Pressure relief mechanism of pressure cooker

Abstract

The pressure relief mechanism of the pressure cooker comprises a cooker cover, an emergency pressure relief channel is further arranged on the cooker cover, the emergency pressure relief channel is provided with an emergency pressure relief assembly capable of enabling the emergency pressure relief channel to be connected or disconnected, and the emergency pressure relief assembly comprises a pressure relief block and a limiting structure used for limiting the position of the pressure relief block. The pressure in the emergency pressure relief channel can push the pressure relief block to be separated from the limiting structure and enable the emergency pressure relief channel to be communicated, and the pressure relief block can enable the emergency pressure relief channel to be communicated by separating from the limiting structure, so that the pressure is released outwards, and the safety of the pressure cooker is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of pressure cooker accessories, and particularly relates to a pressure relief mechanism of a pressure cooker. BACKGROUND

[0002] A pressure cooker, also known as a pressure cooker, is a common cooking utensil in modern kitchens. It increases the boiling point of water by increasing the pressure in the pot, thereby cooking food at a higher temperature.

[0003] If the pressure in the pressure cooker continues to rise and exceeds the safety limit, it may cause damage to the pot body, and even cause serious safety accidents such as explosion. Therefore, when the pressure in the pot reaches a certain level, the pressure cooker needs to release the excess pressure through a pressure relief device (such as a pressure limiting valve, safety valve, etc.) to ensure safety in use.

[0004] However, when the pressure relief device fails, the pressure in the pressure cooker will not be released in time, resulting in a certain safety hazard of the pressure cooker.

[0005] Therefore, further improvement is needed. UTILITY MODEL CONTENTS

[0006] The utility model aims at overcoming the deficiencies of the prior art, and provides a pressure relief mechanism of a pressure cooker, which can release pressure outward in an emergency and improve the safety of the pressure cooker.

[0007] The utility model is implemented as follows:

[0008] A pressure relief mechanism of a pressure cooker, comprising a pot cover, the pot cover is further provided with an emergency pressure relief channel, the emergency pressure relief channel is provided with an emergency pressure relief assembly capable of conducting or blocking the emergency pressure relief channel, the emergency pressure relief assembly comprises a pressure relief block and a limiting structure for limiting the position of the pressure relief block, and the pressure in the emergency pressure relief channel can push the pressure relief block to separate from the limiting structure and make the emergency pressure relief channel conductive.

[0009] As a specific scheme, the pressure relief block is processed and formed by silica gel material.

[0010] As a specific scheme, the limiting structure comprises a limiting ring, a first supporting step is arranged below the position corresponding to the limiting ring on the emergency pressure relief channel, and a limiting groove for limiting the position of the pressure relief block is formed between the limiting ring and the first supporting step.

[0011] As a specific solution, the limiting structure further comprises an upper limiting piece and a lower limiting piece, the upper limiting piece passes through the pot cover from top to bottom, the lower limiting piece is provided with a connecting groove, the connecting groove is connected and fixed with the lower section of the upper limiting piece, the inner side of the upper limiting piece and the lower limiting piece is respectively provided with an upper through hole and a lower through hole, the upper through hole and the lower through hole are communicated with each other and form an emergency pressure relief channel, the inner side of the connecting groove is provided with a first bearing step and a second bearing step, the spacing between the first bearing step and the second bearing step and the center of the lower limiting piece increases from bottom to top, the relief block and the limiting ring are respectively in abutment with the first bearing step and the second bearing step, and the vertical projection of the limiting ring at least partially overlaps with the relief block.

[0012] As a specific solution, the outer side of the relief block is provided with an elastic flange, the lower side of the elastic flange is in abutment with the first bearing step, and the upper side of the elastic flange is provided with a guide slope, which is inclinedly arranged from outside to inside and upward.

[0013] As a specific solution, the lower side of the upper limiting piece is spaced apart from the limiting ring.

[0014] As a specific solution, the upper and lower sides of the relief block are respectively provided with an upper surrounding edge and a lower surrounding edge, the outer sides of the upper surrounding edge and the lower surrounding edge are respectively adjacent to the limiting ring and the first bearing step, the inner sides of the upper surrounding edge and the lower surrounding edge respectively form an upper recess hole and a lower recess hole, and the hole diameter of the upper recess hole is larger than that of the lower recess hole.

[0015] As a specific solution, the upper side of the upper limiting piece is provided with an outward turning edge, a sealing gasket is arranged between the outward turning edge and the outer side of the pot cover, and the sealing gasket is tightly connected with the outward turning edge and the pot cover respectively.

[0016] As a specific solution, the upper side opening end of the connecting groove is provided with a guide slope, which is inclinedly arranged from bottom to top and outward.

[0017] As a specific solution, the lower limiting piece is provided with a plurality of air inlet holes which are distributed in the circumferential direction, the air inlet holes are arranged in the radial direction, and the lower through hole can be communicated with the lower side space of the pot cover through the air inlet holes.

[0018] As a specific solution, the pot cover is provided with a main pressure relief channel, the main pressure relief channel is provided with a main pressure relief assembly capable of conducting or blocking the main pressure relief channel, the main pressure relief assembly comprises a pressure relief valve core and a pressure relief valve cover, the pressure relief valve core has a pressure relief channel passing through the upper and lower ends thereof, the lower end of the pressure relief channel is communicated with the lower side space of the pot cover, the pressure relief valve cover is sleeved on the outer side of the pressure relief valve core, the pressure relief valve cover is provided with a valve cover plug, the valve cover plug can conduct or block the main pressure relief channel, and the pressure threshold value of the main pressure relief assembly for conducting the main pressure relief channel is smaller than the pressure threshold value of the relief block for separating from the limiting structure.

[0019] As a specific scheme, the valve cover plug and the pressure relief valve cover are provided with an elastic reset structure, the pressure in the pressure relief channel can push away the valve cover plug and deform the elastic reset structure, and reset of the elastic reset structure can make the valve cover plug tightly fit with the upper end of the pressure relief channel.

[0020] The utility model discloses the beneficial effects are:

[0021] The pressure relief block can make the emergency pressure relief channel conductive by disengaging the limiting structure, thereby releasing pressure outwardly and improving the safety of the pressure cooker. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The cross-sectional view of the embodiment of the utility model Figure One .

[0023] Figure 2 The cross-sectional view of the embodiment of the utility model Figure Two .

[0024] Figure 3 The structure diagram of the embodiment of the utility model Figure One .

[0025] Figure 4 The structure diagram of the embodiment of the utility model Figure Two .

[0026] Figure 5 The enlarged view of the position A of the embodiment of the utility model.

[0027] Figure 6 The enlarged view of the position B of the embodiment of the utility model. DETAILED DESCRIPTION

[0028] The utility model will be further described below in combination with the drawings and embodiments.

[0029] Referring to Figures 1-6 , the pressure relief mechanism of the pressure cooker, including the pot cover 1, still being equipped with emergency pressure relief channel 12 on the pot cover 1, emergency pressure relief channel 12 is equipped with emergency pressure relief assembly that can make emergency pressure relief channel 12 conductive or block, emergency pressure relief assembly includes pressure relief block 2 and the limiting structure for limiting the position of pressure relief block 2, the pressure in emergency pressure relief channel 12 can push pressure relief block 2 and make emergency pressure relief channel 12 conductive by disengaging the limiting structure, pressure relief block 2 can make emergency pressure relief channel 12 conductive by disengaging the limiting structure, thereby releasing pressure outwardly and improving the safety of the pressure cooker.

[0030] Moreover, when the pressure relief block 2 disengages the limiting structure, the pressure relief block 2 will not be damaged, and the cost of subsequent maintenance can be reduced.

[0031] Further, the pressure relief block 2 is made of silica gel material, which can ensure the high temperature resistance of the pressure relief block 2.

[0032] Further, the limiting structure includes a limiting ring 8, and the first supporting step 411 is arranged below the position corresponding to the limiting ring 8 on the emergency pressure relief channel 12, and the limiting groove for limiting the position of the pressure relief block 2 is formed between the limiting ring 8 and the first supporting step 411.

[0033] Further, the limiting structure further includes an upper limiting piece 3 and a lower limiting piece 4, the upper limiting piece 3 passes through the pot cover 1 from top to bottom, the lower limiting piece 4 is provided with a connecting groove 41, the connecting groove 41 is connected and fixed with the lower segment of the upper limiting piece 3, the inner sides of the upper limiting piece 3 and the lower limiting piece 4 are respectively provided with an upper through hole 31 and a lower through hole 42, the upper through hole 31 and the lower through hole 42 are communicated with each other and form the emergency pressure relief channel 12, the inner side of the connecting groove 41 is provided with the first supporting step 411 and the second supporting step 412, the spacing between the first supporting step 411 and the second supporting step 412 and the center of the lower limiting piece 4 increases from bottom to top, the pressure relief block 2 and the limiting ring 8 respectively abut against the first supporting step 411 and the second supporting step 412, the vertical projection of the limiting ring 8 at least partially overlaps the pressure relief block 2, and the limiting ring 8 cooperates with the second supporting step 412 to limit the pressure relief block 2.

[0034] Further, the outer side of the pressure relief block 2 is provided with an elastic flange 21, the lower side of the elastic flange 21 abuts against the first supporting step 411, the upper side of the elastic flange 21 is provided with a guide inclined surface 211, the guide inclined surface 211 is arranged to be inclined from outside to inside and upward, when the pressure in the pressure cooker continues to rise to the pressure threshold value at which the pressure relief block 2 is separated from the limiting structure, the pressure relief block 2 is subjected to an upward thrust, the elastic flange 21 is deformed to cause the elastic flange 21 to slide through the limiting ring 8 to make the pressure relief block separate from the limiting of the limiting ring 8.

[0035] Further, the spacing is formed between the lower side of the upper limiting piece 3 and the limiting ring 8, when the pressure in the pressure cooker continues to rise to the pressure threshold value at which the pressure relief block 2 is separated from the limiting structure, the pressure relief block 2 will first push the limiting ring 8 to move upward to the lower side of the upper limiting piece 3, and the spacing between the lower side of the upper limiting piece 3 and the limiting ring 8 can make the pressure relief block 2 have a relatively high speed upward, so that it can be more easily released from the limitation of the limiting structure.

[0036] In addition, manufacturers can form different spacing between the lower side of the upper limiting piece 3 and the limiting ring 8, so as to change the speed when the limiting ring 8 contacts the upper limiting piece 3. For example, when the spacing between the lower side of the upper limiting piece 3 and the limiting ring 8 needs to be increased, the spacing between the lower side of the upper limiting piece 3 and the limiting ring 8 can be increased, and vice versa.

[0037] Furthermore, the pressure relief block 2 is provided with an upper rim 22 and a lower rim 23 on its upper and lower sides, respectively. The outer sides of the upper rim 22 and the lower rim 23 are adjacent to and cooperate with the limiting ring 8 and the first supporting step 411, respectively. The inner sides of the upper rim 22 and the lower rim 23 form an upper concave hole 221 and a lower concave hole 231, respectively. The diameter of the upper concave hole 221 is larger than the diameter of the lower concave hole 231. The upper rim 22 and the lower rim 23 can cooperate with the limiting ring 8 and the first supporting step 411 to improve the installation accuracy of the pressure relief block 2. At the same time, the lower concave hole 231 can play a certain energy-concentrating effect, so that the air pressure can be more concentrated on the pressure relief block 2. Moreover, the different diameters of the upper concave hole 221 and the lower concave hole 231 can play a foolproof role and avoid assembly errors.

[0038] Furthermore, the upper side of the upper limit positioner 3 is provided with an outward flange 32, which can achieve the effect of proper installation and improve the installation accuracy between the upper limit positioner 3 and the pot lid 1.

[0039] A sealing gasket 5 is provided between the outer flange 32 and the outer side of the pot lid 1. The sealing gasket 5 is tightly connected to the outer flange 32 and the pot lid 1 respectively. The sealing gasket 5 can play a buffering role to prevent the outer flange 32 from directly contacting the pot lid 1. At the same time, it can also improve the sealing between the upper limit part 3 and the pot lid 1 and prevent air leakage at the connection between the two.

[0040] Furthermore, the upper opening end of the connecting groove 41 is provided with an inlet slope 413, which is inclined from bottom to top outward to improve the smoothness of the installation and connection process between the upper limit member 3 and the lower limit member 4.

[0041] Furthermore, the lower limit member 4 is provided with a number of circumferentially distributed air inlets 43, which are arranged radially. The lower through hole 42 can communicate with the lower space of the pot lid 1 through the air inlets 43, thereby increasing the efficiency of gas entering the lower through hole 42. As a result, when the pressure exceeds the pressure threshold for the pressure relief block 2 to detach from the limit structure, the pressure relief block 2 can detach from the limit structure more quickly.

[0042] Furthermore, the pot lid 1 is provided with a main pressure relief channel 11, and the main pressure relief channel 11 is provided with a main pressure relief component that can open or close the main pressure relief channel 11. The main pressure relief component includes a pressure relief valve core 6 and a pressure relief valve cover 7. The pressure relief valve core 6 has a pressure relief groove 61 that runs through its upper and lower ends. The lower end of the pressure relief groove 61 is connected to the lower space of the pot lid 1. The pressure relief valve cover 7 is sleeved on the outside of the pressure relief valve core 6. The pressure relief valve cover 7 is provided with a valve cover plug 71. The valve cover plug 71 can open or close the main pressure relief channel 11. The pressure threshold for the main pressure relief component to open the main pressure relief channel 11 is less than the pressure threshold for the pressure relief block 2 to disengage from the limiting structure.

[0043] The main pressure relief component makes the pressure threshold for the main pressure relief channel 11 to be open less than the pressure threshold for the pressure relief block 2 to detach from the limiting structure. When the main pressure relief component is working normally, the pressure inside the pressure cooker can be released to the outside through the main pressure relief channel 11. Since the pressure threshold for the main pressure relief component to make the main pressure relief channel 11 open is relatively small, the pressure can be released to the outside through the main pressure relief channel 11 before the pressure relief block 2 detaches from the limiting structure, thus preventing the pressure inside the pressure cooker from continuing to rise to the pressure threshold for the pressure relief block 2 to detach from the limiting structure. Therefore, the pressure relief block 2 will not detach from the limiting structure when the main pressure relief channel 11 is working normally.

[0044] When the main pressure relief component fails, causing the main pressure relief channel 11 to be unable to be normally opened when the pressure reaches the threshold, the internal pressure of the pressure cooker will continue to increase until the pressure reaches the pressure threshold at which the pressure relief block 2 disengages from the limiting structure. At this point, the pressure relief block 2 disengages from the limiting structure, allowing airflow to be discharged outward from the emergency pressure relief channel 12, thereby achieving the effect of emergency pressure relief.

[0045] Furthermore, an elastic reset structure is provided between the valve cover plug 71 and the pressure relief valve cover 7. The pressure in the pressure relief channel 61 can push the valve cover plug 71 open and deform the elastic reset structure. The reset structure can make the valve cover plug 71 and the upper end of the pressure relief channel 61 fit tightly. When the pressure of the pressure cooker reaches the pressure threshold that makes the main pressure relief channel 11 open, the valve cover plug 71 is pushed open under the action of pressure, thereby making the pressure relief channel 61 open outward, achieving the pressure relief effect.

[0046] As an equivalent transformation, the main pressure relief assembly can also adopt the conventional structure of a pressure relief valve similar to that of an existing pressure cooker, which will be understood by those skilled in the art.

[0047] The above embodiments are merely preferred embodiments of this utility model, and other implementations are also possible. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model, and all such equivalent modifications or substitutions are included within the scope set forth in the claims of this application.

Claims

1. A pressure relief mechanism for a pressure cooker, comprising a lid (1), characterized in that, The pot lid (1) is also provided with an emergency pressure relief channel (12). The emergency pressure relief channel (12) is provided with an emergency pressure relief component that can make the emergency pressure relief channel (12) open or closed. The emergency pressure relief component includes a pressure relief block (2) and a limiting structure for limiting the position of the pressure relief block (2). The pressure in the emergency pressure relief channel (12) can push the pressure relief block (2) away from the limiting structure and make the emergency pressure relief channel (12) open.

2. The pressure relief mechanism of the pressure cooker according to claim 1, characterized in that: The pressure relief block (2) is formed by processing silicone material.

3. The pressure relief mechanism of the pressure cooker according to claim 1, characterized in that: The limiting structure includes a limiting ring (8), and the emergency pressure relief channel (12) is provided with a first supporting step (411) located below the limiting ring (8). A limiting groove is formed between the limiting ring (8) and the first supporting step (411) to limit the position of the pressure relief block (2).

4. The pressure relief mechanism of the pressure cooker according to claim 3, characterized in that: The limiting structure also includes an upper limiting member (3) and a lower limiting member (4). The upper limiting member (3) passes through the pot lid (1) from top to bottom. The lower limiting member (4) is provided with a connecting groove (41). The connecting groove (41) is connected and fixed to the lower section of the upper limiting member (3). The inner sides of the upper limiting member (3) and the lower limiting member (4) are respectively provided with an upper through hole (31) and a lower through hole (42). The upper through hole (31) and the lower through hole (42) are interconnected and form an emergency pressure relief passage. The inner side of the channel (12) and the connecting groove (41) has a first supporting step (411) and a second supporting step (412). The distance between the first supporting step (411) and the second supporting step (412) and the center of the lower limiting member (4) increases from bottom to top. The pressure relief block (2) and the limiting ring (8) abut against the first supporting step (411) and the second supporting step (412) respectively. The vertical projection of the limiting ring (8) overlaps at least partially with the pressure relief block (2).

5. The pressure relief mechanism of the pressure cooker according to claim 4, characterized in that: The pressure relief block (2) has an elastic protrusion (21) on its outer side. The lower side of the elastic protrusion (21) abuts against the first supporting step (411). The upper side of the elastic protrusion (21) has a guide slope (211) which is inclined from the outside to the inside and upward.

6. The pressure relief mechanism of the pressure cooker according to claim 4, characterized in that: A gap is formed between the lower side of the upper limit member (3) and the limiting ring (8).

7. The pressure relief mechanism of the pressure cooker according to claim 3, characterized in that: The pressure relief block (2) has an upper rim (22) and a lower rim (23) on its upper and lower sides respectively. The outer sides of the upper rim (22) and the lower rim (23) are adjacent to and cooperate with the limiting ring (8) and the first supporting step (411) respectively. The inner sides of the upper rim (22) and the lower rim (23) respectively form an upper concave hole (221) and a lower concave hole (231). The diameter of the upper concave hole (221) is larger than the diameter of the lower concave hole (231).

8. The pressure relief mechanism of the pressure cooker according to claim 4, characterized in that: The upper side of the upper limit member (3) is provided with an outward flange (32), and a sealing gasket (5) is provided between the outward flange (32) and the outer side of the pot lid (1). The sealing gasket (5) is tightly connected to the outward flange (32) and the pot lid (1) respectively.

9. The pressure relief mechanism of the pressure cooker according to claim 4, characterized in that: The upper opening end of the connecting groove (41) is provided with an inlet inclined surface (413), which is inclined from bottom to top outward. The lower limit member (4) is provided with a plurality of air inlets (43) distributed circumferentially. The air inlets (43) are arranged radially, and the lower through hole (42) can communicate with the lower space of the pot lid (1) through the air inlets (43).

10. The pressure relief mechanism of the pressure cooker according to any one of claims 1-9, characterized in that: The pot lid (1) is provided with a main pressure relief channel (11), and the main pressure relief channel (11) is provided with a main pressure relief assembly that can open or close the main pressure relief channel (11). The main pressure relief assembly includes a pressure relief valve core (6) and a pressure relief valve cover (7). The pressure relief valve core (6) has a pressure relief groove (61) that runs through its upper and lower ends. The lower end of the pressure relief groove (61) is connected to the lower space of the pot lid (1). The pressure relief valve cover (7) is sleeved on the outside of the pressure relief valve core (6). The pressure relief valve cover (7) is provided with a valve cover plug (71). The valve cover plug (71) can open or close the main pressure relief channel (11). The pressure threshold for the main pressure relief assembly to open the main pressure relief channel (11) is less than the pressure threshold for the pressure relief block (2) to disengage from the limiting structure. An elastic reset structure is provided between the valve cover plug (71) and the pressure relief valve cover (7). The pressure in the pressure relief groove (61) can push open the valve cover plug (71) and deform the elastic reset structure. The reset structure can make the valve cover plug (71) and the upper end of the pressure relief groove (61) fit tightly.

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