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, the communication cavity is communicated with a cooking cavity, the detection piece detects the air pressure in the cooking cavity through the communication cavity, and the pressure detection device further comprises a filtering piece, the filtering piece is provided with a blocking part and a filtering hole and used for filtering airflow communicating the cooking cavity and the communicating cavity so as to penetrate through the filtering hole to act on the detecting piece. The blocking part of the filtering piece can block large-particle food residues and liquid, and gas can continuously upwelling through the filtering holes. In this way, the part, located above the filter piece, of the communicating cavity and the cleanliness of the detection piece or the diaphragm component are guaranteed. In addition, the filtering holes can also play a role in shunting the air flow, so that the contact between the air and the detection piece or the diaphragm component is more uniform, uniform deformation of each area of the diaphragm component is facilitated, and the accuracy of data acquisition 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, 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 member. The detection member extends into the housing and is directly connected to 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 chamber is connected to 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] For example, Chinese Patent CN109996475B discloses a pressure cooker and a pressure sensor unit. The chamber under the diaphragm member is connected to the cooking chamber, and the upper side is a sealed chamber. After the diaphragm member deforms under the action of the air pressure difference between the upper and lower chambers, the air pressure in the sealed chamber is detected by the pressure sensor to indirectly measure the air pressure in the cooking chamber.

[0005] For this structure of the pressure sensor unit, the cooking chamber is directly connected to the diaphragm member. Although this can ensure that the high-pressure gas directly acts on the diaphragm member, during the upwelling process of the high-pressure gas, it will inevitably carry bubbles, liquid, and food residues into the housing and directly contact the diaphragm member, thus adhering to the diaphragm member. As the use time increases, more and more dirt is deposited on the diaphragm member, which will gradually lose its elasticity and even have the risk of being punctured by food, reducing the detection accuracy of the pressure sensor. In severe cases, it may cause the pressure sensor to fail. For the pressure sensor with the detection member directly connected to the cooking chamber, the dirt directly contacts the internal channel of the housing and the detection member, and then deposits on the detection member and the inner wall of the channel, further increasing the risk of sensor misalignment or even failure.

[0006] Moreover, the temperature inside the housing is lower than that inside the pot. After the high-temperature steam surges into the housing, it will condense into condensate when it meets the cold, and then adhere to the inner wall of the channel. When the user flips and opens the pot lid, or removes and inverts the pot lid, the condensate on the inner wall of the channel will directly flow to the diaphragm member or the detection member, further increasing the risk of contamination of the diaphragm member or the detection member.

[0007] Moreover, the housing is usually provided with a passage for the gas in the cooking cavity to rush upward into the housing. The passage is relatively small in size compared to the space in the cooking cavity. Therefore, under the high pressure inside the pot, the gas will rush into the passage at high speed, thus violently colliding directly with the diaphragm component or the detection component. On the one hand, it will cause uneven stress on each area of the diaphragm component, and the degree of deformation of each area is also uneven, affecting the detection accuracy. On the other hand, the high-speed impact of the gas will also bring the risk of the diaphragm component being broken through or the detection component being damaged. Summary of the Invention

[0008] The present invention provides a pressure detection device and a pressure cooking appliance to solve the problems that the cooking cavity is directly connected to the diaphragm component or the detection component of the pressure sensor, resulting in the diaphragm component and the detection component being easily contaminated, affecting the pressure measurement accuracy, and the gas acting unevenly on the diaphragm component or the detection component, reducing the detection accuracy, or causing damage.

[0009] The technical solution adopted by the present invention is as follows:

[0010] A pressure detection device includes a housing and a detection component fixed to the housing. The housing has a communication cavity that communicates with the cooking cavity. The detection component detects the air pressure in the cooking cavity through the communication cavity. The pressure detection device further includes a filter component. The filter component has a blocking portion and filter holes. The filter component is used to filter the airflow communicating the cooking cavity and the communication cavity to act on the detection component through the filter holes.

[0011] The pressure detection device of the present invention further has the following additional technical features:

[0012] The filter component and the housing are of a split structure, and the filter component is installed on the housing; or, the filter component and the housing are of an integrally formed structure.

[0013] The housing includes a valve seat and a valve body detachably connected to the valve seat. At least part of the communication cavity is located in the valve body. The valve body has partition ribs located in the communication cavity, and the partition ribs form the filter component.

[0014] The housing includes a first fixing portion and a second fixing portion. The filter component is located between the first fixing portion and the second fixing portion to divide the communication cavity into a first chamber located in the first fixing portion and a second chamber located in the second fixing portion. The first fixing portion and the second fixing portion are detachably connected.

[0015] The filter component is integrally formed with the second fixing portion; or, the first fixing portion and the second fixing portion clamp and fix the filter component.

[0016] The housing further has a detection chamber, the detection member is in communication with the detection chamber, a deformation member is provided between the detection chamber and the communication chamber, at least a part of the deformation member can deform under the action of the air pressure difference between the detection chamber and the communication chamber, and the detection member is used to detect the air pressure in the detection chamber.

[0017] A protruding portion is provided on the middle part of the deformation member facing the filter member, and the protruding portion can deform under the action of the air pressure difference between the detection chamber and the communication chamber.

[0018] The filter member is arranged between the cooking chamber and the communication chamber; alternatively, the filter member is arranged in the communication chamber.

[0019] The filter member is arranged between the cooking chamber and the communication chamber, and the volume of the communication chamber is larger than that of the detection chamber; alternatively, the filter member is arranged in the communication chamber to form a filter chamber between the filter member and the deformation member, and the volume of the filter chamber is smaller than that of the detection chamber.

[0020] The present utility model also discloses a pressure cooking appliance, which includes a pot body having a cooking chamber and a pot lid covering the cooking chamber, 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 chamber is in communication with the cooking chamber.

[0021] Due to the adoption of the above technical solutions, the beneficial effects obtained by the present utility model are as follows:

[0022] 1. In the present utility model, the detection member is inserted and matched with the installation channel of the housing and extends into the interior of the housing to directly or indirectly detect the air pressure in the cooking chamber through the communication chamber inside the housing. At the same time, a filter member is arranged in the communication chamber. After the gas, bubbles, liquid and food residues in the cooking chamber surge into the communication chamber, the blocking portion of the filter member can block the large-particle food residues and liquid, and after colliding with the blocking portion, they will fall back into the cooking chamber 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 breaking 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, it is ensured that the part of the communication chamber above the filter member, as well as the detection member or the diaphragm component, is clean, which not only reduces the cleaning pressure of the user, but also enables the detection member to maintain a high detection accuracy.

[0023] In addition, the filter holes can also play a role in shunting the air flow, so that the air flow converged in the communication chamber passes through the filter member more dispersedly and acts on the detection member or the diaphragm component. On the one hand, it makes the contact between the gas and the detection member or the diaphragm component more uniform, helps the diaphragm component to be uniformly stressed in each area and thus deform uniformly, improves the accuracy of the data collected by the detection member, and on the other hand, it can appropriately reduce the impact force of the gas, thereby reducing the risk of damage to the diaphragm component or the detection member due to a large impact.

[0024] 2. As a preferred embodiment of the present utility model, the housing includes a valve seat and a valve body detachably connected to the valve seat. At least part of the communication cavity is located in the valve body. The valve body has partition ribs located in the communication cavity, and the partition ribs form a filter element. At least part of the communication cavity is located in the valve body, and the valve body is detachably connected to the valve seat, enabling the user to remove the valve body. At this time, the communication cavity is opened, and the user can clean the valve body and the inside of the communication cavity, thereby ensuring the cleanliness of the communication cavity. At the same time, the user's operation is relatively simple and convenient. In addition, the partition ribs on the valve body form a filter element, making the filter element integrally formed with the valve body, that is, the filter element can be removed from the valve seat together with the valve body, and then the filter element can be cleaned together. When assembling after cleaning, assembling the valve body and the valve seat synchronously completes the installation of the filter element without the need for separate installation of the filter element, thereby ensuring the position stability of the filter element and thus ensuring the filtering effect.

[0025] 3. As a preferred embodiment of the present utility model, the housing further has a detection cavity. The detection element is in communication with the detection cavity. A deformation element is provided between the detection cavity and the communication cavity. At least part of the deformation element can deform under the action of the air pressure difference between the detection cavity and the communication cavity. The detection element is used to detect the air pressure in the detection cavity. In this embodiment, the detection element detects the air pressure in the cooking cavity by an indirect detection method. Specifically, the communication cavity is in communication with the cooking cavity and has the same air pressure as that in the cooking cavity. The communication cavity and the detection cavity are isolated by the deformation element. When the air pressure in the pot increases, there is an air pressure difference on both sides of the deformation element, and the deformation element deforms under the action of the air pressure difference and protrudes towards the detection cavity. At this time, the air pressure and volume in the detection cavity change, and then the detection element detects the air pressure signal, so as to be able to detect the air pressure in the cooking cavity by an indirect detection method. The detection element is not directly in communication 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, improving the detection sensitivity and accuracy, and improving the reliability and service life of the detection probe. At the same time, due to the presence of the filter element in the communication cavity, the pollution received by the deformation element can also be reduced, keeping the deformation element with good elastic deformation ability.

[0026] 4. As a preferred embodiment of the present utility model, the filter element is arranged between the cooking cavity and the communication cavity, and the volume of the communication cavity is larger than the volume of the detection cavity. The filter element is located between the cooking cavity and the communication cavity, so that the gas entering the communication cavity is the gas filtered by the filter element. Moreover, the volume of the communication cavity is relatively large, and the gas is evenly distributed in the communication cavity, making the pressure in the communication cavity uniform and sufficient. When acting on the deformation element, it is more uniform, making the deformation consistency of the deformation element higher and the detection of the detection element more accurate.

[0027] 5. As a preferred embodiment of the present utility model, the filter member includes a filtering portion and a mounting portion surrounding the outer peripheral side of the filtering portion. The filtering portion protrudes towards the cooking cavity relative to the mounting portion, so as to form a diversion transition surface on the side of the filter member facing the cooking cavity. When the gas, bubbles, etc. in the cooking cavity come into contact with the filter member, part of the liquid, food residues, etc. will adhere to the surface of the filter member. Through the diversion transition surface, the liquid and food residues on the filter member can be guided to slide downward along the diversion transition surface in a timely manner and drip into the cooking cavity, thereby avoiding accumulation on the filter member, and further avoiding the liquid being driven by the impact force of the gas to pass through the filter holes, ensuring the filtering effect of the filter member. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] 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 and descriptions thereof are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0029] Figure 1 is a cross-sectional view of a pressure detection device under an embodiment of the present utility model;

[0030] Figure 2 is Figure 1 a cross-sectional view of the valve body in

[0031] Figure 3 is a cross-sectional view of a pressure detection device under another embodiment of the present utility model;

[0032] Figure 4 is Figure 3 a schematic structural view of the filter member in

[0033] Figure 5 is a cross-sectional view of a pressure detection device under yet another embodiment of the present utility model;

[0034] Figure 6 is Figure 5 a cross-sectional view of the second fixing portion in

[0035] Figure 7 is a cross-sectional view of a pressure detection device under yet another embodiment of the present utility model;

[0036] Figure 8 is Figure 7 a cross-sectional view of the second fixing portion in

[0037] Figure 9 is Figure 1 an exploded structural view of the pressure detection device in

[0038] Figure 10 is a cross-sectional view of a pot lid under an embodiment of the present utility model.

[0039] Wherein:

[0040] 1 housing; 11 valve seat; 12 valve body; 121 accommodating groove; 122 partition rib; 13 communication cavity; 14 detection cavity; 15 first fixing portion; 16 second fixing portion;

[0041] 2 detection member;

[0042] 3 deformable member; 31 positioning rib; 32 protruding portion; 33 wrinkled portion;

[0043] 4 filter member; 41 filter hole; 42 blocking portion; 43 filtering portion; 44 mounting portion; 45 flow guiding transition surface; 46 filter cavity;

[0044] 5 pot lid; 51 lining lid; 52 inner lid. Detailed implementation manners

[0045] 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.

[0046] 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.

[0047] 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 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 thus should not be construed as a limitation to the present utility model.

[0048] In the present utility model, unless otherwise clearly defined and limited, the terms "mounting", "connecting", "coupling", "fixing", 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 connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of 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.

[0049] In the present utility model, unless otherwise clearly specified and defined, 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 expressions of the above terms do 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.

[0050] 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 13 which communicates with a cooking cavity. The detection member 2 detects the air pressure in the cooking cavity through the communication cavity 13. The pressure detection device further includes a filter member 4 disposed in the communication cavity 13. The filter member 4 has a blocking portion and filter holes 41. The filter member 4 is used for filtering the air flow communicating the cooking cavity and the communication cavity 13 so as to act on the detection member 2 through the filter holes 41.

[0051] In the present utility model, the detection member 2 is inserted and fitted with the installation channel 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 13 inside the housing 1. At the same time, a filter member 4 is disposed in the communication cavity 13. After the gas in the cooking cavity carries bubbles, liquid and food residues and surges into the communication cavity 13, the blocking portion of the filter member 4 can block the large-particle food residues and liquid, so that after colliding with the blocking portion, they fall back into the cooking cavity under the action of gravity, and 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 separates the liquid and gas in the bubbles, and the liquid falls back. In this way, the part of the communication cavity 13 above the filter member 4, as well as the detection member 2 or the diaphragm component, is ensured to be clean, which not only reduces the cleaning pressure of the user, but also enables the detection member 2 to maintain high detection accuracy.

[0052] Even if the user flips the pot lid or turns the pot lid upside down, the blocking portion can also play a certain role in blocking the liquid and food residues in the communication cavity 13 to prevent dirt from directly reaching the detection member 2.

[0053] In addition, the filtering holes 41 can also play a role in diverting the airflow, making the airflow converged in the communication cavity 13 pass through the filtering member 4 more dispersedly, and acting on the detecting member 2 or the diaphragm member. Thus, on the one hand, the contact between the gas and the detecting member 2 or the diaphragm member is made more uniform, which helps the diaphragm member to be uniformly stressed in each area and thus deform uniformly, improving the accuracy of the data collected by the detecting member 2. On the other hand, it can appropriately reduce the impact force of the gas, thereby reducing the risk of damage to the diaphragm member or the detecting member 2 due to a large impact.

[0054] Preferably, the filtering member 4 is a filter mesh structure, that is, the filtering member 4 is provided with a plurality of filtering holes 41, and the barrier portions 42 are arranged between the respective filtering holes 41.

[0055] It should be noted that the present utility model does not limit the detection method of the detecting member 2 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 embodiments:

[0056] Embodiment 1: In this embodiment, the detecting member 2 is located in the communication cavity 13 so that the communication cavity 13 connects the detecting member 2 and the cooking cavity. The air pressure in the communication cavity 13 is consistent with that in the cooking cavity. The airflow in the cooking cavity can directly act on the detecting member 2 after passing through the filtering member 4. Therefore, the detecting member 2 directly detects the air pressure in the communication cavity 13, which is the air pressure in the cooking cavity. The direct detection is realized by directly connecting the detecting member 2 with the cooking cavity. The detection is simpler and more direct, and the program design is also simpler.

[0057] Embodiment 2: In this embodiment, as Figure 1 , Figure 3 shown, the housing 1 further has a detection cavity 14. The detecting member 2 is communicated with the detection cavity 14. A deformation member 3 is arranged between the detection cavity 14 and the communication cavity 13. At least part of the deformation member 3 can deform under the action of the air pressure difference between the detection cavity 14 and the communication cavity 13. The detection probe is used to detect the air pressure in the detection cavity 14.

[0058] In this embodiment, the detecting member 2 detects the air pressure in the cooking cavity by an indirect detection method, that is, the airflow in the cooking cavity does not directly contact the detecting member 2 after passing through the filtering member 4, but contacts the deformation member 3 and pushes the deformation member 3 to deform. Specifically, the communication cavity 13 is communicated with the cooking cavity and has the same air pressure as that in the cooking cavity. The communication cavity 13 and the detection cavity 14 are isolated 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 towards the detection cavity 14. At this time, the air pressure and volume in the detection cavity 14 change, and then the detecting member 2 detects the air pressure signal, so as to detect the air pressure in the cooking cavity by an indirect detection method.

[0059] The detection member 2 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, improving the detection sensitivity and accuracy, and enhancing the reliability and service life of the detection probe. At the same time, due to the presence of the filter member 4 in the communication cavity 13, the pollution received by the deformable member 3 can also be reduced, enabling the deformable member 3 to maintain good elastic deformation ability.

[0060] Preferably, as Figure 1 shown, a protrusion 32 is provided on the middle part of the deformable member 3 facing the filter member 4, and the protrusion 32 can deform under the action of the air pressure difference between the detection cavity 14 and the communication cavity 13. Further, as Figure 1 shown, a corrugated portion 33 is further provided on the outer periphery of the protrusion 32 of the deformable member 3, and the corrugated portion 33 can expand or contract to provide deformation allowance for the protrusion 32 in the way of buckling deformation.

[0061] Further, as Figure 1 、 Figure 3 shown, the housing 1 includes a valve seat 11 and a valve body 12. The detection member 2 and the detection cavity 14 are located on the valve seat 11, and the communication cavity 13 is located in the valve body 12. The valve seat 11 and the valve body 12 clamp and fix the deformable member 3. By clamping and fixing the deformable member 3 with 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 as to be more easily pushed by air pressure and deformed.

[0062] Preferably, as Figure 1 、 Figure 3 shown, the valve seat 11 and / or the valve body 12 are provided with a receiving groove 121. The deformable member 3 includes a fixing portion and a deformable portion located between the communication cavity 13 and the detection cavity 14. The fixing portion is provided with a positioning rib 31, and the positioning rib 31 is located in the receiving groove 121.

[0063] The valve body 12 and the valve seat 11 fix the deformable member 3 by clamping, and the positioning rib 31 of the deformable member 3 cooperates with the receiving groove 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 positioning rib 31 and the receiving groove 121, the position of the deformable member 3 is relatively fixed, thus ensuring the reliability of 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 Figure 1As shown, the positioning rib 31 protrudes towards the valve body 12, and the valve body 12 is correspondingly provided with a receiving groove 121 that cooperates with the positioning rib 31. Of course, the positioning rib 31 can also protrude upwards, and the receiving groove 121 is correspondingly provided on the valve seat 11. Or the fixing part is provided with a positioning rib 31 protruding upwards and a positioning rib 31 protruding downwards, and the valve seat 11 and the valve body 12 are both provided with receiving grooves 121 to cooperate with the positioning rib 31.

[0065] Preferably, as Figure 3 shown, in the state where the deformable member 3 is not deformed, there is a gap between the deformable member 3 and the filter member 4, which facilitates the user to clean the filter holes 41 without disassembling the filter member 4. The user can insert a tool into the filter holes 41 for cleaning to avoid the filter holes 41 being blocked by dirt. At the same time, the gap between the deformable member 3 and the filter member 4 can prevent the deformable member 3 from being accidentally punctured by the user when cleaning the filter holes 41.

[0066] The setting position of the filter member in this embodiment is not limited. In one embodiment, the filter member 4 is arranged between the cooking cavity and the communication cavity to ensure the cleanliness of the communication cavity 13. In another embodiment, as Figure 1 shown, the filter member 4 is arranged in the communication cavity 13. Compared with the method of fixing the filter member 4 outside the communication cavity 13, the filter member 4 of the present invention is arranged inside the communication cavity 13, which can also realize the hidden design of the filter member 4. While improving the aesthetics, the filter member 4 is stably and reliably connected to the housing 1, avoiding the filter member 4 slipping off the housing 1. Moreover, the filter member 4 can also block the detection member 2, so that the user cannot directly see and touch the detection member 2 from the outside, thereby avoiding damage to the detection member 2.

[0067] Preferably, the filter member 4 is arranged between the cooking cavity and the communication cavity 13, and the volume of the communication cavity 13 is larger than the volume of the detection cavity 14. The filter member 4 is located between the cooking cavity and the communication cavity 13, so that the gas entering the communication cavity 13 is the gas filtered by the filter member 4. And the volume of the communication cavity 13 is larger, and the gas is evenly distributed in the communication cavity 13, so that the pressure in the communication cavity 13 is uniform and sufficient, and thus acts on the deformable member 3 more evenly, making the deformation consistency of the deformable member 3 higher and making the detection of the detection member 2 more accurate.

[0068] Or, as Figure 1 shown, the filter member is arranged in the communication cavity to form a filter cavity 46 between the filter member 4 and the deformable member 3, and the volume of the filter cavity 46 is smaller than the volume of the detection cavity 14. The volume of the chamber downstream of the filter member 4 is smaller, and the volume of the chamber upstream is larger, so that the gas pressure distribution upstream of the filter member 4 is uniform, and thus the gas passes through the filter member 4 evenly, and the filter member 4 is not easily blocked, ensuring that the filter holes 41 are unobstructed.

[0069] It should be noted that the present utility model does not limit the assembly method of the filter element 4 and the housing 1. Among them, as Figure 3 , Figure 4 shown, the filter element 4 and the housing 1 can be of a split structure, and the filter element 4 is installed into the communication cavity 13 of the housing 1 through subsequent assembly. This facilitates the user to separately remove the filter element 4 from the housing 1 for cleaning the filter element 4. For example, in a specific embodiment, as Figure 3 shown, the housing 1 includes a valve seat 11 and a valve body 12, the filter element 4 is located between the valve seat 11 and the valve body 12, and the filter element 4 is clamped and fixed by the valve seat 11 and the valve body 12.

[0070] Of course, the filter element 4 can also be integrally formed with the housing 1 so that the filter element 4 cannot be detached from the housing 1 to ensure the connection stability between the filter element 4 and the housing 1 and improve the reliability of the filtering function.

[0071] Preferably, in a preferred embodiment, as Figure 1 , Figure 2 shown, the housing 1 includes a valve seat 11 and a valve body 12 detachably connected to the valve seat 11. At least part of the communication cavity 13 is located in the valve body 12, and the valve body 12 has partition ribs 122 located in the communication cavity 13, and the partition ribs 122 constitute the filter element 4.

[0072] At least part of the communication cavity 13 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 13 is opened, and the user can clean the valve body 12 and the inside of the communication cavity 13, thereby ensuring the cleanliness of the communication cavity 13, and at the same time, the user's operation is relatively simple and convenient. In addition, the partition ribs 122 on the valve body 12 constitute the filter element 4, so that the filter element 4 is integrally formed with the valve body 12, 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 separately install the filter element 4, and thus can ensure the position stability of the filter element 4, thereby ensuring the filtering effect.

[0073] Specifically, as Figures 1 to 4 shown, the valve body 12 and the valve seat 11 are connected by threads. Of course, the two can also be detachably connected by other means, such as snap connection, screw connection, etc., which are not limited here.

[0074] In another preferred embodiment, as Figures 5 to 8As shown in the figure, the housing 1 includes a first fixing portion 15 and a second fixing portion 16. The filter element 4 is located between the first fixing portion 15 and the second fixing portion 16, so as to divide the communication cavity 13 into a first chamber located in the first fixing portion 15 and a second chamber located in the second fixing portion 16. The first fixing portion 15 and the second fixing portion 16 are detachably connected.

[0075] In a specific example of this embodiment, as Figure 5 、 Figure 7 shown, the housing 1 includes a valve seat 11, a valve body 12 and a fixing nut. The valve seat 11 and the valve body 12 together constitute the first fixing portion 15, and the fixing nut constitutes the second fixing portion 16. Among them, the valve seat 11 and the valve body 12 can be a detachable structure, or the valve seat 11 and the valve body 12 can be non-detachable. Part of the communication cavity 13 is located in the valve body 12, and part is located in the fixing nut. The filter element 4 is located between the fixing nut and the valve body 12, so as to divide the communication cavity 13 into upper and lower chambers.

[0076] As Figure 5 shown, the valve seat 11 is further provided with a detection cavity 14, and a deformation member 3 is also provided between the valve seat 11 and the valve body 12. Of course, the deformation member 3 can also be not provided, so that the air flow directly acts on the detection member 2 after passing through the filter element 4, which is not limited here.

[0077] Furthermore, as Figures 5 to 8 shown, the filter element 4 can be integrally formed with the second fixing portion 16, so that the user can detach the filter element 4 together by detaching the second fixing portion 16 for cleaning. The filter element 4 can also be set as a structure independent of the first fixing portion 15 and the second fixing portion 16, and is clamped and fixed by the first fixing portion 15 and the second fixing portion 16.

[0078] Specifically, as Figure 7 、 Figure 8 shown, the filter element 4 can be located at the top of the second fixing portion 16, or as Figure 5 、 Figure 6 shown, it can be located at the bottom of the second fixing portion 16, which is not limited here, as long as the filter element 4 is upstream of the detection member 2 or the deformation portion in the air flow direction.

[0079] As a preferred embodiment of the present utility model, as Figure 3 shown, the filter element 4 includes a filtering portion 43 and a mounting portion 44 surrounding the outer peripheral side of the filtering portion 43. The filtering portion 43 protrudes towards the cooking cavity relative to the mounting portion 44, so as to form a diversion transition surface 45 on the side of the filter element 4 facing the cooking cavity.

[0080] After the gas, bubbles, etc. in the cooking cavity come into contact with the filter element 4, some liquid, food residues, etc. will adhere to the surface of the filter element 4. Through the diversion transition surface 45, the liquid and food residues on the filter element 4 can be guided to slide downward along the diversion transition surface 45 in a timely manner and drip into the cooking cavity, thus avoiding accumulation on the filter element 4, and preventing the liquid from being driven by the impact force of the gas to pass through the filter holes 41, ensuring the filtering effect of the filter element 4.

[0081] The diversion transition surface 45 can be an inclined surface, an arc surface or other irregular curved surfaces, etc., as long as it can guide the liquid to flow downward, and no limitation is made here.

[0082] It should be noted that the present utility model does not limit the setting position of the filter holes 41. The filter holes 41 can be only opened in the filtering part 43, and no openings are provided at other positions of the filter element 4 for the air flow to pass through. It is also possible to make the filter holes 41 not only opened in the filtering part 43, but also opened in at least part of the installation part 44, so as to increase the number of filter holes 41. On the basis of ensuring the filtering effect, the air flow passing efficiency is improved, and then it can act on the detection element 2 quickly, thereby improving the reaction sensitivity of the detection element 2.

[0083] 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 also includes the above-mentioned pressure detection device; as Figure 10 shown, the pot lid 5 includes a lining lid 51 and an inner lid 52, and the pressure detection device is arranged on the lining lid 51 or the inner lid 52, and the communication cavity 13 is communicated with the cooking cavity.

[0084] Specifically, as Figure 10 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 second fixing part 16, the second fixing part 16 is located below the inner lid 52, and the valve body 12 is located above the inner lid 52, and the two clamp the inner lid 52.

[0085] 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.

[0086] In the present utility model, the parts not described can be realized by adopting or referring to the existing technologies.

[0087] 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 point of each embodiment is to illustrate the differences from other embodiments.

[0088] 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 variations 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, wherein the housing has a connecting cavity, the connecting cavity is connected to a cooking cavity, and the detection member detects the air pressure in the cooking cavity through the connecting cavity, characterized in that: The pressure detection device further comprises a filter element, wherein the filter element has a blocking portion and a filter hole, and the filter element is used for filtering the airflow connecting the cooking cavity and the communication cavity so as to pass through the filter hole and act on the detection element.

2. The pressure detection device according to claim 1, characterized in that: The filter element and the housing are separate structures, and the filter element is installed on the housing; or, The filter element and the housing are integrally formed.

3. The pressure detection device according to claim 2, characterized in that: The housing comprises a valve seat and a valve body detachably connected to the valve seat, at least a portion of the communication cavity is located in the valve body, the valve body has a partition rib located in the communication cavity, and the partition rib constitutes the filter element.

4. The pressure detection device according to claim 1, characterized in that: The shell includes a first fixing part and a second fixing part, and the filter element is located between the first fixing part and the second fixing part to divide the connecting cavity into a first chamber located in the first fixing part and a second chamber located in the second fixing part, and the first fixing part is detachably connected to the second fixing part.

5. The pressure detection device according to claim 4, characterized in that: The filter element and the second fixing portion are integrally formed; or, the first fixing portion and the second fixing portion clamp and fix the filter element.

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

7. The pressure detection device according to claim 6, characterized in that: A protrusion is arranged at the middle of the deformable element toward the filter element, and the protrusion can be deformed under the action of the air pressure difference between the detection cavity and the communication cavity.

8. The pressure detection device according to claim 6, characterized in that: The filter is arranged between the cooking cavity and the communicating cavity; or, the filter is arranged in the communicating cavity.

9. The pressure detection device according to claim 6, characterized in that: The filter is disposed between the cooking cavity and the communicating cavity, and the volume of the communicating cavity is greater than the volume of the detecting cavity; or, The filter element is arranged in the communicating cavity to form a filter cavity between the filter element and the deforming element, and the volume of the filter cavity is smaller than the volume of the detection cavity.

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.

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