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What are the classifications of clean rooms?

A clean room refers to a space with good airtightness that controls air cleanliness, temperature, humidity, pressure, noise and other parameters as needed   psb (15)   Cleanroom Classification   According to the flow state of airflow   According to the flow state of the airflow, there are mainly the following three types of clean rooms with airflow distribution [1]   (1) Non-unidirectional flow clean room: It is often called a turbulent clean room before, and the airflow in the room does not all flow in a single direction. Non-unidirectional flow clean rooms have several common characteristics: the terminal filter (high efficiency or sub-efficiency) is as close as possible to the clean room, it can be the air supply port or directly connected to the air supply port, or it can be connected to the air supply static plenum in the room. ; The return air outlets are located in the lower part of the clean room, in order to avoid the phenomenon of "ashing". There are eddy currents in non-unidirectional flow clean rooms, which are not suitable for clean rooms with high cleanliness, but should be used in clean rooms of class 6 to 9.   (2) One-way flow clean room: The air flow of one-way flow clean room is characterized by parallel streamlines, flowing in a single direction, and uniform wind speed on the cross section. There are vertical one-way clean rooms, quasi-vertical one-way flow, and horizontal one-way flow. Convective clean room, etc.   (3) Vector clean room: air is supplied at the upper corner of the room, using a fan-shaped high-efficiency filter, or an ordinary high-efficiency filter with a fan-shaped air outlet, and a return air outlet in the lower part of the other side, the height of the room is higher than normal It is appropriate to be between 0.5 and 1. This clean room can also achieve Class 5 (Class 100) cleanliness.   The flow pattern of the clean room is basically the above three types, but many forms can be evolved in practical applications. The clean room can be a mixed flow pattern combining unidirectional flow and non-unidirectional flow to achieve a high level of clean room in a localized area (unidirectional flow section). For example, a "tunnel" (one side is open) with horizontal unidirectional flow is set up in the clean room, and the rest of the clean room is a unidirectional flow pattern of eddy current, so that the "tunnel" part can achieve a cleanliness level of 5 or higher, and the workbench Right in the "tunnel".   By properties of controlled particles   (1) Industrial clean room: a clean room in which the controlled particles are non-biological particles such as dust.   (2) Biological clean room: a clean room in which the controlled particles are biological particles.
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2022-03

VHP Hydrogen Peroxide Low Temperature Plasma Space Sterilizer

Release Time : 2022-03--26 Click Volume : 938
VHP hydrogen peroxide low temperature plasma space sterilizer is mainly used in clinical medical equipment that meets the requirements of medical materials and geometric shapes. As long as it is used according to the requirements, the sterilizer can reach the sterilization level of 10-6SAL. The hydrogen peroxide low-temperature plasma sterilizer can perform low-temperature sterilization of metal medical devices and low-temperature sterilization of non-metal medical devices. Medical devices are sterilized by diffusing hydrogen peroxide within the chamber, which is then "energized" into a plasma state. Combined with plasma, hydrogen peroxide vapor can safely and rapidly sterilize medical instruments and materials without leaving toxic residues. All stages of the sterilization process are run in a dry, low temperature environment so they will not damage instruments sensitive to heat or moisture, work with both metallic and non-metallic instruments, and allow hard-to-reach items such as hemostat hinges (not easy to spread). ) to sterilize the parts of the instrument. The first company to introduce plasma sterilization technology was Johnson & Johnson of the United States. At present, domestic manufacturers such as Beijing Kesp, Chengdu Laoken, and Shandong Xinhua are well-known. Hydrogen peroxide plasma is a new low-temperature sterilization technology that was introduced in the 1990s. Plasma is considered to be the fourth state besides liquid, gas and solid. It is formed by the excitation of gas molecules in an extremely vacuum cavity. Hydrogen peroxide plasma sterilization has the advantages of short sterilization cycle time and complete decomposition of the final product with low toxicity. However, due to the contamination of Mycobacteria tuberculosis, the US FDA has not approved the use of a diffusion enhancer to solve the problem of the difficulty of hydrogen peroxide vapor penetrating long and narrow lumen items.
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26
2022-03

The dust particle counter corresponds to the particle size and the pulse voltage one by one

Release Time : 2022-03--26 Click Volume : 736
Use a dust particle counter to detect whether the filter is leaking to avoid air filter leakage and affect the entire production. The dust particle counter mainly detects whether the suspended particles at each point exceed the required range of the clean area. If so, there is a leakage phenomenon, which needs to be plugged or replaced. This is also a relatively simple and accurate method of operation. After the filter is installed or replaced, the installation and connection of the filter must be checked for leaks to ensure that the cleanliness of the clean room meets the requirements.   After the particles of different particle sizes are converted by the photoelectric system of the laser dust particle counter, electrical pulse signals of different amplitudes (voltages) will be generated. The larger the particle size, the higher the pulse voltage. The relationship between signal voltage and particle size is also called conversion sensitivity. For a given laser dust particle counter, the particle size and pulse voltage correspond one by one. For example, the conversion sensitivity of a laser dust particle counter is 0.3μm corresponds to 69mv, 0.5μm corresponds to 531mv, 1.0μm corresponds to 701mv, etc. If the particle counter detects a pulse of 100mv, the particle size must be greater than 0.3μm and less than 0.5μm. The laser dust particle counter is an instrument that measures the number of particles greater than or equal to a certain particle size, and its internal circuit is a circuit that counts the number of pulses greater than or equal to a certain voltage value. For the example in the previous paragraph, to measure the number of particles greater than or equal to 0.3μm in the air, in the circuit is to count the number of pulses greater than or equal to 69mv, and to measure the number of particles greater than or equal to 0.5μm, in the circuit is to count the number of pulses greater than or equal to 0.5μm is the number of pulses of 531mv, and so on. Therefore, the measurement of dust particles by the dust particle counter mainly depends on the parameter of conversion sensitivity.
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26
2022-03

Online monitoring particle counter transmitter

Release Time : 2022-03--26 Click Volume : 986
Suspended particle transmitter for continuous monitoring of suspended particulates in sterile room environment, as well as isokinetic sampling head and protective cover, can be equipped with self-cleaning filter, professionally used for clean environment online suspended particle monitoring. Two ways of mounting the transmitter:①Mixes Y09-SS,evenly power SS sampling pump and transmitter in one. Main structure:Shell SUS 316Outer dimension:Ø80X160mmDimension of evenly speed sampling pump:Ø33X30mm，material: SUS316Mount in the sampling position and operate at the sampling are.②REMOTE 5102-S/RS,Equal-power stainless steel sampling head and transmitter are separated,main construction:All aluminum housing, square box structureOuter dimension of transmitter:140*64*100mmDimension of evenly speed sampling tube:Ø33X500mm, material SUS316Transmitter mounts on the wall or on the device, evenly speed sampling tube mounts on the sampling position. Main Characteristics: Size channel is 0.5um and 5.0um,Sampling flow rate is 1.0CFM(28.3L/min)Analog signal output is RS232/RS485 or 4－20mA LED indicator: Green light means the transmitter .Is working and otherwise the transmitter is not work.PowerL7.4-12VDCWavelength:650nm Life time: 60,000 hours
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26
2022-03

Introduction of HJ Clean Dust Detector

Release Time : 2022-03--26 Click Volume : 531
Dust detector is referred to as dust instrument, also known as dust measuring instrument or dust tester. It is mainly used to detect the dust concentration in ambient air. The types of dust instruments are divided into: laser dust instrument, online continuous monitoring dust instrument, portable dust instrument, etc. , Dust meter is widely used in the Center for Disease Control and Prevention, mining, metallurgy, power plants, chemical manufacturing, health supervision, environmental protection, environmental online monitoring and so on.   Suzhou HJ Dust Detector   Technical principle   Dust detector, working principle mainly includes light scattering method, beta ray, AC electrostatic induction principle; suitable for various research institutions, meteorology, public health, labor hygiene, air pollution research, etc. There are five main methods for rapid detection instruments: light scattering method, β-ray method, micro-weight balance method, electrostatic induction method, and piezoelectric balance method.     Product Series   The series of products on the market include: LD series, explosion-proof dust instrument series, domestic explosion-proof dust instrument, laser dust instrument, etc. The accuracy and measurement range of these products are also different, and the accuracy is 0.01mg/m3 and 0.001mg/m3, The range is 0.01-100mg/m3, 0.001-10mg/m3.
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26
2022-03

How to choose the main configuration of the clean bench

Release Time : 2022-03--26 Click Volume : 648
The fan of the clean workbench should be a high-power, low-noise, low-vibration, long-life, and high-efficiency centrifugal motor. The wind speed can be adjusted in multiple levels, with digital display. An adjustable air volume fan system should be used. The light touch switch can adjust the voltage and the speed regulation performance is stable, and the wind speed in the working area can always be guaranteed to be in an ideal state under the state of the final resistance of the high-efficiency filter. The damper can arbitrarily adjust the pre-filtered air intake air volume. The top side air intake can be used to reduce the pollution of the filter fan caused by natural falling dust.   Steel plate paint vertical flow workbench-1   The clean workbench should include two parts, the intake filter and the exhaust filter. The intake and exhaust filters can be designed with three-stage air filtration, and the exhaust filter system must be equipped with an adsorbent filter device. The special filter ensures that the discharged air meets the national sanitation standard. The high-efficiency air filtration system with pre-filter is adopted, with stable and reliable performance, ensuring that the working area is a sterile environment and preventing edge leakage. The high-efficiency filter system can be made of steel material covered with epoxy resin, with a spring washer, so that the pressure is evenly distributed on the entire high-efficiency filter to ensure the effective sealing of the high-efficiency filter.   The lighting of the clean workbench can be equipped with fluorescent lamps in and outside the operation area, and sterilization ultraviolet lamps should be equipped in the work area.   The alarm system of the clean workbench is equipped with an air flow detection alarm device, which can be seen or heard. It can monitor the air flow speed at the entrance of the work area at any time to ensure safety.   The pressure gauge of the clean workbench should clearly indicate the pressure difference on both sides of the high-efficiency filter, and keep abreast of the resistance change of the high-efficiency filter, so as to remind the replacement of the high-efficiency filter.
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Time of issue:2020-02-20 00:00:00

HJ CLEAN Engineering 　　　丨　　　HJ CLEAN instrument　　　丨　　　HJ CLEAN official website
鸿基洁净

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Time of issue:2020-02-20 00:00:00

SUZHOU HJCLEAN TECH Co., LTD

Address: 18,Lou Feng Chuangtou Industrial Area,Suzhou Industrial Park,China

Contact email：market@hjclean.com
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