JP2010086618A - Electronic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide electronic equipment in which noise is suppressed with simple constitution and cooling is performed for a noise-generating heating element such as a disk drive device mounted in the electronic equipment. <P>SOLUTION: In a cooling device 8 of a liquid cooling system cooling a sound-generating and heat-generating member 3 generating heat as well as sound, at least one of heat receiving members 81 form one portion of nearly sealed box body structure including a sound-generating and heat-generating member 3 by engagement with a storage base body 91, the heat receiving member 81 forming one portion of the box body structure has sealed space of double structure and constitutes a tank function storing a refrigerant liquid, thermally connects the sound-generating and heat-generating member 3 with a wall plane of the inside of one portion of the box body structure, and constitutes a heat receiving function of receiving heat by the refrigerant liquid flowing in the inside of the sealed space of double structure. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electronic device, and relates to an electronic device that realizes cooling and sound insulation of a device that generates heat and noise in a small size and at low cost.

  In recent years, electronic devices such as personal computers have promoted an increase in information processing speed. For example, in a central processing unit (hereinafter referred to as a CPU), the clock frequency is remarkably increased, and a hard disk drive device (hereinafter referred to as an HDD) or an optical disk drive device (hereinafter referred to as a disk device including an HDD). ), The amount of recorded information is increased and the transfer speed is increased. Each device mounted on these electronic devices is in a situation where the amount of heat generation increases as the information processing speed increases.

  In addition, with the diversification of uses of electronic devices, demands for miniaturization are increasing. For this reason, the electronic components and drive / components constituting the electronic apparatus are in a state of being mounted with a very high density.

  Conventionally, each heating element in these electronic devices is provided with a heat sink, and further cooled by an air cooling method in which cooling air is blown by a cooling fan toward each heat sink. However, the air cooling system is a hindrance to the lack of cooling capacity and downsizing of electronic devices. In the above situation, in order to improve the cooling performance, a liquid cooling type cooling device by circulating a refrigerant liquid has been put into practical use.

  Of various heating elements mounted in electronic devices, in a device having a drive portion such as a disk device, heat generation of a bearing portion at high-speed rotation of the disk is achieved by increasing the capacity of information and increasing the processing speed. And the sound during head seek is also increasing. These increases in heat generation and noise not only cause a decrease in performance in the apparatus, but also present a problem for the surrounding environment.

  In order to solve these problems, for example, the HDD is placed inside an airtight container to suppress the leakage of sound to the outside of the container, and on the other hand, the heat accumulated in the container Patent Documents 1 to 4 disclose a technique for transferring heat to the outside of the storage body to dissipate heat.

JP 2000-133961 A JP-A-2005-353251 JP 2004-326908 A JP 2007-287212 A

  The techniques related to cooling and soundproofing described in the above-mentioned patent documents have the following problems that need to be solved.

  In the electronic information device described in Patent Document 1, a hard disk device is housed in a sound insulation case by a heat conducting member and a sound absorbing member, and sound insulation is performed, and a part of the heat conductive member is drawn outside the sound insulation case to externally. Heat transfer to the outside by attaching to the electronic information equipment. However, in the technique described in Patent Document 1, heat transfer to the outside is a method that depends on the thermal conductivity and shape of the heat conductive member, and in order to obtain sufficient cooling performance, It requires an increase in area and a significant improvement in heat conduction characteristics, and there are concerns about restrictions on cooling performance.

  In the hard disk drive device described in Patent Document 2, a heat pipe is brought into close contact with a part of the hard disk drive device, and the outer periphery is covered with a soundproofing material to suppress leakage of sound to the outside and transfer heat. However, in the technique described in Patent Document 2, since the heat pipe is provided to transfer heat to the outside covered with the soundproofing material, the heat pipe is installed and the heat pipe is attached. Depending on how the drive device is incorporated and how it is handled, there may be a problem that heat transfer, which is a problem with heat pipes, cannot be performed.

  The recording / playback apparatus described in Patent Document 3 is configured to transfer heat generated by a hard disk to the outside by a heat conductive plastic to dissipate heat. However, in the technique described in Patent Document 3, there is a concern that a heat transfer amount sufficient to obtain a desired cooling performance cannot be obtained as in Patent Document 1.

  The electronic device described in Patent Document 4 is configured such that the heat generated by the HDD is received by a refrigerant liquid that flows inside the heat receiving unit, and the HDD and the heat receiving member are placed in a sealed chamber. However, in the technique described in Patent Document 4, the heat generated from the HDD is received in a sealed chamber by a water-cooled refrigerant liquid, transferred to the outside, and radiated by a heat radiating member to improve the cooling performance. There are problems as a cooling device of a water cooling system, such as a problem of leakage of the refrigerant liquid in the sealed chamber, and a tank for replenishing the refrigerant liquid, which increases the size of the apparatus.

  As described above, the related art has a problem to be solved in order to reduce noise and cooling in an electronic device equipped with a heating element that generates noise. The objective of this invention is providing the electronic device which suppresses noise and performs efficient cooling.

  In order to solve the above-described problems, an electronic apparatus having a heat generating device such as a hard disk drive of the present invention includes a double-structure box heat receiving portion that substantially includes the heat generating device, and the box heat receiving portion. A heat dissipating part for cooling the flowing cooling medium; and a refrigerant circulating part for circulating the cooling refrigerant between the box heat receiving part and the heat dissipating part, and the box heat receiving part includes a device for generating the heat. In addition to storing sound insulation, the cooling medium flows through the double-structured sealed space, and the heat generating device is thermally connected to the inner wall surface of the box heat receiving portion so that the generated heat is received by the cooling medium. I made it.

  The present invention has the following configuration in order to solve the above problems. In an electronic device equipped with a sound generating heat generating member that generates sound and generates heat and a cooling device that cools the sound generating heat generating member, the cooling device that cools the sound generating heat generating member connects the heat receiving member and the heat radiating member with a plurality of pipes. A liquid age type cooling device that circulates and flows a refrigerant liquid to perform heat conversion and heat transfer, and at least one of the heat receiving members includes a sound generating heat generating member when engaged with the storage base. The heat receiving member that forms a part of the body structure and forms a part of the box structure has a double-structured sealed space, and constitutes a tank function for storing the refrigerant liquid. A heat receiving member that is thermally connected to the sound generating heat generating member on the wall surface and that receives heat by the refrigerant liquid flowing through the inside of the double-structured sealed space, and a part of the box structure heat receiving member And the cold that flows and stays in the heat receiving member. By a liquid cooled heat pronunciation heat generating member, and a part of the heat receiving section member of the box structure by a housing base body, and to suppress configure the sound pronunciation exothermic member.

  ADVANTAGE OF THE INVENTION According to this invention, with respect to the heat generating body which generate | occur | produces noise, such as a disk drive apparatus mounted in an electronic device, an electronic device which suppresses a noise by simple structure and aims at cooling can be provided.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic configuration diagram showing an embodiment of an electronic apparatus according to the present invention. In FIG. 1, a hard disk drive device (HDD) 3 and an optical disk drive device 4 are mounted inside a housing 2 of the electronic device 1. Furthermore, it has a semiconductor electronic component (for example, CPU) 6 mounted on the circuit board 5. In addition, members such as a power source 7 are mounted.

  Since the electronic device 1 is in a state of generating heat as described above in these electronic components, members, and devices, a water-cooling type cooling device 8 is mounted to cool any of these as required. Yes.

  The present invention is characterized by a configuration for cooling the HDD 3 or the optical disk drive 4 that generates noise. However, the embodiment shown in FIG. 1 is cooled together with the CPU 6 or other heating elements. The cooling device 8 that can also be mounted. Therefore, it goes without saying that the cooling of the CPU 6 is not an essential configuration.

  More specifically, the cooling device 8 shown in FIG. 1 includes, for example, the HDD 3 and has a tank function for thermally connecting to the included HDD 3 to receive heat generated by the HDD 3 by the refrigerant liquid and storing the refrigerant liquid. The first heat receiving member 81 and the heat radiating member 82 that radiates heat received by the refrigerant liquid in the first heat receiving member 81 to the atmosphere are connected by a plurality of pipes 83, and the refrigerant liquid is circulated by the pump 84. The basic structure is the water cooling system.

  Here, the first heat receiving member 81 is not necessarily configured to have a tank function, and will be described later in detail, but may be a configuration in which a predetermined amount of refrigerant liquid includes the HDD 3.

  In addition, the second heat receiving member 85 that is thermally connected to the CPU 6 and receives heat is disposed between the circulation channels of the refrigerant liquid, but it is not an essential configuration as described above, and if necessary, If the second heat receiving member 85 is provided in the circulation path of the refrigerant liquid.

Next, a structure for suppressing noise and heat generation of the HDD 3 in the present invention will be described in detail.
FIG. 2 is a configuration diagram showing an embodiment relating to a configuration for sound insulation and cooling of an HDD mounted on an electronic apparatus according to the present invention.

  Each member illustrated in FIG. 2 is schematically illustrated for easy understanding of the description, and does not illustrate the relationship between the shape and size. As shown in FIG. 2, the HDD 3 is configured to be placed inside a sealed box formed by the storage base 91 and the first heat receiving member 81.

  For example, the storage base 91 includes a base portion 911 on which the HDD 3 is placed at a position indicated by a two-dot chain line, and includes an outer peripheral front wall 912 and side walls 913 and 914. Although the structure of the first heat receiving member 81 will be described in detail later, it has an upper flat surface portion 811 and a lower flat surface portion 812, and is formed in a substantially U shape via the one side flat surface portion 813. Yes. However, the shape is not limited to the substantially U-shaped shape as described above, and a plurality of substantially L-shaped shapes may be provided and both may be connected by piping. The flat portion 811 and the lower flat portion 812 may be formed by a structure that can be easily processed.

  Here, the storage base 91 is configured such that the HDD 3 is placed and can be moved forward and backward in the directions of arrows (A) and (B). The HDD 3 is placed on the base portion 911 in a state where the storage base 91 is moved in the arrow (b) direction. Further, when the storage base 91 moves in the direction of the arrow (A), for example, the flat portions (811, 812, 813) of the first heat receiving member 81 and the outer peripheral walls (912, 913, 914) of the storage base 91, This is a substantially hermetically sealed box structure in which the HDD 3 is in an encapsulated state due to the combination.

  Next, the structure of the first heat receiving member 81, which is one member forming a substantially hermetically sealed box for enclosing the HDD 3, will be described in detail with reference to FIG.

  The first heat receiving member 81 heats the substantially flat base body 816 and the cover body 817 in order to make the refrigerant flow into the planar sealed space formed by the opposing flat plate members. It is formed in a substantially U shape by a metal material (for example, aluminum material) excellent in conductivity, and has a structure in which an airtight space is formed inside by joining joints by brazing or the like.

  The reason why the base body 816 has a flat plate shape is to facilitate processing, and it is mentioned that two parts having the same shape as the cover body 817 may be joined from both sides and brazed at an intermediate portion. Not too long.

  Furthermore, the reason why it is formed in a substantially U-shape is that the heat generating part is the upper and lower planes of the HDD 3, and the plane opposite to the heat generating surface is the heat receiving part. The structure of the heat receiving portion may be different in shape such as a substantially L shape and a substantially square shape, or may be configured such that a plurality of substantially L-shaped members are connected by piping.

  Further, the first heat receiving member 81 is provided with a refrigerant liquid inlet 814 and an outlet 815 on any one of the outer planes of the plane portions (for example, 811, 812, 813).

  Furthermore, a plurality of recesses (convex shapes facing inward) are formed on the outer surface of the base body 816 or the upper and lower flat surfaces (811, 812) of the cover body 817 by drawing. This improves the rigidity of the base body 816 or the cover body 817, forms a flow path for the refrigerant liquid, increases the contact area with the refrigerant liquid, and increases the flow speed of the refrigerant liquid. It is preferable to form as many recesses as possible.

  In the above configuration, the thermal connection state between the HDD 3 and the first heat receiving member 81 will be described again.

  As the HDD 3 moves in the direction of the arrow (A), either one of the outer peripheral upper and lower planes of the HDD 3 is pressed by the pressing member 818, and the upper and lower planes of the HDD 3 on the opposite side of the pressing member 818 are moved on the first heat receiving member 81. It is the structure thermally connected with the inner wall surface of a plane part (811 or 812). Further, the pressing member 818 is thermally connected to the inner wall surface of the flat portion (812 or 811) of the first heat receiving member 81 and the pressing side plane of the HDD 3.

  By connecting in this way, the heat generated in the HDD 3 is transferred from both the upper and lower flat surfaces of the HDD 3 to the inner wall surface of the first heat receiving member 81 (811, 812). Further, as described above, the heat receiving member 81 is stored while flowing the refrigerant liquid through the internal sealed space, so that the heat transferred to the inner wall is received by the refrigerant liquid.

  For example, as in the embodiment shown in FIG. 1, when the refrigerant liquid inlet 814 is provided in the upper plane portion 811, the refrigerant liquid radiated by the heat radiating member 83 receives a large amount of heat generated by the HDD 3 from the upper plane portion 811. The structure which does is preferable. Therefore, the HDD 3 is configured to be pressed upward by the pressing member. However, since the other surface of the HDD 3 is also thermally connected through the pressing member, it may be pressed downward.

  Furthermore, in the thermal connection between the flat portion 811 (812) of the HDD 3 and the first heat receiving member 81, it is preferable to interpose a heat conductive sheet or heat conductive grease.

  Next, the circulating state of the refrigerant liquid will be described. The refrigerant liquid flowing in from the upper flat surface portion 811 of the first heat receiving member 81 receives the heat from the upper flat surface portion 811 and is mixed with the refrigerant liquid stored on the lower flat surface portion 812 side to be lowered in temperature. At the same time, the refrigerant liquid stored also from the lower flat surface portion 812 receives heat.

  Therefore, the sealed space of the first heat receiving member 81 is made as small as possible on the upper flat surface portion 811 side in order to increase the flow velocity in the flow of the refrigerant liquid and increase the heat receiving effect. Preferably, on the upper flat surface portion 811 side, the closed space on the lower flat surface portion 812 side is made as large as possible in order to exert a capacitor function by mixing the received refrigerant liquid with the stored refrigerant liquid. It is preferable to form.

  Further, the refrigerant liquid flowing out from the outlet 815 of the first heat receiving member 81 is passed through the second heat receiving member 82 thermally connected to the CPU 6, and is again received from the CPU 6, and further the heat radiating member 83. Is circulated through the air and radiated by the outside air.

  Here, since the amount of heat generated by the HDD 3 is generally smaller than the amount of heat generated by the CPU 6, the positional relationship between the first heat receiving member 81 with respect to the HDD 3 and the second heat receiving member 82 with respect to the CPU 6 is the amount of heat received by the refrigerant liquid. In consideration of the allowable amount, as indicated by the white arrow in FIG. 1, the upstream side in the flow of the refrigerant liquid with respect to the second heat receiving member 82 that receives the first heat receiving member 81 that receives heat from the HDD 3 from the HDD 3. It is preferable to provide in.

  Next, the shape of the first heat receiving member 81 will be described. For example, the case where the shape of the hard disk is the HDD 3 with a 3.5 inch diameter disk size will be described as an example. Since the outer shape of the HDD 3 is about 145 mm × about 100 mm × about 20 mm, the flat portion (811, 812) of the first heat receiving member 81 that is thermally connected to the HDD 3 and includes the HDD 3 is provided. The shape is at least twice as large (29,000 mm 2) as at least about 145 mm × about 100 mm (area: 14,500 mm 2).

  On the other hand, since the tank capacity for replenishing the refrigerant liquid in the water cooling device 8 is preferably about 130,000 mm 3 in the permeation state in the general connection tube material and shape, the first heat receiving member 81 is used. The shape between the opposing planes forming the internal space of the HDD 3 may be about 5 mm, and does not cause a particular increase in the sealed box of the HDD 3.

  That is, since it is possible to store the refrigerant liquid having a capacity necessary for operating the electronic apparatus 1 for a predetermined period without replenishing the refrigerant liquid, it is not necessary to have a dedicated tank. Therefore, the electronic device 1 can be downsized.

  Next, the function of suppressing the noise of the HDD 3 in the cooling device 8 having the cooling function of the present invention as described above will be described. FIG. 3 is a diagram schematically illustrating a function of suppressing noise in the first heat receiving member of the present invention.

  In FIG. 3, (c) is a diagram schematically showing the structure of the first heat receiving member 81 in the present invention, and (a) and (b) explain the noise suppressing effect of the present invention. It is the figure which showed the different structure for for comparison typically.

  The hatched portions shown in FIGS. 3A, 3B, and 3C are structures made of a metal material having excellent thermal conductivity. For example, (a) assumes a heat sink as a metal heat receiving member, and (b) assumes a heat sink that allows cooling air to flow through a thin metal heat receiving member space. (C) assumes the heat receiving member which flows a refrigerant | coolant liquid through the thin metal heat receiving part space of this invention.

  In each structure, the left side from the left wall is the inside of the substantially sealed box, and the right side from the right wall is the outside of the substantially sealed box. The HDD 3 is included in the left wall surface, and the white arrow (I) indicates the noise generated from the HDD 3. That is, the incident sound incident on the wall surface of the first heat receiving member 81 is shown.

Here, the relationship between the noise (incident sound) (I) of the HDD 3 and the noise (transmitted sound) (T) leaking through the substantially hermetically sealed box is expressed by equation (1).
T = IR−h (1)
R: Reflected sound
h: Sound absorption (transmission loss)
This shows that the reflected sound (R) and the sound absorption (h) should be increased in order to suppress the leakage of the HDD 3 to the outside of the substantially sealed box (reduce the transmitted sound).
Further, the transmission loss (h) is expressed by equation (2).
h = 10 log 10 (1+ (ωm cos θ / 2ρc) 2) (2)
m: surface density
ρ: Air density
c: speed of sound
θ: Incident angle Therefore, the transmission loss (h) of the homogeneous integrated material as shown in (a) indicates that the sound insulation effect increases as the mass of the material increases (the law of mass). For this reason, it is inevitable that the mass becomes very large in order to obtain a large sound insulation effect. Further, since the reflected sound is very large and may resonate inside the substantially sealed space, it is not a suitable method.

  On the other hand, in order to obtain a relatively light weight and a large transmission loss, it is said that a double structure composite structure is effective. In the double structure, the characteristics of the transmission loss are greatly different depending on the rigidity of the material provided in the intermediate layer, and when the flowing refrigerant is air (b) and the cooling liquid (c). In the case of a homogeneous material, it is close to (a) and approximates the law of mass. That is, by causing the refrigerant liquid to flow through the first heat receiving member 81, the sound insulation effect of the HDD 3 by the substantially sealed box can be improved.

  With the structure of the first heat receiving member 81 as described above, it is possible to provide the electronic device 1 in which the heat generation and noise of the HDD 3 are suppressed by a simple and small configuration.

It is a schematic block diagram which shows one Embodiment of the electronic device in this invention. It is a block diagram which shows notionally one Example regarding the structure for performing the sound insulation and cooling of HDD mounted in the electronic device in this invention. It is the figure which demonstrated typically the structure which suppresses the noise in the 1st heat receiving member of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Electronic device, 2 ... Housing | casing, 3 ... Hard disk drive device (HDD), 4 ... Optical disk drive device, 5 ... Circuit board, 6 ... CPU, 7 ... Power supply, 8 ... Cooling device, 81 ... 1st heat receiving member , 82 ... Heat dissipation member, 83 ... Piping (group), 84 ... Pump, 85 ... Second heat receiving member, 816 ... Base body, 817 ... Cover body, 814 ... Inlet, 815 ... Outlet, 818 ... Pressing member housing Body, 816 ... base body, 817 ... cover body, 814 ... inflow port, 815 ... outflow port, 818 ... pressing member

Claims (4)

In an electronic device equipped with a sound generation heating member that generates sound and generates heat, and a cooling device that cools the sound generation heat generation member,
The cooling device that cools the sound generating heat generating member is a liquid age type cooling device that performs heat conversion and heat transfer by connecting a heat receiving member and a heat radiating member with a plurality of pipes to circulate and flow a refrigerant liquid,
At least one of the heat receiving members forms a part of a substantially hermetically sealed box structure including the sound generating heat generating member by engagement with a storage base,
The heat receiving member forming a part of the box structure has a double-structured sealed space, and constitutes a tank function for storing the refrigerant liquid, and the sound generation heat is generated on the inner wall surface of a part of the box structure. A structure that constitutes a heat receiving portion function that is thermally connected to the member and is received by the refrigerant liquid flowing through the inside of the double-structured sealed space;
The heat of the sound-generating heat generating member is cooled by a part of the heat receiving member of the box structure and the refrigerant liquid that flows and stays in the heat receiving member.
An electronic apparatus, wherein a sound of the sound-generating heat generating member is suppressed by a part of the heat receiving member of the box structure and the storage base. The electronic device according to claim 1,
The substantially hermetically sealed box is configured by engaging the heat receiving member made of a metal material having excellent thermal conductivity and a storage base on which the sound generating heat generating member is mounted and movable forward and backward. Electronic device characterized by being made. In an electronic device having a heat generating device such as a hard disk drive,
A double-layered box heat receiving portion substantially including the heat generating device;
A heat dissipating part for cooling the cooling medium flowing through the box heat receiving part;
A refrigerant circulation part for circulating the cooling refrigerant between the box heat receiving part and the heat dissipation part,
The box body heat receiving unit is configured to soundproof and store the heat generating device, and a cooling medium flows through a double-structured sealed space, and the heat generating device is thermally connected to an inner wall surface of the box heat receiving unit. The generated heat is received by the cooling medium. The electronic device according to claim 3,
The box heat receiving portion connects a first space thermally connected to a heat generating surface of the heat generating device, a second space facing the heat connecting surface, and a third space connecting the first and second spaces. A double-structured concave base body comprising a space through which a cooling medium flows from the first space through the third space to the second space;
An electronic apparatus comprising: a cover body that houses the base body.

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