Pressure detection device and pressure cooking utensil

Abstract

The utility model discloses a pressure detection device and a pressure cooking utensil, the pressure detection device comprises a shell and a detection piece fixed on the shell, the shell is provided with a communication cavity and a detection cavity, the communication cavity is communicated with a cooking cavity, the detection piece is located in the detection cavity, and a deformation piece is arranged between the detection cavity and the communication cavity. The deformation piece can deform under the action of the air pressure difference between the detection cavity and the communication cavity, the deformation piece comprises a body and a deformation part protruding towards the cooking cavity relative to the body, a wrinkle part is arranged between the deformation part and the body, and the wrinkle part can contract or expand so as to provide deformation allowance when the deformation part moves. When the deformation part is pushed by air pressure in the cooking cavity, the deformation part collapses and deforms towards the interior of the detection cavity instead of stretching deformation, so that the pressure difference, caused by stretching deformation, of the detection cavity and the communication cavity is eliminated, the deformation part can be more flexibly deformed under the pushing of the air pressure, the borne resistance is extremely small, and the detection accuracy of the detection piece is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of kitchen appliances, and particularly relates to a pressure detection device and a pressure cooking appliance. Background Art

[0002] The pressure detection device is one of the important components on the pressure cooking appliance, and is used to detect the air pressure inside the cooking appliance in real time and feed back to the control unit to ensure that the pressure cooking appliance operates in a safe air pressure environment.

[0003] The pressure detection device generally includes a housing and a detection member. The detection member extends into the housing. According to the connection relationship between the detection member and the cooking cavity, the pressure detection device can be divided into two types. One is that the detection member is directly connected to the cooking environment inside the pot to directly detect the air pressure inside the pot. The other is that a diaphragm is arranged inside the housing to divide the housing into two chambers. One chamber is connected to the cooking environment inside the pot, and the detection member is located in the other chamber to indirectly detect the air pressure in the cooking cavity through the deformation of the diaphragm.

[0004] The diaphragm is usually an elastic structure with a flat shape. When it deforms under the action of air pressure, it is stretched and undergoes tensile deformation, thereby generating a resilience force towards the cooking cavity. Its own resilience force will offset a part of the pushing force of the air pressure, reducing the deformation amount of the diaphragm, resulting in the air pressure measured by the detection member being less than the real air pressure in the cooking cavity, causing inaccurate detection by the detection member. As the air pressure in the cooking cavity continues to increase, the deformation amount of the diaphragm also continues to increase, and the resilience force becomes larger and larger, resulting in an increasing difference between the air pressure measured by the detection member and the real air pressure in the cooking cavity. Therefore, during the high-pressure cooking process, the pressure detection error of the detection member is relatively large. Summary of the Utility Model

[0005] The utility model provides a pressure detection device and a pressure cooking appliance to solve the problem that when the air pressure acts on the diaphragm component, the diaphragm undergoes tensile deformation, so that its own resilience force will offset a part of the pushing force of the air pressure, resulting in inaccurate pressure detection.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A pressure detection device includes a housing and a detection member fixed to the housing. The housing has a communication cavity and a detection cavity. The communication cavity is connected to the cooking cavity. The detection member is located in the detection cavity. A deformation member is arranged between the detection cavity and the communication cavity. The deformation member can deform under the action of the air pressure difference between the detection cavity and the communication cavity. The deformation member includes a body and a deformation part protruding towards the cooking cavity relative to the body. A fold part is arranged between the deformation part and the body. The fold part can contract or expand to provide a deformation margin when the deformation part moves.

[0008] The pressure detection device of the present utility model further has the following additional technical features:

[0009] The wrinkled part includes a wrinkled ring surrounding the outer periphery of the deformed part, and there are at least two wrinkled rings which are arranged at intervals along the radial direction of the deformable member.

[0010] The distance that the deformed part protrudes towards the cooking cavity is not less than 1 / 4 of the inner diameter of the deformable member.

[0011] The housing includes a valve seat and a valve body. The detection cavity is located in the valve seat, at least part of the communication cavity is located in the valve body, and the valve body and the valve seat clamp and fix the main body.

[0012] The main body has a mating protrusion, and the valve seat and / or the valve body are provided with a limiting groove, and the mating protrusion is located in the limiting groove.

[0013] At least part of the area of the deformed part is a spherical structure, so as to form a contact spherical surface on the side of the deformed part facing the cooking cavity.

[0014] The pressure detection device further includes a filter element arranged in the communication cavity. The filter element is provided with filter holes, so that the airflow in the cooking cavity passes through the filter holes and acts on the deformable member.

[0015] The housing includes a valve seat and a valve body detachably connected to the valve seat. The detection cavity is located in the valve seat, at least part of the communication cavity is located in the valve body, and the filter element and the valve body are of an integrally formed structure.

[0016] The housing includes a valve seat, a valve body and a fixing part. The detection cavity is located in the valve seat, the communication cavity is located in the valve body and the fixing part, and the filter element is arranged in the fixing part.

[0017] The present utility model also discloses a pressure cooking appliance, which includes a pot body having a cooking cavity and a pot lid covering the cooking cavity, and further includes the above-mentioned pressure detection device; the pot lid includes a lining lid and an inner lid, the pressure detection device is arranged on the lining lid or the inner lid, the communication cavity is communicated with the cooking cavity, and the deformable member isolates the detection cavity and the communication cavity.

[0018] Due to the adoption of the above technical solutions, the beneficial effects obtained by the present utility model are as follows:

[0019] 1. In the present utility model, the deformable member isolates the detection cavity and the communication cavity. The communication cavity is communicated with the cooking cavity and has the same air pressure as that in the cooking cavity. The detection member is located in the detection cavity. When the air pressure in the cooking cavity rises, under the action of the pressure difference on both sides, the deformable member deforms towards the detection cavity, so that the gas in the detection cavity is compressed, and the detection member obtains a pressure signal, and then the air pressure in the cooking cavity is indirectly detected by detecting the air pressure in the detection cavity.

[0020] In addition, the deformed part of the deformable member protrudes towards the cooking cavity, and a wrinkled part is provided between the deformed part and the body. When the deformed part is pushed by the air pressure in the cooking cavity, it collapses and deforms towards the detection cavity instead of stretching, thus eliminating the pressure difference between the detection cavity and the communication cavity caused by stretching. The wrinkled part can provide deformation allowance for the movement of the deformed part. When collapsing and deforming, the wrinkled part unfolds or contracts. Compared with the stretching deformation method, the resilience of the deformable member itself is greatly reduced, so it cannot better resist the pushing force of the air pressure on the deformed part, enabling the deformed part to deform more flexibly under the air pressure and with extremely small resistance. The gas in the detection cavity can change more accurately with the air pressure in the cooking cavity, and then the pressure value measured by the detection member is closer to the actual pressure in the cooking cavity, thereby improving the detection accuracy of the detection member.

[0021] 2. As a preferred embodiment of the present invention, the wrinkled part includes a wrinkled ring surrounding the outer periphery of the deformed part. There are at least two wrinkled rings and they are arranged at intervals along the radial direction of the deformable member. The wrinkled part is multiple and surrounds the deformed part. On the one hand, when the deformed part moves towards the detection cavity, the wrinkled rings on the outer peripheral side can deform uniformly, making the movement of the deformed part more stable and maintaining a good posture during movement, so that the whole deformable member deforms uniformly in each area and the detection by the detection member is more accurate. On the other hand, there are multiple wrinkled rings, which also increases the overall collapse deformation ability of the deformable member, enabling the deformable member to obtain a larger deformation amount in the way of collapse deformation. When the movement amount of the deformed part is small, the wrinkled ring closest to the deformed part deforms. As the movement amount of the deformed part increases, each wrinkled ring from the inside to the outside unfolds one by one to provide deformation allowance for the deformed part.

[0022] 3. As a preferred embodiment of the present invention, at least part of the area of the deformed part is a spherical structure to form a contact spherical surface on the side of the deformed part facing the cooking cavity. The setting of the contact spherical surface increases the contact area between the air flow and the deformed part, so that the air flow can form a uniform thrust on each area of the deformed part under the action of air pressure, making the deformed part deform uniformly. And, under the same pressure change, the deformed part with a spherical structure has a larger compressed volume, which helps to improve the detection accuracy of the detection member.

[0023] 4. As a preferred embodiment of the present invention, the body has a mating protrusion, and the valve seat and / or the valve body are provided with limiting grooves, and the mating protrusion is located in the limiting grooves. The valve body and the valve seat fix the deformable member by clamping, and the mating protrusion of the deformable member cooperates with the limiting grooves of the valve body and / or the valve seat to form a limit. On the one hand, it can play a positioning role in the installation of the deformable member. By the cooperation of the mating protrusion and the limiting groove, the position of the deformable member is relatively fixed, thus ensuring the reliability of deformation. On the other hand, it can play a limiting role on the deformable member to prevent the deformable member from slipping out between the valve seat and the valve body when undergoing a large degree of deformation.

[0024] 5. As a preferred embodiment of the present utility model, the pressure detection device further includes a filter element disposed in the communication cavity. The filter element is provided with filter holes, so that the airflow in the cooking cavity passes through the filter holes and acts on the deformable member. After the gas in the cooking cavity carries bubbles, liquid and food residues and surges into the communication cavity, the filter element can block large particles of food residues and liquid, so that they collide with the blocking portion and then fall back into the cooking cavity under the action of gravity, while the gas can continue to surge through the filter holes. At the same time, the filter holes can also play a certain role in bursting bubbles. When the bubbles pass through the filter holes, they are squeezed by the inner wall of the filter holes, which helps the bubbles to burst, and then the liquid and gas in the bubbles are separated, and the liquid falls back. In this way, the cleanliness of the deformable member is ensured, which not only reduces the cleaning pressure of the user, but also enables the detection member to maintain a high detection accuracy.

[0025] In addition, the filter holes can also play a role in diverting the airflow, so that the airflow converging in the communication cavity passes through the filter element more dispersedly and acts on the deformable member. On the one hand, this makes the contact between the gas and the deformable member more uniform, helps the deformable member to be uniformly stressed in each area and thus undergo uniform deformation, improving the accuracy of the data collected by the detection member. On the other hand, it can appropriately reduce the impact force of the gas, thereby reducing the risk of damage to the deformable member caused by a large impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings described herein are used to provide a further understanding of the present utility model and constitute a part of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0027] Figure 1 is a cross-sectional view of the pressure detection device under an embodiment of the present utility model;

[0028] Figure 2 is a cross-sectional view of the deformable member under an embodiment of the present utility model;

[0029] Figure 3 is Figure 2 a cross-sectional view of the deformable member in another perspective in ;

[0030] Figure 4 is Figure 1 a cross-sectional view of the valve body in ;

[0031] Figure 5 is a cross-sectional view of the pressure detection device under another embodiment of the present utility model;

[0032] Figure 6 is Figure 5 a cross-sectional view of the deformable member in ;

[0033] Figure 7 For Figure 5 Cross-sectional view of the fixing part;

[0034] Figure 8 Cross-sectional view of the pot lid under an embodiment of the present utility model.

[0035] Wherein:

[0036] 1 Housing; 11 Valve seat; 12 Valve body; 121 Limit groove; 13 Fixing part; 131 Sealing ring; 14 Communication cavity; 15 Detection cavity;

[0037] 2 Detection member;

[0038] 3 Deformation member; 31 Deformation part; 32 Folding part; 321 Folding ring; 33 Body; 331 Fitting protrusion;

[0039] 4 Filter member; 41 Filter hole;

[0040] 5 Pot lid; 51 Liner lid; 52 Inner lid. Specific embodiments

[0041] In order to more clearly illustrate the overall concept of the present utility model, the following will be described in detail by way of examples in conjunction with the accompanying drawings of the specification.

[0042] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present utility model is not limited by the specific embodiments disclosed below.

[0043] In addition, in the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0044] In the present utility model, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection, an electrical connection, or a communication; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0045] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to terms such as "embodiment", "example", "an embodiment", "example" or "specific example" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expression of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0046] As Figure 1 shown, a pressure detection device includes a housing 1 and a detection member 2 fixed to the housing 1. The housing 1 has a communication cavity 14 and a detection cavity 15. The communication cavity 14 is in communication with a cooking cavity. The detection member 2 is located in the detection cavity 15. A deformation member 3 is provided between the detection cavity 15 and the communication cavity 14. The deformation member 3 can deform under the action of the air pressure difference between the detection cavity 15 and the communication cavity 14. The deformation member 3 includes a main body 33 and a deformation portion 31 protruding towards the cooking cavity relative to the main body 33. A corrugated portion 32 is provided between the deformation portion 31 and the main body 33. The corrugated portion 32 can contract or expand to provide a deformation margin when the deformation portion 31 moves.

[0047] In the present utility model, the deformation member 3 isolates the detection cavity 15 and the communication cavity 14. The communication cavity 14 is in communication with the cooking cavity and has the same air pressure as that in the cooking cavity. The detection member 2 is located in the detection cavity 15. When the air pressure in the cooking cavity rises, under the action of the pressure difference on both sides, the deformation member 3 deforms towards the detection cavity 15, and then the gas in the detection cavity 15 is compressed. The detection member 2 obtains a pressure signal, and then indirectly detects the air pressure in the cooking cavity by detecting the air pressure in the detection cavity 15.

[0048] In addition, the deformed part 31 of the deformable member 3 protrudes toward the cooking cavity, and a pleated part 32 is provided between the deformed part 31 and the main body 33. When the deformed part 31 is pushed by the air pressure in the cooking cavity, it collapses and deforms toward the detection cavity 15 instead of stretching, thereby eliminating the pressure difference between the detection cavity 15 and the communication cavity 14 caused by stretching. The pleated part 32 can provide a deformation margin for the movement of the deformed part 31. During the collapse deformation, the pleated part 32 unfolds or contracts. Compared with the stretching deformation method, the resilience of the deformable member 3 itself is greatly reduced, so that it cannot better resist the pushing force of the air pressure on the deformed part 31, enabling the deformed part 31 to deform more flexibly under the push of the air pressure and with extremely small resistance. This allows the gas in the detection cavity 15 to change more accurately with the change of the air pressure in the cooking cavity, and further makes the pressure value measured by the detector 2 closer to the actual pressure in the cooking cavity, thereby improving the detection accuracy of the detector 2.

[0049] It can be understood that the communication cavity 14 is connected to the cooking cavity, so the air pressure in the communication cavity 14 is the same as that in the cooking cavity. As Figure 1 shown, in the state where the deformable member 3 is not deformed, the deformed part 31 of the deformable member 3 protrudes toward the cooking cavity, and a pleated part 32 is provided on the outside. When the air pressure in the cooking cavity increases, the air pressure pushes the deformed part 31 to move toward the detection cavity 15, and the deformable member 3 collapses and deforms under the action of the pleated part 32. The ratio of the volume of the detection cavity 15 where the detector 2 is located to the collapsed volume of the deformable member 3 can be calculated in advance through the ideal gas state equation pV = nRT to reduce the resilience generated by the stretching deformation of the deformable member 3 and make the pressure in the detection cavity 15 as consistent as possible with the air pressure in the cooking cavity, that is, the communication cavity 14.

[0050] Preferably, the pleated part 32 can be formed by stacking in a wave shape or a zigzag shape.

[0051] It should be noted that the present invention does not limit the state of the pleated part 32 in the initial state, that is, the state when the deformable member 3 is not deformed by the push of the air pressure. It can be one of the following embodiments:

[0052] Embodiment 1: In this embodiment, in the initial state, the pleated part 32 is in a contracted state. When the deformed part 31 is pushed by the air pressure in the communication cavity 14, the deformed part 31 moves toward the detection cavity 15, and then the pleated part 32 unfolds, and the whole deformable member 3 collapses and deforms.

[0053] Embodiment 2: In this embodiment, in the initial state, the pleated part 32 is in a state of at least partial unfolding. When the deformed part 31 is pushed by the air pressure in the communication cavity 14 and moves toward the detection cavity 15, the pleated part 32 first contracts, and then as the movement amount of the deformed part 31 gradually increases, the pleated part 32 gradually unfolds, causing the whole deformable member 3 to collapse and deform.

[0054] As a preferred embodiment of the present utility model, as shown in Figure 2 , Figure 3 shown, the wrinkled portion 32 includes a wrinkled ring 321 surrounding the outer periphery of the deformed portion 31, and there are at least two wrinkled rings 321 which are arranged at intervals along the radial direction of the deformable member 3.

[0055] Specifically, as shown in Figure 3 shown, the deformed portion 31 is located in the central region of the deformable member 3 and at the center of the communication cavity 14 and the detection cavity 15, and can be directly pushed by air pressure to move. The wrinkled portion 32 surrounds the outer periphery of the deformed portion 31 and is located between the communication cavity 14 and the detection cavity 15. The body 33 surrounds the outside of the wrinkled portion 32 and is used for fixing the deformable member 3 to the housing 1.

[0056] There are multiple wrinkled portions 32 surrounding the deformed portion 31. On the one hand, when the deformed portion 31 moves towards the detection cavity 15, the wrinkled rings 321 on the outer peripheral side can deform uniformly, so that the movement of the deformed portion 31 is more stable, and a good posture can be maintained during movement, so that the entire deformable member 3 deforms uniformly in each area, making the detection by the detection member 2 more accurate. On the other hand, there are multiple wrinkled rings 321, which also increases the overall collapsible deformation ability of the deformable member 3, enabling the deformable member 3 to obtain a larger deformation amount in a collapsible deformation manner. When the movement amount of the deformed portion 31 is small, the wrinkled ring 321 closest to the deformed portion 31 deforms. As the movement amount of the deformed portion 31 increases, the wrinkled rings 321 from the inside to the outside are unfolded one by one to provide deformation allowance for the deformed portion 31.

[0057] Of course, the wrinkled portion 32 can also be of other structures or arranged at other positions of the deformed portion 31, as long as the deformed portion 31 can drive the wrinkled portion 32 to deform when moving.

[0058] Preferably, as shown in Figure 2 shown, the distance H that the deformed portion 31 protrudes towards the cooking cavity is not less than 1 / 4 of the inner diameter D of the deformable member 3. So that the deformable member 3 has a sufficiently large volume for collapsible deformation, and the deformation amount of the collapsible deformation of the deformable member 3 is ensured, and as much as possible, the deformable member 3 undergoes more collapsible deformation and reduces the possibility of tensile deformation, thereby ensuring the detection accuracy of the detection member 2.

[0059] Specifically, as shown in Figure 2 shown, the wrinkled portion 32 and the deformed portion 31 are structures protruding towards the communication cavity 14 relative to the body 33. Therefore, the inner diameter of the deformable member 3 is the inner diameter of the body 33, and the distance that the deformed portion 31 protrudes towards the cooking cavity is the vertical distance between the lower edge of the body 33 (excluding the part with the mating protrusion 331) and the lower edge of the deformed portion 31.

[0060] Furthermore, as shown inFigure 1 , Figure 5 As shown in Figure 5 , the corrugated portion 32 is also a structure protruding into the communication cavity 14, so as to increase the protruding distance of the deformation portion 31.

[0061] In a preferred embodiment, as Figure 1 , Figure 5 shown, the housing 1 includes a valve seat 11 and a valve body 12. The detection cavity 15 is located in the valve seat 11, and at least a part of the communication cavity 14 is located in the valve body 12. The valve body 12 and the valve seat 11 clamp and fix the main body 33. By clamping and fixing the deformable member 3 through the valve seat 11 and the valve body 12, the assembly of the deformable member 3 is made simpler and more convenient. Preferably, the deformable member 3 is a thin film structure so that it can be more easily deformed by the air pressure.

[0062] Preferably, as Figure 1 , Figure 5 shown, the valve seat 11 and / or the valve body 12 are provided with limiting grooves 121, and the main body 33 is provided with fitting protrusions 331, and the fitting protrusions 331 are located in the limiting grooves 121.

[0063] The valve body 12 and the valve seat 11 fix the deformable member 3 by clamping, and the fitting protrusions 331 of the deformable member 3 cooperate with the limiting grooves 121 of the valve body 12 and / or the valve seat 11 to form a limit. On the one hand, it can play a positioning role in the installation of the deformable member 3. By the cooperation of the fitting protrusions 331 and the limiting grooves 121, the position of the deformable member 3 is relatively fixed, thus ensuring the reliability of the deformation. On the other hand, it can play a limiting role on the deformable member 3 to prevent the deformable member 3 from slipping off between the valve seat 11 and the valve body 12 when undergoing a large degree of deformation.

[0064] Specifically, as Figures 1 to 3 shown, the fitting protrusion 331 protrudes towards the valve body 12, and the valve body 12 is correspondingly provided with a limiting groove 121 that cooperates with the fitting protrusion 331. Of course, the fitting protrusion 331 can also protrude upwards, and the limiting groove 121 is correspondingly provided in the valve seat 11. Or the main body 33 is provided with an upwardly protruding fitting protrusion 331 and a downwardly protruding fitting protrusion 331, and both the valve seat 11 and the valve body 12 are provided with limiting grooves 121 to cooperate with the fitting protrusions 331.

[0065] Furthermore, the valve body 12 and the valve seat 11 are detachably connected to facilitate removing the valve body 12, the valve seat 11, and the deformable member 3 for separate cleaning to ensure the cleanliness inside the housing 1. Specifically, as Figure 1 , Figure 5 shown, the valve body 12 and the valve seat 11 are threadedly connected. Of course, the two can also be detachably connected by other means, such as snap connection, screw connection, etc., which are not limited herein. As Figure 1 , Figure 5As shown, the housing 1 further includes a fixing portion 13, which is fixed to the valve body 12. The fixing portion 13 and the valve body 12 together form a communication cavity 14. In one embodiment, the fixing portion 13 is a fixing nut, which is fixed to the valve body 12 by threaded connection, and a sealing ring 131 is provided at the connection between the fixing portion 13 and the valve body 12.

[0066] As a preferred embodiment of the present utility model, as Figure 5 , Figure 6 shown, at least a partial area of the deformation portion 31 is a spherical structure, so as to form a contact spherical surface on the side of the deformation portion 31 facing the cooking cavity.

[0067] The setting of the contact spherical surface increases the contact area between the air flow and the deformation portion 31, so that the air flow can form a uniform thrust on each area of the deformation portion 31 under the action of air pressure, thereby enabling the deformation portion 31 to deform uniformly. Moreover, under the same pressure change, the deformation portion 31 with a spherical structure has a larger compressed volume, which helps to improve the detection accuracy of the detection member 2.

[0068] In one embodiment, as Figure 5 , Figure 6 shown, the deformation portion 31 protrudes integrally into the communication cavity 14 to form a sphere. When the air pressure in the communication cavity 14 rises, the air flow not only forms a pushing force on the bottom of the deformation portion 31, but also can contact the side portion of the deformation portion 31 and squeeze the deformation portion 31 inward, so that the deformation of the deformation portion 31 is more uniform.

[0069] Of course, the deformation portion 31 can also be of other shapes. For example, the deformation portion 31 is a planar structure, or a concave surface structure protruding into the detection cavity 15, etc., which is not limited herein.

[0070] As a preferred embodiment of the present utility model, as Figure 1 , Figure 5 shown, the pressure detection device further includes a filter member 4 disposed in the communication cavity 14. The filter member 4 is provided with filter holes 41, so that the air flow in the cooking cavity passes through the filter holes 41 and acts on the deformation member 3.

[0071] After the gas in the cooking cavity carries bubbles, liquid and food residues and surges into the communication cavity 14, the filter member 4 can block large particles of food residues and liquid, so that they collide with the blocking portion and then fall back into the cooking cavity under the action of gravity, while the gas can continue to surge through the filter holes 41. At the same time, the filter holes 41 can also play a certain role in bursting bubbles. When the bubbles pass through the filter holes 41, they are squeezed by the inner wall of the filter holes 41, which helps the bubbles to burst, and then the liquid and gas in the bubbles are separated and the liquid falls back. In this way, the cleanliness of the deformation member 3 is ensured, which not only reduces the cleaning pressure of the user, but also enables the detection member 2 to maintain a high detection accuracy.

[0072] In addition, the filtering holes 41 can also divert the airflow, making the airflow converged in the communication cavity 14 pass through the filter element 4 more dispersedly, and acting on the deformable member 3. As a result, on the one hand, the contact between the gas and the deformable member 3 is more uniform, which helps the deformable member 3 to be uniformly stressed in each area and thus undergo uniform deformation, improving the accuracy of the data collected by the detection member 2. On the other hand, it can appropriately reduce the impact force of the gas, thereby reducing the risk of damage to the deformable member 3 caused by a large impact.

[0073] Preferably, the filter element 4 is detachably fixed to the housing 1. Specifically, in one embodiment, as Figure 1 、 Figure 4 shown, the housing 1 includes a valve seat 11 and a valve body 12 detachably connected to the valve seat 11. The detection cavity 15 is located in the valve seat 11, and at least part of the communication cavity 14 is located in the valve body 12. The filter element 4 and the valve body 12 are integrally formed structures.

[0074] At least part of the communication cavity 14 is located in the valve body 12, and the valve body 12 is detachably connected to the valve seat 11, enabling the user to remove the valve body 12. At this time, the communication cavity 14 is opened, and the user can clean the inside of the valve body 12 and the communication cavity 14, thereby ensuring the cleanliness of the communication cavity 14. At the same time, the user's operation is relatively simple and convenient. In addition, the valve body 12 and the filter element 4 are integrally formed, that is, the filter element 4 can be removed from the valve seat 11 together with the valve body 12, and then the filter element 4 can be cleaned together. When assembling after cleaning, assembling the valve body 12 and the valve seat 11 synchronously completes the installation of the filter element 4 without the need to install the filter element 4 separately, thereby ensuring the position stability of the filter element 4 and thus ensuring the filtering effect.

[0075] In another embodiment, as Figure 5 、 Figure 7 shown, the housing 1 includes a valve seat 11, a valve body 12 and a fixing part 13. The detection cavity 15 is located in the valve seat 11, the communication cavity 14 is located in the valve body 12 and the fixing part 13, and the filter element 4 is arranged on the fixing part 13.

[0076] The filter element 4 and the fixing part 13 are integrally formed so that the user can remove the filter element 4 together by removing the fixing part 13 for cleaning.

[0077] In yet another embodiment, the filter element 4 is an independent structure relative to the housing 1 so that the filter element 4 can be removed separately for cleaning. Specifically, the filter element 4 can be arranged between the valve seat 11 and the valve body 12 and clamped and fixed by the valve seat 11 and the valve body 12, or the filter element can be arranged between the valve body 12 and the fixing part 13 and clamped and fixed by the valve body 12 and the fixing part 13.

[0078] The present utility model also discloses a pressure cooking appliance, which includes a pot body having a cooking cavity and a pot lid 5 covering the cooking cavity, and further includes the above-mentioned pressure detection device; the pot lid 5 includes a lining lid 51 and an inner lid 52, the pressure detection device is arranged on the lining lid 51 or the inner lid 52, the communication cavity 14 is communicated with the cooking cavity, and the deformation member 3 isolates the detection cavity 15 and the communication cavity 14.

[0079] Specifically, as Figure 8 shown, the inner lid 52 is provided with an installation opening, the housing 1 passes through the installation opening, the housing 1 includes a valve body 12, a valve seat 11 and a fixing portion 13, the fixing portion 13 is located below the inner lid 52, the valve body 12 is located above the inner lid 52, and the two clamp the inner lid 52.

[0080] Preferably, the pressure detection device is electrically connected to the control unit of the cooking appliance, so that the control unit adjusts the control program of the pressure cooking appliance according to the detection signal of the pressure detection device. For example, when the pressure detection device measures that the air pressure in the cooking cavity reaches or exceeds the set value, it sends a signal to the control unit, and the control unit can control the heating device to stop heating, or control the pressure relief valve to open, so as to maintain the pressure in the pot at the current value for pressure holding or pressure relief.

[0081] In the present utility model, the parts not described can be realized by adopting or referring to the existing technologies.

[0082] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other. The key point of each embodiment is to illustrate the differences from other embodiments.

[0083] The above are only the embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, various changes and modifications can be made to the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the scope of the claims of the present utility model.

Claims

1. A pressure detection device, comprising a shell and a detection member fixed to the shell, wherein the shell has a connecting cavity and a detection cavity, the connecting cavity is connected to a cooking cavity, the detection member is located in the detection cavity, a deformable member is provided between the detection cavity and the connecting cavity, the deformable member can be deformed under the action of the air pressure difference between the detection cavity and the connecting cavity, and is characterized in that: The deformation member includes a body and a deformation portion protruding toward the cooking cavity relative to the body, a fold portion is provided between the deformation portion and the body, and the fold portion can be contracted or expanded to provide a deformation margin when the deformation portion moves.

2. The pressure detection device according to claim 1, characterized in that: The folded portion includes a folded ring surrounding the outer circumference of the deformation portion, and the folded rings are at least two and are spaced apart in the radial direction of the deformation member.

3. The pressure detection device according to claim 1, characterized in that: The distance that the deformation portion protrudes toward the cooking cavity is not less than 1 / 4 of the inner diameter of the deformation member.

4. The pressure detection device according to claim 1, characterized in that: The housing comprises a valve seat and a valve body, the detection cavity is located on the valve seat, at least a part of the communicating cavity is located on the valve body, and the valve body and the valve seat clamp and fix the main body.

5. The pressure detection device according to claim 4, characterized in that: The main body has a matching protrusion, and the valve seat and / or the valve body are provided with a limiting groove, and the matching protrusion is located in the limiting groove.

6. The pressure detection device according to claim 1, characterized in that: At least a partial area of ​​the deformation portion is a spherical structure, so as to form a contact spherical surface on a side of the deformation portion facing the cooking cavity.

7. The pressure detection device according to claim 1, characterized in that: The pressure detection device further comprises a filter element arranged in the communication cavity, wherein the filter element is provided with filter holes so that the airflow in the cooking cavity passes through the filter holes to act on the deformable element.

8. The pressure detection device according to claim 7, characterized in that: The housing comprises a valve seat and a valve body detachably connected to the valve seat, the detection cavity is located on the valve seat, at least a portion of the communicating cavity is located on the valve body, and the filter element and the valve body are an integrally formed structure.

9. The pressure detection device according to claim 7, characterized in that: The housing comprises a valve seat, a valve body and a fixing portion, the detection chamber is located at the valve seat, the communication chamber is located at the valve body and the fixing portion, and the filter element is arranged at the fixing portion.

10. A pressure cooking device, comprising a pot body having a cooking cavity and a pot cover covering the cooking cavity, characterized in that: It also includes the pressure detection device according to any one of claims 1 to 9; the pot cover includes a lining cover and an inner cover, the pressure detection device is arranged on the lining cover or the inner cover, the connecting cavity is connected to the cooking cavity, and the deformable part isolates the detection cavity from the connecting cavity.

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