An evaporative condenser unit and an air outlet height control method thereof

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, and the spray port of the spray device is arranged upward or downward; an air inlet and an air outlet are respectively provided on opposite sides of 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. The flow direction of the air path is orthogonal to the spray direction of the spray device, and the height of the air outlet on the shell is adjustable. The evaporative condenser unit provided by the present invention can adjust the height of the air outlet according to the speed of the fan to better remove the heat of the evaporated steam, further reduce the real-time wind resistance, and improve the real-time energy efficiency of the evaporative condenser unit. The present invention also discloses a method for controlling the height of the air outlet of the evaporative condenser unit, which also has the above-mentioned technical effects.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchange equipment, and more particularly to an evaporative condenser unit and an air outlet height control method thereof. 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, with the air flowing in the opposite direction of the spray water. Typically, the air inlet is on one side of the shell, and the air outlet is at the top, forming an arc or curve. However, this inlet and outlet configuration results in a relatively high evaporative condenser height, making it susceptible to height restrictions during equipment transportation. Furthermore, the longer airflow path introduces additional windage losses. Furthermore, the curved flow path prevents some airflow from effectively entering the heat exchanger due to centrifugal force, resulting in uneven heating and partial ineffectiveness of the heat exchanger.

[0004] In summary, how to effectively solve the problem of high energy consumption caused by large wind resistance of evaporative condenser units is a problem that currently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the object of the present invention is to provide an evaporative condenser unit and an air outlet height control method thereof, the structural design of the evaporative condenser unit can effectively solve the problem of high energy consumption caused by large wind resistance of the evaporative condenser unit.

[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 spray port of the spraying device is set to face upward or downward, an air inlet and an air outlet are respectively provided on opposite sides of the shell, and the height of the air outlet on the shell is adjustable, and 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.

[0008] Optionally, in the above-mentioned evaporative condenser unit, a strip window is provided on the shell, a shielding component is provided on the strip window to seal different parts of the strip window, and the open part of the strip window forms the air outlet.

[0009] Optionally, in the above-mentioned evaporative condenser unit, the shielding component includes a shutter, and the shutter has a plurality of blades arranged in sequence along the vertical direction, and each of the blades is rotatably connected to the shell to be opened or closed.

[0010] Optionally, in the above-mentioned evaporative condenser unit, the shielding assembly further includes a plurality of shielding driving components, and the output end of each of the shielding driving components is respectively connected to the corresponding at least one fan blade to drive the corresponding fan blade to close or open.

[0011] Optionally, the evaporative condenser unit further includes an air outlet portion slidably mounted on the shell, and the air outlet portion corresponds to the strip window.

[0012] Optionally, in the above-mentioned evaporative condenser unit, the air outlet is an exhaust fan.

[0013] Optionally, in the above-mentioned evaporative condenser unit, a slide rail is provided on the shell, and the air outlet is provided on the slide rail and can slide along the slide rail.

[0014] Optionally, the evaporative condenser unit further includes a lifting drive component, and an output end of the lifting drive component is connected to the air outlet portion to drive the air outlet portion to rise and fall.

[0015] Optionally, in the above-mentioned evaporative condenser unit, the lifting drive component includes a lifting motor; or,

[0016] The lifting drive component includes an electromagnet and a permanent magnet. One of the air outlet and the shell is provided with the electromagnet, and the other is provided with the permanent magnet. The magnetic force between the electromagnet and the permanent magnet is used to drive the air outlet to rise.

[0017] The evaporative condenser unit provided by the present invention comprises a housing, a condenser, a spray device, and a fan. The condenser, spray device, and fan are all mounted within the housing. The spray device is used to spray liquid onto the condenser, with the spray port facing upward or downward. An air inlet and an air outlet are provided on opposite sides of the housing, respectively. The fan is positioned between the air inlet and the air outlet to form an air path between the two. The air flow direction of the air path is orthogonal to the spray direction of the spray device, and the height of the air outlet on the housing is adjustable.

[0018] In the evaporative condenser unit provided by the present invention, the spray port of the spray device is set upward or downward, and the air inlet and the air outlet are set on opposite sides of the shell. The flow direction of the air path formed is orthogonal to the spray direction, and the path of the air path is the shortest, so the wind resistance loss is small, which is conducive to improving the heat exchange efficiency of the evaporative condenser unit. In addition, the flow direction of the air path is orthogonal to the spray direction of the spray device, and the air flow can effectively enter the condenser space, thereby avoiding the problem that part of the air flow brought by the arc flow path cannot effectively enter the condenser space due to the centrifugal force, causing the condenser to be heated unevenly, that is, the temperature uniformity of the condenser is improved, and the power consumption is reduced under the condition of the same heat exchange area. In addition, since the air path formed between the air inlet and the air outlet mainly takes away the heat of the evaporated steam, and the evaporated steam is usually water vapor, its density is smaller than that of air, and thus it will naturally generate a buoyant force, the flow direction of the air path is under the combined effect of the air supply force of the fan and the buoyancy of the evaporated steam, the outlet position will be slightly higher than the inlet position. In view of this, the height of the air outlet is set to be adjustable in this application, so that the height of the air outlet can be adjusted accordingly according to the speed of the fan to better remove the heat of the evaporating steam, further reduce the real-time wind resistance, and improve the real-time energy efficiency of the evaporative condenser unit.

[0019] In order to achieve the above object, the present invention provides the following technical solutions:

[0020] A method for controlling the air outlet height of an evaporative condenser unit, used for any of the above-mentioned evaporative condenser units, comprises:

[0021] Obtaining the rotation speed of the fan;

[0022] The height of the air outlet is adjusted according to the rotation speed of the fan.

[0023] The method for controlling the air outlet height of an evaporative condenser unit provided by the present invention ensures that the airflow direction is orthogonal to the spray direction, minimizing the air path and thus reducing windage losses, thereby improving the heat exchange efficiency of the evaporative condenser unit. Furthermore, the air outlet height is adjusted according to the fan speed to better remove the heat from the evaporating steam, further reducing real-time windage and improving the real-time energy efficiency of the evaporative condenser unit.

[0024] Optionally, in the above-mentioned air outlet height control method, adjusting the height of the air outlet according to the rotation speed of the fan specifically includes:

[0025] When the rotation speed of the fan increases, the height of the air outlet is lowered; when the rotation speed of the fan decreases, the height of the air outlet is raised.

[0026] Optionally, the above-mentioned air outlet height control method further includes:

[0027] The air outlet is set at a preset initial height;

[0028] When the speed of the fan increases, the height of the air outlet is lowered; when the speed of the fan decreases, the height of the air outlet is raised, specifically including:

[0029] Determine whether the real-time load is not less than the target load. If so, reduce the speed of the fan and control the air outlet to rise to a corresponding height according to the reduction in the fan speed; otherwise, increase the speed of the fan and control the air outlet to lower to a corresponding height according to the increase in the fan speed.

[0030] Optionally, the above-mentioned air outlet height control method further includes:

[0031] When the rotation speed of the fan is maintained within a preset rotation speed range, the height of the air outlet is controlled to be the preset initial height.

[0032] Optionally, in the above-mentioned air outlet height control method, when the speed of the fan increases, the height of the air outlet is reduced, specifically comprising:

[0033] When the speed of the fan increases, the height of the air outlet is lowered until the height of the air outlet is consistent with the height of the air inlet;

[0034] When the speed of the fan decreases, the height of the air outlet is increased, specifically comprising:

[0035] When the rotation speed of the fan decreases, the height of the air outlet is increased until the maximum height of the air outlet is reached. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] 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.

[0037] Figure 1 This is a structural diagram of an evaporative condenser unit according to a specific embodiment of the present invention;

[0038] Figure 2 This is a structural schematic diagram of an evaporative condenser unit according to another specific embodiment of the present invention;

[0039] Figure 3 for Figure 2 Schematic diagram of the structure of the middle shutter;

[0040] Figure 4 for Figure 3 Side view of;

[0041] Figure 5 This is a schematic diagram of force analysis at the air outlet;

[0042] Figure 6 The figure is a flow chart of a method for controlling the height of an air outlet according to a specific embodiment of the present invention.

[0043] The following are marked in the accompanying drawings:

[0044] Shell 1, condenser 2, spray device 3, fan 4, exhaust fan 41, liquid collecting tank 5, liquid pump 6, pipeline 7, water retainer 8, air inlet 11, air outlet 12, strip window 13, shutter 14, fan blade 141, rotating shaft 142, slide rail 15, heat dissipation pipe 21, spray outlet 31. DETAILED DESCRIPTION

[0045] The embodiment of the present invention discloses an evaporative condenser unit and an air outlet height control method thereof, so as to reduce the wind resistance of the evaporative condenser unit and improve its energy efficiency.

[0046] 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.

[0047] The evaporative condenser unit provided in this application primarily controls the direction and height of its air inlet and outlet to coordinate with the spray direction of the spray liquid, thereby reducing wind resistance and improving energy efficiency. The other specific structures of the evaporative condenser unit can be referenced to the settings of conventional evaporative condenser units and will not be described in detail here.

[0048] In some embodiments, see Figure 1The evaporative condenser unit provided by the present invention includes a shell 1, a condenser 2, a spray device 3 and a fan 4. Among them, the condenser 2, the spray device 3 and the fan 4 are all arranged in the shell 1. The spray device 3 is used to spray liquid onto the condenser 2. The spray port of the spray device 3 is set upward or downward, and the spray direction is vertical. It can be understood that the spray direction along the vertical direction is not limited to the resultant force of the spraying being along the vertical direction. When the resultant force is orthogonally decomposed into horizontal and vertical components, the component of the resultant force in the spray direction in the vertical direction is larger than the horizontal direction, and can be considered as vertical. An air inlet 11 and an air outlet 12 are respectively provided on opposite sides of the shell 1. The top of the shell 1 is closed. The fan 4 is located 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. The flow direction of the air path is horizontal, so that the flow direction of the air path is orthogonal to the spray direction of the spray device 3. It should be noted that the orthogonal here means that the spraying direction of the spray device is vertical, that is, when spraying upward or downward, the air outlet 12 and the air inlet 11 are respectively arranged on the front and rear side walls or the left and right side walls of the shell, and the height of the air outlet 12 on the shell 1 is adjustable, that is, the height of the air outlet 12 can be adjusted accordingly according to the rotation speed of the fan 4.

[0049] In the evaporative condenser unit provided by the present invention, the spraying direction is vertical, and the air inlet 11 and the air outlet 12 are arranged on opposite sides of the shell 1. The flow direction of the air path formed is orthogonal to the spraying direction, and the path of the air path is the shortest, so the wind resistance loss is small, which is conducive to improving the heat exchange efficiency of the evaporative condenser unit. In addition, the flow direction of the air path is orthogonal to the spraying direction of the spray device 3, and the air flow can effectively enter the space of the condenser 2, thereby avoiding the problem of part of the air flow brought by the arc flow path being unable to effectively enter the space of the condenser 2 due to the centrifugal force, resulting in uneven heating of the condenser 2, that is, improving the temperature uniformity of the condenser 2, and reducing power consumption under the condition of the same heat exchange area.

[0050] Furthermore, since the air path formed between air inlet 11 and air outlet 12 primarily removes heat from the evaporating vapor, and since evaporating vapor is typically water vapor with a lower density than air, it naturally generates an upward force. The combined force of the air supply force of fan 4 and the buoyancy of the evaporating vapor causes the air outlet position to be slightly higher than the air inlet position. In view of this, the height of air outlet 12 is set to be adjustable in this application. This height can be adjusted accordingly based on the speed of fan 4 to better remove the heat from the evaporating vapor, further reducing real-time wind resistance and improving the real-time energy efficiency of the evaporative condenser unit.

[0051] Furthermore, the top of the housing 1 is closed, and the air inlet and outlet are arranged on both sides. Even when the wind is low or the fan 4 is shut down, the steam evaporated by the spray device 3 can more easily rise directly to the top of the housing 1 and fall back after condensing at the top, thereby reducing the amount of steam flowing out through the air outlet 12 and achieving the effect of saving water. In addition, the air inlet 11 and the air outlet 12 are arranged on opposite sides of the housing 1, and the fan 4 can be correspondingly arranged on the side wall of the housing 1. This arrangement effectively utilizes the lateral space, reduces the height space required by the entire evaporative condenser unit, and helps to reduce the height of the evaporative condenser unit, thereby being less susceptible to height restrictions during transportation.

[0052] In some embodiments, see Figure 2-Figure 4 A strip window 13 is provided on the shell 1, and a shielding component is provided on the strip window 13 to seal different parts of the strip window 13, and the open part of the strip window 13 forms the air outlet 12. The strip window 13 provides space for the movement of the air outlet 12, and the shielding component blocks and seals the different height parts of the strip window 13, and the remaining open part can be used as the air outlet 12. By blocking different positions with the shielding component, the height of the air outlet 12 can be continuously adjusted. In other embodiments, a plurality of through holes can also be provided on the shell 1, and the plurality of through holes are distributed in the up and down directions. The shielding component can be detachably connected to different through holes, and the unshielded through holes can be used as the air outlet 12, thereby realizing the adjustment of the height of the air outlet 12.

[0053] In some embodiments, the shielding assembly includes a shutter 14, which has a plurality of blades 141 arranged in sequence along the vertical direction, and each blade 141 is rotatably connected to the housing 1 to open or close. That is, the arrangement direction of the plurality of blades 141 is vertical, so that when different blades 141 are opened or closed, the shielding and sealing of different height portions of the strip window 13 can be achieved. It is understandable that each blade 141 is rotatably connected to the housing 1, and the blade 141 can be directly connected to the housing 1 through a rotating shaft 142, or a connecting frame can be provided, and each blade 141 is connected to the connecting frame through a rotating shaft 142, and the connecting frame is fixed to the housing 1. The shutter 14 is used for shielding, and the structure is simple and the sealing is good. In other embodiments, the shielding assembly can also use flexible materials, such as rubber-like soft connecting materials, etc., to partially block the strip window 13.

[0054] In some embodiments, the shielding assembly also includes a plurality of shielding drive components, and the output end of each shielding drive component is respectively connected to at least one corresponding fan blade 141 to drive the corresponding fan blade 141 to close or open. The shutter 14 is combined with the shielding drive component to realize the opening or closing of the window. Each fan blade 141 can be a single-axis drive, that is, each fan blade 141 is independently controlled to play an opening or shielding role, or a plurality of fan blades 141 can be a group to achieve synchronous opening or shielding. Specifically, the shielding drive component can adopt a motor to drive the fan blades 141 to rotate. In other embodiments, the shielding drive component can also adopt a telescopic cylinder to push the fan blades 141 to rotate by the extension and contraction of the piston rod of the telescopic cylinder.

[0055] In some embodiments, an air outlet is slidably mounted on the housing 1 corresponding to the strip-shaped window 13. It is understood that the air outlet has an outlet for gas discharge. The air outlet slides up and down along the housing 1. The portion of the air outlet corresponding to the strip-shaped window 13 is the air outlet 12. The gap between the air outlet and the remaining strip-shaped window 13 is blocked and sealed by a shielding assembly, so that airflow can only be discharged from the air outlet. The air outlet height can be adjusted by controlling the height of the air outlet. The air outlet is slidably mounted on the housing 1, facilitating continuous adjustment of the height of the air outlet 12.

[0056] In some embodiments, the air outlet is an exhaust fan 41. That is, the fan 4 uses an exhaust fan 41 located at the air outlet 12, and the exhaust of the exhaust fan 41 is used to form an air path. The height of the air outlet 12 can be adjusted by adjusting the height of the exhaust fan 41. After the exhaust fan 41 moves, the gap of the reserved strip window 13 is closed by the fan blade 141 to prevent air leakage; when the exhaust fan 41 moves to the set position, the fan blade 141 corresponding to the exhaust fan 41 opens to allow air to pass smoothly. In the case where the shielding component uses a blind 14, the size of the blind 14 can be larger than the size of the exhaust fan 41. In other embodiments, the fan 4 can also be a blower located on the air inlet side of the air duct, or the fan 4 can be set at other positions in the air duct, which can also realize the air intake of the air inlet 11 and discharge from the air outlet 12 after flowing through the air duct. The specific setting can be based on factors such as the overall layout of the unit. The corresponding air outlet portion may adopt a box structure or a tubular structure with an outlet.

[0057] In some embodiments, a slide rail 15 is provided on the housing 1, and the air outlet is provided on the slide rail 15 and can slide along the slide rail 15. It is understandable that the slide rail 15 is provided in the vertical direction, so that the slide rail 15 can limit and guide the movement of the air outlet, making it more stable.

[0058] In some embodiments, the evaporative condenser unit further includes a lifting drive component, the output end of which is connected to the air outlet to drive the air outlet to rise and fall. The lifting drive component can automatically adjust the height of the air outlet, so that according to the rotation speed of the fan 4, the lifting drive component drives the air outlet to rise and fall accordingly. Specifically, when the rotation speed of the fan 4 increases, the lifting drive component lowers the height of the air outlet 12; when the rotation speed of the fan 4 decreases, the lifting drive component raises the height of the air outlet 12. In other embodiments, the height of the air outlet can also be manually adjusted. For example, after moving it to a suitable height, the air outlet can be maintained at the current height by a locking component such as a lock.

[0059] In some embodiments, the lifting drive component includes a lifting motor, specifically a stepper motor. The motor drives the air outlet to rise and fall, and the motor can be connected to the air outlet via a screw rod, providing high control precision. In other embodiments, the lifting drive component can also include a telescopic cylinder, such as a pneumatic cylinder or a hydraulic cylinder.

[0060] In some embodiments, the lifting drive component includes an electromagnet and a permanent magnet. One of the air outlet and the housing 1 is provided with an electromagnet, and the other is provided with a permanent magnet. The magnetic force between the electromagnet and the permanent magnet is used to drive the air outlet to rise. The descent of the air outlet can rely on its own gravity. The magnitude and direction of the magnetic force between the electromagnet and the permanent magnet can be adjusted by controlling the magnitude and direction of the current of the electromagnet. Specifically, the electromagnet or the permanent magnet is arranged at the top of the strip window 13. When it is necessary to drive the air outlet to rise, the electromagnet is energized and generates a magnetic attraction with the permanent magnet, thereby adsorbing the air outlet to a set position. When the height of the air outlet needs to be lowered, the electromagnet can be de-energized, and the air outlet automatically falls due to gravity.

[0061] In some embodiments, the spray device 3 is disposed above the condenser 2, with the spray outlet 31 of the spray device 3 facing downward. The air inlet 11 is disposed on a side wall of the housing 1, and the air outlet 12 is disposed on an opposite side wall of the housing 1, so that the air flow direction of the air path is orthogonal to the spray direction of the spray device 3.

[0062] In some embodiments, the spray device 3 is arranged below at least part of the condenser 2 and the spray outlet 31 of the spray device 3 is arranged upward. It can be understood that the partial condenser 2 includes both a multi-layer arrangement of the condenser 2 coils, and the spray device 3 is arranged below the topmost coil or any layer of coils below it, and also includes at least two condensers 2 distributed along the vertical interval in the shell 1, and the spray device 3 is arranged below the topmost condenser 2 or any condenser 2 below it. As set up above, the corresponding condenser 2 at least partially located above the spray device 3 forms a bottom-up spraying mode, and the wind flow direction is horizontal, so that the wind path formed is the shortest, and the wind resistance loss is minimized, which is conducive to improving the heat exchange efficiency of the evaporative condenser unit. In addition, the orthogonal method also avoids the problem that part of the wind flow brought by the arc flow path cannot effectively enter the condenser 2 space due to the centrifugal force, resulting in uneven heating of the condenser 2.

[0063] In some embodiments, the spray device 3 is positioned below the integral condenser 2, with the spray outlet 31 of the spray device 3 facing upward. The air inlet 11 is positioned on one side of the housing 1, and the air outlet 12 is positioned on the opposite side of the housing 1. This creates a bottom-up spray pattern, with the air flowing horizontally. The spray device 3 is positioned below the integral condenser 2, with minimal or no components underneath. This facilitates maintenance during use, such as replacing the spray device 3 with a new one or removing it for repair.

[0064] In some embodiments, 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 air inlet 11 as an example, which is located on the left side of the shell 1, in order to avoid the left side pipe 7 of the condenser 2 blocking the right side pipe 7, the condenser 2 preferably adopts a sparse left and dense right structure, that is, the distribution density of the heat dissipation structure such as the heat pipe 21 and the heat dissipation fin of the condenser 2 adopts a method in which the density of the heat dissipation structure is large on the left side near the air inlet 11 and small on the right side near the air outlet 12. The specific heat dissipation structure density can be set to gradually decrease from left to right. In this embodiment, the setting of the air inlet 11 and the air outlet 12, and the setting of the spray device 3 can refer to the above embodiments and will not be repeated here. It can be understood that for the right side air intake method, the corresponding setting is that the heat dissipation structure density on the right side of the condenser 2 is less than the heat dissipation structure density on the left side.

[0065] 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.

[0066] In some embodiments, a liquid collecting trough 5 is further provided at the bottom of the housing 1 to receive the falling spray liquid. The provision of the liquid collecting 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.

[0067] 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 6. The liquid pump 6 pumps the spraying liquid in the liquid tank to the spraying device 3.

[0068] In some embodiments, a water retainer 8 is further provided 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.

[0069] The present application also provides a method for controlling the height of an air outlet of an evaporative condenser unit, which is used for any of the evaporative condenser units in the above embodiments. In one embodiment, the method for controlling the height of an air outlet comprises the following steps:

[0070] S1: Get the fan speed;

[0071] S2: Adjust the height of the air outlet according to the speed of the fan.

[0072] In this embodiment, the height of the air outlet is not fixed but is adjusted according to the fan speed. By applying the air outlet height control method for an evaporative condenser unit provided by the present invention, the air flow direction is orthogonal to the spray direction, minimizing the air path and thus reducing windage losses, which is beneficial for improving the heat exchange efficiency of the evaporative condenser unit. Furthermore, the air outlet height is adjusted accordingly with the fan speed to better remove the heat from the evaporating steam, further reducing real-time windage and improving the real-time energy efficiency of the evaporative condenser unit.

[0073] In some embodiments, step S2 specifically includes:

[0074] When the fan speed increases, the height of the air outlet is lowered; when the fan speed decreases, the height of the air outlet is raised.

[0075] That is, the fan speed is inversely related to the height of the air outlet. Figure 5 When the fan speed is high, the corresponding airflow speed is fast, Q = V * S, where Q is the air volume, V is the airflow speed, and S is the inlet area or windward area. The component of the resultant force of the outlet wind direction in the direction of the air inlet accounts for a larger proportion, and the air inlet, heat exchanger, and air outlet are closer to collinearity; when the fan speed is low, the corresponding airflow speed is slow. At this time, the evaporation buoyancy accounts for a relatively larger proportion in the direction of the resultant force of the outlet wind direction, and the ideal air outlet should be moved upward. In other words, the higher the fan speed, the smaller the impact of the buoyancy of the evaporated steam on the airflow, so the required air outlet height is correspondingly lower. The specific air outlet height corresponding to a specific fan at different speeds can be obtained by reading a pre-stored correspondence table of fan speed to air outlet height or a functional relationship between fan speed and air outlet height, wherein the functional relationship between fan speed and air outlet height can be obtained by data fitting.

[0076] In some embodiments, see Figure 6 , the air outlet height control method includes:

[0077] S21: The air outlet is set at a preset initial height;

[0078] S22: Determine whether the real-time load is not less than the target load. If so, execute step S23; otherwise, execute step S25;

[0079] S23: Reduce the speed of the fan;

[0080] S24: controlling the air outlet to rise to a corresponding height according to the reduction in the fan speed;

[0081] S25: Increase the speed of the fan;

[0082] S26: Control the air outlet to lower a corresponding height according to the increase in the fan speed.

[0083] The initial position of the air outlet is set at a preset initial height Hb, Hmax ≥ Hb ≥ Hc, where Hmax is the highest position of the air outlet and Hc is the lowest position of the air outlet. The air inlet height is set to Hin, Hc ≥ Hin. The real-time load is Pn, the target load is Pt, and the load is proportional to the fan speed. The real-time load Pn is determined to be no less than the target load Pt. If so, the fan speed is reduced and the air outlet height is increased accordingly. Otherwise, the fan speed is increased and the air outlet height is reduced accordingly. When the power is turned on, the evaporative condenser unit operates, the condensing load temperature continues to rise, the fan operates, and the fan speed is continuously adjusted toward the target value. The fan speed is adjusted according to the real-time load, and the air outlet height is adjusted accordingly to improve the real-time energy efficiency of the evaporative condenser unit.

[0084] In some embodiments, lowering the height of the air outlet when the fan speed increases specifically includes: lowering the height of the air outlet when the fan speed increases until the height of the air outlet is consistent with the height of the air inlet; raising the height of the air outlet when the fan speed decreases specifically includes: raising the height of the air outlet when the fan speed decreases until the maximum height of the air outlet is reached. In this embodiment, as the fan speed changes, the position of the air outlet is adjusted constantly or intermittently to correspond to the fan speed. Specifically, when the evaporative condenser unit loses power, the air outlet returns to a preset initial height.

[0085] In some embodiments, the air outlet height control method further includes: when the fan speed is maintained within a preset speed range, controlling the air outlet height to a preset initial height. That is, when the fan reaches a set target value and stabilizes, the air outlet position is adjusted to the preset initial height. The preset speed range can specifically be 40% to 85% of the fan's maximum speed. The preset initial height can specifically be between one-half and one-third of the distance from the highest position of the air outlet. Through the above-described configuration, the real-time energy efficiency of the evaporative condenser unit can be taken into account while also helping to reduce operating costs.

[0086] In some embodiments, the height of the air outlet can also be adjusted in combination with at least one of the flow rate of the spray device, the flow length and flow resistance of the condenser, and the distance between the air inlet and the air outlet.

[0087] 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.

[0088] 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 spray port of the spray device (3) is arranged upward or downward, and an air inlet (11) and an air outlet (12) are respectively provided on opposite sides of the shell (1), the top of the shell (1) is closed, and the height of the air outlet (12) on the shell (1) is adjustable, 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); A strip window (13) is provided on the housing (1), and a shielding component is provided on the strip window (13) to seal different parts of the strip window (13), and the open part of the strip window (13) forms the air outlet (12).

2. The evaporative condenser unit according to claim 1, characterized in that: The shielding assembly comprises a shutter (14), wherein the shutter (14) has a plurality of blades (141) arranged in sequence along a vertical direction, and each blade (141) is rotatably connected to the housing (1) to be opened or closed.

3. The evaporative condenser unit according to claim 2, characterized in that: The shielding assembly further comprises a plurality of shielding drive components, and the output end of each shielding drive component is respectively connected to at least one corresponding fan blade (141) to drive the corresponding fan blade (141) to close or open.

4. The evaporative condenser unit according to any one of claims 1 to 3, characterized in that: It also includes an air outlet portion slidably mounted on the housing (1), and the air outlet portion corresponds to the strip-shaped window (13).

5. The evaporative condenser unit according to claim 4, characterized in that: The air outlet portion is an exhaust fan (41).

6. The evaporative condenser unit according to claim 4, characterized in that: A slide rail (15) is provided on the housing (1), and the air outlet is provided on the slide rail (15) and is capable of sliding along the slide rail (15).

7. The evaporative condenser unit according to claim 4, characterized in that: It also includes a lifting drive component, the output end of which is connected to the air outlet to drive the air outlet to move up and down.

8. The evaporative condenser unit according to claim 7, characterized in that: The lifting drive component includes a lifting motor; or, The lifting drive component comprises an electromagnet and a permanent magnet; one of the air outlet and the shell (1) is provided with the electromagnet, and the other is provided with the permanent magnet; the magnetic force between the electromagnet and the permanent magnet is used to drive the air outlet to rise.

9. A method for controlling the air outlet height of an evaporative condenser unit, used for the evaporative condenser unit according to any one of claims 1 to 8, characterized in that: include: Obtaining the rotation speed of the fan; The height of the air outlet is adjusted according to the rotation speed of the fan.

10. The air outlet height control method according to claim 9, characterized in that: Adjusting the height of the air outlet according to the rotation speed of the fan specifically includes: When the rotation speed of the fan increases, the height of the air outlet is lowered; when the rotation speed of the fan decreases, the height of the air outlet is raised.

11. The air outlet height control method according to claim 10, characterized in that: Also includes: The air outlet is set at a preset initial height; When the speed of the fan increases, the height of the air outlet is lowered; when the speed of the fan decreases, the height of the air outlet is raised, specifically including: determining whether the real-time load is not less than the target load; if so, reducing the speed of the fan, and controlling the air outlet to rise to a corresponding height according to the reduction in the fan speed; Otherwise, the rotation speed of the fan is increased, and the air outlet is controlled to be lowered to a corresponding height according to the increase in the rotation speed of the fan.

12. The air outlet height control method according to claim 11, characterized in that: Also includes: When the rotation speed of the fan is maintained within a preset rotation speed range, the height of the air outlet is controlled to be the preset initial height.

13. The air outlet height control method according to claim 10, characterized in that: When the speed of the fan increases, the height of the air outlet is lowered, specifically comprising: When the speed of the fan increases, the height of the air outlet is lowered until the height of the air outlet is consistent with the height of the air inlet; When the speed of the fan decreases, the height of the air outlet is increased, specifically comprising: When the rotation speed of the fan decreases, the height of the air outlet is increased until the maximum height of the air outlet is reached.

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