CN212289182U - Positive and negative pressure control device of ink-jet printer - Google Patents
Positive and negative pressure control device of ink-jet printer Download PDFInfo
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- CN212289182U CN212289182U CN202021476198.8U CN202021476198U CN212289182U CN 212289182 U CN212289182 U CN 212289182U CN 202021476198 U CN202021476198 U CN 202021476198U CN 212289182 U CN212289182 U CN 212289182U
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Abstract
The utility model relates to an ink jet printer's positive negative pressure controlling means, including the control unit, detecting element, pressure unit, printing unit, the display element that are connected with the control unit electricity respectively, pressure unit passes through the third trachea and is connected with detecting element, and the third trachea is connected with the one end that the trachea connects, and the other end that the trachea connects is connected with the tracheal one end of fourth, and the tracheal other end of fourth is with print the unit connection. The control unit is used for controlling the operation of the whole device and the constant pressure output by the pressure unit, the detection unit is used for detecting positive and negative pressure values, the pressure unit is used for generating positive and negative pressure air pressure, the printing unit comprises a protection device, an ink box and a spray head, the protection device is connected with the ink box through a fifth air pipe, the ink box is connected with the spray head through an ink pipe, and the protection device is used for protecting internal parts of the positive and negative pressure control device from being damaged due to the entering of ink. This scheme has the precision height, the high advantage of stability, does not need bulky gas holder, makes cost reduction, space is littleer when installing.
Description
Technical Field
The utility model relates to an ink jet printer technical field especially relates to an ink jet printer's positive negative pressure control device.
Background
In the ink-jet printer, after the ink box and the spray head are connected through the ink pipe, a siphonage phenomenon can be generated. The ink can directly seep out from the jet orifice of the nozzle, so that the nozzle can also have the ink flowing out from the jet orifice when the ink does not need to be jetted, and the graphic picture can not be printed normally. Therefore, a negative pressure generating device is needed to generate a negative pressure for balancing siphoning in the ink box, and the ink cannot be sucked back into the ink box and cannot permeate out through the jet hole. When the jet orifice is blocked, positive pressure is required to be applied to the ink box to flush the jet orifice by ink, so that the blocked jet orifice is restored to a normal state.
At present, the traditional negative pressure is formed by a large air storage tank, an air pump and an electromagnetic valve. When the pressure sensor acquires that the internal pressure of the gas storage tank is higher than the set pressure plus the offset pressure, the gas storage tank is connected with the atmospheric pressure by the exhaust solenoid valve, so that the requirement of reducing the negative pressure is met; when the pressure sensor collects that the internal pressure of the gas storage tank is lower than the set pressure to reduce the offset pressure, the negative pressure electromagnetic valve and the negative pressure air pump act together to meet the requirement of increasing the negative pressure. The method uses positive and negative pressure generated by a switch type method, so that an offset pressure is generated, and the working frequency of the exhaust electromagnetic valve, the negative pressure electromagnetic valve and the negative pressure air pump is reduced. Therefore, the technical problems of large pressure fluctuation, long pressure fluctuation recovery time, large volume, high cost, poor universality, low pressure precision, easy damage of accessories and the like of printers of different types are caused.
Therefore, the existing ink-jet printer has the following defects:
(1) the negative pressure is formed by a large gas storage tank, an air pump and an electromagnetic valve, and the large gas storage tank occupies large space and has large volume and high cost;
(2) positive and negative pressure is generated by a switch method, so that the pressure fluctuation is large and the pressure fluctuation recovery time is long;
(3) printers of different models have poor universality, low pressure precision and easily damaged accessories.
In order to overcome the defects, the invention provides a positive and negative pressure control device of an ink-jet printer.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an invention aim at has solved and has had atmospheric pressure fluctuation range big, atmospheric pressure recovery time long, bulky, with high costs, to the printer commonality of different models poor, the pressure precision is low, the easy problem of damaging of spare part among the current ink jet printer. The concrete solution is as follows:
the utility model provides an ink jet printer's positive negative pressure control device, includes the control unit, detection element, pressure unit, the display element that are connected with the control unit electricity respectively, and pressure unit passes through the third trachea and is connected with detection element, and the third trachea is connected with the one end that the trachea connects, and the trachea connects the other end and is connected with the tracheal one end of fourth, and the tracheal other end of fourth is connected with outside printing unit. The control unit is used for controlling the operation of the whole device and outputting constant pressure by the pressure unit, the detection unit is used for detecting positive and negative pressure values, the pressure unit is used for generating positive and negative pressure air pressure, the printing unit comprises a protection device, an ink box and a sprayer, the protection device is connected with the ink box through a fifth air pipe, the ink box is connected with the sprayer through an ink pipe, the protection device is electrically connected with the control unit and used for protecting internal parts of the positive and negative pressure control device from being damaged due to the entering of ink, and the positive and negative pressure control device is arranged inside the shell.
Furthermore, the control unit comprises a main control chip, and a storage chip and a driving chip which are respectively electrically connected with the main control chip.
Furthermore, the detection unit is a positive pressure sensor and a negative pressure sensor, and the positive pressure sensor and the negative pressure sensor are electrically connected with the main control chip.
The pressure unit comprises a negative pressure air pump, a negative pressure electromagnetic valve connected with the negative pressure air pump through a first air pipe, and a negative pressure air saving device arranged between the negative pressure air pump and the negative pressure electromagnetic valve and connected with the first air pipe, wherein the negative pressure electromagnetic valve is electrically connected with the main control chip on one hand and a third air pipe on the other hand, and the negative pressure air pump is electrically connected with the main control chip; the pressure unit further comprises a positive pressure air pump, a positive pressure electromagnetic valve connected with the positive pressure air pump through a second air pipe, and a positive pressure air saving device connected with the second air pipe and arranged between the positive pressure air pump and the positive pressure electromagnetic valve, wherein the positive pressure electromagnetic valve is electrically connected with the main control chip, the positive pressure electromagnetic valve is connected with a third air pipe, and the positive pressure air pump is electrically connected with the main control chip.
Further, the driving chip comprises a motor driving chip and a loudspeaker driving chip, the motor driving chip is electrically connected with a transmission device of the printer, and the loudspeaker driving chip is electrically connected with the loudspeaker.
Furthermore, the display unit comprises an operation panel and a first display screen which are electrically connected with the main control chip, an external operation and a second display screen which are electrically connected with the main control chip through a communication line, wherein a key is arranged on the operation panel, and the key is electrically connected with the main control chip.
Further, the protection device comprises a safety bottle and a floater arranged inside the safety bottle, and the floater is electrically connected with the main control chip.
Optionally, a first positive-negative pressure control device and a second positive-negative pressure control device electrically connected to the main control chip are disposed inside the housing, the first positive-negative pressure control device is configured to generate a constant negative pressure, and the second positive-negative pressure control device is configured to generate a constant negative pressure or a constant positive pressure.
The printing unit comprises a first safety bottle connected with an air pipe joint of a first positive and negative pressure control device through a fourth air pipe, a first ink box connected with the first safety bottle through a fifth air pipe, the first ink box is connected with the output end of the internal circulation sprayer through a first ink pipe, the printing unit further comprises a second safety bottle connected with an air pipe joint of a second positive and negative pressure control device through a fourth air pipe, a second ink box connected with the second safety bottle through a fifth air pipe, and a flow sensor connected with the second ink box through a second ink pipe, the other end of the flow sensor is connected with the input end of the internal circulation sprayer through the second ink pipe, and the flow sensor is electrically connected with the main control chip.
To sum up, adopt the utility model discloses a technical scheme has following beneficial effect:
the scheme solves the problems of large air pressure fluctuation range, long air pressure recovery time, large volume, high cost, poor printer universality for different types, low pressure precision and easy damage of parts in the existing ink-jet printer. The present disclosure provides an apparatus for generating constant positive and negative pressures within an inkjet printer. The main control chip controls the positive and negative pressure sensors, collects pressure changes in the ink box or the safety bottle in real time, calculates and adjusts the rotating speed of the air pump in real time, and generates stable, high-precision, constant and small-fluctuation-range pressure. If the ink in the safety bottle is detected in the process of generating positive pressure and negative pressure, the positive pressure and negative pressure control device locks the pressure output port, so that the ink cannot enter the device, and other parts are damaged. The simultaneous display of the internal operation panel and the external operation panel and the setting of parameters are realized. When the device is abnormal, the alarm code and the alarm prompt are displayed, so that the technical personnel can conveniently and quickly troubleshoot problems, and the troubleshooting time is saved.
The scheme has the following advantages:
(1) the positive and negative pressure generating device has the advantages of high precision, high stability, small pressure fluctuation range and the like, can realize a device with smaller volume without a large-volume gas storage tank in the traditional industry positive and negative pressure generating device, and has the advantages of low cost, small space required during installation, strong universality for different printer types and convenience in production.
(2) After the large-size gas storage tank is removed, the fluctuation recovery time of the positive and negative pressure control device can be greatly shortened.
(3) The positive and negative voltage control device and the printer can be greatly protected, so that the maintenance cost is lower and the loss caused by misoperation is smaller.
(4) The flexibility and the convenience of the operation of the positive and negative pressure control device can be enhanced, and the research and development time of the whole machine is shortened.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed to be used in the description of the embodiments of the present invention will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive faculty.
Fig. 1 is a structural diagram of an embodiment 1 of a positive/negative pressure control device of an ink jet printer according to the present invention;
fig. 2 is a structural view of embodiment 2 of the present invention;
fig. 3 is a structural view of embodiment 3 of the present invention;
fig. 4 is a structural view of embodiment 4 of the present invention;
fig. 5 is a flowchart of a positive/negative pressure control method for an inkjet printer according to the present invention.
Description of reference numerals:
1-negative pressure air pump, 2-positive pressure air pump, 3-negative pressure air throttle device, 4-positive pressure air throttle device, 5-negative pressure electromagnetic valve, 6-positive pressure electromagnetic valve, 7-positive and negative pressure sensor, 8-air pipe joint, 9-memory chip, 10-main control chip, 11-safety bottle, 12-floater, 13-ink box, 14-nozzle, 16-ink pipe, 17-shell, 18-operation panel, 19-external operation panel, 20-communication line, 21-driving chip, 22-first display screen, 23-second display screen, 24-positive and negative pressure control device, 25-flow sensor, 91-first air pipe, 92-second air pipe, 93-third air pipe, 94-fourth air pipe, 95-a fifth air pipe, 100-a control unit, 111-a first safety bottle, 112-a second safety bottle, 131-a first ink box, 132-a second ink box, 140-an internal circulation spray head, 151-a first signal line, 152-a second signal line, 153-a third signal line, 161-a first ink pipe, 162-a second ink pipe, 200-a detection unit, 241-a first positive and negative pressure control device, 242-a second positive and negative pressure control device, 300-a pressure unit, 400-a display unit, 500-a printing unit.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Example 1:
as shown in fig. 1, the positive/negative pressure control device of the inkjet printer includes a control unit 100, a detection unit 200, a pressure unit 300, a printing unit 500, and a display unit 400 electrically connected to the control unit 100, respectively, wherein the pressure unit 300 is connected to the detection unit 200 through a third air pipe 93, the third air pipe 93 is connected to one end of an air pipe joint 8, the other end of the air pipe joint 8 is connected to one end of a fourth air pipe 94, and the other end of the fourth air pipe 94 is connected to an external printing unit 500. The control unit 100 is used for controlling the operation of the whole device (comprising the positive and negative pressure control device 24 and the printing unit 500) and the pressure unit 300 outputs constant pressure, the detection unit 200 is used for detecting positive and negative pressure values, the pressure unit 300 is used for generating positive and negative pressure air pressure, the printing unit 500 comprises a protection device, an ink box 13 and a spray head 14, the protection device is connected with the ink box 13 through a fifth air pipe 95, the ink box 13 is connected with the spray head 14 through an ink pipe 16, the protection device is used for protecting the internal parts of the positive and negative pressure control device 24 from being damaged due to the entering of ink, and the positive and negative pressure control device 24 is arranged inside the shell.
The control unit 100 includes a main control chip 10, a memory chip 9 electrically connected to the main control chip 10, and a driving chip 21.
The detection unit 200 is a positive/negative pressure sensor 7, and the positive/negative pressure sensor 7 is electrically connected to the main control chip 10 (via the second signal line 152).
The pressure unit 300 comprises a negative pressure air pump 1, a negative pressure electromagnetic valve 5 connected with the negative pressure air pump 1 through a first air pipe 91, and a negative pressure air saving device 3 connected with the first air pipe 91 and arranged between the negative pressure air pump 1 and the negative pressure electromagnetic valve 5, wherein the negative pressure electromagnetic valve 5 is electrically connected with the main control chip 10 on one hand, and is connected with a third air pipe 93 on the other hand, and the negative pressure air pump 1 is electrically connected with the main control chip 10.
The pressure unit 300 further includes a positive pressure air pump 2, a positive pressure electromagnetic valve 6 connected with the positive pressure air pump 2 through a second air pipe 92, and a positive pressure air saving device 4 connected with the second air pipe 92 and arranged between the positive pressure air pump 2 and the positive pressure electromagnetic valve 6, wherein the positive pressure electromagnetic valve 6 is electrically connected with the main control chip 10 on the one hand, and is connected with a third air pipe 93 on the other hand, and the positive pressure air pump 2 is electrically connected with the main control chip 10.
The driver chip 21 includes a motor driver chip electrically connected to a transmission (not shown) of the printer and a speaker driver chip (not shown) electrically connected to a speaker (not shown).
The display unit 500 includes the operation panel 18 and the first display screen 22. The operation panel 18 and the first display 22 are electrically connected to the main control chip 10 (via the third signal line 153), respectively. The operation panel 18 is provided with keys (not shown) electrically connected to the main control chip 10.
The protection device comprises a safety bottle 11 and a floater 12 arranged inside the safety bottle 11, wherein the floater 12 is electrically connected with the main control chip 10 (through a first signal line 151).
Example 2:
as shown in fig. 2, the difference from embodiment 1 is that a plurality of sets of negative pressure air pump 1, negative pressure air throttle device 3, negative pressure electromagnetic valve 5, positive pressure air pump 2, positive pressure air throttle device 4, and positive pressure electromagnetic valve 6 are provided in the housing 17, and a plurality of positive and negative pressure sensors 7, a plurality of air pipe joints 8, a plurality of safety bottles 11, a plurality of ink cartridges 13, and a plurality of nozzles 14 are provided, and the connection relationship and the operation principle are similar to those of embodiment 1, and are not described herein again. Embodiment 2 can realize a color inkjet printing function.
Example 3:
as shown in fig. 3, the detection unit 200 and the pressure unit 300 are omitted from the drawing, and different from the embodiment 1, the display unit 400 includes an operation panel 18 and a first display 22, an external operation panel 19 and a second display 23 electrically connected to the main control chip 10 through a communication line 20 (which is an RS-485 interface), and the operation panel 18 and the first display 22 are electrically connected to the main control chip 10 through a third signal line 153. The operation panel 18 is provided with keys (not shown) electrically connected to the main control chip 10. The rest of the process is the same as that of embodiment 1, and will not be described herein.
Example 4:
as shown in fig. 4, unlike embodiment 1, two positive and negative pressure control devices 24, two safety bottles 11, two ink cartridges 13, two ink tubes 16, a flow sensor 25, and an internal circulation head 140 (the internal circulation head 140 has an input end, an output end, and a printing end) are provided, and the specific structure is as follows:
the inside of the housing 17 is provided with a first positive/negative pressure control device 241 and a second positive/negative pressure control device 242 which are electrically connected to the main control chip 10, respectively, the first positive/negative pressure control device 241 is used for generating a constant negative pressure, and the second positive/negative pressure control device 242 is used for generating a constant negative pressure or a constant positive pressure.
The external printing unit 500 includes a first safety bottle 111 connected to the air pipe connector 8 of the first positive and negative pressure control device 241 through a fourth air pipe 94, a first ink cartridge 131 connected to the first safety bottle 111 through a fifth air pipe 95, the first ink cartridge 131 being connected to the output end of the internal circulation head 140 through a first ink pipe 161, a second safety bottle 112 connected to the air pipe connector 8 of the second positive and negative pressure control device 242 through the fourth air pipe 94, a second ink cartridge 132 connected to the second safety bottle 112 through the fifth air pipe 95, a flow sensor 25 connected to the second ink cartridge 132 through a second ink pipe 162, the other end of the flow sensor 25 being connected to the input end of the internal circulation head 140 through the second ink pipe 162, and the flow sensor 25 being electrically connected to the main control chip 10. The working process is as follows: the first positive and negative pressure control device 241 is connected to the first ink cartridge 131 through the first safety bottle 111, so that a larger negative pressure is generated in the first ink cartridge 131; the second positive and negative pressure control device 242 is connected to the second ink tank 132 through the second safety bottle 112, so that a smaller negative pressure is generated in the second ink tank 132, and the ink in the second ink tank 132 flows into the first ink tank 131 through the second ink tube 162, the flow sensor 25, the second ink tube 162, the internal circulation nozzle 140 and the first ink tube 161 due to the pressure difference, thereby achieving the circulation effect of the internal circulation nozzle 140 and ensuring that the pressure in the internal circulation nozzle 140 keeps constant and accurate pressure. The flow sensor 25 is used to detect the circulation flow from the second ink tank 132 to the internal circulation nozzle 140 and back to the first ink tank 131, when the flow cannot satisfy the circulation flow of the internal circulation nozzle 140, in order to meet the requirement of the circulation flow of the internal circulation nozzle 140, the second positive/negative pressure control device 242 switches (via the main control chip 10) to output positive pressure so as to increase the circulation flow of the internal circulation nozzle 140, and the flowing ink flows the bubbles and fine impurities inside the internal circulation nozzle 140 out of the internal circulation nozzle 140 through the first ink pipe 161. Through accurate pressure adjustment, the use of the inner circulation nozzle 140 is more stable, and the printing is smoother.
As shown in fig. 5, the positive/negative pressure control method of an inkjet printer based on the positive/negative pressure control device of an inkjet printer comprises the following steps:
s1, the main control chip 10 collects the state of the floater 12 in the safety bottle 11 through the first signal line 151, and detects whether ink enters the safety bottle 11;
s2, if there is ink, the main control chip 10 closes the positive pressure air pump 2, the positive pressure electromagnetic valve 6, the negative pressure air pump 1 and the negative pressure electromagnetic valve 5 at the same time, protects the internal parts of the positive and negative pressure control device from being damaged by entering the ink, and simultaneously alarms the operator to remove the ink;
s3, whether the ink in the safety bottle 11 is removed or not is judged, if not, the step is S2, and if yes, the next step is carried out;
s4, reading the parameters in the memory chip 9 and receiving the setting parameters from the operation panel 18 or the external operation panel 19;
s5, detecting whether the external positive and negative pressure switch button (the button is arranged on the operation panel 18 and is not shown in the figure) needs to switch the positive and negative pressure;
s6, if positive pressure is needed, the positive pressure solenoid valve 6 and the positive pressure air pump 2 connected through the second air tube 92 generate positive pressure, and the printing unit 500 is connected through the air tube connector 8;
s7, if negative pressure is needed, generating negative pressure through the negative pressure solenoid valve 5 and the negative pressure air pump 1 connected with the first air pipe 91, and connecting with the printing unit 400 through the air pipe joint 8;
s8, the positive and negative pressure sensor 7 collects the internal pressure of the safety bottle 11 or the ink box 13 in real time through the third air pipe 93, the main control chip 10 reads the real-time pressure through the second signal line 152, calculates the rotating speed control quantity of the negative pressure air pump 1 or the positive pressure air pump 2 according to the setting parameters, adjusts the internal pressure of the safety bottle 11 or the ink box 13 in real time through the rotating speed, accurately and constantly fixes the pressure at the setting pressure, so that the pressure fluctuation on the spray head 14 is reduced to the minimum, and the printing effect is improved;
s9, controlling the air flow of the positive pressure air pump 2 and the negative pressure air pump 1 through the positive pressure air throttle device 4 and the negative pressure air throttle device 3, enabling the air pumps (including the positive pressure air pump 2 and the negative pressure air pump 1) to work in a proper pressure range, and increasing the stability and the service life of the whole system to the maximum extent;
and S10, monitoring the state and pressure state of the whole system in real time, and when the air pump works abnormally, air leaks from the air pipes (including the first air pipe 91, the second air pipe 92, the third air pipe 93, the fourth air pipe 94 and the fifth air pipe 95) and ink in the safety bottle 11 is in problem, immediately sending out an alarm sound by the positive and negative pressure control device 24, displaying an alarm code and prompting an operator to quickly troubleshoot the problems.
To sum up, adopt the utility model discloses a technical scheme has following beneficial effect:
the scheme solves the problems of large air pressure fluctuation range, long air pressure recovery time, large volume, high cost, poor printer universality for different types, low pressure precision and easy damage of parts in the existing ink-jet printer. The present disclosure provides an apparatus for generating constant positive and negative pressures within an inkjet printer. The main control chip controls the positive and negative pressure sensors, collects pressure changes in the ink box or the safety bottle in real time, calculates and adjusts the rotating speed of the air pump in real time, and generates stable, high-precision, constant and small-fluctuation-range pressure. If the ink in the safety bottle is detected in the process of generating positive pressure and negative pressure, the positive pressure and negative pressure control device locks the pressure output port, so that the ink cannot enter the device, and other parts are damaged. The simultaneous display of the internal operation panel and the external operation panel and the setting of parameters are realized. When the device is abnormal, the alarm code and the alarm prompt are displayed, so that the technical personnel can conveniently and quickly troubleshoot problems, and the troubleshooting time is saved.
The scheme has the following advantages:
(1) the positive and negative pressure generating device has the advantages of high precision, high stability, small pressure fluctuation range and the like, can realize a device with smaller volume without a large-volume gas storage tank in the traditional industry positive and negative pressure generating device, and has the advantages of low cost, small space required during installation, strong universality for different printer types and convenience in production.
(2) After the large-size gas storage tank is removed, the fluctuation recovery time of the positive and negative pressure control device can be greatly shortened.
(3) The positive and negative voltage control device and the printer can be greatly protected, so that the maintenance cost is lower and the loss caused by misoperation is smaller.
(4) The flexibility and the convenience of the operation of the positive and negative pressure control device can be enhanced, and the research and development time of the whole machine is shortened.
The above-described embodiments do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the above-described embodiments should be included in the protection scope of the technical solution.
Claims (9)
1. A positive/negative pressure control device for an ink jet printer, comprising: the printing device comprises a control unit, a detection unit, a pressure unit and a display unit, wherein the detection unit, the pressure unit and the display unit are respectively electrically connected with the control unit; the control unit is used for controlling the operation of the whole device and outputting constant pressure by the pressure unit, the detection unit is used for detecting positive and negative pressure values, the pressure unit is used for generating positive and negative pressure air pressure, the printing unit comprises a protection device, an ink box and a sprayer, the protection device is connected with the ink box through a fifth air pipe, the ink box is connected with the sprayer through an ink pipe, the protection device is electrically connected with the control unit and used for protecting internal parts of the positive and negative pressure control device from being damaged due to the entering of ink, and the positive and negative pressure control device is arranged inside the shell.
2. The positive/negative voltage control apparatus of an ink jet printer according to claim 1, characterized in that: the control unit comprises a main control chip, and a storage chip and a drive chip which are respectively electrically connected with the main control chip.
3. The positive/negative voltage control apparatus of an ink jet printer according to claim 2, characterized in that: the detection unit is a positive pressure sensor and a negative pressure sensor which are electrically connected with the main control chip.
4. The positive/negative voltage control apparatus of an ink jet printer according to claim 3, characterized in that: the pressure unit comprises a negative pressure air pump, a negative pressure electromagnetic valve connected with the negative pressure air pump through a first air pipe, and a negative pressure air saving device arranged between the negative pressure air pump and the negative pressure electromagnetic valve and connected with the first air pipe, wherein the negative pressure electromagnetic valve is electrically connected with the main control chip on one hand and a third air pipe on the other hand, and the negative pressure air pump is electrically connected with the main control chip; the pressure unit further comprises a positive pressure air pump, a positive pressure electromagnetic valve connected with the positive pressure air pump through a second air pipe, and a positive pressure air saving device connected with the second air pipe and arranged between the positive pressure air pump and the positive pressure electromagnetic valve, wherein the positive pressure electromagnetic valve is electrically connected with the main control chip, the positive pressure electromagnetic valve is connected with a third air pipe, and the positive pressure air pump is electrically connected with the main control chip.
5. The positive/negative voltage control apparatus of an ink jet printer according to claim 4, characterized in that: the drive chip comprises a motor drive chip and a horn drive chip, the motor drive chip is electrically connected with a transmission device of the printer, and the horn drive chip is electrically connected with the horn.
6. The positive/negative voltage control apparatus of an ink jet printer according to claim 5, characterized in that: the display unit comprises an operation panel and a first display screen which are electrically connected with the main control chip, an external operation and a second display screen which are electrically connected with the main control chip through a communication line, wherein a key is arranged on the operation panel, and the key is electrically connected with the main control chip.
7. The positive/negative voltage control apparatus of an ink jet printer according to claim 6, characterized in that: the protection device comprises a safety bottle and a floater arranged in the safety bottle, and the floater is electrically connected with the main control chip.
8. The positive/negative voltage control apparatus of an ink jet printer according to claim 7, characterized in that: the shell is internally provided with a first positive and negative pressure control device and a second positive and negative pressure control device which are respectively electrically connected with the main control chip, the first positive and negative pressure control device is used for generating constant negative pressure, and the second positive and negative pressure control device is used for generating constant negative pressure or constant positive pressure.
9. The positive/negative voltage control apparatus of an ink jet printer according to claim 8, wherein: the printing unit comprises a first safety bottle connected with an air pipe joint of a first positive and negative pressure control device through a fourth air pipe, a first ink box connected with the first safety bottle through a fifth air pipe, the first ink box is connected with the output end of the internal circulation sprayer through a first ink pipe, the printing unit further comprises a second safety bottle connected with an air pipe joint of a second positive and negative pressure control device through a fourth air pipe, a second ink box connected with the second safety bottle through a fifth air pipe, and a flow sensor connected with the second ink box through a second ink pipe, the other end of the flow sensor is connected with the input end of the internal circulation sprayer through the second ink pipe, and the flow sensor is electrically connected with the main control chip.
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| CN202021476198.8U CN212289182U (en) | 2020-07-23 | 2020-07-23 | Positive and negative pressure control device of ink-jet printer |
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| CN202021476198.8U CN212289182U (en) | 2020-07-23 | 2020-07-23 | Positive and negative pressure control device of ink-jet printer |
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