TWI413731B - Pump - Google Patents

Abstract

A pump for a liquid cooling system includes a case, a stator received in the case, and a rotor having an outer magnet sleeve surrounding the stator and an inner magnet sleeve surrounded by the stator. A plate is formed in the case to separate the stator from the rotor. The inner magnet sleeve interacts with an inner magnetic field produced by the stator, thereby driving the stator to rotate together with the outer magnet s1eeve. Therefore, the inner and the outer magnetic sleeves produced by the stator can be utilized sufficiently, and an operating efficiency of the pump is enhanced accordingly.

Description

Pump

The present invention relates to a pump, and more particularly to a pump for a liquid cooled heat sink system.

Generally, electronic products with heat sources require a system for dissipating heat, such as a central processing unit (CPU) installed inside the computer. Since the central processing unit generates heat during operation, a heat sink must be placed on the central processing unit to prevent overheating.

In the conventional computer CPU heat sink, the liquid-cooled heat-dissipating system has been widely used. In order to make the coolant flow inside the liquid-cooled heat-dissipating system, a pump is generally provided to generate the coolant. The thrust causes the coolant to circulate, causing the coolant to carry away the heat of the CPU. A conventional pump generally includes a housing and a stator and a rotor housed in the housing. The rotor has a magnet that surrounds the stator. The stable magnetic field generated by the magnet is rotated by the alternating magnetic field generated by the stator, thereby causing the rotor to disturb the coolant and cause it to flow.

However, the rotor of the conventional pump has only one magnet surrounding the stator, and only the portion of the alternating magnetic field generated by the stator that acts outside the stator can act on the magnet of the rotor, and the portion located inside the stator does not play any role. Being idle Set, causing the magnetic field inside this part to be wasted. Since the rotor speed of the pump is proportional to the strength of the magnetic field, this partially wasted magnetic field will cause the magnetic energy utilization of the stator of the pump to be insufficient, thereby affecting the working efficiency of the pump.

In view of this, it is necessary to provide a pump having a high magnetic energy utilization rate, and the rotor has a configuration of a double magnet.

A pump for a liquid cooling heat dissipation system includes a casing and a rotor and a stator housed in the casing, the rotor including a magnet surrounding the stator, the rotor further comprising an inner magnet surrounded by the stator, A partition separating the stator and the rotor is formed in the housing.

Compared with the prior art, the rotor of the pump of the present invention further has an inner magnet disposed on the inner side of the stator, which interacts with an internal magnetic field generated by the stator to rotate the rotor together with the outer magnet. Thereby, the internal and external magnetic fields generated by the stator can be fully utilized, and the working efficiency of the pump is correspondingly improved.

10‧‧‧Base

12‧‧‧ openings

14‧‧‧ Inlet

140, 160‧‧‧ holes

16‧‧‧Water outlet

18‧‧ ‧ ribs

20‧‧‧shell

2000‧‧ ‧ partition

2002‧‧‧Second chamber

22‧‧‧ first chamber

220‧‧‧ shaft tube

222‧‧ ‧ gap

24‧‧‧First recess

26‧‧‧Second recess

28‧‧‧ Third recess

30‧‧‧ Stator

32‧‧‧Front frame

34‧‧‧ teeth

36‧‧‧ coil

38‧‧‧ Positioning Department

40‧‧‧Rotor

402‧‧‧ leaves

404‧‧‧ inner wheel hub

406‧‧‧Outer hub

408‧‧‧ shaft

42‧‧‧ Inner magnet

420, 442‧‧‧S pole

422, 440‧‧‧N pole

44‧‧‧External magnet

46‧‧‧ bearing

50‧‧‧ boards

60‧‧‧ cover

70‧‧‧shims

700‧‧‧Perforation

80‧‧‧Washers

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is an assembled view of a pump in accordance with an embodiment of the present invention.

Figure 2 is an exploded view of Figure 1.

Figure 3 is a view of the pump in Figure 1 with the circuit board and the cover hidden.

Figure 4 is a longitudinal sectional view of Figure 1.

Figure 5 is a schematic diagram of the operation of Figure 1.

Fig. 6 is a schematic view showing the operation of a pump according to another embodiment of the present invention.

As shown in FIG. 1-2, the pump of the present invention is used in a liquid cooling system (not shown) to dissipate heat from an electronic component (not shown), and includes a base 10 and a gasket placed in the base 10. 70. A housing 20 fixed to the base 10, a rotor 40 sandwiched between the housing 20 and the base 10, a stator 30 housed in the housing 20, and a housing 30 and electrically mounted The circuit board 50 of the stator 30 and a cover 60 fixed to the housing 20 and covering the circuit board 50 are connected.

The base 10 has a substantially square shape, and a circular opening 12 having a large diameter is formed in a middle portion thereof, and four corners of the four corners are respectively formed upward (not shown) for screwing (not shown). An annular rib 18 protrudes horizontally inwardly from the inner wall of the opening 12 for erecting the spacer 70 to divide the opening 12 into upper and lower portions. A water inlet 14 is laterally formed on one side of the base 10 and communicates with the upper portion of the opening 12, and a working fluid (not shown) is introduced into the pump through the inner hole 140 thereof: a water outlet 16 is laterally formed in the pump The same side of the base 10 and communicates with the lower portion of the opening 12, which discharges the working fluid from the pump through its inner bore 160.

The spacer 70 has a circular shape with a circular through hole 700 through which a working fluid passes. The spacer 70 abuts against the ridge 18 of the base 10 (as shown in FIG. 4), which flows the working fluid flowing from the water inlet 14 into the upper portion of the opening 12 and the working fluid flowing through the through hole 700 to the lower portion of the opening 12. Separate to avoid turbulence caused by mutual interference.

Referring to FIG. 4 together, the housing 20 has a square shape, which is fixed to the base 10 by screws, and a circular opening is formed in the middle portion thereof (not shown). a partition 2000 The port is separated from a first chamber 22 and a second chamber 2002. The first chamber 22 is located above the second chamber 2002 and is not in communication with each other to prevent the working fluid from penetrating into the first chamber 22 from the second chamber 2002. The first chamber 22 has an annular shape with an opening direction upward to accommodate the stator 30. The housing 20 is surrounded by a central portion of the first chamber 22 to form a circular shaft tube 220. The housing 20 surrounds an edge region of the first chamber 22 to form a side wall (not labeled). The height of the shaft tube 220 is slightly lower than the height of the side wall (as in Figure 4). The opening of the second chamber 2002 faces downwards for receiving the corresponding structure of the rotor 40. Referring to FIG. 4, the second chamber 2002 includes a circular first recess 24, an annular second recess 26 surrounding the first recess 24, and an annular third recess 28 surrounding the second recess 26. . The first recessed portion 24 is defined in the middle of the shaft tube 220, the second recessed portion 26 is defined in the shaft tube 220 and adjacent to the outer wall surface of the shaft tube 220, and the third recessed portion 28 is defined in the The inner wall of the side wall and adjacent to the side wall. The depths of the first recess 24, the second recess 26, and the third recess 28 are equal and greater than the depth of the first chamber 22. An annular groove (not labeled) surrounding the second chamber 2002 is defined in the bottom surface of the sidewall, and an elastic annular gasket 80 is embedded in the annular groove and abuts against the top surface of the base 10. In order to give the pump a better liquid sealing effect. One side of the side wall defines a notch 222 corresponding to the water inlet 14 and the water outlet 16 , and the notch 222 is in communication with the first chamber 22 for the wire of the circuit board 50 (not labeled).

Referring to FIG. 2 to FIG. 5 , the rotor 40 is sandwiched between the housing 20 and the base 10 , and includes an impeller group (not labeled), a rotating shaft 408 inserted in the middle of the impeller group, and a combination. An inner hub 404 to the impeller set and surrounding the rotating shaft 408 and A hub 406 extends from the edge of the impeller assembly vertically upwardly and around the inner hub 404. The impeller assembly further includes a circular plate (not shown) and a plurality of blades 402 coupled to the bottom of the circular plate. The impeller assembly is received within the upper portion of the opening 12 of the base 10 (Fig. 4), which disturbs the working fluid by the rotation of the vane 402 to cause it to flow downward. The shaft 408 is perpendicular to the circular plate and is received by a bearing 46 in the first recess 24 of the housing 20 (as in FIG. 4) to axially position the rotor 40. The inner hub 404 is received in the second recess 26 of the housing 20, and the outer hub 406 is received in the third recess 28 of the housing 20 (as shown in FIG. 4), both of which include two annular shapes. a splint (not shown), wherein the two splints of the inner hub 404 are coaxially and collectively sandwich an inner permanent magnet 42 in the ring, and the two splints of the outer hub 406 are also coaxial and sandwich an annular outer permanent magnet. 44 is within it. As shown in FIG. 5, the outer magnet 44 and the inner magnet 42 each have a plurality of N poles 422, 440 and S poles 420, 442 which are evenly distributed and alternate with each other, wherein the magnetic poles 440, 442 of the outer magnet 44 and the inner magnet 42 The magnetic poles 420, 422 of opposite polarities are aligned one by one, that is, the N pole 440 of the outer magnet 44 is opposite to the S pole 420 of the inner magnet 42, and the S pole 442 of the outer magnet 44 is opposite to the N pole 422 of the inner magnet 42. When the stator 30 is energized, the internal diplomatic magnetic field generated by it can act on the inner magnet 42 and the outer magnet 44, respectively, thereby collectively pushing the rotor 40 to rotate.

The stator 30 is received in the first chamber 22 of the outer casing 20, and is electrically connected to the circuit board 50 to be excited by an electric current to generate an alternating magnetic field. The stator 30 includes a plurality of parallel yoke sheets (not labeled) stacked on each other, wherein each yoke includes an annular outer frame 32, and a plurality of teeth formed from the outer frame 32 radiating inwardly 34 (Fig. 3) and a plurality of positioning portions 38 respectively coupled to the ends of the teeth 34. A plurality of exciting coils 36 are wound around the teeth 34 to magnetize the yokes to generate a strong magnetic field. The number of teeth 34 of the stator 30 is equal to the number of magnetic poles 420, 422, 440, 444 of the inner magnet 42 or the outer magnet 44, and each tooth portion 34 is magnetized to a magnetic pole of opposite polarity after the coil 36 is energized. (Fig. 5), wherein a magnetic field generated by one of the magnetic poles located outside the tooth portion 34 acts on the opposite magnetic poles 440, 442 of the outer magnet 44, so that the outer magnet 44 generates a magnetic moment perpendicular to the direction of the paper surface; The magnetic field generated by the other magnetic pole on the inner side of the inner magnet 42 acts on the opposite magnetic poles 420, 422 of the inner magnet 42 to produce an inner magnetic moment in the same direction as the outer magnetic moment. Since the inner magnetic moment is the same as the outer magnetic moment, the two together drive the rotor 40 to rotate to obtain a higher rotational speed. The width of the positioning portion 38 is larger than the width of the tooth portion 34 to more uniformly distribute the magnetic field inside the stator 30.

The circuit board 50 has a substantially circular shape, and a circular hole (not shown) is formed in a middle portion thereof, and one side thereof has a wire communicating with an external circuit (not shown). The circuit board 50 is placed on the stator 30 (as shown in FIG. 4), and the wires pass through the notch 222 of the casing 20, and the circular holes are inserted into the shaft tube 220 of the casing 20 to make The circuit board 50 is placed on the shaft tube 220, and the top surface of the circuit board 50 is flush with the top surface of the shaft tube 220 (Fig. 4).

The cover plate 60 has a square shape and is fixed to the casing 20 by screws to form an integral with the casing 20 and the base 10 as shown in FIG. The cover plate 60 covers the circuit board 50 to protect components located inside the housing 20.

When the circuit board 50 is energized, it delivers current into the stator 30 to excite the stator. 30, causing an alternating magnetic field on both the inner and outer sides. Since the inner magnet 42 and the outer magnet 44 of the rotor 40 are respectively disposed on the inner and outer sides of the stator 30, the two can be respectively driven by the internal and external magnetic fields generated by the stator 30 to rotate in the same direction, thereby jointly rotating the rotor 40. Therefore, the magnetic field generated by the stator 30 of the pump of the present invention can be sufficiently utilized as compared with the conventional pump, which can simultaneously drive the inner magnet 42 and the outer magnet 44 of the rotor 40 to obtain a higher rotational speed of the rotor 40. In turn, the working efficiency of the pump is improved.

As shown in FIG. 6, it can be understood that the magnetic poles 420, 422 of the inner magnet 42 and the outer magnet 44 can be overcome in order to overcome the "dead point" phenomenon in the conventional pump that causes the rotor 40 to fail to self-start due to poor design. 440, 442 are offset from each other by a certain angle, so that the magnetic fields generated by the two are in a non-positive state.

It will also be appreciated that the design of the dual magnets of the present invention is not limited to use in pumps, but may be extended to other related fields, such as fans or generators.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

34‧‧‧ teeth

42‧‧‧ Inner magnet

420, 442‧‧‧S pole

422, 440‧‧‧N pole

44‧‧‧External magnet

Claims (14)

A pump for a liquid cooling heat dissipation system includes a housing and a stator and a rotor housed in the housing, the rotor including a magnet surrounding the stator, wherein the rotor further includes a stator Surrounding the inner magnet, a partition separating the stator and the rotor is formed in the casing, and the inner magnet and the outer magnet of the rotor respectively comprise magnetic poles of alternating polarity, the number of magnetic poles of the inner magnet is equal to the number of magnetic poles of the outer magnet . The pump of claim 1, wherein the magnetic poles of the inner magnet and the outer magnets are different in polarity. The pump of claim 1, wherein the magnetic pole of the inner magnet is different from the polarity of the outer magnet by a magnetic pole staggered angle. The pump of claim 2, wherein the stator comprises a plurality of teeth equal to the number of magnetic poles of the outer magnet, each tooth being magnetized to have opposite poles of opposite polarity. The pump of any one of claims 1 to 3, wherein the rotor further comprises an impeller group, a rotating shaft vertically inserted into the impeller group, a coupling to the impeller group, and surrounding the rotating shaft and housing the inner magnet The inner hub and the outer hub are coupled to the impeller assembly and surround the inner hub and receive the outer magnet therein. The pump of claim 5, wherein the partition partitions the interior of the housing from the first chamber with the opening upward and the second chamber with the opening facing downward, the stator being housed in the first chamber . The pump of claim 6, wherein the housing is the first chamber The surrounding portion forms a shaft tube, and the portion of the housing surrounding the first chamber forms a side wall having a height lower than the height of the side wall. The pump of claim 7, wherein the second chamber comprises a circular first recess, a second recess surrounding the first recess, and a third recess surrounding the second recess, the rotor The rotating shaft is received in the first recess, the inner hub is received in the second recess, and the outer hub is received in the third recess. The pump of claim 8, wherein the first recess is formed in an inner portion of the shaft tube, the second recess is formed in a portion of the shaft tube near the outer side, and the third recess is formed in a portion of the side wall adjacent to the inner side. The pump of claim 5, wherein the pump further comprises a base fixed to the lower portion of the housing, wherein the base defines a circular opening for receiving the rotor group of the rotor, and one side of the base is opened The opening communicates with one of the water inlet and one water outlet. The pump of claim 10, wherein a middle portion of the opening of the base protrudes horizontally inwardly, and the rib is located between the water inlet and the water outlet. The pump of claim 11, wherein the pump further comprises a circular perforated gasket and an annular gasket disposed on the rib to separate the water outlet from the water inlet. The gasket is embedded in the housing and resiliently abuts the base. The pump of claim 1, wherein the pump further comprises a circuit board and a cover plate, the circuit board is disposed on the partition plate and electrically connected to the stator, the cover plate is fixed on the casing and covered Live on the board. A pump for a liquid cooling heat dissipation system includes a housing and a stator and a rotor housed in the housing, the rotor including a magnet surrounding the stator, wherein the rotor further includes a stator Inner magnet, inside the housing Forming a partition separating the stator and the rotor, the pump further comprising a circuit board and a cover plate, the circuit board is disposed on the partition plate and electrically connected to the stator, the cover plate is fixed on the housing and covers Circuit board.