초록 ▼

Two passages adjacent to each other via walls are formed spirally, and heat is exchanged between fluids passing through the passages via the walls. Upper and lower end faces of the spiral passages are covered with end plates, and the spiral passages and the end plates are sealed air-tightly. The end

Two passages adjacent to each other via walls are formed spirally, and heat is exchanged between fluids passing through the passages via the walls. Upper and lower end faces of the spiral passages are covered with end plates, and the spiral passages and the end plates are sealed air-tightly. The end plates have a first passage inlet opening only to the first passage, a first passage outlet opening only to the first passage, a second passage inlet opening only to the second passage and a second passage outlet opening only to the second passage. Each of the inlets and outlets is open to every turn of the spiral passage. A first fluid entering the passage from the first passage inlet passes through the first passage for less than one turn only and is discharged from the first passage outlet. A second fluid entering the passage through the second passage inlet passes through the second passage for less than one turn only and is discharged from the second passage outlet. Thus, since the fluids entering from the openings pass through the passages for less than one turn only, the pressure loss is small, throughput is high, and the power used for the processing can be reduced.

대표청구항 ▼

What is claimed is: 1. A heat exchanger comprising a first spiral passage; a second spiral passage formed along said first passage, which is adjacent to said first passage via walls; first and second end plates which cover both end faces of said first and second passages, respectively; a first inle

What is claimed is: 1. A heat exchanger comprising a first spiral passage; a second spiral passage formed along said first passage, which is adjacent to said first passage via walls; first and second end plates which cover both end faces of said first and second passages, respectively; a first inlet of first passage, consisting essentially of a group of openings formed in a first region located at about an outer half or about an inner half of an area continuous along radial direction in said first end plate, which openings are open only to said first passage; a first outlet of first passage, consisting essentially of a group of openings formed in a second region located at about an outer half of an area continuous along radial direction in said first or second end plate when said first inlet of first passage is located at said about outer half of said radially continuous area, or located at about an inner half of an area continuous along radial direction in said first or second end plate when said first inlet of first passage is located at said about inner half of said radially continuous area, which openings are open only to said first passage; a second inlet of first passage, consisting essentially of a group of openings formed in a third region located at about an outer half of an area continuous along radial direction in said first or second end plate when said first inlet of first passage is located at said about inner half of said radially continuous area, or located at about an inner half of an area continuous along radial direction in said first or second end plate when said first inlet of first passage is located at said about outer half of said radially continuous area, which openings are open only to said first passage; a second outlet of first passage, consisting essentially of a group of openings formed in a fourth region located at about an outer half of an area continuous along radial direction in said first or second end plate when said second inlet of first passage is located at said about outer half of said radially continuous area, or located at about an inner half of an area continuous along radial direction in said first or second end plate when said second inlet of first passage is located at said about inner half of said radially continuous area, which openings are open only to said first passage; a second passage inlet consisting essentially of a group of openings formed in a fifth region continuous along radial direction in said first or second end plate, which fifth region is formed in an area other than said first to fourth regions, which openings are open only to said second passage; a second passage outlet consisting essentially of a group of openings formed in a sixth region continuous along radial direction in said first or second end plate, which sixth region is formed in an area other than said first to fourth regions, and is formed in the first or second end plate other than the one in which said second passage inlet is formed, which openings are open only to said second passage; and a third passage which air-tightly connect said first outlet of first passage and said second inlet of first passage; said first passage being tightly closed except for said first and second inlets of first passage and said first and second outlets of first passage; said second passage being tightly closed except for said second passage inlet and said second passage outlet; a first fluid entering said first passage from said first inlet of first passage entering said third passage from said first outlet of first passage after passing through said first passage less than one turn only, then entering said first passage from said second inlet of first passage, and being discharged from said second outlet of first passage after passing through said first passage less than one turn only; a second fluid entering said second passage from said second inlet being discharged from said second passage outlet after passing through said second passage in axial direction; heat being exchanged between said first and second fluids through said wall during said first and second fluids pass through said first and second passages, respectively. 2. A method for producing the heat exchanger according to claim 1, comprising the steps of holding said first and second end plates in parallel, in which said openings are formed, each of which has a spiral ridge; stacking two films composed of a material having flexibility and elasticity; and winding said films such that said each film contacts said ridges while bending said films such that central portion in the direction perpendicular to longitudinal direction of said films protrudes to the outer direction of said spiral. 3. The method according to claim 2, wherein said films are spirally wound while closing said openings with a guide plate having ridges compensating for the lack of ridges due to the openings. 4. The method according to claim 2, wherein said two films are air-tightly stacked and wound together at the start point of the spiral, and after winding said films spirally, said two films are air-tightly stacked and wound together at the end point of the spiral.