Patent Description:
In the relevant art, a pressure cooker has the feature of increasing the pressure inside the cooker and thus increasing the cooking temperature. It is widely used for cooking food that is tough to cook. Based on the heating method, pressure cookers can be classified into pressure cookers used on an open fire and electric pressure cookers. Among them, pressure cookers used on an open fire have the advantage of being not bulky. Electric pressure cookers are more bulky but have a temperature control system and are equipped with abundant cooking programs, which improves food cooking effects.

The pressure-bearing structure of a pressure cooker in the relevant art is generally composed of pot flanging buckles and lid flanging buckles which cooperate with each other. The process of flanging is complicated. In addition, the provision of flanging buckles affects the esthetics of the cooker. Conventional electric pressure cookers have a large overall volume and will occupy a relatively large kitchen space. <CIT> shows a cooking vessel comprising a pot, a lid covering the pot and a locking structure arranged between the lid and the pot, wherein the locking structure comprises a first thread provided on the pot and a second thread provided on the lid, the second thread cooperating with the first thread and wherein the first thread and the second thread are trapezoidal threads.

The main objective of the present invention is to provide a cooking utensil so as to solve the problem in the relevant art that the process of flanging is complicated. The problem is solved by a cooking utensil comprising the features of claim <NUM>. Preferred embodiments are claimed in the dependent claims.

To this end, the present invention provides a cooking utensil, comprising: a pot; a lid covering the pot; and, a locking structure provided between the lid and the pot, the locking structure comprising a first thread provided on the pot and a second thread provided on the lid, the second thread cooperating with the first thread, wherein: a first connecting line L1 between a first end of the first thread and a center of the pot forms a first angle n with a second connecting line L2 between a second end of the first thread and the center of the pot, the first angle n satisfying: <NUM>° ≤ n ≤ <NUM>° , so that the first thread has a length between half a turn and one turn of a circumference of the pot; the first thread and the second thread are trapezoidal threads, the first thread has a thread angle d1 that satisfies: <NUM>° ≤ d1 ≤ <NUM>° , and the second thread has a thread angle d2 that satisfies: <NUM>° ≤ d2 ≤ <NUM>°.

The locking of the pot and the lid is achieved by the cooperation between the first thread and the second thread. Moreover, the above-mentioned first angle n makes the user's screwing angle smaller during operation, which is convenient for the user to open and close the lid. Moreover, providing trapezoidal threads and selecting the above-mentioned thread angle value ensure the locking effect of the first thread and the second thread, thereby ensuring the safety of the cooking utensil in pressurized state. Therefore, the technical solution of the present application can well take into account the convenience of user operation and the pressurization safety at the same time. In addition, thread processing is simple, cheap and can provide good locking effect. Further, compared with the flanging process in the relevant art, thread processing does not need to cut a large amount of material to form spaced notches to achieve the fit between the pot and the lid, so it is rather simple and the obtained connection strength is higher. Therefore, the technical solution of the present application effectively solves the problem in the relevant art that the process of flanging is complicated.

Further, the first angle n satisfies: <NUM>° ≤ n ≤ <NUM>°. With this value, the user operation convenience and pressurization safety can be further improved.

Further, the first thread has a tooth height c1 that satisfies: <NUM> ≤ c1 ≤ <NUM>, and the second thread has a tooth height c2 that satisfies: <NUM> ≤ c2 ≤ <NUM>. With such dimensions, the locking effect of the first thread and the second thread and thus the safety of the cooking utensil when in a pressurized state can be ensured.

Further, the first thread has a tooth top width f1 that satisfies: <NUM> ≤ f1 ≤ <NUM>, and a tooth bottom width b1 that satisfies: <NUM> ≤ b1 ≤ <NUM>; and, the second thread has a tooth top width f2 that satisfies: <NUM> ≤ f2 ≤ <NUM>, and a tooth bottom width b2 that satisfies: <NUM> ≤ b2 ≤ <NUM>. With such dimensions, the connection strength of the locking structure is ensured so that the cooking utensil can meet pressure bearing requirements during the course of pressurized cooking while at the same time material waste and space occupation caused by a bigger overall size of the cooker assembly is avoided.

Further, the pot comprises a pot body and a pot handle provided on the pot body, and the lid comprises a lid handle. The first thread is provided on an outer side wall of the pot body, and the first connecting line L1 between the first end of the first thread and the center of the pot forms a second angle e with a center line L3 of the pot handle, the second angle e satisfying: <NUM>° ≤ e ≤ <NUM>°. During utilization, a user first aligns the lid handle with the pot handle and needs only rotate the lid by the angle e to align the starting end of the second thread with the starting end of the first thread, arriving at the starting position of screwing. The provision of the second angle e enables the user to rapidly achieve the alignment between the first thread and the second thread, facilitating utilization by the user and improving the user's utilization experience.

Further, the pot is made of metal, the first thread is formed by rolling on the pot, and the pot has a thickness h that satisfies: <NUM> ≤ h ≤ <NUM>. By using the roll forming process for the first thread, material can be saved for the pot. In addition, the strength of the thread is high and thus able to ensure the connection strength of the locking structure so that the connection between the pot and the lid can meet pressure bearing requirements during the course of pressurized cooking.

Further, the first thread and the second thread are in clearance fit, and the fit clearance a between the first thread and the second thread satisfies: <NUM> ≤ a ≤ <NUM>. This appropriate provision of the fit clearance a not only meets the pressure bearing requirements of the cooking utensil but also prevents an increase of processing costs due to the pursuit of fitting precision.

Further, the first thread and the second thread are continuous thread structures, or the first thread and the second thread comprise a plurality of thread segments. With the provision of continuous thread structures, the connection strength between the first thread and the second thread can be effectively ensured so that the pressure cooker can meet pressure bearing requirements during the course of utilization. Provided that the connection strength is ensured, the first thread and the second thread can comprise a plurality of thread segments. The provision of the plurality of thread segments allows a user to achieve the locking connection between the lid and the pot by twisting a very small angle.

Further, the pot comprises a pot body and a temperature sensing probe penetrating a side wall of the pot body, a temperature sensing end of the temperature sensing probe extending into the pot body. The provision of the temperature sensing probe enables real-time monitoring of changes of the temperature inside the pot.

Further, the cooking utensil further comprises a cooker assembly, a connecting device, and a controller, the controller being provided inside the cooker assembly, the connecting device connecting the controller and the temperature sensing probe. The provision of the connecting device and the controller enables the receipt and processing of temperature signals transmitted by the temperature sensing probe. Based on temperature signals transmitted in real time, the controller adjusts the heating temperature and/or cooking program to effectuate a better control of the cooking process, improving cooking results.

Further, the pot further comprises a pot handle provided on the pot body, a part of the temperature sensing probe is provided inside the pot handle, and the connecting device comprises a first wireless module and a second wireless module that are communicatively connected, the first wireless module being provided inside the pot handle and connected with the temperature sensing probe, and the second wireless module being provided in the cooker assembly and connected with the controller. With the provision of the connecting device, complicated cabling is not required in order to transmit temperature signals in real time to the controller. Based on temperature signals received, the controller adjusts correspondingly the heating temperature and/or cooking program to effectuate a better control of the cooking process, improving cooking effects.

Further, the cooker assembly comprises a cooker body and a heating device provided at a bottom of the cooker body, the cooker body comprising an outer shell, an inner shell, and a ring portion connected to a top of the outer shell and the inner shell, the second wireless module being provided between the outer shell and the inner shell. The provision of the heating device inside the cooker body enables the heating of the pot.

Further, a groove is provided in the inner shell, and the cooker body further comprises a plate having a position-limiting portion provided in the groove, the second wireless module being provided between the position-limiting portion and the ring portion. Due to the fact that the groove and the plate are located below the first wireless module and the gap between the first wireless module and the second wireless module is provided to be within an appropriate distance, the second wireless module is within the range required for signal transmission, thus ensuring the receipt of signals transmitted by the first wireless module by the second wireless module.

Further, the pot comprises a pot body and a pressure relief port provided at a pot mouth of the pot body. This pressure relief port is a weak position on the pot body. When the pressure inside the pot reaches a certain level, the space inside the pot is in communication with the atmosphere via the pressure relief port, achieving pressure relief.

Further, the cooking utensil further comprises a sealing ring and a fixed pressing ring, a connecting part of the sealing ring being located between the lid and the fixed pressing ring, and the sealing ring being fixed to an inner surface of the lid through the fixed pressing ring. The provision of the sealing ring and the fixed pressing ring enables an excellent result of sealing the cooking space between the pot and the lid after the lid is in position after screwing, facilitating pressurization inside the pot.

The drawings accompanying the present application, which constitute part of the present application, are used for further understanding the present invention. Illustrative embodiments of the present invention and their description are used for explaining the present invention, without constituting any unduly limitation of the present invention. In the accompanying drawings:.

The above-described accompanying drawings contain the following reference numerals:
<NUM>: pot; <NUM>: pot body; <NUM>: pressure relief port; <NUM>: pot handle; <NUM>: temperature sensing probe; <NUM>: lid; <NUM>: lid handle; <NUM>: locking structure; <NUM>: first thread; <NUM>: second thread; <NUM>: cooker assembly; <NUM>: cooker body; <NUM>: outer shell; <NUM>: inner shell; <NUM>: groove; <NUM>: ring portion; <NUM>: heating device; <NUM>: plate; <NUM>: position-limiting portion; <NUM>: connecting device; <NUM>: first wireless module; <NUM>: second wireless module; <NUM>: sealing ring; <NUM>: fixed pressing ring; a: fit clearance; c1: tooth height of the first thread; c2: tooth height of the second thread; f1: tooth top width of the first thread; b1: tooth bottom width of the first thread; f2: tooth top width of the second thread; b2: tooth bottom width of the second thread; d1: thread angle of the first thread; d2: thread angle of the second thread.

The technical solutions of embodiments of the present invention will be described below clearly and completely in conjunction with the accompanying drawings of embodiments of the present invention. Of course, the described embodiments are only some, rather than all, of the embodiments of the present invention. The following description of at least one exemplary embodiment is in fact only illustrative, and in no way constitutes any limitation on the present invention or its application or use.

It should be noted that the terms used herein are only to describe specific modes of realization, and are not intended to limit the exemplary modes of realization of the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include plural forms. In addition, it should also be understood that when the terms "comprise" and/or "include" are used in the present description, they indicate the existence of a feature, step, operation, device, component, and/or a combination thereof.

Unless claimed in the independent claim, the relative arrangement of components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of various parts shown in the accompanying drawings are not drawn in accordance with actual proportional relationships. Technologies, methods, and equipments known to those of ordinary skill in the relevant fields may not be discussed in detail, but where appropriate, the technologies, methods, and equipments should be regarded as part of the present disclosure. It should be noted that similar reference numerals and letters denote similar items in the following accompanying drawings. Therefore, once an item is defined in one accompanying drawing, it does not need to be further discussed in subsequent accompanying drawings.

As shown in <FIG>, <FIG>, <FIG>, <FIG>, the cooking utensil of the present embodiment comprises: a pot <NUM>, a lid <NUM>, and a locking structure <NUM>. The lid <NUM> covers the pot <NUM>. The locking structure <NUM> is provided between the lid <NUM> and the pot <NUM>. The locking structure <NUM> comprises a first thread <NUM> provided on the pot <NUM> and a second thread <NUM> provided on the lid <NUM>. The second thread <NUM> cooperates with the first thread <NUM>. In this embodiment, a first connecting line L1 between a first end of the first thread <NUM> and a center of the pot <NUM> forms a first angle n with a second connecting line L2 between a second end of the first thread <NUM> and the center of the pot <NUM>, the first angle n satisfying: <NUM>° ≤ n ≤ <NUM>° ; the first thread <NUM> and the second thread <NUM> are trapezoidal threads, the first thread <NUM> has a thread angle d1 that satisfies: <NUM>° ≤ d1 ≤ <NUM>° , and the second thread <NUM> has a thread angle d2 that satisfies: <NUM>° ≤ d2 ≤ <NUM>°.

With the technical solution of this embodiment, a first thread <NUM> is provided on the pot <NUM> and a second thread <NUM> is provided on the lid <NUM>. The locking of the pot <NUM> and the lid <NUM> is achieved by the cooperation between the first thread <NUM> and the second thread <NUM>. A first connecting line L1 between a first end of the first thread <NUM> and a center of the pot <NUM> forms a first angle n with a second connecting line L2 between a second end of the first thread <NUM> and the center of the pot <NUM>, the first angle n satisfying: <NUM>° ≤ n ≤ <NUM>° (in other words, the first thread <NUM> has a length between half a turn and one turn of a circumference of the pot <NUM>); the first thread <NUM> and the second thread <NUM> are trapezoidal threads, the first thread <NUM> has a thread angle d1 that satisfies: <NUM>° ≤ d1 ≤ <NUM>° , and the second thread <NUM> has a thread angle d2 that satisfies: <NUM>° ≤ d2 ≤ <NUM>°. Thanks to the above-described first angle n, the angle of screwing of a user during operation is relatively small and it suffices to screw at most one full turn, facilitating operations of the user to open or close the lid. Moreover, by providing trapezoidal threads and selecting the above-described thread angle values, the locking effect of the first thread <NUM> and the second thread <NUM> can be ensured and safety of the cooking utensil in a pressurized state can be ensured. Therefore, the technical solution of this embodiment can well take into account the convenience of user operation and the pressurization safety at the same time. The processing of threads has the advantages of being simple, having a low cost, and achieving a good locking effect. In addition, in comparison to the process of flanging in the relevant art, the processing of threads does not need to cut a large amount of materials to form notches spaced part so as to achieve the cooperation between the pot <NUM> and the lid <NUM>, thus is simple and leads to a relatively high connection strength. Therefore, the technical solution of this embodiment effectively solves the problem in the relevant art that the process of flanging is complicated.

As shown in <FIG>, the first connecting line L1 between a first end of the first thread <NUM> and a center of the pot <NUM> refers to a connecting line in a certain horizontal plane between the first end of the first thread <NUM> and the center of the pot <NUM>. Correspondingly, the second connecting line L2 between a second end of the first thread <NUM> and the center of the pot <NUM> refers to a connecting line in a certain horizontal plane between the second end of the first thread <NUM> and the center of the pot <NUM>.

If n is smaller than <NUM>°, it will affect pressurization safety. When n is greater than <NUM>°, it will cause a user to expend a lot of efforts when twisting the lid over an excessive angle and even be unable to complete the operation in one pass, needing potentially to twist it twice.

The first thread <NUM> and the second thread <NUM> are trapezoidal threads because the strength of trapezoidal threads is relatively good and they are easy to process and demold and have a relatively good pressure bearing capability. The first thread <NUM> has a thread angle d1 that satisfies: <NUM>° ≤ d1 ^<NUM>° , and the second thread <NUM> has a thread angle d2 that satisfies: <NUM>° ≤d2 ≤ <NUM> °. The above-described thread angle d1 and the first angle n are associated with each other and together decide the strength of the first thread <NUM> and thus the pressure bearing capability of the first thread <NUM>.

As shown in <FIG>, in this embodiment, the thread angle d1 of the first thread <NUM> is equal to the thread angle d2 of the second thread <NUM>, i.e., d1 = d2 = <NUM>°. This value is able to ensure that the first thread <NUM> and the second thread <NUM> cooperate tightly with each other and thus ensure the connection strength of the locking structure <NUM>. When d1 and d2 are smaller than <NUM>°, processing is relatively difficult and it would be relatively difficult for a user to screw the pot <NUM> and the lid <NUM> together, causing inconvenience to the user; when d1 and d2 are greater than <NUM>°, the connection strength of the locking structure <NUM> is unable to meet pressure bearing requirements on the cooking utensil during the course of pressurized cooking.

The length of the second thread <NUM> matches the length of the first thread <NUM>. In other words, the length of the second thread <NUM> is between half a turn and one turn of the circumference of the lid <NUM>. Of course, the length of the second thread <NUM> can be such that it is longer than that of the first thread <NUM> and exceeds one turn of the circumference of the lid <NUM>.

Preferably, the first angle n satisfies: <NUM>° ≤ n ≤ <NUM>° This value is able to further improve user operation convenience and pressurization safety. As preferred modes of realization, the first angle n can be <NUM>° , <NUM>° , <NUM>° , <NUM>° , <NUM>° , or <NUM>°.

The first thread <NUM> has a tooth height c1 that satisfies: <NUM> ≤ c1 ≤ <NUM>, and the second thread <NUM> has a tooth height c2 that satisfies: <NUM>≤ c2 ≤ <NUM>. These sizes make it possible to ensure the locking effect of the first thread <NUM> and the second thread <NUM> and the safety of the cooking utensil when in a pressurized state. In addition, with these sizes, the processing costs can also be taken into account while rendering the dimension of the cooking utensil reasonable. Preferably, c1 = c2 = <NUM>.

In this embodiment, the connection between the lid <NUM> and the pot <NUM> is achieved by means of thread screwing, leading to the realization of a pressure bearing function. Thread connection has advantages of being easy and cheap. Moreover, by using thread screwing, the appearance of the pot <NUM> and the lid <NUM> is rendered more esthetic.

The first thread <NUM> has a tooth top width f1 that satisfies: <NUM> ≤ f1 ≤ <NUM>, and a tooth bottom width b1 that satisfies: <NUM> ≤ b1 ≤ <NUM>; and, the second thread <NUM> has a tooth top width f2 that satisfies: <NUM> ≤ f1 ≤ <NUM>, and a tooth bottom width b2 that satisfies: <NUM> ≤ b2 ≤ <NUM>. These sizes ensure the connections strength of the locking structure <NUM> so that the cooking utensil is able to meet pressure bearing requirements during the course of pressurized cooking while avoiding material waste and excessive space occupation caused by a bigger overall size of a cooker assembly.

In this embodiment, as shown in <FIG>, the tooth top width f1 of the first thread <NUM> is equal to the tooth top width f2 of the second thread <NUM>, i.e., f1 = f2 = <NUM>. The tooth bottom width b1 of the first thread <NUM> is equal to the tooth bottom width b2 of the second thread <NUM>, i.e., b1 = b2 = <NUM>. Thus, it can be ensured that the first thread <NUM> and the second thread <NUM> cooperate tightly, ensuring the connection strength of the locking structure <NUM>. It should be noted that, when f1 and f2 are smaller than <NUM> or b1 and b2 are smaller than <NUM>, the connection strength of the locking structure <NUM> cannot meet the pressure bearing requirements of the cooking utensil during the course of pressurized cooking. Moreover, when f1 and f2 are greater than <NUM> or b1 and b2 are greater than <NUM>, though the increase in size can further increase the connection strength of the locking structure <NUM>, it will further increase the overall size of the cooking utensil, which, on one hand, will cause material waste, and on the other hand, will make the cooking utensil occupy an excessive space. The dimensions described above ensure the connection strength of the locking structure <NUM> and enable the cooking utensil to meet the pressure bearing requirements during the course of pressurized cooking, while avoiding material waste and space occupation caused by a bigger overall size of the cooker assembly <NUM>.

In the present application, the first thread can be an external thread, and correspondingly, the second thread is an internal thread; or, the first thread is an internal thread, and correspondingly, the second thread is an external thread. These two ways of providing the threads are both able to achieve the locking between the lid and the pot. The first thread and the second thread can be right-hand threads. They can also be left-hand threads.

In order to reduce the difficulty of processing threads while ensuring the locking effect of the locking structure <NUM>, in this embodiment, the first thread <NUM> is an external thread, and the second thread <NUM> is an internal thread. Moreover, taking into consideration the utilization habits of a user when twisting the lid <NUM> to lock the lid <NUM> with the pot <NUM>, in this embodiment, the first thread <NUM> and the second thread <NUM> are right-hand threads. The pot <NUM> comprises a pot body <NUM> and a pot handle <NUM> provided on the pot body <NUM>, and the lid <NUM> comprises a lid handle <NUM>. The first thread <NUM> is an external thread provided on an outer side wall of the pot body <NUM>. The first connecting line L1 between the first end of the first thread <NUM> and the center of the pot <NUM> forms a second angle e with a center line of the pot handle <NUM>, the second angle e satisfying: <NUM>° ≤ e ≤ <NUM>°. The above-mentioned first end of the first thread <NUM> is the starting position of the first thread <NUM> on the pot <NUM>. As shown in <FIG> and <FIG>, in this embodiment, the second angle e is <NUM>°. As a preferred mode of realization, the sum of the first angle n and the second angel e can be made equal to <NUM>°.

In this embodiment, there are two pot handles <NUM> and two lid handles <NUM> are correspondingly provided. Two pot handles <NUM> and two lid handles <NUM> facilitate a user's operations.

During utilization, a user makes the first thread <NUM> screwed to the second thread <NUM> by holding the lid handles <NUM> to rotate the lid <NUM>, so as to achieve the locking between the lid <NUM> and the pot <NUM>. The user can first align the lid handles <NUM> with the pot handles <NUM> (the position of the lid handles <NUM> is as shown in <FIG>) and needs only twist the lid by the angle e to align the starting end of the second thread <NUM> on the lid <NUM> with the starting end of the first thread <NUM> on the pot <NUM>, arriving at the starting position of screwing. The user can achieve the locking between the lid <NUM> and the pot <NUM> by continuing to twist the lid <NUM> to rotate a full round so that the first thread <NUM> and the second thread <NUM> engage with each other entirely. The provision of the second angle e enables the user to rapidly achieve the alignment between the first thread <NUM> and the second thread <NUM>, facilitating the screwing of the second thread <NUM> on the lid <NUM> to the first thread <NUM> by the user. Thus, a user's alignment and screwing of the lid <NUM> during the course of utilization is facilitated and the user's utilization experience is improved.

As shown in <FIG>, in this embodiment, the pot <NUM> is made of metal, specifically, stainless steel. The first thread <NUM> is formed by rolling on the pot <NUM>, and the pot <NUM> has a thickness h that satisfies: <NUM> ≤ h ≤ <NUM>. Preferably, h = <NUM> or h = <NUM>. By using the roll forming process for the first thread <NUM>, the material of the pot <NUM> can be saved. In addition, the strength of the thread is high and thus able to ensure the connection strength of the locking structure <NUM> so that the connection between the pot <NUM> and the lid <NUM> is able to meet pressure bearing requirements during the course of pressurized cooking. It should be noted that: when the thickness h is smaller than <NUM>, the pressure bearing requirements of the pressure cooker during the course of utilization cannot be met; when the thickness h is greater than <NUM>, it will cause material waste and increase the weight of the entire cooking utensil.

In other modes of realization of the present application, another processing method, such as turning and grinding, can be used for the first thread and the second thread, so long as the threads produced by the processing are able to achieve the locking between the lid and the pot and meet the pressure bearing requirements of the cooking utensil during the course of pressurized cooking.

The first thread <NUM> and the second thread <NUM> are in clearance fit, and the fit clearance a between the first thread <NUM> and the second thread <NUM> satisfies: <NUM> ≤ a ≤ <NUM>. As shown in <FIG>, in this embodiment, a = <NUM>. With such a fit clearance a, the connection strength of the locking structure <NUM> can be satisfied. When the fit clearance a is smaller than <NUM>, the processing costs of the threads will increase.

Pressure bearing tests are performed on cooking utensils obtained in embodiments <NUM> to <NUM> and comparisons <NUM> to <NUM>. Their performance is shown in Table <NUM>.

The above-mentioned breaking pressure refers to the pressure under which there is no gas leak from the cooking utensil. Here, a certain extent of deformation is allowed for the pot and the lid.

It can be shown by comparing the data in Table <NUM> that technical solutions that use embodiments <NUM> to <NUM> of the present invention can increase the breaking pressure of the cooking utensil by using appropriate values of four parameters. Among them, embodiment <NUM> can achieve a good compromise between the breaking pressure and user operation convenience. When the first angle n takes a value smaller than <NUM>°, it can be seen from the values of comparison <NUM> that its breaking pressure is relatively low, offering insufficient safety. When the first angle n takes a value equal to or higher than <NUM>°, the breaking pressure can meet safety requirements.

It can be seen by comparing the data of embodiment <NUM>, embodiment <NUM>, and comparison <NUM> that when the thread angles d1 and d2 satisfy: <NUM>° ≤ d1 = d2 ≤ <NUM>°, the breaking pressure is relatively high, offering relatively high safety.

It can be seen by comparing the data of embodiment <NUM>, embodiment <NUM>, and comparison <NUM> that when the tooth heights c1 and c2 satisfy: <NUM> ≤ c1 = c2 ≤ <NUM>, the breaking pressure is relatively high, offering relatively high safety.

It can be seen by comparing the data of embodiment <NUM>, embodiment <NUM>, and comparison <NUM> that when the tooth top widths f1 and f2 satisfy: <NUM> ≤ f1 = f2 ≤ <NUM>, the breaking pressure is relatively high, offering relatively high safety.

It can also be seen from Table <NUM> that the cooking utensil obtained by using the technical solutions of the present invention has the advantages of offering pressurization safety and facilitating a user's operations. As shown in <FIG>, <FIG>, <FIG>, in this embodiment, the first thread <NUM> and the second thread <NUM> are continuous thread structures. By providing continuous threads, the connection strength of the first thread <NUM> and the second thread <NUM> can be effectively ensured so that the cooking utensil is able to meet the pressure bearing requirements during the course of utilization.

In other modes of realization of the present application, provided that the connection strength is ensured, the first thread and the second thread can comprise a plurality of thread segments. The first thread and the second thread are correspondingly processed into a plurality of segments. During the course of screwing the lid by a user, when the threads of the second thread are aligned with the intervals between the plurality of thread segments of the first thread, in order to achieve the locking connection between the lid and the pot, it suffices to twist by a very small angle so that the threads of the first thread and the second thread correspond to each other in position.

In order to improve food cooking effects, the temperature inside the pot <NUM> needs to be measured. As shown in <FIG>, <FIG>, <FIG>, and <FIG>, the pot <NUM> comprises a pot body <NUM> and a temperature sensing probe <NUM> penetrating a side wall of the pot body <NUM>, a temperature sensing end of the temperature sensing probe <NUM> extending into the pot body <NUM> to measure the temperature in the pot body <NUM>. By providing the temperature sensing probe <NUM> in a penetrating way on the pot body <NUM>, the temperature sending end of the temperature sensing probe <NUM> is able to extend into the interior of the pot <NUM> and monitor temperature changes in the pot in real time, achieving accurate measurement of the temperature in the pot.

As shown in <FIG>, <FIG>, <FIG>, and <FIG>, the cooking utensil further comprises a cooker assembly <NUM>, a connecting device <NUM>, and a controller (not illustrated in the drawings; it can be a control chip), the controller being provided inside the cooker assembly <NUM>, the connecting device <NUM> connecting the controller and the temperature sensing probe <NUM>. The temperature sensing probe <NUM> monitors temperature changes in the pot <NUM> in real time and transmits temperature signals to the controller via the connecting device <NUM>. Based on the temperature signals transmitted in real time, the controller correspondingly adjusts the heating temperature and/or cooking program to effectuate a better control of the cooking process, improving cooking effects.

As shown in <FIG> and <FIG>, the pot <NUM> further comprises a pot handle <NUM> provided on the pot body <NUM>, a part of the temperature sensing probe <NUM> is provided inside the pot handle <NUM>, and the temperature sensing probe <NUM> is sealed, facilitating washing and cleaning of the pot <NUM> by a user. The connecting device <NUM> comprises a first wireless module <NUM> and a second wireless module <NUM> that are communicatively connected, the first wireless module <NUM> being provided inside the pot handle <NUM> and connected with the temperature sensing probe <NUM>, and the second wireless module <NUM> being provided in the cooker assembly <NUM> and connected with the controller. In this embodiment, the above-mentioned temperature sensing probe <NUM> and the connecting device <NUM> together constitute a wireless temperature measuring module. With the connecting device <NUM> comprising the first wireless module <NUM> and the second wireless module <NUM> that are communicatively connected in a wireless way, no complicated cabling is needed to achieve real-time transmission of temperature signals. With the second wireless module <NUM> and the controller connected, based on temperature signals received, the controller adjusts correspondingly the heating temperature and/or cooking program to effectuate a better control of the cooking process, improving cooking effects.

A grooved plate is further provided inside the pot handle <NUM>. The first wireless module <NUM> is fixed in the pot handle <NUM> by means of the grooved plate. In order to facilitate washing the entire pot with water, an injection hole is provided at a bottom of the pot handle <NUM> through which hole resin is injected in to achieve waterproofing of the first wireless module <NUM>.

It should be noted that temperature monitoring and signal transmission can also be achieved by connecting the temperature sensing probe and the connecting device in a wired way. However, given that cabling will complicate the structure, in this embodiment, a wireless temperature measuring module is preferably used for real time monitoring of the temperature in the pot and for signal transmission. The mode in which the temperature sensing probe and the connecting device are connected in a wired way is also within the scope of protection of the present application.

As shown in <FIG>, and <FIG> to <FIG>, the cooker assembly <NUM> comprises a cooker body <NUM> and a heating device <NUM> provided at a bottom of the cooker body <NUM>, the cooker body <NUM> comprising an outer shell <NUM>, an inner shell <NUM>, and a ring portion <NUM> connected to a top of the outer shell <NUM> and the inner shell <NUM>, the second wireless module <NUM> being provided between the outer shell <NUM> and the inner shell <NUM>. By providing the heating device <NUM> inside the cooker body <NUM>, heating of the pot <NUM> can be achieved. By providing the second wireless module <NUM> between the outer shell <NUM> and the inner shell <NUM>, below the first wireless module <NUM>, receipt of the signals transmitted by the first wireless module <NUM> can be ensured and thus signals of the temperature in the pot are transmitted in real time to the controller, which adjusts correspondingly the heating temperature and/or cooking program to effectuate a better control of the cooking process. In this embodiment, the outer shell <NUM>, the inner shell <NUM>, and the ring portion <NUM> form an integral structure that can be obtained by injection molding.

As shown in <FIG> and <FIG> to <FIG>, a groove <NUM> is provided in the inner shell <NUM>, and the cooker body <NUM> further comprises a plate <NUM> provided in the groove <NUM>, the plate <NUM> having a position-limiting portion <NUM>, the second wireless module <NUM> being provided between the position-limiting portion <NUM> and the ring portion <NUM>. The plate <NUM> has a curvature and is provided concentrically with the inner shell <NUM>. The plate <NUM> is positioned in the cooker assembly <NUM> by means of the groove <NUM> and the upper surface of the heating device <NUM>, and thus, the position limiting of the second wireless module <NUM> is achieved by means of the position-limiting portion <NUM> of the plate <NUM>, so that the second wireless module <NUM> is located below the first wireless module <NUM> and that the vertical distance between the first wireless module <NUM> and the second wireless module <NUM> is within the range required for signal transmission (the vertical distance between the first wireless module <NUM> and the second wireless module <NUM> is within the range of <NUM> to <NUM>, and preferably <NUM>), ensuring stability of signal transmission and thus ensuring the receipt of signals transmitted by the first wireless module <NUM> by the second wireless module <NUM>. The above-described structure is able to achieve the fixing of the plate <NUM> and the second wireless module <NUM> without any screw or snap-fit parts and in a way that is safe, reliable, convenient to mount, and low in cost.

As shown in <FIG>, <FIG>, and <FIG>, the lid <NUM> further comprises a sealing ring <NUM> and a fixed pressing ring <NUM>, a connecting part of the sealing ring <NUM> being located between the lid <NUM> and the fixed pressing ring <NUM>, and the sealing ring <NUM> being fixed to an inner surface of the lid <NUM> through the fixed pressing ring <NUM>. An upper part of the sealing ring <NUM> envelopes the fixed pressing ring <NUM> so that the connecting part of the sealing ring <NUM> is located between the lid <NUM> and the fixed pressing ring <NUM> and the fixed pressing ring <NUM> fixes the sealing ring <NUM> to an inner surface of the lid <NUM>. After the lid <NUM> is in position after screwing, the sealing ring <NUM> is pressed against an inner surface of the pot <NUM>, facilitating pressurization in the pot.

As shown in <FIG>, <FIG>, and <FIG>, the pot <NUM> comprises a pot body <NUM> and a pressure relief port <NUM> provided at a pot mouth of the pot body <NUM>. This pressure relief port <NUM> is a weak part on the pot body <NUM>. When the pressure inside the pot reaches a certain level or when the pressure inside the pot is abnormal, the sealing ring <NUM> will be squeezed out of the pressure relief port <NUM> by the pressure in the pot, so that the space inside the pot is in communication with the atmosphere and the pressure is safely released. Preferably, the pressure relief port <NUM> is provided at a position above the pot handle <NUM>. During the course of pressure relief, the pot handle <NUM> can block some of the hot vapor, improving the pressure cooker's safety.

In this embodiment, the cooking utensil includes air fryers, rice cookers, electric pressure cookers, or multi-function heating cookers that have functions of baking, rice cooking, and dish cooking.

In the description of the present invention, it should be understood that orientation terms such as "front," "back," "upper," "lower," "left," "right," "transversal," "perpendicular," "vertical," "horizontal," "top," and "bottom" indicate an orientation or positional relationship generally based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, these orientation terms do not indicate or imply the intended device or element must have a specific orientation or be constructed or operated in a specific orientation and therefore cannot be understood as a limitation of the scope of protection of the present invention. The orientation terms "inner" and "outer" refer to the inside and outside relative to the contour of a component itself.

For ease of description, spatial relationship terms can be used herein, such as "on top of," "above," "on the upper surface of. ," and "the above," to describe the spatial position relationship of an object or feature and another object or feature as shown in the accompanying drawings. It should be understood that the spatial relationship terms are intended to encompass different orientations during use or operation in addition to the orientations of an object described in the drawings. For example, if an object in an accompanying drawing is inverted, then the object, described as "on top of another object or structure" or "above another object or structure" will then be positioned as "under another object or structure" or "below another object or structure. " Therefore, the exemplary term "above. "can include both orientations "above. " and "below. " The object can also be positioned in a different way (rotated by <NUM> degrees or in other orientations), and the spatial relationship description used herein can be interpreted correspondingly.

In addition, it should be noted that the use of terms such as "first" and "second" to define parts is only for the convenience of distinguishing the corresponding parts. Unless otherwise specified, the above terms have no special meaning and therefore cannot be understood as a limitation of the scope of protection of the present invention.

Claim 1:
A cooking utensil comprising:
a pot (<NUM>);
a lid (<NUM>) covering the pot (<NUM>); and
a locking structure (<NUM>) arranged between the lid (<NUM>) and the pot (<NUM>), wherein the locking structure (<NUM>) comprises a first thread (<NUM>) provided on the pot and a second thread (<NUM>) provided on the lid (<NUM>), the second thread (<NUM>) cooperating with the first thread (<NUM>) and the first thread (<NUM>) and the second thread (<NUM>) being trapezoidal threads, the cooking utensil being characterized in that a first connecting line L1 between a first end of the first thread (<NUM>) and a center of the pot (<NUM>) forms a first angle n with a second connecting line L2 between a second end of the first thread (<NUM>) and the center of the pot (<NUM>), the first angle n satisfying: <NUM>° ≤n≤<NUM>° , so that the first thread (<NUM>) has a length between half a turn and one turn of a circumference of the pot (<NUM>);
and in that the first thread (<NUM>) has a thread angle d1 which satisfies: <NUM>° ≤ d1 ≤ <NUM>° , and the second thread ( <NUM>) has a thread angle d2 which satisfies: <NUM>° ≤d2≤<NUM>° .