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

Abstract

This invention provides a radar-based method, device, and air conditioner for controlling fresh air in an air-conditioning system. The method includes: activating the fresh air system when a radar module determines that at least one individual is present indoors; determining an acceleration change curve based on the individual's position information collected by the radar module within a preset period; determining the degree of motion of each individual based on the time-domain trend of the acceleration change curve, provided that the acceleration at each time point in the acceleration change curve for each individual is not zero; and determining a target fresh air rotation speed value based on the motion levels of all individuals, so that the air conditioner can adjust the fan speed of the fresh air system to the target fresh air rotation speed value. The radar-based method, device, and air conditioner provided by this invention eliminate the need for manual setting of the fresh air operation mode when an individual is moving, ensuring that the amount of fresh air supplied matches the amount of movement of the individual.

Description

Technical Field

[0001] This invention relates to the field of air conditioner technology, and in particular to a radar-based method, device, and fresh air air conditioner for controlling fresh air in an air conditioner. Background Technology

[0002] Fresh air conditioners or other devices with fresh air functions can refresh indoor air and improve indoor air quality by introducing fresh outdoor air or expelling stale indoor air.

[0003] Existing fresh air conditioners or other devices with fresh air functions are mainly controlled by users themselves, making them highly subjective and often resulting in untimely responses. However, the greater the activity level of the human body in a closed environment, the more oxygen is required. If indoor ventilation is not timely, it can lead to symptoms such as chest tightness, shortness of breath, and hypoxia. Therefore, how to match the amount of human activity with the amount of fresh air supply is an important issue that the industry urgently needs to address. Summary of the Invention

[0004] This invention provides a radar-based method, device, and fresh air air conditioner for controlling fresh air in air conditioning, which solves the problem of low control efficiency and accuracy caused by the reliance on manual adjustment by the user to maintain the balance between human activity and fresh air supply in existing fresh air air conditioners.

[0005] This invention provides a radar-based method for controlling fresh air in an air conditioning system, comprising:

[0006] If the radar module determines that at least one individual is present indoors, the fresh air system is activated, and the acceleration change curve is determined based on the individual's location information collected by the radar module within a preset period.

[0007] Given that the acceleration at each time point in the acceleration change curve of each individual is not zero, the degree of motion of each individual is determined based on the change trend of the acceleration change curve in the time domain.

[0008] Based on the activity level of all individuals, a target fresh air speed value is determined so that the air conditioner can adjust the fan speed of the fresh air system to the target fresh air speed value.

[0009] According to a radar-based air conditioning fresh air control method provided by the present invention, the step of determining the degree of motion of each individual based on the time-domain variation trend of the acceleration variation curve, when it is determined that the acceleration at each time point in the acceleration variation curve of each individual is not zero, includes:

[0010] If it is determined that the acceleration at each time point in the acceleration change curve of each individual is not zero, the cumulative duration of each acceleration interval in the acceleration change curve in the time domain will be used as the time domain span value corresponding to each acceleration interval.

[0011] The degree of motion of an individual is determined based on the acceleration range corresponding to the maximum time span value;

[0012] The acceleration range is divided into multiple sub-ranges based on the absolute value of acceleration, and each sub-range has a preset fresh air setting; the fresh air setting is positively correlated with the lower limit of the acceleration range.

[0013] According to a radar-based air conditioning fresh air control method provided by the present invention, the step of determining the target fresh air rotation speed value based on the motion level of all individuals includes:

[0014] Statistical analysis is performed on the fresh air speed values ​​corresponding to the fresh air level that matches the degree of movement of each individual to determine the target fresh air speed value.

[0015] According to a radar-based fresh air control method for air conditioning provided by the present invention, the step of determining the acceleration change curve based on individual position information collected by the radar module within a preset period includes:

[0016] Based on the individual position information collected by the radar module within a preset period, the displacement change curve of the corresponding individual is determined.

[0017] The acceleration change curve is obtained by taking the second derivative of the displacement change curve.

[0018] According to a radar-based air conditioning fresh air control method provided by the present invention, after determining the acceleration change curve, the method further includes:

[0019] If it is determined that at least one individual has an acceleration of 0 at each time point in its acceleration change curve, and the individual's velocity remains at 0, then the fan speed of the fresh air system should be adjusted to the rated minimum value.

[0020] If the acceleration at each time point in the acceleration change curve of all individuals is 0, and the instantaneous velocity of each individual is not 0, the target fresh air speed value is determined based on the velocity corresponding to the uniform motion of all individuals within the preset period, so that the air conditioner can adjust the fan speed of the fresh air system to the target fresh air speed value.

[0021] The radar-based fresh air control method for air conditioning according to the present invention further includes:

[0022] If the radar module determines that there are no individuals present indoors, shut down the fresh air system.

[0023] The present invention also provides a radar-based air conditioning fresh air control device, comprising:

[0024] The acceleration analysis module is used to activate the fresh air system when the radar module determines that at least one individual is present indoors, and to determine the acceleration change curve based on the individual's position information collected by the radar module within a preset period.

[0025] The motion degree analysis module is used to determine the motion degree of each individual based on the time-domain variation trend of the acceleration change curve, provided that the acceleration at each time point in the acceleration change curve of each individual is not zero.

[0026] The first fresh air control module is used to determine the target fresh air speed value based on the activity level of all individuals, so that the air conditioner can adjust the fan speed of the fresh air system to the target fresh air speed value.

[0027] The present invention also provides a fresh air air conditioner, including an indoor unit, an outdoor unit and a fresh air system. The indoor unit is provided with a control processor and a radar module, and the radar module is disposed on the surface of the housing of the indoor unit. It also includes a memory and a program or instructions stored in the memory and executable on the control processor. When the program or instructions are executed by the control processor, they perform the radar-based fresh air control method as described above.

[0028] The radar module includes a millimeter-wave radar.

[0029] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the radar-based air conditioning fresh air control method as described above.

[0030] The present invention also provides a computer program product, including a computer program that, when executed by a processor, implements the radar-based air conditioning fresh air control method as described above.

[0031] This invention provides a radar-based air conditioning fresh air control method, device, and fresh air conditioner. When the presence of an individual is detected indoors via a radar module, the fresh air system is activated. Based on the position trajectory of the individual monitored by the radar module over a preset period, a corresponding acceleration change curve is fitted. When the acceleration change curve indicates variable speed movement of the individual, the decision is made to use the time-domain trend of acceleration in the acceleration change curve to characterize the degree of movement of the individual, thereby adjusting the fan speed of the fresh air system to a target value that matches the degree of movement. This achieves the analysis of the degree of movement based on the acceleration changes of the individual within a period and adaptively adjusts the fan speed of the fresh air system. This eliminates the need for manual setting of the fresh air operation mode when the individual is moving. It enables adaptive fresh air control based on the movement state while ensuring that the fresh air supply matches the individual's movement, improving the control accuracy and efficiency of the fresh air system and balancing the user's fresh air experience and exercise experience. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0033] Figure 1 This is one of the flowcharts of the radar-based air conditioning fresh air control method provided by the present invention;

[0034] Figure 2 This is a simulation diagram of the acceleration change curve provided by the present invention;

[0035] Figure 3 This is the second flowchart of the radar-based air conditioning fresh air control method provided by the present invention;

[0036] Figure 4 This is a schematic diagram of the radar-based air conditioning fresh air control device provided by the present invention;

[0037] Figure 5 This is a schematic diagram of the structure of the fresh air conditioner provided by the present invention. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0039] The terms "first," "second," etc., used in this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more.

[0040] It should be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used herein, unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “the” are intended to include the plural forms.

[0041] The terms “comprising” and “including” indicate the presence of the described feature, whole, step, operation, element and / or component, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or collections thereof.

[0042] Figure 1 This is one of the flowcharts illustrating the radar-based fresh air control method for air conditioning provided by this invention. For example... Figure 1 As shown, the radar-based air conditioning fresh air control method provided in this embodiment of the invention includes: step 101, when it is determined by the radar module that there is at least one individual in the room, activating the fresh air system, and determining the acceleration change curve based on the individual position information collected by the radar module within a preset period.

[0043] It should be noted that the execution subject of the radar-based air conditioning fresh air control method provided in this embodiment of the invention is a radar-based air conditioning fresh air control device.

[0044] The application scenario of the radar-based air conditioning fresh air control method provided in this embodiment of the invention is as follows: when a user activates the air conditioner, the displacement trajectory fed back in real time by the radar module is used to determine the individual's activity state, and the degree of movement in the corresponding activity state is analyzed. Based on this, the operation of the fresh air system is adjusted accordingly.

[0045] The radar module periodically monitors all individuals in the room at specified time intervals and sends the location information of each individual to the radar-based air conditioning fresh air control device. This embodiment of the invention does not specifically limit the working cycle of the radar module.

[0046] Optionally, the radar module can perform data acquisition operations at the default duty cycle.

[0047] Optionally, the user can issue a cycle change command, causing the radar module to receive and respond to the command, changing the working cycle to the cycle indicated by the command for data acquisition.

[0048] It should be noted that before step 101, the user needs to send an activation command through the transmission medium to activate the air conditioner's operating mode, so that the indoor unit of the air conditioner operates at the default fan speed of the mode, while the outdoor unit operates at the default frequency of the mode.

[0049] Optionally, the user can transmit activation commands via wireless communication between the control device and the fresh air conditioner or air conditioning system with fresh air function, so that the fresh air conditioner or air conditioning system with fresh air function initializes the working mode and starts the radar module.

[0050] Optionally, users can issue activation commands via voice interaction. The fresh air conditioner or air conditioning system with fresh air function receives the activation command, performs voice recognition, initializes the working mode, and starts the radar module.

[0051] Specifically, in step 101, after the fresh air conditioner starts its working mode, the radar-based fresh air control device senses the presence of a human being in the space where the fresh air conditioner is located through the radar module deployed in the indoor unit. At the same time, it turns on the fresh air system and receives the real-time position information collected by the radar module for each individual in the indoor space. It then analyzes the displacement trajectory corresponding to the position information of any individual collected within a preset period and integrates the rate of change of velocity over time corresponding to the displacement of the individual within that period into the acceleration change curve of the corresponding individual.

[0052] The acceleration change curve is used to represent how fast an individual's velocity changes within a period, thus serving as a basis for quantifying the degree of an individual's motion.

[0053] The embodiments of the present invention do not specifically limit the type and number of radar sensing devices in the radar module.

[0054] For example, a radar module may include a lidar, an infrared sensor, etc.

[0055] Optionally, millimeter-wave radar has a horizontal detection range of ±75°, a vertical detection range of ±40°, a detection range of up to 8 meters, a distance output accuracy of 0.1 meters, an angle output accuracy of 1°, and does not involve privacy issues, is not affected by light, and has a fast response speed.

[0056] Therefore, the radar-based air conditioning fresh air control device can analyze the user's position information in the spatial coordinate system based on the coordinates of the individual in the radar coordinate system collected in real time by the millimeter-wave radar.

[0057] For example, the radar module may include multiple sensing elements such as millimeter-wave radar, lidar, and infrared sensors. The radar-based air conditioning fresh air control device integrates the sensing information collected by each sensing element to comprehensively depict the real-time location of an individual.

[0058] For example, millimeter-wave radar can be used to collect the coordinates of an individual in the radar coordinate system. Based on a large amount of prior data, a mapping relationship between the radar coordinate system and the spatial coordinate system can be fitted to directly obtain the individual's location information in the actual geographic space.

[0059] Step 102: Given that the acceleration at each time point in the acceleration change curve of each individual is not zero, determine the degree of motion of each individual based on the trend of the acceleration change curve in the time domain.

[0060] Specifically, in step 102, the radar-based air conditioning fresh air control device analyzes the acceleration change trend presented by the acceleration change curve of each individual:

[0061] If the acceleration at each time point in the acceleration change curve is not zero, it means that the individual is undergoing variable motion within the period. Therefore, it is necessary to analyze the trend of acceleration change in the acceleration change curve. When the acceleration changes in the time domain, the maximum acceleration value in the longest time interval on the horizontal axis can be characterized as the degree of motion of the corresponding individual.

[0062] In addition, when acceleration changes in the frequency domain, the frequency of the most significant change across the vertical axis can be used to characterize the degree of motion of the corresponding individual.

[0063] If the acceleration at each time point in the acceleration change curve is 0, it means that the individual is in a state of uniform motion or stillness within the period. In this case, it is necessary to further judge the activity state by combining the individual's instantaneous velocity within the period.

[0064] Step 103: Based on the activity level of all individuals, determine the target fresh air speed value so that the air conditioner can adjust the fan speed of the fresh air system to the target fresh air speed value.

[0065] It should be noted that before step 103, it is necessary to pre-set the mapping relationship between the degree of motion and the rotation speed of the fresh air fan. This embodiment of the invention does not specifically limit this.

[0066] The greater the degree of individual exercise, the more intense the exercise, and the greater the consumption of indoor oxygen. Therefore, the speed of the fresh air fan should be correspondingly higher.

[0067] Specifically, in step 103, if the radar-based air conditioning fresh air control device senses that there is only one individual in the space, it can directly compare the individual's movement level with the pre-set mapping relationship between the movement level and the speed value of the fresh air fan, and take the obtained fresh air fan speed value that matches the individual's movement level as the target fresh air speed value.

[0068] Alternatively, if multiple individuals are detected in the space, the degree of movement of all individuals can be statistically analyzed. For example, the mean, mode, and median of the degree of movement of multiple individuals can be taken and compared with the pre-set mapping relationship between the degree of movement and the speed value of the fresh air fan. The speed value of the fresh air fan that matches the statistically obtained degree of movement can be used as the target fresh air speed value.

[0069] Next, the radar-based air conditioning fresh air control device encapsulates the target fresh air speed value into a fresh air control command and sends it to the relevant components of the fresh air system. This allows the fresh air system to adjust the actual fresh air speed of the fresh air fan in the default operating mode to the target fresh air speed value under the control of the corresponding command. The amount of fresh air supplied changes accordingly as the speed of the fresh air fan is adjusted.

[0070] This invention activates the fresh air system when a radar module detects the presence of an individual indoors. Based on the individual's positional trajectory monitored by the radar module over a preset period, a corresponding acceleration change curve is fitted. When the acceleration change curve indicates variable speed movement of the individual, the decision is made to characterize the degree of movement by utilizing the time-domain trend of acceleration in the acceleration change curve. This allows for the adjustment of the fresh air system's fan speed to a target value that matches the degree of movement. This achieves the analysis of the degree of movement based on the individual's acceleration changes within a period and adaptively adjusts the fresh air system's fan speed. This eliminates the need for manual setting of the fresh air operation mode during movement, enabling adaptive fresh air control based on the movement state while ensuring that the fresh air supply matches the individual's movement intensity. This improves the control accuracy and efficiency of the fresh air system, balancing the user's fresh air experience and exercise experience.

[0071] Figure 2 This is a simulation diagram of the acceleration variation curve provided by the present invention. Figure 2 As shown, based on any of the above embodiments, when it is determined that the acceleration corresponding to each time point in the acceleration change curve of each body is not 0, the degree of motion of each body is determined based on the change trend of the acceleration change curve in the time domain, including: when it is determined that the acceleration corresponding to each time point in the acceleration change curve of each body is not 0, the cumulative duration of each acceleration interval in the acceleration change curve in the time domain is respectively used as the time domain span value corresponding to each acceleration interval.

[0072] The acceleration range is divided into multiple sub-ranges based on the absolute value of acceleration, and each sub-range has a preset fresh air setting; the fresh air setting is positively correlated with the lower limit of the acceleration range.

[0073] It should be noted that before step 102, in Figure 2 The acceleration curves shown all use a coordinate axis with time (unit: seconds, range: [0, +∞)) on the horizontal axis and acceleration (unit: meters per second squared, range: [-∞, +∞)) on the vertical axis to show their trend.

[0074] Therefore, it is necessary to divide the acceleration of the vertical axis into at least two continuous value intervals so as to characterize different degrees of motion through different rates of change of velocity.

[0075] For example, based on the four pre-set fresh air speed settings in the fresh air system with different fresh air fan speeds, namely low-speed fresh air setting, medium-speed fresh air setting, high-speed fresh air setting, and strong fresh air setting, four acceleration intervals can be divided on the vertical axis according to the absolute value of the acceleration, namely [0,A), [A,B), [B,C), and [C,+∞).

[0076] In this system, as the fan speeds of the four fresh air settings increase, the lower limits of the four acceleration ranges (0, A, B, and C) can increase sequentially according to corresponding geometric or arithmetic progressions. For example, A can be set to 0.5 m / s². 2 B can take the value 1.5 m / s 2 C can take the value 2.5 m / s 2 .

[0077] Specifically, in step 102, the radar-based air conditioning fresh air control device determines that the acceleration is continuously changing (i.e., as shown in the acceleration change curve) through the acceleration change curve. Figure 2 As shown in the figure, the duration of each acceleration interval is accumulated and summed in turn, and the accumulated duration of each acceleration interval is output as the corresponding time domain span value.

[0078] The degree of motion of an individual is determined based on the acceleration range corresponding to the maximum time span value.

[0079] Specifically, the radar-based air conditioning fresh air control device selects the maximum time span value from all acceleration ranges on the horizontal axis. It can then directly output the acceleration range corresponding to the maximum time span value as the individual's motion level. In subsequent steps, the corresponding relationship between the acceleration range and the fresh air level can be used to map the required fresh air level.

[0080] Optionally, an artificial intelligence model can be trained using a large amount of sample data. By applying the model to the acceleration range corresponding to the maximum time span value and the motion trajectory within the period, the degree of motion of an individual can be quantified. The value of the degree of motion can be any percentage between 0 and 1. In subsequent steps, the linear relationship between the degree of motion and the speed of the fresh air fan can be used to map the speed of the fresh air fan that needs to be adjusted.

[0081] In this embodiment of the invention, when determining that the acceleration change curve indicates the variable speed motion of an individual, the decision is to statistically analyze the time-domain span distribution of each acceleration interval within the period of the acceleration change curve, and use the acceleration interval corresponding to the maximum time-domain span value to quantify the degree of motion of the individual, so that the fan speed of the fresh air system can be adjusted to a target value that matches the degree of motion of the individual. By performing time-domain analysis on the trend of acceleration changing over time, higher time precision and accuracy are achieved, making it easier to capture changes in the degree of motion and improving the control precision of the fresh air system.

[0082] Based on any of the above embodiments, the target fresh air speed value is determined based on the degree of movement of all individuals, including: statistically analyzing the fresh air speed value corresponding to the fresh air level that matches the degree of movement of each individual, and determining the target fresh air speed value.

[0083] Specifically, in step 103, after the radar-based air conditioning fresh air control device determines the fresh air level corresponding to the degree of movement of each individual in the space in step 102, it performs statistical analysis on the pre-set fresh air speed values ​​of the fresh air levels adapted to multiple individuals to obtain the target fresh air speed value.

[0084] The target fresh air rotation speed can be the mean, mode, or median of the fresh air rotation speeds preset for multiple individuals at their respective fresh air settings. This embodiment of the invention does not impose specific limitations on it.

[0085] This invention utilizes statistical analysis of the motion level quantified by the acceleration interval corresponding to the maximum time-domain span value in the acceleration change curve for each individual to obtain a target fresh air rotation speed value that matches the group's motion level. This improves the control accuracy of the fresh air system and optimizes the user experience while meeting the group's fresh air volume requirements.

[0086] Based on any of the above embodiments, determining the acceleration change curve based on the individual position information collected by the radar module within a preset period includes: determining the displacement change curve of the corresponding individual based on the individual position information collected by the radar module within a preset period.

[0087] Specifically, in step 101, the radar-based air conditioning fresh air control device receives the individual position information collected by the radar module for any individual within a preset period, calculates the displacement distance between the individual position information of the same individual at two adjacent time points, and obtains the displacement change curve of the individual's displacement distance as a function of time, the expression of which is as follows:

[0088]

[0089] In this displacement curve, the independent variable is time t, and the dependent variable S(t) describes the displacement values ​​at different times. v0 is the instantaneous velocity at t=0, which is the instantaneous velocity corresponding to the initial moment of the current period. a is the acceleration.

[0090] The acceleration change curve is obtained by taking the second derivative of the displacement change curve.

[0091] Specifically, the radar-based air conditioning fresh air control device calculates the first derivative of displacement with respect to time using the displacement change curve. This is the rate of change of displacement with time, and its physical meaning is velocity. Continuing to calculate the second derivative with respect to time, we obtain the rate of change of displacement with time, which is the rate of change of velocity with time, and its physical meaning is acceleration. The expression is as follows:

[0092] S″(t)=(S′(t))′=(v(t))′=(v0+at)′=a(t)

[0093] In this curve, 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.

[0094] This invention uses the individual's position information perceived by the same individual within a preset period to fit a displacement change curve representing the change of individual displacement over time. Then, by integrating the relationship with time, it obtains an acceleration change curve representing the change of individual acceleration over time, which serves as a basis for quantifying the degree of motion. This allows for precise understanding of the individual's motion over time and quantification of its changes, thereby improving the control accuracy of the fresh air system and optimizing the user experience.

[0095] Based on any of the above embodiments, after determining the acceleration change curve, the method further includes: if it is determined that the acceleration at each time point in the acceleration change curve of at least one individual is 0 and the individual velocity is continuously 0, the fan speed of the fresh air system is adjusted to the rated minimum value.

[0096] If the acceleration at each time point in the acceleration change curve of all individuals is 0, and the instantaneous velocity of each individual is not 0, the target fresh air speed value is determined based on the velocity corresponding to the uniform motion of all individuals within the preset period, so that the air conditioner can adjust the fan speed of the fresh air system to the target fresh air speed value.

[0097] Specifically, after step 101, if the radar-based air conditioning fresh air control device analyzes the acceleration change trend of each individual's acceleration change curve and determines that the individual is not in variable motion, further judgment needs to be made by combining the individual's instantaneous velocity:

[0098] If the acceleration at each time point in the acceleration change curve of at least one individual is 0, and the instantaneous velocity of the individual within the period is continuously 0, it indicates that the individual is in a static state within the period. Therefore, it is determined that the individual has a tendency to sleep, or that the individual belongs to a vulnerable group such as infants, the elderly, etc. Since their need for fresh air replenishment is very small when they are not active, the fan speed of the fresh air system can be directly adjusted to the rated minimum value in order to take care of vulnerable groups.

[0099] If the acceleration at each time point in the acceleration change curve of all individuals is 0, and the instantaneous velocity of the individuals within the period is not 0, it means that all individuals in the indoor space are moving at a constant speed at the corresponding instantaneous velocity and are in different degrees of motion. Therefore, it is assumed that the activity level of the individuals in the indoor space is relatively fixed, and their demand for fresh air replenishment is determined by the speed of the uniform motion of the individuals. When all individuals in the indoor space are moving at the same constant speed, the corresponding fresh air speed value can be mapped according to the correspondence between speed and the fan speed of the fresh air system, and this value can be used as a target value to guide the fresh air system to adjust the fan speed.

[0100] Understandably, when each individual in the room moves at a constant speed to varying degrees, the speed of all individuals' constant motion can be statistically analyzed first. By mapping the correspondence between the speed and the fan speed of the fresh air system, the fresh air speed corresponding to the statistical mean, median, or mode speed can be obtained. This value can then be used as a target value to guide the fresh air system to adjust the fan speed.

[0101] In this embodiment of the invention, when the acceleration change curve indicates that an individual is not in variable speed motion, the decision is to further distinguish whether the individual is in a stationary state or a uniform motion state by combining the instantaneous velocity of each individual, and to make appropriate adjustments to the fan speed of the fresh air system based on the individual's intention tendency in different states. This can improve the control accuracy and efficiency of the fresh air system while taking into account individual differences and group needs, and take into account the user's fresh air experience and exercise experience.

[0102] Based on any of the above embodiments, the method further includes: shutting down the fresh air system when it is determined by the radar module that there are no individuals in the room.

[0103] Specifically, after determining the start-up working mode of the air conditioner, the radar-based air conditioning fresh air control device detects that there are no human individuals in the space where the air conditioner is located through the radar module deployed in the indoor unit, and shuts down the fresh air system, only controlling the indoor and outdoor units to achieve the heat exchange function.

[0104] For example, Figure 3 This is the second flowchart illustrating the radar-based fresh air control method for air conditioning provided by this invention. Figure 3 As shown in the figure, this invention provides a specific implementation method for a radar-based air conditioning fresh air control method:

[0105] (1) After the air conditioner is turned on, the radar module collects signals of people in the room. If no one is present, proceed to step (2). If someone is present, proceed to step (3).

[0106] (2) Turn off the fresh air system.

[0107] (3) After activating the fresh air system, the radar module captures the real-time displacement trajectory of individuals, extracts the acceleration change curve of the internal acceleration 'a' over time for each preset cycle, and pre-divides the acceleration values ​​into 4 acceleration intervals:

[0108] Zone 1, a∈(-A, +A);

[0109] Area 2, α∈(-B,-A]∪[+A,+B);

[0110] Region 3, a∈(-C, -B]∪[+B, +C);

[0111] Region 4, α∈(-∞, -C]∪[+C, +∞);

[0112] (4) Based on the acceleration change curve, the time domain span of acceleration in different acceleration intervals within 10 minutes is calculated. That is, T1 is the time domain span value corresponding to zone 1, and so on. T2, T3 and T4 are the time domain span values ​​corresponding to zones 2, 3 and 4, respectively.

[0113] (5) Sort T1, T2, T3 and T4 by size and select the largest time span value T.

[0114] If T is the time span value T1 corresponding to zone 1, then the fresh air system will be turned on at level 1.

[0115] If T is the time span value T2 corresponding to zone 2, then the fresh air system will be turned on at level 2.

[0116] If T is the time span value T3 corresponding to zone 3, then the fresh air system will be set to level 3.

[0117] If T is the time span value T4 corresponding to zone 4, then the fresh air system will be set to level 4.

[0118] In this embodiment of the invention, the fresh air system is shut down directly when the radar module detects that no one is present in the room, thus avoiding unnecessary energy consumption.

[0119] Figure 4 This is a schematic diagram of the radar-based air conditioning fresh air control device provided by the present invention. Based on any of the above embodiments, such as... Figure 4 As shown, the device includes an acceleration analysis module 410, a motion degree analysis module 420, and a first fresh air control module 430, wherein:

[0120] The acceleration analysis module 410 is used to activate the fresh air system when the radar module determines that at least one individual is present indoors, and to determine the acceleration change curve based on the individual position information collected by the radar module within a preset period.

[0121] The motion degree analysis module 420 is used to determine the motion degree of each body based on the time domain change trend of the acceleration change curve, provided that the acceleration at each time point in the acceleration change curve of each body is not zero.

[0122] The first fresh air control module 430 is used to determine a target fresh air speed value based on the activity level of all individuals, so that the air conditioner can adjust the fan speed of the fresh air system to the target fresh air speed value.

[0123] Specifically, the acceleration analysis module 410, the motion degree analysis module 420, and the first fresh air control module 430 are electrically connected in sequence.

[0124] When the air conditioner is turned on, the acceleration analysis module 410 senses the presence of a human being in the space where the fresh air air conditioner is located through the radar module deployed in the indoor unit. At the same time as turning on the fresh air system, it also receives the real-time position information collected by the radar module for each individual in the indoor space. It analyzes the displacement trajectory corresponding to the position information of any individual collected within a preset period, and integrates the rate of change of velocity of the individual during the displacement within that period into the acceleration change curve of the corresponding individual.

[0125] The motion degree analysis module 420 analyzes the acceleration change trend presented by the acceleration change curve of each individual:

[0126] If the acceleration at each time point in the acceleration change curve is not zero, it means that the individual is undergoing variable motion within the period. Therefore, it is necessary to analyze the trend of acceleration change in the acceleration change curve. When the acceleration changes in the time domain, the maximum acceleration value in the longest time interval on the horizontal axis can be characterized as the degree of motion of the corresponding individual.

[0127] If the first fresh air control module 430 senses that there is only one individual in the space, it can directly compare the degree of movement of that individual with the pre-set mapping relationship between the degree of movement and the speed value of the fresh air fan, and take the speed value of the fresh air fan that matches the degree of movement of that individual as the target fresh air speed value.

[0128] Alternatively, if multiple individuals are detected in the space, the degree of movement of all individuals can be statistically analyzed. For example, the mean, mode, and median of the degree of movement of multiple individuals can be taken and compared with the pre-set mapping relationship between the degree of movement and the speed value of the fresh air fan. The speed value of the fresh air fan that matches the statistically obtained degree of movement can be used as the target fresh air speed value.

[0129] Next, the radar-based air conditioning fresh air control device encapsulates the target fresh air speed value into a fresh air control command and sends it to the relevant components of the fresh air system. This allows the fresh air system to adjust the actual fresh air speed of the fresh air fan in the default operating mode to the target fresh air speed value under the control of the corresponding command. The amount of fresh air supplied changes accordingly as the speed of the fresh air fan is adjusted.

[0130] Optionally, the motion level analysis module 420 includes a time-domain analysis unit and a motion level analysis unit, wherein:

[0131] The time-domain analysis unit is used to determine the cumulative duration of each acceleration interval in the acceleration change curve in the time domain as the time-domain span value corresponding to each acceleration interval, provided that the acceleration at each time point in the acceleration change curve of each individual is not zero.

[0132] The motion degree analysis unit is used to determine the motion degree of an individual based on the acceleration interval corresponding to the maximum time domain span value.

[0133] The acceleration range is divided into multiple sub-ranges based on the absolute value of acceleration, and each sub-range has a preset fresh air setting; the fresh air setting is positively correlated with the lower limit of the acceleration range.

[0134] Optionally, the first fresh air control module 430 is specifically used to perform statistical analysis on the fresh air speed value corresponding to the fresh air level that matches the degree of movement of each individual, and to determine the target fresh air speed value.

[0135] Optionally, the acceleration analysis module 410 includes a displacement analysis unit and an acceleration analysis unit, wherein:

[0136] The displacement analysis unit is used to determine the displacement change curve of the corresponding individual based on the individual position information collected by the radar module within a preset period.

[0137] An acceleration analysis unit is used to perform second-order differentiation on the displacement change curve to obtain the acceleration change curve.

[0138] Optionally, the device further includes a second fresh air control module and a third fresh air control module, wherein:

[0139] The second fresh air control module is used to adjust the fan speed of the fresh air system to the rated minimum value if it is determined that the acceleration of at least one individual is 0 at each time point in the acceleration change curve and the individual speed is 0.

[0140] The third fresh air control module is used to determine the target fresh air speed value based on the speed of all individuals moving at a constant speed within a preset period, when 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, so that the air conditioner can adjust the fan speed of the fresh air system to the target fresh air speed value.

[0141] Optionally, the device also includes a fourth fresh air control module, wherein:

[0142] The fourth fresh air control module is used to shut down the fresh air system when the radar module determines that there are no individuals in the room.

[0143] The radar-based air conditioning fresh air control device provided in this embodiment of the invention is used to execute the radar-based air conditioning fresh air control method of the present invention. Its implementation method is the same as that of the radar-based air conditioning fresh air control method provided in this invention, and it can achieve the same beneficial effects. It will not be described again here.

[0144] This invention activates the fresh air system when a radar module detects the presence of an individual indoors. Based on the individual's positional trajectory monitored by the radar module over a preset period, a corresponding acceleration change curve is fitted. When the acceleration change curve indicates variable speed movement of the individual, the decision is made to characterize the degree of movement by utilizing the time-domain trend of acceleration in the acceleration change curve. This allows for the adjustment of the fresh air system's fan speed to a target value that matches the degree of movement. This achieves the analysis of the degree of movement based on the individual's acceleration changes within a period and adaptively adjusts the fresh air system's fan speed. This eliminates the need for manual setting of the fresh air operation mode during movement, enabling adaptive fresh air control based on the movement state while ensuring that the fresh air supply matches the individual's movement intensity. This improves the control accuracy and efficiency of the fresh air system, balancing the user's fresh air experience and exercise experience.

[0145] Figure 5 This is a structural schematic diagram of the fresh air conditioner provided by the present invention. Based on any of the above embodiments, such as... Figure 5 As shown, the fresh air air conditioner includes an indoor unit 510, an outdoor unit 520, and a fresh air system 530. The indoor unit 510 is equipped with a control processor 511 and a radar module 512, with the radar module 512 disposed on the surface of the indoor unit's casing. It also includes a memory and programs or instructions stored in the memory and executable on the control processor 511. When the control processor 511 executes the program or instructions, it performs the radar-based fresh air control method described above.

[0146] The radar module 512 includes a millimeter-wave radar.

[0147] Specifically, the fresh air air conditioner is equipped with an indoor unit 510, an outdoor unit 520, and a fresh air system 530. A radar module 512 is embedded on the surface of the casing of the indoor unit 510. When the control processor 511 detects the presence of a human individual in the space where the fresh air air conditioner is located based on the radar module 512, it turns on the fresh air system and receives the real-time position information collected by the radar module 512 for each individual in the indoor space. It then analyzes the displacement trajectory corresponding to the position information of any individual collected within a preset period and integrates the rate of change of velocity of the individual during the displacement within that period into the acceleration change curve of the corresponding individual.

[0148] The control processor 511 analyzes the acceleration change trend presented by the acceleration change curve of each individual:

[0149] If the acceleration at each time point in the acceleration change curve is not zero, it indicates that the individual is undergoing variable motion within the period. In this case, it is necessary to analyze the trend of acceleration in the acceleration change curve. The maximum acceleration value in the longest time interval on the horizontal axis when the acceleration changes in the time domain can be represented as the degree of motion of the corresponding individual.

[0150] If the acceleration at each time point in the acceleration change curve is 0, it means that the individual is in a state of uniform motion or stillness within the period. In this case, it is necessary to further judge the activity state by combining the individual's instantaneous velocity within the period.

[0151] The control processor 511, referring to the pre-set mapping relationship between the degree of exercise and the speed of the fresh air fan, encapsulates the target fresh air speed value of the fresh air fan, matching the individual's degree of exercise, into a fresh air control command and sends it accordingly to the fresh air system 530. This allows the fresh air system 530, under the control of the corresponding command, to adjust the actual fresh air fan speed in the default operating mode to the target fresh air speed value, thus adjusting the fresh air supply accordingly.

[0152] This invention activates the fresh air system when a radar module detects the presence of an individual indoors. Based on the individual's positional trajectory monitored by the radar module over a preset period, a corresponding acceleration change curve is fitted. When the acceleration change curve indicates variable speed movement of the individual, the decision is made to characterize the degree of movement by utilizing the time-domain trend of acceleration in the acceleration change curve. This allows for the adjustment of the fresh air system's fan speed to a target value that matches the degree of movement. This achieves the analysis of the degree of movement based on the individual's acceleration changes within a period and adaptively adjusts the fresh air system's fan speed. This eliminates the need for manual setting of the fresh air operation mode during movement, enabling adaptive fresh air control based on the movement state while ensuring that the fresh air supply matches the individual's movement intensity. This improves the control accuracy and efficiency of the fresh air system, balancing the user's fresh air experience and exercise experience.

[0153] Furthermore, the logical instructions in the aforementioned memory can be implemented as software functional units and sold or used as independent products, and can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0154] On the other hand, the present invention also provides a computer program product, which includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the radar-based air conditioning fresh air control method provided by the above methods. The method includes: activating the fresh air system when it is determined by a radar module that at least one individual exists indoors, and determining an acceleration change curve based on the individual's position information collected by the radar module within a preset period; determining the degree of motion of each individual based on the time-domain change trend of the acceleration change curve when it is determined that the acceleration at each time point in the acceleration change curve of each individual is not zero; and determining a target fresh air speed value based on the degree of motion of all individuals, so that the air conditioner can adjust the fan speed of the fresh air system to the target fresh air speed value.

[0155] In another aspect, the present invention also provides a non-transitory computer-readable storage medium storing a computer program thereon. When executed by a processor, the computer program is implemented to perform the radar-based air conditioning fresh air control method provided by the above methods. The method includes: activating the fresh air system when it is determined by a radar module that at least one individual exists indoors, and determining an acceleration change curve based on the individual's position information collected by the radar module within a preset period; determining the degree of motion of each individual based on the time-domain trend of the acceleration change curve when it is determined that the acceleration at each time point in the acceleration change curve of each individual is not zero; and determining a target fresh air speed value based on the degree of motion of all individuals, so that the air conditioner can adjust the fan speed of the fresh air system to the target fresh air speed value.

[0156] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0157] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0158] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A radar-based method for controlling fresh air in an air conditioning system, characterized in that, include: If the radar module determines that at least one individual is present indoors, the fresh air system is activated, and the acceleration change curve is determined based on the individual's location information collected by the radar module within a preset period. Given that the acceleration at each time point in the acceleration change curve of each individual is not zero, the degree of motion of each individual is determined based on the change trend of the acceleration change curve in the time domain. Based on the activity level of all individuals, a target fresh air speed value is determined so that the air conditioner can adjust the fan speed of the fresh air system to the target fresh air speed value. The determination of the degree of motion of each individual based on the time-domain trend of the acceleration change curve, assuming that the acceleration at each time point in the acceleration change curve of each individual is not zero, includes: If it is determined that the acceleration at each time point in the acceleration change curve of each individual is not zero, the cumulative duration of each acceleration interval in the acceleration change curve in the time domain will be used as the time domain span value corresponding to each acceleration interval. The degree of motion of an individual is determined based on the acceleration range corresponding to the maximum time span value; The acceleration range is divided into multiple sub-ranges based on the absolute value of acceleration, and each sub-range has a preset fresh air setting; the fresh air setting is positively correlated with the lower limit of the acceleration range.

2. The radar-based air conditioning fresh air control method according to claim 1, characterized in that, The determination of the target fresh air rotation speed based on the activity level of all individuals includes: Statistical analysis is performed on the fresh air speed values ​​corresponding to the fresh air level that matches the degree of movement of each individual to determine the target fresh air speed value.

3. The radar-based air conditioning fresh air control method according to claim 1, characterized in that, The step of determining the acceleration change curve based on the individual position information collected by the radar module within a preset period includes: Based on the individual position information collected by the radar module within a preset period, the displacement change curve of the corresponding individual is determined. The acceleration change curve is obtained by taking the second derivative of the displacement change curve.

4. The radar-based air conditioning fresh air control method according to claim 1, characterized in that, After determining the acceleration change curve, the following is also included: If it is determined that at least one individual has an acceleration of 0 at each time point in its acceleration change curve, and the individual's velocity remains at 0, then the fan speed of the fresh air system should be adjusted to the rated minimum value. If the acceleration at each time point in the acceleration change curve of all individuals is 0, and the instantaneous velocity of each individual is not 0, the target fresh air speed value is determined based on the velocity corresponding to the uniform motion of all individuals within the preset period, so that the air conditioner can adjust the fan speed of the fresh air system to the target fresh air speed value.

5. The radar-based air conditioning fresh air control method according to any one of claims 1-4, characterized in that, Also includes: If the radar module determines that there are no individuals present indoors, shut down the fresh air system.

6. A radar-based air conditioning fresh air control device, characterized in that, include: The acceleration analysis module is used to activate the fresh air system when the radar module determines that at least one individual is present indoors, and to determine the acceleration change curve based on the individual's position information collected by the radar module within a preset period. The motion degree analysis module is used to determine the motion degree of each individual based on the time-domain variation trend of the acceleration change curve, provided that the acceleration at each time point in the acceleration change curve of each individual is not zero. The first fresh air control module is used to determine the target fresh air speed value based on the activity level of all individuals, so that the air conditioner can adjust the fan speed of the fresh air system to the target fresh air speed value. The determination of the degree of motion of each individual based on the time-domain trend of the acceleration change curve, assuming that the acceleration at each time point in the acceleration change curve of each individual is not zero, includes: If it is determined that the acceleration at each time point in the acceleration change curve of each individual is not zero, the cumulative duration of each acceleration interval in the acceleration change curve in the time domain will be used as the time domain span value corresponding to each acceleration interval. The degree of motion of an individual is determined based on the acceleration range corresponding to the maximum time span value; The acceleration range is divided into multiple sub-ranges based on the absolute value of acceleration, and each sub-range has a preset fresh air setting; the fresh air setting is positively correlated with the lower limit of the acceleration range.

7. A fresh air air conditioner, comprising an indoor unit, an outdoor unit, and a fresh air system, characterized in that, The indoor unit is provided with a control processor and a radar module, the radar module being disposed on the surface of the housing of the indoor unit; it also includes a memory and a program or instructions stored in the memory and executable on the control processor, the program or instructions being executed by the control processor to perform the radar-based air conditioning fresh air control method as described in any one of claims 1 to 5; The radar module includes a millimeter-wave radar.

8. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the radar-based air conditioning fresh air control method as described in any one of claims 1 to 5.

9. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the radar-based air conditioning fresh air control method as described in any one of claims 1 to 5.

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