Heat transportation device production method and heat transportation device

Abstract

[Object] To provide a low-cost production method for a heat transportation device with which efficient production with a small number of steps is possible. [Solving Means] A capillary member ( 5 ) having a larger thickness than a frame member ( 2 ) is mounted on an inner surface ( 11 ) of a lower plate member ( 1 ). Subsequently, the frame member ( 2 ) is mounted on the inner surface ( 11 ) of the lower plate member ( 1 ), and an upper plate member ( 3 ) is mounted on the capillary member ( 5 ). Due to a difference between the thickness of the capillary member ( 5 ) and the thickness of the frame member ( 2 ), a squashing amount (G) is provided between the frame member ( 2 ) and the upper plate member ( 3 ). Then, the lower plate member ( 1 ) and the upper plate member ( 3 ) are diffusion-bonded with the frame member (2). At this time, the capillary member ( 5 ) is compressed by an amount corresponding to the squashing amount (G). Since the capillary member ( 5 ) has elasticity, a pressure (P) is partially absorbed, and a pressure (P′) smaller than the pressure (P) is applied to the lower plate member ( 1 ) from the capillary member ( 5 ). By the pressure (P′), the inner surface ( 11 ) of the lower plate member ( 1 ) and the capillary member ( 5 ) are diffusion-bonded.

1 . A production method for a heat transportation device, comprising the steps of:
 laminating a first plate and a second plate constituting a vessel of a heat transportation device that transports heat using a phase change of a working fluid and a capillary member that causes a capillary force to act on the working fluid such that the capillary member is interposed between the first plate and the second plate; and   diffusion-bonding the first plate and the second plate so that the first plate and the capillary member are diffusion-bonded.   
     
     
         2 . The production method for a heat transportation device according to  claim 1 ,
 wherein the capillary member has a larger thickness than an internal space of the vessel constituted of the first plate and the second plate.   
     
     
         3 . The production method for a heat transportation device according to  claim 1  or  2 ,
 wherein the capillary member is formed of a material having elasticity, and 
 wherein the diffusion bonding step includes diffusion-bonding the first plate and the second plate while compressing the capillary member. 
 
     
     
         4 . The production method for a heat transportation device according to  claim 3 ,
 wherein the capillary member includes a first mesh layer and a second mesh layer that is laminated on the first mesh layer and constituted of coarser meshes than the first mesh layer.   
     
     
         5 . The production method for a heat transportation device according to  claim 3 ,
 wherein the second plate includes a protrusion, and   wherein the diffusion bonding step includes diffusion-bonding the first plate and the second plate while compressing the capillary member by the protrusion.   
     
     
         6 . The production method for a heat transportation device according to  claim 1 ,
 wherein the heat transportation device includes a frame member constituting side walls of the vessel, and   wherein the diffusion bonding step includes diffusion-bonding the first plate and the second plate with the frame member so that the first plate and the capillary member are diffusion-bonded.   
     
     
         7 . The production method for a heat transportation device according to  claim 1 ,
 wherein the lamination step includes laminating a unit, that includes the first plate, the capillary member, and the second plate that are laminated with the capillary member being interposed between the first plate and the second plate, and a jig portion including a concave portion such that the unit is fit into the concave portion, and   wherein the diffusion bonding step includes diffusion-bonding the first plate and the second plate of the unit by applying a pressure to the jig portion and the unit in a lamination direction.   
     
     
         8 . The production method for a heat transportation device according to  claim 1 ,
 wherein the lamination step includes laminating a plurality of units each including the first plate, the capillary member, and the second plate and a plurality of jig portions such that each of the plurality of jig portions is inserted between the plurality of units, and   wherein the diffusion bonding step includes diffusion-bonding the first plate and the second plate of each of the plurality of units by applying a pressure to the plurality of units and the plurality of jig portions in a lamination direction.   
     
     
         9 . The production method for a heat transportation device according to  claim 3 ,
 wherein the capillary member includes
 a first member that has a first spring constant and is diffusion-bonded with the first plate, and 
 a second member that has a second spring constant larger than the first spring constant and is laminated on the first member. 
   
     
     
         10 . The production method for a heat transportation device according to  claim 9 ,
 wherein the diffusion bonding step includes diffusion-bonding the first plate and the second plate so that the first plate and the second plate are diffusion-bonded with the capillary member, and wherein the capillary member includes a third member having a third spring constant smaller than the second spring constant, the third member being laminated on the second member and being diffusion- bonded with the second plate.   
     
     
         11 . A production method for a heat transportation device, comprising:
 interposing, by bending a plate for constituting a vessel of a heat transportation device that transports heat using a phase change of a working fluid, a capillary member that causes a capillary force to act on the working fluid between a first portion and a second portion of the bent plate; and   diffusion-bonding an end portion of the first portion and an end portion of the second portion so that the first portion and the capillary member are diffusion-bonded, to thus form the vessel.   
     
     
         12 . A heat transportation device, comprising:
 a vessel including an inner surface;   a working fluid that is accommodated in the vessel and transports heat using a phase change; and   a capillary member including a first member that has a first spring constant and is diffusion-bonded with the inner surface and a second member that has a second spring constant larger than the first spring constant and is laminated on the first member, the capillary member causing a capillary force to act on the working fluid.   
     
     
         13 . A heat transportation device, comprising:
 a vessel including side walls, a frame member constituting the side walls, and a first plate and a second plate bonded to the frame member such that the frame member is interposed between the first plate and the second plate;   a working fluid that transports heat inside the vessel using a phase change; and   a capillary member that causes a capillary force to act on the working fluid.