Temperature sensing regulating valve

Abstract

The invention discloses a temperature sensing regulating valve which comprises a valve body, a valve element and a memory alloy spring. The valve body is provided with a liquid passing cavity. The valve core is arranged in the liquid passing cavity; the memory alloy spring is arranged in the liquid passing cavity and abuts against the valve element, and the memory alloy spring is configured to be capable of sensing the temperature of liquid in the liquid passing cavity so as to push the valve element and / or the valve body to move. Compared with the prior art, the memory alloy spring is used for replacing a traditional wax bag, the valve element and / or the valve body can be pushed to move so as to open or close various water ways, and then the temperature of a medium is adjusted.

Description

Technical Field

[0001] The invention relates to a temperature-sensing regulating valve, belonging to the technical field of valves. Background Art

[0002] A temperature-sensing control valve is a device that can automatically generate mechanical movement according to changes in ambient temperature or medium temperature. It is widely used in many fields such as temperature control equipment, automotive systems, industrial equipment, and home appliances.

[0003] Wax pack, also known as paraffin temperature pack, is the most widely used mechanical temperature sensing drive element in the world. Its structure is to inject a mixture of paraffin and copper powder into a copper tube, then add a layer of sealing film at the tube mouth and install a push rod. When the mixed liquid in the copper tube senses and absorbs external heat, it expands, and then pushes the push rod out, realizing the function of temperature sensing drive.

[0004] However, as a traditional temperature sensing element, the wax pack has some natural disadvantages. On the one hand, the wax pack needs to heat the mixed liquid in the entire copper tube to produce sufficient expansion. This process requires the absorption of a large amount of heat, resulting in its inability to respond quickly to small temperature fluctuations, and the driving action has obvious lag. On the other hand, a precise matching gap needs to be maintained between the top rod and the copper shell, but in actual use conditions, foreign matter such as scale and fine particles in the temperature sensing medium can easily block these gaps, causing the wax pack to get stuck and fail. In addition, under repeated changes in temperature, the mixture of paraffin and copper powder will stratify due to the difference in their specific gravity, which greatly affects the service life of the wax pack. Despite the above problems with the wax pack, due to its long-term and widespread application, many existing driver structures are designed around the wax pack, which makes it face compatibility barriers when directly replacing it with a new temperature sensing element, increasing the replacement cost and technical difficulty. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a temperature-sensitive regulating valve, which can directly replace the wax bag.

[0006] The technical solution of the present invention is:

[0007] A temperature-sensing regulating valve, comprising:

[0008] A valve body having a liquid passage cavity;

[0009] A valve core is arranged in the liquid passage cavity;

[0010] A memory alloy spring is disposed in the liquid passage cavity and abuts against the valve core. The memory alloy spring is configured to sense the temperature of the liquid in the liquid passage cavity so as to push the valve core and / or the valve body to move.

[0011] As a further improvement of the present invention, it further includes a return spring, and the return spring is disposed in the liquid passage chamber and abuts against one side of the valve core relative to the shape memory alloy spring.

[0012] As a further improvement of the present invention, the valve core includes a mounting seat and a push rod, and the mounting seat is provided with a connecting portion for connecting the valve body.

[0013] As a further improvement of the present invention, the push rod is movably connected to the mounting seat, and includes an abutting end and a limiting end which are oppositely arranged, wherein the abutting end is disposed in the liquid passage chamber.

[0014] As a further improvement of the present invention, a first limiting member and a second limiting member are provided on both sides of the mounting seat, the first limiting member abuts against the limiting end of the push rod, and the second limiting member abuts against one end of the return spring away from the shape memory alloy spring.

[0015] As a further improvement of the present invention, the mounting seat is provided with a through hole, the push rod passes through the through hole and is movably connected to the mounting seat, the push rod includes a first end and a second end which are oppositely arranged, and a limiting protrusion is provided between the first end and the second end, and the limiting protrusion is arranged closer to the first end relative to the mounting seat.

[0016] As a further improvement of the present invention, the shape memory alloy spring is disposed between the limiting protrusion and the mounting seat.

[0017] As a further improvement of the present invention, a first limiting member and a second limiting member are provided on both sides of the mounting seat, the first end abuts against the first limiting member, the second limiting member is arranged closer to the second end, and the return spring is disposed between the second limiting member and the mounting seat, configured to drive the mounting seat to move in a direction close to the convex portion.

[0018] As a further improvement of the present invention, one end of the return spring abuts against the second limiting member, and the other end abuts against the mounting seat or the valve body.

[0019] As a further improvement of the present invention, in a direction parallel to the moving direction of the valve body, the length of the return spring is greater than the length of the shape memory alloy spring.

[0020] The beneficial technical effects of the present invention are as follows: The temperature-sensitive regulating valve of the present invention can directly replace the wax package, with high versatility and installation convenience. When upgrading or maintaining the equipment, there is no need to make complex modifications to the original driving structure. Just directly remove the wax package and replace it with the temperature-sensitive regulating valve of the present invention, which greatly reduces the replacement cost and time cost and improves the efficiency of equipment maintenance and upgrading. In addition, the moving directions of the temperature-sensitive regulating valve of the present invention when the temperature rises and falls are consistent with the original wax package drive, so that when replacing the equipment, there is no need to re-adjust or modify the mechanical components and control systems connected thereto, ensuring the compatibility and stability of the equipment, reducing the system adaptation problems that may be caused by the replacement of the driving element, and ensuring the normal operation and control accuracy of the equipment.

[0021] By arranging the reset spring on the same side as the shape memory alloy spring and sleeving it outside the shape memory alloy spring, the structure of the entire temperature-sensitive regulating valve becomes more compact, saving installation space. At the same time, this design helps to optimize the force transmission path of the temperature-sensitive regulating valve, improve the response speed and action accuracy of the temperature-sensitive regulating valve, ensure that when the temperature changes, the shape memory alloy spring can expand and contract quickly and accurately, thereby driving the driven part to generate stable mechanical motion and achieving precise control of the equipment. In addition, this layout helps to balance the force distribution inside the temperature-sensitive regulating valve, reduce internal friction and wear caused by force imbalance, and further improve the reliability and service life of the temperature-sensitive regulating valve. Description of the Drawings

[0022] Figure 1 is a schematic structural diagram of the temperature-sensitive regulating valve according to the first preferred embodiment of the present invention.

[0023] Figure 2 is Figure 1 a cross-sectional view of the temperature-sensitive regulating valve in the low-temperature state in

[0024] Figure 3 is Figure 1 a cross-sectional view of the temperature-sensitive regulating valve in the high-temperature state in

[0025] Figure 4 is a schematic structural diagram of the temperature-sensitive regulating valve according to the second preferred embodiment of the present invention.

[0026] Figure 5 is Figure 4 a cross-sectional view of the temperature-sensitive regulating valve in the low-temperature state in

[0027] Figure 6 is Figure 4 a cross-sectional view of the temperature-sensitive regulating valve in the high-temperature state in

[0028] Figure 7 is a schematic installation structure diagram of the temperature-sensitive regulating valve according to the third preferred embodiment of the present invention and the main flow channel.

[0029] Figure 8 is Figure 7 A schematic structural diagram of the temperature-sensing regulating valve in

[0030] Figure 9 is Figure 8 A schematic structural diagram after hiding the valve body and the return spring.

[0031] Figure 10 is Figure 9 A schematic structural diagram of the push rod in

[0032] Figure 11 is Figure 7 A sectional view of

[0033] Figure 12 is Figure 7 A sectional view in another state.

[0034] Figure 13 A schematic structural diagram of the temperature-sensing regulating valve that conforms to the fourth preferred embodiment of the present invention.

[0035] Figure 14 is Figure 13 A schematic structural diagram after hiding the valve body of the shown temperature-sensing regulating valve.

[0036] Figure 15 is Figure 13 A sectional view of the shown temperature-sensing regulating valve.

[0037] Figure 16 is Figure 13 A sectional view of another state of the shown temperature-sensing regulating valve.

[0038] Figure 17 A schematic structural diagram of the temperature-sensing regulating valve that conforms to the fifth preferred embodiment of the present invention.

[0039] Figure 18 is Figure 17 A sectional view of the temperature-sensing regulating valve in

[0040] Figure 19 is Figure 17 A schematic structural diagram of the valve core in

[0041] Figure 20 A schematic structural diagram of the temperature-sensing regulating valve that conforms to the sixth preferred embodiment of the present invention.

[0042] Figure 21 is Figure 20 A schematic structural diagram after hiding the valve body of the shown temperature-sensing regulating valve.

[0043] Figure 22 is Figure 20 A sectional view of the shown temperature-sensing regulating valve.

[0044] Figure 23 It is an exploded view of the temperature-sensitive regulating valve that conforms to the seventh preferred embodiment of the present invention.

[0045] Figure 24 It is Figure 23 a cross-sectional view of the temperature-sensitive regulating valve in

[0046] Figure 25 It is Figure 23 a schematic structural view of the valve core in

[0047] Figure 26 It is an exploded view of the temperature-sensitive regulating valve that conforms to the eighth preferred embodiment of the present invention.

[0048] Figure 27 It is Figure 26 a cross-sectional view of the temperature-sensitive regulating valve in

[0049] Figure 28 It is Figure 26 a schematic structural view of the valve core in

[0050] Figure 29 It is a schematic structural view of the temperature-sensitive regulating valve that conforms to the ninth preferred embodiment of the present invention.

[0051] Figure 30 It is Figure 29 a schematic combined structural view of the valve core and the shape memory alloy spring in

[0052] Figure 31 It is Figure 30 a schematic structural view of the valve core in

[0053] Figure 32 It is Figure 29 a sectional view of the temperature-sensitive regulating valve shown in Detailed implementation manners

[0054] In order to better understand the technical means of the present invention and implement it according to the content of the specification, the following further describes the detailed implementation manners of the present invention in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present invention but not to limit the scope of the present invention.

[0055] The present invention discloses a temperature-sensitive regulating valve 100, which includes a valve body 1, a valve core 2 and a shape memory alloy spring 3 located in the valve body 1. The shape memory alloy spring 3 abuts against the valve core 2 and is configured to be able to sense the temperature in the valve body 1 to push the valve core 2 to move.

[0056] Embodiment 1:

[0057] Please refer to Figures 1 to 3As shown, the valve core 2 includes a mounting seat 20 and a push rod 21 connected to the mounting seat 20. The mounting seat 20 is cylindrical, including a first end for the valve body 1 and a second end opposite to the first end. A receiving cavity 10 is provided between the first end and the second end. The receiving cavity 10 can not only provide an installation space for the shape memory alloy spring 3, but also provide a moving space for the abutting end 211 of the push rod 21 to slide within the receiving cavity 10, so as to realize the movable connection between the push rod 21 and the mounting seat 20. By setting the mounting seat 20, the telescopic movement of the shape memory alloy spring 3 in the receiving cavity 10 can be converted into the mechanical displacement of the mounting seat 20 and transmitted to the valve body 1, thus realizing the drive control for sensing temperature changes. Preferably, the mounting seat in this embodiment can be regarded as an inner valve body, which exists as the housing of the valve core 2. Therefore, at least a part of the push rod 21 is located inside the mounting seat.

[0058] In addition, the mounting seat 20 can provide physical protection for the shape memory alloy spring 3 in the receiving cavity 10, preventing it from being damaged by external machinery during use, and can also isolate the shape memory alloy spring 3 from direct contact with foreign objects in the temperature-sensing medium to a certain extent, avoiding problems such as the gap between the push rod 21 and the copper mounting seat 20 in the wax package being blocked, extending the service life of the temperature-sensing regulating valve 100, and improving its reliability in harsh environments.

[0059] The first end of the mounting seat 20 is provided with a connecting portion 201 for connecting to the valve body 1 to ensure a firm connection between the mounting seat 20 and the valve body 1. Optionally, in this embodiment, the connecting portion 201 is an external thread provided on the outside of the convex portion at the first end, and the reliable connection between the mounting seat 20 and the valve body 1 is realized through threaded connection. In other embodiments, the connecting portion 201 can also be other structures, such as a snap or an interference connection, etc. The present invention does not limit this. The setting of the connecting portion 201 not only enables the temperature-sensing regulating valve 100 to be conveniently and quickly connected to the valve body 1, but also ensures that the movement direction of the valve body 1 is consistent with the mounting seat 20, thus realizing the precise control and stable operation of the equipment.

[0060] The second end of the mounting seat 20 is provided with a groove and a snap ring 202. The snap ring 202 is snap-fitted in the groove, thereby fixing the card slot on the mounting seat 20. One end of the shape memory alloy spring 3 abuts against the snap ring 202, and the other end abuts against the abutting end 211 of the push rod 21. The setting of the groove and the snap ring 202 provides a stable fixed end for the shape memory alloy spring 3, ensuring the correct installation and reliable operation of the shape memory alloy spring 3 in the mounting seat 20.

[0061] The mounting base 20 is further provided with a liquid passing hole 2150 communicating with the accommodating cavity 10. In this embodiment, a plurality of liquid passing holes 2150 are provided on the outer peripheral wall of the mounting base 20. By providing the liquid passing holes 2150, the temperature-sensitive medium can smoothly enter the accommodating cavity 10 and contact the shape memory alloy spring 3 in the accommodating cavity 10, so that the shape memory alloy spring 3 can accurately sense the temperature change, thereby realizing precise temperature sensing and driving.

[0062] The shape memory alloy spring 3 is made of an alloy material with a shape memory effect. Its crystal grains are austenite at high temperature, and the shear modulus and elastic modulus are relatively high; at low temperature, they are martensite, and the shear modulus and elastic modulus are relatively low. The elastic force of the shape memory alloy spring 3 at high temperature is several times greater than that at low temperature. Therefore, the shape memory alloy spring 3 can sense the external temperature and make a driving response accordingly.

[0063] In the present invention, the shape memory alloy spring 3 is arranged in the accommodating cavity 10 of the mounting base 20. One end of the shape memory alloy spring 3 abuts against the mounting base 20, and the other end abuts against the abutting end 211 of the ejector rod 21. The shape memory alloy spring is configured to sense the temperature of the liquid entering the accommodating cavity 10 through the liquid passing hole 2150. When the temperature of the liquid rises, the elastic force of the shape memory alloy increases, so that the mounting base 20 can be driven to drive the valve body 1 to move away from the limiting end 32. Thus, the movement direction of the temperature-sensing regulating valve 100 driving the valve body 1 is designed to be consistent with the previous movement direction of the wax package (as Figure 2 and Figure 3 shown), which makes it unnecessary to re-debug or modify the mechanical components and control systems connected to the wax package driver during the replacement process, ensuring the compatibility and stability of the equipment, reducing the system adaptation problems that may be caused by the replacement of the driving element, and ensuring the normal operation and control accuracy of the equipment.

[0064] Since the force value sensitivity of the shape memory alloy spring 3 to the water temperature can reach 0.1 °C, that is, it can make a force value response to a temperature difference change of 0.1 °C. And the response speed to the rapid change of the water temperature is as high as 0.2 seconds. Therefore, after the temperature-sensing regulating valve 100 of the present invention replaces the wax driver, it can quickly and accurately respond to the temperature change and realize precise temperature control.

[0065] The ejector rod 21 is movably connected to the mounting seat 20 and includes an abutting end 211 and a limiting end 212 which are oppositely arranged. Among them, the abutting end 211 is located in the accommodating cavity 10 of the mounting seat 20 and abuts against one end of the shape memory alloy spring 3. The limiting end 212 is located outside the mounting seat 20 and is in limiting abutment with the first limiting member 61. By providing the first limiting member 61, the position of the ejector rod 21 is fixed. When the shape memory alloy spring 3 senses an increase in temperature and its elastic force increases, since the limiting end 212 of the ejector rod 21 is limited by the first limiting member 61, therefore, the ejector rod 21 cannot move, and thus the shape memory alloy spring 3 can drive the mounting seat 20 to move away from the limiting end 212.

[0066] The return spring 4 is arranged outside the mounting seat 20 and is configured to drive the valve body 1 to move towards the direction close to the limiting end 212. The main function of the return spring 4 is to provide a driving force for the valve body 1 to move towards the direction close to the limiting end 212 when the temperature decreases, and cooperate with the temperature-responsive action of the shape memory alloy spring 3 to realize the reciprocating movement of the temperature-sensitive regulating valve 100, ensuring the cyclic working ability of the driver.

[0067] In addition, in the present invention, the return spring 4 and the shape memory alloy spring 3 are arranged on the same side, making the structure of the entire temperature-sensitive regulating valve 100 more compact and saving the installation space. At the same time, it helps to balance the force distribution inside the temperature-sensitive regulating valve 100, reduce the internal friction and wear caused by the force imbalance, and further improve the reliability and service life of the temperature-sensitive regulating valve 100.

[0068] Furthermore, in the direction parallel to the moving direction of the valve body 1, the length of the return spring 4 is greater than the length of the memory spring. With such a setting, in the initial state, the return spring 4 has a larger compression amount, thereby providing a space basis for the sliding of the mounting seat 20 relative to the ejector rod 21, and can enable the valve body 1 to have a larger stroke range during the working process, be able to better adapt to the requirements of the driving stroke in different application scenarios, and improve the versatility and flexibility of the equipment.

[0069] Furthermore, first and second limit members 61 and 62 are provided on both sides of the mounting base 20. Among them, the first limit member 61 is in limiting abutment with the limiting end 212 of the ejector rod 21 to limit the movement of the ejector rod 21. Thus, when the elastic force of the shape memory alloy becomes larger, only the mounting base 20 and the valve body 1 can be pulled to move away from the limiting end 212, so as to ensure that the driving direction of the temperature-sensitive regulating valve 100 is consistent with the previous movement direction of the wax package. The second limit member 62 is in limiting abutment with one end of the return spring 4 away from the valve body 1 to limit the movement of the return spring 4. Thus, when the elastic force of the return spring 4 is greater than the elastic force of the shape memory alloy spring 3, the valve body 1 is driven to move towards the limiting end 212. Through the arrangement of the first limit member 61 and the second limit member 62, both the return spring 4 and the ejector rod 21 are limited. On the one hand, the middle valve body 1 has a tendency to move towards the first limit member 61 under the thrust of the return spring 4, and on the other hand, it is connected to the temperature-sensitive regulating valve 100 and has a tendency to move towards the second limit member 62 when the shape memory alloy spring 3 elongates. These two movement tendencies cancel each other out and balance, and as the temperature changes, the elastic force of the shape memory alloy spring 3 changes, breaking the balance and pushing the valve body 1 to slide left and right with the temperature change.

[0070] In this embodiment, one end of the return spring 4 abuts against the second limit member 62, and the other end abuts against the valve body 1. When the temperature decreases, the elastic force of the return spring 4 is greater than the elastic force of the shape memory alloy spring 3, so that the valve body 1 can be driven to move towards the limiting end 212.

[0071] A mating portion, a first extension wall 51, and a limiting wall 52 are provided on the valve body 1. Among them, the mating portion is used to be connected to the connecting portion 201, so as to realize the stable connection between the mounting base 20 and the valve body 1 and achieve the consistency of movement. The first extension wall 51 extends outward from the mating portion. One end of the return spring 4 abuts against the second limit member 62, and the other end abuts against the first extension wall 51. The setting of the first extension wall 51 provides a stable abutting surface for the return spring 4, so that the elastic force of the return spring 4 can be transmitted to the valve body 1 more directly and evenly. The optimization of this force transmission path reduces energy loss, improves the working efficiency of the driver, and ensures that the valve body 1 can quickly respond to the driving force of the return spring 4 to achieve precise control. The limiting wall 52 is connected to the first extension wall 51 and surrounds the outer periphery of the mating portion, and together with the mating portion and the first extension wall 51, forms an abutting groove for accommodating the return spring 4. The abutting groove provides a stable installation position for the return spring 4, ensures the reliable connection and force transmission between the return spring 4 and the valve body 1, and provides a guarantee for the linear movement of the return spring 4.

[0072] The first extension wall 51 is also provided with a liquid flow hole for liquid to flow through.

[0073] In another alternative embodiment, one end of the return spring 4 abuts against the second limiting member 62, and the other end abuts against the mounting seat 20. That is, the return spring 4 directly drives the movement of the mounting seat 20, and drives the valve body 1 to move through the mounting seat 20.

[0074] Specifically, a second extension wall extending outward from the connecting portion 201 is provided on the first end. One end of the return spring 4 abuts against the second limiting member 62, and the other end abuts against the second extension wall. By providing the second extension wall on the mounting seat 20, the structural design on the valve body 1 can be omitted, and the applicable range of the temperature-sensing regulating valve 100 can be improved.

[0075] Furthermore, channels for the ejector rod 21 to pass through are provided on both the mounting seat 20 and the valve body 1. With such a setting, the linearity and stability of the ejector rod 21 during movement are ensured, and the working reliability and control accuracy of the temperature-sensing regulating valve 100 are improved.

[0076] Please refer to Figure 2 and Figure 3 As shown, the movement process of the temperature-sensing regulating valve 100 of the present invention is as follows:

[0077] When the temperature is low, the elastic force of the shape memory alloy spring 3 is less than that of the return spring 4. The shape memory alloy spring 3 is compressed, and the return spring 4 drives the valve body 1 to move in the direction close to the limiting end 212. When the temperature rises, the elastic force of the shape memory alloy spring 3 gradually increases. When it is greater than the elastic force of the return spring 4, since the limiting end 212 of the ejector rod 21 is limited, therefore, the shape memory alloy spring 3 can pull the mounting seat 20 and the valve body 1 to move in the direction away from the limiting end 212. When the temperature decreases, the elastic force of the return spring 4 increases, and drives the valve body 1 to move in the direction close to the limiting end 212 again.

[0078] Embodiment 2:

[0079] Please refer to Figures 4 to 6 As shown, the present invention provides a temperature-sensing regulating valve 100, including a mounting seat 20, an ejector rod 21, a shape memory alloy spring 3, and a return spring 4.

[0080] The mounting base 20 is used to connect the shape memory alloy spring 3 and the valve body 1. The mounting base 20 includes a base and a connecting portion 201 provided on the base for connecting the valve body 1. By providing the connecting portion 201, a firm connection between the actuator and the valve body 1 is ensured. Optionally, in this embodiment, the connecting portion 201 is an external thread, and a reliable connection between the mounting base 20 and the valve body 1 is achieved through threaded connection. In other embodiments, the connecting portion 201 may also be other structures, such as a snap fit, or an interference fit, etc. The present invention does not limit this. Preferably, the mounting base 20 is installed by threading and interference fit to respectively correspond to two common mounting interfaces of the paraffin temperature package. The setting of the connecting portion 201 not only enables the temperature-sensing regulating valve 100 to be conveniently and quickly connected to the valve body 1, but also ensures that the movement direction of the valve body 1 is consistent with that of the mounting base 20, thereby achieving precise control and stable operation of the device.

[0081] A through hole 200 is provided on the mounting base 20, and the through hole 200 penetrates through the base and the connecting portion 201. By providing the through hole 200, after the ejector rod 21 passes through the through hole 200, the mounting base 20 is slidably connected to the ejector rod 21, providing a basis for the mounting base 20 to drive the movement of the valve body 1.

[0082] The ejector rod 21 penetrates through the through hole 200 and is movably connected to the mounting base 20. The ejector rod 21 includes a first end and a second end disposed opposite to each other, and a limiting protrusion 213 is provided between the first end and the second end. The limiting protrusion 213 is disposed closer to the first end relative to the mounting base 20. By providing the limiting protrusion 213 on the ejector rod 21, the moving distance of the mounting base 20 is limited, preventing the mounting base 20 from being overly displaced during movement and ensuring that the movement range of the mounting base 20 is within the designed range. In addition, by changing the distance between the limiting protrusion 213 and the second end of the ejector rod 21, the initial position and moving range of the mounting base 20 can be flexibly adjusted, thereby optimizing the working performance and adaptability of the temperature-sensing regulating valve 100.

[0083] Furthermore, a limiting stop 214 for limiting the mounting base 20 is provided at the second end of the ejector rod 21. By providing the limiting stop 214, the moving distance of the mounting base 20 is limited, preventing the mounting base 20 from being overly displaced during movement and deviating from the ejector rod 21. Preferably, a groove is provided at the second end of the ejector rod 21, and the limiting stop 214 is a snap ring disposed in the groove. Through the design of the groove and the snap ring, disassembly is facilitated to facilitate the ejector rod 21 to pass through the through hole 200 of the mounting base 20. Of course, in other embodiments, the limiting stop 214 may also be other components, and this is not limited.

[0084] Further, the temperature-sensitive regulating valve 100 further includes a first limiting member 61 for limiting the movement of the ejector rod 21. The first limiting member 61 is in limiting abutment with the first end of the ejector rod 21. In the moving direction of the mounting seat 20, the ejector rod 21 is limited and fixed by the first limiting member 61 to restrict the movement of the ejector rod 21 in the axial direction. Thus, when the elastic force of the shape memory alloy becomes larger, it can only pull the mounting seat 20 and the valve body 1 to move away from the limiting projection 213, thereby ensuring that the driving direction of the temperature-sensitive regulating valve 100 is consistent with the previous movement direction of the wax package.

[0085] The shape memory alloy spring 3 is disposed between the limiting projection 213 and the mounting seat 20. The shape memory alloy spring 3 is configured to drive the mounting seat 20 to move away from the limiting projection 213. The shape memory alloy spring 3 is made of an alloy material with a shape memory effect. Its crystal grains are austenite at high temperature, with relatively high shear modulus and elastic modulus, and martensite at low temperature, with relatively low shear modulus and elastic modulus. The elastic force of the shape memory alloy spring 3 at high temperature is several times greater than that at low temperature. Therefore, the shape memory alloy spring 3 can sense the external temperature and make a driving response accordingly.

[0086] In the present invention, the shape memory alloy spring 3 is sleeved on the ejector rod 21, with one end abutting against the limiting projection 213 and the other end abutting against the base of the mounting seat 20. When the temperature of the liquid rises, the elastic force of the shape memory alloy increases, so that it can drive the mounting seat 20 to drive the valve body 1 to move away from the limiting projection 213. Thus, the movement direction design of the temperature-sensitive regulating valve 100 driving the valve body 1 is made consistent with the previous movement direction of the wax package (as Figure 5 and Figure 6 shown), which makes it unnecessary to re-debug or modify the mechanical components and control systems connected to the wax package driver during the replacement process, ensuring the compatibility and stability of the equipment, reducing the system adaptation problems that may be caused by the replacement of the driving element, and ensuring the normal operation and control accuracy of the equipment.

[0087] Since the force value sensitivity of the shape memory alloy spring 3 to the water temperature can reach 0.1 °C, that is, it can make a force value response to a temperature difference change of 0.1 °C. And the response speed to the rapid change of the water temperature is as high as 0.2 seconds. Therefore, after the temperature-sensitive regulating valve 100 of the present invention replaces the wax driver, it can quickly and accurately respond to the temperature change and achieve precise temperature control.

[0088] The return spring 4 is arranged on the side of the mounting seat 20 away from the shape memory alloy spring 3, and is configured to drive the valve body 1 to move towards the direction close to the limiting protrusion 213. The main function of the return spring 4 is to provide a driving force for the valve body 1 to move towards the direction close to the limiting protrusion 213 when the temperature decreases, and cooperate with the temperature-responsive action of the shape memory alloy spring 3 to realize the reciprocating movement of the temperature-sensitive regulating valve 100, ensuring the cyclic working ability of the driver.

[0089] Further, in the direction parallel to the moving direction of the valve body 1, the length of the return spring 4 is greater than the length of the memory spring. With such a setting, in the initial state, the return spring 4 has a greater compression amount, thereby providing a spatial basis for the relative sliding of the mounting seat 20 with respect to the ejector rod 21, and moreover, it can enable the valve body 1 to have a greater stroke range during the working process, being able to better adapt to the requirements for the driving stroke in different application scenarios, and improving the versatility and flexibility of the device.

[0090] Further, the temperature-sensitive regulating valve 100 further includes a second limiting member 62, and the second limiting member 62 is arranged close to the second end of the ejector rod 21. The second limiting member 62 is in limiting abutment with the end of the return spring 4 away from the valve body 1 to limit the movement of the return spring 4, so that when the elastic force of the return spring 4 is greater than the elastic force of the shape memory alloy spring 3, it drives the valve body 1 to move towards the direction close to the limiting protrusion 213. Through the settings of the first limiting member 61 and the second limiting member 62, both the return spring 4 and the ejector rod 21 are limited. On the one hand, the valve body 1 in the middle has a tendency to move towards the first limiting member 61 under the thrust of the return spring 4, and on the other hand, it is connected to the temperature-sensitive regulating valve 100 and has a tendency to move towards the second limiting member 62 when the shape memory alloy spring 3 elongates. These two movement tendencies cancel each other out and balance each other, and as the temperature changes, the elastic force of the shape memory alloy spring 3 changes, breaking the balance and pushing the valve body 1 to slide left and right with the temperature change.

[0091] In this embodiment, one end of the return spring 4 abuts against the second limiting member 62, and the other end abuts against the valve body 1. When the temperature decreases, the elastic force of the return spring 4 is greater than the elastic force of the shape memory alloy spring 3, so that it can drive the valve body 1 to move towards the direction close to the limiting protrusion 213.

[0092] The valve body 1 is provided with a mating portion, a first extension wall 51, and a limiting wall 52. Among them, the mating portion is used to be connected to the connecting portion 201, so as to realize the stable connection between the mounting seat 20 and the valve body 1 and achieve the consistency of movement. The first extension wall 51 extends outward from the mating portion. One end of the return spring 4 abuts against the second limiting member 62, and the other end abuts against the first extension wall 51. The setting of the first extension wall 51 provides a stable abutting surface for the return spring 4, so that the elastic force of the return spring 4 can be transmitted to the valve body 1 more directly and evenly. This optimization of the force transmission path reduces energy loss, improves the working efficiency of the actuator, and ensures that the valve body 1 can quickly respond to the driving force of the return spring 4 to achieve precise control. The limiting wall 52 is connected to the first extension wall 51 and surrounds the outer periphery of the mating portion, and together with the mating portion and the first extension wall 51, they jointly enclose an abutting groove for accommodating the return spring 4. The abutting groove provides a stable installation position for the return spring 4, ensures the reliable connection and force transmission between the return spring 4 and the valve body 1, and provides a guarantee for the linear movement of the return spring 4.

[0093] In another alternative embodiment, one end of the return spring 4 abuts against the second limiting member 62, and the other end abuts against the mounting seat 20. That is, the return spring 4 directly drives the mounting seat 20 to move, and drives the valve body 1 to move through the mounting seat 20.

[0094] Specifically, the mounting seat 20 is provided with a second extension wall extending outward from the connecting portion 201. One end of the return spring 4 abuts against the second limiting member 62, and the other end abuts against the second extension wall. By providing the second extension wall on the mounting seat 20, the structural design on the valve body 1 can be omitted, and the applicable range of the temperature-sensitive regulating valve 100 can be improved.

[0095] Furthermore, the shape memory alloy spring 3 has a compressed state and a stretched state. There is a first distance between the limiting stop 214 and the limiting protrusion 213, and the difference between the first distance and the thickness of the mounting seat 20 is greater than or equal to the length of the shape memory alloy spring 3 in the stretched state. By reasonably arranging the distances among the limiting stop 214, the limiting protrusion 213, and the mounting seat 20, it is ensured that the shape memory alloy spring 3 can work normally within a predetermined space in both the stretched and compressed states, and it will not cause functional failure or damage due to insufficient space, improving the reliability and stability of the entire device and extending the service life.

[0096] Please refer to Figure 5 and Figure 6 As shown, the movement process of the temperature-sensitive regulating valve 100 of the present invention is as follows:

[0097] When the temperature is low, the elastic force of the shape memory alloy spring 3 is less than that of the return spring 4. The shape memory alloy spring 3 is compressed, and the return spring 4 drives the valve body 1 to move towards the direction close to the limit projection 213. When the temperature rises, the elastic force of the shape memory alloy spring 3 gradually increases. When it is greater than the elastic force of the return spring 4, since the first end of the ejector rod 21 is limited, the shape memory alloy spring 3 can push the moving mounting seat 20 and the valve body 1 to move away from the limit projection 213. When the temperature decreases, the elastic force of the return spring 4 increases, and again drives the valve body 1 to move towards the direction close to the limit projection 213.

[0098] Embodiment Three:

[0099] Please refer to Figures 7 to 12 As shown, the present invention discloses a temperature-sensitive regulating valve 100 for being installed in the main flow channel 7 of a large fluid device, so it is an embedded temperature-sensitive regulating valve 100. The main flow channel 7 is provided with a drainage port 73. The temperature-sensitive regulating valve 100 realizes the constant temperature regulation function by cooperating with the inner diameter of the main flow channel 7 and the drainage port 73 on the side wall.

[0100] The main flow channel 7 has a main flow channel water inlet 71, a main flow channel water outlet 72 and a drainage port 73 which are communicated with each other. The drainage port 73 is preferably two and covers the opposite sides of the outer periphery of the main flow channel 7. Of course, in other embodiments, the drainage port 73 can be designed according to actual needs, and no limitation is made thereto.

[0101] Specifically, the temperature-sensitive regulating valve 100 includes a regulating valve main body and a shape memory alloy spring 3. The regulating valve main body is received inside the main flow channel 7 and includes an ejector rod 21 and a valve body 1 that abuts against the inner wall surface of the main flow channel 7. The valve body 1 is provided with a through liquid cavity 10 and a drainage port 11 communicated with the liquid cavity 10. The valve body 1 has a connecting member 12 located in the liquid cavity 10, and at least part of the ejector rod 21 is located in the liquid cavity 10 and is movably connected to the connecting member 12. The connecting member 12 has a through hole (not shown) for the ejector rod 21 to pass through. The inner diameter of the through hole is slightly larger than the diameter of the ejector rod 21 by 0.01 - 0.02 mm, and the depth of the through hole is 0.8 - 10 times the diameter of the ejector rod 21.

[0102] Liquid enters the main flow channel 7 from the main flow channel water inlet 71. Because the valve body 1 abuts against the inner wall surface of the main flow channel 7, the liquid enters the liquid cavity 10 along the trend after entering the main flow channel 7, and then is discharged from the main flow channel water outlet 72.

[0103] In this embodiment, the position of the ejector rod 21 and the main flow channel 7 remains unchanged, and the valve body 1 can move relative to the ejector rod 21, that is, relative to the main flow channel 7. When the valve body 1 moves to a position where the drain port 11 and the drain flow port 73 are at least partially opposite, that is, when the drain port 11 and the drain flow port 73 are in communication, a part of the liquid in the liquid passing cavity 10 flows out from the drain port 11, passes through the drain flow port 73 and then is discharged from the main flow channel 7. In this way, the temperature of the liquid in the liquid passing cavity 10 is reduced. When the valve body 1 moves to a position where the drain port 11 and the drain flow port 73 are misaligned, the drain port 11 is blocked by the inner wall surface of the main flow channel 7, and the drain flow port 73 is blocked by the outer surface of the valve body 1. In this way, the liquid in the liquid passing cavity 10 cannot flow out and can only be discharged from the main flow channel water outlet 72.

[0104] Specifically, a blocking member 215 is provided on the ejector rod 21. The shape memory alloy spring 3 is located between the connecting member 12 and the blocking member 215 and is configured to be able to sense the temperature of the liquid in the liquid passing cavity 10 and drive the valve body 1 to move to a position where the drain port 11 and the drain flow port 73 are at least partially opposite. That is, the shape memory alloy spring 3 is also located in the liquid passing cavity 10 and can contact the liquid in the liquid passing cavity 10.

[0105] The shape memory alloy spring 3 is made of an alloy material with a shape memory effect. Its crystal grains are austenite at high temperature, and the shear modulus and elastic modulus are relatively high; they are martensite at low temperature, and the shear modulus and elastic modulus are relatively low. The elastic force of the shape memory alloy spring 3 at high temperature is several times greater than that at low temperature. Therefore, the shape memory alloy spring 3 can sense the external temperature and make a driving response accordingly.

[0106] Since the force value sensitivity of the shape memory alloy spring 3 to the water temperature can reach 0.1 °C, that is, it can make a force value response to a temperature difference change of 0.1 °C. And the response speed to a sharp change in water temperature is as high as 0.2 seconds. Therefore, the shape memory alloy spring 3 is used to accurately sense and quickly respond to the water temperature, so as to achieve precise control of the water temperature.

[0107] Please refer to Figure 11 and Figure 12As shown, the shape memory alloy spring 3 has a compressed state and a stretched state. When the liquid temperature in the liquid passage chamber 10 is relatively high, the shape memory alloy spring 3 can stretch and push the connecting member 12 to make at least part of the drain port 73 and the discharge port 11 relatively aligned; when the liquid temperature in the liquid passage chamber 10 decreases, the shape memory alloy spring 3 contracts, causing the valve body 1 to move to a position where the drain port 73 and the discharge port 11 are misaligned. In this way, the temperature of the liquid in the liquid passage chamber 10 can be automatically balanced and controlled within a certain range. In addition, the shape memory alloy spring 3 has strong corrosion resistance, so it can be used in chemical engineering, printing and dyeing, offshore engineering and other scenarios with acid-base corrosion.

[0108] Specifically, the temperature-sensitive regulating valve 100 further includes a return spring 4. The return spring 4 is located on the side of the connecting member 12 relative to the shape memory alloy spring 3 and abuts against the connecting member 12. There are two relatively arranged limiting portions 74 in the main flow channel 7. The ejector rod 21 and the return spring 3 respectively abut against one of the limiting portions 74. Preferably, both the limiting portion 74 and the connecting member 12 are cross brackets, so that liquid can flow through. Of course, in other embodiments, the limiting portion 74 and the connecting member 12 may be other structures, as long as there are holes for liquid to flow through, and no limitation is made thereto.

[0109] In this embodiment, in the flowing direction of the liquid in the liquid passage chamber 10, the shape memory alloy spring 3 is arranged close to the water inlet 71 of the main flow channel, and the return spring 4 is arranged close to the water outlet 72 of the main flow channel. The limiting portion 74 includes a first limiting portion 741 arranged close to the water inlet 71 of the main flow channel and a second limiting portion 742 arranged close to the water outlet 72 of the main flow channel. The end of the ejector rod 21 facing away from the return spring 4 abuts against the first limiting portion 741, and the end of the return spring 4 relative to the connecting member 12 abuts against the second limiting portion 742.

[0110] In other words, the regulating valve body and the return spring 4 are restricted between two limiting parts 74, and a balance is maintained by the elastic forces of the return spring 4 and the shape memory alloy spring 3. The states of the return spring 4 and the shape memory alloy spring 3 are opposite. When the shape memory alloy spring 3 is in a stretched state, the force exerted by the shape memory alloy spring 3 on the connecting piece 12 is greater than the force exerted by the return spring 4 on the connecting piece 12. Therefore, it will push the connecting piece 12 to move in the direction close to the return spring 4. At this time, the drain port 73 and the discharge port 11 are at least partially aligned. When the shape memory alloy spring 3 is in a compressed state, the force exerted by the shape memory alloy spring 3 on the connecting piece 12 is less than the force exerted by the return spring 4 on the connecting piece 12. Therefore, the return spring 4 will push the connecting piece 12 to move in the direction close to the shape memory alloy spring 3. At this time, the drain port 73 and the discharge port 11 are misaligned.

[0111] Of course, in other embodiments, it can be that when the shape memory alloy spring 3 is in a stretched state, the shape memory alloy spring 3 pushes the connecting piece 12 to move in the direction close to the return spring 4. At this time, the drain port 73 and the discharge port 11 are misaligned; when the shape memory alloy spring 3 is in a compressed state, the return spring 4 pushes the connecting piece 12 to move in the direction close to the shape memory alloy spring 3. At this time, the drain port 73 and the discharge port 11 are at least partially aligned. This is only a change in position and is not limited thereto.

[0112] One end of the ejector rod 21 relative to the gear member 215 is provided with a limiting member 214, and the limiting member 214 is used to limit the moving distance of the valve body 1 driven by the shape memory alloy spring 3. When the limiting member 214 abuts against the connecting piece 12, the distance between the connecting piece 12 and the gear member 215 is greater than or equal to the maximum stretching length of the shape memory alloy spring 3. That is to say, the limiting member 214 can play a limiting role. Preferably, when the limiting member 214 abuts against the connecting piece 12, the drain port 73 and the discharge port 11 are completely aligned.

[0113] Preferably, the gear member 215 includes a gear plate 2152 for abutting against the shape memory alloy spring 3 and a gear portion 2151 sleeved on the top plate 21. When the connecting piece 12 is pushed by the return spring 4 until the connecting piece 12 abuts against the gear portion 2151, the drain port 73 and the discharge port 11 are completely misaligned. That is, the moving distance of the connecting piece 12 is the distance between the limiting member 214 and the gear portion 2151. Preferably, the limiting member 214 is a gasket or a nut, etc., and is not limited thereto.

[0114] A through liquid hole 2150 is provided on the gear position member 215. The opening direction of the liquid hole 2150 is the same as the opening direction of the liquid passing cavity 10 and allows liquid to flow through. The liquid hole 2150 is opened on the gear position plate 2152.

[0115] In this embodiment, a cooling channel (not shown) is provided between the drain port 73 and the main flow channel water inlet 71. When the drain port 73 and the drain outlet 11 are in relative positions, the liquid discharged from the drain outlet 11 flows into the main flow channel water inlet 71 after passing through the drain port 73 and the cooling channel. In this way, recycling can be achieved, water resources can be saved, and costs can be reduced.

[0116] In addition, for different requirements of caliber, water pressure, flow rate, and temperature, by fitting and designing the stiffness of the shape memory alloy spring 3 in high and low temperature states, it is possible to match the comprehensive requirements of the temperature-sensitive control valve 100 for caliber, water pressure, flow rate, and temperature in different application scenarios only by replacing the shape memory alloy spring 3 and the return spring 4 while keeping the basic structure unchanged.

[0117] Embodiment 4:

[0118] Please refer to Figures 13 to 16 As shown, the present invention discloses a temperature-sensitive control valve 100, which includes a valve body 1, a valve core 2, and a shape memory alloy spring 3. The valve body 1 is made of a metal material or a non-metal material with corrosion resistance, high temperature resistance, and wear resistance, and has a hot water inlet 13, a cold water inlet 14, a liquid mixing cavity, and a mixed water outlet 15 that are interconnected.

[0119] The valve core 2 is received in the liquid mixing cavity and has a hot water port 26 corresponding to the hot water inlet 13 and a cold water port 27 corresponding to the cold water inlet 14. A clamping area is provided between the valve core 2 and the mixed water outlet 15. The shape memory alloy spring 3 is assembled in the clamping area and is configured to be able to drive the valve core 2 to move away from the mixed water outlet 15. During the movement of the valve core 2, the difference between the amount of hot water entering from the hot water port 26 and the amount of cold water entering from the cold water port 27 gradually increases or decreases.

[0120] Specifically, the temperature-sensitive control valve 100 has a water mixing mode and a pure water mode. In the water mixing mode, the hot water inlet 13 and the hot water port 26, and the cold water inlet 14 and the cold water port 27 are always in a connected state; in the pure water mode, one of the hot water port 26 and the cold water port 27 is aligned with the corresponding hot water inlet 13 or cold water inlet 14, and the other is misaligned with the corresponding hot water inlet 13 or cold water inlet 14.

[0121] Generally speaking, the temperature-sensing regulating valve 100 is in the mixing water mode. Between the hot water inlet 13 and the hot water outlet 26, and between the cold water inlet 14 and the cold water outlet 27, they always remain in a connected state. The hot water entering from the hot water outlet 26 and the cold water entering from the cold water outlet 27 are mixed with each other to form mixed water. When the temperature of the mixed water is relatively low, the valve core 2 moves towards the direction of the hot water inlet 13 under the drive of the shape memory alloy spring 3. At this time, the intersecting area between the hot water outlet 26 and the hot water inlet 13 gradually increases, and the amount of hot water flowing in from the hot water outlet 26 also gradually increases. While the intersecting area between the cold water outlet 27 and the cold water inlet 21 gradually decreases, and the amount of cold water flowing in from the cold water outlet 27 also gradually decreases. At this time, the temperature of the formed mixed water gradually rises. On the contrary, when the temperature of the mixed water is relatively high, the valve core 2 moves towards the direction of the cold water inlet 14 under the drive of the shape memory alloy spring 3. At this time, the intersecting area between the hot water outlet 26 and the hot water inlet 13 gradually decreases, and the amount of hot water flowing in from the hot water outlet 26 also gradually decreases. While the intersecting area between the cold water outlet 27 and the cold water inlet 21 gradually increases, and the amount of cold water flowing in from the cold water outlet 27 also gradually increases. At this time, the temperature of the formed mixed water gradually decreases.

[0122] When the hot water outlet 26 and the hot water inlet 13 are aligned with each other, that is, the hot water outlet 26 and the hot water inlet 13 completely intersect. At this time, the cold water outlet 27 and the cold water inlet 14 are misaligned with each other, and the temperature-sensing regulating valve 100 is in the pure water mode, that is, the pure water heating mode. When the cold water outlet 27 and the cold water inlet 14 are aligned with each other, that is, the cold water outlet 27 and the cold water inlet 14 completely intersect. At this time, the hot water outlet 26 and the hot water inlet 13 are misaligned with each other, and the temperature-sensing regulating valve 100 is in the pure water mode, that is, the pure water cooling mode.

[0123] Preferably, the diameter of the hot water outlet 26, the diameter of the cold water outlet 27, and the sum of the distances between the hot water outlet 26 and the cold water outlet 27 are less than or equal to the distance between the hot water inlet 13 and the cold water inlet 14. In this way, it can be ensured that the temperature-sensing regulating valve 100 can be switched from the mixing water mode to the pure water mode.

[0124] In this embodiment, the shape memory alloy spring 3 is made of an alloy material with shape memory effect. Its crystal grains are austenite at high temperature, and the shear modulus and elastic modulus are relatively high; at low temperature, they are martensite, and the shear modulus and elastic modulus are relatively low. The elastic force of the shape memory alloy spring 3 at high temperature is several times greater than that at low temperature. Therefore, the shape memory alloy spring 3 can sense the external temperature and make a driving response accordingly.

[0125] Since the force value sensitivity of the shape memory alloy spring 3 to the water temperature can reach 0.1 °C, that is, it can make a force value response to a temperature difference change of 0.1 °C. Moreover, the response speed to a rapid change in water temperature is as high as 0.2 seconds. Therefore, in the temperature-sensitive regulating valve 100 of the present invention, the shape memory alloy spring 3 is located between the valve core 2 and the mixed water outlet 15, so that the shape memory alloy spring 3 can directly contact the temperature of the mixed water about to be discharged, and the shape memory alloy spring 3 is used to accurately sense and quickly respond to the outlet temperature of the mixed water, thereby realizing precise control of the outlet temperature.

[0126] The valve core 2 has a first end and a second end, and the clamping area is formed between the first end and the mixed water outlet 15. In the direction of the valve body 1 from the second end to the first end, the cold water inlet 14, the hot water inlet 13, and the mixed water outlet 15 are arranged in sequence. That is to say, compared with the cold water inlet 14, the shape memory alloy spring 3 is closer to the hot water inlet 13.

[0127] Preferably, the valve body 1 is provided with a limiting member 14 near the mixed water outlet 15 in the liquid mixing cavity, and the clamping area is formed between the first end and the blocking member 215. That is to say, one end of the shape memory alloy spring 3 abuts against the blocking member 215, and the other end abuts against the first end.

[0128] The temperature-sensitive regulating valve 100 further includes a return spring 4 abutting against the second end. That is, the return spring 4 and the shape memory alloy spring 3 are respectively located on both sides of the valve core 2. To limit the position of the valve core 2 through the elastic force balance between the return spring 4 and the shape memory alloy spring 3. By setting the return spring 4, when the temperature of the mixed water decreases, the return spring 4 can push the valve body 1 to move in the direction close to the hot water inlet 13, so that the intersection area between the hot water port 26 and the hot water inlet 13 gradually increases, and the amount of hot water entering from the hot water port 26 also gradually increases.

[0129] The temperature-sensitive regulating valve 100 further includes a temperature regulating member 8 at least partially located in the liquid mixing chamber. The other end of the return spring 4 abuts against the temperature regulating member 8, and the temperature regulating member 8 is configured to be driven to squeeze the return spring 4. By providing the temperature regulating member 8, manual active participation in the temperature regulation process can be achieved. When the temperature regulating member 8 squeezes the return spring 4, the balance between the return spring 4 and the shape memory alloy spring 3 is broken, and the return spring 4 is compressed and can push the valve core 2 in the direction close to the hot water inlet 13 to increase the intersection area between the hot water port 26 and the hot water inlet 13, that is, increase the amount of hot water entering from the hot water port 26, and then directly increase the temperature of the mixed water discharged from the mixed water outlet 15. Conversely, when controlling the temperature regulating member 8 to move away from the return spring 4, the balance between the return spring 4 and the shape memory alloy spring 3 is broken, and the valve core 2 is pushed by the shape memory alloy spring 3 and moves in the direction of the cold water inlet 14 to increase the intersection area between the cold water port 27 and the cold water inlet 14, that is, increase the amount of cold water entering from the cold water port 27, and then directly reduce the temperature of the mixed water discharged from the mixed water outlet 15. In this way, by means of manual participation, the error tolerance rate is increased, and the water temperature can be adjusted in real time according to actual needs, which is more convenient.

[0130] Specifically, the temperature regulating member 8 includes a drivable portion 81 at least partially exposed to the valve body 1 and an abutting portion 82 abutting against the return spring 4, and the drivable portion 81 is movably connected to the valve body 1. A threaded portion 16 is provided in the valve body 1, and the drivable portion 81 is correspondingly provided with a conforming portion 811, and the drivable portion 81 is configured to be able to move along the threaded portion 16 in the direction of the return spring 4.

[0131] In this embodiment, a driving groove 810 is provided at one end of the drivable portion 81 exposed to the valve body 1, and a user can insert a screwdriver or other tool into the driving groove 810 to control the conforming portion 811 to rotate along the threaded portion 16, and then drive the temperature regulating member 8 to move along the threaded portion 16 in the direction close to or away from the return spring 4.

[0132] A plurality of sealing members 9 are provided between the valve core 2 and the inner wall surface of the valve body 1. The first sealing member 91 is close to the shape memory alloy spring 3, the second sealing member 92 is close to the return spring 4, and the third sealing member 93 is located between the hot water port 26 and the cold water port 27. Preferably, a sealing member 9 is also provided between the temperature regulating member 8 and the inner wall surface of the valve body 1. By providing the sealing members 9, the sealing and waterproof functions can be further enhanced.

[0133] Embodiment Five:

[0134] Please refer to Figures 17 to 19 As shown, the present invention provides a temperature-sensitive regulating valve 100, which is applied to scenarios mainly with high-temperature media, such as coffee brewing machines, central heating and other fields. The temperature-sensitive regulating valve 100 includes a valve body 1, a valve core 2 and a shape memory alloy spring 3.

[0135] The valve body 1 is made of a metal material or a non-metal material with corrosion resistance, high-temperature resistance and wear resistance. A hollow liquid passing cavity 10 is provided in the valve body 1 for liquid circulation. A hot water inlet 13, a cold water inlet 14 and a mixed water outlet 15 are provided on the valve body 1 and are communicated with the liquid passing cavity 10.

[0136] Please refer to Figure 18 and Figure 19 As shown, the valve core 2 is arranged in the liquid passing cavity 10 and can slide in the liquid passing cavity 10, so that by changing the position of the valve core 2, the temperature of the mixed water in the liquid passing cavity 10 can be changed.

[0137] The valve core 2 includes a head and a tail arranged oppositely. Among them, the head is located between the hot water inlet 13 and the mixed water outlet 15, and the tail abuts against the cold water inlet 14. In other words, the valve core 2 is mainly arranged close to the cold water inlet 14 and has a large gap with the hot water inlet 13. Such a setting makes the flow channel space between the hot water inlet 13 and the mixed water outlet 15 large, so that hot water can flow from the hot water inlet 13 to the mixed water outlet 15 with less resistance. This design ensures that when temperature adjustment is not required, hot water can quickly and smoothly pass through the valve body 1 and directly flow out from the mixed water outlet 15, improving the water outlet speed and efficiency. Since the valve core 2 is close to the cold water inlet 14, the injection of cold water is more sensitive and accurate, and the fine adjustment of the temperature of the mixed water can be realized, further improving the accuracy of temperature control. And, such a setting can also make the structure of the entire temperature-sensitive regulating valve 100 more compact and save installation space.

[0138] Furthermore, a plurality of protrusions 28 extending outward from the ejector rod 21 of the valve core 2 are provided on the head. The protrusions 28 abut against the inner wall of the liquid passing cavity 10, and the surface where the protrusions 28 abut against the inner wall is an arc surface matching the inner wall, so as to reduce the friction between the head and the inner wall and improve the sliding property of the valve core 2 in the liquid passing cavity 10.

[0139] A liquid passing part 280 is formed between two adjacent protrusions 28. That is, the liquid passing part 280 is provided on the head. By providing the liquid passing part 280, hot water can directly flow out from the liquid passing port to the mixed water outlet 15, improving the water outlet speed, ensuring that under normal working conditions, hot water can smoothly pass through the liquid passing part 280 of the head of the valve core 2 and directly flow to the mixed water outlet 15, reducing the residence time of hot water in the valve body 1 and improving the water outlet efficiency.

[0140] Further, from the ejector rod 21 to the cavity wall, the caliber of the liquid passing part 280 gradually increases. With such a setting, when hot water flows through the head of the valve core 2 towards the mixing water outlet 15, it can gradually spread and be evenly distributed, reducing the turbulence and resistance of the water flow, and further improving the water outlet speed and efficiency. At the same time, this design also helps to achieve more stable water flow control under different flow requirements, ensuring the uniformity of the mixed water temperature.

[0141] Please refer to Figure 18 and Figure 19 As shown, the tail is conical and at least partially protrudes into the cold water inlet 14. With such a setting, at normal temperature, the cold water inlet 14 is normally closed. Only when the shape memory alloy spring 3 is heated and elongated, pushing the valve core 2 to move away from the cold water inlet 14, the cold water inlet 14 will be opened to inject cold water to adjust the mixed water temperature. To ensure that when temperature adjustment is not required, the cold water inlet 14 remains closed, avoiding unnecessary cold water inflow, which not only saves water resources but also improves energy utilization efficiency.

[0142] In addition, the conical tail makes the contact surface between the valve core 2 and the cold water inlet 14 be an inclined surface, preferably an arc-shaped inclined surface. When the temperature of the mixing water outlet 15 is too high, when the shape memory alloy spring 3 drives the valve core 2 to move away from the cold water inlet 14, the conical tail fits more tightly with the cold water inlet 14, realizing precise adjustment of the injection of cold water, quickly responding to temperature changes, and realizing fine adjustment of the mixed water temperature, further improving the accuracy of temperature control.

[0143] The shape memory alloy spring 3 is made of an alloy material with shape memory effect. Its crystal grains are austenite at high temperature, with relatively high shear modulus and elastic modulus; and martensite at low temperature, with relatively low shear modulus and elastic modulus. The elastic force of the shape memory alloy spring 3 at high temperature is several times greater than that at low temperature. Therefore, the shape memory alloy spring 3 can sense the external temperature and make a driving response accordingly.

[0144] Since the force value sensitivity of the shape memory alloy spring 3 to water temperature can reach 0.1 °C, that is, it can make a force value response to a temperature difference change of 0.1 °C. And the response speed to a sharp change in water temperature is as high as 0.2 seconds. Therefore, in the temperature-sensitive regulating valve 100 of the present invention, the shape memory alloy spring 3 is located at the mixing water outlet 15, which can make the shape memory alloy spring 3 directly contact the temperature of the mixed water about to be discharged, and accurately sense and quickly respond to the outlet temperature of the mixed water by using the shape memory alloy spring 3, so as to achieve precise control of the outlet temperature.

[0145] Furthermore, the shape memory alloy spring 3 is disposed between the head and the tail. That is, the shape memory alloy spring 3 is disposed near the mixed water outlet 15 and the cold water inlet 14. By disposing the shape memory alloy spring 3 near the mixed water outlet 15, it can directly contact the mixed water about to be discharged, thereby achieving precise control of the outlet water temperature.

[0146] Furthermore, the temperature sensing regulating valve 100 further includes a return spring 4. The return spring 4 is disposed in the liquid passing cavity 10 and on the side of the head away from the shape memory alloy spring 3. That is, the return spring 4 and the shape memory alloy spring 3 are respectively located on both sides of the head of the valve core 2. By providing the return spring 4, when the temperature of the mixed water decreases, the return spring 4 can push the valve body 1 to move towards the direction close to the cold water mixed outlet 15, so that the tail of the valve core 2 can block the cold water inlet 14.

[0147] Furthermore, the hot water inlet 13 and the mixed water outlet 15 are disposed on the upper and lower sides of the valve body 1, while the cold water inlet 14 is disposed on the left or right side of the valve body 1. That is, an included angle is formed between the hot water inlet 13 and the cold water inlet 14. With such a setting, the hot water flows in from the hot water inlet 13 on the upper side of the valve body 1 and directly flows to the mixed water outlet 15 on the lower side of the valve body 1 through the liquid passing portion 280 of the head of the valve core 2, forming a relatively linear main flow channel, reducing the detour and retention of the hot water in the valve body 1, and improving the flow rate and outlet efficiency of the hot water. The cold water is injected from the cold water inlet 14 on the side of the valve body 1 and is laterally added to the flow of the hot water when needed to be mixed with the hot water, so that the water flows of the two media can be quickly and evenly mixed in the valve body 1, improving the mixing efficiency, avoiding the direct impact and interference of the two media when flowing into the valve body 1, helping to reduce the turbulence and eddy current phenomena of the water flow, reducing the water flow noise, and at the same time being beneficial to improving the sealing performance and working stability of the valve.

[0148] Furthermore, the diameter of the cold water inlet 14 is smaller than the diameter of the hot water inlet 13, so that the hot water can flow into the liquid passing cavity 10 with a larger flow rate, while the water inflow of the cold water is smaller, thereby enabling more subtle flow regulation and improving the accuracy of temperature control.

[0149] Furthermore, the temperature-sensing control valve 100 also includes a temperature regulating member 8, which is at least partially located in the liquid passage chamber 10 and abuts against the side of the return spring 4 away from the valve core 2. By providing the temperature regulating member 8, the user can flexibly adjust the set temperature of the temperature-sensing control valve 100 according to actual needs, which significantly improves the versatility and adaptability of the valve. Specifically, when the user rotates the temperature regulating member 8, the force balance between the return spring 4 and the memory alloy spring 3 can be changed, thereby achieving precise setting of different temperatures. This design enables the same temperature-sensing control valve 100 to be applied to a variety of different scenarios, meeting diverse temperature control needs, and greatly enhancing the applicability and flexibility of the equipment.

[0150] Furthermore, the temperature regulating member 8 includes an adjusting end and an abutting end, and the abutting end extends into the liquid passage chamber 10 and directly abuts against the reset spring 4, so as to directly transmit the force to the reset spring 4 and reduce the loss of force. In addition, a sealing member is provided between the temperature regulating member 8 and the cavity wall of the liquid passage chamber 10 to effectively prevent liquid leakage. The adjusting end is at least partially exposed to the valve body 1 and is threadedly connected to the valve body 1. It is convenient for users to manually adjust, and the compression amount of the reset spring 4 can be accurately changed by rotating the adjusting end, thereby adjusting the constant temperature setting to meet the temperature requirements of different scenarios.

[0151] The temperature-sensing regulating valve 100 includes a constant temperature state and an over-temperature state. In the constant temperature state, the hot water inlet 13 is normally open, and the cold water inlet 14 is normally closed in contact with the tail portion, so that in the constant temperature state, hot water is immediately injected into the valve body 1 and flows out from the mixed water outlet 15. In the over-temperature state, the memory alloy spring 3 senses the increase in temperature, and stretches to push the valve core 2 to move away from the cold water inlet 14, so that there is a liquid gap between the tail portion and the cold water inlet 14, so that cold water is appropriately injected, so that the temperature of the mixed water decreases. When the temperature of the mixed water drops below the target temperature, the elastic force of the memory alloy spring 3 decays, and the reset spring 4 can push the valve core 2 to close the cold water inlet 14, thereby increasing the temperature of the mixed water.

[0152] Furthermore, in the constant temperature state, the distance between the head and the hot water inlet 13 is defined as a first distance, and the distance that the memory alloy spring 3 stretches to push the valve core 2 to move is defined as a second distance, and the first distance is greater than the second distance. In this way, when the memory alloy spring 3 pushes the valve core 2 to move toward the hot water inlet 13, the hot water inlet 13 cannot be blocked, so that the hot water inlet 13 remains in a normally open state.

[0153] Embodiment six:

[0154] See also Figures 20 to 22As shown, the present invention discloses a temperature-sensitive regulating valve 100, comprising a valve body 1 and a valve core 2. The valve body 1 is made of a metal material or non-metal material that is corrosion-resistant, high-temperature-resistant, and wear-resistant, and has a hot water inlet 13, a cold water inlet 14, a mixing chamber, and a mixing outlet 15 that are interconnected.

[0155] The valve core 2 is movably disposed in the liquid mixing chamber, and includes a mounting seat 20 and a push rod 21 extending from the mounting seat 20 toward the hot water inlet 13, the push rod 21 is provided with a hot water inlet 26 corresponding to the hot water inlet 13, and the valve core body 21 is provided with a cold water inlet 27 corresponding to the cold water inlet 14. In this embodiment, the cold water inlet 27 and the cold water inlet 14 are usually in a misaligned state, so that the cold water inlet 14 remains in a normally closed state, and only hot water usually flows in the liquid mixing chamber to be suitable for high temperature environments.

[0156] The temperature-sensitive regulating valve 100 further includes a push rod 29, which is movably arranged in the mixing chamber, abuts against the side of the mounting seat 20 away from the push rod 21, and is interpenetrating with the valve core 2, and the push rod 29 is interconnected with the mixed water outlet 15. In other words, the water flow direction is the hot water outlet 26, the push rod 21, the mounting seat 20, the push rod 3 and the mixed water outlet 15. Preferably, a water outlet corresponding to the mixed water outlet 15 is provided on the push rod 29, and the water outlet is always in a connected state with the mixed water outlet 15.

[0157] The temperature-sensing regulating valve 100 further includes a memory alloy spring 3, which is sleeved on the top extension rod 29 and abuts against the mounting seat 20. Generally, the temperature range that can be adapted is different according to the setting of the parameters of the memory alloy spring 3. In this embodiment, when the memory alloy spring 3 senses that the temperature of the liquid has exceeded the high temperature and reached the over-temperature, the memory alloy spring 3 begins to stretch and pushes the mounting seat 20 to move, so that the cold water port 27 on the mounting seat 20 is at least partially opposite to the cold water inlet 14, and then the cold water inlet 14 is in an open state. At this time, the liquid in the mixing chamber is a mixture of hot water and cold water, and the hot water at the over-temperature is cooled by cold water to control it within a certain temperature range.

[0158] In this embodiment, the memory alloy spring 3 is made of an alloy material with shape memory effect, and its grains are austenite at high temperature, with high shear modulus and elastic modulus; and martensite at low temperature, with low shear modulus and elastic modulus. The elastic force of the memory alloy spring 3 at high temperature is several times greater than that at low temperature, so the memory alloy spring 3 can sense the external temperature and make a driving response accordingly.

[0159] Since the force value sensitivity of the shape memory alloy spring 3 to the water temperature can reach 0.1 °C, that is, it can make a force value response to a temperature difference change of 0.1 °C. Moreover, the response speed to a sharp change in water temperature is as high as 0.2 seconds. Therefore, in the temperature-sensitive regulating valve 100 of the present invention, the shape memory alloy spring 3 is located between the valve core 2 and the mixed water outlet 15, so that the shape memory alloy spring 3 can directly contact the temperature of the mixed water about to be discharged, and the shape memory alloy spring 3 is used to accurately sense and quickly respond to the outlet temperature of the mixed water, thereby realizing precise control of the outlet temperature.

[0160] The temperature-sensitive regulating valve 100 further includes a return spring 4. The return spring 4 is located between the mounting seat 20 and the hot water inlet 13, and one end of the return spring 4 abuts against the mounting seat 20. That is, the return spring 4 and the shape memory alloy spring 3 are respectively located on both sides of the mounting seat 20. To limit the position of the mounting seat 20 through the elastic force balance between the return spring 4 and the shape memory alloy spring 3.

[0161] A gear member 215 is provided in the valve body 1 near the hot water inlet 13. The return spring 4 is located between the mounting seat 20 and the gear member 215. The gear member 215 is provided with a through liquid hole 2150. One end of the ejector rod 21 facing the hot water inlet 13 is provided with a liquid passing portion, and the liquid passing portion can be driven to close the liquid passing hole 2150. That is to say, during the movement of the ejector rod 21 along with the mounting seat 20 towards the hot water inlet 13, the liquid passing portion gradually extends into the liquid passing hole 2150 and completely closes the liquid passing hole 2150. At this time, the hot water inlet 11 is in a closed state, the cold water inlet 14 is in a normally open state, and the water inflow of the cold water inlet 14 reaches the maximum. In this way, the mixed water in the mixing cavity can be quickly cooled to make it out of the over-temperature state.

[0162] In this embodiment, the liquid passing portion is a cone protruding towards the liquid passing hole 2150. Through the cone design, it can be made that the liquid passing portion enters the liquid passing hole 2150 little by little, gradually reducing the flow area of the liquid passing hole 2150, that is, reducing the amount of hot water flowing through the liquid passing hole 2150. In other words, during the movement of the valve core 2 towards the direction close to the hot water inlet 13, the amount of hot water entering from the hot water port 11 gradually decreases, and the amount of cold water entering from the cold water port 12 gradually increases.

[0163] Therefore, the temperature-sensitive regulating valve 100 has a high-temperature state and an over-temperature state. In the high-temperature state, the hot water inlet 13 is normally open, and the cold water inlet 14 is misaligned with the cold water outlet 27 to be normally closed. In the over-temperature state, the shape memory alloy spring 3 stretches to push the valve core 2 to move towards the hot water inlet 13 until the liquid passing part closes the liquid passing hole 2150, and the cold water inlet 14 is at least partially aligned with the cold water outlet 27.

[0164] The temperature-sensitive regulating valve 100 further includes a temperature regulating member 8 at least partially located in the liquid mixing chamber. The top push rod 29 is connected to the temperature regulating member 8, and the shape memory alloy spring 3 is located between the temperature regulating member 8 and the valve core body 4.

[0165] In this embodiment, the top push rod 29 can move relative to the valve body 1, that is, the top rod can move towards the mounting seat 20 to push the valve core 2 towards the hot water inlet 13, so that the cold water outlet 27 is at least partially aligned with the cold water inlet 14. Therefore, the top push rod 29 can be used as an independent component or integrated with the temperature regulating member 8, as long as it can be ensured that the temperature regulating member 8 can drive the top push rod 29 to push the mounting seat 20, and there is no limitation on this. Preferably, the temperature regulating member 8 is a temperature regulating knob, and the valve body 1 is internally provided with a threaded portion 16, and the temperature regulating member 8 is correspondingly provided with a matching portion 811. As long as the temperature regulating member 8 is rotated clockwise, the temperature regulating member 8 can be controlled to move towards the hot water inlet 13, and then drive the top push rod 29 to move synchronously. Of course, in other embodiments, it can also be set in other ways, and there is no limitation on this.

[0166] Preferably, there are two groups of outlets arranged at intervals, which can ensure that during the movement of the top push rod 29, part of the outlets is always in communication with the mixed water outlet 15.

[0167] The temperature regulating member 8 is movably connected to the valve body 1 and has a drivable portion 81 at least partially exposed to the outside of the valve body 6. The drivable portion 81 can be activated to move toward the direction of the valve core 2, and then drive the valve core 2 to move synchronously through the extension rod 29. The end of the drivable portion 81 exposed to the outside of the valve body 1 is provided with a driving groove 810, and the driving groove 810 can be inserted with a tool to drive the drivable portion 81 to rotate. Such a configuration can be distinguished from the memory alloy spring 3, and the hot water inlet 13 can be manually directly closed to cool the liquid in the mixing chamber. Therefore, the stretching length of the memory alloy spring 3 can be less than the moving distance of the temperature regulating member 8. In this way, when the water temperature is automatically adjusted by the memory alloy spring 3, the hot water inlet 13 remains in a normally open state, and only the amount of hot water is continuously reduced as the liquid-passing portion extends into the liquid-passing hole 2150. Only when the temperature adjustment member 8 is manually driven, the hot water inlet 13 can be closed, so that only cold water flows into the mixed liquid chamber at the same time. Of course, the maximum stretching length of the memory alloy spring 3 can also be set to be equal to or greater than the moving distance of the temperature adjustment member 8. At this time, the hot water inlet 13 can also be closed when the water temperature is automatically adjusted by the memory alloy spring 3. This can be adjusted according to actual conditions and is not limited to this.

[0168] Embodiment seven:

[0169] See also Figures 23 to 25 As shown, the present invention provides a temperature-sensitive regulating valve 100 , including a valve body 1 , a valve core 2 , a temperature regulating member 8 , a memory alloy spring 3 and a return spring 4 .

[0170] The valve body 1 serves as a supporting structure of the entire temperature-sensing regulating valve 100, and a liquid passage cavity 10 is provided inside the valve body 1 for allowing fluid to flow in. Optionally, the inner surface of the liquid passage cavity 10 is smooth to reduce resistance when the fluid flows.

[0171] Furthermore, the valve body 1 is provided with an extension wall extending toward the liquid passage chamber 10, and a through hole 17 is provided on the extension wall so that the fluid can enter the liquid passage chamber 10 of the valve body 1. The extension wall provides support for one end of the return spring 4 to ensure that the return spring 4 works stably.

[0172] The valve body 1 is provided with an internal thread which matches the external thread on the temperature regulating member 8 , so as to facilitate changing the installation position of the temperature regulating member 8 , thereby changing the temperature setting of the temperature sensing regulating valve 100 and improving the applicability of the temperature sensing regulating valve 100 .

[0173] The valve core 2 is disposed in the liquid passage chamber 10, and includes a mounting seat 20 and a push rod 21. The mounting seat 20 is in sliding contact with the cavity wall of the liquid passage chamber 10, so that the mounting seat 20 of the valve core 2 can provide a stable support point for the valve core 2, thereby avoiding unnecessary displacement of the valve core 2 during movement.

[0174] The valve core 2 is provided with a liquid through hole connected to the liquid passage chamber 10. By providing the liquid through hole, the fluid in the liquid passage chamber 10 can flow out through the liquid through hole and be sensed by the memory alloy spring 3, so that the memory alloy spring 3 can timely sense the change of the fluid temperature, thereby driving the valve core 2 to move in the liquid passage chamber 10 according to the temperature change, thereby improving the response speed of the temperature-sensitive regulating valve 100 and increasing the discharge rate.

[0175] In this embodiment, the valve core 2 is provided with a single-side opening channel 203. The single-side opening channel 203 is opened on one side of the mounting seat 20, and is a closed hole on the side of the push rod 21. That is, the single-side opening channel 203 is connected with the liquid passage chamber 10 on the side away from the temperature adjustment member 8. Such a configuration allows the fluid to flow only through a specific path. Since the single-side opening channel 203 is a closed hole on the side of the push rod 21, when the fluid flows through, the impact force of the fluid impacts the push rod 21, so that the protrusion 28 on the push rod 21 is more tightly connected with the leakage channel 83 on the temperature adjustment member 8, thereby effectively improving the sealing performance of the temperature-sensitive control valve 100.

[0176] Furthermore, the liquid through hole is arranged on the push rod 21, and the liquid through hole is connected with the liquid passage chamber 10 through the single-side opening channel 203. With such arrangement, after the fluid enters the single-side opening channel 203 from the liquid passage chamber 10, it can only flow to the memory alloy spring 3 through the liquid through hole, and the memory alloy spring 3 can sense the temperature change of the fluid more directly, thereby improving the accuracy and speed of temperature sensing, thereby ensuring that the valve can respond to the temperature change in time, realize rapid discharge, and protect the safety of the system.

[0177] Furthermore, the setting of the single-sided opening channel 203 on the valve core 2 also allows the fluid to flow from the larger area of the liquid chamber 10 to the smaller area of the single-sided opening channel 203, so that a large amount of fluid impacts the mounting seat 20, thereby improving the sealing performance between the valve core 2 and the temperature adjustment member 8.

[0178] In other embodiments, the single-side opening channel 203 may not be separately provided, and the liquid through hole may be provided at a position of the mounting seat 20 close to the cavity wall, so that the fluid contacts the memory alloy spring 3 through the liquid through hole on the mounting seat 20. The present invention is not limited to this.

[0179] Further, a protrusion 28 for blocking the drain channel 83 on the temperature regulating member 8 is provided on the side of the ejector rod 21 away from the mounting seat 20. The shape and size of the protrusion 28 match the drain channel 83 on the temperature regulating member 8 to ensure tight fit and closure of the drain channel 83 under normal operating conditions, preventing fluid leakage.

[0180] Further, a first sealing member 91 is sleeved on the protrusion 28, thereby increasing the sealing performance between the valve core 2 and the temperature regulating member 8 and improving the sealing performance of the temperature-sensing regulating valve 100.

[0181] Further, in the direction from the ejector rod 21 to the temperature regulating member 8, the cross-sectional area of the protrusion 28 first decreases and then increases. That is, the protrusion 28 has a structure with larger ends and a smaller middle part. With such a setting, on the one hand, the larger ends can be tightly connected to the drain channel 83, and on the other hand, the smaller middle part can cooperate with the first sealing member 91 to seal the drain channel 83, thereby significantly improving the sealing performance of the temperature-sensing regulating valve 100.

[0182] The temperature regulating member 8 is used to set the temperature threshold of the temperature-sensing regulating valve 100. It is disposed in the liquid passing cavity 10 and is close to the ejector rod 21. That is, the temperature regulating member 8 is arranged at the end of the fluid flow direction. A drain channel 83 for draining is provided on the temperature regulating member 8. By providing the drain channel 83 on the temperature regulating member 8, a reasonable layout can be achieved, and the space of the temperature-sensing regulating valve 100 can be effectively utilized. By providing the drain channel 83, fluid can be drained in time when the temperature is too high.

[0183] Further, the aperture of the drain channel 83 is smaller than the aperture of the single-side opening channel 203. With such a setting, the fluid flows from the larger-area liquid passing cavity 10 into the smaller-area drain channel 83, with a faster flow rate, so that the fluid can be discharged quickly, improving the drain efficiency and the safety performance of the temperature-sensing regulating valve 100. In addition, according to the fluid dynamics, pressure multiplied by area, when the aperture of the drain channel 83 is smaller, the effective sealing area is smaller, so that the fluid pressure required to push the valve core 2 away from the temperature regulating member 8 is also smaller, enabling the shape memory alloy spring 3 to quickly push the valve core 2 in the direction away from the temperature regulating member 8. While ensuring the drain function, the sensitivity of the valve core 2 to actuation is improved, enabling the valve core 2 to respond more quickly to temperature changes.

[0184] Preferably, the aperture of the drain channel 83 is 1.5 mm to 3 mm. By reasonably designing the aperture of the drain channel 83, the sealing performance and the timeliness of draining of the temperature-sensing regulating valve 100 can be improved.

[0185] The memory alloy spring 3 is made of an alloy material with a shape memory effect, and its grains are austenite at high temperature, with high shear modulus and elastic modulus; they are martensite at low temperature, with low shear modulus and elastic modulus. Since the elastic force of the memory alloy spring 3 at high temperature is several times greater than that at low temperature, the memory alloy spring 3 can sense the external temperature and respond to the drive accordingly. Since the force sensitivity of the memory alloy spring 3 to the liquid temperature can reach 0.1°C, that is, it can respond to a temperature difference of 0.1°C. In addition, the response speed to a sharp change in liquid temperature is as high as 0.2 seconds. Therefore, the temperature-sensing control valve 100 of the present invention can respond to temperature changes quickly and accurately, thereby improving the safety of the temperature-sensing control valve 100.

[0186] The memory alloy spring 3 is sleeved outside the push rod 21, so that the temperature of the fluid flowing out of the liquid through hole of the push rod 21 can be quickly sensed, and a rapid response to temperature and pressure can be achieved. One end of the memory alloy spring 3 abuts against the mounting seat 20, and the other end abuts against the temperature regulating member 8. The memory alloy spring 3 is configured to sense the temperature of the fluid flowing out of the liquid through hole, and can drive the valve core 2 to move away from the temperature regulating member 8. This arrangement allows the memory alloy spring 3 to quickly drive the valve core 2 away from the temperature regulating member 8 when the elastic force changes at high temperature, thereby quickly opening the leakage channel 83.

[0187] Since the memory spring can have a fatigue life of up to millions or even tens of millions of times and can withstand general acid and alkali corrosion, it is suitable for long-life and corrosive working environments. Therefore, it can significantly increase the service life of the temperature sensing control valve 100 and reduce maintenance costs.

[0188] Furthermore, the temperature-sensitive regulating valve 100 further includes a reset spring 4. The reset spring 4 is disposed in the liquid passage chamber 10, located on the side of the mounting seat 20 away from the memory alloy spring 3, and has a tendency to drive the valve core 2 to move toward the temperature regulating member 8. By providing the reset spring 4, the temperature-sensitive regulating valve 100 is kept in a normally closed sealed state under normal conditions. In addition, the reset spring 4 can also give the protrusion 28 of the valve core 2 a tendency to approach the leakage channel 83, thereby improving the sealing performance of the temperature-sensitive regulating valve 100.

[0189] One end of the return spring 4 abuts against the extension wall, and the other end abuts against the mounting seat 20. That is, the return spring 4 and the memory alloy spring 3 are respectively arranged on both sides of the mounting seat 20, and work together to achieve precise control of temperature and pressure.

[0190] Further, an internal thread is provided on the valve body 1, and an external thread matching the internal thread is provided on the temperature adjusting member 8. Through the arrangement of the internal thread and the external thread, the temperature adjusting member 8 can move relative to the valve body 1. Furthermore, by adjusting the position of the temperature adjusting member 8 within the valve body 1, the compression amount of the return spring 4 can be changed, and thus the elastic force of the return spring 4 can be adjusted to set the opening temperature of the temperature-sensitive control valve 100.

[0191] Since the temperature-sensitive control valve 100 remains closed under normal conditions, the elastic force (i.e., compression distance) of the shape memory alloy spring 3 is fixed. By finely adjusting the position of the temperature adjusting member 8, only the compression stroke and elastic force of the return spring 4 will be affected. Therefore, whether it is for temperature or pressure changes, adjustment can be achieved by adjusting the temperature adjusting member 8.

[0192] Further, a second sealing member 92 is provided between the temperature adjusting member 8 and the valve body 1 to improve the sealing performance of the temperature-sensitive control valve 100.

[0193] Further, when dealing with different requirements for caliber, water pressure, discharge flow rate, and temperature, the present invention can, through the stiffness fitting design of the shape memory alloy spring 3 under high and low temperature conditions, achieve that under the condition of unchanged basic structure, only by replacing the shape memory alloy spring 3, the return spring 4, and the temperature adjusting member 8 can the comprehensive requirements of the temperature-sensitive control valve 100 for caliber, water pressure, discharge flow rate, and temperature in different application scenarios be matched. The structure is simple, the cost is low, and the applicability is strong.

[0194] Embodiment Eight:

[0195] Please refer to Figures 26 to 28 As shown, the present invention provides a temperature-sensitive control valve 100, which includes a valve body 1, a valve core 2, a temperature adjusting member 8, and a spring assembly. Among them, the spring assembly includes a return spring 4 and a shape memory alloy spring 3.

[0196] The valve body 1 serves as the support structure of the entire temperature-sensitive control valve 100, including a water inlet, a water outlet, and a liquid passing cavity 10 provided between the water inlet and the water outlet. The liquid passing cavity 10 is a liquid passing cavity for fluid to flow in. Optionally, the inner surface of the liquid passing cavity 10 is smooth to reduce the resistance when the fluid flows.

[0197] Further, an extension wall extending towards the liquid passing cavity 10 is provided on the valve body 1, and a liquid flow hole is provided on the extension wall so that the fluid can enter the liquid passing cavity 10 of the valve body 1 through the liquid flow hole. The extension wall provides support for one end of the spring assembly to ensure the stable operation of the spring assembly.

[0198] The temperature adjusting member 8 is disposed at a position of the liquid passing cavity 10 close to the water outlet. A liquid flow channel for the outflow of the liquid is provided on the temperature adjusting member 8. By providing the liquid flow channel on the temperature adjusting member 8, the volume of the temperature sensing control valve 100 can be effectively reduced. By providing the temperature adjusting member 8, the compression space of the return spring 4 and the shape memory alloy spring 3 is changed through the temperature adjusting member 8, and the force value balance between the two is adjusted, thereby adjusting the fitting relationship between the temperature and the flow rate. In addition, when the pressure in the liquid flow channel is relatively high, a certain hydrodynamic force will be generated on the valve core 2, changing the initial force value balance of the return spring 4 and the shape memory alloy spring 3. By rotating the temperature adjusting member 8, the influence of the hydrodynamic force on the force value balance of the spring assembly can be offset.

[0199] Specifically, an internal thread is provided on the valve body 1, and an external thread matching the internal thread is provided on the temperature adjusting member 8. Through the arrangement of the internal thread and the external thread, the installation position of the temperature adjusting member 8 is changed, thereby changing the force value balance between the return spring 4 and the shape memory alloy spring 3, and further adjusting the fitting relationship between the temperature and the flow rate, that is, controlling the size of the flow rate according to the temperature.

[0200] Further, a sealing member 9 is provided between the temperature adjusting member 8 and the valve body 1 to improve the sealing performance of the temperature sensing control valve 100 and improve the flow control accuracy.

[0201] The valve core 2 is disposed in the liquid passing cavity 10 and includes a mounting seat 20 and a push rod 21.

[0202] A plurality of protrusions 28 extending outward are provided on the mounting seat 20, and the protrusions 28 are abutted against the cavity wall of the liquid passing cavity 10. Preferably, the surface of the protrusion 28 abutting against the cavity wall is an arc surface matching the cavity wall, thereby reducing the friction between the valve core 2 and the cavity wall and improving the sliding property of the valve core 2 in the liquid passing cavity 10.

[0203] A liquid passing portion 280 is formed between two adjacent protrusions 28. A liquid passing hole communicating with the liquid passing cavity 10 is provided on the valve core 2. By providing the liquid passing portion 280, part of the fluid in the liquid passing cavity 10 can flow out quickly through the liquid passing portion 280, and thus can be quickly sensed by the shape memory alloy spring 3, improving the sensitivity of the temperature sensing control valve 100.

[0204] Further, a single-side opening channel 203 is provided on the valve core 2. The single-side opening channel 203 communicates with the liquid flow channel, wherein the single-side opening channel 203 is opened on the side facing the water inlet and closed on the side facing the water outlet. With such an arrangement, part of the fluid can flow out through the single-side opening channel 203, increasing the total flow rate of the constant temperature flow meter and facilitating the flow rate adjustment.

[0205] Further, the liquid passing holes are provided on the ejector rod 21, and the liquid passing holes are communicated with the liquid passing cavity 10 through the single-side opening channel 203. With such a setting, when the fluid enters the single-side opening channel 203 from the liquid flow channel, it flows to the shape memory alloy spring 3 through the liquid passing holes, and the shape memory alloy spring 3 can more directly sense the temperature change of the fluid, thereby improving the accuracy and speed of temperature sensing.

[0206] That is to say, in this embodiment, the fluid in the temperature-sensing regulating valve 100 has two different flow paths from the water inlet to the water outlet. When the fluid enters from the water inlet, a part of the fluid can directly flow to the temperature regulating member 8 through the liquid passing portion 280, and the other part flows to the temperature regulating member 8 through the single-side opening channel 203 and the liquid passing holes. Both parts of the fluid have to flow out through the liquid flow channel on the temperature regulating member 8. With such a setting, more flexible and precise flow control can be achieved, the flow rate of the fluid can be increased, and it helps to improve the response speed and regulation accuracy of the temperature-sensing regulating valve 100, so that the temperature-sensing regulating valve 100 can more quickly and accurately adapt to the change of the fluid temperature and ensure the stable operation of the system within the set temperature range.

[0207] In addition, through the setting of the liquid passing portion 280, a large amount of fluid impact on the mounting seat 20 can be avoided, and the change of the position of the valve core 2 caused by the fluid impact can be avoided, thereby maintaining the force value balance between the spring assemblies, and improving the stability and reliability of the constant temperature flowmeter and the regulation accuracy.

[0208] Further, the aperture of the liquid flow channel is larger than the aperture of the single-side opening channel 203. With such a setting, the flow rate adjustment range of the temperature control flowmeter is increased, the flexibility and adaptability of the flow rate adjustment are improved, so that the temperature-sensing regulating valve 100 can achieve precise control within a wider flow rate range and better meet the flow rate requirements under different application scenarios.

[0209] A conical abutting end 211 for abutting against the liquid flow channel is provided at one end of the ejector rod 21 close to the temperature regulating member 8. By providing the abutting end 211, the cone can be partially inserted into the liquid flow channel, increasing the fitting degree of the effective flow rate and the temperature change. The abutting end 211 can more precisely control the opening degree of the liquid flow channel, thereby realizing delicate adjustment of the flow rate. When the temperature changes, the abutting end 211 can make the matching between the flow rate and the temperature more accurate.

[0210] Further, the abutting end 211 is in the water flow direction ( Figure 2The orthographic projection in the direction of the indicated arrow) is larger than the orthographic projection of the liquid flow channel. With such a setting, it can be ensured that the abutting end 211 can effectively cover the entire opening area of the liquid flow channel, thereby achieving more precise flow control. When the abutting end 211 moves towards the liquid flow channel, its larger orthographic projection can more comprehensively block or guide the fluid flow, reducing the possibility of fluid leakage from the edge of the liquid flow channel and improving the sealing performance and adjustment accuracy of the valve.

[0211] Furthermore, the taper range of the abutting end 211 is 45° to 60°. By changing the taper of the abutting end 211, a larger flow rate change range can be achieved within the same movement range of the valve core 2. This broadens the working range of the temperature-sensing regulating valve 100, enabling it to effectively regulate the flow rate within a wider temperature range and meet the requirements of different application scenarios.

[0212] Furthermore, the outer surface of the abutting end 211 is an inclined surface, preferably an arc-shaped inclined surface. When the temperature of the liquid is high, through the cooperation of the shape memory alloy spring 3 and the return spring 4, precise adjustment of the liquid flow rate is achieved, quickly responding to temperature changes and further improving the accuracy of flow control.

[0213] Furthermore, the temperature adjusting member 8 includes a connection side facing the abutting end 211, and a guiding portion 84 matching the shape of the abutting end 211 is provided on the connection side. By providing the guiding portion 84, precise positioning and guidance are provided for the abutting end 211, achieving more effective flow control and improving the adjustment accuracy and response speed of the temperature-sensing regulating valve 100.

[0214] The spring assembly includes a shape memory alloy spring 3 and a return spring 4 respectively arranged on both sides of the mounting seat 20. The spring assembly is configured to sense the fluid temperature in the liquid passage chamber 10 to drive the valve core 2 closer to or farther away from the temperature adjusting member 8. By providing the spring assembly, the temperature-sensing regulating valve 100 can respond to temperature changes and automatically adjust the flow rate, so that without connecting any external power supply and control signal, reliable flow rate adjustment can be achieved according to the actual temperature and pressure with a more sensitive temperature-sensing response speed and control accuracy.

[0215] The shape memory alloy spring 3 is made of an alloy material with a shape memory effect. Its crystal grains are austenite at high temperatures, with relatively high shear modulus and elastic modulus; they are martensite at low temperatures, with relatively low shear modulus and elastic modulus. Since the elastic force of the shape memory alloy spring 3 is several times greater at high temperatures than at low temperatures, the shape memory alloy spring 3 can sense the external temperature and thus make a driving response. Since the force value sensitivity of the shape memory alloy spring 3 to the liquid temperature can reach 0.1 °C, that is, it can make a force value response to a temperature difference change of 0.1 °C. Moreover, the response speed to a sharp change in liquid temperature is as high as 0.2 seconds. Therefore, the temperature-sensing regulating valve 100 of the present invention can quickly and accurately adjust the flow rate based on temperature changes, improving the response speed of the temperature-sensing regulating valve 100.

[0216] Since the shape memory alloy spring 3 can have a fatigue life of up to millions or even tens of millions of times and is resistant to general acid and alkali corrosion, it is suitable for long-life and corrosive working environments. Therefore, it can significantly improve the service life of the temperature-sensing regulating valve 100 and reduce maintenance costs.

[0217] The spring assembly has two installation methods.

[0218] When the fluid temperature is higher than the reference value, the return spring 4 is arranged between the valve body 1 and the valve core 2, and the shape memory alloy spring 3 is arranged between the valve core 2 and the temperature regulating member 8. As Figure 2 shown, that is, when the temperature is higher and the flow rate is larger: the return spring 4 is placed on the water inlet side, and the shape memory alloy spring 3 is placed on the water outlet side. The higher the temperature, the greater the elastic force of the shape memory alloy spring 3, and the valve core 2 will be pushed by the shape memory alloy spring 3 towards the water inlet direction. The gap between the abutting end 211 of the valve core 2 and the liquid flow channel of the temperature regulating member 8 will be larger, and the flow rate will also be larger. Conversely, when the temperature drops, the force value of the shape memory alloy spring 3 weakens, and the valve core 2 will be pushed by the return spring 4 towards the water outlet direction. The gap between the abutting end 211 of the valve core 2 and the liquid flow channel of the temperature regulating member 8 will decrease, and the flow rate will also decrease.

[0219] When the fluid temperature is lower than the reference value, the shape memory alloy spring 3 is arranged between the valve body 1 and the valve core 2, and the return spring 4 is arranged between the valve core 2 and the temperature regulating member 8. That is, when the temperature is lower and the flow rate is larger: the shape memory alloy spring 3 is placed on the water inlet side, and the return spring 4 is placed on the water outlet side. The higher the temperature, the greater the elastic force of the shape memory alloy spring 3, and the valve core 2 will be pushed by the shape memory alloy spring 3 towards the temperature regulating member 8 direction. The gap between the conical part of the valve core 2 and the liquid flow channel of the temperature regulating member 8 will become smaller, and the flow rate will also decrease. Conversely, when the temperature drops, the force value of the shape memory alloy spring 3 weakens, and the valve core 2 will be pushed by the return spring 4 towards the water inlet direction. The gap between the conical abutting end 211 of the valve core 2 and the liquid flow channel of the temperature regulating member 8 will increase, and the flow rate will also increase.

[0220] Furthermore, when meeting different requirements for water pressure, flow rate, and temperature, by fitting and designing the stiffness of the shape memory alloy spring 3 at high and low temperatures, it is possible to meet the comprehensive requirements of the temperature-sensing control valve 100 for water pressure, flow rate, and temperature in different application scenarios by simply replacing the shape memory alloy spring 3, the return spring 4, and the temperature adjustment member 8 under the condition that the basic structure remains unchanged. The structure is simple, the cost is low, and the applicability is strong.

[0221] Embodiment Nine:

[0222] Please refer to Figures 29 to 32 As shown, the present invention discloses a temperature-sensing control valve 100, which is usually serially installed at the end of a small pipeline. After the equipment stops, when the temperature of the medium in the small pipeline drops to a certain range, a drain valve is automatically opened to empty the medium in the pipeline. The temperature-sensing control valve 100 of the present invention is small in structure, especially suitable for small pipelines with a diameter of less than DN15, and is convenient for maintenance, low in cost, and has practicability.

[0223] Specifically, the temperature-sensing control valve 100 includes a valve body 1 and a valve core 2. The valve body 1 is used for serial installation at the end of the small pipeline and has a liquid passing cavity 10 and a water outlet communicating with the liquid passing cavity 10. Optionally, the inner surface of the liquid passing cavity 10 is smooth to reduce the resistance during fluid flow. Preferably, an installation portion 18 is provided on the outer periphery of the valve body 1, and the installation portion 18 is used to install the temperature-sensing control valve 100 to the small pipeline.

[0224] The valve core 2 is movably arranged in the liquid passing cavity 10, and a liquid flow channel is formed between the valve core 1 and the cavity wall of the liquid passing cavity 10. The liquid flow channel communicates with the water outlet to discharge the water of the temperature-sensing control valve 100 from the water outlet.

[0225] One end of the valve core 2 facing the water outlet is provided with a seal 9. In the normal state, the seal 9 abuts against the water outlet and completely closes the seal 9 to prevent the water in the temperature-sensing control valve 100 from leaking. Preferably, a seal groove 204 is provided at one end of the valve core 2 facing the water outlet, and at least a part of the seal 9 is received in the seal groove 204. At this time, the seal 9 is preferably an O-ring.

[0226] The spool 2 includes an abutting end 211 away from the water outlet, a sealing portion 205 provided with the sealing groove 204, and a pressing portion 206 connecting the abutting end 211 and the sealing portion 205. The seal 9 is restricted between the water outlet and the pressing portion 206. Preferably, the projection of the sealing portion 205 and the seal 9 on the water outlet can completely cover the water outlet. In this way, it can be ensured that the water outlet is blocked tightly to prevent leakage.

[0227] Preferably, a plane perpendicular to the extending direction of the liquid passing cavity 10 is defined as the projection plane. The projection of the sealing portion 205 on the projection plane is completely covered by the projection of the pressing portion 206 on the projection plane. That is, the area of the pressing portion 206 is larger than the area of the sealing portion 205, and the projection of the sealing portion 205 on the pressing portion 206 is completely covered by the pressing portion 206. At this time, the pressing portion 206 presses the seal 9 at the water outlet to completely fix it. And the force for pressing the seal 9 on the water outlet is the water flow flowing into the temperature-sensitive regulating valve 100 from the small pipeline. After the water flow enters the temperature-sensitive regulating valve 100, it continuously pushes the spool 2 to move it towards the water outlet, and then presses and fixes the seal 9 on the water outlet.

[0228] Therefore, the temperature-sensitive regulating valve 100 further includes a water inlet communicating with the liquid passing cavity 10 and the water outlet. The water inlet and the water outlet are preferably on the same horizontal line, that is, at both ends of the temperature-sensitive regulating valve 100.

[0229] The temperature-sensitive regulating valve 100 further includes a shape memory alloy spring 3. The shape memory alloy spring 3 is located between the spool 2 and the water outlet or on the side of the spool 2 relative to the water outlet. As Figure 31 and Figure 32 shown, the shape memory alloy spring 3 is located between the spool 2 and the water outlet, but this is only one implementation manner, and it can be adjusted to the side of the spool 2 relative to the water outlet according to the actual situation.

[0230] The grains of the shape memory alloy spring 3 are austenite in the high-temperature state, and its shear modulus and elastic modulus are much higher than those in the low-temperature martensite. Its external manifestation is that the elastic force of the shape memory alloy spring 3 at high temperature is several times greater than that at low temperature. This is the basis for the shape memory alloy spring to sense the external temperature and make a driving response. That is, when the shape memory alloy spring 3 senses high temperature, it will stretch, and when it senses low temperature, it will contract.

[0231] When the shape memory alloy spring 3 is located between the valve core 2 and the water outlet, the shape memory alloy spring 3 is arranged on the outer periphery of the sealing part 205 and the pressing part 206 and abuts against the abutting end 211. At this time, when the temperature sensed by the shape memory alloy spring 3 is high, the shape memory alloy spring 3 stretches and pushes the valve core 2 to move away from the water outlet, and then the seal 9 on the valve core 2 moves away from the water outlet, so that the water outlet is opened for drainage; when the temperature sensed by the shape memory alloy spring 3 is low, the shape memory alloy spring 3 contracts, and the valve core 2 moves towards the water outlet under the action of water flow to squeeze the seal 9, so that the water outlet is in a normally closed state.

[0232] Conversely, when the shape memory alloy spring 3 is located on the side of the valve core 2 relative to the water outlet, that is, between the abutting end 211 of the valve core 2 and the water inlet, at this time, when the temperature sensed by the shape memory alloy spring 3 is high, the shape memory alloy spring 3 stretches and pushes the valve core 2 to move towards the water outlet to squeeze the seal 9, so that the water outlet is in a normally closed state; when the temperature sensed by the shape memory alloy spring 3 is low, the shape memory alloy spring 3 contracts, and at this time, there is a lack of a force to push the valve core 2 away from the water outlet.

[0233] Therefore, the temperature-sensing regulating valve 100 further includes a return spring 4, and the return spring 4 is located on the side of the valve core 2 relative to the shape memory alloy spring 3. When the shape memory alloy spring 3 is located on the side of the valve core 2 relative to the water outlet, the return spring 4 is located between the valve core 2 and the water outlet. In the normal state, through the interaction of the shape memory alloy spring 3 and the return spring 4, the seal 9 is squeezed against the water outlet. When the temperature sensed by the shape memory alloy spring 3 is low, the shape memory alloy spring 3 contracts, and the return spring 4 pushes the valve core 2 to move away from the water outlet, and the water outlet is in an open state for drainage.

[0234] By arranging the return spring 4 and the shape memory alloy spring 3, the temperature-sensing regulating valve 100 can automatically drain water without pipeline pressure, and has stronger practicability.

[0235] Preferably, a blocking member 215 is arranged in the liquid passing cavity 10 near the water inlet, and one of the return spring 4 and the shape memory alloy spring 3 is restricted between the valve core 2 and the blocking member 215.

[0236] Therefore, the temperature-sensitive regulating valve 100 has a normal state and a drainage state. In the normal state, the shape memory alloy spring 3 and the return spring 4 act together on the valve core 2, so that the seal 9 on the valve core 2 abuts against the water outlet, and the water outlet is closed. In the drainage state, the shape memory alloy spring 3 deforms, so as to push the valve core 2 to move under the action of the shape memory alloy spring 3 or the return spring 4, so that the seal 9 on the valve core 2 disengages from the water outlet, and the water outlet is opened.

[0237] In summary, the temperature-sensitive regulating valve 100 of the present invention forms a liquid flow channel between the valve core 2 disposed in the liquid passing cavity 10 and the cavity wall of the liquid passing cavity 10; the shape memory alloy spring 3 abuts against the valve core 2; the return spring 5 is located on one side of the valve core 2 relative to the shape memory alloy spring 4, so that under the combined action of the shape memory alloy spring 4 and the return spring 5 on the valve core 2, the temperature-sensitive regulating valve 100 maintains balance under normal conditions, and after the shape memory alloy spring 4 deforms, under the action of one of the shape memory alloy spring 4 and the return spring 5, the valve core 2 is pushed to move, so as to open or close the water outlet through the movement of the valve core 2, thereby regulating the temperature of the liquid in the liquid passing cavity 10. In addition, because the shape memory alloy spring 4 responds quickly to temperature changes, the response speed of the temperature control drainage valve 100 is improved, it can adapt to temperature changes in a timely manner, reduce the regulation lag phenomenon, and improve the overall efficiency and effect of the system. Moreover, the temperature control drainage valve has a simple structure, is easy to maintain and replace components, has good reliability and adaptability, and can operate stably in different working environments.

[0238] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A temperature-sensitive regulating valve, characterized in that, Comprising: A valve body having a liquid passage cavity; A valve core disposed in the liquid passage cavity; A shape memory alloy spring disposed in the liquid passage cavity and abutted against the valve core, the shape memory alloy spring being configured to sense the temperature of the liquid in the liquid passage cavity to push the valve core and / or the valve body to move.

2. The temperature-sensitive regulating valve according to claim 1, characterized in that, It further includes a return spring disposed in the liquid passage cavity and abutted against one side of the valve core relative to the shape memory alloy spring.

3. The temperature-sensitive regulating valve according to claim 2, characterized in that, The valve core includes a mounting seat and a push rod, and the mounting seat is provided with a connecting portion for connecting the valve body.

4. The temperature-sensitive regulating valve according to claim 3, characterized in that The push rod is movably connected to the mounting seat and includes an abutting end and a limiting end disposed opposite to each other, wherein the abutting end is disposed in the liquid passage cavity.

5. The temperature-sensitive regulating valve according to claim 4, characterized in that, First and second limiting members are provided on both sides of the mounting seat, the first limiting member abuts against the limiting end of the push rod, and the second limiting member abuts against one end of the return spring away from the shape memory alloy spring.

6. The temperature-sensitive regulating valve according to claim 3, characterized in that, The mounting seat is provided with a through hole, the push rod passes through the through hole and is movably connected to the mounting seat, the push rod includes a first end and a second end disposed opposite to each other, and a limiting protrusion is provided between the first end and the second end, and the limiting protrusion is disposed closer to the first end relative to the mounting seat.

7. The temperature-sensitive regulating valve according to claim 6, characterized in that, The shape memory alloy spring is disposed between the limiting protrusion and the mounting seat.

8. The temperature-sensitive regulating valve according to claim 7, wherein First and second limiting members are provided on both sides of the mounting seat, the first end abuts against the first limiting member, the second limiting member is disposed closer to the second end, and the return spring is disposed between the second limiting member and the mounting seat and is configured to drive the mounting seat to move in a direction close to the protruding portion.

9. The temperature-sensitive regulating valve according to claim 8, wherein One end of the return spring abuts against the second limiting member, and the other end abuts against the mounting seat or the valve body.

10. The temperature-sensitive regulating valve according to claim 2, characterized in that, In a direction parallel to the moving direction of the valve body, the length of the return spring is greater than the length of the shape memory alloy spring.

Images