Heat supply flow regulating valve and control method

Abstract

The invention provides a heat supply flow regulating valve and a control method. The heat supply flow regulating valve comprises a valve body, a flow regulating unit, a driving device, an angle sensor, a first temperature monitoring unit and a second temperature monitoring unit. A valve cavity is formed in the valve body, and a fluid inlet and a fluid outlet which are communicated with the valve cavity are formed in the valve body; the flow adjusting unit comprises a valve rod, the valve rod is rotationally assembled on the valve body, and the valve opening degree can be adjusted in the rotating process so as to adjust the fluid through-flow area. The driving device is used for driving the valve rod to rotate; the angle sensor is used for monitoring the rotation angle of the valve rod; the first temperature monitoring unit is used for monitoring water temperature of a water supply side; the second temperature monitoring unit is used for monitoring the water temperature of the backwater side. According to the heat supply flow regulating valve and the control method, the opening degree of the valve can be accurately controlled according to the actual indoor temperature of a user.

Description

Technical Field

[0001] This invention relates to the field of heating flow control technology, and in particular to a flow regulating valve and control method for heating. Background Technology

[0002] The existing flow control valves for heating operate on the principle of using an electric actuator to drive the valve core, thereby adjusting the valve opening and precisely controlling the flow area of ​​the heat medium to regulate the heating output. However, existing flow control valves for heating struggle to accurately control the valve opening based on the real-time indoor temperature, leading to energy waste or reduced comfort. Summary of the Invention

[0003] This invention provides a flow regulating valve and control method for heating, which can accurately control the valve opening according to the actual indoor temperature of the user.

[0004] The present invention provides a flow regulating valve for heating, comprising: a valve body, a flow regulating unit, a driving device, an angle sensor, a first temperature monitoring unit, and a second temperature monitoring unit.

[0005] The valve body has a valve cavity, and the valve body has a fluid inlet and a fluid outlet that communicate with the valve cavity; the flow regulation unit includes a valve stem, which is rotatably mounted on the valve body and can adjust the valve opening to adjust the fluid flow area during rotation; a drive device is used to drive the valve stem to rotate; an angle sensor is used to monitor the rotation angle of the valve stem; a first temperature monitoring unit is used to monitor the water temperature on the supply side; and a second temperature monitoring unit is used to monitor the water temperature on the return side.

[0006] In one embodiment of the present invention, the flow regulating unit includes a first valve plate and a second valve plate. The first valve plate is located in the valve cavity and is used to block the flow between the fluid inlet and the fluid outlet. The valve stem is rotatably mounted on the first valve plate. The first valve plate is provided with a flow regulating window extending along the rotation direction of the valve stem. The second valve plate is coaxially fixed on the valve stem and rotatably engages with the end face of the first valve plate. The rotation of the valve stem drives the second valve plate to rotate to completely or partially cover the flow regulating window, thereby adjusting the opening size of the flow regulating window and thus adjusting the valve opening. The heating fluid flows out from the fluid outlet in sequence through the fluid inlet, the valve cavity and the flow regulating window.

[0007] In one embodiment of the present invention, the flow regulating unit further includes a fixed connector, the fixed connector including a body part, the body part having a plug hole, the end of the valve stem having a plug section passing through the plug hole, a first anti-rotation structure cooperating with the plug hole and the plug section, and a second anti-rotation structure cooperating with the body part and the second valve plate.

[0008] In one embodiment of the present invention, a first anti-rotation plane is provided in the insertion hole, and a second anti-rotation plane that cooperates with the first anti-rotation plane is provided on the insertion section. The first anti-rotation plane and the second anti-rotation plane constitute a first anti-rotation structure.

[0009] In one embodiment of the present invention, the insertion hole includes a small diameter hole near the first valve plate and a large diameter hole away from the first valve plate. The junction of the large diameter hole and the small diameter hole forms a first stop surface. The first anti-rotation plane includes a first straight surface located in the small diameter hole and a first inclined surface located in the large diameter hole. The first inclined surface causes the large diameter hole to gradually narrow towards the first valve plate.

[0010] The insertion section includes a small-diameter section that mates with the small-diameter hole and a large-diameter section that mates with the large-diameter hole. The junction of the large-diameter section and the small-diameter section forms a second stop surface that mates with the first stop surface. The second anti-rotation plane includes a second straight surface on the small-diameter section that mates with the first straight surface and a second inclined surface on the large-diameter section that mates with the first inclined surface. The second inclined surface causes the large-diameter section to gradually narrow towards the first valve plate.

[0011] In one embodiment of the present invention, there are two first anti-rotation planes arranged opposite each other, and two second anti-rotation planes arranged opposite each other.

[0012] In one embodiment of the present invention, the main body is provided with an annular boss, the annular boss is provided with a protrusion on the surface opposite to the second valve plate, the second valve plate is provided with a groove, and the protrusion and the groove are interference-fitted to form a second anti-rotation structure.

[0013] In one embodiment of the present invention, the center of the protrusion is provided with an elastic groove for elastically deforming the protrusion. And / or, the number of protrusions is at least four and is spaced circumferentially along the insertion hole, and the number of grooves corresponds to the number of protrusions.

[0014] In one embodiment of the present invention, the driving device includes a geared motor for driving the valve stem to rotate. The end of the valve stem extends out of the geared motor, and an angle sensor is coupled to the extended portion to monitor the rotation angle of the valve stem.

[0015] The present invention also provides a control method for a heating flow regulating valve, used to control the aforementioned heating flow regulating valve, the control method comprising: The water temperature on the supply side monitored by the first temperature monitoring unit and the water temperature on the return side monitored by the second temperature monitoring unit are acquired in real time. The actual indoor temperature of the user is calculated in real time based on the water temperature on the supply side and the water temperature on the return side. The actual indoor temperature satisfies the following formula: Ts=(Tg+Th) / 2-CM / KA (Tg-Th) Ts is the actual indoor temperature, Tg is the water temperature on the supply side, Th is the water temperature on the return side, C is the specific heat capacity, M is the current flow rate from the fluid outlet. Since the angle sensor strictly corresponds to the outlet flow rate, the flow rate value M can be directly obtained from the angle sensor reading. K is the constant heat transfer coefficient, and A is the user's indoor heating area. By comparing the actual indoor temperature with the preset temperature, the selective control drive device drives the valve stem to rotate, thereby adjusting the valve opening of the heating flow regulating valve.

[0016] The beneficial effects of this invention are: The present invention relates to a flow regulating valve and control method for heating applications. The flow regulating valve includes a valve body, a flow regulating unit, a drive device, an angle sensor, a first temperature monitoring unit, and a second temperature monitoring unit. During use, the first and second temperature monitoring units can acquire the supply water temperature and return water temperature in real time. Based on these temperatures, the actual indoor temperature of the user's room is calculated in real time. Then, the drive device is selectively controlled to rotate the valve stem according to the actual indoor temperature, thereby adjusting the valve opening and thus regulating the flow rate from the fluid outlet. During this process, the angle sensor monitors the rotation angle of the valve stem in real time. By precisely adjusting the valve opening, and thus precisely regulating the flow rate from the fluid outlet, this invention achieves refined closed-loop control of the heating flow rate. Compared to existing flow regulating valves for heating, this invention can precisely control the valve opening based on the actual indoor temperature of the user, thereby precisely controlling the flow rate from the fluid outlet. Furthermore, it eliminates the need for an additional indoor temperature sensor to determine the actual indoor temperature, reducing installation costs and deployment complexity. Simultaneously, based on a dynamic adjustment mechanism using real-time temperature feedback, it effectively avoids overheating or underheating, achieving energy-saving operation while ensuring user thermal comfort, and significantly improving the intelligence level and energy efficiency of the heating system. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0018] In the attached diagram: Figure 1 This is a schematic diagram of the overall structure of a flow regulating valve for heating provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the usage state of a flow regulating valve for heating provided in an embodiment of the present invention; Figure 3 Provided for an embodiment of the present invention Figure 1 The diagram shows a cross-sectional view of the flow regulating valve for heating. Figure 4 Provided for an embodiment of the present invention Figure 2 A magnified schematic diagram of the structure at the mid-angle sensor; Figure 5 Provided for an embodiment of the present invention Figure 2 Enlarged structural diagram of the fixed connector in the middle; Figure 6 Provided for an embodiment of the present invention Figure 2 A schematic diagram of the combined structure of the middle valve stem, fixed connector, first valve plate, and second valve plate; Figure 7 Provided for an embodiment of the present invention Figure 6 Schematic diagram of the middle valve stem; Figure 8 Provided for an embodiment of the present invention Figure 7 Enlarged structural diagram of the interlocking section; Figure 9 Provided for an embodiment of the present invention Figure 2 A three-dimensional structural diagram of the fixed connector in the middle; Figure 10 Provided for an embodiment of the present invention Figure 9 A side view of the fixed connector shown. Figure 11 Provided for an embodiment of the present invention Figure 10 A bottom view of the fixed connector shown. Figure 12 Provided for an embodiment of the present invention Figure 2 A schematic diagram of the structure of the first valve plate in the middle; Figure 13 Provided for an embodiment of the present invention Figure 2 A schematic diagram of the structure of the second valve plate in the middle; Figure 14 Provided for an embodiment of the present invention Figure 1 The diagram shows a flow chart of a control method for a heating flow regulating valve that is matched with the heating flow regulating valve.

[0019] The attached figures are labeled as follows: 100. Flow regulating valve for heating; 1. Valve body; 11. Valve chamber; 12. Fluid inlet; 13. Fluid outlet; 2. Flow regulating unit; 21. Valve stem; 211. Insertion section; 2111. Small diameter section; 2112. Large diameter section; 2113. Second stop surface; 212. Second anti-rotation plane; 2121. Second straight surface; 2122. Second inclined surface; 22. First valve plate; 221. Flow regulating window; 23. Second valve plate; 231. Groove; 24. 241. Fixed connector; 242. Insertion hole; 2421. Small diameter hole; 2422. Large diameter hole; 2423. First stop surface; 243. First anti-rotation plane; 2431. First straight surface; 2432. First inclined surface; 243. Annular boss; 244. Protrusion; 2441. Elastic slot; 3. Drive device; 4. Angle sensor; 5. First temperature monitoring unit; 6. Second temperature monitoring unit; 7. Flow balancing mechanism; 8. Display screen. Detailed Implementation

[0020] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0021] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0022] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the invention. However, it will be apparent to those skilled in the art that embodiments of the invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the invention.

[0023] Please see Figures 1 to 13 The present invention provides a flow regulating valve 100 for heating, comprising: valve body 1, flow regulating unit 2, driving device 3, angle sensor 4, first temperature monitoring unit 5, and second temperature monitoring unit 6.

[0024] Please see Figures 1 to 3The valve body 1 has a valve cavity 11 inside, and a fluid inlet 12 and a fluid outlet 13 connected to the valve cavity 11 are provided on the valve body 1. The shape of the valve body 1 can adopt various shapes that are easy for those skilled in the art to imagine, including but not limited to spherical, cylindrical, cubic, ellipsoidal, drum-shaped or irregular structure, and can be adapted according to the layout space of the pipeline, fluid characteristics and installation conditions.

[0025] Please see Figures 3 to 13 The flow regulating unit 2 includes a valve stem 21, which is rotatably mounted on the valve body 1 and can adjust the valve opening to regulate the fluid flow area during rotation. The rotatable assembly can adopt conventional designs in the art, including but not limited to shaft-hole type or bearing type. An angle sensor 4 is used to monitor the rotation angle of the valve stem 21. To achieve valve opening adjustment during valve stem 21 rotation, various structural forms readily conceived by those skilled in the art can be adopted, such as a ball valve structure where the valve stem 21 rotates to drive the ball to rotate, or a gate valve structure where the valve stem 21 directly drives the gate to open and close, etc. However, in this invention... In one embodiment, the flow regulating unit 2 may include a first valve plate 22 and a second valve plate 23. The first valve plate 22 is located in the valve cavity 11 and is used to block the flow between the fluid inlet 12 and the fluid outlet 13. The valve stem 21 is rotatably mounted on the first valve plate 22. The first valve plate 22 is provided with a flow regulating window 221 (specifically, a fan-shaped slot) extending along the rotation direction of the valve stem 21. The second valve plate 23 is coaxially fixed on the valve stem 21 and rotates with the end face of the first valve plate 22. The rotation of the valve stem 21 drives the second valve plate 23 to rotate to completely or partially cover the flow regulating window 221, thereby regulating the flow. The size of the opening of the flow regulating window 221 is adjusted to regulate the valve opening. The heating fluid flows sequentially through the fluid inlet 12, the valve chamber 11, and the flow regulating window 221, and exits from the fluid outlet 13. Compared to ball valve and gate valve structures, this embodiment uses a stacked structure in which the first valve plate 22 and the second valve plate 23 cooperate. The first valve plate 22 is fixedly blocked between the fluid inlet 12 and the fluid outlet 13. The second valve plate 23 is rotatably engaged with the end face of the first valve plate 22. The valve stem 21 drives the second valve plate 23 to rotate to cover or expose the flow regulating window 221, thereby regulating the valve opening and allowing the second valve plate 23 to... The rotation angle of the valve stem 21 is linearly related to the opening of the flow regulating window 221. This not only enables continuous and precise adjustment of the valve opening, but also allows the real-time acquisition of the opening of the flow regulating window 221 (i.e., the valve opening) by monitoring the rotation angle of the valve stem 21 through an angle sensor 4. This allows for precise adjustment of the flow rate from the fluid outlet, meeting the heating system's requirements for refined flow control. Furthermore, the overlapping arrangement of the first valve plate 22 and the second valve plate 23 results in a small footprint and high compactness, facilitating integrated installation within the limited space of the heating pipeline and reducing the overall size of the valve.

[0026] Both the first valve plate 22 and the second valve plate 23 can be made of ceramic material. Due to the processing characteristics of ceramic material, a surface with extremely low roughness can be obtained through high-precision mirror polishing. This results in less friction when the first valve plate 22 and the second valve plate 23 rotate relative to each other with their end faces abutting, thereby improving the sensitivity and accuracy of adjusting the opening of the flow regulating window 221, and thus improving the overall flow regulation accuracy and sensitivity of the flow valve. At the same time, ceramic material does not corrode in water or air, and the accuracy and stability of the valve plates will not be affected during long-term use of the flow valve, thereby increasing the service life of the flow valve and reducing the maintenance and repair costs.

[0027] Please see Figures 3 to 4 The driving device 3 is used to drive the valve stem 21 to rotate. The driving device 3 can adopt various structural forms readily conceived by those skilled in the art, such as a pneumatic drive structure or a hydraulic drive structure that converts linear motion into rotational motion of the valve stem 21 through a transmission structure, etc. However, in one embodiment of the present invention, the driving device 3 may include a geared motor, which is used to drive the valve stem 21 to rotate. The end of the valve stem 21 extends out of the geared motor, and an angle sensor 4 is coupled to the extended portion to monitor the rotation angle of the valve stem 21. Compared with a pneumatic drive structure or a hydraulic drive structure, in this embodiment, the end of the valve stem 21 is directly coupled inside the geared motor and extends out of the geared motor, and the angle... The angle sensor 4 is directly coupled to the through-hole part, completely eliminating the transmission lag and angle detection deviation caused by the fit clearance of the transmission structure or coupling, key connection clearance or spline side clearance in the traditional split structure. It realizes a high-precision zero-error correspondence between the rotation angle of the valve stem 21 and the detection value of the angle sensor 4, so that the angle sensor 4 can obtain the rotation angle of the valve stem 21 in real time, accurately and stably, thereby accurately obtaining the valve opening information, and then accurately obtaining the flow rate from the fluid outlet. This lays a reliable hardware foundation for fast and accurate closed-loop control based on the actual indoor temperature of the user, and further improves the control accuracy of the heating flow regulating valve 100.

[0028] Please see Figure 2 The first temperature monitoring unit 5 is used to monitor the water temperature on the supply side; the second temperature monitoring unit 6 is used to monitor the water temperature on the return side; both the first temperature monitoring unit 5 and the second temperature monitoring unit 6 can adopt various structural forms that are easy for those skilled in the art to conceive of, such as thermistor temperature sensor, thermocouple temperature sensor, platinum resistance temperature sensor or integrated digital temperature sensor, etc. In specific installation, the first temperature monitoring unit 5 can be installed on the water supply line, and the second temperature monitoring unit 6 can be installed on the return water line.

[0029] During use, the heating flow regulating valve 100 of the present invention can acquire the water temperature on the supply side and the water temperature on the return side in real time through the first temperature monitoring unit 5 and the second temperature monitoring unit 6. Based on the water temperature on the supply side and the water temperature on the return side, the actual indoor temperature of the user is calculated in real time. Then, based on the actual indoor temperature of the user, the control drive device 3 selectively drives the valve stem 21 to rotate, thereby adjusting the valve opening of the heating flow regulating valve 100 and thus adjusting the flow rate from the fluid outlet 13. During this process, the angle sensor 4 monitors the rotation angle of the valve stem 21 in real time, thereby accurately acquiring the valve opening and thus precisely controlling the flow rate. The flow rate from fluid outlet 13 is precisely regulated to achieve refined closed-loop control of the heating flow rate. The valve opening can be precisely controlled according to the actual indoor temperature of the user, thereby accurately controlling the flow rate from fluid outlet 13. Furthermore, the actual indoor temperature can be obtained without the need to install an additional indoor temperature sensor in the user's room, reducing installation costs and deployment complexity. At the same time, the dynamic adjustment mechanism based on real-time temperature feedback can effectively avoid the problems of overheating or underheating, achieving energy-saving operation while ensuring the thermal comfort of users, and significantly improving the intelligence level and energy utilization efficiency of the heating system.

[0030] To achieve coaxial mounting of the second valve plate 23 onto the valve stem 21, various structural forms readily conceived by those skilled in the art can be employed, such as welding, bonding, riveting, etc.; however, please refer to... Figures 5 to 13 In one embodiment of the present invention, the flow regulating unit 2 may further include a fixed connector 24. The fixed connector 24 includes a body portion 241, on which a plug hole 242 is provided. The end of the valve stem 21 is provided with a plug section 211 passing through the plug hole 242. A first anti-rotation structure is provided between the plug hole 242 and the plug section 211, and a second anti-rotation structure is provided between the body portion 241 and the second valve plate 23. Compared with connection methods such as welding, bonding, and riveting, this embodiment uses an additional fixed connector 24 and a mechanical connection method combining plug-in engagement and anti-rotation structure. This not only realizes the detachable assembly of the second valve plate 23 and the valve stem 21, but also... When the valve plate is worn or damaged, the second valve plate 23 or the fixed connector 24 can be replaced separately without scrapping the entire valve, which significantly reduces maintenance costs and repair cycles. Moreover, the dual cooperation design of the first and second anti-rotation structures, through the radial positioning of the insertion hole 242 and the insertion section 211 and the circumferential constraint of the anti-rotation structure, eliminates the relative rotational deviation between the valve stem 21 and the second valve plate 23. In this way, during the rotation of the valve stem 21, the rotation angle of the second valve plate 23 can be matched with the rotation angle of the valve stem 21 with high precision and zero error, further ensuring the consistency between the valve stem 21 rotation angle monitored by the angle sensor 4 and the actual opening degree of the flow regulating window 221, and further guaranteeing the accuracy of flow regulation.

[0031] Please see Figures 8 to 9 In one embodiment of the present invention, a first anti-rotation plane 243 may be provided in the insertion hole 242, and a second anti-rotation plane 212 that cooperates with the first anti-rotation plane 243 is provided on the insertion section 211. The first anti-rotation plane 243 and the second anti-rotation plane 212 constitute the first anti-rotation structure. In this way, by using the cooperation of the first anti-rotation plane 243 and the second anti-rotation plane 212, compared with splines or irregular cross sections, only planes need to be machined on the insertion hole 242 and the insertion section 211 to achieve circumferential limiting, which significantly reduces the difficulty of part processing and manufacturing cost. Furthermore, the surface contact cooperation between the first anti-rotation plane 243 and the second anti-rotation plane 212 increases the contact area for torque transmission, disperses stress concentration, and is suitable for the working conditions of frequent adjustment of heating valves. Moreover, the planar cooperation effectively suppresses the micro-movement gap between the valve stem 21 and the fixed connecting member 24, eliminates backlash and hysteresis during rotation, and further ensures that the rotation angle of the second valve plate 23 and the rotation angle of the valve stem 21 have high precision and zero error, providing a reliable mechanical transmission basis for precise control of flow regulation. In other embodiments, the first anti-rotation structure may also employ a spline or an irregular cross-section.

[0032] Please see Figures 8 to 9In one embodiment of the present invention, the insertion hole 242 may include a small-diameter hole 2421 near the first valve plate 22 and a large-diameter hole 2422 away from the first valve plate 22. A first stop surface 2423 is formed at the junction of the large-diameter hole 2422 and the small-diameter hole 2421. The first anti-rotation plane 243 includes a first straight surface 2431 located within the small-diameter hole 2421 and a first inclined surface 2432 located within the large-diameter hole 2422. The first inclined surface 2432 causes the large-diameter hole 2422 to gradually narrow towards the first valve plate 22. The insertion section 211 includes a small-diameter section 2111 that mates with the small-diameter hole 2421 and a large-diameter section 2112 that mates with the large-diameter hole 2422. The large-diameter section 2112 and... At the junction of the small-diameter section 2111, a second stop surface 2113 is formed to mate with the first stop surface 2423. The second anti-rotation plane 212 includes a second straight surface 2121 on the small-diameter section 2111 that mates with the first straight surface 2431, and a second inclined surface 2122 on the large-diameter section 2112 that mates with the first inclined surface 2432. The second inclined surface 2122 causes the large-diameter section 2112 to gradually narrow towards the first valve plate 22. In this way, by designing the insertion hole 242 as a stepped combination structure of the small-diameter hole 2421 and the large-diameter hole 2422, and forming the first stop surface 2423 at the junction of the two holes, and at the same time, the small-diameter section 2111 and the large-diameter hole 2422 are correspondingly arranged on the insertion section 211. The diameter section 2112 and the second stop surface 2113 achieve precise axial positioning between the insertion section 211 and the insertion hole 242, ensuring that the relative positions of the first valve plate 22 and the second valve plate 23 on the assembly reference surface are constant, eliminating transmission clearance caused by axial movement. Furthermore, a first straight surface 2431 is provided in the small-diameter hole 2421, and a first inclined surface 2432 is provided in the large-diameter hole 2422 to form a first anti-rotation plane 243. A second straight surface 2121 and a second inclined surface 2122 are correspondingly provided in the insertion section 211 to form a second anti-rotation plane 212. This ensures that the anti-rotation mating surfaces are simultaneously distributed in both the small-diameter mating area and the large-diameter mating area, significantly improving performance compared to a single-diameter anti-rotation structure. The increased anti-rotation contact area enables simultaneous constraint of multiple surfaces between the valve stem 21 and the second valve plate 23, effectively eliminating backlash errors caused by fit clearance. Furthermore, the tapered narrowing design of the first inclined surface 2432 and the second inclined surface 2122 generates a radial component force on the mating surface under axial force. This radial component force presses the insertion section 211 towards the center of the insertion hole 242, further eliminating the radial clearance between the insertion section 211 and the insertion hole 242. This ensures that the insertion section 211 and the insertion hole 242 are pressed tighter and tighter, further guaranteeing high-precision zero-error rotation angles between the second valve plate 23 and the valve stem 21, providing a reliable mechanical transmission basis for precise flow regulation. The angle between the first inclined surface 2432 and the axial direction of the valve stem 21 is preferably 10 degrees.

[0033] Please see Figures 8 to 9In one embodiment of the present invention, the number of first anti-rotation planes 243 can be two and arranged opposite each other, and the number of second anti-rotation planes 212 can be two and arranged opposite each other. Compared with the single-plane anti-rotation structure, the double-plane arrangement opposite each other forms a centrally symmetrical layout, which enables the second valve plate 23 to obtain consistent transmission accuracy when rotating in both directions. This allows the rotation angle of the second valve plate 23 and the rotation angle of the valve stem 21 to achieve high-precision zero-error synchronous transmission throughout the entire stroke range, significantly improving the linearity and repeatability of valve flow control.

[0034] Please see Figures 9 to 11 and Figure 13 In one embodiment of the present invention, the main body 241 may be provided with an annular boss 243, and a protrusion 244 is provided on the surface of the annular boss 243 opposite to the second valve plate 23. The second valve plate 23 is provided with a groove 231. The protrusion 244 and the groove 231 are interference-fitted to form a second anti-rotation structure. The interference fit between the protrusion 244 and the groove 231 realizes the circumferential limitation between the fixed connector 24 and the second valve plate 23, effectively preventing the relative rotation of the second valve plate 23 with respect to the fixed connector 24, ensuring the reliable transmission of torque from the valve stem 21 through the fixed connector 24 to the second valve plate 23, thereby ensuring the stability of the valve plate 23. The rotation angle of the fixed connector 24 and the rotation angle of the second valve plate 23 are both highly accurate with zero error, thus ensuring that the rotation angle of the second valve plate 23 and the rotation angle of the valve stem 21 are also highly accurate with zero error, providing a reliable mechanical transmission basis for precise flow regulation. Furthermore, the interference fit method allows for a tight connection during assembly by pressing in, eliminating the need for additional fasteners or welding processes, simplifying the assembly process, improving production efficiency, and allowing the second valve plate 23 to be pressed out of the fixed connector 24 and replaced with a new one using a special tool, without scrapping the entire flow regulation unit 2, thus reducing operating costs.

[0035] Please see Figure 10 In one embodiment of the present invention, the protrusion 244 may be provided with an elastic slot 2441 in the middle for elastic deformation of the protrusion 244. The elastic slot 2441 divides the protrusion 244 into an elastic petal structure. During assembly, the protrusion 244 is compressed and generates radial elastic contraction, which reduces the interference fit resistance between the protrusion 244 and the groove 231, making it easier for the protrusion 244 to be pressed into the groove 231. This avoids damage to the surface of the part caused by the large pressing force required for rigid interference fit. Furthermore, the elastic deformation characteristics enable the protrusion 244 to generate radial rebound after being pressed into the groove 231, increasing the friction between the outer wall of the protrusion 244 and the inner wall of the groove 231, further improving the reliability of the interference fit and effectively preventing loosening of the fit.

[0036] Please see Figures 10 to 11 and Figure 13In one embodiment of the present invention, the number of protrusions 244 can be at least four and are spaced apart circumferentially along the insertion hole 242. The number of grooves 231 corresponds to the number of protrusions 244. In this way, the multiple protrusions 244 are evenly distributed circumferentially, so that the torque transmission between the fixed connector 24 and the second valve plate 23 changes from single-point force to multi-point distributed force, which significantly reduces the load stress of a single protrusion 244, improves the load-bearing capacity and fatigue resistance of the second anti-rotation structure, and is suitable for the working conditions of frequent opening and closing adjustment of heating valves. It further ensures the high-precision synchronous correspondence between the rotation angle of the second valve plate 23 and the rotation angle of the valve stem 21.

[0037] Please see Figure 2 In one embodiment of the present invention, the valve body 1 may be provided with a display screen 8. The display screen 8 can display the cumulative heat, thermal power, cumulative flow, instantaneous flow, inlet temperature, outlet temperature, temperature difference and working time, etc., according to the national standard requirements of the heat meter, so as to facilitate intuitive reading.

[0038] In summary, the heating flow regulating valve 100 of the present invention acquires the water temperature on the supply side and the water temperature on the return side in real time through the first temperature monitoring unit 5 and the second temperature monitoring unit 6, and calculates the actual indoor temperature of the user in real time based on the water temperature on the supply side and the water temperature on the return side. Then, based on the actual indoor temperature of the user, the control drive device 3 selectively drives the valve stem 21 to rotate, thereby adjusting the valve opening of the heating flow regulating valve 100. During this process, the angle sensor 4 monitors the rotation angle of the valve stem 21 in real time, thereby accurately acquiring the valve opening and realizing refined closed-loop control of the heating flow. Furthermore, one end of the valve stem 21 is coaxially and integrally fixedly connected to the output shaft of the geared motor, and the other end is coaxially fixed to the valve stem 21 through the fixed connecting piece 24, effectively eliminating the internal deviation of the transmission chain. Flow test verification shows that the measured flow deviation at any valve opening is less than 5%, meeting the accuracy requirements of room temperature soft measurement and solving the problem of deviation accumulation during valve opening and closing. This invention achieves direct and accurate flow reading without relying on additional flow measurement devices such as ultrasonic or electromagnetic sensors. It also overcomes the limitation of traditional indoor temperature acquisition requiring in-home installation, allowing for real-time calculation of the actual indoor temperature simply by monitoring the water temperature on the supply and return sides. This enables direct acquisition of indoor temperature within the pipe shaft, completely avoiding management challenges such as uncertain installation time for room temperature data acquisition devices, user-initiated damage, and privacy disputes. It innovatively integrates the heat meter and self-regulating flow control valve into a single structure, combining heat metering, flow regulation, and indoor temperature monitoring functions. Upon receiving user complaints, it can read room temperature data in real time, providing objective evidence for heating disputes and effectively solving the long-standing problem of invalid complaints in the heating industry. This significantly improves the intelligence level and service quality of heating management. Furthermore, the heating flow control valve 100 of this invention can calculate and display cumulative heat, thermal power, cumulative flow, instantaneous flow, inlet temperature, outlet temperature, temperature difference, and operating time, fully complying with the functional requirements of GB / T 32224-2020 heat meters, thus realizing the functions of a heat meter.

[0039] Please see Figure 14 The present invention also provides a control method for a heating flow regulating valve 100, which is used to control the heating flow regulating valve 100. The structure of the heating flow regulating valve 100 is the same as above, and will not be described again here.

[0040] Control methods include: Step S1: Real-time acquisition of the water temperature on the supply side monitored by the first temperature monitoring unit 5 and the water temperature on the return side monitored by the second temperature monitoring unit 6; Step S2: Calculate the actual indoor temperature of the user in real time based on the water temperature on the supply side and the water temperature on the return side. The actual indoor temperature satisfies the following formula: Ts=(Tg+Th) / 2-CM / KA (Tg-Th) Ts is the actual indoor temperature, Tg is the water temperature on the supply side, Th is the water temperature on the return side, C is the specific heat capacity, M is the current flow rate from the fluid outlet, K is the constant heat transfer coefficient, and A is the user's indoor heating area. In this step, the supply water temperature Tg and return water temperature Th can be obtained from step S1. The specific heat capacity C, constant heat transfer coefficient K, and user indoor heating area A are all constants. The flow rate M can be directly obtained from the rotation angle of the valve stem 21 monitored by the angle sensor 4. Specifically, the rotation angle of the valve stem 21, the opening size of the flow regulating window 221, and the flow rate M value can be factory calibrated, that is, the flow rate M corresponds to the calibration change of the valve stem 21 rotation angle. This makes it easier to read the flow rate M directly from the angle sensor. It can be imagined that there are two main factors affecting the flow rate M: one is the opening size of the flow regulating window 221, and the other is the flow through the flow regulating window. To avoid interference from fluid pressure and make the flow rate M read from angle sensor 4 more accurate, thereby making the calculated actual indoor temperature more accurate, the heating flow regulating valve 100 of the present invention can also be equipped with a flow balancing mechanism as shown in the figure (number 7) to balance the fluid pressure flowing through the flow regulating window 221, so that the flow rate M is only related to the opening size of the flow regulating window 221, that is, only related to the rotation angle of valve stem 21, thereby realizing the balanced regulation of fluid flow. This component can adopt conventional design known in the art, and its structure and working mechanism are within the scope of prior art and are not related to the invention of this application. Therefore, this specification will not elaborate on it in detail.

[0041] The detailed derivation of the formula is as follows: Q=C M ΔT=C M (Tg-Th) Q=K A ((Tg+Th) / 2-Ts) Where: Q is heat, C is specific heat capacity, M is the current flow rate from the fluid outlet, Tg is the water temperature on the supply side, Th is the water temperature on the return side, K is the constant heat transfer coefficient, A is the indoor heating area of ​​the user, and Ts is the actual indoor temperature.

[0042] Step S3: Compare the actual indoor temperature with the preset temperature, and selectively control the drive device 3 to drive the valve stem 21 to rotate, so as to adjust the valve opening of the heating flow regulating valve 100. In this step, when the actual indoor temperature is lower than the preset temperature, the drive device 3 is controlled to drive the valve stem 21 to rotate. The rotation of the valve stem 21 causes the second valve plate 23 to rotate in the direction of increasing the opening of the flow regulating window 221, so as to increase the valve opening and make the actual indoor temperature reach the preset temperature. When the actual indoor temperature is higher than the preset temperature, the drive device 3 is controlled to drive the valve stem 21 to rotate. The rotation of the valve stem 21 causes the second valve plate 23 to rotate in the direction of decreasing the opening of the flow regulating window 221, so as to decrease the valve opening and make the actual indoor temperature reach the preset temperature.

[0043] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A flow regulating valve for heating, characterized in that, include: A valve body (1) is provided inside the valve body (1), and a fluid inlet (12) and a fluid outlet (13) connected to the valve cavity (11) are provided on the valve body (1); The flow regulating unit (2) includes a valve stem (21), which is rotatably mounted on the valve body (1) and can adjust the valve opening to adjust the fluid flow area during rotation; A drive device (3) is used to drive the valve stem (21) to rotate; An angle sensor (4) is used to monitor the rotation angle of the valve stem (21); The first temperature monitoring unit (5) is used to monitor the water temperature on the water supply side; The second temperature monitoring unit (6) is used to monitor the water temperature on the return water side.

2. The flow regulating valve for heating according to claim 1, characterized in that, The flow regulating unit (2) includes a first valve plate (22) and a second valve plate (23). The first valve plate (22) is located in the valve cavity (11) and is used to block the fluid inlet (12) and the fluid outlet (13). The valve stem (21) is rotatably mounted on the first valve plate (22). The first valve plate (22) is provided with a flow regulating window (221) extending along the rotation direction of the valve stem (21). The second valve plate (23) is coaxially fixed on the valve stem (21) and rotates with the end face of the first valve plate (22). The rotation of the valve stem (21) drives the second valve plate (23) to rotate to completely or partially cover the flow regulating window (221), thereby adjusting the opening size of the flow regulating window (221) and thus adjusting the valve opening. The heating fluid flows out from the fluid outlet (13) in sequence through the fluid inlet (12), the valve cavity (11) and the flow regulating window (221).

3. The flow regulating valve for heating according to claim 2, characterized in that, The flow regulating unit (2) further includes a fixed connector (24), which includes a body (241) and a plug hole (242) on the body (241). The end of the valve stem (21) is provided with a plug section (211) that passes through the plug hole (242). A first anti-rotation structure is provided between the plug hole (242) and the plug section (211) and a second anti-rotation structure is provided between the body (241) and the second valve plate (23).

4. The flow regulating valve for heating according to claim 3, characterized in that, The insertion hole (242) is provided with a first anti-rotation plane (243), and the insertion section (211) is provided with a second anti-rotation plane (212) that cooperates with the first anti-rotation plane (243). The first anti-rotation plane (243) and the second anti-rotation plane (212) constitute the first anti-rotation structure.

5. The flow regulating valve for heating according to claim 4, characterized in that, The insertion hole (242) includes a small diameter hole (2421) near the first valve plate (22) and a large diameter hole (2422) away from the first valve plate (22). The junction of the large diameter hole (2422) and the small diameter hole (2421) forms a first stop surface (2423). The first anti-rotation plane (243) includes a first straight surface (2431) located in the small diameter hole (2421) and a first inclined surface (2432) located in the large diameter hole (2422). The first inclined surface (2432) causes the large diameter hole (2422) to gradually narrow towards the first valve plate (22). The insertion section (211) includes a small diameter section (2111) that mates with the small diameter hole (2421) and a large diameter section (2112) that mates with the large diameter hole (2422). The junction of the large diameter section (2112) and the small diameter section (2111) forms a second stop surface (2113) that mates with the first stop surface (2423). The second anti-rotation plane (212) includes a second straight surface (2121) on the small diameter section (2111) that mates with the first straight surface (2431) and a second inclined surface (2122) on the large diameter section (2112) that mates with the first inclined surface (2432). The second inclined surface (2122) causes the large diameter section (2112) to gradually narrow towards the first valve plate (22).

6. The flow regulating valve for heating according to claim 5, characterized in that, The number of the first anti-rotation planes (243) is two and they are arranged opposite each other, and the number of the second anti-rotation planes (212) is two and they are arranged opposite each other.

7. The flow regulating valve for heating according to claim 3, characterized in that, The main body (241) is provided with an annular boss (243), and the annular boss (243) is provided with a protrusion (244) on the surface opposite to the second valve plate (23). The second valve plate (23) is provided with a groove (231), and the protrusion (244) and the groove (231) are press-fitted to form the second anti-rotation structure.

8. The flow regulating valve for heating according to claim 7, characterized in that, The protrusion (244) has an elastic slot (2441) in the middle for elastically deforming the protrusion (244); And / or, the number of the protrusions (244) is at least four and is arranged circumferentially spaced along the insertion hole (242), and the number of the grooves (231) corresponds to the number of the protrusions (244).

9. The flow regulating valve for heating according to claim 1, characterized in that, The drive device (3) includes a geared motor for driving the valve stem (21) to rotate. The end of the valve stem (21) extends through the geared motor, and the angle sensor (4) is coupled to the extended part to monitor the rotation angle of the valve stem (21).

10. A control method for a flow regulating valve for heating, characterized in that, The control method for controlling the heating flow regulating valve (100) according to any one of claims 1 to 9 includes: The water temperature on the supply side monitored by the first temperature monitoring unit (5) and the water temperature on the return side monitored by the second temperature monitoring unit (6) are acquired in real time. The actual indoor temperature of the user is calculated in real time based on the water temperature on the supply side and the water temperature on the return side, wherein the actual indoor temperature satisfies the following formula: Ts=(Tg+Th) / 2-CM / KA (Tg-Th) Ts is the actual indoor temperature, Tg is the water temperature on the supply side, Th is the water temperature on the return side, C is the specific heat capacity, M is the current flow rate from the fluid outlet (13), K is the constant heat transfer coefficient, and A is the indoor heating area of ​​the user. By comparing the actual indoor temperature with the preset temperature, the drive device (3) is selectively controlled to drive the valve stem (21) to rotate, so as to adjust the valve opening of the heating flow regulating valve (100).

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