Evaporative heat exchanger

Abstract

The application relates to the field of refrigeration technology, in particular to an evaporative heat exchanger. The evaporative heat exchanger comprises a heat exchange module, a liquid supply module, a conveying module and a rolling piece; the heat exchange module is provided with a heat exchange surface; the liquid supply module is provided with a liquid supply pipeline; the conveying module is provided with a conveying belt and a transmission mechanism connected to the conveying belt; the conveying belt is provided with an input port, an output port and a liquid storage cavity; the input port and the output port are arranged at intervals and are respectively communicated with the liquid storage cavity; the input port is communicated with the liquid supply pipeline so as to input the heat exchange medium into the liquid storage cavity; the rolling piece is arranged at the output port of the conveying belt; a flow gap is arranged between the rolling piece and the conveying module; the rolling piece is in rolling contact with the heat exchange surface and rolls out the heat exchange medium to the heat exchange surface through the flow gap, so that a uniform liquid film is formed and the heat exchange medium is fully evaporated to absorb heat. In this process, the rolling of the rolling piece does not cause large noise, and a good working environment is beneficial to maintenance.

Description

Technical Field

[0001] This application relates to the field of refrigeration technology, and in particular to an evaporative heat exchanger. Background Technology

[0002] Evaporative heat exchangers primarily cool the refrigerant through water evaporation. Currently, water spray systems are essential components in evaporative heat exchangers, water-spray heat exchangers, and cooling towers, significantly improving the heat exchange efficiency and overall heat transfer coefficient of air-cooled heat exchangers. In related technologies, condensate is sprayed onto the heat exchange tube assembly using a spray system. The condensate absorbs heat from the medium within the heat exchange tubes. The remaining condensate after heat exchange is collected in a circulating water tank and pumped back into the spray system for further circulation.

[0003] However, the high fluid velocity in the spray condensate method causes fluid collisions and splashes, resulting in significant noise that affects the working environment and user experience. Summary of the Invention

[0004] Therefore, it is necessary to provide an evaporative heat exchanger to reduce noise.

[0005] An evaporative heat exchanger includes a heat exchange module, a liquid supply module, a conveying module, and a rolling element. The heat exchange module has a heat exchange surface. The liquid supply module is provided with a liquid supply pipeline. The conveying module is provided with a conveyor belt and a transmission mechanism connected to the conveyor belt. The conveyor belt is provided with an inlet, an outlet, and a liquid storage chamber. The inlet and the outlet are spaced apart and respectively connected to the liquid storage chamber. The inlet is connected to the liquid supply pipeline. The rolling element is located at the outlet of the conveyor belt. A flow gap exists between the rolling element and the conveying module. The rolling element rolls and contacts the heat exchange surface and carries the heat exchange medium to the heat exchange surface through the flow gap.

[0006] Understandably, the transmission mechanism drives the conveyor belt to move, causing the rolling elements connected to the conveyor belt to roll on the heat exchange surface. The liquid supply line delivers the heat exchange medium from the inlet to the storage chamber, where it is collected and stored. The medium is then output through the outlet, where it comes into contact with the rolling elements. The rolling elements, through their own rolling motion, carry the medium out of the flow gap and coat it on the heat exchange surface, forming a uniform liquid film. This promotes the full evaporation and heat absorption of the heat exchange medium, cooling the refrigerant in the heat exchange module. This process avoids fluid collision and splashing, and the sound generated by the rolling elements is low-frequency, minimizing noise and contributing to a better working environment and user experience.

[0007] In one embodiment, the conveyor belt is configured as a ring, and the conveyor belt has an inner ring side and an outer ring side along its own thickness direction; the heat exchange module is provided on the outer ring side, the inner ring side is driven to the transmission mechanism, and the rolling element is assembled on the outer ring side; or, the heat exchange module is provided on the inner ring side, the rolling element is assembled on the inner ring side, and the outer ring side is driven to the transmission mechanism.

[0008] In one embodiment, the conveying module further includes an assembly housing connected to the conveyor belt. The assembly housing has a conveying cavity and a rolling outlet communicating with the conveying cavity. The conveying cavity is connected to the output port. The rolling element is rotatably assembled to the rolling outlet, and a flow gap exists between the rolling outlet and the rolling element.

[0009] In one embodiment, the heat exchange module is recessed inward and extends to form a flow channel on the heat exchange surface, and the rolling element rolls in contact with the inner wall of the flow channel and rolls along the extension direction of the flow channel.

[0010] In one embodiment, the number of flow channels is set to at least two, the at least two flow channels are spaced apart, the total area of ​​the projection of the at least two flow channels toward the heat exchange surface along their own concave direction is s, the area of ​​the heat exchange surface is S, and 0.9S≤s≤S.

[0011] In one embodiment, the heat exchange surface is set as a plane, the flow channel extends along a first direction and bends towards a second direction, and the bending dimension of the flow channel in the second direction is set as L1; the assembly housing is slidably connected to the output port along the second direction, and the assembly housing blocks the output port within the sliding stroke of the assembly housing along the second direction; along the second direction, the length dimension L2 of the output port where the rolling element corresponding to the flow channel is located is not less than the dimension L1 of the flow channel.

[0012] In one embodiment, in at least two of the flow channels, each flow channel rolls into contact with at least one corresponding rolling element; the conveyor belt is provided with one, the conveyor belt is provided with at least two rolling elements, and at least two flow channels roll into contact with the rolling elements on the corresponding conveyor belt; or, the conveyor belt is provided with at least two, each conveyor belt is provided with at least one rolling element, and one or at least two adjacent flow channels roll into contact with the rolling elements on the corresponding conveyor belt.

[0013] In one embodiment, multiple flow channels are spaced apart along the second direction; the projection portions of any two adjacent flow channels along the first direction overlap, and multiple rolling elements are staggered along the first direction and the second direction; or, any two adjacent flow channels are spaced apart along the projection of the first direction, and multiple rolling elements are spaced apart at least along the second direction.

[0014] In one embodiment, at least two of the flow channels form a flow channel group, wherein at least one of the flow channels is staggered with the other flow channels, and at least two of the rolling elements are staggered along the first direction and the second direction.

[0015] In one embodiment, the flow channel has a first flow segment and a second flow segment connected to the first flow segment, the first flow segment and the second flow segment being arranged at an angle; the included angle between the first flow segment and the second flow segment is defined as θ; a flow channel with θ≥90° is defined as the first flow channel, and a flow channel with θ<90° is defined as the second flow channel; the heat exchange module has multiple spaced first flow channels and / or second flow channels on the heat exchange surface; and / or, the heat exchange module has at least two staggered first flow channels and / or second flow channels on the heat exchange surface.

[0016] In one embodiment, the heat exchange surface is configured as a plane or a curved surface, and the heat exchange module has the heat exchange surface on at least one side along a third direction; or, the heat exchange surface is configured as a cylindrical surface, the heat exchange module has a heat exchange shaft, and the flow channel extends spirally along the axial direction of the heat exchange shaft; the transmission mechanism drives the conveyor belt to circulate around the axial direction of the heat exchange shaft, and drives the conveyor belt to move axially along the heat exchange shaft.

[0017] In one embodiment, the interior of the rolling element is configured as a cavity, and the surface of the rolling element is provided with a plurality of spaced-apart flow holes, each of which is connected to the cavity.

[0018] In one embodiment, the liquid supply pipeline includes a manifold and a distributor, with the inlet of the distributor connected to the manifold; the conveyor belt has a limiting part and a sealing cap movable between the inlet and the limiting part; the limiting part is disposed within the liquid storage cavity, and there is a flow space between the limiting part and the cavity wall of the liquid storage cavity at the edge of the inlet; the sealing cap has a first position and a second position; in the first position, the sealing cap abuts against the limiting part, and the outlet of the distributor is disposed above the inlet and communicates with the inlet; in the second position, the sealing cap blocks the inlet; the sealing cap switches between the first position and the second position as the conveyor belt circulates.

[0019] In one embodiment, the inlet is disposed away from the transmission mechanism; the liquid supply pipeline includes a manifold and a distributor; the distributor is connected between the manifold and the inlet; or, at least two conveyor belts are provided, the at least two conveyor belts are spaced apart and move synchronously, part of the distributor is connected between the manifold and the corresponding inlet, and another part of the distributor is connected between the inlets of any two adjacent conveyor belts. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the heat exchange module and the conveying module in one embodiment of the evaporative heat exchanger provided in this application;

[0022] Figure 2 This is a schematic diagram of the heat exchange module and the conveying module in another embodiment of the evaporative heat exchanger provided in this application.

[0023] Figure 3 A partially enlarged view of another embodiment of the evaporative heat exchanger provided in this application;

[0024] Figure 4 A schematic diagram of the structure of a rolling element in an embodiment of the evaporative heat exchanger provided in this application;

[0025] Figure 5 A schematic diagram of a structural embodiment of the evaporative heat exchanger provided in this application, showing the assembly of the shell and the conveyor belt;

[0026] Figure 6 A schematic diagram of another embodiment of the evaporative heat exchanger provided in this application, showing the assembly of the shell and the conveyor belt;

[0027] Figure 7 This is a schematic diagram of a structural configuration of a heat exchange module in a first embodiment of the evaporative heat exchanger provided in this application.

[0028] Figure 8 This is a schematic diagram of a case of a heat exchange module in a second embodiment of the evaporative heat exchanger provided in this application;

[0029] Figure 9 This is a schematic diagram of another case of the heat exchange module in the first embodiment of the evaporative heat exchanger provided in this application.

[0030] Figure 10 This is a schematic diagram of another case of the heat exchange module in the second embodiment of the evaporative heat exchanger provided in this application.

[0031] Figure 11 This is a schematic diagram of the structure of a third embodiment of the heat exchange module in the evaporative heat exchanger provided in this application;

[0032] Figure 12 This is a schematic diagram of the structure of a fourth embodiment of the heat exchange module in the evaporative heat exchanger provided in this application;

[0033] Figure 13 This is a schematic diagram of the fifth embodiment of the heat exchange module in the evaporative heat exchanger provided in this application.

[0034] Figure 14 This is a schematic diagram of the sixth embodiment of the heat exchange module in the evaporative heat exchanger provided in this application.

[0035] Figure 15 A schematic diagram of the structure of a conveying module in an embodiment of the evaporative heat exchanger provided in this application;

[0036] Figure 16 A schematic diagram of another embodiment of the conveying module in the evaporative heat exchanger provided in this application;

[0037] Figure 17 A cross-sectional view of the sealing cap at the inlet of the evaporative heat exchanger provided in this application, in the first position;

[0038] Figure 18 A cross-sectional view of the inlet sealing cap in the second position of the evaporative heat exchanger provided in this application;

[0039] Figure 19 A schematic diagram showing the structure of the evaporative heat exchanger provided in this application with the sealing cap at the inlet in the first position;

[0040] Figure 20 A schematic diagram of the structure of an embodiment of the evaporative heat exchanger provided in this application;

[0041] Figure 21 This is a schematic diagram of another embodiment of the evaporative heat exchanger provided in this application.

[0042] Reference numerals: 100, Evaporative heat exchanger; 10, Heat exchange module; 101, Heat exchange surface; 102, Flow channel; 1021, First flow channel; 1022, Second flow channel; 20, Liquid supply module; 21, Liquid supply pipeline; 211, Manifold; 212, Distributor; 22, Water pump; 23, Vibration damper; 24, Anti-fouling isolation valve; 25, Valve; 30, Conveying module; 31, Conveyor belt; 311, Inlet; 312, Outlet; 313, Liquid storage chamber; 314, Limiting part; 315, Sealing cap; 316, Sliding groove; 32, Transmission mechanism; 321, Driving component; 322, Transmission gear; 33, Assembly housing; 331, Conveying chamber; 332, Rolling outlet; 333, Sliding structure; 40, Rolling component; 401, Flow hole. Detailed Implementation

[0043] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0044] It should be noted that when a component is referred to as being "fixed to," "set on," or "properly placed on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0046] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0047] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0048] Please see Figures 1 to 21 This application provides an evaporative heat exchanger 100, which includes a heat exchange module 10, a liquid supply module 20, and a conveying module 30. A refrigerant flows through the heat exchange module 10, which has a heat exchange surface 101. An external medium contacts the heat exchange surface 101 to exchange heat with the refrigerant in the heat exchange module 10. The liquid supply module 20 is provided with a liquid supply pipe 21, which can convey the heat exchange medium to the conveying module 30.

[0049] Furthermore, the conveying module 30 is provided with a conveyor belt 31 and a transmission mechanism 32 connected to the conveyor belt 31; the conveyor belt 31 is provided with an inlet 311, an outlet 312 and a liquid storage chamber 313, the inlet 311 and the outlet 312 are spaced apart and respectively connected to the liquid storage chamber 313, and the inlet 311 is connected to the liquid supply pipeline 21. The evaporative heat exchanger 100 also includes a rolling element 40, which is provided at the outlet 312 of the conveyor belt 31. There is a flow gap between the rolling element 40 and the conveying module 30. The rolling element 40 rolls and contacts the heat exchange surface 101 and rolls the heat exchange medium to the heat exchange surface 101 through the flow gap.

[0050] Thus, the liquid supply line 21 inputs the heat exchange medium from the inlet 311 into the liquid storage chamber 313 of the conveyor belt 31. The conveyor belt 31 achieves belt transmission through the transmission mechanism 32, and outputs the heat exchange medium by rolling the rolling element 40 at the outlet 312. Specifically, during the rolling process of the rolling element 40, fluid adheres to the surface of the rolling element 40 in contact with the heat exchange medium to form a liquid film. When the rolling element 40 rotates, it can carry the liquid film out from the flow gap and contact the heat exchange surface 101, thereby forming a new liquid film on the heat exchange surface 101, realizing heat exchange with the refrigerant in the heat exchange module 10. Since the friction between the rolling element 40 and the heat exchange surface 101 is small, the noise generated is also small, and the fluid adhering to the rolling surface of the rolling element 40 can also play a role in vibration reduction and noise reduction, without generating pulse noise such as fluid splashing and impact, which is conducive to creating a good working environment.

[0051] In summary, by moving the conveyor belt 31 to drive the rolling element 40 to roll on the heat exchange surface 101, the heat exchange medium is output to the heat exchange surface 101. The heat exchange medium absorbs the heat of the refrigerant in the heat exchange module 10 and evaporates to cool the refrigerant. During the process, it is not easy to generate pulse noise such as fluid splashing and impact, which is conducive to creating a good working environment and improving the user experience.

[0052] For ease of explanation, this application uses a rectangular plane as an example for the heat exchange surface 101, i.e., the heat exchange module 10 is a plate-type heat exchange module. The length direction of the heat exchange surface 101 is defined as the second direction, the width direction as the first direction, and the thickness direction of the heat exchange module 10 as the third direction. The line containing the first direction is designated as the x-axis, the line containing the second direction as the y-axis, and the line containing the third direction as the z-axis.

[0053] like Figures 1 to 6 As shown, in a specific embodiment, the rolling element 40 uses spherical balls, which have a smooth surface to achieve smooth rolling and help reduce friction and noise.

[0054] In specific embodiments, the rolling element 40 can be made of materials such as plastic, metal, wood, or stone. If the rolling element 40 is made of plastic, its material and operating costs are low, and it is corrosion-resistant and durable. If the rolling element 40 is made of metal, it is easy to conduct heat, thereby enhancing heat exchange performance.

[0055] like Figure 4 As shown, in a further embodiment, the interior of the rolling element 40 is configured as a cavity, and the surface of the rolling element 40 is provided with a plurality of spaced-apart flow holes 401, each flow hole 401 communicating with the cavity. Thus, the heat exchange medium can directly enter the cavity through the flow holes 401 and be output from the flow holes 401 to the heat exchange surface 101 as the rolling element 40 rolls, which helps to accelerate the efficiency of the rolling element 40 in outputting the heat exchange medium and promotes the rapid output of the heat exchange medium to the heat exchange surface 101.

[0056] like Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 In an optional embodiment, the conveying module 30 further includes an assembly housing 33 connected to the conveyor belt 31. The assembly housing 33 has a conveying cavity 331 and a rolling outlet 332 communicating with the conveying cavity 331. The conveying cavity 331 communicates with the output port 312. The rolling element 40 is rotatably assembled to the rolling outlet 332, and a flow gap exists between the rolling outlet 332 and the rolling element 40. In this way, the rolling element 40 can be connected to the assembly housing 33 first, and then the assembly housing 33 can be connected to the conveyor belt 31, making the assembly simpler and improving the assembly efficiency. At the same time, the heat exchange medium can enter the conveying cavity 331 of the assembly housing 33 from the output port 312, and contact the surface of the rolling element 40 located in the conveying cavity 331, forming a liquid film on the surface of the rolling element 40. The rolling of the rolling element 40 carries the liquid film out from the flow gap between the rolling outlet 332 and the rolling element 40 to the heat exchange surface 101 for heat exchange with the refrigerant.

[0057] like Figure 5 and Figure 6 As shown, in a specific embodiment, one of the assembly housing 33 and the conveyor belt 31 is provided with a sliding groove 316, and the other is provided with a sliding structure 333. The sliding structure 333 is engaged with the sliding groove 316 and can move along the extension direction of the sliding groove 316 to realize the sliding of the assembly housing 33 relative to the conveyor belt 31. This is beneficial for the rolling element 40 to roll along the extension direction of the sliding groove 316 during the conveying process of the conveyor belt 31.

[0058] In a further embodiment, the sliding structure 333 is provided with a shielding part that blocks the opening of the sliding groove 316 throughout the sliding stroke to prevent leakage of the heat exchange medium during sliding. Simultaneously, under the gravity of the assembly housing 33 and the rolling element 40, the sliding structure 333 remains in close contact with the groove wall of the sliding groove 316 to prevent leakage of the heat exchange medium.

[0059] like Figure 5 As shown, in a specific embodiment, along the depth direction of the sliding groove 316, the portion of the sliding structure 333 located inside the sliding groove 316 and the sliding groove 316 gradually converge toward the rolling element 40. The sliding structure 333 forms an inclined mating surface, and the sliding groove 316 forms an inclined inner groove wall. The mating surface and the inner groove wall fit together to mutually limit each other and prevent the sliding structure 333 from coming out of the sliding groove 316.

[0060] like Figure 6As shown, in a specific embodiment, the portion of the sliding structure 333 within the sliding groove 316 is spherical to form a spherical surface. The sliding groove 316 is also correspondingly configured with an arc-shaped inner groove wall to engage with the sliding structure 333. The spherical surface and the arc-shaped inner groove wall mutually limit each other, preventing the sliding structure 333 from coming out of the sliding groove 316.

[0061] like Figures 7 to 14 As shown, in an optional embodiment, the heat exchange module 10 is recessed inward at the heat exchange surface 101 to form a flow channel 102. The rolling element 40 rolls against the inner wall of the flow channel 102 and rolls along the extension direction of the flow channel 102. Thus, the flow channel 102 confines the rolling element 40 within the flow channel 102, guiding the rolling element 40 to roll along the path formed by the flow channel 102, improving rolling stability. Simultaneously, the flow channel 102 increases the surface area of ​​the heat exchange module 10, which is beneficial for improving heat exchange efficiency.

[0062] In a specific embodiment, the number of flow channels 102 is set to at least two, and the at least two flow channels 102 are arranged at intervals. The total area of ​​the projection of the at least two flow channels 102 toward the heat exchange surface 101 along their respective concave directions is s, and the area of ​​the heat exchange surface 101 is S, where 0.9S ≤ s ≤ S. This arrangement ensures that the at least two flow channels 102 can fully cover the heat exchange surface 101, and the heat exchange medium can be uniformly coated and covered on the heat exchange surface 101, ensuring the heat exchange uniformity at all positions of the heat exchange surface 101 and improving the heat exchange efficiency. For example, s = 0.9S, 0.95S, or S.

[0063] It should be noted that, in order to clearly demonstrate the structure and arrangement of the flow channel 102, Figures 7 to 14 The diagram shown is only a schematic of the flow channel 102. In actual applications, the flow channel 102 should cover the heat exchange surface 101 as much as possible.

[0064] In one embodiment, in at least two flow channels 102, each flow channel 102 rolls into contact with at least one corresponding rolling element 40, ensuring that each flow channel 102 has heat exchange medium. By setting multiple flow channels 102, the heat exchange medium on the heat exchange surface 101 can be evenly distributed, which is beneficial to improving heat exchange efficiency, and it is only necessary to ensure that the rolling elements 40 do not interfere with each other.

[0065] In a further embodiment, the conveyor belt 31 is provided with at least two rolling elements 40, and at least two flow channels 102 are rolled in cooperation with the rolling elements 40 on the corresponding conveyor belt 31. In this case, only at least two output ports 312 need to be provided on the conveyor belt 31 to assemble at least two assembly housings 33, while only one input port 311 needs to be provided, which helps to simplify the assembly process of the input port 311 and the liquid supply pipeline 21.

[0066] In another embodiment, at least two conveyor belts 31 are provided, and each conveyor belt 31 is provided with at least one rolling element 40. One flow channel 102 is in rolling cooperation with the rolling element 40 on the corresponding conveyor belt 31. That is, each flow channel 102 corresponds to one conveyor belt 31. The movement of the rolling elements 40 between each flow channel 102 is independent of each other, and the normal rolling of other rolling elements 40 will not be affected by the failure of one rolling element 40.

[0067] In another embodiment, at least two conveyor belts 31 are provided, and each conveyor belt 31 is provided with at least one rolling element 40. At least two adjacent flow channels 102 are in rolling engagement with the rolling element 40 on the corresponding conveyor belt 31, so as to reduce the number of conveyor belts 31 and corresponding transmission mechanisms 32 and simplify the installation.

[0068] In practical applications, the number of rolling elements 40 on a conveyor belt 31 is negatively correlated with the speed of the conveyor belt 31. That is, the faster the transmission speed of the conveyor belt 31, the fewer rolling elements 40 are required on the conveyor belt 31; the slower the transmission speed of the conveyor belt 31, the more rolling elements 40 are required on the conveyor belt 31 to ensure the stability of the rolling elements 40 during rolling.

[0069] like Figure 1 and Figure 2 As shown, in an optional embodiment, the heat exchange surface 101 is set as a plane, that is, a flow channel 102 is provided on the plane. The flow channel 102 extends along a first direction and bends towards a second direction. The bent flow channel 102 can extend the movement path of the rolling element 40 so that more heat exchange medium can be output to the heat exchange surface 101 through the rolling element 40.

[0070] like Figure 7 and Figure 15 As shown, further, the dimension of the curvature of the flow channel 102 in the second direction is set to L1; the assembly housing 33 is slidably connected to the output port 312 in the second direction, within the sliding stroke of the assembly housing 33 in the second direction; in the second direction, the length dimension L2 of the output port 312 where the rolling element 40 corresponding to the flow channel 102 is located is not less than the dimension L1 of the flow channel 102, and the output port 312 has sufficient dimensions for the assembly housing 33 to move in the second direction so that the rolling element 40 can adapt to the flow channel 102 that is curved in the second direction and roll along the curved flow channel 102.

[0071] like Figures 7 to 11 As shown, in an optional embodiment, multiple flow channels 102 are arranged at intervals along the second direction, which is simple to arrange and easy to process and manufacture.

[0072] like Figure 9 and Figure 10As shown, in a further embodiment, the projection portions of any two adjacent flow channels 102 along the first direction overlap. This arrangement allows multiple flow channels 102 to be densely arranged, with each flow channel 102 containing heat exchange medium rolled out by a rolling element 40. This ensures a uniform distribution of the liquid film on the heat exchange surface 101, promoting uniform heat exchange for the refrigerant in the heat exchange module 10. Multiple rolling elements 40 are staggered along the first and second directions to avoid mutual interference.

[0073] like Figure 7 , Figure 8 and Figure 11 As shown, in another embodiment, any two adjacent flow channels 102 are arranged at a projection interval along the first direction, and a plurality of rolling elements 40 are arranged at least at a distance along the second direction. The corresponding input ports 311 are arranged at a distance along the second direction to cooperate with the corresponding flow channels 102. The movement between the rolling elements 40 in the plurality of flow channels 102 will not cause interference.

[0074] like Figures 12 to 14 As shown, in an optional embodiment, at least two flow channels 102 form a flow channel group. In the flow channel group, at least one flow channel 102 is staggered with the other flow channels 102 to increase the density of the flow channels 102, so that the flow channels 102 fully cover the heat exchange surface 101, promote the formation of a uniform liquid film on the heat exchange surface 101, and improve the heat exchange uniformity. Correspondingly, at least two rolling elements 40 are staggered along the first direction and the second direction so that the movement of the rolling elements 40 in each flow channel 102 does not interfere with each other.

[0075] like Figures 7 to 14As shown, in an optional embodiment, the flow channel 102 has a first flow section and a second flow section connected to the first flow section, with the first and second flow sections set at an angle. The angle between the first and second flow sections is defined as θ. The flow channel 102 with θ ≥ 90° is defined as the first flow channel 1021. The larger the angle θ, the smoother the first flow channel 1021, the smaller the turning angle of the rolling element 40 during its movement, the lower the resistance to movement, which is beneficial to the smooth rolling of the rolling element 40. At the same time, the larger the angle θ, the greater the centrifugal force experienced by the fluid flowing in the flow channel 102. The centrifugal force will generate an outward pressure gradient on the cross-section of the flow channel 102. This pressure gradient will cause the velocity distribution of the fluid on the cross-section of the flow channel 102 to be more uneven, thereby increasing the mechanical energy gradient. The larger the mechanical energy gradient, the worse the fluid stability and the more likely turbulence will occur. The greater the turbulence intensity of the heat exchange medium in the first flow channel 1021, the higher the heat exchange efficiency with the refrigerant in the heat exchange module 10. Meanwhile, the larger the angle θ, the smaller the size occupied by the first flow channel 1021 along the second direction, which is beneficial for arranging multiple first flow channels 1021 along the second direction to promote the formation of a uniform liquid film on the heat exchange surface 101 and improve heat exchange efficiency. Furthermore, the second flow channel 1022 is defined as θ < 90°. The smaller the angle θ, the smaller the influence of centrifugal force on the fluid, thereby reducing the pressure loss caused by centrifugal force and helping to reduce energy consumption.

[0076] like Figure 7 and Figure 9 As shown, in the first embodiment, the heat exchange module 10 has multiple spaced first flow channels 1021 on the heat exchange surface 101 to enhance turbulence intensity and improve heat exchange efficiency.

[0077] like Figure 8 and Figure 10 As shown, in the second embodiment, the heat exchange module 10 has multiple spaced second flow channels 1022 on the heat exchange surface 101 to reduce the overall pressure drop and further reduce energy loss.

[0078] like Figure 11 As shown, in the third embodiment, the heat exchange module 10 has multiple spaced first flow channels 1021 and second flow channels 1022 on the heat exchange surface 101 to achieve functional complementarity between the first flow channels 1021 and the second flow channels 1022, thereby enhancing the turbulence intensity while reducing pressure drop loss.

[0079] like Figure 12 As shown, in the fourth embodiment, the heat exchange module 10 has at least two staggered first flow channels 1021 on the heat exchange surface 101 to promote a denser arrangement of multiple first flow channels 1021 and enhance turbulence intensity.

[0080] like Figure 13As shown, in the fifth embodiment, the heat exchange module 10 has at least two staggered second flow channels 1022 on the heat exchange surface 101 to promote a denser arrangement of multiple second flow channels 1022 and reduce pressure drop loss.

[0081] like Figure 14 As shown, in the sixth embodiment, the heat exchange module 10 has at least two staggered first flow channels 1021 and second flow channels 1022 on the heat exchange surface 101. While making the first flow channels 1021 and second flow channels 1022 more densely arranged, the first flow channels 1021 and second flow channels 1022 complement each other, thereby strengthening the turbulence intensity and reducing pressure drop loss.

[0082] In other embodiments, the heat exchange surface 101 can also be configured as a curved surface to increase the surface area of ​​the heat exchange module 10, and the corresponding flow channel 102 is also longer, which facilitates more heat exchange medium to contact the heat exchange surface 101 at the same time, thereby improving heat exchange efficiency. In this case, the heat exchange module 10 is a cylindrical heat exchange module.

[0083] When the heat exchange surface 101 is set as a curved surface or a plane, the heat exchange module 10 has a heat exchange surface 101 on at least one side along the third direction. The heat exchange module 10 can have a heat exchange surface 101 on one side to exchange heat with the heat exchange medium, which simplifies the structure. Alternatively, it can have a heat exchange surface 101 on both sides to exchange heat with the heat exchange medium, which improves the heat exchange efficiency.

[0084] like Figure 1 , Figure 2 , Figure 15 , Figure 16 , Figure 20 and Figure 21 As shown, in a specific embodiment, the transmission mechanism 32 includes a drive member 321 and a transmission gear 322. The transmission gear 322 is connected between the drive member 321 and the conveyor belt 31. The conveyor belt 31 is configured as a toothed belt that meshes with the transmission gear 322 for transmission. The flexibility and tooth design of the toothed belt enable it to absorb shocks and vibrations during transmission, reducing vibration and noise, and resulting in smoother operation. The drive member 321 provides power to the transmission gear 322. For example, the drive member 321 can be configured as a motor.

[0085] like Figure 1 , Figure 2 , Figure 3 , Figure 15 , Figure 16 , Figure 20 and Figure 21 As shown, in a specific embodiment, the conveyor belt 31 is configured as a ring, and the conveyor belt 31 has an inner ring side and an outer ring side along its own thickness direction. The transmission mechanism 32 drives the conveyor belt 31 to circulate.

[0086] like Figure 1 , Figure 15 and Figure 20 As shown, in a specific embodiment, a heat exchange module 10 is provided on the outer ring side, and the inner ring side is drivenly connected to the transmission mechanism 32, while the outer ring side is equipped with a rolling element 40 to avoid interference between the rolling element 40 and the transmission mechanism 32. Furthermore, the conveyor belt 31 is tensioned to the transmission gear 322, and the inner ring side is provided with meshing teeth that mesh with the transmission gear 322.

[0087] like Figure 2 , Figure 3 , Figure 16 and Figure 21 As shown, in a specific embodiment, a heat exchange module 10 is provided on the inner ring side, and a rolling element 40 is assembled on the inner ring side. A conveyor belt 31 is sleeved on the outside of the heat exchange module 10, and the outer ring side is drivenly connected to the transmission mechanism 32 to avoid interference between the rolling element 40 and the transmission mechanism 32. Furthermore, the outer ring side is provided with meshing teeth that mesh with the transmission gear 322.

[0088] In a specific embodiment, when a heat exchange module 10 is provided on the inner ring side of the conveyor belt 31, multiple heat exchange modules 10 can be provided. The multiple heat exchange modules 10 are spaced apart, and each heat exchange module 10 is fitted with a corresponding conveyor belt 31. There is a gap between the conveyor belts 31 outside any two adjacent heat exchange modules 10 to avoid interference.

[0089] In other embodiments, the heat exchange surface 101 may also be configured as a cylindrical surface, the heat exchange module 10 has a heat exchange shaft, and the flow channel 102 extends spirally along the axial direction of the heat exchange shaft; the transmission mechanism 32 drives the conveyor belt 31 to circulate around the axial direction of the heat exchange shaft, and drives the conveyor belt 31 to move along the axial direction of the heat exchange shaft so that the rolling element 40 can roll along the spiral flow channel 102.

[0090] In a specific embodiment, the transmission mechanism 32 includes a first transmission component and a second transmission component, which are connected. The first transmission component is used to drive the conveyor belt 31 to circulate axially around the heat exchange shaft, and the second transmission component drives the first transmission component to move axially along the heat exchange shaft, thereby realizing the axial movement of the conveyor belt 31 along the heat exchange shaft.

[0091] In a specific embodiment, the first transmission assembly includes a transmission gear 322 and a motor. The motor drives the transmission gear 322 to rotate, and the conveyor belt 31 is configured as a toothed belt that meshes with the transmission gear 322 to rotate around the heat exchange axis. The second transmission assembly includes a cylinder, which can be connected to the motor to achieve synchronous lifting and lowering of the first transmission assembly and the conveyor belt 31. In other embodiments, an electric actuator or similar device can be used to achieve linear drive of the conveyor belt 31.

[0092] like Figure 20 and Figure 21As shown, in an optional embodiment, the liquid supply line 21 includes a manifold 211 and a distributor 212. The inlet of the distributor 212 is connected to the manifold 211. The manifold 211 can concentrate and collect the heat exchange medium and distribute it to the distributor 212. The medium is then transported to the corresponding inlet 311 by different distributors 212.

[0093] like Figures 17 to 19 As shown, in an optional embodiment, the conveyor belt 31 is provided with a limiting part 314 and a sealing cover 315 that is movable between the inlet 311 and the limiting part 314; the limiting part 314 is provided in the liquid storage cavity 313, and there is a flow space between the limiting part 314 and the cavity wall of the liquid storage cavity 313 at the edge of the inlet 311, and the limiting part 314 can restrict the movement of the sealing cover 315 between the inlet 311 and the limiting part 314.

[0094] The sealing cap 315 has a first position and a second position. In the first position, the sealing cap 315 abuts against the limiting part 314, and the outlet of the liquid distribution pipe 212 is located above and connected to the inlet 311, i.e., the inlet 311 faces upward. Under the action of gravity, the sealing cap 315 abuts against the limiting part 314, and the heat exchange medium in the liquid distribution pipe 212 flows from top to bottom to the inlet 311 and enters the liquid storage chamber 313. In the second position, the sealing cap 315 blocks the inlet 311, i.e., the inlet 311 faces downward. The sealing cap 315 blocks the inlet 311 so that the heat exchange medium in the liquid storage chamber 313 is not easily allowed to flow out. The sealing cap 315 switches between the first and second positions as the conveyor belt 31 circulates.

[0095] In another optional embodiment, the inlet 311 is positioned away from the transmission mechanism 32, and the liquid distribution pipe 212 is connected between the manifold 211 and the inlet 311. When the conveyor belt 31 is used for cyclic conveying, if the outer ring side of the conveyor belt 31 is connected to the transmission mechanism 32, the inlet 311 is located on the inner ring side and the side wall of the conveyor belt 31; if the inner ring side of the conveyor belt 31 is connected to the transmission mechanism 32, the inlet 311 is located on the outer ring side and the side wall of the conveyor belt 31. In other embodiments, the conveyor belt 31 can be driven to reciprocate along a first direction instead of performing circular cyclic conveying; that is, it can first convey a first distance in the forward direction, and then move a first distance in the reverse direction. In this case, the inlet 311 can be located on any surface of the conveyor belt 31 other than the surface in contact with the transmission mechanism 32.

[0096] In more embodiments, at least two conveyor belts 31 are provided, and the at least two conveyor belts 31 are arranged at intervals and move synchronously. Part of the liquid distribution pipe 212 is connected between the collection pipe 211 and the corresponding inlet 311, and another part of the liquid distribution pipe 212 is connected between the inlets 311 of any two adjacent conveyor belts 31. In this way, it is not necessary to connect the liquid distribution pipe 212 connected to each conveyor belt 31 to the collection pipe 211. The distance between two adjacent conveyor belts 31 is relatively close, the required length of the liquid distribution pipe 212 is relatively short, and it is not easy for the liquid distribution pipes 212 to become entangled. This makes it easier for the conveyor belts 31 to move in a circular manner.

[0097] In a specific embodiment, the liquid distribution pipe 212 is configured as a flexible tube, which can deform to adapt to the movement of the conveyor belt 31 and return to its original shape after the absence of external force.

[0098] like Figure 20 and Figure 21 As shown, in an optional embodiment, the liquid supply module 20 further includes a water pump 22, which is connected to the manifold 211 to pump the heat exchange medium into the manifold 211, providing a power source for the flow of the heat exchange medium.

[0099] In a specific embodiment, the liquid supply module 20 also includes a liquid storage tank, which stores heat exchange medium. The liquid storage tank is connected to the water pump 22 through a pipeline, and the water pump 22 pumps the heat exchange medium in the liquid storage tank into the manifold 211 through the pipeline.

[0100] In a specific embodiment, a shock-absorbing throat 23 is connected to the pipeline between the liquid storage tank and the water pump 22 to achieve a shock absorption function. Furthermore, a contamination-proof isolation valve 24 is connected to the pipeline between the liquid storage tank and the water pump 22 to block contaminants and serve as a filter and prevent contamination. Furthermore, a valve 25 can also be connected to the pipeline between the liquid storage tank and the water pump 22 to control the flow of the pipeline; for example, the valve 25 can be a butterfly valve, ball valve, or manual valve.

[0101] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0102] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. An evaporative heat exchanger, characterized in that, include: The heat exchange module (10) has a heat exchange surface (101); The liquid supply module (20) is equipped with a liquid supply pipeline (21); The conveying module (30) is provided with a conveyor belt (31) and a transmission mechanism (32) connected to the conveyor belt (31); the conveyor belt (31) is provided with an inlet (311), an outlet (312) and a liquid storage chamber (313), the inlet (311) and the outlet (312) are spaced apart and respectively connected to the liquid storage chamber (313), and the inlet (311) is connected to the liquid supply pipeline (21); A rolling element (40) is provided at the output port (312) of the conveyor belt (31). There is a flow gap between the rolling element (40) and the conveying module (30). The rolling element (40) rolls and contacts the heat exchange surface (101) and carries the heat exchange medium out to the heat exchange surface (101) through the flow gap.

2. The evaporative heat exchanger according to claim 1, characterized in that, The conveyor belt (31) is configured as a ring, and the conveyor belt (31) has an inner ring side and an outer ring side along its own thickness direction; The heat exchange module (10) is provided on the outer ring side, the inner ring side is driven to the transmission mechanism (32), and the rolling element (40) is assembled on the outer ring side; or, the heat exchange module (10) is provided on the inner ring side, the rolling element (40) is assembled on the inner ring side, and the outer ring side is driven to the transmission mechanism (32).

3. The evaporative heat exchanger according to claim 2, characterized in that, The conveying module (30) further includes an assembly housing (33) connected to the conveyor belt (31). The assembly housing (33) is provided with a conveying cavity (331) and a rolling outlet (332) communicating with the conveying cavity (331). The conveying cavity (331) is connected to the output port (312). The rolling element (40) is rotatably assembled on the rolling outlet (332). There is a flow gap between the rolling outlet (332) and the rolling element (40).

4. The evaporative heat exchanger according to claim 3, characterized in that, The heat exchange module (10) is recessed inward on the heat exchange surface (101) and extends to form a flow channel (102). The rolling element (40) rolls and contacts the inner wall of the flow channel (102) and rolls along the extension direction of the flow channel (102).

5. The evaporative heat exchanger according to claim 4, characterized in that, The number of flow channels (102) is set to at least two, and the at least two flow channels (102) are spaced apart. The total area of ​​the projection of the at least two flow channels (102) toward the heat exchange surface (101) along their own concave direction is s, and the area of ​​the heat exchange surface (101) is S, 0.9S≤s≤S.

6. The evaporative heat exchanger according to claim 5, characterized in that, The heat exchange surface (101) is set as a plane, the flow channel (102) extends along a first direction and bends towards a second direction, and the dimension of the bend of the flow channel (102) in the second direction is set as L1; The assembly housing (33) is slidably connected to the output port (312) along the second direction. During the sliding stroke of the assembly housing (33) along the second direction, the assembly housing (33) blocks the output port (312). Along the second direction, the length dimension L2 of the output port (312) where the rolling element (40) corresponding to the flow channel (102) is located is not less than the dimension L1 of the flow channel (102).

7. The evaporative heat exchanger according to claim 6, characterized in that, In at least two of the flow channels (102), each flow channel (102) is in rolling engagement with at least one of the corresponding rolling elements (40); The conveyor belt (31) is provided with one, and the conveyor belt (31) is provided with at least two of the rolling elements (40), and at least two flow channels (102) are rolled in cooperation with the corresponding rolling elements (40) on the conveyor belt (31); or, the conveyor belt (31) is provided with at least two, and each conveyor belt (31) is provided with at least one rolling element (40), and one or at least two adjacent flow channels (102) are rolled in cooperation with the corresponding rolling elements (40) on the conveyor belt (31).

8. The evaporative heat exchanger according to claim 7, characterized in that, Along the second direction, multiple flow channels (102) are arranged at intervals; Any two adjacent flow channels (102) may have their projections overlapping along the first direction, and a plurality of rolling elements (40) may be staggered along the first direction and the second direction; or, any two adjacent flow channels (102) may be spaced apart along the projections of the first direction, and a plurality of rolling elements (40) may be spaced apart at least along the second direction.

9. The evaporative heat exchanger according to claim 7, characterized in that, At least two of the flow channels (102) form a flow channel group, in which at least one of the flow channels (102) is staggered with the other flow channels (102), and at least two of the rolling elements (40) are staggered along the first direction and the second direction.

10. The evaporative heat exchanger according to claim 6, characterized in that, The flow channel (102) has a first flow segment and a second flow segment connected to the first flow segment, the first flow segment and the second flow segment are set at an angle; the included angle between the first flow segment and the second flow segment is defined as θ; the flow channel (102) with θ≥90° is defined as the first flow channel (1021), and the flow channel (1022) with θ<90° is defined as the second flow channel (1022); The heat exchange module (10) has multiple spaced first flow channels (1021) and / or second flow channels (1022) on the heat exchange surface (101); and / or, the heat exchange module (10) has at least two staggered first flow channels (1021) and / or second flow channels (1022) on the heat exchange surface (101).

11. The evaporative heat exchanger according to claim 4, characterized in that, The heat exchange surface (101) is set as a plane or a curved surface, and the heat exchange module (10) is provided with the heat exchange surface (101) on at least one side along a third direction; or, the heat exchange surface (101) is set as a cylindrical surface, the heat exchange module (10) has a heat exchange shaft, and the flow channel (102) extends spirally along the axial direction of the heat exchange shaft; the transmission mechanism (32) drives the conveyor belt (31) to circulate around the axial direction of the heat exchange shaft, and drives the conveyor belt (31) to move along the axial direction of the heat exchange shaft.

12. The evaporative heat exchanger according to any one of claims 1 to 11, characterized in that, The rolling element (40) has an internal cavity, and the surface of the rolling element (40) is provided with a plurality of spaced flow holes (401), each of the flow holes (401) being connected to the cavity.

13. The evaporative heat exchanger according to any one of claims 1 to 11, characterized in that, The liquid supply pipeline (21) includes a manifold (211) and a distributor (212), with the inlet of the distributor (212) connected to the manifold (211). The conveyor belt (31) is provided with a limiting part (314) and a sealing cover (315) movable between the inlet (311) and the limiting part (314); the limiting part (314) is provided in the liquid storage cavity (313), and there is a flow space between the limiting part (314) and the cavity wall of the liquid storage cavity (313) at the edge of the inlet (311); The sealing cap (315) has a first position and a second position; in the first position, the sealing cap (315) abuts against the limiting part (314), and the outlet of the liquid distribution tube (212) is located above the inlet (311) and communicates with the inlet (311); in the second position, the sealing cap (315) blocks the inlet (311); the sealing cap (315) switches between the first position and the second position as the conveyor belt (31) circulates.

14. The evaporative heat exchanger according to any one of claims 1 to 11, characterized in that, The inlet (311) is located away from the transmission mechanism (32); the liquid supply pipeline (21) includes a manifold (211) and a distributor (212); The liquid distribution pipe (212) is connected between the collection pipe (211) and the inlet (311); or, at least two conveyor belts (31) are provided, and at least two conveyor belts (31) are arranged at intervals and move synchronously, with part of the liquid distribution pipe (212) connected between the collection pipe (211) and the corresponding inlet (311), and another part of the liquid distribution pipe (212) connected between the inlets (311) of any two adjacent conveyor belts (31).

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