Overheat protection structure and heating device

Abstract

The utility model provides an overheating protection structure and a heating device, wherein the overheating protection structure is applied to a heating plate, and includes: an insulating heat-conducting sheet, which is attached to the bottom of the heating plate; a heat-insulating member, which is attached to the bottom of the insulating heat-conducting sheet, and a mounting through hole is provided in the middle of the heat-insulating member; a mounting bracket, which is used to support the insulating heat-conducting sheet; and a heat-conducting unit, which includes a thermocouple sensor, and the thermocouple sensor is provided with a top contact portion, which passes through the mounting through hole and contacts the insulating heat-conducting sheet. The heat of the heating plate is isolated by arranging the heat-insulating member, and the top contact portion of the thermocouple sensor is passed through the mounting through hole and contacts the insulating heat-conducting sheet. When the heating film of the heating device is locally high temperature or dry-burned, the insulating heat-conducting sheet can quickly conduct heat, so that the thermocouple sensor can accurately detect the real-time temperature of the resistance film of the microcrystalline heating plate, can quickly sense the temperature of the heating device, and can immediately cut off the power supply through the circuit breaker to prevent the temperature from rising sharply, protect the product, and avoid irreversible damage.

Description

Technical Field

[0001] The utility model relates to the technical field of heating protection, in particular to an overheating protection structure and a heating device. Background Art

[0002] As people pay more attention to health, the combination of ordinary stainless steel plates and heating tubes for boiling water can no longer meet people's needs in life. Heating with safer and healthier microcrystalline glass plates becomes safe and healthy, and this safe and healthy heating structure will have good application prospects in areas such as life applications.

[0003] The heating method of microcrystalline glass plate heating is often very fast due to the small unit heating area and high density. Because the heating speed is very fast: the temperature of the heating plate surface can rise from room temperature to over 400°C within 1 minute. At present, traditional NTC sensors are usually set at the heated device, and can only detect the temperature of the food or liquid in the device. If there is no food or water in the heating device, the NTC sensor cannot effectively detect the real-time temperature of the microcrystalline plate heating plate resistance film to control the heating power of the microcrystalline plate heating plate. When the heating power is too large, the resistance film will be burned out in 1 and a half minutes, causing the entire heating device to be unable to work normally. Utility Model Content

[0004] Based on this, in order to solve the problem that the above-mentioned heating device cannot effectively detect the real-time temperature of the resistance film of the microcrystalline plate heating plate, when the heating power is too large, there is a risk of burning the resistance film in a short time, causing the entire heating device to be unable to be used normally, the utility model provides an overheating protection structure and a heating device, and its specific technical solution is as follows:

[0005] On the one hand, an overheat protection structure is applied to a heating plate, comprising:

[0006] The insulating heat conductive sheet is attached under the heating plate;

[0007] A heat insulating member is attached below the insulating heat conductive sheet, and a mounting through hole is provided in the middle of the heat insulating member;

[0008] A mounting bracket, used for supporting the insulating heat conductive sheet;

[0009] The heat conduction unit comprises a thermocouple sensor, wherein the thermocouple sensor is provided with a top contact portion, and the top contact portion passes through the mounting through hole and contacts the insulating and heat conducting sheet.

[0010] The above-mentioned overheating protection structure isolates the heat of the heating plate by arranging a thermal insulation member, and utilizes the top contact portion of the thermocouple sensor to pass through the installation through hole and contact the insulating thermal conductive sheet. When the heating film of the heating device is locally high temperature or dry-burned, the insulating thermal conductive sheet can quickly conduct heat, so that the thermocouple sensor can accurately detect the real-time temperature of the resistance film of the microcrystalline heating plate, can quickly sense the temperature of the heating device, and can immediately cut off the power supply through the circuit breaker to prevent the temperature from rising sharply, protect the product, and avoid causing irreversible physical damage; the thermal insulation member prevents the heat radiated from the heating plate from affecting the detection accuracy of the thermocouple sensor, thereby ensuring the detection accuracy of the thermocouple sensor; in addition, this structure can be reused within the normal range of the heating device, and the production cost is low.

[0011] Furthermore, the insulating heat-conducting sheet is a mica plate with a temperature resistance of more than 500° C. and a thickness of 0.1 mm to 0.5 mm.

[0012] Furthermore, the mounting bracket is a shell member with an empty cavity at the center; and the heat insulating member is arranged in the empty cavity.

[0013] Furthermore, the thermal insulation component is thermal insulation cotton, and a gap of 1 mm to 2 mm is provided between the bottom surface of the thermal insulation cotton and the bottom surface of the empty cavity.

[0014] Furthermore, it also includes a supporting unit; the supporting unit includes a connecting plate and an elastic member connected to the bottom of the mounting bracket; the thermocouple sensor is also provided with a pressing portion; one end of the elastic member presses the pressing portion, and the other end presses the connecting plate.

[0015] Furthermore, a mounting column is provided at the bottom of the mounting bracket; the supporting unit also includes a locking screw, and the locking screw passes through the connecting plate and is fixedly connected to the mounting column.

[0016] Furthermore, the elastic member is a spring member, and the pressing portion includes a positioning end smaller than the inner diameter of the spring member and a round shoulder protruding from the positioning end; one end of the spring member is sleeved on the positioning end and presses the round shoulder.

[0017] Furthermore, it also includes an NTC sensor arranged around the thermocouple sensor, the mounting bracket, the insulating heat conductive sheet and the heating plate are all provided with mounting holes adapted to the NTC sensor; the NTC sensor is provided with a detection probe passing through the mounting hole.

[0018] On the other hand, a heating device includes a heating plate and an overheating protection structure; the heating plate is a circular microcrystalline glass plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention can be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily drawn to scale, but the emphasis is placed on illustrating the principles of the embodiments. In different views, the same reference numerals designate corresponding parts.

[0020] Figure 1 It is a structural schematic diagram of an overheat protection structure described in an embodiment of the utility model.

[0021] Description of reference numerals:

[0022] 1. Insulating thermal conductive sheet; 2. Thermal insulation; 3. Mounting bracket; 4. Thermal conductive unit; 5. Support unit; 6. NTC sensor;

[0023] 7. Heating plate; 8. Overheat protection structure;

[0024] 31. Vacant cavity; 32. Mounting column;

[0025] 41. Thermocouple sensor; 42. Top contact portion; 43. Top pressure portion;

[0026] 51. Connecting plate; 52. Elastic member; 53. Locking screw. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with its embodiments. It should be understood that the specific implementation methods described here are only used to explain the utility model and do not limit the protection scope of the utility model.

[0028] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0030] The “first” and “second” mentioned in the present invention do not represent specific quantities and orders, but are merely used to distinguish names.

[0031] On the one hand, if Figure 1 As shown, an overheat protection structure in one embodiment of the utility model is applied to a heating plate, comprising:

[0032] The insulating heat-conducting sheet 1 is attached below the heating plate;

[0033] A heat insulating member 2 is attached below the insulating heat conductive sheet 1, and a mounting through hole is provided in the middle of the heat insulating member 2;

[0034] A mounting bracket 3, used for supporting the insulating heat conductive sheet 1;

[0035] The heat conduction unit 4 comprises a thermocouple sensor 41 . The thermocouple sensor 41 is provided with a top contact portion 42 . The top contact portion 42 passes through the mounting through hole and contacts the insulating heat conduction sheet 1 .

[0036] The above-mentioned overheating protection structure isolates the heat of the heating plate by arranging the thermal insulation member 2, and utilizes the top contact portion 42 of the thermocouple sensor 41 to pass through the installation through hole and contact the insulating thermal conductive sheet 1. When the heating film of the heating device is locally high temperature or dry-burned, the insulating thermal conductive sheet 1 can quickly conduct heat, so that the thermocouple sensor 41 can accurately detect the real-time temperature of the resistance film of the microcrystalline heating plate, can quickly sense the temperature of the heating device, and can immediately cut off the power supply through the circuit breaker to prevent the temperature from rising sharply, protect the product, and avoid causing irreversible physical damage; the thermal insulation member 2 prevents the heat radiated from the heating plate from affecting the detection accuracy of the thermocouple sensor 41, thereby ensuring the detection accuracy of the thermocouple sensor 41; in addition, this structure can be reused within the normal range of the heating device, and the production cost is low.

[0037] In one embodiment, the insulating heat conductive sheet 1 is a mica board with a temperature resistance of 500°C or above and a thickness of 0.1mm to 0.5mm. In this way, the mica board can withstand a temperature of 500°C to 850°C under continuous use and a temperature of 850°C to 1050°C under intermittent use, and can still maintain its uniform and good thermal conductivity when used under high temperature conditions.

[0038] In one embodiment, the mounting bracket 3 is a shell member with an empty cavity 31 at the center; the heat insulating member 2 is arranged in the empty cavity 31. In this way, by providing the empty cavity 31 to accommodate the heat insulating member 2, the overall assembly performance of the overheat protection structure is improved.

[0039] In one embodiment, the heat insulating member 2 is heat insulating cotton, and a gap of 1 mm to 2 mm is provided between the bottom surface of the heat insulating cotton and the bottom surface of the empty cavity 31. Thus, the gap of 1 mm to 2 mm is used as a safety distance to prevent local heat accumulation from affecting the detection effect of the thermocouple sensor 41.

[0040] In one embodiment, a support unit 5 is further included; the support unit 5 includes a connecting plate 51 and an elastic member 52 connected to the bottom of the mounting bracket 3; the thermocouple sensor 41 is also provided with a pressing portion 43; one end of the elastic member 52 presses the pressing portion 43, and the other end presses the connecting plate 51. In this way, the elastic member 52 presses the pressing portion 43 of the thermocouple sensor 41, so that the contact portion 42 is in close contact with the insulating thermal conductive sheet 1, thereby ensuring the detection accuracy of the thermocouple sensor 41.

[0041] In one embodiment, the elastic member 52 can be a spring, silicone, a plastic member with elastic ribs, etc.

[0042] In one embodiment, a mounting column 32 is provided at the bottom of the mounting bracket 3; the support unit 5 further includes a locking screw 53, which passes through the connecting plate 51 and is fixedly connected to the mounting column 32. In this way, the connecting plate 51 presses the elastic member 52 by passing the locking screw 53 through the connecting plate 51 and being fixedly connected to the mounting column 32.

[0043] In one embodiment, the elastic member 52 is a spring member, and the pressing portion 43 includes a positioning end smaller than the inner diameter of the spring member and a round shoulder protruding from the positioning end; one end of the spring member is sleeved on the positioning end and presses the round shoulder.

[0044] In one embodiment, an NTC sensor 6 is further included which is arranged around the thermocouple sensor 41. The mounting bracket 3, the insulating heat conductive sheet 1 and the heating plate are all provided with mounting holes adapted to the NTC sensor 6; the NTC sensor 6 is provided with a detection probe passing through the mounting hole. Specifically, the NTC sensor 6 can be installed at any position of the heating plate, and can be triggered at a single point or multiple points. In this way, the real-time temperature of the bottom and surface of the heating plate is dually detected by the thermocouple sensor 41 and the NTC sensor 6, thereby ensuring the safety of the heating device.

[0045] On the one hand, a heating device in an embodiment of the utility model comprises a heating plate 7 and an overheat protection structure 8; the heating plate 7 is a circular plate. Specifically, the heat insulating member 2 is a circular plate, and the mounting through hole is arranged at the center of the circular plate.

[0046] In one embodiment, the heating device is a health pot or a kettle, and the NTC sensor 6 is arranged at the bottom of the water-boiling space of the kettle body. Specifically, the kettle body of the health pot or the kettle is also provided with a dry-boiling protection unit, and when the temperature detected by the thermocouple sensor 41 and the NTC sensor 6 is too high, the dry-boiling protection unit cuts off the power supply to the heating unit for protection.

[0047] In one embodiment, the heating plate 7 is an electric heating film microcrystalline glass plate. The electric heating film microcrystalline glass heating plate is a composite of various non-metallic conductive materials such as inorganic ceramics and glass and infrared radiation materials on the outer surface of the microcrystalline glass plate through printing, high-temperature sintering and other processes, and is permanently made into a whole with the glass plate to form an inorganic conductive resistance film layer. After the resistance film layer is powered on and heated, it emits infrared heat, forming a heat radiation source and heating by conduction and convection.

[0048] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. An overheat protection structure, applied to a heating plate, characterized in that: include: An insulating heat-conducting sheet (1) is attached to the bottom of the heating plate; a heat-insulating member (2) is attached to the bottom of the insulating heat-conducting sheet (1), and a mounting through hole is provided in the middle of the heat-insulating member (2); and a mounting bracket (3) is used to support the insulating heat-conducting sheet (1); The heat conduction unit (4) comprises a thermocouple sensor (41), wherein the thermocouple sensor (41) is provided with a top contact portion (42), wherein the top contact portion (42) passes through the mounting through hole and contacts the insulating heat conduction sheet (1).

2. An overheat protection structure according to claim 1, characterized in that: The insulating heat-conducting sheet (1) is a mica plate with a temperature resistance of more than 500° C. and a thickness of 0.1 mm to 0.5 mm.

3. An overheat protection structure according to claim 2, characterized in that: The mounting bracket (3) is a shell member with a vacant cavity (31) at the center; The heat insulating element (2) is arranged in the empty cavity (31).

4. An overheat protection structure according to claim 3, characterized in that: The heat insulating member (2) is heat insulating cotton, and a gap of 1 mm to 2 mm is provided between the bottom surface of the heat insulating cotton and the bottom surface of the vacant cavity (31).

5. The overheat protection structure according to claim 1, characterized in that: It also includes a support unit (5); The support unit (5) comprises a connecting plate (51) and an elastic member (52) connected to the bottom of the mounting bracket (3); The thermocouple sensor (41) is also provided with a pressing portion (43); One end of the elastic member (52) presses the pressing portion (43), and the other end presses the connecting plate (51).

6. An overheat protection structure according to claim 5, characterized in that: A mounting column (32) is provided at the bottom of the mounting bracket (3); The support unit (5) further comprises a locking screw (53), wherein the locking screw (53) passes through the connecting plate (51) and is fixedly connected to the mounting column (32).

7. An overheat protection structure according to claim 5, characterized in that: The elastic member (52) is a spring member, and the pressing portion (43) comprises a positioning end smaller than the inner diameter of the spring member and a round shoulder protruding from the positioning end; One end of the spring element is sleeved on the positioning end and presses the round shoulder.

8. The overheat protection structure according to claim 1, characterized in that: It also includes an NTC sensor (6) arranged around the thermocouple sensor (41), and the mounting bracket (3), the insulating heat conductive sheet (1) and the heating plate are all provided with mounting holes adapted to fit the NTC sensor (6); The NTC sensor (6) is provided with a detection probe passing through the mounting hole.

9. A heating device, characterized in that: It comprises a heating plate (7) and an overheating protection structure (8) as claimed in any one of claims 1 to 8; The heating plate (7) is a circular microcrystalline glass plate.

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