Induction cooker power control method, device and induction cooker

Abstract

The present invention is applicable to the technical field of electrical equipment, and provides an induction cooker power control method, device and induction cooker, the method comprising: when detecting that the induction cooker has lost a pot, controlling the induction cooker to output a preset driving power; monitoring whether the induction cooker detects the pot again within a preset time; when the induction cooker detects the pot again within a preset time, controlling the induction cooker to restore to the output power before the pot was lost. The present application controls the induction cooker to output a preset driving power within a preset time to continuously heat the pot when the induction cooker has lost a pot, and when the induction cooker detects the pot again, controls the induction cooker to restore to the output power before the pot was lost, without first detecting the pot by pulse pot detection, and then soft-starting the heating, shortening the soft-start time, thereby ensuring that the induction cooker continues to heat the pot during the process of flipping the pot, so that the induction cooker meets the cooking temperature requirements when flipping the pot, and realizes the function of flipping the pot to cook.

Description

Technical Field

[0001] The present invention belongs to the technical field of electrical equipment, and in particular relates to an induction cooker power control method and device, and an induction cooker. Background Art

[0002] An induction cooker is an electrical device that heats through electromagnetic induction. Its working principle is to use alternating current to pass through a coil to generate an alternating magnetic field with a constantly changing direction. Eddy current will appear inside the conductor in the alternating magnetic field, and the Joule heating effect of the eddy current will cause the conductor to heat up, thereby achieving heating.

[0003] When using an induction cooker, the pot needs to be placed on the surface of the induction cooker. When the user takes the pot away from the induction cooker during cooking, the induction cooker detects that the pot has been lost and shuts down the internal IGBT circuit, thereby avoiding tube explosion and ensuring product safety. Some users flip the pot when cooking. During the continuous flipping process, the contact time between the pot and the cooker surface is short or even non-existent, resulting in the induction cooker not being able to detect the pot. The induction cooker shuts down the internal IGBT circuit, and at this time the induction cooker has no power output, and heating stops, making it impossible to flip the pot for cooking. Moreover, the induction cooker will only soft-start after the pot is detected again after the pot is stopped. However, the time it takes for the induction cooker to turn off the IGBT circuit and soft-start again to restore to the previous power is long. It usually takes 4 to 6 seconds to reach the power before flipping the pot, making it impossible to flip the pot for cooking. Summary of the invention

[0004] The embodiment of the present invention provides an induction cooker power control method, aiming to solve the problem that the existing induction cooker cannot cook food due to long shutdown, pot inspection and soft start time during the pot flipping process.

[0005] The embodiment of the present invention is implemented as follows: a method for controlling power of an induction cooker, comprising:

[0006] When the induction cooker is detected to have lost a pot, the induction cooker is controlled to output a preset driving power;

[0007] Monitor whether the induction cooker detects the pot again within a preset time;

[0008] When the induction cooker detects the pot again within the preset time, the induction cooker is controlled to restore the output power to that before the pot was lost.

[0009] Optionally, before the step of detecting that the pot is lost on the induction cooker, the method further includes:

[0010] Acquire detection information of a pot-less detection device of an induction cooker for real-time detection of pots;

[0011] It is determined whether the induction cooker has lost the pot according to the detection information.

[0012] Optionally, controlling the induction cooker to output a preset driving power includes:

[0013] By adjusting the frequency or pulse width of the IGBT of the induction cooker, the induction cooker is controlled to output the driving power.

[0014] Optionally, controlling the induction cooker to output a preset driving power includes:

[0015] By adjusting the frequency or pulse width of the IGBT of the induction cooker, the driving power of the induction cooker is controlled to gradually decrease over a preset time.

[0016] Optionally, after the step of monitoring whether the induction cooker detects the cooker again within a preset time, the method further comprises:

[0017] When the induction cooker fails to detect the pot within the preset time, it is confirmed that the induction cooker is in a completely pot-lost state, and the induction cooker is controlled to stop working.

[0018] Optionally, after the step of controlling the induction cooker to restore the output power to the level before the pot is lost, the method further comprises the following steps:

[0019] Get the real-time operating power of the induction cooker;

[0020] When the real-time operating power is greater than a preset power threshold, the operating parameters of the IGBT of the induction cooker are adjusted until the real-time operating power is less than the power threshold.

[0021] Optionally, the preset time is 200 milliseconds to 2 seconds.

[0022] Optionally, the preset time is 300 milliseconds to 800 milliseconds.

[0023] Optionally, when it is detected that the induction cooker has lost a pot, the step of controlling the induction cooker to output a preset driving power includes:

[0024] When it is detected that the induction cooker has lost the pot, the induction cooker is controlled to stop power output, and when a preset first time threshold is reached, the induction cooker is controlled to output a preset driving power, where the first time threshold is less than the preset time.

[0025] In a second aspect, the present application further provides an induction cooker power control device, the device comprising:

[0026] A first pot-lost preprocessing unit is used to control the induction cooker to output a preset driving power when detecting that the induction cooker has lost a pot;

[0027] The first pot-lost monitoring unit is used to monitor whether the induction cooker detects the pot again within a preset time;

[0028] The first pot detection execution unit is used to control the induction cooker to restore the output power to that before the pot is lost when the induction cooker detects the pot again within the preset time.

[0029] Optionally, the device further comprises:

[0030] A first information acquisition unit is used to acquire detection information of a pot-free detection device of an induction cooker performing real-time detection on a pot;

[0031] The first pot-lost judging unit is used to judge whether the pot is lost in the induction cooker according to the detection information.

[0032] Optionally, the lost pot pretreatment unit includes:

[0033] The first power adjustment subunit is used to control the induction cooker to output the driving power by adjusting the frequency or pulse width of the IGBT of the induction cooker.

[0034] Optionally, the lost pot pretreatment unit includes:

[0035] The second power adjustment subunit is used to control the driving power of the induction cooker to gradually decrease over a preset time by adjusting the frequency or pulse width of the IGBT of the induction cooker.

[0036] Optionally, the device further comprises:

[0037] The first pot-lost processing unit is used for confirming that the induction cooker is in a completely pot-lost state and controlling the induction cooker to stop working when the induction cooker fails to detect the pot within the preset time.

[0038] Optionally, the device further comprises:

[0039] A first power acquisition unit, used to acquire the real-time operating power of the induction cooker;

[0040] The first parameter adjustment unit is used to adjust the working parameters of the IGBT of the induction cooker when the real-time operating power is greater than a preset power threshold, until the real-time operating power is less than the power threshold.

[0041] Optionally, the preset time is 200 milliseconds to 2 seconds.

[0042] Optionally, the preset time is 300 milliseconds to 800 milliseconds.

[0043] Optionally, the first lost pot pretreatment unit includes:

[0044] The first pot-lost preprocessing subunit is used to control the induction cooker to stop power output when it is detected that the pot is lost, and to control the induction cooker to output a preset driving power when a preset first time threshold is reached, and the first time threshold is less than the preset time.

[0045] In a third aspect, the present application further provides an induction cooker, wherein the system includes the induction cooker power control device as described above.

[0046] The embodiment of the present application detects the pot during the use of the induction cooker. When the user uses the induction cooker to flip the pot for cooking, the pot will move back and forth relative to the induction cooker, and the induction cooker will cycle into the pot-dropping and pot-detecting states. When it is detected that the induction cooker has lost the pot, the induction cooker is first controlled to output a preset driving power, so that there is continuous power output to heat the pot. When the pot contacts the stove surface and the induction cooker detects the pot again, the induction cooker is controlled to restore the output power before the pot is dropped. There is no need to first detect the pot by pulse pot detection and then soft-start heating. During the continuous inversion of the pot for cooking, there is continuous power output, and when detecting the pot, the induction cooker can restore to the output power before the pot is dropped within 400 milliseconds, thereby shortening the soft start time, thereby ensuring that the induction cooker continues to heat the pot during the inversion of the pot for cooking, thereby realizing the inversion of the pot for cooking function. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a specific flow chart of an embodiment of the induction cooker power control method of the present application;

[0048] Figure 2 It is a schematic diagram of a flow chart of detecting whether a pot is lost in an induction cooker according to an embodiment of the induction cooker power control method of the present application;

[0049] Figure 3 This is a basic flow chart of regulating the power of an induction cooker according to an embodiment of the induction cooker power control method of the present application;

[0050] Figure 4 It is a specific flow chart of another embodiment of the induction cooker power control method of the present application;

[0051] Figure 5 It is a module schematic diagram of an embodiment of the induction cooker power control device of the present application;

[0052] Figure 6 It is a schematic diagram of waveform simulation after the induction cooker loses the pot in the related art;

[0053] Figure 7 This is a schematic diagram of a pan flipping waveform of an embodiment of the induction cooker power control method of the present application;

[0054] Figure 8 This is a waveform diagram of an induction cooker completely losing the pot in an embodiment of the induction cooker power control method of the present application.

[0055] Fig. 9 This is a waveform diagram of flipping a pan in another embodiment of the induction cooker power control method of the present application;

[0056] Fig.10This is a waveform diagram of another embodiment of the induction cooker power control method of the present application when the induction cooker completely loses the pot. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0058] When the existing induction cooker flips the pot continuously, the contact time between the pot and the stove surface is short or even non-existent, resulting in the induction cooker failing to detect the pot. The induction cooker turns off the internal IGBT circuit, and at this time the induction cooker has no power output, and the heating stops, resulting in the inability to flip the pot and cook. Moreover, the induction cooker will only perform a soft start after the pot is detected again after the pot is stopped. However, the time taken for the induction cooker to restore to the previous power after the IGBT circuit is turned off and the soft start after the pot is pulsed again is relatively long, making it impossible to flip the pot and cook. The embodiment of the present application continuously heats the pot during the process of flipping the pot, and when the pot is detected again after the pot is thrown, the output power before the pot is thrown can be quickly restored, shortening the soft start time, thereby ensuring that the induction cooker stably heats the pot and meets the cooking temperature requirements when flipping the pot.

[0059] Embodiment 1

[0060] In some alternative embodiments, please refer to Figure 1 , Figure 1 It is a schematic diagram of an embodiment of an induction cooker power control method of the present application.

[0061] like Figure 1 As shown, the first aspect of the present application provides an induction cooker power control method, comprising steps S1100 to S1300:

[0062] S1100, when it is detected that the induction cooker has lost the pot, controlling the induction cooker to output a preset driving power;

[0063] During implementation, the induction cooker may be provided with a processor, and the steps of the induction cooker power control method provided in the present application are implemented by the processor. The processor may be an actual processor provided on the induction cooker, or a virtual processor in the cloud, and no specific limitation is made here.

[0064] After the induction cooker starts heating, it will continue to detect whether the pot is lost. In the related art, after the induction cooker detects that the pot is lost, it will turn off the IGBT to stop heating, and then perform pulse pot detection. After the pot is detected, soft start heating is performed. According to the measured data, see Figure 6As shown, it takes 1 second for the induction cooker to go from dropping the pot to the pot detection point, and 3-5 seconds for soft start. As a result, each time the pot is dropped, the induction cooker needs 4-6 seconds to reach the previous power. During the process of flipping the pot to cook, the pot will be flipped over quickly, causing the pot to be dropped, which makes it impossible to cook.

[0065] During implementation, a pot-free detection device is provided in the induction cooker for detecting whether the pot is missing from the induction cooker. It should be noted that the pot-free detection device is a commonly used device in induction cookers and will not be described in detail here.

[0066] When the induction cooker is detected to have lost the pot, the system controls the induction cooker to output the preset driving power within the preset time. During implementation, for the induction cooker of the half-bridge solution, the frequency of the IGBT of the induction cooker can be adjusted to control the induction cooker to output the driving power, for example, the frequency of the IGBT of the induction cooker is controlled to be fixed at a certain frequency value or frequency range, thereby controlling the induction cooker to output the driving power. In some embodiments, for the induction cooker of the single-tube resonance solution, the conduction pulse width of the IGBT of the induction cooker can be adjusted to control the induction cooker to output the driving power, for example, the conduction pulse width of the IGBT of the induction cooker is controlled to be fixed at a certain width value or width range, thereby controlling the induction cooker to output the driving power.

[0067] In other embodiments, the frequency or pulse width of the IGBT of the induction cooker can be adjusted to control the driving power of the induction cooker to gradually decrease with the preset time. For example, the frequency of the IGBT of the induction cooker can be controlled to gradually decrease. For example, the preset time is divided into N time nodes. At each time node, the frequency of the IGBT of the induction cooker is controlled to decrease by 10%. While satisfying the pan flipping, the driving consumption is reduced, which can ensure that the IGBT is safer. The driving power can be obtained by the manufacturer through a pan flipping experiment test, and is not specifically limited here.

[0068] In some embodiments, for an induction cooker with a half-bridge solution, taking the constant frequency of the IGBT of the induction cooker as an example, when it is detected that the pot is lost, the frequency of the IGBT is reduced to 80% of the frequency during normal operation. In other embodiments, for an induction cooker with a single-tube solution, when it is detected that the pot is lost, the pulse width of the IGBT is reduced to 80% of the pulse width during normal operation. At this time, the induction cooker does not need to be turned off and the LC resonance is maintained. The induction cooker outputs driving power within a preset time, and the current of the induction cooker does not increase, which will not cause the tube to explode, thereby protecting the safety of the induction cooker circuit.

[0069] S1200, monitoring whether the induction cooker detects the pot again within a preset time;

[0070] When using an induction cooker to cook, the user may flip the pot to cook, or may simply remove the pot from the cooker, for example, when putting the dish on a plate, the user may remove the pot from the induction cooker.

[0071] After the system controls the induction cooker to output the preset driving power output, it monitors whether the induction cooker detects the pot again within the preset time. Taking the preset time of 0.8 seconds as an example, when the induction cooker is detected to have lost the pot, the system controls the induction cooker to output the preset driving power output, for example, by controlling the IGBT output of the induction cooker to output the preset driving power output at a certain frequency so that the current does not rise, and then monitors whether the induction cooker detects the pot within 0.8 seconds. Whether the pot is detected can be determined based on the detection current or power size. The half-bridge solution can also be determined by detecting the current phase, which is not specifically limited here. If the induction cooker detects the pot within the preset time, step S1300 is executed.

[0072] Optionally, the preset time can be set according to the frequency of the user flipping the pot. For example, after testing, the induction cooker manufacturer sets the preset time to 200 milliseconds to 2 seconds. Preferably, the preset time is 300 milliseconds to 800 milliseconds, which can take into account the effect of flipping the pot and avoid excessive loss of IGBT due to too long a time. The preset time can be entered by the manufacturer before the equipment leaves the factory or when it is installed. It should be noted that the above-mentioned preset time value and preset driving power are only an example, not a limitation of the present application. On the contrary, in other embodiments of the present invention, adaptive adjustments can be made according to different usage environments and requirements, so that when the induction cooker throws the pot, there is power output to heat the pot without exploding the tube.

[0073] S1300, controlling the induction cooker to restore to the output power before the pot was lost.

[0074] When the induction cooker loses the pot and detects the pot again within a preset time, the system controls the induction cooker to restore the output power to that before the pot was lost. During implementation, the output power before the pot was lost is the output power of the induction cooker's working mode before the pot was lost. For example, the induction cooker includes but is not limited to stir-frying, hot pot, frying, and steaming modes. Taking the user using the stir-frying mode to cook as an example, the user flips the pot during the cooking process, and the pot can be detected by the pot-free detection device.

[0075] In the pot-dropping stage, when it is detected that the induction cooker has dropped the pot, the IGBT of the induction cooker is controlled to output a preset driving power to continue heating the pot.

[0076] During the pot detection stage, when the induction cooker detects the pot again within the preset time, the induction cooker is controlled to restore the output power to the stir-fry mode.

[0077] The pan flipping waveform of the induction cooker power control method of the present application is as follows Figure 7As shown, when the induction cooker throws the pot, it controls the IGBT to reduce the frequency so that the induction cooker outputs the preset driving power. At this time, the induction cooker has power output. When the pot returns to its original position, the induction cooker detects the pot again. The induction cooker can recover to the output power before the pot is thrown in 200-400 milliseconds, thereby continuously heating the pot during the pot flipping process, thus realizing the pot flipping function of the induction cooker. In some optional embodiments, the system loops through the above steps S1100 to S1300 until the pot flipping is completed. The induction cooker pot flipping waveform in a single cycle of the induction cooker power control method of the present application is as follows: Figure 7 shown.

[0078] The embodiment of the present application detects the pot during the use of the induction cooker. When the user uses the induction cooker to flip the pot for cooking, the pot will move back and forth relative to the induction cooker, and the induction cooker will cycle into the pot-dropping and pot-detecting states. When it is detected that the induction cooker has lost the pot, the induction cooker is controlled to output a preset driving power, so that there is continuous power output to heat the pot. When the pot contacts the stove surface and the induction cooker detects the pot again, the induction cooker is controlled to directly restore to the output power before the pot was dropped, without the need to first detect the pot by pulse pot detection and then soft-start heating. When the pot is continuously flipped for cooking and dropped, there is continuous power output, and when the pot is detected again after being dropped, the induction cooker can restore to the output power before the pot was dropped within 200 to 400 milliseconds, thereby shortening the soft start time. This ensures that the induction cooker continues to heat the pot during the process of flipping the pot for cooking, so that the induction cooker meets the cooking temperature requirements when flipping the pot, thereby realizing the function of flipping the pot for cooking.

[0079] Embodiment 2

[0080] In some alternative embodiments, see Figure 2 , Figure 2 This is a schematic diagram of a process for detecting whether a pot is lost on an induction cooker in one embodiment of the present application.

[0081] like Figure 2 As shown, before the step of detecting that the induction cooker has lost the pot, the induction cooker power control method provided by the present application further includes:

[0082] S1010, obtaining detection information of a pot-free detection device of an induction cooker performing real-time detection on a pot;

[0083] S1020, judging whether the induction cooker has lost the pot based on the detection information.

[0084] During implementation, the system can detect the pot through a no-pot detection device. In some embodiments, pot detection includes but is not limited to current pot detection and phase pot detection. The principle of current pot detection is: during the working process, a minimum working current will be set. When the working current is less than the minimum working current, it is judged that there is no pot.

[0085] Optionally, for the half-bridge induction cooker, phase detection can also be used. The principle is: when there is no pot, the free oscillation time of the coil and the resonant capacitor is long, the energy decay is long, and the time from the drive signal to the coil current reaching zero is relatively long. When there is a pot, due to the addition of the pot load, the energy decays quickly, and the time from the drive signal to the coil current reaching zero is relatively short. The time from the drive signal to the coil crossing the zero point is the phase, and the size of the phase can be used to determine whether there is a pot. When the system detects that the pot is not lost, it returns to execute step S1010.

[0086] In one embodiment of the present application, when it is determined that the induction cooker has lost the pot, the system controls the induction cooker to output a preset driving power output, for example, by controlling the frequency of the IGBT of the induction cooker so that the induction cooker continues to output power when the pot is lost, and at the same time monitors whether the induction cooker detects the pot again. When the induction cooker detects the pot again within a preset time, the frequency of the IGBT of the induction cooker is controlled to be restored to the frequency before the pot was lost, so that the power of the induction cooker is restored to the output power before the pot was lost.

[0087] During implementation, the induction cooker repeats the above steps S1010 to S1300, so that the induction cooker repeats the process of dropping the pot and checking the pot when cooking. When dropping the pot, the induction cooker continues to output power. When checking the pot, it can quickly recover to the output power before dropping the pot within 200 to 400 milliseconds, shortening the soft start time of the IGBT, so as to continuously heat the pot during the cooking process, meet the heat requirement of cooking, and realize the cooking function of cooking.

[0088] Embodiment 3

[0089] In some optional embodiments, such as Figure 1 As shown, after the step of monitoring whether the induction cooker detects the cooker again within the preset time, the method further includes the following steps:

[0090] When the induction cooker does not detect the cooker within the preset time, step S1400 is executed.

[0091] S1400, confirming that the induction cooker is in a completely pot-free state, and controlling the induction cooker to stop working.

[0092] When the pot is removed from the induction cooker for a long time (exceeding the preset time), for example, when the user uses the induction cooker to cook and puts the cooked dishes on a plate, confirm that the induction cooker is in a completely pot-free state. Figure 8 As shown, Figure 8 is a waveform diagram of a completely lost pot in an induction cooker according to an embodiment of the present application. Figure 8 When the induction cooker detects that a pot is lost, the frequency of the IGBT is controlled so that the induction cooker has power output within a preset time. When the preset time is reached and no pot is detected, the induction cooker is turned off.

[0093] Embodiment 4

[0094] In some alternative embodiments, see Figure 3 , Figure 3 This is a schematic diagram of the basic process of adjusting the power of an induction cooker according to another embodiment of the present application.

[0095] like Figure 3 As shown, after the step of controlling the induction cooker to restore the output power to that before the pot is lost, the method further includes the following steps:

[0096] S1500, obtaining the real-time operating power of the induction cooker;

[0097] S1600: When the real-time operating power is greater than a preset power threshold, adjust the operating parameters of the IGBT of the induction cooker until the real-time operating power is less than the power threshold.

[0098] During implementation, the power threshold is stored in the processor. Optionally, the power threshold can be set by the induction cooker manufacturer. During the operation of the induction cooker, the system detects and obtains the real-time operating power of the induction cooker in real time, and compares the real-time operating power with the power threshold. When the real-time operating power is greater than the power threshold, the processor adjusts the working parameters of the IGBT of the induction cooker. Optionally, the working parameters of the IGBT can be specifically set according to the type of induction cooker. For example, the induction cooker includes a single-tube induction cooker and a half-bridge induction cooker. The working parameter can be the pulse width or operating frequency of the IGBT, wherein the single-tube induction cooker can adjust the output power of the induction cooker by adjusting the pulse width, and the half-bridge induction cooker can adjust the output power of the induction cooker by adjusting the IGBT operating frequency.

[0099] In implementation, the induction cooker includes an IGBT driving module, which can adjust the IGBT pulse width or frequency to adjust the output power of the induction cooker, such as reducing the output power of the induction cooker to the power threshold, thereby avoiding the situation where the IGBT is damaged due to excessive working current and reducing accidents.

[0100] Embodiment 5

[0101] In some alternative embodiments, see Figure 4 , Figure 4 This is a basic flow chart of another embodiment of the present application.

[0102] like Figure 4 As shown, when it is detected that the induction cooker has lost the pot, the step of controlling the induction cooker to output a preset driving power includes:

[0103] S1110. When it is detected that the induction cooker has lost the pot, the induction cooker is controlled to stop power output, and when a preset first time threshold is reached, the induction cooker is controlled to output a preset driving power, where the first time threshold is less than the preset time.

[0104] When the system detects that the induction cooker has lost a pot, the system first controls the induction cooker to stop power output. Specifically, the power output can be stopped by turning off the IGBT, which reduces energy consumption while avoiding noise caused by the sudden change in the frequency of the induction cooker. At the same time, the timing is started, and when the timing reaches the first time threshold, the induction cooker is controlled to output a preset driving power. In other embodiments, when the system detects that the induction cooker has lost a pot, the system first controls the induction cooker to stop power output, and starts timing at the same time. When the timing reaches the first time threshold, the driving power of the induction cooker is controlled to gradually decrease with the preset time, so as to meet the requirement of flipping the pot while making the driving consumption smaller and smaller, which can ensure that the IGBT is safer.

[0105] During implementation, the first time threshold is stored in the processor, and the first time threshold is less than the preset time. When the induction cooker detects that the pot is lost, it first turns off the IGBT and starts timing. When the timing reaches the first time threshold, the IGBT is controlled to reduce the frequency to output the preset driving power. The induction cooker does not need to be turned off and maintains LC resonance. The induction cooker continues to output to heat the pot, and the current of the induction cooker does not increase, which will not cause the pipe to explode, thereby protecting the safety of the induction cooker circuit until the timing reaches the preset time. When the induction cooker detects the pot again within the preset time, the system controls the IGBT of the induction cooker to restore to the output power before the pot is lost. During implementation, the induction cooker can restore to the output power before the pot is lost in 200-400 milliseconds, thereby continuously heating the pot during the pot-tumbling process, thereby realizing the pot-tumbling function of the induction cooker. The pot-tumbling waveform of the induction cooker in a single cycle of the induction cooker power control method in this embodiment is as follows: Fig. 9 shown.

[0106] Embodiment 6

[0107] In a second aspect, in some embodiments, an embodiment of the present application further provides an induction cooker power control device, see Figure 5 , Figure 5 It is a schematic diagram of the module structure of an embodiment of the induction cooker power control device of the present application.

[0108] like Figure 5 As shown, the induction cooker power control device provided by the present application includes:

[0109] The first pot-lost preprocessing unit 110 is used to control the induction cooker to output a preset driving power when detecting that the induction cooker has lost a pot;

[0110] The first pot-lost monitoring unit 120 is used to monitor whether the induction cooker detects the pot again within a preset time;

[0111] The first pot detection execution unit 130 is used for controlling the induction cooker to restore the output power to that before the pot is lost when the induction cooker detects the pot again within the preset time.

[0112] The embodiment of the present application detects the pot during the use of the induction cooker. When the user uses the induction cooker to flip the pot to cook, the pot will move back and forth relative to the induction cooker. When the pot-free detection device of the induction cooker detects that the pot is lost, the induction cooker is controlled to output a preset driving power to continuously heat the pot. When the induction cooker detects the pot again, the induction cooker is controlled to directly restore to the output power before the pot is lost. There is no need to first detect the pot by pulse pot detection and then soft-start heating. When the pot is continuously flipped to cook, there is continuous power output, and when the pot returns to its place, the induction cooker can restore to the output power before the pot is lost within 400 milliseconds, thereby shortening the soft start time, thereby ensuring that the induction cooker stably heats the pot, so that the induction cooker meets the cooking temperature requirements when flipping the pot, and realizes the function of flipping the pot to cook.

[0113] In some optional embodiments, the device further comprises:

[0114] A first information acquisition unit is used to acquire detection information of a pot-free detection device of an induction cooker performing real-time detection on a pot;

[0115] The first pot-lost judging unit is used to judge whether the pot is lost in the induction cooker according to the detection information.

[0116] In some optional embodiments, the pot loss pre-processing unit 110 includes:

[0117] The first power adjustment subunit is used to control the induction cooker to output the driving power by adjusting the frequency or pulse width of the IGBT of the induction cooker.

[0118] In some optional embodiments, the pot loss pre-processing unit 110 includes:

[0119] The second power adjustment subunit is used to control the driving power of the induction cooker to gradually decrease over a preset time by adjusting the frequency or pulse width of the IGBT of the induction cooker.

[0120] In some optional embodiments, the induction cooker power control device provided by the present application further includes:

[0121] The first pot-lost processing unit is used to confirm that the induction cooker is in a completely pot-lost state and control the induction cooker to stop working when the induction cooker does not detect the pot within a preset time.

[0122] In some optional embodiments, the induction cooker power control device provided by the present application further includes:

[0123] A first power acquisition unit, used to acquire the real-time operating power of the induction cooker;

[0124] The first parameter adjustment unit is used to adjust the working parameters of the IGBT of the induction cooker when the real-time operating power is greater than a preset power threshold, until the real-time operating power is less than the power threshold.

[0125] In some optional embodiments, the preset time is 200 milliseconds to 2 seconds.

[0126] In some optional embodiments, the preset time is 300 milliseconds to 800 milliseconds.

[0127] In some optional embodiments, the first pot pre-processing unit 110 includes:

[0128] The first pot-lost preprocessing subunit is used to control the induction cooker to stop power output when it is detected that the pot is lost, and to control the induction cooker to output a preset driving power when a preset first time threshold is reached, and the first time threshold is less than the preset time.

[0129] The device provided in the embodiment of the present invention has the same implementation principle and technical effects as those of the aforementioned method embodiment. For the sake of brief description, for matters not mentioned in the device embodiment, reference may be made to the corresponding contents in the aforementioned method embodiment.

[0130] Embodiment 7

[0131] In some optional embodiments, the present application further provides an induction cooker, which includes the induction cooker power control device as described above.

[0132] During implementation, the induction cooker power control device includes a first pot-lost preprocessing unit 110, a first pot-lost monitoring unit 120 and a first pot detection execution unit 130, wherein the first pot-lost preprocessing unit 110 is used to control the induction cooker to output a preset driving power when it is detected that the induction cooker has lost a pot; the first pot-lost monitoring unit 120 is used to monitor whether the induction cooker detects the pot again within a preset time; and the first pot detection execution unit 130 is used to control the induction cooker to restore its output power to that before the pot was lost when the induction cooker detects the pot again within the preset time.

[0133] After the induction cooker starts heating, it will continue to detect whether the pot is lost. In the related art, after the induction cooker detects that the pot is lost, it will turn off the IGBT to stop heating, and then perform pulse pot detection. After the pot is detected, soft start heating is performed. According to the measured data, see Figure 6As shown, it takes 1 second for the induction cooker to go from dropping the pot to the pot detection point, and 3-5 seconds for soft start. As a result, each time the pot is dropped, the induction cooker needs 4-6 seconds to reach the previous power. During the process of flipping the pot to cook, the pot will be flipped over quickly, causing the pot to be dropped, which makes it impossible to cook.

[0134] The induction cooker provided in the present application is provided with a processor system, and the processor system is connected to the first pot-losing preprocessing unit 110, the first pot-losing monitoring unit 120 and the first pot-detecting execution unit 130 to control the working state of the induction cooker. When the system detects that the induction cooker loses the pot, the induction cooker is controlled to output a preset driving power within a preset time. During implementation, for the induction cooker of the half-bridge scheme, the frequency of the IGBT of the induction cooker can be adjusted to be fixed at a certain frequency value or frequency range, thereby controlling the induction cooker to output the driving power. In some embodiments, for the induction cooker of the single-tube resonance scheme, the induction cooker can be controlled to output the driving power by adjusting the conduction pulse width of the IGBT of the induction cooker, for example, the conduction pulse width of the IGBT of the induction cooker is controlled to be fixed at a certain width value or width range, thereby controlling the induction cooker to output the driving power. The driving power can be obtained by the manufacturer through a pot-throwing experiment test, which is not specifically limited here.

[0135] In other embodiments, the frequency or pulse width of the IGBT of the induction cooker can be adjusted to control the driving power of the induction cooker to gradually decrease with the preset time. For example, the frequency of the IGBT of the induction cooker can be controlled to gradually decrease. For example, the preset time is divided into N time nodes. At each time node, the frequency of the IGBT of the induction cooker is controlled to decrease by 10%. While satisfying the pan flipping, the driving consumption is reduced, which can ensure that the IGBT is safer. The driving power can be obtained by the manufacturer through a pan flipping experiment test, and is not specifically limited here.

[0136] In some embodiments, for an induction cooker with a half-bridge solution, taking the constant frequency of the IGBT of the induction cooker as an example, when it is detected that a pot is lost, the frequency of the IGBT is reduced to 80% of the frequency during normal operation. At this time, in other embodiments, for an induction cooker with a single-tube solution, when it is detected that a pot is lost, the pulse width of the IGBT is reduced to 80% of the pulse width during normal operation. The induction cooker does not need to be shut down and maintains LC resonance. The induction cooker outputs driving power within a preset time, and the current of the induction cooker does not increase, which will not cause the tube to explode, thereby protecting the safety of the induction cooker circuit.

[0137] After the system controls the induction cooker to output the preset driving power output, it monitors whether the induction cooker detects the pot again within the preset time. Taking the preset time of 0.8 seconds as an example, when the induction cooker is detected to have lost the pot, the system controls the induction cooker to output the preset driving power output, for example, by controlling the IGBT output of the induction cooker to output the preset driving power output at a certain frequency so that the current does not rise, and then monitors whether the induction cooker detects the pot within 0.8 seconds. Whether the pot is detected can be determined based on the detected current or power. The half-bridge solution can also be determined by detecting the current phase, which is not specifically limited here. If the induction cooker detects the pot within the preset time, the system controls the IGBT of the induction cooker to restore to the output power before the pot is lost. During implementation, the output power before the pot is lost is the output power of the working mode of the induction cooker before the pot is lost. For example, the induction cooker includes but is not limited to stir-frying, hot pot, frying, and steaming. Taking the user using the stir-frying mode to cook as an example, the user flips the pot during the cooking process, and the pot can be detected by the pot-free detection device.

[0138] In the pot-dropping stage, when it is detected that the induction cooker has dropped the pot, the IGBT of the induction cooker is controlled to output a preset driving power to continue heating the pot.

[0139] During the pot detection stage, when the induction cooker detects the pot again within the preset time, the induction cooker is controlled to restore the output power to the stir-fry mode.

[0140] The pan-shaking waveform of the electromagnetic cooker of this application is as follows Figure 7 As shown, when the pot is thrown, the induction cooker controls the IGBT to reduce the frequency so that the induction cooker outputs the preset driving power. At this time, the induction cooker has power output. When the pot returns to its position, the induction cooker detects the pot again. The induction cooker can restore the output power before the pot is thrown within 200-400 milliseconds, thereby continuously heating the pot during the pot-flipping process, thereby realizing the pot-flipping function of the induction cooker.

[0141] In other embodiments, when the induction cooker is detected to have lost a pot, the system may first control the induction cooker to stop power output. Specifically, the power output may be stopped by turning off the IGBT, thereby reducing energy consumption and avoiding noise caused by the sudden change in the frequency of the induction cooker. At the same time, the timing is started, and when the timing reaches the first time threshold, the induction cooker is controlled to output a preset driving power. The waveform of the induction cooker is as follows: Fig. 9 shown.

[0142] In other embodiments, when it is detected that the induction cooker has lost the pot, the system first controls the induction cooker to stop power output and starts timing at the same time. When the timing reaches a first time threshold, the driving power of the induction cooker is controlled to gradually decrease with the preset time, which satisfies the need to toss the pot while making the driving power consumption smaller and smaller, thereby ensuring that the IGBT is safer.

[0143] During implementation, the first time threshold is stored in the processor, and the first time threshold is less than the preset time. When the induction cooker detects that the pot is lost, it first turns off the IGBT and starts timing. When the timing reaches the first time threshold, the IGBT is controlled to reduce the frequency to output the preset driving power. The induction cooker does not need to be turned off and maintains LC resonance. The induction cooker continues to output to heat the pot, and the current of the induction cooker does not increase, which will not cause the pipe to explode, thereby protecting the safety of the induction cooker circuit until the timing reaches the preset time. When the induction cooker detects the pot again within the preset time, the induction cooker is controlled to restore the output power before the pot is lost. During implementation, the induction cooker can restore the output power before the pot is lost in 200-400 milliseconds, thereby continuously heating the pot during the pot-tumbling process, thereby realizing the pot-tumbling function of the induction cooker. The pot-tumbling waveform of the induction cooker in a single cycle of the induction cooker power control method in this embodiment is as follows. Fig. 9 shown.

[0144] The first time threshold and the preset time can be set according to the frequency of the user flipping the pot. For example, after testing, the induction cooker manufacturer sets the preset time to 200 milliseconds to 2 seconds. Preferably, the preset time is 300 milliseconds to 800 milliseconds. The preset time can be entered before the device leaves the factory or when it is installed. It should be noted that the above-mentioned preset time value and preset driving power are only an example, not a limitation of this application. On the contrary, in other embodiments of the present invention, adaptive adjustments can be made according to different usage environments and requirements, so that when the induction cooker throws the pot, there is power output to heat the pot without exploding the tube.

[0145] The embodiment of the present application detects the pot during the use of the induction cooker. When the user uses the induction cooker to flip the pot for cooking, the pot will move back and forth relative to the induction cooker. When the pot-free detection device of the induction cooker detects that the pot is lost, the induction cooker is controlled to have power output within a preset time to continue heating the pot. When the pot falls back and contacts the stove surface so that the induction cooker detects the pot again, the induction cooker is controlled to restore the output power to that before the pot is lost. There is no need to first detect the pot by pulse pot detection and then soft-start heating. When the pot is continuously flipped for cooking, power output continues when the pot is lost, and when the pot is detected again, the induction cooker can restore the output power to that before the pot is lost within 400 milliseconds, thereby shortening the soft start time, thereby ensuring that the induction cooker heats the pot stably, so that the induction cooker meets the cooking temperature requirement when flipping the pot, and the function of flipping the pot for cooking is realized.

[0146] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for controlling power of an induction cooker, characterized in that: The method comprises: When the induction cooker is detected to have lost the pot based on current pot detection or phase pot detection, the induction cooker is controlled to output a preset driving power; Based on the current pot detection or the phase pot detection, monitoring whether the induction cooker detects the pot again within a preset time; When the induction cooker detects the pot again based on the current pot detection or the phase pot detection within the preset time, controlling the induction cooker to restore the output power to that before the pot was lost; The step of controlling the induction cooker to output a preset driving power when the induction cooker is detected to have lost a pot comprises: When it is detected that the induction cooker has lost the pot, the induction cooker is controlled to stop power output, and when a preset first time threshold is reached, the induction cooker is controlled to output a preset driving power, where the first time threshold is less than the preset time.

2. The induction cooker power control method according to claim 1, characterized in that: Before the step of detecting that the induction cooker has lost a pot, the method further includes: Acquire detection information of a pot-less detection device of an induction cooker for real-time detection of pots; It is determined whether the induction cooker has lost the pot according to the detection information.

3. The induction cooker power control method according to claim 1, characterized in that: The method of controlling the induction cooker to output a preset driving power comprises: By adjusting the frequency or pulse width of the IGBT of the induction cooker, the induction cooker is controlled to output the driving power.

4. The induction cooker power control method according to claim 1, characterized in that: The method of controlling the induction cooker to output a preset driving power comprises: By adjusting the frequency or pulse width of the IGBT of the induction cooker, the driving power of the induction cooker is controlled to gradually decrease over a preset time.

5. The induction cooker power control method according to claim 1, characterized in that: After the step of monitoring whether the induction cooker detects the cooker again within a preset time, the method further includes: When the induction cooker fails to detect the pot within the preset time, it is confirmed that the induction cooker is in a completely pot-lost state, and the induction cooker is controlled to stop working.

6. The induction cooker power control method according to claim 1, characterized in that: After the step of controlling the induction cooker to restore the output power to that before the pot is lost, the method further comprises the following steps: Get the real-time operating power of the induction cooker; When the real-time operating power is greater than a preset power threshold, the operating parameters of the IGBT of the induction cooker are adjusted until the real-time operating power is less than the power threshold.

7. The induction cooker power control method according to any one of claims 1 to 6, characterized in that: The preset time is 200 milliseconds to 2 seconds.

8. The induction cooker power control method according to claim 7, characterized in that: The preset time is 300 milliseconds to 800 milliseconds.

9. An induction cooker power control device, characterized in that: The device comprises: A first pot-lost preprocessing unit is used to control the induction cooker to output a preset driving power when the induction cooker detects that the pot is lost based on current pot detection or phase pot detection; A first pot-lost monitoring unit, configured to monitor whether the induction cooker detects the pot again within a preset time based on the current pot detection or the phase pot detection; A first pot detection execution unit is used to control the induction cooker to restore the output power before the pot is lost when the induction cooker detects the pot again based on the current pot detection or the phase pot detection within the preset time; The first pot-lost preprocessing subunit is used to control the induction cooker to stop power output when it is detected that the pot is lost, and to control the induction cooker to output a preset driving power when a preset first time threshold is reached, and the first time threshold is less than the preset time.

10. The induction cooker power control device according to claim 9, characterized in that: The device also includes: A first information acquisition unit is used to acquire detection information of a pot-free detection device of an induction cooker performing real-time detection on a pot; The first pot-lost judging unit is used to judge whether the pot is lost in the induction cooker according to the detection information.

11. The induction cooker power control device according to claim 9, characterized in that: The lost pot pretreatment unit comprises: The first power adjustment subunit is used to control the induction cooker to output the driving power by adjusting the frequency or pulse width of the IGBT of the induction cooker.

12. The induction cooker power control device according to claim 9, characterized in that: The lost pot pretreatment unit comprises: The second power adjustment subunit is used to control the driving power of the induction cooker to gradually decrease over a preset time by adjusting the frequency or pulse width of the IGBT of the induction cooker.

13. The induction cooker power control device according to claim 9, characterized in that: The device also includes: The first pot-lost processing unit is used for confirming that the induction cooker is in a completely pot-lost state and controlling the induction cooker to stop working when the induction cooker fails to detect the pot within the preset time.

14. The induction cooker power control device according to claim 9, characterized in that: The device also includes: A first power acquisition unit, used to acquire the real-time operating power of the induction cooker; The first parameter adjustment unit is used to adjust the working parameters of the IGBT of the induction cooker when the real-time operating power is greater than a preset power threshold, until the real-time operating power is less than the power threshold.

15. The induction cooker power control device according to any one of claims 9 to 14, characterized in that: The preset time is 200 milliseconds to 2 seconds.

16. The induction cooker power control device according to claim 15, characterized in that: The preset time is 300 milliseconds to 800 milliseconds.

17. An induction cooker, characterized in that: The induction cooker comprises the induction cooker power control device according to any one of claims 9 to 16.

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