Multipurpose anti-dry-burning temperature sensor and gas stove

Abstract

The invention relates to the technical field of temperature sensing, and provides a multipurpose anti-dry-burning temperature sensor, which comprises a shell with an inner cavity, and is characterized in that the surface of the shell is recessed inwards to form a temperature sensing groove, and a temperature sensing assembly and a first driving assembly for driving the temperature sensing assembly to extend out of or retract into the temperature sensing groove are arranged in the temperature sensing groove; before the first driving assembly drives the temperature sensing assembly, the temperature sensing surface of the temperature sensing assembly is located outside the temperature sensing groove. The invention further provides a gas stove which comprises the multi-purpose anti-dry-burning temperature sensor. The temperature sensing surface of the temperature sensing assembly is located outside the temperature sensing groove and can make contact with the pot bottom at the first time, after the pot bottom is pressed downwards, the first driving assembly can drive the temperature sensing assembly to retract into the temperature sensing groove, and in the process, the temperature sensing surface is attached to the pot bottom all the time till the temperature sensing assembly retracts into the temperature sensing groove in a self-adaptive mode; therefore, the actual temperature of the pot bottom is effectively detected, and signal misjudgment is reduced.

Description

Technical Field

[0001] The present invention relates to the field of temperature sensing technology, and in particular to a multi-purpose anti-dry-burning temperature sensor and a gas stove. Background Art

[0002] As a core appliance in the kitchen, the safety of the gas stove is particularly important. During the use of traditional gas stoves, due to problems such as dry burning, they may cause serious consequences such as burning food, damaging pots, and even causing fires. Therefore, it is crucial to choose a gas stove with an anti-dry burning function;

[0003] The anti-dry-boil temperature sensor provides protection against dry-boil or overheating. When it detects a dry-boil or overheated pot, it automatically cuts off the gas supply, preventing fire risks. This is a practical and effective safety measure for situations where the stove is forgotten or unattended. However, the current anti-dry-boil temperature sensor's sensing surface is flush with the pot housing, making the anti-dry-boil feature unsuitable for all types of pots. For example, with pots with inward-concave bottoms, such as casseroles and enamel pots, the sensing surface cannot fully contact the pot, causing the anti-dry-boil feature to be falsely triggered, causing inconvenience to the user's normal gas stove operation. Summary of the Invention

[0004] The object of the present invention is to provide a multi-purpose anti-dry-burning temperature sensor and a gas stove, which can at least solve some of the defects in the prior art.

[0005] To achieve the above-mentioned objectives, an embodiment of the present invention provides the following technical solution: a multi-purpose anti-dry burning temperature sensor, comprising a shell with an inner cavity, characterized in that: the shell is recessed inward on the surface to form a temperature sensing groove, a temperature sensing component and a first driving component for driving the temperature sensing component to extend or retract into the temperature sensing groove are provided in the temperature sensing groove, and before the first driving component drives the temperature sensing component, the temperature sensing surface of the temperature sensing component is located outside the temperature sensing groove.

[0006] Furthermore, the first driving component includes a first spring for providing driving force, and the direction of the elastic force of the first spring is consistent with the displacement direction of the temperature sensing component.

[0007] Furthermore, the first driving assembly also includes a first sleeve for the first spring to be sleeved, and one end of the first sleeve away from the bottom of the temperature sensing tank is fixedly connected to the temperature sensing assembly, and the bottom of the temperature sensing tank has an opening for the first sleeve to slide out of the temperature sensing tank.

[0008] Furthermore, the first sleeve has a cavity therein for the connecting wire to pass through.

[0009] Furthermore, the temperature sensing component includes a temperature sensing cap and a thermistor for receiving the temperature transmitted by the temperature sensing cap. The thermistor is encapsulated in the temperature sensing cap, and the side wall of the temperature sensing cap slides in contact with the inner wall of the temperature sensing tank.

[0010] Furthermore, the temperature sensing surface of the temperature sensing cap has an expanded structure, and the expanded structure is used to close the gap between the side wall of the temperature sensing cap and the inner wall of the temperature sensing cap.

[0011] Furthermore, the temperature sensing cap is filled with thermal conductive glue, and the thermal conductive glue wraps the thermistor.

[0012] Furthermore, it also includes a sliding tube for the shell to be slidably mounted and a second driving component for driving the shell to slide on the sliding tube.

[0013] Furthermore, the second driving assembly includes a second spring disposed in the inner cavity of the housing, one end of the second spring is fixed to the housing, and the other end is fixed to the sliding tube.

[0014] An embodiment of the present invention provides another technical solution: a gas stove comprising the above-mentioned multi-purpose anti-dry-burning temperature sensor.

[0015] Compared with the prior art, the beneficial effect of the present invention is: since the temperature sensing surface of the temperature sensing component is located outside the temperature sensing groove, it can contact the bottom of the pot at the first time. When the bottom of the pot is pressed down, the first driving component can drive the temperature sensing component to retract into the temperature sensing groove. During this process, the temperature sensing surface always adheres to the bottom of the pot until the temperature sensing component adaptively retracts into the temperature sensing groove, thereby effectively detecting the actual temperature of the bottom of the pot and reducing signal misjudgment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of a multi-purpose anti-dry-burning temperature sensor provided by an embodiment of the present invention;

[0017] Figure 2 for Figure 1 Schematic diagram of a local vertical section;

[0018] Figure 3 A schematic diagram of the fitting of a temperature sensing cap and a pot bottom of a multi-purpose anti-dry-boiling temperature sensor provided by an embodiment of the present invention;

[0019] In the accompanying drawings, 1 is a shell; 10 is an inner cavity; 11 is a temperature sensing tank; 2 is a temperature sensing component; 20 is a temperature sensing cap; 21 is a temperature sensing surface; 22 is a thermistor; 23 is a thermal conductive adhesive; 30 is a first spring; 31 is a first sleeve; 310 is an opening; 311 is a cavity; 40 is a slide tube; 41 is a second spring; 42 is a limiter; 43 is a second sleeve; 50 is a connecting wire; 51 is a connector. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] See also Figure 1 、 Figure 2 and Figure 3 An embodiment of the present invention provides a multi-purpose anti-dry-boiling temperature sensor, comprising a housing 1 having an inner cavity 10. The housing 1 is recessed inwardly on its surface to form a temperature-sensing groove 11. A temperature-sensing component 2 and a first driving component for driving the temperature-sensing component 2 to extend or retract into the temperature-sensing groove 11 are disposed within the temperature-sensing groove 11. Before the first driving component drives the temperature-sensing component 2, the temperature-sensing surface 21 of the temperature-sensing component 2 is located outside the temperature-sensing groove 11. In this embodiment, since the temperature-sensing surface 21 of the temperature-sensing component 2 is located outside the temperature-sensing groove 11, it can contact the bottom of the pot immediately. When the bottom of the pot is pressed downward, the first driving component can drive the temperature-sensing component 2 to retract into the temperature-sensing groove 11. During this process, the temperature-sensing surface 21 always adheres to the bottom of the pot until the temperature-sensing component 2 adaptively retracts into the temperature-sensing groove 11, thereby effectively detecting the actual temperature of the pot bottom and reducing signal misjudgment. Specifically, most existing sensors of this type have a temperature-sensing portion flush with the housing. When the pot is placed, the temperature-sensing portion moves with the housing. When the pot bottom is uneven or concave, the temperature-sensing portion may not be able to release the housing, resulting in a misjudgment. Based on this, the present embodiment cleverly designs the temperature-sensing component 2 to move relative to the housing 1, and in the initial state, the temperature-sensing surface 21 of the temperature-sensing component 2 extends outside the temperature-sensing groove 11. In this way, when the pot is placed, the temperature-sensing surface 21 will first contact the pot bottom, regardless of whether the pot bottom is uneven or concave. The temperature-sensing component 2 will then adaptively change position as the pot is placed, until the housing 1 lifts the pot bottom, achieving stable support. In addition, the present embodiment uses a first drive component to achieve a large range of movement of the temperature-sensing component 2, which is more capable of solving technical problems than using flexible materials such as rubber to achieve minute changes. Preferably, the temperature sensing groove 11 can be a structure formed by a depression of the shell 1, that is, the shell 1 is integrally formed with the temperature sensing groove 11, or a separate temperature sensing groove 11 can be riveted onto the shell 1. Both methods are acceptable and are not limited in this embodiment.

[0022] See also Figure 1 、 Figure 2 and Figure 3The first drive assembly includes a first spring 30 for providing a driving force. The direction of the elastic force of the first spring 30 is consistent with the displacement direction of the temperature sensing assembly 2. In this embodiment, the first drive assembly described above is refined, and the driving method adopts the first spring 30. The first spring 30 can provide an elastic force. In the initial state, the temperature sensing cap 20 partially extends outside the temperature sensing groove 11. When the temperature sensing assembly 2 is pressed by the bottom of the pot, it will retract into the temperature sensing groove 11 under the action of the first spring 30. At this time, the first spring 30 is compressed. When the pot is lifted, the first spring 30 will reset, thereby driving the temperature sensing assembly 2 back to its initial state.

[0023] To further refine the first drive component mentioned above, please refer to Figure 1 、 Figure 2 and Figure 3 The first driving assembly also includes a first sleeve 31 for the first spring 30 to be sleeved. The end of the first sleeve 31 away from the bottom of the temperature sensing tank 11 is fixedly connected to the temperature sensing component 2. The bottom of the temperature sensing tank 11 has an opening 310 for the first sleeve 31 to slide out of the temperature sensing tank 11. The first sleeve 31 can be used to sleeve the first spring 30 on the one hand, and to provide guidance on the other hand, and it also facilitates the connection of the temperature sensing component 2. Although it is feasible to use only the first spring 30 in the above embodiment, the use of this first sleeve 31 in conjunction with the first spring 30 can have more functions. For example, a cavity 311 can be made into the first sleeve 31, so that the connecting wire 50 can pass through and the flexible connecting wire 50 can be prevented from bending. The opening 310 is provided at the bottom of the groove to facilitate the first sleeve 31 to slide out of the temperature sensing tank 11 and avoid interference.

[0024] For details on the above temperature sensing component 2, please refer to Figure 1 、 Figure 2 and Figure 3 The temperature sensing assembly 2 includes a temperature sensing cap 20 and a thermistor 22 for receiving the temperature transmitted by the temperature sensing cap 20. The thermistor 22 is encapsulated within the temperature sensing cap 20, and the sidewalls of the temperature sensing cap 20 slide in contact with the inner wall of the temperature sensing tank 11. The temperature sensing tank 11 is preferably formed inwardly in the central portion of the housing 1, with the inner wall of the temperature sensing tank 11 and the sidewalls of the temperature sensing cap 20 being smooth to prevent friction from affecting relative sliding between the two. The temperature sensing cap 20 compresses the first spring 30 and is riveted to the temperature sensing tank 11.

[0025] The above-mentioned temperature-sensing cap 20 is detailed. The temperature-sensing surface 21 of the temperature-sensing cap 20 has an expanded structure, and the expanded structure is used to close the gap between the side wall of the temperature-sensing cap 20 and the inner wall of the temperature-sensing cap 20. In this embodiment, since the temperature-sensing cap 20 and the temperature-sensing tank 11 slide relative to each other, there will be a gap between them, or the material will deform after the product has been used for a long time, and a gap will appear. The ash or other debris at the bottom of the pot may enter the gap and affect the relative sliding between the temperature-sensing cap 20 and the temperature-sensing tank 11. Therefore, an expanded structure is designed at the end face of the temperature-sensing cap 20. The expanded structure adopts, for example, a mushroom head, or other structures with a size slightly larger than the size of the temperature-sensing cap 20. When the temperature-sensing cap 20 is retracted into the temperature-sensing tank 11, the expanded structure can close the notch of the temperature-sensing tank 11, thereby eliminating the above-mentioned gap.

[0026] To further refine the above-mentioned temperature sensing cap 20, please refer to Figure 1 、 Figure 2 and Figure 3 , the temperature sensing cap 20 is filled with thermal conductive glue 23, and the thermal conductive glue 23 wraps the thermistor 22. The thermal conductive glue 23 can be filled in the temperature sensing cap 20, and the heat sensed by the temperature sensing surface 21 of the temperature sensing cap 20 can be transferred to the thermistor 22 through the thermal conductive glue 23, ensuring that the thermistor 22 can continuously obtain heat. The thermistor 22 is electrically connected to the connecting wire 50, and can transmit the signal to the connector 51 at the other end of the connecting wire 50, and transmit the collected signal to the control circuit board. After the control circuit board processes the signal, it forms the next action feedback. Preferably, the thermal conductive glue 23 is a high-temperature glue that can withstand high temperatures above 400°C and can ensure long-term insulation protection under high temperature resistance.

[0027] See also Figure 1 、 Figure 2 and Figure 3 , the sensor also includes a slide tube 40 for the shell 1 to slide on, and a second drive component for driving the shell 1 to slide on the slide tube 40. The design of this second drive component allows this product to be adapted to ordinary cookware. That is, after the pot is placed, the shell 1 will be pressed by the bottom of the pot and slide along the slide tube 40. In this way, it can adapt to ordinary curved pot bottoms, making this product adaptable to more types of cookware. Preferably, the second drive component includes a second spring 41 placed in the inner cavity 10 of the shell 1, one end of the second spring 41 is fixed to the shell 1, and the other end is fixed to the slide tube 40. The driving method can also be a spring. Of course, in addition to the spring, other passive linear drive mechanisms, such as electric push rods, can also achieve the purpose, including the above-mentioned first spring 30, which can also adopt other existing linear drive mechanisms.

[0028] To further optimize the above solution, please refer to Figure 1 、 Figure 2 and Figure 3 A stopper 42 is provided inside the housing 1 near one end of the slide tube 40 to limit the travel of the second spring 41. Preferably, the slide tube 40 also has a cavity 311 for the connecting wire 50 to pass through. Furthermore, the sensor includes a second sleeve 43 for the second spring 41 to fit within. The first sleeve 31 can slide into the cavity 311 of the second sleeve 43. The second sleeve 43 extends from the first sleeve 31 to the exterior of the housing.

[0029] An embodiment of the present invention provides a gas stove that adopts the above-mentioned multi-purpose dry-burning temperature sensor. Since the temperature-sensing surface of the temperature-sensing component is located outside the temperature-sensing groove, it can contact the bottom of the pot at the first time. When the bottom of the pot is pressed down, the first driving component can drive the temperature-sensing component to retract into the temperature-sensing groove. During this process, the temperature-sensing surface always adheres to the bottom of the pot until the temperature-sensing component adaptively retracts into the temperature-sensing groove, thereby effectively detecting the actual temperature of the bottom of the pot, reducing signal misjudgment, and avoiding dry-burning.

[0030] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A multi-purpose anti-dry-burn temperature sensor, comprising a housing having an inner cavity, characterized in that: The shell is recessed inward on its surface to form a temperature sensing groove. A temperature sensing component and a first driving component for driving the temperature sensing component to extend or retract into the temperature sensing groove are provided in the temperature sensing groove. Before the first driving component drives the temperature sensing component, the temperature sensing surface of the temperature sensing component is located outside the temperature sensing groove.

2. The multi-purpose anti-dry-burning temperature sensor according to claim 1, characterized in that: The first driving component includes a first spring for providing driving force, and the direction of the elastic force of the first spring is consistent with the displacement direction of the temperature sensing component.

3. The multi-purpose anti-dry-burning temperature sensor according to claim 2, wherein: The first driving assembly also includes a first sleeve for the first spring to be sleeved, and one end of the first sleeve away from the bottom of the temperature sensing tank is fixedly connected to the temperature sensing assembly, and the bottom of the temperature sensing tank has an opening for the first sleeve to slide out of the temperature sensing tank.

4. The multi-purpose anti-dry-burning temperature sensor according to claim 3, wherein: The first sleeve has a cavity therein for the connecting wire to pass through.

5. The multi-purpose anti-dry-burning temperature sensor according to claim 1, wherein: The temperature sensing component includes a temperature sensing cap and a thermistor for receiving the temperature transmitted by the temperature sensing cap. The thermistor is encapsulated in the temperature sensing cap, and the side wall of the temperature sensing cap slides in contact with the inner wall of the temperature sensing tank.

6. The multi-purpose anti-dry-burning temperature sensor according to claim 5, characterized in that: The temperature sensing surface of the temperature sensing cap has an expanded structure, and the expanded structure is used to close the gap between the side wall of the temperature sensing cap and the inner wall of the temperature sensing cap.

7. The multi-purpose anti-dry-burning temperature sensor according to claim 5, wherein: The temperature sensing cap is filled with thermal conductive glue, and the thermal conductive glue wraps the thermistor.

8. The multi-purpose anti-dry-burning temperature sensor according to claim 1, wherein: The utility model also comprises a sliding tube for slidingly sleeved on the shell and a second driving component for driving the shell to slide on the sliding tube.

9. The multi-purpose anti-dry-burning temperature sensor according to claim 8, wherein: The second driving assembly includes a second spring disposed in the inner cavity of the housing. One end of the second spring is fixed to the housing, and the other end is fixed to the slide tube.

10. A gas stove, characterized in that: It comprises the multi-purpose anti-dry-burning temperature sensor as described in any one of claims 1-9.

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