Cold spot cooling system

Abstract

The embodiment of the utility model provides a cold point cooling system. The cold point cooling system comprises a main pipeline, a branch pipeline, a liquid taking valve, a heat exchanger and a first sub-pipeline. The branch pipeline comprises a first water inlet end and a first water outlet end, and the first water inlet end is selectively communicated with the main pipeline; the liquid taking valve is arranged on the branch pipeline, and the first water outlet end is arranged between the liquid taking valve and the first water inlet end; the heat exchanger communicates with the branch pipeline and is arranged between the first water inlet end and the first water outlet end; the first sub-pipeline comprises a second water inlet end, the second water inlet end is communicated with the first water outlet end, and the first sub-pipeline is provided with a first sub-pipeline valve. According to the cold point cooling system provided by the embodiment of the invention, the injection water pressure requirement of the cold point can be met, and the use range of the injection water in the pipeline can be expanded; generation of stagnant water in the branch pipelines is reduced, and the probability that cold points are polluted by microorganisms and the like is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of water for injection, and in particular to a cold spot cooling system. Background Art

[0002] Water for injection is obtained by distilling purified water and should comply with relevant regulations, including those in the Chinese Pharmacopoeia. Water for injection is widely used in the pharmaceutical industry, including for preparing injections, washing equipment, and dissolving drugs. Its quality is a key factor affecting product quality.

[0003] Water for injection (WFI) generally needs to be maintained above 70°C to ensure sterility. During the production process, WFI is typically kept above 70°C for circulation. However, some production processes require WFI at lower temperatures, requiring cooling. To minimize contamination, heat exchangers are often used to cool WFI.

[0004] In the related art, a low-temperature circulation pipeline and a high-temperature circulation pipeline are usually set up. The injection water in the high-temperature circulation pipeline enters the low-temperature circulation pipeline after being cooled by a heat exchanger. The low-temperature circulation pipeline is provided with a cold spot for the use of low-temperature injection water. The temperature of the injection water entering the low-temperature circulation pipeline is controlled by controlling the flow rate of the high-temperature circulation pipeline entering the heat exchanger. However, this method will cause the pressure at the cold spot to drop, making it difficult to use higher-pressure injection water at the cold spot, thereby narrowing the range of working conditions that the injection water in the pipeline can be applied to. Summary of the Invention

[0005] Based on this, an embodiment of the present application provides a cold spot cooling system that is conducive to expanding the range of applicable working conditions of the cold spot.

[0006] The present invention provides a cold spot cooling system, which includes:

[0007] Main road;

[0008] a branch pipe, the branch pipe comprising a first water inlet end and a first water outlet end, the first water inlet end being selectively connected to the main pipe;

[0009] A liquid extraction valve is provided on the branch pipe, and the first water outlet is provided between the liquid extraction valve and the first water inlet;

[0010] a heat exchanger, the heat exchanger being in communication with the branch pipe and being disposed between the first water inlet and the first water outlet;

[0011] The first sub-pipeline includes a second water inlet end, the second water inlet end is communicated with the first water outlet end, and the first sub-pipeline is provided with a first sub-pipeline valve.

[0012] In some embodiments, the cold spot cooling system has a high temperature operating state and a cold spot cooling state, the main line has a water inlet, a first water outlet and a second water outlet both connected to the water inlet, and the second water outlet is connected to the first water inlet;

[0013] In the high-temperature operating state, the injection water flows to the first water outlet through the water inlet;

[0014] In the cold spot cooling state, the injection water flows in through the water inlet and flows from the second water outlet to the first water inlet end.

[0015] In some embodiments, the heat exchanger comprises:

[0016] Cooling pipeline for conveying cooling fluid;

[0017] A cooling pipeline, used for conveying water for injection, the cooling pipeline being in communication with the branch pipeline, and heat exchange between the cooling fluid and the water for injection being possible through the cooling pipeline and the cooling pipeline;

[0018] a first temperature detecting member, provided at the end of the cooling pipeline where the injection water flows out, for detecting the temperature of the end of the cooling pipeline where the injection water flows out;

[0019] a regulating valve capable of regulating the flow of the cooling fluid in the cooling pipeline, the regulating valve being provided in the cooling pipeline and electrically connected to the first temperature detecting element;

[0020] In the cold spot cooling state, the regulating valve can adjust the flow rate of the cooling fluid in the cooling pipeline according to the fluid temperature of the cooling water outlet detected by the first temperature detecting component.

[0021] In some embodiments, a cooling valve is provided on the side of the cooling pipeline where the cooling fluid flows in, and the regulating valve is provided on the end of the cooling pipeline where the cooling fluid flows out.

[0022] In some embodiments, the cold spot cooling system is provided with an interlayer space and a clean space, the interlayer space is provided on the side of the clean space that is away from the direction of gravity along the direction of gravity, the heat exchanger and part of the branch pipeline are provided in the interlayer space, and the main pipeline, part of the branch pipeline, the liquid extraction valve and the first sub-pipeline are provided in the clean space.

[0023] In some embodiments, the cold spot cooling system further includes a second sub-pipeline, the second sub-pipeline includes a third water inlet end, the third water inlet end is connected to the branch pipe, the connection position between the third water inlet end and the branch pipe is located on the side of the branch pipe away from the heat exchanger between the first water inlet end and the heat exchanger, and the second sub-pipeline is provided with a second sub-pipeline valve.

[0024] In some embodiments, the cold spot cooling system further comprises:

[0025] a second connecting pipe, provided with a second control valve, wherein a first end of the second connecting pipe is connected to the first water inlet end;

[0026] a steam pipeline for conveying steam, the steam pipeline being provided with a steam pipeline valve, the steam pipeline being connected to the second end of the second connecting pipeline;

[0027] The clean pipeline is used to transport clean gas. The clean pipeline is provided with a clean pipeline valve. The clean pipeline is connected to the second end of the second connecting pipeline.

[0028] In some embodiments, the first sub-pipeline is provided with a second temperature detecting component, and the second temperature detecting component is provided on a side of the first sub-pipeline valve away from the second water inlet end.

[0029] In some embodiments, the cold spot cooling system further comprises:

[0030] a first drain pipeline, provided with a third control valve and a first drain valve, the first drain pipeline being connected to the first sub-pipeline, the first drain valve being located at an end of the third control valve away from a position where the first drain pipeline is connected to the first sub-pipeline;

[0031] The second drain pipeline is provided with a fourth control valve and a second drain valve. The second drain pipeline is connected to the second sub-pipeline. The second drain valve is located at one end of the fourth control valve away from the position where the second drain pipeline is connected to the second sub-pipeline.

[0032] In some embodiments, the cold spot cooling system includes a first sampling valve and a second sampling valve, wherein the first sampling valve is arranged between the heat exchanger and the second water inlet end, and the second sampling valve is arranged at the connection point between the main line and the branch line.

[0033] The cold spot cooling system provided in the embodiment of the present application cools the injection water through a heat exchanger arranged on a branch pipeline. The flow of the injection water in the branch pipeline is subject to little resistance, which is beneficial to reducing the pressure drop of the injection water, thereby helping to meet the injection water pressure demand of the cold spot, helping to increase the pressure of the injection water at the cold spot, and thus helping to expand the scope of use of the injection water in the pipeline; by setting up the first sub-pipeline, it is beneficial to discharge the injection water that has not reached the second temperature generated during the cooling process, which is beneficial to reducing the generation of dead water in the branch pipeline and thus helping to reduce the chance of contamination by microorganisms and the like at the cold spot. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 Schematic diagram of a cold spot cooling system in one embodiment of the present application.

[0035] Description of reference numerals:

[0036] 10. Main pipeline; 11a. Water inlet; 12a. First water outlet; 12b. Second water outlet; 20. Branch pipeline; 21a. First water inlet; 21b. First water outlet; 30. Liquid extraction valve; 40. Heat exchanger; 41. Cooling pipeline; 411. Cooling valve; 42. First temperature detector; 43. Regulating valve; 50. First sub-pipeline; 51a. Second water inlet; 52. Second temperature detector; 53. First sub-pipeline valve; 54. Third sub-pipeline valve; 60. Second sub-pipeline; 61a. Third water inlet; 62. Second sub-pipeline valve; 63. Fourth sub-pipeline valve ; 70, second connecting pipeline; 71, second control valve; 80, steam pipeline; 81, steam pipeline valve; 90, clean pipeline; 91, clean pipeline valve; 100, first drain pipeline; 101, third control valve; 102, first drain valve; 103, fourth control valve; 104, second drain valve; 105, second drain pipeline; 106, first sampling valve; 107, second sampling valve; 201, first connecting pipeline; 202, first control valve; 203, discharge pipeline; 204, cooling discharge valve; mezzanine space 300a; clean space 400a. DETAILED DESCRIPTION

[0037] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0038] In the description of this application, it should be understood that if the terms "length", "width", "thickness", "up", "down", "front", "back", "vertical", "top", "bottom", "inside", "outside", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0039] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0040] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0041] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0042] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If applicable, the terms "upper," "lower," and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0043] The present application provides a cold spot cooling system. Figure 1 The cold spot cooling system includes a main line 10, a branch line 20, a liquid extraction valve 30, a heat exchanger 40 and a first sub-line 50. The injection water in the main line 10 has a first temperature; the branch line 20 includes a first water inlet end 21a and a first water outlet end 21b, and the first water inlet end 21a is selectively connected to the main line 10 so that the injection water can selectively flow into the branch line 20; the liquid extraction valve 30 is provided on the branch line 20, and the first water outlet end 21b is provided between the liquid extraction valve 30 and the first water inlet end 21a; the heat exchanger 40 is connected to the branch line 20, and the heat exchanger 40 is provided between the first water inlet end 21a and the first water outlet end 21b. The injection water in the main line 10 flows into the branch line 20 and can be connected to the branch line 20. The cooling fluid in the heat exchanger 40 placed on the branch pipe 20 exchanges heat to cool the injection water so that the injection water reaches a second temperature. It can be understood that the first temperature is higher than the second temperature; the first sub-pipeline 50 includes a second water inlet end 51a, and the second water inlet end 51a is connected to the first water outlet end 21b. The injection water can flow from the first water outlet end 21b into the second water inlet end 51a, and then into the first sub-pipeline 50. The first sub-pipeline 50 is provided with a first sub-pipeline valve 53. The opening and closing of the first sub-pipeline valve 53 can control whether the injection water can flow into the first sub-pipeline 50.

[0044] It is understandable that the specific values ​​of the first temperature and the second temperature can vary according to specific needs.

[0045] It should be noted that the cold spot refers to the point in branch line 20 where the water for injection is used after being cooled by heat exchanger 40, i.e., the point where the water for injection at the second temperature is discharged. When liquid dispensing valve 30 is opened, the water for injection at the second temperature can flow from branch line 20 through liquid dispensing valve 30, thereby forming a cold spot on the side of liquid dispensing valve 30 where the water for injection is discharged.

[0046] It should be noted that there is a medium between the cooling fluid in the heat exchanger 40 and the injection water flowing into the heat exchanger 40, and heat is transferred through the medium. This is helpful to reduce the possibility of mixing of the injection water and the cooling fluid, thereby affecting the normal operation of the cold spot cooling system.

[0047] It is understood that when the injection water flows from the main line 10 into the branch line 20 and then to the heat exchanger 40, it is difficult for the heat exchanger 40 to completely reduce the initial injection water temperature from the first to the second temperature. As a result, some injection water that does not reach the second temperature is produced. The injection water that does not reach the second temperature cannot be used and needs to be discharged from the branch line 20. Therefore, the first sub-line valve 53 is opened and the liquid extraction valve 30 is closed, allowing the injection water that does not reach the second temperature to flow into the first sub-line 50, thereby allowing the injection water that does not reach the second temperature to be discharged from the branch line 20. The provision of the first sub-line 50 facilitates the discharge of the injection water that does not reach the second temperature.

[0048] It is understood that when the injection water in branch line 20 reaches the second temperature, first sub-valve 53 is closed, and liquid extraction valve 30 is opened. The injection water flows from main line 10 into branch line 20, then flows directly out through liquid extraction valve 30 for use at the cold spot. During the process of the injection water flowing from main line 10 and out through liquid extraction valve 30, it encounters little resistance, thereby minimizing the drop in the injection water pressure.

[0049] The cold spot cooling system provided in the embodiment of the present application cools the injection water by means of a heat exchanger 40 provided on the branch pipe 20, so that the flow resistance of the injection water in the branch pipe 20 is small, which is beneficial to reducing the pressure drop of the injection water, thereby facilitating meeting the injection water pressure demand of the cold spot, facilitating increasing the pressure of the injection water at the cold spot, and thereby facilitating expanding the scope of use of the injection water in the pipeline; by providing the first sub-pipeline 50, it is beneficial to discharge the injection water that has not reached the second temperature generated during the cooling process, thereby reducing the generation of dead water in the branch pipe 20 and thereby reducing the probability of contamination by microorganisms and the like at the cold spot.

[0050] In some specific embodiments of the present application, the liquid extraction valve 30 is a pneumatic diaphragm valve.

[0051] In some specific embodiments of the present application, the first sub-way valve 53 is a pneumatic diaphragm valve.

[0052] In some embodiments, the specific number of the liquid extraction valves 30 is two or more, and the two or more liquid extraction valves 30 are spaced apart along the extension direction of the branch pipeline 20. In this way, by adding liquid extraction valves 30, more water outlet points for injection water can be added, which is conducive to meeting the demand for injection water.

[0053] In some embodiments, see Figure 1 The cold spot cooling system includes a first connecting pipe 201, which connects the main pipe 10 and the first water inlet 21a. The first connecting pipe 201 is provided with a first control valve 202 to facilitate control of whether the main pipe 10 and the first water inlet 21a are connected.

[0054] In some specific embodiments of the present application, the first control valve 202 is a pneumatic diaphragm valve.

[0055] In some embodiments, see Figure 1 A first sampling valve 106 is provided at the connection point between the main pipeline 10 and the branch pipeline 20, through which the water for injection in the pipeline can be taken out. This is beneficial for detecting the water for injection entering the branch pipeline 20 in the cold spot cooling system.

[0056] In some specific embodiments of the present application, the first control valve 202 and the first sampling valve 106 are integrated.

[0057] Specifically, the integrated valve of the first control valve 202 and the first sampling valve 106 is a pneumatic ibody diaphragm valve with manual sampling.

[0058] In some embodiments, see Figure 1 A second sampling valve 107 is provided on the branch line 20 between the heat exchanger 40 and the second water inlet end 51a, through which the water for injection in the branch line 20 can be taken out. This is beneficial for detecting the water for injection in the branch line 20.

[0059] In some specific embodiments of the present application, a first sampling valve 106 is provided at the connection between the main pipeline 10 and the branch pipeline 20, and a second sampling valve 107 is provided on the branch pipeline 20 between the heat exchanger 40 and the second water inlet end 51a. This facilitates the testing of injection water at different locations in the pipeline, further facilitating the need for monitoring the quality of injection water.

[0060] In some embodiments, the cold spot cooling system has a high temperature operation state and a cold spot cooling state, see Figure 1 The main line 10 has a water inlet 11a, a first water outlet 12a and a second water outlet 12b both connected to the water inlet 11a, and the second water outlet 12b is connected to the first water inlet end 21a;

[0061] The high temperature operation state means that the injection water in the main line 10 has a first temperature, the main line 10 is disconnected from the branch line 20, and the injection water in the main line 10 flows directly from the water inlet 11a to the first water outlet 12a.

[0062] The cold spot cooling state means that the main line 10 is connected to the branch line 20, the liquid extraction valve 30 is closed, and the injection water with the first temperature flows from the main line 10 through the second water outlet 12b into the branch line 20. The injection water with the first temperature flows through the heat exchanger 40 for cooling. The first sub-line valve 53 is opened, and the injection water that has not reached the second temperature flows out of the branch line 20 through the first sub-line 50. When the injection water reaches the second temperature, the first sub-line valve 53 is closed, and the liquid extraction valve 30 can be opened to supply water to the cold spot.

[0063] When the cold spot is no longer used, the main line 10 is disconnected from the branch line 20, and the cold spot cooling system returns to a high-temperature operating state.

[0064] In this way, the high-temperature operation state is conducive to the cold spot cooling system outputting injection water with a higher temperature; the cold spot cooling state can cool the water flowing into the branch pipe 20, which is conducive to the cold spot cooling system outputting injection water with a lower temperature.

[0065] In some embodiments, see Figure 1 The heat exchanger 40 includes a cooling pipeline 41, a temperature-lowering pipeline, a first temperature detecting element 52, and a regulating valve 43. The cooling pipeline 41 is used to transport cooling fluid; the temperature-lowering pipeline is used to transport water for injection. The temperature-lowering pipeline is connected to the branch pipeline 20, and heat can be exchanged between the cooling fluid and the water for injection through the cooling pipeline 41 and the temperature-lowering pipeline. The first temperature detecting element 52 is provided at the end of the temperature-lowering pipeline where the water for injection flows out, and is used to detect the temperature of the end of the temperature-lowering pipeline where the water for injection flows out. The regulating valve 43 can adjust the flow rate of the cooling fluid in the cooling pipeline 41. The regulating valve 43 is provided in the cooling pipeline 41 and is electrically connected to the first temperature detecting element 52. The cooperation between the regulating valve 43 and the first temperature detecting element 52 facilitates the precise control of the temperature of the water for injection when it flows out of the heat exchanger 40.

[0066] In the cold spot cooling state, the regulating valve 43 can adjust the flow rate of the cooling fluid in the cooling pipeline 41 based on the temperature of the injection water outlet end of the cooling pipeline detected by the first temperature detection element 52. By adjusting the flow rate of the cooling fluid, the speed at which the cooling fluid removes heat from the injection water is adjusted, thereby controlling the temperature of the injection water flowing out of the heat exchanger 40, rather than controlling the injection water temperature by controlling the flow rate of the injection water. This helps reduce the resistance to the injection water during the heat exchange process, and thus helps reduce the pressure drop of the injection water during the heat exchange process.

[0067] It should be noted that the specific type of the cooling fluid is not limited. For example, the cooling fluid can be cooling water, cooling air, or other cooled fluids.

[0068] In some specific embodiments of the present application, the regulating valve 43 is a pneumatic proportional regulating angle seat valve.

[0069] In some specific embodiments of the present application, the first temperature detecting component 52 is a temperature transmitter.

[0070] In some embodiments, please refer to Figure 1 A cooling valve 411 is provided on one side of the cooling pipe 41 where the cooling fluid flows in, and a regulating valve 43 is provided on one end of the cooling pipe 41 where the cooling fluid flows out.

[0071] In this way, the cooling valve 411 and the regulating valve 43 are arranged on opposite sides of the cooling pipeline 41 along the flow direction of the cooling fluid, which is beneficial to reducing the impact of the regulating valve 43 on the cooling pipeline 41 and the cooling valve 411 when adjusting the flow of the cooling pipeline 41, and thus is beneficial to stabilizing the flow of the cooling fluid in the cooling pipeline 41.

[0072] In some specific embodiments of the present application, the cooling valve 411 is a pneumatic angle seat valve.

[0073] In some specific embodiments of the present application, the heat exchanger 40 also includes a discharge pipeline 203 for discharging the cooling fluid in the heat exchanger 40 to reduce the probability of the cooling fluid forming dead water and causing microbial contamination. The discharge pipeline 203 is provided with a cooling discharge valve 204 for controlling the opening and closing of the discharge pipeline 203.

[0074] In some specific embodiments of the present application, the cooling discharge valve 204 is a pneumatic angle seat valve.

[0075] In some embodiments, please refer to Figure 1 , Figure 1 The middle direction Y indicates the direction of gravity. The cold spot cooling system is provided with an interlayer space 300a and a clean space 400a. The interlayer space 300a is provided on the side of the clean space 400a away from the direction of gravity along the gravity direction. The interlayer space 300a is isolated from the clean space 400a to reduce the impact of the interlayer space 300a on the clean space 400a; the heat exchanger 40 and part of the branch pipe 20 are provided in the interlayer space 300a, and the main pipe 10, part of the branch pipe 20, the liquid extraction valve 30 and the first sub-pipeline 50 are provided in the clean space 400a. In this way, by arranging the heat exchanger 40 and part of the branch pipe 20 in the interlayer space 300a, it is beneficial to reduce the volume of the clean space 400a, and thus it is beneficial to reduce costs.

[0076] It should be noted that the interlayer space 300a is isolated from the clean space 400a and the two are not connected. Figure 1 The specific structure of isolating the interlayer space 300a from the clean space 400a is not shown.

[0077] It should be noted that the clean space 400a refers to a space where the concentration of airborne particles and microorganisms, as well as temperature, humidity, pressure and other parameters are controlled. Strict requirements are imposed on various parameters within the clean space 400a, and therefore the cost of creating the clean space 400a is relatively high.

[0078] It should be noted that the interlayer space 300a has lower requirements on the concentration of airborne particles and microorganisms, as well as parameters such as temperature, humidity, and pressure. Therefore, compared with the clean space 400a, the cost of forming the interlayer space 300a is lower.

[0079] It should be noted that when the injection water flows in the branch pipe 20 located in the interlayer space 300a, the injection water is isolated from the interlayer space 300a by the pipe wall forming the pipe, so as to reduce the impact of microorganisms in the interlayer space 300a on the injection water.

[0080] Specifically, the second sampling valve 107 is disposed in the clean space 400 a , which helps to reduce the probability of the injection water at the second sampling valve 107 being contaminated.

[0081] Specifically, the first sampling valve 106 is disposed in the clean space 400 a , which helps to reduce the probability of the injection water at the first sampling valve 106 being contaminated.

[0082] It is understandable that when the cold spot is finished using, the liquid extraction valve 30 is closed, and the injection water in the main pipeline 10 stops flowing into the branch pipeline 20. Because the heat exchanger 40 is disposed in the interlayer space 300a, and the interlayer space 300a is located on the side of the clean space 400a that faces away from the direction of gravity, the injection water between the first water inlet end 21a and the heat exchanger 40 is at a lower point than the heat exchanger 40, making it difficult for the injection water to pass through the heat exchanger 40 and then flow out of the first sub-pipeline 50, which easily forms stagnant water, thereby increasing the probability of microorganisms growing between the first water inlet end 21a and the heat exchanger 40.

[0083] Based on this, in some embodiments, please continue to refer to Figure 1 The cold spot cooling system also includes a second sub-pipeline 60, which includes a third water inlet end 61a. The third water inlet end 61a is connected to the branch pipe 20. The connection position between the third water inlet end 61a and the branch pipe 20 is located on the side of the branch pipe 20 away from the heat exchanger 40 between the first water inlet end 21a and the heat exchanger 40. The second sub-pipeline 60 is provided with a second sub-pipeline valve 62.

[0084] When the injection water flows from the main line 10 into the branch line 20 and is cooled by the heat exchanger 40, and when the cooling is completed and the injection water after cooling is used through the liquid extraction valve 30, the second sub-line valve 62 is closed and the injection water in the branch line 20 does not flow into the second sub-line 60.

[0085] When the cold spot is not used up, since the connection position between the third water inlet end 61a and the branch pipe 20 is located on the side of the branch pipe 20 between the first water inlet end 21a and the heat exchanger 40 away from the heat exchanger 40, the injection water between the first water inlet end 21a and the heat exchanger 40 is at a lower point along the gravity direction compared to the injection water in the branch pipe 20 between the heat exchanger 40 and the first water inlet end 21a. The injection water between the first water inlet end 21a and the heat exchanger 40 can enter the second sub-pipeline 60 through the third water inlet end 61a, and then be discharged from the branch pipe 20.

[0086] In this way, the second sub-pipeline 60 can discharge the injection water between the first water inlet end 21a and the heat exchanger 40, which is beneficial to reducing the generation of dead water in the branch pipeline 20 and further beneficial to reducing the probability of microorganisms generating in the branch pipeline 20.

[0087] It should be noted that stagnant water refers to water that flows slowly or does not flow in a pipe or container. Stagnant water can provide conditions for the reproduction of microorganisms, leading to the formation of biofilms, thereby causing microbial indicators, total organic carbon indicators or endotoxin indicators to exceed the standard, making the water quality not meet the requirements.

[0088] In some specific embodiments of the present application, the first sub-circuit valve 53 is a pneumatic diaphragm valve.

[0089] In some embodiments, please refer to Figure 1 The cold spot cooling system also includes a second connecting line 70, a steam line 80, and a clean line 90. The second connecting line 70 is provided with a second control valve 71, and the first end of the second connecting line 70 is connected to the first water inlet end 21a; the steam line 80 is used to transport steam, and the steam line 80 is provided with a steam line valve 81, and the steam line 80 is connected to the second end of the second connecting line 70. It can be understood that the steam in the steam line 80 has a high temperature for sterilization; the clean line 90 is used to transport clean gas, and the clean line 90 is provided with a clean line valve 91, and the clean line 90 is connected to the second end of the second connecting line 70. Clean gas refers to gas that has been purified and filtered. Clean gas can meet the requirements of injection water for parameters such as microorganisms, suspended particulate matter, and humidity, thereby reducing the chance of injection water being contaminated.

[0090] When the cold spot is finished being used, the liquid extraction valve 30 is closed, the main line 10 is disconnected from the branch line 20, the injection water stops flowing from the main line 10 into the branch line 20, the first sub-line valve 53 and the second sub-line valve 62 are opened, and after the injection water in the branch line 20 is discharged from the injection water of the first sub-line 50 and the second sub-line 60, the liquid extraction valve 30, the first sub-line 50 valve, the second sub-line 60 valve, the second control valve 71 and the steam line valve 81 are opened, the compressed air valve remains closed, and steam flows into the branch line 20, the first sub-line 50 and the second sub-line 60 for sterilization.

[0091] After sterilization is completed, close the steam pipeline valve 81, keep the switch status of other valves unchanged, open the clean air valve 91, and clean gas flows into the branch pipeline 20, the first sub-pipeline 50 and the second sub-pipeline 60 for purging, purging the condensed water in the branch pipeline 20, the first sub-pipeline 50 and the second sub-pipeline 60, so that the branch pipeline 20, the first sub-pipeline 50 and the second sub-pipeline 60 are dry and clean.

[0092] In this way, by setting up the steam pipeline 80 and the clean pipeline 90 to sterilize the first sub-pipeline 50, the branch pipeline 20 and the second sub-pipeline 60, it is beneficial to reduce the probability of microorganisms being generated in the first sub-pipeline 50, the branch pipeline 20 and the second sub-pipeline 60, and thus help reduce the probability of injection water being contaminated by microorganisms.

[0093] In some specific embodiments of the present application, the clean gas is clean compressed air. In this way, the source of clean compressed air is wide and the processing is simple, which is conducive to cost savings. By passing the compressed air into the pipeline, it is helpful to increase the speed of air flow in the pipeline and further improve the ability to purge the pipeline.

[0094] In some specific embodiments of the present application, the steam pipeline valve 81 is a pneumatic ball valve.

[0095] In some specific embodiments of the present application, the clean line valve 91 is a pneumatic ball valve.

[0096] In some specific embodiments of the present application, the second control valve 71 is a pneumatic diaphragm valve.

[0097] In some embodiments, see Figure 1 The first sub-pipeline 50 is provided with a second temperature detecting member 52 , which is provided on a side of the first sub-pipeline valve 53 away from the second water inlet end 51 a . The second temperature detecting member 52 can detect the temperature of the steam flowing into the first sub-pipeline 50 .

[0098] In this way, based on the temperature value of the steam detected by the second temperature detection component 52, it is possible to determine whether the steam temperature in the first sub-pipeline 50 meets the standard, and the first sub-pipeline 50 is connected to the branch pipe 20, and the branch pipe 20 is connected to the second sub-pipeline 60, which is beneficial to determine the temperatures of the branch pipe 20, the first sub-pipeline 50 and the second sub-pipeline 60, and is beneficial to improving the sterilization effect; by determining whether the steam temperature of the first sub-pipeline 50 meets the standard, it is beneficial to determine and control the time for introducing steam, which is beneficial to improving the sterilization effect and saving energy.

[0099] In some specific embodiments of the present application, the second temperature detecting component 52 is a temperature transmitter.

[0100] It can be understood that when steam enters the first sub-pipeline 50, the second sub-pipeline 60 and the branch pipe 20, the steam will release heat and cool down to turn into condensed water. The condensed water has a large specific heat capacity and can absorb a large amount of heat, which is not conducive to increasing the temperature in the first sub-pipeline 50, the second sub-pipeline 60 and the branch pipe 20, and is thus not conducive to sterilization.

[0101] Based on this, in some embodiments, see Figure 1The cold spot cooling system further includes a first drain pipe 100 and a second drain pipe 105 . The first drain pipeline 100 is provided with a third control valve 101 and a first drain valve 102. The first drain pipeline 100 is connected to the first sub-pipeline 50. The first drain valve 102 is located at the end of the third control valve 101 away from the connection position between the first drain pipeline 100 and the first sub-pipeline 50. The first drain pipeline 100 is provided to discharge condensed water between the heat exchanger 40 and the liquid intake valve 30 and in the first sub-pipeline 50. The second drain pipeline 105 is provided with a fourth control valve 103 and a second drain valve 104. The second drain pipeline 105 is connected to the second sub-pipeline 60. The second drain valve 104 is located at the end of the fourth control valve 103 away from the connection position between the second drain pipeline 105 and the second sub-pipeline 60. The condensed water between the heat exchanger 40 and the first water inlet end 21a and in the second sub-pipeline 60 is discharged through the second drain pipeline 105.

[0102] The first steam trap 102 and the second steam trap 104 can discharge condensed water generated by cooling and condensing steam during its flow, while preventing steam from leaking from the first sub-pipeline 50 , the second sub-pipeline 60 and the branch pipe 20 .

[0103] In this way, by setting up the combination of the first hydrophobic pipe 100 and the second hydrophobic pipe 105, the condensed water in the first sub-pipeline 50, the second sub-pipeline 60 and the branch pipe 20 can be discharged, which is beneficial to reducing the heat absorbed by the condensed water, and is beneficial to increasing the temperature of the pipeline when steam is passed into it, thereby helping to improve the sterilization effect.

[0104] In some specific embodiments of the present application, the third control valve 101 is a pneumatic ball valve.

[0105] In some specific embodiments of the present application, the fourth control valve 103 is a pneumatic ball valve.

[0106] In some embodiments, please refer to Figure 1 The water outlet of the second hydrophobic pipe 105 is connected to the first hydrophobic pipe 100. In this way, the water in the second hydrophobic pipe 105 can be discharged through the first hydrophobic pipe 100, which is beneficial to reduce costs and facilitate microbial control.

[0107] In some embodiments, please refer to Figure 1 The water outlet of the second sub-pipeline 60 is connected to the first sub-pipeline 50. In this way, the water in the second sub-pipeline 60 can be discharged through the first sub-pipeline 50, which is beneficial to reducing costs and facilitating microbial control.

[0108] In some embodiments, the first sub-pipeline 50 is provided with a third sub-pipeline valve 54, and the second sub-pipeline 60 is provided with a fourth sub-pipeline valve 63. This helps to reduce the probability of backflow of the injection water.

[0109] In some specific embodiments of the present application, the third sub-path valve 54 is a pneumatic ball valve.

[0110] In some specific embodiments of the present application, the fourth sub-path valve 63 is a pneumatic ball valve.

[0111] The cold spot cooling system in the above embodiment, see Figure 1In the high-temperature operating state, the water in the main line 10 has a first temperature, the main line 10 is not connected to the branch line 20, and the injection water in the main line 10 flows directly to the first water outlet 12a without flowing into the branch line 20. During the cold spot cooling stage, the main line 10 is connected to the branch line 20, and the injection water at the first temperature flows into the branch line 20, and the injection water flows into the cooling line of the heat exchanger 40 for heat exchange. The heat exchanger 40 includes a cooling line 41, and a first temperature detection component 52 and a regulating valve are arranged on the cooling line 41. The flow rate of the cooling fluid in the cooling line 41 is controlled by the cooperation of the first temperature detection component 52 and the regulating valve, thereby controlling the temperature of the injection water flowing out of the cooling line. When the injection water does not reach the second temperature, the liquid extraction valve 30 is closed and the first sub-way valve 53 is opened. The injection water that has not reached the second temperature flows from the branch line 20 into the first sub-way valve 53. When the temperature of the injection water reaches the second temperature, the first sub-way valve 53 is closed, and the liquid extraction valve 30 is opened to supply injection water with the second temperature suitable for the cold spot. When the cold spot is finished, the liquid extraction valve 30 is closed, the branch line 20 is disconnected from the main line 10, and the first sub-line valve 53 and the second sub-line valve 62 are opened. The injection water in the branch line 20 can flow into the first sub-line 50 and the second sub-line 60 and flow out of the cold spot cooling system. After the injection water in the branch line 20 is drained, the steam line valve 81 and the second control valve 71 are opened, and the clean line valve 91 is closed. The branch line 20 is disconnected from the main line 10. Steam is introduced from the steam line 80 to the branch line 20, the first sub-line 50, the second sub-line 60, the second connecting line 70, the first drain line 100, and the second drain line 105 for sterilization through the liquid extraction valve 30, the first sub-line 50, the second sub-line 60, the second connecting line 70, the first drain line 100, and the second drain line 105 for sterilization. The steam temperature in the line is detected by the second temperature detection element provided in the first sub-line 50, so that the time of steam introduction can be conveniently controlled by temperature detection. The first drain line 100 and the second drain line 105 discharge the condensed water in the branch line 20, the first sub-line 50, and the second sub-line 60 through the first drain valve 102 and the second drain valve 104 to maintain the temperature in the line. After sterilization is complete, the steam line valve 81 is closed, the clean line valve 91 is opened, and clean air is introduced from the clean line 90 into the branch line 20, the first sub-line 50, the second sub-line 60, the second connecting line 70, the first drain line 100, and the second drain line 105 for purging. After the purging is complete, the clean line valve 91 is closed. It is understood that during the cold spot cooling stage, the second control valve 71, the third control valve 101, and the fourth control valve 103 are closed. It should be noted that before the cold spot cooling system enters the cold spot cooling state, the second control valve 71 can also be opened, and then the steam line valve 81 and the clean line valve 91 can be opened in sequence to perform sterilization and purging.

[0112] It should be noted that Figure 1The arrows marked on the middle pipeline indicate the flow directions of injection water, steam and clean gas in some embodiments of the present application.

[0113] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0114] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A cold spot cooling system, characterized in that: The cold spot cooling system comprises: Main road; a branch pipe, the branch pipe comprising a first water inlet end and a first water outlet end, the first water inlet end being selectively connected to the main pipe; A liquid extraction valve is provided on the branch pipe, and the first water outlet is provided between the liquid extraction valve and the first water inlet; a heat exchanger, the heat exchanger being in communication with the branch pipe and being disposed between the first water inlet and the first water outlet; The first sub-pipeline includes a second water inlet end, the second water inlet end is communicated with the first water outlet end, and the first sub-pipeline is provided with a first sub-pipeline valve.

2. The cold spot cooling system according to claim 1, characterized in that: The cold spot cooling system has a high temperature operation state and a cold spot cooling state, the main line has a water inlet, a first water outlet and a second water outlet both connected to the water inlet, and the second water outlet is connected to the first water inlet; In the high-temperature operating state, the injection water flows to the first water outlet through the water inlet; In the cold spot cooling state, the injection water flows in through the water inlet and flows from the second water outlet to the first water inlet end.

3. The cold spot cooling system according to claim 2, characterized in that: The heat exchanger comprises: Cooling pipeline for conveying cooling fluid; A cooling pipeline, used for conveying water for injection, the cooling pipeline being in communication with the branch pipeline, and heat exchange between the cooling fluid and the water for injection being possible through the cooling pipeline and the cooling pipeline; a first temperature detecting member, provided at the end of the cooling pipeline where the injection water flows out, for detecting the temperature of the end of the cooling pipeline where the injection water flows out; a regulating valve capable of regulating the flow of the cooling fluid in the cooling pipeline, the regulating valve being provided in the cooling pipeline and electrically connected to the first temperature detecting element; In the cold spot cooling state, the regulating valve can adjust the flow rate of the cooling fluid in the cooling pipeline according to the fluid temperature of the cooling water outlet detected by the first temperature detecting component.

4. The cold spot cooling system according to claim 3, characterized in that: A cooling valve is provided on one side of the cooling pipeline where the cooling fluid flows in, and the regulating valve is provided on the end of the cooling pipeline where the cooling fluid flows out.

5. The cold spot cooling system according to claim 1, characterized in that: The cold spot cooling system is provided with an interlayer space and a clean space. The interlayer space is provided on the side of the clean space that is away from the direction of gravity along the direction of gravity. The heat exchanger and part of the branch pipeline are provided in the interlayer space. The main pipeline, part of the branch pipeline, the liquid extraction valve and the first sub-pipeline are provided in the clean space.

6. The cold spot cooling system according to claim 5, characterized in that: The cold spot cooling system also includes a second sub-pipeline, which includes a third water inlet end. The third water inlet end is connected to the branch pipe. The connection position between the third water inlet end and the branch pipe is located on the side of the branch pipe away from the heat exchanger between the first water inlet end and the heat exchanger. The second sub-pipeline is provided with a second sub-pipeline valve.

7. The cold spot cooling system according to claim 6, characterized in that: The cold spot cooling system also includes: a second connecting pipe, provided with a second control valve, wherein a first end of the second connecting pipe is connected to the first water inlet end; a steam pipeline for conveying steam, the steam pipeline being provided with a steam pipeline valve, the steam pipeline being connected to the second end of the second connecting pipeline; The clean pipeline is used to transport clean gas. The clean pipeline is provided with a clean pipeline valve. The clean pipeline is connected to the second end of the second connecting pipeline.

8. The cold spot cooling system according to claim 7, characterized in that: The first sub-pipeline is provided with a second temperature detecting component, and the second temperature detecting component is arranged on a side of the first sub-pipeline valve away from the second water inlet end.

9. The cold spot cooling system according to claim 7, characterized in that: The cold spot cooling system also includes: a first drain pipeline, provided with a third control valve and a first drain valve, the first drain pipeline being connected to the first sub-pipeline, the first drain valve being located at an end of the third control valve away from a position where the first drain pipeline is connected to the first sub-pipeline; The second drain pipeline is provided with a fourth control valve and a second drain valve. The second drain pipeline is connected to the second sub-pipeline. The second drain valve is located at one end of the fourth control valve away from the position where the second drain pipeline is connected to the second sub-pipeline.

10. The cold spot cooling system according to claim 1, characterized in that: The cold spot cooling system includes a first sampling valve and a second sampling valve. The first sampling valve is arranged between the heat exchanger and the second water inlet end, and the second sampling valve is arranged at the connection point between the main pipeline and the branch pipeline.

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