An intelligent temperature-controlled pot

Abstract

The present invention relates to the technical field of automatic temperature-controlled cooking, and particularly relates to an intelligent temperature-controlled pot; a bottom shell is provided on one side of the pot body for heating, and a side wall and a heat insulation layer located at the bottom of the pot are provided on the cooking side; one or more heat insulation units that can expand at high temperatures are dispersedly arranged inside the heat insulation layer, and after the heat insulation units expand, a heat insulation layer can be formed to reduce heat transfer. The heat insulation unit can form a heat insulation layer after expansion to reduce heat transfer; heat insulation material particles and a first blowing agent; the heat insulation unit remains in a relaxed state at normal temperature and relatively low temperature; after reaching the boiling point of the first blowing agent, the heat insulation unit expands and gradually compacts within the limited space in the heat insulation layer, the gaps between multiple heat insulation units decrease or disappear, the heat that can be transferred decreases, thereby achieving heat insulation, and further achieving the function of intelligent temperature control.

Description

Technical Field

[0001] The present invention relates to the technical field of automatic temperature-controlled cooking, and particularly relates to an intelligent temperature-controlled pot. Background Art

[0002] In the technical field of automatic temperature-controlled cooking, to achieve temperature control of cooking utensils, a thermal sensor is usually provided in the cooking utensil, and the control is realized through the linkage of the thermal sensor and the cooking stove: the thermal sensor detects the temperature of the cooking utensil, and controls the cooking stove to heat when the temperature is lower than the preset value; when the thermal sensor detects that the temperature of the cooking utensil is higher than the upper limit, the cooking stove stops heating. The inventor of the present invention has found that the prior art has the following defects: 1. It is necessary to have cooking utensils and cooking stoves that are linked and matched by the control system, which is difficult to match with the existing cooking stoves in the market, so it is difficult to be widely promoted in the existing cooking stoves; 2. At the same time, due to the unstable characteristics of the electronic components of the electronic control system at high temperatures, even if the control system realizes the linkage of the functional cooking stove and cooking utensil, there is still a risk of out-of-control overheating. In addition, fires caused by overheating of cooking utensils occur frequently, and it is extremely urgent to further improve the safety performance of cooking utensils; therefore, there is an urgent need in the market for a safer cooking utensil that can be more easily matched with the cooking stoves in the market and can still effectively control the temperature when the cooking stove overheats. Summary of the Invention

[0003] To solve at least one of the above technical problems, the present invention provides an intelligent temperature-controlled pot. By optimizing the design of the bottom layer structure of the pot and cooperating with high-temperature resistant heat insulation materials, the cooking temperature is always lower than the set value (a certain temperature far lower than the outer surface temperature of the heating area of the cooking stove or cooking utensil, such as 200°C) when the heating is stable, thereby realizing stable temperature control. It can not only ensure the safety of the cooking process and prevent potential fire hazards caused by too high temperature due to human negligence or mechanical failures; but also be well compatible with existing cooking stoves such as gas stoves and induction cookers, avoiding the additional costs caused by the need to upgrade the control or replace the entire set of cooking utensils and cooking stoves in the prior art; at the same time, by adjusting the internal structure design of the temperature-controlled pot, the cooking temperature can be flexibly controlled, thereby meeting various different cooking methods and avoiding the deterioration of food taste or nutrient loss caused by uncontrollable temperature. The general power of a household gas stove is 3.8kw - 4.0kw, and the thermal efficiency is 50 - 60%; the maximum power of a household induction cooker is 2.0kw, and the thermal efficiency is 70 - 80%. The actual power of both types of stoves is about 2kw, and the heat generated by the induction cooker is more concentrated, which poses higher requirements for temperature control. In order to unify the standards for easy inspection, the present invention is based on the design of an intelligent temperature-controlled pot using a 2kw induction cooker as the experimental stove, which can meet the application in most cases.

[0004] In view of this, the present invention provides an intelligent temperature-controlled pot. The main body of the intelligent temperature-controlled pot is provided with a bottom shell on the heating side, a side wall on the cooking side, and a heat insulation layer at the bottom of the pot;

[0005] One or more heat-insulating units are dispersedly arranged inside the heat-insulating layer, and the heat-insulating units can expand at high temperatures. After expansion, the heat-insulating units can form a heat-insulating layer to reduce heat transfer.

[0006] The heat-insulating unit includes a first silicone rubber shell, heat-insulating material particles, and a first expander; the mass ratio of the first silicone rubber shell, the heat-insulating material particles, and the first expander is 1: 0.5-10: 0.05-0.2.

[0007] The heat-insulating material particles are one or more of hollow glass microspheres and hollow ceramic microspheres; and / or, the heat-insulating material particles are 5-50μm, and the true density is 0.2-1.0g / cm 3 。

[0008] The heat-insulating layer is provided with a first support plate slidably connected to the side wall; one side of the heat-insulating unit is fixedly connected to the first support plate; an expansion unit that can expand when heated and promote the first support plate to squeeze the heat-insulating unit is provided between the first support plate and the bottom of the heat-insulating layer.

[0009] The expansion unit includes a second silicone rubber shell and a second expander; the mass ratio of the second silicone rubber shell and the second expander is 1: 0.5-2.

[0010] The second silicone rubber shell is further provided with stainless steel reinforcing ribs; the first expander and the second expander are any one of water, ethylene glycol, and glycerol.

[0011] A second support plate slidably connected to the side wall is further provided between the first support plate and the expansion unit; the first support plate is provided with a first through hole for transferring heat from bottom to top, the second support plate is provided with a second through hole for transferring heat from bottom to top, and the first through hole and the second through hole are arranged in a dislocation manner in the heat transfer direction.

[0012] The heat-insulating layer is provided with a third support plate for fixing the expansion unit and slidably connected to the side wall; a fourth support plate fixedly connected to the side wall is provided between the third support plate and the bottom of the heat-insulating layer; the third support plate is provided with a third through hole for transferring heat from bottom to top.

[0013] A first cavity is provided between the fourth support plate and the bottom of the heat-insulating layer, and the bottom of the first cavity is filled with a first heat-conducting medium; the top of the heat-insulating layer is a lining layer, and heat is indirectly transferred between the lining layer and the first heat-conducting medium through a second heat-conducting medium.

[0014] The bottom shell is provided with a heating area and heat dissipation areas on both sides of the heating area; one side of the heating area is connected to the bottom of the heat insulation layer, the side of the heat insulation layer is connected to one side of the side wall heat insulation layer, and the other side of the side wall heat insulation layer is connected to the heat dissipation area; the top of the heat insulation layer and the free end surface of the side where the side wall heat insulation layer is connected to the heat insulation layer form the cooking chamber of the intelligent temperature control pot; the first heat conduction medium is molten salt; the second heat conduction medium is heat conduction oil. Advantageous Effects

[0015] To solve the defects that the temperature control in the prior art is unstable under long-term high temperature, there are safety risks and it is difficult to match with the existing cookers in the market, and the upgrade cost is high, the present invention adopts an improved technical solution and has the following characteristics:

[0016] The present invention adopts heat insulation units that can expand at high temperatures. After expansion, a heat insulation layer can be formed to reduce heat transfer; heat insulation material particles and a first expansion agent; the heat insulation units remain in a relaxed state at normal temperature and relatively low temperatures; after reaching the boiling point of the first expansion agent, the pressure inside the heat insulation units increases, and the elastic heat insulation units expand and are gradually compacted within the limited space of the heat insulation layer. The gaps between multiple heat insulation units decrease or disappear, and there is less channel space available for heat transfer. Therefore, the heat transferred to the top of the heat insulation layer is reduced, thereby achieving heat insulation, which helps to slow down the continuous rise of the temperature in the cooking area of the temperature control pot and even stop the temperature rise, and thus realizes the function of intelligent temperature control.

[0017] One side of the heat insulation unit of the present invention is fixedly connected to the first support plate; there is an expansion unit between the first support plate 303 and the bottom of the heat insulation layer, which can expand when heated and promote the first support plate to squeeze the heat insulation unit; when the temperature rises to the boiling point of the second expansion agent, the pressure inside the expansion unit increases, and then the second silicone rubber shell expands rapidly; then the expansion unit squeezes the second support plate, causing it to slide upward; then the second support plate slides to the contact part with the first support plate, resulting in the upward sliding of the first support plate, so that the first support plate squeezes the heat insulation unit, improving the defects of insufficient density and irregular arrangement of the heat insulation material particles. Description of the Drawings

[0018] Figure 1 Shows the overall structural view of the intelligent temperature control pot;

[0019] Figure 2 Shows the A-A' cross-sectional view of an embodiment of the intelligent temperature control pot;

[0020] Figure 3 Shows the schematic diagram of the change of the expansion unit when heated and expanded in an embodiment of the intelligent temperature control pot;

[0021] Figure 4Shows a schematic diagram of the changes in the second support plate and the third support plate of an embodiment of the intelligent temperature control pot;

[0022] Figure 5 Shows a schematic diagram of the changes in the second support plate and the first support plate of an embodiment of the intelligent temperature control pot;

[0023] Figure 6 Shows a schematic diagram of the changes in the heat insulation unit of an embodiment of the intelligent temperature control pot;

[0024] Figure 7 Shows a top view of the joint of the first support plate and the second support plate of an embodiment of the intelligent temperature control pot;

[0025] Figure 8 Shows a top view of the third support plate of an embodiment of the intelligent temperature control pot.

[0026] Bottom shell 1; side wall 2; heat insulation layer 3; lining layer 301; heat insulation unit 302; first support plate 303; second support plate 304; expansion unit 305; third support plate 306; fourth support plate 307; first through hole 3031; second through hole 3041; third through hole 3061. Detailed implementation manners

[0027] Now, the content of the present invention will be described with reference to several exemplary embodiments. It should be understood that these embodiments are described only to enable those of ordinary skill in the art to better understand and thus implement the content of the present invention, rather than implying any limitation to the scope of the present invention.

[0028] As used herein, the term "comprising" and its variants are to be construed as open-ended terms meaning "including but not limited to". The term "based on" is to be construed as "at least partially based on". The term "one embodiment" and "an embodiment" are to be construed as "at least one embodiment". The term "another embodiment" is to be construed as "at least one other embodiment".

[0029] The present invention discloses a detailed implementation manner of an intelligent temperature control pot. As Figure 1 shown, a bottom shell 1 is provided on the heating side, and a side wall 2 and a heat insulation layer 3 located at the bottom of the pot are provided on the cooking side;

[0030] As Figure 2 shown, one or more heat insulation units 302 that can expand at high temperatures are dispersedly arranged inside the heat insulation layer 3. After the heat insulation units 302 expand, they can form a heat insulation layer to reduce heat transfer.

[0031] The heat insulation unit 302 includes a first silicone rubber shell, heat insulation material particles, and a first expander; the heat insulation unit 302 remains in a relaxed state at normal temperature and relatively low temperature; after reaching the boiling point of the first expander, the pressure inside the heat insulation unit 302 increases, and the elastic heat insulation unit 302 expands and gradually compacts within the limited space in the heat insulation layer 3. The gaps between multiple heat insulation units 302 decrease or disappear, and there is less channel space available for heat transfer. Therefore, the amount of heat that can be transferred to the top of the heat insulation layer 3 is reduced, thereby achieving heat insulation, which helps to slow down the continuous rise of the temperature in the cooking area of the temperature-controlled pot and even stop the temperature rise, thus realizing the function of intelligent temperature control.

[0032] Preferably, for the first silicone rubber shell, the selection of silicone rubber can meet the long-term use of the heat insulation layer 3 at high temperature, and at the same time has good elasticity and airtightness; further, the selection of methyl vinyl silicone rubber and methyl phenyl vinyl silicone rubber can further improve airtightness and oil resistance, and at the same time can meet the long-term use in an environment above 250°C.

[0033] The thickness of the first silicone rubber shell is related to the designed expansion rate and pressure. The larger the designed expansion rate and the larger the designed pressure, the larger the selected first silicone rubber, which can be adjusted according to actual needs. At the same time, since the airtightness of silica gel is not as good as that of rubber, for the same expansion rate, a higher thickness is required for silica gel.

[0034] The more the number of heat insulation units 302, the smaller the corresponding volume. After the heat insulation units 302 expand, the connecting gaps are smaller, reducing the heat flow channels after expansion and improving the heat insulation effect; but at the same time, the more silicone rubber shell layers, the smaller the arrangement area of the heat insulation material particles, which instead leads to a decrease in the heat insulation effect.

[0035] Taking all factors into consideration, the thickness of the first silicone rubber shell of the heat insulation unit 302 is set to 0.5 - 2.5 mm, and the number is set to 2 - 10 pieces / dm 2 .

[0036] At the same time, the heat insulation material particles are one or more of hollow glass microspheres and hollow ceramic microspheres; the hollow structure contains air, which can effectively isolate the heat transfer. When in the heat insulation unit 302, it can spread out in the vertical heat flow channel to form an effective heat insulation layer; the effect of the heat insulation layer is related to both the particle size and the hollow volume of the heat insulation material particles. The smaller the particle size of the heat insulation material particles, the smaller the gap between the particles, and the better the blocking effect on the heat flow channel; micron-sized particles already have good heat insulation effects; but at the same time, considering cost and technical maturity, particles with a particle size of 5 - 50 μm and a true density of 0.2 - 1.0 g / cm 3 Heat insulation material particles.

[0037] Further preferably, in order to ensure good heat insulation effect and sufficient expansion rate, the mass ratio of the first silicone rubber shell, the heat insulation material particles and the first expander is set to 1: 0.5-10: 0.05-0.2. In the present invention, too few heat insulation material particles are not conducive to the exertion of heat insulation performance. In the case where the thickness and distribution density of the first silicone rubber shell have been limited, the mass ratio of the first silicone rubber shell to the heat insulation material particles is 1:10, which is already close to the loading limit of the first silicone rubber shell.

[0038] At the same time, the inventor found that in the above solution, when the heat insulation unit 302 expands, there are defects such as insufficient density of the heat insulation material particles and irregular arrangement; in order to further improve the heat insulation effect, as Figure 1 shown, the heat insulation layer 3 is provided with a first support plate 303 slidably connected to the side wall 2; one side of the heat insulation unit 302 is fixedly connected to the first support plate 303; a swelling unit 305 that can be heated and expanded and promote the first support plate 303 to press the heat insulation unit 302 is provided between the first support plate 303 and the bottom of the heat insulation layer 3; a second support plate 304 slidably connected to the side wall 2. The heat insulation material particles can remain relaxed at normal temperature or lower temperature. At the same time, the swelling unit 305 is provided with a second silicone rubber shell and a second expander; as Figure 3 shown, when the temperature rises to the boiling point of the second expander, the pressure in the swelling unit 305 increases, and the second silicone rubber shell expands rapidly; further, as Figure 4 shown, the swelling unit 305 presses the second support plate 304 to slide it upward; further, as Figure 5 shown, the second support plate 304 slides to the contact part with the first support plate 303, causing the first support plate 303 to slide upward, so that the first support plate 303 presses the heat insulation unit 302.

[0039] At the same time, a lining layer 301 is provided at the top of the heat insulation layer 3, and a second heat conduction medium is provided between the lining layer 301 and the bottom of the temperature control pot, and the two transfer heat indirectly through the second heat conduction medium. The second heat conduction medium can be a heat conduction oil that can operate stably at a high temperature of 350 °C.

[0040] The mass ratio of the second silicone rubber shell to the second expander is 1: 0.5-2.

[0041] The second silicone rubber shell is also provided with a stainless steel reinforcing rib; the first expander and the second expander are any one of water, ethylene glycol and glycerol. The difference is that the boiling points of water, ethylene glycol and glycerol are different, so the expansion temperatures of the heat insulation unit 302 and the swelling unit 305 are different, and thus the final temperature of the cooking area of the temperature control pot is different, which can be reasonably selected according to needs.

[0042] Meanwhile, the inventor found that in the actual operation of the above solution, there is a risk that the temperature of the second heat-conducting medium exceeds 300 °C (i.e., the service temperature of silicone rubber), which in turn affects the service life of the heat-insulating unit 302. To solve the above problems, as Figure 2 shown, a second support plate 304 is specifically provided between the first support plate 303 and the expansion unit 305. The first support plate 303 is provided with a first through hole 3031 for transferring heat from bottom to top, and the second support plate 304 is provided with a second through hole 3041 for transferring heat from bottom to top. The first through hole 3031 and the second through hole 3041 are arranged in a dislocation in the heat transfer direction. During the heating-up stage, the heat-conducting oil can pass through the first through hole 3031 and the second through hole 3041 to accelerate the heat transfer from the bottom to the heat-insulating unit 302, improving the heat transfer rate; when the expansion unit 305 expands due to heat, the second support plate 304 slides upward and contacts the first support plate 303; due to the dislocation arrangement of the first through hole 3031 and the second through hole 3041, at this time, the first through hole 3031 and the second through hole 3041 are closed as the main heat paths, and the heat can only be mainly propagated by penetrating the second support plate 304 and the first support plate 303. Thus, overall, the heat-insulating effect after the contact between the second support plate 304 and the first support plate 303 is better than that before their separation, which is beneficial to preventing the temperature of the second heat-conducting medium outside the heat-insulating unit 302 from being too high and causing the reduction of the service life of the heat-insulating unit 302. To ensure the heat-insulating effect, the second support plate 304 and the first support plate 303 are preferably made of low-thermal-conductivity ceramic materials with a thermal conductivity < 0.2 W / m·K.

[0043] Meanwhile, the second heat-conducting medium mostly uses heat-conducting oil, which can be below 350 °C, but the outer surface temperature of the cooking utensil during cooking on the stove can usually be as high as 400 - 500 °C. Therefore, there is an over-temperature risk during the use of the second heat-conducting medium, greatly reducing its service life. To solve the above problems, as Figure 2As shown in the figure, a third support plate 306 for fixing the expansion unit 305 and slidably connected to the side wall 2 is provided in the heat insulation layer 3; a fourth support plate 307 fixedly connected to the side wall 2 is provided between the third support plate 306 and the bottom of the heat insulation layer 3; the third support plate 306 is provided with a third through hole 3061 for transmitting heat from bottom to top. A first cavity 308 is provided between the fourth support plate 307 and the bottom of the heat insulation layer 3, and the bottom of the first cavity 308 is filled with a first heat-conducting medium; the first heat-conducting medium is molten salt and can be stably used at temperatures below 600°C. During the heating-up stage, the first heat-conducting medium first absorbs heat and melts, and exchanges heat with the second heat-conducting medium through the fourth support plate 307. The third through hole 3061 serves as a good heat channel, which helps to quickly heat up. At the same time, since the second heat-conducting medium does not contact the heating interface, it avoids the influence of ultra-high temperature in the heating area on the second heat-conducting medium; when the expansion unit 305 expands due to heat, the third support plate 306 slides downward and closes with the fourth support plate 307, and the heat channel of the third through hole 3061 is closed. Heat can only be mainly transmitted by penetrating the third support plate 306 and the fourth support plate 307. Thus, overall, the heat insulation effect after the third support plate 306 and the fourth support plate 307 are in contact is better than that before their separation, which is beneficial to preventing the temperature of the second heat-conducting medium from being too high and reducing the service life of the second heat-conducting medium. To ensure the heat insulation effect, the third support plate 306 and the fourth support plate 307 are preferably made of low-heat-conducting ceramic materials with a heat conductivity coefficient < 0.2 W / m·K.

[0044] The bottom shell 1 is provided with a heating area 101 and heat dissipation areas 102 on both sides of the heating area 101. After the heat entering the heat insulation layer 3 and even the cooking area is blocked, it can dissipate heat quickly in the heat dissipation areas 102 on both sides.

[0045] The top of the heat insulation layer 3 and the free end surface of the side wall 2 connected to the heat insulation layer 3 form the cooking chamber of the intelligent temperature-controlled pot; at the same time, one side of the heating area 101 is connected to the bottom of the heat insulation layer 3, the side part of the heat insulation layer 3 is connected to one side of the side wall heat insulation 2, and the other side of the side wall 2 is connected to the heat dissipation area 102; the design of the heat dissipation area 102 makes it difficult for heat to enter the heat dissipation area 102 or the cooking area; to ensure the heat insulation effect, the side wall 2 is preferably made of low-heat-conducting ceramic materials with a heat conductivity coefficient < 0.2 W / m·K, and the thickness is selected according to actual needs. Embodiment

[0046] To better illustrate the technical solution of the present invention, the following embodiments are further proposed:

[0047] Those of ordinary skill in the art can understand that the above embodiments are specific cases for implementing the present invention, and in actual applications, various changes can be made in form and details without departing from the spirit and scope of the present invention.

Claims

1. An intelligent temperature-controlled pot, characterized in that, The main body of the intelligent temperature-controlled pot is provided with a bottom shell (1) on the heating side, a side wall (2) on the cooking side, and a heat insulation layer (3) at the bottom of the pot; One or more heat insulation units (302) that can expand at high temperatures are scattered inside the heat insulation layer (3), and after the heat insulation units (302) expand, a heat insulation layer is formed to reduce heat transfer; The heat insulation layer (3) is provided with a first support plate (303) slidably connected to the side wall (2); one side of the heat insulation unit (302) is fixedly connected to the first support plate (303); an expansion unit (305) that expands when heated and promotes the first support plate (303) to squeeze the heat insulation unit (302) is arranged between the first support plate (303) and the bottom of the heat insulation layer (3).

2. The intelligent temperature control pot according to claim 1, wherein The heat insulation unit (302) includes a first silicone rubber shell, heat insulation material particles, and a first expander; the mass ratio of the first silicone rubber shell, the heat insulation material particles, and the first expander is 1: 0.5-10: 0.05-0.

2.

3. The intelligent temperature-controlled pot according to claim 2, wherein The heat-insulating material particles are one or more of hollow glass microspheres and hollow ceramic microspheres; and / or, the heat-insulating material particles have a size of 5-50 μm and a true density of 0.2-1.0 g / cm 3 .

4. The intelligent temperature control pot according to claim 3, wherein The expansion unit (305) includes a second silicone rubber shell and a second expander; the mass ratio of the second silicone rubber shell and the second expander is 1: 0.5-2.

5. The intelligent temperature control pot according to claim 4, wherein The second silicone rubber shell is also provided with stainless steel reinforcing ribs; the first expander and the second expander are any one of water, ethylene glycol, and glycerol.

6. The intelligent temperature control pot according to claim 5, wherein A second support plate (304) slidably connected to the side wall (2) is further arranged between the first support plate (303) and the expansion unit (305); the first support plate (303) is provided with a first through hole (3031) for transferring heat from bottom to top, the second support plate (304) is provided with a second through hole (3041) for transferring heat from bottom to top, and the first through hole (3031) and the second through hole (3041) are arranged in a dislocation manner in the heat transfer direction.

7. The intelligent temperature-controlled pot according to claim 6, wherein The heat insulation layer (3) is provided with a third support plate (306) for fixing the expansion unit (305) and slidably connected to the side wall (2); a fourth support plate (307) fixedly connected to the side wall (2) is arranged between the third support plate (306) and the bottom of the heat insulation layer (3); the third support plate (306) is provided with a third through hole (3061) for transferring heat from bottom to top.

8. The intelligent temperature-controlled pot according to claim 7, characterized in that, A first cavity (308) is arranged between the fourth support plate (307) and the bottom of the heat insulation layer (3), the bottom of the first cavity (308) is filled with a first heat-conducting medium; the top of the heat insulation layer (3) is a lining layer (301), and heat is indirectly transferred between the lining layer (301) and the first heat-conducting medium through a second heat-conducting medium.

9. The intelligent temperature-controlled pot according to claim 8, characterized in that, The bottom shell (1) is provided with a heating area (101) and heat dissipation areas (102) located on both sides of the heating area (101); one side of the heating area (101) is connected to the bottom of the heat insulation layer (3), the side of the heat insulation layer (3) is connected to one side of the side wall (2), and the other side of the side wall (2) is connected to the heat dissipation area (102); the top of the heat insulation layer (3) and the free end surface of the side wall (2) on the side connected to the heat insulation layer (3) form the cooking chamber of the intelligent temperature control pot; the first heat conduction medium is molten salt; the second heat conduction medium is heat conduction oil.

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