A leak-proof water supply valve with discharge function and control method thereof

Abstract

The present invention relates to the field of valves, and is a leak-proof water-supplementing valve with a discharge function, comprising a valve body; a valve core assembly, an execution end controlling the flow and disconnection of a medium replenishment channel and a medium discharge channel; a pressure sensor and a flow sensor; a controller, which compares the feedback data of the pressure sensor with the system preset data, and controls the action of the valve core assembly based on the comparison result and logical reasoning. The flow sensor and the pressure sensor in the leak-proof water-supplementing valve are used to monitor the total amount of medium replenishment and pressure parameters in a closed circulation system. When the total amount of medium or pressure change in the closed circulation system is monitored, the controller automatically controls the action of the valve core assembly according to the monitoring result, repeatedly monitors the total amount of medium replenishment and pressure parameters in the closed circulation system, and determines whether the closed circulation system is replenishing the medium normally or leaking; thereby realizing the functions of automatically replenishing the medium, timely detecting leakage and alarming, and timely discharging the medium to prevent the expansion of losses.

Description

Technical Field

[0001] The present invention relates to the field of valves, and in particular to a device for replenishing water, air, oil or other media in a closed circulation system, and more particularly to a device for timely closing a medium replenishing channel and quickly discharging the medium in the closed system into an external space or into a reserved collection device when a leak occurs in the closed system, while giving an alarm signal. Background Art

[0002] The valve is a control component in the fluid conveying system, which has the functions of shutting off, regulating, guiding, preventing backflow, stabilizing pressure, diverting or overflowing pressure relief. For example, the prior art disclosed in the utility model patent with the authorization announcement number CN205980165U includes a device, which includes a micro switch placed at the front end of the electric valve, and the control unit determines that the closed system is leaking only based on its 30S signal, and the accuracy is very poor. For example, it will malfunction when the external water is cut off or the system leaks slightly. A device disclosed in the utility model patent with the authorization application number 201621355876.9 includes a magnetic switch and a control panel for detecting the interruption of water flow, and sets the time to determine whether there is a leak. Obviously, it cannot prevent short-term large-flow leakage, and the time limit brings inconvenience to the use. It also does not have the function of replenishing water, air, oil or other media for the closed system. The utility model patent with the authorization application number 201620247963.6 discloses a device, which includes a flow metering device and a control panel. The electric-controlled anti-leakage valve ensures normal water use by quantitatively controlling a single continuous water supply. When the set water consumption is exceeded, it is judged as an accidental water leakage or water leakage, which cannot adapt to places with large fluctuations in water consumption. Therefore, the valves in the prior art still have defects and do not have the following functions at the same time: 1) Normally replenish water, air, oil or other substances for the closed system, 2) Timely detect and alarm when a closed system leaks, 3) Fault tolerance when a small leak occurs in the system but the leak point cannot be found, and the leak does not cause intolerable losses.

[0003] In order to solve the above-mentioned technical problems, the applicant recently submitted an invention patent application with application number "2018111166687", which records a leak-proof water-making valve and its detection and control method, which can solve the above-mentioned technical problems. On this basis, the applicant believes that there is still one shortcoming in the leak-proof water-making valve, that is, when the closed system is in a state of large leakage, even if the leak-proof water-making valve is closed in time, it will cause the original medium in the closed system to leak, which can easily lead to large economic losses. Therefore, the applicant made improvements based on the above-mentioned scheme, and the obtained leak-proof water-making valve can close the medium replenishment channel in time and quickly discharge the medium in the closed system into the external space or into a reserved collection device when a leak occurs in the closed system. Summary of the invention

[0004] In order to solve the above problems, the purpose of the present invention is to provide a leak-proof water replenishment valve and a detection and control method thereof, wherein the sensors (including flow sensors and pressure sensors) in the leak-proof water replenishment valve are used to monitor the total amount of medium replenishment and fluid pressure in the closed circulation system, and the controller automatically controls the action of the valve core assembly according to the monitoring results, thereby achieving 1) automatic medium replenishment; 2) timely detection of system leakage; 3) cutting off the medium replenishment source to prevent larger leakage; 4) when leakage occurs, the medium in the closed system is quickly discharged to the external space or to a reserved collection device, and 5) when the leakage point cannot be found for a tolerable small leakage, fault-tolerant measures are taken. 6) Contact signals and alarm signals are given to facilitate users to quickly take measures to release the closed system medium and prevent the loss from expanding.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0006] A leak-proof water supply valve with a discharge function, characterized in that:

[0007] The valve body is provided with a fluid medium inlet, a fluid medium outlet and a fluid medium discharge port, a medium replenishing channel is formed between the fluid medium inlet and the fluid medium outlet, and a medium discharge channel is formed between the fluid medium discharge port and the fluid medium outlet;

[0008] The valve core assembly, the actuator end is placed inside the valve body and at the intersection of the fluid medium inlet, the fluid medium outlet and the fluid medium discharge port, and the actuator end controls the flow and disconnection of the medium replenishment channel and the medium discharge channel;

[0009] A pressure sensor is placed in the medium supply channel downstream of the valve core assembly and is used to detect fluid pressure parameters, which can characterize the medium characteristics in the closed circulation system;

[0010] A flow sensor is placed in the medium supply channel and is used to detect the flow parameters of the fluid;

[0011] The controller compares the feedback data from the pressure sensor with the system preset data, and controls the action of the valve core assembly based on the comparison result and logical reasoning.

[0012] In the above scheme, when the fluid pressure is at a normal pressure value, it means that the closed circulation system is in a normal working state; when the fluid pressure value decreases rapidly, it means that the closed circulation system may be in a leaking state; and when the fluid pressure value drops slightly frequently and multiple times, it means that the closed circulation system may be in a micro-leakage state; further combined with the action of the valve core assembly, it can be determined whether the system is actually leaking.

[0013] Preferably, the flow sensor detects the fluid velocity and cumulative mass parameters of the medium added into the closed circulation system. The flow sensor detects the fluid replenishment quantity parameter; when the fluid replenishment quantity is at a normal value, it means that the closed circulation system is in a normal working state; and when the fluid replenishment quantity value becomes larger, it means that the closed circulation system may be in a leaking state. Further combined with the combined action of the valve core assembly and the pressure sensor, it can be clearly determined whether the system is in a state of large leakage, medium leakage, slight leakage, etc. or is still in a normal state.

[0014] Preferably, a one-way valve assembly is further included, which is placed in the medium replenishment channel downstream of the valve core assembly and automatically adjusts its opening angle according to the medium pressure upstream and downstream thereof.

[0015] Preferably, the one-way valve assembly includes a one-way valve disc and a torsion spring, and a one-way valve port is provided inside the valve body; one end of the one-way valve disc is hinged on one side of the one-way valve port, and the torsion spring is provided on the hinged end of the one-way valve disc; the force of the torsion spring on the one-way valve disc drives the one-way valve disc to close the one-way valve port. In the above technical scheme, the one-way valve disc is driven by the torsion spring, but the elasticity of the torsion spring is relatively small. When the fluid pressure downstream of the one-way valve port plus the elastic force of the torsion spring is less than the fluid pressure upstream of the one-way valve port, the one-way valve disc is driven by the power of the fluid to rotate and open. When the fluid pressure downstream of the one-way valve port plus the elastic force of the torsion spring is greater than the fluid pressure upstream of the one-way valve port, the reverse pressure of the fluid plus the elastic force of the torsion spring will drive the one-way valve disc to close the one-way valve port; thereby preventing the fluid from flowing back and limiting the medium to flow in only one direction. When the fluid pressure at the one-way valve port is small, the torsion spring will exert force on the one-way valve plate, thereby maintaining the appropriate opening of the one-way valve plate. The water flow adjusted by the one-way valve plate with appropriate opening can effectively prevent the generation of turbulence, so that the pressure sensor can detect the correct value; the water flow direction adjusted by the one-way valve plate with appropriate opening is controlled, so that the flow sensor can detect smaller flow data.

[0016] Preferably, the flow sensor includes an impeller, and a flow chamber is provided at the impeller inside the valve body, the impeller rotation axis is arranged in the flow chamber, and the wheel center of the impeller is eccentrically arranged with the center line of the medium supply channel; the one-way valve plate guides the fluid obliquely to the outer edge of the impeller blade when in the open state. In this technical solution, the one-way valve plate has a guiding effect on the fluid in the open state, so that the fluid is focused on one side of the medium supply channel, and at the same time guides it to flow to the outer edge of the impeller blade, thereby increasing the power to drive the impeller to rotate. Electronic components are installed on the impeller assembly, and the rotation of the impeller causes the electrical signal of the device to change. The signal is output to the single-chip CPU, and after data processing, it is used as the measurement value of the flow sensor for control.

[0017] Preferably, the pressure taking point of the pressure sensor is arranged in a non-turbulent area on the downstream side of the valve core assembly and the one-way valve.

[0018] Preferably, the pressure sampling point of the pressure sensor is located in the opening path of the one-way valve. In this solution, when the one-way valve is in a closed state, the sampling point of the pressure sensor is in a closed circulation system, and the pressure of the fluid medium in the closed circulation system can be monitored; when the one-way valve is in an open state, the sampling point of the sensor is in the guiding area of ​​the one-way valve for the medium, and the performance parameters of the fluid medium can be monitored in real time.

[0019] Preferably, a filter screen is provided on the fluid medium inlet of the valve body to prevent foreign matter from entering the closed circulation system.

[0020] Preferably, the valve core assembly includes a spherical valve core, a valve stem connected to the spherical valve core, and a driving component for driving the valve stem and the spherical valve core; the execution end is the spherical valve core, and an L-shaped valve core channel is provided in the spherical valve core.

[0021] A method for detecting leakage prevention and water replenishment of a closed circulation system, characterized in that: the method uses the leakage prevention and water replenishment valve described in any one of the above; and adopts the following comparison method:

[0022] 1) Compare the fluid pressure parameter detected by the pressure sensor with the fluid pressure parameter of the closed circulation system under normal conditions;

[0023] 2) When the fluid pressure parameter is higher than the normal value, the controller drives the valve core assembly to operate and close the medium replenishment channel and the medium discharge channel;

[0024] 3) When the fluid pressure parameter is lower than the normal value, the controller drives the valve core assembly to connect the medium replenishment channel to replenish the medium from the outside; if the fluid pressure parameter is restored, the replenishment of the medium is considered normal; if too much medium is replenished or the value of the sensor does not return to normal, the controller drives the valve core assembly to connect the medium replenishment channel and monitor the measured value of the pressure sensor. If it is continuously lower than the normal value, it is determined to be a leak;

[0025] 4) When there is a leak, the controller distinguishes between large leaks and small leaks based on the data from the flow sensor;

[0026] 5) When there is a leakage, the controller starts the valve core assembly, gives a fault contact signal and triggers an alarm;

[0027] 6) Based on the judgment in step 4), when there is a large leakage, the controller starts the valve core assembly to connect the medium discharge channel and discharge the system medium into the external space or the reserved collection device in time;

[0028] 7) When a small leak occurs in the system, the controller sends out an alarm. However, after checking, the user cannot find the leak point and confirm that the leak has not caused intolerable losses. The user can press the "fault tolerance button" and the intelligent anti-leak water supply valve will ignore the small leak and allow the system to work normally.

[0029] A leak-proof water replenishment detection method with a discharge function, characterized in that: it uses the leak-proof water replenishment valve described in any one of the above; and adopts the following comparison method:

[0030] 1) When the controller drives the valve core assembly to connect the medium replenishment channel; the flow sensor measures the flow parameter of the replenishment medium, and the controller compares the flow parameter obtained by the above measurement with the flow parameter control value under normal state;

[0031] 2) When the measured flow parameters are within the flow parameter control value under normal conditions, it is judged to be normal;

[0032] 3) When the measured flow parameter exceeds the flow parameter control value under normal conditions, the controller drives the valve core assembly to connect the medium replenishment channel; the fluid pressure parameter detected by the pressure sensor is compared with the fluid pressure parameter of the closed circulation system under normal conditions; if the fluid pressure parameter is continuously lower than the normal value, it is determined to be a leak; if the fluid pressure parameter returns to the normal value range, it is determined that the system is still normal;

[0033] 4) When there is a leakage, the controller distinguishes between large leakage and small leakage according to the flow parameters of the flow sensor.

[0034] 5) When there is a leakage, the controller starts the valve core assembly, gives a fault contact signal and triggers an alarm;

[0035] 6) Based on the judgment in step 4), when there is a large leakage, the controller starts the valve core assembly to connect the medium discharge channel and discharge the system medium into the external space or the reserved collection device in time;

[0036] 7) When a small leak occurs in the system, the controller sends out an alarm. However, after checking, the user cannot find the leak point and confirm that the leak has not caused intolerable losses. The user can press the "fault tolerance button" and the intelligent anti-leak water supply valve will ignore the small leak and allow the system to work normally.

[0037] The present invention adopts the above-mentioned technical scheme, which relates to a leak-proof water replenishment valve on the one hand, and a leak-proof water replenishment detection method for a closed circulation system on the other hand; it also relates to timely discharging the medium in the system into an external space or a reserved collection device when a leak occurs in the closed circulation system. The flow sensor and pressure sensor in the leak-proof water replenishment valve are used to monitor the total amount of medium replenishment and pressure parameters in the closed circulation system. When the total amount of medium or pressure change in the closed circulation system is monitored, the controller automatically controls the action of the valve core assembly according to the monitoring result, repeatedly monitors the total amount of medium replenishment and pressure parameters in the closed circulation system, and compares with the built-in parameters and logical reasoning to determine whether the closed circulation system is replenishing the medium normally or leaking; thereby realizing the functions of automatically replenishing the medium, timely detecting leaks and alarming, and timely discharging the medium to prevent the expansion of losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a side sectional schematic diagram of a leak-proof water supply valve.

[0039] Figure 2 It is a top cross-sectional view of the leak-proof water supply valve.

[0040] Figure 3 for Figure 2 Enlarged view of part A.

[0041] Figure 4 This is a schematic diagram of a closed system in a closed state.

[0042] Figure 5 This is a schematic diagram of a closed system in a release state.

[0043] Figure 6 This is a schematic diagram of a closed system in the water replenishment state. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0045] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 therefore cannot be understood as a limitation on the present invention.

[0046] Embodiment 1:

[0047] like Figures 1 to 6The leak-proof water replenishment valve with a discharge function shown in the figure includes a valve body 1, a valve core assembly 2, a pressure sensor 3, a one-way valve assembly 4, a flow sensor 5 and a controller. The closed circulation system refers to a medium in a closed circulation loop during operation. The closed circulation system applicable to the leak-proof water replenishment valve includes a cold (heat) agent system in an air-conditioning system. In the leak-proof water replenishment valve, a fluid medium inlet 11, a fluid medium outlet 12 and a fluid medium discharge port 17 are provided on the valve body 1. The side walls of the pipe openings of the fluid medium inlet 11, the fluid medium outlet 12 and the fluid medium discharge port 17 are usually provided with connecting threads to facilitate pipeline connection; a medium replenishment channel is formed between the fluid medium inlet 11 and the fluid medium outlet 12; and a medium discharge channel is formed between the fluid medium discharge port 17 and the fluid medium outlet. After the leak-proof water replenishment valve is connected to the waterway, the closed circulation system is downstream of the fluid medium outlet 12, the external supply system is upstream of the fluid medium inlet 11, and the external space or a reserved collection device is downstream of the fluid medium discharge port 17. A filter screen is provided on the fluid medium inlet 11 of the valve body 1 to prevent foreign matter from entering the closed circulation system.

[0048] The valve core assembly 2 has an actuator end placed inside the valve body and at the intersection of the fluid medium inlet, the fluid medium outlet and the fluid medium discharge port. The actuator end controls the flow and disconnection of the medium replenishment channel and the medium discharge channel. Specifically, it includes the following three states: 1) When the fluid medium outlet 12 is connected to the fluid medium inlet 11, the medium replenishment channel is in a flow state; 2) When the fluid medium outlet 12 is connected to the fluid medium discharge port 17, the medium discharge channel is in a flow state; 3) When the fluid medium outlet 12 is not connected to the fluid medium inlet 11 and the fluid medium discharge port 17, the medium replenishment channel and the medium discharge channel are both in a closed state, and the closed system is isolated from all external channels. In one embodiment, the valve core assembly 2 includes a spherical valve core 21, a valve stem 22 connected to the spherical valve core, and a driving component that drives the valve stem and the spherical valve core; the actuator end is a spherical valve core, and an L-shaped valve core channel 23 is provided in the spherical valve core. The driving component can be a reducer and a driving motor. The driving motor drives the valve stem through the reducer, and the valve stem drives the spherical valve core to rotate 360 ​​degrees. The ball valve rotates to different positions to control the flow, disconnection and discharge of the medium. Of course, the valve core assembly 2 can also be set as a three-position three-way valve structure.

[0049] The pressure sensor 3 is placed on the medium replenishment channel downstream of the valve core assembly 2, and is used to detect fluid pressure parameters, which can characterize the medium pressure in the closed circulation system. Specifically, under a constant working state, the characteristics of the medium can be characterized by the medium pressure. The pressure sensor detects the fluid pressure parameters in the closed circulation system. In this technical solution, when the fluid pressure is at a normal pressure value, it means that the closed circulation system is in a normal working state; and when the fluid pressure value decreases rapidly, it means that the closed circulation system may be in a leaking state; and when the fluid pressure value drops slightly frequently and multiple times, it means that the closed circulation system may be in a micro-leakage state; further combined with the action of the valve core assembly, it can be determined whether the system is actually leaking.

[0050] The one-way valve assembly 4 is placed in the medium replenishment channel downstream of the valve core assembly 2, and automatically adjusts its opening angle according to the medium pressure upstream and downstream thereof. The one-way valve assembly 4 includes a one-way valve disc 41 and a torsion spring 42, and a one-way valve port 15 is provided inside the valve body 1; one end of the one-way valve disc 41 is hinged on one side of the one-way valve port 15, and the torsion spring 42 is arranged on the hinged end of the one-way valve disc 41; the force of the torsion spring 42 on the one-way valve disc 41 drives the one-way valve disc 41 to close the one-way valve port 15. In the above technical scheme, the one-way valve disc 41 is driven by the torsion spring 42, but the elasticity of the torsion spring 42 is relatively small, so under the condition of the fluid pressure difference of the one-way valve port 15, the fluid will act on the one-way valve disc 41, thereby automatically adjusting the opening; when the fluid pressure downstream of the one-way valve port 15 is less than or equal to the fluid pressure upstream of the one-way valve port 15, the one-way valve disc 41 is driven by the power of the fluid to rotate and open. When the fluid pressure downstream of the one-way valve port 15 is greater than or equal to the fluid pressure upstream of the one-way valve port 15, the fluid reverse pressure and the elastic force of the torsion spring 42 will drive the one-way valve plate 41 to close the one-way valve port 15, thereby preventing the fluid from flowing back and limiting the medium to flow in one direction only.

[0051] In addition, the maximum opening angle of the one-way valve plate 41 is 75°, and the sampling point 31 of the pressure sensor 3 is within the opening inner diameter of the one-way valve plate 41; in this scheme, when the one-way valve plate 41 is in a closed state, the sampling point of the pressure sensor 3 is in a closed circulation system, and the fluid medium pressure in the closed circulation system can be monitored; and when the one-way valve plate 41 is in an open state, the sampling point of the pressure sensor 3 is in the guiding area of ​​the one-way valve plate 41 for the medium, and the performance parameters of the fluid medium can be monitored in real time.

[0052] The flow sensor 5 is placed in the medium replenishment channel downstream of the valve core assembly 2, and is used to detect the flow of the fluid. Specifically, the flow sensor includes an impeller 51, and a flow chamber 16 is provided inside the valve body 1 downstream of the one-way valve port 15. The impeller 51 is rotatably arranged in the flow chamber, and the wheel center of the impeller 51 is eccentrically arranged with the center line of the medium replenishment channel; the one-way valve plate 41 guides the fluid obliquely to the outer edge of the blade of the impeller 51 when it is in the open state. In this technical solution, the one-way valve plate 41 has a guiding effect on the fluid when it is in the open state, so that the fluid is focused on one side of the medium replenishment channel, and at the same time guides it to flow to the outer edge of the blade of the impeller 51, thereby increasing the power to drive the impeller 5 to rotate. An electronic component 52 is installed on the impeller assembly, and the rotation of the impeller causes the electrical signal of the component to change. The signal is output to the single-chip CPU, and after data processing, it is used as the measurement value of the flow sensor to participate in the control.

[0053] The controller compares the feedback data of the pressure sensor 3 and the flow sensor 5 with the preset data of the system, and controls the action of the valve core assembly 2 based on the comparison result. It includes a control circuit board with a single-chip microcomputer, which is mainly composed of 5 parts: power supply part, signal acquisition input part, central data processing part, display operation part, and output execution part.

[0054] Based on the above implementation, the purpose is to design the pressure measurement, flow measurement, and fluid flow control of the closed circulation system in a trinity. On the one hand, the pressure sensor 3 in the leak-proof water supply valve is used to measure the medium pressure in the closed circulation system, and the flow sensor 5 is used to monitor the total amount of medium supplemented in the closed circulation system, and the controller automatically controls the action of the valve core component 2 according to the monitoring result. When the medium pressure of the closed circulation system is detected to be reduced, the valve core component 2 is opened to supplement the medium (such as water, gas, oil or other fluid medium) from the outside to the closed circulation system; when the amount of supplemented medium exceeds the preset value, the combined action of the valve core component 2 and the pressure sensor 3 is started, and it can be clearly determined that the system is in a state of large leakage, medium leakage, slight leakage, etc. or is still in a normal state. Thereby achieving the purpose of automatically supplementing the medium and distinguishing the leakage. On the other hand, the leak-proof water supply valve is provided with a movable one-way valve plate 41. When the fluid power is very small, its opening is appropriately reduced to increase the fluid power, overcome the turbulent state, make the pressure measurement and flow measurement of the fluid more accurate, and at the same time expand its small flow measurement range or lower limit range value. When the fluid power is large, the valve plate will automatically increase its opening to reduce its resistance. For the fluid of the same pipe diameter, the maximum range or upper limit range value can be expanded. When the fluid flows in the reverse direction, the valve body 1 will be closed under the action of the fluid power and spring force to prevent the fluid from flowing back and play the function of one-way flow.

[0055] Embodiment 2:

[0056] This embodiment relates to a closed circulation system leak-proof water replenishment detection method, which uses the leak-proof water replenishment valve described in Example 1; and adopts the following comparison method:

[0057] 1) Compare the fluid pressure parameter detected by the pressure sensor with the fluid pressure parameter of the closed circulation system under normal conditions;

[0058] 2) When the fluid pressure parameter is higher than the normal value, the controller drives the valve core assembly to operate and close the medium replenishment channel and the medium discharge channel;

[0059] 3) When the fluid pressure parameter is lower than the normal value, the controller drives the valve core assembly to connect the medium replenishment channel to replenish the medium from the outside; if the fluid pressure parameter is restored, the replenishment of the medium is considered normal; if too much medium is replenished or the value of the sensor does not return to normal, the controller drives the valve core assembly to connect the medium replenishment channel and monitor the measured value of the pressure sensor. If it is continuously lower than the normal value, it is determined to be a leak;

[0060] 4) When there is a leak, the controller distinguishes between large leaks and small leaks based on the data from the flow sensor;

[0061] 5) When there is a leakage, the controller starts the valve core assembly, gives a fault contact signal and triggers an alarm;

[0062] 6) Based on the judgment in step 4), when there is a large leakage, the controller starts the ball valve assembly to connect the medium discharge channel and discharge the system medium into the external space or the reserved collection device in time;

[0063] 7) When a small leak occurs in the system, the controller sends out an alarm. However, after checking, the user cannot find the leak point and confirm that the leak has not caused intolerable losses. The user can press the "fault tolerance button" and the intelligent anti-leak water supply valve will ignore the small leak and allow the system to work normally.

[0064] Embodiment 3:

[0065] This embodiment relates to a closed circulation system leak-proof water replenishment detection method, which uses the leak-proof water replenishment valve described in Example 1; and adopts the following comparison method:

[0066] 1) When the controller drives the valve core assembly to connect the medium replenishment channel; the flow sensor measures the flow parameter of the replenishment medium, and the controller compares the flow parameter obtained by the above measurement with the flow parameter control value under normal state;

[0067] 2) When the measured flow parameters are within the flow parameter control value under normal conditions, it is judged to be normal;

[0068] 3) When the measured flow parameter exceeds the flow parameter control value under normal conditions, the controller drives the ball valve assembly 2 to operate and connect the medium replenishment channel; the fluid pressure parameter detected by the pressure sensor is compared with the fluid pressure parameter of the closed circulation system under normal conditions; if the fluid pressure parameter is continuously lower than the normal value, it is determined to be a leak; if the fluid pressure parameter returns to within the normal value range, it is determined that the system is still normal;

[0069] 4) When there is a leakage, the controller distinguishes between large leakage and small leakage according to the flow parameters of the flow sensor.

[0070] 5) When there is a leakage, the controller starts the valve core assembly, gives a fault contact signal and triggers an alarm;

[0071] 6) Based on the judgment in step 4), when there is a large leakage, the controller starts the ball valve assembly to connect the medium discharge channel and discharge the system medium into the external space or the reserved collection device in time;

[0072] 7) When a small leak occurs in the system, the controller sends out an alarm. However, after checking, the user cannot find the leak point and confirm that the leak has not caused intolerable losses. The user can press the "fault tolerance button" and the intelligent anti-leak water supply valve will ignore the small leak and allow the system to work normally.

[0073] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A leak-proof water supply valve with a discharge function, characterized in that: include The valve body is provided with a fluid medium inlet, a fluid medium outlet and a fluid medium discharge port, a medium replenishing channel is formed between the fluid medium inlet and the fluid medium outlet, and a medium discharge channel is formed between the fluid medium discharge port and the fluid medium outlet; The valve core assembly, the actuator end is placed inside the valve body and at the intersection of the fluid medium inlet, the fluid medium outlet and the fluid medium discharge port, and the actuator end controls the flow and disconnection of the medium replenishment channel and the medium discharge channel; A pressure sensor is placed in the medium channel downstream of the valve core assembly and is used to detect a fluid pressure parameter, which can characterize the medium characteristics in the closed circulation system; A flow sensor is placed in the medium channel and is used to detect the flow parameters of the fluid; The controller compares the feedback data from the sensor with the preset data of the system, and controls the action of the valve core assembly based on the comparison result and logical reasoning; It also includes a one-way valve assembly, which is placed in the medium channel downstream of the valve core assembly and automatically adjusts its opening angle according to the medium pressure upstream and downstream thereof; the pressure point of the pressure sensor is arranged in the non-turbulent area on the downstream side of the valve core assembly and the one-way valve assembly; The flow sensor detects the fluid velocity and cumulative mass parameters of the medium added into the closed circulation system. The flow sensor includes an impeller, and a flow cavity is provided at the impeller inside the valve body. The impeller rotating shaft is arranged in the flow cavity, and the wheel center of the impeller is eccentrically arranged with the center line of the medium channel. When the one-way valve assembly is in the open state, the fluid is obliquely guided to the outer edge of the impeller blade.

2. The anti-leakage water supply valve with a discharge function according to claim 1, characterized in that: The one-way valve assembly includes a one-way valve plate and a torsion spring, and a one-way valve port is arranged inside the valve body; one end of the one-way valve plate is hinged to one side of the one-way valve port, and the torsion spring is arranged on the hinged end of the one-way valve plate; the force of the torsion spring on the one-way valve plate drives the one-way valve plate to close the one-way valve port.

3. The anti-leakage water supply valve with a discharge function according to claim 1, characterized in that: The pressure point of the pressure sensor is located within the opening path of the one-way valve plate.

4. The anti-leakage water supply valve with a discharge function according to claim 1, characterized in that: The valve core assembly includes a spherical valve core, a valve stem connected to the spherical valve core, and a driving component for driving the valve stem and the spherical valve core; the execution end is the spherical valve core, and an L-shaped valve core channel is provided in the spherical valve core; the valve core assembly is a three-position three-way valve.

5. A leak-proof water replenishment detection method with a discharge function, characterized in that: It uses the leak-proof water supply valve as described in any one of claims 1 to 4; and adopts the following comparison method: 1) Compare the fluid pressure parameter detected by the pressure sensor with the fluid pressure parameter of the closed circulation system under normal conditions; 2) When the fluid pressure parameter is higher than the normal value, the controller drives the valve core assembly to operate and close the medium replenishment channel and the medium discharge channel; 3) When the fluid pressure parameter is lower than the normal value, the controller drives the valve core assembly to connect the medium replenishment channel to replenish the medium from the outside; if the fluid pressure parameter is restored, the medium replenishment this time is considered normal; If too much medium is added or the sensor value does not return to normal, the controller drives the valve core assembly to connect the medium replenishment channel and monitor the measured value of the pressure sensor. If it is continuously lower than the normal value, it is judged as a leak; 4) When there is a leak, the controller distinguishes between large leaks and small leaks based on the data from the flow sensor; 5) When there is a leakage, the controller starts the valve core assembly, gives a fault contact signal and triggers an alarm; 6) Based on the judgment in step 4), when there is a large leakage, the controller starts the ball valve assembly to connect the medium discharge channel and discharge the system medium into the external space or the reserved collection device in time; 7) When a small leak occurs in the system, the controller sends out an alarm. However, after checking, the user cannot find the leak point and confirm that the leak has not caused intolerable losses. The user can press the "fault tolerance button" and the intelligent anti-leak water supply valve will ignore the small leak and allow the system to work normally.

6. A leak-proof water replenishment detection method with a discharge function, characterized in that: It uses the leak-proof water supply valve as described in any one of claims 1 to 4; and adopts the following comparison method: 1) When the controller drives the valve core assembly to connect the medium replenishment channel; the flow sensor measures the flow parameter of the replenishment medium, and the controller compares the flow parameter obtained by the above measurement with the flow parameter control value under normal state; 2) When the measured flow parameters are within the flow parameter control value under normal conditions, it is judged to be normal; 3) When the measured flow parameter exceeds the flow parameter control value under normal conditions, the controller drives the ball valve assembly to connect the medium replenishment channel; Compare the fluid pressure parameter detected by the pressure sensor with the fluid pressure parameter of the closed circulation system under normal conditions; if the fluid pressure parameter is continuously lower than the normal value, it is determined to be a leak; if the fluid pressure parameter returns to within the normal value range, it is determined that the system is still normal; 4) When there is a leak, the controller distinguishes between large leaks and small leaks based on the flow parameters of the flow sensor; 5) When there is a leakage, the controller starts the valve core assembly, gives a fault contact signal and triggers an alarm; 6) Based on the judgment in step 4), when there is a large leakage, the controller starts the ball valve assembly to connect the medium discharge channel and discharge the system medium into the external space or the reserved collection device in time; 7) When a small leak occurs in the system, the controller sends out an alarm. However, after checking, the user cannot find the leak point and confirm that the leak has not caused intolerable losses. The user can press the "fault tolerance button" and the intelligent anti-leak water supply valve will ignore the small leak and allow the system to work normally.

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