Method for manufacturing integrated pipe for heat exchange and integrated pipe for heat exchange manufactured by using same

Abstract

The present invention relates to a method for manufacturing an integrated pipe for heat exchange, by which an integrated pipe for heat exchange is manufactured, and an integrated pipe for heat exchange manufactured by using the same. The method includes: an extrusion step of heating a material to extrude an integrated pipe for heat exchange; a primary cutting step of cutting a pipe to an arbitrary length; a transfer step of laterally transferring the pipe; a cooling step of cooling the pipe; a secondary cutting step of cutting the pipe to a predetermined length; an expansion step of expanding opposite end portions of the pipe; and a discharge step of discharging the pipe. Therefore, the present invention can simplify a manufacturing process of an integrated pipe for heat exchange and lighten the pipe to improve productivity and marketability of the pipe by integrally extruding the integrated pipe for heat exchange, primarily cutting the pipe, cooling the pipe, and secondarily cutting the pipe to expand opposite end portions of the pipe.

Description

Manufacturing method of integral heat exchange pipe and integral heat exchange pipe manufactured using the same

[0001] The present invention relates to a method for manufacturing an integral pipe for heat exchange and an integral pipe for heat exchange manufactured using the same, and more particularly, to a method for manufacturing an integral pipe for heat exchange and an integral pipe for heat exchange manufactured using the same.

[0002] Typically, in a refrigeration cycle, refrigerant circulates through a compressor, condenser, expansion valve, and evaporator. Heat exchange occurs between the subcooled, low-pressure, cold refrigerant exiting the evaporator and the high-pressure, warm refrigerant entering the expansion valve from the condenser. This lowers the temperature of the refrigerant entering the evaporator, thereby improving cooling performance. To achieve this refrigerant heat exchange, double-pipe systems are used in refrigeration piping systems.

[0003] In addition, among heat exchangers, the fin pipe type heat exchanger and the cooling and heating heat exchanger using the radiating fin cause a cooling effect when the heat of the fluid passing through the inside of the fin pipe type heat exchanger is radiated into the air or liquid through the external radiating fin, and when the heat exchange is increased through the radiating fin to the guide hole and the heat is absorbed, the fluid is rapidly heated to perform heat exchange, and is a device widely used in effective condensers or evaporators of air conditioners such as refrigerators or air conditioners, radiators of automobiles, rapid heaters, and heat sinks for cooling electronic components.

[0004] Among these, heat exchangers that are formed by pre-processing and drawing a fin pipe type heat exchanger to form a heat dissipation fin as an integral part have high heat transfer efficiency and are mainly used in evaporation units for air conditioners, radiators, and dehumidifiers.

[0005] However, the heat exchanger in which the heat dissipation fins are integrally formed is such that when the fluid passes through the inside of the fin pipe type heat exchanger, the liquid or gaseous fluid does not evenly contact the inner surface of the fin pipe type heat exchanger by 100% or more to exchange heat, and instead, some of the fluid passes quickly to the center of the tube as is, which reduces heat transfer with the external heat dissipation fins. This can be seen as the biggest problem in the heat exchange of existing fluids and heat exchangers for fin pipes.

[0006] That is, in general, when there is no device inside the fluid heat exchanger that causes the fluid to vortex periodically, some of the heat remaining on the surface of the fluid is well transferred to the fin pipe type heat exchanger, but the heat in the inner center of the oil is not well transferred, which has limitations in increasing the heat transfer efficiency.

[0007] In addition, the capillary tube of this heat exchanger is widely used in small-capacity electric refrigerators, room air conditioners, car air conditioners, showcases, etc. When considering the efficiency of the refrigeration device, it is better to constantly adjust the manual expansion valve or use a thermostatic automatic expansion valve, but in small-capacity refrigeration devices, the capillary tube is widely used in terms of cost, and it is also the simplest in structure, so there are few parts to fail, and during compressor stop, the high-pressure and low-pressure parts are pressure balanced through the capillary tube, making it easy to start the compressor.

[0008] Recently, attempts have been made to replace copper in terms of material diversification, and aluminum is the metal that is the most abundant among the elements that make up the Earth's crust, and not only does it have excellent properties such as processability, lightness, and conductivity, but it is also easy to alloy with other metals and can have various material properties depending on the composition of the alloying elements, so it is attracting attention as a material to replace copper capillaries.

[0009] However, when aluminum alloy is used to manufacture capillaries through an extrusion process using a hot working method, the characteristics and corrosion resistance of the aluminum alloy can be maintained, but the diameter of the capillary is small, so the extrusion rate decreases due to a low extrusion ratio, making it impossible to manufacture capillaries or requiring additional processes, which increases manufacturing costs.

[0010] In particular, for aluminum capillaries to replace copper, the aluminum alloy must maintain properties such as corrosion resistance even after being processed into aluminum capillaries. Therefore, optimization of the process is required to manufacture capillaries that meet the design diameter specifications while maintaining the raw material properties and corrosion resistance of the aluminum alloy.

[0011] As a prior art for solving this problem, there is Patent Publication No. 10-2021-0016847, but the prior art does not solve the problem of joining because it uses aluminum capillaries with different inner diameters by simultaneously extruding them and independently compressing them to join multiple aluminum capillaries with different inner diameters.

[0012] The present invention has been devised to solve the above-mentioned conventional problems, and the purpose of the present invention is to provide a method for manufacturing an integrated heat exchange pipe, which can simplify the manufacturing process of an integrated heat exchange pipe and improve the productivity and marketability of the pipe by extruding an integrated heat exchange pipe as a whole, cutting it a first time and cooling it, and then cutting it a second time to form an expansion pipe at both ends, and an integrated heat exchange pipe manufactured using the same.

[0013] In addition, the present invention provides a method for manufacturing an integrated heat exchange pipe, which can improve heat exchange performance by integrally extruding the first pipe part and the second pipe part of the integrated heat exchange pipe or integrally extruding the first pipe part, the second pipe part, and the third pipe part, thereby reducing the manufacturing cost and manufacturing time of the integrated heat exchange pipe and improving the manufacturing performance of the heat exchange equipment, and a method for manufacturing an integrated heat exchange pipe manufactured using the same.

[0014] In addition, the present invention provides a method for manufacturing an integrated heat exchange pipe, which can improve the applicability of an integrated heat exchange pipe by simultaneously cutting the first and second pipe portions of the integrated heat exchange pipe into predetermined sizes or simultaneously cutting the first, second, and third pipe portions into predetermined sizes, thereby applying the integrated heat exchange pipe to heat exchange facilities of various sizes, and an integrated heat exchange pipe manufactured using the same.

[0015] In addition, the present invention provides a method for manufacturing an integrated heat exchange pipe, which can improve the processing performance of the expansion step by expanding and forming both ends of the first pipe section and the second pipe section of the integrated heat exchange pipe together to a size of a predetermined ratio or by expanding and forming both ends of the first pipe section, the second pipe section, and the third pipe section together to a size of a predetermined ratio, thereby facilitating the connection between the expanded pipe section and the connecting pipe, thereby improving the sealing performance and the connection performance between the expanded pipe section and the connecting pipe, and an integrated heat exchange pipe manufactured using the same.

[0016] In order to achieve the above object, the present invention provides a method for manufacturing a heat exchange integral pipe, which manufactures a heat exchange integral pipe, comprising: an extrusion step of heating a material to extrude the heat exchange integral pipe; a first cutting step of cutting the heat exchange integral pipe extruded in the extrusion step into an arbitrary length; a transport step of laterally transporting the heat exchange integral pipe cut in the first cutting step; a cooling step of cooling the heat exchange integral pipe transported in the transport step; a second cutting step of cutting the heat exchange integral pipe cooled in the cooling step into a predetermined length; an expansion step of expanding both ends of the second-cut heat exchange integral pipe; and a discharge step of discharging the expanded heat exchange integral pipe.

[0017] The extrusion step of the present invention is characterized by integrally extruding the first pipe part (10) and the second pipe part (20) of the integrated pipe for heat exchange. The extrusion step of the present invention is characterized by integrally extruding the first pipe part (10), the second pipe part (20), and the third pipe part (30) of the integrated pipe for heat exchange.

[0018] The second cutting step of the present invention is characterized by cutting both ends of the first pipe section (10) and the second pipe section (20) of the integrated pipe for heat exchange to a predetermined size at the same time.

[0019] The second cutting step of the present invention is characterized by cutting both ends of the first pipe section (10), the second pipe section (20), and the third pipe section (30) of the integrated pipe for heat exchange to a predetermined size at the same time.

[0020] The above-described expansion step of the present invention is characterized in that the inner diameter of the first expansion pipe (12) of the first pipe section (10) of the integrated pipe for heat exchange is expanded to be 1.05 to 1.50 times larger than the inner diameter size of the first pipe (11).

[0021] The above-described expansion step of the present invention is characterized in that the inner diameter of the second expansion pipe (22) of the second pipe section (20) of the heat exchange integral pipe is expanded to be 1.2 to 3.0 times larger than the inner diameter size of the second pipe (21), or the inner diameter of the third expansion pipe (32) of the third pipe section (30) of the heat exchange integral pipe is expanded to be 1.2 to 3.0 times larger than the inner diameter size of the third pipe (31).

[0022] The above-described expansion step of the present invention is characterized by expanding the first pipe section (10) and the second pipe section (20) of the integrated pipe for heat exchange together, or expanding the first pipe section (10), the second pipe section (20) and the third pipe section (30) of the integrated pipe for heat exchange together.

[0023] In addition, the present invention features an integrated heat exchange pipe manufactured using the method for manufacturing an integrated heat exchange pipe described above.

[0024] In addition, the integrated heat exchange pipe of the present invention is characterized in that it is installed between the condenser and the evaporator of the refrigerator.

[0025] As described above, the present invention provides an effect that simplifies the manufacturing process of an integrated heat exchange pipe, reduces the weight of the pipe, and improves the productivity and marketability of the pipe by extruding the integrated heat exchange pipe as a whole, cutting it a second time after first cutting and cooling it, and forming an expansion pipe at both ends.

[0026] In addition, by integrally extruding the first and second pipe sections of the heat exchange integrated pipe or integrally extruding the first, second and third pipe sections, the heat exchange integrated pipe can be applied to various heat exchange facilities to improve heat exchange performance, while reducing the manufacturing cost and manufacturing time of the heat exchange integrated pipe, thereby providing an effect of improving the manufacturing performance of the heat exchange facility.

[0027] In addition, by simultaneously cutting the first and second pipe sections of the integrated heat exchange pipe to a predetermined size or simultaneously cutting the first, second and third pipe sections to a predetermined size, the integrated heat exchange pipe can be applied to heat exchange equipment of various sizes, thereby improving the applicability of the integrated heat exchange pipe.

[0028] In addition, by expanding and forming both ends of the first and second pipe sections of the integrated pipe for heat exchange together to a size of a predetermined ratio, or by expanding and forming both ends of the first, second and third pipe sections together to a size of a predetermined ratio, the processing performance of the expansion step is improved, and at the same time, the connection between the expanded pipe section and the connecting pipe is facilitated, thereby providing the effect of improving the sealing performance and connection performance between the expanded pipe section and the connecting pipe.

[0029] Figure 1 is a schematic diagram showing a method for manufacturing an integrated pipe for heat exchange according to one embodiment of the present invention.

[0030] Figure 2 is a schematic diagram showing a cutting and expansion equipment of a method for manufacturing an integrated pipe for heat exchange according to one embodiment of the present invention.

[0031] Figure 3 is a configuration diagram showing a cutter in a second cutting step of a method for manufacturing an integrated pipe for heat exchange according to one embodiment of the present invention.

[0032] Figure 4 is a state diagram showing a state before the expansion step of an example of a method for manufacturing an integrated pipe for heat exchange according to one embodiment of the present invention.

[0033] Figure 5 is a state diagram showing a state after the expansion step of an example of a method for manufacturing an integrated pipe for heat exchange according to one embodiment of the present invention.

[0034] Figure 6 is a state diagram showing a state before the expansion step of another example of a method for manufacturing an integrated pipe for heat exchange according to one embodiment of the present invention.

[0035] Fig. 7 is a state diagram showing a state after the expansion step of another example of a method for manufacturing an integrated pipe for heat exchange according to one embodiment of the present invention.

[0036] FIG. 8 is a detailed view showing an example of an integrated heat exchange pipe manufactured using a method for manufacturing an integrated heat exchange pipe according to one embodiment of the present invention.

[0037] FIG. 9 is a detailed view showing another example of an integrated heat exchange pipe manufactured using a method for manufacturing an integrated heat exchange pipe according to one embodiment of the present invention.

[0038] <Description of the main components of the drawing>

[0039] 10: First piping section

[0040] 20: 2nd piping section

[0041] 30: Third Piping Section

[0042] Hereinafter, a preferred embodiment of the present invention will be described in more detail with reference to the attached drawings.

[0043] FIG. 1 is a schematic diagram showing a method for manufacturing an integrated heat exchange pipe according to an embodiment of the present invention, FIG. 2 is a schematic diagram showing a cutting and expansion equipment of a method for manufacturing an integrated heat exchange pipe according to an embodiment of the present invention, FIG. 3 is a schematic diagram showing a cutter of a second cutting step of a method for manufacturing an integrated heat exchange pipe according to an embodiment of the present invention, FIG. 4 is a schematic diagram showing a state before an expansion step of an example of a method for manufacturing an integrated heat exchange pipe according to an embodiment of the present invention, FIG. 5 is a schematic diagram showing a state after an expansion step of an example of a method for manufacturing an integrated heat exchange pipe according to an embodiment of the present invention, FIG. 6 is a schematic diagram showing a state before an expansion step of another example of a method for manufacturing an integrated heat exchange pipe according to an embodiment of the present invention, FIG. 7 is a schematic diagram showing a state after an expansion step of another example of a method for manufacturing an integrated heat exchange pipe according to an embodiment of the present invention, and FIG. 8 is a schematic diagram showing a heat exchange pipe manufactured using a method for manufacturing an integrated heat exchange pipe according to an embodiment of the present invention. This is a detailed drawing showing an example of an integrated pipe, and FIG. 9 is a detailed drawing showing another example of an integrated pipe for heat exchange manufactured using a method for manufacturing an integrated pipe for heat exchange according to an embodiment of the present invention.

[0044] As shown in Fig. 1, the method for manufacturing an integrated pipe for heat exchange according to the present embodiment is a method for manufacturing an integrated pipe for heat exchange, which comprises an extrusion step (S10), a first cutting step (S20), a transport step (S30), a cooling step (S40), a second cutting step (S50), an expansion step (S60), and a discharge step (S70).

[0045] The extrusion step (S10) is a step of extruding an integrated pipe for heat exchange by heating the material, and the first pipe part (10) and the second pipe part (20) of the integrated pipe for heat exchange are extruded as one piece.

[0046] In this extrusion step (S10), the aluminum material is heated to a high temperature and fed into the extrusion equipment, and an integrated pipe for heat exchange is extruded by the high-pressure extrusion equipment. At the same time, it is also possible to improve the extrusion performance of the extrusion equipment by installing auxiliary equipment such as a drawing equipment and a guide roller downstream of the extrusion equipment.

[0047] In addition, in the extrusion step (S10) of the present invention, it is also possible to integrally extrude the first pipe section (10), the second pipe section (20), and the third pipe section (30) of the integrated pipe for heat exchange.

[0048] The first cutting step (S20) is a step of cutting the integral heat exchange pipe extruded in the extrusion step (S10) to an arbitrary length. The integral heat exchange pipe extruded to a predetermined length is cut by the first cutting device installed downstream of the extrusion device so that the cutter can be moved up and down.

[0049] The transfer step (S30) is a step of transferring the integral heat exchange pipe cut in the first cutting step (S20) laterally. The integral heat exchange pipe cut in the first cutting step (S20) is guided to the upper part of the guide device and transferred to the loading space on the side by a side transfer device installed to be lifted up and down on the guide device.

[0050] The cooling step (S40) is a step of cooling the integrated heat exchange pipe transferred in the transfer step (S30), and the integrated heat exchange pipe transferred to the side loading space by the side transfer equipment is cooled in the loading space for a predetermined period of time.

[0051] The second cutting step (S50) is a step of cutting the integrated heat exchange pipe cooled in the cooling step (S40) to a predetermined length, and both ends of the first pipe section (10) and the second pipe section (20) of the integrated heat exchange pipe are simultaneously cut to a predetermined size by a second cutting device.

[0052] The second cutting equipment (1000), as shown in FIGS. 2 and 3, is formed to be long in the longitudinal direction and is provided with a first guide rail (100) on one side of the upper surface of the plate shape, and is provided with spacer holders (101) at predetermined intervals at predetermined positions, and is composed of a table having a plurality of carriages (102) on the lower surface, a moving cylinder (220), and a first expansion cylinder (322) and a second expansion cylinder (500) installed at both ends of the table.

[0053] This second cutting equipment has a pair of cutting mounting plates with a slit formed vertically at a predetermined position, a cutting cylinder is provided on the upper part of the upper plate of the cutting mounting plates, and a cutting blade is provided on the lower surface of the cutting cylinder.

[0054] This cutting blade (400) has a leading edge cutting blade (410) formed in the center of the front of the lower surface, and an oval cutting blade (420) formed concavely on both sides of the leading edge cutting blade (410), and a tapered surface (421) formed at the rear of the oval cutting blade (420) that is inclined upward.

[0055] In addition, in another second cutting step (S50) of the present invention, it is also possible to simultaneously cut both ends of the first pipe section (10), the second pipe section (20), and the third pipe section (30) of the integrated pipe for heat exchange to a predetermined size.

[0056] The expansion step (S60) is a step in which both ends of the integrated heat exchange pipe that was cut for the second time in the second cutting step (S50) are expanded by an expansion device, and the inner diameter of the first expansion pipe (12) of the first pipe section (10) of the integrated heat exchange pipe is expanded to be 1.05 to 1.50 times larger than the inner diameter size of the first pipe (11).

[0057] In addition, this expansion step (S60) expands the inner diameter of the second expansion pipe (22) of the second pipe section (20) of the heat exchange integral pipe to be 1.2 to 3.0 times larger than the inner diameter size of the second pipe (21).

[0058] In addition, in another expansion step (S60) of the present invention, it is also possible to expand the inner diameter of the third expansion pipe (32) of the third pipe section (30) of the integrated pipe for heat exchange to be 1.2 to 3.0 times larger than the inner diameter size of the third pipe (31).

[0059] In this expansion step (S60), it is of course possible to expand the first pipe section (10) and the second pipe section (20) of the integrated pipe for heat exchange together, or to expand the first pipe section (10), the second pipe section (20) and the third pipe section (30) of the integrated pipe for heat exchange together.

[0060] The expansion equipment is installed at both ends of the second cutting equipment (1000) as shown in FIGS. 2 and 4 to 7, and is equipped with an expansion tool that expands the first pipe section (10) and the second pipe section (20) of the heat exchange integrated pipe together by the forward and backward driving force of the first expansion cylinder (322) and the second expansion cylinder (500) installed at both ends of the table, or expands the first pipe section (10), the second pipe section (20) and the third pipe section (30) of the heat exchange integrated pipe together.

[0061] This expansion tool is composed of a first expansion tool (510) and a second expansion tool (520) that expand the first pipe section (10) and the second pipe section (20) of the integrated pipe for heat exchange together, or is composed of a first expansion tool (510), a second expansion tool (520) and a third expansion tool (530) that expand the first pipe section (10), the second pipe section (20) and the third pipe section (30) of the integrated pipe for heat exchange together.

[0062] The discharge step (S70) is a step for discharging the integrated heat exchange pipe, which has been expanded at both ends in the expansion step (S60), and the integrated heat exchange pipe, which has been expanded at both ends, is discharged to the outside by a discharge member such as a side transfer cylinder.

[0063] As shown in Fig. 8, an example of an integrated heat exchange pipe manufactured by the manufacturing method of the present invention is an integrated heat exchange pipe that includes a first pipe section (10) and a second pipe section (20) and is installed between a condenser and an evaporator of a refrigeration facility, a freezing facility, an air conditioning facility, a refrigerator, etc.

[0064] The first pipe section (10) is a pipe member through which the first fluid flows, and is made of an aluminum heat dissipation suction pipe that is extruded and formed integrally with the second pipe section (20) to be used in a heat exchanger such as a refrigerator or air conditioner.

[0065] This first pipe section (10) is composed of a first pipe (11) extruded to a predetermined size, an 11th inner diameter (d11), to allow a heat exchange fluid to flow through the first pipe for installation in a refrigeration facility, a freezing facility, an air conditioning facility, etc., and a first expanded pipe (12) expanded to a 12th inner diameter (d12).

[0066] The first expansion pipe (12) is a pipe member formed by expansion so that the first connecting pipe is connected to each of the two ends inside the first pipe section (10), and is formed by expansion to a 12th inner diameter (d12) of a predetermined size by press-fitting of the expansion pipe so that the first connecting pipe made of copper is fitted and connected by welding so that a heat exchange fluid installed in a refrigeration facility, a freezing facility, an air conditioning facility, etc. flows.

[0067] It is preferable that the first expansion pipe (12) is formed such that the 12th inner diameter (d12) of the first expansion pipe (12) is 1.05 to 1.50 times larger than the 11th inner diameter (d11) of the first pipe (11) of the first pipe section (10).

[0068] The second pipe section (20) is formed integrally on one side of the first pipe section (10) and is a pipe member through which the second fluid flows. It is made of a capillary tube for refrigerant circulation made of aluminum material that is extruded integrally with the first pipe section (10) to be used in a heat exchanger such as a refrigerator or air conditioner.

[0069] This second pipe section (20) is composed of a second pipe (21) extruded to a 21st inner diameter (d21) of a predetermined size so that a heat exchange fluid installed in a refrigeration facility, a freezing facility, an air conditioning facility, etc. can flow, and a second expanded pipe (22) expanded to a 22nd inner diameter (d22).

[0070] In addition, it is preferable that the second pipe (21) be spaced apart from the center of the first pipe (11) by a predetermined distance that is 1.5 to 2.0 times larger than the size of the 21st inner diameter (d21) of the second pipe (21) than half of the sum of the size of the 11th inner diameter (d11) of the first pipe (11) and the size of the 21st inner diameter (d21) of the second pipe (21), so as to minimize deformation or extrusion defects when the first pipe part (10) and the second pipe part (20) are extruded as one piece.

[0071] The second expansion pipe (22) is a pipe member formed by expansion so that a second connecting pipe is fitted into both ends of the inside of the second pipe section (20) and connected by welding, and is formed by expansion to a predetermined size of 22nd inner diameter (d22) by press-fitting of the expansion pipe so that a second connecting pipe made of copper is fitted into it and connected by welding so that a heat exchange fluid installed in a refrigeration facility, a freezing facility, an air conditioning facility, etc. flows.

[0072] It is preferable that the second expansion pipe (22) is formed such that the 22nd inner diameter (d22) of the second expansion pipe (22) is 1.2 to 3.0 times larger than the 21st inner diameter (d21) of the second pipe (21) of the second pipe section (20).

[0073] As shown in Fig. 9, another example of an integrated heat exchange pipe manufactured by the manufacturing method of the present invention is an integrated heat exchange pipe that includes a first pipe section (10), a second pipe section (20), and a third pipe section (30) and is installed between a condenser and an evaporator of a refrigeration facility, a freezing facility, an air conditioning facility, a refrigerator, etc.

[0074] The first pipe section (10) is a pipe member through which the first fluid flows, and is made of an aluminum heat dissipation suction pipe that is integrally extruded with the second pipe section (20) and the third pipe section (30) to be used in a heat exchanger such as a refrigerator or air conditioner.

[0075] The second pipe section (20) is formed integrally on one side of the first pipe section (10) and is a pipe member through which the second fluid flows. It is made of a capillary tube for refrigerant circulation made of aluminum that is extruded integrally with the first pipe section (10) and the third pipe section (30) to be used in a heat exchanger such as a refrigerator or air conditioner.

[0076] The configuration of the first pipe section (10) and the second pipe section (20) of another example is the same as the configuration of the first pipe section (10) and the second pipe section (20) of the above example, so a detailed description is omitted, and the configuration of the third pipe section (30) with a different configuration is described in detail.

[0077] The third pipe section (30) is formed integrally on the other side of the first pipe section (10) and is a pipe member through which the second fluid flows. It is made of a capillary tube for refrigerant circulation made of aluminum that is extruded integrally with the first pipe section (10) and the second pipe section (20) to be used in a heat exchanger such as a refrigerator or air conditioner.

[0078] This third pipe section (30) is composed of a third pipe (31) extruded to a predetermined size of 31st inner diameter (d31) to allow the heat exchange fluid installed in refrigeration equipment, freezing equipment, air conditioning equipment, etc. to flow, and a third expanded pipe (32) expanded to a 32nd inner diameter (d32).

[0079] In addition, it is preferable that the third pipe (31) be spaced apart from the center of the first pipe (11) by a predetermined distance that is 1.5 to 2.0 times larger than the size of the 31st inner diameter (d31) of the third pipe (31) than half of the sum of the size of the 11th inner diameter (d11) of the first pipe (11) and the size of the 31st inner diameter (d31) of the third pipe (31), so as to minimize deformation or extrusion defects when the first pipe section (10), the second pipe section (20), and the third pipe section (30) are extruded as one piece.

[0080] Accordingly, the distance between the second pipe (21) and the third pipe (31) is formed by the sum of the distance between the first pipe (11) and the second pipe (21) and the distance between the first pipe (11) and the third pipe (31).

[0081] The third expansion pipe (32) is a pipe member formed by expansion so that a third connecting pipe is fitted into both ends of the inside of the third pipe section (30) and connected by welding, and is formed by expansion to a predetermined size of 32 inner diameter (d32) by press-fitting of the expansion pipe so that a third connecting pipe made of copper is fitted into it and connected by welding so that a heat exchange fluid installed in a refrigeration facility, a freezing facility, an air conditioning facility, etc. flows.

[0082] It is preferable that the third expansion pipe (32) is formed such that the 32nd inner diameter (d32) of the third expansion pipe (32) is 1.2 to 3.0 times larger than the 31st inner diameter (d31) of the third pipe (31) of the third pipe section (30).

[0083] As described above, according to the present invention, by extruding a heat exchange integral pipe as a whole and then cutting it a second time after first cutting and cooling to form an expansion pipe at both ends, the manufacturing process of the heat exchange integral pipe is simplified, and the pipe is made lighter, thereby providing the effect of improving the productivity and marketability of the pipe.

[0084] In addition, by integrally extruding the first and second pipe sections of the heat exchange integrated pipe or integrally extruding the first, second and third pipe sections, the heat exchange integrated pipe can be applied to various heat exchange facilities to improve heat exchange performance, while reducing the manufacturing cost and manufacturing time of the heat exchange integrated pipe, thereby providing an effect of improving the manufacturing performance of the heat exchange facility.

[0085] In addition, by simultaneously cutting the first and second pipe sections of the integrated heat exchange pipe to a predetermined size or simultaneously cutting the first, second and third pipe sections to a predetermined size, the integrated heat exchange pipe can be applied to heat exchange equipment of various sizes, thereby improving the applicability of the integrated heat exchange pipe.

[0086] In addition, by expanding and forming both ends of the first and second pipe sections of the integrated pipe for heat exchange together to a size of a predetermined ratio, or by expanding and forming both ends of the first, second and third pipe sections together to a size of a predetermined ratio, the processing performance of the expansion step is improved, and at the same time, the connection between the expanded pipe section and the connecting pipe is facilitated, thereby providing the effect of improving the sealing performance and connection performance between the expanded pipe section and the connecting pipe.

[0087] The present invention described above can be implemented in various other forms without departing from its technical spirit or essential characteristics. Therefore, the above embodiments are merely illustrative in all respects and should not be construed as limiting.

[0088] The present invention provides a method for manufacturing an integral heat exchange pipe for manufacturing an integral heat exchange pipe and an integral heat exchange pipe manufactured using the same.

Claims

1. A method for manufacturing an integral heat exchange pipe, comprising: An extrusion step in which the material is heated and an integral pipe for heat exchange is extruded; A first cutting step of cutting the integral heat exchange pipe extruded in the above extrusion step into an arbitrary length; A transfer step for transferring the integral heat exchange pipe cut in the first cutting step laterally; A cooling step for cooling the integrated heat exchange pipe transported in the above transport step; A second cutting step of cutting the integrated heat exchange pipe cooled in the above cooling step to a predetermined length; An expansion step for expanding both ends of the above-mentioned second-cut integral heat exchange pipe; and A method for manufacturing an integrated heat exchange pipe, characterized in that it comprises a discharge step of discharging the expanded integrated heat exchange pipe.

2. In paragraph 1, A method for manufacturing an integrated heat exchange pipe, characterized in that the above extrusion step integrally extrudes and molds the first pipe section (10) and the second pipe section (20) of the integrated heat exchange pipe.

3. In paragraph 1, A method for manufacturing an integrated heat exchange pipe, characterized in that the above extrusion step integrally extrudes the first pipe section (10), the second pipe section (20), and the third pipe section (30) of the integrated heat exchange pipe.

4. In paragraph 1, A method for manufacturing an integrated heat exchange pipe, characterized in that the second cutting step cuts both ends of the first pipe section (10) and the second pipe section (20) of the integrated heat exchange pipe to a predetermined size at the same time.

5. In paragraph 1, A method for manufacturing an integrated heat exchange pipe, characterized in that the second cutting step cuts both ends of the first pipe section (10), the second pipe section (20), and the third pipe section (30) of the integrated heat exchange pipe to a predetermined size at the same time.

6. In paragraph 1, A method for manufacturing an integrated heat exchange pipe, characterized in that the above expansion step expands the inner diameter of the first expansion pipe (12) of the first pipe section (10) of the integrated heat exchange pipe to be 1.05 to 1.50 times larger than the inner diameter size of the first pipe (11).

7. In paragraph 1, A method for manufacturing an integrated pipe for heat exchange, characterized in that the above expansion step is to expand the inner diameter of the second expansion pipe (22) of the second pipe section (20) of the integrated pipe for heat exchange to be 1.2 to 3.0 times larger than the inner diameter size of the second pipe (21), or to expand the inner diameter of the third expansion pipe (32) of the third pipe section (30) of the integrated pipe for heat exchange to be 1.2 to 3.0 times larger than the inner diameter size of the third pipe (31).

8. In paragraph 1, A method for manufacturing an integrated heat exchange pipe, characterized in that the above expansion step expands the first pipe section (10) and the second pipe section (20) of the integrated heat exchange pipe together, or expands the first pipe section (10), the second pipe section (20) and the third pipe section (30) of the integrated heat exchange pipe together.

9. An integrated heat exchange pipe characterized by being manufactured using the manufacturing method of the integrated heat exchange pipe described in Article 1.

10. In paragraph 9, The above integrated heat exchange pipe is characterized in that it is installed between the condenser and the evaporator of the refrigerator.

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