CN1771873A - Pressure rice cooker - Google Patents

Abstract

The present invention relates to one kind of pressure rice cooker. The timing system has one timer, which changes from the normally opening state to the closing state to turn on when the water nears boiling or is in boiling, so that the timing circuit begins to time. The pressure rice cooker can calculate the cooking time precisely, even if the pressure rice cooker has steam leakage, and thus has greatly raised practicability.

Description

A kind of electric pressure

Affiliated technical field

The invention belongs to the improvement of electric pressure cooking saucepan

Background technology

Electric pressure cooking saucepan is electric pressure again.It is human main cooking vessel, and household electric appliances are all improved it in all one's effort research all over the world.Though room for improvement is more and more littler, a bit improving of it just is enough to the human lives is produced great effective influence.Electric pressure cooking saucepan has the advantage of time-saving energy-saving, but there is defective in existing electric pressure cooking saucepan on the time is cooked in control.The zequin of existing electric pressure cooking saucepan heat time heating time has two kinds of modes: a kind of be from reach the high temperature rated high pressure promptly during 115 ℃ of left and right sides timer just begin the timing of walking about, another kind is the timing of power turn-on heating just carrying out from the beginning.These two kinds of modes all have weak point.In first kind of mode, make and produce gas leakage in the pot if the pot cover sealing ring is stained with thing such as rice sometimes, perhaps forgotten putting pressure limiting valve sometimes, also have other reasons to make the interior gas leakage of pot not rise pressure, water in the pot does not reach the nominal operation temperature, pressure forever, timer just can not walked about like this, and heat-generating disc continues not stop paying out heat, and the result burns out food and pot body.But if from power turn-on heating just carrying out timing, then because how much different the water yield is, effectively the time of cooking is difficult to accurately calculate setting, the difficult control of the food duration and degree of heating for the equal factor of water temperature, reality.

Summary of the invention

In order to overcome the defective of existing electric pressure cooking saucepan, the invention provides a kind of electric pressure, the timing system of this electric pressure adopts a kind of timing new method, can accurately set the time of cooking, and control is accurately.

The technical solution adopted for the present invention to solve the technical problems is: in the timing system of electric pressure, timer circuit becomes closure state by normally open when water closes on boiling or boiling (about 100 ℃), timer circuit is connected and is picked up counting, even like this pot in the sealing bad liter not temperature, pressure, timer also guarantees the timing of normally walking about, and owing to close on boiling near 115 ℃, promptly arrive more than 115 ℃ as long as heat a few minutes again.

The invention has the beneficial effects as follows: even gas leakage or water temperature water yield difference also can operate as normal, accurately regulate and cook the time, make food boil just rightly.Raising to the cooking quality level of whole electric pressure cooking saucepan industry has great function.

Description of drawings

The present invention is further described below in conjunction with drawings and Examples

Fig. 1 is one of electrical schematic diagram of the present invention

1. normally opened contacts among the figure, 2. normally-closed contact, 3. heater, 4. time switch,, 5. timer.

The specific embodiment

The present invention's enforcement that can in all sorts of ways, its timing system can be used the general timer circuit, also can make the electronics computer circuits of thermometric spare with thermistor, temperature controller or thermistor be contained in can the sensing pot in the place of water temperature, temperature controller have one when temperature near or become the normally opened contact (1) of closure state when reaching the water boiling by off-state.Set timer (5) heat time heating time according to food menu, after plugging in, electric current is by specified constant temperature and pressure switch normally-closed contact (2) flow through heater (3), time switch (4), when being heated to when closing on water boiling or boiling, normally opened contact (1) closure makes timer (5) begin the timing of walking about, and walking about by setting-up time when timer finishes, time switch (4) disconnects, and heating stops.Like this no matter whether pot cover leaks gas, whether reach specified hot operation temperature and pressure in the pot, timer can both carry out work by the time of setting, guarantee that food and pot body are not damaged, simultaneously no matter pot interior food what and how many differences of initial water temperature, can both accurately set effectively and cook the time, make food boil just rightly.If change thermistor into, its principle is identical with temperature controller.This thermistor temperature near or (the same when arriving the water boiling with temperature controller, the approaching more boiling of temperature is good more) its change in resistance makes timing circuit become conducting state by off-state, timer picks up counting, reach setting-up time after, heater circuit disconnects, and heating stops.

Claims (1)

1, a kind of electric pressure is characterized in that in the timing system of electric pressure, and timing circuit becomes closure state by normally open when water closes on boiling or boiling (about 100 ℃), and timer circuit is connected and picked up counting.

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