Vacuum detection method, device and cooking utensil

Abstract

The present invention discloses a vacuum detection method, device and cooking utensil. The vacuum detection method comprises: after the vacuum device starts to work, obtaining the first sampling value, the second sampling value and the first vacuum degree collected by the sampling circuit, wherein the first vacuum degree is the vacuum degree corresponding to the first sampling value obtained; obtaining the first time interval and the first working time corresponding to the second sampling value, wherein the first time interval is used to characterize the time interval from collecting the first sampling value to collecting the second sampling value, and the first working time is used to characterize the working time of the vacuum device when the second sampling value is collected; according to the first sampling value, the second sampling value, the first time interval, the first working time and the first vacuum degree, the second vacuum degree of the cooking utensil is obtained. The present invention solves the technical problems of low detection accuracy and high cost of vacuum detection schemes in the prior art.

Description

Technical Field

[0001] The present invention relates to the field of household appliances, and in particular to a vacuum detection method, device and cooking utensil. Background Art

[0002] Existing cooking utensils are equipped with vacuum devices, such as vacuum pumps, which can vacuum the inside of the cooking utensils. The effect of cooking and preserving food in a vacuum state is better than that in a non-vacuum state. In order to achieve vacuum cooking, the vacuum degree of the cooking utensils needs to be tested.

[0003] Currently, the commonly used vacuum degree detection is mainly judged by the vacuuming time. The working time is set in the program, and the timing begins when the vacuuming device is started. The vacuuming is stopped after the set time is reached. However, due to the different volumes of the vacuuming devices, the time to reach the set vacuum degree is different. The method of detecting the vacuum degree by time has low accuracy.

[0004] Currently, no effective solution has been proposed to address the problems of low detection accuracy and high cost of vacuum detection solutions in the prior art. Summary of the invention

[0005] The embodiments of the present invention provide a vacuum detection method, device and cooking utensil to at least solve the technical problems of low detection accuracy and high cost of vacuum detection solutions in the prior art.

[0006] According to one aspect of an embodiment of the present invention, a vacuum detection method is provided, comprising: after a vacuum pumping device starts working, obtaining a first sampling value, a second sampling value and a first vacuum degree collected by a sampling circuit, wherein the first vacuum degree is the vacuum degree corresponding to the first sampling value obtained; obtaining a first time interval and a first working time corresponding to the second sampling value, wherein the first time interval is used to characterize the time interval from collecting the first sampling value to collecting the second sampling value, and the first working time is used to characterize the working time of the vacuum pumping device when the second sampling value is collected; and obtaining the second vacuum degree of the cooking appliance according to the first sampling value, the second sampling value, the first time interval, the first working time and the first vacuum degree.

[0007] In an embodiment of the present invention, a sampling circuit is connected in series to a power supply circuit of a vacuum pumping device, sampling values ​​are collected by the sampling circuit, and the current vacuum degree of the cooking appliance is obtained based on the first sampling value, the second sampling value, the first time interval and the first working time corresponding to the second sampling value, and the first vacuum degree. Compared with the prior art, there is no need to control the vacuum pumping device by setting the working time, thereby achieving the technical effect of improving the accuracy of vacuum degree detection, reducing the cost of the cooking appliance, and improving the cooking effect, thereby solving the technical problems of low detection accuracy and high cost of the vacuum detection scheme in the prior art.

[0008] Furthermore, in the case where the first sampling value is the first sampling value obtained, obtaining the first time interval and the first working time corresponding to the first sampling value includes: obtaining the time interval of any two adjacent sampling values ​​from the first sampling value and the second sampling value to obtain at least one second time interval and the second working time corresponding to the first sampling value; calculating the sum of at least one second time interval to obtain the first time interval; calculating the sum of the second working time and the first time interval to obtain the first working time. After each second sampling value is obtained from the sampling circuit, the current vacuum degree can be obtained according to the time interval between the second sampling value and the first sampling value collected by the sampling circuit and the current working time. Since the longer the time interval between the first sampling value and the first sampling value, the higher the accuracy of vacuum degree detection, the accuracy of vacuum degree detection is further improved, the cost of cooking appliances is reduced, and the cooking effect is improved.

[0009] Furthermore, when the first sampling value is a sampling value adjacent to the second sampling value, obtaining the first working time corresponding to the first sampling value includes: obtaining the third working time corresponding to the first sampling value; calculating the sum of the third working time and the first time interval to obtain the first working time. After each second sampling value is obtained from the sampling circuit, the current vacuum degree can be obtained according to the time interval between the second sampling value and the adjacent first sampling value and the current working time, thereby achieving the effect of improving the accuracy of vacuum degree detection, reducing the cost of cooking appliances, and improving cooking effects.

[0010] Further, according to the first sampling value, the second sampling value, the first time interval, the first working time and the first vacuum degree, obtaining the second vacuum degree of the cooking appliance includes: calculating the difference between the second sampling value and the first sampling value to obtain the first difference; calculating the ratio of the first difference to the first time interval to obtain the first vacuum flow; calculating the product of the first vacuum flow and the first working time to obtain the first vacuum degree change; calculating the sum of the first vacuum degree change and the first vacuum degree to obtain the second vacuum degree. The flow of the vacuum pumping device is obtained by the first sampling value, the second sampling value and the first time interval, and then the current vacuum degree is obtained by calculating the product of the flow and the working time, and the sum with the first vacuum degree, so as to achieve the purpose of detecting vacuum, thereby improving the accuracy of vacuum degree detection, reducing the cost of the cooking appliance, and improving the cooking effect.

[0011] Furthermore, in the case where there are multiple first sampling values, there are multiple first time intervals, and there are multiple first working times, wherein obtaining the first time interval and the first working time corresponding to the second sampling value includes: obtaining the time interval between any two adjacent sampling values ​​from all first sampling values ​​and second sampling values ​​collected after each first sampling value, obtaining at least one third time interval, and the fourth working time corresponding to each first sampling value; calculating the sum of at least one third time interval to obtain each first time interval; calculating the sum of the fourth working time and the first time interval to obtain the first working time. After each second sampling value is obtained from the sampling circuit, the current vacuum degree can be obtained according to the time interval between the second sampling value and the multiple first sampling values ​​and the current working time, thereby achieving the effect of improving the accuracy of vacuum degree detection, reducing the cost of cooking appliances, and improving cooking effects.

[0012] Further, according to the first sampling value, the second sampling value, the first time interval, the first working time and the first vacuum degree, obtaining the second vacuum degree of the cooking appliance includes: calculating the difference between the second sampling value and each first sampling value to obtain multiple second differences; calculating the ratio of each second difference to the corresponding first time interval to obtain multiple second vacuum flows; calculating the product of each second vacuum flow and the first working time to obtain multiple products; calculating the sum of each product and the first vacuum degree to obtain multiple sums; calculating the average of the multiple sums to obtain the second vacuum degree. Multiple vacuum degrees are obtained through the second sampling value and each first sampling value, and the current vacuum degree is obtained by further calculating the average of the multiple vacuum degrees, so as to achieve the purpose of detecting the vacuum degree, thereby improving the accuracy of vacuum degree detection, reducing the cost of the cooking appliance, and improving the cooking effect.

[0013] Furthermore, after obtaining the second vacuum degree of the cooking appliance according to the first sampling value, the second sampling value, the first time interval, the first working time and the first vacuum degree, the vacuum detection method further includes: comparing the second vacuum degree with the preset vacuum degree; if the vacuum degree of the cooking appliance does not reach the preset vacuum degree, returning to the step of acquiring the first sampling value and the second sampling value collected by the sampling circuit until the vacuum degree of the cooking appliance reaches the preset vacuum degree; if the vacuum degree of the cooking appliance reaches the preset vacuum degree, controlling the vacuum device to stop working and storing the second sampling value. By comparing the calculated vacuum degree with the preset vacuum degree, it is determined whether to control the vacuum device to stop working, so as to control the working state of the vacuum device, complete the entire vacuum cooking process, and store the sampling value corresponding to the preset vacuum degree, so as to facilitate restarting the vacuum detection device for detection.

[0014] Furthermore, after the vacuum device is controlled to stop working, the vacuum detection method further includes: after a delay of a first preset time, controlling the vacuum device to restart working; obtaining a third sampling value collected by the sampling circuit; obtaining a fifth working time according to the third sampling value, the second sampling value and the preset vacuum flow rate, wherein the preset vacuum flow rate is a vacuum flow rate calculated when the first sampling value is the first sampling value obtained and the second sampling value is the second sampling value obtained; controlling the vacuum device to work according to the fifth working time. After the vacuum device stops working, the cooking appliance is controlled to maintain a vacuum state for a period of time, and the vacuum device is restarted, and the working time of the vacuum device to work again is obtained according to the second sampling value collected after the vacuum device is restarted, the first sampling value corresponding to the stored preset vacuum degree, and the preset vacuum flow rate obtained according to the first sampling value and the second sampling value, and the vacuum device is controlled to work according to the working time, thereby achieving the purpose of vacuum cooking of the cooking appliance.

[0015] Further, obtaining the fifth working time according to the third sampling value, the second sampling value and the preset vacuum flow rate includes: calculating the difference between the second sampling value and the third sampling value to obtain the third difference; calculating the product of the third difference and the preset vacuum flow rate to obtain the fifth working time. The working time of the vacuum device working again is obtained by multiplying the difference between the second sampling value collected after the vacuum device is restarted and the first sampling value corresponding to the preset vacuum degree stored, and the preset vacuum flow rate obtained according to the first sampling value and the second sampling value, thereby achieving the purpose of vacuum cooking of the cooking appliance.

[0016] Furthermore, obtaining the first sampling value includes: starting timing when the vacuum device starts working; when the timing reaches a second preset time, obtaining the sampling value collected by the sampling circuit to obtain the first sampling value. In order to obtain an accurate vacuum degree, the sampling value collected by the sampling circuit can be obtained as the first sampling value after the vacuum device starts working for a period of time, thereby further improving the accuracy of vacuum degree detection, reducing the cost of cooking appliances, and improving cooking effects.

[0017] Further, obtaining the first vacuum degree includes one of the following: obtaining a first preset value, and using the first preset value as the first vacuum degree; obtaining the second working time corresponding to the first sampling value, and obtaining the first vacuum degree according to the first sampling value and the second working time; obtaining the time range to which the second working time belongs, and using the vacuum degree corresponding to the time range as the first vacuum degree; obtaining the second preset value, and calculating the product of the second working time and the second preset value to obtain the first vacuum degree. The first vacuum degree is obtained by setting a default value or calculating, so as to achieve the accuracy requirements for vacuum degree calculation in different scenarios, further achieving the effect of improving the accuracy of vacuum degree detection, reducing the cost of cooking appliances, and improving cooking effects.

[0018] According to another aspect of an embodiment of the present invention, a vacuum detection system is also provided, including: a vacuum pumping device, a first end of the vacuum pumping device is connected to a DC power supply; a sampling circuit, a first end of the sampling circuit is connected to a second end of the vacuum pumping device, and the second end of the sampling circuit is grounded, and is used to collect multiple sampling values ​​during the operation of the vacuum pumping device; a controller, a sampling end of the controller is connected to the first end of the sampling circuit, and is used to obtain a first sampling value, a second sampling value and a first vacuum degree, as well as a first time interval and a first working time corresponding to the second sampling value, and obtain the second vacuum degree of the cooking appliance according to the first sampling value, the second sampling value, the first time interval, the first working time and the first vacuum degree, wherein the first vacuum degree is the vacuum degree corresponding to the first sampling value obtained, the first time interval is used to characterize the time interval from collecting the first sampling value to collecting the first sampling value, and the first working time is used to characterize the working time of the vacuum pumping device when the first sampling value is collected.

[0019] Furthermore, the vacuum extraction device is a vacuum pump.

[0020] According to another aspect of the embodiments of the present invention, there is provided a cooking appliance, comprising: the vacuum detection system in the above embodiment.

[0021] Furthermore, the cooking appliance is an electric pressure cooker.

[0022] According to another aspect of an embodiment of the present invention, a storage medium is further provided. The storage medium includes a stored program, wherein when the program is running, the device where the storage medium is located is controlled to execute the vacuum detection method in the above embodiment.

[0023] According to another aspect of an embodiment of the present invention, a processor is further provided, and the processor is used to run a program, wherein the vacuum detection method in the above embodiment is executed when the program is run. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. 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:

[0025] Figure 1 is a flow chart of a vacuum detection method according to an embodiment of the present invention;

[0026] Figure 2 is a flow chart of an optional first start-up operation of a vacuum pumping device according to an embodiment of the present invention;

[0027] Figure 3 is a flow chart of an optional restarting operation of a vacuum pumping device according to an embodiment of the present invention;

[0028] Figure 4 is a schematic diagram of a vacuum detection system according to an embodiment of the present invention; and

[0029] Figure 5 is a schematic diagram of an optional vacuum detection system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only embodiments of a part of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0031] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0032] Example 1

[0033] According to an embodiment of the present invention, an embodiment of a vacuum detection method is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0034] Figure 1 is a flow chart of a vacuum detection method according to an embodiment of the present invention. Figure 1 As shown, the method comprises the following steps:

[0035] Step S102, after the vacuum pumping device starts working, a first sampling value, a second sampling value and a first vacuum degree collected by the sampling circuit are obtained, wherein the first vacuum degree is the vacuum degree corresponding to the first sampling value obtained.

[0036] Optionally, the vacuum extraction device is a vacuum pump.

[0037] Specifically, the above-mentioned sampling circuit can be connected in series to the power supply circuit of the vacuum pump, and may include: a collection resistor, the resistance value of the collection resistor may be 1.5Ω, the AD port (analog-to-digital conversion, which is the abbreviation of Analog-to-Digital) of the single-chip microcomputer inside the cooking appliance is connected to the sampling circuit, the single-chip microcomputer can detect the voltage value of the sampling resistor through the AD port, and obtain the sampling value through AD conversion; the above-mentioned first vacuum degree may be the initial vacuum degree when the cooking appliance is in a non-vacuum state, may be a default value, or may be calculated through the first sampling value, and the first vacuum degree may be 0 or may not be 0.

[0038] Step S104, obtaining a first time interval and a first working time corresponding to the second sampling value, wherein the first time interval is used to characterize the time interval from collecting the first sampling value to collecting the second sampling value, and the first working time is used to characterize the working time of the vacuum device when the second sampling value is collected.

[0039] Step S106, obtaining a second vacuum degree of the cooking appliance according to the first sampling value, the second sampling value, the first time interval, the first working time and the first vacuum degree.

[0040] Optionally, the cooking appliance may be an electric pressure cooker.

[0041] Specifically, the above cooking appliance may be an electric pressure cooker, an electric rice cooker, a food processor, etc. In the embodiment of the present invention, an electric pressure cooker is taken as an example for description.

[0042] In an optional scheme, a sampling circuit can be connected in series to the power supply circuit of the vacuum pump. During the vacuum pump's vacuum extraction process, the single-chip microcomputer can collect the current sampling value (i.e., the second sampling value mentioned above) in real time, and based on the current sampling value, the historical sampling value (i.e., the first sampling value mentioned above), the time interval between the current sampling value and the historical sampling value (i.e., the first time interval mentioned above), the working time of the vacuum pump when the current sampling value is collected (i.e., the first working time mentioned above) and the first vacuum degree, the current vacuum degree of the cooking utensil (i.e., the second vacuum degree mentioned above) is obtained by calculation, thereby achieving the purpose of detecting the vacuum degree inside the cooking utensil, and further controlling the vacuum pump according to the calculated vacuum degree, to avoid low accuracy and poor cooking effect caused by directly controlling the vacuum pump by time.

[0043] According to the above embodiment of the present invention, a sampling circuit is connected in series to the power supply circuit of the vacuum extraction device, sampling values ​​are collected by the sampling circuit, and the current vacuum degree of the cooking appliance is obtained according to the first sampling value, the second sampling value, the first time interval and the first working time corresponding to the second sampling value, and the first vacuum degree. Compared with the prior art, there is no need to control the vacuum extraction device by setting the working time, thereby achieving the technical effect of improving the accuracy of vacuum degree detection, reducing the cost of the cooking appliance, and improving the cooking effect, thereby solving the technical problems of low detection accuracy and high cost of the vacuum detection scheme in the prior art.

[0044] Optionally, in the case where the first sampling value is the first sampling value obtained, step S104, obtaining the first time interval and the first working time corresponding to the first sampling value includes: obtaining the time interval between any two adjacent sampling values ​​from the first sampling value and the second sampling value to obtain at least one second time interval and the second working time corresponding to the first sampling value; calculating the sum of at least one second time interval to obtain the first time interval; calculating the sum of the second working time and the first time interval to obtain the first working time.

[0045] In an optional solution, since the longer the time interval between the current sampling value and the historical sampling value, the higher the accuracy of the vacuum degree detection, the first sampling value obtained by the single chip microcomputer can be used as the historical sampling value. After each time the current sampling value is obtained from the sampling circuit, the time interval between the current sampling value and the historical sampling value can be obtained according to the time interval of all sampling values ​​between the current sampling value and the historical sampling value (i.e., the at least one second time interval mentioned above), and the working time of the vacuum pump when the current sampling value is collected can be obtained according to the working time of the vacuum pump when the first sampling value is collected (i.e., the second working time mentioned above). Further, the current vacuum degree can be obtained according to the calculated time interval between the current sampling value and the historical sampling value, the working time of the vacuum pump when the current sampling value is collected, the current sampling value, the historical sampling value and the first vacuum degree, thereby achieving the purpose of detecting the vacuum degree inside the cooking utensil, further achieving the effect of improving the accuracy of vacuum degree detection, reducing the cost of the cooking utensil, and improving the cooking effect.

[0046] Optionally, when the first sampling value is a sampling value adjacent to the second sampling value, step S104, obtaining the first working time corresponding to the first sampling value includes: obtaining the third working time corresponding to the first sampling value; calculating the sum of the third working time and the first time interval to obtain the first working time.

[0047] In an optional solution, after the single-chip microcomputer obtains the current sampling value from the sampling circuit each time, it can use the sampling value obtained the last time adjacent to the current sampling value as the historical sampling value, and obtain the working time of the vacuum pump when the current sampling value is collected according to the time interval between the first sampling value and the adjacent historical sampling value and the working time of the vacuum pump when the historical sampling value is collected (i.e., the third working time mentioned above). Further, the current vacuum degree can be obtained according to the calculated time interval between the current sampling value and the historical sampling value, the working time of the vacuum pump when the current sampling value is collected, the current sampling value, the historical sampling value and the first vacuum degree, so as to achieve the purpose of detecting the vacuum degree inside the cooking utensil, thereby achieving the effect of improving the accuracy of vacuum degree detection, reducing the cost of the cooking utensil, and improving the cooking effect.

[0048] Optionally, step S106, obtaining the second vacuum degree of the cooking appliance according to the first sampling value, the second sampling value, the first time interval, the first working time and the first vacuum degree includes: calculating the difference between the second sampling value and the first sampling value to obtain the first difference; calculating the ratio of the first difference to the first time interval to obtain the first vacuum flow; calculating the product of the first vacuum flow and the first working time to obtain the first vacuum degree change; calculating the sum of the first vacuum degree change and the first vacuum degree to obtain the second vacuum degree.

[0049] In an optional scheme, the sampling difference within the first time interval (i.e., the above-mentioned first difference) can be obtained by calculating the difference between the current sampling value and the historical sampling value, and the change of the sampling value per unit time, that is, the flow value of the vacuum pump per unit time, can be obtained by calculating the ratio of the sampling difference within the first time interval to the first time interval. The change of the vacuum degree within the first working time (i.e., the above-mentioned first change of vacuum degree) is obtained by calculating the product of the flow value per unit time and the working time of the vacuum pump. The current vacuum degree of the cooking appliance is obtained by further calculating the sum of the change of the vacuum degree within the first working time and the first vacuum degree, thereby achieving the purpose of detecting the vacuum degree, further improving the accuracy of vacuum degree detection, reducing the cost of cooking appliances, and improving cooking effects.

[0050] Optionally, when there are multiple first sampling values, there are multiple first time intervals, and there are multiple first working times, wherein step S104, obtaining the first time interval and the first working time corresponding to the second sampling value includes: obtaining the time interval between any two adjacent sampling values ​​from all first sampling values ​​and second sampling values ​​collected after each first sampling value, to obtain at least one third time interval, and a fourth working time corresponding to each first sampling value; calculating the sum of at least one third time interval to obtain each first time interval; calculating the sum of the fourth working time and the first time interval to obtain the first working time.

[0051] In an optional solution, in order to further improve the accuracy of vacuum degree detection, after the single-chip microcomputer obtains the current sampling value from the sampling circuit each time, it can use all the sampling values ​​collected between the current sampling value as historical sampling values, and obtain the time interval between the current sampling value and each historical sampling value according to the time interval of all sampling values ​​between the current sampling value and each historical sampling value (i.e., the at least one third time interval mentioned above), and further obtain the working time of the vacuum pump when the current sampling value is collected according to the working time of the vacuum pump when each historical sampling value is collected (i.e., the fourth working time mentioned above). Furthermore, the current vacuum degree can be obtained according to the calculated time interval between the current sampling value and each historical sampling value, the working time of the vacuum pump when the current sampling value is collected, the current sampling value, each historical sampling value and the first vacuum degree, so as to achieve the purpose of detecting the vacuum degree inside the cooking utensil, thereby achieving the effect of improving the accuracy of vacuum degree detection, reducing the cost of the cooking utensil, and improving the cooking effect.

[0052] Optionally, step S106, obtaining the second vacuum degree of the cooking appliance according to the first sampling value, the second sampling value, the first time interval, the first working time and the first vacuum degree includes: calculating the difference between the second sampling value and each first sampling value to obtain multiple second differences; calculating the ratio of each second difference to the corresponding first time interval to obtain multiple second vacuum flow rates; calculating the product of each second vacuum flow rate and the corresponding first working time to obtain multiple products; calculating the sum of each product and the first vacuum degree to obtain multiple sum values; calculating the average of multiple sum values ​​to obtain the second vacuum degree.

[0053] In an optional solution, since there are multiple historical sampling values, for each historical sampling value, the vacuum degree corresponding to each historical sampling value (that is, the multiple sum values ​​mentioned above) can be calculated by the working time and flow rate, and then the current vacuum degree can be obtained by calculating the average value, thereby achieving the purpose of detecting the vacuum degree, further improving the accuracy of vacuum degree detection, reducing the cost of cooking appliances, and improving the cooking effect.

[0054] It should be noted that the method for calculating the vacuum degree corresponding to each historical sampling value is the same as the method for calculating a single historical sampling value, which will not be repeated here.

[0055] Optionally, in step S106, after obtaining the second vacuum degree of the cooking appliance according to the first sampling value, the second sampling value, the first time interval, the first working time and the first vacuum degree, the vacuum detection method further includes: comparing the second vacuum degree with a preset vacuum degree; if the vacuum degree of the cooking appliance does not reach the preset vacuum degree, returning to execute the steps of acquiring the first sampling value and the second sampling value collected by the sampling circuit until the vacuum degree of the cooking appliance reaches the preset vacuum degree; if the vacuum degree of the cooking appliance reaches the preset vacuum degree, controlling the vacuum extraction device to stop working and storing the second sampling value.

[0056] Specifically, as the vacuum pump works, the vacuum degree inside the cooking utensil will gradually increase. In order to ensure the cooking requirements of the cooking utensil in a vacuum state and prevent the excessive vacuum inside the cooking utensil from affecting normal operation, a preset vacuum degree can be set, for example, -50KP. During the vacuum pumping process, the single-chip microcomputer can compare the current vacuum degree of the cooking utensil obtained by conversion with the preset vacuum degree, so as to determine whether to stop the vacuum pump for vacuuming. When the current vacuum degree of the cooking utensil does not reach the preset vacuum degree, it is determined that the current vacuum degree of the cooking utensil does not meet the cooking requirements, and there is no need to stop the vacuum pump until the current vacuum degree of the cooking utensil reaches the preset vacuum degree. At this time, it is determined that the current vacuum degree of the cooking utensil meets the cooking requirements. The single-chip microcomputer can control the vacuum pump to stop the vacuuming work, realize the control of the working state of the vacuum pumping device, and complete the entire vacuum cooking process.

[0057] In an optional solution, after the current vacuum degree is calculated by the solution provided by the above embodiment of the present invention, the current vacuum degree can be compared with the preset vacuum degree to determine whether to control the vacuum device to stop working, thereby controlling the working state of the vacuum device and completing the entire vacuum cooking process. In addition, in order to facilitate the restart of the vacuum detection device for detection, the sampling value corresponding to the preset vacuum degree can be stored, that is, if the current vacuum degree meets the preset vacuum degree, the current sampling value is stored.

[0058] Optionally, after controlling the vacuum pumping device to stop working, the vacuum detection method also includes: controlling the vacuum pumping device to restart working after a first preset delay time; obtaining a third sampling value collected by the sampling circuit; obtaining a fifth working time based on the third sampling value, the second sampling value and a preset vacuum flow rate, wherein the preset vacuum flow rate is the vacuum flow rate calculated when the first sampling value is the first sampling value obtained and the second sampling value is the second sampling value obtained; controlling the vacuum pumping device to work according to the fifth working time.

[0059] Specifically, after the current vacuum degree of the electric pressure cooker meets the cooking requirements, the vacuum pump can be stopped and the cooking process can be started. During the cooking process, when the electric pressure cooker has sealing failure, air leakage, etc., the vacuum degree of the electric pressure cooker will decrease. In order to prevent the above situation from happening, after the vacuum pump stops the vacuum pumping work, the electric pressure cooker can be controlled to maintain a vacuum state for a period of time, that is, after the vacuum pump stops the vacuum pumping work, a first preset time (for example, 10 minutes) is delayed, and the single-chip microcomputer controls the vacuum pump to perform vacuum pumping again, thereby achieving the purpose of vacuum cooking.

[0060] In an optional solution, after controlling the electric pressure cooker to maintain the vacuum state for the first preset time, the single-chip microcomputer controls the vacuum pump to perform vacuuming again, and collects the current sampling value (i.e., the third sampling value mentioned above) through the acquisition circuit, and obtains the time required for the vacuum degree in the electric pressure cooker to meet the cooking requirements again (i.e., the time the vacuum pump needs to work, i.e., the fifth working time mentioned above) according to the difference between the current sampling value and the stored sampling value, and the flow value calculated for the first time (i.e., the flow value per unit time calculated according to the first sampling value and the second sampling value, i.e., the preset vacuum flow), and controls the vacuum pump to work according to the time. After the vacuum pump performs vacuuming again, the time the vacuum pump needs to work can be calculated, and the working state of the vacuum pump can be controlled by time, thereby achieving the purpose of vacuum cooking of the cooking appliance.

[0061] Optionally, obtaining the fifth working time according to the third sampling value, the second sampling value and the preset vacuum flow rate includes: calculating the difference between the second sampling value and the third sampling value to obtain the third difference; calculating the product of the third difference and the preset vacuum flow rate to obtain the fifth working time.

[0062] In an optional scheme, the difference between the sampling value collected by the vacuum pump after the vacuum pump performs the vacuum operation and the sampling value stored previously (i.e., the third difference mentioned above) can be calculated, and then multiplied with the flow value obtained by the first calculation to obtain the time the vacuum pump needs to work, and the vacuum pump is further controlled according to the calculated time, thereby achieving the purpose of vacuum cooking of the cooking appliance.

[0063] Optionally, obtaining the first sampling value includes: starting timing when the vacuum device starts to work; when the timing time reaches a second preset time, obtaining the sampling value collected by the sampling circuit to obtain the first sampling value.

[0064] Specifically, in order to obtain accurate vacuum degree, the sampling value collected by the sampling circuit can be obtained as the first sampling value after a period of time (i.e., the second preset time mentioned above, for example, 1s-30s) after the vacuum extraction device starts, so as to further improve the accuracy of vacuum degree detection, reduce the cost of cooking appliances, and improve cooking effects.

[0065] Optionally, obtaining the first vacuum degree includes one of the following: obtaining a first preset value, and using the first preset value as the first vacuum degree; obtaining a second working time corresponding to the first sampling value, and obtaining the first vacuum degree based on the first sampling value and the second working time; obtaining a time range to which the second working time belongs, and using the vacuum degree corresponding to the time range as the first vacuum degree; obtaining a second preset value, and calculating the product of the second working time and the second preset value to obtain the first vacuum degree.

[0066] In the first optional scheme, a default value (i.e., the first preset value mentioned above) can be pre-stored in the single-chip microcomputer. For example, the default value can be 0, and the default value is used as the first vacuum degree. Regardless of the length of the second preset time, the first vacuum degree does not change, thereby simplifying the vacuum degree calculation process, shortening the control time, and improving the vacuum pump control efficiency.

[0067] In the second optional scheme, after the vacuum pump performs vacuum extraction, the longer the second preset time is, the smaller the vacuum degree in the electric pressure cooker is. The vacuum degree in the electric pressure cooker (i.e., the first vacuum degree mentioned above) can be calculated based on the first sampling value and the working time of the vacuum pump when the first sampling value is collected.

[0068] In the third optional scheme, after the vacuum pump performs vacuum extraction, the longer the second preset time is, the smaller the vacuum degree in the electric pressure cooker is. Multiple time ranges can be pre-set, for example, the time range is 0-5s, 6-10s, 11-20s, 21-30s. The shorter the vacuum pump running time is, the greater the vacuum degree is. For example, the vacuum degree corresponding to 0-5s can be set to 0, and the vacuum degree corresponding to 6-10s can be set to -10KP. When the first sampling value is collected and the working time of the vacuum pump is 0-5s, the first vacuum degree is determined to be 0.

[0069] In the fourth optional scheme, after the vacuum pump performs vacuum extraction, the longer the second preset time is, the smaller the vacuum degree in the electric pressure cooker is, the second preset value can be set in advance. For example, the second preset value can be -1KP. The first vacuum degree is obtained by calculating the product of the working time of the vacuum pump when the first sampling value is collected and the second preset value.

[0070] Figure 2 is a flow chart of an optional first start-up operation of a vacuum pumping device according to an embodiment of the present invention, Figure 3 1 is a flow chart of an optional vacuum pumping device restarting operation according to an embodiment of the present invention. Figure 2 and Figure 3 Taking the cooking utensil as an electric pressure cooker and the first vacuum degree as 0 as an example, a preferred embodiment of the present invention is described in detail.

[0071] like Figure 2 As shown, the vacuum pump detection method may include the following steps:

[0072] Step S21, start vacuum cooking.

[0073] Optionally, after the electric pressure cooker is powered on, the user may select a vacuum cooking function (eg, vacuum marinating) so that the electric pressure cooker starts vacuum cooking.

[0074] Step S22, start the vacuum pump and start timing T1.

[0075] Optionally, the single chip microcomputer controls the vacuum pump to start, perform vacuuming work, and simultaneously starts the timer to begin timing.

[0076] Step S23, when the timing reaches T1, the single chip microcomputer collects the sample value AD1 and starts timing T2.

[0077] Optionally, when the timing time of the timer reaches T1, the AD sampling function of the single-chip microcomputer is started, and the first AD value, ie, AD1, is collected, and at the same time, the timer is cleared and the timing is restarted.

[0078] Step S24, when the timing reaches T2, the single chip microcomputer collects the sample value AD2.

[0079] Optionally, when the timing time of the timer reaches T2, the AD sampling function of the single-chip microcomputer is started, and a second AD value, namely AD2, is collected.

[0080] Step S25, calculate the sampling change value S1=AD2-AD1 within the time T2, and obtain the vacuum flow S10=S1 / T2.

[0081] Optionally, the sampling difference S1 at time T2 may be obtained, and the flow value S10 per unit time may be further obtained.

[0082] Step S26, determining whether the vacuum degree T10*S10 reaches the set value within the total working time T10.

[0083] Optionally, when the sampling value AD2 is collected, the total working time T10 = T1 + T2, T10*S10 is calculated to obtain the current vacuum degree, and compared with the set value. If it is reached, go to step S27; if it is not reached, continue to execute step S26, clear the timer and restart the timing. When the timer reaches another time, start the AD sampling function of the microcontroller, and collect a new sampling value, and continue to judge whether T10*S10 reaches the set value. If it is reached, go to step S27; if it is not reached, continue to execute step S26 to obtain the next new sampling value.

[0084] Step S27, store the current sampling value AD3 and stop the vacuum pump.

[0085] Optionally, when it is determined that the current vacuum degree reaches the set value, the vacuum pump can be controlled to stop working and the current sampling value AD3 can be stored. That is, if the current vacuum degree calculated when the sampling value AD2 is collected reaches the set value, the sampling value AD2 is stored; if the current vacuum degree calculated when a new sampling value is collected reaches the set value, the new sampling value is stored.

[0086] After entering the vacuum maintenance stage, the vacuum detection method is as follows Figure 3 As shown, the specific steps include:

[0087] Step S31, the vacuum degree inside the pot body decreases.

[0088] Step S32, start the vacuum pump.

[0089] Optionally, after the vacuum pump stops working, if the electric pressure cooker is not tightly sealed or leaks, the vacuum degree inside the cooker will decrease. Therefore, the vacuum pump can be restarted after a preset time to start vacuuming.

[0090] Step S33, obtaining the sampling value AD4.

[0091] Optionally, when the vacuum pump starts to work, the single chip microcomputer collects the AD value, namely AD4.

[0092] Step S34, obtain the difference S3 = AD3-AD4 between the sampling value and the set value, and then the time required to work again is T3 = S3*S10.

[0093] Optionally, the sampling difference between the sampling value AD3 stored before stopping the work is calculated, and the time T3 = S3*S10 required to start the vacuum pump is calculated based on the flow value S10 obtained by the first calculation, and the timer is controlled to start timing.

[0094] Step S35, start the vacuum pump to work until T3, and stop working after reaching T3.

[0095] Optionally, when the timing time of the timer reaches T3, it can be determined that the vacuum degree inside the pot body reaches a set value, and the vacuum pump can be controlled to stop working.

[0096] Through the above scheme, a detection circuit can be set in the power supply circuit of the vacuum pump. When the vacuum pump starts to evacuate, the timing device is started, and the timing periods T1 and T2 are set respectively. The change S1 of the sampling value in the T2 time period can be used to obtain the change of the sampling value per unit time, that is, the flow rate of the vacuum extraction device. By calculating the product of the working time of the vacuum pump and the flow rate, the current vacuum degree can be obtained. The current vacuum degree is further compared with the set vacuum degree to control the working state of the vacuum pump, thereby improving the accuracy of vacuum degree detection, reducing the cost of cooking utensils, and improving cooking effects.

[0097] Example 2

[0098] According to an embodiment of the present invention, an embodiment of a vacuum detection system is provided.

[0099] Figure 4 is a schematic diagram of a vacuum detection system according to an embodiment of the present invention. Figure 4 As shown, the system includes: a vacuum pumping device 41, a sampling circuit 43 and a controller 45.

[0100] Among them, the first end of the vacuum device 41 is connected to a DC power supply; the first end of the sampling circuit 43 is connected to the second end of the vacuum device 41, and the second end of the sampling circuit 43 is grounded, and is used to collect multiple sampling values ​​during the operation of the vacuum device 41; the sampling end of the controller 45 is connected to the first end of the sampling circuit 43, and is used to obtain the first sampling value, the second sampling value and the first vacuum degree, as well as the first time interval and the first working time corresponding to the second sampling value, and obtain the second vacuum degree of the cooking appliance according to the first sampling value, the second sampling value, the first time interval, the first working time and the first vacuum degree, wherein the first vacuum degree is the vacuum degree corresponding to the first sampling value obtained, the first time interval is used to characterize the time interval from collecting the first sampling value to collecting the first sampling value, and the first working time is used to characterize the working time of the vacuum device 41 when the first sampling value is collected.

[0101] Optionally, the cooking appliance may be an electric pressure cooker.

[0102] Optionally, the vacuum device 41 is a vacuum pump.

[0103] Specifically, the sampling circuit 43 can be connected in series to the power supply circuit of the vacuum pump, and can include: a collection resistor, the resistance value of the collection resistor can be 1.5Ω, the controller 45 can be a single-chip microcomputer inside the cooking appliance, and the AD port (analog-to-digital conversion, which is the abbreviation of Analog-to-Digital) of the single-chip microcomputer is connected to the sampling circuit 43, and the single-chip microcomputer can detect the voltage value of the sampling resistor through the AD port, and obtain the sampling value through AD conversion; the first vacuum degree can be the initial vacuum degree of the cooking appliance in a non-vacuum state, which can be a default value or calculated by the first sampling value, and the first vacuum degree can be 0 or not 0; the cooking appliance can be an electric pressure cooker, an electric rice cooker, a food processor, etc. In the embodiment of the present invention, an electric pressure cooker is used as an example for explanation.

[0104] In an optional scheme, a sampling circuit 43 can be connected in series to the power supply circuit of the vacuum pump. During the vacuum pump's vacuum extraction operation, the single-chip microcomputer can collect the current sampling value (i.e., the second sampling value mentioned above) in real time, and based on the current sampling value, the historical sampling value (i.e., the first sampling value mentioned above), the time interval between the current sampling value and the historical sampling value (i.e., the first time interval mentioned above), the working time (i.e., the first working time mentioned above) and the first vacuum degree of the vacuum pump when the current sampling value is collected, the current vacuum degree (i.e., the second vacuum degree mentioned above) of the cooking utensil is obtained by calculation, thereby achieving the purpose of detecting the vacuum degree inside the cooking utensil, and further controlling the vacuum pump according to the calculated vacuum degree, to avoid low accuracy and poor cooking effect caused by directly controlling the vacuum pump by time.

[0105] According to the above embodiment of the present invention, a sampling circuit 43 is connected in series to the power supply circuit of the vacuum device 41, and a sampling value is collected by the sampling circuit 43. The current vacuum degree of the cooking appliance is obtained according to the first sampling value, the second sampling value, the first time interval and the first working time corresponding to the second sampling value, and the first vacuum degree. Compared with the prior art, there is no need to control the vacuum device 41 by setting the working time, thereby achieving the technical effect of improving the accuracy of vacuum degree detection, reducing the cost of cooking appliances, and improving cooking effects, thereby solving the technical problems of low detection accuracy and high cost of the vacuum detection scheme in the prior art.

[0106] Figure 5 is a schematic diagram of an optional vacuum detection system according to an embodiment of the present invention, Figure 5 A preferred embodiment of the present invention is described in detail.

[0107] like Figure 5 As shown, the transistor Q5 and the sampling resistor R42 can be connected in series in the power supply circuit of the vacuum pump, wherein the collector of Q5 is connected to the vacuum pump, the emitter of Q5 is grounded through R42, the emitter of Q5 is connected to the AD port of the single-chip microcomputer through the protection resistor R43, the base of Q5 is connected to the I / O port of the single-chip microcomputer through the protection resistor R19, the model of Q5 is D882, the resistance value of R42 is 1.5Ω, and the resistance values ​​of R43 and R19 are 1KΩ. The single-chip microcomputer can control the conduction of Q5 through the I / O port, and the vacuum pump starts to evacuate. The single-chip microcomputer can collect the voltage value at both ends of R42 through the AD port, and convert the voltage value into the corresponding AD value through AD conversion. The control program can be controlled according to Figure 2 and Figure 3 The process shown is used to test the vacuum degree.

[0108] Through the above scheme, a detection circuit can be set in the power supply circuit of the vacuum pump, and the timing device can be started when the vacuum pump starts to evacuate the vacuum, and the timing periods T1 and T2 are set respectively. The change S1 of the sampling value in the T2 time period can be used to obtain the change of the sampling value per unit time, that is, the flow rate of the vacuum extraction device 41. The current vacuum degree can be obtained by calculating the product of the working time of the vacuum pump and the flow rate, and the current vacuum degree is further compared with the set vacuum degree to control the working state of the vacuum pump, thereby improving the accuracy of vacuum degree detection, reducing the cost of cooking utensils, and improving cooking effects.

[0109] Example 3

[0110] According to an embodiment of the present invention, there is provided an embodiment of a cooking appliance, comprising: the vacuum detection system in the above-mentioned embodiment 2.

[0111] Optionally, the cooking appliance is an electric pressure cooker.

[0112] Example 4

[0113] According to an embodiment of the present invention, an embodiment of a storage medium is provided, wherein the storage medium includes a stored program, wherein when the program is running, the device where the storage medium is located is controlled to execute the vacuum detection method in the above-mentioned embodiment 1.

[0114] Example 5

[0115] According to an embodiment of the present invention, an embodiment of a processor is provided, and the processor is used to run a program, wherein the vacuum detection method in the above-mentioned embodiment 1 is executed when the program is run.

[0116] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0117] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0118] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0119] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0120] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0121] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.

[0122] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A vacuum detection method, characterized in that: include: After the vacuum pumping device starts working, a first sampling value, a second sampling value and a first vacuum degree collected by the sampling circuit are obtained, wherein the first vacuum degree is the vacuum degree corresponding to the first sampling value obtained; Acquire a first time interval and a first working time corresponding to the second sampling value, wherein the first time interval is used to represent the time interval from when the first sampling value is collected to when the second sampling value is collected, and the first working time is used to represent the working time of the vacuum device when the second sampling value is collected; A second vacuum degree of the cooking appliance is obtained according to the first sampling value, the second sampling value, the first time interval, the first working time and the first vacuum degree.

2. The vacuum detection method according to claim 1, characterized in that: In a case where the first sampling value is the first acquired sampling value, acquiring a first time interval and a first working time corresponding to the first sampling value includes: Obtaining the time interval between any two adjacent sampling values ​​from the first sampling value and the second sampling value to obtain at least one second time interval and a second working time corresponding to the first sampling value; In response to the second time interval being one, determining the second time interval to be the first time interval; In response to there being a plurality of second time intervals, calculating a sum of the plurality of second time intervals to obtain the first time interval; The sum of the second working time and the first time interval is calculated to obtain the first working time.

3. The vacuum detection method according to claim 1, characterized in that: In a case where the first sampling value is a sampling value adjacent to the second sampling value, obtaining a first working time corresponding to the first sampling value includes: Obtaining a third working time corresponding to the first sampling value; The sum of the third working time and the first time interval is calculated to obtain the first working time.

4. The vacuum detection method according to claim 2 or 3, characterized in that: Obtaining a second vacuum degree of the cooking appliance according to the first sampling value, the second sampling value, the first time interval, the first working time, and the first vacuum degree comprises: Calculating a difference between the second sampling value and the first sampling value to obtain a first difference; calculating a ratio of the first difference to the first time interval to obtain a first vacuum flow rate; Calculating the product of the first vacuum flow rate and the first working time to obtain a first vacuum degree change; The sum of the first vacuum degree change amount and the first vacuum degree is calculated to obtain the second vacuum degree.

5. The vacuum detection method according to claim 1, characterized in that: In the case where there are multiple first sampling values, there are multiple first time intervals, and there are multiple first working times, obtaining the first time interval and the first working time corresponding to the second sampling value includes: Obtain the time interval between any two adjacent sampling values ​​from all first sampling values ​​and the second sampling values ​​collected after each first sampling value, to obtain at least one third time interval and a fourth working time corresponding to each first sampling value; In response to the third time interval being one, determining the third time interval to be each first time interval; In response to the third time interval being multiple, calculating the sum of the multiple third time intervals to obtain each first time interval; The sum of the fourth working time and the first time interval is calculated to obtain the first working time.

6. The vacuum detection method according to claim 5, characterized in that: Obtaining a second vacuum degree of the cooking appliance according to the first sampling value, the second sampling value, the first time interval, the first working time, and the first vacuum degree comprises: Calculate the difference between the second sampling value and each of the first sampling values ​​to obtain a plurality of second difference values; Calculating the ratio of each second difference to the corresponding first time interval to obtain a plurality of second vacuum flow rates; Calculating the product of each second vacuum flow rate and the first working time to obtain a plurality of products; Calculating the sum of each product and the first vacuum degree to obtain a plurality of sums; An average of the plurality of sum values ​​is calculated to obtain the second vacuum degree.

7. The vacuum detection method according to claim 1, characterized in that: After obtaining a second vacuum degree of the cooking appliance according to the first sampling value, the second sampling value, the first time interval, the first working time, and the first vacuum degree, the vacuum detection method further includes: comparing the second vacuum degree with a preset vacuum degree; If the vacuum degree of the cooking appliance does not reach the preset vacuum degree, returning to the step of acquiring the first sampling value and the second sampling value collected by the sampling circuit until the vacuum degree of the cooking appliance reaches the preset vacuum degree; If the vacuum degree of the cooking appliance reaches the preset vacuum degree, the vacuum extraction device is controlled to stop working and the second sampling value is stored.

8. The vacuum detection method according to claim 7, characterized in that: After controlling the vacuum pumping device to stop working, the vacuum detection method further includes: After a delay of a first preset time, controlling the vacuum pumping device to restart operation; Acquire a third sampling value collected by the sampling circuit; A fifth working time is obtained according to the third sampling value, the second sampling value and a preset vacuum flow rate, wherein the preset vacuum flow rate is a vacuum flow rate calculated when the first sampling value is the first sampling value obtained and the second sampling value is the second sampling value obtained; The vacuum pumping device is controlled to operate according to the fifth operating time.

9. The vacuum detection method according to claim 8, characterized in that: According to the third sampling value, the second sampling value and the preset vacuum flow rate, obtaining the fifth working time includes: Calculating a difference between the second sampling value and the third sampling value to obtain a third difference; The product of the third difference and the preset vacuum flow is calculated to obtain the fifth working time.

10. The vacuum detection method according to claim 1, characterized in that: Getting the first sample value includes: When the vacuum device starts to work, start timing; When the timing time reaches the second preset time, the sampling value collected by the sampling circuit is acquired to obtain the first sampling value.

11. The vacuum detection method according to claim 1, characterized in that: Obtaining the first vacuum degree includes one of the following: Obtaining a first preset value, and using the first preset value as the first vacuum degree; Acquire a second working time corresponding to the first sampling value, and obtain the first vacuum degree according to the first sampling value and the second working time; Acquire a time range to which the second working time belongs, and use the vacuum degree corresponding to the time range as the first vacuum degree; A second preset value is obtained, and the product of the second working time and the second preset value is calculated to obtain the first vacuum degree.

12. A vacuum detection system, characterized in that: include: A vacuum pumping device, wherein a first end of the vacuum pumping device is connected to a DC power supply; A sampling circuit, wherein a first end of the sampling circuit is connected to a second end of the vacuum pumping device, and a second end of the sampling circuit is grounded, and is used to collect a plurality of sampling values ​​during the operation of the vacuum pumping device; A controller, wherein a sampling end of the controller is connected to a first end of the sampling circuit, and is used to obtain a first sampling value, a second sampling value and a first vacuum degree, as well as a first time interval and a first working time corresponding to the second sampling value, and obtain a second vacuum degree of the cooking appliance according to the first sampling value, the second sampling value, the first time interval, the first working time and the first vacuum degree, wherein the first vacuum degree is the vacuum degree corresponding to the first sampling value obtained, the first time interval is used to characterize the time interval from collecting the first sampling value to collecting the second sampling value, and the first working time is used to characterize the working time of the vacuum extraction device when the first sampling value is collected.

13. The vacuum detection system according to claim 12, characterized in that: The vacuum pump is a vacuum pump.

14. A cooking utensil, characterized in that: include: A vacuum detection system as claimed in claim 12 or 13.

15. The cooking appliance according to claim 14, characterized in that The cooking utensil is an electric pressure cooker.

16. A storage medium, characterized in that: The storage medium includes a stored program, wherein when the program is executed, the device where the storage medium is located is controlled to execute the vacuum detection method according to any one of claims 1 to 11.

17. A processor, characterized in that: The processor is used to run a program, wherein the vacuum detection method according to any one of claims 1 to 11 is executed when the program is run.

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