WO2012050085A1 - 冷凍サイクルの熱交換器及びその製造方法 - Google Patents
冷凍サイクルの熱交換器及びその製造方法 Download PDFInfo
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- WO2012050085A1 WO2012050085A1 PCT/JP2011/073331 JP2011073331W WO2012050085A1 WO 2012050085 A1 WO2012050085 A1 WO 2012050085A1 JP 2011073331 W JP2011073331 W JP 2011073331W WO 2012050085 A1 WO2012050085 A1 WO 2012050085A1
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- WIPO (PCT)
- Prior art keywords
- suction pipe
- capillary tube
- workpiece
- heat exchanger
- refrigeration cycle
- Prior art date
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Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B40/00—Subcoolers, desuperheaters or superheaters
- F25B40/06—Superheaters
-
- 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
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/04—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with tubes having a capillary structure
-
- 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
- F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/26—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass heat exchangers or the like
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D19/00—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
-
- 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
-
- 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
- F28D7/0008—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 for one medium being in heat conductive contact with the conduits for the other medium
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/05—Compression system with heat exchange between particular parts of the system
- F25B2400/052—Compression system with heat exchange between particular parts of the system between the capillary tube and another part of the refrigeration cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/05—Compression system with heat exchange between particular parts of the system
- F25B2400/054—Compression system with heat exchange between particular parts of the system between the suction tube of the compressor and another part of the cycle
-
- 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
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
- F28D2021/0068—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for refrigerant cycles
-
- 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
- F28F2275/06—Fastening; Joining by welding
- F28F2275/064—Fastening; Joining by welding by induction welding or by using microwaves
-
- 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
- F28F2275/06—Fastening; Joining by welding
- F28F2275/067—Fastening; Joining by welding by laser welding
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/4935—Heat exchanger or boiler making
- Y10T29/49359—Cooling apparatus making, e.g., air conditioner, refrigerator
Definitions
- the present invention relates to a heat exchanger of a refrigeration cycle such as a refrigerator and a manufacturing method thereof.
- a refrigerator constitutes a refrigeration cycle in which refrigerant discharged from a compressor sequentially passes through a condenser, a capillary tube, an evaporator, and a suction pipe and returns to the compressor.
- the refrigerant compressed by the compressor is sent to the condenser as high-temperature and high-pressure gas, where it dissipates heat and is liquefied.
- the liquefied refrigerant is sent to the evaporator through the capillary tube.
- the liquefied refrigerant sent from the capillary tube to the evaporator is vaporized by the evaporator, thereby taking away ambient heat and generating cold air.
- the vaporized refrigerant returns to the compressor through the suction pipe and is compressed again.
- the refrigerant passing through the capillary tube is relatively hot.
- it is effective to lower the temperature of the refrigerant flowing into the evaporator from the capillary tube.
- a method of bringing a suction pipe through which a relatively low-temperature refrigerant flows into contact with a capillary tube is known. That is, the temperature of the refrigerant flowing through the capillary tube is lowered by exchanging heat between the refrigerant in the suction pipe and the refrigerant in the capillary tube.
- a method for joining a capillary tube and a suction pipe as a heat exchanger of such a refrigeration cycle a method of soldering in a state where the capillary tube and the suction pipe are attached in parallel is often employed.
- Current capillary tubes are generally small-diameter tubes having an inner diameter of about ⁇ 0.6 mm to ⁇ 0.8 mm and an outer diameter of about ⁇ 2.0 mm to ⁇ 3.0 mm.
- the suction pipe is generally composed of a round tube having an inner diameter of about ⁇ 4.5 mm to ⁇ 6.5 mm and an outer diameter of about ⁇ 6.0 mm to ⁇ 8.0 mm.
- the lengths of the capillary tube and the suction pipe are approximately 2,000 to 3,000 mm, although they vary depending on the size of the refrigerator-freezer.
- Refrigeration cycle heat exchangers installed in refrigeration refrigerators marketed in Japan and around the world are soldered so that the outer surfaces of the copper suction pipe and the copper capillary tube are in thermal contact with each other. They are joined together by attaching. Copper suction pipes and copper capillary tubes have been put to practical use up to now for reasons such as good heat exchange, excellent corrosion resistance, and easy and integral joining by soldering.
- Patent Documents 1, 2, and 5 have proposed improvements as a heat exchanger, but basically, a copper suction pipe and a copper capillary tube are heated by soldering. Contacted heat exchangers are disclosed.
- Patent Document 7 discloses a heat exchanger in which a copper suction pipe and a copper capillary tube are brought into thermal contact with each other by seam welding.
- Patent Document 3 does not specifically mention the material of the suction pipe and the capillary tube, but “the capillary tube is soldered in a form that forms a counter-flow heat exchanger with the suction pipe”. From the description, the material of the suction pipe and the capillary tube seems to be copper. In Patent Document 5, the material of the capillary tube is not mentioned, but “the suction pipe and the capillary tube are configured to be in heat contact with each other at a predetermined distance by soldering. From the description of “the portion in thermal contact is a metal such as copper,” it is considered that the material of the capillary tube is also copper.
- Patent Document 1 relates to a refrigerator for exchanging heat between a suction pipe and a capillary tube. It is described that the capillary tube and the suction pipe are both formed of a copper tube and are brought into thermal contact with each other by soldering in a state where the capillary tube and the suction pipe are attached in parallel.
- Patent Document 2 relates to an improvement of a multiple heat exchanger used in a refrigerator or the like.
- a fluid passage tube inner tube
- a fluid passage tube outer tube
- the fluid flow pipe (outer pipe) corresponding to the suction pipe
- the fluid flow pipe (inner pipe) corresponding to the capillary tube
- Patent Document 3 relates to a refrigerator for exchanging heat between a suction pipe and a capillary tube. Soldered in the form of a counterflow heat exchanger with the capillary tube and suction pipe attached in parallel.
- Patent Document 4 relates to a heat exchanger that can be used in a refrigeration circuit such as a refrigerator.
- a heat exchanger using a copper alloy capillary tube and an aluminum alloy suction pipe is disclosed. Since the capillary tube and the suction pipe are made of different metals, if water adheres to the heat exchanger, a local battery is formed between the different metals, and the heat exchanger may corrode. Therefore, a copper alloy capillary tube and an aluminum alloy suction pipe are held in parallel, and a molten aluminum-silicon brazing material is poured and solidified. Thereby, the capillary tube made of copper alloy and the suction pipe made of aluminum alloy are thermally joined, and the outer periphery of the capillary tube and the suction pipe is continuously covered with the brazing material.
- Patent Document 5 relates to a refrigeration system device for the purpose of preventing condensation due to a refrigeration cycle. Since the suction pipe itself is made of a metal material such as copper having excellent thermal conductivity, the problem of condensation is likely to occur. The problem is to solve this problem by making a part of the suction pipe a resin having a lower thermal conductivity than a metal such as copper.
- the suction pipe and the capillary tube are configured to be in heat contact with each other at a predetermined distance by soldering. It is described that the portion of the suction pipe that is in thermal contact with the capillary tube is made of a metal such as copper, and the other portion is made of a resin having a high gas barrier property.
- Patent Document 6 relates to a suction pipe assembly that improves thermal conductivity.
- the suction pipe assembly has a capillary tube inside and a heat transfer pipe contact portion with a contact portion for expanding the contact area with the suction pipe on the outside via a heat conductive adhesive on the outer peripheral surface of the suction pipe. It has a connected structure. Since the contact area between the heat transfer pipe and the suction pipe increases, heat exchange between the refrigerant moving through the suction pipe and the refrigerant moving through the capillary tube inserted inside the heat transfer pipe is effectively performed. That's it.
- the capillary tube is made of copper, it may be made of aluminum or steel, and the heat transfer pipe may be made of aluminum, but it is described that various materials can be used.
- the suction pipe may be a copper material or aluminum, but it is described that steel is preferable because of good workability and bendability and relatively low cost.
- steel is preferable because of good workability and bendability and relatively low cost.
- a corrosion-resistant plating can be used to obtain a commercially available suction pipe with no fear of corrosion.
- a steel suction pipe, a copper capillary tube, and an aluminum heat transfer pipe are used.
- Patent Document 7 discloses a method of joining a suction pipe and a capillary tube by welding to bring them into thermal contact. Specifically, a pair of ridges extending in the tube axis direction are capillaryally formed in the circumferential direction by plastically deforming a portion of the suction pipe so as to protrude in the radial direction on the outer peripheral surface of the copper tube forming the suction pipe. It is formed with an interval substantially equal to the outer diameter of the tube. Thereafter, a copper tube forming a capillary tube is arranged between the ridges, and each ridge is joined to the capillary tube by seam welding.
- JP 2002-130912 A JP 2006-292182 A JP 2008-121980 A JP 2008-267757 A JP 2009-41810 A Special table 2010-525297 JP 2001-248979 A
- the cost reduction of the heat exchanger of the refrigeration cycle can be realized, the cost of the refrigerator-freezer as a product can be reduced.
- the function and quality as a heat exchanger are required to be within the allowable range and comparable to the current one.
- the improved heat exchanger has substantially the same structure as the current heat exchanger, that is, the shape of the suction pipe and capillary tube constituting the heat exchanger (the inner diameter, outer diameter, and length of the pipe and tube). Is required to be equivalent within an allowable range.
- the present inventors can replace the copper suction pipe and the copper capillary tube of the heat exchanger of the current refrigeration cycle with an aluminum material as the material of the suction pipe and the capillary tube.
- soldering or brazing base materials having extremely different diameters such as a suction pipe and a capillary tube
- the difference in melting point between the aluminum material which is the base material and the solder is large, so that the outer surface of the suction pipe and the outer surface of the capillary tube can be joined without affecting the base material.
- the heat exchanger of the refrigeration cycle in which an aluminum material suction pipe and an aluminum material capillary tube are joined by aluminum solder has a problem in terms of corrosion resistance. Deterioration of the joint is inevitable, and anticorrosion treatment is necessary to prevent this.
- An aluminum material joined with a brazing material selected from Al—Si alloy or Zn—Al alloy has no problem in corrosion resistance, and therefore does not require anticorrosion treatment for protecting the joint.
- a capillary tube made of a thin aluminum material having a length of 2,000 to 3,000 mm and a suction pipe made of an aluminum material having an extremely large diameter in parallel with each other are heated in parallel. It is considered difficult to raise the temperature to the same temperature because of the difference in heat capacity between the two, and when trying to raise the brazing temperature to an appropriate temperature, the capillary tube with a small diameter may overheat and may be damaged.
- Patent Document 7 a copper suction pipe and a copper capillary tube are joined by seam welding. Welding such as seam welding or arc welding is possible for joining a copper suction pipe and a copper capillary tube.
- Welding such as seam welding or arc welding is possible for joining a copper suction pipe and a copper capillary tube.
- an aluminum suction pipe and an aluminum capillary tube are used instead of the copper suction pipe and the copper capillary tube, it is considered impossible to join by seam welding or arc welding.
- the reasons are as follows.
- the specific heat of copper (0 ° C) is 0.880 J / g ⁇ K
- the specific heat of aluminum (0 ° C) is 0.379 J / g ⁇ K
- the specific gravity of copper (20 ° C) is 8.96
- the specific gravity of aluminum The copper suction pipe is 7.7 times the heat capacity of the aluminum suction pipe
- the copper capillary tube is 7.7 times the heat capacity of the aluminum capillary tube. is there. Therefore, even if the same amount of heat is given, the temperature change is smaller in copper than in aluminum.
- the melting point of copper is about 1083 ° C and the melting point of aluminum is about 660 ° C
- welding such as seam welding and arc welding is possible for joining a copper suction pipe and a copper capillary tube.
- the suction pipe made of aluminum material and the capillary tube made of aluminum material are used, the capillary tube having a small diameter may be overheated and may be dissolved and damaged.
- the object of the present invention is to replace the copper suction pipe and the copper capillary tube of the heat exchanger of the current refrigeration cycle with aluminum material as the material of the suction pipe and the capillary tube, and to heat the current refrigeration cycle.
- the function and quality of the exchanger are as good as the tolerances, and the heat of the refrigeration cycle has the same structure as the heat exchanger of the current refrigeration cycle, and has excellent productivity and cost reduction.
- An exchanger and a method for manufacturing the same are provided.
- an aluminum material suction pipe and an aluminum material capillary in which a brazing material selected from an Al—Si alloy or a Zn—Al alloy is supplied to a joining portion and flux is applied. If the entire tube can be heated to an appropriate brazing temperature in a state where the tube is attached in parallel with the jig, the above-mentioned fear that the capillary tube with a small diameter will be overheated and melted may be solved. This has led to the present invention.
- the heat exchanger of the refrigeration cycle is configured to sequentially circulate the refrigerant discharged from the compressor to the condenser, the capillary tube, the evaporator, the suction pipe, and the compressor, and the outer surface of the capillary tube And the outer surface of the suction pipe are in thermal contact with each other in the refrigeration cycle, in which the capillary tube and the suction pipe are both made of aluminum, and the capillary tube
- the joining portion between the outer surface and the outer surface of the suction pipe is joined in a state where a fillet of a brazing material selected from Al—Si alloy or Zn—Al alloy is formed.
- a first manufacturing method of a heat exchanger for a refrigeration cycle according to the present invention includes a refrigerant, a capillary tube, an evaporator, a suction pipe, and a refrigerant discharged from a compressor.
- the outer surface of the capillary tube and the outer surface of the suction pipe are in thermal contact with each other.
- the workpiece is an aluminum material suction pipe and an aluminum material capillary tube arranged in parallel with the jig.
- the workpiece is made of an Al—Si alloy or Zn—.
- a brazing material selected from an Al alloy is supplied and flux is applied; 2) a step of bringing the workpiece prepared in the jig into a brazing furnace preheated together with the jig; 3) A step in which the workpiece is heated, the brazing material is melted, and a fillet is formed at a location where the suction pipe and the capillary tube are joined; 4) cooling the workpiece and solidifying the fillet; A heat exchanger for a refrigeration cycle is manufactured by the in-furnace brazing method having the above steps 1) to 4).
- the present inventors when brazing an aluminum-made suction pipe and an aluminum-made capillary tube by high-frequency induction heating, the present inventors each of a suction pipe and a capillary tube that are attached in parallel during high-frequency induction heating. If the outer surface of the tube is in close contact, the temperature of the suction pipe and the capillary tube will be almost uniform, and even when the brazing temperature is raised to an appropriate temperature, the capillary tube with a small diameter will be overheated and will be damaged. I found that there was no. *
- a second production method for a heat exchanger of a refrigeration cycle according to the present invention includes a refrigerant, a capillary tube, an evaporator, a suction pipe, and a refrigerant discharged from a compressor.
- the Al—Si alloy or A workpiece in which an aluminum suction pipe supplied with a brazing material selected from a Zn—Al alloy and applied with a flux and a capillary tube made of aluminum are added in parallel are respectively connected to the suction pipe and the capillary tube.
- the fillet is solidified.
- the second production method is configured so that the refrigerant discharged from the compressor is circulated sequentially to a condenser, a capillary tube, an evaporator, a suction pipe, and the compressor, and the outside of the capillary tube.
- the workpiece is an aluminum material suction pipe and an aluminum material capillary tube arranged in parallel with the jig.
- the workpiece is made of an Al—Si alloy or Zn—. 2) A brazing material selected from an Al alloy is supplied and flux is applied.
- a workpiece holding device in which at least a member in contact with the workpiece is arranged inside a high-frequency induction heating coil. Transporting to (A) The workpiece holding device includes a suction pipe pressing member that presses a side surface of the suction pipe that is one of the workpieces toward the capillary tube that is the other side of the workpiece, and a side surface of the capillary tube that is the suction pipe. A capillary tube pressing member that presses the workpiece toward the surface 3) The workpiece is held in a state in which the outer surfaces of the aluminum material suction pipe and the aluminum material capillary tube are pressed against each other by the workpiece holding device.
- the fi The step of forming the Tsu door; 4) cooling the workpiece and solidifying the fillet; A heat exchanger for a refrigeration cycle is manufactured by a high-frequency induction heating method having the above steps 1) to 4).
- the inventors of the present invention have made the outer surfaces of the aluminum suction pipe and the aluminum capillary tube press-contact with each other so as to minimize the thermal effect on the entire suction pipe and capillary tube. It has been found that a heat exchanger for a refrigeration cycle with good heat exchange can be manufactured by heating the joining portion with a small spot heat source in a short time so as not to give it.
- the present inventors use a laser beam as a heat source when melting and joining the outer surface of an aluminum material suction pipe and an aluminum material capillary tube, and the outer surface of each of the suction pipe and the capillary tube. It has been found that if laser welding is performed in the pressure contact state, the capillary tube with a small diameter is overheated without causing thermal influence on the suction pipe and the capillary tube as much as possible, and there is no deformation or dissolution damage.
- the heat exchanger of the refrigeration cycle is configured to sequentially circulate the refrigerant discharged from the compressor to the condenser, the capillary tube, the evaporator, the suction pipe, and the compressor, and the outer surface of the capillary tube And the outer surface of the suction pipe are in thermal contact with each other in the refrigeration cycle, in which the capillary tube and the suction pipe are both made of aluminum, and the capillary tube
- the joint location between the outer surface and the outer surface of the suction pipe is characterized in that each outer surface is joined in a molten state.
- a third manufacturing method of a heat exchanger for a refrigeration cycle according to the present invention includes a refrigerant, a capillary tube, an evaporator, a suction pipe, and a refrigerant discharged from a compressor.
- the outer surface of the capillary tube and the outer surface of the suction pipe are in thermal contact with each other.
- a state in which an aluminum material suction pipe and an aluminum material capillary tube are attached in parallel means that an aluminum material made of aluminum material is used as shown in FIGS. 4, 7, 13, and 16. This means that the suction pipe 105 and the aluminum capillary tube 103 are arranged so that the outer surfaces thereof are in contact with each other.
- a brazing sheet is used as the brazing material, each of the aluminum suction pipe 105 and the aluminum capillary tube 103 is used. You may arrange so that an outer surface of may contact
- the function and quality as a heat exchanger of the current refrigeration cycle are inferior within an acceptable range, and substantially the same structure as the heat exchanger of the current refrigeration cycle, that is, a heat exchanger is provided.
- the shape of the suction pipe and the capillary tube are within the allowable range, and the unit price is almost 1/3 and the specific gravity is almost the same as copper.
- the heat exchanger of the refrigerating cycle which enabled the cost reduction using the aluminum material which is 1/3 was able to be provided.
- the outer surface of the suction pipe and capillary tube can be joined by laser welding, which facilitates mass production and eliminates the use of brazing material, which greatly reduces costs. It was possible to provide a heat exchanger with a refrigeration cycle that is possible.
- FIG. 1 Configuration diagram of a refrigeration cycle using a heat exchanger according to the present invention
- Cross section of FIG. The perspective view which shows the state by which the workpiece
- Sectional view of FIG. Schematic illustration of brazing furnace used in the first manufacturing method
- work with the workpiece holding apparatus used for the 2nd manufacturing method Schematic diagram for explaining a state in which the suction pipe pressing member and the capillary tube pressing member included in the work holding device press the side surface of the suction pipe and the side surface of the capillary tube obliquely from above.
- FIG. 11 is a photograph of the heat exchanger according to the present invention.
- the capillary tube 103 made of an aluminum material may be simply referred to as a capillary tube 103
- the suction pipe 105 made of an aluminum material may be simply referred to as a suction pipe 105.
- the heat exchanger obtained by the first production method and the second production method is referred to as a heat exchanger 106A
- the heat exchanger obtained by the third production method is referred to as a heat exchanger 106B.
- the heat exchangers 106A and 106B are collectively referred to as the heat exchanger 106.
- FIG. 1 is a configuration diagram of a refrigeration cycle using a heat exchanger according to the present invention.
- FIG. 2 is a perspective view showing a heat exchanger according to the present invention in which a fillet is formed and joined at a joining portion
- FIG. 3 is a cross-sectional view of FIG.
- FIG. 4 is a perspective view showing a state in which a workpiece according to the present invention is prepared in a jig used in the first manufacturing method
- FIG. 5 is a cross-sectional view of FIG.
- FIG. 6 is a schematic explanatory view of a brazing furnace used in the first manufacturing method.
- the refrigeration cycle shown in FIG. 1 includes a compressor 101 that sucks and discharges refrigerant, a condenser 102 having one end connected to the refrigerant discharge side of the compressor 101, and aluminum having one end connected to the other end of the condenser 102.
- a suction pipe 105 made of an aluminum material is provided.
- the heat exchanger 106 of the refrigeration cycle according to the present invention is formed by thermally contacting the outer surfaces of the suction pipe 105 made of aluminum and the capillary tube 103 made of aluminum.
- the refrigeration cycle according to the present invention includes an accumulator and a condenser 102 having a function of separating a gaseous refrigerant and a liquid refrigerant evaporated between the evaporator 104 and the suction pipe 105 and directing the gaseous refrigerant to the compressor 101.
- a dryer or the like for removing moisture can be provided between the capillary tubes 103.
- the joint between the outer surface of the aluminum capillary tube 103 and the outer surface of the aluminum suction pipe 105 is a fillet of brazing material selected from Al—Si alloy or Zn—Al alloy. It joins in the state formed.
- the refrigerant compressed by the compressor 101 is sent to the condenser 102 as a high-temperature and high-pressure gas, and is liquefied by releasing heat from the condenser 102.
- the liquefied refrigerant is decompressed through the capillary tube 103 and sent to the evaporator 104.
- the refrigerant liquefied in the evaporator 104 evaporates, the surrounding heat is taken away, and as a result, the surrounding air is cooled.
- the evaporated low-temperature refrigerant returns to the compressor 101 through the suction pipe 105 and is compressed again.
- hydrocarbon refrigerants such as cyclopentane and isobutane having a low global warming potential are preferable.
- FIG. 2 is a perspective view showing a heat exchanger according to the present invention in which a fillet is formed at a joining portion and joined
- FIG. 3 is a sectional view thereof.
- Both the capillary tube 103 and the suction pipe 105 constituting the heat exchanger 106A are made of an aluminum material.
- the joining portion between the outer surface of the capillary tube 103 and the outer surface of the suction pipe 105 is joined in a state in which a braze fillet 201 selected from Al—Si alloy or Zn—Al alloy is formed,
- the capillary tube 103 and the suction pipe 105 are in thermal contact with each other.
- the shape, length, outer diameter, inner diameter, etc. of the capillary tube 103 and the suction pipe 105 constituting the heat exchanger 106A are used in current refrigerator-freezers and refrigerators, except that the material is aluminum. Capillary tube and suction pipe are almost equivalent. Further, the aluminum material that is a material of the suction pipe 105 and the capillary tube 103 may be aluminum or an aluminum alloy.
- an Al—Si alloy or a Zn—Al alloy was selected as the brazing material from the viewpoints of melting point, thermal conductivity, corrosion resistance of joints, strength, workability, and the like.
- the main application of the heat exchanger 106 according to the present invention is a refrigerator-freezer, and the replacement cycle for the replacement cycle is roughly 10 to 12 years, although the recommended period varies slightly depending on the manufacturer.
- the corrosion resistance of the joint is an important factor, and from this point of view, it will be used for the heat exchanger 106A.
- the material is preferably an Al—Si alloy. *
- Flux is used to remove the oxide film on the surface of the aluminum material and improve the wettability and fluidity of the molten brazing material.
- the flux to be used CeF flux, chloride flux, and non-corrosive fluoride flux can be used. It is preferable to use a non-corrosive fluoride-based flux because there is an advantage that cleaning after brazing of the heat exchanger 106A is unnecessary.
- FIG. 4 is a perspective view showing a state in which a workpiece according to the present invention is prepared in a jig used in the first manufacturing method
- FIG. 5 is a sectional view thereof.
- the suction pipe 105 made of aluminum material and the capillary tube 103 made of aluminum material are arranged in a jig 400 in parallel with their respective outer surfaces being in contact with each other.
- Reference numeral 502 denotes a brazing material, and a thin wire brazing material is used.
- the brazing material may be a sheet-like brazing material such as a brazing sheet.
- the suction pipe 105 and the capillary tube 103 are arranged in parallel with each other via the brazing sheet, and are arranged on the jig 400.
- the brazing material is supplied as the third material, but the brazing material may be supplied in a form of being clad on an aluminum material suction pipe or an aluminum material capillary tube.
- a flux is applied to the workpiece 501 according to the present invention.
- any method such as a method of applying with a brush, spray coating, or a dipping method in which the work 501 is immersed in a flux solution can be employed.
- a paste in which a flux and a brazing material are integrated for example, a paste brazing material in which a powdery brazing material is mixed with a flux, or a brazing material containing a flux containing a flux in the brazing material. it can.
- the jig 400 includes an L-shaped jig 401 and a presser lid 402.
- the L-shaped jig 401 and the pressing lid 402 can be made of stainless steel (for example, SUS304).
- the L-shaped jig 401 is produced by joining the bottom plate 401a and the side plate 401b by laser welding.
- the jig 400 has a length of 500 to 1,000 mm, and a plurality of jigs 400 are used according to the length of the work 501, thereby preventing deformation of the capillary tube 103 made of aluminum material due to thermal expansion.
- a suction pipe 105 and a capillary tube 103 are attached in parallel to an L-shaped jig 401, a thin Al-Si alloy 502 is supplied, and a non-corrosive fluoride flux (nocolock flux) is applied with a brush.
- the work 501 is fixed by the pressing lid 402.
- a 3,000 mm aluminum suction pipe and an aluminum capillary tube are used, three 1,000 mm jigs 400 are arranged in series.
- FIG. 6 is a schematic explanatory diagram of a brazing furnace used in the first manufacturing method.
- the workpiece 501 fixed to the jig 400 is carried into the brazing furnace 600.
- a brazing furnace 600 is a continuous furnace including a preheating chamber 601, a brazing chamber 602, and a cooling chamber 603.
- the jig 400 on which the work 501 is fixed is set on a conveyance belt (not shown), and the work 501 is carried into the preheating chamber 601.
- the preheating chamber 601 is always kept at 320 ° C. and adjusted to be heated to 480 ° C. when the work 501 is loaded.
- the conveyance speed varies depending on the number of workpieces 501 to be brazed at a time, but when the number of workpieces is one set, the conveyance speed is 1 m / min.
- the work 501 preheated in the preheating chamber 601 is conveyed to the brazing chamber 602 heated to 620 to 630 ° C.
- Brazing is performed by heating the workpiece 501 to a brazing temperature (melting point of the brazing material) by a heater in the brazing chamber 602. Since an Al—Si alloy is used as the brazing material, the brazing temperature is 602 ° C. ⁇ 5 ° C. Since nitrogen gas flows into the brazing chamber 602 from the liquid nitrogen tank 605 through the supply pipe 604 provided with the on-off valve 604a, the brazing chamber 602 is maintained in an atmosphere of nitrogen gas. .
- the oxygen concentration in the nitrogen gas atmosphere is 100 ppm or less, the dew point in the nitrogen gas atmosphere is ⁇ 40 ° C. or less, and the pressure in the nitrogen gas atmosphere is atmospheric pressure.
- the brazing chamber 602 By maintaining the brazing chamber 602 in a nitrogen gas atmosphere, the formation of an oxide film on the surfaces of the aluminum suction pipe 105 and the aluminum capillary tube 103 is suppressed.
- the brazing method using an Al—Si alloy and a non-corrosive fluoride-based flux the Al—Si alloy as the brazing material is melted at the place where the suction pipe 105 and the capillary tube 103 are joined, and the fillet 201 is formed.
- the workpiece 501 can be bonded satisfactorily.
- the brazing chamber 602 and the preheating chamber 601 and the brazing chamber 602 and the cooling chamber 603 are always in communication with each other without a door, so that each of these chambers has a nitrogen gas atmosphere. can do.
- the workpiece 501 is transferred to a cooling chamber 603 having a water cooling jacket (not shown) and gradually cooled therein, so that the fillet 201 formed in the brazing chamber 602 is solidified. .
- the work 501 cooled in the cooling chamber 603 is transferred to the outside of the brazing furnace 600, and the manufacture of the heat exchanger 106A is completed. It was confirmed that the aluminum suction pipe 105 and the aluminum capillary tube 103 had no pinholes and were continuously brazed. Further, since the workpiece 501 is gradually cooled, an annealing effect can be obtained and bending can be easily performed.
- the heat exchanger 106A heats in a state where the outer surfaces of the aluminum suction pipe and the aluminum capillary tube are forcibly brought into close contact with each other, that is, in a pressure-contact state, so that high frequency induction is performed. It was found that it can also be produced by a heating method. This will be described below with reference to the drawings.
- FIG. 7 is a perspective view showing a state in which the heat exchanger according to the present invention is manufactured by the high-frequency induction heating method as the second manufacturing method
- FIG. 8 is a front view of FIG.
- FIG. 9 is a schematic diagram for explaining a state in which the workpiece is pressed by the workpiece holding device used in the second manufacturing method
- FIG. 10 is a schematic diagram for explaining a state in which the suction pipe pressing member and the capillary tube pressing member included in the work holding device press the side surface of the suction pipe and the side surface of the capillary tube obliquely from above.
- FIG. 7 shows a work 501 prepared in a jig in a direction indicated by an arrow ( ⁇ ) on a work holding device in which a member in contact with the work 501 is arranged inside the high frequency induction heating coil 700 (from right to left in the drawing). ) And the heat exchanger 106A is being manufactured. Similar to the first manufacturing method, the work 501 is supplied with an Al—Si alloy and is subjected to a non-corrosive fluoride-based flux. In addition, the code
- reference numeral 103 denotes an aluminum capillary tube
- reference numeral 105 denotes an aluminum suction pipe
- reference numeral 501 denotes a workpiece
- reference numeral 201 denotes a fillet
- reference numeral 502 denotes a brazing material.
- the work holding device includes a suction pipe pressing member 810 (in the drawing, the suction pipe pressing member 810 includes a suction pipe contact portion 811, a spring portion 812, and a support column 813), and a capillary tube pressing member 820 (in the drawing).
- the capillary tube pressing member 820 includes a capillary tube contact portion 821, a spring portion 822, and a support column 823.
- the suction pipe pressing member 810 presses the side surface of the suction pipe 105 that is one of the workpieces 501 toward the capillary tube 103 that is the other of the workpieces 501.
- the capillary tube pressing member 820 presses the side surface of the capillary tube 103 toward the suction pipe 105.
- the work holding device may include at least the suction pipe pressing member 810 and the capillary tube pressing member 820, but the supporting member 830 (in the drawing, supporting the lower surface of the suction pipe 105 and the lower surface of the capillary tube 103).
- the suction pipe lower surface support portion 831 and the support column 832, and the capillary tube lower surface support portion 833 and the support column 834) are provided, so that the workpiece 501 can be held more stably.
- Reference numeral 840 denotes a floor portion that supports the columns 813, 823, 832, and 834.
- the support column 813 and the support column 823 are arranged outside the high-frequency induction heating coil 700, but may be arranged inside the high-frequency induction heating coil 700.
- the outer surfaces of the aluminum-made suction pipe 105 and the aluminum-made capillary tube 103 that are attached in parallel are forcibly adhered, that is, pressed. It is essential. For this reason, the total length of the workpiece holding device may be substantially equal to the coil length of the high frequency induction heating coil 700.
- the suction pipe pressing member 810 is represented by a suction pipe contact portion 811
- the capillary tube pressing member 820 is represented by a capillary tube contact portion 821.
- the support member 830 is represented by a suction pipe lower surface support portion 831 and a capillary tube lower surface support portion 833.
- the pressing direction of the suction pipe pressing member 810 is indicated by an arrow (an arrow ( ⁇ ) pointing from left to right in the drawing), and the pressing direction of the capillary tube pressing member 820 is indicated by an arrow (from right to left in the drawing). Displayed with a pointing arrow ( ⁇ ). In FIGS. 9 and 10, the display of the brazing material 502 is also omitted.
- the suction pipe pressing member 810 (represented by the suction pipe contact portion 811 in the figure) faces the side surface of the suction pipe 105 toward the center (reference character OS) of the suction pipe in a horizontal direction (left to right in the drawing).
- the side of the capillary tube 103 with the capillary tube pressing member 820 (represented by the capillary tube contact portion 821 in the figure) toward the center (symbol OC) of the capillary tube. What is necessary is just to press in the direction of the arrow ( ⁇ ) pointing from right to left in the drawing.
- the support member 830 (represented by the suction pipe lower surface support portion 831 and the capillary tube lower surface support portion 833 in the figure) may be omitted. Stabilize. The degree of stability depends on the area where the suction pipe contact portion 811 and the capillary tube contact portion 821 are in contact with the side surface of the suction pipe 105 and the side surface of the capillary tube 103 (hereinafter referred to as the contact area), but from the viewpoint of thermal efficiency. The contact area is preferably as small as possible. If the contact area is reduced, either one or both of the workpieces 501 may be separated upward.
- the suction pipe pressing member 810 (represented by the suction pipe contact portion 811 in the figure) has the side surface of the suction pipe 105 obliquely upward (toward the drawing) toward the center (reference symbol OS) of the suction pipe. (In the direction of the arrow from diagonally upper left to diagonally lower right).
- the capillary tube pressing member 820 (represented by the capillary tube contact portion 821 in the figure) has the side surface of the capillary tube 103 obliquely upward from the upper side of the capillary tube (reference numeral OC) (from diagonally upper right to diagonally lower left as viewed in the drawing). It is configured so that it is pressed).
- a support member 830 (represented by a suction pipe lower surface support portion 831 and a capillary tube lower surface support portion 833 in the drawing) is preferably provided.
- the aluminum material supplied with the brazing material while stably moving the outer surfaces of the aluminum-made suction pipe 105 and the aluminum-made capillary tube 103 in pressure contact with each other.
- the brazing material is melted and a fillet (not shown) can be formed at the joint.
- the shapes of the suction pipe contact portion 811 and the capillary tube contact portion 821 are the side shapes of the suction pipe 105 and the capillary tube 103, respectively. The same R shape. Further, the upper side of the suction pipe contact portion 811 and the capillary tube contact portion 821 is curved outward so that the workpiece 501 moves smoothly. *
- the material of the workpiece holding device there is no particular limitation on the material of the workpiece holding device, but a material that does not generate heat or does not generate heat easily by high frequency induction heating is preferable.
- materials that do not generate heat due to high-frequency induction heating are used as materials for members (a suction pipe contact portion 811, a capillary tube contact portion 821, a suction pipe lower surface support portion 831, a capillary tube lower surface support portion 833) that are in contact with the work 501 of the work holding device
- a nonmagnetic ceramic is preferable.
- any structure can be used as long as the suction pipe 105 and the capillary tube 103 can be kept in parallel.
- the same structure as the work holding device described above can be used.
- a work 501 is formed by adding a 3,000 mm aluminum suction pipe 105 and a 3,000 mm aluminum capillary tube 103 in parallel, and the work 501 is held by a jig having the same structure as the work holding device described above.
- the high-frequency induction heating coil 700 having a coil length of 20 cm is used, the overall length of the work holding device, which is a jig, is approximately 20 cm.
- the workpiece 501 is supplied with a brazing material and is applied with a flux, but since it is the same as that described in the first manufacturing method, the details are omitted.
- a heat-resistant resin stopper (not shown) with a thin steel wire attached to one end is fitted into each opening of the suction pipe 105 and the capillary tube 103 as the work 501, and the tip of the wire (see FIG. (Not shown) passes through the work holding device shown in FIG. 7 and is arranged outside the high-frequency induction heating coil 700 in the direction indicated by the arrow ( ⁇ ) (from right to left in the drawing of FIG. 7). (Not shown).
- the heat-resistant resin plug, the thin steel wire, and the driving device cooperate to function as means for conveying the work 501 prepared in the jig to the work holding device shown in FIG. 7 (hereinafter referred to as conveying means). .
- the jig in which the workpiece 501 is prepared and the workpiece holding device shown in FIG. 7 are arranged in series.
- the workpiece 501 prepared in the jig is in a state where the outer surface of the suction pipe 105 and the outer surface of the capillary tube 103 are in pressure contact. In this state, the workpiece 501 is conveyed to the workpiece holding device shown in FIG.
- the oscillation frequency to be used is preferably one wave of 20 kHz to 200 kHz, and the heating output is preferably in the range of 20 kW to 40 kW.
- the conveyance speed by a workpiece conveyance means changes with kinds and heating output of a brazing material, it is about 0.5 m / min to about 15 m / min.
- the work 501 conveyed to the work holding device is pressed by the suction pipe pressing member 810 toward the capillary tube 103 which is the other side of the work 501 at the side surface of the suction pipe 105. Further, the side surface of the capillary tube 103 is pressed toward the suction pipe 105 by the capillary tube pressing member 820. As described above, since the side surfaces of the suction pipe 105 and the capillary tube 103 are respectively pressed, the outer surface of the suction pipe 105 and the outer surface of the capillary tube 103 are heated in a pressed state, that is, in a close contact state.
- the brazing material 502 starts to melt gradually from the vicinity of the inlet of the high frequency induction heating coil 700 (right side as viewed in FIG.
- the brazing material was used as the brazing material, and a non-corrosive fluoride flux was used.
- the heating output was 20 kW so that the brazing temperature was 602 ° C. ⁇ 5 ° C.
- the workpiece conveyance speed was 0.5 m / min.
- the work 501 carried out from the high frequency heating coil 700 is gradually cooled at room temperature, and the fillet 201 is solidified. It was confirmed that the aluminum suction pipe 105 and the aluminum capillary tube 103 had no pinholes and were continuously brazed. Further, since the workpiece 501 is gradually cooled, an annealing effect can be obtained and bending can be easily performed.
- the heat exchanger 106A according to the present invention can also be manufactured by a laser brazing method.
- an aluminum suction pipe and an aluminum capillary tube which are supplied with a brazing material selected from an Al—Si alloy or a Zn—Al alloy and applied flux, are attached to the jig in parallel.
- the brazing material may be solidified by melting the brazing material by using a laser beam as a heat source for heating the brazing material in the heated state, forming a fillet at a location where the suction pipe and the capillary tube are joined, and then cooling.
- a method for manufacturing a heat exchanger of a refrigeration cycle by a laser brazing method according to the present invention is configured to sequentially circulate refrigerant discharged from a compressor to a condenser, a capillary tube, an evaporator, a suction pipe, and the compressor.
- the outer surface of the capillary tube and the outer surface of the suction pipe are in thermal contact with each other.
- the workpiece is an aluminum material suction pipe and an aluminum material capillary tube arranged in parallel with the jig.
- the workpiece is made of an Al—Si alloy or Zn—.
- a brazing material selected from Al alloys is supplied and flux is applied. 2) The brazing material is irradiated with the laser beam while moving the workpiece prepared in the jig relative to the laser beam. Forming a fillet where the brazing filler metal melts and where the suction pipe and the capillary tube join; 3) cooling the workpiece and solidifying the fillet; A heat exchanger of a refrigeration cycle is manufactured by the laser brazing method having the above steps 1) to 3).
- what is prepared as a workpiece may be the same as the workpiece 501 of the first manufacturing method.
- the workpiece prepared in the jig may be arranged in a state in which an aluminum material suction pipe and an aluminum material capillary tube are attached in parallel as in the first manufacturing method.
- the brazing material is melted, and a fillet can be formed at a location where the suction pipe and the capillary tube are joined.
- the laser is applied to the brazing material in a state where the outer surfaces of the aluminum suction pipe and the aluminum capillary tube are forcibly brought into close contact with each other, that is, in a pressure contact state. You may irradiate a beam.
- the work holding device used in the second manufacturing method can be used as the jig.
- a pressing jig similar to the third manufacturing method can be used.
- a laser welding machine used in a third manufacturing method described later can be used.
- an Al—Si alloy is used as the brazing material
- conditions similar to those in the third manufacturing method can be used as the laser beam irradiation conditions.
- the configuration diagram of the refrigeration cycle using the heat exchanger 106B according to the present invention is the same as the configuration diagram of the refrigeration cycle shown in FIG.
- an aluminum material suction pipe 105 and an aluminum material capillary tube 103 constitute a heat exchanger 106B according to the present invention (see FIG. 11).
- the joint portion between the outer surface of the suction pipe 105 and the outer surface of the capillary tube 103 is joined in a state where each outer surface is melted.
- FIG. 11 is a perspective view showing a heat exchanger 106B according to the present invention.
- the materials of the capillary tube 103 and the suction pipe 105 constituting the heat exchanger 106B according to the present invention are both aluminum materials. Since the outer surface of the capillary tube 103 and the outer surface of the suction pipe 105 are bonded in a state where each outer surface is melted by the laser beam irradiation, the capillary tube 103 and the suction pipe 105 are heated with each other. Are in contact with each other.
- the shape, length, outer diameter, inner diameter, etc. of the capillary tube 103 and the suction pipe 105 constituting the heat exchanger 106B according to the present invention are the same as those of the current refrigerator-freezer or refrigeration apparatus except that the material is aluminum. It is almost the same as the capillary tube and suction pipe used in Further, the aluminum material that is a material of the suction pipe 105 and the capillary tube 103 may be aluminum or an aluminum alloy.
- FIG. 12 is a conceptual diagram of a laser welding machine used when manufacturing the third manufacturing method, that is, the heat exchanger 106B according to the present invention.
- a fiber laser welder is exemplified as the laser welder.
- Reference numeral 1301 denotes a fiber laser body
- reference numeral 1302 denotes an optical fiber (fiber diameter ⁇ )
- reference numeral 1303 denotes a laser beam emitting unit.
- a laser beam LB (line indicated by a broken line in the drawing) guided to the laser beam emitting unit 1303 is converted into a parallel beam by the lens L1 (focal length f 1 ), and then condensed by the lens L2 (focal length f 2 ).
- a workpiece 1405 (described with reference to FIG. 13) that moves in one direction with respect to the laser beam LB is irradiated with the laser beam LB having a predetermined spot diameter.
- the workpiece 1405 is in a state where the outer surfaces of the aluminum suction pipe 105 and the aluminum capillary tube 103 are pressed against each other while being pressed by the pressing rollers 1401 and 1402 (see FIG. 13). However, this is illustrated in a simplified manner. In this figure, it is assumed that the workpiece 1405 is moving in a direction indicated by an arrow ( ⁇ ) (from left to right as viewed in the drawing).
- Reference numeral 1308 denotes a nitrogen cylinder, and reference numeral 1307 denotes a nitrogen gas injection nozzle.
- Laser welding can also use an inert gas such as argon gas to prevent oxidation of the workpiece 1405.
- FIG. 13 illustrates a workpiece 1405 (which is a state in which an aluminum material suction pipe 105 and an aluminum material capillary tube 103 are attached in parallel) by pressing rollers 1401 and 1402 which are pressing jigs. It is a figure which shows the state which each press-contacts the outer surface of each suction pipe 105 and the capillary tube 103.
- FIG. FIG. 13A is a side view
- FIG. 13B is a plan view.
- the pressing roller 1401 is configured to press the side surface of the suction pipe 105 toward the capillary tube 103.
- the pressing roller 1401 is a grooved roller in which an arc-shaped groove matching the outer diameter of the suction pipe 105 is formed.
- the pressing roller 1402 is configured to press the side surface of the capillary tube 103 toward the suction pipe 105.
- the pressing roller 1402 is a grooved roller in which an arc-shaped groove matching the outer diameter of the capillary tube 103 is formed.
- Reference numeral 1403 is a shaft of the pressing roller 1401
- reference numeral 1404 is a shaft of the pressing roller 1402.
- the shaft 1403 and / or the shaft 1404 is fixed to a housing (not shown) so as to be adjustable in position in the axial direction and in the vertical direction (directions of lines passing through the center points of the suction pipe 105 and the capillary tube 103). Yes.
- the workpiece 1405 is pressed by two pairs of pressing rollers 1401 and 1402 provided at appropriate intervals to press-contact the outer surfaces of the suction pipe 105 and the capillary tube 103, but this is not limitative. Absent.
- the workpiece 1405 may be pressed by a pair of pressing rollers 1401 and 1402 so that the outer surfaces of the suction pipe 105 and the capillary tube 103 are pressed against each other. Further, like a method of manufacturing the heat exchanger 106B according to the present invention in a fully automatic manner as shown in FIG. 16 described later, the pair of pressing rollers 1401 and 1402 and the pair of guide rollers 1701 and 1702 cooperate.
- a pressing jig may be configured, and the workpiece 1405 may be pressed to bring the outer surfaces of the suction pipe 105 and the capillary tube 103 into pressure contact with each other.
- a material for the pressing rollers 1401 and 1402 a material having good thermal conductivity such as copper, brass, and aluminum, or a polymer such as urethane can be used. .
- FIG. 14 is a schematic view for explaining the third manufacturing method
- FIG. 14 (a) is a view from the side
- FIG. 14 (b) is a plan view.
- a state is shown in which laser welding is performed while the outer surfaces of the suction pipe 105 and the capillary tube 103 are pressed against each other while the workpiece 1405 is pressed by a pair of pressing rollers 1401 and 1402 and nitrogen gas is blown.
- This workpiece 1405 is moved in the direction of the arrow ( ⁇ ) with respect to the laser beam LB (from the right to the left as viewed in the drawing).
- the moving speed of the workpiece 1405 can be increased as the output of the fiber laser increases, but as a guide, the peak output of the fiber laser is about 3 watts to about 5 m / min at about 1000 W.
- the direction of irradiation of the laser beam LB on the workpiece 1405 is preferably irradiated from an oblique direction to the workpiece 1405 in order to avoid return light from the workpiece 1405.
- the inclination of the laser beam emitting unit 1303 is inclined upstream in the workpiece movement direction (the laser beam LB is irradiated toward the front side in the traveling direction of the workpiece 1405), or the workpiece. It may be tilted downstream in the movement direction (the laser beam LB is irradiated toward the rear side in the traveling direction of the workpiece 1405).
- the irradiation position of the laser beam LB with respect to the workpiece 1405 is preferably a range immediately after the downstream side in the moving direction of the chemical workpiece from the position where the pair of pressing rollers 1401 and 1402 presses the chemical workpiece 1405, more preferably a pair.
- the pressing rollers 1401 and 1402 are positions where the workpiece 1405 is pressed. When the workpiece 1405 is pressed by the two pairs of pressing rollers 1401 and 1402 and the outer surfaces of the suction pipe 105 and the capillary tube 103 are pressed, the irradiation position of the laser beam LB depends on the movement direction of the workpiece.
- a range immediately after the downstream side in the direction of movement of the chemical workpiece from the position where the pressing rollers 1401 and 1402 positioned on the downstream side of the workpiece press the chemical workpiece 1405 is preferable. More preferably, it is a position where the pressing rollers 1401 and 1402 positioned on the downstream side in the movement direction of the chemical object are pressing the chemical object 1405.
- FIG. 14B is the irradiation position of the laser beam LB further downstream than immediately after the downstream side in the direction of movement of the workpiece at the position where the pair of pressing rollers 1401 and 1402 press the workpiece 1405? It is drawn like this. This is convenient for drawing the laser beam emission unit 1303 and the nitrogen gas injection nozzle 1307 on the same plane.
- the laser in the workpiece moving direction with respect to the workpiece is not shown.
- the irradiation position of the beam can be set at an arbitrary position.
- the position where the nitrogen gas sprayed from the nitrogen gas spray nozzle 1307 is sprayed onto the workpiece 1405 is preferably substantially the same position as the irradiation position of the laser beam LB. Further, the direction in which the nitrogen gas is blown is preferably the same direction as the moving direction of the workpiece 1405. By blowing nitrogen gas in such a direction, the joint immediately after welding is also covered with the nitrogen gas atmosphere, so that the shielding from oxygen can be made more reliable.
- the gas flow rate of nitrogen gas is about 10 l / min (10 liters per minute).
- the symbol XXX in the contact portion between the suction pipe 105 and the capillary tube 103 is joined by melting the outer surfaces of the suction pipe 105 and the capillary tube 103 by laser beam welding. It shows the state.
- FIG. 15 is an enlarged view schematically showing a state in which the workpiece 1405 in which the outer surfaces of the suction pipe 105 and the capillary tube 103 are pressed against each other by a pressing roller (not shown) is irradiated with the laser beam LB. It is.
- FIG. 15A is a side view
- FIG. 15B is a plan view.
- the portion where the outer surfaces of the suction pipe 105 and the capillary tube 103 are in contact is irradiated.
- the laser beam LB is irradiated so as to sandwich a contact line LC formed by pressing the outer surfaces of the suction pipe 105 and the capillary tube 103 together.
- the spot diameter of the laser beam spot LBS is approximately ⁇ 0.05 mm to 0.6 mm.
- the irradiation position of the laser beam LB on the workpiece 1405 is preferably biased toward the suction pipe 105 as shown in FIG.
- the spot center SO of the laser beam LB is preferably closer to the suction pipe 105 side than the contact line LC.
- the spot center SO of the laser beam LB generally approaches the suction pipe side by about spot diameter ( ⁇ ) ⁇ 1/6 to spot diameter ( ⁇ ) ⁇ 1/3 with reference to the contact line LC. It is preferable.
- FIG. 16 is a conceptual diagram showing a method for manufacturing the heat exchanger 106B according to the present invention fully automatically.
- Reference numerals 1703 and 1704 are drive rollers
- reference numerals 1401 and 1402 are pressing rollers
- reference numerals 1701 and 1702 are guide rollers.
- the uncoiler device 1705 is equipped with a capillary tube aluminum tube CA and a suction pipe aluminum tube SA wound in a coil shape.
- Drive rollers 1703 and 1704 driven by a motor (not shown) are configured to convey the workpiece 1405 in the ⁇ direction (left to right as viewed in the drawing).
- the aluminum pipe SA for suction pipe and the aluminum pipe CA for capillary tube drawn out from the uncoiler device 1705 pass through the straightening devices 1706 and 1707 arranged downstream, so that the curl is corrected and led to the guide rollers 1701 and 1702. It is burned.
- the suction pipe aluminum pipe SA and the capillary tube aluminum pipe CA are placed in parallel by the guide rollers 1701 and 1702 and further conveyed toward the pressing rollers 1401 and 1402 arranged downstream.
- the guide rollers 1701 and 1702 and the pressure rollers 1401 and 1402 arranged downstream thereof constitute a pressing jig to press the workpiece 1405 to press the workpiece pipe 1405 and the capillary tube aluminum pipe CA. Each of the outer surfaces is in a pressure contact state.
- the laser beam emitting unit 1303 is arranged so that the irradiation position of the laser beam LB on the workpiece 1405 is a position where the pair of pressing rollers 1401 and 1402 presses the workpiece 1405.
- the nitrogen gas injection nozzle 1307 is configured so that the blowing direction of nitrogen gas is the same as the moving direction of the workpiece 1405, and the blowing position of the nitrogen gas with respect to the workpiece 1405 is substantially the same as the irradiation position of the laser beam LB. It arrange
- the workpieces welded by a cutting machine 1708 arranged on the downstream side of the driving rollers 1703 and 1704 are cut to a predetermined length.
- the heat exchanger 106B according to the present invention thus manufactured is configured to be loaded on the stocker 1709.
- FIG. 17 is a photograph of a heat exchanger 106B according to the present invention obtained by joining an aluminum suction pipe and an aluminum capillary tube using a fiber laser welding apparatus.
- the irradiation position of the laser beam LB with respect to the workpiece 1405 was adjusted to the position where the pressing rollers 1401 and 1402 pressed the workpiece 1405.
- the material of the pressing rollers 1401 and 1402 was made of copper.
- the experiment was performed at a moving speed of the workpiece 1405 of 30 mm / second and 50 mm / second. Further, nitrogen gas having a flow rate of 10 l / min (10 liters per minute) was used as the shielding gas and sprayed in the same direction as the moving direction of the workpiece 1405.
- the heat exchanger according to the present invention which is obtained by joining an aluminum suction pipe and an aluminum capillary tube, has a heat resistance compared to a current heat exchanger obtained by soldering a copper suction pipe and a copper capillary tube.
- the performance as an exchanger was not inferior.
- the heat exchanger according to the present invention can be used in a refrigeration apparatus, a refrigerator and the like.
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Abstract
Description
1)治具にワークを準備する工程;
(ア)前記ワークは、前記冶具にアルミニウム材製のサクションパイプとアルミニウム材製のキャピラリーチューブを並列に添わせた状態で配置したものである
(イ)前記ワークは、Al-Si合金またはZn-Al合金から選ばれるろう材が供給されフラックスが施されている
2)前記治具に準備された前記ワークを前記冶具とともに予め加熱されているろう付け炉に搬入する工程;
3)前記ワークが加熱され前記ろう材が溶融し前記サクションパイプと前記キャピラリーチューブが接合する箇所にフィレットが形成される工程;
4)前記ワークを冷却し前記フィレットを凝固する工程;
以上の1)~4)の工程を有する炉中ろう付け法により冷凍サイクルの熱交換器を製造することを特徴とするものである。
1)治具にワークを準備する工程;
(ア)前記ワークは、前記冶具にアルミニウム材製のサクションパイプとアルミニウム材製のキャピラリーチューブを並列に添わせた状態で配置したものである
(イ)前記ワークは、Al-Si合金またはZn-Al合金から選ばれるろう材が供給されフラックスが施されている
2)前記治具に準備された前記ワークを、少なくとも前記ワークと接触する部材が高周波誘導加熱コイルの内側に配置されたワーク保持装置に搬送する工程;
(ア)前記ワーク保持装置は、前記ワークの一方である前記サクションパイプの側面を前記ワークの他方である前記キャピラリーチューブに向けて押圧するサクションパイプ押圧部材と、前記キャピラリーチューブの側面を前記サクションパイプに向けて押圧するキャピラリーチューブ押圧部材を備えている
3)前記ワーク保持装置により前記アルミニウム材製のサクションパイプと前記アルミニウム材製のキャピラリーチューブのそれぞれの外表面を圧接させた状態で、前記ワークを前記高周波誘導加熱コイルの中を移動させながら、前記サクションパイプと前記キャピラリーチューブの外表面を前記高周波誘導加熱コイルで加熱し前記ろう材を溶融することにより前記サクションパイプと前記キャピラリーチューブが接合する箇所にフィレットを形成する工程;
4)前記ワークを冷却し前記フィレットを凝固する工程;
以上の1)~4)の工程を有する高周波誘導加熱法により冷凍サイクルの熱交換器を製造することを特徴とするものである。
i)アルミニウム材製のサクションパイプとアルミニウム材製のキャピラリーチューブを並列に添わせた状態で押さえ治具により押圧し、前記サクションパイプと前記キャピラリーチューブのそれぞれの外表面を圧接させた状態とし、
ii)前記サクションパイプと前記キャピラリーチューブのそれぞれの外表面を圧接させた状態でレーザービームに対して相対的に移動させながら、前記サクションパイプの外表面と前記キャピラリーチューブの外表面との接合箇所に前記レーザービームを照射することにより前記接合箇所であるそれぞれの外表面を溶融し、前記サクションパイプと前記キャピラリーチューブの外表面を接合する、ことを特徴とする。
1)治具にワークを準備する工程;
(ア)前記ワークは、前記冶具にアルミニウム材製のサクションパイプとアルミニウム材製のキャピラリーチューブを並列に添わせた状態で配置したものである
(イ)前記ワークは、Al-Si合金またはZn-Al合金から選ばれるろう材が供給されフラックスが施されている
2)前記治具に準備された前記ワークをレーザービームに対して相対的に移動させながら前記レーザービームを前記ろう材に照射し前記ろう材が溶融し前記サクションパイプと前記キャピラリーチューブが接合する箇所にフィレットを形成する工程;
3)前記ワークを冷却し前記フィレットを凝固する工程;
以上の1)~3)の工程を有するレーザーろう付け法により冷凍サイクルの熱交換器を製造することを特徴とするものである。
図13は、押さえ治具である押圧ローラー1401、1402により被加工物1405(アルミニウム材製のサクションパイプ105とアルミニウム材製のキャピラリーチューブ103を並列に添わせた状態のものをいう。)を押圧しサクションパイプ105とキャピラリーチューブ103のそれぞれの外表面を圧接させている状態を示す図である。図13(a)は側面から見た図であり、図13(b)は平面図である。
アルミニウム製サクションパイプ;
外径:φ6.4mm、肉厚:0.7mm、内径:φ5mm、
アルミニウム製キャピラリーチューブ;
外径:φ2mm、肉厚:0.7mm、内径:φ0.6mm、
ファイバーレーザー溶接機
発振波長:1070~1100nm、光ファイバー302のファイバー径:φ0.1mm、レンズL1の焦点距離(f1):100mm、レンズL2の焦点距離(f2):200mm、レーザービームスポット径:φ0.2mm、ピーク出力:800W、
レーザービームスポット径:φ0.2mmで焦点位置を被化工物1405の表面とし、レーザービームLBのスポット中心SOは、前記接触線LCを基準として(図15を参照。)、0.05mmだけサクションパイプ側に寄った位置に調整し、被化工物1405に対するレーザービームLBの照射位置は、押圧ローラー1401、1402が被化工物1405を押圧している位置に調整した。押圧ローラー1401、1402の素材は銅製とした。被加工物1405の移動速度を30mm/秒、50mm/秒で実験を行った。また、シールドガスとして流量が10l/分(毎分10リットル)の窒素ガスを用い被加工物1405の移動方向と同じ方向に吹き付けた。
105 サクションパイプ
106A、106B 熱交換器
201 フィレット
400 治具
501 ワーク
502 ろう材
600 ろう付け炉
700 高周波誘導加熱コイル
810 サクションパイプ押圧部材
811 サクションパイプ接触部
820 キャピラリーチューブ押圧部材
821 キャピラリーチューブ接触部
830 支持部材
831 サクションパイプ下面支持部
833 キャピラリーチューブ下面支持部
1303 レーザービーム出射ユニット
1307 窒素ガス噴射ノズル
LB レーザービーム
1401、1402 押圧ローラー
1405 被加工物
LC 接触線
LBS レーザービームスポット
SO スポット中心
SA サクションパイプ用アルミニウム管
CA キャピラリーチューブ用アルミニウム管
Claims (7)
- 圧縮機から吐出された冷媒を凝縮器、キャピラリーチューブ、蒸発器、サクションパイプ及び前記圧縮機に順次循環するように構成され、前記キャピラリーチューブの外表面と前記サクションパイプの外表面とが互いに熱的に接触している冷凍サイクルの熱交換器において、
前記キャピラリーチューブと前記サクションパイプの素材がともにアルミニウム材であり、前記キャピラリーチューブの外表面と前記サクションパイプの外表面との接合箇所はAl-Si合金またはZn-Al合金から選ばれるろう材のフィレットが形成された状態で接合していることを特徴とする冷凍サイクルの熱交換器。 - 前記ろう材がAl-Si合金であることを特徴とする請求項1記載の冷凍サイクルの熱交換器。
- 圧縮機から吐出された冷媒を凝縮器、キャピラリーチューブ、蒸発器、サクションパイプ及び前記圧縮機に順次循環するように構成され、前記キャピラリーチューブの外表面と前記サクションパイプの外表面とが互いに熱的に接触している冷凍サイクルの熱交換器の製造方法において、
1)治具にワークを準備する工程;
(ア)前記ワークは、前記冶具にアルミニウム材製のサクションパイプとアルミニウム材製のキャピラリーチューブを並列に添わせた状態で配置したものである
(イ)前記ワークは、Al-Si合金またはZn-Al合金から選ばれるろう材が供給されフラックスが施されている
2)前記治具に準備された前記ワークを前記冶具とともに予め加熱されているろう付け炉に搬入する工程;
3)前記ワークが加熱され前記ろう材が溶融し前記サクションパイプと前記キャピラリーチューブが接合する箇所にフィレットが形成される工程;
4)前記ワークを冷却し前記フィレットを凝固する工程;
以上の1)~4)の工程を有することを特徴とする冷凍サイクルの熱交換器の製造方法。 - 圧縮機から吐出された冷媒を凝縮器、キャピラリーチューブ、蒸発器、サクションパイプ及び前記圧縮機に順次循環するように構成され、前記キャピラリーチューブの外表面と前記サクションパイプの外表面とが互いに熱的に接触している冷凍サイクルの熱交換器の製造方法において、
Al-Si合金またはZn-Al合金から選ばれるろう材が供給されフラックスが施されたアルミニウム材製のサクションパイプとアルミニウム材製のキャピラリーチューブを並列に添わせた状態のワークを、前記サクションパイプと前記キャピラリーチューブのそれぞれの外表面を圧接させた状態で、高周波誘導加熱コイルの中を相対的に移動させながら、前記サクションパイプの外表面と前記キャピラリーチューブの外表面を前記高周波誘導加熱コイルで加熱し前記ろう材を溶融することにより前記サクションパイプと前記キャピラリーチューブが接合する箇所にフィレットを形成し、次いで冷却し前記フィレットを凝固することを特徴とする冷凍サイクルの熱交換器の製造方法。 - 圧縮機から吐出された冷媒を凝縮器、キャピラリーチューブ、蒸発器、サクションパイプ及び前記圧縮機に順次循環するように構成され、前記キャピラリーチューブの外表面と前記サクションパイプの外表面とが互いに熱的に接触している冷凍サイクルの熱交換器の製造方法において、
1)治具にワークを準備する工程;
(ア)前記ワークは、前記冶具にアルミニウム材製のサクションパイプとアルミニウム材製のキャピラリーチューブを並列に添わせた状態で配置したものである
(イ)前記ワークは、Al-Si合金またはZn-Al合金から選ばれるろう材が供給されフラックスが施されている
2)前記治具に準備された前記ワークを、少なくとも前記ワークと接触する部材が高周波誘導加熱コイルの内側に配置されたワーク保持装置に搬送する工程;
(ア)前記ワーク保持装置は、前記ワークの一方である前記サクションパイプの側面を前記ワークの他方である前記キャピラリーチューブに向けて押圧するサクションパイプ押圧部材と、前記キャピラリーチューブの側面を前記サクションパイプに向けて押圧するキャピラリーチューブ押圧部材を備えている
3)前記ワーク保持装置により前記アルミニウム材製のサクションパイプと前記アルミニウム材製のキャピラリーチューブのそれぞれの外表面を圧接させた状態で、前記ワークを前記高周波誘導加熱コイルの中を移動させながら、前記サクションパイプと前記キャピラリーチューブの外表面を前記高周波誘導加熱コイルで加熱し前記ろう材を溶融することにより前記サクションパイプと前記キャピラリーチューブが接合する箇所にフィレットを形成する工程;
4)前記ワークを冷却し前記フィレットを凝固する工程;
以上の1)~4)の工程を有することを特徴とする冷凍サイクルの熱交換器の製造方法。 - 圧縮機から吐出された冷媒を凝縮器、キャピラリーチューブ、蒸発器、サクションパイプ及び前記圧縮機に順次循環するように構成され、前記キャピラリーチューブの外表面と前記サクションパイプの外表面とが互いに熱的に接触している冷凍サイクルの熱交換器において、
前記キャピラリーチューブと前記サクションパイプの素材がともにアルミニウム材であり、前記キャピラリーチューブの外表面と前記サクションパイプの外表面との接合箇所はそれぞれの外表面が溶融した状態で接合していることを特徴とする冷凍サイクルの熱交換器。 - 圧縮機から吐出された冷媒を凝縮器、キャピラリーチューブ、蒸発器、サクションパイプ及び前記圧縮機に順次循環するように構成され、前記キャピラリーチューブの外表面と前記サクションパイプの外表面とが互いに熱的に接触している冷凍サイクルの熱交換器の製造方法において、
i)アルミニウム材製のサクションパイプとアルミニウム材製のキャピラリーチューブを並列に添わせた状態で押さえ治具により押圧し、前記サクションパイプと前記キャピラリーチューブのそれぞれの外表面を圧接させた状態とし、
ii)前記サクションパイプと前記キャピラリーチューブのそれぞれの外表面を圧接させた状態でレーザービームに対して相対的に移動させながら、前記サクションパイプの外表面と前記キャピラリーチューブの外表面との接合箇所に前記レーザービームを照射することにより前記接合箇所であるそれぞれの外表面を溶融し、前記サクションパイプと前記キャピラリーチューブの外表面を接合する、
ことを特徴とする冷凍サイクルの熱交換器の製造方法。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/879,600 US20130269914A1 (en) | 2010-10-14 | 2011-10-11 | Heat Exchanger for Refrigeration Cycle and Manufacturing Method for Same |
JP2012538680A JP5900967B2 (ja) | 2010-10-14 | 2011-10-11 | 冷凍サイクルの熱交換器及びその製造方法 |
KR1020137008862A KR101446695B1 (ko) | 2010-10-14 | 2011-10-11 | 냉동 사이클의 열교환기 및 그 제조방법 |
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JP (1) | JP5900967B2 (ja) |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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EP2796825A1 (en) | 2013-04-22 | 2014-10-29 | Terumasa Matsumoto | Heat exchanger for refrigeration cycle |
CN104121730A (zh) * | 2013-04-24 | 2014-10-29 | 松本辉政 | 用于制冷循环的热交换器 |
WO2015106569A1 (zh) * | 2014-01-14 | 2015-07-23 | 杜益冕 | 一种轻质铝系回流管及其生产方法、生产送料装置和应用 |
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DE102014200820A1 (de) * | 2014-01-17 | 2015-07-23 | Siemens Aktiengesellschaft | Verfahren zur Herstellung eines wenigstens eine Wärmeübertragungsfläche aufweisenden Wärmetauschers |
CN106735700B (zh) * | 2016-12-28 | 2022-03-22 | 合肥宏立制冷科技有限公司 | 一种钢管与毛细管并焊专用扶捋冷却装置 |
KR20190073857A (ko) | 2017-12-19 | 2019-06-27 | 엘지전자 주식회사 | 냉장고 |
CN114729791A (zh) * | 2019-08-09 | 2022-07-08 | 海德鲁挤压解决方案巴西有限公司 | 用于制冷设备的膨胀装置 |
EP4039402B1 (en) | 2021-02-04 | 2023-08-09 | "SINTUR" Sp. z o.o. | A method of bonding a capillary tube and a suction pipe by means of a fiber laser welding head and corresponding apparatus |
KR102530057B1 (ko) * | 2021-04-16 | 2023-05-08 | 태성전기(주) | 3열이 적용된 냉장고의 석션파이프 어셈블리 |
KR102467585B1 (ko) * | 2021-05-27 | 2022-11-16 | 유남전기 주식회사 | 레이져 용접형 석션파이프 어셈블리 제조장치 |
EP4141360A1 (de) * | 2021-08-26 | 2023-03-01 | Liebherr-Hausgeräte Ochsenhausen GmbH | Kühl- und/oder gefriergerät |
KR102622254B1 (ko) * | 2021-12-28 | 2024-01-08 | 태성전기(주) | 냉장고용 냉매관 제조장치 |
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Also Published As
Publication number | Publication date |
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JPWO2012050085A1 (ja) | 2014-02-24 |
KR101446695B1 (ko) | 2014-10-06 |
JP5900967B2 (ja) | 2016-04-06 |
US20130269914A1 (en) | 2013-10-17 |
KR20130069794A (ko) | 2013-06-26 |
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