Dry-burning-resistant temperature sensor

Abstract

The utility model belongs to the technical field of temperature sensors, and discloses an anti-dry-burning temperature sensor, which comprises a lead, a glass fiber self-extinguishing sleeve is sleeved outside the lead, a guide cylinder is sleeved outside the glass fiber self-extinguishing sleeve, one end of the guide cylinder is sleeved with an installation sleeve, and the other end of the guide cylinder is sleeved with an anti-dry-burning temperature sensor. A fixing plate is mounted on the outer wall of the end, located in the mounting sleeve, of the guide cylinder, a spring is connected between the fixing plate and the mounting sleeve, a movable rod is connected into the mounting sleeve, a hollow pipe is arranged at one end of the outer wall of the movable rod in a sleeving mode, the movable rod is connected with a rope body, and a rope winding assembly is arranged on one side of the hollow pipe. When the gas stove is started, the motor drives the winding drum to rotate, the rope body is released, the button cover is tightly attached to the bottom of the cooker, and accurate temperature sensing is ensured. And during closing, the button cover automatically retracts, physical damage is avoided, and reliability is improved. And the retracted button cover provides protection for the thermosensitive element, so that the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to temperature sensor technical field, concretely relates to a dry burning prevention temperature sensor. BACKGROUND

[0002] The dry burning prevention temperature sensor is a safety device for preventing electric appliances (such as gas stoves, electric kettles, electric rice cookers, etc.) from continuing to heat in the absence of water or abnormal conditions, which may cause dry burning accidents. Its core function is to monitor the temperature and automatically cut off the power or gas source in abnormal conditions, thereby protecting the safety of the equipment and the user.

[0003] In the application number 202122190800.2, a high-temperature-resistant dry burning prevention temperature sensor is disclosed. After installation, the shell can be extended or retracted relative to the guide rod. When using, the guide rod is fixed on the gas stove, then the wire is connected to the circuit board of the gas stove, and the circuit of the gas stove is set. When the cookware is placed on the gas stove, the cookware will press on the button cover of the temperature measuring head, and the shell will shrink relative to the guide rod, thereby ensuring that the button cover is completely attached to the bottom of the cookware. In the above design, the button cover is always exposed by the spring. When the device is not in use, the button cover is still vulnerable to impact from external objects. For example, in a kitchen environment, cookware or other kitchen utensils may accidentally collide with the sensor, causing the button cover to deform or be damaged. In addition, the exposed button cover is prone to accumulate dust and moisture, which will gradually penetrate into the sensor, affecting the accuracy and sensitivity of the thermosensitive element. In addition, in terms of heat insulation, if only a single heat insulation sleeve is provided on the outside, this design has certain limitations in terms of heat insulation effect. A single heat insulation sleeve cannot effectively block the transfer of external heat to internal components, which may cause the internal temperature of the sensor to be too high when working in a high-temperature environment, thereby affecting the stability and reliability of the sensor. SUMMARY

[0004] The utility model aims at providing a dry burning prevention temperature sensor to solve the problem of the button cover being always exposed, vulnerable to impact and deformation, and accumulating dust and moisture, which affects the service life; a single heat insulation sleeve cannot effectively block the heat, causing the internal temperature of the sensor to be too high in high-temperature environment, affecting its stability and reliability.

[0005] In order to achieve the above object, the utility model provides the following technical scheme: A dry -burning prevention temperature sensor, include: dry -burning prevention temperature sensor's wire, the outside of wire is equipped with glass fiber self -extinguishing sleeve, the outside of glass fiber self -extinguishing sleeve is equipped with guide cylinder, one end of guide cylinder is equipped with installation sleeve, the outer wall of installation sleeve is connected with installation block, the outer wall of installation block is equipped with installation groove, hot -wire element is installed in installation groove, hot -wire element is connected with heat conduction block, the lateral wall of heat conduction block is connected with button cover,

[0006] The outer wall of one end of the guide cylinder inside the installation sleeve is provided with a fixed plate, a spring is connected between the fixed plate and the installation sleeve, a movable rod is connected in the installation sleeve, a hollow pipe is sleeved on one end of the outer wall of the movable rod, the movable rod is connected with a rope body, and a rope winding assembly is arranged on one side of the hollow pipe.

[0007] Preferably, the rope winding assembly comprises a winding drum and a motor, the winding drum is arranged on one side of the hollow pipe, the rope body is wound on the outer wall of the winding drum through the hollow pipe, the motor is arranged on one side of the winding drum, a rotating shaft is connected between the winding drum and the motor, a protective cover is sleeved on the outer side of the winding drum and the motor, the protective cover is provided with a through groove, the rope body passes through the through groove, and a plurality of rolling assemblies are arranged between the rope body and the through groove.

[0008] The rolling assembly comprises a rolling groove and a rolling ball, the rolling groove is formed in the inner wall of the through groove, and the rolling ball is installed in the rolling groove.

[0009] The inner wall of the installation groove is provided with a threaded groove, the outer wall of the button cover is provided with an external thread, and the threaded groove and the external thread are matched.

[0010] The outer side of the installation sleeve is provided with a first heat insulation sleeve, the outer side of the first heat insulation sleeve is provided with a second heat insulation sleeve, and the outer side of the second heat insulation sleeve is provided with a third heat insulation sleeve.

[0011] Through the above technical scheme:

[0012] In use, the thermosensitive element is electrically connected to the control circuit of the gas stove through the wire. The button cover works with the thermosensitive element to ensure accurate temperature sensing and transfers heat to the thermosensitive element through the heat-conducting block. The wire serves as a transmission medium to transmit electrical signals to the control circuit of the gas stove. After receiving the electrical signal, the control circuit makes a judgment according to the preset program and temperature threshold. If the temperature exceeds the set safety threshold, the control circuit will trigger a protection mechanism, such as cutting off the gas supply or power supply, to prevent dry burning accidents. The wire is wrapped with a glass fiber self-extinguishing sleeve to provide insulation protection and has self-extinguishing characteristics, which can improve safety and prevent fires caused by overheating. The glass fiber self-extinguishing sleeve is wrapped around the outside of the wire, covering the wire. Not only does it ensure that the wire safely and stably transmits electrical signals in high-temperature environments, but it also self-extinguishes at high temperatures to prevent the spread of fire.

[0013] The thermosensitive element is responsible for sensing the temperature changes at the bottom of the cookware and transmitting temperature signals to the control circuit of the gas stove through the wire. The motor is electrically connected to the switch of the gas stove to realize linkage with the working state of the gas stove. When the gas stove is turned on, the motor drives the reel to rotate clockwise through the shaft. As the reel rotates, the rope is released and extends outward through the hollow tube. At this time, the spring provides elastic force to ensure that the button cover can tightly fit the bottom of the cookware, ensuring the accuracy of temperature sensing. The movable rod moves freely in the hollow tube and is pulled by the rope to move the mounting sleeve and the button cover towards the bottom of the cookware.

[0014] When the gas stove is turned off, the motor drives the reel to rotate counterclockwise through the shaft. The rotation of the reel causes the rope to be wound and pulls the movable rod to move inward through the rope. The movement of the movable rod brings the button cover back into the first heat insulation sleeve. After the button cover is retracted into the first heat insulation sleeve, it is no longer exposed to the external environment, effectively avoiding physical damage caused by external impact or misoperation. For example, in a kitchen environment, the cookware or other objects may accidentally collide with the sensor, but the retracted button cover is protected by the first heat insulation sleeve, avoiding such risks.

[0015] The thermosensitive element is usually sensitive and precise, and the retracted button cover provides an additional layer of protection for it, preventing it from being affected by dust, moisture or other environmental factors when not in use, thereby prolonging its service life. The button cover is retracted in time when the gas stove is turned off, reducing the time it is completely exposed. This not only reduces the risk of burns caused by accidental contact, but also prevents the button cover from aging or deforming due to long-term exposure to high-temperature environments. By reducing the exposure time of the button cover, material fatigue caused by long-term exposure to high-temperature, high-humidity or corrosive environments can be reduced, thereby prolonging the service life of the entire sensor.

[0016] The rope body enters and exits in the through slot in the protective cover. The inner wall of the through slot is provided with a rolling groove, and a ball is installed in the rolling groove. When the rope body moves, the ball rolls in the rolling groove, effectively reducing friction and the possibility of rope jamming, ensuring the smoothness of the sensor action.

[0017] When maintenance or replacement is required, simply unscrew the button cover. Through the interaction of the threaded groove and the external thread, the button cover can be quickly disassembled and replaced. This design not only simplifies the maintenance process, but also improves the maintainability of the sensor, thereby prolonging its service life.

[0018] By optimizing the connection method of the thermal element and the wire, implementing the linkage design of the motor and the gas stove, introducing the ball friction reduction mechanism, and simplifying the disassembly and replacement process of the button cover, this dry burning prevention temperature sensor not only improves its working reliability and safety, but also enhances its maintainability and user experience. This design ensures that the sensor can work stably and efficiently in various use scenarios, providing a safer cooking environment for users.

[0019] The third heat insulation sleeve is in the shape of a circular truncated cone, with its small end adjacent to one end of the button cover, and the outer surface of the third heat insulation sleeve is provided with a wavy pattern;

[0020] Preferably, the first heat insulation sleeve is connected to the guide cylinder, the hollow tube is connected to the first heat insulation sleeve, and the protective cover is connected to the first heat insulation sleeve.

[0021] Through the above technical solutions:

[0022] In use, the first heat insulation sleeve is directly fitted outside the mounting sleeve as the innermost heat insulation layer, providing the first layer of heat insulation protection, which can effectively reduce the heat transfer from the external environment to the mounting sleeve. Through this heat insulation effect, the components inside the mounting sleeve can be protected from high temperature, ensuring that the sensor can work normally in a high temperature environment.

[0023] In order to achieve efficient heat insulation effect, the first heat insulation sleeve is made of materials with low thermal conductivity, such as ceramic fiber and glass fiber. These materials can significantly reduce heat conduction, ensuring that internal components are not affected by high temperature. At the same time, the selected materials need to have the characteristics of high temperature resistance, so as to ensure that there will be no material aging or performance degradation in the case of continuous high temperature environment. In addition, ceramic fiber and glass fiber materials have relatively low cost, suitable for large-scale production; and these materials are usually light, which will not significantly increase the overall weight of the sensor, so as not to affect the installation and use of the sensor.

[0024] The second thermal insulation sleeve is wrapped outside the first thermal insulation sleeve, serving as an intermediate thermal insulation layer. It further increases the number of thermal insulation layers, forming a multi-layer thermal insulation structure, effectively reducing heat conduction. Through this design, the second thermal insulation sleeve can provide stronger thermal insulation capacity, further reducing heat transfer, ensuring that the internal components are more fully protected.

[0025] In order to maintain stable thermal insulation performance in long-term high-temperature environments, the second thermal insulation sleeve is made of high-thermal-stability materials such as high-temperature alloys and composite thermal insulation materials. These materials not only have excellent thermal insulation performance, but also effectively prevent material aging or performance degradation. Moreover, high-temperature alloys and composite thermal insulation materials generally have high mechanical strength, providing better structural support for the sensor, ensuring stable performance under various use conditions. At the same time, these materials have excellent durability and can be used for a long time without failure in harsh environments.

[0026] The third thermal insulation sleeve is wrapped outside the second thermal insulation sleeve, serving as the outermost thermal insulation layer. The third thermal insulation sleeve is in the shape of a circular truncated cone, with its small base end close to one end of the button cover. This design makes the end close to the heat source have a smaller contact area, thereby reducing heat transfer. The circular truncated cone-shaped third thermal insulation sleeve not only increases the thickness of the thermal insulation layer, but also optimizes the heat distribution and transfer path through its unique shape design. This circular truncated cone design provides better mechanical strength and stability, ensuring that the thermal insulation sleeve does not deform due to thermal expansion in high-temperature environments. Since the small base end is close to the heat source, the contact area is reduced, thus effectively reducing heat transfer.

[0027] In addition, the wavy pattern increases the surface area of the third thermal insulation sleeve, enhancing the contact area with air, thereby improving convective heat dissipation efficiency. The wavy pattern can also effectively disperse thermal stress, reducing material fatigue and deformation caused by temperature changes, ensuring stable performance of the thermal insulation sleeve during long-term use.

[0028] As the outermost layer, the third thermal insulation sleeve needs to directly face the external high-temperature environment, so it needs to be made of materials that are resistant to high temperatures and corrosion, such as stainless steel, titanium alloy, or ceramic materials. Choosing materials with high thermal reflectivity can reflect part of the heat radiation, further reducing heat absorption and improving thermal insulation effect. At the same time, the outer layer material needs to have high mechanical strength to provide structural support and protect the internal thermal insulation layer.

[0029] In summary, by adopting a multi-layer thermal insulation structure design and reasonably selecting the materials and shapes of each sleeve, the dry-burning temperature sensor can provide efficient thermal protection in high-temperature environments, ensuring that the internal components are not affected by high temperatures. This design not only improves the safety of the sensor, but also prolongs its service life, ensuring stable operation in various harsh environments.

[0030] Compared with the prior art, the utility model has the advantages of

[0031] (1) the utility model discloses the cooperation of motor, reel and spring, realizes the automatic expansion and contraction of button cover in the first heat insulation sleeve. When the gas stove is opened, the motor drives the reel to rotate, releases the rope body, makes the button cover closely adhere to the bottom of the cooker, and ensures accurate temperature sensing. When closing, the button cover is automatically retracted, avoids physical damage, and improves reliability. The retracted button cover provides protection for the thermosensitive element, prevents environmental factors from affecting, and prolongs the service life. In addition, timely retraction reduces the exposure time in the high-temperature environment, reduces material fatigue, and further prolongs the service life of the sensor.

[0032] (2) the utility model discloses the cooperation of first heat insulation sleeve, second heat insulation sleeve and third heat insulation sleeve, provides efficient heat protection, when using, the first heat insulation sleeve uses the ceramic fiber and glass fiber material with low thermal conductivity, reduces heat transfer, and protects the internal components;The second heat insulation sleeve adopts high thermal stability material, further reduces heat conduction, and provides stronger heat insulation;The third heat insulation sleeve is in the shape of a circular truncated cone, reduces the fire contact area, optimizes the heat distribution, improves the overall heat insulation efficiency, and ensures that the sensor works stably and reliably in the high-temperature environment. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 It is the structural schematic diagram of the utility model;

[0034] Figure 2 It is the structural appearance diagram of the utility model;

[0035] Figure 3 It is the structural schematic diagram of the spring of the utility model;

[0036] Figure 4 It is the structural schematic diagram of the thread groove of the utility model;

[0037] Figure 5 It is the structural schematic diagram of the movable rod of the utility model;

[0038] Figure 6 It is the structural schematic diagram of the rotating shaft of the utility model;

[0039] Figure 7 It is the structural schematic diagram of the ball of the utility model;

[0040] In the figure: 1, wire; 2, glass fiber self-extinguishing sleeve; 3, guide cylinder; 4, mounting sleeve; 5, mounting block; 6, mounting groove; 7, button cover; 8, thermal element; 9, heat conducting block; 10, threaded groove; 11, external thread; 12, fixed plate; 13, spring; 14, hollow tube; 15, movable rod; 16, rope body; 17, winding drum; 18, motor; 19, rotating shaft; 20, protective cover; 21, through groove; 22, rolling groove; 23, ball; 24, first heat insulation sleeve; 25, second heat insulation sleeve; 26, third heat insulation sleeve. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0042] Please refer to Figures 1-7 The utility model provides the following technical scheme: a dry combustion prevention temperature sensor, which comprises: a wire 1 of the dry combustion prevention temperature sensor, a glass fiber self-extinguishing sleeve 2 is sleeved on the outer side of the wire 1, a guide cylinder 3 is sleeved on the outer side of the glass fiber self-extinguishing sleeve 2, a mounting sleeve 4 is sleeved on one end of the guide cylinder 3, a mounting block 5 is connected to the outer wall of the mounting sleeve 4, a mounting groove 6 is formed in the outer wall of the mounting block 5, a thermal element 8 is installed in the mounting groove 6, the thermal element 8 is connected to a heat conducting block 9, and the heat conducting block 9 is connected to a button cover 7.

[0043] A fixed plate 12 is installed on the outer wall of one end of the guide cylinder 3 inside the mounting sleeve 4, a spring 13 is connected between the fixed plate 12 and the mounting sleeve 4, a movable rod 15 is connected in the mounting sleeve 4, a hollow tube 14 is sleeved on one end of the outer wall of the movable rod 15, the movable rod 15 is connected to a rope body 16, and a winding assembly is arranged on one side of the hollow tube 14.

[0044] Further, the winding assembly comprises a winding drum 17 and a motor 18, the winding drum 17 is arranged on one side of the hollow tube 14, the rope body 16 is wound around the outer wall of the winding drum 17 through the hollow tube 14, the motor 18 is arranged on one side of the winding drum 17, a rotating shaft 19 is connected between the winding drum 17 and the motor 18, a protective cover 20 is sleeved on the outer side of the winding drum 17 and the motor 18, the protective cover 20 is provided with a through groove 21, the rope body 16 passes through the through groove 21, and a plurality of rolling assemblies are arranged between the rope body 16 and the through groove 21.

[0045] The rolling assembly comprises a rolling groove 22 and a ball 23, the rolling groove 22 is formed in the inner wall of the through groove 21, and the ball 23 is installed in the rolling groove 22.

[0046] The inner wall of the mounting groove 6 is provided with a threaded groove 10, and the outer wall of the button cover 7 is provided with an external thread 11, which are matched with each other.

[0047] The outer side of the mounting sleeve 4 is provided with a first heat insulation sleeve 24, the outer side of the first heat insulation sleeve 24 is provided with a second heat insulation sleeve 25, and the outer side of the second heat insulation sleeve 25 is provided with a third heat insulation sleeve 26.

[0048] Through the above technical scheme:

[0049] In use, the thermosensitive element 8 is electrically connected to the control circuit of the gas stove through the wire 1. The button cover 7 cooperates with the thermosensitive element 8 to ensure accurate temperature sensing and transfers heat to the thermosensitive element 8 through the heat-conducting block 9. The wire 1 serves as a transmission medium to transmit electrical signals to the control circuit of the gas stove. After receiving the electrical signals, the control circuit makes a judgment according to the preset program and temperature threshold. If the temperature exceeds the set safety threshold, the control circuit will trigger a protection mechanism, such as cutting off the gas supply or power supply, to prevent dry burning accidents. The wire 1 is sleeved with the fiberglass self-extinguishing sleeve 2, which provides insulation protection for the wire 1 and has self-extinguishing characteristics, thereby improving safety and preventing fires caused by overheating. The fiberglass self-extinguishing sleeve 2 is sleeved on the outer side of the wire 1 and wraps the wire 1, which not only ensures the safe and stable transmission of electrical signals by the wire 1 in high-temperature environments, but also self-extinguishes in high-temperature conditions to prevent the spread of fire.

[0050] The thermosensitive element 8 is responsible for sensing the temperature changes at the bottom of the cookware and transmitting temperature signals to the control circuit of the gas stove through the wire 1. The motor 18 is electrically connected to the switch of the gas stove to realize linkage with the working state of the gas stove. When the gas stove is turned on, the motor 18 drives the reel 17 to rotate clockwise through the shaft 19. With the rotation of the reel 17, the rope body 16 is released and extends outward through the hollow pipe 14. At this time, the spring 13 provides elastic force to ensure that the button cover 7 can tightly adhere to the bottom of the cookware, thereby ensuring the accuracy of temperature sensing. The movable rod 15 moves freely in the hollow pipe 14 and is pulled by the rope body 16 to drive the mounting sleeve 4 and the button cover 7 to move towards the bottom of the cookware.

[0051] When the gas stove is turned off, the motor 18 drives the reel 17 to rotate counterclockwise through the shaft 19. The rotation of the reel 17 causes the rope body 16 to be wound and pulls the movable rod 15 inward through the rope body 16. The movement of the movable rod 15 drives the button cover 7 to retract into the first heat insulation sleeve 24. After the button cover 7 is retracted into the first heat insulation sleeve 24, it is no longer exposed to the external environment, thereby effectively avoiding physical damage caused by external impact or misoperation. For example, in a kitchen environment, the cookware or other objects may accidentally collide with the sensor, and the retracted button cover 7 can avoid such risks due to the protection of the first heat insulation sleeve 24.

[0052] The thermal element 8 is generally sensitive and delicate, and the retracted button cover 7 provides an additional protective layer for it, preventing it from being affected by dust, moisture or other environmental factors when not in use, thereby prolonging its service life. The button cover 7 is retracted in time when the gas stove is turned off, reducing the time it is completely exposed. This not only reduces the risk of burns caused by accidental contact, but also prevents the button cover 7 from aging or deforming due to long-term exposure to high-temperature environments. By reducing the exposure time of the button cover 7, material fatigue caused by long-term exposure to high temperatures, high humidity or corrosive environments can be reduced, thereby prolonging the service life of the entire sensor.

[0053] The rope body 16 enters and exits the through slot 21 in the protective cover 20. The inner wall of the through slot 21 is provided with a rolling groove 22, and a rolling ball 23 is installed in the rolling groove 22. When the rope body 16 moves, the rolling ball 23 rolls in the rolling groove 22, effectively reducing friction and reducing the possibility of the rope body 16 being stuck, ensuring the smoothness of the sensor action.

[0054] When maintenance or replacement of the button cover 7 is required, the button cover 7 only needs to be screwed. Through the interaction of the threaded groove 10 and the external thread 11, the button cover 7 can be quickly disassembled and replaced. This design not only simplifies the maintenance process, but also improves the maintainability of the sensor, thereby prolonging its service life.

[0055] By optimizing the connection method of the thermal element 8 and the wire 1, implementing the linkage design of the motor 18 and the gas stove, introducing the rolling ball 23 friction reduction mechanism, and simplifying the disassembly and replacement process of the button cover 7, the dry burning temperature sensor not only improves its reliability and safety in operation, but also enhances its maintainability and user experience. This design ensures that the sensor can work stably and efficiently in various use scenarios, providing a safer cooking environment for users.

[0056] Please refer to Figures 1-3 As shown, the third heat insulation sleeve 26 is in the shape of a circular truncated cone, with the small end of the truncated cone close to one end of the button cover 7, and the outer surface of the third heat insulation sleeve 26 is provided with a wavy pattern;

[0057] Further, the first heat insulation sleeve 24 is connected with the guide cylinder 3, the hollow tube 14 is connected with the first heat insulation sleeve 24, and the protective cover 20 is connected with the first heat insulation sleeve 24.

[0058] Through the above technical solutions:

[0059] In use, the first thermal insulation sleeve 24 is directly fitted outside the mounting sleeve 4, serving as the innermost thermal insulation layer, providing the first layer of thermal insulation protection, effectively reducing the heat transfer from the external environment to the mounting sleeve 4. Through this thermal insulation effect, the components inside the mounting sleeve 4 are protected from high temperatures, ensuring that the sensor can work normally in high-temperature environments.

[0060] To achieve high-efficiency thermal insulation, the first thermal insulation sleeve 24 is made of materials with low thermal conductivity, such as ceramic fiber and glass fiber. These materials can significantly reduce heat conduction, ensuring that internal components are not affected by high temperatures. At the same time, the selected materials need to have high-temperature resistance characteristics to ensure that there is no material aging or performance degradation in a continuous high-temperature environment. In addition, ceramic fiber and glass fiber materials have relatively low costs, suitable for mass production; and these materials are generally light, which will not significantly increase the overall weight of the sensor, thus not affecting the installation and use of the sensor.

[0061] The second thermal insulation sleeve 25 is fitted outside the first thermal insulation sleeve 24, serving as the intermediate thermal insulation layer. It further increases the number of thermal insulation layers, forming a multi-layer thermal insulation structure, effectively reducing heat conduction. Through this design, the second thermal insulation sleeve 25 can provide stronger thermal insulation capacity, further reducing heat transfer, ensuring that internal components are more fully protected.

[0062] To maintain stable thermal insulation performance in long-term high-temperature environments, the second thermal insulation sleeve 25 is made of materials with high thermal stability, such as high-temperature alloys and composite thermal insulation materials. These materials not only have excellent thermal insulation performance, but also effectively prevent material aging or performance degradation. Moreover, high-temperature alloys and composite thermal insulation materials generally have high mechanical strength, which can provide better structural support for the sensor, ensuring that it maintains stable performance under various use conditions. At the same time, these materials have excellent durability and can be used for a long time in harsh environments without failure.

[0063] The third thermal insulation sleeve 26 is fitted outside the second thermal insulation sleeve 25, serving as the outermost thermal insulation layer. The third thermal insulation sleeve 26 is in the shape of a circular truncated cone, with its small base end close to one end of the button cover 7. This design makes the end close to the fire source have a smaller contact area, thereby reducing heat transfer. The circular truncated cone-shaped third thermal insulation sleeve 26 not only increases the thickness of the thermal insulation layer, but also optimizes the heat distribution and transfer path through its unique shape design. This circular truncated cone design provides better mechanical strength and stability, ensuring that the thermal insulation sleeve does not deform due to thermal expansion in high-temperature environments. Since the small base end is close to the fire source, the contact area is reduced, thus effectively reducing heat transfer.

[0064] In addition, the wavy pattern increases the surface area of the third heat insulation sleeve 26, enhancing the contact area with air, thereby improving the convective heat dissipation efficiency. The wavy pattern can also effectively disperse thermal stress, reducing material fatigue and deformation caused by temperature changes, ensuring stable performance of the heat insulation sleeve during long-term use.

[0065] As the outermost layer, the third heat insulation sleeve 26 needs to directly face the external high-temperature environment, so it needs to choose materials that are resistant to high temperature and corrosion, such as stainless steel, titanium alloy, or ceramic materials, etc. Selecting materials with high thermal reflectivity can reflect part of the heat radiation, further reducing heat absorption and improving heat insulation effect. At the same time, the outer layer material needs to have high mechanical strength to provide structural support and protect the internal insulation layer.

[0066] In summary, by adopting a multi-layer heat insulation structure design and reasonably selecting the material and shape of each sleeve, the dry-burning temperature sensor can provide efficient heat protection in high-temperature environments, ensuring that the internal components are not affected by high temperatures. This design not only improves the safety of the sensor, but also prolongs its service life, ensuring that it can work stably in various harsh environments.

[0067] Although embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A temperature sensor designed to prevent dry burning, characterized in that, Include: The lead of dry burning temperature sensor (1), the outer side of lead (1) is equipped with glass fiber self-extinguishing sleeve (2), the outer side of glass fiber self-extinguishing sleeve (2) is equipped with guide cylinder (3), one end of guide cylinder (3) is equipped with installation sleeve (4), the outer wall of installation sleeve (4) is connected with installation block (5), the outer wall of installation block (5) is equipped with installation slot (6), the inside of installation slot (6) is installed with thermal element (8), thermal element (8) is connected with heat conduction block (9), the lateral wall of heat conduction block (9) is connected with button cover (7); The outer wall of one end of guide cylinder (3) inside installation sleeve (4) is equipped with fixed plate (12), spring (13) is connected between fixed plate (12) and installation sleeve (4), movable rod (15) is connected in installation sleeve (4), one end of the outer wall of movable rod (15) is equipped with hollow pipe (14), movable rod (15) is connected with rope body (16), one side of hollow pipe (14) is equipped with rope winding assembly.

2. A dry-burn prevention temperature sensor according to claim 1, wherein: The rope winding assembly includes reel (17) and motor (18), reel (17) is arranged on one side of hollow pipe (14), rope body (16) is wound on the outer wall of reel (17) through hollow pipe (14), motor (18) is located on one side of reel (17), shaft (19) is connected between reel (17) and motor (18), protective cover (20) is equipped on the outer side of reel (17) and motor (18), protective cover (20) is equipped with through slot (21), and rope body (16) passes through through slot (21), a plurality of rolling assemblies are arranged between rope body (16) and through slot (21).

3. A dry-burn prevention temperature sensor according to claim 2, wherein: The rolling assembly includes rolling groove (22) and ball (23), rolling groove (22) is opened in the inner wall of through slot (21), ball (23) is installed in rolling groove (22).

4. A dry-burn prevention temperature sensor according to claim 3, wherein: The outer side of installation sleeve (4) is equipped with first heat insulation sleeve (24), the outer side of first heat insulation sleeve (24) is equipped with second heat insulation sleeve (25), the outer side of second heat insulation sleeve (25) is equipped with third heat insulation sleeve (26).

5. A dry-burn prevention temperature sensor according to claim 4, wherein: The third heat insulation sleeve (26) is circular truncated cone, the small truncated cone end of third heat insulation sleeve (26) is close to one end of button cover (7), and the outer surface of third heat insulation sleeve (26) is provided with wavy lines.

6. A dry-burn prevention temperature sensor according to claim 5, wherein: The first heat insulation sleeve (24) is connected with guide cylinder (3), the hollow pipe (14) is connected with first heat insulation sleeve (24), the protective cover (20) is connected with first heat insulation sleeve (24).

7. A dry-burn prevention temperature sensor according to claim 1, wherein: The inner wall of installation slot (6) is equipped with thread groove (10), the outer wall of button cover (7) is equipped with external thread (11), thread groove (10) and external thread (11) are matched.

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