CN215573425U - Temperature sensor for preventing dry burning of stove and stove - Google Patents

Abstract

The utility model provides a temperature sensor for preventing dry burning of a stove, which comprises a temperature sensing component, a sliding component and a signal transmission component for an external circuit, wherein the temperature sensing component comprises a thermistor and a temperature sensing cap, the temperature sensing cap comprises a bottom surface, and an outer ring and an inner ring which are concentric and arranged on the bottom surface in the same direction, the outer diameter of the outer ring is smaller than the outer diameter of the bottom surface, the outer ring and the bottom surface are arranged in a step shape, a glass bead of the thermistor is arranged in the inner ring of the temperature sensing cap and is attached to the bottom surface of the temperature sensing cap, a lead of the thermistor is connected with a signal transmission component through an electric wire, and one end of the sliding component is connected with the temperature sensing cap and can drive the temperature sensing component to move along the axial direction of the sliding component. The utility model discloses a through small, the temperature sensing cap that coefficient of heat conductivity is high and the laminating carries out the temperature sensing at the cooking utensil on the temperature sensing cap hole thermistor of bottom to cooking utensils, the temperature conduction is fast, can accurate feedback temperature fast to can quick automatic cutout gas combustion when reaching the uniform temperature, realize cooking utensils and prevent dry combustion method purpose, improve the security that cooking utensils burnt.

Description

Temperature sensor for preventing dry burning of stove and stove

Technical Field

The utility model belongs to the technical field of temperature sensors, and particularly relates to a temperature sensor for preventing dry burning of a stove and the stove.

Background

The kitchen range is a kitchen electric product with the highest daily use frequency of our families, and because flammable and explosive dangerous gases are used, many unsafe injury events are caused by improper use or other accidents every year.

At present, due to the limitation of the flameout safety protection function, the existing flameout safety protection device still cannot prevent the occurrence of safety accidents, mainly because the situations of three-heart two-thoughts, forgetting and the like easily cause the dry pot to be burnt; when the oil at the bottom of the pan is heated to about 280 ℃, a chemical carcinogen called 'pyrene' can be generated, once the chemical carcinogen is inhaled, the immunity of cells can be damaged, cell gene mutation is caused, DNA (deoxyribonucleic acid) is damaged, cell tissue canceration is induced, safety events such as kitchen fire and the like are easily caused after the pan is dried for a long time, and the loss of life and property of consumers is caused.

Therefore, an anti-dry burning device is needed to be designed, so that the safety function and the effect of the cooker can be more comprehensively improved, the generation of harmful substances can be greatly reduced, and the health of a cooker can be improved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a temperature sensor for preventing dry burning of a stove, which can quickly sense and resist high temperature and realize the purpose of preventing dry burning of the stove at low cost.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a cooking utensils prevent dry combustion method and use temperature sensor, includes temperature sensing subassembly, slip subassembly and is used for the signal transmission subassembly of external circuit, the temperature sensing subassembly includes thermistor and temperature sensing cap, the temperature sensing cap includes the bottom surface and homodromous endocentric outer lane and the inner circle that sets up on the bottom surface, the outer lane external diameter is less than the bottom surface external diameter, and is the echelonment with the bottom surface and arranges, thermistor's glass pearl sets up in the inner circle of temperature sensing cap and the bottom surface of laminating temperature sensing cap, thermistor's lead wire and signal transmission subassembly connection of electric lines, slip subassembly one end is connected with the temperature sensing cap to can drive the temperature sensing subassembly along its axial displacement.

Furthermore, the bottom surface of the temperature sensing cap is a spherical surface, and a circle of groove is arranged in the middle of the outer ring of the temperature sensing cap.

Furthermore, a high-temperature-resistant insulating protective sleeve is sleeved outside the lead of the thermistor, one end of the protective sleeve is attached to the glass bead of the thermistor, and the other end of the protective sleeve is shorter than the lead of the thermistor by 3-5 mm.

Furthermore, high-temperature glue is filled between the thermistor and the inner ring of the temperature sensing cap.

Further, the slip subassembly includes guide bar, slide pipe, overcoat, elastic component and shell, guide bar, slide pipe and overcoat are for running through the through-hole structure, guide bar one end is passed through interference fit and the inner circle external connection of temperature sensing cap, and its tip and the bottom surface butt of temperature sensing cap and fixed, and the other end of guide bar stretches into in the slide pipe, the elastic component cup joint in the guide bar is outside, and the one end of elastic component is connected on the bottom surface between the inside and outside circle of temperature sensing cap, the other end of elastic component with slide pipe terminal surface butt, the outer lane external connection of interference fit and temperature sensing cap is passed through to overcoat one end, the other end of overcoat with slide pipe sliding connection, the shell cup joint in the overcoat outside, and keep 0.1 ~ 0.5 mm's clearance with the temperature sensing cap.

Furthermore, the slide tube comprises a first hollow tube and a second hollow tube, the diameter of the first hollow tube is larger than that of the second hollow tube, the first hollow tube and the second hollow tube are arranged in a step shape, a metal ring is riveted on the second hollow tube, a plurality of first guide sliding pieces capable of sliding relative to the outer sleeve are arranged on the outer side wall of the first hollow tube at equal intervals along the circumferential direction of the outer side wall, a supporting portion used for being connected with the outer sleeve in a limiting mode is arranged at the end portion of the first hollow tube, and the end portion of the elastic piece is abutted to the supporting portion.

Furthermore, the outer sleeve comprises a large-diameter section and a small-diameter section which are connected in a stepped mode, the end part of the large-diameter section is connected with the outer ring of the temperature sensing cap through interference fit, and a plurality of second guide sliding pieces capable of sliding relative to the sliding pipe are arranged on the side wall of the small-diameter section at equal intervals along the circumferential direction of the side wall.

Furthermore, the outer diameter of the large-diameter section gradually decreases from the temperature sensing cap end to the small-diameter section.

Further, the shell includes straight section of thick bamboo section and reducing section of thick bamboo section, the diameter of reducing section of thick bamboo section is diminished gradually to keeping away from straight section of thick bamboo section one end by straight section of thick bamboo section one end, straight section of thick bamboo section and reducing section of thick bamboo section all cup joint in the overcoat outside, the minor diameter port department of reducing section of thick bamboo section is equipped with the enstrophe portion of turning over to shell inside, enstrophe portion is connected with the parallel and interference fit of the lateral wall of overcoat.

In addition, the utility model also provides a stove which comprises a stove frame and the temperature sensor for preventing dry burning of the stove, wherein the temperature sensor for preventing dry burning of the stove is positioned in the center of the stove frame, and the bottom surface of the temperature sensing cap can be contacted with the bottom of a cooker placed on the stove frame.

Compared with the prior art, the utility model has the beneficial effects that:

(1) the temperature sensor for preventing dry burning of the kitchen range, provided by the utility model, can sense the temperature of the cooking utensils on the kitchen range through the temperature sensing cap with small volume and high heat conductivity coefficient and the thermistor attached to the bottom of the inner hole of the temperature sensing cap, the temperature conduction is fast, and the temperature can be fed back fast and accurately, so that the gas burning can be cut off fast and automatically when a certain temperature is reached, the purpose of preventing dry burning of the kitchen range is realized, and the burning safety of the kitchen range is improved.

(2) The temperature sensor for preventing dry burning of the kitchen range provided by the utility model realizes the close contact between the temperature sensing cap and the cooking utensils through the sliding action, ensures the accuracy of temperature measurement and can adapt to the cooking utensils in different shapes.

(3) The surface of the shell of the temperature sensor for preventing dry burning of the kitchen range provided by the utility model is subjected to certain surface treatment to improve antifouling capacity, the appearance is good, the variable diameter structure design ensures that the temperature sensing cap part does not gather heat, and the temperature measurement is accurate and is not distorted.

The present invention will be described in further detail below with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic structural diagram of a temperature sensor for preventing dry burning of a cooking range according to the present invention;

FIG. 2 is an exploded view of a temperature sensor for preventing dry burning of a range according to the present invention;

FIG. 3 is a schematic structural diagram of a temperature-sensing cap according to an embodiment of the present invention;

FIG. 4 is a schematic view of the construction of an outer cover in an embodiment of the present invention;

FIG. 5 is a schematic structural view of a slide bar in an embodiment of the present invention;

FIG. 6 is a schematic structural view of a housing in an embodiment of the utility model;

FIG. 7 is a schematic view of an assembled structure of the sliding assembly in the embodiment of the present invention;

FIG. 8 is a cross-sectional view of the mating connection of the outer sleeve and the slider bar in an embodiment of the present invention;

FIG. 9 is a schematic view of the working state of the temperature sensor for preventing dry burning of the cooking range.

Description of reference numerals: 1. a bottom surface; 2. an outer ring; 3. an inverted portion; 4. an inner ring; 5. a thermistor; 6. a protective sleeve; 7. a sliding assembly; 8. high-temperature glue; 9. a signal transmission component; 10. a glass fiber silica gel sleeve; 11. a guide bar; 12. an elastic member; 13. a slide pipe; 14. a jacket; 15. a housing; 16. copper strips; 17. a large diameter section; 18. a small diameter section; 19. a second guide slide; 20. a support portion; 21. a first hollow tube; 22. a first guide slide; 23. a second hollow tube; 24. a metal ring; 25. a straight cylinder section; 26. a reducing cylinder section.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of the present invention, "a plurality" means two or more unless otherwise specified.

As shown in fig. 1 and fig. 2, the present embodiment provides a temperature sensor for preventing dry-burning of a stove, which includes a temperature sensing assembly, a sliding assembly 7 and a signal transmission assembly 9 for an external circuit, where the temperature sensing assembly includes a thermistor 5 and a temperature sensing cap, the temperature sensing cap includes a bottom surface 1 and an outer ring 2 and an inner ring 4 which are concentric and arranged on the bottom surface 1 in the same direction, the outer diameter of the outer ring 2 is smaller than the outer diameter of the bottom surface 1, and is arranged in a step shape with the bottom surface 1, a glass bead of the thermistor 5 is arranged in the inner ring 4 of the temperature sensing cap and is attached to the bottom surface 1 of the temperature sensing cap, a lead of the thermistor 5 is connected with an electric wire of the signal transmission assembly 9, and one end of the sliding assembly 7 is connected with the temperature sensing cap and can drive the temperature sensing assembly to move along the axial direction thereof. In this embodiment, the bottom surface 1 of the temperature sensing cap is used for sensing temperature by contacting with a cooker, the inner ring 4 and the outer ring 2 of the temperature sensing cap are used for limiting and connecting the thermistor 5 and the sliding assembly 7, so that the temperature sensing cap can be in close contact with the bottom of the cooker under the action of the sliding assembly, the temperature sensing cap senses the temperature of the cooker and transmits the temperature to the thermistor 5, the thermistor 5 transmits the detected temperature signal to a circuit through the signal transmission assembly 9 for corresponding processing, and once the temperature of the bottom of the cooker is detected to exceed a preset temperature range, the circuit controls automatic cut-off of an air source to close combustion, so that the aim of preventing dry burning of the cooker is fulfilled, and the safety of burning of the cooker is improved.

As shown in fig. 2, the signal transmission assembly 9 includes a wire conductor, one end of which is crimped with the lead wire of the thermistor 5 by resistance welding or a common terminal, and the other end of which is connectable with an external line wire by a quick connector; the glass fiber silica gel sleeve 10 is sleeved outside the wire conductor and fixed through the copper strip 16, so that the safety of the line is ensured.

Preferably, as shown in fig. 3, the bottom surface 1 of the temperature sensing cap is designed to be a spherical surface, so that the temperature sensing part of the temperature sensing cap does not gather heat, and the temperature sensing precision is improved; specifically, the outer diameter of the bottom surface 1 of the temperature sensing cap is 8-12 mm, the thickness of the bottom surface 1 is 0.5-1.5 mm, the spherical radius of the bottom is 30-40 mm, the outer diameter of the outer ring 2 of the temperature sensing cap is smaller than the outer diameter of the bottom surface 1 by 1.5-2.5 mm, the thickness of the outer ring 2 is 0.8-1.0 mm, the height of the outer ring 2 is 2.5-3.5 mm, the thickness of the inner ring 4 of the temperature sensing cap is 0.7-1.5 mm, and the height of the inner ring 4 is 5-8 mm; furthermore, a circle of groove can be arranged in the middle of the outer ring 2 of the temperature sensing cap, and the depth of the groove is 0.2-0.3 mm.

Preferably, a high-temperature-resistant insulating protective sleeve 6 is sleeved outside the lead of the thermistor 5, one end of the protective sleeve 6 is attached to the glass bead of the thermistor 5, and the other end of the protective sleeve is shorter than the lead of the thermistor 5 by 3-5 mm. Further, high-temperature glue 8 is filled between the thermistor 5 and the inner ring 4 of the temperature sensing cap, and the high-temperature glue 8 has high heat conductivity coefficient and fast temperature conduction, so that the temperature sensed by the temperature sensing cap is efficiently transferred to the thermistor 5, and the real temperature of the cooker can be more accurately detected.

An embodiment of a detailed sliding assembly is shown in fig. 1, 7 and 8, in which the sliding assembly 7 includes a guide rod 11, a sliding tube 13, an outer sleeve 14, an elastic member 12 and a housing 15, the guide rod 11, the sliding tube 13 and the outer sleeve 14 are through hole structures, one end of the guide rod 11 is connected with the outside of the inner ring 4 of the temperature sensing cap through interference fit, and the end of the guide rod is abutted against and fixed to the bottom surface 1 of the temperature sensing cap, the other end of the guide rod 11 extends into the sliding tube 13, the elastic member 12 is sleeved outside the guide rod 11, one end of the elastic member 12 is connected to the bottom surface 1 between the inner ring and the outer ring of the temperature sensing cap, the other end of the elastic member 12 is abutted against the end surface of the sliding tube 13, specifically, in this embodiment, the elastic member 12 is a compression spring, one end of the outer sleeve 14 is connected with the outside of the outer ring 2 of the temperature sensing cap through interference fit, and a port of the outer sleeve 14 is abutted against a stepped surface formed by the bottom surface 1 and the outer ring 2 of the temperature sensing cap, the other end of the outer sleeve 14 is connected with the sliding pipe 13 in a sliding mode, and the shell 15 is sleeved on the outer side of the outer sleeve 14 and keeps a gap of 0.1-0.5 mm with the temperature sensing cap. As shown in fig. 9, when the bottom surface 1 of the temperature sensing cap contacts with the cooker, the temperature sensing cap compresses the elastic member 12 under the pressure of the cooker, and at the same time, since the temperature sensing cap is fixedly connected with the outer sleeve 14 of the sliding assembly 7, the end of the outer sleeve 14 connected with the sliding pipe 13 relatively moves on the sliding pipe 13; when the user moves or takes away the cooker to reduce or eliminate the pressure on the temperature sensing cap, the elastic member 12 will rebound and return, and the outer sleeve 14 will move relative to the sliding tube 13.

As an embodiment, as shown in fig. 5, the sliding tube 13 includes a first hollow tube 21 and a second hollow tube 23, the diameter of the first hollow tube 21 is greater than that of the second hollow tube 23, and the first hollow tube 21 and the second hollow tube 23 are arranged in a step shape, specifically, the diameter of the first hollow tube 21 is 7.3 ± 0.1mm, the diameter of the second hollow tube 23 is 5 ± 0.2mm, a metal ring 24 is riveted on the second hollow tube 23 and used for limiting and fixing when being connected with an external furnace frame, the diameter of the metal ring 24 is 5.8mm, the thickness of the metal ring is 1-2 mm, and the metal ring is arranged at a position 10mm away from the opening of the second hollow tube 23; a plurality of first guide sliding pieces 22 which can slide relative to the outer sleeve 14 are arranged on the outer side wall of the first hollow pipe 21 at equal intervals along the circumferential direction of the first hollow pipe; the end of the first hollow tube 21 is provided with a supporting portion 20 for limited connection with the outer sleeve 14, the supporting portion 20 is formed by extending the outer side wall of the first hollow tube 21 in a protruding manner along the radial direction, specifically, the outer diameter of the supporting portion 20 is 9.3mm, and the end of the elastic element 12 abuts against the supporting portion 20.

As an embodiment, as shown in fig. 4, the outer sleeve 14 includes a large diameter section 17 and a small diameter section 18 which are connected in a stepped manner, an end of the large diameter section 17 is connected with the outside of the outer ring 2 of the temperature sensing cap by interference fit, and a plurality of second guide sliders 19 which can slide relative to the slide pipe 13 are arranged on a side wall of the small diameter section 18 at equal intervals along the circumferential direction thereof; the outer diameter of the large-diameter section 17 gradually decreases from the temperature sensing cap end to the small-diameter section 18. Specifically, the diameter of the large-diameter section 17 close to one end of the temperature sensing cap is 10.5 +/-0.05 mm, and the diameter of the small-diameter section 18 close to the end is 10.4 +/-0.05 mm; the length of the small-diameter section 18 is 5-6 mm, the diameter is 7.8 +/-0.1 mm, and the outer diameter of the supporting part 20 of the sliding pipe 13 is larger than the diameter of the small-diameter section 18 of the outer sleeve 14 and smaller than the diameter of the large-diameter section 17, so that the supporting part 20 of the sliding pipe 13 can limit the connection between the sliding pipe 13 and the outer sleeve 14.

Specifically, as to the way of matching the first guide slide 22 of the slide tube 13 with the second guide slide 19 of the outer sleeve 14, in the present embodiment, as shown in fig. 7 and 8, the first guide slide 22 is a strip-shaped guide groove formed by the outer side wall of the first hollow tube 21 being recessed inward along the radial direction thereof, and the second guide slide 19 is a strip-shaped flange formed by the inner side wall of the small-diameter section 18 of the outer sleeve 14 being protruded and extended inward along the radial direction thereof, and the strip-shaped flange is in sliding connection with the strip-shaped guide groove. In other embodiments, the first guide slide 22 may also be a strip-shaped flange formed by extending the outer side wall of the first hollow tube 21 in a protruding manner along the radial direction, and the second guide slide 19 is a strip-shaped guide groove formed by recessing the inner side wall of the small-diameter section of the outer sleeve 14 along the radial direction, in which case the strip-shaped flange of the slide tube 13 is in a matching sliding connection with the strip-shaped guide groove of the outer sleeve 14. In the above embodiment, the concave-convex parts of the first guide slide 22 and the second guide slide 19 are matched with each other, so that the outer sleeve 14 and the slide tube 13 are locked in the circumferential direction, and the outer sleeve 14 and the slide tube 13 do not rotate relatively in the process of moving along the axial direction of the slide tube 13, thereby avoiding the situation that the temperature sensor is locked and cannot be reset in the resetting process.

As an embodiment, as shown in fig. 6, the housing 15 includes a straight cylinder section 25 and a reducing cylinder section 26, a diameter of the reducing cylinder section 26 gradually decreases from one end of the straight cylinder section 25 to one end away from the straight cylinder section 25, the straight cylinder section 25 and the reducing cylinder section 26 are both sleeved outside the outer sleeve 14, the reducing cylinder section 26 is disposed close to the temperature sensing cap, and the parabolic shape thereof ensures that the temperature sensing cap does not gather heat and the temperature measurement is accurate and undistorted. Preferably, the minor diameter port department of reducing section of thick bamboo section 26 is equipped with the enstrophe portion 3 of turning over to shell 15 inside, enstrophe portion 3 is connected with the parallel and interference fit of the lateral wall of overcoat 14, and is specific, and the length of enstrophe portion 3 is 2 ~ 5mm, and its internal diameter is 10.5 +/-0.05 mm. In addition, the surface of the shell 15 can be treated by a certain surface to improve antifouling capacity, and the shell 15 is used for protecting flame to directly burn the inside, so that air circulation can be prevented, and temperature measurement is accurate.

In addition, the embodiment also provides a stove, which comprises a stove frame and the temperature sensor for preventing dry burning of the stove, wherein the temperature sensor for preventing dry burning of the stove is positioned in the center of the stove frame, the bottom surface of the temperature sensing cap can be contacted with the bottom of a cooker placed on the stove frame, and the signal transmission assembly is externally connected with a circuit wire. The cooker is placed on the stove frame, the temperature sensing cap of the temperature sensing assembly can be in close contact with the cooker, and the range of application is wide. Once the temperature sensor detects that the temperature of the cooker exceeds a preset range, the signal is transmitted to a circuit and then is correspondingly processed, and then the gas source of the burner is cut off to close the burning; the temperature sensor for preventing dry burning of the cooker is in close contact with the bottom of the cooker, when water in the cooker is boiled to be dry, the temperature sensor for preventing dry burning of the cooker monitors that the temperature in the cooker is close to a set value of 290 degrees (which can be set randomly according to actual conditions), the gas supply of the cooker is cut off by the circuit control intelligent pulse, so that the effect of automatically extinguishing and stopping heating is achieved, when a user opens a fire and forgets to sit on the cooker, the temperature sensor for preventing dry burning of the cooker can automatically sense the temperature, and the gas source is automatically cut off to extinguish the fire within 1 minute, so that the protection effect of preventing dry burning is achieved.

The above examples are merely illustrative of the present invention and should not be construed as limiting the scope of the utility model, which is intended to be covered by the claims and any design similar or equivalent to the scope of the utility model.

Claims (10)

1. A temperature sensor for preventing dry burning of a kitchen range is characterized in that: including temperature sensing subassembly, slip subassembly and be used for the signal transmission subassembly of external circuit, the temperature sensing subassembly includes thermistor and temperature sensing cap, the temperature sensing cap includes the bottom surface and homodromous outer lane and the inner circle that sets up on the bottom surface, the outer lane external diameter is less than the bottom surface external diameter, and is the echelonment with the bottom surface and arranges, thermistor's glass pearl sets up in the inner circle of temperature sensing cap and the bottom surface of laminating temperature sensing cap, thermistor's lead wire and signal transmission subassembly connection of electric lines, slip subassembly one end is connected with the temperature sensing cap to can drive the temperature sensing subassembly along its axial displacement.

2. The temperature sensor for preventing dry burning of a cooking range as set forth in claim 1, wherein: the bottom surface of the temperature sensing cap is a spherical surface, and a circle of groove is arranged in the middle of the outer ring of the temperature sensing cap.

3. The temperature sensor for preventing dry burning of a cooking range as set forth in claim 1, wherein: the lead wire of the thermistor is sleeved with a high-temperature-resistant insulating protective sleeve, one end of the protective sleeve is attached to the glass bead of the thermistor, and the other end of the protective sleeve is shorter than the lead wire of the thermistor by 3-5 mm.

4. The temperature sensor for preventing dry burning of a cooking range as set forth in claim 1, wherein: and high-temperature glue is filled between the thermistor and the inner ring of the temperature sensing cap.

5. The temperature sensor for preventing dry burning of a cooking range as set forth in claim 1, wherein: the sliding assembly comprises a guide rod, a sliding pipe, an outer sleeve, an elastic piece and an outer shell, wherein the guide rod, the sliding pipe and the outer sleeve are of a through hole structure, one end of the guide rod is connected with the outer portion of an inner ring of the temperature sensing cap in an interference fit mode, the end portion of the guide rod is abutted to and fixed to the bottom surface of the temperature sensing cap, the other end of the guide rod extends into the sliding pipe, the elastic piece is sleeved on the outer portion of the guide rod, one end of the elastic piece is connected to the bottom surface between the inner ring and the outer ring of the temperature sensing cap, the other end of the elastic piece is abutted to the end face of the sliding pipe, one end of the outer sleeve is connected with the outer ring of the temperature sensing cap in an interference fit mode, the other end of the outer sleeve is connected with the sliding pipe in a sliding mode, and the outer shell is sleeved on the outer side of the outer sleeve and keeps a gap of 0.1-0.5 mm with the temperature sensing cap.

6. The temperature sensor for preventing dry burning of the cooking range as set forth in claim 5, wherein: the sliding pipe comprises a first hollow pipe and a second hollow pipe, the diameter of the first hollow pipe is larger than that of the second hollow pipe, the first hollow pipe and the second hollow pipe are arranged in a step shape, a metal ring is riveted on the second hollow pipe, a plurality of first guide sliding pieces capable of sliding relative to the outer sleeve are arranged on the outer side wall of the first hollow pipe at equal intervals along the circumferential direction of the outer side wall, a supporting portion used for being connected with the outer sleeve in a limiting mode is arranged at the end portion of the first hollow pipe, and the end portion of the elastic piece is abutted to the supporting portion.

7. The temperature sensor for preventing dry burning of the cooking range as set forth in claim 5, wherein: the outer sleeve comprises a large-diameter section and a small-diameter section which are connected in a stepped mode, the end portion of the large-diameter section is connected with the outer ring of the temperature sensing cap through interference fit, and a plurality of second guide sliding pieces capable of sliding relative to the sliding pipe are arranged on the side wall of the small-diameter section at equal intervals along the circumferential direction of the side wall.

8. The temperature sensor for preventing dry-burning of a cooking range of claim 7, wherein: the outer diameter of the large-diameter section is gradually decreased from the temperature sensing cap end to the small-diameter section.

9. The temperature sensor for preventing dry burning of the cooking range as set forth in claim 5, wherein: the shell includes straight section of thick bamboo section and reducing section of thick bamboo section, the diameter of reducing section of thick bamboo section is diminished gradually to keeping away from straight section of thick bamboo section one end by straight section of thick bamboo section one end, straight section of thick bamboo section and reducing section of thick bamboo section all cup joint in the overcoat outside, the minor diameter port department of reducing section of thick bamboo section is equipped with the enstrophe portion of turning over to shell inside, enstrophe portion is connected with the parallel and interference fit of the lateral wall of overcoat.

10. A cooking utensil, its characterized in that: the temperature sensor for preventing the dry burning of the kitchen range comprises a stove frame and the temperature sensor for preventing the dry burning of the kitchen range as claimed in any one of claims 1 to 9, wherein the temperature sensor for preventing the dry burning of the kitchen range is positioned in the center of the stove frame, and the bottom surface of the temperature sensing cap can be contacted with the bottom of a cooker placed on the stove frame.

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