JP2003161284A - Thin vortex pump and cooling system provided therewith - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thin vortex pump capable of being thinned and simplified in structure to obtain a lower cost and a cooling system provided therewith. <P>SOLUTION: This vortex pump comprises an impeller 1 comprising a number of blades formed at the external periphery of the impeller and a rotor magnet 3 provided at the internal periphery thereof; a motor stator 4 provided at the internal periphery of the rotor magnet 3; and a pump casing for airtightly partitioning the impeller 1 from the motor stator 4, which comprises an intake port and a discharge port. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thin swirl pump and a cooling system including the same.

[0002]

2. Description of the Related Art In recent years, a cooling system that efficiently cools electronic parts such as a CPU has been desired, and as a cooling method corresponding thereto, a refrigerant cooling system that circulates and cools a refrigerant has been drawing attention. Further, the refrigerant circulation pump of such a cooling system has many restrictions on the mounting space, and thus there is an increasing demand for reduction in size and thickness.

As a conventional small pump, Japanese Patent Laid-Open No. 2001-2001
There is a small centrifugal pump described in Japanese Patent No. 132699. The conventional small centrifugal pump will be described below with reference to FIG. FIG. 6 is a structural diagram of a conventional small centrifugal pump. 101 is an impeller, 102 is a fixed shaft that rotatably supports the impeller 101, 103 is an end of the fixed shaft 102 fixed, and the impeller 101 is stored. And at the same time impeller 101
A pump casing having a pump chamber for recovering the kinetic energy given to the fluid by the pressure and guiding it to the discharge port.
4 is a rear shroud forming a part of the impeller 101, 105
Is a front shroud that also forms a part of the impeller 101 and has a water absorption opening formed in the center of the impeller 101, 106 is a rotor magnet fixed to the rear shroud 104 of the impeller 101, and 107 is an inner peripheral side of the rotor magnet 106. Is a motor stator provided at, a waterproof partition 108 is provided between the rotor magnet 106 and the motor stator to seal the pump chamber, 109 is a suction port,
Reference numeral 110 is a discharge port.

The operation of this conventional centrifugal pump will be described. When electric power is supplied from an external power source, a current controlled by an electric circuit provided in the centrifugal pump flows through a coil of the motor stator 107, and a rotating magnetic field is generated. Occurs.
When this rotating magnetic field acts on the rotor magnet 106, a physical force is generated on the rotor magnet 106. By the way, since the rotor magnet 106 is fixed to the impeller 101, and the impeller 101 is rotatably supported by the fixed shaft 102, a rotational torque acts on the impeller 101, and the rotational torque acts on the impeller 101. Starts to rotate. The blade provided between the front shroud 105 and the rear shroud 104 of the impeller 101 is
Rotation causes the fluid to change its momentum, and the suction port 109
The fluid flowing in from receives kinetic energy from the impeller 101. Of course, if the flow passage area is expanded in the impeller 101 toward the blade outlet, the pressure will be partially recovered in the impeller 101. Impeller 10
The fluid flowing out of the blade outlet of No. 1 recovers the pressure of the kinetic energy given by the diffuser provided in the casing 103, and is guided to the discharge port 110.

As described above, in the conventional small centrifugal pump, the thin impeller is driven by the outer rotor system to reduce the size and thickness of the pump.

[0006]

However, in such a conventional small-sized centrifugal pump, since the pump chamber needs an axial suction portion in order to supply the fluid to the water absorption opening in the center of the impeller, the entire pump is required. This is an obstacle to reducing the length in the direction of the rotation axis and reducing the thickness.

Further, a vortex pump (also called a friction pump or a regenerative pump, hereinafter referred to as a vortex pump) suitable for thinning the structure that sucks in from the radial direction and discharges in the radial direction.
Is also known, even if the pump is a vortex pump,
Since the impeller is connected to the fixed shaft in the center, it has a disk shape, and a waterproof partition wall for sealing the pump chamber is required above and below the impeller, and the motor stator and the waterproof partition wall and the impeller overlap in the direction of the rotation axis. There was a limit.

[0008] Therefore, it is an object of the present invention to provide a thin vortex pump capable of realizing efficient cooling while achieving thinning.

It is another object of the cooling system of the present invention to provide a cooling system which can be thinned as a whole and which can realize efficient cooling.

[0010]

In order to solve this problem, the thin eddy current pump of the present invention comprises an impeller having a large number of blades formed on the outer circumference and a rotor magnet provided on the inner circumference, and an impeller. A shaft to be supported, a motor stator provided on the inner peripheral side of the rotor magnet, an impeller and a motor stator are airtightly partitioned, and a pump casing having a suction port and a discharge port is provided. .

As a result, it is possible to achieve efficient cooling while achieving thinning.

The cooling system of the present invention is characterized by including a cooler, a radiator, and the above-mentioned thin vortex pump.

As a result, the entire structure can be made thin and efficient cooling can be realized.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the present invention includes an impeller having a large number of blades formed on the outer periphery and a rotor magnet provided on the inner periphery, and a shaft for supporting the impeller.
A thin eddy current pump characterized by comprising a motor stator provided on an inner peripheral side of a rotor magnet, an impeller and a motor stator which are airtightly partitioned from each other, and a pump casing having a suction port and a discharge port. Therefore, by integrally forming the blade and the rotor magnet and inserting the motor stator therein, the length of the entire pump in the rotation axis direction can be made as small as possible, and the pump can be made thinner. In addition, by integrating the blade and the rotor magnet, the structure is simple and the cost can be reduced.

According to a second aspect of the present invention, the shaft is fixed to the pump casing, and the impeller rotates about the shaft, which is the thin eddy-current pump according to the first aspect. To fix the shaft to the pump casing,
It has the effect of improving the assemblability.

The invention according to claim 3 of the present invention is the thin swirl pump according to claim 2, characterized in that the shaft is formed integrally with the pump casing. Therefore, when the pump casing is molded, the shaft is insert-molded. Since it can be formed with
It has the effect of improving the assemblability. Further, since it can be formed of the same material as the pump casing, the number of parts can be reduced and the assemblability can be improved.

The invention according to claim 4 of the present invention is the thin eddy-current pump according to claim 1, characterized in that the shaft is provided rotatably with respect to the impeller and the pump casing, respectively. In addition, the friction caused by the sliding movement of the shaft and the impeller is reduced, and the pump has higher efficiency and longer life.

According to a fifth aspect of the present invention, the rotor magnet and the motor stator are arranged such that their magnetic centers are offset from each other, a thrust component is formed in the magnetic force, and the thrust load of the impeller is received by the thrust component. Since it is the thin eddy current pump according to any one of claims 1 to 4, the side face of the impeller can be rotated in a non-contact manner with the pump casing by receiving the thrust load with the magnetic bearing. Since it is possible to reduce the number of pumps, it is possible to further increase the efficiency and the life of the pump.

According to a sixth aspect of the present invention, since the shaft is fixed to the impeller and the pump casing is provided with a bearing, the thin eddy-current pump according to the first aspect is provided. Since the shaft is fixed to the vehicle, it has an effect of improving the assemblability.

The invention according to claim 7 of the present invention is the thin eddy-current pump according to claim 6, characterized in that the shaft is formed integrally with the impeller, and therefore the shaft is insert-molded at the time of molding the impeller. Since it can be formed by, for example, it has an effect of improving the assemblability. Further, since it can be formed of the same material as the impeller, it has the effect of reducing the number of parts and improving the assemblability.

The invention according to claim 8 of the present invention is the thin vortex pump according to any one of claims 1 to 7, characterized in that the impeller is integrally formed of a magnetic material.
By constructing the impeller with a magnetic resin material and integrating the rotor magnet and the blade, the structure is simple and the cost can be reduced and the magnet part can be enlarged, so that the motor performance, that is, the pump performance can be improved. Have.

According to a ninth aspect of the present invention, there is provided a cooler for removing heat from a heating element by a refrigerant, a radiator for releasing the taken heat from the refrigerant, and a pump for circulating the refrigerant. A cooling system comprising a pump.
Since the cooling system is characterized by being the thin vortex flow pump described in any one of to 8, the use of the thin vortex flow pump has the effect of making the entire system thinner.

The tenth aspect of the present invention is the cooling system according to the ninth aspect, which is a cooling system characterized by cooling electronic components of a small personal computer. By using, it is possible to achieve efficient cooling while achieving a thin product.

The invention according to claim 11 of the present invention is the cooling system according to any one of claims 9 to 10, characterized in that the refrigerant is an antifreeze liquid. Even in cold regions, it has an effect of preventing the cooling system from breaking down due to freezing of the refrigerant.

The invention according to claim 12 of the present invention is the cooling system according to claim 11, characterized in that the antifreeze liquid is a fluorine-based inert liquid, so that the refrigerant is a fluorine-based inert liquid. Therefore, even if the refrigerant leaks, it is possible to prevent the failure of the electronic component.

FIG. 1 shows an embodiment of the present invention.
It will be described with reference to FIG.

(Embodiment 1) FIG. 1 is a side sectional view of a thin vortex flow pump according to Embodiment 1 of the present invention, and FIG. 2 is a view of the thin vortex flow pump according to Embodiment 1 of the present invention as seen from the rotational axis direction. Sectional view and FIG. 3 are exploded perspective views of the thin vortex flow pump according to Embodiment 1 of the present invention.

As shown in FIGS. 1 to 3, reference numeral 1 denotes an impeller, which has a large number of blades 2 formed on the outer circumference and a rotor magnet 3 provided on the inner circumference. Here, in the impeller 1, the blade 2 and the rotor magnet 3 may be made of different materials and fitted together to be integrated, or may be made of a magnetic resin material so that the blade 2 and the rotor magnet 3 are made of the same material. You may make it. Reference numeral 4 denotes a motor stator provided on the inner peripheral side of the rotor magnet 3, and 5 a pump chamber for accommodating the impeller 1 and at the same time recovering the kinetic energy applied to the fluid by the impeller 1 to guide it to the discharge port. The pump casing 6 has a casing cover that forms a part of the pump casing and that houses the impeller 1 and then seals the pump chamber. The pump casing 5 is provided with a partition wall 8 arranged between the motor stator 4 and the rotor magnet 3 for airtight partitioning. Reference numeral 7 denotes a shaft fixed to the pump casing 5, which is inserted into a through hole at the center of the impeller 1 so that the impeller 1 can slide. The shaft 7 may be fixed to the pump casing 5 as a separate component by press fitting or insert molding, or may be integrally formed of the same material as the pump casing 5. Further, the impeller 1 and the pump casing 5 may be slidably rotatable with respect to each other.
Reference numeral 9 is a suction port, and 10 is a discharge port, both of which allow fluid to flow in and out in the radial direction of rotation of the impeller 1.

Next, the operation of the thin vortex pump of the first embodiment will be described. When power is supplied from an external power source,
A current controlled by an electric circuit provided in the thin eddy current pump flows through the coil of the motor stator 4 to generate a rotating magnetic field. When this rotating magnetic field acts on the rotor magnet 3, a physical force is generated in the rotor magnet 3. By the way, since the rotor magnet 3 is integrated with the ring-shaped impeller 1, a rotational torque acts on the impeller 1 and the impeller 1 starts to rotate by this rotational torque.
The blades 2 provided on the outer circumference of the impeller 1 give kinetic energy to the fluid flowing from the suction port 9 by the rotation of the impeller 1, and the kinetic energy gradually increases the pressure of the fluid in the pump casing 5 and the discharge port. Exhaled from 10.

As described above, according to the present embodiment, the blade 2 and the rotor magnet 3 are integrated to form the impeller 1, and the motor stator 4 is inserted into the impeller 1, whereby the rotary shaft of the entire pump is rotated. The length in the direction can be minimized and the pump can be made thinner. Further, by integrating the blade 2 and the rotor magnet 3, and the pump casing 5 and the shaft 7, respectively, the structure is simple and the cost can be reduced. Then, by displacing the magnetic centers of the rotor magnet 3 and the motor stator 4 to form a thrust component in the magnetic force and receiving the thrust load of the impeller 1 with this thrust component, the thrust load can be Since it is received by the magnetic bearing, the friction due to rotation can be reduced, and the pump can be made more efficient and have a longer life.

Further, by constructing the impeller 1 of a magnetic material and integrating the rotor magnet 3 and the blade 2,
Since the structure is simple and the cost can be reduced, the magnet portion can be enlarged, so that the motor performance, that is, the pump performance can be improved. Further, by using a vortex flow pump capable of high lift and high bubble discharge capability, it is possible to secure a required flow rate even in a circulation system with a large pipeline resistance and continuously discharge the inflowing bubbles without accumulating them. .

(Second Embodiment) FIG. 4 is an exploded perspective view of a thin vortex flow pump according to a second embodiment of the present invention. still,
The same components as those in the first embodiment are designated by the common reference numerals, and detailed description thereof will be omitted.

As shown in FIG. 4, reference numeral 11 denotes a shaft fixed to the impeller 1, which is inserted into a bearing structure portion formed at the center of the pump casing 5 and the casing cover 6 so that the impeller 1 slides. It is possible. The shaft 7 may be fixed to the impeller 1 by press fitting or insert molding as a separate component, or may be integrally formed of the same material as the impeller 1.

As described above, according to the present embodiment, the sliding area of the shaft 7 can be reduced and the friction portion can be reduced, so that the pump can be made highly efficient and have a long service life. Also,
By integrating the impeller 1 and the shaft 7, the structure is simple and the cost can be reduced.

(Third Embodiment) Next, FIG. 5 is a configuration diagram of a cooling system equipped with a thin vortex flow pump according to a third embodiment of the present invention.

In FIG. 5, 21 is a heat-generating component mounted on the substrate 22, 23 is a cooler for cooling the heat-generating component 21 by exchanging heat with the heat-generating component 21, and 24 is a radiator for removing heat from the coolant. Reference numeral 25 is a reserve tank for storing the refrigerant, 26 is a thin vortex pump for circulating the refrigerant, and 27 is a pipe connecting these. Here, the thin vortex pump 26 is the thin vortex pump described in the first or second embodiment.

The refrigerant in the reserve tank 25 is
It is discharged from the thin swirl pump 26, is sent to the cooler 23 through the pipe 27, and the heat of the heat-generating component 21 is taken to increase its temperature, which is then sent to the radiator 24 and cooled by the radiator 24. The temperature drops and returns to the reserve tank 25. In this way, the thin swirl pump 26 circulates the refrigerant to cool the heat generating component 21.

As described above, according to the present embodiment, it is possible to reduce the thickness of the entire system by using the thin vortex pump 26 for circulating the refrigerant. Further, if this cooling system is used to cool the electronic components of a small personal computer, efficient cooling can be realized while achieving a thin product. Then, if the refrigerant is an antifreezing liquid, it is possible to prevent the refrigerant from freezing in the cold district and causing a failure of the cooling system. Further, if the antifreeze liquid is a fluorine-based inert liquid, it is possible to prevent the failure of the electronic parts even if the refrigerant leaks.

If the thin vortex flow pump 26 is a vortex flow pump capable of high lift and high bubble discharge capability, a required flow rate can be secured even in a circulation system having a large pipeline resistance, so that the cooler 21 and the radiator 24 can be provided. Since the cooling system can be made thinner and the pipe 27 can be made smaller, the cooling system can be made smaller and thinner. Further, even if air enters the pipe, the bubbles that have flowed into the thin vortex pump 26 can be continuously discharged to the reserve tank 25 side without accumulating, so that the pump performance, that is, the cooling performance is not impaired. .

[0040]

According to the invention as set forth in claim 1, the blade and the rotor magnet are integrated, and the motor stator is inserted thereinto, whereby the length of the entire pump in the rotation axis direction can be made as small as possible, and the pump It has the effect of enabling thinning. Further, by integrating the blades and the rotor magnet, an effective effect that the structure is simple and the cost can be reduced can be obtained.

According to the second and third aspects of the present invention, the shaft can be fixed to the pump casing, and the shaft can be formed by insert molding or the like when the pump casing is molded, so that the assemblability can be improved. Further, since it can be formed of the same material as the pump casing, the number of parts can be reduced, and the assemblability can be improved at low cost.

According to the invention described in claim 4, the friction caused by the sliding movement of the shaft, the impeller and the pump casing is reduced,
The efficiency of the pump is improved and the life of the pump can be improved.

According to the fifth aspect of the present invention, since the thrust bearing is received by the magnetic bearing, the side surface of the impeller can be rotated without contact with the pump casing, and the friction portion can be reduced. Higher efficiency and longer life are possible.

According to the sixth and seventh aspects of the present invention, the shaft can be fixed to the impeller, and the shaft can be formed by insert molding or the like at the time of molding the impeller, so that the assemblability can be improved. Further, since it can be formed of the same material as the impeller, the number of parts can be reduced, and the assemblability can be improved at low cost.

According to the eighth aspect of the present invention, the impeller is made of a magnetic resin material and the rotor magnet and the blade are integrated, so that the structure is simple and the cost can be reduced, and the magnet portion is large. Motor performance,
That is, the pump performance can be improved.

According to the ninth aspect of the invention, a thin cooling system can be supplied by using the thin vortex pump.

According to the tenth aspect of the present invention, by using the thin vortex flow pump, it is possible to achieve efficient cooling while achieving a thin product.

According to the eleventh aspect of the present invention, by using the antifreeze liquid as the refrigerant, it is possible to prevent the refrigerant from freezing even in cold regions and to prevent the cooling system from malfunctioning, and to provide a highly reliable cooling system. be able to.

According to the twelfth aspect of the present invention, by using the fluorine-based inert liquid as the refrigerant, it becomes possible to prevent the failure of the electronic parts even if the refrigerant leaks, and highly reliable cooling. The system can be supplied.

[Brief description of drawings]

FIG. 1 is a side sectional view of a thin vortex pump according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of the thin eddy current pump according to the first embodiment of the present invention as seen from a rotation axis direction.

FIG. 3 is an exploded perspective view of the thin vortex flow pump according to Embodiment 1 of the present invention.

FIG. 4 is an exploded perspective view of a thin vortex flow pump according to a second embodiment of the present invention.

FIG. 5 is a configuration diagram of a cooling system including a thin swirl pump according to a third embodiment of the present invention.

FIG. 6 is a structural diagram of a conventional small centrifugal pump.

[Explanation of symbols]

1 impeller 2 feathers 3 rotor magnet 4 motor stator 5 Pump casing 6 casing cover 7 axes 8 partitions 9 Suction port 10 outlets 11 axes 21 heat generating parts 22 Substrate 23 Cooler 24 radiator 25 reserve tank 26 Thin vortex pump 27 piping

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) F04D 29/42 F04D 29/42 B G (72) Inventor Yoichi Susato 1006 Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Appliances Industry Co., Ltd. (72) Inventor, Jozo Azono, 1006, Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. F term (reference) 3H034 AA06 AA18 BB04 BB09 BB13 CC01 CC03 CC05 CC06 DD01 DD22 DD24 DD30 EE05 EE12 EE14

Claims (12)

[Claims] 1. An impeller having a large number of blades formed on the outer circumference and a rotor magnet provided on the inner circumference, a shaft for supporting the impeller, and a motor stator provided on the inner circumference side of the rotor magnet. A thin swirl pump, comprising: an airtight partition between the impeller and the motor stator; and a pump casing having a suction port and a discharge port. 2. The thin swirl pump according to claim 1, wherein the shaft is fixed to the pump casing, and the impeller rotates around the shaft. 3. The thin swirl pump according to claim 2, wherein the shaft is integrally formed with the pump casing. 4. The thin swirl pump according to claim 1, wherein the shaft is rotatably provided with respect to the impeller and the pump casing, respectively. 5. The rotor magnet and the motor stator are arranged such that their magnetic centers are offset from each other, and a thrust component is formed in the magnetic force, and the thrust component of the impeller receives the thrust load of the impeller. The thin eddy-current pump according to any one of to 4. 6. The thin swirl pump according to claim 1, wherein the shaft is fixed to the impeller, and a bearing is provided on the pump casing. 7. The thin swirl pump according to claim 6, wherein the shaft is formed integrally with the impeller. 8. The thin vortex pump according to claim 1, wherein the impeller is integrally formed of a magnetic material. 9. A cooler for removing heat from a heating element by a refrigerant, and a radiator for releasing the taken heat from the refrigerant.
A cooling system comprising a pump for circulating the refrigerant, wherein the pump is the thin swirl pump according to any one of claims 1 to 8. 10. The cooling system according to claim 9, wherein electronic components of a small personal computer are cooled. 11. The cooling system according to claim 9, wherein the refrigerant is an antifreeze liquid. 12. The cooling system according to claim 11, wherein the antifreeze liquid is a fluorine-based inert liquid.