JP2005061690A - Thin flow passage forming body, temperature control device using the same, information equipment using the same, and manufacturing method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thin flow passage forming body for a compact temperature control device having high temperature control efficiency and easy to be manufactured and fitted, and to provide the temperature control device having a long service life without generating deterioration even in the case of using for a long time. <P>SOLUTION: A flow passage is provided with a first and a second sheets and a bulkhead formed between the first and the second sheets, and formed to include a part of the first and the second sheets as the inner wall. At least one of the first and the second sheets includes a layered structure of a metal layer and a resin layer. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a thin channel forming body, a temperature control device using the same, an information device using the same, and a manufacturing method thereof.

  In recent years, downsizing, integration, and weight reduction of electronic devices have been promoted, and it has become a big issue to suppress generated heat. There is an increasing demand for miniaturization and weight reduction of the temperature control mechanism.

  In addition, the demand for downsizing, integration, and weight reduction of batteries is increasing.

  For example, temperature control devices such as cooling and heating of CPUs and liquid crystal panels in portable electronic / communication equipment such as small video cameras, mobile phones, and notebook computers are small and light, and are easy to install and have a small installation space. The degree of freedom is also a major issue.

  In addition, it is necessary to mount as much light electrolyte as possible in a limited space of a vehicle body in a vehicle-mounted battery. Moreover, in many cases, a temperature control mechanism is required as a safety device for preventing a rapid increase in temperature due to rapid occurrence of the electrolytic reaction. It is also desirable to control the temperature in the raw material supply section such as a fuel cell.

Therefore, for example, a structure using a water cooling mechanism for a heat radiating part of a notebook personal computer has been proposed (see Non-Patent Document 1). A water cooling jacket made of an aluminum alloy is closely attached to a microprocessor, a graphics drawing LSI, etc. so as to receive heat, and the cooling liquid in the water cooling jacket is transferred to the heat radiating panel on the back of the display by a pipe or a flexible tube. Try to move the heat. Since this structure is a structure in which heat is transferred by a pipe or a flexible tube, it is considered that the structure has a high degree of freedom and is easy to process.
Nikkei Electronics, July 15, 2002, page 134

However, since this water cooling mechanism has a structure in which a fluid flows by sealing with an O-ring, the sealing structure is complicated, and the shape processing of the rubber constituting the sealing member and the like needs to be highly accurate, and the cost There was a problem that hindered the reduction. In addition, there is no problem of sealing in a structure in which pipes are complicatedly wired, but there is a problem that the processing cost is high because the shape is complicated.
Further, in addition to downsizing, lightening, and thinning of electronic devices, demands for high performance are increasing, and further improvement in efficiency, miniaturization, and thinning have been desired.

  Furthermore, it is desirable to use ethylene glycol, propylene glycol, or the like as the heat exchange medium only from the viewpoint of thermal efficiency, but if the metal surface is exposed, the flow path may be deteriorated.

  In addition, the fluid may freeze and expand due to a sudden temperature change or pressure increase during use, and stress may be applied to the flow path, resulting in cracks and the like.

  The present invention has been made in view of the above circumstances, and provides a thin flow path forming body that constitutes a temperature control device that has high strength, high temperature control efficiency, is easy to manufacture and attach, and can be miniaturized. With the goal.

It is another object of the present invention to provide a long-life temperature control device that does not deteriorate even when used for a long time.
It is another object of the present invention to provide an electronic device with good heat dissipation and high reliability.
It is an object of the present invention to provide a method for producing a thin channel forming body that is easy to manufacture and highly reliable.

  Therefore, the thin channel forming body of the present invention includes first and second sheets and a partition formed between the first and second sheets, and one of the first and second sheets. A flow path is formed so as to include a portion as an inner wall, and at least one of the first and second sheets includes a laminated structure of a metal layer and a resin layer.

  According to such a configuration, since at least one of the first and second sheets having a laminated structure of a metal layer and a resin layer is overlapped and the flow path is formed only by partial joining, the strength is high. It is possible to provide a small and lightweight and highly efficient thin channel forming body with an extremely simple configuration with few components. Further, since the flow path is formed along the surface of the sheet, the fluid is efficiently circulated in the flow path. In addition, the sheet can be increased in strength by adopting a two-layer structure. However, depending on the flow path design, sealing material, and sealing conditions, the stress can be suppressed to increase the strength and the sealing performance is also long. The flow path can be formed. Furthermore, since the sheet is formed only by overlapping the sheets, the assembly can be easily performed without any positional deviation during the assembly.

  It should be noted that by configuring the metal layer not to be exposed on the inner wall of the flow path, corrosion of the flow path structure due to fluid can be avoided. Further, it is possible to prevent exposure to air during storage before processing, thereby preventing alteration of the metal layer.

Further, at least one of the first and second sheets is configured such that the metal layer is exposed on the inner wall of the flow path, thereby improving thermal conductivity, and when used in a temperature control device, The heat exchange efficiency is improved. The partition wall is a spacer sandwiched between the first and second sheets, and the flow path is formed by the first or second sheet and the spacer. It is characterized by being a space.

  According to such a configuration, the partition (spacer) constituent material is made of a material having good shape support, and the first and second sheets are made of a material having higher flexibility. It is possible to form a thin and highly reliable thin channel forming body.

  The partition wall is formed by a joint portion formed by being partially joined by overlapping the flexible first and second sheets, and the flow path is formed by the first and second flow paths. It is characterized by being surrounded by a non-joining part with the sheet and the joining part.

  According to such a configuration, it is possible to form a thin channel forming body that is simple in structure, lightweight, and easy to manufacture.

  Desirably, the 1st or 2nd sheet | seat forms the unevenness | corrugation in the said flow-path part, It is characterized by the above-mentioned. The unevenness is formed without depending on the flow path, and is desirably smaller than the flow path pitch.

  According to such a configuration, the contact area with the fluid flowing through the flow path portion increases. Therefore, it is possible to provide a thin channel forming body capable of forming a temperature control device with high heat exchange efficiency.

  Desirably, if the first and second sheets have unevenness on the entire surface, the heat exchanger efficiency is also increased at the joint portion surrounding the flow path portion, and a thin flow path forming body with higher heat exchange efficiency is formed. It becomes possible to do.

  Desirably, if the first and second sheets are formed to have irregularities formed along the flow path portion, the fluid flowing in the flow path portion can be smoothly flowed without stagnation. Thus, it is possible to form a thin channel forming body having a long life and high reliability.

  Desirably, if at least one of the first and second sheets is composed of a three-layer structure of a protective layer, a metal layer, and a seal layer, the presence of the metal layer and the protective layer Further, the sealing property (air tightness) becomes high.

  In addition, if the second sheet is composed of a two-layer structure of a protective layer and a metal layer, the presence of the metal layer and the protective layer provides a high sealing property and is in contact with the fluid without a sealing layer. The exchange efficiency will be good. Here, the sealing layer means a resin layer used as an adhesive layer or a layer for hermetic sealing. The seal layer acts to form a joint and enhance the adhesion between the sheets.

Moreover, you may equip both the 1st and 2nd sheet | seat with the sealing layer.
Alternatively, the seal layer pattern may be formed only at the joint.

  In addition, as the protective layer, any of PP resin, PE resin, polyamide resin, PET resin, ABS resin, methylpentene, polyester elastomer, fluorine resin, and polyurethane resin can be used.

  In addition, it is desirable to use a material mainly composed of aluminum as the metal layer, which can reduce the weight. In addition, aluminum is highly malleable, and it is possible to form a thin channel forming body that can be uniformly thinned and has high sealing properties. For example, iron-containing aluminum is preferable.

  Desirably, if the uneven pitch is formed smaller than the width of the flow path portion, the contact area with the fluid in the flow path increases, and when used as a temperature control device, the heat exchange efficiency is further increased. Can do.

  Preferably, the sealing layer is made of any one of polypropylene (PP) resin, polyethylene (PE) resin, polyamide resin (for example, nylon (registered trademark)), ABS resin, methylpentene, polyester elastomer, and polyurethane resin. And

  When a polypropylene resin is used as the seal layer, the bonding processability is good, and the resulting thin channel forming body is excellent in heat resistance.

  When a polyethylene resin is used as the sealing layer, the resulting thin channel forming body is somewhat heat resistant, but adheres at a low temperature and has good bonding processability.

  When nylon (registered trademark) is used as the sealing layer, the bonding temperature is high, but the resulting thin channel forming body is somewhat excellent in heat resistance.

  When polymethylpentene is used as the sealing layer, the melting point is high, but the resulting thin channel forming body is excellent in hot water resistance and steam resistance.

  When a polyester elastomer is used as the seal layer, it is excellent in bending fatigue and can improve the deformation resistance of the film. The operating temperature range is as wide as -70 ° C to 140 ° C.

  The materials that can be used as protective layers for the first and second sheets and the materials that can be used as spacers are shown in the following Table 1 together with the materials used for the sealing layer.

また、本発明の温度制御装置は、上記薄型流路形成体に形成された前記流路に熱交換媒体を流すように構成され、前記第１および第2のシートの少なくとも一方と、前記熱交換媒体との間で、熱交換をするように構成されたことを特徴とする。

Further, the temperature control device of the present invention is configured to flow a heat exchange medium through the flow path formed in the thin flow path forming body, and the heat exchange with at least one of the first and second sheets. The heat exchanger is configured to exchange heat with the medium.

  According to this configuration, it is possible to provide a temperature control device that is lightweight and has high heat exchange efficiency.

  Preferably, the first sheet is formed to have higher thermal conductivity than the second sheet, and the first sheet exchanges heat with the heat exchange medium. It is characterized by comprising.

  According to such a configuration, it is possible to improve the heat exchange efficiency.

  Moreover, it is desirable to form an electronic device using the temperature control device.

  Further, the electronic device is an information device including a heat generating part in a main body part or a lid, and the temperature control device is mounted on an outer surface side of the main body part or the cover, and heat from the heat generating part. It is configured to dissipate heat to the outer surface of the main body or the lid through a heat medium, and the first sheet is disposed to be located on the outer surface of the lid. To do.

  According to such a configuration, heat can be selectively radiated to the outer surface side, so that the heat exchange efficiency is improved.

  Moreover, the manufacturing method of the thin flow-path formation body of this invention forms a sealing layer in at least one of the flexible 1st and 2nd sheet | seat comprised by the laminated structure of a metal layer and a resin layer. A space formed by a step, a step of overlapping the first and second sheets such that the seal layer is located inside, and a space formed by the first and second sheets and a joint portion thereof, And a step of joining the first and second sheets by selectively heat-melting the sealing layer to form a joining portion to be a partition wall.

  According to such a configuration, it is possible to easily form a thin channel forming body that is light with good controllability and excellent in mounting.

  Further, in the method for producing a thin channel forming body according to the present invention, a seal layer pattern is formed on at least one of the flexible first and second sheets composed of a laminated structure of a metal layer and a resin layer. A space formed by the step of stacking the first and second sheets so that the seal layer pattern is positioned on the inside, and the first and second sheets and their joints are flowable. A step of joining the first and second sheets by heating and melting the seal layer pattern so as to form a path, and forming a partition wall corresponding to the seal layer pattern. To do.

  According to such a method, the pattern of the seal layer may be formed by punching or the like, and this may be bonded to a sheet and bonded, and the metal layer is exposed on the entire inner wall of the flow path, and the heat exchange characteristics are excellent. A thin channel forming body can be formed. The pattern of the seal layer may be formed by a coating method after attaching a metal foil constituting the metal layer to a resin sheet constituting the resin layer.

The seal layer is preferably made of a thermoplastic resin. According to such a configuration, if the heating is performed while applying pressure, the bonded portion is securely fixed so that no space remains, and a highly reliable thin channel forming body can be formed.
Furthermore, it is desirable that the seal layer is made of a thermosetting resin. According to such a configuration, it is possible to form a highly reliable thin channel forming body that is securely fixed by heating while being pressurized.

  According to the present invention, it is possible to form a thin flow path forming body that can constitute an extremely light, thin, and low-cost temperature control device.

  Further, in manufacturing, a thin flow path forming body that is easy to manufacture and highly reliable can be obtained by stacking two sheets, sandwiching them in a mold having a groove corresponding to the flow path, and pressurizing and fixing. It becomes possible to form.

Next, an embodiment of the present invention will be described.
(First embodiment)
Hereinafter, the thin channel forming body and the manufacturing method thereof according to the first embodiment of the present invention will be described.

  This thin channel forming body 1 is used as a cooling device for flowing ethylene glycol through the channel to dissipate the heat of the CPU of the laptop personal computer. FIG. 1 is a perspective view and FIG. FIG. 3 is a perspective view of a mold for forming, and as shown in FIG. 3, a thickness L = 300 mm, a width W = 30 mm, and a thickness t = 65 μm thick inside an iron-containing aluminum laminate sheet. The first and second sheets 2 and 3 made of a flat sheet formed with a sealing layer 2a and 3a made of 20 μm polyethylene resin are stacked and sandwiched between molds (molds), and the groove of the mold is removed. In the region, the mold is brought into contact with the sheet, and the seal layers 2a and 3a of the first and second sheets are partially thermocompression bonded and bonded together.

  The first sheet 2 is formed by laminating a protective layer 2P made of a polyethylene terephthalate (PET) film having a thickness of 25 μm and an iron-containing aluminum 2m having a thickness of 40 μm and forming a sealing layer 2a made of polyethylene over the entire surface. It will be.

  On the other hand, the second sheet 3 is formed by laminating a protective layer 3P made of a polyethylene terephthalate (PET) film having a thickness of 25 μm and an iron-containing aluminum 3m having a thickness of 100 μm and forming a sealing layer 3a made of polyethylene on the entire surface. It is made.

  In the thin channel forming body formed in this way, the first and second sheets 2 and 3 are bonded to each other except for the convex portion protruding outward so as to form the channel portion 4. 7 is formed. And the space formed between the convex part of the 1st sheet 2 and the convex part of the 2nd sheet | seat 3 by using this junction part 7 as a partition comprises the flow-path part 4, and a flow path is one end of a flow-path part. The fluid supply port 5 and the fluid discharge port 6 are provided at the other end so that the inner wall of the flow path portion 4 is entirely covered with the seal layers 2a and 3a.

  Then, heat exchange is performed between the seat surface and the fluid (not shown) by circulating ethylene glycol as a fluid in the flow path portion 4 through the fluid supply port 5 and the fluid discharge port 6. ing.

  In addition, since the film thickness of iron-containing aluminum is larger, the second sheet has better heat dissipation than the first sheet.

  The film thickness of the seal layer is not particularly limited, but is conveniently 10 to 100 μm. If it is less than 10 μm, the role of protection is weak, and if it exceeds 100 μm, the heat dissipation effect is reduced. More desirably, the thickness is 15 to 50 μm.

  Further, the thickness of the protective layer is desirably 10 to 100 μm. If it is less than 10 μm, the role of protection is weak, and if it exceeds 100 μm, the heat dissipation effect is reduced. More desirably, the thickness is 15 to 50 μm.

  The thickness of the metal layer such as iron-containing aluminum is desirably 20 to 100 μm. If it is less than 20 μm, the effect as a protective film is weak, and if it exceeds 100 μm, the flexibility is lowered. More preferably, it is convenient when the thickness is 35 to 80 μm. However, when flexibility is not required, a metal layer having a thickness of 100 to 200 μm may be used. Here, depending on the usage pattern, the protective layer may not be provided.

First, the metal mold | die used here is demonstrated.
As shown in FIG. 2, this die is formed by pressing a press plate 101S made of silicon rubber having a thickness of 4 to 5 mm and having a groove portion 101C corresponding to the flow path portion, and an aluminum plate 101P having a thickness of 2 to 3 mm. A press plate 102S made of silicon rubber with a thickness of 4 to 5 mm and formed with a groove portion 102C corresponding to the flow path portion by press molding in the same manner as the lower mold 101 is attached to the aluminum plate with a thickness of 2 to 3 mm. The upper die 102 is bonded to the plate 102P and includes a heating means (not shown). A sheet is sandwiched between the upper die 102 and the lower die 101 so that the upper die 102 and the lower die 102 are sandwiched. The joining portion 7 is formed by thermocompression bonding of the sheet in the contact area with 101. Then, the space surrounded by these sheets and the joint portion 7 is used as a flow path portion, and the fluid is circulated inside, whereby heat exchange can be performed between the sheet surface and the fluid.

Next, a method for producing a thin channel forming body using this mold apparatus will be described.
In assembling, first, the first and second sheets 2 and 3 are overlapped so that the seal layers 2a and 3a are on the inner side.

  As shown in FIG. 3, the overlapped first and second sheets 2 and 3 are sandwiched between the upper mold 102 and the lower mold 101 of the mold apparatus and heated at 200 ° C. for about 10 minutes while being pressurized. By doing so, regions other than the regions corresponding to the upper and lower recesses 102C and 101C are joined to form the joint 7. Here, one of the open ends of the flow path section 4 is a supply port 5 and the other is a discharge port 6.

Finally, pipes (not shown) are connected to the fluid supply port 5 and the fluid discharge port 6, which are both ends of the flow channel, in parallel with the flow channel or on the same surface to form the thin flow channel shown in FIG. The body is completed.
In this way, the thin channel forming body shown in FIG. 1 is formed.

  The thin channel forming body 1 is formed by a single heat press process, and positioning is not necessary. Moreover, it has a flexible structure and it is attached so that ethylene glycol may be flown as a cooling fluid from the fluid supply port 5 and discharged from the fluid discharge port 6 at the other end.

  This thin channel forming body has a flexible structure, and is attached so that ethylene glycol flows from the fluid supply port 5 and is discharged from the fluid discharge port 6 at the other end. 11 is used to dissipate heat from the CPU attached to the back surface of the display panel 1002 constituting the lid of the laptop personal computer as shown in FIG.

  Here, the display panel 1002 has a liquid crystal display part formed on the inner surface, and the inner surface side of the thin channel forming body is the first sheet side where heat radiation is difficult, and the outer surface side is the second sheet with better heat dissipation. It is arranged to be on the side. As a result, it is possible to improve heat dissipation satisfactorily without increasing the temperature of the liquid crystal display unit. Further, the inner wall of the flow path is all covered with a seal layer, and the metal layer is not corroded by ethylene glycol, and a long-life temperature control device can be configured.

  According to such a configuration, the two sheets are sandwiched between the molds, and only thermocompression bonding is performed at the abutting portion of the mold, so that high-precision positioning is unnecessary, and the structure can be formed very easily by one molding. Is simple and lightweight.

  Moreover, since the flexible package is comprised, it has the characteristic that a shape is flexible and it is easy to mount | wear anywhere.

  In addition, since the flow path portion 4 is formed only by the first and second sheets 2 and 3, the fluid is efficiently circulated in the flow path with few components, and a small, lightweight and highly efficient thin flow path is formed. The body can be provided.

  The fluid supply port and the fluid discharge port are connected to the pipe so as to be perpendicular to the surface on which the flow path is formed, and the fluid supply port and the fluid discharge port are connected to the flow path. The flow path can be formed on a different surface, and a thin flow path forming body with less fluid leakage can be provided.

  In addition, after forming a junction part, the inert gas heated by about 180 degreeC is supplied from the supply port 5 which is one side of the opening end of this flow-path part 4, and it discharges | emits from the discharge port 6, and thereby a flow path. Gas may be flowed into the section 4 to stretch the sheets 2 and 3 in the flow path section 4 so that the thicknesses of the first and second sheets 2 and 3 are about 30 μm and 40 μm, respectively.

  Thereby, the cross-sectional area of the flow path part 4 can be expanded without increasing the weight, and the heat exchange efficiency can be increased.

  In addition, prior to the formation of the joint portion, an oval spherical silicone rubber may be used to pressurize the sheet portion on the lower mold 101 shown in FIG. 3 along the flow path portion. As a result, the film is stretched only in the flow path portion, the film thickness is partially reduced, and the heat transfer efficiency is improved. Moreover, the cross-sectional area of the part used as a flow path becomes large, and there also exists an effect that an upper and lower film becomes difficult to adhere | attach at the time of thermocompression bonding.

  Moreover, since all the inner walls of the flow path part 4 are covered with the seal layers 2a and 3a, corrosion by a fluid can be avoided, and a long-life thin flow path forming body can be provided.

  In the first embodiment, the exterior container uses two flexible sheets, and seals the peripheral portion and the region that becomes the tube wall by thermocompression bonding to form the joint portion 7 and remains. Although the region is used as the flow path portion 4, a sheet in which a seal layer is formed in a half region may be folded into a bag shape and sealed.

  At this time, it is desirable that the surrounding sealing layer be particularly strong. For example, the surrounding sealing layer may be formed using another resin. Further, another frame body may be attached only at the periphery to improve the sealing performance. When used in a normal temperature control device, even if a slight seal is lost between the flow paths, it does not affect other component devices, but leakage to the outside must be avoided. On the other hand, since it is desirable for the sheet to have a structure that is as malleable as possible, it is desirable that the seal layer be thinner.

  Moreover, in the said embodiment, the 1st and 2nd sheet | seat arrange | positions a protective layer and a sealing layer on a metal film, heat-presses, and integrates and uses it. Here, an aluminum sheet formed with a PET protective layer is used, but the protective layer may be omitted. Moreover, although polyethylene was used as the sealing layer, other thermoplastic resins such as polypropylene and EVA may be used. Further, a thermosetting resin such as an epoxy resin may be used.

In addition to PET, other protective films such as nylon (registered trademark) may be used as the protective layer.
Further, if the fluid supply port and the fluid discharge port are provided in a plane parallel to the surface on which the flow path is formed, a natural flow is formed. This is particularly effective when the fluid used is highly viscous.

Furthermore, if the sealing property can be ensured by the protective layer, the metal layer may be configured so as to have a partial cutout and form a pattern.
Furthermore, in the above-described embodiment, since iron-containing aluminum is used, it is characterized in that it is lightweight, rich in malleability, and has good workability. However, copper or the like can also be used.

  The two sheets have the same structure and are configured by changing only the film thickness of the iron-containing aluminum layer, but may have different structures. For example, if the second sheet is configured to have higher rigidity than the first sheet, the desired shape can be secured on the flat plate having higher rigidity, and on the other hand, stress can be absorbed, While maintaining the degree of freedom, it is possible to maintain a high strength state.

  Furthermore, in the above embodiment, the seal layer 3a is formed on the entire surface of the second sheet. However, if the seal layer is formed so as to form a predetermined pattern, the flow exposed from the seal layer will be described. There is an advantage that the iron-containing aluminum having high malleability in the passage is easily in a free state, and the diameter of the passage is easily increased.

(Second Embodiment)
Next, a second embodiment of the present invention will be described.
Moreover, in the said embodiment, although the 1st and 2nd sheet | seat surrounding a flow-path part became a smooth surface, as shown in FIG. 4, fine unevenness | corrugation is formed in the flow-path part 4 in this example. The heat exchange efficiency is improved.

  Other parts are the same as those in the first embodiment, and the same parts are denoted by the same reference numerals.

  Also in the present embodiment, the first and second sheets are formed in a laminated structure of a resin layer and a metal layer.

  In manufacturing, as shown in FIG. 5, the mold device is different from the first embodiment in that the upper and lower grooves 102C and 101C of the mold device are formed with irregularities. Others are similarly formed.

The thermal resistance R _{th of the} sheet is R _th = 1 / (A · λ)
Where l is the sheet thickness (m), A is the surface area (m ² ), and λ is the material thermal conductivity (w / (m · K)).

  In addition, the thermal resistance R of the sheet when laminated with a plurality of materials is

で表される。

It is represented by

  For a sheet with a protective layer of 25 μm, a metal layer of 50 μm, and a seal layer of 50 μm, the surface area can be increased by 10% per unit area by providing minute irregularities, and the thermal resistance can be reduced by about 15% if the seal layer is made 5 μm thinner. .

Thus, according to this configuration, the heat exchange efficiency is greatly improved.
In addition, since the first and second sheets are formed in a three-layer structure, a decrease in strength due to the formation of irregularities is compensated by lamination, and heat exchange efficiency can be improved without a decrease in strength.

(Third embodiment)
Next, a third embodiment of the present invention will be described.
In the second embodiment, fine irregularities are formed only in the flow path section 4, but in this example, as shown in FIG. 6, the sheets 12 and 13 having fine irregularities formed on the entire sheet surface are used. By increasing the surface area of the surface of the joint 7 as well, further heat exchange efficiency is increased.

In this example, the mold apparatus is the same as that used in the first embodiment, and the embossed sheets 12 and 13 as shown in FIG. It is formed using.
Also here, since the first and second sheets are formed in a laminated structure of a resin layer and a metal layer, the reduction in strength due to embossing is compensated by lamination.

  That is, as shown in FIG. 7, it is formed by supplying the embossed sheets 12 and 13 in an overlapping manner using the same mold apparatus as that used in the first embodiment.

  Here, as shown in FIGS. 10A to 10C, the first and second flat sheets 2 and 3 formed in the same manner as the first and second sheets are rolled. Roll processing is performed between R1 and R2, and irregularities are formed on the surface. Here, the first and second sheets 2 and 3 are formed in the same manner as the sheet used in the first embodiment, but the first sheet does not form a seal layer on the inner surface, and the iron-containing aluminum layer. Suppose that it is comprised by 2 layer structure of 2m and the protective layer 2p.

According to such a configuration, since the unevenness is formed on the entire surface of the thin channel forming body, the heat exchange efficiency is greatly improved.
In this way, it is possible to form a thin channel forming body from two sheets very easily.

  The irregularities on the surface can be changed as appropriate as shown in FIGS.

  Further, as shown in FIGS. 9A and 9B, the surface area inside and outside the flow path may be increased by forming a quadrangular pyramidal protrusion or a truncated cone protrusion. it can. Further, those having hemispherical protrusions or those having irregularities parallel to the flow path as shown in FIG. 9C are also effective.

  In addition to the above-mentioned surface area increasing effect, if the irregularities are formed in parallel to the flow path over the entire length of the flow path, fluid can be smoothly flowed, which prevents clogging and forms a long-life and highly reliable thin flow path. The body is formed.

In the above-described embodiment, the method of forming one by one has been described. However, a large number of thin sheets are formed at once using a large mold apparatus, and a large number of thin channel forming bodies are formed. You may do it.
Furthermore, a large sheet may be piled up, and the joint portion may be continuously formed while being sequentially fed through the mold apparatus, and finally cut and divided.

In this example, the iron-containing aluminum layer, which is a metal layer, is exposed to the flow path on the second sheet side, and the fluid comes into contact with it, so that the thermal conductivity is further improved.
It is also applicable when there is no protective layer as required.

  In addition, in the above-described embodiment, an example in which the thin channel forming body is applied to a temperature control device such as a cooling device has been described. However, for various uses such as a battery, a drip liquid storage tank, and a blood transfusion blood tank Applicable. When used for a fluid having viscosity, the unevenness of the flow path may be adjusted to form parallel unevenness in the flow path so that the fluid flows smoothly.

  In addition, as an intermediate layer, a filter may be sandwiched and three sheets may be pressure-bonded to form a joint portion to form a two-layer flow path so that fluid can move between the upper layer and the lower layer.

  In addition, the intermediate layer is used as a separator, the first and second sheets are conductive sheets, the junctions are formed and the flow paths are formed while maintaining the insulating properties of the first and second sheets. If the thin channel forming body is formed, the first and second sheets can be used as the outer container, the anode and the cathode, and can be used as a thin and light battery.

(Fourth embodiment)
Hereinafter, a thin channel forming body according to a fourth embodiment of the present invention will be described.
In this thin channel forming body 1, a channel portion 4 is formed by laminating a first sheet 2 in which a recess is formed in advance by embossing and a second sheet 3 on which a pattern of a seal layer 2a is adhered. It is characterized by this. That is, as shown in the perspective view of FIG. 12 and the perspective view of the constituent members in FIG. 13, the recess 4V is formed by embossing with a length L = 300 mm, a width W = 30 mm, and a thickness t = 0.05 to 2.0 mm. The first sheet 2 made of an aluminum laminate sheet and a flat plate-like second sheet 3 made of the same material and having a seal layer 3a formed on the inside thereof are formed by overlapping these concave portions. Except for 4V, the first and second sheets 2 and 3 are joined together to form a joint 7, and this is used as a partition to be formed between the recess 4 </ b> V of the first sheet 2 and the second sheet 3. The flow path portion 4 constitutes a flow path portion 4, and is provided with a fluid supply port 5 at one end of the flow path and a fluid discharge port 6 at the other end so as to be parallel to the flow path.

And since the sealing layer is provided only in the junction part used as the partition of a flow path, the metal layer is exposed to the whole flow path, and a heat conductive characteristic is favorable.
The first sheet 2 is formed by laminating a protective layer 2P made of a polyethylene terephthalate (PET) film having a thickness of 20 μm and aluminum 2m having a thickness of 70 μm.

On the other hand, the second sheet 3 is formed by laminating a protective layer 3P made of a polyethylene terephthalate (PET) film having a thickness of 20 μm and an aluminum 3m having a thickness of 100 μm, and a sealing layer 3a made of polyethylene (PE) on the entire surface. It is formed.
The thickness of the protective layer is preferably 10 to 100 μm. If it is less than 10 μm, the role of protection is weak, and if it exceeds 100 μm, the heat dissipation effect is reduced.

  At the time of assembly, these two sheets are stacked so that the sealing layer 3a comes inside, and heated while being pressed, so that the bonding is performed except for the region where the pattern of the recesses 4V formed by embossing is present. To do. As a result, a space is formed between both sheets except for the joint portion 7, and the flow path portion 4 is formed.

  Finally, a pipe (not shown) is connected to one end of the flow path in a direction parallel to the flow path and to the fluid supply port 5 and to the fluid discharge port 6 at the other end. Complete.

  The thin channel forming body 1 has a flexible structure as a whole, and is attached so that cooling water flows from the fluid supply port 5 and is discharged from the fluid discharge port 6 at the other end. 11 is used to dissipate heat from the CPU attached to the back surface of the display panel 1002 of the notebook personal computer as shown in FIG.

  According to such a configuration, it can be formed by two sheets, and the structure is simple and lightweight. Moreover, since the flexible package is comprised, it has the characteristics that it is easy to mount anywhere and is lightweight. In addition, since the flow path portion 4 is formed only by the first and second sheets 2 and 3, the fluid is efficiently circulated in the flow path with fewer components, and the compact and lightweight and highly efficient thin flow path forming body. Can be provided.

  Further, since the fluid supply port and the fluid discharge port are provided in a plane parallel to the surface on which the flow path is formed, a natural flow is formed.

  In the first embodiment, the outer container uses an embossed sheet and another flexible sheet, the peripheral portion and the region that becomes the tube wall are sealed, and the remaining region flows. Although used as the path portion 4, a single sheet embossed on half may be folded into a bag shape and sealed. According to such a structure, the flow path can be formed only by sealing the adhesion region constituting the outer peripheral portion and the tube wall.

  In the above-described embodiment, the first and second sheets are used by integrating a protective film and a sealing layer on a metal film and heating and pressing. Here, an aluminum sheet formed with a PET protective layer is used, but the protective layer may be omitted. Moreover, although polyethylene was used as the sealing layer, other thermoplastic resins such as polypropylene and EVA may be used. Further, a thermosetting resin such as an epoxy resin may be used.

In addition to PET, other protective films such as nylon (registered trademark) may be used as the protective layer.
Further, since the embodiment uses aluminum, it is characterized in that it is lightweight, has excellent malleability, and has good workability. However, copper or the like can also be used.

  The two sheets have the same structure. On the other hand, for example, if the second sheet is configured to be more rigid than the first sheet, the desired shape is secured on the plate with the higher rigidity. On the other hand, stress can be absorbed, and the strength can be maintained while maintaining the degree of freedom of shape.

  Furthermore, in the above embodiment, the seal layer 3a is formed on the entire surface of the second sheet. However, a pattern of the seal layer may be formed only on the protruding portion of the first sheet. . Thereby, a flow path can be reliably formed with high positional accuracy.

(Fifth embodiment)
Next, a fifth embodiment of the present invention will be described.
In this example, as shown in FIG. 14, a polypropylene (PP) spacer 8 having a shape corresponding to the flow path is formed as a separate part, and the spacer 8 is formed by two sheets serving as an outer container at the time of mounting. They are sandwiched and mounted. In the present embodiment, the flow path can be freely set according to the shape of the spacer.

  The thin flow path forming body of the present embodiment is made of aluminum films 12m and 13m, and the groove pattern 14 serving as the flow path is formed by the first and second sheets 12 and 13 having the sealing layers 12a and 13a formed on the back surface. A flow path is formed by sandwiching a spacer 8 made of the formed aluminum plate. A fluid supply port and a fluid discharge port (not shown) are attached to the openings 15 and 16 of the flow path so as to be located in a plane parallel to the flow path forming surface.

This spacer is formed by pressing (embossing) or etching. According to the etching process, it is possible to form a fine pattern with higher accuracy.
According to this configuration, it is possible to provide a cooling device that is small, lightweight, and has high thermal efficiency.

In addition, the spacer may be formed integrally with one of the two sheets, so that the assembly can be easily performed without any positional deviation during the assembly.
Furthermore, if the exterior container is made of a film material that is thinner and more flexible, the degree of freedom of shape is further increased.

  In the above embodiment, the seal layer is preferably formed as a pattern formed corresponding to the spacer position so as to coincide with the spacer pattern. As a result, an adhesive does not adhere to unnecessary portions, and a highly reliable connection is possible.

(Sixth embodiment)
Next, a sixth embodiment of the present invention will be described.
In this example, as shown in FIG. 15, the spacer 18 made of ABS resin is formed as a separate part, and is composed of a plate-like body formed so as to have a concave portion 14S on at least one surface. The spacers 18 are sandwiched between the sheets (first and second sheets 12 and 13) and mounted. Thereby, a flow path can be freely set by the shape of a spacer.

  The formation of the recesses 14S in the spacer 18 may be performed by pressing (embossing) or half etching.

  Furthermore, the fluid may also flow between the first sheet and the spacer 18. Moreover, you may make it fill with fillers with high heat conductivity, such as grease. Furthermore, when used for heating, a material having a large heat capacity may be filled.

  As described above, according to the present invention, it is possible to form a thin channel forming body that can constitute a very light, thin, and low-cost temperature control device. It is effective for use in temperature control devices such as cooling and heating for CPUs and LCD panels in portable electronic devices.

1 is a view showing a thin channel forming body according to a first embodiment of the present invention. It is a figure which shows the metal mold | die apparatus used for formation of the said thin flow-path formation body. It is assembly explanatory drawing of the same thin channel formation body. It is a figure which shows the thin flow-path formation body of the 2nd Embodiment of this invention. It is a figure which shows the metal mold | die apparatus used for formation of the said thin flow-path formation body. It is a figure which shows the thin flow-path formation body of the 3rd Embodiment of this invention. It is assembly explanatory drawing of the same thin channel formation body. It is a figure which shows the sheet | seat used for the said thin flow-path formation body. It is expansion explanatory drawing of the sheet | seat used for the said thin flow-path formation body. It is a figure which shows the manufacturing process of the sheet | seat used for the said thin flow-path formation body. It is a figure which shows the laptop microcomputer using the thin flow-path formation body of the 1st Embodiment of this invention. It is a figure which shows the thin flow-path formation body of the 4th Embodiment of this invention. It is assembly explanatory drawing of the same thin channel formation body. It is a figure which shows the thin flow-path formation body of the 5th Embodiment of this invention. It is a figure which shows the thin flow-path formation body of the 6th Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Thin flow-path formation body 2 1st sheet | seat 3 2nd sheet | seat 2a, 3a Seal layer 2m, 3m Aluminum layer 2p, 3p Protective layer 4 Flow path 5 Fluid supply port 6 Fluid discharge port 7 Joint part 101 Lower mold | type 102 Above Type

Claims (16)

The first and second sheets and a partition formed between the first and second sheets are provided, and the flow path is formed so as to include a part of the first and second sheets as an inner wall. In the thin channel forming body formed,
At least one of said 1st and 2nd sheet | seat contains the laminated structure of a metal layer and a resin layer, The thin flow-path formation body characterized by the above-mentioned. The thin channel forming body according to claim 1, wherein the metal layer is configured not to be exposed on the inner wall of the channel. The thin channel forming body according to claim 1, wherein at least one of the first and second sheets is configured such that the metal layer is exposed on the inner wall of the channel. The partition wall is a spacer sandwiched between the first and second sheets, and the flow path is a space formed by the first or second sheet and the spacer. The thin channel forming body according to any one of claims 1 to 3. The partition wall is formed by a joint part formed by being partially joined by overlapping the first and second sheets having flexibility,
5. The thin flow path forming body according to claim 1, wherein the flow path is surrounded by a non-joining portion between the first and second sheets and the joining portion. . 6. The thin flow path forming body according to claim 5, wherein at least one of the first and second sheets has irregularities formed in the flow path portion. The thin film according to any one of claims 1 to 6, wherein at least one of the first and second sheets is formed of a three-layer structure including a protective layer, a metal layer, and a seal layer. A flow path forming body. The thin flow path according to claim 7, wherein the protective layer is any one of PP resin, PE resin, polyamide resin, PET resin, ABS resin, methylpentene, polyester elastomer, fluorine resin, and polyurethane resin. Formed body. The thin channel forming body according to any one of claims 1 to 8, wherein the metal layer is composed of a layer mainly composed of aluminum. 8. The thin flow path forming body according to claim 7, wherein the seal layer is any one of PP resin, PE resin, polyamide resin, ABS resin, methylpentene, polyester elastomer, and polyurethane resin. A heat exchange medium is configured to flow through the flow path formed in the thin flow path forming body according to any one of claims 1 to 10.
A temperature control device configured to exchange heat between at least one of the first and first sheets and the heat exchange medium. The first sheet is formed so as to have higher thermal conductivity than the second sheet, and the first sheet constitutes a heat exchanging unit that exchanges heat with the heat exchange medium. The temperature control device according to claim 11, wherein The electronic device using the temperature control apparatus of Claim 11 or 12. The electronic device is an information device provided with a heat generating part on a main body or a lid,
The temperature control device is mounted on the outer surface side of the main body or the lid, and is configured to dissipate heat from the heat generating portion to the outer surface of the main body or the lid via a heat medium. ,
The electronic device using the temperature control device according to claim 13, wherein the first sheet is disposed so as to be positioned on an outer surface side of the lid. Forming a sealing layer on at least one of the flexible first and second sheets composed of a laminated structure of a metal layer and a resin layer;
Stacking the first and second sheets so that the seal layer is located inside;
The first and second sheets are selectively heated and melted so that the space formed by the first and second sheets and the joint portion thereof can constitute a flow path. And a step of forming a bonded portion that becomes a partition wall. Forming a seal layer pattern on at least one of the flexible first and second sheets composed of a laminated structure of a metal layer and a resin layer;
Stacking the first and second sheets so that the seal layer pattern is located inside;
The first and second sheets are joined by heating and melting the sealing layer pattern so that the space formed by the first and second sheets and the joint portion thereof can constitute a flow path. And a step of forming a partition wall corresponding to the seal layer pattern.

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