Counterflow high-efficiency evaporative air cooler

Abstract

The present disclosure relates to the technical field of evaporative air cooling devices, and one embodiment of the present disclosure provides a counter-flow type high-efficiency evaporative air cooler, which comprises: a supercooling pipe, opposite ends of the supercooling pipe are provided with access ports, a supercooling circulation assembly is arranged inside the supercooling pipe, and a constant-temperature protection assembly is arranged outside the supercooling pipe; the supercooling circulation assembly comprises a circulation pipe, and the circulation pipe and the access pipe are divided into two flow guide cavities by a partition plate. Through the above technical solution, the technical problem that the early evaporative cooling equipment in the prior art has deficiencies in aspects such as structural design and heat exchange mechanism is solved, for example, some evaporative coolers, although adopting a counter-flow structure, the layout of heat exchange pipes and the design of a circulation system are poor, resulting in large gas resistance and low heat exchange efficiency, in the high-temperature season, the temperature of the external environment rises, the temperature of the cooling medium (such as water) rises accordingly, the temperature difference between the cooling medium and the high-temperature fluid decreases, the heat transfer driving force is insufficient, and the cooling effect is further weakened.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the field of evaporative air-cooling devices, and more specifically, to a counter-flow high-efficiency evaporative air-cooler. Background Technology

[0002] In industrial production and many other fields, heat management is of paramount importance. Traditional cooling equipment, such as spray-type pipe coolers and shell-and-tube coolers, has limitations in heat exchange efficiency and energy utilization, making it difficult to meet the growing demand for efficient cooling. For example, in industries such as petrochemicals and refrigeration and air conditioning, large equipment generates a large amount of heat during operation. Conventional cooling methods cannot remove the heat quickly and efficiently, resulting in excessively high operating temperatures. This not only reduces equipment performance and lifespan but may also cause safety hazards.

[0003] With the development of science and technology and industrial upgrading, the demand for efficient cooling equipment has become increasingly strong, and evaporative cooling technology has emerged. It cools high-temperature fluids by removing condensation heat through water evaporation and forced air circulation. However, early evaporative cooling equipment had shortcomings in structural design and heat exchange mechanism. For example, some evaporative coolers, although adopting a counter-flow structure, had poor heat exchange tube layout and circulation system design, resulting in high gas resistance and low heat exchange efficiency. In high-temperature seasons, the ambient temperature rises, and the temperature of the cooling medium (such as water) rises accordingly. The temperature difference between the medium and the high-temperature fluid decreases, and the driving force for heat transfer is insufficient, further weakening the cooling effect.

[0004] In addition, existing cooling equipment is also lacking in temperature stability control. When operating conditions and ambient temperature fluctuate greatly, it is difficult to maintain a constant internal temperature. For example, in areas with large day-night temperature differences, when industrial equipment is running at night, the ambient temperature drops suddenly, and traditional cooling equipment cannot adjust in time, which can easily cause the equipment to overcool and affect its normal operation. Based on these background problems, the development of a counter-flow high-efficiency evaporative air cooler is of great practical significance. It aims to break through the bottleneck of traditional cooling equipment and meet the urgent needs of various industries for efficient and stable cooling. Utility Model Content

[0005] To overcome the above-mentioned defects, the embodiments of this disclosure provide a counter-flow high-efficiency evaporative air cooler, which solves the shortcomings of early evaporative cooling equipment in the prior art in terms of structural design and heat exchange mechanism. For example, some evaporative coolers, although adopting a counter-flow structure, have poor heat exchange tube layout and circulation system design, resulting in high gas resistance and low heat exchange efficiency. In high-temperature seasons, the ambient temperature rises, the temperature of the cooling medium (such as water) rises accordingly, the temperature difference between the medium and the high-temperature fluid decreases, the heat transfer driving force is insufficient, and the cooling effect is further weakened.

[0006] According to one aspect, at least one embodiment of the present disclosure provides a counter-flow high-efficiency evaporative air cooler, comprising: Subcooling pipe, wherein connection ports are provided at opposite ends of the subcooling pipe; A subcooling circulation assembly, wherein the subcooling circulation assembly is disposed inside the subcooling tube; A constant temperature protection component is disposed on the outside of the subcooling tube; The subcooling circulation assembly includes a circulation pipe inserted into the subcooling pipe, with one end of the circulation pipe extending out of the subcooling pipe. An annular cover is provided at the end of the circulation pipe, and a circulation chamber is provided inside the annular cover. There are several annular covers, which are equidistantly arranged inside the subcooling pipe. A connecting pipe is sealed between the multiple circulation chambers. A dividing plate is provided inside both the circulation pipe and the connecting pipe, and the circulation pipe and the connecting pipe are divided into two flow guiding chambers by the dividing plate.

[0007] As a further technical solution, conical covers are respectively provided at opposite ends of the dividing plate. Water passage holes are opened on the conical covers, and expansion holes are opened on the water passage holes. The conical apex directions of the two conical covers are opposite.

[0008] As a further technical solution, the constant temperature protection component includes a constant temperature outer cover, which is fitted onto the subcooling tube. The constant temperature outer cover has a constant temperature cavity inside, and a constant temperature plate is provided inside the constant temperature cavity. The constant temperature plate has a circular structure and is fitted onto the subcooling tube.

[0009] As a further technical solution, the constant temperature plate is made of aluminum oxide with a melting point of 2054℃, and the cross-section of the constant temperature plate is wavy.

[0010] As a further technical solution, the side wall of the connection port is provided with a plug groove, the side wall of the plug groove is provided with a connecting ring, and the connecting ring is provided with a connecting thread.

[0011] As a further technical solution, the circulation pipe has a J-shaped elbow structure, with the upper end of the circulation pipe extending out of the subcooling pipe.

[0012] As a further technical solution, a guide pipe is provided at one end of the circulation pipe extending from the subcooling pipe, a pump pipe is provided at the end of the guide pipe, a circulation water pump is provided on the pump pipe, the circulation water pump is installed on the outer wall of the subcooling pipe, and a pump platform is provided between the circulation water pump and the subcooling pipe.

[0013] As a further technical solution, a liquid passage is formed at the center of the annular cover, and the diameter of the liquid passage matches that of the connection port.

[0014] The beneficial effects of the embodiments disclosed herein are as follows: 1. In this disclosure, the hot and cold fluids in the subcooling pipe and the circulation pipe flow in opposite directions, forming a large temperature difference driving force. Compared with the co-flow structure, the heat transfer coefficient can be improved. The partition plate in the circulation pipe divides the flow channel into two flow guiding chambers. With the design of the conical cover, water passage hole and expansion hole, the circulating liquid continuously changes direction and generates turbulence during the flow, breaking the boundary layer resistance, increasing the contact area with the inner wall of the subcooling pipe, and enhancing the heat transfer efficiency.

[0015] 2. In this disclosure, the circulation channel formed by multiple annular covers and connecting pipes is arranged in a tortuous layout, which increases the flow path length of the circulating liquid in the subcooling pipe and prolongs the residence time, ensuring that the high-temperature fluid and the circulating liquid can fully exchange heat, and the subcooling effect is more significant. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0017] Figure 1 This is a schematic diagram of a structure in one embodiment of the present disclosure; Figure 2 This is a cross-sectional view of the subcooled tube disclosed herein; Figure 3 This is an isometric view of the circulation tube in this disclosure; Figure 4 This is an isometric view of the segmented plate disclosed herein; Figure 5 Appendix to this disclosure Figure 2 Enlarged view of part A; In the diagram: 1. Subcooling pipe; 2. Connecting port; 3. Subcooling circulation assembly; 3-1. Circulation pipe; 3-2. Annular cover; 3-3. Connecting pipe; 3-4. Dividing plate; 3-5. Flow guide cavity; 3-6. Conical cover; 3-7. Water passage hole; 3-8. Expansion hole; 3-9. Circulation cavity; 4. Thermostatic protection assembly; 4-1. Thermostatic outer cover; 4-2. Thermostatic cavity; 4-3. Thermostatic plate; 4-4. Insertion groove; 4-5. Connecting ring; 4-6. Connecting thread; 5. Flow guide pipe; 6. Pump pipe; 7. Circulating water pump; 8. Pump platform; 9. Liquid passage port. Detailed Implementation

[0018] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0019] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0020] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0021] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature 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 includes the first feature 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.

[0022] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0023] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] like Figures 1-5 As shown, a counter-current high-efficiency evaporative air cooler of this disclosure is illustrated, comprising: Subcooling pipe 1, with connection ports 2 provided at opposite ends of subcooling pipe 1; Subcooling circulation component 3 is disposed inside subcooling pipe 1; Thermostatic protection component 4 is located on the outside of subcooling pipe 1; The subcooling circulation assembly 3 includes a circulation pipe 3-1, which is inserted into the subcooling pipe 1. One end of the circulation pipe 3-1 extends out of the subcooling pipe 1. An annular cover 3-2 is provided at the end of the circulation pipe 3-1. A circulation chamber 3-9 is provided inside the annular cover 3-2. There are several annular covers 3-2, which are equidistantly arranged inside the subcooling pipe 1. A connecting pipe 3-3 is sealed between the multiple circulation chambers 3-9. A dividing plate 3-4 is provided inside both the circulation pipe 3-1 and the connecting pipe 3-3. The circulation pipe 3-1 and the connecting pipe 3-3 are divided into two flow guiding chambers 3-5 by the dividing plate 3-4.

[0025] The constant temperature protection component 4 includes a constant temperature outer cover 4-1, which is fitted onto the subcooling tube 1. The constant temperature outer cover 4-1 has a constant temperature cavity 4-2 inside, and a constant temperature plate 4-3 is installed inside the constant temperature cavity 4-2. The constant temperature plate 4-3 has a circular structure and is fitted onto the subcooling tube 1.

[0026] In some examples, before installing the subcooling pipe 1, it is necessary to check for damage and ensure that its interior is clean and free of impurities. Simultaneously, based on the actual installation environment, the installation location and routing of the subcooling pipe 1 are determined to ensure that its two ends (connections 2) can be easily connected to other pipes or equipment, forming a J-shape. A U-shaped elbow-structured circulation pipe 3-1 is inserted into the subcooling pipe 1, ensuring that the upper end of the circulation pipe 3-1 extends beyond the subcooling pipe 1. Due to the special shape of the circulation pipe 3-1, it can effectively guide the flow direction of the circulating liquid and improve circulation efficiency. During insertion, care should be taken to avoid collision between the circulation pipe 3-1 and the inner wall of the subcooling pipe 1, which could cause damage. Several annular covers 3-2 are placed equidistantly inside the subcooling pipe 1. The end of the circulation pipe 3-1 is connected to the annular cover 3-2, ensuring a tight connection to prevent liquid leakage. The circulation chambers 3-9 of multiple annular covers 3-2 are sealed with connecting pipes 3-3, again ensuring a tight connection. A guide pipe 5 is connected to the end of the circulation pipe 3-1 extending beyond the subcooling pipe 1. The end of the guide pipe 5 is connected to a pump pipe 6. A circulating water pump 7 is installed on the pump pipe 6. The circulating water pump 7 is placed in... The outer wall of the subcooling pipe 1 is fixed by the pump platform 8 to ensure the stable operation of the circulating water pump 7. The circulating water pump 7 is used to drive the circulating liquid to flow in the circulating pipe 3-1 to form a circulating cooling system. The constant temperature cover 4-1 is fitted onto the subcooling pipe 1 to ensure that the constant temperature cover 4-1 and the subcooling pipe 1 are tightly fitted without gaps. The constant temperature cavity 4-2 inside the constant temperature cover 4-1 surrounds the subcooling pipe 1 to provide constant temperature protection for the subcooling pipe 1. The liquid that needs to be cooled or subcooled flows into the subcooling pipe 1 from the connection port 2 at one end of the subcooling pipe 1. In the subcooling pipe 1, it exchanges heat with the circulating liquid in the circulating pipe 3-1. Since the temperature of the circulating liquid is low, the temperature of the liquid in the subcooling pipe 1 can be reduced to achieve the subcooling effect. The subcooled liquid flows out from the connection port 2 at the other end of the subcooling pipe 1 and enters the subsequent process flow. Throughout the operation, the thermostatic protection component 4 plays a role. When the ambient temperature changes, the thermostatic plate 4-3 can absorb or release heat. Through the heat transfer between the thermostatic chamber 4-2 and the subcooling tube 1, the temperature of the subcooling tube 1 is kept as stable as possible. If the temperature is too high, the thermostatic plate 4-3 absorbs heat to slow down the rate at which the temperature of the subcooling tube 1 rises. If the temperature is too low, the thermostatic plate 4-3 releases the stored heat to prevent the subcooling tube 1 from becoming too cold, which could affect the performance of the equipment or cause the liquid to solidify.

[0027] like Figures 1-5 As shown in the figure, this embodiment proposes that the two ends of the dividing plate 3-4 are respectively provided with conical covers 3-6, the conical covers 3-6 have water passage holes 3-7, the water passage holes 3-7 have expansion holes 3-8, and the conical tips of the two conical covers 3-6 are in opposite directions.

[0028] In some examples, during this process, due to the design of the conical shroud 3-6, the liquid continuously changes its flow direction within the guide cavity 3-5, enhancing the heat exchange effect with the inner wall of the circulation pipe 3-1 and the surrounding environment. The dividing plate 3-4 inside the circulation pipe 3-1 and the connecting pipe 3-3 divides it into two guide cavities 3-5. Water passage holes 3-7 and expansion holes 3-8 are opened on the conical shrouds 3-6 at opposite ends of the dividing plate 3-4, and the conical apex angles of the two conical shrouds 3-6 are in opposite directions. This design helps to guide the flow of liquid within the guide cavity 3-5, enhancing the mixing and heat exchange effect of the liquid.

[0029] For example, such as Figure 2 As shown, the thermostat 4-3 is made of aluminum oxide with a melting point of 2054℃, and the cross-section of the thermostat 4-3 is wavy.

[0030] In some examples, a ring-shaped thermostat 4-3 is fitted onto the subcooling tube 1 and placed inside the thermostat chamber 4-2. The thermostat 4-3 is made of alumina with a melting point of 2054℃ and has a wavy cross-section. This shape can increase the contact area between the thermostat 4-3 and the subcooling tube 1 and the air or other media in the thermostat chamber 4-2, thereby improving the thermostat effect. The thermostat 4-3 can remain stable within a certain temperature range. When the ambient temperature changes, it helps the subcooling tube 1 maintain a relatively stable temperature environment through its own heat transfer characteristics.

[0031] For example, such as Figure 5 As shown, the side wall of the connection port 2 is provided with a plug groove 4-4, the side wall of the plug groove 4-4 is provided with a connecting ring 4-5, and the connecting ring 4-5 is provided with a connecting thread 4-6.

[0032] In some examples, the side wall of the connection port 2 is provided with a plug groove 4-4, into which a matching pipe or connector can be inserted. The connecting thread 4-6 on the connecting ring 4-5 is used to fix the connection to the external pipe by threaded connection, ensuring the sealing of the connection and preventing liquid leakage. During the connection process, a sealing gasket or sealant can be used to further enhance the sealing effect.

[0033] For example, such as Figure 2 As shown, the circulation pipe 3-1 has a J-shaped elbow structure. The upper end of the circulation pipe 3-1 extends out of the subcooling pipe 1. A guide pipe 5 is provided at one end of the circulation pipe 3-1 extending out of the subcooling pipe 1. A pump pipe 6 is provided at the end of the guide pipe 5. A circulating water pump 7 is provided on the pump pipe 6. The circulating water pump 7 is installed on the outer wall of the subcooling pipe 1. A pump platform 8 is provided between the circulating water pump 7 and the subcooling pipe 1.

[0034] In some examples, the circulating water pump 7 is started, and the circulating liquid enters from one end of the circulating pipe 3-1 that extends out of the subcooling pipe 1. It is pumped into the circulating pipe 3-1 through the guide pipe 5 and the pump pipe 6. The liquid flows in the circulating pipe 3-1, passes through the guide cavity 3-5 divided by the dividing plate 3-4, and then enters the connecting pipe 3-3 through the annular cover 3-2. It circulates in the circulation channel composed of multiple annular covers 3-2 and connecting pipes 3-3.

[0035] For example, such as Figure 2 As shown, a liquid passage 9 is formed at the center of the annular cover 3-2, and the diameter of the liquid passage 9 matches that of the connection port 2.

[0036] In some examples, the diameter of the liquid passage 9 at the center of the annular cover 3-2 matches that of the connecting port 2 to ensure that the liquid can pass through smoothly.

[0037] In operation, the counter-flow high-efficiency evaporative air cooler is based on the principle of counter-flow heat exchange. It utilizes the counter-flow of hot and cold fluids to allow the high-temperature fluid (the liquid to be subcooled) and the low-temperature fluid (the circulating liquid in circulation pipe 3-1) to fully exchange heat within the subcooling pipe 1, thus achieving efficient cooling. Within the subcooling pipe 1, circulation pipe 3-1 and subcooling pipe 1 form a unique heat exchange structure. The liquid to be subcooled flows in from one end of subcooling pipe 1 through port 2, while the circulating liquid flows within circulation pipe 3-1 driven by circulating water pump 7. The two flow in opposite directions, and the significant temperature difference between the hot and cold fluids facilitates heat transfer from the high-temperature liquid to the low-temperature circulating liquid, achieving subcooling of the liquid within subcooling pipe 1. After circulation water pump 7 starts, it provides power to the circulating liquid, causing it to extend from one end of circulation pipe 3-1 into circulation pipe 1 via guide pipe 5 and pump pipe 6. Circulation pipe 3-1 has a J-shaped bend structure, which helps to guide... The liquid flows along a specific path. Within the circulation pipe 3-1, the liquid passes through two flow chambers 3-5 divided by the dividing plate 3-4, and flows through a circulation channel composed of multiple annular covers 3-2 and connecting pipes 3-3, ultimately completing the circulation. During the circulation process, the water passage holes 3-7 and expansion holes 3-8 on the conical covers 3-6 at both ends of the dividing plate 3-4 change the direction of liquid flow, causing the liquid to be continuously disturbed within the flow chambers 3-5, increasing the contact area with the inner wall of the circulation pipe 3-1, and improving heat exchange efficiency. When the liquid flows within the circulation channel, the arrangement of multiple annular covers 3-2 and connecting pipes 3-3 forms a tortuous flow path, prolonging the residence time of the liquid in the subcooling pipe 1 and increasing the opportunity for heat exchange. At the same time, the flow conversion between different flow chambers 3-5 and annular covers 3-2 further enhances the turbulence of the liquid, breaks the boundary layer, and makes heat transfer more complete, thereby achieving a highly efficient cooling cycle. The core of the constant temperature protection component 4 is to maintain the temperature stability of the subcooled tube 1 and ensure the normal operation of the equipment. The constant temperature plate 4-3 is made of alumina with a melting point as high as 2054℃. Its corrugated cross section increases the contact area with the medium in the subcooled tube 1 and the constant temperature chamber 4-2. When the ambient temperature rises, the temperature of the subcooled tube 1 tends to rise. The constant temperature plate 4-3 absorbs the heat emitted by the subcooled tube 1 with its good thermal conductivity and stores the heat in itself and in the constant temperature chamber 4-2, thus slowing down the rate of temperature rise of the subcooled tube 1. When the ambient temperature drops, the temperature of the subcooled tube 1 drops. The constant temperature plate 4-3 releases the heat that it previously absorbed and stored and transfers it to the subcooled tube 1 through the constant temperature chamber 4-2 to prevent the temperature of the subcooled tube 1 from getting too low and ensure that the subcooled tube 1 is always in a suitable operating temperature range.

[0038] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A counter-current high-efficiency evaporative air cooler, characterized in that, include: Subcooling pipe (1), with connection ports (2) provided at opposite ends; Subcooling circulation assembly (3), wherein the subcooling circulation assembly (3) is disposed inside the subcooling tube (1); Thermostatic protection component (4) is disposed on the outside of the subcooling pipe (1); The subcooling circulation assembly (3) includes a circulation pipe (3-1), which is inserted into the subcooling pipe (1). One end of the circulation pipe (3-1) extends out of the subcooling pipe (1). An annular cover (3-2) is provided at the end of the circulation pipe (3-1). A circulation chamber (3-9) is provided inside the annular cover (3-2). There are several annular covers (3-2). Multiple annular covers (3-2) are equidistantly arranged inside the subcooling pipe (1). A connecting pipe (3-3) is sealed between multiple circulation chambers (3-9). A dividing plate (3-4) is provided inside both the circulation pipe (3-1) and the connecting pipe (3-3). The circulation pipe (3-1) and the connecting pipe (3-3) are divided into two flow guiding chambers (3-5) by the dividing plate (3-4).

2. The counter-flow high-efficiency evaporative air cooler according to claim 1, characterized in that, The two ends of the dividing plate (3-4) are respectively provided with conical covers (3-6), and the conical covers (3-6) have water passage holes (3-7) and expansion holes (3-8) on the water passage holes (3-7). The conical tips of the two conical covers (3-6) are in opposite directions.

3. The counter-flow high-efficiency evaporative air cooler according to claim 1, characterized in that, The constant temperature protection component (4) includes a constant temperature outer cover (4-1), which is fitted onto the subcooling tube (1). The constant temperature outer cover (4-1) has a constant temperature cavity (4-2) inside, and a constant temperature plate (4-3) is provided inside the constant temperature cavity (4-2). The constant temperature plate (4-3) has a circular structure and is fitted onto the subcooling tube (1).

4. A counter-current high-efficiency evaporative air cooler according to claim 3, characterized in that, The constant temperature plate (4-3) is made of aluminum oxide with a melting point of 2054℃, and the cross-section of the constant temperature plate (4-3) is wavy.

5. A counter-current high-efficiency evaporative air cooler according to claim 1, characterized in that, The side wall of the connection port (2) is provided with a plug groove (4-4), the side wall of the plug groove (4-4) is provided with a connecting ring (4-5), and the connecting ring (4-5) is provided with a connecting thread (4-6).

6. A counter-flow high-efficiency evaporative air cooler according to claim 1, characterized in that, The circulation pipe (3-1) has a J-shaped elbow structure, and the upper end of the circulation pipe (3-1) extends out of the subcooling pipe (1).

7. A counter-current high-efficiency evaporative air cooler according to claim 6, characterized in that, A guide pipe (5) is provided at one end of the circulation pipe (3-1) extending out of the subcooling pipe (1). A pump pipe (6) is provided at the end of the guide pipe (5). A circulating water pump (7) is provided on the pump pipe (6). The circulating water pump (7) is installed on the outer wall of the subcooling pipe (1). A pump platform (8) is provided between the circulating water pump (7) and the subcooling pipe (1).

8. A counter-current high-efficiency evaporative air cooler according to claim 1, characterized in that, A liquid inlet (9) is formed at the center of the annular cover (3-2), and the diameter of the liquid inlet (9) matches that of the connecting port (2).

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