Active cooling device and control method thereof

Abstract

The application provides an active cooling device and a control method thereof. The active cooling device comprises a base plate, a wet curtain, a water distributor and a fan. The base plate is provided with a receiving groove. The lower end of the wet curtain is connected to the receiving groove. The water distributor is connected to the upper end of the wet curtain. The water distributor is provided with a water inlet and a guide groove in communication with the water inlet. The guide groove is gradually inclined downward from one end close to the water inlet to the other end. The bottom wall of the guide groove is provided with a drain hole. The water flowing into the guide groove from the water inlet flows to the wet curtain through the drain hole. The water distributor is also provided with a ventilation opening. The fan is arranged inside the wet curtain and is used to drive the external air to flow through the wet curtain and then be discharged from the ventilation opening. The water flowing into the guide groove flows along the inclined surface under the guidance of gravity and spreads over the entire guide groove. Then, the water spreading over the water channel flows to the wet curtain through the drain hole. The problem of uneven wetting of the wet curtain is solved, so that the contact heat exchange efficiency of water and air and the overall cooling effect are improved.

Description

Technical Field

[0001] This invention relates to the field of fan cooling technology, and more specifically to an active cooling device and its control method. Background Technology

[0002] The fan-cooled evaporative cooling device is a device that uses the principle of water evaporation to absorb heat and is widely used in places such as greenhouses and factories that require ventilation, cooling and air conditioning. Its core principle is to let the air flow through the moist evaporative cooling pad, and the water film of the evaporative cooling pad will evaporate and take away the heat, thereby reducing the air temperature.

[0003] However, most common fan-cooled evaporative cooling devices suffer from uneven evaporation of the evaporative pads.

[0004] For example, patent application number CN202122658338.4 discloses a fan-cooled evaporative cooling device, including a bracket and an evaporative curtain. The bracket is fixedly mounted on the wall surface at intervals. A fixed frame is fixedly connected to the outside of the evaporative curtain. Rotating shafts are fixedly connected to the lower ends of both sides of the fixed frame. Rotating grooves are opened in the side of the two sets of brackets that are close to each other. The two sets of rotating shafts are respectively connected to the two sets of rotating grooves. Two sets of first sliding grooves and two sets of second sliding grooves are opened in the back of the fixed frame. Two sets of electric push rods are fixedly mounted on the wall surface by bolts. The output end of the electric push rod is fixedly connected to a movable rod. This fan-cooled evaporative cooling device realizes the rotation of the fixed frame and the evaporative curtain through the cooperation of the electric push rod, the movable rod and the limiting steel ball. Cooling water is sprayed out through the atomizing nozzle through the liquid inlet pipe and the liquid delivery channel.

[0005] For example, patent application number CN201922370472.7 discloses a wet curtain cooling device, including a wet curtain group, which includes a left wet curtain, a right wet curtain and several intermediate wet curtains. The left wet curtain, the right wet curtain and the several intermediate wet curtains are respectively provided with partitions. The left wet curtain, the right wet curtain and the several intermediate wet curtains are respectively connected to a water inlet pipe and a water return pipe. In addition, water in the sprinkler pipe flows out to the wet curtain body through micropores, and the side plate can ensure that all water is immersed in the wet curtain body.

[0006] In other words, existing cooling devices often lack a reasonable water distribution structure design, typically using a spray method to wet the evaporative cooling pad. This makes it difficult to distribute the water evenly across the pad's surface, resulting in inconsistent moisture levels throughout. This uneven moisture distribution not only reduces the heat exchange efficiency between water and air, affecting the overall cooling effect, but may also cause some water to be discharged without sufficient evaporation, wasting water resources and increasing indoor humidity, thus impacting the user experience. Summary of the Invention

[0007] The purpose of this invention is to overcome the defects of the prior art and provide an active cooling device and its control method to solve the technical problem that existing cooling devices are unable to uniformly wet the cooling pad.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides an active cooling device, comprising: The chassis is provided with a receiving groove; A wet curtain, the lower end of which is connected to the receiving groove; A water distributor is connected to the upper end of the wet curtain. The water distributor has a water inlet and a guide channel communicating with the water inlet. The guide channel gradually slopes downward from one end near the water inlet to the other end, and the bottom wall of the guide channel has a drain hole. Water flowing from the water inlet into the guide channel flows through the drain hole to the wet curtain. The water distributor also has a ventilation opening. A fan is located inside the wet curtain and is used to drive outside air to flow through the wet curtain and then be discharged from the vent.

[0009] In one embodiment, the number of drainage holes is at least two, and all drainage holes are arranged along the extension direction of the guide groove.

[0010] In one embodiment, the inclination angle of the guide groove is 4° to 6°.

[0011] In one embodiment, the water distributor is further provided with a buckle assembly, and the wet curtain is engaged with the buckle assembly.

[0012] In one embodiment, an overflow outlet is provided at the end of the guide channel away from the water inlet, and the overflow outlet is used to overflow water to the chassis when the water level in the guide channel reaches a preset value.

[0013] In one embodiment, the chassis is further provided with a water outlet for discharging water outside the chassis.

[0014] In one embodiment, the active cooling device further includes: at least two side plates; the lower end of the side plates is fixedly connected to the chassis, and the water distributor is fixedly connected to the upper end of the side plates; there is a gap between adjacent side plates, and the water distributor, all the side plates and the chassis form an accommodating space, and the wet curtain is disposed in the accommodating space.

[0015] In one embodiment, the active cooling device further includes: an outlet air temperature sensor and an indoor temperature sensor; the outlet air temperature sensor is located outside the vent and is used to detect the outlet air temperature; the indoor temperature sensor is located inside the room and is used to detect the indoor ambient temperature.

[0016] In one embodiment, the active cooling device further includes an airflow sensor; the airflow sensor is located outside the vent and is used to detect the airflow volume.

[0017] Secondly, the present invention provides a control method for an active cooling device, applied to the aforementioned active cooling device, comprising the following steps: Receive cooling commands and obtain the user-set temperature; The outlet air temperature and indoor ambient temperature of the active cooling device are obtained; Calculate the difference between the outlet air temperature and the indoor ambient temperature and record it as the first difference; calculate the difference between the indoor ambient temperature and the temperature set by the user and record it as the second difference. When the first difference is detected to be as high as a preset first threshold, it is determined that the active cooling device is in a high-temperature environment, and the water inlet flow rate is increased and the fan speed is increased. The first difference is detected at a preset time interval. When the first difference decreases to a preset second threshold and the second difference reaches a preset third threshold, the water inflow and the fan speed are reduced simultaneously.

[0018] The beneficial effects of this invention compared with the prior art are as follows: By setting the guide channel of the water distributor to a structure that gradually slopes downward from one end near the water inlet to the other end, the water flow enters the guide channel and flows rapidly along the inclined surface under the guidance of gravity, filling the entire guide channel, thus avoiding the water flow from only accumulating locally below the water inlet; subsequently, the water flow filled with water channels flows to the wet curtain through several drainage holes, improving the problem of uneven wetting of the wet curtain, thereby greatly improving the contact heat exchange efficiency between water and air and the overall cooling effect.

[0019] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other objects, features and advantages of the present invention more obvious and understandable, preferred embodiments are described in detail below. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of an active cooling device provided by the present invention; Figure 2 This is an exploded structural diagram of an active cooling device provided by the present invention; Figure 3 This is a side view of the water distributor of an active cooling device provided by the present invention; Figure 4 A bottom view of the water distributor of an active cooling device provided by the present invention; Figure 5 A bottom view of the assembled structure of the water distributor, fan and air outlet grille of the active cooling device provided by the present invention; Figure 6A schematic diagram of the temperature change of a 3.5mm high wet curtain in an active cooling device provided by the present invention under different rotation speeds and humidity levels; Figure 7 A schematic diagram showing the temperature change of a 5mm high wet curtain in an active cooling device provided by the present invention under different rotation speeds and humidity levels. Figure 8 A schematic diagram comparing the air volume of a 3.5mm wave height and a 5mm wave height wet curtain as a function of fan speed in an active cooling device provided by the present invention. Figure 9 This is a flowchart illustrating a control method for an active cooling device provided by the present invention.

[0021] Figure label: 1. Chassis; 11. Receptacle; 12. Outlet; 2. Wet curtain; 3. Water distributor; 31. Inlet; 32. Guide channel; 33. Drain hole; 34. Ventilation opening; 35. Clip assembly; 351. First clip; 352. Second clip; 36. Overflow outlet; 4. Fan; 5. Side panel; 6. Air outlet grille. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0023] It should be understood that, when used in this specification and the appended claims, the terms “comprising” and “including” indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0024] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0025] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0026] Example 1 See Figures 1-8 As shown, this embodiment discloses an active cooling device, which includes: a chassis 1, a wet curtain 2, a water distributor 3, and a fan 4; the chassis 1 is provided with a receiving groove 11; the lower end of the wet curtain 2 is connected to the receiving groove 11; the water distributor 3 is connected to the upper end of the wet curtain 2, and the water distributor 3 is provided with a water inlet 31 and a guide groove 32 communicating with the water inlet 31. The guide groove 32 gradually slopes downward from one end near the water inlet 31 to the other end, and the bottom wall of the guide groove 32 is provided with a drain hole 33. Water flowing into the guide groove 32 from the water inlet 31 flows through the drain hole 33 to the wet curtain 2; the water distributor 3 is also provided with a vent 34; the fan 4 is located inside the wet curtain 2 and is used to drive the outside air to flow through the wet curtain 2 and then be discharged from the vent 34.

[0027] Understandably, the wet curtain 2 is usually made of paper honeycomb structure material, but it can also be made of porous water-absorbing materials such as plastic honeycomb structure, plant fiber, glass fiber, and optical fiber. Water flows from top to bottom on the wet curtain 2 under the action of gravity, and can form a water film on the corrugated fiber surface of the wet curtain 2. When the fast-flowing air passes through the wet curtain 2, the water in the water film will absorb the heat in the air and evaporate, taking away a large amount of heat, so that the temperature of the air passing through the wet curtain 2 is reduced, thereby achieving a certain cooling purpose.

[0028] When the active cooling device in this embodiment is working, water enters the guide channel 32 of the water distributor 3 from the inlet 31. Under the action of gravity, it flows from the inlet 31 end to the other end along the inclined slope of the guide channel 32, simultaneously filling the cavity space of the entire guide channel 32, so that a uniform water pressure is formed in all parts of the guide channel 32. Under the action of its own gravity and water pressure, the water flows evenly from the drain hole 33 on the bottom wall of the guide channel 32 to the top of the wet curtain 2 below, and wets the entire surface of the wet curtain 2 from top to bottom along the fiber structure of the wet curtain 2 to form a water film. At the same time, the fan 4 starts to generate negative pressure, driving the outside air through the wet curtain 2. The air and the water film on the surface of the wet curtain 2 come into full contact, and the water evaporates and absorbs the heat in the air to achieve cooling. The cooled airflow is discharged from the vent 34.

[0029] Understandably, the inclined guide channel 32 utilizes the physical properties of gravity-driven flow, breaking the limitation of the horizontal guide channel 32 relying solely on water pressure to diffuse the water flow. After the water enters the guide channel 32, it generates continuous flow potential energy along the inclined surface of the bottom wall of the guide channel 32, quickly filling from the inlet 31 end to the end of the guide channel 32. This reduces the dead zone of water flow within the guide channel 32, making the water level height approximately the same at all points along the guide channel 32, thus providing uniform outlet pressure for the drain hole 33. Therefore, the water distribution structure of the inclined guide channel 32 combined with the drain hole 33 improves the problems of local water accumulation and uneven water distribution, ensuring uniform wetting of the wet curtain 2 and improving evaporative heat exchange efficiency.

[0030] As described above, the active cooling device of this embodiment sets the guide channel 32 of the water distributor 3 to a structure that gradually slopes downward from one end near the water inlet 31 to the other end. This allows the water to flow rapidly along the inclined surface and fill the entire guide channel 32 under the guidance of gravity after entering the guide channel 32, thus avoiding the water flow from only accumulating locally below the water inlet 31. Subsequently, the water flow filled with water channels flows through the drain hole 33 to the wet curtain 2, improving the problem of uneven wetting of the wet curtain 2, thereby greatly improving the contact heat exchange efficiency between water and air and the overall cooling effect.

[0031] In a further embodiment, the number of drainage holes 33 is at least two, and all drainage holes 33 are arranged along the extension direction of the guide groove 32.

[0032] Understandably, the design of multiple drainage holes 33 enables simultaneous water discharge from multiple points along the entire length of the guide channel 32, expanding the coverage area of ​​the water flow at the top of the wet curtain.

[0033] In a further embodiment, all drainage holes 33 are arranged at equal intervals along the extension direction of the guide groove 32.

[0034] Understandably, the equally spaced drainage holes 33 allow the water in the guide channel 32 to drip onto the top of the wet curtain 2 at the same interval under uniform water pressure. The dripping points are evenly distributed on the top of the wet curtain 2, and the water flows from each dripping point to both sides to soak and diffuse. The soaking areas of adjacent dripping points are connected to each other, eventually covering the entire top surface of the wet curtain 2, further ensuring the uniform soaking of the wet curtain 2.

[0035] In this embodiment, the diameter of each drain hole 33 is consistent. It is understood that in other feasible embodiments, the diameter of the drain holes 33 can be set to a gradual structure according to the tilt angle or actual needs, with the drain holes 33 at the inlet 31 having a slightly smaller diameter and the drain holes 33 at the end having a slightly larger diameter, to further improve the consistency of water output of each drain hole 33; the drain holes 33 can also be set to a structure of multiple rows of staggered arrangement to increase the distribution density of dripping points at the top of the wet curtain 2, adapting to the wetting requirements of the high-thickness wet curtain 2.

[0036] In a further embodiment, the tilt angle of the guide groove 32 is 4° to 6°.

[0037] Understandably, an inclination angle of 4° to 6° provides appropriate gravitational potential energy for the water flow within the guide channel 32. This ensures that the water flows smoothly along the guide channel 32 and fills the entire channel, creating a stable and uniform water level layer within the guide channel 32. It avoids problems such as excessively fast water flow velocity, unstable water level within the guide channel 32, and uneven water pressure at each drain hole 33 caused by an excessively large inclination angle. Simultaneously, this angle range is compatible with conventional water distributor 3 manufacturing processes and installation space, preventing excessive overall thickness of the water distributor 3 and ensuring the compactness of the device structure.

[0038] It is understood that in other embodiments, the tilt angle can be adjusted according to the volume or size of the water distributor 3. For example, when the extension length of the guide channel 32 of the water distributor 3 is long, the tilt angle can be increased to improve the water flow filling efficiency of the long guide channel 32; when the extension length of the guide channel 32 of the water distributor 3 is short, the tilt angle can be reduced to ensure the water level stability in the short channel; multiple channels with different tilt angles can also be set in the guide channel 32 to adapt to the water distribution layout of multiple sets of inlets 31.

[0039] In a further embodiment, see Figure 2 As shown, the water distributor 3 is also equipped with a buckle assembly 35, and the wet curtain 2 is snapped into the buckle assembly 35.

[0040] Based on the above design, in practical applications, the evaporative cooling pad 2 and the water distributor 3 can be connected via a snap-fit ​​mechanism 35. During installation, the upper end of the evaporative cooling pad 2 is directly pushed into the snap-fit ​​position of the snap-fit ​​mechanism 35. The snap-fit ​​mechanism 35 elastically deforms and then resets, providing bidirectional positioning for the evaporative cooling pad 2. This stably fixes the upper end of the evaporative cooling pad 2 to the corresponding position on the water distributor 3, ensuring a stable distance between the top surface of the evaporative cooling pad 2 and the drain hole 33 of the water distributor 3. This guarantees that the water dripping from the drain hole 33 accurately falls onto the evaporative cooling pad 2. Furthermore, the snap-fit ​​mechanism 35 enables rapid assembly and disassembly of the evaporative cooling pad 2, improving the efficiency of the assembly and disassembly of the device.

[0041] In a further embodiment, see Figure 2 and Figure 4 As shown, the buckle assembly 35 includes: a first buckle 351 and a second buckle 352; the first buckle 351 is disposed on the side wall of the water distributor 3, and the second buckle 352 is disposed on the bottom of the water distributor 3. The distance between the first buckle 351 and the second buckle 352 is slightly greater than the upper width of the wet curtain 2; the upper end of the wet curtain 2 is engaged between the first buckle 351 and the second buckle 352.

[0042] Understandably, the first clip 351 and the second clip 352 respectively form a bidirectional limiting structure on the wet curtain 2 from both sides of the wet curtain 2. During installation, the upper end of the wet curtain 2 is inserted into the gap between the first clip 351 and the second clip 352. The two cooperate to form a stable clamping and limiting structure, preventing the wet curtain 2 from shifting left or right, and firmly fixing the upper end of the wet curtain 2 in the preset position.

[0043] In a further embodiment, the number of snap-fit ​​components 35 is at least two, and the distribution of all snap-fit ​​components 35 is adapted to the shape of the wet curtain 2.

[0044] Understandably, multiple snap-fit ​​components 35 are distributed at intervals along the outer contour of the wet curtain 2, or the wet curtain 2 is bent and extended along the distribution direction of multiple snaps. Both can form multi-point synchronous limiting at the upper end of the wet curtain 2. Each snap-fit ​​component 35 independently clamps and fixes the corresponding area of ​​the wet curtain 2, so that each area at the upper end of the wet curtain 2 is subjected to a stable limiting force, ensuring that the overall fit between the wet curtain 2 and the water distributor 3 is consistent, and the distance between the top surface of the wet curtain 2 and the drain hole 33 remains uniform across the entire width. This also avoids the problem of warping and deformation of the wet curtain 2 caused by single-point fixing, thus ensuring the service life of the device.

[0045] It is understood that in other embodiments, the snap-fit ​​assembly 35 can be configured as an integral continuous snap-fit ​​structure that extends along the entire upper edge of the wet curtain 2 to form a continuous clamping and fixing of the wet curtain 2, thereby further improving the sealing and stability of the wet curtain 2 installation.

[0046] In a further embodiment, see Figure 2 As shown, the end of the guide channel 32 away from the inlet 31 is provided with an overflow outlet 36. The overflow outlet 36 is used to overflow water to the chassis 1 when the water level in the guide channel 32 reaches a preset value. The height between the lower edge of the overflow outlet 36 and the bottom wall of the guide channel 32 is the preset value of the water level in the guide channel 32.

[0047] Understandably, when the drain hole 33 in the guide channel 32 becomes blocked, or when the inflow exceeds the maximum drainage capacity of the drain hole 33, the water level in the guide channel 32 continues to rise. When the water level reaches the height of the lower edge of the overflow port 36, the excess water flows out from the overflow port 36 and falls along the guide path or directly into the receiving groove 11 of the chassis 1. This prevents the water level in the guide channel 32 from overflowing from the edge of the water distributor 3, which could lead to water leakage or localized over-wetting of the wet curtain 2. Therefore, the overflow port 36 provides overload overflow protection for the water distributor 3 and limits the maximum water level in the guide channel 32, ensuring that the water level in the guide channel 32 remains within a stable range, further ensuring uniform water pressure at each drain hole 33.

[0048] It is also understandable that the evaporative cooling pad 2 is positioned directly opposite the guide trough 32, with the overflow outlet 36 located at the end of the guide trough 32. The overflowing water falls directly onto the chassis 1 without contacting the evaporative cooling pad 2, thus not changing its wetness. In practical applications, a guide hose can be connected to the overflow outlet 36 to direct the overflowing water to the outlet 12 of the chassis 1, preventing the overflowing water from dripping onto the evaporative cooling pad 2 and causing localized over-wetting.

[0049] In a further embodiment, the active cooling device also includes: a water pump and a water storage tank (not shown); the outlet of the water pump is connected to the inlet 31 through a pipe, and the water flow rate of the guide trough 32 is adjusted by adjusting the voltage of the water pump; the inlet of the water pump is connected to the water storage tank, and the water pump is used to pump the water in the water storage tank into the water distributor 3 to wet the wet curtain 2.

[0050] Understandably, when the water pump is running, it draws water from the storage tank and delivers it through pipes to the inlet 31 of the water distributor 3, providing a continuous water supply to the water distributor 3. By adjusting the input voltage of the water pump, the output power of the water pump can be adjusted accordingly, thereby changing the water flow rate of the water pump and adjusting the water intake of the guide trough 32 to match the evaporation requirements of the wet curtain 2. The design of the water pump allows the water intake to be flexibly adjusted according to the cooling requirements during use, avoiding problems such as excessively wet wet curtain 2 and excessive indoor humidity due to excessive water intake, or insufficient water intake leading to dry wet curtain 2 and insufficient cooling effect.

[0051] In a further embodiment, see Figures 1-2 As shown, the chassis 1 is also provided with a water outlet 12, which is used to discharge water out of the chassis 1.

[0052] Understandably, water that is not absorbed or evaporated by the evaporative cooling pad 2 drips downwards along the fiber structure of the evaporative cooling pad 2 into the receiving tank 11 of the chassis 1. After collecting in the receiving tank 11, it is discharged from the outlet 12 on the chassis 1 to the outside of the device, preventing the water level in the receiving tank 11 from becoming too high and overflowing the chassis 1, while also preventing water from stagnating in the receiving tank 11 for a long time, thus preventing the growth of bacteria and the generation of odors. Therefore, the outlet 12 enables the timely discharge of water accumulated in the chassis 1, ensuring the cleanliness of the device operation and avoiding problems such as water leakage and dampness in the surrounding environment caused by water overflow.

[0053] In practical applications, the water outlet 12 can be set at the lowest point of the receiving groove 11 of the chassis 1, and the bottom wall of the receiving groove 11 can be set as a slope that is inclined towards the water outlet 12 to ensure that the accumulated water can be completely discharged and to avoid residual water.

[0054] In a further embodiment, the outlet 12 is connected to the water storage tank via a pipe.

[0055] Based on the above design, the water collected in the accommodating tank 11 of the chassis 1 flows out from the outlet 12 and then flows back to the water storage tank through the pipe so that it can be pumped out again and transported to the water distributor 3, forming a complete cooling water circulation loop, realizing the reuse of water resources, reducing the frequency of water replenishment, and reducing the operating cost of the device.

[0056] In a further embodiment, see Figures 1 to 2 As shown, the active cooling device also includes: at least two side plates 5; the lower end of the side plate 5 is fixedly connected to the chassis 1, and the water distributor 3 is fixedly connected to the upper end of the side plate 5; there is a gap between adjacent side plates 5, and the water distributor 3, all side plates 5 and chassis 1 form an accommodating space, and the wet curtain 2 is set in the accommodating space.

[0057] Understandably, the side plate 5 serves as a supporting structure, forming a stable supporting frame between the chassis 1 and the water distributor 3, and together with the chassis 1, constitutes the shell structure of the device, ensuring the safety of other internal components. The upper and lower ends of the side plate 5 are fixedly connected to the water distributor 3 and the chassis 1, respectively, ensuring the relative position of the water distributor 3 and the chassis 1 is stable, thereby ensuring that the upper and lower ends of the wet curtain 2 are in a stable positioning state; and the spacing between adjacent side plates 5 can form an air inlet channel, allowing outside air to enter the accommodating space through this channel, pass through the wet curtain 2, and complete heat exchange and cooling.

[0058] It is also understandable that, among other feasible methods, side panel 5 could be set as a heat insulation board to prevent heat exchange between the containment space and the external environment, thereby further improving the cooling effect.

[0059] In a preferred embodiment, all side panels 5 are rotationally symmetrical about the center of the chassis 1.

[0060] Understandably, the rotationally symmetrically distributed side plates 5 form a uniform support structure around the chassis 1, so that the supporting force on the water distributor 3 is evenly distributed around the circumference, avoiding deformation caused by uneven force on the water distributor 3; at the same time, the air inlet channels between adjacent side plates 5 are evenly distributed around the circumference, and the outside air enters the accommodating space from all directions around the circumference, passes through the wet curtain 2 area adjacent to the side plate 5, and ensures that the airflow velocity in the wet curtain 2 area adjacent to the side plate 5 is uniform, further improving the overall cooling effect.

[0061] In a further embodiment, see Figure 2 As shown, the wet curtain 2 is bent into a semi-enclosed shape with openings at the top and bottom and one side, forming an air duct with one of the side panels 5. The air duct is connected to the ventilation opening 34.

[0062] Understandably, the semi-enclosed evaporative cooling pad 2 and the side plate 5 enclose the air duct, with the upper end connected to the vent 34 of the water distributor 3 and the lower end corresponding to the receiving groove 11 of the chassis 1. When the fan 4 is running, it generates negative pressure in the air duct. Outside air enters the air duct from the outside of the evaporative cooling pad 2 through the wall of the evaporative cooling pad 2. During the process of passing through the evaporative cooling pad 2, it exchanges heat with the water film on the surface of the evaporative cooling pad 2 and cools down. The cooled airflow flows upward along the air duct and is finally discharged from the vent 34 of the water distributor 3. At the same time, the semi-enclosed structure facilitates the removal of the side plate 5 to maintain the internal structure of the air duct and also facilitates the installation and use of the device against the wall.

[0063] Understandably, in other feasible methods, the evaporative cooling pad 2 can also be bent into a cylindrical shape with openings at the top and bottom to form an enclosed air duct, which is connected to the ventilation opening 34. The cylindrical evaporative cooling pad 2 forms a circumferentially closed columnar air duct, with the upper end of the duct connected to the ventilation opening 34 of the water distributor 3. When the fan 4 is running, it generates negative pressure in the air duct, allowing outside air to pass evenly through the wall of the evaporative cooling pad 2 from the entire circumference of the cylindrical evaporative cooling pad 2 into the air duct. This air then exchanges heat with the water film around the entire circumference of the evaporative cooling pad 2, resulting in cooling. The cooled airflow then flows upward along the columnar air duct and is discharged from the ventilation opening 34. The cylindrical evaporative cooling pad 2 achieves circumferential air intake and heat exchange, maximizing the use of the circumferential space of the device and significantly increasing the heat exchange area of ​​the evaporative cooling pad 2. At the same time, the uniform circumferential air intake ensures consistent wetting and heat exchange efficiency in all areas of the evaporative cooling pad 2, further improving the overall cooling effect of the device.

[0064] Understandably, in other feasible methods, the wet curtain 2 can also be configured as a multi-segment splicing structure and enclosed with multiple side panels 5 to form an air duct, which facilitates replacement after a single segment is damaged and reduces maintenance costs.

[0065] In a further embodiment, the guide groove 32 is arranged in a circular or arc shape on the water distributor 3.

[0066] Understandably, the annular or arc-shaped guide channel 32 extends along the contour of the water distributor 3. After water enters the guide channel 32 from the inlet 31, it flows continuously along the inclined annular / arc-shaped channel under the action of gravity, quickly filling the entire cavity of the guide channel 32. This creates a uniform and stable water level along the entire length of the guide channel 32. Under equal water pressure, each drain hole 33 at the bottom of the channel simultaneously drips water evenly onto the top of the corresponding annular / arc-shaped wet curtain 2, achieving water distribution that matches the shape of the wet curtain 2. Furthermore, the annular / arc design of the guide channel 32 adapts to the water distribution needs of cylindrical and semi-enclosed curved wet curtains 2, eliminating the dripping blind spots that occur when the straight guide channel 32 distributes water to irregularly shaped wet curtains 2, ensuring uniform wetting of the wet curtain 2 around its entire circumference, and improving the compactness and space utilization of the device structure.

[0067] In a further embodiment, see Figure 5 As shown, the vent 34 is located at the center of the water distributor 3, and the fan 4 is located inside the vent 34.

[0068] Understandably, the vent 34 located at the center of the water distributor 3 corresponds to the center of the lower air duct. The fan 4 is installed inside the vent 34, which can directly generate a central negative pressure in the air duct when the fan 4 is running. This guides the cooling airflow in the air duct to flow upwards along the center and is discharged from the fan 4 inside the vent 34 into the working space. The airflow flows in a straight line along the center of the air duct, with the shortest path and the least wind resistance. At the same time, the structure of the fan 4 built into the vent 34 greatly improves the integration of the device, reduces the overall size of the device, and avoids the problem of excessive space occupation caused by external fan 4.

[0069] Preferably, the vent 34 can be configured as a flared structure, that is, the upper port diameter of the vent is larger than the lower port diameter, which can guide the airflow to diffuse and discharge, and expand the cooling coverage area.

[0070] Understandably, in other feasible configurations, the fan 4 can be positioned above the water distributor 3. When the fan 4 is positioned above the water distributor 3, the air inlet of the fan 4 connects to the vent 34 of the water distributor 3. When the fan 4 is running, it draws cooled airflow from the lower duct through the vent 34. The airflow enters the fan 4 from the duct through the vent 34, is pressurized by the fan 4, and is discharged from the air outlet of the fan 4, thus forming a negative pressure suction air supply structure. The external structure of the fan 4 facilitates its installation, disassembly, and maintenance.

[0071] In a further embodiment, see Figures 1 to 2 As shown, the active cooling device also includes: an air outlet grille 6; the air outlet grille 6 is located above the water distributor 3 and is fixedly connected to the water distributor 3 or the side plate 5.

[0072] Understandably, the air outlet grille 6 is positioned on the air outlet side of the vent 34. The cooling airflow delivered by the fan 4 is discharged through the gaps in the grille 6, and the grille bars guide the airflow while simultaneously shielding the vent 34 and fan 4, preventing external debris and dust from falling into them. It also prevents human contact with the operating fan 4, improving safety. Therefore, the design of the air outlet grille 6 achieves regular airflow guidance, preventing airflow turbulence from causing deviations in the air delivery range. It also provides safety protection for the device and can be used to decorate and cover the top of the device, enhancing its aesthetic appeal.

[0073] In a further embodiment, a sealing structure (not shown) is provided between the water distributor 3, the wet curtain 2, and the air outlet grille 6.

[0074] Understandably, the sealing structure fills the gaps between the water distributor 3 and the wet curtain 2, and between the water distributor 3 and the air outlet grille 6, forming a continuous sealing and isolation layer. This not only blocks the path of airflow short-circuiting through the gaps when the fan 4 is running, ensuring that the airflow can pass through the wet curtain 2 to complete heat exchange and cooling, but also prevents water from overflowing from the gaps in the water distributor 3, thus avoiding water dripping into areas other than the wet curtain 2.

[0075] In practical applications, silicone gaskets, silicone sealing rings, and foamed sealing strips can be used as sealing structures; or an integral injection-molded sealing rib can be set on the mating surface of the water distributor 3, which is interference-fitted with the mating surfaces of the wet curtain 2 and the air outlet grille 6; or a waterproof and anti-corrosion coating can be added to the surface of the sealing structure to extend the service life of the sealing structure and avoid aging failure caused by long-term contact with water vapor.

[0076] In a further embodiment, the fan 4 is mounted at the bottom of the air outlet grille 6.

[0077] Based on the above design, the air inlet of the fan 4 faces downwards and is directly opposite the ventilation port 34 of the water distributor 3, while the air outlet faces upwards and is directly opposite the grid area of ​​the air outlet grille 6. In addition, the fan 4 and the air outlet grille 6 are integrated and installed, eliminating the need for a separate fan 4 installation structure on the water distributor 3, simplifying the manufacturing process of the water distributor 3, and also facilitating the overall disassembly, maintenance, and replacement of the fan 4.

[0078] Understandably, in other feasible ways, the fan 4 can be installed on the water distributor 3, making the overall structural layout more compact and effectively reducing the overall height of the device.

[0079] In a further embodiment, the active cooling device further includes: an outlet air temperature sensor and an indoor temperature sensor (not shown); the outlet air temperature sensor is located outside the vent 34 and is used to detect the outlet air temperature; the indoor temperature sensor is located inside the room and is used to detect the indoor ambient temperature.

[0080] Understandably, the outlet air temperature sensor collects real-time temperature data of the cooled airflow discharged through vent 34, while the indoor temperature sensor collects real-time ambient temperature data within the target space. Both sensors transmit the collected temperature data to the device's control unit in real time. Based on this data, the control unit determines the cooling effect of the device and the changes in indoor temperature, providing data for adjusting the fan speed 4 and the water pump's water supply. Therefore, the design of the outlet air temperature sensor and the indoor temperature sensor enables real-time monitoring of the device's outlet air temperature and indoor ambient temperature, providing a data source for the device's active control. This allows the device to adjust its operating parameters in real-time based on the actual cooling effect and changes in indoor temperature, ensuring the indoor temperature remains stable within the user's desired range, thus improving the device's intelligence and user comfort.

[0081] In a further embodiment, the outlet air temperature sensor is disposed on the outer surface of the outlet grille 6.

[0082] Understandably, the outlet temperature sensor, located on the outer surface of the outlet grille 6, has its detection probe directly facing the outlet direction of the vent 34. The cooling airflow discharged from the fan 4 passes through the outlet grille 6 and flows directly through the detection probe, transmitting the data to the control unit to achieve real-time and accurate detection of the outlet temperature. Furthermore, this design avoids detection errors caused by the heat from the fan 4 and the moisture from the evaporative cooling pad 2 when the outlet temperature sensor is installed inside the duct. Simultaneously, the outlet temperature sensor's location on the outer surface of the outlet grille 6 facilitates installation, disassembly, calibration, and maintenance, allowing for repairs without disassembling the device.

[0083] In a further embodiment, the active cooling device also includes: an air volume sensor (not shown); the air volume sensor is located outside the vent 34 and is used to detect the air volume.

[0084] Understandably, the airflow sensor installed outside the vent 34 can detect the wind speed and airflow data of the airflow discharged from the vent 34 in real time, and transmit the detected real-time airflow data to the control unit. The control unit can determine the actual operating status of the fan 4 based on the real-time airflow data, providing accurate data basis for adjusting the speed of the fan 4. At the same time, it can combine the airflow data and temperature data to optimize the linkage control logic between the fan 4 and the water pump, further improving the energy efficiency and cooling effect of the device.

[0085] In a further embodiment, the air volume sensor is disposed on the outer surface of the air outlet grille 6.

[0086] Understandably, the airflow sensor, mounted on the outer surface of the air outlet grille 6, has its detection probe directly facing the direction of the airflow. The airflow passing through the air outlet grille 6 flows directly past the detection probe to collect airflow velocity data in real time and transmit the data to the control unit, achieving real-time detection of the airflow volume. Furthermore, based on the above design, it ensures that the airflow sensor can directly contact a stable airflow, avoiding the impact of eddies in the duct or fan 4 vibrations on detection accuracy, thus improving the accuracy and stability of airflow detection. It also facilitates the installation, disassembly, calibration, and maintenance of the airflow sensor, allowing for repair and replacement without disassembling the device.

[0087] It is understood that the corrugation height of the evaporative cooling pad in this embodiment is preferably 5mm. The following are the test results of the active cooling device of this embodiment for different corrugation heights of the evaporative cooling pad 2, under different ambient relative humidity and different fan 4 operating speeds, comparing the cooling amplitude with the airflow volume: See Figure 6 As shown, when the corrugation height of the evaporative cooling pad 2 is 3.5mm, the cooling effect decreases with increasing rotation speed at relative humidity levels of 28% and 18%. The fan 4 achieves the best cooling effect at 400 rpm, reducing the temperature by 10.44℃ at 18% relative humidity and by 9.35℃ at 28% relative humidity.

[0088] See Figure 7As shown, when the corrugation height of evaporative cooling pad 2 is 5mm, the cooling effect decreases with increasing rotational speed at relative humidity levels of 28% and 18%. Specifically, the cooling effect is best when the fan 4 rotates at 400 rpm, achieving a temperature reduction of 10.81℃ at 18% relative humidity and 6.25℃ at 28% relative humidity. From the cooling effect of evaporative cooling pad 2 with different corrugation heights, the evaporative cooling pad 2 with a corrugation height of 3.5mm has a better cooling effect at low rotational speeds, while the evaporative cooling pad 2 with a corrugation height of 5mm has a better cooling effect at high rotational speeds.

[0089] See Figure 8 As shown in the test results, the air volume of the wet curtain 2 with a corrugation height of 5mm is higher than that of the wet curtain 2 with a corrugation height of 3.5mm at the same fan speed.

[0090] Example 2 See Figures 1-9 As shown, this embodiment discloses a control method for an active cooling device. The method is applied to the active cooling device of Embodiment 1 and includes the following steps S10-S50.

[0091] S10: Receives cooling command and obtains the temperature set by the user.

[0092] For step S10, after the device's control unit receives the cooling start command sent by the user through the control panel, remote control or wireless terminal, it completes the system self-test, confirms that all components are in normal and operable condition, and then synchronously reads the target set temperature input by the user, and uses the set temperature as the target reference value for subsequent temperature adjustment.

[0093] In other feasible methods, a user habit learning model can be added to automatically generate and recommend suitable set temperatures based on the user's historical temperature setting data and usage time periods. The user can then complete the setting after confirmation.

[0094] S20: Obtain the outlet air temperature and indoor ambient temperature of the active cooling device.

[0095] In step S20, in practical applications, the control unit can send acquisition commands to the outlet air temperature sensor and the indoor temperature sensor. The two sensors respectively acquire real-time outlet air temperature data from the vent 34 and indoor ambient temperature data, and then transmit the acquired real-time data back to the control unit. It is understood that acquiring the outlet air temperature and indoor ambient temperature ensures that subsequent parameter adjustments are consistent with the actual operating state of the device and the actual indoor temperature, avoiding adjustment deviations.

[0096] In other feasible methods, air outlet temperature and indoor ambient temperature data can be acquired periodically according to a preset acquisition frequency, and the average value of data from multiple acquisition cycles can be calculated to further improve the stability and accuracy of temperature data.

[0097] S30: Calculate the difference between the air outlet temperature and the indoor ambient temperature and record it as the first difference; calculate the difference between the indoor ambient temperature and the temperature set by the user and record it as the second difference.

[0098] For step S30, the absolute value of the difference between the outlet air temperature and the indoor ambient temperature is taken as the first difference, which represents the actual cooling effect of the device. Simultaneously, the absolute value of the difference between the indoor ambient temperature and the user-set temperature is taken as the second difference, which represents the degree of deviation between the current indoor temperature and the user's target temperature. By calculating these two differences, the deviation between the device's actual cooling effect and the indoor temperature is quantified, providing a clear quantitative basis for subsequent operating condition judgment and parameter adjustment.

[0099] S40: When the first difference is detected to be as high as a preset first threshold, it is determined that the active cooling device is in a high temperature environment, and the water inlet volume is increased and the fan speed is increased.

[0100] In step S40, the control unit compares the calculated first difference with a pre-stored first threshold. When the first difference is greater than or equal to the first threshold, it is determined that the current indoor ambient temperature is high, and the device needs to enter the rapid cooling mode. At this time, the control unit sends an adjustment command to the water pump to increase the operating voltage of the water pump and increase the water inlet 31 to ensure that the wet curtain 2 is fully wetted. At the same time, it sends an adjustment command to the fan 4 to increase the operating speed of the fan 4, increase the air volume, and accelerate the evaporation of moisture on the surface of the wet curtain 2 and the circulation of cooling airflow. Therefore, this step realizes the automatic triggering and parameter adjustment of the device's rapid cooling mode in high-temperature environments. By simultaneously increasing the water inlet and the fan 4 speed, the cooling efficiency of the device is maximized, enabling the indoor ambient temperature to drop rapidly to the target temperature range set by the user, thus meeting the user's rapid cooling needs.

[0101] Understandably, the preset first threshold reflects a large difference between the outlet air temperature and the indoor ambient temperature. It can be set by the user or preset by the program based on application experiments.

[0102] S50: Detect the first difference at a preset time interval. When the first difference decreases to a preset second threshold and the second difference reaches a preset third threshold, simultaneously reduce the water inflow and the fan speed.

[0103] In step S50, the control unit periodically re-collects temperature data and calculates the first and second differences according to a preset sampling period, continuously tracking the cooling effect of the device and changes in indoor temperature. When the first difference is detected to drop to less than or equal to a preset second threshold, it indicates that the cooling operation has achieved a good cooling effect. Simultaneously, when the second difference drops to less than or equal to a preset third threshold, it is determined that the indoor temperature is close to the user-set temperature, and the device does not need to continue operating at high power. At this time, the control unit simultaneously sends adjustment commands to the water pump and fan 4, reducing the operating voltage of the water pump to reduce the water intake, and simultaneously reducing the operating speed of the fan 4, so that the device enters the constant temperature energy-saving mode. Therefore, this step realizes the automatic switching of the device from rapid cooling mode to constant temperature energy-saving mode. After the indoor temperature reaches the user's required range, the water intake and fan 4 speed are reduced simultaneously, maintaining a stable indoor temperature while significantly reducing the device's operating energy consumption, and avoiding the problem of excessive indoor humidity caused by excessive water intake, thus improving the energy efficiency and user comfort of the device.

[0104] Understandably, the preset second threshold reflects a small difference between the outlet air temperature and the indoor ambient temperature, which can be set by the user or preset by the program based on application experiments; the preset third threshold reflects a temperature close to the indoor ambient temperature set by the user, which can be set by the user or preset by the program based on application experiments.

[0105] The above examples are merely illustrative of the technical content of the present invention to facilitate easier understanding by the reader, but do not imply that the implementation of the present invention is limited to these examples. Any technical extensions or re-creations made based on the present invention are protected by the present invention. The scope of protection of the present invention is defined by the claims.

Claims

1. An active cooling device, characterized in that, include: The chassis is provided with a receiving groove; A wet curtain, the lower end of which is connected to the receiving groove; A water distributor is connected to the upper end of the wet curtain. The water distributor has a water inlet and a guide channel communicating with the water inlet. The guide channel gradually slopes downward from one end near the water inlet to the other end, and the bottom wall of the guide channel has a drain hole. Water flowing from the water inlet into the guide channel flows through the drain hole to the wet curtain. The water distributor also has a ventilation opening. A fan is located inside the wet curtain and is used to drive outside air to flow through the wet curtain and then be discharged from the vent.

2. The active cooling device according to claim 1, characterized in that, The number of drainage holes is at least two, and all drainage holes are arranged along the extension direction of the guide groove.

3. The active cooling device according to claim 1, characterized in that, The inclination angle of the guide groove is 4° to 6°.

4. The active cooling device according to claim 1, characterized in that, The water distributor is also equipped with a buckle assembly, and the wet curtain is snapped into the buckle assembly.

5. The active cooling device according to claim 1, characterized in that, An overflow outlet is provided at one end of the guide channel away from the water inlet. The overflow outlet is used to overflow water to the chassis when the water level in the guide channel reaches a preset value.

6. The active cooling device according to claim 1, characterized in that, The chassis is also provided with a water outlet, which is used to discharge water outside the chassis.

7. The active cooling device according to claim 1, characterized in that, Also includes: At least two side panels; the lower end of the side panels is fixedly connected to the chassis, and the water distributor is fixedly connected to the upper end of the side panels; there is a gap between adjacent side panels, and the water distributor, all the side panels and the chassis form an accommodating space, and the wet curtain is disposed in the accommodating space.

8. The active cooling device according to claim 1, characterized in that, Also includes: An air outlet temperature sensor and an indoor temperature sensor are provided; the air outlet temperature sensor is located outside the vent and is used to detect the air outlet temperature; the indoor temperature sensor is located inside the room and is used to detect the indoor ambient temperature.

9. The active cooling device according to claim 1, characterized in that, Also includes: Air volume sensor; the air volume sensor is located outside the vent and is used to detect the air volume.

10. A control method for an active cooling device, applied to the active cooling device as described in any one of claims 1-9, characterized in that, Includes the following steps: Receive cooling commands and obtain the user-set temperature; The outlet air temperature and indoor ambient temperature of the active cooling device are obtained; Calculate the difference between the outlet air temperature and the indoor ambient temperature and record it as the first difference; calculate the difference between the indoor ambient temperature and the temperature set by the user and record it as the second difference. When the first difference is detected to be as high as a preset first threshold, it is determined that the active cooling device is in a high-temperature environment, and the water inlet flow rate is increased and the fan speed is increased. The first difference is detected at a preset time interval. When the first difference decreases to a preset second threshold and the second difference reaches a preset third threshold, the water inflow and the fan speed are reduced simultaneously.

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