Industrial refrigerator internet of things control system and method

Abstract

The invention relates to the technical field of refrigerators, in particular to an industrial refrigerator internet of things control system and method, which comprises a water tank, a refrigerant circulation module, a distribution pump, a cooling tower and a control module, and a first control pipeline in the water tank, a second control pipeline in the water tank, a first detection unit and the refrigerant circulation module are respectively connected with the control module. The water tank with three sections is arranged, the pipeline structure between the refrigerant circulation module and the cooling water circulation module is adaptively improved, control over the refrigerant circulation module is physically isolated from fluctuation influences of the cooling tower and the cooling object, and the water tank and the refrigerant circulation module are managed and controlled based on information obtained in real time through the Internet of Things; the refrigerant circulation module can operate stably for a long time, the frequency conversion control frequency of the refrigerant circulation module is effectively reduced, the risks of equipment shutdown and damage are reduced, the service life of the refrigerant circulation module is prolonged, and the working stability and safety of the system are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigerators, in particular to an industrial refrigerator Internet of Things control system and method. BACKGROUND

[0002] Industrial refrigerators are indispensable equipment in industrial production, covering manufacturing, food and beverage, medicine, chemical industry, electronics, new energy and other fields, including a refrigerant circulation system, a water circulation system and an electrical control system. The refrigerant circulation system circulates refrigerant between a compressor, a condenser, an expansion valve and an evaporator to complete heat absorption and heat release, thereby reducing high-temperature water to cooling water. The water circulation system circulates cooling water to a cooling device by a water pump, absorbs heat and returns to the evaporator in the refrigerant circulation system to form a cooling water circulation. The electrical control system realizes automatic start-stop and safety protection through a temperature controller and a pressure protection device.

[0003] In actual application, a cooling tower is used in combination with an industrial refrigerator to participate in refrigeration work on cooling water in a low-temperature environment to reduce system energy consumption. However, the applicant found in the process of implementing the present application that the combined application of the cooling tower and the industrial refrigerator may reduce the service life of the refrigerant circulation system and even cause unplanned shutdown due to the superimposed effects of environmental temperature fluctuations and the working state of the cooling device. SUMMARY

[0004] The purpose of the present application is to provide an industrial refrigerator Internet of Things control system and method to solve the above technical problems in the prior art.

[0005] The present application is implemented as follows: In a first aspect, the present application provides an industrial refrigerator Internet of Things control system, comprising: a water tank, the water tank comprising a buffer area, a circulation area and a storage area, the circulation area being in communication with the storage area through a first control pipeline, the buffer area being in communication with the circulation area through a second control pipeline, a first detection unit being arranged on the water tank, the first detection unit being used to detect the water level and the water temperature in the circulation area; a refrigerant circulation module, the refrigerant circulation module being connected with the circulation area, the refrigerant circulation module being used to reduce the water temperature in the circulation area to a first preset temperature; a distribution pump, the storage area being connected with a cooling object through the distribution pump, the distribution pump being used to deliver the cooling water in the storage area to the cooling object for cooling treatment; a cooling tower, the cooling object being connected with the buffer area through the cooling tower, the cooling tower being used to cool the passing water; A control module, the first control pipeline, the second control pipeline, the first detection unit and the refrigerant circulation module are connected with the control module, and the control module is configured to: when the water temperature in the circulation area decreases to a first preset temperature, control the first control pipeline to guide the water in the circulation area into the storage area, and then when the water level in the circulation area decreases to a first preset water level, control the second control pipeline to guide the water from the buffer area to the circulation area to the second water level.

[0006] In a second aspect, the application provides an industrial refrigeration machine Internet of Things control method, which is based on the above system and includes the following steps: when the water temperature in the circulation area decreases to a first preset temperature, control the first control pipeline to guide the water in the circulation area into the storage area, and then when the water level in the circulation area decreases to a first preset water level, control the second control pipeline to guide the water from the buffer area to the circulation area to the second water level; and after the water is guided by the second control pipeline, determine the power of the refrigerant circulation module based on the water level and the water temperature in the circulation area.

[0007] The technical scheme provided by the application can achieve the following beneficial effects: The application sets a three-section water tank, and adapts and improves the pipeline structure and control method between the refrigerant circulation module and the cooling water circulation module, physically isolates the control of the refrigerant circulation module from the fluctuation influence of the cooling tower and the cooling object, controls the water tank and the refrigerant circulation module based on the real-time information obtained by the Internet of Things, enables the refrigerant circulation module to run in a long-term stable state, avoids the fluctuation influence of the cooling tower and the cooling object, effectively reduces the frequency of variable frequency control of the refrigerant circulation module, reduces the risk of equipment downtime and damage, prolongs the service life of the refrigerant circulation module, and improves the working stability and safety of the system. BRIEF DESCRIPTION OF DRAWINGS

[0008] In order to more clearly illustrate the technical scheme in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and those skilled in the art can also obtain other drawings according to these drawings without any creative effort.

[0009] Figure 1 is a pipeline connection schematic diagram of the industrial refrigeration machine Internet of Things control system of the application; Figure 2 is a module connection schematic diagram of the refrigerant circulation module of the application; Figure 3 is a module connection schematic diagram of the industrial refrigeration machine Internet of Things control system of the application; Figure 4 is a flow chart of the industrial refrigeration machine Internet of Things control method of the present application.

[0010] In the figure: 100, water tank; 110, first control pipeline; 120, second control pipeline; 130, circulating pipeline; 200, refrigerant circulating module; 210, compressor; 220, condenser; 230, expansion valve; 240, evaporator; 300, cooling object; 400, cooling tower; 500, output pipe; 510, three-way valve; 600, distribution pump; 710, first detection unit; 720, second detection unit. DETAILED DESCRIPTION

[0011] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described in detail below. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0012] In the specification and claims, "and / or" means at least one of the connected objects, and the character " / " generally means that the front and rear associated objects are in an "or" relationship.

[0013] The system in the prior art uses a cooling tower to cooperate with a water chiller. Although the system can reduce system energy consumption in a low-temperature environment, on the one hand, the temperature in a low-temperature environment is dynamically changed (such as the temperature difference between day and night, and the temperature difference change caused by extreme weather), resulting in uncertainty of the refrigerating capacity provided by the cooling tower, and on the other hand, for some intermittent working refrigeration objects, such as a thermoplastic mold, the refrigeration demand thereof is also dynamically changed in different working states. Although the prior art adjusts the refrigerant circulating module by frequency conversion to cope with the fluctuations caused by the cooling tower and the refrigeration object, the control complexity of the system causes the frequency conversion frequency of the refrigerant circulating module to be too fast, and in an extreme case, the frequency fluctuation amplitude is too large, which affects the service life of the refrigerant circulating module, and even may trigger the overcurrent and overload protection of the frequency converter, causing unplanned shutdown.

[0014] To this end, an industrial refrigeration machine Internet of Things control system and method are provided, which physically isolate the control of the refrigerant circulation module from the fluctuation of the cooling tower and the cooling object by setting a three-section water tank and adapting the pipe structure and control method between the improved refrigerant circulation module and the cooling water circulation module, and control the water tank and the refrigerant circulation module based on the real-time information obtained by the Internet of Things, so that the refrigerant circulation module can run stably for a long time, avoid the fluctuation of the cooling tower and the cooling object, effectively reduce the frequency of variable frequency control of the refrigerant circulation module, reduce the risk of equipment downtime and damage, prolong the service life of the refrigerant circulation module, improve the working stability and safety of the system, and the specific embodiments are as follows.

[0015] Embodiment 1 The embodiment provides an industrial refrigeration machine Internet of Things control system, as shown in the figure, which comprises: Figures 1-3 a water tank 100, the water tank 100 comprising a buffer zone, a circulation zone and a storage zone, the circulation zone being in communication with the storage zone through a first control pipe 110, and the buffer zone being in communication with the circulation zone through a second control pipe 120, a first detection unit 710 being arranged on the water tank 100, and the first detection unit 710 being used for detecting the water level and water temperature in the circulation zone; a refrigerant circulation module 200, the refrigerant circulation module 200 being connected with the circulation zone, and the refrigerant circulation module 200 being used for reducing the water temperature in the circulation zone to a first preset temperature; a distribution pump 600, the storage zone being connected with a cooling object 300 through the distribution pump 600, and the distribution pump 600 being used for delivering the cooling water in the storage zone to the cooling object 300 for cooling treatment; a cooling tower 400, the cooling object 300 being connected with the buffer zone through the cooling tower 400, and the cooling tower 400 being used for cooling the passing water; a control module, the first control pipe 110, the second control pipe 120, the first detection unit 710 and the refrigerant circulation module 200 being connected with the control module respectively, and the control module being configured to: when the water temperature in the circulation zone is reduced to the first preset temperature, control the first control pipe 110 to guide the water in the circulation zone into the storage zone, and then when the water level in the circulation zone is reduced to a first preset water level, control the second control pipe 120 to guide water from the buffer zone into the circulation zone so that the water level in the circulation zone is at a second water level; the control module is further configured to: after the second control pipe 120 completes the water guiding, determine the power of the refrigerant circulation module based on the water level and water temperature in the circulation zone.

[0016] ​The dynamic change of the outdoor ambient temperature can cause the fluctuation of the provided refrigeration capacity, and the working state change of the cooling object 300 can also affect the return water stability of the cooling object 300. To avoid the superimposed effects of the two, in the working process, the embodiment sets three sections of the water tank 100, so that the buffer area collects the return water of the cooling object 300, the storage area stores and stably provides the cooling water for the cooling object 300, and the circulation area cooperates with the refrigerant circulation module 200 to cool part of the return water. The first control pipeline 110 and the second control pipeline 120 block the communication between the three sections, so as to physically isolate the control of the refrigerant circulation module 200 from the fluctuation effects of the cooling tower 400 and the cooling object 300, and to control the water tank 100 and the refrigerant circulation module 200 based on the information obtained in real time by the Internet of Things. In a single refrigeration cycle of the refrigerant circulation module 200 to the water in the circulation area, the single cycle water refrigeration working duration is set to be certain (denoted as t), the total amount of water to be treated can be determined based on the water level in the circulation area, the temperature difference ΔT between the current water temperature in the circulation area and the first preset temperature, the heat calculation formula Q = cmΔT, and the heat conversion formula P = Q / t, so that the power P of the refrigerant circulation module 200 can be determined. The refrigerant circulation module 200 can maintain a stable power P in a processing time t and will not be affected by the fluctuations of the cooling tower 400 and the cooling object 300. After the high-temperature return water is reduced to the first preset temperature, the water in the circulation area is guided into the storage area through the first control pipeline 110 until the water level in the circulation area is reduced from the second water level to the first water level. At this time, the water reserved in the circulation area can enable the refrigerant circulation module 200 to continue normal work without stopping the refrigerant circulation module 200, and then the first control pipeline 110 is closed. At the same time, the return water is guided into the circulation area from the buffer area through the second control pipeline 120 until the water level in the circulation area rises to the second water level. At this time, the second control pipeline 120 is closed, and then the power of the refrigerant circulation module 200 is determined and adjusted based on the water level and temperature in the circulation area, so as to effectively reduce the frequency of frequency conversion control of the refrigerant circulation module 200, reduce the risk of equipment shutdown and damage, prolong the working life of the refrigerant circulation module 200, and improve the working stability and safety of the system.

[0017] In some embodiments, to reduce the adjustment frequency of the power of the refrigerant circulation module 200, the first detection unit 710 can also be configured to detect the water temperature in the buffer area, and the control module can also be configured to determine the second water level based on the water temperature in the buffer area. Based on the above design, when the return water temperature in the buffer area is affected by the fluctuations of the cooling tower 400 and the cooling object 300, the refrigerant circulation module 200 has maintained a power P in a working state, and the heat Q treated by the refrigerant circulation module 200 in a single refrigeration cycle is constant due to the certain single refrigeration cycle time t in the circulation area. Before the second control pipeline 120 is opened, the water temperature T in the buffer area is obtained firsth According to the water temperature T in the buffer zone h The temperature difference ΔT between the temperature and the first preset temperature T1 is ΔT = T. h -T1, combined with the heat calculation formula m h =Q / (c*ΔT) can be used to determine the mass m of return water that needs to be introduced from the buffer zone into the circulation zone while the refrigerant circulation module 200 remains in a constant operating state. h The density of the return water and the structural volume of the circulation zone can be calculated in advance, allowing for the determination of the mass m to be introduced into the circulation zone. h After the return water, the water level in the circulation zone will rise to the second water level. Then, the control module can introduce mass m into the circulation zone through the second control pipeline 120. h The return water ensures that the refrigerant circulation module 200 can reduce the water temperature in the circulation zone to the first preset stable level within a predetermined time t while maintaining constant power. This allows the refrigerant circulation module 200 to operate in a stable state for a long time, avoiding the fluctuations of the cooling tower 400 and the object being cooled 300. It also effectively reduces the frequency of frequency conversion control of the refrigerant circulation module 200, reduces the risk of equipment downtime and damage, and improves the stability and safety of the system.

[0018] In some embodiments, to avoid the refrigerant circulation module 200 operating under load due to the low return water temperature in the buffer zone when the cooling tower 400 provides a large amount of cooling capacity, the control module can be further configured to: control the refrigerant circulation module 200 to stop working when the water temperature in the buffer zone is below a second preset temperature, and the first control pipeline 110 and the second control pipeline 120 cooperate to directly introduce the water in the buffer zone into the storage zone, wherein the second preset temperature is higher than the first preset temperature. When the outdoor ambient temperature is low, the return water from the object being cooled drops below the first preset temperature after passing through the cooling tower 400. At this point, the refrigerant circulation module 200 can be stopped, allowing the return water to pass through the buffer zone, circulation zone, and storage zone sequentially, where it is stored for later use. When the return water from the object being cooled drops to between the first and second preset temperatures after passing through the cooling tower 400, the refrigerant circulation module 200 can also be stopped, allowing the return water to pass through the buffer zone, circulation zone, and storage zone sequentially. The temperature of the return water is neutralized by the cooling water stored in the storage zone. Since the amount of stored cooling water is greater than the amount of return water, the temperature fluctuation in the storage zone is effective, allowing for normal cooling of the object being cooled and preventing the refrigerant circulation module 200 from operating under load. When the return water from the object being cooled drops above the second preset temperature after passing through the cooling tower 400, the refrigerant circulation module 200 can operate at the lower limit of its safe power, effectively reducing system energy consumption and improving resource utilization.

[0019] In some embodiments, to reduce the frequency of adjustment of the refrigerant circulation module 200, the control module can be further configured to control the refrigerant circulation module 200 to work at a constant power when the water temperature in the buffer zone is between a second preset temperature and a third preset temperature, and determine the amount of water introduced from the buffer zone to the circulation zone by the second control pipeline 120 based on the temperature difference between the water temperature in the buffer zone and the first preset temperature. The third preset temperature is higher than the second preset temperature. Based on the amount of water introduced from the buffer zone to the circulation zone not exceeding the upper limit of the circulation zone, the amount of water introduced from the buffer zone to the circulation zone is dynamically adjusted according to the fluctuation of the water temperature in the buffer zone over time, according to the refrigeration processing amount Q of the refrigerant circulation module 200 within a set time t, and the temperature difference ΔT between the water temperature in the buffer zone and the first preset temperature, so that after the water is introduced to the circulation zone each time, the refrigerant circulation module 200 can reduce the water temperature in the circulation zone to the first preset temperature within the set time t at a constant power, thereby ensuring long-term stable operation of the refrigerant circulation module 200 and the system and improving the service life of the refrigerant circulation module 200 and the system.

[0020] In some embodiments, to ensure stable operation of the system, the control module can be further configured to control the amount of water introduced from the buffer zone to the circulation zone by the second control pipeline 120 to be constant when the water temperature in the buffer zone is above the third preset temperature, and determine the power of the refrigerant circulation module 200 based on the temperature difference between the water temperature in the buffer zone and the first preset temperature. In the case that the cooling capacity provided by the cooling tower 400 is insufficient or the cooling demand of the cooling object 300 increases, the water temperature in the buffer zone will increase. To ensure that sufficient cooling water is supplied to the storage zone in a timely manner to meet the cooling demand of the cooling object 300, the power of the refrigerant circulation module 200 can be determined according to the demand for supplying cooling water to the storage zone, the temperature difference between the water temperature in the buffer zone and the first preset temperature, the heat calculation formula and the heat release formula, so that the refrigerant circulation module 200 can reduce the water temperature in the circulation zone to the first preset temperature within a set time t, and supply the water to the storage zone through the first control pipeline in a timely manner, thereby ensuring long-term stable operation of the system.

[0021] In some embodiments, to facilitate the coordinated control of the cooling tower 400 and the refrigerant circulation module 200, the cooling object can be connected to the buffer zone via an output pipe 500. The cooling tower 400 and the output pipe 500 are connected in parallel. The system also includes a second detection unit 720, which detects the temperature of the return water output from the cooling object 300 and the outdoor ambient temperature. The second detection unit 720 is connected to a control module, which is further configured to determine whether the cooling tower 400 or the output pipe is used as the channel for introducing water from the cooling object to the buffer zone based on the temperature difference between the return water temperature of the cooling object 300 and the outdoor ambient temperature. When the outdoor temperature is high and the cooling tower 400 cannot provide or can only provide limited cooling capacity, the return water from the cooling object 300 can flow directly into the buffer zone through the output pipe 500. When the outdoor temperature is low, the return water from the cooling object 300 can pass through the cooling tower 400 before flowing into the buffer zone, reducing system energy consumption. Specifically, the object being cooled 300 is connected to the cooling tower 400 and the output pipe 500 via a three-way valve 510. The three-way valve 510 is connected to a control module, which controls the return water flowing out of the object being cooled 300 to pass through either the cooling tower 400 or the output pipe 500. Preferably, the output pipe 500 is located indoors.

[0022] In some embodiments, to reduce energy consumption, the buffer zone, circulation zone, and storage zone can be arranged sequentially from top to bottom along the direction of gravity; allowing the return water to be naturally drawn from the buffer zone into the circulation zone and from the circulation zone into the storage zone under the influence of gravity, thereby reducing energy consumption.

[0023] Specifically, to facilitate the on / off control of the first control pipeline 110, the first control pipeline 110 can be configured to include a first pipe and a first control valve disposed on the first pipe. The first control valve is connected to the control module and controls the on / off of the first control pipeline 110.

[0024] Specifically, to facilitate the on / off control of the second control pipeline 120, the second control pipeline 120 can be configured to include a second pipe and a second control valve disposed on the second pipe. The second control valve is connected to the control module and controls the on / off of the second control pipeline 120.

[0025] In some embodiments, to facilitate providing sufficient cooling water to the object being cooled to meet refrigeration requirements, the system may further include an acquisition module. The acquisition module is used to acquire the working status of the object being cooled 300. The acquisition module and the delivery pump 600 are respectively connected to the control module. The control module is further configured to determine the power of the delivery pump 600 based on the working status of the object being cooled 300, so as to adjust the amount of water delivered to the object being cooled 300 to meet the refrigeration requirements of the object being cooled 300.

[0026] In some embodiments, to achieve the refrigerant circulation module 200 to cool the water in the circulation area, as shown in Figure 1 and Figure 2 , the refrigerant circulation module 200 can be provided to include a compressor 210, a condenser 220, an expansion valve 230 and an evaporator 240 connected in turn in a ring shape, and the circulation area is heat exchange connected with the evaporator 240 through the circulation pipeline 130.

[0027] It should be noted that the control module is a prior art, which can be specifically provided with a control chip with a control program, the first detection unit 710 and the second detection unit 720 are prior arts, which can be specifically sensors with temperature and / or flow detection functions, and the acquisition module is a prior art, which can be specifically a sensor with temperature, pressure and / or displacement detection functions.

[0028] Embodiment 2 The present embodiment provides an industrial refrigeration machine Internet of Things control method, which is based on the system in the above embodiments for regulation and control, as shown in Figure 4 , including the following steps: when the water temperature in the circulation area is reduced to the first preset temperature, the first control pipeline 110 is controlled to guide the water in the circulation area into the storage area, and then when the water level in the circulation area is reduced to the first preset water level, the second control pipeline 120 is controlled to guide the water from the buffer area to the circulation area to the water level in the circulation area at the second water level; after the second control pipeline completes the water guiding, the power of the refrigerant circulation module 200 is determined based on the water level and the water temperature in the circulation area.

[0029] During operation, the control module continuously acquires water level and water temperature data in the circulation zone through the first detection unit 710, and acquires water temperature data in the buffer zone as an auxiliary judgment basis; when it is detected that the water temperature in the buffer zone is lower than the second preset temperature, the refrigerant circulation module 200 is immediately triggered to stop the protection mechanism, and through the cooperative action of the first control pipeline 110 and the second control pipeline 120, the low-temperature return water in the buffer zone is directly introduced into the storage zone, avoiding the operation of the refrigerant circulation module 200 under low load state; when the water temperature in the buffer zone is in the interval of the second preset temperature and the third preset temperature, the control module starts the constant power control mode, dynamically calculates the optimal water guide quantity of the second control pipeline 120 according to the difference between the real-time monitored water temperature in the buffer zone and the first preset temperature, and ensures that the return water quantity introduced into the circulation zone each time can meet the refrigeration demand and will not cause too large water temperature fluctuation; when the water temperature in the buffer zone exceeds the third preset temperature, the control module enters the high-temperature emergency control mode, keeps the second control pipeline 120 at the maximum safe flow to introduce return water, and simultaneously accurately adjusts the output power of the refrigerant circulation module according to the real-time water temperature difference, forming a closed-loop control system; in all the above operation modes, the control module uploads the device operation parameters to the cloud management platform in real time through the Internet of Things module, synchronously receives the environmental temperature prediction data and the working load prediction data of the cooling object 300, and adjusts the system operation strategy in advance; in particular, when the acquisition module detects that the cooling object 300 enters a high-load operation state, the control module immediately increases the power of the distribution pump 600 to a preset value, ensures that the cooling water supply quantity matches the refrigeration demand, and simultaneously starts the power standby mode of the refrigerant circulation module 200, reserving 20% of the power adjustment margin to cope with sudden load changes. Through multi-parameter cooperative control and dynamic strategy adjustment, the whole control method realizes the balance between refrigeration efficiency and equipment protection, ensures the continuous and stable operation of the cooling object, reduces the frequency of frequency conversion adjustment of the refrigerant circulation module 200, reduces the risk of equipment shutdown and damage, prolongs the service life of the refrigerant circulation module 200, and improves the working stability and safety of the system.

[0030] It should be noted that in this document, the terms "comprise", "comprising", or any other variant thereof are intended to cover non-exclusive inclusions, so that a process, method, article, or device that includes a series of elements not only includes those elements, but also includes other elements not explicitly listed, or inherent to such a process, method, article, or device. Without more limitations, the element defined by the statement "comprises a" does not exclude the presence of another identical element in the process, method, article, or device that includes the element.

[0031] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. An IoT control system for an industrial refrigeration unit, characterized in that, include: A water tank, comprising a buffer zone, a circulation zone, and a storage zone, wherein the circulation zone is connected to the storage zone via a first control pipeline, and the buffer zone is connected to the circulation zone via a second control pipeline. A first detection unit is provided on the water tank, which is used to detect the water level and water temperature in the circulation zone. A refrigerant circulation module is connected to the circulation zone and is used to reduce the water temperature in the circulation zone to a first preset temperature. A delivery pump is provided, and the storage area is connected to the object being cooled via the delivery pump. The delivery pump is used to deliver cooling water from the storage area to the object being cooled for cooling treatment. A cooling tower, wherein the object being cooled is connected to a buffer zone via the cooling tower, and the cooling tower is used to cool the water passing through it; The control module is connected to the first control pipeline, the second control pipeline, the first detection unit, and the refrigerant circulation module. The control module is configured to: when the water temperature in the circulation zone drops to a first preset temperature, control the first control pipeline to introduce water from the circulation zone into the storage zone; and when the water level in the circulation zone drops to a first preset level, control the second control pipeline to introduce water from the buffer zone into the circulation zone until the water level in the circulation zone reaches a second level. The control module is also configured to: after the second control pipeline completes the water introduction, determine the power of the refrigerant circulation module based on the water level and temperature in the circulation zone.

2. The industrial refrigeration unit IoT control system according to claim 1, characterized in that, The first detection unit is also used to detect the water temperature in the buffer zone, and the control module is further configured to determine the second water level height based on the water temperature in the buffer zone.

3. The industrial refrigeration unit IoT control system according to claim 2, characterized in that, The control module is also configured to: when the water temperature in the buffer zone is below the second preset temperature, control the refrigerant circulation module to stop working, and the first control pipeline and the second control pipeline cooperate to directly introduce the water in the buffer zone into the storage zone, wherein the second preset temperature is higher than the first preset temperature.

4. The industrial refrigeration unit IoT control system according to claim 3, characterized in that, The control module is also configured to: control the refrigerant circulation module to operate at a constant power when the water temperature in the buffer zone is between the second preset temperature and the third preset temperature, and determine the amount of water introduced from the buffer zone to the circulation zone through the second control pipeline based on the temperature difference between the water temperature in the buffer zone and the first preset temperature. The third preset temperature is higher than the second preset temperature.

5. The industrial refrigeration unit IoT control system according to claim 4, characterized in that, The control module is also configured to: when the water temperature in the buffer zone is above the third preset temperature, control the second control pipeline to keep the water flow from the buffer zone to the circulation zone constant, and determine the power of the refrigerant circulation module based on the temperature difference between the water temperature in the buffer zone and the first preset temperature.

6. An industrial refrigeration unit IoT control system according to any one of claims 1 to 5, characterized in that, The cooling object is connected to the buffer zone via an output pipe. The cooling tower is connected in parallel with the output pipe. The system also includes a second detection unit, which is used to detect the output water temperature of the cooling object and the outdoor ambient temperature. The second detection unit is connected to a control module. The control module is further configured to determine whether the cooling tower or the output pipe is used as a channel for introducing water from the cooling object into the buffer zone based on the temperature difference between the output water temperature of the cooling object and the outdoor ambient temperature.

7. The industrial refrigeration unit IoT control system according to claim 6, characterized in that, The buffer area, the loop area, and the storage area are arranged sequentially from top to bottom along the direction of gravity; And / or, the first control line includes a first pipe and a first control valve disposed on the first pipe, the first control valve being connected to the control module; And / or, the second control line includes a second pipe and a second control valve disposed on the second pipe, the second control valve being connected to the control module.

8. An industrial refrigeration unit IoT control system according to any one of claims 1 to 5, characterized in that, The system also includes an acquisition module, which is used to acquire the working status of the object being cooled. The acquisition module and the delivery pump are respectively connected to the control module. The control module is also configured to determine the power of the delivery pump based on the working status of the object being cooled, so as to adjust the amount of water delivered to the object being cooled.

9. An industrial refrigeration unit IoT control system according to any one of claims 1 to 5, characterized in that, The refrigerant circulation module includes a compressor, a condenser, an expansion valve, and an evaporator connected in a ring-shaped loop in sequence. The circulation zone is connected to the evaporator for heat exchange via a circulation pipe.

10. An IoT control method for an industrial refrigeration unit, characterized in that, The system based on any one of claims 1 to 9 is regulated by the following steps: when the water temperature in the circulation zone drops to a first preset temperature, the first control pipeline is controlled to introduce water from the circulation zone into the storage zone; then, when the water level in the circulation zone drops to a first preset water level, the second control pipeline is controlled to introduce water from the buffer zone into the circulation zone until the water level in the circulation zone is at a second water level; after the second control pipeline completes the introduction of water, the power of the refrigerant circulation module is determined based on the water level and water temperature in the circulation zone.

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