Evaporative condenser and evaporative condenser unit

Abstract

The present invention discloses an evaporative condenser, comprising a middle condenser tube portion located in the middle of the cross section of a cooling air channel and an outer condenser tube portion located at the edge of the cross section of the cooling air channel. In the flow direction of the cooling air, the cooling efficiency per unit cross section of the middle condenser tube portion is at least greater than the cooling efficiency per unit cross section of the outer condenser tube portion on one side. In the evaporative condenser, because the cooling efficiency per unit cross section of the middle condenser tube portion is at least greater than the cooling efficiency per unit cross section of the outer condenser tube portion on one side, it can correspond to the wind flow distribution method to ensure that the cooling effects of the middle and edge are close. In summary, the evaporative condenser can effectively solve the problem of waste of condenser pipelines or waste of refrigerant. The present invention also discloses an evaporative condenser unit including the above-mentioned evaporative condenser.

Description

Technical Field

[0001] The present invention relates to the field of condensation technology, and more specifically, to an evaporative condenser, and also to an evaporative condenser unit comprising the evaporative condenser. Background Art

[0002] The evaporative condensers currently used in the industry adopt a spray evaporation heat exchange method. In order to prevent leakage of the spray liquid, the condenser tube is wrapped around. After the gas enters from the air inlet, the condenser heat exchange part close to the wrapped side panel is far away from the main channel of the air duct. As a result, under the same fan air volume, the air volume on the side away from the main air duct is reduced, the wind pressure drops, and the heat exchange efficiency decreases. In other words, the effective use area of ​​the heat exchange part close to the side panel is reduced, resulting in waste of pipelines or refrigerant.

[0003] In summary, how to effectively solve the problem of waste of condenser pipes or waste of refrigerant is a problem that technical personnel in this field urgently need to solve. Summary of the invention

[0004] In view of this, the first object of the present invention is to provide an evaporative condenser, which can effectively solve the problem of waste of pipelines or waste of refrigerant. The second object of the present invention is to provide an evaporative condenser unit including the above-mentioned evaporative condenser.

[0005] In order to achieve the above first object, the present invention provides the following technical solutions:

[0006] An evaporative condenser comprises, in the transverse direction, a middle condenser tube portion located in the middle of a cooling air channel cross section and an outer condenser tube portion located at an edge of the cooling air channel cross section. In the cooling air flow direction, the cooling efficiency per unit cross section of the middle condenser tube portion is at least greater than the cooling efficiency per unit cross section of the outer condenser tube portion on one side.

[0007] In the evaporative condenser, when in use, it is installed in the evaporative condenser unit, the middle condensation pipe part is aligned with the center of the fan, and the outer condensation pipe part is located at the edge of the fan's air outlet, or even outside the fan's air outlet radiation surface, so that the wind flow through the outer condensation pipe part is smaller than the wind flow through the middle condensation pipe part. In the evaporative condenser, because the cooling efficiency per unit cross-section of the middle condensation pipe part is at least greater than the cooling efficiency per unit cross-section of the outer condensation pipe part on one side, it can correspond to the wind flow distribution method to ensure that the cooling effects in the middle and the edge are similar. In summary, the evaporative condenser can effectively solve the problem of waste of condenser pipes or waste of refrigerant.

[0008] Preferably, in the cooling wind flow direction, the total length of the middle condenser tube portion in the same area cross section is at least greater than the total length of the outer condenser tube portion on one side.

[0009] Preferably, in the cooling air flow direction, the length of the middle condenser tube portion is not less than that of the outer condenser tube portion, and the tube body density of the middle condenser tube portion is at least greater than the tube body density of the outer condenser tube portion on one side.

[0010] Preferably, in the cooling air flow direction, the tube body density of the middle condenser tube portion is at least greater than the tube body density of the outer condenser tube portion on one side.

[0011] Preferably, in a direction perpendicular to the flow direction of the cooling air, the tube body density of the middle condenser tube portion is at least greater than the tube body density of the outer condenser tube portion on one side.

[0012] Preferably, the thermal conductivity of the middle condensation tube portion is greater than the thermal conductivity of the outer condensation tube portion.

[0013] Preferably, both the middle condenser tube portion and the outer condenser tube portion are provided with fins, and the fin density of the middle condenser tube portion is at least greater than the fin density of the outer condenser tube portion on one side.

[0014] Preferably, in the cooling wind flow direction, the surface area of ​​the middle condenser pipe portion in contact with the air within a unit cross-section is greater than the surface area of ​​the surrounding outer condenser pipe portions in contact with the air within a unit cross-section.

[0015] Preferably, one or more ends of the middle condensation pipe portion are connected to the outer condensation pipe portion.

[0016] Preferably, the middle condensation pipe portion and the outer condensation pipe portion are arranged independently of each other.

[0017] In order to achieve the first objective mentioned above, the present invention also provides an evaporative condenser unit, including a middle condenser pipe section located in the middle of the cross section of the cooling air channel and an outer condenser pipe section located at the edge of the cross section of the cooling air channel, characterized in that, in the cooling air flow direction, the surface area of ​​the middle condenser pipe section in contact with the air per unit cross section is at least greater than the surface area of ​​the outer condenser pipe section on one side in contact with the air per unit cross section. By changing the surface area, the cooling efficiency of the former is greater than the cooling efficiency of the latter. Therefore, the same technical principle is adopted as the above-mentioned evaporative condenser unit, so the evaporative condenser unit also has the technical effect of the above-mentioned evaporative condenser unit.

[0018] Preferably, in the cooling wind flow direction, the total length of the middle condenser tube portion in the same area cross section is at least greater than the total length of the outer condenser tube portion on one side.

[0019] Preferably, in the cooling air flow direction, the length of the middle condenser tube portion is not less than that of the outer condenser tube portion, and the tube body density of the middle condenser tube portion is at least greater than the tube body density of the outer condenser tube portion on one side.

[0020] Preferably, in the cooling air flow direction, the tube body density of the middle condenser tube portion is at least greater than the tube body density of the outer condenser tube portion on one side.

[0021] Preferably, in a direction perpendicular to the flow direction of the cooling air, the tube body density of the middle condenser tube portion is at least greater than the tube body density of the outer condenser tube portion on one side.

[0022] Preferably, the thermal conductivity of the middle condenser tube portion is the same as the thermal conductivity of the outer condenser tube portion.

[0023] Preferably, both the middle condenser tube portion and the outer condenser tube portion are provided with fins, and the fin density of the middle condenser tube portion is at least greater than the fin density of the outer condenser tube portion on one side.

[0024] Preferably, in the cooling wind flow direction, the surface area of ​​the middle condenser pipe portion in contact with the air within a unit cross-section is greater than the surface area of ​​the surrounding outer condenser pipe portions in contact with the air within a unit cross-section.

[0025] Preferably, one or more ends of the middle condensation pipe portion are connected to the outer condensation pipe portion.

[0026] Preferably, the middle condensation pipe portion and the outer condensation pipe portion are arranged independently of each other.

[0027] In order to achieve the above second object, the present invention further provides an evaporative condenser unit, the evaporative condenser unit includes any of the above evaporative condensers, including a fan, in the extension direction of the cooling air channel, the projection of the middle condensation pipe portion of the evaporative condenser is located within the projection of the fan, and the projection of the outer condensation pipe portion of the evaporative condenser is at least partially located outside the projection of the fan. Since the above evaporative condenser has the above technical effects, the evaporative condenser unit having the evaporative condenser should also have corresponding technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1A schematic structural diagram of an evaporative condenser unit provided in an embodiment of the present invention;

[0030] Figure 2 for Figure 1 A schematic diagram of the structure of the condenser from above;

[0031] Figure 3 A schematic structural diagram of another evaporative condenser unit provided in an embodiment of the present invention;

[0032] Figure 4 for Figure 3 A schematic diagram of the structure of the condenser from above;

[0033] Figure 5 A schematic diagram of a top view of another condenser provided in an embodiment of the present invention;

[0034] Figure 6 A schematic diagram of a top view of another condenser provided in an embodiment of the present invention;

[0035] Figure 7 A schematic diagram of the distribution of cooling air channels of another evaporative condenser unit provided in an embodiment of the present invention;

[0036] Figure 8 A schematic diagram of the distribution of cooling air channels of another evaporative condenser unit provided in an embodiment of the present invention;

[0037] Fig. 9 A schematic diagram of the distribution of cooling air channels of another evaporative condenser unit provided in an embodiment of the present invention;

[0038] Fig.10 A schematic diagram of the distribution of cooling air channels of another evaporative condenser unit provided in an embodiment of the present invention.

[0039] The following are marked in the accompanying drawings:

[0040] The middle condensation pipe part 1, the outer condensation pipe part 2, the condensation pipe 3, the fin 4, the fan 5, the cross section 6, and the cold cooling air channel 7. DETAILED DESCRIPTION

[0041] The embodiment of the present invention discloses an evaporative condenser, which can effectively solve the problem of inconsistent cooling efficiency of different parts of the condenser.

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] See also Figure 1-Figure 9 , Figure 1 A schematic structural diagram of an evaporative condenser unit provided in an embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of the structure of the condenser from above; Figure 3 A schematic structural diagram of another evaporative condenser unit provided in an embodiment of the present invention; Figure 4 for Figure 3 A schematic diagram of the structure of the condenser from above; Figure 5 A schematic diagram of the structure of another condenser provided in an embodiment of the present invention; Figure 6 A schematic diagram of the structure of another condenser provided in an embodiment of the present invention; Figure 7 A schematic diagram of the distribution of cooling air channels of another evaporative condenser unit provided in an embodiment of the present invention; Figure 8 A schematic diagram of the distribution of cooling air channels of another evaporative condenser unit provided in an embodiment of the present invention; Fig. 9 A schematic diagram of the distribution of cooling air channels of another evaporative condenser unit provided in an embodiment of the present invention; Fig.10 A schematic diagram of the distribution of cooling air channels of another evaporative condenser unit provided in an embodiment of the present invention.

[0044] In a specific embodiment, this embodiment provides an evaporative condenser, which is mainly used in an evaporative condenser unit, and is generally connected in series in an air conditioning system. The evaporative condenser mainly includes a condenser tube 3 and a plurality of fins 4 connected to the condenser tube 3. When in use, a high-temperature refrigerant flows in the condenser tube 3, and the high-temperature refrigerant radiates heat to the outside through the tube wall of the condenser tube 3. The fins 4 are in thermal contact with the condenser tube 3, so that the heat can be transferred to the fins 4. Since the fins 4 have a large contact area with the air, the heat dissipation speed will be very fast.

[0045] In order to better describe the structural features of the evaporative condenser in this embodiment, along the transverse direction of the cooling air channel, the whole or part of the structure of the evaporative condenser is divided into a middle condensation tube portion 1 located in the middle of the cross section 6 of the cooling air channel 7 and an outer condensation tube portion 2 located at the edge of the cross section 6 of the cooling air channel 7, which are arranged in sequence. It should be noted that the middle and edge are relative concepts, that is, in a cross section 6, the part located in the center is the middle part, and the rest are the edge parts. The boundary between the edge part and the middle part can be divided according to actual needs, and is not limited here. The purpose here is to limit the existence of at least one set of middle and edge parts with such a distribution relationship, and the size of the middle and edge parts is not limited. Of course, in actual applications, it can also be divided according to the boundary corresponding to the boundary of the air inlet or air outlet of the fan 5 in the cooling air channel 7, as shown in the attached Figure 7 , divided by the boundary of the air inlet of fan 5, attached Figure 8 , divided by the boundary of the air outlet of the fan 5; of course, it can also be divided according to the size of the air volume at each cross-section of the cooling air channel, the middle part corresponds to the area with larger air volume at each cross-section, and the edge part corresponds to the area with smaller air volume at the cross-section.

[0046] The cross section 6, i.e. the transverse cross section, is not necessarily a straight line extending cooling air channel 7. Figure 7 , 8 , 9, 10, may also be curve extensions, so section 6 refers to the section perpendicular to the cooling wind flow direction at the current position of the cooling wind channel 7. Therefore, it can also be said that along the direction perpendicular to the cooling wind flow direction, the entire or partial structure of the evaporative condenser is divided into the middle condensation pipe part 1 and the outer condensation pipe part 2 which are arranged in sequence. For the curved cooling wind channel, the cooling wind flow direction changes due to the different positions of the cooling wind channel. Therefore, for each position of the cooling wind channel, the direction perpendicular to the cooling wind flow direction is not necessarily the same direction.

[0047] Generally, the outer condensation pipe parts 2 are arranged on both sides or around the middle condensation pipe part 1, such as: Figure 2 , 4 5. The outer condensation pipe parts 2 are arranged on both sides of the middle condensation pipe part 1; Figure 6 , the above-mentioned outer condensation tube sections 2 are arranged around the middle condensation tube section 1; of course, three or even more outer condensation tube sections 2 can be arranged around the middle condensation tube section 1. The middle condensation tube section 1 has a condensation tube 3 and a fin 4, and correspondingly, the outer condensation tube section 2 also has a condensation tube 3 and a fin 4. In addition, the middle condensation tube section 1 and the outer condensation tube section 2 can also be condensation tubes without fins. It should also be noted that the middle condensation tube section 1 and the outer condensation tube section 2 can belong to the same condensation tube 3, or they can belong to different condensation tubes 3.

[0048] In the cooling wind flow direction, the cooling efficiency per unit cross section of the middle condenser tube section is at least greater than the cooling efficiency per unit cross section of the outer condenser tube section on one side, so that in the cooling wind flow direction, the cooling efficiency per unit cross section of the middle condenser tube section 1 from one end to the other end in the cooling wind flow direction is at least greater than the cooling efficiency per unit cross section of the outer condenser tube section 2 on one side from one end to the other end in the cooling wind flow direction, that is, in the cross section of the same area, the cooling efficiency per unit cross section of the middle condenser tube section 1 from one end to the other end in the cooling wind flow direction is at least greater than the cooling efficiency per unit cross section of the outer condenser tube section 2 on one side from one end to the other end in the cooling wind flow direction. It should be noted that in the cooling wind flow direction, the cooling efficiency per unit cross section of the condenser tube section refers to the degree of cooling of the wind body with the same temperature and pressure from one end to the other end of the condenser tube section in the unit cross section in the cooling wind flow direction. The cooling efficiency per unit cross-section of the middle condenser tube section 1 is at least greater than the cooling efficiency per unit cross-section of the outer condenser tube section 2 on one side. It may be greater than the cooling efficiency per unit cross-section of the outer condenser tube section 2 on one side only, or the cooling efficiency per unit cross-section of the middle condenser tube section 1 may be greater than the cooling efficiency per unit cross-section of the outer condenser tube section 2 on all sides in the cooling air flow direction.

[0049] A specific form of expression, such as Figure 3 , along the cooling air flow direction, the length of the middle condenser tube section 1 and the outer condenser tube section 2 from one end to the other end is the same, at this time, the tube body distribution density of the middle condenser tube section 1 can be at least greater than the tube body distribution density of the outer condenser tube section 2 on one side, and / or the fin distribution density of the middle condenser tube section 1 can be at least greater than the fin distribution density of the outer condenser tube section 2 on one side. Figure 1 , the distribution density of the tube body of the middle condenser tube section 1 is at least greater than the distribution density of the tube body of the outer condenser tube section 2 on one side, such as Figure 3 , the fin distribution density of the middle condenser tube part 1 is at least greater than the fin distribution density of the outer condenser tube part 2 on one side. In another form, when the tube body distribution density and the fin distribution density of the middle condenser tube part 1 and the outer condenser tube part 2 are equal, the length of the middle condenser tube part 1 from one end to the other end along the cooling air flow direction can be longer than the length of the outer condenser tube part 2. Of course, the above two forms can also be combined as needed.

[0050] In this evaporative condenser, when in use, it is installed in the evaporative condenser unit, the middle condenser tube section 1 is aligned with the center of the fan 5, and the outer condenser tube section 2 is located at the edge of the air outlet of the fan 5, or even outside the air outlet radiation surface of the fan 5, so that the wind flow rate passing through the outer condenser tube section 2 is smaller than the wind flow rate of the middle condenser tube section 1. In this evaporative condenser, because the cooling efficiency per unit cross-section of the middle condenser tube section 1 is at least greater than the cooling efficiency per unit cross-section of the outer condenser tube section 2 on one side, it can correspond to the wind flow distribution mode, that is, per unit time, the air volume flowing into the unit cross-section of the middle condenser tube section 1 is greater than the air volume flowing through the unit cross-section of the outer condenser tube section 2, and the corresponding cooling efficiency of the middle condenser tube section 1 is higher than the cooling efficiency of the outer condenser tube section 2, so that at the air outlet, the wind body temperature of the middle condenser tube section 1 and the wind body temperature of the outer condenser tube section 2 can be consistent. To ensure that the cooling effects in the middle and the edge are similar, for example, more coils can be arranged in the middle and fewer coils can be arranged on the outside, which can effectively solve the problem of waste of condenser pipes or waste of refrigerant.

[0051] It should be noted that in the direction perpendicular to the cooling air flow direction, the entire evaporative condenser is divided into a middle condenser pipe section 1 and an outer condenser pipe section 2. The structural features of the two parts are only for the convenience of description, and the two parts are not limited to being two independent parts. Therefore, the outer condenser pipe section 2 and the middle condenser pipe section 1 are independently arranged, and can be connected in parallel or in series through external connectors to be located in the same air conditioning system, or can be completely attributed to different air conditioning systems.

[0052] Of course, the outer condensation tube part 2 and the middle condensation tube part 1 can also be integrally connected to each other so that they are connected to each other through one port or multiple ports. Among them, the multiple ports are connected, specifically, a condensation tube is coiled back and forth in a direction perpendicular to the flow direction of the cooling wind, and the middle structure is the middle condensation tube part 1, and the outer structure is the outer condensation tube part 2. A simple coiling method, such as a condensation tube is coiled back and forth twice in the middle, and then extends to one side to become a part of the outer side, and coils back and forth once on the outer side, and then enters the middle and coils twice. One of the ports is connected, at this time, a condensation tube can be first coiled in the middle to form a middle structure, and then extended to the outside to coil on the outside to form an outer structure.

[0053] In a specific embodiment, for the above-mentioned evaporative condenser, the difference in cooling efficiency can also be reflected in the following manner, that is, in the cooling wind flow direction, the surface area of ​​the middle condenser tube part 1 in contact with the air per unit cross section is at least greater than the surface area of ​​the outer condenser tube part 2 in contact with the air per unit cross section. However, in this case, the thermal conductivity of the middle condenser tube part 1 can be made the same as the thermal conductivity of the outer condenser tube part 2.

[0054] Of course, in another embodiment, in the cooling wind flow direction, the surface area of ​​the middle condenser tube section 1 in contact with the air per unit cross section may be equal to the surface area of ​​the outer condenser tube section 2 in contact with the air per unit cross section on one side, but the cooling efficiency of the former is greater than the cooling efficiency of the latter. Specifically, the middle condenser tube section 1 and the outer condenser tube section 2 may be made of different materials so that the thermal conductivity of the middle condenser tube section 1 is high and the thermal conductivity of the outer condenser tube section 2 is small. At this time, the surface area of ​​the outer condenser tube section 2 may be greater than the surface area of ​​the middle condenser tube section 1. For example, the middle condenser tube section 1 may be a copper condenser tube section, and the outer condenser tube section 2 may be an aluminum condenser tube section.

[0055] Of course, the surface area of ​​the middle condenser tube part 1 in contact with the air per unit cross-section is sufficiently larger than the surface area of ​​the outer condenser tube part 2 on one side in contact with the air per unit cross-section. The middle condenser tube part 1 can also be an aluminum condenser tube part, and the outer condenser tube part 2 can be a copper condenser tube part.

[0056] In a specific embodiment, based on the above embodiment, as shown in the attached Figure 1 , in the cooling wind flow direction, the total length of the middle condenser pipe part 1 in the same area cross section can be at least greater than the total length of the outer condenser pipe part 2 on one side, so that the middle condenser pipe part 1 has more pipes to participate in the work, so that the wind passes through more pipes, and thus the wind can be more concentrated for cooling. The specific manifestation is as described above.

[0057] In a specific embodiment, based on the above embodiment, as shown in the attached Figure 2 , so that in the cooling air flow direction, the length of the middle condenser tube portion 1 is not less than that of the outer condenser tube portion 2, and the tube body density of the middle condenser tube portion 1 is at least greater than the tube body density of the outer condenser tube portion 2 on one side, so that the length of the middle condenser tube portion 1 can be close to the length of the outer condenser tube portion 2 to ensure the space utilization effect.

[0058] The tube density of the middle condenser tube portion 1 is at least greater than the tube density of the outer condenser tube portion 2 on one side. Specifically, in the cooling air flow direction, the tube density of the middle condenser tube portion 1 is at least greater than the tube density of the outer condenser tube portion 2 on one side, so that in the cooling air flow direction, the tube distribution of the middle condenser tube portion 1 is denser than that of the outer condenser tube portion 2, such as Figure 1 As shown; the tube density of the middle condenser tube portion 1 may be at least greater than the tube density of the outer condenser tube portion 2 on one side in a direction perpendicular to the cooling air flow direction; so that in a direction perpendicular to the cooling air flow direction, the tube distribution of the middle condenser tube portion 1 is denser than that of the outer condenser tube portion 2, such as Figure 2 Of course, both of the above methods can be used, such as Figure 2 and Figure 1 The perspective of the same structure.

[0059] In a specific embodiment, based on the above embodiment, the fin density of the middle condenser tube part 1 can be at least greater than the fin density of the outer condenser tube part 2 on one side in the cooling air flow direction. Specifically, when the length of the middle condenser tube part 1 is not less than that of the outer condenser tube part 2 on the cooling air flow direction, the fin density of the middle condenser tube part 1 can be at least greater than the fin density of the outer condenser tube part 2 on one side. In this way, the fin content of the middle condenser tube part 1 is increased and dense, so that the cooling efficiency of the middle condenser tube part 1 is higher.

[0060] Based on the evaporative condenser provided in the above embodiments, the present invention further provides an evaporative condenser unit, which includes any one of the evaporative condensers in the above embodiments, and also includes a fan. Generally speaking, the fan 5 and the evaporative condenser can be arranged in sequence from top to bottom, or from bottom to top, or from left to right or from right to left. In the extension direction of the cooling air channel, the projection of the middle condensation pipe portion 1 of the evaporative condenser is located within the projection of the fan 5, and the projection of the outer condensation pipe portion 2 of the evaporative condenser is at least partially located outside the projection of the fan 5. Since the evaporative condenser unit adopts the evaporative condenser in the above embodiments, please refer to the above embodiments for the beneficial effects of the evaporative condenser unit. The air inlet extension surface refers to the surface formed by the air inlet edge extending in the direction of the air inlet.

[0061] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0062] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An evaporative condenser, comprising a middle condenser pipe portion located in the middle of a cross section of a cooling air channel and an outer condenser pipe portion located at an edge of the cross section of the cooling air channel, wherein the outer condenser pipe portions are arranged on the left and right sides of the middle condenser pipe portion, characterized in that: In the cooling air flow direction, the cooling efficiency per unit cross-section of the middle condenser tube section is at least greater than the cooling efficiency per unit cross-section of the outer condenser tube section on one side; the total length of the tube body of the middle condenser tube section in the same area cross-section in the cooling air flow direction is at least greater than the total length of the tube body of the outer condenser tube section on one side, or the length of the middle condenser tube section in the cooling air flow direction is not less than that of the outer condenser tube section and the tube body density of the middle condenser tube section is at least greater than the tube body density of the outer condenser tube section on one side, or the thermal conductivity of the middle condenser tube section is greater than that of the outer condenser tube section; the outer condenser tube section and the middle condenser tube section can be connected in parallel or in series through connectors so that they can be located in the same air-conditioning system.

2. The evaporative condenser according to claim 1, characterized in that: In the cooling air flow direction, the tube body density of the middle condensation tube portion is at least greater than the tube body density of the outer condensation tube portion on one side.

3. The evaporative condenser according to claim 1, characterized in that: In a direction perpendicular to the flow direction of the cooling wind, the tube body density of the middle condensation tube portion is at least greater than the tube body density of the outer condensation tube portion on one side.

4. The evaporative condenser according to any one of claims 1 to 3, characterized in that: The middle condenser tube portion and the outer condenser tube portion are both provided with fins, and the fin density of the middle condenser tube portion is at least greater than the fin density of the outer condenser tube portion on one side.

5. The evaporative condenser according to any one of claims 1 to 3, characterized in that: In the cooling wind flow direction, the surface area of ​​the middle condensation pipe portion in contact with the air within a unit cross-section is greater than the surface area of ​​the outer condensation pipe portion in contact with the air within a unit cross-section.

6. The evaporative condenser according to any one of claims 1 to 3, characterized in that: One or more ends of the middle condensation pipe portion are connected to the outer condensation pipe portion.

7. The evaporative condenser according to any one of claims 1 to 3, characterized in that: The middle condensation pipe portion and the outer condensation pipe portion are independently arranged from each other.

8. An evaporative condenser, comprising a middle condenser pipe portion located in the middle of a cross section of a cooling air channel and an outer condenser pipe portion located at an edge of the cross section of the cooling air channel, wherein the outer condenser pipe portions are arranged on both sides of the middle condenser pipe portion, characterized in that: In the cooling air flow direction, the surface area of ​​the middle condenser tube section in contact with the air within a unit cross-section is at least greater than the surface area of ​​the outer condenser tube section on one side in contact with the air within a unit cross-section; the outer condenser tube section and the middle condenser tube section can be connected in parallel or in series through connecting parts so that they can be located in the same air-conditioning system.

9. The evaporative condenser according to claim 8, characterized in that: In the cooling wind flow direction, the total length of the middle condenser tube portion in the same area cross section is at least greater than the total length of the outer condenser tube portion on one side.

10. The evaporative condenser according to claim 8, characterized in that The length of the middle condenser tube portion in the cooling air flow direction is not less than that of the outer condenser tube portion, and the tube body density of the middle condenser tube portion is greater than the tube body density of the outer condenser tube portion on one side at least.

11. The evaporative condenser according to claim 10, characterized in that: In the cooling air flow direction, the tube body density of the middle condensation tube portion is at least greater than the tube body density of the outer condensation tube portion on one side.

12. The evaporative condenser according to claim 11, characterized in that In a direction perpendicular to the flow direction of the cooling wind, the tube body density of the middle condensation tube portion is at least greater than the tube body density of the outer condensation tube portion on one side.

13. The evaporative condenser according to claim 8, characterized in that The thermal conductivity of the middle condensation tube portion is the same as the thermal conductivity of the outer condensation tube portion.

14. The evaporative condenser according to any one of claims 8 to 13, characterized in that: The middle condenser tube portion and the outer condenser tube portion are both provided with fins, and the fin density of the middle condenser tube portion is at least greater than the fin density of the outer condenser tube portion on one side.

15. The evaporative condenser according to any one of claims 8 to 13, characterized in that: In the cooling wind flow direction, the surface area of ​​the middle condensation pipe portion in contact with the air within a unit cross-section is greater than the surface area of ​​the outer condensation pipe portion in contact with the air within a unit cross-section.

16. The evaporative condenser according to any one of claims 8 to 13, characterized in that: One or more ends of the middle condensation pipe portion are connected to the outer condensation pipe portion.

17. The evaporative condenser according to any one of claims 8 to 13, characterized in that: The middle condensation pipe portion and the outer condensation pipe portion are independently arranged from each other.

18. An evaporative condenser unit, comprising a fan, characterized in that: It also includes the evaporative condenser as described in any one of claims 1 to 17, wherein in the extension direction of the cooling air channel, the projection of the middle condensation tube portion of the evaporative condenser is located within the projection of the fan, and the projection of the outer condensation tube portion of the evaporative condenser is at least partially located outside the projection of the fan.

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