Heat exchanger

Abstract

The utility model relates to the technical field of refrigerating systems, in particular to a heat exchanger. The heat exchanger comprises a plurality of flat pipes and a plurality of fins, the flat pipes are arranged at intervals, the fins are arranged between the adjacent flat pipes, and the two sides of the fins in the thickness direction are connected with the flat pipes. The flat pipe is at least provided with a first channel, a second channel and a communicating channel communicating the first channel with the second channel, and a limiting part is arranged on the side, close to the communicating channel, of the flat pipe and extends in the thickness direction of the flat pipe. The heat exchanger has the advantages that the fins are limited to the sides, facing the inlet, of the flanged plates by means of the abutting effect of the flanged plates arranged on the communicating parts and the fins, so that the structure of the heat exchanger is more durable and stable.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration systems, in particular to a heat exchanger. Background Art

[0002] Heat exchangers are widely used in refrigeration systems and usually include flat tubes and fins. The flat tubes are used for the flow of refrigerant. The flat tubes are connected to the fins and exchange heat with the fins. The fins increase the contact area between the flat tubes and the air, thereby improving the efficiency of heat exchange between the flat tubes and the external environment.

[0003] There are multiple flow channels constructed in the flat tube. In order to extend the flow path of the heat exchange medium in the flat tube and thus improve the heat exchange efficiency, the multiple flow channels are located at one end of the same side as the inlet and outlet of the flat tube, and the other end is connected through a connecting channel. The fins are arranged at intervals from one end to the other end along the length direction of the flat tube, and the fins on the side close to the connecting channel are prone to problems of wing bounce and wing inversion. Utility Model Content

[0004] Based on this, the utility model provides a heat exchanger for the above technical problems.

[0005] A heat exchanger comprises a plurality of flat tubes and a plurality of fins, wherein the plurality of flat tubes are arranged at intervals along the thickness direction thereof, and the fins are arranged between adjacent flat tubes;

[0006] The flat tube is at least configured with a first channel, a second channel and a connecting channel connecting the first channel and the second channel, and the flat tube has a limiting portion on one side close to the connecting channel, and the limiting portion is extended along the thickness direction of the flat tube.

[0007] With such a configuration, the fins are located between the flat tubes, and the heat on each flat tube can be transferred to the fins on both sides along its thickness direction. The fins increase the contact area between the flat tubes and the air, thereby improving the heat exchange efficiency. In addition, the flat tubes are constructed with a first channel and a second channel that are connected, so that in the process of the heat exchange medium flowing from the first channel to the second channel, it will pass through the first channel and flow to the second channel through the connecting channel, and heat exchange is performed twice in the process of flowing in the two channels, so that the heat exchange of the heat exchange medium is more thorough. Since the connecting channel is far away from the inlet and the outlet, there is no manifold on this side of the connecting channel. Since the fins on this side have no limiting structure, they are prone to deformation and wing-bounce problems. Therefore, the flange plate set on the connecting channel relies on its abutment effect with the fins to limit the fins to the side of the flange plate facing the inlet, so that the structure of the heat exchanger is more durable and stable.

[0008] In one embodiment, the limiting portion is a flange plate connected to the flat tube, and the flange plate is extended along the thickness direction of the flat tube.

[0009] In one embodiment, there are multiple flange plates, and the multiple flange plates are arranged at intervals along the width direction of the flat tube.

[0010] In one embodiment, the flange plate extends along the thickness direction of the flat tube to at least one adjacent flat tube.

[0011] In one embodiment, the length of the fin is L, the width of the fin is H, drain outlets are provided on both sides of the fin in the width direction, and the drain outlets are located between two adjacent flange plates. The center line of the drain outlet divides the fin into an asymmetric first section and a second section, the length of the first section is smaller than the length of the second section, and the width of the drain outlet is a along the length direction of the fin.

[0012] In one embodiment, the flange plate is rectangular, and the length of the flange plate projected on the first segment is n, and the length of the first segment is b, satisfying: b / 4≤n≤b-2 / a.

[0013] In one embodiment, the length of the flange plate projected onto the second section is m, satisfying m=n.

[0014] In one embodiment, the flange plate is triangular, and the length of the bottom side of the flange plate is n; and / or the flange plate is elliptical, and the major axis of the ellipse is n.

[0015] In one embodiment, the flange plate is rectangular, and the length of the flange plate projected on the second section is m, the length of the fin is L, satisfying (Lb) / 4≤m≤Lba / 2, and the width of the flange plate is d, satisfying: H / 4≤d≤H.

[0016] In one embodiment, the first channel and the second channel each have a plurality of protrusions, the protrusions are connected to the flat tube, and the protrusions are provided with through holes along the length direction of the first channel and / or the second channel.

[0017] Compared with the prior art, the utility model sets a flange plate at one end of the flat tube, and avoids deformation and wing bounce problems of the fins through the flange plate's abutment and limiting effect on the fins. The relationship between the size of the flange plate and the size of the fins is reasonably set, so that the flange plate can achieve stable limiting abutment on the fins without hindering the discharge of condensed water on the fins, and also takes into account the problems of consumables and costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1A dimensioned diagram of the fins and flanged plates of one embodiment of the heat exchanger provided by the utility model;

[0019] Figure 2 A schematic structural diagram of a rectangular flanged plate of one embodiment of a heat exchanger provided by the utility model;

[0020] Figure 3 A schematic structural diagram of an elliptical flanged plate of one embodiment of a heat exchanger provided by the utility model;

[0021] Figure 4 A schematic structural diagram of a triangular flanged plate of one embodiment of a heat exchanger provided by the utility model;

[0022] Figure 5 A schematic structural diagram of one embodiment of a heat exchanger provided by the utility model;

[0023] Figure 6 A schematic diagram of the internal structure of one embodiment of the flat tube provided by the utility model;

[0024] Figure 7 A schematic structural diagram of a heat exchanger provided by the utility model, in which a collecting pipe is installed.

[0025] The symbols in the figure mean the following:

[0026] 100, heat exchanger; 10, flat tube; 11, first channel; 111, protrusion; 12, second channel; 13, connecting channel; 20, fin; 21, first section; 22, second section; 23, drain outlet; 30, flange plate; 40, collecting pipe. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full 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 violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0028] It should be noted that when a mechanism is referred to as being "fixed to" or "set on" another mechanism, it may be directly on the other mechanism or there may be a central mechanism. When a mechanism is considered to be "connected to" another mechanism, it may be directly connected to the other mechanism or there may be a central mechanism at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, a first feature being “above”, “above” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0032] The utility model provides a heat exchanger 100, wherein a flange plate 30 is arranged on one side of a flat tube 10 without a header 40, and the flange plate 30 can stop and limit the fin 20, thereby preventing the fin 20 from bouncing and other problems.

[0033] See also Figure 1 and Figure 5-Figure 7The heat exchanger 100 includes a plurality of flat tubes 10 and a plurality of fins 20. The plurality of flat tubes 10 are arranged at intervals along the thickness direction thereof, and fins 20 are arranged between adjacent flat tubes 10, and both sides of the fins 20 in the thickness direction are connected to the flat tubes 10; the flat tubes 10 are at least configured with a first channel 11, a second channel 12, and a connecting channel 13 connecting the first channel 11 and the second channel 12, and the flat tubes 10 have a limiting portion near the connecting channel 13 and one side of the flat tubes 10 near the connecting channel 13, and the limiting portion is extended along the thickness direction of the flat tubes 10. In this way, the fins 20 are located between the flat tubes 10, and the heat on each flat tube 10 can be transferred to the fins 20 on both sides along the thickness direction thereof, and the fins 20 increase the contact area between the flat tubes 10 and the air, thereby improving the heat exchange efficiency. In addition, the flat tube 10 is constructed with a first channel 11 and a second channel 12 connected to each other, so that when the heat exchange medium flows from the first channel 11 to the second channel 12, it will pass through the first channel 11 and flow to the second channel 12 through the connecting channel 13, and perform heat exchange twice in the process of flowing in the two channels, so that the heat exchange of the heat exchange medium is more thorough. Since the connecting channel 13 is far away from the inlet and the outlet, there is no manifold on the side of the connecting channel 13. The fin 20 on this side is prone to deformation and wing bounce problems due to the lack of a limiting structure. Therefore, the limiting part set on the connecting part relies on its abutment effect with the fin 20, so that the fin 20 is limited to the side of the limiting part facing the inlet, so that the structure of the heat exchanger 100 is more durable and stable.

[0034] It should be explained that the number of the flow channels (ie, the first channel 11 and the second channel 12) inside the flat tube 10 is not limited to two, and can be set to more than two, which can be flexibly adjusted according to work requirements. In this embodiment, two channels are taken as an example for detailed description.

[0035] Further, the limiting part is a flange plate 30 connected to the flat tube 10, and the flange plate 30 is extended along the thickness direction of the flat tube 10. There are multiple flange plates 30, and the multiple flange plates 30 are arranged at intervals along the width direction of the flat tube 10. And / or, there are multiple flange plates 30, at least two of which are extended in the opposite direction along the thickness direction of the flat tube 10. In this way, the multiple flange plates 30 can have a limiting effect on the multiple fins 20 to ensure their limiting effect on the fins 20. Moreover, the flange plates 30 are arranged at intervals, which can facilitate the fins 20 to discharge condensed water.

[0036] In other embodiments, the limiting portion may also be configured as a structure such as a protrusion and a rib, and is not limited to the above-mentioned flange plate 30 structure.

[0037] In view of the feature that the flange plates 30 are arranged at intervals, drain ports 23 are provided on both sides of the fin 20 in the width direction, and the drain ports 23 extend toward the center line of the fin 20 in the width direction, and the drain ports 23 do not overlap with the projection of the flange plates 30 on the fin 20, so the flange plates 30 will not block the drain ports 23, thereby preventing the flange plates 30 from affecting the drainage of the drain ports 23. The drain ports 23 are located between two adjacent flange plates 30, so the condensed water can be smoothly discharged from the drain ports 23 and between the two flange plates 30 without being blocked by the flange plates 30.

[0038] In other embodiments, the drain port 23 on the fin 20 may also be opened on only one side, and only needs to be staggered with the flange plate 30. The drain port 23 may also be set on both sides of the fin 20 in the length direction to further improve the drainage efficiency.

[0039] The two drainage openings 23 located on both sides of the fin 20 in the width direction can be arranged in an aligned manner to make drainage more normal, or can be arranged in an unaligned manner to improve the structural strength of the fin 20 .

[0040] The flange plate 30 extends along the thickness direction of the flat tube 10 to at least one adjacent flat tube 10. That is to say, not every flat tube 10 is provided with a flange plate 30, and some flange plates 30 can extend transversely and span multiple flat tubes 10 to stop and limit multiple fins 20 at the same time.

[0041] The length of the fin 20 is L, the width of the fin 20 is H, and the center line of the drain port 23 divides the fin 20 into an asymmetric first section 21 and a second section 22, so as to adapt to the internal structure of the asymmetric heat exchanger 100. The asymmetric arrangement of the drain port 23 can improve the heat exchange efficiency. The length of the first section 21 is less than the length of the second section 22, and the width of the drain port 23 along the length direction of the fin 20 is a.

[0042] Specifically, the shape of the flange plate 30 has various embodiments, which are described one by one here.

[0043] See also Figure 2 In one embodiment, the flange plate 30 is set to be rectangular, and the length of the flange plate 30 projected on the first section 21 is n, and the length of the first section 21 is b, satisfying b / 4≤n≤b-2 / a. In this way, it is ensured that the flange plate 30 will not be too short, resulting in insufficient abutment strength against the fin 20, and it is also prevented that the flange plate 30 will be too long, which will increase consumables, increase costs, and hinder the discharge of condensed water.

[0044] Since there are multiple flanged plates 30 , the projection of the adjacent flanged plates 30 is located on the second section 22 , and the length of the flanged plates 30 projected on the second section 22 is m, m=n, thereby providing a balanced abutment effect.

[0045] Of course, in other embodiments, m and n may not be equal to accommodate asymmetric fins 20. For example, the length of the fin 20 is L, satisfying (Lb) / 4≤m≤Lba / 2. Similarly, the length of m set in this way can be flexibly adjusted according to the length of the fin 20, the width of the drain port 23, and the division of the drain port 23 for the fin 20, which not only ensures that the flange plate 30 is not too short, resulting in insufficient abutment strength against the fin 20, but also prevents the flange plate 30 from being too long, which increases consumables and costs, and hinders the discharge of condensed water.

[0046] In this embodiment, the widths of the flanged plates 30 projected on the first section 21 and the second section 22 are the same and are both d, satisfying: H / 4≤d≤H. In this way, the width range of the flanged plates 30 is reasonably planned, and the abutment effect of the flanged plates 30 can also be ensured while comprehensively considering the drainage capacity and the cost of consumables.

[0047] See also Figure 3 In another embodiment, the flange plate 30 is set to be an ellipse, and the length of the major axis of the ellipse is n, and the length of the first section 21 is b, satisfying b / 4≤n≤b-2 / a. In this way, similar to the above, the coverage area and the effective area of ​​the flange plate 30 are guaranteed, and its abutment effect on the fin 20 is guaranteed, and the flange plate 30 is prevented from covering too large an area to affect the drainage of the fin 20.

[0048] See also Figure 4 In another embodiment, the flange plate 30 is set to be a triangle, and the length of the base of the triangle is n, and the height of the triangle is m. The relationship between n and m can inherit the various relationship formulas in the above rectangular embodiment, and its technical effect is similar to the above, which will not be repeated here.

[0049] In addition, the first channel 11 and the second channel 12 each have a plurality of protrusions 111, which extend along the thickness direction of the flat tube 10, and the plurality of protrusions 111 cooperate to form the first channel 11 and the second channel 12. The protrusions 111 are connected to the flat tube 10. The protrusions 111 can disturb the heat exchange medium flowing in the first channel 11 and the second channel 12, making the heat exchange medium in the flat tube 10 more uniform, avoiding heat concentration, and thus improving the heat exchange efficiency between the flat tube 10 and the fin 20.

[0050] Furthermore, the protrusion 111 is provided with through holes (not shown in the figure) along the length direction of the first channel 11 and / or the second channel 12 (that is, the flow direction of the heat exchange medium). In this way, it can not only disturb the heat exchange medium, but also ensure the smooth passage of the heat exchange medium, thereby avoiding the problem of insufficient flow rate of the heat exchange medium after turbulence.

[0051] Compared with the prior art, the present invention provides a flange plate 30 at one end of the flat tube 10, and avoids deformation and wing bounce of the fin 20 through the flange plate 30's abutment and limiting effect on the fin 20. In addition, the relationship between the size of the flange plate 30 and the size of the fin 20 is reasonably set, so that the flange plate 30 can achieve stable limiting abutment on the fin 20 without hindering the discharge of condensed water on the fin 20, and also takes into account the problems of consumables and cost.

[0052] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, 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, they should be considered to be within the scope of this specification.

[0053] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A heat exchanger, characterized in that: It comprises a plurality of flat tubes (10) and a plurality of fins (20), wherein the plurality of flat tubes (10) are arranged at intervals along the thickness direction thereof, and the fins (20) are arranged between adjacent flat tubes (10); The flat tube (10) is at least configured with a first channel (11), a second channel (12), and a connecting channel (13) connecting the first channel (11) and the second channel (12), and the flat tube (10) has a limiting portion on a side edge close to the connecting channel (13), and the limiting portion is extended along the thickness direction of the flat tube (10).

2. The heat exchanger according to claim 1, characterized in that: The limiting portion is a flange plate (30) connected to the flat tube (10), and the flange plate (30) is extended along the thickness direction of the flat tube (10).

3. The heat exchanger according to claim 2, characterized in that: There are a plurality of flange plates (30), and the plurality of flange plates (30) are arranged at intervals along the width direction of the flat tube (10); and / or there are a plurality of flange plates (30), wherein at least two of the flange plates (30) are arranged to extend in opposite directions along the thickness direction of the flat tube (10).

4. The heat exchanger according to claim 2, characterized in that: The flange plate (30) extends along the thickness direction of the flat tube (10) to at least one adjacent flat tube (10).

5. The heat exchanger according to claim 2, characterized in that: Drainage openings (23) are provided on both sides of the fin (20) in the width direction, the drainage openings (23) extend toward the center line of the fin (20) in the width direction, and the drainage openings (23) do not overlap with the projection of the flange plate (30) on the fin (20).

6. The heat exchanger according to claim 5, characterized in that The center line of the drain port (23) divides the fin (20) into an asymmetrical first section (21) and a second section (22); the length of the first section (21) is smaller than the length of the second section (22); along the length direction of the fin (20), the width of the drain port (23) is a; the flange plate (30) is rectangular, and the length of the flange plate (30) projected on the first section (21) is n; the length of the first section (21) is b, satisfying the following: b / 4≤n≤b-2 / a.

7. The heat exchanger according to claim 6, characterized in that The length of the flange plate (30) projected onto the second section (22) is m, satisfying m=n.

8. The heat exchanger according to claim 6, characterized in that The length of the fin (20) is L, the width of the fin (20) is H, the flange plate (30) is rectangular, and the length of the flange plate (30) projected on the second section (22) is m, the length of the fin (20) is L, satisfying (Lb) / 4≤m≤Lba / 2, and the width of the flange plate (30) is d, satisfying: H / 4≤d≤H.

9. The heat exchanger according to claim 2, characterized in that: The flange plate (30) is triangular, and the length of the bottom side of the flange plate (30) is n; and / or, The flange plate (30) is elliptical, and the major axis of the ellipse is n.

10. The heat exchanger according to claim 1, characterized in that The flat tube (10) has a plurality of protrusions (111) therein, the plurality of protrusions (111) extend along the thickness direction of the flat tube (10), and the plurality of protrusions (111) cooperate to form the first channel (11) and the second channel (12).

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