Cooking appliance and control method thereof

Abstract

The present invention provides a cooking utensil and a control method thereof, wherein the cooking utensil comprises: a pot body for holding cooked food; a pot cover, which is arranged on the pot body and has an exhaust passage inside the pot cover; a pressure limiting valve assembly, which cooperates with the exhaust passage, and the pressure limiting valve assembly comprises a pressure limiting valve body and a counterweight; a push-up structure, which comprises a first push-up portion cooperating with the pressure limiting valve body and a second push-up portion cooperating with the counterweight; a driving structure, which drives the push-up structure to move upward, and when the push-up structure moves upward, the second push-up portion pushes the counterweight and the first push-up portion does not cooperate with the pressure limiting valve body, so that the pressure limiting valve body acts on the exhaust passage, and when the push-up structure continues to move upward, the second push-up portion pushes the counterweight while the first push-up portion pushes the pressure limiting valve body, so that the exhaust passage is exhausted. The technical solution of the present invention solves the problems of poor cooking effect and poor cooking flexibility of the electric pressure cooker in the prior art.

Description

Technical Field

[0001] The present invention relates to a cooking utensil, and in particular to an improvement of an exhaust structure of a cooking utensil. Background Art

[0002] Electric pressure cookers are commonly used cooking appliances. A pressure limiting valve is provided in the lid of the electric pressure cooker, and the pressure limiting valve limits the pressure in the cooker to achieve pressure cooking. However, most electric pressure cookers in the prior art can only achieve cooking at one pressure, which results in poor cooking effects for different ingredients and poor cooking flexibility. Summary of the invention

[0003] The main purpose of the present invention is to provide a cooking appliance and a control method thereof, so as to solve the problems of poor cooking effect and poor cooking flexibility of the electric pressure cooker in the prior art.

[0004] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a cooking utensil is provided, comprising: a pot body for holding cooked food; a pot cover, which is arranged on the pot body and has an exhaust passage arranged in the pot cover; a pressure limiting valve assembly, which cooperates with the exhaust passage, and the pressure limiting valve assembly includes a pressure limiting valve body and a counterweight; a pushing structure, which is arranged below the pressure limiting valve body and the counterweight, and includes a first pushing top portion cooperating with the pressure limiting valve body and a second pushing top portion cooperating with the counterweight; a driving structure, which drives the pushing structure to move upward, and when the pushing structure moves upward, the second pushing top portion pushes the counterweight and the first pushing top portion does not cooperate with the pressure limiting valve body, so that the pressure limiting valve body acts on the exhaust passage, and when the pushing structure continues to move upward, the second pushing top portion pushes the counterweight and the first pushing top portion pushes the pressure limiting valve body at the same time, so that the exhaust passage is exhausted.

[0005] By applying the technical solution of the present invention, when the pushing structure does not move upward, the first pushing top part does not cooperate with the pressure-limiting valve body, and the second pushing top part does not cooperate with the counterweight. At this time, the counterweight and the pressure-limiting valve body act on the exhaust channel together, and the pressure in the pot is relatively high. After the pushing structure moves upward a certain distance, the second pushing top part pushes the counterweight. At this time, the pressure-limiting valve body acts on the exhaust channel, and the pressure in the pot is relatively low. The above structure enables the cooking utensil to achieve pressure regulation at both ends, so different cooking pressures can be selected for different foods, and the cooking effect is better. At the same time, the cooking utensil can select different cooking pressures at different cooking stages, thereby making the cooking process more flexible. Therefore, the technical solution of the present invention solves the problems of poor cooking effect and poor cooking flexibility of the electric pressure cooker in the prior art.

[0006] Further, there is a height difference between an upper surface of the first pushing portion and an upper surface of the second pushing portion.

[0007] Further, when the pressure-limiting valve body and the counterweight block are not subjected to the force of the ejection structure, there is a height difference or the lower surface of the pressure-limiting valve body and the lower surface of the counterweight block are flush.

[0008] Furthermore, the ejection structure also includes an ejection sleeve, which includes a first sleeve and a second sleeve connected to each other, the second sleeve is sleeved outside the first sleeve, the first sleeve forms a first ejection part, and the second sleeve forms a second ejection part.

[0009] Furthermore, a push-up convex rib is provided at the upper end of the second sleeve, and the upper end of the push-up convex rib protrudes from the upper end of the first sleeve.

[0010] Furthermore, the ejection structure also includes a mounting seat arranged at the lower end of the ejection sleeve, a rotary lifting mechanism is arranged between the ejection sleeve and the mounting seat, the driving structure drives the ejection sleeve or the mounting seat to rotate, and the rotary lifting mechanism converts the rotational motion of the ejection sleeve or the mounting seat into a linear motion of the ejection sleeve along the up and down directions.

[0011] Furthermore, the mounting seat includes an annular side wall with a notch, and the rotary lifting mechanism includes a lifting slope formed on the side wall of the notch and a lifting rib arranged at the lower end of the push sleeve, and the lifting rib is embedded in the notch.

[0012] Furthermore, the lower end of the first sleeve protrudes from the lower end of the second sleeve, and the push sleeve also includes a connecting wall, which is connected between the lower end of the second sleeve and the side wall of the first sleeve. The lifting rib is arranged on the lower surface of the connecting wall, and the lower end of the first sleeve cooperates with the mounting seat.

[0013] Furthermore, the mounting seat also includes a guide sleeve, which is nested with the lower end of the first sleeve, and the annular side wall surrounds the outside of the guide sleeve.

[0014] Furthermore, a push handle is provided on the outer wall of the second sleeve, the push handle includes a connecting column, the driving structure is a driving motor, and the cooking utensil also includes a connecting rod, the first end of the connecting rod is connected to the motor shaft of the driving motor, and the second end of the connecting rod is provided with a connecting hole, and the connecting column is passed through the connecting hole.

[0015] Furthermore, the pot cover includes an inner lining, a surface cover arranged on the inner lining, and a locking cover arranged below the inner lining, the locking cover is provided with cover teeth, and the pot body is provided with pot teeth, and the cooking utensil also includes an opening cover structure arranged on the pot cover, the opening cover structure is connected to the locking cover, and rotating the opening cover structure can drive the locking cover to rotate so that the cover teeth and the pot teeth are locked or misaligned, wherein the mounting seat is fixedly arranged on the locking cover, and when the locking cover rotates, the locking cover drives the mounting seat to rotate, and causes the pushing sleeve to move upward and push the pressure limiting valve body and the counterweight block to exhaust the exhaust channel.

[0016] Furthermore, the exhaust channel is an exhaust pipe arranged at the center of the lock cover, a positioning protrusion is arranged on the outer wall of the exhaust pipe, a mounting hole is arranged on the bottom wall of the mounting seat, the lower end of the exhaust pipe passes through the mounting hole and is connected to the lock cover, and the bottom wall of the mounting seat is clamped between the positioning protrusion and the upper surface of the lock cover.

[0017] Furthermore, the cooking appliance is an electric pressure cooker.

[0018] According to another aspect of the present invention, a control method for a cooking appliance is provided, and the cooking appliance is the above-mentioned cooking appliance, and the control method comprises: step S1: a first pushing top portion does not cooperate with a pressure-limiting valve body and a second pushing top portion does not cooperate with a counterweight block, so that a first preset pressure is reached in a pot body; step S2: the pushing top structure moves upward to a first preset position, the second pushing top portion pushes the counterweight block and the first pushing top portion does not cooperate with the pressure-limiting valve body, so that the pressure in the pot body drops from the first preset pressure to a second preset pressure; step S3: the pushing top structure continues to move upward to a second preset position, the second pushing top portion pushes the counterweight block and the first pushing top portion pushes the pressure-limiting valve body, so that the exhaust passage is exhausted.

[0019] Further, the first preset pressure is in the range of 60 KPa to 100 KPa, and the second preset pressure is in the range of 20 KPa to 40 KPa. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0021] Figure 1 A schematic structural diagram of an embodiment of a cooking utensil according to the present invention is shown;

[0022] Figure 2 Shows Figure 1 An exploded schematic diagram of a pot lid of a cooking utensil;

[0023] Figure 3 Shows Figure 2 The enlarged schematic diagram at A in the middle;

[0024] Figure 4 Shows Figure 1 An exploded schematic diagram of a pressure limiting valve assembly and a push-up structure of a cooking appliance;

[0025] Figure 5 Shows Figure 1 A schematic diagram of the internal structure of a pot lid of a cooking utensil;

[0026] Figure 6 Shows Figure 5 The enlarged schematic diagram of point B in the middle;

[0027] Figure 7 Shows Figure 5 The enlarged schematic diagram at C in the middle;

[0028] Figure 8 Shows Figure 1 A schematic front view of a push sleeve of a cooking utensil;

[0029] Fig. 9 Shows Figure 1 A schematic cross-sectional view of a push sleeve of a cooking utensil;

[0030] Fig.10 Shows Figure 1 A three-dimensional schematic diagram of a push sleeve of a cooking utensil;

[0031] Fig.11 Shows Figure 1 A three-dimensional schematic diagram of another viewing angle of the ejection sleeve of the cooking utensil;

[0032] Fig.12 Shows Figure 1 A schematic front view of a mounting base for a cooking utensil;

[0033] Fig.13 Shows Figure 1 A schematic cross-sectional view of a mounting base for a cooking utensil;

[0034] Fig.14 Shows Figure 1 A three-dimensional schematic diagram of a mounting base for a cooking utensil;

[0035] Fig.15 Shows Figure 1 A schematic structural diagram of the mounting base of the cooking utensil from another perspective;

[0036] Fig.16 Shows Figure 1 A schematic top view of the inner lining of a cooking utensil;

[0037] Fig.17 Shows Fig.16 The enlarged schematic diagram at D in the middle;

[0038] Fig.18 Shows Figure 1 A schematic diagram of the structure of the inner lining of the cooking utensil when the push-up structure is in the initial position;

[0039] Fig.19 Shows Fig.18 A schematic cross-sectional view of a cooking utensil;

[0040] Fig. 20 Shows Fig.19 The enlarged schematic diagram at E in the middle;

[0041] Fig.21 Shows Fig.18 A schematic diagram of the coordination of the pressure limiting valve assembly and the ejection structure of the cooking utensil;

[0042] Fig. 22 Shows Figure 1 A schematic diagram of the structure of the inner lining of the cooking utensil when the push-up structure rises to a first preset position;

[0043] Fig.23 Shows Fig. 22 A schematic cross-sectional view of a cooking utensil;

[0044] Fig.24 Shows Fig.23 The enlarged schematic diagram at F in the middle;

[0045] Fig.25 Shows Fig. 22 A schematic diagram of the coordination of the pressure limiting valve assembly and the ejection structure of the cooking utensil;

[0046] Fig.26 Shows Figure 1 A schematic diagram of the structure of the lining of the cooking utensil when the push-up structure rises to a second preset position;

[0047] Fig. 27 Shows Fig.26 A schematic cross-sectional view of a cooking utensil;

[0048] Fig.28 Shows Fig. 27 The enlarged schematic diagram at G in the middle; and

[0049] Fig.29 Shows Fig.26 A schematic diagram of the coordination of the pressure limiting valve assembly and the ejection structure of the cooking utensil;

[0050] The above drawings include the following reference numerals:

[0051] 10. pot body; 11. pot teeth; 20. pot cover; 21. lining; 22. surface cover; 23. locking cover; 231. cover teeth; 30. exhaust channel; 31. positioning convex edge; 40. pressure limiting valve assembly; 41. pressure limiting valve body; 42. counterweight; 50. push-up structure; 51. first push-up part; 52. second push-up part; 53. push-up sleeve; 531. first sleeve; 532. second sleeve; 533. push-up convex rib; 534. connecting wall; 54. mounting seat; 541. annular side wall; 542. notch; 543. guide sleeve; 544. mounting hole; 55. push handle; 551. connecting column; 60. rotary lifting mechanism; 61. lifting inclined plane; 62. lifting convex rib; 70. connecting rod; 71. connecting hole; 80. cover opening structure; 90. driving structure. DETAILED DESCRIPTION

[0052] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0053] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0054] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0055] like Figure 1 and Figure 2 ,as well as Figure 8 and Fig. 9 As shown, the cooking utensil of this embodiment includes a pot body 10, a pot cover 20, a pressure limiting valve assembly 40, a push-up structure 50 and a driving structure 90. The pot body 10 is used to hold the food to be cooked. The pot cover 20 is arranged on the pot body 10, and an exhaust passage 30 is arranged in the pot cover 20. The pressure limiting valve assembly 40 cooperates with the exhaust passage 30. The pressure limiting valve assembly 40 includes a pressure limiting valve body 41 and a counterweight 42. The push-up structure 50 is arranged below the pressure limiting valve body 41 and the counterweight 42, and the push-up structure 50 includes a first push-up portion 51 that cooperates with the pressure limiting valve body 41 and a second push-up portion 52 that cooperates with the counterweight 42. The driving structure 90 drives the push-up structure 50 to move upward. When the push-up structure 50 moves upward, the second push-up portion 52 pushes the counterweight 42 and the first push-up portion 51 does not cooperate with the pressure limiting valve body 41, so that the pressure limiting valve body 41 acts on the exhaust passage 30. When the pushing structure 50 continues to move upward, the second pushing portion 52 pushes the counterweight 42 while the first pushing portion 51 pushes the pressure limiting valve body 41 to exhaust the exhaust passage 30 .

[0056] By applying the technical solution of this embodiment, when the push-up structure 50 does not move upward, the first push-up portion 51 does not cooperate with the pressure-limiting valve body 41, and the second push-up portion 52 does not cooperate with the counterweight 42. At this time, the counterweight 42 and the pressure-limiting valve body 41 act on the exhaust channel 30 together, and the pressure in the pot body 10 is relatively high. After the push-up structure 50 moves upward for a certain distance, the second push-up portion 52 pushes the counterweight 42. At this time, the pressure-limiting valve body 41 acts on the exhaust channel 30, and the pressure in the pot body 10 is relatively low. The above structure can enable the cooking utensil to achieve pressure regulation at both ends, so different cooking pressures can be selected for different foods, and the cooking effect is better. At the same time, the cooking utensil can select different cooking pressures at different cooking stages, thereby making the cooking process more flexible. Therefore, the technical solution of this embodiment solves the problem of poor cooking effect and poor cooking flexibility of the electric pressure cooker in the prior art.

[0057] It should be noted that from Figure 3 It can be seen that the counterweight 42 is a sleeve structure with an open lower end and a closed upper end. The counterweight 42 is sleeved outside the pressure-limiting valve body 41. When the push-up structure 50 does not move upward and is in the initial position, the counterweight 42 is supported by the pressure-limiting valve body 41, so that the counterweight 42 and the pressure-limiting valve body 41 act on the exhaust passage 30 together. When the push-up structure 50 moves upward, the second push-up portion 52 pushes the counterweight 42, and at this time the pressure-limiting valve body 41 does not support the counterweight 42, that is, only the pressure-limiting valve body 41 acts on the exhaust passage 30.

[0058] like Figure 8 and Fig. 9 As shown, in the technical solution of this embodiment, there is a height difference between the upper surface of the first pushing part 51 and the upper surface of the second pushing part 52. Specifically, the upper end of the second pushing part 52 in this embodiment is higher than the upper end of the first pushing part 51. Therefore, when the pushing structure 50 is in the process of rising, the second pushing part 52 pushes the counterweight 42 first, and then the first pushing part 51 pushes the pressure limiting valve body 41, so as to realize the pushing in a predetermined order.

[0059] Of course, in order to achieve the effect of "the second pushing portion 52 first pushes the counterweight 42, and then the first pushing portion 51 pushes the pressure-limiting valve body 41", other settings can be used. For example, in an embodiment not shown, when the pressure-limiting valve body 41 and the counterweight 42 are not subjected to the force of the pushing structure 50, there is a height difference between the lower surface of the pressure-limiting valve body 41 and the lower surface of the counterweight 42. Specifically, the lower surface of the counterweight 42 is lower than the lower surface of the pressure-limiting valve body 41. In this case, the upper surface of the first pushing portion 51 and the upper surface of the second pushing portion 52 can be flush.

[0060] like Figures 8 to 11As shown, in the technical solution of this embodiment, the push-up structure 50 also includes a push-up sleeve 53, which includes a first sleeve 531 and a second sleeve 532 connected to each other, the second sleeve 532 is sleeved outside the first sleeve 531, the first sleeve 531 forms a first push-up portion 51, and the second sleeve 532 forms a second push-up portion 52. Specifically, the first sleeve 531 and the second sleeve 532 are both annular sleeve structures, and the diameter of the second sleeve 532 is greater than the diameter of the first sleeve 531. The upper edge of the first sleeve 531 cooperates with the lower edge of the pressure limiting valve body 41. The upper edge of the second sleeve 532 cooperates with the counterweight 42.

[0061] like Figures 8 to 11 As shown, in the technical solution of this embodiment, a push-up rib 533 is provided at the upper end of the second sleeve 532, and the upper end of the push-up rib 533 protrudes from the upper end of the first sleeve 531. Specifically, the push-up rib 533 cooperates with the lower edge of the counterweight 42. Preferably, a plurality of push-up ribs 533 are provided along the circumference of the second sleeve 532.

[0062] like Figures 12 to 15 As shown, in the technical solution of this embodiment, the ejection structure 50 also includes a mounting seat 54 arranged at the lower end of the ejection sleeve 53, and a rotating lifting mechanism 60 is arranged between the ejection sleeve 53 and the mounting seat 54. The driving structure 90 drives the ejection sleeve 53 or the mounting seat 54 to rotate, and the rotating lifting mechanism 60 converts the rotational motion of the ejection sleeve 53 or the mounting seat 54 into a linear motion of the ejection sleeve 53 along the up and down direction. Specifically, in this embodiment, the driving structure 90 drives the ejection sleeve 53 to rotate, and the mounting seat 54 is fixedly arranged in the pot cover 20. When the driving structure 90 drives the ejection sleeve 53 to rotate, the rotating lifting mechanism 60 converts the rotational motion of the ejection sleeve into an upward or downward linear motion.

[0063] like Fig.11 and Fig.14 As shown, in the technical solution of this embodiment, the mounting seat 54 includes an annular side wall 541, and a notch 542 is provided on the annular side wall 541. The rotary lifting mechanism 60 includes a lifting inclined surface 61 formed on the side wall of the notch 542 and a lifting rib 62 provided at the lower end of the ejection sleeve 53, and the lifting rib 62 is embedded in the notch 542. Specifically, when the ejection sleeve 53 is in the initial position, the lower end of the lifting rib 62 is located at the lowermost end of the lifting inclined surface 61. When the driving structure 90 drives the ejection sleeve 53 to rotate, the lower end of the lifting rib 62 slides on the lifting inclined surface 61, so that the ejection sleeve 53 moves upward. Of course, the above-mentioned rotary lifting mechanism 60 is not limited to the form of the lifting inclined surface 61 and the lifting rib 62, and the rotary lifting mechanism 60 can also be other structures, such as a threaded structure.

[0064] like Figure 5and Figure 7 As shown, in the technical solution of this embodiment, the lower end of the first sleeve 531 protrudes from the lower end of the second sleeve 532, and the ejection sleeve 53 further includes a connecting wall 534, which is connected between the lower end of the second sleeve 532 and the side wall of the first sleeve 531, and the lifting rib 62 is arranged on the lower surface of the connecting wall 534, and the lower end of the first sleeve 531 cooperates with the mounting seat 54. Specifically, the connecting wall 534 is an annular structure.

[0065] like Figure 5 and Figure 7 As shown, in the technical solution of this embodiment, the mounting seat 54 further includes a guide sleeve 543, which is nested with the lower end of the first sleeve 531, and the annular side wall 541 surrounds the outside of the guide sleeve 543. Specifically, the guide sleeve 543 is sleeved outside the first sleeve 531, so as to guide the rotation of the ejection sleeve 53. When the ejection sleeve 53 is in the initial position, the upper end of the annular side wall 541 and the upper end of the guide sleeve 543 are both in contact with the lower surface of the connecting wall 534.

[0066] like Figure 5 and Figure 6 As shown, in the technical solution of this embodiment, a push handle 55 is provided on the outer side wall of the second sleeve 532, and the push handle 55 includes a connecting column 551. The driving structure 90 is a driving motor. The cooking appliance also includes a connecting rod 70. The first end of the connecting rod 70 is connected to the motor shaft of the driving motor. The second end of the connecting rod 70 is provided with a connecting hole 71, and the connecting column 551 is penetrated in the connecting hole 71. Specifically, when the driving motor is running, the motor shaft rotates and drives the connecting rod 70 to swing, and when the connecting rod 70 swings, it drives the push sleeve 53 to rotate. Preferably, the connecting hole 71 is a long hole to prevent the connecting column 551 and the connecting hole 71 from getting stuck when the connecting rod 70 swings.

[0067] like Figure 4 and Figure 5As shown, in the technical solution of this embodiment, the pot cover 20 includes an inner lining 21, a surface cover 22 covered on the inner lining 21, and a locking cover 23 arranged below the inner lining 21. Among them, a cover tooth 231 is arranged on the locking cover 23, and a pot tooth 11 is arranged on the pot body 10. The cooking utensil also includes an opening structure 80 arranged on the pot cover 20, and the opening structure 80 is connected to the locking cover 23. Rotating the opening structure 80 can drive the locking cover 23 to rotate, so that the cover tooth 231 and the pot tooth 11 are locked or misaligned. The mounting seat 54 is fixedly arranged on the locking cover 23. When the locking cover 23 rotates, the locking cover 23 drives the mounting seat 54 to rotate, and the pushing sleeve 53 moves upward and pushes the pressure limiting valve body 41 and the counterweight 42 to exhaust the exhaust channel 30. Specifically, the opening structure 80 includes an opening handle located on the surface cover 22 and an opening rotating rod located in the inner lining 21. The two are coaxially connected, and the opening rotating rod is connected to the locking cover 23. When the user turns the cover opening handle and rotates the lock cover 23 to the locking position, the cover teeth 231 and the pot teeth 11 are locked with each other and the cover cannot be opened at this time, so as to ensure cooking safety. Further, after cooking is finished, the temperature and pressure in the pot body 10 are high. If the cover is opened at this time, the user may be scalded. Therefore, in the structure of this embodiment, after cooking is finished, when the user rotates the cover opening handle to open the cover, the lock cover 23 is driven to rotate, and the mounting seat 54 fixed on the lock cover 23 is driven to rotate. Since the position of the push sleeve 53 is fixed by the connecting rod 70, the position of the lifting rib 62 on the lifting inclined surface 61 changes, thereby causing the push sleeve 53 to move upward. When the push sleeve 53 moves upward, the second push part 52 pushes the counterweight 42, and the first push part 51 pushes the pressure limiting valve body 41. Then, the exhaust channel 30 is exhausted, the pressure and temperature in the pot body 10 are reduced, and the cover is opened safely. Furthermore, those skilled in the art may adaptively design the slope of the lifting slope 61 and the angle at which the locking cover 23 rotates when the cover is opened, so as to achieve the effect of exhausting air while the cover is opened.

[0068] On the other hand, when the food in the pot body 10 cools down, the pressure decreases and negative pressure may occur, which may easily cause the lid to be unable to be opened. The above structure allows the exhaust channel 30 to be opened before the lid is opened, so that the pot body 10 is connected with the outside and the pressure is balanced, preventing the lid from being unable to be opened.

[0069] like Figure 4 and Fig. 20 As shown, in the technical solution of this embodiment, the exhaust channel 30 is an exhaust pipe arranged at the center of the lock cover 23, a positioning protrusion 31 is arranged on the outer wall of the exhaust pipe, a mounting hole 544 is arranged on the bottom wall of the mounting seat 54, the lower end of the exhaust pipe passes through the mounting hole 544 and is connected to the lock cover 23, and the bottom wall of the mounting seat 54 is clamped between the positioning protrusion 31 and the upper surface of the lock cover 23.

[0070] According to the above structure, the control process of the cooking pressure of the cooking appliance in this embodiment will be described below:

[0071] First, from Fig.16 and Fig.17 It can be seen that the swing of the connecting rod 70 in the present application has a certain swing range, and the swing range of the connecting rod 70 is displayed by setting limit columns at both ends of the connecting rod 70. Fig.17 The solid line part and the dotted line part of the middle connecting rod 70 illustrate the swing range of the connecting rod 70. Further, Fig.17 The realization profile of the middle link 70 shows the initial position of the link 70 , which is assumed to be the 0° position of the swing of the link 70 .

[0072] like Figures 18 to 21 As shown, when the motor shaft of the driving motor rotates and the swing range of the connecting rod 70 is within the range of 0° to 13°, the first pushing portion 51 does not contact the pressure limiting valve body 41, and the second pushing portion 52 does not contact the counterweight 42. The pressure limiting valve body 41 and the counterweight 42 act on the exhaust passage 30 together.

[0073] like Figure 22 to Figure 25 As shown, when the motor shaft of the driving motor rotates and the swing range of the connecting rod 70 is within the range of 13° to 26°, the first pushing portion 51 does not contact the pressure limiting valve body 41, and the second pushing portion 52 pushes the counterweight 42. At this time, the pressure limiting valve body 41 acts on the exhaust passage 30.

[0074] like Figure 26 to Figure 29 As shown, when the motor shaft of the driving motor rotates and the swing range of the connecting rod 70 is within the range of 26° to 30°, the first pushing portion 51 pushes the pressure limiting valve body 41, and the second pushing portion 52 pushes the counterweight 42. At this time, the pressure limiting valve body 41 and the counterweight 42 do not act on the exhaust channel 30. At this time, the exhaust channel 30 is exhausted. Further, when the above-mentioned locking cover 23 rotates from the locking position to the unlocking position, the angle required can be designed to be within the range of 26° to 30° to achieve the exhaust effect when the cover is opened.

[0075] Preferably, the cooking utensil in this embodiment is an electric pressure cooker.

[0076] The present application also provides a control method for a cooking appliance, the cooking appliance being the above-mentioned cooking appliance, and the control method comprises:

[0077] Step S1: The first push portion 51 does not cooperate with the pressure limiting valve body 41 and the second push portion 52 does not cooperate with the counterweight 42, so that the first preset pressure is reached in the pot body 10;

[0078] Step S2: the pushing structure 50 moves upward to the first preset position, the second pushing portion 52 pushes the counterweight 42 and the first pushing portion 51 does not cooperate with the pressure limiting valve body 41, so that the pressure in the pot body 10 drops from the first preset pressure to the second preset pressure;

[0079] Step S3 : the pushing structure 50 continues to move upward to the second preset position, the second pushing portion 52 pushes the counterweight 42 and the first pushing portion 51 pushes the pressure limiting valve body 41 to exhaust the exhaust passage 30 .

[0080] Furthermore, in step S1, the push sleeve 53 is in Fig. 20 The first preset position of the ejection sleeve 53 is Fig.24 The second preset position of the ejector sleeve 53 is Fig.28 The location shown in .

[0081] Preferably, the first preset pressure is in the range of 60 KPa to 100 KPa, and the second preset pressure is in the range of 20 KPa to 40 KPa.

[0082] The control method can achieve continuous exhaust boiling cooking under two pressure conditions, thereby achieving better cooking effect. Further, when the pressure in the pot body 10 is at the first preset pressure, it is suitable for cooking rice. When the pressure in the pot body 10 is at the second preset pressure, other ingredients can be cooked.

[0083] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0084] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0085] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0086] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0087] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cooking utensil, characterized in that: include: A pot body (10) is used to hold food to be cooked, and a heating device is arranged inside the pot body (10); A pot cover (20) is arranged on the pot body (10), and an exhaust passage (30) is arranged in the pot cover (20); A pressure limiting valve assembly (40) cooperates with the exhaust passage (30), the pressure limiting valve assembly (40) comprising a pressure limiting valve body (41) and a counterweight (42); A push-up structure (50), the push-up structure (50) being arranged below the pressure-limiting valve body (41) and the counterweight block (42), the push-up structure (50) comprising a first push-up portion (51) cooperating with the pressure-limiting valve body (41) and a second push-up portion (52) cooperating with the counterweight block (42); A driving structure (90), wherein the driving structure (90) drives the pushing structure (50) to move upward, and when the pushing structure (50) moves upward, the second pushing part (52) pushes the counterweight block (42) and the first pushing part (51) does not cooperate with the pressure-limiting valve body (41), so that the pressure-limiting valve body (41) acts on the exhaust channel (30), and when the pushing structure (50) continues to move upward, the second pushing part (52) pushes the counterweight block (42) and the first pushing part (51) pushes the pressure-limiting valve body (41) at the same time, so that the exhaust channel (30) is exhausted.

2. The cooking device according to claim 1, characterized in that: There is a height difference between the upper surface of the first pushing portion (51) and the upper surface of the second pushing portion (52).

3. The cooking device according to claim 1, characterized in that: When the pressure-limiting valve body (41) and the counterweight block (42) are not subjected to the force of the push-up structure (50), there is a height difference or a flush relationship between the lower surface of the pressure-limiting valve body (41) and the lower surface of the counterweight block (42).

4. The cooking device according to claim 2 or 3, characterized in that: The push-up structure (50) further comprises a push-up sleeve (53), wherein the push-up sleeve (53) comprises a first sleeve (531) and a second sleeve (532) which are connected to each other, wherein the second sleeve (532) is sleeved outside the first sleeve (531), the first sleeve (531) forms the first push-up part (51), and the second sleeve (532) forms the second push-up part (52).

5. The cooking device according to claim 4, characterized in that: The upper end of the second sleeve (532) is provided with a push-up convex rib (533), and the upper end of the push-up convex rib (533) protrudes from the upper end of the first sleeve (531).

6. The cooking device according to claim 4, characterized in that: The ejection structure (50) further comprises a mounting seat (54) arranged at the lower end of the ejection sleeve (53); a rotary lifting mechanism (60) is arranged between the ejection sleeve (53) and the mounting seat (54); the driving structure (90) drives the ejection sleeve (53) or the mounting seat (54) to rotate; and the rotary lifting mechanism (60) converts the rotational motion of the ejection sleeve (53) or the mounting seat (54) into a linear motion of the ejection sleeve (53) in an up-and-down direction.

7. The cooking device according to claim 6, characterized in that: The mounting seat (54) comprises an annular side wall (541) on which a notch (542) is arranged. The rotary lifting mechanism (60) comprises a lifting inclined surface (61) formed on the side wall of the notch (542) and a lifting convex rib (62) arranged at the lower end of the ejection sleeve (53). The lifting convex rib (62) is embedded in the notch (542).

8. The cooking device according to claim 7, characterized in that: The lower end of the first sleeve (531) protrudes from the lower end of the second sleeve (532), and the push sleeve (53) also includes a connecting wall (534), which is connected between the lower end of the second sleeve (532) and the side wall of the first sleeve (531), and the lifting rib (62) is arranged on the lower surface of the connecting wall (534), and the lower end of the first sleeve (531) cooperates with the mounting seat (54).

9. The cooking device according to claim 8, characterized in that: The mounting seat (54) further comprises a guide sleeve (543), wherein the guide sleeve (543) is nested with the lower end of the first sleeve (531), and the annular side wall (541) surrounds the guide sleeve (543).

10. The cooking appliance according to claim 4, characterized in that A push handle (55) is provided on the outer wall of the second sleeve (532), and the push handle (55) includes a connecting column (551). The driving structure (90) is a driving motor. The cooking appliance also includes a connecting rod (70), and the first end of the connecting rod (70) is connected to the motor shaft of the driving motor. The second end of the connecting rod (70) is provided with a connecting hole (71), and the connecting column (551) is inserted into the connecting hole (71).

11. The cooking appliance according to claim 6, characterized in that The pot cover (20) comprises an inner lining (21), a surface cover (22) arranged on the inner lining (21), and a locking cover (23) arranged below the inner lining (21); the locking cover (23) is provided with a cover tooth (231); the pot body (10) is provided with a pot tooth (11); the cooking utensil further comprises a cover opening structure (80) arranged on the pot cover (20); the cover opening structure (80) is connected to the locking cover (23); the locking cover (23) can be driven to rotate by rotating the cover opening structure (80) so that the cover tooth (231) and the pot tooth (11) are locked or dislocated with each other; The mounting seat (54) is fixedly arranged on the locking cover (23); when the locking cover (23) rotates, the locking cover (23) drives the mounting seat (54) to rotate, and causes the pushing sleeve (53) to move upward and push the pressure-limiting valve body (41) and the counterweight block (42) to exhaust the exhaust passage (30).

12. The cooking device according to claim 11, characterized in that: The exhaust passage (30) is an exhaust pipe arranged at the center of the locking cover (23); a positioning protrusion (31) is arranged on the outer wall of the exhaust pipe; a mounting hole (544) is arranged on the bottom wall of the mounting seat (54); the lower end of the exhaust pipe passes through the mounting hole (544) and is connected to the locking cover (23); and the bottom wall of the mounting seat (54) is sandwiched between the positioning protrusion (31) and the upper surface of the locking cover (23).

13. The cooking device according to claim 1, characterized in that The cooking utensil is an electric pressure cooker.

14. A method for controlling a cooking appliance, characterized in that: The cooking appliance is the cooking appliance according to any one of claims 1 to 13, and the control method comprises: Step S1: the first pushing portion (51) does not cooperate with the pressure-limiting valve body (41) and the second pushing portion (52) does not cooperate with the counterweight (42), so that a first preset pressure is reached in the pot body (10); Step S2: the pushing structure (50) moves upward to a first preset position, the second pushing portion (52) pushes the counterweight (42) and the first pushing portion (51) does not cooperate with the pressure-limiting valve body (41), so that the pressure in the pot body (10) drops from the first preset pressure to a second preset pressure; Step S3: the pushing structure (50) continues to move upward to a second preset position, the second pushing portion (52) pushes the counterweight block (42) and the first pushing portion (51) pushes the pressure limiting valve body (41) to exhaust the exhaust passage (30).

15. The control method according to claim 14, characterized in that: The first preset pressure is in the range of 60 KPa to 100 KPa, and the first preset pressure is in the range of 20 KPa to 40 KPa.

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