TWI470153B - Micro liquid pump unit, micro liquid pump module and electronic apparatus - Google Patents

Description

Micro liquid pump unit, micro liquid pump module and electronic device

The invention relates to a micro liquid pump unit, a micro liquid pump module and an electronic device.

Since the current electronic devices are moving toward thinner and lighter, and many functions need to be added in the electronic device, the degree of accumulation of the chips and the density of electronic components on the circuit board are greatly increased, which leads to an increase in heat dissipation requirements of the electronic device. However, achieving higher efficiency than ever before in a thin and light electronic device is a problem that the industry needs to solve. At present, although most of the heat dissipation is achieved by a fan, the use of liquid for heat dissipation can achieve greater effects.

FIG. 1 and FIG. 2 are respectively a combined diagram and an exploded view of a conventional motor liquid pump disclosed in Taiwan Patent No. 200743738. As shown in FIG. 1 and FIG. 2, a rotary disc type motor liquid pump is disclosed, that is, combined in a disk shape. The motor liquid pump has an inlet 11 and an outlet 12 and has an impeller 2 such that a liquid can enter through the inlet 11 and exit from the outlet 12 via the impeller 2. The heat dissipation function is achieved by circulation of the liquid.

However, conventional motor liquid pumps have the following disadvantages:

1. Since the blades of the impeller have a certain thickness and width, the motor liquid pump occupies a considerable area and is not easily thinned. In addition, since the conventional motor liquid pump is composed of a layer stack, and some thickness is added, the conventional motor liquid pump is difficult to be disposed in the thin and light electronic device, thereby reducing the application level.

2. Since it is a rotating disc type, when the impeller is actuated to rotate the liquid, the interface between the rotating and non-rotating surfaces (corresponding to the area of the impeller 2) is too large, and the gap between the rotating and non-rotating (ie, the impeller 2 and the cover body) The inner wall is too small, causing a large increase in the viscous force, which reduces the work efficiency of the motor liquid pump, which in turn leads to a decrease in heat dissipation performance.

Therefore, how to provide a micro liquid pump unit, which can improve the heat dissipation performance and is applied to a thin and light electronic device, is one of the current important topics.

In view of the above problems, an object of the present invention is to provide a micro liquid pump unit, a micro liquid pump module, and an electronic device that can improve heat dissipation performance and are applied to a thin and light electronic device.

To achieve the above object, a microfluidic pump unit according to the present invention comprises a micromotor, a spiral blade, an inlet port and an outflow port. The micromotor has an axis. The spiral blade is coupled to the micro motor, and the helical blade rotates by the rotation of the axis of the micro motor. The inlet is used to allow a liquid to enter. The liquid enters through the inlet port and is driven by the spiral blade to flow out from the outlet port.

In an embodiment, the helical blade is coupled to the axis.

In one embodiment, the helical blade is coupled to the shaft by an adapter element. The adapter element can be sleeved with an axis, and the helical blade is coupled to one of the axes of the adapter element.

In an embodiment, the micro liquid pump unit further includes a casing disposed around the spiral blade, and the inlet port and the outlet port are disposed on the casing. The housing can be coupled to one of the housings of the micromotor. In addition, the micro liquid pump unit may further include a bearing connected to the shaft of the housing and the micro motor.

In an embodiment, the micro fluid pump unit further includes a housing and a bearing. The housing is disposed around the spiral blade, and the inlet port and the outlet port are disposed on the casing. The bearing is coupled to the housing and the adapter element.

In one embodiment, the micro liquid pump unit further includes a centrifugal blade coupled to the micro motor to rotate the centrifugal blade by the rotation of the axis of the micro motor, and the centrifugal blade is disposed corresponding to the outflow port.

In an embodiment, the centrifugal blade is coupled to the shaft.

In an embodiment, the micro fluid pump unit further includes an adapter element and a centrifugal blade. The adapter element is coupled to the axis of the micromotor. The centrifugal vane is connected to one of the axis of the adapter element, or one of the body of the adapter element, or the shaft of the micromotor, and is provided corresponding to the outlet port.

To achieve the above object, the present invention further discloses a micro liquid pump module comprising a plurality of micro fluid pump units as described above and a series flow path. The micro liquid pump unit is disposed corresponding to the series flow channel system such that a liquid flows sequentially through one of the micro liquid pump units and flows along the series flow path through the other of the micro liquid pump units.

To achieve the above object, the present invention further discloses an electronic device comprising the micro fluid pump module as described above and a heat source. a heat source is disposed between the series flow channel and two of the micro liquid pump units such that a liquid sequentially flows through one of the micro liquid pump units and flows along the series flow path through the heat source And another of the micro fluid pump units.

In one embodiment, the electronic device further includes a heat exchange unit disposed at a position behind the heat source with respect to the flow direction of the liquid and lowering the temperature of the liquid.

According to the above description, the micro liquid pump unit of the present invention couples a spiral blade to the axis of the micro motor, and the spiral blade can extend the time and the path of the torque of the motor to the liquid, thereby obtaining the liquid. Greater thrust. In addition, the thickness and width of the spiral blade are smaller than those of the general blade, which is advantageous for the thinning of the product. In addition, because it is a spiral blade instead of a conventional impeller, it can greatly reduce the interface area of liquid rotation and non-rotation, and can increase the liquid rotation in the width direction while the thickness of the micro liquid pump unit is constant. With the non-rotating gap, this reduces the viscous force, which makes the work efficiency of the micro liquid pump unit increase, and thus the heat dissipation performance is improved.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a micro fluid pump unit, a micro fluid pump module, and an electronic device according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings, wherein the same elements will be described with the same reference numerals.

3 is a schematic view of a micro liquid pump unit 3 according to a preferred embodiment of the present invention. The micro liquid pump unit 3 includes a micro motor 31 and a spiral blade 32. The micromotor 31 has a shaft center 311 which is rotatable when the micromotor 31 is actuated. Since the micromotor 31 is a conventional technique, the details thereof will not be described herein. The micromotor 31 used in this embodiment may have a diameter of less than 1 cm.

The spiral blade 32 is coupled to the micro motor 31, and the helical blade 32 is rotated by the rotation of the axis 311 of the micro motor 31. The spiral direction of the spiral blade 32 is parallel to the direction of the axis 311, that is, the spiral blade 32 is spiraled in the direction of the axis 311. The spiral blade 32 can extend the time and the path of the motor torque acting on the liquid, thereby obtaining a larger thrust of the liquid while maintaining the thinning of the product. Here, the spiral blade 32 is coupled to the shaft center 311, and is integrally molded or injection molded, for example.

Of course, the micro-pump unit 3 further includes an inflow port for allowing a liquid to enter, a liquid inlet through the inflow port, and a flow through the spiral vane to flow out from the outflow port. The inlet port and the outlet port can have various configurations. For example, when the micro liquid pump unit 3 is placed in the first-class channel, the flow channel wall can form an inlet port, and the tail end of the spiral blade 32 can be formed. Stream.

Alternatively, as shown in FIG. 4, another aspect of the micro fluid pump unit 3a may further include a casing 33 disposed around the spiral blade 32, and the inlet port 34 and the outflow port 35 are disposed in the casing. 33. Here, the casing 33 is coupled to the outer casing of the micromotor 31, and may be coupled by, for example, welding, snapping, locking, or bonding, or other joining methods, or two or more of the above. Further, as shown in FIG. 5, the casing 33 of the microfluid pump unit 3a covers the entire micromotor 31. Of course, considering the need for power supply by the micromotor 31, the housing 33 can be perforated for passage of the wires, or the housing 33 can be perforated to make replacement of the battery easier. Further, if it is not desired to allow the liquid to enter the range of the micromotor 31, a stopper may be provided between the casing 33 and the micromotor 31 near one end of the blade 32, and the stopper may also serve as the coupling housing 33 and the micromotor 31.

In addition, as shown in FIG. 6, another aspect of the microfluid pump unit 3b may further include a bearing 36 connected to the shaft 311 of the housing 33 and the micromotor 31. Here, the micro fluid pump unit 3b includes two bearings 36 located at the beginning and the end of the shaft 311, respectively. By the bearing 36, the casing 33 can be coupled and supported on both ends of the shaft 311, and the other side can rotate the shaft 311, and the casing 33 does not rotate. In addition, the housing 33 may also be extended to cover the micro motor 31.

Another microfluidic pump unit 3c is shown in Fig. 10, which differs from the above aspect in that the microfluid pump unit 3c further includes a centrifugal vane 38. As the name implies, the centrifugal vanes 38 are centrifugally actuated blades. The centrifugal vane 38 is coupled to the micromotor 31, and the centrifugal shaft 38 is rotated by the rotation of the shaft 311 of the micromotor 31. Here, the centrifugal blade is directly coupled to the shaft center 311 and is driven by the micromotor 31. The centrifugal vanes 38 are arranged corresponding to the outflow opening. In addition, the radius of the centrifugal vane 38 and the helical vane 32 are substantially equal; of course, the radius of the two may not be equal depending on the actual application.

The centrifugal vanes 38 provide a suction-liquid suction that cooperates with the thrust provided by the helical vanes 32 to the liquid, which complement each other and has a multiplier effect on the drive of the liquid. It has been verified that the speed of the liquid outlet can be greatly increased by the centrifugal vanes 38.

Fig. 11 shows another embodiment of the microfluid pump unit 3d. The aspect of Fig. 11 can be regarded as the microfluid pump unit of Fig. 4 plus a centrifugal vane. As shown in FIG. 11, the centrifugal vane 38 is coupled to the shaft center 311 and disposed corresponding to the outflow port 35. When the liquid enters the microfluid pump unit 3d from the inlet port 34, that is, it is driven by the thrust of the spiral blade 32, and when it is close to the centrifugal blade 38, it is driven by the suction of the centrifugal blade 38 to directly exit. The flow port 35 is discharged, thereby greatly increasing the outflow speed. Here, the spiral blade 38 is disposed at one end of the shaft 311 away from the body 312 of the micro motor 31.

Fig. 12 shows another embodiment of the microfluid pump unit 3e. The main difference from the embodiment shown in Fig. 11 is that the centrifugal vane 38 of the microfluid pump unit 3e is disposed on the shaft 311 near the body 312 of the micromotor 31. One end. The centrifugal vanes 38 are still arranged corresponding to the outflow opening 35.

Referring to FIG. 7, another micro liquid pump unit 4 according to a preferred embodiment of the present invention includes a micro motor 41 and a spiral blade 42. The micromotor 41 has an axis 411. The main difference from the above embodiment is that the spiral blade 42 of the micro liquid pump unit 4 is not directly coupled to the shaft center 411, but is coupled to the shaft center 411 by an adapter member 47. The adapter element 47 can have a variety of variations, where the adapter element 47 is sleeved with the axis 411 and the helical blade 42 is coupled to one of the axes 471 of the adapter element 47. The diameter of the axis 471 of the adapter member 47 can be larger than the diameter of the axis 411 of the micro motor 41, whereby the spiral blade 42 can be coupled to the shaft 471 which is thicker than the motor shaft 411 to obtain a larger structure. The strength extends the life of the helical blade 42. In addition, the application level and utility of the micro fluid pump unit 4 can also be increased by different switching elements 47.

In addition, as shown in FIG. 8 , the micro liquid pump unit 4 may further include a casing 43 disposed around the spiral blade 42 , and the inlet port 44 and the outlet port 45 are disposed on the casing 43 . The microfluidic pump unit 4 may further include a bearing 46 coupled to the housing 43 and the adapter member 47. Here, the micro fluid pump unit 4 includes two bearings 46, one of which is connected to the housing 43 and the adapter member 47, and the other bearing 46 is located at the end of the shaft 471 and is coupled to the housing 43 and the shaft 471. The housing 43 can be coupled to and supported by the adapter member 47 and the shaft 471 by the bearing 46. When the other side can rotate the shaft 411 and the shaft 471, the housing 43 does not rotate. In addition, the housing 43 may also be extended to cover the micro motor 41.

The adapter elements shown in Figures 7 and 8 are merely illustrative and are not intended to limit the invention. Here, the switching element can be divided into two parts, that is, a body and an axis, each having a different radius; and in other embodiments, the switching elements can have only the same radius.

Figure 13 shows another embodiment of the micro-pump unit 4a, which differs from the embodiment shown in Figure 8 in that the micro-pump unit 4a further includes a centrifugal blade 48. The technical features of the centrifugal blade 48 are as described above. The centrifugal vanes 38 are identical and will not be described again here. The centrifugal vane 48 can be coupled to one of the axis 471 of the adapter member 47, or one of the body 472 of the adapter member 47, or the shaft 411 of the micromotor 41; here, the centrifugal blade 48 is coupled to the adapter member 47. The axis 471 is connected as an example and is provided corresponding to the outflow port 45.

FIG. 9 is a schematic diagram of a micro fluid pump module applied to an electronic device according to a preferred embodiment of the present invention. The micro liquid pump module comprises a plurality of micro liquid pump units P1 and P2 as described above and a series flow path FC, and the micro liquid pump units are arranged corresponding to the series flow path FC, for example, the micro liquid pump unit is arranged in the series flow. The channel FC is disposed adjacent to or adjacent to the series flow channel FC such that a liquid sequentially flows through one of the micro liquid pump units P1 and flows along the series flow path through the other P2 of the micro liquid pump unit. . The microfluid pump units P1, P2 may be selected from any of the foregoing microfluid pump units. The series flow path FC may be, for example, a flow path composed of a tubular body or limited by two or more members.

The micro fluid pump module is applied to an electronic device, and the electronic device has a heat source H disposed between the series flow channel FC and two of the micro liquid pump units (for example, P1, P2), so that A liquid sequentially flows through one of the microfluid pump units (e.g., P1) and flows along the series flow path through the heat source and another one of the microfluid pump units (e.g., P2).

The liquid flows in the series flow path FC and is accelerated by the work of the micro liquid pump unit P1. The liquid can enter from the inlet of the micro liquid pump unit P1, and is driven by the rotation of the spiral blade, and then flows out from the outlet of the micro liquid pump unit P1. Then, the liquid passes through the heat source H, and the heat of the heat source H is taken away, so that the temperature of the liquid rises. Thereafter, the liquid is accelerated by the work of the microfluid pump unit P2. The liquid can enter from the inlet of the micro liquid pump unit P2, and is driven by the rotation of the spiral blade, and then flows out from the outlet of the micro liquid pump unit P2.

In addition, the electronic device may further include a heat exchange unit C disposed at a position behind the heat source H with respect to the flow direction of the liquid, and lowering the temperature of the liquid. When the liquid carrying away heat passes through the heat exchange unit C, heat exchange can be performed to lower the temperature of the liquid. The heat exchange unit C may, for example, comprise a fan, a heat exchange material, or other substance or structure that is capable of heat exchange.

As such, the flow of liquid can form a closed loop. The micro fluid pump module can be applied to an electronic device having a long series flow path by a plurality of micro liquid pump units, such as a flat electronic device such as a flat panel television. In the above micro liquid pump module, the number of the micro liquid pump units is described by taking two examples, which may of course be other numbers. In addition, the number of heat source H and heat exchange unit C can also be adjusted according to actual conditions or needs. In addition, the positions of the micro liquid pump units P1, P2, the heat source H, and the heat exchange unit C shown in FIG. 9 are merely exemplified, and the relative positions thereof may be adjusted as appropriate.

In summary, the micro liquid pump unit of the present invention couples a spiral blade to the axis of the micro motor, and the spiral blade can extend the time and the path of the torque of the motor to the liquid, thereby obtaining the liquid. Greater thrust. In addition, the thickness and width of the spiral blade are smaller than those of the general blade, which is advantageous for the thinning of the product. In addition, because it is a spiral blade instead of a conventional impeller, it can greatly reduce the interface area of liquid rotation and non-rotation, and can increase the liquid rotation in the width direction while the thickness of the micro liquid pump unit is constant. With the non-rotating gap, this reduces the viscous force, which makes the work efficiency of the micro liquid pump unit increase, and thus the heat dissipation performance is improved.

The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of the invention are intended to be included in the scope of the appended claims.

11. . . Entrance

12. . . Export

2. . . impeller

3, 3a, 3b, 3c, 3d, 3e, 4, 4a, P1, P2. . . Micro liquid pump unit

31, 41. . . Micro motor

311, 411, 471. . . Axis

312, 472. . . Ontology

32, 42. . . Spiral blade

33, 43. . . case

34, 44. . . Inlet

35, 45. . . Outlet

36, 46. . . Bearing

38, 48. . . Centrifugal blade

47. . . Transfer element

C. . . Heat exchange unit

FC. . . Series flow path

H. . . Heat source

1 and 2 are respectively a combined diagram and an exploded view of a conventional motor liquid pump;

3 to FIG. 6 and FIG. 10 to FIG. 12 are schematic diagrams showing different aspects of a micro liquid pump unit according to a preferred embodiment of the present invention;

7 and FIG. 8 and FIG. 13 are schematic views showing different aspects of another micro liquid pump unit according to a preferred embodiment of the present invention;

FIG. 9 is a schematic diagram of a micro fluid pump module applied to an electronic device according to a preferred embodiment of the present invention.

3. . . Micro liquid pump unit

31. . . Micro motor

311. . . Axis

32. . . Spiral blade

Claims (14)

A micro-pump pump unit comprising: a micro-motor having an axial center; a helical blade coupled to the micro-motor, the helical blade rotating by the axis of the micro-motor; an inflow a port for allowing a liquid to enter; an outlet, the liquid enters through the inlet port, and is driven by the spiral blade to flow out through the outlet port; and a centrifugal blade coupled to the micro motor The centrifugal blade is rotated by the rotation of the shaft of the micro motor, and the centrifugal blade is disposed corresponding to the outlet. The micro fluid pump unit of claim 1, wherein the spiral blade is coupled to the shaft center. The micro fluid pump unit of claim 1, wherein the spiral blade is coupled to the shaft by an adapter element. The micro fluid pump unit of claim 3, wherein the adapter element sleeves the shaft, and the spiral blade is coupled to one of the axis of the adapter element. The micro fluid pump unit of claim 1, further comprising: a casing disposed around the spiral blade, wherein the inlet port and the outlet port are disposed on the casing. The micro fluid pump unit of claim 5, wherein the housing is coupled to one of the micromotor housings. For example, the micro liquid pump unit described in claim 5 of the patent scope further includes: A bearing is coupled to the housing and the axis of the micromotor. The micro fluid pump unit of claim 3, further comprising: a casing disposed around the spiral blade, wherein the inlet port and the outlet port are disposed on the casing; and a bearing coupled to the housing and the adapter member. The micro fluid pump unit of claim 1, wherein the centrifugal blade is coupled to the shaft via an adapter element. The micro fluid pump unit of claim 1, wherein the centrifugal blade is coupled to the shaft. The micro fluid pump unit of claim 9, wherein the centrifugal blade is fixed to the adapter element. A micro fluid pump module comprising a plurality of micro fluid pump units according to any one of claims 1 to 11 and a series flow channel, the micro fluid pump unit and the series flow channel Correspondingly, a liquid is sequentially flowed through one of the micro liquid pump units and flows along the series flow path through the other of the micro liquid pump units. An electronic device comprising: a micro fluid pump module according to claim 12; and a heat source disposed between the series flow channel and two of the micro liquid pump units A liquid is sequentially passed through one of the microfluid pump units and flows along the series flow path through the heat source and the other of the microfluid pump units. The electronic device of claim 13, further comprising: a heat exchange unit disposed at a position relative to a flow direction of the liquid It is located after the heat source and lowers the temperature of the liquid.