Fluid valve and fluid supply system

Abstract

A fluid valve and a fluid supply system comprising the fluid valve. The fluid valve comprises: a valve body; an elastic device; a valve core slidably arranged on the valve body in a fluid flowing direction, wherein the elastic device is arranged between the valve core and the valve body, a pressure-receiving surface is formed on a liquid inlet side of the valve core, and the force on the pressure-receiving surface is opposite to the force exerted by the elastic device on the valve core, and when the valve core slides relative to the valve body in a direction in which a valve port formed between the valve core and the valve body becomes smaller, the elastic deformation amount of the elastic device increases; and a sound monitoring device used for detecting vibration sound generated by the valve core operating within a predetermined flow rate range. The valve core and the elastic device form a simple harmonic vibration. When the flow rate reaches a preset flow rate, the valve core generates corresponding vibration sound, and the vibration sound is detected by the sound monitoring device, thereby achieving a flow monitoring effect, and effectively solving the problem of poor flow rate monitoring performance of existing fluid valves.

Description

Fluid valves and fluid supply systems

[0001] This application claims priority to Chinese Patent Application No. 202422719430.0, filed on November 7, 2024, entitled "Fluid Valve and Fluid Supply System", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This invention relates to the field of fluid system technology, and more specifically, to a fluid valve, and also to a fluid supply system including the above-described fluid valve. Background Technology

[0003] In industrial practices spanning numerous fields, including aerospace, electronic information technology, transportation equipment manufacturing, new energy applications, rail transit air conditioning systems, central temperature control facilities, energy storage temperature control solutions, liquid cooling and electronic heat dissipation, cabinet air conditioning units, data center integration services, cold chain temperature control technology, and indoor air quality control, hydraulic valves play a crucial role as key components. Their core function lies in precisely controlling the flow and pressure of fluids, thereby achieving precise temperature management to meet the specific needs of various industries.

[0004] Flow measurement is considered a core element for ensuring stable system operation and performance optimization in hydraulic systems and fluid transmission. Traditionally, technologies such as orifice plates, vortex flow meters, turbine flow meters, electromagnetic flow meters, rotor flow meters, ultrasonic flow meters, and elliptical gear flow meters, while providing basic measurement accuracy, are each limited by specific conditions. For example, some flow meters require fluids to have specific properties, such as conductivity and purity; others may reduce fluid transport efficiency due to significant pressure drops during the measurement process. In addition, these devices are often complex in construction and expensive, and the applicability of existing flow meters is limited when dealing with corrosive, conductive, or high-viscosity fluids, which may lead to measurement inaccuracies or hardware damage.

[0005] In the process of realizing this invention, the inventors discovered at least the following problems in the prior art: the current fluid valve flow monitoring effect is not good. Summary of the Invention

[0006] In view of this, the first objective of the present invention is to provide a fluid valve that can effectively solve the problem of poor flow monitoring performance of current fluid valves, and the second objective of the present invention is to provide a fluid supply system including the above-mentioned fluid valve.

[0007] To achieve the first objective mentioned above, the present invention provides the following technical solution:

[0008] A fluid valve, comprising:

[0009] Valve body;

[0010] Elastic device;

[0011] A valve core is slidably disposed on the valve body along the fluid flow direction. An elastic device is disposed between the valve core and the valve body. The inlet side of the valve core forms a pressure-bearing surface, and the force on the pressure-bearing surface is opposite to the force exerted by the elastic device on the valve core. When the valve core slides relative to the valve body in a direction that reduces the valve opening formed between them, the elastic deformation of the elastic device increases.

[0012] A sound monitoring device is used to identify the vibration sound generated by the valve core within a predetermined flow range.

[0013] In use, firstly, based on the monitored flow range, select a fluid valve whose valve core mass and elastic coefficient meet the preset vibration requirements, ensuring that the fluid generates corresponding vibration sounds when it reaches the preset flow range. Then, a sound monitoring device monitors the valve core, primarily detecting the presence of corresponding vibration sounds. If the flow rate reaches the preset range, the sound monitoring device will detect the corresponding vibration sound, facilitating further judgment on whether the flow rate has reached the preset range. In this fluid valve, the valve core is impacted by the fluid in a direction opposite to the elastic device's action, resulting in simple harmonic vibration. When the flow rate reaches the preset range, the designed vibration frequency and / or amplitude are achieved, generating corresponding vibration sounds from the valve core. These vibration sounds are simultaneously detected by the sound monitoring device to monitor whether the fluid valve inlet side has reached the preset flow rate. This achieves effective flow monitoring with a simple structure. In summary, the above fluid valve effectively solves the problem of poor flow monitoring performance in current fluid valves.

[0014] In some technical solutions, a controller is also included, which is connected to the sound monitoring device to obtain the vibration sound signal acquired by the sound monitoring device. The controller can obtain the sound pressure and / or frequency based on the vibration sound signal, and can obtain the flow rate based on the sound pressure and / or the frequency.

[0015] In some technical solutions, the valve body is provided with a first limiting structure to prevent the valve core from moving further when it moves to the valve port opening at a preset maximum opening degree and comes into contact with the valve core, and the elastic device is in an elastic deformation state.

[0016] In some technical solutions, the valve body is provided with a second limiting structure to prevent the valve core from moving further when the valve core moves to the valve port opening degree of a preset minimum opening degree and abuts against the valve core.

[0017] In some technical solutions, the pressure-bearing surface is stepped.

[0018] In some technical solutions, the valve body includes a flow cavity and a valve disc located at the center of the flow cavity. The valve core is slidably installed in the flow cavity, and a through valve hole is formed in the middle of the valve core. When the valve core moves to the valve port at the preset minimum opening degree, the valve disc extends into the valve hole. When the valve core moves to the valve port at the preset maximum opening degree, the valve disc disengages from the valve hole.

[0019] In some technical solutions, the end of the valve disc facing the fluid forms a convex arc surface; the end of the valve hole facing the fluid forms a chamfered arc structure.

[0020] In some technical solutions, the valve core includes a limiting protrusion, and the first limiting structure and the second limiting structure are both limiting shoulders, which are used to limit the limiting protrusion in opposite directions respectively.

[0021] In some technical solutions, the valve core has an inner shoulder surface facing the opposite direction to the pressure-bearing surface, and the elastic device is a compression elastic device, with one end inserted into the valve core to abut against the inner shoulder surface, and the other end abutting against the valve body.

[0022] In some technical solutions, the valve core is cylindrical and has an annular inner protrusion on its inner wall, which forms the valve hole; along the fluid flow direction, the rear end of the annular inner protrusion is offset from the rear end face of the valve core and together constitutes the pressure-bearing surface, and the front end of the annular inner protrusion is offset from the front end face of the valve core to form the inner shoulder surface; an annular limiting protrusion is formed on the outer wall of the valve core.

[0023] To achieve the second objective mentioned above, the present invention also provides a fluid supply system comprising any of the aforementioned fluid valves, including a filter, a pressure vessel, a drive pump, a heat exchanger, and a heater arranged sequentially along the fluid flow direction, wherein the fluid valve is located on the inlet side of the filter. Since the aforementioned fluid valve possesses the aforementioned technical effects, the fluid supply system having this fluid valve should also possess corresponding technical effects. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 is a side view of the fluid valve provided in an embodiment of the present invention;

[0026] Figure 2 is a schematic cross-sectional view of the fluid valve in Figure 1 along the AA direction when the valve core is in the first position;

[0027] Figure 3 is a schematic cross-sectional view of the fluid valve in Figure 1 along the AA direction when the valve core is in the second position;

[0028] Figure 4 is a schematic cross-sectional view of the valve body provided in an embodiment of the present invention;

[0029] Figure 5 is a three-dimensional schematic diagram of the valve body provided in an embodiment of the present invention;

[0030] Figure 6 is a schematic cross-sectional view of the valve core provided in an embodiment of the present invention;

[0031] Figure 7 is a rear view of the valve core provided in an embodiment of the present invention;

[0032] Figure 8 is a three-dimensional schematic diagram of the fluid valve provided in an embodiment of the present invention;

[0033] Figure 9 is a schematic diagram of the connection of the fluid supply system provided in an embodiment of the present invention.

[0034] The following components are labeled in the attached diagram: fluid valve 100, filter 200, pressure vessel 300, drive pump 400, heat exchanger 500, heater 600, compressor 700, condenser 800; valve body 1, elastic device 2, valve core 3, sound monitoring device 4, valve port 5; valve body 11, annular end cap 12, valve disc 13, connecting rod 14, inner convex structure 15, crossbar 16, flow cavity 17, first mating hole 111, second mating hole 112, third mating hole 113, second limiting structure 114, first limiting structure 121, arc convex surface 131; pressure-bearing surface 31, first hole section 32, second hole section 33, limiting protrusion 34, inner shoulder surface 35, annular inner protrusion 36, outer cylinder wall 37, valve hole 361, arc chamfer structure 362. Detailed Implementation

[0035] This invention discloses a fluid valve to effectively solve the problem of poor flow monitoring performance of current fluid valves.

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Please refer to Figures 1-9. Figure 1 is a side view of the fluid valve provided in an embodiment of the present invention; Figure 2 is a cross-sectional view of the fluid valve in Figure 1 with the valve core in the first position along the AA direction; Figure 3 is a cross-sectional view of the fluid valve in Figure 1 with the valve core in the second position along the AA direction; Figure 4 is a cross-sectional view of the valve body provided in an embodiment of the present invention; Figure 5 is a three-dimensional view of the valve body provided in an embodiment of the present invention; Figure 6 is a cross-sectional view of the valve core provided in an embodiment of the present invention; Figure 7 is a rear view of the valve core provided in an embodiment of the present invention; Figure 8 is a three-dimensional view of the fluid valve provided in an embodiment of the present invention; Figure 9 is a connection diagram of the fluid supply system provided in an embodiment of the present invention.

[0038] In some embodiments, a fluid valve 100 is provided, which can be a hydraulic valve or a fluid valve 100. Specifically, the fluid valve includes: a valve body 1, an elastic device 2, a valve core 3, and a sound monitoring device 4. It should be noted that, for better illustration of the structural relationships of this application, the direction of fluid flow is considered forward, and the opposite direction is considered backward. When the fluid flows in a tortuous manner, the direction of the fluid flow path is considered forward.

[0039] The valve core 3 is slidably mounted on the valve body 1 along the fluid flow direction, forming a valve port 5 between the valve core 3 and the valve body 1. The size of the valve port 5 is adjusted by the valve core 3 sliding relative to the valve body 1 along the fluid flow direction; the size of the valve port 5 is generally measured by its opening degree. In the fluid valve, when the valve core 3 slides to the first position relative to the valve body 1 along the fluid flow direction, the valve port 5 is in the open state, and the opening degree is generally at its maximum. When the valve core 3 slides to the second position relative to the valve body 1 along the fluid flow direction, the valve port 5 is in the minimum state, and the opening degree is generally at its minimum, thus it can be considered a closed state (not completely closed), but fluid can still pass through. The movement of the valve core 3 from the first position to the second position is generally in the direction of fluid flow, while the movement of the valve core 3 from the second position to the first position is generally against the direction of fluid flow. Generally, when the valve core 3 slides relative to the valve body 1 along the fluid flow direction to narrow the valve port 5, the valve core 3 is sliding along the fluid flow direction.

[0040] An elastic device 2 is provided between the valve core 3 and the valve body 1. When the valve core 3 slides relative to the valve body 1 in a direction that narrows the valve opening 5 between them, the elastic deformation of the elastic device 2 increases. That is, when the valve core 3 slides relative to the valve body 1 along the fluid flow direction to narrow the valve opening 5, the elastic device 2 prevents the valve core 3 from moving in that direction. In other words, as the valve core 3 moves in the direction of narrowing the valve opening 5, the elastic device 2 gradually stores energy. The elastic device 2 can be a compression elastic device, in which case it is gradually compressed and undergoes compressive deformation as the valve core 3 moves in the direction of narrowing the valve opening 5; or it can be a tension elastic device, in which case it is gradually stretched and undergoes tensile deformation as the valve core 3 moves in the direction of narrowing the valve opening 5.

[0041] The inlet side of the valve core 3 forms a pressure-bearing surface 31, where the inlet side, also known as the liquid-facing side, faces in the opposite direction to the fluid flow direction, so that the fluid impacts the pressure-bearing surface 31 and bears pressure. Furthermore, the force on the pressure-bearing surface 31 is opposite to the force exerted by the elastic device 2 on the valve core 3. The pressure-bearing surface 31 is subjected to the impact force of the fluid flow, and the direction of this force is consistent with the fluid flow direction. The force exerted by the elastic device 2 on the valve core 3 is against the fluid flow direction, thus preventing the valve core 3 from sliding along the fluid flow direction.

[0042] This means that during operation, when the fluid exerts a large impact force on the pressure surface 31, it drives the valve core 3 to move, causing the elastic device 2 to deform elastically. At this point, the valve core 3 and the elastic device 2 will form a simple harmonic vibration. Research has shown that at a certain vibration frequency, a noticeable vibration sound will occur at the valve core 3. There are at least two possible scenarios for this vibration sound: one is that the vibration frequency of the simple harmonic vibration matches the natural frequency of the valve core 3, in which case sound will be generated; the other is that when the vibration frequency of the simple harmonic vibration reaches a certain range, the frictional sound between the valve core 3 and the valve body 1 will increase to a identifiable level, or the sound generated by the force between the valve core 3 and the fluid will increase to a identifiable level. That is, this vibration sound changes with the fluid flow rate, such as changes in amplitude and / or frequency, with frequency changes generally being the primary identifiable factor. At a preset flow rate, achieving the designed vibration frequency and / or amplitude can be achieved by adjusting the mass of the valve core 3 and the elastic coefficient of the elastic device 2 accordingly. Therefore, by changing the mass of the valve core 3 and / or the elastic coefficient of the elastic device 2, the amplitude and / or frequency of the aforementioned simple harmonic vibration can reach a preset value at the preset flow rate, making it detectable by the sound monitoring device or the human ear. When monitoring whether the fluid has reached the preset flow rate, a corresponding sound will be generated when the fluid reaches the preset flow rate, and this sound can be identified. Therefore, when the corresponding sound is identified, it indicates that the fluid has reached the preset flow rate. It should be noted that the vibration sound is generated at the valve core 3, but it is not necessarily emitted by the valve core 3; it may also be from the fluid at the valve core 3, or from the corresponding part of the valve body 1 at the valve core 3.

[0043] In some embodiments, a sound monitoring device 4 may be further provided to identify vibration sounds generated at the valve core 3 within a predetermined flow range. That is, when the flow rate at the valve core 3 reaches a preset flow rate, a corresponding vibration sound will be generated, and this vibration sound can be detected by the sound monitoring device. When the sound monitoring device detects the corresponding vibration sound, it indicates that the flow rate at the valve core 3 has reached the preset flow rate, thus completing the monitoring. The sound monitoring device 4 may specifically be a sound sensor.

[0044] In some embodiments, during use, a fluid valve is first selected based on the monitored flow range, ensuring that the mass of the valve core 3 and the elastic coefficient of the elastic device 2 meet the preset vibration requirements. This ensures that when the fluid reaches the preset flow range, a corresponding vibration sound is generated. Then, a sound monitoring device monitors the valve core 3 of the fluid valve, primarily detecting whether a corresponding vibration sound is heard at the valve core 3. If the flow rate reaches the preset flow rate, the sound monitoring device can detect the corresponding vibration sound, facilitating further judgment on whether the flow rate has reached the preset flow rate. In the above fluid valve, the valve core 3 is impacted by the fluid, and the impact direction is opposite to the action direction of the elastic device 2, resulting in simple harmonic vibration. When the flow rate reaches the preset flow rate, the designed vibration frequency and / or vibration amplitude are formed, at which point the valve core 3 generates a corresponding vibration sound. Simultaneously, the vibration sound is monitored by the sound monitoring device to check whether the preset flow rate has been reached at the fluid valve inlet side. This achieves effective flow monitoring and has a simple structure. In summary, the above fluid valve effectively solves the problem of poor flow monitoring performance in current fluid valves.

[0045] In some embodiments, a controller is also included, wherein the controller is connected to the sound monitoring device 4 to obtain the vibration sound signal obtained by the sound monitoring device 4, and the controller is able to obtain the sound pressure and / or frequency based on the vibration sound signal, and is able to obtain the flow rate based on the sound pressure and / or frequency.

[0046] In some embodiments, the specific steps of the entire signal processing are as follows: A sound signal acquisition step, where the sound monitoring device 4 acquires the sound source signal; a signal preprocessing step, where the controller performs filtering, noise reduction, and other processing on the acquired sound signal to reduce environmental interference; a Fourier transform step, where the controller performs a Fourier transform on the preprocessed sound signal to obtain the spectrum; a spectrum analysis step, where the controller extracts sound pressure and frequency information from the spectrum; and a flow calculation step, where the controller calculates the real-time flow rate based on the sound pressure and frequency. Alternatively, other methods can be used to process the detected sound signal to obtain the final result. Through the above steps, real-time monitoring of fluid flow rate can be achieved, ensuring the safe and stable operation of the system.

[0047] In some embodiments, the valve body 1 is provided with a first limiting structure 121 to prevent the valve core 3 from continuing to move in the reverse direction of the fluid flow when it abuts against the valve core 3 when the valve port 5 opens to a preset maximum opening. The elastic device 2 is in an elastic deformation state. When the elastic device 2 pushes the valve core 3 to slide in the direction of fluid flow, that is, to slide in the direction of increasing valve port 5, the valve core 3 is limited by the first limiting structure 121 when it moves to the first position or exceeds the first position, and cannot continue to move, so as to maintain the current position state. At this time, the elastic device 2 can reach a natural extension state or not reach a natural extension state. The former can better realize simple harmonic vibration, and the latter can realize pre-tightening to prevent the valve core 3 from sliding arbitrarily.

[0048] In some embodiments, the valve body 1 is provided with a second limiting structure 114 to prevent the valve core 3 from continuing to move when it abuts against the valve core 3 when the valve port 5 is opened to a preset minimum opening. At this time, it is preferable that the elastic device 2 has not reached its maximum deformation. The second limiting structure 114 can prevent the elastic device 2 from reaching its maximum deformation, thereby better protecting the elastic device 2.

[0049] It should be noted that for the first limiting structure 121 and the second limiting structure 114, a limiting shoulder or a limiting protrusion 34 can be used. The specific limiting method can be set according to the needs.

[0050] In some embodiments, the pressure-bearing surface 31 can be stepped, that is, the pressure-bearing surfaces 31 are not located on the same cross section, but are staggered in the direction of fluid flow so that the radial component of the pressure-bearing surface 31 can be distributed in a staggered manner so as to help to cancel each other out and make the valve core 3 slide more smoothly.

[0051] In some embodiments, the valve body 1 may include a flow cavity 17 and a valve disc 13 located at the center of the flow cavity 17, wherein the valve core 3 is slidably mounted in the flow cavity 17, so that it can slide relative to the valve body 1 in the direction of fluid flow. A through valve hole 361 is formed in the middle of the valve core 3. When the valve core 3 moves to the valve port 5 at a preset minimum opening, the valve disc 13 extends into the valve hole 361, forming a small gap between them. When the valve core 3 moves to the valve port 5 at a preset maximum opening, the valve disc 13 disengages from the valve hole 361. By adjusting the relative position of the valve disc 13 relative to the valve hole 361 in the direction of fluid flow, the valve port 5 changes. This method of change is relatively simple and easy to operate. Alternatively, the configuration can be reversed, in which case the valve body 1 is provided with the valve hole 361, and the valve disc 13 is integrated into the valve core 3 device.

[0052] In some embodiments, the end of the valve disc 13 facing the fluid forms an arcuate convex surface 131, that is, the liquid inlet side of the valve disc 13 forms an arcuate convex surface 131 to face the fluid, so as to facilitate the diversion of the fluid.

[0053] In some embodiments, the end of the valve orifice 361 facing the fluid inlet may be formed with a rounded chamfer structure 362, that is, the fluid inlet side of the valve orifice 361 is formed with a rounded chamfer structure 362, so as to guide the fluid to flow into the orifice.

[0054] In some embodiments, the fluid outlet end of the valve orifice 361 may be configured to form a flared structure, i.e., gradually expand along the fluid flow direction, to match the arcuate convex surface 131.

[0055] In some embodiments, the valve core 3 may include a limiting protrusion 34, and the first limiting structure 121 and the second limiting structure 114 are both limiting shoulders, which are used to limit the limiting protrusion 34 in opposite directions, so that the limiting is convenient and simple.

[0056] In some embodiments, the valve core 3 may have an inner shoulder surface 35 facing the opposite direction to the pressure surface 31, and the elastic device 2 is a compression elastic device 2, with one end inserted into the valve core 3 to abut against the inner shoulder surface 35, and the other end abutting against the valve body 1, so that the elastic device 2 can be extended into the valve core 3, so that the elastic device 2 can be extended to a greater extent, and the elastic device 2 can be extended to a greater extent, while the size of the valve body 1 in the fluid flow direction can be reduced.

[0057] In some embodiments, the valve core 3 can be cylindrical with an annular inner protrusion 36 on its inner wall. The annular inner protrusion 36 forms a valve hole 361, and is generally located in the middle. Along the fluid flow direction, the rear end of the annular inner protrusion 36 is offset from the rear end face of the valve core 3 and together forms a pressure-bearing surface 31, i.e., the rear end of the annular inner protrusion 36 is in front of the rear end face of the valve core 3. The front end of the annular inner protrusion 36 is offset from the front end face of the valve core 3 to form an inner shoulder surface 35, i.e., the front end of the annular inner protrusion 36 is behind the front end face of the valve core 3. That is, a first hole segment 32, a valve hole 361, and a second hole end are formed inside the valve core 3 along the fluid flow direction. The elastic device 2 is inserted into the second hole segment 33 to abut against the inner end face. The rear end of the annular inner protrusion 36 is offset from the rear end face of the valve core 3, i.e., forming a stepped structure. Because of the offset arrangement, the first hole segment 32 is formed. Generally, the inner diameters of the first orifice 32 and the second orifice 33 are both larger than the inner diameter of the valve orifice 361. Generally, the inner diameter of the first orifice 32 is smaller than that of the second orifice 33, so that the valve opening 5 can reach its maximum.

[0058] An annular limiting protrusion 34 is formed on the outer wall of the valve core 3. The limiting protrusion 34 is preferably located on the outer side of the inlet end of the valve core 3, that is, the outer diameter of the limiting protrusion 34 is larger than the outer diameter of the outer wall of the valve core 3. Generally speaking, the span of the limiting protrusion 34 in the flow direction is relatively small, even smaller than the span of the first orifice section 32. It should be noted that although some parts use "outer diameter" and "inner diameter", these mainly refer to the lateral dimensions and do not necessarily mean that it is a circular structure. Other structures are also possible. Generally speaking, a circular structure can be used in the corresponding positions.

[0059] The valve body 1 includes a valve body 11 and an annular end cap 12. The valve body 11 has a first mating hole 111, a second mating hole 112, and a third mating hole 113 arranged sequentially along the fluid flow direction. The annular end cap 12 is embedded in the first mating hole 111, and generally the dimensions are consistent and aligned in the fluid flow direction. The inner diameter of the annular end cap 12 is smaller than the inner diameter of the second mating hole 112. In this case, the part of the front side of the annular end cap 12 protruding from the second mating hole 112 forms a first limiting structure 121. The outer diameter of the second mating hole 112 matches the outer diameter of the limiting protrusion 34. The diameter of the third mating hole 113 is smaller than the diameter of the second mating hole 112, so as to form a second limiting structure 114 at the connection. The outer cylinder wall 37 of the valve core 3 is fitted with the third mating hole 113. The front end of the third mating hole 113 forms an inward protrusion structure 15. One end of the elastic device 2 abuts against the inward protrusion structure 15, and the other end abuts against the inner shoulder surface 35. The valve disc 13 has a forward-extending connecting rod portion 14 on its front side. The front end of the connecting rod portion 14 is connected to the inner convex structure 15 through two or more crossbar portions 16. Both the connecting rod portion 14 and the crossbar portions 16 are flat rods, and their flatness and narrowness are consistent. The valve disc 13, the connecting rod portion 14, the crossbar portions 16, and the valve body 11 are integrally formed and connected. During assembly, the valve core 3 is inserted from the rear end of the valve body 11, and then inserted into the annular end cap 12 and enters the first mating hole 111. The first mating hole 111, the second mating hole 112, and the third mating hole 113 are preferably cylindrical holes.

[0060] In some embodiments, the hydraulic valve's on / off design covers the full range to adapt to different operating conditions. The flow detection function is based on a finely designed flow detection range to ensure the valve operates under safe parameters. The flow detection range is set equal to the permissible safe operating flow rate Q. When the fluid flow rate exceeds the designed safe operating fluid threshold, i.e., Q > Qmax, the valve core 3 will be excited by the fluid and generate high-frequency vibrations, which will be accompanied by sound. At this time, the flow detection system can identify a signal exceeding the design threshold, i.e., Q > Qmax.

[0061] The vibration of valve core 3 is caused by hydrodynamics. When the vibration reaches the designed flow detection threshold, the sound generated by the high-frequency vibration of valve core 3 can be used as a flow monitoring signal. Specifically, the directly detected vibration sound signal can be analyzed by Fourier transform to obtain the frequency and sound pressure information of the sound signal. This process can be figuratively described as "distinguishing flow by sound," that is, identifying the flow state of the fluid through the characteristics of the sound, thereby achieving real-time monitoring of the fluid flow.

[0062] Within the flow detection range, when the flow rate Q equals the designed safe operating flow rate, the high-frequency vibration of valve core 3 will stop, and the sound signal will also disappear, indicating that the current flow rate is within the safe operating range. This design not only improves the accuracy of flow monitoring but also ensures the stable operation of the hydraulic system.

[0063] In some embodiments, the fluid valve may be a built-in flow detection device or an external flow detection device.

[0064] The built-in flow detection devices include: In-system flow monitoring, which can be integrated into the hydraulic system and flexibly placed at the system inlet or outlet according to monitoring needs. This design allows for real-time monitoring of system flow, ensuring optimal system operation; and multi-device flow monitoring, which can simultaneously monitor the flow of multiple key components in the system. Users can place the detection devices before or after these components as needed to obtain comprehensive flow data.

[0065] The external flow detection device offers several advantages: Cross-system flow monitoring allows for independent installation on multiple different or identical systems, enabling centralized monitoring and management of flow across multiple systems; a single device for multi-system control allows for flow control of multiple identical or different systems through a single external flow detection device. This design improves monitoring efficiency while reducing the need for internal system space.

[0066] In some embodiments, the process of flow and pressure regulation by the hydraulic valve is as follows: fluid flows from the inlet to the outlet of the valve. Initially, the fluid flow and pressure act on the valve core 3, and then the valve core 3 is driven to undergo elastic deformation by a compression spring. The compression spring has a passive balancing characteristic, which varies depending on the spring parameters, thereby achieving regulation of different flow rates, pressures, and different system operating conditions. This device is based on passive flow control, utilizing the balancing force of the compression spring, and has the ability to balance flow with nonlinear pressure drop, thus controlling changes in flow and pressure. As the flow rate increases, the pressure drop also increases; as the flow rate decreases, the pressure drop also decreases. This device can be installed at different locations in the branch circuit or inside or outside the system to passively control flow distribution, making the flow distribution more uniform.

[0067] The hydraulic valve has two states. In the first state, the valve is fully open, allowing maximum flow, and the compression spring does not need to balance the pressure. In the second state, the valve is closed, allowing only minimum flow, and the compression spring undergoes elastic deformation. The design ensures that the valve core 3 will not pass through the central valve disc 13, and when the flow and pressure decrease, the spring will return to its original shape.

[0068] Based on the fluid valves provided in the above embodiments, the present invention also provides a fluid supply system. This fluid supply system includes any one of the fluid valves described in the above embodiments, comprising a filter 200, a pressure vessel 300, a drive pump 400, a heat exchange device 500, and a heater 600 arranged sequentially along the fluid flow direction. The fluid valve is located on the inlet side of the filter 200. Since this fluid supply system uses the fluid valves described in the above embodiments, the beneficial effects of this fluid supply system are explained in the above embodiments.

[0069] The general heat exchange device 500 includes two heat exchange channels that exchange heat with each other. One heat exchange channel is connected in series between the drive pump 400 and the heater 600, and the other heat exchange channel is connected in sequence to the compressor 700 and the condenser 800 to serve as an evaporator.

[0070] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0071] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fluid valve, characterized in that, include: Valve body (1); Elastic device (2); The valve core (3) is slidably disposed on the valve body (1) along the fluid flow direction. The elastic device (2) is disposed between the valve core (3) and the valve body (1). The inlet side of the valve core (3) forms a pressure surface (31), and the force on the pressure surface (31) is opposite to the force exerted by the elastic device (2) on the valve core (3). When the valve core (3) slides relative to the valve body (1) in a direction that makes the valve opening (5) formed between them smaller, the elastic deformation of the elastic device (2) increases. A sound monitoring device (4) is used to identify the vibration sound generated by the valve core (3) within a predetermined flow range.

2. The fluid valve according to claim 1, characterized in that, It also includes a controller, which is connected to the sound monitoring device (4) to obtain the vibration sound signal obtained by the sound monitoring device (4). The controller is able to obtain the sound pressure and / or frequency based on the vibration sound signal, and is able to obtain the flow rate based on the sound pressure and / or the frequency.

3. The fluid valve according to any one of claims 1-2, characterized in that, The valve body (1) is provided with a first limiting structure (121) to prevent the valve core (3) from continuing to move when the valve core (3) moves to the valve port (5) opening to the preset maximum opening degree and abuts against the valve core (3), and the elastic device (2) is in an elastic deformation state.

4. The fluid valve according to claim 3, characterized in that, The valve body (1) is provided with a second limiting structure (114) to prevent the valve core (3) from continuing to move when the valve core (3) moves to the valve port (5) opening to the preset minimum opening degree and abuts against the valve core (3).

5. The fluid valve according to claim 4, characterized in that, The pressure surface (31) is stepped.

6. The fluid valve according to claim 5, characterized in that, The valve body (1) includes a flow chamber (17) and a valve disc (13) located at the center of the flow chamber (17). The valve core (3) is slidably installed in the flow chamber (17). A through valve hole (361) is formed in the middle of the valve core (3). When the valve core (3) moves to the valve port (5) at the preset minimum opening degree, the valve disc (13) extends into the valve hole (361). When the valve core (3) moves to the valve port (5) at the preset maximum opening degree, the valve disc (13) disengages from the valve hole (361).

7. The fluid valve according to claim 6, characterized in that, The valve disc (13) has a convex arc surface (131) at the end facing the fluid; the valve hole (361) has a chamfered arc structure (362) at the end facing the fluid.

8. The fluid valve according to claim 6, characterized in that, The valve core (3) includes a limiting protrusion (34), and the first limiting structure (121) and the second limiting structure (114) are both limiting shoulders, which are used to limit the limiting protrusion (34) in opposite directions respectively.

9. The fluid valve according to claim 8, characterized in that, The valve core (3) has an inner shoulder surface (35) facing the opposite direction to the pressure surface (31). The elastic device (2) is a compression elastic device, with one end inserted into the valve core (3) to abut against the inner shoulder surface (35), and the other end abutting against the valve body (1).

10. The fluid valve according to claim 9, characterized in that, The valve core (3) is cylindrical and has an annular inner protrusion (36) on its inner wall. The annular inner protrusion (36) forms the valve hole (361). Along the fluid flow direction, the rear end of the annular inner protrusion (36) is offset from the rear end face of the valve core (3) and together they form the pressure surface (31). The front end of the annular inner protrusion (36) is offset from the front end face of the valve core (3) to form the inner shoulder surface (35). The annular limiting protrusion (34) is formed on the outer wall of the valve core (3).

11. A fluid supply system comprising a filter (200), a pressure vessel (300), a drive pump (400), a heat exchanger (500), and a heater (600) arranged sequentially along the fluid flow direction, characterized in that, It also includes a fluid valve (100) as described in any one of claims 1-10, the fluid valve (100) being disposed on the inlet side of the filter (200).

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