CN115727573A - Coiled tube type heat exchanger and refrigerating system - Google Patents
Coiled tube type heat exchanger and refrigerating system Download PDFInfo
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- CN115727573A CN115727573A CN202111003469.7A CN202111003469A CN115727573A CN 115727573 A CN115727573 A CN 115727573A CN 202111003469 A CN202111003469 A CN 202111003469A CN 115727573 A CN115727573 A CN 115727573A
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Abstract
The invention relates to the technical field of refrigeration, in particular to a wound tube type heat exchanger and a refrigeration system. A wound tube type heat exchanger comprises a barrel assembly, a central tube and heat exchange tubes, wherein the central tube is arranged in a shell cavity, and the central tube spirally surrounds a plurality of layers of heat exchange tubes; each layer of heat exchange tube comprises a plurality of heat exchange tubes, each heat exchange tube is wound into a cylindrical spiral shape, and the inner diameter D of the cylinder corresponding to the cylindrical spiral heat exchange tube 1 The cylindrical spiral heat exchange tube is defined as a first diameter and corresponds to the outer diameter D of the cylinder 2 The second diameter is defined, and at least two heat exchange tubes in the at least one layer of heat exchange tubes have corresponding first diametersAnd/or the corresponding second diameters of at least two heat exchange tubes in at least one layer of heat exchange tubes are different. The invention has the advantages that: the tube spacing between adjacent heat exchange tubes on the same layer can be increased, the problem that the flow velocity of the shell pass medium is reduced due to dirty blockage and dirt blockage is solved, the cost can be reduced, meanwhile, the turbulence degree of the shell pass medium can be increased, and the heat exchange performance is enhanced.
Description
Technical Field
The invention relates to the technical field of refrigeration, in particular to a wound tube type heat exchanger and a refrigeration 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 exchanger has the characteristics of compact design, small occupied area and good heat exchange effect.
In the existing pipe-wound heat exchanger, a shell pass medium flows in a shell cavity, dirty blockage and dirt blockage can be caused due to poor water quality, in order to enable the shell pass medium to flow smoothly, the distance between every two layers of heat exchange pipes needs to be increased, the flow velocity of the shell pass medium is reduced due to the increase of the layer distance, and the heat exchange performance of the pipe-wound heat exchanger is affected.
Disclosure of Invention
In order to solve the problems, the invention provides a coiled tube type heat exchanger, which adopts the following technical scheme:
a wound tube type heat exchanger comprises a barrel assembly, a central tube and heat exchange tubes, wherein a shell cavity for containing shell side media is formed in the barrel assembly, the central tube is arranged in the shell cavity, a plurality of layers of heat exchange tubes are spirally wound outside the central tube, and the heat exchange tubes are used for containing the shell side media; each layer of heat exchange tubes comprises a plurality of heat exchange tubes, each heat exchange tube is wound into a cylindrical spiral shape, and the inner diameter D of the cylinder corresponding to the heat exchange tube in the cylindrical spiral shape 1 The cylindrical spiral heat exchange tube is defined as a first diameter and corresponds to the outer diameter D of the cylinder 2 The diameter is defined as a second diameter, and the first diameters corresponding to at least two heat exchange tubes in at least one layer of heat exchange tubes are different, and/or the second diameters corresponding to at least two heat exchange tubes in at least one layer of heat exchange tubes are different.
By the arrangement, the tube spacing between the heat exchange tubes on the same layer can be increased, the problem that the flow velocity of the shell pass medium is reduced due to filth blockage and scale blockage is solved, the blockage and scale resistance is enhanced, the overall volume of the coiled tube heat exchanger is not required to be increased, the cost can be reduced, the turbulence degree of the shell pass medium can be increased, and the heat exchange performance is enhanced.
In one embodiment, at least two of the heat exchange tubes in at least one layer have different corresponding first diameters, the first diameter of each heat exchange tube in the same layer is different from the first diameter of the adjacent heat exchange tube, and the inner side surfaces, close to the central cylinder, of the heat exchange tubes in the same layer form a wave shape; and/or at least two of the heat exchange tubes are different in diameter of the second corresponding to the heat exchange tube, the diameter of the second corresponding to each heat exchange tube is different from the diameter of the second corresponding to the adjacent heat exchange tube in the same layer, and the heat exchange tubes in the same layer are far away from the outer side surface of the central cylinder to form a wave shape.
So set up, can further strengthen the turbulent effect of shell side medium.
In one embodiment, the adjacent heat exchange tubes in the same layer of heat exchange tubes have the same spiral direction, and the adjacent heat exchange tubes have opposite spiral directions.
According to the arrangement, not only can the adjacent heat exchange tubes be prevented from interfering, but also the turbulence of the shell side medium between the heat exchange tubes can be strengthened, the heat exchange is strengthened, and the heat exchange efficiency is improved.
In one embodiment, the barrel assembly is provided with a tube pass inlet, a liquid separating assembly is arranged in the tube pass inlet, and the liquid separating assembly is connected to the inlet of each heat exchange tube.
So set up, can make the tube side medium distribute each said heat exchange tube evenly.
In one embodiment, the liquid distribution assembly is a distributor, a plurality of liquid distribution holes are formed in the distributor, and the liquid distribution holes are respectively communicated with the inlets of the heat exchange tubes in a one-to-one correspondence manner.
So set up, can make the tube side medium distribute each said heat exchange tube evenly.
In one embodiment, a tube pass outlet is formed in the cylinder assembly and communicated with the shell cavity, and a gas collection assembly is arranged in the tube pass outlet and connected to an outlet of each heat exchange tube.
By the arrangement, the tube side medium can be collected and flows into the refrigerating system to be operated next.
In one embodiment, a wrapping cylinder is arranged between the inner wall of the shell cavity and the heat exchange tube.
So set up, prevent that shell side medium from directly flowing to the other end of barrel between the inner wall in outermost heat exchange tube and shell chamber to influence the heat transfer effect, can reduce the frictional force that prevents between the inner wall of barrel and the heat exchange tube simultaneously, thereby prevent that the heat exchange tube from being broken by the friction and producing and leaking.
In one embodiment, the heat exchange tube is internally threaded.
So set up, can increase the heat transfer area of heat exchange tube.
In one embodiment, the cartridge assembly comprises a cartridge body, a first sealing cover and a second sealing cover, the first sealing cover and the second sealing cover are respectively arranged at two ends of the cartridge body, and the first sealing cover, the second sealing cover and the cartridge body enclose a shell cavity.
The invention also provides the following technical scheme:
a refrigeration system comprises the coiled heat exchanger.
Compared with the prior art, the wound tube heat exchanger provided by the invention has the advantages that the first diameter and/or the second diameter between at least two heat exchange tubes in at least one layer of heat exchange tubes are/is set to be different, so that the tube spacing between the heat exchange tubes in the same layer of heat exchange tubes is enhanced, the problem of increased flow resistance of a shell-side medium caused by filth blockage or dirt is solved, the turbulence degree of the shell-side medium can be enhanced, and the heat exchange effect is enhanced.
Drawings
FIG. 1 is a perspective view of a coiled heat exchanger provided by the present invention;
FIG. 2 is an enlarged view at C in FIG. 1;
FIG. 3 is a schematic structural view of a central tube and a heat exchange tube;
FIG. 4 isbase:Sub>A cross-sectional view taken at A-A of FIG. 3;
fig. 5 is a partial enlarged view at B in fig. 4;
fig. 6 is a side view of the central cartridge and heat exchange tube.
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 shell cavity; 12. a first shell-side adapter tube; 13. a second shell side connection pipe; 14. a barrel; 15. a first cover; 16. a second cover; 17. a tube side inlet; 18. a tube side outlet; 20. a central barrel; 30. a heat exchange pipe; 40. a liquid separating component; 41. a dispenser; 411. a liquid separation hole; 412. a capillary tube; 413. a liquid inlet head; 414. a liquid outlet head; 415. a liquid separating cone; 50. a gas collection assembly.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within 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, fig. 1 is a perspective view of a coiled heat exchanger 100 according to the present invention. The invention provides a coiled heat exchanger 100, and the coiled heat exchanger 100 is installed in a refrigeration system and used for exchanging heat. The coiled heat exchanger 100 may be used as both an evaporator and a condenser.
Specifically, the wound tube heat exchanger 100 includes a tube assembly 10, a central tube 20 and a heat exchange tube 30, a shell cavity 11 is provided in the tube assembly 10, the heat exchange tube 30 spirally and hierarchically surrounds the outside of the central tube 20, the central tube 20 and the heat exchange tube 30 are provided in the shell cavity 11, and the spiral shape can enhance the shock resistance of the heat exchange tube 30 and relieve the stretching stress caused by different temperatures. The shell cavity 11 is used for flowing shell side medium, and the heat exchange tube 30 is used for flowing tube side medium.
Further, the cylinder assembly 10 includes a cylinder 14, a first cover 15 and a second cover 16, the first cover 15 and the second cover 16 are respectively disposed at two ends of the cylinder 14, and the first cover 15, the second cover 16 and the cylinder 14 enclose a housing 11.
In other embodiments, the first cover 15 and the second cover 16 may be replaced by two covers (not shown), which are disc-shaped and respectively cover the two ends of the cylinder 14 and seal the housing 11, thereby saving cost.
The coiled heat exchanger 100 has a first end 101 and a second end 102 which are oppositely arranged, the cylinder assembly 10 is provided with a first shell-side connecting pipe 12 and a second shell-side connecting pipe 13, the first shell-side connecting pipe 12 and the second shell-side connecting pipe 13 are both communicated with the shell cavity 11, the first shell-side connecting pipe 12 is arranged near the second end 102, and the second shell-side connecting pipe 13 is arranged near the first end 101. A shell-side medium flows into the shell cavity 11 from the first shell-side connecting pipe 12, exchanges heat with a tube-side medium in the heat exchange tube 30, and then flows out from the second shell-side connecting pipe 13; alternatively, the shell-side medium flows from the second shell-side connection 13 into the shell chamber 11 and then flows from the first shell-side connection 12.
In this embodiment, the first shell-side connection tube 12 and the second shell-side connection tube 13 are both disposed on the cylinder 14, and in other embodiments, the first shell-side connection tube 12 and the second shell-side connection tube 13 may also be disposed on the second cover 16 and the first cover 15, respectively. In other embodiments, a suitable medium is selected to pass through the tube side and another medium passes through the shell side according to different properties of the media.
Continuing to refer to fig. 1, fig. 1 is a perspective view of a coiled heat exchanger 100 according to the present invention. The cylinder assembly 10 is provided with a tube pass inlet 17 and a tube pass outlet 18 for circulating a tube pass medium, and the tube pass inlet 17 and the tube pass outlet 18 can be opened on the first sealing cover 15 or the cylinder 14.
In this embodiment, the tube side inlet 17 and the tube side outlet 18 are both disposed on the first sealing cover 15, and the tube side inlet 17 and the tube side outlet 18 are located at the same end, so as to be suitable for a unit with tube side media entering and exiting from the same end. Of course, in other embodiments, the tube-side inlet 17 and the tube-side outlet 18 may be provided at different ends.
Specifically, a liquid separating assembly 40 is arranged in the tube pass inlet 17, the liquid separating assembly 40 is connected with the inlet of the heat exchange tube 30, and the liquid separating assembly 40 is used for uniformly distributing the tube pass medium to each heat exchange tube 30.
Preferably, a gas collecting assembly 50 is disposed in the tube side outlet 18, the gas collecting assembly 50 is connected to the outlets of the heat exchange tubes 30, and the gas collecting assembly 50 is configured to collect the tube side media flowing out of each heat exchange tube 30 and flow into the pipeline of the refrigeration system.
In this embodiment, both the liquid separating assembly 40 and the gas collecting assembly 50 are the distributor 41, the distributor 41 is provided with a plurality of liquid separating holes 411, the inlet of the heat exchange tube 30 is welded to the liquid separating holes 411 through the capillary tube 412, and the outlet of the heat exchange tube 30 is welded to the liquid separating holes 411 of the gas collecting assembly 50 through the capillary tube 412.
Referring to fig. 2, fig. 2 is an enlarged view of C in fig. 1. In the present embodiment, the dispenser 41 is a dispensing head. The liquid distribution head comprises a liquid inlet head 413, a liquid outlet head 414 and a liquid distribution cone 415, wherein the liquid inlet head 413, the liquid outlet head 414 and the liquid distribution cone 415 are integrally formed. The liquid separating cone 415 is positioned between the liquid inlet head 413 and the liquid outlet head 414, the liquid inlet head 413 is arranged in the tube pass inlet 17 or the tube pass outlet 18, a flow channel (not shown) is arranged in the liquid inlet head 413 and used for the inlet and outlet of a tube pass medium, the liquid outlet head 414 is positioned in the shell cavity 11, the liquid separating hole 411 is arranged on the liquid outlet head 414, the liquid separating hole 411 extends into the liquid separating cone 415 from the surface of the liquid outlet head 414 far away from the liquid separating cone 415 and is communicated with the flow channel of the liquid inlet head 413, and the axis of the liquid separating hole 411 is obliquely arranged relative to the axis of the liquid separating head so as to ensure that the tube pass medium is uniformly distributed. In other embodiments, the dispenser 41 may be a dispenser with a dispensing tray therein. When the liquid separation head is used as the liquid separation assembly 40, the tube-side medium enters from the liquid inlet 413 and flows out from the liquid outlet 414, and when the liquid separation head is used as the gas collection assembly 50, the tube-side medium enters from the liquid outlet 414 and flows out from the liquid inlet 413.
In other embodiments, the liquid separating assembly 40 and the gas collecting assembly 50 may also be tube plates (not shown) disposed in the tube side inlet 17 and the tube side outlet 18, the tube plates are provided with fixing holes (not shown), and the inlets of the heat exchange tubes 30 are expanded in the fixing holes of the tube plates. In other embodiments, the liquid separating assembly 40 may be a liquid head distributor 41 and the gas collecting assembly 50 may be a tube plate, or the liquid separating assembly 40 may be a tube plate, the gas collecting assembly 50 may be a distributor 41, and the gas collecting assembly 50 may not be disposed in the tube-side outlet 18.
In this embodiment, there is one tube-side inlet 17 and one tube-side outlet 18. In other embodiments, when the refrigeration system is a multi-system, the number of compressors is multiple, and the number of the tube-side inlets 17 and the number of the tube-side outlets 18 are multiple, and the multiple compressors are respectively connected to the tube-side inlets 17 or the tube-side outlets 18 in a one-to-one correspondence. When the coiled heat exchanger 100 is used as an evaporator, the plurality of compressors are respectively connected to the tube side outlet 18 in a one-to-one correspondence, and when the coiled heat exchanger 100 is used as a condenser, the plurality of compressors are respectively connected to the tube side inlet 17 in a one-to-one correspondence.
Specifically, a wrapping cylinder (not shown) is arranged between the outermost heat exchange tube 30 and the inner wall of the barrel 14, the wrapping cylinder is wound outside the outermost heat exchange tube 30 and is fixed on the inner wall of the barrel 14, the wrapping cylinder plays a role in guiding flow, and a shell side medium is prevented from directly flowing to the other end of the barrel 14 from between the outermost heat exchange tube 30 and the inner wall of the shell cavity 11, so that the heat exchange effect is influenced, meanwhile, the friction force between the inner wall of the barrel 14 and the heat exchange tube 30 can be reduced, and the heat exchange tube 30 is prevented from being broken by friction to generate leakage.
The inner wall of the heat exchange pipe 30 is provided with threads (not shown), which can increase the heat exchange area of the heat exchange pipe 30.
Referring to fig. 3, fig. 3 is a schematic structural view of the central cylinder 20 and the heat exchange tube 30. Each layer of the heat exchange tubes 30 includes a plurality of heat exchange tubes 30, and each heat exchange tube 30 is spirally wound in a cylindrical shape. That is, each heat exchange pipe 30 is spirally wound into a cylindrical spring-like structure.
Specifically, each layer of heat exchange tubes 30 is arranged at intervals, and adjacent heat exchange tubes 30 in the same layer of heat exchange tubes 30 are arranged at intervals, so that a shell-side medium can enter gaps between layers and gaps between tubes to exchange heat with the tube-side medium in the heat exchange tubes 30 sufficiently.
Referring to fig. 4 and 6, fig. 4 isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>A of fig. 3, and fig. 6 isbase:Sub>A side view of the central tube 20 and the heat exchange tube 30. The cylindrical spiral heat exchange tube 30 has a cylindrical inner diameter D corresponding to the heat exchange tube 1 Defined as a first diameter, i.e., the diameter of the cylinder corresponding to the inner sidewall of the spiral heat exchange tube 30 is defined as a first diameter, and the outer diameter D of the cylinder corresponding to the cylindrical spiral heat exchange tube 30 is defined as a first diameter 2 A second diameter, that is, the diameter of the cylinder corresponding to the outer sidewall of the spiral heat exchange tube 30 is defined as the second diameter, that is, the projection of the heat exchange tube 30 is a circular ring shape when viewed from the side view of the heat exchange tube 30, the inner diameter of the circular ring is defined as the first diameter, and the outer diameter is defined as the second diameter; at least two heat exchange tubes 30 in at least one layer of heat exchange tubes 30 have different corresponding first diameters; or, the corresponding second diameters of at least two of the heat exchange tubes 30 are different; or at least two heat exchange tubes 30 in at least one layer of heat exchange tubes 30 have different corresponding first diameters, and at least two heat exchange tubes 30 in at least one layer of heat exchange tubes 30 have different corresponding second diameters.
It can be understood that, with such an arrangement, the tube spacing between the heat exchange tubes 30 on the same layer can be increased, the gap between the heat exchange tubes 30 on adjacent layers cannot be increased, the problem of the flow velocity reduction of the shell side medium caused by filth blockage and dirt blockage is alleviated, and the tube spacing between the heat exchange tubes 30 on the same layer is increased under the condition that the whole volume of the tubular heat exchanger 100 is not changed, so that the cost can be reduced, meanwhile, the turbulence degree of the shell side medium can be increased, and the heat exchange performance is enhanced.
Further, in one of the embodiments, the heat exchange tubes 30 in the same layer of heat exchange tubes 30 have a first diameter different from that of the adjacent heat exchange tubes 30, so that a plurality of heat exchange tubes 30 in the same layer of heat exchange tubes 30 form a wave shape near the outer side surface of the central cylinder 20. With the arrangement, the tube spacing between each heat exchange tube 30 on the same layer and the adjacent heat exchange tube 30 can be increased, so that the turbulence degree of the shell side medium is further enhanced.
In another embodiment, the heat exchange tubes 30 in the same layer of heat exchange tubes 30 have a second diameter different from that of the adjacent heat exchange tubes 30, and the outer side surfaces of the heat exchange tubes 30 of the same layer of heat exchange tubes 30 away from the central cylinder 20 are wavy. Due to the arrangement, the tube space between each heat exchange tube 30 on the same layer and the adjacent heat exchange tubes 30 can be enlarged, and the turbulence degree of the shell side medium can be further enhanced.
Preferably, please refer to fig. 5, fig. 5 is a partial enlarged view of a portion B in fig. 4. In the present embodiment, the wall thickness of each heat exchange tube 30 is equal, the first diameter of the heat exchange tube 30 in the same layer of heat exchange tubes 30 is different from the first diameter of the adjacent heat exchange tube 30, the second diameter of the heat exchange tube 30 in the same layer of heat exchange tubes 30 is different from the second diameter of the adjacent heat exchange tube 30, and the first diameter of each adjacent heat exchange tube 30 in each layer of heat exchange tubes 30 is different, that is, the heat exchange tubes 30 in the same layer of heat exchange tubes 30 are alternately arranged in a staggered manner, so that the turbulent flow effect when the tube pass medium flows can be further enhanced. In addition, in the same layer of heat exchange tubes 30, the first diameter and the second diameter of the first heat exchange tube 30, the third heat exchange tube 30, the fifth heat exchange tube 30 and the odd number of heat exchange tubes 30 are respectively equal, and the first diameter and the second diameter of the second heat exchange tube 30, the fourth heat exchange tube 30, the sixth heat exchange tube 30 and the even number of heat exchange tubes 30 are respectively equal, so that the turbulence degree of the shell side medium can be enhanced, the shell side medium forms three-dimensional turbulence in the layer gap of each layer of heat exchange tubes 30, and the process can be simplified. Of course, in other embodiments, the wall thickness of each heat exchange tube 30 may also be arranged to be unequal; the heat exchange tubes 30 in the same layer of heat exchange tubes 30 may also be arranged such that the first diameter or the second diameter of the first heat exchange tube 30, the fifth heat exchange tube 30, and the ninth heat exchange tube 30 are respectively equal, the first diameter or the second diameter of the second heat exchange tube 30, the sixth heat exchange tube 30, and the tenth heat exchange tube 30 are respectively equal, and the first diameter or the second diameter of the third heat exchange tube 30, the seventh heat exchange tube 30, and the eleventh heat exchange tube 30 are respectively equal; alternatively, the first diameters of any two adjacent heat exchange tubes 30 among the one, two, three, or three or more layers of heat exchange tubes 30 are set to be different.
Further, the spiral directions of the adjacent heat exchange tubes 30 are opposite, so that the turbulence degree of shell-side media among the heat exchange tubes 30 can be enhanced, the heat exchange is enhanced, and the heat exchange efficiency is improved.
The adjacent heat exchange tubes 30 in the same layer have the same spiral direction, and the adjacent heat exchange tubes 30 can be prevented from interfering.
The invention also provides a refrigeration system comprising the coiled heat exchanger 100. When the coiled heat exchanger 100 is used as an evaporator, the inlet of the coiled heat exchanger 100 is connected to a throttle valve (not shown), and the outlet is connected to a gas-liquid separator or a compressor (not shown); when the coiled heat exchanger 100 is used as a condenser, the inlet of the coiled heat exchanger 100 is connected to a compressor and the outlet is connected to a throttle valve.
The low-temperature low-pressure gas refrigerant enters the compressor from an air suction port of the compressor, is changed into high-temperature high-pressure gas refrigerant by the work of the compressor, is discharged from an air exhaust port of the compressor and enters the condenser, the high-temperature high-pressure gas refrigerant exchanges heat in the condenser to be changed into high-temperature high-pressure liquid refrigerant, is throttled into a low-temperature low-pressure gas-liquid two-phase state by the throttle valve, enters the evaporator to absorb heat and evaporate, enters the compressor, and the cycle is repeated.
During the operation of the coiled heat exchanger 100, the tube-side medium enters from the liquid separating assembly 40, is uniformly distributed by the liquid separating assembly 40, enters each heat exchange tube 30 to exchange heat with the shell-side medium, and enters the gas collecting assembly 50 to be converged after heat exchange. The shell side medium flows in the gaps of the heat exchange tubes 30 of each layer and the gaps between the adjacent heat exchange tubes 30 of the same layer, so that three-dimensional turbulence is formed, and the heat exchange performance is strong.
According to the invention, the heat exchange tubes 30 on the same layer are arranged in a staggered manner, so that the inner side surface and/or the outer side surface of the heat exchange tubes 30 on the same layer form a corrugated shape, and when a shell side medium flows, the turbulent flow effect can be enhanced, so that the shell side medium forms a three-dimensional turbulent flow, and the heat exchange performance is improved.
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 express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A wound tube type heat exchanger comprises a barrel assembly (10), a central tube (20) and heat exchange tubes (30), wherein a shell cavity (11) for accommodating shell-side media is formed in the barrel assembly (10), the central tube (20) is arranged in the shell cavity (11), the central tube (20) surrounds a plurality of layers of heat exchange tubes (30) in an external spiral manner, and the heat exchange tubes (30) are used for accommodating tube-side media;
the heat exchange tube is characterized in that each layer of heat exchange tube (30) comprises a plurality of heat exchange tubes (30), each heat exchange tube (30) is wound into a cylindrical spiral shape, and the inner diameter D of the cylinder corresponding to the heat exchange tube (30) in the cylindrical spiral shape 1 A cylindrical spiral of said heat exchange tube (30) having a cylindrical outer diameter D defined as a first diameter 2 Defined as a second diameter, and at least two of said heat exchange tubes (30) of at least one layerThe heat exchange tubes (30) have different corresponding first diameters, and/or at least one layer of the heat exchange tubes (30) have different corresponding second diameters of at least two heat exchange tubes (30).
2. The wound tube heat exchanger according to claim 1, wherein at least two of the heat exchange tubes (30) in at least one layer have different corresponding first diameters, and each of the heat exchange tubes (30) in the same layer has a different corresponding first diameter from the adjacent heat exchange tube (30), and the inner side surfaces, close to the central cylinder (20), of the heat exchange tubes (30) in the same layer are formed into a wave shape; and/or at least two of the heat exchange tubes (30) in at least one layer have different corresponding second diameters, each of the heat exchange tubes (30) in the same layer has different corresponding second diameter with the adjacent heat exchange tube (30), and a plurality of the heat exchange tubes (30) in the same layer are far away from the outer side surface of the central cylinder (20) to form a wave shape.
3. The coiled heat exchanger according to claim 1, wherein adjacent ones (30) of the heat exchange tubes (30) in the same layer have the same spiral direction, and adjacent ones (30) of the heat exchange tubes in the adjacent layer have opposite spiral directions.
4. The coiled tube heat exchanger according to claim 1, wherein the cylinder assembly (10) is provided with a tube pass inlet (17), a liquid separating assembly (40) is arranged in the tube pass inlet (17), and the liquid separating assembly (40) is connected to the inlet of each heat exchange tube (30).
5. The coiled heat exchanger according to claim 4, wherein the liquid distribution assembly (40) is a distributor (41), a plurality of liquid distribution holes (411) are formed in the distributor (41), and the plurality of liquid distribution holes (411) are respectively communicated with the inlets of the heat exchange tubes (30) in a one-to-one correspondence manner.
6. The coiled heat exchanger of claim 1, wherein the barrel assembly (10) is provided with a tube-pass outlet (18), the tube-pass outlet (18) is communicated with the shell cavity (11), a gas collecting assembly (50) is arranged in the tube-pass outlet (18), and the gas collecting assembly (50) is connected to an outlet of each heat exchange tube (30).
7. A wound tube heat exchanger according to claim 1, wherein a packing is provided between the inner wall of the shell chamber (11) and the heat exchange tube (30).
8. A wound tube heat exchanger according to claim 1, wherein the heat exchange tube (30) is internally threaded.
9. The coiled heat exchanger according to claim 1, wherein the cylinder assembly (10) comprises a cylinder (14), a first cover (15) and a second cover (16), the first cover (15) and the second cover (16) are respectively arranged at two ends of the cylinder (14), and the first cover (15), the second cover (16) and the cylinder (14) are enclosed to form a shell cavity (11).
10. A refrigeration system comprising a coiled heat exchanger according to any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111003469.7A CN115727573A (en) | 2021-08-30 | 2021-08-30 | Coiled tube type heat exchanger and refrigerating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111003469.7A CN115727573A (en) | 2021-08-30 | 2021-08-30 | Coiled tube type heat exchanger and refrigerating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115727573A true CN115727573A (en) | 2023-03-03 |
Family
ID=85290748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111003469.7A Pending CN115727573A (en) | 2021-08-30 | 2021-08-30 | Coiled tube type heat exchanger and refrigerating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115727573A (en) |
-
2021
- 2021-08-30 CN CN202111003469.7A patent/CN115727573A/en active Pending
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