Temperature measuring assembly for measuring temperature of outer wall of frying pan of cooking machine

Abstract

The utility model discloses a temperature measuring assembly for measuring the temperature of the outer wall of a frying pan of a cooking machine, which comprises a strip plate arranged outside the frying pan, a temperature sensor fixed on the strip plate and a fusing device fixedly connected on the strip plate and capable of synchronously rotating along with the frying pan, the fusing device comprises a fusing body which enables a power supply circuit of the frying pan heating device to be disconnected when the temperature of the outer wall of the frying pan reaches a limiting temperature value, and the fusing body detects the temperature of the outer wall of the frying pan in a heat radiation mode. By arranging the fuse link and the temperature sensor, double insurance is achieved on temperature detection of the outer wall of the wok, the wok can be effectively prevented from being on fire due to overtemperature, and the wok is simple in structure, small in occupied space and very convenient to install.

Description

Technical Field

[0001] This utility model relates to the field of temperature measurement of the outer wall of the wok of a cooking machine, and more particularly to a temperature measuring component for measuring the temperature of the outer wall of the wok of a cooking machine. Background Technology

[0002] In existing cooking machines, temperature sensors are installed on the outer wall of the wok to collect its temperature in order to achieve intelligent temperature control. However, due to problems such as aging, poor contact or disconnection of the signal line during use, or damage caused by wear and tear, the temperature data collected by the temperature sensor may be inaccurate or invalid. If the main control circuit does not receive the temperature data of the wok wall, the wok heating device will continue to heat the wok, causing the oil and organic matter in the wok to be heated to near the ignition point. If not dealt with in time, this may cause an overheating fire. Therefore, it is essential to add an overheat protection device to prevent the wok from overheating and catching fire. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a temperature measuring component for measuring the outer wall temperature of a wok in a cooking machine that has high reliability, can promptly cut off the power to the wok when the temperature sensor fails, and can completely eliminate safety hazards.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A temperature measuring component for measuring the outer wall temperature of a wok in a stir-fry machine is provided. The component includes a long strip plate disposed outside the wok, a temperature sensor fixed on the long strip plate, the temperature sensor probe being in close contact with the outer wall of the wok, and a fuse device fixed to the long strip plate and capable of rotating synchronously with the wok. The fuse device includes a fuse element that disconnects the power supply circuit of the wok heating device when the outer wall temperature of the wok reaches a limit temperature value. The fuse element detects the temperature of the outer wall of the wok by means of thermal radiation.

[0006] Preferably, the fuse device includes a support plate, which is divided into a base plate and a positioning plate. The base plate is fixed to the back side of the long strip plate, and the positioning plate is connected to one side of the base plate and placed next to the arc plate. The fuse is fixedly installed on the inner side of the positioning plate and faces the outer wall of the wok. The signal line of the fuse is led out from top to bottom and electrically connected to the conductive slip ring located below the wok.

[0007] Preferably, the bottom side of the positioning plate is provided with a limiting strip that extends inward and is placed at the bottom of the fuse to restrict the downward movement of the fuse.

[0008] Preferably, the fuse is a low-temperature fuse.

[0009] Preferably, the gap is in the range of 3mm-6mm.

[0010] By installing a fuse spaced apart from the outer wall of the wok, the temperature of the wok wall is transferred to the fuse through thermal radiation. Thus, when the temperature sensor malfunctions and the temperature of the wok wall reaches its limit, the fuse can immediately send a signal to the main control circuit of the cooking machine, causing the main control circuit to disconnect the power supply circuit of the wok heating device that provides heat to the wok. The temperature sensor and the fuse provide double protection for detecting the temperature of the wok wall, effectively preventing the safety hazard of the wok overheating and catching fire. Attached Figure Description

[0011] Figure 1 It is a three-dimensional view of the installation of the temperature sensor, fuse, and wok.

[0012] Figure 2 An 3D view of the installation of the temperature sensor and fuse.

[0013] Figure 3 Disassembly view of the fuse device.

[0014] In the diagram: 1. Wok; 2. Temperature sensor; 31. Fuse; 32. Limiting strip; 4. Support plate; 41. Base plate; 42. Positioning plate; 5. Long strip plate; 51. High plate; 52. Low plate; 6. Conductive slip ring; 7. Base; 8. Rotating shaft. Detailed Implementation

[0015] like Figure 1 , Figure 2 and Figure 3 As shown, the temperature measuring component of this utility model is applied in an intelligent cooking machine. It includes a temperature sensor 2 that performs contact temperature measurement on the outer wall of the wok 1 (hereinafter referred to as the wok wall) and a fuse device spaced apart from the wok wall. The temperature of the wok wall is transferred to the fuse element 31 of the fuse device through thermal radiation. The function of the fuse element 31 is that when the temperature sensor 2 malfunctions and the temperature of the outer wall of the wok 1 reaches the limit temperature, the fuse element 31 can immediately send a signal to the main control circuit of the cooking machine, so that the main control circuit disconnects the power supply circuit of the heating device of the wok 1 that provides heat to the wok 1, thereby effectively preventing the accident of overheating and fire in the wok.

[0016] The purpose of leaving a gap (i.e., non-contact) between the fusible element 31 and the pot wall in this utility model is:

[0017] The preferred extreme temperature of this invention is 250°C, which is close to the ignition point of organic matter such as oil and food in the pot. When using a non-contact installation method, a low-temperature fuse 31 with a rated melting temperature lower than this extreme temperature can be selected to equivalently detect the high temperature of the pot wall. Furthermore, low-temperature fuses with different rated melting temperatures can be flexibly selected by adjusting the size of the gap. This type of fuse has the advantages of mature manufacturing process, complete product certification, low cost, and stable use. Since the fuse 31 will experience normal melting if it is in an environment close to its rated melting temperature (called the protection temperature) for a long time, the non-contact installation method can ensure that the fuse 31 is kept below its protection temperature even when the temperature sensor 2 is working normally, thus avoiding the phenomenon of normal melting.

[0018] If a contact installation method is adopted, where the fuse 31 is attached to the pot wall, a fuse 31 with a rated fusing temperature close to or equal to the limit temperature must be selected. This is to avoid the fuse 31 also melting (abnormal melting) when the temperature sensor 2 is working normally, thus affecting the normal cooking process of the wok 1. However, commercially available fuses 31 of this type are high-temperature fuses, and their product certification is not yet perfect, so their safety performance cannot be guaranteed. Furthermore, the fusible material constituting the fuse 31 or the insulating material encapsulating it is unstable at temperatures exceeding 250°C, which may also lead to the aforementioned abnormal melting. In addition, when the wok 1 of this invention is dry-heated, there may be a temperature overshoot exceeding 250°C, which may also lead to the abnormal melting of the high-temperature fuse. Moreover, because the fuse is in direct contact with the pot wall, it is in an environment close to its rated fusing temperature for a long time, which may also lead to the aforementioned normal melting, resulting in unstable use.

[0019] The following is a detailed description of the solution of this utility model:

[0020] 1. Installation method of temperature sensor 2

[0021] Each temperature sensor 2 is fixedly mounted on a corresponding elastic strip plate 5. This strip plate 5 is separate from the wok 1, allowing for easy disassembly and assembly of the wok 1. The strip plate 5 is located outside the wok 1, with its bottom end fixed to a base 7 located below the wok 1. Its top end extends upwards along the outer wall of the wok 1. Preferably, there are multiple strip plates 5, spaced apart along the circumference of the base 7. The temperature sensor 2 is located on the inner side of the top end of the corresponding strip plate 5 (within a certain range). Figure 1 The plane of the paper is the reference direction, the direction pointing towards the axis of the wok 1 is the inside, and the direction away from the axis of the wok 1 is the outside (the same applies below). The temperature sensor 2's temperature probe is tightly attached to the outer wall of the wok 1 under the elastic force of the long strip plate 5. The lead wire of the temperature sensor 2 is led out downward along the inner side of the long strip plate 5 and electrically connected to the conductive slip ring 6 set under the wok 1.

[0022] The base 7 is coaxial with the wok 1 and can be detachably installed. The bottom of the base 7 is also fixed with a rotating shaft 8 with a hollow channel. The rotating shaft 8 is connected to a motor for driving the wok 1 to rotate around the axis of the wok 1. The conductive slip ring 6 is installed in the hollow channel. A through hole is provided at the upper end of the rotating shaft 8 so that the lead wire and the signal line of the fuse 31 can pass through the through hole into the hollow channel and connect with the conductive slip ring 6.

[0023] The pot heating device is preferably an electromagnetic heating coil (not shown in the figure), which is preferably wound on a hollow, cylindrical bracket (not shown in the figure). The bracket is coaxial with the wok 1 and houses the wok 1 in its cavity. A protective shell (not shown in the figure) is provided outside the bracket. The protective shell can house the bracket and form a relatively sealed cavity space between the bracket and the pot wall. All the long strips 5 and the aforementioned fuse are placed in this cavity space. This cavity space can effectively block the external airflow, thereby preventing the external airflow from affecting the heat energy radiated from the pot wall to the fuse 31, and ensuring the accuracy of the temperature measurement of the fuse 31.

[0024] 2. Fuse device

[0025] The fuse device is at least one set, and each set includes a fuse element 31 and a support plate 4.

[0026] 1) Support plate 4

[0027] The support plate 4 provides support and mounting positioning for the fuse 31. It is divided into a base plate 41 and a positioning plate 42. The base plate 41 and the positioning plate 42 are preferably integrally formed and both are made of non-magnetic materials, preferably copper.

[0028] The base plate 41 is used to fix and connect with the long strip plate 5, and the positioning plate 42 is placed on the side of the long strip plate 5 and used to install the fuse 31.

[0029] The substrate 41 is preferably a rectangular flat plate. To facilitate the installation of the substrate 41, the substrate 41 is set on the upper section of the high plate 51 in the long strip 5 (the high plate 51 will be described in the following section "3, Long strip 5"). The inner side of the substrate 41 can be attached to the back side of the upper section and fixedly connected therebetween.

[0030] The positioning plate 42 is preferably a rectangular flat plate, located on the left side of the base plate 41 (left refers to the direction pointing to the left when facing the inner side of the long strip plate 5, and the direction pointing to the right is right, the same below) and in the same vertical plane as the base plate 41. The right side of the positioning plate 42 is connected to the left side of the base plate 41. The positioning plate 42 is partially or entirely placed outside the left edge of the high plate 51. The fuse 31 is installed on the inner side of the positioning plate 42. The gap is left between the fuse 31 and the pot wall. The upper end of the fuse 31 is provided with a rivet hole. It is preferably connected to the positioning plate 42 by a rivet. The signal line of the fuse 31 is led out downward along the length direction of the high plate 51 and electrically connected to the conductive slip ring 6.

[0031] Preferably, an inwardly extending cylindrical limiting strip 32 is provided on the lower side of the positioning plate 42. The limiting strip 32 abuts against the bottom of the fuse 31 and provides support, thereby improving the installation stability of the fuse 31.

[0032] 2) Fuse 31

[0033] The wok 1 of this invention has a set maximum working temperature when cooking food. The temperature sensor 2 can collect the temperature of the wok wall in real time so that the main control circuit can control the heating temperature of the wok 1 below the maximum working temperature.

[0034] The gap between the fuse 31 and the outer wall of the wok 1 is determined through calculation and extensive testing. This gap refers to the distance at which the heat radiated from the wok wall to the fuse 31 of a certain specification can melt the fuse 31 during the temperature rise period corresponding to the highest working temperature and continuous temperature rise of the outer wall of the wok 1. The smaller the distance, the shorter the response time of the fuse 31. The size of the distance can be adjusted as needed.

[0035] The fuse element 31 of this utility model is preferably a low-temperature fuse element 31 with a rated fusing temperature of 218°C, and the gap is preferably between 3mm and 6mm, and most preferably 4mm.

[0036] The size of the gap can be adjusted by modifying the structure of the substrate 41 and the positioning plate 42. For example, if it is necessary to increase the gap between the fuse 31 and the pot wall based on the connection method of the substrate 41 and the positioning plate 42, the left side of the substrate 41 can be bent outward to form a folded plate perpendicular to the substrate 41. The right side of the positioning plate 42 can be connected to the outer edge of the bend. The width of the folded plate (the distance from the outer edge to the inner edge) is the increased gap size. Similarly, the left side of the substrate 41 can be bent inward to form a folded edge and placed outside the high plate 51. The right side of the positioning plate 42 can be connected to the inner edge of the folded edge to reduce the gap. Alternatively, the thickness of the substrate 41 can be increased to achieve the purpose of increasing the gap.

[0037] The present invention preferably has two sets of fuse devices, and the fuse elements 31 in the two sets are spaced apart in the circumferential direction of the wok 1. Multiple fuses are provided to prevent local overheating and fire inside the wok.

[0038] 3. Long strip board 5

[0039] The vertical heights of all the long strips 5 are not exactly the same, so that the temperature sensors 2 set on the long strips 5 at different heights can collect the pot wall temperature data at the corresponding different height positions, so that the main control circuit can accurately control the temperature.

[0040] The wok 1 is preferably a cylindrical structure with an open top and an inner cavity. The upper outer contour is cylindrical, meaning the vertical cross-section is a straight line, while the lower outer contour is hemispherical, meaning the vertical cross-section is an arc. This inner cavity is used to hold and cook the ingredients fed by the feeding device of the cooking machine.

[0041] The shape of the elongated plate 5 is preferably adapted to the shape of the corresponding pot wall area. That is, when the top part of the elongated plate 5 is located in the lower area of ​​the wok 1 (this elongated plate 5 is called the low plate 52), the shape of the low plate 52 is an arc shape adapted to the shape of the lower cross section of the wok 1; when the top part of the elongated plate 5 is located in the middle and upper part of the wok 1 (this elongated plate 5 is called the high plate 51), the high plate 51 is divided into upper and lower sections. The lower section is the part opposite to the lower part of the wok 1, that is, the shape of the lower section is the arc shape, and the upper section is the part opposite to the middle and upper part of the wok 1, that is, the upper section is a straight plate adapted to the shape of the middle and upper cross section of the wok 1, so that when the inner plane of the encapsulation shell of the temperature measuring probe is attached to the pot wall, there is the largest possible contact area, that is, "line contact", so that the temperature measuring probe can more accurately collect the pot wall temperature.

[0042] Driven by the motor, the wok causes the long plate 5, carrying the temperature sensor 2, the lead wire of the temperature sensor 2, the fuse 31 and its signal line, to rotate synchronously with the wok 1 around the axis of the wok 1. This avoids wear, deformation, loosening and poor adhesion between the temperature probe and the wok wall caused by relative rotation, and ensures that the temperature probe is always in close contact with the wok wall.

Claims

1. A temperature measuring component for measuring the temperature of the outer wall of a wok in a stir-fry machine, comprising a long strip plate disposed outside the wok, a temperature sensor fixed to the long strip plate, wherein the temperature sensor's probe is in close contact with the outer wall of the wok, characterized in that, The fuse device is fixed on the long strip plate and can rotate synchronously with the frying pan. The fuse device includes a fuse body which disconnects the power supply circuit of the frying pan heating device when the temperature of the outer wall of the frying pan reaches a limit temperature value. The fuse body detects the temperature of the outer wall of the frying pan by heat radiation.

2. The temperature measuring assembly for measuring the temperature of the outer wall of the wok of the wok cooker according to claim 1, characterized in that, The fuse device includes a support plate which is divided into a base plate and a positioning plate. The base plate is fixed on the back side of the long strip plate. The positioning plate is connected to one side of the base plate and placed beside the arc-shaped plate. The fuse body is fixedly installed on the inner side of the positioning plate and faces the outer wall of the frying pan. The signal line of the fuse body is led out from top to bottom and electrically connected to the conductive slip ring located below the frying pan.

3. The temperature measuring assembly for measuring the temperature of the outer wall of the wok of the stir-fry cooker according to claim 2, characterized in that, A limiting strip which extends inward and is placed at the bottom of the fuse body is arranged on the bottom side of the positioning plate to constrain the downward displacement of the fuse body.

4. The temperature measuring assembly for measuring the temperature of the outer wall of the wok of the stir-fry cooker according to claim 3, characterized in that, The fuse body is a low-temperature fuse body.

5. The temperature measuring assembly for measuring the temperature of the outer wall of the wok of the stir-fry cooker according to claim 4, characterized in that, The gap between the fuse body and the outer wall of the frying pan is in the range of 3mm-6mm.

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