Application case of micro diaphragm liquid pump in atomization disinfection robot

Introduction to atomization disinfection robot

As people pay more and more attention to health, sterilization and disinfection have become routine tasks in public places such as hospitals, factories and schools. In order to help the staff reduce the heavy work and avoid the harm to the human body in the disinfection operation, the intelligent atomization disinfection robot came into being. The fight against the epidemic requires the power of science and technology!

In the COVID-19 epidemic, disinfection robots have also received widespread attention. The intelligent atomization disinfection robot is a multi-functional intelligent disinfection equipment that can quickly atomize disinfection and automatically spray the disinfection area without manual intervention. Commonly used disinfectants: hydrogen peroxide (hydrogen peroxide), sodium hypochlorite, peracetic acid, etc. The principle of sterilization and disinfection: the disinfectant relies on its strong oxidizing ability to denature the proteins on the bacteria and viruses, thereby killing the pathogenic microorganisms.

Introduction to atomization principle

Existing atomization technologies include gas-liquid mixed type (two-fluid type), ultrasonic type, ultra-high pressure type (100MPa 300MPa), evaporation type, etc. The following content briefly describes the principle of two-fluid atomization and ultrasonic atomization. These two atomization methods are currently the most widely used. For example, atomization disinfection robots mostly use ultrasonic atomization, which is more convenient to operate and better in atomization effect, and can achieve the effect of dry fog (water mist particles larger than 2.5µm and smaller than 10µm)

Two-fluid atomization principle:

Two-fluid atomization is an atomization method that uses a two-fluid atomization nozzle to atomize liquid through compressed air. The liquid and compressed air pass through the nozzle through their respective paths, and the compressed air (about 300~600kPa) can generate high-speed air with large kinetic energy, which can efficiently atomize the liquid into small droplets. The liquid is transported by a micro liquid pump, which does not require the liquid to have a high pressure (about 60~120kPa), even at a low feed rate, the suction brought by the airflow is sufficient to guide the liquid to the nozzle. At a constant feed rate, the degree of atomization can be controlled by adjusting the air flow rate.

Two-fluid atomizing nozzles have different principles due to different designs of different companies. For example, according to the different ways of mixing air and liquid, it can be divided into internal mixing type (airflow and liquid contact in the nozzle) and external mixing type (airflow and liquid contact after gushing out of the nozzle)

In addition, there is also an ultrasonic resonance atomizing nozzle on the market, which also belongs to the category of two-fluid atomization, but it is not only as simple as two-fluid, but also enters the resonant cavity of the nozzle through high-speed airflow, forming a high-frequency pressure wave, and the resonant cavity is violent at high frequency. Oscillation generates ultrasonic waves to strengthen atomization. The atomization effect is better, and it can be atomized below 10µm (dry fog)

Principle of ultrasonic atomization:

In addition to the above-mentioned ultrasonic gas atomization using ultrasonic resonance atomizing nozzles, there is another ultrasonic atomization that does not require high-speed air flow and high-pressure liquid. This ultrasonic atomization uses electronic high-frequency oscillation (the oscillation frequency is 1.7MHz or 2.4MHz, which exceeds the range of human hearing, and the electronic oscillation is absolutely harmless to humans and animals). Through the high-frequency resonance of the ceramic atomizer, the The molecular bonds between liquid water molecules are broken to produce natural and elegant water mist without heating or adding any chemical reagents. The main components of this ultrasonic atomization device are electronic high-frequency oscillating integrated circuits and atomizing sheets. Widely used in humidifiers, incense, disinfection machines, fog machines, etc.

Application Analysis of Micro Diaphragm Liquid Pump in Atomization System

Most atomization systems require micro diaphragm liquid pump to transport liquid media stably. For example, in the intelligent atomizing robot, the role of the micro liquid pump is to continuously provide disinfectant from the liquid storage tank to the atomizing device.

Application difficulties:

1. Liquid media such as disinfectants are corrosive to a certain extent, and micro pumps are required to have anti-corrosion capabilities;

2. Atomization is a continuous process, and the micro diaphragm liquid pump continuously transmits the medium, which needs to be as maintenance-free as possible, and has high requirements for the service life of the pump;

3. Regardless of whether it is household or medical atomization equipment, the entire atomization system needs to operate with as little noise as possible

Solutions

Micro diaphragm liquid pump product recommendation:

Hilin micro diaphragm liquid pump has rich atomization-related application cases in the medical industry. Such as the atomization disinfection system of the intelligent atomization disinfection robot, the automatic spray disinfection system of the intelligent blood collection robot, etc.

Hilin micro diaphragm liquid pump can meet the stringent conditions of high reliability and low noise in the medical industry

1.Micro diaphragm liquid pump S15:

Brief description: Micro diaphragm liquid pump, brushless motor, gas-liquid dual-purpose, rated working voltage 5V, no-load liquid flow: 20mL/min

Advantages: wide voltage (3.2 ~ 6V), small volume, self-priming, stable flow, compatible with complex medium, remote control

2.Micro diaphragm liquid pump S23:

Brief description: Micro diaphragm liquid pump, brushless motor, gas-liquid dual-purpose, rated working voltage 12V, no-load liquid flow: about 0.4L/min

Advantages: stable flow, small size, low noise, compatible with complex medium, remote control

3.Micro diaphragm liquid pump S36 series:

Model: S36L, S36M, S36S

Brief description: Miniature liquid diaphragm pump, brushless motor, gas-liquid dual-purpose, rated working voltage 24V, no-load liquid flow range: 1.3-3L/min (S36L: 3L/min, S36M: 2L/min, S36S: 1.3L /min)

Advantages: stable flow, adjustable flow, high pressure height, compatible with complex medium, remote control