Water-cooling pressure cooking utensil

Abstract

The utility model discloses a water-cooling pressure cooking utensil which comprises a pot body and a pot cover, the pot body and the pot cover are matched to form a cooking cavity, the pot cover is provided with a water tank, a water pump and a cooling piece extending into the cooking cavity, a cooling cavity is formed in the cooling piece, the water tank is provided with a water outlet and a water return port which are communicated with the cooling cavity, and the pot cover is further provided with a vent valve. The vent valve comprises a valve body and a valve element arranged in the valve body, a communication channel is formed in the valve body, the cooling cavity is communicated with the water return opening through the communication channel, and the valve element can move under the action of the air pressure difference so that the communication channel can be communicated with the outside atmosphere. The valve element of the vent valve can move under the action of the air pressure difference between the cooling cavity and the external atmosphere, so that the communication channel is communicated with the outside, and the air pressure in the cooling cavity and the external atmosphere tend to be balanced again. And circulation of the cooling liquid in the water tank and the cooling cavity is stopped, so that the cooling liquid is prevented from continuously entering the cooling cavity to be continuously heated under the action of air pressure.

Description

Technical Field

[0001] This utility model belongs to the field of kitchen appliance technology, specifically relating to a water-cooled pressure cooking appliance. Background Technology

[0002] Some pressure cooking appliances release pressure by water cooling after pressure cooking. Water cooling releases pressure faster than traditional venting and release methods, and produces less noise during the process. Therefore, it is increasingly being used in pressure cooking appliances.

[0003] Cooking appliances that use water cooling for pressure relief typically have a water-cooling chamber in the lid. Cooling liquid is circulated through this chamber to lower the temperature and release pressure inside the pot. Pressure cooking appliances also have a water tank. When the water tank is installed, its outlet and return outlet are connected to the cooling chamber. Coolant flows from the outlet into the cooling chamber and then back into the water tank through the return outlet, creating a continuous circulation.

[0004] The cooling chamber comes into contact with the high-temperature air inside the boiler. Therefore, during the water-cooling depressurization process, the temperature inside the cooling chamber rises, causing the residual coolant inside to be continuously heated and generate steam. This increases the air pressure inside the cooling chamber, which in turn pushes the coolant in the pipe from the cooling chamber to the return port into the water tank. As the cooling chamber continues to be heated by the high-temperature air inside the boiler, the residual coolant inside is further heated, resulting in a continuous flow of steam into the water tank through the return port. This section of the pipe remains under high pressure (above atmospheric pressure).

[0005] However, after water cooling is complete, the remaining coolant in the cooling chamber evaporates, and the high-pressure steam in the pipes begins to cool down, causing the internal pressure to decrease until it falls below atmospheric pressure. When the pressure is below atmospheric pressure, the coolant in the pipes between the water tank outlet and the cooling chamber is forced into the cooling chamber by atmospheric pressure, undergoing a second evaporation or even boiling. This cycle continues, and the coolant in the water tank is heated by the hot steam formed by the residual coolant in the cooling chamber, affecting the water cooling efficiency or even causing it to lose its cooling effect. Furthermore, the noise from the boiling residual coolant in the cooling chamber continues throughout the cooking process, impacting the user experience. Utility Model Content

[0006] This invention provides a water-cooled pressure cooking appliance to solve the problems of prolonged boiling of coolant in the cooling chamber, continuous noise during cooking, and the negative pressure formed in the pipeline between the cooling chamber and the water tank return port after the coolant in the cooling chamber evaporates, which continuously draws coolant from the water tank into the cooling chamber through the outlet.

[0007] The technical solution adopted in this utility model is as follows:

[0008] A water-cooled pressure cooking appliance includes a pot body and a lid, which together form a cooking chamber. The lid is equipped with a water tank, a water pump, and a cooling component extending into the cooking chamber. The cooling component has a cooling chamber inside. The water tank is equipped with an outlet and a return outlet communicating with the cooling chamber. The lid is also equipped with a vent valve, which includes a valve body and a valve core disposed within the valve body. The valve body has a communication channel inside, through which the cooling chamber is connected to the return outlet. The valve core can move under negative pressure in the cooling chamber to allow the communication channel to communicate with the outside atmosphere.

[0009] The water-cooled pressure cooking appliance of this utility model also has the following additional technical features:

[0010] The valve body has a vent that connects to the communication channel. The valve core is positioned at the vent to seal it. The valve core can move toward the inside of the communication channel under the negative pressure suction in the communication channel to open the vent.

[0011] A water outlet switch is provided at the water outlet. The water outlet switch has a first sealing part that seals the water outlet. The water outlet switch can move away from the water tank under the suction of the water pump to open the water outlet.

[0012] The valve core includes a second sealing part and an elastic reset member. The water outlet switch also has a first elastic part. The elastic modulus of the elastic reset member is less than that of the first elastic part.

[0013] A sealing element is also provided at the water outlet. The sealing element can move relative to the water tank to open or close the water outlet. The water outlet switch is located on the sealing element.

[0014] A return water switch is installed at the return water inlet. The return water switch has a third sealing part, which seals the return water inlet. The return water switch can move close to the water tank under the push of the water flow to open the return water inlet.

[0015] The valve body has a vent that connects to the communication channel. The valve core is located at the vent to seal the vent. The valve body has a surrounding rib that forms a water outlet channel within the communication channel. The water outlet channel is connected to the return water port. The lower edge of the surrounding rib is lower than the lower edge of the vent.

[0016] The top surface of the pot lid is provided with a mounting position, and the water tank is detachably installed in the mounting position, with the water tank extending to the edge of the pot lid, such that the side of the water tank constitutes at least a portion of the exterior surface of the side of the pot lid, and the top surface of the water tank constitutes at least a portion of the exterior surface of the top of the pot lid.

[0017] The pot lid is equipped with an exhaust component, and the water tank has a water storage chamber and an exhaust chamber inside. The exhaust component is connected to the exhaust chamber, and the top surface of the water tank is provided with an exhaust port corresponding to the exhaust chamber. The water storage chamber surrounds at least a part of the exhaust chamber.

[0018] The pot lid includes a lid body and an inner lid. The inner lid and the pot body cooperate to form a cooking cavity. The cooling component is located on the lid body. The inner lid has a through hole through which the cooling component extends into the cooking cavity.

[0019] Due to the adoption of the above technical solution, the beneficial effects achieved by this utility model are as follows:

[0020] 1. In this invention, the cooling component extends into the cooking cavity. After the coolant enters the cooling chamber inside the cooling component, the cooling component directly contacts the high-temperature air inside the pot, resulting in higher heat exchange efficiency. This helps to improve the water cooling pressure reduction efficiency and shorten the pressure reduction time. The water tank is equipped with an outlet and a return outlet, both of which are connected to the cooling chamber. During water cooling, the coolant in the water tank flows into the cooling chamber through the outlet under the action of the water pump. After heat exchange, the coolant in the cooling chamber flows back into the water tank through the return outlet, thus circulating the coolant.

[0021] A vent valve is installed between the return port and the cooling chamber. The cooling chamber is connected to the return port through a connecting channel inside the valve body, and the valve core can move under negative pressure in the cooling chamber to connect the connecting channel with the outside atmosphere. During water cooling, the valve core isolates the connecting channel from the outside atmosphere, allowing the coolant in the cooling chamber to flow back to the return port through the connecting channel, thus completing the coolant return. When the coolant in the cooling chamber is heated, it generates steam, and the air pressure in the cooling chamber initially increases (higher than the outside atmospheric pressure). After water cooling is completed, the coolant gradually cools down, and the steam condenses, causing the air pressure to decrease (lower than the outside atmospheric pressure). At this time, the valve core can move under the negative pressure of the cooling chamber, connecting the connecting channel with the outside, realizing gas exchange, and allowing the air pressure in the cooling chamber to return to equilibrium with the outside atmosphere. This ensures that the flow of coolant between the water tank and the cooling chamber can be stopped in time after the water cooling stage is completed. This prevents the coolant from continuously entering the cooling chamber under air pressure and being continuously heated after the water cooling is completed. It avoids the coolant in the cooling chamber being heated for a long time, generating steam or even boiling and producing noise for a long time. It also ensures that the flow of coolant can start and stop in time, ensuring reliable water cooling and maintaining a high water cooling effect throughout the entire water cooling process.

[0022] 2. In a preferred embodiment of this utility model, the valve body has a vent for connecting the communication channel. The valve core is positioned at the vent to seal it. The valve core can move towards the interior of the communication channel under negative pressure suction to open the vent. During water cooling, the coolant in the cooling chamber vaporizes upon heating, forming steam. This increases the pressure inside the cooling chamber, making it higher than the external atmospheric pressure. Under this high pressure, the residual coolant in the cooling chamber is forced to flow towards the return port. Simultaneously, the high pressure acts on the valve core to firmly seal the vent, isolating the communication channel from the external atmosphere and preventing coolant leakage to the outside. Therefore, it further facilitates the return of residual coolant in the cooling chamber to the water tank, reducing coolant residue in the cooling chamber. After water cooling is completed and the coolant in the cooling chamber has evaporated, the temperature and air pressure in the pipe between the cooling chamber and the return port decrease, thus falling below the outside atmospheric pressure. At this time, the valve core moves under the negative pressure suction to open the vent, connecting the connecting channel with the outside atmosphere. At this time, outside air enters the connecting channel, balancing the internal and external air pressures, thereby reducing the suction effect of the cooling chamber on the water tank outlet, preventing the coolant in the water tank from continuing to flow into the cooling chamber.

[0023] 3. In a preferred embodiment of this utility model, a water outlet switch is provided at the water outlet. The water outlet switch has a first sealing part that seals the water outlet. The water outlet switch can move away from the water tank under the suction of the water pump to open the water outlet. When the water tank is installed on a pressure cooking appliance, the first sealing part of the water outlet switch seals the water outlet, preventing it from communicating with the cooling chamber. Only when the water pump is turned on will the water outlet switch be moved by the negative pressure generated by the water pump, thus keeping the water outlet in a normally closed state. It is only open when the water pump is working, that is, when the water cooling function is activated, so that the coolant in the water tank is always isolated from the outside environment and is not easily contaminated. At the same time, when the water cooling ends, the water pump stops working, and the water outlet returns to a closed state, thereby further preventing the coolant in the water tank from continuously flowing into the cooling chamber through the water outlet after the water cooling is finished.

[0024] 4. In a preferred embodiment of this utility model, a return water switch is provided at the return water inlet. The return water switch has a third sealing part that seals the return water inlet. The return water switch can move closer to the water tank under the driving force of the water flow to open the return water inlet. In this embodiment, the return water inlet is also normally closed. When the water tank is installed on the pressure cooking appliance, there is no coolant flow between the water tank and the cooling chamber. The return water switch blocks the return water inlet, preventing the coolant in the water tank from flowing back into the cooling chamber through the return water inlet. Only when the water cooling function is activated, the water pump starts working, drawing the coolant in the water tank from the outlet into the cooling chamber. Then, as the coolant flows towards the return water inlet, it pushes the return water switch to open the return water inlet, completing the return flow. When there is no coolant or very little coolant in the cooling chamber, it is insufficient to push the return water switch to move. At this time, the return water switch resumes its sealing of the return water inlet, further ensuring that the coolant in the water tank is always isolated from the outside environment and is not easily contaminated.

[0025] 5. In a preferred embodiment of this utility model, the top surface of the pot lid is provided with a mounting position, and the water tank is detachably mounted in the mounting position, extending to the edge of the pot lid, so that the side of the water tank constitutes at least a portion of the exterior surface of the side of the pot lid, and the top surface of the water tank constitutes at least a portion of the exterior surface of the top of the pot lid. When removing or placing the water tank, the user can simultaneously grasp the side and top surfaces of the water tank, applying force to the two mutually angled surfaces, making it easier for the user to apply force and more comfortable to operate. This allows the water tank to be easily removed from or installed in the mounting position, facilitating not only the installation and removal of the water tank. Moreover, in addition to the ease of gripping, the increased area of ​​the water tank also helps to reduce the height of the water tank, allowing the top surface of the water tank to not protrude excessively from the top surface of the pot lid, or even to make the top surface of the water tank flush with the top surface of the pot lid. This greatly reduces the height difference between the top of the water tank and the top of the pot lid, reduces the overall obtrusiveness of the pot lid, improves aesthetics and appearance quality, and reduces the overall volume of the pot lid in the height direction, which helps with miniaturization. Attached Figure Description

[0026] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0027] Figure 1 This is an exploded view of the pot lid structure according to one embodiment of the present invention;

[0028] Figure 2 This is a cross-sectional view of the pot lid structure according to one embodiment of the present invention;

[0029] Figure 3This is an exploded view of the structure of the vent valve according to one embodiment of the present invention;

[0030] Figure 4 This is a cross-sectional view of the vent valve according to one embodiment of the present invention;

[0031] Figure 5 This is an exploded view of the water tank structure according to one embodiment of the present invention;

[0032] Figure 6 This is a cross-sectional view of the pot lid structure according to one embodiment of the present invention;

[0033] Figure 7 for Figure 6 A magnified view of area A in the middle;

[0034] Figure 8 for Figure 6 A magnified view of area B in the middle;

[0035] Figure 9 This is a cross-sectional view of the pot lid structure from another perspective in one embodiment of this utility model.

[0036] in:

[0037] 1. Pot lid; 11. Lid body; 12. Inner lid; 13. Pressure relief valve; 14. Float valve;

[0038] 2 water pumps;

[0039] 3. Cooling components; 31. Cooling chamber;

[0040] 4. Water tank; 41. Water storage chamber; 42. Vent chamber; 421. Vent outlet; 43. Water outlet; 44. Water return outlet; 45. Water outlet switch; 451. Water outlet push rod; 452. First sealing part; 453. First elastic part; 46. Water return switch; 461. Third sealing part; 462. Second elastic part; 47. First mating slope; 48. Second mating slope;

[0041] 5. Vent valve; 51. Valve body; 511. Base; 512. Top cover; 52. Valve core; 521. Movable rod; 522. Second sealing part; 523. Elastic reset element; 53. Connecting channel; 531. Inlet; 532. Outlet; 533. Vent port; 534. Sealing slope; 54. Reinforcing rib; 541. Water outlet channel;

[0042] 6. Water pump base; 61. First filter screen;

[0043] 7. Return water base; 71. Second filter screen;

[0044] 8. Sealing components; 81. Sealing plugs; 811. Installation channels. Detailed Implementation

[0045] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0046] Many specific details are set forth in the following description in order to provide 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.

[0047] Furthermore, it should be understood in the description of this utility model that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0048] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0049] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "implementation," "example," "aspect," or "specific example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0050] like Figure 1As shown, a water-cooled pressure cooking appliance includes a pot body and a lid 1. The pot body and lid 1 cooperate to form a cooking chamber. The lid 1 is provided with a water tank 4, a water pump 2, and a cooling component 3 extending into the cooking chamber. The cooling component 3 has a cooling chamber 31 inside. The water tank 4 is provided with an outlet 43 and an inlet 44 communicating with the cooling chamber 31. The lid 1 is also provided with a vent valve 5. The vent valve 5 includes a valve body 51 and a valve core 52 disposed in the valve body 51. The valve body 51 has a connecting channel 53 inside. The cooling chamber 31 is connected to the inlet 44 through the connecting channel 53. The valve core 52 can move under negative pressure in the cooling chamber to allow the connecting channel 53 to communicate with the outside atmosphere.

[0051] It is understood that, in one specific embodiment, the coolant is water, and the user can directly add municipal tap water to the water tank 4 as coolant to save on user costs. Of course, the coolant can also be other liquid media, and this is not limited here.

[0052] In this utility model, such as Figure 2 As shown, the cooling component 3 extends into the cooking cavity. After the coolant enters the cooling chamber 31 inside the cooling component 3, the cooling component 3 directly contacts the high-temperature air inside the pot, resulting in higher heat exchange efficiency. This helps to improve the water cooling pressure reduction efficiency and shorten the pressure reduction time. The water tank 4 is equipped with an outlet 43 and a return outlet 44, both of which are connected to the cooling chamber 31. During water cooling, the coolant in the water tank 4 flows into the cooling chamber 31 through the outlet 43 under the action of the water pump 2. After heat exchange, the coolant in the cooling chamber 31 flows back into the water tank 4 through the return outlet 44, thus circulating the coolant.

[0053] A vent valve 5 is also installed between the return port 44 and the cooling chamber 31. The cooling chamber 31 is connected to the return port 44 through a connecting channel 53 inside the valve body 51, and the valve core 52 can move under the action of air pressure difference to connect the connecting channel 53 with the outside atmosphere. During water cooling, the valve core 52 isolates the connecting channel 53 from the outside atmosphere, and the coolant in the cooling chamber 31 can flow back to the return port 44 through the connecting channel 53, thus completing the coolant return. When the coolant in the cooling chamber 31 is heated and vaporized into steam, the air pressure in the cooling chamber 31, i.e., the connecting channel 53, first rises (higher than the outside atmospheric pressure). After water cooling is completed, the air pressure drops (lower than the outside atmospheric pressure) after the coolant has evaporated. At this time, the valve core 52 can move under the negative pressure of the cooling chamber 31, connecting the connecting channel 53 with the outside, so that the air pressure in the cooling chamber 31 and the outside atmosphere are back to equilibrium. This ensures that the flow of coolant between the water tank 4 and the cooling chamber 31 can be stopped in time after the water cooling stage is completed. This prevents the coolant from continuously entering the cooling chamber 31 under air pressure and being continuously heated after the water cooling is completed. This avoids the coolant in the cooling chamber 31 being continuously heated for a long time, generating steam or even boiling and producing noise for a long time. It also ensures that the flow of coolant can start and stop in time, ensuring reliable water cooling and maintaining a high water cooling effect throughout the entire water cooling process.

[0054] As a preferred embodiment of this utility model, such as Figure 3 , Figure 4 As shown, the valve body 51 has a vent 533 that connects to the connecting channel 53. The valve core 52 is located at the vent 533 to seal the vent 533. The valve core 52 can move toward the inside of the connecting channel 53 under the negative pressure suction in the connecting channel 53 to open the vent 533.

[0055] During the water cooling process, the coolant in the cooling chamber 31 vaporizes upon heating, forming steam. This increases the pressure inside the cooling chamber 31, making it higher than the external atmospheric pressure. Under this high pressure, the residual coolant in the cooling chamber 31 is forced to flow towards the return port 44. Simultaneously, the high pressure acts on the valve core 52, causing it to firmly seal the vent 533, isolating the connecting channel 53 from the outside atmosphere and preventing coolant from leaking to the outside through the vent 533. Therefore, this further facilitates the return of residual coolant in the cooling chamber 31 to the water tank 4, reducing the amount of coolant remaining in the cooling chamber 31.

[0056] After water cooling is completed, the residual coolant in the cooling chamber 31 is heated and evaporated. The high pressure state in the cooling chamber 31 and the connecting channel 53 will not continue to be maintained. At this time, the pressure decreases and a negative pressure is generated. After further cooling, the air pressure decreases further and will be less than the external atmospheric pressure. At this time, the valve core 52 moves under the suction of the negative pressure to open the vent 533, connecting the connecting channel 53 with the outside atmosphere. At this time, the outside air enters the interior of the connecting channel 53, so that the internal and external air pressures are balanced, thereby reducing the suction effect of the cooling chamber 31 on the outlet 43 of the water tank 4, so that the coolant in the water tank 4 will not continue to flow into the cooling chamber 31.

[0057] This design ensures that the valve core 52 can only open the vent 533 when the cooling chamber 31 is under negative pressure. When the cooling chamber 31 is under high pressure, the valve core 52 closes the vent 533. This helps the residual coolant in the cooling chamber 31 to flow back into the water tank 4 as much as possible, while preventing coolant from being forced out of the vent 533 due to air pressure under high pressure. When the vent 533 is open under negative pressure in the cooling chamber 31, outside air enters and hinders the outflow of internal coolant, thereby reducing the risk of coolant leakage and ensuring the cleanliness of the pressure cooking appliance.

[0058] Specifically, such as Figure 3 , Figure 4 , Figure 9 As shown, the valve body 51 includes a base 511 and a top cover 512. The base 511 is fixed to the pot lid 1, and the top cover 512 is sealed and fixed to the base 511, forming a communication channel 53 between the two. The vent 533 is opened at the top of the valve body 51. The valve core 52 is vertically arranged. The valve core 52 includes a movable rod 521, a second sealing part 522 disposed at the lower end of the movable rod 521, and an elastic reset member 523 sleeved on the outside of the movable rod 521 and located above the second sealing part 522. A sealing slope 534 is provided on the outer periphery of the vent 533. The second sealing part 522 abuts and seals with the sealing slope 534. When the communication channel 53 below is in a negative pressure environment, a downward suction force is formed on the movable rod 521, causing the movable rod 521 to drive the second sealing part 522 to move downward (inside the communication channel 53), causing the second sealing part 522 to disengage from the sealing slope 534 and open the vent 533. When the air pressure in the connecting channel 53 tends to be balanced with the external atmospheric pressure, the movable rod 521, under the elastic force of the elastic reset member 523, drives the second sealing part 522 to move upward and reset, and restores the sealing seal with the sealing slope 534.

[0059] Furthermore, such as Figure 4As shown, the valve body 51 has an inlet 531 and an outlet 532 that are connected to the communication channel 53. The inlet 531 is connected to the cooling chamber 31, and the outlet 532 is connected to the return water port 44. The inlet 531 is arranged horizontally, and the outlet 532 is located at the top of the valve body 51.

[0060] Preferably, such as Figure 4 As shown, the valve body 51 has a vent 533 connecting to the connecting channel 53. The valve core 52 is positioned at the vent 533 to seal it. A retaining rib 54 is provided inside the valve body 51, forming a water outlet channel 541 within the connecting channel 53. The water outlet channel 541 connects to the return water port 44. The lower edge of the retaining rib 54 is lower than the lower edge of the vent 533. Specifically, as... Figure 4 As shown, the vent 533 and the surrounding rib 54 are both located on the top wall of the valve body 51. The surrounding rib 54 extends downward. The distance between the surrounding rib 54 and the bottom wall of the connecting channel 53 is less than the distance between the vent 533 and the bottom wall of the connecting channel 53, so that the coolant in the connecting channel 53 can flow out to the return port 44 as much as possible, and avoid the coolant from accumulating in the connecting channel 53.

[0061] As a preferred embodiment of this utility model, such as Figure 5 , Figure 6 , Figure 7 As shown, a water outlet switch 45 is provided at the water outlet 43. The water outlet switch 45 has a first sealing part 452, which seals the water outlet 43. The water outlet switch 45 can move away from the water tank 4 under the suction action of the water pump 2 to open the water outlet 43.

[0062] When the water tank 4 is installed on the pressure cooking appliance, the first sealing part 452 of the water outlet switch 45 seals the water outlet 43, preventing it from communicating with the cooling chamber 31. Only when the water pump 2 is turned on will the water outlet switch 45 be moved by the negative pressure generated by the operation of the water pump 2, thus keeping the water outlet 43 in a normally closed state. It is only opened when the water pump 2 is working, that is, when the water cooling function is activated, so that the coolant in the water tank 4 is always isolated from the outside world and is not easily contaminated. At the same time, when the water cooling ends, the water pump 2 stops working, and the water outlet 43 returns to a closed state, thereby further preventing the coolant in the water tank 4 from continuously flowing into the cooling chamber 31 through the water outlet 43 after the water cooling is finished, so that the residual coolant will not be continuously heated in the cooling chamber 31.

[0063] Specifically, such as Figure 5 , Figure 6 , Figure 7As shown, the water outlet 43 is located on the bottom wall of the water tank 4. The water outlet switch 45 includes a water outlet push rod 451 and a first elastic part 453 sleeved on the outer periphery of the water outlet push rod 451. A first sealing part 452 is located at the lower end of the water outlet push rod 451 and is located outside the water outlet 43. The bottom wall of the water tank 4 also has a first mating inclined surface 47 on the outer periphery of the water outlet 43. The first sealing part 452 abuts against the first mating inclined surface 47 to seal the water outlet 43. When the water pump 2 starts working, it forms a suction force on the water outlet switch 45 towards the cooling chamber 31, causing the water outlet push rod 451 to drive the first sealing part 452 downward (towards the cooling chamber 31), causing the first sealing part 452 to disengage from the first mating inclined surface 47 and open the water outlet 43. When the water pump 2 stops working, the water outlet push rod 451, under the elastic force of the first elastic part 453, drives the first sealing part 452 to move upward and reset, and resumes the abutment seal with the first mating inclined surface 47.

[0064] Furthermore, such as Figure 7 As shown, a water suction seat 6 is also provided at the junction of the pot lid 1 or the pot body and the water outlet 43. The water suction seat 6 is equipped with a first filter screen 61 to prevent large impurities in the water tank 4 from entering the cooling chamber 31.

[0065] Preferably, such as Figure 4 , Figure 7 As shown, the valve core 52 includes a second sealing part 522 and an elastic reset member 523, and the water outlet switch 45 also has a first elastic part 453. The elastic modulus of the elastic reset member 523 is less than the elastic modulus of the first elastic part 453.

[0066] The elastic reset member 523 is used to control the opening and closing of the vent 533. Its elastic modulus determines the air pressure difference that allows the vent 533 to open. The first elastic member is used to control the opening and closing of the water outlet 43. Its elastic modulus determines the air pressure difference that allows the water outlet 43 to open. The elastic modulus of the elastic reset member 523 is less than that of the first elastic part 453, making the elastic reset member 523 more prone to deformation under the action of air pressure difference. When a negative pressure is generated in the water cooling pipeline, the second sealing part 522 first overcomes the elastic force of the elastic reset member 523 and begins to move, causing the vent 533 to be opened first. Outside air enters the connecting channel 53 to balance the air pressure. At this time, the water outlet 43 is still not open. Therefore, the coolant in the water tank 4 will not be sucked into the cooling chamber 31 by the negative pressure, and the residual coolant in the cooling chamber 31 will not be continuously heated.

[0067] Furthermore, such as Figure 5 As shown, a sealing element 8 is also provided at the water outlet 43. The sealing element 8 can move relative to the water tank 4 to open or close the water outlet 43. The water outlet switch 45 is provided at the sealing element 8.

[0068] The sealing element 8 is located at the water outlet 43, and can be moved to open or close the water outlet 43. This allows the water outlet 43 to simultaneously communicate with the cooling chamber 31 and to allow the user to add coolant to the water tank 4. The user can open the sealing element 8 to inject water into the water outlet 43 to add coolant to the water tank 4. After adding coolant, the sealing element 8 can be closed, and then the water tank 4 can be installed on the pressure cooking appliance. This multi-functional design simplifies the structure of the water tank 4, reduces the number of openings, lowers the sealing difficulty, and reduces the risk of coolant leakage.

[0069] Specifically, in one embodiment, such as Figure 5 As shown, the sealing component 8 is rotatably connected to the water tank 4 via a pivot, allowing it to be flipped open or closed at the outlet 43. Of course, the sealing component 8 can also be opened or closed at the outlet 43 by translation or by being detachable from the water tank 4; this is not limited to this method. Figure 5 As shown, the sealing member 8 has a sealing plug 81 that is inserted into the water outlet 43, and the sealing plug 81 has an installation channel 811 for installing the water outlet switch 45.

[0070] In a preferred embodiment, such as Figure 5 , Figure 6 , Figure 8 As shown, a return water switch 46 is provided at the return water inlet 44. The return water switch 46 has a third sealing part 461, which seals the return water inlet 44. The return water switch 46 can move close to the water tank 4 under the driving force of the water flow to open the return water inlet 44.

[0071] Preferably, both the water outlet 43 and the water return outlet 44 are located on the bottom wall of the water tank 4, so that if the sealing part 8, the water outlet switch 45 and the water return switch 46 are not properly sealed after the user adds water to the water tank 4 and before it is installed on the pot lid 1, leakage will occur at the water outlet 43 and the water return outlet 44, prompting the user to make timely adjustments.

[0072] In this embodiment, the return port 44 is also normally closed. When the water tank 4 is installed on the pressure cooking appliance, there is no coolant flow between the water tank 4 and the cooling chamber 31. The return switch 46 blocks the return port 44, preventing the coolant in the water tank 4 from flowing back into the cooling chamber 31 through the return port 44. Only when the water cooling function is activated does the water pump 2 start working, drawing the coolant in the water tank 4 from the outlet 43 into the cooling chamber 31. As the coolant flows towards the return port 44, it pushes the return switch 46 to open the return port 44, completing the return flow. When there is no coolant or very little coolant in the cooling chamber 31, it is insufficient to push the return switch 46 to move. At this time, the return switch 46 resumes blocking the return port 44, further ensuring that the coolant in the water tank 4 is always isolated from the outside world and is not easily contaminated.

[0073] Specifically, such as Figure 8 As shown, the return water switch 46 also includes a second elastic part 462 located above the third sealing part 461. The third sealing part 461 is located inside the return water port 44. The bottom wall of the water tank 4 is also provided with a second mating inclined surface 48 on the outer periphery of the return water port 44. The third sealing part 461 abuts against the second mating inclined surface 48 to seal the return water port 44. When the water pump 2 starts working, the coolant flowing towards the return water port 44 in the cooling chamber 31 forms a pushing force on the return water switch 46 towards the inside of the water tank 4, causing the third sealing part 461 to move upward (towards the inside of the water tank 4), causing the third sealing part 461 to disengage from the second mating inclined surface 48 and open the return water port 44. When there is no large amount of coolant flowing in the cooling chamber 31, the third sealing part 461 moves downward and resets under the elastic force of the second elastic part 462, restoring the abutment seal with the second mating inclined surface 48.

[0074] Preferably, such as Figure 8 As shown, the outer periphery of the third sealing part 461 is also a sloped structure, so that it can fit more tightly with the second mating sloped surface 48.

[0075] Specifically, such as Figure 8 As shown, a water return seat 7 is also provided at the junction of the pot lid 1 or the pot body and the water return port 44, and a second filter screen 71 is provided inside the water return seat 7.

[0076] It should be noted that this utility model does not limit the installation position of the water tank 4. In a preferred embodiment, such as... Figure 1 , Figure 2 , Figure 9 As shown, the top surface of the pot lid 1 is provided with a mounting position, and the water tank 4 is detachably installed in the mounting position. The water tank 4 extends to the edge of the pot lid 1 so that the side of the water tank 4 constitutes at least part of the exterior surface of the side of the pot lid 1, and the top surface of the water tank 4 constitutes at least part of the exterior surface of the top of the pot lid 1.

[0077] The water tank 4 is located on the pot cover 1, and the cooling component 3 is also located on the pot cover 1, which makes the length of the water cooling pipe between the water tank 4 and the cooling chamber 31 shorter and improves the flow efficiency of the coolant.

[0078] When removing or placing the water tank 4, the user can simultaneously grasp the side and top surfaces of the water tank 4. By applying force to the two surfaces forming an angle, it is easier for the user to apply force and the operation is more comfortable. This allows the water tank 4 to be easily removed from or installed in its mounting position, facilitating both installation and removal. Furthermore, the increased area of ​​the water tank 4, combined with the improved grip, helps to reduce its height. This allows the top surface of the water tank 4 to not protrude excessively from the top surface of the pot lid 1, and may even allow it to be flush with the top surface of the pot lid 1. This significantly reduces the height difference between the top surfaces of the water tank 4 and the pot lid 1, minimizing the overall obtrusiveness of the pot lid 1, improving its aesthetics and appearance, and reducing the overall volume of the pot lid 1 in the height direction, contributing to miniaturization.

[0079] Preferably, the water pump 2 is also located on the pot lid 1, such as... Figure 2 As shown, the pot lid 1 has a connecting end and an opening / closing end. The connecting end is used to rotate and connect with the pot body, and the opening / closing end can be flipped up and down around the connecting point to open and close the lid. The water tank 4 and the water pump 2 are both located near the connecting end (in the area between the center of the pot lid 1 and the connecting end).

[0080] Of course, the water tank 4 and the water pump 2 can be installed together or separately on the pot body, which is not limited here.

[0081] Preferably, the upper surface of the water tank 4 is flush with the upper surface of the lid 1. Of course, the upper surface of the water tank 4 can also be higher or lower than the upper surface of the lid 1, which is not limited here.

[0082] Furthermore, such as Figure 2 , Figure 5 As shown, the pot lid 1 is equipped with an exhaust assembly, the water tank 4 has a water storage chamber 41 and an exhaust chamber 42 inside, the exhaust assembly is connected to the exhaust chamber 42, the top surface of the water tank 4 is provided with an exhaust port 421 corresponding to the exhaust chamber 42, and the water storage chamber 41 surrounds at least a part of the area of ​​the exhaust chamber 42.

[0083] The water tank 4 has an internal venting chamber 42 that connects to the venting assembly on the lid 1. This allows the venting assembly to vent through the venting chamber 42 inside the water tank 4. This design allows for a concealed venting assembly; when the water tank 4 is installed on the lid 1, the venting assembly is not directly visible to the user from the outside of the lid 1, resulting in a cleaner appearance. Furthermore, the coolant stored in the water storage chamber 41 keeps the temperature low. At least a portion of the water storage chamber 41 surrounds the venting chamber 42, cooling the gas within it. This causes bubbles and foam rising with the gas to burst under the low temperature, leading to gas-liquid separation. The liquid then falls back under gravity, preventing liquid from spraying out of the outlet 532 of the venting chamber 42 and contaminating the lid 1. The low temperature also reduces the kinetic energy of the gas flow, thus reducing the whistling sound during venting and improving the user experience.

[0084] Specifically, such as Figure 2 As shown, the exhaust assembly includes a pressure relief valve 13 and a float valve 14. The exhaust chamber 42 and the pressure relief valve 13 are arranged vertically and vertically respectively, so that part of the pressure relief valve 13 extends into the exhaust chamber 42. The float valve 14 and the exhaust chamber 42 are staggered vertically. The pot lid 1 is provided with an exhaust channel that connects to the float valve 14. The exhaust channel is connected to one side of the exhaust chamber 42 so that the gas discharged from the float valve 14 enters the exhaust chamber 42 from one side of the exhaust chamber 42.

[0085] In a preferred embodiment of this utility model, such as Figure 1 , Figure 2 As shown, the pot lid 1 includes a lid body 11 and an inner lid 12. The inner lid 12 and the pot body cooperate to form a cooking cavity. The cooling component 3 is disposed on the lid body 11. The inner lid 12 is provided with a through hole, through which the cooling component 3 extends into the cooking cavity.

[0086] The cooling component 3 is disposed on the cover 11, and the cooling chamber 31 is located inside the cooling component 3. The lower end of the cooling component 3 extends into the cooking chamber through the through hole of the inner cover 12 to directly contact the high-temperature gas in the cooking chamber, thereby cooling the cooking chamber and achieving rapid pressure relief. Since the cooling component 3 is disposed on the cover 11, even if the inner cover 12 can rotate relative to the cover 11, the cover 11 will not move, thus ensuring that the cooling component 3 and the water-cooling pipes connected to the cooling component 3 will not change position, thereby maintaining a stable connection and seal between the water-cooling pipes and the cooling chamber 31, and improving the reliability of the pipe connection.

[0087] Furthermore, when the inner cover 12 is removed from the cover body 11, the cooling component 3 remains on the cover body 11 and its position does not change with the installation and removal of the inner cover 12. This eliminates the need for users to connect the water-cooling pipes to the cooling chamber 31 during the installation of the inner cover 12, reducing the efficiency and ease of operation of the inner cover 12 installation and removal, and improving the user experience. On the other hand, the water-cooling pipes can always remain connected to the cooling chamber 31, eliminating the need for frequent connection between the water-cooling pipes and the cooling chamber 31, thus ensuring a tight connection, further reducing the risk of water-cooling liquid leakage, and guaranteeing water-cooling efficiency.

[0088] In summary, after the water tank 4 and the cooling chamber 31 of this utility model are connected by pipelines, in subsequent use, no matter whether the user rotates the inner cover 12 or removes the inner cover 12, the cooling chamber 31 will never separate from the pot lid 1, and the relative position between it and the water tank 4 will always remain fixed, with no relative movement between them. Therefore, the position of the pipeline also remains stable, and a reliable connection is always maintained.

[0089] It should be noted that although the cooling component 3 is disposed on the cover 11 in this invention, so that the rotation and disassembly of the inner cover 12 will not affect the position of the cooling component 3 and the cooling cavity 31, this invention does not limit whether the inner cover 12 can be rotated or whether the inner cover 12 can be disassembled.

[0090] In other embodiments, the cooling element 3 may also be disposed with the inner cover 12. For example, the cooling element 3 may be disposed on the lower side of the inner cover 12, and the cooling cavity 31 may be located inside the cooling element 3. Alternatively, the cooling element 3 and the lower surface of the inner cover 12 may cooperate to form a cooling cavity 31, so that the cooling element 3 can also directly contact the high-temperature air in the cooking cavity for heat exchange.

[0091] For any parts not mentioned in this utility model, existing technologies can be used or referenced.

[0092] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0093] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A water-cooled pressure cooking appliance comprising a pot body and a pot cover, the pot body and the pot cover cooperating to form a cooking cavity, the pot cover being provided with a water tank, a water pump and a cooling member extending into the cooking cavity, characterized in that the cooling member has a cooling cavity inside, the water tank is provided with a water outlet and a water return opening in communication with the cooling cavity, and the pot cover is further provided with a vent valve comprising a valve body and a valve core arranged in the valve body, the valve body has a communication channel inside, the cooling cavity is in communication with the water return opening through the communication channel, and the valve core is movable to make the communication channel communicate with the atmosphere when the cooling cavity is in a negative pressure state.

2. The water-cooled pressure cooking appliance according to claim 1, characterized in that the valve body is provided with a vent opening in communication with the communication channel, and the valve core is arranged at the vent opening to seal the vent opening, and the valve core is movable towards the inside of the communication channel under the negative pressure suction in the communication channel to open the vent opening.

3. The water-cooled pressure cooking appliance according to claim 1, characterized in that the water outlet is provided with a water outlet switch having a first sealing portion to seal the water outlet, and the water outlet switch is movable away from the water tank under the suction of the water pump to open the water outlet.

4. The water-cooled pressure cooking appliance according to claim 3, characterized in that the valve core comprises a second sealing portion and an elastic reset member, and the water outlet switch further has a first elastic portion, and the elastic modulus of the elastic reset member is smaller than the elastic modulus of the first elastic portion.

5. The water-cooled pressure cooking appliance according to claim 3, characterized in that the water outlet is further provided with a blocking member movable relative to the water tank to open or cover the water outlet, and the water outlet switch is arranged on the blocking member.

6. The water-cooled pressure cooking appliance according to claim 1 or 3, characterized in that the water return opening is provided with a water return switch having a third sealing portion to seal the water return opening, and the water return switch is movable towards the water tank under the pushing action of water flow to open the water return opening.

7. The water-cooled pressure cooking appliance according to claim 1, characterized in that the valve body is provided with a vent opening in communication with the communication channel, and the valve core is arranged at the vent opening to seal the vent opening, and the valve body is internally provided with a surrounding rib, the surrounding rib surrounds a water outlet channel in the communication channel, the water outlet channel is in communication with the water return opening, and the lower edge of the surrounding rib is lower than the lower edge of the vent opening.

8. The water-cooled pressure cooking appliance according to claim 1, characterized in that the top surface of the pot cover is provided with a mounting position, the water tank is detachably arranged in the mounting position, and the water tank extends to the edge of the pot cover, so that the side surface of the water tank constitutes at least part of the appearance surface of the side portion of the pot cover, and the top surface of the water tank constitutes at least part of the appearance surface of the top portion of the pot cover.

9. The water-cooled pressure cooking appliance according to claim 8, characterized in that ​ ​ ​ ​ ​ ​ ​ ​ The pot cover is provided with an exhaust assembly, the water tank has a water storage cavity and an exhaust cavity inside, the exhaust assembly is communicated with the exhaust cavity, the top surface of the water tank is provided with an exhaust port corresponding to the exhaust cavity, and the water storage cavity surrounds at least a partial area of the exhaust cavity.

10. The water-cooled pressure cooking appliance according to claim 1, wherein The pot cover comprises a cover body and an inner cover, the inner cover cooperates with the pot body to form the cooking cavity, the cooling member is arranged on the cover body, and the inner cover is provided with a through hole, and the cooling member penetrates through the through hole to extend into the cooking cavity.

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