45results about How to "Improve fan performance" patented technology

A fan apparatus includes a ducted housing with an axis of rotation including a first section and a second section. The fan apparatus further includes a first plurality of vanes being radially coupled within the first section and a second plurality of vanes being radially coupled within the second section. Additionally, the fan apparatus includes an impeller with a plurality of blades rotatably disposed within the ducted housing between the first plurality of vanes and the second plurality of vanes for rotary motion about the axis of rotation. The first plurality of vanes are stationary in a first arrangement to guide an inflow of air towards the impeller. The plurality of blades are rotary in a second arrangement to have a rotational direction substantially opposite to the inflow of air guided by the first arrangement. The second plurality of vanes are stationary in a third arrangement to diffuse an outflow of air substantially along the axis of rotation.

The present invention generally relates to a fan and in some aspects to an impeller with increased performance or efficiency. The fan according to some embodiments of the present invention has a housing, an impeller, and a motor driving the impeller. The impeller can be manufactured and/or arranged within the housing to make the fan more efficient under certain operating conditions. In some embodiments, the impeller is equipped with blades having a non-constant radius of curvature. In other embodiments, the impeller is equipped with two sets of blades, which include primary blades and secondary blades. These blades can be offset from each other to increase performance. In yet other embodiments, the space between the secondary blades and the housing can be manipulated to increase performance. Additionally, other embodiments adjust the cross-sectional shape of the flow path through the impeller to increase performance.

A fan cooling device and a method of controlling a fan rotation speed are provided. The fan cooling device includes a thermo sensor, a thermo monitor unit, a processing unit, a driving unit, and a fan. The thermo monitor unit compares the sensed result from the thermo sensor with at least one threshold, and decides whether or not to send an interrupt event according to the compared result. The processing unit executes an interrupt service according to the interrupt event, and then sets and outputs a value of the fan rotation speed. The driving unit drives the fan and controls the rotation speed of the fan according to the value of the fan rotation speed. The fan sends out a wind flow to reduce the internal temperature of a computer system or a CPU.

A fan assembly (10) includes a housing (20) with an air inlet (70), a fan inlet (60), and an air outlet (80). The fan assembly further includes an impeller (30) and a motor (40) configured to drive the impeller, the impeller having a plurality of circumferentially positioned spaced blades (34). An air-permeable guard (50) is positioned between the air inlet and the fan inlet to prevent users from touching the impeller (30), and is spaced a first distance (54) from the fan inlet (60), and a second distance from the air inlet (70) so that a filter (90) may be provided between the air inlet (70) and the air-permeable guard (50). Preferably, the first distance (54) is such so as to allow incoming air to at least partially rotate prior to entering the fan inlet. Preferably, the plurality of circumferentially positioned spaced blades (34) is positioned circumferentially around a domed center (32) of the impeller (30), the domed center (32) facing the fan inlet (60), and the domed center (32) co-rotates with the spaced blades (34).

An axial fan comprises a hub and a plurality of blades extending from the hub; wherein each blade comprises a main blade portion and a secondary blade portion and the secondary blade portion has a leading edge adjacent to a leading edge of the main blade portion and forms a flap for the main blade portion; wherein a fluid passage is defined between the leading edge of the main blade portion and the leading edge of the secondary blade portion; wherein the main blade portion has a main chord and the secondary blade portion has a secondary chord; and wherein the main chord and the secondary chord form a relative attack angle comprised between 5° and 35°.

A fan includes an impeller and a motor. The impeller includes a hub and a plurality of blades. The hub has a top portion, a connection portion, and at least one airflow-guiding portion. The top portion is connected to the connection portion. The blades are disposed around the connection portion. The motor is disposed corresponding to the impeller and used to drive the impeller to rotate. The airflow-guiding portion is disposed between two adjacent blades.

The invention discloses a volute tongue. The volute tongue is characterized by comprising a supporting frame and a flexible volute tongue wall forming the outer contour of the volute tongue; the supporting frame comprises an upper supporting body, a lower supporting body and a variable-R column body, the upper supporting body and the lower supporting body are arranged at the root of the volute tongue, and the variable-R column body is arranged at the head of the volute tongue; the upper supporting body, the lower supporting body and the variable-R column body are distributed in a triangle shape; the volute tongue further comprises a driving mechanism used for driving the variable-R column body to rotate. The invention further discloses a centrifugal fan comprising the volute tongue. The volute tongue has the advantages that the flexible volute tongue wall of the volute tongue is supported on the upper supporting body, the lower supporting body and the variable-R column body distributedin the triangle shape; the upper supporting body and the lower supporting body are arranged at the root of the volute tongue; the variable-R column body is arranged at the head of the volute tongue;the driving mechanism drives the variable-R column body to rotate and can achieve variable-R adjustment of the volute tongue so as to change the gap between the volute tongue and an impeller; accordingly, the performance of the draught fan is improved or noise is reduced, and the volute tongue can better adapt to various actual working conditions.

A cooling fan having a motor is disclosed. The cooling fan includes a stator assembly and an impeller. The stator assembly includes a shaft-coupling portion and a coil unit. The impeller includes a hub and a magnetic element. An axial air gap is formed between the magnetic element and the coil unit. A height between a bottom face of the shaft-coupling portion and a top face of the hub is from 1.5 mm to 3.5 mm. The coil unit has a first maximum width, and the hub has a second maximum width. A ratio of the first maximum width to the second maximum width is from 0.7 to 1.3. A method for determining the dimensional proportion of the motor includes selecting a ratio of a first maximum width to a second maximum width as 0.7 to 1.3, and determining the values of the first and second maximum widths.

The invention discloses an indoor cooling and ventilating system of a large synchronous compensator. The indoor cooling and ventilating system comprises an inner shell, an outer shell, a water-air cooler and cooling fans, wherein the cooling fans are arranged on the outer sides of the ends of a rotor; the water-air cooler is arranged under a stator; the inner shell is arranged at the periphery ofthe stator and is connected with the cooling fans and the water-air cooler to form an inner air area; the outer shell is arranged at the periphery of the inner air area and is connected with the innershell to form a sealed system; a part, close to the outer side, of an iron core of the stator is divided into a plurality of stator iron core sections along radial ventilation channels; the ventilation channels are formed in the iron core of the stator along a radial direction in a manner of passing through the iron core of the stator; an air inlet hole, an axial air channel and a radial hole areformed in the rotor. According to the indoor cooling and ventilating system of the large synchronous compensator, a sealed type full-air cooling manner is used for cooling; the indoor cooling and ventilating system is high in cooling efficiency, few in auxiliary machinery devices, simple and convenient to operate, low in fault rate and convenient to maintain.

A shield system adapted for use in an air cooler structure (100). The shield system includes at least one flexible sheet (304) and at least one arrangement (106) for fixing, in use, the at least one flexible sheet to an air cooler structure.

An impeller used in a fan is provided. The impeller includes a hub and a plurality of blades disposed around the hub. The hub has at least one curve-shape surface. A fan comprises a fan frame, an impeller, and a motor. The impeller disposed in the fan frame comprises a hub and a plurality of blades disposed around the hub, wherein the hub has at least one curve-shape surface and an airflow guiding structure disposed on an outer circumference of the hub. The motor is disposed in the impeller for driving the impeller.

The invention provides a multi-online draught fan control method. i draught fans are arranged, wherein i is larger than or equal to 2 and smaller than or equal to 3. The multi-online draught fan control method comprises the steps that the initial rotating speeds of the i draught fans are detected and denoted as x<ij>, wherein j is an element of a set, namely [2,i]; and the rotating speeds f<ij> ofthe i draught fans are controlled to be subjected to pulse-type periodic change based on the initial rotating speeds x<ij>, and the rotating speed change directions of the adjacent draught fans are opposite. According to the multi-online draught fan control method, the superposition action of sound waves and vibration can be effectively prevented, the good noise reduction effect is achieved, andthe property of a complete machine unit is improved.