Health pot control circuit

Abstract

The utility model particularly relates to a health maintenance kettle control circuit, which comprises a power supply circuit, a control chip IC1 and a key group, the power supply circuit supplies power to the control chip IC1, the control chip IC1 is connected with the key group, the control chip IC1 is connected with a water level detection circuit, the water level detection circuit comprises a water level detection chip IC2, a pin 8 of the water level detection chip IC2 is connected with the power supply circuit, and a pin 8 of the water level detection chip IC2 is connected with the key group. A pin 6 of the water level detection chip IC2 is connected to a pin 15 of the control chip IC1, a pin 5 of the water level detection chip IC2 is connected with a liquid detection end, and the power supply circuit supplies power to a pin 8 of the water level detection chip IC2. The utility model has the beneficial effects that the circuit is connected with the water level detection circuit through the control chip IC1, so that one more water level detection function can be realized, the dry burning prevention effect is achieved, and the safety is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a health preserving pot control circuit. BACKGROUND

[0002] The health preserving pot is a small household appliance that can be used for health preservation and cooking various food materials, similar to an electric kettle, but has breakthroughs in functions and is not limited to boiling water. The health preserving pot is similar to the electric kettle in shape, structure, and capacity. The health preserving pot has a higher value in appearance and is mainly different from the electric kettle in that the health preserving pot is larger. In terms of structure, both the health preserving pot and the electric kettle are composed of a temperature controller, a heating disc, a pot body, and a pot cover. The health preserving pot body is made of high borosilicate glass and is melted at a temperature above 1600 degrees. The main raw materials are boron and silicon and do not contain any heavy metal additives. The health preserving pot has the characteristics of high temperature resistance, rapid cooling and heating resistance, acid and alkali resistance, and stable quality and does not produce any chemical changes and harmful substances, which provides protection for your health. The capacity of the health preserving pot is divided into 1.2L, 1.5L, 1.8L, and 2.0L, which is suitable for different families. In terms of functions, the general cooking functions of the health preserving pot are boiling water, desserts, soup, noodles, porridge, tea, hot pot, and medicinal food, etc. The health preserving pot with simple functions generally has only six cooking functions, and the health preserving pot with multiple functions has 20 cooking functions. In addition, the health preserving pot generally has a reservation and timing function, and the specific reservation / timing time is subject to the product. In terms of operation, the health preserving pots on the market at present are mostly one of the following two operations: touch key type and rotary knob and key type. The design of both is to save the operation time of consumers and provide more convenience, and the selection is based on personal preferences. The function display panel of the health preserving pot generally adopts tempered glass, which has high hardness, is resistant to scratching, easy to clean, and good in waterproof function.

[0003] The utility model discloses a multifunctional precise temperature control health pot control circuit, and the structure circuit is as follows: including power supply part, zero -crossing detection part, power control part, temperature detection part, display part, singlechip and function operation part, the singlechip and function operation part including singlechip main control chip, porcelain chip capacitor, four buttons, the power supply part includes current -limiting resistor, power unit, zero -crossing detection part includes fuse, diode, resistance, resistance, triode, and power control part includes resistance, thyristor, and commercial power ACN is divided into three ways: first road is connected to the port of health pot heating pipe, and the second road is converted into direct current for the whole control circuit power supply after flowing through power unit through current -limiting resistor, and the third road flows into zero -crossing detection part, and ACL terminal is connected to the emitter of triode through fuse, resistance, is connected to the negative pole of diode through fuse, is connected to the anode of thyristor through fuse, and commercial power ACN is connected to the base of triode through resistance, and the anode of thyristor is connected with resistance, and the cathode is connected with the heating wire interface of health pot heating pipe, and the emitter of triode is connected to the P0.2 pin of singlechip through node, and the other end of resistance is connected with the P0.1 pin of singlechip, the temperature detection part includes the thermistor that is installed in the health pot body chassis, and the thermistor is connected with circuit board through connector, and one end of thermistor is connected with + 5V power supply through resistance, and the other end is grounded, and the midpoint voltage of both is determined by the resistance ratio of thermistor resistance and resistance, and this voltage is connected to the AD mouth of singlechip after filtering through porcelain chip capacitor and resistance, and + 5V power supply is also connected with buzzer, and the other end of buzzer is connected with the negative pole of electrolytic capacitor, and the positive pole of electrolytic capacitor is connected with resistance through node and is connected to the P2.0 pin of singlechip, the display part includes 74HC164 chip, resistance, LED lamp, nixie tube, the VDD pin and GND pin of singlechip main control chip are connected with porcelain chip capacitor, the P2.2, P1.1, P1.3, P1.5 pins of singlechip main control chip are connected with a button respectively, and singlechip main control chip is as the main control element and scans the button to judge the time of user reservation, selected working mode, controls 74HC164 chip and the corresponding LED lamp of lighting indicates the mode selected by user, and controls nixie tube and corresponding display remaining time or specific code, when the reservation time reaches, according to corresponding working mode and health pot in -pot temperature situation, control thyristor to work with corresponding working mode. Health pot is also usually equipped with precise temperature controller, is used for accurately measuring water temperature when normal water heating, and automatically switches to the temperature -holding mode when water temperature reaches 100 degrees. However, even if there are these protective measures, the dry -burning function can also be ineffective if the temperature control element fails. SUMMARY

[0004] The utility model aims at solving one of the prior art technical problems. For this purpose, one object of the utility model lies in providing a health preserving pot control circuit which can detect water level function and prevent dry burning and improve safety.

[0005] According to the health preserving pot control circuit, the power supply circuit supplies power to the control chip IC1, the control chip IC1 is connected with the key group, the control chip IC1 is connected with the water level detection circuit, the water level detection circuit comprises a water level detection chip IC2, the 8th pin of the water level detection chip IC2 is connected on the power supply circuit, the 6th pin of the water level detection chip IC2 is connected on the 15th pin of the control chip IC1, the 5th pin of the water level detection chip IC2 is connected with a liquid detection end, and the power supply circuit supplies power to the 8th pin of the water level detection chip IC2.

[0006] Specifically further, the 5th pin of the water level detection chip IC2 is connected with the liquid detection end through the tenth resistor R10, the 6th pin of the water level detection chip IC2 is connected with the ninth resistor R9, the 8th pin of the water level detection chip IC2 is further connected with the fourth capacitor C4, the other end of the fourth capacitor C4 is connected with the ground end GND, the 2nd pin of the water level detection chip IC2 is further connected with the third capacitor C3, the 3rd pin of the water level detection chip IC2 is further connected with the seventh capacitor C7, the 4th pin of the water level detection chip IC2 is further connected with the sixth capacitor C6, and the sixth capacitor C6 is connected with the fifth capacitor C5.

[0007] Specifically further, the 11th pin of the control chip IC1 is connected with the connector JP1, and the 6th pin of the water level detection chip IC2 is connected with the 1st pin of the connector JP1.

[0008] Specifically further, the control chip IC1 is connected with a three-digit nixie tube SEG1.

[0009] Specifically further, the control chip IC1 is connected with an alarm circuit, the alarm circuit comprises a temperature sensor connector NTC1, a temperature sensor, a buzzer BUZ1, a first capacitor C1, a second capacitor C2, a seventh resistor R7, an eighth resistor R8 and a BUZ+NTC end, the temperature sensor connector NTC1 and the temperature sensor are connected, the 1st pin and the 2nd pin of the temperature sensor connector NTC1 are connected with the first capacitor C1, the 2nd pin of the temperature sensor connector NTC1 is further connected with the seventh resistor R7 and the eighth resistor R8, the eighth resistor R8 is connected with the BUZ+NTC end and the second capacitor C2 respectively, the second capacitor C2 is connected with the buzzer BUZ1, and the BUZ+NTC end is connected with the 9th pin of the control chip IC1.

[0010] Specific further, the power supply circuit includes buck chip U1, ACL1 end, ACN1 end and COM1 end, ACL1 end is connected to 4 feet and 5 feet of buck chip U1 respectively, the 2 feet of buck chip U1 is connected with first inductance L1, first inductance L1 is connected to +5V end, the 6 feet of buck chip U1 is connected with ACN1 end and COM1 end respectively, the common end between the 6 feet of buck chip U1 and ACN1 end is connected with fifth resistance R5, fifth resistance R5 is connected with sixth resistance R6, one end of sixth resistance R6 is connected to 12 feet of control chip IC1.

[0011] Specific further, the key group includes first key KEY1, second key KEY2, third key KEY3 and fourth key KEY4, first key KEY1, second key KEY2, third key KEY3 and fourth key KEY4 are connected to control chip IC1 respectively.

[0012] Specific further, the 7 feet and 8 feet of control chip IC1 are connected with third capacitor C3 in parallel.

[0013] Specific further, the 5 feet of water level detection chip IC2 and liquid detection end are connected through bidirectional thyristor tube Q1, the 3 feet of thyristor tube Q1 is connected with fourth resistance R4, fourth resistance R4 is connected with the 15 feet of control chip IC1, the 2 feet of thyristor tube Q1 is connected with +5V end.

[0014] The beneficial effect of the utility model is: this circuit is connected with water level detection circuit through control chip IC1, can detect water level function, plays the role of preventing dry burning and promotes security. ACCOUT OF DRAWINGS

[0015] The above and / or additional aspects and advantages of the utility model will become apparent and more readily appreciated from the following description of the embodiments, with reference to the following drawings.

[0016] Figure 1 It is the power supply circuit diagram of the utility model.

[0017] Figure 2 It is the control chip IC1 schematic diagram of the utility model.

[0018] Figure 3 It is the key group schematic diagram.

[0019] Figure 4 It is the joint schematic diagram.

[0020] Figure 5 It is the three digit nixie tube SEG1 schematic diagram.

[0021] Figure 6 It is the warning circuit diagram.

[0022] Figure 7 is a water level detection circuit diagram.

[0023] As shown in the following reference numerals: power supply circuit 100, key group 200, warning circuit 300, water level detection circuit 400. DETAILED DESCRIPTION

[0024] The embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only, and are for the purpose of explanation of the present application, and are not to be understood as a limitation of the present application.

[0025] The following refers to Figures 1 to 3 A health preserving pot control circuit according to an embodiment of the present application is described below, which comprises a power supply circuit 100, a control chip IC1 and a key group 200, the power supply circuit 100 supplies power to the control chip IC1, the control chip IC1 is connected with the key group 200, the control chip IC1 is connected with a water level detection circuit 400, the water level detection circuit 400 comprises a water level detection chip IC2, the 8-pin of the water level detection chip IC2 is connected to the power supply circuit 100, the 6-pin of the water level detection chip IC2 is connected to the 15-pin of the control chip IC1, the 5-pin of the water level detection chip IC2 is connected with a liquid detection end, and the power supply circuit 100 supplies power to the 8-pin of the water level detection chip IC2. The circuit is connected with the water level detection circuit through the control chip IC1, and can detect the water level function, which plays a role in preventing dry burning and improving safety. In addition, the key group 200 inputs operation instructions to the control chip IC1.

[0026] The 5-pin of the water level detection chip IC2 in the circuit is connected with the liquid detection end through the tenth resistor R10, the 6-pin of the water level detection chip IC2 is connected with the ninth resistor R9, the 8-pin of the water level detection chip IC2 is further connected with the fourth capacitor C4, the other end of the fourth capacitor C4 is connected with the ground end GND, the 2-pin of the water level detection chip IC2 is further connected with the third capacitor C3, the 3-pin of the water level detection chip IC2 is further connected with the seventh capacitor C7, the 4-pin of the water level detection chip IC2 is further connected with the sixth capacitor C6, and the sixth capacitor C6 is connected with the fifth capacitor C5. The 11-pin of the control chip IC1 in the circuit is connected with the connector JP1, and the 6-pin of the water level detection chip IC2 is connected with the 1-pin of the connector JP1.

[0027] The control chip IC1 of the circuit is connected with three digit tubes SEG1. The white display of the three digit tubes SEG1, such as 000, can display minutes, temperature, and reservation state; 1) time display: according to different functions, the time is displayed as minutes; for example, the three digit tubes SEG1 display 120, which means 120 minutes; 2) temperature display: 0℃-100℃, the display mode is 0℃-99℃, and only 100 is displayed when it is greater than or equal to 100℃, and 0℃ is displayed when it is lower than 0℃ (note: the temperature "C" on the three digit tubes SEG1 is in capital letters); 3) standby state display: the "on / standby" key indicator light is always on, and the three digit tubes SEG1 display "---".

[0028] The control chip IC1 of the circuit is connected with a warning circuit 300, which includes a temperature sensor connector NTC1, a temperature sensor, a buzzer BUZ1, a first capacitor C1, a second capacitor C2, a seventh resistor R7, an eighth resistor R8, and a BUZ+NTC terminal. The temperature sensor connector NTC1 is connected with the temperature sensor, the 1 pin and the 2 pin of the temperature sensor connector NTC1 are connected with the first capacitor C1, the 2 pin of the temperature sensor connector NTC1 is also connected with the seventh resistor R7 and the eighth resistor R8, the eighth resistor R8 is connected with the BUZ+NTC terminal and the second capacitor C2 respectively, the second capacitor C2 is connected with the buzzer BUZ1, and the BUZ+NTC terminal is connected with the 9 pin of the control chip IC1.

[0029] The warning circuit 300 has the following power-on prompt sounds: when powered on, the buzzer BUZ1 will "beep" once, and the sound lasts about 0.3 seconds. 2) completion indication sound: the buzzer BUZ1 will "beep" three times and stop for 1 second (each sound lasts 0.1 seconds), and then "beep" three times; there is no completion prompt sound for the heat preservation function; 3) each time an effective key is pressed, the buzzer BUZ1 will "beep" once, and the sound lasts 0.1 seconds; 4) the buzzer BUZ1 will "beep" three times, and the sound lasts about 0.3 seconds, with 1 second interval between each sound.

[0030] The power supply circuit 100 includes a step-down chip U1, ACL1 end, ACN1 end and COM1 end, the ACL1 end is connected to the 4th pin and the 5th pin of the step-down chip U1 respectively, the 2nd pin of the step-down chip U1 is connected with the first inductor L1, the first inductor L1 is connected to the +5V end, the 6th pin of the step-down chip U1 is connected with the ACN1 end and the COM1 end respectively, the common end between the 6th pin of the step-down chip U1 and the ACN1 end is connected with the fifth resistor R5, the fifth resistor R5 is connected with the sixth resistor R6, one end of the sixth resistor R6 is connected to the 12th pin of the control chip IC1. The power supply circuit 100 outputs +5V voltage, and supplies power to the 8th pin of the control chip IC1, the 1st pin of the thyristor Q1, the 3rd pin of the joint JP1, one end of the seventh resistor R7 of the warning circuit 300 and the 5th pin of the water level detection chip IC2 on the water level detection circuit 400 respectively.

[0031] The key group 200 includes the first key KEY1, the second key KEY2, the third key KEY3 and the fourth key KEY4, which are connected to the control chip IC1 respectively.

[0032] The 7th pin and the 8th pin of the control chip IC1 are connected in parallel with the third capacitor C3. The 5th pin of the water level detection chip IC2 is connected with the liquid detection end through the bidirectional thyristor Q1, the 3rd pin of the thyristor Q1 is connected with the fourth resistor R4, the fourth resistor R4 is connected with the 15th pin of the control chip IC1, and the 2nd pin of the thyristor Q1 is connected with the +5V end.

[0033] The working process of the circuit is described in sequence:

[0034] I. Power on: plug in the power plug, the power supply circuit 100 is in the power-on state, put the kettle body on the base, the warning circuit 300 on the base sends a power-on prompt sound, the LED function indicator light and the three-digit nixie tube SEG1 are fully bright for 1 second, and then the product enters standby state, the three-digit nixie tube SEG1 displays "----".

[0035] II. Press the "function" key of the key group 200 to select the required function, the corresponding function indicator light flashes, the three-digit nixie tube SEG1 displays the current temperature, and after waiting for 3 seconds without operation, it enters the working state, and the corresponding function indicator light is always on. If the kettle body is lifted during work, the three-digit nixie tube SEG1 displays "E0", but the "power on" key of the key group 200 can be pressed to cancel the current function.

[0036] III. When the water temperature reaches a certain temperature (in addition to the temperature holding function, generally 100 degrees), the three-digit nixie tube SEG1 displays the countdown instead of the original water temperature (some functions do not have a countdown); when the work is completed, the buzzer BUZ1 emits a work completion prompt sound, and the device automatically enters the temperature holding state of the corresponding function (the temperature holding time is not adjustable, and the default is 12 hours). At this time, the function indicator light is turned off, the temperature holding indicator light is turned on, and the buzzer BUZ1 displays the current water temperature. If only the selection of the temperature holding function of the key group 200 is pressed, the temperature holding indicator light flashes, the three-digit nixie tube SEG1 flashes to display the temperature holding temperature, the temperature holding temperature can be adjusted, and after 3 seconds, the temperature holding state is entered.

[0037] IV. After the temperature holding reaches 12 hours, return to the standby state, and the three-digit nixie tube SEG1 displays "---".

[0038] V. Each function mode is defined by default working time and temperature holding action temperature.

[0039] Although the embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the utility model, and the scope of the utility model is defined by the claims and their equivalents.

Claims

1. A health pot control circuit, comprising a power supply circuit (100), a control chip IC1 and a key group (200), the power supply circuit (100) supplies power to the control chip IC1, and the control chip IC1 is connected with the key group (200), characterized in that: The control chip IC1 is connected with a water level detection circuit (400), the water level detection circuit (400) comprises a water level detection chip IC2, the 8-pin of the water level detection chip IC2 is connected to the power supply circuit (100), the 6-pin of the water level detection chip IC2 is connected to the 15-pin of the control chip IC1, the 5-pin of the water level detection chip IC2 is connected with a liquid detection end, and the power supply circuit (100) supplies power to the 8-pin of the water level detection chip IC2. ​ 2. The health preserving pot control circuit according to claim 1, characterized in that: The 5-pin of the water level detection chip IC2 is connected with the liquid detection end through the tenth resistor R10, the 6-pin of the water level detection chip IC2 is connected with the ninth resistor R9, the 8-pin of the water level detection chip IC2 is also connected with the fourth capacitor C4, the other end of the fourth capacitor C4 is connected with the ground end GND, the 2-pin of the water level detection chip IC2 is also connected with the third capacitor C3, the 3-pin of the water level detection chip IC2 is also connected with the seventh capacitor C7, the 4-pin of the water level detection chip IC2 is also connected with the sixth capacitor C6, and the sixth capacitor C6 is connected with the fifth capacitor C5.

3. The health preserving pot control circuit according to claim 1, characterized in that: The 11-pin of the control chip IC1 is connected with the joint JP1, and the 6-pin of the water level detection chip IC2 is connected to the 1-pin of the joint JP1.

4. The health preserving pot control circuit according to claim 1, characterized in that: The control chip IC1 is connected with a three-bit digital tube SEG1.

5. The health preserving pot control circuit according to claim 1, characterized in that: The control chip IC1 is connected with a warning circuit (300), the warning circuit (300) comprises a temperature sensor joint NTC1, a temperature sensor, a buzzer BUZ1, a first capacitor C1, a second capacitor C2, a seventh resistor R7, an eighth resistor R8 and a BUZ+NTC end, the temperature sensor joint NTC1 is connected with the temperature sensor, the 1-pin and the 2-pin of the temperature sensor joint NTC1 are connected with the first capacitor C1, the 2-pin of the temperature sensor joint NTC1 is also connected with the seventh resistor R7 and the eighth resistor R8, the eighth resistor R8 is connected with the BUZ+NTC end and the second capacitor C2 respectively, the second capacitor C2 is connected with the buzzer BUZ1, and the BUZ+NTC end is connected with the 9-pin of the control chip IC1.

6. The health preserving pot control circuit according to claim 1, characterized in that: The power supply circuit (100) comprises a step-down chip U1, an ACL1 end, an ACN1 end and a COM1 end, the ACL1 end is connected to the 4-pin and the 5-pin of the step-down chip U1 respectively, the 2-pin of the step-down chip U1 is connected with a first inductor L1, the first inductor L1 is connected to a +5V end, the 6-pin of the step-down chip U1 is connected with the ACN1 end and the COM1 end respectively, the common end between the 6-pin of the step-down chip U1 and the ACN1 end is connected with a fifth resistor R5, the fifth resistor R5 is connected with a sixth resistor R6, and one end of the sixth resistor R6 is connected to the 12-pin of the control chip IC1.

7. The health preserving pot control circuit according to claim 1, characterized in that: The key group (200) comprises a first key KEY1, a second key KEY2, a third key KEY3 and a fourth key KEY4, and the first key KEY1, the second key KEY2, the third key KEY3 and the fourth key KEY4 are connected to the control chip IC1 respectively.

8. The health preserving pot control circuit according to claim 1, characterized in that: The 7-pin and the 8-pin of the control chip IC1 are connected in parallel with the third capacitor C3.

9. The health preserving pot control circuit according to claim 1, characterized in that: The 5th pin of the water level detection chip IC2 is connected with the liquid detection end through the bidirectional thyristor Q1, the 3rd pin of the thyristor Q1 is connected with the fourth resistor R4, the fourth resistor R4 is connected with the 15th pin of the control chip IC1, and the 2nd pin of the thyristor Q1 is connected with the +5V end.

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