Intelligent portable ozone disinfector and control method thereof

Abstract

The embodiment of the present invention discloses an intelligent portable ozone disinfector and a control method thereof, wherein the disinfector is composed of a human body sensor, an acceleration sensor, a central processing unit, an ozone generator, a command switch, and a power management unit, wherein the human body sensor, the acceleration sensor, the ozone generator, the command switch, and the power management unit are all connected to the central processing unit. The present invention can accurately determine the presence of human bodies around, ensuring that the human body is not harmed during disinfection, that is, ozone disinfection is performed only after it is determined that a person has left, and when a person approaches in the middle of the journey, ozone disinfection is stopped. During and after the disinfection process, the user is reminded to pay attention to safety through prompts and voice units; the present invention can also accurately determine the use environment of the disinfector, and can intelligently determine whether it is a home office environment or a car environment, and execute different disinfection modes accordingly.

Description

Technical Field

[0001] The present invention relates to the field of vehicle-mounted electronic equipment, and in particular to an intelligent portable ozone sterilizer and a control method thereof. Background Art

[0002] Ozone disinfection and ozone disinfection cabinets in homes are already well-known technologies. Ozone disinfection can kill many viruses and bacteria. Different from the closed working environment of disinfection cabinets, if ozone is used to disinfect air and objects in open spaces, such as offices, wardrobes, cars, and the wild, where people are in the same space, although it can kill many viruses and bacteria, excessive inhalation by the human body will cause discomfort to the body.

[0003] Therefore, it is necessary to have a portable disinfection system that can be used everywhere and can also take into account the protection of the human body during the disinfection process. In other words, ozone disinfection should only be started after people leave.

[0004] Therefore, the present invention introduces intelligent control, which effectively controls the working time of the ozone disinfector by analyzing the surrounding human body and environment, so that the disinfection is automatically started after people leave, ensuring the safety of people. At the same time, it can also identify working scenes, such as static environment (for office or home use) and dynamic environment (for use in vehicles), and effectively control the length and concentration of ozone disinfection time according to the environment central processor. For example, the disinfection time and concentration in the enclosed space of the car can be weaker, otherwise the residual concentration of ozone will also be uncomfortable to the human body; in the open space of the office, the ozone concentration is diluted at any time, so the disinfection time and concentration must be increased. In order to achieve more portability, the power supply is equipped with a rechargeable battery in addition to the external power supply to adapt to the use in various scenes. Summary of the invention

[0005] The technical problem to be solved by the embodiments of the present invention is to provide an intelligent portable ozone sterilizer and a control method thereof, so as to achieve portable sterilization and take into account the protection of the human body during the sterilization process.

[0006] In order to solve the above technical problems, an embodiment of the present invention proposes an intelligent portable ozone sterilizer, which is composed of a human body sensor, an acceleration sensor, a central processing unit, an ozone generator, a command switch, a prompt and voice unit, and a power management unit, wherein the human body sensor, the acceleration sensor, the prompt and voice unit, the ozone generator, the command switch and the power management unit are all connected to the central processing unit.

[0007] Furthermore, the human body sensor provides the central processor with human body sensing information around the sterilizer, and the central processor analyzes and calculates according to the information to determine whether there is a human body around; when it is determined that there is a person around, the central processor controls the ozone generator to stop working, and when there is no one around the sterilizer, the central processor controls the ozone generator to run or stop working.

[0008] Furthermore, the human body sensor is a microwave radar sensor or an infrared detection sensor, the prompt and voice unit includes sound and light prompts and voice prompt functions, and the central processing unit provides safety prompts for the use of the sterilizer through the prompt and voice unit.

[0009] Furthermore, the acceleration sensor provides the central processor with dynamic information of the sterilizer. After analyzing and calculating the information, the central processor determines the scene in which the sterilizer is located. The central processor controls the time and output concentration of the ozone generator differently according to different usage scenarios.

[0010] Furthermore, the power management unit includes two power supplies: an external power supply and a rechargeable battery. The external power supply is provided by an external power supply of a USB port. When the external power supply is provided, the rechargeable battery is charged. When the external power supply stops, the rechargeable battery is responsible for supplying power.

[0011] Accordingly, an embodiment of the present invention further provides a control method for an intelligent portable ozone sterilizer, comprising:

[0012] Step 1: The command switch sends a "start" command to the CPU according to the user settings;

[0013] Step 2: The human body sensor senses the surrounding human body information and transmits the surrounding human body sensing information to the central processor; when there is human movement around, the human body sensor sends effective potential information to the central processor; when the central processor recognizes the effective potential information, it determines that there are people around and sets the delay counter T1 value; T1 value decreases regularly; if it is continuously detected that someone is approaching, the delay counter T1 value is constantly reset, so that the T1 value always decreases to less than 0;

[0014] Step 3: After a period of time when people around leave, the delay counter T1 value decreases to 0, and the central processor determines that there is no one around, and then determines that the ozone generator has the conditions to start;

[0015] Step 4: If the CPU receives valid potential information from the human sensor during the operation of the ozone generator, the CPU determines that someone is approaching, resets the delay counter T1 value, controls the ozone generator to stop working, and returns to step 2;

[0016] Step 5: The acceleration sensor transmits the three-dimensional acceleration data to the central processing unit. The central processing unit determines whether the use environment of the disinfector is a non-vehicle environment or a vehicle environment based on the three-dimensional acceleration data. The central processing unit also performs calculations. When the three-dimensional acceleration is 0, it is determined to be a stationary state; when the acceleration value keeps changing, it is determined to be a driving state, and the acceleration delay counter T2 value is set; in the driving state, as the acceleration data is continuously generated, the acceleration delay counter T2 value is continuously reset, and at the same time, the central processing unit prohibits the ozone generator from working;

[0017] Step 6: When the value of the acceleration delay counter T2 decreases to 0, the central processor determines that the vehicle is in a stopped state;

[0018] Step 7: If the central processor determines that the use environment of the sterilizer is a non-vehicle environment, and the ozone generator has the start-up conditions in step 3, the central processor controls the ozone generator to start; if the central processor determines that the use environment of the sterilizer is in a vehicle, and the ozone generator has the start-up conditions in step 3, the parking state in step 6 is met, and the external power supply is stopped, the central processor controls the ozone generator to start.

[0019] Furthermore, after step 7, the method further includes:

[0020] Step 8: Within the preset time after each disinfection, if the central processor detects someone approaching through the human body sensor, the driver prompts and the voice unit will issue a prompt to remind people not to approach or ventilate to dilute the ozone residue.

[0021] Furthermore, after step 8, the method further includes:

[0022] Step 9: When the external power supply is connected, if the ozone sterilizer is working, suspend charging the battery to ensure that the external power supply does not exceed 1A current.

[0023] The beneficial effects of the present invention are as follows: the present invention can accurately judge the presence of human bodies around, and ensure that the human bodies are not harmed during disinfection, that is, ozone disinfection is performed only after it is determined that people have left, and ozone disinfection is stopped when people approach in the middle of the journey; the present invention can accurately judge different usage scenarios, and when it is confirmed that it is used in a confined space, such as in a vehicle, the time and concentration of ozone disinfection are appropriately reduced, while in open spaces such as offices and homes, the disinfection time and ozone concentration are appropriately increased; if it is confirmed that it is used in a car, the premise of disinfection is not only that the people in the car leave the car, but also that the vehicle is turned off, that is, the external power supply stops supplying power; the present invention can also effectively manage the power supply intelligently, achieve power distribution between disinfection power and charging power, and suppress excessive current from destroying the USB power supply; the present invention also provides safety reminders to people during the residual time after disinfection, and realizes safety protection for users through ventilation or temporary shelter. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of an intelligent portable ozone sterilizer according to an embodiment of the present invention.

[0025] Figure 2 It is a circuit structure diagram of the intelligent portable ozone sterilizer according to an embodiment of the present invention.

[0026] Figure 3 It is a flow chart of a control method of an intelligent portable ozone sterilizer according to an embodiment of the present invention. DETAILED DESCRIPTION

[0027] It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present invention is further described in detail below in conjunction with the drawings and specific embodiments.

[0028] In the embodiments of the present invention, if there are directional indications (such as up, down, left, right, front, back, etc.), they are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0030] Please refer to Figure 1 and Figure 2 The intelligent portable ozone sterilizer of the embodiment of the present invention includes a human body sensor, an acceleration sensor, a central processing unit, an ozone generator, a command switch, a prompt and voice unit, and a power management unit.

[0031] The human body sensor, acceleration sensor, ozone generator, prompt and voice unit, command switch and power management unit are all connected to the central processor. The central processor can control the start and stop of the ozone generator, the working time and the ozone concentration.

[0032] As an implementation method, the human body sensor provides the central processing unit with human body sensing information around the sterilizer, and the central processing unit analyzes and calculates based on the information to determine whether there is a human body around; when it is determined that there is a person around, the central processing unit controls the ozone generator to stop working, and when there is no one around the sterilizer, the central processing unit controls the ozone generator to run or stop working.

[0033] The central processing unit processes the received human body sensing information as follows:

[0034] 1) Set a time period T1 (i.e. set a delay counter T1) for each human approach information. When the human leaves, the T1 value decreases. If another person approaches in the middle, T1 is reset;

[0035] 2) When the human body leaves and the human body sensing disappears, the T1 value decreases. When T1 decreases to 0, it means that there is indeed no one around during this time period.

[0036] The length of the T1 time period represents the reliability of the discrimination. The longer the T1 time period, the more reliable the discrimination.

[0037] As an implementation method, the human body sensor is a microwave radar sensor or an infrared detection sensor. The present invention uses a microwave radar sensor or an infrared sensor as a human body sensor, and the sensing data is input to (but not limited to) the central processor P32 port.

[0038] As an implementation method, the acceleration sensor is implemented by U4, a chip of model QMA7981, and is connected to the central processor through SCL, SDA data transmission lines and P33. The acceleration sensor provides the central processor with the motion information of the disinfector. After the central processor analyzes and calculates the information, it determines the scene in which the disinfector is located. The central processor controls the ozone generator according to different usage scenarios. When the smart portable ozone disinfector is used in the car, the acceleration sensor is used to sense the speed. When the car is stationary, the acceleration data is 0. When the car is driving, the acceleration data is continuously transmitted to the central processor, but the driving is unstable. It stops at a red light, speeds up and slows down, and the data is unstable, so a counter (acceleration delay counter T2) will be established in the program, and this count will be decremented regularly until it is reduced to 0. Whenever there is speed, a value is put into the acceleration delay counter T2 (a data D2 is reset), and then it is decremented regularly. If it is driving, there will be continuous data, and the central processor will continuously put data into the counter T2 (reset), so that the counter will never be reduced to 0. Stopping at a red light only takes a few minutes, but if the value D2 we put into the counter is greater than a few minutes, it will never decrease to 0 during the entire driving section, and the state where the counter is not 0 is regarded as the driving state.

[0039] As an implementation mode, the prompt and voice unit includes sound and light prompts and voice prompt functions, and the central processor provides safety prompts for the use process of the sterilizer through the prompt and voice unit.

[0040] As an implementation method, Figure 2As shown, the power management unit is mainly composed of the U2 chip ETA9870 and the power indicator light (LED1-LED4), which effectively manages the two power supplies of external power supply and rechargeable battery. The external power supply is connected to the 5V power supply via the USB-C port. At this time, the rechargeable battery is charged, and LED1-LED4 displays the battery power; when the external power supply stops supplying, the rechargeable battery is responsible for supplying power. The power management unit effectively manages the two power supplies of external power supply and rechargeable battery. The external power supply is connected to the power supply via the USB port. At this time, the rechargeable battery is charged; when the external power supply stops supplying power, the rechargeable battery is responsible for supplying power.

[0041] As an implementation method, the central processing unit is connected to the power management and can sense whether an external power source is connected;

[0042] As an implementation method, Figure 2 As shown, the ozone generator is powered by transistors Q1-Q3 and distributes power through relay K1, so that when the external power supply is supplied, the ozone generator and battery charging will not be carried out at the same time, so that the external input power will not exceed the rated output range. The ozone sterilizer automatically distributes power to the external power supply, and when the ozone generator is working, the battery charging current is reduced or suspended.

[0043] Please refer to Figure 3 The control method of the intelligent portable ozone sterilizer of an embodiment of the present invention includes steps 1 to 7.

[0044] Step 1: The command switch sends a "start" command to the CPU according to the user settings;

[0045] Step 2: The human body sensor senses the surrounding human body information and transmits the surrounding human body sensing information to the central processor; when there is human movement around, the human body sensor sends effective potential information to the central processor; when the central processor recognizes the effective potential information, it determines that there are people around and sets the delay counter T1 value; T1 value decreases regularly; if it is continuously detected that someone is approaching, the delay counter T1 value is constantly reset, so that the T1 value always decreases to less than 0;

[0046] Step 3: After a period of time when people around leave, the delay counter T1 value decreases to 0, and the central processor determines that there is no one around, and then determines that the ozone generator has the conditions to start;

[0047] Step 4: If the CPU receives valid potential information from the human sensor during the operation of the ozone generator, the CPU determines that someone is approaching, resets the delay counter T1 value, controls the ozone generator to stop working, and returns to step 2;

[0048] Step 5: The acceleration sensor transmits the three-dimensional acceleration data to the central processing unit. The central processing unit determines whether the use environment of the disinfector is a non-vehicle environment or a vehicle environment based on the three-dimensional acceleration data. The central processing unit also performs calculations. When the three-dimensional acceleration is 0, it is determined to be a stationary state; when the acceleration value keeps changing, it is determined to be a driving state, and the acceleration delay counter T2 value is set; in the driving state, as the acceleration data is continuously generated, the acceleration delay counter T2 value is continuously reset, and at the same time, the central processing unit prohibits the ozone generator from working;

[0049] Step 6: When the value of the acceleration delay counter T2 decreases to 0, the central processor determines that the vehicle is in a stopped state;

[0050] Step 7: If the central processor determines that the use environment of the sterilizer is a non-vehicle environment, and the ozone generator has the start-up conditions in step 3, the central processor controls the ozone generator to start; if the central processor determines that the use environment of the sterilizer is in a vehicle, and the ozone generator has the start-up conditions in step 3, the parking state in step 6 is met, and the external power supply is stopped, the central processor controls the ozone generator to start.

[0051] As an implementation manner, after step 7, the method further includes:

[0052] Step 8: Within the preset time after each disinfection, if the central processor detects someone approaching through the human body sensor, the driver prompts and the voice unit will issue a prompt to remind people not to approach or ventilate to dilute the ozone residue.

[0053] As an implementation manner, after step 8, the method further includes:

[0054] Step 9: When the external power supply is connected, if the ozone sterilizer is working, suspend charging the battery to ensure that the external power supply does not exceed 1A current.

[0055] If someone approaches the ozone generator while it is working, the value of the delay counter T1 will be reset and the central processor will control the ozone generator to stop working.

[0056] The embodiment of the present invention adopts the delay counter T1, which eliminates various uncertain factors during use and ensures that the ozone generator is started only when there is no one around, thereby ensuring human safety.

[0057] When the smart portable ozone disinfector is placed in the car for use, the acceleration sensor is used to sense the speed, which is 0 when stationary. When the car is driving, the acceleration data is continuously transmitted to the central processor, but the data is unstable when the car stops at a red light, speeds up and slows down during driving. Therefore, this application sets up an acceleration delay counter T2. This T2 counter is regularly decremented. Whenever there is speed, the acceleration sensor will continuously generate data, and the acceleration delay counter T2 value will be continuously reset, so that the counter T2 will never be reduced to 0, including stopping at a red light in the middle of the journey, which is only a few minutes. However, if the T2 value we set is greater than a few minutes, it will never be reduced to 0 in the entire driving section. We regard the state of the acceleration delay counter T2 not being 0 as the driving state. It is not until the car actually stops for a period of time and the acceleration delay counter T2 slowly decreases to 0 that it is considered to have stopped. The embodiment of the present invention adopts the acceleration delay counter T2 to eliminate the unstable factors during driving.

[0058] If the vehicle is in a driving state and the central processor determines that the disinfector is in use in the vehicle, the ozone generator will be started when the following conditions are met:

[0059] 1. Enter the parking state: the disinfector placed in the vehicle stops with the vehicle;

[0060] 2. External power supply stops: After the vehicle is turned off, the external power supply is turned off and the rechargeable battery is used for power supply.

[0061] The present invention introduces intelligent control: by sensing the surrounding human bodies and analyzing the application scenarios, the timing and output of the ozone disinfector can be safely and effectively controlled to ensure the safety of people, so that disinfection is automatically started after people leave and automatically stopped when people approach; for different usage scenarios, such as the static environment of office or home and the dynamic environment of a closed loop on board (used in a vehicle), the length and concentration of ozone disinfection time are effectively controlled according to the environmental central processor. For example, the disinfection time and concentration in a closed space in a car can be weaker, otherwise the residual ozone concentration will also be uncomfortable to the human body; in an open office space, the ozone concentration is diluted at any time, so the disinfection time and concentration must be increased.

[0062] When the in-car scene is identified, the sterilizer cannot work during driving and before getting off the car to prevent harm to the people in the car. Therefore, strict intelligent judgment is required, and the sterilizer will not be turned on until it is determined that the people in the car have turned off the engine and got off the car;

[0063] Smart safety reminder: after disinfection, when the residue has not yet dissipated, when it senses someone approaching, it will remind people to ventilate or leave temporarily;

[0064] Intelligent power management: In order to achieve greater portability, the power supply is equipped with a rechargeable battery and USB power supply in addition to an external power supply, which is convenient for adapting to various scenarios. Because the USB output current of various devices is usually rated at 1A, and the power required to produce ozone during disinfection is very large, if disinfection and battery charging are performed at the same time, the current is very large and exceeds the USB output rating, so effective power intelligent management is required. Stop battery charging during disinfection, and ensure battery power supply when there is no external power supply.

[0065] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A control method for an intelligent portable ozone sterilizer, characterized in that: The intelligent portable ozone disinfector is composed of a human body sensor, an acceleration sensor, a central processing unit, an ozone generator, a command switch, a prompt and voice unit, and a power management unit, wherein the human body sensor, the acceleration sensor, the prompt and voice unit, the ozone generator, the command switch, and the power management unit are all connected to the central processing unit; The control method comprises: Step 1: The command switch sends a "start" command to the CPU according to the user settings; Step 2: The human body sensor senses the surrounding human body information and transmits the surrounding human body sensing information to the central processor; when there is human movement around, the human body sensor sends effective potential information to the central processor; when the central processor recognizes the effective potential information, it determines that there are people around and sets the delay counter T1 value; T1 value decreases regularly; if it is continuously detected that someone is approaching, the delay counter T1 value is constantly reset, so that the T1 value always decreases to less than 0; Step 3: After a period of time when people around leave, the delay counter T1 value decreases to 0, and the central processor determines that there is no one around, and then determines that the ozone generator has the conditions to start; Step 4: If the CPU receives valid potential information from the human sensor during the operation of the ozone generator, the CPU determines that someone is approaching, resets the delay counter T1 value, controls the ozone generator to stop working, and returns to step 2; Step 5: The acceleration sensor transmits the three-dimensional acceleration data to the central processing unit. The central processing unit determines whether the use environment of the disinfector is a non-vehicle environment or a vehicle environment based on the three-dimensional acceleration data. The central processing unit also performs calculations. When the three-dimensional acceleration is 0, it is determined to be a stationary state; when the acceleration value keeps changing, it is determined to be a driving state, and the acceleration delay counter T2 value is set; in the driving state, as the acceleration data is continuously generated, the acceleration delay counter T2 value is continuously reset, and at the same time, the central processing unit prohibits the ozone generator from working; Step 6: When the value of the acceleration delay counter T2 decreases to 0, the central processor determines that the vehicle is in a stopped state; Step 7: If the central processor determines that the use environment of the sterilizer is a non-vehicle environment, and the ozone generator has the start-up conditions in step 3, the central processor controls the ozone generator to start; if the central processor determines that the use environment of the sterilizer is in a vehicle, and the ozone generator has the start-up conditions in step 3, the parking state in step 6 is met, and the external power supply is stopped, the central processor controls the ozone generator to start.

2. The control method of the intelligent portable ozone sterilizer according to claim 1, characterized in that: After step 7, also include: Step 8: Within the preset time after each disinfection, if the central processor detects someone approaching through the human body sensor, the driver prompts and the voice unit will issue a prompt to remind people not to approach or ventilate to dilute the ozone residue.

3. The control method of the intelligent portable ozone sterilizer according to claim 2, characterized in that: After step 8, the following steps are also included: Step 9: When the external power supply is connected, if the ozone sterilizer is working, suspend charging the battery to ensure that the external power supply does not exceed 1A current.

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