CN2251946Y - Efficient electric heat pressure steamer - Google Patents

Abstract

The utility model relates to an efficient electric heating pressure steamer, and a heater of which is assembled between an electrode-sealing supporting seat and a sealing fixed sheet by an inner electrode, an outer electrode and an outer protective cover, and is arranged on the inner lower part of the pressure steamer. The outer protective cover is contacted with the ground, the outer electrode is connected to a zero line, and the inner electrode is contacted with a fire wire and the zero line at intervals. A steam body is provided with a favorable insulating layer. The steamer is sealed in the working process. Water is rapidly heated into steam with high temperature and high pressure, and the definite temperature and the definite pressure are kept in the steamer under the control of a temperature measuring circuit and an automatic temperature controlling circuit. Thus, the steam does not outwards leak in the whole working process. The utility model is also provided with a timing circuit and an overpressure protection device, and ensures the convenient and safe use.

Description

The high-efficiency electric-heating pressure steaming cooker

The utility model belongs to water storage hot type electric heating pressure steaming cooker.

Existing pressure cooker, its pot such as electric steamer body mostly is metal material, does not have good insulation measure, and a large amount of outer the flowing to of steam have been wasted a large amount of heat energy during work in the air, thereby the big efficient of its energy consumption is not high.

The purpose of this utility model provides a kind of at the problems referred to above and in the pot of insulation and sealing the water heating has been produced high temperature and high pressure steam with water-storage heater (with reference to the CN92235221.6 efficient electric water heater), keeps temperature and pressure certain in the pot and the high-efficiency electric-heating pressure steaming cooker that steam is not leaked by temperature detection and automatic temperature control circuit in entire work process.

The technical solution of the utility model is: water-storage heater is placed in the pot of insulation and sealing; make protection outer cover ground connection; external electrode connects zero-power line, and some alternate being connected on live wire and the zero line of interior electrode make and form cylindrical or parallel-plate electric field between adjacent two of the internal and external electrode.Water enchroachment (invasion) does not have whole electrodes from the beginning in pot, connects just Fast Heating of power supply water, and produces high temperature and high pressure steam, keeps temperature and pressure certain in the pot and steam is not leaked in whole work by temperature detection and automatic temperature control circuit.Safety valve is arranged on and covers, and effect shields when just superpressure occurring in the temperature control pot, and timing circuit can be controlled the heating work time.

Accompanying drawing of the present utility model is explained:

Fig. 1 is the utility model structural representation, 1-protection outer cover among the figure, 2-external electrode; electrode in the 3-, 4-electrode sealed support, 5-sealing and fixing sheet; the 6-electrical box, 7-thermistor (band protective sleeve), 8-demarcation strip; 9-steams dividing plate, and 10-steams shelf, 11-lower handle; the 12-upper handle, 13-pot body, 14-sealing ring; the 15-loam cake, 16-miniature lever, 17-safety valve

Fig. 2 is the utility model water-storage heater cylinder electrode radial section figure

Fig. 3 a, Fig. 3 b, Fig. 3 c are the utility model electrical schematic diagram

Below in conjunction with accompanying drawing the utility model is elaborated: the protection outer cover (1) that has hole among Fig. 1; external electrode (2) and interior electrode (3) are assembled between electrode sealed support (4) and the sealing and fixing sheet (5); and be assemblied in the interior bottom of a pot body (13); pot body (13) has heat-insulation layer; electrical box (6) is arranged on outside pot body (13); the thermistor (7) of band protective sleeve places in pot body (13); demarcation strip (8) places above the interior water-storage heater of a pot body (13); steaming shelf (10) places in pot body (13); steaming dividing plate (9) places on the steaming shelf (10); loam cake (15) is gone up with sealing ring (14); cover on pot body (13); and can by rotational fixation the upper handle (12) on the loam cake (15) and be fixed on assistant (11) on pot body (13) with loam cake (15) by sealing ring (a 14) locking and a sealing pot body (13), safety valve (17) places on the valve seat on the loam cake (15).Miniature lever (16) places outside pot body (13).

Fig. 3 a, Fig. 3 b, Fig. 3 c are electrical schematic diagrams, and wherein Fig. 3 a is a main circuit diagram, and Fig. 3 b is the D.C. regulated power supply schematic diagram, and Fig. 3 c is that the control circuit schematic diagram comprises temperature detection and automatic temperature control circuit, heating display circuit, timing circuit etc.

Described D.C. regulated power supply is formed in down; The former limit one of transformer BK terminates at main circuit insurance RD X1 place afterwards, other end connecting to neutral line N, and the BK felling meets rectifier bridge D ₁-D ₄Input, capacitor C ₁An end and rectification bridge output end anodally link to each other other end ground connection, capacitor C with three-terminal regulator block 7812 inputs ₂Resistance R ₁7812 outputs of one termination, other end ground connection.

Described temperature detection automatic temperature control circuit is formed in down: the thermistor R with negative temperature coefficient _t[label is (7) among Fig. 1] one termination+12V power supply other end connecting resistance R ₂Its tie point A is connected to 2 pin of NE555, R ₂Other end ground connection.Potentiometer W ₁One termination+12V power supply other end ground connection, adjustable end then connects 5 pin of NE555,6 pin of NE555 pass through resistance R ₃Connect+the 12V power supply, 4 pin, 8 pin connect+12V, 1 pin ground connection, and 3 pin pass through resistance R ₄Meet power discharging transistor VT ₁Base stage, VT ₁Grounded emitter, collector connecting relay J ₁, J ₂Coil and diode D ₅, D ₆An end, J ₁Coil, diode D ₅Another termination+12V, J ₂Coil and diode D ₅The other end then connect+the 12V power supply through K switch.

Described heating display circuit is formed in down: red light emitting diodes LED ₁A termination triode VT ₁The colelctor electrode other end is through resistance R ₅Connect+the 12V power supply green LED ₂An end ground connection, the other end and resistance R ₆Link to each other R ₆The other end is through J ₁Normally closed point connects+the 12V power supply.

Described timing circuit is formed in down: potentiometer W ₂One end is through resistance R ₇Connect+12V power supply, the other end and capacitor C ₃Link to each other and be connected to triode VT ₂Base stage, capacitor C ₃Other end ground connection, triode VT ₂Colelctor electrode connects+the 12V power supply, and emitter stage is through diode D ₇Be connected to 2 pin of NE555 in the automatic temperature control circuit.

The operation principle of foregoing circuit is described below:

(1) the temperature detection course of work temperature automatically controlled and the heating display circuit is:

The plug that plugs in, single-phase 220V power firestreak makes circuit X through insurance RD ₁There is electricity at the place, the work of transformer BK energising D.C. regulated power supply, and temperature detection and automatic temperature control circuit are also started working, at this moment, thermistor R _tResistance is bigger, resistance R ₂Resistance less, thereby their partial pressure value (being A point current potential) is lower, suitably regulator potentiometer W ₁Promptly adjust NE5555 pin current potential, make A point current potential be lower than NE5552 foot valve value level, thus NE5553 pin output high level, triode VT ₁The saturation conduction red light emitting diodes is bright, relay J ₁If coil electricity is K switch closure J then ₂Coil is also switched on, and its normally opened contact closure, interior electrode (3) energising are if running water submergence electrode is then heated rapidly in the pot.Produce steam, when vapor (steam) temperature constantly rose to set-point, the resistance of thermistor Rt also dropped to set-point, made A point current potential be higher than the threshold level of NE5552 pin, because of the NE5556 pin through R ₃All the time meet high level+12V, so 3 pin become low level by former high level, triode VT ₁End relay J ₁J ₂The normal battle of coil blackout tool opened, and heating stops, and insulating process begins, red Light-Emitting Diode LED ₁Go out green Light-Emitting Diode LED ₂Bright.When kettle temperature slowly drops to when being lower than set-point, the resistance of thermistor Rt rises and makes A point current potential be lower than the 2 foot valve value level of NE555, and its 3 pin becomes high level triode VT again ₁Saturation conduction once more, J ₁J ₂Adhesive and connect heating vapor (steam) temperature in pot once more and reach set-point once more once more.So constantly repeat said process, kettle temperature is remained near the set-point, the effect of K switch is the KJ that closes ₁J ₂The heating power of working simultaneously is big, otherwise heating power is little.

(2) course of work of timing circuit is: when the automatic temperature control circuit that plugs in is started working, because capacitor C ₃Both end voltage can not be suddenlyd change, so C ₃The triode VT that the two ends no-voltage is coupled ₂Base stage is a ground level, so end diode D ₇Bearing A point place is the back-pressure at the 2 pin places of NE555, and power supply is through resistance R subsequently ₇Potentiometer W ₂To capacitor C ₃Charging, capacitor C ₃The upper end is VT ₂Base potential constantly raises, when its current potential (is VT than the high about 1.4V of A point current potential ₂Emitter junction and D ₇The forward voltage drop sum) the VT time ₂Conducting, its emitter current is through diode D ₇And resistance R ₂Go into ground, so resistance R ₂Last pressure drop is the rapid rising of A point current potential so that be higher than the 2 foot valve value level of NE555, thereby makes output 3 pin become low level, triode VT ₁End J ₁J ₂The coil blackout heating stops regulator potentiometer W ₂Resistance is adjustable condenser C ₃Charging rate, thus timing length changed.

The characteristics of the utility model efficient electric heat pressure steamer are: the pot body has heat-insulation layer, Its structure can be designed to according to different situations: 1) internal layer metal material, and outer with moulding Material, air barrier is left in the centre; 2) internal layer is the enhancement mode engineering plastics, and skin is Metal; 3) all use engineering plastics. It utilizes water-storage heater handle in the pot of sealing Water is heated into high temperature and high pressure steam, and the whole course of work does not have steam and leaks outside, and it passes through temperature Vapor (steam) temperature is near set-point in detection and the automatic temperature control circuit control pot, and it has fixed The time circuit can regulate heat time heating time as required, the safety valve that its arranges just loses in temperature Discharging high steam during control avoids pot inner pressure to surpass permissible value.

Claims (3)

1; a kind of high-efficiency electric-heating pressure steaming cooker is characterized in that having on the dispatch from foreign news agency level (2) hole to surround interior electrode (3); on the protection outer cover (1) hole is arranged; surround the interior bottom of pot body (13) that external electrode (2) three is assembled between electrode sealed support (4) and the sealing and fixing sheet (5) and places better heat-insulation layer; electrical box (6) places outside pot body (13); thermistor (7) places in pot body (13); sealing ring (14) places in the loam cake (15); loam cake (15) places on pot body (13), by rotational fixation at the upper handle (12) on the loam cake (15) be fixed on lower handle (11) on pot body (13) with loam cake (15) and pot body (13) and be clipped in sealing ring (14) locking and sealing between them.Steaming shelf (10) places in pot body (13), steaming dividing plate (9) places on the steaming shelf (10), safety valve (17) places on the valve seat of loam cake (15), its heating evaporation process is under temperature detection and temperature automatically controlled and timing circuit control, in the pot body (13) of sealing and insulation, the water heating is produced high temperature and high pressure steam, and under foregoing circuit control, the temperature and pressure in the pot is controlled near the set-point, entire work process does not have steam and leaks outside, and the effect of safety valve (17) is to discharge high steam to surpass permissible value to avoid pot inner pressure when temperature control.

(2) according to the described high-efficiency electric-heating pressure steaming cooker of claim 1, it is characterized in that described pot body (13) has good heat-insulation layer, its structure can be designed to according to different situations: 1) internal layer metal material, skin is used plastics, and air barrier is left in the centre; 2) internal layer is the enhancement mode engineering plastics, and skin is a metal; 3) all use engineering plastics.

(3) according to the described high-efficiency electric-heating pressure steaming cooker of claim 1, it is characterized in that described temperature detection and temperature automatically controlled, the heating display circuit mainly is made of electronic components such as thermistor Rt and time base circuit NE555, and can connect in the following manner: temperature-sensing element thermistor R _t-termination+12V power supply, the other end and resistance R ₂Link to each other and be connected to 2 pin of time base circuit NE555, R ₂Other end ground connection, 6 pin of NE555 are through resistance R ₃Connect+the 12V power supply, 5 pin meet potentiometer W ₁Adjustable end, W ₁Two stiff ends then connect respectively+12V power supply and ground, and 3 pin of NE555 are through resistance R ₄Meet triode VT ₁, base stage, VT ₁Grounded emitter, collector connecting relay J ₁, J ₂Coil and red light emitting diodes LED ₁An end, J ₁Another termination+12V power supply of coil, J ₂The coil other end then connects+the 12V power supply through K switch, red light emitting diodes LED ₁The other end through resistance R ₅Meet+the 12V power supply green emitting diode LED ₂An end ground connection, other end connecting resistance R ₅, R ₆The other end through relay J ₁Normally closed point connects+the 12V power supply.

(4), it is characterized in that described timing circuit is mainly by potentiometer W according to the described high-efficiency electric-heating pressure steaming cooker of claim 1 ₂, capacitor C ₃, triode VT ₂, electronic components such as NE555 constitute and can connect in the following manner: potentiometer W ₂An end through resistance R ₇Connect+the 12V power supply, another connects capacitor C ₃And with triode VT ₂Base stage links to each other, C ₃Other end ground connection, VT ₂Colelctor electrode connects+the 12V power supply, and emitter stage is through diode D ₇Connect 2 pin of NE555.

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