Cooking utensil and control circuit thereof

Abstract

The utility model discloses a cooking utensil and a control circuit thereof. The cooking utensil control circuit comprises a first control circuit, a second control circuit, a third control circuit and a plurality of circuit modules. The second control circuit is in communication connection with the first control circuit and the third control circuit. Each circuit module is electrically connected with one of the first control circuit, the second control circuit and the third control circuit. The utility model aims to improve the compatibility of the cooking utensil with different functional circuits.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit board design in cooking appliances, in particular to a cooking appliance and a control circuit thereof. Background Art

[0002] In cooking appliances, such as IH electric pressure cookers and rice cookers, a first control circuit for controlling a display panel to output an image and a second control circuit for controlling a plurality of circuit modules are generally provided. However, in actual design, the number of pins of the second control circuit and the first control circuit is limited, which cannot meet the future diversified functional requirements of cooking appliances. Utility Model Content

[0003] The main purpose of the utility model is to provide a cooking appliance control circuit, aiming to improve the compatibility of the cooking appliance with circuits of different functions.

[0004] To achieve the above object, the utility model proposes a cooking appliance control circuit, comprising:

[0005] a first control circuit;

[0006] a second control circuit;

[0007] A third control circuit; and, a plurality of circuit modules;

[0008] The second control circuit is respectively connected to the first control circuit and the third control circuit for communication; each of the circuit modules is electrically connected to one of the first control circuit, the second control circuit and the third control circuit.

[0009] Optionally, the first control circuit and the third control circuit are communicatively connected.

[0010] Optionally, the first control circuit includes a first controller and a first communication module electrically connected to the first controller;

[0011] The second control circuit includes a second controller and a second communication module electrically connected to the second controller;

[0012] The third control circuit includes a third controller and a third communication module electrically connected to the third controller;

[0013] Among them, the first controller is communicatively connected with the second controller via the first communication module and the second communication module; the first controller is communicatively connected with the third controller via the first communication module and the third communication module; the second controller is communicatively connected with the third controller via the second communication module and the third communication module.

[0014] Optionally, the first controller and the first communication module are integrated in the same integrated chip; and / or,

[0015] The second controller and the second communication module are integrated in the same integrated chip; and / or,

[0016] The third controller and the third communication module are integrated in the same integrated chip.

[0017] Optionally, the plurality of circuit modules include a display driving circuit;

[0018] The display driving circuit is electrically connected to the first control circuit and is used to access the display panel.

[0019] Optionally, the plurality of circuit modules include a temperature detection circuit;

[0020] The temperature detection circuit is electrically connected to the second control circuit and is used to detect the temperature of the cooking utensil and output a corresponding temperature detection signal.

[0021] Optionally, the temperature detection circuit includes a steam temperature detection circuit, the steam temperature detection circuit is electrically connected to the second control circuit, and is used to detect the temperature in the cooking appliance and output a corresponding steam temperature detection signal; wherein the temperature detection signal includes the steam temperature detection signal;

[0022] And / or, the cooking appliance includes an inner pot, the temperature detection circuit includes an inner pot temperature detection circuit, the inner pot temperature detection circuit is electrically connected to the second control circuit, and is used to detect the temperature inside the inner pot and output a corresponding inner pot temperature detection signal; wherein, the temperature detection signal includes the inner pot temperature detection signal.

[0023] Optionally, the plurality of circuit modules further include a fan switch control circuit, and the fan switch control circuit is used to connect to a fan;

[0024] Wherein, the fan switch control circuit is electrically connected to the first control circuit; the first control circuit is used to control the fan switch control circuit to control the working state of the fan according to the temperature detection signal transmitted by the second control circuit; or,

[0025] The fan switch control circuit is electrically connected to the second control circuit; the second control circuit is used to control the fan switch control circuit to control the working state of the fan according to the temperature detection signal.

[0026] Optionally, the plurality of circuit modules include at least one of the following circuits:

[0027] an operating voltage detection circuit, the output end of which is electrically connected to the third control circuit and is used to detect the operating voltage of the cooking appliance and output a corresponding voltage detection signal to the third control circuit;

[0028] a working current detection circuit, the output end of which is electrically connected to the third control circuit and is used to detect the working current of the cooking appliance and output a corresponding current detection signal to the third control circuit;

[0029] a power supply voltage zero-crossing detection circuit, wherein the output end of the power supply voltage zero-crossing detection circuit is electrically connected to the third control circuit and is used to detect the zero point of the power supply voltage of the cooking appliance and output a corresponding zero-crossing detection signal to the third control circuit;

[0030] A protection detection circuit is electrically connected to the third control circuit, and is used to detect the working state of the cooking appliance and output a corresponding protection detection signal to the third control circuit.

[0031] Optionally, the plurality of circuit modules further include:

[0032] A switch circuit, wherein a controlled end of the switch circuit is electrically connected to the third control circuit and is configured to be in an open or closed state under the control of the third control circuit.

[0033] Optionally, the plurality of circuit modules further include: a switch temperature detection circuit, which is electrically connected to the third control circuit and is used to detect the temperature of the switch circuit and output a corresponding switch temperature detection signal to the third control circuit.

[0034] The utility model also provides a cooking appliance, comprising the cooking appliance control circuit as described in any one of the above items.

[0035] Optionally, the cooking utensil includes an IH electric pressure cooker and an IH rice cooker.

[0036] The utility model discloses a cooking appliance control circuit, comprising a first control circuit, a second control circuit, a third control circuit and a plurality of circuit modules. The second control circuit is respectively connected to the first control circuit and the third control circuit in communication; each circuit module is electrically connected to one of the first control circuit, the second control circuit and the third control circuit. Thus, in practical applications, when the cooking appliance is updated and designed in different versions, the control circuit inside can have enough pins to access circuit modules with different functions, thereby effectively improving the compatibility of the cooking appliance with circuits with different functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0038] Figure 1 This is a circuit module diagram of an embodiment of a cooking utensil control circuit of the present utility model;

[0039] Figure 2 It is a circuit module schematic diagram of another embodiment of the cooking utensil control circuit of the utility model;

[0040] Figure 3 This is a circuit module diagram of another embodiment of the cooking utensil control circuit of the utility model;

[0041] Figure 4 This is a circuit module diagram of another embodiment of the cooking utensil control circuit of the present invention.

[0042] Description of Figure Numbers:

[0043]

[0044] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0046] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0047] In cooking appliances, such as IH electric pressure cookers and rice cookers, a first control circuit for controlling a display panel to output an image and a second control circuit for controlling a plurality of circuit modules are generally provided. However, in actual design, the number of pins of the second control circuit and the first control circuit is limited, which cannot meet the future diversified functional requirements of cooking appliances.

[0048] To this end, the utility model proposes a cooking appliance control circuit, referring to Figure 1 , in one embodiment of the utility model, comprising:

[0049] A first control circuit 10;

[0050] A second control circuit 20;

[0051] A third control circuit 30; and a plurality of circuit modules 40;

[0052] The second control circuit 20 is respectively connected to the first control circuit 10 and the third control circuit 30 for communication; each of the circuit modules 40 is electrically connected to one of the first control circuit 10 , the second control circuit 20 and the third control circuit 30 .

[0053] In this embodiment, the first control circuit 10, the second control circuit 20 and the third control circuit 30 can all be implemented by a main controller, such as an MCU, a DSP (Digital Signal Process), an FPGA (Field Programmable Gate Array), etc. The multiple circuit modules 40 may include: a display drive module, a switch circuit 49, a cooking appliance working condition detection circuit, a trigger module, etc., and at least one circuit module 40 having the following functions.

[0054] In this embodiment, optionally, the second control circuit 20 can establish electrical connection paths with the first control circuit 10 and the third control circuit 30 through its own multiple serial communication interfaces, such as SPI serial communication interface, UART serial communication interface, etc., so that it can realize data mutual transmission or unidirectional data transmission with the first control circuit 10 and the third control circuit 30 in the form of digital signals. Optionally, the second control circuit 20 can also establish electrical connection paths with the first control circuit 10 and the third control circuit 30 through its own multiple ordinary IO interfaces, so as to output high and low level signals through ordinary IO interfaces, or analog signals of a certain voltage, so as to realize data mutual transmission or unidirectional data transmission with the first control circuit 10 and the third control circuit 30. For example, the current first control circuit 10 is electrically connected to a fan switch control module for connecting a fan, and the second control circuit 20 is electrically connected to a temperature detection circuit. The second control circuit 20 outputs a corresponding high-level signal or a low-level signal to the first control circuit 10 according to the detection and feedback results of the temperature detection circuit. When the first control circuit 10 receives a high-level signal, it is in a state of controlling the fan switch control module to control the fan to be in a working state. When the first control circuit 10 receives a low-level signal, it is in a state of controlling the fan switch control module to control the fan to be in a stopped working state.

[0055] Specifically, in the present embodiment, each circuit module 40 is electrically connected to one of the first control circuit 10, the second control circuit 20 and the third control circuit 30. Each control circuit can control the operation of other circuit modules 40 electrically connected thereto according to the signal detected and fed back by the circuit module 40 electrically connected thereto, and / or transmit the signal transmitted from the circuit module 40 electrically connected thereto to other control circuits, and / or output the corresponding command signal to other control circuits according to the signal transmitted from other control circuits, and / or save the signal transmitted from other control circuits. For example, the first control circuit 10 is currently the main control circuit in the cooking utensil, the second control circuit 20 will output the signal transmitted from the circuit module 40 electrically connected thereto for detection to the first control circuit 10 for storage, and the third control circuit 30 will output the signal transmitted from the circuit module 40 electrically connected thereto for detection to the first control circuit 10 via the second control circuit 20 for storage. Thus, in actual applications, when the cooking appliance is updated and designed in different versions, compared with the two control circuits in the prior art, the design in the utility model can enable all the control circuits therein to have more pins to additionally connect to the circuit modules 40 with different functions and implement the corresponding control actions, thereby effectively improving the compatibility of the cooking appliance with circuits with different functions, thereby effectively meeting the user's growing functional demands for the cooking appliance.

[0056] The utility model discloses a cooking appliance control circuit, comprising a first control circuit 10, a second control circuit 20, a third control circuit 30 and a plurality of circuit modules 40. The second control circuit 20 is respectively connected to the first control circuit 10 and the third control circuit 30 for communication; each circuit module 40 is electrically connected to one of the first control circuit 10, the second control circuit 20 and the third control circuit 30. Thus, in practical applications, when the cooking appliance is updated and designed in different versions, the control circuit inside can have enough pins to access the circuit modules 40 with different functions, thereby effectively improving the compatibility of the cooking appliance with circuits with different functions.

[0057] It is understandable that the first control circuit 10 may not be electrically connected to the third control circuit 30. Figure 2 In one embodiment of the utility model, the first control circuit 10 and the third control circuit can also establish a communication connection between each other to achieve direct data transmission.

[0058] Specifically, the first control circuit 10 includes a first controller 11 and a first communication module 12 electrically connected to the first controller 11;

[0059] The second control circuit 20 includes a second controller 21 and a second communication module 22 electrically connected to the second controller 21;

[0060] The third control circuit 30 includes a third controller 31 and a third communication module 32 electrically connected to the third controller 31;

[0061] Among them, the first controller 11 is communicatively connected with the second controller 21 via the first communication module 12 and the second communication module 22; the first controller 11 is communicatively connected with the third controller 31 via the first communication module 12 and the third communication module 32; the second controller 21 is communicatively connected with the third controller 31 via the second communication module 22 and the third communication module 32.

[0062] In this embodiment, optionally, reference Figure 3 The first communication module 12, the second communication module 22 and the third communication module 32 can adopt wired communication modules, such as CAN communication module, SPI serial port module, RS485 communication module, etc. Each controller can realize data transmission with other controllers via the wired communication module electrically connected to itself.

[0063] Optionally, in another embodiment, the first communication module 12, the second communication module 22 and the third communication module 32 can also adopt wireless communication modules, such as a Bluetooth communication module, a 4G / 5G communication module, a local area network communication module, a WiFi communication module, etc., so that each controller can transmit data with other controllers via the wireless communication module electrically connected to itself.

[0064] It can be understood that the first controller 11 and the first communication module 12 are integrated in the same integrated chip; and / or the second controller 21 and the second communication module 22 are integrated in the same integrated chip; and / or the third controller 31 and the third communication module 32 are integrated in the same integrated chip.

[0065] Thus, through the above arrangement, direct data transmission between any two control circuits among the first control circuit 10, the second control circuit 20 and the third control circuit 30 can be achieved, thereby effectively improving the communication efficiency and response speed between different control circuits.

[0066] refer to Figure 4 In one embodiment of the present utility model, the plurality of circuit modules 40 include a display driving circuit 41;

[0067] The display driving circuit 41 is electrically connected to the first control circuit 10 and is used to access a display panel.

[0068] In this embodiment, the display panel can be implemented by a display panel such as an LED screen, an LCD screen, an OLED screen, a MINILED screen, a TFT screen, etc., and the display driver circuit 4110 can be implemented by a display driver chip matching the display panel, or by a switch driver circuit composed of multiple switch tubes. The first control circuit 10 can control the display driver circuit 4110 to drive the display panel to display different images according to the received external signal.

[0069] In addition, it can be understood that the display driving circuit 41 can also be electrically connected to the second control circuit 20 or the third control circuit 30 .

[0070] refer to Figure 4 , in one embodiment of the utility model, the plurality of circuit modules 40 include a temperature detection circuit;

[0071] The temperature detection circuit is electrically connected to the second control circuit 20 and is used to detect the temperature of the cooking utensil and output a corresponding temperature detection signal.

[0072] In this embodiment, the temperature detection circuit can be implemented by a voltage-dividing temperature detection circuit composed of an NTC resistor or a PTC resistor and a fixed resistance resistor, and the voltage-dividing voltage signal output by the voltage-dividing temperature detection circuit is the temperature detection signal output by the temperature detection circuit. Among them, the NTC resistor or the PTC resistor can be implemented by an NTC probe resistor or a PTC probe resistor, so that it can be fixed in the cooking utensil. Alternatively, the temperature detection circuit can also be implemented by a temperature sensor, such as an infrared temperature sensor, which can detect the temperature of the target to be detected and output the result in the form of a digital signal or an analog signal, that is, output a corresponding temperature detection signal.

[0073] Specifically, the temperature detection circuit includes a steam temperature detection circuit 42, which is electrically connected to the second control circuit 20 and is used to detect the temperature in the cooking appliance and output a corresponding steam temperature detection signal; wherein the temperature detection signal includes a steam temperature detection signal;

[0074] And / or, the cooking appliance includes an inner pot, the temperature detection circuit includes an inner pot temperature detection circuit 43, the inner pot temperature detection circuit 43 is electrically connected to the second control circuit 20, and is used to detect the temperature inside the inner pot and output a corresponding inner pot temperature detection signal; wherein the temperature detection signal includes an inner pot temperature detection signal.

[0075] In this embodiment, the inner pot temperature detection circuit 43 may include the above-mentioned NTC probe resistor so as to be fixed on the inner pot, thereby improving the accuracy of the inner pot temperature detection. Similarly, the steam temperature detection circuit 42 may also include the above-mentioned NTC probe resistor so as to be fixed on the cooking utensil so as to improve the accuracy of the steam temperature detection.

[0076] It is understandable that the inner pot temperature detection circuit 43 and the steam temperature detection circuit 42 may also be electrically connected to the first control circuit 10 or the third control circuit 30 .

[0077] In addition, reference Figure 4 In one embodiment of the utility model, the plurality of circuit modules 40 further include a fan switch control circuit 44, and the fan switch control circuit 44 is used to connect to a fan;

[0078] The fan switch control circuit 44 is electrically connected to the first control circuit 10; the first control circuit 10 is used to control the fan switch control circuit 44 to control the working state of the fan according to the temperature detection signal transmitted by the second control circuit 20; or,

[0079] The fan switch control circuit 44 is electrically connected to the second control circuit 20; the second control circuit 20 is used to control the fan switch control circuit 44 to control the working state of the fan according to the temperature detection signal.

[0080] In this embodiment, the fan switch control circuit 44 can be implemented by a switch tube, such as a MOS tube, an IGBT tube, a triode, etc., or by a contact switch, such as a contactor, a relay, etc. The input end of the fan switch control circuit 44 is electrically connected to the power supply end, and the output end is used to be electrically connected to the fan. The fan switch control circuit 44 can work according to the received fan control signal to drive the fan to rotate at a corresponding speed or to be in a stopped working state.

[0081] Specifically, when the fan switch control circuit 44 is electrically connected to the first control circuit 10, the second control circuit 20 can output the temperature result to the first control circuit 10 via communication after determining the current temperature inside the cooking appliance based on the temperature detection signal fed back by the temperature detection circuit, so that the first control circuit 10 can directly output the corresponding fan control signal to the fan switch control circuit 44 based on the temperature detection result and the temperature-fan speed mapping table with thresholds set by R&D personnel, so as to drive the fan to work.

[0082] When the fan switch control circuit 44 is electrically connected to the second control circuit 20, the second control circuit 20 can directly determine the current temperature in the cooking appliance according to the temperature detection signal fed back by the temperature detection circuit, and directly output the corresponding fan control signal to the fan switch control circuit 44 according to the temperature-fan speed mapping table with thresholds set by the R&D personnel, so as to drive the fan to work. There is no need to output the fan control signal to other control circuits for control circuits, which effectively reduces the complexity of communication and program processing between the two control circuits in the cooking appliance.

[0083] It is understandable that the fan switch control circuit 44 may also be electrically connected to the third control circuit 30 .

[0084] refer to Figure 4 In one embodiment of the present utility model, the plurality of circuit modules 40 further include:

[0085] The switch circuit 49 has a controlled end electrically connected to the third control circuit 30 and is configured to be in an open or closed state under the control of the third control circuit 30 .

[0086] In this embodiment, the switch circuit 49 can be implemented by a switch tube, such as a MOS tube, an IGBT tube, a triode, etc., or by a contact switch, such as a contactor, a relay, etc. The third control circuit 30 can control the switch circuit 49 to be in an open or closed state to turn on or off the path between the circuits electrically connected to the input end and the output end of the switch circuit 49. For example, the input end of the switch circuit 49 is electrically connected to a power management circuit for outputting a working voltage, and the output end is electrically connected to a heating device. The third control circuit 30 can control the switch circuit 49 to be in an open or closed state to control the heating device to be in a stopped or working state. Specifically, the third control circuit 30 can control the switch circuit 49 to work according to a trigger signal from a circuit module 40 electrically connected thereto. For example, the circuit module 40 is a trigger module, and the user controls the trigger module to control the working state of the switch circuit 49 by the third control circuit 30, and / or controls the working state of the switch circuit 49 according to control instructions received from other control circuits.

[0087] At the same time, it should be understood that, when the switch circuit 49 is working, the multiple switch tubes or switch devices therein will generate a lot of heat, so in order to ensure the safety of its operation. In an embodiment of the utility model, the multiple circuit modules 40 also include: a switch temperature detection circuit 490, which is electrically connected to the third control circuit 30 and is used to detect the temperature of the switch circuit 49 and output a corresponding switch temperature detection signal to the third control circuit 30.

[0088] In this embodiment, the switch temperature detection circuit 490 can be implemented by using the same device as the inner pot temperature detection circuit 43 and the steam temperature detection circuit 42, and is used to detect the temperature of the switch device in the switch circuit 49 and output the corresponding switch temperature detection signal to the third control circuit 30. The third control circuit 30 can determine the working state of the switch device in the switch circuit 49 according to the switch temperature detection signal, and perform corresponding control actions, for example, when the temperature of the switch device reaches a preset alarm temperature, the switch circuit 49 is controlled to stop working to prevent the switch device in the switch circuit 49 from burning out.

[0089] It is understandable that the third control circuit 30 can also upload the switch temperature detection signal to the first control circuit 10 via the second control circuit 20 for storage. In addition, the switch circuit 49 and the switch temperature detection circuit 490 can also be electrically connected to the first control circuit 10 and the second control circuit 20.

[0090] refer to Figure 4 In one embodiment of the present invention, the plurality of circuit modules 40 include at least one of the following circuits:

[0091] A working voltage detection circuit 45, the output end of which is electrically connected to the third control circuit 30, and is used to detect the working voltage of the cooking appliance and output a corresponding voltage detection signal to the third control circuit 30;

[0092] A working current detection circuit 46, the output end of which is electrically connected to the third control circuit 30, and is used to detect the working current of the cooking appliance and output a corresponding current detection signal to the third control circuit 30;

[0093] A power supply voltage zero-crossing detection circuit 47, the output end of which is electrically connected to the third control circuit 30 and is used to detect the zero point of the power supply voltage of the cooking appliance and output a corresponding zero-crossing detection signal to the third control circuit 30;

[0094] The protection detection circuit 48 is electrically connected to the third control circuit 30 . The protection detection circuit 48 is used to detect the working state of the cooking appliance and output a corresponding protection detection signal to the third control circuit 30 .

[0095] In this embodiment, the working voltage detection circuit 45 can be implemented by a resistor voltage divider circuit, or by a voltage detection chip or a voltage sampling chip. The third control circuit 30 can determine the working voltage in the cooking appliance, such as the input power supply voltage or the voltage between the circuit modules 40, or the voltage output to the heating device, according to the voltage detection signal output by the working voltage detection circuit 45, and control the switch circuit 49 to work according to the working voltage. For example, the working voltage is the voltage output to the heating device, the input end of the switch circuit 49 is electrically connected to the power supply end, and the output end is electrically connected to the heating device. The third control circuit 30 will receive an external power setting signal according to the circuit module 40 electrically connected to it, or determine the preset heating power according to the power setting signal transmitted to it by other control circuits, then the heating power of the current heating device can be calculated according to the voltage output to the heating device detected by the working voltage detection circuit 45 and the current flowing through the switch circuit 49 as described below, and the switch circuit 49 can be controlled to work according to the preset heating power, so that the difference between the heating power of the heating device and the preset heating power is less than the difference preset by the R&D personnel.

[0096] At the same time, the third control circuit 30 also transmits the voltage detection signal output by the working voltage detection circuit 45 to the first control circuit 10 for monitoring and storage by the first control circuit 10. It is understandable that the working voltage detection circuit 45 can be electrically connected to the first control circuit 10 or the second control circuit 20.

[0097] In this embodiment, the working current detection circuit 46 can be implemented by a shunt composed of a current sensing resistor, a Hall current sensor, etc. The third control circuit 30 can determine the working current in the cooking appliance, such as the total working current of the appliance, the current between different circuit modules 40, or the current output to the heating device, according to the current detection signal detected and output by the working current detection circuit 46, so as to control the corresponding circuit to perform the corresponding action. For example, the current working current detection circuit 46 detects the current flowing through the switch circuit 49 and output to the heating device in the above embodiment. The third control circuit 30 will adjust the heating power of the heating device connected to the switch circuit 49 according to the current flowing and the detected voltage in accordance with the process of the above embodiment.

[0098] At the same time, the third control circuit 30 also transmits the current detection signal output by the working current detection circuit 46 to the first control circuit 10 for monitoring and storage by the first control circuit 10. It is understandable that the working current detection circuit 46 can be electrically connected to the first control circuit 10 or the second control circuit 20.

[0099] In this embodiment, the power supply voltage zero-crossing detection circuit 47 can be implemented by a voltage zero-point detection chip, or by a zero-crossing detection circuit composed of a switch device, an optical coupling device, etc. The third control circuit 30 can determine the power supply voltage input to the cooking appliance, such as the zero point of the mains voltage, according to the zero-crossing detection signal outputted by it, and control the corresponding circuit to perform the corresponding action, such as controlling the switch circuit 49 to work, so that the zero point of the voltage outputted by the switch circuit 49 to the heating device is consistent with the zero point of the mains voltage, thereby ensuring the stability and reliability of the operation of the cooking appliance.

[0100] At the same time, the third control circuit 30 also transmits the zero-crossing detection signal output by the power supply voltage zero-crossing detection circuit 47 to the first control circuit 10 for monitoring and storage by the first control circuit 10. It can be understood that the power supply voltage zero-crossing detection circuit 47 can be electrically connected to the first control circuit 10 or the third control circuit 30.

[0101] In this embodiment, the protection detection circuit 48 may include a voltage surge detection circuit, a current peak detection circuit, a temperature detection circuit, etc. Specifically, the protection detection circuit 48 may detect the surge value of the power supply voltage currently input to the cooking appliance and / or the peak value of the total working current, and when it is confirmed that the surge of the power supply voltage reaches a preset surge voltage value or the peak current reaches a preset peak current value (both of which may be preset in the third control circuit 30 by the R&D personnel), the switch circuit 49 is controlled to perform a protection action, such as controlling the switch circuit 49 to be in an open state, thereby protecting the cooking appliance.

[0102] At the same time, the third control circuit 30 also transmits the protection detection signal output by the protection detection circuit 48 to the first control circuit 10 for monitoring and storage by the first control circuit 10. It is understandable that the protection detection circuit 48 can be electrically connected to the first control circuit 10 or the third control circuit 30.

[0103] The utility model also provides a cooking appliance, comprising any one of the above cooking appliance control circuits.

[0104] In this embodiment, the cooking appliance includes an IH electric pressure cooker and an IH rice cooker.

[0105] It is worth noting that, since the cooking appliance of the present invention includes all technical solutions of all embodiments of the above-mentioned cooking appliance control circuit, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned cooking appliance control circuit, which will not be described one by one here.

[0106] The above contents are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention specification and drawings under the utility model concept, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A cooking appliance control circuit, characterized in that: include: a first control circuit; a second control circuit; A third control circuit; and, a plurality of circuit modules; The second control circuit is respectively connected to the first control circuit and the third control circuit for communication; each of the circuit modules is electrically connected to one of the first control circuit, the second control circuit and the third control circuit.

2. The cooking appliance control circuit according to claim 1, characterized in that: The first control circuit is communicatively connected with the third control circuit.

3. The cooking appliance control circuit according to claim 2, characterized in that: The first control circuit includes a first controller and a first communication module electrically connected to the first controller; The second control circuit includes a second controller and a second communication module electrically connected to the second controller; The third control circuit includes a third controller and a third communication module electrically connected to the third controller; Among them, the first controller is communicatively connected with the second controller via the first communication module and the second communication module; the first controller is communicatively connected with the third controller via the first communication module and the third communication module; the second controller is communicatively connected with the third controller via the second communication module and the third communication module.

4. The cooking appliance control circuit according to claim 3, characterized in that: The first controller and the first communication module are integrated in the same integrated chip; and / or, The second controller and the second communication module are integrated in the same integrated chip; and / or, The third controller and the third communication module are integrated in the same integrated chip.

5. The cooking appliance control circuit according to any one of claims 1 to 4, characterized in that: The plurality of circuit modules include a display driving circuit; The display driving circuit is electrically connected to the first control circuit and is used to access the display panel.

6. The cooking appliance control circuit according to any one of claims 1 to 4, characterized in that: A plurality of the circuit modules include a temperature detection circuit; The temperature detection circuit is electrically connected to the second control circuit and is used to detect the temperature of the cooking utensil and output a corresponding temperature detection signal.

7. The cooking appliance control circuit according to claim 6, characterized in that: The temperature detection circuit includes a steam temperature detection circuit, which is electrically connected to the second control circuit and is used to detect the temperature in the cooking appliance and output a corresponding steam temperature detection signal; wherein the temperature detection signal includes the steam temperature detection signal; And / or, the cooking appliance includes an inner pot, the temperature detection circuit includes an inner pot temperature detection circuit, the inner pot temperature detection circuit is electrically connected to the second control circuit, and is used to detect the temperature inside the inner pot and output a corresponding inner pot temperature detection signal; wherein, the temperature detection signal includes the inner pot temperature detection signal.

8. The cooking appliance control circuit according to claim 6, characterized in that: The plurality of circuit modules further include a fan switch control circuit, and the fan switch control circuit is used to connect to a fan; Wherein, the fan switch control circuit is electrically connected to the first control circuit; the first control circuit is used to control the fan switch control circuit to control the working state of the fan according to the temperature detection signal transmitted by the second control circuit; or, The fan switch control circuit is electrically connected to the second control circuit; the second control circuit is used to control the fan switch control circuit to control the working state of the fan according to the temperature detection signal.

9. The cooking appliance control circuit according to any one of claims 1 to 4, characterized in that: The plurality of circuit modules include at least one of the following circuits: an operating voltage detection circuit, the output end of which is electrically connected to the third control circuit and is used to detect the operating voltage of the cooking appliance and output a corresponding voltage detection signal to the third control circuit; a working current detection circuit, the output end of which is electrically connected to the third control circuit and is used to detect the working current of the cooking appliance and output a corresponding current detection signal to the third control circuit; a power supply voltage zero-crossing detection circuit, wherein the output end of the power supply voltage zero-crossing detection circuit is electrically connected to the third control circuit and is used to detect the zero point of the power supply voltage of the cooking appliance and output a corresponding zero-crossing detection signal to the third control circuit; A protection detection circuit is electrically connected to the third control circuit, and is used to detect the working state of the cooking appliance and output a corresponding protection detection signal to the third control circuit.

10. The cooking appliance control circuit according to any one of claims 1 to 4, characterized in that: The plurality of circuit modules also include: A switch circuit, wherein a controlled end of the switch circuit is electrically connected to the third control circuit and is configured to be in an open or closed state under the control of the third control circuit.

11. The cooking appliance control circuit according to claim 10, characterized in that: The plurality of circuit modules also include: a switch temperature detection circuit, which is electrically connected to the third control circuit and is used to detect the temperature of the switch circuit and output a corresponding switch temperature detection signal to the third control circuit.

12. A cooking utensil, characterized in that: The cooking appliance control circuit comprises the cooking appliance control circuit as described in any one of claims 1 to 11.

13. The cooking device according to claim 12, characterized in that: The cooking utensils include an IH electric pressure cooker and an IH rice cooker.

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