CN102961039A

CN102961039A - Timing system for electric pressure steamer

Info

Publication number: CN102961039A
Application number: CN2012105047170A
Authority: CN
Inventors: 叶娟
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-11-27
Filing date: 2012-11-27
Publication date: 2013-03-13

Abstract

A timing system for an electric pressure steamer comprises a normally open contact, a normally closed contact, a heater, a timing switch and a timer, wherein the heater is connected with the normally closed contact in series to form a heating circuit; the normally open contact is connected with the timer in series to form a timing circuit; and the heating circuit and the timing circuit are connected with the timing switch in series after the heating circuit is connected with the timing circuit in parallel. The timing system has the benefits that the timing system can operate normally under the conditions of air leakage or different water temperatures and water quantity, the heating time can be prepared to be adjusted, and food can be heated appropriately. The timing system plays an important role in improving cooking quality of the entire electric pressure cooker industry.

Description

The timing system of electric pressure steamer

Technical field

The present invention relates to a kind of timing system, particularly a kind of timing system of electric pressure steamer.

Background technology

Electric pressure cooking saucepan has become human main cooking vessel gradually, all over the world household electric appliances all one's effort Improvement it.Although room for improvement is more and more less, 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 existing electric pressure cooking saucepan is using the control time to have defective.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 namely during 115 ℃ of left and right sides timer just begin the timing of walking about, another kind is that timing is just carried out in from the beginning power turn-on heating, and these two kinds of modes have weak point.In first kind of way, if being stained with food sometimes, seal ring of pot cover will make generation gas leakage in the pot, perhaps sometimes forgotten putting pressure limiting valve, also have other reasons to make pot meat gas leakage 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 just carry out timing from power turn-on heating, then because how much different the water yield is, the equal factor of water temperature, actual effective heating time is difficult to calculate to be set, and also is difficult to control the duration and degree of heating.

Summary of the invention

Goal of the invention: in order to overcome the defective of existing electric pressure cooking saucepan, the invention provides a kind of timing system of electric pressure steamer, the timing system of this electric pressure steamer adopts a kind of timing new method, can prepare to set heat time heating time, and control accurately.

Technical scheme: a kind of timing system of electric pressure steamer, comprise normally opened contact, normally-closed contact, heater, time switch and timer, heater is connected with normally-closed contact and is formed heater circuit, normally opened contact is connected with timer and is formed timing circuit, connects with time switch after described heater circuit and the timing circuit parallel connection.

Timer circuit becomes closure state by normally open when water closes on boiling or boiling (about 100 ℃), timer circuit is connected the beginning timing, 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 ℃, namely arrive more than 115 ℃ as long as heat again a few minutes.

Beneficial effect: even gas leakage or water temperature water yield difference also can work, prepare to regulate heat time heating time, make the food heating just right.Raising to the cooking quality level of whole electric pressure cooking saucepan industry also has great effect.

Description of drawings

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

The specific embodiment

Further specify by reference to the accompanying drawings.

As shown in the figure, a kind of timing system of electric pressure steamer, comprise normally opened contact 1, normally-closed contact 2, heater 3, time switch 4 and timer 5, heater 3 is connected with normally-closed contact 2 and is formed heater circuit, normally opened contact 1 is connected with timer 5 and is formed timing circuit, connects with time switch 4 after described heater circuit and the timing circuit parallel connection.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 with thermistor the electronics computer circuits of temperature measurement one, temperature controller or thermistor be contained in can the sensing pot in the place of water temperature, temperature controller has a normally opened contact 1 that is become closure state when temperature approaches or reaches water and seethe with excitement by off-state.5 heat time heating times of time setting timer of the article that heat as required, 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, when timer is walked about complete by setting-up time, 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 the food and the pot body that heat are not damaged, simultaneously no matter pot interior food what and how many differences of initial water temperature, can both accurately set effective heating time, make article heat just rightly.If change thermistor into, its principle is identical with temperature controller.This thermistor is (the same with temperature controller when temperature approaches or arrive the water boiling, temperature is better near boiling) its change in resistance is so that timing circuit becomes conducting state by off-state, timer begins timing, reach setting-up time after, heater circuit disconnects, and heating stops.

Claims

1. the timing system of an electric pressure steamer, it is characterized in that: comprise normally opened contact (1), normally-closed contact (2), heater (3), time switch (4) and timer (5), heater (3) is connected with normally-closed contact (2) and is formed heater circuit, normally opened contact (1) is connected with timer (5) and is formed timing circuit, connects with time switch (4) after described heater circuit and the timing circuit parallel connection.