US20070053776A1

US20070053776A1 - Control device for fluid pressure and flow direction

Info

Publication number: US20070053776A1
Application number: US11/220,551
Authority: US
Inventors: Bor-Haw Chang
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-09-08
Filing date: 2005-09-08
Publication date: 2007-03-08

Abstract

A control device for fluid pressure and flow direction includes a fan and a frame member. The fan has an inlet and an outlet and the frame member provides at least a first opening and a second opening at two lateral sides thereof. A middle solid part is disposed in the frame member extending to the second opening from the first opening in a way of gradual convergence. A flow passage is formed between the middle solid part and the frame member with an end thereof at the second opening side being greater than the other end at the first opening side. Therefore, the fluid is controlled to increase or decrease the pressure thereof, decrease noise and flow direction.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention:
The present invention is related to a control device for fluid pressure and flow direction and particularly to a control device joined to the inlet and the outlet of the fan.
2. Brief Description of the Related Art:
Due to electronic parts being updated continuously, speed, performance and power are promoted along with problem of heat generation.
Usually, high power electronic parts are high heat generator such as high speed central processing unit. If heat is unable to be removed from the heat generation parts, the performance is degraded tremendously to affect life span of the parts. In order to allow the high power electronic parts executing the original performance thereof and increasing life span thereof, problem of heat dissipation of the parts generally is investigated.
Further, referring to FIG. 1, a conventional fan includes a fan frame 11 and a fan wheel 12 attached in side the fan frame 11. The fan frame 11 has an inlet 111 and an outlet 112 at two lateral sides thereof respectively with a hub seat 113. The fan wheel 12 includes a hub 121 and a plurality of fan blades 122 extending radially from the hub 121. The fan wheel 12 is rotationally joined to the hub seat 113. When the fan wheel 12 rotates, the fan blades 122 induce fluid to enter the fan frame via the inlet 111 and flow outward via the outlet 112.
However, the preceding fan creates a problem that the fluid consumes during moving and the fluid pressure is unable to increase such that it is incapable of providing effect of heat dissipation.

SUMMARY OF THE INVENTION

In order to solve the preceding problems, an object of the present invention is to provide a control device for fluid pressure and flow direction with which the fluid pressure can be increased or decreased under control.

BRIEF DESCRIPTION OF THE DRAWINGS

The detail structure, the applied principle, the function and the effectiveness of the present invention can be more fully understood with reference to the following description and accompanying drawings, in which:
FIG. 1 is a sectional view of a conventional fan;
FIG. 2 is an exploded perspective view of the first embodiment of a control device for fluid pressure and flow direction according to the present invention;
FIG. 3 is another exploded perspective view of the first embodiment of a control device for fluid pressure and flow direction according to the present invention;
FIG. 4 is an assembled perspective view of the first embodiment of a control device for fluid pressure and flow direction according to the present invention;
FIG. 5 is a sectional view of the first embodiment of a control device for fluid pressure and flow direction according to the present invention;
FIG. 6 is another sectional view of the first embodiment of a control device for fluid pressure and flow direction according to the present invention;
FIG. 7 is a further sectional view of the first embodiment of a control device for fluid pressure and flow direction according to present invention;
FIG. 8 is a further sectional view of the first embodiment of a control device for fluid pressure and flow direction according to the present invention;
FIG. 9A is a sectional view illustrating another configuration of the middle receiving part in the first embodiment of a control device for fluid pressure and flow direction according to the present invention;
FIG. 9B is a sectional view illustrating a further configuration of the middle receiving part in the first embodiment of a control device for fluid pressure and flow direction according to the present invention;
FIG. 9C is a sectional view illustrating a further configuration of the middle receiving part in the first embodiment of a control device for fluid pressure and flow direction according to the present invention; and
FIG. 10 is a sectional view of the second embodiment of a control device for fluid pressure and flow direction according to the present invention.

DETAILED DESCRIPTION OF THE INVENTION

Referring to FIGS. 2 to 5, the first preferred embodiment of a control device for fluid pressure and flow direction according to the present invention includes a fan 21 and a frame member 22. The fan 21 further includes a fan frame 211 and a fan wheel 212. The fan frame 211 has an inlet 2111 and an outlet 2112 at two opposite lateral sides thereof respectively and the fan wheel 212 is rotationally joined to a fan wheel seat 2113 disposed near the outlet 2112.
The frame member 22 has at least a first opening 221 at a lateral side thereof and at least a second opening 222 at another lateral side thereof. A middle solid part 223 is arranged in the frame member 22 to extend to the second opening 222 in an convergent way from the first opening 221 such that a flow passage 224 is formed between the middle solid part 223 and the frame member 22 extending toward the second opening 222 from the first opening 221 along with a dimension thereof getting larger. Further, the second opening 222 is arranged to corresponding to and be joined to the side of the inlet 2111.
When the fan wheel 212 is actuated to run, the fluid is induced to enter the flow passage 224 via the first opening 221 and the second opening 222 to the inlet 2111 of the fan 21 and then moves outward via the outlet 2112. Flow speed of the fluid becomes slower gradually due to the dimension of the flow passage 224 getting larger and fluid pressure is increasing while moving out of the outlet 2112. Further, fluid pressure increasing results in greater resistance of fan 21 and heat dissipation is enhanced substantially.
Referring to FIG. 6, the first opening 221 of the frame member 22 can be joined to the fan 21 at the outlet 2112 side such that the fluid pressure is controlled to increase for promoting heat dissipation efficiency and to gather toward the center thereof for decreasing stagnation zone at the back of the middle solid part 223 during moving outward the second opening 222.
Referring to FIG. 7, the first opening 221 of the frame member 22 can be joined to the fan 21 at the inlet 2111 side such that the fluid provides faster flow speed and decreasing fluid pressure during passing the flow passage 224 and the fluid pressure reduces to decrease noise while the fluid moves outward via the outlet 2112.
Referring to FIG. 8, the second opening 222 of the frame member 22 can be joined to the fan 21 at the outlet 2112 side such that the fluid is controlled to reduce pressure thereof for decreasing noise and to flow toward the center of the first opening 221 so as to spread outward and expand heat dissipation area.
The middle solid part 223 is provided with different shapes shown in FIGS. 9A, 9B and 9C. FIG. 9A shows the middle solid part 223 a has a shape converging gradually from the first opening 221 to the second opening 222 with a cross section of hexagon shape. FIG. 9B shows the middle solid part 223 b extends outward the first opening 221 at an end thereof. FIG. 9C shows the middle part 223 c pressing against the first opening 221. The preceding three different shapes of middle solid parts 223 a, 223 b and 223 c are capable of controlling changes of the fluid pressure, reducing noise and flow direction.
Referring to FIG. 10, the second embodiment of a control device for fluid pressure and flow direction according to the present invention is illustrated. The present embodiment is similar to the preceding first embodiment. It is noted that identical parts are designated with the same references and no detail will be described further. The difference of the present embodiment from the first embodiment is in that at least a static wing 225 connecting with the inner wall of the frame member 22 and the middle solid part 223 such that the static wing 225 is disposed in the flow passage 224 is capable of increasing fluid pressure for enhancing heat dissipation efficiency, reducing noise and controlling flow direction.
While the invention has been described with referencing to preferred embodiments thereof, it is to be understood that modifications or variations may be easily made without departing from the spirit of this invention, which is defined by the appended claims.

Claims

1. A control device for fluid pressure and flow direction, comprising:

a fan, providing an inlet and an outlet; and

a frame member, providing at least a first opening at one lateral side thereof and a second opening at another side thereof and having a middle solid part therein extending to the second opening from the first opening in a way of gradual convergence;

wherein, a flow passage is formed between the middle solid part and the frame member and the flow passage at the second opening side is greater than that at the first opening.

2. The control device for fluid pressure and flow direction as defined in claim 1, wherein the second opening is connected to the inlet side of the fan.

3. The control device for fluid pressure and flow direction as defined in claim 1, wherein the first opening is connected to the outlet side of the fan.

4. The control device for fluid pressure and flow direction as defined in claim 1, wherein the first opening is connected to the inlet side of fan.

5. The control device for fluid pressure and flow direction as defined in claim 1, wherein the second opening is connected to the outlet side of the fan.

6. The control device for fluid pressure and flow direction as defined in claim 1, wherein at least a static wing is joined to the inner wall of the frame member and the middle solid part.