CN1746468A - The liquid-cooled radiating system micropump - Google Patents

Abstract

A micropump for a liquid-cooled heat dissipation system, which includes a casing, an impeller set assembled in the casing, and a drive unit for driving the impeller set. The casing is provided with an input portion for liquid input and an output portion for liquid The output part of the impeller, the impeller is assembled with a first permanent magnet, and the first permanent magnet is provided with a number of N poles and S poles in a staggered arrangement, wherein a baffle is provided in the housing, and the baffle connects the impeller group with the The drive unit is separated. The drive unit includes a motor and a second permanent magnet driven by the motor. The second permanent magnet is provided with a number of staggered N poles and S poles opposite to the first permanent magnet. The liquid can flow out from the output part of the supporting part without passing through the base on which the motor is installed. In this way, the circuit part of the motor does not need to be immersed in the liquid, and the electrical insulation requirement of the motor circuit board is reduced, and the production cost is reduced.

Description

Liquid Cooling System Micro Pump

【Technical field】

The invention relates to a micropump, in particular to a micropump of a liquid-cooled heat dissipation system.

【Background technique】

Generally, electronic products with a heat source need a heat dissipation system. For example, a computer is equipped with a central processing unit (CPU). Since the CPU generates heat during operation, a cooling device must be installed on the CPU to prevent the CPU from overheating.

In the existing computer CPU heat dissipation device, the liquid-cooled heat dissipation system has a tendency to be widely used gradually. In order to make the cooling liquid circulate inside the liquid-cooled heat dissipation system, a pump is generally installed, and the pump is used to control the cooling liquid. Thrust is generated to circulate the coolant, so that the coolant can take away the heat of the CPU. However, the structure of the traditional pump is generally submerged. The circuit part of the pump motor needs to be immersed in the coolant, so it is necessary for motor insulation manufacturing There are extremely high requirements and high costs.

【Content of invention】

The technical problem to be solved by the invention is to provide a low-cost liquid-cooled heat dissipation system micropump.

In order to solve the above-mentioned technical problems, the micropump of the liquid-cooled heat dissipation system of the present invention includes a housing, an impeller group assembled in the housing and a drive unit for driving the impeller group, the housing is provided with an input part for liquid input and An output part for liquid output, the impeller is assembled with a first permanent magnet, and the first permanent magnet is provided with a number of N poles and S poles in a staggered arrangement, wherein a baffle is provided in the housing, and the baffle will The impeller set is separated from the drive unit, the drive unit includes a motor and a second permanent magnet driven by the motor, the second permanent magnet is provided with a number of staggered N poles and S poles opposite to the first permanent magnet .

Compared with the prior art, the present invention sets a partition for separating the base from the motor in the accommodation chamber of the micropump base, and the liquid can flow from the output part of the base without passing through the accommodation chamber where the motor is installed. In this way, the electrical circuit parts of the motor do not need to be immersed in the liquid, whereby the electrical insulation requirements of the motor circuit board are reduced and the production costs are reduced.

【Description of drawings】

Fig. 1 is a three-dimensional exploded view of a micro-pump of a liquid-cooled heat dissipation system of the present invention.

Fig. 2 is a three-dimensional assembled view of the micro pump of the liquid cooling heat dissipation system of the present invention.

FIG. 3 is a sectional view of FIG. 2 .

Fig. 4 is a sectional view of the second embodiment of the present invention.

【Detailed ways】

Please refer to Figures 1 to 3, the liquid-cooled heat dissipation system micropump of the present invention includes a housing 1, an impeller set 2 assembled in the housing 1, and a drive unit 3, wherein the impeller set 2 is driven by the drive unit 3 And rotate.

The casing 1 includes a base body 11 and a cover body 10 buckled with the base body 11 .

The cover body 10 is provided with an opening (not labeled) and an input portion 104 for inputting liquid. One end of the opening is provided with an annular groove 106 for engaging a gasket 108 to prevent liquid from leaking out.

The seat body 11 is provided with an upper opening end 101 which cooperates with the opening of the cover body 10 to form an integral body, and one side of the seat body 11 is provided with an output part 110 for liquid output, and a partition plate 12 and a baffle plate 14 are arranged inside the seat body 11, wherein The partition 12 is a detachable partition, and the baffle 14 is integrally formed with the seat body 11 and cannot be disassembled. The partition 12 and the baffle 14 divide the housing 1 into three cavities. The first cavity above the partition 12 is the water inlet chamber 16, and the second cavity between the partition 12 and the baffle 14 is The cavity is the water outlet chamber 17 , wherein the impeller set 2 is accommodated in the water outlet chamber 17 , and the third cavity located under the baffle 14 is the accommodation chamber 18 for accommodating the drive motor 2 . Wherein, a shaft hole 120 is provided at the center of the partition 12 , a plurality of through holes 122 are provided around the shaft hole 120 for liquid circulation, and a shaft seat 140 is provided upward at the center of the baffle plate 14 .

The impeller assembly 2 includes a shaft 20 inserted into the shaft seat 140 and passing through the shaft hole 120 , a bearing 22 sleeved on the shaft 20 , a retaining ring 24 and an impeller 26 sleeved around the bearing. The impeller 26 is provided with a first permanent magnet 260 inside, and the first permanent magnet 260 is in a flat circular shape, and has a plurality of N poles and S poles arranged alternately in a ring.

The driving unit 3 includes a motor 30 and a second permanent magnet 340 driven by the motor 30 . The motor 30 includes a circuit board 31 , a shaft 32 and a rotor 34 sleeved on the shaft 32 . The periphery of the rotor 34 is covered by a magnetically permeable shell, and the second permanent magnet 340 is magnetically adsorbed on the shell. The shape of the second permanent magnet 340 is similar to that of the first permanent magnet 260 on the impeller 26. 260 , a number of N poles and S poles arranged alternately in a ring form opposite to 260 , and the second permanent magnet 340 forms an axial air gap with the first permanent magnet 260 in the impeller 2 .

The impeller set 2 , drive unit 3 and cover 10 are assembled on the base 11 , the liquid flows into the water inlet chamber 16 from the input portion 104 of the cover 10 and then flows into the water outlet chamber 17 through the through hole 122 on the partition 12 . The motor 3 drives the second permanent magnet 340 to rotate around the axis 32 through the rotor 34. Since the N pole and the S pole of the second permanent magnet 340 are opposite to the N pole and the S pole of the first permanent magnet 260 of the impeller 26, according to the same According to the principle of pole repulsion, the second permanent magnet 340 will push the first permanent magnet 260 of the impeller 26 to rotate around the rotating shaft 20, and then drive the impeller 26 to rotate. Through the continuous rotation of the impeller 26, the liquid can be sent out from the output part 110.

Since the drive unit 3 is not connected to the impeller set 2 , the liquid will not flow into the drive unit 3 and contact the circuit board 31 of the motor 30 during the delivery process of the micro pump. As a result, the electrical insulation requirements of the circuit board 31 of the motor 30 are reduced, and the production costs are reduced.

As shown in Figure 4, it is a sectional view of the second embodiment of the present invention, the second permanent magnet 340' of the drive unit 3' in the second embodiment is different from the first permanent magnet 260' on the impeller 26' in shape and structure In the first embodiment, the two corresponding second permanent magnets 340 and first permanent magnets 260, wherein the second permanent magnets 340' and the first permanent magnets 260' are hollow cylindrical, and the two form a radial air gap, so the first The two permanent magnets 340' and the first permanent magnet 260' do not generate axial force. The partition 12 in the second embodiment is provided with a protrusion 122' facing the rotating shaft 20' in the center, and the function of the protrusion 122' is equivalent to the buckle 24 in the first embodiment. Since the rotation of the impeller 26' will generate pressure, so The side of the impeller 26' close to the motor 30' will be subjected to the axial pressure of the liquid, so the protrusion 122' on the partition 12' is used for axial positioning of the impeller 26'.

Claims (10)

1. liquid-cooled radiating system micropump, it comprises a housing, be assembled in the impeller sets in the housing and drive the driver element of this impeller sets, this housing is provided with the input part that can import for liquid and the carry-out part that can export for liquid, this impeller sets is equiped with first permanent magnet, this first permanent magnet is provided with the some staggered N utmost point and S utmost points of being, it is characterized in that: be provided with a baffle plate in this housing, this baffle plate separates this impeller sets and this driver element, this driver element comprises that a motor reaches second permanent magnet by motor driven, and this second permanent magnet is provided with some the be staggered N utmost point and the S utmost points relative with first permanent magnet.

2. liquid-cooled radiating system micropump as claimed in claim 1 is characterized in that: this housing comprises a pedestal and the lid that fastens with it, and the baffle plate one is located in the pedestal.

3. liquid-cooled radiating system micropump as claimed in claim 2 is characterized in that: impeller sets places between baffle plate and the lid, and driver element places the baffle plate opposite side, liquid input part and carry-out part and impeller sets place spatial communication.

4. liquid-cooled radiating system micropump as claimed in claim 3 is characterized in that: this impeller sets comprise one be positioned on the baffle plate rotating shaft, be sheathed on the bearing in the rotating shaft and be sheathed on the impeller of bearing periphery, first permanent magnet places impeller inside.

5. liquid-cooled radiating system micropump as claimed in claim 4 is characterized in that: described first and second permanent magnet is the flat annular and is provided with, and two permanent magnets form axial air-gap.

6. liquid-cooled radiating system micropump as claimed in claim 4 is characterized in that: described first and second permanent magnet is cylindric, and two permanent magnets form radial air gap.

7. liquid-cooled radiating system micropump as claimed in claim 4, it is characterized in that: this housing is further established a dividing plate, impeller sets place separated by spaces become the water-supplying chamber between dividing plate and baffle plate and be positioned at the intake chamber of dividing plate opposite side, the liquid input part is communicated with intake chamber, the liquid carry-out part is communicated with water-supplying chamber, and this dividing plate is provided with the through hole of circulation for liquid.

8. liquid-cooled radiating system micropump as claimed in claim 7 is characterized in that: these dividing plate central authorities are provided with a projection that is used for the axially locating impeller.

9. liquid-cooled radiating system micropump as claimed in claim 7 is characterized in that: these dividing plate central authorities are provided with an axis hole that allows rotating shaft pass, and are equiped with the clasp of axially locating rotating shaft in this rotating shaft.

10. liquid-cooled radiating system micropump as claimed in claim 1 is characterized in that: motor rotor is established a magnetic conductivity shell, and second permanent magnet is adsorbed on this shell.

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