An evaporative condenser unit

Abstract

The present invention relates to the technical field of heat exchange equipment, and specifically discloses an evaporative condenser unit, comprising a shell, a condenser, a spray device and a fan. The condenser, the spray device and the fan are all arranged in the shell, the spray device is used to spray liquid onto the condenser, an air inlet and an air outlet are provided on the shell, and the fan is located between the air inlet and the air outlet to form an air path between the air inlet and the air outlet, and at least a partial flow direction of the air path forms a downstream direction with the spraying direction of the spray device. The evaporative condenser unit provided by the present invention adopts a downstream method. When the spray water acts on the condenser, it is affected by the positive force of the wind and utilizes the capillary effect of the liquid on the condenser. The coil of the condenser is not easy to form a dry point, thereby realizing efficient utilization of the heat exchange area and giving full play to the heat exchange effect of the condenser.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchange equipment, and more particularly to an evaporative condenser unit. Background Art

[0002] An evaporative condenser is a highly efficient heat exchange device that combines the traditional water-cooling and air-cooling secondary heat exchange processes into one, making it widely used in industrial cooling processes. Currently, evaporative condensers primarily spray cooling water onto the heat exchanger surface, forming a water film that evaporates and removes the heat released by the medium.

[0003] Conventional evaporative condensers use a countercurrent cooling method, where the airflow direction is opposite to that of the spray water, delaying the heat exchange time, increasing the heat exchange effect, and achieving high heat exchange efficiency. However, the countercurrent method also brings the following problems: on the one hand, the air path flows from bottom to top, while the spray water flows from top to bottom. When the spray water flows down, it is easily affected by the reaction force of the wind, forming dry spots at the bottom of the condenser coil, which is a relatively ineffective heat exchange area, reducing the actual heat exchange area and failing to fully utilize the heat exchange effect of the condenser. On the other hand, in order to maximize the efficiency of heat exchange, evaporative condensation usually utilizes two-phase heat exchange from liquid to gas. The gas converted by heat exchange carries heat. When this part of the gas is discharged to the outside by the rising airflow, it is subjected to the downward spray resistance of the spray water, causing part of the heat to be absorbed by the water again, resulting in a decrease in the efficiency of heat discharge.

[0004] In summary, how to effectively solve the problem that the condenser of the evaporative condenser unit is prone to dry spots that affect the heat exchange efficiency is a problem that currently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, an object of the present invention is to provide an evaporative condenser unit, the structural design of which can effectively solve the problem that the condenser of the evaporative condenser unit is prone to dry spots affecting the heat exchange efficiency.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] An evaporative condenser unit includes a shell, a condenser arranged in the shell and a spraying device for spraying liquid onto the condenser, the shell is provided with an air inlet and an air outlet, a fan is provided between the air inlet and the air outlet to form an air path between the air inlet and the air outlet, and at least a partial flow direction of the air path forms a downstream flow with the spraying direction of the spraying device.

[0008] Optionally, in the above-mentioned evaporative condenser unit, the spray device is arranged below at least part of the condenser and the spray outlet of the spray device is arranged upward, the air inlet is arranged at the lower part of the shell, and the air outlet is arranged at the upper part of the shell.

[0009] Optionally, in the above-mentioned evaporative condenser unit, the air inlet is arranged at the lower part of at least one side wall of the shell, and the air outlet is arranged on the top surface of the shell.

[0010] Optionally, in the above-mentioned evaporative condenser unit, the spray device is arranged above the condenser and the spray outlet of the spray device is arranged downward, the air inlet is arranged at the upper part of the shell, and the air outlet is arranged at the lower part of the shell.

[0011] Optionally, in the above-mentioned evaporative condenser unit, the air outlet is arranged at the lower part of the side wall of the shell, and the air inlet is arranged on the top surface of the shell.

[0012] Optionally, in the above-mentioned evaporative condenser unit, the direction from the condenser inlet to the condenser outlet of the condenser is opposite to the flow direction of the air path.

[0013] Optionally, in the above-mentioned evaporative condenser unit, at least two condensers are provided in the shell and are spaced apart in the horizontal direction, and the spray device is provided corresponding to at least one of the condensers.

[0014] Optionally, in the above-mentioned evaporative condenser unit, the heat dissipation structure density of the condenser near the air inlet is smaller than the heat dissipation structure density near the air outlet.

[0015] Optionally, in the above-mentioned evaporative condenser unit, the condenser includes at least one of a tube-fin radiator, a tube radiator, and a plate radiator.

[0016] Optionally, in the above-mentioned evaporative condenser unit, the fan includes a supply fan arranged at the air inlet and / or an exhaust fan arranged at the air outlet.

[0017] Optionally, the evaporative condenser unit further includes a liquid collecting tank provided at the bottom end of the shell to receive the falling spray liquid.

[0018] Optionally, in the above-mentioned evaporative condenser unit, the liquid collecting tank is connected to the spraying device through a pipeline, and a liquid pump for pumping the spraying liquid in the liquid collecting tank to the spraying device is provided in the pipeline.

[0019] Optionally, the evaporative condenser unit further includes a water retainer provided between the air outlet and the condenser.

[0020] The evaporative condenser unit provided by the present invention includes a housing, a condenser, a spray device, and a fan. The condenser, spray device, and fan are all disposed within the housing. The spray device is used to spray liquid onto the condenser. The housing is provided with an air inlet and an air outlet. The fan is positioned between the air inlet and the air outlet to form an air path between the air inlet and the air outlet. At least a portion of the air path flows in a direction parallel to the spray direction of the spray device.

[0021] With the evaporative condenser unit provided by the present invention, at least a portion of the airflow path flows in parallel with the spray direction of the spray device. This downstream approach allows the spray water to act on the condenser, influenced by the positive force of the wind. The capillary effect of the liquid on the condenser reduces the risk of dry spots forming on the condenser coils, thereby achieving efficient utilization of the heat exchange area and fully maximizing the condenser's heat exchange efficiency. Furthermore, while the conventional countercurrent approach takes longer to heat exchange than the downstream approach of this application, the downstream approach significantly reduces the condenser's dry spots, thereby compensating for the reduced heat exchange time and achieving higher heat exchange efficiency.

[0022] In a preferred embodiment, the spray device is provided below at least part of the condenser and the spray outlet of the spray device is provided upward, the air inlet is provided at the lower part of the shell, and the air outlet is provided at the upper part of the shell. A bottom-up spraying method is formed corresponding to at least part of the condenser, and the wind flow direction is also from bottom to top, thus forming a reverse downstream. The reverse downstream method, on the one hand, is less likely to form a dry point in the condenser; on the other hand, the gas is discharged from the bottom to the top, so that the steam that has absorbed heat and turned into gas is quickly discharged from the upper part of the shell, and the spray water flows in the same direction as the gas, so it does not form resistance to it, thus avoiding the occurrence of secondary heat exchange and further ensuring the heat dissipation efficiency; furthermore, by adopting the downstream method, the spray liquid can be brought to a certain height under the downstream of the fan itself, thereby reducing the power requirement of the liquid pump, so a lower power liquid pump can be selected, thereby improving energy efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

[0024] Figure 1 This is a structural diagram of an evaporative condenser unit according to a first specific embodiment of the present invention;

[0025] Figure 2 This is a structural diagram of an evaporative condenser unit according to a second specific embodiment of the present invention;

[0026] Figure 3 This is a structural diagram of an evaporative condenser unit according to a third specific embodiment of the present invention;

[0027] Figure 4 This is a schematic structural diagram of an evaporative condenser unit according to a fourth specific embodiment of the present invention;

[0028] Figure 5 This is a schematic structural diagram of an evaporative condenser unit according to a fifth specific embodiment of the present invention;

[0029] Figure 6 This is a structural diagram of an evaporative condenser unit according to a sixth specific embodiment of the present invention.

[0030] The following are marked in the accompanying drawings:

[0031] Shell 1, condenser 2, spray device 3, fan 4, liquid collecting tank 5, liquid pump 6, pipeline 7, water retainer 8, air inlet 11, air outlet 12, condenser inlet 21, condenser outlet 22, heat dissipation pipe 23, spray outlet 31. DETAILED DESCRIPTION

[0032] An embodiment of the present invention discloses an evaporative condenser unit to prevent the occurrence of a dry point in the condenser.

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0034] The evaporative condenser unit provided in this application mainly controls the direction of its spray liquid and the direction of the air inlet and outlet to prevent the condenser from drying out and ensure heat exchange efficiency. The other specific structures of the evaporative condenser unit can refer to the settings of conventional evaporative condenser units and will not be repeated here.

[0035] In some embodiments, the evaporative condenser unit provided by the present invention includes a shell, a condenser, a spray device and a fan. The shell is the outer shell of the unit, and the condenser, the spray device and the fan are all arranged in the shell. The spray device is used to spray liquid onto the condenser. The specific structure of the spray device can refer to the existing technology and is not specifically limited here. An air inlet and an air outlet are provided on the shell, and the fan is located between the air inlet and the air outlet to form an air path between the air inlet and the air outlet. At least a partial flow direction of the air path forms a downstream flow with the spray direction of the spray device. The spray outlet of the spray device can be set upward or downward, and the spray direction formed is from bottom to top or from top to bottom. Correspondingly, at least a partial flow direction of the air path is also from bottom to top or from top to bottom. It can be understood that the top-down and bottom-up here are not limited to the resultant force of the spray or air path being in the vertical direction. When the resultant force is orthogonally decomposed into horizontal and vertical components, the vertical component of the resultant force of the spray and the resultant force of the air path is larger than the horizontal component, and both can be considered as top-down or bottom-up.

[0036] With the evaporative condenser unit provided by the present invention, at least a portion of the airflow path flows in parallel with the spray direction of the spray device. This downstream approach allows the spray water to act on the condenser, influenced by the positive force of the wind. The capillary effect of the liquid on the condenser reduces the risk of dry spots forming on the condenser coils, thereby achieving efficient utilization of the heat exchange area and fully maximizing the condenser's heat exchange efficiency. Furthermore, while the conventional countercurrent approach takes longer to heat exchange than the downstream approach of this application, the downstream approach significantly reduces the condenser's dry spots, thereby compensating for the reduced heat exchange time and achieving higher heat exchange efficiency.

[0037] In some embodiments, a spray device is positioned below at least a portion of the condenser, with the spray outlet of the spray device facing upward. The air inlet is positioned at the lower portion of the housing, and the air outlet is positioned at the upper portion of the housing. It is understood that a partial condenser includes a multi-layer arrangement of condenser coils, with the spray device positioned below the topmost coil or any coil below it, or includes a housing with at least two condensers spaced vertically apart, with the spray device positioned below the topmost condenser or any condenser below it. With the above arrangement, a bottom-up spray pattern is formed for at least a portion of the condenser positioned above the spray device, and the wind flow direction is also bottom-up, thereby forming a reverse downstream flow. In the reverse and downstream mode, on the one hand, it is not easy for the condenser to form a dry point; on the other hand, the gas is discharged from bottom to top, so that the steam that absorbs heat and turns into gas is quickly discharged from the upper part of the shell, and the spray water flows in the same direction as the gas, so it will not form resistance to it, avoiding the occurrence of secondary heat exchange and further ensuring the heat dissipation efficiency; furthermore, by adopting the downstream mode, the spray liquid can be brought to a certain height under the downstream of the fan itself, thereby reducing the requirements for the liquid pump power, so a lower power liquid pump can be selected, improving energy efficiency.

[0038] In some embodiments, see Figure 1 The spray device 3 is located below the integrated condenser 2, with its spray outlet 31 facing upward. The air inlet 11 is located at the lower portion of the housing 1, and the air outlet 12 is located at the upper portion of the housing 1. This creates a bottom-up spray pattern, with the air flow also being bottom-up. This prevents dry spots and secondary heat exchange in the condenser 2, reduces the power requirements of the liquid pump 6 supplying the spray device 3, and increases the contact time of the liquid on the heat exchanger. Furthermore, the spray device 3 is located below the integrated condenser 2, with few or no other components below it. This facilitates maintenance during use, such as replacing the spray device 3 with a new one or removing it for repair.

[0039] In some embodiments, the spray device 3 is disposed below the integral condenser 2, and the spray outlet 31 of the spray device 3 is disposed upward. The air inlet 11 is disposed at the lower portion of at least one side wall of the housing 1, and the air outlet 12 is disposed on the top surface of the housing 1, thereby forming an air path from bottom to top. The air inlet 11 is disposed on the side wall, and the air outlet 12 is disposed on the top surface of the housing 1, which facilitates layout. If space permits, the air inlet 11 can also be disposed on the bottom surface of the housing 1, and the air outlet 12 can also be disposed on the side wall of the housing 1. In other words, the lower portion of the housing 1 mentioned in the above embodiments includes both the lower portion of the side wall of the housing 1 and the bottom surface of the housing 1; the upper portion of the housing 1 includes both the top surface of the housing 1 and the upper portion of the side wall of the housing 1.

[0040] In some embodiments, see Figure 2 The spray device 3 is arranged above the condenser 2, and the spray outlet 31 of the spray device 3 is arranged downward. The air inlet 11 is arranged at the upper part of the shell 1, and the air outlet 12 is arranged at the lower part of the shell 1. That is, the overall spraying method is formed from top to bottom, and the air flow direction is also from top to bottom, which can also prevent the condenser 2 from drying out.

[0041] In some embodiments, see Figure 3 The spray device 3 is disposed below at least part of the condenser 2, and the spray outlet 31 of the spray device 3 is disposed upward. The air inlet 11 is disposed at the lower portion of the housing 1, and the air outlet 12 is disposed at the upper portion of the housing 1. That is, the spray device 3 is disposed in the middle portion of the condenser 2 relative to the upper and lower spaces. The above arrangement can enhance cooling of the portion of the condenser 2 above the spray device 3, while the portion of the condenser 2 above the spray device 3 relies on the flow of partially incompletely evaporated spray liquid to remove heat. This structure is particularly suitable for condensers 2 that adopt a top-in, bottom-out structure, that is, enhancing cooling of the portion of the condenser 2 above the spray device 3 where heat is higher, while the portion of the lower portion where heat is relatively lower relies on the flow of partially incompletely evaporated spray liquid to remove heat.

[0042] In some embodiments, see Figure 3 The spray device 3 is disposed above the condenser 2, with the spray outlet 31 of the spray device 3 facing downward. The air outlet 12 is disposed at the lower portion of the side wall of the housing 1, and the air inlet 11 is disposed at the top surface of the housing 1. The air outlet 12 is disposed on the side wall, and the air inlet 11 is disposed on the top surface of the housing 1, which facilitates layout. If space permits, the air outlet 12 can also be disposed on the bottom surface of the housing 1, and the air inlet 11 can also be disposed on the side wall of the housing 1. In other words, the lower portion of the housing 1 mentioned in the above embodiment includes both the lower portion of the side wall of the housing 1 and the bottom surface of the housing 1; the upper portion of the housing 1 includes both the top surface of the housing 1 and the upper portion of the side wall of the housing 1.

[0043] In some embodiments, the direction from the condenser inlet 21 to the condenser outlet 22 of the condenser 2 is opposite to the flow direction of the air path. It is understandable that the direction from the condenser inlet 21 to the condenser outlet 22 refers to top-in and bottom-out or bottom-in and top-out. If the spraying direction is from bottom to top and the wind flow direction is also from bottom to top, the condenser 2 is correspondingly top-in and bottom-out, that is, the condenser inlet 21 is located at the top and the condenser outlet 22 is located at the bottom. Since the temperature at one end of the condenser inlet 21 is higher and the temperature at one end of the condenser outlet 22 is lower, as set above, the gas flows from bottom to top, the temperature gradually increases, and is finally discharged from the upper air outlet 12, that is, the gas temperature gradually increases from bottom to top, which is the same as the direction of temperature change of the condenser 2, avoiding the secondary heating of the upper cold pipe by the hot gas with higher temperature after heat exchange caused by the opposite direction of the temperature increase of the gas temperature and the temperature increase of the condenser 2, thereby ensuring the heat exchange efficiency. Correspondingly, when the spraying direction is from top to bottom and the wind flow direction is also from top to bottom, the condenser 2 is correspondingly bottom-in and top-out, that is, the condenser inlet 21 is located at the bottom and the condenser outlet 22 is located at the top. The temperature of the gas gradually increases from top to bottom, which is the same as the direction of temperature change of the condenser 2. It can also avoid the secondary heating of the upper cold pipe 7 by the hot gas with higher temperature after heat exchange in the upper part, thereby ensuring the heat exchange efficiency.

[0044] In some embodiments, at least two condensers 2 are arranged in the horizontal direction and spaced apart in the housing 1, and a spray device 3 is provided for at least one condenser 2. Each condenser 2 may correspond to the same load or different loads. In the case that each condenser 2 corresponds to a different load, the spray device 3 may be provided or not provided accordingly according to the load size. In other words, a local spraying method or an overall spraying method may be adopted. Figure 4 As shown, when there are two condensers 2 spaced apart in the horizontal direction, a spraying device 3 can be provided for only one of the condensers 2. The spraying device 3 can be provided in an upper spraying or lower spraying manner. Figure 4The embodiment in the figure shows a bottom spraying method, i.e., the spraying device 3 is provided below at least part of the condenser 2, and the spraying outlet 31 of the spraying device 3 is provided upward, the corresponding air inlet 11 is provided at the lower portion of the housing 1, and the air outlet 12 is provided at the upper portion of the housing 1. In other embodiments, a top spraying method may also be adopted, i.e., the spraying device 3 is provided above the condenser 2, and the spraying outlet 31 of the spraying device 3 is provided downward, the air inlet 11 is provided at the upper portion of the housing 1, and the air outlet 12 is provided at the lower portion of the housing 1.

[0045] In some embodiments, see Figure 5 , the heat dissipation structure density of the condenser 2 near the air inlet 11 is less than the heat dissipation structure density near the air outlet 12. Taking the reverse flow as an example, the heat dissipation structure density below the condenser 2 is less than the heat dissipation structure density above. Since some liquid in the condenser 2 is not completely vaporized and falls from top to bottom due to gravity, it occupies part of the space of the pipeline. Therefore, in order to avoid the lower pipeline blocking the upper pipeline, the condenser 2 preferably adopts a sparse lower and dense upper structure, that is, the distribution density of the heat dissipation structure of the condenser 2, such as the heat pipe 23 and the heat dissipation fins, is large in upper density and small in lower density. The specific heat dissipation structure density can be set to gradually decrease from top to bottom. Figure 5 In the figure, the density variation of the heat dissipation structure, radiator pipe 23, is shown as an example. The arrangement of the air inlet 11 and air outlet 12, as well as the arrangement of the spray device 3 in this embodiment, can be referred to in the above embodiments and will not be repeated here. It will be understood that for downward spraying and downward blowing, the corresponding arrangement is such that the heat dissipation structure density at the top of the condenser 2 is less than that at the bottom.

[0046] In some embodiments, condenser 2 includes at least one of a tube-fin radiator, a tubular radiator, and a plate radiator. The selection of one or more of these condensers 2 is based on factors such as the load of condenser 2 and the application environment. The specific structures and operating principles of the tube-fin radiator, tubular radiator, and plate radiator can be referenced in the prior art and will not be further described here.

[0047] In some embodiments, the fan 4 includes a supply fan provided at the air inlet 11 and / or an exhaust fan provided at the air outlet 12. That is, the fan 4 can be provided at the air inlet side and / or the air outlet side of the air duct, and can be set accordingly according to factors such as the overall layout of the unit. Figure 1-Figure 2 In the embodiment shown, a blower is provided at the air inlet 11; Figure 3-Figure 6 In the illustrated embodiment, an exhaust fan is provided at the air outlet 12. Specifically, the fan 4 can be mounted on the housing 1. In other embodiments, the fan 4 can be provided at other locations in the air path, so that air can be drawn in through the air inlet 11 and discharged from the air outlet 12 after passing through the air path.

[0048] In some embodiments, the evaporative condenser unit further includes a liquid collection trough 5 at the bottom of the housing 1 to receive the falling spray liquid. The provision of the liquid collection trough 5 allows the falling spray liquid to be collected for reuse. In other embodiments, a drain port may also be provided at the bottom of the housing 1 to collect and discharge the falling spray liquid.

[0049] In some embodiments, the liquid collecting tank 5 is connected to the spraying device 3 through a pipe 7, and a liquid pump 6 is provided in the pipe 7 for pumping the spraying liquid in the liquid collecting tank 5 to the spraying device 3. A loop is formed by the liquid collecting tank 5, the liquid pump 6 and the spraying device 3, and the liquid pump 6 pumps the spraying liquid in the liquid collecting tank 5 to the spraying device 3. The spraying liquid is sprayed out from the spray outlet 31 of the spraying device 3. After fully interacting with the condenser 2, the condensed liquid that finally falls is collected in the liquid collecting tank 5, thereby realizing the recycling of the spraying liquid. The spraying device 3 does not need an external liquid supply system. In other embodiments, the spraying device 3 can also be provided with an interface and connected to an external liquid supply system when working. The liquid supply system also includes a liquid tank and a liquid pump. The liquid pump pumps the spraying liquid in the liquid tank to the spraying device 3.

[0050] In some embodiments, see Figures 1-6 , further comprising a water retainer 8 disposed between the air outlet 12 and the condenser 2. By providing the water retainer 8, the steam is condensed after passing through the water retainer 8 and becomes liquid again, which can flow back to the condenser 2. Therefore, the provision of the water retainer 8 effectively saves the spray liquid.

[0051] 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.

[0052] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily 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 is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An evaporative condenser unit, comprising a housing (1), a condenser (2) arranged in the housing (1), and a spraying device (3) for spraying liquid onto the condenser (2), characterized in that: The housing (1) is provided with an air inlet (11) and an air outlet (12), and a fan (4) is provided between the air inlet (11) and the air outlet (12) to form an air path between the air inlet (11) and the air outlet (12), and at least a partial flow direction of the air path forms a downstream flow with the spraying direction of the spraying device (3); The spray device (3) is arranged below at least a portion of the condenser (2) and the spray outlet (31) of the spray device (3) is arranged upward, the air inlet (11) is arranged at the lower part of the shell (1), and the air outlet (12) is arranged at the upper part of the shell (1); The direction from the condenser inlet (21) to the condenser outlet (22) of the condenser (2) is opposite to the flow direction of the air path; The heat dissipation structure density of the condenser (2) close to the air inlet (11) is smaller than the heat dissipation structure density close to the air outlet (12).

2. The evaporative condenser unit according to claim 1, characterized in that: The air inlet (11) is provided at the lower portion of at least one side wall of the shell (1), and the air outlet (12) is provided on the top surface of the shell (1).

3. The evaporative condenser unit according to claim 1 or 2, characterized in that: At least two condensers (2) are provided in the shell (1) and are spaced apart in the horizontal direction. The spray device (3) is provided corresponding to at least one of the condensers (2).

4. The evaporative condenser unit according to claim 1 or 2, characterized in that: The condenser (2) comprises at least one of a tube-fin radiator, a tube radiator, and a plate radiator.

5. The evaporative condenser unit according to claim 1 or 2, characterized in that: The fan (4) includes a blower provided at the air inlet (11) and / or an exhaust fan provided at the air outlet (12).

6. The evaporative condenser unit according to claim 1 or 2, characterized in that: It also includes a liquid collecting tank (5) provided at the bottom end of the shell (1) to receive the falling spray liquid.

7. The evaporative condenser unit according to claim 6, characterized in that: The liquid collecting tank (5) is connected to the spraying device (3) via a pipeline (7), and a liquid pump (6) is provided in the pipeline (7) for pumping the spraying liquid in the liquid collecting tank (5) to the spraying device (3).

8. The evaporative condenser unit according to claim 1 or 2, characterized in that: It also includes a water retainer (8) provided between the air outlet (12) and the condenser (2).

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