CN219415820U - Shell-and-tube heat exchanger with double-loop structure - Google Patents

Abstract

The utility model discloses a shell-and-tube heat exchanger with a double-loop structure, which comprises a shell, a water inlet pipe and a water outlet pipe, wherein the water inlet pipe and the water outlet pipe are arranged on the shell, two groups of heat exchange tube bundle groups are arranged in the shell, two groups of refrigerant channel groups are arranged at one end of the shell, and the two groups of refrigerant channel groups are communicated with the two groups of heat exchange tube bundle groups in a one-to-one correspondence manner to form two refrigerant loops. The heat exchange tube bundle group consists of a plurality of small-diameter U-shaped tube bundles, the refrigerant medium is dispersed into the plurality of U-shaped tube bundles to flow, the heat exchange contact area is increased, the heat exchange effect of the heat exchanger is better, the heat exchange rate is improved, the flow of the refrigerant medium in the shell is realized by adopting two independent refrigerant loops, the heat transfer effect is good, the distribution of the refrigerant medium is more balanced by adopting the double-loop design, and the other loop can be continuously used when one loop has a problem.

Description

Shell-and-tube heat exchanger with double-loop structure

Technical Field

The utility model belongs to the technical field of heat exchangers, and particularly relates to a shell-and-tube heat exchanger with a double-loop structure.

Background

Shell and tube (or shell and tube) heat exchangers are the most widely used conventional heat exchangers. The most basic structure is that a plurality of small pipes for heat exchange are added in a round shell, and when the heated heating medium is steam, the shell-and-tube steam-water heat exchanger is called; when the heating medium is high-temperature water, the shell-tube water-water heat exchanger is called, and the water-water heat exchanger is also called a sectional water-water heat exchanger because the inside and outside of the heat exchange small tube are water, the water flow rates at the two sides of the small tube are close, the diameter of the circular shell cannot be too large, and when the heating area requirement is large, a plurality of sections are connected. Their specific construction is described later. Such heat exchangers are commonly used in hot water heating systems, low temperature water air conditioning systems and certain process waters for producing hot water for continuity. As domestic hot water supply, a water storage tank is provided. However, when the existing shell-and-tube heat exchanger is used, the heat exchange rate is low, and the overall heat exchange effect is not ideal.

Disclosure of Invention

The utility model aims to provide a technical scheme of a shell-and-tube heat exchanger with a double-loop structure, aiming at the defects of the prior art, the heat exchanger is ingenious and reasonable in structural design and strong in practicability, a heat exchange tube bundle group consists of a plurality of small-diameter U-shaped tube bundles, refrigerant media are dispersed into a plurality of U-shaped tube bundles to flow, the heat exchange contact area is increased, the heat exchange effect of the heat exchanger is better, the heat exchange rate is improved, two independent refrigerant loops are adopted to realize the flow of the refrigerant media in a shell, the heat transfer effect is good, the distribution of the refrigerant media is more balanced due to the design of the double loops, and when one loop has a problem, the other loop can be continuously used.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model provides a double loop structure shell and tube heat exchanger, includes casing and inlet tube and outlet pipe of setting on the casing, its characterized in that: two groups of heat exchange tube bundle groups are arranged in the shell, two groups of refrigerant channel groups are arranged at one end of the shell, and the two groups of refrigerant channel groups are communicated with the two groups of heat exchange tube bundle groups in a one-to-one correspondence manner to form two refrigerant loops; two heat transfer tube bank groups and two refrigerant channel groups one-to-one to can form two refrigerant loops, realize the flow heat transfer of refrigerant medium in the casing through two solitary refrigerant loops, can effectively ensure whole heat exchanger's heat transfer effect, and adopt two solitary refrigerant loops to realize the flow of refrigerant medium at the casing, heat transfer effect is good, and the design of two loops makes the distribution of refrigerant medium more balanced, and when one of them return circuit goes wrong in addition, another return circuit also can continue to use.

Further, the bottom of casing is provided with the support bracket, be provided with fixed slotted hole on the support bracket, the port department of inlet tube and outlet pipe all is provided with flange, the steady of whole heat exchanger is ensured to the support bracket and is placed, improve overall structure steadiness and security, the design of fixed slotted hole can be convenient for the heat exchanger with place the face between the installation fixed, reasonable in design, the installation is dismantled conveniently simply, and be convenient for actual operation, and fixed slotted hole is rectangular shape design, have certain adjustment scope, thereby the actual installation location of being more convenient for, flange's design can be convenient for the inlet tube, the outlet pipe is fixed with the connection between other pipelines.

Further, a baffle plate is arranged in the shell, the heat exchange tube bundle group is arranged on the baffle plate in a penetrating way, and the baffle tubes are used for reinforcing and supporting the heat exchange tube bundle group, so that the structure of the heat exchange tube bundle group in the shell is more stable, meanwhile, the flow direction of a substance to be heat exchanged in the shell can be regulated through the baffle plate, the flow path of the substance to be heat exchanged in the shell is prolonged, and the substance to be heat exchanged is fully contacted with a refrigerant medium, so that heat exchange is more fully carried out, and the actual heat exchange rate and heat exchange effect are effectively ensured;

the baffle includes first baffle and second baffle, first baffle and second baffle interval staggered distribution are inside the casing, the top of first baffle, the bottom of second baffle all with the inner wall fixed connection of casing, the bottom of first baffle and the top of second baffle all are provided with the breach, form the runner between breach and the shells inner wall, structural design is ingenious reasonable, adopt the design of first baffle and the second baffle of interval staggered distribution, increase the vortex effect of treating the heat transfer material, make the flow direction that treats the heat transfer material and form like ripple in the casing, increase heat transfer area, improve heat transfer efficiency.

Further, the one end of casing is provided with end apron and tube sheet, coolant channel group sets up on the end apron, end apron passes through bolt assembly and tube sheet fixed connection, be provided with sealed pad between end apron and the tube sheet, tube sheet and casing fixed connection, the fixed setting of one end of heat transfer tube bank group is on the tube sheet, structural design is compact reasonable, the tube sheet is fixed the one end of heat transfer tube bank group, heat transfer tube bank group comprises many U type tube bundles, be provided with the mounting hole on the tube sheet and be used for the installation of U type tube bundle to be fixed, end apron is used for the setting of coolant channel group, be equipped with corresponding connecting hole on end apron and the tube sheet, connecting hole cooperation bolt assembly realizes the installation between end apron and the tube sheet is fixed, effectively ensure the connection fastness between end apron and the tube sheet, simultaneously, still set up sealed pad between end apron and the tube sheet, can increase the connection fastness and the compactness between end apron and the tube sheet through sealed pad, avoid the seepage of junction, structural security performance is improved, and all set up the connecting hole in the outside and center department, from middle part and outside fixed connection end apron and tube sheet, effectively ensure joint intensity and tightness simultaneously.

Further, the refrigerant channel group comprises a refrigerant inlet channel and a refrigerant outlet channel which are communicated with the heat exchange tube bundle group, a refrigerant medium enters the corresponding heat exchange tube bundle group from the refrigerant inlet channel and is discharged from the refrigerant outlet channel, and a refrigerant loop is formed among the corresponding refrigerant inlet channel, the heat exchange tube bundle group and the refrigerant outlet channel, so that the design is reasonable.

Further, the end cover plate is provided with a liquid inlet cavity opposite to the refrigerant inlet channel, the refrigerant inlet channel is communicated with the liquid inlet cavity, the end cover plate is provided with an air collecting cavity opposite to the refrigerant outlet channel, the air collecting cavity is communicated with the refrigerant outlet channel, the liquid inlet cavity is internally provided with a liquid separating component, refrigerant medium enters the liquid inlet cavity from the refrigerant inlet channel and then enters the heat exchange tube bundle group from the liquid inlet cavity, enters the refrigerant outlet channel from the air collecting cavity and is discharged through the refrigerant outlet channel, a liquid separating component is further arranged in the liquid inlet cavity, the refrigerant medium entering the liquid inlet cavity is subjected to split treatment through the liquid separating component, and then enters the U-shaped tube bundles after being split, so that the impact force of the refrigerant medium is effectively lightened, the refrigerant medium is more convenient to stably enter the heat exchange tube bundle group, the medium is uniformly distributed into the heat exchanger, the heat efficiency of the heat exchanger can be improved, and the heat transfer quantity is increased.

Further, the liquid separation assembly comprises a first liquid separation plate and a second liquid separation plate, first liquid separation holes are formed in the first liquid separation plate, the first liquid separation holes are uniformly distributed in the first liquid separation plate, second liquid separation holes are formed in the second liquid separation plate, the second liquid separation holes are uniformly distributed in the second liquid separation plate, the aperture of the first liquid separation holes is larger than that of the second liquid separation holes, the number of the first liquid separation holes is smaller than that of the second liquid separation holes, two liquid separation plates are adopted to realize two-stage flow separation, refrigerant media in a liquid inlet cavity are firstly subjected to primary flow separation treatment of the first liquid separation plate, the media are continuously conveyed to the second liquid separation plate after being subjected to flow separation through the first liquid separation holes, the secondary flow separation treatment is carried out in a heat exchange tube bundle group of the heat exchanger, uniform distribution of the refrigerant media can be realized through the two-stage flow separation treatment, so that heat transfer area of the heat exchanger is fully utilized, the aperture and the number of the second liquid separation holes are gradually changed from the first liquid separation holes to the second liquid separation holes are further reasonable, buffering of the whole flow separation process is realized, the safety and the practical flow separation process is improved.

Further, coolant inlet channel and coolant outlet channel are the distribution cover, the one end of distribution cover is provided with the interface, the other end of distribution cover is provided with the grafting section, and all be provided with the draw-in groove in inlet chamber and the air collecting chamber, the grafting section matches and sets up in corresponding draw-in groove, install the distribution cover on the inlet chamber and contradict with the branch liquid subassembly, the interface, distribution cover and grafting section are integrated into one piece structure, ensure the overall structural strength of distribution cover, the distribution cover is the loudspeaker form structure that one end is big one end is little, the interface sets up in the throat department of distribution cover, grafting section sets up in the flaring department of distribution cover, grafting section cooperation draw-in groove, realize the location between distribution cover and inlet chamber, the air collecting chamber, and ensure that the distribution cover that installs on the inlet chamber is inconsistent with the branch liquid subassembly, design benefit, the actual equipment location of being more convenient for, coolant medium enters into corresponding distribution cover from distribution cover miniport to big port flow, after the preliminary buffering guide of distribution cover, reentrant into the inlet chamber, reentrant into the heat exchanger after the branch liquid subassembly reposition of unit flow, make the medium evenly flow into the heat exchanger, and the medium is equitable when the heat exchanger is flowed out from the distribution cover, the inlet channel is concentrated through the inlet channel, concentrate medium is concentrated through the design, concentrate medium is concentrated into the air collecting medium, concentrate flow in the distribution cover, concentrate medium is more concentrate flow, and more concentrate medium is discharged into the air collecting medium through the air collecting channel when the distribution cover, concentrate medium is more concentrate through the distribution cover, and more concentrate medium is more than concentrate through the port, and more concentrate medium. The split type structure can be adopted between the distribution cover and the end cover plate, the distribution cover and the end cover plate are assembled into a whole through welding and fixing, the distribution cover and the end cover plate can also be integrally cast, the fixing mode is not limited, and the distribution cover and the end cover plate can be selectively adjusted according to actual requirements.

Further, the refrigerant inlet channel and the refrigerant outlet channel are both distribution covers, one end of each distribution cover is provided with an interface, the other end of each distribution cover is provided with a plugging section, clamping grooves are arranged in each liquid inlet cavity and each gas collecting cavity, the plugging sections are arranged in the corresponding clamping grooves in a matching way, a gap buffer cavity is formed between the distribution cover arranged on each liquid inlet cavity and each liquid distribution assembly, the interface, the distribution cover and the plugging sections are of an integrated structure, the integral structural strength of the distribution cover is ensured, the distribution cover is of a horn-shaped structure with one large end and one small end, the interface is arranged at the necking part of the distribution cover, the plugging sections are arranged at the flaring part of the distribution cover, the plugging sections are matched with the clamping grooves to realize the positioning between the distribution cover and the liquid inlet cavity and the gas collecting cavity, the design is ingenious, the actual assembly and positioning are more convenient, refrigerant medium enters the corresponding distribution cover and flows from the small port to the large port of the distribution cover, the refrigerant medium which is buffered and flowed out by the distribution cover is required to be further buffered and guided by the gap buffer cavity and then contacted with the liquid distribution component, the refrigerant medium is uniformly flowed into the heat exchanger after being split by the liquid distribution component, the impact force of the refrigerant medium on the liquid distribution component can be reduced by the buffer effect of the gap buffer cavity, when the refrigerant medium flows out from the heat exchange tube bundle group, the refrigerant medium firstly enters the air collecting cavity, enters the corresponding distribution cover through the air collecting cavity, flows from the big port to the small port of the distribution cover, is concentrated and converged into the distribution cover through the convergence and concentration effect of the distribution cover, is concentrated and discharged through the interface on the distribution cover, the design is reasonable, and is more beneficial to the discharge of the refrigerant medium. The split type structure can be adopted between the distribution cover and the end cover plate, the distribution cover and the end cover plate are assembled into a whole through welding and fixing, the distribution cover and the end cover plate can also be integrally cast, the fixing mode is not limited, and the distribution cover and the end cover plate can be selectively adjusted according to actual requirements.

Further, the refrigerant inlet channel and the refrigerant outlet channel are pipe joints, the pipe joints and the end cover plate are of an integrated structure, the refrigerant inlet channel and the refrigerant outlet channel are pipe joints, the design is simple and reasonable, the pipe joints and the end cover body are of an integrated structure, the integral structural strength is effectively ensured, the end cover plate can resist the impact of a medium, and meanwhile, the practical processing and forming are convenient.

Due to the adoption of the technical scheme, the utility model has the following beneficial effects:

the heat exchange tube bundle group consists of a plurality of small-diameter U-shaped tube bundles, the refrigerant medium is dispersed into the plurality of U-shaped tube bundles to flow, the heat exchange contact area is increased, the heat exchange effect of the heat exchanger is better, the heat exchange rate is improved, the flow of the refrigerant medium in the shell is realized by adopting two independent refrigerant loops, the heat transfer effect is good, the distribution of the refrigerant medium is more balanced by adopting the double-loop design, and the other loop can be continuously used when one loop has a problem.

Drawings

The utility model is further described below with reference to the accompanying drawings:

FIG. 1 is a schematic diagram of a first embodiment of the present utility model;

FIG. 2 is a schematic diagram of an explosion structure according to a first embodiment of the present utility model;

FIG. 3 is a schematic view of a flow path of a refrigerant medium and a substance to be heat exchanged in a housing according to a first embodiment of the present utility model;

FIG. 4 is a schematic view showing the mounting structure between the liquid separation module and the end cover plate according to the first embodiment of the present utility model;

FIG. 5 is a schematic view of the internal cross-sectional structure of FIG. 4;

FIG. 6 is a schematic diagram of the explosive structure of FIG. 4;

FIG. 7 is a schematic view of an end cover plate according to an embodiment of the utility model;

FIG. 8 is a schematic view of a distribution cover according to a first embodiment of the present utility model;

FIG. 9 is a schematic view showing the mounting structure between the distribution cap and the end cap plate in the second embodiment of the present utility model;

FIG. 10 is a schematic view of the internal cross-sectional structure of FIG. 9;

FIG. 11 is a schematic structural view of a three-terminal cover plate according to an embodiment of the present utility model;

FIG. 12 is a schematic view of the internal cross-sectional structure of FIG. 11;

fig. 13 is a schematic diagram of a position structure of a liquid inlet chamber and a gas collecting chamber on an end cover plate in the third embodiment of the present utility model.

In the figure: 1-a housing; 2-a water inlet pipe; 3-a water outlet pipe; 4-a heat exchange tube bundle group; 5-supporting brackets; 6-a fixed slot; 7-end cover plates; 8-tube plate; 9-a gasket; 10-a refrigerant inlet passage; 11-a refrigerant outlet passage; 12-first-stage liquid separation plate; 13-second-stage liquid separating plate; 14-first-stage separation of liquid holes; 15-second-stage separation liquid holes; 16-a dispensing cap; 17-interface; 18-a first baffle; 19-a second baffle; 20-inserting section; 21-a clamping groove; 22-refrigerant medium flow path; 23-a material flow path to be heat exchanged; 24-connecting flanges; 25-a liquid inlet cavity; 26-an air collection cavity; 27-a gap buffer chamber; 28-pipe joint.

Detailed Description

As shown in fig. 1 to 8, in a first embodiment of the present utility model, the heat exchanger comprises a housing 1, a water inlet pipe 2 and a water outlet pipe 3 disposed on the housing 1, two heat exchange tube bundle groups 4 are disposed in the housing 1, two refrigerant channel groups are disposed at one end of the housing 1, and the two refrigerant channel groups are in one-to-one correspondence with the two heat exchange tube bundle groups 4 to form two refrigerant loops; the two groups of heat exchange tube bundles 4 are in one-to-one correspondence with the two groups of refrigerant channel groups, so that two refrigerant loops can be formed, the flowing heat exchange of the refrigerant medium in the shell 1 can be realized through the two independent refrigerant loops, the heat exchange effect of the whole heat exchanger can be effectively ensured, the flow of the refrigerant medium in the shell 1 is realized by adopting the two independent refrigerant loops, the heat transfer effect is good, the distribution of the refrigerant medium is more balanced due to the design of the double loops, and the other loop can be continuously used when one loop has a problem.

The bottom of casing 1 is provided with support bracket 5, be provided with fixed slotted hole 6 on the support bracket 5, the port department of inlet tube 2 and outlet pipe 3 all is provided with flange 24, support bracket 5 ensures that the steady of whole heat exchanger is placed, improve overall structure steadiness and security, the design of fixed slotted hole 6 can be convenient for the heat exchanger with place the face between the installation fixed, reasonable in design, the installation is dismantled conveniently simply, and be convenient for actual operation, and fixed slotted hole 6 is rectangular shape design, have certain adjustment range, thereby be convenient for more actual installation location, flange 24's design can be convenient for inlet tube 2, outlet pipe 3 and other connection between the pipeline are fixed.

The shell 1 is internally provided with the baffle plate, the heat exchange tube bundle group 4 is arranged on the baffle plate in a penetrating way, and the baffle pipes are used for reinforcing and supporting the heat exchange tube bundle group 4, so that the structure of the heat exchange tube bundle group 4 in the shell 1 is more stable, meanwhile, the flow direction of a substance to be heat exchanged in the shell 1 can be regulated through the baffle plate, the flow path of the substance to be heat exchanged in the shell 1 is prolonged, the substance to be heat exchanged is fully contacted with a refrigerant medium, so that heat exchange is more fully carried out, and the actual heat exchange rate and heat exchange effect are effectively ensured;

the baffle includes first baffle 18 and second baffle 19, first baffle 18 and second baffle 19 interval staggered distribution are inside casing 1, the top of first baffle 18, the bottom of second baffle 19 all with the inner wall fixed connection of casing 1, the bottom of first baffle 18 and the top of second baffle 19 all are provided with the breach, form the runner between breach and the casing 1 inner wall, structural design is ingenious reasonable, adopt the design of first baffle 18 and the second baffle 19 of interval staggered distribution, increase the vortex effect of treating the heat transfer material, make the flow direction that the heat transfer material forms the ripple-like in casing 1, increase heat transfer area, improve heat transfer efficiency.

The one end of casing 1 is provided with end apron 7 and tube sheet 8, coolant channel group sets up on end apron 7, end apron 7 passes through bolt assembly and tube sheet 8 fixed connection, be provided with sealed 9 between end apron 7 and the tube sheet 8, tube sheet 8 and casing 1 fixed connection, the fixed setting of one end of heat exchange tube bank group 4 is on tube sheet 8, structural design is compact reasonable, tube sheet 8 fixes the one end of heat exchange tube bank group 4, heat exchange tube bank group 4 comprises many U type tube bundles, be provided with the mounting hole on tube sheet 8 and be used for the installation of U type tube bundle to be fixed, end apron 7 is used for coolant channel group's setting, be equipped with the connecting hole that corresponds on end apron 7 and the tube sheet 8, connecting hole cooperation bolt assembly realizes the installation between end apron 7 and the tube sheet 8 is fixed, effectively ensure the connection fastness between end apron 7 and the tube sheet 8, simultaneously, still set up sealed 9 between end apron 7 and the tube sheet 8, can increase the connection fastness and the compactness between end apron 7 and the tube sheet 8, avoid the seepage of junction, improve the structure security performance, and set up from the outside and the center department in end apron 7, the tube sheet 8, joint strength has been guaranteed from connecting hole and outside fixed connection strength and outside joint tightness, simultaneously.

The refrigerant channel group comprises a refrigerant inlet channel 10 and a refrigerant outlet channel 11 which are communicated with the heat exchange tube bundle group 4, a refrigerant medium enters the corresponding heat exchange tube bundle group 4 from the refrigerant inlet channel 10 and is discharged from the refrigerant outlet channel 11, and a refrigerant loop is formed among the corresponding refrigerant inlet channel 10, the heat exchange tube bundle group 4 and the refrigerant outlet channel 11, so that the design is reasonable.

The end cover plate 7 is provided with the liquid inlet cavity 25 right opposite to the refrigerant inlet channel 10, the refrigerant inlet channel 10 is communicated with the liquid inlet cavity 25, the end cover plate 7 is provided with the gas collecting cavity 26 right opposite to the refrigerant outlet channel 11, the gas collecting cavity 26 is communicated with the refrigerant outlet channel 11, the liquid inlet cavity 25 is internally provided with the liquid distribution component, the refrigerant medium enters the liquid inlet cavity 25 from the refrigerant inlet channel 10 and then enters the heat exchange tube bundle group 4 from the liquid inlet cavity 25, then enters the refrigerant outlet channel 11 from the gas collecting cavity 26 and is discharged through the refrigerant outlet channel 11, the liquid distribution component is further arranged in the liquid inlet cavity 25, the refrigerant medium entering the liquid inlet cavity 25 is subjected to split treatment, and then enters the U-shaped tube bundles after being split, so that the impact force of the refrigerant medium is effectively reduced, the refrigerant medium is more convenient to stably enter the heat exchange tube bundle group 4, the medium is uniformly distributed into the heat exchanger, the heat efficiency of the heat exchanger can be improved, and the heat transfer quantity is increased.

The liquid separation assembly comprises a first liquid separation plate 12 and a second liquid separation plate 13, wherein first liquid separation holes 14 are formed in the first liquid separation plate 12, the first liquid separation holes 14 are uniformly distributed in the first liquid separation plate 12, second liquid separation holes 15 are formed in the second liquid separation plate 13, the second liquid separation holes 15 are uniformly distributed in the second liquid separation plate 13, the aperture of the first liquid separation holes 14 is larger than that of the second liquid separation holes 15, the number of the first liquid separation holes 14 is smaller than that of the second liquid separation holes 15, two liquid separation plates are adopted to realize two-stage flow separation, refrigerant media entering the liquid inlet cavity 25 are subjected to primary flow separation treatment of the first liquid separation plate 12, the media are continuously conveyed to the second liquid separation plate after being subjected to secondary flow separation treatment of the first liquid separation holes, the media enter the heat exchange tube bundle assembly 4 of the heat exchanger after being subjected to secondary flow separation treatment of the second liquid separation holes, the uniform distribution of the refrigerant media can be realized, therefore, the heat transfer area of the heat exchanger is fully utilized, the aperture and the number of the first liquid separation holes 14 are larger than that of the second liquid separation holes 15 are realized, the whole flow separation process is gradually changed reasonably, the flow separation process is realized, the rationality is improved, and the practical flow separation process is also improved, and the flow separation process is improved.

The refrigerant inlet channel 10 and the refrigerant outlet channel 11 are both the distribution cover 16, one end of the distribution cover 16 is provided with the interface 17, the other end of the distribution cover 16 is provided with the inserting section 20, the liquid inlet cavity 25 and the air collecting cavity 26 are both internally provided with the clamping grooves 21, the inserting section 20 is matched and arranged in the corresponding clamping grooves 21, the distribution cover 16 arranged on the liquid inlet cavity 25 is in contact with the liquid distribution assembly, the interface 17, the distribution cover 16 and the inserting section 20 are of an integrated structure, the integral structural strength of the distribution cover 16 is ensured, the distribution cover 16 is of a horn-shaped structure with one large end and one small end, the interface 17 is arranged at the necking part of the distribution cover 16, the inserting section 20 is arranged at the flaring part of the distribution cover 16, the inserting section 20 is matched with the clamping grooves 21, the distribution cover 16 and the liquid inlet cavity 25 and the air collecting cavity 26 are realized, the distribution cover 16 arranged on the liquid inlet cavity 25 is in contact with the liquid distribution assembly, the design is ingenious, the actual assembly positioning is facilitated, the refrigerant medium enters the corresponding distribution cover 16, the small port of the distribution cover 16 flows to the large port, the distribution cover 16 is guided by the initial buffer of the distribution cover 16, the distribution cover 16 enters the liquid inlet cavity 25 and the liquid collector and the small port of the distribution cover 16, the heat exchanger is led to the medium flows out of the medium collector through the small port of the distribution cover 16, the heat exchanger, the refrigerant medium flows into the medium collector and the medium flow into the air collector 16, the small port of the air collector medium flows into the air cavity 16 through the air collector and the air collector, and the medium flows into the small port 16, and the medium flow medium collector medium flows into the medium collector medium through the distribution cavity and the air inlet cavity and the medium collector, and the medium well through the small port and the medium collector medium well and is discharged into the medium collector medium well, and flow space and the medium well and flow space and well. The split type structure can be adopted between the distribution cover 16 and the end cover plate 7, the distribution cover 16 and the end cover plate 7 are assembled into a whole through welding and fixing, the distribution cover 16 and the end cover plate 7 can also be integrally cast, the fixing mode is not limited, and the selection and the adjustment can be carried out according to actual demands.

As shown in fig. 9 and 10, in the second embodiment of the present utility model, the positional relationship between the dispenser unit and the dispensing cover 16 is adjusted based on the first embodiment. The refrigerant inlet channel 10 and the refrigerant outlet channel 11 are both distribution covers 16, one end of the distribution covers 16 is provided with an interface 17, the other end of the distribution covers 16 is provided with a plug section 20, both the liquid inlet cavity 25 and the air collecting cavity 26 are internally provided with clamping grooves 21, the plug section 20 is arranged in the corresponding clamping grooves 21 in a matching way, a gap buffer cavity is formed between the distribution covers 16 arranged on the liquid inlet cavity 25 and the liquid distribution assembly, the interface 17, the distribution covers 16 and the plug section 20 are of an integrated structure, the integral structural strength of the distribution covers 16 is ensured, the distribution covers 16 are of horn-shaped structures with large ends and small ends, the interface 17 is arranged at the necking of the distribution covers 16, the plug section 20 is arranged at the flaring of the distribution covers 16, the plug section 20 is matched with the clamping grooves 21 to realize the positioning between the distribution covers 16, the liquid inlet cavity 25 and the air collecting cavity 26, the design is ingenious, the actual assembly positioning is more convenient, and the refrigerant medium enters the corresponding distribution covers 16, the refrigerant medium flowing from the small port to the large port of the distribution cover 16 flows into the liquid inlet cavity 25 after being primarily buffered and guided by the distribution cover 16, a gap buffer cavity 27 is reserved between the distribution cover 16 and the liquid distribution assembly arranged on the liquid inlet cavity 25, so that the refrigerant medium flowing out of the distribution cover 16 after being buffered and guided by the gap buffer cavity 27 is contacted with the liquid distribution assembly, the refrigerant medium is split by the liquid distribution assembly and uniformly enters the heat exchanger, the impact force of the refrigerant medium on the liquid distribution assembly can be reduced through the buffering action of the gap buffer cavity 27, when the refrigerant medium flows out of the heat exchange tube bundle group 4, the refrigerant medium firstly enters the air collecting cavity 26, enters the corresponding distribution cover 16 through the air collecting cavity 26, flows from the large port to the small port of the distribution cover 16, and is concentrated and converged into the distribution cover 16 through the convergence and concentration action of the distribution cover 16, and then is discharged through the interface 17 on the distribution cover 16 in a concentrated way, so that the design is reasonable and the discharge of the refrigerant medium is facilitated. The split type structure can be adopted between the distribution cover 16 and the end cover plate 7, the distribution cover 16 and the end cover plate 7 are assembled into a whole through welding and fixing, the distribution cover 16 and the end cover plate 7 can also be integrally cast, the fixing mode is not limited, and the selection and the adjustment can be carried out according to actual demands.

As shown in fig. 11 to 13, in the third embodiment of the present utility model, the structures of the refrigerant inlet channel 10 and the refrigerant outlet channel 11 are adjusted based on the first embodiment. The refrigerant inlet channel 10 and the refrigerant outlet channel 11 are both the pipe joint 28, the pipe joint 28 and the end cover plate 7 are of an integrated structure, the refrigerant inlet channel 10 and the refrigerant outlet channel 11 are of the pipe joint 28, the design is simple and reasonable, the pipe joint 28 and the end cover body are of an integrated structure, the integral structural strength is effectively ensured, the end cover plate 7 can resist the impact of a medium, and meanwhile, the practical processing and forming are convenient.

The above is only a specific embodiment of the present utility model, but the technical features of the present utility model are not limited thereto. Any simple changes, equivalent substitutions or modifications made on the basis of the present utility model to achieve substantially the same technical effects are included in the scope of the present utility model.

Claims (10)

1. The utility model provides a double loop structure shell and tube heat exchanger, includes the casing and sets up inlet tube and outlet pipe on the casing, its characterized in that: two groups of heat exchange tube bundle groups are arranged in the shell, two groups of refrigerant channel groups are arranged at one end of the shell, and the two groups of refrigerant channel groups are communicated with the two groups of heat exchange tube bundle groups in a one-to-one correspondence manner to form two refrigerant loops.

2. A double loop structured shell and tube heat exchanger as set forth in claim 1 wherein: the bottom of casing is provided with the support bracket, be provided with the fixed slot hole on the support bracket, the inlet tube with the port department of outlet pipe all is provided with flange.

3. A double loop structured shell and tube heat exchanger as set forth in claim 1 wherein: the heat exchange tube bundle group is arranged in the shell, the heat exchange tube bundle group is arranged on the baffle in a penetrating mode, the baffle comprises a first baffle and a second baffle, the first baffle and the second baffle are distributed inside the shell in a staggered mode at intervals, the top end of the first baffle and the bottom end of the second baffle are fixedly connected with the inner wall of the shell, gaps are formed in the bottom end of the first baffle and the top end of the second baffle, and a flow channel is formed between the gaps and the inner wall of the shell.

4. A double loop structured shell and tube heat exchanger as set forth in claim 1 wherein: the heat exchange tube comprises a shell, and is characterized in that an end cover plate and a tube plate are arranged at one end of the shell, the refrigerant channel group is arranged on the end cover plate, the end cover plate is fixedly connected with the tube plate through a bolt assembly, a sealing gasket is arranged between the end cover plate and the tube plate, the tube plate is fixedly connected with the shell, and one end of the heat exchange tube bundle group is fixedly arranged on the tube plate.

5. A double loop structured shell and tube heat exchanger as set forth in claim 4 wherein: the refrigerant channel group comprises a refrigerant inlet channel and a refrigerant outlet channel which are communicated with the heat exchange tube bundle group.

6. A double loop structured shell and tube heat exchanger as set forth in claim 5 wherein: the end cover plate is provided with a liquid inlet cavity opposite to the refrigerant inlet channel, the refrigerant inlet channel is communicated with the liquid inlet cavity, the end cover plate is provided with an air collecting cavity opposite to the refrigerant outlet channel, the air collecting cavity is communicated with the refrigerant outlet channel, and a liquid separating component is arranged in the liquid inlet cavity.

7. A double loop structured shell and tube heat exchanger as set forth in claim 6 wherein: the liquid separation assembly comprises a first liquid separation plate and a second liquid separation plate, wherein a first liquid separation hole is formed in the first liquid separation plate, a second liquid separation hole is formed in the second liquid separation plate, and the aperture of the first liquid separation hole is larger than that of the second liquid separation hole.

8. A double loop structured shell and tube heat exchanger as set forth in claim 6 wherein: the refrigerant inlet channel and the refrigerant outlet channel are both distribution covers, one end of each distribution cover is provided with an interface, the other end of each distribution cover is provided with an inserting section, clamping grooves are formed in the liquid inlet cavity and the gas collecting cavity, the inserting sections are arranged in the corresponding clamping grooves in a matching mode, and the distribution covers mounted on the liquid inlet cavity are in conflict with the liquid distribution assembly.

9. A double loop structured shell and tube heat exchanger as set forth in claim 6 wherein: the refrigerant inlet channel and the refrigerant outlet channel are both distribution covers, one end of each distribution cover is provided with an interface, the other end of each distribution cover is provided with an inserting section, the liquid inlet cavity and the gas collecting cavity are internally provided with clamping grooves, the inserting sections are arranged in the corresponding clamping grooves in a matching mode, and an interval is formed between the distribution cover and the liquid distribution assembly and is arranged on the liquid inlet cavity, so that a gap buffer cavity is formed.

10. A double loop structured shell and tube heat exchanger as set forth in claim 6 wherein: the refrigerant inlet channel and the refrigerant outlet channel are pipe joints, and the pipe joints and the end cover plate are of an integrated structure.