CN111500890A - Copper pipe and manufacturing method thereof, heat exchanger, air conditioner and refrigeration equipment - Google Patents
Copper pipe and manufacturing method thereof, heat exchanger, air conditioner and refrigeration equipment Download PDFInfo
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- CN111500890A CN111500890A CN202010342862.8A CN202010342862A CN111500890A CN 111500890 A CN111500890 A CN 111500890A CN 202010342862 A CN202010342862 A CN 202010342862A CN 111500890 A CN111500890 A CN 111500890A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
Abstract
The invention provides a copper pipe and a manufacturing method thereof, a heat exchanger, an air conditioner and refrigeration equipment. This copper pipe includes: 99.8 to 99.999 parts by weight of copper; and 0.001 to 0.1 parts by weight of a rare earth metal. The copper pipe is low in cost, high in uniformity, high in tensile strength, excellent in elongation rate and corrosion resistance, long in service life, high in reliability of a manufacturing process and high in production yield.
Description
Technical Field
The invention relates to the technical field of refrigeration equipment, in particular to a copper pipe and a manufacturing method thereof, a heat exchanger, an air conditioner and refrigeration equipment.
Background
Because of the high sulfur content in the air, in the environment with serious air pollution, such as the tropical rain forest, the humid environment, the poor air, the automobile exhaust, the volcanic gas and other areas with serious air pollution, the heat exchanger of the air conditioner or the refrigeration equipment is easy to be corroded due to the copper pipe, so that the local damage or the leakage occurs. The existing solutions are to spray or plate a corrosion-resistant layer on the surface of the copper tube, for example, to spray a corrosion-resistant material on the surface of the copper tube, or to plate other protective metal layers such as tin. However, this operation significantly increases the production cost, and it is difficult to control the formation position of the corrosion-resistant layer by spraying, which is often applied to the peripheral members of the copper pipe during the preparation process. For example, when a corrosion-resistant layer is sprayed on the surface of the heat conductive pipe of the heat exchanger, a corrosion-resistant material is usually sprayed on the fins, resulting in a decrease in heat exchange efficiency. In addition, the uniformity of the sprayed and electroplated protective layer is poor, and the leakage spraying and the leakage plating are often formed on the surface, so that the reliability of the manufacturing process is poor, the yield is low, and the production cost of the air conditioner or the refrigeration equipment is increased.
Thus, the related art of existing copper tubing remains to be improved.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, an object of the present invention is to provide a copper tube for a heat exchanger, which has low cost, high uniformity, high tensile strength, excellent elongation, excellent corrosion resistance, long service life, high reliability of the manufacturing process, or high yield of products.
In one aspect of the invention, the invention provides a copper tube for a heat exchanger. According to an embodiment of the invention, the copper tube comprises: 99.8 to 99.999 parts by weight of copper; and 0.001 to 0.1 parts by weight of a rare earth metal. The inventor finds that the copper pipe is low in cost, high in uniformity, high in tensile strength, excellent in elongation, excellent in corrosion resistance, long in service life, high in reliability of the manufacturing process and high in production yield.
According to an embodiment of the present invention, the weight part of the rare earth metal is 0.001 to 0.009 parts by weight or 0.01 to 0.1 parts by weight.
According to the embodiment of the present invention, the weight part of the rare earth metal is 0.004 to 0.006 part by weight or 0.02 to 0.06 part by weight.
According to an embodiment of the present invention, the weight part of the rare earth metal is 0.005 weight part or 0.04 weight part.
According to an embodiment of the invention, the rare earth metal comprises at least one of lanthanum or cerium.
According to the embodiment of the invention, only one rare earth metal is included, and the weight part of the rare earth metal is 0.02-0.04.
According to an embodiment of the invention, the copper tube comprises at least one of: 99.98 parts by weight of copper, 0.005 parts by weight of cerium; 99.97 parts by weight of copper, 0.02 parts by weight of lanthanum; 99.95 parts by weight of copper, 0.04 parts by weight of lanthanum; 99.93 parts by weight of copper, 0.06 part by weight of lanthanum; 99.97 parts by weight of copper, 0.02 parts by weight of cerium; 99.95 parts by weight of copper, 0.04 parts by weight of cerium; 99.93 parts by weight of copper, 0.06 parts by weight of cerium; 99.97 parts by weight of copper, 0.02 parts by weight of lanthanum and cerium; 99.95 parts by weight of copper, 0.04 parts by weight of lanthanum and cerium; 99.96 parts by weight of copper, 0.03 parts by weight of lanthanum and cerium.
According to an embodiment of the invention, said copper tube satisfies at least one of the following conditions: the tensile strength is not less than 230 MPa; the elongation is not less than 39.8%; in a formic acid solution with the volume fraction of 2%, the maximum depth of the ant cavity corrosion is not more than 11.367 μm.
In another aspect of the invention, the invention provides a method of making a copper tube as hereinbefore described. According to an embodiment of the invention, the method comprises: under the vacuum condition, performing first mixed smelting on rare earth metal and a copper source, and cooling to obtain a prefabricated material; and carrying out second mixed smelting on the prefabricated material and the copper source, and cooling to obtain the copper pipe. The inventor finds that the method is simple and convenient to operate, easy to realize and easy for industrial production, the uniformity of the copper pipe manufactured by the method is high, and the copper pipe with the weight parts of the rare earth metal can be effectively manufactured.
In yet another aspect of the present invention, a heat exchanger is provided. According to an embodiment of the invention, the heat exchanger comprises: a plurality of fins arranged side by side; and a heat pipe inserted into the plurality of fins, wherein at least a part of the heat pipe is the copper pipe. The inventor finds that the heat exchanger is low in cost, excellent in corrosion resistance, long in service life and high in heat exchange efficiency, has all the characteristics and advantages of the copper pipe, and is not described in detail herein.
In yet another aspect of the present invention, an air conditioner is provided. According to an embodiment of the present invention, the air conditioner includes: an indoor heat exchanger; the compressor is connected with the indoor heat exchanger; the outdoor heat exchanger is connected with the compressor; the throttling assembly is connected with the outdoor heat exchanger and the indoor heat exchanger respectively; a refrigerant line communicating the indoor heat exchanger, the compressor, the outdoor heat exchanger, and the throttling assembly to form a refrigerant cycle; the first stop valve and the second stop valve are respectively arranged between the indoor heat exchanger and the compressor and between the indoor heat exchanger and the throttling assembly, wherein at least one of the indoor heat exchanger and the outdoor heat exchanger is the heat exchanger. The inventor finds that the air conditioner has the advantages of low cost, long service life and good refrigeration effect, and has all the characteristics and advantages of the heat exchanger, and redundant description is not repeated.
According to an embodiment of the present invention, the refrigerant line includes an indoor and outdoor unit connection line, the indoor and outdoor unit connection line including: a connecting pipe body defining a refrigerant passage therein; the heat insulation layer is sleeved on the outer surface of the connecting pipe body; wherein, at least one part of the connecting pipe body is the copper pipe.
According to an embodiment of the present invention, the refrigerant line comprises an indoor unit auxiliary line, the indoor unit auxiliary line comprising: an indoor unit connecting pipe; indoor unit branch pipes; and the distributor is respectively connected with the indoor unit connecting pipe and the indoor unit branch pipe so as to ensure that the indoor unit connecting pipe is in fluid communication with the indoor unit branch pipe, wherein at least one part of at least one of the indoor unit connecting pipe, the indoor unit branch pipe and the distributor is the copper pipe.
According to an embodiment of the present invention, the air conditioner further includes: and the four-way valve is used for switching the functions of the outdoor heat exchanger and the indoor heat exchanger, wherein at least one part of the four-way valve is the copper pipe.
According to an embodiment of the present invention, the four-way valve includes: an electromagnetic pilot valve; the main valve body is connected with the electromagnetic guide valve through a capillary; the first to fourth valve ports are arranged on the main valve body, the first valve port is connected with an exhaust port of the compressor, the second valve port is connected with an air suction port of the compressor, the third valve port is connected with the indoor heat exchanger, the fourth valve port is connected with the outdoor heat exchanger, and at least one part of the capillary tube is the copper tube.
In yet another aspect of the present invention, a refrigeration apparatus is provided. According to an embodiment of the invention, the refrigeration device comprises the heat exchanger as described above. The inventor finds that the refrigeration equipment has the advantages of low cost, long service life and good refrigeration effect, and has all the characteristics and advantages of the heat exchanger, and redundant description is not repeated.
Drawings
Fig. 1 shows a schematic flow diagram of a method of making copper tubing according to one embodiment of the present invention.
Fig. 2 shows a schematic structural diagram of a heat exchanger according to an embodiment of the present invention.
Fig. 3 is a schematic structural view showing an air conditioner according to an embodiment of the present invention.
Fig. 4 is a schematic structural view illustrating an indoor and outdoor unit connection pipe according to an embodiment of the present invention.
Fig. 5 shows a schematic structural diagram of an auxiliary pipeline of an indoor unit according to an embodiment of the present invention.
FIG. 6 shows a schematic diagram of a four-way valve according to one embodiment of the present invention.
Reference numerals:
100: indoor heat exchanger 110: fins 1210: heat conductive pipe 130: the dispenser 200: the compressor 300: the outdoor heat exchanger 400: the throttle assembly 500: refrigerant line 600: first shut-off valve 700: second stop valve 510: connecting the pipe body 520: insulating layer 5510: indoor unit connection pipe 5520: indoor unit branch pipes 810: electromagnetic pilot valve 820: main valve body 8210 ~ 8240: first to fourth valve ports
Detailed Description
In one aspect of the invention, the invention provides a copper tube for a heat exchanger. According to an embodiment of the invention, the copper tube comprises: 99.8 to 99.999 parts by weight of copper; and 0.001 to 0.1 parts by weight of a rare earth metal. The inventor finds that the copper pipe is low in cost, high in uniformity, high in tensile strength, excellent in elongation, excellent in corrosion resistance, long in service life, high in reliability of the manufacturing process and high in production yield.
According to the embodiment of the present invention, it should be noted that, the copper pipe for a heat exchanger according to the present invention only includes the entire copper pipe, such as a heat pipe, on the heat exchanger, and does not include a connection structure between the copper pipe and the copper pipe, such as a connection structure between the copper pipe and the copper pipe in the heat exchanger, which is formed by melting and cooling a copper brazing material, and does not include the original brazing material. Meanwhile, in the heat exchanger, the stress condition and the corrosion condition of the surface of the copper pipe are completely different from those of a connecting structure formed by copper brazing filler metal between the copper pipes, namely, the requirements of the material of the copper pipe and the material of the copper brazing filler metal on the mechanical property and the corrosion resistance are different, in particular, important parameters such as the composition, the size, the appearance, whether the brazing filler metal contains a flux core and the like are mainly specified in the GB T6418-. The copper tube of the air-conditioning heat exchanger is used as a structural part, the mechanical property of the copper tube has strict requirements on the mechanical property, and the mechanical property indexes such as tensile strength, yield strength, elongation and the like of the copper tube are definitely specified in the standard of the seamless copper tube for air-conditioning and refrigeration equipment, and the corrosion resistance requirement of the copper tube is the specific requirement caused by different application environments of the heat exchanger. The materials set forth in this disclosure refer only to the materials of the copper tubes of the heat exchanger.
According to an embodiment of the present invention, further, the weight part of the rare earth metal may be 0.001 to 0.009 parts by weight or 0.01 to 0.1 parts by weight, and further, the weight part of the rare earth metal may be 0.004 to 0.006 parts by weight or 0.02 to 0.06 parts by weight. Specifically, the weight part of the rare earth metal may be 0.004 weight part, 0.005 weight part, 0.006 weight part, etc., or 0.02 weight part, 0.03 weight part, 0.04 weight part, 0.05 weight part, 0.06 weight part, etc. Thus, the inventors have found, after extensive studies, that the copper pipe can be made more excellent in the properties when the weight fraction of the rare earth metal is within the above-mentioned range.
According to the embodiment of the invention, specifically, when the weight part of the rare earth metal is 0.004-0.006 part by weight, the copper pipe can have uniformity, tensile strength, elongation and corrosion resistance which meet the use requirements, and meanwhile, the production cost of the copper pipe is obviously reduced, which is beneficial to realizing industrialization.
According to the embodiment of the invention, specifically, when the weight part of the rare earth metal is 0.02-0.06 parts, the copper pipe has the advantages of higher uniformity, higher tensile strength, more excellent elongation, more excellent corrosion resistance and obviously prolonged service life.
According to the embodiment of the invention, after a great deal of intensive investigation and experimental verification, the inventor finds that when the weight part of the rare earth metal is 0.04 weight part, the copper pipe has the advantages of higher uniformity, higher tensile strength, more excellent elongation, more excellent corrosion resistance, obviously prolonged service life and lower cost.
Still further in accordance with an embodiment of the present invention, the particular specie of rare earth metal may include a lanthanide and at least one of yttrium and scandium. In some embodiments of the present invention, the lanthanide may include lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, etc., and further, the rare earth metal may include one or two of lanthanum and cerium (it is to be noted that, when the rare earth metal includes two or more, the ratio of each metal is not particularly limited, and a commercially available mixed rare earth metal may be used as it is, and thus, it will not be described in detail herein again). Meanwhile, it is understood by those skilled in the art that when the rare earth metal includes two or more kinds, a very small amount of inevitable other rare earth metals, such as yttrium, etc., may be included in the rare earth metal. Therefore, the cost is low, and the copper pipe has better tensile strength, elongation and corrosion resistance.
According to the embodiments of the present invention, as a result of a great deal of research, the inventors have surprisingly found that when the copper pipe includes only one kind of the rare earth metal and the weight part of the rare earth metal is 0.02 to 0.04 parts by weight, the copper pipe has an elongation rate that is significantly improved as compared to a copper pipe having other parts by weight of the rare earth metal or a copper pipe having a plurality of kinds of rare earth metals.
According to an embodiment of the present invention, the copper in the copper pipe is provided in a non-limiting manner, for example, in some embodiments of the present invention, the copper pipe may be red copper. Therefore, the purity of copper is higher, and the production is facilitated.
According to an embodiment of the present invention, specifically, the copper tube may include at least one of: 99.98 parts by weight of copper, 0.005 parts by weight of cerium; 99.97 parts by weight of copper, 0.02 parts by weight of lanthanum; 99.95 parts by weight of copper, 0.04 parts by weight of lanthanum; 99.93 parts by weight of copper, 0.06 part by weight of lanthanum; 99.97 parts by weight of copper, 0.02 parts by weight of cerium; 99.95 parts by weight of copper, 0.04 parts by weight of cerium; 99.93 parts by weight of copper, 0.06 parts by weight of cerium; 99.97 parts by weight of copper, 0.02 parts by weight of lanthanum and cerium; 99.95 parts by weight of copper, 0.04 parts by weight of lanthanum and cerium; 99.96 parts by weight of copper, 0.03 parts by weight of lanthanum and cerium. Therefore, the copper pipe is low in cost, further improved in uniformity, further improved in tensile strength, more excellent in elongation rate and corrosion resistance, further prolonged in service life, further improved in reliability of the manufacturing process and further improved in production yield.
According to the embodiment of the invention, it can be understood that the copper pipe of the invention can comprise inevitable impurity elements in metal smelting besides the components, and redundant description is omitted.
According to an embodiment of the invention, said copper tube satisfies at least one of the following conditions: the tensile strength is not less than 230 MPa; the elongation is not less than 39.8%; in a formic acid solution with the volume fraction of 2%, the maximum depth of the ant cavity corrosion is not more than 11.367 μm.
In another aspect of the invention, the invention provides a method of making a copper tube as hereinbefore described. According to an embodiment of the invention, referring to fig. 1, the method comprises the steps of:
s100: under the vacuum condition, performing first mixed melting on rare earth metal and a copper source, and cooling to obtain a prefabricated material.
According to the embodiment of the invention, in this step, the vacuum condition, the temperature and the time of the first mixing melting can be flexibly selected by a person skilled in the art according to actual needs, and redundant description is omitted here.
S200: and carrying out second mixed smelting on the prefabricated material and the copper source, and cooling to obtain the copper pipe.
According to the embodiment of the invention, in this step, the temperature and time of the second mixed melting can be flexibly selected by those skilled in the art according to actual needs, and will not be described in detail herein.
According to the embodiment of the invention, specifically, the method comprises the steps of firstly melting pure copper in a vacuum melting furnace, selecting the eutectic point content of rare earth metal and copper alloy, adding rare earth metal, stirring uniformly after the rare earth metal is melted, cooling and solidifying in a vacuum protective atmosphere, and finally mixing and smelting the obtained prefabricated material and red copper. Therefore, because the content of the rare earth metal in the copper pipe is low, the rare earth metal is added into the red copper in the mode of intermediate alloy during smelting, namely, the rare earth metal and the copper source are firstly mixed and smelted, and then the obtained prefabricated material and the copper source are secondly mixed and smelted, so that the manufactured copper pipe has more accurate content of the rare earth metal, and the yield of the rare earth metal and the uniformity of the distribution of the rare earth metal in the copper pipe are improved.
In yet another aspect of the present invention, a heat exchanger is provided. According to an embodiment of the present invention, referring to fig. 2, the heat exchanger includes: a plurality of fins 110, the plurality of fins 110 being arranged side by side; a heat conductive pipe 1210, wherein the heat conductive pipe 1210 is inserted into the plurality of fins 110, and at least a portion of the heat conductive pipe 1210 is the copper pipe described above. The inventor finds that the heat exchanger is low in cost, excellent in corrosion resistance, long in service life and high in heat exchange efficiency, has all the characteristics and advantages of the copper pipe, and is not described in detail herein.
According to the embodiment of the present invention, the plurality of fins 110 are arranged side by side, and the heat conductive pipe 120 is inserted into the plurality of fins 110 arranged side by side, so that when the refrigerant passes through the heat conductive pipe 120, the refrigerant can effectively exchange heat with the external air (indoor or outdoor) through the heat conductive pipe 120 and the fins 110, thereby achieving the phase change of the refrigerant, and further achieving the temperature adjustment of the indoor air.
According to the embodiment of the present invention, the kind of the heat exchanger is not particularly limited, and the heat exchanger is particularly suitable for a heater, a cooler, a condenser, an evaporator, a reboiler, and the like of an air conditioner or a refrigeration apparatus, and the like, and has a wide application range.
In yet another aspect of the present invention, an air conditioner is provided. According to an embodiment of the present invention, referring to fig. 3, the air conditioner includes: the indoor heat exchanger 100, the compressor 200, the outdoor heat exchanger 300, the throttle assembly 400, the refrigerant line 500, the first cutoff valve 600, and the second cutoff valve 700. In which, according to the embodiment of the present invention, the compressor 200 is connected to the indoor heat exchanger 100, the outdoor heat exchanger 300 is connected to the compressor 200, the throttling assembly 400 is connected to the outdoor heat exchanger 300 and the indoor heat exchanger 100, respectively, the refrigerant pipe 500 communicates the indoor heat exchanger 100, the compressor 200, the outdoor heat exchanger 300, and the throttling assembly 400 to constitute a refrigerant cycle, and the first stop valve 600 and the second stop valve 700 are respectively disposed between the indoor heat exchanger 100 and the compressor 200 and between the indoor heat exchanger 100 and the throttling assembly 400, wherein at least one of the indoor heat exchanger 100 and the outdoor heat exchanger 300 is the heat exchanger as described above. The inventor finds that the air conditioner has the advantages of low cost, long service life and good refrigeration effect, and has all the characteristics and advantages of the heat exchanger, and redundant description is not repeated.
According to the embodiment of the present invention, during the operation of the air conditioner, the refrigerant may sequentially pass through the indoor heat exchanger 100, the first stop valve 600, the compressor 200, the outdoor heat exchanger 300, the throttle assembly 400, the second stop valve 700, and finally return to the indoor heat exchanger 100, thereby forming a refrigerant cycle, and adjusting the indoor temperature, for example, performing a refrigeration process, by the transformation between the gas phase and the liquid phase of the refrigerant, and the heat exchange between the refrigerant and the indoor or outdoor air.
As will be appreciated by those skilled in the art, in accordance with embodiments of the present invention, a heat exchanger, also referred to as an evaporator, in which the refrigerant changes from a liquid phase to a vapor phase, and a heat exchanger, also referred to as a condenser, in which the refrigerant changes from a vapor phase to a liquid phase. In the present invention, the indoor heat exchanger 100 and the outdoor heat exchanger 300 may be the same type of heat exchanger or different types of heat exchangers.
According to an embodiment of the present invention, referring to fig. 4, the refrigerant line includes an indoor and outdoor unit connection line including: the connecting pipe body 510 and the insulating layer 520 define a refrigerant passage in the connecting pipe body 510, and the insulating layer 520 is disposed on an outer surface of the connecting pipe body 510, wherein at least a portion of the connecting pipe body 510 is a copper pipe as described above. Therefore, the corrosion rate of the elements of the air conditioner can be further effectively reduced, and the service life is prolonged.
According to an embodiment of the present invention, referring to fig. 5, the refrigerant line may further include an indoor unit auxiliary line, the indoor unit auxiliary line including: an indoor unit connection pipe 5510; indoor unit branch pipes 5520; the distributor 130 and the distributor 130 are respectively connected to the indoor unit connection pipe 5510 and the indoor unit branch pipe 5520, so that the indoor unit connection pipe 5510 and the indoor unit branch pipe 5520 are in fluid communication, wherein at least a portion of at least one of the indoor unit connection pipe 5510, the indoor unit branch pipe 5520 and the distributor 130 is a copper pipe as described above. Therefore, the corrosion rate of the elements of the air conditioner can be further effectively reduced, and the service life is prolonged.
According to an embodiment of the present invention, in addition, referring to fig. 6, the air conditioner may further include: and the four-way valve is used for switching the functions of the outdoor heat exchanger and the indoor heat exchanger, wherein at least one part of the four-way valve is the copper pipe. Thereby, the corrosion rate of the components of the air conditioner can be further effectively reduced. Through adopting the cross valve, can make the air conditioner can have refrigeration and heating effect simultaneously effectively.
According to an embodiment of the present invention, the four-way valve may include a solenoid pilot valve 810 and a main valve body 820, the main valve body 810 and the solenoid pilot valve 820 are connected through a capillary tube, a first port 8210, a second port 8220, a third port 8230 and a fourth port 8240 are disposed on the main valve body 810, the first port 8210 is connected to an exhaust port of the compressor 200, the second port 8220 is connected to a suction port of the compressor 200, the third port 8230 is connected to the indoor heat exchanger 100, and the fourth port 8240 is connected to the outdoor heat exchanger 300, wherein at least a portion of the capillary tube is a copper tube as described above. Therefore, the corrosion rate of the elements of the air conditioner can be further effectively reduced, and the service life is prolonged.
According to the embodiment of the invention, the air conditioner can be a split wall-mounted air conditioner, a split floor-mounted air conditioner, a mobile air conditioner and the like. Therefore, the application range is wide.
According to the embodiment of the invention, other components and structures in the air conditioner can be components and structures of a conventional air conditioner, and redundant description is omitted.
In yet another aspect of the present invention, a refrigeration apparatus is provided. According to an embodiment of the invention, the refrigeration device comprises the heat exchanger as described above. The inventor finds that the refrigeration equipment has the advantages of low cost, long service life and good refrigeration effect, and has all the characteristics and advantages of the heat exchanger, and redundant description is not repeated.
According to an embodiment of the present invention, the refrigeration device may be a refrigerator, freezer, refrigerator, or the like. Therefore, the application range is wide.
According to the embodiment of the invention, other components and structures in the refrigeration equipment can be components and structures of conventional refrigeration equipment, and redundant description is omitted.
The following describes embodiments of the present invention in detail. The following examples are illustrative only and are not to be construed as limiting the invention. The examples, where specific techniques or conditions are not indicated, are to be construed according to the techniques or conditions described in the literature in the art or according to the product specifications. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products commercially available.
Example 1
A copper pipe for a heat exchanger comprising 99.98 parts by weight of copper and 0.005 parts by weight of cerium.
Example 2
A copper pipe for a heat exchanger, comprising 99.97 parts by weight of copper and 0.02 parts by weight of lanthanum.
Example 3
A copper pipe for a heat exchanger, comprising 99.95 parts by weight of copper and 0.04 parts by weight of lanthanum.
Example 4
A copper pipe for a heat exchanger, comprising 99.93 parts by weight of copper and 0.06 parts by weight of lanthanum.
Example 5
A copper pipe for a heat exchanger comprising 99.97 parts by weight of copper and 0.02 parts by weight of cerium.
Example 6
A copper pipe for a heat exchanger, comprising 99.95 parts by weight of copper and 0.04 parts by weight of cerium.
Example 7
A copper pipe for a heat exchanger, comprising 99.93 parts by weight of copper and 0.06 parts by weight of cerium.
Example 8
A copper tube for a heat exchanger comprises 99.97 parts by weight of copper, 0.02 parts by weight of lanthanum and cerium (using commercially available misch metal in which the cerium content is greater than 61% and the lanthanum content is greater than 32%).
Example 9
A copper tube for a heat exchanger comprises 99.95 parts by weight of copper, 0.04 parts by weight of lanthanum and cerium (using commercially available mischmetal, wherein the cerium content is more than 61% and the lanthanum content is more than 32%).
Example 10
A copper tube for a heat exchanger comprises 99.96 parts by weight of copper, 0.03 parts by weight of lanthanum and cerium (using commercially available mischmetal in which the cerium content is greater than 61% and the lanthanum content is greater than 32%).
Comparative example 1
A copper tube for a heat exchanger comprising 99.98 parts by weight of copper.
Comparative example 2
The copper tube used for the heat exchanger was phosphorus deoxidized copper (TP2) and its surface was dip-plated with pure tin 15 μm thick.
The copper pipes of the above examples and comparative examples were tested for their performance, and the test results are shown in table 1.
Table 1 results of performance test of copper pipes of examples and comparative examples
| Tensile strength (MPa) | Extension ofPercentage (%) | Maximum ant hole depth of corrosion (mum) | |
| Example 1 | 230 | 39.8 | 11.367 |
| Example 2 | 240 | 41.3 | 2.365 |
| Example 3 | 245 | 45.6 | 0.539 |
| Example 4 | 252 | 39.6 | 7.563 |
| Example 5 | 258 | 42.4 | 9.361 |
| Example 6 | 235 | 45.6 | 0.372 |
| Example 7 | 250 | 39.8 | 6.031 |
| Example 8 | 231 | 40.2 | 10.925 |
| Example 9 | 251 | 38.6 | 0.678 |
| Example 10 | 259 | 39.4 | 3.452 |
| Comparative example 1 | 228 | 38.5 | 20.548 |
| Comparative example 2 | 231 | 36.2 | 10.58 |
The performance test method comprises the following steps:
1. tensile strength: part 1 of the GB/T228.1-2010 metallic Material tensile test: room temperature test method.
2. Elongation percentage: part 1 of the GB/T228.1-2010 metallic Material tensile test: room temperature test method.
3. And (3) taking copper pipes with the same specification, ensuring that the sections are flush and tidy, respectively placing the copper pipes into glass pipes, enabling the copper pipes to be 2cm higher than the glass pipes, preparing 1.5L formic acid solution with the volume fraction of 2%, respectively adding 30m L solution into wide-mouth bottles (250m L), placing the glass pipes into the wide-mouth bottles (5 bottles are placed), sealing the wide-mouth bottles by covers, placing the wide-mouth bottles into an environmental test chamber, carrying out a cycle test of × 12h + normal temperature 12h, and testing the final corrosion depth when the test period is 1000 hours.
According to the experimental data, the copper pipe is low in cost, high in uniformity, high in tensile strength, excellent in elongation rate, excellent in corrosion resistance, long in service life, high in reliability of the manufacturing process and high in production yield.
Furthermore, when the weight part of the rare earth metal is 0.04 part by weight, the copper pipe has the advantages of higher uniformity, higher tensile strength, more excellent elongation, more excellent corrosion resistance and obviously prolonged service life.
Still further, when the copper tube only comprises one rare earth metal and the weight part of the rare earth metal is 0.02 to 0.04 parts by weight, the elongation of the copper tube is significantly improved compared with that of a copper tube with other weight parts of rare earth metals or a copper tube with a plurality of rare earth metals.
In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (16)
1. A copper tube for a heat exchanger, comprising:
99.8 to 99.999 parts by weight of copper; and
0.001 to 0.1 parts by weight of a rare earth metal.
2. The copper tube of claim 1, wherein the rare earth metal is present in an amount of 0.001 to 0.009 parts by weight or 0.01 to 0.1 parts by weight.
3. The copper tube of claim 2, wherein the rare earth metal is present in an amount of from 0.004 to 0.006 parts by weight or from 0.02 to 0.06 parts by weight.
4. A copper tube according to claim 3, wherein the rare earth metal is present in an amount of 0.005 parts by weight or 0.04 parts by weight.
5. The copper tube of claim 1, wherein the rare earth metal comprises at least one of lanthanum or cerium.
6. The copper tube of claim 1, wherein only one of said rare earth metals is included, and wherein the weight fraction of said rare earth metal is from 0.02 to 0.04 parts by weight.
7. The copper tube of claim 1, comprising at least one of:
99.98 parts by weight of copper, 0.005 parts by weight of cerium;
99.97 parts by weight of copper, 0.02 parts by weight of lanthanum;
99.95 parts by weight of copper, 0.04 parts by weight of lanthanum;
99.93 parts by weight of copper, 0.06 part by weight of lanthanum;
99.97 parts by weight of copper, 0.02 parts by weight of cerium;
99.95 parts by weight of copper, 0.04 parts by weight of cerium;
99.93 parts by weight of copper, 0.06 parts by weight of cerium;
99.97 parts by weight of copper, 0.02 parts by weight of lanthanum and cerium;
99.95 parts by weight of copper, 0.04 parts by weight of lanthanum and cerium;
99.96 parts by weight of copper, 0.03 parts by weight of lanthanum and cerium.
8. The copper tube of claim 1, wherein at least one of the following conditions is satisfied:
the tensile strength is not less than 230 MPa;
the elongation is not less than 39.8%;
in a formic acid solution with the volume fraction of 2%, the maximum depth of the ant cavity corrosion is not more than 11.367 μm.
9. A method of making the copper tube of any one of claims 1 to 8, comprising:
under the vacuum condition, performing first mixed smelting on rare earth metal and a copper source, and cooling to obtain a prefabricated material;
and carrying out second mixed smelting on the prefabricated material and the copper source, and cooling to obtain the copper pipe.
10. A heat exchanger, comprising:
a plurality of fins arranged side by side;
a heat pipe inserted into the plurality of fins, at least a part of the heat pipe being the copper pipe according to any one of claims 1 to 8.
11. An air conditioner, comprising:
an indoor heat exchanger;
the compressor is connected with the indoor heat exchanger;
the outdoor heat exchanger is connected with the compressor;
the throttling assembly is connected with the outdoor heat exchanger and the indoor heat exchanger respectively;
a refrigerant line communicating the indoor heat exchanger, the compressor, the outdoor heat exchanger, and the throttling assembly to form a refrigerant cycle;
first and second shutoff valves respectively disposed between the indoor heat exchanger and the compressor and between the indoor heat exchanger and the throttle assembly,
wherein at least one of the indoor heat exchanger and the outdoor heat exchanger is the heat exchanger of claim 10.
12. The air conditioner according to claim 11, wherein the refrigerant line comprises an indoor and outdoor unit connection line, the indoor and outdoor unit connection line comprising:
a connecting pipe body defining a refrigerant passage therein;
the heat insulation layer is sleeved on the outer surface of the connecting pipe body;
wherein at least a part of the connecting pipe body is the copper pipe of any one of claims 1 to 8.
13. The air conditioner of claim 11, wherein said refrigerant line comprises an indoor unit auxiliary line, said indoor unit auxiliary line comprising:
an indoor unit connecting pipe;
indoor unit branch pipes;
a distributor connected to the indoor unit connection pipe and the indoor unit branch pipe, respectively, so that the indoor unit connection pipe and the indoor unit branch pipe form fluid communication,
wherein at least a part of at least one of the indoor unit connection pipe, the indoor unit branch pipe, and the distributor is the copper pipe according to any one of claims 1 to 8.
14. The air conditioner as claimed in claim 11, further comprising:
a four-way valve for switching functions of the outdoor heat exchanger and the indoor heat exchanger,
wherein at least one part of the four-way valve is the copper pipe of any one of claims 1 to 8.
15. The air conditioner of claim 14, wherein the four-way valve comprises:
an electromagnetic pilot valve;
the main valve body is connected with the electromagnetic guide valve through a capillary;
first to fourth ports provided on the main valve body, the first port being connected to an exhaust port of the compressor, the second port being connected to a suction port of the compressor, the third port being connected to the indoor heat exchanger, the fourth port being connected to the outdoor heat exchanger,
wherein at least a portion of the capillary tube is a copper tube as defined in any one of claims 1 to 8.
16. A refrigeration apparatus comprising the heat exchanger of claim 10.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010342862.8A CN111500890A (en) | 2020-04-27 | 2020-04-27 | Copper pipe and manufacturing method thereof, heat exchanger, air conditioner and refrigeration equipment |
| PCT/CN2021/088673 WO2021218737A1 (en) | 2020-04-27 | 2021-04-21 | Copper pipe and manufacturing method therefor, heat exchanger, air conditioner and refrigeration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010342862.8A CN111500890A (en) | 2020-04-27 | 2020-04-27 | Copper pipe and manufacturing method thereof, heat exchanger, air conditioner and refrigeration equipment |
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| CN111500890A true CN111500890A (en) | 2020-08-07 |
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| CN202010342862.8A Pending CN111500890A (en) | 2020-04-27 | 2020-04-27 | Copper pipe and manufacturing method thereof, heat exchanger, air conditioner and refrigeration equipment |
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| CN (1) | CN111500890A (en) |
| WO (1) | WO2021218737A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021218737A1 (en) * | 2020-04-27 | 2021-11-04 | 美的集团股份有限公司 | Copper pipe and manufacturing method therefor, heat exchanger, air conditioner and refrigeration device |
| CN115198140A (en) * | 2021-04-13 | 2022-10-18 | 美的集团股份有限公司 | Copper alloy and application thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103484712A (en) * | 2012-12-17 | 2014-01-01 | 阮伟光 | Bismuth brass alloy drawn pipe containing trace rare earth and manufacture method thereof |
| CN103866157A (en) * | 2014-03-11 | 2014-06-18 | 宁波金田铜管有限公司 | High-strength corrosion-resistant micro-alloying copper pipe and manufacturing method thereof |
| CN104103338A (en) * | 2014-06-30 | 2014-10-15 | 中色奥博特铜铝业有限公司 | Ultralong high-conductivity cable copper tape and production technology thereof |
| CN106319277A (en) * | 2015-06-19 | 2017-01-11 | 中国科学院金属研究所 | Rare earth corrosion-resistant copper alloy and production technology thereof |
| CN207146985U (en) * | 2017-07-25 | 2018-03-27 | 广东美的制冷设备有限公司 | Heat exchanger, air conditioner and refrigeration plant |
| CN109402447A (en) * | 2018-12-17 | 2019-03-01 | 芜湖精艺铜业有限公司 | One Albatra metal, copper pipe and preparation method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE526673C2 (en) * | 2003-08-28 | 2005-10-25 | Sandvik Intellectual Property | Use of a metal sputtering resistant copper alloy |
| CN111500890A (en) * | 2020-04-27 | 2020-08-07 | 美的集团股份有限公司 | Copper pipe and manufacturing method thereof, heat exchanger, air conditioner and refrigeration equipment |
-
2020
- 2020-04-27 CN CN202010342862.8A patent/CN111500890A/en active Pending
-
2021
- 2021-04-21 WO PCT/CN2021/088673 patent/WO2021218737A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103484712A (en) * | 2012-12-17 | 2014-01-01 | 阮伟光 | Bismuth brass alloy drawn pipe containing trace rare earth and manufacture method thereof |
| CN103866157A (en) * | 2014-03-11 | 2014-06-18 | 宁波金田铜管有限公司 | High-strength corrosion-resistant micro-alloying copper pipe and manufacturing method thereof |
| CN104103338A (en) * | 2014-06-30 | 2014-10-15 | 中色奥博特铜铝业有限公司 | Ultralong high-conductivity cable copper tape and production technology thereof |
| CN106319277A (en) * | 2015-06-19 | 2017-01-11 | 中国科学院金属研究所 | Rare earth corrosion-resistant copper alloy and production technology thereof |
| CN207146985U (en) * | 2017-07-25 | 2018-03-27 | 广东美的制冷设备有限公司 | Heat exchanger, air conditioner and refrigeration plant |
| CN109402447A (en) * | 2018-12-17 | 2019-03-01 | 芜湖精艺铜业有限公司 | One Albatra metal, copper pipe and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 张士宏等: "《精密铜管铸轧加工技术》", 29 February 2016, 国防工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021218737A1 (en) * | 2020-04-27 | 2021-11-04 | 美的集团股份有限公司 | Copper pipe and manufacturing method therefor, heat exchanger, air conditioner and refrigeration device |
| CN115198140A (en) * | 2021-04-13 | 2022-10-18 | 美的集团股份有限公司 | Copper alloy and application thereof |
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| Publication number | Publication date |
|---|---|
| WO2021218737A1 (en) | 2021-11-04 |
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