Cold spot cooling device, water for injection system, and cold spot cooling method

Abstract

The application provides a cold spot cooling device, water for injection system and cold spot cooling method, comprising a heat exchanger, a temperature detection element, a driving pump, a first control valve, a second control valve, a flow detection element and a third control valve. The cold spot cooling device in the application can selectively open the second control valve and close the third control valve or close the second control valve and open the third control valve according to the actual use requirement, so that the water for injection can sequentially pass through the first channel of the heat exchanger, the driving pump, one end of the first control valve and the second control valve and flow out from the water outlet end of the main pipeline at the first preset temperature or the second preset temperature, ensuring that there is no blind pipe in the cold spot cooling device, and the flow rate of the water for injection in the cold spot cooling device is adjusted through the driving pump, ensuring the controllability of the microbial indicators in the water for injection in the cold spot cooling device, and improving the quality of the water for injection at the use point.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of water for injection, in particular to a cold point cooling device, a water for injection system and a cold point cooling method. BACKGROUND

[0002] Water for injection is the highest quality process material in the production process of pharmaceutical products, which is widely used in the pharmaceutical industry, participating in the cleaning of instruments, liquid preparation, product preparation and other processes in the pharmaceutical process. The quality of water for injection is a key factor affecting product quality. At present, the water for injection in the pharmaceutical factory is mostly kept at 70 DEG C or above, and the flow rate of the water for injection meets the backwater flow rate required by the regulations, so as to ensure the controllability of the microbial indicators in the water for injection system and the quality of the water for injection at the use point. In the traditional water for injection system, the process requirement of the use point is mostly normal temperature water for injection, so a cooling water heat exchanger is needed to be configured at the use point. However, the cooling water heat exchanger has a blind pipe, and the flow rate of the water for injection in the cooling water heat exchanger does not meet the requirement of the backwater flow rate, so that the quality of the water for injection at the use point is low. SUMMARY

[0003] Therefore, it is necessary to provide a cold point cooling device, a water for injection system and a cold point cooling method for solving the problem of low quality of water for injection at the use point in the traditional water for injection system.

[0004] The technical scheme is as follows:

[0005] On the one hand, a cold point cooling device is provided, comprising:

[0006] a heat exchanger, the heat exchanger is provided with a first channel for conveying water for injection and a second channel for conveying cooling fluid, so that the water for injection in the first channel can exchange heat with the cooling fluid in the second channel, one end of the first channel is used for communicating with a main pipeline;

[0007] a temperature detection element, the temperature detection element is arranged at the other end of the first channel, so as to detect the temperature of the water for injection at the other end of the first channel;

[0008] a drive pump, the input end of the drive pump communicates with the other end of the first channel;

[0009] a first control valve, one end of the first control valve communicates with the output end of the drive pump;

[0010] a second control valve, one end of the second control valve communicates with one end of the first control valve, the other end of the second control valve is used for communicating with the main pipeline;

[0011] A flow detection element is arranged at one end of the second control valve to detect the flow of the water for injection at the one end of the second control valve.

[0012] A third control valve is arranged in communication with the one end of the second control valve and the one end of the first channel.

[0013] The technical solutions are further described as follows:

[0014] In one of the embodiments, the cold point cooling device further comprises a discharge valve, one end of which is in communication with one end of the second control valve.

[0015] In one of the embodiments, one end of the second control valve, one end of the third control valve and one end of the discharge valve are arranged to form a communication cavity, and one end of the first control valve is in communication with the communication cavity.

[0016] In one of the embodiments, the cold point cooling device further comprises a controller, which is in communication connection with the driving pump and the flow detection element.

[0017] In one of the embodiments, the controller is in communication connection with the second control valve, the third control valve and the discharge valve.

[0018] In one of the embodiments, the cold point cooling device further comprises a first branch pipeline, two ends of which are in communication with the other end of the first channel and one end of the second control valve, respectively, and the temperature detection element, the driving pump, one end of the first control valve and the flow detection element are arranged on the first branch pipeline in sequence.

[0019] In one of the embodiments, the first control valve is at least two, and one end of each of the first control valves is arranged between the driving pump and the flow detection element.

[0020] In one of the embodiments, the cold point cooling device further comprises a sampling valve, which is in communication with the first control valve.

[0021] In one of the embodiments, the cold point cooling device further comprises a check valve, one end of which is in communication with one end of the first channel, and the other end of which is arranged to be in communication with the main pipeline.

[0022] On the other hand, the application provides an injection water system, which is characterized in that it comprises a main pipeline and the cold point cooling device, and the main pipeline is in communication with the cold point cooling device.

[0023] In yet another aspect, a cold spot cooling method is provided, which is applied to the cold spot cooling device, and characterized in that the method comprises:

[0024] After the second control valve is opened and the first control valve and the third control valve are closed, the injection water at the first preset temperature is delivered to the water inlet end of the main pipeline, and the pump is driven to work, so that the injection water can pass through the heat exchanger, the driven pump, one end of the first control valve and the second control valve in sequence at the first preset temperature and the preset flow rate, and flow out from the water outlet end of the main pipeline.

[0025] When the use point has a low-temperature injection water demand, the third control valve is opened, the second control valve is closed, and the heat exchanger works, so that the injection water in the first channel can exchange heat with the cooling fluid in the second channel to reduce the temperature of the injection water at one end of the first control valve, and the injection water at one end of the second control valve can be delivered to one end of the first channel.

[0026] When the temperature of the injection water at one end of the first control valve decreases from the first preset temperature to the second preset temperature, the first control valve is opened, so that the injection water at one end of the first control valve can flow out from the other end of the first control valve at the second preset temperature.

[0027] The cold spot cooling device, the water for injection system and the cold spot cooling method in the above embodiments can achieve the following effects. When there is no demand for water for injection, the second control valve is opened, the first control valve and the third control valve are closed, the water for injection at the first preset temperature is delivered to the water inlet end of the main pipeline, and the pump is driven to work, and the heat exchanger does not work, so that the water for injection can sequentially pass through the first channel of the heat exchanger, the driven pump, one end of the first control valve and one end of the second control valve and flow out from the water outlet end of the main pipeline at the first preset temperature and the preset flow rate, and meanwhile, the flow of the water for injection at one end of the second control valve is detected by the flow detection element, so that there is no blind pipe in the cold spot cooling device, and the flow rate of the water for injection in the cold spot cooling device meets the requirement of the backwater flow rate, and the controllability of the microbial indicators in the water for injection in the cold spot cooling device is ensured, and the quality of the water for injection at the use point is improved. When there is a demand for low-temperature water for injection at the use point, the third control valve is opened, the second control valve is closed, and the heat exchanger works, so that the water for injection in the first channel can exchange heat with the cooling fluid in the second channel to reduce the temperature of the water for injection at one end of the first control valve, and the water for injection flowing to one end of the second control valve can be delivered to one end of the first channel and cannot flow back to the main pipeline, and thus the cooled water for injection can circulate in the circulating flow path in the cold spot cooling device, so that the consumption of the cooling fluid is saved, and meanwhile, the cooled water for injection can avoid affecting the temperature of the water for injection in the main pipeline, and the quality of the water for injection in the main pipeline is ensured. When the temperature detection element detects that the temperature of the water for injection at one end of the first control valve decreases from the first preset temperature to the second preset temperature, the first control valve is opened, so that the water for injection at one end of the first control valve can flow out from the other end of the first control valve at the second preset temperature, thereby meeting the demand for low-temperature water for injection at the use point, and the cold spot cooling device and the water for injection system are convenient to install and maintain. BRIEF DESCRIPTION OF DRAWINGS

[0028] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification. The drawings illustrate one or more embodiments of the present application and, together with the description, serve to explain the principles of the present application.

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the accompanying drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the accompanying drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0030] Figure 1 FIG. 1 is a structural schematic diagram of a cold spot cooling device according to an embodiment of the present application;

[0031] Figure 2 FIG. 2 is a flowchart of a cooling method of a water for injection system according to an embodiment of the present application.

[0032] Explanation of reference numerals in the attached figures:

[0033] 10. Cold spot cooling device; 100. Heat exchanger; 200. Temperature detection element; 300. Drive pump; 400. First control valve; 500. Second control valve; 600. Flow detection element; 700. Third control valve; 800. Main pipeline; 900. Discharge valve; 1000. Regulating valve; 1100. First branch pipeline; 1200. Sampling valve; 1300. Check valve; 1400. Second branch pipeline. Detailed Implementation

[0034] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0035] like Figure 1 As shown, in one embodiment, a cold point cooling device 10 is provided, including a heat exchanger 100, a temperature sensing element 200, a drive pump 300, a first control valve 400, a second control valve 500, a flow sensing element 600, and a third control valve 700. The heat exchanger 100 has a first channel for conveying water for injection and a second channel for conveying cooling fluid, allowing heat exchange between the water for injection in the first channel and the cooling fluid in the second channel. One end of the first channel is connected to a main pipeline 800. The temperature sensing element 200 is located at the other end of the first channel to detect the temperature of the water for injection at that end. The input end of the drive pump 300 is connected to the other end of the first channel. One end of the first control valve 400 is connected to the output end of the drive pump 300. One end of the second control valve 500 is connected to one end of the first control valve 400, and the other end of the second control valve 500 is connected to the main pipeline 800. A flow detection element 600 is disposed at one end of the second control valve 500 to detect the flow rate of the water for injection at one end of the second control valve 500. One end of the third control valve 700 is connected to one end of the second control valve 500, and the other end of the third control valve 700 is connected to one end of the first channel.

[0036] The cold spot cooling device 10 in the above embodiment, when there is no water for injection demand, opens the second control valve 500, closes the first control valve 400 and the third control valve 700, and sends the water for injection at the first preset temperature to the water inlet end of the main pipeline 800, and drives the pump 300 to work, and the heat exchanger 100 does not work, so that the water for injection can pass through the first channel of the heat exchanger 100, the driven pump 300, one end of the first control valve 400 and one end of the second control valve 500 in sequence at the first preset temperature and the preset flow rate, and flow out from the water outlet end of the main pipeline 800, and at the same time, the flow of the water for injection at one end of the second control valve 500 is detected by the flow detection element 600, so as to ensure that there is no blind pipe in the cold spot cooling device 10, and the flow rate of the water for injection in the cold spot cooling device 10 meets the backwater flow rate requirement, thereby ensuring the controllability of the microbial indicators in the water for injection in the cold spot cooling device 10, and improving the quality of the water for injection at the use point. When there is a low-temperature water for injection demand at the use point, the third control valve 700 is opened, the second control valve 500 is closed, and the heat exchanger 100 works, so that the water for injection in the first channel can be heat-exchanged with the cooling fluid in the second channel to reduce the temperature of the water for injection at one end of the first control valve 400, and the water for injection flowing to one end of the second control valve 500 can be sent to one end of the first channel and cannot flow back to the main pipeline 800, thereby enabling the cooled water for injection to circulate in the cold spot cooling device 10, thereby saving the consumption of cooling fluid, and avoiding the influence of the cooled water for injection on the temperature of the water for injection in the main pipeline 800, and ensuring the quality of the water for injection in the main pipeline 800. When the temperature detection element 200 detects that the temperature of the water for injection at one end of the first control valve 400 decreases from the first preset temperature to the second preset temperature, the first control valve 400 is opened, so that the water for injection at one end of the first control valve 400 can flow out from the other end of the first control valve 400 at the second preset temperature, thereby meeting the low-temperature water for injection demand at the use point, and the cold spot cooling device 10 is easy to install and maintain.

[0037] The cooling fluid can be cooling water, cooling air or other cooled fluid.

[0038] The temperature detection element 200 can be a temperature transmitter, a temperature sensor or other element capable of detecting temperature. The value range of the first preset temperature and the value range of the second preset temperature can be flexibly adjusted according to actual needs. In the embodiment, the value range of the first preset temperature is greater than 80℃, and the value range of the second preset temperature is less than 35℃.

[0039] The flow detection element 600 can be a flow variator, a flow sensor or other element capable of detecting flow. In the present embodiment, the flow rate of the injection water at one end of the second control valve 500 is determined by detecting the flow of the injection water at one end of the second control valve 500 by the flow detection element 600, i.e. the flow of the injection water at one end of the second control valve 500 is linearly related to the flow rate of the injection water at one end of the second control valve 500, and therefore there is a preset flow corresponding to a preset flow rate at one end of the second control valve 500. In other embodiments, the flow rate of the injection water at one end of the second control valve 500 can be directly detected.

[0040] The value range of the preset flow rate can be flexibly adjusted according to actual needs. In the present embodiment, the value range of the preset flow rate is greater than 0.9 m / s and less than 1.2 m / s.

[0041] In the present embodiment, the driving pump 300 can be a booster pump, and the first control valve 400, the second control valve 500 and the third control valve 700 can all be backwater diaphragm valves. When there is a demand for low-temperature injection water at the use point, the first control valve 400 is opened on the premise that the result detected by the temperature detection element 200 is less than the second preset temperature and the detection result of the flow detection element 600 is greater than the preset flow.

[0042] As shown in FIG. 4, the temperature detection element 200 is arranged on the injection water pipeline 100, and the flow detection element 600 is arranged on the injection water pipeline 100. Figure 1As shown, further, the cold spot cooling device 10 also includes a discharge valve 900, one end of which is in communication with one end of the second control valve 500. In this way, when the first control valve 400 is open, the injection water is diverted from one end of the first control valve 400, so that the flow of injection water at one end of the second control valve 500 is reduced, and in turn, the injection water at one end of the second control valve 500 is at risk of being contaminated by microorganisms due to the flow rate being lower than the preset flow rate, so that it is necessary to determine whether the injection water at one end of the second control valve 500 needs to be discharged through the detection result of the flow detection element 600, that is, when the detection result of the flow detection element 600 is less than the preset flow, the discharge valve 900 is opened, and the second control valve 500 and the third control valve 700 are closed, so that the injection water at one end of the second control valve 500 can be discharged through the discharge valve 900, ensuring that the injection water in the cold spot cooling device 10 will not be contaminated by microorganisms due to the flow rate being lower than the preset flow rate, further improving the quality of the injection water at the use point. At the same time, when the detection result of the flow detection element 600 is less than the preset flow, the pump 300 is driven to increase the frequency, so that the flow rate of the injection water at one end of the second control valve 500 increases, and in turn, when the flow at one end of the second control valve 500 reaches the requirement of the preset flow, the third control valve 700 is opened, and the sampling valve 1200 is closed, so that the injection water at one end of the second control valve 500 can circulate in the cold spot cooling device 10, improving the utilization rate of the injection water while also ensuring the quality of the injection water at the use point. In addition, when the first control valve 400 is closed, the injection water at one end of the first control valve 400 flows to one end of the second control valve 500 to increase the flow at one end of the second control valve 500, the pump 300 is driven to decrease the frequency, so that the flow at one end of the second control valve 500 decreases to the preset flow, reducing the energy consumption of the pump 300.

[0043] Optionally, one end of the second control valve 500, one end of the third control valve 700, and one end of the discharge valve 900 can cooperate to form a communication cavity, and one end of the first control valve 400 is in communication with the communication cavity. In this way, the second control valve 500, the third control valve 700, and the discharge valve 900 share one communication cavity, avoiding the connection position between the second control valve 500, the third control valve 700, and the discharge valve 900 from forming a dead angle, effectively reducing the risk of microorganisms breeding at the connection position between the second control valve 500, the third control valve 700, and the discharge valve 900, and improving the quality of the injection water at the use point.

[0044] Specifically in this embodiment, the second control valve 500, the third control valve 700, and the discharge valve 900 are integrally formed by casting. In this way, the connection position between the second control valve 500, the third control valve 700, and the discharge valve 900 is guaranteed to be hygienic and zero dead angle.

[0045] In one embodiment, the cold spot cooling device 10 further comprises a controller, which is in communication with the driving pump 300 and the flow detection element 600. In this way, feedback regulation can be formed between the driving pump 300 and the flow detection element 600, so as to ensure that the flow of the injection water at one end of the second control valve 500 meets the preset flow requirement. That is, when the detection result of the flow detection element 600 is less than the preset flow, the flow detection element 600 feeds back the detection result to the controller, so that the controller can control the driving pump 300 to increase the frequency, so as to increase the flow of the injection water at one end of the second control valve 500 to the preset flow, so as to ensure that the injection water will not be contaminated by microorganisms due to the flow rate being lower than the preset flow rate. When the detection result of the flow detection element 600 is greater than the preset flow, the flow detection element 600 feeds back the detection result to the controller, so that the controller can control the driving pump 300 to decrease the frequency, so as to decrease the flow of the injection water at one end of the second control valve 500 to the preset flow, thereby saving the energy consumption of the driving pump 300.

[0046] The controller can be a single-chip microcomputer, a programmable logic controller or other control structure. The controller is in communication with the driving pump 300 and the flow detection element 600, and can be connected by wires, data lines, Bluetooth, wireless communication network technology or other communication methods.

[0047] Further, the controller is in communication with the second control valve 500, the third control valve 700 and the discharge valve 900. In this way, the controller can control the second control valve 500, the third control valve 700 and the sampling valve 1200 to open or close according to the detection result of the flow detection element 600, thereby improving the intelligent degree of the cold spot cooling device 10.

[0048] In other embodiments, the controller is also in communication with the heat exchanger 100, the temperature detection element 200 and the first control valve 400. In this way, the intelligent degree of the cold spot cooling device 10 is further improved.

[0049] Optionally, the cold spot cooling device 10 further comprises an adjusting valve 1000 in communication with the controller, and the adjusting valve 1000 is in communication with the other end of the second channel. In this way, the controller can control the adjusting valve 1000 according to the detection result of the temperature detection element 200, so that the flow of the cooling fluid in the second channel is adjustable, thereby reducing the consumption of the cooling fluid. Compared with the traditional cooling water heat exchanger 100, the cold spot cooling device 10 in this embodiment can realize instantaneous preparation when there is a demand for low-temperature injection water, without the need for additional disinfection and sterilization of the heat exchanger 100, thereby ensuring the timeliness of the injection water and saving the energy consumption of sterilization.

[0050] As Figure 1As shown in the figure, in one embodiment, the cold spot cooling device 10 further comprises a first branch pipe 1100, two ends of the first branch pipe 1100 are respectively in communication with the other end of the first channel and one end of the second control valve 500, and the temperature detection element 200, the drive pump 300, one end of the first control valve 400, and the flow detection element 600 are sequentially arranged on the first branch pipe 1100. In this way, the convenience of assembling the cold spot cooling device 10 is improved.

[0051] As shown in the figure, Figure 1 Further, the first control valve 400 is at least two, one end of each first control valve 400 is arranged between the drive pump 300 and the flow detection element 600. In this way, multiple use points can share one cold spot cooling device 10, reducing the operating cost of the water for injection system.

[0052] Among them, the number of first control valves 400 can be flexibly adjusted according to actual needs. For example, the number of first control valves 400 is two, three or four, etc. In this embodiment, the cold spot cooling device 10 can be used for small flow and multiple use points at the same time.

[0053] As shown in the figure, Figure 1 Optionally, the cold spot cooling device 10 further comprises a sampling valve 1200, the sampling valve 1200 is in communication with the first control valve 400. In this way, the quality of the offline water for injection of the use point can be detected and monitored regularly through the sampling valve 1200, to ensure the quality of the water for injection of the use point.

[0054] Among them, the number of sampling valves 1200 can be flexibly adjusted according to actual needs. In this embodiment, the number of sampling valves 1200 is the same as the number of first control valves 400, and each sampling valve 1200 is in communication with each first control valve 400.

[0055] As shown in the figure, Figure 1 In one embodiment, the cold spot cooling device 10 further comprises a check valve 1300, one end of the check valve 1300 is in communication with one end of the first channel, and the other end of the check valve 1300 is used to communicate with the main pipe 800. In this way, the check valve 1300 can prevent the water for injection at one end of the first channel from flowing back to the main pipe 800, to ensure that when there is a demand for low-temperature water for injection at the use point, the water for injection in the cold spot cooling device 10 does not affect the temperature of the water for injection in the main pipe 800, and to improve the controllability of the microbial indicators in the water for injection in the main pipe 800.

[0056] As shown in the figure, Figure 1As shown, the cold spot temperature reduction device 10 further comprises a second branch pipeline 1400, one end of the second branch pipeline 1400 is in communication with one end of the first channel, the other end of the second branch pipeline 1400 is used to communicate with the main pipeline 800, the check valve 1300 is correspondingly arranged on the second branch pipeline 1400, and the other end of the third control valve 700 is in communication with the second branch pipeline 1400 between the check valve 1300 and the first channel. In this way, the installation convenience of the cold spot temperature reduction device 10 is improved.

[0057] In one embodiment, a water for injection system is provided, which comprises the main pipeline 800 and the cold spot temperature reduction device 10 in any of the above embodiments, and the main pipeline 800 is in communication with the cold spot temperature reduction device 10.

[0058] In the water for injection system in the above embodiments, after the second control valve 500 is opened, the first control valve 400 and the third control valve 700 are closed, the water for injection with the first preset temperature is delivered to the water inlet end of the main pipeline 800, and the pump 300 is driven to work, and the heat exchanger 100 does not work, so that the water for injection can sequentially pass through the first channel of the heat exchanger 100, the pump 300, one end of the first control valve 400 and the second control valve 500 and flow out from the water outlet end of the main pipeline 800 at the first preset temperature and the preset flow rate, and the flow of the water for injection at one end of the second control valve 500 is detected by the flow detection element 600, so as to ensure that there is no blind pipe in the cold spot temperature reduction device 10, and the flow rate of the water for injection in the cold spot temperature reduction device 10 meets the backwater flow rate requirement, thereby ensuring the controllability of the microbial indicators in the water for injection in the cold spot temperature reduction device 10, and improving the quality of the water for injection at the use point. When there is a low-temperature water for injection demand at the use point, the third control valve 700 is opened, the second control valve 500 is closed, and the heat exchanger 100 works, so that the water for injection in the first channel can exchange heat with the cooling fluid in the second channel to reduce the temperature of the water for injection at one end of the first control valve 400, and the water for injection flowing to one end of the second control valve 500 can be delivered to one end of the first channel and cannot flow back to the main pipeline 800, thereby enabling the cooled water for injection to circulate in the cold spot temperature reduction device 10, thereby saving the consumption of the cooling fluid, avoiding the influence of the cooled water for injection on the temperature of the water for injection in the main pipeline 800, and ensuring the quality of the water for injection in the main pipeline 800. When the temperature detection element 200 detects that the temperature of the water for injection at one end of the first control valve 400 decreases from the first preset temperature to the second preset temperature, the first control valve 400 is opened, so that the water for injection at one end of the first control valve 400 can flow out from the other end of the first control valve 400 at the second preset temperature, thereby meeting the low-temperature water for injection demand at the use point, and the water for injection system is convenient to install and maintain.

[0059] As shown in FIG. 1, the water for injection system comprises a main pipeline 800 and a cold spot temperature reduction device 10. Figure 2As shown, in one embodiment, a cold spot cooling method is provided, applied to the cold spot cooling device 10 in any of the above embodiments, comprising the following steps:

[0060] S100, after opening the second control valve 500 and closing the first control valve 400 and the third control valve 700, the first preset temperature injection water is transported to the water inlet end of the main pipeline 800, and the pump 300 is driven to work, so that the injection water can pass through the heat exchanger 100, the driving pump 300, one end of the first control valve 400 and the second control valve 500 in turn at the first preset temperature and the preset flow rate, and flow out from the water outlet end of the main pipeline 800. In this way, it is ensured that there is no blind pipe in the cold spot cooling device 10, and the flow rate of the injection water in the cold spot cooling device 10 meets the requirement of backwater flow rate, thereby ensuring the controllability of the microbial indicators in the injection water in the cold spot cooling device 10, and improving the quality of the injection water at the use point.

[0061] S200, when the use point has a low-temperature injection water demand, the third control valve 700 is opened, the second control valve 500 is closed, and the heat exchanger 100 is worked, so that the injection water in the first channel can exchange heat with the cooling fluid in the second channel to reduce the temperature of the injection water at one end of the first control valve 400, and the injection water at one end of the second control valve 500 can be transported to one end of the first channel. In this way, the cooled injection water can circulate in the cold spot cooling device 10, saving the consumption of cooling fluid, while avoiding the influence of the cooled injection water on the temperature of the injection water in the main pipeline 800, ensuring the quality of the injection water in the main pipeline 800.

[0062] S300, when the temperature of the injection water at one end of the first control valve 400 is reduced from the first preset temperature to the second preset temperature, the first control valve 400 is opened, so that the injection water at one end of the first control valve 400 can flow out from the other end of the first control valve 400 at the second preset temperature. In this way, the demand for low-temperature injection water at the use point is met, and the installation and maintenance are convenient.

[0063] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. The term "and / or" used in the present application includes any and all combinations of one or more related listed items.

[0064] Furthermore, the terms "first", "second", etc. are used herein only to describe different instances, and do not imply or suggest relative importance or a number of the technical features indicated. Thus, the features defined with "first", "second", etc. can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0065] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0066] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0067] It should be noted that when an element is referred to as "fixed to" or "provided on" another element, it can be directly on the other element or there can be a middle element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not the only implementation.

[0068] It should also be understood that when interpreting the connection relationship or position relationship of the elements, although it is not explicitly described, the connection relationship and position relationship are interpreted to include an error range, which should be within the acceptable deviation range of the specific value determined by the person skilled in the art. For example, "about", "approximately" or "essentially" can mean within one or more standard deviations, without limitation.

[0069] Any combination of the technical features in the above embodiments can be made, and for the sake of brevity, not all possible combinations are described above, however, as long as the combination of the technical features does not exist in contradiction, it shall be considered within the scope of the present disclosure.

[0070] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it shall not be understood as a limitation on the patent scope of the present application. It shall be pointed out that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these shall be within the protection scope of the present application. Therefore, the protection scope of the present application patent shall be subject to the appended claims.

Claims

1. A cold spot cooling method applied to a cold spot cooling device, characterized in that, The cold spot cooling device comprises a heat exchanger, a temperature detection element, a driving pump, a first control valve, a second control valve, a flow detection element, a third control valve and a discharge valve. The heat exchanger is provided with a first channel for conveying injection water and a second channel for conveying cooling fluid, so that the injection water in the first channel can exchange heat with the cooling fluid in the second channel. One end of the first channel is used for communication with the main pipeline. The temperature detection element is arranged at the other end of the first channel to detect the temperature of the injection water at the other end of the first channel. The input end of the driving pump is in communication with the other end of the first channel. One end of the first control valve is in communication with the output end of the driving pump. One end of the second control valve is in communication with one end of the first control valve, and the other end of the second control valve is used for communication with the main pipeline. The flow detection element is arranged at one end of the second control valve to detect the flow of the injection water at one end of the second control valve. One end of the third control valve is in communication with one end of the second control valve, and the other end of the third control valve is in communication with one end of the first channel. One end of the discharge valve is in communication with one end of the second control valve. The cold spot cooling method comprises: After opening the second control valve and closing the first control valve and the third control valve, conveying the injection water at the first preset temperature to the water inlet end of the main pipeline, and driving the pump to work, the heat exchanger does not work, so that the injection water can pass through the heat exchanger, the driving pump, one end of the first control valve and the second control valve in sequence at the first preset temperature and the preset flow rate, and flow out from the water outlet end of the main pipeline; When there is a low-temperature injection water demand at the use point, the third control valve is opened, the second control valve is closed, and the heat exchanger works, so that the injection water in the first channel can exchange heat with the cooling fluid in the second channel to reduce the temperature of the injection water at one end of the first control valve, and the injection water at one end of the second control valve can be conveyed to one end of the first channel and cannot flow back to the main pipeline; When the temperature of the injection water at one end of the first control valve decreases from the first preset temperature to the second preset temperature, the first control valve is opened, so that the injection water at one end of the first control valve can flow out from the other end of the first control valve at the second preset temperature; When the detection result of the flow detection element is less than the preset flow when the first control valve is opened, the discharge valve is opened, the second control valve and the third control valve are closed, so that the injection water at one end of the second control valve is discharged through the discharge valve, and at the same time, the driving pump is frequency-boosted, and when the flow at one end of the second control valve reaches the preset flow, the third control valve is opened and the discharge valve is closed.

2. The cold spot cooling method according to claim 1, characterized by, One end of the second control valve, one end of the third control valve and one end of the discharge valve can cooperate to form a communication cavity, and one end of the first control valve is in communication with the communication cavity.

3. The cold spot cooling method according to claim 2, characterized in that, The cold spot cooling device further comprises a controller in communication connection with the driving pump and the flow detection element.

4. The cold spot cooling method according to any one of claims 1 to 3, characterized in that, The cold spot cooling device further comprises a first branch pipeline, two ends of the first branch pipeline are respectively in communication with the other end of the first channel and one end of the second control valve, and the temperature detection element, the driving pump, one end of the first control valve, and the flow detection element are sequentially arranged on the first branch pipeline.

5. The cold spot cooling method of claim 4, wherein The first control valve is at least two, and one end of each of the first control valves is arranged between the driving pump and the flow detection element.

6. The cold spot cooling method of claim 4, wherein The cold spot cooling device further comprises a sampling valve, and the sampling valve is in communication with the first control valve.

7. The cold spot cooling method according to any one of claims 1 to 3, characterized by, The cold spot cooling device further comprises a check valve, one end of the check valve is in communication with one end of the first channel, and the other end of the check valve is used for being in communication with the main pipeline.

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