On-line monitoring and automatic adjusting device for secondary refrigerant and refrigerating system

Abstract

The utility model provides a secondary refrigerant online monitoring and automatic adjusting device and a refrigerating system. The secondary refrigerant online monitoring and automatic adjusting device comprises a control system, an anti-freezing solution container and a freezing point detector arranged on a secondary refrigerant circulating pipeline. The anti-freezing solution container is connected to the secondary refrigerant circulating pipeline through a first pipeline, and a first pump assembly is arranged on the first pipeline; the secondary refrigerant circulating pipeline is connected with a discharge branch, and a discharge valve is arranged on the discharge branch; the first input end of the control system is connected with the output end of the freezing point detector, the first output end of the control system is connected with the electric control end of the discharge valve, and the control system is connected with the first pump assembly. The freezing point information of the secondary refrigerant is directly detected more accurately, when the anti-freezing solution needs to be supplemented, a part of old secondary refrigerant is discharged through the discharge valve, then the anti-freezing solution is supplemented, concentration recovery of the anti-freezing solution is accelerated, the problem of ice blockage can be effectively solved, full-automatic control is achieved, and the stability and durability of a refrigerating system are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial refrigeration, in particular to a device for on-line monitoring and automatic regulation of a secondary refrigerant and a refrigeration system. Background Art

[0002] In a refrigeration system in a sub-zero low-temperature environment, due to the property that the secondary refrigerant can remain liquid below 0°C, it is usually used to exchange heat with the object to be cooled to lower its temperature. The secondary refrigerant is a mixed liquid of water and antifreeze. The antifreeze includes chemical substances such as ethylene glycol and propylene glycol and has volatility. In actual operation, due to the volatile property of the antifreeze, as the operation time increases, the evaporation of the antifreeze causes the concentration of the antifreeze in the secondary refrigerant to become lower and lower, and then the freezing point temperature of the secondary refrigerant gradually increases, and even the secondary refrigerant freezes, leading to the ice blockage phenomenon. In addition, due to the oxidation of the secondary refrigerant, its pH value also becomes lower and lower during operation, causing corrosion and damage to the copper tubes of the evaporator and the pipelines for transporting the secondary refrigerant in the refrigeration system, resulting in long-term shutdown for maintenance and high costs.

[0003] Chinese Patent with the publication number CN206410384U discloses an on-line detection system for the concentration of the secondary refrigerant in a low-temperature unit. Although it is provided with an on-line concentration detection module on the pipeline between the inlet of the secondary refrigerant and the secondary refrigerant water tank, and the detection of the concentration of the secondary refrigerant is flexible, and a secondary refrigerant compensation valve is also provided, it does not directly detect the freezing point of the secondary refrigerant, but indirectly estimates the freezing point of the secondary refrigerant through the concentration of the secondary refrigerant, resulting in errors. In addition, when replenishing liquid is required, the technical solution of this patent is to directly supplement the antifreeze into the pipeline of the secondary refrigerant. Since the old secondary refrigerant in the pipeline of the secondary refrigerant is not discharged, it will cause an increase in the pressure in the pipeline of the secondary refrigerant and take a long time to make the concentration of the antifreeze reach the standard. Summary of the Utility Model

[0004] The utility model aims to solve the technical problems existing in the prior art, and provides a device for on-line monitoring and automatic regulation of a secondary refrigerant and a refrigeration system, which can more accurately obtain the freezing point information of the secondary refrigerant, can also accelerate the recovery of the concentration of the antifreeze in the circulation pipeline of the secondary refrigerant, shorten the liquid addition time, effectively avoid the ice blockage phenomenon caused by the evaporation of the antifreeze, realize full-automatic control, and improve the stability and durability of the refrigeration system.

[0005] To achieve the above object of the present utility model, according to the first aspect of the present utility model, there is provided a device for on-line monitoring and automatic adjustment of a secondary refrigerant, including a control system, an antifreeze container, and a freezing point detector provided on a secondary refrigerant circulation pipeline; the antifreeze container is connected to the secondary refrigerant circulation pipeline through a first pipeline, and a first pump assembly is provided on the first pipeline; the secondary refrigerant circulation pipeline is connected with a discharge branch, and a discharge valve is provided on the discharge branch; a first input end of the control system is connected to an output end of the freezing point detector, a first output end of the control system is connected to an electric control end of the discharge valve, and the control system is connected to the first pump assembly.

[0006] The above technical solution: In this application, a freezing point detector is provided on the secondary refrigerant circulation pipeline, which can directly and real-time detect the freezing point of the secondary refrigerant in the secondary refrigerant circulation pipeline, and more accurately obtain the freezing point information of the secondary refrigerant; a discharge valve controlled by the control system to open and close is provided on the secondary refrigerant circulation pipeline, which is used to discharge a part of the old secondary refrigerant from the secondary refrigerant circulation pipeline and then supplement the antifreeze when the freezing point of the secondary refrigerant does not meet the requirements. This can accelerate the recovery of the antifreeze concentration in the secondary refrigerant circulation pipeline, shorten the liquid addition time, effectively avoid the ice blockage phenomenon caused by the volatilization of the antifreeze, realize full-automatic control, and improve the stability and durability of the refrigeration system.

[0007] In a preferred embodiment, the first pump assembly includes a first electric control valve and a first metering pump connected in series on the first pipeline, an electric control end of the first electric control valve is connected to a second output end of the control system, and an electric control end of the first metering pump is connected to a third output end of the control system.

[0008] The above technical solution: Using a metering pump to transport the antifreeze can accurately control the amount of input antifreeze.

[0009] In a preferred embodiment, it further includes a first liquid level sensor for detecting the liquid level in the antifreeze container, and an output end of the first liquid level sensor is connected to a second input end of the control system.

[0010] The above technical solution: It is convenient to automatically monitor the storage amount of the antifreeze through the first liquid level sensor.

[0011] In a preferred embodiment, it further includes a PH detector provided on the secondary refrigerant circulation pipeline, and an output end of the PH detector is connected to a third input end of the control system.

[0012] The above technical solution: Realize the automatic monitoring of the PH value of the secondary refrigerant in the secondary refrigerant circulation pipeline.

[0013] In a preferred embodiment, it further includes a pH adjustment liquid container, the pH adjustment liquid container is connected to the coolant circulation pipeline through a second pipeline, a second pump assembly is provided on the second pipeline, and the second pump assembly is connected to the control system.

[0014] The above technical solution: When the pH value of the coolant in the coolant circulation pipeline decreases due to the oxidation of the coolant, the pH value of the coolant is adjusted by supplementing the pH adjustment liquid into the coolant circulation pipeline, automatically adjusting the pH value of the coolant, reducing the corrosion effect on the refrigeration system equipment, reducing the failure rate of the refrigeration system, and improving the stability and durability of the refrigeration system.

[0015] In a preferred embodiment, the second pump assembly includes a second electromagnetic control valve and a second metering pump connected in series on the second pipeline. The electromagnetic control end of the second electromagnetic control valve is connected to the fourth output end of the control system, and the electromagnetic control end of the second metering pump is connected to the fifth output end of the control system.

[0016] The above technical solution: The second metering pump and the second electromagnetic control valve cooperate to accurately control the input amount of the pH adjustment liquid.

[0017] In a preferred embodiment, it further includes a second liquid level sensor for detecting the liquid level in the pH adjustment liquid container. The output end of the second liquid level sensor is connected to the fourth input end of the control system.

[0018] The above technical solution: It is convenient to automatically monitor the storage amount of the pH adjustment liquid through the second liquid level sensor.

[0019] In a preferred embodiment, it further includes a data upload interface for connecting to the enterprise industrial server. The data end of the control system is connected to the data upload interface.

[0020] The above technical solution: It is convenient to push the detection information to the relevant staff.

[0021] In a preferred embodiment, the coolant circulation pipeline includes an input cold storage section and an output cold storage section, and the discharge branch is connected to the output cold storage section.

[0022] The above technical solution, the input cold storage section is used to input low-temperature coolant into the cold storage to cool the cold storage, and the output cold storage section is used to transport the coolant after cooling the cold storage. Connecting the discharge branch to the output cold storage section makes the discharged coolant have a greater degree of volatilization and a higher temperature after exchanging heat with the cold storage, which can assist in improving the antifreeze liquid filling efficiency and reducing the energy consumption of the refrigeration compressor assembly.

[0023] In a preferred embodiment, the discharge branch and the first pipeline are sequentially connected to the output cold storage section in the direction away from the cold storage.

[0024] In the above technical solution, after discharging the old secondary coolant through the discharge branch, antifreeze is added, which avoids the discharged antifreeze and facilitates the antifreeze added to enter the input cold storage section after being mixed and cooled by the refrigeration compression host assembly at the end of the output cold storage section, improving the cooling effect and being more energy-efficient.

[0025] In a preferred embodiment, a discharge branch, a first pipeline, and a second pipeline are connected to the output cold storage section, and the connection point of the discharge branch and the output cold storage section is closer to the cold storage than the connection points of the first pipeline and the second pipeline and the output cold storage section.

[0026] The above technical solution: After discharging the old secondary coolant through the discharge branch, antifreeze and PH adjustment liquid are added, which avoids the discharged antifreeze and PH adjustment liquid and facilitates the antifreeze and PH adjustment liquid added to enter the input cold storage section after being mixed and cooled by the refrigeration compression host assembly at the end of the output cold storage section, improving the cooling effect and being more energy-efficient.

[0027] To achieve the above object of the present invention, according to the second aspect of the present invention, the present invention provides a refrigeration system, including a refrigeration compression host assembly, a cooling water tower, and a secondary coolant circulation pipeline, and further including the secondary coolant on-line monitoring and automatic adjustment device described in the first aspect of the present invention; the refrigeration compression host assembly includes a compressor, a condenser, and an evaporator, the cooling water tower cools the condenser through a cooling water pipe, and the evaporator is used to cool the secondary coolant in the secondary coolant circulation pipeline.

[0028] The above technical solution: Realizes the full-automatic control of the secondary coolant, can effectively avoid the ice blockage phenomenon of the refrigeration system caused by the volatilization of the antifreeze and the corrosion phenomenon of the refrigeration system caused by the reduction of the PH value due to the oxidation of the secondary coolant, greatly reduces the failure rate of the refrigeration system, and effectively improves the stability and durability of the refrigeration system. Description of the Drawings

[0029] Figure 1 is the control block diagram of the secondary coolant on-line monitoring and automatic adjustment device in a preferred embodiment of the present invention;

[0030] Figure 2 is the connection schematic diagram of the refrigeration system in a preferred embodiment of the present invention. Detailed Description of the Embodiment

[0031] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as limiting the present invention.

[0032] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and 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 should not be understood as a limitation on the present invention.

[0033] In the description of the present utility model, unless otherwise specified and limited, it should be noted that the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the internal connection of two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0034] The utility model discloses a device for online monitoring and automatic adjustment of a cooling medium. In a preferred embodiment, Figure 1 and Figure 2 As shown, the device includes a control system, an antifreeze container, and a freezing point detector arranged on a coolant circulation pipeline; the antifreeze container is connected to the coolant circulation pipeline through a first pipeline, and a first pump assembly is arranged on the first pipeline; the coolant circulation pipeline is connected to a discharge branch, and a discharge valve is arranged on the discharge branch; the first input end of the control system is connected to the output end of the freezing point detector, the first output end of the control system is connected to the electrical control end of the discharge valve, and the control system is connected to the first pump assembly.

[0035] In this embodiment, Figure 2 The connecting dotted lines are wires, and the connecting solid lines are pipes. The control system can be a microprocessor such as a PLC or a 51 single-chip microcomputer and its peripheral circuits. The shape of the antifreeze container is preferably, but not limited to, a tank or a box. In the cold storage refrigeration system, the refrigerant circulation pipeline passes through the cold storage, and the cold storage is cooled by heat exchange between the cold storage and the refrigerant. The freezing point detector is preferably, but not limited to, the existing Fuland Instrument model FDY-0471 coolant freezing point tester, and the control system reads the freezing point test information through the serial port. Discharge valve ( Figure 2 D1) can be an electric valve, and the control system is connected to the electric control end of the discharge valve through an I / O pin. The first pump component can be a variable pump or a fixed pump, and the control system is connected to the electric control end of the first pump component through an I / O pin. The freezing point detector can be set at the input cold storage segment of the refrigerant circulation pipeline.

[0036] In this embodiment, preferably, Figure 2As shown in the figure, the first pump assembly includes a first electrically controlled valve D2 and a first metering pump E1 connected in series on the first pipeline. The electrically controlled end of the first electrically controlled valve D2 is connected to the second output end of the control system, and the electrically controlled end of the first metering pump E1 is connected to the third output end of the control system. The second output end and the third output end of the control system can both be I / O pins. When antifreeze needs to be replenished, the control system opens the first electrically controlled valve D2 and then controls the first metering pump E1 to start, precisely controlling the amount of antifreeze replenished.

[0037] In this embodiment, the working principle of the device is as follows: Under normal conditions, the discharge valve D1, the first electrically controlled valve D2, and the first metering pump E1 are in the closed state. The freezing point detector continuously detects the freezing point of the coolant in the coolant circulation pipeline. When the detected freezing point is higher than the set freezing point threshold, the freezing point information is archived and uploaded to the enterprise industrial server through the data upload interface. Then, the discharge valve D1 is opened, and a certain amount of old antifreeze is discharged. After that, the discharge valve D1 is closed, the first electrically controlled valve D2 is opened, and then the first metering pump E1 is started. The first pipeline is connected to the coolant circulation pipeline, and the antifreeze container discharges a certain amount of antifreeze into the coolant circulation pipeline through the first pipeline. After a preset time interval, the freezing point is detected again. If the freezing point is not higher than the freezing point threshold, the adjustment ends. If the freezing point is still higher than the freezing point threshold, the above control process of D1-D2-E1 is repeated until the preset number of repetitions is reached, and then it is reported to the enterprise industrial server for alarm, and manual intervention is carried out. It should be noted that the methods involved in the above content are not within the protection scope of the present utility model.

[0038] In a preferred embodiment, it further includes a first liquid level sensor for detecting the liquid level in the antifreeze container. The output end of the first liquid level sensor is connected to the second input end of the control system. The first liquid level sensor is preferably but not limited to a silicon pressure gauge sensor, an ultrasonic liquid level sensor, or a float-type liquid level sensor. The output end of the first liquid level sensor can be connected to the A / D analog-to-digital sampling pin of the control system. The first liquid level sensor is used for the daily management of the antifreeze liquid level in the antifreeze container. When the stock quantity is lower than the set quantity, it gives an early warning and pushes information to the enterprise industrial server, requesting manual intervention.

[0039] In a preferred embodiment, it further includes a PH detector provided on the coolant circulation pipeline. The output end of the PH detector is connected to the third input end of the control system. The PH detector is preferably but not limited to selecting existing PH testers of the VSTAR10 series of Thermo Fisher Scientific or the PH848 pH tester of Sima. The electrical signal output by it can be input through the A / D analog-to-digital sampling pin of the control system.

[0040] In this embodiment, further preferably, it further includes a pH adjustment liquid container. The pH adjustment liquid container is connected to the coolant circulation pipeline through a second pipeline. A second pump assembly is provided on the second pipeline, and the second pump assembly is connected to the control system. The pH adjustment liquid is preferably but not limited to sodium hydroxide solution, potassium hydroxide solution, sodium carbonate solution, and sodium bicarbonate solution. The second pump assembly can be a variable pump or a metering pump, and the control system is connected to the electronic control end of the second pump assembly through I / O pins. The shape of the pH adjustment liquid container is preferably but not limited to a tank body or a box body.

[0041] In this embodiment, further preferably, for the precise control of the pH adjustment liquid, as Figure 2 shown, the second pump assembly includes a second electronic control valve D3 and a second metering pump E2 connected in series on the second pipeline. The electronic control end of the second electronic control valve D3 is connected to the fourth output end of the control system, and the electronic control end of the second metering pump E2 is connected to the fifth output end of the control system. The control system is connected to the electronic control ends of the second electronic control valve D3 and the second metering pump E2 through two I / O pins respectively.

[0042] In this embodiment, the process of the device for the pH adjustment part is as follows: Under normal conditions, the discharge valve D1, the second electronic control valve D3, and the second metering pump E2 are in the closed state. The pH detector continuously detects the pH value of the coolant in the coolant circulation pipeline. When the detected pH value is lower than the set pH threshold, the pH information is archived and uploaded to the enterprise industrial server through the data upload interface. After that, the discharge valve D1 is opened, a certain amount of old antifreeze is discharged, and then the discharge valve D1 is closed. The second electronic control valve D3 is opened, and then the second metering pump E2 is started. The second pipeline is connected to the coolant circulation pipeline, and the pH adjustment liquid container discharges a certain amount of pH adjustment liquid to the coolant circulation pipeline through the second pipeline. After an interval of a preset time period, the pH value is detected again. If the pH value is higher than the pH threshold, the adjustment ends. If the pH value is still not higher than the pH threshold, the above control process of D1 - D3 - E2 is repeated until the preset number of repetitions is reached, and then it is reported to the enterprise industrial server for alarm, and manual intervention is carried out for processing. It should be noted that the method described above is not within the protection scope of the present utility model.

[0043] In this embodiment, when both the freezing point and the pH value of the coolant deviate from the set values during detection, the freezing point (antifreeze concentration) adjustment is preferentially performed. After the freezing point meets the standard, the pH value is detected again. If it is normal, it returns to the normal state. If it still deviates, the above pH automatic adjustment program is executed.

[0044] In a preferred embodiment, it further includes a second liquid level sensor for detecting the liquid level in the PH adjustment liquid container, and the output end of the second liquid level sensor is connected to the fourth input end of the control system. The second liquid level sensor is preferably but not limited to a silicon pressure gauge sensor, an ultrasonic liquid level sensor, or a float-type liquid level sensor, and the output end of the second liquid level sensor can be connected to the A / D analog-to-digital sampling pin of the control system. The second liquid level sensor is used for the daily management of the PH adjustment liquid level in the PH adjustment liquid container. When the stock quantity is lower than the set quantity, it gives an alarm and pushes information to the enterprise industrial server to request manual intervention.

[0045] In a preferred embodiment, it further includes a data upload interface for connecting to the enterprise industrial server, and the data end of the control system is connected to the data upload interface. The data upload interface is preferably but not limited to a wired communication interface (such as RS232 / RS485 / UART) or a wireless communication interface (such as a WIFI communication module, a 4G communication module)

[0046] In a preferred embodiment, the secondary refrigerant circulation pipeline includes an input cold storage section and an output cold storage section, and the discharge branch is connected to the output cold storage section.

[0047] The secondary refrigerant circulation pipeline includes an input cold storage section, a cold storage heat exchange section, an output cold storage section, and a compression heat exchange section connected in sequence. Among them, the input cold storage section transports the secondary refrigerant to the cold storage heat exchange section, and the cold storage heat exchange section exchanges heat with the cold storage to cool the cold storage. The secondary refrigerant after heat exchange and temperature rise is transported to the compression heat exchange section through the output cold storage section. The compression heat exchange section passes through the evaporator in the refrigeration compression host assembly, and heat exchange occurs in the evaporator to achieve cooling. The cooled secondary refrigerant is sent back to the input cold storage section again, and so on, to achieve cold storage cooling. Therefore, in this embodiment, connecting the discharge branch to the output cold storage section can improve the secondary refrigerant regulation efficiency and avoid wasting the energy consumption of the refrigeration compression host assembly.

[0048] In a preferred embodiment, a discharge branch and a first pipeline are sequentially connected to the output cold storage section in the direction away from the cold storage. By placing the discharge branch before the first pipeline, when the discharge branch and the first pipeline are used simultaneously, the newly added antifreeze will not be discharged. The newly added antifreeze will first enter the refrigeration compression host assembly for mixed cooling treatment and then be transported to the cold storage, improving the refrigeration efficiency of the refrigeration system.

[0049] In a preferred embodiment, as Figure 2 shown, a discharge branch, a first pipeline, and a second pipeline are connected to the output cold storage section, and the connection point of the discharge branch and the output cold storage section is closer to the cold storage than the connection points of the first pipeline and the second pipeline with the output cold storage section. The connection sequence between the first pipeline and the second pipeline is not limited.

[0050] The present utility model also discloses a refrigeration system. In a preferred embodiment, as Figure 2 shown, the refrigeration system includes a refrigeration compression main unit assembly, a cooling water tower, a secondary refrigerant circulation pipeline, and the above-mentioned secondary refrigerant on-line monitoring and automatic adjustment device; the refrigeration compression main unit assembly includes a compressor, a condenser, and an evaporator. The cooling water tower cools the condenser through a cooling water pipe, and the evaporator is used to cool the secondary refrigerant in the secondary refrigerant circulation pipeline.

[0051] In this embodiment, preferably, as Figure 2 shown, a cooling water pump is provided on the cooling water pipe to provide the conveying power. A freezing water pump is also provided at the end of the output cold storage section to provide the circulating power of the secondary refrigerant in the secondary refrigerant circulation pipeline.

[0052] In this embodiment, preferably, to improve the stability and safety of the refrigeration system, the secondary refrigerant circulation pipeline further includes a balance bypass branch with two ends respectively connected to the input cooling section and the output cooling section.

[0053] In this embodiment, preferably, to improve safety, a pressure regulating branch is also connected to the output cold storage section. An expansion water tank is provided on the pressure regulating branch, and a makeup water branch is further connected to the inlet of the expansion water tank. A makeup water valve is provided on the makeup water branch. Further preferably, to achieve automation, the makeup water valve is an electric valve, and the control system controls the opening or closing of the makeup water valve.

[0054] In the description of this specification, the descriptions referring to terms such as "an embodiment", "some embodiments", "example", "specific example", "a kind of implementation manner", "a preferred implementation manner" or "some examples", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0055] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and purposes of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A device for online monitoring and automatic adjustment of refrigerant, characterized in that: It includes a control system, an antifreeze container, and a freezing point detector arranged on a coolant circulation pipeline; The antifreeze liquid container is connected to the coolant circulation pipeline through a first pipeline, and a first pump assembly is provided on the first pipeline; The refrigerant circulation pipeline is connected to a discharge branch, and a discharge valve is provided on the discharge branch; The first input end of the control system is connected to the output end of the freezing point detector, the first output end of the control system is connected to the electrical control end of the discharge valve, and the control system is connected to the first pump assembly.

2. The device for online monitoring and automatic adjustment of coolant according to claim 1, characterized in that: The first pump assembly includes a first electrically controlled valve and a first metering pump connected in series on a first pipeline, the electrically controlled end of the first electrically controlled valve is connected to the second output end of the control system, and the electrically controlled end of the first metering pump is connected to the third output end of the control system.

3. The device for online monitoring and automatic adjustment of brine according to claim 1, characterized in that: It also includes a first liquid level sensor for detecting the liquid level in the antifreeze liquid container, and the output end of the first liquid level sensor is connected to the second input end of the control system.

4. The device for online monitoring and automatic adjustment of brine according to any one of claims 1 to 3, characterized in that: It also includes a pH detector arranged on the coolant circulation pipeline, and the output end of the pH detector is connected to the third input end of the control system.

5. The device for online monitoring and automatic adjustment of brine according to claim 4, characterized in that: It also includes a pH regulating liquid container, which is connected to the coolant circulation pipeline through a second pipeline. A second pump component is arranged on the second pipeline, and the second pump component is connected to the control system.

6. The device for online monitoring and automatic adjustment of brine according to claim 5, characterized in that: The second pump assembly includes a second electrically controlled valve and a second metering pump connected in series on the second pipeline, the electrically controlled end of the second electrically controlled valve is connected to the fourth output end of the control system, and the electrically controlled end of the second metering pump is connected to the fifth output end of the control system; and / or, It also includes a second liquid level sensor for detecting the liquid level in the pH regulating liquid container, wherein the output end of the second liquid level sensor is connected to the fourth input end of the control system; and / or, It also includes a data upload interface for connecting to an enterprise industrial server, and the data end of the control system is connected to the data upload interface.

7. The device for online monitoring and automatic adjustment of brine according to claim 1, 2, 3, 5 or 6, characterized in that: The refrigerant circulation pipeline includes an input cold storage section and an output cold storage section, and the discharge branch is connected to the output cold storage section.

8. The device for online monitoring and automatic adjustment of brine according to claim 7, characterized in that: The output cold storage segment is sequentially connected with a discharge branch and a first pipeline in a direction away from the cold storage.

9. The device for online monitoring and automatic adjustment of brine according to claim 7, characterized in that: The output cold storage segment is connected with a discharge branch, a first pipeline and a second pipeline, and a connection between the discharge branch and the output cold storage segment is closer to the cold storage than a connection between the first pipeline and the second pipeline and the output cold storage segment.

10. A refrigeration system, characterized in that: It comprises a refrigeration compression main unit assembly, a cooling water tower and a refrigerant circulation pipeline, and also comprises a refrigerant online monitoring and automatic adjustment device as claimed in any one of claims 1 to 9; The refrigeration compression main unit assembly includes a compressor, a condenser and an evaporator. The cooling water tower cools the condenser through a cooling water pipe, and the evaporator is used to cool the refrigerant in the refrigerant circulation pipeline.

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