Targeted disinfection device and control method thereof

Abstract

The embodiment of the present invention discloses a targeted disinfection device and a control method thereof, wherein the device comprises a shell, an air inlet and an ozone exhaust port are provided on the shell, a blower is provided in the shell, and the air outlet of the blower is directly opposite to the ozone exhaust port; an ozone generating sheet is provided at the outer side of the shell corresponding to the air outlet; an infrared ranging sensor directly opposite to the ozone exhaust port is provided in the shell, and a human body thermal sensor is provided at one side of the shell corresponding to the ozone exhaust port; a control button is provided on the shell, and a processor, a high-voltage package, a battery, and a power management circuit are also integrated in the shell. The present invention utilizes the principle of directional airflow conveyance by the blower to convey ozone to a preset recommended disinfection position of the targeted disinfection device in front of the targeted disinfection device for accumulation, so that the ozone concentration at the recommended disinfection position reaches the preset disinfection concentration, thereby realizing local and precise targeted disinfection; at the same time, excessive discharge of ozone into the air is avoided, thereby protecting the health of the user.

Description

Technical Field

[0001] The present invention relates to the technical field of portable disinfection, and in particular to a targeted disinfection device and a control method thereof. Background Art

[0002] Ozone is a broad-spectrum and highly efficient disinfectant gas. It has strong activity. By utilizing its own activity, when the ozone concentration reaches a certain range, it has the effect of killing bacteria and viruses on objects. With the development of society, ozone disinfection technology has been applied more and more widely. The existing ozone disinfector directly discharges ozone into a closed space, so that the ozone concentration in the space reaches a certain value, thereby achieving disinfection of the objects in the space.

[0003] Excessive ozone can cause the following harm to the body: 1. It strongly irritates the human respiratory tract, causing sore throat, chest tightness and cough, bronchitis and emphysema; 2. Ozone can cause nerve poisoning, dizziness, headache, vision loss, and memory loss; 3. Ozone can destroy the vitamin E in human skin, causing wrinkles and dark spots on the skin; 4. Ozone can also destroy the human immune function, induce lymphocyte chromosome lesions, and accelerate aging. Therefore, there are two main types of disinfection in existing portable sterilizers: 1. The sterilizer comes with a closable box. When sterilizing, put the items to be sterilized into the box, close the box, and discharge ozone into the box to sterilize the items; 2. Put the sterilizer into a closable space, such as a car or a box.

[0004] However, both of these disinfection methods cannot achieve the effect of local disinfection anytime and anywhere. Summary of the invention

[0005] The technical problem to be solved by the embodiments of the present invention is to provide a targeted disinfection device and a control method thereof to achieve local and precise targeted disinfection.

[0006] In order to solve the above technical problems, an embodiment of the present invention proposes a targeted disinfection device, including a shell, an air inlet and an ozone exhaust port are opened on the shell, a blower is arranged in the shell, and the air outlet of the blower is directly opposite to the ozone exhaust port; an ozone generating sheet is arranged at the outer side of the shell corresponding to the air outlet; an infrared ranging sensor is arranged in the shell facing the ozone exhaust port, and a human body thermal sensor is arranged at one side of the shell corresponding to the ozone exhaust port; control buttons are arranged on the shell, and a processor, a high-voltage package, a battery, and a power management circuit are also integrated in the shell, the processor is electrically connected to the high-voltage package, the power management circuit, the human body thermal sensor, the blower, the infrared ranging sensor and the control buttons, the ozone generating sheet is electrically connected to the high-voltage package, and the battery is electrically connected to the power management circuit.

[0007] Furthermore, the blower outlet wind speed v 初Satisfy the following formula: L is the distance from the preset targeted disinfection device recommended disinfection position to the air outlet, and α is the velocity attenuation coefficient of the airflow in the air.

[0008] Furthermore, the preset air volume F of the blower and the ozone generation amount P of the ozone generating sheet satisfy:

[0009] P is the ozone generation of the ozone generator, in mg / s; F is the preset air volume of the blower, in cm 3 / s; D is the volatility coefficient of ozone concentration over time, Q is the preset disinfection concentration; t is the time it takes for the airflow discharged by the blower to travel from the air outlet to the recommended disinfection position,

[0010] Furthermore, a reference lamp is provided in the shell and faces the ozone exhaust port. The processor is electrically connected to the reference lamp, and the reference lamp emits light in front of the ozone exhaust port.

[0011] Furthermore, a voice module electrically connected to the processor is integrated in the shell.

[0012] Furthermore, a charging line output interface electrically connected to the power management circuit is also provided on the shell.

[0013] Furthermore, the housing is also provided with a pin connector circuit used for charging communication and electrically connected to the processor.

[0014] Furthermore, an angle sensor electrically connected to the processor is integrated in the housing.

[0015] Accordingly, an embodiment of the present invention further provides a control method for a targeted disinfection device, comprising:

[0016] Step 1: When the user presses the control button, the targeted disinfection device starts working, and continuously detects whether there is a human body in front of the ozone exhaust port in real time through the human body thermal sensor, and detects the distance between the targeted disinfection device and the object in front of the ozone exhaust port through the infrared ranging sensor; when a human body is detected, go to step 3; when no human body is detected, and there is no object in front of the ozone exhaust port or the distance to the object is greater than the preset distance S, go to step 3; when no human body is detected, and the distance to the object is less than or equal to the preset distance S, go to step 2;

[0017] Step 2: Control the ozone generating sheet to work, and at the same time control the blower to discharge air at a preset air volume F;

[0018] Step 3: Control the ozone generating sheet and blower to stop working.

[0019] Furthermore, in step 1, when no human body is detected and the distance to the object is detected to be less than or equal to the preset distance S, the angle between the ozone exhaust port and the horizontal plane is detected. If the angle between the ozone exhaust port and the horizontal plane is detected to be greater than the preset angle, step 3 is entered; if the angle between the ozone exhaust port and the horizontal plane is detected to be less than or equal to the preset angle, step 2 is entered.

[0020] Furthermore, the blower outlet wind speed v 初 Satisfy the following formula: L is the distance from the preset targeted disinfection device recommended disinfection position to the air outlet, and α is the velocity attenuation coefficient of the airflow in the air.

[0021] Furthermore, the preset air volume F of the blower and the ozone generation amount P of the ozone generating sheet satisfy:

[0022] P is the ozone generation of the ozone generator, in mg / s; F is the preset air volume of the blower, in cm 3 / s; D is the volatility coefficient of ozone concentration over time, Q is the preset disinfection concentration; t is the time it takes for the airflow discharged by the blower to travel from the air outlet to the recommended disinfection position,

[0023] The beneficial effects of the present invention are as follows: the present invention utilizes the principle of directional airflow conveying by a blower to convey ozone to a preset recommended disinfection position of a targeted disinfection device in front of the targeted disinfection device for accumulation, so that the ozone concentration at the recommended disinfection position reaches a preset disinfection concentration, thereby achieving local and precise targeted disinfection; at the same time, it avoids excessive emission of ozone into the air, thereby protecting the health of users. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional structural diagram of a targeted disinfection device according to an embodiment of the present invention from one angle.

[0025] Figure 2 It is a three-dimensional structural diagram from another angle of the targeted disinfection device of an embodiment of the present invention.

[0026] Figure 3 It is a side view of the targeted disinfection device according to an embodiment of the present invention.

[0027] Figure 4 yes Figure 3 Cross-sectional view at BB in the middle.

[0028] Figure 5 It is a structural block diagram of a targeted disinfection device according to an embodiment of the present invention.

[0029] Figure 6 It is a concentration curve diagram at the recommended disinfection position of the preset targeted disinfection device in an embodiment of the present invention.

[0030] Figure 7 It is a concentration curve diagram of the targeted disinfection device of an embodiment of the present invention during actual disinfection.

[0031] Figure 8 is a circuit diagram of a processor according to an embodiment of the present invention.

[0032] Fig. 9 is a circuit diagram of a power management circuit according to an embodiment of the present invention.

[0033] Fig.10 It is a circuit diagram of a human body thermal sensor and an infrared ranging sensor according to an embodiment of the present invention.

[0034] Fig.11 is a circuit diagram of a pin connector circuit according to an embodiment of the present invention.

[0035] Fig.12 4 is a circuit diagram of a battery interface circuit according to an embodiment of the present invention.

[0036] Fig.13 4 is a circuit diagram of a high-voltage package according to an embodiment of the present invention.

[0037] Fig.14 4 is a circuit diagram of a blower according to an embodiment of the present invention.

[0038] Fig.15 is a circuit diagram of a reference lamp according to an embodiment of the present invention.

[0039] Fig.16 4 is a circuit diagram of a voice module according to an embodiment of the present invention.

[0040] Fig.17 4 is a circuit diagram of a Hall switch according to an embodiment of the present invention.

[0041] Fig.18 It is a circuit diagram of a program debugging interface according to an embodiment of the present invention.

[0042] Fig.19 It is a circuit diagram of the type-c charging port of an embodiment of the present invention.

[0043] Fig. 20 is a circuit diagram of an angle sensor according to an embodiment of the present invention. DETAILED DESCRIPTION

[0044] 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.

[0045] In the embodiment 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.

[0046] 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.

[0047] Please refer to Figures 1 to 20 The targeted disinfection device of the embodiment of the present invention includes a shell 1.

[0048] An air inlet 2 and an ozone exhaust port 3 are provided on the shell 1. The air inlet 2 is in the shape of a grille. A blower 4 is provided in the shell 1, and an air outlet 5 of the blower 4 is directly opposite to the ozone exhaust port 3. In specific implementation, an air duct is provided in the shell 1, and the air duct connects the air inlet of the blower 4 and the air inlet 2. An ozone generating sheet 6 is provided at the outer side of the shell 1 corresponding to the air outlet 5. During operation, the ozone generated by the ozone generating sheet 6 is directed and concentratedly transported to the front of the air outlet 5 by the airflow generated by the blower 4, and then when the airflow reaches the preset recommended disinfection position of the targeted disinfection device, the speed decays to 0, and the ozone molecules are continuously transported by the airflow to the preset recommended disinfection position of the targeted disinfection device (i.e., the disinfection target of the targeted disinfection device, and the disinfection area at this position is the largest) for accumulation, so that the ozone concentration at this position reaches the preset disinfection concentration, which is convenient for users to disinfect items in this area. Compared with conventional fans (the wind of conventional fans is diffused, and ozone is also diffused, which cannot be concentrated for disinfection, and the diffusion will affect human health), the airflow generated by the blower 4 in the embodiment of the present invention is directional and concentrated, so that the ozone is directed and concentratedly transported to the preset targeted disinfection device recommended disinfection position for accumulation. In specific implementation, the air outlet 5 of the blower 4 can be designed to be a trumpet shape with a small angle opening.

[0049] An infrared distance measuring sensor 8 facing the ozone exhaust port 3 is provided in the housing 1, and a human body thermal sensor 9 is provided at one side of the housing 1 corresponding to the ozone exhaust port 3. The infrared distance measuring sensor 8 is used to detect the distance of the object in front of the ozone exhaust port 3. In specific implementation, the infrared distance measuring sensor 8 is preferably composed of an infrared transmitting tube and an infrared receiving tube, and a maximum sensing distance (i.e., a preset distance S) can be set. The human body thermal sensor 9 is arranged on the same side of the housing 1 as the ozone exhaust port 3, and is used to detect whether there is a human body in front of the ozone exhaust port 3, that is, to detect whether the ozone exhaust port 3 is facing the human body trunk or head. The embodiment of the present invention accurately determines the range of the object according to the set maximum sensing distance, and then determines the safe distance and the appropriate safety distance.

[0050] The housing 1 is provided with a control button 13, which is convenient for the user to manually control the on / off of the targeted disinfection device. The housing 1 integrates a processor, a high-voltage package 7, a battery, and a power management circuit. The processor is electrically connected to the high-voltage package 7, the power management circuit, the human body thermal sensor 9, the blower 4, the infrared ranging sensor 8 and the control button 13. The ozone generating sheet 6 is electrically connected to the high-voltage package 7, and the ozone generating sheet 6 and the high-voltage package 7 constitute an ozone generator. The battery is electrically connected to the power management circuit through a battery interface circuit. In specific implementation, the power management circuit consists of two parts: a charging circuit and a boost circuit.

[0051] After detecting that the user presses the control button 13, the processor controls the targeted disinfection device to start working, continuously detects whether there is a human body in front of the ozone exhaust port 3 in real time through the human body thermal sensor 9, and detects the distance between the targeted disinfection device and the object in front of the ozone exhaust port 3 through the infrared ranging sensor 8; when the human body is detected and the distance to the object is less than or equal to the preset distance S, the ozone generating sheet 6 and the blower 4 are controlled to stop working; when the human body is detected and there is no object in front of the ozone exhaust port 3 or the distance to the object is greater than the preset distance S, the ozone generating sheet 6 is controlled to work, and the air volume of the blower 4 is reduced by changing the duty cycle, and the blower 4 is controlled to discharge air at an air volume lower than F; when the human body is not detected, and there is no object in front of the ozone exhaust port 3 or the distance to the object is greater than the preset distance S, the ozone generating sheet 6 and the blower 4 are controlled to stop working; when the human body is not detected and the distance to the object is less than or equal to the preset distance S, the ozone generating sheet 6 is controlled to work, and the blower 4 is controlled to discharge air at a preset air volume F.

[0052] As an implementation method, the wind speed v of the air outlet 5 of the blower 4 is 初 Satisfy the following formula: L is the distance from the preset targeted disinfection device recommended disinfection position to the air outlet 5, and α is the velocity attenuation coefficient of the airflow in the air. When the airflow generated by the blower 4 carries ozone molecules from the air outlet 5 to the preset targeted disinfection device recommended disinfection position, the velocity decays to 0. Since the distance L is very short, the α value can be considered constant at room temperature.

[0053] As an implementation mode, the preset air volume F of the blower 4 and the ozone generation amount P of the ozone generating sheet 6 satisfy:

[0054] P is the ozone generation amount of the ozone generating sheet 6, in mg / s; F is the air output of the blower 4, in cm 3 / s; D is the volatility coefficient of ozone concentration over time at room temperature, Q is the preset disinfection concentration; t is the time it takes for the airflow discharged by the blower 4 to travel from the air outlet 5 to the recommended disinfection position, Since the t value is very small, the D value can be considered constant at room temperature.

[0055] It can be seen from the above formula that the wind speed at the air outlet 5 depends on the most effective distance L selected from the air outlet 5 to the sterilization target (i.e., the preset targeted disinfection device recommended disinfection position); and the ozone concentration near the sterilization target depends on the ozone generation of the inherent ozone generating sheet 6, the appropriate air volume and the wind speed at the air outlet 5. If the air volume is too small, the ozone output is insufficient, and if the air volume is too large, the ozone is blown away and the concentration decreases. Therefore, to control the optimal distance L, please refer to Figure 6 , Q is the actual concentration at the disinfection position recommended by the preset targeted disinfection device.

[0056] For example, L can be set in the range of 0 to 50 cm. Preferably, L is 20 cm. Then the wind speed v initial of the air outlet 5 of the blower 4 can be calculated. According to the wind speed v initial of the air outlet 5, the blower 4 can be a blower 4 with 3000 revolutions per minute. Then the ozone generation amount of the ozone generating sheet 6 can be selected as 50 mg per hour. The preset targeted disinfection device recommends that the ozone concentration at the disinfection position is 8 ppm. Please set the parameters. Figure 7 .

[0057] As an embodiment, a reference lamp 10 is further provided in the housing 1, facing the ozone exhaust port 3, the processor is electrically connected to the reference lamp 10, and the reference lamp 10 emits light in front of the ozone exhaust port 3. The light of the reference lamp 10 and the airflow generated by the blower 4 cross and overlap at the preset targeted disinfection device recommended disinfection position. The light of the reference lamp 10 forms a light spot at the preset targeted disinfection device recommended disinfection position, which is used to intuitively indicate the disinfection area for user convenience.

[0058] As an implementation mode, a voice module electrically connected to the processor is also integrated in the housing 1. The voice module is used for voice prompts, so that the user can understand the current working status of the targeted disinfection device through voice.

[0059] As an implementation mode, a charging line output interface 12 electrically connected to the power management circuit is also provided on the housing 1. The charging line output interface 12 includes three types: type-c, lightning, and Mini USB, which facilitates users to charge mobile devices through the targeted disinfection device.

[0060] As an embodiment, a thimble connector 11 is also provided on the housing 1. A thimble connector circuit for charging communication and electrically connected to the processor is integrated in the housing 1. The thimble connector 11 is connected to the thimble connector circuit. The thimble connector circuit facilitates the targeted disinfection device to connect to the charging base to realize the charging and sharing functions.

[0061] As an embodiment, the housing 1 is also integrated with a Hall switch electrically connected to the processor for detecting whether the device is in place. The Hall switch is convenient for detecting whether the targeted disinfection device is inserted into the charging base. When the Hall switch is close to the magnet on the charging base (the magnet is mounted on the buckle of the locking mechanism of the charging base), a signal will be generated.

[0062] As an implementation mode, a program debugging interface electrically connected to the processor is also integrated in the housing 1. The program debugging interface facilitates the user to debug the loaded software program.

[0063] As an implementation mode, a type-c charging port electrically connected to the processor is also integrated in the housing 1.

[0064] As an implementation method, an angle sensor electrically connected to the processor is also integrated in the housing 1. The angle sensor detects the inclination angle of the targeted disinfection device, that is, the angle between the ozone exhaust port and the horizontal plane. When the angle is greater than a preset angle, the targeted disinfection device does not work, preventing the targeted disinfection device from discharging ozone upward or to the side, so that ozone is only discharged when the ozone exhaust port is facing downward, thereby ensuring human health;.

[0065] The control method of the targeted disinfection device according to the embodiment of the present invention comprises:

[0066] Step 1: When the user presses the control button, the targeted disinfection device starts working, and continuously detects in real time whether there is a human body in front of the ozone exhaust port (i.e., whether it is facing the human torso or head) through the human body thermal sensor, and detects the distance between the targeted disinfection device and the object in front of the ozone exhaust port through the infrared ranging sensor; when a human body is detected, go to step 3; when no human body is detected, and there is no object in front of the ozone exhaust port or the distance to the object is greater than the preset distance S, go to step 3; when no human body is detected, and the distance to the object is less than or equal to the preset distance S, go to step 2;

[0067] Step 2: Control the ozone generating sheet to work, and control the blower to discharge air at a preset air volume F (at this time, the reference lamp 10 can also be turned on, and the light spot of the reference lamp 10 can be used to indicate the disinfection position and disinfection range to the user);

[0068] Step 3: Control the ozone generating sheet and the blower to stop working (at this time, you can also set a voice or flashing light to remind the user).

[0069] As an implementation mode, in step 1, when no human body is detected and the distance to the object is detected to be less than or equal to the preset distance S, the angle between the ozone exhaust port and the horizontal plane is detected. If the angle between the ozone exhaust port and the horizontal plane is detected to be greater than the preset angle (the preset angle can be set to 45°), step 3 is entered; if the angle between the ozone exhaust port and the horizontal plane is detected to be less than or equal to the preset angle, step 2 is entered.

[0070] As an implementation method, the air velocity v at the blower outlet is 初 Satisfy the following formula: L is the distance from the preset targeted disinfection device recommended disinfection position to the air outlet, and α is the velocity attenuation coefficient of the airflow in the air.

[0071] As an implementation method, the preset air volume F of the blower and the ozone generation amount P of the ozone generating sheet satisfy:

[0072] P is the ozone generation of the ozone generating sheet, in mg / s; F is the air volume of the blower, in cm 3 / s; D is the volatility coefficient of ozone concentration over time, Q is the preset disinfection concentration; t is the time it takes for the airflow discharged by the blower to travel from the air outlet to the recommended disinfection position,

[0073] 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 targeted disinfection device, characterized in that: It comprises a shell, an air inlet and an ozone exhaust port are provided on the shell, a blower is provided in the shell, and the air outlet of the blower is directly opposite to the ozone exhaust port; an ozone generating sheet is provided in the shell at the outer side corresponding to the air outlet; an infrared distance measuring sensor directly opposite to the ozone exhaust port is provided in the shell, and a human body thermal sensor is provided at one side corresponding to the ozone exhaust port in the shell; a control button is provided on the shell, and a processor, a high-voltage package, a battery, and a power management circuit are also integrated in the shell, the processor is electrically connected to the high-voltage package, the power management circuit, the human body thermal sensor, the blower, the infrared distance measuring sensor and the control button, the ozone generating sheet is electrically connected to the high-voltage package, and the battery is electrically connected to the power management circuit; Blower outlet wind speed v 初 Satisfy the following formula: ; L is the distance from the preset targeted disinfection device recommended disinfection position to the air outlet, and α is the velocity attenuation coefficient of the airflow in the air; The preset air volume F of the blower and the ozone generation volume P of the ozone generating sheet satisfy: ; P is the ozone generation of the ozone generator, in mg / s; F is the preset air volume of the blower, in cm 3 / s; D is the volatility coefficient of ozone concentration over time, Q is the preset disinfection concentration; t is the time it takes for the airflow discharged by the blower to travel from the air outlet to the recommended disinfection position, ; The shell is also provided with a charging line output interface electrically connected to the power management circuit.

2. The targeted disinfection device according to claim 1, characterized in that: A reference lamp facing the ozone exhaust port is also arranged in the shell, the processor is electrically connected to the reference lamp, and the reference lamp emits light in front of the ozone exhaust port.

3. The targeted disinfection device according to claim 1, characterized in that: A voice module electrically connected to the processor is also integrated in the shell.

4. The targeted disinfection device according to claim 1, characterized in that: The housing is also provided with a pin connector circuit used for charging communication and electrically connected to the processor.

5. The targeted disinfection device according to claim 1, characterized in that: An angle sensor electrically connected to the processor is also integrated in the housing.

6. A control method for a targeted disinfection device, characterized in that: include: Step 1: When the user presses the control button, the targeted disinfection device starts working, and continuously detects whether there is a human body in front of the ozone exhaust port in real time through the human body thermal sensor, and detects the distance between the targeted disinfection device and the object in front of the ozone exhaust port through the infrared ranging sensor; when a human body is detected, go to step 3; when no human body is detected, and there is no object in front of the ozone exhaust port or the distance to the object is greater than the preset distance S, go to step 3; when no human body is detected, and the distance to the object is less than or equal to the preset distance S, go to step 2; Step 2: Control the ozone generating sheet to work, and at the same time control the blower to discharge air at a preset air volume F; Step 3: Control the ozone generating sheet and the blower to stop working; Blower outlet wind speed v 初 Satisfy the following formula: ; L is the distance from the preset targeted disinfection device recommended disinfection position to the air outlet, and α is the velocity attenuation coefficient of the airflow in the air; The preset air volume F of the blower and the ozone generation volume P of the ozone generating sheet satisfy: ; P is the ozone generation of the ozone generator, in mg / s; F is the preset air volume of the blower, in cm 3 / s; D is the volatility coefficient of ozone concentration over time, Q is the preset disinfection concentration; t is the time it takes for the airflow discharged by the blower to travel from the air outlet to the recommended disinfection position, .

7. The control method of the targeted disinfection device according to claim 6, characterized in that: In step 1, when no human body is detected and the distance to the object is detected to be less than or equal to the preset distance S, the angle between the ozone exhaust port and the horizontal plane is detected. If the angle between the ozone exhaust port and the horizontal plane is detected to be greater than the preset angle, step 3 is entered; if the angle between the ozone exhaust port and the horizontal plane is detected to be less than or equal to the preset angle, step 2 is entered.

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