EP2199693A1 - Échangeur thermique et appareil d'alimentation en eau chaude doté de celui-ci - Google Patents

Échangeur thermique et appareil d'alimentation en eau chaude doté de celui-ci Download PDF

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Publication number
EP2199693A1
EP2199693A1 EP09178235A EP09178235A EP2199693A1 EP 2199693 A1 EP2199693 A1 EP 2199693A1 EP 09178235 A EP09178235 A EP 09178235A EP 09178235 A EP09178235 A EP 09178235A EP 2199693 A1 EP2199693 A1 EP 2199693A1
Authority
EP
European Patent Office
Prior art keywords
hot water
pipe
heat exchanger
pipes
outer pipe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP09178235A
Other languages
German (de)
English (en)
Inventor
Yasushi Murakoshi
Hirotaka Kado
Yusuke Hiji
Akihiko Ishibashi
Tetsuro Hosogi
Takashi Shirai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kobelco and Materials Copper Tube Ltd
Sanden Corp
Original Assignee
Kobelco and Materials Copper Tube Ltd
Sanden Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kobelco and Materials Copper Tube Ltd, Sanden Corp filed Critical Kobelco and Materials Copper Tube Ltd
Publication of EP2199693A1 publication Critical patent/EP2199693A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/02—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled
    • F28D7/022—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled the conduits of two or more media in heat-exchange relationship being helically coiled, the coils having a cylindrical configuration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/0092—Devices for preventing or removing corrosion, slime or scale
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/54—Water heaters for bathtubs or pools; Water heaters for reheating the water in bathtubs or pools
    • 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
    • F28D7/0066—Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids
    • 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
    • F28D7/0066—Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids
    • F28D7/0075—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 same heat exchange medium flowing through sections having different heat exchange capacities or for heating or cooling the same heat exchange medium at different temperatures
    • 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
    • F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
    • 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
    • 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
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/12—Heat pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2220/00—Components of central heating installations excluding heat sources
    • F24D2220/08—Storage tanks

Definitions

  • the present invention relates to, for example, a heat exchanger which is used as a water-heat exchanger of a heat pomp type hot water supply apparatus, and hot water supply apparatus using the heat exchanger.
  • an apparatus (disclosed in JP-A-2006-46877 , for example) is known and that apparatus has a heating unit for heating water, which will be used for supplying hot water, by heat pump circuit, and a tank unit for storing hot water generated by the heating unit, the hot water in the tank unit is supplied to a bus tub and kitchen.
  • the heating unit of the hot water supply apparatus has a refrigerant circuit comprising a compressor, evaporator, water-heat exchanger (gas cooler), and the like.
  • the heating unit heats the water, which will be used for supplying hot water, by water-heat exchanger.
  • the heating unit supplies the hot water to the tank unit through a hot water passage.
  • the water-heat exchange consists of an inner pipe in which the high-temperature refrigerant of the heat pump circuit goes through and an outer pipe housing the inner pipe.
  • the water-heat exchanger is configured to perform heat exchange between the refrigerant and the water, which will be used for supplying hot water, through the inner pipe when the water, which will be used for supplying hot water, flows between the inner and outer pipe.
  • scale consists mainly of calcium carbonate and the like included in the water, which will be used for supplying hot water, usually adheres to the said inner and outer pipe. Also when the refrigerant and the water, which will be used for supplying hot water, flow in the opposite direction with each other, the said scale especially stacks and adheres tightly on the downstream side (high-temperature side) of the water which will be used for supplying hot water. By this, the scale may block the flow of the water which will be used for supplying hot water.
  • An object of the present invention is to provide a heat exchanger and hot water supply apparatus using the same, which can avoid the blocking of flow by means of stacking of scale without forming whole of the outer pipe or the downstream side of the outer pipe using the larger diameter pipe.
  • a heat exchanger of the present invention comprises a heat conductive inner pipe in which a first heat medium flows and an outer pipe in which the inner pipe is disposed, and the heat exchange between the first heat medium and the second heat medium is performed through the inner pipe, and characterized in that the number of the inner pipes which are disposed at a downstream side of the second heat medium is smaller than the number of the inner pipes which are disposed at an upstream side of the second heat medium, at least one of the inner pipe and the outer pipe is made of a copper alloy pipe having a composition comprising 0.005 to 0.2 mass% Zirconium (Zr) and the balance copper (Cu) with inevitable impurities.
  • Zr Zirconium
  • Cu copper
  • the number of the first inner pipes, which are disposed on downstream side of the second heat medium is smaller than the number of the second inner pipes, which are disposed at upstream side of the second heat medium. Therefore, it is secured that the sectional area for flowing water between the outer pipe and inner pipe, which are disposed at downstream side of the second heat medium, become larger than that between the outer pipe and inner pipe, which are disposed at upstream side of the second heat medium. Therefore, for example, even if the scale is piled up at the downstream side of the hot water, which is as the second heat medium, the flowing of the second heat medium may not be blocked.
  • the number of the first inner pipes, which are disposed on upstream side of the second heat medium is larger than the number of the second inner pipes, which are disposed at downstream side of the second heat medium. Therefore, the hot water is heated sufficiently by each of the inner pipes which are disposed at the upstream side.
  • at least one of the inner pipe and the outer pipe is made of a copper alloy pipe having a composition comprising 0.005 to 0.2 mass% Zirconium (Zr) and the balance copper (Cu) with inevitable impurities. Therefore, piling up of the scale between the inner pipe and the outer pipe is prevented.
  • the sectional area for flowing water between the outer pipe and inner pipe, which are disposed at downstream side of the second heat medium is larger than that between the outer pipe and inner pipe, which are disposed at upstream side of the second heat medium. Therefore, it is possible to effectively prevent the blocking of the flow due to the piling up of the scale at the downstream side in the outer pipe, even if whole of the outer pipe or downstream side of the outer pipe is not made of a larger diameter pipe. Therefore, it is possible to increase the productivity without increase in variety or cost of the pipes which is the material for the outer pipes. In this case, since the hot water is heated sufficiently by the inner pipes which are disposed at the upstream side of the second heat medium, an advantage that the heat exchange efficiency is not reduced is achieved. Also, since the piling up of the scales between outer pipe and the inner pipe may be prevented, it is effective for preventing the piling up.
  • Figs. 1 through 6 show an embodiment of the present invention.
  • a heat pump type hot water supply apparatus shown in the Figures include a refrigerant circuit 10 for circulating a refrigerant, a first hot water circuit 20 in which hot water flows, a second hot water circuit 30 in which hot water flows, a bath tub circuit 40 in which a water for bath tub flows, a first water-heat exchanger 50 for performing heat exchange between the refrigerant in the refrigerant circuit 10 and the water for supplying hot water, and a second water-heat exchanger 60 for performing heat exchange between the water for supplying hot water and the water for the bath tab.
  • the first water-heat exchanger performs as a heat exchanger of the present invention.
  • the refrigerant circuit 10 is constructed by connecting a compressor 11, an expander 12, an air-heat exchanger 13, and the water-heat exchanger 50. And the refrigerant circuit 10 circulates the refrigerant in an order of the compressor 11, the first water-heat exchanger 50, the expander 12, the air-heat exchanger 13, and the compressor 11. Also, the refrigerant used in this refrigerant circuit 10 is a natural refrigerant, such as carbon dioxide for example.
  • the first hot water circuit 20 is constructed by connecting a hot water storage tank 21, a first pump 22, and the first water-heat exchanger 50. And the first hot water circuit 20 circulates the hot water in an order of the hot water storage tank 21, the first pump 22, the first water-heat exchanger 50, and the hot water storage tank 21.
  • a water supply pipe 23 and the second hot water circuit 30 is connected to the hot water storage tank 21, and the water for supplying hot water, which is supplied from the water supply pipe 23, flows in the first hot water circuit 20 through the hot water storage tank 21.
  • the hot water storage tank 21 and a bath tub 41 are connected to each other through a passage 25 which is provided with a second pump 24. Also, the water for supplying hot water in the hot water storage tank 21 is supplied to the bath tab 41 by the second pump 24.
  • the second hot water circuit 30 is constructed by connecting the hot water storage tank 21, a third pump 31, and the second water-heat exchanger 60. And the second hot water circuit 30 circulates the hot water in an order of the hot water storage tank 21, the second water-heat exchanger 60, the third pump 31, and the hot water storage tank 21.
  • the bath tub circuit 40 is constructed by connecting the bath tub 41, a forth pump 42, and the second water-heat exchanger 60.
  • the bath tub circuit 40 circulates the water for bath tub in an order of the bath tub 41, the forth pump 42, the second water-heat exchanger 60, and the bath tub 41.
  • the first water-heat exchanger 50 is connected to both of the refrigerant circuit 10 and the first hot water circuit 20, and the first water-heat exchanger 50 performs heat exchange between the refrigerant as a first heat medium which flows in the refrigerant circuit 10 and the hot water as a second heat medium which flows in the first hot water circuit 20.
  • the first water-heat exchanger has first and second inner pipes 51, 52 in which the refrigerant goes through, the first and second inner pipes 51, 52 have heat conductivity, first and second outer pipes 53, 54 housing the first and second inner pipes 51, 52 respectively, a pair of first end headers 55 to which one ends of the first and second inner pipes 51, 52 are connected respectively, a pair of second end headers 56 to which one ends of the outer pipes 53, 54 are connected respectively, a first middle header 57 to which the other ends of the first and second inner pipes 51, 52 are connected, and a second middle header 58 to which the other ends of the first and second outer pipes 53, 54 are connected.
  • the first and second inner pipes 51, 52 and the first and second outer pipes 53, 54 are wound spirally. In this case, two pieces of first inner pipes 51 are disposed in the first outer pipe 53, and four pieces of second inner pipes 52 are disposed in the second outer pipe 54.
  • Each of the first end headers 55 is connected to the refrigerant circuit 10, a refrigerant inflow pipe 55a and an refrigerant outflow pipe 55b are connected to each of the first end headers 55.
  • each of the first inner pipes 51 is connected in parallel with each other to the first end header 55 which is inflow side
  • each of the second inner pipes 52 is connected in parallel with each other to the first end header 55 which is outflow side.
  • Each of the second end header 56 is connected to the first hot water circuit 20, a hot water inflow pipe 56a and a hot water outflow pipe 56b are connected to each of the second end headers 56.
  • each of the second inner pipes 52 is penetrating the second end header 56 which is inflow sides
  • each of the first inner pipes 51 is penetrating the second end header 56 which is outflow side.
  • the first middle header 57 has a pair of header portions 57a and a communication pipe 57b which communicates to each of the header portions 57a.
  • Each of the first inner pipes 51 is connected in parallel with each other to one of the header portions 57a
  • each of the second inner pipes 52 is connected in parallel with each other to another header portion 57a.
  • the first and second inner pipes 51, 52 are connected from the same direction to the first middle header 57.
  • the first and second outer pipes 53, 54 are connected from the same direction to the second middle header 58, and the first and second inner pipes 51, 52 are penetrating the second middle header 58.
  • first inner pipes 51 and the first outer pipe 53 there are a wound portion A1 which is wound from outside to inside and a wound portion A2 which is wound from inside to outside, and the wound portion A1 and the wound portion A2 are arranged at the upper and lower stages with each other.
  • Each of the wound portions A1, A2 is formed so as to communicate with each other by bending the pipes inside the wound portions A1, A2.
  • the second inner pipes 52 and the second outer pipe 54 there are a wound portion A2 which is wound from inside to outside and a wound portion A1 which is wound from outside to inside, and the wound portion A1 and the wound portion A2 are arranged at the upper and lower stage with each other.
  • Each of the wound portions A1, A2 is formed so as to communicate with each other by bending the pipes inside the wound portions A1, A2.
  • the wound portions A1, A2 of the first inner pipes 51 and the first outer pipe 53 are disposed over the wound portions A1, A2 of the second inner pipes 52 and the second outer pipe 54 so that the wound portions A1, A2 are arranged in vertical four stages.
  • the first and second inner pipes 51, 52 are made of copper alloy pipes having a composition comprising, by mass, 0.005 to 0.2 % Zirconium (Zr), 0.05 to 3.0 % Tin (Sn), 0.001 to 0.2 % Phosphorus (P), 0.05 to 5.0 % Zink (Zn), and the balance copper (Cu) with inevitable impurities.
  • the second water-heat exchanger 60 is connected to both of the second hot water circuit 30 and the bath tub circuit 40, and the second water-heat exchanger 60 performs heat exchange between the hot water in the second hot water circuit 30 and the water for bath tub in the bath tub circuit 40.
  • the said hot water supply apparatus has a heating unit 70 which comprises the refrigerant circuit 10 and the first water-heat exchanger 50, and a tank unit 80 which comprises the hot water storage tank 21, the first pump 22, the second pump 24, the second hot water circuit 30, the forth pump 42, and the second water-heat exchanger 60.
  • the heating unit 70 and the tank unit 80 are connected through the first hot water circuit 20.
  • the refrigerant in the refrigerant circuit 10 flows into the each of the first inner pipes 51 through one of the first end headers 55, and after the refrigerant went through each of the first inner pipes 51, the refrigerant flows into each of the second inner pipes 52 through the first middle header 57, and after the refrigerant went through each of the second inner pipes 52, the refrigerant flows out through the other first end header 55.
  • hot water in the hot water circuit 20 flows into the second outer pipe 54 through one of the second end headers 56, and after the hot water went through between the second outer pipe 54 and the each of the second inner pipes 52, the hot water flows into the first outer pipe 53 through the second middle header 58, and after the hot water went through between the fist outer pipe 53 and each of the first inner pipes 51, the hot water flows out through the other second end header 56.
  • the refrigerant and the hot water flow in the opposite direction with each other.
  • the number of the first inner pipes 51, which are disposed on downstream side of the hot water is smaller than the number of the second inner pipes 52, which are disposed on upstream side of the hot water. This is why, it may be secured that the sectional area for flowing water between the first outer pipe 53 and each of the first inner pipes 51 becomes larger than that between the second outer pipe 54 and each of the second inner pipes 52. Therefore, although some scales are piled up on the downstream side of the hot water, flowing of the hot water is not blocked. Also, the number of the second inner pipes 52 on the downstream side of the hot water is larger than that of the first inner pipes 52 on the downstream side of the hot water. Therefore, the hot water is well heated by each of the second inner pipes 52.
  • the first and second inner pipes 51, 52 are made of copper alloy pipes having a composition comprising, by mass, 0.005 to 0.2% Zirconium (Zr), 0.05 to 3.0% Tin (Sn), 0.001 to 0.2% Phosphorus (P), 0.05 to 5.0 % Zink (Zn), and the balance copper (Cu) with inevitable impurities. Therefore, the piling up of the scales to the first and inner pipes 51, 52 may be prevented.
  • the calcium carbonate scale is produced by the reaction as shown in the following formula. Ca(HCO 3 ) 2 ⁇ CO 2 + H 2 O + CaCO 3
  • the speed of this reaction becomes higher when the temperature of the water becomes higher. It is thought that the scale piles up on the cupper pipe because particles of the produced CaCO 3 stick to the wall of the copper pipe, and the particles work as cores, and then the scale grows up. Therefore, if the sticking of the particles of the CaCO 3 is prevented, the piling up of the scale shall be prevented.
  • the surface of the CaCO 3 is charged to the negative polarity.
  • Cu 2 O existing on the surface of the copper is charged to the positive polarity. Therefore, CaCO 3 and Cu 2 O attract each other, and then the CaCO 3 scale sticks to and piles up on the surface of the copper member.
  • the residual carbon is made by adhesion of the remaining lubricating oil for processing onto the surface at the time of the annealing step or the heat treatment step.
  • the method for produce a copper member of which the surface has a predetermined amount or less residual carbon is not limited in this way.
  • a method which performs an annealing process in an inert gas or reducing gas atmosphere including a predetermined amount of oxygen, or other similar heat treatments a method which performs an annealing process in an hydrogen atmosphere, or other similar heat treatments, a method which performs the usual annealing process after oil cleaning by the organic solvent, the oil detergent, or the like, a method which heat members to the annealing temperature in a relatively short time like the induction heating annealing or electric heating annealing, and other similar method may be applicable.
  • the amount of the Zr becomes less than 0.005 mass%, the effect of preventing piling up of the scale is not achieved. Also, if the amount of the Zr becomes larger than 0.2 mass%, mechanical character of the copper alloy member is changed, and wrinkles are easy to occur when the copper alloy member is under the bending process. Also, the amount of the Zr oxide existing on the surface of the copper alloy member becomes large, wettability of brazing filler metal becomes low.
  • Sn provides the member with resistance against the type II pitting corrosion. If the amount of the Sn becomes less than 0.05 mass % , the resistance against the type II pitting corrosion becomes insufficient. If the amount of the Sn becomes larger than 3.0 mass%, mechanical character of the copper alloy member is changed, and wrinkles are easy to occur when the copper alloy member is under the bending process. Also, the amount of the Sn oxide existing on the surface of the copper alloy member becomes large, wettability of brazing filler metal becomes low.
  • P is generally added as a deoxidizer in the melting stage or the casting stage. if the deoxidizing is not necessary, omitting deoxidizer does not change the character of the alloy. However, it is thought that the added P is charged to the negative polarity, this situation can prevent piling up and growing of the scale. Therefore, 0.2 mass% or less of P shall be permitted. If the amount of the P is less than 0.001 mass%, the effect is not expected. Also, if the amount of the P becomes larger than 0.2 mass%, some defects will appear in the casing stage, and the quality of the alloy will not be rectified in the following stages. Also, this result affects the corrosion resistance.
  • Zn provides the copper alloy member of this invention with an excellent workability, although the copper alloy member of this invention has possibility of reduction of the workability by including each of the elements. Especially, it can improve the service life of cutting tools for cutting board members and pipes into a predetermined size. Also, it is expected that the service life of manufacturing tools for forming grooves by form rolling process or rolling process becomes extended. If the amount of the Zn becomes less than 0.05 mass%, the effect becomes insufficient. If the amount of the Zn becomes larger than 0.5 mass % , the increase of the effect becomes flat, and the strength of the member becomes high unnecessarily. Therefore, some troubles will be caused in the plastic working such as bending process.
  • the amount of the Zn becomes larger than 5.0 mass % , the resistance against corrosion may be reduced in water circumstances, and effects regarding the dezincification corrosion and the stress corrosion crack will begin to occur. Also, when the amount of the Zn becomes larger, work hardening becomes easier to occur. Therefore, especially in the case of processing the copper alloy pipe, the number of annealing process become larger than that of phosphorous deoxidized copper. Therefore, the costs for processing may become high. Thus, it is preferable to remain the amount of the Zn at 3.0 mass% or less, in the case the workability is important.
  • the copper alloy pipe which includes 0.03 mass % of Zr, 0.26 mass% of Sn, 0.028 mass% of P, and the balance Cu with inevitable impurities is used.
  • standard material the copper pipe C1220 defined in the JIS H 3300 is used.
  • NaCO 3 concentrated liquid and CaCL 2 concentrated liquid drops a water into tank respectively so that concentrations of Na+ and Ca+ in the water tank become a predetermined level by automatic dropping device.
  • waters of the outlet and the inlet of the gas cooler (the first water-heat exchanger 50 of said embodiment) are sampled, a pressure loss factor is measured, analyzing the concentration of the calcium ion using the capillary electrophoresis device.
  • the pressure loss factor is a calculated amount by calculating pressure loss which changes as time changes compared with the pressure loss at the beginning of the experiment. And the pressure loss at the beginning of the experiment is regarded as 1.
  • this experiment is conducted under a condition in which the room temperature is 25°C, the temperature of the water which flows into the gas cooler is 20°C, the temperature of the water which flows out from the gas cooler is 90°C, the frequency of the compressor is 50Hz, the temperature of the gas which flows out from the compressor is around 110°C (it is caused by adjusting the temperature of the water, which flows out from the gas cooler, to 90°C), the flow rate of the water in the gas cooler is 1.0 L/min. Also, the experiment is conducted, adjusting the temperature of the flow-out gas by opening of the expansion valve manually.
  • the number of the first inner pipes 51, which are disposed on downstream side of the hot water is smaller than the number of the second inner pipes 52, which are disposed on upstream side of the hot water.
  • the sectional area for flowing water between the first outer pipe 53 and each of the inner pipes 51 becomes larger than that between the second outer pipe 54 and each of the second inner pipes 52. Therefore, it is possible to effectively prevent the blocking of the flow due to the piling up of the scale at the downstream side in the outer pipe 53, even if whole of the outer pipes 53, 54 or downstream side of the outer pipe 53 is not made of a larger diameter pipe. Therefore, it is possible to increase the productivity without increase in variety or cost of the pipes which is the material for the outer pipes 53, 54.
  • the number of the second inner pipes 52, which are disposed at upstream side of the hot water is larger than the number of the first inner pipes 51, which are disposed at downstream side of the hot water. Therefore, the hot water is heated sufficiently by each of the second inner pipes 52. Thus, an advantage that the heat exchange efficiency is not reduced is achieved.
  • the first and second inner pipes 51, 52 are made of copper alloy pipes having a composition comprising 0.005 to 0.2 mass% Zr, and the balance copper (Cu) with inevitable impurities.
  • the piling up of the scales between outer pipes 53, 54 and the inner pipes 51, 52 may be prevented. Therefore, it is effective for preventing the piling up.
  • the copper alloy pipes have a composition further including 0.05 to 3.0 mass% Sn is used, it is possible to increase the corrosion resistance.
  • the copper alloy pipes have a composition further including 0.001 to 0.2 mass% P, the resistance for the piling up could be increased.
  • the copper alloy pipes have a composition further including 0.05 to 5.0 mass% Zn, it is possible to improve the workability of the pipes.
  • the first middle header 57 to which the first inner pipes 51 and the first outer pipe 53 are connected from the same direction is provided, and the second middle header 58 to which the first inner pipes 52 and the first outer pipe 54 are connected from the same direction is provided.
  • the passages of the hot water and the refrigerant are curved to the opposite side by each of the middle headers 57, 58.
  • Each inner pipe 51, 52 and each outer pipe 53, 54 do not become long, and it is possible to make whole of the first water-heat exchanger 50 small.
  • each inner pipe 51, 52 and each outer pipe 53, 54 are wound spirally.
  • the wound portion A1 which is wound from outside to inside and the wound portion A2 which is wound from inside to outside are arranged at the upper and lower stages with each other. Adjacent wound portions A1, A2 are formed so as to communicate with each other by bending the pipes inside the wound portions A1, A2. Therefore, each inner pipe 51, 52 and each outer pipe 53, 54, each having long length, could be effectively wound, and it is advantageous to make the water-heat exchanger 50 small.
  • Adjacent wound portions A1, A2 are formed so as to communicate with each other by bending the pipes inside the wound portions A1, A2.
  • the water-heat exchanger 50 is used as a heat exchanger of the present invention, the present invention is applicable to other heat exchangers which are used to conduct heat exchange between a first heat medium and a second heat medium.
  • Fig. 7 through Fig. 9 are showing another embodiment of the present invention. The same elements are shown with the same symbols of the above mentioned embodiment.
  • lower side two stages of the wound portions A1, A2 are formed so as to protrude toward a certain direction by a predetermined length L relative to the other wound portions A1, A2, and the certain direction is perpendicular to the arrangement direction of the wound portions A1, A2.
  • that protruded portion 54a is located under the evaporator 13 of the heating unit 70. If the protruded portion 54a is not located under the evaporator 13, the space under the evaporator 13 becomes a dead space. However, the protruded portion 54a is located under the space.
  • the protruded portion 54a of the first water-heat exchanger 50 is located under the evaporator 13. On the other hand, it is possible to locate the protruded portion 54a under other devices.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
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  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Details Of Fluid Heaters (AREA)
EP09178235A 2008-12-09 2009-12-07 Échangeur thermique et appareil d'alimentation en eau chaude doté de celui-ci Withdrawn EP2199693A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2008313386A JP2010139101A (ja) 2008-12-09 2008-12-09 熱交換器及びこれを用いた給湯装置

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EP2199693A1 true EP2199693A1 (fr) 2010-06-23

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Cited By (1)

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CN114058898A (zh) * 2020-08-07 2022-02-18 LS Metal 株式会社 热导率和断裂强度优异的热交换器用铜合金管及其制法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5602600B2 (ja) * 2010-11-30 2014-10-08 株式会社ティラド 給湯用熱交換器
JP5548957B2 (ja) * 2011-03-02 2014-07-16 パナソニック株式会社 熱交換器およびそれを用いたヒートポンプ給湯機
JP2013002650A (ja) * 2011-06-13 2013-01-07 Panasonic Corp 分流器

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US3392016A (en) * 1965-10-15 1968-07-09 American Metal Climax Inc Copper-zirconium alloy
DE3114297A1 (de) * 1981-04-09 1982-11-04 Fröling GmbH & Co Kessel-Apparatebau, 5063 Overath Koaxial-waermeaustauscher
US20030209345A1 (en) * 2002-05-07 2003-11-13 Zweig Mark Alan Tube-in-tube repairable heat exchanger with cross flow
ES2234398A1 (es) * 2003-04-30 2005-06-16 Valeo Termico, S.A. Intercambiador de calor, en especial de los gases de escape de un motor.
US20050150638A1 (en) * 2000-10-24 2005-07-14 Mitsubishi Heavy Industries Ltd. Condenser for refrigerating machine
JP2005291684A (ja) * 2004-04-06 2005-10-20 Matsushita Electric Ind Co Ltd 熱交換装置及びそれを用いたヒートポンプ給湯装置
JP2008309361A (ja) * 2007-06-12 2008-12-25 Panasonic Corp 冷凍サイクル装置
WO2009125700A1 (fr) * 2008-04-08 2009-10-15 サンデン株式会社 Échangeur de chaleur et dispositif de production d’eau chaude l’utilisant

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JP3922214B2 (ja) * 2003-06-09 2007-05-30 松下電器産業株式会社 熱交換器およびそれを用いたヒートポンプ給湯機
JP4414199B2 (ja) * 2003-11-18 2010-02-10 株式会社ティラド ２重管式熱交換器
JP2005257189A (ja) * 2004-03-12 2005-09-22 Matsushita Electric Ind Co Ltd 熱交換装置及びそれを用いたヒートポンプ給湯装置
JP2007271122A (ja) * 2006-03-30 2007-10-18 Kobelco & Materials Copper Tube Inc 熱交換器
JP5260109B2 (ja) * 2007-03-31 2013-08-14 株式会社コベルコ マテリアル銅管 銅合金部材及び熱交換器

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Publication number Priority date Publication date Assignee Title
US3392016A (en) * 1965-10-15 1968-07-09 American Metal Climax Inc Copper-zirconium alloy
DE3114297A1 (de) * 1981-04-09 1982-11-04 Fröling GmbH & Co Kessel-Apparatebau, 5063 Overath Koaxial-waermeaustauscher
US20050150638A1 (en) * 2000-10-24 2005-07-14 Mitsubishi Heavy Industries Ltd. Condenser for refrigerating machine
US20030209345A1 (en) * 2002-05-07 2003-11-13 Zweig Mark Alan Tube-in-tube repairable heat exchanger with cross flow
ES2234398A1 (es) * 2003-04-30 2005-06-16 Valeo Termico, S.A. Intercambiador de calor, en especial de los gases de escape de un motor.
JP2005291684A (ja) * 2004-04-06 2005-10-20 Matsushita Electric Ind Co Ltd 熱交換装置及びそれを用いたヒートポンプ給湯装置
JP2008309361A (ja) * 2007-06-12 2008-12-25 Panasonic Corp 冷凍サイクル装置
WO2009125700A1 (fr) * 2008-04-08 2009-10-15 サンデン株式会社 Échangeur de chaleur et dispositif de production d’eau chaude l’utilisant

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114058898A (zh) * 2020-08-07 2022-02-18 LS Metal 株式会社 热导率和断裂强度优异的热交换器用铜合金管及其制法
US11655530B2 (en) 2020-08-07 2023-05-23 Ls Metal Co., Ltd. Copper alloy tube for heat exchanger with excellent thermal conductivity and breaking strength and method of manufacturing the same

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