Constant-temperature intelligent vehicle-mounted cushion starting and stopping control circuit

Abstract

The utility model discloses a constant-temperature intelligent vehicle-mounted cushion starting and stopping control circuit. The temperature control circuit comprises a main control chip, a heating circuit, an NTC temperature detection circuit, a voltage stabilizing circuit, a switching circuit, a temperature mode circuit and a temperature display circuit, and the heating circuit, the NTC temperature detection circuit, the switching circuit, the temperature mode circuit and the temperature display circuit are all connected with the main control chip. The main control chip, the heating circuit, the NTC temperature detection circuit, the voltage stabilizing circuit, the switching circuit and the temperature mode circuit are all connected with the voltage stabilizing circuit. The vehicle-mounted seat cushion has the beneficial effects that the temperature of the vehicle-mounted seat cushion during heating is detected in real time; starting and stopping of the heating function of the vehicle-mounted seat cushion are controlled, and the heating function of the vehicle-mounted seat cushion in different temperature modes is selected; the heating temperature mode and the heating working state of the vehicle-mounted seat cushion are visually displayed; the temperature value reached when the vehicle-mounted cushion is heated is visually displayed; the purposes of selecting the temperature and displaying the temperature value are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the engine cabin related technical field, especially point to a constant temperature intelligence start -stop vehicle seat control circuit. BACKGROUND

[0002] ‌Heating vehicle seat is a kind of equipment that provides heating function for car seat through electric heating technology, mainly used to improve the comfort in winter driving. The working principle of heating vehicle seat is to embed adjustable temperature heating body in the seat cushion, when the seat cushion is connected to the car power supply, the heating body starts to work, and the seat cushion generates heat, so as to provide warm and comfortable seat experience for drivers and passengers. The existing heating vehicle seat is relatively single in function, and is usually set to a temperature for heating after power-on, and cannot adjust the temperature and obtain the specific temperature value. SUMMARY

[0003] The utility model discloses in order to overcome the above insufficient in the prior art, provide a constant temperature intelligence start -stop vehicle seat control circuit that can select temperature and display temperature value.

[0004] In order to realize the above purpose, the utility model adopts the following technical scheme:

[0005] A constant temperature intelligence start -stop vehicle seat control circuit, including main control chip, heating circuit, NTC temperature detection circuit, voltage stabilizing circuit, switch circuit, temperature mode circuit and temperature display circuit, heating circuit, NTC temperature detection circuit, switch circuit, temperature mode circuit and temperature display circuit are connected with main control chip, and the main control chip, heating circuit, NTC temperature detection circuit, voltage stabilizing circuit, switch circuit and temperature mode circuit are connected with voltage stabilizing circuit.

[0006] Among them, heating circuit is used to realize the heating function of vehicle seat;NTC temperature detection circuit is used for real-time detection of the temperature of vehicle seat heating;Voltage stabilizing circuit is used to provide stable DC voltage source for the whole control circuit;Switch circuit is used to control the start and stop of the heating function of vehicle seat and select the heating function of vehicle seat of different temperature mode;Temperature mode circuit is used to directly show the heating temperature mode and heating working condition of vehicle seat;Temperature display circuit is used to directly show the temperature value reached by vehicle seat heating;The design of the above structure achieves the purpose of temperature selection and temperature value display.

[0007] As preferred, the input end of the voltage stabilizing circuit is connected with 29V DC vehicle power supply, and the output end of the voltage stabilizing circuit is 5V DC voltage.

[0008] As preferred, the heating circuit comprises a heating sheet, a current-limiting resistor, a pull-down resistor and a MOS tube, the output end of the master control chip is connected with the gate of the MOS tube through the current-limiting resistor, one end of the pull-down resistor is connected between the current-limiting resistor and the gate of the MOS tube, the other end of the pull-down resistor and the drain of the MOS tube are grounded, the source of the MOS tube is connected with one end of the heating sheet, and the other end of the heating sheet is connected with a 29V direct current vehicle power supply.

[0009] As preferred, the NTC temperature detection circuit comprises an NTC thermistor, a first resistor, a second resistor and a first capacitor, one end of the NTC thermistor is connected with the master control chip through the second resistor, one end of the first resistor is connected with the output end of the voltage stabilizing circuit, the other end of the first resistor is connected between the NTC thermistor and the second resistor, one end of the first capacitor is connected between the second resistor and the master control chip, and the other end of the NTC thermistor and one end of the first capacitor are grounded.

[0010] As preferred, the switch circuit comprises a power switch, a temperature increase gear switch and a temperature decrease gear switch, and the power switch, the temperature increase gear switch and the temperature decrease gear switch are connected with the master control chip.

[0011] As preferred, the temperature mode circuit comprises a power indicator light, a high-temperature mode indicator light, a medium-temperature mode indicator light and a low-temperature mode indicator light, and the power indicator light, the high-temperature mode indicator light, the medium-temperature mode indicator light and the low-temperature mode indicator light are connected with the master control chip.

[0012] As preferred, the temperature display circuit comprises a temperature display nixie tube, and the temperature display nixie tube is connected with the master control chip.

[0013] The utility model discloses a circuit principle block diagram of the utility model discloses a vehicle-mounted seat cushion heating device. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the circuit principle block diagram of the utility model discloses a vehicle-mounted seat cushion heating device.

[0015] Figure 2 It is the circuit principle diagram of the utility model discloses a vehicle-mounted seat cushion heating device.

[0016] In the drawing: 1. master control chip, 2. heating circuit, 3. NTC temperature detection circuit, 4. voltage stabilizing circuit, 5. switch circuit, 6. temperature mode circuit, 7. temperature display circuit. DETAILED DESCRIPTION

[0017] The utility model is further described below in combination with the drawings and specific embodiments.

[0018] As Figure 1 , Figure 2 In the embodiment, a constant-temperature intelligent start-stop vehicle seat cushion control circuit comprises a main control chip 1, a heating circuit 2, an NTC temperature detection circuit 3, a voltage stabilizing circuit 4, a switching circuit 5, a temperature mode circuit 6 and a temperature display circuit 7, the heating circuit 2, the NTC temperature detection circuit 3, the switching circuit 5, the temperature mode circuit 6 and the temperature display circuit 7 are connected with the main control chip 1, and the main control chip 1, the heating circuit 2, the NTC temperature detection circuit 3, the voltage stabilizing circuit 4, the switching circuit 5 and the temperature mode circuit 6 are connected with the voltage stabilizing circuit 4.

[0019] The input end of the voltage stabilizing circuit 4 is connected with a 29V direct-current vehicle power supply, and the output end of the voltage stabilizing circuit 4 is a 5V direct-current voltage.

[0020] The heating circuit 2 comprises a heating sheet, a current-limiting resistor, a pull-down resistor and a MOS tube, the output end of the main control chip 1 is connected with the gate electrode of the MOS tube through the current-limiting resistor, one end of the pull-down resistor is connected between the current-limiting resistor and the gate electrode of the MOS tube, the other end of the pull-down resistor and the drain electrode of the MOS tube are both grounded, the source electrode of the MOS tube is connected with one end of the heating sheet, and the other end of the heating sheet is connected with the 29V direct-current vehicle power supply.

[0021] The NTC temperature detection circuit 3 comprises an NTC thermistor, a first resistor, a second resistor and a first capacitor, one end of the NTC thermistor is connected with the main control chip 1 through the second resistor, one end of the first resistor is connected with the output end of the voltage stabilizing circuit 4, the other end of the first resistor is connected between the NTC thermistor and the second resistor, one end of the first capacitor is connected between the second resistor and the main control chip 1, and the other end of the NTC thermistor and one end of the first capacitor are both grounded.

[0022] The switching circuit 5 comprises a power switch, a temperature increase gear switch and a temperature decrease gear switch, and the power switch, the temperature increase gear switch and the temperature decrease gear switch are connected with the main control chip 1.

[0023] The temperature mode circuit 6 comprises a power indicator light, a high-temperature mode indicator light, a medium-temperature mode indicator light and a low-temperature mode indicator light, and the power indicator light, the high-temperature mode indicator light, the medium-temperature mode indicator light and the low-temperature mode indicator light are connected with the main control chip 1.

[0024] The temperature display circuit 7 comprises a temperature display nixie tube, and the temperature display nixie tube is connected with the main control chip 1.

[0025] The specific circuit principle is as follows: Figure 2As shown, a 29V DC power supply is used for powering the heater, providing a full 29V output voltage. The main control chip (U1) requires a 5V DC voltage source to power it. This 29V voltage needs to be converted to 5V (capacitor C0, diode D0, resistor R0, capacitor C1, capacitor C2, and voltage regulator chip U0 form a voltage regulator circuit). The voltage regulator chip (U0) then outputs 5V.

[0026] The heating function is negatively controlled. The positive pole of the heating function is powered by a 29V DC voltage source. The negative pole is given a signal by the main control chip (U1) through the current limiting resistor R5 and the pull-down resistor R4 to the MOS tube, making the MOS tube conductive and turning on the heating function so that the heating plate starts to heat up.

[0027] The NTC temperature detection is powered by a 5V DC voltage and passes through the first resistor R6. The NTC thermistor feeds the temperature detection of the heating function through the second resistor R7 and the first capacitor C5 to the main control chip (U1).

[0028] The temperature display digital tube is controlled by the main control chip (U1) to display the real-time temperature.

[0029] Power on: Long press to turn on (power switch SW1), the LED light is always on (power indicator LED1 is lit through resistor R15).

[0030] Three different temperature modes: high temperature mode (high temperature mode indicator LED4), medium temperature mode (medium temperature mode indicator LED3), low temperature mode (low temperature mode indicator LED2).

[0031] The principle of this control circuit is: the buttons (temperature plus gear switch and temperature minus gear switch SW2, SW3) are used to increase and decrease the frequency, and a signal is output to the main control chip (U1). After receiving the command, the main control chip (U1) outputs a command to the heating function to make the MOS tube turn on the heating plate to start heating (current limiting resistor R5, pull-down resistor R4, MOS tube Q1), and the NTC thermistor starts to detect the temperature of the heating plate (after passing through the first resistor R6, the second resistor R7, and the first capacitor C5) and feeds back to the main control chip (U1). After the main control chip (U1) detects it, it controls the temperature display digital tube to display the heating temperature (resistor R10, resistor R11, resistor R12, resistor R13, resistor R14, digital tube RLED). When the heating plate is heated to the set temperature, the NTC thermistor detects the temperature and feeds it back to the main control chip (U1). The main chip (U1) controls the heating function to stop heating; when the temperature detected by the NTC thermistor is lower than the set value, the main control chip (U1) enables the heating function to start heating; thereby realizing the functional control of the constant temperature intelligent start-up parking seat cushion.

Claims

1. A constant temperature intelligent start-stop car seat control circuit, characterized in that: The invention comprises a main control chip (1), a heating circuit (2), an NTC temperature detection circuit (3), a voltage stabilizing circuit (4), a switching circuit (5), a temperature mode circuit (6) and a temperature display circuit (7), wherein the heating circuit (2), the NTC temperature detection circuit (3), the switching circuit (5), the temperature mode circuit (6) and the temperature display circuit (7) are all connected to the main control chip (1), and the main control chip (1), the heating circuit (2), the NTC temperature detection circuit (3), the voltage stabilizing circuit (4), the switching circuit (5) and the temperature mode circuit (6) are all connected to the voltage stabilizing circuit (4).

2. A constant temperature intelligent start-stop car seat cushion control circuit according to claim 1, characterized in that: The input end of the voltage stabilizing circuit (4) is connected to a 29V DC vehicle power supply, and the output end of the voltage stabilizing circuit (4) is a 5V DC voltage.

3. A constant temperature intelligent start-stop car seat control circuit according to claim 1 or 2, characterized in that: The heating circuit (2) comprises a heating plate, a current limiting resistor, a pull-down resistor and a MOS tube. The output end of the main control chip (1) is connected to the gate of the MOS tube via the current limiting resistor. One end of the pull-down resistor is connected between the current limiting resistor and the gate of the MOS tube. The other end of the pull-down resistor and the drain of the MOS tube are both grounded. The source of the MOS tube is connected to one end of the heating plate. The other end of the heating plate is connected to a 29V DC vehicle power supply.

4. A constant temperature intelligent start-stop car seat cushion control circuit according to claim 2, characterized in that: The NTC temperature detection circuit (3) comprises an NTC thermistor, a first resistor, a second resistor and a first capacitor, one end of the NTC thermistor is connected to the main control chip (1) through the second resistor, one end of the first resistor is connected to the output end of the voltage stabilization circuit (4), the other end of the first resistor is connected between the NTC thermistor and the second resistor, one end of the first capacitor is connected between the second resistor and the main control chip (1), and the other end of the NTC thermistor and one end of the first capacitor are both grounded.

5. The constant temperature intelligent start-stop car seat cushion control circuit according to claim 2 is characterized in that: The switching circuit (5) comprises a power switch, a temperature up-shift switch and a temperature down-shift switch, and the power switch, the temperature up-shift switch and the temperature down-shift switch are all connected to the main control chip (1).

6. The constant temperature intelligent start-stop car seat control circuit according to claim 2 is characterized in that: The temperature mode circuit (6) includes a power indicator light, a high temperature mode indicator light, a medium temperature mode indicator light and a low temperature mode indicator light, and the power indicator light, the high temperature mode indicator light, the medium temperature mode indicator light and the low temperature mode indicator light are all connected to the main control chip (1).

7. The constant temperature intelligent start-stop car seat control circuit according to claim 2 is characterized in that: The temperature display circuit (7) comprises a temperature display digital tube, and the temperature display digital tube is connected to the main control chip (1).

Images