CN112773187A - Pressure cooker and pressure release device thereof - Google Patents

Abstract

The invention discloses a pressure cooker and a pressure release device thereof, wherein the pressure release device comprises a centrifugal impeller and a housing, and the centrifugal impeller can rotate around a preset axis; the encloser is covered on the periphery of the centrifugal impeller and used for forming an isolation cavity, the encloser is provided with a flow guide part corresponding to the centrifugal impeller, one end of the flow guide part is communicated with the isolation cavity, the other end of the flow guide part is communicated with the outside of the encloser, and a gas-liquid mixture flows into the isolation cavity through the flow guide part under the action of the internal-external pressure difference of the encloser and acts on the centrifugal impeller so as to drive the centrifugal impeller to rotate to realize gas-liquid separation of the gas-. The pressure release device can continuously exhaust to release pressure, effectively shortens the uncovering time of the pressure cooker, has higher safety, can save a driving mechanism, has simple structure, is easy to realize, and can save a large amount of cost.

Description

Pressure cooker and pressure release device thereof

Technical Field

The invention relates to the technical field of kitchen appliances, in particular to a pressure cooker and a pressure release device thereof.

Background

The pressure cooker applies pressure to water contained in the pressure cooker by utilizing the principle that the boiling point of liquid is higher under higher air pressure, so that the water can reach higher temperature without boiling, the aim of accelerating the speed of stewing food materials can be fulfilled, and the cooking time is saved. After cooking is completed, it is usually necessary to release the pressure inside the pressure cooker, so that the pressure inside the pressure cooker is the same as the external atmospheric pressure, and the risk of scalding due to food overflow is avoided.

The inventor of the present application found in long-term research and development that, in the process of releasing pressure, the pressure inside the pressure cooker is rapidly reduced to cause the temperature of the liquid inside the pressure cooker to be higher than the boiling point temperature of the liquid, so that partial liquid vaporization occurs, when the liquid has a certain viscosity, the gas formed by vaporization expands from the inside of the liquid, bubbles are generated, and the liquid or solid particles on the bubbles are ejected along with the gas, which affects the safety and cleanliness of the pressure cooker. At present, the pressure in the pressure cooker is reduced mainly by intermittent exhaust or a method of cooling the temperature in the pressure cooker, the cover can be opened only for a long time, and the common exhaust needs to be driven by a motor, so that the cost is high.

Disclosure of Invention

The invention provides a pressure cooker and a pressure release device thereof, and aims to solve the technical problems that in the prior art, liquid and/or solid is easy to spray gas in the pressure cooker pressure release process, potential safety hazards and inconvenience in cleaning are caused, and the exhaust cost is high due to the adoption of a motor for driving.

In order to solve the above technical problem, one technical solution adopted by the present invention is to provide a pressure relief device, including:

the centrifugal impeller can rotate around a preset axis;

the cover is covered on the periphery of the centrifugal impeller and used for forming an isolation cavity, a flow guide part corresponding to the centrifugal impeller is arranged on the cover, one end of the flow guide part is communicated with the isolation cavity, the other end of the flow guide part is communicated with the outside of the cover, and a gas-liquid mixture flows into the isolation cavity and acts on the centrifugal impeller through the flow guide part under the action of the internal-external pressure difference of the cover, so that the centrifugal impeller is driven to rotate to realize gas-liquid separation of the gas-liquid mixture.

In a particular embodiment, the centrifugal impeller comprises:

a base plate;

first blades provided on one main surface of the base plate for generating a centrifugal force during rotation of the centrifugal impeller to separate gas and liquid of the gas-liquid mixture;

and the second blades protrude out of the periphery of the bottom plate along the radial direction of the axis, and the gas-liquid mixture acts on the second blades so as to enable the centrifugal impeller to rotate.

In a specific embodiment, the number of the second blades is smaller than the number of the first blades, and the second blades are connected to a part of the first blades.

In a specific embodiment, each of the second blades is connected to at least two of the first blades adjacently disposed in a circumferential direction of the axis.

In a specific embodiment, the pressure release device further includes an upper cover, the upper cover is disposed on a side of the first blade away from the bottom plate, the housing is connected to the upper cover so that the centrifugal impeller is accommodated in the isolation cavity, the centrifugal impeller further includes a first guide ring disposed on a side of the first blade away from the bottom plate, the upper cover includes a second guide ring, and the second guide ring is located on an inner side of the first guide ring along a radial direction of the axis, so that the gas-liquid mixture flows to the first blade through a space between the first guide ring and the second guide ring, thereby achieving gas-liquid separation by a centrifugal force generated by the rotating first blade.

In a specific embodiment, the upper cover further includes a main body plate and a gas outlet disposed on the main body plate, the second baffle ring is disposed on a main surface of one side of the main body plate facing the centrifugal impeller, the gas after gas-liquid separation of the gas-liquid mixture is discharged from the gas outlet, and the liquid after gas-liquid separation is discharged along a circumferential direction of the centrifugal impeller.

In a specific embodiment, the upper cover further includes a third guide ring disposed on the main surface of the main body plate, the third guide ring is located outside the first guide ring along the radial direction of the axis, and the third guide ring and the first guide ring partially overlap with each other on the projection on the axis, so that the gas-liquid mixture flows to the first blade and the second blade through the third guide ring and the second guide ring and then through the first guide ring and the second guide ring.

In a specific embodiment, a distance between the second deflector ring and the third deflector ring is 1mm to 5mm, and a distance between the first deflector ring and the main body plate is 1mm to 5 mm.

In a particular embodiment, the bottom of the casing is tapered so as to cause the liquid on the bottom of the casing to collect towards the outer edge of the bottom of the casing, the casing being further provided with a one-way valve for opening when the amount of liquid in the casing reaches a threshold value, so as to allow the liquid to flow out.

In order to solve the technical problem, another technical scheme adopted by the invention is to provide a pressure cooker, which comprises a cooker body, a cooker cover and the pressure release device, wherein the cooker cover is covered on the cooker body, and the pressure release device is arranged on one side of the cooker cover close to the cooker body.

The centrifugal impeller is arranged, gas-liquid separation can be realized in the pressure release process through rotation of the centrifugal impeller, so that the pressure release device can continuously exhaust gas to release pressure, the cover opening time of the pressure cooker is effectively shortened, the safety is high, the centrifugal impeller is covered in a closed space through the cover, the centrifugal impeller is driven through the flow guide part and the pressure difference between the inside and the outside of the cover, a driving mechanism can be omitted, the structure is simple and easy to realize, and a large amount of cost can be saved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:

fig. 1 is a schematic perspective view of a pressure release device and a lid according to an embodiment of the pressure release device of the present invention;

FIG. 2 is a schematic cross-sectional view of a pressure relief device and a lid of a pressure relief device according to an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of one embodiment of the pressure relief device of the present invention;

FIG. 4 is a schematic perspective view of a centrifugal impeller in an embodiment of the pressure relief apparatus of the present invention;

FIG. 5 is a schematic front view of a centrifugal impeller in an embodiment of the pressure relief apparatus of the present invention;

FIG. 6 is a schematic top view of a centrifugal impeller in an embodiment of the pressure relief apparatus of the present invention;

FIG. 7 is a partial schematic view of a centrifugal impeller in an embodiment of the pressure relief apparatus of the present invention;

FIG. 8 is a schematic perspective view of an upper cover of an embodiment of the pressure relief device of the present invention;

FIG. 9 is a schematic perspective view of another embodiment of the pressure relief device and a lid of the pot of the present invention;

FIG. 10 is a front view of a pressure release device and a lid of a cooker in accordance with another embodiment of the pressure release device of the present invention;

FIG. 11 is a schematic cross-sectional view of another embodiment of the pressure relief device of the present invention;

FIG. 12 is a schematic cross-sectional view of another embodiment of the pressure relief device of the present invention;

FIG. 13 is a perspective view of a centrifugal impeller in another embodiment of the pressure relief device of the present invention;

FIG. 14 is a front view of a centrifugal impeller in another embodiment of the pressure relief device of the present invention;

FIG. 15 is a schematic top view of a centrifugal impeller in another embodiment of the pressure relief apparatus of the present invention;

FIG. 16 is a schematic perspective view of a cover in another embodiment of the pressure relief device of the present invention;

FIG. 17 is a cross-sectional view of a housing of another embodiment of the pressure relief device of the present invention;

FIG. 18 is a schematic front view of an upper cover in another embodiment of the pressure relief device of the present invention;

FIG. 19 is a schematic cross-sectional view of an upper cover in another embodiment of the pressure relief device of the present invention;

FIG. 20 is a schematic perspective view of a top cover of another embodiment of the pressure relief device of the present invention;

FIG. 21 is a perspective view of another embodiment of the pressure releasing device and the lid of the pot of the present invention;

FIG. 22 is a front view of a pressure release device and a lid of a cooker in accordance with another embodiment of the pressure release device of the present invention;

FIG. 23 is a schematic cross-sectional view of another embodiment of the pressure relief device of the present invention;

FIG. 24 is a schematic cross-sectional view of another embodiment of the pressure relief device of the present invention;

FIG. 25 is a schematic perspective view of a pressure release device and a lid of another embodiment of the pressure release device of the present invention;

FIG. 26 is a schematic cross-sectional view of another embodiment of the pressure relief device of the present invention;

FIG. 27 is a schematic front view of an anti-clog cover in another embodiment of the pressure relief device of the present invention;

FIG. 28 is a schematic cross-sectional view of an anti-clogging cap in another embodiment of the pressure relief apparatus of the present invention;

FIG. 29 is a schematic top view of an anti-clog cover in another embodiment of the pressure relief apparatus of the present invention;

fig. 30 is a schematic perspective view of a pressure cooker according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

The terms "first" and "second" in this application 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. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus. While the term "and/or" is merely one type of association that describes an associated object, it means that there may be three types of relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

Referring to fig. 1 to 6, an embodiment of the pressure relief device 10 of the present invention includes a centrifugal impeller 100 and an upper cover 200, the centrifugal impeller 100 being capable of rotating around a predetermined axis, the centrifugal impeller 100 including a base plate 110, a vane 120 disposed on a main surface of one side of the base plate 110, and a first baffle ring 130 disposed on a side of the vane 120 away from the base plate 110; the upper cover 200 covers the side of the blade 120 far from the bottom plate 110, the upper cover 200 includes a second guide ring 220, the second guide ring 220 is located at the inner side of the first guide ring 130 along the radial direction of the axis, and the projection parts of the second guide ring 220 and the first guide ring 130 on the axis are overlapped, so that the gas-liquid mixture flows to the blade through the space between the first guide ring 130 and the second guide ring 220, thereby realizing gas-liquid separation by the centrifugal force generated by the rotating blade 120.

According to the pressure release device 10 comprising the centrifugal impeller 100 and the upper cover 200, the centrifugal impeller 100 and the upper cover 200 can realize gas-liquid separation in the process of pressure release through the structural matching of the centrifugal impeller 100 and the upper cover 200, so that the pressure release device can continuously exhaust gas to release pressure, the cover opening time of the pressure cooker is effectively shortened, and the safety is high.

In this embodiment, the pressure releasing device 10 further includes a rotating shaft 140, the centrifugal impeller 100 and the upper cover 200 are both sleeved on the rotating shaft 140, and the centrifugal impeller 100 can rotate along with the rotating shaft 140. In other embodiments, the centrifugal impeller 100 can also rotate relative to the shaft 140, and is not limited herein.

In the present embodiment, the main surface of the base plate 110 is a plane, the blades 120 are further disposed perpendicular to the main surface, the number of the blades 120 is plural, and the blades are disposed at intervals in the circumferential direction around the axis in an annular region centered on the axis.

In the present embodiment, the blades 120 are arranged in an arc shape in the radial direction of the axis. Referring also to fig. 7, the liquid droplets 30 in the gas-liquid mixture are subjected to not only tangential forces of the blades 120 but also radial forces of the blades 120, as follows:

mass of droplet 30:

where ρ is the density of the droplet 30, b is the thickness of the droplet 30, r is the distance of the droplet 30 from the axis,

dr is the differential angle corresponding to the drop 30 and is the differential radius of the drop 30.

Centrifugal force to which the droplets 30 are subjected:

where ω is an angular velocity at which the centrifugal impeller 100 rotates.

Area of application of force to droplet 30:

the centrifugal force experienced by the liquid droplet 30 per unit area, i.e. the pressure difference applied by the vanes 120 to the liquid droplet 30 in the radial direction of the axis, is:

therefore, the liquid droplets 30 can be thrown out of the centrifugal impeller 100 against the pressure difference in the radial direction of the axis, and the gas-liquid separation can be preferably achieved.

In the present embodiment, the arc β of the blade 120 is 15 ° to 65 °, for example 15 °, 30 ° or 65 °.

In the present embodiment, the ratio of the length of the blade 120 in the radial direction of the axis to the maximum distance between two adjacent blades 120 is greater than 0.2, for example, 0.4, 0.5, or 1.

In this embodiment, the gas-liquid mixture may further flow directly to the blades 120 in a radial direction of the axis to achieve gas-liquid separation by centrifugal force generated by the rotating blades 120.

Referring to fig. 8, in the present embodiment, the upper cover 200 further includes a main body plate 210 and a gas outlet 211 disposed on the main body plate 210, the second baffle ring 220 is disposed on a main surface of one side of the main body plate 210 facing the centrifugal impeller 100, gas after gas-liquid separation of the gas-liquid mixture enters a space surrounded by the blades 120 from between the first baffle ring 130 and the second baffle ring 220 and between the plurality of blades 120 and is discharged from the gas outlet 211, and under the action of centrifugal force generated by the blades 120, liquid after gas-liquid separation is discharged along the circumferential direction of the centrifugal impeller 100, thereby achieving gas-liquid separation.

In this embodiment, the upper cover 200 further includes a third baffle ring 230 disposed on the main surface of the main body plate 210, the third baffle ring 230 is located outside the first baffle ring 130 along the radial direction of the axis, and the projection of the third baffle ring 230 and the first baffle ring 130 on the axis partially overlap, so that the gas-liquid mixture flows to the blades 120 through the third baffle ring 230 and the second baffle ring 220, and then through the first baffle ring 130 and the second baffle ring 220.

In the present embodiment, the overlap length of the projection of the third diaphragm ring 230 and the first diaphragm ring 130 on the axis is greater than the overlap length of the projection of the second diaphragm ring 220 and the first diaphragm ring 130 on the axis.

In the present embodiment, the distance between the second deflector ring 220 and the third deflector ring 230 may be 1mm to 5mm, for example 1mm, 3mm or 5 mm. The distance between the first deflector ring 130 and the body plate 210 may be 1mm to 5mm, for example 1mm, 2mm or 5 mm.

In this embodiment, the upper cover 200 further includes a fourth guide ring 240 disposed on the main surface of the main body plate 210, the fourth guide ring 240 is located inside the blades 120 along the radial direction of the axis, and the projection portions of the fourth guide ring 240 and the blades 120 on the axis overlap, and the fourth guide ring 240 is configured to block the gas-liquid mixture flowing between the first guide ring 130 and the second guide ring 220 from being directly output from the gas outlet 211.

In the present embodiment, the number of the blades 120 may be 3 to 60, for example, 3, 10 or 60, and the outer edges of the blades 120 are located outside the bottom plate 110, and the pressure relief device 10 further includes a driving mechanism (not shown) for driving the centrifugal impeller 100 to rotate around the axis.

In the present embodiment, the ratio of the length of the blades 120 in the radial direction of the axis to the distance of the inner ring of the annular region in the radial direction of the axis from the axis is 0.1 to 0.5, for example 0.1, 0.2 or 0.5.

In this embodiment, the distance between the inner ring of the annular region and the axis in the radial direction of the axis may be greater than or equal to 7.5mm, for example 7.5mm, 10mm or 15mm, which can generate a large centrifugal force at a certain rotation speed.

In this embodiment, the pressure relief device 10 may further include a sealing ring 150, and the sealing ring 150 is disposed at a connection portion of the centrifugal impeller 100 and the upper cover 200.

Referring back to fig. 3, specifically, when the pressure cooker needs to release pressure, the driving mechanism drives the centrifugal impeller 100 to rotate around the axis, at this time, a part of the gas-liquid mixture in the pressure cooker directly flows to the blades 120 along the radial direction of the axis, another part of the gas-liquid mixture passes through between the third guide ring 230 and the first guide ring 130, and then flows to the blades 120 through between the first guide ring 130 and the second guide ring 220, and under the action of the centrifugal force generated by the rotation of the blades 120, the gas-liquid mixture flowing to the blades 120 through two paths is separated into gas and liquid, wherein the gas continuously flows into the centrifugal impeller 100 and is discharged through the gas outlet 211; the liquid is discharged directly back into the pressure vessel along the circumference of the centrifugal impeller 100.

Referring to fig. 9 to 12, another embodiment of the pressure relief device 10 of the present invention includes a centrifugal impeller 300 and a housing 400, wherein the centrifugal impeller 300 is capable of rotating around a predetermined axis; the housing 400 is covered on the periphery of the centrifugal impeller 300 and used for forming an isolation cavity 410, a flow guide part 420 corresponding to the centrifugal impeller 300 is arranged on the housing 400, one end of the flow guide part 420 is communicated with the isolation cavity 410, the other end of the flow guide part is communicated with the outside of the housing 400, and a gas-liquid mixture flows into the isolation cavity 410 through the flow guide part 420 under the action of the internal and external pressure difference of the housing 400 and acts on the centrifugal impeller 300, so that the centrifugal impeller 300 is driven to rotate to realize gas-liquid separation of the gas-liquid mixture.

The embodiment of the invention is provided with the centrifugal impeller 300, and can realize gas-liquid separation in the pressure releasing process by the rotation of the centrifugal impeller 300, so that the pressure releasing device 10 can continuously exhaust gas to release pressure, the uncovering time of the pressure cooker is effectively shortened, the safety is higher, the centrifugal impeller 300 is covered in a closed space by arranging the cover 400, and the centrifugal impeller 300 is driven by the pressure difference between the inside and the outside of the guide part 420 and the cover 400, a driving mechanism can be omitted, the structure is simple and easy to realize, and a large amount of cost can be saved.

Referring to fig. 13 to 15 together, in the present embodiment, the centrifugal impeller 300 includes a bottom plate 310, a first blade 320, and a second blade 330, the first blade 320 being disposed at one main surface of the bottom plate 310 for generating a centrifugal force during rotation of the centrifugal impeller 300 to separate gas and liquid of a gas-liquid mixture; the second blades 330 protrude from the outer circumference of the base plate 310 in the radial direction of the axis, and the gas-liquid mixture acts on the second blades 330 to rotate the centrifugal impeller 300.

In this embodiment, the flow guiding part 420 may be a tubular nozzle, and the outlet of the nozzle faces the groove of the second vane 330 and is tangential to the outer circumference of the bottom plate 310 from the extending direction of the nozzle.

In other embodiments, the flow guiding portion 420 may also be one or more through holes (not shown) with a smaller cross-sectional area, which are disposed on the casing 400 and are opposite to the grooves of the second blades 330, through which the gas-liquid mixture can rapidly flow to the second blades 330; or the flow guiding part 420 may also be a vertical column or a cantilever arranged in the housing 400, the interior of the vertical column or the cantilever is a cavity, and the surface of the vertical column or the cantilever is provided with one or more through holes, the through holes are opposite to the grooves of the second blades 330, and the gas-liquid mixture can rapidly flow to the second blades 330 through the through holes.

In the present embodiment, the number of the second blades 330 is smaller than that of the first blades 320, and the second blades 330 are connected to a portion of the first blades 320. The number of the first blades 320 may be 3 to 60, and the number of the second blades 330 may be 3 to 20, for example, 3, 10, or 20.

In the present embodiment, each second vane 330 is connected to at least two first vanes 320 adjacently disposed in the circumferential direction of the axis.

Referring to fig. 16 to 20 together, in the present embodiment, the centrifugal impeller 300 may further include a first guide ring 340 disposed on a side of the first blade 320 away from the bottom plate 310, the pressure release apparatus 10 further includes an upper cover 500, the upper cover 500 is disposed on a side of the first blade 320 away from the bottom plate 310, the casing 400 is connected to the upper cover 500 so that the centrifugal impeller 300 is accommodated in the isolation cavity 410, the upper cover 500 includes a main body plate 510 and a second guide ring 520 disposed on a main surface of the main body plate 510, and the second guide ring 520 is located inside the first guide ring 340 along a radial direction of the axis, so that the gas-liquid mixture flows to the first blade 320 through a space between the first guide ring 340 and the second guide ring 520, thereby achieving gas-liquid separation by a centrifugal force generated by the rotating first blade 320.

The structures of the first diversion ring 340 and the upper cover 500 are referred to the first diversion ring 130 and the upper cover 200 in the pressure release apparatus 10, and are not described herein again.

In the present embodiment, the outer circumference of the main body plate 510 of the upper cover 500 is provided with an external thread 530, the inner circumference of the top of the housing 400 is provided with an internal thread 440, and the external thread 530 is engaged with the internal thread 440 to realize the connection of the upper cover 500 and the housing 400.

In this embodiment, the bottom 430 of the enclosure 400 is tapered such that liquid on the bottom 430 of the enclosure 400 collects toward the outer edges of the bottom 430 of the enclosure 400.

Referring to fig. 21 to 24, another embodiment of the pressure relief device 10 of the present invention includes a centrifugal impeller 300, an upper cover 500 and a casing 600, wherein the centrifugal impeller 300 and the upper cover 500 are configured as the centrifugal impeller 300 and the upper cover 500 in the above embodiment of the pressure relief device 10, and are not described herein again, and the casing 600 is different from the casing 400 in the above embodiment of the pressure relief device 10 in that the casing 600 may further include a check valve 610, and the check valve 610 is configured to open when the amount of liquid in the casing 600 reaches a threshold value, so as to allow the liquid to flow out.

In this embodiment, the one-way valve 610 is disposed at the bottom edge of the casing 600 to cooperate with the bottom of the conical casing 600, so that the liquid in the casing 600 can smoothly flow out and is not easily accumulated in the casing 600.

Referring to fig. 25 to 27, another embodiment of the pressure relief device 10 of the present invention includes a centrifugal impeller 700 and an anti-blocking cover 800, wherein the centrifugal impeller 700 is capable of rotating around a predetermined axis; anti-blocking cover 800 covers and is established on centrifugal impeller 700, prevents that blocking cover 800 includes first bottom plate 810 and annular curb plate 820, and annular curb plate 820 is connected with first bottom plate 810 and extends to the side direction of first bottom plate 810 to form the holding chamber that is used for holding centrifugal impeller 700, is provided with a plurality of through-holes 821 on the annular curb plate 820, and through-hole 821 is used for keeping off the particulate matter in the gas-liquid mixture to the liquid that allows to separate from the gas-liquid mixture through centrifugal impeller 700 flows out through-hole 821.

In the embodiment of the invention, the anti-blocking cover 800 which comprises the centrifugal impeller 700 and is covered on the centrifugal impeller 700 is arranged, so that gas-liquid separation can be realized in the pressure release process through the rotation of the centrifugal impeller 700, the pressure release device 10 can continuously exhaust to release pressure, the uncovering time of the pressure cooker is effectively shortened, the safety is higher, particles in the gas-liquid mixture can be blocked through the anti-blocking cover 800, a bubble breaking effect can be realized, bubbles can be broken at a position far away from an air outlet of the pressure release device, the pot overflow phenomenon is reduced, part of liquid can not reach the air outlet, and the gas-liquid separation is facilitated.

The structure of the centrifugal impeller 700 is referred to the centrifugal impeller 100 in the above embodiment of the pressure relief device 10, and will not be described herein again.

Referring to fig. 28 and 29 together, in the present embodiment, the through hole 821 is a strip-shaped hole whose length direction is arranged parallel to the axis.

In the present embodiment, the number of the strip-shaped holes is plural, and the strip-shaped holes are arranged at intervals in the circumferential direction of the annular side plate 820.

In the present embodiment, the width of the strip-shaped hole along the circumferential direction of the annular side plate 820 is 0.8mm to 3mm, for example, 0.8mm, 2mm, or 3 mm.

In this embodiment, the first base plate 810 is tapered such that liquid on the first base plate 810 collects toward the outer edge of the first base plate 810.

In the present embodiment, the included angle between the generatrix direction of the first base plate 810 and the reference plane perpendicular to the axis is 3 ° to 45 °, for example, 3 °, 20 °, or 45 °.

In this embodiment, the centrifugal impeller 700 includes a second bottom plate 710 and blades 720, and the blades 720 are disposed on one main surface of the second bottom plate 710 for generating centrifugal force during rotation of the centrifugal impeller 700 to separate gas and liquid of the gas-liquid mixture.

In the present embodiment, the outer edge of the vane 720 is spaced from the inner wall of the annular side plate 820 by 5mm to 50mm, for example, 5mm, 20mm, or 50mm, in the radial direction of the axis.

Referring to fig. 30 and fig. 1, 9, 21 or 25, the pressure cooker of the present invention includes a cooker body 30, a cooker lid 20 and a pressure release device 10, wherein the cooker lid 20 is covered on the cooker body 30, and the pressure release device 10 is disposed on a side of the cooker lid 20 close to the cooker body 30.

The specific structure of the pressure release device 10 is described in the above embodiments of the pressure release device, and is not described herein again.

According to the pressure release device 10, the centrifugal impeller and the upper cover are matched in structure, so that gas-liquid separation is realized during the process of pressure release by rotating the centrifugal impeller and the upper cover, the pressure release device can continuously exhaust gas to release pressure, the cover opening time of the pressure cooker is effectively shortened, and the safety is high.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (10)

1. A pressure relief device, comprising:

the centrifugal impeller can rotate around a preset axis;

the cover is covered on the periphery of the centrifugal impeller and used for forming an isolation cavity, a flow guide part corresponding to the centrifugal impeller is arranged on the cover, one end of the flow guide part is communicated with the isolation cavity, the other end of the flow guide part is communicated with the outside of the cover, and a gas-liquid mixture flows into the isolation cavity and acts on the centrifugal impeller through the flow guide part under the action of the internal-external pressure difference of the cover, so that the centrifugal impeller is driven to rotate to realize gas-liquid separation of the gas-liquid mixture.

2. The pressure relief device of claim 1, wherein the centrifugal impeller comprises:

a base plate;

first blades provided on one main surface of the base plate for generating a centrifugal force during rotation of the centrifugal impeller to separate gas and liquid of the gas-liquid mixture;

and the second blades protrude out of the periphery of the bottom plate along the radial direction of the axis, and the gas-liquid mixture acts on the second blades so as to enable the centrifugal impeller to rotate.

3. The pressure relief device of claim 2, wherein the number of second vanes is less than the number of first vanes, and wherein the second vanes are attached to a portion of the first vanes.

4. The pressure relief device of claim 3, wherein each of the second vanes is connected to at least two of the first vanes, respectively, that are adjacently disposed in a circumferential direction of the axis.

5. The pressure relief device according to claim 2, further comprising an upper cover, wherein the upper cover is disposed on a side of the first vane away from the bottom plate, the housing is connected to the upper cover so that the centrifugal impeller is accommodated in the isolation cavity, the centrifugal impeller further comprises a first guide ring disposed on a side of the first vane away from the bottom plate, and the upper cover comprises a second guide ring radially disposed on an inner side of the first guide ring along the axis, so that the gas-liquid mixture flows to the first vane through a space between the first guide ring and the second guide ring, thereby achieving gas-liquid separation by a centrifugal force generated by the rotating first vane.

6. The pressure relief device according to claim 5, wherein the upper cover further comprises a main body plate and a gas outlet provided on the main body plate, the second deflector ring is provided on a main surface of a side of the main body plate facing the centrifugal impeller, the gas after gas-liquid separation of the gas-liquid mixture is discharged from the gas outlet, and the liquid after gas-liquid separation is discharged in a circumferential direction of the centrifugal impeller.

7. The pressure relief device of claim 6, wherein the upper cover further comprises a third flow guide ring disposed on the main surface of the main body plate, the third flow guide ring is located outside the first flow guide ring along the radial direction of the axis, and the third flow guide ring and the first flow guide ring overlap in projection on the axis, such that the gas-liquid mixture flows to the first vane and the second vane through the third flow guide ring and the second flow guide ring and then through the first flow guide ring and the second flow guide ring.

8. The pressure relief device of claim 7, wherein the distance between the second deflector ring and the third deflector ring is 1mm to 5mm, and the distance between the first deflector ring and the body plate is 1mm to 5 mm.

9. Pressure relief device according to claim 1, characterized in that the bottom of the casing is conically arranged so that the liquid on the bottom of the casing is gathered towards the outer edge of the bottom of the casing, the casing being further provided with a one-way valve for opening when the amount of liquid in the casing reaches a threshold value so that the liquid flows out.

10. A pressure cooker, comprising a cooker body, a cooker cover and the pressure release device of any one of claims 1 to 9, wherein the cooker cover is covered on the cooker body, and the pressure release device is arranged on one side of the cooker cover close to the cooker body.

Images