Cooking utensil and circuit board assembly thereof

Abstract

The utility model discloses a cooking utensil and a circuit board assembly thereof. The cooking utensil circuit board assembly comprises a display driving circuit, a first control circuit, a second control circuit, a temperature detection circuit and a fan switch control circuit, the display driving circuit is used for being connected with a display panel, the first control circuit is electrically connected with the display driving circuit, and the first control circuit is electrically connected with the second control circuit. Wherein one of the temperature detection circuit and the fan switch control circuit is electrically connected with the first control circuit, and the other one is electrically connected with the second control circuit; or the first control circuit is electrically connected with the temperature detection circuit and the fan switch control circuit respectively. The utility model aims to reduce the complexity of communication and program processing between two control circuits in the cooking utensil.

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 circuit board assembly thereof. Background Art

[0002] In cooking appliances, such as IH electric pressure cookers and rice cookers, a first control circuit for controlling the image output by the display panel and a second control circuit for controlling multiple circuit modules are generally provided. However, in actual design, the first control circuit is generally the main control circuit, and the second control circuit needs to communicate back and forth with the first control circuit in the process of executing part of the work. For example, the second control circuit is currently electrically connected to the fan switch control circuit and the temperature detection circuit. When the second control circuit needs to control the fan switch control circuit to work, it is necessary to first upload the result output by the temperature detection circuit to the first control circuit, and then control the fan switch control circuit to work according to the fan drive instruction issued by the first control circuit. This results in more and more cumbersome communication content between the two control circuits, which increases the complexity and processing time of program processing. Utility Model Content

[0003] The main purpose of the utility model is to provide a cooking appliance circuit board assembly, aiming to reduce the complexity of communication and program processing between two control circuits in the cooking appliance.

[0004] To achieve the above object, the utility model proposes a cooking utensil circuit board assembly, comprising:

[0005] A display driving circuit, wherein the display driving circuit is used to connect to a display panel;

[0006] a first control circuit, the first control circuit being electrically connected to the display driving circuit;

[0007] a second control circuit, wherein the first control circuit is communicatively connected with the second control circuit;

[0008] a temperature sensing circuit; and,

[0009] Fan switch control circuit;

[0010] Wherein, one of the temperature detection circuit and the fan switch control circuit is electrically connected to the first control circuit, and the other is electrically connected to the second control circuit; or,

[0011] The first control circuit is electrically connected to the temperature detection circuit and the fan switch control circuit respectively.

[0012] Optionally, the temperature detection circuit includes a steam temperature detection circuit;

[0013] And / or, the cooking appliance includes an inner pot, and the temperature detection circuit includes an inner pot temperature detection circuit.

[0014] Optionally, the cooking appliance circuit board assembly further comprises:

[0015] A display circuit board, wherein the first control circuit and the display driving circuit are arranged on the display circuit board;

[0016] A control circuit board, wherein the second control circuit is arranged on the control circuit board;

[0017] Wherein, one of the temperature detection circuit and the fan switch control circuit is electrically connected to the first control circuit and disposed on the display circuit board, and the other is electrically connected to the second control circuit and disposed on the control circuit board; or,

[0018] The first control circuit is electrically connected to the temperature detection circuit and the fan switch control circuit respectively, and the temperature detection circuit and the fan switch control circuit are both arranged on the display circuit board.

[0019] Optionally, the cooking appliance circuit board assembly further comprises:

[0020] A switch circuit, wherein a controlled end of the switch circuit is electrically connected to the second control circuit and is configured to be in an open or closed state under the control of the second control circuit.

[0021] Optionally, the cooking appliance circuit board assembly further comprises:

[0022] A switch temperature detection circuit is electrically connected to the second control circuit and is used to detect the temperature of the switch circuit and output a corresponding switch temperature detection signal to the second control circuit.

[0023] Optionally, the cooking appliance circuit board assembly further comprises:

[0024] a working voltage detection circuit, wherein the output end of the working voltage detection circuit is electrically connected to the second control circuit and is used to detect the working voltage of the cooking appliance and output a corresponding voltage detection signal to the second control circuit, and the second control circuit is further used to control the operation of the switch circuit according to the voltage detection signal and output the voltage detection signal to the first control circuit;

[0025] a working current detection circuit, wherein the output end of the working current detection circuit is electrically connected to the second control circuit and is used to detect the working current of the cooking appliance and output a corresponding current detection signal to the second control circuit, and the second control circuit is further used to control the operation of the switch circuit according to the current detection signal and output the current detection signal to the first control circuit;

[0026] Optionally, the cooking appliance circuit board assembly also includes: a protection detection circuit, which is electrically connected to the second control circuit, and is used to detect the working status of the cooking appliance and output a corresponding protection detection signal, and the second control circuit is also used to control the operation of the switch circuit according to the protection detection signal and output the protection detection signal to the first control circuit.

[0027] Optionally, the cooking appliance circuit board assembly further comprises: a power supply voltage zero-crossing detection circuit, the output end of which is electrically connected to the second 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 second control circuit;

[0028] The second control circuit is further configured to control the operation of the switch circuit according to the zero-crossing detection signal and output the zero-crossing detection signal to the first control circuit.

[0029] Optionally, the cooking appliance circuit board assembly further comprises:

[0030] An auxiliary heater switch control circuit, the auxiliary heater switch control circuit is used to connect to the auxiliary heater; the auxiliary heater switch control circuit is electrically connected to the second control circuit, and is used to control the operation of the auxiliary heater under the control of the second control circuit.

[0031] The utility model also provides a cooking utensil, comprising the cooking utensil circuit board assembly as described in any one of the above items.

[0032] Optionally, the cooking utensil includes an IH electric pressure cooker and an IH rice cooker.

[0033] The utility model discloses a cooking appliance and a circuit board assembly thereof, comprising a display driving circuit, a first control circuit, a second control circuit, a temperature detection circuit and a fan switch control circuit, wherein the display driving circuit is used to access a display panel, the first control circuit is electrically connected to the display driving circuit, and the first control circuit is electrically connected to the second control circuit. Among them, one of the temperature detection circuit and the fan switch control circuit is electrically connected to the first control circuit, and the other is electrically connected to the second control circuit; or, the first control circuit is electrically connected to the temperature detection circuit and the fan switch control circuit respectively. In this way, in practical applications, the first control circuit can directly control the fan switch control circuit to work according to the result of temperature detection, or control the fan switch circuit according to the result of temperature detection uploaded by the second control circuit, or output a corresponding control signal to the second control circuit according to the result of temperature detection so that it controls the fan switch control circuit to work, without the need for the two control circuits in the prior art to communicate back and forth to realize the cooking appliance controlling the fan rotation according to the temperature inside it, thereby effectively reducing the complexity of communication and program processing between the two control circuits in the cooking appliance, and improving the speed of program execution. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] 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.

[0035] Figure 1 A schematic diagram of a circuit module of an embodiment of a circuit board assembly for a cooking utensil of the present invention;

[0036] Figure 2 It is a schematic diagram of a circuit module of another embodiment of the cooking utensil circuit board assembly of the utility model;

[0037] Figure 3 A schematic diagram of a circuit module of another embodiment of a circuit board assembly for a cooking utensil of the present invention;

[0038] Figure 4 It is a schematic diagram of a circuit module of another embodiment of a circuit board assembly for a cooking utensil of the present invention;

[0039] Figure 5 This is a schematic diagram of a circuit module of another embodiment of a circuit board assembly for a cooking utensil of the present invention.

[0040] Description of Figure Numbers:

[0041]

[0042] 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

[0043] 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.

[0044] 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.

[0045] In cooking appliances, such as IH electric pressure cookers and rice cookers, a first control circuit for controlling the image output by the display panel and a second control circuit for controlling multiple circuit modules are generally provided. However, in actual design, the first control circuit is generally the main control circuit, and the second control circuit needs to communicate back and forth with the first control circuit in the process of executing part of the work. For example, the second control circuit is currently electrically connected to the fan switch control circuit and the temperature detection circuit. When the second control circuit needs to control the fan switch control circuit to work, it is necessary to first upload the result output by the temperature detection circuit to the first control circuit, and then control the fan switch control circuit to work according to the fan drive instruction issued by the first control circuit. This results in more and more cumbersome communication content between the two control circuits, which increases the complexity and processing time of program processing.

[0046] To this end, the utility model proposes a cooking utensil circuit board assembly, referring to Figure 1 In one embodiment of the present utility model, it includes:

[0047] A display driving circuit 10, the display driving circuit 10 is used to connect to the display panel;

[0048] A first control circuit 20, the first control circuit 20 is electrically connected to the display driving circuit 10;

[0049] The second control circuit 30, the first control circuit 20 is in communication connection with the second control circuit 30;

[0050] a temperature detection circuit 40; and,

[0051] Fan switch control circuit 50;

[0052] Wherein, one of the temperature detection circuit 40 and the fan switch control circuit 50 is electrically connected to the first control circuit 20, and the other is electrically connected to the second control circuit 30; or,

[0053] The first control circuit 20 is electrically connected to the temperature detection circuit 40 and the fan switch control circuit 50 , respectively.

[0054] 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 driving circuit 10 can be implemented by a display driving chip matching the display panel, or by a switch driving circuit composed of multiple switch tubes. The first control circuit 20 and the second control circuit 30 can both be implemented by a main controller, such as an MCU, a DSP (Digital Signal Process, digital signal processing chip), an FPGA (Field Programmable Gate Array, programmable logic gate array chip), etc. The first control circuit 20 can control the display driving circuit 10 to drive the reality panel to display different images according to the received external signal.

[0055] In this embodiment, the temperature detection circuit 40 can be implemented by a voltage-dividing temperature detection circuit 40 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 40 is the temperature detection signal output by the temperature detection circuit 40. 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 40 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.

[0056] In this embodiment, the fan switch control circuit 50 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 50 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 50 can work according to the received fan control signal to drive the fan to rotate at a corresponding speed or be in a stopped working state.

[0057] In the present embodiment, the first control circuit 20 is connected to the second control circuit 30 in communication to realize data transmission between the two. In the first control circuit 20 and the second control circuit 30, in addition to the above-mentioned main controller, a communication module can also be provided, and each communication module can be integrated in the respective main controller or electrically connected to the respective main controller. The communication module can adopt a wired communication module, such as a CAN communication module, an SPI serial port module, an RS485 communication module, etc. The main controller in the first control circuit 20 can be electrically connected to the main controller in the second control circuit 30 through the corresponding communication main connection line through the wired communication module electrically connected to the main controller in the second control circuit 30, so as to realize data transmission between the two. The communication module can also adopt a wireless communication module, such as a Bluetooth communication module, a 4G / 5G communication module, a local area network communication module, a WiFi communication module, etc., so that the first control circuit 20 and the second control circuit 30 establish a communication connection through a wireless communication network, thereby realizing data transmission.

[0058] Optionally, in one embodiment, reference Figure 1 , the temperature detection circuit 40 and the fan switch control circuit 50 can both be electrically connected to the first control circuit 20. Specifically, the first control circuit 20 can directly determine the temperature in the current cooking appliance according to the temperature detection signal fed back by the temperature detection circuit 40, and directly output the corresponding fan control signal to the fan switch control circuit 50 according to the temperature-fan speed mapping table with a threshold value set by the R&D personnel, so as to drive the fan to work. There is no need to return the corresponding fan control signal after receiving the temperature detection result sent by the second control circuit 30 as in the prior art, which effectively reduces the complexity of communication and program processing between the two control circuits in the cooking appliance.

[0059] Optionally, in another embodiment, reference Figure 2 , the temperature detection circuit 40 is electrically connected to the first control circuit 20, and the fan switch control circuit 50 is electrically connected to the second control circuit 30. Specifically, the first control circuit 20 can directly determine the temperature in the current cooking appliance according to the temperature detection signal fed back by the temperature detection circuit 40, and output the corresponding fan control signal to the second control circuit 30 according to the temperature-fan speed mapping table with thresholds set by the R&D personnel, so that the second control circuit 30 controls the fan switch control circuit 50 to work so that the fan works at a speed corresponding to the fan control signal. In this way, compared with the prior art, the second control circuit 30 does not need to output the temperature detection result to the first control circuit 20, thereby effectively reducing the complexity of communication and program processing between the two control circuits in the cooking appliance.

[0060] Similarly, optionally, in another embodiment, reference Figure 3, the temperature detection circuit 40 is electrically connected to the second control circuit 30, and the fan switch control circuit 50 is electrically connected to the first control circuit 20. Specifically, after the second control circuit 30 determines the temperature in the current cooking appliance according to the temperature detection signal fed back by the temperature detection circuit 40, the temperature result can be output to the first control circuit 20 via communication, so that the first control circuit 20 directly outputs the corresponding fan control signal to the fan switch control circuit 50 according to the temperature detection result and the temperature-fan speed mapping table with a threshold value set by the R&D personnel, so as to drive the fan to work. In this way, in actual applications, there is no need for the first control circuit 20 to output the fan control signal to the second control circuit 30, thereby effectively reducing the complexity of communication and program processing between the two control circuits in the cooking appliance.

[0061] The utility model discloses a cooking appliance and a circuit board assembly thereof, comprising a display driving circuit 10, a first control circuit 20, a second control circuit 30, a temperature detection circuit 40 and a fan switch control circuit 50. The display driving circuit 10 is used to access a display panel, the first control circuit 20 is electrically connected to the display driving circuit 10, and the first control circuit 20 is electrically connected to the second control circuit 30. Among them, one of the temperature detection circuit 40 and the fan switch control circuit 50 is electrically connected to the first control circuit 20, and the other is electrically connected to the second control circuit 30; or, the first control circuit 20 is electrically connected to the temperature detection circuit 40 and the fan switch control circuit 50 respectively. In this way, in actual applications, the first control circuit 20 can directly control the operation of the fan switch control circuit 50 according to the result of temperature detection, or control the operation of the fan switch circuit 90 according to the result of temperature detection uploaded by the second control circuit 30, or output a corresponding control signal to the second control circuit 30 according to the result of temperature detection to make it control the operation of the fan switch control circuit 50. There is no need for the two control circuits in the prior art to communicate back and forth to realize the cooking appliance controlling the rotation of the fan according to the temperature inside the cooking appliance, thereby effectively reducing the complexity of communication and program processing between the two control circuits in the cooking appliance and improving the speed of program execution.

[0062] refer to Figure 4 In one embodiment of the present invention, the temperature detection circuit 40 includes a steam temperature detection circuit 42; and / or, the cooking appliance includes an inner pot, and the temperature detection circuit 40 includes an inner pot temperature detection circuit 41.

[0063] In this embodiment, the inner pot temperature detection circuit 41 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 to improve the accuracy of the steam temperature detection.

[0064] Specifically, Figure 4 In the embodiment, the temperature detection circuit 40 includes a steam temperature detection circuit 42 and an inner pot temperature detection circuit 41, and the steam temperature detection circuit 42, the inner pot temperature detection circuit 41, and the fan switch control circuit are all electrically connected to the first control circuit 20. The first control circuit 20 will output a corresponding fan control signal to the fan switch control circuit 50 according to the received inner pot temperature detection circuit 41 and the steam temperature detection circuit 42, for example, according to the steam temperature-inner pot temperature-fan speed mapping table preset by the R&D personnel and the inner pot temperature and steam temperature, the corresponding fan control signal is output, or according to the inner pot temperature and steam temperature, the corresponding fan control signal is output, so that the inner pot temperature is the first preset temperature and the steam temperature is lower than the second preset temperature.

[0065] Similarly, if Figure 3 As shown, the steam temperature detection circuit 42 and / or the inner pot temperature detection circuit 41 are electrically connected to the second control circuit 30, and the first control circuit 20 can also output a corresponding fan control signal to the fan switch control circuit 50 according to the inner pot temperature and / or steam temperature transmitted by the second control circuit 30, so as to drive the fan to work at a corresponding speed according to the same embodiment process as above. In this way, in actual application, the cooking appliance can control the corresponding rotation of the fan according to the temperature of the steam and / or the inner pot therein, so as to ensure the overall safety and working stability of the cooking appliance.

[0066] refer to Figure 5 In one embodiment of the present utility model, the cooking appliance circuit board assembly further includes:

[0067] The display circuit board 100, the first control circuit 20, and the display driving circuit 10 are arranged on the display circuit board 100;

[0068] A control circuit board 200, on which the second control circuit 30 is disposed;

[0069] Wherein, one of the temperature detection circuit 40 and the fan switch control circuit 50 is electrically connected to the first control circuit 20 and disposed on the display circuit board 100, and the other is electrically connected to the second control circuit 30 and disposed on the control circuit board 200; or,

[0070] The first control circuit 20 is electrically connected to the temperature detection circuit 40 and the fan switch control circuit 50 , respectively. The temperature detection circuit 40 and the fan switch control circuit 50 are both disposed on the display circuit board 100 .

[0071] In this embodiment, the display panel and the control panel can be implemented by glass fiber board, copper substrate, aluminum substrate, ceramic substrate, etc., and the types of the panels of the display panel and the control panel can be consistent or inconsistent. When the first control circuit 20 and the second control circuit 30 need to be connected through wired communication, the display circuit board 100 and the control circuit board 200 can be electrically connected through a flexible circuit board, or corresponding plug interfaces are provided on both the display circuit board 100 and the control circuit board 200, and an electrical connection path is established between the two circuit boards through a cable with corresponding connectors at both ends, thereby realizing a wired communication connection between the first control circuit 20 and the second control circuit 30.

[0072] In addition, in one embodiment of the present invention, the cooking appliance circuit board assembly further includes:

[0073] The switch circuit 90 has a controlled end electrically connected to the second control circuit 30 and is configured to be in an open or closed state under the control of the second control circuit 30 .

[0074] In this embodiment, the switch circuit 90 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 second control circuit 30 can control the switch circuit 90 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 90. For example, the input end of the switch circuit 90 is electrically connected to a power management circuit for outputting an operating voltage, and the output end is electrically connected to a heating device. The second control circuit 30 can control the switch circuit 90 to be in an open or closed state to control the heating device to be in a stopped working or working state.

[0075] At the same time, it should be understood that when the switch circuit 90 is working, a large amount of heat will be generated by the multiple switch tubes or switch devices therein. In order to ensure the safety of its operation. In one embodiment of the utility model, the cooking appliance circuit board assembly also includes:

[0076] The switch temperature detection circuit 110 is electrically connected to the second control circuit 30 and is used to detect the temperature of the switch circuit 90 and output a corresponding switch temperature detection signal to the second control circuit 30 .

[0077] In this embodiment, the switch temperature detection circuit 110 can be implemented by using the same device as the inner pot temperature detection circuit 41 and the steam temperature detection circuit 42, and is used to detect the temperature of the switch device in the switch circuit 90 and output the corresponding switch temperature detection signal to the second control circuit 30. The second control circuit 30 can determine the working state of the switch device in the switch circuit 90 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 90 is controlled to stop working to prevent the switch device in the switch circuit 90 from burning out.

[0078] refer to Figure 5 In one embodiment of the present utility model, the cooking appliance circuit board assembly further includes:

[0079] A working voltage detection circuit 60, the output end of which is electrically connected to the second control circuit 30, and is used to detect the working voltage of the cooking appliance and output a corresponding voltage detection signal to the second control circuit 30. The second control circuit 30 is also used to control the switch circuit 90 to work according to the voltage detection signal and output the voltage detection signal to the first control circuit 20;

[0080] The working current detection circuit 70, the output end of the working current detection circuit 70 is electrically connected to the second control circuit 30, and is used to detect the working current of the cooking appliance and output a corresponding current detection signal to the second control circuit 30. The second control circuit 30 is also used to control the operation of the switch circuit 90 according to the current detection signal and output the current detection signal to the first control circuit 20.

[0081] In this embodiment, the working voltage detection circuit 60 can be implemented by a resistor voltage divider circuit, or by a voltage detection chip or a voltage sampling chip. The second 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, or the voltage output to the heating device, according to the voltage detection signal output by the working voltage detection circuit 60, and control the switch circuit 90 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 90 is electrically connected to the power supply end, and the output end is electrically connected to the heating device. It can be seen from the above embodiment that the second control circuit 30 outputs a corresponding switch control signal to the switch circuit 90 according to the received voltage setting signal so that it adjusts the voltage at the power supply end to a voltage corresponding to the voltage setting signal and outputs it to the heating device, such as outputting a PWM signal (switch control signal) with a corresponding duty cycle according to the received voltage setting signal and the preset voltage setting-signal duty cycle. At the same time, the second control circuit 30 will determine the difference between the voltage value actually output by the output end of the switching circuit 90 and the voltage value corresponding to the voltage setting signal based on the voltage detection signal, and adjust the duty cycle of the output switching control signal accordingly, so that the voltage actually output by the output end of the switching circuit 90 to the heating device can have a voltage difference with the voltage value corresponding to the voltage setting signal that is less than a preset voltage difference (set by R&D personnel), thereby improving the stability and reliability of the cooking appliance.

[0082] At the same time, the second control circuit 30 also transmits the voltage detection signal output by the working voltage detection circuit 60 to the first control circuit 20 for monitoring and storage by the first control circuit 20 .

[0083] In this embodiment, the working current detection circuit 70 can be implemented by a shunt composed of a current sensing resistor, a Hall current sensor, etc. The second 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, or the current output to the heating device, according to the current detection signal detected and output by the working current detection circuit 70, so as to control the corresponding circuit to perform the corresponding action. For example, the current working current detection circuit 70 detects the current flowing through the switch circuit 90 and output to the heating device in the above embodiment. When the second control circuit 30 determines that the current is less than the preset alarm current value according to the current detection signal, the switch circuit 90 is controlled to maintain the current working state. If it is determined that the current reaches the preset alarm current value according to the current detection signal, then it is determined that the current working current is overcurrent, and the switch circuit 90 is controlled to be in the open state to prevent the current flowing through the switch circuit 90 from being too large and causing the switch circuit 90 to burn, which effectively improves the stability and reliability of the cooking appliance.

[0084] At the same time, the second control circuit 30 also transmits the current detection signal output by the working current detection circuit 70 to the first control circuit 20 for monitoring and storage by the first control circuit 20 .

[0085] In addition, reference Figure 5 In one embodiment of the utility model, the cooking appliance circuit board assembly further includes: a protection detection circuit 130, which is electrically connected to the second control circuit 30. The protection detection circuit 130 is used to detect the working state of the cooking appliance and output a corresponding protection detection signal. The second control circuit 30 is also used to control the operation of the switch circuit 90 according to the protection detection signal and output the protection detection signal to the first control circuit 20.

[0086] In this embodiment, the protection detection circuit 130 may include a voltage surge detection circuit, a current peak detection circuit, and the like, and a temperature detection circuit 40. Specifically, the protection detection circuit 130 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 by the R&D personnel in the second control circuit 30), the switch circuit 90 is controlled to perform a protection action, such as controlling the switch circuit 90 to be in an open state, thereby protecting the cooking appliance.

[0087] At the same time, the second control circuit 30 also transmits the protection detection signal output by the protection detection circuit 130 to the first control circuit 20 for monitoring and storage by the first control circuit 20 .

[0088] refer to Figure 5 In another embodiment, the cooking appliance circuit board assembly further includes: a power supply voltage zero-crossing detection circuit 80, the output end of which is electrically connected to the second 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 second control circuit 30; the second control circuit 30 is also used to control the operation of the switch circuit 90 according to the zero-crossing detection signal and output the zero-crossing detection signal to the first control circuit 20.

[0089] In this embodiment, the power supply voltage zero-crossing detection circuit 80 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 second 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 90 to work, so that the zero point of the voltage outputted by the switch circuit 90 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.

[0090] At the same time, the second control circuit 30 also transmits the zero-crossing detection signal output by the power supply voltage zero-crossing detection circuit 80 to the first control circuit 20 for monitoring and storage by the first control circuit 20 .

[0091] In addition, reference Figure 5 In one embodiment of the present utility model, the cooking appliance circuit board assembly further includes:

[0092] The auxiliary heater switch control circuit 120 is used to connect the auxiliary heater; the auxiliary heater switch control circuit 120 is electrically connected to the second control circuit 30 and is used to control the operation of the auxiliary heater under the control of the second control circuit 30.

[0093] In this embodiment, the auxiliary heater switch control circuit 120 can be implemented using the same switch device in the above-mentioned fan switch control circuit 50 to power on or off the auxiliary heating device under the control of the second control circuit 30 to start or shut down the auxiliary heater.

[0094] The utility model also provides a cooking utensil, comprising any one of the above cooking utensil circuit board components.

[0095] In this embodiment, the cooking appliance includes an IH electric pressure cooker and an IH rice cooker.

[0096] 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 circuit board assembly, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned cooking appliance circuit board assembly, which will not be described one by one here.

[0097] 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 circuit board assembly, characterized in that: include: A display driving circuit, wherein the display driving circuit is used to connect to a display panel; a first control circuit, the first control circuit being electrically connected to the display driving circuit; a second control circuit, wherein the first control circuit is communicatively connected with the second control circuit; Temperature detection circuit; as well as, Fan switch control circuit; Wherein, one of the temperature detection circuit and the fan switch control circuit is electrically connected to the first control circuit, and the other is electrically connected to the second control circuit; or, The first control circuit is electrically connected to the temperature detection circuit and the fan switch control circuit respectively.

2. The cooking appliance circuit board assembly according to claim 1, wherein: The temperature detection circuit includes a steam temperature detection circuit; And / or, the cooking appliance includes an inner pot, and the temperature detection circuit includes an inner pot temperature detection circuit.

3. The cooking appliance circuit board assembly according to claim 1, wherein: The cooking appliance circuit board assembly further comprises: A display circuit board, wherein the first control circuit and the display driving circuit are arranged on the display circuit board; A control circuit board, wherein the second control circuit is arranged on the control circuit board; Wherein, one of the temperature detection circuit and the fan switch control circuit is electrically connected to the first control circuit and disposed on the display circuit board, and the other is electrically connected to the second control circuit and disposed on the control circuit board; or, The first control circuit is electrically connected to the temperature detection circuit and the fan switch control circuit respectively, and the temperature detection circuit and the fan switch control circuit are both arranged on the display circuit board.

4. The cooking appliance circuit board assembly according to any one of claims 1 to 3, characterized in that: The cooking appliance circuit board assembly further comprises: A switch circuit, wherein a controlled end of the switch circuit is electrically connected to the second control circuit and is configured to be in an open or closed state under the control of the second control circuit.

5. The cooking appliance circuit board assembly according to claim 4, wherein: The cooking appliance circuit board assembly further comprises: A switch temperature detection circuit is electrically connected to the second control circuit and is used to detect the temperature of the switch circuit and output a corresponding switch temperature detection signal to the second control circuit.

6. The cooking appliance circuit board assembly according to claim 4, wherein: The cooking appliance circuit board assembly further comprises: a working voltage detection circuit, wherein the output end of the working voltage detection circuit is electrically connected to the second control circuit and is used to detect the working voltage of the cooking appliance and output a corresponding voltage detection signal to the second control circuit, and the second control circuit is further used to control the operation of the switch circuit according to the voltage detection signal and output the voltage detection signal to the first control circuit; A working current detection circuit, the output end of which is electrically connected to the second control circuit and is used to detect the working current of the cooking appliance and output a corresponding current detection signal to the second control circuit. The second control circuit is also used to control the operation of the switch circuit according to the current detection signal and output the current detection signal to the first control circuit.

7. The cooking appliance circuit board assembly according to claim 4, wherein: The cooking appliance circuit board assembly also includes: a protection detection circuit, which is electrically connected to the second control circuit, and is used to detect the working state of the cooking appliance and output a corresponding protection detection signal. The second control circuit is also used to control the operation of the switch circuit according to the protection detection signal and output the protection detection signal to the first control circuit.

8. The cooking appliance circuit board assembly according to claim 4, wherein: The cooking appliance circuit board assembly further includes: a power supply voltage zero-crossing detection circuit, the output end of which is electrically connected to the second 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 second control circuit; The second control circuit is further configured to control the operation of the switch circuit according to the zero-crossing detection signal and output the zero-crossing detection signal to the first control circuit.

9. The cooking appliance circuit board assembly according to any one of claims 1 to 3, characterized in that: The cooking appliance circuit board assembly further comprises: An auxiliary heater switch control circuit, the auxiliary heater switch control circuit is used to connect to the auxiliary heater; the auxiliary heater switch control circuit is electrically connected to the second control circuit, and is used to control the operation of the auxiliary heater under the control of the second control circuit.

10. A cooking utensil, characterized in that: The cooking appliance circuit board assembly comprises the cooking appliance circuit board assembly as claimed in any one of claims 1 to 9.

11. The cooking device according to claim 10, characterized in that: The cooking utensils include an IH electric pressure cooker and an IH rice cooker.

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