Heat exchange core and indirect evaporative cooling system

Abstract

The application discloses a heat exchange core and an indirect evaporative cooling system. The heat exchange core is provided with a cooling medium channel and a cooled medium channel which are distributed at intervals. A water storage pool is arranged at the upper portion of the heat exchange core. The water storage pool is provided with a water seepage structure. Water in the water storage pool can flow out of the water seepage structure and flow through the heat exchange wall surface of the cooling medium channel. Compared with a water film forming mode of spraying, the water loss caused by rebounding on the inner surface of the cooling medium channel can be avoided. Compared with a water film forming mode of spraying, the problem that the water is blown away can be avoided, so that the water utilization rate is improved, and the water saving effect of the heat exchange core is improved. Compared with the hydrophilic film material arranged on the heat exchange wall surface, the heat exchange effect is relatively stable while the wetness of the heat exchange wall surface is ensured, and the hydrophilic film material is not easily damaged after long-time use.

Description

Technical Field

[0001] This application relates to the field of heat exchange equipment technology, and in particular to a heat exchange core and an indirect evaporative cooling system. Background Technology

[0002] For indirect evaporative cooling systems, the heat exchange efficiency of indirect evaporative cooling plate heat exchangers is higher under wet conditions than under dry conditions. The higher the water film coverage on the surface of the heat exchange core, the higher the heat exchange efficiency.

[0003] Currently, the main method used is to spray water onto the heat exchanger wall of the heat exchanger core. However, when spraying water, the water impacts the heat exchanger wall, causing water to splash and thus wasting water resources.

[0004] Currently, in addition to spraying, misting is also used for membrane application. Although misting can reduce the impact of water, the water droplets produced by misting are small and easily blown away by the wind, thus wasting water resources and reducing the quality of the membrane.

[0005] Therefore, how to improve the heat exchange efficiency of the heat exchange core while simultaneously improving water utilization efficiency is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0006] The purpose of this application is to provide a heat exchange core and an indirect evaporative cooling system that can effectively improve the heat exchange efficiency of the heat exchange core and the water utilization efficiency.

[0007] To achieve the above objectives, this application provides the following technical solution:

[0008] A heat exchange core includes a cooling medium channel and a cooled medium channel spaced apart, the heat exchange core further comprising:

[0009] A water storage tank is located on the upper part of the heat exchange core. The water storage tank is provided with several seepage structures, through which water can flow out and pass through the heat exchange wall of the cooling medium channel.

[0010] Preferably, the heat exchange wall of the cooling medium channel is provided with a flow guide, which is used to spread the water flowing through the heat exchange wall.

[0011] Preferably, the guide section is a cross-shaped guide section, or a grid-shaped guide section, or a small corrugated guide section, or a pyramid-shaped guide section, or a biomimetic guide section.

[0012] Preferably, the cross-shaped flow guide structure includes multiple spaced-apart cross-shaped protrusions, and the width of the four branches of the cross-shaped protrusions gradually decreases from the inside to the outside.

[0013] Preferably, the plurality of the cross-shaped protrusions are distributed in a rectangular array.

[0014] Preferably, the biomimetic structure guide section includes one or more of the following: biomimetic plant leaf guide section, biomimetic lung guide section, biomimetic honeycomb structure guide section, biomimetic spider web guide section, and biomimetic butterfly wing guide section.

[0015] Preferably, the water-permeable structure is a microslit structure or a microporous structure.

[0016] Preferably, a plurality of water storage tanks are provided, each water storage tank being located above one of the cooling medium channels, and the water storage tanks are configured as elongated box structures; or, a plurality of water storage tanks are provided, each water storage tank being located above one of the cooling medium channels, and the water storage tanks are configured as U-shaped or U-shaped box structures; or, a plurality of water storage tanks are provided, each cooling medium channel having a plurality of cooling medium channel flow channels, each water storage tank being located above one of the cooling medium channel flow channels, and the water storage tanks are configured as U-shaped or U-shaped box structures.

[0017] An indirect evaporative cooling system includes the heat exchange core and water tank assembly described above.

[0018] The water tank assembly includes a high-level water tank disposed above each of the water storage tanks, and the high-level water tank is connected to each of the water storage tanks.

[0019] Preferably, the water tank assembly further includes a collection water tank disposed below the cooling medium channel, a main pipe and multiple branch pipes for connecting the high-level water tank and each of the water storage tanks; the collection water tank is equipped with a water pump for transporting water to the high-level water tank, the main pipe is connected to multiple branch pipes respectively, and each of the branch pipes is also connected to a water storage tank.

[0020] Preferably, each of the branch pipes is a small-diameter rubber pipe, and a soft plug is provided at the connection between each small-diameter rubber pipe and each of the water storage tanks.

[0021] Preferably, the elevated water tank is equipped with a cation exchange membrane.

[0022] Compared with existing technologies, the above technical solution has the following advantages:

[0023] This application provides a heat exchange core, which includes spaced-apart cooling medium channels and cooled medium channels. A water storage tank is located at the top of the heat exchange core and has a seepage structure. Water in the water storage tank can flow out through the seepage structure and pass through the heat exchange wall of the cooling medium channels. That is, the water flowing out from the seepage structure can form a water film as it flows through the heat exchange wall of the cooling medium channels. Compared with the water film formation method of spraying, this avoids water rebounding and loss on the inner surface of the cooling medium channels, and compared with the water film formation method of spraying, it avoids the problem of water being blown away. This improves water utilization and thus enhances the water-saving effect of the heat exchange core. Compared to setting a hydrophilic film material on the heat exchange wall, it can ensure the wettability of the heat exchange wall while maintaining a more stable heat exchange effect, and it is not easily damaged after long-term use. Furthermore, since the water storage tank is located above the heat exchange core, when a certain liquid level difference is maintained in the water storage tank, the water in the water storage tank will flow out from the permeation structure under the action of atmospheric pressure and flow through the heat exchange wall of the cooling medium channel to form a falling film, which can simultaneously improve the heat exchange efficiency and water utilization efficiency of the heat exchange core.

[0024] Furthermore, an indirect evaporative cooling system is provided, comprising the aforementioned heat exchange core and water tank assembly. The water tank assembly includes a high-level water tank positioned above each water storage tank, which is connected to each water storage tank. By positioning the high-level water tank above multiple water storage tanks, the gravity difference allows for water replenishment to multiple water storage tanks through a single high-level water tank, ensuring the continuity of water seepage from the water storage tanks. This maintains a consistent liquid level difference in the water seepage, ensuring that a water film can continuously form on the heat exchange wall surface. This simultaneously improves the heat exchange efficiency and water utilization efficiency of the indirect evaporative cooling system. Additionally, by using a single high-level water tank to replenish multiple water storage tanks, calcium and magnesium ions in the water can be periodically removed from the water in the high-level water tank, extending the service life of the indirect evaporative cooling system as much as possible. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0026] Figure 1 A three-dimensional structural schematic diagram of a heat exchange core provided in a specific embodiment of this application;

[0027] Figure 2 for Figure 1 Top view of the heat exchange core in the middle;

[0028] Figure 3 for Figure 1 A schematic diagram of the heat exchange wall structure in the diagram;

[0029] Figure 4 A top view of a water storage tank for a heat exchange core provided in one specific embodiment of this application;

[0030] Figure 5 A top view of another water storage tank provided for a specific embodiment of the heat exchange core in this application;

[0031] Figure 6 This is a schematic diagram of an indirect evaporative cooling system provided in an embodiment of this application;

[0032] Figure 7 This is a schematic diagram of another indirect evaporative cooling system provided in an embodiment of this application.

[0033] The attached figures are labeled as follows:

[0034] 10 is the heat exchange core, 11 is the cooling medium channel, 111 is the baffle, 112 is the cooling medium channel flow channel, 12 is the cooled medium channel, 13 is the heat exchange plate sheet, and 131 is the cross-shaped protrusion.

[0035] 20 is a water storage tank, and 21 is a permeable structure;

[0036] 30 is for fans;

[0037] 40 is the shell, 41 is the side cavity, 42 is the bottom cavity, 43 is the humidification valve, 44 is the primary air inlet, 45 is the primary air outlet, 46 is the secondary air inlet, and 47 is the secondary air outlet.

[0038] 50 is the high-level water tank, 51 is the main pipe, 52 is the collection water tank, 53 is the water delivery pipe, and 54 is the branch pipe. Detailed Implementation

[0039] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] Example 1

[0041] Please refer to the heat exchange core 10 provided in this embodiment. Figures 1-5It includes a water storage tank 20, wherein the heat exchange core 10 is provided with spaced cooling medium channels 11 and cooled medium channels 12, wherein the cooling medium channels 11 are vertical channels and the cooled medium channels 12 are horizontal channels, and the cooled medium can be air, water or refrigerant, etc. Figure 1 As shown, the arrow in the cooling medium channel 11 indicates the flow direction of the cooling medium, and the arrow in the cooled medium channel 12 indicates the flow direction of the cooled medium. A water storage tank 20 is located above the heat exchange core 10. The bottom of the water storage tank 20 has several permeable structures 21. Water in the water storage tank 20 flows out through the permeable structures 21 and passes through the heat exchange wall of the cooling medium channel 11. When flowing through the heat exchange wall of the cooling medium channel 11, a water film is formed on the heat exchange wall. The heat exchange wall refers to the surface through which the cooling medium flows. The heat exchange walls of cooling medium channel 11 and cooled medium channel 12 exchange heat through these walls. Specifically, the water film on the heat exchange wall within cooling medium channel 11 is formed through the permeation structure 21 of the water storage tank 20. The slow permeation of water through this structure increases the area of ​​the water film on the heat exchange wall, thus improving the coverage of the water film and allowing a larger area of ​​water film to participate in heat exchange. By absorbing heat from the heat exchange wall through a water film and then transferring it to the heat exchange medium in the cooling medium channel 11, the heat exchange efficiency between the cooling medium channel 11 and the cooled medium channel 12 can be increased. Compared with the method of forming a water film by spraying, it can avoid water rebounding and losing on the inner surface of the cooling medium channel 11. Compared with the method of forming a water film by spraying, it can avoid the problem of water being blown away, thereby improving the water utilization rate and thus improving the water-saving effect of the heat exchange core. Compared with setting a hydrophilic film material on the heat exchange wall, it can ensure the wettability of the heat exchange wall while having a more stable heat exchange effect, and it is not easily damaged after long-term use. Furthermore, by setting each water storage tank 20 on the upper part of the heat exchange core 10, when there is a certain liquid level difference in the water in the water storage tank 20, the self-permeable structure 21 in the water storage tank 20 will flow out under the action of atmospheric pressure and flow through the heat exchange wall of the cooling medium channel 11. During the process of flowing through the heat exchange wall of the cooling medium channel 11, a water film can be formed. The water film participates in heat exchange, thereby improving the heat exchange efficiency.

[0042] In some embodiments, the heat exchange wall of the cooling medium channel 11 is provided with a flow guide. When water flows out from the seepage structure 21 of the water storage tank 20 and flows through the heat exchange wall of the cooling medium channel 11, the flow guide can spread the water on the heat exchange wall to form a uniform water film on the heat exchange wall of the cooling medium channel 11, thereby further improving the coverage of the water film on the heat exchange wall and thus improving the heat exchange efficiency. The coverage of the water film on the heat exchange wall can reach up to 100%.

[0043] The flow guide section is one of the following: a cross-shaped flow guide section, a grid-shaped flow guide section, a small corrugated flow guide section, a pyramid-shaped flow guide section, or various biomimetic flow guide sections. Various biomimetic flow guide sections include one or more of the following: biomimetic plant leaf flow guide section, biomimetic lung flow guide section, biomimetic honeycomb structure flow guide section, biomimetic spider web flow guide section, and biomimetic butterfly wing flow guide section.

[0044] In some embodiments, such as Figure 3 As shown, the cross-shaped flow guide structure includes multiple spaced-apart cross-shaped protrusions 131, with the width of the four branches of each protrusion gradually decreasing from the inside out. For the cooling medium channel 11 with a smooth inner surface, when water flows through its heat exchange wall, the water film formed is difficult to completely cover the heat exchange wall, and the uniformity of the water film is also poor. Due to the low coverage of the water film, the contact area between the water film and the heat exchange wall is reduced, which is not conducive to indirect evaporative cooling heat exchange. When water comes into contact with the cross-shaped protrusions 131, the increase in the liquid contact angle is reduced due to the pinning effect of the solid-liquid contact line of the water film on the rib tips of the cross-shaped protrusions 131, thereby improving the water film coverage. In addition, the branch structure on both sides of the cross-shaped protrusions 131 can also guide the lateral spread of the water film, further improving the coverage of the water film on the heat exchange wall. The multiple cross-shaped protrusions 131 are preferably distributed in a rectangular array. Other distribution methods can also be used, as long as the water film can be spread on the heat exchange wall of the cooling medium channel 11 to increase the coverage of the water film on the heat exchange wall.

[0045] In addition, when using various biomimetic flow guides, the structure of the flow guide can be designed using biomimicry. Various natural objects with similar flow guide structures can be used, such as biomimetic plant leaves, lungs, beehives, spider webs, and butterfly wings. Thus, the same flow guide effect as the cross-shaped flow guide can be achieved through these biomimetic structures.

[0046] In some embodiments, the water-permeable structure 21 is a micro-slit structure or a microporous structure. The micro-slit structure can be an elongated hole, with the extension direction of the elongated hole parallel to the heat exchange wall surface within the cooling medium channel 11. That is, the length of the water-permeable structure 21 parallel to the heat exchange wall surface is not less than the width perpendicular to the heat exchange wall surface. Preferably, the length of the micro-slit structure is not less than the width of the heat exchange wall surface to ensure that the water permeating from the micro-slit structure can cover the heat exchange wall surface. The microporous structure can be a circular hole, an elliptical hole, a polygonal hole, etc. Specifically, multiple microporous structures can be evenly distributed along the width direction of the heat exchange wall surface at the bottom of the water storage tank 20. The microporous structure can slow down the water flow velocity, improve the uniformity of the water film and the coverage of the water film on the heat exchange wall surface, allowing more water to participate in heat exchange and saving water resources.

[0047] In some embodiments, the heat exchange core 10 is provided with a plurality of water storage tanks 20, that is, at least one water storage tank 20 is provided above the heat exchange core 10, and each water storage tank 20 is located above a cooling medium channel 12. The water storage tank 20 is preferably a long, narrow box structure, with its bottom surface in contact with the upper surface of the cooling medium channel 12. One or two bottom edges of the bottom surface of the water storage tank 20 are provided with permeable structures 21. The position and number of permeable structures 21 are related to the heat exchange wall surface, as long as they can allow water to flow through the heat exchange wall surface and form a water film. Figure 1 As shown, the flow direction of the cooled medium in the cooled medium channel 12 is horizontal, and the flow direction of the cooled medium in the cooled medium channel 11 is vertical.

[0048] In some embodiments, the heat exchange core 10 is provided with a plurality of water storage tanks 20, that is, at least one water storage tank 20 is provided above the heat exchange core 10, and each water storage tank 20 is located above a cooling medium channel 11. The water storage tank 20 is configured as a U-shaped or U-shaped box structure, wherein the U-shaped box structure can be a central triangular structure, a central circular structure, a central regular polygon structure, a central polygon structure, a central elliptical structure, etc., as long as the box structure can form a water storage tank structure and can form a uniform water film on the heat exchange wall surface through a water seepage structure. Specifically, as shown in the figure... Figure 4 As shown, the middle part of the water storage tank 20 is used for the vertical flow of cooling medium in the cooling medium channel 11, and the square ring structure of the water storage tank 20 is used for storing water.

[0049] In some embodiments, such as Figure 5 As shown, each cooling medium channel 11 is provided with a plurality of cooling medium channel flow channels 112, and each water storage tank 20 is located above a cooling medium channel flow channel 112. The water storage tank 20 is configured as a U-shaped or U-shaped box structure. The cooling medium channel 11 is provided with multiple cooling medium baffles 111 that divide it into multiple cooling medium channel flow channels 112. Preferably, the multiple cooling medium baffles 111 are vertically distributed at equal intervals to improve the uniformity of the cooling medium flow through the cooling medium channel 11. The bottom of the water storage tank 20 is provided with several permeable structures 21. Each cooling medium channel 112 corresponds to at least one permeable structure 21 to ensure that a water film can exist in each cooling medium channel 112, thereby improving the cooling uniformity of the cooling medium channel 11. Similarly, this type of U-shaped box structure can be a central triangle structure, a central circle structure, a central regular polygon structure, a central polygon structure, a central ellipse structure, etc., as long as the box structure can form a water storage tank structure and can form a uniform water film on the heat exchange wall surface through the permeable structures.

[0050] It should be noted that the internal structure of the water storage tank 20 can take various forms, such as a rectangular, polygonal, circular or elliptical cross-section, as long as the cooling medium in the cooling medium channel 11 can flow.

[0051] In some embodiments, such as Figure 1 As shown, the heat exchange core 10 includes at least three heat exchange plates 13, which are arranged at intervals to form a cooling medium channel 11 and a cooled medium channel 12. For example, the three heat exchange plates 13 are arranged vertically and are referred to as the first plate, the second plate, and the third plate, respectively. The space between the first plate and the second plate forms the cooled medium channel 12, and the space between the second plate and the third plate forms the cooling medium channel 11. A water storage tank 20 can be located at the top of the first plate and the second plate. Two sides of the water storage tank 20 are flush with the outer side of the first plate and the side of the second plate away from the first plate. That is, one side of the water storage tank 20 is flush with the side of the second plate facing the third plate. A seepage structure 21 can be opened on the bottom edge of this side of the water storage tank 20. The water flowing out of the seepage structure 21 can spread on the side of the second plate facing the third plate to form a water film. When more cooling medium channels 11 and cooled medium channels 12 are needed, more heat exchange plates 13 can be arranged sequentially at intervals behind the third plate. At this time, a water storage tank 20 can be set above each cooled medium channel 12.

[0052] Example 2

[0053] This embodiment provides an indirect evaporative cooling system, such as Figure 1-7 As shown, the indirect evaporative cooling system includes: a heat exchange core 10 and a water tank assembly; the heat exchange core 10 includes a plurality of water storage tanks 20, wherein the number of water storage tanks 20 is multiple, and the heat exchange core 10 adopts the heat exchange core of Embodiment 1, the specific structure of the heat exchange core will not be described in this embodiment.

[0054] The water tank assembly includes a collection water tank 52 located below the cooling medium channel 11 and a high-level water tank 50 located above each water storage tank 20. The high-level water tank 50 is connected to each water storage tank 20. The collection water tank 52 is equipped with a water pump for conveying water to the high-level water tank 50. The collection water tank 52 is connected to the high-level water tank 50 via a water supply pipe 53. The water pump is connected to the water pipe to pump water from the collection water tank 52 into the water pipe and deliver it to the high-level water tank 50. By setting up the high-level water tank 50 and placing it above multiple water storage tanks 20, the gravity difference can be used to supply water to multiple water storage tanks. Water is replenished to the water tank 20 to maintain the liquid level difference between the multiple water tanks 20. Thus, since each water tank 20 is located on the upper part of the heat exchange core 10, when a certain liquid level difference is maintained in the water tank 20, under the action of atmospheric pressure, the water in the water tank 20 flows out from the seepage structure and flows through the heat exchange wall of the cooling medium channel. During the process of flowing through the heat exchange wall of the cooling medium channel, a water film can be formed, thereby improving the heat exchange efficiency. In addition, the water flowing out of the cooling medium channel 11 can be recycled and reused by collecting the water tank 52 and the water pump, further improving the utilization rate of water resources.

[0055] In some embodiments, the water tank assembly further includes a main pipe 51 and multiple branch pipes 54. The elevated water tank 50 is connected to each water storage tank 20 via the main pipe 51 and the multiple branch pipes 54. The main pipe 51 is connected to each of the multiple branch pipes 54, and each branch pipe 54 is also connected to a water storage tank 20, or multiple branch pipes are connected to a single water storage tank 20, or one branch pipe 54 is connected to multiple water storage tanks 20. The water tank assembly allows for unified water replenishment to each water storage tank 20. Figure 2 , Figure 4 and Figure 5 As shown, the arrow in the branch pipe 54 points in the direction of water flow. Multiple water storage tanks 20 can also be replenished independently, that is, one water storage tank 20 is connected to one main pipe 51. Each branch pipe 54 uses a small-diameter rubber pipe. By using a small-diameter rubber pipe, water from the high-level water tank 50 can be slowly distributed to multiple water storage tanks 20 under the action of gravity difference, thereby preventing the problem of uneven water resource distribution among multiple water storage tanks 20 due to excessively fast water flow. The specific diameter of the small-diameter rubber pipe can be selected according to the relative position of the high-level water tank 50 and each water storage tank 20, as well as the number of water storage tanks 20. There are no restrictions here, as long as the pipe is small in diameter and can achieve slow water flow. Furthermore, the small-diameter rubber pipe can be circular, square, or other shapes. The connection between the small-diameter rubber pipe and the main pipe can be achieved by heat sealing welding, threaded connection, or snap-fit. In addition, a soft plug is provided at the connection between the small-diameter rubber pipe and each water storage tank 20 to improve the sealing of the connection and prevent water leakage.

[0056] In some embodiments, a cation exchange membrane is provided in the elevated water tank 50 to reduce the formation of scale. Alternatively, electromagnetic methods, lime methods, or other methods can be used to reduce the formation of scale in order to avoid clogging the seepage structure 21 of the water storage tank 20, thereby improving the smoothness of the water distribution membrane in the water storage tank 20.

[0057] In some embodiments, the cooled medium channel 12 is provided with a medium outlet communicating with the cooling medium channel 11, and the medium in the cooled medium channel 12, after being cooled, also partially enters the cooling medium channel 11 through the outlet. For example... Figure 1 As shown, the indirect evaporative cooling system also includes a fan 30 and a housing 40. A side cavity 41 is provided between the cooled medium channel and the inner wall of the housing 40, and a bottom cavity 42 is provided between the cooling medium channel and the inner bottom surface of the housing 40. The side cavity 41 and the bottom cavity 42 are connected. When air flows out of the cooled medium channel 12, it enters the side cavity 41 and then enters the cooling medium channel 11 through the bottom cavity 42. In this way, by re-entering the cooling medium channel 11 with some of the cooled low-temperature air, the air in the cooled medium channel 12 can be further cooled by the low-temperature air, which can further reduce the temperature of the cooled air. This process can realize dew point indirect evaporative cooling, maximize wet-bulb efficiency, and achieve better cooling effect.

[0058] In some embodiments, a valve 43 is provided in the side cavity 41 or the bottom cavity 42. The valve 43 is used to connect the side cavity 41 and the bottom cavity 42, or to isolate the side cavity 41 and the bottom cavity 42. When the temperature of the medium in the cooled medium channel 12 cannot reach the target low temperature, the valve 43 opens to connect the side cavity 41 and the bottom cavity 42. When the temperature of the medium in the cooled medium channel 12 reaches the target low temperature, the valve 43 can be closed. This allows for isohumidified cooling until the temperature approaches the dew point, and humidified heating until the outlet temperature approaches the wet-bulb temperature. This process enables indirect evaporative cooling at the dew point, maximizing wet-bulb efficiency.

[0059] In some embodiments, such as Figure 2 As shown, a primary air outlet 45 is provided on the side wall of the housing 40 corresponding to the outlet of the cooled medium channel 12. A primary air inlet 44 is provided at the end of the housing 40 away from the primary air outlet 45. A secondary air inlet 46 is provided on the side wall at the lower end of the housing 40, and a secondary air outlet 47 is provided on the side wall at the upper end of the housing 40. When the valve 43 is closed, all the air can flow out from the primary air outlet 45, thereby improving the operational flexibility of the indirect evaporative cooling system.

[0060] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0061] In the description of this application, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "back", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0062] The above provides a detailed description of a heat exchange core and plate heat exchanger provided in this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A heat exchange core comprising cooling medium passages and passages other than cooling medium passages which are arranged at intervals, characterized in that, The heat exchange core further comprises: a water storage pool arranged on the upper portion of the heat exchange core, the water storage pool being provided with a plurality of water seepage structures, water in the water storage pool being able to flow out of the water seepage structures and flow through the heat exchange wall surface of the cooling medium channel; the heat exchange wall surface of the cooling medium channel is provided with a flow guide portion for spreading water flowing through the heat exchange wall surface; the flow guide portion is a cross-shaped flow guide portion; the cross-shaped flow guide portion comprises a plurality of cross-shaped protrusions arranged at intervals, the four branches of the cross-shaped protrusions gradually tapering from inside to outside; the water seepage structure is a micro-slit structure or a micro-hole structure; a plurality of the water storage pools are arranged, each of the water storage pools being located above one of the cooling medium channels, the water storage pools being arranged in the form of long strip-shaped box structures; or a plurality of the water storage pools are arranged, each of the water storage pools being located above one of the cooling medium channels, the water storage pools being arranged in the form of a back-shaped or back-like box structure; or a plurality of the water storage pools are arranged, each of the cooling medium channels being provided with a plurality of cooling medium channel flow passages, each of the water storage pools being located above one of the cooling medium channel flow passages, the water storage pools being arranged in the form of a back-shaped or back-like box structure.

2. The heat exchange core of claim 1, wherein The plurality of cross-shaped protrusions are arranged in a rectangular array.

3. An indirect evaporative cooling system characterized in that, The water tank assembly comprises the heat exchange core and the water tank assembly. The water tank assembly comprises a high-level water tank arranged above each of the water storage pools, the high-level water tank being in communication with each of the water storage pools.

4. The indirect evaporative cooling system of claim 3, wherein, The water tank assembly further comprises a collection water tank arranged below the cooling medium channel, a main pipe and a plurality of branch pipes for communicating the high-level water tank and each of the water storage pools; the collection water tank is provided with a water pump for delivering water into the high-level water tank, the main pipe being in communication with the plurality of branch pipes, each of the branch pipes being in communication with one of the water storage pools.

5. The indirect evaporative cooling system of claim 4, wherein, Each of the branch pipes is a small-diameter rubber pipe, and each of the small-diameter rubber pipes is provided with a soft plug at the connection with each of the water storage pools.

6. The indirect evaporative cooling system of claim 3, wherein, The high-level water tank is provided with a cation exchange membrane.

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