Negative pressure fans and environmental protection air conditioners discharge air to make indoor air pressure drop, indoor air becomes thinner, forming a negative pressure area, air due to pressure difference compensation into the room. In the practical application of industrial plants, the negative pressure fan is installed on one side of the plant, and the air inlet is on the other side of the plant, and the air from the air inlet to the negative pressure fan forms a convection secondary wind. In this process, the doors and Windows close to the negative pressure fan are kept closed, and forced air is compensated by the door and window on one side of the air inlet into the workshop. The air is lined up and orderly from the air inlet into the workshop, flows through the workshop, and is discharged from the workshop by the negative pressure fan. Thorough and efficient ventilation, ventilation rate up to 99%. Through specific engineering design, according to the need to design ventilation speed and wind speed, any high heat, harmful gases, dust smoke dew can be quickly discharged from the workshop, any poor ventilation problems can be solved once and for all. Ventilation can be achieved within seconds of starting the fan.

Negative pressure fan cooling principle

    1. Ventilation and cooling: the air temperature in places requiring ventilation is higher than outdoor due to the sunlight shining on buildings, machinery and equipment, human body and other heat sources. The negative pressure fan can discharge the indoor hot air quickly, so that the room temperature and the outside temperature is flat, so as not to increase the temperature in the workshop.

   2.air flow takes away heat from the human body. Air flow accelerates the evaporation of sweat and absorbs heat from the human body, thus making the human body feel cool, just as cool as the natural wind.

   3. negative pressure fan only ventilation cooling function, no refrigeration function, cool is the feeling of the human body. It is unscientific to say how much temperature a negative pressure fan can drop.

   4. When used with water curtain, the temperature in the workshop can be controlled within 28 degrees Celsius in the hottest days of summer. But the cool feeling of the human body can be compared with air conditioning, slightly long time to the water curtain people will feel cold and can not stand.

Negative pressure fan is the use of cooling principle, ventilation, smoke and odor exhaust equipment. How effective does it work? Let's take a look:

1. Improve indoor air

The addition of negative pressure fan can improve the indoor air quality, provide a comfortable working environment, can improve certain work efficiency. In some industries where fans are used, air pollution in factories can be caused, especially because of the special nature of production. Therefore, not only is the environmental quality relatively low, but in the long run, the health of employees will certainly suffer to some extent.

Therefore, the installation of negative pressure fan can improve the indoor ventilation effect to a certain extent and effectively protect the health of employees. It mainly uses some nozzles, mufflers and some fan body, as well as front and rear fluid. Streamline industrial fan is mainly used in the nozzle series, with very high efficiency and good performance. The equipment is not allowed to collide with other metal shops, but also to gently handle the stainless steel tube.

2, noise treatment

After some noise reduction, the negative pressure fan generally does not reach the corresponding national standards and national noise emission standards, so as to achieve the satisfaction of the owner. Of course, the working principle of this fan is to use the gas loss is low, and then the pressure is low. In general, the gas can be directly treated as an incompressible fluid, without considering the gas contraceptive changes. According to the principle that the corresponding kinetic energy can then be converted into potential energy, the gas is continuously accelerated by the high-speed rotating impeller, and then the flow kinetic energy is changed.

Negative pressure fan is generally installed outside the window of the workshop, choose the outlet for exhaust, extract odor gas, general chemical plant and other applications are more.

The principle of

Is the use of air convection, negative pressure ventilation cooling principle, natural inhalation of fresh air from the installation site to the door or window, the indoor stuffy gas quickly forced out of the outdoor, any poor ventilation can improve the machine, cooling ventilation effect can reach 90%-97%. The whole machine adopts CAD/CAM design, with low investment cost, large air volume, low noise, low energy consumption, stable operation, long life, high efficiency, automatic shutters to dustproof, waterproof, beautiful and generous; Can blow air, is a modern factory cooling ventilation of high quality choice, but also ventilation. The negative pressure fan of environmental protection and energy saving will become the mainstream of ventilation and cooling equipment market. Prevent rainwater intrusion.

The material

1. Outer frame material

FRP glass fiber negative pressure fan: fiber reinforced plastic (FRP) : light, high strength, good corrosion resistance, excellent insulation material, used to manufacture insulation. Good dielectric protection at high frequencies. Microwave transmittance is good. (4) Good thermal performance. FRP thermal conductivity is low, not easy deformation, nai fire. Due to the above characteristics of FRP, the negative pressure fan made of glass fiber reinforced plastic is resistant to high temperature, acid and alkali resistance, light weight and stable, and has a longer service life

2. Transmission mode

Direct type

(1) The direct negative pressure fan blade is directly installed on the motor, reducing the power loss generated by transmission, with the power of the fan, the direct negative pressure fan air volume is about 10% larger than the belt type.

(2) Direct type without belt friction noise

(3) Motor: the motor is the heart of the negative pressure fan, and the direct motor is the aluminum shell motor with a special 12-pole dustproof and waterproof grade above IP55

(4) Air blade: the air blade of negative pressure fan is divided into aluminum alloy, stainless steel, aluminum alloy foundry, aluminum alloy die casting, nylon iron and other materials. The difference of the air blade material is determined according to the different places of use. Commonly used blades are aluminum alloy, stainless steel, aluminum alloy sand leaf.

With more and more people born after 1990 pouring into the workplace, more and more people pay attention to the workplace environment. In spring and winter, the production environment of the production workshop in summer is especially worrying, such as smoke, peculiar smell, high temperature and no ventilation........ Ventilation and cooling are more and more important, so why should the workshop choose environmental protection air conditioning?

1. Large air volume and far air supply

Maximum air volume per hour is 20000 to 60000 cubic meters, can be selected according to customer requirements, high wind pressure, long air supply.

2. Low power consumption, only 1 KWH per hour

Installing central air conditioning and evaporative air cooler in the same area requires only 1/10 of the power consumption of central air conditioning

3. Good air quality

Set ventilation, ventilation, dust removal, cooling in one, increase space oxygen content, improve work efficiency, the whole air supply or post air supply at will

4. Adjust the humidity

Humidity adjustment for workplace where air humidity needs to be increased

5. Strong cooling effect

In the southern region, the general cooling effect of 4℃~10℃, in the hot and dry areas, the cooling can be up to 4℃~15℃, and the rapid cooling

This is the real multi-purpose machine, environmental protection air conditioning is all fresh air operation, the main machine is generally installed outside the workshop, go to the factory to cool down, does not occupy the use area of the workshop, there will be no noise affect the work of employees. Its installation cost is also very low, only 1/5 of the central air conditioning, and the environmental requirements are not high, whether open or closed places can be applied, very suitable for workshop cooling ventilation.