WO2021129343A1

WO2021129343A1 - Pressure cooker and pressure release device thereof

Info

Publication number: WO2021129343A1
Application number: PCT/CN2020/133687
Authority: WO
Inventors: 蒲祖林; 谭发刚; 郑防震; 叶其勇
Original assignee: 广东美的白色家电技术创新中心有限公司; 广东美的生活电器制造有限公司; 美的集团股份有限公司
Priority date: 2019-12-24
Filing date: 2020-12-03
Publication date: 2021-07-01
Also published as: CN113017407A

Abstract

A pressure cooker and a pressure release device (10) thereof. The pressure release device (10) comprises a housing (100), a cover body (200) covering the housing (100), and an exhaust nozzle (300) connected to the housing (100); the housing (100) is used for matching the cover body (200) to form a first accommodating cavity (110) and a second accommodating cavity (120); the exhaust nozzle (300) is provided with a first airflow channel (310), and the first airflow channel (310) is communicated with a cooking cavity and the first accommodating cavity (110) of the pressure cooker, so that pressure gas in the cooking cavity can flow into the first accommodating cavity (110) in a pressure reduction mode; the first accommodating cavity (110) and the second accommodating cavity (120) are communicated by means of a second airflow channel, the second airflow channel enables pressure gas in the first accommodating cavity (110) to flow into the second accommodating cavity (120) in a pressure reduction mode, the pressure gas rotationally flows in the second accommodating cavity (120), and then gas-liquid separation is implemented under the action of centrifugal force. Steam in the pressure cooker can be efficiently restrained from being generated by means of two times of pressure reduction, the pressure cooker can continuously exhaust air to release pressure, the cover opening time of the pressure cooker is effectively shortened, and safety is high.

Description

Pressure cooker and pressure release device thereof

This application claims the right of preference for the Chinese patent application filed on December 24, 2019 with the application number 2019113504038 and the invention title "A pressure cooker and its pressure release device", which is fully incorporated into this application by reference.

【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 technique】

The pressure cooker uses the principle that the liquid has a higher boiling point at a higher pressure to apply pressure to the water contained in the pressure cooker so that the water can reach a higher temperature without boiling, which can speed up the cooking of ingredients and save cooking time. After the 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 outside atmospheric pressure to avoid the risk of scalding that may be caused by food spills.

The inventor of the present application has discovered in the long-term research and development that in the process of releasing the pressure of the pressure release device of the pressure cooker, because the pressure in the pressure cooker is rapidly reduced, the temperature of the liquid in the pressure cooker will be higher than its boiling point temperature, and part of the liquid will vaporize. When the liquid has a certain viscosity, the vaporized gas will expand from the inside of the liquid, and bubbles will be generated. The liquid or solid particles on the bubbles will be ejected with the gas, which will affect the safety and cleanliness of the pressure cooker. At present, the method of reducing the pressure in the pressure cooker is mainly through intermittent exhaust or cooling the temperature in the pressure cooker, and it takes a long time to open the lid.

[Summary of the invention]

The invention provides a pressure cooker and a pressure release device thereof, to solve the problem that the liquid is easy to vaporize to produce bubbles in the pressure cooker in the prior art, and the liquid and/or solids on the bubbles are easily ejected with the gas, causing hidden safety hazards and cleanliness Inconvenient technical issues.

In order to solve the above technical problems, a technical solution adopted by the present invention is to provide a pressure release device for a pressure cooker, including:

case;

A cover, which is arranged on the housing and is used to cooperate with the housing to form a first accommodating cavity and a second accommodating cavity;

The exhaust nozzle is connected to the housing and is provided with a first air flow channel which communicates with the cooking cavity of the pressure cooker and the first accommodating cavity, so that the pressure in the cooking cavity The gas flows into the first accommodating cavity in a depressurized manner;

Wherein, the first accommodating cavity and the second accommodating cavity are in communication through a second airflow channel, and the second airflow channel enables the pressure gas in the first accommodating cavity to flow into the The second accommodating cavity rotates and flows in the second accommodating cavity, thereby achieving gas-liquid separation under the action of centrifugal force, and then exhausting through the third air flow channel on the cover.

In a specific embodiment, a switch assembly is further provided on the cover, and the switch assembly extends into the first accommodating cavity and is used to selectively open and close the first air flow channel.

In a specific embodiment, the switch assembly includes a blocking member, an elastic member, and a lifting rod, and the elastic member elastically presses the blocking member against the first air flow channel and the first accommodating cavity The connecting outlet end further closes the first air flow channel, and the lifting rod is connected to the blocking member and extends to the outside of the cover, so that the user can use the lifting rod to remove the blocking member It is separated from the outlet end of the first air flow channel, and then the first air flow channel is opened.

In a specific embodiment, the cover body is provided with a first mounting hole, the side wall of the first mounting hole is provided with an annular bearing platform, and the blocking member includes a flexible cylinder and is connected to the flexible cylinder. Ring flanges and plugging heads at both ends of the cylinder, the switch assembly further includes a pressing ring, the pressing ring presses and fixes the ring flange to an annular bearing platform away from the first accommodating cavity Side, the lifting rod extends into the flexible cylinder through the pressure ring and is connected with the plugging head. The elastic member is arranged in the flexible cylinder and is elastically supported by the pressure ring and the plugging head. Between the plugging heads, the plugging head is then elastically pressed against the outlet end of the first air flow channel.

In a specific embodiment, the switch assembly further includes a lever sealing ring and a locking ring, the lever sealing ring is sleeved on the periphery of the lever, and is pressed and held by the locking ring. The inner wall of the pressure ring or the inner wall of the first mounting hole abuts to seal the flexible cylinder.

In a specific embodiment, the housing is provided with a second mounting hole, and one end of the exhaust nozzle is sleeved with a flexible sleeve, and is inserted and fixed in the second mounting hole.

In a specific embodiment, the second air flow channel is arranged tangentially to the side wall of the second accommodating cavity.

In a specific embodiment, a groove connecting the first accommodating cavity and the second accommodating cavity is provided on the side of the housing facing the cover, and the pressure release device further includes a cover. The sealing element above the groove or embedded in the groove forms the second air flow channel.

In a specific embodiment, the width of the second air flow channel is 0.8 mm to 3 mm, the diameter of the second accommodating cavity is 60 mm to 120 mm, and the height of the second accommodating cavity is 20 mm to 60 mm. The width of the third air flow channel is 2.5 mm to 6 mm.

In order to solve the above technical problems, another technical solution adopted by the present invention is to provide a pressure cooker, including a pot body, a pot cover and the above-mentioned pressure release device. The pot cover is arranged on the pot body, and the pressure release The device is arranged on the pot cover.

In the present invention, a shell and a cover are arranged in the pressure release device to form a first accommodating cavity and a second accommodating cavity, and an exhaust nozzle connected to the shell is arranged so that the pressure gas in the cooking cavity of the pressure cooker is discharged in a depressurized manner The gas nozzle flows into the first accommodating cavity, and makes the pressure gas in the first accommodating cavity flow into the second accommodating cavity in a depressurized manner. The two depressurization can effectively suppress the generation of steam in the pressure cooker, and the pressurized gas is in the second accommodating cavity. The two accommodating cavities rotate and flow, and the gas-liquid separation is realized under the action of centrifugal force, so that the pressure cooker can be continuously exhausted to release the pressure, which effectively shortens the opening time of the pressure cooker, and has high safety.

【Explanation of the drawings】

In order to explain the technical solutions in the embodiments of the present invention more clearly, the following will briefly introduce the drawings needed in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative work, other drawings can be obtained based on these drawings, among which:

Figure 1 is a three-dimensional structural diagram of an embodiment of a pressure release device for a pressure cooker according to the present invention;

Figure 2 is a schematic side view of an embodiment of the pressure release device of the pressure cooker of the present invention;

Figure 3 is a schematic cross-sectional view of the pressure release device in Figure 2 along the A-A direction;

Figure 4 is a schematic cross-sectional view of the pressure release device in Figure 2 along the B-B direction;

Figure 5 is a schematic diagram of the explosive structure of an embodiment of the pressure release device of the pressure cooker of the present invention;

Fig. 6 is a three-dimensional structural diagram of the shell in the embodiment of the pressure release device of the pressure cooker of the present invention;

Fig. 7 is a three-dimensional structural diagram of the cover in an embodiment of the pressure release device of the pressure cooker of the present invention;

Fig. 8 is a schematic cross-sectional view of the blocking member in an embodiment of the pressure release device of the pressure cooker of the present invention;

9 is a cross-sectional structural diagram of the switch assembly in the open state of the pressure release device embodiment of the pressure cooker of the present invention;

Fig. 10 is a schematic diagram of the three-dimensional structure of the pressure cooker of the present invention.

【Detailed ways】

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

The terms "first" and "second" in this application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. In the description of this application, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined. In addition, the terms "including" and "having" and any variations of them are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes unlisted steps or units, or optionally also includes Other steps or units inherent to these processes, methods, products or equipment. The term "and/or" is only an association relationship that describes the associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone. These three situations. In addition, the character "/" in this text generally indicates that the associated objects before and after are in an "or" relationship.

1 to 4, an embodiment of the pressure release device 10 of the pressure cooker of the present invention includes a housing 100, a cover 200, and an exhaust nozzle 300. The cover 200 is covered on the housing 100 and is used to form a body in cooperation with the housing 100 The first accommodating cavity 110 and the second accommodating cavity 120; the exhaust nozzle 300 is connected to the housing 100 and is provided with a first air flow channel 310, which communicates with the cooking cavity of the pressure cooker and the first accommodating cavity 110 , So that the pressure gas in the cooking cavity flows into the first accommodating cavity 110 in a depressurized manner; wherein, the first accommodating cavity 110 and the second accommodating cavity 120 are in communication through a second air flow channel (not shown in the figure) , The second air flow channel makes the pressurized gas in the first accommodating cavity 110 flow into the second accommodating cavity 120 in a depressurized manner, and rotate and flow in the second accommodating cavity 120, and then realize gas-liquid separation under the action of centrifugal force, and then It is discharged through the third air flow channel 210 on the cover 200.

In the embodiment of the present invention, the pressure release device 10 is provided with a housing 100 and a cover 200 to form a first housing cavity 110 and a second housing cavity 120, and an exhaust nozzle 300 connected to the housing 100 is provided to make the cooking cavity of the pressure cooker The pressure gas inside flows into the first accommodating cavity 110 through the exhaust nozzle 300 in a depressurization manner, and the pressure gas in the first accommodating cavity 110 flows into the second accommodating cavity 120 in a depressurization manner, and the pressure can be effectively reduced by two times. The generation of steam in the pressure cooker is suppressed, and the pressure gas rotates and flows in the second accommodating cavity 120, thereby achieving gas-liquid separation under the action of centrifugal force, so that the pressure cooker can be continuously exhausted to release the pressure, effectively shortening the opening time of the pressure cooker, And the safety is high.

In this embodiment, the second accommodating cavity 120 is substantially cylindrical, and the second air flow channel is arranged tangentially to the side wall of the second accommodating cavity 120, so that the second air flow channel is left to the second accommodating cavity 120 The airflow flows into the second accommodating cavity 120 in a direction tangent to the side wall of the second accommodating cavity 120, so as to rotate and flow in the second accommodating cavity 120, thereby generating centrifugal force to separate the airflow from gas and liquid.

In this embodiment, the diameter of the second accommodating cavity 120 is 60 mm to 120 mm, for example, 60 mm, 100 mm, or 120 mm. The height of the second accommodating cavity 120 is 20 mm to 60 mm, for example, 20 mm, 40 mm, or 60 mm. The second accommodating cavity 120 can maintain gas pressure while achieving gas-liquid separation, so that the pressure of the gas can be greater than the outside atmospheric pressure, so that the gas can be smoothly discharged from the pressure cooker.

In this embodiment, the side of the housing 100 facing the cover 200 is provided with a groove 130 that communicates with the first accommodating cavity 110 and the second accommodating cavity 120, and the pressure release device further includes a cover arranged above the groove 130 or The sealing member 140 embedded in the groove 130 further forms a second air flow channel. In other embodiments, the second air flow channel may also be formed on the sealing member 140, which is not limited here. By making the groove 130 in a semi-opened state, it can be easily cleaned.

In this embodiment, the cross section of the second air flow channel is circular, and the diameter of the second air flow channel is 0.8 mm to 3 mm, such as 0.8 mm, 2 mm, or 3 mm. By arranging the second air flow channel as a fine hole, the gas passing through the second air flow channel can have a damping effect, so that the flow rate of the gas is slowed down, and the flow rate is reduced, so that the air flow becomes smooth from the rapid flow state, and then Play a role in reducing the pressure, which is beneficial to suppress the vaporization of the liquid in the pressure cooker.

In other embodiments, the cross section of the second air flow channel may also be rectangular, D-shaped, semi-circular, etc., with a width of 0.8 mm to 3 mm, which is not limited here.

In this embodiment, the cross section of the third air flow channel 210 is circular, and the diameter of the third air flow channel 210 is 2.5 mm to 6 mm, for example, 2.5 mm, 3.5 mm, or 6 mm. By limiting the width of the third air flow channel 210, the cavity size of the second accommodating cavity 120 can be matched to keep the gas pressure in the second accommodating cavity 120 greater than the outside atmospheric pressure, and the effect of reducing noise can be achieved.

In other embodiments, the cross section of the third air flow channel 210 may also be a rectangular or other special-shaped hole, and the width thereof is 0.8 mm to 3 mm, which is not limited herein.

5 to 7 together, in this embodiment, the cover 200 is further provided with a switch assembly 400, the switch assembly 400 extends into the first accommodating cavity 110, and is used to selectively open and close the first airflow Channel 310. By closing the first air flow channel 310, it can cooperate to play a role in pressurizing the cooking cavity of the pressure cooker, and by opening the first air flow channel 310, the pressure of the pressure gas in the cooking cavity of the pressure cooker can be relieved.

In this embodiment, the switch assembly 400 includes a blocking member 410, an elastic member 420, and a lifting rod 430. The elastic member 420 elastically presses the blocking member 410 against the outlet connecting the first air flow channel 310 and the first accommodating cavity 110. The first air channel 310 is closed, and the lifting rod 430 is connected to the blocking member 410 and extends to the outside of the cover 200 for the user to connect the blocking member 410 to the outlet end of the first air channel 310 through the lifting rod 430 Separate, and then open the first air flow channel 310.

In this embodiment, the cover 200 is provided with a first mounting hole 220, and the side wall of the first mounting hole 220 is provided with an annular bearing platform 221. Referring to FIG. 8 together, the blocking member 410 includes a flexible cylinder 411 and Connected to the annular flange 412 and the plugging head 413 at both ends of the flexible cylinder 411, the switch assembly 400 further includes a pressing ring 440 which presses and fixes the annular flange 412 on the annular platform 221 away from the first accommodating cavity 110 On one side, the lifting rod 430 extends into the flexible cylinder 411 through the pressure ring 440 and is connected with the plugging head 413. The elastic member 420 is arranged in the flexible cylinder 411 and is elastically supported by the pressure ring 440 and the plugging head 413. In between, the plugging head 413 is elastically pressed against the outlet end of the first air flow channel 310.

In this embodiment, the switch assembly 400 further includes a lever sealing ring 450 and a locking ring 460. The lever sealing ring 450 is sleeved on the periphery of the lever 430 and is attached to the first installation under the pressing action of the locking ring 460. The inner wall of the hole 220 abuts to seal the flexible cylinder 411. Wherein, the lifting rod sealing ring 450 is clamped between the first lifting rod sealing ring 450 and the locking ring 460. In other embodiments, the lifting rod sealing ring 450 may also abut the inner wall of the pressing ring 440 under the pressing action of the locking ring 460, which is not limited here.

By arranging the elastic member 420 in the enclosed space formed by the flexible cylinder 411 and the lifting rod sealing ring 450, the elastic member 420 can be prevented from being contaminated when the exhaust pressure relief and pressure release device is cleaned, and the service life of the elastic member 420 can be effectively prolonged .

In this embodiment, the housing 100 is provided with a second mounting hole 150, and one end of the exhaust nozzle 300 is sleeved with a flexible sleeve 320, and is inserted and fixed in the second mounting hole 150. By providing the flexible sleeve 320, the sealing performance between the exhaust nozzle 300 and the blocking member 410 can be further enhanced.

In this embodiment, a handle 470 may be provided at the end of the lifting rod 430 far away from the blocking member 410, which is convenient for the user to hold.

9 together, specifically, when the food in the pressure cooker needs to be exhausted after cooking, the handle 470 is lifted by the user, the blocking member 410 is separated from the outlet end of the first air flow channel 310, and the pressure gas in the pressure cooker is removed from the cooking cavity An air flow is formed through the first air flow channel 310 and enters the first accommodating cavity 110. The pressure of the air flow is reduced for the first time due to the damping effect; then the air flow enters the second accommodating cavity 120 through the second air flow channel, and the pressure of the air flow is the first due to the damping effect. The airflow direction is tangent to the side wall of the second accommodating cavity 120. The airflow rotates in the second accommodating cavity 120. The centrifugal force produces a gas-liquid separation phenomenon, causing the liquid to flow in the second accommodating cavity. In 120, the gas is discharged through the third gas flow channel 210.

In this embodiment, the force received by the blocking member 410 is F=p×S, where p is the pressure of the air pressure in the cooking cavity, and S is the outlet area of the exhaust nozzle 300. When the pressure control system in the pressure cooker fails, the pressure in the cooking cavity of the pressure cooker will be greater than its rated working pressure. When the force on the sealing member 410 is greater than the pretension force of the elastic member 420, the spring shrinks, and the sealing member 410 and The outlet end of the first air flow channel 310 is separated, and the pressure gas in the cooking cavity is discharged through the pressure release device, thereby realizing the overpressure relief protection function. Among them, the pressure relief process is similar to the normal exhaust process described above, and will not be repeated here.

Referring to FIG. 10, the pressure cooker embodiment of the present invention includes a pot body 20, a pot lid 30 and a pressure release device 10. The pot lid 30 is covered on the pot body 20, and the pressure release device 10 is installed on the pot lid 30.

For the specific structure of the pressure release device 10, refer to the above-mentioned embodiment of the pressure release device 10, which will not be repeated here.

The above are only the embodiments of the present invention, and do not limit the scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied to other related technologies In the same way, all fields are included in the scope of patent protection of the present invention.

Claims

A pressure release device for a pressure cooker, which is characterized in that it comprises:

case;

A cover, which is arranged on the housing and is used to cooperate with the housing to form a first accommodating cavity and a second accommodating cavity;

The exhaust nozzle is connected to the housing and is provided with a first air flow channel which communicates with the cooking cavity of the pressure cooker and the first accommodating cavity, so that the pressure in the cooking cavity The gas flows into the first accommodating cavity in a depressurized manner;

Wherein, the first accommodating cavity and the second accommodating cavity are in communication through a second airflow channel, and the second airflow channel enables the pressure gas in the first accommodating cavity to flow into the The second accommodating cavity rotates and flows in the second accommodating cavity, thereby achieving gas-liquid separation under the action of centrifugal force, and then exhausting through the third air flow channel on the cover.
The pressure release device according to claim 1, wherein the cover is further provided with a switch assembly, the switch assembly extends into the first accommodating cavity, and is used to selectively open and close the The first air flow channel.
The pressure release device according to claim 2, wherein the switch assembly includes a blocking member, an elastic member, and a lifting rod, and the elastic member elastically presses the blocking member against the first air flow channel The outlet end connected to the first accommodating cavity further closes the first air flow channel, and the lifting rod is connected to the blocking member and extends to the outside of the cover for the user to pass through the The lifting rod separates the blocking member from the outlet end of the first air flow channel, thereby opening the first air flow channel.
The pressure release device according to claim 3, wherein the cover body is provided with a first mounting hole, a side wall of the first mounting hole is provided with an annular bearing platform, and the blocking member includes a flexible A cylinder and an annular flange and a plugging head connected to both ends of the flexible cylinder. The switch assembly further includes a pressure ring, which presses and fixes the annular flange on the annular bearing platform away from the base. On one side of the first accommodating cavity, the lifting rod extends into the flexible cylinder through the pressure ring and is connected with the plugging head, and the elastic member is arranged in the flexible cylinder and is elastic Supported between the pressure ring and the plugging head, and then elastically pressing the plugging head against the outlet end of the first air flow channel.
The pressure release device according to claim 4, wherein the switch assembly further comprises a lever sealing ring and a locking ring, and the lever sealing ring is sleeved on the periphery of the lever and is locked in the locking ring. The ring abuts against the inner wall of the pressure ring or the inner wall of the first mounting hole under the pressing action of the ring, thereby sealing the flexible cylinder.
The pressure release device according to claim 3, wherein the pressure release device further comprises a handle, and the handle is arranged at an end of the lifting rod away from the blocking member.
The pressure release device according to claim 1, wherein the housing is provided with a second mounting hole, one end of the exhaust nozzle is sheathed with a flexible sleeve, and is inserted and fixed to the second mounting hole.孔内。 In the hole.
The pressure release device according to claim 1, wherein the second air flow channel is arranged tangentially to the side wall of the second accommodating cavity.
The pressure release device according to claim 8, characterized in that the side of the housing facing the cover is provided with a groove communicating the first accommodating cavity and the second accommodating cavity, so The pressure release device further includes a sealing element that is arranged above the groove or is embedded in the groove, thereby forming the second air flow channel.
The pressure release device according to claim 9, wherein the grooves are arranged in a semi-opened form.
The pressure release device according to claim 8, wherein the pressure release device further comprises a sealing element, the sealing element is covered on a side of the housing facing the cover, and the second air flow A channel is formed on the sealing member.
The pressure release device according to claim 1, wherein the cross section of the second air flow channel is circular, rectangular, D-shaped or semicircular, and the cross section of the third air flow channel is circular or rectangular.
The pressure release device according to claim 1, wherein the width of the second air flow channel is 0.8 mm to 3 mm, the diameter of the second accommodating cavity is 60 mm to 120 mm, and the second accommodating cavity The height of is 20mm to 60mm, and the width of the third air flow channel is 2.5mm to 6mm.
A pressure cooker, characterized by comprising a pot body, a pot cover, and the pressure release device according to any one of claims 1 to 13, wherein the pot cover is arranged on the pot body, and the pressure release device is arranged on Cover the pot.