A UV automatic sterilization and disinfection hand washing machine control circuit
Patent Information
- Application Number
- CN202521411179.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-07
- Publication Date
- 2026-08-18
- Estimated Expiration
- 2035-07-07
AI Technical Summary
[0003]现有技术普遍采用密封储液罐结合单向阀的设计来避免外部污染，但对储液罐内部滋生的微生物缺乏有效处理手段，已有研究表明，洗手液在储液罐内存放超过72小时后，绿脓杆菌等致病菌检出率可达23%（参照《医院感染学杂志》2023年数据），传统物理密封无法解决液体初始污染及使用过程中的二次污染，现有带UV消毒的洗手机采用定时照射方式，存在以下缺陷：
[0018]将洗手机中对洗手液的消毒作用与出液作用结合，相较于常规的仅通过紫外线对洗手液储存部位的表面照射灭菌，直接将照射灭菌作用直接作用于洗手液的输出路径上，有效避免了在照射消毒时，光照受洗手液储存空间大小的局限，即对洗手液的消毒处理可以做到均匀彻底，杜绝消毒死角产生。
Smart Images
Figure CN224651781U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hand sanitizer control technology, specifically to a hand sanitizer control circuit for automatic UV sterilization and disinfection. Background Technology
[0002] Hand sanitizer dispensers are now available on the market that can sense when a hand is near and automatically dispense hand sanitizer to assist in handwashing, making it convenient for users to wash their hands and providing a good user experience. Currently, the automatic hand sanitizer dispensers widely used in public places mainly control the quantitative output of hand sanitizer through infrared sensing, and their core functions are concentrated in the liquid pumping mechanism and sensing control circuit.
[0003] Current technologies generally employ a sealed liquid storage tank combined with a one-way valve design to prevent external contamination. However, there is a lack of effective means to treat the microorganisms that grow inside the storage tank. Studies have shown that after hand sanitizer has been stored in the storage tank for more than 72 hours, the detection rate of pathogenic bacteria such as Pseudomonas aeruginosa can reach 23% (referencing data from the *Journal of Hospital Infection*, 2023). Traditional physical sealing cannot solve the problem of initial liquid contamination and secondary contamination during use. Existing hand sanitizers with UV disinfection use a timed irradiation method, which has the following drawbacks:
[0004] 1. Disinfection and liquid dispensing are separated; ultraviolet light only sterilizes the surface of the storage tank.
[0005] Second, fixed-power UV irradiation cannot be adapted to the effective bactericidal dose at different flow rates (according to GB 28235-2020 standard, the irradiation dose of flowing liquids must reach 40mJ / cm² or higher).
[0006] The aforementioned defects make it difficult to effectively treat the microorganisms mixed in with the hand sanitizer during dispensing, thus requiring corresponding improvements. Utility Model Content
[0007] In order to overcome the above-mentioned technical problems, the purpose of this utility model is to provide a UV automatic sterilization and disinfection hand sanitizer control circuit.
[0008] The objective of this utility model can be achieved through the following technical solutions:
[0009] A UV automatic sterilization and disinfection hand sanitizer control circuit includes a central control module, a switch module, a power supply module, a liquid dispensing module, a UV irradiation module, a proximity detection module, and a status indication module.
[0010] The power supply module outputs voltage to power the central control module, UV irradiation module, proximity detection module and status indication module.
[0011] One end of the central control module is connected to a switch module, and the other end is connected to a liquid dispensing module and a boost circuit. The boost circuit outputs a voltage to power the liquid dispensing module. The central control module controls the change in the hand sanitizer supply speed of the liquid dispensing module through a drive circuit.
[0012] The UV irradiation module outputs ultraviolet light, which acts on the hand sanitizer supply path of the liquid dispensing module. The light intensity provided by the UV irradiation module matches the hand sanitizer supply speed of the liquid dispensing module.
[0013] As a further embodiment of this utility model: the power supply module is connected to an LDO circuit, the LDO circuit outputs a voltage of 1, and the power supply module supplies power to the central control module, UV irradiation module, proximity detection module and status indication module through the LDO circuit.
[0014] As a further embodiment of this utility model: the central control module is connected to a proximity detection module, which detects the proximity of the user's hand and sends distance detection data to the central control module.
[0015] As a further embodiment of this utility model: the central control module is connected to a status indicator module, the status indicator module includes a red-green light group, the central control module switches the light of the red-green light group according to the opening status of the liquid dispensing module, when the liquid dispensing module is open, the central control module controls the status indicator module to emit green light, and when the liquid dispensing module is closed, the central control module controls the status indicator module to emit red light.
[0016] As a further embodiment of this utility model: the UV irradiation module includes an ultraviolet lamp group and a light intensity detection sensor. The light intensity detection sensor detects the intensity of ultraviolet light generated by the ultraviolet lamp group in real time and sends the detection data to the central control module. The central control module controls the hand sanitizer supply speed of the liquid dispensing module according to the light intensity data.
[0017] The beneficial effects of this utility model are:
[0018] By combining the disinfection and dispensing functions of hand sanitizer in a hand sanitizer dispenser, compared to the conventional method of sterilizing only the surface of the hand sanitizer storage area by ultraviolet light, the disinfection effect is directly applied to the dispensing path of the hand sanitizer. This effectively avoids the limitation of light exposure due to the size of the hand sanitizer storage space during irradiation disinfection, ensuring uniform and thorough disinfection and eliminating any blind spots in the disinfection process.
[0019] It also introduces a mechanism that couples and matches the hand sanitizer output speed with the light intensity, so that the light intensity is adapted to the flow rate of the hand sanitizer, further increasing the completeness of hand sanitizer disinfection. Attached Figure Description
[0020] The present invention will be further described below with reference to the accompanying drawings.
[0021] Figure 1 This is a schematic diagram showing the relationship between the modules in this utility model.
[0022] In the diagram: 1. Central control module; 2. Switch module; 3. Power supply module; 4. Liquid dispensing module; 5. UV irradiation module; 501. Ultraviolet lamp assembly; 502. Light intensity detection sensor; 6. Proximity detection module; 7. Status indication module; 10. LDO circuit; 20. Boost circuit; 30. Drive circuit. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0024] This application provides a technical solution, which is referenced in the embodiments. Figure 1 The module connection relationship shown is a UV automatic sterilization and disinfection hand sanitizer control circuit, including a central control module, a switch module, a power supply module, a liquid dispensing module, a UV irradiation module, a proximity detection module, and a status indication module.
[0025] The power supply module outputs voltage to power the central control module, UV irradiation module, proximity detection module and status indication module.
[0026] One end of the central control module is connected to a switch module, and the other end is connected to a liquid dispensing module and a boost circuit. The boost circuit outputs a voltage to power the liquid dispensing module. The central control module controls the change in the hand sanitizer supply speed of the liquid dispensing module through a drive circuit.
[0027] The UV irradiation module outputs ultraviolet light, which acts on the hand sanitizer supply path of the liquid dispensing module. The light intensity provided by the UV irradiation module matches the hand sanitizer supply speed of the liquid dispensing module.
[0028] The specific implementation of the coupled output of hand sanitizer and UV automatic sterilization in this application is as follows:
[0029] The switch module is used to control the opening and closing of the central control module. Under normal use, the switch module is open, activating the entire hand sanitizer control circuit. When the proximity detection module detects the user's hand approaching, it sends distance detection data to the central control module. The central control module then controls the dispensing module to output hand sanitizer and simultaneously drives the UV irradiation module to start, generating ultraviolet light along the path of the hand sanitizer output. The UV irradiation module includes an ultraviolet lamp group and a light intensity detection sensor. The light intensity detection sensor detects the intensity of the ultraviolet light generated by the ultraviolet lamp group in real time and sends the detection data to the central control module. The central control module controls the hand sanitizer supply speed of the dispensing module according to the light intensity data.
[0030] Through the above implementation, the disinfection effect of hand sanitizer in the hand sanitizer dispenser is combined with the dispensing effect. Compared with the conventional method of sterilizing only the surface of the hand sanitizer storage area by ultraviolet light, this application directly applies the irradiation sterilization effect to the dispensing path of the hand sanitizer. This effectively avoids the limitation of light intensity caused by the size of the hand sanitizer storage space during irradiation disinfection (the light intensity received by the inner hand sanitizer is lower due to the obstruction of the outer hand sanitizer). In other words, the disinfection treatment of hand sanitizer can be uniform and thorough, eliminating the generation of disinfection dead corners.
[0031] In order to achieve the above-mentioned effects, this application also introduces a mechanism that couples and matches the hand sanitizer output speed with the light intensity, so that the light intensity is adapted to the flow rate of the hand sanitizer, thereby further increasing the completeness of hand sanitizer disinfection.
[0032] In addition, the power supply module is connected to the LDO circuit, and the LDO circuit outputs a voltage of 1. The power supply module supplies power to the central control module, UV irradiation module, proximity detection module and status indication module through the LDO circuit.
[0033] The central control module is connected to a status indicator module, which includes a red-green light group. The central control module switches the light of the red-green light group according to the on / off status of the liquid dispensing module. When the liquid dispensing module is on, the central control module controls the status indicator module to emit green light, and when the liquid dispensing module is off, the central control module controls the status indicator module to emit red light.
[0034] In practical use, a UV automatic sterilization and disinfection hand sanitizer control circuit is assembled from the following components:
[0035] Figure Labels Component Name Acquisition methods illustrate 1 Central control module √Purchased □Made Select an MCU with the following specifications: CPU architecture: ARM Cortex-M; bit width: 32-bit; clock frequency: 50MHz~200MHz; storage capacity: 64KB~512KB; RAM: 4KB~512KB; 2 Switch module √Purchased □Made Select a digital DIP switch compatible with the above MCU. 3 Power supply module √Purchased □Made Select a secondary lithium-ion battery with a nominal voltage of 3.6V. 4 Liquid dispensing module √Purchased □Made Choose the hand sanitizer dispenser pump and nozzle. 501 UV lamp assembly √Purchased □Made Select a UV light-emitting diode with a wavelength of 200–280 nm and a light intensity modulation method of current regulation. 502 Light intensity detection sensor √Purchased □Made Select a UV light intensity sensor model GUVA-S12SD with a wavelength range of 200–400nm. 6 Proximity detection module √Purchased □Made Select the low-power infrared ranging module, model WTU201F2 B004. 7 Status indicator module √Purchased □Made Choose an LED light strip that can switch between red and green light.
[0036] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.
Claims
1. A UV automatic sterilization and disinfection hand sanitizer control circuit, characterized in that, It includes a central control module (1), a switch module (2), a power supply module (3), a liquid dispensing module (4), a UV irradiation module (5), a proximity detection module (6), and a status indication module (7). The power supply module (3) outputs voltage to supply power to the central control module (1), UV irradiation module (5), proximity detection module (6) and status indication module (7); The central control module (1) is connected to a switch module (2) at one end and to a liquid dispensing module (4) and a boost circuit (20) at the other end. The boost circuit (20) outputs a voltage to supply power to the liquid dispensing module (4). The central control module (1) controls the change in the hand sanitizer supply speed of the liquid dispensing module (4) by connecting to the drive circuit (30). The UV irradiation module (5) outputs ultraviolet light, which acts on the hand sanitizer supply path of the liquid dispensing module (4). The light intensity provided by the UV irradiation module (5) matches the hand sanitizer supply speed of the liquid dispensing module (4).
2. The UV automatic sterilization and disinfection hand sanitizer control circuit according to claim 1, characterized in that, The power supply module (3) is connected to the LDO circuit (10). The LDO circuit (10) outputs a voltage of 1. The power supply module (3) supplies power to the central control module (1), UV irradiation module (5), proximity detection module (6) and status indication module (7) through the LDO circuit (10).
3. The UV automatic sterilization and disinfection hand sanitizer control circuit according to claim 1, characterized in that, The central control module (1) is connected to a proximity detection module (6), which detects the proximity of the user's hand and sends distance detection data to the central control module (1).
4. The UV automatic sterilization and disinfection hand sanitizer control circuit according to claim 1, characterized in that, The central control module (1) is connected to a status indicator module (7), which includes a red-green light group. The central control module (1) switches the light output of the red-green light group according to the opening status of the liquid dispensing module (4). When the liquid dispensing module (4) is open, the central control module (1) controls the status indicator module (7) to emit green light, and when the liquid dispensing module (4) is closed, the central control module (1) controls the status indicator module (7) to emit red light.
5. The UV automatic sterilization and disinfection hand sanitizer control circuit according to claim 1, characterized in that, The UV irradiation module (5) includes an ultraviolet lamp group (501) and a light intensity detection sensor (502). The light intensity detection sensor (502) detects the intensity of ultraviolet light generated by the ultraviolet lamp group (501) in real time and sends the detection data to the central control module (1). The central control module (1) controls the hand sanitizer supply speed of the liquid dispensing module (4) according to the light intensity data.