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 detection piece comprises a detection probe, the shell is provided with a communication cavity, the communication cavity is communicated with a cooking cavity, and the detection probe detects the air pressure in the cooking cavity through the communication cavity. The pressure detection device further comprises a sealing piece arranged on at least partial area of the outer side of the detection probe in a sleeving mode, the sealing piece is provided with a first sealing part surrounding the side portion of the detection probe and a second sealing part protruding inwards from the first sealing part, the second sealing part abuts against the lower end of the detection probe, and a through hole is defined by the second sealing part. The width of the through hole is smaller than that of the detection probe. The second sealing part can form an upward stop with the detection probe, and when the sealing element is pushed by the air pressure of the inner cavity of the shell, the second sealing part tightly abuts against the detection probe, so that the contact between the sealing element and the detection probe is tighter, and the sealing performance between the detection probe and the sealing element 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, which is used to detect the air pressure inside the cooking appliance in real time and feedback 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 probe. The detection probe extends into the housing and is directly communicated with the cooking environment inside the pot to directly detect the air pressure inside the pot. Or by arranging a diaphragm inside the housing to divide the housing into two chambers, one of which is communicated with the cooking environment inside the pot, and the detection probe is located in the other chamber to indirectly detect the air pressure in the cooking chamber through the deformation of the diaphragm.

[0004] However, whether directly detecting or indirectly detecting the air pressure, a sealing sleeve needs to be sleeved on the outer peripheral side of the detection probe of the pressure sensor to ensure the sealing performance at the installation position of the detection probe and avoid air leakage, which may affect the detection accuracy. However, the lower end of the sealing sleeve is generally open to enable the detection probe to communicate with the internal chamber of the housing for facilitating the detection of air pressure. During specific use, when the air pressure inside the pot increases, the gas entering the sealing sleeve from the opening will push the sealing sleeve to deform and swing outwards, and then will be separated from the outer peripheral side of the detection probe. In this way, not only is it easy to reduce or even fail the sealing performance between the sealing sleeve and the detection probe, but also the detection probe will have detection errors. Moreover, as the pressure inside the pot becomes greater and greater, the deformation amount of the sealing sleeve will also become larger and larger, which will further exacerbate the air leakage phenomenon and detection errors. Summary of the Utility Model

[0005] The utility model provides a pressure detection device and a pressure cooking appliance to solve the problem that during the pressure cooking process, especially during high-pressure cooking, the high pressure acts on the sealing sleeve outside the pressure probe, causing the sealing of the sealing sleeve to deform, resulting in a decrease or even failure of its sealing performance with the detection probe, seriously affecting the accuracy of 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 detection member includes a detection probe. The housing has a communication cavity that communicates with a cooking cavity. The detection probe detects the air pressure in the cooking cavity through the communication cavity. The pressure detection device further includes a seal member sleeved on at least a partial area outside the detection probe. The seal member has a first sealing portion surrounding the side portion of the detection probe and a second sealing portion protruding inward from the first sealing portion. The second sealing portion abuts against the lower end of the detection probe. The second sealing portion encloses a through hole, and the width of the through hole is smaller than the width of the detection probe.

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

[0009] The seal member has a fitting channel for the detection probe to extend into. The inner wall of the fitting channel is provided with a sealing lip protruding toward the inside of the fitting channel, and the sealing lip abuts against the detection probe.

[0010] The housing has an installation channel for the detection probe to extend into. A limiting rib is provided on the outer peripheral side of the seal member, and a fitting rib is provided on the inner wall of the installation channel. The fitting rib can be in a blocking fit with the limiting rib to limit the deformation of the limiting rib.

[0011] The installation channel extends toward the inside of the housing to have a first installation end close to the communication cavity and a second installation end far from the communication cavity. The fitting rib is located on the side of the limiting rib facing the second installation end, and the projection of the limiting rib along the axial direction of the installation channel covers the fitting rib.

[0012] The second installation end is provided with an insertion opening, and the edge of the insertion opening protrudes inward to form the fitting rib.

[0013] The limiting rib includes a first limiting rib and a second limiting rib arranged at intervals along the axial direction of the detection probe. A limiting groove is formed between the first limiting rib and the second limiting rib, and the fitting rib is located in the limiting groove so that the first limiting rib and the second limiting rib are respectively located on both sides of the fitting rib.

[0014] The housing further has a detection cavity. The detection probe communicates with the detection cavity. A deformation member is provided 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 detection probe is used to detect the air pressure in the detection cavity.

[0015] The housing includes a valve seat and a valve body. The detection probe and the detection cavity are located on the valve seat, the communication cavity is located on the valve body, and the valve seat and the valve body clamp and fix the deformation member.

[0016] The detection member further includes a body. The seal member is sleeved on the detection probe, and there is an avoidance gap between the seal member and the body.

[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, and the communication cavity is communicated with the cooking cavity.

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

[0019] 1. In the present utility model, the detection probe of the detection piece extends into the interior of the housing to directly or indirectly detect the air pressure in the cooking cavity through the communication cavity inside the housing. The sealing member is sleeved outside the detection probe to form a seal for the detection probe. Among them, the second sealing portion is located below the detection probe and abuts against the lower end of the detection probe, so that the second sealing portion can form an upward stop with the detection probe. When the sealing member is pushed by the air pressure in the inner cavity of the housing, the second sealing portion tightly abuts against the detection probe, which not only forms a movement limit for the sealing member towards the outside of the housing to prevent the sealing member from moving and affecting the seal, but also makes the contact between the sealing member and the detection probe closer, improving the sealing performance between the detection probe and the sealing member. At the same time, the higher the air pressure in the communication cavity, the closer the second sealing portion abuts against the detection probe, and the better the sealing effect, thereby further ensuring the reliability and detection accuracy of the pressure detection device during the high-pressure cooking process.

[0020] 2. As a preferred embodiment of the present utility model, a sealing member is sleeved outside the detection probe, a limiting rib is arranged on the outer peripheral side of the sealing member, and a matching rib protruding towards the inside of the installation channel is arranged on the inner wall of the installation channel, so that the limiting rib and the matching rib are arranged along the axial direction of the installation channel, and the matching rib is located outside the installation channel relative to the limiting rib, so that the limiting rib can not only form a radial abutting seal with the inner wall of the installation channel, but also form an abutment with the matching rib along the axial direction of the installation channel. In this way, when the air pressure in the pot rises, even if the limiting rib has a tendency to swing towards the entrance and exit of the installation channel, due to the stop of the matching rib, the two will tightly abut, thereby ensuring the sealing performance between the detection probe and the inner wall of the installation channel and ensuring the detection accuracy of the detection probe. At the same time, the higher the air pressure in the communication cavity, the closer the limiting rib abuts against the matching rib, and the better the sealing effect, thereby further ensuring the reliability and detection accuracy of the pressure detection device during the high-pressure cooking process.

[0021] 3. As a preferred embodiment of the present utility model, the second mounting end is provided with an insertion opening, and the edge of the insertion opening protrudes inward to form a mating rib. The mating rib is located at the edge of the insertion opening. During assembly, the assembler can visually see the relative positional relationship between the mating rib and the limiting rib. When the limiting rib is completely inserted into the installation channel and is located below the mating rib, it indicates that the assembly is in place. Thus, it can give the assembler a more obvious and intuitive prompt without observing the inside of the installation channel, thereby reducing the assembly difficulty and improving the assembly efficiency.

[0022] 4. As a preferred embodiment of the present utility model, the limiting rib includes a first limiting rib and a second limiting rib that are spaced apart along the axial direction of the detection probe. A limiting groove is formed between the first limiting rib and the second limiting rib, and the mating rib is located in the limiting groove, so that the first limiting rib and the second limiting rib are respectively located on both sides of the mating rib. The first limiting rib and the second limiting rib are respectively located on the upper and lower sides of the mating rib. Thus, it can not only form a one-way limit on the sealing member along the axial direction of the installation channel outward, but also form a limit in both axial directions, thereby on the one hand ensuring the position reliability of the sealing member, and on the other hand making the abutment between the first limiting rib, the second limiting rib and the mating rib more reliable, and maintaining good sealing performance during both low-pressure and high-pressure cooking processes.

[0023] 5. As a preferred embodiment of the present utility model, the housing further has a detection cavity, the detection probe is communicated with the detection cavity, and a deformation member is arranged between the detection cavity and the communication cavity. The deformation member can deform under the action of the pressure difference between the detection cavity and the communication cavity, and the detection probe is used to detect the air pressure in the detection cavity. In this embodiment, the detection probe detects the air pressure in the cooking cavity by an indirect detection method. Specifically, the communication cavity is communicated with the cooking cavity and has the same air pressure as that in the cooking cavity, and the communication cavity and the detection cavity are isolated by the deformation member. When the air pressure in the pot increases, there is a pressure difference on both sides of the deformation member, and the deformation member deforms under the action of the pressure difference and protrudes toward the detection cavity. At this time, the air pressure and volume in the detection cavity change, and then the detection probe detects a pressure signal, so as to be able to detect the air pressure in the cooking cavity by an indirect detection method. The detection probe is not directly communicated with the cooking cavity, so that the steam, food soup, bubbles, etc. in the cooking cavity will not directly contact the detection probe, thereby being able to keep the detection probe clean, thus improving the detection sensitivity and accuracy, and improving the reliability and service life of the detection probe. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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:

[0025] Figure 1A cross-sectional view of a pressure detection device according to an embodiment of the present utility model, wherein the deformable member is in an undeformed state;

[0026] Figure 2 is Figure 1 a cross-sectional view of the pressure detection device in a deformed state of the deformable member;

[0027] Figure 3 a cross-sectional view of a partial area of a pressure detection device according to an embodiment of the present utility model;

[0028] Figure 4 a cross-sectional view of a seal according to an embodiment of the present utility model;

[0029] Figure 5 a schematic diagram of the internal structure of a valve body according to an embodiment of the present utility model;

[0030] Figure 6 an exploded view of the structure of a pressure detection device according to an embodiment of the present utility model;

[0031] Figure 7 a cross-sectional view of a pot lid according to an embodiment of the present utility model.

[0032] Wherein:

[0033] 1 housing; 11 valve seat; 12 valve body; 13 fixing part; 131 sealing ring; 14 communication cavity; 15 detection cavity; 16 installation channel; 161 mating rib; 162 first installation end; 163 second installation end;

[0034] 2 detection member; 21 detection probe; 22 body; 23 avoidance gap;

[0035] 3 deformable member;

[0036] 4 seal; 41 limiting rib; 411 first limiting rib; 412 second limiting rib; 413 limiting groove; 42 through hole; 43 mating channel; 44 sealing lip; 45 first sealing part; 46 second sealing part;

[0037] 5 filter member; 51 filter hole;

[0038] 6 cover body;

[0039] 7 pot lid; 71 lining cover; 72 inner cover. Specific embodiments

[0040] 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.

[0041] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. However, the present utility model may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present utility model is not limited by the specific embodiments disclosed below.

[0042] In addition, in the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "top", "bottom", "inner", "outer", "axial direction", "radial direction", "circumferential direction", etc. is based on the orientation or positional relationship shown in the drawings. It is 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. Therefore, it should not be construed as a limitation to the present utility model.

[0043] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or a communication connection; it may be directly connected, or indirectly connected through an intermediate medium. It may 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.

[0044] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may be 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", "a kind of 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 representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0045] As Figures 1 to 4 shown, a pressure detection device includes a housing 1 and a detection member 2 fixed to the housing 1. The detection member 2 includes a detection probe 21. The housing 1 has a communication cavity 14, and the communication cavity 14 is communicated with the cooking cavity. The detection probe 21 detects the air pressure in the cooking cavity through the communication cavity 14. The pressure detection device further includes a sealing member 4 sleeved on at least a partial area outside the detection probe 21. The sealing member 4 has a first sealing portion 45 surrounding the side portion of the detection probe 21, and a second sealing portion 46 protruding inward from the first sealing portion 45. The second sealing portion 46 abuts against the lower end of the detection probe 21.

[0046] In the present utility model, the detection probe 21 of the detection member 2 extends into the interior of the housing 1 to directly or indirectly detect the air pressure in the cooking cavity through the communication cavity 14 inside the housing 1. The sealing member 4 is sleeved outside the detection probe 21 to form a seal for the detection probe 21. Among them, the second sealing portion 46 is located below the detection probe 21 and abuts against the lower end of the detection probe 21, so that the second sealing portion 46 can form an upward stop with the detection probe 21. When the sealing member 4 is pushed by the air pressure in the inner cavity of the housing 1, the second sealing portion 46 tightly abuts against the detection probe 21, which not only forms a movement limit for the sealing member 4 towards the outside of the housing 1 to prevent the sealing member 4 from moving and affecting the seal, but also makes the contact between the sealing member 4 and the detection probe 21 closer, improving the sealing performance between the detection probe 21 and the sealing member 4. At the same time, the higher the air pressure in the communication cavity 14, the closer the second sealing portion 46 abuts against the detection probe 21, and the better the sealing effect, thereby further ensuring the reliability and detection accuracy of the pressure detection device during the high-pressure cooking process.

[0047] The arrangement of the through hole 42 enables the detection probe 21 to communicate with the inner cavity of the housing 1, so that the air pressure in the cooking cavity can be reflected by detecting the air pressure in the inner cavity of the housing 1.

[0048] Preferably, as Figure 4 shown, the sealing member 4 has a fitting channel 43 for the detection probe 21 to extend into, and the inner wall of the fitting channel 43 is provided with a sealing lip 44 protruding towards the inside of the fitting channel 43, and the sealing lip 44 abuts against the detection probe 21.

[0049] The sealing lip 44 abuts against the outer peripheral side of the detection probe 21, which can not only improve the sealing performance between the sealing member 4 and the detection probe 21, but also prevent the sealing member 4 from slipping relative to the detection probe 21. In this embodiment, the positional relationship between the inner side wall of the fitting channel 43 and the detection probe 21 is not limited. In one embodiment, the inner wall of the fitting channel 43 abuts against the outer peripheral side of the detection probe 21, making the abutment between the sealing lip 44 and the detection probe 21 closer and improving the sealing performance. In another embodiment, the inner wall of the fitting channel 43 does not contact the detection probe 21, and only the sealing lip 44 abuts against the detection probe 21 to reduce the risk of damage to the detection probe 21 caused by excessive extrusion by the sealing member 4.

[0050] Specifically, when the detection probe 21 is cylindrical and the through hole 42 is circular, the diameter of the through hole 42 is smaller than the diameter of the detection probe 21. Of course, the detection probe 21 and the through hole 42 can also be non-circular in shape.

[0051] As a preferred embodiment of the present utility model, as Figure 1As shown in the figure, the housing 1 has an installation channel 16 for the detection probe 21 to extend into. The pressure detection device further includes a seal 4 sleeved on at least a part of the outer side of the detection probe 21. A limiting rib 41 is provided on the outer peripheral side of the seal 4, and a mating rib 161 is provided on the inner wall of the installation channel 16. The mating rib 161 can be in abutting cooperation with the limiting rib 41 to limit the deformation of the limiting rib 41.

[0052] In the present utility model, the detection probe 21 of the detection member 2 is inserted and mated with the installation channel 16 of the housing 1 and extends into the interior of the housing 1 to directly or indirectly detect the air pressure in the cooking cavity through the communication cavity 14 inside the housing 1. A seal 4 is sleeved on the outer side of the detection probe 21. A limiting rib 41 is provided on the outer peripheral side of the seal 4, and a mating rib 161 protruding towards the inside of the installation channel 16 is provided on the inner wall of the installation channel 16, so that the limiting rib 41 and the mating rib 161 are arranged along the axial direction of the installation channel 16, and the mating rib 161 is located outside the installation channel 16 relative to the limiting rib 41, so that the limiting rib 41 can not only form a radial abutting seal with the inner wall of the installation channel 16, but also form an abutment with the mating rib 161 along the axial direction of the installation channel 16.

[0053] When the air pressure in the pot rises, even if the limiting rib 41 has a tendency to swing towards the entrance and exit of the installation channel 16, due to the abutment of the mating rib 161, the two will tightly abut, thereby ensuring the sealing performance between the detection probe 21 and the inner wall of the installation channel 16 and ensuring the detection accuracy of the detection probe 21. At the same time, the higher the air pressure in the communication cavity 14, the closer the abutment between the limiting rib 41 and the mating rib 161, and the better the sealing effect, thereby further ensuring the reliability and detection accuracy of the pressure detection device during the high-pressure cooking process.

[0054] Furthermore, as Figures 1 to 3 shown, the installation channel 16 extends towards the interior of the housing 1 to have a first installation end 162 close to the communication cavity 14 and a second installation end 163 far from the communication cavity 14. The mating rib 161 is located on the side of the limiting rib 41 towards the second installation end 163, and the projection of the limiting rib 41 along the axial direction of the installation channel 16 covers the mating rib 161.

[0055] During assembly, first, the seal 4 is sleeved outside at least a part of the detection probe 21, and then the detection probe 21 is inserted into the installation channel 16 from the second installation end 163. When the air pressure inside the pot increases, the air pressure pushes the seal 4 to have a tendency to move towards the second installation end 163. And the mating rib 161 is arranged outside the limiting rib 41, that is, on the side towards the second installation end 163, and the axial projection of the limiting rib 41 covers the mating rib 161, so that when the whole seal 4 has a tendency to move towards the second installation end 163, or when the limiting rib 41 has a tendency to move towards the second installation end 163, the mating rib 161 is on the movement path of the limiting rib 41, thereby forming a movement restriction on the limiting rib 41, which not only avoids the movement of the seal 4 and maintains good sealing, but also makes the limiting rib 41 tightly abut against the mating rib 161 under the push of the air pressure, improving the sealing performance.

[0056] It should be noted that the present utility model does not limit the abutting timing of the limiting rib 41 and the mating rib 161. In one embodiment, as Figure 1 、 Figure 2 shown, after the detection probe 21 and the housing 1 are assembled, the limiting rib 41 is located below the mating rib 161 and the two are in contact. In this way, the limiting rib 41 not only abuts against the inner side wall of the installation channel 16 in the radial direction to form a seal, but also contacts the mating rib 161 in the axial direction to form a seal, thus forming two seals. Once the limiting rib 41 has a tendency to move or deform towards the second installation end 163, the abutting force between it and the mating rib 161 gradually increases, and the seal between the two becomes tighter and tighter.

[0057] In another embodiment, after the detection probe 21 and the housing 1 are assembled, the limiting rib 41 is located below the mating rib 161 and the two are not in contact. At this time, the limiting rib 41 only abuts and seals with the inner side wall of the installation channel 16 in the radial direction. When the air pressure inside the pot increases, the limiting rib 41 swings towards the second installation end 163 under the push of the air pressure and gradually contacts and abuts against the mating rib 161.

[0058] Preferably, as Figure 3 shown, the second installation end 163 is provided with an insertion opening, and the edge of the insertion opening protrudes inwards to form the mating rib 161.

[0059] The mating rib 161 is located at the edge of the insertion opening. During assembly, the assembler can intuitively see the relative position relationship between the mating rib 161 and the limiting rib 41. When the limiting rib 41 is completely inserted into the installation channel 16 and is located below the mating rib 161, it means that the assembly is in place. Thus, it can give the assembler a more obvious and intuitive prompt without observing the inside of the installation channel 16, thereby reducing the assembly difficulty and improving the assembly efficiency.

[0060] It should be noted that the present utility model does not limit the detection method of the detection probe 21 for detecting the air pressure in the cooking cavity. It can directly detect the air pressure in the cooking cavity or indirectly detect the air pressure in the cooking cavity. Specifically, it can be any one of the following implementation manners:

[0061] Embodiment 1: In this embodiment, the detection probe 21 is located in the communication cavity 14 so that the communication cavity 14 connects the detection probe 21 and the cooking cavity. The air pressure in the communication cavity 14 is the same as that in the cooking cavity. Therefore, the detection probe 21 directly detects the air pressure in the communication cavity 14, which is the air pressure in the cooking cavity. Direct detection is achieved by directly connecting the detection probe 21 to the cooking cavity. The detection is simpler and more direct, and the program design is also simpler.

[0062] Embodiment 2: In this embodiment, as Figure 1 , Figure 2 , Figure 6 shown, the housing 1 further has a detection cavity 15. The detection probe 21 is connected to 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 detection probe 21 is used to detect the air pressure in the detection cavity 15.

[0063] In this embodiment, the detection probe 21 detects the air pressure in the cooking cavity by an indirect detection method. Specifically, the communication cavity 14 is connected to the cooking cavity and has the same air pressure as that in the cooking cavity. The communication cavity 14 is isolated from the detection cavity 15 by the deformation member 3. When the air pressure in the pot increases, there is an air pressure difference on both sides of the deformation member 3. The deformation member 3 deforms under the action of the air pressure difference and protrudes toward the detection cavity 15. At this time, the air pressure and volume in the detection cavity 15 change, and then the detection probe 21 detects the air pressure signal, so as to detect the air pressure in the cooking cavity by an indirect detection method. In this embodiment, the detection probe 21 is not directly connected to the cooking cavity, so that the steam, food soup, bubbles, etc. in the cooking cavity will not directly contact the detection probe 21, thereby keeping the detection probe 21 clean, improving the detection sensitivity and accuracy, and enhancing the reliability and service life of the detection probe 21.

[0064] Furthermore, as Figure 1 , Figure 2 , Figure 6 shown, the housing 1 includes a valve seat 11 and a valve body 12. The detection probe 21 and the detection cavity 15 are located on the valve seat 11, and the communication cavity 14 is located on the valve body 12. The valve seat 11 and the valve body 12 clamp and fix the deformation member 3. By clamping and fixing the deformation member 3 with the valve seat 11 and the valve body 12, the assembly of the deformation member 3 is made simpler and more convenient. Preferably, the deformation member 3 is a thin film structure so that it can be more easily pushed by the air pressure and deformed.

[0065] Further, the valve body 12 and the valve seat 11 are detachably connected to facilitate the removal of the valve body 12, the valve seat 11, and the deformable member 3 for separate cleaning, ensuring the cleanliness inside the housing 1. Specifically, as Figure 1 , Figure 2 shown, the valve body 12 and the valve seat 11 are threadedly connected. Of course, they can also be detachably connected by other means, such as snap connection, screw connection, etc., which are not limited herein. The housing 1 further includes a fixing portion 13 fixed to the valve body 12, and the fixing portion 13 and the valve body 12 together form a communication cavity 14. In one embodiment, as Figure 1 , Figure 2 , Figure 6 shown, the fixing portion 13 is a fixing nut and is fixed to the valve body 12 by threaded connection. A sealing ring 131 is provided at the connection between the fixing portion 13 and the valve body 12.

[0066] Preferably, as Figure 1 , Figure 2 , Figure 5 shown, a filter member 5 is further provided in the communication cavity 14. The filter member 5 has filter holes 51 to filter food residues, liquids, etc. in the communication cavity 14, filtering large particles of impurities in front of the filter member 5, and the gas acts on the deformable member 3 through the filter holes 51. Among them, the filter member 5 can be an independent component and is installed on the valve body 12 or the fixing portion 13 so that the filter member 5 is located in the communication cavity 14. Of course, the filter member 5 can also be a structure integrally formed with the valve body 12 or the fixing portion 13 so that it can be removed together with the valve body 12 or the fixing portion 13 for cleaning, reducing the installation and disassembly difficulty for users and improving the use experience.

[0067] In a preferred embodiment, as Figure 1 shown, in the initial state (undeformed state), the deformable member 3 protrudes toward the communication cavity 14, and the deformable member 3 is provided with a wrinkled portion. When the gas pushes the deformable member 3, as Figure 2 shown, the wrinkled portion expands or contracts to cause the deformable member 3 to deform. The wrinkled portion helps the deformable member 3 to undergo a collapse deformation instead of a tensile elastic deformation, eliminating the pressure difference between the upper and lower cavities caused by the tensile deformation and resulting in a large error in detection.

[0068] As a preferred implementation manner of the present invention, as Figure 3 , Figure 4 shown, the limiting rib 41 includes a first limiting rib 411 and a second limiting rib 412 that are axially spaced along the detection probe 21. A limiting groove 413 is formed between the first limiting rib 411 and the second limiting rib 412, and the mating rib 161 is located in the limiting groove 413 so that the first limiting rib 411 and the second limiting rib 412 are respectively located on both sides of the mating rib 161.

[0069] The first limiting rib 411 and the second limiting rib 412 are respectively located on the upper and lower sides of the mating rib 161, so that not only can a one-way limit be formed on the seal 4 axially outward along the installation channel 16, but also a limit can be formed in both axial directions, thereby ensuring the position reliability of the seal 4 on the one hand, and on the other hand making the abutment between the first limiting rib 411, the second limiting rib 412 and the mating rib 161 more reliable, and maintaining good sealing performance during both low-pressure and high-pressure cooking processes.

[0070] As a preferred embodiment of the present invention, as Figure 3 shown, the detection member 2 further includes a main body 22, the seal 4 is sleeved on the detection probe 21, and there is a clearance 23 between the seal 4 and the main body 22.

[0071] The seal 4 wraps the part of the detection probe 21 extending into the installation channel 16, and the part of the detection probe 21 located outside the installation channel 16 is exposed, which can not only save the material of the seal 4 and save costs, but also reduce the extrusion force of the seal 4 on the detection probe 21 on the premise of ensuring sealing, and reduce the risk of damage to the detection probe 21 due to excessive extrusion force.

[0072] Specifically, as Figure 3 、 Figure 6 shown, the pressure detection device further includes a cover 6, the detection member 2 is fixed to the cover 6, the cover 6 is fixed to the housing 1 by means of screws, clamping, etc., and the detection probe 21 of the detection member 2 extends into the installation channel 16 of the housing 1.

[0073] The present invention also discloses a pressure cooking appliance, including a pot body having a cooking cavity and a pot lid 7 covering the cooking cavity, and further including the above-mentioned pressure detection device; the pot lid 7 includes a liner lid 71 and an inner lid 72, the pressure detection device is arranged on the liner lid 71 or the inner lid 72, and the communication cavity 14 communicates with the cooking cavity.

[0074] Preferably, the pressure detection device is electrically connected to the control unit of the cooking appliance, so that the control unit can adjust 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, a signal is sent 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 or relieve the pressure.

[0075] Specifically, as Figure 7 shown, the inner lid 72 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 72, and the valve body 12 is located above the inner lid 72, and the two clamp the inner lid 72.

[0076] In the present utility model, those parts not described can be realized by adopting or referring to the existing technologies.

[0077] Each embodiment in this specification is described in a progressive manner. For the same or similar parts among the embodiments, reference can be made to each other, and the key points of each embodiment are the differences from other embodiments.

[0078] The above are only the embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, various modifications and changes 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 housing and a detection member fixed to the housing, the detection member comprising a detection probe, the housing having a connecting cavity, the connecting cavity being connected to a cooking cavity, the detection probe detecting the gas pressure in the cooking cavity through the connecting cavity, characterized in that: The pressure detection device further comprises a sealing member sleeved on at least a part of the outer side of the detection probe, wherein the sealing member comprises a first sealing portion surrounding the side of the detection probe, and a second sealing portion protruding from the first sealing portion toward the inside, wherein the second sealing portion abuts against the lower end of the detection probe; The second sealing portion forms a through hole, and the width of the through hole is smaller than the width of the detection probe.

2. The pressure detection device according to claim 1, characterized in that: The sealing component has a matching channel for the detection probe to extend into, and the inner wall of the matching channel is provided with a sealing lip protruding toward the inside of the matching channel, and the sealing lip abuts against the detection probe.

3. The pressure detection device according to claim 1, characterized in that: The shell has an installation channel for the detection probe to extend into, the outer peripheral side of the seal is provided with a limiting rib, the inner wall of the installation channel is provided with a matching rib, and the matching rib can cooperate with the limiting rib stopper to limit the deformation of the limiting rib.

4. The pressure detection device according to claim 3, characterized in that: The mounting channel extends toward the interior of the shell to have a first mounting end close to the connecting cavity, and a second mounting end away from the connecting cavity, the mating rib is located on the side of the limiting rib facing the second mounting end, and the projection of the limiting rib along the axial direction of the mounting channel covers the mating rib.

5. The pressure detection device according to claim 4, characterized in that: The second mounting end is provided with an insertion opening, and the edge of the insertion opening protrudes inwardly to form the matching rib.

6. The pressure detection device according to claim 3, characterized in that: The limiting rib includes a first limiting rib and a second limiting rib which are spaced apart along the axial direction of the detection probe, a limiting groove is formed between the first limiting rib and the second limiting rib, and the matching rib is located in the limiting groove so that the first limiting rib and the second limiting rib are respectively located on both sides of the matching rib.

7. The pressure detection device according to claim 1, characterized in that: The shell also has a detection cavity, the detection probe is connected to the detection cavity, a deformation piece is arranged between the detection cavity and the connecting cavity, the deformation piece can be deformed under the action of the air pressure difference between the detection cavity and the connecting cavity, and the detection probe is used to detect the air pressure in the detection cavity.

8. The pressure detection device according to claim 7, characterized in that: The shell comprises a valve seat and a valve body, the detection probe and the detection cavity are located on the valve seat, the communication cavity is located on the valve body, and the valve seat and the valve body clamp and fix the deformable member.

9. The pressure detection device according to claim 1, characterized in that: The detection component also includes a body. The sealing component is sleeved on the detection probe, and an avoidance gap is provided between the sealing component and the body.

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, and the connecting cavity is connected to the cooking cavity.

Images