Vacuum box controller

Abstract

The invention relates to a vacuum box controller. A switching power supply is used for rectifying and reducing voltage of 220-volt alternating current into 12-volt direct current and 5-volt direct current. The main control board is electrically connected with a 5-volt direct current end of the switching power supply to start the main control board, and the main control board is electrically connected with a temperature circuit of the measuring circuit and a pressure circuit of the measuring circuit to measure the temperature and the pressure in the vacuum box in real time. When the vacuum box does not need to be used for continuous air exhaust, the pressure in the vacuum box is increased, the vacuum valve of the pump body is closed, the main control board closes power supply of the vacuum pump host interface, and vacuum pump oil is prevented from flowing backwards into the vacuum box. The main control board controls the heating pipe through real-time temperature data of the temperature circuit so as to timely switch between a medium-high temperature working state and a working stopping state.

Description

Technical Field

[0001] The present application relates to the technical field of vacuum boxes, and in particular to a vacuum box controller. Background Art

[0002] The vacuum box is used for degassing objects with high gas content such as powders and colloids. It is a machine with the characteristics of fast degassing rate and high degree of automation. When the vacuum box does not need to be used for continuous vacuuming, the vacuum valve should be closed first, and then the vacuum pump power supply should be turned off, otherwise the vacuum pump oil will flow back into the box. During the operation of the vacuum box, the traditional vacuum box controller often has difficulty in timely switching the vacuum pump power supply of the vacuum box between the medium and high temperature working state and the stop working state. For this reason, it is necessary to propose a vacuum box controller to address the defect of low efficiency of working state switching of traditional vacuum box controllers. Summary of the invention

[0003] Based on this, it is necessary to propose a vacuum box controller to address the defect of low working state switching efficiency of traditional vacuum box controllers.

[0004] The present application provides a vacuum box controller, comprising:

[0005] Switching power supply;

[0006] A main control board, electrically connected to the switching power supply;

[0007] A measuring circuit, comprising a temperature circuit and a pressure circuit, wherein the temperature circuit is electrically connected to the main control board, and the pressure circuit is electrically connected to the main control board;

[0008] A vacuum pump, comprising a pump body and a host interface, wherein the host interface is electrically connected to the main control board, and the host interface is electrically connected to the pump body;

[0009] The heating tube is electrically connected to the host interface.

[0010] Further, the temperature circuit includes a temperature sensor and a comparator;

[0011] The output terminal of the comparator is electrically connected to the negative input terminal of the comparator;

[0012] The output end of the comparator is electrically connected to the temperature measuring end of the main control board;

[0013] The temperature sensor is electrically connected to the positive input terminal of the comparator.

[0014] Furthermore, the temperature circuit also includes a feedback resistor, a first filter capacitor and a second filter capacitor;

[0015] The feedback resistor is electrically connected to a connection link between the output terminal of the comparator and the negative input terminal of the comparator;

[0016] The first filter capacitor is electrically connected to a connection link between the negative input terminal of the comparator and the positive input terminal of the comparator;

[0017] The second filter capacitor is electrically connected to a connection link between the output terminal of the comparator and the negative input terminal of the comparator.

[0018] Further, the pressure circuit includes a pressure sensor, a de-ripple resistor and a de-ripple capacitor;

[0019] The signal output terminal of the pressure sensor is electrically connected to the pressure measuring terminal of the main control board;

[0020] The de-ripple resistor is electrically connected to a connection link between a signal output terminal of the pressure sensor and a pressure measuring terminal of the main control board;

[0021] One end of the de-ripple capacitor is electrically connected to the signal output end of the pressure sensor;

[0022] The other end of the de-ripple capacitor is grounded.

[0023] Furthermore, the heating tube includes an optical coupler switch, a bipolar thyristor and a heating wire;

[0024] The positive signal terminal of the optical coupler switch is electrically connected to the 5V output terminal of the switching power supply;

[0025] The negative signal terminal of the optical coupler switch is electrically connected to the temperature signal terminal of the host interface;

[0026] The forward switch end of the optical coupler switch is electrically connected to the forward end of the bipolar thyristor;

[0027] The forward end of the bipolar thyristor is electrically connected to the mains input end of the switching power supply;

[0028] The negative switch end of the optical coupler switch is electrically connected to the negative end of the bipolar thyristor;

[0029] The heating wire is electrically connected to a connection link between the positive end of the bipolar thyristor and the negative end of the bipolar thyristor.

[0030] Furthermore, the vacuum pump also includes a P-type triode and a contactor;

[0031] The collector of the P-type transistor is electrically connected to the 12V output terminal of the switching power supply;

[0032] The contactor is electrically connected to the connection link between the collector of the P-type transistor and the 12 volt output terminal of the switching power supply;

[0033] The emitter of the P-type transistor is grounded;

[0034] The base of the P-type transistor is electrically connected to the pump signal terminal of the host interface.

[0035] Furthermore, the vacuum pump also includes a bidirectional contactor;

[0036] The loop end of the bidirectional contactor is electrically connected to the mains input end of the switching power supply;

[0037] The pump body is electrically connected to a connection link between a passage end of the bidirectional contactor and a loop end of the bidirectional contactor;

[0038] The circuit breaker end of the bidirectional contactor is vacant.

[0039] Further, the switching power supply includes a rectifier, a first buck chip and a second buck chip;

[0040] Define the mains input terminal of the rectifier as the mains input terminal of the switching power supply;

[0041] The forward output terminal of the rectifier is electrically connected to the input terminal of the first buck chip;

[0042] The negative output terminal of the rectifier is grounded;

[0043] The output end of the first buck chip is defined as the 12 volt output end of the switching power supply;

[0044] The output end of the first buck chip is electrically connected to the input end of the second buck chip;

[0045] The output end of the second buck chip is defined as the 5V output end of the switching power supply.

[0046] The present application relates to a vacuum box controller, which rectifies and steps down 220 volts of alternating current into 12 volts of direct current and 5 volts of direct current through a switching power supply. The main control board is electrically connected to the 5 volt DC terminal of the switching power supply to start the main control board. The main control board is electrically connected to the temperature circuit of the measuring circuit and the pressure circuit of the measuring circuit to measure the temperature and pressure in the vacuum box in real time. When the vacuum box does not need to be continuously evacuated, the pressure in the vacuum box increases. At this time, the vacuum valve of the pump body is closed, and the main control board turns off the power supply of the vacuum pump host interface to prevent the vacuum pump oil from flowing back into the vacuum box. The main control board controls the heating tube through the real-time temperature data of the temperature circuit to achieve timely switching between the medium and high temperature working state and the stop working state. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 A schematic diagram of the structural connection of a vacuum box controller provided in one embodiment of the present application.

[0048] Figure 2 A schematic diagram of the structural connection of a temperature circuit of a vacuum box controller provided in one embodiment of the present application.

[0049] Figure 3 A schematic diagram of the structural connection of a pressure circuit of a vacuum box controller provided in one embodiment of the present application.

[0050] Figure 4 A schematic diagram of the structural connection of a main control board and a host interface of a vacuum box controller provided in one embodiment of the present application.

[0051] Figure 5 A schematic diagram of the structural connection of a vacuum pump of a vacuum box controller provided in one embodiment of the present application.

[0052] Figure 6 A schematic diagram of the structural connection of a heating tube of a vacuum box controller provided in one embodiment of the present application.

[0053] Figure 7 A schematic diagram of the structural connection of a switching power supply of a vacuum box controller provided in one embodiment of the present application.

[0054] Reference numerals:

[0055] 100 - switching power supply; 110 - rectifier; 120 - first buck chip; 130 - second buck chip;

[0056] 200-main control board; 300-measurement circuit; 310-temperature circuit; 311-temperature sensor;

[0057] 312-comparator; 313-feedback resistor; 314-first filter capacitor; 315-second filter capacitor;

[0058] 320-pressure circuit; 321-pressure sensor; 322-de-ripple resistor; 323-de-ripple capacitor;

[0059] 400-vacuum pump; 410-pump body; 420-host interface; 431-P-type transistor; 432-contactor;

[0060] 433-bidirectional contactor; 500-heating tube; 511-optical coupler switch; 512-bipolar thyristor;

[0061] 513-Heating wire. DETAILED DESCRIPTION

[0062] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0063] The present application provides a vacuum box controller.

[0064] like Figure 1 As shown, in one embodiment of the present application, a vacuum box controller includes a switching power supply 100 , a main control board 200 , a measuring circuit 300 , a vacuum pump 400 and a heating tube 500 .

[0065] The main control board 200 is electrically connected to the switching power supply 100 .

[0066] The measurement circuit 300 includes a temperature circuit 310 and a pressure circuit 320 . The temperature circuit 310 is electrically connected to the main control board 200 , and the pressure circuit 320 is electrically connected to the main control board 200 .

[0067] like Figure 4 As shown, the vacuum pump 400 includes a pump body 410 and a host interface 420 , wherein the host interface 420 is electrically connected to the main control board 200 , and the host interface 420 is electrically connected to the pump body 410 .

[0068] The heating tube 500 is electrically connected to the host interface 420 .

[0069] The present embodiment relates to a vacuum box controller, which rectifies and steps down 220 volts of alternating current into 12 volts of direct current and 5 volts of direct current through a switching power supply 100. The main control board 200 is electrically connected to the 5 volt direct current terminal of the switching power supply 100 to start the main control board 200. The main control board 200 is electrically connected to the temperature circuit 310 of the measuring circuit 300 and the pressure circuit 320 of the measuring circuit 300 to measure the temperature and pressure in the vacuum box in real time. When the vacuum box does not need to be continuously evacuated, the pressure in the vacuum box increases. At this time, the vacuum valve of the pump body 410 is closed, and the main control board 200 turns off the power supply of the host interface 420 of the vacuum pump 400 to prevent the oil of the vacuum pump 400 from flowing back into the vacuum box. The main control board 200 controls the heating tube 500 through the real-time temperature data of the temperature circuit 310 to achieve timely switching between the medium and high temperature working state and the stop working state.

[0070] like Figure 2As shown, in one embodiment of the present application, the temperature circuit 310 includes a temperature sensor 311 and a comparator 312. The output end of the comparator 312 is electrically connected to the negative input end of the comparator 312. The output end of the comparator 312 is electrically connected to the temperature measuring end of the main control board 200. The temperature sensor 311 is electrically connected to the positive input end of the comparator 312.

[0071] Specifically, the temperature sensor 311 can select a temperature sensor 311 of model PT00. The temperature sensor 311 generates a current analog quantity according to the temperature inside the vacuum box. The comparator 312 receives the current analog quantity to generate a corresponding level signal, which is transmitted to the main control board 200. The main control board 200 receives the level signal of the comparator 312 to realize the switching of the heating tube 500.

[0072] Based on the real-time temperature data collection of the temperature sensor 311 and the comparator 312, the high-temperature working state and the stop working state of the vacuum box can be switched in time, thereby preventing the vacuum pump 400 from being damaged and the defect of low yield of the vacuum chamber material from being caused.

[0073] like Figure 2 As shown, in one embodiment of the present application, the temperature circuit 310 further includes a feedback resistor 313, a first filter capacitor 314, and a second filter capacitor 315. The feedback resistor 313 is electrically connected to the connection link between the output terminal of the comparator 312 and the negative input terminal of the comparator 312. The first filter capacitor 314 is electrically connected to the connection link between the negative input terminal of the comparator 312 and the positive input terminal of the comparator 312. The second filter capacitor 315 is electrically connected to the connection link between the output terminal of the comparator 312 and the negative input terminal of the comparator 312.

[0074] Specifically, since the electrical signal transmitted from the temperature sensor 311 to the comparator 312 is a current analog quantity, the output terminal signal of the comparator 312 is used as feedback by using the feedback resistor 313, so that the electrical signal of the temperature sensor 311 can be harmonically coupled, thereby reducing the high-voltage breakdown risk of the main control board 200 and improving the accuracy of data judgment of the main control board 200. In addition, the high-temperature working state and the stop working state of the vacuum box can be switched in time, thereby preventing the vacuum pump 400 from being damaged and the defect of low yield of the vacuum chamber material.

[0075] Simply, the first filter capacitor 314 and the second filter capacitor 315 can also realize the feedback function of the signal, thereby reducing the high voltage breakdown risk of the main control board 200 and improving the accuracy of data judgment of the main control board 200.

[0076] The first filter capacitor 314 is electrically connected to the connection link between the negative input terminal of the comparator 312 and the positive input terminal of the comparator 312. The first filter capacitor 314 is a cross-line capacitor, which can couple the signal error between the negative input terminal of the comparator 312 and the positive input terminal of the comparator 312.

[0077] The feedback resistor 313 and the second filter capacitor 315 can be combined into an RC filter loop, thereby reducing the peak noise of the output signal of the comparator 312 .

[0078] like Figure 3 As shown, in one embodiment of the present application, the pressure circuit 320 includes a pressure sensor 321, a de-ripple resistor 322 and a de-ripple capacitor 323. The signal output end of the pressure sensor 321 is electrically connected to the pressure measuring end of the main control board 200. The de-ripple resistor 322 is electrically connected to the connection link between the signal output end of the pressure sensor 321 and the pressure measuring end of the main control board 200. One end of the de-ripple capacitor 323 is electrically connected to the signal output end of the pressure sensor 321. The other end of the de-ripple capacitor 323 is grounded.

[0079] Specifically, the pressure sensor 321 uses the de-ripple resistor 322 to achieve impedance crossing of the pressure measuring end connected to the main control board 200, thereby reducing the echo of the input signal of the pressure sensor 321 and improving the accuracy of the input signal of the pressure sensor 321.

[0080] The de-ripple resistor 322 and the de-ripple capacitor 323 can form a first-order filter circuit, further improving the accuracy of the input signal of the pressure sensor 321.

[0081] like Figure 6 As shown, in one embodiment of the present application, the heating tube 500 includes an optocoupler switch 511, a bipolar thyristor 512 and a heating wire 513. The positive signal end of the optocoupler switch 511 is electrically connected to the 5 volt output end of the switching power supply 100. The negative signal end of the optocoupler switch 511 is electrically connected to the temperature signal end of the host interface 420. The positive switch end of the optocoupler switch 511 is electrically connected to the positive end of the bipolar thyristor 512. The positive end of the bipolar thyristor 512 is electrically connected to the mains input end of the switching power supply 100. The negative switch end of the optocoupler switch 511 is electrically connected to the negative end of the bipolar thyristor 512. The heating wire 513 is electrically connected to the connection link between the positive end of the bipolar thyristor 512 and the negative end of the bipolar thyristor 512.

[0082] Specifically, the optocoupler switch 511 realizes the on / off control of the bipolar thyristor 512 through the weak current control of the main control board 200, thereby realizing the on / off control of the heating wire 513 and the 220V alternating current.

[0083] The optocoupler switch 511 and the bipolar thyristor 512 are weak current terminals. The flexible and linear input of the optocoupler switch 511 can enable the bipolar thyristor 512 capable of receiving the linear input to adjust the conduction current between the heating wire 513 and the 220 volt alternating current.

[0084] like Figure 5 As shown, in one embodiment of the present application, the vacuum pump 400 further includes a P-type transistor 431 and a contactor 432. The collector of the P-type transistor 431 is electrically connected to the 12 volt output terminal of the switching power supply 100. The contactor 432 is electrically connected to the connection link between the collector of the P-type transistor 431 and the 12 volt output terminal of the switching power supply 100. The emitter of the P-type transistor 431 is grounded. The base of the P-type transistor 431 is electrically connected to the pump signal terminal of the host interface 420.

[0085] Specifically, the base of the P-type transistor 431 is electrically connected to the pump signal terminal of the host interface 420 , and the P-type transistor 431 connects the contactor 432 to the 12V output terminal of the switching power supply 100 by receiving a weak current signal.

[0086] In one embodiment of the present application, the vacuum pump 400 further includes a two-way contactor 433. The loop end of the two-way contactor 433 is electrically connected to the mains input end of the switching power supply 100. The pump body 410 is electrically connected to the connection link between the passage end of the two-way contactor 433 and the loop end of the two-way contactor 433. The circuit breaker end of the two-way contactor 433 is vacant.

[0087] Specifically, after the contactor 432 is connected to the 12V output terminal of the switching power supply 100 , the loop end of the contactor 432 will attract the passage end of the contactor 432 , thereby achieving electrical conduction of the pump body 410 .

[0088] When the contactor 432 and the 12V output terminal of the switching power supply 100 are not connected, the loop end of the contactor 432 will be at the passage end of the contactor 432 and the disconnection end of the contactor 432 .

[0089] like Figure 7As shown, in one embodiment of the present application, the switching power supply 100 includes a rectifier 110, a first buck chip 120 and a second buck chip 130. The mains input end of the rectifier 110 is defined as the mains input end of the switching power supply 100. The positive output end of the rectifier 110 is electrically connected to the input end of the first buck chip 120. The negative output end of the rectifier 110 is grounded. The output end of the first buck chip 120 is defined as the 12 volt output end of the switching power supply 100. The output end of the first buck chip 120 is electrically connected to the input end of the second buck chip 130. The output end of the second buck chip 130 is defined as the 5 volt output end of the switching power supply 100.

[0090] The switching power supply 100 rectifies and steps down the 220 volt AC power into 12 volt DC power and 5 volt DC power. The main control board 200 is electrically connected to the 5 volt DC power terminal of the switching power supply 100 to start the main control board 200. The main control board 200 is electrically connected to the temperature circuit 310 of the measuring circuit 300 and the pressure circuit 320 of the measuring circuit 300 to measure the temperature and pressure in the vacuum box in real time.

[0091] The technical features of the above-described embodiments may be arbitrarily combined, and the execution order of the method steps is not limited. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0092] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A vacuum box controller, characterized in that: include: Switching power supply; A main control board, electrically connected to the switching power supply; A measuring circuit, comprising a temperature circuit and a pressure circuit, wherein the temperature circuit is electrically connected to the main control board, and the pressure circuit is electrically connected to the main control board; A vacuum pump, comprising a pump body and a host interface, wherein the host interface is electrically connected to the main control board, and the host interface is electrically connected to the pump body; The heating tube is electrically connected to the host interface.

2. The vacuum box controller according to claim 1, characterized in that: The temperature circuit includes a temperature sensor and a comparator; The output terminal of the comparator is electrically connected to the negative input terminal of the comparator; The output end of the comparator is electrically connected to the temperature measuring end of the main control board; The temperature sensor is electrically connected to the positive input terminal of the comparator.

3. The vacuum box controller according to claim 2, characterized in that: The temperature circuit also includes a feedback resistor, a first filter capacitor and a second filter capacitor; The feedback resistor is electrically connected to a connection link between the output terminal of the comparator and the negative input terminal of the comparator; The first filter capacitor is electrically connected to a connection link between the negative input terminal of the comparator and the positive input terminal of the comparator; The second filter capacitor is electrically connected to a connection link between the output terminal of the comparator and the negative input terminal of the comparator.

4. The vacuum box controller according to claim 3, characterized in that: The pressure circuit includes a pressure sensor, a de-ripple resistor and a de-ripple capacitor; The signal output terminal of the pressure sensor is electrically connected to the pressure measuring terminal of the main control board; The de-ripple resistor is electrically connected to a connection link between a signal output terminal of the pressure sensor and a pressure measuring terminal of the main control board; One end of the de-ripple capacitor is electrically connected to the signal output end of the pressure sensor; The other end of the de-ripple capacitor is grounded.

5. The vacuum box controller according to claim 4, characterized in that: The heating tube comprises an optical coupler switch, a bipolar thyristor and a heating wire; The positive signal terminal of the optical coupler switch is electrically connected to the 5V output terminal of the switching power supply; The negative signal terminal of the optical coupler switch is electrically connected to the temperature signal terminal of the host interface; The forward switch end of the optical coupler switch is electrically connected to the forward end of the bipolar thyristor; The forward end of the bipolar thyristor is electrically connected to the mains input end of the switching power supply; The negative switch end of the optical coupler switch is electrically connected to the negative end of the bipolar thyristor; The heating wire is electrically connected to a connection link between the positive end of the bipolar thyristor and the negative end of the bipolar thyristor.

6. The vacuum box controller according to claim 5, characterized in that: The vacuum pump also includes a P-type triode and a contactor; The collector of the P-type transistor is electrically connected to the 12V output terminal of the switching power supply; The contactor is electrically connected to the connection link between the collector of the P-type transistor and the 12 volt output terminal of the switching power supply; The emitter of the P-type transistor is grounded; The base of the P-type transistor is electrically connected to the pump signal terminal of the host interface.

7. The vacuum box controller according to claim 6, characterized in that: The vacuum pump also includes a two-way contactor; The loop end of the bidirectional contactor is electrically connected to the mains input end of the switching power supply; The pump body is electrically connected to a connection link between a passage end of the bidirectional contactor and a loop end of the bidirectional contactor; The circuit breaker end of the bidirectional contactor is vacant.

8. The vacuum box controller according to claim 7, characterized in that: The switching power supply includes a rectifier, a first buck chip and a second buck chip; Define the mains input terminal of the rectifier as the mains input terminal of the switching power supply; The forward output terminal of the rectifier is electrically connected to the input terminal of the first buck chip; The negative output terminal of the rectifier is grounded; The output end of the first buck chip is defined as the 12 volt output end of the switching power supply; The output end of the first buck chip is electrically connected to the input end of the second buck chip; The output end of the second buck chip is defined as the 5V output end of the switching power supply.

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