] S″(t)=(S′(t))′=(v(t))′

[0169] =(v0+at)′=a(t)

[0170] Wherein, the independent variable of the acceleration change curve is time t, and the dependent variable a(t) describes the value of acceleration a at different times.

[0171] (6) The value of acceleration is divided into four acceleration intervals in advance:

[0172] 1 area, a belongs to (-A, +A);

[0173] 2 area, a belongs to (-B, -A] union [+A, +B);

[0174] 3 area, a belongs to (-C, -B] union [+B, +C);

[0175] 4 area, a belongs to (-∞, -C] union [+C, +∞);

[0176] (7) According to the acceleration change curve, the time domain spanned by acceleration in different acceleration intervals within 10 minutes is counted, that is, T1 is the time domain span corresponding to the 1 area, and so on, T2, T3 and T4 are the time domain span corresponding to 2, 3 and 4 areas respectively, and T1, T2, T3 and T4 are sorted, and the maximum time domain span T is selected.

[0177] (8) If T is the time domain span value T1 corresponding to the 1 area, the fresh air is opened in one gear;

[0178] If T is the time domain span value T2 corresponding to the 2 area, the fresh air is opened in two gears;

[0179] If T is the time domain span value T3 corresponding to the 3 area, the fresh air is opened in three gears;

[0180] If T is the time domain span value T4 corresponding to the 4 area, the fresh air is opened in four gears.

[0181] The embodiment of the application further reconstructs the first vibration wave by using the average sampling amplitude obtained by other sampling point mean value on the basis of the average sampling amplitude obtained by peak-to-valley mean value. It can exclude the interference of extreme value in the process of maintaining the vibration wave emitted by the air conditioner itself, and improve the linear fitting precision.

[0182] Figure 4is a structural schematic view of a radar-based fresh air control device for an air conditioner provided by the present application. Based on any of the above embodiments, as shown in Figure 4 The radar-based fresh air control device for an air conditioner provided by the present application embodiment includes a radar stabilization module 410, a gas monitoring module 420, and a fresh air control module 430, wherein:

[0183] The radar stabilization module 410 is configured to determine a first vibration wave based on a vibration sampling signal collected by a vibration sensor from the vibration of the air conditioner indoor unit.

[0184] The gas monitoring module 420 is configured to, during the process of controlling the vibration generator to output a second vibration wave, acquire posture feature data of all individuals through a radar module if it is determined that the current air quality data is in a target concentration interval.

[0185] The fresh air control module 430 is configured to, in the case where the posture feature data of at least one individual meets a target condition, start the fresh air system of the fresh air conditioner.

[0186] The lower limit value of the target concentration interval is determined according to the standard concentration of indoor harmful gases and / or particulate matter; the target condition is determined according to the posture features corresponding to the actions exhibited by the individual when in an environment with air quality below the standard; the first vibration wave and the second vibration wave have the same period and amplitude, and the phase of the first vibration wave and the phase of the second vibration wave differ by half a period; the vibration sampling signal is a vibration signal generated by the air conditioner indoor unit due to the operation of the fan within a sampling period; the vibration sensor, the radar module, and the vibration generator are all arranged in the air conditioner indoor unit, the vibration sensor is configured to sense the vibration of the air conditioner indoor unit, and the vibration generator is configured to dampen the vibration of the radar module caused by the air conditioner indoor unit.

[0187] Specifically, the radar stabilization module 410, the gas monitoring module 420, and the fresh air control module 430 are sequentially electrically connected.

[0188] After receiving and responding to the activation instruction, the radar stabilization module 410 controls the fan of the air conditioner indoor unit to operate at the speed in the mode, and controls the compressor of the air conditioner outdoor unit to operate at the power in the mode.

[0189] Since the operation of the fan will cause the vibration generated by itself to propagate to the air conditioner indoor unit and its internal components, the radar stabilization module 410 periodically senses the vibration of the air conditioner indoor unit through the vibration sensor, and according to the vibration sampling signal collected within a sampling period, fits a first vibration wave for representing the vibration degree of the air conditioner.

[0190] The gas monitoring module 420 retains the period and amplitude of the first vibration wave obtained by the radar stabilizing module 410, delays the phase by half a period, and obtains a second vibration wave opposite to the waveform of the first vibration wave. After that, the vibration generator is controlled to emit a vibration wave with the second vibration wave to continuously damp the radar module.

[0191] In the process of continuously damping the radar module by the vibration generator, the radar-based new air control device of the air conditioner compares the current air quality data with the corresponding target concentration interval:

[0192] If the current air quality data is in the target concentration interval, it means that the current air in the room is polluted, but not to the extent of severe pollution. Therefore, the radar module after damping is needed to drive to collect the position information of the key parts of the human body of each individual in the space where the air conditioner is located in real time, and to perform coordinate system conversion and standardization operation on the relative position between the body parts of each individual according to the joint sequence, to obtain the posture exhibited by the human body, and output it as posture feature data.

[0193] The new air control module 430 compares the posture feature data of each individual with the target condition corresponding to various harmful substances:

[0194] If the human body key part connection relationship carried in the posture feature data of at least one individual meets the threshold set for the relevant connection relationship in the specific action corresponding to the target condition, it means that at least one individual perceives the pollution of the indoor air by the harmful substance corresponding to the target condition before other individuals. Therefore, when the air quality sensing module detects that the indoor air quality is poor, and it is determined that the posture exhibited by the radar module monitored by the human individual conforms to the physiological response exhibited in the gas pollution environment, the fresh air conditioner is controlled to start the fresh air system to improve the air quality by supplementing fresh air.

[0195] If the human body key part connection relationship carried in the posture feature data of all individuals does not meet the threshold set for the relevant connection relationship in the specific action corresponding to the target condition, the fresh air is needed to be started when the air quality sensing module detects that the indoor air quality is poor, but it is determined that the radar module does not monitor the expected physiological response exhibited by the human individual. Further judgment is also needed according to the specific situation of the individual to act as a theoretical basis for subsequent processing measures.

[0196] Optionally, the device further comprises an acceleration analysis module, a motion degree analysis module, and a first fresh air adjustment module, wherein:

[0197] The acceleration analysis module is configured to determine an acceleration change curve based on the individual position information collected by the radar module after damping using the second vibration wave within a preset period.

[0198] The motion degree analysis module is configured to determine the motion degree of each individual based on a variation trend of the acceleration variation curve in the time domain, in a case where the acceleration corresponding to each time point in the acceleration variation curve of each individual is not 0.

[0199] The first fresh air adjusting module is configured to determine a target fresh air rotating speed value based on the motion degrees of all individuals, so as to adjust the rotating speed of the fan of the fresh air system to the target fresh air rotating speed value by the air conditioner.

[0200] The radar module after the vibration wave is eliminated by the second vibration wave, which has a phase difference of half a cycle from the first vibration wave, cancels the vibration of the radar module caused by the first vibration wave due to the propagation of the indoor unit of the air conditioner.

[0201] Optionally, the motion degree analysis module comprises a time domain analysis unit and a motion degree analysis unit, wherein:

[0202] The time domain analysis unit is configured to, in a case where the acceleration corresponding to each time point in the acceleration variation curve of each individual is not 0, take the cumulative time length of each acceleration interval in the acceleration variation curve in the time domain as a time domain span value corresponding to each acceleration interval.

[0203] The motion degree analysis unit is configured to determine the motion degree of the individual based on the acceleration interval corresponding to the maximum time domain span value.

[0204] Optionally, the acceleration interval is a plurality of subintervals divided according to the absolute value of acceleration, and each subinterval is respectively provided with a fresh air gear; the fresh air gear is positively correlated with the lower limit value of the acceleration interval.

[0205] Optionally, the device further comprises a second fresh air adjusting module and a third fresh air adjusting module, wherein:

[0206] The second fresh air adjusting module is configured to, if it is determined that the acceleration corresponding to each time point in the acceleration variation curve of at least one individual is 0, and the speed of the individual is continuously 0, adjust the rotating speed of the fan of the fresh air system to a rated minimum value.

[0207] The third fresh air adjusting module is configured to, if the acceleration corresponding to each time point in the acceleration variation curve of all individuals is 0, and the instantaneous speed of each individual is not 0, determine a target fresh air rotating speed value based on the speed corresponding to the uniform motion of all individuals in a preset period, so as to adjust the rotating speed of the fan of the fresh air system to the target fresh air rotating speed value by the air conditioner.

[0208] Optionally, the posture feature data comprises body feature data or face feature data.

[0209] The target condition is determined according to body feature data of the individual frequently nodding and continuously covering the mouth within a preset time length, or face feature data of the individual yawning and frequently blinking within the preset time length.

[0210] Optionally, the posture feature data includes body feature data and face feature data.

[0211] The target condition is determined according to body feature data and face feature data of the individual continuously covering the mouth and yawning within a preset time length.

[0212] Optionally, the radar stabilizing module 410 includes a stabilizing calculation unit and a linear fitting unit, wherein:

[0213] The stabilizing calculation unit is configured to obtain an average sampling period according to a plurality of vibration periods contained in the vibration sampling signal, and obtain an average sampling amplitude according to a vibration amplitude corresponding to a target sampling point in each vibration period.

[0214] The linear fitting unit is configured to generate the first vibration wave based on the average sampling period and the average sampling amplitude.

[0215] The target sampling point includes a peak sampling point and a trough sampling point in the sampling period.

[0216] Optionally, if the target sampling point is other sampling points in the vibration period except the peak sampling point and the trough sampling point, the value of the target sampling point in the time domain includes and

[0217] Wherein, k is a positive integer greater than 2.

[0218] The radar-based air conditioner fresh air control device provided by the embodiments of the present application is used to execute the radar-based air conditioner fresh air control method provided by the present application, and its implementation manner is consistent with that of the radar-based air conditioner fresh air control method provided by the present application, and the same beneficial effects can be achieved, which will not be described here.

[0219] The embodiment of the present application sends a second vibration wave opposite to the actual first vibration wave through a vibration generator to dissipate the vibration transmitted by the air conditioner indoor unit, and when it is determined that the current air quality data points to a certain degree of pollution existing in the room, and the individual posture monitored by the radar module under the vibration dissipation state conforms to the natural physiological response action of the human body in the polluted environment, the new air system is decided to be started. The vibration wave emitted by the vibration transmitter and the vibration wave generated by the air conditioner itself during operation can be superimposed to dissipate the shock, so that the air conditioner radar observation can be stable imaging, and the opening of the new air system is intercepted and judged on the basis of the threshold comparison according to the air quality, and the individual posture monitored by the vibration dissipation radar, which can refer to the behavior intention corresponding to the user posture, brings a certain reliability and intelligence to the control accuracy of the new air system, and takes into account the equipment energy efficiency and user experience.

[0220] Figure 5 is a structural schematic diagram of the fresh air conditioner provided by the present application. On the basis of any of the above embodiments, as shown in Figure 5 The fresh air conditioner provided by the embodiment of the present application includes an air conditioner indoor unit 510, an air conditioner outdoor unit 520 and a fresh air system 530.

[0221] The air conditioner indoor unit 510 includes an air conditioner controller 511 and a vibration dissipation device 512 in communication connection, and further includes a storage and a program or instruction stored on the storage and executable on the air conditioner controller 511, and the program or instruction is executed by the air conditioner controller 511 to execute the radar-based air conditioner fresh air control method as described in any of the above.

[0222] The vibration dissipation device 512 includes a radar module 512-1, a vibration generator 512-2 and a vibration sensor 512-3 in communication connection with the air conditioner controller 511 respectively.

[0223] The vibration sensor 513 is used to sense the vibration condition of the air conditioner indoor unit 510. The vibration generator 512-2 is used to dissipate the vibration of the radar module 512-1 driven by the air conditioner indoor unit 510.

[0224] The radar module 512-1 is a millimeter wave radar.

[0225] Specifically, the fresh air conditioner is provided with an indoor unit 510, an outdoor unit 520 and a fresh air system 530, the air conditioner indoor unit 510 and the air conditioner outdoor unit 520 are communicated through a refrigerant pipeline, and the fresh air system 530 independently enjoys the air duct of circulating fresh air.

[0226] Wherein, the air conditioner controller 511 and the vibration damping device 512 are arranged in the air conditioner indoor unit 510, the air conditioner controller 511 is integrated in the control chip of the air conditioning system, so as to control the vibration damping device 512 to offset the vibration caused by the operation of the air conditioner indoor unit 510, and then the human body perception is carried out on the indoor space, and the process is as follows:

[0227] The vibration damping device 512 is composed of a radar module 512-1, a vibration generator 512-2 and a vibration sensor 512-3 which are arranged independently. When the air conditioner indoor unit 510 is activated, the vibration caused by the fan will spread to the air conditioner indoor unit 510 and its internal devices. Therefore, the air conditioner controller 511 periodically perceives the vibration of the air conditioner indoor unit 510 through the vibration sensor 512-3, and according to the vibration sampling signal collected in a sampling period, a first vibration wave is fitted to represent the vibration degree of the air conditioner.

[0228] The air conditioner controller 511 retains the period and amplitude of the first vibration wave, and delays the phase by half a period to obtain a second vibration wave opposite to the waveform of the first vibration wave, and then controls the vibration generator 512-2 to emit vibration wave to continuously damp the radar module 512-1.

[0229] In the process of continuously damping the radar module 512-1 by the vibration generator 512-2, the air conditioner controller 511 compares the current air quality data with the corresponding target concentration interval:

[0230] If the current air quality data is in the target concentration interval, it means that the current air in the room is polluted, but not to the extent of severe pollution. Therefore, the radar module after damping needs to drive the position information of the key parts of the human body collected in real time by each individual in the space of the air conditioner, and according to the relative position between the human body parts of each individual, the coordinate system conversion and standardization operation are carried out, the posture of the human body is obtained according to the joint sequence, and the posture feature data is output as the posture feature data.

[0231] If the current air quality data is less than the lower limit value of the target concentration interval, it means that the current air in the room is not polluted, and the fresh air system does not need to be started.

[0232] If the current air quality data is greater than the upper limit value of the target concentration interval, it means that the current pollution in the room is serious, and the fresh air system does not need to be started directly combined with the recognition of human body posture.

[0233] Then, the air conditioner controller 511 compares the posture feature data collected by the radar module after damping with each individual with the target conditions corresponding to various harmful substances:

[0234] If the human body key part connection relationship carried in the posture feature data of at least one individual meets the threshold set for the relevant connection relationship in the specific action corresponding to the target condition, it indicates that at least one individual perceives the pollution of the indoor air by the harmful substance corresponding to the target condition earlier than other individuals, and the fresh air system of the fresh air conditioner needs to be started only when the air quality sensing module detects that the indoor air quality is poor, and it is determined that the posture exhibited by the radar module monitored human individuals conforms to the physiological reaction presented when in the gas pollution environment.

[0235] If the human body key part connection relationship carried in the posture feature data of all individuals does not meet the threshold set for the relevant connection relationship in the specific action corresponding to the target condition, the fresh air needs to be started when the air quality sensing module detects that the indoor air quality is poor, but it is determined that the radar module does not monitor the expected physiological response exhibited by human individuals, and further judgment needs to be made according to the specific situation of the individual to provide a theoretical basis for subsequent processing measures.

[0236] On the contrary, if the body posture feature information of any target individual does not match the pre-set joint control wake-up posture, or the duration of the individual maintaining the joint control wake-up posture does not reach the pre-set threshold, it indicates that the current behavior intention of the individual is only to make some specific actions in the indoor space, and there is no need to use the elderly auxiliary tool, so the joint control of the air conditioner and the elderly auxiliary tool is not triggered.

[0237] The embodiment of the present application can emit a second vibration wave opposite to the actual first vibration wave through a vibration generator to dissipate the vibration propagated by the indoor unit of the air conditioner, and when it is determined that the current air quality data indicates that there is a certain degree of pollution in the indoor space, and the posture of the individual monitored by the radar module in the vibration dissipation state conforms to the natural physiological response action of the human body in the polluted environment, the fresh air system is started. The vibration wave emitted by the vibration emitter and the vibration wave generated by the air conditioner itself can be superimposed to dissipate the vibration, so that the radar observation of the air conditioner can be stable imaging, and the opening of the fresh air system is intercepted and judged based on the threshold comparison of the air quality and the individual posture monitored by the vibration dissipation radar. The behavior intention corresponding to the user posture can be referred to, which brings a certain reliability and intelligence to the control accuracy of the fresh air system, and the device energy efficiency and user experience are taken into account.

[0238] Moreover, the logic instructions in the memory can be realized in the form of software function units and sold or used as independent products, and can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or the parts of the prior art that make contributions or parts of the technical solutions can be embodied in the form of software products. The computer software product is stored in a storage medium, and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in various embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various media that can store program codes.

[0239] In another aspect, the present application also provides a computer program product, which comprises a computer program, the computer program can be stored on a non-transitory computer readable storage medium, and the computer program can be executed by a processor to enable a computer to execute the radar-based fresh air control method of the air conditioner provided by the above-mentioned method. The method comprises: determining a first vibration wave based on a vibration sampling signal collected by a vibration sensor on an air conditioner indoor unit; in the process of controlling a vibration generator to output a second vibration wave, if it is determined that the current air quality data is in a target concentration interval, acquiring posture feature data of all individuals by a radar module; in the case that the posture feature data of at least one individual meets a target condition, starting a fresh air system of a fresh air conditioner; wherein the lower limit value of the target concentration interval is determined according to the standard concentration of indoor harmful gases and / or particulate bodies; the target condition is determined according to the posture features corresponding to the actions exhibited by the individual when in an environment with air quality lower than the standard; the period and amplitude of the first vibration wave and the second vibration wave are the same, and the phase of the first vibration wave and the phase of the second vibration wave differ by half a period; the vibration sampling signal is a vibration signal generated by the air conditioner indoor unit due to the operation of the fan within a sampling period; the vibration sensor, the radar module and the vibration generator are all arranged in the air conditioner indoor unit, the vibration sensor is used to sense the vibration condition of the air conditioner indoor unit, and the vibration generator is used to damp the radar module that is vibrated by the air conditioner indoor unit.

[0240] In yet another aspect, the present application also provides a non-transitory computer-readable storage medium having stored thereon a computer program, which, when executed by a processor, implements the radar-based fresh air control method of an air conditioner provided by the above method, and the method comprises: determining a first vibration wave based on a vibration sampling signal collected by a vibration sensor on an indoor unit of an air conditioner; in the process of controlling a vibration generator to output a second vibration wave, if it is determined that the current air quality data is in a target concentration interval, acquiring posture feature data of all individuals by a radar module; in the case where the posture feature data of at least one individual meets a target condition, starting a fresh air system of a fresh air conditioner; wherein the lower limit value of the target concentration interval is determined according to the standard concentration of indoor harmful gases and / or particulate bodies; the target condition is determined according to the posture features corresponding to the actions exhibited by the individual when in an environment with air quality lower than the standard; the first vibration wave and the second vibration wave have the same period and amplitude, and the phase of the first vibration wave and the phase of the second vibration wave differ by half a period; the vibration sampling signal is a vibration signal generated by the indoor unit of the air conditioner due to the operation of a fan in a sampling period; the vibration sensor, the radar module and the vibration generator are all arranged in the indoor unit of the air conditioner, the vibration sensor is used to sense the vibration condition of the indoor unit of the air conditioner, and the vibration generator is used to perform vibration elimination on the radar module which is vibrated by the indoor unit of the air conditioner.

[0241] The device embodiments described above are merely illustrative, wherein the units described as separate components can or can not be physically separated, and the components displayed as units can or can not be physical units, i.e., they can be located in one place, or distributed on multiple network units. Part or all of the modules can be selected according to actual needs to achieve the purpose of the present embodiment scheme. Those skilled in the art can understand and implement without creative labor.

[0242] From the above description of the embodiments, those skilled in the art can clearly understand that the embodiments can be realized by means of software plus necessary general hardware platforms, and of course can also be realized by hardware. Based on such understanding, the above technical solutions, essentially or in terms of the contribution to the prior art, can be embodied in the form of a software product, which can be stored in a computer readable storage medium, such as a ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute the methods described in various embodiments or some parts of the embodiments.

[0243] It should be pointed out finally that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit the same; and although the present application has been described in detail with reference to the foregoing embodiments, it should be appreciated by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features thereof can be replaced equivalently; 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 application.

Claims

1. A radar-based fresh air control method for an air conditioner, characterized by, The method comprises the following steps: Based on the vibration sampling signal collected by the vibration sensor of the air conditioner indoor unit, a first vibration wave is determined; During the process of controlling the vibration generator to output a second vibration wave, if it is determined that the current air quality data is in a target concentration interval, the posture feature data of all individuals is obtained by the radar module; If it is determined that the posture feature data of at least one individual meets a target condition, the fresh air system of the fresh air conditioner is started; Wherein, the lower limit value of the target concentration interval is determined according to the standard concentration of indoor harmful gas and / or particulate matter; The target condition is determined according to the posture feature corresponding to the action exhibited by the individual when the individual is in an environment with air quality lower than the standard; The period and amplitude of the first vibration wave and the second vibration wave are the same, and the phase of the first vibration wave and the phase of the second vibration wave differ by half a period; The vibration sampling signal is the vibration signal generated by the fan of the air conditioner indoor unit within the sampling period; The vibration sensor, the radar module and the vibration generator are all arranged in the air conditioner indoor unit, the vibration sensor is used to sense the vibration condition of the air conditioner indoor unit, and the vibration generator is used to eliminate the vibration of the radar module which is driven to vibrate by the air conditioner indoor unit; Based on the individual position information collected by the radar module after eliminating vibration by using the second vibration wave within a preset period, an acceleration change curve is determined; If it is determined that the acceleration corresponding to each time point in the acceleration change curve of each individual is not 0, the motion degree of each individual is determined based on the change trend of the acceleration change curve in the time domain, which specifically includes: If it is determined that the acceleration corresponding to each time point in the acceleration change curve of each individual is not 0, the cumulative time length of each acceleration interval in the acceleration change curve is counted in the time domain as the time domain span value corresponding to each acceleration interval; Based on the acceleration interval corresponding to the maximum time domain span value, the motion degree of the individual is determined; Wherein, the acceleration interval is a plurality of subintervals divided according to the absolute value of acceleration, and each subinterval is provided with a fresh air gear; 2. The radar-based control method of fresh air according to claim 1, characterized in that, After starting the fresh air system of the fresh air conditioner, the method further comprises the following steps: Based on the motion degree of all individuals, a target fresh air speed value is determined, so that the fan speed of the fresh air system of the air conditioner is adjusted to the target fresh air speed value; Wherein, the radar module after eliminating vibration by using the second vibration wave, is through the second vibration wave with a phase difference of half a period from the first vibration wave, to offset the vibration of the radar module in the air conditioner indoor unit with the first vibration wave.

3. The radar-based control method of claim 2, wherein, After determining the acceleration change curve, the method further comprises the following steps: If it is determined that the acceleration corresponding to each time point in the acceleration change curve of at least one individual is 0, and the individual speed is continuously 0, the fan speed of the fresh air system is adjusted to the rated minimum value. If the acceleration corresponding to each time point in the acceleration change curve of each individual is 0, and the instantaneous speed of each individual is not 0, the target fresh air rotating speed value is determined based on the speed corresponding to the uniform motion of all individuals within a preset period, so that the air conditioner adjusts the rotating speed of the fan of the fresh air system to the target fresh air rotating speed value. 4.The radar-based control method of air conditioning fresh air according to claim 1, characterized in that, The posture feature data includes body feature data or face feature data. The target condition is determined according to the body feature data of frequent nodding and continuous mouth covering of the individual within a preset time length, or the face feature data of yawning and frequent blinking of the individual within a preset time length. 5.The radar-based control method of air conditioning fresh air according to claim 1, characterized in that, The posture feature data includes body feature data and face feature data. The target condition is determined according to the body feature data and face feature data of continuous mouth covering and yawning of the individual within a preset time length.

6. The radar-based control method of the fresh air of the air conditioner according to any one of claims 1 to 5, characterized in that, The first vibration wave is determined based on the vibration sampling signal collected by the vibration sensor on the air conditioner indoor unit, and includes: An average sampling period is obtained according to a plurality of vibration periods included in the vibration sampling signal, and an average sampling amplitude is obtained according to the vibration amplitude corresponding to a target sampling point in each vibration period; The first vibration wave is generated based on the average sampling period and the average sampling amplitude; The target sampling point includes a wave peak sampling point and a wave trough sampling point in the sampling period.

7. The radar-based control method of fresh air according to claim 6, characterized in that, If the target sampling point is a sampling point other than a peak sampling point and a valley sampling point in the vibration period, the value of the target sampling point in the time domain includes , , and ; k is a positive integer greater than 2.

8. A radar-based air conditioning fresh air control device, characterized by, It includes: The radar stability module is used to determine the first vibration wave based on the vibration sampling signal collected by the vibration sensor on the air conditioner indoor unit; The gas monitoring module is used to obtain the posture feature data of all individuals through the radar module if it is determined that the current air quality data is in the target concentration interval during the process of controlling the vibration generator to output the second vibration wave; The fresh air control module is used to start the fresh air system of the fresh air conditioner if it is determined that the posture feature data of at least one individual meets the target condition. The lower limit value of the target concentration interval is determined according to the standard concentration of indoor harmful gases and / or particles; the target condition is determined according to the posture feature corresponding to the action exhibited by the individual when the air quality is lower than the standard; the period and amplitude of the first vibration wave and the second vibration wave are the same, and the phase of the first vibration wave and the phase of the second vibration wave differ by half a period; the vibration sampling signal is a vibration signal generated by the air conditioner indoor unit due to the operation of the fan within a sampling period; the vibration sensor, the radar module and the vibration generator are all arranged in the air conditioner indoor unit, the vibration sensor is used to sense the vibration of the air conditioner indoor unit, and the vibration generator is used to damp the radar module which is vibrated by the air conditioner indoor unit; The acceleration change curve is determined based on the individual position information collected by the radar module within a preset period after the radar module is damped by the second vibration wave; If the acceleration corresponding to each time point in the acceleration change curve of each individual is not 0, the motion degree of each individual is determined based on the change trend of the acceleration change curve in the time domain, specifically including: In the case that the acceleration corresponding to each time point in the acceleration change curve of each individual is not 0, the cumulative time length of each acceleration interval in the acceleration change curve is taken as the time domain span value corresponding to each acceleration interval respectively; Determine the motion degree of the individual based on the acceleration interval corresponding to the maximum time domain span value; Wherein, the acceleration interval is a plurality of subintervals divided according to the absolute value of acceleration, and any subinterval is respectively provided with a fresh air position; The fresh air position is positively correlated with the lower limit value of the acceleration interval.

9. A fresh air conditioner characterized by comprising: It comprises an air conditioner indoor unit, an air conditioner outdoor unit and a fresh air system; The air conditioner indoor unit comprises an air conditioner controller and a vibration damping device in communication connection, further comprising a memory and a program or instruction stored on the memory and executable on the air conditioner controller, the program or instruction is executed by the air conditioner controller to execute the radar-based air conditioner fresh air control method according to any one of claims 1 to 7; The vibration damping device comprises a radar module, a vibration generator and a vibration sensor in communication connection with the air conditioner controller respectively; The vibration sensor is used to sense the vibration condition of the air conditioner indoor unit; The vibration generator is used to damp the radar module which is vibrated by the air conditioner indoor unit; Wherein, the radar module is a millimeter wave radar.

10. A non-transitory computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by the processor to realize the radar-based air conditioner fresh air control method according to any one of claims 1 to 7.

11. A computer program product comprising a computer program, characterized in that, The computer program is executed by the processor to realize the radar-based air conditioner fresh air control method according to any one of claims 1 to 7.

Images