A temperature self-adaptive thermal switch structure based on a nickel-titanium alloy spring

Abstract

The application discloses a temperature self-adaptive thermal switch structure based on a nickel-titanium alloy spring, and relates to the field of heat flow control systems.The temperature self-adaptive thermal switch structure comprises an inner tube, an outer tube is arranged outside the inner tube, and an outer tube end cover is buckled and matched at the opening of the outer tube.The inner tube comprises a shell, a second end tube and a first end tube.The outer tube comprises a conical cylinder and a sleeve pipe.The outer tube end cover comprises a cover and a buckling pipe.A second temperature sensing deformation elastic element is arranged between the sleeve pipe and the second end tube, a first temperature sensing deformation elastic element is arranged between the buckling pipe and the first end tube, and a common elastic element which is squeezed is arranged between the first temperature sensing deformation elastic element and the buckling pipe.The temperature self-adaptive thermal switch structure does not need an external power source, and realizes self-adaptive heat flow control through the deformation characteristics of the temperature sensing deformation elastic element at different temperatures, and has the advantages of not needing an external power source, system simplification, fast response speed and high reliability.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of heat flow control systems, and particularly relates to a temperature adaptive heat switch structure based on a nickel-titanium alloy spring. BACKGROUND

[0002] In modern industrial and vehicle applications, thermal management is a key aspect. Typically, the energy transfer of heat flow needs to be regulated by valves and control systems, which require additional power sources, such as electricity or hydraulic power, to achieve the on-off control of heat flow. This not only increases the complexity and cost of the system, but also brings problems of maintenance and energy consumption.

[0003] For example, in traditional phase change thermal storage systems, the control of heat flow still relies on external power sources and complex control systems, which limits the efficiency and flexibility of its application. In addition, there is also an implementation scheme that uses an electronic temperature control system. The electronic temperature control system uses temperature sensors, electronic controllers, and electric valves to achieve heat flow control. This system has high control accuracy and response speed, but requires continuous power supply, and the system is complex and energy-consuming.

[0004] In summary, the existing heat flow on-off control technology has the following shortcomings:

[0005] 1. High system complexity: Traditional heat flow control systems are usually composed of multiple elements, including valves, sensors, controllers, and power sources. The coordination between these elements requires complex circuit design and programming, making the system design and maintenance cost higher.

[0006] 2. High energy consumption: The existing heat flow control system needs continuous energy supply to maintain its working state, increasing energy consumption, especially in large-scale applications, energy consumption becomes larger.

[0007] 3. Slow response speed: Traditional heat flow control systems have slow response speed when facing temperature changes, making it difficult to meet the needs of some fast-response application scenarios.

[0008] 4. Poor reliability: Due to high system complexity, the failure rate is relatively high, especially in extreme environments, the stability and reliability of traditional systems become a problem. SUMMARY

[0009] The purpose of the present application is to provide a temperature adaptive heat switch structure based on a nickel-titanium alloy spring, which solves the problems of high system complexity, high energy consumption, slow response speed, and poor reliability in the existing heat flow on-off control technology mentioned in the background.

[0010] The present application adopts the following technical solutions:

[0011] The application discloses a temperature self-adaptive thermal switch structure based on a nickel-titanium alloy spring.

[0012] The inner tube comprises a conical shell, a first end tube is arranged at the center of the large-diameter end of the shell, and a second end tube is arranged at the center of the small-diameter end of the shell.

[0013] The outer tube is a conical cylinder structure with one large opening and one small opening, the outer tube comprises a conical cylinder, the conical cylinder is sleeved outside the shell, and a sleeve joint pipe is arranged at the small-diameter end of the conical cylinder and is slidably sleeved outside the second end tube.

[0014] The outer tube end cover is a boss type shell structure, the outer tube end cover comprises a cover, the cover is in a sealing buckle with the conical cylinder, a sealing buckle pipe is arranged on the cover and is slidably sleeved outside the first end tube.

[0015] The sleeve joint pipe is internally provided with a second temperature sensing deformation elastic element.

[0016] The sealing buckle pipe is internally provided with a first temperature sensing deformation elastic element, a common elastic element is arranged between the first temperature sensing deformation elastic element and the sealing buckle pipe, and the two ends of the common elastic element are respectively abutted against the outer wall of the shell and the end inner wall of the sealing buckle pipe.

[0017] Further, the first temperature sensing deformation elastic element is a high-temperature phase change nickel-titanium alloy spring, the second temperature sensing deformation elastic element is a low-temperature phase change nickel-titanium alloy spring, and the common elastic element is a common spring.

[0018] The first temperature sensing deformation elastic element is sleeved outside the first end tube, and the inner diameter of the first temperature sensing deformation elastic element is the same as the outer diameter of the first end tube.

[0019] The second temperature sensing deformation elastic element is sleeved outside the second end tube, and the inner diameter of the second temperature sensing deformation elastic element is the same as the outer diameter of the second end tube.

[0020] Further, the first temperature sensing shape memory elastic element can sense the temperature of the fluid in the pipe, and when the temperature is higher than the first phase transition temperature, the first temperature sensing shape memory elastic element is in a phase transition elongation state to a first set length state, and when the temperature is lower than the first phase transition temperature, the first temperature sensing shape memory elastic element is in a phase transition shortening state to a second set length state; the second temperature sensing shape memory elastic element can sense the temperature of the fluid in the pipe, and when the temperature is higher than the second phase transition temperature, the second temperature sensing shape memory elastic element is in a phase transition elongation state to a third set length state, and when the temperature is lower than the second phase transition temperature, the second temperature sensing shape memory elastic element is in a phase transition shortening state to a fourth set length state.

[0021] Further, the first phase transition temperature is higher than the second phase transition temperature. When the temperature of the fluid in the inner pipe is lower than the second phase transition temperature, the first temperature sensing shape memory elastic element and the second temperature sensing shape memory elastic element are both in a shortening state, the free end of the first temperature sensing shape memory elastic element is not in contact with the outer wall of the shell, and the free end of the second temperature sensing shape memory elastic element is not in contact with the outer wall of the shell, at this time, the outer wall of the shell is in contact with the inner wall of the cone under the elastic force of the common elastic element.

[0022] When the temperature of the fluid in the inner pipe is between the second phase transition temperature and the first phase transition temperature, the first temperature sensing shape memory elastic element is in a shortening state, the free end of the first temperature sensing shape memory elastic element is not in contact with the outer wall of the shell, the second temperature sensing shape memory elastic element is in a phase transition elongation state, the second temperature sensing shape memory elastic element generates an elastic force on the outer wall of the shell and overcomes the elastic force of the common elastic element, so that the outer wall of the shell is separated from the inner wall of the cone.

[0023] When the temperature of the fluid in the inner pipe is higher than the first phase transition temperature, the second temperature sensing shape memory elastic element and the first temperature sensing shape memory elastic element are both in a phase transition elongation state, the free end of the second temperature sensing shape memory elastic element is in contact with the outer wall of the shell and generates an elastic force, and the free end of the first temperature sensing shape memory elastic element is in contact with the outer wall of the shell and generates an elastic force, at this time, the elastic force of the first temperature sensing shape memory elastic element and the elastic force of the common elastic element jointly overcome the elastic force generated by the second temperature sensing shape memory elastic element on the outer wall of the shell, so that the outer wall of the shell is in contact with the inner wall of the cone.

[0024] Compared with the prior art, the beneficial technical effects of the present application are as follows:

[0025] The temperature self-adaptive thermal switch structure based on the nickel-titanium alloy spring provided by the present application does not require an external power source, and realizes self-adaptive thermal flow control through the deformation characteristics of the nickel-titanium alloy spring at different temperatures. Compared with the prior art, the present application has the following advantages:

[0026] 1. No external power source required: Utilizing the shape deformation characteristics of nickel-titanium alloy springs with temperature, no additional power or hydraulic source is required, saving system energy consumption.

[0027] 2. System simplification: Reduces the use of sensors and controllers, and the system structure is simpler.

[0028] 3. Fast response speed: The nickel-titanium alloy spring has a fast response to temperature changes, enabling fast heat flow control.

[0029] 4. High reliability: Fewer mechanical components in the system, reducing failure points and improving system reliability.

[0030] This new type of temperature adaptive thermal switch structure can be widely used in various industrial and vehicle thermal management fields that require precise heat flow control, especially in power-free or energy-constrained environments. BRIEF DESCRIPTION OF DRAWINGS

[0031] The present application will be further described below in conjunction with the drawings.

[0032] Figure 1 An appearance view of the temperature adaptive thermal switch structure based on nickel-titanium alloy springs according to the present application;

[0033] Figure 2 A main structure schematic view of the temperature adaptive thermal switch structure based on nickel-titanium alloy springs according to the present application;

[0034] Figure 3 A detailed structure view of the temperature adaptive thermal switch structure based on nickel-titanium alloy springs according to the present application;

[0035] Figure 4 A working principle schematic view of the present application.

[0036] Explanation of reference numerals: 1, inner tube; 1-1, housing; 1-2, second end tube; 1-3, first end tube; 2, outer tube; 2-1, cone; 2-2, sleeve tube; 3, outer tube end cover; 3-1, cover; 3-2, seal tube; 4, ordinary elastic element; 5, first temperature sensing deformation elastic element; 6, second temperature sensing deformation elastic element. DETAILED DESCRIPTION

[0037] In order to make the technical problems, technical solutions and beneficial effects of the present application more clear and explicit, the present application will be further described in detail below in conjunction with the drawings and examples.

[0038] As Figure 1As shown, the embodiment discloses a temperature self-adaptive thermal switch structure based on a nickel-titanium alloy spring, which comprises an inner tube 1, an outer tube 2 sleeved outside the inner tube 1, and an outer tube end cover 3 buckled and matched at the opening of the outer tube 2.

[0039] As shown, the inner tube 1 comprises a conical shell 1-1, a first end tube 1-3 communicated and arranged at the center of the large-diameter end of the shell 1-1, and a second end tube 1-2 communicated and arranged at the center of the small-diameter end of the shell 1-1. Figures 2-3

[0040] The outer tube 2 is a conical cylinder structure with one large opening and one small opening, which comprises a conical cylinder 2-1 sleeved outside the shell 1-1, and a sleeve pipe 2-2 communicated and arranged at the small-diameter end of the conical cylinder 2-1, and the sleeve pipe 2-2 is slidably sleeved outside the second end tube 1-2.

[0041] The outer tube end cover 3 is a boss type shell structure, which comprises a cover 3-1 buckled and matched with the conical cylinder 2-1, and a buckling pipe 3-2 arranged on the cover 3-1 and slidably sleeved outside the first end tube 1-3.

[0042] The sleeve pipe 2-2 is internally provided with a second temperature sensing deformation elastic element 6.

[0043] The buckling pipe 3-2 is internally provided with a first temperature sensing deformation elastic element 5, and a common elastic element 4 arranged between the first temperature sensing deformation elastic element 5 and the buckling pipe 3-2 and squeezed, and the two ends of the common elastic element 4 respectively abut against the outer wall of the shell 1-1 and the inner wall of the end of the buckling pipe 3-2. The common elastic element 4 is used to provide basic mechanical elastic support and provide a force to push the inner tube 1 and the outer tube 2 to engage when the temperature changes.

[0044] In the embodiment, the first temperature sensing deformation elastic element 5 is a high-temperature phase transition nickel-titanium alloy spring, the second temperature sensing deformation elastic element 6 is a low-temperature phase transition nickel-titanium alloy spring, and the common elastic element 4 is a common spring.

[0045] The first temperature sensing deformation elastic element 5 is sleeved outside the first end tube 1-3, and the inner diameter of the first temperature sensing deformation elastic element 5 is the same as the outer diameter of the first end tube 1-3. The first temperature sensing deformation elastic element 5 can sense the temperature of the fluid in the pipe, and when the temperature is higher than the first phase transition temperature, the first temperature sensing deformation elastic element 5 is phase transitioned to a first set length state, and when the temperature is lower than the first phase transition temperature, the first temperature sensing deformation elastic element 5 is phase transitioned to a second set length state. In the embodiment, the first set length state and the second set length state of the first temperature sensing deformation elastic element 5 are obtained through experimental training.

[0046] ​The second temperature-sensitive deformable elastic element 6 is mounted on the outside of the second end tube 1-2. The inner diameter of the second temperature-sensitive deformable elastic element 6 is the same as the outer diameter of the second end tube 1-2. The second temperature-sensitive deformable elastic element 6 senses the temperature of the fluid within the tube. When the temperature is above the second phase transition temperature, the second temperature-sensitive deformable elastic element 6 undergoes a phase transition and extends to a third set length. When the temperature is below the second phase transition temperature, the second temperature-sensitive deformable elastic element 6 undergoes a phase transition and shortens to a fourth set length. In this embodiment, the third and fourth set lengths of the second temperature-sensitive deformable elastic element 6 are determined through experimental training.

[0047] The first phase transition temperature is higher than the second phase transition temperature.

[0048] When the temperature of the fluid in the inner tube 1 is lower than the second phase transition temperature, the first temperature-sensitive deformation elastic element 5 and the second temperature-sensitive deformation elastic element 6 are both in a shortened state. The free end of the first temperature-sensitive deformation elastic element 5 does not contact the outer wall of the shell 1-1, and the free end of the second temperature-sensitive deformation elastic element 6 does not contact the outer wall of the shell 1-1. At this time, the outer wall of the shell 1-1 is in contact with the inner wall of the cone 2-1 under the elastic force of the common elastic element 4.

[0049] When the temperature of the fluid in the inner tube 1 is between the second phase transition temperature and the first phase transition temperature, the first temperature-sensitive deformable elastic element 5 is in a shortened state, and the free end of the first temperature-sensitive deformable elastic element 5 is not in contact with the outer wall of the shell 1-1. The second temperature-sensitive deformable elastic element 6 is phase-changed and extended. The second temperature-sensitive deformable elastic element 6 generates an elastic force on the outer wall of the shell 1-1 and overcomes the elastic force of the ordinary elastic element 4, so that the outer wall of the shell 1-1 is separated from the inner wall of the cone 2-1.

[0050] When the temperature of the fluid in the inner tube 1 is higher than the first phase change temperature, the second temperature-sensing deformation elastic element 6 and the first temperature-sensing deformation elastic element 5 both phase-change and elongate, the free end of the second temperature-sensing deformation elastic element 6 contacts the outer wall of the shell 1-1 and generates an elastic force, and the free end of the first temperature-sensing deformation elastic element 5 contacts the outer wall of the shell 1-1 and generates an elastic force. At this time, the elastic force of the first temperature-sensing deformation elastic element 5 and the elastic force of the ordinary elastic element 4 jointly overcome the elastic force generated by the second temperature-sensing deformation elastic element 6 on the outer wall of the shell 1-1, so that the outer wall of the shell 1-1 contacts the inner wall of the cone 2-1.

[0051] In this embodiment, Figure 4 As shown in the example, the first phase transition temperature is 50°, and the second phase transition temperature is 10°.

[0052] like Figures 1-4 As shown, the working principle of the present invention is as follows:

[0053] When the fluid temperature in the inner tube 1 is lower than the second phase transition temperature, the first temperature-sensitive shape-changing elastic element 5 and the second temperature-sensitive shape-changing elastic element 6 are both in the shortened state, the free end of the first temperature-sensitive shape-changing elastic element 5 is not in contact with the outer wall of the shell 1-1, and the free end of the second temperature-sensitive shape-changing elastic element 6 is not in contact with the outer wall of the shell 1-1, at this time, only the ordinary spring 4 provides the thrust, the outer wall of the shell 1-1 is in contact with the inner wall of the tapered cylinder 2-1 under the elastic force of the ordinary elastic element 4, the thermal switch is turned on, and heat is absorbed from the outside (such as a phase change heat storage material), so that the temperature of the fluid in the tube is increased.

[0054] When the fluid temperature in the inner tube 1 is between the second phase transition temperature and the first phase transition temperature, the first temperature-sensitive shape-changing elastic element 5 is in the shortened state, the free end of the first temperature-sensitive shape-changing elastic element 5 is not in contact with the outer wall of the shell 1-1, and the second temperature-sensitive shape-changing elastic element 6 is phase transition elongated, the second temperature-sensitive shape-changing elastic element 6 generates an elastic force on the outer wall of the shell 1-1 and overcomes the elastic force of the ordinary elastic element 4, so that the outer wall of the shell 1-1 is separated from the inner wall of the tapered cylinder 2-1, the thermal switch is turned off, and the fluid in the inner tube 1 is heat-preserved.

[0055] When the fluid temperature in the inner tube 1 is higher than the first phase transition temperature, the second temperature-sensitive shape-changing elastic element 6 and the first temperature-sensitive shape-changing elastic element 5 are both phase transition elongated, the free end of the second temperature-sensitive shape-changing elastic element 6 is in contact with the outer wall of the shell 1-1 and generates an elastic force, and the free end of the first temperature-sensitive shape-changing elastic element 5 is in contact with the outer wall of the shell 1-1 and generates an elastic force, at this time, the elastic force of the first temperature-sensitive shape-changing elastic element 5 and the elastic force of the ordinary elastic element 4 jointly overcome the elastic force of the second temperature-sensitive shape-changing elastic element 6 on the outer wall of the shell 1-1, so that the outer wall of the shell 1-1 is in contact with the inner wall of the tapered cylinder 2-1, the thermal switch is turned on, and the fluid in the inner tube 1 transfers heat to the outside (such as a phase change heat storage material), so that the temperature of the fluid in the inner tube 1 is decreased.

[0056] The present application realizes temperature self-adaptive heat flow control without external power source by using the temperature phase transition characteristics of nickel-titanium alloy, and is particularly suitable for heat flow control in a phase change material heat storage module. The phase change material will undergo a physical state change when absorbing or releasing heat, and through the temperature self-adaptive thermal switch structure of the present application, a heat switch structure for adaptive adjustment of heat absorption, heat preservation and heat dissipation is realized, and wide-range temperature self-adaptation is realized.

[0057] The above-described embodiments are only used to describe the preferred modes of the present application, and do not limit the scope of the present application, and various modifications and improvements to the technical solutions of the present application made by those skilled in the art without departing from the design spirit of the present application shall fall within the protection scope defined by the claims of the present application.

Claims

1. A temperature-adaptive thermal switch structure based on a nickel-titanium alloy spring, characterized in that: It comprises an inner tube (1), an outer tube (2) is sleeved on the outer side of the inner tube (1), and an outer tube end cap (3) is fitted at the opening of the outer tube (2); The inner tube (1) comprises a frustum-shaped shell (1-1), a first end tube (1-3) is provided at the center of the large-diameter end of the shell (1-1), and a second end tube (1-2) is provided at the center of the small-diameter end of the shell (1-1). The outer tube (2) is a conical tube-shaped structure with a large opening on one side and a small opening on the other side. The outer tube (2) comprises a conical tube (2-1), the conical tube (2-1) is sleeved on the outside of the shell (1-1), and a communicating sleeve tube (2-2) is provided at the small-diameter end of the conical tube (2-1), and the sleeve tube (2-2) is slidably sleeved on the outside of the second end tube (1-2); The outer tube end cover (3) is a boss-type shell structure, and the outer tube end cover (3) includes a sealing cover (3-1), the sealing cover (3-1) is engaged with the cone (2-1), and a sealing tube (3-2) is provided on the sealing cover (3-1), and the sealing tube (3-2) is slidably sleeved on the outer side of the first end tube (1-3); A second temperature-sensitive deformation elastic element (6) is provided in the sleeve tube (2-2); A first temperature-sensitive deformation elastic element (5) is provided in the sealing tube (3-2), and a squeezed common elastic element (4) is provided between the first temperature-sensitive deformation elastic element (5) and the sealing tube (3-2), with both ends of the common elastic element (4) respectively contacting the outer wall of the shell (1-1) and the inner wall of the end of the sealing tube (3-2); The first temperature-sensitive deformation elastic element (5) is a high-temperature phase-change nickel-titanium alloy spring; The second temperature-sensitive deformation elastic element (6) is a low-temperature phase-change nickel-titanium alloy spring; The first temperature-sensitive deformation elastic element (5) is sleeved on the outside of the first end tube (1-3), and the inner diameter of the first temperature-sensitive deformation elastic element (5) is the same as the outer diameter of the first end tube (1-3); The second temperature-sensitive deformation elastic element (6) is sleeved on the outside of the second end tube (1-2), and the inner diameter of the second temperature-sensitive deformation elastic element (6) is the same as the outer diameter of the second end tube (1-2).

2. The temperature-adaptive thermal switch structure based on a nickel-titanium alloy spring according to claim 1, characterized in that: The first temperature-sensitive deformable elastic element (5) senses the temperature of the fluid in the tube. When the temperature is higher than a first phase transition temperature, the first temperature-sensitive deformable elastic element (5) undergoes a phase transition and stretches to a first set length state. When the temperature is lower than the first phase transition temperature, the first temperature-sensitive deformable elastic element (5) undergoes a phase transition and shortens to a second set length state. The second temperature-sensitive deformable elastic element (6) senses the temperature of the fluid in the tube. When the temperature is higher than the second phase transition temperature, the second temperature-sensitive deformable elastic element (6) undergoes phase transition and stretches to a third set length state. When the temperature is lower than the second phase transition temperature, the second temperature-sensitive deformable elastic element (6) undergoes phase transition and shortens to a fourth set length state.

3. The temperature-adaptive thermal switch structure based on a nickel-titanium alloy spring according to claim 2, characterized in that: The first phase transition temperature is higher than the second phase transition temperature; When the temperature of the fluid in the inner tube (1) is lower than the second phase change temperature, the first temperature-sensitive deformation elastic element (5) and the second temperature-sensitive deformation elastic element (6) are both in a shortened state, the free end of the first temperature-sensitive deformation elastic element (5) does not contact the outer wall of the shell (1-1), and the free end of the second temperature-sensitive deformation elastic element (6) does not contact the outer wall of the shell (1-1). At this time, the outer wall of the shell (1-1) contacts the inner wall of the cone (2-1) under the elastic force of the common elastic element (4); When the temperature of the fluid in the inner tube (1) is between the second phase change temperature and the first phase change temperature, the first temperature-sensitive deformation elastic element (5) is in a shortened state, the free end of the first temperature-sensitive deformation elastic element (5) is not in contact with the outer wall of the shell (1-1), the second temperature-sensitive deformation elastic element (6) is phase-changed and extended, and the second temperature-sensitive deformation elastic element (6) generates an elastic force on the outer wall of the shell (1-1) and overcomes the elastic force of the ordinary elastic element (4), so that the outer wall of the shell (1-1) is separated from the inner wall of the cone (2-1); When the temperature of the fluid in the inner tube (1) is higher than the first phase change temperature, the second temperature-sensitive deformation elastic element (6) and the first temperature-sensitive deformation elastic element (5) both undergo phase change and stretch, the free end of the second temperature-sensitive deformation elastic element (6) contacts the outer wall of the shell (1-1) and generates an elastic force, and the free end of the first temperature-sensitive deformation elastic element (5) contacts the outer wall of the shell (1-1) and generates an elastic force. At this time, the elastic force of the first temperature-sensitive deformation elastic element (5) and the elastic force of the common elastic element (4) jointly overcome the elastic force generated by the second temperature-sensitive deformation elastic element (6) on the outer wall of the shell (1-1), so that the outer wall of the shell (1-1) contacts the inner wall of the cone (2-1).

4. The temperature-adaptive thermal switch structure based on a nickel-titanium alloy spring according to claim 1, characterized in that: The common elastic element (4) is a common spring.

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