Pressure limiting valve, pressure cooker cover and pressure cooker

Abstract

The utility model discloses a pressure limiting valve, a pressure cooker cover and a pressure cooker, and relates to the field of pressure cookers, the pressure limiting valve comprises a base, a valve body installed on the base and an operation assembly installed on the valve body, and a pressure relief cavity communicated with the outside is formed in the base; the valve body comprises a valve element and an exhaust pipe, and an air outlet channel is formed in the exhaust pipe. The operating assembly comprises an actuating part and a pressing cap linked with the valve element, the actuating part is connected with the pressing cap and can drive the pressing cap to be switched between a first position and a second position under the condition that the outer operating surface of the actuating part is pressed, and the pressing cap can be maintained at the first position and the second position; in the first position, the valve element closes the air outlet channel so that the air outlet channel can be separated from the pressure relief cavity, and in the second position, the valve element opens the air outlet channel so that the air outlet channel can be communicated with the pressure relief cavity. The exhaust valve has the advantages of being convenient to exhaust and stable in sealing.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure cookers, in particular to a pressure limiting valve, a pressure cooker cover and a pressure cooker. Background Art

[0002] A pressure cooker is a cooker that heats water and food in a sealed state. When the water is boiled, steam is generated, which increases the air pressure in the pot, thereby raising the boiling point of the water and the temperature in the pot, thereby achieving the purpose of cooking food quickly.

[0003] In order to achieve a certain air pressure in the pressure cooker and to exhaust the air when the air pressure in the cooker exceeds the safe range, a pressure limiting valve is usually provided on the cooker cover. Most of the pressure limiting valves in the related art realize the pressure limiting function by pressing on the exhaust pipe of the pressure cooker cover with their own weight. However, when exhausting the pressure cooker, the pressure limiting valve needs to be removed, which may cause the risk of being scalded by steam and is not convenient to use. In addition, the pressure limiting valve relying on gravity is prone to insufficient gravity due to the structural limitation of the cooker cover, which affects the stability of the pressure limiting. Utility Model Content

[0004] The utility model aims to solve one of the technical problems in the related art to a certain extent. To this end, the utility model provides a pressure limiting valve, a pressure cooker cover and a pressure cooker, which have the advantages of safe and convenient exhaust and stable pressure limiting.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A pressure-limiting valve comprises a base, a valve body mounted on the base and an operating assembly mounted on the valve body, wherein a pressure relief chamber connected to the outside is formed in the base; the valve body comprises a valve core and an exhaust pipe, and an air outlet channel is formed in the exhaust pipe; the operating assembly comprises an actuator and a pressing cap linked to the valve core, the actuator is connected to the pressing cap, and can drive the pressing cap to switch between a first position and a second position when an outer operating surface of the actuator is subjected to a pressing force, and the pressing cap can be maintained in the first position and the second position respectively; in the first position, the valve core closes the air outlet channel so that the air outlet channel is separated from the pressure relief chamber, and in the second position, the valve core opens the air outlet channel so that the air outlet channel is connected to the pressure relief chamber.

[0007] The utility model provides a pressure limiting valve, which includes a valve core and an exhaust pipe that cooperate with each other, and also includes a push cap that is linked to the valve core, the push cap has a first position and a second position with different heights, when the push cap is in the first position, the valve core seals the air outlet channel in the exhaust pipe, and when the push cap is in the second position, the valve core opens the air outlet channel. By pressing the outer operating surface of the actuator, the push cap can be switched between the first position and the second position, that is, the pressure relief of the air outlet channel can be controlled by pressing the actuator, and one-button press exhaust is achieved, the operation is simple and convenient, and can effectively avoid scalding by steam. And the valve core can maintain sealing contact with the exhaust pipe under the action of the pressurized elastic member, the pressure limiting is stable, and it is suitable for promotion.

[0008] Optionally, there is a rotating member between the pressing cap and the actuator, and the operating assembly includes a valve shell arranged around the actuator, and a guide maintaining groove is arranged at the bottom of the valve shell, and the guide maintaining groove includes a first limiting recess and a second limiting recess alternately arranged circumferentially of the valve shell, and the adjacent first limiting recesses are connected to the second limiting recesses; when the outer operating surface of the actuator is subjected to pressing force, the rotating member can drive the pressing cap to rotate under the guidance of the guide maintaining groove, so as to maintain the first position under the limiting action of the first limiting recess, and maintain the second position under the limiting action of the second limiting recess.

[0009] Optionally, the rotating component includes a first bevel tooth distributed along the circumference of the push cap and a second bevel tooth distributed along the circumference of the actuator, the first bevel tooth has a first inclined surface, and the second bevel tooth has a second inclined surface opposite to the first bevel tooth; a guide bevel surface for guiding the movement of the first bevel tooth is formed at the bottom of the valve housing; the first bevel surface abuts against the second bevel surface so that the actuator drives the push cap to rotate along the guide bevel surface under the action of the pressing force.

[0010] Optionally, the first limiting recess and the second limiting recess both have an open end and a closed end, and the distance from the closed end of the first limiting recess to the bottom of the valve housing is smaller than the distance from the closed end of the second limiting recess to the bottom of the valve housing; when the pressing cap is in the first position, the first bevel tooth is engaged with the closed end of the first limiting recess, and when the pressing cap is in the second position, the first bevel tooth is engaged with the closed end of the second limiting recess.

[0011] Optionally, a plurality of single teeth are distributed circumferentially on the outer side wall of the actuator; as the outer operating surface of the actuator is subjected to pressing force, the single teeth slide along the second limiting recess and are engaged at the closed end of the second limiting recess to stop the actuator.

[0012] Optionally, a mounting hole is provided in the middle of the pressing cap, the top end of the valve core passes through the mounting hole, a first boss extending toward the top end of the valve core is formed at the top of the mounting hole, and a second boss cooperating with the first boss is formed at the top end of the valve core.

[0013] Optionally, a pressurized elastic member is arranged between the push cap and the valve core, so that when the push cap is in the first position, the valve core is squeezed toward the exhaust pipe; one end of the pressurized elastic member abuts against the inner wall surface of the push cap, and the other end abuts against the outer wall surface of the valve core; a reset elastic member is also arranged between the push cap and the valve core, and the reset elastic member and the pressurized elastic member are both cylindrical springs, and the reset elastic member is sleeved on the outside of the pressurized elastic member; one end of the reset elastic member abuts against the inner wall surface of the push cap, and the other end abuts against the inner wall surface of the base, and the inner wall surface of the push cap is opposite to the inner wall surface of the base.

[0014] Optionally, a hollow cavity is formed in the base, a sealing sheet is arranged in the hollow cavity, the sealing sheet is fixed to the inner wall of the base and encloses the base to form the pressure relief cavity, and a pressure relief port connected to the pressure relief cavity is opened on the base.

[0015] In addition, the utility model also provides a pressure cooker cover, the pressure limiting valve is installed on the cover, a through hole is provided on the cover, the exhaust pipe end passes through the base and is assembled in the through hole, and the base is installed on the outer surface of the cover. The reasoning process of the beneficial effects of the pressure cooker cover provided by the utility model is similar to that of the pressure limiting valve, which will not be repeated here.

[0016] In addition, the utility model also provides a pressure cooker, comprising a pressure cooker cover and a cooker body, wherein the pressure cooker cover comprises any one of the pressure limiting valves described above. The reasoning process of the beneficial effects of the pressure cooker provided by the utility model and the pressure cooker cover described above is similar, and will not be repeated here.

[0017] These features and advantages of the utility model will be disclosed in detail in the following specific embodiments and drawings. The best implementation or means of the utility model will be fully presented in conjunction with the drawings, but it is not a limitation of the technical solution of the utility model. In addition, these features, elements and components appearing in each of the following texts and drawings are multiple, and are marked with different symbols or numbers for convenience, but all represent components with the same or similar structure or function. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings:

[0019] Figure 1 This is a schematic diagram of the assembly of the pot cover and the pressure limiting valve of the utility model;

[0020] Figure 2 This is an explosion diagram of the pressure limiting valve in the utility model;

[0021] Figure 3 It is a cross-sectional view of the limit valve when the pressing cap is located at the first position in the utility model;

[0022] Figure 4 It is a cross-sectional view of the limit valve when the pressing cap is located at the second position in the utility model;

[0023] Figure 5 This is a cross-sectional view of the pressure limiting valve in the utility model after explosion;

[0024] Figure 6 It is a schematic diagram of the cooperation between the actuating member and the pressing cap in the utility model;

[0025] Figure 7 It is a schematic diagram of the cooperation between the valve housing and the pressing cap in the utility model.

[0026] Among them, 1. pressure limiting valve; 11. base; 111. pressure relief chamber; 112. sealing plate; 113. pressure relief port; 12. valve body; 121. valve core; 1211. second boss; 122. exhaust pipe; 1221. air outlet channel; 123. operating component; 1231. pressing cap; 1231a. first oblique tooth; 1231b. mounting hole; 1231c. first boss; 1232. actuator; 1232a. second oblique tooth; 1232b. single tooth; 1233. valve housing; 1233a. first limiting recess; 1233b. second limiting recess; 124. elastic member; 1241. pressurized elastic member; 1242. reset elastic member; 2. pot cover. DETAILED DESCRIPTION

[0027] The following is a detailed description of embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments in the implementation manner are intended to be used to explain the present invention and should not be construed as limiting the present invention.

[0028] References in this specification to "one embodiment" or "an example" or "an example" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment itself may be included in at least one embodiment of the present patent disclosure. The appearance of the phrase "in one embodiment" in various places in the specification does not necessarily refer to the same embodiment.

[0029] Example:

[0030] This embodiment provides a pressure limiting valve 1, such as Figure 1As shown, it includes a base 11, a valve body 12 installed on the base 11, and an operating assembly 123 installed on the valve body 12. A pressure relief chamber 111 communicating with the outside is formed in the base 11; the valve body 12 includes a valve core 121 and an exhaust pipe 122, and an air outlet channel 1221 is formed in the exhaust pipe 122; the operating assembly 123 includes an actuating member 1232 and a pressing cap 1231 linked to the valve core 121, the actuating member 1232 is connected to the pressing cap 1231, and can drive the pressing cap 1231 to move when the outer operating surface of the actuating member 1232 is pressed. The pressing cap 1231 can switch between a first position and a second position, and can be maintained in the first position and the second position respectively; in the first position, the valve core 121 closes the air outlet channel 1221 to separate the air outlet channel 1221 from the pressure relief chamber 111, and in the second position, the valve core 121 opens the air outlet channel 1221 to communicate with the pressure relief chamber 111; a pressurized elastic member 1241 is provided between the pressing cap 1231 and the valve core 121, so that when the pressing cap 1231 is in the first position, the valve core 121 is squeezed toward the exhaust pipe 122.

[0031] In this embodiment, if Figure 2 and Figure 3 As shown, the pressure-limiting valve 1 includes a base 11 and a valve body 12 installed on the base 11. A bowl-shaped space is formed in the base 11, and the valve body 12 is installed in the bowl-shaped space. A pressure relief chamber 111 for relieving pressure inside the pressure cooker is formed in the base 11. The pressure relief chamber 111 is connected to the external environment of the pressure cooker to reduce the pressure inside the pressure cooker. The valve body 12 includes an exhaust pipe 122, a valve core 121 installed on the exhaust pipe 122, and an operating component 123 that cooperates with the valve core 121. A hollow air outlet channel 1221 connecting the pressure relief chamber 111 and the inside of the pressure cooker is formed in the exhaust pipe 122. The valve core 121 is installed on the exhaust pipe 122 to control the opening or closing of the air outlet channel 1221, thereby controlling the pressure inside the pressure cooker to achieve pressure relief, that is, the exhaust pipe 122 is the exhaust pipe of the pressure cooker. Specifically, the operating component 123 includes a connected actuator 1232 and a pressing cap 1231, as shown in FIG. Figure 3 , Figure 4 and Figure 5 As shown, the push cap 1231 is linked with the valve core 121 and the push cap 1231 has a first position and a second position with different heights. When the push cap 1231 is in the first position, the valve core 121 seals the air outlet channel 1221. When the push cap 1231 is in the second position, the valve core 121 opens the air outlet channel 1221. By pressing the outer operating surface of the actuator 1232, the push cap 1231 can be switched between the first position and the second position, that is, the pressure relief of the air outlet channel 1221 can be controlled by pressing the actuator 1232, thereby realizing one-button press to exhaust. The operation is simple and convenient, and can effectively avoid scalding by steam.

[0032] There is a rotating member between the pressing cap 1231 and the actuator 1232, and the operating component 123 includes a valve shell 1233 arranged around the actuator 1232, and a guide maintaining groove is arranged at the bottom of the valve shell 1233, and the guide maintaining groove includes a first limiting recess 1233a and a second limiting recess 1233b which are alternately arranged circumferentially of the valve shell 1233, and the adjacent first limiting recess 1233a is connected to the second limiting recess 1233b; when the outer operating surface of the actuator 1232 is subjected to pressing force, the rotating member can drive the pressing cap 1231 to rotate under the guidance of the guide maintaining groove, so as to maintain it in the first position under the limiting action of the first limiting recess 1233a, and maintain it in the second position under the limiting action of the second limiting recess 1233b.

[0033] like Figure 6 As shown, in this embodiment, there is a rotating member between the pressing cap 1231 and the actuating member 1232, and a guide maintenance groove is provided at the bottom of the valve housing 1233. The operating assembly 123 also includes a valve housing 1233 arranged around the actuating member 1232, the valve housing 1233 is sleeved on the outside of the pressing cap 1231, and the valve housing 1233 includes an inner wall and an outer wall, the outer wall and the inner wall are connected at one end, and are separated at the other end to form an annular cavity. When the pressing cap 1231 rotates under the action of the actuator 1232, the first bevel tooth 1231a on the pressing cap 1231 selectively engages with the first limiting recess 1233a or the second limiting recess 1233b. When the pressing cap 1231 is in the first position, it can press against the pressurized elastic member 1241, so that the pressurized elastic member 1241 applies downward pressure to the valve core 121, keeping the valve core 121 in close contact with the exhaust pipe 122. When the pressing cap 1231 is in the second position, it no longer applies force to the elastic member 124, and the elastic member 124 no longer presses against the valve core 121. At this time, the valve core 121 is separated from the exhaust pipe 122.

[0034] The rotating component includes a first bevel tooth 1231a distributed along the circumference of the pressing cap 1231 and a second bevel tooth 1232a distributed along the circumference of the actuator 1232. The first bevel tooth 1231a has a first inclined surface, and the second bevel tooth 1232a has a second inclined surface opposite to the first bevel tooth 1231a. A guiding bevel surface for guiding the movement of the first bevel tooth 1231a is formed at the bottom of the valve housing 1233. The first bevel surface abuts against the second bevel surface so that the actuator 1232 drives the pressing cap 1231 to rotate along the guiding bevel surface under the action of the pressing force.

[0035] In this embodiment, a plurality of first oblique teeth 1231a are evenly distributed along the circumferential direction at the bottom of the pressing cap 1231, and a plurality of second oblique teeth 1232a abutting against the first oblique teeth 1231a are circumferentially arranged at the bottom of the actuator 1232. The first oblique teeth 1231a have a first inclined surface, and the second oblique teeth 1232a have a second inclined surface. The first inclined surface is parallel to the second inclined surface. When the actuator 1232 is pressed downward, the second inclined surface also moves downward, causing the first inclined surface to move along the second inclined surface, and the pressing cap 1231 as a whole also rotates, that is, when the actuator 1232 moves downward, it can force the pressing cap 1231 to rotate as a whole. In this embodiment, when the actuator 1232 is pressed, the first beveled tooth 1231a on the actuator 1232 drives the pressing cap 1231 to rotate. When the pressing cap 1231 rotates, the first beveled tooth 1231a selectively engages with the first limiting recess 1233a or the second limiting recess 1233b. Since the first limiting recess 1233a and the second limiting recess 1233b have different heights, the pressing cap 1231 can achieve its own lifting and lowering by rotating. A guiding inclined surface for guiding the movement of the first beveled tooth 1231a is formed between the opening end of the first limiting recess 1233a and the opening end of the second limiting recess 1233b. The guiding inclined surface enables the first beveled tooth 1231a to move smoothly between the first limiting recess 1233a and the second limiting recess 1233b without stagnation.

[0036] Both the first limiting recess 1233a and the second limiting recess 1233b have an open end and a closed end, and the distance from the closed end of the first limiting recess 1233a to the bottom of the valve housing 1233 is smaller than the distance from the closed end of the second limiting recess 1233b to the bottom of the valve housing 1233; when the pressing cap 1231 is in the first position, the first oblique tooth 1231a is clamped at the closed end of the first limiting recess 1233a, and when the pressing cap 1231 is in the second position, the first oblique tooth 1231a is clamped at the closed end of the second limiting recess 1233b.

[0037] In this embodiment, if Figure 7As shown, the bottom of the inner wall is circumferentially distributed with a first limiting recess 1233a and a second limiting recess 1233b which are staggered. Both the first limiting recess 1233a and the second limiting recess 1233b have an open end at the lower end and a closed end at the upper end. The closed end of the first limiting recess 1233a is lower than the closed end of the second limiting recess 1233b, that is, the first limiting recess 1233a is lower than the second limiting recess 1233b. Therefore, it can be seen that the first position of the pressing cap 1231 is lower than the second position of the pressing cap 1231. When the pressing cap 1231 is in the first position, the first oblique tooth 1231a is clamped on the closed end of the first limiting recess 1233a, and the first oblique tooth 1231a can no longer move up along the first limiting recess 1233a. When the pressing cap 1231 is in the second position, the first oblique tooth 1231a is clamped on the closed end of the second limiting recess 1233b, and the second oblique tooth 1232a can no longer move up along the second limiting recess 1233b.

[0038] The outer wall of the actuator 1232 has a plurality of single teeth 1232b distributed along the circumferential direction. As the outer operating surface of the actuator 1232 is pressed, the single teeth 1232b slide along the second limiting recess 1233b and are engaged at the closed end of the second limiting recess 1233b to stop the actuator 1232.

[0039] In this embodiment, the single teeth 1232b on the outer periphery of the actuator 1232 can stop the actuator 1232 and prevent the actuator 1232 from rotating arbitrarily in the valve housing 1233 to avoid affecting the exhaust. Specifically, the single teeth 1232b are evenly distributed along the circumference on the outer side wall of the actuator 1232 to improve the stability of the actuator 1232.

[0040] A mounting hole 1231b is provided in the middle of the pressing cap 1231, and the top of the valve core 121 passes through the mounting hole 1231b. A first boss 1231c extending toward the top of the valve core 121 is formed at the top of the mounting hole 1231b, and a second boss 1211 cooperating with the first boss 1231c is formed at the top of the valve core 121.

[0041] In this embodiment, a mounting hole 1231b is provided in the middle of the pressing cap 1231 to allow the top end of the valve core 121 to pass through, and the diameter of the mounting hole 1231b is larger than the diameter of the top end of the valve core 121 to prevent the valve core 121 from affecting the rotation of the pressing cap 1231. The first boss 1231c at the top of the mounting hole 1231b cooperates with the second boss 1211 at the top end of the valve core 121 so that the pressing cap 1231 can drive the valve core 121 to move upward when moving upward.

[0042] A pressurizing elastic member 1241 is arranged between the pressing cap 1231 and the valve core 121, so that when the pressing cap 231 is in the first position, the valve core 121 is squeezed toward the exhaust pipe 122; one end of the pressurizing elastic member 1241 abuts against the inner wall surface of the pressing cap 1231, and the other end abuts against the outer wall surface of the valve core 121; a reset elastic member 1242 is also arranged between the pressing cap 1231 and the valve core 121, and the reset elastic member 1242 and the pressurizing elastic member 1241 are both cylindrical springs, and the two constitute the elastic component 124, and the reset elastic member 1242 is sleeved on the outside of the pressurizing elastic member 1241; one end of the reset elastic member 1242 abuts against the inner wall surface of the pressing cap 1231, and the other end abuts against the inner wall surface of the base 11, and the inner wall surface of the pressing cap 1231 is opposite to the inner wall surface of the base 11.

[0043] In this embodiment, the valve core 121 may not be able to stably and safely seal the pressure cooker by gravity when it is restricted by the valve body structure. In this case, a pressurizing elastic member 1241 may be provided between the pressing cap 1231 and the valve core 121. The two ends of the pressurizing elastic member 1241 respectively press against the pressing cap 1231 and the valve core 121. When the pressing cap 1231 is in the first position, the pressurizing elastic member 1241 presses the valve core 121 toward the exhaust pipe 122 to keep the valve core 121 and the exhaust pipe 122 in cooperation. Under the action of the pressurizing elastic member 1241, the valve core 121 can maintain a sealed contact with the exhaust pipe 122, and the pressure limiting is stable, which is suitable for promotion.

[0044] In this embodiment, the reset elastic member 1242 is used to lift up the pressing cap 1231 , and the height of the pressurizing elastic member 1241 is smaller than that of the reset elastic member 1242 .

[0045] A hollow cavity is formed in the base 11 , in which a sealing sheet 112 is disposed. The sealing sheet 112 is fixed to the inner wall of the base 11 and encloses the base 11 to form a pressure relief cavity 111 . A pressure relief port 113 communicating with the pressure relief cavity 111 is provided on the base 11 .

[0046] In this embodiment, an elastic sealing sheet 112 is disposed in the hollow cavity of the base 11 . The sealing sheet 112 and the base 11 enclose a pressure relief chamber 111 . The pressure relief chamber 111 has a pressure relief port 113 connected to the outside. The pressure relief port 113 is opened on the base 11 .

[0047] This embodiment also provides a pressure cooker cover, on which the aforementioned pressure limiting valve 1 is installed. The cover is provided with a through hole, and the end of the exhaust pipe 122 passes through the base 11 and is assembled in the through hole. The base 11 is installed on the outer surface of the cover.

[0048] In this embodiment, a through hole is opened on the pot cover, and the end of the exhaust pipe 122 passes through the base 11 and enters the pot body. Specifically, an external thread is opened at the end of the exhaust pipe 122, and a fastener such as a bolt is installed on the external thread to fix the pressure limiting valve 1.

[0049] In this embodiment, a pressure cooker is further provided, comprising a pressure cooker cover and a cooker body, wherein the pressure cooker cover comprises the aforementioned pressure limiting valve 1.

[0050] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present invention shall be included in the scope of the claims.

Claims

1. A pressure limiting valve, characterized in that: The invention comprises a base (11), a valve body (12) mounted on the base (11), and an operating assembly (123) mounted on the valve body (12); the base (11) is formed with a pressure relief chamber (111) communicating with the outside; the valve body (12) comprises a valve core (121) and an exhaust pipe (122); an exhaust pipe (122) is formed with an exhaust channel (1221); the operating assembly (123) comprises an actuating member (1232) and a pressing cap (1231) linked to the valve core (121); the actuating member (1232) is connected to the pressing cap (1231) and can be operated in the exhaust pipe (1221); When the outer operating surface of the actuator (1232) is subjected to a pressing force, the pressing cap (1231) is driven to switch between a first position and a second position, and the pressing cap (1231) can be maintained in the first position and the second position, respectively; in the first position, the valve core (121) closes the air outlet channel (1221) so that the air outlet channel (1221) is separated from the pressure relief chamber (111); in the second position, the valve core (121) opens the air outlet channel (1221) so that the air outlet channel (1221) is connected to the pressure relief chamber (111).

2. The pressure limiting valve according to claim 1, characterized in that: A hollow cavity is formed in the base (11), a sealing sheet (112) is arranged in the hollow cavity, the sealing sheet (112) is fixed to the inner wall of the base (11) and encloses the base (11) to form the pressure relief cavity (111), and a pressure relief port (113) connected to the pressure relief cavity (111) is provided on the base (11).

3. The pressure limiting valve according to claim 1, characterized in that: A rotating member is provided between the pressing cap (1231) and the actuating member (1232), the operating assembly (123) comprises a valve housing (1233) arranged around the actuating member (1232), a guide maintaining groove being provided at the bottom of the valve housing (1233), the guide maintaining groove comprising a first limiting recess (1233a) and a second limiting recess (1233b) arranged alternately in the circumferential direction of the valve housing (1233), and adjacent first limiting recesses (1233a) are connected to the second limiting recesses (1233b); when the outer operating surface of the actuating member (1232) is subjected to a pressing force, the rotating member can drive the pressing cap (1231) to rotate under the guidance of the guide maintaining groove, so as to be maintained in the first position under the limiting action of the first limiting recess (1233a) and maintained in the second position under the limiting action of the second limiting recess (1233b).

4. The pressure limiting valve according to claim 3, characterized in that: The rotating component includes a first bevel tooth (1231a) distributed along the circumference of the pressing cap (1231) and a second bevel tooth (1232a) distributed along the circumference of the actuator (1232), wherein the first bevel tooth (1231a) has a first inclined surface, and the second bevel tooth (1232a) has a second inclined surface opposite to the first bevel tooth (1231a); a guiding bevel surface for guiding the movement of the first bevel tooth (1231a) is formed at the bottom of the valve housing (1233); the first bevel surface abuts against the second bevel surface so that the actuator (1232) drives the pressing cap (1231) to rotate along the guiding bevel surface under the action of the pressing force.

5. The pressure limiting valve according to claim 4, characterized in that: The first limiting recess (1233a) and the second limiting recess (1233b) both have an open end and a closed end, and the distance from the closed end of the first limiting recess (1233a) to the bottom of the valve housing (1233) is smaller than the distance from the closed end of the second limiting recess (1233b) to the bottom of the valve housing (1233); when the pressing cap (1231) is in the first position, the first oblique tooth (1231a) is clamped to the closed end of the first limiting recess (1233a), and when the pressing cap (1231) is in the second position, the first oblique tooth (1231a) is clamped to the closed end of the second limiting recess (1233b).

6. The pressure limiting valve according to claim 4, characterized in that: The outer side wall of the actuator (1232) is provided with a plurality of single teeth (1232b) distributed along the circumferential direction. As the outer operating surface of the actuator (1232) is subjected to pressing force, the single tooth (1232b) slides along the second limiting recess (1233b) and is engaged with the closed end of the second limiting recess (1233b) to stop the actuator (1232).

7. The pressure limiting valve according to claim 3, characterized in that: A mounting hole (1231b) is provided in the middle of the pressing cap (1231), and the top end of the valve core (121) passes through the mounting hole (1231b). A first boss (1231c) extending toward the top end of the valve core (121) is formed at the top of the mounting hole (1231b), and a second boss (1211) cooperating with the first boss (1231c) is formed at the top of the valve core (121).

8. The pressure limiting valve according to claim 3, characterized in that: A pressurizing elastic member (1241) is provided between the pressing cap (1231) and the valve core (121), so that when the pressing cap (1231) is in the first position, the valve core (121) is pressed toward the exhaust pipe (122); one end of the pressurizing elastic member (1241) abuts against the inner wall surface of the pressing cap (1231), and the other end abuts against the outer wall surface of the valve core (121); a pressurizing elastic member (1241) is provided between the pressing cap (1231) and the valve core (121); A reset elastic member (1242) is provided, the reset elastic member (1242) and the pressurizing elastic member (1241) are both cylindrical springs, the reset elastic member (1242) is sleeved on the outside of the pressurizing elastic member (1241); one end of the reset elastic member (1242) abuts against the inner wall surface of the pressing cap (1231), and the other end abuts against the inner wall surface of the base (11), and the inner wall surface of the pressing cap (1231) is opposite to the inner wall surface of the base (11).

9. A pressure cooker cover, characterized in that: The pot cover is installed with a pressure limiting valve (1) as described in any one of claims 1 to 8, and the pot cover is provided with a through hole, the end of the exhaust pipe (122) passes through the base (11) and is assembled in the through hole, and the base (11) is installed on the outer surface of the pot cover.

10. A pressure cooker, comprising a pressure cooker cover and a cooker body, characterized in that: The pressure cooker cover comprises the pressure limiting valve (1) according to claim 9.

Images