The pressure cooking device of safe unloading pressure
Technical field
The utility model relates to a kind of pressure cooking device of safe unloading pressure, belongs to the improvement technology of pressure cooking device.
Background technology
Existing pressure cooking device is for ensureing user's safety, a variety of safety measures have been taked, sealing ring promptly is wherein a kind of: under service pressure, the sealing ring outside, ring limit down fits tightly with interior pot edge, make sealing in the container, when pressure surpassed normal pressure, sealing ring encircled the limit down under pressure to turning up, under encircle that the limit is inboard to be contacted with interior pot edge, make the container inner pressure eliminating.But this structure is when getting rid of pressure, and high-temperature high-pressure air flow sprays rapidly around sealing ring, easily near user is damaged.
Chinese patent ZL95234112.3 discloses a kind of not quick-fried safe pressure cooker, have the elongated hole that the sealing ring overvoltage ejects on the pot cover outer rim, pot edge on one's body has the relief port corresponding with elongated hole, during the abnormal pressure state, sealing ring ejects elongated hole extruding under the overvoltage effect a bit of outside taking the dish out of the pot, steam is discharged from following relief port, reaches the explosion-proof purpose of release.Though the technology of above-mentioned patent disclosure has reached the directed purpose of getting rid of of steam, pushes repeatedly between sealing ring and the elongated hole, produces very strong frictional force, very easily causes damage.
The utility model content
The purpose of this utility model be to provide a kind of safe and reliable, noise is little, the pressure cooking device of durable and non-damageable safe unloading pressure.
Pressure cooking device by a kind of safe unloading pressure of this purpose design: comprise body, interior pot, lid and sealing ring, the ring limit of going up of sealing ring is installed in and covers, and following ring limit cooperates with interior pot of pot edge, encircles the limit under wherein above-mentioned and comprises intensity smaller portions and intensity major part.
The height of above-mentioned ring down limit intensity major part is greater than the height of intensity smaller portions.
The thickness of above-mentioned intensity smaller portions is less than the thickness of intensity major part.
The outward flange of above-mentioned intensity smaller portions is a corrugated.
The medial surface of above-mentioned intensity smaller portions is provided with salient point, fin, concave point, groove or ripple.
The pot edge of the corresponding ring limit down of pot intensity smaller portions is provided with salient point, fin, concave point, groove or ripple in above-mentioned.
Above-mentioned ring down limit intensity smaller portions are arranged on position, pressure cooking device body back.
The utility model is owing to the intensity that sealing ring encircles the limit down there are differences, when container inner pressure is unusual, pressure is broken through sealing ring intensity smaller portions earlier, make air-flow fixing from a direction discharge, avoid people, thing around the container are damaged, in addition, the non-shiny surface of air-flow discharge place then can effectively reduce the speed and the noise of air-flow.
The utility model and prior art than its beneficial effect are: safe and reliable, noise is low, and is durable and not fragile.
Description of drawings
Fig. 1 is the structure cutaway view of embodiment 1 of the present utility model;
Fig. 2 is the sealing ring schematic diagram among the embodiment 1 of the present utility model;
Fig. 3 is the structure cutaway view of the sealing ring among Fig. 2;
Fig. 4 is the partial enlarged drawing at A place among Fig. 3;
Fig. 5 is the partial enlarged drawing at B place among Fig. 3;
Fig. 6 is the state diagram under embodiment 1 normal pressure of the present utility model, not shown uncorrelated part;
Fig. 7 is the state diagram of exhaust under embodiment 1 abnormal pressure of the present utility model, not shown uncorrelated part;
Fig. 8 is the schematic diagram of the sealing ring of embodiment 2 of the present utility model;
Fig. 9 is the structure cutaway view of the sealing ring among Fig. 8;
Figure 10 is the C place partial enlarged drawing among Fig. 9;
Figure 11 is the D place partial enlarged drawing among Fig. 9.
The specific embodiment
Embodiment 1:
Show as Fig. 1~7, the pressure cooking device of present embodiment safe unloading pressure comprises body 1, interior pot 2, lid 3 and sealing ring 4, interior pot 2 places in the body 1, lid 3 places on body 1 and the interior pot 2, lid 3 is provided with operating pressure adjusting device 31, sealing ring 4 place cover 3 and interior pot 2 between, cavity between seal cover 3 and the interior pot 2, wherein sealing ring 4 comprises ring limit 41 and encircles limit 42 down, last ring limit 41 and lid 3 assemblings, under encircle limit 42 and interior pot 2 pot edges are inboard cooperates, under encircle limit 42 and be divided into intensity smaller portions 42A and intensity major part 42B along circumference, encircle the height LA that limit intensity major part 42B height LB is a bit larger tham intensity smaller portions 42A down, and the medial surface of intensity smaller portions 42A is non-shiny surface, the place of keeping to the side is provided with some salient points 43.
Under the service pressure, following 42 outsides, ring limit and interior pot inboard, 2 pot edge fit tightly, and form seal cavity in the container, and container is adjusted in container inner pressure in the normal range (NR) by operating pressure adjusting device 31, shows as Fig. 6; When pressure-regulating device 31 takes place unusual, during the pressure overrun, container inner pressure is at first broken through sealing ring intensity smaller portions 42A, overturn in the ring limit, inboard and interior pot 2 pot edge upsides contact, and under the support of salient point 43, sealing ring encircles limit 42A down and interior pot 2 pot edges can not seal fully, high pressure high temperature vapor in the container is got rid of between the space, shows as Fig. 7.The speed that salient point 43 can not only make air-flow get rid of is slowed down, noise reduces, and the pressure in the container is got rid of as far as possible fully, when elimination is uncapped because of the pressure eliminating not exclusively produces the user is damaged.
In the present embodiment, sealing ring down in the ring limit intensity smaller portions 42A preferably be arranged on and the most difficult the user produced dangerous direction, i.e. position, pressure cooking device body back.
Embodiment 2:
Show that as Fig. 8~11 sealing ring is divided into intensity smaller portions 42A and intensity major part 42B along circumference in ring limit 42 down in the pressure cooking device of present embodiment safe unloading pressure, the thickness HB of the thickness HA specific strength major part 42B of intensity smaller portions 42A is thin.Other structures no longer describe in detail with embodiment 1.