CN201414695Y

CN201414695Y - Improved electric pressure cooker

Info

Publication number: CN201414695Y
Application number: CN2009200248995U
Authority: CN
Inventors: 朱泽春; 蒋吉猛
Original assignee: HANGZHOU HONGYANG OUNANDUO ELECTRICAL APPLIANCES CO Ltd
Current assignee: HANGZHOU HONGYANG OUNANDUO ELECTRICAL APPLIANCES CO Ltd
Priority date: 2009-05-19
Filing date: 2009-05-19
Publication date: 2010-03-03
Anticipated expiration: 2019-05-19

Abstract

The utility model relates to an improved electric pressure cooker, which comprises an outer cooker, an inner cooker, a cooker cover, a sealing ring, an electric heating device, a control circuit and adisplacement transfer part, wherein the inner cooker is closed by the cooker cover and the sealing ring, the electric heating device is arranged on the bottom portion of the inner cooker, the controlcircuit controls the work of the electric heating device, and the displacement transfer part produces displacement along with the changing of the cooking pressure. The control circuit comprises a capacitive sensor which detects the changing of the cooking pressure, the displacement transfer part can drive a pole piece of the capacitive sensor to act, and the capacitive sensor is a compound capacitive sensor which is provided with three capacitive pole plates, two changing capacitive signals which detect the pressure state of the electric pressure cooker can be produced between the three capacitive pole plates, and the power of the electric heating device is from 100W to 3500W. The improved electric pressure cooker increases the pressure control accuracy of the electric pressure cooker, and increases the cooking flavors of food.

Description

A kind of follow-on electric pressure cooking saucepan

Technical field

The utility model relates to the technical field of pressure cooking, especially a kind of follow-on electric pressure cooking saucepan.

Background technology

The application with application number is: CN200710153849.2, and CN200710153850.5, CN200710153851.X, the technical scheme of CN200720158958.9 patent is the improvement project that the basis proposes.The electric pressure cooking saucepan of above-mentioned patent is by in pot courage bottom or pot cover capacitance sensor being set, the real-time detection and the control of pressure have been realized, pressure is adjustable continuously, can select different pressure according to the kind of food in cooking process, has improved the taste of food.The capacitance sensor that adopts in the technical scheme of above-mentioned patent includes two capacitor plates, a movable plate electrode, a fixed plate, during work, rising gradually along with pressure, the movable plate electrode of capacitance sensor moves closer to fixed plate, and the distance between two capacitor plates diminishes gradually, and control circuit is controlled the size of pot inner pressure by detecting electric capacitance change signal between movable plate electrode and the fixed plate.Because when low-pressure state, distance is distant between two-plate, capacitance is very little.This moment, the capacitance and the parasitic capacitance value between the holding wire of capacitance sensor differed less, can't detecting of the capacitance signal of capacitance sensor also is subjected to interference from outside signals, poor stability easily, low pressure detects and is forbidden the problem that departure is bigger when causing culinary art.Caused the easy prepared food thing taste that needs the employing low-pressure state to cook not good like this, the pressure controlled range of the capacitance sensor of this type is less, lack practicality, therefore the antijamming capability and the pressure detecting precision aspect of the capacitance sensor of this technical scheme still need further improvement, the applicant has proposed improvement project preferably on the basis of grinding its mechanism deeply.

The utility model content

For overcoming the deficiencies in the prior art, the utility model provides a kind of pressure precise control, can select the modified electric pressure cooking saucepan of different pressures during culinary art according to the situation of food.

In order to reach above-mentioned technical purpose, the utility model has adopted following technical proposals:

A kind of follow-on electric pressure cooking saucepan comprises the control circuit of the pot cover and the sealing ring of pot in outer pot, interior pot, the sealing, the electric heater unit that is arranged on interior pot bottom, the described electric heater unit work of control and changes the shift transmission part that produces change in displacement with culinary art pressure; Described control circuit comprises the capacitance sensor that detects the variation of culinary art pressure; Described shift transmission part can drive the action of capacitance sensor pole plate, and described capacitance sensor is the combined type capacitance sensor that is provided with three capacitor plates; Can produce the variation capacitance signal of two detection electric pressure cooking saucepan pressure states between described three capacitor plates; The power of described electric heater unit is that 100W is to 3500W.

Such scheme can also be further perfect by following technical measures:

Described three capacitor plates comprise two movable plate electrodes and are arranged on two fixed plates between the movable plate electrode; Relative fixed between described two movable plate electrodes, described movable plate electrode is connected with shift transmission part.

Perhaps described three capacitor plates comprise two fixed plates and are arranged on two movable plate electrodes between the fixed plate that described movable plate electrode is connected with shift transmission part.

Perhaps described three capacitor plates comprise a movable plate electrode, a fixed plate and be arranged on movable plate electrode and fixed plate between the elasticity pole plate, described movable plate electrode is connected with shift transmission part.

Described combined type capacitance sensor is placed in outer pot bottom, and perhaps described combined type capacitance sensor is placed in pot cover top.

Compared with prior art, the beneficial effects of the utility model are:

The combined type capacitance sensor that the utility model adopts forms two electric capacity between three capacitor plates, culinary art pressure signal in the pot is changed the displacement signal that causes change the capacitance signal that converts two variations to.Low-pressure state and high pressure conditions during two corresponding respectively culinary arts of capacitance signal, control circuit is controlled the size of culinary art pressure to satisfy the culinary art requirement of food by the power of regulating electric heater unit after selecting corresponding capacitance signal analyzing and processing according to the setting of program again.Because the combined type capacitance sensor is divided into two parts with the detection distance of former capacitance sensor, make the distance between the capacitor plate reduce over half at least like this, the also corresponding increase of capacitance, can make the value between the parasitic capacitance of the capacitance of capacitance sensor and holding wire differ one at least more than the order of magnitude after the adjustment, parasitic capacitance and of the influence of other interfering signals between holding wire have been effectively reduced to accuracy of detection, the accuracy of detection and the interference free performance of capacitance sensor have been increased, when having avoided under low-pressure state the capacitor plate distance far away, the shortcoming that the capacitance variations signal of sensor can't detect, improved the low pressure accuracy of detection greatly, the accurate control of low pressure that has realized culinary art pressure is to satisfy the culinary art requirement of a greater variety of foods, better guarantee the color and luster and the taste of food, reduced the loss of nutrition.

The combined type capacitor sensor structure is simple, compact, and cost is lower, helps producing in batches.

Description of drawings

Fig. 1 is the application structure schematic diagram of the utility model embodiment one;

Fig. 2 is the structure enlarged diagram of the capacitance sensor of the utility model embodiment one;

Fig. 3 is the application structure schematic diagram of the utility model embodiment two;

Fig. 4 is the enlarged diagram of the capacitive displacement transducer of the utility model embodiment two.

Among the figure:

1, outer pot; 2, interior pot; 3, pot cover; 4, sealing ring; 5, heating plate; 51, shift transmission part; 6, control circuit; 7, capacitance sensor; 71, top crown; 72, bottom crown; 73, movable plate electrode; 74, elasticity pole plate; 8, support; 9, elastic metal sheet; 10, spring; 11, locating piece.

The specific embodiment

Further specify the specific embodiment of the present utility model below in conjunction with accompanying drawing:

Embodiment one:

A kind of follow-on electric pressure cooking saucepan as shown in Figure 1 and Figure 2, comprise pot 2 in outer pot 1, interior pot 2, the sealing pot cover 3 and sealing ring 4, be arranged in pot 2 bottoms electric heater unit and control the control circuit 6 of described electric heater unit work, the power of described electric heater unit is 100W.Described control circuit 6 comprises the capacitance sensor 7 that detects the variation of culinary art pressure.Described capacitance sensor 7 is installed in the bottom of outer pot 1 by support 8.Electric heater unit is a heating plate 5, and the elastic metal sheet 9 that heating plate 5 is resetted is installed between heating plate 5 and the outer pot 1.Heating plate 5 is provided with shift transmission part 51.During culinary art, along with the rising of culinary art pressure, interior pot 2 promotes heating plate 5 and produces displacement downwards, and when culinary art pressure reduced, elastic metal sheet 9 promotes heating plate 5 and interior pot 2 upwards resets, and will cook pressure signal and convert displacement signal to.

Described capacitance sensor 7 is provided with three capacitor plates, and form two and detect electric capacity, be a kind of combined type capacitance sensor.Three pole plates comprise two fixed plates and a movable plate electrode 73.Two fixed plates are top crown 71 and bottom crown 72, are fixedly mounted on the sensor outer housing, and sensor outer housing is fixedlyed connected with support 8.Movable plate electrode 73 is arranged between top crown 71 and the bottom crown 72.Form low pressure between movable plate electrode 73 and the top crown 71 and detect electric capacity, and form high pressure detection electric capacity between the bottom crown 72.Described movable plate electrode 73 is fixedlyed connected with displacement touch part 51, and displacement touch part 51 can promote movable plate electrode 73 and move up and down between top crown 71 and bottom crown 72, the change in displacement of displacement touch part 51 is converted to the capacitance signal of two variations.After control circuit 6 selects low pressure detection capacitance signal or high pressure detection capacitance signal to come the input signal analysis circuit to handle according to the culinary art pressure of setting in the program, export the heating power of control signal control heating plate 5 again and regulate the size of cooking pressure in the interior pot 2, reach the purpose of regulating culinary art pressure.

During the work of present embodiment, pot cover 3 and outer pot 1 are interlocked, and form closed cavities by sealing ring 4 sealings between pot cover 3 and the interior pot 2.Connect power supply, the user selects cooking function, and manual or program automatic setting is cooked pressure, and control circuit 6 selects to adopt low pressure detection electric capacity or high pressure detection electric capacity to carry out analyzing and processing as detecting capacitance signal according to the pressure of setting.Start heating schedule, increase along with quantity of steam in the cooking process, in the pressure of

pot

2 and 3 on pot cover increase, interior pot 2 promotes heating plates 5 and produces displacements downwards, the shift transmission part 51 that is provided with on the heating plate 5 is being with movable plate electrode 73 to produce displacements downwards, away from top crown 71, near bottom crown 72, when the pressure between interior pot 2 and the pot cover 3 reduced, elastic metal sheet 9 promotes heat-generating disc 5 and interior pot 2 resets, movable plate electrode 73 is gradually away from bottom crown 72, near top crown 71.If the pressure of setting is between low-pressure area, then the capacitance signal between movable plate electrode 73 and the top crown 71 is as detection signal, on the contrary, then selects capacitance signal between movable plate electrode 73 and the bottom crown 72 as detection signal.Control circuit 1 is regulated the size of the power of heating plate 5 with control culinary art pressure by the capacitance signal output control signal of analyzing and testing.

The described electric heater unit of present embodiment is a heating plate 5, also can be heating plate or electromagnetism drum or infrared heating device etc.Described shift transmission part 51 also can be arranged on the elastic metal sheet 9, the perhaps elasticity the bottom of a pan of outer pot 1, the set-up mode of these shift transmission parts 51 is at Chinese patent CN200710153849.2, CN200710153850.5, among the CN200710153851.X all by fully open.Capacitance sensor 7 also can be arranged on the pot cover 3, by being arranged on movable plate electrode 73 actions that steam separation sleeve and steam-operating push rod promotion capacitance sensor 7 are installed in perforate on the pot cover 3, this way of propelling has had detailed description at Chinese patent CN200720158958.9, specifically can be with reference to the technical scheme of this patent.

In addition, described movable plate electrode 73 of present embodiment and

fixed plate

71,72 also can exchange, two movable plate electrodes and a fixed plate promptly are set, fixed plate is arranged between two movable plate electrodes, two movable plate electrode relative fixed are also fixedlyed connected with shift transmission part 51, and fixed plate is fixedlyed connected with outer pot 1 with mounting bracket 8 by sensor outer housing.This mounting means can make capacitance sensor 7 produce the capacitance signal of two variations equally, reaches the pressure control requirement, realizes the utility model purpose.The power of the electric heater unit that this enforcement provides also can be 850W or 3500W.

Embodiment two:

As Fig. 3, a kind of follow-on electric pressure cooking saucepan shown in Figure 4, basic identical with embodiment one application structure, difference is that three capacitor plates of described combined type capacitance sensor comprise movable plate electrode 73, bottom crown 72 and elasticity pole plate 74.Movable plate electrode 73 is fixedlyed connected with the displacement touch part 51 on being arranged on heating plate 5, and bottom crown 72 is a fixed polar plate, is installed on the sensor outer housing, and sensor outer housing is fixedlyed connected with support 8, and support 8 is fixedly mounted on the outer pot 1.Be arranged between movable plate electrode 73 and the bottom crown 72 at elasticity pole plate 74, form low pressure between elasticity pole plate 74 and the movable plate electrode 73 and detect electric capacity, form high pressure between elasticity pole plate 74 and the bottom crown 72 and detect electric capacity.Along with the increase of culinary art pressure, interior pot 2 promotes heating plates 5 and moves down, and movable plate electrode 73 is gradually near elasticity pole plate 74, touch elasticity pole plate 74 after, movable plate electrode 73 promotes elasticity pole plates 74 and moves downward together, moves closer to bottom crown 72; In movable plate electrode 73 motion processes, successively detect electric capacity and high pressure and detect and export the heating power that a control signal is regulated heating plate 5 again after dealing with analysis in the capacitance signal input control circuit 6 that produces a variation between the electric capacity in low pressure.

Be provided with spring 10 between described elasticity pole plate 74 and the bottom crown 72, make elasticity pole plate 74 be the elasticity setting.The upper end of elasticity pole plate 74 is against on the locating piece 11 that is provided with on the sensor outer housing, and elasticity pole plate 74 and bottom crown 72 are maintained a certain distance at initial position.Described movable plate electrode 73 is fixedlyed connected with shift transmission part 51, its outside dimension is less than the internal diameter size of locating piece 11, make movable plate electrode 73 when pressure increases, move down to promote elasticity pole plate 74 after a section moves and continue to move down, make elasticity pole plate 74 near bottom crown 72.When culinary art pressure reduces gradually, heating plate 5 resets under the effect of elastic metal sheet 9, elasticity pole plate 74 moves upward under the effect of spring 10, gradually away from bottom crown 72, after elasticity pole plate 74 was against on the locating piece 11, elasticity pole plate 74 stopped to move, and the distance between movable plate electrode 73 and the elasticity pole plate 74 increases gradually, disappear movable plate electrode 73 stop motions until pressure.

In addition, the foregoing description only limits to produce the situation of the capacitance signal of two variations, in the reality, also can do slightly to change and to produce three detection capacitance signals this structure, for example capacitance sensor 7 comprises four capacitor plates, two fixed plate (top crowns 71, bottom crown 72), a movable plate electrode 73 and an elasticity pole plate 74, movable plate electrode 73 is arranged between two fixed plates (top crown 71, bottom crown 72), and elasticity pole plate 74 is arranged between movable plate electrode 73 and the bottom crown 72, be provided with spring 11 between elasticity pole plate 7 and the bottom crown 72, in the course of work, form low pressure between movable plate electrode 73 and the top crown 71 and detect electric capacity, press in forming between movable plate electrode 73 and the elasticity pole plate 74 and detect electric capacity, form high pressure between elasticity pole plate 74 and the bottom crown 72 and detect electric capacity, this structure can realize goal of the invention equally.

Claims

1, a kind of follow-on electric pressure cooking saucepan comprises the control circuit of the pot cover and the sealing ring of pot in outer pot, interior pot, the sealing, the electric heater unit that is arranged on interior pot bottom, the described electric heater unit work of control and changes the shift transmission part that produces change in displacement with culinary art pressure; Described control circuit comprises the capacitance sensor that detects the variation of culinary art pressure; Described shift transmission part can drive the capacitance sensor action, and it is characterized in that: described capacitance sensor is the combined type capacitance sensor that is provided with three capacitor plates; Can produce the variation capacitance signal of two detection electric pressure cooking saucepan pressure states between described three capacitor plates; The power of described electric heater unit is that 100W is to 3500W.

2, a kind of follow-on electric pressure cooking saucepan according to claim 1 is characterized in that described three capacitor plates comprise two movable plate electrodes and are arranged on two fixed plates between the movable plate electrode; Relative fixed between described two movable plate electrodes, described movable plate electrode is connected with shift transmission part.

3, a kind of follow-on electric pressure cooking saucepan according to claim 1 is characterized in that described three capacitor plates comprise two fixed plates and are arranged on two movable plate electrodes between the fixed plate, and described movable plate electrode is connected with shift transmission part.

4, a kind of follow-on electric pressure cooking saucepan according to claim 1, it is characterized in that described three capacitor plates comprise a movable plate electrode, a fixed plate and be arranged on movable plate electrode and fixed plate between the elasticity pole plate, described movable plate electrode is connected with shift transmission part.

5, a kind of follow-on electric pressure cooking saucepan according to claim 1 is characterized in that described combined type capacitance sensor is placed in outer pot bottom.

6, a kind of follow-on electric pressure cooking saucepan according to claim 1 is characterized in that described combined type capacitance sensor is placed in pot cover top.