Heat exchanger and refrigerating system thereof
By introducing a return pipe and a secondary heat exchange unit into the heat exchanger, the problem of poor heat exchange effect of the existing heat exchanger is solved, efficient medium condensation and temperature reduction are achieved, and the heat exchange efficiency of the heat exchanger is improved.
Patent Information
- Application Number
- CN202421926756.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-09
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-08-09
AI Technical Summary
The existing heat exchanger uses a single heat exchange unit to exchange heat, resulting in poor heat exchange effect, the temperature of the medium is not low enough after heat exchange, and there is a gas-liquid mixed state.
A heat exchanger including the first and second heat exchange units is designed, and a high-temperature gaseous medium is flowed from the first heat exchange tube to the return tube through the return tube, and a secondary heat exchange is performed through the second heat exchange tube to ensure that the medium is completely condensed and the temperature is reduced.
The secondary heat exchange ensures that the gaseous medium is completely condensed, and further reduces the medium temperature, improves the heat exchange efficiency of the heat exchanger, making it more energy-saving and efficient.
Smart Images
Figure CN222912448U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of refrigeration systems, in particular to a heat exchanger and a refrigeration system thereof. Background Art
[0002] Existing heat exchangers usually include a heat exchange component, and the heat exchange component includes a plurality of heat exchange tubes. The plurality of heat exchange tubes are interconnected to form a heat exchange unit. When a medium flows through the plurality of heat exchange tubes, heat dissipation occurs to condense, and then it becomes a liquid medium. However, the existing heat exchanger performs heat exchange through a single heat exchange unit, and its heat exchange effect is not good. The temperature of the medium is not low enough after heat exchange, and there is a gas-liquid mixed state. Summary of the Utility Model
[0003] Based on this, in view of the above technical problems, the utility model provides a heat exchanger.
[0004] A heat exchanger, the heat exchanger includes: a heat exchange component, the heat exchange component includes a first heat exchange unit and a second heat exchange unit, and the first heat exchange unit and the second heat exchange unit are interconnected; a return pipe, the return pipe extends along the first preset direction, and the first heat exchange unit is connected to the second heat exchange unit through the return pipe; wherein, the first heat exchange unit includes a plurality of first heat exchange tubes connected to the return pipe, the second heat exchange unit includes a plurality of second heat exchange tubes connected to the return pipe, the connection area between the return pipe and the first heat exchange tubes is S1, and the flow area between the return pipe and the second heat exchange tubes is S2, satisfying:
[0005] With such a setting, when the high-temperature gaseous medium flows through the first heat exchange tubes to the return pipe, it will pass through the heat exchange component, perform heat exchange and condensation, and change from a gaseous state to a liquid state. Then the medium performs secondary heat exchange through the second heat exchange tubes, so as to ensure that the gaseous medium is all converted into a liquid medium, and further reduce the temperature of the medium, improve the heat exchange efficiency of the heat exchanger, and make it more energy-saving and efficient. And in this application, the flow areas of the second heat exchange tubes and the return pipe are reasonably set, which not only prevents the flow area S2 of the return pipe and the second heat exchange tubes from being too small, resulting in incomplete secondary heat exchange of the medium with the heat exchange component, but also avoids the flow area S2 being too large, so that too many media pass through the heat exchange component for heat exchange at the same time, and the heat dissipation effect is not obvious after the overall temperature of the heat exchange component rises.
[0006] In one of the embodiments, the return pipe includes a condensation section and a subcooling section, the first heat exchange tubes are connected to the condensation section, the second heat exchange tubes are connected to the subcooling section, and the subcooling section is located below the condensation section.
[0007] In one embodiment, multiple first heat exchange tubes and multiple second heat exchange tubes are both arranged in parallel and evenly spaced. Along the length direction of the return pipe, the subcooling section accounts for 10%-15% of the length of the return pipe.
[0008] In one embodiment, one end of the intake pipe is connected to a first connecting pipe. The end of the first connecting pipe facing away from the intake pipe is connected to an inlet pipe, and the inlet pipe is coaxially arranged with the first connecting pipe; one end of the liquid outlet pipe is connected to a second connecting pipe. The end of the second connecting pipe facing away from the liquid outlet pipe is connected to an outlet pipe, and the outlet pipe is coaxially arranged with the second connecting pipe.
[0009] In one embodiment, joints are connected to the end of the intake pipe away from the first heat exchange unit and the end of the liquid outlet pipe away from the second heat exchange unit, and at least part of the joint is a reduced-diameter structure.
[0010] In one embodiment, the heat exchange assembly has a first side and a second side oppositely arranged along the length direction of the first heat exchange tube. The liquid outlet pipe and the intake pipe are both arranged on the first side, the return pipe is arranged on the second side, the liquid outlet pipe is arranged at the bottom of the first side, and the liquid outlet pipe is communicated with the bottom of the return pipe through the second heat exchange tube.
[0011] In one embodiment, multiple second heat exchange tubes are arranged obliquely downward along the direction from the return pipe to the liquid outlet pipe.
[0012] In one embodiment, the diameter of the first heat exchange tube is R1, and R1 satisfies 5mm ≤ R1 ≤ 15.88mm; and / or, the diameter of the second heat exchange tube is R2, and R2 satisfies 5mm ≤ R2 ≤ 15.88mm;
[0013] Multiple first heat exchange tubes are evenly spaced, and the spacing distance is H1, and H1 satisfies: 12.7mm ≤ H1 ≤ 45mm; and / or, multiple second heat exchange tubes are evenly spaced, and the spacing distance is H2, and H2 satisfies: 12.7mm ≤ H2 ≤ 45mm.
[0014] In one embodiment, the heat exchange assembly includes multiple fins, and the multiple fins are evenly spaced. The first heat exchange tube and the second heat exchange tube both pass through the multiple fins.
[0015] The present invention also provides a refrigeration system including the heat exchanger as described above.
[0016] Compared with the prior art, the utility model sets up a reflux pipe, and the intake pipe and the reflux pipe are respectively arranged on both sides of the heat exchange component, so that when the high-temperature gaseous medium flows from the intake pipe through the first heat exchange pipe to the reflux pipe, it will pass through the heat exchange component for heat exchange and condensation, changing from gaseous state to liquid state. And the liquid outlet pipe is also located on the side of the heat exchange component away from the reflux pipe. Therefore, when the medium in the reflux pipe flows through the second heat exchange pipe to the liquid outlet pipe, it needs to conduct secondary heat exchange with the heat exchange component, so as to ensure that the gaseous medium is completely converted into liquid medium, and further reduce the temperature of the medium, improve the heat exchange efficiency of the heat exchanger, and make it more energy-saving and efficient. And the application reasonably sets the flow areas of the second heat exchange pipe and the reflux pipe, which not only prevents the ratio of the flow area S2 of the reflux pipe and the second heat exchange pipe from being too small, resulting in incomplete secondary heat exchange of the medium with the heat exchange component, but also avoids the flow area S2 from being too large, so that too many media pass through the heat exchange component for heat exchange at the same time, and the heat dissipation effect is not obvious after the overall temperature of the heat exchange component rises. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 FIG. is a schematic structural diagram of one embodiment of the heat exchanger provided by the utility model;
[0018] Figure 2 is Figure 1 a partial enlarged view of part A in;
[0019] Figure 3 FIG. is a schematic structural diagram of another angle of one embodiment of the heat exchanger provided by the utility model;
[0020] Figure 4 is Figure 3 a partial enlarged view of part B in;
[0021] Figure 5 FIG. is a schematic structural diagram of another angle of one embodiment of the heat exchanger provided by the utility model;
[0022] Figure 6 is Figure 5 a partial enlarged view of part C in;
[0023] Figure 7 FIG. is a partial cross-sectional view of one embodiment of the heat exchanger provided by the utility model.
[0024] The meanings of the symbols in the figures are as follows:
[0025] 100, heat exchanger; 10, heat exchange component; 101, first heat exchange unit; 102, second heat exchange unit; 20, intake pipe; 21, first connecting pipe; 22, inlet pipe; 30, reflux pipe; 31, condensation section; 32, subcooling section; 40, liquid outlet pipe; 41, second connecting pipe; 42, outlet pipe; 50, first heat exchange pipe; 60, second heat exchange pipe; 70, joint. Detailed implementation manners
[0026] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.
[0027] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of the present application are only for the purpose of illustration and do not represent the only implementation manner.
[0028] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.
[0029] In the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature can be that the first feature is in direct contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.
[0030] Unless otherwise defined, all technical and scientific terms used in the specification of the present application have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific implementation manners and are not intended to limit the present application. The term "and / or" used in the specification of the present application includes any and all combinations of one or more of the related listed items.
[0031] The present utility model provides a heat exchanger 100, which is applied to a refrigeration system and can condense high-temperature steam more thoroughly, reducing the generation of unsaturated liquid.
[0032] Please refer to Figures 1 - 6 , the heat exchanger 100 includes a heat exchange component 10 and a return pipe 30. The heat exchange component 10 includes a first heat exchange unit 101 and a second heat exchange unit 102. The first heat exchange unit 101 and the second heat exchange unit 102 are in mutual communication. The return pipe 30 extends along a first preset direction, and the first heat exchange unit 101 is communicated with the second heat exchange unit 102 through the return pipe 30. Among them, the first heat exchange unit 101 includes a plurality of first heat exchange pipes 50 communicated with the return pipe 30, and the second heat exchange unit 102 includes a plurality of second heat exchange pipes 60 communicated with the return pipe 30. The communication area between the return pipe 30 and the first heat exchange pipes 50 is S1, and the flow area between the return pipe 30 and the second heat exchange pipes 60 is S2, satisfying:
[0033] In this way, during the process of the high-temperature gaseous medium flowing from the first heat exchange pipes 50 to the return pipe 30, heat exchange and condensation occur, changing from gaseous state to liquid state. During the process of the medium in the return pipe 30 passing through the second heat exchange pipes 60, the heat exchange component 10 performs secondary heat exchange, thereby ensuring that the gaseous medium is completely converted into liquid medium, and further reducing the temperature of the medium, improving the heat exchange efficiency of the heat exchanger 100, and making it more energy-saving and efficient. And in this application, the flow area between the second heat exchange pipes 60 and the return pipe 30 is reasonably set, which not only prevents the proportion of the flow area S2 between the return pipe 30 and the second heat exchange pipes 60 from being too small, resulting in incomplete secondary heat exchange of the medium with the heat exchange component 10, but also avoids the flow area S2 being too large, causing too much medium to pass through the heat exchange component 10 for heat exchange at the same time. After the overall temperature of the heat exchange component 10 rises, the heat dissipation effect is not obvious.
[0034] It should be explained that, please refer to Figure 1 , the first preset direction refers to the vertical direction when the heat exchanger 100 is vertically installed in the Figure 1 state.
[0035] Exemplarily, the flow area S2 between the return pipe 30 and the second heat exchange pipes 60 accounting for 10%, 11%, 12%, 13%, 14% or 15% etc. of the total flow area of the medium in the return pipe 30 can all achieve the effect of secondary temperature reduction.
[0036] Further, the heat exchanger 100 further includes an intake pipe 20 communicating with the first heat exchange pipe 50 and a liquid outlet pipe 40 communicating with the second heat exchange pipe 60. The intake pipe 20 and the liquid outlet pipe 40 both extend along a first preset direction, and the intake pipe 20, the reflux pipe 30, and the liquid outlet pipe 40 are all arranged in parallel. Thus, since the intake pipe 20, the reflux pipe 30, and the liquid outlet pipe 40 are all vertically arranged, when the medium condenses into a liquid state, the liquid medium will naturally deposit due to gravity and concentrate at the bottoms of the reflux pipe 30 and the liquid outlet pipe 40, the flow direction of the medium is more determined, and it is also convenient for guiding.
[0037] Furthermore, the heat exchange assembly 10 has a first side and a second side oppositely arranged along the length direction of the first heat exchange pipe 50. The liquid outlet pipe 40 and the intake pipe 20 are both arranged on the first side, and the reflux pipe is arranged on the second side. That is to say, when the high-temperature medium flows from the first side to the second side, it necessarily needs to pass through the intake pipe 20, the reflux pipe 30, and the liquid outlet pipe 40, thereby ensuring thorough heat exchange.
[0038] The liquid outlet pipe 40 is arranged at the bottom of the first side, and the liquid outlet pipe 40 is communicated with the bottom of the reflux pipe 30 through the second heat exchange pipe 60. Thus, the condensed water can deposit at the lower part of the heat exchange assembly 10 due to gravity and flow out through the liquid outlet pipe 40.
[0039] Furthermore, the reflux pipe 30 includes a condensation section 31 and a subcooling section 32. The first heat exchange pipe 50 is communicated with the condensation section 31, the second heat exchange pipe 60 is communicated with the subcooling section 32, and the subcooling section 32 is located below the condensation section 31. Thus, after the medium condenses into a liquid state, it will all flow downward and concentrate in the subcooling section 32, and flow from the subcooling section 32 to the liquid outlet pipe 40 through the second heat exchange pipe 60.
[0040] Of course, in other embodiments, when the heat exchanger 100 is placed horizontally, there is no limitation on the vertical arrangement of the condensation section 31 and the subcooling section 32. When the heat exchanger 100 is inverted, it is necessary to adjust so that the condensation section 31 is communicated with the second heat exchange pipe 60.
[0041] In this embodiment, multiple first heat exchange pipes 50 and multiple second heat exchange pipes 60 are all arranged in parallel and evenly spaced. Along the length direction of the reflux pipe 30, the subcooling section 32 accounts for 10%-15% of the length of the reflux pipe 30. Thus, since the first heat exchange pipes 50 and the second heat exchange pipes 60 are evenly spaced, the proportion length of the subcooling section 32 is the proportion of the communication area between the reflux pipe 30 and the second heat exchange pipe 60, which is more convenient for processing and setting, and is also simpler for controlling the flow area.
[0042] Of course, in the embodiment where the first heat exchange tubes 50 and the second heat exchange tubes 60 are unevenly arranged, the length ratios of the subcooling section 32 and the condensation section 31 can also be adjusted adaptively. When the second heat exchange tubes 60 in the subcooling section 32 are arranged more densely, it can account for a value less than 10% of the length of the return pipe 30, and vice versa, it can exceed 15%.
[0043] Meanwhile, the liquid outlet pipe 40 is arranged at the bottom of the side of the heat exchange assembly 10 where the air inlet pipe 20 is located. Since the liquid medium is mainly concentrated at the bottom of the return pipe 30, the liquid outlet pipe 40 is also correspondingly arranged at the bottom, which can facilitate the flow of liquid from the return pipe 30 to the liquid outlet pipe 40.
[0044] The air inlet pipe 20 and the return pipe 30 are arranged at intervals with respect to the heat exchange assembly 10. That is to say, the air inlet pipe 20 is spaced a certain distance from the side of the heat exchange assembly 10 close to it, and the return pipe 30 is also spaced a certain distance from the side of the heat exchange assembly 10 close to it. Therefore, the air inlet pipe 20 and the return pipe 30 are conveniently arranged, reducing interference with the heat exchange assembly 10, making the processing of the first heat exchange tubes 50 and the second heat exchange tubes 60 more convenient, and also avoiding the influence of the temperature on the surface of the heat exchange assembly 10 on the medium state in the air inlet pipe 20 and the return pipe 30.
[0045] Of course, in other embodiments, the air inlet pipe 20 and the return pipe 30 can also be attached to the heat exchange assembly 10 to shorten the occupied space.
[0046] Furthermore, along the direction from the return pipe 30 to the liquid outlet pipe 40, multiple second heat exchange tubes 60 located between the return pipe 30 and the heat exchange assembly 10 are inclined downward. In this way, the liquid can flow through the downwardly inclined second heat exchange tubes 60, making it more convenient for the liquid medium to flow from the return pipe 30 to the liquid outlet pipe 40.
[0047] Please refer to Figure 7 , in this embodiment, the diameter of the first heat exchange tube 50 is R1, and R1 satisfies 5 mm ≤ R1 ≤ 15.88 mm; and / or, the diameters of the second heat exchange tubes 60 are all R2, and R2 satisfies 5 mm ≤ R2 ≤ 15.88 mm. Multiple first heat exchange tubes 50 are evenly spaced, and the spacing distance is H1, and H1 satisfies: 12.7 mm ≤ H1 ≤ 45 mm; and / or, multiple second heat exchange tubes 60 are evenly spaced, and the spacing distance is H2, and H2 satisfies: 12.7 mm ≤ H2 ≤ 45 mm.
[0048] In this way, the diameters of the first heat exchange tube 50 and the second heat exchange tube 60 are reasonably specified, and the same diameters of the two tubes facilitate processing, reduce processing costs, and can prevent the diameter from being too small to affect the flow rate of the medium, and also prevent the diameter from being too large to cause the flow rate of the medium to be too large, resulting in insufficient heat exchange efficiency of the heat exchange assembly 10. At the same time, the spacing distances between the multiple first heat exchange tubes 50 and the multiple second heat exchange tubes 60 are specified, which can prevent the distances from being too close to affect the heat exchange effect, and also avoid the distance from being too far to cause space waste. The specific heat capacity of the heat exchange medium in the first heat exchange tube 50 and the second heat exchange tube 60 is different, and it is necessary to reasonably adjust the diameters of the first heat exchange tube 50 and the second heat exchange tube 60, which is beneficial to the heat exchange of the heat exchanger 100.
[0049] Exemplarily, R1 and R2 are 7 mm, 9 mm, 11 mm or 14 mm, etc., and H1 and H2 are set to 13 mm, 25 mm, 33 mm, etc., as long as the above-mentioned restrictions are met. Based on the above-mentioned tube diameters, the hole spacing between adjacent first heat exchange tubes 50 and second heat exchange tubes 60 is between 19.05-52 mm.
[0050] The heat exchange assembly 10 includes a plurality of fins (not shown in the figure), the plurality of fins are evenly spaced, and the first heat exchange tube 50 and the second heat exchange tube 60 are both inserted into the plurality of fins. The fins can distribute the heat on the first heat exchange tube 50 and the second heat exchange tube 60, increase the contact area with the air, and thus improve the heat exchange efficiency.
[0051] It should be explained that, in this embodiment, the first heat exchange tube 50 may be a single straight tube structure with two ends connected to the intake tube 20 and the return tube 30 respectively, or may be a structure that is connected to the intake tube 20 at one end after multiple bends, and the other end is bent multiple times to form a structure that is parallel to each other in multiple sections, that is, an S-shaped structure, and finally still extends toward the return tube 30 and is connected to the return tube 30. Alternatively, the first heat exchange tube and the second heat exchange tube may both include a straight tube and a bent tube, and the bent tubes are connected to a plurality of straight tubes, and the first heat exchange tube 50 and the second heat exchange tube 60 are both inserted into the fins through each section of the straight tube to improve the heat conduction effect.
[0052] The air inlet pipe 20 and the liquid outlet pipe 40 are both connected to a joint 70 at one end away from the second heat exchange unit 102. At least a portion of the joint 70 is a contraction structure, which can facilitate the connection between the joint and the external pipeline. The air inlet pipe 20 is connected to the joint 70, and the liquid outlet pipe 40 is also connected to the joint 70, thereby facilitating the connection between the air inlet pipe 20 and the liquid outlet pipe 40 and the external pipeline.
[0053] Specifically, the joint 70 can be divided into multiple parts. In this embodiment, one end of the intake pipe 20 is connected to a first connecting pipe 21. The end of the first connecting pipe 21 facing away from the intake pipe 20 is connected to an inlet pipe 22, and the inlet pipe 22 is coaxially arranged with the first connecting pipe 21. One end of the liquid outlet pipe 40 is connected to a second connecting pipe 41. The end of the second connecting pipe 41 facing away from the liquid outlet pipe 40 is connected to an outlet pipe 42, and the outlet pipe 42 is coaxially arranged with the second connecting pipe 41.
[0054] Preferably, the first connecting pipe 21 is arranged at an angle with the intake pipe 20, and the second connecting pipe 41 is arranged at an angle with the liquid outlet pipe 40, so as to facilitate the connection between the heat exchanger and the external pipeline.
[0055] The present utility model also provides a refrigeration system, including the heat exchanger 100 as described above.
[0056] Compared with the prior art, by setting the return pipe 30, and arranging the intake pipe 20 and the return pipe 30 on both sides of the heat exchange assembly 10 respectively, when the high-temperature gaseous medium flows from the intake pipe 20 through the first heat exchange pipe 50 to the return pipe 30, it will pass through the heat exchange assembly 10 for heat exchange and condensation, changing from gaseous state to liquid state. And the liquid outlet pipe 40 is also located on the side of the heat exchange assembly 10 away from the return pipe 30. Therefore, when the medium in the return pipe 30 flows through the second heat exchange pipe 60 to the liquid outlet pipe 40, it needs to conduct secondary heat exchange with the heat exchange assembly 10, so as to ensure that the gaseous medium is completely converted into liquid medium, and further reduce the temperature of the medium, improve the heat exchange efficiency of the heat exchanger 100, and make it more energy-saving and efficient. And the present application reasonably sets the flow areas of the second heat exchange pipe 60 and the return pipe 30, which not only prevents the proportion of the flow area S2 of the return pipe 30 and the second heat exchange pipe 60 from being too small, resulting in incomplete secondary heat exchange of the medium with the heat exchange assembly 10, but also avoids the flow area S2 being too large, so that too much medium passes through the heat exchange assembly 10 for heat exchange at the same time, and the heat dissipation effect is not obvious after the overall temperature of the heat exchange assembly 10 rises.
[0057] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.
[0058] The above-described embodiments only represent several implementation manners of the present utility model. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.
Claims
1. A heat exchanger, characterized in that: The heat exchanger comprises: A heat exchange component (10), the heat exchange component (10) comprising a first heat exchange unit (101) and a second heat exchange unit (102), the first heat exchange unit (101) and the second heat exchange unit (102) being interconnected; a return pipe (30), the return pipe (30) extending along a first preset direction, and the first heat exchange unit (101) being connected to the second heat exchange unit (102) via the return pipe (30); The first heat exchange unit (101) includes a plurality of first heat exchange tubes (50) connected to the return tube (30), the second heat exchange unit (102) includes a plurality of second heat exchange tubes (60) connected to the return tube (30), the connection area between the return tube (30) and the first heat exchange tube (50) is S1, and the flow area between the return tube (30) and the second heat exchange tube (60) is S2, satisfying:
2. The heat exchanger according to claim 1, characterized in that: The reflux pipe (30) comprises a condensation section (31) and a supercooling section (32); the first heat exchange pipe (50) is connected to the condensation section (31); the second heat exchange pipe (60) is connected to the supercooling section (32); and the supercooling section (32) is located at the lower part of the condensation section (31).
3. The heat exchanger according to claim 2, characterized in that: The plurality of first heat exchange tubes (50) and the plurality of second heat exchange tubes (60) are arranged in parallel and evenly spaced apart, and along the length direction of the return tube (30), the supercooling section (32) occupies 10%-15% of the length of the return tube (30).
4. The heat exchanger according to claim 1, characterized in that: The heat exchanger further comprises an air inlet pipe (20) connected to the first heat exchange pipe (50) and a liquid outlet pipe (40) connected to the second heat exchange pipe (60); the air inlet pipe (20) and the liquid outlet pipe (40) are both extended along the first preset direction; the air inlet pipe (20), the reflux pipe (30) and the liquid outlet pipe (40) are arranged in parallel.
5. The heat exchanger according to claim 4, characterized in that: One end of the air intake pipe (20) is connected to a first connecting pipe (21), and one end of the first connecting pipe (21) facing away from the air intake pipe (20) is connected to an inlet pipe (22), and the inlet pipe (22) is coaxially arranged with the first connecting pipe (21); One end of the liquid outlet pipe (40) is connected to a second connecting pipe (41), and one end of the second connecting pipe (41) facing away from the liquid outlet pipe (40) is connected to an outlet pipe (42), and the outlet pipe (42) is coaxially arranged with the second connecting pipe (41).
6. The heat exchanger according to claim 4, characterized in that The heat exchange assembly (10) has a first side and a second side which are arranged opposite to each other along the length direction of the first heat exchange tube (50); the liquid outlet pipe (40) and the air inlet pipe (20) are both arranged on the first side; the return pipe (30) is arranged on the second side; the liquid outlet pipe (40) is arranged at the bottom of the first side; and the liquid outlet pipe (40) is connected to the bottom of the return pipe (30) through the second heat exchange tube (60).
7. The heat exchanger according to claim 6, characterized in that Along the direction from the reflux pipe (30) to the liquid outlet pipe (40), a plurality of the second heat exchange pipes (60) are arranged to be inclined downward.
8. The heat exchanger according to claim 1, characterized in that The diameter of the first heat exchange tube (50) is R1, and R1 satisfies 5 mm ≤ R1 ≤ 15.88 mm; and / or the diameter of the second heat exchange tube (60) is R2, and R2 satisfies 5 mm ≤ R2 ≤ 15.88 mm; The plurality of first heat exchange tubes (50) are evenly spaced and spaced at a distance H1, where H1 satisfies: 12.7 mm ≤ H1 ≤ 45 mm; and / or the plurality of second heat exchange tubes (60) are evenly spaced and spaced at a distance H2, where H2 satisfies: 12.7 mm ≤ H2 ≤ 45 mm.
9. The heat exchanger according to claim 1, characterized in that: The heat exchange component (10) comprises a plurality of fins, the plurality of fins are evenly spaced, and the first heat exchange tube (50) and the second heat exchange tube (60) are both passed through the plurality of fins.
10. A refrigeration system, characterized in that: Comprising the heat exchanger according to any one of claims 1 to 9.