Exhaust device, liquid circulation system, liquid injection method and exhaust method

Abstract

The invention discloses an exhaust device, a liquid circulation system, a liquid injection method and an exhaust method.The exhaust device comprises at least one manual exhaust valve arranged at the high position of a pipeline of the liquid circulation system, the outlet end of the manual exhaust valve is connected with a transparent guide pipe in series, and the transparent guide pipe is arranged at the high position of the pipeline of the liquid circulation system; at least part of the transparent guide pipe is higher than the outlet end of the manual exhaust valve; the stop valve is connected to the transparent guide pipe in series; according to the exhaust device, the liquid circulation system, the liquid injection method and the exhaust method, the transparent guide pipe and the stop valve are additionally arranged at the outlet end of the manual exhaust valve, whether gas in a pipeline is completely exhausted or not can be conveniently and visually judged, liquid exhaust waste is reduced, meanwhile, the situation that a user frequently climbs to open and close the manual exhaust valve is avoided, and then user experience is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration equipment, and more specifically, to an exhaust device, a liquid circulation system, a liquid injection method, and an exhaust method. Background Art

[0002] In the existing refrigeration industry, a cold source system using refrigerants such as water and ethylene glycol as the secondary refrigerant is mostly adopted. This system has the characteristics of large refrigeration capacity, large pipeline size, complex structure, and large system volume.

[0003] During normal operation, the device and the pipeline need to be filled with liquid. However, during liquid injection or liquid replenishment, some gas may enter, or after long-term use, the gas dissolved in the liquid may precipitate, resulting in a certain amount of gas in the system. If there is gas in the system, it will cause problems such as pump cavitation, attenuation of heat exchange performance, and corrosion of the device and pipeline. Therefore, exhaust is required during the system commissioning stage or after liquid injection or liquid replenishment.

[0004] The common exhaust method is to set an exhaust valve at the high position or local high position of the device and pipeline. Since the automatic exhaust valve has a small exhaust volume and a slow exhaust speed, a manual exhaust valve is usually set at the position of the automatic exhaust valve at the high position of the system. The manual exhaust valve is used in the stage that requires a large amount of exhaust, such as during initial liquid injection or after maintenance liquid injection. During the normal operation stage, a small amount of gas is discharged from the system through the automatic exhaust valve.

[0005] The manual exhaust valve is generally a small ball valve. During the commissioning stage, liquid is injected from the lowest liquid injection port of the system, and the manual exhaust valves at the high positions are opened in sequence for exhaust. After the system is filled with water, the water pump is operated at a low frequency and the manual exhaust valves at the high positions are opened. With the circulation and buoyancy of the liquid in the system, the gas is brought to the high position and discharged to the outside of the system through the manual exhaust valve.

[0006] However, during manual exhaust, since the pipelines are mostly opaque galvanized steel pipes or stainless steel pipes, it is impossible to directly observe whether the gas in the pipeline is completely discharged. Moreover, during the exhaust process of the manual exhaust valve, the gas often discharges in the form of a gas-liquid mixture. In the existing technology, it is impossible to judge whether the discharged liquid is a gas-liquid mixture containing gas, and it is impossible to intuitively judge whether the gas in the pipeline has been completely discharged. Therefore, during the exhaust process, to ensure that the gas is completely discharged, a large amount of liquid needs to be discharged to ensure that the gas is completely discharged in the form of gas or gas-liquid mixture before the manual exhaust valve can be closed. During this process, a large amount of liquid without gas is also discharged, resulting in liquid waste.

[0007] Moreover, during the commissioning of the cold source system, there may be a situation where dissolved gases in the liquid precipitate. In the prior art, it is impossible to directly judge the gas precipitation situation, and it is necessary to frequently open the manual exhaust valve for exhaust to ensure that there is no gas inside. Moreover, since the manual exhaust valve is mostly set at a high position, the operation is inconvenient and there are certain safety hazards.

[0008] In summary, how to solve the problems of not being able to intuitively judge whether the gas in the pipeline is completely discharged, the liquid waste caused during the exhaust process, and the inconvenient operation of the manual exhaust valve at a high position is an urgent problem to be solved by those skilled in the art at present. Summary of the Invention

[0009] In view of this, the purpose of the present invention is to provide an exhaust device. By adding a transparent conduit and a stop valve at the outlet end of the manual exhaust valve, it is convenient to intuitively judge whether the gas in the pipeline is completely discharged, reduce the waste of liquid discharge, and at the same time avoid users from frequently climbing to open and close the manual exhaust valve, thereby improving the user experience.

[0010] Another purpose of the present invention is to provide a liquid circulation system including the above exhaust device, which has the same technical features and can solve the same technical problems.

[0011] Another purpose of the present invention is to provide a liquid injection method and an exhaust method applied to the above liquid circulation system, which can intuitively judge whether the gas in the pipeline is completely discharged and reduce the waste caused by liquid discharge.

[0012] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0013] An exhaust device for manually discharging gas in a liquid circulation system;

[0014] The exhaust device includes:

[0015] At least one manual exhaust valve, a transparent conduit is connected in series at the outlet end of the manual exhaust valve, and the height of the transparent conduit near the manual exhaust valve is higher than the outlet end of the manual exhaust valve;

[0016] A stop valve, which is connected in series to the transparent conduit.

[0017] Preferably, the manual exhaust valve is at least two;

[0018] All the manual exhaust valves are conducted with a manifold assembly through different branch transparent conduits, and the manifold assembly is conducted with the stop valve through the transparent conduit.

[0019] Preferably, the exhaust device further includes a liquid storage device, the liquid storage device is open, and the liquid storage device is conducted with the stop valve.

[0020] Preferably, one end of the manual exhaust valve is a threaded connection port, and the other end is a tapered plug for connecting to the transparent conduit;

[0021] and / or,

[0022] One end of the stop valve is a tapered plug for connecting to the transparent conduit.

[0023] A liquid circulation system includes a cold source system, a circulation pump, and an end heat exchange component, and the exhaust device according to any one of the above;

[0024] A closed-loop circuit is formed by connecting the cold source system and the end heat exchange component. The circulation pump is arranged on the closed-loop circuit, and a system liquid discharge and / or liquid injection port is arranged in the closed-loop circuit;

[0025] The manual exhaust valve in the exhaust device is connected and arranged at a preset high position of the pipeline in the closed-loop circuit.

[0026] A liquid injection method is applied to the liquid circulation system described above. The liquid injection method includes:

[0027] Control the system liquid discharge and / or liquid injection port to be connected to a liquid filling device, and fill the closed-loop circuit with liquid;

[0028] Open the manual exhaust valve and the stop valve until the transparent conduit is filled with liquid, and then close the manual exhaust valve and / or the stop valve.

[0029] Preferably, the exhaust device includes at least two of the manual exhaust valves, and the installation heights of different manual exhaust valves are different. All the manual exhaust valves are respectively connected to a manifold assembly through different branch transparent conduits, and the manifold assembly is connected to the stop valve through the transparent conduit;

[0030] Then, open the manual exhaust valve and the stop valve until the transparent conduit is filled with liquid, and then close the manual exhaust valve and / or the stop valve; this step includes:

[0031] Open the manual exhaust valve and the stop valve;

[0032] When any one of the branch transparent conduits is filled with liquid, close the corresponding manual exhaust valve;

[0033] Repeat the above step of closing the corresponding manual exhaust valve until all the manual exhaust valves are closed.

[0034] Preferably, the liquid injection method further includes:

[0035] Control the circulation pump to operate at a low frequency;

[0036] A pressure sensor at the liquid inlet of the circulation pump is controlled to detect the inlet pressure of the circulation pump, and it is judged whether the inlet pressure of the circulation pump is less than a preset pressure value;

[0037] If so, the step of filling the closed-loop circuit with liquid is executed until the inlet pressure of the circulation pump is not less than the preset pressure value;

[0038] If not, the step of detecting the inlet pressure of the circulation pump is returned.

[0039] An exhaust method is applied to the above-mentioned liquid circulation system, and the exhaust method includes:

[0040] The manual exhaust valve corresponding to the filled transparent conduit is controlled to open, the stop valve is closed, and after a preset time, it is judged whether there is gas in the transparent conduit;

[0041] If so, the stop valve is controlled to open until the transparent conduit is filled with liquid;

[0042] If not, the manual exhaust valve is closed.

[0043] Preferably, the manual exhaust valve is controlled to open, the stop valve is closed, and after a preset time, it is judged whether there is gas in the transparent conduit; this step includes:

[0044] The circulation pump is controlled to operate at a low frequency, and at the same time, the manual exhaust valve and the stop valve are controlled to open until the transparent conduit is filled with liquid, the stop valve is closed, and the operation of the circulation pump is stopped;

[0045] After standing for a preset time, it is judged whether there is gas in the transparent conduit.

[0046] The exhaust device provided by the present invention has at least the following beneficial effects compared with the prior art:

[0047] 1. By arranging a manual exhaust valve in the pipeline of the liquid circulation system, when there is gas in the pipeline, it can be discharged through the opened manual exhaust valve. A transparent conduit is added at the outlet end of the manual exhaust valve to visually observe the medium discharged by the manual exhaust valve. If the discharged substance is a gas-liquid mixture, the gas in the gas-liquid mixture will appear in the transparent conduit in the form of bubbles; if the discharged substance is pure liquid, the transparent conduit is filled with liquid and there are no bubbles, indicating that all the gas in the pipeline has been discharged. At this time, the manual exhaust valve can be closed, which is convenient for the user to judge whether all the gas in the pipeline has been discharged and timely close the manual exhaust valve to reduce the waste caused by liquid discharge.

[0048] 2. Moreover, a stop valve is added to control the on-off of the end of the transparent conduit. During the debugging stage, to avoid the precipitation of gas that may exist in the liquid inside, the manual stop valve can be opened, and the opening angle and / or opening time of the stop valve can be adjusted to discharge the gas or liquid inside to the transparent conduit. By observing the medium in the transparent conduit, it can be judged whether gas precipitates. At this time, due to the blockage of the stop valve, a large amount of liquid will not be discharged, avoiding liquid waste;

[0049] After the judgment, if gas precipitates, the gas will be reflected in the transparent conduit in the form of bubbles, then the stop valve is opened to discharge the gas in the pipeline. If no gas precipitates, the transparent conduit is filled with liquid, and then there is no need to open the stop valve. Subsequently, the stop valve cuts off the transparent conduit, reducing the waste of liquid discharged from the pipeline.

[0050] 3. The stop valve is connected to the outlet of the manual exhaust valve through the transparent conduit, effectively extending the outlet position of the manual exhaust valve. Thus, during the debugging process, it is possible to avoid users frequently climbing to open or close the manual exhaust valve, thereby reducing the debugging difficulty and improving the user experience.

[0051] The liquid circulation system provided by the present invention includes the above-mentioned exhaust device and has the same beneficial effects.

[0052] The liquid injection method and exhaust method provided by the present invention are applied to the above-mentioned liquid circulation system. During the liquid injection and exhaust processes, it is possible to intuitively judge whether the gas in the pipeline is completely discharged, reduce the liquid discharge, and reduce the liquid waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0054] Figure 1 It is a schematic structural diagram of the exhaust device and liquid circulation system provided by the present invention.

[0055] In the figure:

[0056] 1. Cold source system; 2. Circulation pump; 3. Terminal heat exchange component; 4. Automatic exhaust valve; 5. Manual exhaust valve; 6. Stop valve; 7. Liquid storage device; 8. Manifold component; 9. Transparent conduit; 10. Pressure sensor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0057] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0058] The core of the present invention is to provide an exhaust device. By adding a transparent conduit and a stop valve at the outlet end of the manual exhaust valve, it is convenient to visually judge whether the gas in the pipeline is completely discharged, reduce the waste of liquid discharge, and at the same time prevent users from frequently climbing to open and close the manual exhaust valve, thereby improving the user experience.

[0059] Another core of the present invention is to provide a liquid circulation system including the above exhaust device, which has the same technical features and can solve the same technical problems.

[0060] Another core of the present invention is to provide a liquid injection method and an exhaust method applied to the above liquid circulation system, which can visually judge whether the gas in the pipeline is completely discharged and reduce the waste caused by liquid discharge.

[0061] Please refer to Figure 1 , an exhaust device for manually discharging gas in a liquid circulation system;

[0062] The exhaust device includes:

[0063] At least one manual exhaust valve 5, a transparent conduit 9 is connected in series at the outlet end of the manual exhaust valve 5, and the height of one end of the transparent conduit 9 close to the manual exhaust valve 5 is higher than the outlet end of the manual exhaust valve 5;

[0064] A stop valve 6, which is connected in series to the transparent conduit 9.

[0065] As Figure 1 shown, by setting the manual exhaust valve 5 at the preset high position of the pipeline in the liquid circulation system, when injecting liquid or debugging, when there is gas in the pipeline of the liquid circulation system, manually open the manual exhaust valve 5, and the gas in the pipeline can be discharged.

[0066] Among them, the preset high position of the pipeline refers to the highest point or the local highest point position of the pipeline. When there is gas in the pipeline, the gas is likely to accumulate at the highest point or the local highest point position of the pipeline. Therefore, when the manual exhaust valve 5 is set at the preset high position of the pipeline, it is beneficial to discharge the gas in the pipeline.

[0067] During the process, since a transparent conduit 9 is connected in series at the outlet end of the manual exhaust valve 5, when there is a large amount of air in the pipeline of the liquid circulation system, all the air discharged by the manual exhaust valve 5 is directly discharged through the transparent conduit 9; when there is a small amount of air in the pipeline of the liquid circulation system, the air-liquid mixture discharged by the manual exhaust valve 5 enters the transparent conduit 9, and the gas in the air-liquid mixture will appear in the transparent conduit 9 in the form of bubbles; when there is no gas in the liquid circulation system or the gas is completely discharged, the pure liquid discharged by the manual exhaust valve 5 enters the transparent conduit 9, and there will be no bubbles in the transparent conduit 9 at this time; during use, the user can visually observe whether there are bubbles in the transparent conduit 9 to judge whether there is gas in the pipeline of the liquid circulation system, and can timely close the manual exhaust valve 5 after determining that the gas in the pipeline is completely discharged, thereby avoiding the discharge of excess liquid and reducing liquid waste.

[0068] Meanwhile, a stop valve 6 is connected in series in the transparent conduit 9. After the liquid circulation system is filled with liquid and left standing for a period of time, there is a possibility that some gas will precipitate in the internal liquid. At this time, by only opening the manual exhaust valve 5, the pipeline of the liquid circulation system can be connected to the transparent conduit 9. At this time, if there is precipitated gas in the pipeline, the gas, liquid or air-liquid mixture will enter the transparent conduit 9 through the manual exhaust valve 5. By visually judging whether there is gas or bubbles in the transparent conduit 9, if there is, it indicates that there is precipitated gas in the pipeline. At this time, the stop valve 6 is opened for exhaust until all the gas is discharged; if not, it indicates that there is no precipitated gas in the pipeline, so there is no need to open the stop valve 6, avoiding the discharge of the liquid in the liquid circulation system and reducing liquid waste.

[0069] Meanwhile, since the transparent conduit 9 is connected in series at the outlet end of the manual exhaust valve 5 and the stop valve 6 is connected in series in the transparent conduit 9, the control distance of exhaust is effectively extended. During the debugging process, the user can control the opening and closing of the stop valve 6 at a remote end to realize the exhaust operation, avoiding frequent climbing to operate the manual exhaust valve 5 and improving the user experience.

[0070] In some embodiments, the transparent conduit 9 is preferably a flexible tube, and its transparency is such that it can clearly observe whether there are bubbles inside, which is convenient for adjusting the relative positions of the stop valve 6 and the manual exhaust valve 5, enabling the user to easily change the position where the operation is performed during debugging; and after the liquid circulation system is filled with liquid and debugged, after removing the transparent conduit 9 and the stop valve 6, it is convenient to carry and can be reused, reducing the use cost.

[0071] It is worth noting that if there are bubbles in the transparent conduit 9, when the stop valve 6 is in the open state, the bubbles will flow in the transparent conduit 9 with the water flow. If the stop valve 6 is in the cut-off state, the bubbles will gather in the part of the transparent conduit 9 that is higher than the outlet end of the manual exhaust valve 5. Therefore, after closing the stop valve 6, when judging whether there are bubbles in the transparent tube 9, the part of the transparent tube 9 that is higher than the outlet end of the manual exhaust valve 5 should be observed in particular.

[0072] In some embodiments, there are at least two manual exhaust valves 5;

[0073] All the manual exhaust valves 5 are connected to the current collecting assembly 8 through different branch transparent conduits, and the current collecting assembly 8 is connected to the stop valve 6 through a transparent conduit 9.

[0074] For the liquid circulation system, there are at least two pipelines, namely the liquid supply pipeline and the liquid return pipeline, and each pipeline has a preset high position where gas may be stored. Therefore, a manual exhaust valve 5 needs to be installed at the preset high position of each pipeline. In order to facilitate the exhaust of each pipeline during the liquid injection and debugging process, a collecting component 8 is used to be connected to all the manual exhaust valves 5 at the same time, so that the exhaust of all the manual exhaust valves 5 is gathered in the transparent conduit 9, and then it is judged whether there is residual gas in all the pipelines.

[0075] Moreover, when the liquid circulation system is filled with liquid, the air inside the low-position pipe can be discharged first. At this time, the manual exhaust valve 5 corresponding to the low-position pipe can be closed first to prevent the liquid in the low-position pipe from being discharged.

[0076] The current collecting component 8 is preferably a collecting pipe, which can connect the outlets of multiple manual exhaust valves 5 to the inlet of the transparent conduit 9 at the same time.

[0077] In some embodiments, the exhaust device further includes a liquid storage device 7 , the liquid storage device 7 is open, and the liquid storage device 7 is in communication with the stop valve 6 .

[0078] like Figure 1 As shown, a liquid storage device 7 is provided at a low position, and the liquid storage device 7 is open, and can collect the liquid discharged through the stop valve 6, and will not affect the pressure in the transparent catheter 9, will not affect the visual judgment result, and the collected liquid can be recovered for subsequent fluid replenishment, thereby reducing liquid waste.

[0079] In some embodiments, one end of the manual exhaust valve 5 is a threaded connection port, and the other end is a pagoda plug for connecting to the transparent catheter 9;

[0080] and / or,

[0081] One end of the stop valve 6 is a pagoda plug for connecting to a transparent conduit 9 .

[0082] One end of the manual exhaust valve 5 is provided with a threaded interface, and the other end is a conical plug. The threaded interface is convenient for fixedly connecting and installing with the preset high position of the pipeline, and the conical plug is convenient for quickly inserting into the transparent conduit 9, which helps to improve the connection tightness between the manual exhaust valve 5 and the preset high position of the pipeline and the quickness of inserting the transparent conduit 9.

[0083] In addition to the exhaust devices disclosed in the above various embodiments, the present invention also provides a liquid circulation system including the above exhaust device. The liquid circulation system includes a cold source system 1, a circulation pump 2, and a terminal heat exchange component 3, and the exhaust device of any one of the above;

[0084] A closed-loop circuit is formed by connecting the cold source system 1 and the terminal heat exchange component 3. The circulation pump 2 is arranged on the closed-loop circuit, and a system liquid discharge and / or liquid injection port is arranged in the closed-loop circuit;

[0085] The manual exhaust valve 5 in the exhaust device is connected and arranged at the preset high position of the pipeline in the closed-loop circuit.

[0086] By integrating the exhaust device in the liquid circulation system, it is convenient for visual exhaust during the liquid injection and debugging process of the liquid circulation system, and reduces the waste of liquid discharge in the liquid circulation system.

[0087] In some embodiments, an automatic exhaust valve 4 is also arranged at the preset high position of the pipeline of the liquid circulation system, which can automatically discharge a small amount of gas generated by the system during the operation of the system.

[0088] In addition to the exhaust device and the liquid circulation system disclosed in the above various embodiments, the present invention also provides a liquid injection method applied to the above liquid circulation system;

[0089] The liquid injection method includes:

[0090] Controlling the connection between the system liquid discharge and / or liquid injection port and the liquid filling device, and filling the closed-loop circuit with liquid;

[0091] Opening the manual exhaust valve 5 and the stop valve 6 until the transparent conduit 9 is filled with liquid, and closing the manual exhaust valve 5 and / or the stop valve 6.

[0092] During liquid filling, there is a large amount of air in the liquid circulation system in the initial stage. Therefore, in the initial stage, the manual exhaust valve 5 and the stop valve 6 are kept in the conducting state. At this time, after the liquid enters the liquid circulation system, the original gas in the liquid circulation system is quickly discharged through the manual exhaust valve 5 and the stop valve 6 until all the gas is exhausted. After the liquid is discharged through the manual exhaust valve 5 and fills the transparent conduit 9, the manual exhaust valve 5 and the stop valve 6 are closed. During the process, the liquid inlet and the gas discharge are carried out synchronously to ensure the pressure balance in the liquid circulation system, and thus it will not hinder the liquid filling, which helps to quickly complete the liquid filling of the liquid circulation system.

[0093] In some embodiments, there are multiple manual exhaust valves 5, and the installation heights of the multiple manual exhaust valves 5 are the same. Therefore, when the transparent conduit 9 is filled with liquid, the stop valve 6 can be directly closed to complete the liquid injection.

[0094] In some embodiments, the exhaust device includes at least two manual exhaust valves 5, and the installation heights of different manual exhaust valves 5 are different. All the manual exhaust valves 5 are respectively communicated with the manifold assembly 8 through different branch transparent conduits, and the manifold assembly 8 is communicated with the stop valve 6 through the transparent conduit 9;

[0095] Then, open the manual exhaust valve 5 and the stop valve 6 until the transparent conduit 9 is filled with liquid, and close the manual exhaust valve 5 and / or the stop valve 6; this step includes:

[0096] Open the manual exhaust valve 5 and the stop valve 6;

[0097] When any branch transparent conduit is filled with liquid, close the corresponding manual exhaust valve 5;

[0098] Repeat the above step of closing the corresponding manual exhaust valve 5 until all the manual exhaust valves 5 are closed.

[0099] For a liquid circulation system with multiple pipelines, manual exhaust valves 5 are provided at the preset high positions of each pipeline. When the pipeline is in the process of liquid injection, the liquid injection is preferentially completed. After all the air inside is completely discharged, the corresponding manual exhaust valve 5 is preferentially closed, thereby preventing the liquid from being discharged from the manual exhaust valve 5, and enabling the newly injected liquid to flow to the other pipelines for distribution, accelerating the overall liquid injection process of the liquid circulation system.

[0100] In some embodiments, the liquid injection method further includes:

[0101] Control the circulation pump 2 to operate at a low frequency;

[0102] Control the pressure sensor 10 at the liquid inlet of the circulation pump 2 to detect the inlet pressure of the circulation pump 2, and judge whether the inlet pressure of the circulation pump 2 is less than the preset pressure value;

[0103] If it is yes, perform the step of filling the liquid into the closed-loop circuit until the inlet pressure of the circulation pump 2 is not less than the preset pressure value;

[0104] If it is no, return to the step of detecting the inlet pressure of the circulation pump 2.

[0105] During the operation of the liquid circulation system, as the gas in the liquid precipitates or the total amount of liquid in the pipeline decreases due to the liquid loss in the system, by detecting the inlet pressure of the circulation pump 2, it is judged whether the liquid in the system needs to be replenished. If replenishment is required, the liquid is filled according to the above liquid filling method. After the liquid filling is completed, the liquid is drained according to the above liquid draining method, so as to ensure that there is sufficient liquid in the system.

[0106] The specific method of liquid replenishment is as follows:

[0107] Control the circulation pump 2 to run at a low frequency;

[0108] Control the pressure sensor 10 to detect the inlet pressure of the circulation pump 2;

[0109] When the inlet pressure of the circulation pump 2 is less than the preset pressure value, control the liquid drainage and / or liquid injection port of the system to be connected to the liquid filling device, and fill the liquid into the closed-loop circuit;

[0110] Open the manual exhaust valve 5 and the stop valve 6 until the transparent conduit 9 is filled with liquid, and then close the manual exhaust valve 5;

[0111] Control the transparent conduit 9 to be filled with liquid;

[0112] Control the manual exhaust valve 5 to open and the stop valve 6 to close, and judge whether there is gas in the transparent conduit 9 after a preset time;

[0113] If it is yes, control the stop valve 6 to open until the transparent conduit 9 is filled with liquid;

[0114] If it is no, close the manual exhaust valve 5.

[0115] Or,

[0116] Control the circulation pump 2 to run at a low frequency;

[0117] Control the pressure sensor 10 to detect the inlet pressure of the circulation pump 2;

[0118] When the inlet pressure of the circulation pump 2 is less than the preset pressure value, control the liquid drainage and / or liquid injection port of the system to be connected to the liquid filling device, and fill the liquid into the closed-loop circuit;

[0119] Open the manual exhaust valve 5 and the stop valve 6;

[0120] When any branch transparent conduit is filled with liquid, close the corresponding manual exhaust valve 5;

[0121] Repeat the above steps of closing the corresponding manual exhaust valve 5 until all the manual exhaust valves 5 are closed;

[0122] Control the transparent conduit 9 to be filled with liquid;

[0123] Control the circulation pump 2 to operate at a low frequency, and at the same time control the manual exhaust valve 5 and the stop valve 6 to open until the transparent conduit 9 is filled with liquid, then close the stop valve 6 and stop the operation of the circulation pump 2;

[0124] After standing for a preset time, determine whether there is gas in the transparent conduit 9;

[0125] If so, control the stop valve 6 to open until the transparent conduit 9 is filled with liquid;

[0126] If not, close the manual exhaust valve 5.

[0127] In addition to the exhaust device and the liquid circulation system disclosed in each of the above embodiments, the present invention also provides an exhaust method, which is applied to the above liquid circulation system. The exhaust method includes:

[0128] Control the corresponding manual exhaust valve 5 of the transparent conduit 9 filled with liquid to open, and the stop valve 6 to close. After a preset time, determine whether there is gas in the transparent conduit 9;

[0129] If so, control the stop valve 6 to open until the transparent conduit 9 is filled with liquid;

[0130] If not, close the manual exhaust valve 5.

[0131] During the debugging stage, in order to avoid the liquid in the pipeline from precipitating gas, the liquid circulation system is exhaust again;

[0132] During the process, it is preferred to ensure that the transparent conduit 9 is in a state of being filled with liquid. Then open the manual exhaust valve 5. If there is gas in the pipeline, the gas will enter the transparent conduit 9 and can be observed by the user. Then open the stop valve 6 to discharge the bubbles. If there is no gas in the pipeline, there is no need to open the stop valve 6 to avoid the liquid in the pipeline from being discharged.

[0133] It should be noted that the amount of gas precipitated from the liquid in the pipeline is usually small. Therefore, after opening the manual exhaust valve 5, it should stand for a period of time to ensure that the gas in the pipeline can enter the transparent conduit 9 through the manual exhaust valve 5 and can be observed by the user.

[0134] Moreover, in the actual implementation process, after liquid injection, the transparent conduit 9 is usually in a state of being filled with liquid. However, during the debugging process, in order to ensure that the gas in the corresponding pipeline is completely discharged, pre-liquid injection should be carried out on the transparent conduit 9 by external addition or other means to make it in a state of being filled with liquid.

[0135] In some embodiments, the manual exhaust valve 5 is controlled to open and the stop valve 6 is closed, and it is judged whether there is gas in the transparent conduit 9 after a preset time; this step includes:

[0136] The circulation pump 2 is controlled to operate at a low frequency, and at the same time, the manual exhaust valve 5 and the stop valve 6 are controlled to open until the transparent conduit 9 is filled with liquid, then the stop valve 6 is closed and the operation of the circulation pump 2 is stopped;

[0137] After standing for a preset time, it is judged whether there is gas in the transparent conduit 9.

[0138] Through the low-frequency operation of the circulation pump 2, the gas at different positions in the pipeline can move with the water flow to the preset high position of the pipeline, and then can be discharged into the transparent conduit 9 through the manual exhaust valve 5. Moreover, the circulation pump 2 operates at a low frequency, which will not cause a sharp increase in the pipeline pressure and avoid the connection dropout caused by the increase in the pressure in the transparent conduit 9.

[0139] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same and similar parts among the various embodiments, reference can be made to each other.

[0140] The exhaust device, liquid circulation system, liquid injection method and exhaust method provided by the present invention have been introduced in detail above. Specific examples are used herein to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. An exhaust device for manually discharging gas in a liquid circulation system, characterized in that, Comprising: At least one manual exhaust valve (5), a transparent conduit (9) is connected in series at the outlet end of the manual exhaust valve (5), and the height of one end of the transparent conduit (9) close to the manual exhaust valve (5) is higher than the outlet end of the manual exhaust valve (5); A stop valve (6), which is connected in series to the transparent conduit (9).

2. The exhaust device according to claim 1, characterized in that, There are at least two of the manual exhaust valves (5); All of the manual exhaust valves (5) are communicated with a manifold assembly (8) through different branched transparent conduits, and the manifold assembly (8) is communicated with the stop valve (6) through the transparent conduit (9).

3. The exhaust device according to claim 1, characterized in that, It further includes a liquid storage device (7), the liquid storage device (7) is open, and the liquid storage device (7) is communicated with the stop valve (6).

4. The exhaust device according to any one of claims 1 to 3, characterized in that One end of the manual exhaust valve (5) is a threaded connection port, and the other end is a pagoda plug for connecting with the transparent conduit (9); And / or, One end of the stop valve (6) is a pagoda plug for connecting with the transparent conduit (9).

5. A liquid circulation system, characterized in that, Comprising a cold source system (1), a circulation pump (2), a terminal heat exchange assembly (3) and the exhaust device according to any one of claims 1-4; A closed-loop circuit is formed by connecting the cold source system (1) and the terminal heat exchange assembly (3), the circulation pump (2) is arranged on the closed-loop circuit, and a system liquid discharge and / or liquid injection port is arranged in the closed-loop circuit; The manual exhaust valve (5) in the exhaust device is communicated with a preset high position of the pipeline arranged in the closed-loop circuit.

6. A liquid injection method, characterized in that, Applied to the liquid circulation system according to claim 5, the liquid injection method includes: Controlling the connection of the system liquid discharge and / or liquid injection port with a liquid filling device, and filling the closed-loop circuit with liquid; Opening the manual exhaust valve (5) and the stop valve (6) until the transparent conduit (9) is filled with liquid, and closing the manual exhaust valve (5) and / or the stop valve (6).

7. The liquid injection method according to claim 6, wherein The exhaust device includes at least two of the manual exhaust valves (5), and the installation heights of different manual exhaust valves (5) are different. All of the manual exhaust valves (5) are respectively communicated with a manifold assembly (8) through different branched transparent conduits, and the manifold assembly (8) is communicated with the stop valve (6) through the transparent conduit (9); Then, opening the manual exhaust valve (5) and the stop valve (6) until the transparent conduit (9) is filled with liquid, and closing the manual exhaust valve (5) and / or the stop valve (6); this step includes: Opening the manual exhaust valve (5) and the stop valve (6); When any one of the branched transparent conduits is filled with liquid, closing the corresponding manual exhaust valve (5); Repeating the above step of closing the corresponding manual exhaust valve (5) until all of the manual exhaust valves (5) are closed.

8. The liquid injection method according to claim 6, characterized in that, It further includes: Controlling the circulation pump (2) to operate at a low frequency; Controlling the pressure sensor (10) at the liquid inlet of the circulation pump (2) to detect the inlet pressure of the circulation pump (2), and judging whether the inlet pressure of the circulation pump (2) is less than a preset pressure value; If yes, perform the step of filling the liquid into the closed-loop circuit until the inlet pressure of the circulation pump (2) is not less than the preset pressure value; If no, return to the step of detecting the inlet pressure of the circulation pump (2).

9. An exhaust method, characterized in that, Applied to the liquid circulation system according to claim 5, the exhaust method includes: Control the opening of the manual exhaust valve (5) corresponding to the transparent conduit (9) filled with liquid, close the stop valve (6), and determine whether there is gas in the transparent conduit (9) after a preset time; If yes, control the opening of the stop valve (6) until the transparent conduit (9) is filled with liquid, and close the manual exhaust valve (5) and / or the stop valve (6); If no, close the manual exhaust valve (5).

10. The exhaust method according to claim 9, characterized in that, Control the opening of the manual exhaust valve (5), close the stop valve (6), and determine whether there is gas in the transparent conduit (9) after a preset time; this step includes: Control the circulation pump (2) to run at a low frequency, and at the same time control the opening of the manual exhaust valve (5) and the stop valve (6) until the transparent conduit (9) is filled with liquid, close the stop valve (6), and stop the operation of the circulation pump (2); After standing for a preset time, determine whether there is gas in the transparent conduit (9).

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