WO2006054571A1 - シェルアンドチューブ式熱交換器 - Google Patents
シェルアンドチューブ式熱交換器 Download PDFInfo
- Publication number
- WO2006054571A1 WO2006054571A1 PCT/JP2005/021000 JP2005021000W WO2006054571A1 WO 2006054571 A1 WO2006054571 A1 WO 2006054571A1 JP 2005021000 W JP2005021000 W JP 2005021000W WO 2006054571 A1 WO2006054571 A1 WO 2006054571A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- shell
- end plate
- side end
- pipe
- heat exchanger
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/06—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material
- F28F21/062—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material the heat-exchange apparatus employing tubular conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/0219—Arrangements for sealing end plates into casing or header box; Header box sub-elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2275/00—Fastening; Joining
- F28F2275/20—Fastening; Joining with threaded elements
Definitions
- the present invention relates to a shell and tube heat exchanger, and in particular, a part of a shell and tube heat exchanger that uses a resin tube and bundles both ends of the resin tube to form a double cam structure. It relates to the reliable maintenance of the sealing function of
- Shell and tube heat exchangers are widely used for heat exchange of liquids.
- a typical type of shell-and-tube heat exchanger a large number of metal tubes made of copper alloy, etc., are held in parallel to the shell in the thick shell (trunk), and the shell side (the inside of the shell, that is, the outside of the tube) )
- Flows cooling water, the liquid to be cooled (hereinafter referred to as “process liquid”) flows inside the tube, and heat exchange of both liquids is performed via the tube.
- Both ends are supported by partition plates (tube bundle plates, fixing tube plates or side plates) at both ends of the shell. For this reason, through holes for supporting each tube are formed in the partition plate, and the tubes are supported while being sealed by an O-ring or the like installed on the inner periphery of the through hole (Patent Document). 1, Patent Document 2).
- tubes other than metal are also used.
- the tubes have chemical resistance, etc.
- a very good tube made of resin, especially a tube made of fluorine resin is widely used. Then, process liquids that are extremely disliked by contamination or extremely reactive will flow through the resin tube, and cooling water will flow outside.
- Such a resin tube is much more flexible than a metal tube. For this reason, it is difficult to employ a structure such as a metal tube that supports the O-ring while pressing it to seal the partition plate.
- the outer shape is a disc-shaped Hercam structure.
- the part of this her cam structure is arranged between the flange of the shell and the flange of the pipe on the inflow side or the outflow side of the process liquid that flows through the tube. It is fixed to the pipe.
- the hard cam structure is made of resin and is integrated with the tube, when assembling the heat exchanger, one of the hard cam structures must pass through the shell. . For this reason, it is difficult to make the diameter of the shell larger than the inner diameter of the shell. Moreover, it is practically impossible to make a flange with a large number of bolt holes because the diameter increases accordingly.
- Patent Document 1 Japanese Utility Model Publication No. 7-32462
- Patent Document 2 JP-A-9 61071
- the outer periphery of the her cam structure is completely surrounded by a spacer or the like. Both liquid passages are formed in the inner peripheral surface of the liquid, and if the sealing function such as an O-ring that separates the cooling water and the process liquid is damaged, There was a force that could cause contact.
- the electrolytic solution and cooling water may come into contact with each other, resulting in poor insulation.
- the present invention has been made for the purpose of solving the above-described problems, and includes two members (end plates) that cover and fix the honeycomb structure in which the tube ends are bundled, and both ends. Bolt gaps are arranged between the plates and the her cam structure is exposed to the outside. Then, when the sealing function of one of the liquids is impaired due to these, the leaked cooling water or process liquid is easily discharged outside the heat exchanger, and the sealing function of both liquids is impaired. However, it is easy to prevent the two liquids from coming into contact with each other, and the leakage of the liquid can be easily detected visually by the gap force between both end plates.
- a drainer is provided at a position corresponding to between both end plates on the outer peripheral portion of the her cam structure portion, and even when both of the liquids lose their sealing function, both liquids are mixed. This is what does not occur.
- a preferable aspect of the present invention is to form a protruding portion that presses the split ring against the shell on the shell side of the two-cam structure portion in which the ends of all the resin tubes are bundled together.
- the protruding part is used to double seal the coolant and other liquids that flow on the shell side, and the process liquid in the tube is sealed at two locations on the outer peripheral surface and end surface of the piping side of the hard cam structure. This increases the reliability and safety of the seal.
- a shell-and-tube heat exchanger having a side end plate and a pipe side end plate,
- the shell side end plate has a substantially cylindrical shape, and a portion closer to the shell side of the her cam structure portion and the split ring are fitted on the inner peripheral side thereof and fixed to the shell side flange. Press the hard cam structure and the split ring to fix it to the shell side flange,
- the pipe-side end plate is substantially cylindrical, and a portion of the honeycomb structure near the pipe side is fitted on the inner peripheral side thereof, and is fixed to the pipe-side flange and the shell-side end plate.
- a cam structure is sandwiched and fixed with the split ring, and the outer structure of the her cam structure is exposed to the outside at a portion located between the opposing side end surfaces of the shell side end plate and the pipe side end plate. It is a shell-and-tube heat exchanger ⁇ characterized by
- the shell-and-tube heat exchanger of the present invention there is a gap between the opposite end surfaces of the shell-side end plate with the liquid seal inside and the pipe-side end plate with the liquid seal inside. -Either one of the outer peripheral surfaces of the cam structure is exposed to the outside. Even if the liquid seal function is lost, the leaked liquid is easily discharged to the outside of the heat exchanger, and even if the seal function for both liquids is lost, it is easy to prevent contact between both liquids. . In addition, liquid leakage can be found quickly and easily visually.
- the fitting with the end plate is used to fix the her cam structure, the vibration resistance in an earthquake or the like is improved.
- the shape of the shell side end plate is "substantially cylindrical"
- a hole for fixing with a bolt is formed
- a shell side flange and a pipe side end plate with a bolt are formed on the outer peripheral side.
- the cylinder mentioned here includes a shape close to a disk (plate, ring) because it is thin.
- the split ring may be integrated with the her cam structure portion by bonding or the like after the her cam structure portion is fitted into the shell side end plate.
- a metal ring or liner may be fixed by baking or the like on the outer peripheral surface of the her cam structure, the end surface on the seal side or the piping side.
- resin that is a material of the tube is meant to include rubber, nylon and the like in addition to pure resin such as polyethylene.
- resin because it is more flexible than metal, it is difficult to adopt support, fixing means, and methods that are used while sealing the partition plate used in metal tubes. Widely used is a material that is preferably used for supporting and fixing while sealing.
- the invention according to claim 2 is the shell-and-tube heat exchanger according to the above, wherein between the opposite end surfaces of the shell-side end plate and the pipe-side end plate of the her cam structure portion.
- This is a shell-and-tube heat exchanger, characterized in that a drainer is formed on the outer peripheral surface of the portion located at.
- the outer peripheral surface of the her cam structure part is drained, so that when both liquid seals lose their functions, the process liquid and cooling water may come into contact with each other.
- the shell-and-tube heat exchanger according to the invention of claim 2 since the drainage is provided on the outer peripheral surface of the her cam structure, even if the sealing function of both liquids is lost, the leakage occurs. Since the liquid inside drops from the place where there is drainage, contact of both liquids is prevented more reliably, and mixing of cooling water into the process liquid is prevented.
- an electrolytic solution is used as a process solution. Therefore, an electrical short circuit occurs when it comes into contact with cooling water. This short-circuit causes loss of insulation between the battery and the ground, causing a short-circuit accident. However, according to the present invention, such a short circuit can be prevented.
- the outer peripheral surface of the hard cam structure may be protruded, or conversely recessed! May be! /
- the plurality of bolts for fixing the pipe side end plate to the shell side end plate and the outer periphery of the plurality of bolts are surrounded in order to maintain a constant distance between the facing end surfaces of the shell side end plate and the pipe side end plate. It is a shell-and-tube type heat exchanger characterized by having a spacer for each bolt.
- the members (spacer, shield case, etc.) covering the outer periphery of the her cam structure portion are of an integral type surrounding the entire outer periphery of the her cam structure portion. For this reason, it was difficult to cut the IJ with the appropriate tightening force for each bolt.
- any end plate is appropriately pressed in the shell direction or piping direction on the sealing material such as o-rings. It will be.
- the invention according to claim 4 is the shell-and-tube heat exchanger, wherein the her cam structure is fitted on the inner peripheral side of the shell-side end plate together with the split ring. A protrusion that presses the split ring against the end face of the flange on the shell side when fixed;
- the shell-side heat exchanger is characterized in that the shell-side liquid is sealed by a seal structure provided between the protruding portion and the inner peripheral side of the shell-side end plate. .
- the shell-and-tube heat exchanger of the invention of claim 4 since the protruding portion is provided on the outer periphery of the her cam structure portion, first, the shell-side end plate first utilizes this protruding portion.
- the her cam structure can be pressed toward the shell.
- the hard cam structure is fixed by inserting the projecting portion of the shell flange and the end plate on the shell side while pressing the both sides with the split ring interposed therebetween, and by fitting. .
- cooling water is sealed on the inner peripheral side of the substantially cylindrical shell-side end plate and on the outer peripheral surface of the protruding portion of the hammer structure portion.
- the invention according to claim 5 is the shell-and-tube heat exchanger, wherein the seal is provided between the protruding portion of the honeycomb structure portion and the inner peripheral side of the shell-side end plate.
- the structure is a shell provided at two locations between the top surface of the protruding portion and the wall surface on the opposite shell side of the protruding portion and the inner peripheral side of the shell-side end plate. And tube heat exchanger.
- the protruding portion of the her cam structure is formed and sealed at two locations in the shell direction and in different directions perpendicular to the shell direction. Therefore, the reliability and safety of the seal are improved, and the risk of leakage of cooling water and entry into the process liquid side is reduced. Also, depending on the case or depending on the chemical plant, it becomes easy to increase the pressure of the cooling water or the cooling liquid for the purpose of preventing boiling.
- the invention according to claim 6 is the shell and tube heat exchanger
- the two seal structures are shell-and-tube heat exchangers characterized by the use of O-rings.
- one of the O-rings that is simply double-sealed is on the outer peripheral side of the her cam structure and is pressed in the radial direction, and the other one is the protrusion of the her cam structure. It is pressed and sealed in the shell direction at the end wall surface. For this reason, even if the loss of function due to one cause, such as insufficient tightening of the bolt in the tube direction, occurs, the effect on the other sealing function is small.
- the O-ring since the O-ring is in the fitting section, it has high vibration resistance in the event of a seal earthquake.
- the invention according to claim 7 is the shell-and-tube heat exchanger, wherein the pipe-side end plate is fitted with a portion near the pipe of the hard cam structure portion on an inner peripheral side thereof.
- a step portion that presses an end face on the pipe side of the her cam structure portion when fitted, and a liquid seal on the pipe side is provided between the her cam structure portion and the pipe side end plate.
- a shell-and-tube heat exchanger characterized by a seal structure provided between the peripheral sides.
- the member that covers the her cam structure portion is basically not directly or directly connected to the her cam structure portion.
- the pipe-side end plate The pipe is fixed by fitting a portion near the pipe of the her cam structure part on the inner peripheral side thereof, and the pipe side liquid is also sealed by this fixing part. This improves the reliability of both the fixing and sealing functions.
- the invention according to claim 8 is the shell-and-tube heat exchanger, wherein the hermetic structure portion and a seal structure provided between an inner peripheral side of the pipe-side end plate are: Between the end surface portion on the pipe side of the honeycomb structure portion and the step portion on the inner peripheral side of the pipe side end plate, and between the outer peripheral surface near the pipe of the hard cam structure portion and the inner peripheral side of the pipe side end plate.
- This is a shell-and-tube heat exchanger characterized in that it is provided at two locations.
- the process liquid is sealed twice, and further sealed in different directions, ie, the shell direction and the radial direction perpendicular thereto. Reliability also improves this surface.
- the invention according to claim 9 is the shell-and-tube heat exchanger according to claim 8, wherein each of the two seal structures uses an O-ring. It is a shell-and-tube heat exchange ⁇ .
- the shell-and-tube heat exchanger of the invention of claim 9 is a double seal with an O-ring, and therefore has the same effect as the cooling water seal in the invention of claim 6.
- the invention according to claim 10 is the shell-and-tube heat exchanger, wherein the liquid seal on the pipe side is made of polytetrafluoroethylene (hereinafter referred to as PTFE). It is a shell-and-tube heat exchanger characterized by a seal structure used as a material.
- PTFE polytetrafluoroethylene
- PTFE is very excellent in chemical stability, and is hardly corroded by contact with process liquids and does not almost elute impurities into process liquids. Therefore, redox flow batteries, pharmaceuticals It is suitable for systems that do not like process liquid contamination, such as manufacturing and semiconductor manufacturing, systems that handle ultrapure water, and systems that handle corrosive fluids of high strength.
- seal structures that use PTFE as a material include seal structures that use an O-ring that uses PTFE as a material, and gaskets that use PTFE as a material.
- the invention of claim 11 is the shell-and-tube heat exchanger described above, wherein the resin tube is made of fluorine resin. It is a vessel.
- Fluororesin is excellent in heat resistance, insulation, and chemical stability. Therefore, highly pure systems such as redox flow batteries, pharmaceutical manufacturing, semiconductor manufacturing, etc. It is possible to provide excellent shell and tube heat exchange for handling systems and other systems handling corrosive fluids of high strength.
- the hard cam structure is formed by bundling a large number of small-diameter fluororesin tubes.
- a metal frame may be used as a jig for diffusing and holding the tubes inside the shell.
- the invention according to claim 12 is the shell-and-tube heat exchanger described above, wherein the liquid is disposed in a portion located between the facing side end surfaces of the shell-side end plate and the pipe-side end plate.
- This is a shell-and-tube heat exchanger characterized by providing a leak sensor.
- this liquid leakage can be easily detected visually through the gap between the two end plates, but by providing a system function for liquid leakage sensing, that is, a liquid leakage sensor in this part, In addition, liquid leakage can be detected with certainty.
- the part located between the end surfaces where the liquid leakage sensor is provided is a part on the route where the leaked liquid is discharged to the outside, and is provided, for example, at the lower part between the end surfaces.
- the honeycomb structure portion between the two end plates facing each other is exposed to the outside, the leaked cooling water and process liquid can be easily discharged to the outside of the heat exchanger. To be discharged.
- FIG. 1 is a diagram conceptually showing a state in which a knob-cam structure portion in which the ends of a resin tube of the present invention are bundled together is attached to a shell and a pipe.
- FIG. 1 shows a state in which the nose-cam structure portion in which the ends of the resin tube of the present invention are bundled together is fixed while securing a reliable seal with the shell and the piping.
- 11 is a her cam structure part of the present invention
- 12 is a protruding part on the shell side
- 13 is an outer peripheral part of the her cam structure part excluding the protruding part 12.
- 14 is an end face of the pipe side
- 15 is a recess (draining) formed in the center of the outer peripheral portion 13
- 21 is a resin tube
- 23 is a split ring
- 44 is a seal portion that also has a groove force with an O-ring
- 51 is a shell side end plate
- 52 is a pipe side end plate
- 53 is a spacer
- 61 and 62 are bolts
- 91 is a shell side flange
- 96 is a pipe side flange.
- the arrow C indicates the flow of cooling water
- the arrow P indicates the flow of process liquid.
- the shell side end plate 51 is approximately cylindrical, but has two steps on the inner peripheral surface, and the inner diameter of each step is larger toward the shell side.
- the split ring 23 is formed on the inner peripheral surface of the shell side having the largest inner diameter, the top surface of the protruding portion 12 of the hard cam structure portion is formed in the middle portion, and the inner peripheral surface having the smallest inner diameter on the anti-shell side.
- the pipe-side end plate 52 is substantially cylindrical, there is also one step on the inner peripheral surface, and the inner diameter of the portion closer to the shell side is larger. Then, a portion closer to the pipe side of the outer peripheral surface 13 of the her cam structure part 11 is fitted into this large inner diameter part, and the wall surface of the stepped part is connected to the end face 14 of the her cam structure part 11 on the pipe side. Facing each other. In this state, the pipe-side flange 96 that is just fixed by the shell-side end plate 51 and the bolt 61 is also fixed by the bolt 62.
- the her cam structure 11 is in a state where the end surface 14 on the pipe side and the end surface on the shell side of the protruding portion 12 are appropriately pressed.
- the shell side flange 91 and the pipe side flange 96 are fixed.
- a cylindrical spacer 53 is arranged for each bolt on the outer periphery of the bolt 61 that fixes the shell-side end plate 51 and the pipe-side end plate 52.
- This spacer 53 causes excessive pressing force to act on the honeycomb structure 11 made of resin due to excessive screwing of bolts, thermal expansion and vibration of shells and piping, etc. Prevent direct hits.
- the shell-side end plate 51 to the shell-side flange 91 by bolting, the end surface of the end plate 51 facing the shell direction and the protrusion of the honeycomb structure portion 11 are fixed. A pressing force is generated between the protruding portion 12 and the end surface on the non-shell side, whereby the O-ring of the sealing portion 42 at this location is pressed and the sealing function is exhibited.
- the two sealing portions 41 and 42 provide a double seal of the cooling water inside the shell.
- the shell side flange 91 and the shell side end plate 51 are also sealed using an O-ring or a joint sheet. However, since this is not directly related to the gist of the present invention, detailed description is omitted.
- the pipe-side end plate 52 has a seal portion on the portion facing the pipe-side end face 14 of the her cam structure 11 and the portion facing the outer surface of the pipe-side end plate 52 on the outer cam structure 11 respectively. 43 and 44 are formed. That is, an O-ring groove (not shown) is formed, and an O-ring (not shown) is fitted therein. For this reason, with the outer peripheral portion on the piping side of the hard cam structure portion 11 fitted into the corresponding inner peripheral portion of the end plate 52 on the piping side, the sealing portion 44 with a slight inner peripheral surface of the end plate 52 is provided. Thus, a seal is made between the outer peripheral surface of the hard cam structure 11 and the inner peripheral surface of the end plate 52.
- sealing materials such as gaskets may be used for the seal portions 43 and 44 instead of the O-ring.
- PTF E is preferable as a material used for sealing materials such as O-rings and gaskets.
- the her cam structure 11 of the present invention has an outer peripheral surface exposed to the outside between the shell side end plate 51 and the pipe side end plate 52 that is longer in the tube direction than the conventional her cam structure. Yes. Therefore, even if one of the O-ring forces is lost due to damage to one of the hydraulic seals, for example, even if it leaks to the outer surface of the hard cam structure 11, it is visually inspected during inspection. Can easily detect leaks.
- a recess 15 (draining) is formed at the center of the exposed portion. For this reason, even in the event of an accident, etc., even if both the cooling water side and the process liquid side lose the function of the two seal parts, any liquid in the heat exchanger will remain in this recess 15 (draining). Fall down. For this reason, there is no risk that both fluids mix in the heat exchanger.
- a liquid leak sensor 71 is provided at the lower part (lower part in the drawing) of the part where the outer peripheral surface is exposed to the outside between the shell side end plate 51 and the pipe side end plate 52.
- the coolant or Z and process liquid leaking to the outer surface of the hard cam structure 11 are discharged in the lower direction in the figure, but the liquid leak sensor 71 is provided in the discharge route. It can be discovered more easily and reliably.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006545083A JP4680933B2 (ja) | 2004-11-22 | 2005-11-16 | シェルアンドチューブ式熱交換器 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-336963 | 2004-11-22 | ||
JP2004336963 | 2004-11-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006054571A1 true WO2006054571A1 (ja) | 2006-05-26 |
Family
ID=36407112
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/021000 WO2006054571A1 (ja) | 2004-11-22 | 2005-11-16 | シェルアンドチューブ式熱交換器 |
Country Status (3)
Country | Link |
---|---|
JP (1) | JP4680933B2 (ja) |
KR (1) | KR20070084401A (ja) |
WO (1) | WO2006054571A1 (ja) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100839227B1 (ko) * | 2007-05-16 | 2008-06-19 | 현대냉열(주) | 화학약품용 냉각기 |
KR102588365B1 (ko) * | 2015-07-10 | 2023-10-12 | 콘플럭스 테크놀로지 프로프라이어터리 리미티드 | 열교환기 |
KR101967273B1 (ko) | 2017-12-05 | 2019-04-09 | 인제대학교 산학협력단 | 쉘 앤드 튜브 타입 열교환기 |
KR102413066B1 (ko) | 2020-08-20 | 2022-06-29 | 주식회사 동화엔텍 | 듀얼 튜브 타입의 원통 다관식 열교환기 |
KR102526848B1 (ko) | 2021-06-02 | 2023-04-28 | 주식회사 동화엔텍 | 가스 누출의 차단 및 검출이 용이한 전기 히터식 열교환기 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6153689U (ja) * | 1984-09-12 | 1986-04-11 | ||
JPS6323587U (ja) * | 1986-07-24 | 1988-02-16 | ||
JPH0167489U (ja) * | 1987-10-26 | 1989-04-28 | ||
JPH03128277U (ja) * | 1990-03-30 | 1991-12-24 | ||
JPH0449780U (ja) * | 1990-08-31 | 1992-04-27 | ||
JPH10292998A (ja) * | 1997-04-18 | 1998-11-04 | Purantetsukusu:Kk | 多管式熱交換器 |
-
2005
- 2005-11-16 KR KR1020077011451A patent/KR20070084401A/ko not_active Application Discontinuation
- 2005-11-16 JP JP2006545083A patent/JP4680933B2/ja not_active Expired - Fee Related
- 2005-11-16 WO PCT/JP2005/021000 patent/WO2006054571A1/ja active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6153689U (ja) * | 1984-09-12 | 1986-04-11 | ||
JPS6323587U (ja) * | 1986-07-24 | 1988-02-16 | ||
JPH0167489U (ja) * | 1987-10-26 | 1989-04-28 | ||
JPH03128277U (ja) * | 1990-03-30 | 1991-12-24 | ||
JPH0449780U (ja) * | 1990-08-31 | 1992-04-27 | ||
JPH10292998A (ja) * | 1997-04-18 | 1998-11-04 | Purantetsukusu:Kk | 多管式熱交換器 |
Also Published As
Publication number | Publication date |
---|---|
JP4680933B2 (ja) | 2011-05-11 |
JPWO2006054571A1 (ja) | 2008-05-29 |
KR20070084401A (ko) | 2007-08-24 |
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