Intelligent oven control circuit

Abstract

The utility model discloses an intelligent oven control circuit, which comprises a switching power supply module, a voltage reduction module, a main control module, an auxiliary control module, a key module, a display module, a relay module, a temperature detection module and an alarm module, the main control module is in communication connection with the auxiliary control module, the key module and the display module are respectively connected with the auxiliary control module, and the relay module, the temperature detection module and the alarm module are respectively connected with the main control module. According to the technical scheme, the temperature detection module is configured to detect the temperature parameter in the oven in real time, the main control module controls the relay module to start and close the heating tube in the oven according to the temperature parameter in the oven, and the main control module outputs an alarm signal to the outside through the alarm module in an emergency. And safety accidents caused by short service life and even damage of devices due to over-high temperature in the oven are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic circuit technical field more specifically, the utility model relates to a kind of intelligent oven control circuit. BACKGROUND

[0002] The oven is a kind of kitchen and bathroom appliance, which is mainly used for high-temperature heating of food inside by using electric heating principle. With the improvement of people's living standards, the use of oven is more and more, and the cooking requirements of various dishes are gradually improved. Because the oven has different baking time for different foods when baking food, some even last for several hours or even longer, the temperature in the oven is very high, and long-term use in high-temperature environment will cause the device to have a shorter life or even be damaged, thereby causing safety accidents. SUMMARY

[0003] To solve the above technical problems, the purpose of the utility model is to provide an intelligent oven control circuit.

[0004] The technical solution adopted by the utility model to solve the problem is:

[0005] An intelligent oven control circuit, comprising a switching power supply module, a voltage reduction module, a main control module, a secondary control module, a key module, a display module, a relay module, a temperature detection module, and an alarm module.

[0006] The switching power supply module is connected to the voltage reduction module, and the main control module, the secondary control module, the key module, the display module, the relay module, the temperature detection module, and the alarm module are respectively connected to one of the switching power supply module and the voltage reduction module.

[0007] The main control module is in communication connection with the secondary control module, the key module and the display module are respectively connected to the secondary control module, and the relay module, the temperature detection module, and the alarm module are respectively connected to the main control module.

[0008] As a further improvement of the above technical solution, the temperature detection module comprises a temperature sensor, a resistor R1, a resistor R2, a capacitor C1, and a capacitor C2. The output end of the temperature sensor is connected to the main control module through the resistor R2. One end of the resistor R1 is connected to the connection point of the temperature sensor and the resistor R2, and the other end of the resistor R1 is connected to the ground. The capacitor C1 is connected in parallel with the resistor R1. One end of the capacitor C2 is connected to the connection point of the resistor R2 and the main control module, and the other end of the capacitor C2 is connected to the ground.

[0009] As a further improvement of the above technical solution, the relay module comprises a driving chip of ULN2003 type and a plurality of relays, the plurality of output terminals of the main control module are connected to the plurality of input terminals of the driving chip one by one, and the plurality of output terminals of the driving chip are connected to the control terminals of the plurality of relays one by one.

[0010] As a further improvement of the above technical solution, the control system further comprises a door signal detection module connected to the main control module.

[0011] As a further improvement of the above technical solution, the door signal detection module comprises a door sensor, resistors R3, R4, R5 and a transistor Q1, the output terminal of the door sensor is connected to the base of the transistor Q1 through the resistor R4, the emitter of the transistor Q1 is connected to the ground terminal, the two ends of the resistor R5 are connected to the emitter and the base of the transistor Q1 one by one, the collector of the transistor Q1 is connected to the power supply terminal through the resistor R3, and the collector of the transistor Q1 is connected to the main control module.

[0012] As a further improvement of the above technical solution, the display module comprises a display chip of TM1640 type and an LED display screen, the secondary control module is connected to the display chip through a serial communication interface, and the display chip is connected to the LED display screen.

[0013] As a further improvement of the above technical solution, the switching power supply module comprises a commercial power input terminal, an EMI filter, a rectifier, an input filter, a transformer, an output filter, resistors R6, R7, R8, R9, R10, R11, R12, capacitors C3, C4, C5, C6, diodes D1, D2, D3, D4, D5, a power supply chip of SP6600HPS type and an optical coupler, the transformer is provided with a first winding T1, a second winding T2 and a third winding T3, and the power supply chip is provided with a power connection terminal, a driving terminal, a feedback terminal and a sampling terminal.

[0014] The mains input end is connected with the EMI filter, the EMI filter is connected with the rectifier, the rectifier is connected with the input filter, the input filter is connected with one end of the first winding T1 and one end of the capacitor C3 respectively, the other end of the first winding T1 is connected with the positive electrode of the diode D1 and the driving end of the power supply chip respectively, the negative electrode of the diode D1 is connected with the other end of the capacitor C3 through the resistor R6, one end of the second winding T2 is connected with the positive electrode of the diode D2, the other end of the second winding T2 is connected with the ground end, the negative electrode of the diode D2 is connected with the output filter, the positive electrode of the diode D2 is connected with the negative electrode of the diode D2 through the capacitor C4 and the resistor R7 in sequence, the negative electrode of the diode D2 is connected with the negative electrode of the diode D3 through the resistor R8 and the resistor R9 in sequence, the positive electrode of the diode D3 is connected with the ground end, the anode of the photoelectric coupler is connected at the connection point of the resistor R8 and the resistor R9, the cathode of the photoelectric coupler is connected with the negative electrode of the diode D3, the emitter of the photoelectric coupler is connected with the ground end, the collector of the photoelectric coupler is connected with the feedback end of the power supply chip, the capacitor C5 is connected with the collector and the emitter of the photoelectric coupler in one-to-one correspondence, the positive electrode of the diode D4 is connected with the emitter of the photoelectric coupler, the negative electrode of the diode D4 is connected with the collector of the photoelectric coupler, the sampling end of the power supply chip is connected with the ground end through the resistor R10, one end of the third winding T3 is connected with the ground end, the other end of the third winding T3 is connected with the positive electrode of the diode D5, the negative electrode of the diode D5 is connected with the ground end through the resistor R11, the resistor R12 and the capacitor C6 in sequence, and the power supply chip is connected at the connection point of the resistor R12 and the capacitor C6.

[0015] As a further improvement of the above technical solution, the step-down module comprises a step-down chip of model PL8310, an inductor L1, a resistor R13, a resistor R14, a resistor R15, a capacitor C7, a capacitor C8 and a capacitor C9, and the step-down chip is configured with a power connection end, a sampling end, a bootstrap end, a driving end and a feedback end.

[0016] The negative electrode of the diode D2 is connected with the power connection end of the voltage reduction chip, the sampling end of the voltage reduction chip is connected with the ground end, the bootstrap end of the voltage reduction chip is connected with the driving end of the voltage reduction chip through the resistor R13 and the capacitor C7 in sequence, the driving end of the voltage reduction chip is connected with the ground end through the inductor L1, the resistor R14 and the resistor R15 in sequence, the capacitor C8 is connected with the resistor R14 in parallel, the feedback end of the voltage reduction chip is connected at the connecting point of the resistor R14 and the resistor R15, one end of the capacitor C9 is connected at the connecting point of the inductor L1 and the resistor R14, and the other end of the capacitor C9 is connected with the ground end.

[0017] The oven in the technical scheme is provided with a temperature detection module for real-time detection of temperature parameters in the oven, and a main control module controls a relay module to start and stop a heating tube in the oven according to the temperature parameters in the oven, and the main control module outputs an alarm signal to the outside through an alarm module in an emergency, so that the temperature in the oven is prevented from being too high to shorten the service life of devices or even damage the devices, thereby causing a safety accident. BRIEF DESCRIPTION OF DRAWINGS

[0018] The utility model is further explained and described below in combination with the description of the drawings and the specific embodiment.

[0019] Figure 1 is the circuit module frame diagram of the utility model;

[0020] Figure 2 is the circuit diagram of the temperature detection module in the utility model;

[0021] Figure 3 is the circuit diagram of the door signal detection module in the utility model;

[0022] Figure 4 is the circuit diagram of the relay module in the utility model;

[0023] Figure 5 is the circuit diagram of the display module and the key module in the utility model;

[0024] Figure 6 is the circuit diagram of the switching power supply module in the utility model;

[0025] Figure 7 is the circuit diagram of the voltage reduction module in the utility model. SPECIFIC EMBODIMENT

[0026] The detailed embodiments of the present application will be described in this part, and the preferred embodiments of the present application are shown in the drawings, the drawings are used to supplement the description of the text part, so that people can intuitively and visually understand each technical feature and the overall technical scheme of the present application, but it cannot be understood as a limitation on the protection scope of the present application.

[0027] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right and the like, is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element indicated must have a specific orientation, be constructed and operated in a specific orientation, therefore it cannot be understood as a limitation on the present application.

[0028] In the description of the present application, the meaning of several is one or more, the meaning of multiple is more than two, greater than, less than, more than and the like are not included in the number, above, below, within and the like are included in the number. If it is described as first, second, it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0029] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting and the like should be understood in a broad sense, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application according to the specific content of the technical scheme.

[0030] Referring to Figures 1 to 7 , the application discloses a kind of intelligent oven control circuit, its first embodiment includes switching power supply module, voltage reduction module, main control module, auxiliary control module, key module, display module, relay module, temperature detection module and alarm module;

[0031] The switching power supply module is connected with the voltage reduction module, the main control module, the auxiliary control module, the key module, the display module, the relay module, the temperature detection module and the alarm module are respectively selected one of the switching power supply module and the voltage reduction module is connected;

[0032] The main control module is connected with the auxiliary control module, the key module and the display module are respectively connected with the auxiliary control module, the relay module, the temperature detection module and the alarm module are respectively connected with the main control module.

[0033] Specifically, the temperature detection module in the embodiment is configured to detect the temperature parameter in the oven in real time, the main control module controls the relay module to start and stop the heating tube in the oven according to the temperature parameter in the oven, and the main control module outputs an alarm signal to the outside through the alarm module in an emergency, so as to avoid the temperature in the oven being too high, which shortens the service life of the device or even damages the device, thereby causing a safety accident.

[0034] Further as a preferred embodiment, the temperature detection module in the embodiment includes a temperature sensor, a resistor R1, a resistor R2, a capacitor C1 and a capacitor C2, the output end of the temperature sensor is connected with the main control module through the resistor R2, one end of the resistor R1 is connected with the temperature sensor and the resistor R2, the other end of the resistor R1 is connected with the ground end, the capacitor C1 is connected with the resistor R1 in parallel, one end of the capacitor C2 is connected with the connection point of the resistor R2 and the main control module, and the other end of the capacitor C2 is connected with the ground end.

[0035] Further as a preferred embodiment, the relay module in the embodiment includes a driving chip with a model of ULN2003 and a plurality of relays, the plurality of output ends of the main control module are connected with the plurality of input ends of the driving chip one by one, and the plurality of output ends of the driving chip are connected with the control ends of the plurality of relays one by one. Each relay in the relay module in the embodiment controls the connection of each heating tube in the oven and the power input end one by one.

[0036] Further as a preferred embodiment, the embodiment further includes a door signal detection module, and the door signal detection module is connected with the main control module.

[0037] In the embodiment, the door signal detection module includes a door sensor, a resistor R3, a resistor R4, a resistor R5 and a triode Q1, the output end of the door sensor is connected with the base of the triode Q1 through the resistor R4, the emitter of the triode Q1 is connected with the ground end, the two ends of the resistor R5 are connected with the emitter and the base of the triode Q1 one by one, the collector of the triode Q1 is connected with the power supply end through the resistor R3, and the collector of the triode Q1 is connected with the main control module.

[0038] Further as a preferred embodiment, the display module in the embodiment includes a display chip with a model of TM1640 and an LED display screen, the secondary control module is connected with the display chip through a serial communication interface, and the display chip is connected with the LED display screen.

[0039] Further as preferred implementation, in the embodiment, the switching power supply module is used for converting AC mains into 12V DC voltage, the switching power supply module comprises a mains input, an EMI filter, a rectifier, an input filter, a transformer, an output filter, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a diode D1, a diode D2, a diode D3, a diode D4, a diode D5, a power supply chip of SP6600HPS type and an opto-coupler, the transformer is configured with a first winding T1, a second winding T2 and a third winding T3, and the power supply chip is configured with a power input, a driving end, a feedback end and a sampling end;

[0040] The mains input is connected with the EMI filter, the EMI filter is connected with the rectifier, the rectifier is connected with the input filter, one end of the first winding T1 and one end of the capacitor C3 are connected with the input filter respectively, the other end of the first winding T1 is connected with the positive electrode of the diode D1 and the driving end of the power supply chip respectively, the negative electrode of the diode D1 is connected with the other end of the capacitor C3 through the resistor R6, one end of the second winding T2 is connected with the positive electrode of the diode D2, the other end of the second winding T2 is connected with the ground, the negative electrode of the diode D2 is connected with the output filter, the positive electrode of the diode D2 is connected with the negative electrode of the diode D2 through the capacitor C4 and the resistor R7 in sequence, the negative electrode of the diode D2 is connected with the negative electrode of the diode D3 through the resistor R8 and the resistor R9 in sequence, the positive electrode of the diode D3 is connected with the ground, the anode of the opto-coupler is connected at the connection point of the resistor R8 and the resistor R9, the cathode of the opto-coupler is connected with the negative electrode of the diode D3, the emitter of the opto-coupler is connected with the ground, the collector of the opto-coupler is connected with the feedback end of the power supply chip, the capacitor C5 is connected with the collector and the emitter of the opto-coupler in one-to-one correspondence, the positive electrode of the diode D4 is connected with the emitter of the opto-coupler, the negative electrode of the diode D4 is connected with the collector of the opto-coupler, the sampling end of the power supply chip is connected with the ground through the resistor R10, one end of the third winding T3 is connected with the ground, the other end of the third winding T3 is connected with the positive electrode of the diode D5, the negative electrode of the diode D5 is connected with the ground through the resistor R11, the resistor R12 and the capacitor C6 in sequence, and the power input of the power supply chip is connected at the connection point of the resistor R12 and the capacitor C6.

[0041] As a further preferred embodiment, in this embodiment, the voltage reduction module is used to convert 12V DC voltage output by the switching power supply module into 5V DC voltage, and the voltage reduction module comprises a voltage reduction chip of model PL8310, an inductor L1, a resistor R13, a resistor R14, a resistor R15, a capacitor C7, a capacitor C8 and a capacitor C9, the voltage reduction chip is configured with a power connection end, a sampling end, a bootstrap end, a driving end and a feedback end;

[0042] The negative electrode of the diode D2 is connected with the power connection end of the voltage reduction chip, the sampling end of the voltage reduction chip is connected with the ground end, the bootstrap end of the voltage reduction chip is connected with the driving end of the voltage reduction chip through the resistor R13 and the capacitor C7 in sequence, the driving end of the voltage reduction chip is connected with the ground end through the inductor L1, the resistor R14 and the resistor R15 in sequence, the capacitor C8 is connected with the resistor R14 in parallel, the feedback end of the voltage reduction chip is connected at the connection point of the resistor R14 and the resistor R15, one end of the capacitor C9 is connected at the connection point of the inductor L1 and the resistor R14, and the other end of the capacitor C9 is connected with the ground end.

[0043] The above is only the preferred embodiment of the present application, and does not limit the patent range of the present application, and any equivalent structural transformation, direct or indirect application in other related technical fields within the concept of the present application, using the content of the present application specification and drawings, are included in the patent protection range of the present application.

Claims

1. An intelligent oven control circuit, characterized by: The switching power module, the voltage reduction module, the main control module, the auxiliary control module, the key module, the display module, the relay module, the temperature detection module and the alarm module are included. The switching power module is connected with the voltage reduction module, and the main control module, the auxiliary control module, the key module, the display module, the relay module, the temperature detection module and the alarm module are respectively connected with one of the switching power module and the voltage reduction module. The main control module is in communication connection with the auxiliary control module, the key module and the display module are respectively connected with the auxiliary control module, and the relay module, the temperature detection module and the alarm module are respectively connected with the main control module.

2. The intelligent oven control circuit of claim 1, wherein: The temperature detection module includes a temperature sensor, a resistor R1, a resistor R2, a capacitor C1 and a capacitor C2, the output end of the temperature sensor is connected with the main control module through the resistor R2, one end of the resistor R1 is connected with the temperature sensor and the resistor R2, the other end of the resistor R1 is connected with the ground end, the capacitor C1 is connected with the resistor R1 in parallel, one end of the capacitor C2 is connected with the connection point of the resistor R2 and the main control module, and the other end of the capacitor C2 is connected with the ground end.

3. The intelligent oven control circuit of claim 1, wherein: The relay module includes a driving chip with a model of ULN2003 and a plurality of relays, a plurality of output ends of the main control module are connected with a plurality of input ends of the driving chip in one-to-one correspondence, and a plurality of output ends of the driving chip are connected with control ends of a plurality of the relays in one-to-one correspondence.

4. The intelligent oven control circuit of claim 1, wherein: A door signal detection module is further included, and the door signal detection module is connected with the main control module.

5. The intelligent oven control circuit of claim 4, wherein: The door signal detection module includes a door sensor, a resistor R3, a resistor R4, a resistor R5 and a triode Q1, the output end of the door sensor is connected with the base of the triode Q1 through the resistor R4, the emitter of the triode Q1 is connected with the ground end, the two ends of the resistor R5 are connected with the emitter and the base of the triode Q1 in one-to-one correspondence, the collector of the triode Q1 is connected with the power supply end through the resistor R3, and the collector of the triode Q1 is connected with the main control module.

6. The intelligent oven control circuit of claim 1, wherein: The display module includes a display chip with a model of TM1640 and an LED display screen, the auxiliary control module is connected with the display chip through a serial communication interface, and the display chip is connected with the LED display screen.

7. The intelligent oven control circuit of claim 1, wherein: The switching power module includes a commercial power input end, an EMI filter, a rectifier, an input filter, a transformer, an output filter, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a diode D1, a diode D2, a diode D3, a diode D4, a diode D5, a power supply chip and an optical coupler, the transformer is provided with a first winding T1, a second winding T2 and a third winding T3, and the power supply chip is provided with a power connection end, a driving end, a feedback end and a sampling end. The mains input end is connected with the EMI filter, the EMI filter is connected with the rectifier, the rectifier is connected with the input filter, the input filter is connected with one end of the first winding T1 and one end of the capacitor C3 respectively, the other end of the first winding T1 is connected with the positive electrode of the diode D1 and the driving end of the power supply chip respectively, the negative electrode of the diode D1 is connected with the other end of the capacitor C3 through the resistor R6, one end of the second winding T2 is connected with the positive electrode of the diode D2, the other end of the second winding T2 is connected with the ground end, the negative electrode of the diode D2 is connected with the output filter, the positive electrode of the diode D2 is connected with the negative electrode of the diode D2 through the capacitor C4 and the resistor R7 in sequence, the negative electrode of the diode D2 is connected with the negative electrode of the diode D3 through the resistor R8 and the resistor R9 in sequence, the positive electrode of the diode D3 is connected with the ground end, the anode of the photoelectric coupler is connected at the connection point of the resistor R8 and the resistor R9, the cathode of the photoelectric coupler is connected with the negative electrode of the diode D3, the emitter of the photoelectric coupler is connected with the ground end, the collector of the photoelectric coupler is connected with the feedback end of the power supply chip, the capacitor C5 is connected with the collector and the emitter of the photoelectric coupler in one-to-one correspondence, the positive electrode of the diode D4 is connected with the emitter of the photoelectric coupler, the negative electrode of the diode D4 is connected with the collector of the photoelectric coupler, the sampling end of the power supply chip is connected with the ground end through the resistor R10, one end of the third winding T3 is connected with the ground end, the other end of the third winding T3 is connected with the positive electrode of the diode D5, the negative electrode of the diode D5 is connected with the ground end through the resistor R11, the resistor R12 and the capacitor C6 in sequence, and the power supply chip is connected at the connection point of the resistor R12 and the capacitor C6.

8. The intelligent oven control circuit of claim 7, wherein: The voltage reduction module comprises a voltage reduction chip, an inductor L1, a resistor R13, a resistor R14, a resistor R15, a capacitor C7, a capacitor C8 and a capacitor C9, and the voltage reduction chip is configured with a power connection end, a sampling end, a bootstrap end, a driving end and a feedback end. The negative electrode of the diode D2 is connected with the power connection end of the voltage reduction chip, the sampling end of the voltage reduction chip is connected with the ground end, the bootstrap end of the voltage reduction chip is connected with the driving end of the voltage reduction chip through the resistor R13 and the capacitor C7 in sequence, the driving end of the voltage reduction chip is connected with the ground end through the inductor L1, the resistor R14 and the resistor R15 in sequence, the capacitor C8 is connected with the resistor R14 in parallel, the feedback end of the voltage reduction chip is connected at the connection point of the resistor R14 and the resistor R15, one end of the capacitor C9 is connected at the connection point of the inductor L1 and the resistor R14, and the other end of the capacitor C9 is connected with the ground end.

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