Water-cooling pot cover assembly and pressure cooking utensil

Abstract

The pot cover assembly comprises a cover body and an inner cover located below the cover body, the cover body is provided with a cooling piece, the cooling piece comprises a communicating pipe and a cooling part, at least part of the area of the cooling part penetrates through the inner cover to extend to the position below the inner cover, and the communicating pipe is provided with a water inlet and a water outlet. Blocking ribs are arranged in the cooling part to form a water inlet cavity and a water return cavity in the cooling part, the water inlet communicates with the water inlet cavity, and the water outlet communicates with the water return cavity. The communication pipe is provided with a water inlet and a water outlet, the water inlet function and the water outlet function of the cooling cavity are achieved at the same time through a single pipeline, the number of pipelines in the cooling cavity is reduced, the sealing difficulty is lowered, and meanwhile the complexity of pipeline connection is lowered. The blocking rib is located between the two cavities, the cooling liquid in the two cavities can be blocked, heat exchange of the cooling liquid in the two cavities is avoided to a large extent, and then the heat exchange efficiency of the cooling liquid and gas in the pot is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of kitchen appliances, and particularly relates to a water-cooled pot cover assembly and a pressure cooking appliance. Background Art

[0002] After pressure cooking, pressure cookers need to release the pressure to equalize the pressure inside the pot with the outside atmosphere before the lid can be opened safely. Traditional pressure cookers release pressure through venting, which is not only slow but also noisy. The venting process can also cause liquid in the pot to spray out, contaminating the lid and affecting the user experience.

[0003] Some pressure cooking appliances also use water cooling for pressure relief. Compared to exhaust, water cooling is faster and produces less noise during the process, making it increasingly popular. Cooking appliances that use water cooling for temperature and pressure reduction typically have a water-cooling chamber in the lid, which cools the pot by passing coolant through the chamber.

[0004] The water-cooling chamber is typically located on the inner cover, inside the inner cover, or formed by other components in conjunction with the inner cover. However, some cooking appliances feature a removable or rotatable inner cover. In this case, the water-cooling chamber can be removed or rotated along with the inner cover. Frequent connection and removal, as well as the movement of the water-cooling chamber and water-cooling piping, can compromise the sealability of the connection, posing a risk of coolant leakage.

[0005] Furthermore, the water-cooling chamber typically has two connecting pipes: one for the water inlet and the other for the water outlet. These two pipes need to be connected separately to the water tank, making assembly more difficult and increasing the risk of leaks due to poor sealing. Furthermore, the two pipes extending into the water-cooling chamber occupy a significant amount of space, significantly reducing the space available for coolant storage and affecting cooling efficiency.

[0006] Furthermore, during the water cooling process, there is both cold water that has just entered the water cooling chamber and hot water that has completed heat exchange in the water cooling chamber. Since the water cooling chamber is in a high temperature environment, the cold water begins to exchange heat with the hot water when it flows into the water cooling chamber from the water inlet pipe. At this time, the temperature difference between the coolant and the temperature in the pot is greatly reduced, and the heat exchange efficiency is very low. Utility Model Content

[0007] The utility model provides a water-cooled pot cover assembly and a pressure cooking appliance, which solve the problems of unstable connection and poor sealing between the water-cooling pipeline and the water-cooling chamber, and easy heat exchange between hot and cold water in the water-cooling chamber, which causes the temperature of the cold water to rise and affects the cooling efficiency.

[0008] The technical solution adopted by this utility model is:

[0009] A water-cooled pot cover assembly includes a cover body and an inner cover located below the cover body. The cover body is provided with a cooling member, which includes a connecting pipe and a cooling portion. At least a portion of the cooling portion passes through the inner cover to extend below the inner cover. The connecting pipe has a water inlet and a water outlet. A retaining rib is provided inside the cooling portion to form a water inlet cavity and a water return cavity inside the cooling portion. The water inlet is connected to the water inlet cavity, and the water outlet is connected to the water return cavity.

[0010] The water-cooled pot cover assembly of the utility model also has the following additional technical features:

[0011] The connecting pipe has a liquid inlet portion extending into the interior of the cooling part, the liquid inlet portion forms a retaining rib, the liquid inlet portion forms a water inlet cavity, a return water cavity is formed between the liquid inlet portion and the inner wall of the cooling part, and a connecting gap connecting the water inlet cavity and the return water cavity is provided between the lower end of the liquid inlet portion and the bottom wall of the cooling part.

[0012] The retaining rib is arranged on the communicating pipe and extends downward so that the water inlet cavity and the water return cavity are arranged transversely, and a communicating gap for communicating the water inlet cavity and the water return cavity is provided between the retaining rib and the bottom wall of the cooling portion.

[0013] The surface of the retaining rib is provided with a heat insulation layer.

[0014] The cooling portion comprises a flow guiding section, wherein the width of the lower end of the flow guiding section is smaller than the width of the upper end, so as to form a flow guiding transition surface on the outer surface of the flow guiding section.

[0015] The flow guide transition surface is provided with a texture structure.

[0016] The cooling portion further comprises a matching section located above the flow guiding section, and a flow blocking step is provided between the matching section and the flow guiding section.

[0017] The connecting pipe is arranged horizontally, the water inlet is opened at one end of the connecting pipe, and the water outlet is opened at the other end of the connecting pipe.

[0018] The cooling portion and the communicating pipe are detachably connected.

[0019] The utility model also discloses a pressure cooking appliance, comprising a pot body and the above-mentioned water-cooled pot cover assembly, wherein the inner cover cooperates with the pot body to form a cooking cavity, and at least a portion of the cooling portion extends into the cooking cavity; the pot body or the water-cooled pot cover assembly is further provided with a water tank and a water pump, and the water tank is connected to a connecting pipe.

[0020] Due to the adoption of the above technical solution, the beneficial effects achieved by the utility model are as follows:

[0021] 1. In the present invention, the cooling element is arranged on the cover body, so even if the inner cover can be rotated or disassembled relative to the cover body, the cover body will not move, thereby ensuring that the cooling element and the water-cooling pipe connected to the cooling element will not change position, thereby maintaining a stable connection and seal between the water-cooling pipe and the cooling cavity, thereby improving the reliability of the pipe connection. In addition, there is no need to dock the water-cooling pipe with the cooling cavity when installing the inner cover, which reduces the efficiency of assembly and disassembly of the inner cover and the convenience of operation, and improves the user experience. The water-cooling pipe can always remain connected to the cooling cavity, and there is no need to frequently connect the water-cooling pipe and the cooling cavity, thereby ensuring the sealing of the connection, further reducing the risk of water-cooling liquid leakage, and ensuring water cooling efficiency.

[0022] In addition, the connecting pipe of the utility model has a water inlet and a water outlet, so that the water inlet and water outlet functions of the cooling chamber can be realized simultaneously by using a single pipeline. On the one hand, it can reduce the number of pipelines in the cooling chamber and reduce the space occupied in the cooling chamber, so that more coolant can enter the cooling chamber and improve the cooling effect. On the other hand, it reduces the problem of poor sealing when multiple pipelines are connected. While reducing the difficulty of sealing, it also reduces the complexity of pipeline connection and improves assembly efficiency.

[0023] Furthermore, the retaining ribs inside the cooling chamber separate the interior of the cooling chamber into a water inlet chamber and a water return chamber. After the coolant with a lower temperature enters the water inlet chamber from the water inlet, the chamber is filled with the coolant with a lower temperature, which can then efficiently exchange heat with the air in the pot, thereby improving the cooling effect. As the coolant in the water inlet chamber heats up after heat exchange and gradually flows into the water return chamber, the coolant with a higher temperature converges in the water return chamber and flows out through the water outlet. The retaining ribs are located between the two chambers and can block the flow of the coolant in the two chambers, preventing excessive mixing of the liquids with a large temperature difference in the two chambers, and largely preventing heat exchange between the coolant in the two chambers, thereby ensuring the heat exchange efficiency between the coolant and the gas in the pot.

[0024] 2. As a preferred embodiment of the present invention, the connecting pipe includes a liquid inlet portion extending into the interior of the cooling unit. The liquid inlet portion forms a rib, enclosing a water inlet chamber. A return water chamber is formed between the liquid inlet portion and the inner wall of the cooling unit. A gap is defined between the lower end of the liquid inlet portion and the bottom wall of the cooling unit, connecting the water inlet chamber and the return water chamber. The return water chamber surrounds the outer periphery of the water inlet chamber. Coolant flows from the water inlet into the water inlet chamber, guided by the liquid inlet portion to the bottom of the cooling unit. From there, it flows around the cooling unit, enters the return water chamber, and ultimately exits through the outlet. Coolant entering the cooling unit flows directly into the bottom of the cooling unit, exchanging heat with the air inside the pot while simultaneously forcing the hotter coolant in the return water chamber upward and out of the outlet. This flow pattern results in more efficient heat exchange and higher cooling efficiency. Furthermore, the coolant diffuses from the bottom of the cooling unit to the surrounding area, exchanging heat with the hot air in various areas surrounding the cooling unit. This increases the contact area between the coolant and the air inside the pot, resulting in higher heat exchange efficiency.

[0025] 3. As a preferred embodiment of the present invention, a heat-insulating layer is provided on the surface of the retaining rib. This layer is located between the water inlet chamber and the water return chamber. When the coolant flows in the water inlet chamber, it further prevents excessive heat exchange between the coolant in the two chambers, preventing the higher-temperature coolant in the return chamber from transferring heat to the lower-temperature coolant in the water inlet chamber. This ensures a large temperature difference between the coolant and the air in the pot, thereby ensuring a cooling effect.

[0026] 4. As a preferred embodiment of the present invention, the cooling portion includes a guide section, the width of the lower end of the guide section is smaller than the width of the upper end, and the outer surface of the guide section forms a guide transition surface. Since the coolant flows inside the cooling portion, the temperature of the cooling portion is relatively low. The cooling portion extends into the pot and is in direct contact with the high-temperature environment. Therefore, after the high-temperature steam and gas come into contact with the cooling cavity, they will quickly liquefy to form condensed water and adhere to the outer surface of the cooling portion. The guide transition surface on the outer surface can make the condensed water on the outer surface of the cooling part quickly condense at the bottom end and drip in time. Water vapor is not easily retained on the guide transition surface, thereby preventing the accumulation of condensed water and food residues on the surface of the cooling portion, which will cause a decrease in heat exchange rate.

[0027] 5. As a preferred embodiment of the present invention, the cooling portion further includes a matching section located above the guide section, and a flow-blocking step is provided between the matching section and the guide section. Because the flow rate of the coolant is relatively fast under the action of power components such as a water pump, the residence time of the coolant in the cooling chamber is relatively short, the heat exchange time with the high-temperature gas in the pot is limited, and the amount of heat absorbed is limited. The provision of the flow-blocking step can increase the resistance of the coolant when it flows toward the water outlet, so that the coolant slows down its flow rate due to the obstruction of the flow-blocking step, and can then stay in the cooling chamber for a short time, thereby fully exchanging heat with the air in the pot, extending the heat exchange time, absorbing more heat, and improving the cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0029] Figure 1 This is an exploded view of the structure of a water-cooled pot cover assembly according to one embodiment of the present invention;

[0030] Figure 2 This is a cross-sectional view of a water-cooled pot cover assembly according to one embodiment of the present invention;

[0031] Figure 3 This is a cross-sectional view of a cooling element according to one embodiment of the present invention;

[0032] Figure 4 for Figure 3 A cross-sectional view of the middle connecting pipe;

[0033] Figure 5 for Figure 3 a cross-sectional view of the middle cooling section;

[0034] Figure 6 This is a front view of a cooling unit according to one embodiment of the present invention;

[0035] Figure 7 This is a cross-sectional view of a cooling element in another embodiment of the present invention.

[0036] in:

[0037] 1. Cover;

[0038] 2 inner cover; 21 through hole;

[0039] 3 cooling element; 31 connecting pipe; 311 water inlet; 312 water outlet; 313 first connecting portion; 32 cooling portion; 321 cooling cavity; 322 water inlet cavity; 323 water return cavity; 324 connecting gap; 325 second connecting portion; 326 flow guide transition surface; 3261 texture structure; 327 flow blocking step; 33 retaining rib; 331 liquid inlet; 34 thermal insulation layer;

[0040] 4 water tanks;

[0041] 5 water pumps. DETAILED DESCRIPTION

[0042] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in combination with the accompanying drawings by way of examples.

[0043] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0044] In addition, in the description of the present invention, it should be understood that the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 cannot be understood as a limitation on the present invention.

[0045] In this utility model, unless otherwise expressly specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0046] In the present invention, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "implementation method", "embodiment", "one embodiment", "example" or "specific example" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. 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 may be combined in an appropriate manner in any one or more embodiments or examples.

[0047] like Figure 1 、 Figure 2 、 Figure 3As shown, a water-cooled pot cover assembly includes a cover body 1 and an inner cover 2 located below the cover body 1. The cover body 1 is provided with a cooling member 3, and the cooling member 3 includes a connecting pipe 31 and a cooling portion 32. At least a portion of the cooling portion 32 passes through the inner cover 2 to extend below the inner cover 2. The connecting pipe 31 has a water inlet 311 and a water outlet 312. A retaining rib 33 is provided inside the cooling portion 32 to form a water inlet chamber 322 and a return water chamber 323 inside the cooling portion 32. The water inlet 311 is connected to the water inlet chamber 322, and the water outlet 312 is connected to the return water chamber 323.

[0048] By using water cooling to reduce the pressure, there is no need to open the exhaust valve to exhaust when releasing the pressure. While ensuring the pressure relief speed, the whistling sound of the air flow during exhaust is reduced, thereby reducing noise, and no liquid is sprayed out to cause pollution to the pot lid assembly, greatly improving the user experience.

[0049] In the present invention, the cooling element 3 is provided on the cover body 1, so even if the inner cover 2 can be rotated or disassembled relative to the cover body 1, the cover body 1 will not move, thereby ensuring that the cooling element 3 and the water-cooling pipeline connected to the cooling element 3 will not change position, thereby maintaining a stable connection and seal between the water-cooling pipeline and the cooling cavity 321, thereby improving the reliability of the pipeline connection. In addition, there is no need to dock the water-cooling pipeline with the cooling cavity 321 when installing the inner cover 2, which reduces the assembly and disassembly efficiency and operational convenience of the inner cover 2 and improves the user experience. The water-cooling pipeline can always remain connected to the cooling cavity 321, and there is no need to frequently connect the water-cooling pipeline and the cooling cavity 321, thereby ensuring the sealing of the connection, further reducing the risk of water-cooling liquid leakage, and ensuring water cooling efficiency.

[0050] In addition, the connecting pipe 31 of the present invention has a water inlet 311 and a water outlet 312, so that a single pipeline can simultaneously realize the water inlet and water outlet functions of the cooling chamber 321. On the one hand, it can reduce the number of pipelines in the cooling chamber 321 and reduce the space occupied in the cooling chamber 321, so that more coolant can enter the cooling chamber 321 and improve the cooling effect. On the other hand, it reduces the problem of poor sealing when multiple pipelines are connected, reduces the difficulty of sealing, and also reduces the complexity of pipeline connection, thereby improving assembly efficiency.

[0051] Furthermore, the retaining ribs 33 inside the cooling chamber 321 separate the interior of the cooling chamber 321 into a water inlet chamber 322 and a water return chamber 323. After the coolant with a lower temperature enters the water inlet chamber 322 from the water inlet 311, the chamber is filled with the coolant with a lower temperature, which can then efficiently exchange heat with the air in the pot, thereby improving the cooling effect. As the coolant in the water inlet chamber 322 heats up after heat exchange and gradually flows into the water return chamber 323, the coolant with a higher temperature converges in the water return chamber 323 and flows out through the water outlet 312. The retaining ribs 33 are located between the two chambers and can block the coolant in the two chambers, preventing excessive mixing of the liquids with a large temperature difference in the two chambers, and largely preventing heat exchange between the coolant in the two chambers, thereby ensuring the heat exchange efficiency between the coolant and the gas in the pot.

[0052] Preferably, the connecting pipe 31 is located above the cooling portion 32, closer to the lid 1, and conveniently connects to the pipes on the lid 1. The cooling portion 32 extends downward through the inner lid 2 into the cooking cavity. Preferably, the inner lid 2 is provided with a through hole 21 for the cooling element 3 to pass through, and a sealing ring is provided at the edge of the through hole 21 for abutting and sealing against the outer circumference of the cooling element 3.

[0053] Preferably, if Figure 2 As shown, the cooling element 3 is a rotating body to facilitate processing and manufacturing.

[0054] It should be noted that the present invention does not limit the location of the retaining rib 33. In one embodiment, the retaining rib 33 is disposed on the connecting pipe 31 and extends into the cooling chamber 321, cooperating with the inner wall of the cooling chamber 321 to form a connecting gap 324 connecting the water inlet chamber 322 and the water return chamber 323. In another embodiment, the retaining rib 33 is disposed on the inner wall of the cooling chamber 321, cooperating with the connecting pipe 31 or the inner wall of the cooling chamber 321 to form a connecting gap 324 connecting the water inlet chamber 322 and the water return chamber 323.

[0055] The present invention does not limit the arrangement of the water inlet chamber 322 and the water return chamber 323, which includes but is not limited to the following embodiments:

[0056] Implementation method 1: In this implementation method, Figure 3 As shown, the connecting pipe 31 has a liquid inlet portion 331 extending into the interior of the cooling portion 32, the liquid inlet portion 331 constitutes the retaining rib 33, the liquid inlet portion 331 surrounds a water inlet chamber 322, a return water chamber 323 is formed between the liquid inlet portion 331 and the inner wall of the cooling portion 32, and a connecting gap 324 connecting the water inlet chamber 322 and the return water chamber 323 is provided between the lower end of the liquid inlet portion 331 and the bottom wall of the cooling portion 32.

[0057] The return water chamber 323 surrounds the outer periphery of the water inlet chamber 322. Coolant flows from the water inlet 311 into the water inlet chamber 322 and, guided by the liquid inlet portion 331, reaches the bottom of the cooling chamber 321. From the bottom of the cooling chamber 321, it flows around the cooling chamber 321, enters the return water chamber 323, and is ultimately discharged from the water outlet 312. The coolant entering the cooling chamber 321 flows directly into the bottom of the cooling chamber 321. While exchanging heat with the air inside the pot, the coolant with a higher temperature in the return water chamber 323 is forced upward out of the water outlet 312. This flow pattern results in more complete heat exchange and higher cooling efficiency. Furthermore, the coolant diffuses from the bottom of the cooling chamber 321 to the surrounding area, allowing it to come into contact with the hot air in various areas around the cooling element 3 for heat exchange. This increases the contact area between the coolant and the air inside the pot, resulting in higher heat exchange efficiency.

[0058] Implementation method 2: In this implementation method, if Figure 7 As shown, the retaining rib 33 is arranged on the connecting pipe 31 and extends downward so that the water inlet chamber 322 and the return water chamber 323 are arranged horizontally, and a connecting gap 324 connecting the water inlet chamber 322 and the return water chamber 323 is provided between the retaining rib 33 and the bottom wall of the cooling portion 32.

[0059] The water inlet chamber 322 and the return water chamber 323 are arranged horizontally in parallel. The coolant with lower temperature flows into the water inlet chamber 322 on one side from the water inlet 311, is blocked by the retaining rib 33 and then flows downward to the bottom of the cooling chamber 321, then flows into the return water chamber 323 from the lower end of the retaining rib 33, and is finally discharged from the water outlet 312.

[0060] Regardless of the above-mentioned embodiment one or embodiment two, the connecting gap 324 is located at the bottom of the cooling chamber 321, and the water inlet 311 and the water outlet 312 are located above the cooling chamber 321, so that the coolant flows back and forth up and down in the cooling chamber 321. In the cooling chamber 321 with limited space, the flow path of the coolant is greatly extended, and the storage time of the coolant in the cooling chamber 321 is extended, so that it can fully contact and exchange heat with the air in the pot, thereby ensuring the heat exchange effect.

[0061] Of course, the water inlet chamber 322 and the water return chamber 323 may also be arranged in other ways, for example, the water inlet chamber 322 surrounds the outer periphery of the water return chamber 323, or the two are arranged up and down, etc., which is not limited here.

[0062] Preferably, if Figure 3 、 Figure 4 、 Figure 7 As shown, the connecting pipe 31 is arranged horizontally, the water inlet 311 is opened at one end of the connecting pipe 31 , and the water outlet 312 is opened at the other end of the connecting pipe 31 .

[0063] The connecting pipe 31 is arranged horizontally, with the retaining rib 33 extending downward between the water inlet 311 and the water outlet 312, giving the connecting pipe 31 an overall T-shaped structure. The horizontal arrangement of the water inlet 311 and the water outlet 312 simplifies and facilitates pipe connections, reduces the space occupied in the vertical direction, and contributes to the lightweight design of the pot lid assembly. This connecting pipe 31 structure also provides greater structural strength, facilitates processing, production, and transportation, and reduces the defect rate.

[0064] In a preferred embodiment of the present invention, Figure 3 、 Figure 7 As shown, a heat insulation layer 34 is provided on the surface of the retaining rib 33 .

[0065] The heat-insulating layer 34 is located between the water inlet chamber 322 and the water return chamber 323. When the coolant flows in the water inlet chamber 322, it further avoids excessive heat exchange between the coolant in the two chambers, and prevents the coolant with a higher temperature in the water return chamber 323 from transferring heat to the coolant with a lower temperature in the water inlet chamber 322, thereby ensuring a large temperature difference between the coolant and the air in the pot, thereby ensuring a cooling effect.

[0066] Specifically, the insulation layer 34 can be provided on the side of the retaining rib 33 facing the water inlet chamber 322 , or on the side of the retaining rib 33 facing the water return chamber 323 , or on both sides of the retaining rib 33 , which is not limited here.

[0067] As a preferred embodiment, Figure 3 、 Figure 5 、 Figure 6 As shown, the cooling portion 32 includes a flow guiding section, the width of the lower end of the flow guiding section is smaller than the width of the upper end, so as to form a flow guiding transition surface 326 on the outer surface of the flow guiding section.

[0068] The flow-guiding transition surface 326 not only cooperates with the through-hole 21 on the inner cover 2 to form a positioning, but also cooperates with the cooling element 3 through the through-hole 21 to accurately position the inner cover 2. Furthermore, since the coolant flows inside the cooling portion 32, the temperature of the cooling portion 32 is relatively low. However, the cooling portion 32 extends into the pot and is in direct contact with the high-temperature environment. Therefore, after the high-temperature steam and gas come into contact with the cooling cavity 321, they will quickly liquefy to form condensed water and adhere to the outer surface of the cooling portion 32. The flow-guiding transition surface 326 on the outer surface can make the condensed water on the outer surface of the cooling element 3 quickly condense at the bottom and drip in time. Water vapor is not easily retained on the flow-guiding transition surface 326, which prevents the accumulation of condensed water and food residues on the surface of the cooling portion 32, which will cause a decrease in heat exchange rate.

[0069] Preferably, if Figure 5 、 Figure 6As shown, the guide section is a conical structure, and the guide transition surface 326 can be an inclined surface, an arc surface, or other curved surface structures, etc., as long as it can guide the liquid on the outer surface of the cooling member 3 to flow downward to the lower end of the cooling member 3.

[0070] Furthermore, the flow-guiding transition surface 326 is provided with a textured structure 3261. This textured structure 3261 not only increases the heat exchange surface area between the cooling element 3 and the air in the pot, improving heat exchange efficiency, but also increases friction when gripping the cooling element 32, making it easier to grip and remove, and preventing slipping.

[0071] Specifically, the texture structure 3261 can be in any form, such as Figure 6 The cross lines shown may also be annular lines arranged at intervals, etc., which is not limited here.

[0072] Preferably, if Figure 3 、 Figure 5 As shown, the cooling portion 32 further includes a matching section located above the flow guiding section, and a flow blocking step 327 is provided between the matching section and the flow guiding section.

[0073] Because the coolant flows at a high velocity under the action of power components such as water pump 5, the coolant's residence time in cooling chamber 321 is short, resulting in a limited time for heat exchange with the high-temperature gas in the pot, and a limited amount of heat absorbed. The provision of flow-blocking step 327 increases resistance to the coolant's flow toward water outlet 312, slowing its flow rate due to the obstruction of flow-blocking step 327. This allows the coolant to briefly reside in cooling chamber 321, allowing it to fully exchange heat with the air in the pot, extending the heat exchange time, absorbing more heat, and improving the cooling effect.

[0074] It should be noted that the present invention does not limit the assembly method of the inner cover 2 and the cover body 1. The inner cover 2 can be a detachable structure so that the user can remove the inner cover 2 from the cover body 1 and clean it separately. Of course, the inner cover 2 can also be a non-detachable structure to improve structural stability and reduce the shaking of the inner cover 2.

[0075] Preferably, the cooling portion 32 and the connecting pipe 31 are detachably connected.

[0076] The connecting pipe 31 is connected to the water cooling pipeline. In order to ensure the sealing and stability of the pipeline connection, the connecting pipe 31 and the cover body 1 cannot be disassembled, and the cooling part 32 and the connecting pipe 31 are designed to be detachable. The cooling part 32 can be removed separately, and the surface of the cooling part 32 and the inside of the cooling cavity 321 can be cleaned to avoid the accumulation of impurities such as scale inside the cooling cavity 321, which affects the heat exchange efficiency.

[0077] Specifically, the connecting pipe 31 and the cooling part 32 are connected by threads to facilitate assembly and disassembly. Figure 4、 Figure 5 As shown, the connecting pipe 31 has a first connecting portion 313 extending downward, and the top of the cooling portion 32 has a second connecting portion 325, one of which is provided with an internal thread, and the other is provided with an external thread, so that the two are screwed together and fixed.

[0078] Of course, the two can also be fixed in other ways, such as snap connection, etc., which is not limited here.

[0079] The present utility model also discloses a pressure cooking appliance, comprising a pot body and the above-mentioned pot cover assembly, wherein the inner cover 2 cooperates with the pot body to form a cooking cavity, and at least a portion of the cooling portion 32 extends into the cooking cavity; the pot body or the water-cooled pot cover assembly is further provided with a water tank 4 and a water pump 5, and the water tank 4 is connected to the connecting pipe 31.

[0080] In one embodiment, the water tank 4 and / or the water pump 5 are provided on the pot body to make the pot cover assembly thinner and lighter, thereby improving the user's experience of opening and closing the cover. Figure 1 As shown, the water tank 4 and / or the water pump 5 are arranged on the pot cover assembly to shorten the length of the pipeline between it and the cooling cavity 321 and improve the water supply efficiency.

[0081] The present invention does not limit the assembly method of the lid assembly and the pot body. In a preferred embodiment, one end of the lid assembly is pivotally connected to the pot body, allowing the lid to be flipped up and down for opening and closing. If the water tank 4 and / or water pump 5 are provided on the lid assembly, they are preferably located near the connected end to reduce the lever arm and make opening and closing the lid more labor-efficient. If the water tank 4 and / or water pump 5 are provided on the pot body, the pipeline can pass through the connection between the lid assembly and the pot body.

[0082] In other embodiments, the pot cover assembly can also be a separate structure from the pot body, that is, the pot cover assembly can be removed from the pot body. In this case, if the water tank 4 is set on the pot body, coupling structures can be provided on the pot cover assembly and the pot body respectively to achieve docking or disconnection of the water channel on the pot cover assembly and the water channel on the pot body.

[0083] Anything not described in this utility model can be achieved by adopting or drawing on existing technologies.

[0084] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0085] The above description is merely an embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of the claims of the present invention.

Claims

1. A water-cooled pot cover assembly, comprising a cover body and an inner cover located below the cover body, characterized in that: The cover body is provided with a cooling part, which includes a connecting pipe and a cooling part. At least a part of the cooling part passes through the inner cover to extend to the bottom of the inner cover. The connecting pipe has a water inlet and a water outlet. The cooling part is internally provided with a retaining rib to form a water inlet cavity and a return water cavity inside the cooling part. The water inlet is connected to the water inlet cavity, and the water outlet is connected to the return water cavity.

2. The water-cooled pot cover assembly according to claim 1, characterized in that: The connecting pipe has a liquid inlet portion extending into the interior of the cooling part, the liquid inlet portion constitutes the retaining rib, the liquid inlet portion surrounds the water inlet cavity, the return water cavity is formed between the liquid inlet portion and the inner wall of the cooling part, and a connecting gap connecting the water inlet cavity and the return water cavity is provided between the lower end of the liquid inlet portion and the bottom wall of the cooling part.

3. The water-cooled pot cover assembly according to claim 1, characterized in that: The retaining rib is provided on the communicating pipe and extends downward so that the water inlet cavity and the water return cavity are arranged transversely, and a communication gap is provided between the retaining rib and the bottom wall of the cooling portion to connect the water inlet cavity and the water return cavity.

4. The water-cooled pot cover assembly according to claim 1, characterized in that: A heat insulation layer is provided on the surface of the retaining rib.

5. The water-cooled pot cover assembly according to claim 1, characterized in that: The cooling portion includes a flow guiding section, wherein the width of the lower end of the flow guiding section is smaller than the width of the upper end, so as to form a flow guiding transition surface on the outer surface of the flow guiding section.

6. The water-cooled pot cover assembly according to claim 5, characterized in that: The flow-guiding transition surface is provided with a texture structure.

7. The water-cooled pot cover assembly according to claim 5, characterized in that: The cooling portion further includes a matching section located above the flow guiding section, and a flow blocking step is provided between the matching section and the flow guiding section.

8. The water-cooled pot cover assembly according to claim 1, characterized in that: The connecting pipe is arranged horizontally, the water inlet is opened at one end of the connecting pipe, and the water outlet is opened at the other end of the connecting pipe.

9. The water-cooled pot cover assembly according to claim 1, characterized in that: The cooling portion and the connecting pipe are detachably connected.

10. A pressure cooking device comprising a pot, characterized in that: It also includes the water-cooled pot cover assembly according to any one of claims 1 to 9, wherein the inner cover cooperates with the pot body to form a cooking cavity, and at least a portion of the cooling part extends into the cooking cavity; the pot body or the water-cooled pot cover assembly is also provided with a water tank and a water pump, and the water tank is connected to the connecting pipe.

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