Flow regulating valve

Abstract

The utility model provides a flow regulating valve, which comprises a valve body, a valve core, a valve core, a valve core and a valve core, the valve element is movably arranged in the valve cavity, the valve element is provided with a first end and a second end which are oppositely arranged in the moving direction, the second end is used for blocking or opening the valve port, and a sensing part is arranged on the valve element; the driving assembly comprises a memory alloy wire and an elastic piece, the length of the memory alloy wire is adjusted by changing the magnitude of current of the memory alloy wire, the memory alloy wire and the elastic piece are both in driving connection with the valve element, and the memory alloy wire and the elastic piece can provide acting force in opposite directions for the valve element so as to drive the valve element to reciprocate in the valve cavity; and the sensor is matched with the sensing part to detect the position of the valve element in the valve cavity. By means of the technical scheme, the problem that in the prior art, an electronic expansion valve is usually driven by a motor, the position of a valve needle cannot be obtained in the working process, and consequently the control precision of the electronic expansion valve is low can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of governing valve, specifically, relates to a flow governing valve. BACKGROUND

[0002] In refrigeration and air conditioning systems, electronic expansion valves are commonly used to regulate the flow of refrigerant to adapt to changes in system load. As a key flow control component, the performance of the electronic expansion valve is directly related to the energy efficiency and stability of the system.

[0003] Currently, electronic expansion valves are usually motor-driven, adjusting the position of the valve needle by controlling the rotation of the motor, and then adjusting the flow of refrigerant. However, the above-mentioned method cannot obtain the position of the valve needle when the valve needle moves, and the position of the valve needle is prone to deviation during long-term operation, resulting in inaccurate flow regulation of refrigerant and low control accuracy of the electronic expansion valve. SUMMARY

[0004] The utility model provides a flow governing valve to solve the problem of low control accuracy of the electronic expansion valve in the prior art, which is usually motor-driven and cannot obtain the position of the valve needle during operation.

[0005] The utility model provides a flow governing valve, which comprises a valve body having a valve cavity and a valve port that are in communication with each other, the valve port being arranged at one end of the valve cavity; a valve core movably arranged in the valve cavity, the valve core having a first end and a second end arranged opposite to each other along the moving direction, the second end being used for blocking or opening the valve port, and an induction part arranged on the valve core; a driving assembly comprising a memory alloy wire and an elastic member, the length of the memory alloy wire being adjustable, the length of the memory alloy wire being adjusted by changing the current of the memory alloy wire, the memory alloy wire and the elastic member being drivingly connected with the valve core, the memory alloy wire and the elastic member being capable of providing opposite forces to the valve core to drive the valve core to reciprocate in the valve cavity; and a sensor arranged in the valve body, the sensor cooperating with the induction part to detect the position of the valve core in the valve cavity.

[0006] Further, the memory alloy wire is located at the side of the valve core away from the valve port, the memory alloy wire is connected with the valve core and the valve body, and the memory alloy wire is used for driving the valve core to open the valve port; one end of the elastic member abuts against the valve body, the other end of the elastic member abuts against the valve core, and the elastic member is used for driving the valve core to block the valve port; and the memory alloy wire and the elastic member cooperate with each other to drive the valve core to block or open the valve port.

[0007] Further, the middle part of the memory alloy wire passes through the valve core, and both ends of the memory alloy wire extend away from the valve port and are connected with the valve body.

[0008] Further, the flow regulating valve further comprises a rotating member rotatably arranged on the valve core, an axis of rotation of the rotating member being perpendicular to the moving direction of the valve core, and the memory alloy wire is arranged around the rotating member, and the memory alloy wire drives the valve core to move through the rotating member.

[0009] Further, the valve core is provided with a mounting groove, and the rotating member is arranged in the mounting groove.

[0010] Further, the valve core is provided with a mounting groove, and the rotating member is arranged in the mounting groove.

[0011] Further, the valve core is provided with a mounting groove, and the rotating member is arranged in the mounting groove.

[0012] Further, the valve core is provided with a mounting groove, and the rotating member is arranged in the mounting groove.

[0013] Further, the valve core is provided with a mounting groove, and the rotating member is arranged in the mounting groove.

[0014] Further, the sensor is a linear Hall sensor, and the sensing part is a magnetic member, and the linear Hall sensor can detect the distance between the magnetic member and the linear Hall sensor in real time.

[0015] Further, the sensor is a linear Hall sensor, and the sensing part is a magnetic member, and the linear Hall sensor can detect the distance between the magnetic member and the linear Hall sensor in real time.

[0016] Further, the sensor is a linear Hall sensor, and the sensing part is a magnetic member, and the linear Hall sensor can detect the distance between the magnetic member and the linear Hall sensor in real time.

[0017] Further, the valve body further comprises a control cavity, the control cavity being located at an end of the valve cavity away from the valve port, the control cavity being provided with a circuit board, the sensor being arranged on the circuit board, and the sensor and the memory alloy wire being electrically connected to the circuit board.

[0018] The technical scheme of the utility model discloses, through adopting the mutual cooperation of memory alloy wire and elastic piece as a driving assembly, the valve core is driven to block or open the valve port of the valve body, so that the step loss caused by the motor as a driving piece in the prior art can be avoided, and the valve core is directly driven by the driving assembly, without the transmission of the threaded structure, the influence of the threaded gap is avoided when the valve core moves, the drift problem when adjusting in the positive and negative directions is not existed, the response speed and the adjustment precision of the flow regulating valve are improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings accompanying the specification of this application form a part thereof, serve to provide further understanding of the application, and together with the description provide a complete description of the application. The illustrative embodiments of the application described herein are not meant to be limiting and merely provide examples of the application. In the drawings:

[0020] Figure 1 Partially sectioned view of the flow regulating valve is shown.

[0021] Figure 2 Structure schematic view of the first perspective of the valve core is shown.

[0022] Figure 3 Structure schematic view of the second perspective of the valve core is shown.

[0023] Figure 4 Structure schematic view of the valve seat is shown. Figure 3 Partially sectioned view along the A-A direction.

[0024] Figure 5 Structure schematic view of the valve seat is shown.

[0025] Among them, the above-mentioned drawing includes the following sign:

[0026] 10, valve body; 101, valve cavity; 102, valve port; 103, control cavity;

[0027] 20, valve core; 201, first end; 202, second end; 203, installation groove;

[0028] 21, first section; 22, middle section; 221, first step surface; 222, avoiding slot; 223, second step surface; 224, communicating hole; 23, second section; 231, cutting surface;

[0029] 31, memory alloy wire; 32, elastic member;

[0030] 40, rotating member;

[0031] 51, magnetic member; 52, placing slot;

[0032] 60, circuit board;

[0033] 70, valve seat; 701, first assembly port; 702, second assembly port; 703, third assembly port; 71, first connecting pipe; 72, second connecting pipe;

[0034] 80, cover body; 90, mounting base;

[0035] 100, sensor. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0037] As Figure 1 and Figure 2The utility model discloses an embodiment provides a flow regulating valve, the flow regulating valve includes: valve body 10, valve core 20, drive assembly and sensor 100. Among them, valve body 10 has the valve cavity 101 and valve port 102 of intercommunication, and valve port 102 sets up at one end of valve cavity 101. Valve core 20 movably sets up in valve cavity 101, and valve core 20 has the first end 201 and the second end 202 of relative setting along the moving direction, and the second end 202 is used for plugging or opening valve port 102, and the inductive portion is arranged on valve core 20. Drive assembly includes memory alloy wire 31 and elastic piece 32, and the length of memory alloy wire 31 is adjustable, and the length of memory alloy wire 31 is adjusted by changing the current of memory alloy wire 31, and memory alloy wire 31 and elastic piece 32 are all with valve core 20 drive connection, and memory alloy wire 31 and elastic piece 32 can provide the force of opposite direction for valve core 20 respectively to drive valve core 20 reciprocatingly moves in valve cavity 101. Sensor 100 sets up in valve body 10, and sensor 100 cooperates with the inductive portion to detect the position of valve core 20 in valve cavity 101. Among them, sensor 100 can be linear hall sensor, magnetic sensor or other displacement sensor etc.

[0038] The utility model discloses a technical scheme, through adopting memory alloy wire 31 and elastic piece 32 mutual cooperation as drive assembly, to drive valve core 20 plugging or opening valve body 10's valve port 102, like this can avoid the step phenomenon caused by motor as the drive piece in prior art, and through drive assembly direct drive to valve core 20, need not pass through the transmission of screw structure, when the movement of valve core 20 avoids the influence of thread gap, does not exist the drift problem when positive and negative adjustment, improves the response speed and the regulation accuracy of flow regulating valve. The built-in sensor 100 and the inductive portion on valve core 20 cooperate with each other to detect the position of valve core 20 in valve cavity 101 in real time, and the user can adjust the on-off state of memory alloy wire 31 through the position information, and then adjust the length, form closed loop control, so as to compensate for the displacement of valve core 20 caused by external pressure or temperature, to ensure that valve core 20 accurately reaches the opening and closing position, further improve the flow regulating accuracy, and ensure the stable operation of the system. And there is no noise generated by the motor during operation, which improves the user's use feeling.

[0039] In the embodiment, the memory alloy wire 31 provides a driving force for the valve core 20 to approach the valve port 102, and the elastic piece 32 provides a driving force for the valve core 20 to move away from the valve port 102; or the memory alloy wire 31 provides a driving force for the valve core 20 to move away from the valve port 102, and the elastic piece 32 provides a driving force for the valve core 20 to approach the valve port 102.

[0040] In this application, the shape memory alloy wire 31 can be made of materials such as nickel-titanium alloy or copper-aluminum-nickel alloy. The shape memory alloy wire 31 is electrically connected to an external power source. When energized, the current passing through the shape memory alloy wire 31 will generate heat. When the temperature rises above the phase transition temperature, the length of the shape memory alloy wire 31 will shorten. When it is necessary to maintain or extend the length of the shape memory alloy wire 31, the current passing through the shape memory alloy wire 31 can be reduced to lower its temperature. When the temperature drops below the phase transition temperature, the length of the shape memory alloy wire 31 will return to its initial length.

[0041] like Figure 1 and Figure 2 As shown, the shape memory alloy wire 31 is located on the side of the valve core 20 away from the valve port 102. The shape memory alloy wire 31 connects the valve core 20 and the valve body 10. The shape memory alloy wire 31 is used to drive the valve core 20 to open the valve port 102. When the shape memory alloy wire 31 is energized, it shortens, thereby pulling the valve core 20 away from the valve port 102, thus driving the valve core 20 to open the valve port 102. At this time, the elastic element 32 is compressed. One end of the elastic element 32 abuts against the valve body 10, and the other end abuts against the valve core 20. When the power is off or the current is low, the elastic element 32 can drive the valve core 20 to move towards the valve port 102 to seal the valve port 102. The shape memory alloy wire 31 and the elastic element 32 cooperate to drive the valve core 20 to seal or open the valve port 102. Furthermore, the above design allows the valve port 102 to be reliably closed even in the absence of power or in the event of a power outage, preventing abnormal refrigerant leakage and improving system safety.

[0042] In this application, the location of the elastic element 32 is not limited. In some embodiments, the two ends of the elastic element 32 can be connected to the ends of the valve body 10 and the valve core 20, respectively. In this embodiment, the elastic element 32 is a spring and is sleeved on the outer periphery of the valve core 20, which makes the driving force of the elastic element 32 on the valve core 20 more uniform.

[0043] In some embodiments, one end of the shape memory alloy wire 31 is connected to the valve body 10 and the other end is connected to the valve core 20, thereby driving the valve core 20 to move; in other embodiments, the other end of the shape memory alloy wire 31 may also bypass the valve core 20, thereby driving the valve core 20 to move.

[0044] Specifically, the shape memory alloy wire 31 passes around the valve core 20 in the middle, and both ends of the shape memory alloy wire 31 extend away from the valve port 102 and are connected to the valve body 10. This arrangement allows the shape memory alloy wire 31 to apply force more evenly when pulling the valve core 20, avoiding the valve core 20 from tilting during movement and improving the movement stability of the valve core 20.

[0045] like Figure 1As shown, the flow regulating valve further comprises a rotating member 40 rotatably arranged on the valve core 20, and the rotating axis of the rotating member 40 is perpendicular to the moving direction of the valve core 20. The memory alloy wire 31 is arranged around the rotating member 40, and the memory alloy wire 31 drives the valve core 20 to move through the rotating member 40. The memory alloy wire 31 indirectly drives the valve core 20 through the rotating member 40, avoiding direct contact between the memory alloy wire 31 and the valve core 20, reducing the wear caused by direct friction, prolonging the service life of the valve core 20, and reducing the noise generated by the flow regulating valve during operation. In addition, the sliding connection between the memory alloy wire 31 and the rotating member 40 can ensure that the driving force on both sides of the valve core 20 is more uniform, avoiding deflection of the valve core 20 during movement due to uneven force, improving the reliability of the drive and the stability of the movement of the valve core 20.

[0046] The rotating member 40 can be arranged on the outer side wall of the valve core 20 or penetrate into the interior of the valve core 20, and the rotating member 40 can be a fixed pulley or a rotating shaft.

[0047] As shown in Figure 1 , Figure 3 and Figure 4 , the valve core 20 has a mounting groove 203, and the rotating member 40 is arranged in the mounting groove 203. The arrangement of the mounting groove 203 allows at least part of the rotating member 40 to be located inside the valve core 20, saving space in the valve cavity 101 and optimizing the spatial layout of the flow regulating valve.

[0048] In some embodiments of the present application, the mounting groove 203 is arranged on the surface of the valve core 20. In other embodiments, the mounting groove 203 penetrates through the two radial sides of the valve core 20, so that the entire rotating member 40 is located in the mounting groove 203. The mounting groove 203 can protect the rotating member 40 and avoid interference between the rotating member 40 and other components, improving the stability of the rotation of the rotating member 40.

[0049] In the present embodiment, the position of the mounting groove 203 is not limited and can be arranged close to the first end 201 or the second end 202, or between the first end 201 and the second end 202.

[0050] The outer side wall of the valve core 20 is provided with a through hole, and the rotating member 40 is rotatably arranged on the valve core 20 through the cooperation of the fastener and the through hole.

[0051] As shown in Figures 2 to 4As shown, the valve core 20 has a first section 21, an intermediate section 22 and a second section 23 arranged in sequence along the moving direction, a step is formed between the intermediate section 22 and the first section 21 and the second section 23, the cross-sectional dimension of the intermediate section 22 along the extension direction of the valve core 20 is larger than that of the first section 21 and the second section 23, the first section 21 has a first end 201, and the design optimizes the structure of the valve core 20, avoids that the elastic member 32 occupies too large axial space after being sleeved on the outer periphery of the first section 21, and also reduces the size of the valve port 102, thereby optimizing the overall structure of the flow regulating valve and realizing the miniaturization of the flow regulating valve. The intermediate section 22 has a first stepped surface 221 near the first end 201, one end of the elastic member 32 abuts against the first stepped surface 221, the first stepped surface 221 provides a stress surface for the valve core 20, ensures that the driving force of the elastic member 32 can be uniformly transmitted to the valve core 20 through the first stepped surface 221, and avoids that the local stress is too large due to too small contact surface between the elastic member 32 and the valve core 20. The second section 23 has a second end 202, and the installation groove 203 is located on the intermediate section 22. In this way, the stability and straightness of the movement of the second end 202 when the memory alloy wire 31 pulls the valve core 20 can be ensured, and the control accuracy of the opening and closing valve of the flow regulating valve is further improved.

[0052] Further, the outer side wall of the intermediate section 22 is provided with an avoiding groove 222, the avoiding groove 222 extends from one end of the intermediate section 22 connected with the first section 21 to the other end, one end of the avoiding groove 222 communicates with the installation groove 203, and part of the memory alloy wire 31 is located in the avoiding groove 222. In this way, friction between the memory alloy wire 31 and the valve core 20 or other components when the memory alloy wire 31 contracts is avoided, the service life of the flow regulating valve is prolonged, and the noise generated when the flow regulating valve works is reduced. Moreover, the avoiding groove 222 can also serve as a movement path for the memory alloy wire 31, guides the movement of the memory alloy wire 31, makes the contraction and elongation of the memory alloy wire 31 be converted into the translational movement of the valve core 20 along the avoiding groove 222, ensures the straightness and stability of the memory alloy wire 31 in the transmission process, avoids the driving error caused by the bending or deviation of the memory alloy wire 31, and thereby improves the accuracy of the opening and closing action of the flow regulating valve.

[0053] In the present application, the valve core 20 has two avoiding grooves 222, the two avoiding grooves 222 are symmetrically arranged on both sides of the valve core 20, and the two avoiding grooves 222 are respectively arranged in one-to-one correspondence with the parts of the memory alloy wire 31 located on both sides of the valve core 20. Moreover, the avoiding grooves 222 on both sides of the valve core 20 cooperate with the installation groove 203 to guide the valve cavities 101 on both sides of the valve core 20 in the circumferential direction, and the stability of the movement of the valve core 20 is improved.

[0054] As Figure 1 and Figure 5As shown, the valve body 10 further comprises a valve seat 70, a first connecting pipe 71 and a second connecting pipe 72. The valve seat 70 is fixedly connected with the valve body 10 and arranged close to the valve port 102. The valve seat has a first assembly port 701, a second assembly port 702 and a third assembly port 703 which are sequentially communicated. The second assembly port 702 and the third assembly port 703 are coaxially arranged on two sides of the valve seat 70 respectively. The first connecting pipe 71 is communicated with the first assembly port 701, the second connecting pipe 72 is communicated with the second assembly port 702, and the third assembly port 703 is communicated with the valve cavity 101. The valve port 102 is arranged close to the second assembly port 702. The refrigerant enters the flow regulating valve from the second connecting pipe 72, flows out from the first connecting pipe 71, or flows into the first connecting pipe 71 and flows out from the second connecting pipe 72.

[0055] Specifically, the intermediate section 22 is provided with a balance channel which is communicated with the valve cavities at both ends of the valve core 20. In this way, the balance channel can balance the pressure received by the first end 201 and the second end 202 of the valve core 20, avoid the difficulty of movement or deviation of the valve core 20 caused by the pressure difference, and enable the valve core 20 to move more smoothly and accurately, thereby improving the control accuracy and response speed of the flow regulating valve.

[0056] As shown in Figure 3 and Figure 4 , the intermediate section 22 has a second stepped surface 223 close to the second end 202. The second stepped surface 223 is provided with a communication hole 224 which extends to the mounting groove 203. One end of the communication hole 224 is communicated with the valve cavity 101 on the side of the second stepped surface 223 facing the valve port 102, and the other end of the communication hole 224 is communicated with the mounting groove 203. The communication hole 224 forms a balance channel. The communication hole 224 eliminates the pressure difference between the two ends of the valve cavity 101, thereby reducing the pressure difference between the first end 201 and the second end 202 of the valve core 20, avoiding the gas trapping phenomenon caused by uneven pressure, and ensuring the smooth and unobstructed movement of the valve core 20. At the same time, the structure is simple and convenient to process.

[0057] As shown in Figure 2 and Figure 3 , part of the side wall of the second section 23 is processed with a cutting surface 231, so that the cross-sectional dimension of the second section 23 is smaller than the cross-sectional dimension of the third assembly port 703. In this way, when the valve is closed, the third assembly port 703 is not completely blocked, the communication hole 224 is communicated with the first connecting pipe 71, and the cutting surface 231 and the third assembly port 703 cooperatively form a balance channel. The above design can avoid the influence of the axial force generated by the sudden change of the internal pressure of the first connecting pipe 71 on the movement of the valve core 20, and ensure the opening and closing speed of the flow regulating valve.

[0058] The sensor 100 is a linear Hall sensor, and the sensing part is a magnetic part 51. The linear Hall sensor can sense the distance between the magnetic part 51 and the linear Hall sensor. The non-contact detection mode between the linear Hall sensor and the magnetic part avoids the abrasion, pollution or electrical interference caused by the direct contact between the sensor 100 and the assembly, and improves the detection reliability and service life of the sensor 100.

[0059] Specifically, the magnetic part 51 can be a permanent magnet. The linear Hall sensor can detect the Hall value, i.e. the magnetic flux, to sense the position of the magnetic part 51. When the magnetic part 51 approaches or moves away from the linear Hall sensor, the magnetic field of the magnetic part 51 acts on the Hall element in the linear Hall sensor, causing the Hall value to change. The linear Hall sensor can convert the change of the Hall value into distance information between the sensor 100 and the magnetic part 51, so as to know the moving position of the valve core 20 in the valve cavity 101. Before work, the initial set distance between the magnetic part 51 and the sensor 100 when the valve body 10 is opened and closed is measured and adjusted. During work, the memory alloy wire 31 is powered. When the memory alloy wire 31 reaches the phase transition temperature, it realizes contraction, drives the valve core 20 to move away from the valve port 102. When the sensor 100 detects that the valve core 20 moves beyond the initial set distance, the current flowing into the memory alloy wire 31 is reduced. When the material temperature is reduced below the phase transition temperature, the memory alloy wire 31 can move towards the valve port 102 under the action of the elastic part 32. Thus, the valve core 20 is adjusted repeatedly, and the real-time position feedback of the valve core 20 is realized through the sensor 100. When the position of the valve core 20 reaches the initial set value, the opening or closing action is completed. In this way, even when the external pressure changes, the extension length of the memory alloy wire 31 can be quickly adjusted and controlled through the position feedback of the sensor 100, so that the valve core 20 can always move to the position where the initial set value is located, thereby ensuring the opening and closing precision of the flow regulating valve and accurately adjusting the opening degree of the valve port 102.

[0060] As shown in FIGS. 1, 2 and 3, the first end 201 of the valve core 20 is provided with a sensor 100. The sensor 100 is arranged on the first end 201 of the valve core 20, and the second end 202 of the valve core 20 is provided with a valve port 102. Figure 1 and Figure 4 As shown in FIGS. 1, 2 and 3, the first end 201 of the valve core 20 is provided with a sensor 100. The sensor 100 is arranged on the first end 201 of the valve core 20, and the second end 202 of the valve core 20 is provided with a valve port 102.

[0061] In other embodiments, the valve core 20 is made of a permanent magnetic material, and the sensor 100 can directly sense the valve core 20.

[0062] As shown in FIGS. 1, 2 and 3, the first end 201 of the valve core 20 is provided with a sensor 100. The sensor 100 is arranged on the first end 201 of the valve core 20, and the second end 202 of the valve core 20 is provided with a valve port 102. Figure 1As shown, the valve body 10 further comprises a control cavity 103 located at the end of the valve cavity 101 away from the valve port 102, and a circuit board 60 is arranged in the control cavity 103. The sensor is arranged on the circuit board 60, and the sensor 100 and the memory alloy wire 31 are electrically connected to the circuit board 60. The sensor 100 on the circuit board 60 can quickly detect the position information of the valve core 20 and transmit the data to the control system or the control end, realizing accurate control of the opening of the flow regulating valve. Moreover, the circuit board 60 integrates the electrical connection of the sensor 100 and the memory alloy wire 31, realizing compact integration of the control components. This not only optimizes the spatial layout inside the flow regulating valve and reduces the volume of the flow regulating valve, but also simplifies the assembly process of the flow regulating valve, facilitating inspection, maintenance and upgrading by maintenance personnel, and improving the convenience of installation and use of the flow regulating valve. At the same time, the design of the control cavity 103 helps to realize effective isolation between electrical components and other components, improving the safety of the flow regulating valve. The sensor 100 can be arranged above or below the circuit board 60.

[0063] Specifically, the linear Hall sensor is located at the side of the valve core 20 away from the valve port 102, and the magnetic member 51 is arranged at the first end 201. The linear Hall sensor and the magnetic member 51 are arranged along the moving direction of the valve core 20. In this way, the linear Hall sensor and the magnetic member 51 can be kept facing each other and arranged at a close distance, and there is no external obstruction between the magnetic member 51 and the sensor 100. This arrangement mode of facing each other and being close to each other can ensure that the change of the magnetic field strength received by the sensor 100 is more significant, thereby improving the sensitivity and accuracy of position detection. At the same time, the signal propagation distance between the magnetic member 51 and the sensor 100 is reduced, thereby reducing the delay of signal detection and improving the response speed of the valve to the control signal.

[0064] Specifically, the circuit board 60 is electrically connected to an external power supply, and the circuit board 60 is fixed to the cover body 80 by fasteners. The two ends of the memory alloy wire 31 are inserted into the circuit board 60 through the connecting joints to realize electrical connection. The connecting joints can realize sealing between the circuit board 60.

[0065] As shown, Figure 1 The flow regulating valve further comprises a cover body 80 and a mounting seat 90. The cover body 80 is arranged at the end of the valve body 10 away from the valve port 102, and the mounting seat 90 is arranged at the end of the cover body 80 close to the valve core 20 and below the circuit board 60. The cover body 80 and the mounting seat 90 cooperatively form the control cavity 103. The end of the mounting seat 90 close to the valve port 102 has an opening, which is sleeved on the outer periphery of the first end 201 and can guide and limit the movement of the valve core 20. The end of the elastic member 32 away from the valve port 102 abuts against the mounting seat 90. The memory alloy wire 31 is electrically connected to the circuit board 60 after being inserted into the mounting seat 90. The sensor 100 can also be arranged in the mounting seat 90.

[0066] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof, but do not preclude the presence or addition of one or more other features, steps, operations, devices, components and / or combinations thereof.

[0067] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in the examples are not intended to limit the scope of the present application unless otherwise specifically stated. It is to be understood that the drawings are not necessarily to scale of the various parts shown in the drawings. Techniques, methods, and apparatus known to those of ordinary skill are not discussed in detail because they would be understood that such techniques, methods, and apparatus are considered part of the specification. In all examples shown and discussed herein, any specific value is to be interpreted as illustrative only and not as a limitation. Thus, other examples of example embodiments can have different values. It is noted that like numbers and letters on the figures identify like parts throughout the several views, and thus, once an item is defined in one figure, it is not necessary to discuss it further in connection with other figures where it is understood that the item will be similarly constructed and function in the same manner.

[0068] In the description of the present application, it is to be understood that the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship are generally based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, without making the opposite statement, these orientation words do not indicate and imply that the indicated device or element must have a particular orientation or be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0069] For purposes of the description hereinafter, spatial relative terms, such as "above", "below", "upper", "lower", and the like, can be used to describe the relative position of one element or feature to another as illustrated in the figures. It will be understood that the spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "up" other elements or features would then be oriented "below" or "down" the other elements or features. Thus, the exemplary term "above" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. Well, the spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "up" other elements or features would then be oriented "below" or "down" the other elements or features. Thus, the exemplary term "above" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0070] In addition, it needs to be explained that the use of "first", "second" and the like words to limit the parts, only for the convenience of the corresponding parts for the distinction, such as no other declaration, the above words have no special meaning, therefore can not be understood as the restriction of the scope of protection of the utility model.

[0071] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A flow regulating valve characterized by, The flow regulating valve comprises: a valve body (10) having a valve cavity (101) and a valve port (102) in communication with each other, the valve port (102) being arranged at one end of the valve cavity (101); a valve core (20) movably arranged in the valve cavity (101), the valve core (20) having a first end (201) and a second end (202) oppositely arranged along the moving direction, the second end (202) being used for blocking or opening the valve port (102), and the valve core (20) being provided with a sensing portion; a driving assembly comprising a memory alloy wire (31) and an elastic member (32), the memory alloy wire (31) having a length adjustable, the length of the memory alloy wire (31) being adjusted by changing the current flowing through the memory alloy wire (31), the memory alloy wire (31) and the elastic member (32) being drivingly connected with the valve core (20), the memory alloy wire (31) and the elastic member (32) being capable of providing the valve core (20) with forces in opposite directions respectively to drive the valve core (20) to reciprocally move in the valve cavity (101); a sensor (100) arranged in the valve body (10), the sensor (100) cooperating with the sensing portion to detect the position of the valve core (20) in the valve cavity (101).

2. The flow regulating valve according to claim 1, wherein: the memory alloy wire (31) is arranged at a side of the valve core (20) away from the valve port (102), the memory alloy wire (31) being connected with the valve core (20) and the valve body (10), and the memory alloy wire (31) being used for driving the valve core (20) to open the valve port (102); one end of the elastic member (32) is in abutment with the valve body (10), and the other end of the elastic member (32) is in abutment with the valve core (20), the elastic member (32) being used for driving the valve core (20) to block the valve port (102), and the memory alloy wire (31) and the elastic member (32) cooperating with each other to drive the valve core (20) to block or open the valve port (102).

3. The flow regulating valve of claim 1, wherein a middle portion of the memory alloy wire (31) passes through the valve core (20), and both ends of the memory alloy wire (31) extend away from the valve port (102) and are connected with the valve body (10).

4. The flow regulating valve of claim 3, wherein The flow regulating valve further comprises a rotating member (40) rotatably arranged on the valve core (20), an axis of rotation of the rotating member (40) being perpendicular to the moving direction of the valve core (20), the memory alloy wire (31) being arranged around the rotating member (40), and the memory alloy wire (31) driving the valve core (20) to move through the rotating member (40).

5. The flow regulating valve according to claim 4, wherein: the valve core (20) has a mounting groove (203) thereon, and the rotating member (40) is arranged in the mounting groove (203).

6. The flow regulating valve according to claim 5, wherein: The valve core (20) has a first section (21), an intermediate section (22) and a second section (23) arranged in sequence along the moving direction, and the intermediate section (22) forms a step with the first section (21) and the second section (23), and the cross-sectional dimension of the intermediate section (22) along the moving direction of the valve core (20) is greater than that of the first section (21) and the second section (23); The first section (21) has the first end (201), the intermediate section (22) has a first stepped surface (221) near the first end (201), and one end of the elastic member (32) abuts against the first stepped surface (221); and the second section (23) has the second end (202), and the mounting groove (203) is located on the intermediate section (22).

7. The flow regulating valve of claim 6, wherein, An avoiding groove (222) is arranged on the outer side wall of the intermediate section (22), the avoiding groove (222) extends from one end of the intermediate section (22) connected with the first section (21) to the other end, and one end of the avoiding groove (222) communicates with the mounting groove (203), and part of the memory alloy wire (31) is located in the avoiding groove (222).

8. The flow regulating valve of claim 6, wherein, A balance channel is arranged on the intermediate section (22), and the balance channel leads the valve cavities (101) at both ends of the valve core (20).

9. The flow regulating valve of claim 8, wherein, The intermediate section (22) has a second stepped surface (223) near the second end (202), the second stepped surface (223) is provided with a communication hole (224) extending to the mounting groove (203), one end of the communication hole (224) communicates with the valve cavity (101) on the side of the second stepped surface (223) facing the valve port (102), and the other end of the communication hole (224) communicates with the mounting groove (203), and the communication hole (224) forms the balance channel.

10. The flow regulating valve of claim 1, wherein, The sensor (100) is a linear Hall sensor, the sensing part is a magnetic member (51), and the linear Hall sensor can detect the distance between the magnetic member (51) and the linear Hall sensor in real time.

11. The flow regulating valve of claim 10, wherein, The linear Hall sensor is located on the side of the valve core (20) away from the valve port (102), and the magnetic member (51) is arranged on the first end (201), and the linear Hall sensor and the magnetic member (51) are arranged along the moving direction of the valve core (20).

12. The flow regulating valve of claim 10, wherein, A placement groove (52) is arranged on the end face of the first end (201), and the magnetic member (51) is located in the placement groove (52).

13. The flow regulating valve of claim 1, wherein, The valve body (10) further comprises a control cavity (103) located at the end of the valve cavity (101) away from the valve port (102), and an electric circuit board (60) is arranged in the control cavity (103), the sensor (100) is arranged on the electric circuit board (60), and the sensor (100) and the memory alloy wire (31) are electrically connected with the electric circuit board (60).

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