CN218128072U - Pressure cooking appliance safe to use - Google Patents

Abstract

The utility model discloses a pressure cooking utensil safe in utilization, including utensil body and lid, the lid lock is in form pressure cooking chamber on the utensil body, the lid disposes the open-ended pole of float and activity, the float follows pressure cooking intracavity pressure variation and fluctuation, open-ended pole receives the float come-up and restriction action, the float is equipped with the relief valve of exhaust passage and control exhaust passage break-make, when the float is limited the come-up by open-ended pole, exhaust passage with pressure cooking chamber communicates with each other, the relief valve is constructed and is opened when exhaust passage internal gas pressure is greater than the default. The problem of at present to the gas discharge channel precision requirement on the float high is solved. The utility model has the advantages that: the pressure relief pressure can be accurately controlled only through the safety valve, the requirement on the size precision of the exhaust channel is reduced, the processing difficulty is favorably reduced, and the production cost is reduced.

Description

Pressure cooking appliance safe to use

Technical Field

The utility model relates to a kitchen appliances field, concretely relates to safe in utilization's pressure cooking utensil.

Background

The pressure cooking appliance is a common article in daily cooking of people, such as an electric pressure cooker and the like, a floater and an anti-opening rod are arranged on a cooker cover, if the cooker cover and a cooker body are screwed in place, the anti-opening rod can leave enough positions for the floater after sliding, the floater floats upwards after the temperature and the pressure in the cooker body are raised and pressurized, the floater props against the anti-opening rod, the danger to a user caused by opening the cover under the condition of pressure in the cooker is prevented, and the floater can descend only after the pressure in the cooker is reduced to a safe value and then the cover is opened safely.

However, the cooker cover and the cooker body are not completely screwed in place, namely, the cooker cover and the cooker body are in a half-locking state, the anti-opening rod can prevent the floater from floating upwards in the state, the floater is provided with the exhaust channel, although the cooker cover and the cooker body are not screwed in place, heating and boosting can be carried out at all, the pressure can be relieved through the exhaust channel, if the pipe diameter of the exhaust channel is too large, normal pressure rise can be influenced, if the pipe diameter of the exhaust channel is too small, the pressure in the cooker in the half-locking state can exceed a standard value, safety risks exist, and therefore the requirement on the precision of the size of the exhaust channel is higher.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a pressure cooking utensil safe in utilization can effectively solve current pressure cooking utensil and to the high problem of exhaust passage required precision on the float.

In order to solve the technical problem, the utility model discloses a realize through following technical scheme: the pressure cooking appliance comprises an appliance body and a cover body, wherein the cover body is buckled on the appliance body to form a pressure cooking cavity, the cover body is provided with a floater and a movable opening stopping rod, the floater floats up and down along with the pressure change in the pressure cooking cavity, the opening stopping rod is limited by the floating of the floater to move upwards, the floater is provided with an exhaust channel and a safety valve for controlling the on-off of the exhaust channel, when the floater floats upwards under the limitation of the opening stopping rod, the exhaust channel is communicated with the pressure cooking cavity, and the safety valve is opened when the pressure in the exhaust channel is greater than a preset value.

In the pressure cooking appliance safe in use, the safety valve comprises a safety cap and a valve core, the safety cap is fixed on the cover body, a containing cavity is arranged in the safety cap, the valve core is located in the containing cavity, the top end of the floater is provided with an air outlet of the exhaust channel, and the valve core controls the on-off of the air outlet.

In the above pressure cooking appliance safe in use, the valve core is a gravity ball, the gravity ball is in the accommodating cavity moving in the vertical direction, and the gravity ball abuts against the air outlet.

In the above pressure cooking appliance safe in use, the top end of the float is provided with a concave surface adapted to the gravity ball, and the air outlet is located at the bottom end of the concave surface.

In the above pressure cooking appliance safe in use, the valve core is a diaphragm, the diaphragm is connected to the top end of the float in a sealing manner, and a pressure relief seam corresponding to the position of the air outlet is formed in the diaphragm.

In the pressure cooking appliance safe in use, the safety cap is provided with an air leakage port; or an air leakage opening is formed between the safety cap and the surface cover.

In the pressure cooking appliance safe in use, the cover body is further fixed with an installation platform, a sliding hole matched with the floater is formed in the installation platform, and a limiting boss for limiting the downward movement distance of the floater is arranged at the bottom of the sliding hole.

In the above-mentioned pressure cooking appliance safe in use, the float includes the body of rod and sets up and be equipped with the slider in body of rod middle part, the body of rod passes the slide opening, slider and slide opening sliding fit.

In the pressure cooking appliance safe in use, the opening stop rod is provided with a lock hole matched with the slide block.

In the pressure cooking utensil safe in use, the cover body is provided with the mounting hole, the mounting table is in threaded connection with the mounting hole, and the sealing ring is further arranged between the mounting table and the cover body.

Compared with the prior art, the utility model has the advantages that:

the pressure cooking appliance comprises an appliance body and a cover body, wherein the cover body is buckled on the appliance body to form a pressure cooking cavity, the cover body is provided with a floater and a movable opening stopping rod, the floater floats up and down along with the pressure change in the pressure cooking cavity, the opening stopping rod is limited by the floating of the floater to move upwards, the floater is provided with an exhaust channel and a safety valve for controlling the on-off of the exhaust channel, when the floater floats upwards under the limitation of the opening stopping rod, the exhaust channel is communicated with the pressure cooking cavity, and the safety valve is opened when the pressure in the exhaust channel is greater than a preset value. The safety valve is arranged to control the on-off of the exhaust channel, so that the problem that the precision requirement on the exhaust channel on the floater is high at present is solved. The float can come-up when receiving pressure cooking intracavity pressure effect, if lid and utensil body do not have complete lock, stop to open the pole and will prevent the float come-up, that is under the semi-lock state, the float does not have the way come-up yet, the exhaust passage who offers on the float communicates with each other with pressure cooking chamber this moment, exhaust passage's break-make is controlled by the relief valve, only when the pressure of pressure cooking intracavity is greater than certain numerical value, the relief valve just can open and make pressure cooking chamber and external world communicate with each other, carry out the pressure release, so as just can accurately control pressure release pressure through the relief valve, the requirement to exhaust passage size precision has been reduced, be favorable to reducing the processing degree of difficulty, and the production cost is reduced.

In a further scheme, the safety valve comprises a safety cap and a valve core, the safety cap is fixed on the cover body, an accommodating cavity is formed in the safety cap, the valve core is located in the accommodating cavity, the top end of the floater is provided with an air outlet of an exhaust channel, and the valve core controls the on-off of the air outlet. The safety cover fixed on the cover body protects the valve core arranged in the containing cavity, so that the valve core is prevented from being lost during transportation or use, the valve core can be prevented from being damaged accidentally, and the valve core is arranged on the air outlet at the top end of the floater, so that the installation and the arrangement are relatively simple.

In a further scheme, the valve core is a gravity ball, the gravity ball is in an accommodating cavity moving along the vertical direction, and the gravity ball abuts against the air outlet. The gravity ball controls the pressure in the pressure cooking cavity by means of weight, the implementation mode is simple and reliable, the gravity ball can be jacked up only when the pressure in the pressure cooking cavity reaches a certain value, the pressure relief can be realized, enough pressure can be accumulated in the pressure cooking cavity during cooking, and the danger caused by overlarge pressure can be avoided.

In a further scheme, a concave surface matched with the gravity ball is arranged at the top end of the floater, and the air outlet is located at the bottom end of the concave surface. The concave surface arranged at the top end of the floater can be better matched with the gravity ball, so that the top end of the floater and the gravity ball form a sealing surface, and the pressure cooking cavity is ensured to be airtight in the pressurizing process.

In a further scheme, the valve core is a membrane, the membrane is connected to the top end of the floater in a sealing mode, and a pressure relief seam corresponding to the position of the air outlet is formed in the membrane. In another valve core form, pressure control is performed by using a pressure relief seam on the diaphragm, the pressure relief seam is jacked open to relieve pressure when the pressure is overlarge, and the safety pressure in the cooking cavity can be accurately controlled by controlling the thickness of the diaphragm at the position of the pressure relief seam, the material of the diaphragm and other parameters.

In a further scheme, an air leakage port is formed in the safety cap; or an air leakage opening is formed between the safety cap and the surface cover. An air leakage opening is formed in the safety cap or between the safety cap and the face cover, so that air leaked from the air outlet can be discharged outwards.

In a further scheme, an installation platform is further fixed on the cover body, a sliding hole matched with the floater is formed in the installation platform, and a limiting boss for limiting the downward movement distance of the floater is arranged at the bottom of the sliding hole. Through setting up the mount table, prescribe a limit to the orbit when the float floats, ensure that the float can smooth and easy come-up and descend, set up spacing boss in the bottom of slide opening moreover, do not lift the float when the pressure cooks the intracavity still and do not rise the pressure, prevent that the float from falling into the pressure cooks the intracavity.

In a further scheme, the floater comprises a rod body and a sliding block arranged in the middle of the rod body, the rod body penetrates through the sliding hole, and the sliding block is in sliding fit with the sliding hole. Through slider and slide opening cooperation, reduce the frictional force between float and the mount table, only need ensure the external surface machining precision of slider moreover, reduce the machining precision requirement to the float.

In a further scheme, a lock hole matched with the slide block is formed in the opening stop rod. Whether the floater can float up is controlled through the lock hole, and only when the cover body is completely buckled with the appliance body, the sliding block can pass through the lock hole to enable the floater to float up.

In a further scheme, a mounting hole is formed in the cover body, the mounting table is in threaded connection with the mounting hole, and a sealing ring is further arranged between the mounting table and the cover body. Through threaded connection make things convenient for mount table and lid assembly to be provided with the sealing washer and improve sealed precision, prevent pressure cooking intracavity pressure release.

Drawings

FIG. 1 is a schematic structural view of a pressure cooking device of the present invention;

FIG. 2 is a schematic view showing a state of a float when no pressure is applied in a first embodiment of the pressure cooking appliance according to the present invention;

FIG. 3 is a cross-sectional view of a float in an embodiment of the pressure cooking appliance of the present invention that is safe in use;

FIG. 4 is a schematic view showing a state of a float at the time of pressure rise in the first embodiment of the pressure cooking appliance of the present invention which is safe in use;

FIG. 5 is a schematic view showing a state of a float when no pressure is applied in a second embodiment of the pressure cooking appliance according to the present invention;

FIG. 6 is a sectional view of a float of a second embodiment of the safety pressure cooker of the present invention;

FIG. 7 is a sectional view of a float in a third embodiment of the safety pressure cooker of the present invention;

fig. 8 is an enlarged view of a portion a of fig. 7.

The reference signs are:

the structure comprises a cover body 100, a floater 110, an exhaust channel 111, an air inlet 1111, a safety valve 112, a safety cap 1121, a valve core 1122, an accommodating cavity 1123, a fixing part 1124, a sealing part 1125, an air leakage opening 1126, a pressure leakage seam 1127, a concave surface 113, a rod body 114, a sliding block 115, an opening stop rod 120, a lock hole 121, an installation table 130, a sliding hole 131, a limiting boss 132 and a sealing ring 133;

an appliance body 200, a pressure cooking chamber 210.

Detailed Description

The cover body is buckled on the appliance body to form a pressure cooking cavity, the cover body is provided with a floater and a movable opening stopping rod, the floater floats up and down along with the pressure change in the pressure cooking cavity, the opening stopping rod is limited by the floating of the floater to move, the floater is provided with an exhaust channel and a safety valve for controlling the on-off of the exhaust channel, when the floater floats upwards under the limitation of the opening stopping rod, the exhaust channel is communicated with the pressure cooking cavity, and the safety valve is constructed to be opened when the pressure in the exhaust channel is greater than a preset value. The safety valve is arranged to control the on-off of the exhaust channel, so that the problem that the precision requirement on the exhaust channel on the floater is high at present is solved. The float can come up when receiving pressure cooking intracavity pressure effect, if lid and utensil body do not have complete lock, the end-to-open pole will prevent the float come-up, namely under the semi-lock state, the float also has no way come-up, the exhaust passage who offers on the float communicates with each other with pressure cooking chamber this moment, exhaust passage's break-make is controlled by the relief valve, only when pressure cooking intracavity pressure is greater than certain numerical value, the relief valve just can open and make pressure cooking chamber and external world communicate with each other, carry out the pressure release, so as just can accurately control pressure release pressure through the relief valve, the requirement to exhaust passage size precision has been reduced, be favorable to reducing the processing degree of difficulty, and the production cost is reduced.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The first embodiment is as follows:

referring to fig. 1 and 2, in a first embodiment of the pressure cooking appliance of the present invention, the pressure cooking appliance includes an appliance body 200 and a cover 100, a heating device and an inner container are disposed in the appliance body 200, the cover 100 is fastened to the appliance body 200, and the cover 100 and the inner container form a sealed pressure cooking cavity 210, the cover 100 and the appliance body 200 are connected by a screwing manner, a float 110 and a movable opening-stopping rod 120 are disposed in the cover 100, only when the cover 100 and the appliance body 200 are completely screwed, the opening-stopping rod 120 is switched to an open state, the float 110 is not blocked by the opening-stopping rod 120, and can freely float up and down, if the cover 100 and the appliance body 200 are not completely screwed, the opening-stopping rod 120 limits the float 110 to float up, the pressure cooking appliance is in a half-lock state, and the pressure cooking cavity 210 can be heated at any time.

As shown in fig. 2 and 3, an exhaust passage 111 is provided in the float 110 along the vertical axis direction, the exhaust passage 111 includes an air inlet 1111 and an air outlet, the air inlet 1111 is located on the side wall of the lower portion of the float 110, and the air outlet is located at the top end of the float 110, the air inlet 1111 is provided on the side wall of the lower portion of the float 110 because if the float 110 floats upwards without being blocked by the opening-stopping rod 120, the air inlet 1111 is closed by the lid body 100, the exhaust passage 111 of the float 110 is closed, the pressure in the pressure cooking chamber 210 is controlled by the pressure valve on the lid body 100, the air inlet 1111 is communicated with the pressure cooking chamber 210 only when the opening-stopping rod 120 restricts the float 110, and the safety valve 112 is provided on the air outlet, and the safety valve 112 opens the air outlet only when the pressure in the pressure cooking chamber 210 is greater than the set value of the safety valve 112, so as to release the pressure, thereby ensuring safe use when the lid body 100 and the appliance body 200 are not completely screwed.

The safety valve 112 includes a safety cap 1121 and a valve core 1122, the safety cap 1121 is fixed on the cover body 100, and specifically, the safety cap 1121 may be connected to the cover body 100 through interference fit or adhesion, an accommodating cavity 1123 is provided in the safety cap 1121, the valve core 1122 is located in the accommodating cavity 1123, the top of the float 110 may extend into the accommodating cavity 1123, and the safety cap 1121 may be made of a transparent material, so that a user may visually check a state of the valve core 1122. In this embodiment, the valve core 1122 is a gravity ball, and the gravity ball is movably disposed in the accommodating cavity along the vertical direction and abuts against the air outlet, if the pressure in the pressure cooking cavity 210 is large enough, the valve core 1122 on the air outlet is pushed open to perform the pressure relief operation, that is, the size of the pressure relief threshold value can be adjusted by controlling the weight of the gravity ball. The safety cap 1121 is provided with a gas release opening 1126, so that the gas released from the gas release passage 111 can enter the outside through the gas release opening 1126, or the gas release opening 1126 may be provided between the safety cap 1121 and the face cover to facilitate the release of the released gas out of the cover body 100.

In order to ensure that the valve core 1122 and the top of the float 110 have sufficient sealing effect before reaching the pressure relief threshold, the top end of the float 110 is provided with a concave surface 113 matched with the gravity ball, and the air outlet is positioned at the bottom end of the concave surface 113, so that the gravity ball naturally falls by gravity to be matched with the concave surface 113 to form sealing, and the air outlet is blocked below the gravity ball.

Because the float 110 needs to float up and down relative to the cover body 100, the cover body 100 basically comprises an inner cover and an outer cover, the thickness of the inner cover is relatively thin, therefore, the mounting table 130 is fixed on the inner cover, the mounting table 130 is provided with a sliding hole 131 matched with the float 110, the up-and-down floating track of the float 110 is limited by the sliding on the mounting table 130, and the function that the float 110 slides off or is accidentally stuck to cause failure can be prevented. The friction between the float 110 and the sliding hole 131 needs to be reduced as much as possible, the float 110 comprises a rod body 114 and a sliding block 115, the sliding block 115 can reduce the friction between the float 110 and the sliding hole 131 when the float 110 floats up and down, the rod body 114 vertically penetrates through the sliding block 115, the sliding block 115 is located in the middle of the rod body 114, and the diameter of the sliding block 115 is larger than that of the rod body 114, so that the rod body 114 is prevented from contacting the sliding hole 131, and the sliding friction of the float 110 is reduced. Also because of the above design of the float 110, the bottom of the sliding hole 131 can be provided with the limit boss 132 extending toward the center of the sliding hole 131, the limit boss 132 contacts the bottom surface of the slider 115 to lift the slider 115, before the pressure in the pressure cooking chamber 210 is not raised, the float 110 is prevented from falling into the pressure cooking chamber 210, the initial position of the float 110 is fixed, the opening stop rod 120 is provided with the lock hole 121, when the float 110 is in the initial state, the upper part of the rod body 114 passes through the lock hole 121, but the top of the slider 115 abuts against the opening stop rod 120, only after the cover body 100 and the appliance body 200 are completely screwed, the lock hole 121 is positioned right above the slider 115, after the float 110 receives the pressure in the pressure cooking chamber 210, the slider 115 passes through the lock hole 121 to lock the position of the opening stop rod 120, and the opening stop rod 120 is prevented from retreating, that is, the relative position of the appliance body 200 and the cover body 100 is locked before the pressure in the pressure cooking chamber 210 does not reach the safe value.

An inner cover of the cover body 100 is provided with a mounting hole, an outer side wall of the mounting table 130 is provided with an external thread, and the mounting table 130 is connected to the cover body 100 through a thread. Of course, a packing 133 is further provided between the mounting table 130 and the cover body 100 in order to prevent the pressure in the pressure cooking chamber 210 from leaking between the cover body 100 and the mounting table 130. In addition, a sealing ring 133 is also provided at the bottom of the rod 114 of the float 110, when the apparatus body 200 is completely screwed with the cover body 100, the pressure in the pressure cooking chamber 210 pushes up the float 110, and the sealing ring 133 provided at the bottom of the float 110 seals the sliding hole 131 of the mounting table 130, thereby preventing gas from leaking from the sliding hole 131.

When the appliance body 200 and the cover body 100 are not screwed in place, the locking hole 121 of the opening stop rod 120 cannot completely move to the position right above the sliding block 115, at this time, the top surface of the sliding block 115 still abuts against the bottom surface of the opening stop rod 120, after the pressure cooking cavity 210 starts to be pressed, the sliding block 115 abuts against the opening stop rod 120, the opening stop rod 120 prevents the floater 110 from floating upwards, at this time, the exhaust channel 111 on the floater 110 is communicated with the pressure cooking cavity 210, and as the pressure in the pressure cooking cavity 210 continuously rises, the finally generated pressure is greater than the gravity of the gravity ball to jack the gravity ball, at this time, the gas in the pressure cooking cavity 210 is discharged out of the cover body 100 from the gas outlet of the exhaust channel 111 through a pressure relief opening, so that the pressure in the pressure cooking cavity 210 is not too high, the use safety of a user is protected, and the pressure cooking appliance is in a relatively low-pressure cooking state. As shown in fig. 4, if the appliance body 200 and the lid 100 are screwed in place, the locking hole 121 of the opening preventing rod 120 is completely located right above the sliding block 115, after the pressure in the pressure cooking chamber 210 rises, the float 110 will be driven to float upwards along with the rising of the internal pressure, the sliding block 115 will pass through the locking hole 121 to lock the appliance body 200 and the lid 100, so as to prevent the user from being injured by accidentally opening the lid 100, the pressure in the pressure cooking chamber 210 will be controlled by the pressure relief valve on the lid 100, and the pressure cooking appliance is in a relatively high pressure cooking state.

Example two:

as shown in fig. 5 and 6, the difference from the first embodiment is that, the valve core 1122 in this embodiment is an elastic membrane, the elastic membrane includes a fixing portion 1124 and a sealing portion 1125, the fixing portion 1124 is fixed on the float 110 and can be annularly sleeved on the top of the float 110, the sealing portion 1125 covers the air outlet to seal the air outlet, the sealing portion 1125 is elastically connected to the fixing portion 1124, the elastic magnitude controls the pressure in the pressure cooking cavity 210 when the appliance body 200 and the cover 100 are not screwed in place, the entire elastic membrane can be integrally made of an elastic material, such as spring steel or rubber, and when the pressure in the pressure cooking cavity 210 is sufficiently large, the sealing portion 1125 is pushed open to swing relative to the fixing portion 1124, so as to release the space for pressure relief.

Other contents not described in this embodiment may refer to embodiment one.

Example three:

as shown in fig. 7 and 8, the difference from the first embodiment is that, unlike the first embodiment, the valve core 1122 is a diaphragm in this embodiment, the diaphragm is hermetically connected to the top end of the float 110 by bonding or the like, a pressure relief slit 1127 corresponding to the position of the air outlet is formed in the diaphragm, and in a half-locked state, when the pressure in the pressure cooking chamber 210 is too high, the air pressure in the pressure cooking chamber 210 pushes the pressure relief slit 1127 open through the air exhaust channel 111 in the float 110 to relieve the pressure, so that the pressure relief pressure in the pressure cooking chamber 210 can be precisely controlled by controlling parameters such as the material of the diaphragm, the thickness of the pressure relief slit 1127, and the like.

Other contents not described in this embodiment may refer to embodiment one.

The above description is only for the specific embodiments of the present invention, but the technical features of the present invention are not limited thereto, and any person skilled in the art can make changes or modifications within the scope of the present invention.

Claims (10)

1. A safe pressure cooking appliance comprises an appliance body and a cover body, wherein the cover body is buckled on the appliance body to form a pressure cooking cavity, the cover body is provided with a floater and a movable opening stopping rod, the floater floats up and down along with the pressure change in the pressure cooking cavity, the opening stopping rod is limited to move by the floating of the floater, the safe pressure cooking appliance is characterized in that the floater is provided with an exhaust channel and a safety valve for controlling the on-off of the exhaust channel, when the floater floats upwards under the limitation of the opening stopping rod, the exhaust channel is communicated with the pressure cooking cavity, and the safety valve is opened when the pressure in the exhaust channel is greater than a preset value.

2. A safety in use pressure cooking appliance as claimed in claim 1, wherein: the safety valve comprises a safety cap and a valve core, the safety cap is fixed on the cover body, an accommodating cavity is formed in the safety cap, the valve core is located in the accommodating cavity, the top end of the floater is provided with an air outlet of an exhaust channel, and the valve core controls the on-off of the air outlet.

3. A safety in use pressure cooking appliance as claimed in claim 2, wherein: the valve core is a gravity ball, the gravity ball is in a containing cavity moving along the vertical direction, and the gravity ball abuts against the air outlet.

4. A safety in use pressure cooking appliance as claimed in claim 3, wherein: the top of float is equipped with the concave surface with gravity ball looks adaptation, the gas outlet is located the bottom of concave surface.

5. A safety in use pressure cooking appliance as claimed in claim 2, wherein: the valve core is a diaphragm, the diaphragm is connected to the top end of the floater in a sealing mode, and a pressure relief seam corresponding to the position of the air outlet is formed in the diaphragm.

6. A safety in use pressure cooking appliance as claimed in any one of claims 2 to 5, wherein: the safety cap is provided with an air release port; or an air leakage opening is formed between the safety cap and the surface cover.

7. A safety in use pressure cooking appliance as claimed in claim 1, wherein: the cover body is further fixed with an installation platform, a sliding hole matched with the floater is formed in the installation platform, and a limiting boss for limiting the downward movement distance of the floater is arranged at the bottom of the sliding hole.

8. A safety in use pressure cooking appliance as claimed in claim 7, wherein: the floater comprises a rod body and a sliding block arranged in the middle of the rod body, the rod body penetrates through the sliding hole, and the sliding block is in sliding fit with the sliding hole.

9. A safety in use pressure cooking appliance as claimed in claim 8, wherein: and the opening stop rod is provided with a lock hole matched with the slide block.

10. A safety in use pressure cooking appliance as claimed in claim 7, wherein: the cover body is provided with a mounting hole, the mounting table is in threaded connection with the mounting hole, and a sealing ring is further arranged between the mounting table and the cover body.

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