02/09What do you know about the mute fan?
With the improvement of people's living standards, people also have a higher pursuit of the living environment. More and more new wind products are entering our daily life, and the new wind system that everyone uses includes the mute fan. So what do you know about the mute fan?
The mute fan is the first choice for the health of the modern people. The mute fan is accompanied by the process of human modern home, the so-called fresh air is the fresh air. Silent fan refers to the outdoor fresh air through the filter to the interior, at the same time the indoor air is discharged to the outside, to achieve the balance of the system also carried out air replacement of the room, make a closed space to realize air convection science, also added a respiratory system for you room. It guarantees fresh air at any time in a closed room.
In modern society, the mute fan is a pursuit of high quality life and is the most effective air pollution solution. It is more effective to suppress side noise that is easy to produce after installation. The design of high static pressure operation can improve the stability of air flow when the static pressure changes. Using a new type of fan, can greatly improve the static wind volume environment, achieve high efficiency and low energy consumption saving power. Quick net feature: use new type of chassis, smaller size. Ultra light and ultra-thin design, the machine is placed in the ceiling, does not occupy the room space, does not affect the interior decoration effect. The unique structure design, the wind tube silencing technology is applied to the equipment, so as to ensure the perfect silence effect.
The mute fan is composed of a fan, an inlet, a exhaust pipe, and a variety of pipes and joints. The mute fan is forced to form a new wind flow field in the system depending on the mechanical air supply and the wind. The new air ventilator product system is a new kind of environmental protection electric appliance that keeps the indoor air clean and fresh at all times. The independent indoor air replacement and purification circulatory system eliminates the indoor air pollution, and inputs 100% natural fresh air, and the fresh air in the indoor room is filtered and sterilize first. The mute fans discharge the dirty air from each room, while the fresh air enters the room through the "natural inlet" installed on the wall. According to the size of the room, the number of rooms, equipped with a variety of different types of air, to meet the needs of different. The static wind fan system, combined with the natural inlet, fully introduces outdoor fresh air, mechanical exhaust air, and natural air.
There are several key points for the operation of the silent fan: 1., the controllable fresh air path: through the reasonable design, we should control the fresh air path according to the scientific way, so as to achieve the best wind exchange effect. 2., controllable fresh air volume: according to the national standard, we need to regulate independently according to the size of the fresh air, so that we can get enough fresh air in the room without wasting. 3. controlled new wind time: flexibly control the new air ventilation time according to the needs, that is, to meet the demand for new wind and save energy. 4. controlled environmental impact: the noise produced by the equipment must meet the environmental requirements and avoid the pollution of the living environment. 5., enough service life: when the quality of the equipment is guaranteed, the life of the motor determines the life of the system. Because of the complex installation of the equipment, the renewal and maintenance are all very tedious, so the sufficient life of the product is the key factor of the silent fan.
The control parameters of the pipe fan are air volume, total pressure, efficiency, noise and motor power. According to the physical and chemical properties of the transported gas, the ventilator of different uses is selected.
Product features: 1. pipe ventilator selection control parameters for air volume, full pressure, efficiency, noise, motor power and so on. 2. choose different uses of ventilator according to the physical and chemical properties of the transported gas. For transporting clean air, general ventilators should be chosen; inflammable and explosive gases should be chosen, explosion-proof ventilators should be chosen; corrosive fans should be chosen for transporting corrosive gases. 3. when selecting fan, we should consider the loss of the air leakage and the calculation error of the pipeline system, as well as the negative deviation of the actual air volume and the wind pressure of the fan. Generally, the air factor is 1.05 to 1.1, and the wind pressure is 1.10 to 1.15. But it is not too big to prevent the ventilator from running in a low efficiency area for a long time. 4. pay attention to the matching relationship between the resistance characteristics of the pipe network and the fan characteristics. In order to make the ventilation function run stably, the ventilator should work near its highest efficiency point. The working point of the fan is located on the right side of the total pressure peak point in the performance curve, that is, the large air volume side, and is generally located at 80% of the total pressure peak. 5. for the ventilation system with muffling requirements, we should first choose a fan with high efficiency and low impeller circumferential speed, and work in the vicinity of the highest efficiency point. According to the transmission mode of noise and vibration of the ventilation system, the corresponding measures of noise reduction and vibration reduction should be taken. 6., through changing the shape of blade, the pipe ventilator can make part of the axial flow and partial centrifugal effect after the air flow enters the fan, so its performance is between the axial flow fan and the centrifugal fan. The 7. pipe ventilator provides medium air pressure and medium air volume. It is suitable for the ventilation system in the high-rise civil buildings.
Installation: installation pedestal 1. fan (foundation, hanger) should have the strength, stability and durability enough, pedestal vibration should meet the following requirements: 1) frequency motor and fan speed shall not be greater than the 1/3 based device; 2) the operation of the fan vibration vibration speed and ventilation when the machine static difference must be greater than 3 times. 2. the connection between the inlet and outlet of the ventilator and the wind pipe should be provided with a flexible joint. The air inlet pipe, air outlet pipe and other devices should be supported separately and firmly supported by the foundation or other components of the building, and the shell should not bear the weight of other parts. 3. when the ventilator is installed on the building components, vibration isolation measures should be taken. The installation of 4. ventilator can be carried out according to the standard design atlas of the following countries. The 5. pipe ventilator can be installed on the straight pipe, which has the advantages of convenient takeover and small space.
Centrifugal fan is a mechanism that relies on the input of mechanical energy to increase the pressure of gas and discharge the gas. It is a kind of driven fluid machinery. Centrifugal fan is widely used in factories, mines, tunnels, cooling towers, vehicles, ships and buildings ventilation, dust and cooling; industrial boilers and furnaces ventilation and air conditioning; cooling and ventilation equipment and household appliances in the air; grain drying and selected; wind tunnel wind source and hovercraft air and promotion.
Working principle: centrifugal fan is based on the principle of converting kinetic energy into potential energy, and accelerates the gas with high speed rotating impeller, then decelerates and changes the direction of flow, so that kinetic energy can be converted into potential energy (pressure). In a single stage centrifugal fan, the gas enters the impeller from the axial direction, and the gas flows through the impeller into the radial direction and then enters the diffuser. In the diffuser, the gas changes the direction of the flow and increases the section area of the pipe to slow the air flow, which converts the kinetic energy into the pressure energy. The pressure increases mainly in the impeller, followed by the expansion process. In a multistage centrifugal fan, a reflux is used to make the air flow into the next impeller and produce higher pressure.
02/01External rotor axial fan
The external rotor axial flow fan has the characteristics of compact structure, convenient installation, reliable operation, low noise, energy saving and high efficiency. Products are widely used in hotels, restaurants, industrial and mining enterprises, office buildings, theaters and other building facilities, as a refrigerator freezer supporting equipment or ventilation and heat dissipation. (for example, refrigerators, ice making machines, cold air blower, cold water machine, condensing unit and other refrigerating equipment or facilities for supermarket, with dehumidifier, evaporator, side wall fan, fire fan, central air conditioner fan and other equipment).
The external rotor axial flow fan consists of fan blades, external rotor motor, mesh hood and lead wire. The structure of the fan is calculated by the finite element method. The strength check, modal analysis and harmonic response analysis are used to ensure that the product has the advantages of stable and reliable structure, high safety factor, small vibration and strong anti-interference ability. According to customer requirements, we can install heat protector, connection box and other components, or choose cylinder type, Fang Kuang. Different types of installation. The blade is designed according to the principle of aerodynamic law, acoustic principle and acoustic performance. The blade is twisted from the top to the root of the leaf according to a certain rule. The material is made of high quality steel sheet or plastic. Through dynamic balance check, the starting performance is good, the operation is smooth and the noise is low.
02/01A brief overview of the pole motor
A pole motor is a kind of single-phase induction AC motor. The auxiliary winding made up of a copper ring is called the cover coil. In order to provide a magnetic field to the rotor, the current in this coil delays the magnetic flux of that part of the magnetic pole. The direction of rotation reaches the shielding ring from the side of the no cover.
Basic working principle of the hood motor
The shielded coil (shielded ring) is configured to offset the shaft of the hood from the central axis of the main pole.
When the power is connected to the stator, the magnetic flux of the main part of the magnetic pole is used as the auxiliary winding of the transformer to induce the voltage of the hood coil.
There is a phase difference between the current of the auxiliary winding of the transformer and the current of the main winding.
The current of the pole coil is in phase difference with the current of the main excitation winding.
Therefore, the magnetic flux of the pole is in phase difference with the magnetic flux of the main pole.