Temperature detection device for electric rice cooker

Abstract

This utility model discloses a rice cooker temperature detection device, relating to the field of rice cooker temperature detection technology, including a temperature sensor, a rice cooker lid, and a rice cooker ECU. This utility model uses a temperature sensor sealed to the lid, with the sensor probe extending into the pot. After being sealed to the lid by a sealing ring, the internal temperature is not leaked out, ensuring a small error between the temperature detected by the sensor and the actual temperature inside the pot. The sensor probe is a high-precision NTC thermistor, encased in a high-efficiency stainless steel probe shell. A shell fixing plate is provided on the probe shell to fix it to the rice cooker lid, ensuring accurate positioning of the temperature sensor probe. The other end is connected to the rice cooker ECU via a wiring harness connector, feeding back the temperature detected by the sensor probe to the ECU. The ECU then instructs the thermostat to adjust the internal temperature of the rice cooker during operation, facilitating precise control of the internal temperature, improving the fluffiness and texture of the rice.

Description

Technical Field

[0001] This utility model relates to the field of electric rice cooker temperature detection technology, specifically an electric rice cooker temperature detection device. Background Technology

[0002] An electric rice cooker is a kitchen appliance that uses electrical energy to convert into heat energy for cooking. It is mainly used for cooking rice, but also has multiple cooking functions such as steaming, boiling, stewing, and simmering. Its core features include automatic keep-warm function, timer operation, and precise heating through temperature control. The basic function is mainly cooking rice, and some models support diversified operations such as making soup and stewing meat. Smart rice cookers adjust the heat in real time through computer chip programs to improve cooking efficiency and taste. The basic structure includes an inner pot, heating plate (or heating wire), thermostat, and insulation layer. The inner pot is made of various materials, such as stainless steel, ceramic, and purple clay. Some high-end products use pure iron inner pots to improve heat conduction performance.

[0003] Currently, most rice cookers on the market lack an internal temperature detection device during operation, resulting in inaccurate temperature control and significant differences in the fluffiness of the cooked rice, which affects its taste. Utility Model Content

[0004] The purpose of this utility model is to solve the above-mentioned technical problems by providing a rice cooker internal temperature detection device, which can accurately control the internal temperature of the rice cooker during operation, improve the fluffiness of rice, and enhance the taste of rice.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a rice cooker temperature detection device, comprising a temperature sensor, a rice cooker lid, and a rice cooker ECU, wherein the temperature sensor is the main part of this detection device, and the temperature sensor is composed of an NTC thermistor, epoxy resin filler, wires, a probe housing, an inner heat shrink tubing, an outer heat shrink tubing, a connector, and a sealing ring. The housing fixing plate of the temperature sensor is fixedly connected to the rice cooker lid through a positioning hole, so that the probe housing of the temperature sensor and the rice cooker lid are sealed together by the sealing ring of the temperature sensor, ensuring that the temperature inside the rice cooker does not leak out. The connector of the temperature sensor is connected to the rice cooker ECU, thus forming the rice cooker temperature detection device.

[0006] As a further improvement of this utility model: the temperature sensor is made of NTC thermistor with high temperature accuracy and Teflon wire with high temperature resistance, and the pins of the NTC thermistor are soldered to the core wire of the wire by soldering or resistance welding.

[0007] As a further improvement of this utility model: the temperature sensor is encased in a stainless steel probe shell with high thermal conductivity, and the welded NTC thermistor is filled and fixed to the probe shell with epoxy resin filler with high temperature resistance.

[0008] As a further improvement of this utility model, the two positioning holes of the outer shell fixing plate of the probe shell are fixed to the upper cover of the rice cooker to ensure that the probe shell of the temperature sensor is accurately positioned.

[0009] As a further improvement of this utility model: the outer surface of the wire is protected by internal heat shrink tubing, and the wire near the probe housing port is protected by external heat shrink tubing to prevent the wire from bending or breaking.

[0010] As a further improvement of this utility model, the other end of the wire is crimped to the connector terminal.

[0011] As a further improvement of this utility model: the temperature sensor uses a high-temperature resistant sealing ring installed on the probe housing, which is combined with the rice cooker lid and the housing fixing plate to achieve sealing and fixation.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] The temperature sensor is sealed to the lid, with its probe extending into the pot. After being sealed to the lid with a sealing ring, the internal temperature is prevented from leaking out, ensuring minimal error between the temperature detected by the sensor and the actual temperature inside the pot. The sensor probe is a high-precision NTC thermistor, encased in a high-efficiency stainless steel shell. A mounting plate is installed on the probe shell to fix it to the rice cooker lid, ensuring precise positioning of the sensor probe. The other end connects to the rice cooker ECU via a wiring harness connector, feeding back the temperature detected by the sensor probe to the ECU. The ECU then instructs the thermostat to adjust the internal temperature of the rice cooker during operation, facilitating precise control of the internal temperature, improving the fluffiness and texture of the rice.

[0014] By selecting NTC thermistors with high temperature accuracy, the probe is encased in a stainless steel probe shell with high thermal conductivity. The probe shell and the NTC thermistor are filled and fixed with high-temperature resistant epoxy resin filler. High-temperature resistant Teflon wires are used to connect to the NTC thermistors. The wires are crimped to the connector terminals. Heat shrink tubing is used to heat shrink and fix the wires at the bends in the probe shell to prevent the wires from bending and breaking. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the installation of the probe housing of this utility model;

[0017] Figure 3 This is a schematic diagram of the installation of the NTC thermistor of this utility model.

[0018] In the diagram: 1. NTC thermistor; 2. Epoxy resin filler; 3. Wire; 4. Probe housing; 5. Inner heat shrink tubing; 6. Outer heat shrink tubing; 7. Connector; 8. Sealing ring; 9. Rice cooker lid; 10. Temperature sensor; 11. Rice cooker ECU. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figures 1-3 In this embodiment of the utility model, a rice cooker temperature detection device includes a temperature sensor 10, a rice cooker lid 9, and a rice cooker ECU 11. The temperature sensor 10 is the main part of this detection device. The temperature sensor 10 is composed of an NTC thermistor 1, epoxy resin filler 2, wires 3, a probe housing 4, an inner heat shrink tubing 5, an outer heat shrink tubing 6, a connector 7, and a sealing ring 8. The positioning hole of the housing fixing plate 4-1 of the temperature sensor 10 is fixedly connected to the rice cooker lid, so that the probe housing 4 of the temperature sensor 10 and the rice cooker lid 9 are sealed together by the sealing ring 8 of the temperature sensor 10, ensuring that the temperature inside the rice cooker does not leak out. The connector 7 of the temperature sensor 10 is connected to the rice cooker ECU 11, forming the rice cooker temperature detection device.

[0021] In this embodiment: When the rice cooker is working, the temperature inside the pot rises. The probe housing 4 of the temperature sensor 10 senses the temperature inside the rice cooker and feeds back the temperature change to the rice cooker ECU 11 through the connector 7 in the temperature sensor 10. After receiving the feedback from the temperature sensor 10, the rice cooker ECU 11 makes a command to the rice cooker thermostat through calculation. After receiving the command, the rice cooker thermostat adjusts the temperature inside the pot.

[0022] A temperature sensor 10 is sealed to the pot lid. The probe of the temperature sensor 10 extends into the pot and is sealed to the pot lid by a sealing ring 8, preventing the temperature inside the pot from leaking out. This ensures that the temperature detected by the temperature sensor 10 has a small error with the actual temperature inside the pot. The probe of the temperature sensor 10 is made of a high-precision NTC thermistor 1 and is encased in a stainless steel probe shell 4 with high heat transfer efficiency. A shell fixing plate 4-1 is set on the probe shell 4 and fixed to the top lid of the rice cooker to ensure the precise position of the temperature sensor 10 probe. The other end is connected to the rice cooker ECU 11 through a wire harness connector 7, feeding back the temperature detected by the temperature sensor 10 probe to the ECU. The ECU instructs the thermostat to adjust the temperature inside the pot when the rice cooker is working, which facilitates precise control of the temperature inside the pot when the rice cooker is working, improves the fluffiness of the rice, and enhances the taste of the rice.

[0023] The temperature sensor 10 of this temperature detection device is an NTC thermistor 1 with high temperature accuracy. The probe is encased in a stainless steel probe housing 4 with high thermal conductivity. The probe housing 4 and the NTC thermistor 1 are filled and fixed with high-temperature resistant epoxy resin filler 2. A high-temperature resistant Teflon wire 3 is used to connect to the NTC thermistor 1. The wire 3 is crimped to the connector 7 terminal. Heat shrink tubing is used to heat shrink and fix the wire 3 at the bend of the probe housing 4 and the wire 3 to prevent the wire 3 from bending and breaking.

[0024] Please refer to this carefully. Figures 1-3 The temperature sensor 10 uses a high-accuracy NTC thermistor 1 and a high-temperature resistant Teflon wire 3. The pins 1-1 of the NTC thermistor 1 and the core wire 3-1 of the wire 3 are soldered together by soldering or resistance welding.

[0025] In this embodiment, it is convenient to fix the connection between the NTC thermistor 1 and the wire 3, and to facilitate the detection operation through the NTC thermistor 1.

[0026] Please refer to this carefully. Figures 1-3 The temperature sensor 10 is encased in a stainless steel probe housing 4 with high thermal conductivity, and the welded NTC thermistor 1 is filled and fixed to the probe housing 4 with epoxy resin filler 2 with high temperature resistance.

[0027] In this embodiment: the probe housing 4 has high thermal conductivity, which facilitates temperature detection by the internal NTC thermistor 1, and the epoxy resin filler 2 is used to facilitate fixing the NTC thermistor 1 inside the probe housing 4.

[0028] Please refer to this carefully. Figures 1-3 The two positioning holes of the outer shell fixing plate 4-1 of the probe shell 4 are fixed to the upper cover of the rice cooker to ensure that the probe shell 4 of the temperature sensor 10 is accurately positioned.

[0029] In this embodiment, it facilitates quick installation of the probe housing 4 and ensures accurate positioning of the probe housing 4.

[0030] Please refer to this carefully. Figures 1-3 The wire 3 is protected by an inner heat shrink tubing 5, and the wire 3 near the probe housing 4 port is protected by an outer heat shrink tubing 6 to prevent the wire 3 from bending and breaking. The other end of the wire 3, the core wire 3-1, is crimped to the connector 7 terminal.

[0031] In this embodiment: the probe housing 4 of the temperature sensor 10 senses the temperature inside the rice cooker and feeds back the temperature change to the rice cooker ECU 11 through the connector 7 in the temperature sensor 10. After receiving the feedback from the temperature sensor 10, the rice cooker ECU 11 performs calculations and issues a command to the rice cooker thermostat. After receiving the command, the rice cooker thermostat adjusts the temperature inside the rice cooker.

[0032] Please refer to this carefully. Figures 1-3 The temperature sensor 10 uses a high-temperature resistant sealing ring 8, which is installed on the probe housing 4 and combined with the rice cooker lid 9 and the housing fixing plate 4-1 to achieve sealing and fixation.

[0033] In this embodiment: the temperature sensor 10 is sealed to the pot lid, and the probe of the temperature sensor 10 extends into the pot. After being sealed to the pot lid by the sealing ring 8, the temperature inside the pot does not leak out, ensuring that the temperature detected by the temperature sensor 10 has a small error with the actual temperature inside the pot.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A rice cooker temperature detection device, characterized in that, The device includes a temperature sensor (10), a rice cooker lid (9), and a rice cooker ECU (11). The temperature sensor (10) is the main part of this detection device. The temperature sensor (10) is composed of an NTC thermistor (1), epoxy resin filler (2), wire (3), probe housing (4), inner heat shrink tubing (5), outer heat shrink tubing (6), connector (7), and sealing ring (8). The positioning hole of the housing fixing plate (4-1) of the temperature sensor (10) is fixedly connected to the rice cooker lid, so that the probe housing (4) of the temperature sensor (10) and the rice cooker lid (9) are sealed and connected through the sealing ring (8) of the temperature sensor (10) to ensure that the temperature inside the rice cooker does not leak out. The connector (7) of the temperature sensor (10) is connected to the rice cooker ECU (11) to form a rice cooker temperature detection device.

2. The electric rice cooker temperature detection device according to claim 1, characterized in that, The temperature sensor (10) is made of a high-temperature-accuracy NTC thermistor (1) and a high-temperature-resistant Teflon wire (3). The pins (1-1) of the NTC thermistor (1) and the core wire (3-1) of the wire (3) are soldered together by soldering or resistance welding.

3. The electric rice cooker temperature detection device according to claim 1, characterized in that, The temperature sensor (10) is wrapped with a stainless steel probe shell (4) with high thermal conductivity, and the welded NTC thermistor (1) is filled and fixed with epoxy resin filler (2) with high temperature resistance.

4. The electric rice cooker temperature detection device according to claim 1, characterized in that, The two positioning holes of the outer shell fixing plate (4-1) of the probe shell (4) are fixed to the upper cover of the rice cooker to ensure that the probe shell (4) of the temperature sensor (10) is accurately positioned.

5. The electric rice cooker temperature detection device according to claim 1, characterized in that, The wire (3) is protected by an inner heat shrink tubing (5), and the wire (3) near the port of the probe housing (4) is protected by an outer heat shrink tubing (6) to prevent the wire (3) from bending and breaking.

6. The electric rice cooker temperature detection device according to claim 1, characterized in that, The other end of the wire (3) is crimped with the core wire (3-1) of the connector (7).

7. The electric rice cooker temperature detection device according to claim 4, characterized in that, The temperature sensor (10) is fitted with a high-temperature resistant sealing ring (8) on the probe housing (4) and combined with the rice cooker lid (9) and the housing fixing plate (4-1) to achieve sealing and fixing.

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