WO2021029556A1 - 열교환기 및 상기 열교환기를 포함하는 가전제품의 제조방법 - Google Patents
열교환기 및 상기 열교환기를 포함하는 가전제품의 제조방법 Download PDFInfo
- Publication number
- WO2021029556A1 WO2021029556A1 PCT/KR2020/009639 KR2020009639W WO2021029556A1 WO 2021029556 A1 WO2021029556 A1 WO 2021029556A1 KR 2020009639 W KR2020009639 W KR 2020009639W WO 2021029556 A1 WO2021029556 A1 WO 2021029556A1
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- weight
- clothes dryer
- coating layer
- heat exchanger
- connection pipe
- Prior art date
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F58/00—Domestic laundry dryers
- D06F58/20—General details of domestic laundry dryers
- D06F58/206—Heat pump arrangements
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F58/00—Domestic laundry dryers
- D06F58/20—General details of domestic laundry dryers
- D06F58/24—Condensing arrangements
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F58/00—Domestic laundry dryers
- D06F58/02—Domestic laundry dryers having dryer drums rotating about a horizontal axis
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- 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
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
- F28D1/0408—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids
- F28D1/0417—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids with particular circuits for the same heat exchange medium, e.g. with the heat exchange medium flowing through sections having different heat exchange capacities or for heating/cooling the heat exchange medium at different temperatures
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- 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
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
- F28D1/047—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag
- F28D1/0477—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag the conduits being bent in a serpentine or zig-zag
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
- F28F1/32—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular 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
- F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
- F28F19/02—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
- F28F19/02—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings
- F28F19/04—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings of rubber; of plastics material; of varnish
-
- 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
- F28F21/081—Heat exchange elements made from metals or metal alloys
- F28F21/085—Heat exchange elements made from metals or metal alloys from copper or copper alloys
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2245/00—Coatings; Surface treatments
-
- 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
- F28F2275/04—Fastening; Joining by brazing
- F28F2275/045—Fastening; Joining by brazing with particular processing steps, e.g. by allowing displacement of parts during brazing or by using a reservoir for storing brazing material
Definitions
- the present invention relates to a heat exchanger and a home appliance including the heat exchanger.
- heat exchangers are very diverse, but among them, heat exchangers generally used in home appliances have a form in which a plurality of fins are coupled to the outer peripheral surface of a pipe. Refrigerant flows inside the pipe, and fins promote heat exchange between air and heat through the pipe.
- Korean Patent Laid-Open Publication No. 2000-0060105 discloses a technique of coating a zinc alloy on the surface of the aluminum tube in order to improve the corrosion resistance of the aluminum tube. Since the heat exchanger used as a condenser (condenser) is exposed to a corrosive environment in which a lot of chlorides and sulfides exist in the structure of automobiles, the patent document describes that the tube can be protected from corrosion by coating zinc alloy.
- the occurrence of rust or corrosion in the heat exchanger is strongly affected by the environment in which the heat exchanger is used.
- the refrigerant evaporates in the heat exchanger used as an evaporator, condensing water in the air as a heat exchange target for the refrigerant, and the condensed water generated therefrom causes rust or corrosion.
- U.S. Patent No. 8,375,596 B2 discloses a configuration in which a coating layer having a maximum surface energy of 40mN/m is formed on the surface of a heat exchanger used in a household dryer in consideration of this point.
- a coating layer having a maximum surface energy of 40mN/m is formed on the surface of a heat exchanger used in a household dryer in consideration of this point.
- 40 mN/m of surface energy disclosed in this patent document is not clear, and it is only mentioned that a coating layer is formed on various metal surfaces with a material containing a polysiloxane resin. There is less concreteness as to whether to form.
- An object of the present invention is to propose a configuration capable of preventing rust or corrosion from occurring on the surface of a heat exchanger through a coating.
- the present invention is to propose a configuration capable of preventing rust or corrosion from occurring in a pipe made of a copper material.
- Another object of the present invention is to provide dimensions of a welded portion capable of suppressing rust or corrosion easily occurring in a welded portion of a copper pipe.
- Another object of the present invention is to provide a thickness of a coating layer that effectively prevents rust or corrosion.
- Another object of the present invention is to provide a method for manufacturing a home appliance having a configuration capable of preventing deterioration of the coating layer formed in the process of manufacturing a home appliance including a heat exchanger in a subsequent welding process.
- the heat exchanger includes a coating layer formed on a surface of a copper pipe, and the coating layer provides corrosion resistance to the copper pipe.
- the copper pipe includes a straight tube and a return bend, and burrs having a circumference larger than the outer diameter of each straight tube are formed at both ends of the straight tube by expansion, and the rim of the bur and the outer surface of the straight tube The distance between them is 0.4mm to 1.8mm.
- the coating layer may be formed of the first to fourth paints.
- the first paint contains polyurethane resin (POLYURETHANE RESIN).
- the first paint further contains xylene, dimethyl carbonate, and ethylbenzene.
- the polyurethane resin is 33.2 to 40% by weight
- the xylene is 30 to 31.7% by weight
- the dimethyl carbonate is 23.2 to 30% by weight
- the ethylbenzene is 1 to 5.1% by weight.
- the second paint contains acrylic and carbon.
- the third paint is butyl cellosolve, isobutyl alcohol, n-butyl alcohol, bisphenol A diglycidyl ether, ethylbenzene ), acrylic acid (acrylic acid) mixed polymer, xylene (Xylene) and melamine resin (melamine resin).
- the acrylic acid mixed polymer contains styrene, n-butyl methacrylate, 2-ethylhexylacrylate, and 2-hydroxyethyl acrylate.
- the butyl cellosolve in the paint is 1 to 10% by weight
- the isobutyl alcohol is 1 to 10% by weight
- the n-butyl alcohol is 5 to 15% by weight
- the bisphenol A diglycidyl Ether is 1 to 10% by weight
- ethylbenzene is 15 to 25% by weight
- the acrylic acid mixed polymer is 28 to 38% by weight
- the xylene is 15 to 25% by weight
- the melamine resin is 5 to 15% by weight.
- the fourth paint is polymeric resin, deodorized kerosene, methyl isobutyl ketone, n-Butyl Acetate, isobutyl alcohol, and n-butyl.
- Alcohol n-butyl alcohol
- talc barium sulfate
- urea-malamine copolymer silicone epoxy copolymer
- PGMEA Propylene glycol methyl ether acetate
- Melamine-formaldehyde resin and optional additives.
- the polymer resin is 1 to 5% by weight
- the deodorized kerosene is 5 to 10% by weight
- the methyl isobutyl ketone is 5 to 10% by weight
- the n-butyl acetate is 1 to 5% by weight
- the Isobutyl alcohol is 5 to 10% by weight
- the n-butyl alcohol is 5 to 10% by weight
- the talc is 5 to 10% by weight
- the barium sulfate is 1 to 5% by weight
- the urea-melamine copolymer is 20 to 25% by weight
- the silicone epoxy copolymer is 5 to 10% by weight
- the PGMEA is 10 to 15% by weight
- the melamine-formaldehyde modified resin is 1 to 5% by weight
- the optional additive is 10 to 20% by weight %All.
- the heat exchanger includes the copper pipe, a plurality of fins and two end plates.
- the copper pipe forms a circulation passage for the refrigerant.
- the plurality of pins are arranged at positions spaced apart from each other in one direction, and are coupled to the outer peripheral surface of the copper pipe.
- the two end plates are formed of hot-dip galvanized steel sheets, and are disposed at positions spaced apart from each other with the plurality of pins therebetween.
- the plurality of straight tubes extend along the arrangement direction of the plurality of fins to pass through the plurality of fins and the two end plates.
- the plurality of return bends connect one end of one of the plurality of straight tubes protruding outward of the two ent plates to one end of the other straight tube.
- the coating layer is formed on the surfaces of the plurality of return bends, the surface of the welding portion formed at both ends of each return bend, and the surface of the burr.
- connection pipe having a length of 40 mm or more and 80 mm or less, respectively, and the connection Welds are formed at both ends of the pipe.
- the present invention provides a method of manufacturing a home appliance including a heat exchanger.
- the method of manufacturing a home appliance proposed in the present invention includes the steps of expanding a plurality of straight tubes to form burrs having a circumference larger than the outer diameter of each straight tube at both ends; Welding the straight tube and the return bend; And forming a coating layer providing corrosion resistance on the surface of the return bend, the surface of the welded portion formed at both ends of the return bend, and the surface of the bur, wherein in the forming of the burr, the edge of the bur and the Expand the pipe so that the distance between the outer surfaces of the straight tube is 0.4mm to 1.8mm.
- the manufacturing method includes the steps of arranging the plurality of pins at positions spaced apart from each other along one direction and inserting the straight tube one for each through hole formed in the plurality of fins before the step of forming the burr. Include more.
- the pipe is expanded so that the plurality of pins are coupled to the outer peripheral surface of each straight tube.
- the coating layer is formed by the first to fourth paints described above.
- the heat exchanger further includes two end plates disposed at positions spaced apart from each other with the plurality of fins interposed therebetween,
- the manufacturing method of the home appliance includes, between the welding step and the forming of the coating layer, at least 48 mm at the inlet end and the outlet end of the copper pipe protruding in the same direction toward the outside of any one of the two end plates. It further comprises the step of welding one end of the connection pipe having a length.
- the manufacturing method of the home appliance further includes the step of welding the other end of the connection pipe with the counterpart after the step of forming the coating layer.
- the present invention having the configuration as described above, since a coating layer providing corrosion resistance is formed on the surface of the return bend, the surface of the weld formed at both ends of the return bend, and the surface of the burr, the plate and the return bend are The occurrence of rust or corrosion on the surface can be suppressed or prevented.
- the distance between the rim of the burr and the outer surface of the straight tube is less than 0.4mm, welding may not be possible or leakage may occur due to the welding material. Since the distance set in the present invention is 0.4mm or more, this problem can be solved.
- the distance between the rim of the burr and the outer surface of the straight tube exceeds 1.8 mm, it provides an environment that is structurally susceptible to rust or corrosion.
- the distance set in the present invention is 1.8 mm or more, so this problem can be solved. .
- the coating layer formed by the first paint containing polyurethane resin provides corrosion resistance and waterproof performance, it is effective against rust or corrosion caused by condensed water.
- the coating layer formed by the second paint containing acrylic and carbon materials provides corrosion resistance and suppression of heat exchange rate reduction, it is effective not only to generate rust or corrosion, but also to maintain the original performance of the heat exchanger.
- the third paint not only provides corrosion resistance to the object for which the coating layer is formed, but also provides resistance to salt water, and further provides an aesthetic effect because it has a transparent property.
- the fourth paint provides excellent corrosion resistance and excellent resistance to salt water to the object for which the coating layer is formed.
- the connecting pipe since one end of the connecting pipe is first welded to the inlet end and the outlet end of the copper pipe, and after forming the coating layer, the counterpart is welded to the other end of the connecting pipe. It is possible to suppress deterioration of the coating layer.
- FIG. 1 is a perspective view of a heat exchanger according to an embodiment of the present invention and a capillary tube connected to the heat exchanger.
- FIG. 2 is a plan view of the evaporator shown in FIG. 1 and a capillary tube connected to the evaporator.
- FIG. 3 is a conceptual diagram showing an enlarged welded portion of a straight tube and a return bend.
- FIG. 4 is a graph showing a temperature measurement result of a pipe according to a position of a welding part.
- FIG. 5 is a flowchart of a method of manufacturing a home appliance according to an embodiment of the present invention.
- FIG. 6 is a conceptual diagram showing a step of forming a coating layer and a step before and after it during the manufacturing process of the home appliance according to the manufacturing method of FIG. 5.
- FIG. 7 is a perspective view of a clothing treatment apparatus for explaining an application example of the heat exchanger proposed in the present invention.
- FIG. 8 is a conceptual diagram illustrating circulation of air through the drum and circulation passage shown in FIG. 7.
- FIG. 9 is a plan view of the base cabinet shown in FIG. 7 and heat pump cycle devices mounted on the base cabinet.
- FIG. 1 is a perspective view of heat exchangers 120 and 140 related to an embodiment of the present invention and an expander 130 connected to the heat exchangers 120 and 140.
- FIG. 2 is a plan view of the evaporator 140 shown in FIG. 1 and the expander 130 connected to the evaporator 140.
- the heat exchangers 120 and 140 are used as the condenser 120 or the evaporator 140 in a refrigeration cycle device or a heat pump cycle device.
- the heat exchanger 120 and 140 includes copper pipes 121 and 141, a plurality of fins 122 and 142, and end plates 123 and 143.
- the copper pipes 121 and 141 are formed of a copper material and form a circulation passage for the heat exchange fluid.
- the heat exchange fluid may be, for example, a refrigerant.
- the copper pipes 121 and 141 pass through the plurality of pins 122 and 142 in a linear direction and change their direction from the outside of the pins 122 and 142 to repeatedly penetrate the plurality of pins 122 and 142. To form.
- the plurality of fins 122 and 142 are formed in the shape of a flat rectangular plate.
- the plurality of pins 122 and 142 are arranged at positions spaced apart from each other along one direction.
- the plurality of fins 122 and 142 are coupled to the outer peripheral surfaces of the copper pipes 121 and 141.
- the plurality of pins 122 and 142 may be formed of stainless steel.
- the plurality of fins 122 and 142 are for improving heat exchange efficiency of the heat exchangers 120 and 140 by expanding a heat exchange area.
- Two end plates 123 and 143 are provided in the heat exchangers 120 and 140.
- the two end plates 123 and 143 are disposed at positions spaced apart from each other with a plurality of pins 122 and 142 interposed therebetween.
- the end plates 123 and 143 are disposed one at the outermost side of the plurality of pins 122 and 142, respectively.
- the end plates 123 and 143 may have a square plate and a design (c) shape protruding from both ends of the square plate toward the outside of the heat exchangers 120 and 140.
- the end plates 123 and 143 may be formed of a galvanized sheet iron.
- the copper pipes 121 and 141 include a plurality of straight tubes 141a and a plurality of return bends 141b.
- the copper pipes 121 and 141 are provided with an inlet end (141c) into which a refrigerant flows in and an outlet end (121d, 141d) through which refrigerant flows out, and the straight tube (141a) and the return bend (141b) are inlet end (141c) They are alternately arranged from to the exit ends 121d and 141d.
- the straight tube 141a extends in a linear direction along the arrangement direction of the plurality of fins 122 and 142 and passes through the plurality of fins 122 and 142 and the two end plates 123 and 143. Further, the return bend 141b is formed to connect one end of one of the plurality of straight tubes 141a protruding outward of the two end plates 123 and 143 to one end of the other straight tube 141a.
- the return bend 141b may be bent along a curve to have a C shape.
- the straight tube 141a and the liter bend may be coupled to each other by welding.
- the pins 122 and 142 formed of stainless steel are very unlikely to cause rust or corrosion, but the pipes 121 and 141 formed of copper and the end plates 123 and 143 formed of hot-dip galvanized steel sheets rust. There is a possibility of corrosion. In particular, since copper is a material that is naturally oxidized, the possibility of rust or corrosion is very high.
- rust or corrosion may occur in both the straight tube 141a and the return bend 141b of the copper pipes 121 and 141, but rust or corrosion generated in the straight tube 141a is caused by a plurality of fins 122 and 142 and ends. It is not clearly visible visually by the plates 123 and 143. On the other hand, rust or corrosion generated in the return bend 141b is easily exposed visually.
- the present invention provides heat exchangers 120 and 140 configured to suppress or prevent occurrence of rust or corrosion with a coating layer formed on the surface of the two end plates 123 and 143 and/or the plurality of return bends 141b.
- the coating layer provides corrosion resistance to the surfaces of the two end plates 123 and 143 and/or the plurality of return bends 141b.
- the occurrence of rust or corrosion in the heat exchangers 120 and 140 has a very strong tendency to occur in the welded portion of the straight tube 141a and the return bend 141b.
- a structure of a welded portion capable of suppressing occurrence of rust or corrosion will be first described, and then a coating material for forming a coating layer will be described.
- FIG. 3 is a conceptual diagram showing an enlarged welded portion of the straight tube 141a and the return bend 141b.
- the straight tube 141a before expansion is called a hair pin, and expansion refers to an operation of expanding the inner and outer diameters of the hairpin.
- the outer diameter of the hairpin is smaller than the inner diameter of the through hole formed in the pin, but after the expansion, the outer diameter of the straight tube 141a becomes the same as the inner diameter of the through hole, so that the pin may be fixed to the outer peripheral surface of the straight tube 141a.
- burrs 141a' are formed at both ends of the straight tube 141a.
- the burr 141a' is a result of expansion of the pipe having a circumference larger than the outer diameter of the straight tube 141a, and the burr corresponds to a portion that is coupled to the return bend 141b by welding. Assuming that the straight tube 141a and the return bend 141b have the same outer diameter, the burr 141a' has a circumference larger than the outer diameter of the return bend 141b.
- burr 141a' When welding is performed by making the burr 141a' and the return bend 141b in close contact, a welded portion is formed between the burr 141a' and the return bend 141b.
- the size of the burr 141a' acts as an important structural factor causing rust or corrosion of the weld. Therefore, it is important to set the size of the burrs 141a' in order to secure the corrosion resistance of the heat exchangers 120 and 140.
- the distance A between the edge of the burr 141a' and the outer surface of the return bend 141b is less than 0.4mm, welding may not be possible due to an excessively small welding area. Even if welding is performed, not only water leakage may occur, but also the welding material flows during the welding operation, causing rust or corrosion. Conversely, if the above distance (A) is larger than 1.8mm, it acts as a factor that strongly induces rust or corrosion in a structural manner.
- the distance between the rim of the burr 141a' and the outer surface of the return bend 141b is understood to the extent that the burr 141a' protrudes from the outer surface of the straight tube 141a in the radial direction of the straight tube 141a having a cylindrical shape. Can be.
- the diameter (B) of the burr (141a') may be 10mm to 12mm.
- the burr 141a' is not formed only on the straight tube 141a, but may be formed at both ends of the return bend 141b.
- the burr 141a' of the straight tube 141a is a result formed as a result of the expansion, but the return bend 141b may not go through a separate expansion process, so the burr 141a' of the return bend 141b is a return bend It can be formed in the manufacturing process of (141b).
- a coating layer providing corrosion resistance to prevent rust or corrosion is formed on the surface of the return bend 141b, the surface of the welded portion formed at both ends of the return bend 141b, and the surface of the burr 141a'. Additionally, a coating layer may be formed on the surface of the end plates 123 and 143.
- the coating layer is formed by the paint.
- the paint corresponds to any one of the first to fourth paints.
- the first paint contains polyurethane resin (POLYURETHANE RESIN).
- the first paint may further contain xylene, dimethyl carbonate, and ethylbenzene.
- the polyurethane resin may be 33.2 to 40 wt%
- xylene may be 30 to 31.7 wt%
- dimethyl carbonate may be 23.2 to 30 wt%
- ethylbenzene may be 1 to 5.1 wt%.
- the coating layer When the coating layer is formed by the first paint having the above composition, the coating layer provides not only corrosion resistance but also waterproof performance.
- the heat exchanger (120, 140) is used as the evaporator (140) in the home appliance, the return bend (141b), the weld formed at both ends of the return bend (141b), and the surface of the burr (141a') Corrosion may be caused, but since the coating formed by the first paint provides corrosion resistance and waterproof performance, rust or corrosion may be inhibited or prevented.
- the second paint contains acrylic and carbon.
- the coating layer When the coating layer is formed by the second paint, the coating layer provides corrosion resistance.
- the second paint since the second paint contains a carbon component, there is an effect of preventing a decrease in heat exchange efficiency after coating.
- the third paint is butyl cellosolve, isobutyl alcohol, n-butyl alcohol, bisphenol A diglycidyl ether, ethylbenzene ), acrylic acid (acrylic acid) mixed polymer, xylene (Xylene) and melamine resin (melamine resin).
- the acrylic acid mixed polymer refers to a polymer containing styrene, n-butyl methacrylate, 2-ethylhexylacrylate, and 2-hydroxyethyl acrylate. Point.
- the butyl cellosolve is 1 to 10 wt%
- the isobutyl alcohol is 1 to 10 wt%
- the n-butyl alcohol is 5 to 15 wt%
- the bisphenol A diglycidyl ether is 1 to 10% by weight
- the ethylbenzene is 15 to 25% by weight
- the acrylic acid mixed polymer is 28 to 38% by weight
- the xylene is 15 to 25% by weight
- the melamine resin is 5 to 15% by weight.
- the third paint composed of the above composition not only provides corrosion resistance to the object for which the coating layer is formed, but also provides resistance to salt water, and further provides an aesthetic effect because it has transparent properties.
- the fourth paint is polymeric resin, deodorized kerosene, methyl isobutyl ketone, n-Butyl Acetate, isobutyl alcohol, and n-butyl.
- Alcohol n-butyl alcohol
- talc barium sulfate
- urea-malamine copolymer silicone epoxy copolymer
- PGMEA Propylene glycol methyl ether acetate
- Melamine-formaldehyde resin and optional additives.
- the optional additive may be, for example, a pigment for imparting color to the fourth paint, a preservative for long-term storage of the fourth paint, or the like.
- the polymer resin is 1 to 5% by weight
- the deodorized kerosene is 5 to 10% by weight
- the methyl isobutyl ketone is 5 to 10% by weight
- the n-butyl acetate is 1 to 5% by weight
- the iso Butyl alcohol is 5 to 10% by weight
- the n-butyl alcohol is 5 to 10% by weight
- the talc is 5 to 10% by weight
- the barium sulfate is 1 to 5% by weight
- the urea-melamine copolymer is 20 to 25 %
- the silicone epoxy copolymer is 5 to 10% by weight
- the PGMEA is 10 to 15% by weight
- the melamine-formaldehyde modified resin is 1 to 5% by weight
- the optional additive is 10 to 20% by weight to be.
- the fourth paint composed of the above composition provides excellent corrosion resistance and excellent resistance to salt water to the object for which the coating layer is formed.
- the thickness of the coating layer should be 20 ⁇ m or more. If the thickness of the coating layer is thinner than 20 ⁇ m, it is insufficient to prevent rust or corrosion due to the insufficient thickness, and resistance to salt water is also insufficient. As the thickness of the coating layer becomes thicker, it is effective in preventing rust or corrosion, but when the thickness of the coating layer exceeds 46 ⁇ m, the effect is saturated and the degree of increase is insufficient. Therefore, the thickness of the coating layer is preferably 20 to 46 ⁇ m.
- the formation of the coating layer may be achieved by a sequential process of application of the coating material and curing.
- the coating material may be applied through various methods such as powder coating, spraying, and dipping.
- a spray electrostatic method may be used.
- the spray electrostatic method refers to a method of coating the entire or partial area in the form of a thin film in a non-contact manner.
- the coating layer may be formed using an acrylic paint such as AC 3000 by a spray electrostatic method, and may have a thickness of approximately 20 ⁇ m or more to secure corrosion resistance of the bending portion.
- the coating layer is sprayed two times toward the left and right by an electrostatic spray method, and then dried at about 180 degrees for 15 minutes or more. Reliability for such a coating layer may be ensured by making the incidence of green rust in the coating layer less than about 5% through a salt spray test.
- an inlet end (141c) is formed at one end of the copper pipes 121 and 141 repeatedly penetrating through the plurality of pins 122 and 142, and an outlet end 121d and 141d at the other end of the copper pipes 121 and 141. ) Is formed.
- the inlet end (141c) refers to a portion of the heat exchange fluid flowing into the heat exchanger (120, 140), and the outlet end (121d, 141d) refers to a portion from which the heat exchange fluid is discharged from the heat exchanger (120, 140).
- the inlet end (141c) is connected to a counterpart disposed on the upstream side of the heat exchanger (120, 140) based on the flow of the refrigerant, and the outlet ends (121d, 141d) are the heat exchanger 120, based on the flow of the refrigerant. 140) and connected to the counterpart disposed on the downstream side.
- the inlet end 141c is connected to the expander 130, and the outlet ends 121d and 141d are connected to a gas-liquid separator or a compressor. .
- the inlet end (141c) and the outlet end (121d, 141d) protrude in the same direction toward the outside of any one of the two end plates (123, 143).
- the inner side of the end plates 123 and 143 refers to the direction in which the plurality of pins 122 and 142 are formed, and the outer side of the end plates 123 and 143 refers to the pin 122, based on the end plates 123 and 143. 142) means a direction opposite to the direction in which it is formed.
- the length of the inlet end (141c) and the outlet end (121d, 141d) protruding from the end plates (123, 143) may be about 12mm.
- the position where the welding part is formed is naturally limited by the protruding length of the inlet end (141c) and the outlet end (121d, 141d) from the end plates (123, 143). For example, if the protruding length D1 of the inlet end 141c and the outlet end 121d and 141d is about 12 mm, the length from the end plates 123 and 143 to the welding part is also about 12 mm.
- connecting pipes 124, 131 and 151 having a length of 40 mm or more and 80 mm or less, respectively, are connected to the inlet end 141c and the outlet end 121d and 141d by welding, and the connecting pipes 124, 131, After forming a coating layer on the heat exchangers 120 and 140 to which 151 is connected, it is proposed to weld the connection pipes 124, 131 and 151 to the counterpart or other pipes again.
- the counterpart means a device such as an expander 130, a gas-liquid separator, a compressor, etc. disposed on the upstream or downstream side of the heat exchangers 120 and 140 in the refrigeration cycle, and the other piping refers to the counterpart and the connection pipe 124 , 131, 151).
- connection pipe (124, 131, 151) One end (131a, 151a) of the connection pipe (124, 131, 151) is connected to the inlet end (141c) or the outlet end (121d, 141d), the other end (131b, 151b) of the connection pipe (124, 131, 151) Is connected to the counterpart or other pipe.
- welding portions are formed at both one end (131a, 151a) and the other end (131b, 151b) of the connection pipe (124, 131, 151).
- connection pipe (124, 131, 151) having a length of 40 mm or more and 80 mm or less is welded to the inlet end (141c) and the outlet end (121d, 141d)
- connection pipes (124, 131, 151) are formed sufficiently far from the end plates (123, 143), so the other ends (131b, 151b) of the connection pipes (124, 131, 151) after the coating layer is formed. ), even if the weld is formed, there is no effect on the previously formed coating layer.
- FIG. 4 is a graph showing a temperature measurement result of a pipe according to a position of a welding part.
- the horizontal axis of the graph indicates the position of the weld, and the position of the weld indicates the distance from the end plate to the portion where the weld is formed. The smaller the position of the welding part is, the closer the welding is to the end plate. Meanwhile, the vertical axis of the graph indicates the temperature.
- the graph drawn with a dotted line indicates the temperature at each location when welding is performed at a location 12 mm from the end plate. Referring to the graph drawn by the dotted line, it can be seen that the temperature decreases as the position of the welding part moves away from the end plate.
- the temperatures indicated by dots indicate the temperature of the end plate when welding is performed at each location.
- the temperature of the end plate corresponds to about 70°C.
- the temperature of the end plate and the return bend on which the coating layer is formed must be 100°C or less. Therefore, according to the result of Fig. 4, if one end of the connecting pipe having a length of about 40 mm or more and 80 mm or less is first welded to the inlet and outlet ends before the coating layer is formed, the coating layer is deteriorated even if the other end of the connecting pipe is welded after the coating layer is formed. Does not occur.
- 5 is a flowchart of a method of manufacturing a home appliance according to an embodiment of the present invention.
- 6 is a conceptual diagram showing a step of forming a coating layer and a step before and after it during the manufacturing process of the home appliance according to the manufacturing method of FIG. 5.
- heat exchangers including copper pipes, fins, and end plates are prepared.
- a straight tube called a hair pin before expansion is inserted into a plurality of pins (S100 in FIG. 4).
- the plurality of pins are arranged in a row or in multiple rows, but have through holes at the same location, so that the hairpins can be inserted into the through holes in one direction.
- the through holes formed in the plurality of pins are larger than the outer diameter of the hair pin.
- a straight tube is formed by performing an expansion process of expanding the outer and inner diameters of the hair pin, and a plurality of pins are coupled to the outer peripheral surface of the straight tube.
- burrs are formed at both ends of the straight tube by performing the above pipe expansion.
- the pipe should be expanded so that the distance between the rim of the burr and the outer surface of the straight tube is 0.4mm to 1.8mm.
- the end plates are arranged one by one on the outermost edge of the plurality of fins, and the return bend is welded to the straight tube to complete the manufacture of the heat exchanger (S300 in FIG. 4).
- connecting pipes 124 and 131 having a length of 40 mm or more are welded to the inlet and outlet ends of the copper pipe (S400 in Fig. 5, b in Fig. 6). .
- one end of the connection pipes 124 and 131 is welded to the inlet end or the outlet end of the copper pipe.
- the coating layer is not affected by the subsequent welding process performed in step S600 to be described later.
- a coating layer is formed on the surface of the return bend, welds formed at both ends of the return bend, and burrs (S500).
- the welded heat exchanger is mounted on the masking jigs Z1 and Z2 (Fig. 6 c and d).
- the masking jigs Z1 and Z2 are formed to surround the rest of the heat exchanger except for both ends of the heat exchanger, and a coating layer cannot be formed on the portions surrounded by the masking jigs Z1 and Z2.
- the masking jig (Z1, Z2) exposes two end plates, a plurality of return bends exposed through the end plates, an inlet end and an outlet end, and a connecting pipe, and wraps the rest.
- the heat exchanger When the heat exchanger is mounted on the masking jig (Z1, Z2), coating is performed (e and f of Fig. 6).
- the first to fourth paints described above may be used for the coating, and the coating layer formed by the paint provides corrosion resistance.
- the formation of the coating layer is performed by a sequential process of applying a coating material (Fig. 6 e) and curing (Fig. 6 f).
- the coating material may be applied by a method such as powder coating, spraying, or dipping. Place the heat exchanger to be coated on a jig capable of rotating the heat exchanger, apply a coating material to one side of the heat exchanger using the above methods, rotate the heat exchanger using a jig, and then again on the other side of the heat exchanger using the above methods. Apply coating material. Curing may be performed by natural drying at room temperature or by heat curing.
- a spray electrostatic method refers to a method of coating the entire or partial area in the form of a thin film in a non-contact manner.
- the coating layer is a method of spraying an acrylic paint such as AC 3000 by a spray electrostatic method.
- the coating layer may have a thickness of about 20 ⁇ m or more.
- the coating layer is sprayed two times toward the left and right by an electrostatic spray method, and then dried at about 180 degrees for 15 minutes or more. Reliability for such a coating layer may be ensured by making the incidence of green rust in the coating layer less than about 5% through a salt spray test.
- the counterpart is welded to the other end of the connecting pipe to be connected (S600 of FIG. 5, g of FIG. 6).
- the counterpart refers to a pipe connected to the filter dryer 125, a pipe connected to the expander 130, and the like.
- a process of mounting the heat exchanger and the counterpart to the base of the home appliance to be manufactured may be added between the detachment of the masking jig and the welding of the counterpart.
- the base of the home appliance refers to an object that accommodates or supports a heat exchanger and a counterpart.
- one end of the connecting pipe is first welded to the inlet end and the outlet end of the heat exchanger, and the other end of the connecting pipe is post-welded to the counterpart after forming the coating layer.
- One end of the connection pipe is close to the end plate, while the other end of the connection pipe is located far from the end plate, so that the coating layer may not be affected by the heat of post-welding.
- FIG. 7 is a perspective view of a clothing treatment apparatus for explaining an application example of the heat exchanger proposed in the present invention.
- the cabinet 1010 forms the exterior of the laundry treatment apparatus 1000.
- the cabinet 1010 includes a plurality of sub cabinets constituting at least one of the front, rear, left and right sides, upper and lower surfaces of the laundry treatment apparatus 1000.
- the sub-cabinet may be composed of a metal plate or may be composed of a synthetic resin material.
- the sub-cabinet forming the base of the laundry treatment apparatus 1000 may be referred to as a base cabinet 1310.
- the base cabinet 1310 is formed of a synthetic resin material to provide a space in which various parts are mounted.
- the base cabinet 1310 may itself form a bottom surface of the laundry treatment apparatus 1000, or a base plate formed of a metal material may be mounted under the base cabinet 1310 and placed on the floor.
- a clothing inlet is formed in the front portion of the cabinet 1010.
- the clothes inlet port communicates with the front opening of the drum 1030 and is configured to insert a treatment object such as clothes or bedding into the drum 1030.
- the door 1020 is formed to open and close the clothes inlet.
- the door 1020 may be rotatably connected to the cabinet 1010 by a hinge 1021.
- the door 1020 may include a light transmitting part. Accordingly, even when the door 1020 is closed, the inside of the drum 1030 may be visually exposed through the light transmitting part.
- the drum 1030 is rotatably installed inside the cabinet 1010.
- the drum 1030 is formed in a cylindrical shape with an empty inside open to the front and the rear, and the front opening of the drum 1030 communicates with the clothes inlet, and is configured to accommodate the object to be treated inside the drum 1030. .
- Heat pump cycle devices 1100 are disposed under the drum 1030.
- the lower side of the drum 1030 refers to a space between the lower portion of the drum 1030 and the base cabinet 1310.
- the heat pump cycle devices 1100 refer to devices configuring a cycle to sequentially evaporate-compress-condensate-expand the refrigerant. When the heat pump cycle devices 1100 are operated, high temperature drying is performed while sequentially exchanging heat with the heat exchanger of the heat pump cycle devices 1100.
- the base cover 1320 is formed to cover the base cabinet 1310. When the base cabinet 1310 and the base cover 1320 are combined, the inlet and the outlet form a closed circulation passage. The upstream of this circulation passage is connected to the front duct connector 1210. And the downstream of the circulation flow path is connected to the rear duct connector 1220.
- the front duct connector 1210 is configured to be connected to the front opening of the drum 1030, and the rear duct connector 1220 is configured to be connected to the rear opening of the drum 1030.
- the front duct connector 1210 may be referred to as an outlet duct in that it forms a flow path through which air inside the drum 1030 is discharged.
- the rear duct connector 1220 may be referred to as an inlet duct in that it forms a flow path through which air is introduced into the drum 1030.
- Drying the object to be treated inside the drum 1030 and the humidified air is guided by the front duct connector 1220 to exchange heat with the heat exchanger of the heat pump cycle devices 1100. Moisture is removed through heat exchange, and the heated air is introduced back into the drum 1030 through the rear duct connector 1220.
- the water tank 1410 is formed to collect condensed water.
- the water tank 1410 is disposed in the upper left or right upper part of the drum 1030.
- the water container 1410 is disposed in the upper left empty space or the upper right empty space between the upper part of the drum 1030 and the cabinet 1010.
- the bucket 1410 is shown to be disposed on the upper left side of the drum 1030.
- the water container cover 1420 is disposed at the upper left or upper right of the front part of the laundry treatment apparatus 1000 so as to correspond to the position of the water container 1410.
- the water container cover 1420 is formed to be grasped by hand, and is exposed to the front surface of the clothing treatment apparatus 1000. When the water container cover 1420 is pulled to empty the condensed water collected in the water container 1410, the water container 1410 is pulled out together with the water container cover 1420.
- An input/output panel 1500 is provided on the front or upper surface of the laundry treatment apparatus 1000.
- the input/output panel 1500 is shown to be disposed next to the bucket cover 1420.
- the input/output panel 1500 may include an input unit 1510 for receiving a selection of a clothing treatment course from a user, and an output unit 1520 for visually displaying an operating state of the clothing treatment apparatus 1000.
- the input unit 1510 may be formed as a jog dial, but is not limited thereto.
- the output unit 1520 may be formed to visually display an operating state of the clothing treatment apparatus 1000.
- the clothing processing apparatus 1000 may have a separate component for an audible display in addition to the visual display.
- the controller 1600 is formed to control the operation of the clothing processing apparatus 1000 based on a user's input applied through the input unit 1510.
- the controller 1600 may include a circuit board and elements mounted on the circuit board.
- the controller 1600 controls the operation of the clothing treatment apparatus 1000 according to a preset algorithm.
- FIG. 8 is a conceptual diagram illustrating circulation of air through the drum and circulation passage shown in FIG. 7.
- the left side corresponds to the front (F) of the drum 1030
- the right side corresponds to the rear (R) of the drum 1030.
- the circulation passage 1200 is formed by a front duct connector 1210, a rear duct connector 1220, and a connection duct 1230 disposed between the front duct connector 1210 and the rear duct connector 1220.
- Each of the front duct connector 1210, the rear duct connector 1220, and the connection duct 1230 may be formed by combining a plurality of members.
- the drum 1030, the front duct connector 1210, the connection duct 1230, and the rear duct connector 1220 are sequentially connected, and the rear duct connector 1220 is again connected to the drum 1030.
- the rear duct connector 1220 is again connected to the drum 1030.
- the front supporter 1040 has an opening corresponding to the front opening 1030 ′ of the drum for inputting the object to be treated, and a communication hole communicating with the front duct connector 1210 is formed on the lower side.
- the front duct connector 1210 extends downward from the front supporter 1040 to the connection duct 1230. Air dried on the object to be treated in the drum 1030 is recovered to the connection duct 1230 through the front duct connector 1210.
- connection duct 1230 An evaporator 1140 and a condenser 1120 among the heat pump cycle devices 1100 are installed inside the connection duct 1230.
- a circulation fan 1710 for supplying hot dry air to the rear duct connector 1220 is also installed inside the connection duct 1230.
- the evaporator 1140 is disposed on the upstream side of the condenser 1120 based on the flow of air, and the circulation fan 1710 is disposed on the downstream side of the condenser 1120.
- the circulation fan 1710 generates wind in a direction that sucks air from the condenser 1120 and supplies it to the inlet duct 1220.
- the rear duct connector 1220 extends upward from the connection duct 1230 and is disposed to cover the rear surface of the rear supporter 1050, and communicates with a vent formed in the rear supporter 1050.
- the rear surface of the rear supporter 1050 refers to a surface facing the rear of the laundry treatment apparatus 1000.
- the hot dry air is supplied into the drum 1030 through a vent.
- the rear duct connector 1220 is located at the rear of the drum 1030 from the connection duct 1230 disposed under the drum 1030. Extends upward toward.
- the inlet duct 1220 may also extend in the vertical direction, but the length of the rear duct connector 1220 in the vertical direction is longer than that of the front duct connector 1210 due to the connection structure.
- FIG. 9 is a plan view of the base cabinet shown in FIG. 7 and heat pump cycle devices mounted on the base cabinet.
- a base cabinet 1310 is disposed under the drum 1030 to provide a space in which various components including the heat pump cycle devices 1100 are mounted.
- the base cabinet 1310 includes a drum motor mounting part 1314, a compressor mounting part 1315, a base flow path part 1310 ′, and a condensed water recovery part 1316.
- the drum motor mounting portion 1314 and the compressor mounting portion 1315 are disposed on one side of the base passage portion 1310'. In this embodiment, it is shown that the drum motor mounting portion 1314 and the compressor mounting portion 1315 are disposed at the left front and rear sides of the base flow passage 1310', respectively.
- a drum motor (not shown) that generates a driving force for rotation of the drum 1030 is mounted on the drum motor mounting portion 1314.
- a belt (not shown) for transmitting the driving force of the drum motor 1800 to the drum 1030 may be connected to the drum motor 1800.
- the belt is disposed to surround the outer periphery of the drum 1030.
- a compressor 1110 formed to compress the refrigerant is mounted on the compressor mounting part 1315.
- the compressor 1110 is an element constituting the heat pump cycle devices 1100, but does not directly heat exchange with air, and thus does not need to be installed in the base flow path 1310'. Rather, if the compressor 1110 is installed in the base flow path 1310 ′, it may interfere with the flow of air. Therefore, the compressor 1110 is preferably installed outside the base flow path 1310 ′.
- the refrigerant is evaporated (liquid -> vapor) while absorbing heat in the evaporator 1140, and is sucked into the compressor 1110 in a low-temperature, low-pressure gaseous state.
- a gas-liquid separator 1150 is installed on the upstream side of the compressor 1110 based on the flow of the refrigerant. The gas-liquid separator 1150 separates the refrigerant flowing into the compressor 1110 into a gas phase and a liquid phase, so that only the gaseous refrigerant flows into the compressor 1110. Accordingly, a problem in which a liquid refrigerant flows into the compressor 1110 and causes a malfunction or a decrease in efficiency can be prevented.
- the compressor mounting portion 1315 is provided with fixing ribs 1315' for fixing the compressor 1110 at at least three locations.
- the fixed rib 1315 ′ may extend through the compressor mounting portion 1315 and extend toward the rear surface.
- the fixing rib 1315' extending to the rear surface is configured not to touch the bottom surface.
- the base passage part 1310 ′ forms a part of the circulation passage 1200. Based on the flow of air, the base flow path part 1310' is divided into a guide part 1311, a heat exchange part 1312, and a circulation fan receiving part 1313. An evaporator 1140 and a condenser 1120 are disposed in the heat exchange part 1312, and a circulation fan (not shown) is disposed in the circulation fan receiving part 1313 to face the condenser 1120.
- the guide portion 1311 corresponds to a portion into which air discharged from the front opening of the drum 1030 is introduced.
- the guide part 1311 is formed with an opening that is open upward, and the opening communicates with the front duct connector 1210. Air flowing downward through the front duct connector 1210 is switched from the guide part 1311 to the rear of the base cabinet 1310 and flows into the heat exchange part 1312.
- the heat exchange unit 1312 corresponds to a portion in which an evaporator 1140 for removing moisture from air introduced from the guide unit 1311 and a condenser 1120 for heating the moisture removed air are installed.
- the heat exchange part 1312 may extend in a straight line from the front to the rear of the base cabinet 1310.
- the refrigerant compressed by the compressor 1110 is in a high temperature and high pressure state and flows to the condenser 1120 through the pipe 1115.
- the condenser 1120 the refrigerant is liquefied while releasing heat.
- the liquefied high-pressure refrigerant flows into the filter dryer 1125 through a pipe 1122 and is filtered through the filter dryer 1125. Subsequently, the refrigerant is depressurized in the expander 1130.
- the low temperature and low pressure liquid refrigerant flows into the evaporator 1140.
- the refrigerant evaporated in the evaporator 1140 is circulated to the compressor 1110 through the gas-liquid separator 1150.
- connection pipes 1141 and 1142 respectively. It has been previously described that the distance from the end plate of the evaporator 1140 to the welding part may be separated by the connection pipes 1141 and 1142.
- the circulation fan accommodating portion 1313 corresponds to a portion accommodating a circulation fan that sucks and blows air that has passed through the heat exchanger 1312.
- the circulation fan is composed of a sirocco fan that blows air in front, that is, heated air through the condenser 1120 to the side.
- the hot dry air that has passed through the condenser 1120 is supplied to the drum 1030 through the rear duct connector 1220.
- the high-temperature dry air supplied to the drum 1030 evaporates the moisture of the object to be treated and becomes hot and humid air.
- the hot and humid air is recovered through the front duct connector 1210, and heat exchanged with the refrigerant in the evaporator 1140 to become low-temperature air.
- the low-temperature dry air exchanges heat with the refrigerant in the condenser 1120 to become high-temperature dry air and is supplied to the drum 1030 again.
- the evaporator 1140 and the condenser 1120 mounted on the base passage part 1310 ′ are positioned eccentrically toward one side from the center of the base cabinet 1310. That is, in the base flow path part 1310 ′, the flow path after the guide part 1311 extends backward from a position eccentric from the center of the base cabinet 1310 to one side.
- a condensed water recovery part 1316 is provided between the base flow path part 1310 ′ and the compressor mounting part 1315.
- the condensed water recovery unit 1316 communicates with the base flow path 1310' to form a space in which condensed water generated in the evaporator 1140 is recovered.
- the condensed water recovery unit 1316 is configured to communicate with the heat exchange unit 1312.
- a water pump (not shown) is installed in the condensed water recovery unit 1316.
- the water pump is configured to transfer the condensed water collected by the condensed water recovery unit 1316 to the water container 1410 (see FIG. 7 ).
- the condensed water transferred to the water tank 1410 may be transferred by a water pump and used for cleaning the evaporator 1140.
- the condensed water recovery part 1316 may be formed to protrude from one surface of the base cabinet 1310 in the form of a partition wall, or may be formed in a form recessed from one surface of the base cabinet 1310 as in the present embodiment.
- a communication hole 1316 ′ communicating the heat exchange unit 1312 and the condensed water recovery unit 1316 may be formed at a rear end of one side of the condenser 1120.
- the condensed water generated in the evaporator 1140 falls to the bottom surface of the heat exchange unit 1312 and flows into the condensed water recovery unit 1316 through a communication hole 1316'.
- the heat exchange part 1312 may be formed to be inclined toward the communication hole 1316 ′ so that the condensed water can be moved to the communication hole 1316 ′ by gravity.
- the clothing treatment apparatus 1000 corresponds to an example of a home appliance to which the heat exchanger proposed in the present invention is applied.
- the heat exchanger proposed in the present invention can be applied to all home appliances to which a refrigeration cycle or a heat pump cycle is applied.
- the heat exchanger described above and the home appliance including the heat exchanger are not limited to the configuration and method of the above-described embodiments, but the embodiments are all or part of each embodiment selectively so that various modifications can be made. It may be configured in combination.
- the present invention can be variously implemented or applied in the field of home appliances including heat exchangers.
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Abstract
Description
Claims (44)
- 외관을 형성하는 캐비닛;상기 캐비닛에 구비되고 내부에 의류가 수용되는 드럼; 및상기 드럼에 수용된 의류의 습기를 제거 하거나 열풍을 생성하는 열교환기를 포함하며,상기 열교환기는,냉매의 순환 유로를 형성하는 구리 파이프; 및일 방향을 따라 서로 이격된 위치에 배열되며, 상기 구리 파이프의 외주면에 결합되는 복수의 핀(fin)을 포함하고,상기 구리 파이프는,상기 복수의 핀의 배열 방향을 따라 연장되는 복수의 스트레이트 튜브(straight tube); 및용접에 의해 상기 복수의 스트레이트 튜브 중 어느 하나의 일단과 다른 스트레이트 튜브의 일단에 연결되는 복수의 리턴 벤드(return bend)를 포함하고,상기 복수의 스트레이트 튜브의 양 단에는 확관에 의해 각 스트레이트 튜브의 외경보다 큰 둘레를 갖는 버(burr)가 형성되며,상기 버의 테두리와 상기 스트레이트 튜브의 외면 사이의 거리는 0.4mm 내지 1.8mm이고,상기 복수의 리턴 벤드의 표면, 각 리턴 벤드의 양 단에 형성되는 용접부의 표면, 그리고 상기 버의 표면에는 내식성을 제공하는 코팅층이 형성되는 것을 특징으로 하는 의류 건조기.
- 제1항에 있어서,상기 버의 직경은 10mm 내지 12mm인 것을 특징으로 하는 의류 건조기.
- 제1항에 있어서,상기 열교환기는 냉매가 증발하여 상기 드럼 내부에 수용된 의류의 습기를 제거하는 증발기로 이루어지며,상기 버의 직경은 10mm 내지 12mm인 것을 특징으로 하는 의류 건조기.
- 제1항에 있어서,상기 열교환기는 냉매가 증발하여 상기 드럼 내부에 수용된 의류의 습기를 제거하는 응축기로 이루어지며,상기 버의 직경은 10mm 내지 12mm인 것을 특징으로 하는 의류 건조기.
- 제1항에 있어서,상기 코팅층의 두께는 20㎛ 내지 60㎛ 인 것을 특징으로 하는 의류 건조기.
- 제1항에 있어서,상기 열교환기는 상기 복수의 핀을 사이에 두고 서로 이격된 위치에 배치되는 두 엔드 플레이트(end plate)를 더 포함하고,상기 구리 파이프의 입구단과 출구단은 상기 두 엔드 플레이트 중 어느 하나의 외측을 향해 같은 방향으로 돌출되고,상기 입구단과 상기 출구단에는 각각 40mm 이상 80mm 이하의 길이를 갖는 연결 배관이 연결되며, 상기 연결 배관의 양 단에는 용접부가 형성되는 것을 특징으로 하는 의류건조기.
- 제6항에 있어서,상기 엔드플레이트의 일 면에는, 상기 리턴벤드와 함께 코팅층이 형성되는 것을 특징으로 하는 의류건조기.
- 제6항에 있어서,상기 엔드플레이트는, 용융된 아연 도금 강판으로 형성되는 것을 특징으로 하는 의류건조기.
- 제1항에 있어서,상기 코팅층은 폴리우레탄 수지(polyurethane resin), 자일렌(Xylene), 다이메틸 카보네이트(Dimethyl carbonate), 및 에틸벤젠(Ethylbenzene)을 함유하는 도료에 의해 형성되는 것을 특징으로 하는 의류건조기.
- 제9항에 있어서,상기 도료에서 상기 폴리우레탄 수지는 33.2 내지 40 중량%, 상기 자일렌은 30 내지 31.7 중량%, 상기 다이메틸 카보네이트는 23.2 내지 30 중량%, 상기 에틸벤젠은 1 내지 5.1 중량%인 것을 특징으로 하는 의류건조기.
- 제1항에 있어서,상기 코팅층은 부틸셀로솔브(Butyl cellosolve), 이소부틸알코올(isobutyl alcohol), n-부틸알코올(n-Butyl Alcohol), 비스페놀 A 디글리시딜에테르(Bisphenol A diglycidyl ether), 에틸벤젠(ethylbenzene), 아크릴산(acrylic acid) 혼합 폴리머, 자일렌(Xylene) 그리고 멜라민 수지(melamine resin)를 함유하는 도료에 의해 형성되는 것을 특징으로 하는 의류건조기.
- 제6항에 있어서,상기 아크릴산 혼합 폴리머는 스티렌(Styrene), n-부틸 메타크릴레이트 (butyl methacrylate), 2-에틸헥실아크릴산 (2-Ethylhexylacrylate), 그리고 2-하이드록시에틸 아크릴산(2-hydroxyethyl acrylate)을 함유하는 것을 특징으로 하는 의류건조기.
- 제11항에 있어서,상기 도료에서 상기 부틸셀로솔브는 1 내지 10 중량%, 상기 이소부틸알코올은 1 내지 10 중량%, 상기 n-부틸알코올은 5 내지 15 중량%, 상기 비스페놀 A 디글리시딜에테르는 1 내지 10 중량%, 상기 에틸벤젠은 15 내지 25 중량%, 상기 아크릴산 혼합 폴리머는 28 내지 38 중량%, 상기 자일렌은 15 내지 25 중량%, 상기 멜라민 수지는 5 내지 15 중량%인 것을 특징으로 하는 의류건조기.
- 제1항에 있어서,상기 코팅층은 고분자 수지(polymeric resin), 탈취 등유(deodorized kerosene), 메틸 이소부틸 케톤(methyl isobutyl ketone), n-아세트산부틸(n-Butyl Acetate), 이소부틸알코올(isobutyl alcohol), n-부틸알코올(n-Butyl Alcohol), 활석(talc), 황산바륨(barium sulfate), 요소-멜라민 공중합체(Urea-malamine copolymer), 실리콘 에폭시 공중합체(sillicone epoxy copolymer), PGMEA(Propylene glycol methyl ether acetate), 멜라민-포름알데이드 변성 수지(Modified melamine-Formaldehyde resin), 그리고 임의의 첨가제를 함유하는 도료에 의해 형성되는 것을 특징으로 하는 의류건조기.
- 제14항에 있어서,상기 도료에서 상기 고분자 수지는 1 내지 5 중량%, 상기 탈취 등유는 5 내지 10 중량%, 상기 메틸 이소부틸 케톤은 5 내지 10 중량%, 상기 n-아세트산부틸은 1 내지 5 중량%, 상기 이소부틸알코올은 5 내지 10 중량%, 상기 n-부틸알코올은 5 내지 10 중량%, 상기 활석은 5 내지 10 중량%, 상기 황산바륨은 1 내지 5 중량%, 상기 요소-멜라민 공중합체는 20 내지 25 중량%, 상기 실리콘 에폭시 공중합체는 5 내지 10 중량%, 상기 PGMEA는 10 내지 15 중량%, 상기 멜라민-포름알데이드 변성 수지는 1 내지 5 중량%, 그리고 상기 임의의 첨가제는 10 내지 20 중량%인 것을 특징으로 하는 의류건조기.
- 열교환기를 포함하는 의류건조기의 제조방법에 있어서,상기 열교환기는, 복수의 스트레이트 튜브와 복수의 리턴 벤드를 포함하는 구리 파이프, 및 상기 구리 파이프의 외주면에 결합되는 복수의 핀을 포함하고,상기 제조방법은,일 방향을 따라 상기 복수의 핀을 서로 이격된 위치에 배열하고, 상기 복수의 핀에 형성되는 관통홀마다 상기 스트레이트 튜브를 하나씩 삽입하는 단계;상기 복수의 스트레이트 튜브를 확관하여 각 스트레이트 튜브의 외주면에 상기 복수의 핀을 결합되게 함과 아울러 상기 스트레이트 튜브의 양 단에 각 스트레이트 튜브의 외경보다 큰 둘레의 버(burr)를 형성하는 단계;상기 리턴 벤드의 양단을 각각 상기 복수의 스트레이트 튜브 중 어느 하나의 일단과 다른 스트레이트 튜브의 일단에 용접하는 단계; 및상기 리턴 벤드의 표면, 상기 리턴 벤드의 양단에 형성되는 용접부의 표면, 그리고 상기 버의 표면에 내식성을 제공하는 코팅층을 형성하는 단계를 포함하고,상기 버를 형성하는 단계에서는 상기 버의 테두리와 상기 스트레이트 튜브의 외면 사이의 거리가 0.4mm 내지 1.8mm가 되도록 확관을 실시하는 의류건조기의 제조방법.
- 제16항에 있어서,상기 열교환기는 상기 복수의 핀을 사이에 두고 서로 이격된 위치에 배치되는 두 엔드 플레이트를 더 포함하고,상기 의류건조기의 제조방법은,상기 용접하는 단계와 상기 코팅층을 형성하는 단계 사이에, 상기 두 엔드 플레이트 중 어느 하나의 외측을 향해 같은 방향으로 돌출되는 상기 구리 파이프의 입구단과 출구단에 각각 40mm 이상 80mm 이하 길이를 갖는 연결 배관의 일단을 용접하는 단계; 및상기 코팅층을 형성하는 단계 이후에 상기 연결 배관의 타 단을 상대물과 용접하는 단계를 더 포함하는 의류건조기의 제조방법.
- 외관을 형성하는 캐비닛;상기 캐비닛에 구비되고, 내부에 의류가 수용되는 드럼; 및상기 드럼에 수용된 의류의 습기를 제거 하거나 열풍을 생성하는 열교환기를 포함하며,상기 열교환기는,냉매의 순환 유로를 형성하는 구리 파이프;일 방향을 따라 서로 이격된 위치에 배열되며, 상기 구리 파이프의 외주면에 결합되는 복수의 핀(fin); 및상기 복수의 핀을 사이에 두고, 서로 이격된 위치에 배치되는 두 엔드 플레이트(end plate)를 포함하고,상기 구리 파이프는,상기 복수의 핀의 배열 방향을 따라 연장되는 복수의 스트레이트 튜브(straight tube); 및용접에 의해 상기 복수의 스트레이트 튜브 중 어느 하나의 일단과 다른 스트레이트 튜브의 일단에 연결되는 복수의 리턴 벤드(return bend)를 포함하고,상기 엔드플레이트의 일 면과 상기 일면에 위치되는 리턴 벤드에는 녹방지를 위해 코팅층이 형성되는 것을 특징으로 하는 의류건조기.
- 제18항에 있어서,상기 구리 파이프의 입구단과 출구단 중 적어도 한 곳에는 양단에 용접부가 형성되는 연결배관이 설치되는 것을 특징으로 하는 의류건조기.
- 제19항에 있어서,상기 연결배관은, 40mm 이상 80mm 이하의 길이를 가지도록 이루어지는 것을 특징으로 하는 의류건조기.
- 제20항에 있어서,상기 연결배관에는 일단으로부터 16mm 이격된 위치로부터 48mm 이격된 위치까지 코팅층이 형성되는 것을 특징으로 하는 의류건조기.
- 제19항에 있어서,상기 열교환기는 냉매가 증발하여 상기 드럼 내부에 수용된 의류의 습기를 제거하는 증발기로 이루어지며,상기 입구단에는, 상기 증발기와 팽창밸브를 용접하여 연결하기 위한 증발기 입구 연결배관이 설치되는 것을 특징으로 하는 의류건조기.
- 제22항에 있어서,상기 증발기 입구 연결배관은, 40mm 이상 80mm 이하의 길이를 가지도록 이루어지는 것을 특징으로 하는 의류건조기,
- 제23항에 있어서,상기 증발기 입구 연결배관에는, 일단으로부터 16mm 이격된 위치로부터 48mm 이격된 위치까지 코팅층이 형성되는 것을 특징으로 하는 의류건조기.
- 제19항에 있어서,상기 열교환기는 냉매가 증발하여 상기 드럼 내부에 수용된 의류의 습기를 제거하는 증발기로 이루어지며,상기 출구단에는, 상기 증발기와 압축기를 용접하여 연결하기 위한 증발기 출구 연결배관이 설치되는 것을 특징으로 하는 의류건조기.
- 제25항에 있어서,상기 증발기 출구 연결배관은, 40mm 이상 80mm 이하의 길이를 가지도록 이루어지는 것을 특징으로 하는 의류건조기,
- 제26항에 있어서,상기 증발기 입구 연결배관에는, 일단으로부터 16mm 이격된 위치로부터 48mm 이격된 위치까지 코팅층이 형성되는 것을 특징으로 하는 의류건조기.
- 제19항에 있어서,상기 열교환기는 냉매가 응축되어, 상기 드럼 내부에 수용된 의류에 열풍을 공급하는 응축기로 이루어지며,상기 입구단에는, 상기 응축기와와 압축기를 용접하여 연결하기 위한 응축기 입구 연결배관이 설치되는 것을 특징으로 하는 의류건조기.
- 제28항에 있어서,상기 응축기 입구 연결배관은, 40mm 이상 80mm 이하의 길이를 가지도록 이루어지는 것을 특징으로 하는 의류건조기.
- 제29항에 있어서,상기 응축기 입구 연결배관에는, 일단으로부터 16mm 이격된 위치로부터 48mm 이격된 위치까지 코팅층이 형성되는 것을 특징으로 하는 의류건조기.
- 제19항에 있어서,상기 열교환기는 냉매가 응축되어, 상기 드럼 내부에 수용된 의류에 열풍을 공급하는 응축기로 이루어지며,상기 출구단에는, 상기 응축기와와 팽창밸브를 용접하여 연결하기 위한 응축기 출구 연결배관이 설치되는 것을 특징으로 하는 의류건조기.
- 제31항에 있어서,상기 응축기 출구 연결배관은, 40mm 이상 80mm 이하의 길이를 가지도록 이루어지는 것을 특징으로 하는 의류건조기,
- 제31항에 있어서,상기 응축기 출구 연결배관에는, 일단으로부터 16mm 이격된 위치로부터 48mm 이격된 위치까지 코팅층이 형성되는 것을 특징으로 하는 의류건조기.
- 제18항에 있어서,상기 코팅층은 폴리우레탄 수지(polyurethane resin), 자일렌(Xylene), 다이메틸 카보네이트(Dimethyl carbonate), 및 에틸벤젠(Ethylbenzene)을 함유하는 도료에 의해 형성되는 것을 특징으로 하는 의류건조기.
- 제34항에 있어서,상기 도료에서 상기 폴리우레탄 수지는 33.2 내지 40 중량%, 상기 자일렌은 30 내지 31.7 중량%, 상기 다이메틸 카보네이트는 23.2 내지 30 중량%, 상기 에틸벤젠은 1 내지 5.1 중량%인 것을 특징으로 하는 의류건조기.
- 제18항에 있어서,상기 코팅층은 부틸셀로솔브(Butyl cellosolve), 이소부틸알코올(isobutyl alcohol), n-부틸알코올(n-Butyl Alcohol), 비스페놀 A 디글리시딜에테르(Bisphenol A diglycidyl ether), 에틸벤젠(ethylbenzene), 아크릴산(acrylic acid) 혼합 폴리머, 자일렌(Xylene) 그리고 멜라민 수지(melamine resin)를 함유하는 도료에 의해 형성되는 것을 특징으로 하는 의류건조기.
- 제36항에 있어서,상기 아크릴산 혼합 폴리머는 스티렌(Styrene), n-부틸 메타크릴레이트 (butyl methacrylate), 2-에틸헥실아크릴산 (2-Ethylhexylacrylate), 그리고 2-하이드록시에틸 아크릴산(2-hydroxyethyl acrylate)을 함유하는 것을 특징으로 하는 의류건조기.
- 제36항에 있어서,상기 도료에서 상기 부틸셀로솔브는 1 내지 10 중량%, 상기 이소부틸알코올은 1 내지 10 중량%, 상기 n-부틸알코올은 5 내지 15 중량%, 상기 비스페놀 A 디글리시딜에테르는 1 내지 10 중량%, 상기 에틸벤젠은 15 내지 25 중량%, 상기 아크릴산 혼합 폴리머는 28 내지 38 중량%, 상기 자일렌은 15 내지 25 중량%, 상기 멜라민 수지는 5 내지 15 중량%인 것을 특징으로 하는 의류건조기.
- 제18항에 있어서,상기 코팅층은 고분자 수지(polymeric resin), 탈취 등유(deodorized kerosene), 메틸 이소부틸 케톤(methyl isobutyl ketone), n-아세트산부틸(n-Butyl Acetate), 이소부틸알코올(isobutyl alcohol), n-부틸알코올(n-Butyl Alcohol), 활석(talc), 황산바륨(barium sulfate), 요소-멜라민 공중합체(Urea-malamine copolymer), 실리콘 에폭시 공중합체(sillicone epoxy copolymer), PGMEA(Propylene glycol methyl ether acetate), 멜라민-포름알데이드 변성 수지(Modified melamine-Formaldehyde resin), 그리고 임의의 첨가제를 함유하는 도료에 의해 형성되는 것을 특징으로 하는 의류건조기.
- 제39항에 있어서,상기 도료에서 상기 고분자 수지는 1 내지 5 중량%, 상기 탈취 등유는 5 내지 10 중량%, 상기 메틸 이소부틸 케톤은 5 내지 10 중량%, 상기 n-아세트산부틸은 1 내지 5 중량%, 상기 이소부틸알코올은 5 내지 10 중량%, 상기 n-부틸알코올은 5 내지 10 중량%, 상기 활석은 5 내지 10 중량%, 상기 황산바륨은 1 내지 5 중량%, 상기 요소-멜라민 공중합체는 20 내지 25 중량%, 상기 실리콘 에폭시 공중합체는 5 내지 10 중량%, 상기 PGMEA는 10 내지 15 중량%, 상기 멜라민-포름알데이드 변성 수지는 1 내지 5 중량%, 그리고 상기 임의의 첨가제는 10 내지 20 중량%인 것을 특징으로 하는 의류건조기.
- 제18항에 있어서,상기 엔드플레이트는, 용융된 아연 도금 강판으로 형성되는 것을 특징으로 하는 의류건조기.
- 제19항에 있어서,상기 엔드플레이트에서 연결배관까지는 60mm 내지 90mm의 길이를 가지도록 이루어지는 것을 특징으로 하는 의류건조기.
- 제42항에 있어서,상기 엔드플레이트로부터 연결배관을 따라 28mm 내지 58mm의 길이를 갖는 코팅층이 형성되는 것을 특징으로 하는 의류건조기.
- 제42항에 있어서,상기 코팅층의 두께는 20㎛ 내지 60㎛ 인 것을 특징으로 하는 의류건조기.
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CN202310736465.2A CN116949777A (zh) | 2019-08-14 | 2020-07-22 | 衣物烘干机 |
CN202080056978.3A CN114270127B (zh) | 2019-08-14 | 2020-07-22 | 热交换器以及包括所述热交换器的家电产品的制造方法 |
AU2020329019A AU2020329019A1 (en) | 2019-08-14 | 2020-07-22 | Heat exchanger and method for manufacturing home appliance including heat exchanger |
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US20240151473A1 (en) * | 2021-03-11 | 2024-05-09 | Hewlett-Packard Development Company, L.P. | Heat exchange and flame arrest |
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US20210047774A1 (en) | 2021-02-18 |
US20240150955A1 (en) | 2024-05-09 |
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CN114270127B (zh) | 2023-07-07 |
EP4293306A2 (en) | 2023-12-20 |
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US11913163B2 (en) | 2024-02-27 |
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EP3795739A3 (en) | 2021-04-07 |
AU2020329019A1 (en) | 2022-04-07 |
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