WO2009000148A1 - Autocuiseur électrique et cuiseur électrique - Google Patents

Autocuiseur électrique et cuiseur électrique Download PDF

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Publication number
WO2009000148A1
WO2009000148A1 PCT/CN2008/001132 CN2008001132W WO2009000148A1 WO 2009000148 A1 WO2009000148 A1 WO 2009000148A1 CN 2008001132 W CN2008001132 W CN 2008001132W WO 2009000148 A1 WO2009000148 A1 WO 2009000148A1
Authority
WO
WIPO (PCT)
Prior art keywords
heating plate
electric pressure
connecting rod
pan
pressure cooker
Prior art date
Application number
PCT/CN2008/001132
Other languages
English (en)
Chinese (zh)
Inventor
Guohua Guan
Original Assignee
Guohua Guan
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CNB2007101277191A external-priority patent/CN100496350C/zh
Application filed by Guohua Guan filed Critical Guohua Guan
Publication of WO2009000148A1 publication Critical patent/WO2009000148A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A47J27/08—Pressure-cookers; Lids or locking devices specially adapted therefor
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A47J27/004—Cooking-vessels with integral electrical heating means
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J36/00—Parts, details or accessories of cooking-vessels
    • A47J36/02—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay

Definitions

  • the present invention relates to the field of electric heating pots, and more particularly to an improved technique for electric heating pots such as electric pressure cookers and rice cookers.
  • pan liner on the upper part of the electric heating plate.
  • the pan liner is generally made of aluminum material, and the inner surface of the pan liner is coated with non-stick material, because of non-stick coating such as special fluorine.
  • the dragon can decompose at 260 ° C to produce carcinogenic toxic substances, which is not conducive to human health.
  • stainless steel pan liner has appeared since 2000, but the heating plate for heating the inner liner adopts the technology of casting the aluminum plate into the heating plate. Because of the different thermal expansion coefficients of aluminum and stainless steel, it can be caused by heating. The gallbladder has poor contact with the heating plate and the temperature distribution is uneven. In addition, the thermal conductivity of stainless steel is 16.1W/m'C ⁇ 26.4W/m'C, the thermal conductivity of aluminum is 160W/m V , and the thermal conductivity of stainless steel is only 1/6 ⁇ 1/10 of aluminum. Stainless steel liner The contact with the heating plate is slightly uneven, the heat can not be transmitted in time, and it is easy to burn the rice or burn the rice during cooking.
  • the inner liner composite bottom structure is generally adopted, which is generally a three-layer structure.
  • the inner layer of the CN2428061, CN2566770 CN2623129 and the lower layer of the composite bottom disclosed by the Chinese Patent Office are Stainless steel, the middle interlayer is aluminum, and the sandwiched aluminum plate is thicker, up to 2mm, to force the thermal deformation of the stainless steel layer to be consistent with the interlayer.
  • Confirmation Steel and aluminum have different thermal variability factors. After repeated use, the aluminum layer and the stainless steel layer are easily separated. The inner liner can only last for half a year.
  • the heating plate is generally fixed on the chassis of the inner cover by the supporting legs, and the heating plate cannot be moved. Due to the installation error or the use deviation, the heating plate and the bottom of the pan may be in point contact and cannot be adjusted to the optimal contact state. Even if there is an electric pressure cooker whose heating plate can move up and down, it does not have an automatic self-aligning function, and the point contact condition cannot be improved, resulting in a casserole or a burnt meal during cooking.
  • Electric heating pots such as electric pressure cookers and rice cookers are generally provided with temperature detecting and controlling devices, and the device is electrically connected with the control circuit to realize safe control of the electric heating pan.
  • the existing electric heating pot directly detects the inner temperature of the inner tube.
  • the heating plate needs an intermediate boring hole.
  • the thermistor is disposed in the middle opening of the heating plate, and the signal is transmitted to the control circuit through the temperature detection at the bottom of the body.
  • the disadvantage of adopting this method is that it requires more other supporting hardware, which is high in cost, complicated in structure and processing.
  • the temperature sensing portion is disposed in the middle of the heating plate, the temperature detection is susceptible to the temperature of the heating plate, so that the detection is performed. Inaccurate; again, due to the middle pupil, the contact area between the bottom of the pan and the heating plate is reduced, which affects the use effect of the electric heating pot.
  • the object of the present invention is to provide an electric pressure cooker and a rice cooker having a large contact area between the pan liner and the heat generating plate, uniform heating, simple structure, and low cost in order to solve the deficiencies of the prior art.
  • the present invention also provides an electric pressure cooker and a rice cooker which are controlled by temperature sensing of the temperature of the heat generating disk.
  • an electric pressure cooker a rice cooker, a temperature detecting and controlling device including a casing, a pot lid, a pot liner, a heating plate and an electric heating pot, and the pot liner is set in the heat
  • the upper part of the pan characterized in that the bottom of the pan liner is a stainless steel single layer knot Structure.
  • the contact surface of the bottom of the pan liner with the heating plate is an arc surface
  • the radius of the arc surface of the bottom of the pan is 3° larger than the radius of the arc surface of the heating plate. -30°/. , the best is 5%-10%.
  • the temperature detecting and controlling device of the electric heating pot is composed of a control circuit for connecting the heat sensitive element to the electric heating pot, the heat sensitive element is fixed on the heating plate, and the temperature of the heating plate is directly sensed by the heat sensitive element to control; the connection is fixed at The bottom of the heating plate is best.
  • the bottom of the heating plate is provided with a supporting leg, and a screw hole is formed in the bottom of the supporting leg, and the thermistor of the heat sensitive component is directly fixed on the screw hole through the mounting piece.
  • the mounting piece has a "ten" shape, and the opposite ends are provided with holes.
  • the two holes are fixed on the screw holes of the supporting legs by screws, and the other ends are bent to contain the thermistor.
  • the bottom of the heating plate is a floating connection structure
  • the floating connection structure comprises three or more support legs at the bottom of the heating plate, a screw hole is arranged at the bottom of the support foot, and a connecting rod is fixed on the screw hole.
  • the connecting rod is provided with elastic support, and the bottom of the connecting rod passes through a hole opened in the inner cover, and the aperture is larger than the diameter of the connecting rod.
  • the support legs are equidistantly disposed on the same circumference of the bottom of the heat generating plate.
  • the elastic support is one of a wire spring or a shrapnel assembly.
  • the elastic piece assembly is formed by a sleeve of two elastic pieces, and one or more sets of the elastic piece assemblies are serially connected to the connecting rod.
  • the stainless steel single-layer structure liner has a simple structure and low cost. Compared with the aluminum material, it does not need to increase the non-stick coating, and does not contain harmful substances, which is beneficial to People are in good health.
  • the invention adopts a stainless steel single-layer structure in the inner pot, because the bottom of the inner tank is connected with the heating plate.
  • the radius of the contact is slightly larger. After a large number of experiments, the thermal law of different materials is successfully mastered and used, which is 3%-30°/.
  • the radius of the heating plate is substantially the same as the radius of the bottom of the inner liner, so that the uniformity of heat can be effectively ensured, whereas in the prior art, the conventional view is to remain unheated.
  • the radius of the heating plate is the same as the radius of the bottom of the liner, so that the difference in thermal expansion coefficient of different materials in the heating state is not considered, such as the bottom of the pot and the heating plate on the 0.6 mm stainless steel material of the existing 202 type product.
  • the radius of curvature of the contact surface is the same, that is, the radius of the surface of the heating plate is 650 mm, and the radius of the bottom of the pan is also 650 mm.
  • the heating plate of the invention has a floating setting, and even if the inner liner is in contact with the hot plate or is inaccurate due to installation error or use deviation, the heating plate floats and automatically adjusts under the gravity of the inner pot and the food inside the pan.
  • the heart makes the bottom of the pan liner and the heating plate have a good working contact surface, the inner tank is heated evenly, and there is no situation of burning the rice.
  • the invention adopts the temperature to directly sense the temperature of the heating plate, does not need to open the temperature sensing hole on the heating plate, and does not need to heat-insulate both sides of the thermistor, thereby effectively reducing the processing cost and adopting the setting heat.
  • the sensitive component directly senses the temperature of the heating plate, not the temperature of the bottom of the pan, which can effectively avoid the temperature influence of the heating plate and the ambient temperature on the temperature of the thermistor in the conventional technology, the temperature sensing is more accurate, the use is safer, and the cost is lower.
  • the temperature measuring device of the invention can prevent the dry burning of the heating plate, and the temperature of the heating plate rises extremely rapidly when the heating plate is dry-burned, and the temperature of the heating plate can be increased when the traditional bottom temperature measuring method is dry burning. Up to 300'C or more, and the temperature of the thermistor is not high at this time, so it is not yet protected from power failure, so it affects the service life of the heating plate, and even causes an accident.
  • the temperature measurement of the heating plate, the thermistor can quickly sense the temperature of the heating plate during dry burning, so that the dry burning temperature of the heating plate is not too high, and the dry burning phenomenon can be effectively prevented.
  • the invention has been proved to have better use effect and safety performance.
  • the temperature measuring device of the invention has been experimentally proved that the invention directly controls the temperature of the heating plate by the heat sensitive component, and the effect thereof is greatly superior to the existing temperature sensing hole on the heating plate through the temperature sensing device.
  • the structure of the temperature sensing to control can effectively prevent accidents such as thousands of burning.
  • the present invention makes the product much less expensive than the conventional method due to the reduction of hardware accessories.
  • Figure 1 is a schematic view of the prior art of the inner surface of the pan liner and the heating plate in a cold state
  • Figure 2 is a schematic view of the prior art of the inner surface of the pan liner and the heating plate at 100 ° C
  • Fig. 3 is a schematic view of the prior art of the inner surface of the pan liner and the heating plate at 200 ° C
  • Fig. 4 shows a prior art contact surface between the bottom of the pan and the heating plate at 300.
  • Figure 5 is a schematic structural view of an electric pressure cooker according to the present invention.
  • Figure 6 is a schematic view showing the arc of the touch surface of the heating plate and the inner pot of the present invention.
  • Figure 7 is a plan view showing the planar structure of a part of the shrapnel assembly
  • Figure 8 is a schematic side view showing another part of the shrapnel assembly
  • Figure 9 is a schematic structural view of a portion of a temperature control device of the present invention.
  • Figure 10 is a schematic view showing the structure of the mounting piece.
  • Figure 1 - Figure 4 is a schematic diagram of the prior art between the bottom of the pan liner and the heating plate in the cold state, 100' (:, 200' C, 300 ⁇ , in the pot at normal temperature and cold state
  • the distance between the bottom of the bile and the contact surface of the heating plate is 0.
  • the distance between the 200 ° C is 0.5 mm
  • the distance between the 300 ° C is 1 mm.
  • the electric pressure cooker adopting the inner bottom of the single-layer stainless steel pan of the present invention comprises a pot cover (not shown), a casing, a pan liner 1, and an inner cover 2.
  • the inner cover chassis 3 and the heating plate 4 and the control circuit disposed on the inner cover chassis, the pan liner 1 is a stainless steel single-layer structure, and the bottom of the heating plate is provided with three or more support legs, and the support legs are equidistant Arranging on the same circumference of the bottom of the heating plate; three or more elastic piece assemblies 5 are equally arranged at the bottom of the corresponding heating plate 4, and the end of the elastic piece assembly 5 has a supporting end 6, and the upper part of the elastic piece assembly 5 is provided at an upper position a recessed hole 7 connected to the heating plate 4, a screw hole is arranged at the bottom of the support leg, and a connecting rod (screw) is fixed on the screw hole 8, and a spring piece assembly 5 is connected in series on the connecting rod 8, which is
  • the thermal expansion coefficient of stainless steel is lOJ X lO ⁇ m/cm/'C nJ X lO ⁇ m/m/'C, and the thermal expansion coefficient of aluminum is 24 X lC ⁇ m/m/'C.
  • the 304J1 13Cr-7.7 i-2Cu stainless steel pot which is suitable for the manufacture of the pot body has a thermal expansion coefficient of n ⁇ X lO ⁇ m / m / 'C, when the temperature rises from 25 ° C to 100 ° C, The size extends by 0.13%.
  • the inner liner of the pan is dry-fired after the actual measurement.
  • the temperature of the heating plate is 100 ° C
  • the arc top of the bottom surface of the stainless steel inner liner The gap between the top surface of the heating plate is 0.1mm; when the temperature of the heating plate is 200°C, the gap is 0.5mm; when the temperature of the heating plate is 300'C, the gap can reach 1mm.
  • the stainless steel inner bottom and the aluminum heating plate with the same curvature of curvature at room temperature are subjected to heat, and the gap between the tops of the arc increases continuously, gradually becoming the line contact of the outer circumference, and as the temperature of the heating plate increases, The contact condition of the curved surface is further deteriorated.
  • the reason for this situation is that the aluminum heating plate material is thicker. Due to the uniformity of thermal expansion, the radius R1 of the aluminum heating plate increases, and the curved surface is flatter. The main reason is that the stainless steel is inside. The biliary is thinner, and the radial expansion of the bottom material is constrained by the surrounding material to make the R2 smaller.
  • the radius R2 of the bottom surface of the bottom of the stainless steel pot of the present invention at room temperature is 3° larger than the radius R1 of the heating plate. -30%, it is verified that the best is 5°/. -10%.
  • the ratio of the size of R1 and R2 is related to the diameter of the stainless steel liner, the size of R1 and R2.
  • R2 is larger than R1
  • the bottom of the inner pot liner of the heated front is in contact with the heating plate at the top of the arc, which is a small-area contact.
  • the radius of the arc contact between the two approaches is uniform.
  • the diameter of the inner tank is 280.
  • the radius of the arc surface at different temperature points is shown in Table 2.
  • the elastic piece assembly is formed by a sleeve of two elastic pieces, and a plurality of sets of elastic piece assemblies can be connected in series on the connecting rod.
  • the temperature detecting and controlling device of the electric heating pot of the present invention is constituted by a control circuit 11 which is connected to the electric heating pot by a heat sensitive element, and the heat sensitive element is a thermistor 9, which is directly fixed to the heating plate.
  • a support hole 6 at the bottom of the bottom a screw hole is formed in the bottom of the support end 6, and the heat sensitive element thermistor 9 is fixed on the screw hole through the mounting piece 10; as shown in Fig. 6, the mounting piece 10 is expanded
  • the "ten" shape has holes on opposite ends. The two holes are fixed on the screw holes of the support legs by screws, and the other ends are bent to contain the thermistor.
  • the electric heating pan adopting the temperature detecting and controlling device of the invention can improve the temperature parameter of the control circuit by changing the temperature parameter of the original induction pan to the temperature parameter of the heating plate.
  • the inner pot of the electric pressure cooker is placed in the inner cover. Since the heating plate has the function of self-aligning, the inner surface of the electric cooker pan and the surface of the heating plate can be completely contacted, and the ingredients placed in the inner pot of the electric pressure cooker are uneven.
  • the shrapnel assembly automatically adjusts the shrapnel height to achieve an equilibrium state, so that the inner surface of the electric cooker pan and the hot plate are always in surface contact.
  • the inner surface of the electric cooker pan is kept in surface contact with the surface of the heating plate when the heat is generated, so that the base of the double-layer double-bottomed pan is not used. There will be no burning of rice.
  • the thermistor is not limited to the above-described mounting method, and a mounting hole may be provided on the heat generating plate, and may be directly disposed in the hole or the like.
  • the invention is applicable to an electric pressure cooker and a rice cooker.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Cookers (AREA)

Abstract

L'invention concerne un autocuiseur électrique/cuiseur électrique qui comprend un corps, un couvercle, un récipient intérieur (1), une plaque chauffante (4) et un dispositif de détection et de régulation de la température. Le récipient intérieur (1) est disposé au-dessus de la plaque chauffante (4). La base du récipient intérieur (1) est une structure monocouche en acier inoxydable.
PCT/CN2008/001132 2007-06-21 2008-06-12 Autocuiseur électrique et cuiseur électrique WO2009000148A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CNB2007101277191A CN100496350C (zh) 2007-06-12 2007-06-21 一种电压力锅
CN200710127719.1 2007-06-21

Publications (1)

Publication Number Publication Date
WO2009000148A1 true WO2009000148A1 (fr) 2008-12-31

Family

ID=40185173

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2008/001132 WO2009000148A1 (fr) 2007-06-21 2008-06-12 Autocuiseur électrique et cuiseur électrique

Country Status (1)

Country Link
WO (1) WO2009000148A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109875386A (zh) * 2019-04-24 2019-06-14 上海纯米电子科技有限公司 米饭口感均衡的电饭煲

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006311909A (ja) * 2005-05-09 2006-11-16 Corona Corp 調理鍋
CN2938674Y (zh) * 2006-07-18 2007-08-22 关国华 一种电加热锅的温度检测控制装置
CN200966550Y (zh) * 2006-11-02 2007-10-31 关国华 电压力锅/电饭锅用单层不锈钢锅内胆
CN201019527Y (zh) * 2006-08-31 2008-02-13 关国华 悬浮式电加热盘的电压力锅
CN101133929A (zh) * 2007-06-12 2008-03-05 关国华 一种电压力锅、电饭锅

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006311909A (ja) * 2005-05-09 2006-11-16 Corona Corp 調理鍋
CN2938674Y (zh) * 2006-07-18 2007-08-22 关国华 一种电加热锅的温度检测控制装置
CN201019527Y (zh) * 2006-08-31 2008-02-13 关国华 悬浮式电加热盘的电压力锅
CN200966550Y (zh) * 2006-11-02 2007-10-31 关国华 电压力锅/电饭锅用单层不锈钢锅内胆
CN101133929A (zh) * 2007-06-12 2008-03-05 关国华 一种电压力锅、电饭锅

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109875386A (zh) * 2019-04-24 2019-06-14 上海纯米电子科技有限公司 米饭口感均衡的电饭煲
CN109875386B (zh) * 2019-04-24 2024-03-29 纯米科技(上海)股份有限公司 米饭口感均衡的电饭煲

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