Pressure relief mechanism of pressure cooker

Abstract

The utility model relates to a pressure relief mechanism of a pressure cooker, which comprises a cooker cover, a first pressure relief channel is arranged on the cooker cover, a first pressure relief component capable of connecting or disconnecting the first pressure relief channel is arranged on the first pressure relief channel, and a second pressure relief channel is further arranged on the cooker cover. The second pressure relief channel is provided with a second pressure relief assembly capable of enabling the second pressure relief channel to be connected or disconnected, the second pressure relief assembly comprises a pressure relief piece, the pressure relief piece can be broken through pressure to enable the second pressure relief channel to be connected, and the pressure threshold value for enabling the first pressure relief channel to be connected through the first pressure relief assembly is smaller than the pressure threshold value for enabling the pressure relief piece to be broken. The pressure relief piece can break to conduct the second pressure relief channel when the first pressure relief assembly fails, so that 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, in particular to a pressure relief mechanism of a pressure cooker. Background Art

[0002] A pressure cooker, also known as a pressure cooker, is a type of cooker commonly used 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 inside a pressure cooker continues to rise and exceeds the safety limit, it may damage the cooker or even cause serious safety accidents such as explosion. Therefore, when the pressure inside the cooker reaches a certain level, the pressure cooker needs to release the excess pressure through a pressure relief device (such as a pressure limiting valve or safety valve) to ensure safe use.

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

[0005] Therefore, further improvement is needed. Utility Model Content

[0006] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art and to provide a pressure relief mechanism for a pressure cooker, which can still release pressure outwards through a second pressure relief component when a first pressure relief component fails, thereby improving the safety of the pressure cooker.

[0007] The purpose of this utility model is achieved in this way:

[0008] A pressure relief mechanism for a pressure cooker includes a lid, wherein the lid is provided with a first pressure relief channel, wherein the first pressure relief channel is provided with a first pressure relief assembly capable of opening or blocking the first pressure relief channel; the lid is also provided with a second pressure relief channel, wherein the second pressure relief channel is provided with a second pressure relief assembly capable of opening or blocking the second pressure relief channel; the second pressure relief assembly includes a pressure relief plate, which can rupture itself under pressure to open the second pressure relief channel; and a pressure threshold at which the first pressure relief assembly opens the first pressure relief channel is lower than a pressure threshold at which the pressure relief plate ruptures.

[0009] As a specific solution, the pressure relief piece is formed by processing a silicone material.

[0010] As a specific solution, the second pressure relief assembly also includes an upper positioning member and a lower positioning member. The upper positioning member passes through the pot cover from top to bottom. The lower positioning member is provided with a connecting groove, which is fixed to the lower section of the upper positioning member. The bottom of the connecting groove has a supporting step corresponding to the pressure relief piece. The upper and lower sides of the pressure relief piece are respectively abutted against the lower side of the upper positioning member and the supporting step of the lower positioning member, and the pressure relief piece blocks the second pressure relief channel.

[0011] As a specific solution, a convex rib portion protruding upward is provided at the periphery of the pressure relief plate, and the convex rib portion abuts against the lower side of the upper positioning member.

[0012] As a specific solution, an outer flange is provided on the upper side of the upper positioning member, and a sealing gasket is provided between the outer flange and the outer side of the pot cover, and the sealing gasket is tightly connected to the outer flange and the pot cover respectively.

[0013] As a specific solution, a guide slope is provided at the upper open end of the connecting groove, and the guide slope is inclined from bottom to top toward the outside.

[0014] As a specific solution, an upper through hole and a lower through hole are respectively provided on the inner sides of the upper positioning member and the lower positioning member. The upper through hole and the lower through hole are interconnected to form a second pressure relief channel.

[0015] As a specific solution, the lower positioning member is provided with a plurality of air inlet holes distributed along the circumferential direction, and the air inlet holes are arranged radially. The lower through hole can be connected with the lower space of the pot cover through the air inlet holes.

[0016] As a specific solution, the first pressure relief assembly includes a pressure relief valve core and a pressure relief valve cover. The pressure relief valve core has a pressure relief groove running through its upper and lower ends. The lower end of the pressure relief groove is connected to the lower space of the pot cover. The pressure relief valve cover is sleeved on the outside of the pressure relief valve core. A valve cover plug is provided on the pressure relief valve cover, and the valve cover plug can open or block the first pressure relief channel.

[0017] As a specific solution, an elastic reset structure is provided between the valve cover plug and the pressure relief valve cover. The pressure in the pressure relief groove can push open the valve cover plug and deform the elastic reset structure. The reset of the elastic reset structure can make the valve cover plug fit tightly with the upper end of the pressure relief groove.

[0018] The beneficial effects of the utility model are:

[0019] When the first pressure relief component fails, the pressure relief plate can rupture itself to open the second pressure relief groove, thereby releasing pressure outward and improving the safety of the pressure cooker. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a cross-sectional schematic diagram of an embodiment of the present utility model.

[0021] Figure 2 The structure of the embodiment of the utility model is shown in FIG. Figure 1 .

[0022] Figure 3 The structure of the embodiment of the utility model is shown in FIG. Figure 2 .

[0023] Figure 4 It is an enlarged view of A in embodiment of the present invention.

[0024] Figure 5 This is an enlarged view of Example B of the present invention. DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] See also Figure 1-Figure 5 The pressure relief mechanism of the pressure cooker includes a lid 1, which is provided with a first pressure relief channel 11. The first pressure relief channel 11 is provided with a first pressure relief component capable of opening or blocking the first pressure relief channel 11. The lid 1 is also provided with a second pressure relief channel 12. The second pressure relief channel 12 is provided with a second pressure relief component capable of opening or blocking the second pressure relief channel 12. The second pressure relief component includes a pressure relief plate 2. The pressure relief plate 2 can rupture itself under pressure to open the second pressure relief channel 12. When the first pressure relief component fails, the pressure relief plate 2 can rupture itself to open the second pressure relief channel 12, thereby releasing pressure outward and improving the safety of the pressure cooker.

[0027] The pressure threshold at which the first pressure relief component causes the first pressure relief channel 11 to be conductive is lower than the pressure threshold at which the pressure relief plate 2 ruptures. When the first pressure relief component operates normally, the pressure in the pressure cooker can be released outwards through the first pressure relief channel 11. Since the pressure threshold at which the first pressure relief component causes the first pressure relief channel 11 to be conductive is relatively low, the pressure of the pressure relief plate 2 can be released outwards through the first pressure relief channel 11 before rupture, thereby preventing the pressure in the pressure cooker from continuing to rise to the pressure threshold at which the pressure relief plate 2 ruptures. Therefore, the pressure relief plate 2 will not rupture or be damaged when the first pressure relief channel 11 operates normally.

[0028] Furthermore, the pressure relief piece 2 is formed by processing silicone material, which can ensure the high temperature resistance of the pressure relief piece 2. In addition, the manufacturer can change the pressure threshold of the rupture of the pressure relief piece 2 by designing pressure relief pieces 2 of different thicknesses. For example, when the pressure threshold of the rupture of the pressure relief piece 2 needs to be increased, the thickness of the pressure relief piece 2 can be increased. When the pressure threshold of the rupture of the pressure relief piece 2 needs to be reduced, the thickness of the pressure relief piece 2 can be reduced.

[0029] Furthermore, the second pressure relief assembly also includes an upper positioning member 3 and a lower positioning member 4. The upper positioning member 3 passes through the pot cover 1 from top to bottom. The lower positioning member 4 is provided with a connecting groove 41. The connecting groove 41 is connected and fixed to the lower section of the upper positioning member 3. The bottom of the connecting groove 41 has a supporting step 411 corresponding to the pressure relief plate 2. The upper and lower sides of the pressure relief plate 2 are respectively abutted against the lower side of the upper positioning member 3 and the supporting step 411 of the lower positioning member 4. The pressure relief plate 2 blocks the second pressure relief channel 12. The upper positioning member 3 cooperates with the lower positioning member 4 to install and fix the pressure relief plate 2.

[0030] Furthermore, a convex rib 21 protruding upward is provided at the peripheral position of the pressure relief piece 2, and the convex rib 21 abuts against the lower side of the upper positioning piece 3. Under the action of the convex rib 21, the lower end of the upper positioning piece 3 will not contact the middle position of the pressure relief piece 2 when the pressure is lower than the pressure threshold at which the pressure relief piece 2 ruptures, thereby reducing the chance of accidental rupture and damage of the pressure relief piece 2.

[0031] Furthermore, an outer flange 32 is provided on the upper side of the upper positioning member 3 , and the outer flange 32 can play the effect of installing in place, thereby improving the installation accuracy between the upper positioning member 3 and the pot cover 1 .

[0032] A sealing gasket 5 is provided between the outer flange 32 and the outer side of the pot cover 1. The sealing gasket 5 is tightly connected to the outer flange 32 and the pot cover 1 respectively. The sealing gasket 5 can play a buffering effect to prevent the outer flange 32 from directly contacting the pot cover 1. At the same time, it can also improve the sealing between the upper positioning member 3 and the pot cover 1 to avoid air leakage at the connection position between the two.

[0033] Furthermore, a guiding slope 412 is provided at the upper open end of the connection groove 41 , and the guiding slope 412 is inclined from bottom to top toward the outside, thereby improving the smoothness of the installation and connection process of the upper positioning member 3 and the lower positioning member 4 .

[0034] Furthermore, an upper through hole 31 and a lower through hole 42 are respectively provided on the inner sides of the upper positioning member 3 and the lower positioning member 4 . The upper through hole 31 and the lower through hole 42 are communicated with each other to form a second pressure relief channel 12 .

[0035] Furthermore, the lower positioning member 4 is provided with a plurality of air inlet holes 43 distributed along the circumferential direction. The air inlet holes 43 are arranged radially. The lower through hole 42 can be connected with the lower space of the pot cover 1 through the air inlet holes 43, thereby improving the efficiency of gas entering the lower through hole 42, so that when the pressure exceeds the pressure threshold of the pressure relief plate 2 to rupture, the pressure relief plate 2 can rupture more quickly.

[0036] Furthermore, the first 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 running through its upper and lower ends. The lower end of the pressure relief groove 61 is connected to the lower space of the pot cover 1. The pressure relief valve cover 7 is sleeved on the outer side of the pressure relief valve core 6. A valve cover plug 71 is provided on the pressure relief valve cover 7. The valve cover plug 71 can open or block the first pressure relief channel 11. The valve cover plug 71 can automatically open the first pressure relief channel 11 under the action of pressure.

[0037] 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 groove 61 can push open the valve cover plug 71 and deform the elastic reset structure. The reset of the elastic reset structure can make the valve cover plug 71 fit tightly with the upper end of the pressure relief groove 61. When the pressure of the pressure cooker reaches the pressure threshold that makes the first pressure relief channel 11 conductive, the valve cover plug 71 is pushed open under the action of pressure, thereby making the pressure relief groove 61 conductive outward, thereby achieving a pressure relief effect.

[0038] As an equivalent transformation, the first pressure relief component may also adopt the conventional structure of a pressure relief valve commonly used in existing pressure cookers, which can be understood by those skilled in the art.

[0039] The above embodiments are only preferred embodiments of the present invention, and other embodiments are possible. Those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the present invention, and these equivalent modifications or substitutions are all within the scope set by the claims of this application.

Claims

1. A pressure relief mechanism for a pressure cooker, comprising a cooker cover (1), wherein the cooker cover (1) is provided with a first pressure relief channel (11), and the first pressure relief channel (11) is provided with a first pressure relief component capable of opening or closing the first pressure relief channel (11), characterized in that: The pot cover (1) is further provided with a second pressure relief channel (12), and the second pressure relief channel (12) is provided with a second pressure relief component capable of opening or blocking the second pressure relief channel (12), the second pressure relief component comprising a pressure relief plate (2), the pressure relief plate (2) being capable of rupturing itself under pressure to open the second pressure relief channel (12), and the pressure threshold at which the first pressure relief component opens the first pressure relief channel (11) is lower than the pressure threshold at which the pressure relief plate (2) ruptures.

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

3. The pressure relief mechanism of the pressure cooker according to claim 1, characterized in that: The second pressure relief assembly further comprises an upper positioning member (3) and a lower positioning member (4), wherein the upper positioning member (3) passes through the pot cover (1) from top to bottom, and the lower positioning member (4) is provided with a connecting groove (41), wherein the connecting groove (41) is connected and fixed to the lower section of the upper positioning member (3), and the bottom of the connecting groove (41) has a supporting step (411) corresponding to the pressure relief plate (2), and the upper and lower sides of the pressure relief plate (2) respectively abut against the lower side of the upper positioning member (3) and the supporting step (411) of the lower positioning member (4), and the pressure relief plate (2) blocks the second pressure relief channel (12).

4. The pressure relief mechanism of the pressure cooker according to claim 3, characterized in that: A convex rib portion (21) protruding upward is provided at the periphery of the pressure relief plate (2), and the convex rib portion (21) abuts against the lower side of the upper positioning member (3).

5. The pressure relief mechanism of the pressure cooker according to claim 3, characterized in that: An outer flange (32) is provided on the upper side of the upper positioning member (3), and a sealing gasket (5) is provided between the outer flange (32) and the outer side of the pot cover (1). The sealing gasket (5) is tightly connected to the outer flange (32) and the pot cover (1), respectively.

6. The pressure relief mechanism of the pressure cooker according to claim 3, characterized in that: The upper open end of the connecting groove (41) is provided with a guide inclined surface (412), and the guide inclined surface (412) is arranged to be inclined from bottom to top toward the outside.

7. The pressure relief mechanism of the pressure cooker according to claim 3, characterized in that: An upper through hole (31) and a lower through hole (42) are respectively provided on the inner sides of the upper positioning member (3) and the lower positioning member (4); the upper through hole (31) and the lower through hole (42) are interconnected to form a second pressure relief channel (12).

8. The pressure relief mechanism of the pressure cooker according to claim 7, characterized in that: The lower positioning member (4) is provided with a plurality of air inlet holes (43) distributed along the circumferential direction. The air inlet holes (43) are arranged along the radial direction. The lower through hole (42) can communicate with the lower space of the pot cover (1) through the air inlet holes (43).

9. The pressure relief mechanism of a pressure cooker according to any one of claims 1 to 7, characterized in that: The first pressure relief assembly comprises 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) running through its upper and lower ends; the lower end of the pressure relief groove (61) is communicated with the lower space of the pot cover (1); the pressure relief valve cover (7) is sleeved on the outer side of the pressure relief valve core (6); a valve cover plug (71) is provided on the pressure relief valve cover (7); and the valve cover plug (71) can conduct or block the first pressure relief channel (11).

10. The pressure relief mechanism of the pressure cooker according to claim 9, characterized in that: 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 the valve cover plug (71) open and deform the elastic reset structure; and the elastic reset structure can be reset to enable the valve cover plug (71) to fit tightly with the upper end of the pressure relief groove (61).

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