CN103598810A - Bistable safety device of pressure cooker - Google Patents
Bistable safety device of pressure cooker Download PDFInfo
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- CN103598810A CN103598810A CN201310546251.5A CN201310546251A CN103598810A CN 103598810 A CN103598810 A CN 103598810A CN 201310546251 A CN201310546251 A CN 201310546251A CN 103598810 A CN103598810 A CN 103598810A
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Abstract
A bistable safety device of a pressure cooker comprises a cylinder, a piston, bistable elastic devices and an air guide hole. A plurality of pressure relief holes are formed in the wall of the cylinder. The piston is in hermetic seal with the cylinder. The bistable elastic devices are fixedly connected with the piston and the cylinder. In a normal state, the piston seals the pressure relief holes; under pressure, the piston moves upwards, and the pressure relief holes are communicated with the inside of the cooker. The air guide hole is formed in a top cover of the cylinder or in the wall of the upper portion of the cylinder. Through the structure, when the pressure in the cooker exceeds set pressure, the bistable elastic devices move, then the piston moves, and further the pressure relief holes are communicated with the inside of the cooker to relieve the pressure; after the pressure is relived, the piston seals the pressure relief holes again; the bistable safety device is safe and reliable.
Description
Technical field
the present invention relates to the safety device that electric pressure cooking saucepan is used.
Background technology
currently available technology, a kind of electric pressure cooking saucepan comprises that outer pot, interior pot, pot cover are arranged on the pressure sensor on pot cover.Existing problems are: in the situation that pressure sensor is ineffective, effectively pressure release, exists potential safety hazard.
Summary of the invention
the object of the invention is: a kind of bistable state safety device of pressure cooker is provided, and it can be in the situation that pressure sensing be ineffective, and pressure release eliminates safe hidden trouble.
the present invention is achieved in that a kind of bistable state safety device of pressure cooker, and its special character is: it comprises cylinder barrel, piston and bistable state elastic device,
described cylinder barrel wall has several relief holes, described piston and the hermetic seal of cylinder barrel liquid, and described bistable state elastic device is fixedly connected with cylinder barrel with piston; Under normal conditions, piston closes relief hole; While having pressure, piston moves up, and relief hole is connected with in pot; Described cylinder barrel has upper and lower opening or cylinder barrel has under shed, on its top cover, gas port is set; Or gas port is arranged on the wall on cylinder barrel top;
or the inner wall of cylinder of the axial bottom of described cylinder barrel is provided with several relief holes, is axially provided with several axial air slots in the inner wall of cylinder on top, described cylinder barrel has upper and lower opening or cylinder barrel has under shed, on its top cover, gas port is set; The inwall liquid hermetic seal of described piston and the axial bottom of cylinder barrel, described bistable state elastic device is fixedly connected with cylinder barrel with piston; Under normal conditions, piston closes relief hole; While having pressure, piston moves up, and relief hole is connected with in pot;
or being provided with several axial gas pressure relief slots in the axial first half inner wall of cylinder of described cylinder barrel, cylinder barrel has upper and lower opening, or cylinder barrel has under shed, on its top cover, gas port is set; Under normal conditions, the inner wall of cylinder liquid hermetic seal of described piston and the axial Lower Half of cylinder barrel, described bistable state elastic device is fixedly connected with cylinder barrel with piston; While having pressure, piston moves up, and the lower end of piston surmounts the intersection of the upper Lower Half of cylinder barrel, and gas pressure relief slot communicates with in pot;
or described piston has the cavity of under shed, on cavity wall, there is relief hole; Described cylinder barrel has upper and lower opening, or has under shed, its top cover tool gas port; The diameter that has of the upper end of described cylinder barrel is greater than the pressure-releasing chamber of cylinder barrel diameter; Under normal conditions, described piston and the hermetic seal of inner wall of cylinder liquid, described bistable state elastic device is fixedly connected with cylinder barrel with piston; While having pressure, piston moves up, and the relief hole on piston surmounts the upper end of cylinder barrel and communicates with pressure-releasing chamber.
the bistable state safety device of described a kind of pressure cooker, its special character is: described bistable state elastic device is arranged on the cylinder barrel of bottom of piston and is fixedly connected with the lower end of cylinder barrel.
the bistable state safety device of described a kind of pressure cooker, its special character is: also comprise a compression spring, the lower end of described compression spring is fixedly connected with the top of piston, upper end is fixedly connected with top cover.
the bistable state safety device of described a kind of pressure cooker, its special character is: described bistable state elastic device is arranged on the top of piston and is fixedly connected with the upper end of cylinder barrel.
the bistable state safety device of described a kind of pressure cooker, its special character is: bistable state elastic device comprises an arc elastic sheet metal and a connecting rod, the two ends of arc elastic sheet metal are fixedly connected with the lower end of cylinder barrel, and the lower end of described connecting rod is fixedly connected with the center of arc elastic sheet metal, upper end is fixedly connected with piston; Described arc elastic sheet metal is opening up;
or described bistable state elastic device comprises two arc elastic sheet metals and a connecting rod, two arc elastic sheet metals are cross setting, and the arc elastic sheet metal intersection, lower end of described connecting rod is fixedly connected with, upper end is fixedly connected with piston; Described arc elastic sheet metal is opening up.
the bistable state safety device of described a kind of pressure cooker, its special character is: described bistable state elastic device comprises an end annulus seat, arc chip elastic metallic muscle and connecting rod,
arc chip elastic metallic muscle one end is fixedly connected with end annulus seat, the other end intersects and be fixedly connected with end annulus seat, one-body molded the making of arc chip elastic metallic muscle;
the upper end of described connecting rod is fixedly connected with piston, lower end is fixedly connected with arc chip elastic metallic muscle intersection, and end annulus seat is fixedly connected with the lower end of cylinder barrel, and arc chip elastic metallic muscle intersection is positioned at the below of end annulus seat.
the bistable state safety device of described a kind of pressure cooker, its special character is: bistable state elastic device comprises an arc elastic sheet metal and a connecting rod, the two ends of arc elastic sheet metal are fixedly connected with the upper end of cylinder barrel, and the upper end of described connecting rod is fixedly connected with the center of arc elastic sheet metal, lower end is fixedly connected with piston; Described arc elastic sheet metal is opening up;
or described bistable state elastic device comprises two arc elastic sheet metals and a connecting rod, two arc elastic sheet metals are cross setting, and described small end arc elastic sheet metal intersection is fixedly connected with, lower end is fixedly connected with piston; Described arc elastic sheet metal is opening up.
the bistable state safety device of described a kind of pressure cooker, its special character is: described bistable state elastic device comprises an end annulus seat, arc chip elastic metallic muscle and connecting rod,
arc chip elastic metallic muscle one end is fixedly connected with end annulus seat, the other end intersects and be fixedly connected with end annulus seat, one-body molded the making of arc chip elastic metallic muscle;
the lower end of described connecting rod is fixedly connected with piston, upper end is fixedly connected with arc chip elastic metallic muscle intersection, and end annulus seat is fixedly connected with the upper end of cylinder barrel, and arc chip elastic metallic muscle intersection is positioned at the below of end annulus seat.
the bistable state safety device of described a kind of pressure cooker, its special character is: also comprise a bistable state elastic device, described bistable state elastic device comprises an arc elastic sheet metal and a connecting rod, the two ends of arc elastic sheet metal are fixedly connected with the lower end of cylinder barrel, and the lower end of described connecting rod is fixedly connected with the center of arc elastic sheet metal, upper end is fixedly connected with piston; Described arc elastic sheet metal is opening up;
or described bistable state elastic device comprises two arc elastic sheet metals and a connecting rod, two arc elastic sheet metals are cross setting, and arc elastic sheet metal intersection, described connecting rod one end is fixedly connected with, the other end is fixedly connected with piston; Described arc elastic sheet metal is opening down.
the bistable state safety device of described a kind of pressure cooker, its special character is: also comprise a bistable state elastic device, described bistable state elastic device comprises an end annulus seat, arc chip elastic metallic muscle and connecting rod,
arc chip elastic metallic muscle one end is fixedly connected with end annulus seat, the other end intersects and be fixedly connected with end annulus seat, one-body molded the making of arc chip elastic metallic muscle;
described connecting rod one end is fixedly connected with piston, the other end is fixedly connected with arc chip elastic metallic muscle intersection, and end annulus seat is fixedly connected with the lower end of cylinder barrel, and arc chip elastic metallic muscle intersection is positioned at the below of end annulus seat.
a bistable state safety device for pressure cooker, its special character is: it comprises cylinder barrel, piston, elastic seal ring and bistable state elastic device,
described piston has the cavity of a under shed, has radial guiding pore on cavity wall, and annular pressing plate is arranged at the top of piston; Described cylinder barrel has upper and lower opening;
described elastic seal ring is fixed on the upper end of cylinder barrel or is fixed on pressing plate, piston and the hermetic seal of cylinder barrel liquid or matched in clearance; Bistable state elastic device is fixed on the lower end of cylinder barrel, and bistable state elastic device and piston are solidly connected; After bistable state elastic device action, and the pressure release relative with gap between pressing plate and elastic seal ring of radial guiding pore, or and the pressure release relative with gap between elastic seal ring and cylinder barrel upper end of radial guiding pore.
the bistable state safety device of described a kind of pressure cooker, its special character is: described bistable state elastic device, described bistable state elastic device comprises an end annulus seat, arc chip elastic metallic muscle and connecting rod,
arc chip elastic metallic muscle one end is fixedly connected with end annulus seat, the other end intersects and be fixedly connected with end annulus seat, one-body molded the making of arc chip elastic metallic muscle;
described connecting rod one end is fixedly connected with piston, the other end is fixedly connected with arc chip elastic metallic muscle intersection, and end annulus seat is fixedly connected with the lower end of cylinder barrel, and arc chip elastic metallic muscle intersection is positioned at the below of end annulus seat.
a bistable state safety device for pressure cooker, its special character is: it comprises cylinder barrel, piston, elastic seal ring, support and bistable state elastic device,
described piston has the cavity of a under shed, has radial guiding pore on cavity wall, and annular pressing plate is arranged at the top of piston; Described cylinder barrel has upper and lower opening;
described elastic seal ring is fixed on the upper end of cylinder barrel or is fixed on pressing plate, piston and the hermetic seal of cylinder barrel liquid or matched in clearance; Bistable state elastic device is solidly connected with the support that is arranged on cylinder barrel top, and bistable state elastic device and piston are solidly connected; After bistable state elastic device action, and the pressure release relative with gap between pressing plate and elastic seal ring of radial guiding pore, or and the pressure release relative with gap between elastic seal ring and cylinder barrel upper end of radial guiding pore.
the bistable state safety device of described a kind of pressure cooker, its special character is: described bistable state elastic device, described bistable state elastic device comprises an end annulus seat, arc chip elastic metallic muscle and connecting rod,
arc chip elastic metallic muscle one end is fixedly connected with end annulus seat, the other end intersects and be fixedly connected with end annulus seat, one-body molded the making of arc chip elastic metallic muscle;
described connecting rod one end is fixedly connected with piston, the other end is fixedly connected with arc chip elastic metallic muscle intersection, and end annulus seat is fixedly connected with support, and arc chip elastic metallic muscle intersection is positioned at the below of end annulus seat.
the bistable state safety device of a kind of pressure cooker of the present invention, owing to adopting such structure, when pot inner pressure surpasses the pressure of setting, the action of bistable state elastic device, piston moves, and relief hole communicates and pressure release with in pot; After pressure release, piston seals again relief hole; Safe and reliable.
Accompanying drawing explanation
fig. 1 is the cutaway view of the first embodiment of the present invention.
fig. 2 is the stereogram of bistable state elastic device of the present invention.
fig. 3 is the cutaway view of the second embodiment of the present invention.
fig. 4 is the cutaway view of the third embodiment of the present invention.
fig. 5 is the cutaway view of the 4th kind of embodiment of the present invention.
fig. 6 is the cutaway view of the 5th kind of embodiment of the present invention.
fig. 7 is the cutaway view of the 6th kind of embodiment of the present invention.
fig. 8 is the cutaway view of the 7th kind of embodiment of the present invention.
fig. 9 is the cutaway view of the 8th kind of embodiment of the present invention.
The specific embodiment
below in conjunction with accompanying drawing, the invention will be further described.
as shown in Figure 1, a kind of bistable state safety device of pressure cooker, it comprises cylinder barrel 1, piston 2 and bistable state elastic device 3,
described cylinder barrel 1 wall has several relief holes 11, described piston 2 and cylinder barrel 1 liquid hermetic seal, and described bistable state elastic device 3 is fixedly connected with cylinder barrel 1 with piston 2; Under normal conditions, piston 2 sealing relief holes 11; While having pressure, piston 2 moves up, and relief hole 11 is connected with in pot; The under shed of cylinder barrel 1 is arranged on pot cover and with in pot and is communicated with; Be that relief hole 11 communicates with in pot by the cylinder barrel 1 of piston 2 bottoms and the under shed of cylinder barrel 1;
the rounded distribution of described relief hole 11, cylinder barrel 1 axially on the relief hole of some groups of rounded distributions is set, prevent the relief hole 11 of axial foot, can also play the effect of pressure release.
described cylinder barrel has upper and lower opening;
or cylinder barrel has under shed, also comprise gas port 4, described gas port 4 is arranged on the top cover 5 of cylinder barrel 1, or described gas port 4 is arranged on the wall on cylinder barrel top.
described bistable state elastic device 3 is arranged on the cylinder barrel 1 of below of piston 2 and is fixedly connected with the lower end of cylinder barrel 1.
described bistable state elastic device 3 comprises an arc elastic sheet metal 31 and a connecting rod 32, the two ends of arc elastic sheet metal 31 are fixedly connected with the lower end of cylinder barrel 1, and the lower end of described connecting rod 32 is fixedly connected with arc elastic sheet metal 31 center, upper end is fixedly connected with piston 2; Described arc elastic sheet metal is opening up.Utilize the short time set characteristic of arc elastic sheet metal 31.
also can be that described bistable state elastic device 3 comprises two arc elastic sheet metals 31 and a connecting rod 32, two arc elastic sheet metals 31 are cross setting, and described connecting rod 32 arc elastic sheet metal 31 intersections, one end are fixedly connected with, the other end is fixedly connected with the lower end of piston 2; Described arc elastic sheet metal is opening up.
can also be: as shown in Figure 2, described bistable state elastic device 3 comprises an end annulus seat 33, arc chip elastic metallic muscle 34 and connecting rod 32,
arc chip elastic metallic muscle 34 one end are fixedly connected with end annulus seat 33, the other end intersects and be fixedly connected with end annulus seat 33, arc chip elastic metallic muscle 34 one-body molded making;
described connecting rod 32 one end are fixedly connected with the lower end of piston 2, the other end is fixedly connected with arc chip elastic metallic muscle 34 intersections, end annulus seat 33 is fixedly connected with the lower end of cylinder barrel 1, and arc chip elastic metallic muscle 34 intersections are positioned at the below of end annulus seat 33.
while reaching the pressure of setting in pot, arc elastic sheet metal 31 become arc elastic sheet metal 31 as shown in phantom in Figure 1 become opening down, and pressure release.Adopt bistable state elastic device 3, only have two kinds of situations to exist, seal relief hole 11, piston leaves relief hole 11 and opens in other words relief hole 11.
technical scheme described in the present embodiment, is applicable to low pressure cooker, i.e. the conventional electric cooker of people.
the another kind of embodiment of the present embodiment: also comprise a compression spring, the lower end of described compression spring is fixedly connected with the top of piston 2, upper end is fixedly connected with top cover 5.The present embodiment increases after compression spring, is applicable to pressure cooker.
as shown in Figure 3, described bistable state elastic device 3 is arranged on the top of piston 2 and is fixedly connected with the upper end of cylinder barrel 1;
bistable state elastic device 3 comprises an arc elastic sheet metal 31 and a connecting rod 32, the two ends of arc elastic sheet metal 31 are fixedly connected with the upper end of cylinder barrel 1, and the upper end of described connecting rod 32 is fixedly connected with arc elastic sheet metal 31 center, lower end is fixedly connected with piston 2; Described arc elastic sheet metal 31 is opening up.As shown in Figure 3, the two ends of arc elastic sheet metal 31, by top cover 5 and cylinder barrel 1 upper end threaded engagement, are fixed on the upper end of cylinder barrel 11.
also can be: described bistable state elastic device 3 comprises two arc elastic sheet metals 31 and a connecting rod 31, two arc elastic sheet metals 31 are cross setting, and described connecting rod 32 arc elastic sheet metal 31 intersections, upper end are fixedly connected with, lower end is fixedly connected with the upper end of piston 2; Described arc elastic sheet metal is opening up;
can also be: as shown in Figure 2, described bistable state elastic device 3 comprises an end annulus seat 33, arc chip elastic metallic muscle 34 and connecting rod 32,
arc chip elastic metallic muscle 34 one end are fixedly connected with end annulus seat 33, the other end intersects and be fixedly connected with end annulus seat 33, arc chip elastic metallic muscle 34 one-body molded making;
the lower end of described connecting rod 32 is fixedly connected with piston 2, upper end is fixedly connected with arc chip elastic metallic muscle 34 intersections, and end annulus seat 33 is fixedly connected with the upper end of cylinder barrel 1, and arc chip elastic metallic muscle 34 intersections are positioned at the below of end annulus seat 33.
as shown in Figure 4, a bistable state elastic device 3 is arranged on the top of piston 2 and is fixedly connected with the upper end of cylinder barrel 1; Another bistable state elastic device 3 is arranged on the below of piston 2 and is fixedly connected with the lower end of cylinder barrel 1;
as shown in Figure 5, cylinder barrel 1 inwall of the axial bottom of described cylinder barrel 1 is provided with several relief holes 11, axially in the inner wall of cylinder on top, is provided with several axial air slots 12, and described cylinder barrel has upper and lower opening; The inwall liquid hermetic seal of described piston 2 and cylinder barrel 1 axial bottom, described bistable state elastic device is fixedly connected with cylinder barrel 1 with piston 2; Under normal conditions, piston closes relief hole 11; While having pressure, piston 2 moves up, and relief hole 11 is connected with in pot; When relief hole 11 stops up, piston 2 continues to move up, and the lower end of piston 2 surmounts the lower end of air slot 12, and pot inner pressure, through the upper shed pressure release of air slot 12 and cylinder barrel 1, guarantees safety.
as shown in Figure 6, in the axial first half inner wall of cylinder of described cylinder barrel 1, be provided with several axial gas pressure relief slots 13, described cylinder barrel 1 has upper shed and under shed, or cylinder barrel has under shed, and gas port is set on top cover; Under normal conditions, the inner wall of cylinder liquid hermetic seal of described piston 2 and cylinder barrel 1 axial Lower Half, described bistable state elastic device is fixedly connected with cylinder barrel 1 with piston 2; While having pressure, piston 2 moves up, and the lower end of piston 2 surmounts the intersection of the upper Lower Half of cylinder barrel 1, and gas pressure relief slot 13 communicates with in pot.
as shown in Figure 7, or described piston 2 has the cavity of under shed, has relief hole 21 on cavity wall; Described cylinder barrel 1 has upper and lower opening, or has under shed, its top cover tool gas port; The diameter that has of the upper end of described cylinder barrel 1 is greater than the pressure-releasing chamber 14 of cylinder barrel diameter; Under normal conditions, described piston 2 and cylinder barrel 1 inwall liquid hermetic seal, described bistable state elastic device 3 is fixedly connected with cylinder barrel 1 with piston 2; While having pressure, piston 2 moves up, and the relief hole 21 on piston 2 surmounts the upper end of cylinder barrel 1 and communicates with pressure-releasing chamber 14, reaches the object of pressure release.
as shown in Figure 8, a kind of bistable state safety device of pressure cooker, it comprises cylinder barrel 1, piston 2, elastic seal ring 6 and bistable state elastic device 3,
described piston 2 has the cavity 22 of a under shed, on cavity 22 walls, has radial guiding pore 221, and annular pressing plate 23 is arranged at the top of piston 2; Described cylinder barrel 1 has upper and lower opening;
described elastic seal ring 6 is fixed on the upper end of cylinder barrel 1, the upper end of cylinder barrel 1 have an interface, elastic seal ring 6 lower axial end have annular slot 61, interface inserts in annular slot 61; Piston 2 coordinates with cylinder barrel 1 liquid hermetic seal; Bistable state elastic device 3 is fixed on the lower end of cylinder barrel 1, and bistable state elastic device 3 is solidly connected with piston 2; After bistable state elastic device 3 action, radial guiding pore 221 and pressure release relative with gap between pressing plate 23 and elastic seal ring 6;
also can be piston 2 and cylinder barrel 1 matched in clearance, during pressure release, pressure be through piston 2 and cylinder barrel 1 gap, radial guiding pore 221, the gap pressure release between pressing plate 23 and elastic seal ring 6.
also can be that described elastic seal ring 6 is fixed on pressing plate, piston 2 and cylinder barrel or gap; ; Or radial guiding pore and pressure release relative with gap between elastic seal ring and cylinder barrel upper end.
shown in Fig. 2, described bistable state elastic device 3 comprises an end annulus seat 33, arc chip elastic metallic muscle 34 and connecting rod 32,
arc chip elastic metallic muscle 34 one end are fixedly connected with end annulus seat 33, the other end intersects and be fixedly connected with end annulus seat 33, arc chip elastic metallic muscle 34 one-body molded making;
the upper end of described connecting rod 32 is stretched in the cavity 22 of piston 2 and is fixedly connected with piston 2, lower end is fixedly connected with arc chip elastic metallic muscle 34 intersections, end annulus seat 33 is fixedly connected with the lower end of cylinder barrel 1, and arc chip elastic metallic muscle 34 intersections are positioned at the below of end annulus seat 33.
embodiment 8
as shown in Figure 9, a kind of bistable state safety device of pressure cooker, it comprises cylinder barrel 1, piston 2, elastic seal ring 6, support 7 and bistable state elastic device 3,
described piston 2 has the cavity 22 of a under shed, on cavity 22 walls, has radial guiding pore 221, and annular pressing plate 23 is arranged at the top of piston 2; Described cylinder barrel 1 has upper and lower opening;
described elastic seal ring 6 is fixed on the upper end of cylinder barrel 1 or is fixed on pressing plate 23, piston 2 and cylinder barrel 1 liquid hermetic seal; Bistable state elastic device 3 is solidly connected with the support 7 that is arranged on cylinder barrel 1 top, and bistable state elastic device 3 is solidly connected with piston 2; After bistable state elastic device 3 action, radial guiding pore 221 and pressure release relative with gap between pressing plate 23 and elastic seal ring 6, or radial guiding pore 221 and pressure release relative with gap between elastic seal ring 6 and cylinder barrel 1 upper end.
also can be piston 2 and cylinder barrel 1 matched in clearance; Pot inner pressure is through radial guiding pore 221 and piston 2 and cylinder barrel 1 gap, then the gap between elastic seal ring and cylinder barrel upper end and pressure release; Or the gap pressure release between pressing plate 23 and elastic seal ring 6 again.
shown in Fig. 2, described bistable state elastic device 3 comprises an end annulus seat 33, arc chip elastic metallic muscle 34 and connecting rod 32,
arc chip elastic metallic muscle 34 one end are fixedly connected with end annulus seat 33, the other end intersects and be fixedly connected with end annulus seat 33, arc chip elastic metallic muscle 34 one-body molded making;
the lower end of described connecting rod 32 is fixedly connected with piston 2, the other end is fixedly connected with arc chip elastic metallic muscle intersection, and end annulus seat 33 is fixedly connected with support 7, and arc chip elastic metallic muscle intersection is positioned at the below of end annulus seat 33.
above-described is only preferential embodiment of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the principles of the present invention, can also make some improvement and modification, this is also considered as protection scope of the present invention.
Claims (14)
1. a bistable state safety device for pressure cooker, is characterized in that: it comprises cylinder barrel, piston and bistable state elastic device,
Described cylinder barrel wall has several relief holes, described piston and the hermetic seal of cylinder barrel liquid, and described bistable state elastic device is fixedly connected with cylinder barrel with piston; Under normal conditions, piston closes relief hole; While having pressure, piston moves up, and relief hole is connected with in pot; Described cylinder barrel has upper and lower opening or cylinder barrel has under shed, on its top cover, gas port is set; Or gas port is arranged on the wall on cylinder barrel top;
Or the inner wall of cylinder of the axial bottom of described cylinder barrel is provided with several relief holes, is axially provided with several axial air slots in the inner wall of cylinder on top, described cylinder barrel has upper and lower opening or cylinder barrel has under shed, on its top cover, gas port is set; The inwall liquid hermetic seal of described piston and the axial bottom of cylinder barrel, described bistable state elastic device is fixedly connected with cylinder barrel with piston; Under normal conditions, piston closes relief hole; While having pressure, piston moves up, and relief hole is connected with in pot;
Or being provided with several axial gas pressure relief slots in the axial first half inner wall of cylinder of described cylinder barrel, cylinder barrel has upper and lower opening, or cylinder barrel has under shed, on its top cover, gas port is set; Under normal conditions, the inner wall of cylinder liquid hermetic seal of described piston and the axial Lower Half of cylinder barrel, described bistable state elastic device is fixedly connected with cylinder barrel with piston; While having pressure, piston moves up, and the lower end of piston surmounts the intersection of the upper Lower Half of cylinder barrel, and gas pressure relief slot communicates with in pot;
Or described piston has the cavity of under shed, on cavity wall, there is relief hole; Described cylinder barrel has upper and lower opening, or has under shed, its top cover tool gas port; The diameter that has of the upper end of described cylinder barrel is greater than the pressure-releasing chamber of cylinder barrel diameter; Under normal conditions, described piston and the hermetic seal of inner wall of cylinder liquid, described bistable state elastic device is fixedly connected with cylinder barrel with piston; While having pressure, piston moves up, and the relief hole on piston surmounts the upper end of cylinder barrel and communicates with pressure-releasing chamber.
2. the bistable state safety device of a kind of pressure cooker according to claim 1, is characterized in that: described bistable state elastic device is arranged on the cylinder barrel of bottom of piston and is fixedly connected with the lower end of cylinder barrel.
3. the bistable state safety device of a kind of pressure cooker according to claim 2, is characterized in that: also comprise a compression spring, the lower end of described compression spring is fixedly connected with the top of piston, upper end is fixedly connected with top cover.
4. the bistable state safety device of a kind of pressure cooker according to claim 1, is characterized in that: described bistable state elastic device is arranged on the top of piston and is fixedly connected with the upper end of cylinder barrel.
5. according to the bistable state safety device of a kind of pressure cooker described in claim 2 or 3, it is characterized in that: bistable state elastic device comprises an arc elastic sheet metal and a connecting rod, the two ends of arc elastic sheet metal are fixedly connected with the lower end of cylinder barrel, and the lower end of described connecting rod is fixedly connected with the center of arc elastic sheet metal, upper end is fixedly connected with piston; Described arc elastic sheet metal is opening up;
Or described bistable state elastic device comprises two arc elastic sheet metals and a connecting rod, two arc elastic sheet metals are cross setting, and the arc elastic sheet metal intersection, lower end of described connecting rod is fixedly connected with, upper end is fixedly connected with piston; Described arc elastic sheet metal is opening up.
6. according to the bistable state safety device of a kind of pressure cooker described in claim 2 or 3, it is characterized in that: described bistable state elastic device comprises an end annulus seat, arc chip elastic metallic muscle and connecting rod,
Arc chip elastic metallic muscle one end is fixedly connected with end annulus seat, the other end intersects and be fixedly connected with end annulus seat, one-body molded the making of arc chip elastic metallic muscle;
The upper end of described connecting rod is fixedly connected with piston, lower end is fixedly connected with arc chip elastic metallic muscle intersection, and end annulus seat is fixedly connected with the lower end of cylinder barrel, and arc chip elastic metallic muscle intersection is positioned at the below of end annulus seat.
7. the bistable state safety device of a kind of pressure cooker according to claim 4, it is characterized in that: bistable state elastic device comprises an arc elastic sheet metal and a connecting rod, the two ends of arc elastic sheet metal are fixedly connected with the upper end of cylinder barrel, and the upper end of described connecting rod is fixedly connected with the center of arc elastic sheet metal, lower end is fixedly connected with piston; Described arc elastic sheet metal is opening up;
Or described bistable state elastic device comprises two arc elastic sheet metals and a connecting rod, two arc elastic sheet metals are cross setting, and described small end arc elastic sheet metal intersection is fixedly connected with, lower end is fixedly connected with piston; Described arc elastic sheet metal is opening up.
8. the bistable state safety device of a kind of pressure cooker according to claim 4, is characterized in that: described bistable state elastic device comprises an end annulus seat, arc chip elastic metallic muscle and connecting rod,
Arc chip elastic metallic muscle one end is fixedly connected with end annulus seat, the other end intersects and be fixedly connected with end annulus seat, one-body molded the making of arc chip elastic metallic muscle;
The lower end of described connecting rod is fixedly connected with piston, upper end is fixedly connected with arc chip elastic metallic muscle intersection, and end annulus seat is fixedly connected with the upper end of cylinder barrel, and arc chip elastic metallic muscle intersection is positioned at the below of end annulus seat.
9. the bistable state safety device of a kind of pressure cooker according to claim 7, it is characterized in that: also comprise a bistable state elastic device, described bistable state elastic device comprises an arc elastic sheet metal and a connecting rod, the two ends of arc elastic sheet metal are fixedly connected with the lower end of cylinder barrel, and the lower end of described connecting rod is fixedly connected with the center of arc elastic sheet metal, upper end is fixedly connected with piston; Described arc elastic sheet metal is opening up;
Or described bistable state elastic device comprises two arc elastic sheet metals and a connecting rod, two arc elastic sheet metals are cross setting, and arc elastic sheet metal intersection, described connecting rod one end is fixedly connected with, the other end is fixedly connected with piston; Described arc elastic sheet metal is opening down.
10. the bistable state safety device of a kind of pressure cooker according to claim 8, is characterized in that: also comprise a bistable state elastic device, described bistable state elastic device comprises an end annulus seat, arc chip elastic metallic muscle and connecting rod,
Arc chip elastic metallic muscle one end is fixedly connected with end annulus seat, the other end intersects and be fixedly connected with end annulus seat, one-body molded the making of arc chip elastic metallic muscle;
Described connecting rod one end is fixedly connected with piston, the other end is fixedly connected with arc chip elastic metallic muscle intersection, and end annulus seat is fixedly connected with the lower end of cylinder barrel, and arc chip elastic metallic muscle intersection is positioned at the below of end annulus seat.
The bistable state safety device of 11. 1 kinds of pressure cookers, is characterized in that: it comprises cylinder barrel, piston, elastic seal ring and bistable state elastic device,
Described piston has the cavity of a under shed, has radial guiding pore on cavity wall, and annular pressing plate is arranged at the top of piston; Described cylinder barrel has upper and lower opening;
Described elastic seal ring is fixed on the upper end of cylinder barrel or is fixed on pressing plate, piston and the hermetic seal of cylinder barrel liquid or matched in clearance; Bistable state elastic device is fixed on the lower end of cylinder barrel, and bistable state elastic device and piston are solidly connected; After bistable state elastic device action, and the pressure release relative with gap between pressing plate and elastic seal ring of radial guiding pore, or and the pressure release relative with gap between elastic seal ring and cylinder barrel upper end of radial guiding pore.
The bistable state safety device of 12. a kind of pressure cookers according to claim 11, is characterized in that: described bistable state elastic device, and described bistable state elastic device comprises an end annulus seat, arc chip elastic metallic muscle and connecting rod,
Arc chip elastic metallic muscle one end is fixedly connected with end annulus seat, the other end intersects and be fixedly connected with end annulus seat, one-body molded the making of arc chip elastic metallic muscle;
Described connecting rod one end is fixedly connected with piston, the other end is fixedly connected with arc chip elastic metallic muscle intersection, and end annulus seat is fixedly connected with the lower end of cylinder barrel, and arc chip elastic metallic muscle intersection is positioned at the below of end annulus seat.
The bistable state safety device of 13. 1 kinds of pressure cookers, is characterized in that: it comprises cylinder barrel, piston, elastic seal ring, support and bistable state elastic device,
Described piston has the cavity of a under shed, has radial guiding pore on cavity wall, and annular pressing plate is arranged at the top of piston; Described cylinder barrel has upper and lower opening;
Described elastic seal ring is fixed on the upper end of cylinder barrel or is fixed on pressing plate, piston and the hermetic seal of cylinder barrel liquid or matched in clearance; Bistable state elastic device is solidly connected with the support that is arranged on cylinder barrel top, and bistable state elastic device and piston are solidly connected; After bistable state elastic device action, and the pressure release relative with gap between pressing plate and elastic seal ring of radial guiding pore, or and the pressure release relative with gap between elastic seal ring and cylinder barrel upper end of radial guiding pore.
The bistable state safety device of 14. a kind of pressure cookers according to claim 13, is characterized in that: described bistable state elastic device, and described bistable state elastic device comprises an end annulus seat, arc chip elastic metallic muscle and connecting rod,
Arc chip elastic metallic muscle one end is fixedly connected with end annulus seat, the other end intersects and be fixedly connected with end annulus seat, one-body molded the making of arc chip elastic metallic muscle;
Described connecting rod one end is fixedly connected with piston, the other end is fixedly connected with arc chip elastic metallic muscle intersection, and end annulus seat is fixedly connected with support, and arc chip elastic metallic muscle intersection is positioned at the below of end annulus seat.
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| CN201310546251.5A CN103598810B (en) | 2013-10-29 | 2013-11-07 | A kind of bistable safety device of pressure cooker |
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| CN201310546251.5A CN103598810B (en) | 2013-10-29 | 2013-11-07 | A kind of bistable safety device of pressure cooker |
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| CN104172907A (en) * | 2014-09-09 | 2014-12-03 | 陆一铭 | Time-delay shutoff valve of electric pressure cooker |
| CN104830674A (en) * | 2015-05-27 | 2015-08-12 | 张伟伟 | Biogas collecting method of excessive gas collecting device |
| CN104830676A (en) * | 2015-05-27 | 2015-08-12 | 张伟伟 | Method for treating excess biogas by aid of energy-saving biogas fermentation system |
| CN107822497A (en) * | 2017-12-14 | 2018-03-23 | 安徽云媒信息科技有限公司 | A kind of pressure cooker pressure-detecting device |
| CN113273891A (en) * | 2021-04-25 | 2021-08-20 | 周华伟 | Pressure relief device of pressure cooker |
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| CN103598810B (en) | 2015-09-23 |
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