Brief introduction of price analysis of exhaust fan
Different brands of exhaust fans have different prices, which are also related to power.
12v exhaust fan is about 260 yuan, but not expensive. 12v blower is very easy to use, full of wind power and saves electricity. Exhaust fan is also called cross-flow fan, centrifugal fan and small fan. It is a general air source for blowing or inhaling, and is usually used for inhaling mechanical equipment, so it is also called exhaust fan.
Kitchen exhaust fans are moderately priced. Last time, my friend bought Emmett ventilator SLIM6, bathroom window ventilator, kitchen and bathroom ventilator 6 inches, 99 yuan. For example, Emmett ventilator XF2539, window ventilator and kitchen lampblack mute ventilator need 149 yuan. Generally speaking, the price is relatively favorable.
General kitchen exhaust fan prices are as follows:
1, the boss CXW-200-82 18, the price is 7680 yuan.
2. Vantage CXW-200-J609BZ, the price is 3 156 yuan.
3. Tai Fang CXW-200-JQ25TE, the price is 4480 yuan.
What are the characteristics of exhaust fans?
1, according to the physical and chemical properties of the gas to be transported, choose ventilators with different uses. If conveying clean air, you should choose a general ventilator; Explosion-proof ventilator should be selected for conveying flammable and explosive gases; Corrosion-resistant fans are used to transport corrosive gases.
2. When selecting the ventilator, the air leakage loss and calculation error of the pipeline system and the negative deviation of the actual air volume and air pressure of the ventilator should be considered. General air volume is 1.05 ~ 1. 1, and air pressure is1./kloc-0 ~15. But don't use too much, in order to prevent breathing from running in the inefficient area for a long time.
3. Pay attention to the matching relationship between pipe network resistance characteristics and fan characteristics. In order to make the ventilator run stably, the ventilator should work near its highest efficiency point, and the working point of the ventilator is located on the right side of the peak point of total pressure in the performance curve (that is, on the side of large air volume, it is generally located at 80% of the peak point of total pressure).
4. For the ventilation system with noise elimination requirements, the ventilator with high efficiency and low impeller circumferential speed should be preferred, and it should work near the highest efficiency point. According to the transmission mode of noise and vibration generated by ventilation system, corresponding noise elimination and vibration reduction measures should be taken.
5. By changing the shape of the blades, the ducted fan makes the air flow into the fan have both partial axial flow and centrifugal effect, so its performance is between axial flow fan and centrifugal fan.
6. The duct ventilator can provide moderate wind pressure and air volume, which is suitable for the ventilation system of high-rise civil buildings.
Installation point of exhaust fan
1, ventilator installation base (foundation, hanger) should have sufficient strength, stability and durability, and the vibration of the base should meet the following requirements:
A, the natural frequency of the basic device shall not be greater than 0/3 of the motor and fan speed;
B, the difference between the vibration speed when the ventilator is running and the vibration speed when the ventilator is stationary should be more than 3 times.
2, the connection between the ventilator import and export and duct, should set up flexible joint. Air inlet pipe, air outlet pipe and other equipment should be independently and firmly supported by the foundation or other components of the building, and the casing should not bear the weight of other parts.
3, fan installed on building components, vibration isolation measures should be taken.
4. For fan installation, please refer to the following national building standard design atlas.
5. The pipe ventilator can be installed on the straight air duct, which is convenient to connect and occupies little space.
Generally speaking, the exhaust fan has the characteristics of low noise, low power consumption, large air volume, stable operation, long service life and high efficiency, and is waterproof, dustproof and beautiful with automatic shutter opening and closing system. And it has a wide range of uses. The negative pressure exhaust fan can be installed outside the workshop window, and generally, downward suction type and downward suction type are selected. Exhaust to the outside, and extract odor gas; Basically, it can be used in all places that need ventilation. From these perspectives, the exhaust fan is a product worthy of people's choice. I hope everyone can really apply it to life or work after understanding its price and characteristics.