Temperature limiter and electric pressure cooker

Abstract

The utility model discloses a temperature limiter and an electric pressure cooker, and belongs to the technical field of kitchen household appliances, the temperature limiter comprises a mounting plate, an upper cover, a temperature sensor and a spring, the temperature sensor is mounted above the mounting plate through the spring, the temperature sensor is located in the upper cover, the spring is in a compressed state, a connecting rod is arranged on the mounting plate, and the connecting rod is connected with the upper cover. The upper cover is mounted on the mounting plate through a connecting rod, the top of the connecting rod is bent to form a limiting part, and the limiting part of the mounting plate and the connecting rod limits the movement limit of the upper cover. The structure of the temperature limiter is further optimized, and the stability and reliability of the product are improved.

Description

Technical Field

[0001] This application relates to the field of kitchen appliance technology, and in particular to a thermostat and an electric pressure cooker. Background Technology

[0002] As a commonly used kitchen appliance, the core function of an electric pressure cooker is to cook food by heating. During operation, overheating often leads to damage or safety hazards. Therefore, installing an effective temperature limiter is a crucial aspect of electric pressure cooker design.

[0003] In existing technology, electric pressure cookers are typically equipped with a temperature limiter to prevent malfunctions caused by excessively high temperatures during cooking. The main function of the temperature limiter is to automatically cut off the power supply when the food is cooked, the moisture in the inner pot gradually evaporates, and the temperature rises to the set value, ensuring the safe operation of the electric pressure cooker. Existing temperature limiters generally consist of multiple components, including a temperature-sensing soft magnet, a spring, and a permanent magnet. Their working principle is based on the fact that the temperature-sensing soft magnet loses its magnetism when a specific temperature is reached, which in turn causes the circuit to break through the action of the spring.

[0004] Related existing technologies include Chinese patent application "Multi-directional Heating Electric Pressure Cooker", publication number: CN104042105A; which discloses a multi-directional heating electric pressure cooker, which has a safety valve, float valve, fixed turntable, sealing ring, wire foot, wire ring, buckle plate, hand handle, pressure limiting valve, rotating shaft, and opening bending plate on the lid. The stainless steel outer pot body has an inner pot, pressure holding ring, handle, anti-overflow ring, plug hole, plastic foot, button, toothed edge, water box, panel, plastic bottom, electronic controller, indicator light, heating element, temperature sensor, switch top cover, small spring, large spring, silicone ring, bottom cover, heating plate, inner pot bottom, flat head screw, semi-circular heating element, pressure holding heat transfer element, pressing block, and fixing ring. A pivot is installed between the curved lid and the outer pot body, with a spring-loaded bead on the pivot. Heating elements are located on the bottom of the inner pot and on the pressure-conducting heat transfer body. The inner pot has a large opening and a small bottom diameter. The lid is connected to the pot body and can be tilted upright at the top of the pot opening. When cooking rice, it not only provides pressure and prevents steam leakage, but also heats the rice and food simultaneously from bottom to top, from left to right, and from right to left. The cooked rice is evenly cooked, soft, fragrant, and delicious. It is convenient to use and energy-saving and environmentally friendly.

[0005] However, existing temperature limiters have some shortcomings in practical applications. For example, the reliability of the product structure is not high, and they may loosen after repeated use, thus affecting the normal operation of the electric pressure cooker. Furthermore, the installation of the temperature limiter is inconvenient, affecting assembly efficiency and increasing assembly costs. Therefore, developing a new type of electric pressure cooker temperature limiter that can effectively avoid these problems and improve the reliability of the temperature limiter is an important direction for current technological development. Utility Model Content

[0006] The technical problem to be solved by this application is to provide a temperature limiter, further optimize the structure of the temperature limiter, and improve the stability and reliability of the product.

[0007] The technical solution adopted in this application is as follows: a temperature limiter, including a mounting plate, an upper cover, a temperature sensor and a spring. The temperature sensor is mounted on the mounting plate above the mounting plate via the spring. The temperature sensor is located inside the upper cover and the spring is in a compressed state. A connecting rod is provided on the mounting plate. The upper cover is mounted on the mounting plate via the connecting rod. The top of the connecting rod is bent to form a limiting part. The mounting plate and the limiting part of the connecting rod limit the movement limit of the upper cover.

[0008] Compared with existing technologies, the advantages of this application lie in its combined design of a mounting plate, upper cover, temperature sensor, and spring. This simplifies the component composition and makes the overall structure more compact and rational. The rational component layout effectively reduces space occupation and improves product integration. The temperature sensor is enclosed within the upper cover and mounted on the mounting plate via a spring, effectively preventing external environmental influences on the sensor, protecting it, and extending the product's lifespan. The top bend of the connecting rod forms a limiting part, restricting the upward movement limit of the upper cover, while the mounting plate itself restricts the downward movement limit of the upper cover. This design prevents damage or failure of the temperature limiter due to excessive movement during operation, thereby further improving product reliability.

[0009] In some embodiments of this application, the mounting plate has a slot in the middle, and connecting rods are connected to both sides of the slot. The connecting rods are perpendicular to the mounting plate, and the tops of the connecting rods are bent outward to form limiting parts.

[0010] In this application, the connecting rod and the mounting plate are integrally formed, resulting in good structural strength. This reduces the number of parts and assembly steps, simplifying production and maintenance. The connecting rod can be formed by cutting the mounting plate and bending it upwards; when the connecting rod is bent upwards, its original cut position forms the slot in the middle of the mounting plate.

[0011] In some embodiments of this application, the upper cover is a cylindrical structure with a sealed top surface. Connecting pieces extend outward from both ends of the bottom of the upper cover. The connecting pieces have connecting ports adapted to the connecting rod. The connecting rod passes through the connecting ports. The limiting part is located above the connecting ports, and the diameter of the connecting ports is smaller than the diameter of the limiting part.

[0012] In this application, a stable connection structure is formed by the cooperation of the connecting rods on both sides and the connecting plates on both sides, and the upper cover will move steadily up and down along the connecting rods. The movement of the upper cover will drive the temperature sensor to move up and down synchronously. Under the action of the compressed spring, the temperature sensor remains in contact with the inner top surface of the upper cover.

[0013] In some embodiments of this application, the center of the slot is formed into a circular hole, and a flange is provided above the outer periphery of the circular hole. The flange has an arc-shaped structure, and the spring is sleeved on the outside of the flange.

[0014] In this application, the arc-shaped flange effectively restricts the installation position of the spring, preventing the bottom of the spring from wobbling and improving the stability of the product during operation. Preferably, the inner diameter of the spring is equal to the outer diameter of the flange, in which case the flange can maximize the limiting of the spring's stability.

[0015] In some embodiments of this application, the temperature sensor is fitted with a gasket, one end of the spring rests against the mounting plate, and the other end of the spring rests against the gasket.

[0016] The gasket effectively protects the temperature sensor from mechanical shocks or vibrations during operation. As a buffer, the gasket absorbs some of the impact force, thus extending the sensor's lifespan. The spring provides the necessary pressure to ensure the temperature sensor remains in the correct position.

[0017] In some embodiments of this application, the outer diameter of the gasket is adapted to the inner diameter of the top of the upper cover. The temperature sensor is securely mounted inside the upper cover and protected by it. The adaptation of the outer diameter of the gasket to the inner diameter of the top of the upper cover ensures a tight fit of the temperature sensor within the upper cover. This precise fit effectively prevents displacement of the temperature sensor due to vibration or impact during operation, ensuring that it is always in the optimal measuring position.

[0018] In some embodiments of this application, the temperature sensor is connected to a wire assembly that passes through the middle of a spring and through a slot in a mounting plate.

[0019] In this application, the temperature sensor needs to be electrically connected to the control device of the electric pressure cooker, therefore the temperature sensor needs to be connected to a wiring harness. The structural design of this application allows the wiring harness to pass through the center of the entire product, while also protecting the wiring harness and the connection point between the wiring harness and the temperature sensor.

[0020] An electric pressure cooker includes a heat preservation cover and a temperature limiter. The bottom surface of the heat preservation cover has an installation port, the installation plate is installed on the bottom surface of the heat preservation cover, and the upper cover extends out of the bottom surface of the heat preservation cover through the installation port. The heat preservation cover is made of 430 stainless steel.

[0021] Compared to existing technologies, the advantages of this application lie in the design of the mounting port on the bottom of the insulation cover, which simplifies the installation process of the temperature limiter. Users simply insert the upper cover of the temperature limiter into the insulation cover through the mounting port, eliminating the need for complex assembly steps and thus improving assembly efficiency. The mounting plate, installed on the bottom of the insulation cover, provides additional support and stability. This design effectively reduces displacement caused by vibration or external impact, ensuring the reliability of the temperature limiter during operation. Compared to traditional iron structures, the insulation cover of this application has better toughness and resilience, ensuring that the pressure of the electric pressure cooker remains unchanged even after prolonged use.

[0022] In some embodiments of this application, the mounting plate has at least three slots, and a clip is provided on the bottom surface of the insulation cover corresponding to the slots. The clip has an L-shaped structure and is inserted into the slot to engage with the mounting plate.

[0023] In this application, by using the cooperation of the bayonet and the clip, when installing the temperature limiter on the insulation cover, it is only necessary to align the clip with the bayonet, insert the clip into the bayonet, and then rotate the mounting plate in the predetermined direction to realize the installation of the limiter and the insulation cover. The installation is simple and quick.

[0024] In some embodiments of this application, the application further includes a heating plate, wherein the heating plate has a central hole, and the upper cover of the temperature limiter passes through the central hole to the heating plate.

[0025] The aforementioned structure allows the temperature limiter to bypass the influence of the heating plate and directly contact the inner pot of the electric pressure cooker for temperature detection, effectively improving temperature control accuracy and ensuring that the electric pressure cooker can accurately monitor and control the temperature during the cooking process. The heating plate is installed on the inner bottom surface of the insulation cover, and the inner pot of the electric pressure cooker is mounted above the heating plate and located inside the insulation cover.

[0026] Based on common knowledge in the field, the above-described embodiments can be combined arbitrarily. Attached Figure Description

[0027] The present application will be described in further detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present application. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0028] Figure 1 This is a schematic diagram of the temperature limiter in this application;

[0029] Figure 2 This is a front view of the temperature limiter in this application;

[0030] Figure 3 This is a cross-sectional view of the temperature limiter in this application;

[0031] Figure 4 This is a schematic diagram of the bottom structure of the thermal insulation cover in this application;

[0032] Figure 5 for Figure 4 A sectional view.

[0033] The specific explanations of the reference numerals in the attached drawings are as follows: 1. Mounting plate; 2. Upper cover; 3. Temperature sensor; 4. Spring; 5. Connecting rod; 5a. Limiting part; 6. Groove; 7. Connecting piece; 9. Flanged edge; 10. Washer; 11. Wire assembly; 12. Insulation cover; 13. Bayonet; 14. Clip; 15. Center hole. Detailed Implementation

[0034] The present application will now be described in detail with reference to the accompanying drawings.

[0035] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0036] A temperature limiter, as described in Embodiment 1 Figure 1 As shown, the product includes a mounting plate 1, an upper cover 2, a temperature sensor 3, and a spring 4, resulting in a simpler component composition and a more compact and rational overall structure. This rational component layout effectively reduces space occupation and improves product integration. The temperature sensor 3 is mounted above the mounting plate 1 via the spring 4, located inside the upper cover 2. The spring 4 is compressed, effectively enclosing the temperature sensor 3 within the upper cover 2 and preventing external environmental influences, thus protecting the sensor and extending the product's lifespan. A connecting rod 5 is provided on the mounting plate 1, and the upper cover 2 is mounted on the mounting plate 1 via the connecting rod 5. The top of the connecting rod 5 is bent to form a limiting part 5a. The mounting plate 1, connecting rod 5, and limiting part 5a restrict the movement limits of the upper cover 2. The limiting part 5a restricts the upward movement limit of the upper cover 2, while the mounting plate 1 itself restricts the downward movement limit of the upper cover 2. This design prevents damage or failure of the temperature limiter due to excessive movement during operation, thereby further improving product reliability.

[0037] Example 2, as Figures 1 to 3As shown, a slot 6 is provided in the middle of the mounting plate 1, and connecting rods 5 are connected to both sides of the slot 6. The connecting rods 5 are perpendicular to the mounting plate 1, and the tops of the connecting rods 5 are bent outwards to form limiting parts 5a. In this application, the connecting rods 5 and the mounting plate 1 are integrally formed, which has good structural strength. During assembly, the number of parts and assembly steps can be reduced, simplifying the production and maintenance process. The connecting rods 5 can be formed by cutting the mounting plate 1 and bending it upwards. When the connecting rods 5 are bent upwards, their original cutting position forms the slot 6 in the middle of the mounting plate 1.

[0038] The upper cover 2 is a cylindrical structure with a sealed top surface. Connecting pieces 7 extend outwards from both ends of the bottom of the upper cover 2. Each connecting piece 7 has a connection port adapted to the connecting rod 5. The connecting rod 5 passes through the connection port, and the limiting part 5a is located above the connection port. The diameter of the connection port is smaller than the diameter of the limiting part 5a. In this application, a stable connection structure is formed by the cooperation of the connecting rods 5 on both sides and the connecting pieces 7 on both sides. The upper cover 2 will move stably up and down along the connecting rods 5. The movement of the upper cover 2 will drive the temperature sensor 3 to move up and down synchronously. Under the action of the compressed spring 4, the temperature sensor 3 remains in contact with the inner top surface of the upper cover 2.

[0039] The central part of the slot 6 forms a circular hole, and a flange 9 is provided on the upper outer periphery of the circular hole. The flange 9 has an arc-shaped structure, and the spring 4 is sleeved on the flange 9. In this application, the arc-shaped flange 9 can effectively limit the installation position of the spring 4, prevent the bottom of the spring 4 from shaking, and improve the stability of the product during operation. Preferably, the inner diameter of the spring 4 is equal to the outer diameter of the flange 9, in which case the flange 9 can limit the stability of the spring 4 to the maximum extent.

[0040] The temperature sensor 3 is fitted with a washer 10. One end of the spring 4 rests against the mounting plate 1, and the other end rests against the washer 10. The washer 10 effectively protects the temperature sensor 3 from mechanical impact or vibration during operation. As a buffer structure, the washer 10 absorbs some of the impact force, thereby extending the service life of the temperature sensor 3. The spring 4 provides the necessary pressure to ensure that the temperature sensor 3 is always in the correct position.

[0041] The outer diameter of the washer 10 is adapted to the inner diameter of the top of the upper cover 2. The temperature sensor 3 is securely mounted inside the upper cover 2 and protected by it. The fit between the outer diameter of the washer 10 and the inner diameter of the top of the upper cover 2 ensures a tight fit of the temperature sensor 3 within the upper cover 2. This precise fit effectively prevents displacement of the temperature sensor 3 due to vibration or impact during operation, ensuring it remains in the optimal measuring position.

[0042] The temperature sensor 3 is connected to a wire assembly 11, which passes through the center of the spring 4 and through the slot 6 of the mounting plate 1. In this application, the temperature sensor 3 needs to be electrically connected to the control device of the electric pressure cooker; therefore, the temperature sensor 3 needs to be connected to the wire assembly 11. The structural design of this application allows the wire to pass through the center of the entire product effectively, while also protecting the wire assembly 11 and the connection point between the wire assembly 11 and the temperature sensor 3.

[0043] The rest of the contents of Example 2 are the same as those of Example 1.

[0044] An electric pressure cooker, Example 3, as follows: Figures 4 to 5 As shown, the device includes a heat insulation cover 12 and a temperature limiter as described in Embodiment 1 or Embodiment 2. The heat insulation cover 12 has an installation opening on its bottom surface. An installation plate 1 is mounted on the bottom surface of the heat insulation cover 12, and the upper cover 2 extends out of the bottom surface of the heat insulation cover 12 through the installation opening. The design of the installation opening on the bottom surface of the heat insulation cover 12 simplifies the installation process of the temperature limiter. Users only need to insert the upper cover 2 of the temperature limiter into the heat insulation cover 12 through the installation opening, eliminating the need for complex assembly steps and thus improving assembly efficiency. The installation plate 1, mounted on the bottom surface of the heat insulation cover 12, provides additional support and stability. This design effectively reduces displacement caused by vibration or external impact, ensuring the reliability of the temperature limiter during operation. The heat insulation cover 12 is made of 430 stainless steel. Compared to traditional iron structures, the heat insulation cover of this application has better toughness and resilience, ensuring that the pressure of the electric pressure cooker does not change after prolonged use.

[0045] The mounting plate 1 has at least three slots 13. A locking element 14 is provided on the bottom surface of the insulation cover 12 corresponding to each slot 13. The locking element 14 has an L-shaped structure and is inserted into the slot 13 to engage with the mounting plate 1. In this application, through the cooperation of the slots 13 and the locking element 14, when installing the temperature limiter on the insulation cover 12, it is only necessary to align the locking element 14 with the slot 13, insert the locking element 14 into the slot 13, and then rotate the mounting plate 1 in a predetermined direction. This achieves the installation of the temperature limiter and the insulation cover 12, making the installation simple and quick.

[0046] This application also includes a heating plate with a central hole 15. The upper cover 2 of the temperature limiter passes through the central hole 15 through the heating plate. This structure allows the temperature limiter to bypass the influence of the heating plate and directly contact the inner pot of the electric pressure cooker for temperature detection, effectively improving temperature control accuracy and ensuring that the electric pressure cooker can accurately monitor and control the temperature during cooking. The heating plate is installed on the inner bottom surface of the insulation cover 12, and the inner pot of the electric pressure cooker is mounted above the heating plate and located inside the insulation cover 12.

[0047] The present application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present application. The descriptions of the embodiments above are only for the purpose of helping to understand the present application and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A temperature limiter, characterized in that The temperature limiting device comprises a mounting plate (1), an upper cover (2), a temperature sensor (3) and a spring (4), the temperature sensor (3) is installed above the mounting plate (1) through the spring (4), the temperature sensor (3) is located in the upper cover (2), the spring (4) is in a compressed state, a connecting rod (5) is arranged on the mounting plate (1), the upper cover (2) is installed on the mounting plate (1) through the connecting rod (5), the top of the connecting rod (5) is bent to form a limiting portion (5a), and the mounting plate (1), the connecting rod (5) and the limiting portion (5a) limit the movement limit of the upper cover (2).

2. A temperature limiter according to claim 1, characterised in that A slot (6) is formed in the middle of the mounting plate (1), and the two side walls of the slot (6) are connected with the connecting rods (5), the connecting rods (5) are perpendicular to the mounting plate (1), and the tops of the connecting rods (5) are respectively bent to form the limiting portions (5a).

3. A temperature limiter according to claim 2, wherein The upper cover (2) is in a cylindrical structure with a sealed top surface, the bottom ends of the upper cover (2) extend outward to form connecting pieces (7), connecting openings corresponding to the connecting rods (5) are formed in the connecting pieces (7), the connecting rods (5) pass through the connecting openings, the limiting portions (5a) are located above the connecting openings, and the diameter of the connecting openings is smaller than the diameter of the limiting portions (5a).

4. A temperature limiter according to claim 2, wherein The middle of the slot (6) is in a round hole shape to form a round hole portion, a flange (9) is arranged above the outer periphery of the round hole portion, the flange (9) is in a circular arc structure, and the spring (4) is sleeved outside the flange (9).

5. A temperature limiter according to claim 4, wherein A gasket (10) is sleeved outside the temperature sensor (3), one end of the spring (4) abuts against the mounting plate (1), and the other end of the spring (4) abuts against the gasket (10).

6. A temperature limiter according to claim 5, wherein The outer diameter of the gasket (10) is adapted to the inner diameter of the top of the upper cover (2).

7. A temperature limiter according to claim 1, wherein The temperature sensor (3) is connected with a wire group (11), the wire group (11) passes through the middle of the spring (4), and the wire group (11) passes through the slot (6) of the mounting plate (1).

8. An electric pressure cooker characterized by comprising: The temperature limiting device comprises a mounting plate (1), an upper cover (2), a temperature sensor (3) and a spring (4), the temperature sensor (3) is installed above the mounting plate (1) through the spring (4), the temperature sensor (3) is located in the upper cover (2), the spring (4) is in a compressed state, a connecting rod (5) is arranged on the mounting plate (1), the upper cover (2) is installed on the mounting plate (1) through the connecting rod (5), the top of the connecting rod (5) is bent to form a limiting portion (5a), and the mounting plate (1), the connecting rod (5) and the limiting portion (5a) limit the movement limit of the upper cover (2).

9. The electric pressure cooker according to claim 8, characterized in that, A slot (6) is formed in the middle of the mounting plate (1), and the two side walls of the slot (6) are connected with the connecting rods (5), the connecting rods (5) are perpendicular to the mounting plate (1), and the tops of the connecting rods (5) are respectively bent to form the limiting portions (5a).

10. The electric pressure cooker according to claim 8 or 9, characterized in that, The upper cover (2) is in a cylindrical structure with a sealed top surface, the bottom ends of the upper cover (2) extend outward to form connecting pieces (7), connecting openings corresponding to the connecting rods (5) are formed in the connecting pieces (7), the connecting rods (5) pass through the connecting openings, the limiting portions (5a) are located above the connecting openings, and the diameter of the connecting openings is smaller than the diameter of the limiting portions (5a). The middle of the slot (6) is in a round hole shape to form a round hole portion, a flange (9) is arranged above the outer periphery of the round hole portion, the flange (9) is in a circular arc structure, and the spring (4) is sleeved outside the flange (9). A gasket (10) is sleeved outside the temperature sensor (3), one end of the spring (4) abuts against the mounting plate (1), and the other end of the spring (4) abuts against the gasket (10). The outer diameter of the gasket (10) is adapted to the inner diameter of the top of the upper cover (2). The temperature sensor (3) is connected with a wire group (11), the wire group (11) passes through the middle of the spring (4), and the wire group (11) passes through the slot (6) of the mounting plate (1). The temperature limiting device comprises a mounting plate (1), an upper cover (2), a temperature sensor (3) and a spring (4), the temperature sensor (3) is installed above the mounting plate (1) through the spring (4), the temperature sensor (3) is located in the upper cover (2), the spring (4) is in a compressed state, a connecting rod (5) is arranged on the mounting plate (1), the upper cover (2) is installed on the mounting plate (1) through the connecting rod (5), the top of the connecting rod (5) is bent to form a limiting portion (5a), and the mounting plate (1), the connecting rod (5) and the limiting portion (5a) limit the movement limit of the upper cover (2). A heat disc is further arranged, the heat disc is provided with a center hole (15), and the upper cover (2) of the temperature limiting device passes through the heat disc through the center hole (15).

Images