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A 40mm DC cross flow fan blows air in a horizontal direction. They are available in both 40mm width and 50mm width. Below are some types of 40mm cross flow fans:
40mm 12V Cross Flow Fan
The 40mm 12V cross flow fan is usually installed in electronic equipment like computers, gaming consoles, and electrical cabinets. It is commonly powered by the 12-volt output from a personal computer power supply. Since a PC power supply can easily stick to a fan as a mounting point, this fan's size becomes practical and common. Its narrow cross-section enables many fitments where a round fan may be too big.
LeadWire Cross Flow Fan
A 40mm DC cross flow fan with lead wires for the electrical connection is common in small to mid-size direct current fans. In many cases, combining the smaller size and horizontal airflow of this fan makes it the best choice for space-saving design. The two PBT blowers are mounted on either end of the central hub. This central hub contains the rotor with the stator and applies the electromagnetic principle to it. A uniform column of air is compressed and released through the two side ducts by the rotating hub. Then, a jet of high-velocity air is released through the column. These 40mm cross flow fans with lead wires are typical in low-voltage applications that need a small, effective fan, like games, toys, and dashboard instruments for the automobile.
40mm 24V Cross Flow Fan
The 40mm 24V cross flow fan is slightly bigger than the 40mm one. Most of the time, computers and printers use it. The 40mm 24V cross flow fan has a lot of airflow and does not get too loud.
The specifications of a 40mm DC cross flow fan will vary depending on its application and design. Here are some general specifications to consider:
Airflow Volume
The airflow or air volume is the amount of air that a cross flow fan moves in a given time. It is usually measured in cubic feet per minute (CFM) or liters per minute (LPM). The airflow volume of a 40mm cross flow fan is between 15 to 55CFM. Factors such as the speed, width, pressure drop of the system, the fan's design, and its optimization will affect it.
Air Pressure
The static air pressure that a cross flow fan generates is measured in inches of water gauge (in WG). The fan has to overcome the resistance of the airflow in the duct to create this pressure. The 40mm cross flow fan may create static air pressure of about 0.5 to 1.0 in WG.
Power Consumption
A 40mm cross flow fan power consumption is the amount of electrical power it consumes. It is measured in watts (W). The power consumed can be calculated as the voltage times the current (V x I). The power used is also affected by factors like the motor's efficiency, speed, airflow, and the pressure of the fan. A DC cross flow power consumption fan is more efficient than an AC fan.
Noise Level
The noise level or sound level produced when a 40mm cross flow fan is operating is measured in decibels (dB). The higher the airflow of a fan, the higher the noise it will produce. However, a cross flow fan is one of the quietest fans to use because the noise it produces from its airflow is low. The typical operating noise level of a 40mm is between 25 to 40 dB.
Life Expectancy
A 40mm cross flow fan DC motor bearings and commutator will wear out from constant use. So, its life span is about 10,000 to 50,000 operating hours. If the speed is near the maximum rated speed, then its life expectancy may be lower.
The above specifications can be used as a guide for testers and manufacturers of a 40mm cross flow fan. They can optimize each parameter's design, installation, and operating conditions to improve performance.
Generally, cross flow fans need to be cleaned once or twice a year. Customers can do occasional superficial cleaning with a vacuum or soft brush with light alcohol. If customers want in-depth cleaning, they can submerge the fan in a solution with mild soap or neutral detergent, but they should ensure that the cleaning solution does not enter the motor. The fan should thoroughly be dried before using it.
Air-conditioning and refrigeration systems
Cross flow fans are commonly used in air-conditioning and refrigeration systems. In air conditioners, they can be used for condensers, evaporators, and heat exchangers. Meanwhile, they are widely used in commercial refrigerators and freezers.
Computer and electronic devices
Cross flow fans are also used to cool other electronic devices. For instance, these type of fans are also used in other precise instruments and electronic devices. Some examples include oscilloscopes, routers, and medical devices. Additionally, 40mm cross flow fans can also be used to cool the lighting system. More specifically, in LED lamps and bulbs.
Automotive industry
The automotive industry uses cross flow fans for vehicle air conditioning and heating systems. Besides, they are also used for automotive electronics. More specifically, in automotive computers, battery management systems, and power inverters.
Optical projectors
Cross flow fans are commonly used in optical projectors. For instance, in cinema projectors, digital projectors, and microprojectors. Additionally, these type of fans are also used in photolithography projectors. More specifically, in semiconductor manufacturing.
Specialized equipment
Cross flow fans can also be found in specialized equipment. For instance, in laser cutters and engravers. As well as in imaging and scanning equipment like flatbed scanners and document scanners.
Required airflow:
The amount of air the fan needs to move is known as its airflow. It is usually expressed in cubic feet per minute (CFM), or sometimes in liters per second (L/s). The required airflow must be determined because it is essential to match the fan's airflow to the appliance's need.
Air pressure:
It is the pressure the fan has to overcome to move air through a system or space, and it is usually measured in inches of water column (in WC) or pascals (Pa). Users must determine the air pressure that needs to be overcome. It is essential to match the fan's pressure rating to the system or space's ducting requirements.
Noise level:
The amount of sound the fan produces is described as its noise level. The fans' noise levels are usually expressed in decibels (dB). Users should take into consideration the noise level that is permissible in a given environment. It is important to select a flow fan whose noise level is acceptable for use in that environment.
Durability:
The durability of a 40 mm DC cross flow fan refers to how long the fan is expected to last under normal use conditions. It is crucial to determine the operating environment, as a 40 mm DC cross flow fan may be exposed to high humidity, temperature or dusty conditions in the commercial setting. In these applications, it is necessary to choose a fan with a longer lifespan and a dependable design.
Q: What is the difference between AC and DC cross flow fans?
A: The front and rear cross flow fans are primarily driven by their motors. In this case, an alternating current (AC) is electric power from the electrical power source or mains supply. A 40mm DC cross flow fan takes direct current (DC) from power devices like batteries. AC motors run at a constant speed and are suitable for a large power range. On the other hand, DC motors allow a change of speed by varying the voltage and are ideal for applications requiring compact devices with low energy consumption.
Q: What happens if a cooling fan is not used in a system?
A: Heat will continue to form and impede the performance of other components.
Q: Are all cross flow fans the same size?
A: No. Cross flow fans come in a variety of sizes.
Q: What is airflow in cross flow fans?
A: Airflow is the amount of air the 40mm cross flow fan moves, usually indicated in cubic foot per minute (CFM).
Q: What determines the airflow of a cross flow fan?
A: A combination of speed, dimension, blade design, and motor power usually determines the CFM of a cross flow 40mm fan. The measurement is specific to each fan. However, the 40mm cross flow fan might have some specifications that make it ideal for a particular environment or application. Exhaust and case fans are desktop-powered applications and usually have a rating of 1000 to 2000 RPM. Other cross flow fans, like the 40mm mini cross flow fan, might rotate more than 2000 RPM to circulate more air to cool the system.
