Heat exchanger fin and plate heat exchanger

Abstract

The present invention relates to the technical field of heat exchangers, and disclosed are a heat exchanger fin and a plate heat exchanger. The heat exchanger fin comprises a fin body; multiple flow channel grooves are formed on both a first side and a second side of the fin body; the flow channel grooves on the first side are not communicated with the flow channel grooves on the second side; and multiple turbulence structures are arranged at intervals in each flow channel groove along the extension direction thereof. Mutually independent heat exchange channels can be respectively formed between two sides of the heat exchanger fin and partitions, a cold medium can be distributed into the multiple mutually independent flow channel grooves on the two sides of the fin body, and the cold media on the two sides do not intermix, so that the cold media on the two sides of the fin body both can exchange heat with a hot medium, preventing cold medium accumulation on one side of the heat exchanger fin, thereby improving the heat exchange efficiency of a heat exchanger. By arranging multiple turbulence structures at intervals in each flow channel groove, the cold medium flowing through the flow channel grooves is in a turbulent flow state, reducing the laminar boundary layer of a fluid in the flow channel grooves, and generating turbulence in the cold medium, thereby further improving the heat exchange efficiency of plate heat exchangers.

Description

Heat exchanger fin and plate heat exchanger TECHNICAL FIELD

[0001] The present application relates to the technical field of heat exchangers, in particular to a heat exchanger fin and a plate heat exchanger. BACKGROUND

[0002] Plate heat exchangers are widely used in the refrigeration industry, heating, ventilation and air conditioning, and other fields due to their high heat exchange efficiency, small heat loss, compact structure, and small footprint.

[0003] A plate heat exchanger is composed of multiple heat exchange plates stacked together, and heat exchange channels for circulating media are formed between the heat exchange plates. Cold media and hot media can exchange heat through the heat exchange plates. In the prior art, the heat exchange channels between adjacent two heat exchange plates are usually all through, and in the heat exchange process, the cold media are in two-phase state, and the liquid media will deposit at the bottom of the heat exchange channel due to gravity, that is, the cold media flow is not evenly distributed, which leads to ineffective heat exchange between the cold media and the hot media, and affects the heat exchange efficiency of the plate heat exchanger.

[0004] Therefore, there is an urgent need for a heat exchanger fin and a plate heat exchanger to solve the above problems. SUMMARY

[0005] Based on the above problems, the purpose of the present application is to provide a heat exchanger fin and a plate heat exchanger, which can improve the flow state of the cold media and improve the heat exchange efficiency of the plate heat exchanger.

[0006] To achieve the above purpose, the present application adopts the following technical scheme:

[0007] On the one hand, a heat exchanger fin is provided, which comprises a fin body, a plurality of flow channel grooves are arranged on the first side and the second side of the fin body, the flow channel grooves on the first side and the second side are not communicated with each other, a plurality of flow disturbance structures are arranged in each flow channel groove along the extension direction of the flow channel groove, the flow disturbance structures can make the media flowing through the flow channel groove in turbulent flow, and the first side and the second side are opposite sides of the fin body.

[0008] As an optional scheme of the heat exchanger fin of the present application, the first side and the second side of the fin body are convexly provided with flow channel convexes, the flow channel convexes on the first side of the fin body form flow channel grooves on the second side of the fin body, and the flow channel convexes on the second side of the fin body form flow channel grooves on the first side of the fin body; the plurality of flow channel grooves and the plurality of flow channel convexes on the first side of the fin body are arranged alternately, and the plurality of flow channel grooves and the plurality of flow channel convexes on the second side of the fin body are arranged alternately.

[0009] As an alternative of the heat exchanger fin of the present application, the flow channel groove extends in a serpentine shape, and the flow channel groove is provided with the flow disturbing structure at each wave crest and / or wave trough.

[0010] Alternatively, the flow channel groove extends in a polyline shape, and the flow channel groove is provided with the flow disturbing structure at each turning point.

[0011] As an alternative of the heat exchanger fin of the present application, the fin body is provided with a first inlet and a first outlet, the flow channel groove comprises a first flow channel, a second flow channel and a third flow channel which are sequentially communicated, the first flow channel is communicated with the first inlet, the third flow channel is communicated with the first outlet, and the second flow channel extends in a curve shape and is provided with a plurality of flow disturbing structures which are spaced apart along the extension direction of the second flow channel.

[0012] As an alternative of the heat exchanger fin of the present application, the first ends of the first flow channels of the plurality of flow channel grooves are distributed in a circumference direction and arranged at the periphery of the first inlet, the second ends of the first flow channels of the plurality of flow channel grooves are communicated with the first ends of the plurality of second flow channels one by one, the first ends of the third flow channels of the plurality of flow channel grooves are distributed in a circumference direction and arranged at the periphery of the first outlet, and the second ends of the third flow channels of the plurality of flow channel grooves are communicated with the second ends of the plurality of second flow channels one by one.

[0013] As an alternative of the heat exchanger fin of the present application, the first flow channel is a straight flow channel, a curved flow channel or a variable cross-section flow channel.

[0014] And / or, the third flow channel is a straight flow channel, a curved flow channel or a variable cross-section flow channel.

[0015] As an alternative of the heat exchanger fin of the present application, the lengths of the second flow channels of the plurality of flow channel grooves gradually increase from the middle region of the fin body to the edge regions.

[0016] As an alternative of the heat exchanger fin of the present application, the flow disturbing structure comprises a protruding point structure or a protruding strip structure which is protruded from the bottom wall of the flow channel groove; or, the flow disturbing structure comprises a protruding part which is protruded from the side wall of the flow channel groove.

[0017] And / or, the protruding height of the flow disturbing structure is not higher than the depth or width of the flow channel groove.

[0018] On the other hand, a plate heat exchanger is provided, which comprises a first end plate, a second end plate, a plurality of heat exchanger fins and a plurality of partition plates, each of the heat exchanger fins is stacked with the partition plates on both sides, the flow channel groove on the heat exchanger fin and the partition plate form a heat exchange channel therebetween, and the plurality of heat exchanger fins and the plurality of partition plates are clamped between the first end plate and the second end plate.

[0019] As an optional solution of the plate heat exchanger, the heat exchanger fins are first medium side fins, the plate heat exchanger further comprises second medium side fins, the first medium side fins and the second medium side fins are both provided with a plurality of the first medium side fins and the second medium side fins are stacked alternately, and the two sides of each first medium side fin are stacked with the partition plates, and the two sides of each second medium side fin are stacked with the partition plates;

[0020] The second medium side fin comprises a plurality of fin parts extending in a zigzag shape, a plurality of the fin parts are arranged in a first direction in sequence, and the teeth shapes of every two adjacent fin parts are arranged in a second direction in a staggered manner, and the first direction is perpendicular to the second direction.

[0021] The plate heat exchanger provided by the application has the beneficial effects that:

[0022] The plate heat exchanger provided by the application has the beneficial effects that: BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed to be used in the description of the embodiments of the application will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by the person skilled in the art according to the contents of the embodiments of the application and the drawings without any creative effort.

[0024] Fig. 1 is a structural schematic view of the heat exchanger fin provided by the first embodiment of the application;

[0025] Fig. 2 is a partial enlarged view of A in Fig. 1;

[0026] Fig. 3 is a top view of the heat exchanger fin provided by the first embodiment of the application;

[0027] Fig. 4 is a sectional view in the direction of C-C in Fig. 3;

[0028] Fig. 5 is a sectional view in the direction of D-D in Fig. 3;

[0029] Fig. 6 is a structural schematic view of the fin of the heat exchanger according to the second embodiment of the present application;

[0030] Fig. 7 is a structural schematic view of the plate heat exchanger according to the embodiment of the present application;

[0031] Fig. 8 is a partial view of Fig. 7;

[0032] Fig. 9 is an enlarged view of a portion of Fig. 8 at B;

[0033] Fig. 10 is a structural schematic view of a first partition according to the embodiment of the present application;

[0034] Fig. 11 is a structural schematic view of a second partition according to the embodiment of the present application;

[0035] Fig. 12 is a structural schematic view of a second medium-side fin according to the embodiment of the present application;

[0036] Fig. 13 is an enlarged view of a portion of Fig. 12 at E;

[0037] In the drawings:

[0038] 1 - fin body; 2 - cold source passage;

[0039] 11 - flow channel groove; 12 - flow channel convexity; 13 - turbulence structure; 14 - first inlet; 15 - first outlet;

[0040] 111 - first flow channel; 112 - second flow channel; 113 - third flow channel;

[0041] 10 - first medium-side fin; 20 - first end plate; 30 - second end plate; 40 - partition; 50 - heat source passage; 60 - second medium-side fin;

[0042] 201 - first medium inlet; 202 - first medium outlet; 203 - second medium inlet; 204 - second medium outlet;

[0043] 601 - fin portion; 602 - second inlet; 603 - second outlet. DETAILED DESCRIPTION

[0044] In order to make the technical problems solved by the present application, the technical solutions adopted and the technical effects achieved more apparent, the technical solutions of the embodiments of the present application will be further described in detail below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative effort belong to the scope of protection of the present application.

[0045] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0046] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood in a broad sense, for example, it can be fixed connection, or it can be detachable connection; can be mechanical connection, or can be electrical connection; can be directly connected, or can be indirectly connected through an intermediate medium; can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. Embodiment

[0047] As shown in FIGS. 1-5, the present embodiment provides a heat exchanger fin, which can improve the heat exchange efficiency of the plate heat exchanger. The heat exchanger fin comprises a fin body 1, a plurality of flow channel grooves 11 are arranged on the first side and the second side of the fin body 1, the flow channel grooves 11 on the first side and the flow channel grooves 11 on the second side are not communicated with each other, a plurality of flow disturbing structures 13 are arranged in each flow channel groove 11 along the extension direction of the flow channel groove 11, the flow disturbing structures 13 can make the medium flowing through the flow channel groove 11 in a turbulent manner, and the first side and the second side are opposite sides of the fin body 1. As shown in FIG. 1, the first side and the second side are the upper and lower sides of the fin body 1, respectively.

[0048] The heat exchanger fin provided by the embodiment is characterized in that flow channel grooves 11 are arranged on the first side and the second side of the fin body 1, and the flow channel grooves 11 on the first side and the second side are not communicated with each other, so that the two sides of the heat exchanger fin can form independent heat exchange channels (as shown in FIGS. 8 and 9) between the two sides and the partition plate 40. After the cold medium is introduced into the plate heat exchanger, the cold medium can be distributed into the multiple independent flow channel grooves 11 on the two sides of the fin body 1, and the cold medium on the two sides does not flow together, so that the cold medium on the two sides of the fin body 1 can exchange heat with the hot medium, and the cold medium is prevented from being deposited on one side of the heat exchange fin, thereby improving the heat exchange efficiency of the heat exchanger. The multiple turbulence structures 13 arranged in the flow channel grooves 11 can make the cold medium flowing in the flow channel grooves 11 in a turbulent manner, that is, the turbulence structures 13 can change the boundary layer distribution of the fluid in the flow channel grooves 11, reduce the laminar boundary layer, make the cold medium turbulent, and accelerate the heat exchange efficiency of the cold and hot medium, thereby further improving the heat exchange efficiency of the plate heat exchanger.

[0049] Optionally, referring to FIGS. 1, 2 and 4, the first side and the second side of the fin body 1 are convexly provided with flow channel convexes 12, the flow channel convexes 12 on the first side of the fin body 1 form flow channel grooves 11 on the second side of the fin body 1, and the flow channel convexes 12 on the second side of the fin body 1 form flow channel grooves 11 on the first side of the fin body 1; the multiple flow channel grooves 11 and the multiple flow channel convexes 12 on the first side of the fin body 1 are arranged in alternation, and the multiple flow channel grooves 11 and the multiple flow channel convexes 12 on the second side of the fin body 1 are arranged in alternation. That is, the fin body 1 is in a concave-convex plate structure, the heat exchanger fin can be integrally formed by stamping, the processing mode is simple, the processing cost can be reduced, and the thickness of the fin body 1 can be thin to ensure the heat exchange effect.

[0050] Optionally, referring to FIGS. 1, 2 and 3, the flow channel grooves 11 extend in a serpentine shape, and each wave crest and / or wave trough of the flow channel grooves 11 is provided with a turbulence structure 13. The serpentine flow channel grooves 11 can change the flow direction of the medium, make the medium turbulent in the flow channel grooves 11, accelerate the heat circulation speed between the cold medium and the hot medium, and improve the heat exchange efficiency. Meanwhile, the curved flow channel grooves 11 can prolong the flow channel length, increase the heat exchange time, and improve the heat exchange effect.

[0051] In the embodiment, referring to FIGS. 2 and 5, the wave crest and the wave trough of each flow channel groove 11 are provided with a turbulence structure 13, which can make the medium turbulent at the curved part of the flow channel groove 11, further strengthen the turbulent effect of the medium flow, and improve the heat exchange efficiency of the plate heat exchanger. In other embodiments, the turbulence structure 13 can be arranged only at the wave crest or the wave trough of the flow channel, as long as the heat exchange requirement can be met.

[0052] In some alternative embodiments, the flow channel groove 11 can also be bent in a zigzag shape, and the flow channel groove 11 is provided with the turbulence structure 13 at each turning point. The bent flow channel groove 11 can also change the flow direction of the medium, and the medium forms a turbulent flow in the flow channel groove 11, thereby improving the heat exchange efficiency. The turbulence structure 13 at the turning point can further strengthen the turbulent flow effect of the medium flow, and prevent the cold medium from depositing at the turning point, thereby improving the heat exchange efficiency.

[0053] Of course, the flow channel groove 11 can also be a straight flow channel groove, and a plurality of turbulence structures 13 are arranged at intervals in the straight flow channel groove. When passing through the plurality of turbulence structures 13, the medium in the flow channel groove 11 is disturbed to form a turbulent flow, thereby improving the heat exchange efficiency.

[0054] Alternatively, as shown in FIGS. 1 and 2, the turbulence structure 13 includes a protruding point structure protruding from the bottom wall of the flow channel groove 11. The protruding point structure can cause the medium to form a turbulent flow at the bottom wall of the flow channel groove 11, prevent the medium from depositing at the bottom wall of the flow channel groove 11, and improve the heat exchange efficiency. Exemplarily, the protruding surface of the protruding point structure is an arc surface, which can reduce the resistance to the flow of the medium generated by the protruding point structure, so that the medium has a certain flow speed, thereby ensuring the heat exchange efficiency.

[0055] In other embodiments, the turbulence structure 13 can also be a protruding strip structure protruding from the bottom wall of the flow channel groove 11, which can be a straight protruding strip or a wavy protruding strip, as long as it has a turbulent flow effect. The structure form is not limited to the above-mentioned structure forms.

[0056] Alternatively, the protruding height of the turbulence structure 13 is not higher than the depth of the flow channel groove 11, so that the baffle plate 40 can be attached to the fin body 1 to form a heat exchange channel, and the turbulence structure 13 can also avoid generating a large resistance to the flow of the medium.

[0057] In some alternative embodiments, the turbulence structure 13 can also be a protruding portion protruding from the side wall of the flow channel groove 11, as long as it can disturb the medium and prevent the medium from depositing.

[0058] Further, the protruding height of the turbulence structure 13 is not higher than the width of the flow channel groove 11, so that the turbulence structure 13 can avoid generating a large resistance to the flow of the medium.

[0059] Optionally, referring to FIG. 1, the fin body 1 is provided with a first inlet 14 and a first outlet 15, and the flow channel groove 11 comprises a first flow channel 111, a second flow channel 112 and a third flow channel 113 which are sequentially communicated, the first flow channel 111 is communicated with the first inlet 14, and the third flow channel 113 is communicated with the first outlet 15; the second flow channel 112 is curvedly extended, and a plurality of turbulence structures 13 are arranged in the second flow channel 112 and spaced apart along the extension direction of the second flow channel 112. The second flow channel 112 is designed as a curved flow channel, and the turbulence structures 13 are arranged in the second flow channel 112, so that the middle region of the fin body 1 (the region where the plurality of second flow channels 112 are located) forms a heat exchange region, the heat exchange area is large, and the media can be fully heat exchanged. Specifically, after the media enters from the first inlet 14, the media is distributed to the plurality of second flow channels 112 through the plurality of first flow channels 111, and after the media is heat exchanged in the heat exchange region where the plurality of second flow channels 112 are located, the media is collected to the first outlet 15 through the plurality of third flow channels 113, and the heat-exchanged media is discharged from the first outlet 15.

[0060] Optionally, referring to FIG. 1, the first ends of the plurality of first flow channels 111 of the plurality of flow channel grooves 11 are distributed in the periphery of the first inlet 14 in a circumferential direction, and the second ends of the plurality of first flow channels 111 of the plurality of flow channel grooves 11 are communicated with the first ends of the plurality of second flow channels 112 in a one-to-one correspondence. The first ends of the plurality of third flow channels 113 of the plurality of flow channel grooves 11 are distributed in the periphery of the first outlet 15 in a circumferential direction, and the second ends of the plurality of third flow channels 113 of the plurality of flow channel grooves 11 are communicated with the second ends of the plurality of second flow channels 112 in a one-to-one correspondence. The plurality of first flow channels 111 can make the media quickly distributed and enter the heat exchange region to fully exchange heat, thereby improving the heat exchange efficiency. The plurality of second flow channels 112 can make the heat-exchanged media smoothly collected to the first outlet 15, thereby improving the media flow efficiency.

[0061] Optionally, the first flow channel 111 is a straight flow channel, a curved flow channel or a variable cross-section flow channel. In this embodiment, as shown in FIG. 1, the first flow channel 111 is a variable cross-section curved flow channel, which gradually widens towards the second flow channel 112, so that the media can be quickly distributed to the plurality of second flow channels 112.

[0062] In other embodiments, the first flow channel 111 can also be designed as an equal cross-section straight flow channel or an equal cross-section curved flow channel. Alternatively, the first flow channel 111 can be designed as a variable cross-section straight flow channel.

[0063] Optionally, the third flow channel 113 is a straight flow channel, a curved flow channel or a variable cross-section flow channel. In this embodiment, the third flow channel 113 is a variable cross-section curved flow channel, which can change the flow rate of the media, so that the heat-exchanged media can be quickly collected to the first outlet 15. In other embodiments, the third flow channel 113 can also be designed as an equal cross-section straight flow channel or a curved flow channel, or a variable cross-section straight flow channel. Embodiment

[0064] The heat exchanger fin of the present embodiment is different from that of the first embodiment in that:

[0065] Optionally, referring to FIG. 6, the length of the second flow channel 112 of the plurality of flow channel grooves 11 gradually increases from the middle region of the fin body 1 to the two side edge regions. In this way, the medium entering the flow channel groove 11 from the first inlet 14 can stay at the edge region of the fin body 1 for a longer time to fully exchange heat, so that the overall heat exchange of the heat exchange fin is more uniform, thereby improving the heat exchange efficiency. Embodiment

[0066] As shown in FIGS. 7 and 8, the present embodiment provides a plate heat exchanger, which comprises a first end plate 20, a second end plate 30, a plurality of heat exchanger fins as described in any of the above embodiments, and a plurality of baffle plates 40. The two sides of each heat exchanger fin are stacked with a baffle plate 40, and the flow channel groove 11 on the heat exchanger fin and the baffle plate 40 together form a heat exchange channel. The plurality of heat exchanger fins and the plurality of baffle plates 40 are clamped between the first end plate 20 and the second end plate 30.

[0067] The plate heat exchanger using the heat exchanger fin can exchange heat between the cold medium and the hot medium on both sides of the fin body 1, avoiding the deposition of the cold medium on one side of the heat exchange fin, and improving the heat exchange efficiency of the heat exchanger. The plurality of turbulence structures 13 in the flow channel groove 11 can make the medium turbulent, further accelerating the heat exchange efficiency of the cold and hot medium, and improving the heat exchange efficiency of the plate heat exchanger.

[0068] Optionally, referring to FIGS. 7 and 8, the first end plate 20 is provided with a first medium inlet 201, a first medium outlet 202, a second medium inlet 203, and a second medium outlet 204. The cold medium is introduced from the first medium inlet 201, and the heat-exchanged cold medium is discharged from the first medium outlet 202. The hot medium is introduced from the second medium inlet 203, and the heat-exchanged hot medium is discharged from the second medium outlet 204. The first inlet 14 on the fin body 1 is in communication with the first medium inlet 201, and the first outlet 15 on the fin body 1 is in communication with the first medium outlet 202.

[0069] Optionally, referring to FIGS. 1, 7, 8, and 9, the heat exchanger fin is defined as a first medium side fin 10, and the plate heat exchanger further comprises a second medium side fin 60. A plurality of first medium side fins 10 and a plurality of second medium side fins 60 are provided, and the plurality of first medium side fins 10 and the plurality of second medium side fins 60 are stacked in turn. The two sides of each first medium side fin 10 are stacked with a baffle plate 40, and the two sides of each second medium side fin 60 are stacked with a baffle plate 40. The first medium side fin 10 and the corresponding baffle plate 40 together form a cold source channel 2, and the second medium side fin 60 and the corresponding baffle plate 40 together form a heat source channel 50.

[0070] As shown in FIG. 12, the second medium side fin 60 is provided with a second inlet 602 and a second outlet 603, the heat medium enters the heat source channel 50 from the second inlet 602, and the heat medium after heat exchange is discharged through the second outlet 603. Specifically, the cold medium from the first medium inlet 201 enters the plurality of cold source channels 2 through the first inlet 14 on the first medium side fin 10, and the hot medium from the second medium inlet 203 enters the heat source channel 50 through the second inlet 602 on the second medium side fin 60, and the cold medium in the cold source channel 2 exchanges heat with the hot medium in the heat source channel 50 through the partition plate 40.

[0071] Optionally, referring to FIGS. 9, 10 and 11, the partition plate 40 has two types, referring to the orientation in FIG. 9, the partition plate 40 close to the top of the first medium side fin 10 is the first type of partition plate, and the partition plate 40 close to the bottom of the first medium side fin 10 is the second type of partition plate, the positions of the angle holes on the two types of partition plates 40 are different to adapt to the first inlet 14 and the first outlet 15 on the first medium side fin 10 and the second inlet 602 and the second outlet 603 on the second medium side fin 60.

[0072] Optionally, referring to FIGS. 9, 12 and 13, the second medium side fin 60 includes a plurality of fin portions 601 extending in a zigzag shape, the plurality of fin portions 601 are arranged in a first direction in sequence, and the teeth shapes of every two adjacent fin portions 601 are arranged in a second direction in staggered manner, and the first direction is perpendicular to the second direction. The adjacent fin portions 601 are arranged in staggered manner, so that the heat source channel 50 is a meandering channel, the flow time of the heat medium in the heat source channel 50 is prolonged, the turbulence effect of the heat medium is increased, and the heat exchange efficiency is improved. Meanwhile, the fin portions 601 extending in a zigzag shape can increase the contact area between the second medium side fin 60 and the partition plate 40, and further improve the heat exchange efficiency.

[0073] In the embodiment, the first direction is the length direction of the second medium side fin 60, and the second direction is the width direction of the second medium side fin 60. The zigzags of each fin portion 601 are rectangular zigzags, and the zigzag densities of each fin portion 601 are the same.

[0074] In other embodiments, a part of the fin portions 601 can be designed to have denser zigzags, and another part of the fin portions 601 can be designed to have sparser zigzags, the fin portions 601 with denser zigzags and the fin portions 601 with sparser zigzags are arranged in staggered manner in the first direction, and the adjacent fin portions 601 are arranged in staggered manner in the second direction, which can further improve the turbulence effect on the heat medium and improve the heat exchange efficiency.

[0075] Note that the above merely describes preferred embodiments of the present application and the principles of the technology applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and that various obvious changes, modifications and substitutions can be made thereto without departing from the scope of the present application. Therefore, although the present application has been described in detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the claims.

Claims

1. Heat exchanger fin, characterized in that The fin body (1) is provided with a plurality of flow channel grooves (11) on both the first side and the second side, the flow channel grooves (11) on the first side and the flow channel grooves (11) on the second side are not communicated with each other, and each flow channel groove (11) is provided with a plurality of turbulence structures (13) at intervals along the extension direction of the flow channel groove (11), the turbulence structures (13) can make the medium flowing through the flow channel groove (11) in a turbulent manner, and the first side and the second side are opposite sides of the fin body (1).

2. The heat exchanger fin of claim 1, wherein The first side and the second side of the fin body (1) are provided with flow channel convexes (12), the flow channel convexes (12) on the first side of the fin body (1) form flow channel grooves (11) on the second side of the fin body (1), and the flow channel convexes (12) on the second side of the fin body (1) form flow channel grooves (11) on the first side of the fin body (1); the plurality of flow channel grooves (11) and the plurality of flow channel convexes (12) on the first side of the fin body (1) are arranged in sequence and staggered, and the plurality of flow channel grooves (11) and the plurality of flow channel convexes (12) on the second side of the fin body (1) are arranged in sequence and staggered.

3. The heat exchanger fin of claim 1, wherein The flow channel groove (11) extends in a serpentine shape, and the turbulence structure (13) is arranged at each wave peak and / or wave trough of the flow channel groove (11). Alternatively, the flow channel groove (11) extends in a polyline shape, and the turbulence structure (13) is arranged at each turning point of the flow channel groove (11).

4. The heat exchanger fin of claim 1, wherein The fin body (1) is provided with a first inlet (14) and a first outlet (15), the flow channel groove (11) includes a first flow channel (111), a second flow channel (112) and a third flow channel (113) communicated in sequence, the first flow channel (111) is communicated with the first inlet (14), the third flow channel (113) is communicated with the first outlet (15), the second flow channel (112) extends in a curved manner, and a plurality of turbulence structures (13) are arranged at intervals along the extension direction of the second flow channel (112).

5. The heat exchanger fin of claim 4, wherein The first ends of the first flow channels (111) of the plurality of flow channel grooves (11) are distributed at intervals in the periphery of the first inlet (14), the second ends of the first flow channels (111) of the plurality of flow channel grooves (11) and the first ends of the plurality of second flow channels (112) are communicated one by one, the first ends of the third flow channels (113) of the plurality of flow channel grooves (11) are distributed at intervals in the periphery of the first outlet (15), and the second ends of the third flow channels (113) of the plurality of flow channel grooves (11) and the second ends of the plurality of second flow channels (112) are communicated one by one.

6. The heat exchanger fin of claim 4, wherein The first flow channel (111) is a straight flow channel, a curved flow channel or a variable cross-section flow channel. And / or, the third flow channel (113) is a straight flow channel, a curved flow channel or a variable cross-section flow channel.

7. The heat exchanger fin of claim 4, wherein The lengths of the second flow channels (112) of the plurality of flow channel grooves (11) gradually increase from the middle region to the two side edge regions of the fin body (1).

8. The heat exchanger fin according to any one of claims 1 to 7, characterized in that The turbulence structure (13) comprises a bump structure or a strip structure protruding from the bottom wall of the flow channel groove (11); or the turbulence structure (13) comprises a protruding part protruding from the side wall of the flow channel groove (11); And / or the protruding height of the turbulence structure (13) is not higher than the depth or width of the flow channel groove (11).

9. A plate heat exchanger, characterized by The plate heat exchanger comprises a first end plate (20), a second end plate (30), a partition plate (40), and a plurality of heat exchanger fins according to any one of claims 1-8, both sides of each heat exchanger fin are stacked with the partition plate (40), a heat exchange channel is formed between the flow channel groove (11) on the heat exchanger fin and the partition plate (40), and a plurality of heat exchanger fins and a plurality of partition plates (40) are clamped between the first end plate (20) and the second end plate (30).

10. The plate heat exchanger according to claim 9, characterized in that The heat exchanger fin is a first medium side fin (10), the plate heat exchanger further comprises a second medium side fin (60), a plurality of the first medium side fins (10) and a plurality of the second medium side fins (60) are provided, the plurality of the first medium side fins (10) and the plurality of the second medium side fins (60) are staggered and stacked in sequence, and both sides of each first medium side fin (10) are stacked with the partition plate (40), both sides of each second medium side fin (60) are stacked with the partition plate (40); The second medium side fin (60) comprises a plurality of fin parts (601) extending in a zigzag shape, a plurality of the fin parts (601) are arranged in sequence along a first direction, and the tooth shapes of every two adjacent fin parts (601) are arranged in a second direction, the first direction is perpendicular to the second direction.

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