JP7837381B2 - Cookware lid assembly and cookware - Google Patents

Description

This application relates to the technical field of cooking apparatus, and more particularly to lid assemblies for cooking utensils and cooking utensils.

Conventional pressure-adjustable cookware often consists of a power component, a two-stage or more-stage transmission component, and an execution component for adjusting cooking pressure. However, too many combinations of transmission components can reduce the precision of pressure adjustment, making it difficult to adapt the cookware to the optimal cooking pressure for different foods. Furthermore, using inappropriate pressure can lead to overcooking of rice or other grains.

This application provides a lid assembly for a cooking utensil and a cooking utensil to solve the above-mentioned technical problems, or to solve the above-mentioned technical problems in part.

A first aspect of the present invention provides a lid assembly for a cooking appliance, comprising: a lid body having a pressure regulating passage, the pressure regulating passage having a pressure regulating valve for closing or opening the pressure regulating passage; and a pressure regulating drive module provided on the lid body corresponding to the pressure regulating valve, for applying pressure to the pressure regulating valve to adjust the closing pressure of the pressure regulating valve relative to the pressure regulating passage, wherein the pressure regulating drive module comprises a motor and a lifting and lowering pressurizing rod, the output end of the motor is provided with a screw structure, the lifting and lowering rod is movably mounted on the lid body and is screwed into the screw structure, the motor moves the lifting and lowering pressurizing rod in a direction toward or away from the pressure regulating valve, and the lifting and lowering pressurizing rod applies pressure to the pressure regulating valve.

In the cookware lid assembly provided by this application, a pressure regulating passage is provided in the lid body, a pressure regulating valve is provided in the pressure regulating passage for closing or opening the pressure regulating passage, and a pressure regulating drive module is provided in the lid body corresponding to the pressure regulating valve and applies pressure to the pressure regulating valve to adjust the closing pressure of the pressure regulating valve with respect to the pressure regulating passage. This controls the value of the gas pressure inside the cookware. Here, the pressure regulating drive module comprises a motor and a lifting and lowering pressurizing rod, a screw structure is provided at the output end of the motor, the lifting and lowering pressurizing rod is movably provided in the lid body and is screwed into the screw structure, the motor moves the lifting and lowering pressurizing rod in a direction toward or away from the pressure regulating valve, and the lifting and lowering pressurizing rod applies pressure to the pressure regulating valve. This adjusts the closing pressure of the pressure regulating valve with respect to the pressure regulating passage. The torque output by the motor drives the lifting and lowering pressurizing rod to move through the screw fitting and directly applies pressure to the pressure regulating valve. This reduces the number of transmission components involved in the transmission of motor power to the pressure regulating valve, improving the accuracy of the lid assembly in regulating the air pressure in the cooking chamber via the pressure regulating valve. Furthermore, by applying pressure to the pressure regulating valve through the movement of the lifting and lowering pressure rod, the directions of motion of the lifting and lowering pressure rod and the pressure regulating valve coincide, effectively ensuring a balanced force between the lifting and lowering pressure rod and the pressure regulating valve. This ensures the stability and reliability of pressure regulation through the cooperation of the pressure regulating drive module and the pressure regulating valve.

In some embodiments, a screw shaft is fixedly connected to the motor shaft of the motor, and the screw structure is formed on the outer circumferential surface of the screw shaft.

In some embodiments, the lid body is provided with a lifting guide hole, the lifting pressure rod is movably mounted in the lifting guide hole, the lifting guide hole is provided corresponding to the pressure regulating valve, and the lifting pressure rod moves along the lifting guide hole, passes through the lifting guide hole, and applies pressure to the pressure regulating valve.

In some embodiments, a first stopper portion is provided on the side of the lifting pressure rod, and a second stopper portion is provided on the inner wall of the lifting guide hole. The first and second stopper portions are fitted together to fix their position, thereby restricting the lifting pressure rod from rotating together with the motor.

In some embodiments, the first stopper portion is a stopper projection provided on the side of the lifting pressure rod, and the second stopper portion is a stopper groove provided on the inner wall of the lifting guide hole, the stopper groove extending along the axial direction of the lifting guide hole, and the stopper projection being inserted into the stopper groove and slidably connected to the stopper groove.

In some embodiments, a vertical stopper portion is provided on the side of the lifting pressure rod, located at one end of the lifting pressure rod away from the pressure regulating valve. When the lifting pressure rod moves to a set position toward the pressure regulating valve, the vertical stopper portion abuts against the lid body, preventing the lifting pressure rod from disengaging from the motor's screw structure.

In some embodiments, the lid body comprises a front lid and a back lid connected to the front lid, the pressure adjustment drive module is provided on the front lid, the back lid is provided with a mounting through-hole corresponding to the lifting pressure rod, and the mounting through-hole is provided with a pressure adjustment seal member connected to a region of the back lid located around the mounting through-hole and covering the mounting through-hole, the pressure adjustment seal member is located between the lifting pressure rod and the pressure adjustment valve, and the pressure adjustment seal member is configured to elastically deform under the pressure action of the lifting pressure rod to apply pressure to the pressure adjustment valve.

In some embodiments, the lid body further comprises a movable lid body that is detachably attached to the rear lid on the side opposite to the front lid, and the pressure regulating passage and the pressure regulating valve are provided on the movable lid body.

In some embodiments, the pressure regulating seal member comprises a pressure block portion and an arm portion connected to the edge of the pressure block portion. The pressure block portion is provided opposite the lifting pressure rod and the pressure regulating valve. The lifting pressure rod applies pressure to the pressure regulating valve via the pressure block portion, and the arm portion is configured to elastically deform when the lifting pressure rod applies pressure to the pressure block portion.

In some embodiments, the height of the pressure block portion along the direction of movement of the lifting pressure rod is greater than the movement stroke of the lifting pressure rod, and/or the ratio of the area of the end face of the pressure block portion that contacts the lifting pressure rod to the area of the end face of the lifting pressure rod that contacts the pressure block portion is 0.6 or more.

In some embodiments, the arm portion comprises a first edge bending portion and a second edge bending portion, the second edge bending portion being provided surrounding the pressure block portion and connected to the edge portion of the pressure block portion, the first edge bending portion having one edge connected to the edge portion of the second edge bending portion away from the pressure block portion at an angle, and the other edge connected to the region located around the mounting through hole of the back cover.

In some embodiments, the length ratio between the first edge bending portion and the second edge bending portion is 0.7 to 0.95.

In some embodiments, the surface lid is provided with a mounting groove formed recessed toward the rear lid, the lifting pressure rod is movably mounted within the mounting groove, and the motor is fixedly connected to the inner groove wall of the mounting groove.

In some embodiments, the lid body comprises a front lid and a back lid connected to the front lid, and the pressure adjustment drive module is provided on the back lid.

In some embodiments, the pressure regulating drive module further comprises a first microswitch and a second microswitch, and the lifting/pressurizing rod is provided with a switch trigger section, which is configured to trigger the operation of the first microswitch when the lifting/pressurizing rod moves to a first position in the direction approaching the pressure regulating valve, and to trigger the operation of the second microswitch when the lifting/pressurizing rod moves to a second position in the direction away from the pressure regulating valve.

A second aspect of the present application provides a cooking utensil comprising a main body and a lid assembly for a cooking utensil described in any one of the above paragraphs, which is provided on the main body so as to be openable and closable.

The drawings herein are incorporated herein and constitute part of this specification, illustrating embodiments conforming to this application, and are used together with this specification to interpret the principles of this application.

The following briefly describes the drawings necessary for the description of the embodiments or prior art in order to more clearly explain the embodiments of this application or the technical solutions of the prior art. However, it will be apparent to those skilled in the art that other drawings can be obtained from these drawings without any creative effort.

This is a schematic diagram of the structure of a cooking utensil according to an embodiment of the present invention. This is a cross-sectional view of a cooking utensil according to an embodiment of the present application. This is the first cross-sectional view of a lid assembly according to an embodiment of the present application. Figure 3 is a magnified view of a partial structure of the structure shown. This is a plan view of a lid assembly according to an embodiment of the present application. This is a second cross-sectional view of a lid assembly according to an embodiment of the present application. This is a schematic diagram of the structure of a lifting and lowering pressure rod according to an embodiment of the present invention. This is an exploded view of a pressure regulating drive module according to an embodiment of the present invention. This is a schematic diagram illustrating the structure of a pressure regulating seal member according to an embodiment of the present invention, which applies pressure to a pressure regulating valve to close the pressure regulating passage. This is a schematic diagram illustrating the structure of a pressure regulating valve according to an embodiment of the present invention, in which a pressure regulating passage is opened. This is a schematic diagram of the cross-sectional structure of a pressure regulating seal member according to an embodiment of the present invention.

To provide a clearer understanding of the above-mentioned objectives, features, and advantages of this application, embodiments of this application are further described below. The embodiments and features of this application can be combined with each other, provided they do not conflict.

While many specific details are provided in the following description to facilitate a thorough understanding of this application, it is clear that this application may be implemented in ways other than those described herein, and the examples provided herein represent only a limited number of examples, not all examples.

As shown in Figures 1 to 11, the embodiment of the present invention provides a lid assembly comprising a lid body 1 and a pressure regulating drive module. The lid body 1 is provided with a pressure regulating passage 36, and the pressure regulating passage 36 is provided with a pressure regulating valve 35 for closing or opening the pressure regulating passage 36. The pressure regulating drive module is provided in the lid body 1 in correspondence with the pressure regulating valve 35 and applies pressure to the pressure regulating valve 35 to adjust the closing pressure of the pressure regulating valve 35 relative to the pressure regulating passage 36.

Specifically, different foods require different cooking pressures to achieve the desired cooking effect. By installing a pressure adjustment drive module in the lid body 1, the pressure adjustment drive module applies different pressures to the pressure adjustment valve 35, thereby achieving the objective of cooking at different pressures depending on the type of food. Specifically, during cooking in the cooking appliance, if the temperature inside the cooking chamber 21 continues to rise, the water inside the cooking chamber 21 evaporates into steam and the gas continues to expand, causing the air pressure inside the cooking appliance to continue to rise. If the gas pressure inside the cooking appliance is greater than the closing pressure of the pressure adjustment valve 35 relative to the pressure adjustment passage 36, the pressure adjustment valve 35 opens the pressure adjustment passage 36, and a portion of the gas inside the cooking chamber 21 is discharged from the cooking chamber 21 through the pressure adjustment passage 36, reducing the gas pressure inside the cooking chamber 21 and releasing the pressure. If the gas pressure inside the cooking appliance is less than the closing pressure of the pressure adjustment valve 35 relative to the pressure adjustment passage 36, the pressure adjustment valve 35 closes the pressure adjustment passage 36, and the gas pressure inside the cooking chamber 21 gradually rises due to the effect of temperature. In this way, the pressure applied to the pressure regulating valve 35 by the pressure regulating drive module controls the gas pressure in the cooking chamber 21 within a preset pressure range, thereby achieving the objective of cooking different foods at the appropriate pressure.

Here, the pressure regulating drive module comprises a motor 31 and a lifting/lowering pressure rod 33. A threaded structure is provided at the output end of the motor 31, and the lifting/lowering pressure rod 33 is movably mounted on the lid body 1 and screwed into the threaded structure. The motor 31 moves the lifting/lowering pressure rod 33 toward or away from the pressure regulating valve 35, thereby applying pressure to the pressure regulating valve 35.

In other words, a screw connection is used to connect the motor 31 and the lifting/pressuring rod 33. The driving force of the motor 31 drives the lifting/pressuring rod 33 to move via the screw connection, thereby applying pressure to the pressure regulating valve 35. The torque output from the motor 31 drives the lifting/pressuring rod 33 to move via the screw connection, directly applying pressure to the pressure regulating valve 35. This reduces the number of transmission members involved in the process of transmitting the output power of the motor 31 to the pressure regulating valve 35, improving the accuracy with which the lid assembly adjusts the air pressure in the cooking chamber 21 via the pressure regulating valve 35, and thus improving the texture of the cooked food.

Furthermore, by using the pressure adjustment drive module in the above embodiment of this application with pressure-adjustable cooking appliances, particularly those used for cooking at low pressure (30 kPa or less), the accuracy of pressure adjustment can be effectively improved. By controlling the pressure adjustment accuracy error to 5 kPa or less, the objective of precise pressure control according to the type of food can be achieved, thereby effectively improving the texture of the cooked food.

More specifically, optionally, a screw thread may be provided on the outer circumference of the output end of the motor 31, and the lifting/pressuring rod 33 may have a mounting screw hole 331 at one end for connection to the output end of the motor 31, so that the output end of the motor 31 is screwed into the mounting screw hole 331 of the lifting/pressuring rod 33. Of course, optionally, a screw shaft 32 may be fixedly connected to the output end of the motor 31, with a screw thread provided on the outer circumference of the screw shaft 32, and optionally, a mounting screw hole 331 may be provided on the lifting/pressuring rod 33, so that the motor 31 is screwed to the lifting/pressuring rod 33 by connecting the screw shaft 32 to the mounting screw hole 331. When the screw shaft 32 is rotationally driven by the motor 31, the screw engagement between the screw shaft 32 and the lifting/pressuring rod 33 drives the lifting/pressuring rod 33 to move along the lifting/pressuring guide hole 13 in a direction toward or toward the pressure regulating valve 35.

This method applies pressure to the pressure regulating valve 35 by moving the lifting and pressing rod 33. Selectively, the lifting and pressing rod 33 and the pressure regulating valve 35 are installed facing each other, and the direction of movement of the lifting and pressing rod 33 is configured to approach or move away from the pressure regulating valve 35. This effectively ensures a balance of the force acting on the pressure regulating valve 35 by the lifting and pressing rod 33, preventing the pressure regulating valve 35 from shifting due to the pressure from the lifting and pressing rod 33. This ensures the stability and reliability of pressure regulation through the cooperation of the pressure regulating drive module and the pressure regulating valve 35.

Specifically, the pressure regulating valve 35 may optionally be provided on the side of the lid body 1 closer to the cooking chamber 21. When the output end of the motor 31 rotates, the screw fitting drives the lifting pressure rod 33 to move toward or away from the pressure regulating valve 35. Optionally, the lid body 1 may be provided with a lifting guide hole, the lifting pressure rod 33 may be inserted into the lifting guide hole, and the lifting pressure rod 33 may be made movable along the axis of the lifting guide hole. Optionally, the lifting pressure rod 33 may be a rectangular rod, the lifting guide hole in the lid body 1 may be a rectangular through-hole that fits the dimensions of the lifting pressure rod 33, and after the lifting pressure rod 33 is inserted into the lifting guide hole in the lid body 1, the lifting pressure rod 33 may not rotate with the output end of the motor 31 even when the output end of the motor 31 rotates. This creates relative rotation between the output end of the motor 31 and the lifting/lowering pressure rod 33. The screw connection between the output end of the motor 31 and the lifting/lowering pressure rod 33 allows the lifting/lowering pressure rod 33 to be driven to move along the axis of the lifting/lowering guide hole in the lid body 1.

Of course, selectively, the lifting pressure rod 33 may be a cylindrical rod, with a circular lifting guide hole 13 provided in the lid body 1, and the lifting pressure rod 33 passing through the lifting guide hole 13 and being movably connected to the lifting guide hole 13. A projection extending in the direction of the axis of the lifting guide hole 13 is provided on the side of the lifting pressure rod 33, and a groove extending in the direction of the axis of the lifting guide hole 13 is provided on the inner wall of the lifting guide hole 13. After the projection is inserted into the groove, the projection becomes movable in the direction of the axis of the lifting guide hole 13 within the groove, so that the fitting of the projection and the groove does not affect the movement of the lifting pressure rod 33 along the axis of the lifting guide hole 13. When the output end of the motor 31 rotates, the projection acts as a stopper in the rotational direction of the screw shaft 32 within the groove, preventing the lifting pressure rod 33 from rotating together with the output end of the motor 31. The motor 31 can then drive the lifting pressure rod 33 along the lifting guide hole 13 via the screw.

The output end of the motor 31 pushes the lifting pressure rod 33 in the direction of the axis of the lifting guide hole 13 by a screw, causing the lifting pressure rod 33 to move toward the cooking chamber 21 and apply pressure to the pressure regulating valve 35. The greater the pressure received by the pressure regulating valve 35, the greater the closing pressure of the pressure regulating valve 35 relative to the pressure regulating passage, allowing for a higher pressure to be maintained within the cooking chamber 21.

When the lid body 1 covers the cooking chamber 21 and the pressure regulating valve 35 closes the pressure regulating passage 36, the cooking chamber 21 is sealed. When the pressure regulating valve 35 opens, the cooking chamber 21 can communicate with the outside through the pressure regulating passage 36. When the gas pressure inside the cooking chamber 21 is greater than the pressure received by the pressure regulating valve 35, the pressure regulating valve 35 opens and releases some of the gas inside the cooking chamber 21. When the gas pressure inside the cooking chamber 21 is lower than the pressure received by the pressure regulating valve 35, the pressure regulating valve 35 closes, and the gas pressure inside the cooking chamber 21 gradually increases further, maintaining the gas pressure inside the cooking chamber 21 within a certain numerical range. In other words, the greater the pressure received by the pressure regulating valve 35, the greater the gas pressure that can be held inside the cooking chamber 21.

The cooking appliance described above includes a cooking chamber 21 that opens toward the lid body 1. The lid body 1 covers the opening of the cooking chamber 21. The motor 31 and pressure regulating valve 35 are located separately on both sides of the lid body 1. The motor 31 and pressure regulating valve 35 are positioned opposite each other. Selectively, the pressure regulating valve 35 may be connected to the side of the lid body 1 closest to the cooking chamber 21. A lifting guide hole 13 is located between the motor 31 and the pressure regulating valve 35, and after inserting the lifting pressure rod 33 into the lifting guide hole 13, both ends of the lifting pressure rod 33 can be directly connected to the motor 31 and the pressure regulating valve 35.

Selectively, the lid body 1 described above may be provided with a steam valve 16 that communicates with the external environment of the cooking appliance. When the steam valve 16 is opened, the gas inside the cooking chamber 21 is discharged through the steam valve 16, allowing for rapid pressure release.

Optionally, a pressure regulating passage 36 may be provided in the lid body 1. The pressure regulating passage 36 has one end connected to the cooking chamber 21 and the other end connected to the outside of the cooking appliance, allowing gas in the cooking chamber 21 to be discharged from the cooking appliance via the pressure regulating passage 36. Optionally, a pressure regulating valve 35 may be provided at the end of the pressure regulating passage 36 closer to the cooking chamber 21, allowing the pressure regulating valve 35 to close or open the pressure regulating passage. Of course, the pressure regulating valve 35 may also be provided on the side of the lid body 1 closer to the cooking chamber 21, with one end of the pressure regulating passage 36 connected to the outside of the cooking chamber 21 and the other end connected to the pressure regulating valve 35. The pressure regulating valve 35 may have a pressure regulating hole communicating with the cooking chamber 21, allowing gas in the cooking chamber 21 to be discharged from the cooking appliance through the pressure regulating hole and the pressure regulating passage 36.

Selectively, the pressure regulating valve 35 may include a plug and an elastic member. A lifting and pressing rod 33 is connected to the elastic member, and the plug is provided at one end of the elastic member away from the lifting and pressing rod 33. The plug and elastic member are positioned toward the pressure regulating hole. When the lifting and pressing rod 33 moves toward the pressure regulating hole, the elastic member is compressed, driving the plug to close the pressure regulating hole. During the heating process, the gas pressure inside the cooking chamber 21 continues to rise, and when the pressure inside the cooking chamber 21 becomes greater than the pressure applied to the plug by the elastic member, the plug is pushed up, and a portion of the gas inside the cooking chamber 21 is discharged from the cooking chamber 21 through the pressure regulating hole, achieving a temporary pressure release. After the pressure release, the gas pressure inside the cooking chamber 21 decreases, and the elastic member pushes the plug, closing the pressure regulating hole and maintaining the gas inside the cooking chamber 21 at a stable pressure value . By adjusting the pressure applied to the elastic member of the pressure regulating valve 35 by the lifting and pressing rod 33, the gas pressure value inside the cooking chamber 21 can be adjusted.

As shown in Figures 2, 3, 4, 7, and 8, in some embodiments, a screw shaft 32 is fixedly connected to the motor shaft of the motor 31, and a screw structure is formed on the outer surface of the screw shaft 32. This allows the screw shaft 32 to be screwed into the lifting/lowering pressure rod 33, eliminating the need to replace the entire motor 31 if wear occurs on the motor shaft. Furthermore, by adjusting the dimensions of the screw shaft 32, it can accommodate lifting/lowering pressure rods 33 of different dimensions, making it easier to screw the motor 31 to lifting/lowering pressure rods 33 of various dimensions.

Specifically, a fixing hole may be selectively provided in the center of the screw shaft 32, and the output end of the motor 31 may be fixedly connected to the screw shaft 32 after being inserted into it. The output end of the motor 31 rotates, causing the screw shaft 32 to rotate. The end of the lifting/pressure rod 33 is provided with a mounting screw hole 331 that fits the screw shaft 32. After the screw shaft 32 is screwed into the mounting screw hole 331 of the lifting/pressure rod 33, as the screw shaft 32 rotates, the action of the screw causes the lifting/pressure rod 33 to move along the lifting/pressure guide hole 13 in a direction approaching the pressure regulating valve 35 and in a direction away from the pressure regulating valve 35.

As shown in Figures 2, 3, 4, 7, and 8, in some embodiments, the lid body 1 is provided with a lifting guide hole 13, and a lifting pressure rod 33 is movably mounted in the lifting guide hole 13. The lifting guide hole 13 is provided in conjunction with the pressure regulating valve 35, and the lifting pressure rod 33 moves along the lifting guide hole 13, passes through the lifting guide hole 13, and applies pressure to the pressure regulating valve 35.

Specifically, selectively, the lifting guide hole 13 may be a rectangular hole, and the lifting pressure rod 33 may be a rectangular rod. After inserting the lifting pressure rod 33 into the lifting guide hole 13, the lifting pressure rod 33 can move along the axis of the lifting guide hole 13, but the side walls of the lifting guide hole 13 can restrict the rotation of the lifting pressure rod 33 relative to the lifting guide hole 13. This allows the lifting pressure rod 33 to be driven to move along the lifting guide hole 13 by a screw when the output end of the motor 31 is rotated.

Of course, selectively, the lifting guide hole 13 may be a round hole, and the lifting pressure rod 33 may be a cylindrical rod. Selectively, a bracket may be provided on the lid body 1, a slide groove may be provided on the bracket along the axis of the lifting guide hole 13, and a slider may be provided on the side of the lifting pressure rod 33. When the lifting pressure rod 33 is inserted into the lifting guide hole 13, the slider is inserted into the slide groove, allowing the lifting pressure rod 33 to move along the lifting guide hole 13. The slider and slide groove then act as stoppers in the rotational direction of the lifting pressure rod 33 relative to the lifting guide hole 13. This allows the lifting pressure rod 33 to be driven to move along the lifting guide hole 13 by a screw when the output end of the motor 31 is rotated.

Alternatively, as described above, after inserting the lifting pressure rod 33 into the lifting guide hole 13, the lifting pressure rod 33 may not only move relative to the lifting guide hole 13 along its axis, but may also be selectively provided with a projection extending along the axis of the lifting guide hole 13 on the side of the lifting pressure rod 33, and a groove extending along the axis of the lifting guide hole 13 on the inner wall of the lifting guide hole 13. After inserting the projection into the groove, the projection can move within the groove along the axis of the lifting guide hole 13. When the screw shaft 32 rotates, the projection acts as a stopper in the direction of rotation of the screw shaft 32 within the groove. That is, even if the screw shaft 32 rotates, the lifting pressure rod 33 does not rotate with the screw shaft 32, and the output end of the motor 31 can drive the lifting pressure rod 33 to move along the lifting guide hole 13 by the screw.

Of course, a groove may be provided on the side of the lifting pressure rod 33, extending in the direction of the axis of the lifting guide hole 13, and a projection may be provided on the inner wall of the lifting guide hole 13. After inserting the projection into the groove, the lifting pressure rod 33 can move along the direction of the axis of the lifting guide hole 13. Furthermore, when the screw shaft 32 rotates, the lifting pressure rod 33 cannot rotate with the screw shaft 32 due to the positional fixation between the projection and the groove in the direction of rotation of the screw shaft 32. As a result, the screw shaft 32 can be driven to move the lifting pressure rod 33 along the lifting guide hole 13 by the action of the screw.

By providing a lifting guide hole 13 in the lid body 1 and positioning the lifting guide hole 13 opposite the pressure regulating valve 35, the lifting guide hole 13 acts to guide the movement of the lifting pressure rod 33, thereby increasing the stability of the trajectory of the lifting pressure rod 33 during its movement, and enabling the lifting pressure rod 33 to apply stable pressure to the pressure regulating valve 35.

As shown in Figures 2, 3, 4, 7, and 8, in some embodiments, a first stopper portion 41 is provided on the side of the lifting pressure rod 33, and a second stopper portion 42 is provided on the inner wall of the lifting guide hole 13. The first stopper portion 41 and the second stopper portion 42 are fitted together to fix their positions, thereby restricting the rotation of the lifting pressure rod 33 together with the motor 31.

Specifically, after inserting the lifting pressure rod 33 into the lifting guide hole 13, the lifting pressure rod 33 becomes movable relative to the lifting guide hole 13 along its axis. Selectively, a projection extending along the axis of the lifting guide hole 13 may be provided on the side of the lifting pressure rod 33 as a first stopper portion 41, and a groove along the axis of the lifting guide hole 13 may be provided on the inner wall of the lifting guide hole 13 as a second stopper portion 42. After inserting the projection into the groove, the projection becomes movable within the groove along the axis of the lifting guide hole 13. When the motor 31 rotates, the projection acts as a stopper in the rotational direction of the screw shaft 32 within the groove. That is, even when the motor 31 rotates, the lifting pressure rod 33 does not rotate with the motor 31, and the motor 31 can drive the lifting pressure rod 33 to move along the lifting guide hole 13 by screw engagement.

Of course, selectively, the first stopper portion 41 may be a groove provided on the side surface of the lifting pressure rod 33, the groove extending in the direction of the axis of the lifting guide hole 13, and a projection may be provided on the inner wall of the lifting guide hole 13. After the projection is inserted into the groove, the lifting pressure rod 33 can move along the axis of the lifting guide hole 13. However, when the motor 31 rotates, the lifting pressure rod 33 acts as a stopper in the direction of rotation of the motor 31 due to the projection and groove, preventing the lifting pressure rod 33 from rotating with the motor 31. This allows the motor 31 to drive the lifting pressure rod 33 to move along the lifting guide hole 13 by the action of a screw.

A first stopper portion 41 is provided on the side of the lifting pressure rod 33, and a second stopper portion 42 is provided on the inner wall of the lifting guide hole 13. By fitting the first stopper portion 41 and the second stopper portion 42 together to fix their positions, the rotation of the lifting pressure rod 33 together with the motor 31 is restricted. When the motor 31 rotates, the lifting pressure rod 33 and the motor 31 rotate relative to each other, allowing the screw to drive the lifting pressure rod 33 along the lifting guide hole 13. This ensures the accuracy with which the driving force output from the motor 31 moves the lifting pressure rod 33.

As shown in Figures 7 and 8, in some embodiments, the first stopper portion 41 is a stopper projection provided on the side of the lifting pressure rod 33, and the second stopper portion 42 is a stopper groove provided on the inner wall of the lifting guide hole 13. The stopper groove extends along the axial direction of the lifting guide hole 13, and the stopper projection is inserted into the stopper groove and slidably connected to it.

Specifically, the stopper projection selectively protrudes radially along the lifting/pressure rod 33, and the inner wall of the lifting/pressure hole 13 is recessed radially along the lifting/pressure hole 13, away from the axis of the lifting/pressure hole 13, forming a stopper groove. The direction from the motor 31 toward the pressure regulating valve 35 is the direction of movement of the lifting/pressure rod 33. The stopper groove extends along the direction from the motor 31 toward the pressure regulating valve 35, increasing the contact area between the stopper projection and the stopper groove. The stopper projection is slidably connected to the stopper groove. The stopper projection is located within the stopper groove and does not affect the movement of the lifting/pressure rod 33 toward or away from the cooking chamber 21.

After the aforementioned stopper projection is connected to the stopper groove, when the motor 31 is rotated, the motor 31 becomes rotatable relative to the lifting pressure rod 33 without the lifting pressure rod 33 rotating within the lifting guide hole 13. The motor 31, through the action of a screw, can drive the lifting pressure rod 33 to move toward or away from the cooking chamber 21.

The first stopper portion 41 is provided as a stopper projection on the side of the lifting pressure rod 33, and the second stopper portion 42 is provided as a stopper groove on the inner wall of the lifting guide hole 13. By connecting the stopper projection and the stopper groove, they act as a stopper against the rotation of the lifting pressure rod 33. When the motor 31 is rotated, it can rotate relative to the lifting pressure rod 33, and the motor 31 drives the lifting pressure rod 33 to move through the action of a screw.

As shown in Figures 6, 7, and 8, in some embodiments, there are multiple first stopper portions 41 and multiple second stopper portions 42. The multiple first stopper portions 41 are provided on the side of the lifting pressure rod 33 at intervals along the circumferential direction of the lifting guide hole 13, and the multiple second stopper portions 42 are provided on the inner wall of the lifting guide hole 13 at intervals along the circumferential direction of the lifting guide hole 13. The multiple first stopper portions 41 are fitted and connected to the multiple second stopper portions 42 in a one-to-one correspondence to fix their position.

Specifically, the number of first stopper portions 41 and second stopper portions 42 may be selectively two. Selectively, the two first stopper portions 41 may be provided on both sides of the lifting/lowering pressure rod 33 along its radial direction, and the two second stopper portions 42 may be provided on both sides of the lifting/lowering pressure rod 33 along the radial direction of the lifting/lowering guide hole 13. The two first stopper portions 41 and the two second stopper portions 42 may be provided in a one-to-one correspondence.

Of course, the number of first stopper portions 41 and second stopper portions 42 may be three. The three first stopper portions 41 are provided at intervals along the circumferential direction of the lifting pressure rod 33, and the three second stopper portions 42 are provided at intervals along the circumferential direction of the lifting guide hole 13. The three first stopper portions 41 and the three second stopper portions 42 are provided in a one-to-one correspondence and connected to each other.

By providing multiple first stopper portions 41 and multiple second stopper portions 42, and fitting and connecting the multiple first stopper portions 41 and multiple second stopper portions 42 in a one-to-one correspondence, multiple position-locking fitting connection points are created between the lifting pressure rod 33 and the lifting guide hole 13. This distributes the pressure applied to the lifting guide hole 13 when the screw shaft 32 is rotated to drive the lifting pressure rod 33 to move.

As shown in Figures 3, 4, 6, 7, and 8, in some embodiments, a vertical stopper portion 332 is provided on the side of the lifting pressure rod 33, located at one end away from the pressure regulating valve 35. When the lifting pressure rod 33 moves to the set position toward the pressure regulating valve 35, the vertical stopper portion 332 contacts the lid body 1, limiting the separation of the lifting pressure rod 33 from the screw shaft 32.

Specifically, optionally, a projection extending radially from the lifting pressure rod 33 may be provided at the end of the lifting pressure rod 33 as a vertical stopper portion 332. When the lifting pressure rod 33 moves toward the cooking chamber 21 and reaches the set position, the projection contacts the surrounding area of the lifting guide hole 13, thereby restricting the lifting pressure rod 33 from moving toward the cooking chamber 21. Optionally, the set position may be a limit position where one end of the screw shaft 32 away from the motor 31 is connected to the mounting screw hole 331 of the lifting pressure rod 33. That is, when the lifting pressure rod 33 is in the set position, if the motor 31 continues to rotate and pushes the lifting pressure rod 33 toward the cooking chamber 21, the screw structure of the motor 31 will disengage from the mounting screw hole 331. Of course, optionally, the set position may be located between the limit position and the motor 31. The vertical stopper 332 prevents the lifting/lowering pressure rod 33 from continuing to move toward the pressure regulating valve 35 after it has moved to the set position, thereby preventing the screw connection between the motor 31 and the lifting/lowering pressure rod 33 from coming undone.

The lifting pressure rod 33 has a vertical stopper portion 332 at one end opposite the cooking chamber 21 of the lid body 1. When the lifting pressure rod 33 moves to its set position, the vertical stopper portion 332 restricts its movement toward the cooking chamber 21, preventing the motor 31's screw structure from disengaging from the mounting screw hole 331 and maintaining the screw connection between the lifting pressure rod 33 and the motor 31 during movement.

As shown in Figures 2, 3, 4, 5, and 6, in some embodiments, the lid body 1 comprises a front lid 11 and a back lid 12 connected to the front lid 11, with a pressure adjustment drive module provided on the front lid 11.

The rear cover 12 is provided with a mounting through-hole corresponding to the lifting/lowering pressure rod 33, and a pressure regulating seal member 34 is provided in the mounting through-hole. The pressure regulating seal member 34 is connected to the area surrounding the mounting through-hole in the rear cover 12, covering the mounting through-hole. Furthermore, the pressure regulating seal member 34 is positioned between the lifting/lowering pressure rod 33 and the pressure regulating valve, and is configured to elastically deform under the pressure of the lifting/lowering pressure rod 33, thereby applying pressure to the pressure regulating valve 35.

Specifically, optionally, the front cover 11 and the back cover 12 are provided facing each other and connected, the back cover 12 is located on the side closer to the cooking chamber 21, and the motor 31 may be attached to the front cover 11. Optionally, the pressure regulating valve 35 is attached to the back cover 12, and the motor 31 and the back cover 12 are provided facing each other. Optionally, the lifting and lowering pressure rod 33 may be movably provided on the front cover 11. Optionally, the mounting through-hole is a through-hole provided in the back cover 12, and the mounting through-hole and the lifting and lowering pressure rod 33 are provided facing each other. Optionally, the pressure regulating seal member 34 is provided on the side of the back cover 12 closer to the front cover 11, and the pressure regulating seal member 34 and the mounting through-hole are provided facing each other. When the lifting/pressuring rod 33 comes into contact with the pressure regulating seal member 34, the pressure regulating seal member 34 deforms, and at least a portion of the pressure regulating seal member 34 moves together with the lifting/pressuring rod 33. At least a portion of the pressure regulating seal member 34 then comes into contact with the pressure regulating valve 35, causing the lifting/pressuring rod 33 to apply pressure to the pressure regulating valve 35 via the pressure regulating seal member 34.

Of course, optionally, the lifting guide hole 13 may be provided in the surface cover 11, positioned between the motor 31 and the pressure regulating valve 35, and the lifting pressure rod 33 may be inserted into the lifting guide hole 13. Optionally, the mounting through hole may be a through hole provided in the back cover 12, and the axis lines of the mounting through hole and the lifting guide hole 13 may overlap. Optionally, the pressure regulating seal member 34 may be provided on the side of the back cover 12 closer to the surface cover 11, and the pressure regulating seal member 34 and the mounting through hole may be positioned opposite each other.

One end of the aforementioned lifting and lowering pressure rod 33 is located on the opposite side of the surface cover 11 from the back cover 12, and the other end of the lifting and lowering pressure rod 33 is located on the side of the surface cover 11 closer to the back cover 12. As a result, one end of the lifting and lowering pressure rod 33 is screwed into the motor 31, and the other end abuts against the pressure adjustment seal member 34.

Selectively, the pressure regulating seal member 34 may be a block-shaped structure or a deformable sheet-shaped structure. The pressure regulating seal member 34 is provided on the surface of the pressure regulating valve 35 closest to the surface cover 11. Selectively, the edge of the pressure regulating seal member 34 may be sealed and connected to the area surrounding the mounting through-hole of the back cover to prevent gas from contacting the motor 31 through the mounting through-hole.

Selectively, the pressure regulating seal member 34 may be in contact with the end of the lifting/pressuring rod 33. As the lifting/pressuring rod 33 moves, it moves along with the pressure regulating seal member 34, causing the seal member 34 to contact the pressure regulating valve 35 and apply pressure to it. Of course, selectively, the side of the pressure regulating valve 35 facing the lid body 1 may be in contact with the pressure regulating seal member 34, and the lifting/pressuring rod 33 may move toward the pressure regulating valve 35, contact the pressure regulating seal member 34, and then apply pressure to the pressure regulating valve 35.

Alternatively, the pressure regulating seal member 34 may be movably provided between the pressure regulating valve 35 and the lifting/lowering pressurizing rod 33. When the lifting/lowering pressurizing rod 33 moves toward the pressure regulating valve 35, the lifting/lowering pressurizing rod 33 may first contact the pressure regulating seal member 34, causing it to move. Subsequently, the pressure regulating seal member 34 may contact the pressure regulating valve 35, and the lifting/lowering pressurizing rod 33 may apply pressure to the pressure regulating valve 35 via the pressure regulating seal member 34. However, the system is not limited to this configuration.

The lid body 1 comprises a front lid 11 and a back lid 12 connected to the front lid 11. A pressure adjustment drive module is provided on the front lid 11, and the motor 31 is mounted on the front lid 11. This arrangement allows the motor 31 to be placed in a cooler environment away from the cooking chamber 21 when the cooking chamber 21 is heated, thereby lowering the operating temperature of the motor 31. The back lid 12 is provided with a mounting through-hole corresponding to the lifting and lowering pressurizing rod 33, and a pressure adjustment seal member 34 is installed in the mounting through-hole. The pressure adjustment seal member 34 is connected to an area of the back lid 12 located around the mounting through-hole. The pressure adjustment seal member 34 is positioned between the lifting and lowering pressurizing rod 33 and the pressure adjustment valve 35. The lifting and lowering pressurizing rod 33 first contacts the pressure adjustment seal member 34, and pressure is applied to the pressure adjustment valve 35 via the pressure adjustment seal member 34. The pressure regulating seal member 34 can increase the contact area with the pressure regulating valve 35, thus preventing the pressure regulating valve 35 from being damaged due to an increased pressing force per unit area by the lifting and lowering pressurizing rod 33, which has a small contact area.

As shown in Figures 2, 3, 4, and 6, in some embodiments, the lid body 1 further comprises a movable lid plate 15 that is detachably attached to the side of the rear lid 12 opposite to the front lid 11. Both the pressure regulating passage 36 and the pressure regulating valve 35 are installed on the movable lid plate 15.

Specifically, the movable cover plate 15 is detachably attached to the back cover 12 on the side opposite the front cover 11. The movable cover plate 15 can cover the opening of the cooking chamber 21. Both the pressure regulating valve 35 and the pressure regulating passage 36 are installed on the movable cover plate 15, and gas in the cooking chamber 21 must pass through the pressure regulating passage 36 and the pressure regulating valve 35 of the movable cover plate 15 in order to be released from the cooking appliance. When the movable cover plate 15 is removed from the back cover 12, the contact between the pressure regulating valve 35 and the pressure regulating seal member 34 is released, but the pressure regulating seal member 34 remains attached to the back cover 12.

By detachably attaching the movable cover plate 15 to the opposite side of the rear cover 12 from the front cover 11, and by installing both the pressure regulating passage 36 and the pressure regulating valve 35 on the movable cover plate 15, the user can directly clean the pressure regulating valve 35 and the pressure regulating passage 36 after removing the movable cover plate 15 from the rear cover 12, thereby improving the convenience of cleaning the pressure regulating valve 35 and the pressure regulating passage 36.

As shown in Figures 2, 3, and 4, in some embodiments, the pressure regulating seal member 34 comprises a pressure block portion 341 and an arm portion 342 connected to the edge of the pressure block portion 341. The pressure block portion 341 is provided opposite the lifting pressure rod 33 and the pressure regulating valve 35. The lifting pressure rod 33 applies pressure to the pressure regulating valve 35 via the pressure block portion 341. The arm portion 342 is configured to elastically deform when the lifting pressure rod 33 applies pressure to the pressure block portion 341.

Specifically, the pressure block section 341 may optionally be a cylindrical or rectangular block structure. The arm section 342 surrounds the pressure block section 341 and is connected to the side wall of the pressure block section 341. Optionally, the arm section 342 may be made of an elastic material. The side of the arm section 342 away from the pressure block section 341 is connected to the side of the back cover 12 closer to the front cover 11. When the lifting pressure rod 33 moves toward the pressure regulating valve 35 and, after the lifting pressure rod 33 contacts the pressure block section 341, an attempt is made to move the pressure block section 341 toward the pressure regulating valve 35, the arm section 342 deforms, causing the pressure block section 341 to move together with the lifting pressure rod 33.

The aforementioned pressure block section 341 is for receiving the lifting pressure rod 33. Furthermore, the pressure block section 341 contacts the pressure regulating valve 35 and has a diameter larger than the lifting pressure rod 33. When the lifting pressure rod 33 is not applying pressure to the pressure regulating valve 35, the pressure block section 341 is in contact with the pressure regulating valve 35. Of course, selectively, when the lifting pressure rod 33 is not applying pressure to the pressure regulating valve 35, the pressure block section 341 may have one side in contact with the lifting pressure rod 33 and the other side connected to the pressure regulating valve 35.

Selectively, the pressurizing block 341 may be positioned on the side of the mounting through-hole away from the cooking chamber 21 so that it can contact the pressure regulating valve 35 after moving toward it through the mounting through-hole. The arm portion 342 is positioned such that its edge, away from the pressurizing block 341, surrounds the mounting through-hole. The arm portion 342 is also sealed to one side of the surface cover 11 to prevent gas from the cooking chamber 21 from entering the space between the back cover 12 and the surface cover 11 through the mounting through-hole, and to prevent gas from passing through the lifting guide hole 13 and coming into contact with the motor 31, thereby damaging the motor 31.

The pressure regulating seal member 34 is installed to include a pressurized block portion 341 and an arm portion 342 that surrounds the pressurized block portion 341, is connected to the edge of the pressurized block portion 341, and deforms to move the pressurized block portion 341 together with the lifting pressurized rod 33. This configuration allows the pressurized block portion 341 to receive the pressure from the lifting pressurized rod 33, while simultaneously preventing excessive pressure concentration and damage to the pressure regulating valve 35. Furthermore, the arm portion 342 and the pressurized block portion 341 prevent gas from passing through the mounting through-holes and lifting guide holes 13 and coming into contact with the motor 31, thus preventing damage to the motor 31.

Furthermore, as shown in Figures 9 and 10, the lifting pressure rod 33 is located above the pressure block section 341. The lower end surface of the lifting pressure rod 33 abuts against the upper end surface of the pressure block section 341, fitting snugly. This causes the lifting pressure rod 33 to apply a downward force to the pressure block section 341. As a result, when the lifting pressure rod 33 moves downward, it moves the pressure block section 341 downward, applying pressure to the pressure regulating valve 35, which then closes the pressure regulating passage 36.

In a specific embodiment, as shown in Figures 9 and 10, both the pressure regulating valve 35 and the pressure regulating passage 36 may be provided on the movable cover plate 15. The pressure regulating valve 35 comprises a valve body 351 and an elastic member 352 elastically supported between the valve body 351 and the movable cover plate 15. The inlet of the pressure regulating passage 36 forms a pressure regulating port 361 that communicates with the cooking chamber. When the gas pressure in the cooking chamber is relatively low, the valve body 351 of the pressure regulating valve 35 closes the pressure regulating port 361 with the force acting by the lifting and lowering pressurizing rod 33, gradually increasing the gas pressure in the cooking chamber. When the gas pressure inside the cooking chamber is relatively high, and the upward force of the gas pressure on the pressure regulating valve 35 becomes greater than the downward force of the lifting and lowering pressurizing rod 33 on the pressure regulating valve 35, the gas pressure inside the cooking chamber pushes the valve body 351 of the pressure regulating valve 35 upward from the pressure regulating port 361, opening the pressure regulating port 361 and releasing the pressure.

Specifically, the height of the pressure block section 341 along the direction of movement of the lifting pressure rod 33 is greater than the movement stroke of the lifting pressure rod 33. As shown in Figure 10, L is the movement stroke of the lifting pressure rod 33, and H is the height of the pressure block section 341 along the direction of movement of the lifting pressure rod 33. H satisfies the condition H > L. This prevents the arm section 342 of the pressure adjustment seal member 34 from being pressed and damaged by the lifting pressure rod 33 and the pressure adjustment valve 35 during extension and retraction.

Specifically, the ratio of the area of the end face of the pressure block portion 341 that abuts against the lifting pressure rod 33 to the area of the end face of the lifting pressure rod 33 that abuts against the pressure block portion 341 is 0.6 or more, that is, the ratio of the area of the lower end face of the pressure block portion 341 to the upper end face of the lifting pressure rod 33 is 0.6 or more. As shown in Figure 9, S1 represents the area of the end face of the pressure block portion 341 that abuts against the lifting pressure rod 33, and S2 represents the area of the end face of the lifting pressure rod 33 that abuts against the pressure block portion 341, and S1 and S2 satisfy S1/S2 ≥ 0.6. In this way, a sufficient contact area can be secured when the pressure block portion 341 and the lifting pressure rod 33 abut and fit together, and the stability of the pressure applied to the pressure block portion 341 by the lifting pressure rod 33 can be ensured.

In some embodiments, as shown in Figures 9 to 11, the arm portion 342 comprises a first edge bending portion 3421 and a second edge bending portion 3422. The second edge bending portion 3422 surrounds the pressure block portion 341 and is connected to the edge of the pressure block portion 341. One edge of the first edge bending portion 3421 is connected to the edge of the second edge bending portion 3422 that is away from the pressure block portion 341, forming a clamping angle, while the other edge is connected to the region located around the mounting through-hole of the back cover 12.

In this configuration, when the lifting/lowering pressure rod 33 applies pressure to the pressure regulating seal member 34, the angle between the first edge bending portion 3421 and the second edge bending portion 3422 changes, causing the arm portion 342 of the pressure regulating seal member 34 to extend. This allows the pressure block portion 341 of the pressure regulating seal member 34 to apply pressure to the pressure regulating valve 35, moving the pressure regulating valve 35 and closing the pressure regulating passage 36.

Specifically, the ratio of the lengths of the first edge bend portion 3421 to the second edge bend portion 3422 is 0.7 to 0.95. As shown in Figure 11, L1 is the length of the first edge bend portion 3421, and L2 is the length of the second edge bend portion 3422. The relationship between L1 and L2 satisfies 0.95L2 ≥ L1 ≥ 0.7L2.

In other words, the length of the second edge bend portion 3422 is slightly longer than the length of the first edge bend portion 3421, but not significantly longer than the length of the first edge bend portion 3421, and is within a preset ratio range. By limiting the lengths of the first edge bend portion 3421 and the second edge bend portion 3422 to the above range, when steam inside the cookware pushes up the pressure regulating seal member 34, the deformation of the pressure regulating seal member 34 basically appears as an angle change between the first edge bend portion 3421 and the second edge bend portion 3422, and the thickness hardly changes. This avoids the elastic force due to the change in thickness of the pressure regulating seal member 34 and reduces the influence of the change in thickness of the pressure regulating seal member 34 on the pressure regulating drive module and the pressure regulating valve 35. As a result, the pressure regulating valve 35 only needs to consider the fixed weight of the first edge bend portion 3421 and below the pressure regulating seal member 34 during the design phase, which is advantageous in ensuring the pressure regulating accuracy of the pressure regulating drive module and the pressure regulating valve.

As shown in Figures 1 to 6, in some embodiments, the surface cover 11 is provided with a mounting groove 14 that is recessed toward the rear cover 12. The lifting/lowering pressure rod 33 is movably mounted within the mounting groove 14, and the motor 31 is fixedly connected to the inner groove wall of the mounting groove 14.

Specifically, optionally, the surface lid 11 may have a recess on the side opposite to the back lid 12 that faces the cooking chamber 21, forming a mounting groove 14, with a through-hole provided at the bottom of the mounting groove 14 as a lifting guide hole 13. Optionally, a support column may be provided at the bottom of the mounting groove 14, and the motor 31 may be connected to the support column and mounted in the mounting groove 14. By positioning the motor 31 in the mounting groove 14, the mounting groove 14 can protect the motor 31.

Optionally, a through-hole may be provided at the bottom of the mounting groove 14 so that the lifting pressure rod 33 can pass through the through-hole and apply pressure to the pressure regulating valve 35. Of course, optionally, a lifting guide hole 13 and a second stopper portion 42 may be provided at the bottom of the mounting groove 14, and a first stopper portion 41 may be provided on the lifting pressure rod 33, so that the lifting pressure rod 33 passes through the lifting guide hole 13, and the first stopper portion 41 and the second stopper portion 42 are fitted and connected.

The surface cover 11 is recessed toward the cooking chamber 21 to form a mounting groove 14, and the motor 31 is fixedly connected to the inner wall of the mounting groove 14. This mounts the motor 31 to the mounting groove 14, protecting it and avoiding the motor 31 protruding from the surface cover 11, which would make it more susceptible to impact and detract from the aesthetics.

In some other embodiments, the lid body 1 comprises a front lid 11 and a back lid 12 connected to the front lid 11, with the pressure adjustment drive module provided on the back lid 12. That is, in specific embodiments, the pressure adjustment drive module is not limited to the front lid 11, but may be provided on the back lid 12 as needed.

By installing the pressure regulating drive module on the rear cover 12, it is possible to improve pressure control accuracy by avoiding the deformation of the front cover 11 affecting the compression amount of the elastic member in the pressure regulating valve 35, compared to when the pressure regulating drive module is installed on the front cover 11.

Furthermore, the pressure adjustment drive module may be mounted on the side of the rear cover 12 facing the front cover 11. The rear cover 12 is provided with a mounting through-hole corresponding to the lifting/lowering pressure rod 33, and a pressure adjustment sealing member 34 is installed in the mounting through-hole. The pressure adjustment sealing member 34 is connected to the area of the rear cover 12 surrounding the mounting through-hole so as to cover it. The pressure adjustment sealing member 34 is also located between the lifting/lowering pressure rod 33 and the pressure adjustment valve 35, and is configured to elastically deform under the pressure of the lifting/lowering pressure rod 33 in order to apply pressure to the pressure adjustment valve 35.

In specific embodiments, the pressure regulating valve 35 and the pressure regulating drive module are not limited to being provided on two different components of the lid assembly. For example, in the above embodiment, the pressure regulating drive module is provided on either the front lid 11 or the back lid 12, and the pressure regulating valve 35 is provided on the movable lid plate 15. In specific embodiments, the pressure regulating valve 35 and the pressure regulating drive module may be integrated as a single integrated module. This integrated module can be attached entirely to either the front lid 11 or the back lid 12. In this way, problems such as reduced pressure control accuracy due to assembly errors and structural deformation, which occur when the pressure regulating valve 35 and the pressure regulating drive module are attached as separate parts, can be avoided, and insect and moisture-proof effects can also be achieved.

As shown in Figures 5 and 6, in some embodiments, the cover assembly further comprises a first microswitch 51 and a second microswitch 52. The lifting/pressuring rod 33 is provided with a switch trigger unit 333. The switch trigger unit 333 is configured to trigger the operation of the first microswitch 51 when the lifting/pressuring rod 33 moves to a first position in the direction approaching the pressure regulating valve 35, and to trigger the operation of the second microswitch 52 when the lifting/pressuring rod 33 moves to a second position in the direction away from the pressure regulating valve 35.

Specifically, the first microswitch 51 and the second microswitch 52 may be selectively positioned on either side of the lifting pressure rod 33 in a direction perpendicular to the axis of the lifting guide hole 13. The lifting pressure rod 33 may have a projection structure selected as a switch trigger portion 333 for contacting the first microswitch 51 and the second microswitch 52. Selectively, the first position may be a position where the lifting pressure rod 33 is close to the motor 31. In this case, the surfaces of the lifting pressure rod 33 and the motor 31 are in contact, or the screw of the motor 31 is located at the bottom of the mounting screw hole 331. When the first microswitch 51 is triggered, the motor 31 stops the rotational drive of the screw shaft 32, preventing the lifting pressure rod 33 from moving toward the motor 31. The second position may be a position where the lifting pressure rod 33 is spaced away from the motor 31. At this time, the end of the motor 31's screw remains engaged with the opening of the mounting screw hole. However, if the motor 31 continues to rotate and moves the lifting pressure rod 33 away from the motor 31, the connection between the motor 31's screw and the mounting screw hole 331 will be disengaged. When the second microswitch 52 is triggered, the rotation of the motor 31 stops, preventing the lifting pressure rod 33 from moving toward the cooking chamber 21.

The first and second positions represent the positions where the lifting/pressure rod 33 has moved to its limit. That is, if the motor 31 continues to rotate after the lifting/pressure rod 33 has moved to the first position, causing the lifting/pressure rod 33 to continue moving in the direction of the motor 31, the lifting/pressure rod 33 may come into contact with the surface of the motor 31, or the motor 31's screw may rotate to the bottom of the mounting screw hole 331, creating significant resistance and making the motor 31 prone to damage. If the motor 31 continues to rotate after the lifting/pressure rod 33 has moved to the second position, causing the lifting/pressure rod 33 to move towards the pressure regulating valve 35, the connection between the motor 31's screw and the mounting screw hole 331 will be disengaged, making it impossible to drive the lifting/pressure rod 33 by the motor 31's rotation.

Selectively, the first microswitch 51 and the second microswitch 52 may be connected to an alarm. When the first microswitch 51 and the second microswitch 52 are triggered, the alarm sounds an alarm to warn the user. Of course, selectively, the controller may be installed on the cover structure. Selectively, the controller may be a chip or a circuit board. The controller is electrically connected to the motor 31, the first microswitch 51 and the second microswitch 52, and when the first microswitch 51 and the second microswitch 52 are triggered, it sends a signal to the controller, which controls the operation of the motor 31 to stop, thereby stopping the rotation of the screw shaft 32.

The cover assembly further comprises a first microswitch 51 and a second microswitch 52. The lifting pressure rod 33 is provided with a mounting screw hole 331 at one end and a switch trigger portion 333. The switch trigger portion 333 is configured to trigger the operation of the first microswitch 51 when the lifting pressure rod 33 moves to a first position, and to trigger the operation of the second microswitch 52 when the lifting pressure rod 33 moves to a second position. This configuration allows the user to determine whether the lifting pressure rod 33 is moving within a set range using the first and second microswitches 51 and 52, preventing the lifting pressure rod 33 from detaching from the screw shaft 32 or colliding with the motor 31 due to excessive movement, thereby increasing the stability of the pressure adjustment drive module during use.

As shown in Figures 1 and 2, the embodiment of the present application further provides a cooking utensil comprising a main body 2 and a lid assembly described in any of the above embodiments, which is installed on the main body 2 in a manner that allows it to be opened and closed.

Specifically, a cooking chamber 21 is formed in the main body 2, the lid assembly covers the cooking chamber 21, and the pressure regulating valve 35 contacts the gas inside the cooking chamber 21 to control the gas pressure inside the cooking chamber 21.

The main body 2 described above is installed opposite the lid assembly, and the side edge of the lid assembly facing the main body 2 is rotatably connected to the side edge of the main body 2 facing the lid assembly. This allows the lid assembly to rotate toward the main body 2 to cover the cooking chamber 21, and then rotate away from the main body 2 to open the cooking chamber 21.

By using the lid assembly described in any of the above embodiments in the cooking appliance, the torque output from the motor 31 applies pressure to the pressure regulating valve 35 via the lifting and lowering pressurizing rod 33. This reduces losses in the process of power transmission from the motor 31 to the pressure regulating valve 35, improving the accuracy of the lid assembly in regulating the air pressure in the cooking chamber 21 via the pressure regulating valve 35. Furthermore, by positioning the motor 31 away from the cooking chamber 21, the operating temperature can be reduced, extending the lifespan of the motor 31.

In the embodiment of the present invention, the cooking appliance is installed with the main body 2 and the lid assembly facing each other during actual use, and the lid body 1 covers the cooking chamber 21 of the main body 2. When the motor 31 is activated, it rotates the screw shaft 32. The first stopper portion 41 and the second stopper portion 42 fit together so that when the screw shaft 32 is rotated, the lifting pressure rod 33 does not rotate with the screw shaft 32, and the screw shaft 32 drives the lifting pressure rod 33 to move toward the pressure regulating valve 35 by the action of the screw. When the lifting pressure rod 33 comes into contact with the pressure regulating seal member 34, the lifting pressure rod 33 moves the pressure regulating seal member 34 toward the pressure regulating valve 35. After the pressure regulating seal member 34 comes into contact with the pressure regulating valve 35, the pressure from the lifting pressure rod 33 is transmitted to the pressure regulating valve 35, and the pressure regulating valve 35 closes the pressure regulating passage 36 using the pressure applied from the lifting pressure rod 33 as the closing pressure. This controls the gas pressure inside the cooking chamber 21.

In this specification, relational terms such as “first” and “second” are used solely to distinguish one entity or operation from another, and do not necessarily require or imply the existence of any actual relationship or order between these entities or operations. Furthermore, the terms “encompassing,” “including,” or any other variations thereof, mean “including non-exclusively,” so that a process, method, article, or apparatus containing a set of elements may also include other elements not explicitly indicated, or elements specific to such a process, method, article, or apparatus. Where no further restrictions exist, an element limited by the phrase “…including one” does not preclude the existence of another identical element in a process, method, article, or apparatus containing that element.

The above are merely specific embodiments of the present application, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to these embodiments described herein, but rather conforms to the broadest scope of the principles and novel features disclosed herein.

1…Lid body, 11…Front lid, 12…Back lid, 13…Lifting guide hole, 14…Mounting groove, 15…Movable lid plate, 16…Steam valve, 2…Main body, 21…Cooking chamber, 31…Motor, 32…Screw shaft, 33…Lifting pressure rod, 331…Mounting screw hole, 332…Vertical stopper part, 333…Switch trigger part, 34…Pressure adjustment seal member, 341…Pressure block part, 342…Arm part, 3421…First edge bending part, 3422…Second edge bending part, 35…Pressure adjustment valve, 351…Valve body, 352…Elastic member, 36…Pressure adjustment passage, 361…Pressure adjustment port, 41…First stopper part, 42…Second stopper part, 51…First microswitch, 52…Second microswitch.

Claims (8)

A lid body provided with a pressure regulating passage for discharging gas from the cooking chamber of a cooking appliance, wherein one end of the pressure regulating passage communicates with the cooking chamber via a pressure regulating hole, and the other end communicates with the outside of the cooking appliance, and a pressure regulating valve is provided within the pressure regulating passage for closing or opening the pressure regulating hole,
The lid body is provided in correspondence with the pressure regulating valve and includes a pressure regulating drive module for applying pressure to the pressure regulating valve to adjust the closing pressure of the pressure regulating valve relative to the pressure regulating hole,
The lid assembly for a cooking appliance is characterized in that the pressure regulating valve is provided on the side of the pressure regulating passage closest to the pressure regulating hole and comprises a plug for closing or opening the pressure regulating hole and an elastic member provided on the side of the pressure regulating passage away from the pressure regulating hole and connected to the plug, the pressure regulating drive module comprises a motor and a lifting and lowering pressurizing rod, a screw structure is provided at the output end of the motor, the lifting and lowering pressurizing rod is movably provided on the lid body and the lifting and lowering pressurizing rod is screwed into the screw structure, the lifting and lowering pressurizing rod is connected to the elastic member, the motor moves the lifting and lowering pressurizing rod in a direction toward or away from the pressure regulating valve, and the lifting and lowering pressurizing rod applies pressure to the pressure regulating valve. The lid assembly for a cooking utensil according to claim 1, characterized in that a screw shaft is fixedly connected to the motor shaft of the motor, and the screw structure is formed on the outer circumferential surface of the screw shaft. The lid body is provided with a lifting guide hole, and the lifting pressure rod is movably provided in the lifting guide hole.
The lifting guide hole is provided in correspondence with the pressure regulating valve.
The lid assembly of a cooking utensil according to claim 1, characterized in that the lifting and lowering pressurizing rod moves along the lifting and lowering guide hole, passes through the lifting and lowering guide hole, and applies pressure to the pressure regulating valve. A vertical stopper portion is provided on the side of the lifting and pressing rod, located at one end of the lifting and pressing rod away from the pressure regulating valve, when the lifting and pressing rod moves toward the pressure regulating valve to the set position,
The lid assembly for a cooking appliance according to claim 1, characterized in that the vertical stopper portion abuts against the lid body to prevent the lifting pressure rod from coming off the screw structure of the motor. The lid body comprises a front lid and a back lid connected to the front lid, and the pressure adjustment drive module is provided on the front lid.
The rear cover is provided with a mounting through-hole corresponding to the lifting pressure rod.
The mounting through-hole is provided with a pressure-regulating sealing member that is connected to the region of the back cover located around the mounting through-hole and covers the mounting through-hole.
The pressure regulating seal member is located between the lifting and lowering pressurizing rod and the pressure regulating valve.
The lid assembly for a cooking utensil according to any one of claims 1 to 4 , characterized in that the pressure regulating seal member is configured to elastically deform due to the pressure action of the lifting and lowering pressurizing rod and apply pressure to the pressure regulating valve. The lid body comprises a surface lid and a back lid connected to the surface lid.
The lid assembly for a cooking appliance according to any one of claims 1 to 4 , characterized in that the pressure adjustment drive module is provided on the back lid. The pressure adjustment drive module further comprises a first microswitch and a second microswitch,
A switch trigger is provided on the aforementioned lifting pressure rod.
The lid assembly for a cooking appliance according to any one of claims 1 to 4, characterized in that the switch trigger unit is configured to trigger the operation of the first microswitch when the lifting pressure rod moves to a first position in a direction approaching the pressure regulating valve, and to trigger the operation of the second microswitch when the lifting pressure rod moves to a second position in a direction away from the pressure regulating valve. A cooking utensil characterized by comprising a main body and a lid assembly for a cooking utensil according to any one of claims 1 to 4 , which is provided on the main body so as to be openable and closable.