Micro-pressure cooking utensil

Abstract

The micro-pressure cooking utensil comprises a pot cover, the pot cover is provided with an exhaust valve assembly, and the exhaust valve assembly comprises a valve seat with an air inlet channel, a valve deck with an exhaust channel and an exhaust cavity defined by the valve seat and the valve deck in a matched mode. The valve seat is provided with a liquid storage tank which is arranged around the air inlet channel and is provided with an upward opening, the exhaust valve assembly further comprises a micro-pressure part, and the micro-pressure part is movably arranged on the valve seat so as to form a first steam exhaust state in which the micro-pressure part abuts against the liquid storage tank and a second steam exhaust state in which the micro-pressure part is separated from the liquid storage tank. When the micro-pressure part is in the first steam exhaust state, the interior of the cooking cavity of the cooking utensil can be in a micro-pressure cooking state, the cooking efficiency can be improved, food cooking is more uniform, fiber tissues of food can be softened more easily when cooking is conducted in the micro-pressure environment, and the cooking effect of the food is improved.

Description

Technical Field

[0001] This application belongs to the technical field of kitchen utensils, and particularly relates to a micro-pressure cooking appliance. Background Art

[0002] During the cooking process of an electric rice cooker, the steam in the cooker body is discharged to the outside through a steam valve provided on the cooker lid. The existing steam valve is of an open design, that is, the steam valve is provided with an air inlet and an air outlet. The air inlet is communicated with the cooking cavity, and the air outlet is directly communicated with the outside atmosphere. To prevent overflow, various anti-overflow structures are provided in the gas flow path from the air inlet to the air outlet of the steam valve. During the cooking process, the steam valve maintains the pressure in the cooker body through the obstructive effect generated by the anti-overflow structure during exhaust. Therefore, the pressure can only be maintained when the pressure in the cooker body is relatively high. In the normal-pressure cooking state, the steam valve is in a state of being directly communicated with the outside, and during this process, a large amount of steam will overflow, which not only causes heat loss, but also leads to insufficient cooking of the food. For example, when cooking rice, the starch conversion is not sufficient, affecting the cooking taste and cooking effect of the food. Moreover, during the process close to the end of cooking and during the heat preservation process, the heat and steam in the cooker body are discharged through the steam valve, resulting in not only poor heat preservation effect, but also poor moisture retention effect. The food becomes cold and dry, reducing the cooking taste. Summary of the Utility Model

[0003] This application provides a micro-pressure cooking appliance to solve the technical problems that in the existing cooking appliances, steam is discharged during normal-pressure cooking, causing heat loss, and steam is discharged during the heat preservation process, resulting in poor heat preservation and moisture retention effects and affecting the cooking taste of the food.

[0004] The technical solution adopted in this application is as follows:

[0005] A micro-pressure cooking appliance includes a cooker lid, and an exhaust valve assembly is provided on the cooker lid. The exhaust valve assembly includes a valve seat having an air inlet passage, a valve cover having an exhaust passage, and an exhaust cavity formed by the cooperation of the valve seat and the valve cover. The valve seat is provided with a liquid storage groove arranged around the air inlet passage and opening upward. The exhaust valve assembly further includes a micro-pressure member, and the micro-pressure member is movably arranged on the valve seat to form a first exhaust state in which it abuts against the liquid storage groove and a second exhaust state in which it is separated from the liquid storage groove.

[0006] The micro-pressure cooking appliance in this application further includes the following additional technical features:

[0007] The valve seat is further provided with a liquid collecting groove communicated with the liquid storage groove and a liquid discharge hole communicated with the liquid collecting groove. A flow discharge member is further provided on the valve seat, and the flow discharge member is movably arranged on the valve seat to have a flow discharge state in which the liquid discharge hole is opened and a blocking state in which the liquid discharge hole is closed.

[0008] The liquid storage tank and the liquid collection tank are in communication with each other, and the height of the bottom surface of the liquid storage tank is lower than the height of the bottom surface of the liquid collection tank.

[0009] The valve seat is provided with a plurality of the liquid discharge holes. The flow discharge member includes a sealing gasket, an anti - detachment portion, and a connecting portion connecting the sealing gasket and the anti - detachment portion. The valve seat is provided with a mounting hole adapted to the connecting portion. The flow discharge member floats up and down to open or close the liquid discharge holes through the sealing gasket.

[0010] The valve seat is provided with an air inlet cylinder extending into the exhaust cavity. The inside of the air inlet cylinder is hollow to form the air inlet passage. The micro - pressure member includes a top cover and a side plate connected to the top cover and extending downward. In the first exhaust state, the side plate abuts against the liquid storage tank.

[0011] The top cover is provided with a ventilation hole communicating the air inlet passage and the exhaust cavity.

[0012] In the first exhaust state, the bottom of the side plate abuts against the bottom wall of the liquid storage tank, and at least one of the bottom of the side plate and the bottom wall of the liquid storage tank is provided with a tip for reducing the contact area between the two.

[0013] The air inlet cylinder has a top opening and a side notch, and both the top opening and the side notch communicate with the air inlet passage.

[0014] The micro - pressure member floats up and down to switch between the first exhaust state and the second exhaust state. The exhaust valve assembly further includes a guiding structure for guiding the floating of the micro - pressure member. The guiding structure includes a guiding hole provided on one of the micro - pressure member and the valve seat, and a guiding rod provided on the other of the two.

[0015] The pot lid includes a lining lid and an inner lid detachably mounted on the lining lid. The exhaust valve assembly is mounted on the inner lid, and the valve seat is detachably connected to the valve cover.

[0016] Due to the adoption of the above - mentioned technical solutions, the beneficial effects obtained by this application are:

[0017] 1. The micro-pressure component in this application is movably arranged on the valve seat and can be switched between the first exhaust state and the second exhaust state under the action of the pressure in the cooking cavity of the cooking appliance. When the pressure in the cooking cavity of the cooking appliance is relatively high, the micro-pressure component is in the second exhaust state. By exhausting, the excessive pressure in the cooking cavity is avoided. During the exhaust process, since the fluid needs to overcome the obstruction of the micro-pressure component to be discharged, when the surging fluid impacts the micro-pressure component, not only can the flow rate of the fluid be reduced, its energy consumption loss be increased, and its direct overflow be avoided, but also the bubbles entrained in the fluid can be broken, further enhancing the anti-overflow effect. During normal-pressure cooking, when cooking is nearly completed, and in the heat preservation state, the micro-pressure component is in the first exhaust state. Part of the steam generated in the cooking cavity condenses in the exhaust cavity and accumulates in the liquid storage tank. The micro-pressure component abuts against the liquid storage tank, avoiding the loss of heat and steam in the cooking cavity. During the cooking process, the reduction of heat loss can, on the one hand, improve the cooking efficiency, and on the other hand, help the food to be fully decomposed and transformed, enhancing the cooking effect of the food. In the heat preservation stage, the reduction of heat and steam loss helps to keep the food warm and lock in moisture, achieving the tenderization of the food and the retention of flavor.

[0018] Furthermore, when the micro-pressure component is in the first exhaust state, the micro-pressure component abuts against the liquid storage tank to form a water seal effect, which helps to form a micro-pressure environment in the cooking cavity. The micro-pressure environment helps to make the heat distribution in the cooking cavity more uniform. It can not only improve the cooking efficiency and make the food cooking more uniform, but also make the fiber tissue of the food easier to soften in the micro-pressure environment. For starchy foods, they are more likely to gelatinize in the micro-pressure environment, which is more conducive to the action of amylase and enhances the cooking effect of the food. In addition, in the micro-pressure environment, the loss of nutrients in the food can be reduced, maintaining the original flavor and taste of the food and enhancing the user experience.

[0019] 2. As a preferred implementation mode of this application, the valve seat is further provided with a liquid collecting tank, a liquid discharge hole, and a flow-discharging component. The flow-discharging component is movably arranged on the valve seat to have a flow-discharging state of opening the liquid discharge hole and a plugging state of closing the liquid discharge hole. The liquid condensed from the steam in the exhaust cavity, as well as the liquid entering the exhaust cavity during the anti-overflow process, etc., can all be collected and enter the liquid collecting tank, greatly reducing the probability of liquid overflowing to the outside of the pot lid and enhancing the anti-overflow effect. The setting of the liquid discharge hole can discharge the liquid in the liquid collecting tank, avoiding the generation of peculiar smell and bacteria due to long-term storage of the liquid. The setting of the flow-discharging component provides various possibilities for the opening and closing control of the liquid discharge hole. For example, by closing the liquid discharge hole, the micro-pressure environment in the cooking cavity during the cooking process can be maintained, keeping the stability of the cooking environment. Another example is that by closing the liquid discharge hole, the backflow of steam and liquid during the cooking process can be avoided, preventing the food from being affected by excessive moisture and affecting the decomposition and taste of the food. Another example is that by opening the liquid discharge hole, the liquid can flow back during the heat preservation and moisture retention stage, which helps to tenderize the food, etc. The opening and closing control of the liquid discharge hole is realized through the flow-discharging component to adapt to different cooking requirements.

[0020] 3. As a preferred embodiment of the present application, the valve seat is provided with an air inlet cylinder extending towards the exhaust cavity. The inside of the air inlet cylinder is hollow to form an air inlet channel. The design of the air inlet cylinder can not only guide the steam to enter the exhaust cavity more smoothly, improving the air inlet efficiency, but also extend the flow path of the steam from the cooking cavity to the exhaust cavity, increasing the frictional resistance loss along the way of the steam, thereby contributing to preventing overflow. In addition, the extensibility of the air inlet cylinder enables its inner wall to fully impact the steam and the rice-water mixture entering it, which is more conducive to bubble bursting and further improves the anti-overflow effect.

[0021] The micro-pressure member is sleeved outside the air inlet cylinder. The micro-pressure member includes a top cover and a side plate. The side plate can abut against the liquid storage tank to form a micro-pressure cooking environment in the cooking cavity. The design of the top cover and the side plate enables them to cooperate with each other and perform their respective functions. On the one hand, the top cover can face the air inlet channel directly, so that when the pressure in the cooking cavity reaches a certain value, the micro-pressure member can relatively easily move upward under the action of steam to reach the second exhaust state and relieve pressure. During the movement of the top cover, it can synchronously drive the side plate to move to release the first exhaust state between the side plate and the liquid storage tank, preventing the micro-pressure member from being adsorbed on the upper surface of the valve seat. On the other hand, the connection between the top cover and the side plate can achieve the diversion of steam. The steam and the rice-water mixture surging during the cooking process can flow along the top cover and the side plate to be diverted to the liquid storage tank, which helps to form a water seal between the side plate and the liquid storage tank, simplifies the sealing design between them, and during the process of switching to the second exhaust state, the water seal state is easier to be broken compared with other sealing designs, which is beneficial to the realization of pressure relief.

[0022] 4. As a preferred embodiment of the present application, the valve seat is provided with an air inlet cylinder extending towards the exhaust cavity. The inside of the air inlet cylinder is hollow to form an air inlet channel. The air inlet cylinder has a top opening and a side notch respectively communicating with the air inlet channel. The setting of the side notch helps to improve the exhaust efficiency and thus the pressure relief efficiency in the second exhaust state, and helps to improve the liquid collection efficiency in the first exhaust state, so that during the early stage of the cooking process and when the pressure in the cooking cavity drops to a certain value, it is beneficial to collect the liquid, facilitating the rapid accumulation of a certain amount of liquid in the liquid storage tank to achieve a water seal with the micro-pressure member.

[0023] 5. As a preferred embodiment of the present application, one of the micro-pressure member and the valve seat is provided with a guide hole, and the other is provided with a guide rod. Through the guiding cooperation of the guide hole and the guide rod, the movement of the micro-pressure member can be guided, realizing the smooth switching of the micro-pressure member between the second exhaust state and the first exhaust state, and enabling the micro-pressure member to maintain good working performance under different pressure states. Description of the Drawings

[0024] The accompanying drawings described herein are used to provide a further understanding of the present application and form a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation of the present application. In the drawings:

[0025] Figure 1 is a cross-sectional view of a pot lid under an embodiment of the present application;

[0026] Figure 2 is Figure 1 an enlarged view of part A of , which mainly shows the schematic diagram when the micro-pressure component is in the first exhaust state;

[0027] Figure 3 is a schematic structural diagram of a valve seat under an embodiment of the present application;

[0028] Figure 4 is a schematic structural diagram of a micro-pressure component under an embodiment of the present application;

[0029] Figure 5 is an exploded view of an inner lid and an exhaust valve assembly under an embodiment of the present application;

[0030] Figure 6 is an assembly schematic diagram of the inner lid and the exhaust valve assembly of the present application;

[0031] Figure 7 is Figure 6 an enlarged view of part B of , which mainly shows the schematic diagram when the micro-pressure component is in the second exhaust state.

[0032] Among them,

[0033] 1. Valve seat; 11. Air inlet cylinder; 111. Air inlet channel; 112. Top opening; 113. Side notch; 114. Guide rod; 12. Liquid storage tank; 13. Liquid collection tank; 14. Liquid discharge hole; 15. Mounting hole;

[0034] 2. Valve cover; 21. Exhaust channel;

[0035] 3. Exhaust cavity;

[0036] 4. Micro-pressure component; 41. Top cover; 411. Ventilation hole; 412. Guide hole; 42. Side plate; 421. Tip;

[0037] 5. Flow discharge component; 51. Sealing gasket; 52. Anti-disengagement part; 53. Connection part;

[0038] 6. Inner lid;

[0039] 7. Liner cover. Specific embodiments

[0040] To more clearly illustrate the overall concept of this application, the following will provide a detailed description 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 this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited by the specific embodiments disclosed below. It should be noted that, without conflict, the embodiments of this application and the features in each embodiment may be combined with each other.

[0042] In addition, in the description of this application, 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 this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0043] In this application, unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed broadly. 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, and may 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 this application may be understood according to specific circumstances.

[0044] In this application, unless otherwise clearly specified and defined, the first feature being "on" or "under" 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 "one embodiment", "some embodiments", "example", "specific example", or "some examples" 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 this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0045] Such as Figure 1 、 Figure 2 、 Figure 6 and Figure 7As shown in the figure, a low-pressure cooking appliance includes a pot lid. An exhaust valve assembly is provided on the pot lid. The exhaust valve assembly includes a valve seat 1 having an air inlet passage 111, a valve cover 2 having an exhaust passage 21, and an exhaust cavity 3 formed by the cooperation of the valve seat 1 and the valve cover 2. The valve seat 1 is provided with a liquid storage tank 12 arranged around the air inlet passage 111 and opening upward. The exhaust valve assembly further includes a low-pressure member 4. The low-pressure member 4 is movably arranged on the valve seat 1 to form a first exhaust state in contact with the liquid storage tank 12 and a second exhaust state separated from the liquid storage tank 12.

[0046] In this application, by providing the low-pressure member 4, during the cooking process of the cooking appliance, when the pressure in the cooking cavity is lower than the preset threshold, the low-pressure member 4 is in the first exhaust state in contact with the liquid storage tank 12, and the pressure in the cooking cavity can be maintained at the preset low-pressure state, achieving the effect of low-pressure cooking.

[0047] The low-pressure member 4 in this application is movably arranged on the valve seat 1 and can be switched between the second exhaust state and the first exhaust state under the action of the pressure in the cooking cavity of the cooking appliance. When the pressure in the cooking cavity of the cooking appliance is relatively high, the low-pressure member 4 is in the second exhaust state. By exhausting, the excessive pressure in the cooking cavity is avoided. During the exhaust process, since the fluid needs to overcome the obstruction of the low-pressure member 4 to be discharged, during the process of the surging fluid hitting the low-pressure member 4, not only can the flow rate of the fluid be reduced, its energy consumption loss be increased, and it can be prevented from directly overflowing, but also the bubbles entrained in the fluid can be broken, further improving the anti-overflow effect. The opening of the liquid storage tank 12 faces upward, facilitating the collection of condensed water in the exhaust cavity 3. Under normal pressure cooking, when cooking is nearly completed, and in the heat preservation state, the low-pressure member 4 is in the first exhaust state. Part of the steam generated in the cooking cavity condenses in the exhaust cavity 3 and accumulates in the liquid storage tank 12. The low-pressure member 4 is in contact with the liquid storage tank 12, avoiding the loss of heat and steam in the cooking cavity. During the cooking process, the reduction of heat loss can, on the one hand, improve the cooking efficiency, and on the other hand, contribute to the full decomposition and transformation of food, enhancing the cooking effect of food. In the heat preservation stage, the reduction of heat and steam loss helps to keep the food warm and lock in moisture, achieving the tenderization of food and the retention of flavor.

[0048] Furthermore, when the low-pressure member 4 is in the first exhaust state, the low-pressure member 4 is in contact with the liquid storage tank 12 to form a water seal effect, which helps to form a low-pressure environment in the cooking cavity. The low-pressure environment helps to make the heat distribution in the cooking cavity more uniform. It can not only improve the cooking efficiency and make the food cooking more uniform, but also in the low-pressure environment cooking, the fiber tissue of the food is easier to soften. For starchy foods, it is more likely to gelatinize in the low-pressure environment, which is more conducive to the action of amylase and enhances the cooking effect of food. In addition, in the low-pressure environment, the loss of nutrients in the food can be reduced, maintaining the original flavor and taste of the food and enhancing the user experience.

[0049] As a preferred embodiment of the present application, as Figure 2 and Figure 3 shown, the liquid storage tank 12 is formed by the local area of the upper surface of the valve seat 1 being recessed. By providing the liquid storage tank 12 with a relatively small surface area, it is easy to achieve the accumulation of liquid, thus facilitating the formation of a water seal between the liquid storage tank 12 and the micro-pressure member 4.

[0050] As a preferred embodiment of the present application, as Figure 2 and Figure 3 shown, the valve seat 1 is further provided with a liquid collection tank 13 communicating with the liquid storage tank 12 and a liquid discharge hole 14 communicating with the liquid collection tank 13. The valve seat 1 is also provided with a flow discharge member 5. The flow discharge member 5 is movably arranged on the valve seat 1 to have a flow discharge state of opening the liquid discharge hole 14 and a blocking state of closing the liquid discharge hole 14. The liquid condensed from the steam in the exhaust cavity 3, as well as the liquid entering the exhaust cavity 3 during the anti-overflow process, etc. can all be collected and enter the liquid collection tank 13, greatly reducing the probability of liquid overflowing to the outside of the pot lid and improving the anti-overflow effect. The setting of the liquid discharge hole 14 can discharge the liquid in the liquid collection tank 13 to avoid the generation of peculiar smell and bacteria due to long-term storage of liquid. The setting of the flow discharge member 5 provides various possibilities for the opening and closing control of the liquid discharge hole 14. For example, by closing the liquid discharge hole 14, the micro-pressure environment in the cooking cavity during the cooking process can be maintained, and the stability of the cooking environment can be maintained. Also, by closing the liquid discharge hole 14, the reflux of steam and liquid during the cooking process can be avoided, and the food can be prevented from being affected by excessive moisture in terms of decomposition and taste. Again, by opening the liquid discharge hole 14, the reflux of liquid can be achieved during the heat preservation and moisture retention stage, which helps to tenderize the food. The opening and closing control of the liquid discharge hole 14 is realized through the flow discharge member 5 to meet different cooking requirements.

[0051] This embodiment does not limit the driving method of the flow discharge member 5, and it can adopt any one of the following embodiments:

[0052] Embodiment 1: The flow discharge member 5 floats under the pressure in the cooking cavity to switch to the blocking state. That is, when the pressure in the cooking cavity reaches the preset threshold, the flow discharge member 5 moves upward under the pressure to close the liquid discharge hole 14. When the pressure in the cooking cavity drops to a level that is not sufficient to overcome the gravity of the pressure relief member and the gravity of the liquid in the liquid collection tank 13, the flow discharge member 5 moves downward to open the liquid discharge hole 14.

[0053] Embodiment 2: The movement of the flow discharge member 5 is realized manually. Before cooking, the flow discharge member 5 can be manually pushed to move it to the blocking state of closing the liquid discharge hole 14. After cooking, the flow discharge member 5 is manually pulled to open the liquid discharge hole 14.

[0054] Embodiment 3: A driving member for driving the drain member 5 to move is provided on the pot lid. The drain member 5 is driven by the driving member to move, so as to realize the switching between the drain state and the blocking state. For example, an electromagnetic push rod is provided on the pot lid, and the drain member 5 is driven by the electromagnetic push rod to move horizontally to realize the state switching of the drain member 5.

[0055] As a preferred embodiment of this embodiment, as Figures 1 to 3 shown, the liquid storage tank 12 is communicated with the liquid collection tank 13, and the height of the bottom surface of the liquid storage tank 12 is lower than the height of the bottom surface of the liquid collection tank 13. With such a setting, the condensed water in the exhaust cavity 3 can be preferentially accumulated in the liquid storage tank 12, which is convenient for a water seal to be formed between the liquid storage tank 12 and the micro-pressure member 4 in a relatively short time, thereby helping to quickly form a micro-pressure cooking environment and improving the cooking efficiency and cooking effect.

[0056] As a preferred embodiment of this embodiment, as Figure 3 shown, the valve seat 1 is provided with a plurality of liquid discharge holes 14. The drain member 5 includes a sealing gasket 51, an anti-disengagement portion 52, and a connecting portion 53 connecting the sealing gasket 51 and the anti-disengagement portion 52. The valve seat 1 is provided with a mounting hole 15 adapted to the connecting portion 53. The drain member 5 floats up and down to open or close the liquid discharge holes 14 through the sealing gasket 51. By providing a plurality of liquid discharge holes 14, the phenomenon of unable to drain due to the blockage of a single liquid discharge hole 14 can be avoided. Moreover, the plurality of liquid discharge holes 14 can work simultaneously, accelerating the liquid discharge speed and improving the liquid discharge efficiency. The way that the drain member 5 floats up and down has a simple structural design and is easy to implement. The configuration of the sealing gasket 51 can improve the sealing fit between the drain member 5 and the valve seat 1 in the blocking state, avoiding the overflow of steam through the fitting gap between the drain member 5 and the valve seat 1, and effectively ensuring the micro-pressure cooking state in the cooking cavity. In one example, the drain member 5 is made of an elastic material by itself, so that it can form a sealing gasket 51 structure capable of realizing sealing. In another example, the drain member 5 is made of a material with a certain hardness by itself, and a sealing gasket 51 made of a flexible material is sleeved at its bottom.

[0057] As a preferred embodiment of this application, as Figure 2As shown in the figure, the valve seat 1 is provided with an air inlet cylinder 11 extending towards the exhaust cavity 3. The inside of the air inlet cylinder 11 is hollow to form an air inlet passage 111. The micro-pressure member 4 includes a top cover 41 and a side plate 42 connected to the top cover 41 and extending downward. In the first exhaust state, the side plate 42 abuts against the liquid storage tank 12. The design of the air inlet cylinder 11 can not only guide the steam to enter the exhaust cavity 3 more smoothly, improving the air inlet efficiency, but also extend the flow path of the steam from the cooking cavity to the exhaust cavity 3, increasing the frictional resistance loss of the steam along the way, thus contributing to preventing overflow. In addition, the extensibility of the air inlet cylinder 11 enables its inner wall to fully impact the steam and the rice-water mixture entering it, which is more conducive to bubble breaking and further improves the anti-overflow effect. The design of the top cover 41 and the side plate 42 enables them to cooperate with each other and perform their respective functions. On the one hand, the top cover 41 can face the air inlet passage 111 directly, so that when the pressure in the cooking cavity reaches a certain value, the micro-pressure member 4 can relatively easily move upward under the action of the steam to reach the second exhaust state for pressure relief. And during the movement of the top cover 41, the side plate 42 can be driven to move synchronously to release the first exhaust state between the side plate 42 and the liquid storage tank 12, preventing the micro-pressure member 4 from being adsorbed on the upper surface of the valve seat 1. On the other hand, the connection between the top cover 41 and the side plate 42 can achieve the diversion of the steam. The steam and the rice-water mixture surging during the cooking process can flow along the top cover 41 and the side plate 42 to be diverted to the liquid storage tank 12, which helps to form a water seal between the side plate 42 and the liquid storage tank 12, simplifying the sealing design between them. And during the switching to the second exhaust state, the water seal state is easier to be broken compared with other sealing designs, which is beneficial to the realization of pressure relief.

[0058] In this embodiment, the design of the top cover can adopt any one of the following embodiments:

[0059] Embodiment 4: The top cover is a closed cover body without ventilation holes. Without ventilation holes on the top cover, in the first exhaust state, the micro-pressure member 4 abuts against the liquid storage tank 12 for sealing, so that the micro-pressure state in the cooking cavity can be relatively easily maintained to achieve micro-pressure cooking. That is, in this Embodiment 4, the first exhaust state is the sealed state where the micro-pressure member 4 abuts against the liquid storage tank 12 for sealing.

[0060] Embodiment 5: As Figure 4As shown, the top cover 41 is provided with a vent hole 411 that connects the intake passage 111 and the exhaust chamber 3. The setting of the vent hole 411 can keep the cooking chamber connected to the outside, thus avoiding the phenomenon that the pot lid is sucked to the pot under the action of the external atmospheric pressure when opening the lid, which is convenient for the user to open the pot lid. However, in the fifth embodiment, setting the vent hole 411 on the top cover 41 is not contradictory to the micro-pressure cooking. By reducing the cross-sectional area of the vent hole 411, the exhaust obstruction can be achieved, and combined with the exhaust path setting in the exhaust valve assembly, the obstruction effect can be further enhanced, so that the micro-pressure cooking can also be realized. That is, compared with the fourth embodiment, in the fifth embodiment, the first exhaust state is a small exhaust volume state.

[0061] In this embodiment, the specific abutting position of the side plate 42 and the liquid storage tank 12 is not limited, and any one of the following embodiments can be adopted:

[0062] Embodiment 6: In the first exhaust state, the side wall of the side plate abuts against the inner wall of the liquid storage tank.

[0063] Embodiment 7: In the first exhaust state, the bottom of the side plate abuts against the bottom wall of the liquid storage tank, and the bottom of the side plate and the bottom wall of the liquid storage tank are in planar contact.

[0064] Embodiment 8: As Figure 2 shown, in the first exhaust state, the bottom of the side plate 42 abuts against the bottom wall of the liquid storage tank 12, and at least one of the bottom of the side plate 42 and the bottom wall of the liquid storage tank 12 is provided with a tip 421 for reducing the contact area between the two. Through the tip 421, the contact area between the bottom of the side plate 42 and the bottom wall of the liquid storage tank 12 in the first exhaust state is reduced, the adsorption force between the side plate 42 and the liquid storage tank 12 is reduced, so that the side plate 42 can smoothly move upward under the action of steam to switch from the first exhaust state to the second exhaust state.

[0065] In this embodiment, the design of the intake cylinder can adopt any one of the following embodiments:

[0066] Embodiment 9: The intake cylinder has a top opening. In the second exhaust state, the top opening connects the intake passage 111 and the exhaust passage 21 to achieve exhaust pressure relief. For Embodiment 9, the second exhaust state is the state where the top opening is opened, thus opening the intake passage 111.

[0067] Embodiment 10: As Figure 3 and Figure 7As shown, the air intake cylinder 11 has a top opening 112 and a side notch 113, and both the top opening 112 and the side notch 113 communicate with the air intake passage 111. By adding the side notch 113, the exhaust efficiency can be improved and the anti-overflow effect can be enhanced in the second exhaust state. In addition, the setting of the side notch 113 helps to collect the rice-water mixture and condensate, so that the liquid amount that can seal the micro-pressure part 4 can be stored relatively early in the liquid storage tank 12, thereby shortening the time from the beginning of cooking to micro-pressure cooking. For Embodiment 10, the second exhaust state can be either a state where both the top opening 112 and the side notch 113 are opened, so that the entire air intake passage 111 is opened, or a state where only the side notch 113 is opened while the top opening 112 is still blocked by the micro-pressure part when the pressure in the cooking cavity does not reach the preset threshold, so that the air intake passage 111 is in a partially opened state.

[0068] As a preferred embodiment of the present application, as Figure 2 , Figure 3 , Figure 4 , Figure 6 and Figure 7 shown, the micro-pressure part 4 floats up and down to switch between the second exhaust state and the first exhaust state. The exhaust valve assembly further includes a guiding structure for guiding the floating of the micro-pressure part 4. The guiding structure includes a guiding hole 412 provided on one of the micro-pressure part 4 and the valve seat 1, and a guiding rod 114 provided on the other of the two. Through the guiding cooperation of the guiding hole 412 and the guiding rod 114, the movement of the micro-pressure part 4 can be guided, and the smooth switching of the micro-pressure part 4 between the second exhaust state and the first exhaust state can be realized, so that the micro-pressure part 4 can maintain good working performance under different pressure states.

[0069] In a specific embodiment, as Figure 2 and Figure 7 shown, the guiding hole 412 is provided on the top cover 41 of the micro-pressure part 4. The guiding rod 114 is fixedly connected to the air intake cylinder 11 and extends upward. The guiding rod 114 is inserted into the guiding hole 412 to provide guidance during the floating process of the micro-pressure part 4. Preferably, the length of the guiding rod 114 extending upward is greater than the floating stroke of the micro-pressure part 4.

[0070] In another embodiment, the side plate of the micro-pressure part is provided with a laterally protruding guiding block, and the guiding block is provided with a guiding hole. One side of the air intake cylinder is provided with a laterally protruding L-shaped guiding rod, and the guiding rod is inserted into the guiding hole to provide guidance during the floating process of the micro-pressure part.

[0071] As a preferred embodiment of the present application, as Figure 1 , Figure 5 and Figure 6As shown, the pot lid includes a lining lid 7 and an inner lid 6 detachably mounted on the lining lid 7. The exhaust valve assembly is mounted on the inner lid 6, and the valve seat 1 is detachably connected to the valve cover 2. The inner lid 6 can be detached from the lining lid 7, facilitating the user to clean the inner lid 6 after detachment. The exhaust valve assembly is mounted on the inner lid 6, enabling the exhaust valve assembly to be synchronously detached when the inner lid 6 is detached. The valve seat 1 and the valve cover 2 are detachably connected, allowing the user to further detach the valve cover 2 from the valve seat 1 after the exhaust valve assembly is detached with the inner lid 6, so as to thoroughly clean the inside of the exhaust cavity 3 and avoid dirt and bacteria breeding inside the valve seat 1.

[0072] In this embodiment, the detachable connection manner between the valve seat 1 and the valve cover 2 is not limited, and it can adopt ways such as threaded connection, screw connection, snap connection or magnetic attraction cooperation.

[0073] What is not described in this application can be achieved by adopting or referring to the existing technology.

[0074] Each embodiment in this specification is described in a progressive manner. The same or similar parts among the embodiments can be referred to each other, and the key points of each embodiment are the differences from other embodiments.

[0075] The above are only the embodiments of this application and are not used to limit this application. For those skilled in the art, various changes and modifications can be made to this application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the scope of the claims of this application.

Claims

1. A micro-pressure cooking device, comprising a pot cover, wherein the pot cover is provided with an exhaust valve assembly, wherein the exhaust valve assembly comprises a valve seat having an air inlet passage, a valve cover having an exhaust passage, and an exhaust cavity formed by the valve seat and the valve cover, wherein: The valve seat is provided with a liquid storage tank which is arranged around the air inlet passage and opens upward. The exhaust valve assembly also includes a micro-pressure piece which is movably arranged on the valve seat to form a first exhaust state which is in contact with the liquid storage tank and a second exhaust state which is separated from the liquid storage tank.

2. A micro-pressure cooking device according to claim 1, characterized in that: The valve seat is also provided with a liquid collecting groove connected to the liquid storage tank and a liquid discharge hole connected to the liquid collecting groove. The valve seat is also provided with a flow discharge member, which is movably arranged on the valve seat to have a flow discharge state of opening the liquid discharge hole and a blocking state of closing the liquid discharge hole.

3. A micro-pressure cooking device according to claim 2, characterized in that: The liquid storage tank is communicated with the liquid collecting tank, and the bottom surface of the liquid storage tank is located at a lower height than the bottom surface of the liquid collecting tank.

4. A micro-pressure cooking device according to claim 2, characterized in that: The valve seat is provided with a plurality of drainage holes, the leakage part includes a sealing gasket, an anti-detachment part and a connecting part connecting the sealing gasket and the anti-detachment part, the valve seat is provided with a mounting hole adapted to the connecting part, and the leakage part floats up and down to open or close the drainage hole through the sealing gasket.

5. The micro-pressure cooking device according to claim 1, characterized in that: The valve seat is provided with an air intake cylinder extending toward the exhaust chamber, and the interior of the air intake cylinder is hollow to form the air intake channel; the micro-pressure component includes a top cover and a side plate connected to the top cover and extending downward, and in the first exhaust state, the side plate abuts against the liquid storage tank.

6. A micro-pressure cooking device according to claim 5, characterized in that: The top cover is provided with a vent hole communicating with the air inlet passage and the exhaust cavity.

7. The micro-pressure cooking device according to claim 5, characterized in that: In the first exhaust state, the bottom of the side plate abuts against the bottom wall of the liquid storage tank, and at least one of the bottom of the side plate and the bottom wall of the liquid storage tank is provided with a tip for reducing the contact area between the two.

8. The micro-pressure cooking device according to claim 5, characterized in that: The air intake cylinder has a top opening and a side notch, and both the top opening and the side notch are communicated with the air intake passage.

9. The micro-pressure cooking device according to claim 1, characterized in that: The micro-pressure member floats up and down to switch between the first exhaust state and the second exhaust state. The exhaust valve assembly also includes a guide structure for guiding the micro-pressure member to float. The guide structure includes a guide hole provided on one of the micro-pressure member and the valve seat, and a guide rod provided on the other of the two.

10. A micro-pressure cooking device according to any one of claims 1 to 9, characterized in that: The pot cover comprises a lining cover and an inner cover detachably mounted on the lining cover, the exhaust valve assembly is mounted on the inner cover, and the valve seat is detachably connected to the valve cover.

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