JP2004118251A - Electronic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid cooling system having high reliability to a failure in a cooling system by facilitating extension of an electronic device and work in maintenance, and preventing leakage of a liquid in attaching and detaching the electronic device. <P>SOLUTION: The electronic devices 3 are provided with a liquid cooling system of one closed loop, and a liquid-cooling system of the other closed loop is installed in a cabinet 2 where a plurality of electronic devices 3 are mounted. The liquid cooling systems of the closed loops are formed of incoming radiation parts 10, 11 and pumps 6, 9. The electronic devices 3 are provided with a projection, whereby an opening and closing valve 13 for stopping a liquid and circulating the same is opened and closed by attachment and detachment to and from the cabinet 2. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an electronic device provided with a cooling device using liquid circulation.
[0002]
[Prior art]
Examples of the electronic device include a large-sized computer such as a bank and a company, and a medium-sized server computer in addition to a general notebook personal computer and a desktop personal computer.
The server computer includes a server (hereinafter referred to as an electronic device) to which a plurality of terminals are connected. This electronic device is obtained by stacking a plurality of electronic devices each equipped with calculation software, software for taking in mail data, and the like.
[0003]
Therefore, the user may replace, add, or delete an electronic device equipped with software depending on the purpose of use.
[0004]
Since such an electronic device is constantly accessed from a terminal, there is a restriction that each electronic device must be constantly energized regardless of day or night.
Accordingly, the cooling device of each electronic device is provided with an auxiliary cooling device in addition to the main cooling device. For example, when the main cooling device has failed, an alarm of a failure is issued, and then cooling is performed by the auxiliary cooling device until the main cooling device is restored.
[Patent Document 1]
JP-A-6-97338 (page 6, FIG. 1)
[Patent Document 2]
JP-A-5-142886 (page 3, FIG. 1)
For example, Japanese Patent Laying-Open No. 6-97338 discloses a liquid circulation type cooling device for a large computer.
Japanese Patent Laid-Open No. 5-142886 discloses a notebook personal computer provided with a cooling device using liquid circulation.
[0005]
[Problems to be solved by the invention]
The cooling device of the electronic device generally uses a fan.
However, with the recent increase in speed and capacity, the temperature of semiconductor elements (hereinafter referred to as CPU) in each electronic device has increased, and cooling by the fan has been limited. Since high-speed rotation causes a noise problem, cooling by liquid circulation, which was once performed by a large computer, has been reviewed.
[0006]
By applying the above-mentioned conventional technology, it is necessary to improve the safety and the like in the future and to study a cooling device using a highly reliable liquid circulation.
[0007]
An object of the present invention is to provide a highly reliable electronic device.
[0008]
[Means for Solving the Problems]
An object of the present invention is to provide an electronic apparatus having an electronic device on which a semiconductor element is mounted, and a rack for stacking and storing a plurality of the electronic devices, wherein a first heat receiving unit for receiving heat of the semiconductor element, A first liquid driving means for circulating the heat, a first heat exchanger for radiating heat of the liquid, and a first heat exchanger for connecting the first heat receiving portion, the first liquid driving means and the first heat exchanger. A first cooling device including a first pipe and a first cooling device attached to each of the electronic devices, a second heat receiving portion that contacts the first heat receiving portion, and a second heat receiving portion that circulates a liquid through the second heat receiving portion. A two-liquid driving unit, a second heat exchanger in contact with the second heat exchanger, and a second connecting the second heat receiving unit, the second liquid driving unit, and the second heat exchanger. This is achieved by attaching a second cooling device provided with piping to the rack.
[0009]
Further, the above-mentioned object is that the first cooling device is detachable from the rack, and the first cooling device is attached to and detached from the second pipe so that liquid is supplied to the second cooling device. This is achieved by providing an on-off valve for stopping operation.
[0010]
Further, the above object is achieved by that the liquid circulation direction of the first cooling device is different from the liquid circulation direction of the second cooling device.
[0011]
Further, the above object is achieved by changing the pipe diameter of the second pipe from large to small in the direction from the upstream to the downstream of the liquid.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
When a cooling device for liquid circulation is attached to each of the electronic devices described in the related art, it is necessary to attach the liquid circulation device in duplicate, like a safety device using a fan.
However, mounting two liquid circulation devices inside each electronic device is very disadvantageous in terms of space and cost.
[0013]
Therefore, in the present invention, as a result of studying a safe and effective cooling device without mounting two liquid circulation devices for each electronic device, the following example was obtained.
[0014]
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of an electronic apparatus having the present embodiment.
In FIG. 1, reference numeral 1 denotes an electronic apparatus main body (also called a server). Reference numeral 2 denotes a cabinet 2 forming an outer shell of the electronic apparatus main body 1. Reference numeral 3 denotes a single electronic device inserted into the cabinet 2 (in this embodiment, an example in which eight stages are inserted). Reference numeral 4 denotes a display unit 4 provided on the front side 5 of the electronic apparatus 3 alone. The display unit 4 is a part for displaying whether or not the electronic device 3 is energized, and for displaying a failure of the cooling device.
[0015]
FIG. 2 is a schematic view of a water cooling system mounted on the electronic apparatus of FIG. 1 as viewed from a side.
In FIG. 2, a plurality of electronic device units 3 are stacked in a cabinet 2 of the electronic device 1. The electronic device 3 has a CPU 7 that generates heat. The heat generated by the CPU 7 is removed by the water cooling jacket 15. The cooling liquid flows in the direction of arrow 14 indicating the liquid circulation direction. The coolant is driven by the micropump 6, first passes through the water cooling jacket 15, is radiated by the heat exchanger 8, and returns to the micropump 6.
On the other hand, the cabinet 2 is provided with a fixed pipe 12, a first heat receiving unit 10, a second heat receiving unit 11, and a large pump 9. When the electronic device 3 is mounted on the cabinet 2, the on-off valve 13 provided in the fixed pipe 12 of the cabinet 2 is opened, and the coolant circulates individually and in parallel to each electronic device 3. .
[0016]
The water cooling jacket 15 and the heat exchanger 8 in each electronic device unit 3 and the first heat receiving unit 10 and the second heat receiving unit 10 in the cabinet 2 are in thermal contact. Thereby, the heat generated from the CPU 7 of each electronic device 3 can be transmitted to the cabinet 2. The heat transmitted to the cabinet 2 is naturally released to the entire cabinet 2 or is forcibly released to the atmosphere by a cooling fan provided in the cabinet.
[0017]
Since each of the electronic device 3 and the liquid cooling system of the cabinet 2 have a single configuration, it is possible to prevent leakage of the cooling liquid when the electronic device 3 is attached or detached.
Further, even when a failure occurs in one of the liquid cooling systems, the electronic apparatus is not stopped. In addition, when the liquid passes through the heating element, the liquid temperature always increases. The coolant circulation direction of the electronic device 3 and the coolant circulation direction 14 of the cabinet 2 are opposite to each other. Since the low temperature part of the cabinet 2 is located at the high temperature part of the electronic device unit 3, the temperature rise of the cooling liquid can be reduced, and the reliability of the material constituting the liquid cooling system can be improved.
[0018]
FIG. 3 is a schematic diagram showing a case where one electronic device 3 is not mounted on the cabinet of FIG.
In FIG. 3, when the electronic device 3 is not mounted, the on-off valve 13 provided in the fixed pipe 12 of the cabinet 2 is closed, and the cooling of the cabinet 2 is performed at the position where the electronic device 3 is mounted. The liquid does not circulate.
Therefore, the cooling liquid is not circulated to a portion that does not require cooling, and the load on the large pump 9 can be reduced. It is possible to prevent a decrease in the flow rate of the cooling liquid flowing in the piping of the cabinet 2 and prevent a decrease in heat exchange.
[0019]
FIG. 4 shows a schematic diagram in the case where the pipe flow area on the cabinet side is changed.
In FIG. 4, in order to reduce the pressure loss in the piping of the liquid cooling system inside the cabinet 2, the piping closer to the pump has a larger sectional area. Thereby, the amount of the cooling liquid supplied to each electronic device 3 can be made uniform.
[0020]
FIG. 5 is a diagram showing an embodiment in which only three electronic device units 3 can be mounted, unlike the case of FIG. FIG. 6 is a side sectional view of FIG.
5 and 6, a plurality of electronic device units 3 are mounted on a cabinet 2 of the electronic device 1. The CPU 7 is mounted in the electronic device 3 alone, and the heat generated by the CPU 7 is removed by the water cooling jacket 15. The coolant flows in the direction of arrow 14. The cooling liquid is driven by the micro pump 6.
First, heat is radiated by the heat exchanger 8 through the water cooling jacket 15 and returns to the micropump 6. On the other hand, a fixed pipe 12, a first heat receiving unit 10, a second heat receiving unit 11, and a large pump 9 are attached to the cabinet 2.
When the electronic equipment unit 3 is mounted in the cabinet 2, the on-off valve 13 provided in the fixed pipe 12 of the cabinet 2 opens, and the coolant circulates to each electronic equipment unit 3 individually and in parallel. . The water cooling jacket 15 and the heat exchanger 8 in each electronic device unit 3 and the first heat receiving unit 10 and the second heat receiving unit 11 in the cabinet 2 are in thermal contact.
[0021]
Thereby, the heat generated from the heating element 7 of each electronic device 3 can be transmitted to the cabinet 2. The heat transmitted to the cabinet 2 is naturally released to the entire cabinet 2 or is forcibly released to the atmosphere by a cooling fan provided in the cabinet.
[0022]
As described above, in the present embodiment, since the cooling system of each electronic device 3 and the liquid cooling system of the cabinet 2 are provided independently, it is possible to eliminate the leakage of the cooling liquid when the electronic device 3 is attached and detached. it can.
Further, even if a failure occurs in one of the liquid cooling systems, the electronic apparatus is not stopped.
Further, when the liquid passes through the CPU, the liquid temperature rises, and the cooling liquid circulation direction of the electronic device unit 3 and the cooling liquid circulation direction 14 of the cabinet 2 are opposite to each other. The low temperature part of the cabinet 2 is located at the high temperature part, so that the temperature rise of the cooling liquid can be mitigated, and the reliability of the material constituting the liquid cooling system can be improved.
[0023]
FIG. 7 is a partial cross-sectional view of an electronic device alone including another embodiment of the electronic device 1.
7, three heating elements (a first heating element 16, a second heating element 17, and a third heating element 18) are mounted on the electronic device 3 alone. Each heating element has a different shape and a different heating value. The water cooling jacket 15 mounted on these three heating elements is in thermal contact with the first heat receiving portion 19, the second heat receiving portion 20, and the third heat receiving portion 21 mounted on the cabinet 2, The heat can be individually transferred. The coolant flows in the direction of arrow 14. The heat transmitted to the cabinet 2 is naturally released to the entire cabinet 2 or is forcibly released to the atmosphere by a cooling fan provided in the cabinet.
[0024]
Since each of the electronic device 3 and the liquid cooling system of the cabinet 2 are independently configured, it is possible to prevent the leakage of the cooling liquid when the electronic device 3 is attached or detached.
Further, even if a failure occurs in one of the liquid cooling systems, the electronic apparatus is not stopped.
In addition, when the liquid passes through the heating element, the liquid temperature always increases.
Since the cooling liquid circulation direction of the electronic device unit 3 and the cooling liquid circulation direction of the cabinet 2 are opposite to each other, the low temperature portion of the cabinet 2 is located at the high temperature portion of the electronic device unit 3 and the temperature of the cooling liquid rises. And the reliability of the material constituting the liquid cooling system can be improved.
[0025]
FIG. 8 is a graph showing a change in the element temperature 22 of the first heating element 16, the second heating element 17, and the third heating element 18 mounted on the electronic device 3 of FIG. .
In FIG. 8, the solid line is the current multi-water cooling system 23, and the broken line is the conventional single liquid cooling system. As a result, the multi-water cooling system 23 can set the same element temperature 22 for all three heating elements. On the other hand, in the conventional single liquid cooling system 24, the liquid temperature rises, so that the element temperature 22 becomes higher toward the downstream side.
[0026]
As described above, the liquid cooling system provided in the electronic device and the liquid cooling system provided in the cabinet in which the plurality of electronic devices are mounted are thermally joined at the heat receiving sections constituting the liquid cooling systems, or Contact.
Furthermore, even if the liquid cooling system stops due to a failure of the pump or the like, multiple cooling systems are provided so as not to stop the electronic device. In addition, when the electronic device is provided with a projection, and the electronic device is attached to and detached from the cabinet, the opening / closing valve of the liquid cooling system of the cabinet is operated, and the liquid circulates only at the portion where the electronic device is mounted.
[0027]
According to the present embodiment, the heat generated by the electronic device is carried to the cabinet, where it can be radiated to the atmosphere, and heat can be exchanged. A highly reliable electronic device can be provided without stopping. When the electronic equipment is attached to or detached from the cabinet, the on-off valve of the liquid cooling system of the cabinet is operated, the liquid circulates only at the place where the electronic equipment is mounted, the load on the pump is reduced, and the coolant can be used effectively. .
[0028]
【The invention's effect】
According to the present invention, a highly reliable electronic device can be provided.
[Brief description of the drawings]
FIG. 1 is a perspective view of a first embodiment of the present invention.
FIG. 2 is a side sectional view of FIG. 1;
FIG. 3 is a side cross-sectional view in which one electronic device alone is removed from the embodiment of FIG. 1;
FIG. 4 is a side cross-sectional view of the electronic device in which a flow passage area of a pipe is changed.
FIG. 5 is a perspective view of an electronic apparatus provided with another embodiment of the present invention.
FIG. 6 is a side sectional view of FIG. 5;
FIG. 7 is a side cross-sectional view of an electronic apparatus alone having another embodiment.
FIG. 8 is a graph showing the CPU element temperature described in the embodiment of FIG. 7;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Electronic device device, 2 ... Cabinet, 3 ... Electronic device device alone, 4 ... Display part, 5 ... Front side, 6 ... Micro pump, 7 ... Heat generating element , 8 ... radiator, 9 ... large pump, 10 ... heat receiving part A, 11 ... heat receiving part B, 12 ... fixed piping, 13 ... on-off valve, 14 ... liquid Circulation direction, 15: water cooling jacket, 16: first heating element, 17: second heating element, 18: third heating element, 19: first heat receiving unit, 20: second heat receiving section, 21: third heat receiving section, 22: element temperature, 23: multi liquid cooling system, 27: single liquid cooling system.

Claims (4)

In an electronic device having an electronic device equipped with a semiconductor element and a rack for stacking and storing a plurality of the electronic devices,
A first heat receiving unit that receives heat of the semiconductor element, a first liquid driving unit that circulates liquid through the heat receiving unit, a first heat exchanger that releases heat of the liquid, and the first heat receiving unit A first cooling device comprising a first part, a first liquid driving means, and a first pipe connecting the first heat exchanger, is attached to each of the electronic devices,
A second heat receiving portion that contacts the first heat receiving portion, a second liquid driving unit that circulates liquid through the second heat receiving portion, and a second heat exchanger that contacts the second heat exchanger And a second cooling device including a second pipe connecting the second heat receiving section, the second liquid driving means, and the second heat exchanger to the rack. apparatus. The first cooling device is detachable from the rack, and an opening / closing valve for stopping the liquid to the second cooling device by attaching / detaching the first cooling device to the second pipe. The electronic device according to claim 1, further comprising: 2. The electronic device according to claim 1, wherein a liquid circulation direction of the first cooling device is different from a liquid circulation direction of the second cooling device. 2. The electronic device according to claim 1, wherein the pipe diameter of the second pipe changes from large to small in a direction from upstream to downstream of the liquid.

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