CN206348637U - Automatic inspection pressure vacuumizes circuit - Google Patents

Abstract

Circuit is vacuumized the utility model discloses a kind of automatic inspection pressure, including main control chip, input unit, pressure detection circuit and vacuumize circuit, pressure detection circuit includes pressure sensor, pull-up resistor and shift knob, vacuumizing circuit includes FET, diode and motor interface, actual pressure value and default pressure value that can be in container, adjust automatically vacuumizes the opening and closing of motor, allow the container to the consistent vacuum of held stationary, automatically controlled so as to reach, simplify the purpose used, and be not in excessively to vacuumize due to vacuumizing motor and cause the situation of container explosion, therefore, it is possible to improve the security of product.

Description

Automatic inspection pressure vacuumizes circuit

Technical field

The utility model is related to the field of vacuumizing, and especially a kind of automatic inspection pressure vacuumizes circuit.

Background technology

The control circuit of current vaccum-pumping equipment, is mainly constituted by vacuumizing motor and button, is set as long as starting In vacuumizing the button on circuit, motor will start running and be vacuumized, but the degree that vacuumizes of motor does not have one The control setting of individual quantization, can only voluntarily judge to close the time for vacuumizing circuit according to user, take out true but if forgetting to turn off Null circuit, can cause motor to be constantly in working condition situation about excessively vacuumizing occur, it is thus possible to can cause container Explode and cause danger.

Utility model content

To solve the above problems, the purpose of this utility model is that providing a kind of automatic inspection pressure vacuumizes circuit, Neng Gougen According to the actual pressure value in container and default pressure value, adjust automatically vacuumizes the opening and closing of motor so that container energy The consistent vacuum of enough held stationaries, automatically controls so as to reach, simplifies the purpose used, and be not in due to taking out Vacuum motor excessively vacuumizes and causes the situation of container explosion, therefore, it is possible to improve the security of product.

The technical scheme that the invention for solving the technical problem is used is：

Automatic inspection pressure vacuumizes circuit, including main control chip, the input unit for inputting preset pressure value, for detecting The pressure detection circuit of pressure value in container and for control vacuumize motor to container carry out vacuumize process vacuumize Circuit, the signal pins and grounding pin of input unit are connected to the signal input pin and reference ground of main control chip, pressure Power detection circuit includes pressure sensor, pull-up resistor and the shift knob for opening main control chip, the two ends of pull-up resistor The startup pin and chip operation power supply of main control chip are connected to, the two ends of shift knob are connected to main control chip Start pin and reference ground, the first signal end of pressure sensor and secondary signal end are connected to the first inspection of main control chip Pin and the second detection pin are surveyed, the first earth terminal and the second earth terminal of pressure sensor are connected together with reference ground, Circuit is vacuumized to carry out the diode of voltage clamping including FET, for the drain electrode to FET and take out true for connecting The motor interface of empty motor, the grid of FET and the signal output pin of main control chip are connected together, FET Source electrode is connected together with reference ground, and diode is connected between the drain electrode of FET and motor drive power supply and causes motor Driving power supply can not be directly to FET drain electrode be powered, motor interface and diodes in parallel are connected to FET Between drain electrode and motor drive power supply, power pins and the chip operation power supply of main control chip are connected together, main control chip Earth terminal pin is connected together with reference ground.

Further, in addition to for showing the indicating circuit of the current working condition for vacuumizing motor, indicating circuit includes The positive pole of the first indicator lamp and the second indicator lamp that color is differed, the first indicator lamp and the second indicator lamp passes through the first electricity respectively Resistance and second resistance are connected to the first of main control chip and indicate that pin and second indicates pin, the first indicator lamp and the second indicator lamp Negative pole be connected together with reference ground.

Further, the first divider resistance that circuit also includes being used to provide bias voltage for the grid of FET is vacuumized With the second divider resistance, the two ends of the first divider resistance are connected to the signal output pin and FET of main control chip Grid, the two ends of the second divider resistance are connected to the grid and reference ground of FET.

Further, the power pins of main control chip are connected together by a filter capacitor and reference ground.

Further, input unit is knob button.

Further, the model HT46R064 of main control chip.

Further, the model MEM2306 of FET.

The beneficial effects of the utility model are：Automatic inspection pressure vacuumizes circuit, and pressure sensor being capable of detection container in real time In pressure value, what main control chip can be detected according to the preset pressure value set by knob button and by pressure sensor Pressure value is contrasted, so as to vacuumize the opening and closing of motor according to comparing result adjust automatically so that container energy The consistent vacuum of enough held stationaries, automatically controls so as to reach, simplifies the purpose used, and be not in due to taking out Vacuum motor excessively vacuumizes and causes the situation of container explosion, therefore, it is possible to improve the security of product；What color was differed First indicator lamp and the second indicator lamp can correspond to the working condition that display vacuumizes motor, so as to have a clear understanding of user Automatic inspection pressure vacuumizes the processing state of circuit, is operated so as to facilitate user to vacuumize circuit to automatic inspection pressure；First point The compound action of piezoresistance and the second divider resistance, can provide a satisfactory biased electrical for the grid of FET Pressure, so that FET can be turned in the presence of this bias voltage, so as to timely and effectively to vacuumizing Motor is operated；Filter capacitor can be filtered processing to the chip operation power supply for supplying main control chip so that supply master The chip operation power supply of control chip can totally be stablized, so as to ensure that main control chip can stably work, be not in due to Job insecurity and cause fault open to vacuumize the situation of motor.

Brief description of the drawings

The utility model is described in further detail with example below in conjunction with the accompanying drawings.

Fig. 1 is that the utility model examines the circuit theory diagrams that pressure vacuumizes circuit automatically.

Embodiment

Reference picture 1, automatic inspection pressure of the present utility model vacuumizes circuit, including main control chip U2, for inputting default pressure The input unit K1 of force value, the pressure detection circuit 1 for the pressure value in detection container and for control vacuumize motor pair Container carries out vacuumize process and vacuumizes circuit 2, and input unit K1 signal pins P and grounding pin N be connected to master Control chip U2 signal input pin PA6 and reference ground, pressure detection circuit 1 include pressure sensor J1, pull-up resistor R10 and The startup that shift knob SW for opening main control chip U2, pull-up resistor R10 two ends are connected to main control chip U2 is drawn Pin RES and chip operation power supply, shift knob SW two ends are connected to main control chip U2 startup pin RES and reference Ground, pressure sensor J1 the first signal end A2 and secondary signal end A3 are connected to main control chip U2 the first detection pin The detection pin PB1 of PB0 and second, pressure sensor J1 the first earth terminal A1 and the second earth terminal A4 are connected to reference ground Together, vacuumize circuit 2 including FET Q1, for FET Q1 drain electrode carry out voltage clamping diode D3 and The motor interface P1 of motor, FET Q1 grid and main control chip U2 signal output pin PB2 are vacuumized for connecting It is connected together, FET Q1 source electrode and reference ground are connected together, and diode D3 is connected to FET Q1 drain electrode Between motor drive power supply and so that motor drive power supply is powered from the drain electrode directly to FET Q1, motor connects Mouth P1 and diode D3 is connected in parallel between FET Q1 drain electrode and motor drive power supply, and main control chip U2 power supply draws Pin VDD is connected together with chip operation power supply, and main control chip U2 earth terminal pin VSS and reference ground are connected together, wherein, Input unit K1 is knob button, main control chip U2 model HT46R064, FET Q1 model MEM2306.

Reference picture 1, when vacuumizing circuit to container progress vacuumize process using automatic inspection pressure of the present utility model, is used Shift knob SW is pressed at family first, starts main control chip U2, now, and pressure sensor J1 starts working and continued in real time to holding Vacuum in device detected, and by the detection pin PB0 of first as universal input interface on main control chip U2 and The pressure value detected, is transferred to main control chip U2, then user sets the phase on input unit K1 by the second detection pin PB1 The pressure value for hoping container be in, now, two pressure values are analyzed in main control chip U2, for example, pressure sensor J1 The pressure value detected in container is normal pressure 100KPa, and the desired pressure value that user sets on input unit K1 is negative pressure Pressure value in 20KPa, i.e. user's desired container is 80KPa, the pressure value due to the pressure value in container higher than setting 10%, therefore main control chip U2 exports a high level in its signal output pin PB2, the high level acts on FET Q1 Grid and scene effect pipe Q1 grid on produce a bias voltage, FET Q1 is in the presence of the bias voltage Conducting, therefore, is connected on motor interface P1 and vacuumizes motor by FET Q1 in motor drive power supply and reference Form an electric power loop between ground, therefore vacuumize the motor progress that is unlocked and vacuumize work, with vacuumizing motor pair Pressure value in the vacuumize process of container, container is persistently reduced, and pressure sensor J1 continues in real time to the pressure in container Value, which is detected and gathered, is sent to main control chip U2, and main control chip U2 then persistently contrasts two pressure values, when in container When actual pressure value is no more than the 10% of the pressure value of setting, main control chip U2 exports a low electricity in its signal output pin PB2 It is flat, so that FET Q1 cut-offs, therefore vacuumize motor and be stopped, so that the pressure value in container can be with setting The pressure value put keeps relatively uniform.Its pressure value is caused to rise and be higher than the pressure value of setting when container enters air When 10%, main control chip U2 signal output pin PB2 exports a high level again, so as to be again started up vacuumizing motor, makes Constant pressure can be kept by obtaining container.Therefore, automatic inspection pressure of the present utility model vacuumizes circuit, can realize and automatically control and letter Change the purpose that uses, and be not in excessively to vacuumize due to vacuumizing motor and cause the situation of container explosion, so as to carry The high security of product.

Wherein, reference picture 1, automatic inspection pressure of the present utility model, which vacuumizes circuit, also to be included currently vacuumizing electricity for showing The indicating circuit 3 of the working condition of machine, indicating circuit 3 includes the first indicator lamp LED1 and the second indicator lamp that color is differed LED2, the first indicator lamp LED1 and the second indicator lamp LED2 positive pole are connected to by first resistor R1 and second resistance R2 respectively The first of main control chip U2 indicates that pin PB4 and second indicates pin PB3, the first indicator lamp LED1 and the second indicator lamp LED2 Negative pole is connected together with reference ground.First indicator lamp LED1 and the second indicator lamp LED2 color are differed, and such as first Indicator lamp LED1 glow color is red, represents automatic inspection pressure and vacuumizes circuit and be in and vacuumizes working condition, and second refers to The glow color for showing lamp LED2 is green, and representative has completed vacuumize process, and therefore, indicating circuit 3 can correspond to display and take out very The working condition of empty motor, so as to make user have a clear understanding of the processing state that automatic inspection pressure vacuumizes circuit, so that convenient User vacuumizes circuit to automatic inspection pressure and operated.

Wherein, reference picture 1, vacuumizes circuit 2 also includes being used to provide bias voltage for FET Q1 grid the One divider resistance R5 and the second divider resistance R13, the first divider resistance R5 two ends are connected to main control chip U2 signal Output pin PB2 and FET Q1 grid, the second divider resistance R13 two ends are connected to FET Q1 grid And reference ground.First divider resistance R5 and the second divider resistance R13 compound action, can be provided for FET Q1 grid One satisfactory bias voltage, so that FET Q1 can be turned in the presence of this bias voltage, so that Timely and effectively it can be operated to vacuumizing motor.

Wherein, reference picture 1, main control chip U2 power pins VDD is connected to one by a filter capacitor C3 and reference ground Rise.Filter capacitor C3 can be filtered processing to the chip operation power supply for supplying main control chip U2 so that supply main control chip U2 chip operation power supply can totally be stablized, and be not in due to work so as to ensure that main control chip U2 can stably work Make situation that is unstable and causing fault open to vacuumize motor.

Above is to it is of the present utility model it is preferable implementation illustrated, but the utility model be not limited to it is above-mentioned Embodiment, those skilled in the art can also make a variety of be equal on the premise of without prejudice to the utility model spirit Deformation is replaced, and these equivalent deformations or replacement are all contained in the application claim limited range.

Claims (7)

1. inspection pressure vacuumizes circuit automatically, it is characterised in that：Including main control chip（U2）, input for inputting preset pressure value Device（K1）, pressure detection circuit for the pressure value in detection container（1）Container is entered with motor is vacuumized for control Row vacuumize process vacuumizes circuit（2）, the input unit（K1）Signal pins（P）And grounding pin（N）Connect respectively It is connected to the main control chip（U2）Signal input pin（PA6）And reference ground, the pressure detection circuit（1）Passed including pressure Sensor（J1）, pull-up resistor（R10）With for opening the main control chip（U2）Shift knob（SW）, the pull-up resistor （R10）Two ends be connected to the main control chip（U2）Startup pin（RES）With chip operation power supply, the switch is pressed Button（SW）Two ends be connected to the main control chip（U2）Startup pin（RES）And reference ground, the pressure sensor （J1）The first signal end（A2）With secondary signal end（A3）It is connected to the main control chip（U2）First detection pin （PB0）With the second detection pin（PB1）, the pressure sensor（J1）The first earth terminal（A1）With the second earth terminal（A4） It is connected together with reference ground, it is described to vacuumize circuit（2）Including FET（Q1）, for the FET（Q1）'s Drain electrode carries out the diode of voltage clamping（D3）With the motor interface that motor is vacuumized for connecting（P1）, the FET （Q1）Grid and the main control chip（U2）Signal output pin（PB2）It is connected together, the FET（Q1）'s Source electrode is connected together with reference ground, the diode（D3）It is connected to the FET（Q1）Drain electrode and motor driving electricity Between source and cause motor drive power supply from directly to the FET（Q1）Drain electrode be powered, the motor interface （P1）With the diode（D3）It is connected in parallel in the FET（Q1）Drain electrode and motor drive power supply between, the master Control chip（U2）Power pins（VDD）It is connected together with chip operation power supply, the main control chip（U2）Earth terminal pin （VSS）It is connected together with reference ground.

2. automatic inspection pressure according to claim 1 vacuumizes circuit, it is characterised in that：Also include being used to show current take out very The indicating circuit of the working condition of empty motor（3）, the indicating circuit（3）The first indicator lamp differed including color（LED1） With the second indicator lamp（LED2）, first indicator lamp（LED1）With the second indicator lamp（LED2）Positive pole respectively pass through first electricity Resistance（R1）And second resistance（R2）It is connected to the main control chip（U2）First indicate pin（PB4）Pin is indicated with second （PB3）, first indicator lamp（LED1）With the second indicator lamp（LED2）Negative pole be connected together with reference ground.

3. automatic inspection pressure according to claim 1 vacuumizes circuit, it is characterised in that：It is described to vacuumize circuit（2）Also wrap Include for being the FET（Q1）Grid provide bias voltage the first divider resistance（R5）With the second divider resistance （R13）, first divider resistance（R5）Two ends be connected to the main control chip（U2）Signal output pin（PB2） With the FET（Q1）Grid, second divider resistance（R13）Two ends be connected to the FET （Q1）Grid and reference ground.

4. circuit is vacuumized according to any described automatic inspection pressures of claim 1-3, it is characterised in that：The main control chip（U2） Power pins（VDD）Pass through a filter capacitor（C3）It is connected together with reference ground.

5. circuit is vacuumized according to any described automatic inspection pressure of claim 1, it is characterised in that：The input unit（K1）For Knob button.

6. automatic inspection pressure according to claim 4 vacuumizes circuit, it is characterised in that：The main control chip（U2）Model For HT46R064.

7. automatic inspection pressure according to claim 3 vacuumizes circuit, it is characterised in that：The FET（Q1）Model For MEM2306.