Branch water supply system

Abstract

The branch water supply system comprises a circulating pipeline and a branch pipeline, the circulating pipeline is provided with a circulating pump, and the circulating pipeline is provided with a first water outlet; the branch pipeline is provided with a first control valve and a first water inlet, the first water inlet is communicated with the first water outlet, and the branch pipeline is provided with a second water taking valve. According to the circulating pipeline provided by the embodiment of the invention, the circulating pipeline and the branch pipeline are arranged, so that the water use requirement of a use point can be met, the pipeline diameter required by the branch water supply system is reduced, the requirement of the branch water supply system on the performance of the pump is reduced, and the cost of the branch water supply system is reduced.

Description

Technical Field

[0001] This application relates to the field of pharmaceutical technology, and particularly to a branch water supply system. Background Art

[0002] In the pharmaceutical industry, the water used in the drug manufacturing process is generally divided into drinking water, purified water and injection water. The quality of the water in the drug manufacturing process directly affects the quality of the drug product, and the water in the drug manufacturing process needs to meet relevant requirements. In the pharmaceutical industry, the transportation and supply of water are also crucial. Among the various production nodes of drugs, many production nodes require water. If separate water supply pipelines are built for each production node, the total cost of the water supply pipelines will be too high.

[0003] In the related art, a circulating pipeline is used for water supply, and multiple water use points are set on the circulating pipeline to meet the water use requirements. However, if a large number of water use points are set, it is easy to cause a large resistance in the circulating pipeline, resulting in insufficient water supply at the water use points. And using the method of increasing the pipe diameter and replacing the pump with better performance to solve the problem of insufficient water supply at the water use points after setting a large number of water use points will increase the construction cost of the circulating pipeline. Summary of the Invention

[0004] Based on this, the embodiments of this application provide a branch water supply system with a lower cost.

[0005] A branch water supply system, the branch water supply system includes:

[0006] A circulating pipeline, provided with a circulating pump, the circulating pipeline has a first water outlet;

[0007] A branch pipeline, provided with a first control valve, the branch pipeline has a first water inlet, the first water inlet is communicated with the first water outlet, and the branch pipeline is provided with a second water intake valve.

[0008] In some embodiments, the circulating pipeline is provided with a first water intake valve, and the branch water supply system has a circulating state and a branch state;

[0009] In the circulating state, the first control valve is closed;

[0010] In the branch state, the first control valve is opened to communicate the circulating pipeline with the branch pipeline.

[0011] In some embodiments, the branch water supply system further includes a steam pipeline for transporting steam, the steam pipeline is provided with a steam pipeline valve, the steam pipeline has a first outlet, and the first outlet is communicated with the branch pipeline.

[0012] In some embodiments, the branch pipeline has a second water outlet, and the branch pipeline further includes a temperature detector, which is arranged between the second water outlet and the second water intake valve.

[0013] In some embodiments, the branch water supply system further includes a clean pipeline for conveying clean gas. A clean pipeline valve is provided on the clean pipeline, and the clean pipeline is communicated with the steam pipeline and is connected between the first outlet and the steam pipeline valve.

[0014] In some embodiments, the branch water supply system further includes a drain pipeline, which includes a drain valve and a second control valve, and the drain pipeline is communicated with the branch pipeline.

[0015] In some embodiments, the branch water supply system further includes a drainage pipeline provided with a drainage valve, and the drainage pipeline is selectively communicated with the circulation pipeline.

[0016] In some embodiments, a part of the circulation pipeline communicated with the drainage pipeline has a slope.

[0017] In some embodiments, the number of the second water intake valves is two or more, and two or more of the second water intake valves are arranged at intervals along the extension direction of the branch pipeline.

[0018] In some embodiments, a water storage tank is provided on the circulation pipeline.

[0019] By providing the circulation pipeline and the branch pipeline, the circulation pipeline provided by the embodiments of the present application can meet the water use requirements of the use points, which is beneficial to reducing the pipeline diameter required by the branch water supply system, beneficial to reducing the requirements for the performance of the pump in the branch water supply system, and further reducing the cost of the branch water supply system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of a branch water supply system in an embodiment of the present application.

[0021] DESCRIPTION OF THE REFERENCE NUMERALS

[0022] 10. Circulation pipeline; 10a. First water outlet; 11. Circulation pump; 12. First water intake valve; 20. Branch pipeline; 21. First control valve; 22a. First water inlet; 23. Second water intake valve; 24a. Second water outlet; 30. Steam pipeline; 31. Steam pipeline valve; 32a. First outlet; 33. Temperature detector; 50. Clean pipeline; 51. Clean pipeline valve; 60. Drainage pipeline; 61. Drainage valve; 62. Second control valve; 70. Drainage pipeline; 71. Drainage valve; 80. Water storage tank; 81. Water outlet pipeline; 82. Third control valve; 83. First diversion section; 84. Second diversion section; 85. Conductivity sensor; 86. Flowmeter; 87. Pressure gauge; 88. Temperature transmitter. Detailed implementation manners

[0023] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0024] In the description of the present application, it should be understood that if terms such as "length", "width", "thickness", "upper", "lower", "front", "rear", "top", "bottom", "height", "low" appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0025] In addition, if terms such as "first" and "second" appear, these terms are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0026] In this application, unless otherwise clearly specified and defined, if terms such as "installed", "connected", "linked", "fixed", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0027] In this application, unless otherwise clearly specified and defined, if there is a description such as a first feature being "on" or "under" a second feature, its meaning can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over", and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "beneath", and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower horizontal level than the second feature.

[0028] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0029] In the pharmaceutical field, there are relatively high demands for different types of water such as water for injection and purified water. Therefore, it is necessary to design a water supply system for water supply. In actual situations, it is necessary to set up more usage points in the water supply system to meet the water usage requirements. However, if more usage points are set up in the water supply system, it is easy to make the pipes of the water supply system longer, thereby increasing the resistance of the water supply system and making it difficult to meet the water usage requirements of the usage points.

[0030] Therefore, in the related art, the pipe diameter is enlarged to reduce the pipe pressure, and a pump with better performance is used to meet the water usage requirements. However, this will make the construction cost of the water supply system relatively high.

[0031] Based on this, see Figure 1, an embodiment of the present application provides a branch water supply system, which includes a circulation pipeline 10 and a branch pipeline 20. A circulation pump 11 is provided in the circulation pipeline 10 to drive the water in the circulation pipeline 10 to flow continuously through the circulation pump 11, reducing the probability of stagnant water generated in the circulation pipeline 10, and capable of reducing the probability of microbial growth in the circulation pipeline 10, thereby reducing the probability of the water in the circulation pipeline 10 being polluted. At the same time, it can also make the water in the circulation pipeline 10 have a certain pressure. Specifically, the circulation pipeline 10 has a first water outlet 10a. The branch pipeline 20 is provided with a first control valve 21. The branch pipeline 20 has a first water inlet 22a, and the first water inlet 22a is communicated with the first water outlet 10a. The branch pipeline 20 realizes the selectively connection between the branch pipeline 20 and the circulation pipeline 10 through the first control valve 21. The first control valve 21 is opened so that the water in the circulation pipeline 10 enters the branch pipeline 20 from the first water outlet 10a through the first water inlet 22a. The branch pipeline 20 is provided with a second water intake valve 23 to enable water to be supplied to the use point by opening the second water intake valve 23.

[0032] It can be understood that one end of the branch pipeline 20 is connected to the circulation pipeline 10, while the other end of the branch pipeline 20 is not connected to the circulation pipeline 10. That is to say, the branch pipeline 20 forms a one-way water supply flow pipeline, which makes the pressure drop smaller during the process of water flowing from one end of the branch pipeline 20 to the other end. Therefore, the water pressure at each position in the branch pipeline 20 is less different from the water pressure at the first water inlet 22a, which is beneficial to meeting the pressure demand of water supply and thus beneficial to meeting the water use demand of the use point. And by reducing the pressure drop when water flows in the branch pipeline 20, it is beneficial to reduce the required pipe diameter of the branch water supply system, reduce the demand for the pump performance of the branch water supply system, and thus reduce the cost of the branch water supply system.

[0033] It should be noted that the use point refers to the point with water use demand, and the water use point connected to the second water intake valve 23 is the use point.

[0034] The circulation pipeline 10 provided by the embodiment of the present application can meet the water use demand of the use point by setting the circulation pipeline 10 and the branch pipeline 20, which is beneficial to reducing the required pipe diameter of the branch water supply system, beneficial to reducing the demand for the pump performance of the branch water supply system, and thus reducing the cost of the branch water supply system.

[0035] It can be understood that the water in the circulation pipeline 10 flows in one direction as a whole in the circulation pipeline 10, such as clockwise or counterclockwise, to form a cycle.

[0036] Specifically, the number of the second water intake valves 23 on the branch pipeline 20 is one. In this way, since there is only one use point, it is easier to meet the water use demand of the use point and the pressure demand of the water use at the use point.

[0037] In some specific embodiments of the present application, the number of the second water intake valves 23 is two or more, and the two or more second water intake valves 23 are arranged at intervals along the extending direction of the branch pipeline 20. It can be understood that since the pressure drop of water in the branch pipeline 20 is relatively small, it is beneficial to set two or more second water intake valves 23 to meet the water use requirements of two or more use points.

[0038] It can be understood that since the pressure drop of water in the branch pipeline 20 is relatively small, it is convenient to add a second water intake valve 23 on the branch pipeline 20 to meet the demand for increasing use points.

[0039] In some embodiments, referring to Figure 1 , a first water intake valve 12 is provided on the circulating pipeline 10, and the branch water supply system has a circulating state and a branch state. In the circulating state, the first control valve 21 is closed, and water flows in the circulating pipeline 10. It can be understood that by setting the first water intake valve 12, water can be directly taken from the circulating pipeline 10, so as to meet the water volume demand when the water consumption is small, which is beneficial to making full use of the circulating pipeline 10 and thus reducing costs. In the branch state, the first control valve 21 is opened to connect the circulating pipeline 10 and the branch pipeline 20, and water enters the branch pipeline 20 from the first water outlet 10a in the circulating pipeline 10 and is supplied to the use points connected to the second water intake valve 23 for use.

[0040] It should be noted that the number of the first water intake valves 12 provided on the circulating pipeline 10 is small to reduce the pressure drop generated by water in the circulating pipeline 10, and thus reduce the influence on the water pressure in the branch pipeline 20.

[0041] In this way, by setting the first water intake valve 12 on the circulating pipeline 10 and setting the circulating state and the branch state, it is convenient to meet the water use requirements when the water consumption is small, and it is also convenient to meet the water use requirements of the use points at different positions, which is beneficial to saving the construction cost of the branch pipeline 20.

[0042] In some embodiments, the branch water supply system further includes a steam pipeline 30. The steam pipeline 30 is used to transport steam. The steam pipeline 30 can transport high-temperature steam for sterilization. A steam pipeline valve 31 is provided on the steam pipeline 30. The steam pipeline 30 has a first outlet 32a, and the first outlet 32a is connected to the branch pipeline 20. Whether the steam pipeline 30 is connected to the branch pipeline 20 is controlled by the steam pipeline valve 31.

[0043] When the use point finishes using water, close the second water intake valve 23, close the first control valve 21, disconnect the branch pipeline 20 from the circulating pipeline 10, stop the water from flowing from the circulating pipeline 10 into the branch pipeline 20, open the steam pipeline valve 31, and introduce high-temperature steam into the branch pipeline 20 through the first outlet 32a to discharge the water in the branch pipeline 20 and sterilize the branch pipeline 20.

[0044] In this way, it is beneficial to kill the microorganisms in the branch pipeline 20, reduce the probability of generating microorganisms in the branch pipeline 20, and further reduce the probability of water being contaminated by microorganisms.

[0045] In some specific embodiments of the present application, the branch pipeline 20 has a second water outlet 24a, so that the branch pipeline 20 can discharge water, steam, etc. through the second water outlet 24a. The branch pipeline 20 further includes a temperature detection element 33, and the temperature detection element 33 is arranged between the second water outlet 24a and the second water intake valve 23. In this way, the temperature detection element 33 can detect the temperature of the steam introduced into the branch pipeline 20, and then it is convenient to determine whether the temperature of the steam introduced into the branch pipeline 20 meets the standard, and the time for introducing the steam can be adjusted according to the temperature of the steam, which is beneficial to improving the sterilization effect, further reducing the probability of generating microorganisms in the branch pipeline 20, and further reducing the probability of the water in the branch pipeline 20 being contaminated.

[0046] It should be noted that when two or more second water intake valves 23 are provided along the extension direction of the branch pipeline 20, the temperature detection element 33 is located between the second water intake valve 23 closest to the second water outlet 24a along the extension direction of the branch pipeline 20 and the second water outlet 24a.

[0047] In some embodiments, the branch water supply system further includes a clean pipeline 50 for transporting clean gas. The clean pipeline 50 is provided with a clean pipeline valve 51. The clean pipeline 50 is connected to the steam pipeline 30, and the clean pipeline 50 is connected between the first outlet 32a and the steam pipeline valve 31. It can be understood that the clean pipeline 50 is selectively connected to the steam pipeline 30, and then selectively connected to the branch pipeline 20. Whether the clean pipeline 50 is connected to the steam pipeline 30 is controlled by the clean pipeline valve 51.

[0048] When the steam pipeline 30 introduces steam into the branch pipeline 20 and after the sterilization is completed, keep the first control valve 21 closed, close the steam pipeline valve 31, open the clean pipeline valve 51, and introduce clean gas into the branch pipeline 20 through the clean pipeline 50, and blow the branch pipeline 20 with the clean gas to make the branch pipeline 20 dry and clean. In this way, it is beneficial to further reduce the probability of generating microorganisms in the branch pipeline 20 and then contaminating the water in the branch pipeline 20.

[0049] It should be noted that the clean gas refers to the gas after purification and filtration treatment. The clean gas can meet the requirements of the water in the branch water supply system for parameters such as microorganisms, suspended particulate matter, and humidity, so as to reduce the probability of water being contaminated.

[0050] In some embodiments, the branch water supply system further includes a drain pipe 60, which includes a steam trap 61 and a second control valve 62, and the drain pipe 60 is communicated with the branch pipe 20. The steam trap 61 can discharge the condensed water generated by the cooling and condensation of the steam when the steam is introduced into the branch pipe 20, and at the same time, prevent the steam from leaking through the drain pipe 60.

[0051] In this way, by setting the drain pipe 60, the condensed water in the branch pipe 20 can be discharged, which is beneficial to reducing the heat absorbed by the condensed water, beneficial to increasing the temperature in the branch pipe 20 when the steam is introduced, and further beneficial to improving the sterilization effect.

[0052] In some embodiments, the branch water supply system further includes a drain pipe 70, which is provided with a drain valve 71, and the drain pipe 70 is selectively communicated with the circulation pipe 10. It can be understood that it is necessary to clean the circulation pipe 10 to make the pipe clean. Therefore, it is necessary to drain the water in the circulation pipe 10 before cleaning the circulation pipe 10. When the circulation pipe 10 needs to be cleaned, the drain valve 71 is opened to communicate the drain pipe 70 with the circulation pipe 10, so as to facilitate draining the water in the circulation pipe 10 through the drain pipe 70.

[0053] In some specific embodiments of the present application, the branch water supply system further includes a water outlet pipe 81, which is provided with a third control valve 82, and the water outlet pipe 81 is communicated with the second water outlet 24a. In this way, by opening the third control valve 82, it is beneficial to discharge the water, steam, clean gas, etc. in the branch pipe 20 through the water outlet pipe 81.

[0054] In some embodiments, a part of the circulation pipe 10 communicated with the drain pipe 70 has a slope. In this way, by setting a slope for a part of the circulation pipe 10, a height difference in the direction of gravity is generated on both sides of a part of the circulation pipe 10. On the one hand, it is convenient for the water to flow to the drain pipe 70, and on the other hand, it is beneficial to reduce the probability of dead water generated in the pipe.

[0055] In some specific embodiments of the present application, the circulation pipe 10 includes a first diversion section 83 and a second diversion section 84. The first diversion section 83 and the second diversion section 84 respectively have slopes, and the number of the drain pipes 70 is two, and the two drain pipes 70 are respectively communicated with the first diversion section 83 and the second diversion section 84.

[0056] One drain pipe 70 is communicated with the water outlet end of the first diversion section 83, that is, the lower end of the first diversion section 83, so that it is beneficial for the water in the first diversion section 83 to flow to the drain pipe 70 communicated with the first diversion section 83; the other drain pipe 70 is communicated with the water inlet end of the second diversion section 84, that is, the higher end of the second diversion section 84, so that it is beneficial to reduce the probability of dead water generated at the connection between the drain pipe 70 and the second diversion section 84.

[0057] Specifically, the slope of the first diversion section 83 is 1%, and the slope of the second diversion section 84 is 1%.

[0058] In some embodiments, the circulation pipeline 10 is provided with a water storage tank 80. Thus, by arranging the water storage tank 80 in the circulation pipeline 10, a certain amount of water can be stored, and further, the water use requirements of a large number of use points within a short time can be met, which is beneficial to improving the stability of the water flow in the circulation pipeline 10 and the branch pipeline 20.

[0059] In addition, in some other embodiments, the circulation pipeline 10 is provided with a conductivity sensor 85, so that the conductivity of the water in the circulation pipeline 10 can be detected, and further, it is beneficial to detect the water quality of the water in the circulation pipeline 10. In addition, in some specific embodiments of the present application, the circulation pipeline 10 is further provided with a flowmeter 86 to monitor the flow rate in the circulation pipeline 10.

[0060] In still some other embodiments, the circulation pipeline 10 is provided with a pressure gauge 87 to monitor the water pressure in the circulation pipeline 10. At the same time, the circulation pipeline 10 is further provided with a temperature transmitter 88 to monitor the water temperature in the circulation pipeline 10.

[0061] During the working process, refer to Figure 1, when there is no water supply demand at the usage point, that is, when the branch water supply system does not need to supply water, the first control valve 21 is closed, and water is driven by the circulation pump 11 to flow in the circulation pipeline 10, and the branch water supply system is in a circulating state. When the branch water supply system is in a circulating state and there is a small water demand at the usage point, the first water intake valve 12 is opened to meet the water demand at the usage point. When there is a large water demand at the usage point, the branch water supply system switches to the branch state, and the first control valve 21 is opened to allow water to flow into the branch pipeline 20. At this time, by opening the second water intake valve 23 on the branch pipeline 20, water can be supplied to the usage point. By providing two or more second water intake valves 23 on the branch pipeline 10, a large water demand can be met. By providing a water storage tank 80 on the circulation pipeline 10, the stability of the water flow in the circulation pipeline 10 and the branch pipeline 20 can be improved when supplying water to the usage point. When the water demand at the usage point is met, the first control valve 21 is closed, and the steam pipeline valve 31 is opened. High-temperature steam is introduced into the branch pipeline 10 from the steam pipeline 30 to sterilize the branch pipeline 10. The temperature detection element 33 provided on the branch pipeline 10 is used to detect the steam temperature in the branch pipeline 10 to determine the time when the temperature in the branch pipeline 10 meets the requirements. At the same time, the second control valve 62 is opened to discharge the condensed water generated when the steam is introduced through the steam trap 61. When the steam sterilization is completed, the first control valve 21 is kept closed, the steam pipeline valve 31 is closed, and the steam supply to the branch pipeline 10 is stopped. The clean pipeline valve 51 is opened, and clean gas is introduced into the branch pipeline 10 from the clean pipeline 50 to purge the branch pipeline 10. When the purging is completed, the clean pipeline valve 51 is closed, and the branch pipeline 10 is sterilized and cleaned and can be opened at any time by opening the first control valve 21 for use. When the circulation pipeline 10 needs to be cleaned, the drain valve 71 is opened, and the first control valve 21 is closed to allow water to flow into the drain pipeline 70 to drain all the water in the circulation pipeline 10. By making the part connected to the drain pipeline 70 have a slope, it is convenient to drain the water in the circulation pipeline 10.

[0062] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0063] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A branch water supply system, characterized in that, The branch water supply system includes: A circulation pipeline, provided with a circulation pump, and the circulation pipeline has a first water outlet; A branch pipeline, provided with a first control valve, the branch pipeline has a first water inlet, the first water inlet is communicated with the first water outlet, and the branch pipeline is provided with a second water intake valve.

2. The branch water supply system according to claim 1, characterized in that, The circulation pipeline is provided with a first water intake valve, and the branch water supply system has a circulation state and a branch state; In the circulation state, the first control valve is closed; In the branch state, the first control valve is opened to communicate the circulation pipeline with the branch pipeline.

3. The branch water supply system according to claim 1, characterized in that, The branch water supply system further includes a steam pipeline for conveying steam, the steam pipeline is provided with a steam pipeline valve, the steam pipeline has a first outlet, and the first outlet is communicated with the branch pipeline.

4. The branch water supply system according to claim 3, characterized in that, The branch pipeline has a second water outlet, and the branch pipeline further includes a temperature detection member, and the temperature detection member is arranged between the second water outlet and the second water intake valve.

5. The branch water supply system according to claim 3, characterized in that, The branch water supply system further includes a clean pipeline for conveying clean gas, the clean pipeline is provided with a clean pipeline valve, the clean pipeline is communicated with the steam pipeline, and the clean pipeline is communicated between the first outlet and the steam pipeline valve.

6. The branch water supply system according to claim 3, characterized in that, The branch water supply system further includes a drain pipeline, the drain pipeline includes a drain valve and a second control valve, and the drain pipeline is communicated with the branch pipeline.

7. The branch water supply system according to claim 1, characterized in that, The branch water supply system further includes a drainage pipeline, the drainage pipeline is provided with a drainage valve, and the drainage pipeline is selectively communicated with the circulation pipeline.

8. The branch water supply system according to claim 7, wherein, A part of the circulation pipeline communicated with the drainage pipeline has a slope.

9. The branch water supply system according to claim 1, characterized in that, The number of the second water intake valves is two or more, and two or more of the second water intake valves are arranged at intervals along the extending direction of the branch pipeline.

10. The branch water supply system according to claim 1, characterized in that, The circulation pipeline is provided with a water storage tank.

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