Weight detection mechanism of electric flame stove

Abstract

The invention relates to the technical field of electric flame stoves, in particular to a weight detection mechanism of an electric flame stove, which comprises an electric flame stove shell, a panel, a pot rack, an annular bearing plate, a plurality of supporting columns, an annular heat insulation shell, an annular stress plate, a plurality of supporting springs and a distance measuring sensor. The annular stress plate is forced to compress the supporting spring at the bottom, meanwhile, the deformation causes the reflection target surface fixed to the annular stress plate to generate vertical displacement, the distance measuring sensor is matched with the reflection target surface, the displacement change amount of the annular stress plate is accurately measured, and therefore the stiffness coefficient of the supporting spring and the displacement change amount of the annular stress plate are measured. By the adoption of the structure, due to the fact that the distance measuring sensor and the reflection target face are thoroughly away from the high temperature and oil smoke of the working cavity of the cooker, the reliability and the measuring precision of the sensor are greatly improved, and the service life of the sensor is greatly prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric flame hobs, and particularly relates to a weight detection mechanism of an electric flame hob. BACKGROUND

[0002] An electric flame hob (also known as a plasma hob) is a new type of kitchen electrical equipment that generates plasma flame by exciting air with high-frequency high-voltage current. It does not need a gas source of a traditional gas hob, nor does it need special cookware of an induction cooker. It can achieve efficient heating through ionized air, and has the advantages of safety, environmental protection, fast heating speed, etc. In recent years, it has attracted more and more attention.

[0003] In order to ensure cooking safety and realize intelligent control (such as dry burning protection, weight sensing timing, automatic fire turning off, etc.), the electric flame hob usually needs to integrate a weight detection function to detect the mass of food placed in the pot in real time. When the food is cooked by the electric flame hob, the user can determine how much water needs to be added to the pot according to the size of the mass (called weight in daily production) of the food. The existing electric flame hob weight detection mechanism usually adopts a scheme of setting a pressure sensor below a load-bearing panel that supports the pot.

[0004] However, in actual use, the existing electric flame hob weight detection mechanism has the problem that the sensitivity and service life of the sensor are easily affected by the complex environment such as high temperature and oil smoke in the hob body, because the pressure sensor is usually directly or through a simple force transmission structure installed below the load-bearing panel. SUMMARY

[0005] The present application relates to the technical field of electric flame hobs, and particularly relates to a weight detection mechanism of an electric flame hob.

[0006] To achieve the above objectives, the present invention provides a weight detection mechanism for an electric flame stove. The weight detection mechanism includes an electric flame stove outer shell, a panel, a pot rack, an annular support plate, multiple support columns, an annular heat insulation shell, an annular force-bearing plate, multiple support springs, and a distance sensor. The panel is located at the top of the electric flame stove outer shell, and the pot rack is placed in the burner area of ​​the panel. The annular heat insulation shell is installed inside the electric flame stove outer shell and is located around the nozzle module of the electric flame stove. Multiple support springs are evenly installed at the bottom of the annular heat insulation shell. An annular force-bearing plate is installed between the top ends of multiple supporting springs. Multiple supporting columns are evenly arranged on the upper surface of the annular force-bearing plate. The end of each supporting column away from the annular force-bearing plate passes through the top end of the annular heat insulation shell and the panel in sequence. An annular bearing plate is arranged between the top ends of multiple supporting columns. The pot rack is placed on the upper surface of the annular bearing plate. A reflective target surface is also embedded on the upper surface of the annular force-bearing plate. The ranging sensor is installed at the top end inside the annular heat insulation shell, and the ranging sensor corresponds to the reflective target surface.

[0007] Each of the supporting columns is provided with a first graphite copper sleeve at the penetration point between the top of the annular heat insulation shell and the supporting column, and a second graphite copper sleeve is provided at the penetration point between the supporting column and the panel.

[0008] The specific formula for detecting the mass of food placed inside the pot based on the measured value of the ranging sensor and the stiffness coefficient of the supporting spring is as follows:

[0009]

[0010] In the formula, m food The mass of the food inside the pot is represented by k, and the spring constant of the supporting spring is represented by D. empty D represents the initial distance measured by the ranging sensor when the empty cookware is placed. loaded This represents the real-time distance measured by the ranging sensor after the food is placed in the container, and g represents the gravitational acceleration.

[0011] Each of the supporting springs is provided with a first fixing block and a second fixing block at its upper and lower ends, respectively. The first fixing block is connected to the bottom of the annular force-bearing plate, and the second fixing block is connected to the inner bottom of the annular heat insulation shell.

[0012] The outer wall of the annular force-bearing plate is uniformly provided with multiple limiting protrusions, and the inner wall of the annular heat insulation shell is uniformly provided with multiple limiting grooves. Each limiting protrusion slides in the corresponding limiting groove.

[0013] The two sides of each limiting sliding groove are embedded with a lubricating strip made of self-lubricating material, and the material of the lubricating strip is one of polytetrafluoroethylene, polyether ether ketone or polyimide.

[0014] The weight detection mechanism of the electric flame stove further comprises a protective ring, and the stove head of the panel is further provided with the protective ring, which is arranged outside the annular bearing plate.

[0015] The protective ring comprises a fixed ring and an outer ring, the bottom of the fixed ring is provided with a sealing gasket, and the top end of the fixed ring is provided with the outer ring, which is arranged outside the annular bearing plate.

[0016] The weight detection mechanism of the electric flame stove comprises an electric flame stove shell, a panel, a pot rack, an annular bearing plate, a plurality of support columns, an annular heat insulation shell, an annular stress plate, a plurality of support springs and a distance measuring sensor. When food is added to the inside of the pot, the weight is transmitted downward through the support columns, forcing the annular stress plate to compress the support springs at the bottom, and the deformation causes the reflective target surface fixed on the annular stress plate to produce vertical displacement, and the distance measuring sensor installed at the top of the closed annular heat insulation shell continuously emits detection signals to the reflective target surface. The displacement change of the annular stress plate is accurately measured by receiving the reflected signal, so that the weight of the added food is completed by the stiffness coefficient of the support spring and the displacement change of the annular stress plate according to Hooke's law. The above structure is adopted. Since the distance measuring sensor and the reflective target surface are sealed in the inside of the annular heat insulation shell, they are completely away from the high temperature and oil smoke of the stove working cavity, greatly improving the reliability, measurement accuracy and service life of the sensor. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0018] Figure 1 is a structural schematic diagram of the weight detection mechanism of the electric flame stove provided by the present application.

[0019] Figure 2 is a structural schematic diagram of the weight detection mechanism of the electric flame stove provided by the present application. Figure 1 is an enlarged view of the local structure at A of the weight detection mechanism of the electric flame stove.

[0020] Figure 3 is a structural schematic diagram of the inside of the electric flame stove shell provided by the present application.

[0021] Figure 4 is provided by the present application Figure 3 is a partial structure enlarged view of B of the

[0022] Figure 5 is a schematic view of the internal structure of the annular heat insulation shell provided by the present application.

[0023] Figure 6 is provided by the present application Figure 5 is a schematic view of another perspective of the

[0024] 101 - electric flame stove shell, 102 - panel, 103 - pot rack, 104 - annular bearing plate, 105 - support column, 106 - annular heat insulation shell, 107 - annular stress plate, 108 - support spring, 109 - distance measuring sensor, 110 - reflecting target surface, 111 - first graphite copper sleeve, 112 - second graphite copper sleeve, 113 - first fixed block, 114 - second fixed block, 115 - limiting protrusion, 116 - limiting sliding groove, 117 - lubricating strip, 118 - fixed ring, 119 - outer ring, 120 - sealing gasket, 121 - fixed bolt. DETAILED DESCRIPTION

[0025] Embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0026] Please refer to Figures 1 to 6The application provides a weight detection mechanism of an electric flame cooker, which comprises an electric flame cooker shell 101, a panel 102, a pot rack 103, an annular bearing plate 104, a plurality of support columns 105, an annular heat insulation shell 106, an annular stress plate 107, a plurality of support springs 108 and a distance measuring sensor 109, the top end of the electric flame cooker shell 101 is provided with the panel 102, the burner head area of the panel 102 is placed with the pot rack 103, the inside of the electric flame cooker shell 101 is installed with the annular heat insulation shell 106, the annular heat insulation shell 106 is arranged at the periphery of the nozzle module of the electric flame cooker, a plurality of support springs 108 are uniformly installed on the inner bottom of the annular heat insulation shell 106, the top end of the plurality of support springs 108 is installed with the annular stress plate 107, the upper surface of the annular stress plate 107 is uniformly provided with a plurality of support columns 105, the end of each support column 105 away from the annular stress plate 107 is sequentially penetrated through the top end of the annular heat insulation shell 106 and the panel 102, the top end of the plurality of support columns 105 is provided with the annular bearing plate 104, the pot rack 103 is placed to the upper surface of the annular bearing plate 104, the upper surface of the annular stress plate 107 is also embedded with a reflective target surface 110, the top end of the inside of the annular heat insulation shell 106 is installed with the distance measuring sensor 109, and the distance measuring sensor 109 corresponds to the reflective target surface 110.

[0027] In the embodiment, when food is added to the inside of the pot, the weight of the food is transmitted downward through the support columns 105, forcing the annular stress plate 107 to compress the support springs 108 at the bottom, and the deformation causes the reflective target surface 110 fixed on the annular stress plate 107 to produce vertical displacement, and the distance measuring sensor 109 installed at the top of the closed annular heat insulation shell 106 continuously emits detection signals to the reflective target surface 110, and the displacement change of the annular stress plate 107 is accurately measured by receiving the reflected signals, so that the weight of the added food is measured by the stiffness coefficient of the support spring 108 and the displacement change of the annular stress plate 107 according to Hooke's law. By using the above structure, since the distance measuring sensor 109 and the reflective target surface 110 are sealed in the inside of the annular heat insulation shell 106, they are completely away from the high temperature and oil smoke of the cooker working cavity, which greatly improves the reliability, measurement accuracy and service life of the sensor.

[0028] Further, the penetration of each support column 105 and the top end of the annular heat insulation shell 106 is provided with a first graphite copper sleeve 111, and the penetration of each support column 105 and the panel 102 is provided with a second graphite copper sleeve 112.

[0029] In this embodiment, a first graphite copper sleeve 111 and a second graphite copper sleeve 112 are respectively provided at the penetration points of each support column 105 through the annular heat insulation shell 106 and the panel 102. By utilizing the solid lubrication properties of graphite, the frictional resistance and wear of the support column 105 during reciprocating motion in a high-temperature environment are significantly reduced. This ensures both the sensitivity and accuracy of weight transmission and avoids the need for regular lubrication, greatly improving the reliability and lifespan of the mechanism under long-term high-temperature conditions.

[0030] Furthermore, the specific formula for detecting the mass of food placed inside the cookware based on the measurement value of the ranging sensor 109 and the spring coefficient of the supporting spring 108 is as follows:

[0031]

[0032] In the formula, m food The mass of the food inside the pot is represented by k, and the spring constant of the supporting spring 108 is represented by D. empty D represents the initial distance measured by the distance sensor 109 when the empty pot is placed. loaded This represents the real-time distance measured by the ranging sensor 109 after food is placed in the container, where g represents the gravitational acceleration.

[0033] Furthermore, each of the support springs 108 is provided with a first fixing block 113 and a second fixing block 114 at its upper and lower ends, respectively. The first fixing block 113 is connected to the bottom of the annular force plate 107, and the second fixing block 114 is connected to the inner bottom of the annular heat insulation shell 106.

[0034] In this embodiment, the installation of the support spring 108 is facilitated by the arrangement of the first fixing block 113 and the second fixing block 114.

[0035] Furthermore, a plurality of limiting protrusions 115 are uniformly arranged on the outer side wall of the annular force plate 107, and a plurality of limiting grooves 116 are uniformly arranged on the inner wall of the annular heat insulation shell 106, and each of the limiting protrusions 115 slides in the corresponding limiting groove 116.

[0036] In the embodiment, the limiting protrusions 115 are arranged on the outer wall of the ring-shaped stress plate 107, and the limiting sliding grooves 116 are correspondingly arranged on the inner wall of the ring-shaped heat insulation shell 106, so as to form an axial guiding structure, which ensures that the ring-shaped stress plate 107 moves smoothly in the vertical direction during the compression and rebound of the supporting spring 108, effectively prevents the horizontal deviation, shaking or rotation, and ensures that all the supporting columns 105 are stressed uniformly and move synchronously, thereby significantly improving the accuracy and reliability of the weight detection, and avoiding the mechanism jamming or wear caused by the lateral force.

[0037] Further, the two sides of each limiting sliding groove 116 are embedded with a lubricating strip 117 made of self-lubricating material, and the material of the lubricating strip 117 is one of polytetrafluoroethylene, polyether ether ketone or polyimide.

[0038] In the embodiment, the lubricating strips 117 made of polytetrafluoroethylene, polyether ether ketone or polyimide are embedded on the two sides of the limiting sliding groove 116, so as to form a low-friction guiding interface. These high-performance engineering plastics significantly reduce the friction resistance and wear of the limiting protrusions 115 when sliding in the limiting sliding groove 116, completely avoid the failure or oil fume adsorption of traditional lubricating oil at high temperature, and ensure that the ring-shaped stress plate 107 can still move smoothly and stably in the vertical direction under long-term high-temperature working conditions, thereby further improving the accuracy and durability of the weight detection mechanism.

[0039] Further, the weight detection mechanism of the electric flame stove further comprises a protective ring, and the flame head of the panel 102 is also provided with the protective ring, and the protective ring is arranged outside the ring-shaped bearing plate 104.

[0040] In the embodiment, the protective ring is additionally arranged outside the ring-shaped bearing plate 104, so as to form an effective physical barrier. The protective ring can block the pollutants such as spilled soup and oil stains in the cooking process from directly penetrating into the gap between the ring-shaped bearing plate 104 and the panel 102 below, prevent the liquid or impurities from invading the inside of the mechanism to cause the supporting column 105 to jam, corrode or affect the working environment of the sensor, thereby significantly improving the environmental tolerance and long-term working reliability of the weight detection mechanism, and reducing the measurement error or failure risk caused by pollution.

[0041] Further, the protective ring comprises a fixed ring 118 and an outer ring 119, the bottom of the fixed ring 118 is provided with a sealing gasket 120, the top end of the fixed ring 118 is provided with the outer ring 119, and the outer ring 119 is arranged outside the ring-shaped bearing plate 104.

[0042] In the embodiment, the fixed ring 118 and the outer ring 119 are combined to form the protective ring structure, and the sealing pad 120 is additionally arranged at the bottom of the fixed ring 118, so as to achieve the multiple protection effects. The design makes the fixed ring 118 form a tight seal with the sealing pad 120 and the cooktop of the panel 102, so as to completely block the possibility of liquid seepage from the interface gap. Meanwhile, the outer ring 119 forms a high retaining wall at the periphery of the ring-shaped bearing plate 104, so as to effectively intercept the splashed oil and spilled soup, thereby comprehensively improving the protection level of the core weighing mechanism in terms of sealing and splashing, and ensuring that the weighing mechanism can maintain stable and reliable measurement accuracy in a wet and greasy environment for a long time.

[0043] Further, the bottom of the pot rack 103 is fixed to the ring-shaped bearing plate 104 by a plurality of fixing bolts 121.

[0044] In the embodiment, the bottom of the pot rack 103 is rigidly connected to the ring-shaped bearing plate 104 by the fixing bolts 121, so as to realize the structural integration of the pot rack 103 and the weighing mechanism. The design effectively avoids the relative displacement or sliding between the pot rack 103 and the bearing plate due to the movement of the pot or external force collision during cooking, ensures the directness and stability of the weight transmission path, thereby eliminating the weighing error caused by the friction of the contact surface or the change of the position, and significantly improving the accuracy and reliability of the detection result.

[0045] The above disclosure is only a preferred embodiment of the present application, and of course cannot limit the scope of the present application. Those skilled in the art can understand that the above-mentioned embodiment can be implemented in whole or in part, and equivalent changes made according to the claims of the present application still fall within the scope of the present application.

Claims

1. A weight detection mechanism for an electric flame stove, characterized in that, The device includes an electric flame stove outer shell, a panel, a pot rack, an annular support plate, multiple support columns, an annular heat insulation shell, an annular force-bearing plate, multiple support springs, and a distance sensor. The panel is located at the top of the electric flame stove outer shell, and the pot rack is placed in the burner area of ​​the panel. The annular heat insulation shell is installed inside the electric flame stove outer shell and is located around the nozzle module of the electric flame stove. Multiple support springs are evenly installed at the bottom of the annular heat insulation shell, and the annular force-bearing plate is installed between the tops of the multiple support springs. Multiple support columns are evenly arranged on the upper surface of the annular force-bearing plate, and the end of each support column away from the annular force-bearing plate passes through the top of the annular heat insulation shell and the panel in sequence. The annular support plate is located between the tops of the multiple support columns, and the pot rack is placed on the upper surface of the annular support plate. A reflective target is also embedded on the upper surface of the annular force-bearing plate. The distance sensor is installed at the top of the interior of the annular heat insulation shell, and the distance sensor corresponds to the reflective target.

2. The weight detection mechanism for the electric flame stove as described in claim 1, characterized in that, A first graphite copper sleeve is provided at the penetration point between each of the support columns and the top of the annular heat insulation shell, and a second graphite copper sleeve is provided at the penetration point between each of the support columns and the panel.

3. The weight detection mechanism for the electric flame stove as described in claim 1, characterized in that, The specific formula for detecting the mass of food placed inside the pot based on the measurement value of the ranging sensor and the stiffness coefficient of the supporting spring is as follows: In the formula, m food The mass of the food inside the pot is represented by k, and the spring constant of the supporting spring is represented by D. empty D represents the initial distance measured by the ranging sensor when an empty pot is placed. loaded This represents the real-time distance measured by the ranging sensor after the food is placed in the container, and g represents the acceleration due to gravity.

4. The weight detection mechanism for the electric flame stove as described in claim 1, characterized in that, Each of the support springs is provided with a first fixing block and a second fixing block at its upper and lower ends, respectively. The first fixing block is connected to the bottom of the annular force-bearing plate, and the second fixing block is connected to the inner bottom of the annular heat insulation shell.

5. The weight detection mechanism for the electric flame stove as described in claim 1, characterized in that, Multiple limiting protrusions are evenly arranged on the outer wall of the annular force-bearing plate, and multiple limiting grooves are evenly arranged on the inner wall of the annular heat insulation shell. Each limiting protrusion slides in the corresponding limiting groove.

6. The weight detection mechanism for the electric flame stove as described in claim 5, characterized in that, Each of the limiting grooves is fitted with a lubricating strip made of a self-lubricating material on both sides. The material of the lubricating strip is specifically one of polytetrafluoroethylene, polyetheretherketone, or polyimide.

7. The weight detection mechanism for the electric flame stove as described in claim 1, characterized in that, The weight detection mechanism of the electric flame stove also includes a protective ring, and the protective ring is also provided at the stove head of the panel. The protective ring is located outside the annular support plate.

8. The weight detection mechanism for the electric flame stove as described in claim 7, characterized in that, The protective ring includes a fixed ring and an outer ring. The bottom of the fixed ring is provided with a sealing gasket, and the top of the fixed ring is provided with the outer ring. The outer ring is located outside the annular support plate.

Images