JP2005226931A - Heating device for heat pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heating device for a heat pipe capable of uniformly heating the outer peripheral part of the heat pipe using heat generated from an electric heater, to allow an operating fluid in the heat pipe to flow being heated with the stable heat transfer amount. <P>SOLUTION: This heating device 10 for the heat pipe is a structure composed of a first divided cylindrical body 20 and a second divided cylindrical body 30. The first divided cylindrical body 20 comprises a heat conductor 21 wound around the heat pipe 11; a sheathed heater 23 serving as an electric heater 22 wound around the heat pipe 11 through the heat conductor 21; and a heat insulating structure 13 adjoining the outer periphery of the sheathed heater 23. The second divided cylindrical body 30 comprises a heat conductor 31 wound around the heat pipe 11; a sheathed heater 33 serving as an electric heater 32 wound around the heat pipe 11 through the heat conductor 31; and a heat insulating structure 34 adjoining the outer periphery of the sheathed heater 33. The heating device 10 is further provided with a clamp 16 used as a pressing means 15 for pressing the sheathed heaters 23, 33 to the heat pipe 11 side to compress the heat conductors 21, 31 after allowing the first divided cylindrical body 20 and the second divided cylindrical body 30 to coincide with each other. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a heating device attached to a heat pipe.

  A heat pipe is a simple structure in which a working fluid is put in the pipe. For example, when one end is heated, the working fluid evaporates and moves to the other end, where heat is released and condensed to form a liquid. It is a heat conduction material that repeats returning to

An apparatus including a heating device at one end of such a heat pipe has been proposed (see Patent Document 1).
Japanese Patent No. 2797892 (page 2-3, FIG. 1)

  FIG. 10 is a diagram for explaining a basic configuration of a conventional technique. A heating device 100 includes a heating unit 102 and a heat radiating unit 103 of a heat pipe 101 and an electric heater 104 that is a heating source provided in parallel with the heating unit 102. A heat transfer block 105 for transferring heat, a sandwiching surface 106, 107 between the heat transfer block 105, the heat pipe 101 and the electric heater 104, a divided portion 108 of the heat transfer block 105, and a fastening bolt 109. It is.

Next, the detail of the principal part of this heating apparatus 100 and a heat conductive effect are demonstrated.
FIG. 11 is a cross-sectional view of the main part of FIG. 10, and a gap 110 is generated between the electric heater 104 and the holding surface 107 of the heat transfer block 105 due to variations in manufacturing processing of the heating device 100, A gap 111 may be generated between the heat pipe 101 and the holding surface 106 of the heat transfer block 105.

As a heat conduction action, heat is transmitted through the heat transfer block 105 by the heating of the electric heater 104 and is transmitted to the heat pipe 101. At this time, the upper surface of the electric heater is determined from the distance t1 between the electric heater upper surface portion 112 and the heat pipe bottom surface portion 113. Since the distance t2 between the portion 112 and the heat pipe upper surface portion 114 is larger, the heat pipe bottom surface portion 113 has a higher temperature and the heat pipe upper surface portion 114 has a lower temperature.
In addition, the amount of heat transfer from the electric heater 104 to the heat pipe 101 is reduced by the generation of the gaps 110 and 111.

  As described above, since the heat pipe heating device 100 of Patent Document 1 has a structure in which the heat pipe 101 and the electric heater 104 are arranged side by side, the outer periphery of the heat pipe 101 is caused by a difference in distance from the electric heater 104. Temperature difference occurs, the outer peripheral portion of the heat pipe 101 cannot be heated uniformly, and the heating balance is poor.

  Further, in the heat pipe heating device 100, because of the gaps 110 and 111 generated due to processing variations, the heat generated from the electric heater 104 is affected by heat conduction to the heat pipe 101, and the amount of heat transfer is reduced. There is also a problem.

  The present invention provides a heating device for a heat pipe that can uniformly heat the outer periphery of a heat pipe using heat generated from an electric heater and heat and flow the working fluid in the heat pipe with a stable heat transfer amount. The issue is to provide.

  The invention according to claim 1 is a heating device attached to a heat pipe, and the heating device is made of a material having a cushioning property, and a heat conductor wound around the heat pipe, and the heat pipe via the heat conductor. An electric heater for winding is provided, and pressing means for compressing the heat conductor by pressing the electric heater toward the heat pipe.

  The invention according to claim 2 is characterized in that the electric heater is a divided cylindrical body.

  The invention according to claim 3 is characterized in that at least the outer peripheral surface of the electric heater is covered with a heat insulating structure, and the electric heater is pressed by pressing means through the heat insulating structure.

  The invention according to claim 4 is characterized in that the heat insulating structure and the electric heater are integrated.

  In the invention which concerns on Claim 1, the electric heater which winds the heating apparatus for heat pipes around a heat pipe via the heat conductor which consists of a material which has cushioning property, and this electric heater is pressed to the heat pipe side, and heat conduction is carried out. And pressing means for compressing the body. Since the heat conductor having a cushioning property is employed, manufacturing variations can be absorbed by this heat conductor, the generation of gaps can be eliminated, and heat can be transferred favorably from the electric heater to the heat pipe.

  In addition, since the heat pipe heating device surrounds the heat pipe with the electric heater, there is no temperature gradient in the outer peripheral portion of the heat pipe, and the heat pipe can be made to have an excellent heating balance.

  Accordingly, there is provided a heating device for a heat pipe that can uniformly heat the outer peripheral portion of the heat pipe using the heat generated from the electric heater and heat and flow the working fluid in the heat pipe with a stable heat transfer amount. There is an advantage that you can.

  In the invention according to claim 2, since the electric heater is a divided cylindrical body, the electric heater can be easily attached to the heat pipe and the diameter can be easily reduced. Therefore, it is possible to efficiently remove and attach the electric heater during inspection and repair.

  In the invention according to claim 3, at least the outer peripheral surface of the electric heater is covered with the heat insulating structure, and the electric heater is pressed by the pressing means through the heat insulating structure, so that wasteful heat dissipation from the electric heater to the outer peripheral side is prevented. And a stable amount of heat can be supplied from the electric heater to the heat pipe.

  In the invention which concerns on Claim 4, since the heat insulation structure and the electric heater were made into integral structure, the assembly man-hour at the time of assembling the heating apparatus for heat pipes can be reduced.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.
FIG. 1 is a perspective view of a heating device for a heat pipe according to the present invention. The heating device for a heat pipe 10 is a heat insulating structure 13 or 34 made of urethane, ceramic mold, or the like that matches the outer periphery of the heat pipe 11 with a dividing portion 12. The clamp 16 as the pressing means 15 is fitted from above the groove portion 14 of the heat insulating structures 13 and 34, and the heat insulating structures 13 and 34 are fixed to the heat pipe 11 in a fixed manner.
Although not shown, an electric heater (described later) as a heat source is disposed between the heat insulating structures 13 and 34 and the heat pipe 11.

  FIG. 2 is a cross-sectional view of the main part of FIG. 1, and the heating device 10 for a heat pipe has a structure in which the first divided cylindrical body 20 and the second divided cylindrical body 30 are matched. A heat conductor 21 such as a graphite sheet wound around the heat pipe 11, a sheathed heater 23 as an electric heater 22 wound around the heat pipe 11 through the heat conductor 21, and the sheathed heater 23. It is the structure which consists of the heat insulation structure 13 made to adjoin to the outer periphery.

On the other hand, in the second divided cylindrical body 30, a heat conductor 31 made of a cushioning material and wound around the heat pipe 11 and a sheath as an electric heater 32 wound around the heat pipe 11 via the heat conductor 31. The heater 33 and a heat insulating structure 34 adjacent to the outer periphery of the sheathed heater 33 are configured.
Then, after the first divided cylindrical body 20 and the second divided cylindrical body 30 are matched, the sheath heaters 23 and 33 are pressed toward the heat pipe 11 to compress the heat conductors 21 and 31 as pressing means 15. A structure including a clamp 16.

The sheathed heater 23 includes a conductive wire 24 made of a nichrome wire in the center, and the periphery of the conductive wire 24 is hardened with insulating powder bodies 25 and 26 such as magnesium oxide, and the outer periphery of the insulating powder bodies 25 and 26 is coated with a metal covering material 27, It is formed by covering with 28.
On the other hand, the sheathed heater 33 includes a conductive wire 35 made of a nichrome wire at the center, the periphery of the conductive wire 35 is hardened with insulating powder bodies 36 and 37 such as magnesium oxide, and the outer periphery of the insulating powder bodies 36 and 37 is a metal covering material. It is formed by covering with 38 and 39.

  The sheathed heaters 23 and 33 are heated by connecting a power source 44 installed on the wiring 43 connecting the one end 41 and the other end 42 of the conductor 24 of the sheathed heater 23, and one end 45 and the other end 46 of the conductor 35 of the sheathed heater 33. This is executed by turning on the power supply 48 arranged in the wiring 47 to be coupled.

As described above, the electric heaters 22 and 32 are wound around the heat pipe 11 via the heat conductors 21 and 31 and the electric heaters 22 and 32 are pressed toward the heat pipe 11 side. It comprised with the clamp 16 as the press means 15 which compresses the heat conductors 21 and 31. FIG. Since the heat conductors 21 and 31 having cushioning properties are employed, the manufacturing conductors can be absorbed by the heat conductors 21 and 31, and no gaps are generated. Heat can be transferred.
Further, the electric heaters 22 and 32 can be easily attached to the heat pipe 11 and the diameter can be easily reduced. Accordingly, the electric heaters 22 and 32 can be efficiently removed and inspected and repaired.

  3 is a cross-sectional view taken along the line 3-3 in FIG. 2, and the heat conductors 21 and 31 disposed in close contact with both sides of the heat pipe 11 and the sheaths disposed in close contact with the outside of the heat conductors 21 and 31. The heaters 23 and 33, the heat insulating structures 13 and 34 arranged in close contact with the outside and the left and right of the sheathed heaters 23 and 33, and the clamps 16 fitted in the grooves 14 and 49 of the heat insulating structures 13 and 34 are arranged. Shows the state.

FIG. 4 is an operation diagram of the heating device for a heat pipe in the present invention.
(A) shows an initial state in which heat is conducted to the working fluid 51 inside the heat pipe 11, and the heat generated from the sheathed heaters 23, 33 is shown as a white arrow A through the heat conductors 21, 31. Then, the working fluid 51 is moved as a steam flow in the right direction as indicated by an arrow B.

  In (b), the working state of the working fluid 51 in the heat pipe 11 is shown. The working fluid 51 absorbs heat as indicated by the white arrow A and moves as a vapor flow as indicated by the arrow B. The heat accumulated outside as indicated by the white arrow C is radiated at the condensing part, and returned as indicated by the arrow D so as to crawl inside the wicks 52 and 53, and again absorb the heat from the sheathed heaters 23 and 33. Become.

  At least the outer peripheral surfaces of the electric heaters 22 and 32 are covered with the heat insulating structures 13 and 34, and the electric heaters 22 and 32 are pressed by the pressing means 15 through the heat insulating structures 13 and 34. It is possible to prevent wasteful heat dissipation to the side and supply a stable amount of heat from the electric heaters 22 and 32 to the heat pipe 11.

  Accordingly, the heat pipe that uniformly heats the outer peripheral portion of the heat pipe 11 using the heat generated from the electric heaters 22 and 32 and can heat and flow the working fluid 51 in the heat pipe 11 with a stable heat transfer amount. There is an advantage that the heating device 10 can be provided.

FIG. 5 is a perspective view showing another embodiment of FIG. 1, in which a heat pipe heating device 55 surrounds the outer periphery of the heat pipe 11 with heat insulating structures 13 and 34 that coincide with each other at the dividing portion 12, and this heat insulating structure. This is a structure in which a bracket 56 as the pressing means 15 is fitted from above the groove 14 (not shown) of 13 and 34 and fixed to the heat pipe 11 by pressing the heat insulating structures 13 and 34 against the heat pipe 11.
Further, between the heat insulating structures 13 and 34 and the heat pipe 11, sheathed heaters 23 and 33 as heat sources are arranged.
The bracket 56 is fixed by joining the mating portions 57 and 58 with a bolt 59 and a nut (not shown).

  FIG. 6 is a cross-sectional view of the main part of FIG. 5, and the heat pipe heating device 55 has a structure in which the first divided cylindrical body 20 and the second divided cylindrical body 30 coincide with each other. The reference numerals of the two-divided cylindrical body 30 are the same as those shown in FIG.

The heat pipe heating device 55 aligns the first divided cylindrical body 20 and the second divided cylindrical body 30, and then presses the sheathed heaters 23 and 33 toward the heat pipe 11 to heat conductors 21 and 31. A bracket 56 is provided as the pressing means 15 for compressing.
61 is a nut.
The details of the structure of the sheathed heaters 23 and 33 and the heating method are the same as in FIG.

FIG. 7 is a perspective view showing still another embodiment of FIG. 1. A heating device 65 for a heat pipe uses an outer periphery of the heat pipe 11 and mating surfaces 66 and 67 using bolts 68 and 69 and a nut (not shown). The structure is such that the first divided cylindrical body 70 and the second divided cylindrical body 80 to be coupled are surrounded, and the first divided cylindrical body 70 and the second divided cylindrical body 80 are fixed to the heat pipe 11 by pressing.
In addition, the electric heater 73 as a heat source and a heat insulating structure (not shown) and the electric heater 83 and a heat insulating structure (not shown) are each integrated, and are housed in the first divided cylindrical body 70 and the second divided cylindrical body 80, respectively.

  FIG. 8 is a cross-sectional view of the main part of FIG. 7. The heat pipe heating device 65 has a structure in which the first divided cylindrical body 70 and the second divided cylindrical body 80 are matched. A heat conductor 71 wound around the heat pipe 11 made of a material having a property, a sheathed heater 74 as an electric heater 73 housed in a molded outer frame 72 wound around the heat pipe 11 via the heat conductor 71, The heat insulating structure 75 is housed in a molded outer frame 72 and is adjacent to the outer periphery of the sheathed heater 74.

  On the other hand, in the second divided cylindrical body 80, a heat conductor 81 made of a cushioning material and wound around the heat pipe 11 and a molding outer frame 82 wound around the heat pipe 11 via the heat conductor 81 are provided. The sheathed heater 84 is a housed electric heater 83 and a heat insulating structure 85 housed in a molded outer frame 82 and adjacent to the outer periphery of the sheathed heater 84.

  After the first divided cylindrical body 70 and the second divided cylindrical body 80 are matched, the mating surface 66 is coupled with the bolt 68 and the nut 91, and the mating surface 67 is coupled with the bolt 69 and the nut 92. This is a structure that compresses the heat conductors 71 and 81 by pressing the first divided cylindrical body 70 and the second divided cylindrical body 80 toward the heat pipe 11.

The sheathed heater 74 includes a conductive wire 76 at the center, and is formed by hardening the periphery of the conductive wire 76 with insulating powder bodies 77 and 77 and covering the outer periphery of the insulating powder bodies 77 and 77 with metal covering materials 78 and 78.
On the other hand, the sheathed heater 84 includes a conductive wire 86 at the center, the periphery of the conductive wire 86 is hardened with insulating powder bodies 87 and 87, and the outer periphery of the insulating powder bodies 87 and 87 is formed by covering with metal coating materials 88 and 88. To do.

  The sheathed heaters 74 and 84 are heated by connecting the power supply 44 installed in the wiring 43 connecting the one end 41 and the other end 42 of the conductor 76 of the sheathed heater 74 and the one end 45 and the other end 46 of the conductor 86 of the sheathed heater 84. This is executed by turning on the power supply 48 arranged in the wiring 47 to be coupled.

  FIG. 9 is a view showing another embodiment of FIG. 8. The first divided cylindrical body 70 includes a sheathed heater 74 composed of a conductive wire 76, insulating powder bodies 77 and 77, and covering materials 78 and 78, and an outer periphery of the sheathed heater 74. The heat insulating structure 75 adjacent to the heat insulating structure 75 is integrally surrounded by the adhesive layer 93, and the integrated structure of the sheathed heater 74, the heat insulating structure 75, and the adhesive layer 93 is pressed against the heat pipe 11 through the heat conductor 71. And an outer frame 95.

  Similarly, the second divided cylindrical body 80 includes a sheath heater 84 composed of a conductive wire 86, insulating powder bodies 87 and 87, and covering materials 88 and 88, and a heat insulating structure 85 adjacent to the outer periphery of the sheath heater 84, as an adhesive layer. 94, and an outer frame 96 that presses the sheathed heater 84, the heat insulating structure 85, and the adhesive layer 94 against the heat pipe 11 through the heat conductor 81.

  Then, the first divided cylindrical body 70 and the second divided cylindrical body 80 are matched with each other, and the mating surface 67 is coupled with a bolt 69 and a nut 92. Although not shown, the mating surface 66 on the opposite side is joined by a bolt 68 and a nut 91.

  In the heat pipe heating device 65, since the heat insulating structure 75 and the sheathed heater 74 and the heat insulating structure 85 and the sheathed heater 84 are each integrally structured, the number of assembling steps when assembling can be reduced.

  The heat pipe heating device 65 covers at least the outer peripheral surfaces of the sheathed heaters 74 and 84 with the heat insulating structures 75 and 85, and the molded outer frames 72 and 82 or the outer frames 95 and 96 through the heat insulating structures 75 and 85. Since the sheathed heaters 74 and 84 are pressed, wasteful heat dissipation from the sheathed heaters 74 and 84 to the outer peripheral side can be prevented, and a stable amount of heat can be supplied from the sheathed heaters 74 and 84 to the heat pipe 11.

  In addition, if the working fluid 51 which acts inside the heat pipe 11 in the heating apparatus 10, 55, 65 for the heat pipe of the present invention is put into practical use as a heat medium such as ammonia solution, water, acetone, methanol, or the like. Any type.

Moreover, the material of the heat pipe 11 is preferably a heat-resistant alloy material, stainless steel, or the like excellent in high corrosion resistance and thermal conductivity.
Furthermore, the covering materials 27, 28, 38, 39, 78, 88 of the sheathed heaters 23, 33, 74, 84 are preferably heat-resistant alloy materials, stainless steel, copper and copper alloy materials, aluminum alloy materials, and the like.

  On the other hand, the clamp 16, the bracket 56, the molded outer frames 72 and 82, and the outer frames 95 and 96 as the pressing means 15 in the heat pipe heating devices 10, 55, and 65 have a cylindrical inner surface and the heat insulating structure 13. , 34, 75, and 85, and the outer surfaces of the clamp 16, the bracket 56, the molded outer frames 72 and 82, and the outer frames 95 and 96 need not be circumferential. .

  The present invention is suitable for a heat pipe heating device used for heat transportation or heat radiation from the device.

It is a perspective view of the heating apparatus for heat pipes concerning this invention. It is principal part sectional drawing of FIG. FIG. 3 is a sectional view taken along line 3-3 in FIG. 2. It is an effect | action figure of the heating apparatus for heat pipes in this invention. It is a perspective view which shows another Example of FIG. It is principal part sectional drawing of FIG. It is a perspective view which shows the further another Example of FIG. It is principal part sectional drawing of FIG. It is a figure which shows another Example of FIG. It is a figure explaining the basic composition of the conventional technology. It is principal part sectional drawing of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Heat pipe heating apparatus, 11 ... Heat pipe, 12 ... Dividing part, 13 ... Heat insulation structure, 14 ... Groove part, 15 ... Pressing means, 16 ... Clamp, 20 ... 1st division | segmentation cylindrical body, 21 ... Heat conductor , 22 ... Electric heater, 23 ... Sheath heater, 30 ... Second divided cylindrical body, 31 ... Thermal conductor, 32 ... Electric heater, 33 ... Sheath heater, 34 ... Thermal insulation structure, 51 ... Working fluid, 56 ... Bracket, 72 ... Molded outer frame, 82 ... Molded outer frame, 93 ... Adhesive layer, 94 ... Adhesive layer, 95 ... Outer frame, 96 ... Outer frame.

Claims (4)

  In the heating device attached to the heat pipe, the heating device is made of a material having a cushioning property, a heat conductor wound around the heat pipe, an electric heater wound around the heat pipe via the heat conductor, and A heating device for a heat pipe, comprising: a pressing unit that compresses the heat conductor by pressing an electric heater toward the heat pipe.   The heating device for a heat pipe according to claim 1, wherein the electric heater is a divided cylindrical body.   The heat pipe according to claim 1 or 2, wherein at least the outer peripheral surface of the electric heater is covered with a heat insulating structure, and the electric heater is pressed by the pressing means through the heat insulating structure. Heating device. The heating apparatus for a heat pipe according to claim 3, wherein the heat insulating structure and the electric heater are integrated.

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