Control circuit and panel

Abstract

The utility model discloses a control circuit, the control circuit comprises: a control chip, a plurality of drive circuits, a voltage conversion circuit, a water quality detection circuit and a buzzing circuit, the control chip is respectively electrically connected with the plurality of drive circuits, the control chip outputs a signal to control the conduction of the drive circuits; the voltage conversion circuit is used for converting 24V direct current voltage into 5V direct current voltage to provide electric energy for each chip; the control chip is electrically connected with the water quality detection circuit and the buzzing circuit. The control chip outputs signals to control the water quality detection circuit to be started and stopped and control the buzzing circuit to be turned on. The control chip is in signal connection with the plurality of chips, and the control chip carries out data transmission. Meanwhile, the utility model further discloses a panel, a control circuit is integrated in the panel, the occupied space of the circuit in the host is reduced, and the host body can be miniaturized.

Description

TECHNICAL FIELD

[0001] The utility model relates to the panel technical field of pure drinking machine, especially control circuit and panel. BACKGROUND

[0002] The pure drinking machine is a kind of household installation-free water purifier, which integrates water purification, drinking water, heating and water quality detection functions.A new type of pure drinking integrated machine is disclosed in the Chinese patent with the announcement number CN215016166U.

[0003] The panel of general pure drinking machine is separately arranged with mainboard, the mainboard is arranged in the main body of pure drinking machine, control circuit is arranged in the mainboard, the panel and the mainboard are signal transmission through wire, the signal on the panel is pressed and transmitted to the control chip in the mainboard, and then the control circuit in the mainboard drives various electrical components to run, so that the circuit arranged in the main body of machine is not conducive to the miniaturization of equipment. UTILITY MODEL CONTENT

[0004] The utility model discloses a kind of control circuit and panel, control circuit includes drive circuit, voltage conversion circuit, water quality detection circuit, buzzer circuit and back light circuit, and panel integrates control circuit, reduce the space occupied by circuit in host computer.

[0005] The above technical purpose of the utility model is realized by the following technical scheme: a control circuit, the control circuit includes: control chip, a plurality of drive circuits, voltage conversion circuit, water quality detection circuit and buzzer circuit, the control chip is electrically connected with a plurality of drive circuits respectively, and the control chip output signal controls the drive circuit conduction;The voltage conversion circuit converts 24V direct current voltage into 5V direct current voltage to provide electrical energy for each chip;The control chip is electrically connected with water quality detection circuit and buzzer circuit respectively, and the control chip output signal controls the water quality detection circuit start-stop and controls the buzzer circuit conduction;The control chip is connected with a plurality of chip signals, and the control chip carries out data transmission.

[0006] The utility model further provides that: the drive circuit includes first diode, first MOS tube, first resistance and second resistance, the anode of first diode is electrically connected with anode power supply, first diode both ends are connected with output port respectively, the anode of first diode is connected with anode output end, the cathode of first diode is connected with cathode output end, the drain of first MOS tube is connected with the cathode of first diode, the gate of first MOS tube is connected with one end of first resistance, the source of first MOS tube is connected with grounding point, the other end of first resistance is connected with control chip, and the gate and source of first MOS tube are connected with second resistance respectively.

[0007] The utility model discloses further provide: voltage conversion circuit includes the voltage reduction chip IC2, and the input pin VIN of voltage reduction chip IC2 is connected 24V voltage, and one end of inductance L1 is connected to the output pin OUT, and the output pin OUT exports 5V voltage, and the feedback pin FB of voltage reduction chip IC2 is connected to the other end of inductance L1.

[0008] The utility model discloses further provide: the input pin VIN of voltage reduction chip IC2 is parallel with the electric capacity HC2, and the output pin OUT of voltage reduction chip IC2 is parallel with the electric capacity HC1 and schottky diode SD3.

[0009] The utility model discloses further provide: water quality detection circuit includes chip IC1, and the power supply pin VCC of chip IC1 is connected to the collector of PNP transistor Q1, and the emitter of PNP transistor Q1 is connected to 5V power supply, and the base of PNP transistor Q1 is connected to the pin of control chip after connecting resistance R8.

[0010] The utility model discloses further provide: the buzzer circuit includes PNP triode Q2, NPN transistor Q3, NPN transistor Q4 and buzzer BUZ1, and the emitter of PNP triode Q2 is connected to 24 direct current power supply, and one end of buzzer BUZ1 is connected to the collector of PNP triode Q2, and the base of PNP triode Q2 is connected to the collector of NPN transistor Q3 after connecting resistance R22, and the emitter of NPN transistor Q3 is connected to ground, and the other end of buzzer BUZ1 is connected to the collector of NPN transistor Q4 after connecting resistance R26, and the emitter of NPN transistor Q4 is connected to ground.

[0011] The utility model discloses further provide: still include back light circuit, and back light circuit input button signal and control LED lamp pearl luminous, and back light circuit includes LED drive chip and a plurality of LED lamp pearls.

[0012] A panel includes a panel cover and a panel body, the panel cover and the panel body are buckled, and the panel is internally provided with the control circuit according to any one of the preceding aspects.

[0013] By adopting the above technical scheme, the control circuit is integrated in the panel, the volume occupied by the circuit in the machine body is reduced, and the machine body can be miniaturized.

[0014] The utility model discloses further provide: be equipped with a plurality of touch button and digital display screen on the panel cover, and the touch button is normal temperature, hot water, hot water, re -boiling, child lock, water -out respectively.

[0015] Compared with the prior art, the utility model has following beneficial effects: 1, control circuit includes drive circuit, voltage conversion circuit, water quality detection circuit, buzzer circuit and back light circuit, the utility model integrates several circuits into control circuit, makes water quality detection circuit, buzzer circuit and drive circuit integrate together;2, panel integrated control circuit has reduced the occupied space of circuit in host computer, makes host computer body can achieve miniaturization. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is control circuit structure block diagram in the embodiment.

[0017] Figure 2 It is control chip principle diagram in the embodiment.

[0018] Figure 3 It is drive circuit principle diagram in the embodiment.

[0019] Figure 4 It is voltage conversion circuit principle diagram in the embodiment.

[0020] Figure 5 It is water quality detection circuit principle diagram in the embodiment.

[0021] Figure 6 It is buzzer circuit principle diagram in the embodiment.

[0022] Figure 7 It is back light circuit principle diagram in the embodiment.

[0023] Figure 8 It is panel schematic diagram in the embodiment.

[0024] Figure 9 It is panel assembly drawing in the embodiment.

[0025] Figure 10 It is panel cover lamp pearl and button distribution schematic diagram in the embodiment.

[0026] In the drawing: 1, control chip;2, drive circuit;3, voltage conversion circuit;4, water quality detection circuit;5, buzzer circuit;6, back light circuit;7, panel cover;8, panel main body. DETAILED DESCRIPTION

[0027] Clearly and completely describe the technical scheme in the embodiments of the utility model in combination with the drawings in the embodiments of the utility model; Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments, based on the embodiments in the utility model, all other embodiments obtained by the ordinary skill in the art without creative labor belong to the scope of protection of the utility model. It should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0028] As shown in the figure, Figures 1-7 The control circuit disclosed in the embodiment is installed in the panel of the pure drinking machine; the control circuit comprises a control chip 1, a plurality of drive circuits 2, a voltage conversion circuit 3, a water quality detection circuit 4 and a buzzer circuit 5; the voltage conversion circuit 3 converts 24V direct current voltage into 5V direct current voltage to provide power for each chip or electronic element.

[0029] As shown in the figure, Figure 2 The pins of the control chip 1 are electrically connected with each circuit and output signals to trigger the operation of each circuit, and the control chip 1 has data transmission pins, namely the pin RXD_DISP, the pin TXD_DISP, the pin RXD_WATER and the pin TXD_WATER, which can perform data transmission with other chips to improve the expansibility of the control circuit.

[0030] The drive circuit 2 comprises a first diode, a first MOS tube, a first resistor and a second resistor; the anode of the first diode is electrically connected with a positive power supply, the two ends of the first diode are respectively connected with output ports, the anode of the first diode is connected with a positive output end, and the cathode of the first diode is connected with a negative output end, wherein the output ports are electrically connected with various direct current electrical appliances such as relays; the drive circuit 2 can control various functional components in the water purifier, such as water pumps, heating wires and electromagnetic valves, by controlling the opening or closing of the relays; the drain electrode of the first MOS tube is connected with the cathode of the first diode, the gate electrode of the first MOS tube is connected with one end of the first resistor, the source electrode of the first MOS tube is connected with a grounding point, the other end of the first resistor is connected with the control chip 1, and the second resistor is connected with the gate electrode and the source electrode of the first MOS tube respectively; the working principle of the drive circuit 2 is that the control chip 1 outputs signals to make the first MOS tube conductive, and the output ports are conductive to drive various functional components to operate; as Figure 3As shown, five driving circuits 2 are included in the embodiment, which can be used to drive five functional components to operate.

[0031] The voltage conversion circuit 3 in the embodiment is used to convert the direct current voltage, and convert the 24V direct current voltage into 5V direct current voltage, as shown in the figure. Figure 4 As shown, the voltage conversion circuit 3 includes a step-down chip IC2, the input pin VIN of the step-down chip IC2 is connected with the 24V voltage, one end of the inductor L1 is connected with the output pin OUT of the step-down chip IC2, and the output pin OUT outputs 5V voltage, the feedback pin FB of the step-down chip IC2 is connected with the other end of the inductor L1, and the output voltage is stably fed back and adjusted; the capacitor HC2 is connected in parallel with the input pin VIN for the stability of the output voltage; the capacitor C5 is a decoupling capacitor; the capacitor HC1 and the Schottky diode SD3 are connected in parallel with the output pin OUT; and the Schottky diode SD2 is connected with the input pin VIN for rectification to ensure the quality of the output direct current voltage.

[0032] As shown in the figure, Figure 5 The water quality detection circuit 4 includes a chip IC1, the power supply pin VCC of the chip IC1 is connected with the collector of a PNP transistor Q1, the emitter of the PNP transistor Q1 is connected with a 5V power supply, the base of the PNP transistor Q1 is connected with the resistor R8 and then connected with the pin of a control chip 1, the control chip 1 outputs a signal to control the power supply of a digital-to-analog conversion chip IC1 to be turned on or off; the pin of the chip IC1 is connected with the ports CN1 and CN5, the ports CN1 and CN5 can be connected with two detection probes such as TDS probes, and the pins 3Y and 4Y of the chip IC1 are connected with the control chip 1 to transmit signals to the control chip 1.

[0033] As shown in the figure, Figure 6 The buzzer circuit 5 includes a PNP transistor Q2, an NPN transistor Q3, an NPN transistor Q4 and a buzzer BUZ1, the emitter of the PNP transistor Q2 is connected with a 24V direct current power supply, one end of the buzzer BUZ1 is connected with the collector of the PNP transistor Q2, the base of the PNP transistor Q2 is connected with the resistor R22 and then connected with the collector of the NPN transistor Q3, the emitter of the NPN transistor Q3 is connected with the grounding point, the other end of the buzzer BUZ1 is connected with the resistor R26 and then connected with the collector of the NPN transistor Q4, the emitter of the NPN transistor Q4 is connected with the grounding point, and the bases of the NPN transistor Q3 and the NPN transistor Q4 are connected with the pins of the control chip 1 respectively, the control chip 1 controls the PNP transistor Q2, the NPN transistor Q3 and the NPN transistor Q4 to be turned on or off through the output signal to control the buzzer BUZ1 to sound, and the buzzer circuit 5 can alarm when the circuit fails.

[0034] As shown in the figure, Figure 1 , Figure 7As shown, the control circuit also includes a backlight circuit 6, which includes an LED driver chip and multiple LED beads arranged in an array. The two ends of each LED are connected to the SEG and COM pins of the LED driver chip, respectively, allowing the LED driver chip to drive individual LEDs. Figure 7 As shown, buttons T1-T6 are connected to the LED driver chip, and the LED driver chip's data is connected to control chip 1, transmitting the input control signal to control chip 1. Figure 10 As shown, the LED beads are arranged in order of number inside the panel cover 7. When the LED beads are lit, they display numbers or icons.

[0035] like Figure 8 As shown, this embodiment also discloses a panel, including a panel cover 7 and a panel body 8, which are fastened together. Circuit boards are respectively provided inside the panel cover 7 and the panel body 8. A backlight circuit 6 is provided inside the panel cover 7. Several touch buttons and a digital display screen are provided on the panel cover 7, such as... Figure 8 , Figure 9 As shown, in this embodiment, the panel cover 7 has a total of 6 touch buttons, namely room temperature, warm water, hot water, reboil, child lock, and water dispensing. Each touch button is labeled with words and an icon. Above the panel cover 7, there is also a three-digit number and temperature and TDS indicators. These three indicators work together to display real-time temperature and TDS data respectively. Figure 10 As shown, multiple LED beads on the backlight circuit 6 are arranged according to their numbers on the circuit board of the panel cover 7 to illuminate the words and icons on the panel cover 7.

[0036] In this embodiment, the circuit board inside the panel body 8 is equipped with a drive circuit 2, a voltage conversion circuit 3, a water quality detection circuit 4, and a buzzer circuit 5. The circuit board inside the panel body 8 is connected to the circuit board inside the panel cover 7 for data transmission, so that the control circuit is integrated inside the panel, reducing the space occupied by the circuit in the host and enabling the host body to be miniaturized.

[0037] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A control circuit, characterized in that: The control circuit includes: a control chip (1), several drive circuits (2), a voltage conversion circuit (3), a water quality detection circuit (4), and a buzzer circuit (5). The control chip (1) is electrically connected to several of the drive circuits (2), and the control chip (1) outputs a signal to control the drive circuits (2) to conduct. The voltage conversion circuit (3) converts 24V DC voltage into 5V DC voltage to provide power to each chip. The control chip (1) is electrically connected to the water quality detection circuit (4) and the buzzer circuit (5), and the control chip (1) outputs a signal to control the start and stop of the water quality detection circuit (4) and to control the conduction of the buzzer circuit (5). The control chip (1) is signal-connected to several chips, and the control chip (1) performs data transmission.

2. The control circuit according to claim 1, characterized in that: The driving circuit (2) includes a first diode, a first MOS transistor, a first resistor, and a second resistor. The anode of the first diode is electrically connected to the positive power supply. The two ends of the first diode are respectively connected to the output port. The anode of the first diode is connected to the positive output terminal, and the cathode of the first diode is connected to the negative output terminal. The drain of the first MOS transistor is connected to the cathode of the first diode. The gate of the first MOS transistor is connected to one end of the first resistor. The source of the first MOS transistor is connected to the ground point. The other end of the first resistor is connected to the control chip (1). The second resistor is connected to the gate and source of the first MOS transistor.

3. The control circuit according to claim 1, characterized in that: The voltage conversion circuit (3) includes a step-down chip IC2. The input pin VIN of the step-down chip IC2 is connected to a 24V voltage, the output pin OUT is connected to one end of the inductor L1, and the output pin OUT outputs a 5V voltage. The feedback pin FB of the step-down chip IC2 is connected to the other end of the inductor L1.

4. A control circuit according to claim 3, characterized in that: A capacitor HC2 is connected in parallel to the input pin VIN of the step-down chip IC2, and a capacitor HC1 and a Schottky diode SD3 are connected in parallel to the output pin OUT of the step-down chip IC2.

5. A control circuit according to claim 1, characterized in that: The water quality detection circuit (4) includes a chip IC1. The power supply pin VCC of the chip IC1 is connected to the collector of the PNP transistor Q1. The emitter of the PNP transistor Q1 is connected to a 5V power supply. The base of the PNP transistor Q1 is connected to a resistor R8 and then to the pin of the control chip (1).

6. A control circuit according to claim 1, characterized in that: The buzzer circuit (5) includes a PNP transistor Q2, an NPN transistor Q3, an NPN transistor Q4, and a buzzer BUZ1. The emitter of the PNP transistor Q2 is connected to a 24V DC power supply. The collector of the PNP transistor Q2 is connected to one end of the buzzer BUZ1. The base of the PNP transistor Q2 is connected to the collector of the NPN transistor Q3 after being connected to a resistor R22. The emitter of the NPN transistor Q3 is connected to the ground point. The other end of the buzzer BUZ1 is connected to the collector of the NPN transistor Q4 after being connected to a resistor R26. The emitter of the NPN transistor Q4 is connected to the ground point.

7. A control circuit according to claim 1, characterized in that: It also includes a backlight circuit (6), which inputs key signals and controls LED beads to emit light. The backlight circuit (6) includes an LED driver chip and multiple LED beads.

8. A panel, comprising a panel cover (7) and a panel body (8), wherein the panel cover (7) and the panel body (8) are fastened together, characterized in that: The panel is provided with a control circuit according to any one of claims 1-7.

9. A panel according to claim 8, characterized in that: The panel cover (7) is provided with several touch buttons and a digital display screen. The touch buttons are room temperature, warm water, hot water, reboil, child lock, and water outlet.

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