Heating circuit of cooking equipment, control method of heating circuit and cooking equipment

Abstract

The invention provides a heating circuit of cooking equipment, a control method of the heating circuit and the cooking equipment. The heating circuit at least comprises a first coil, a second coil, a first switch piece and a second switch piece, the first coil is arranged at the bottom of a cooker body of the cooking equipment, the second coil is arranged on the side portion of the cooker body, and the first switch piece is used for controlling on-off of the first coil and a power circuit of the cooking equipment. The second switch piece is used for controlling on-off of the second coil and the power circuit; the conduction starting time of the first coil is separated from the conduction starting time of the second coil; in the high-frequency heating mode, the first switch piece and the second switch piece control the first coil and the second coil at a first preset on-off frequency, in the low-frequency heating mode, the first switch piece and the second switch piece control the first coil and the second coil at a second preset on-off frequency, and the first preset on-off frequency is larger than the second preset on-off frequency. The heating circuit provided by the invention can improve the problem of non-uniform heat in the cooking process of the cooking equipment.

Description

Technical Field

[0001] The present application relates to the technical field of household appliances, and particularly to a heating circuit of a cooking device, a control method for the heating circuit of the cooking device, and a cooking device. Background Art

[0002] At present, in the cooking process of electromagnetic heating cooking devices on the market, the food is unevenly heated. For example, when the cooking device is a rice cooker, the heat distribution in the pot body of the rice cooker is uneven, resulting in uneven heating of the rice and preventing the rice from achieving the best cooking effect.

[0003] With the improvement of consumers' quality of life, the quality requirements for the cooked food of cooking devices are getting higher and higher. It is necessary to improve the control scheme of existing electromagnetic heating cooking devices so that the heat during the cooking process of the cooking device is evenly controllable, thereby improving the user experience. Summary of the Invention

[0004] The present application provides a heating circuit of a cooking device, a control method for the heating circuit of the cooking device, and a cooking device to improve the technical problem of uneven heat distribution during the cooking process of the cooking device.

[0005] To solve the above technical problem, the present application provides a heating circuit of a cooking device. The heating circuit at least includes a first coil, a second coil, a first switch member, and a second switch member. Among them, the first coil is arranged at the bottom of the pot body of the cooking device, the second coil is arranged at the side of the pot body, the first switch member is used to control the on-off of the first coil and the power supply circuit of the cooking device, and the second switch member is used to control the on-off of the second coil and the power supply circuit; wherein, there is an interval between the start conduction time of the first coil and the start conduction time of the second coil; wherein, in the high-frequency heating mode, the first switch member and the second switch member control the first coil and the second coil at a first preset on-off frequency, and in the low-frequency heating mode, the first switch member and the second switch member control the first coil and the second coil at a second preset on-off frequency, and the first preset on-off frequency is greater than the second preset on-off frequency.

[0006] Among them, in the water absorption stage and / or the temperature rising stage of the cooking device, the first switch member controls the on-off of the first coil and the power supply circuit at the first preset on-off frequency, and the second switch member controls the on-off of the second coil and the power supply circuit at the first preset on-off frequency, so that the heating circuit works in the high-frequency heating mode.

[0007] Among them, in the boiling stage of the cooking device, the first switch member controls the on-off of the first coil and the power supply circuit at the second preset on-off frequency, and the second switch member controls the on-off of the second coil and the power supply circuit at the second preset on-off frequency, so that the heating circuit works in the low-frequency heating mode.

[0008] The heating circuit further includes a third coil and a third switch. The third coil is at least partially disposed on the side of the cooking pot body and is spaced apart from the second coil. The third switch is used to connect the first coil or the third coil to the first switch. When the third switch connects the third coil to the first switch, the first switch is further used to control the on / off of the third coil and the power supply circuit at a third preset on / off frequency.

[0009] The heating circuit further includes a fourth coil and a fourth switch. The fourth coil is disposed on the top of the cooking device. The fourth switch is used to connect the second coil or the fourth coil to the second switch. When the fourth switch connects the fourth coil to the second switch, the second switch is further used to control the on / off of the fourth coil and the power supply circuit at a fourth preset on / off frequency.

[0010] The heating circuit further includes a control circuit, which is electrically connected to the first switch, the second switch, the third switch, and the fourth switch respectively. The control circuit is used to send control signals to the first switch and the second switch to control the on / off of the first switch and the second switch. The control circuit is further used to control the third switch to connect the first coil or the third coil to the first switch. The control circuit is further used to control the fourth switch to connect the second coil or the fourth coil to the second switch.

[0011] The control circuit receives a heating instruction, where the heating instruction includes bottom heating, side heating, and top heating. In response to the heating instruction being bottom heating, the control circuit controls the third switch to connect the first coil, controls the fourth switch to connect the second coil, and sends control signals to the first switch and the second switch to control the on / off of the first switch and the second switch, so that the first coil and the second coil perform bottom heating. In response to the heating instruction being side heating, the control circuit controls the third switch to connect the third coil and sends a control signal to the first switch to control the on / off of the first switch, so that the third coil performs side heating. In response to the heating instruction being top heating, the control circuit controls the fourth switch to connect the fourth coil and sends a control signal to the second switch to control the on / off of the second switch, so that the fourth coil performs side heating.

[0012] The control signal includes a high-frequency signal and a low-frequency signal. In response to the heating instruction being bottom heating, the control circuit sends a high-frequency signal to the first switch and the second switch, so that the first switch controls the on / off of the first coil and the power supply circuit at a first preset on / off frequency, and the second switch controls the on / off of the second coil and the power supply circuit at a first preset on / off frequency; or the controller sends a low-frequency signal to the first switch and the second switch, so that the first switch controls the on / off of the first coil and the power supply circuit at a second preset on / off frequency, and the second switch controls the on / off of the second coil and the power supply circuit at a second preset on / off frequency.

[0013] Among them, the first switching element includes a first power switch, the second switching element includes a second power switch, the control signal includes a pulse modulation signal; the third switching element includes a third selection switch, and the fourth switching element includes a fourth selection switch.

[0014] The present application provides a control method for a heating circuit of a cooking device, which is used for the above-mentioned heating circuit. The control method includes receiving a heating mode, and the heating mode includes a high-frequency heating mode or a low-frequency heating mode; in response to the heating mode being the high-frequency heating mode, controlling the first switching element and the second switching element to connect the first coil and the second coil to the power supply circuit at a first preset on-off frequency; in response to the heating mode being the low-frequency heating mode, controlling the first switching element and the second switching element to connect the first coil and the second coil to the power supply circuit at a second preset on-off frequency; wherein, there is a time interval between the conduction start time of the first coil and the conduction start time of the second coil, and the first preset on-off frequency is greater than the second preset on-off frequency.

[0015] Among them, the control method includes, in response to the cooking device entering the water absorption stage and / or the temperature rising stage, controlling the heating circuit to operate in the high-frequency heating mode.

[0016] Among them, the control method includes, in response to the cooking device entering the boiling stage, controlling the heating circuit to operate in the low-frequency heating mode.

[0017] Among them, the heating circuit further includes a third coil provided on the side of the cooking pot and spaced from the second coil, a third switching element for connecting the first coil or the third coil to the first switching element, a fourth coil provided on the top of the cooking device, and a fourth switching element for connecting the second coil or the fourth coil to the second switching element. The heating mode further includes side heating and top heating. The control method further includes, in response to the heating mode being side heating, controlling the third switching element to connect the third coil to the first switching element, and controlling the first switching element to connect the third coil to the power supply circuit at a third preset on-off frequency; in response to the heating mode being top heating, controlling the fourth switching element to connect the fourth coil to the second switching element, and controlling the second switching element to connect the fourth coil to the power supply circuit at a fourth preset on-off frequency.

[0018] The present application provides a cooking device, which includes the above-mentioned heating circuit.

[0019] The beneficial effects of the present application are as follows: The heating circuit of the cooking device of the present application at least includes a first coil, a second coil, a first switch member, and a second switch member. Among them, the first coil is disposed at the bottom of the cooking pot body of the cooking device, the second coil is disposed at the side of the pot body, the first switch member is used to control the on-off of the first coil and the power supply circuit of the cooking device, and the second switch member is used to control the on-off of the second coil and the power supply circuit; wherein, there is a time interval between the start time of conduction of the first coil and the start time of conduction of the second coil; wherein, in the high-frequency heating mode, the first switch member and the second switch member control the first coil and the second coil at a first preset on-off frequency, and in the low-frequency heating mode, the first switch member and the second switch member control the first coil and the second coil at a second preset on-off frequency, and the first preset on-off frequency is greater than the second preset on-off frequency. Through the above method, the heating circuit of the present application can operate in the high-frequency mode or the low-frequency mode. In the high-frequency mode, the first coil and the second coil can uniformly heat the pot body, so that the heat distribution on the pot body is uniform, thereby improving the cooking quality of the cooking device and further improving the user experience; in the low-frequency heating mode, the alternating heating of the first coil and the second coil enables the food in the pot to roll, achieving non-stick of the food, thereby improving the cooking quality of the cooking device and further improving the user experience. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings, where:

[0021] Figure 1 It is a schematic structural diagram of an embodiment of the heating circuit of the cooking device provided by the present application;

[0022] Figure 2 It is a schematic structural diagram of an embodiment of the heating coil disposed in the cooking device provided by the present application;

[0023] Figure 3 It is a schematic diagram of an embodiment of the first preset on-off frequency and the second preset on-off frequency provided by the present application;

[0024] Figure 4 It is a schematic diagram of the rice rolling effect during the cooking process of the cooking pot body of the cooking device;

[0025] Figure 5 It is a schematic flowchart of an embodiment of the control method of the heating circuit of the cooking device provided by the present application;

[0026] Figure 6It is a schematic flowchart of another embodiment of the control method for the heating circuit of the cooking device provided by this application;

[0027] Figure 7 It is a schematic flowchart of yet another embodiment of the control method for the heating circuit of the cooking device provided by this application;

[0028] Figure 8 It is a schematic structural diagram of an embodiment of the cooking device provided by this application. Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of this application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0030] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of this application, then such directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If this specific posture changes, then the directional indications will also change accordingly.

[0031] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of this application, then such descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by this application.

[0032] This application provides a heating circuit for a cooking device. Refer to Figures 1 to 2 , Figure 1 It is a schematic structural diagram of an embodiment of the heating circuit of the cooking device provided by this application, Figure 2 It is a schematic structural diagram of the heating coil provided by this application disposed in the cooking device, as Figure 1 and Figure 2As shown, the heating circuit 10 at least includes a first coil L1, a second coil L2, a first switch SW1 and a second switch SW2. Among them, the first coil L1 is arranged at the bottom of the pot body of the cooking device, and the second coil L2 is arranged at the side of the pot body. Specifically, the pot body includes a pot and a base, the base is provided with a cooking cavity, and the pot is arranged in the cooking cavity. Among them, the first coil L1 is arranged at the bottom of the pot and on the base, and the second coil L2 is arranged at the side of the pot and on the base. The first switch SW1 is used to control the on-off of the first coil L1 and the power supply circuit of the cooking device, and the second switch SW2 is used to control the on-off of the second coil L2 and the power supply circuit; among them, the conduction start time of the first coil L1 is different from that of the second coil L2; among them, in the high-frequency heating mode, the first switch SW1 and the second switch SW2 control the first coil L1 and the second coil L2 at a first preset on-off frequency, and in the low-frequency heating mode, the first switch SW1 and the second switch SW2 control the first coil L1 and the second coil L2 at a second preset on-off frequency, and the first preset on-off frequency is greater than the second preset on-off frequency.

[0033] It can be known that the heating circuit 10 further includes a first capacitor C1 and a second capacitor C2 for resonating with the first coil L1 and the second coil L2. One end of the first coil L1 of this embodiment is respectively connected to one end of the first capacitor C1 and the first end of the first switch SW1, the other end of the first coil L1 is respectively connected to the other end of the first capacitor C1 and the power supply circuit, the second end of the first switch SW1 is connected to the power supply circuit, and the control end of the first switch SW1 is connected to the control end of the cooking device. One end of the second coil L2 is respectively connected to one end of the second capacitor C2 and the first end of the second switch SW2, the other end of the second coil L2 is respectively connected to the other end of the second capacitor C2 and the power supply circuit, the second end of the second switch SW2 is connected to the power supply circuit, and the control end of the second switch SW2 is connected to the control end of the cooking device.

[0034] Referring to Figure 3 and Figure 4 , Figure 3 is a schematic diagram of an embodiment of the first preset on-off frequency and the second preset on-off frequency provided by this application; Figure 4 is a schematic diagram of the rice tumbling effect during cooking of the pot body of the cooking device, as shown in Figure 3 and Figure 4As shown, T1 corresponds to the first preset on-off frequency, and T2 corresponds to the second preset on-off frequency. When the heating circuit 10 of this embodiment is working, in the high-frequency heating mode, the first switch SW1 and the second switch SW2 control the first coil L1 and the second coil L2 to access the power circuit at the first preset on-off frequency, and the conduction start time of the first coil L1 and the conduction start time interval of the second coil L2, then the first coil L1 and the second coil L2 work alternately, wherein the first coil L1 and the second coil L2 can also work simultaneously for a short time (ms level), that is, they are simultaneously connected to the power circuit. In the high-frequency heating mode, when the first coil L1 and the second coil L2 are heated alternately, the heat of the pot body portion corresponding to the coil that stops heating cannot be dissipated in a short time, and the heat at this position is equivalent to the heat of the pot body portion corresponding to the heated coil. Therefore, in the high-frequency heating mode, the first coil L1 and the second coil L2 can heat the pot body evenly, so that the heat on the pot body is evenly distributed, thereby improving the cooking quality of the cooking device, and further improving the user experience.

[0035] In the low-frequency heating mode, the first switch SW1 and the second switch SW2 control the first coil L1 and the second coil L2 at a second preset on-off frequency, wherein the first preset on-off frequency is greater than the second preset on-off frequency. In the low-frequency heating mode, when the first coil L1 and the second coil L2 are heated alternately, the time interval between the coil that stops heating and the coil that is being heated is greater than the time interval in the high-frequency mode, and the heat of the pot body portion corresponding to the coil that stops heating is less than the heat of the pot body portion corresponding to the coil that is being heated. Therefore, in the low-frequency heating mode, the alternating heating of the first coil L1 and the second coil L2 enables the food in the pot to roll. For example, when the cooking device is in the heating stage, the heating circuit 10 operates in the low-frequency mode, which can achieve the rolling of the food and prevent the food from sticking to the pot, improve the cooking quality of the cooking device, and further improve the user experience.

[0036] The heating circuit 10 of the cooking device of the present application at least includes a first coil L1, a second coil L2, a first switch SW1 and a second switch SW2. Among them, the first coil L1 is arranged at the bottom of the cooking pot body of the cooking device, the second coil L2 is arranged at the side of the pot body, the first switch SW1 is used to control the on-off of the first coil L1 and the power supply circuit of the cooking device, and the second switch SW2 is used to control the on-off of the second coil L2 and the power supply circuit; among them, the conduction start time of the first coil L1 is spaced from the conduction start time of the second coil L2; among them, in the high-frequency heating mode, the first switch SW1 and the second switch SW2 control the first coil L1 and the second coil L2 at a first preset on-off frequency, and in the low-frequency heating mode, the first switch SW1 and the second switch SW2 control the first coil L1 and the second coil L2 at a second preset on-off frequency, and the first preset on-off frequency is greater than the second preset on-off frequency. By the above method, the heating circuit 10 of the present application can work in the high-frequency mode or the low-frequency mode. In the high-frequency mode, the first coil L1 and the second coil L2 can uniformly heat the pot body, so that the heat distribution on the pot body is uniform, thereby improving the cooking quality of the cooking device and further improving the user experience; in the low-frequency heating mode, the alternating heating of the first coil L1 and the second coil L2 enables the food in the pot to roll, and can prevent the food from sticking to the pot, thereby improving the cooking quality of the cooking device and further improving the user experience.

[0037] Optionally, in the water absorption stage and / or the temperature rise stage of the cooking device, the first switch SW1 controls the on-off of the first coil L1 and the power supply circuit at the first preset on-off frequency, and the second switch SW2 controls the on-off of the second coil L2 and the power supply circuit at the first preset on-off frequency, so that the heating circuit 10 works in the high-frequency heating mode. It can be understood that in this embodiment, in the water absorption stage and / or the temperature rise stage of the cooking device, the first switch SW1 and the second switch SW2 control the on-off of the first coil L1 and the second coil L2 and the power supply circuit at the first preset on-off frequency, so that the heating circuit 10 works in the high-frequency heating mode. At this time, the heat of the pot body position corresponding to the coil that stops heating and the heating coil is quite the same, and the pot body can be uniformly heated, so that the heat distribution on the pot body is uniform. In addition, the time interval between the switching of the first coil L1 and the second coil L2 is short, so the output power of the first coil L1 and the second coil L2 is large, and the temperature rise speed of the cooking device in the temperature rise stage can be accelerated.

[0038] In this embodiment, during the water absorption stage and / or the heating up stage of the cooking device, the first switch SW1 controls the on / off of the first coil L1 and the power supply circuit at a first preset on / off frequency, and the second switch SW2 controls the on / off of the second coil L2 and the power supply circuit at the first preset on / off frequency, so that the heating circuit 10 operates in a high-frequency heating mode. In this way, during the heating up stage of the cooking device, the heating circuit 10 operates in a high-frequency mode, which can uniformly heat the pot body, making the heat distribution on the pot body uniform; further, since the time interval for switching between the first coil L1 and the second coil L2 is short, the output powers of the first coil L1 and the second coil L2 are large, which can accelerate the heating up speed of the cooking device during the heating up stage.

[0039] Optionally, during the boiling stage of the cooking device, the first switch SW1 controls the on / off of the first coil L1 and the power supply circuit at a second preset on / off frequency, and the second switch SW2 controls the on / off of the second coil L2 and the power supply circuit at the second preset on / off frequency, so that the heating circuit 10 operates in a low-frequency heating mode. Existing cooking devices are equipped with a rice soup collection function. When the user needs low-sugar rice or nutritious rice soup, during the boiling stage of the cooking device, at this time, the food in the pot body is in a boiling state, and the heating circuit 10 operates in a low-frequency mode. The first coil L1 and the second coil L2 alternately heat the pot body, making the food in the pot body achieve a tumbling effect, so that the boiling effect of the food in the pot body is more obvious, and more rice soup is discharged, facilitating the collection of rice soup. Herein, the boiling stage of this embodiment refers to the stage when the food in the cooking device is in a boiling state.

[0040] In this embodiment, during the boiling stage of the cooking device, the first switch SW1 controls the on / off of the first coil L1 and the power supply circuit at a second preset on / off frequency, and the second switch SW2 controls the on / off of the second coil L2 and the power supply circuit at the second preset on / off frequency, so that the heating circuit 10 operates in a low-frequency heating mode. In this way, during the boiling stage of the cooking device, the heating circuit 10 operates in a low-frequency heating mode, which can enhance the boiling effect of the food in the pot body of the cooking device. When the user has a need for low-sugar rice or rice soup, it can better collect the rice soup and meet the user's needs.

[0041] In other embodiments, during the heating up stage of the cooking device, the first switch SW1 controls the on / off of the first coil L1 and the power supply circuit at a second preset on / off frequency, and the second switch SW2 controls the on / off of the second coil L2 and the power supply circuit at the second preset on / off frequency, so that the heating circuit 10 operates in a low-frequency heating mode. At this time, the food in the pot body has a micro-boiling effect, which can prevent the food from sticking to the pot.

[0042] In one embodiment, when the cooking device cooks rice, it usually has multiple stages, specifically including a water absorption stage, a heating-up stage, a boiling stage, a rice simmering stage, and a heat preservation stage. Among them, when starting to cook rice, rice and water are put into the cooking device in a certain proportion. In the water absorption stage, the cooking device heats up and soaks the rice, enabling the rice to absorb water. After absorbing water for a period of time, the cooking device enters the heating-up stage, and the rice-water mixture quickly heats up until the cooking device heats up to the boiling threshold temperature. Then the cooking device enters the boiling stage and maintains this boiling stage for a period of time. After that, the cooking device enters the rice simmering stage and lasts for a period of time, and finally enters the heat preservation stage.

[0043] Based on different cooking effect requirements, at least optionally, the heating circuit 10 can work in the high-frequency working mode in any one of the cooking stages of the water absorption stage, the heating-up stage, and the boiling stage, which can evenly heat the cooking pot body and make the heat distribution on the cooking pot body uniform. For example, the heating circuit 10 works in the high-frequency working mode in the water absorption stage and / or in the boiling stage.

[0044] Optionally, the heating circuit 10 further includes a third coil L3 and a third switch K1. At least a part of the third coil L3 is arranged on the side of the cooking pot body and is spaced from the second coil L2. The third switch K1 is used to connect the first coil L1 or the third coil L3 to the first switch SW1. When the third switch K1 connects the third coil L3 to the first switch SW1, the first switch SW1 is further used to control the on / off of the third coil L3 and the power supply circuit at a third preset on / off frequency. Among them, the third preset on / off frequency can be equal to the first preset on / off frequency or equal to the second preset on / off frequency. Specifically, one end of the third switch K1 is respectively connected to one end of the third coil L3 and one end of the first coil L1. The other ends of the first coil L1 and the third coil L3 are respectively connected to the power supply circuit. The other end of the third switch K1 is respectively connected to one end of the first capacitor C1 and the first end of the first switch SW1. The other end of the first capacitor C1 is connected to the power supply circuit. The control end of the first switch SW1 is connected to the control end of the cooking device, and the second end of the first switch SW1 is connected to the power supply circuit.

[0045] Understandably, the first coil L1 and the third coil L3 are arranged at different positions of the cooking pot body. Then, by controlling the heating coil to which the third switch K1 is connected, heating at different positions of the cooking pot body can be achieved. For example, when the cooking device needs to heat the side of the cooking pot body, the third switch K1 connects the third coil L3 to the first switch SW1. Thus, the first switch SW1 controls the third coil L3 at a first preset on-off frequency. At this time, the second coil L2 and the third coil L3 can alternately heat the side of the cooking pot body, or the third coil L3 independently heats the side of the cooking pot body. In addition to operating in the high-frequency heating mode or the low-frequency heating mode, the heating circuit 10 of this embodiment can, according to cooking requirements, independently heat different parts of the cooking pot body with the first coil L1, the second coil L2, or the third coil L3, or the third coil L3 and the second coil L2 alternately heat the cooking pot body, or control the third switch K1 to switch and connect the first coil L1 and the third coil L3 to the first switch SW1 at a certain switching frequency, so that the first coil L1 and the third coil L3 alternately heat different positions of the cooking pot body.

[0046] The heating circuit 10 of this embodiment further includes a third switch K1 and a third coil L3 arranged at the side of the cooking pot body and spaced from the second coil L2. According to cooking needs, the first coil L1 or the third coil L3 can be connected to the first switch SW1 through the third switch K1, so that the first coil L1 heats the bottom of the cooking pot body or the third coil L3 heats the side of the cooking pot body to meet different cooking requirements, thereby improving the cooking quality of the cooking device.

[0047] In other embodiments, the third coil L3 can also be connected to the power supply circuit by the first switch SW1 at other on-off frequencies to meet the heating power requirements.

[0048] Optionally, the heating circuit 10 of this embodiment further includes a fourth coil L4 and a fourth switch K2. The fourth coil L4 is arranged at the top of the cooking device. The fourth switch K2 is used to connect the second coil L2 or the fourth coil L4 to the second switch SW2. When the fourth switch K2 connects the fourth coil L4 to the second switch SW2, the second switch SW2 is further used to control the on-off of the fourth coil L4 and the power supply circuit at a fourth preset on-off frequency. Among them, the fourth preset on-off frequency can be the same as or different from the first preset on-off frequency, the second preset on-off frequency, and the third preset on-off frequency. Specifically, one end of the fourth switch K2 is respectively connected to one end of the second coil L2 and one end of the fourth coil L4. The other ends of the second coil L2 and the fourth coil L4 are respectively connected to the power supply circuit; the other end of the fourth switch K2 is respectively connected to one end of the second capacitor C2 and the first end of the second switch SW2. The other end of the second capacitor C2 is connected to the power supply circuit; the control end of the second switch SW2 is connected to the control end of the cooking device, and the second end of the second switch SW2 is connected to the power supply circuit.

[0049] Understandably, the second coil L2 and the fourth coil L4 are arranged at different positions of the cooking pot body. Then, by controlling the heating coil to which the fourth switch K2 is connected, heating of different positions of the cooking pot body can be achieved. For example, when the cooking device needs to heat the side of the cooking pot body, the fourth switch K2 connects the second coil L2 to the second switch SW2. Thus, the second switch SW2 controls the second coil L2 at the first preset on-off frequency or the second preset on-off frequency. At this time, the second coil L2 and the third coil L3 can alternately heat the side of the cooking pot body, or the second coil L2 independently heats the side of the cooking pot body. When the cooking device needs to heat the top of the cooking device, the fourth switch K2 connects the fourth coil L4 to the second switch SW2. Thus, the second switch SW2 controls the fourth coil L4 to heat the top of the cooking device at the first preset on-off frequency, the second preset on-off frequency or other on-off frequencies.

[0050] The heating circuit 10 of this embodiment further includes a fourth switch K2 and a fourth coil L4 arranged at the top of the cooking device, so as to connect the second coil L2 or the fourth coil L4 to the second switch SW2 through the fourth switch K2, that is, control the second coil L2 or the fourth coil L4 for the fourth switch K2 to switch work, so that the cooking device controls the second coil L2 or the fourth coil L4 to heat different positions of the cooking device according to cooking requirements, so as to meet different cooking requirements of the cooking device.

[0051] Optionally, the heating circuit 10 further includes a control circuit (not marked in the figure), and the control circuit is electrically connected to the first switch SW1, the second switch SW2, the third switch K1 and the fourth switch K2 respectively. Specifically, the control circuit is respectively connected to the control terminals of the first switch SW1, the second switch SW2, the third switch K1 and the fourth switch K2. The control circuit sends control signals to the first switch SW1 and the second switch SW2 to control the on-off of the first switch SW1 and the second switch SW2. The control circuit is further used to control the third switch K1 to connect the first coil L1 or the third coil L3 to the first switch SW1, and the control circuit is further used to control the fourth switch K2 to connect the second coil L2 or the fourth coil L4 to the second switch SW2.

[0052] Understandably, the heating circuit 10 of this embodiment further includes a control circuit, and the control circuit can control the third switch K1 and the fourth switch K2 to access the coil that needs to generate heat; the control circuit sends control signals to the first switch SW1 and the second switch SW2 to control the first switch SW1 and the second switch SW2 to turn on and off at the first preset frequency or the second preset frequency to control the first coil L1, the second coil L2, the third coil L3 or the fourth coil L4 to access the power supply circuit.

[0053] The heating circuit 10 of this embodiment further includes a control circuit. The control circuit is electrically connected to the first switching element SW1, the second switching element SW2, the third switching element K1, and the fourth switching element K2 respectively. The control circuit is configured to send control signals to the first switching element SW1 and the second switching element SW2 to control the on / off states of the first switching element SW1 and the second switching element SW2. The control circuit is further configured to control the third switching element K1 to connect the first coil L1 or the third coil L3 to the first switching element SW1, and the control circuit is further configured to control the fourth switching element K2 to connect the second coil L2 or the fourth coil L4 to the second switching element SW2. In this way, the control circuit can control the third switching element K1 and the fourth switching element K2 to switch the heating coils, and control the first switching element SW1 and the second switching element SW2 to control the working mode or output power of the heating coils, so as to meet different cooking requirements of the cooking device.

[0054] Optionally, the first switching element SW1 includes a first power switch, the second switching element SW2 includes a second power switch, the control signal includes a pulse modulation signal; the third switching element K1 includes a third selection switch, and the fourth switching element K2 includes a fourth selection switch.

[0055] In other embodiments, the third switching element K1 and the fourth switching element K2 can be mechanical switches. The third coil L3 and the fourth coil L4 can be used as backup heating coils. When other coils fail, the user can manually switch the third switching element K1 and the fourth switching element K2 to replace the faulty heating coil, so that the cooking device can be used normally.

[0056] In an embodiment of the heating circuit 10, the control circuit receives a heating instruction. The heating instruction includes heating the bottom of the pot body, heating the side of the pot body, and heating the top of the cooking device. In response to the heating instruction for heating the bottom of the pot body, the control circuit controls the third switching element K1 to connect the first coil L1, controls the fourth switching element K2 to connect the second coil L2, and sends control signals to the first switching element SW1 and the second switching element SW2 to control the on / off states of the first switching element SW1 and the second switching element SW2, so that the first coil L1 and the second coil L2 heat the bottom. In response to the heating instruction for heating the side of the pot body, the control circuit controls the third switching element K1 to connect the third coil L3, and sends a control signal to the first switching element SW1 to control the on / off state of the first switching element SW1, so that the third coil L3 heats the side. In response to the heating instruction for heating the top of the cooking device, the control circuit controls the fourth switching element K2 to connect the fourth coil L4, and sends a control signal to the second switching element SW2 to control the on / off state of the second switching element SW2, so that the fourth coil L4 heats the side.

[0057] Optionally, the control signal includes a high-frequency signal and a low-frequency signal. In response to the heating instruction to heat the bottom, the control circuit sends a high-frequency signal to the first switch SW1 and the second switch SW2, so that the first switch SW1 controls the first coil L1 to be turned on and off with the power circuit at a first preset on-off frequency, and the second switch SW2 controls the second coil L2 to be turned on and off with the power circuit at the first preset on-off frequency. Alternatively, the controller sends a low-frequency signal to the first switch SW1 and the second switch SW2, so that the first switch SW1 controls the first coil L1 to be turned on and off with the power circuit at a second preset on-off frequency, and the second switch SW2 controls the second coil L2 to be turned on and off with the power circuit at a second preset on-off frequency.

[0058] The present application provides a control method for a heating circuit of a cooking device, and the control method can be applied to the heating circuit of the above cooking device. Figure 5 , Figure 5 FIG. 1 is a flow chart of an embodiment of a method for controlling a heating circuit of a cooking device provided by the present application. Figure 5 As shown, the control method includes the following steps:

[0059] Step S11: receiving a heating mode, wherein the heating mode includes a high-frequency heating mode or a low-frequency heating mode.

[0060] A heating mode of the heating circuit is received, wherein the heating mode includes a high-frequency heating mode or a low-frequency heating mode, wherein the power output of the high-frequency heating mode is greater than that of the low-frequency heating mode.

[0061] Step S12: In response to the heating mode being the high-frequency heating mode, controlling the first switch element and the second switch element to connect the first coil and the second coil to the power circuit at a first preset on-off frequency.

[0062] In response to the heating mode being the high-frequency heating mode, the first switch element and the second switch element are controlled to connect the first coil and the second coil to the power circuit at a first preset on-off frequency, wherein the conduction start time of the first coil and the conduction start time interval of the second coil. In the high-frequency heating mode, when the first coil and the second coil are alternately heated, the heat of the pot body portion corresponding to the coil that stops heating cannot be dissipated in a short time, and the heat at this position is equivalent to the heat of the pot body portion corresponding to the heated coil. Therefore, in the high-frequency heating mode, the first coil and the second coil can heat the pot body evenly, so that the heat on the pot body is evenly distributed, thereby improving the cooking quality of the cooking device, and further improving the user experience.

[0063] Step S13: In response to the heating mode being the low-frequency heating mode, controlling the first switch element and the second switch element to connect the first coil and the second coil to the power circuit at a second preset on-off frequency.

[0064] In response to the heating mode being the low-frequency heating mode, control the first switch and the second switch to connect the first coil and the second coil to the power supply circuit at a second preset on-off frequency. Among them, the conduction start time of the first coil is spaced from the conduction start time of the second coil, and the first preset on-off frequency is greater than the second preset on-off frequency. In the low-frequency heating mode, when the first coil and the second coil alternate in heating, the time interval between the coil that stops heating and the coil that is heating is greater than that in the high-frequency mode. Then, the heat of the pot body part corresponding to the coil that stops heating is less than the heat of the pot body part corresponding to the heating coil. Therefore, in the low-frequency heating mode, the alternate heating of the first coil and the second coil enables the food in the pot to roll. For example, when the cooking device is in the temperature-rising stage, the heating circuit operates in the low-frequency mode, which can make the food roll to avoid sticking to the pot; when the cooking device is in the boiling stage, the heating circuit operates in the low-frequency mode, and the rolling effect of the food in the pot is more obvious.

[0065] The control method of the heating circuit of the cooking device in this application includes receiving the heating mode, where the heating mode includes a high-frequency heating mode or a low-frequency heating mode; in response to the heating mode being the high-frequency heating mode, control the first switch and the second switch to connect the first coil and the second coil to the power supply circuit at a first preset on-off frequency; in response to the heating mode being the low-frequency heating mode, control the first switch and the second switch to connect the first coil and the second coil to the power supply circuit at a second preset on-off frequency; among them, the conduction start time of the first coil is spaced from the conduction start time of the second coil, and the first preset on-off frequency is greater than the second preset on-off frequency. By the above method, the heating circuit of this application can operate in the high-frequency mode or the low-frequency mode. In the high-frequency mode, the first coil and the second coil can uniformly heat the pot body, making the heat distribution on the pot body uniform, thereby improving the cooking quality of the cooking device and further enhancing the user experience; in the low-frequency heating mode, the alternate heating of the first coil and the second coil enables the food in the pot to roll, achieving non-stick of the food, thereby improving the cooking quality of the cooking device and further enhancing the user experience.

[0066] In other embodiments, the control method includes controlling the heating circuit to operate in a high-frequency heating mode in response to the cooking device entering the water absorption stage and / or the temperature rising stage. It can be understood that when the cooking device enters the water absorption stage and / or the temperature rising stage, an instruction for the heating mode to be the high-frequency heating mode is received, so that the heating circuit operates in the high-frequency heating mode. At this time, the first switch and the second switch are controlled to connect the first coil and the second coil to the power supply circuit at a first preset on-off frequency, so that the heating circuit operates in the high-frequency heating mode. At this time, the heat of the coil that stops heating is equivalent to the heat of the corresponding position of the cooking pot body of the heating coil, and the cooking pot body can be heated evenly, so that the heat distribution on the cooking pot body is uniform. In addition, since the time interval for switching between the first coil and the second coil is short, the output power of the first coil and the second coil is large, and the heating rate of the cooking device in the water absorption stage and / or the temperature rising stage can be increased.

[0067] In other embodiments, the control method includes controlling the heating circuit to operate in a low-frequency heating mode in response to the cooking device entering the boiling stage. It can be understood that when the cooking device enters the boiling stage, an instruction for the heating mode to be the low-frequency heating mode is received, so that the heating circuit operates in the low-frequency heating mode. At this time, the food in the cooking pot body is in a boiling state, and the heating circuit operates in the low-frequency working mode. The first coil L1 and the second coil L2 alternately heat the cooking pot body, so that the food in the cooking pot body realizes a tumbling effect, and the boiling effect of the food in the cooking pot body is more obvious. When the user has a need for low-sugar rice or rice soup, more rice soup can be discharged, and the rice soup can be collected better.

[0068] Optionally, the heating circuit further includes a third coil disposed at a side of the cooking pot body and spaced apart from the second coil, a third switch for connecting the first coil or the third coil to the first switch, a fourth coil disposed at the top of the cooking device, and a fourth switch for connecting the second coil or the fourth coil to the second switch. The heating mode further includes side heating and top heating. Refer to Figure 6 , Figure 6 is a schematic flowchart of another embodiment of the control method for the heating circuit of the cooking device provided by the present application. As Figure 6 shown, the control method includes the following steps:

[0069] Step S21: Receive a heating mode, where the heating mode includes a high-frequency heating mode, a low-frequency heating mode, side heating, and top heating.

[0070] Receive the heating mode. The heating mode of this embodiment includes a high-frequency heating mode, a low-frequency heating mode, side heating, and top heating.

[0071] Step S22: In response to the heating mode being the high-frequency heating mode, control the first switch and the second switch to connect the first coil and the second coil to the power supply circuit at a first preset on-off frequency.

[0072] Step S22 specifically refers to Step S12.

[0073] Step S23: In response to the heating mode being the low-frequency heating mode, control the first switch and the second switch to connect the first coil and the second coil to the power supply circuit at a second preset on-off frequency.

[0074] Step S23 specifically refers to Step S13.

[0075] Step S24: In response to the heating mode being side heating, control the third switch to connect the third coil to the first switch, and control the first switch to connect the third coil to the power supply circuit at a third preset on-off frequency.

[0076] In response to the heating mode being side heating, control the third switch to connect the third coil to the first switch, and control the first switch to connect the third coil to the power supply circuit at a third preset on-off frequency, so that the third coil heats the side of the cooking pot body. Among them, the third preset on-off frequency can be equal to the first preset on-off frequency or equal to the second preset on-off frequency.

[0077] In addition, the second switch can also be controlled to connect the second coil to the power supply circuit at a third preset on-off frequency, so that the second coil and the third coil alternately heat the side of the cooking pot body, which can improve the heating rate of the side of the cooking pot body.

[0078] Step S25: In response to the heating mode being top heating, control the fourth switch to connect the fourth coil to the second switch, and control the second switch to connect the fourth coil to the power supply circuit at a fourth preset on-off frequency.

[0079] In response to the heating mode being top heating, control the fourth switch to connect the fourth coil to the second switch, and control the second switch to connect the fourth coil to the power supply circuit at a fourth preset on-off frequency, so that the fourth coil heats the top of the cooking device. Among them, the fourth preset on-off frequency can be equal to the first preset on-off frequency, the second preset on-off frequency or the third preset on-off frequency.

[0080] In addition, the third switch can also be controlled to switch the first coil or the third coil that needs to generate heat, and control the first switch to connect the first coil or the third coil to the power supply circuit at a third preset on-off frequency, so that the fourth coil and the first coil alternately heat the top of the cooking device and the bottom of the cooking pot body, or the fourth coil and the third coil alternately heat the top of the cooking device and the side of the cooking pot body.

[0081] Refer to Figure 7 , Figure 7 is a schematic flowchart of another embodiment of the control method for the heating circuit of the cooking device provided by the present application. As Figure 7As shown in the figure, the heating control method is as follows: At the start of cooking, confirm the heating part of the cooking device. If the bottom of the pot body needs to be heated, control the third switch K1 and the fourth switch K2 to connect the first coil L1 and the second coil L2 to the power supply circuit respectively; and determine the heating modes of the first coil L1 and the second coil L2 connected to the power supply circuit. If it is a high-frequency heating mode, control the first switch SW1 to work at a first preset on-off frequency, and control the second switch SW2 to work at the first preset on-off frequency. If it is a low-frequency heating mode, control the first switch SW1 to work at a second preset on-off frequency, and control the second switch SW2 to work at the second preset on-off frequency. If the side needs to be heated, control the third switch K1 to connect the third coil L3 to the power supply circuit, and control the first switch SW1 to work at a third preset on-off frequency to achieve side heating. If the top of the cooking device needs to be heated, control the fourth switch K2 to connect the fourth coil L4 to the power supply circuit, and control the second switch SW2 to work at a fourth preset on-off frequency to achieve heating of the top of the pot body.

[0082] This application provides a cooking device. Refer to Figure 8 , Figure 8 FIG. is a schematic structural diagram of an embodiment of the cooking device provided by this application. As Figure 8 shown, the cooking device 20 includes a heating circuit (not shown in the figure). Among them, the heating circuit is any one of the heating circuits in the above heating circuit embodiments.

[0083] Optionally, the cooking device 20 further includes a lid 21 and a pot body 22. The lid 21 is covered on the top of the pot body 22. Specifically, the pot body 22 includes a pot 22a and a base 22b. The base 22b is provided with a cooking cavity (not marked in the figure), and the pot 22a is arranged in the cooking cavity. Among them, the heating circuit includes a first coil LI, a second coil L2, a third coil L3, and a fourth coil L4. Among them, the first coil L1 is arranged at the bottom of the pot 22a and on the base 22b, the second coil L2 and the third coil L3 are arranged at intervals on the side of the pot 22a and on the base 22b. Among them, the third coil L3 is close to one side of the opening of the base 22b, and the fourth coil L4 is arranged on the side of the lid 21 close to the pot body 22.

[0084] In the description of the present application, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0085] Any process or method description represented in the flowchart or described in other ways herein can be understood to represent an apparatus, segment, or part of code including one or more executable instructions for implementing a specific logical function or process, and the scope of the preferred embodiments of the present application includes additional implementations, where the functions can be executed in a substantially simultaneous manner or in a reverse order according to the involved functions, rather than in the order shown or discussed, which should be understood by those skilled in the technical field to which the embodiments of the present application belong.

[0086] The logic and / or steps represented in the flowchart or described in other ways herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, apparatus, or device (which can be a personal computer, server, network device, or other system that can fetch instructions from the instruction execution system, apparatus, or device and execute the instructions), or in combination with these instruction execution systems, apparatuses, or devices.

[0087] The above are only the embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present application.

Claims

1. A heating circuit of a cooking device, characterized in that, At least including: A first coil, a second coil, a first switch and a second switch. Wherein, the first coil is arranged at the bottom of the cooking pot body of the cooking device, the second coil is arranged at the side of the pot body, the first switch is used to control the on-off of the first coil and the power supply circuit of the cooking device, and the second switch is used to control the on-off of the second coil and the power supply circuit; Wherein, the conduction start time interval between the first coil and the second coil; Wherein, in the high-frequency heating mode, the first switch and the second switch control the first coil and the second coil at a first preset on-off frequency, and in the low-frequency heating mode, the first switch and the second switch control the first coil and the second coil at a second preset on-off frequency, and the first preset on-off frequency is greater than the second preset on-off frequency.

2. The heating circuit according to claim 1, wherein, In the water absorption stage and / or the temperature rise stage of the cooking device, the first switch controls the on-off of the first coil and the power supply circuit at the first preset on-off frequency, and the second switch controls the on-off of the second coil and the power supply circuit at the first preset on-off frequency, so that the heating circuit works in the high-frequency heating mode.

3. The heating circuit according to claim 1, characterized in that In the boiling stage of the cooking device, the first switch controls the on-off of the first coil and the power supply circuit at the second preset on-off frequency, and the second switch controls the on-off of the second coil and the power supply circuit at the second preset on-off frequency, so that the heating circuit works in the low-frequency heating mode.

4. The heating circuit according to claim 1, wherein The heating circuit further includes a third coil and a third switch. The third coil is at least partially arranged at the side of the pot body and is arranged at an interval from the second coil. The third switch is used to connect the first coil or the third coil with the first switch. When the third switch connects the third coil with the first switch, the first switch is further used to control the on-off of the third coil and the power supply circuit at a third preset on-off frequency.

5. The heating circuit according to claim 4, wherein The heating circuit further includes a fourth coil and a fourth switch. The fourth coil is arranged at the top of the cooking device. The fourth switch is used to connect the second coil or the fourth coil with the second switch. When the fourth switch connects the fourth coil with the second switch, the second switch is further used to control the on-off of the fourth coil and the power supply circuit at a fourth preset on-off frequency.

6. The heating circuit according to claim 5, characterized in that The heating circuit further includes a control circuit. The control circuit is electrically connected to the first switch, the second switch, the third switch and the fourth switch respectively. The control circuit is used to send control signals to the first switch and the second switch to control the on-off of the first switch and the second switch. The control circuit is further used to control the third switch to connect the first coil or the third coil with the first switch. The control circuit is further used to control the fourth switch to connect the second coil or the fourth coil with the second switch.

7. The heating circuit according to claim 6, wherein: the control circuit receives a heating instruction, where the heating instruction includes heating the bottom, heating the side, and heating the top; in response to the heating instruction being to heat the bottom, the control circuit controls the third switch to connect the first coil, controls the fourth switch to connect the second coil, and sends control signals to the first switch and the second switch to control the on / off of the first switch and the second switch, so that the first coil and the second coil heat the bottom; in response to the heating instruction being to heat the side, the control circuit controls the third switch to connect the third coil, and sends a control signal to the first switch to control the on / off of the first switch, so that the third coil heats the side; in response to the heating instruction being to heat the top, the control circuit controls the fourth switch to connect the fourth coil, and sends a control signal to the second switch to control the on / off of the second switch, so that the fourth coil heats the side.

8. The heating circuit according to claim 7, wherein The control signal includes a high-frequency signal and a low-frequency signal. In response to the heating instruction being to heat the bottom, the control circuit sends a high-frequency signal to the first switch and the second switch, so that the first switch controls the on / off of the first coil and the power supply circuit at the first preset on / off frequency, and the second switch controls the on / off of the second coil and the power supply circuit at the first preset on / off frequency; or the controller sends a low-frequency signal to the first switch and the second switch, so that the first switch controls the on / off of the first coil and the power supply circuit at the second preset on / off frequency, and the second switch controls the on / off of the second coil and the power supply circuit at the second preset on / off frequency.

9. The heating circuit according to claim 6, characterized in that, The first switch includes a first power switch, the second switch includes a second power switch, and the control signal includes a pulse modulation signal; the third switch includes a third selection switch, and the fourth switch includes a fourth selection switch.

10. A control method for a heating circuit of a cooking device, characterized in that, For the heating circuit according to any one of claims 1-9, the control method includes: receiving a heating mode, where the heating mode includes a high-frequency heating mode or a low-frequency heating mode; in response to the heating mode being the high-frequency heating mode, controlling the first switch and the second switch to connect the first coil and the second coil to the power supply circuit at a first preset on / off frequency; in response to the heating mode being the low-frequency heating mode, controlling the first switch and the second switch to connect the first coil and the second coil to the power supply circuit at a second preset on / off frequency; wherein, the conduction start time of the first coil is spaced from the conduction start time of the second coil, and the first preset on / off frequency is greater than the second preset on / off frequency.

11. The control method according to claim 10, wherein The control method includes: in response to the cooking device entering the water absorption stage and / or the temperature rising stage, controlling the heating circuit to operate in the high-frequency heating mode.

12. The control method according to claim 10, characterized in that, The control method includes: In response to the cooking device entering the boiling stage, controlling the heating circuit to operate in the low-frequency heating mode.

13. The control method according to claim 10, wherein The heating circuit further includes a third coil disposed at a side portion of the pot body and spaced apart from the second coil, a third switch for connecting the first coil or the third coil to the first switch member, a fourth coil disposed at the top of the cooking device, and a fourth switch for connecting the second coil or the fourth coil to the second switch member. The heating mode further includes heating the side portion or heating the top portion. The control method further includes: In response to the heating mode being heating the side portion, controlling the third switch to connect the third coil to the first switch member, and controlling the first switch to connect the third coil to the power supply circuit at a third preset on / off frequency; In response to the heating mode being heating the top portion, controlling the fourth switch to connect the fourth coil to the second switch member, and controlling the second switch to connect the fourth coil to the power supply circuit at a fourth preset on / off frequency.

14. A cooking device, characterized in that, It includes: The heating circuit according to any one of claims 1-9.

Images