A multi-head cooling unit

Abstract

The present invention discloses a multi-head cooling unit, including a cooling system, wherein the cooling system is composed of a cooling water tank, a cooling tower and a refrigerating device, wherein the cooling water tank includes a freezing box and a box to be frozen; the box to be frozen and the cooling tower are connected in sequence to form a first cooling subsystem, the box to be frozen, the refrigerating device and the freezing box are connected in sequence to form a second cooling subsystem, and the box to be frozen, the cooling tower, the refrigerating device and the freezing box are connected in sequence to form a third cooling subsystem; the refrigerating device is a freezer with at least two heads or at least two or more freezers are provided. The cooling unit can automatically adjust the operating state of the freezer according to the real-time heat dissipation performance of the cooling tower and the ambient temperature through the switching of the first, second and third cooling subsystems, thereby ensuring that the cooling water temperature is stable within an ideal range and avoiding energy waste.

Description

Technical Field

[0001] The invention belongs to equipment used in an aluminum foil corrosion process, and in particular relates to a multi-head cooling unit. Background Art

[0002] In the aluminum foil corrosion process, the refrigerator and its cooling system play a role in controlling heat and temperature during the corrosion process; aluminum foil corrosion is a chemical reaction process, and the heat generated during the reaction process will undoubtedly lead to an increase in the reaction temperature, which makes it difficult to control the corrosion rate, and has a great impact on maintaining the stability of the aluminum foil corrosion process and product quality. In the corrosion process of all metal materials, increasing the corrosion environment temperature and extending the corrosion time will increase metal corrosion. Therefore, the use of a refrigerator or cooling system can help maintain the temperature of the corrosion liquid within an ideal range, thereby controlling the corrosion rate, avoiding excessive corrosion of the aluminum foil, and ensuring the uniformity and repeatability of the corrosion process.

[0003] For example, the utility model patent with application number CN201320206772.1 discloses a water circulation cooling system for an electrode foil production line, in which the bottom of the hot water collection tank in the cooling system is connected to a high-level cooling tower via a water pump, and the bottom of the high-level cooling tower is connected to a cold water collection tank via a pipeline, and the bottom of the cold water collection tank is connected to the cooling water inlet of the heat exchanger via a water pump. The system realizes the recycling of cooling water, which can save nearly 90% of water, and the more production lines connected to the system, the greater the water saving, and the benefits are considerable.

[0004] The cooling system relies solely on high-level cooling towers to cool the water. In high-load or hot summer environments, the heat dissipation capacity will drop significantly, causing the cooling water temperature to rise, and it cannot meet the cooling efficiency requirements of the production line. To solve this problem, many manufacturers choose to integrate a refrigerator in the cooling system. This measure does significantly enhance the performance of the cooling system, but it also brings a problem: the heat dissipation effect of the high-level cooling tower is greatly affected by environmental factors, especially in the hot summer, and a high-power refrigerator is needed to compensate for the problem of reduced heat dissipation capacity of the high-level cooling tower to ensure the efficient operation of the entire system. However, as the seasons change to winter, although the high-power refrigerator can still effectively control the cooling water temperature and maintain it within the ideal range, the starting current and drive current consumed during its operation are extremely large. If the same high-power refrigerator is still used in winter as in summer, there will be excessive consumption of electricity resources, resulting in waste.

[0005] In addition, the currently widely used high-level cooling towers mainly achieve the purpose of cooling by spraying water evenly on the filler, and then using the convection of natural air in the gaps between the fillers. However, the filler may wear and fall off during long-term use. In order to avoid affecting the heat dissipation capacity of the high-level cooling tower, it is necessary to regularly clean the filler inside the cooling tower and quickly clean up the fallen filler fragments to prevent them from blocking the water flow path or affecting air circulation. However, the cleaning work of existing cooling towers is almost entirely dependent on manual operation, which is not only time-consuming but also inefficient. During the cleaning operation, in order to ensure safety and thorough cleaning, it is usually necessary to temporarily stop the cooling tower from running. This means that during the cleaning period, the cooling tower cannot continue to perform its heat dissipation function, which may have an adverse effect on the continuity and overall efficiency of the production line. Summary of the invention

[0006] In view of this, an object of the present invention is to provide a multi-head cooling unit to solve the problems existing in the above-mentioned background technology.

[0007] In order to solve the above technical problems, the technical solution of the present invention is a multi-head cooling unit, including a cooling system, wherein the cooling system is composed of a cooling water tank, a cooling tower and a refrigeration equipment, the cooling water tank includes a freezer and a box to be frozen; the box to be frozen and the cooling tower are connected in sequence to form a first cooling subsystem, the box to be frozen, the refrigeration equipment and the freezer are connected in sequence to form a second cooling subsystem, and the box to be frozen, the cooling tower, the refrigeration equipment and the freezer are connected in sequence to form a third cooling subsystem; the refrigeration equipment is a freezer with at least two heads or at least two or more freezers are set; in the third cooling subsystem, the refrigeration equipment controls the number of open heads or the number of open freezers according to changes in the heat dissipation performance of the cooling tower.

[0008] Preferably, in the first cooling subsystem, the water outlet of the cooling tower and the water inlet of the box to be refrigerated are connected by a gravity return pipe.

[0009] Preferably, a partition is provided inside the cooling water tank, thereby dividing the interior of the cooling water tank into the freezing box and the box to be frozen; the box to be frozen is used to store water to be cooled after use, and the freezing box is used to store water cooled by the refrigeration equipment.

[0010] Preferably, a temperature sensor is provided at the water outlet of the cooling tower, and the heat dissipation performance of the cooling tower is deduced from the temperature fed back by the temperature sensor; thereby determining the start and stop of the first cooling subsystem, the second cooling subsystem and the third cooling subsystem, and controlling the number of opened heads or the number of opened refrigerators in the third cooling subsystem.

[0011] Preferably, the cooling tower includes a tower body, a filler located in the tower body, a spray mechanism arranged above the filler and a water collecting tank located below the filler, and the cooling tower also includes a spray mechanism arranged on the side of the filler; a reversing valve is arranged at the connection between the spray mechanism, the spray mechanism and the water inlet of the cooling tower; the spray mechanism includes a swing frame for arranging the filler and a spray pipe for cleaning the filler; the swing frame is composed of clamps arranged on the left and right sides of the filler, and the clamps are provided with connecting rods, and the distance between the clamps is controlled by the connecting rods; under the swinging action of the swing frame, the debris in the filler falls off; under the impact of the water flow in the spray pipe, the falling of the debris in the filler can be accelerated, and the surface of the filler can also be cleaned at the same time.

[0012] Furthermore, the cooling tower also includes a residue filtering mechanism disposed on the water collecting tank; the residue filtering mechanism includes a filter screen, the filter screen is located above the water collecting tank, and the filter screen is used to separate the fallen debris and water.

[0013] Furthermore, the spray pipe and the reversing valve are connected by a hose; both ends of the spray pipe are provided with a limit member and a driving member perpendicular to the spray pipe; the limit member and the spray pipe are slidably connected, and the driving member and the spray pipe are threadedly connected, and the driving member is rotated to allow the spray to move in the length direction of the driving member and the driving member; a driving motor and a transmission wheel are respectively arranged at both ends of the driving member, and a transmission rod is arranged between the transmission wheel and the swing frame; the driving member drives the transmission wheel to rotate, thereby driving the transmission rod to drive the swing frame to swing.

[0014] Furthermore, one end of the transmission rod is rotatably set on the swing frame, and the other end of the transmission rod is rotatably set at the eccentric position of the transmission wheel; when the transmission wheel rotates, the transmission rod set at its eccentric position will have a pulling effect on the other end of the transmission rod, thereby causing the swing frame to swing.

[0015] Furthermore, the end face of the transmission wheel is an inclined surface; one end of the transmission rod is rotatably arranged on the swing frame, the middle part of the transmission rod is rotatably connected to the tower body, and the other end of the transmission rod is in contact with the inclined surface; when the transmission wheel rotates, the transmission rod will pry the swing frame to swing due to the height change brought about by the rotation of the inclined surface.

[0016] Furthermore, a mounting groove is provided on the periphery of the notch of the water collecting trough, and the mounting groove is used to install the filter screen. The filter screen is inclined in the width direction thereof, and a telescopic joint composed of a spring is provided on the filter screen.

[0017] The technical effects of the present invention are mainly reflected in the following aspects: the cooling unit can automatically adjust the operating state of the refrigerator according to the real-time heat dissipation performance and ambient temperature of the cooling tower through the switching of the first, second and third cooling subsystems, ensure that the cooling water temperature is stable within the ideal range, and avoid energy waste. The spray washing mechanism combines the swing of the swing frame, through the dual effects of high-pressure water flow impact and mechanical vibration, effectively cleans the surface of the filler and accelerates the shedding of debris; it not only improves the heat dissipation efficiency of the filler, but also extends the service life of the filler and reduces the maintenance cost. In actual operation, the drive motor is started, and the drive part rotates accordingly, driving the spray washing pipe to move along its axial direction through the screw connection. At the same time, the rotation of the transmission wheel acts on the swing frame through the transmission rod, causing it to swing regularly. The movement of the spray washing pipe is combined with the vibration of the swing frame, so that the high-pressure water flow is accurately sprayed on the filler, which not only accelerates the shedding of debris, but also achieves deep cleaning of the filler surface, greatly improving the cleaning efficiency and maintenance effect of the cooling tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the present invention;

[0019] Figure 2 for Figure 1 A schematic diagram of the first cooling subsystem;

[0020] Figure 3 for Figure 1 A schematic diagram of the second cooling subsystem;

[0021] Figure 4 for Figure 1 A schematic diagram of the third cooling subsystem;

[0022] Figure 5 for Figure 1 Schematic diagram of the traditional structure of a cooling tower;

[0023] Figure 6 for Figure 1 Schematic diagram of the improved structure of the cooling tower;

[0024] Figure 7 for Figure 6 Structural diagram of the middle spray washing mechanism;

[0025] Figure 8 for Figure 6 Structural diagram of the middle filter residue mechanism;

[0026] In the figure: 1. cooling water tank, 11. freezing box, 12. box to be frozen, 13. partition; 2. cooling tower, 210. tower body, 211. spray mechanism, 212. water collecting tank; 22. spray washing mechanism, 221. swing frame, 222. spray washing pipe, 223. clamping plate, 224. connecting rod, 225. limit member, 226. driving member, 227. transmission wheel, 228. transmission rod; 23. filter residue mechanism, 231. filter screen, 232. mounting groove, 233. telescopic joint, 234. spring; 3. refrigeration equipment. DETAILED DESCRIPTION

[0027] The specific implementation modes of the present invention are further described below in conjunction with the accompanying drawings to make the technical solutions of the present invention easier to understand and grasp.

[0028] In this embodiment, it should be understood that the terms "middle", "upper", "lower", "top", "right", "left end", "above", "back", "middle", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0029] In addition, in this specific embodiment, if the connection or fixing method between components is not specifically described, the connection or fixing method can be through bolt fixing or pin fixing, or pin shaft connection and the like commonly used in the prior art, and therefore, it will not be described in detail in this embodiment.

[0030] Embodiment 1

[0031] See also Figure 1 A multi-head cooling unit includes a cooling system, wherein the cooling system is composed of a cooling water tank 1, a cooling tower 2 and a refrigeration device 3. The cooling water tank 1 includes a freezing box 11 and a box to be frozen 12. The refrigeration device 3 is a freezer with at least two heads or at least two or more freezers.

[0032] See also Figure 2 , connecting the freezer box 12 and the cooling tower 2 in sequence to form a first cooling subsystem, cooling is performed only through the cooling tower 2, which is suitable for situations where the ambient temperature is low or the production load is not high. At this time, there is no need to activate the refrigeration equipment 3 to meet the cooling demand, thereby achieving energy saving.

[0033] See also Figure 3, the box to be refrigerated 12, the freezing equipment 3 and the freezing box 11 are connected in sequence to form a second cooling subsystem. When the heat dissipation capacity of the cooling tower 2 is insufficient, the system will automatically switch to the second cooling subsystem, that is, the cooling water directly enters the freezing equipment 3 from the box to be refrigerated 12 for deep cooling, and then is stored in the freezing box 11 for use in the production line. This mode is particularly effective under high load or hot seasons.

[0034] See also Figure 4 , the freezer 12, the cooling tower 2, the freezing equipment 3 and the freezer 11 are connected in sequence to form a third cooling subsystem; the functions of the cooling tower 2 and the freezing equipment 3 are integrated, the cooling tower 2 is used for preliminary cooling, and then the freezing equipment 3 is used for further cooling, so as to ensure the stability of the cooling water temperature and maintain the stable operation of the production line even under extreme conditions; the advantages of the freezing equipment 3 over the variable frequency freezer are: multiple heads or freezers mean that if one unit fails, other units can continue to work, ensuring the continuous operation of the system; even during repair or maintenance, the system can still maintain part of the refrigeration capacity. When the maximum refrigeration capacity is not required, energy can be saved by running only part of the heads. Moreover, the core of the variable frequency technology is to provide more precise temperature control, but in the aluminum foil corrosion process, only the water temperature needs to be lowered, and no precise temperature control is required. For this reason, the variable frequency technology is not used in the cooling unit; furthermore, the application of the variable frequency technology enables the compressor to adjust the speed according to the actual refrigeration demand, thereby avoiding unnecessary energy consumption; even under very low loads, because the efficiency of the inverter will decrease at low speed, the variable frequency freezer may not be as efficient as expected. Finally, variable frequency chiller systems typically include more sensors and feedback mechanisms to achieve precise temperature control, which increases system complexity and can lead to more failure points.

[0035] See also Figure 1-4In the first cooling subsystem, the water outlet of the cooling tower 2 and the water inlet of the box to be frozen 12 are connected by a gravity return pipe; in the first cooling subsystem, the gravity return pipe connects the water outlet of the cooling tower 2 and the water inlet of the box to be frozen 12. This design makes full use of the principle of gravity, so that the cooling water can naturally flow back to the box to be frozen 12 without the need for additional power, waiting for the next cooling process; it not only simplifies the system structure, but also reduces energy consumption. The interior of the cooling water tank 1 is provided with a partition 13, thereby dividing the interior of the cooling water tank 1 into the freezing box 11 and the box to be frozen 12; the box to be frozen 12 is used to store water to be cooled after use, and the freezing box 11 is used to store water cooled by the freezing equipment 3. In the third cooling subsystem, the freezing equipment 3 controls the number of heads or the number of freezers opened according to the change of the heat dissipation performance of the cooling tower 2. A temperature sensor is provided at the outlet of the cooling tower 2. The temperature feedback from the temperature sensor is used to deduce the heat dissipation performance of the cooling tower 2, thereby determining the start and stop of the first cooling subsystem, the second cooling subsystem and the third cooling subsystem, and controlling the number of heads or refrigerators opened in the third cooling subsystem. The temperature sensor monitors the heat dissipation performance of the cooling tower 2 and automatically adjusts the start and stop of the cooling subsystem and the operation mode of the refrigerator. Based on the feedback from the temperature sensor, the system intelligently decides whether to activate the first cooling subsystem (using only the cooling tower 2), the second cooling subsystem (cooling water directly passes through the freezing equipment 3), or the third cooling subsystem (cooling tower 2 and freezing equipment 3 work together). In the third cooling subsystem, the system can also dynamically adjust the number of heads opened or the number of refrigerators in the freezing equipment 3 according to the actual heat dissipation capacity of the cooling tower 2, ensuring the stability of the cooling water temperature and minimizing energy consumption. Especially in seasons with low ambient temperatures such as winter, the system can automatically reduce or even completely shut down the operation of the freezing equipment 3, and rely on the cooling tower 2 for cooling, which greatly reduces energy consumption and reflects the intelligence and energy-saving characteristics of the system.

[0036] Embodiment 2

[0037] The filler inside the cooling system is a key component of the cooling system in a multi-head cooling unit in the first embodiment, and is crucial for promoting water-gas exchange and improving cooling efficiency. However, the filler is prone to accumulate impurities after long-term operation, affecting the cooling effect. To this end, the cooling tower 2 in this embodiment is specially designed with a spraying mechanism 22 and a residue filtering mechanism 23 to achieve effective cleaning of the filler and effective separation of the debris falling with the water flow, ensuring the purity of the cooling water, thereby improving the efficiency and stability of the entire cooling system.

[0038] See also Figure 5The cooling tower 2 includes a tower body 210, a filler located in the tower body 210, a spray mechanism 211 arranged above the filler, and a water collecting tank 212 located below the filler; the above is the existing structural composition of the traditional cooling tower 2, and no further description is given here.

[0039] Lieutenant General Figure 6 , the cooling tower 2 also includes a spray mechanism 22 arranged on the side of the packing; a reversing valve is arranged at the connection between the spray mechanism 22, the spray mechanism 211 and the water inlet of the cooling tower 2; the water inlet is switched by the reversing valve to connect the spray mechanism 22 or the spray mechanism 211 to ensure that the water pressure of the spray mechanism 22 is sufficient when working; at the same time, the packing is cleaned with the water to be cooled, and the water can be cooled to a certain extent while playing a cleaning role. The spray mechanism 22 includes a swing frame 221 for placing the packing and a spray pipe 222 for cleaning the packing; the spray pipe 222 impacts the packing with high-pressure water flow, which not only accelerates the shedding of debris, but also can directly clean the surface of the packing to ensure the cleanliness and heat dissipation efficiency of the packing. The swing frame 221 is composed of clamping plates 223 arranged on the left and right sides of the filler, and the clamping plates 223 are provided with connecting rods 224, and the distance between the clamping plates 223 is controlled by the connecting rods 224; the swing frame 221 is composed of clamping plates 223 located on both sides of the filler, and the distance between the clamping plates 223 is controlled by the connecting rods 224. When the swing frame 221 swings, the filler also swings, causing the debris attached to it to fall off. The swing frame 221 is movably installed in the tower body, and can be connected by means of movable connecting rod hoisting and spring support. Since there are many ways to movably install the bracket indoors, no further description is given.

[0040] Under the swinging action of the swing frame 221, the debris in the filler falls off; under the impact of the water flow of the spray pipe 222, the debris in the filler can be accelerated to fall off, and the surface of the filler can also be cleaned. By cleaning the filler regularly, the influence of fouling on the cooling effect is avoided, ensuring that the cooling tower 2 always maintains efficient operation. The impurities on the filler are removed in time, which reduces the burden on the filler, extends its service life, and reduces the replacement cost. The automated cleaning mechanism reduces the frequency and complexity of manual maintenance, reduces maintenance time and cost, and improves the overall efficiency of the production line.

[0041] See also Figure 6 The cooling tower 2 also includes a residue filter mechanism 23 arranged on the water collecting tank 212; the residue filter mechanism 23 includes a filter screen 231, and the filter screen 231 is located above the water collecting tank 212, and the filter screen 231 is used to separate the fallen debris and water; through the filtering of the residue filter mechanism 23, the impurities in the cooling water are effectively removed, ensuring the normal operation of the cooling system and avoiding equipment failures caused by water quality problems.

[0042] See also Figure 7 The spray pipe 222 and the reversing valve are connected by a hose; the spray pipe 222 and the reversing valve are connected by a hose, which provides the necessary flexibility, ensures that the spray pipe 222 will not be mechanically restricted during operation, and maintains smooth transmission of water flow. The two ends of the spray pipe 222 are provided with a limiter 225 and a drive member 226 perpendicular to it; the limiter 225 and the spray pipe 222 are connected in a sliding manner, and the drive member 226 and the spray pipe 222 are connected in a screw connection. The drive member 226 rotates to allow the spray to move in the length direction of the drive member 226 and the drive member 226.

[0043] The function of the limiter 225 is to allow the spray pipe 222 to move along the length direction of the limiter 225, and it can be a slide rod, a slide rail, etc. The driving member 226 can be a threaded rod or a reciprocating screw. A driving motor and a transmission wheel 227 are respectively arranged at both ends of the driving member 226, and a transmission rod 228 is arranged between the transmission wheel 227 and the swing frame 221; the driving member 226 drives the transmission wheel 227 to rotate, thereby driving the transmission rod 228 to drive the swing frame 221 to swing. One end of the transmission rod 228 is rotatably arranged on the swing frame 221, and the other end of the transmission rod 228 is rotatably arranged at the eccentric position of the transmission wheel 227; when the transmission wheel 227 rotates, the transmission rod 228 arranged at its eccentric position will have a pulling effect on the other end of the transmission rod 228, thereby causing the swing frame 221 to swing. The other end of the transmission wheel 227 is connected to the swing frame 221, forming a mechanical linkage through the transmission rod 228; the transmission wheel 227 is designed as an eccentric structure. When it rotates, the transmission rod 228 located in the eccentric position will generate a periodic pulling force due to the circular motion, causing the swing frame 221 to swing, thereby driving the filler to vibrate and accelerating the shedding of the debris.

[0044] Specifically, in actual operation, the driving motor is started, and the driving member 226 rotates accordingly, driving the spray pipe 222 to move along its axial direction through the screw connection. At the same time, the rotation of the transmission wheel 227 acts on the swing frame 221 through the transmission rod 228, causing it to swing regularly. The movement of the spray pipe 222 is combined with the vibration of the swing frame 221, so that the high-pressure water flow is accurately sprayed on the filler, which not only accelerates the shedding of the debris, but also achieves deep cleaning of the filler surface, greatly improving the cleaning efficiency and maintenance effect of the cooling tower 2.

[0045] See also Figure 8The outer periphery of the notch of the water collecting tank 212 is provided with an installation groove 232, and the installation groove 232 is used to install the filter 231. The filter 231 is inclined in the width direction thereof, and a vertical pole is provided at the end of the filter 231 that contacts the tower body 210. The vertical pole is a retractable structure, and the inclination angle of the filter 231 is adjusted by the vertical pole. The inclination angle helps solid particles to slide down under the action of gravity, reducing the possibility of clogging of the filter 231, and also facilitates maintenance personnel to perform cleaning operations, and the accumulated impurities can be removed without frequent disassembly of the filter 231. The filter 231 is provided with an expansion joint 233 composed of a spring 234; the design of the expansion joint 233 makes the installation and disassembly of the filter 231 more convenient, simplifies the cleaning and replacement process of the filter 231, reduces the workload of maintenance personnel, and indirectly reduces the maintenance cost of the cooling system.

[0046] Embodiment 3

[0047] In this embodiment, the relationship between the transmission wheel 227, the transmission rod 228 and the swing frame 221 in the second embodiment is newly improved, and the specific situation is as follows:

[0048] The end face of the transmission wheel 227 is an inclined surface; one end of the transmission rod 228 is rotatably set on the swing frame 221, the middle part of the transmission rod 228 is rotatably connected to the tower body 210, and the other end of the transmission rod 228 is in contact with the inclined surface; when the transmission wheel 227 rotates, the transmission rod 228 will pry the swing frame 221 to swing due to the height change brought about by the rotation of the inclined surface.

[0049] The technical effects of the present invention are mainly reflected in the following aspects: the cooling unit can automatically adjust the operating state of the refrigerator according to the real-time heat dissipation performance and ambient temperature of the cooling tower 2 by switching the first, second and third cooling subsystems, ensuring that the cooling water temperature is stable within the ideal range, while avoiding energy waste. The spray mechanism 22 is combined with the swing of the swing frame 221, and through the dual effects of high-pressure water flow impact and mechanical vibration, it effectively cleans the surface of the filler and accelerates the shedding of debris; it not only improves the heat dissipation efficiency of the filler, but also extends the service life of the filler and reduces the maintenance cost. In actual operation, the drive motor is started, and the drive member 226 rotates accordingly, driving the spray pipe 222 to move along its axial direction through the screw connection. At the same time, the rotation of the transmission wheel 227 acts on the swing frame 221 through the transmission rod 228, causing it to swing regularly. The movement of the spray pipe 222 is combined with the vibration of the swing frame 221, so that the high-pressure water flow is accurately sprayed on the filler, which not only accelerates the shedding of debris, but also achieves deep cleaning of the filler surface, greatly improving the cleaning efficiency and maintenance effect of the cooling tower 2.

[0050] In addition, as common knowledge in the industry, the drive motor, slide rod, slide rail, threaded rod and reciprocating screw mentioned above are common knowledge, so their principles and structures will not be described in detail.

[0051] Of course, the above are only typical examples of the present invention. In addition, the present invention may also have many other specific implementations. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. A multi-head cooling unit, comprising a cooling system, the cooling system consisting of a cooling water tank, a cooling tower and a refrigeration device; the cooling tower comprises a tower body, a filler located in the tower body, a spray mechanism arranged above the filler and a water collecting tank located below the filler, characterized in that: The cooling water tank includes a freezing box and a box to be frozen; the box to be frozen and the cooling tower are connected in sequence to form a first cooling subsystem, the box to be frozen, the freezing equipment and the freezing box are connected in sequence to form a second cooling subsystem, and the box to be frozen, the cooling tower, the freezing equipment and the freezing box are connected in sequence to form a third cooling subsystem; the freezing equipment is a freezer with at least two heads; in the third cooling subsystem, the freezing equipment controls the number of heads to be opened according to the change in the heat dissipation performance of the cooling tower; The cooling tower also includes a spray mechanism arranged on the side of the filler; a reversing valve is arranged at the connection between the spray mechanism, the spray mechanism and the water inlet of the cooling tower; the spray mechanism includes a swing frame for arranging the filler and a spray pipe for cleaning the filler; the swing frame is composed of clamping plates arranged on the left and right sides of the filler, and the clamping plates are provided with connecting rods, and the distance between the clamping plates is controlled by the connecting rods; under the swinging action of the swing frame, the debris in the filler falls off; under the impact of the water flow in the spray pipe, the falling of the debris in the filler can be accelerated, and the surface of the filler can also be cleaned.

2. The multi-head cooling unit according to claim 1, characterized in that: In the first cooling subsystem, the water outlet of the cooling tower and the water inlet of the box to be refrigerated are connected by a gravity return pipe.

3. The multi-head cooling unit according to claim 1, characterized in that: The interior of the cooling water tank is provided with a partition, thereby dividing the interior of the cooling water tank into the freezing tank and the to-be-frozen tank; the to-be-frozen tank is used to store water to be cooled after use, and the freezing tank is used to store water cooled by the refrigeration equipment.

4. The multi-head cooling unit according to claim 1, characterized in that: A temperature sensor is provided at the water outlet of the cooling tower, and the heat dissipation performance of the cooling tower is deduced from the temperature fed back by the temperature sensor; thereby determining the start and stop of the first cooling subsystem, the second cooling subsystem and the third cooling subsystem, and controlling the number of heads opened in the third cooling subsystem.

5. The multi-head cooling unit according to claim 1, characterized in that: The cooling tower also includes a residue filtering mechanism disposed on the water collecting tank; The residue filtering mechanism comprises a filter screen, which is located above the water collecting tank and is used to separate the fallen debris and water.

6. The multi-head cooling unit according to claim 1, characterized in that: The spray pipe and the reversing valve are connected by a hose; both ends of the spray pipe are provided with a limiter and a driving member perpendicular to the spray pipe; the limiter and the spray pipe are slidably connected, and the driving member and the spray pipe are screwed together, and the driving member rotates to allow the spray to move in the length direction of the driving member and the driving member; A driving motor and a transmission wheel are respectively arranged at both ends of the driving member, and a transmission rod is arranged between the transmission wheel and the swing frame; the driving member drives the transmission wheel to rotate, thereby driving the transmission rod to drive the swing frame to swing.

7. The multi-head cooling unit according to claim 6, characterized in that: One end of the transmission rod is rotatably arranged on the swing frame, and the other end of the transmission rod is rotatably arranged at the eccentric position of the transmission wheel; When the transmission wheel rotates, the transmission rod arranged at the eccentric position thereof will have a pulling effect on the other end of the transmission rod, thereby causing the swing frame to swing.

8. The multi-head cooling unit according to claim 6, characterized in that: The end surface of the transmission wheel is an inclined surface; one end of the transmission rod is rotatably arranged on the swing frame, the middle part of the transmission rod is rotatably connected to the tower body, and the other end of the transmission rod is in contact with the inclined surface; When the transmission wheel rotates, the transmission rod will pry the swing frame to swing due to the height change caused by the rotation of the inclined surface.

9. The multi-head cooling unit according to claim 5, characterized in that: An installation groove is provided at the periphery of the notch of the water collecting trough, and the installation groove is used to install the filter screen. The filter screen is inclined in the width direction thereof, and an expansion joint composed of a spring is provided on the filter screen.

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