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Working principle of automatic double cargo shower
Working principle of automatic double cargo shower(1) Air circulation purificationThe air circulation purification system of the automatic double-opening cargo shower is like a sophisticated "air purification factory", which operates efficiently and orderly. When the shower room is started, the fan begins to operate, producing a strong suction, and the surrounding air is continuously sucked into the shower room. This air is first passed through a primary filter, which acts as a "large dust catcher" based on interception and inertial collision. Its interior is composed of multiple layers of fiber materials, which are interwoven with each other, forming many small pores. When large dust particles in the air, such as hair, fiber, dust larger than 5 microns, etc. pass through the primary effect filter with the airflow, they will be intercepted by these pores, or due to the effect of inertia, deviate from the direction of the airflow, collide and adhere to the fiber. So it's effectively filtered out. The primary filter can remove 80%-90% of large particle pollutants in the air, reducing the burden for subsequent efficient filtration, while also protecting the high-efficiency filter and extending its service life. The air initially purified by the primary filter will then enter the HEPA filter. The high-efficiency filter is the core of air purification, it uses advanced filtration technology, such as Brown diffusion and electrostatic adsorption. Its filtration medium is usually made of ultra-fine glass fiber paper or synthetic fiber and other materials, these materials have a very high filtration efficiency and can filter out 0.3 microns and above in the air of tiny dust particles, bacteria, viruses, and other pollutants, filtration efficiency can reach more than 99.99%. In the high-efficiency filter, the tiny dust particles will make irregular motion because of Brownian motion, increasing the chance of collision with the filter medium, to be captured; At the same time, some dust particles will carry static electricity, attract each other with the opposite charge of the filter medium, and be adsorbed on the above, to achieve the deep purification of the air. After purification, the clean air will be sent to the plenum, which plays the role of stabilizing the airflow and evenly distributing the air. Subsequently, clean air from the plenum through the pipe, at a high speed from the nozzle around the air shower. These nozzles are 360 degrees rotatable in design and can be used to blow the goods in all directions, the clean air flow speed can usually reach 25m/s or more, and the strong airflow is like countless "invisible hands", quickly and effectively blows the dust particles attached to the surface of the goods. The blown dust particles are sucked into the return air system with the airflow and are filtered again by the primary effect filter and high-efficiency filter, which removes the dust particles and re-enters the circulation, so the cycle is repeated to ensure that the cargo shower room always maintains high cleanliness of the air environment. (2) Automatic double-door system The double-door system of the automatic double-opening cargo shower adopts an advanced electronic interlock mechanism, which is like a solid "security line" to strictly control the entry and exit of goods and prevent unpurified air from entering the clean area. The electronic interlock system realizes the interlock function between two doors through the cooperative work of electrical control and mechanical structure. When one door is opened, the corresponding door lock will automatically lock, while the other door lock will also be locked, no matter what method is used, you can not open two doors at the same time. Only when the first door is completely closed and locked, the other door can be unlocked and opened, this strict interlocking mechanism effectively avoids the direct flow of air between the clean area and the unclean area, preventing the intrusion of external pollutants. In terms of opening the door control, the automatic double-opening shower is usually equipped with two ways of human body sensing devices and a button control to meet the operational needs of different users. The body sensing device adopts advanced infrared sensing technology, and its working principle is based on the pyroelectric effect of the human body. The human body has a constant body temperature, generally about 37 ° C, and will emit a specific wavelength of about 10μm infrared, infrared sensors can detect the infrared emitted by the human body. When goods or personnel enter the sensing area, the infrared sensor receives the infrared signal from the human body, converts it into an electrical signal, and transmits it to the control system. After receiving the signal, the control system, after analysis and processing, will immediately issue instructions to control the motor to drive the door to open and realize the automatic door-opening function. When the goods or personnel leave the induction area, after a certain delay time, the control system will issue instructions again, so that the door body automatically closes. This kind of human body induction control mode has the characteristics of convenient operation and fast operation and can realize the automatic entry and exit of unattended, which greatly improves the efficiency of entry and exit of goods. Button controls provide a way for users to operate manually. In the cargo shower room on both sides of the door, there is usually an operation button, the user can according to the actual needs, by pressing the button to control the opening and closing of the door. In some special cases, such as the failure of the human body sensor or the need for manual intervention, the button control mode can ensure the normal use of the cargo shower and provide the user with a reliable backup means of operation. Whether it is human induction control or button control, it is closely coordinated with the electronic interlock system to ensure the safe and efficient operation of the automatic double-open cargo shower and ensure that the goods entering the clean area are always in a clean environment. |
