CN220141453U - Air fryer - Google Patents

Abstract

The utility model relates to an air fryer. The pressure release assembly of the existing air fryer has a complex structure. The cooking device comprises a base and a cover body, wherein the base is internally provided with a pot body, the cover body is covered on the pot body and surrounds the pot body to form a cooking cavity, the bottom of the cover body is provided with a hot air component, hot air generated by the hot air component is input into the pot body to cook food materials in the cooking cavity, the cover body is provided with an exhaust port, the exhaust port is provided with a pressure relief component, the pressure relief component comprises a flexible piece which can be opened and closed under stress, and the flexible piece is deformed under pressure to form a pressure relief port which is communicated with the cooking cavity and an external space. The pressure relief assembly with the flexible part is arranged on the exhaust port, the flexible part can form a pressure relief opening through deformation when being pressed, and the deformation is recovered after the air pressure in the cooking cavity is returned, so that the redundant air in the cooking cavity is effectively discharged, the pressure relief assembly structure is effectively simplified, the production and the assembly are convenient, the cooking cavity can be always maintained in a micro-pressure state, and the cooking experience is promoted.

Description

Air fryer

Technical Field

The utility model relates to the field of food processing, in particular to an air fryer.

Background

The patent with the publication number of CN107361658A discloses an air fryer, which comprises a base and a cover body, wherein a pot body is arranged in the base, a hot air component is arranged at the bottom of the cover body, the cover body is covered on the pot body and encloses to form a cooking cavity, and hot air generated by the hot air component is input into the pot body to cook food materials in the cooking cavity. The air pressure sensor is arranged in the cooking cavity, the air pressure sensor senses the air pressure in the cooking cavity and adjusts and controls the air pressure, the air fryer adjusts the air pressure in the cooking cavity, the structure is complex, the production cost and the maintenance cost are both high, the air fryer is also caused to easily fail to adjust the air pressure in the cooking cavity due to the failure of the air pressure sensor, and the use experience is affected.

In addition, disclose an air fryer in the patent of publication number CN209437012U, but the sealing member on the culinary art chamber is the mounting that can not bare-handed dismantlement, leads to the air fryer unable switching between ordinary pressure state or micropressure state as required when using, and then leads to the user unable cooking taste that promotes edible material through adjusting the intracavity atmospheric pressure of culinary art, influences the use experience.

Disclosure of Invention

In order to solve the defects in the prior art, the utility model provides the air fryer, wherein the pressure relief assembly with the flexible piece is arranged on the cover body in a isomorphic manner to adjust the air pressure in the cooking cavity, so that the cooking cavity can be used in a micro-pressure state, the structure of the pressure relief assembly is simplified, the production and the maintenance are convenient, the pressure relief sensitivity is good, the air pressure in the cooking cavity is ensured to be always maintained in the micro-pressure state, and the cooking experience is improved.

The utility model is realized by the following modes: the utility model provides an air fryer, includes base and lid, be equipped with the pot body in the base, the lid closes on the pot body and encloses and close and form the culinary art chamber, the lid bottom is equipped with hot air subassembly, the hot-blast material in the cooking intracavity of the hot-blast input pot body in order to make that hot-blast subassembly produced, be equipped with the gas vent on the lid, gas vent department is equipped with pressure release subassembly, pressure release subassembly is including the flexible piece that can atress switching, and flexible piece pressurized deformation forms the pressure release mouth that communicates culinary art chamber and external space. The pressure release assembly with the flexible part is arranged on the exhaust port, the flexible part can form a pressure release opening through deformation when being pressed, the deformation is recovered after the air pressure in the cooking cavity is returned, the redundant air in the cooking cavity is effectively discharged outwards, the cooking cavity is used for exhausting air in a directional mode through the pressure release opening and maintaining a micro-pressure state, the structure of the pressure release assembly is effectively simplified, the production and the assembly are convenient, the cooking cavity is ensured to be always maintained in the micro-pressure state, the pressure release sensitivity of the pressure release assembly is ensured, and the cooking experience is improved.

Preferably, the flexible piece comprises two flexible sheets which can be reset and abutted to be attached, and the flexible sheets are separated from each other and form the pressure relief opening when being deformed under the force. The flexible piece is contradicted through the laminating and is plugged up the gas vent for cooking cavity and external space are isolated, do benefit to and form the micropressure state in cooking cavity, when cooking cavity intracavity air pressure rose, the flexible piece can be mutually separated and form the pressure release mouth under the atmospheric pressure is pushed, the unnecessary air of cooking cavity of being convenient for is arranged outward.

Preferably, the flexible member comprises a flexible sheet with a notch in the middle, and the notch is deformed by force and forms the pressure relief opening. The flexible sheet completely seals the exhaust port, the edge of the notch can be deformed by force to form the pressure relief opening, and the sealing is realized by resetting after the redundant air in the cooking cavity is discharged, so that the cooking cavity is ensured to be maintained in a micro-pressure state.

Preferably, the pressure release assembly is switchable between a first use state in which the exhaust port is blocked and a second use state in which the exhaust port is exposed, so that the cooking cavity is switched between a micro-pressure state and a normal-pressure state. The pressure relief assembly is detachably arranged on the exhaust port, the pressure relief assembly can be used in a first use state of sealing the exhaust port, the cooking cavity is in a micro-pressure state and can be used in a second use state of separating from the exhaust port, the cooking cavity and the external space are communicated through the exhaust port and are in a normal pressure state, a user can select to use the pressure relief assembly as required, the application range of the air fryer is widened, and the use experience is improved.

Preferably, the pressure relief assembly includes a connector by which the flexible member is detachably mounted to the vent. The connecting piece can be with gas vent sealing connection for the pressure release subassembly switches to first service condition, can also break away from the gas vent with the connecting piece, makes the pressure release subassembly switch to second service condition, and in addition, the setting of flexible piece is on the connecting piece, ensures that the flexible piece plays control gas vent and external space switching intercommunication's effect.

Preferably, the exhaust port is an exhaust pipe exposed out of the top surface of the cover body, the connecting piece is a cover, the top of the cover is provided with a flexible piece, and the bottom of the cover is fixed on the exhaust pipe. One end of the exhaust pipe is communicated with the cooking cavity, the other end of the exhaust pipe is communicated with the external space, and the cover is sleeved on the exhaust pipe through the lower port, so that the disassembly and assembly operations are convenient.

Preferably, the outer edge of the bottom of the cover is connected with the exhaust pipe through a rotating shaft, and the cover rotates or overturns around the rotating shaft, so that the pressure relief assembly is switched between a first use state and a second use state. The cover swings with the rotating shaft as the center, so that the cover can be switched between a first use state of being sleeved on the exhaust port and a second use state of being separated from the exhaust port, and the cover is connected to the exhaust pipe through the rotating shaft, so that the cover is prevented from being lost due to separation from the exhaust pipe.

Preferably, the exhaust port is an exhaust hole formed in the cover body, the connecting piece is a connecting ring, and the flexible piece is arranged at the inner edge of the connecting ring. The connecting ring is embedded in the exhaust hole, so that the top surface of the cover body is smooth, the attractiveness is improved, and the flexible piece positioned in the connecting ring can be used for blocking the exhaust hole.

Preferably, an annular caulking groove is formed in the outer edge of the connecting ring, and the connecting ring is sleeved on the periphery of the exhaust hole through the caulking groove. The caulking groove can be sleeved on the periphery of the exhaust hole, so that the connection reliability is ensured, and the sealing performance is improved by increasing the contact area.

Preferably, the outer edge of the connecting ring is connected with the cover body through a rotating shaft, the outer edge diameter of the connecting ring is larger than the diameter of the exhaust hole, and the connecting ring rotates or overturns by taking the rotating shaft as the center, so that the pressure release assembly can be switched between a first use state and a second use state. The rotating shaft is perpendicular to the cover body, so that the connecting ring can move along the surface of the cover body along with the flexible piece, and then the first use state and the second use state are switched.

The utility model has the beneficial effects that: the pressure release assembly with the flexible part is arranged on the exhaust port, the flexible part can form a pressure release opening through deformation when being pressed, and the deformation is recovered after the air pressure in the cooking cavity is returned, so that the redundant air in the cooking cavity is effectively discharged, the pressure release assembly structure is effectively simplified, the production and the assembly are convenient, the cooking cavity can be always maintained in a micro-pressure state, the pressure release sensitivity of the pressure release assembly is ensured, and the cooking experience is improved.

Drawings

FIG. 1 is a schematic diagram of an air fryer according to an embodiment;

FIG. 2 is a schematic cross-sectional view of an assembled structure of a pressure relief assembly according to the second embodiment;

FIG. 3 is a schematic diagram of a pressure relief assembly according to a second embodiment;

FIG. 4 is a schematic diagram of an air fryer according to a third embodiment;

fig. 5 is a schematic structural diagram of a pressure relief assembly according to a third embodiment;

FIG. 6 is a schematic diagram of another embodiment of a pressure relief assembly;

FIG. 7 is a schematic diagram showing a disassembled structure of an air fryer according to a fourth embodiment;

FIG. 8 is a schematic cross-sectional view of an assembled structure of a pressure relief assembly according to the fourth embodiment;

FIG. 9 is a schematic cross-sectional view of another assembled structure of a pressure relief assembly according to the fourth embodiment;

FIG. 10 is a schematic cross-sectional view of another assembled structure of a pressure relief assembly according to the fourth embodiment;

in the figure: 1. the device comprises a base, 2, a cover body, 21, an exhaust pipe, 22, an exhaust hole, 3, a pressure relief assembly, 31, a pressure relief opening, 32, a flexible sheet, 33, a connecting piece, 331, a caulking groove, 34 and a rotating shaft.

Detailed Description

The essential features of the utility model are further described in connection with the accompanying drawings and the detailed description.

Embodiment one:

the present embodiment provides an air fryer.

The air fryer shown in fig. 1 comprises a base 1 and a cover body 2, wherein the base 1 is internally provided with a pot body, the cover body 2 is covered on the pot body and encloses to form a cooking cavity, the bottom of the cover body 2 is provided with a hot air component, hot air generated by the hot air component is input into the pot body to cook food materials in the cooking cavity, the cover body 2 is provided with an exhaust port, the exhaust port is provided with a pressure relief component 3, the pressure relief component 3 comprises a flexible piece capable of being opened and closed under stress, and the flexible piece is deformed under pressure and forms a pressure relief port 31 which is communicated with the cooking cavity and an external space.

In this embodiment, the air fryer comprises a base 1 and a lid 2, the lid 2 being switchable between an open position and a closed position. The rear edge of the base 1 is connected with the rear edge of the cover body 2 through a hinge, so that the cover body 2 can swing and switch between an opening station and a closing station in a preset path. When the cover body 2 is in the opening station, the cooking cavity is exposed through the top surface of the base 1, so that the food materials of the pot body can be conveniently taken and placed, the cleaning operation is also convenient, and when the cover body 2 is in the closing station, the cover body 2 covers the upper part of the base 1 and encloses with the pot body to form the cooking cavity.

In this embodiment, a hot air cavity is provided in the middle of the bottom surface of the cover body 2, and the hot air component is disposed in the hot air cavity. The hot air assembly comprises a fan and a heating element, the heating element is positioned at the periphery of the fan, the rotating fan extracts air in the cooking cavity and forms air flow flowing through the heating element, the air flow absorbs heat and forms hot air flowing back to the cooking cavity, and the hot air can be contacted with food materials after flowing into the cooking cavity and realize heat transfer, so that the food materials are gradually cooked from outside to inside. The temperature of the hot air is reduced due to contact with the food materials and the hot air is diffused into the cooking cavity, so that an air source is provided for the hot air component to extract and heat again, and the air is circularly extracted and heated to improve the heat utilization efficiency.

In this embodiment, the cover 2 is provided with an air outlet, so that the air pressure in the cooking cavity rises due to the temperature rise, and the redundant air is discharged outside through the air outlet, so that the cooking cavity is ensured not to have potential safety hazards due to the excessively high air pressure in the cooking cavity. The pressure release component 3 for adjusting and controlling the air pressure in the cooking cavity is arranged on the air outlet, so that the air pressure in the cooking cavity is maintained in a micro-pressure state. The pressure relief assembly 3 is used for preventing air in the cooking cavity from leaking, ensuring that the air pressure in the cooking cavity is higher than the lower limit value of the micro-pressure state, discharging redundant air in the cooking cavity in time, and ensuring that the air pressure in the cooking cavity is lower than the upper limit value of the micro-pressure state, so that the air pressure in the cooking cavity is stably maintained in the micro-pressure state. The existing pressure relief assembly 3 comprises a pressure sensor, a control valve and other structures, and has the problems of high equipment cost, complex structure and troublesome maintenance, and the pressure relief assembly 3 is easy to cause the condition that a cooking cavity cannot be stably maintained in a micro-pressure state due to faults, so that the use experience is affected. Therefore, the pressure relief assembly 3 is improved, a flexible part capable of resetting and closing the seal is arranged on the pressure relief assembly 3, the flexible part forms the pressure relief opening 31 through deformation when being pressed, and the reset seal is realized by utilizing self elasticity, the flexible part can sense the air pressure in the cooking cavity and form the pressure relief opening 31 through deformation after the air pressure exceeds a threshold value, the cooking cavity is ensured to be exhausted directionally through the pressure relief opening 31 and maintain a micro-pressure state, the air pressure in the cooking cavity is ensured not to exceed the upper limit value of the micro-pressure state, the air outlet can be blocked through resetting after the air pressure in the cooking cavity is reduced, the condition that the air pressure in the cooking cavity is lower than the lower limit value of the micro-pressure state due to excessive exhaust is prevented, and the air pressure in the cooking cavity is ensured to be always and stably maintained in the micro-pressure state.

In this embodiment, the gas vent is offered on lid 2, and the relative position is fixed between the flexible spare of pressure release subassembly 3 and gas vent for the flexible spare can form the pressure release mouth 31 that has specific orientation when atress deformation, ensures that unnecessary air in the cooking cavity can be discharged to predetermineeing the region through pressure release mouth 31, both prevents the condition that takes place to scald the user, still prevents that the condition that the high temperature air takes place to influence the cooking operation, promotes the use experience.

Embodiment two:

in contrast to the first embodiment, the present embodiment provides a specific air fryer architecture.

As shown in fig. 2 and 3, the flexible member includes two flexible sheets 32 that can be in contact with each other in a resetting manner, and the flexible sheets 32 can be separated from each other and form the pressure relief opening 31 when being deformed under a force. The bottom of the flexible sheet 32 is separately provided and forms an opening in communication with the cooking chamber, and the top is in opposite contact and sealed engagement. When the pressure relief assembly is used, when the air pressure in the cooking cavity is lower than the upper limit value of the micro-pressure state, the air pressure in the cooking cavity cannot push the top of the flexible sheet 32 to separate, so that the pressure relief assembly 3 can effectively seal an exhaust port, and the air in the cooking cavity is ensured to raise the air pressure through temperature rise; when the air pressure in the cooking cavity rises and is higher than the upper limit value of the micro-pressure state, the air pressure in the cooking cavity pushes the top of the flexible sheet 32 to separate and form the pressure relief opening 31, so that the redundant air in the cooking cavity is discharged to a preset area through the pressure relief opening 31 in an oriented way, and the cooking cavity is ensured to be stably maintained in the micro-pressure state.

In this embodiment, the pressure relief assembly 3 may be switched between a first use state in which the air outlet is blocked and a second use state in which the air inlet and the air outlet are exposed, so that the cooking cavity is switched between a micro-pressure state and a normal-pressure state. The pressure relief assembly 3 is detachably mounted on the exhaust port and is switchable between a first use state and a second use state. Specifically, when the pressure relief assembly 3 is in a first use state of being installed on the exhaust port, the pressure relief assembly 3 plays a role in blocking the exhaust port, and air in the cooking cavity is accumulated due to the fact that the air cannot be effectively discharged outwards, so that the cooking cavity can be switched to a micro-pressure state; when the pressure relief assembly 3 is in the second use state separated from the exhaust port, the cooking cavity is communicated with the external space through the exhaust port, so that the cooking cavity can be stably maintained in a normal pressure state due to the fact that excessive air can be timely discharged outwards through the exhaust port. The user can select and control the cooking cavity to switch between the micro-pressure state and the normal-pressure state according to the type of food materials to be cooked, so that the application range of the air fryer is effectively enlarged.

In this embodiment, the pressure relief assembly 3 includes a connector 33, and the flexible member is detachably mounted on the exhaust port by the connector 33. The connecting piece 33 is connected with the flexible piece, so that the cooking cavity can conveniently exhaust the air outwards by using the pressure relief opening 31, and is also connected with the air outlet, so that the pressure relief assembly 3 can be conveniently disassembled and assembled, and the pressure relief assembly can be switched between a first using state and a second using state.

In this embodiment, the exhaust port is an exhaust pipe 21 exposed on the top surface of the cover 2, the connecting member 33 is a cover, the top of the cover is provided with a flexible member, and the bottom of the cover is fixed on the exhaust pipe 21. The exhaust pipe 21 is exposed out of the top surface of the cover body 2, so that directional exhaust is realized, the connection area between the exhaust pipe and the cover cap can be increased, and the connection tightness is improved. The bottom ends of the flexible pieces are respectively sleeved on two opposite edges of the upper port of the cover cap, so that the upper port of the cover cap is blocked.

In this embodiment, the outer edge of the bottom of the cover is connected to the exhaust pipe 21 through a rotating shaft 34, and the cover rotates or turns around the rotating shaft 34, so that the pressure relief assembly 3 is switched between a first use state and a second use state. Specifically, the cover can reciprocally rotate about the rotation shaft 34: when the lower port of the cover is sleeved on the upper port of the exhaust pipe 21, the bottom of the cover is communicated with the top of the exhaust pipe 21 in a sealing way, and the flexible sheet 32 is used for opening and closing to control the air pressure in the cooking cavity, so that the cooking cavity is ensured to be maintained in a micro-pressure state; when the lower port of the cover is separated from the exhaust pipe 21, the upper port of the exhaust pipe 21 is exposed and communicated with the cooking cavity, and the excessive air in the cooking cavity is discharged outwards through the exhaust pipe 21 in a directional manner, so that the cooking cavity is ensured to be maintained in a normal pressure state.

In this embodiment, the flexible piece is a silica gel piece or a rubber piece, and the flexible piece has an elastic resetting performance, so that the flexible piece deforms when being pushed by external force, and automatically resets and deforms when the external force is removed.

It should be understood that the shaft 34 may be disposed parallel to the surface of the cover 2 to enable the cover to move in a flip-flop manner, and may be disposed perpendicular to the surface of the cover 2 to enable the cover to rotate to prevent movement, which is considered as a specific implementation of the present embodiment.

Other structures and effects of the air fryer in this embodiment are the same as those of the embodiment, and will not be described again.

Embodiment III:

in contrast to the second embodiment, the present embodiment provides another air fryer configuration.

As shown in fig. 4 and 5, the flexible member includes a flexible sheet 32 with a repositionable slit in the middle that deforms under force and forms the relief opening 31. The flexible sheet 32 can completely seal the inner cavity of the connecting piece 33, so that the communication state of the exhaust port is influenced by the deformation state of the incision. When the edges of the cut are attached, the pressure relief opening 31 disappears, so that the pressure of the cooking cavity is increased; when the edges of the cut are separated due to the force, the pressure relief opening 31 is formed, which is beneficial to the reduction of the air pressure of the cooking cavity by discharging the redundant air. When the cooker is used, the edges of the notch can be separated after being deformed under stress to form the pressure relief opening 31, so that the extra air in the cooking cavity is discharged, and the cooking cavity is kept in a micro-pressure state.

In this embodiment, the shape of the incision may be a straight shape, a cross shape, or the like, as long as the incision can completely seal the exhaust port when resetting, which should be regarded as a specific implementation manner of this embodiment.

It will be appreciated that the flexible member can be rotatably mounted to the exhaust pipe by a horizontally disposed swivel shaft 34 (as shown in fig. 6) such that the flexible member can swing along the top surface of the cover and switch between a first use position and a second use position, and should also be considered as a specific implementation of this embodiment.

Other structures and effects of the air fryer in this embodiment are the same as those of the second embodiment, and will not be described again.

Embodiment four:

in contrast to the second embodiment, the present embodiment provides another air fryer configuration.

As shown in fig. 7, the exhaust port is an exhaust hole 22 formed on the cover 2, the connecting piece 33 is a connecting ring, and the flexible piece is disposed on the inner edge of the connecting ring. The exhaust hole 22 is hidden in the cover body 2, so that the top surface of the cover body 2 is smooth, and the attractiveness is improved. The connecting piece 33 and the flexible piece are of an integrated structure, so that the processing is convenient, and the disassembly and the assembly are convenient.

In this embodiment, an annular caulking groove 331 (as shown in fig. 8) is formed on the outer edge of the connection ring, and the connection ring is sleeved on the periphery of the exhaust hole 22 through the caulking groove 331. When in use, the connecting ring is inserted into the exhaust hole 22 and sleeved on the periphery of the exhaust hole 22 through the caulking groove 331, so as to ensure that the flexible piece plays a role in blocking the exhaust hole 22.

It will be appreciated that the flexible member is a flexible sheet 32 (shown in fig. 9) with a slit disposed within the connecting ring and serving to block the vent hole 22, and should also be considered as a specific implementation of this embodiment.

It can be understood that the outer edge of the connecting ring is connected with the cover 2 through the rotating shaft 34, the outer edge diameter of the connecting ring is larger than the diameter of the exhaust hole 22, and the connecting ring rotates or turns around the rotating shaft 34, so that the pressure release assembly 3 can be switched between the first use state and the second use state, which should also be regarded as a specific implementation of the embodiment. Specifically, the pressure relief assembly 3 can move along the surface of the cover 2 and switch between a first use state in which the vent hole 22 is blocked and a second use state in which the vent hole 22 is exposed. The pivot 34 perpendicular to lid 2 top surface sets up (as shown in fig. 10), pivot 34 bottom is inserted in lid 2, and the top is inserted in the outer fringe of go-between for the go-between can take the flexible piece to carry out reciprocating rotation with pivot 34 as the center, both made things convenient for pressure release subassembly 3 to switch between first service condition and second service condition, still effectively prevented pressure release subassembly 3 to take place because of breaking away from exhaust hole 22 and take place the condition of losing, promoted the use experience.

It should be understood that the shaft 34 may be disposed parallel to the surface of the cover 2 to enable the connection ring to move in a flip manner, and may be disposed perpendicular to the surface of the cover 2 to enable the connection ring to rotate to prevent movement, which should be regarded as a specific implementation of the present embodiment.

Other structures and effects of the air fryer in this embodiment are the same as those of the second embodiment, and will not be described again.

Claims (10)

1. The utility model provides an air fryer, includes base and lid, be equipped with the pot body in the base, the lid closes on the pot body and encloses and close and form the culinary art chamber, the lid bottom is equipped with hot air subassembly, the hot-blast material in the cooking intracavity of the hot-blast input pot body in order to make of hot-blast subassembly production, a serial communication port, be equipped with the gas vent on the lid, gas vent department is equipped with the pressure release subassembly, the pressure release subassembly includes the flexible piece that can atress switching, and the flexible piece is pressed deformation and is formed the pressure release mouth that communicates culinary art chamber and external space.

2. The air fryer of claim 1, wherein said flexible member comprises two flexible sheets that are in a repositionable interference fit, said flexible sheets being configured to disengage and form said pressure relief opening when deformed under force.

3. An air fryer according to claim 1, wherein said flexible member comprises a flexible sheet with a cutout in the middle, said cutout being deformed by force and defining said relief opening.

4. An air fryer according to any one of claims 1-3, wherein said pressure relief assembly is switchable between a first use condition in which said vent is blocked and a second use condition in which said vent is uncovered, to switch said cooking chamber between a micro-pressure condition and an atmospheric condition.

5. The air fryer according to claim 4, wherein said pressure relief assembly includes a connector, said flexible member being detachably mounted to said vent via said connector.

6. The air fryer of claim 5, wherein said exhaust port is an exhaust pipe exposed at the top surface of the lid, said connector is a cover, said cover has a flexible member at its top and is secured to said exhaust pipe at its bottom.

7. The air fryer according to claim 6, wherein said cover is coupled to the exhaust pipe by a shaft, said cover being rotated or flipped about the shaft to switch the pressure relief assembly between the first operational configuration and the second operational configuration.

8. The air fryer of claim 5, wherein said vent is an exhaust vent formed in the lid, said connector is a connector ring, and said flexible member is disposed on the inner edge of said connector ring.

9. The air fryer of claim 8, wherein said attachment ring has an annular groove on its outer periphery, said attachment ring being positioned around the perimeter of said vent hole by said groove.

10. The air fryer of claim 8, wherein the outer edge of said connecting ring is connected to the lid by a shaft, the outer edge of said connecting ring has a diameter greater than the diameter of the vent hole, and said connecting ring rotates or turns about the shaft to switch the pressure relief assembly between the first and second operational conditions.