CN215261306U

CN215261306U - Coiled tube type heat exchanger and refrigerating system

Info

Publication number: CN215261306U
Application number: CN202121212323.9U
Authority: CN
Inventors: 周晓晓; 杨晨; 包先斌; 史俊茹
Original assignee: Dunan Environment Technology Co Ltd
Current assignee: Dunan Environment Technology Co Ltd
Priority date: 2021-06-01
Filing date: 2021-06-01
Publication date: 2021-12-21
Anticipated expiration: 2031-06-01

Abstract

The utility model relates to a refrigeration technology field especially relates to around tubular heat exchanger and refrigerating system. A wound tube type heat exchanger comprises a barrel assembly, a central barrel and a plurality of heat exchange tubes, wherein a barrel cavity is formed in the barrel, the central barrel is arranged in the barrel cavity, the heat exchange tubes are used for allowing tube side media to flow, the wound tube type heat exchanger is provided with a first end and a second end which are arranged oppositely, and a tube side inlet and a tube side outlet are formed in the barrel assembly; the tube side inlet and the tube side outlet are both located at the first end, the heat exchange tube comprises a first tube and a second tube, the first tube is layered and spirally surrounds the center tube, one end of the first tube is connected to the second tube, the other end of the first tube is connected to the tube side inlet or the tube side outlet, the second tubes are parallelly arranged in the center tube in a penetrating mode, and one end of the second tube penetrates out of the center tube and is connected with the tube side outlet or the tube side inlet. The utility model has the advantages that: the space of the central cylinder can be fully utilized, the space utilization rate of the coiled tube type heat exchanger is improved, and the shape of the coiled tube type heat exchanger is more compact.

Description

Coiled tube type heat exchanger and refrigerating system

Technical Field

The utility model relates to a refrigeration technology field especially relates to around tubular heat exchanger and refrigerating system.

Background

The winding tube type heat exchanger is arranged in the refrigerating system and used for heat exchange, and the plurality of heat exchange tubes are spirally wound outside the central cylinder, so that the heat exchange device has the characteristics of compact structure and good heat exchange effect.

The existing coiled tube type heat exchanger has the defects that the minimum radius of a coiled copper tube is limited due to the extremely thin tube wall of the copper tube of the heat exchange tube, a central tube is often arranged to be large, the internal space of the central tube is wasted, and the utilization rate of the internal space of the coiled tube type heat exchanger is low.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a around tubular heat exchanger, technical scheme is as follows:

a wound tube type heat exchanger comprises a barrel assembly, a central barrel and a plurality of heat exchange tubes, wherein a barrel cavity is formed in the barrel, the central barrel is arranged in the barrel cavity, the heat exchange tubes are used for allowing a tube pass medium to flow, the wound tube type heat exchanger is provided with a first end and a second end which are oppositely arranged, and a tube pass inlet and a tube pass outlet are formed in the barrel assembly; the tube side import reaches the tube side export all is located first end, the heat exchange tube includes first pipe and second pipe, first pipe layering and be the heliciform and encircle in outside the central section of thick bamboo, the one end of first pipe connect in the second pipe, the other end connect in the tube side import or the tube side export, many the second pipe is worn to locate side by side in the section of thick bamboo of center, the one end of second pipe is worn out outside the central section of thick bamboo and with the tube side export or the tube side access connection.

So set up, can make full use of the space of a central section of thick bamboo, improve the inside space utilization of tube heat exchanger.

In one embodiment, two ends of the central cylinder are open, a spiral plate is arranged in the central cylinder, and the second pipes penetrate through the spiral plate.

So set up, play the supporting role to the second pipe.

In one embodiment, the second tube is a straight tube;

the plurality of straight pipes are arranged in parallel, one end of each straight pipe is connected to the first pipe, and the other end of each straight pipe is connected to the pipe pass outlet or the pipe pass inlet;

or, every two straight pipes are connected into a U-shaped pipe through a bent pipe, one end of each U-shaped pipe is connected to the first pipe, and the other end of each U-shaped pipe is connected to the pipe pass outlet or the pipe pass inlet;

or, a plurality of the straight pipes are connected into a coiled pipe through a bent pipe, one end of the coiled pipe is connected to the first pipe, and the other end of the coiled pipe is connected to the pipe pass outlet or the pipe pass inlet.

In one embodiment, a liquid separating assembly is arranged in the tube pass inlet and is connected to the inlet of the first tube or the inlet of the second tube.

The arrangement is such that the tube-side medium is distributed uniformly to the first tube or the second tube.

In one embodiment, a gas collecting assembly is arranged in the tube side outlet and connected to the outlet of the first tube or the outlet of the second tube.

In one embodiment, the barrel assembly comprises a barrel and at least two blank caps, the blank caps are disc-shaped, and the two blank caps are respectively arranged at two ends of the barrel and seal the barrel cavity.

So set up, save cost.

In one embodiment, the cylinder is provided with a first connecting pipe and a second connecting pipe, the first connecting pipe and the second connecting pipe are respectively arranged near the first end and the second end, and the first connecting pipe and the second connecting pipe are respectively communicated with the cylinder cavity.

In one embodiment, a gasket is arranged between the first pipes of the adjacent layers.

So set up for in the clearance between the first pipe of shell side medium can get into adjacent layer, with the abundant heat transfer of tube side medium.

In one embodiment, the first tubes of each two adjacent layers have opposite spiral directions.

By the arrangement, the turbulence of fluid on the shell side between the heat exchange pipes can be enhanced, and heat exchange is enhanced.

The utility model discloses still provide following technical scheme:

a refrigeration system comprises the coiled heat exchanger.

Compared with the prior art, the utility model provides a around tubular heat exchanger is through setting up the tube side import with the tube side export in same one end to satisfy refrigerating system's structural requirement, the refrigerating system producer need not to modify its structure itself, simultaneously, encircles first pipe outside central section of thick bamboo, sets up the second pipe side by side in a central section of thick bamboo, make full use of a central section of thick bamboo's inner space, improved around tubular heat exchanger's inner space's utilization ratio.

Drawings

Fig. 1 is a schematic view of a first tube connection tube side inlet structure in a coiled tube heat exchanger according to the present invention;

FIG. 2 is a schematic view of the first tube side outlet of the coiled heat exchanger;

fig. 3 is a left side view of the coiled heat exchanger.

The symbols in the drawings represent the following meanings:

100. a coiled heat exchanger; 101. a first end; 102. a second end; 10. a cartridge assembly; 11. a barrel; 111. a barrel cavity; 112. a tube side inlet; 113. a tube side outlet; 114. a first adapter tube; 115. a second adapter tube; 12. covering the blank with a cover; 20. a central barrel; 21. a spiral plate; 30. a heat exchange pipe; 31. a first tube; 32. a second tube; 40. a liquid separating component; 41. a liquid separation head; 411. a liquid separation hole; 412. a first capillary tube; 413. a second capillary tube; 50. a gas collection assembly.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 3, the present invention provides a coiled heat exchanger 100, wherein the coiled heat exchanger 100 is installed in a refrigeration system for heat exchange.

Specifically, referring to fig. 1 and 2, the coiled heat exchanger 100 includes a cylinder assembly 10, a central cylinder 20 and a plurality of heat exchange tubes 30, a cylinder 11 has a cylinder cavity 111 therein, and the central cylinder 20 and the heat exchange tubes 30 are disposed in the cylinder cavity 111.

In this embodiment, the cylinder assembly 10 includes a cylinder 11 and at least two blank caps 12, the two blank caps 12 are respectively disposed at two ends of the cylinder 11 to seal the cylinder 11, and the blank caps 12 are disc-shaped, so as to reduce the cost. In other embodiments, the barrel assembly 10 may include a barrel 11 and two hemispherical covers respectively disposed at two ends of the barrel 11.

Referring to fig. 2, a first connection pipe 114 and a second connection pipe 115 are arranged on the cylinder 11, the first connection pipe 114 and the second connection pipe 115 are respectively communicated with the cylinder cavity 111, the coiled heat exchanger 100 has a first end 101 and a second end 102 which are oppositely arranged, the first connection pipe 114 is arranged near the first end 101, the second connection pipe 115 is arranged near the second end 102, a shell-side medium enters from the second connection pipe 115, exchanges heat with the shell-side medium, and then flows out from the first connection pipe 114, or the shell-side medium flows in from the first connection pipe 114 and then flows out from the second connection pipe 115. It should be noted that, in this embodiment, the tube-side medium may be a refrigerant, and the shell-side medium may be water, and according to the different properties of the media, a suitable medium is selected to pass through the tube side, and another medium passes through the shell side.

The tube side outlet 113 and the tube side inlet 112 are formed in the cylinder assembly 10, and the tube side outlet 113 and the tube side inlet 112 are formed in the first end 101, so that a tube side medium can enter and exit from the same end, the refrigeration system is suitable for a refrigeration system with the tube side medium entering and exiting at the same end in the current market, and the original design is prevented from being changed by a refrigeration system manufacturer.

In this embodiment, the tube-side outlet 113 and the tube-side inlet 112 are both disposed on the blank cap 12, and in other embodiments, the tube-side outlet 113 and the tube-side inlet 112 may also be disposed on the barrel 11.

The heat exchange tube 30 comprises a first tube 31 and a second tube 32, the first tube 31 is layered and spirally surrounds the central cylinder 20, the spiral shape can enhance the shock resistance of the heat exchange tube 30 and relieve the telescopic stress caused by different temperatures, one end of the first tube 31, which is far away from the second tube 32, is connected to the tube side inlet 112 or the tube side outlet 113, a plurality of second tubes 32 are parallelly arranged in the central cylinder 20 in a penetrating manner to form a tube array structure, and one end of each second tube 32 penetrates out of the central cylinder 20 and is connected with the tube side outlet 113 or the tube side inlet 112. That is, the heat exchange tubes 30 outside the central tube 20 are spiral, and the heat exchange tubes 30 inside the central tube 20 are tube arrays. The first pipe 31 and the second pipe 32 may be connected directly or via a liquid separation head.

Referring to fig. 1, when the inlet of the first pipe 31 is connected to the pipe-side inlet 112, the outlet of the second pipe 32 is connected to the pipe-side outlet 113; referring to fig. 2, when the outlet of the first tube 31 is connected to the tube-side outlet 113, the inlet of the second tube 32 is connected to the tube-side inlet 112.

The central cylinder 20 is internally provided with a spiral plate 21, a plurality of second tubes 32 are arranged on the spiral plate 21 in a penetrating way, and the spiral plate 21 is used for supporting the second tubes 32.

The central tube 20 is provided with both ends open to facilitate the arrangement of the second tube 32.

In one embodiment, the second tube 32 is a straight tube, and a plurality of straight tubes are arranged in parallel, and each straight tube has one end connected to the first tube 31 and the other end connected to the tube-side inlet 112 or the tube-side outlet 113.

In another embodiment, two straight pipes are connected in series to form a U-shaped pipe through a bent pipe, one end of the U-shaped pipe is connected to the first pipe 31, and the other end of the U-shaped pipe is connected to the tube side inlet 112 or the tube side outlet 113.

In yet another embodiment, the straight pipes are sequentially connected in series by the bent pipes to form a serpentine pipe, one end of the serpentine pipe is connected to the first pipe 31, and the other end is connected to the tube-side inlet 112 or the tube-side outlet 113. In other embodiments, a single straight tube, a single U-shaped tube, a single serpentine tube, or any two or three of them may be disposed within the central tube 20.

A liquid separating assembly 40 is arranged in the tube side inlet 112, and the liquid separating assembly 40 is connected with the inlet of each first tube 31 or the inlet of each second tube 32.

A gas collecting assembly 50 is arranged in the tube side outlet 113, and the gas collecting assembly 50 is connected to the outlet of each second tube 32 or the outlet of the first tube 31.

The liquid separating assembly 40 is a liquid separating head 41, the gas collecting assembly 50 is a liquid separating head 41, a plurality of liquid separating holes 411 are formed in the liquid separating head 41, a plurality of first capillaries 412 are welded on the liquid separating holes 411 of the liquid separating assembly 40, the first capillaries 412 are respectively connected to the inlets of the first pipes 31 or the inlets of the second pipes 32 in a one-to-one correspondence manner, a plurality of second capillaries 413 are welded on the liquid separating holes 411 of the gas collecting assembly 50, and the second capillaries 413 are respectively connected to the outlets of the second pipes 32 or the outlets of the first pipes 31 in a one-to-one correspondence manner.

In other embodiments, the liquid separating assembly 40 and the gas collecting assembly 50 may also be a tube plate (not shown), the tube plate is provided with a plurality of fixing holes (not shown), the plurality of first capillaries 412 are respectively expanded in the fixing holes of the liquid separating assembly 40 in a one-to-one correspondence, and the plurality of second capillaries 413 are respectively expanded in the fixing holes of the gas collecting assembly 50 in a one-to-one correspondence.

The first pipes 31 of the two adjacent layers are arranged at intervals, the gaps between the first pipes 31 of the adjacent layers are 1-4 mm along the radial direction of the central cylinder 20, and the gaps between the adjacent layers are used for allowing a shell side medium to flow, so that the pipe side medium and the shell side medium can exchange heat fully. It can be understood that if the gap between the first tubes 31 of adjacent layers is too small, the shell-side medium cannot flow, or the flow velocity of the shell-side medium is too large, which increases the flow resistance, and if the gap between the first tubes 31 of adjacent layers is too large, the flow velocity of the shell medium is reduced, which decreases the heat exchange coefficient. The gap between the first tubes 31 of adjacent layers may be any value between 1mm, 1.5mm, 1.6mm, 2mm, 2.6mm, 3mm or 1mm to 3 mm.

Preferably, the spiral directions of the first tubes 31 of two adjacent layers are opposite, so as to enhance the turbulence of the shell-side medium between the first tubes 31 and enhance the heat exchange.

Be equipped with between the inner wall of outermost first pipe 31 and barrel 11 and wrap up the section of thick bamboo (not shown), wrap up the section of thick bamboo winding outside the outermost first pipe 31 of changing, wrap up on being fixed in the inner wall of barrel 11, it plays the water conservancy diversion effect to wrap the section of thick bamboo, prevents that shell side medium from bypassing between the inner wall of outermost heat exchange tube 30 and barrel 11 to influence heat transfer effect, also play the friction between the inner wall of preventing barrel 11 and heat exchange tube 30 simultaneously, thereby prevent that heat exchange tube 30 from being produced by the frictional fracture and leaking.

The utility model also provides a refrigerating system, including foretell wound tube heat exchanger 100.

In the working process, the tube pass medium enters from the liquid separating component 40, is uniformly separated by the liquid separating component 40, enters the inlets of the first tubes 31, flows spirally, enters the second tubes 32 for secondary heat exchange, passes out of the central cylinder 20 and flows out of the tube pass outlet 113; alternatively, the tube-side medium first enters the inlet of the second tube 32 and then enters the first tube 31 to flow spirally, thereby improving the utilization rate of the internal space of the tubular heat exchanger 100.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A wound tube type heat exchanger comprises a tube body assembly (10), a central tube (20) and a plurality of heat exchange tubes (30), wherein a tube cavity (111) is formed in the tube body (11), the central tube (20) is arranged in the tube cavity (111), the heat exchange tubes (30) are used for allowing tube pass media to flow, the wound tube type heat exchanger is provided with a first end (101) and a second end (102) which are arranged oppositely, and a tube pass inlet (112) and a tube pass outlet (113) are formed in the tube body assembly (10);

the heat exchange tube is characterized in that the tube side inlet (112) and the tube side outlet (113) are both located at the first end (101), the heat exchange tube (30) comprises a first tube (31) and a plurality of second tubes (32), the first tube (31) is layered and spirally surrounds the center tube (20), one end of the first tube (31) is connected to the second tube (32), the other end of the first tube is connected to the tube side inlet (112) or the tube side outlet (113), the plurality of second tubes (32) are parallelly arranged in the center tube (20) in a penetrating manner, and one end of each second tube (32) penetrates out of the center tube (20) and is connected with the tube side outlet (113) or the tube side inlet (112).

2. The coiled heat exchanger according to claim 1, wherein the central cylinder (20) is open at both ends, a spiral plate (21) is arranged in the central cylinder (20), and the second tubes (32) are arranged on the spiral plate (21) in a penetrating manner.

3. The coiled heat exchanger according to claim 1, wherein the second tube (32) is a straight tube;

the straight pipes are arranged in parallel, one end of each straight pipe is connected to the first pipe (31), and the other end of each straight pipe is connected to the pipe pass outlet (113) or the pipe pass inlet (112);

or, every two straight pipes are connected into a U-shaped pipe through a bent pipe, one end of each U-shaped pipe is connected to the first pipe (31), and the other end of each U-shaped pipe is connected to the pipe pass outlet (113) or the pipe pass inlet (112);

or the straight pipes are connected into a coiled pipe through a bent pipe, one end of the coiled pipe is connected to the first pipe (31), and the other end of the coiled pipe is connected to the pipe pass outlet (113) or the pipe pass inlet (112).

4. The coiled heat exchanger according to claim 1, wherein a liquid separation assembly (40) is arranged in the tube side inlet (112), and the liquid separation assembly (40) is connected to the inlet of the first tube (31) or the inlet of the second tube (32).

5. The coiled heat exchanger according to claim 1, wherein a gas collection assembly (50) is provided in the tube-side outlet (113), the gas collection assembly (50) being connected to the outlet of the first tube (31) or the outlet of the second tube (32).

6. The coiled heat exchanger according to claim 1, wherein the cylinder assembly (10) comprises a cylinder (11) and at least two lids (12), the lids (12) are disc-shaped, and the two lids (12) are respectively disposed at two ends of the cylinder (11) and seal the cylinder cavity (111).

7. The coiled heat exchanger according to claim 1, wherein a first connecting pipe (114) and a second connecting pipe (115) are arranged on the cylinder (11), the first connecting pipe (114) and the second connecting pipe (115) are respectively arranged near the first end (101) and the second end (102), and the first connecting pipe (114) and the second connecting pipe (115) are respectively communicated with the cylinder cavity (111).

8. A wound tube heat exchanger according to claim 1, wherein a spacer is provided between the first tubes (31) of adjacent layers.

9. A wound tube heat exchanger according to claim 1, wherein the first tubes (31) of each two adjacent layers have opposite helical directions.

10. A refrigeration system comprising a coiled heat exchanger according to any of claims 1 to 9.