Dust free workbench

The dust-free workbench can be divided into vertical flow dust-free workbench and horizontal flow dust-free workbench, also known as Class 100 dust-free workbench,clean benchA dust-free workbench is an air purification device that provides a locally dust-free and sterile working environment, and can manually control the discharge of contaminated air in the work area through a dedicated filtering channel to avoid harm to people and the environment. It is a safe microbial specific dust-free workbench.

Classification of dust-free workbench:
The dust-free workbench is divided into vertical flow cleanbench and horizontal flow cleanbench according to the direction of airflow. The vertical flow cleanbench has a higher noise level due to the fan being at the top, but the vertical wind blowing is mostly used in pharmaceutical engineering to ensure the health of the person; Horizontal flow workbenches have relatively low noise levels and are often used in the electronics industry, with little impact on physical health. According to the operating structure, it can be divided into two forms: single-sided operation and double-sided operation. According to its purpose, it can be further divided into ordinary dust-free workbench and biological (pharmaceutical) dust-free workbench.

Divided by the number of operators into single person dust-free workstations and double person dust-free workstations; Structurally, it can be divided into two types: downward suction and upward suction; The air supply is divided into horizontal air supply and vertical air supply.
Application of dust-free workbench:
Widely used in related industries such as biological laboratories, medical and health care, biopharmaceuticals, etc., it has a good effect on improving process conditions, protecting the health of operators, and improving product quality and yield.

Instructions for using a dust-free workbench:
The advantages of a dust-free workbench are easy and comfortable operation, high work efficiency, short preparation time, and can be operated in more than 10 minutes after starting up. It can be used at any time. In factory production, when the workload of inoculation is large and requires frequent and long-term work, a dust-free workbench is an ideal equipment. The dust-free worktable is powered by a three-phase motor with a power of about 145~260W. The air is blown out through a "super filter" composed of specially made microporous foam plastic sheets laminated together to form a continuous, dust-free, sterile, ultra clean air laminar flow, which is called "efficient special air". It removes dust, fungi, bacterial spores, etc. larger than 0.3 μ m. The flow rate of ultra clean air is 24-30m/min, which is sufficient to prevent pollution caused by possible air disturbance nearby. Such a flow rate will not hinder the use of alcohol lamps or Bunsen lamps for burning and disinfecting equipment. The staff operates under such sterile conditions, ensuring that the sterile materials are not contaminated during the transfer and inoculation process. But if there is a power outage during operation, the materials exposed to unfiltered air will be difficult to avoid contamination. At this point, the work should be quickly completed and a mark should be made on the bottle. If the material inside is in the proliferation stage, it will no longer be used for proliferation and will be transferred to rooting culture in the future. If it is a general production material, it can also be discarded due to its extreme abundance. If it is in the process of rooting, it can be left for future planting.

The power supply for dust-free workbenches mostly adopts a three-phase four wire system, with one neutral wire connected to the machine casing and firmly connected to the ground wire. The other three wires are all phase wires, and the working voltage is 380V. There is a certain order in which the three wires are connected to the circuit. If the wire end is connected incorrectly, the fan will reverse, and the sound will be normal or slightly abnormal. There is no wind on the front of the dust-free workbench (you can observe the movement with an alcohol lamp flame, and it is not advisable to test for a long time). The power supply should be cut off in time. Just swap the positions of any two phases of the wire ends and connect them again to solve the problem. If only two phases are connected to the three-phase line, or if one phase of the three-phase line has poor contact, the machine sound is very abnormal. The power should be cut off immediately and carefully inspected, otherwise the motor will be burned. These common sense should be explained to the staff at the beginning of using the dust-free workbench to avoid accidents and losses that should not be caused.

The air inlet of the dust-free workbench is at the bottom of the back or front, and there is a common foam plastic sheet or non-woven cloth in the metal mesh cover to block large particles of dust. It should be checked and disassembled frequently. If the foam plastic is aging, it should be replaced in time. Except for the air inlet, if there are any air leakage holes, they should be sealed tightly, such as by sticking adhesive tape, stuffing cotton, sticking adhesive paper, etc. The metal mesh cover on the front of the workbench is equipped with a super filter, which can also be replaced. If the dust particles become clogged or the wind speed decreases due to long-term use, and sterile operation cannot be guaranteed, a new one can be installed.

The service life of a dust-free workbench is related to the cleanliness of the air. In temperate regions, dust-free workbenches can be used in general laboratories. However, in tropical or subtropical regions, due to the high amount of pollen or dust in the atmosphere, dust-free workbenches should be placed indoors with good double doors. Under no circumstances should the air inlet cover of the dust-free workbench be facing open doors or windows to avoid affecting the service life of the filter.

The sterile room should be regularly dusted and disinfected with 70% alcohol or 0.5% phenol spray, wiped with 2% benzalkonium bromide (70% alcohol is also acceptable), regularly fumigated with formalin (40% formaldehyde) and a small amount of potassium permanganate, and sterilized with ultraviolet sterilization lamp (more than 15 minutes each time) to keep the sterile room highly sterile. The inside of the vaccination box should also be equipped with ultraviolet lamps. Before use, the lamps should be turned on for at least 15 minutes to sterilize, but any areas that cannot be irradiated still have bacteria. When the ultraviolet lamp is turned on for a long time, it can stimulate oxygen molecules in the air to form ozone molecules. This gas component has a strong bactericidal effect and can produce a sterilizing effect on corners that are not directly irradiated by ultraviolet light. Due to the harmful effects of ozone on health, the ultraviolet lamp should be turned off before entering the operation. After turning off, it can be entered for more than ten minutes.

UV lamps can also be hung on a dust-free workbench, but they should be installed outside the lighting lampshade and arranged in parallel with the lighting fixtures staggered, so as not to obstruct the lighting during work. If the ultraviolet lamp is installed inside the lighting lampshade (glass plate), it is useless because ultraviolet rays cannot penetrate glass, and its lamp tube is made of quartz glass, not silicate glass.

The vaccination room strives for simplicity, and any items that are not directly related to the work of the room cannot be placed in order to maintain a sterile state. The air inside the vaccination room should be completely isolated from the outside air, and the reserved ventilation ducts should be as sealed as possible. Ventilation ducts can be equipped with upper and lower ventilation windows, with a slightly larger window area that needs to be covered with 4 layers of gauze for simple dust filtration. After a day of work, windows can be opened for sufficient ventilation before being sealed. In short, it is necessary to have clean, dust-free, and sterile air, as well as fresh and suitable for work. The gauze covering the ventilation window should be changed frequently. However, the above measures are only ideal design solutions and are often not easy to fully implement. In fact, as long as strict aseptic operation procedures are followed and a dust-free workbench is provided for protection in an open door and window room, the contamination rate of vaccination can still be controlled at a tolerable level in production.

Safety precautions for dust-free workbench:
Basic safety precautions
1. Applicable type, please do not use outdoors. Do not place it near high-speed dust sources and seismic sources.
2. This product does not have explosion-proof capability and is strictly prohibited from use in flammable and explosive environments. And it is prohibited to use it in places with high humidity, condensation, dust, oil fumes, and mist.
3. Please do not use volatile oils, diluents, etc. to wipe the body, so as not to damage the paint dust or cause paint dust discoloration.
4. Do not impact the glass to avoid causing harm to the human body.
5. Ensure maintenance space and facilitate the replacement of fans and filters, as well as the maintenance of electrical components and circuits.

Safety precautions for dust-free workbench electrical appliances
1. First, place the device in place before wiring and connecting the power plug to avoid electric shock.
2. Please confirm whether the rated voltage and frequency of the equipment are equal to the parameters of the input power supply to avoid damaging the equipment and causing a fire.
3. Reliable grounding operation must be implemented for the equipment. Do not connect the power plug to a socket with a protective grounding wire to ensure the safe use of the equipment.
4. Do not repeatedly operate the power switch within one minute to avoid damaging electrical components due to frequent actions.
5. This product does not have riot control capability and is strictly prohibited from use in flammable and explosive environments.
6. Please do not touch the electrical components inside the product. When it is necessary to touch, please unplug the power plug first.
7. Modification is strictly prohibited to avoid accidents such as electric shock and fire.
8. Please do not place heavy objects on the power leads and do not apply pressure to the power leads to avoid fire and electric shock caused by damaged power leads.
9. When replacing a fuse, ensure that its capacity does not exceed the specified capacity.
10. When not in use for a long time, please unplug the power plug from the socket.
11. When an abnormal situation occurs, please stop powering on.

Safety precautions for dust-free workbench operation
1. The opening position of the exhaust valve has been set, and it is strictly prohibited to change its setting state.
2. It is strictly prohibited to open the sliding door above the "safe height" during work, otherwise it may cause personal injury.
3. When replacing, maintaining, and repairing filters, the workbench must be sterilized before proceeding.

Design Scheme Diagram Explanation:
1Primary filter2. Fan 3High Efficiency Filter4. Control panel 5, lighting, sterilization lamp 6, two or three plugs (220V 50HZ)
7. Glass 8, countertop 9, adjustable feet 10, universal wheels.

Specification, model and detailed parameter description of dust-free workbench:
Divided into three types based on the number of employees: single person, small double person, and large double person;

Model: ZJ-HCB-960 (WxDxH)

Dimensions (mm): 960x780x1580

Working size (mm): 940x600x650

Applicable number of people: single person

Model: ZJ-HCB-1200 (WxDxH)

Dimensions (mm): 1200x780x1580

Working size (mm): 940x600x650

Applicable number of people: Small double person

Model: ZZJ-HCB-1500 (WxDxH)

Dimensions (mm): 1500x780x1580

Dimensions (mm): 940x600x650

Applicable number of people: Large double person

Efficient filter: Aluminum frame without partition, efficiency: 99.99% @ 0.3um

Primary filter: aluminum frame plate, efficiency: 85% @ 5um (weight method)

Wind speed (m/s): 0.1~0.5m/s

Control system: gear speed regulation/stepless speed regulation/integrated circuit

Differential pressure monitoring: American Dywer differential pressure gauge/LED digital display (optional)

Sound dB: ≤ 58 (test point 1.5m away from the air outlet surface)

Box material: high-quality A3 cold-rolled steel plate, multi-layer acid washed, dust-free, electrostatic baking paint or high-quality stainless steel

Table material: High quality sandblasted stainless steel

Fan: German EBM/Taiwanese fan/domestic fan selection)

Fan power: 280W/600W/600W

日光灯功率： 20 W/30W/40W

Power supply voltage: 220 V 50HZ