FAN FRAME BODY STRUCTURE AND FAN WITH THE FAN FRAME BODY

A fan frame body structure and a fan with the fan frame body. The fan frame body structure includes a first fan frame body, a second fan frame body and a connection member. The connection member has a first opening and a second opening. The first and second openings are nonparallel to each other. The first and second fan frame bodies are respectively disposed at the first and second openings. The first and second fan frame bodies are inclined from each other. The first and second fan frame bodies are serially connected in a nonparallel form. Therefore, in the system, due to the resistance of the structure with such configuration, the audio frequency dipole structure is destructed so that the periodical noise and vibration characteristic are lowered.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates generally to a fan frame body structure and a fan with the fan frame body structure, and more particularly to a fan frame body structure in which two fan frame bodies are serially connected in a nonparallel form and a fan with the fan frame body structure.

2. Description of the Related Art

A fan can provide forced cooling effect. Therefore, the fan is irreplaceably applied to the server of a large-scale storage device to play a decisive role in heat dissipation. A high-performance fan not only can save power, but also can enhance the stability of the operation of the device. Moreover, it has become one of the competitive issues of fan manufacturers how to design low-noise fan products.

In recent years, due to the change of the market and the trend to develop future cloud system, the cloud system has a requirement for the fans that is different from the other fields. First, the performance of the fans applied to the cloud system is required to be 10% or even 15% higher than the other fields. This is because in the cloud and network communication system, the unit operation density is extremely high and the operation conditions of the chassis and the power supply are much stricter than any other environment. Moreover, the operation of the cloud system always 24-hour continues without interruption. Therefore, the requirements of the cloud system for stability, heat dissipation ability and noise control are much higher than a common system.

With respect to a high-density large-scale server, it is necessary to use a fan tray to provide strong airflow for achieving the object of heat dissipation. Therefore, in practice, there is a system of serially connected fan trays. Multiple sets of serially connected fans are further combined in parallel to form a large-scale fan tray system so as to achieve the object of heat dissipation.

In the internal space of the server, the hard disk device such as HDD is generally positioned right in front of the fan tray. The other heat generation components such as the CPU/GPU, DIMMs, memory card or the control panel are positioned right behind the fan tray. In this case, the direction of the flow field is nearly lined up with the respective components. Accordingly, the airflow will flow through the space of the hard disk on the front side into the blades of the heat dissipation fan and then exhaust to the rear side. As a result, the blades of the heat dissipation fan will periodically bear the pulse effect of the non-uniform airflows at the inlet and the outlet. This will make regular dipole noise to create louder periodical noise. The higher the requirement for the performance and heat dissipation effect is, the greater the extent to which the fan is affected by the development of the dipole is and the louder the periodical noise is.

Due to the dipole development of noise, after combined in parallel, the pairs of conventional fans generally will interact on each other to synergize the noise. Therefore, the periodical noise will become more serious. It is therefore tried by the applicant to provide a fan frame body structure and a fan with the fan frame body structure to solve the problem of noise or vibration caused after the fans are serially connected or combined in parallel.

SUMMARY OF THE INVENTION

It is therefore a primary object of the present invention to provide a fan frame body structure, which can solve the problems of noise and vibration caused after the fans are serially connected or combined in parallel.

It is a further object of the present invention to provide a fan with the fan frame body structure, which can solve the problems of noise and vibration caused after the fans are serially connected or combined in parallel.

To achieve the above and other objects, the fan frame body structure of the present invention includes a first fan frame body, a second fan frame body and a connection member.

The first fan frame body has a first passage and a first bearing cup seat. The first bearing cup seat and the first passage are normal to each other. The second fan frame body has a second passage and a second bearing cup seat. The second bearing cup seat and the second passage are normal to each other. The connection member has a third passage. The third passage has a first opening and a second opening at two ends. The first and second openings are nonparallel to each other. The first and second fan frame bodies are respectively disposed at the first and second openings. The first and second bearing cup seats are inclined from each other.

Still to achieve the above and other objects, the fan frame body structure of the present invention includes a first fan frame body, a second fan frame body and a connection member.

The first fan frame body has a first passage and a first bearing cup seat. The first bearing cup seat is inclined from the first passage. The second fan frame body has a second passage and a second bearing cup seat. The second bearing cup seat and the second passage are normal to each other. The connection member has a third passage. The third passage has a first opening and a second opening at two ends. The first and second openings are parallel to each other. The first and second fan frame bodies are respectively disposed at the first and second openings. The first and second bearing cup seats are inclined from each other.

Still to achieve the above and other objects, the fan frame body structure of the present invention includes a first fan frame body, a second fan frame body and a connection member.

The first fan frame body has a first passage and a first bearing cup seat. The first bearing cup seat and the first passage are normal to each other. The second fan frame body has a second passage and a second bearing cup seat. The second bearing cup seat is inclined from the second passage. The connection member has a third passage. The third passage has a first opening and a second opening at two ends. The first and second openings are parallel to each other. The first and second fan frame bodies are respectively disposed at the first and second openings. The first and second bearing cup seats are inclined from each other.

Still to achieve the above and other objects, the fan frame body structure of the present invention includes a first fan frame body, a second fan frame body and a connection member.

The first fan frame body has a first passage and a first bearing cup seat. The first bearing cup seat is inclined from the first passage. The second fan frame body has a second passage and a second bearing cup seat. The second bearing cup seat is inclined from the second passage. The connection member has a third passage. The third passage has a first opening and a second opening at two ends. The first and second openings are parallel to each other. The first and second fan frame bodies are respectively disposed at the first and second openings. The first and second bearing cup seats are inclined from each other.

Still to achieve the above and other objects, the fan with the fan frame body structure of the present invention includes a first rotor assembly, a first bearing, a first stator assembly, a second rotor assembly, a second bearing and a second stator assembly.

The first rotor assembly has a first fan hub and a first shaft. The first fan hub and the first shaft are normal to each other. The first bearing has a first shaft hole. The first bearing is disposed in the first bearing cup seat. The first shaft is rotatably connected in the first shaft hole.

The first stator assembly has multiple silicon steel sheets and multiple windings wound around the silicon steel sheets. The first stator assembly is fitted around the first bearing cup seat. The second rotor assembly has a second fan hub and a second shaft. The second fan hub and the second shaft are normal to each other. The second bearing has a second shaft hole. The second bearing is disposed in the second bearing cup seat. The second shaft is rotatably connected in the second shaft hole. The second stator assembly has multiple silicon steel sheets and multiple windings wound around the silicon steel sheets. The second stator assembly is fitted around the second bearing cup seat.

In the present invention, the first and second bearing cup seats are arranged in a nonparallel form. Therefore, in the system, due to the resistance of the structure with such configuration, the audio frequency dipole structure is destructed so that the periodical noise and vibration characteristic are lowered.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Please refer toFIGS. 1 and 2.FIG. 1is a perspective exploded view of a first embodiment of the fan frame body structure of the present invention.FIG. 2is a sectional assembled view of the first embodiment of the fan frame body structure of the present invention. According to the first embodiment, the fan frame body structure1of the present invention includes a first fan frame body11, a second fan frame body12and a connection member13.

The first fan frame body11has a first passage111and a first bearing cup seat112. The first bearing cup seat112and the first passage111are normal to each other. The first passage111is formed in the first fan frame body11.

The second fan frame body12has a second passage121and a second bearing cup seat122. The second bearing cup seat122and the second passage121are normal to each other. The second passage121is formed in the second fan frame body12.

The connection member13has a third passage131. The third passage131has a first opening132and a second opening133at two ends. The first and second openings132,133are nonparallel to each other. The first and second fan frame bodies11,12are respectively disposed at the first and second openings132,133. The first and second bearing cup seats112,122are inclined from each other.

The first fan frame body11further has a first inlet113and a first outlet114. The first inlet113and first outlet114are respectively positioned at two ends of the first passage111. The first outlet114is mated with the first opening132of the connection member13. Multiple first connection bodies115extend from a circumference of the first bearing cup seat112. The first connection bodies115can be static blades or ribs. The first connection bodies115are connected to an inner circumference of the first fan frame body11. The second fan frame body12further has a second inlet123and a second outlet124. The second inlet123and second outlet124are respectively positioned at two ends of the second passage121. The second inlet123is mated with the second opening133of the connection member13. Multiple second connection bodies125extend from a circumference of the second bearing cup seat122. The second connection bodies125can be static blades or ribs. The second connection bodies125are connected to an inner circumference of the second fan frame body12.

Please now refer toFIG. 3, which is a sectional assembled view of a second embodiment of the fan frame body structure of the present invention. The second embodiment is partially identical to the first embodiment in structure and thus will not be repeatedly described hereinafter. The second embodiment is different from the first embodiment in that the second outlet124of the second fan frame body12is mated with the second opening133of the connection member13.

Multiple second connection bodies125extend from a circumference of the second bearing cup seat122to connect with an inner circumference of the second fan frame body12. That is, the first and second inlets113,123of the first and second fan frame bodies11,12are arranged in reverse directions.

Please now refer toFIG. 4, which is a sectional assembled view of a third embodiment of the fan frame body structure of the present invention. The third embodiment is partially identical to the first embodiment in structure and thus will not be repeatedly described hereinafter. The third embodiment is different from the first embodiment in that the first bearing cup seat112is inclined from the first passage111. The second bearing cup seat122is normal to the second passage121. The first and second openings132,133of the connection member13are positioned in parallel to each other.

Please now refer toFIG. 5, which is a sectional assembled view of a fourth embodiment of the fan frame body structure of the present invention. The fourth embodiment is partially identical to the third embodiment in structure and thus will not be repeatedly described hereinafter. The fourth embodiment is different from the third embodiment in that the second outlet124of the second fan frame body12is mated with the second opening133of the connection member13. Multiple second connection bodies125extend from a circumference of the second bearing cup seat122to connect with an inner circumference of the second fan frame body12. That is, the first and second inlets113,123of the first and second fan frame bodies11,12are arranged in reverse directions.

Please now refer toFIG. 6, which is a sectional assembled view of a fifth embodiment of the fan frame body structure of the present invention. The fifth embodiment is partially identical to the first embodiment in structure and thus will not be repeatedly described hereinafter. The fifth embodiment is different from the first embodiment in that the first bearing cup seat112is normal to the first passage111. The second bearing cup seat122of the second fan frame body12is inclined from the second passage121. The first and second openings132,133of the connection member13are positioned in parallel to each other.

Please now refer toFIG. 7, which is a sectional assembled view of a sixth embodiment of the fan frame body structure of the present invention. The sixth embodiment is partially identical to the fifth embodiment in structure and thus will not be repeatedly described hereinafter. The sixth embodiment is different from the fifth embodiment in that the second outlet124of the second fan frame body12is mated with the second opening133of the connection member13. Multiple second connection bodies125extend from a circumference of the second bearing cup seat122to connect with an inner circumference of the second fan frame body12. That is, the first and second inlets113,123of the first and second fan frame bodies11,12are arranged in reverse directions.

Please now refer toFIG. 8, which is a sectional assembled view of a seventh embodiment of the fan frame body structure of the present invention. The seventh embodiment is partially identical to the first embodiment in structure and thus will not be repeatedly described hereinafter. The seventh embodiment is different from the first embodiment in that the first bearing cup seat112is inclined from the first passage111. The second bearing cup seat122is also inclined from the second passage121. The first and second openings132,133of the connection member13are positioned in parallel to each other.

Please now refer toFIG. 9, which is a sectional assembled view of an eighth embodiment of the fan frame body structure of the present invention. The eighth embodiment is partially identical to the seventh embodiment in structure and thus will not be repeatedly described hereinafter. The eighth embodiment is different from the seventh embodiment in that the second outlet124of the second fan frame body12is mated with the second opening133of the connection member13. Multiple second connection bodies125extend from a circumference of the second bearing cup seat122to connect with an inner circumference of the second fan frame body12. That is, the first and second inlets113,123of the first and second fan frame bodies11,12are arranged in reverse directions.

Please now refer toFIG. 9, which is a sectional assembled view of a first embodiment of the fan of the present invention. Also referring toFIGS. 1 to 9, the fan of the present invention includes the fan frame body structure of any of the first to the eighth embodiments of the present invention. The technical characteristics of the above embodiments will not be repeatedly described hereinafter. The fan2of the present invention further includes a first rotor assembly21, a first bearing22, a first stator assembly23, a second rotor assembly24, a second bearing25and a second stator assembly26.

The first rotor assembly21has a first fan hub211and a first shaft212. The first fan hub211and the first shaft212are normal to each other. The first bearing22has a first shaft hole221. The first bearing22is disposed in the first bearing cup seat112. The first shaft212is rotatably connected in the first shaft hole221. The first stator assembly23has multiple silicon steel sheets231and multiple windings232wound around the silicon steel sheets231. The first stator assembly23is fitted around the first bearing cup seat112.

The second rotor assembly24has a second fan hub241and a second shaft242. The second fan hub241and the second shaft242are normal to each other. The second bearing25has a second shaft hole251. The second bearing25is disposed in the second bearing cup seat122. The second shaft242is rotatably connected in the second shaft hole251. The second stator assembly26has multiple silicon steel sheets261and multiple windings262wound around the silicon steel sheets261. The second stator assembly26is fitted around the second bearing cup seat122.

The first rotor assembly21defines a first virtual central line21aextending toward the second rotor assembly24. The second rotor assembly24defines a second virtual central line24aextending toward the first rotor assembly21. The first and second virtual central lines21a,24aintersect each other without being parallel to or normal to each other. The first and second virtual central lines21a,24acontain an angle2aranging from 91° to 179°.

In the above embodiments, the first, second and third passages111,121,131communicate with each other. The first fan frame body, the connection member and the second fan frame body can be integrally serially securely connected with each other by means of adhesion, press fit, fusion, engagement or locking of locking members.

In the fan frame body structure and the fan with the fan frame body structure of the present invention, the first and second bearing cup seats112,122are disposed in the first and second passages111,121in an inclined state. Alternatively, the connection member13is arranged in an inclined state so that the first and second bearing cup seats112,122are nonparallel to each other. The first and second virtual central lines21a,24aof the two rotors (the first and second rotor assemblies21,24) are serially connected in a nonparallel form. Therefore, the configurations of the airflow inlet and outlet are changed. Due to the resistance of such structure, the audio frequency development of the dipole is destructed so that the periodical noise energy is minified. After serially connected, the fan structure is changed so that the directions of the airflow of the inlet and the outlet of the entire fan are changed. Under such circumstance, the audio frequency property is changed to reduce the periodical interference effect. As a result, the periodical noise is lowered. The structure of the fan of the present invention is optimized to be different from the conventional fan structure. This can change the inherent frequency of the fan as a whole.

The present invention is not limited to one single set of series fan. The present invention can also achieve the same effect for multiple sets of series fans, which are combined in parallel.

The present invention has been described with the above embodiments thereof and it is understood that many changes and modifications in such as the form or layout pattern or practicing step of the above embodiments can be carried out without departing from the scope and the spirit of the invention that is intended to be limited only by the appended claims.