Pressure valve body structure and cookware using same

Abstract

The invention provides a pressure valve body structure and a cooker using the same. The pressure valve body structure comprises a valve column, a valve bonnet and a valve element. The valve column is provided with a steam passing channel penetrating through the two ends of a column body, one end of the valve column is sunken towards the steam passing channel to form a containing cavity, and the bottom of the containing cavity is communicated with the steam passing channel. A locking cavity used for locking the containing cavity is formed in the valve bonnet, and a steam dispersing opening communicated with the locking cavity is formed in the top of the valve bonnet. The valve element is movably arranged in the containing cavity and seals the steam flowing channel. The valve element is provided with a spring, and the spring is made of titanium alloy. According to the pressure valve body structure and the cooker using the same, the problem that the service life of a spring is shortened under stamping of high-temperature vapor pressure is solved, and the problem that the pressure regulation of a valve body is unstable due to the fact that the deformation capacity of the spring becomes poor is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of pressure valves, and in particular relates to a pressure valve body structure and a cooker using the same. Background Art

[0002] Pressure cookers are a common type of cookware, mostly used for outdoor camping or kitchen cooking. They use the physical phenomenon that the boiling point of liquids increases under higher vapor pressure, allowing water to reach a higher temperature without boiling, thereby speeding up the efficiency of stewing food. When the vapor pressure in the pot reaches a certain pressure value, the pressure valve on the lid will be pushed open to exhaust steam.

[0003] The valve body structure of the pressure valve generally adopts the form of a spring and a valve core combination to achieve steam exhaust. In the process of exhausting steam, due to the pressure relief of the steam pressure, the spring is constantly squeezed by the valve core under high temperature conditions and deformed. The deformation ability of the spring under high temperature conditions is easily weakened, resulting in a shortened service life of the spring. At the same time, because the elastic ability of the spring is weakened, the lifting effect of the valve core becomes worse, resulting in insufficient pressure regulating ability of the valve body and unstable steam pressure of the pressure valve. Summary of the invention

[0004] In view of the problems raised by the background technology, the present invention provides a pressure valve body structure and a cookware using the same, which solves the problem that the service life of the spring is shortened under the stamping of high-temperature steam pressure.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A pressure valve body structure comprises a valve stem, a valve cap and a valve core;

[0007] The valve column is provided with a steam passage that runs through both ends of the column body, and the steam passage is provided with a steam inlet and a steam outlet. One end of the valve column is recessed toward the steam passage to form a receiving cavity, and the bottom of the receiving cavity is connected to the steam outlet of the steam passage.

[0008] A locking cavity for locking the accommodating cavity is arranged inside the valve bonnet, and a steam dissipation port communicating with the locking cavity is arranged on the top of the valve bonnet;

[0009] The valve core is movably placed in the accommodating cavity and seals the steam passage;

[0010] The valve core is provided with a spring, and the spring is made of titanium alloy.

[0011] Preferably, the apertures of the steam inlet and outlet are 2.0-5.5 mm;

[0012] The aperture of the steam dissipation port is 2.0-3.5 mm.

[0013] Preferably, the total length of the spring in the natural state is 6.6 mm-11.5 mm, the wire diameter is 0.36 mm, and the number of effective turns of the spring body is 5 turns.

[0014] Preferably, the wall surface of the accommodating cavity is inclined relative to the steam passage;

[0015] A steam dispersion space is reserved between the accommodating cavity and the steam dispersion port;

[0016] The abutting portion of the valve core is provided with a cone, and the cone surface of the cone abuts against the wall surface of the accommodating cavity so that the cone is placed in the accommodating cavity and can movably seal the steam passage;

[0017] The spring is installed on the mounting portion of the valve core;

[0018] In the steam outlet state, the steam pressure enters the steam outlet channel and lifts the valve core to open the steam outlet channel so that the steam outlet channel is connected to the steam dispersion space. The steam pressure forms a spiral cyclone under the action of the spring. The spiral cyclone travels back and forth in the steam dispersion space and overflows from the steam dispersion port.

[0019] Preferably, one end of the spring is fixed to the mounting portion of the valve core, and the other end is abutted against the steam dispersion port.

[0020] Preferably, the mounting portion comprises a clamping block, one end of the spring is inserted into the clamping block, and the middle portion of the clamping block protrudes outward in an annular direction to clamp the spring.

[0021] Preferably, the mounting portion comprises a cavity with a built-in thread groove, and the thread at one end of the spring cooperates with the thread groove and is screwed into the cavity.

[0022] Preferably, the cone includes a cone body and a cone tip;

[0023] The conical surface corresponding to the conical tip abuts against the wall surface corresponding to the lower part of the accommodating chamber, and the conical tip is inserted into the steam passage;

[0024] A gap is formed between the conical surface corresponding to the conical body and the wall surface corresponding to the upper part of the accommodating cavity.

[0025] Preferably, the angle formed by the connecting lines of the cone surfaces on both sides of the vertical section of the cone tip is 47°-88°.

[0026] A cooker comprises a cooker cover and a cooker body used in conjunction with each other, wherein the cooker cover is equipped with any one of the pressure valve body structures described above.

[0027] Compared with the prior art, one of the above technical solutions has the following beneficial effects:

[0028] This technical solution uses titanium alloy to make a spring, which is applied to the valve core of the pressure valve. The high melting point, high temperature resistance and deformation memory of titanium alloy are used to increase the service life of the spring under high-temperature steam pressure stamping, thereby avoiding the problem of unstable pressure regulation of the valve body due to the weakening of the spring deformation ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of a cooker with a pressure valve body structure of the present invention;

[0030] Figure 2 is a structural schematic diagram of a pressure valve body according to a first embodiment of the present invention;

[0031] Figure 3 It is a structural schematic diagram of the pressure valve body (with a clamping block) of the present invention;

[0032] Figure 4 is a structural schematic diagram of a pressure valve body according to a second embodiment of the present invention;

[0033] Figure 5 It is a schematic structural diagram of a pressure valve body (with a cavity) of the present invention;

[0034] Figure 6 It is an exploded view of the pressure valve body (with a clamping block) of the present invention;

[0035] Figure 7 It is an exploded view of the pressure valve body (with a cavity) of the present invention.

[0036] Valve column 1, steam passage 11, steam inlet 12, steam outlet 13, accommodating chamber 14, valve cap 2, steam dissipation space 21, steam dissipation outlet 22, valve core 3, cone 31, cone body 311, cone tip 312, clamping block 32, cavity 33, spring 4, pot cover 5, pot body 6. DETAILED DESCRIPTION

[0037] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0038] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] The terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, device, product or end including a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units inherent to these processes, methods, products or ends.

[0040] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0041] The valve body structure of the pressure valve generally adopts the form of a spring and a valve core combination to realize steam exhaust. During the process of exhausting steam, due to the pressure relief of the steam pressure, the spring is constantly squeezed by the valve core under high temperature and deformed. The deformation ability of the spring under high temperature is easily weakened and the spring is solidified, resulting in a shortened life of the spring.

[0042] In order to solve the above problems, Figures 1 to 7 As shown, the present application proposes a pressure valve body structure, including a valve column 1, a valve cap 2 and a valve core 3;

[0043] The valve column 1 is provided with a steam passage 11 penetrating through both ends of the column, one end of the valve column 1 is recessed toward the steam passage 11 to form a receiving cavity 14, and the bottom of the receiving cavity 14 is connected to the steam passage 11;

[0044] The valve column 1 comprises a steam inlet 12 and a steam outlet 13 which are arranged opposite to each other. The steam outlet 13 is arranged at the bottom of the accommodating cavity 14 and communicates with the steam passage 11.

[0045] The steam inlet 12 is connected to the steam passage 11;

[0046] The valve bonnet 2 is provided with a locking cavity for locking the accommodating cavity 14, and the top of the valve bonnet 2 is provided with a steam dissipation port 22 connected to the locking cavity;

[0047] The valve core 3 is movably placed in the accommodating cavity 14 and seals the steam passage 11;

[0048] The valve core 3 is provided with a spring 4 which is made of titanium alloy.

[0049] The wall surface of the accommodating cavity 14 is inclined relative to the steam passage 11;

[0050] A steam dispersion space 21 is reserved between the accommodating cavity 14 and the steam dispersion port 22;

[0051] The abutting portion of the valve core 3 is provided with a cone 31, and the cone surface of the cone 31 abuts against the wall surface of the accommodating cavity 14 so that the cone 31 is placed in the accommodating cavity 14 and can movably seal the steam passage 11;

[0052] The spring 4 is installed on the mounting portion of the valve core 3;

[0053] In the steam outlet state, the steam pressure enters the steam outlet channel and lifts the valve core 3 to open the steam outlet channel 11 so that the steam outlet channel 11 is connected to the steam dispersion space 21 . The steam pressure forms a spiral cyclone under the action of the spring 4 . The spiral cyclone travels back and forth between the steam dispersion space 21 and overflows from the steam dispersion port 22 .

[0054] In this embodiment, the pressure valve is composed of three components: a valve column 1, a valve cap 2 and a valve core 3. The valve column 1 is a column structure, and a steam inlet 12 and a steam outlet 13 are respectively opened at both ends of the column. A steam passage 11 is opened between the steam inlet 12 and the steam outlet 13, that is, inside the column. One end of the steam inlet 12 is located inside the cooker, and one end of the steam outlet 13 is located outside the cooker. When cooking, when the pressure in the cooker has not reached a certain level, the pressure valve cannot pass steam to avoid the pressure in the cooker. Insufficient force causes the food to not be cooked, so in this embodiment, a receiving chamber 14 is opened at one end of the steam outlet 13 of the valve column 1, and a valve core 3 is placed in the receiving chamber 14 to seal the steam passage 11. Only when the pressure in the pot reaches a critical value, the steam pressure pushes up the valve core 3 from the steam inlet 12 along the steam passage 11, opens the steam outlet 13, and makes the steam passage 11 communicate with the steam dissipation space 21, and the steam pressure is released from the steam dissipation port 22 of the steam dissipation space 21 to the outside of the pot;

[0055] Furthermore, in order to solve the problem that the deformation ability of the spring 4 deteriorates under the continuous stamping of high-temperature steam pressure, resulting in a shortened service life, and then the lifting effect of the valve core 3 deteriorates, resulting in insufficient pressure regulating ability of the valve body and unstable steam pressure of the pressure valve, the present application improves the material of the spring 4 and adopts titanium alloy material. The springs of conventional pressure valves are mostly made of stainless steel. The material parameter performance comparison table shown below clearly shows the performance of springs made of stainless steel and titanium alloy, specifically:

[0056]

[0057]

[0058] As can be seen from the above table, the tensile strength, yield strength, melting point, density and other properties of titanium alloy materials are significantly better than those of stainless steel. Titanium alloy has high strength, and its tensile strength is easily greater than 800MPa, and can reach up to 1400MPa. And titanium alloy is an alloy with unique shape memory function. Titanium alloy can automatically restore its original shape at a certain temperature, even if it has undergone plastic deformation. This characteristic is called shape memory effect, which is a manifestation of the memory of titanium alloy; therefore, this application uses titanium alloy to make spring 4, and uses the high melting point, high temperature resistance and deformation memory of titanium alloy to improve the service life of spring 4 under high-temperature steam pressure stamping. Further, because the service life of spring 4 increases, the deformation ability of spring 4 is guaranteed, so that the lifting effect of valve core 3 can be guaranteed, and the valve core 3 can be lifted after the steam pressure in the pot reaches the preset pressure, so that the valve core 3 can open the steam outlet 13, so as to carry out subsequent pressure relief, and the problem of unstable steam pressure of the valve body will not occur due to the deterioration of the deformation ability of spring 4.

[0059] Preferably, the apertures of the steam inlet 12 and the steam outlet 13 are 2.0-5.5 mm;

[0060] The aperture of the steam dissipation port 22 is 2.0-3.5 mm.

[0061] In one embodiment of the present application, the optimal apertures of the steam inlet 12 and the steam outlet 13 are 3.13 mm, and the optimal aperture of the steam dispersion port 22 is 2.51 mm.

[0062] In this embodiment, the aperture of the steam dispersion port 22 is smaller than the apertures of the steam inlet 12 and the steam outlet 13. Without exceeding the maximum aperture of the steam dispersion port 22, the aperture of the steam dispersion port 22 can be equal to the apertures of the steam inlet 12 and the steam outlet 13. Within this data range, the steam pressure can stamp the steam dispersion space 21, lift the valve core 3, and also slow down the speed at which the airflow diffuses outside the pot, so that the fragrance is retained longer.

[0063] Preferably, the total length of the spring 4 in the natural state is 6.6 mm, the wire diameter is 0.36 mm, and the number of effective turns of the spring body of the spring 4 is 5 turns.

[0064] The elastic coefficient of the spring 4 is related to the outer diameter, wire diameter, elastic modulus of the material, and effective number of turns of the spring 4. When the spring 4 has a total length of 6.6mm-11.5mm, a wire diameter of 0.36mm, and an effective number of turns of 5 turns in the natural state, when the gas pressure in the pot reaches about 30kpa, the gas generates a certain pressure on the valve core 3 through the steam outlet 13, and then compresses the spring 0.5mm-1.5mm, so that the valve core 3 is lifted and the steam is discharged.

[0065] Furthermore, in this example, an accommodating chamber 14 is formed by recessing one end of the valve column 1 toward the steam passage 11, and the wall of the accommodating chamber 14 is designed to be an inclined surface to match the conical surface structure of the cone 31 of the valve core 3, so that the cone 31 of the valve core 3 can be embedded in the accommodating chamber 14 and block the steam passage 11; at the same time, because the wall of the accommodating chamber 14 is inclined and the cone 31 of the valve core 3 has a taper, when the steam pressure pushes up the valve core 3, the steam will follow the conical surface and the inclined wall of the accommodating chamber 14 to enter the steam dispersion space 21 at a certain oblique angle. As the steam pressure continues to increase, the gap between the valve core 3 and the accommodating chamber 14 increases, more and more steam enters the steam dispersion space 21 and the oblique angle of entry becomes larger, and the steam begins to diffuse in four directions along the taper of the cone 31, forming an airflow in the steam outlet 13;

[0066] When the airflow from the steam outlet 13 enters the steam dispersion space 21 upward, due to the presence of the spring 4, the airflow forms a spiral cyclone under the spiral structure of the spring 4 and rises in the steam dispersion space 21; because the steam dispersion port 22 is arranged at the top of the steam dispersion space 21, the cyclone needs to continuously rise along the steam dispersion space 21 and can only release pressure to the outside after contacting the steam dispersion port 22 at the top, so to a certain extent, the time for the steam pressure to overflow is delayed, so that the steam pressure with fragrance can be retained longer; the steam dispersion ports of the existing valve body are located on both sides of the valve body, close to the steam outlet, and when the steam pressure comes out of the steam outlet, it immediately leaks out from the steam dispersion ports on both sides, and the fragrance cannot be retained;

[0067] Furthermore, because the existing steam dissipation ports of the valve body are located on both sides, the existing valve body rotates with the help of the steam pressure when the steam pressure leaks. Based on this principle, the present application cooperates with the spiral structure of the spring 4. When the steam pressure enters the steam dissipation space 21 from the steam outlet 13, a cyclone will be formed under the spiral structure and rise in the steam dissipation space 21. At the same time, because the steam dissipation port 22 is arranged at the top, the cyclone is forced to overflow only from the top. In addition, the existence of the spring 4 will occupy a part of the steam dissipation space 21, resulting in only a part of the cyclone overflowing from the steam dissipation port 22, and the other part of the cyclone that has not overflowed will touch the top and fall back. The falling cyclone will mix with the next wave of steam pressure and rise again and overflow, and so on, so that the cyclone goes back and forth in the steam dissipation space 21, so that the fragrance lasts longer.

[0068] Because the steam pressure is output intermittently, the valve core 3 is constantly lifted up, causing the steam outlet 13 to continuously have air pressure entering the steam dispersion space 21, and cooperate with the cyclone that touches the top and falls back to form a new cyclone along the spiral structure of the spring 4, which continuously goes back and forth in the steam dispersion space 21 and overflows from the steam dispersion port 22. Because of the existence of the valve core 3 and the spring 4, the airflow can form a cyclone and be dispersed from the steam dispersion port 22. Compared with the existing direct current dispersion, the cyclone dispersion can greatly slow down the diffusion speed of the airflow, so that the fragrance remains for a longer time, instead of a one-time large amount of instantaneous diffusion, resulting in the loss of fragrance;

[0069] Furthermore, the steam dissipation port 22 of this embodiment is arranged at the top of the valve cap 2, and there is only one. Compared with the existing situation that the steam dissipation port 22 is arranged on both sides of the valve cap 2 and there are multiple steam dissipation ports 22, a single steam dissipation port 22 can slow down the steam dissipation speed, so that the fragrance can be retained longer.

[0070] Preferably, the cone 31 includes a cone body portion 311 and a cone tip portion 312;

[0071] The conical surface corresponding to the conical tip 312 abuts against the wall surface corresponding to the lower part of the accommodating chamber 14, and the conical tip 312 is inserted into the steam passage 11;

[0072] A gap is formed between the conical surface corresponding to the conical body portion 311 and the wall surface corresponding to the upper portion of the accommodating cavity 14 .

[0073] In this embodiment, the cone tip 312 extends from the steam outlet 13 into the steam passage 11 to seal the steam passage 11 to prevent pressure leakage when the pressure in the pot is insufficient, thereby preventing food from being cooked.

[0074] Furthermore, the conical surface of the cone body 311 and the upper wall surface of the accommodating chamber 14 are not completely matched, but a certain gap is formed. From the cross-sectional view, an angle is formed between the straight lines where the two are located, and the intersection point of the angle is the contact point between the cone tip 312 and the steam outlet 13; the reason for this design is that after the cone tip 312 is lifted up, the steam pressure can enter the steam dispersion space 21 along the gap, and the entry angle is constantly increasing. With the cone surface of the cone tip 312 and the inclined wall surface of the accommodating chamber 14, 360-degree omnidirectional diffusion can be formed; if the inclination angle of the wall surface of the accommodating chamber 14 is designed to match the cone surface of the cone 31, the cone 31 needs to be completely lifted up and separated from the accommodating chamber 14 to successfully discharge steam, and at the same time, it will cause the steam output to be too small and a cyclone cannot be formed.

[0075] Preferably, the angle formed by the connecting lines of the cone surfaces on both sides of the vertical section of the cone tip 312 is 47°-88°.

[0076] In one embodiment of the present application, the angle formed by the connecting lines of the conical surfaces on both sides of the vertical section of the conical tip 312 is optimally 67°. Within this range, the steam pressure can form an airflow from the steam outlet 13 and lift the valve core 3.

[0077] Preferably, one end of the spring 4 is fixed to the mounting portion of the valve core 3 , and the other end is in contact with the steam diffusion port 22 .

[0078] In one embodiment of the present application, one end of the spring 4 is fixed to the mounting portion of the valve core 3, and the other end is abutted against the steam dispersion port 22. Under this design, the steam pressure will lift the valve core 3, causing the valve core 3 to squeeze the spring. When the steam pressure increases, the force of the valve core 3 squeezing the spring 4 will increase, and the valve core 3 will move away from the accommodating chamber 14. When the steam pressure decreases, the force of the valve core 3 squeezing the spring 4 will decrease. At the same time, due to the reaction force of the spring 4, the valve core 3 will move closer to the accommodating chamber 14. At the same time, because the spring 4 is abutted against the steam dispersion port 22, when the cyclone is about to overflow from the steam dispersion port 22, the spring will slow down the speed of the cyclone overflow, thereby retaining the fragrance for a longer time.

[0079] Furthermore, the spring 4 abuts against the steam dispersing port 22, which is equivalent to reducing the speed of the airflow dispersing from the steam dispersing port 22, thereby making the fragrance remain longer in disguise.

[0080] Preferably, Figure 3 and Figure 6 As shown, the mounting portion includes a clamping block 32 , one end of the spring 4 is inserted into the clamping block 32 , and the middle portion of the clamping block 32 protrudes outward in an annular direction to clamp the spring 4 .

[0081] In one embodiment of the present application, the connection method between the spring 4 and the valve core 3 can be: a clamping block 32 is designed at the installation part of the valve core 3, the spring 4 is inserted into the clamping block 32, and the middle annular protrusion of the clamping block 32 is used to clamp the main spring 4 to prevent the spring 4 from being separated from the valve core 3.

[0082] Preferably, Figure 5 and Figure 7 As shown, the mounting portion includes a cavity 33 with a built-in thread groove, and the thread at one end of the spring 4 cooperates with the thread groove and is screwed into the cavity 33.

[0083] In another embodiment of the present application, the connection method between the spring 4 and the valve core 3 can be: the mounting portion of the valve core 3 is designed to be a cavity 33, the cavity wall of the cavity 33 is provided with a threaded groove, and the threaded spring body of the spring 4 can be screwed into the cavity 33 along the threaded groove to complete the fixation of the spring 4 and the valve core 3.

[0084] A cooker comprises a cooker cover 5 and a cooker body 6 which cooperate with each other, wherein the cooker cover 5 is equipped with any one of the pressure valve body structures described above.

[0085] The cooker involved in the present application can be any cooker equipped with the above-mentioned pressure valve body structure, such as a pressure cooker, an electric rice cooker, a soup pot, etc.

[0086] The technical principle of the present invention is described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations herein, those skilled in the art can associate other specific implementations of the present invention without paying creative labor, and these methods will fall within the scope of protection of the present invention.

Claims

1. A pressure valve body structure, characterized in that: Including valve stem, valve cap and valve core; The valve column is provided with a steam passage that runs through both ends of the column body, and the steam passage is provided with a steam inlet and a steam outlet. One end of the valve column is recessed toward the steam passage to form a receiving cavity, and the bottom of the receiving cavity is connected to the steam outlet of the steam passage. A locking cavity for locking the accommodating cavity is arranged inside the valve bonnet, and a steam dissipation port communicating with the locking cavity is arranged on the top of the valve bonnet; The valve core is movably placed in the accommodating cavity and seals the steam passage; The valve core is provided with a spring, and the spring is made of titanium alloy.

2. A pressure valve body structure according to claim 1, characterized in that: The apertures of the steam inlet and outlet are 2.0-5.5 mm; The aperture of the steam dissipation port is 2.0-3.5 mm.

3. A pressure valve body structure according to claim 1, characterized in that: The total length of the spring in the natural state is 6.6mm-11.5mm, the wire diameter is 0.36mm, and the number of effective turns of the spring body is 5 turns.

4. A pressure valve body structure according to claim 1, characterized in that: The wall surface of the accommodating cavity is inclined relative to the steam passage; A steam dispersion space is reserved between the accommodating cavity and the steam dispersion port; The abutting portion of the valve core is provided with a cone, and the cone surface of the cone abuts against the wall surface of the accommodating cavity so that the cone is placed in the accommodating cavity and can movably seal the steam passage; The spring is installed on the mounting portion of the valve core; In the steam outlet state, the steam pressure enters the steam outlet channel and lifts the valve core to open the steam outlet channel so that the steam outlet channel is connected to the steam dispersion space. The steam pressure forms a spiral cyclone under the action of the spring. The spiral cyclone travels back and forth in the steam dispersion space and overflows from the steam dispersion port.

5. A pressure valve body structure according to claim 4, characterized in that: One end of the spring is fixed to the mounting portion of the valve core, and the other end is in contact with the steam diffusion port.

6. A pressure valve body structure according to claim 5, characterized in that: The mounting portion comprises a clamping block, one end of the spring is inserted into the clamping block, and the middle portion of the clamping block protrudes outward in an annular direction to clamp the spring.

7. A pressure valve body structure according to claim 5, characterized in that: The mounting portion comprises a cavity with a built-in thread groove, and the thread at one end of the spring cooperates with the thread groove and is screwed into the cavity.

8. The pressure valve body structure according to claim 1, characterized in that: The cone includes a cone body and a cone tip; The conical surface corresponding to the conical tip abuts against the wall surface corresponding to the lower part of the accommodating chamber, and the conical tip is inserted into the steam passage; A gap is formed between the conical surface corresponding to the conical body and the wall surface corresponding to the upper part of the accommodating cavity.

9. A pressure valve body structure according to claim 8, characterized in that: The angle formed by the connecting lines of the cone surfaces on both sides of the vertical section of the cone tip is 47°-88°.

10. A cooker, comprising a cooker cover and a cooker body used in conjunction with each other, characterized in that: The pot cover is equipped with any one of the pressure valve body structures described in claims 1-9.

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