CN211452019U - Finned tube heat exchanger - Google Patents

Abstract

The utility model discloses a finned tube heat exchanger, including front tube case, back tube case, preceding tube sheet, back tube sheet, a plurality of finned tubes, left side board, right side board, tube side import, tube side export, left side board, right side board, front tube sheet and back tube sheet enclose into shell side passageway, a plurality of finned tubes set up in shell side passageway, the both ends of a plurality of finned tubes communicate with front tube case, back tube case respectively, the finned tube includes the parent tube, a plurality of fins that set up along the length direction of the tube of parent tube equidistance, the fin has increased heat transfer area, and the hole of detouring on the fin is favorable to the gas mixing between the fin, the convection heat transfer coefficient of fin has been improved, the spoiler that turns up around the hole edge, can disturb the gas that flows through, the torrent degree of reinforcing air current, improve the convection heat transfer coefficient of finned tube, can also play the effect of location when installing the fin, form the support to the fin simultaneously, the fins are not easy to deform and bend. The finned tube heat exchanger can be applied to heating and cooling of various industrial gases.

Description

Finned tube heat exchanger

Technical Field

The utility model relates to a field of heat exchanger, in particular to finned tube heat exchanger.

Background

At present, evaporators and condensers used in the refrigeration and air-conditioning fields and various air coolers applied in industry are finned tube heat exchangers, and air and liquid flow in the tubes. The finned tube heat exchanger is generally characterized in that fins are added on a U-shaped copper tube or a steel tube, so that the heat transfer area outside the tube is increased, and the heat transfer coefficient of the air side is improved. The fin material is copper or aluminum, and the fin types include straight fins, corrugated fins, slotted fins and the like.

The present finned tube heat exchangers have the following problems in use: the thickness of fin is only 0.2 ~ 0.5mm generally, and intensity is not enough, and easy bending deformation to current fin is only simply increase heat transfer area and improves heat transfer effect, and the air can only singly flow along the direction that the fin extends.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a finned tube heat exchanger, which solves one or more of the problems of the prior art, and provides at least one of the advantages of the present invention.

The technical scheme adopted for solving the technical problems is as follows:

a finned tube heat exchanger comprises a front tube box, a rear tube box, a front tube plate, a rear tube plate, a plurality of finned tubes, a left side plate, a right side plate, a tube pass inlet and a tube pass outlet, wherein the left side plate and the right side plate are arranged between the front tube plate and the rear tube plate at a left-right interval, two ends of the left side plate and the right side plate are respectively fixedly connected with the front tube plate and the rear tube plate, the left side plate, the right side plate, the front tube plate and the rear tube plate enclose a shell pass channel, a plurality of mounting holes capable of fixing the finned tubes are respectively arranged on the front tube plate and the rear tube plate, the rear tube box is fixed on the rear side of the rear tube plate, the front tube box is fixed on the front side of the front tube plate, two ends of the finned tubes are respectively fixed on the mounting holes of the front tube plate and the rear tube plate, the finned tubes are arranged in the shell pass channel, two ends of the finned tubes are respectively communicated with the front tube, the finned tube includes base tube, a plurality of fin that equidistant setting of tube length direction along the base tube, the fin is square shape the fin middle part is seted up the circular tube hole that equals with the base tube external diameter, the base tube passes the circular tube hole of fin, the fin cover is located on the base tube, the length of a side of fin equals the interval between two adjacent base tubes the fin is close to the marginal part symmetry and has seted up a plurality of around the discharge orifice, be square shape around the discharge orifice be connected with the spoiler of square around one side of discharge orifice, the spoiler sets up with the fin is perpendicular, the spoiler turns over towards one side near the fin middle when seting up around the discharge orifice and forms, the height of spoiler equals around the length of a side of discharge orifice and equals with the interval of fin.

The utility model has the advantages that: heat exchange gas carries out the heat exchange with the finned tube when flowing along shell side passageway, but set up a plurality of fins and increase heat transfer area on the parent tube, and the hole of flowing around on the fin is favorable to the gas mixture between the fin, improve the convection heat transfer coefficient of fin, the spoiler of turning up around the hole border, can disturb the gas that flows through on the one hand, strengthen the torrent degree of air current, improve the convection heat transfer coefficient of finned tube, on the other hand, because the interval of spoiler highly equals the fin, can play the effect of location when the installation fin, can also form the support to the fin, the intensity of fin has been increaseed, thereby make the fin be difficult to warp and crooked. Meanwhile, the side length of the fins is equal to the distance between two adjacent base tubes, and the adjacent finned tubes are mutually supported through the fins without other heat exchange tube supports. The circular tube holes of the fins are outward annular flanges, so that the connection stability of the fins and the heat exchange tube is enhanced, and the thermal contact resistance is reduced.

As a further improvement of the technical scheme, the side length of the flow winding hole is 2-4 mm.

As a further improvement of the technical scheme, the shape and the size of the spoiler are matched with those of the flow winding holes, and the spoiler is formed when the flow winding holes are formed.

As a further improvement of the technical scheme, the spoiler is perpendicular to the flow direction in the shell side channel.

As a further improvement of the technical scheme, an annular flanging is arranged outwards from the circular pipe hole, and the inner side of the flanging is in contact with the outer wall of the base pipe.

As a further improvement of the technical scheme, the height of the flanging is 2 mm.

As a further improvement of the above technical solution, the tube side inlet and the tube side outlet are respectively disposed on the front tube box and the rear tube box.

As a further improvement of the above technical solution, when the tube side of the finned tube heat exchanger is two tube sides, a partition plate a is arranged in the front tube box, the partition plate a is in the shape of | the front tube box, the partition plate a partitions the front tube box into a chamber a and a chamber b communicated with the finned tubes, the tube side inlet is arranged on the front tube box and communicated with the chamber a, and the tube side outlet is arranged on the front tube box and communicated with the chamber b.

As a further improvement of the above technical scheme, when the tube side of the finned tube heat exchanger is a four-tube side, a partition plate B is arranged in the front tube box, the partition plate B is of a 'one' type, the partition plate B divides the front tube box into a chamber C communicated with the finned tube, a chamber d and a chamber e, a partition plate C is arranged in the rear tube box, the partition plate C is of a 'one' type, the partition plate C divides the rear tube box into a chamber f communicated with the finned tube and a chamber g, the chamber C, the chamber f and the chamber e are communicated in sequence, the chamber e, the chamber g and the chamber d are communicated in sequence, a tube side inlet is arranged on the front tube box and communicated with the chamber C, and a tube side outlet is arranged on the front tube box and communicated with the chamber d.

Drawings

The present invention will be further explained with reference to the drawings and examples;

FIG. 1 is a schematic structural view of the heat exchanger of the present invention with a single tube pass;

FIG. 2 is a schematic structural view of the finned tube of the present invention;

fig. 3 is a front view of the fin of the present invention;

figure 4 is a side view of the fin of the present invention;

FIG. 5 is a schematic diagram of the front tube box of the heat exchanger of the present invention on both tube sides;

FIG. 6 is a schematic diagram of the back tube box of the heat exchanger of the present invention on both tube sides;

fig. 7 is a front view of the front header in a four-pass heat exchanger of the present invention;

FIG. 8 is a sectional view A-A of FIG. 7;

fig. 9 is a top view of the front header in a four-pass heat exchanger of the present invention;

fig. 10 is a schematic diagram of the rear tube box in the case of four tube passes of the heat exchanger of the present invention.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, if words such as "a plurality" are used, the meaning is one or more, the meaning of a plurality of words is two or more, and the meaning of more than, less than, more than, etc. is understood as not including the number, and the meaning of more than, less than, more than, etc. is understood as including the number.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1 to 10, a fin tube heat exchanger according to the present invention is made as follows:

a finned tube heat exchanger is disclosed, as shown in FIG. 1, comprising a front tube box 100, a rear tube box 200, a front tube plate 300, a rear tube plate 400, a plurality of finned tubes 500, a left side plate 600, a right side plate 700, a tube pass inlet 800 and a tube pass outlet 900, wherein the left side plate 600 and the right side plate 700 are arranged between the front tube plate 300 and the rear tube plate 400 at intervals in the left-right direction, two ends of the left side plate 600 and the right side plate 700 are respectively fixedly connected with the front tube plate 300 and the rear tube plate 400, the left side plate 600, the right side plate 700, the front tube plate 300 and the rear tube plate 400 enclose a shell pass channel for air to pass through, a plurality of mounting holes for fixing the finned tubes 500 are respectively arranged on the front tube plate 300 and the rear tube plate 400, the rear tube box 200 is fixed on the rear side of the rear tube plate 400, the front tube box 100 is fixed on the front side of the front tube plate 300, two ends of the plurality of, the two ends of the finned tube 500 are fixedly connected with the front tube plate and the rear tube plate through expansion joint or welding, the finned tubes 500 are arranged in a shell pass channel, the two ends of the finned tubes 500 are respectively communicated with the front tube box 100 and the rear tube box 200, the air flow direction in the shell pass channel is perpendicular to the axis direction of the finned tube 500, as shown in fig. 2, the finned tube 500 comprises a base tube 510 and a plurality of fins 520 arranged at equal intervals along the tube length direction of the base tube 510, the fins 520 are square, circular tube holes 521 with the same outer diameter as that of the base tube 510 are formed in the middle of the fins 520, as shown in fig. 3, the base tube 510 penetrates through the circular tube holes 521 of the fins 520, the fins 520 are sleeved on the base tube 510, the fins 520 are fixedly connected with the base tube 510 through expansion joint, the side length of the fins 520 is equal to the interval between the two adjacent base tubes 510, and a, the bypass hole 522 is square, and as shown in fig. 4, a square spoiler 523 is connected to one side of the bypass hole 522, and the spoiler 523 is folded toward a side close to the middle of the fin 520 when the bypass hole 522 is opened. The spoiler 523 is arranged perpendicular to the fin 520, and the height of the spoiler 523 is equal to the side length of the bypass hole 522 and the distance between the fins 520.

When using, heat exchange gas carries out the heat exchange with fin tube 500 when flowing along shell side passageway, it can increase heat transfer area to set up a plurality of fins 520 on base pipe 510, and the hole 522 of circling on the fin 520 is favorable to the gas mixing between fin 520, improve fin 520's convection heat transfer coefficient, the spoiler 523 of circling around the hole 522 border turn-up, can disturb the gas that flows through on the one hand, the torrent degree of reinforcing air current, improve fin tube 500's convection heat transfer coefficient, on the other hand, because spoiler 523 highly equals fin 520's interval, can play the effect of location when installing fin 520, can also form the support to fin 520, fin 520's intensity has been increaseed, thereby make fin 520 be difficult to warp and crooked. Meanwhile, the side length of the fins 520 is equal to the distance between two adjacent base tubes 510, and the fins 520 between the adjacent finned tubes 500 are mutually supported without other heat exchange tube supports. The annular flange 524 outward of the circular pipe hole 521 of the fin 520 enhances the connection stability of the fin 520 and the base pipe 510 and reduces the contact thermal resistance.

In some embodiments, the spoiler 523 matches the shape and size of the bypass hole 522, and the spoiler 523 is formed when the bypass hole 522 is opened. When the fin 520 is provided with the bypass flow hole 522, the three sides of the square are cut off from the fin 520, and the cut-off portion is turned up by 90 ° around the remaining side to form the spoiler 523, so that welding is not required.

In some embodiments, the spoilers 523 are perpendicular to the flow direction within the shell-side channels, which can reduce the resistance of the shell-side channels.

In some embodiments, an annular flange 524 is provided outwardly at one end of the circular pipe aperture 521, and the inside of the flange 524 is in contact with the outer wall of the base pipe 510. The flanging increases the contact area between the fins 520 and the outer wall of the base pipe 510, improves the connection reliability between the fins 520 and the base pipe 510, reduces the contact thermal resistance between the fins 520 and the base pipe 510, and is beneficial to transferring heat to the fins 520 from the pipe wall.

In some embodiments, the height of the flange 524 is 2 mm.

In some embodiments, as shown in fig. 1, the tube side inlet 800 and the tube side outlet 900 are disposed on the front tube box 100 and the rear tube box 200, respectively. The heat exchanger is a single pass flow, and the heat exchange fluid enters the front header 100 from the tube pass inlet 800, then flows into the rear header 200 through the finned tubes 500, and finally flows out from the tube pass outlet 900.

In some embodiments, a partition is disposed in the front channel box 100 and/or the rear channel box 200, and the tube-side inlet 800 and the tube-side outlet 900 are disposed on the front channel box 100 and/or the rear channel box 200. The provision of different forms and numbers of baffles within the front header 100 and/or the rear header 200, as well as the provision of different locations for the tube-side inlet 800 and the tube-side outlet 900, may result in a heat exchanger multi-pass flow.

Specifically, in some embodiments, as shown in fig. 5 and 6, when the tube side of the finned tube heat exchanger is two tube sides, a partition a110 is provided in the front tube box 100, the partition a110 is "|", the partition a110 partitions the front tube box 100 into a chamber a120 and a chamber b130 communicating with the finned tube 500, the tube side inlet 800 is provided on the front tube box 100 and communicates with the chamber a120, and the tube side outlet 900 is provided on the front tube box 100 and communicates with the chamber b 130. At this time, the heat exchanger flows in two tube passes, and the heat exchange fluid flows into the chamber a120 from the tube pass inlet 800, flows into the rear tube box 200 through the finned tube 500 on one side, flows into the chamber b130 through the finned tube 500 on the other side, and finally flows out from the tube pass outlet 900.

In some embodiments, as shown in fig. 7 to 10, when the tube side of the finned tube heat exchanger is a four-tube side, a partition B140 is disposed in the front tube box 100, the partition B140 is "one", the partition B140 partitions the front tube box 100 into a chamber C150, a chamber d160 and a chamber e170 communicating with the finned tube 500, a partition C210 is disposed in the rear tube box 200, the partition C210 is "one", the partition C210 partitions the rear tube box 200 into a chamber f220 and a chamber g230 communicating with the finned tube 500, the chamber C150 and the chamber f220 are sequentially communicated with the chamber e170, the chamber e170 and the chamber g230 are sequentially communicated with the chamber d160, the tube side inlet 800 is disposed on the front tube box 100 and is communicated with the chamber C150, and the tube side outlet 900 is disposed on the front tube box 100 and is communicated with the chamber d 160. The heat exchanger now flows on a four pass basis with heat exchange fluid flowing from the tube pass inlet 800 into chamber c150, through the first section of finned tubes 500 into chamber f220, then through the second section of finned tubes 500 into chamber e170, then through the third section of finned tubes 500 into chamber g230, then through the fourth section of finned tubes 500 into chamber d160, and finally out the tube pass outlet 900. Six tube passes or eight tube passes can also be formed as required.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the details of the embodiments shown, but is capable of various modifications and substitutions without departing from the spirit of the invention.

Claims (10)

1. A finned tube heat exchanger characterized by: the finned tube type air conditioner comprises a front tube box (100), a rear tube box (200), a front tube plate (300), a rear tube plate (400), a plurality of finned tubes (500), a left side plate (600), a right side plate (700), a tube pass inlet (800) and a tube pass outlet (900), wherein the left side plate (600) and the right side plate (700) are arranged between the front tube plate (300) and the rear tube plate (400) at left and right intervals, two ends of the left side plate (600) and the right side plate (700) are fixedly connected with the front tube plate (300) and the rear tube plate (400) respectively, a shell pass channel is enclosed by the left side plate (600), the right side plate (700), the front tube plate (300) and the rear tube plate (400), a plurality of mounting holes capable of fixing the finned tubes (500) are formed in the front tube plate (300) and the rear tube plate (400), the rear tube box (200) is fixed at the rear side of the rear tube plate (400), the front tube box (100, the two ends of the finned tubes (500) are respectively fixed on a mounting hole of the front tube plate (300) and a mounting hole of the rear tube plate (400), the finned tubes (500) are arranged in a shell pass channel, the two ends of the finned tubes (500) are respectively communicated with the front tube box (100) and the rear tube box (200), the air flow direction in the shell pass channel is perpendicular to the axis direction of the finned tubes (500), the finned tubes (500) comprise base tubes (510) and a plurality of fins (520) which are arranged at equal intervals along the tube length direction of the base tubes (510), the fins (520) are square, round tube holes (521) with the same outer diameter as that of the base tubes (510) are formed in the middle parts of the fins (520), the base tubes (510) penetrate through the round tube holes (521) of the fins (520), the base tubes (520) are sleeved on the base tubes (510), and the fins (520) are equal to the interval between two adjacent base tubes (510), the fin (520) are close to the edge part and have symmetrically been seted up a plurality of around flowing hole (522), around flowing hole (522) are square shape one side around flowing hole (522) is connected with square spoiler (523), spoiler (523) and fin (520) set up perpendicularly, spoiler (523) height equals around the length of side of flowing hole (522) and equals with fin (520) interval.

2. A finned tube heat exchanger as claimed in claim 1 wherein: the side length of the flow winding hole (522) is 2-4 mm.

3. A finned tube heat exchanger as claimed in claim 1 wherein: the shape and size of the spoiler (523) are matched with that of the flow winding hole (522), and the spoiler (523) is formed by folding and turning over the side close to the middle of the fin (520) when the flow winding hole (522) is formed.

4. A finned tube heat exchanger as claimed in claim 3 wherein: the spoiler (523) is perpendicular to the flow direction in the shell-side channel.

5. A finned tube heat exchanger as claimed in claim 1 wherein: one end of the round pipe hole (521) is outwards provided with an annular flange (524), and the inner side of the flange (524) is in contact with the outer wall of the base pipe (510).

6. A finned tube heat exchanger according to claim 5 wherein: the height of turn-ups (524) is 2 mm.

7. A finned tube heat exchanger as claimed in claim 1 wherein: the tube side inlet (800) and the tube side outlet (900) are respectively arranged on the front tube box (100) and the rear tube box (200).

8. A finned tube heat exchanger as claimed in claim 1 wherein: partition plates are arranged in the front pipe box (100) and/or the rear pipe box (200), and the pipe side inlet (800) and the pipe side outlet (900) are arranged on the front pipe box (100) and/or the rear pipe box (200).

9. A finned tube heat exchanger as claimed in claim 8 wherein: when the tube pass of the finned tube heat exchanger is two tube passes, a partition plate A (110) is arranged in the front tube box (100), the partition plate A (110) is in an | shape, the partition plate A (110) divides the front tube box (100) into a chamber a (120) and a chamber b (130) which are communicated with the finned tubes (500), a tube pass inlet (800) is arranged on the front tube box (100) and communicated with the chamber a (120), and a tube pass outlet (900) is arranged on the front tube box (100) and communicated with the chamber b (130).

10. A finned tube heat exchanger as claimed in claim 8 wherein: when the tube pass of the finned tube heat exchanger is a four-tube pass, a partition plate B (140) is arranged in the front tube box (100), the partition plate B (140) is of a limiting type, the partition plate B (140) divides the front tube box (100) into a chamber C (150), a chamber d (160) and a chamber e (170) which are communicated with the finned tubes (500), a partition plate C (210) is arranged in the rear tube box (200), the partition plate C (210) is of a one-type, the partition plate C (210) divides the rear tube box (200) into a chamber f (220) and a chamber g (230) which are communicated with the finned tubes (500), the chamber C (150) and the chamber f (220) are sequentially communicated with the chamber e (170), the chamber e (170) and the chamber g (230) are sequentially communicated with the chamber d (160), and the tube pass inlet (800) is arranged on the front tube box (100) and is communicated with the chamber C (150), the tube side outlet (900) is arranged on the front tube box (100) and is communicated with the chamber d (160).

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