Medium mixing supply system

Abstract

The utility model relates to the technical field of semiconductor manufacturing, and provides a medium mixed supply system, which comprises a low-temperature circulation loop, a medium-temperature circulation loop and a first bypass pipeline, the low-temperature circulation loop comprises a low-temperature refrigerating unit, a low-temperature water inlet pipeline and a low-temperature water outlet pipeline; the medium-temperature circulation loop comprises a medium-temperature refrigerating unit, a medium-temperature water inlet pipeline and a medium-temperature water outlet pipeline; and the first bypass pipeline is connected between the low-temperature water outlet pipeline and the medium-temperature water outlet pipeline. According to the system, a low-temperature medium circulation loop and a high-temperature medium circulation loop are connected to form a whole mixing system, and load is increased and energy consumption is reduced through linkage of the two circulation loops.

Description

Technical Field

[0001] The utility model relates to the technical field of semiconductor manufacturing, in particular to a medium mixing supply system. Background Art

[0002] Refrigeration is an indispensable basic function in semiconductor factories. Different scenarios require different refrigeration temperatures. For example, for application scenarios such as process cooling water systems (PCW), clean room dry cooling coils (DCC), and clean room fresh air handling units (MAU), medium-temperature media (medium at approximately 10°C to 20°C) are usually required for refrigeration; application scenarios such as office area air conditioning units (FCU) and clean room fresh air handling units (MAU) usually require low-temperature media (medium below 10°C) for refrigeration.

[0003] Therefore, existing semiconductor factories typically require both low-temperature and medium-temperature media systems. These systems are independent and operate independently of each other. Both systems have a rated operating range. When operating within this range, the system achieves high efficiency. When operating outside this range, the system experiences low efficiency.

[0004] During actual operation, these media systems often experience operating conditions outside their rated operating range due to low loads. Existing solutions typically involve temporary shutdown to save energy. For example, low-temperature media systems often start and stop frequently due to low loads, potentially dozens of times per day (compared to an average of one to two starts and stops per day). This impacts the system's lifespan and results in high energy consumption.

[0005] Statistics show that during the period from November to April of the following year, the low-temperature system's load dropped to 22% of the average load, with frequent starts and stops. The medium-temperature system's load dropped to 40% of the average load. Both the low-temperature and medium-temperature systems operated outside their rated operating ranges, resulting in high energy consumption.

[0006] To this end, the utility model provides a medium mixing supply system, which connects a low-temperature medium circulation loop and a high-temperature medium circulation loop to form a whole mixing system, and increases the load and reduces energy consumption through the linkage of the two circulation loops. Utility Model Content

[0007] The purpose of the utility model is to provide a medium mixing supply system, which connects a low-temperature medium circulation loop and a high-temperature medium circulation loop to form a whole mixing system, increases the load and reduces energy consumption through the linkage of the two circulation loops.

[0008] The utility model provides a medium mixing supply system, comprising: a low-temperature circulation loop, a medium-temperature circulation loop and a first bypass pipeline;

[0009] The low-temperature circulation loop includes a low-temperature refrigeration unit, a low-temperature water inlet pipeline and a low-temperature water outlet pipeline, wherein the low-temperature water inlet pipeline is connected to the liquid inlet of the low-temperature refrigeration unit, and the low-temperature water outlet pipeline is connected to the liquid outlet of the low-temperature refrigeration unit;

[0010] The medium-temperature circulation loop includes a medium-temperature refrigeration unit, a medium-temperature water inlet pipeline and a medium-temperature water outlet pipeline, wherein the medium-temperature water inlet pipeline is connected to the liquid inlet of the medium-temperature refrigeration unit, and the medium-temperature water outlet pipeline is connected to the liquid outlet of the medium-temperature refrigeration unit;

[0011] The first bypass pipeline is connected between the low-temperature water outlet pipeline and the medium-temperature water outlet pipeline.

[0012] Optionally, the medium mixing supply system further includes a second bypass pipeline;

[0013] The second bypass pipeline is connected between the low-temperature water inlet pipeline and the medium-temperature water inlet pipeline.

[0014] Optionally, the medium mixing supply system further includes a first flow regulating valve, and the first flow regulating valve is arranged in the first bypass line.

[0015] Optionally, the medium mixing supply system further includes a second flow regulating valve, and the second flow regulating valve is arranged in the second bypass line.

[0016] Optionally, the medium-temperature circulation loop further includes a temperature detection component, which is arranged in the medium-temperature water outlet pipe.

[0017] The connection position between the first bypass pipeline and the medium-temperature water outlet pipeline is located between the liquid outlet of the medium-temperature refrigeration unit and the temperature detection component.

[0018] Optionally, the temperature detection component includes a first temperature detection component, which is arranged on the medium-temperature water outlet pipeline and close to one side of the connection position.

[0019] Optionally, the temperature detection component includes a second temperature detection component, which is arranged on the medium-temperature water outlet pipeline and close to the liquid inlet of the medium-temperature medium equipment.

[0020] Optionally, the low-temperature circulation loop further includes a low-temperature circulation pump, and the low-temperature circulation pump is arranged in the low-temperature water inlet pipeline.

[0021] Optionally, the medium-temperature circulation loop further includes a medium-temperature circulation pump, and the medium-temperature circulation pump is arranged in the medium-temperature water inlet pipeline.

[0022] Optionally, when the low-temperature circulation loop includes a low-temperature circulation pump, the low-temperature circulation pump is located between the connection position of the second bypass pipeline and the low-temperature water inlet pipeline and the liquid inlet of the low-temperature refrigeration unit;

[0023] And / or, when the medium-temperature circulation loop includes a medium-temperature circulation pump, the medium-temperature circulation pump is located between the connection position of the second bypass pipeline and the medium-temperature water inlet pipeline and the liquid inlet of the medium-temperature refrigeration unit.

[0024] With this configuration, the first bypass line allows a portion of the medium at the low-temperature refrigeration unit's outlet to be diverted to the medium-temperature outlet pipe. When the load on the low-temperature and medium-temperature circulation loops is low, the medium-temperature refrigeration unit can be shut down. In this case, the medium-temperature refrigeration unit acts simply as a connecting pipe. A portion of the low-temperature medium cooled by the low-temperature refrigeration unit can be diverted to the medium-temperature outlet pipe via the first bypass line. This diverted low-temperature medium mixes with the high-temperature medium in the medium-temperature outlet pipe to form medium-temperature medium, which is then supplied to the medium-temperature medium equipment. The medium-temperature circulation loop then acts as a load, loading onto the low-temperature circulation loop. This increases the load on the low-temperature circulation loop, facilitating its operation within the rated operating range, ensuring high efficiency and reducing energy consumption. Furthermore, the medium-temperature refrigeration unit is shut down, meaning that the low-temperature and medium-temperature circulation loops achieve cooling through the low-temperature refrigeration unit, further reducing energy consumption. Furthermore, the low-temperature and medium-temperature refrigeration units do not require frequent startup and shutdown, extending their service life.

[0025] The second bypass line allows a portion of the high-temperature medium in the medium-temperature water inlet line to flow back to the low-temperature water inlet line. When the load of the low-temperature circulation loop is low and the load of the medium-temperature circulation loop is normal or high, the low-temperature circulation loop and the medium-temperature circulation loop operate simultaneously. Part of the high-temperature medium passing through the medium-temperature medium device flows into the liquid inlet of the medium-temperature refrigeration unit, and the other part flows back to the low-temperature water inlet line and mixes with the medium in the low-temperature water inlet line, causing the temperature of the medium entering the liquid inlet of the low-temperature refrigeration unit to increase. At this time, a portion of the medium-temperature circulation loop acts as a load and is loaded into the low-temperature circulation loop. On the one hand, it increases the load of the low-temperature circulation loop and appropriately reduces the load of the medium-temperature circulation loop. This is conducive to ensuring that the operating conditions of the low-temperature circulation loop and the medium-temperature circulation loop are both within the rated operating range, thereby ensuring high operating efficiency and reducing energy consumption. On the other hand, the low-temperature refrigeration unit and the medium-temperature refrigeration unit do not need to be frequently started and stopped, thereby increasing the service life of the units. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1This is a structural diagram of a media mixing and supplying system according to an embodiment of the present invention;

[0027] Figure 2 This is a diagram of the operating mechanism of a media mixing supply system according to an embodiment of the present invention;

[0028] Figure 3 This is an operating diagram of a media mixing supply system according to an embodiment of the present invention;

[0029] Figure 4 This is a table showing the operating conditions of the low-temperature circulation loop and the medium-temperature circulation loop in the medium mixing supply system of one embodiment of the present utility model when they are operating independently;

[0030] Figure 5 This is an operating status table of the low-temperature circulation loop and the medium-temperature circulation loop in the medium mixing supply system of one embodiment of the present utility model during water mixing operation;

[0031] Figure 6 This is a comparison diagram of energy consumption savings of a media mixing supply system according to an embodiment of the present invention.

[0032] Among them, in the accompanying drawings:

[0033] 10- low-temperature circulation loop; 11- low-temperature refrigeration unit; 12- low-temperature water inlet pipeline; 13- low-temperature water outlet pipeline; 14- low-temperature circulation pump;

[0034] 20 - medium-temperature circulation loop; 21 - medium-temperature refrigeration unit; 22 - medium-temperature water inlet pipe; 23 - medium-temperature water outlet pipe; 24 - temperature detection component; 241 - first temperature detection element; 242 - second temperature detection element; 25 - medium-temperature circulation pump;

[0035] 30-first bypass line;

[0036] 40-second bypass line;

[0037] 50-first flow regulating valve;

[0038] 60- second flow control valve;

[0039] 70- Low temperature media equipment;

[0040] 80-Medium temperature medium equipment;

[0041] 90-Control unit. DETAILED DESCRIPTION

[0042] The following is a detailed description of the media mixing and supply system proposed by the present invention, with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are highly simplified and not to exact scale, and are intended solely to facilitate and clarify the description of the embodiments of the present invention.

[0043] As used in the present invention, the singular forms "a", "an", and "the" include plural objects, the term "or" is generally used to include the meaning of "and / or", the term "several" is generally used to include the meaning of "at least one", and the terms "at least two" or "a plurality" are generally used to include the meaning of "two or more". In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first", "second", and "third" may explicitly or implicitly include one or at least two of the features. In addition, as used in the present invention, "installed", "connected", "connected", and one element is "set" on another element should be understood in a broad sense, usually only indicating that there is a connection, coupling, cooperation or transmission relationship between the two elements, and the connection, coupling, cooperation or transmission between the two elements can be direct or indirect through an intermediate element, and cannot be understood as indicating or implying the spatial position relationship between the two elements, that is, one element can be in any orientation such as inside, outside, above, below or on one side of another element, unless the content clearly indicates otherwise. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, directional terms such as above, below, up, down, upward, downward, left, right, etc. are used relative to the exemplary embodiments as they are shown in the figures, with the upward or upper direction toward the top of the corresponding figure, and the downward or lower direction toward the bottom of the corresponding figure.

[0044] This embodiment provides a medium mixing supply system for circulating a medium, which can be, for example, water or other existing fluid medium used for refrigeration. In this embodiment, water is used as an example, so the medium mixing supply system is mainly used for supplying water.

[0045] The medium mixing supply system includes: a low-temperature circulation loop 10, a medium-temperature circulation loop 20 and a first bypass pipeline 30;

[0046] Please refer to Figure 1As shown, the low-temperature circulation loop 10 includes a low-temperature refrigeration unit 11, a low-temperature water inlet pipeline 12 and a low-temperature water outlet pipeline 13. The low-temperature water inlet pipeline 12 is connected to the liquid inlet of the low-temperature refrigeration unit 11, and the low-temperature water outlet pipeline 13 is connected to the liquid outlet of the low-temperature refrigeration unit 11;

[0047] The medium-temperature circulation loop 20 includes a medium-temperature refrigeration unit 21, a medium-temperature water inlet pipeline 22 and a medium-temperature water outlet pipeline 23. The medium-temperature water inlet pipeline 22 is connected to the liquid inlet of the medium-temperature refrigeration unit 21, and the medium-temperature water outlet pipeline 23 is connected to the liquid outlet of the medium-temperature refrigeration unit 21.

[0048] Among them, the low-temperature refrigeration unit 11 and the medium-temperature refrigeration unit 21 are both refrigeration equipment, which both use chillers. Chillers are also called freezing units, refrigeration units, ice water units, cooling equipment, chillers, freezers, refrigerators, ice water machines, freezing water machines, cooling machines, etc.

[0049] The chiller consists of four main components: a compressor, an evaporator, a condenser, and an expansion valve, which achieve the cooling and heating effects of the unit. The refrigeration purpose is achieved through a vapor compression refrigeration cycle. The principle is to use the evaporator to exchange heat between water and refrigerant. The refrigerant absorbs the heat load in the water, causing the water to cool down to produce cold water and the refrigerant to heat up. The cold water is used for the medium equipment. After the refrigerant heats up, it is compressed by the compressor and then recooled by the condenser for recycling. The refrigeration principle and structure of the low-temperature refrigeration unit 11 and the medium-temperature refrigeration unit 21 are both existing technologies. Existing equipment can be directly purchased and will not be described here.

[0050] The difference between the low-temperature refrigeration unit 11 and the medium-temperature refrigeration unit 21 lies in their different target temperatures. The water temperature at the outlet of the low-temperature refrigeration unit 11 is lower than that of the medium-temperature refrigeration unit 21. For example, the water temperature at the outlet of the low-temperature refrigeration unit 11 is approximately below 10°C, while the water temperature at the outlet of the medium-temperature refrigeration unit 21 is between 10°C and 20°C.

[0051] Please continue to refer to Figure 1 As shown, the low-temperature water inlet pipe 12 and the low-temperature water outlet pipe 13 are also connected to the low-temperature medium device 70, wherein the low-temperature medium device 70 is, for example, an air conditioning refrigeration unit in an office area and a fresh air handling unit in a clean room. The low-temperature water inlet pipe 12 is connected to the liquid outlet of the low-temperature medium device 70, and the low-temperature water outlet pipe 13 is connected to the liquid inlet of the low-temperature medium device 70. The low-temperature medium after being cooled by the low-temperature refrigeration unit 11 is supplied to the liquid inlet of the low-temperature medium device 70 through the low-temperature water outlet pipe 13, and then flows back to the liquid inlet of the low-temperature refrigeration unit 11 through the liquid outlet of the low-temperature medium device 70 and the low-temperature water inlet pipe 12 to form a circulation.

[0052] Similarly, the medium-temperature water inlet pipe 22 and the medium-temperature water outlet pipe 23 are also connected to the medium-temperature medium equipment 80, wherein the medium-temperature medium equipment 80 is, for example, a process cooling water system, a clean room dry cooling coil, a clean room fresh air treatment unit, etc., wherein the medium-temperature water inlet pipe 22 is connected to the liquid outlet of the medium-temperature medium equipment 80, and the medium-temperature water outlet pipe 23 is connected to the liquid inlet of the medium-temperature medium equipment 80. The medium-temperature medium after being cooled by the medium-temperature refrigeration unit 21 is supplied to the liquid inlet of the medium-temperature medium equipment 80 through the medium-temperature water outlet pipe 23, and then flows back to the liquid inlet of the medium-temperature refrigeration unit 21 through the liquid outlet of the medium-temperature medium equipment 80 and the medium-temperature water inlet pipe 22 to form a circulation.

[0053] Please continue to refer to Figure 1 As shown, the low-temperature circulation loop 10 also includes a low-temperature circulation pump 14, which is arranged in the low-temperature water inlet pipe 12. The low-temperature circulation pump 14 is provided to provide power for the flow of the medium in the entire low-temperature circulation loop 10. Similarly, the medium-temperature circulation loop 20 also includes a medium-temperature circulation pump 25, which is arranged in the medium-temperature water inlet pipe 22. The medium-temperature circulation pump 25 is provided to provide power for the flow of the medium in the entire medium-temperature circulation loop 20. The low-temperature circulation pump 14 and the medium-temperature circulation pump 25 can be gear pumps, centrifugal pumps, screw pumps, etc. The low-temperature circulation pump 14 and the medium-temperature circulation pump 25 can be selected based on the type of their fluid medium and the demand for delivery temperature. The structural principle of the low-temperature circulation pump 14 and the medium-temperature circulation pump 25 is the existing technology and will not be repeated here.

[0054] Please continue to refer to Figure 1 As shown, the first bypass pipeline 30 is connected between the low-temperature water outlet pipeline 13 and the medium-temperature water outlet pipeline 23 .

[0055] The provision of the first bypass line 30 allows a portion of the medium at the outlet of the low-temperature refrigeration unit 11 to be diverted to the medium-temperature water outlet line 23. When the load on the low-temperature circulation loop 10 and the medium-temperature circulation loop 20 is low, the medium-temperature refrigeration unit 21 can be shut down. In this case, the medium-temperature refrigeration unit 21 functions simply as a connecting line. A portion of the low-temperature medium cooled by the low-temperature refrigeration unit 11 can be diverted through the first bypass line 30 to the medium-temperature water outlet line 23. This diverted low-temperature medium mixes with the high-temperature medium in the medium-temperature water outlet line 23 to form medium-temperature medium, which is then supplied to the medium-temperature medium device 80. At this time, the medium-temperature circulation loop 20 acts as a load and is loaded into the low-temperature circulation loop 10. On the one hand, the load of the low-temperature circulation loop 10 is increased, which is conducive to making the operating conditions of the low-temperature circulation loop 10 within the rated operating conditions to ensure higher operating efficiency and thus reduce energy consumption; on the other hand, the medium-temperature refrigeration unit 21 is turned off, that is, the low-temperature circulation loop 10 and the medium-temperature circulation loop 20 realize cooling through the low-temperature refrigeration unit 11, further reducing energy consumption; and the low-temperature refrigeration unit 11 and the medium-temperature refrigeration unit 21 do not need to be frequently started and stopped, thereby increasing the service life of the units.

[0056] Please continue to refer to Figure 1 As shown, in this embodiment, the media mixing and supply system further includes a first flow control valve 50, which is disposed in the first bypass line 30. The first flow control valve 50 can be a solenoid valve, a gate valve, a ball valve, or the like. The specific valve type of the first flow control valve 50 can be adaptively adjusted based on actual usage requirements. The principle, structure, and installation method of the first flow control valve 50 are all conventional and will not be further described here.

[0057] The provision of the first flow control valve 50 facilitates closing or opening the first bypass line 30, selectively connecting the low-temperature outlet water line 13 of the low-temperature circulation loop 10 with the medium-temperature outlet water line 23 of the medium-temperature circulation loop 20 based on actual operating conditions. This allows for flexible adjustment of the media flow path of the entire supply system to adapt to varying load conditions and ensure that the entire system operates within a high-efficiency operating range. Furthermore, the first flow control valve 50 is used to adjust the flow rate of the first bypass line 30, thereby adjusting the low-temperature media diverted to the medium-temperature outlet water line 23, ensuring that an appropriate low-temperature media flow rate is diverted to the medium-temperature outlet water line 23 to meet the media temperature requirements of the medium-temperature media equipment.

[0058] Please continue to refer to Figure 1 As shown, the medium mixing supply system further includes a second bypass pipeline 40 ; the second bypass pipeline 40 is connected between the low-temperature water inlet pipeline 12 and the medium-temperature water inlet pipeline 22 .

[0059] The provision of the second bypass line 40 allows a portion of the high-temperature medium in the medium-temperature water inlet line 22 to flow back to the low-temperature water inlet line 12 . When the load of the low-temperature circulation loop 10 is low and the load of the medium-temperature circulation loop 20 is normal or high, the low-temperature circulation loop 10 and the medium-temperature circulation loop 20 operate simultaneously, wherein a portion of the high-temperature medium passing through the medium-temperature medium device 80 flows into the liquid inlet of the medium-temperature refrigeration unit 21, and the other portion flows back to the low-temperature water inlet pipe 12 and mixes with the medium in the low-temperature water inlet pipe 12, so that the temperature of the medium entering the liquid inlet of the low-temperature refrigeration unit 11 increases. At this time, a portion of the medium in the medium-temperature circulation loop 20 acts as a load and is loaded into the low-temperature circulation loop 10. On the one hand, the load of the low-temperature circulation loop 10 is increased, and the load of the medium-temperature circulation loop 20 is appropriately reduced, which is conducive to making the operating conditions of the low-temperature circulation loop 10 and the medium-temperature circulation loop 20 within the rated operating conditions, so as to ensure higher operating efficiency and thereby reduce energy consumption; on the other hand, the low-temperature refrigeration unit 11 and the medium-temperature refrigeration unit 21 do not need to be frequently started and stopped, thereby improving the service life of the units.

[0060] Please continue to refer to Figure 1 As shown, in this embodiment, the media mixing and supply system further includes a second flow control valve 60, which is disposed in the second bypass line 40. The second flow control valve 60 can be a solenoid valve, a gate valve, a ball valve, or the like. The specific valve type of the second flow control valve 60 can be adaptively adjusted based on actual usage requirements. The principle, structure, and installation method of the second flow control valve 60 are all conventional and will not be further described here.

[0061] The provision of the second flow control valve 60 facilitates closing or opening the second bypass line 40, selectively connecting the low-temperature water inlet line 12 of the low-temperature circulation loop 10 with the medium-temperature water inlet line 22 of the medium-temperature circulation loop 20 based on actual operating conditions. This allows for flexible adjustment of the media flow path of the entire supply system to adapt to different load conditions and ensure that the entire system operates at a high-efficiency operating point. Furthermore, the second flow control valve 60 is also used to adjust the flow rate of the second bypass line 40, thereby adjusting the high-temperature media flowing back into the low-temperature water inlet line 12 to ensure an appropriate load increase for the low-temperature circulation loop 10, thereby ensuring that the low-temperature circulation loop 10 operates within a high-efficiency operating range.

[0062] In this embodiment, it is preferred that the first flow regulating valve 50 and the second flow regulating valve 60 are opened at the same time, and the diversion flow of the first bypass line 30 and the return flow of the second bypass line 40 are the same to ensure that the circulating medium flow in the entire low-temperature circulation loop 10 and the medium-temperature circulation loop 20 remains constant.

[0063] In this embodiment, a first bypass line 30 and a second bypass line 40 are provided. In alternative embodiments, only the first bypass line 30 may be provided. Since the medium at the liquid outlet of the low-temperature refrigeration unit 11 is continuously diverted by the first bypass line 30, it is necessary to replenish the low-temperature circulation loop 10 to ensure a constant medium flow rate in the low-temperature circulation loop 10. Since the medium-temperature circulation loop 20 is continuously replenished by the first bypass line 30, it is necessary to drain the medium-temperature circulation loop 20 to ensure a constant medium flow rate in the medium-temperature circulation loop 20.

[0064] Please continue to refer to Figure 1 As shown, the low-temperature circulation pump 14 is located between the connection point between the second bypass line 40 and the low-temperature water inlet line 12 and the liquid inlet of the low-temperature refrigeration unit 11. Preferably, the low-temperature circulation pump 14 is located near the liquid inlet of the low-temperature refrigeration unit 11. This defined position of the low-temperature circulation pump 14 helps ensure a constant flow of medium at the liquid inlet of the low-temperature refrigeration unit 11, while also ensuring that the mixed medium of the high-temperature medium returning from the second bypass line 40 and entering the low-temperature water inlet line 12 is fully mixed by the low-temperature circulation pump 14.

[0065] Similarly, the medium-temperature circulation pump 25 is located between the connection point between the second bypass line 40 and the medium-temperature water inlet line 22 and the liquid inlet of the medium-temperature refrigeration unit 21. Preferably, the medium-temperature circulation pump 25 is arranged at a position close to the liquid inlet of the medium-temperature refrigeration unit 21. By limiting the position of the medium-temperature circulation pump 25, it is beneficial to ensure that the medium flow rate at the liquid inlet of the medium-temperature refrigeration unit 21 is constant. Moreover, the relative position of the low-temperature circulation pump 14 in the low-temperature circulation loop 10 is roughly consistent with the relative position of the medium-temperature circulation pump 25 in the medium-temperature circulation loop 20, which is beneficial to ensure the overall balance of the entire medium mixing supply system.

[0066] The medium-temperature circulation loop 20 also includes a temperature detection component 24, which is arranged on the medium-temperature water outlet pipe 23; the connection position between the first bypass pipe 30 and the medium-temperature water outlet pipe 23 is located between the liquid outlet of the medium-temperature refrigeration unit 21 and the temperature detection component 24.

[0067] Temperature detection assembly 24 is used to detect the temperature of the medium in medium-temperature water outlet pipe 23. The aforementioned position of temperature detection assembly 24 allows it to detect the temperature of the mixed medium in medium-temperature water outlet pipe 23. The detected temperature serves as a basis for adjusting the opening of first flow control valve 50 to ensure that the mixed medium temperature meets the requirements of the medium-temperature medium device.

[0068] Please continue to refer to Figure 1As shown, further, in this embodiment, the temperature detection component 24 includes a first temperature detection component 241 and a second temperature detection component 242. The first temperature detection component 241 is arranged on the medium-temperature water outlet pipe 23 and is close to the side of the connection position. The connection position here refers to the connection position between the first bypass pipe 30 and the medium-temperature water outlet pipe 23. The second temperature detection component 242 is arranged on the medium-temperature water outlet pipe 23 and is close to the side of the liquid inlet of the medium-temperature medium device. Taking the entire medium-temperature water outlet pipe 23 as a reference, if the middle position of the length of the medium-temperature water outlet pipe 23 is close to the above-mentioned connection position, it can be determined as "close to the side of the connection position", and if the middle position of the length of the medium-temperature water outlet pipe 23 is close to the side of the liquid inlet of the medium-temperature medium device 80, it can be determined as close to the side of the liquid inlet of the medium-temperature medium device 80.

[0069] The first temperature detecting member 241 and the second temperature detecting member 242 can be existing temperature sensors applicable to pipeline fluid temperature detection, such as NTC temperature sensors. The first temperature detecting member 241 and the second temperature detecting member 242 can be directly purchased from existing temperature sensors. The structure, principle, and installation method of the temperature sensors are all known in the art and will not be further described here.

[0070] Preferably, in this embodiment, the first temperature detecting element 241 is located proximate to the aforementioned connection location, and the second temperature detecting element 242 is located proximate to the liquid inlet of the medium-temperature medium device 80. The second temperature detecting element 242 is used to detect a second real-time temperature, which is compared with the first real-time temperature detected by the first temperature detecting element 241 to verify the effectiveness of the medium-temperature medium supply after mixing by the medium-temperature medium device 80. The second temperature detecting element 242 also provides an alarm mechanism. When the second real-time temperature detected by the second temperature detecting element 242 deviates significantly from the target temperature, an alarm is generated by the second temperature detecting element 242 itself or by an alarm.

[0071] The first temperature detection component 241, the first flow control valve 50 and the second flow control valve 60 can be communicatively connected to the control unit 90. The control unit 90 is, for example, a PLC, a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc.

[0072] The first temperature detection element 241 transmits the detected first real-time temperature value to the control unit 90. The control unit 90 compares the first real-time temperature value with the target temperature value and uses PID feedback to control the opening of the first flow control valve 50 and the second flow control valve 60 to accurately control the mixed medium supply temperature in the medium-temperature water outlet pipeline 23.

[0073] In this embodiment, two temperature detection elements, a first temperature detection element 241 and a second temperature detection element 242, are provided for temperature detection. In other alternative embodiments, one temperature detection element or three or more temperature detection elements may be provided to meet temperature detection requirements.

[0074] In this embodiment, a temperature detection component 24 is provided in the medium-temperature circulation loop 20, which is mainly used to detect the temperature of the mixed medium in the medium-temperature water outlet pipe 23. No corresponding temperature detection component is provided in the low-temperature circulation loop 10 because the existing low-temperature refrigeration unit 11 and the medium-temperature refrigeration unit 21 generally include a temperature detection function to accurately control the temperature of the medium at their liquid outlets. In other alternative embodiments, if the low-temperature refrigeration unit 11 does not include a corresponding temperature detection function, a corresponding temperature detection component can be added to its low-temperature water outlet pipe 13, or a corresponding temperature detection component can be added to other locations of the low-temperature circulation loop 10 and the medium-temperature circulation loop 20 based on actual usage requirements.

[0075] In other alternative embodiments, flow sensors may be provided on the first bypass line 30 and the second bypass line 40 to detect the flow of the diverted flow or the reflux flow.

[0076] Please refer to Figure 1 and Figure 2 As shown, it is taken as an example that the target temperature of the medium refrigeration in the medium temperature circulation loop 20 is 12°C.

[0077] When the first real-time temperature value detected by the first temperature detection element 241 is greater than 12°C, the first flow control valve 50 is opened wider, the medium flow Q2 diverted from the first bypass line 30 increases, and the second flow control valve 60 is opened wider, the medium flow Q6 refluxed from the second bypass line 40 increases. The flow relationship is as follows:

[0078] Q2=Q6;

[0079] Q1=Q2+Q3;

[0080] Q5=Q2+Q4.

[0081] In addition, the temperature is detected by the second temperature detecting element 242, and if the detected second real-time temperature is greater than 12.5°C, an alarm is processed.

[0082] Similarly, when the first real-time temperature value detected by the first temperature detection element 241 is less than 12°C, the first flow control valve 50 is opened less, the medium flow Q2 diverted from the first bypass line 30 is reduced, and the second flow control valve 60 is opened less, and the medium flow Q6 refluxed from the second bypass line 40 is reduced. The flow relationship is as follows:

[0083] Q2=Q6;

[0084] Q5=Q4+Q6;

[0085] Q1=Q6+Q3;

[0086] In addition, the temperature is detected by the second temperature detecting element 242. If the detected second real-time temperature is less than 11.5°C, an alarm is triggered.

[0087] Please refer to Figures 3 to 5 As shown, Figure 3 The following is a unit operating condition curve, with the horizontal axis representing the load percentage and the vertical axis representing the energy efficiency ratio (COP). The curve shows that when the rated operating condition is between 50% and 95% of the load percentage, the unit can operate stably for a long time and at a relatively high energy efficiency ratio.

[0088] Figure 3 The middle operating point A is the operating point of the low temperature circulation loop 10 operating alone. Figure 3 and Figure 4 It can be seen that when the low-temperature circulation loop 10 is at this operating point, the actual motor load percentage corresponding to the low-temperature refrigeration unit 11 is 22%, and the energy efficiency ratio is 2.1 (see Figure 3 The low-temperature refrigeration unit 11 needs to run a chilled water pump and a cooling water pump. Since the low-temperature refrigeration unit 11 operates at a low load, the low-temperature refrigeration unit 11 needs to be frequently started and stopped. On the one hand, the operating efficiency of the low-temperature refrigeration unit 11 is low and the energy consumption is high. On the other hand, frequent start and stop also shortens the service life of the unit.

[0089] Figure 3 The medium operating point B is the operating point of the medium temperature circulation loop 20 alone. Figure 3 and Figure 4 It can be seen that when the medium temperature circulation loop 20 is at this operating point, the actual motor load percentage corresponding to the medium temperature refrigeration unit 21 is 40%, and the energy efficiency ratio is 4.1 (see Figure 3 The medium-temperature refrigeration unit 21 needs to run a chilled water pump and a cooling water pump. The medium-temperature refrigeration unit 21 is in low-load operation, and its operating efficiency is low and energy consumption is high.

[0090] Figure 3The medium operating point C is the operating point when the first flow regulating valve 50 and the second flow regulating valve 60 are opened and the medium temperature refrigeration unit 21 is closed. At this time, the medium temperature circulation loop 20 is loaded on the low temperature circulation loop 10 as a load, and the low temperature circulation loop 10 and the medium temperature circulation loop 20 are in mixed water operation mode. Figure 3 and Figure 5 As shown, when the temperature cycle loop 10 is at this operating point, the actual motor load percentage corresponding to the low-temperature refrigeration unit 11 is 62%, and the energy efficiency ratio is 5.2 (see Figure 3 The vertical coordinate of the working condition point C); at this time, the low-temperature refrigeration unit 11 needs to run a chilled water pump and a cooling water pump. The low-temperature refrigeration unit 11 operates within a reasonable load range (the load percentage is between 50% and 95%). Therefore, the low-temperature refrigeration unit 11 operates smoothly, and the low-temperature refrigeration unit 11 has a high operating efficiency and low energy consumption. Please continue to combine Figure 3 and Figure 5 As shown, since the motor of the medium-temperature refrigeration unit 21 is turned off, the actual motor load percentage corresponding to the medium-temperature refrigeration unit 21 is 0%; at this time, only one chilled water pump is required in the medium-temperature refrigeration unit 21 to operate at a low frequency, the cooling water pump is in a closed state, and the medium-temperature circulation loop 20 is in a closed state as a whole, which helps to reduce energy consumption and also improves the phenomenon of shortened equipment life due to frequent start and stop of the medium-temperature refrigeration unit 21.

[0091] Please refer to Figure 6 As shown, the electricity cost of the low-temperature circulation loop 10 and the medium-temperature circulation loop 20 operating independently is compared with the electricity cost of the low-temperature circulation loop 10 and the medium-temperature circulation loop 20 operating in a mixed water mode. Figure 6 The data was compiled using the operating load for 12 months (June through December, and January through May of the following year), and the electricity costs for six months of low-load operation (November through December, and January through April of the following year). When low-temperature circulation loop 10 and medium-temperature circulation loop 20 operate independently in mixed water mode, they achieve monthly electricity cost savings of approximately 45% to 65%, with an average cost savings of 55.6%, demonstrating significant energy savings.

[0092] To sum up, the media mixing supply system includes: a low-temperature circulation loop 10, a medium-temperature circulation loop 20 and a first bypass pipeline 30; the low-temperature circulation loop 10 includes a low-temperature refrigeration unit 11, a low-temperature water inlet pipeline 12 and a low-temperature water outlet pipeline 13, the low-temperature water inlet pipeline 12 is connected to the liquid inlet of the low-temperature refrigeration unit 11, and the low-temperature water outlet pipeline 13 is connected to the liquid outlet of the low-temperature refrigeration unit 11; the medium-temperature circulation loop 20 includes a medium-temperature refrigeration unit 21, a medium-temperature water inlet pipeline 22 and a medium-temperature water outlet pipeline 23, the medium-temperature water inlet pipeline 22 is connected to the liquid inlet of the medium-temperature refrigeration unit 21, and the medium-temperature water outlet pipeline 23 is connected to the liquid outlet of the medium-temperature refrigeration unit 21; the first bypass pipeline 30 is connected between the low-temperature water outlet pipeline 13 and the medium-temperature water outlet pipeline 23.

[0093] With this configuration, the first bypass line 30 allows a portion of the medium at the outlet of the low-temperature refrigeration unit 11 to be diverted to the medium-temperature water outlet line 23. When the load on the low-temperature circulation loop 10 and the medium-temperature circulation loop 20 is low, the medium-temperature refrigeration unit 21 can be shut down. In this case, the medium-temperature refrigeration unit 21 functions simply as a connecting line. A portion of the low-temperature medium cooled by the low-temperature refrigeration unit 11 can be diverted through the first bypass line 30 to the medium-temperature water outlet line 23. This diverted low-temperature medium mixes with the high-temperature medium in the medium-temperature water outlet line 23 to form medium-temperature medium, which is then supplied to the medium-temperature medium device 80. At this time, the medium-temperature circulation loop 20 acts as a load and is loaded into the low-temperature circulation loop 10. On the one hand, the load of the low-temperature circulation loop 10 is increased, which is conducive to making the operating conditions of the low-temperature circulation loop 10 within the rated operating conditions to ensure higher operating efficiency and thus reduce energy consumption; on the other hand, the medium-temperature refrigeration unit 21 is turned off, that is, the low-temperature circulation loop 10 and the medium-temperature circulation loop 20 realize cooling through the low-temperature refrigeration unit 11, further reducing energy consumption; and the low-temperature refrigeration unit 11 and the medium-temperature refrigeration unit 21 do not need to be frequently started and stopped, thereby increasing the service life of the units.

[0094] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0095] The above description is only a description of the preferred embodiment of the present invention and does not limit the scope of the present invention. Any changes and modifications made by ordinary technicians in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A medium mixing supply system, characterized in that: include: A low-temperature circulation loop, a medium-temperature circulation loop, and a first bypass pipeline; The low-temperature circulation loop includes a low-temperature refrigeration unit, a low-temperature water inlet pipeline and a low-temperature water outlet pipeline, wherein the low-temperature water inlet pipeline is connected to the liquid inlet of the low-temperature refrigeration unit, and the low-temperature water outlet pipeline is connected to the liquid outlet of the low-temperature refrigeration unit; The medium-temperature circulation loop includes a medium-temperature refrigeration unit, a medium-temperature water inlet pipeline and a medium-temperature water outlet pipeline, wherein the medium-temperature water inlet pipeline is connected to the liquid inlet of the medium-temperature refrigeration unit, and the medium-temperature water outlet pipeline is connected to the liquid outlet of the medium-temperature refrigeration unit; The first bypass pipeline is connected between the low-temperature water outlet pipeline and the medium-temperature water outlet pipeline.

2. The media mixing and supplying system according to claim 1, wherein: The medium mixing supply system further includes a second bypass line; The second bypass pipeline is connected between the low-temperature water inlet pipeline and the medium-temperature water inlet pipeline.

3. The media mixing and supplying system according to claim 1, wherein: The medium mixing and supply system further includes a first flow regulating valve, which is disposed in the first bypass line.

4. The media mixing and supplying system according to claim 2, wherein: The medium mixing and supply system further includes a second flow regulating valve, which is disposed in the second bypass line.

5. The media mixing and supplying system according to claim 1, wherein: The medium temperature circulation loop further includes a temperature detection component, which is arranged in the medium temperature water outlet pipe. The connection position between the first bypass pipeline and the medium-temperature water outlet pipeline is located between the liquid outlet of the medium-temperature refrigeration unit and the temperature detection component.

6. The media mixing and supplying system according to claim 5, wherein: The temperature detection component includes a first temperature detection component, which is arranged on the medium-temperature water outlet pipeline and close to one side of the connection position.

7. The media mixing and supplying system according to claim 6, wherein: The temperature detection assembly includes a second temperature detection component, which is arranged on the medium-temperature water outlet pipeline and close to the liquid inlet of the medium-temperature medium equipment.

8. The media mixing and supplying system according to claim 2, wherein: The low-temperature circulation loop further includes a low-temperature circulation pump, which is arranged in the low-temperature water inlet pipeline.

9. The media mixing and supplying system according to claim 2, wherein: The medium-temperature circulation loop further includes a medium-temperature circulation pump, which is arranged in the medium-temperature water inlet pipeline.

10. The media mixing and supplying system according to claim 8 or 9, characterized in that: When the low-temperature circulation loop includes a low-temperature circulation pump, the low-temperature circulation pump is located between the connection position of the second bypass pipeline and the low-temperature water inlet pipeline and the liquid inlet of the low-temperature refrigeration unit; And / or, when the medium-temperature circulation loop includes a medium-temperature circulation pump, the medium-temperature circulation pump is located between the connection position of the second bypass pipeline and the medium-temperature water inlet pipeline and the liquid inlet of the medium-temperature refrigeration unit.

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