Finned tube and fin connecting structure and heat exchanger made of finned tube and fin connecting structure

Abstract

The utility model belongs to the technical field of cold chains, and particularly relates to a finned tube and fin connecting structure and a heat exchanger made of the finned tube and fin connecting structure, the finned tube and fin connecting structure comprises a finned tube and fins which are made of stainless steel materials, the fins are symmetrically welded on two sides of the finned tube, and the fins are welded on two sides of the finned tube. One side, far away from the finned tube, of each fin is provided with a circular back bend or a U-shaped back bend for preventing a sharp edge from cutting personnel; or the side, far away from the finned tube, of the fin on one side is provided with a round back bend or a U-shaped back bend for preventing the sharp edge from cutting personnel, and the side, far away from the finned tube, of the fin on the other side is provided with a water receiving groove. The aluminum alloy has the advantages of good mechanical property, high corrosion resistance, low cost and high strength.

Description

TECHNICAL FIELD

[0001] The utility model belongs to cold chain technical field, especially relate to a finned tube and fin connecting structure and heat exchanger made of it. BACKGROUND

[0002] Traditional heat exchanger adopts aluminum material whole extrusion forming, its shortcoming lies in:

[0003] 1. poor mechanical property: due to its material property, the strength of extruded aluminum alloy pipe is relatively low, and deformation or fracture phenomenon is easy to occur when bearing larger load.

[0004] 2. poor corrosion resistance: the chemical property of aluminum is relatively active, and a thin oxide film is easy to be generated by oxidation, the thin oxide film can play certain protection function, but is still difficult to resist corrosion erosion under certain environment (such as humid environment). In addition, if the surface treatment is improper or maintenance is not in time, the rust problem of metal surface is also easy to aggravate.

[0005] 3. extrusion forming equipment is expensive, and process is difficult to control, especially temperature control difficulty is high, causing high rate of defective products, production cost increase, material waste and other problems.

[0006] 4. extrusion forming aluminum material cost is high. SUMMARY

[0007] The utility model discloses a kind of finned tube and fin connecting structure and heat exchanger made of it, which has good mechanical property, strong corrosion resistance, low cost and high strength.

[0008] The utility model discloses a kind of finned tube and fin connecting structure and heat exchanger made of it, which has good mechanical property, strong corrosion resistance, low cost and high strength.

[0009] A kind of finned tube and fin connecting structure, including finned tube and fin made of stainless steel material, the fin of the both sides symmetry of the finned tube is welded with the fin, the side of the fin away from the finned tube is provided with the circular back bending or U type back bending of preventing sharp edge cutting personnel;Or the side of the fin away from the finned tube of one side is provided with the circular back bending or U type back bending of preventing sharp edge cutting personnel, the side of the fin away from the finned tube of another side is provided with water collecting groove.

[0010] As a further optimization of the above technical solution, the fin has a wave structure in the form of a wave to increase the heat exchange area.

[0011] As a further optimization of the above technical solution, the water collecting groove is a V-shaped body or a U-shaped body.

[0012] As a further optimization of the above technical solution, the two fins on both sides of the finned tube are integrally formed by a semicircular sheet in the middle, and the semicircular sheet is welded to the finned tube.

[0013] The heat exchanger made of the finned tube and fin connecting structure, a plurality of the finned tubes are arranged side by side to form a finned tube group, and the fins are arranged on the upper and lower sides of the finned tube group in parallel to each other, all the finned tubes are sequentially connected in a serpentine tube through the semicircular tube, and copper pipes are welded at both ends of the serpentine tube, and needle valves are arranged at the end of the copper pipes to facilitate detection of the air tightness of the heat exchanger.

[0014] As a further optimization of the above technical solution, a plurality of the finned tubes are provided with perforations on the fins on both sides of the finned tubes, and a fixing pipe is arranged on all the perforations on the same straight line.

[0015] As a further optimization of the above technical solution, the perforations are arranged on the fins on both sides of the finned tubes, and a plurality of groups of the perforations are arranged on the upper and lower fins on both sides of the finned tubes, and a fixing pipe is arranged on each group of the perforations.

[0016] As a further optimization of the above technical solution, a heating element is arranged on each of the fins on the same side of the serpentine tube, and the heating elements on all the fins are sequentially connected in series to form a heating structure.

[0017] The positive effect of the utility model compared with the prior art is that the utility model is made of stainless steel material, which makes up for the shortcomings of using aluminum material.

[0018] 1. Good mechanical properties, the utility model is made of stainless steel material, the absolute strength of stainless steel is significantly higher than that of aluminum material, the tensile strength range is between 515-1300MPa (such as 520MPa of 304 stainless steel), and the tensile strength of aluminum material is only 100-400MPa.

[0019] 2. Strong corrosion resistance, the stability of stainless steel in high concentration acid and alkali is better, and aluminum material is easy to corrode quickly, even leading to structural damage, stainless steel has strong resistance to chloride ion erosion, and ordinary aluminum material may appear pitting (marine grade aluminum alloy can improve the resistance to chlorides through special alloying, but the cost is significantly increased).

[0020] 3. The stainless steel row is welded by steel pipes and steel belts, and the welding is simple and easy to operate.

[0021] 4. The cost of stainless steel is lower than that of aluminum material.

[0022] 5. The utility model sets up a water collecting groove to uniformly collect and discharge the water condensed on the outer surface of the heat exchanger. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is one of the structure schematic diagrams of the finned tube and fin welding connection of the utility model.

[0024] Figure 2 Fig. 2 is a structure schematic diagram of finned tube and fin welding connection of the utility model.

[0025] Figure 3 Fig. 3 is a structure schematic diagram of finned tube and fin welding connection of the utility model.

[0026] Figure 4 Fig. 4 is a structure schematic diagram of finned tube and fin welding connection of the utility model.

[0027] Figure 5 Fig. 5 is a structure schematic diagram of heat exchanger of the utility model. DETAILED DESCRIPTION

[0028] The utility model will be further described in conjunction with the specific embodiments of the drawings, referring to Figures 1-5 :

[0029] A finned tube 10 and fin 20 connecting structure, including the finned tube 10 and fin 20 made of stainless steel material, the fin 20 is symmetrically welded on both sides of the finned tube 10 through solder 30, the side of the fin 20 away from the finned tube 10 is provided with a circular back bend 40 or U-shaped back bend 41 for preventing sharp edges from cutting personnel, or the side of the fin 20 away from the finned tube 10 is provided with a circular back bend 40 or U-shaped back bend 41 for preventing sharp edges from cutting personnel, and the side of the fin 20 away from the finned tube 10 is provided with a water collecting groove.

[0030] As a further optimization of the above technical solutions, the fin 20 has a wave-shaped corrugated structure for increasing the heat exchange area.

[0031] As a further optimization of the above technical solutions, the water collecting groove is a V-shaped body 42 or a U-shaped body 43.

[0032] As a further optimization of the above technical solutions, the two fins 20 on both sides of the finned tube 10 are integrally formed through a semicircular sheet 21 in the middle, and the semicircular sheet 21 is welded and connected to the finned tube 10 through solder 30.

[0033] The heat exchanger made of the finned tube 10 and fin 20 connecting structure, a plurality of finned tubes 10 are arranged side by side to form a finned tube group, and the fins 20 are arranged on the upper and lower sides of the finned tube group in parallel, and all the finned tubes 10 are sequentially connected through semicircular tubes 11 at the head and tail to form a serpentine tube, copper pipes 45 are welded at both ends of the serpentine tube, and needle valves 46 are arranged at the end of the copper pipes 45 for facilitating detection of the airtightness of the heat exchanger.

[0034] As the further optimization of the above technical scheme, the perforations 40 are arranged on the fins 20 on both sides of the finned tube 10 perpendicularly to the finned tube 10, and one fixing tube 41 is arranged on all the perforations 40 on the same straight line.

[0035] As the further optimization of the above technical scheme, the perforations 40 are arranged on the fins 20 on both sides of the finned tube 10 perpendicularly to the finned tube 10, and one fixing tube 41 is arranged on all the perforations 40 on the same straight line.

[0036] As the further optimization of the above technical scheme, the perforations 40 are arranged on the fins 20 on both sides of the finned tube 10 perpendicularly to the finned tube 10, and one fixing tube 41 is arranged on all the perforations 40 on the same straight line.

[0037] The above embodiments are only used to illustrate the technical scheme of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still make simple replacements or modifications to the technical scheme or technical features recorded in the foregoing embodiments by using similar technology, and these simple replacements or modifications do not make the essence of the corresponding technical scheme deviate from the spirit and substance of the technical scheme of the present application, and still fall within the protection scope of the present application.

Claims

1. A finned tube and fin connection structure, characterized in that: The device includes a finned tube and fins made of stainless steel. The fins are symmetrically welded to both sides of the finned tube. The side of the fin away from the finned tube is provided with a circular bend or U-shaped bend to prevent people from being cut by sharp edges; or the side of the fin away from the finned tube on one side is provided with a circular bend or U-shaped bend to prevent people from being cut by sharp edges, and the side of the fin away from the finned tube on the other side is provided with a water receiving trough.

2. The finned tube and fin connection structure according to claim 1, characterized in that: The fins have a corrugated structure to increase the heat exchange area.

3. The finned tube and fin connection structure according to claim 1, characterized in that: The water receiving tank is V-shaped or U-shaped.

4. The finned tube and fin connection structure according to claim 1, characterized in that: The two fins on both sides of the finned tube are integrally formed by a semi-circular sheet in the middle, and the semi-circular sheet is welded to the finned tube.

5. A heat exchanger made using the finned tube and finned connection structure as described in any one of claims 1-4, characterized in that: Multiple finned tubes are arranged side by side to form a finned tube group, and the fins are arranged parallel to each other on the upper and lower sides of the finned tube group. All the finned tubes are connected end to end by a semi-circular tube to form a serpentine tube. Copper tubes are welded to both ends of the serpentine tube, and needle valves are provided at the ends of the copper tubes for easy testing of the airtightness of the heat exchanger.

6. The heat exchanger according to claim 5, characterized in that: Perforations perpendicular to the finned tubes are provided on the fins on both sides of the multiple finned tubes, and a fixing tube is inserted through all the perforations on the same straight line.

7. The heat exchanger according to claim 6, characterized in that: The perforation is provided on at least one set of perforations on each of the upper and lower fins on both sides of the finned tube, forming at least four sets of perforations, and a fixed tube is inserted through each set of perforations.

8. The heat exchanger according to claim 5, characterized in that: A heating element is fixed on each fin on the same side of the serpentine tube, and the heating elements on all the fins are connected end to end to form a series heating structure.

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