Flow equalizing assembly, liquid distributing device and indirect evaporative cooling system

Abstract

The invention relates to the technical field of refrigeration equipment, in particular to a flow equalizing assembly, a liquid distribution device and an indirect evaporative cooling system.The flow equalizing assembly comprises a flow guide plate and a flow equalizing plate; the flow guide plate comprises a first flow guide section and a second flow guide section, the first flow guide section extends in the vertical direction, the two sides of the first flow guide plate are a liquid injection side and a flow equalizing side respectively, and the second flow guide section is formed by extending the upper end of the first flow guide section towards the liquid injection side; the flow equalizing plates are arranged on the flow equalizing side, the flow equalizing plates transversely extend along the side wall of the first flow guide section, the number of the flow equalizing plates is n, the n flow equalizing plates are arranged at intervals in the vertical direction, a plurality of flow equalizing holes are formed in the ends, close to the first flow guide section, of the flow equalizing plates, and the flow equalizing holes are communicated with the first flow guide section. And the plurality of flow equalizing holes are sequentially arranged at intervals along the periphery of the flow equalizing plate.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration equipment, and particularly to a liquid distribution device and an indirect evaporative cooling system. Background Art

[0002] Indirect evaporative cooling systems have the advantages of energy conservation, economy, environmental protection, and improvement of indoor air quality, and are widely used in industrial and civil buildings. For an indirect evaporative cooling system, the heat transfer efficiency of an indirect evaporative cooling plate heat exchanger under wet conditions is higher than that under dry conditions, and the higher the water film coverage rate on the surface of the heat exchange core, the higher the heat transfer efficiency.

[0003] In the process of implementing the present invention, the inventors found that there are at least the following problems in the prior art:

[0004] Most of the current water distribution devices are designed for round-tube falling film evaporation cooling systems, and their application in plate falling film evaporation cooling systems is limited. For a round-tube falling film evaporation cooling system, the physical boundary of the falling film is a ring, which is symmetric up and down, left and right, and circumferentially in space. Whether it is falling film inside the tube or outside the tube, it is relatively simple and feasible to achieve uniform falling film; however, for a plate falling film evaporation cooling system, the physical boundary of the falling film is a rectangle, which is only symmetric up and down and left and right in space. When the falling film water flow flows down along the wall surface of the rectangular pipe, the liquid near the two side walls is easily restricted by the two side walls, resulting in non-uniform downward flow of the falling film water flow. Summary of the Invention

[0005] In order to overcome the above defects, the present application provides a liquid distribution device and an indirect evaporative cooling system, which are at least beneficial to improving the falling film uniformity of a falling film evaporation cooling system.

[0006] The present application proposes a flow equalizing assembly, including:

[0007] A deflector plate, including a first deflector section and a second deflector section. The first deflector section extends in the vertical direction. The two sides of the first deflector plate are respectively a liquid injection side and a flow equalizing side. The second deflector section extends from the upper end of the first deflector section towards the liquid injection side;

[0008] A flow equalizing plate is arranged on the flow equalizing side. The flow equalizing plate extends horizontally along the side wall of the first deflector section. The number of the flow equalizing plates is n, where n is a positive integer. The n flow equalizing plates are arranged at intervals in the vertical direction. A plurality of flow equalizing holes are formed at one end of the flow equalizing plate close to the first deflector section, and the plurality of flow equalizing holes are arranged at intervals in sequence along the periphery of the flow equalizing plate.

[0009] In one embodiment, the flow deflector further includes a third flow deflector section, which is formed by smoothly bending downward from the end of the second flow deflector section facing away from the first flow deflector section.

[0010] In one embodiment, a plurality of tooth grooves are recessed along the periphery of the lower end of the third flow deflector section.

[0011] In one embodiment, n≥2, and the n flow equalizing plates include a first flow equalizing plate and a second flow equalizing plate. The second flow equalizing plate is disposed at intervals below the first flow equalizing plate. A plurality of first flow equalizing holes are formed at one end of the first flow equalizing plate close to the first flow deflector section. The plurality of first flow equalizing holes are arranged at equal intervals along the periphery of the first flow equalizing plate, and the cross-sectional areas of the plurality of first flow equalizing holes are the same.

[0012] A plurality of second flow equalizing holes are formed at one end of the second flow equalizing plate close to the first flow deflector section. The plurality of second flow equalizing holes are arranged at intervals in sequence along the periphery of the second flow equalizing plate. The closer the injection hole is to the liquid injection side, the smaller the cross-sectional area of the second flow equalizing hole, and the greater the distance between two adjacent second flow equalizing holes.

[0013] In one embodiment, a water-absorbing cloth or a hydrophilic film is laid on the wall surface of the flow equalizing side of the first flow deflector section; and / or,

[0014] A water-absorbing cloth or a hydrophilic film is laid on the upper surface of the second flow deflector section; and / or,

[0015] A water-absorbing cloth or a hydrophilic film is laid on the upper surface of the flow equalizing plate.

[0016] This application also provides a liquid distribution device, including:

[0017] A liquid storage tank with liquid injection holes formed in its wall surface;

[0018] The flow equalizing assembly as described above. The flow equalizing assembly is disposed in the liquid storage tank and divides the interior of the liquid storage tank into a first chamber and a second chamber. The first chamber and the second chamber are located on the liquid injection side and the flow equalizing side respectively; and,

[0019] The liquid injection hole is communicated with the first chamber to inject liquid into the first chamber. The upper end of the first chamber is open for the liquid to flow into the second chamber along the second flow deflector section. The bottom of the second chamber is open for the liquid to flow out along the wall surface of the first flow deflector section through the flow equalizing holes.

[0020] In one embodiment, the liquid distribution device further includes a rectifying plate disposed in the first chamber. The rectifying plate divides the first chamber into a second cavity and a first cavity arranged in sequence from top to bottom. The liquid injection hole communicates with the first cavity to inject liquid into the first cavity. A plurality of rectifying holes are formed in the rectifying plate, and the rectifying holes communicate the first cavity and the second cavity.

[0021] In one embodiment, the number of the flow equalizing components is two. The two flow equalizing components are arranged oppositely. A first chamber is formed between the first flow guiding sections of the two flow equalizing components, and a second chamber is formed between the first flow guiding sections of the two flow equalizing components and the liquid storage tank.

[0022] The present application also provides an indirect evaporative cooling system, including:

[0023] The liquid distribution device as described above, wherein the liquid is a liquid;

[0024] A heat exchange core is disposed below the liquid distribution device. The heat exchange core includes a first channel and a second channel which are separately arranged. The liquid flowing out of the liquid distribution device flows down along the heat exchange wall surface of the first channel to exchange heat with the medium in the second channel.

[0025] In one embodiment, the first channel and the second channel are arranged in an interleaved manner. The number of the liquid distribution devices is multiple. One liquid distribution device is correspondingly disposed above one column of the second channels, and the liquid flowing out of one liquid distribution device flows down along the heat exchange wall surfaces of two adjacent columns of the second channels which are oppositely arranged.

[0026] The technical solution of the present application has at least the following beneficial effects:

[0027] The flow equalizing component of the present application is applicable to the liquid distribution device. By arranging the flow guiding plate and the flow equalizing plate which cooperate with each other in the flow equalizing component, the liquid distribution uniformity of the liquid distribution device can be significantly improved. When the flow equalizing component of the present application is applied to the liquid distribution device of the indirect evaporative cooling system, the falling film uniformity of the falling film evaporative cooling system can be significantly improved. In the present application, by providing the second flow guiding section for laterally spreading the liquid, it can be ensured that the liquid on the liquid injection side enters the flow equalizing side with the largest area (or the largest width), which is beneficial to the uniform spreading of the liquid on the wall surface of the second flow guiding section, thereby improving the liquid distribution uniformity or the falling film uniformity of the flow equalizing component; in addition, by arranging the flow equalizing plate on the flow equalizing side, the flow rate of the liquid on the wall surface of the first flow guiding section can be further controlled, and the influence caused by the liquid fluctuation during the liquid distribution process can be eliminated, so that the liquid flows out in a uniform film along the wall surface of the first flow guiding section, thereby achieving the effect of uniform liquid distribution or uniform falling film. Description of the Drawings

[0028] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0029] Figure 1 It is a schematic structural diagram of the liquid distribution device of the present application in an embodiment;

[0030] Figure 2 It is a schematic structural diagram of the flow equalizing component of the present application;

[0031] Figure 3 is Figure 1 a partial schematic diagram;

[0032] Figure 4 It is a schematic structural diagram of the indirect evaporative cooling system of the present application in an embodiment;

[0033] Figure 5 is Figure 4 a top view.

[0034] Reference numerals:

[0035] Label Name Label Name 100 Liquid distribution device 110 Liquid storage tank 110a First chamber <![CDATA[110a1]]> First cavity <![CDATA[110a2]]> Second cavity 110b Second chamber <![CDATA[110b1]]> Flow equalizing chamber 110c Liquid injection hole 140 Rectifying plate 140a Rectifying hole 200 Flow equalizing component 220 Deflecting plate 221 First deflecting section 221a Liquid injection side 221b Flow equalizing side 222 Second deflecting section 223 Third deflecting section 2231 Tooth groove 230 Flow equalizing plate 230a Flow equalizing hole 231 First flow equalizing plate 231a First flow equalizing hole 232 Second flow equalizing plate 232a Second flow equalizing hole 233 Third flow equalizing plate 233a Third flow equalizing hole 300 Heat exchange core 310 First channel 320 Second channel Specific embodiments

[0036] In order to better understand the technical solution of the present invention, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0037] It should be clear that the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative work belong to the scope of protection of the present invention.

[0038] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms of "a", "the" and "said" used in the embodiments of the present invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0039] It should be understood that the term " / and / " used herein is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B, which can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally indicates that the associated objects before and after are in an "or" relationship.

[0040] The present application proposes a liquid distribution device.

[0041] Please refer to Figure 1 、 Figure 2 and Figure 3, in the embodiment of the present application, the liquid distribution device 100 includes a liquid storage tank 110 and a flow equalizing assembly 200; wherein, the flow equalizing assembly 200 includes a guide plate 220 and a flow equalizing plate 230; the guide plate 220 includes a first guide section 221 and a second guide section 222, the first guide section 221 extends in the vertical direction, the two sides of the first guide plate 220 are respectively a liquid injection side 221a and a flow equalizing side 221b, and the second guide section 222 extends from the upper end of the first guide section 221 towards the liquid injection side 221a; the flow equalizing plate 230 is arranged on the flow equalizing side 221b, the flow equalizing plate 230 extends horizontally along the side wall of the first guide section 221, the number of the flow equalizing plates 230 is n, n is a positive integer, n flow equalizing plates 230 are arranged at intervals in the vertical direction, and a plurality of flow equalizing holes 230a are formed at one end of the flow equalizing plate 230 close to the first guide section 221, and the plurality of flow equalizing holes 230a are arranged at intervals in sequence along the periphery of the flow equalizing plate 230.

[0042] A liquid injection hole 110c is formed on the wall surface of the liquid storage tank 110; the flow equalizing assembly 200 is arranged in the liquid storage tank 110 and divides the interior of the liquid storage tank 110 into a first chamber 110a and a second chamber 110b, the first chamber 110a and the second chamber 110b are respectively located on the liquid injection side 221a and the flow equalizing side 221b; and, the liquid injection hole 110c is communicated with the first chamber 110a to inject liquid into the first chamber 110a, the upper end of the first chamber 110a is open for the liquid to flow into the second chamber 110b along the second guide section 222, and the bottom of the second chamber 110b is open for the liquid to flow out along the wall surface of the first guide section 221 through the flow equalizing holes 230a.

[0043] During the liquid distribution process of the liquid distribution device 100, liquid is injected into the first chamber 110a through the liquid injection holes 110c. As the liquid level rises, the liquid will overflow the second diversion section 222 and spread on the surface of the second diversion section 222, and then flow down along the wall surface of the first diversion section 221. Then, the liquid undergoes n times of uniform flow and falling film in the second chamber 110b (one uniform flow plate 230 corresponds to one time of uniform flow and falling film), thereby realizing n times of redistribution of the liquid, continuously reducing the flow rate of the liquid, and finally achieving the effect of uniform liquid distribution. During the above-mentioned uniform flow and falling film process, at the initial stage when the liquid flows through the uniform flow plate 230, the liquid level on the uniform flow plate 230 is relatively low and cannot overcome the wall resistance of the holes of the uniform flow plate 230 and other frictional resistances along the way to continue falling. When the liquid accumulates to the preset liquid level height above the uniform flow plate 230, the liquid can convert gravitational potential energy into kinetic energy, overcome the wall resistance of the holes of the uniform flow plate 230 and other frictional resistances along the way, and continue to flow down along the wall surface of the first diversion section 221; in order to make the liquid continuously flow down uniformly in the form of a film along the wall surface of the first diversion section 221, the operator can control the inflow rate of the liquid to maintain the liquid level height on the uniform flow plate 230 at the preset liquid level height.

[0044] The liquid distribution device 100 of the present application is not only applicable to the circular tube type falling film evaporation cooling system, but also applicable to the plate type falling film evaporation cooling system. Those skilled in the art can appropriately adjust the shape of the liquid distribution device 100 according to the specific application scenario. For example, when the liquid distribution device 100 is applied to the circular tube type falling film evaporation cooling system, considering that the physical boundary of the falling film is circular, the liquid storage tank 110 and the diversion plate 220 can both be set in a cylindrical shape. The diversion plate 220 is arranged in the middle of the liquid storage tank 110. A cylindrical first chamber 110a is provided in the middle of the diversion plate 220. A circular ring-shaped second chamber 110b is formed between the liquid storage tank 110 and the diversion plate 220. The uniform flow plate 230 is in a circular ring shape clamped between the liquid storage tank 110 and the diversion plate 220; when the liquid distribution device 100 is applied to the plate type falling film evaporation cooling system, considering that the physical boundary of the falling film is rectangular, the diversion plate 220 and the liquid storage tank 110 can both be set in a cuboid shape. The diversion plate 220 is arranged in the middle of the liquid storage tank 110. The uniform flow plate 230 is in a rectangular frame shape clamped between the liquid storage tank 110 and the diversion plate 220. A cuboid-shaped first chamber 110a is provided in the middle of the diversion plate 220. A rectangular column-shaped second chamber 110b is formed between the liquid storage tank 110 and the diversion plate 220; of course, the shapes of the diversion plate 220 and the uniform flow plate 230 can also be other shapes, and the number of the uniform flow components 200 can also be multiple. Those skilled in the art can adjust according to the actual situation.

[0045] The technical solution of the present application can significantly improve the liquid distribution uniformity of the liquid distribution device 100 by arranging a flow equalizing assembly 200 including the flow guiding plate 220 and the flow equalizing plate 230 as described above in the reservoir of the liquid distribution device 100. When the liquid distribution device 100 of the present application is applied to an indirect evaporative cooling system, the falling film uniformity of the falling film evaporative cooling system can be significantly improved. In the present application, by arranging the second flow guiding section 222 for laterally spreading the liquid, it can be ensured that the liquid in the first chamber 110a enters the second chamber 110b with the largest area (or the largest width), which is beneficial to the uniform spreading of the liquid on the wall surface of the second flow guiding section 222, thereby improving the liquid distribution uniformity or the falling film uniformity of the liquid distribution device 100; in addition, by arranging the flow equalizing plate 230 in the second chamber, the flow velocity of the liquid on the wall surface of the first flow guiding section 221 can be further controlled, eliminating the influence caused by the liquid fluctuation during the liquid distribution process, so that the liquid flows out uniformly in a film along the wall surface of the first flow guiding section 221, thereby achieving the effect of uniform liquid distribution or uniform falling film.

[0046] In an embodiment of the present application, those skilled in the art can adjust the specific number of the flow equalizing plates 230 according to the inlet flow rate of the liquid, the dimensions of the first flow guiding section 221, the second flow guiding section 222, the flow equalizing plate 230, and the size of the flow equalizing holes 230a.

[0047] Generally speaking, when the liquid flow rate is stable within a small range, by coordinating and adjusting the height of the second flow guiding section 222 and the aperture design of the flow equalizing holes 230a, setting only one flow equalizing plate 230 in the second chamber 110b can achieve a good effect of a uniform liquid film. Specifically:

[0048] In one embodiment, n = 1, the number of the flow equalizing plates 230 is one, and this flow equalizing plate 230 divides the second chamber 110b into cavities arranged one above the other in sequence. In this embodiment, after the liquid enters the second chamber 110b, it will accumulate to an ideal liquid level height on the flow equalizing plate 230 and maintain this ideal liquid level height by controlling its inlet flow rate. After the liquid falls film through this flow equalizing plate 230, it has a lower flow velocity or can form a uniform film on the first flow guiding section 221.

[0049] When the liquid flow rate exceeds a certain limit value, the liquid level height of the liquid on the first flow equalizing plate 231 will also increase accordingly. At this time, the flow velocity of the liquid passing through the first flow equalizing plate 231 will be very large. At the same time, due to the influence of the liquid flow fluctuation at the liquid injection hole 110c, the liquid outlet is seriously uneven. At this time, it is necessary to set multiple flow equalizing plates 230 as in the following embodiments to further control the liquid flow velocity:

[0050] Please refer toFigure 1 In one embodiment, n = 2, and the n flow equalizing plates 230 include a first flow equalizing plate 231 and a second flow equalizing plate 232. The second flow equalizing plate 232 is spaced below the first flow equalizing plate 231. During the liquid distribution process, after the liquid forms a falling film through the first flow equalizing plate 231, it still has a high kinetic energy, which is not conducive to the uniform distribution of the liquid film. However, by re - equalizing the flow through the second flow equalizing plate 232, the liquid flow rate can be further reduced to the ideal flow rate range.

[0051] In the above - mentioned embodiment, further, one end of the first flow equalizing plate 231 close to the first guiding section 221 is provided with a plurality of first flow equalizing holes 231a. The plurality of first flow equalizing holes 231a are arranged at equal intervals along the periphery of the first flow equalizing plate 231, and the cross - sectional areas of the plurality of first flow equalizing holes 231a are the same. Those skilled in the art can appropriately adjust the opening ratio of the first flow equalizing plate 231 according to the self - size of the first flow equalizing plate 231, the distance from the upper end of the first guiding section 221, and the adjustment of the liquid injection flow rate.

[0052] One end of the second flow equalizing plate 232 close to the first guiding section 221 is provided with a plurality of second flow equalizing holes 232a. The plurality of second flow equalizing holes 232a are arranged at intervals along the periphery of the second flow equalizing plate 232 in sequence. The closer to the liquid injection hole 110c, the smaller the cross - sectional area of the second flow equalizing hole 232a, and the larger the distance between two adjacent second flow equalizing holes 232a. By such an arrangement, the liquid flow on the entire wall surface of the first guiding section 221 can be effectively balanced, and the kinetic energy fluctuation caused by the liquid injection of the liquid injection hole 110c can be eliminated.

[0053] The shapes of the first flow equalizing holes 231a and the second flow equalizing holes 232a can independently be selected from circular, triangular, rectangular, trapezoidal or other regular / irregular shapes. Those skilled in the art can make a choice according to the actual situation, and the present application does not make specific limitations thereto.

[0054] Please refer to Figure 2 Analogously, the n flow equalizing plates 230 may further include a third flow equalizing plate 233, a fourth flow equalizing plate,..., an nth flow equalizing plate arranged in sequence below the second flow equalizing plate 232. The specific shapes or opening designs of the third flow equalizing plate 233, the fourth flow equalizing plate,..., the nth flow equalizing plate can refer to the first flow equalizing plate 231 and / or the second flow equalizing plate 232. Of course, appropriate adjustments can also be made on the basis of the first flow equalizing plate 231 and / or the second flow equalizing plate 232. The present application will not elaborate on it here.

[0055] Please refer to Figure 1, in one embodiment, the flow guiding plate 220 further includes a third flow guiding section 223, which is formed by smoothly bending downward from the end of the second flow guiding section 222 facing away from the first flow guiding section 221, and the third flow guiding section 223 is in an arc-shaped surface or a quasi-arc-shaped surface. The shape of the third flow guiding section 223 can be strip-shaped or ring-shaped, and those skilled in the art can design according to the actual situation.

[0056] During the liquid distribution process of the liquid distribution device 100, the liquid is injected into the first cavity 110a1 through the liquid injection hole 110c. As the liquid level rises, the liquid will overflow the third flow guiding section 223 and gradually spread toward the surface of the second flow guiding section 222 from the third flow guiding section 223, and then flow down along the wall surface of the first flow guiding section 221. In this embodiment, the third flow guiding section 223 is beneficial to eliminating the influence of the liquid surface tension, and its arc-shaped or quasi-arc-shaped surface similar to the blade surface is beneficial to guiding the liquid to enter the second flow guiding section 222 evenly.

[0057] Please refer to Figure 3 , further, in order to better eliminate the adverse effects (uneven flow) brought by the liquid surface tension, a plurality of tooth grooves 2231 are recessed along the periphery of the lower end of the third flow guiding section 223. The shape of the tooth grooves 2231 can be triangular, trapezoidal, streamline-shaped or other shapes, and the present application does not make specific limitations thereto.

[0058] In one embodiment, a water-absorbing cloth or a hydrophilic film is laid on the surface of any one or more of the first flow guiding section 221, the second flow guiding section 222, the third flow guiding section 223 and the flow equalizing plate 230; specifically, a water-absorbing cloth or a hydrophilic film is laid on the wall surface of the first flow guiding section 221 on the side of the flow equalizing side 221b (that is, the wall surface of the first flow guiding section 221 facing the second chamber 110b), and / or a water-absorbing cloth or a hydrophilic film is laid on the upper surface of the second flow guiding section 222, and / or a water-absorbing cloth or a hydrophilic film is laid on the upper surface of the flow equalizing plate 230. By laying a water-absorbing cloth or a hydrophilic film on the flow path of the liquid film, the liquid film can be guided to spread out, and the liquid inlet uniformity of each area can be ensured to the greatest extent.

[0059] Please refer to Figure 1 , the number of the flow equalizing assemblies 200 can also be two or more, and those skilled in the art can adjust according to the actual situation. In one embodiment, the number of the flow equalizing assemblies 200 is two, and the two flow equalizing assemblies 200 are arranged oppositely. A first chamber 110a is formed between the first flow guiding sections 221 of the two flow equalizing assemblies 200, and a second chamber 110b is formed between the first flow guiding sections 221 of the two flow equalizing assemblies 200 and the liquid storage pool 110.

[0060] In a specific embodiment, the reservoir is in the shape of a rectangular cuboid. The first diversion section 221, the second diversion section 222, the third diversion section 223, and the flow equalizing plate 230 are independently selected from a rectangular plate shape or a slit shape. The lengths of the reservoir, the first diversion section 221, the second diversion section 222, the third diversion section 223, and the flow equalizing plate 230 are the same. The height of the first diversion section 221 is higher than the width of the second diversion section 222, and the width of the second diversion section 222 is wider than the widths of the third diversion section 223 and the flow equalizing plate 230. Of course, those skilled in the art can also appropriately adjust the shapes or dimensions of the first diversion section 221, the second diversion section 222, the third diversion section 223, and the flow equalizing plate 230 according to the actual situation.

[0061] In the above specific embodiment, the liquid injection hole 110c is opened on the cavity wall of the first cavity 110a1, specifically, it can be the side wall or the bottom wall. However, since the liquid distribution device 100 is usually arranged above the cooling channel, generally, the liquid injection hole 110c is opened on the side wall of the first cavity 110a1.

[0062] Please continue to refer to Figure 1 , in an embodiment, the liquid distribution device 100 further includes a rectifying plate 140. The rectifying plate 140 is arranged in the first chamber 110a and divides the first chamber 110a into a second cavity 110a2 and a first cavity 110a1 which are arranged one above the other in sequence. The liquid injection hole 110c is communicated with the first cavity 110a1 to inject the coolant into the first cavity 110a1. A plurality of rectifying holes 140a are opened on the rectifying plate 140, and the rectifying holes 140a communicate the first cavity 110a1 and the second cavity 110a2. The rectifying plate 140 can be rectangular, square, or circular, and its specific shape depends on the shape of the first cavity 110a1. Those skilled in the art can design it according to the actual situation. The shape of the rectifying holes 140a can be circular, triangular, rectangular, trapezoidal, or other regular or irregular shapes. Those skilled in the art can select according to the actual situation, and the present application does not make specific limitations on this.

[0063] During the liquid distribution process of the liquid distribution device 100, the coolant is injected into the first cavity 110a1 through the liquid injection hole 110c. As the liquid level of the coolant rises, the coolant flows through the flow rectifying plate 140 and flows into the second cavity 110a2 from the flow rectifying holes 140a, then gradually overflows the second diversion section 222 and spreads on the surface of the second diversion section 222, and then flows down along the wall surface of the first diversion section 221. When the coolant is just injected into the first cavity 110a1, the liquid fluctuates greatly, and the large liquid fluctuation is not conducive to the subsequent uniform spreading of the coolant on the diversion plate 220. In this embodiment, by arranging the flow rectifying plate 140 in the first cavity 110a1 to rectify the liquid, the liquid fluctuation generated by the injection of the coolant can be eliminated or reduced, so that the liquid spreads more gently and uniformly on the surface of the second diversion section 222, thereby further improving the liquid distribution uniformity or falling film uniformity of the liquid distribution device 100.

[0064] Furthermore, the opening ratio of the flow rectifying plate 140 is 15%-30%, specifically 15%, 20%, 25%, 30% or any value between them. Within this range, the liquid can more easily and uniformly pass through the plurality of flow rectifying holes 140a from the first cavity 110a1 into the second cavity 110a2. When the opening ratio of the flow rectifying plate 140 is small, it is difficult for the liquid to overcome the frictional resistance along the way and pass through the flow rectifying holes 140a from the first cavity 110a1 into the second cavity 110a2; when the opening ratio of the flow rectifying holes 140a is large, the rectifying effect of the flow rectifying plate 140 is poor.

[0065] The plurality of flow rectifying holes 140a can be uniformly arranged on the flow rectifying plate 140; or, they can be non-uniformly arranged regularly on the flow rectifying plate 140, specifically: in the area of the flow rectifying plate 140 closer to the liquid injection hole 110c, the arranged flow rectifying holes 140a are denser. Considering the manufacturing difficulty, the former is usually easier to process and form. From the perspective of the rectifying effect, the latter can better eliminate the influence brought by the injection kinetic energy of the liquid injection hole 110c and further improve the rectifying effect of the flow rectifying plate 140.

[0066] During the liquid distribution process, the liquid flow fluctuation is one of the main reasons affecting the spreading uniformity of the liquid on the second diversion section 222. Based on this, the farther the flow rectifying plate 140 is from the liquid injection hole 110c, the more conducive it is to avoiding the liquid flow fluctuation caused by the injection of the liquid injection hole 110c, and the more conducive it is to realizing the uniform rectification of the liquid in the first cavity 110a1 by the flow rectifying plate 140.

[0067] In a preferred embodiment, the liquid injection hole 110c is opened on the side wall in the length direction of the first cavity 110a1. The distance between the liquid injection hole 110c and the bottom wall of the first cavity 110a1 is d1, and the distance between the liquid injection hole 110c and the rectifying plate 140 is d2, where d2≥2d1. Within the above range, the liquid fluctuation generated by injecting liquid into the liquid injection hole 110c has a relatively small impact on the liquid near the rectifying plate 140, and the liquid can pass through the rectifying plate 140 more evenly.

[0068] Please refer to Figure 2 and Figure 3 , the present application also proposes a flow equalizing component 200. The specific structure of this flow equalizing component 200 refers to the above embodiments. Since this flow equalizing component 200 adopts all the technical solutions of the above all embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one.

[0069] Please refer to Figure 4 and Figure 5 , the present application also provides an indirect evaporative cooling system, including a heat exchange core 300, and further including a liquid distribution device 100 disposed above the heat exchange core 300. The specific structure of this liquid distribution device 100 refers to the above embodiments. Since this indirect evaporative cooling system adopts all the technical solutions of the above all embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one. The heat exchange core 300 includes a first channel 310 and a second channel 320 which are separated. During operation, coolant is passed through the liquid injection port of the liquid distribution device 100, and the coolant flowing out of the liquid distribution device 100 will flow down along the heat exchange wall surface of the first channel 310 to exchange heat with the medium in the second channel 320.

[0070] In one embodiment, the heat exchange core 300 is in the shape of a cube or a cuboid. For the convenience of description, the cuboid is taken as an example below. The first channel 310 is a vertically extending cuboid channel, and the second channel 320 is a horizontally extending cuboid channel. A plurality of the first channels 310 are arranged in columns along the width direction (or length direction) of the heat exchange core 300, and a plurality of the second channels 320 are arranged in columns along the vertical direction. The columns of the first channels 310 and the columns of the second channels 320 are arranged in an alternating manner along the length direction (or width direction) of the heat exchange core 300. The liquid distribution device 100 is in the shape of a cuboid, and the number of the liquid distribution devices 100 is multiple. One liquid distribution device 100 is correspondingly disposed above one column of the second channels 320, and the coolant flowing out of this liquid distribution device 100 will flow down along the heat exchange wall surfaces of the first channels 310 on both sides of the second channel 320 below it.

[0071] Generally speaking, the coolant is water. In order to ensure that the liquid film spreads 100% on the heat exchange wall surface of the first channel 310, a hydrophilic film can be attached or plated on the heat exchange wall surface of the first channel 310. Preferably, the contact angle of this hydrophilic film is less than 20%, and the selected material should have the characteristics of high reliability and long service life. Those skilled in the art can make a selection according to the actual situation.

[0072] During the operation process, after the liquid flows out from the outlet of the liquid distribution device 100, it will flow down evenly along the heat exchange wall surfaces on the opposite sides of the first channel 310 (specifically, the heat exchange wall surfaces of the first channel 310 and the second channel 320). The liquid film will absorb the heat of the medium to be cooled in the second channel through the heat exchange wall surface, and then transfer it to the heat exchange medium in the first channel 310, achieving the effect of heat exchange between the media in the first channel 310 and the second channel 320.

[0073] In the indirect evaporation cooling system of the present application, the liquid distribution device 100 can evenly distribute liquid on the heat exchange wall surface of the first channel 310. On the one hand, it can improve the coverage rate of the liquid film on the heat exchange wall surface of the first channel 310. On the other hand, even for the liquid film near the side walls of the heat exchange wall surface, it will basically not cause uneven liquid flow due to being restricted by the adjacent side walls of the heat exchange wall surface. The unique setting of the liquid distribution device 100 improves the heat exchange efficiency of the heat exchange core 300.

[0074] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A current sharing component, characterized in that Comprising: A flow guide plate, including a first flow guide section and a second flow guide section. The first flow guide section extends in the vertical direction. The two sides of the first flow guide plate are respectively a liquid injection side and a flow equalizing side. The second flow guide section extends from the upper end of the first flow guide section towards the liquid injection side; A flow equalizing plate, disposed on the flow equalizing side. The flow equalizing plate extends horizontally along the side wall of the first flow guide section. The number of the flow equalizing plates is n, where n is a positive integer. The n flow equalizing plates are arranged at intervals in the vertical direction. A plurality of flow equalizing holes are formed at one end of the flow equalizing plate close to the first flow guide section. The plurality of flow equalizing holes are arranged at intervals in sequence along the periphery of the flow equalizing plate.

2. The current-sharing component according to claim 1, wherein The flow guide plate further includes a third flow guide section, which is formed by smoothly bending downward from one end of the second flow guide section facing away from the first flow guide section.

3. The current-sharing component according to claim 2, characterized in that, A plurality of tooth grooves are recessed along the periphery of the lower end of the third flow guide section.

4. The current-sharing component according to claim 1, characterized in that, n≥2. The n flow equalizing plates include a first flow equalizing plate and a second flow equalizing plate. The second flow equalizing plate is disposed at intervals below the first flow equalizing plate. A plurality of first flow equalizing holes are formed at one end of the first flow equalizing plate close to the first flow guide section. The plurality of first flow equalizing holes are arranged at equal intervals along the periphery of the first flow equalizing plate, and the cross-sectional areas of the plurality of first flow equalizing holes are the same; A plurality of second flow equalizing holes are formed at one end of the second flow equalizing plate close to the first flow guide section. The plurality of second flow equalizing holes are arranged at intervals in sequence along the periphery of the second flow equalizing plate. The closer the injection hole is to the liquid injection side, the smaller the cross-sectional area of the second flow equalizing hole, and the greater the distance between two adjacent second flow equalizing holes.

5. The current-sharing component according to any one of claims 1-4, characterized in that A water absorption cloth or a hydrophilic film is laid on the wall surface of the flow equalizing side of the first flow guide section; and / or, A water absorption cloth or a hydrophilic film is laid on the upper surface of the second flow guide section; and / or, A water absorption cloth or a hydrophilic film is laid on the upper surface of the flow equalizing plate.

6. A liquid distribution device, characterized in that, Comprising: A liquid storage tank, with a liquid injection hole opened on its wall surface; The flow equalizing assembly as described in any one of claims 1-5. The flow equalizing assembly is disposed in the liquid storage tank and divides the interior of the liquid storage tank into a first chamber and a second chamber. The first chamber and the second chamber are respectively located on the liquid injection side and the flow equalizing side; and, The liquid injection hole is communicated with the first chamber to inject liquid into the first chamber. The upper end of the first chamber is open for the liquid to flow into the second chamber along the second flow guide section. The bottom of the second chamber is open for the liquid to flow out along the wall surface of the first flow guide section through the flow equalizing holes.

7. The liquid distribution device according to claim 6, characterized in that, The liquid distribution device further includes a rectifying plate, which is disposed in the first chamber and divides the first chamber into a second cavity and a first cavity arranged in sequence from top to bottom. The liquid injection hole is communicated with the first cavity to inject liquid into the first cavity. A plurality of rectifying holes are formed on the rectifying plate, and the rectifying holes communicate the first cavity and the second cavity.

8. The liquid distribution device according to any one of claims 6-7, characterized in that, The number of the flow equalizing assemblies is two. The two flow equalizing assemblies are arranged oppositely. A first chamber is formed between the first flow guide sections of the two flow equalizing assemblies, and a second chamber is formed between the first flow guide sections of the two flow equalizing assemblies and the liquid storage tank.

9. An indirect evaporative cooling system, characterized in that, Comprising: The liquid distribution device according to any one of claims 6-8, wherein the liquid is a liquid; A heat exchange core is disposed below the liquid distribution device. The heat exchange core includes a first channel and a second channel that are separated. The liquid flowing out of the liquid distribution device flows down along the heat exchange wall surface of the first channel to exchange heat with the medium in the second channel.

10. The indirect evaporative cooling system according to claim 9, characterized in that, The first channel and the second channel are arranged in an alternating pattern. The number of the liquid distribution devices is multiple. One liquid distribution device is correspondingly disposed above one column of the second channels, and the liquid flowing out of one liquid distribution device flows down along the heat exchange wall surfaces of two adjacent columns of the second channels that are oppositely arranged.

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