CN1050039C

CN1050039C - Diaphragm-type cooker lid and threaded electric cooker

Info

Publication number: CN1050039C
Application number: CN97100738A
Authority: CN
Inventors: 王永光
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-02-27
Filing date: 1997-02-27
Publication date: 2000-03-08
Anticipated expiration: 2017-02-27
Also published as: CN1160977A

Abstract

The present invention belongs to electric heating pressure cooking utensils in small electric appliances for kitchens. The present invention achieves the self pressure relieving function by using the match of the elastic displacement of a diaphragm type cooker cover, a pressure relieving slot on an inner cooker, etc., and ensures that the cover is closed safely to the right position through a cover opening and closing structure in a screw thread screwing type; the elastic displacement of the screw thread is used for driving a two-dimensional automatic control system to achieve the closed-loop control of the pressure in the cooker and the automatic control of the cooking time; simultaneously, the present invention has the characteristic of easy operation of unidimensional selection; by matching the arrangement of a sealing disc valve with constant temperature, the multifunctional electric cooker adopting boiling point crossing cooking only needs a function selection button and has excellent function widening and simple operation.

Description

Diaphragm type pot cover and threaded electric cooker

The invention belongs to the hot electric pressing pressure cooking apparatus in the small household appliances for kitchen use.

The product of hot electric pressing pressure cooking apparatus and patented technology, with Chinese patent ZL91100026.7 number be representative, development in recent years is very fast, the hot electric pressing pressure cooking apparatus of other type is gradually withdrawn from the market.In addition, do not see other as yet for information about.

The objective of the invention is on the basis of existing hot electric pressing pressure cooking apparatus, a kind of more rational electric cooker version is proposed, it comprises: the diaphragm type pressure cooker cover that utilizes roll coil of strip limit to turn over tooth drives gas pressure relief slot ad hoc on sealing ring and the pot edge and cooperates, realization can not block up from the pressure release secured fashion; Utilize the elastic displacement of cantilevered pot tooth to drive an end of two-dimentional control device, the mechanical cooking process that cooperates the electrodynamic type time controller to drive is imported the other end of two-dimentional control device, forms the two-dimentional automatic control system of pot inner pressure history; Propose to form threaded closing and opening cover during booting mode, solve closing and opening cover during booting pressure security problem not in place with little lift angle formula lid tooth and pot tooth; Also comprise and utilize the constant temperature sealing device to determine pot inner pressure and functional relationship of temperature starting point.So that realize utilizing the diaphragm type pot cover from pressure release not only economy but also higher accuracy is arranged; Utilize cantilevered elasticity pot tooth to combine the electromechanical integration characteristics that have more with electrodynamic type two dimension automatic control system; With the closing and opening cover during booting secured fashion of the lid body of little lift angle formula and pot tooth not only reliably but also economical; Seal with constant temperature and to realize striding boiling point culinary art and bring new culinary art characteristic again.

The present invention proposes to utilize hanging ring ring fixing on the diaphragm type pot cover, with the sealing ring sealing and fixing on pot cover, when the stressed generation of diaphragm type pot cover during to top offset, the lip eaves and the gas pressure relief slot on the interior pot edge that drive sealing ring produce relative displacement, can control this relative displacement by well-designed diaphragm type pot cover, realize that electric cooker is in sealing state at the lip eaves of normal pressure lower seal and the gas pressure relief slot on the interior pot edge, and produce pressure release slit, the unnecessary pressure of releasing at sealing ring lip eaves and gas pressure relief slot place during superpressure for some reason when electric cooker.This displacement because of superpressure produces the pressure release slit, and return is eliminated the process in pressure release slit after the pressure release, can produce at place, pressure release slit the vibration block clearing effect, the superpressure after the pressure release slit is blocked can make displacement produce bigger slit again.So in fact this pressure release mode has can not blocking up property.

In the present invention, the pot edge of interior pot be block set on the pot edge of outer pot, and the upper surface and the lower surface in the interior the bottom of a pan of fixing electric hot tray on the bottom of a pan outside have the epirelief shape of unanimity.The structural similarity of this and existing electric cooker, difference has on interior pot edge some gas pressure relief slots, and interior pot edge is a block set outside on the pot edge, and the pressure overwhelming majority during interior pot work is passed to outer pot by interior pot edge.The below of pot edge is being welded pot tooth coil admittedly outside, inwardly turning over six of system on six pot teeth that extended to horizontal direction by pot tooth coil upper end and the pot cover covers teeth and screws togather after screwing, this structure is similar to commercially available pressure cooker, its difference is: for improving the lid tooth intensity of thin-walled pot cover, employing with the pot cover crimping after, be with crimping to the inside the horizontal direction system of turning over cover tooth, be formed with the stressed support of tubular edge in the two edges of covering tooth; And pot tooth coil is to select for use the good stainless steel material of elasticity to make, the level pot tooth of the system of turning over has long cantilever, and after the material of selecting the pot tooth meticulously, thickness, physical dimension, pass to (pressures) power in the pot of pot tooth via interior pot edge, outer pot edge, pot tooth coil, can make pot tooth produce the needed displacement of driving automatic control system.As seen, closed the lid sealing except that bearing by the elastic cantilever formula pot tooth of horizontal direction, its elastic displacement and pot inner pressure are stable functional relation, with this displacement drive automatic control system, make electric cooker have higher electromechanical integration level.According to the automatic control requirement of culinary art to pot inner pressure (temperature) history, the present invention proposes to drive with the displacement of elasticity pot tooth far-end an end of two-dimentional switching device, take turns another input of controlling two-dimentional switching device with the cooking process that electrodynamic timer drives, finish the two dimension control automatically of pot inner pressure (temperature) history, selected cooking process wheel (it is selected to be both the main shaft angle) in the time of simultaneously by electronic timer seclected time (the main shaft angle is selected), realize the one dimension selection of two dimension control, realize promptly that also the culinary art duration and degree of heating (temperature, time) of electric cooker is selected.

The present invention proposes little lift angle formula pot tooth and screws togather the revolving type closing and opening cover during booting mode of formula with the lid tooth, solves electric cooker and closes lid pot inner pressure and pot tooth when not in place, covers the contradiction of tooth between stressed.Know from aforementioned: a maximum pressure value is by pressure release value decision in the pot, and the pressure release value is that distance abbreviation pressure release by end line under the gas pressure relief slot on end line and the interior pot edge under the sealing ring lip eaves is apart from decision.Utilization is the lid tooth and pot tooth of little lift angle design, vertical height when along continuous straight runs screws is called for short tooth apart from diminishing feature, make to have only when a lid tooth and a pot tooth to screw togather the tooth distance that puts in place when equalling zero, the pressure release value of design just can make electric cooker obtain maximum working pressure; Obviously, the present invention proposes to limit with the pressure release value feature of pot interior maximum working pressure, introduce little lift angle lid tooth, a pot tooth screw togather the feature of tooth distance is arranged when not in place after, make and to close the tooth of lid when not in place apart from making pressure release apart from minimizing, thereby reduce the pressure release value effectively, guarantee to close the pressure security performance of lid when not in place.Based on culinary art practice demand and factor such as easy to use, the present invention adopts the constant temperature seal valve to determine the relation of pot inner pressure and temperature, facts have proved: when pot inner pressure was 0～100kpa, its temperature range was to declare in the time of 95～115 ℃.The temperature sensor of available butterfly shaped dual metal sheet formula is made the seal butterfly valve that the constant temperature bow turns over formula, is arranged on the pot cover to get final product.

The present invention proposes the diaphragm type pot cover, and by the hanging ring ring with the sealing ring fixing seal on pot cover, finish the function of over-pressure self-discharging.Given full play to the advantage of Stainless steel pot cover, to improving the pressure release sensitivity positive effect that reduced cost.The utilization that particularly cooperates pressure release to propose has identical little lift angle lid tooth and the tooth of pot tooth in closing the process of lid apart from reducing the pressure release value, realizes closing the lid safety that puts in place, becomes put in place the most simple and reliable scheme of safety device of pressure cooker pressure security, He Gai.Utilize an input of the cooking process wheel drive two dimension switching device that the timing axle of electronic timer drives, drive another input of two-dimentional switching device with the displacement that is the pot tooth of functional relation with pot inner pressure, realize the two dimension control automatically of pot inner pressure history, realized the one dimension selection simultaneously.The fuzzy control of this non-electronization is finished two dimension automatically during control, owing to adopted the pot tooth to drive to make structure more become rationally and dwindled error; And in appearance design, button (being the electronic timing axle of deciding electrical equipment) is selected in culinary art, and the leeway of upper and lower settings has also been arranged on setting height(from bottom).The present invention introduces the constant temperature seal valve and substitutes at present extensively selected level pressure seal valve, save the culinary art warm area that is of little use, save the choosing temperature button of a needs operation, also reduce the trouble of cleaning spool, it is all multi-functional but have only a button to have realized that electric cooker has, and only need dial the function that just can finish electric cooker and select.

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

Fig. 1 is an electric cooker embodiment schematic diagram.

Fig. 2 is a pot tooth partial schematic diagram.

7. pressure releases of 1. pot covers, 2. lid teeth, 3. hanging ring rings, 4. sealing rings, 5. interior pot 6. gas pressure relief slots are apart from h 8. outer pots 9. pot tooth coils among the figure

10. pot tooth 11. electric hot traies 12. constant temperature dish valves 13. temperature-sensitive dish 14. valve seats 15. spools 16. power framves 17. two-dimentional switching devices

18. fixed contact sheet 19. elastic cantilevers 20. center cantilever 21. movable contacts 22. energy-stored springs 23. timer 2s 4. are axle regularly

25. deceleration train 26. synchronous motors 27. are selected button.

For making the drawing brief introduction, the lift angle that will not cover tooth and pot tooth illustrates in Fig. 1, and with omissions such as shell, support, handles.Fig. 2 is the principle schematic of two-dimentional automatic control system of the bottom of the outside that is fixed on outer pot 8, pot tooth 10.

The present invention in force, with interior pot bore 19cm is example, still adopt six common tooth systems to screw the closing and opening cover during booting mode, pot cover 1 is the good corrosion resistant plate stretch forming of elasticity of selecting thickness 0.5～0.6mm for use, periphery is being with the inside horizontal direction of crimping to turn over behind the crimping to make six lid teeth 2, lid tooth 2 from outside entad look to be a left side low right high, its lift angle α selects about 5 °, the maximum gauge of pot cover 1 is about 24cm, and its edge waviness also is to rely on die drawn to be shaped.Hanging ring ring 3 is to be welded in the working diameter of pot cover 1 after making with the corrosion resistant plate of thickness 0.3～0.5mm admittedly by central side.Sealing ring 4 is to make with high quality silicon rubber.The selected of the physical dimension of hanging ring ring 3 and sealing ring 4 and position should have good linear sealing and movable sealing characteristic to be as the criterion to guarantee pot cover 1 and interior pot 5, and it is in order to obtain bigger displacement by the purpose of central side that the position of hanging ring ring 3 is arranged on working diameter.Interior pot 5 is the fine aluminum plate stretching shapings with thickness 2mm, can increase ironing technology for saving material, the pot edge of interior pot 5 is by the wide gas pressure relief slot 6 of central side punching out 8～10mm, its depth dimensions, should determine that the quantity of gas pressure relief slot 6 can select for use 24 grooves uniform along girth according to the actual displacement amount of pot cover under the rated operating pressure 1, pot tooth 10.The cold-rolled steel sheet stretch forming of the thick 0.5mm of outer pot 8 usefulness, its pot edge volume loop diameter is selected in about 5mm, the upper surface of outer pot 8 pot edges should with the outside pressing of gas pressure relief slot 6 on interior pot 5 pot edges so that bear pot interior (pressure) power.The good corrosion resistant plate of elasticity about the thick 0.8mm of pot tooth coil 9 usefulness is made, and is the low right high six line screw-type pot teeth 10 that are equivalent in a left side to six side views of horizontal direction punching out, and its lift angle α chooses about 5 ° and be consistent with lid tooth 2 lift angles.The elastic displacement of pot tooth 10 should be able to guarantee that (be generally selected in 0～100kpa), the displacement of two-dimentional switching device 17 center cantilever 20 is wanted in the robot control system(RCS) in institute's governor pressure scope.Pot tooth 10 should be able to satisfy at 0～100kpa scope (the total stressed sum of pot tooth 10 is at 283kg at this moment) in force, and the displacement of 0.66mm should be arranged.Outer pot 8 should be slightly less than the height of the bottom of a pan face of interior pot 5 to gas pressure relief slot 6 bottom surfaces with the assembled height of electric hot tray 11, equals zero to guarantee the gap between electric hot tray 11 and the interior pot 5.The elastic displacement and the pressure release of pot cover 1, pot tooth 10 are as follows apart from the relation between 7 the h value three: under the 100kpa rated operating pressure, the displacement of pot cover 1 (being crimped to the separation of hanging ring ring 3 and pot cover 1 from lid tooth 2) should be about 2mm, the displacement of pot tooth 10 (with the junction of lid tooth 2 crimpings) also should be about 1mm, after getting certain safety coefficient, the h value of pressure release distance 7 is about 3mm.Obviously, of the present invention from the required displacement of pressure release function, finish jointly by pot cover 1 and pot tooth 10; If deficiency can also be pressed into membrane-like with hanging ring ring 3, and the internal diameter of hanging ring ring 3 reduced, its pad with pot cover 1 is moved to the center, this measure has the effect of getting twice the result with half the effort to the increase displacement.The effect of the constant temperature dish valve 12 among Fig. 1 is when steam temperature reaches design temperature in the pot, makes the outlet and pot external seal of spool 15 after temperature-sensitive dish 13 bows turn over, and just begins build-up pressure in the pot.The seal temperature of constant temperature dish valve 12 can be located at 95 ℃ (plains region uses).The butterfly shaped dual metal sheet of the thick 0.2mm external diameter of temperature-sensitive dish 13 usefulness 18mm is made, the corrosion resistant plate of the thick 0.3mm of valve seat 14 usefulness is made, and temperature-sensitive dish 13 is inlaid in neck on the valve seat 14, neck uniform some air vents, before temperature-sensitive dish 13 bows turn over pot in atmospheric vapour form passage through air vent.Spool 15 usefulness silicon rubber are made, and the design of its physical dimension will guarantee to cooperate with temperature-sensitive dish 13, realize that temperature-sensitive dish 13 bows turn over preceding pot of inside and outside formation and seal after the passage bow turns over.Valve seat 14 can be welded on the pot cover 1 admittedly.

The two-dimentional automatic control system of the pot inner pressure shown in Fig. 2 (temperature) history, put forth effort frame 16 tractions and insulate supporting center cantilever 20 lower surfaces of two-dimentional switching device 17 by the following solid weldering of certain displacement point on the pot tooth 10 with little lift angle, the displacement of finishing by the pot tooth 10 that characterizes pot inner pressure (temperature) is connected with the mechanics of automatic control system, obviously this connection mechanically should have micromatic setting, and should insulate on its electrical equipment, all dot power frame 16 here.Clearly indicated the structure composition of two-dimentional switching device 17 among Fig. 2, it is made up of elastic cantilever 19, center cantilever 20, movable contact arm 21, energy-stored spring 22 and fixed contact sheet 18.After it is actually and removes bimetal leaf with electric rice cooker with warmer, use the upper surface of the far-end of cooking process wheel 28 control elastic cantilevers 19 instead, and firmly the control of frame 16 and regulating replaces original insulation mechanism of recruiting.Timer 23 adopts 1 hour electrodynamic timer of the every circle of main shaft, the contact switch that is driven by synchronous motor 26 and deceleration train 25 and be serially connected in main circuit participation time control outer (all simply not drawing) in Fig. 2 also drives a cooking process wheel 28 of setting radius of curvature by cooking process at axle 24 ends regularly.Be not difficult to find out, stir the regularly selection button 27 of axle 24 outer ends, when selecting cooking time, also selected the time dependent cooking process starting point of radius of curvature of cooking process wheel 28.By Fig. 2 electric cooker being shown is to rely on movable contact arm 21 and fixed contact sheet 18 to connect that power supplys make electric hot tray 11 heating and the rising pot inner pressure, pot inner pressure exceed in a single day that cooking process wheel 28 provides by the pressure in the cooking process of time layout the time, the displacement that pot tooth 10 makes progress excess makes moving on the center cantilever 20 through power frame 16 energy-stored spring 22 is released energy, movable contact arm 21 flashes and leaves fixed contact sheet 18, and the pot inner pressure of cutting off the electricity supply stops to rise.By this flash switch high displacement sensitivity is arranged, treat that pot inner pressure drops to certain when a bit, pot tooth 10 produces to bottom offset and discharges center arm 20 through power frame 16, connects movable contact arm 21 and fixed contact sheets 18 through energy-stored spring 22 again ...To sum up state the closed-loop control that the present invention adopts pot inner pressure, by the pot inner pressure variation displacement of pot tooth 10 is changed, finish the lower surface traction or the release of the center cantilever 20 of 10 pairs of two-dimentional switching devices 17 of pot tooth by power frame 16, drive two-dimentional switching device 17, realize that the closed loop of pot inner pressure is controlled automatically.Simultaneously, the far-end upper surface of the elastic cantilever 19 of two-dimentional switching device 17 is controlled jointly by cooking process wheel 28, time shaft 24, finally becomes the closed-loop control of the pot inner pressure of programming in time.Obviously, this is the two dimension control automatically of pot inner pressure (temperature), time, also is usually said duration and degree of heating control.Also selected the starting point of cooking process wheel 28 in the axle 24 in seclected time owing to select button 27, this button 27, time shaft 24, the cooking process will selected taken turns the coaxial design of 28 threes, is two dimension to be controlled automatically be simplified to the ingenious part place that one dimension is selected.

Claims

1. a pot cover and interior pot are sealed by sealing ring, pot cover realizes that with outer pot elasticity is connected, and by the electric cooker of pot bottom in the electric hot tray on the outer the bottom of a pan heating, be to drive flexible member control flash switch by pot inner pressure to make pot in the electric hot tray heating, the realization pot inner pressure is controlled automatically, and establish the electric cooker of pressure and temperature relation by vent valve, its feature also comprises:

By the working diameter that is fixed on diaphragm type pot cover [1] by the hanging ring ring [3] of central side with sealing ring [4] sealing and fixing on diaphragm type pot cover [1], and lip eaves and interior pot [5] formation linear sealing by sealing ring [4]; In the pot edge of pot [5] be block set on the pot edge of outer pot [8], between the bottom of the bottom of outer pot [8] and interior pot [5], electric hot tray [11] is arranged; The top cover of outer pot [8] is welding pot tooth coil [9], realizes that by pot tooth [10] on the pot tooth coil [9] and the lid tooth [2] on the pot cover [1] revolving type elasticity is connected; Make the following end line that makes the lip eaves of sealing ring [4] exceed some gas pressure relief slots [6] on interior pot [5] pot edge by the displacement that makes progress during superpressure in the pot produce the slit pressure release jointly by diaphragm type pot cover [1] and elasticity pot tooth [10];

Fixing power frame [16] on certain displacement point below the elasticity pot tooth [10] that characterizes pot inner pressure, draw or discharge input one center cantilever [20] of two-dimentional switching device [17], make movable contact arm [21] and fixed contact sheet [18] disconnect or connect the power supply of electric hot tray [11] through energy-stored spring [22], realize the closed-loop control of pot inner pressure; Controlling another input one elastic cantilever [19] of two-dimentional switching device [17] and the far-end of movable contact arm [21] by the cooking process wheel [28] that the timing axle [24] of electrodynamic timer [23] drives, make movable contact arm [21] and fixed contact sheet [18] be switched on or switched off the power supply of electric hot tray [11] through energy-stored spring [22], realize automatic control by the pot inner pressure history of setting cooking process; By the selection button [27] on the timing axle [24] of electronic timer [23], selected regularly axle [24] and terminal cooking process thereof are taken turns the starting point of [28], realize the once selected of pot inner pressure history;

By a lid tooth [2] with identical little lift angle and the threaded closing and opening cover during booting mode formed of pot tooth [10], the some gas pressure relief slots [6] in cooperating on the pot [5] cover the unnecessary pressure of releasing in advance when not in place and guarantee safety closing;

Temperature-sensitive dish of making by bimetal leaf [13] and valve seat [14], spool [15], the constant temperature dish valve of forming [12], the temperature when determining initial pressure in the pot.