JP2007057167A - Liquid flow cooling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a low-cost and long-lived liquid flow cooling device which is a pump without a movable part, prevents vibration and noise, reduces size and weight by simplifying structure. <P>SOLUTION: The liquid flow cooling device uses an ion conductive liquid as a cooling liquid, and is provided with an electromagnetic pump 32 comprising a magnetic field generation means for applying a magnetic field in a direction orthogonal to a flow direction of the ion conductive liquid, and an electric current generation means for applying an electric current in a direction orthogonal to the flow direction and magnetic field direction of the ion conductive liquid. The ion conductive liquid is flown by the electromagnetic pump 32 to cool a heating element 33. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a liquid flow cooling device that cools a heating element by flowing a cooling liquid, and in particular, is a cooling device including an electromagnetic pump that applies a magnetic field and an electric current to a liquid to flow the liquid.

  FIG. 6 is a block diagram showing an example of the configuration of a conventional liquid flow cooling device. As shown in this figure, this type of cooling device supplies liquid through a path of a liquid tank 11, a pump 12, a heating element 13, and a heat exchanger. It is configured to circulate and suppress overheating of the heating element 13.

As the liquid, water, antifreeze, or the like is used, and this liquid is circulated by being driven to flow by the pump 12 having an electric configuration.
The heat exchanger 14 lowers the temperature of the liquid that has risen in temperature as it passes through the heating element 13.

FIG. 7 shows a note type personal computer equipped with the above-described liquid flow cooling device. For convenience of explanation, the keyboard 15 is shown in a removed state.
This personal computer stands up when the liquid crystal display 16 is used, and is folded to the keyboard 15 side when not in use.

The wiring board 17 is mounted with an element that generates a large amount of heat, such as a CPU 18, and a water cooling jacket 19 is attached thereto.
That is, the water cooling jacket 19, the flexible tube 20, the heat radiating pipe 21, the liquid tank 23, and the pump 24 form a liquid flow path to prevent overheating of the CPU 18 and the like.
The heat radiating pipe 21 disposed on the back side of the liquid crystal display 16 forms a heat exchanger that lowers the temperature of the liquid.

JP 2004-193438 A

  Since the liquid flow cooling apparatus described above circulates the liquid by the pump 24 having an electric configuration, vibration and noise accompanying the operation of the pump 24 are generated.

  Therefore, an object of the present invention is to provide a liquid flow cooling device that prevents such vibration and noise from the pump 24.

  In order to achieve the above object, the present invention provides, as a first invention, a liquid flow cooling device that cools a heating element by flowing a cooling liquid with a pump, an ion conductive liquid provided as a cooling liquid, and the ions A magnetic field generating means for applying a magnetic field in a direction orthogonal to the flow direction of the conductive liquid; and an electromagnetic pump comprising a current generating means for applying a current in a direction orthogonal to the flow direction of the ionic conductive liquid and the magnetic field direction. A liquid flow cooling device is proposed.

  As a second invention, there is proposed a liquid flow cooling apparatus according to the first invention, characterized in that it has a liquid flow path comprising at least an electromagnetic pump, a heating element, a heat exchanger, and a liquid tank.

  As a third invention, in the liquid flow cooling device of the first invention, a flow path of the ion conductive liquid is provided between two magnets provided in the magnetron, and a magnetic field is applied to the ion conductive liquid by the two magnets. Then, a liquid flow cooling device is proposed in which an electrode for passing an electric current to the ion conductive liquid is disposed between these two magnets.

  In the liquid flow cooling device of the first invention, an ion conductive liquid is provided as a cooling liquid, and heat is generated by flowing the ion conductive liquid by a drive unit (electromagnetic pump) that generates electromagnetic force in accordance with Fleming's left-hand rule. Cool the body.

The drive unit described above applies a fluid force to the ion conductive liquid according to the magnetic field and current applied to the ion conductive liquid.
Therefore, since this electromagnetic pump has no moving parts, vibration and noise do not occur.

Further, since the ion conductive liquid is used as the cooling liquid, the liquid state is maintained even at room temperature, and no chemical reaction occurs at the electrode to which an electric current is applied. Therefore, no gas is generated at the electrode and the electrode is not corroded.
Furthermore, an inexpensive metal such as iron, aluminum, zinc, lead, or nickel can be used for the electrode.

Since the ion conductive liquid is non-volatile, no vapor pressure is generated, so that the liquid is not consumed and the flow path can be sealed.
Therefore, no liquid replenishment is required.

  In addition, the ion conductive liquid has merits such as flame retardancy, complete cost solvent system, chemical stability, good thermal stability, and high heat resistance (350 degrees or more).

  In addition, since the electromagnetic pump does not have a movable part for flowing a liquid, it can be reduced in size and weight as a simple structure, in particular, can be thinned, and is inexpensive and has a long life. Since a DC voltage may be applied to the electrode for supplying current, a special drive circuit or the like is not required.

  A liquid flow cooling device according to a second aspect of the present invention includes a liquid flow path including an electromagnetic pump, a heating element, a heat exchanger, and a liquid tank, and the ion conductive liquid is flowed by the electromagnetic pump and flows through the liquid flow path. Cool down.

The liquid flow cooling device of the third invention applies a magnetic field to the ion conductive liquid using two magnets provided in the magnetron, and arranges an electrode between the two magnets to supply current to the ion conductive liquid. The electromagnetic pump is configured by providing a current generating means for flowing the current.
By comprising in this way, the liquid flow cooling device of a magnetron can be comprised simply.

Next, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing a configuration example of a liquid flow cooling device according to the present invention.
In this figure, 31 is a liquid tank, 32 is an electromagnetic pump, 33 is a heating element, and 34 is a heat exchanger.

The liquid tank 31 stores an ion conductive liquid.
In addition, potassium chloride aqueous solution etc. can be used as an ion conductive liquid.

  The electromagnetic pump 32 causes the ion conductive liquid to flow, and circulates the ion conductive liquid through the flow path of the liquid tank 31, the electromagnetic pump 32, the heating element 33, and the heat exchanger 34.

  The heating element 33 is a variety of heating elements such as industrial magnetrons and heating parts such as a CPU incorporated in a personal computer, and is cooled so as not to be overheated and absorbed by the ion conductive liquid.

  The heat exchanger 34 is a kind of radiator that dissipates the ionic conductive liquid whose temperature has been increased by heat transfer from the heating element and sends the ionic conductive liquid whose temperature has been lowered to the liquid tank 31.

FIG. 2 is a simplified diagram showing a configuration example of the electromagnetic pump 32 described above.
As shown in the drawing, a coil 36 that forms magnetic field generating means and electrode plates 37a and 37b that form current generating means are provided in a cooling pipe 35 that feeds the ion conductive liquid.

The coil 36 generates a magnetic field Φ in the direction of the arrow in the figure by supplying power.
That is, the magnetic field Φ is applied to the ion conductive liquid from the direction orthogonal to the tube axis of the cooling pipe 35.

The electrode plates 37a and 37b are supplied with power by an orthogonal power source 38 and apply a predetermined voltage between the electrode plates 37a and 37b.
Thus, a direct current I in the direction of the arrow flows through the ion conductive liquid.

  As a result, the electromagnetic pump 32 generates an electromagnetic force in the direction indicated by the arrow F according to Fleming's left hand rule, and the ionic conductive liquid is driven to move in the direction indicated by the arrow F by the electromagnetic force of the electromagnetic pump 32.

  Thus, the ion conductive liquid circulates through the flow path of the liquid tank 31, the electromagnetic pump 32, the heating element 33, and the heat exchanger 34, and the heating element 33 is cooled.

FIG. 3 shows an embodiment in which cooling pipes 35a, 35b, and 35c for cooling a plurality of heating elements 33a, 33b, and 33c are connected in parallel. In the case of such a configuration, the cooling pipes 35a, 35b, and 35c are arranged. It is preferable to provide the above-described electromagnetic pumps 32a, 32b, and 32c so that an ion conductive liquid having a flow rate corresponding to the capability of the electromagnetic pump can be circulated.
That is, since the electromagnetic pumps 32a, 32b, and 32c can be reduced in size, the electromagnetic pumps can be connected in parallel as in this embodiment.

4 and 5 are simplified diagrams showing an embodiment in which the liquid flow cooling device of the present invention is implemented in an industrial magnetron.
As shown in the figure, this type of magnetron 40 is provided with two magnets 41 and 42 at the upper and lower ends of a cylindrical anode 43 for rotating thermionic electrons emitted from the cathode surface.

The magnetron 40 implemented in this way is configured to allow an ion conductive liquid to flow between the two magnets 41 and 42 that are outside the anode 43.
Then, a magnetic field is generated as shown by the arrow Φ in the figure, and electrode plates 45 a and 45 b that are fed by the DC power supply 44 are provided between the two magnets 41 and 42 so that the current I flows.

With this configuration, the electromagnetic pump 46 is formed that generates an electromagnetic force according to Fleming's left-hand rule by the magnetic field Φ and the current I.
Therefore, the magnetron 40 can be cooled by causing the ion conductive liquid to flow by the electromagnetic pump 46.

  4 and 5, reference numeral 47 is a microwave output antenna, 48 is a filament lead for supplying a filament voltage, 49 is a cover, 50 is an inflow pipe for an ion conductive liquid, and 51 is the same. Each of the liquid outlet pipes is shown.

  Although the embodiment of the present invention has been described above, when the present invention is implemented in the conventional personal computer shown in FIG. 7, the pump 24 is the electromagnetic pump 32 described above, and the cooling liquid is an ion conductive liquid. It can be implemented in the same manner as described above.

  It can be applied as a liquid flow cooling device for cooling a heating element such as an industrial magnetron or a CPU of a personal computer.

It is the block diagram which showed the structural example of the liquid flow cooling device which concerns on this invention. It is the simple figure which showed the structural example of the electromagnetic pump with which said liquid flow cooling device was equipped. It is a block diagram which shows the partial structure of the liquid flow cooling device made into the structure which connects a cooling pipe in parallel and cools a several heat generating body. It is a simplified diagram of a magnetron showing an embodiment implemented as a cooling device for an industrial magnetron. It is an external appearance perspective view of the magnetron shown in FIG. It is a block diagram which shows the structural example of the liquid flow cooling device shown as a prior art example. It is a perspective view which shows the note type personal computer provided with the conventional liquid flow cooling device.

Explanation of symbols

31 Liquid tank 32 Electromagnetic pump 33 Heating element 34 Heat exchanger 35 Cooling pipe 36 Coils 37a, 37b Electrode plate

Claims (3)

In a liquid flow cooling device that cools a heating element by flowing a cooling liquid using a pump,
An ion conductive liquid provided as a cooling liquid;
Magnetic field generating means for applying a magnetic field in a direction orthogonal to the flow direction of the ionic conductive liquid, and current generating means for applying a current in a direction orthogonal to the flow direction of the ionic conductive liquid and the magnetic field direction A liquid flow cooling device comprising a pump. The liquid flow cooling device according to claim 1,
A liquid flow cooling apparatus comprising a liquid flow path including at least an electromagnetic pump, a heating element, a heat exchanger, and a liquid tank. The liquid flow cooling device according to claim 1,
A flow path of the ion conductive liquid is provided between the two magnets included in the magnetron, and a magnetic field is applied to the ion conductive liquid by the two magnets, and a current is supplied to the ion conductive liquid between the two magnets. A liquid flow cooling device, characterized in that an electrode is provided.

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