Heat exchanger machining method and heat exchanger

Abstract

The invention provides a heat exchanger machining method and a heat exchanger. The heat exchanger machining method comprises the steps that a steel pipe and an aluminum fin are cut, and a heat exchange pipe body and a fin body are obtained; the number of the fin bodies is multiple. Welding the heat exchange tube body and the plurality of fin bodies to form a heat exchange finned tube semi-finished product; wherein the heat exchange finned tube semi-finished product is provided with a plurality of fin parts at intervals, and a part to be bent is arranged between every two adjacent fin parts; bending the to-be-bent part to form a heat exchange finned tube; and the heat exchange finned tube and the rack main body are welded to form the heat exchanger. By means of the heat exchanger machining method, the structural stability of the heat exchanger is good.

Description

Technical Field

[0001] The present disclosure relates to the technical field of heat exchangers, and in particular to a heat exchanger processing method and a heat exchanger. Background Art

[0002] A heat exchanger is a heat exchange device used to transfer part of the heat of a hot fluid to a cold fluid, thereby achieving heat transfer. Heat exchangers are widely used in coating machines, chemical industry, petroleum industry, power systems, food industry, refrigeration systems and other fields. The heat exchanger is processed using the heat exchanger processing method.

[0003] The heat exchanger processing method of the related technology includes the following steps: S1, fins are set on the long U-tube to form a heat exchanger preform; S2, liquid aluminum is poured into the heat exchanger preform, and the liquid aluminum is used to realize the connection between the fins and the long U-tube in the preform; S3, the heat exchanger preform after pouring the liquid aluminum is dried to make a heat exchanger, such as the Chinese patent with patent number CN108061473B.

[0004] However, since liquid aluminum is used to achieve the connection between the fins and the long U-tubes in the preform, so that the liquid aluminum is used to act as an adhesive for the connection between the fins and the long U-tubes, the viscosity of the liquid aluminum is relatively low, so that the connection stability between the fins and the long U-tubes is relatively low. Afterwards, the heat exchanger preform after pouring the liquid aluminum is dried to form a heat exchanger, so that the liquid aluminum is dried to form aluminum, so that an aluminum layer is formed at the connection between the fins and the long U-tubes, and the viscosity of the aluminum layer is relatively low, so that the connection stability between the fins and the long U-tubes is relatively low, so that the fins are easier to fall off the long U-tubes, and the structural stability of the heat exchanger is relatively poor. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a heat exchanger processing method and a heat exchanger that have better structural stability.

[0006] The purpose of this disclosure is achieved through the following technical solutions:

[0007] A heat exchanger processing method, comprising:

[0008] The steel tube and the aluminum fin are cut respectively to obtain a heat exchange tube body and a fin body; wherein the number of the fin bodies is multiple;

[0009] The heat exchange tube body and the plurality of fin bodies are welded to form a semi-finished heat exchange fin tube; wherein the semi-finished heat exchange fin tube is provided with a plurality of fin parts at intervals, and a portion to be bent is provided between two adjacent fin parts;

[0010] Bending the portion to be bent to form a heat exchange fin tube;

[0011] The heat exchange fin tubes and the frame body are welded to form a heat exchanger.

[0012] In one embodiment, the steps of cutting the steel tube and the aluminum fins are as follows: cutting the steel tube and the aluminum fins are respectively performed using a laser cutting machine.

[0013] In one embodiment, the heat exchange tube body and the plurality of fin bodies are welded to form a semi-finished heat exchange fin tube, and the steps include: cleaning the heat exchange tube body and each of the fin bodies respectively; positioning the heat exchange tube body and the plurality of fin bodies; welding the heat exchange tube body and the plurality of fin bodies to form the semi-finished heat exchange fin tube.

[0014] In one of the embodiments, before the step of bending the portion to be bent, the heat exchanger processing method also includes: performing a desoldering treatment on the semi-finished heat exchange fin tube; performing a non-destructive testing treatment on the semi-finished heat exchange fin tube after desoldering; judging whether the semi-finished heat exchange fin tube is damaged; if so, judging that the semi-finished heat exchange fin tube is a defective semi-finished heat exchange fin tube; and repairing the defective semi-finished heat exchange fin tube.

[0015] In one embodiment, the step of bending the portion to be bent is specifically: bending the portion to be bent by using a bending device.

[0016] In one embodiment, the heat exchange fin tubes and the rack body are welded to form a heat exchanger, and the steps include: assembling the heat exchange fin tubes and the rack body; and welding the heat exchange fin tubes and the rack body to form the heat exchanger.

[0017] In one embodiment, after the step of welding the heat exchange fin tubes and the frame body to form a heat exchanger, the heat exchanger processing method further includes: performing an air tightness detection process on the heat exchanger.

[0018] In one embodiment, the step of performing air tightness detection on the heat exchanger includes: pressurizing the heat exchanger; maintaining pressure on the pressurized heat exchanger; determining whether there is leakage in the heat exchanger; if so, determining that the heat exchanger is a defective heat exchanger; and repairing the defective heat exchanger.

[0019] In one embodiment, the step of performing air tightness detection on the heat exchanger includes: pressurizing the heat exchanger; maintaining pressure on the pressurized heat exchanger; judging whether the heat exchanger has leakage; if not, judging that the heat exchanger has no leakage; judging whether the pressure inside the heat exchanger decreases; if not, judging that the heat exchanger is a qualified heat exchanger; draining and relieving pressure on the qualified heat exchanger; performing outbound detection on the qualified heat exchanger after draining and relieving pressure; and packaging the qualified heat exchanger after the outbound detection.

[0020] A heat exchanger is manufactured by using the heat exchanger manufacturing method described in any one of the above embodiments.

[0021] Compared with the prior art, the present invention has at least the following advantages:

[0022] The heat exchanger processing method disclosed in the present invention firstly cuts the steel tube and the aluminum fin respectively to obtain the heat exchange tube body and the fin body, that is, the steel tube is cut to obtain the heat exchange tube body, and the aluminum fin is cut to obtain a plurality of fin bodies; then, the heat exchange tube body and the plurality of fin bodies are welded to form a semi-finned heat exchange fin tube, so that the heat exchange tube body and each fin body are connected by welding, so that the connection strength between the heat exchange tube body and each fin body is high, so that the connection stability between the heat exchange tube body and each fin body is high, thereby solving the problem of low connection stability between the fin and the long U tube in the prior art, so that each fin body is welded during welding. It is difficult to fall off from the heat exchange tube body under the action of the heat exchange fin tube, so that the structural stability of the semi-finished heat exchange fin tube is better; then, the to-be-bent portion is bent to form a bent portion through the bending process, so that the semi-finished heat exchange fin tube forms a bent heat exchange fin tube, so that the structural stability of the heat exchange fin tube is better; then, the heat exchange fin tube and the frame body are welded to form a heat exchanger, so that the heat exchange fin tube and the frame body are connected by welding, so that the connection strength between the heat exchange fin tube and the frame body is higher, thereby making the connection stability between the heat exchange fin tube and the frame body higher, and thus making the structural stability of the heat exchanger better. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A flow chart of a heat exchanger processing method according to an embodiment;

[0025] Figure 2 is a schematic structural diagram of a heat exchanger according to an embodiment;

[0026] Figure 3 for Figure 2 A schematic diagram of the structure of the heat exchange fin tube of the heat exchanger shown;

[0027] Figure 4 It is a structural schematic diagram of a bending jig according to an embodiment;

[0028] Figure 5 This is a physical photo of the heat exchanger. DETAILED DESCRIPTION

[0029] In order to facilitate the understanding of the present disclosure, the present disclosure will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present disclosure are given in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present disclosure more thoroughly and comprehensively understood.

[0030] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0032] The present disclosure provides a heat exchanger processing method, comprising: cutting a steel tube and an aluminum fin respectively to obtain a heat exchange tube body and a fin body; wherein the number of the fin bodies is multiple; welding the heat exchange tube body and the multiple fin bodies to form a heat exchange fin tube semi-finished product; wherein the heat exchange fin tube semi-finished product is provided with multiple fin parts at intervals, and a part to be bent is provided between two adjacent fin parts; bending the part to be bent to form a heat exchange fin tube; welding the heat exchange fin tube and a frame body to form a heat exchanger.

[0033] The above heat exchanger processing method firstly cuts the steel tube and the aluminum fins respectively to obtain the heat exchange tube body and the fin body, that is, the steel tube is cut to obtain the heat exchange tube body, and the aluminum fins are cut to obtain a plurality of fin bodies; then, the heat exchange tube body and the plurality of fin bodies are welded to form a semi-finned heat exchange fin tube, so that the heat exchange tube body and each fin body are connected by welding, so that the connection strength between the heat exchange tube body and each fin body is high, so that the connection stability between the heat exchange tube body and each fin body is high, thereby solving the problem of low connection stability between the fin and the long U tube in the prior art, so that each fin body is welded. It is difficult to fall off from the heat exchange tube body under the action of the heat exchange fin tube, so that the structural stability of the semi-finished heat exchange fin tube is better; then, the to-be-bent portion is bent to form a bent portion through the bending process, so that the semi-finished heat exchange fin tube forms a bent heat exchange fin tube, so that the structural stability of the heat exchange fin tube is better; then, the heat exchange fin tube and the frame body are welded to form a heat exchanger, so that the heat exchange fin tube and the frame body are connected by welding, so that the connection strength between the heat exchange fin tube and the frame body is higher, thereby making the connection stability between the heat exchange fin tube and the frame body higher, and thus making the structural stability of the heat exchanger better.

[0034] In order to better understand the technical solutions and beneficial effects of the present invention, the present invention is further described in detail below in conjunction with specific embodiments:

[0035] like Figures 1 to 3 As shown, a heat exchanger processing method according to an embodiment is used to process a heat exchanger 20 .

[0036] Further, the heat exchanger processing method includes part or all of the following steps:

[0037] S101, cutting the steel tube and the aluminum fin respectively to obtain a heat exchange tube body 310 and a fin body 320; wherein the number of the fin body 320 is multiple.

[0038] In this embodiment, the steel tube and the aluminum fins are cut respectively to obtain the heat exchange tube body 310 and the fin body 320, that is, the steel tube is cut to obtain the heat exchange tube body 310 of a predetermined size, and the aluminum fins are cut to obtain multiple fin bodies 320 of predetermined sizes.

[0039] S103, welding the heat exchange tube body 310 and the plurality of fin bodies 320 to form a semi-finished heat exchange fin tube; wherein the semi-finished heat exchange fin tube is provided with a plurality of fin parts 321 at intervals, and a portion to be bent is provided between two adjacent fin parts 321.

[0040] In this embodiment, the heat exchange tube body 310 and the plurality of fin bodies 320 are welded to form a semi-finished heat exchange fin tube, so that the heat exchange tube body 310 and each fin body 320 are connected by welding, so that each fin body 320 is welded to the heat exchange tube body 310 to form a corresponding fin portion 321, so that the semi-finished heat exchange fin tube is provided with a plurality of fin portions 321 at intervals. Further, the steps of welding the heat exchange tube body 310 and the plurality of fin bodies 320 are specifically as follows: welding the assembly points of the heat exchange tube body 310 and each fin body 320 respectively along the circumferential direction of each fin body 320, so that each fin body 320 is reliably fixedly connected to the outer peripheral wall of the heat exchange tube body 310. In this embodiment, each fin body 320 is a spiral structure. The circumferential direction along each fin body 320 is the spiral circumferential direction along each fin body 320.

[0041] S105 , bending the portion to be bent to form a heat exchange fin tube 300 .

[0042] In this embodiment, the portion to be bent is subjected to a bending process, so that the portion to be bent is formed into a bent portion 311 , so that the semi-finished heat exchange fin tube forms a bent heat exchange fin tube 300 .

[0043] S107 , welding the heat exchange fin tube 300 and the frame body 200 to form a heat exchanger 20 .

[0044] In this embodiment, the heat exchange fin tube 300 and the rack body 200 are welded to form the heat exchanger 20, so that the heat exchange fin tube 300 and the rack body 200 are connected by welding, so that the connection strength between the heat exchange fin tube 300 and the rack body 200 is high. Further, the step of welding the heat exchange fin tube 300 and the rack body 200 is specifically: welding the assembly of the heat exchange tube body 310 and the rack body 200 along the circumferential direction of the heat exchange tube body 310 to achieve welding of the heat exchange fin tube 300 and the rack body 200.

[0045] In the above-mentioned heat exchanger processing method, firstly, the steel tube and the aluminum fin are cut respectively to obtain the heat exchange tube body 310 and the fin body 320, that is, the steel tube is cut to obtain the heat exchange tube body 310, and the aluminum fin is cut to obtain a plurality of fin bodies 320; then, the heat exchange tube body 310 and the plurality of fin bodies 320 are welded to form a semi-finished heat exchange fin tube, so that the heat exchange tube body 310 and each fin body 320 are connected by welding, so that the connection strength between the heat exchange tube body 310 and each fin body 320 is high, so that the connection stability between the heat exchange tube body 310 and each fin body 320 is high, thereby solving the problem of low connection stability between the fin and the long U tube in the prior art, so that each fin body 320 is welded during welding. The heat exchange fin tube 300 is difficult to fall off from the heat exchange tube body 310, so that the structural stability of the semi-finished heat exchange fin tube is better; then, the portion to be bent is bent to form a bent portion 311, so that the semi-finished heat exchange fin tube forms a bent heat exchange fin tube 300, so that the structural stability of the heat exchange fin tube 300 is better; then, the heat exchange fin tube 300 and the rack body 200 are welded to form the heat exchanger 20, so that the heat exchange fin tube 300 and the rack body 200 are connected by welding, so that the connection strength between the heat exchange fin tube 300 and the rack body 200 is higher, so that the connection stability between the heat exchange fin tube 300 and the rack body 200 is higher, and thus the structural stability of the heat exchanger 20 is better.

[0046] In one embodiment, the steps of cutting the steel tube and the aluminum fins are as follows: cutting the steel tube and the aluminum fins respectively by using a laser cutting machine. In this embodiment, the steel tube is cut by using a laser cutting machine to obtain a heat exchange tube body 310 of a predetermined size, so as to facilitate the forming of the heat exchange tube body 310; the aluminum fin is cut by using a laser cutting machine to obtain a plurality of fin bodies 320 of a predetermined size, so as to facilitate the forming of each fin body 320.

[0047] In one embodiment, the steps of welding the heat exchange tube body 310 and the plurality of fin bodies 320 to form a semi-finished heat exchange fin tube include: first, cleaning the heat exchange tube body 310 and each of the fin bodies 320, that is, cleaning the heat exchange tube body 310 to remove impurities adhered to the outer surface of the heat exchange tube body 310 to ensure the processing quality of subsequent welding, and cleaning each of the fin bodies 320 to remove impurities on each of the fin bodies 320 to facilitate subsequent welding; then, positioning the heat exchange tube body 310 and the plurality of fin bodies 320, positioning the plurality of fin bodies 320 on the heat exchange tube body 310 at intervals, so that The layout of the multiple fin bodies 320 on the heat exchange tube body 310 is reasonable; then, the heat exchange tube body 310 and the multiple fin bodies 320 are welded to form the heat exchange fin tube semi-finished product, that is, each fin body 320 and the heat exchange tube body 310 after positioning are welded to form a fin portion 321, and the multiple fin portions 321 are arranged at intervals, and the multiple fin bodies 320 do not completely cover the heat exchange tube body 310, so that part of the heat exchange tube body 310 (that is, the portion to be bent) is exposed between two adjacent fin portions 321, so that a portion to be bent is arranged between two adjacent fin portions 321, so as to facilitate the subsequent bending process of the heat exchange fin tube semi-finished product, thereby making the heat exchange fin tube 300 more convenient to manufacture.

[0048] In one embodiment, before the step of bending the portion to be bent, the heat exchanger processing method further includes: first, performing a desoldering treatment on the semi-finished heat exchange fin tube to facilitate subsequent non-destructive testing; then, performing a non-destructive testing on the semi-finished heat exchange fin tube after desoldering to confirm whether the semi-finished heat exchange fin tube is damaged, ensure the qualified rate of the semi-finished heat exchange fin tube, and improve the production quality of the heat exchanger 20; then, judging whether the semi-finished heat exchange fin tube is damaged; then, if so, judging that the semi-finished heat exchange fin tube is a defective semi-finished heat exchange fin tube; then, repairing the defective semi-finished heat exchange fin tube Processing, that is, repairing the welding parts of the defective heat exchange fin tube semi-finished products to compensate for the damage, obtaining the heat exchange fin tube semi-finished products, improving the utilization rate of the heat exchange fin tube semi-finished products, and reducing the production cost of the heat exchanger 20; then, performing a second desoldering treatment on the repaired heat exchange fin tube semi-finished products; then, performing a second non-destructive testing treatment on the repaired heat exchange fin tube semi-finished products; then, judging whether the repaired heat exchange fin tube semi-finished products are damaged; if so, judging that the heat exchange fin tube semi-finished products are waste heat exchange fin tube semi-finished products, and scrapping the waste heat exchange fin tube semi-finished products, so that the quality of the heat exchange fin tube semi-finished products is better controlled, and the production quality of the heat exchanger 20 is improved.

[0049] Furthermore, in one of the embodiments, before the step of bending the portion to be bent, the heat exchanger processing method also includes: first, performing a desoldering treatment on the semi-finished heat exchange fin tube to facilitate subsequent non-destructive testing; thereafter, performing a non-destructive testing on the semi-finished heat exchange fin tube after desoldering to confirm whether the semi-finished heat exchange fin tube is damaged, ensure the qualified rate of the semi-finished heat exchange fin tube, and improve the production quality of the heat exchanger 20; thereafter, judging whether the semi-finished heat exchange fin tube is damaged; thereafter, if not, judging the semi-finished heat exchange fin tube to be a qualified semi-finished heat exchange fin tube to ensure the production quality of the heat exchanger 20.

[0050] Furthermore, in one of the embodiments, before the step of bending the portion to be bent, the heat exchanger processing method further includes: first, performing a desoldering treatment on the semi-finished heat exchange fin tube to facilitate subsequent non-destructive testing; then, performing a non-destructive testing on the semi-finished heat exchange fin tube after desoldering to confirm whether the semi-finished heat exchange fin tube is damaged, ensure the qualified rate of the semi-finished heat exchange fin tube, and improve the production quality of the heat exchanger 20; then, judging whether the semi-finished heat exchange fin tube is damaged; then, if so, judging the semi-finished heat exchange fin tube to be a defective semi-finished heat exchange fin tube; then, The defective heat exchange fin tube semi-finished products are repaired, that is, the welding parts of the defective heat exchange fin tube semi-finished products are repaired to compensate for the damage, so as to obtain the heat exchange fin tube semi-finished products, improve the utilization rate of the heat exchange fin tube semi-finished products, and reduce the production cost of the heat exchanger 20; then, the repaired heat exchange fin tube semi-finished products are subjected to a second desoldering treatment; then, the repaired heat exchange fin tube semi-finished products are subjected to a second non-destructive testing treatment; then, it is determined whether the repaired heat exchange fin tube semi-finished products are damaged; if not, the heat exchange fin tube semi-finished products are determined to be qualified heat exchange fin tube semi-finished products to ensure the production quality of the heat exchanger 20.

[0051] Furthermore, in one of the embodiments, the step of determining whether the heat exchange fin tube semi-finished product is damaged includes: first, using a CCD camera to capture images of the heat exchange fin tube semi-finished product to obtain object image data of the heat exchange fin tube semi-finished product; then, using a CCD camera to capture images of qualified heat exchange fin tube semi-finished products to obtain reference image data; then, comparing the object image data with the reference image data to determine whether the heat exchange fin tube semi-finished product is damaged; if so, it is determined to be a defective heat exchange fin tube semi-finished product, and then, it is repaired; if not, it is determined to be a qualified heat exchange fin tube semi-finished product, and then, it is bent. Compared with manual visual judgment, the damage detection accuracy of the heat exchange fin tube semi-finished product is improved, so that the production quality of the heat exchanger is better.

[0052] Furthermore, in one of the embodiments, the step of comparing the object image data with the reference image data is specifically: performing image difference comparison processing on the object image data of the heat exchange fin tube semi-finished product and the reference image data, so as to make the damage detection of the heat exchange fin tube semi-finished product more efficient.

[0053] In one embodiment, the step of bending the portion to be bent is specifically: using a bending device to bend the portion to be bent. In this embodiment, the bending device is a bending machine, and the bending device bends the portion to be bent to form a bent portion 311, so as to facilitate the forming of the heat exchange fin tube 300.

[0054] Furthermore, if Figure 4 As shown, in one embodiment, the bending device includes a bending fixture 40, and the bending fixture 40 includes a guide rod 500, a support plate 600, a fastening assembly 700, a first fixing plate 800 and a second fixing plate 900; the guide rod 500 is fixedly connected to the swing arm of the bending device; the support plate 600 is provided with a first through hole 610; the fastening assembly 700 is connected to the support plate 600, and the fastening assembly 700 is provided with a second through hole (not shown in the figure), and the guide rod 500 is respectively penetrated through the first through hole 610 and the second through hole; the first fixing plate 800 is fixed to one side of the support plate 600, the first fixing plate 800 is arranged above the first through hole, and the first fixing plate 800 is provided with a first tilting Inclined surface 810, a first fixing column 811 is vertically arranged on the first inclined surface 810; the second fixing plate 900 is arranged parallel to the first fixing plate 800, the second fixing plate 900 is located above the first fixing plate 800, the second fixing plate 900 is provided with a second inclined surface 910, the second inclined surface 910 is arranged parallel to the first inclined surface 810, a second fixing column 911 is vertically arranged on a side of the second fixing plate 900 facing away from the first fixing plate 800, the axial direction of the first fixing column 811 and the axial direction of the second fixing column 911 are both arranged parallel to the supporting plate 600, and the distance between the first fixing column 811 and the supporting plate 600 is smaller than the distance between the second fixing column 911 and the supporting plate 600.

[0055] In this embodiment, the bending jig 40 ensures that the length of the straight tube section formed by each bend is consistent by arranging the second fixing column 911 and the first fixing column 811 in front and behind each other, thereby ensuring that each straight tube section after bending meets the assembly requirements, thereby improving the assembly efficiency. In addition, during the bending process, the bending device and the bending jig 40 cooperate to support both ends of the heat exchange tube body 310 to prevent the heat exchange tube body 310 from tilting during the bending process, further improving the bending accuracy.

[0056] During a single bend, the fixing position of the bending jig 40 on the guide rod 500 can be adjusted by the fastening assembly 700, thereby ensuring the length of the straight tube section of the heat exchange fin tube 300. During the bending process, the end of the heat exchange tube body 310 abuts against the first fixing column 811, ensuring the accuracy of the initial bending position and improving the bending accuracy. At the same time, the second fixing plate 900 provides further positioning for the heat exchange tube body 310, preventing the heat exchange tube body 310 from tilting or detaching from the bending jig, further improving the bending accuracy.

[0057] During the secondary bending process, the second fixing column 911 provides angle guidance to ensure that the angles between the various bending parts of the bent heat exchange fin tube 300 meet the assembly requirements. Specifically, when processing the second portion to be bent, the first bending portion is hooked on the second fixing column 911 to ensure that the angle between the first bending portion and the horizontal ground is the inclination angle of the second inclined surface 910, that is, the preset bending angle, and so on, the same operation is performed on the subsequent portions to be bent to meet the assembly standards of the heat exchanger 10. In addition, during the bending process, the second fixing column 911 cooperates with the support plate 600 to provide axial limitation for the heat exchange tube body 310 to prevent the heat exchange tube body 310 from axial displacement.

[0058] In one embodiment, the heat exchange fin tube 300 and the rack body 200 are welded to form the heat exchanger 20, and the steps include: first, assembling the heat exchange fin tube 300 and the rack body 200, inserting the heat exchange fin tube 300 into the corresponding welding fixing hole and assembling it with the rack body 200, so as to facilitate the subsequent welding process; then, welding the heat exchange fin tube 300 and the rack body 200 to form the heat exchanger 20, so that the heat exchange fin tube 300 and the rack body 200 are connected by welding, so that the connection strength between the heat exchange fin tube 300 and the rack body 200 is higher, so that the connection stability between the heat exchange fin tube 300 and the rack body 200 is higher, and then the structural stability of the heat exchanger 20 is better.

[0059] In one of the embodiments, after the step of welding the heat exchange fin tube 300 and the rack body 200 to form the heat exchanger 20, the heat exchanger processing method further includes: performing an air tightness detection process on the heat exchanger 20 to confirm whether there is an air leakage problem in the heat exchanger 20, ensuring the air tightness of the heat exchanger 20, so that the heat exchange effect of the heat exchanger 20 is better.

[0060] In one embodiment, the step of performing air tightness detection on the heat exchanger 20 includes: first, performing pressure treatment on the heat exchanger 20, using a pressure machine to perform pressure treatment on the heat exchanger 20, that is, the pressure machine is connected to the water pump through a pipeline, and the pressure machine is connected to the air inlet of the heat exchanger 20. At this time, the air outlet of the heat exchanger 20 is in an open state, and the water pump and the pressure machine are started at the same time, and clean water is injected into the heat exchanger 20. After the clean water fills the heat exchanger 20, the pressure slowly rises to a predetermined value, and the predetermined pressure value is 40-50kg / cm 2 ; At this time, close the exhaust valve of the air outlet to seal the air outlet, stop the press at the same time, and close the air inlet valve of the air inlet to seal the air inlet; then, perform a pressure-maintaining treatment on the pressurized heat exchanger 20 to keep the pressure inside the heat exchanger 20 constant, and the pressure-maintaining time is 120 minutes; then, determine whether the heat exchanger 20 has leakage, that is, observe whether the weld has leakage and observe whether the connection has leakage; then, if yes, determine that the heat exchanger 10 is a defective product The heat exchanger 20 is judged to be unqualified in the air tightness test, and the heat exchanger 20 is a defective heat exchanger; then, the defective heat exchanger 20 is repaired, that is, the leaking part of the defective heat exchanger is repaired by welding to make up for the leakage, thereby obtaining the heat exchanger 10, improving the utilization rate of the heat exchanger 20, and reducing the production cost of the heat exchanger 20; then, the repaired heat exchanger 20 is subjected to a secondary pressure treatment, and when the internal pressure of the heat exchanger 20 is 43kg / cm 2 At the same time, install the first pressure gauge at the outlet to obtain the pressure value of the outlet. The pressure value of the outlet is C1 = 43kg / cm 2 , install a second pressure gauge at the air inlet to obtain the pressure value of the air inlet, the pressure value of the air inlet is J1 = 43kg / cm 2 , meeting the test requirements, at this time, close the exhaust valve of the air outlet to seal the air outlet, stop the press machine at the same time, and close the air inlet valve of the air inlet to seal the air inlet; then, perform a second pressure-maintaining treatment on the heat exchanger 20 after the second pressurization to keep the pressure inside the heat exchanger 20 unchanged, that is, the pressure inside the heat exchanger 20 is 43kg / cm 2, the pressure holding time is 120 minutes, and the value of the first pressure gauge is obtained every 30 minutes, which are C2, C3, C4, and C5 respectively; at the same time, the value of the second pressure gauge is obtained every 30 minutes, which are J2, J3, J4, and J5 respectively; then, it is judged whether the repaired heat exchanger 20 has leakage, that is, whether the weld has leakage and whether the connection has leakage; then, if not, it is judged that the heat exchanger 20 has no leakage problem. At this time, it is judged whether the pressure inside the heat exchanger 20 drops, and C1 is compared with C2, C3, C4 and C5 respectively. When C1=C2=C3=C4=C5, it is judged that the outlet pressure has not dropped. At the same time, J1 is respectively Compared with J2, J3, J4 and J5, when J1=J2=J3=J4=J5, it is judged that the air inlet pressure has not dropped, and when the pressures of the air outlet and the air inlet have not dropped, it is judged that the pressure inside the heat exchanger 20 has not dropped, and it is judged that the air tightness test of the heat exchanger 20 is qualified, and the heat exchanger 20 is a qualified heat exchanger. The heat exchanger 20 is drained and pressure-relieved to facilitate subsequent processing of the heat exchanger 20; thereafter, the heat exchanger 20 is subjected to a warehouse-out inspection to confirm whether the appearance quality of the heat exchanger 20 is qualified and to ensure the appearance quality of the heat exchanger 20; thereafter, the heat exchanger 20 after the warehouse-out inspection is packaged to complete the warehouse-out of the heat exchanger 20.

[0061] In one embodiment, the step of performing air tightness detection on the heat exchanger 20 includes: first, performing pressure treatment on the heat exchanger 20, using a pressure machine to perform pressure treatment on the heat exchanger 20, that is, the pressure machine is connected to the water pump through a pipeline, and the pressure machine is connected to the air inlet of the heat exchanger 20. At this time, the air outlet of the heat exchanger 20 is in an open state, and the water pump and the pressure machine are started at the same time, and clean water is injected into the heat exchanger 20. After the clean water fills the heat exchanger 20, the pressure slowly rises to a predetermined value, and the predetermined pressure value is 40-50kg / cm 2 ; When the internal pressure of the heat exchanger 20 is 43kg / cm 2 At the same time, install the first pressure gauge at the outlet to obtain the pressure value of the outlet. The pressure value of the outlet is C1 = 43kg / cm 2 , install a second pressure gauge at the air inlet to obtain the pressure value of the air inlet, the pressure value of the air inlet is J1 = 43kg / cm 2 , meeting the test requirements, at this time, close the exhaust valve of the air outlet to seal the air outlet, stop the press at the same time, and close the air inlet valve of the air inlet to seal the air inlet; then, perform a pressure-maintaining treatment on the pressurized heat exchanger 20 to keep the pressure inside the heat exchanger 20 unchanged, that is, the pressure inside the heat exchanger 20 is 43kg / cm 2, the pressure holding time is 120 minutes, and the value of the first pressure gauge is obtained every 30 minutes, which are C2, C3, C4, and C5 respectively; at the same time, the value of the second pressure gauge is obtained every 30 minutes, which are J2, J3, J4, and J5 respectively; then, it is judged whether the heat exchanger 20 has leakage, that is, whether the weld has leakage and whether the connection has leakage; then, if not, it is judged that the heat exchanger 20 has no leakage problem; then, it is judged whether the pressure inside the heat exchanger 20 drops, and C1 is compared with C2, C3, C4 and C5 respectively. When C1=C2=C3=C4=C5, it is judged that the outlet pressure has not dropped. At the same time, J1 is compared with J2, J3, J4 and J5 respectively. When J1=J2=J3=J4=J5, it is judged that the pressure at the air inlet has not dropped, and when the pressure at both the air outlet and the air inlet has not dropped, it is judged that the pressure inside the heat exchanger 20 has not dropped; if not, the heat exchanger is judged to be a qualified heat exchanger, that is, it is judged that the air tightness test of the heat exchanger 20 is qualified, and the heat exchanger 20 is a qualified heat exchanger; then, the qualified heat exchanger is drained and pressure-relieved for subsequent processing of the heat exchanger 20; then, the qualified heat exchanger after draining and pressure-relief is subjected to a warehouse-out inspection to confirm whether the appearance quality of the heat exchanger 20 is qualified and to ensure the appearance quality of the heat exchanger 20; then, the qualified heat exchanger after the warehouse-out inspection is packaged to complete the delivery of the heat exchanger 20.

[0062] Further, in one embodiment, the step of performing air tightness detection on the heat exchanger 20 includes: first, performing pressure treatment on the heat exchanger 20, using a pressure machine to perform pressure treatment on the heat exchanger 20, that is, the pressure machine is connected to the water pump through a pipeline, and the pressure machine is connected to the air inlet of the heat exchanger 20. At this time, the air outlet of the heat exchanger 20 is in an open state, and the water pump and the pressure machine are started at the same time, and clean water is injected into the heat exchanger 20. After the clean water fills the heat exchanger 20, the pressure slowly rises to a predetermined value, and the predetermined pressure value is 40-50kg / cm 2; At this time, close the exhaust valve of the air outlet to seal the air outlet, stop the press at the same time, and close the air inlet valve of the air inlet to seal the air inlet; then, perform a pressure-maintaining treatment on the pressurized heat exchanger 20 to keep the pressure inside the heat exchanger 20 constant for 120 minutes; then, determine whether the heat exchanger 20 has leakage, that is, observe whether the weld has leakage and whether the connection has leakage; then, if yes, determine that the heat exchanger 10 is a defective heat exchanger, that is, determine whether the gas of the heat exchanger 20 is defective. If the tightness test fails, the heat exchanger 20 is a defective heat exchanger; then, the heat exchanger 20 is repaired, that is, the leaking part of the defective heat exchanger is repaired by welding to make up for the leakage, so as to obtain the heat exchanger 10, improve the utilization rate of the heat exchanger 20, and reduce the production cost of the heat exchanger 20; then, the repaired heat exchanger 20 is subjected to secondary pressure treatment, and clean water is injected into the heat exchanger 20. After the clean water fills the heat exchanger 20, the pressure slowly rises to a predetermined value, and the predetermined pressure value is 40-50kg / cm 2 ; At this time, close the exhaust valve of the air outlet to seal the air outlet, stop the press at the same time, and close the air inlet valve of the air inlet to seal the air inlet; then, perform a second pressure holding treatment on the heat exchanger 20 after the second pressurization to keep the pressure inside the heat exchanger 20 unchanged, and the pressure holding time is 120 minutes; then, judge whether there is leakage in the repaired heat exchanger 20, that is, observe whether there is leakage in the weld and observe whether there is leakage in the connection; then, if so, judge that the heat exchanger 10 is a waste heat exchanger, that is, judge that the air tightness test of the repaired heat exchanger 20 is still unqualified, and the heat exchanger 20 is a waste heat exchanger, and it is scrapped, so that the quality of the heat exchanger 20 is better controlled and the production quality of the heat exchanger 20 is improved.

[0063] Furthermore, in one of the embodiments, the steps of draining and relieving pressure of the heat exchanger 20 include: first, removing the first pressure gauge to facilitate the subsequent draining and pressure relief of the air outlet; removing the second pressure gauge to facilitate the subsequent draining and pressure relief of the air inlet; opening the exhaust valve and the air inlet valve at the same time, opening the exhaust valve to open the air outlet to facilitate the outflow of clean water, opening the air inlet valve to open the air inlet to facilitate the outflow of clean water and the draining and pressure relief of the heat exchanger 20; drying the heat exchanger 20, using an air compressor to dry the heat exchanger 20, so that the gas blown out by the air compressor is used to dry the inner surface of the heat exchanger 20, so that the heat exchanger 20 is more dry.

[0064] Furthermore, in one embodiment, the steps of performing outbound inspection on the heat exchanger 20 include: firstly, performing a vibration test on the heat exchanger 20 to help the staff to timely discover the abnormal vibration of the heat exchanger 20, prevent the occurrence of potential failures, and improve the use quality of the heat exchanger 20; then, cleaning the heat exchanger 20 after vibration, using a high-pressure air pipe to clean the debris on the surface of the heat exchanger 20, so that the heat exchanger 20 is more tidy; performing an appearance quality inspection on the cleaned heat exchanger 20 to ensure that the appearance quality of the heat exchanger 20 meets the following requirements:

[0065] 1. The fin body 320 is tightly connected to the heat exchange tube body 310, the fin body 320 is neat, the fin spacing is uniform, there are no defects such as burrs, cracks, curling, etc., and the fin body 320 is clean without aluminum chips and white spots;

[0066] 2. The inner and outer surfaces of the heat exchanger 20 are clean and free of oil marks;

[0067] 3. The sheet metal edge of the heat exchanger 20 is smooth and burr-free;

[0068] 4. The heat exchanger 20 should not be tilted diagonally, and the right angle of the enclosure should fit the column completely;

[0069] 5. The welding is firm and smooth, without defects such as overburning, cracks, pores, etc. The weld is beautiful, spatter is removed after welding, and there are no scratches on the surface;

[0070] 6. The elbow of heat exchanger 20 has no obvious wrinkles and deformation;

[0071] 7. There is no obvious mold or iron filings in the small tube, and the glass glue is beautiful;

[0072] When the appearance quality of the heat exchanger 20 meets the above requirements, it is determined that the appearance quality of the heat exchanger 20 is qualified and meets the conditions for delivery. The heat exchanger 20 that meets the conditions is packaged and the heat exchanger 20 is delivered, so that the appearance quality of the heat exchanger 20 is high.

[0073] Furthermore, the step of performing appearance quality inspection on the cleaned heat exchanger 20 is specifically as follows: using a CCD camera to collect images of the cleaned heat exchanger 20 to obtain actual image data of the heat exchanger 20; comparing the actual image data of the heat exchanger 20 with the target image data to determine whether the appearance of the heat exchanger 20 is abnormal; if so, matching the actual image data of the heat exchanger 20 with the image data in the image database of the heat exchanger 20 to determine the abnormal situation of the appearance of the heat exchanger 20, which greatly improves the appearance quality inspection efficiency of the heat exchanger 20 compared to the manual naked eye judgment. In this embodiment, before the step of performing appearance quality inspection on the cleaned heat exchanger 20, the step of performing outbound inspection on the heat exchanger 20 also includes: establishing an image database in which multiple abnormal situations of the heat exchanger 20 correspond to multiple image data of the heat exchanger 20, thereby improving the applicability of outbound inspection of the heat exchanger 20. Furthermore, the step of comparing the actual image data of the heat exchanger 20 with the target image data is specifically as follows: performing image difference processing on the actual image data of the heat exchanger 20 and the target image data, so as to make the outbound inspection of the heat exchanger 20 more efficient and accurate and reduce the labor intensity of manual work.

[0074] Further, in one of the embodiments, the step of performing air tightness detection on the heat exchanger 20 includes: firstly, performing pressure treatment on the heat exchanger 20, using a pressure machine to perform pressure treatment on the heat exchanger 20, that is, the pressure machine is connected to the water pump through a pipeline, and the pressure machine is connected to the air inlet of the heat exchanger 20. At this time, the air outlet of the heat exchanger 20 is in an open state, and the water pump and the pressure machine are started at the same time, and clean water is injected into the heat exchanger 20. After the clean water fills the heat exchanger 20, the pressure slowly rises to a predetermined value, and the predetermined pressure value is 40-50kg / cm 2 If the pressure is too high, the welding points of the welding parts are prone to failure, and the heat exchanger 10 is easily scrapped; if the pressure is too low, the pressure detection accuracy of the heat exchanger 10 is poor; when the internal pressure of the heat exchanger 20 is 43kg / cm 2 At the same time, install the first pressure gauge at the outlet to obtain the pressure value of the outlet. The pressure value of the outlet is C1 = 43kg / cm 2 , install a second pressure gauge at the air inlet to obtain the pressure value of the air inlet, the pressure value of the air inlet is J1 = 43kg / cm 2 , meeting the test requirements, at this time, close the exhaust valve of the air outlet to seal the air outlet, stop the press at the same time, and close the air inlet valve of the air inlet to seal the air inlet; then, perform a pressure-maintaining treatment on the pressurized heat exchanger 20 to keep the pressure inside the heat exchanger 20 unchanged, that is, the pressure inside the heat exchanger 20 is 43kg / cm 2, the pressure holding time is 120 minutes, and the value of the first pressure gauge is obtained every 30 minutes, which are C2, C3, C4, and C5 respectively; at the same time, the value of the second pressure gauge is obtained every 30 minutes, which are J2, J3, J4, and J5 respectively; then, it is judged whether the heat exchanger 20 has leakage, that is, whether the weld has leakage and whether the connection has leakage; then, if not, it is judged that the heat exchanger 20 has no leakage problem; then, it is judged whether the pressure inside the heat exchanger 20 decreases, and C1 is compared with C2, C3, C4 and C5 respectively. When C1>C2>C3>C4>C5, it is judged that the outlet pressure decreases, and C1-C5<1kg / cm 2 At the same time, J1 is compared with J2, J3, J4 and J5 respectively. When J1>J2>J3>J4>J5, it is judged that the inlet pressure decreases, J1-J5<1kg / cm 2 ; It indicates that the pressure drop at the air outlet and the air inlet tends to be consistent, and it is judged that the pressure inside the heat exchanger 20 has not dropped.

[0075] When C1-C5≥1kg / cm 2 , and J1-J5≥1kg / cm 2 At this time, it is impossible to determine whether the pressure inside the heat exchanger 20 decreases;

[0076] Afterwards, the heat exchanger 20 is pressurized. When the internal pressure of the heat exchanger 20 is 48 kg / cm 2 At the same time, install the first pressure gauge at the outlet to obtain the pressure value of the outlet. The pressure value of the outlet is C6 = 48kg / cm 2 , install a second pressure gauge at the air inlet to obtain the pressure value of the air inlet, the pressure value of the air inlet is J6 = 48kg / cm 2 , meeting the test requirements, at this time, close the exhaust valve of the air outlet to seal the air outlet, stop the pressurizing machine at the same time, and close the air inlet valve of the air inlet to seal the air inlet; then, perform a second pressure-maintaining treatment on the pressurized heat exchanger 20 to keep the pressure inside the heat exchanger 20 unchanged, that is, the pressure inside the heat exchanger 20 is 48kg / cm 2 , the pressure holding time is 120 minutes, and the values ​​of the first pressure gauge are obtained every 30 minutes, which are C7, C8, C9, and C10 respectively; at the same time, the values ​​of the second pressure gauge are obtained every 30 minutes, which are J7, J8, J9, and J10 respectively; then, C6 is compared with C7, C8, C9, and C10 respectively. When C6>C7>C8>C9>C10, it is judged that the outlet pressure decreases, and C6-C10<1kg / cm 2At the same time, J6 is compared with J7, J8, J9 and J10 respectively. When J6>J7>J8>J9>J10, it is judged that the inlet pressure decreases, J6-J10<1kg / cm 2 ; It means that after the heat exchanger 20 is pressurized, the pressure drop at the air outlet and the air inlet is still consistent, and it is judged that the pressure inside the heat exchanger 20 has not dropped. Therefore, that is to say, if not, it is judged that the air tightness test of the heat exchanger 20 is qualified, and the heat exchanger 20 is a qualified product; then, the heat exchanger 20 is drained and pressure-released to facilitate the subsequent processing of the heat exchanger 20; then, the heat exchanger 20 after draining and pressure-releasing is subjected to a warehouse inspection process to confirm whether the appearance quality of the heat exchanger 20 is qualified and ensure the appearance quality of the heat exchanger 20; then, the heat exchanger 20 after the warehouse inspection is packaged to complete the warehouse delivery of the heat exchanger 20.

[0077] Further, in one embodiment, when C6-C10≥1kg / cm 2 , and J6-J10≥1kg / cm 2 When the air tightness test of the heat exchanger 20 after repair is judged to be unqualified, the heat exchanger 20 is scrapped and the quality of the heat exchanger 20 is better controlled, thereby improving the production quality of the heat exchanger 20.

[0078] The present disclosure further provides a heat exchanger 20, which is manufactured using the heat exchanger processing method of any of the above embodiments.

[0079] Compared with the prior art, the present invention has at least the following advantages:

[0080] The heat exchanger processing method disclosed in the present invention firstly cuts the steel tube and the aluminum fins respectively to obtain the heat exchange tube body 310 and the fin body 320, that is, the steel tube is cut to obtain the heat exchange tube body 310, and the aluminum fins are cut to obtain a plurality of fin bodies 320; then, the heat exchange tube body 310 and the plurality of fin bodies 320 are welded to form a semi-finished heat exchange fin tube, so that the heat exchange tube body 310 and each fin body 320 are connected by welding, so that the connection strength between the heat exchange tube body 310 and each fin body 320 is high, so that the connection stability between the heat exchange tube body 310 and each fin body 320 is high, thereby solving the problem of low connection stability between the fin and the long U tube in the prior art, so that each fin body 320 is welded. Afterwards, the heat exchange fin tube 300 is welded to the frame body 200 to form the heat exchange fin tube 300, so that the heat exchange fin tube 300 has better structural stability.

[0081] The above-mentioned embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the disclosed patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the disclosed patent shall be subject to the attached claims.

Claims

1. A heat exchanger processing method, characterized in that: include: The steel tube and the aluminum fin are cut respectively to obtain a heat exchange tube body and a fin body; wherein the number of the fin bodies is multiple; The heat exchange tube body and the plurality of fin bodies are welded to form a semi-finished heat exchange fin tube; wherein the semi-finished heat exchange fin tube is provided with a plurality of fin parts at intervals, and a portion to be bent is provided between two adjacent fin parts; Bending the portion to be bent to form a heat exchange fin tube; The heat exchange fin tubes and the frame body are welded to form a heat exchanger.

2. The heat exchanger processing method according to claim 1, characterized in that: The specific steps for cutting the steel tube and the aluminum fin are as follows: The steel tube and aluminum fin are cut separately using a laser cutting machine.

3. The heat exchanger processing method according to claim 1, characterized in that: The steps of welding the heat exchange tube body and the plurality of fin bodies to form a semi-finished heat exchange fin tube include: Cleaning the heat exchange tube body and each of the fin bodies respectively; Positioning the heat exchange tube body and the plurality of fin bodies; The heat exchange tube body and the plurality of fin bodies are welded to form the heat exchange fin tube semi-finished product.

4. The heat exchanger processing method according to claim 1, characterized in that: Before the step of bending the portion to be bent, the heat exchanger processing method further includes: Performing a desoldering treatment on the semi-finished heat exchange fin tube; Performing nondestructive testing on the semi-finished heat exchange fin tube after desoldering; Determining whether the heat exchange fin tube semi-finished product is damaged; If yes, the semi-finished heat exchange fin tube is judged to be a defective semi-finished heat exchange fin tube; The defective heat exchange fin tube semi-finished product is repaired.

5. The heat exchanger processing method according to claim 1, characterized in that: The specific steps of bending the portion to be bent are: A bending device is used to perform bending processing on the portion to be bent.

6. The heat exchanger processing method according to claim 1, characterized in that: The steps of welding the heat exchange fin tubes and the frame body to form a heat exchanger include: Assembling the heat exchange fin tubes and the frame body; The heat exchange fin tubes and the frame body are welded to form the heat exchanger.

7. The heat exchanger processing method according to claim 1, characterized in that: After the step of welding the heat exchange fin tubes and the frame body to form a heat exchanger, the heat exchanger processing method further includes: The heat exchanger is subjected to air tightness detection.

8. The heat exchanger processing method according to claim 7, characterized in that: The step of performing air tightness detection on the heat exchanger comprises: Performing a pressure treatment on the heat exchanger; Performing pressure-maintaining treatment on the pressurized heat exchanger; Determining whether the heat exchanger has leakage; If yes, the heat exchanger is judged to be a defective heat exchanger; The defective heat exchanger is repaired.

9. The heat exchanger processing method according to claim 7, characterized in that: The step of performing air tightness detection on the heat exchanger comprises: Performing a pressure treatment on the heat exchanger; Performing pressure-maintaining treatment on the pressurized heat exchanger; Determining whether the heat exchanger has leakage; If not, it is determined that the heat exchanger has no leakage problem; Determining whether the pressure inside the heat exchanger decreases; If not, the heat exchanger is judged to be a qualified heat exchanger; Performing water-draining and pressure-relieving treatment on the qualified heat exchanger; Conducting outbound inspection on the qualified heat exchanger after draining and depressurizing; The qualified heat exchangers after the warehouse inspection are packaged.

10. A heat exchanger, characterized in that: The heat exchanger is obtained by processing using the heat exchanger processing method described in any one of claims 1 to 9.

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