CN217696040U - Pressure cooking utensil - Google Patents

Abstract

The utility model discloses a pressure cooking utensil, including a kind of deep pot body, arrange a kind of deep pot internal inner bag, lid in and locate a kind of deep pot lid on the a kind of deep pot body, a kind of deep pot lid with the inner bag is formed with the culinary art chamber of placing edible material, a kind of deep pot is covered and is provided with discharge valve, discharge valve has the blast pipe, pressure cooking utensil still has anti-overflow device, anti-overflow device has the transition chamber, be equipped with the exhaust hole that feeds through culinary art chamber and transition chamber on the anti-overflow device, the exhaust hole with the blast pipe dislocation set, the aperture in exhaust hole is less than the internal diameter of blast pipe, discharge valve with the transition chamber intercommunication discharge valve is to external carminative state under, the pressure in the transition chamber is higher than external atmospheric pressure and is less than the pressure in the culinary art chamber, pressure difference between culinary art chamber and the transition chamber is greater than the pressure difference between transition chamber and the external atmospheric pressure. The utility model discloses can solve the problem that hot water juice spills over easily.

Description

Pressure cooking utensil

Technical Field

The utility model belongs to the domestic appliance field especially relates to a pressure cooking utensil.

Background

Pressure cooking appliances such as pressure cookers generate high pressure during cooking, and need to be opened after the pressure in the cooker is released. Pressure is generally released by opening the exhaust valve to exhaust in the prior art, if the pressure is directly exhausted after cooking is finished, a small amount of soup is easily carried by steam to overflow from the exhaust valve hole due to large pressure in the cooker, and the use experience of a user is influenced. Therefore, there is a need to improve the above-mentioned drawbacks.

SUMMERY OF THE UTILITY MODEL

The utility model provides a pressure cooking utensil to the problem that prior art exists to solve the problem that the hot water juice among the correlation technique spills over easily.

In order to achieve the above purpose, the specific technical solution of the present invention is as follows:

the utility model provides a pressure cooking utensil, includes a kind of deep pot body, arranges a kind of deep pot internal inner bag, lid in and locates a kind of deep pot lid on the a kind of deep pot body, a kind of deep pot lid with the inner bag is formed with the culinary art chamber of placing edible material, a kind of deep pot is covered and is provided with discharge valve, discharge valve has the blast pipe, wherein, pressure cooking utensil still has anti-overflow device, anti-overflow device has the transition chamber, be equipped with the exhaust hole that feeds through culinary art chamber and transition chamber on the anti-overflow device, the exhaust hole with the blast pipe dislocation set, the aperture in exhaust hole is less than the internal diameter of blast pipe, discharge valve with transition chamber intercommunication discharge valve is to external carminative state under, the pressure in the transition chamber is higher than external atmospheric pressure and is less than the pressure in the culinary art chamber, pressure difference between culinary art chamber and the transition chamber is greater than the pressure difference between transition chamber and the external atmospheric pressure.

In an embodiment of the present invention, the vent hole is a capillary hole.

In an embodiment of the present invention, the pore diameter of the capillary pore is R, and R is not less than 0.5mm and not more than 1.5mm.

In an embodiment of the present invention, the overflow preventing device is provided with a protruding portion extending into the transition cavity, and the exhaust hole is disposed on the protruding portion.

In an embodiment of the present invention, the pressure cooking appliance further comprises a control device, the control device has a first driving device for driving the exhaust valve to open and a second driving device for driving the exhaust valve to open, and the control device can control the first driving device and the second driving device to alternately act.

In an embodiment of the present invention, the first driving device is a solenoid valve, and the second driving device includes a blocking member disposed above the exhaust hole and a lifting device connected to the blocking member for controlling the lifting of the blocking member.

In an embodiment of the present invention, the anti-overflow device further comprises a backflow structure, the backflow structure has a backflow hole and a check valve for opening and closing the backflow hole.

In an embodiment of the present invention, the overflow-preventing device is an overflow-preventing box disposed on the cover, and the overflow-preventing box cover is disposed at the bottom of the exhaust valve.

In one embodiment of the present invention, one of the spill-proof box and the cover is provided with a fixing hole, and the other of the spill-proof box and the cover is provided with a fixing post, wherein the fixing hole and the fixing post cooperate with each other to fix the spill-proof box on the cover.

In an embodiment of the present invention, the overflow preventing device is a second inner container accommodated in the inner container, and the second inner container is connected to the upper portion of the inner container.

After the technology is adopted, the utility model has the advantages that:

the utility model discloses a setting has the anti-overflow device of transition chamber, and set up the exhaust hole that communicates culinary art chamber and transition chamber on the anti-overflow device, make the steam in the culinary art intracavity enter into the transition chamber through the exhaust hole earlier, discharge external space in the discharge valve with the transition chamber intercommunication again, because the pressure in the transition chamber is higher than external atmospheric pressure, be less than the pressure in the culinary art intracavity, and the pressure differential between culinary art chamber and the transition chamber is greater than the pressure differential between transition chamber and the external atmospheric pressure, after steam enters into the transition chamber by the culinary art chamber, steam gets the release, steam pressure can reduce rapidly, and become low-pressure steam, and the relatively less pressure differential between transition chamber and the external atmospheric pressure is not enough to drive low-pressure steam again and takes out the hot water, finally make the hot water taken out from the culinary art chamber collect by the transition chamber, avoid the hot water to spill over from the exhaust valve hole; meanwhile, compared with a mode of lowering the pressure of the cooking utensil through natural cooling after cooking, the anti-overflow device with the transition cavity can enable a user to directly exhaust and open the cover after cooking or after short-time cooling, so that waiting time of the user is reduced, and use experience of the user is improved; in addition, the aperture in exhaust hole is less than the internal diameter of blast pipe, can make the faster discharge of steam in the transition chamber, avoids steam to gather too much at the transition chamber and causes the pressure in the transition chamber to rise, and exhaust hole and blast pipe dislocation set can make and discharge from discharge valve again after the steam that gets into from the culinary art chamber drops pressure through the transition chamber, avoids steam directly to rush into in the exhaust valve hole to further improve the effect of anti-overflow.

These features and advantages of the present invention will be disclosed in more detail in the following detailed description and the accompanying drawings.

Drawings

Fig. 1 is a schematic structural view of the pressure cooking appliance according to an embodiment of the present invention;

fig. 2 is a schematic structural view of the pot cover and the overflow preventing device according to an embodiment of the present invention;

fig. 3 is a schematic view of an explosive structure of the pot cover and the overflow preventing device according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of the pressure cooking appliance according to an embodiment of the present invention;

fig. 5 is a schematic structural view of the exhaust hole according to an embodiment of the present invention when the exhaust hole is opened;

fig. 6 is a schematic structural view of the exhaust valve according to an embodiment of the present invention when opened;

fig. 7 is a schematic structural view of the pressure cooking appliance according to an embodiment of the present invention;

reference numerals are as follows: a pot body 100; a pot cover 200; an exhaust valve 210; weight 211; an exhaust pipe 212; a fixing column 220; an inner container 300; a cooking chamber 310; an overflow prevention device 400; a transition chamber 410; an exhaust hole 420; a boss 430; a return hole 441; a check valve 442; a fixing hole 450; a first driving device 510; a second driving device 520; a closure 521; a lifting device 522; the device 600 is heated.

Detailed Description

For better understanding of the objects, structure and functions of the present invention, the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.

Referring to fig. 1 to 7, the pressure cooking utensil that this embodiment provided includes a kind of deep pot body 100, arranges the inner bag 300 in the kind of deep pot body 100 in, the lid locates a kind of deep pot lid 200 on the kind of deep pot body 100, the pot lid 200 with the inner bag 300 is formed with the cooking chamber 310 of placing the food material, be provided with exhaust valve 210 on the kind of deep pot lid 200, exhaust valve 210 has exhaust pipe 212, pressure cooking utensil still has anti-overflow device 400, anti-overflow device 400 has transition chamber 410, be equipped with the exhaust hole 420 that communicates cooking chamber 310 and transition chamber 410 on the anti-overflow device 400, exhaust hole 420 with exhaust pipe 212 dislocation set, the aperture of exhaust hole 420 is less than the internal diameter of exhaust pipe 212, wherein, exhaust valve 210 with transition chamber 410 communicates under the carminative state of outside world of transition chamber 210, the pressure in the transition chamber 410 is higher than outside atmospheric pressure and is less than the pressure in the cooking chamber 310, the pressure difference between cooking chamber 310 and the transition chamber 420 is greater than the pressure difference between transition chamber 410 and the outside atmospheric pressure.

Specifically, the cooker body 100 and the cooker cover 200 may be separately arranged or hinged, a sealing ring is arranged on the cooker cover 200, the cooker body 100 has an inner container 300, when the cooker cover 200 is covered on the cooker body 100, the sealing ring is in sealing contact with the cooker body 100, and a cooking cavity 310 is formed between the cooker cover 200 and the inner container 300 for containing food materials to be cooked, such as rice and the like. A heating device 600 is disposed below the inner container 300 to heat the food in the cooking chamber 310 and gradually increase the pressure in the cooking chamber 310 during the heating process. The exhaust valve 210 has an exhaust pipe 212 communicating the outside and the transition chamber, and a weight 211 fastened to the exhaust pipe 212, and the exhaust pipe 212 can be opened and closed by controlling the weight 211.

The present invention is not limited to the specific form of the overflow preventing device 400. For example, in one embodiment, the overfill prevention device 400 is a bowl-like structure that is positioned to cover the underside of the vent valve 210; in another embodiment, the overflow prevention device 400 is a separate lower cover that can be mounted to the pot cover 200 and covers the entire lower surface of the pot cover, forming a transition cavity 410 therebetween.

In the prior art, when the cooking utensil exhausts air and releases pressure after cooking is finished, the problem of soup overflow can be caused, and if the pot is naturally cooled and then exhausts air and opens the cover, although the soup cannot overflow, the natural cooling pressure release generally needs 30-40min, the waiting time is long, and the cooking efficiency is low. In the embodiment, the anti-overflow device 400 with the transition cavity 410 is arranged, and the vent holes 420 communicating the cooking cavity 310 and the transition cavity 410 are arranged on the anti-overflow device 400, so that steam in the cooking cavity firstly enters the transition cavity 410 through the vent holes 420 and then is exhausted to the external space from the vent valve 210 communicated with the transition cavity, because the pressure in the transition cavity 410 is higher than the external atmospheric pressure and lower than the pressure in the cooking cavity 310, and the pressure difference between the cooking cavity 310 and the transition cavity 410 is larger than the pressure difference between the transition cavity 410 and the external atmospheric pressure, after the steam enters the transition cavity 410 from the cooking cavity 310, the steam is released, the steam pressure is rapidly reduced and changed into low-pressure steam, and the relatively smaller pressure difference between the transition cavity 410 and the external atmospheric pressure is not enough to drive the low-pressure steam to carry soup out, and finally the soup carried out from the cooking cavity 310 is collected by the transition cavity, so that the soup is prevented from overflowing from the vent holes; simultaneously, compare in the mode that makes cooking utensil step-down of rethread natural cooling after the culinary art is accomplished, set up anti-overflow device 400 that has transition chamber 410 and can make the user directly exhaust after the culinary art is accomplished or through short cooling back and uncap, be favorable to reducing user's latency, improve user's use and experience. In addition, the aperture of exhaust hole 420 is less than the internal diameter of blast pipe 212, can make the faster discharge of steam in transition chamber 410, avoids steam to gather at transition chamber 410 too much and causes the pressure rise in the transition chamber, and exhaust hole 420 and blast pipe 212 dislocation set can make the steam that gets into from culinary art chamber 310 discharge from discharge valve 210 again after transition chamber 410 step-down, avoids steam directly to rush into in the exhaust valve hole, further improves the effect of anti-overflow.

In some embodiments of the present invention, referring to fig. 1, 2 and 3, the vent 420 is a capillary hole. The capillary hole is a hole which forms a capillary structure with a hole wall, and the inner diameter of the exhaust pipe 212 is larger than the hole diameter of the capillary hole. Optionally, the vent hole 420 is opened in the bottom of the overflow prevention device 400. Of course, the capillary openings may be provided in the side wall of the overflow prevention device and away from the bottom wall of the overflow prevention device to prevent the capillary openings from being clogged by the broth entering the transition chamber 410.

In the present embodiment, the way of releasing pressure and exhausting air by the exhaust valve is not particularly limited. In one embodiment, the control element of the weight is an electromagnetic valve, and when the pressure relief and the exhaust are needed, the cooking appliance automatically controls the electromagnetic valve to push the weight 211 so that the exhaust pipe 212 is communicated with the outside; in another embodiment, the control element of the weight is a push rod disposed under the weight, and when pressure relief and exhaust are required, the user manually presses an exhaust button to drive the push rod to tilt up the weight 211 and open the exhaust pipe 212.

Since cooking chamber 310 and transition chamber 410 are in communication through vent 420, cooking chamber 310 and transition chamber 410 are at equal pressure after cooking is complete. When a user exhausts air by using the exhaust valve 210, air in the transition cavity 410 is exhausted firstly, because soup does not exist in the transition cavity 410 at this time, the exhausted steam does not cause the problem of overflowing of the soup, and because the inner diameter of the exhaust pipe 212 is larger than the aperture of the capillary hole, the steam quantity entering the transition cavity 410 from the cooking cavity 310 is smaller than the steam quantity exhausted from the transition cavity 410, so that a low pressure difference state can be formed between the transition cavity 410 and the external atmospheric pressure, and because the diameter of the capillary hole is smaller and the steam flow resistance is larger, high-pressure steam in the cooking cavity 310 can be released into the transition cavity 410 in a small flow manner, the steam pressure is released instantly and changed into low-pressure steam, and the relatively smaller pressure difference between the transition cavity 410 and the external atmospheric pressure causes the steam energy and the flow rate when the transition cavity exhausts air, the steam is difficult to take out the soup from the transition cavity 410, and finally the soup taken out from the cooking cavity 310 is collected by the transition cavity 410, so that the soup is prevented from overflowing from the exhaust valve hole. Meanwhile, when the steam pressure is released in the transition cavity 410, most of water in the steam can be condensed in the transition cavity, so that the amount of the steam discharged from the exhaust valve hole can be reduced, and the possibility that the steam scalds a user is reduced.

In a specific embodiment, the pore diameter of the capillary pore is R, and R is more than or equal to 0.5mm and less than or equal to 1.5mm. So can make the aperture R of capillary hole be in a reasonable scope, balanced anti-overflow effect and exhaust time: if the aperture R of the capillary hole is smaller than 0.5mm, although a suitable pressure difference can be formed between the cooking cavity 310, the transition cavity 410 and the external atmosphere, so as to obtain a better anti-overflow effect, if the aperture R is too small, the vent hole 420 is not easy to process and manufacture, and meanwhile, the pressure relief time is too long, so that the waiting time of a user is increased; if the aperture R of the capillary hole is greater than 1.5mm, although the pressure relief time can be reduced, the amount of steam entering the transition cavity 410 from the cooking cavity 310 is too large, so that the pressure difference between the transition cavity 410 and the external atmospheric pressure is increased, and a better anti-overflow effect cannot be achieved.

In a specific embodiment, the bottom of the spill prevention device is provided with a boss 430 extending into the transition chamber 410, and the vent hole 420 is provided on the boss 430. The arrangement can prevent the soup brought into the transition cavity 410 by the steam from blocking the exhaust hole 420, and ensure the smooth pressure relief and exhaust.

More specifically, referring to fig. 2, the protrusion 430 is a boss provided on the bottom wall of the overflow preventing device, and the vent hole 420 penetrates through the boss and the bottom wall of the overflow preventing device to communicate the transition chamber 410 and the cooking chamber 310.

In some embodiments of the present invention, the pressure cooking appliance further comprises a control device, the control device has a first driving device 510 for driving the exhaust valve 210 to open and a second driving device 520 for driving the exhaust hole 420 to open, and the control device can control the first driving device 510 and the second driving device 520 to alternately act.

It should be noted that, in this embodiment, the state of the exhaust hole 420 in the cooking process is not specifically limited, and the second driving device 520 may control the exhaust hole 420 to be in a normally closed state in the cooking process, and may also control the exhaust hole 420 to be in a normally open state. The following description will be made by taking the case where the exhaust hole 420 is normally closed during cooking as an example: referring to fig. 5 and 6, after cooking is completed, the control unit controls the second driving unit 520 to open the vent hole 420, and after releasing a portion of the pressure steam into the transition chamber 410, closes the vent hole 420, so that a relatively low pressure state is formed in the transition chamber 410 and the cooking liquor is retained in the transition chamber 410; then, the first driving device 510 is controlled to open the exhaust valve 210, steam is exhausted, the pressure in the transition cavity 410 is released, the exhaust valve 210 is closed after the exhaust of the transition cavity 410 is finished, in the process, the relatively small pressure difference between the transition cavity 410 and the external atmospheric pressure enables the steam energy and the flow rate during the exhaust of the transition cavity to be low, the steam is difficult to carry soup out, and finally the soup brought out from the cooking cavity 310 is collected by the transition cavity 410; thus, the second driving means 520 alternately opens the exhaust hole 420 for a plurality of times and for a short time to gradually release the steam in the cooking cavity 310 into the transition cavity 410, gradually releasing the pressure in the cooking cavity 310, and preventing the soup from overflowing through the exhaust hole. Meanwhile, pressure relief and exhaust are performed in a gradient pressure difference mode, energy generated during exhaust in each stage is reduced, and safety performance of the pressure cooking appliance during exhaust is improved.

In a specific embodiment, referring to fig. 4, 5 and 6, the first driving device 510 is a solenoid valve, and the second driving device 520 includes a blocking member 521 disposed above the exhaust hole 420 and a lifting device 522 connected to the blocking member 521 and controlling the lifting of the blocking member 521.

More specifically, the lifting device 522 is a solenoid valve, a valve rod of the solenoid valve is connected with the blocking piece 521, the blocking piece 521 passes through the pot cover, and the lower end of the blocking piece can abut against the exhaust hole 420. Further, an elastic sealing silica gel is arranged at the position where the plugging piece 521 penetrates through the cooker cover, one end of the sealing silica gel is fixed on the cooker cover, the other end of the sealing silica gel completely wraps the plugging piece 521, and the plugging piece 521 contacts the exhaust hole 420 through the sealing silica gel to form a seal. When pressure relief and air exhaust are needed, the electromagnetic valve drives the control plugging piece 521 to move upwards through the valve rod, and steam can enter the transition cavity 410 from the position of the air exhaust hole.

In some embodiments of the present invention, the overflow preventing device is further provided with a backflow structure, the backflow structure has a backflow hole 441 and a check valve 442 for opening and closing the backflow hole 441.

Specifically, the check valve 442 has a fixing column and an elastic sealing sheet connected to the fixing column, the fixing column is embedded in the bottom wall of the anti-overflow device 400 from outside to inside, and the elastic sealing sheet is located below the backflow hole 441.

In the cooking process and the pressure relief and exhaust process, the pressure in the cooking cavity 310 is greater than the pressure in the transition cavity 410, the pressure applied to the elastic sealing sheet is greater than the gravity of the elastic sealing sheet, and the pressure in the cooking cavity pushes the elastic sealing sheet to generate elastic deformation and attach to the bottom wall of the anti-overflow device 400 so as to block the backflow hole 441 and prevent steam from entering the transition cavity 410 from the backflow hole 441; after the pressure relief and the exhaust are completed, the elastic sealing sheet falls down, the soup falls back into the cooking cavity 310 through the backflow hole 441, and the waste of the soup is avoided.

In some embodiments of the present invention, referring to fig. 1, fig. 2 and fig. 3, the overflow preventing device is an overflow preventing box disposed on the cooker cover, and the overflow preventing box cover is disposed at the bottom of the exhaust valve 210.

Specifically, referring to fig. 2, the whole anti-overflow box is a cylindrical tray-shaped structure, and includes a bottom wall and an annular side wall extending upwards from the bottom wall, a larger cavity is formed between the bottom wall and the annular side wall, so that the steam pressure can be released more fully, and meanwhile, the soup brought into the transition cavity by the steam can be collected better. The exhaust hole and the backflow structure are arranged on the bottom wall of the anti-overflow box, a circle of silica gel sealing ring is arranged at the top end of the side wall of the anti-overflow box, and the sealing ring is clamped between the anti-overflow box and the cooker cover so as to form a relatively sealed transition cavity.

In some preferred embodiments, referring to fig. 2 and 3, one of the spill-proof box and the cooker cover is provided with a fixing hole 450, and the other of the spill-proof box and the cooker cover is provided with a fixing post 220, and the fixing hole 450 and the fixing post 220 cooperate with each other to fix the spill-proof box on the cooker cover 200.

In a specific embodiment, the fixing post 220 is fixed on the pot cover 200, the bottom wall of the anti-overflow box is provided with a fixing hole 450, the lower end of the fixing post 220 is provided with a threaded section which penetrates through the fixing hole 450 and protrudes out of the bottom wall of the anti-overflow box, and the anti-overflow box is fixed on the pot cover 200 by screwing with a nut arranged below the anti-overflow box. Furthermore, an O-shaped sealing ring is arranged in the fixing hole 450, and the gap between the joint of the fixing column 220 and the fixing hole 450 is sealed through the deformation of the O-shaped sealing ring, so that steam is prevented from entering the transition cavity from the joint.

Of course, in other embodiments, the spill-proof box may be fixed by arranging a clamp or the like on the pot cover 200, which is not limited herein.

In some embodiments of the present invention, referring to fig. 7, the anti-overflow device is a second inner container accommodated in the inner container 300, and the second inner container is connected to the upper portion of the inner container 300. The arrangement can make the transition cavity 410 have a larger space, so that the steam pressure is more fully released, and the anti-overflow effect is improved.

Specifically, the mouth edge of the inner container 300 is provided with a pot tooth, the second inner container is provided with a buckle, and the second inner container is fixed by clamping the buckle and the pot tooth. Of course, in other embodiments, the inner wall of the inner container 300 and the outer wall of the second inner container may be respectively provided with threads, and the second inner container and the inner container are screwed and fixed, which is not limited herein.

It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes or equivalents may be substituted for elements thereof by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are intended to be covered by the present invention.

Claims (10)

1. The utility model provides a pressure cooking utensil, includes a kind of deep pot body, arranges a kind of deep pot internal inner bag, lid in and locates a kind of deep pot lid on the a kind of deep pot body, a kind of deep pot lid with the inner bag is formed with the culinary art chamber of placing edible material, a kind of deep pot is covered and is provided with discharge valve, discharge valve has the blast pipe, a serial communication port, pressure cooking utensil still has anti-overflow device, anti-overflow device has the transition chamber, be equipped with the exhaust hole that feeds through culinary art chamber and transition chamber on the anti-overflow device, the exhaust hole with the blast pipe dislocation set, the aperture in exhaust hole is less than the internal diameter of blast pipe, wherein, discharge valve with the transition chamber intercommunication discharge valve is to external carminative state under, the pressure in the transition chamber is higher than external atmospheric pressure and is less than the pressure in the culinary art chamber, the pressure differential between culinary art chamber and the transition chamber is greater than the pressure differential between transition chamber and the external atmospheric pressure.

2. A pressure cooking appliance as claimed in claim 1, wherein the vent is a capillary.

3. The pressure cooking appliance of claim 2, wherein the capillary pores have a pore size R, R being 0.5mm ≦ R ≦ 1.5mm.

4. Pressure cooking appliance according to claim 2, wherein the overflow prevention device bottom is provided with a protrusion extending into the transition chamber, the vent hole being provided on the protrusion.

5. Pressure cooking appliance according to claim 1, characterized in that it further comprises control means having first drive means for driving the opening of the degassing orifice and second drive means for driving the opening of the degassing orifice, said control means being able to control the first drive means and the second drive means to act alternately.

6. The pressure cooking appliance of claim 5, wherein the first driving device is a solenoid valve and the second driving device comprises a blocking member disposed above the vent hole and a lifting device connected to the blocking member for controlling the lifting of the blocking member.

7. The pressure cooking appliance of claim 1, wherein said overflow prevention device is further provided with a backflow structure having a backflow hole and a one-way valve opening and closing said backflow hole.

8. A pressure cooking appliance as claimed in any one of claims 1 to 7, wherein the spill prevention means is a spill prevention box provided on the pot cover, the spill prevention box cover being provided at the bottom of the air release valve.

9. The pressure cooking appliance of claim 8, wherein one of said spill-resistant box and said lid is provided with a securing hole and the other of said spill-resistant box and said lid is provided with a securing post, said securing hole and said securing post cooperating to secure said spill-resistant box to said lid.

10. Pressure cooking appliance according to any of the claims 1-7, characterised in that the overflow preventing means is a second inner container accommodated in the inner container, which second inner container is snapped on the upper part of the inner container.

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