Dry cooler

Abstract

The utility model discloses a dry cooler, and relates to the technical field of cooling equipment, the dry cooler comprises at least one sub-cooling unit, each sub-cooling unit comprises a fan and two heat exchange parts, the two heat exchange parts are both located on one side of an air inlet of the fan, and the two heat exchange parts are oppositely arranged along the axis of the fan; the distance between the two heat exchange components is gradually increased in the direction from an air inlet of the draught fan to an air outlet of the draught fan. The distance between the ends, facing the draught fan, of the two heat exchange components is larger than the diameter of the draught fan, and a distance exists between the ends, away from the draught fan, of the two heat exchange components. The sub-cooling unit further comprises at least one cooling enhancing component, the at least one heat exchange component corresponds to the cooling enhancing component, the cooling enhancing component is arranged on the air inlet side of the corresponding heat exchange component, and the cooling enhancing component is used for cooling gas flowing to the heat exchange component. The LED lamp is even in air circulation and high in overall heat dissipation efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to cooling equipment technical field, concretely relates to a dry cooler. BACKGROUND

[0002] Dry cooler, namely dry cooler, is a kind of equipment without consuming water in cooling process, by the liquid in heat exchange coil, natural wind outside coil is used to cool the liquid in pipe, reduce the temperature of liquid in pipe, reach the purpose of cooling.

[0003] In prior art, there is the problem of low heat exchange efficiency of dry cooler, so it is necessary to optimize the structure of dry cooler. CONTENT OF UTILITY MODEL

[0004] The utility model aims at solving one of the technical problems in relevant technology to some extent, and for this purpose, the utility model provides a dry cooler.

[0005] To achieve the above purpose, a dry cooler includes at least one sub-cooling unit, each sub-cooling unit includes a fan and two heat exchange components, both heat exchange components are located on the air inlet side of the fan, and both heat exchange components are oppositely arranged along the axis of the fan;Characterized in that, along the direction from the air inlet of the fan to the air outlet of the fan, the spacing between the two heat exchange components gradually increases;The spacing between the two ends of the heat exchange component facing the fan is greater than the diameter of the fan, and there is a spacing between the two ends of the heat exchange component away from the fan.

[0006] The sub-cooling unit further includes at least one cooling enhancement component, at least one heat exchange component corresponds to the cooling enhancement component, the cooling enhancement component is arranged on the air inlet side of the corresponding heat exchange component, and the cooling enhancement component is used to cool the gas flowing to the heat exchange component.

[0007] The application has the following beneficial effects: setting the cooling enhancement component to cool the gas flowing to the heat exchange component, the heat transfer efficiency is improved by 50%-80% compared with the traditional method, the heat exchange efficiency is significantly improved, and the cooling demand of high heat flux density scene is suitable.

[0008] Optionally, the cooling enhancement component includes a spray pipe and at least one spray head connected with the spray pipe, the spray pipe is used to provide cooling liquid to the spray head, and the spray head is used to spray cooling liquid to the corresponding heat exchange component.

[0009] Optionally, the spray pipeline comprises a first pipeline and a second pipeline in communication through a switch valve, the liquid inlet end of the first pipeline is in communication with the switch valve, the other end of the first pipeline is closed, and the first pipeline is connected with at least one spray head; the liquid outlet end of the second pipeline is in communication with the switch valve, and the liquid inlet end of the second pipeline is used to be connected with an external cooling liquid source.

[0010] Optionally, the first pipeline is arranged at the air inlet side of the corresponding heat exchange component, and the first pipeline extends along the length direction of the sub-cooling unit; the first pipeline is connected with a plurality of spray heads, and the plurality of spray heads are arranged at intervals along the length direction of the first pipeline.

[0011] Optionally, the second pipeline comprises a vertical liquid supply pipe and a horizontal liquid supply pipe, the liquid inlet end of the first pipeline is connected with the vertical liquid supply pipe, and the vertical liquid supply pipe extends along the height direction of the sub-cooling unit; the liquid inlet end of the vertical liquid supply pipe is connected with the horizontal liquid supply pipe, the horizontal liquid supply pipe extends along the width direction of the sub-cooling unit, and the liquid inlet end of the horizontal liquid supply pipe is provided with a joint for being connected with an external cooling liquid source.

[0012] Optionally, the joint is a tee joint, and the sub-cooling unit is provided with two cooling enhancement components, and the liquid inlet ends of the horizontal liquid supply pipes of the two cooling enhancement components are connected with an external cooling liquid source through a tee joint.

[0013] Optionally, the sub-cooling unit further comprises a mounting frame, the fan is arranged at the top of the mounting frame, and the heat exchange component and the cooling enhancement component are arranged in the interior of the mounting frame.

[0014] Optionally, the mounting frame comprises a top plate, a bottom plate, a bottom frame, two side plates and two support frames, the two support frames are arranged along the width direction of the sub-cooling unit, the two support frames are respectively provided with the corresponding heat exchange component and cooling enhancement component; the top plate is arranged between the tops of the two support frames, and the fan is mounted on the top plate; the bottom frame is connected to the bottoms of the two support frames, the bottom plate is arranged on the bottom frame and located between the bottoms of the two heat exchange components; and the side plates are connected between the top plate and the bottom plate.

[0015] Optionally, the support frame comprises a support inclined rod and a support vertical rod connected with each other, the side edge of the heat exchange component is arranged on the support inclined rod, the top of the support inclined rod is fixedly connected with the top of the support vertical rod, and the support vertical rod extends along the height direction of the sub-cooling unit.

[0016] Optionally, the dry cooler further comprises a box body, a plurality of sub-cooling units are arranged in the box body, and the plurality of sub-cooling units are arranged along the length direction of the box body.

[0017] These features and advantages of the present application will be described in detail in the following detailed description taken in conjunction with the accompanying drawings. The best mode or preferred embodiment of the present application will be described in detail in conjunction with the accompanying drawings, but is not a limitation on the technical scheme of the present application. In addition, these features, elements and components appearing in each of the following text and drawings are multiple, and different symbols or numbers are marked for convenience of representation, but all represent the same or similar structure or function components. BRIEF DESCRIPTION OF DRAWINGS

[0018] The present application will be further described below in conjunction with the accompanying drawings:

[0019] Figure 1 It is an internal structure schematic diagram of the present application.

[0020] Figure 2 It is a structure schematic diagram of the present application.

[0021] Figure 3a It is a velocity field schematic diagram of the existing dry cooler along the vertical plane of the front face of the fan shaft.

[0022] Figure 3b It is a velocity field schematic diagram of the present application along the vertical plane of the front face of the fan shaft.

[0023] Figure 4a It is a velocity field schematic diagram of the existing dry cooler along the vertical plane of the side face of the fan shaft.

[0024] Figure 4b It is a velocity field schematic diagram of the present application along the vertical plane of the side face of the fan shaft.

[0025] Figure 5 It is a temperature uniformity graph of the present application with the bottom spacing unchanged and the temperature uniformity.

[0026] Figure 6 It is a cloud gradient graph of the present application with the spacing d1 and the angle a on the temperature.

[0027] 1, fan; 2, heat exchange component; 3, mounting frame; 31, support inclined rod; 32, support vertical rod; 4, top plate; 5, side baffle; 6, bottom plate; 7, cooling enhancement component; 71, spray head; 72, water supply pipe. DETAILED DESCRIPTION

[0028] The embodiments of the present application will be described in detail below, and the examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. Based on the embodiments in the embodiments, it is intended to explain the present application, and cannot be understood as a limitation on the present application.

[0029] Reference in this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the disclosure. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment.

[0030] It should be noted that the numerical range represented by [A, B] in the utility model represents that the numerical range is from A value to B value, and includes A value and B value. The numerical range represented by (A, B) in the utility model represents that the numerical range is from A value to B value, and does not include A value and B value. The numerical range represented by [A, B) in the utility model represents that the numerical range is from A value to B value, and includes A value, but does not include B value. The numerical range represented by (A, B] in the utility model represents that the numerical range is from A value to B value, and includes B value, but does not include A value.

[0031] In the related art, the heat exchange efficiency of the dry cooler is low, and as the air temperature rises, the temperature difference with the fluid in the pipe decreases, the power of heat transfer becomes smaller, and the speed and efficiency of heat transfer will be reduced. For example, in hot summer, the ambient air temperature may be close to or even higher than the temperature of some fluid that needs to be cooled, at this time, the heat exchange efficiency of the dry cooler will decrease significantly, resulting in poor cooling effect. High temperature will increase the viscosity of air, which will increase the flow resistance of air flowing through the finned tube and other heat exchange components of the dry cooler. In order to ensure a certain air flow, the power of the fan needs to be increased to overcome the resistance, at the same time, the increased viscosity will also thicken the boundary layer between the air and the heat exchange surface, increase the thermal resistance, and is not conducive to heat transfer, thereby reducing the heat exchange efficiency.

[0032] Secondly, in the operation of the dry cooler, the air flow is not uniform, which makes some areas have good heat dissipation, and some areas have poor heat dissipation, reducing the overall heat dissipation efficiency, and also causing local overheating. Specifically, the velocity field of the existing dry cooler along the vertical plane of the front face of the fan shaft is as shown in Figure 3a Due to the small spacing between the top of the two heat exchange components, and the small angle between the heat exchange component and the suction direction of the fan, the air flow rate at the bottom of the heat exchanger is low, and the flow rate in the small area at the top is high, the flow rate distribution is uneven. The velocity field of the existing dry cooler along the vertical plane of the side surface of the fan shaft is as shown in Figure 4a Due to the fact that the fan is not in the center position of the dry cooler (in this example, the fan is in the upper right position of the dry cooler), the air flow in the heat exchanger angle flows obliquely, and flows horizontally in the space at the right side inlet manifold, and is then sucked by the fan. This phenomenon is more obvious at the bottom of the dry cooler, and such flow causes poor heat exchange at the lower left corner of the heat exchanger.

[0033] Therefore, the embodiment of the utility model provides a kind of dry cooler, including at least one sub cooling unit, each the sub cooling unit includes fan 1 and two heat exchange components 2, two heat exchange components 2 are located fan 1 air inlet side, and two heat exchange components 2 are oppositely arranged along the axis of the fan 1;Along the direction of fan 1 air inlet to the air outlet of the fan, the spacing between two heat exchange components 2 gradually increases setting;The spacing d1 between the end of two heat exchange components 2 towards fan 1 is greater than the diameter of the fan 1, and there is spacing d2 between the end of two heat exchange components 2 away from fan 1;

[0034] The sub cooling unit further includes two cooling enhancement components 7, the two cooling enhancement components 7 are respectively arranged on the side of the two heat exchange components 2 away from each other, and the cooling enhancement component 7 is used to cool the gas flowing to the heat exchange component 2.

[0035] The cooling enhancement component includes a spray pipeline 72 and at least one spray head 71 connected with the spray pipeline 72, the spray pipeline 72 is used to provide cooling liquid to the spray head 71, and the spray head 71 is used to spray cooling liquid to the corresponding heat exchange component 2.

[0036] In some embodiments, the spray pipeline 72 includes a first pipeline and a second pipeline communicated by a switch valve, the liquid inlet end of the first pipeline is communicated with the switch valve, the other end of the first pipeline is closed, and the first pipeline is connected with at least one spray head 71; the liquid outlet end of the second pipeline is communicated with the switch valve, and the liquid inlet end of the second pipeline is used to be connected with an external cooling liquid source.

[0037] In some embodiments, the first pipeline is arranged on the air inlet side of the corresponding heat exchange component 2, and the first pipeline extends along the length direction of the sub cooling unit; the first pipeline is connected with a plurality of spray heads 71, and the plurality of spray heads 71 are arranged at intervals along the length direction of the first pipeline. The spray head 71 can form a uniform liquid film or atomized liquid droplets, further cool the gas flowing to the heat exchange component 2, significantly improve the heat exchange efficiency of the dry cooler, and be suitable for the cooling demand of high heat flux density scene.

[0038] In some embodiments, the second pipeline includes a vertical liquid supply pipe and a horizontal liquid supply pipe, the liquid inlet end of the first pipeline is connected with the vertical liquid supply pipe, and the vertical liquid supply pipe extends along the height direction of the sub cooling unit; the liquid inlet end of the vertical liquid supply pipe is connected with the horizontal liquid supply pipe, the horizontal liquid supply pipe extends along the width direction of the sub cooling unit, and the liquid inlet end of the horizontal liquid supply pipe is provided with a joint for connecting with an external cooling liquid source.

[0039] In some embodiments, the joint is a tee joint, and the cooling enhancement component 7 is provided with two, and the liquid inlet ends of the horizontal liquid supply pipes of the two cooling enhancement components 7 are connected to an external cooling liquid source through a tee joint.

[0040] Secondly, the spacing d1 between the two ends of the two heat exchange components 2 towards the fan 1, the spacing d2 between the two ends of the two heat exchange components 2 away from the fan 1, and the angle a between the two heat exchange components 2 are described. In the existing dry cooler structure, the angle a between the two heat exchange components is 40°, d1 is 697 mm, d2 is 85 mm, the diameter of the fan is 700 mm, and the fan is not located at the top center of the dry cooler. In this embodiment, a is 50°, d1 is 1086 mm, d2 is 200 mm, the diameter of the fan is 700 mm, and the fan 1 is located at the top center of the dry cooler.

[0041] Comparison Figure 3a and Figure 3b It can be seen that, in this embodiment, the spacing d1 between the two ends of the two heat exchange components 2 towards the fan 1 is greater than the diameter of the fan 1, the width of the top of the heat exchange component 2 should be greater than the width of the inlet of the fan 1, and the speed dead zone formed at the position adjacent to the top of the heat exchange component 2 and the inlet of the fan 1 is reduced. There is a spacing d2 between the two ends of the two heat exchange components 2 away from the fan 1, the angle between the two heat exchange components 2 is increased, and the air flow uniformity on the plane of the heat exchange component is better. The spacing d2 between the bottoms of the heat exchange components can be appropriately expanded, such as to 200 mm, but the influence of the increase in the width of the top on the arrangement space under the condition that the angle a is unchanged also needs to be considered.

[0042] Comparison Figure 4a and Figure 4b It can be seen that, in this embodiment, the two heat exchange components 2 are arranged relative to the axis of the fan 1, and the air flow is relatively more uniform. Although there is still high temperature at the bottoms of the two heat exchange components, the overall temperature is lower, and the temperature distribution gradient is smaller.

[0043] In one example, the spacing d1 between the two ends of the two heat exchange components 2 close to the fan 1 is at least about 150 mm-200 mm greater than the diameter of the fan 1.

[0044] In one example, the spacing d2 between the two ends of the two heat exchange components 2 away from the fan 1 is not more than 510 mm.

[0045] Preferably, the spacing d2 between the two ends of the two heat exchange components 2 away from the fan 1 is within the range of [200 mm, 500 mm], thereby facilitating the uniformity of the air flow.

[0046] In practical applications, the distance between the tops of the two heat exchange components can be determined first based on the fan size. Then, with the distance between the tops of the two heat exchange components remaining constant, [the following steps can be taken]. Figure 5 As can be seen, Region 1 has a structure with a small gap and a large angle at the bottom. Due to the close proximity of the two heat exchangers at the bottom, the heat density in this area is high, and the small flow channel causes localized high temperatures. Increasing the gap and decreasing the angle significantly reduces the temperature. In regions with a gap of 200-500mm, such as Region 3, the lowest temperature occurs at a gap of approximately 350mm and an angle of 48°. However, overall, changes in the angle have little impact on the maximum temperature in this region. Continuing to increase the gap to 650mm, with an angle of 32°, the temperature begins to rise. At this point, a flow dead zone appears at the bottom, and the distance between the fan inlet and the bottom area of ​​the heat exchanger increases, affecting heat exchange in the bottom area of ​​the heat exchange components.

[0047] In addition, such as Figure 6 As shown, when the included angle α between the two heat exchange components remains constant, increasing the bottom spacing d2 and the top spacing d1 of the two heat exchange components reduces the maximum temperature. When the bottom spacing d2 of the two heat exchange components increases from 85mm to 180mm, the temperature drop is significant. As the spacing d2 continues to increase, this temperature drop gradually decreases. Comparing different included angles α, at larger included angles, the temperature drop effect after increasing the bottom spacing d2 is less than that at smaller included angles, and the temperature drop trend also gradually decreases.

[0048] In one example, the angle between the axis of the fan 1 and the plane where the heat exchange component 2 is located is in the range of [20°, 26°].

[0049] Preferably, the included angle between the two heat exchange components 2 is within the range of [42°, 50°]. The included angle of the heat exchanger affects the flow distribution in the vertical direction of the heat exchanger; within the above-mentioned angle range, the larger the angle, the better the flow uniformity.

[0050] In addition, such as Figure 6 As shown, when the bottom spacing d2 remains constant, increasing the included angle α reduces the maximum temperature. The temperature drop is significant when the included angle α increases from 40° to 48°, but this cooling trend gradually decreases as the included angle α continues to increase. Comparing different spacings d2, the cooling effect of increasing the included angle α is less pronounced with a larger spacing d2 than with a smaller spacing d2, and the cooling trend also gradually decreases. With increasing d2 and α, the cooling effect gradually decreases. Increasing the spacing d2 and included angle α leads to increased space and material costs without a significant cooling effect.

[0051] In some embodiments, the sub-cooling unit further includes a mounting frame 3, the fan is disposed on top of the mounting frame 3, and the heat exchange component 2 and the cooling enhancement component 7 are disposed inside the mounting frame 3.

[0052] In some embodiments, the mounting frame 3 comprises a top plate 4, a bottom plate 6, a bottom frame, two side plates 5 and two support frames, the two support frames are arranged along the width direction of the sub-cooling unit, and each of the two support frames is provided with a corresponding heat exchange component 2 and a cooling enhancement component 7; the top plate 4 is arranged between the top portions of the two support frames, and the fan 1 is mounted on the top plate 4; the bottom frame is connected to the bottom portions of the two support frames, and the bottom plate 6 is arranged on the bottom frame and located between the bottom portions of the two heat exchange components 2; and the side plates 5 are connected between the top plate 4 and the bottom plate 6.

[0053] In some embodiments, the support frame comprises a support inclined rod 31 and a support vertical rod 32 connected to each other, the side edges of the heat exchange component 2 are arranged on the support inclined rod 31, the top portion of the support inclined rod 31 is fixedly connected to the top portion of the support vertical rod 32, and the support vertical rod 32 extends along the height direction of the sub-cooling unit to form a triangular support for the heat exchange component 2.

[0054] In some embodiments, the fan 1 is located at the center position of the top plate 4, the air inlet of the fan 1 is arranged downward, and the air outlet of the fan 1 is arranged upward; and the two heat exchange components 2 are symmetrically arranged on the two sides of the mounting frame 3 relative to the axis of the fan 1, so that the air flow is relatively more uniform.

[0055] In some embodiments, the heat exchange component is a heat exchange coil or a plurality of micro-channel heat exchangers, air flows through the micro-channel heat exchanger under the action of the fan to realize heat exchange, so as to achieve the purpose of refrigeration.

[0056] The design method of the dry cooler provided by the utility model mainly comprises the following steps: 1, the fan should be arranged at the projection center of the sub-cooling unit; 2, after the diameter of the fan is determined, the spacing d1 between the two heat exchange components 2 close to one end of the fan 1 is at least greater than the diameter of the fan 1 by about 150mm-200mm; 3, after d1 is determined, the included angle a between the two heat exchange components 2 is determined to be within the range of 42°-50°, and the structure of the mounting frame is designed in this way; 4, after the included angle a and the structure of the mounting frame are determined, the spacing d2 between the two heat exchange components 2 away from one end of the fan 1 is checked again, d2 should be at the level of 250mm or above, the spacing is 250mm after the included angle is determined under the size of the heat exchanger, and if a new heat exchanger is designed, the included angle or the height of the external structure should be adjusted slightly to make the bottom spacing be within a reasonable range.

[0057] In some other embodiments, the dry cooler further comprises a box body, and a plurality of sub-cooling units are arranged in the box body and arranged along the length direction of the box body. For space-limited places such as data center rooms, small-scale energy storage power stations and the like, a plurality of sub-dry cooler units are integrated in a box body, so that the cooling equipment can be arranged centrally, the space occupation is reduced, and the space utilization is improved. The plurality of sub-dry cooler units form an integral module, which is more convenient to transport, can be hoisted and carried integrally, and after arriving at the installation site, only simple external pipeline and line connection is needed, so that the installation and debugging can be quickly completed, and the project construction period is shortened.

[0058] The dry cooler has the following advantages: (1) the spacing between the two heat exchange components towards one end of the fan is greater than the diameter of the fan, so that the speed dead zone formed by the dry cooler at the variable-diameter position (the position adjacent to the heat exchange component of the fan air inlet) is reduced, and the air flowability is better; (2) spacing exists between the two heat exchange components away from one end of the fan, so that the local high temperature formed at the end of the heat exchange component away from the fan is reduced, and the temperature uniformity is better; (3) the cooling enhancement component is arranged to cool the gas flowing towards the heat exchange component, so that the heat exchange efficiency is significantly improved, and the cooling demand of the high heat flux density scene is suitable.

[0059] The above is only a specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, and those skilled in the art should understand that the utility model includes but is not limited to the contents described in the drawings and the above specific embodiment. Any modification not deviating from the function and structural principle of the utility model will be included in the scope of claims.

Claims

1. A dry cooler comprising at least one sub-cooling unit, each of the sub-cooling units comprising a fan (1) and two heat exchange components (2), both of the heat exchange components (2) being located on the air inlet side of the fan (1) and oppositely arranged along the axis of the fan (1); characterized in that, The interval between the two heat exchange components (2) gradually increases along the direction from the air inlet of the fan (1) to the air outlet of the fan; the interval between the two heat exchange components (2) at the end close to the fan (1) is greater than the diameter of the fan (1), and there is an interval between the two heat exchange components (2) at the end away from the fan (1); The sub-cooling unit further comprises at least one cooling enhancement component (7), and each heat exchange component (2) corresponds to a cooling enhancement component (7); the cooling enhancement component (7) is arranged on the air inlet side of the corresponding heat exchange component (2), and is used for cooling the gas flowing to the heat exchange component (2).

2. The dry cooler according to claim 1, characterized in that The cooling enhancement component comprises a spray pipeline (72) and at least one spray head (71) connected with the spray pipeline (72); the spray pipeline (72) is used for supplying cooling liquid to the spray head (71), and the spray head (71) is used for spraying cooling liquid to the corresponding heat exchange component (2).

3. The dry cooler according to claim 2, characterized in that The spray pipeline (72) comprises a first pipeline and a second pipeline connected through a switch valve; the liquid inlet end of the first pipeline is communicated with the switch valve, and the other end of the first pipeline is closed; the first pipeline is connected with at least one spray head (71); The liquid outlet end of the second pipeline is communicated with the switch valve, and the liquid inlet end of the second pipeline is used for connecting with an external cooling liquid source.

4. The dry cooler of claim 3, wherein The first pipeline is arranged on the air inlet side of the corresponding heat exchange component (2) and extends along the length direction of the sub-cooling unit; the first pipeline is connected with a plurality of spray heads (71), and the plurality of spray heads (71) are arranged at intervals along the length direction of the first pipeline.

5. The dry cooler of claim 3, wherein The second pipeline comprises a vertical liquid supply pipe and a horizontal liquid supply pipe; the liquid inlet end of the first pipeline is connected with the vertical liquid supply pipe, and the vertical liquid supply pipe extends along the height direction of the sub-cooling unit; the liquid inlet end of the vertical liquid supply pipe is connected with the horizontal liquid supply pipe, and the horizontal liquid supply pipe extends along the width direction of the sub-cooling unit; the liquid inlet end of the horizontal liquid supply pipe is provided with a joint for connecting with an external cooling liquid source.

6. The dry cooler of claim 5, wherein, The joint is a three-way joint, and the cooling enhancement component (7) is provided with two; the liquid inlet ends of the horizontal liquid supply pipes of the two cooling enhancement components (7) are connected with an external cooling liquid source through a three-way joint.

7. The dry cooler according to any one of claims 1-6, characterized in that, The sub-cooling unit further comprises a mounting frame (3), and the fan is arranged on the top of the mounting frame (3); the heat exchange components (2) and the cooling enhancement components (7) are arranged in the interior of the mounting frame (3).

8. The dry cooler of claim 7, wherein, The mounting frame (3) comprises a top plate (4), a bottom plate (6), a bottom frame, two side plates (5) and two support frames, the two support frames are arranged along the width direction of the sub-cooling unit, and the two support frames are respectively provided with the heat exchange component (2) and the cooling enhancement component (7); the top portions of the two support frames are provided with the top plate (4), the fan (1) is mounted on the top plate (4); the bottom portions of the two support frames are connected with the bottom frame, and the bottom frame is provided with the bottom plate (6) at the position between the bottom portions of the two heat exchange components (2); the side plates (5) are connected between the top plate (4) and the bottom plate (6).

9. The dry cooler of claim 8, wherein, The support frame comprises a support inclined rod (31) and a support vertical rod (32) connected with each other, the side edge of the heat exchange component (2) is arranged on the support inclined rod (31), the top portion of the support inclined rod (31) is fixedly connected with the top portion of the support vertical rod (32), and the support vertical rod (32) extends along the height direction of the sub-cooling unit.

10. The dry cooler of claim 7, wherein, The dry cooler further comprises a box body, a plurality of sub-cooling units are arranged in the box body, and the plurality of sub-cooling units are arranged along the length direction of the box body.

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