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Water dispenser solution
A water dispenser is a device that heats or cools bottled water (distilled water, pure water, mineral water, etc.) or domestic water that has been treated by a purification device, or provides the human body with drinking water at the original water temperature. With the continuous development and innovation of water dispenser technology, high-end water dispensers have added functions such as antibacterial, ozone disinfection, and fluorine-free refrigeration on the basis of traditional water dispensers.
1. The working principle of the water dispenser solution
Heating principle: The heating system is divided into internal heat and external heat. The internal heating type is to directly act on the water in the hot tank through the stainless steel electric heating tube to heat the water; the external heating type is to heat the outside of the hot tank through the heating coil, and the outside is covered with an insulation layer to reduce heat loss. In contrast, internal heating has high thermal efficiency and low power consumption, but the surface of the heating layer is prone to scaling and is not easy to clean; external heating has a large amount of heat loss and high noise, but has less scaling and less damage to the heating element.
Refrigeration principle: Refrigeration is divided into compressor refrigeration and electronic refrigeration.
(1) Compressor refrigeration: When the compressor refrigerates, it uses the working principle of refrigerant absorption and condensation to release heat for refrigeration, which is divided into two methods: external refrigeration and internal refrigeration. The compressor refrigeration system is mainly composed of 5 main components such as compressor, condenser, filter, capillary tube and evaporator connected by pipelines, and it is a closed system. The system is filled with refrigerant, which is generally R12 (fluorine-containing) or R134a (fluorine-free).
(2) Electronic refrigeration: Electronic refrigeration mainly achieves the purpose of refrigeration through electronic refrigeration chips. The electronic cooling chip is composed of two ceramic substrates with 127 pairs of semiconductor crystal grains in the middle. During work, the ceramic substrate on one side generates heat release and the other side absorbs heat. The heat-absorbing end is connected to the cooling rod in the cold tank to achieve the purpose of cooling; the heat-releasing end is connected to the heat sink, and the heat is taken away by the fan.
Antibacterial principle: Antibacterial agents are mainly realized with a formula that prevents microbial degradation. This formula is an additive that has the biological function of exempting pathogenic microorganisms. The antibacterial agent is composed of positively charged groups, which neutralize the negatively charged bacteria, rupture the bacterial cell wall, overflow the cytoplasm, cause the death of the bacteria, and achieve the purpose of sterilization.
Ozone disinfection principle: Ozone is an unstable gas, soluble in water but not high in solubility, and is a strong oxidant and disinfectant. If the disinfection switch of the water dispenser is turned on, the disinfection parts will generate ozone gas through the ozone generator and diffuse into the disinfection cabinet. When ozone reaches a certain concentration, it can kill microorganisms in a short time and inhibit bacterial regrowth. The principle of purple light antivirus: purple light antivirus technology has been used in water disinfection for more than 100 years, and the disinfection efficiency is very high, and it is also an environmental protection technology. The first Ziguang water dispenser in China was born in Qidi Group in January 2004, bringing a technological breakthrough in "anti-secondary pollution" of water dispensers.
The principle of purple light disinfection: it uses the specially designed high-efficiency, high-intensity and long-life C-band ultraviolet generator to irradiate water or air with strong ultraviolet rays to achieve disinfection. It can make various pathogenic cell tissues in water or air The DNA structure is damaged and loses its activity, so as to achieve the purpose of sterilization. Compared with the traditional chlorine dioxide method, ozone method, and membrane filtration method, the advantages of ultraviolet disinfection technology are: no chemical substances are added, no toxic substances are produced or left in the water, and the operation is safe.
2. Design idea of new water dispenser scheme
There are many problems in traditional drinking fountains, including potential safety hazards, health, energy saving and other issues. When the water dispenser runs dry without water, it may burn out the water dispenser, or cause a fire in severe cases; children curiously press the water button to play and cause burns; the water in the hot water tank is heated repeatedly to form thousands of boiling water, which is harmful to the human body. Harm: After the water dispenser is heated, if people forget to cut off the power supply, it will always be in a state of power consumption, resulting in energy waste. In addition, there are also problems such as long heating waiting time and manual operation of power switch and water outlet switch. Starting from safety, health, energy saving, convenience, humanity and ease of use, design a fully functional instant hot water dispenser.
A pyroelectric infrared sensor is installed on the water dispenser to automatically detect whether someone is approaching the water dispenser. The photosensitive sensor detects whether it is day or night, so as to determine whether to open the welcome voice; Thousands of boiling water, users do not need to wait, use two solenoid valves to control the cold and hot water outlets; the temperature sensor monitors the water temperature, if the temperature is abnormal, it will automatically cut off the power; the liquid level sensor detects whether the water level is sufficient, if the water level is insufficient, it will automatically Alarm; the obstacle detection module detects whether there is a water cup placed in the water outlet. If the water cup is detected and the water level meets the requirements, the lighting will be turned on, the heating tube will be heated, and hot water will be released.
The functional requirements of this water dispenser are instant heating, health, safety, energy saving, and voice prompts. According to the design function, the modular design method is used, and the 51 single-chip microcomputer is used to control, realizing the intelligentization of the water dispenser.
3. Water dispenser hardware design
The water dispenser control system is mainly designed with single-chip microcomputer as the core, including CPU, infrared pyroelectric sensor, liquid level sensor, solenoid valve, photosensitive sensor, voice module, temperature sensor and other parts.
1) Human body detection, start the power supply. An infrared pyroelectric sensor is installed on the water dispenser as a human body detection module. When a person approaches the water dispenser, the human body detection module sends a signal to the single-chip microcomputer, and the single-chip microcomputer is connected to the working power. The photosensitive sensor module detects whether it is daytime, if it is daytime, the water dispenser voice module sends a welcome voice, and the working power indicator light is on. If it is night, the voice module will not start, and only the working power indicator light will be on. The voice module starts during the day and turns off at night, and can be adjusted to family mode and business mode. The business mode can be used in public places such as schools, supermarkets, and hotels.
2) Water level detection, start lighting. After the working power is turned on, the liquid level sensor detects whether the water level is sufficient. If the water level is insufficient, the voice module will give an alarm, and the water level alarm light will be on, prompting the user to add water without proceeding to the next step. If the water level meets the requirements, the light at the water outlet will be on, and it will enter the heating process.
3) Water cup detection, start heating. When the user presses the hot water button, the obstacle detection module composed of photosensitive sensors detects whether the water cup is placed in the hot water port. If a water cup is detected, the hot water solenoid valve opens, and the heater heats up immediately to release hot water. If no water cup is detected, the hot water solenoid valve is closed, no water comes out from the hot water outlet, and at the same time, the user is prompted by voice to put the water cup into the water outlet. The temperature sensor detects the instant electric heater in real time to ensure that the temperature is normal. If the temperature is abnormal, it will automatically cut off the power to prevent safety accidents. After the user finishes receiving the hot water, the water cup is removed, and the single-chip microcomputer controls the instant heater and the lighting to turn off. After the person leaves, the human body detection module sends a signal to the single-chip microcomputer to turn off the working power to achieve the purpose of energy saving.
4) Child lock. The water dispenser uses a hot water button and an obstacle detection module to double control the hot water outflow. This design prevents children from putting their hands on the water outlet when playing, but because the hot water button is not pressed at the same time, the water outlet will not release hot water. Prevent children from being scalded by boiling water, and effectively realize the child lock function. At the same time, it also prevents the user from accidentally pressing the hot water button, but since there is no water cup to receive water, the water outlet will not release hot water.
4. Water dispenser software design
The software design of the system adopts a modular structure, and is designed from top to bottom according to the control function of the system. The software structure of the whole system is simplified, which is convenient for design and debugging.
This water dispenser improves the problems existing in the traditional water dispenser, and uses 51 single-chip microcomputers to realize the control of the water dispenser, which makes up for the shortcomings of the traditional water dispenser. Compared with traditional water dispensers, they are healthier, safer, energy-saving, and more convenient. The intelligence of water dispensers is reflected in the combination of single-chip microcomputers and various sensor modules. This comprehensive application concept is also the development trend of intelligent home appliances.
The above are the details of the water dispenser solution introduced by Shenzhen Zuchuang Microelectronics Co., Ltd. for you. If you have the electronic function development needs of the water dispenser, you can rest assured to entrust it to us. We have rich experience in customizing the development of electronic products. We can evaluate the development cycle and IC price as soon as possible, and can also calculate the PCBA quotation. We are a number of chip agents at home and abroad, including MCU, voice IC, Bluetooth IC and modules, wifi modules. Our development capabilities cover PCB design, single-chip microcomputer development, software custom development, APP custom development, WeChat official account development and other hardware and software design. It can also undertake the research and development of smart electronic products, household appliances scheme design, beauty equipment development, Internet of Things application development, smart home scheme design, TWS scheme development, Bluetooth audio development, children's toy scheme development, and electronic education product development.
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