CN2418796Y

CN2418796Y - Safety electric pressure cooker

Info

Publication number: CN2418796Y
Application number: CN 00227652
Authority: CN
Inventors: 黄焯坤
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-03-27
Filing date: 2000-03-27
Publication date: 2001-02-14
Anticipated expiration: 2010-03-27

Abstract

The utility model relates to a safety electric pressure cooker, which is composed of a cooker cover, a casing, an outer cooker, an inner cooker sheathed in the outer cooker, a heating tray arranged below the inner cooker, a temperature controlling (pressure controlling) component of a single chip machine, etc. A temperature sensor connected with the temperature controlling (pressure controlling) component is arranged on the heating tray for realizing the control of the temperature and the pressure in the cooker. The supporting foot of the heating tray has a circular flat bottom structure. The bottom of the outer cooker is a thin plane. A pressure signal switch connected with the single chip machine is arranged at the lower bottom of the outer cooker. The utility model has the advantages of simple structure, compact structure, easy manufacture, high automation of control mode, complete function, low cost, and safe utilization.

Description

A kind of safety electric pressure cooker

The utility model relates to a kind of safety electric pressure cooker.

No matter existing electric pressure cooking saucepan is pressure-controlled or controlling temp type, its safety device mostly is being provided with pressure limiting valve, on the basis of safety valve, again heat-generating disc and outside be provided with between the bottom of a pan can realize in, the elastic supporter that elasticity connects between the outer pot, or the outer the bottom of a pan is designed to corrugated plating, or the outer the bottom of a pan is designed to ring-shaped groove corrugated plating and beading, with this structure pressure signal is transformed into displacement signal and realizes control automatically, and when safety valve stops up, when pot inner pressure reaches safe pressure, can cut off heater circuit automatically, guarantee the safe in utilization of electric pressure cooking saucepan, as Chinese patent 91100026.7 and 93216338.6 disclosed technical schemes.But said structure is owing to need elastic supporter to be set between interior outer pot or the outer the bottom of a pan is designed to corrugated plating, and therefore, difficulty of processing is big, cost is higher, poor, the debug difficulties of repeatability and uniformity, the mechanical control method automaticity is low, and promoting the use of of electric pressure cooking saucepan is restricted.For this reason, someone adopts the technical scheme in the outer the bottom of a pan of thin plate, when inner pot pressure increases, pressure is delivered to heat-generating disc by the interior the bottom of a pan and is delivered to the outer the bottom of a pan of thin plate again and makes it that elastic deformation take place, and the travel switch of directly being controlled in the heater circuit by the rigid rod that is fixed on this bottom of a pan, plane is under used safely with the automatic control or the assurance of realization pressure again.Though this technical scheme can address the above problem, but owing to be that several feets of heat-generating disc contact with the outer the bottom of a pan between heat-generating disc and the outer the bottom of a pan, contact area is little, so when the outer the bottom of a pan is a thin plate structure, and the outer pot bottom position that several feet contacted of heat-generating disc is much bigger than other position, the bottom of a pan pressure, and the intensity in the thin plate the bottom of a pan is less again, and therefore outer the bottom of a pan deformation quantity everywhere differs bigger, poor linearity, influence the accurate sampling of pressure, thus the precision of influence control; If with the bottom of a pan outside the thick plane, then elasticity is little, intensity is big, is difficult to control by deformation.

The purpose of this utility model provides a kind of simple in structure, handling ease, and cost is lower, saves material, automaticity height, safe and reliable, safety electric pressure cooker that the suitability for industrialized production fidelity factor is high.

The utility model is achieved through the following technical solutions: the utility model includes pot cover, shell, outer pot, be enclosed within interior pot in the outer pot, heat-generating disc, based on the temperature control assembly of single-chip microcomputer, between pot cover and interior pot, be provided with sealing ring, pot cover is fastened on the outer pot, on heat-generating disc, be provided with the temperature sensor that is connected with the temperature control assembly, the bottom of outer pot is a thin plate, the feet of heat-generating disc is the ring-shaped flat bottom structure, heat-generating disc is set directly on the outer the bottom of a pan, and the lower bottom part of outer pot has been provided with and has pressed signaling switch, risen and press signaling switch to be connected with single chip circuit.

Good effect of the present utility model is because the regulation and control when adopting the mode of gold temperature automatically controlled (pressure control) to realize operate as normal, and the outer the bottom of a pan is designed to thin plate, the feet of heat-generating disc is designed to the ring-shaped flat bottom structure, increased the contact area between heat-generating disc and the outer the bottom of a pan thin plate, outer the bottom of a pan pressure is more even, pressure diminishes, therefore, the outer the bottom of a pan had both had good elasticity, enough intensity is arranged again, has the better linearity degree when making the pressurized generation elastic deformation of the outer the bottom of a pan, and the bottom of a pan peripheral distortion amount unanimity, when the pressure in temperature-controlling system is malfunctioning in the pot reached safe pressure, pressure release was carried out in the sealing in pot decline destroyed just in the elastic deformation in the outer the bottom of a pan made between pot and the sealing ring, guarantees the safety of using.Therefore, it has simple in structure, handling ease, saving material, automaticity height, cost than the end, suitability for industrialized production fidelity factor height, safe and reliable characteristics.

Below in conjunction with accompanying drawing the utility model is described in further detail.

Accompanying drawing 1 is the utility model structural representation sketch;

Accompanying drawing 2 is the upward view of the utility model heat-generating disc;

Accompanying drawing 3 is the upward view of another embodiment heat-generating disc of the utility model.

As shown in drawings, the utility model comprises pot cover 1, shell, to be enclosed within outer pot 3 in the shell, to be enclosed within interior pot 4, heat-generating disc 5 in the outer pot 3, to be provided with the single-chip microcomputer between shell and outer pot 3 be the temperature control assembly 7 of core component, between pot cover 1 and interior pot 4, be provided with sealing ring 2, pot cover 1 is fastened on the outer pot 3, in heat-generating disc 5, be provided with one and experience temperature (pressure) temperature sensor 8 just, temperature sensor 8 is connected with temperature control assembly 7, the temperature signal of interior pot 4 can be passed to temperature control assembly 7 to realize automatic control of the present utility model by temperature sensor 8.Outer pot 3 usefulness thin metal materials constitute, and its bottom is the plane, and the feet 9 of heat-generating disc 5 is the ring-shaped flat bottom structure, and feet 9 can be that an independent ring constitutes; Also can be made up of the concentric ring more than 2, feet 9 can be a closed hoop at the bottom of these ring-shaped flat; It also can be the discontinuous ring that is combined into by the arc flat foot more than 2 sections, heat-generating disc 5 is set directly on the outer the bottom of a pan, like this, because there is bigger contact area in the feet 9 and the outer the bottom of a pan of heat-generating disc 5, therefore outer the bottom of a pan pressurized is more even, pressure is less, both guaranteed that there was certain intensity in the outer the bottom of a pan, make the whole outer the bottom of a pan that certain elasticity is arranged again, and the bottom of a pan peripheral distortion amount unanimity, make the utility model when super normal pressure, have enough deformation to make the seal break-off of sealing ring 2, realize pressure release, guarantee safety; Outer pot 3 lower bottom parts are provided with and press signaling switch 10 together, rising and pressing signaling switch 10 is contact switch, rise to press signaling switch 10 to be connected with single chip circuit in the temperature control assembly 7, one has pressure to make the outer the bottom of a pan that deformation take place in the interior pot 4, plays a pressure signaling switch 10 promptly to control signal of single-chip microcomputer.

For the feet 9 that makes the utility model heat-generating disc 5 can have bigger contact area with the outer the bottom of a pan, outer the bottom of a pan pressurized is more even, and it is flat that the feet 9 of heat-generating disc 5 is designed to a complete disc.

For making the outer the bottom of a pan of thin plate guarantee under certain flexible prerequisite bigger intensity being arranged, guarantee the good linearity of the outer the bottom of a pan when deformation, outside the feet 9 of heat-generating disc 5 and thin plate, between the bottom of a pan layer of metal plate 11 is set, externally booster action is played in the bottom of a pan, and metallic plate 11 can be made of cold-reduced sheet or corrosion resistant plate or steel spring plate; This layer metallic plate can be entire plate, also can be designed to some and place side by side.

The utility model in use, elder generation chooses required temperature (pressure) according to the food of cooking and needs the time of pressurize on control panel, in interior pot 4, install the food that to cook then, interior pot 4 is put into outer pot 3, pot 4 upper edges in sealing ring 2 places, after closing lid, pot cover 1 forms sealing with interior pot 4, connects power supply again and makes that pot 4 heats in 5 pairs of the heat-generating discs.Carrying out along with heating, pressure (temperature) in the interior pot 4 rises, in interior pot 4 under the effect of pressure, heat-generating disc 5 makes the bottom of the outer pot 3 of slim steel formation that deformation take place gradually by the flat feet 9 of the big floor space under it, deformation at the beginning, the bottom of a pan has promptly promoted to press signaling switch 10, give control signal of single-chip microcomputer, temperature control assembly 7 is started working, when the pressure in the interior pot 4 is in working pressure range, the deformation at 3 ends of outer pot is not enough to destroy the sealing of pot cover 1 and interior pot 4, in this scope, when the temperature in temperature sensor 8 is experienced in the pot 4 reaches setting value, promptly cut off heating power supply by temperature control assembly 7, no longer internally pot 4 heating are boosted, and the temperature in the interior pot 4 descends gradually; When kettle temperature descends when reaching certain value gradually, temperature sensor 8 is connected heating power supplies by temperature control assembly 7 again, heat-generating disc 5 heating of switch on once more, and the pressure of pot 4 gos up again gradually in making, and reaches when setting value, and the circuit that generates heat disconnects again.So periodic duty to the dwell time uses up, and then temperature control assembly 7 promptly cuts off heating power supply, and cooking process is finished, and enters keeping warm mode automatically.

Malfunctioning in the use as temperature control assembly 7 or temperature sensor 8, pressure in the interior pot 4 constantly rises, the downward deformation in outer pot 3 bottoms continues to increase, interior pot 4 also moves down gradually, when the pressure in the interior pot 4 reaches safe pressure, the 4 downward displacements of interior pot have destroyed the sealing between pot cover 1 and the interior pot 4, and interior pot 4 just passes through the slit pressure release between pot cover 1 and the interior pot 4.Because the utility model is controlled heater circuit automatically by temperature control assembly 7 in normally-pressured neighbor; Temperature control assembly 7 is malfunctioning, also can be by pressure release between pot cover 1 and the interior pot 4, and therefore, the utility model controlling organization automaticity height, handling ease can be guaranteed the safety in the use.

For making the utility model that more multiple tracks security perimeter in use be arranged, also can pressure limiting valve 6 be set on pot cover 1, so just can form following security perimeter; During operate as normal, by the pressure in the pot 4 in 7 controls of temperature control assembly; Temperature control assembly 7 is malfunctioning, can be by pressure limiting valve 6 pressure releases on the pot cover 1; If pressure limiting valve 6 is also blocked, then can really guarantee safety by pressure release between pot cover 1 and the interior pot 4 at last.

Claims

1, a kind of safety electric pressure cooker, include pot cover (1), shell, outer pot (3), be enclosed within the interior pot (4) in the outer pot (3), heat-generating disc (5), temperature control assembly (7) based on single-chip microcomputer, between pot cover (1) and interior pot (4), be provided with sealing ring (2), pot cover (1) is fastened on the outer pot (3), on heat-generating disc (5), be provided with the temperature sensor (8) that is connected with temperature control assembly (7), the bottom that it is characterized in that outer pot (3) is a thin plate, the feet (9) of heat-generating disc (5) is the ring-shaped flat bottom structure, heat-generating disc (5) places outer pot (3) end and interior pot between (4) end, the lower bottom part of outer pot (3) is provided with and presses signaling switch (10) together, and this switch is connected with the single-chip microcomputer of temperature control assembly (7).

2, safety electric pressure cooker according to claim 1 is characterized in that the feet (9) of heat-generating disc (5) is combined by discontinuous arc flat foot more than 2 sections.

3, safety electric pressure cooker according to claim 1 is characterized in that feet (9) is that a complete disc is flat at the bottom of the ring-shaped flat of heat-generating disc (5).

4,, it is characterized in that on pot cover (1), being provided with pressure limiting valve (6) according to claim 1 or 2 or 3 described safety electric pressure cookers.

5, safety electric pressure cooker according to claim 4 is characterized in that being provided with layer of metal plate (11) between at the bottom of the feet (9) of heat-generating disc (5) and outer pot (3) thin plate.