UV-LED sterilization device and detection circuit thereof

Abstract

The present invention discloses a UV-LED sterilization device and its detection circuit and control method. The detection circuit includes an MCU and a high-side switch; the high-side switch is electrically connected to the UV-LED lamp group and the MCU respectively; the high-side switch is used to extinguish the lamp group when closed and to light the lamp group when opened; the MCU is used to detect the input voltage parameters and operating current parameters of the lamp group, and send a first signal to the high-side switch to turn off the high-side switch based on the detection results. The UV-LED sterilization device and its detection circuit and control method of the present invention detect the input voltage parameters and operating current parameters of the lamp group, and control the high-side switch to cut off the lamp group when an abnormal state is found; and by performing comprehensive detection of the fan module, the operating temperature of the device, etc., it can ensure precise control of the overall working state of the sterilization device, ensure that the sterilization operation is carried out safely and stably, and avoid equipment damage or even corresponding accidents.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to a UV-LED sterilization device and a detection circuit and a control method thereof. Background Art

[0002] UV-LED (Ultraviolet light-emitting diode) sterilization devices are widely used in liquid sterilization pretreatment applications and play an important role. UV-LED sterilization devices have high operating precision and special requirements for internal and external environments. If a malfunction occurs, not only will the sterilization effect be lost, but it may also cause damage to the equipment and personnel. Therefore, it is necessary to conduct precise testing of the working status of UV-LED sterilization devices. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the defects of the prior art in that the working state detection mode of the UV-LED sterilization device is single and the precision is not high enough, and to provide a UV-LED sterilization device and its detection circuit and control method.

[0004] The present invention solves the above technical problems through the following technical solutions:

[0005] The present invention provides a detection circuit for a UV-LED sterilization device, wherein the detection circuit includes an MCU (Microcontroller Unit) and a high-side switch;

[0006] The high-side switch is electrically connected to the UV-LED lamp group of the UV-LED sterilization device and the MCU respectively;

[0007] The high-side switch is used to extinguish the UV-LED lamp group when it is turned off, and to light up the UV-LED lamp group when it is turned on;

[0008] The MCU is used to detect the input voltage parameters and operating current parameters of the UV-LED lamp group, and send a first signal to the high-side switch according to the detection result, where the first signal is used to turn off the high-side switch.

[0009] Preferably, the detection circuit further includes a Hall sensor;

[0010] The Hall sensor is electrically connected to the MCU;

[0011] The Hall sensor is used to read the opening and closing state parameters of the box cover of the UV-LED sterilization device and send the opening and closing state parameters to the MCU; the opening and closing state parameters are used to indicate whether the box cover is open or closed;

[0012] The MCU is configured to send a second signal to the high-side switch when detecting that the opening and closing state parameter indicates that the box cover is in an open state, wherein the second signal is configured to turn off the high-side switch.

[0013] Preferably, the detection circuit further includes a fan module;

[0014] The MCU is electrically connected to the fan module;

[0015] The MCU is used to send a third signal to the high-side switch when reading an abnormal feedback parameter of the fan module, and the third signal is used to turn off the high-side switch; wherein the abnormal feedback parameter is used to indicate that the fan module is in an abnormal working state.

[0016] Preferably, the detection circuit further includes a temperature sensor;

[0017] The temperature sensor is electrically connected to the MCU;

[0018] The temperature sensor is used to read the real-time temperature parameters of the cavity of the UV-LED sterilization device and send the real-time temperature parameters to the MCU;

[0019] The MCU is configured to send a fourth signal to the fan module when detecting that the real-time temperature parameter exceeds a temperature threshold, wherein the fourth signal is configured to turn on the fan module.

[0020] Preferably, the detection circuit further includes an alarm module;

[0021] The alarm module is electrically connected to the MCU;

[0022] The MCU is further configured to send a fifth signal to the alarm module, and the fifth signal is configured to enable the alarm module to emit an audible and visual alarm message.

[0023] Preferably, the alarm module includes an LED alarm light group and a buzzer.

[0024] Preferably, the UV-LED lamp group includes at least two UV-LED lamps; the high-side switch is electrically connected to each of the UV-LED lamps through a pin header;

[0025] and / or,

[0026] The high side switch is a BTS4130QGA chip.

[0027] The present invention also provides a UV-LED sterilization device, comprising the above-mentioned detection circuit.

[0028] Preferably, the UV-LED sterilization device further includes a power module.

[0029] A control method, characterized in that it is used to control the above-mentioned UV-LED sterilization device; the control method comprises:

[0030] Detecting the working status of the UV-LED sterilization device;

[0031] If the working state is a fault state, turning off the UV-LED lamp group of the UV-LED sterilization device;

[0032] If the working state is the irradiation state, then within the preset irradiation time, the box cover of the UV-LED sterilization device, the voltage and current of the UV-LED sterilization device, and the cavity temperature of the UV-LED sterilization device are detected, and the UV-LED lamp group is turned off when an abnormality is detected;

[0033] If the working state is an idle state, when it is detected that the switch corresponding to the UV-LED lamp group is turned on, the UV-LED lamp group is turned on.

[0034] The positive progressive effects of the present invention are as follows: the UV-LED sterilization device and its detection circuit and control method of the present invention detect the input voltage parameters and operating current parameters of the UV-LED lamp group, and control the high-side switch to cut off the UV-LED lamp group when an abnormal state is found; and through comprehensive detection of the fan module, the operating temperature of the device, etc., it can ensure precise control of the overall working state of the sterilization device, ensure that the sterilization operation is carried out safely and stably, and avoid equipment damage or even corresponding accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a module schematic diagram of the detection circuit of the UV-LED sterilization device according to Example 1 of the present invention.

[0036] Figure 2 This is a schematic diagram of the modules of the UV-LED sterilization device according to Example 2 of the present invention.

[0037] Figure 3 This is a flow chart of the control method of embodiment 3 of the present invention. DETAILED DESCRIPTION

[0038] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0039] Example 1

[0040] See also Figure 1As shown, this embodiment specifically provides a detection circuit of a UV-LED sterilization device, which includes an MCU1 and a high-side switch 2; the high-side switch 2 is electrically connected to the UV-LED lamp group 3 of the UV-LED sterilization device and the MCU1 respectively.

[0041] The high-side switch 2 is used to extinguish the UV-LED lamp group 3 when it is turned off, and to light up the UV-LED lamp group 3 when it is turned on; the MCU1 is used to detect the input voltage parameters and operating current parameters of the UV-LED lamp group 3, and send a first signal to the high-side switch 2 based on the detection results, and the first signal is used to turn off the high-side switch 2.

[0042] In this embodiment, MCU1 detects the system input voltage and operating current of the sterilization device to control the UV-LED lamp group 3 through the high-side switch 2; the high-side switch 2 can adopt the BTS4130QGA chip. It can be understood that the UV-LED lamp group 3 includes at least two UV-LED lamps; the high-side switch 2 is electrically connected to each UV-LED lamp through a pin header, so that it can be individually controlled according to the instructions of MCU1, including switching and opening duration.

[0043] Specifically, the operating status of the sterilizer's UV-LED lamp group 3 can be determined based on a current / voltage reference parameter table. This involves comparing the MCU1's detection results of the UV-LED lamp group 3's input voltage and operating current parameters with the table to confirm whether the device is operating normally. For example, to monitor how the UV-LED lamp group 3's operating current changes with input voltage, the current values ​​corresponding to 12V and 12.6V are calibrated. The test results can then be used to determine whether the current follows a correct linear trend when the input voltage is between 12V and 12.6V, thereby making current detection more accurate.

[0044] In a preferred embodiment, the detection circuit further includes a Hall sensor 4; the Hall sensor 4 is electrically connected to the MCU1; the Hall sensor 4 is used to read the opening and closing state parameters of the UV-LED sterilization device's lid and transmit the opening and closing state parameters to the MCU1; the opening and closing state parameters are used to indicate whether the lid is open or closed; and the MCU1 is used to transmit a second signal to the high-side switch 2 upon detecting that the opening and closing state parameters indicate that the lid is open, the second signal being used to turn off the high-side switch 2. In this embodiment, the Hall sensor 4 serves as a switch detection device. It is understood that, in addition to the main Hall sensor 4 component disposed in the circuit, it also includes a magnet component disposed on the lid. Therefore, when it detects that the lid is opened during sterilization operation, the opening and closing state parameters are transmitted to the MCU1, indicating that the lid has been abnormally opened. Based on the opening and closing state parameters, the MCU1 promptly cuts off the operating current of the UV-LED lamp assembly 3, terminating the irradiation process to prevent insufficient light intensity within the lamp cavity from invalidating the experiment or even causing personal injury due to ultraviolet rays.

[0045] As a preferred embodiment, the detection circuit also includes a fan module 5; the MCU1 is electrically connected to the fan module 5 of the UV-LED sterilization device; upon reading an abnormal feedback parameter of the fan module 5, the MCU1 is configured to send a third signal to the high-side switch 2, which is used to turn off the high-side switch 2; wherein the abnormal feedback parameter is used to indicate that the fan module 5 is in an abnormal operating state. Preferably, the detection circuit also includes a temperature sensor 6; the temperature sensor 6 is electrically connected to the MCU1; the temperature sensor 6 is configured to read the real-time temperature parameter of the UV-LED sterilization device cavity and transmit the real-time temperature parameter to the MCU1; upon detecting that the real-time temperature parameter exceeds a temperature threshold, the MCU1 is configured to send a fourth signal to the fan module 5, which is used to turn on the fan module 5.

[0046] This embodiment can be implemented by providing a fan module signal input connector with a controllable switch. This allows for abnormal feedback parameters from the fan module 5 to be obtained and the UV-LED lamp assembly 3 to be turned off. Furthermore, the device's real-time temperature is monitored during operation, and when it exceeds a threshold, the fan module 5 is turned on to reduce the temperature. Furthermore, if the device's real-time operating temperature exceeds the allowable operating temperature limit, sterilization is halted and an alarm is issued.

[0047] As a preferred embodiment, the detection circuit further includes an alarm module 7; the alarm module 7 is electrically connected to the MCU1; and the MCU1 is further configured to send a fifth signal to the alarm module 7, which is configured to cause the alarm module 7 to emit an audible and visual alarm. Preferably, the alarm module 7 includes an LED alarm light assembly and a buzzer. It will be understood that the buzzer is configured to emit an audible alarm, and the LED alarm light assembly is configured to emit a warning light. Different combinations of the warning light or buzzer can indicate corresponding circuit faults.

[0048] The detection circuit of the UV-LED sterilization device of this embodiment can control the high-side switch to cut off the UV-LED lamp group when an abnormal state is detected; and through comprehensive detection of the fan module, the operating temperature of the device, etc., it ensures precise control of the overall working state of the sterilization device, ensures that the sterilization operation is carried out safely and stably, and avoids equipment damage or even corresponding accidents.

[0049] Example 2

[0050] See also Figure 2 As shown, the present invention also provides a UV-LED sterilization device including the detection circuit in Example 1. As a preferred embodiment, the UV-LED sterilization device also includes a power module 8. Specifically, the specific settings of the power module 8 can be adjusted according to the application environment. In one embodiment, an external adapter is used for power supply, and the power is not less than 45W. Elements such as AC to DC, DC transformer and linear voltage stabilization are provided to ensure stable power supply to various components such as the UV-LED lamp group 3, wherein the UV-LED lamp group 3 is designed to have a constant and calibrated current, and the voltage range can be set to 12V~12.6V. Optionally, when an abnormality occurs, the power module 8 can also trigger the alarm module 7 to issue a corresponding alarm.

[0051] The UV-LED sterilization device of this embodiment can control the high-side switch to cut off the UV-LED lamp group when an abnormal state is detected; and through comprehensive detection of the fan module, the operating temperature of the device, etc., it ensures precise control of the overall working state of the sterilization device, ensures that the sterilization operation is carried out safely and stably, and avoids equipment damage or even corresponding accidents.

[0052] Example 3

[0053] See also Figure 3 As shown, this embodiment specifically provides a control method for controlling the UV-LED sterilization device in Example 2; the control method includes the following steps:

[0054] S1. Detect the working state of the UV-LED sterilization device; if the working state is a fault state, execute step S2; if the working state is an irradiation state, execute step S3; if the working state is an idle state, execute step S4.

[0055] S2. Turn off the UV-LED lamp group;

[0056] S3. Detect the UV-LED sterilizer's lid, voltage and current, and chamber temperature within the preset exposure time, and shut down the UV-LED lamp assembly if any abnormality is detected.

[0057] S4. When it is detected that the switch of the UV-LED lamp group is turned on, turn on the UV-LED lamp group.

[0058] Before entering the working state, the UV-LED sterilization device is initialized, and the initialization items include but are not limited to reading configuration parameters, turning off the UV-LED lamp group, turning off the fan module, and initializing the parameters. After the system is initialized, when the UV-LED sterilization device performs a self-test, the detection items include but are not limited to the EEPROM (Electrically Erasable Programmable read only memory) reading status, the Hall sensor feedback (box cover closed) status, the fan module feedback (off) status, the UV-LED lamp group switch (off) status, the UV-LED lamp group current reading status, the temperature sensor status, etc. If the working state is a fault state, as long as it is detected that the box cover is opened, the fault state is switched to the idle state; if the working state is an idle state, before executing step S4, it can be pre-detected whether the box cover of the UV-LED sterilization device is opened. If it is opened, the corresponding operation of the fault state is executed. If it is not opened, step S4 is executed.

[0059] In addition, for abnormal results indicating faults in various tests, corresponding fault codes can be automatically generated and sent to the state machine used to store the working status for subsequent control logic to read and process. The processing results of each process can be indicated or alarmed by a three-color LED light.

[0060] The control method of this embodiment detects the input voltage parameters and operating current parameters of the UV-LED lamp group, and controls the high-side switch to cut off the UV-LED lamp group when an abnormal state is found; and through comprehensive detection of the fan module, the operating temperature of the device, etc., it can ensure precise control of the overall working state of the sterilization device, ensure that the sterilization operation is carried out safely and stably, and avoid equipment damage or even corresponding accidents.

[0061] Although specific embodiments of the present invention have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications are intended to fall within the scope of the present invention.

Claims

1. A detection circuit for a UV-LED sterilization device, characterized in that: The detection circuit includes an MCU and a high-side switch; The high-side switch is electrically connected to the UV-LED lamp group of the UV-LED sterilization device and the MCU respectively; The high-side switch is used to extinguish the UV-LED lamp group when it is turned off, and to light up the UV-LED lamp group when it is turned on; The MCU is used to detect the input voltage parameter and the operating current parameter of the UV-LED lamp group, and send a first signal to the high-side switch according to the detection result, wherein the first signal is used to turn off the high-side switch; The detection circuit also includes a fan module; The MCU is electrically connected to the fan module; The MCU is configured to send a third signal to the high-side switch when an abnormal feedback parameter of the fan module is read, wherein the third signal is configured to turn off the high-side switch; wherein the abnormal feedback parameter is configured to indicate that the fan module is in an abnormal operating state; The detection circuit also includes a Hall sensor; The Hall sensor is electrically connected to the MCU; The Hall sensor is used to read the opening and closing state parameters of the box cover of the UV-LED sterilization device and send the opening and closing state parameters to the MCU; the opening and closing state parameters are used to indicate whether the box cover is open or closed; The MCU is configured to send a second signal to the high-side switch when detecting that the opening and closing state parameter indicates that the box cover is in an open state, wherein the second signal is configured to turn off the high-side switch; The detection circuit also includes a temperature sensor; The temperature sensor is electrically connected to the MCU; The temperature sensor is used to read the real-time temperature parameters of the cavity of the UV-LED sterilization device and send the real-time temperature parameters to the MCU; The MCU is used to send a fourth signal to the fan module when it detects that the real-time temperature parameter exceeds the temperature threshold, and the fourth signal is used to turn on the fan module; when it detects that the real-time temperature parameter exceeds the operating temperature limit, it stops the sterilization state and initiates an alarm.

2. The detection circuit of the UV-LED sterilization device according to claim 1, characterized in that: The detection circuit also includes an alarm module; The alarm module is electrically connected to the MCU; The MCU is further configured to send a fifth signal to the alarm module, and the fifth signal is configured to enable the alarm module to emit an audible and visual alarm message.

3. The detection circuit of the UV-LED sterilization device according to claim 2, characterized in that: The alarm module includes an LED alarm light group and a buzzer.

4. The detection circuit of the UV-LED sterilization device according to claim 1, characterized in that: The UV-LED lamp group includes at least two UV-LED lamps; the high-side switch is electrically connected to each of the UV-LED lamps through a pin header; and / or, The high side switch is a BTS4130QGA chip.

5. A UV-LED sterilization device, characterized in that: The method comprises the detection circuit according to any one of claims 1 to 4.

6. The UV-LED sterilization device according to claim 5, characterized in that: The UV-LED sterilization device also includes a power supply module.

7. A control method, characterized in that: Used to control the UV-LED sterilization device as described in claim 5 or 6; the control method includes: Detecting the working status of the UV-LED sterilization device; If the working state is a fault state, turning off the UV-LED lamp group of the UV-LED sterilization device; If the working state is the irradiation state, then within the preset irradiation time, the box cover of the UV-LED sterilization device, the voltage and current of the UV-LED sterilization device, and the cavity temperature of the UV-LED sterilization device are detected, and the UV-LED lamp group is turned off when an abnormality is detected; If the working state is an idle state, when it is detected that the switch corresponding to the UV-LED lamp group is turned on, the UV-LED lamp group is turned on.

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