Closed cooling tower

Abstract

The invention relates to the technical field of industrial cooling equipment, in particular to a closed cooling tower. The closed cooling tower comprises a circulating cooling assembly and a refrigerant circulating assembly. The spraying unit is used for spraying cooling water towards the soft water heat exchange coil pipe, and the soft water heat exchange coil pipe communicates with an external soft water pipeline; the evaporator is arranged in the cooling water circulating tank and is used for receiving the cooling water flowing through the soft water heat exchange coil pipe; the cooling water circulating pump is communicated with the cooling water circulating tank and the spraying unit so as to pump the cooling water in the cooling water circulating tank to the spraying unit; the refrigerant circulation assembly is connected to the top of the soft water circulation box or the bottom of the cooling water circulation box and communicates with the evaporator. Wherein the cooling water is demineralized water. The closed cooling tower adopts a closed structural design, the external environment is isolated, and the maintenance cost can be reduced; and moreover, the temperature of the circulating cooling water can be controlled, the temperature fluctuation is reduced, the energy consumption is reduced, and efficient, energy-saving and effective cooling can be carried out in all seasons.

Description

Technical Field

[0001] The invention relates to the technical field of industrial cooling equipment, in particular to a closed cooling tower. Background Art

[0002] Due to its structural characteristics, traditional closed cooling towers are greatly affected by the environment. Spray water overflows and splashes occur from time to time. After long-term use, the spray water quality will inevitably deteriorate, causing scaling of coils and corrugated plates, and reducing heat exchange efficiency. Replacing tower fillers and cleaning coils are complicated, time-consuming and labor-intensive, and also affect system operation.

[0003] In addition, since the spray water uses air cooling, it is greatly affected by the air temperature. In the hot summer, the temperature is often too high, resulting in the closed circulating water being unable to cool down effectively. If the incoming water temperature rises and the cooling range is limited, the return water temperature cannot be achieved. Therefore, a traditional closed cooling tower cannot ensure that the water temperature fluctuates within a reasonable range. The temperature control effect can only be achieved by stopping or opening and closing the tower, which increases labor costs and is also uncertain. Frequent start and stop operations can easily increase energy consumption. Summary of the invention

[0004] The purpose of the present invention includes providing a closed cooling tower, which adopts a closed structural design, isolates the external environment, and uses desalted water as circulating cooling water, effectively eliminating the problems of large evaporation in traditional closed towers, scaling of coils and fillers affecting heat exchange efficiency, etc., thereby reducing maintenance costs; moreover, through refrigeration and heat dissipation, the circulating cooling water can be temperature controlled, and the evaporator is directly placed inside, so that while improving the cooling, the temperature loss can be reduced, the temperature fluctuation can be reduced, and the energy consumption can be reduced; thereby effectively solving the problems of insufficient cooling in traditional closed towers in summer and stopping the tower for heating in winter due to excessively cold weather, effectively solving the problem of insufficient utilization of cooling towers in all seasons, and effectively eliminating the traditional closed tower water replenishment and cooling methods in summer, so that efficient, energy-saving and effective cooling can be carried out in all seasons.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] The present invention provides a closed cooling tower, which includes a circulating cooling component and a refrigerant circulating component;

[0007] The circulating cooling components include a soft water circulation tank, a cooling water circulation tank, a spray unit, a soft water heat exchange coil, an evaporator and a cooling water circulation pump;

[0008] The spray unit and the soft water heat exchange coil are both arranged in the soft water circulation box, and the spray unit is used to spray cooling water toward the soft water heat exchange coil, and the soft water heat exchange coil is connected to the external soft water pipeline;

[0009] The evaporator is arranged in the cooling water circulation box and is used to receive the cooling water after passing through the soft water heat exchange coil; the cooling water circulation pump is connected with the cooling water circulation box and the spray unit to pump the cooling water in the cooling water circulation box to the spray unit;

[0010] The refrigerant circulation assembly is connected to the top of the soft water circulation tank or to the bottom of the cooling water circulation tank and is communicated with the evaporator;

[0011] Among them, the cooling water is desalted water.

[0012] In an optional embodiment, the refrigerant cycle assembly includes a refrigeration box, a heat dissipation fan, a compressor and a condenser;

[0013] The refrigeration box is equipped with an inner cavity and a heat dissipation duct connected to the inner cavity, and the heat dissipation fan is arranged in the heat dissipation duct; the compressor and the condenser are both arranged in the inner cavity, and the condenser is connected to the compressor;

[0014] The refrigerant inlet of the compressor is communicated with the refrigerant outlet of the evaporator, and the refrigerant outlet of the condenser is communicated with the refrigerant inlet of the evaporator.

[0015] In an optional embodiment, the spray unit is located directly above the soft water heat exchange coil;

[0016] The soft water circulation box is arranged above the cooling water circulation box, and the soft water circulation box and the cooling water circulation box are connected at the boundary so that the cooling water after flowing through the soft water heat exchange coil flows to the evaporator under the action of gravity.

[0017] In an optional embodiment, a first temperature sensor and a second temperature sensor are respectively provided at the water inlet and the water outlet of the soft water heat exchange coil;

[0018] A third temperature sensor is arranged at the water inlet or the water outlet of the cooling water circulation pump.

[0019] In an optional embodiment, a first fixed baffle, a first movable baffle and a first driving member are provided at the boundary between the soft water circulation box and the cooling water circulation box;

[0020] The first fixed partition is provided with a plurality of first water guide holes in an array, and the first water guide holes connect the soft water circulation box with the cooling water circulation box;

[0021] The first movable baffle is movably connected to the first fixed baffle, and the first driving member is connected to the first fixed baffle and is used to drive the first movable baffle to move relative to the first fixed baffle to block all the first water guide holes or at least partially open all the first water guide holes.

[0022] In an optional embodiment, a first liquid level gauge is provided in the soft water circulation box, and the first liquid level gauge is located above the first fixed partition.

[0023] In an optional embodiment, a second fixed baffle, a second movable baffle and a second driving member are provided in the cooling water circulation box;

[0024] The second fixed baffle is located below the evaporator, and the second fixed baffle is provided with a plurality of second water guide holes in an array; the second movable baffle is movably connected to the second fixed baffle, and the second driving member is connected to the second fixed baffle and is used to drive the second movable baffle to move relative to the second fixed baffle, so as to block all the second water guide holes, or at least partially open all the second water guide holes;

[0025] The connection point between the cooling water circulation pump and the cooling water circulation box is located below the second fixed partition.

[0026] In an optional embodiment, a second liquid level gauge is provided in the cooling water circulation box, and the second liquid level gauge is located above the second fixed partition.

[0027] In an optional embodiment, the closed cooling tower further includes a water supply tank, a water supply evaporator and a water supply pump;

[0028] The water-making evaporator is accommodated in the water-making tank, and the water-making evaporator is connected to the refrigerant circulation component; the water inlet end of the water-making pump is connected to the water-making tank, and the water discharge end thereof is connected to the water inlet of the cooling water circulation pump or the spray unit.

[0029] In an optional embodiment, the water replenishment tank is arranged below the cooling water circulation tank and is connected to the cooling water circulation tank through a water pipe, and an on-off valve is provided on the water pipe.

[0030] The closed cooling tower provided by the embodiment of the present invention has the following beneficial effects:

[0031] The closed cooling tower includes a circulating cooling component and a refrigerant circulating component; the circulating cooling component includes a soft water circulating box, a cooling water circulating box, a spray unit, a soft water heat exchange coil, an evaporator and a cooling water circulating pump; the spray unit and the soft water heat exchange coil are both arranged in the soft water circulating box, and the spray unit is used to spray cooling water toward the soft water heat exchange coil, and the soft water heat exchange coil is connected to an external soft water pipeline; the evaporator is arranged in the cooling water circulating box, and is used to receive cooling water after flowing through the soft water heat exchange coil; the cooling water circulating pump is connected to the cooling water circulating box and the spray unit to pump the cooling water in the cooling water circulating box to the spray unit; the refrigerant circulating component is connected to the top of the soft water circulating box or to the bottom of the cooling water circulating box, and is connected to the evaporator; wherein the cooling water is desalted water.

[0032] The closed cooling tower adopts a closed structural design to isolate the external environment and uses desalted water as the circulating cooling water, which effectively eliminates the problems of large evaporation in traditional closed towers, scaling of coils and fillers affecting heat exchange efficiency, thereby reducing maintenance costs; moreover, through refrigeration and heat dissipation, the circulating cooling water can be temperature controlled, and the evaporator is placed directly inside, which can reduce temperature loss, reduce temperature fluctuations, and reduce energy consumption while improving cooling; thereby effectively solving the problems of insufficient cooling in traditional closed towers in summer and stopping the tower for heating in winter due to excessively cold weather, effectively solving the problem of insufficient utilization of cooling towers in all seasons, and effectively eliminating traditional closed tower water replenishment and cooling in summer, so that efficient, energy-saving and effective cooling can be carried out in all seasons. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 A schematic diagram of the structure of a closed cooling tower provided in this embodiment;

[0035] Figure 2 A schematic structural diagram of the closed cooling tower provided in this embodiment is provided with a first fixed baffle, a first movable baffle and a first driving member.

[0036] Icons: 100-closed cooling tower; 110-circulating cooling component; 120-refrigerating agent circulation component; 111-soft water circulation box; 112-cooling water circulation box; 113-spray unit; 114-soft water heat exchange coil; 115-evaporator; 116-cooling water circulation pump; 121-refrigeration box; 122-cooling fan; 123-compressor; 124-condenser; 141-first fixed partition; 142-first movable partition; 143-first driving member; 144-first water guide hole; 151-second fixed partition; 152-second movable partition; 153-second driving member; 154-second water guide hole; 161-water supply tank; 162-water supply evaporator; 163-water supply pump; 164-water guide pipe; 165-on-off valve. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0040] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0041] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0042] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0043] Please refer to Figure 1 , this embodiment provides a closed cooling tower 100, the closed cooling tower 100 includes a circulating cooling component 110 and a refrigerant circulating component 120;

[0044] The circulating cooling component 110 includes a soft water circulation box 111, a cooling water circulation box 112, a spray unit 113, a soft water heat exchange coil 114, an evaporator 115 and a cooling water circulation pump 116;

[0045] The spray unit 113 and the soft water heat exchange coil 114 are both disposed in the soft water circulation box 111, and the spray unit 113 is used to spray cooling water toward the soft water heat exchange coil 114, and the soft water heat exchange coil 114 is connected to an external soft water pipeline;

[0046] The evaporator 115 is disposed in the cooling water circulation box 112 and is used to receive the cooling water after passing through the soft water heat exchange coil 114; the cooling water circulation pump 116 is connected to the cooling water circulation box 112 and the spray unit 113 to pump the cooling water in the cooling water circulation box 112 to the spray unit 113;

[0047] The refrigerant circulation assembly 120 is connected to the top of the soft water circulation box 111 or to the bottom of the cooling water circulation box 112 and is in communication with the evaporator 115;

[0048] Among them, the cooling water is desalted water.

[0049] Please refer to Figure 1 , the working principle of the closed cooling tower 100 is;

[0050] The closed cooling tower 100 includes a circulating cooling component 110 and a refrigerant circulating component 120; wherein the refrigerant circulating component 120 is used to communicate with the evaporator 115 in the circulating cooling component 110, thereby forming a refrigerant circulation loop to transport the refrigerant to the evaporator 115, so that the evaporator 115 can cool the cooling water;

[0051] The spray unit 113 uses the cooling water cooled by heat exchange with the evaporator 115 to cool the soft water heat exchange coil 114, and the cooling water heated by heat exchange with the soft water heat exchange coil 114 flows to the evaporator 115, thereby forming a cooling water cycle;

[0052] During the circulation process, the soft water in the soft water heat exchange coil 114 can be cooled.

[0053] Specifically, taking the spraying of cooling water from the spray unit 113 as the starting point of the process as an example, since the spray unit 113 and the soft water heat exchange coil 114 are both arranged in the soft water circulation box 111, and the evaporator 115 is arranged in the cooling water circulation box 112, and the cooling water is demineralized water, therefore, when the spray unit 113 sprays cooling water toward the soft water heat exchange coil 114, the cooling water in contact with the soft water heat exchange coil 114 will exchange heat with the soft water in the soft water heat exchange coil 114, thereby cooling the soft water in the soft water heat exchange coil 114. In this process, the cooling water is relatively closed in the closed cooling tower 100, so that it will not splash to the outside, so that the amount of cooling water can be guaranteed in this way, and at the same time, heat loss can be reduced;

[0054] Then, the cooling water after heat exchange with the soft water heat exchange coil 114 will flow to the evaporator 115, and after heat exchange with the evaporator 115, the temperature will be reduced, and then flow to the bottom of the cooling water circulation box 112 for temporary storage; then, the cooling water will be pumped to the spray unit 113 under the action of the cooling water circulation pump 116, thereby realizing the circulation of the cooling water;

[0055] In the aforementioned process, since the cooling water is demineralized water, the fans and corrugated packings of the traditional closed tower are eliminated, thereby reducing the scale formed in the soft water circulation box 111 and the cooling water circulation box 112, thereby maintaining the heat exchange efficiency and further maintaining the cooling effect of the soft water; at the same time, this method can eliminate the problems of large evaporation, scaling of coils and packing affecting the heat exchange efficiency, and thus can reduce the maintenance cost;

[0056] Moreover, when cooling the cooling water, the refrigerant circulation component 120 is connected to the evaporator 115 to form a refrigerant circulation, so that the refrigerant can be used to cool the cooling water, that is, the circulating cooling water can be temperature-controlled by means of refrigeration and heat dissipation, and the evaporator 115 is directly placed inside, so that while improving the cooling, the temperature loss can be reduced, the temperature fluctuation can be reduced, and the energy consumption can be reduced; thereby effectively solving the problems of insufficient cooling in summer due to traditional closed towers and stopping the tower for heating due to excessively cold weather in winter, effectively solving the problem of insufficient utilization of cooling towers in all seasons, and effectively eliminating traditional closed tower water replenishment and cooling in summer, so as to achieve efficient, energy-saving and effective cooling in all seasons.

[0057] For further information, please refer to Figure 1 In this embodiment, when configuring the refrigerant circulation component 120, it may include a refrigeration box 121, a heat dissipation fan 122, a compressor 123 and a condenser 124; the refrigeration box 121 is configured with an inner cavity and a heat dissipation duct connected to the inner cavity, and the heat dissipation fan 122 is configured in the heat dissipation duct; the compressor 123 and the condenser 124 are both configured in the inner cavity, and the condenser 124 is connected to the compressor 123; wherein the refrigerant inlet of the compressor 123 is connected to the refrigerant outlet of the evaporator 115, and the refrigerant outlet of the condenser 124 is connected to the refrigerant inlet of the evaporator 115. Thus, the low-temperature, low-pressure, gaseous refrigerant is sent to the compressor 123, and becomes the high-temperature, high-pressure, gaseous refrigerant and is sent to the condenser 124. After being cooled by the condenser 124, it becomes the liquid refrigerant with a lower temperature and is sent to the expansion valve. After passing through the expansion valve, it becomes the low-temperature, low-pressure, liquid refrigerant and is sent out. The heat dissipation fan 122 works to suck in the external cold air from the air inlet duct, and blows it out after heat exchange through the fins of the condenser 124.

[0058] In the present embodiment, when configuring the spray unit 113, the method adopted is to spray cooling water onto the soft water heat exchange coil 114 through the spray unit 113, the purpose of which is to increase the amount of water that contacts the soft water heat exchange coil 114 for heat exchange, thereby improving the heat exchange efficiency. Therefore, the present embodiment adopts the method of arranging the spray unit 113 directly above the soft water heat exchange coil 114, and the spray unit 113 can be appropriately adjusted according to the structural size of the soft water heat exchange coil 114, so that the spray area can cover the soft water heat exchange coil 114 as much as possible; specifically, when configuring the spray unit 113, a method of setting a plurality of nozzles, each of which is provided with a nozzle.

[0059] Thus, the cooling water with desalted water as the medium is pumped into the spray unit 113 and sprayed out through the cooling water circulation pump 116. The cooling water passes through the soft water heat exchange coil 114, and the flow rate is slowed down. After heat exchange with the soft water in the soft water heat exchange coil 114, hot cooling water is formed and drips into the evaporator 115. The evaporator 115 has dense fins. The hot cooling water passes through the fins and the flow rate is slowed down. After heat exchange with the refrigerant in the evaporator 115, low-temperature cooling water is formed and drips into the bottom of the cooling water circulation box 112 to complete a cycle.

[0060] In the soft water heat exchange coil 114, the high temperature soft water is cooled by contact with the cooling water to form low temperature soft water for delivery. In the evaporator 115, the low temperature, low pressure, liquid refrigerant is contacted with the cooling water to form low temperature, low pressure, gaseous refrigerant and is delivered to the subsequent refrigerant circulation component 120 for treatment.

[0061] In the closed cooling tower 100, a soft water circulation box 111 and a cooling water circulation box 112 are arranged, and the soft water circulation box 111 and the cooling water circulation box 112 are isolated from the outside. Therefore, the soft water circulation box 111 can be arranged above the cooling water circulation box 112, and the boundary between the soft water circulation box 111 and the cooling water circulation box 112 is connected, so that the cooling water after flowing through the soft water heat exchange coil 114 flows to the evaporator 115 under the action of gravity. Therefore, in this way, the internal structure can be simplified, so that the circulation efficiency of the cooling water can be improved.

[0062] Please refer to Figure 1 Moreover, in the present embodiment, in order to detect the temperature of the soft water, a first temperature sensor and a second temperature sensor are respectively provided at the water inlet and the water outlet of the soft water heat exchange coil 114; in addition, in order to detect the temperature of the cooling water, a third temperature sensor is provided at the water inlet or the water outlet of the cooling water circulation pump 116.

[0063] It should be noted that, through the above-mentioned structural arrangement, the temperature of the soft water flowing into the closed cooling tower 100 can be detected according to the first temperature sensor, the second temperature sensor and the third temperature sensor, the temperature of the soft water flowing out of the closed cooling tower 100 can be detected, and the temperature of the cooling water to be heat exchanged with the soft water heat exchange coil 114 can be detected, so that in this way, it is beneficial to control the overall heat exchange temperature, heat exchange efficiency and heat exchange state; for example, according to the cooling demand of the soft water, the refrigerant circulation component 120 can be controlled, so as to control the amount and temperature of the refrigerant introduced into the evaporator 115, and then realize the control of the temperature of the cooling water, so that in this way, while meeting the cooling demand of the soft water, the temperature difference of the cooling can be reduced, the temperature fluctuation can be reduced, and the operating energy consumption can be reduced; and when configuring the above-mentioned structure, the refrigerant circulation component 120 can adopt a variable frequency refrigerant circulation component 120, and the cooling water circulation pump 116 can adopt a variable frequency pump body to reduce the overall energy consumption.

[0064] For further information, please refer to Figure 1 and Figure 2 In this embodiment, it can be seen from the above content that when the cooling water exchanges heat with the soft water heat exchange coil 114, the spray unit 113 is used to spray out the heat for heat exchange. On this basis, in order to extend the heat exchange time between the cooling water and the soft water heat exchange coil 114 and improve the heat exchange efficiency, the soft water heat exchange coil 114 can also be immersed in the cooling water. It should be noted that the aforementioned spray heat exchange and immersion heat exchange methods can be adaptively adjusted according to the usage scenario and needs;

[0065] Based on this, in order to enable the closed cooling tower 100 to switch between the spray heat exchange and the immersion heat exchange, a first fixed baffle 141, a first movable baffle 142 and a first driving member 143 are provided at the boundary between the soft water circulation box 111 and the cooling water circulation box 112;

[0066] The first fixed partition plate 141 is provided with a plurality of first water guide holes 144 in an array, and the first water guide holes 144 connect the soft water circulation box 111 with the cooling water circulation box 112;

[0067] The first movable partition 142 is movably connected to the first fixed partition 141, and the first driving member 143 is connected to the first fixed partition 141 and is used to drive the first movable partition 142 to move relative to the first fixed partition 141 to block all the first water guide holes 144, or at least partially open all the first water guide holes 144.

[0068] Through the above-mentioned structural setting, the first movable partition 142 can be driven by the first driving member 143, so as to adjust the conduction state of the first water guide hole 144 on the first fixed partition 141, so that the soft water circulation box 111 and the cooling water circulation box 112 are connected or blocked; when the first water guide hole 144 on the first fixed partition 141 is closed, the soft water circulation box 111 and the cooling water circulation box 112 are blocked. At this time, the soft water circulation box 111 has the function of collecting water. At this time, it can store a certain amount of cooling water, and when the liquid level of the cooling water in the soft water circulation box 111 reaches a certain amount, the demand for immersion heat exchange of the soft water heat exchange coil 114 can be realized;

[0069] Thus, by adjusting the conduction state of the first water guide hole 144 on the first fixed partition 141, the efficiency of guiding the cooling water in the soft water circulation box 111 to the cooling water circulation box 112 can be adjusted, that is, according to the use requirements, the water collection amount in the soft water circulation box 111 is adjusted, or no water is collected in the soft water circulation box 111, thereby accelerating the circulation efficiency of the cooling water. It should be noted that such a setting method can adjust the circulation efficiency of the cooling water, which is conducive to cooling according to the use requirements, and further conducive to reducing energy consumption.

[0070] Among them, when the soft water circulation box 111 has a water collection function, in order to detect the amount of cooling water in the soft water circulation box 111, a first liquid level gauge is provided in the soft water circulation box 111. The first liquid level gauge is located above the first fixed partition 141. Through such a water level detection method, the water level in the soft water circulation box 111 can be prevented from being too high, which may affect the normal operation of the heat exchange or cause equipment failure.

[0071] The structure of the first fixed partition 141 is the same as that of the first fixed partition 141. Figure 1 and Figure 2 In this embodiment, based on the above structure, a second fixed baffle 151, a second movable baffle 152 and a second driving member 153 may be provided in the cooling water circulation box 112;

[0072] The second fixed baffle 151 is located below the evaporator 115, and the second fixed baffle 151 is provided with a plurality of second water guide holes 154 in an array; the second movable baffle 152 is movably connected to the second fixed baffle 151, and the second driving member 153 is connected to the second fixed baffle 151 and is used to drive the second movable baffle 152 to move relative to the second fixed baffle 151, so as to block all the second water guide holes 154, or at least partially open all the second water guide holes 154;

[0073] The connection point between the cooling water circulation pump 116 and the cooling water circulation box 112 is located below the second fixed partition plate 151 .

[0074] Through the above-mentioned structural setting, the second movable partition 152 can be driven by the second driving member 153, so as to adjust the conduction state of the second water guide hole 154 on the second fixed partition 151, so that the cooling water circulation box 112 is divided into a water storage part and a part for heat exchange with the evaporator 115; and when the first water guide hole 144 on the second fixed partition 151 is closed, the cooling water circulation box 112 is divided into a water storage part and a part for immersion heat exchange with the evaporator 115, which can slow down the heat exchange and circulation efficiency of the cooling water, and when the liquid level of the cooling water in the cooling water circulation box 112 reaches a certain amount, the requirement for immersion heat exchange of the evaporator 115 can be realized;

[0075] Thus, by adjusting the conduction state of the second water guide hole 154 on the second fixed partition 151, the efficiency of heat exchange between the cooling water in the cooling water circulation box 112 and the evaporator 115 can be adjusted, as well as the amount of cooling water that can be circulated; that is, the amount of water collected in the cooling water circulation box 112 can be adjusted according to the use requirements. It should be noted that such a setting method can adjust the circulation efficiency of the cooling water, which is conducive to cooling according to the use requirements, and further conducive to reducing energy consumption.

[0076] Among them, when the cooling water circulation box 112 has a water collection function, in order to detect the amount of cooling water in the cooling water circulation box 112, a second liquid level gauge is provided in the cooling water circulation box 112. The second liquid level gauge is located above the second fixed partition 151. Through such a water level detection method, the water level in the cooling water circulation box 112 can be prevented from being too high, which may affect the normal operation of the heat exchange or cause equipment failure.

[0077] It should be noted that, from the above content, please refer to Figure 1 and Figure 2 On the basis of the above structure, the soft water circulation box 111 and the cooling water circulation box 112 both have the function of collecting water. Therefore, when one or both of the soft water circulation box 111 and the cooling water circulation box 112 are in a water collecting state, the amount of cooling water that can be circulated in the closed cooling tower 100 will be reduced. Therefore, in the present embodiment, the closed cooling tower 100 is also provided with a water replenishment structure, the function of which is to replenish water when the amount of cooling water that can be circulated is reduced and affects the circulation heat exchange efficiency. When the water collection position inside the closed cooling tower 100 starts to drain, that is, when the amount of water collected in the soft water circulation box 111 and the cooling water circulation box 112 is reduced or no water is collected, the excess cooling water inside the closed cooling tower 100 can be discharged.

[0078] Specifically, to achieve the above-mentioned effects, the closed cooling tower 100 further includes a water supply tank 161, a water supply evaporator 162 and a water supply pump 163;

[0079] The water replenishment evaporator 162 is accommodated in the water replenishment tank 161, and the water replenishment evaporator 162 is connected to the refrigerant circulation component 120; the water inlet end of the water replenishment pump 163 is connected to the water replenishment tank 161, and its discharge end is connected to the water inlet of the cooling water circulation pump 116 or the spray unit 113.

[0080] By such a setting, a water replenishment tank 161 can be configured, and a water replenishment evaporator 162 is configured in the water replenishment tank 161. The water replenishment evaporator 162 has the same function as the above-mentioned evaporator 115, and is used to reduce the temperature of the cooling water. Therefore, in this way, the temperature of the cooling water in the water replenishment tank 161 can be controlled, so as to avoid the temperature difference between the temperature of the cooling water discharged from the water replenishment tank 161 and the temperature of the circulating cooling water inside it during the water replenishment process, which causes the temperature fluctuation of the soft water or the reduction of the heat exchange efficiency; and when configuring the water replenishment tank 161, the water replenishment tank 161 is configured below the cooling water circulation box 112, and is connected to the cooling water circulation box 112 through the water conduit 164, and the water conduit 164 is provided with an on-off valve 165, and the state of the water conduit 164 can be controlled by the on-off valve 165, so that the cooling water circulation box 112 and the water replenishment tank 161 are connected or blocked.

[0081] Based on the above content, it is also necessary to explain that the closed cooling tower 100 can realize an intelligent control unit, which detects the inlet and outlet temperatures of soft water and the temperature of cooling water, so as to compare it with the preset soft water cooling temperature. If the temperature is too high, the cooling water circulation pump 116 is controlled to increase the circulation volume, and the compressor 123 is controlled to increase the speed to enhance refrigeration. If the temperature is too low, the opposite is true; the control logic is to control the compressor 123 first, and then control the flow of the cooling water circulation pump 116, so as to maximize the energy consumption efficiency.

[0082] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A closed cooling tower, characterized in that: The closed cooling tower includes a circulating cooling component and a refrigerant circulating component; The circulating cooling component includes a soft water circulation box, a cooling water circulation box, a spray unit, a soft water heat exchange coil, an evaporator and a cooling water circulation pump; The spray unit and the soft water heat exchange coil are both arranged in the soft water circulation box, and the spray unit is used to spray cooling water toward the soft water heat exchange coil, and the soft water heat exchange coil is connected to an external soft water pipeline; The evaporator is arranged in the cooling water circulation box and is used to receive the cooling water after flowing through the soft water heat exchange coil; the cooling water circulation pump is connected with the cooling water circulation box and the spray unit to pump the cooling water in the cooling water circulation box to the spray unit; The refrigerant circulation assembly is connected to the top of the soft water circulation tank or to the bottom of the cooling water circulation tank, and is in communication with the evaporator; Wherein, the cooling water is desalted water.

2. The closed cooling tower according to claim 1, characterized in that: The refrigerant circulation assembly includes a refrigeration box, a heat dissipation fan, a compressor and a condenser; The refrigeration box is configured with an inner cavity and a heat dissipation duct connected to the inner cavity, and the heat dissipation fan is configured in the heat dissipation duct; the compressor and the condenser are both configured in the inner cavity, and the condenser is connected to the compressor; The refrigerant inlet of the compressor is communicated with the refrigerant outlet of the evaporator, and the refrigerant outlet of the condenser is communicated with the refrigerant inlet of the evaporator.

3. The closed cooling tower according to claim 1, characterized in that: The spray unit is located directly above the soft water heat exchange coil; The soft water circulation box is arranged above the cooling water circulation box, and the soft water circulation box is connected to the cooling water circulation box at a critical point, so that the cooling water flowing through the soft water heat exchange coil flows to the evaporator under the action of gravity.

4. The closed cooling tower according to claim 1, characterized in that: A first temperature sensor and a second temperature sensor are respectively provided at the water inlet and the water outlet of the soft water heat exchange coil; A third temperature sensor is arranged at the water inlet or the water outlet of the cooling water circulation pump.

5. The closed cooling tower according to claim 1, characterized in that: A first fixed baffle, a first movable baffle and a first driving member are provided at the boundary between the soft water circulation box and the cooling water circulation box; The first fixed partition is provided with a plurality of first water guide holes in an array, and the first water guide holes connect the soft water circulation box with the cooling water circulation box; The first movable baffle is movably connected to the first fixed baffle, and the first driving member is connected to the first fixed baffle and is used to drive the first movable baffle to move relative to the first fixed baffle to block all of the first water guide holes, or at least partially open all of the first water guide holes.

6. The closed cooling tower according to claim 5, characterized in that: A first liquid level gauge is arranged in the soft water circulation box, and the first liquid level gauge is located above the first fixed partition.

7. A closed cooling tower according to any one of claims 1 to 6, characterized in that: The cooling water circulation box is provided with a second fixed baffle, a second movable baffle and a second driving member; The second fixed baffle is located below the evaporator, and the second fixed baffle is provided with a plurality of second water guide holes in an array; the second movable baffle is movably connected to the second fixed baffle, and the second driving member is connected to the second fixed baffle and is used to drive the second movable baffle to move relative to the second fixed baffle, so as to block all the second water guide holes, or at least partially open all the second water guide holes; Wherein, the connection point between the cooling water circulation pump and the cooling water circulation box is located below the second fixed partition.

8. The closed cooling tower according to claim 7, characterized in that: A second liquid level gauge is arranged in the cooling water circulation box, and the second liquid level gauge is located above the second fixed partition.

9. The closed cooling tower according to claim 1, characterized in that: The closed cooling tower also includes a water supply tank, a water supply evaporator and a water supply pump; The water-making evaporator is accommodated in the water-making tank, and the water-making evaporator is connected to the refrigerant circulation component; the water inlet end of the water-making pump is connected to the water-making tank, and the water discharge end thereof is connected to the water inlet of the cooling water circulation pump or the spray unit.

10. The closed cooling tower according to claim 9, characterized in that: The water replenishment tank is arranged below the cooling water circulation tank and is connected with the cooling water circulation tank through a water pipe, and an on-off valve is provided on the water pipe.

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