Temperature control structure applied to electric cooking appliance

Abstract

The utility model relates to a temperature control structure applied to an electric cooking appliance, which comprises a heating plate, a heating pipe, a first temperature sensor and a second temperature sensor, the bottom of the heating disc is provided with a first movable connection position used for installing a first temperature sensor and a second movable connection position used for installing a second temperature sensor, and the heating pipe and the first movable connection position are connected through a heat conduction structure. The first movable connection position, the heat conduction structure, the second movable connection position and the heating disc are integrally formed; according to the electric cooking appliance, the two temperature sensors are arranged, so that different temperature sensors are applied when the electric cooking appliance performs different cooking modes, the temperature sensing and control accuracy of the electric cooking appliance is higher, and the food cooking effect is better.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric cookers, and particularly relates to a temperature control structure applied to electric cookers. Background Art

[0002] Electric cookers use electricity to convert into internal energy for cooking. They are widely used in daily life due to their ease of use. However, the quality of an electric cooker's temperature control performance is crucial to the overall user experience. Poor temperature control can easily lead to overcooking or undercooking, negatively impacting the user experience. The main factors influencing an electric cooker's temperature control performance include the heating structure, heat conduction structure, and temperature sensing structure. After the heating structure heats up, the temperature sensing structure senses the actual heating effect. The temperature feedback from the temperature sensing structure adjusts the heating structure to achieve temperature control.

[0003] In the prior art, the temperature control structure of electric cookers is generally as shown in the Chinese utility model patent document with patent authorization publication number CN203263098U. This patent discloses a heating device for an electric cooker and a grilling machine equipped with the same. The thermostat is located at the bottom of the grilling pan, far away from the heating tube. This makes it impossible to accurately detect the temperature of the grilling pan's cooking surface or the temperature at the highest point of the grilling pan. As a result, the temperature of the grilling pan's cooking surface near the heating tube may be higher than the temperature detected by the thermostat. If the temperature of the grilling pan's cooking surface near the heating tube exceeds the maximum temperature the grilling pan can withstand, and the temperature detected by the thermostat has not yet reached this temperature value, the electric cooker continues to operate, which may damage the non-stick coating of the electric cooker, generate oil smoke, carbonize food, and even cause accidents.

[0004] Therefore, how to accurately detect the temperature of the cooking surface in an electric cooker is one of the key difficulties in the temperature control technology of electric cooker products. By accurately detecting the temperature of the cooking surface in the electric cooker, the heating structure can be adjusted according to the temperature, so that the cooking surface temperature is consistent with the cooking temperature required by the user, thereby improving the temperature control performance and safety performance of the electric cooker and providing a better user experience. Utility Model Content

[0005] In order to overcome the deficiencies of the prior art, the utility model provides a temperature control structure applied to an electric cooker.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A temperature control structure for an electric cooker includes a heating plate, a heating tube, a first temperature sensor, and a second temperature sensor. The heating tube is integrally riveted, welded, or die-casted with the heating plate. A first movable joint for mounting the first temperature sensor and a second movable joint for mounting the second temperature sensor are provided at the bottom of the heating plate. A heat conduction structure is provided between the heating tube and the first movable joint. The first movable joint, the heat conduction structure, the second movable joint, and the heating plate are integrally formed. The first temperature sensor is embedded in the first movable joint and contacts the inner wall of the first movable joint. The second temperature sensor is embedded in the second movable joint and contacts the inner wall of the second movable joint. The closest distance H between the heating tube and the inner wall of the heating plate is equal to the distance L between the heating tube and the first temperature sensor. The first temperature sensor is used to detect the maximum temperature of the inner wall of the heating plate. A reduction groove is provided on the outer periphery of the second movable joint to reduce heat conduction. The second temperature sensor is used to detect the temperature of the cooking liquid on the inner wall of the heating plate.

[0008] In the present invention, the first temperature sensor is movably embedded in the first movable connection position, and the bottom of the first temperature sensor is provided with an elastic piece for making the first temperature sensor close to the top of the first movable connection position; and / or, the second temperature sensor is movably embedded in the second movable connection position, and the bottom of the second temperature sensor is provided with an elastic piece for making the second temperature sensor close to the top of the second movable connection position.

[0009] In the present invention, the wall thickness of the reduced groove corresponding to the bottom of the heating plate is proportional to the width of the reduced groove.

[0010] In the present invention, a mounting groove is provided at the bottom of the heating plate, and the heating tube is inserted and fixed in the mounting groove and contacts the inner wall of the mounting groove.

[0011] In the present invention, uniform conduction curved surfaces are provided on both sides of the mounting groove for enabling the heating tube to conduct heat evenly and quickly to the inner wall of the heating plate. The distance S1 between the uniform conduction curved surface and the inner wall of the heating plate decreases as the distance S2 between the uniform conduction curved surface and the heating tube increases.

[0012] In the present invention, a first column protruding downward is provided at the bottom of the heating plate, and the first column is provided with a first mounting hole with a bottom opening to form a first movable connection position.

[0013] In the present invention, a second column protruding downward is further provided at the bottom of the heating plate. The second column is provided with a second mounting hole with a bottom opening to form a second movable connection position, and the cutting groove surrounds the outer circumference of the second column.

[0014] The beneficial effects of the utility model are as follows: by providing two temperature sensors, different temperature sensors are applied when the electric cooker performs different cooking methods, so that the accuracy of temperature sensing and control of the electric cooker is higher and the food cooking effect is better;

[0015] When the electric cooker is used for dry cooking such as grilling, frying, or stir-frying, the operation of the heating element is controlled by the temperature detected by the first temperature sensor. When the temperature detected by the first temperature sensor exceeds the maximum temperature that the heating plate can withstand, the first temperature sensor sends a feedback signal to the control circuit board of the electric cooker, which controls the heating element to be powered off, preventing the heating plate from continuing to heat above the maximum temperature, which could damage the non-stick coating, generate oil smoke, carbonize food, or cause accidents. At the same time, the electric cooker can also be set to a temperature below the maximum temperature, so that the electric cooker operates at the set temperature value. The temperature value detected by the first temperature sensor is compared with the set temperature value to control the actual operating power of the heating element, achieving precise, stable, and safe temperature control.

[0016] When the electric cooker is used for wet cooking such as boiling, frying, or making soup, the second temperature sensor can accurately detect the temperature of the cooking liquid and feed the detected temperature back to the control circuit board. The control circuit board controls the operation of the heating tube, so that the cooking temperature of the electric cooker is consistent with the set temperature, thereby ensuring the accuracy of the temperature control of the electric cooker. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the overall structure of the electric cooker of this embodiment;

[0018] Figure 2 Schematic diagram of the installation structure of the first temperature sensor and the second temperature sensor in this embodiment;

[0019] Figure 3 This is a three-dimensional diagram of the bottom structure of the heating tube and the heating plate riveted together in one piece in this embodiment;

[0020] Figure 4 This is a front view of the bottom structure of the heating tube and the heating plate riveted together in one piece in this embodiment;

[0021] Figure 5 for Figure 4 Cross-sectional view of the middle section AA;

[0022] Figure 6 This is a schematic diagram of the installation structure of the first temperature sensor and the elastic member in this embodiment;

[0023] Figure 7 This is a three-dimensional diagram of the bottom structure of the heating tube and the heating plate in this embodiment, which are integrally die-cast. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

[0025] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...), then the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0026] In addition, if there are descriptions involving "first" or "second" in the embodiments of the present invention, the descriptions of "first" or "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0027] like Figures 1 to 7As shown, this embodiment discloses a temperature control structure for an electric cooker, which can be used in a removable, removable, and cleanable electric cooker. The structure includes a heating plate 1, a heating tube 2, and a first temperature sensor 3. The bottom of the heating plate 1 is provided with a mounting groove 11 for mounting the heating tube 2 and a first movable connection position 12 for mounting the first temperature sensor 3. A heat conduction structure 13 is provided between the mounting groove 11 and the first movable connection position 12. The mounting groove 11, the first movable connection position 12, and the heat conduction structure 13 are integrally formed with the heating plate 1. The heating tube 2 is fixed in the mounting groove 11 and contacts the inner wall of the mounting groove 11. The heating tube 2 can also be integrally formed when the mounting groove 11 is formed, fully enclosing the mounting groove 11. The first temperature sensor 3 is embedded in the first movable connection position 12 and contacts the inner wall of the first movable connection position 12. The closest distance H between the heating tube 2 and the inner wall of the heating plate 1 is equal to the distance L between the heating tube 2 and the first temperature sensor 3. The location on the inner wall of the heating plate 1 closest to the heating tube 2 experiences the highest heating temperature. Since the closest distance H between the heating tube 2 and the inner wall of the heating plate 1 is equal to the distance L between the heating tube 2 and the first temperature sensor 3, the amount of heat transferred from the heating tube 2 to the inner wall of the heating plate 1 through the distance H is equal to the amount of heat transferred from the heating tube 2 to the first temperature sensor 3 through the distance L. The temperature value detected by the first temperature sensor 3 is equal to the temperature value at the location with the highest temperature on the inner wall of the heating plate 1. The operation of the heating tube 2 is controlled by the temperature detected by the first temperature sensor 3. The maximum temperature is set before the electric cooker leaves the factory based on the high-temperature resistance of the heating plate 1. When the temperature detected by the first temperature sensor exceeds the maximum temperature that the heating plate 1 can withstand, the first temperature sensor sends a signal to the control circuit board of the electric cooker, which then powers off the heating tube 2, preventing the heating plate 1 from continuing to heat above the maximum temperature, which could damage the non-stick coating, generate smoke, carbonize the food, or cause an accident. The electric cooker can also be set to a temperature below the maximum temperature, maintaining operation at the set temperature. The temperature detected by the first temperature sensor 3 is compared with the set temperature to control the actual operating power of the heating tube 2, achieving precise, stable, and safe temperature control. Of course, the heating tube 2 and the heating plate 1 can also be riveted, welded, or die-cast integrally to form a one-piece structure. This provides a tighter connection and stronger contact between the heating tube 2 and the heating plate 1, minimizing heat loss and increasing utilization, thereby achieving energy conservation and environmental protection. Furthermore, the heating plate 1 and the base 6 can be separated and disassembled, allowing the heating plate 1 to be placed in water for cleaning. This makes it convenient for people to clean the heating plate 1 by simply placing it in a water pan or dishwasher, solving the problem of inconvenient pot cleaning in current electric cookers.

[0028] In this embodiment, the temperature control structure also includes a second temperature sensor 4. The bottom of the heating plate 1 is also provided with a second movable connection position 14 for installing the second temperature sensor 4. The outer periphery of the second movable connection position 14 is provided with a reduction groove 15 for reducing heat conduction. The second temperature sensor 4 is used to detect the temperature of the inner wall of the heating plate 1. By providing the reduction groove 15 on the outer periphery of the second movable connection position 14, the heat conducted inward from the outer periphery of the second movable connection position 14 is reduced, so that the heat in the second movable connection position 14 is more derived from the inner wall of the heating plate 1. The temperature detected by the second temperature sensor 4 in the second movable connection position 14 is closer to the temperature of the inner wall of the heating plate 1, and the detection accuracy is higher. In addition, in order to make the temperature detected by the second temperature sensor 4 closer to the temperature of the inner wall of the heating plate 1 and more accurate, the wall thickness of the bottom of the heating plate 1 corresponding to the reduction groove 15 is proportional to the width of the reduction groove 15. Preferably, the wall thickness of the reduced groove 15 corresponding to the bottom of the heating plate 1 is equal to the minimum wall thickness of the bottom of the heating plate 1 to ensure its structural strength. The width of the reduced groove 15 is set so that the temperature detected by the second temperature sensor 4 is equal to the temperature of the cooking liquid on the inner wall of the heating plate 1. The width of the reduced groove 15 is set based on the amount of heat transferred from the heating tube 2 to the second temperature sensor 4. When the wall thickness of the bottom of the heating plate 1 corresponding to the reduced groove 15 is thicker, the heating tube 2 transfers more heat to the second temperature sensor 4, and the heat transfer from the heating tube 2 has a greater impact on the second temperature sensor 4. Therefore, a larger width of the reduced groove 15 is required to prevent the heat from the heating tube 2 from transferring to the second temperature sensor 4. When the wall thickness of the bottom of the heating plate 1 corresponding to the reduced groove 15 is thinner, the heating tube 2 transfers less heat to the second temperature sensor 4, and the heat transfer from the heating tube 2 has a smaller impact on the second temperature sensor 4. Therefore, a smaller width of the reduced groove 15 is required to prevent excessive heat from transferring to the second temperature sensor 4, thereby ensuring that the temperature detected by the second temperature sensor 4 is equal to the temperature of the cooking liquid on the inner wall of the heating plate 1. The top surface of the second movable connection position 14 is flush with or lower than the top surface of the reduction groove 15, so the detection point of the second temperature sensor 4 is located closest to the inner wall of the heating plate 1, and the temperature detection accuracy is higher.

[0029] Preferably, when the heating plate 1 is used as a dry-cooking plate, such as a grilling plate, frying plate, or stir-fry plate, the first temperature sensor 3 can accurately detect the highest temperature of the inner wall of the heating plate 1 at the location closest to the heating tube 2, since the inner wall of the heating plate 1 is in the dry-cooking state. This allows the first temperature sensor 3 to accurately detect the highest temperature of the inner wall of the heating plate 1, thereby preventing damage to the heating plate 1 caused by excessive dry-cooking. When the heating plate 1 is used as a wet-cooking plate, such as a boiling plate, frying plate, or soup plate, the heat from the inner wall of the heating plate 1 is transferred to the cooking liquid, making the temperature of the inner wall of the heating plate 1 substantially consistent. The second temperature sensor 4 can more accurately detect the temperature of the cooking liquid and feed the detected temperature back to the control circuit board, which controls the operation of the heating tube 2, thereby ensuring that the cooking temperature of the electric cooker is consistent with the set temperature, thereby ensuring the accuracy of the temperature control of the electric cooker.

[0030] In this embodiment, in order to ensure uniform heating of the inner wall of the heating plate 1, uniform conductive curved surfaces 16 are provided on both sides of the mounting groove 11 for uniformly and quickly conducting heat from the heating tube 2 to the inner wall of the heating plate 1. The spacing S1 between the uniform conductive curved surface 16 and the inner wall of the heating plate 1 decreases as the distance S2 between the uniform conductive curved surface 16 and the heating tube 2 increases. That is, the wall thickness of the heating plate 1 corresponding to the uniform conductive curved surface 16 increases as it is closer to the heating tube 2. As a result, the heat generated by the heating tube 2 can be uniformly conducted to various positions on the inner wall of the heating plate 1, so that the inner wall of the heating plate 1 is uniformly heated, and the temperature difference caused by insufficient heat conduction in the portion of the inner wall of the heating plate 1 farther from the heating tube 2 is prevented.

[0031] Preferably, the bottom of the heating plate 1 is provided with a downwardly protruding first column 17, which is provided with a first mounting hole with a bottom opening to form a first movable connection point 12. The heat conduction structure 13 connects the outer wall of the first column 17 with the outer wall of the mounting groove 11, so that the heat generated by the heating tube 2 can be conducted to the first temperature sensor 3 through the heat conduction structure 13. The bottom of the heating plate 1 is also provided with a downwardly protruding second column 18, which is provided with a second mounting hole with a bottom opening to form a second movable connection point 14. The reduction groove 15 surrounds the outer circumference of the second column 18.

[0032] Preferably, in order to make the temperature sensor close to the heating plate and ensure accurate temperature detection, the first temperature sensor 3 is movably embedded in the first movable connection position 12, and the bottom of the first temperature sensor 3 is provided with an elastic member 5 for making the first temperature sensor 3 close to the top of the first movable connection position 12; and / or, the second temperature sensor 4 is movably embedded in the second movable connection position 14, and the bottom of the second temperature sensor 4 is provided with an elastic member 5 for making the second temperature sensor 4 close to the top of the second movable connection position 14. In order to facilitate and accurately install the first temperature sensor 3 and the second temperature sensor 4, the first mounting hole and the second mounting hole are both tapered introduction holes with a larger bottom and a smaller top. The first temperature sensor 3 and the second temperature sensor 4 are both fixed to the base 6 of the electric cooker. When the heating plate 1 and the base 6 are assembled, the first temperature sensor 3 and the second temperature sensor 4 on the base 6 are automatically aligned and introduced into the first movable connection position 12 and the second movable connection position 14.

[0033] The above description is only a preferred embodiment of the present invention. Any technical solution that achieves the purpose of the present invention by substantially the same means shall fall within the scope of protection of the present invention.

Claims

1. A temperature control structure applied to an electric cooker, characterized by: The invention comprises a heating plate (1), a heating tube (2), a first temperature sensor (3) and a second temperature sensor (4); the heating tube (2) and the heating plate (1) are integrally riveted, welded or die-cast; the bottom of the heating plate (1) is provided with a first movable joint (12) for installing the first temperature sensor (3) and a second movable joint (14) for installing the second temperature sensor (4); a heat conduction structure (13) is provided between the heating tube (2) and the first movable joint (12) for connection; the first movable joint (12), the heat conduction structure (13), the second movable joint (14) and the heating plate (1) are integrally formed; the first temperature sensor (1) is integrally formed with the heating plate (1); The sensor (3) is embedded in the first movable joint (12) and contacts the inner wall of the first movable joint (12); the second temperature sensor (4) is embedded in the second movable joint (14) and contacts the inner wall of the second movable joint (14); the closest distance H between the heating tube (2) and the inner wall of the heating plate (1) is equal to the distance L between the heating tube (2) and the first temperature sensor (3); the first temperature sensor (3) is used to detect the maximum temperature of the inner wall of the heating plate (1); the outer periphery of the second movable joint (14) is provided with a reduction groove (15) for reducing heat conduction; the second temperature sensor (4) is used to detect the temperature of the cooking liquid on the inner wall of the heating plate (1).

2. The temperature control structure for an electric cooker according to claim 1, characterized in that: The first temperature sensor (3) is movably embedded in the first movable connection position (12), and the bottom of the first temperature sensor (3) is provided with an elastic member (5) for making the first temperature sensor (3) close to the top of the first movable connection position (12); and / or the second temperature sensor (4) is movably embedded in the second movable connection position (14), and the bottom of the second temperature sensor (4) is provided with an elastic member (5) for making the second temperature sensor (4) close to the top of the second movable connection position (14).

3. The temperature control structure for an electric cooker according to claim 1, characterized in that: The wall thickness of the reduced groove (15) corresponding to the bottom of the heating plate (1) is proportional to the width of the reduced groove (15).

4. The temperature control structure for an electric cooker according to claim 1, characterized in that: The bottom of the heating plate is provided with a mounting groove (11), and the heating tube (2) is snapped into and fixed in the mounting groove (11) and contacts the inner wall of the mounting groove (11).

5. The temperature control structure for an electric cooker according to claim 4, characterized in that: Uniform conductive curved surfaces (16) are provided on both sides of the mounting groove (11) for uniformly and quickly conducting heat from the heating tube (2) to the inner wall of the heating plate (1), and a distance S1 between the uniform conductive curved surface (16) and the inner wall of the heating plate (1) decreases as a distance S2 between the uniform conductive curved surface (16) and the heating tube (2) increases.

6. The temperature control structure for an electric cooker according to claim 1, characterized in that: A first upright post (17) protruding downward is provided at the bottom of the heating plate (1), and the first upright post (17) is provided with a first mounting hole with a bottom opening to form a first movable connection position (12).

7. The temperature control structure for an electric cooker according to claim 1, characterized in that: The bottom of the heating plate (1) is further provided with a second column (18) protruding downwards, and the second column (18) is provided with a second mounting hole with a bottom opening to form a second movable connection position (14), and the cutting groove (15) surrounds the outer periphery of the second column (18).

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