CN216915258U - Ink supply system with negative pressure control - Google Patents
Ink supply system with negative pressure control Download PDFInfo
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- CN216915258U CN216915258U CN202123433684.9U CN202123433684U CN216915258U CN 216915258 U CN216915258 U CN 216915258U CN 202123433684 U CN202123433684 U CN 202123433684U CN 216915258 U CN216915258 U CN 216915258U
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Abstract
The utility model discloses an ink supply system with negative pressure control, which comprises a spray head, an ink box, an air storage device, a pressure sensor and a pressure control assembly, wherein the spray head, the ink box, the air storage device and the pressure control assembly are sequentially communicated; the air storage device is communicated with the ink box to enable air pressure in the air storage device and the ink box to be equal, the ink liquid level in the ink box is reduced after ink is jetted by the nozzle, the negative pressure in the ink box is increased, the air storage device serves as an air pressure buffering device to enable the negative pressure in the ink box to change more smoothly, and the pressure control assembly is used for adjusting the air pressure in the air storage device to ensure that the air pressure in the air storage device is within a preset air pressure range for a long time.
Description
Technical Field
The utility model relates to the field of ink jet devices, in particular to an ink supply system with negative pressure control.
Background
At present, an ink jet printer with a piezoelectric nozzle adopts a siphon principle to suck ink in an ink box to the nozzle, and certain negative pressure is generated to enable the ink at the nozzle to form a crescent which is concave towards the nozzle, so that the ink jet printer is suitable for the piezoelectric nozzle to jet the ink. However, the siphon principle is adopted to supply ink, which is easily affected by the ambient temperature, the height difference between the nozzle and the ink box and the change of the atmospheric pressure, and the ink-jet speed and the ink-jet precision are affected.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims to provide an ink supply system with negative pressure control, so as to solve the problem that the conventional ink supply device cannot form stable negative pressure in a spray head.
The purpose of the utility model is realized by adopting the following technical scheme:
an ink supply system with negative pressure control comprises a spray head, an ink box, an air storage device, a pressure sensor and a pressure control assembly;
the sprayer, the ink box, the air storage device and the pressure control assembly are sequentially communicated, the pressure sensor is communicated with the air storage device, and the pressure control assembly is used for adjusting air pressure in the air storage device.
In some optional embodiments, the pressure control assembly includes a first air pump and a second air pump, both of which are connected to the air storage device, the first air pump is configured to discharge air in the air storage device to the outside, and the second air pump is configured to suck air from the outside to the air storage device.
In some optional embodiments, the pressure control assembly further includes a first control valve, the first control valve is located between the gas storage device and the first air pump, and two ends of the first control valve are respectively communicated with the gas storage device and the first air pump.
In some optional embodiments, the pressure control assembly further includes a second control valve, the second control valve is located between the gas storage device and the second air pump, and two ends of the second control valve are respectively communicated with the gas storage device and the second air pump.
In some optional embodiments, the ink container further comprises an ink tank and an ink supply pump, and two ends of the ink supply pump are respectively communicated with the ink tank and the ink box.
In certain alternative embodiments, a liquid level sensor is provided within the ink cartridge.
In some optional embodiments, the ink cartridge further comprises a gas tube, and the gas storage device is communicated with the top end of the ink cartridge through the gas tube.
In some optional embodiments, the ink cartridge further comprises a liquid guide pipe, and the spray head is communicated with the bottom end of the ink cartridge through the liquid guide pipe.
Compared with the prior art, the utility model has the beneficial effects that:
the air storage device is communicated with the ink box to enable air pressure in the air storage device and the ink box to be equal, the ink liquid level in the ink box is reduced after ink is jetted by the nozzle, the negative pressure in the ink box is increased, the air storage device serves as an air pressure buffering device to enable the negative pressure in the ink box to change more smoothly, and the pressure control assembly is used for adjusting the air pressure in the air storage device to ensure that the air pressure in the air storage device is within a preset air pressure range for a long time.
Drawings
FIG. 1 is a schematic structural diagram of an ink supply system with negative pressure control;
in the figure:
10. a spray head; 20. an ink cartridge; 21. a liquid level sensor; 30. a gas storage device; 40. a pressure sensor; 50. a pressure control assembly; 51. a first air pump; 52. a second air pump; 53. a first control valve; 54. a second control valve; 60. an ink tank; 70. an ink supply pump.
Detailed Description
To facilitate an understanding of the utility model, the utility model will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, the ink supply system with negative pressure control according to the present invention is schematically shown, and includes a nozzle 10, an ink cartridge 20, an air storage device 30, a pressure sensor 40, and a pressure control assembly 50.
The nozzle 10, the ink cartridge 20, the air storage device 30 and the pressure control assembly 50 are sequentially communicated, the pressure sensor 40 is communicated with the air storage device 30, the ink cartridge 20 is used for storing ink for the nozzle 10 to suck, the nozzle 10 can adopt the existing piezoelectric nozzle 10, the piezoelectric crystal is deformed to extrude the ink to be sprayed, and the pressure control assembly 50 is used for adjusting air pressure in the air storage device 30. The air reservoir 30 communicates with the ink cartridge 20 to equalize the air pressure therein. After the nozzle 10 ejects ink, the liquid level of ink in the ink cartridge 20 decreases, which increases the negative pressure in the ink cartridge 20, the air storage device 30 can make the negative pressure in the ink cartridge 20 change more smoothly as an air pressure buffer device, and the pressure control assembly 50 adjusts the air pressure in the air storage device 30 to ensure that the air pressure in the air storage device 30 is within the preset air pressure range for a long time.
The pressure control assembly 50 includes a first air pump 51 and a second air pump 52, both the first air pump 51 and the second air pump 52 are connected to the air storage device 30, the first air pump 51 is used for discharging the air in the air storage device 30 to the outside, that is, the first air pump 51 is used for generating negative pressure in the system, and the second air pump 52 is used for pumping the air from the outside to the air storage device 30, that is, the second air pump 52 is used for generating positive pressure in the system. The ink supply system with negative pressure control further comprises a control device, the control device can be a single chip microcomputer or a programmable controller, the control device is electrically connected to the pressure sensor 40, the first air pump 51 and the second air pump 52, when the pressure sensor 40 detects that the air pressure value in the air storage device 30 is larger than a preset air pressure value, it indicates that the air pressure in the air storage device 30 is too large, the control device calculates the time for the first air pump 51 to work through a Proportion Integration Differential (PID) algorithm, and controls the first air pump 51 to start to work. When the pressure sensor 40 detects that the air pressure value in the air storage device 30 is smaller than the preset air pressure value, which indicates that the air pressure in the air storage device 30 is too small, the control device calculates the time for the second air pump 52 to operate through the PID algorithm, and controls the second air pump 52 to start to operate. Through continuous detection, calculation and comparison, the air pressure in the air storage device 30 and the preset air pressure value are finally within the allowable error range, and the air in the air storage device 30 can be kept at the pressure required by the system, so that the ink at the nozzle 10 can form an inward concave crescent.
Further, the pressure control assembly 50 further includes a first control valve 53 and a second control valve 54, the first control valve 53 is located between the air storage device 30 and the first air pump 51, and two ends of the first control valve 53 are respectively communicated with the air storage device 30 and the first air pump 51, the first control valve 53 is preferably a two-way valve, and the first control valve 53 is used for controlling the communication and disconnection between the first air pump 51 and the air storage device 30. Similarly, the second control valve 54 is located between the gas storage device 30 and the second air pump 52, two ends of the second control valve 54 are respectively communicated with the gas storage device 30 and the second air pump 52, the second control valve 54 is preferably a two-way valve, and the second control valve 54 is used for controlling the communication and disconnection between the second air pump 52 and the gas storage device 30.
In order to replenish ink into the ink box 20, the ink supply system with negative pressure control further comprises an ink box 60 and an ink supply pump 70, two ends of the ink supply pump 70 are respectively communicated with the ink box 60 and the ink box 20, a liquid level sensor 21 is arranged in the ink box 20, and the control device is respectively and electrically connected with the ink supply pump 70 and the liquid level sensor 21. When the head 10 is operated, the ink in the ink cartridge 20 is gradually consumed, and when the liquid level sensor 21 detects that the amount of ink in the ink cartridge 20 is too low, the control device controls the ink supply pump 70 to be started to pump the ink in the ink tank 60 to the ink cartridge 20 until the liquid level sensor 21 detects that the amount of ink in the ink cartridge 20 reaches a preset maximum ink amount value.
Preferably, the ink supply system with negative pressure control further includes an air duct, the air storage device 30 is connected to the top end of the ink cartridge 20 through the air duct, and this structure can prevent the ink in the ink cartridge 20 from being pumped into the air storage device 30 through the air duct.
Preferably, the ink supply system with negative pressure control further comprises a liquid guide tube, the spray head 10 is communicated with the bottom end of the ink box 20 through the liquid guide tube, and when the negative pressure value in the ink box 20 reaches a certain state, the ink in the ink box 20 flows to the spray head 10 through the liquid guide tube under the action of gravity.
Compared with the prior art, the utility model has the beneficial effects that:
the air storage device 30 is communicated with the ink box 20 to equalize air pressure in the air storage device and the ink box 20, so that the liquid level of the ink in the ink box 20 is reduced after the ink is jetted by the nozzle 10, the negative pressure in the ink box 20 is increased, the air storage device 30 serves as an air pressure buffer device to enable the negative pressure in the ink box 20 to change more smoothly, and the pressure control assembly 50 is used for adjusting the air pressure in the air storage device 30 to ensure that the air pressure in the air storage device 30 is within a preset air pressure range for a long time.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. An ink supply system with negative pressure control is characterized by comprising a spray head, an ink box, an air storage device, a pressure sensor and a pressure control assembly;
the sprayer, the ink box, the air storage device and the pressure control assembly are sequentially communicated, the pressure sensor is communicated with the air storage device, and the pressure control assembly is used for adjusting air pressure in the air storage device.
2. The ink supply system with negative pressure control as claimed in claim 1, wherein the pressure control assembly comprises a first air pump and a second air pump, the first air pump and the second air pump are both connected to the air storage device, the first air pump is used for exhausting air in the air storage device to the outside, and the second air pump is used for pumping air from the outside to the air storage device.
3. The system of claim 2, wherein the pressure control assembly further comprises a first control valve, the first control valve is located between the air storage device and the first air pump, and two ends of the first control valve are respectively connected to the air storage device and the first air pump.
4. The ink supply system with negative pressure control as claimed in claim 2, wherein the pressure control assembly further comprises a second control valve, the second control valve is located between the air storage device and the second air pump, and two ends of the second control valve are respectively connected to the air storage device and the second air pump.
5. The ink supply system with negative pressure control according to claim 1, further comprising an ink tank and an ink supply pump, both ends of the ink supply pump being communicated with the ink tank and the ink cartridge, respectively.
6. The ink supply system with negative pressure control as claimed in claim 5, wherein a liquid level sensor is provided in the ink tank.
7. The ink supply system with negative pressure control according to claim 1, further comprising an air tube, wherein the air storage device is communicated with the top end of the ink cartridge through the air tube.
8. The ink supply system with negative pressure control as claimed in claim 1, further comprising a liquid guide tube, wherein the spray head is communicated with the bottom end of the ink cartridge through the liquid guide tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123433684.9U CN216915258U (en) | 2021-12-30 | 2021-12-30 | Ink supply system with negative pressure control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123433684.9U CN216915258U (en) | 2021-12-30 | 2021-12-30 | Ink supply system with negative pressure control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216915258U true CN216915258U (en) | 2022-07-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123433684.9U Active CN216915258U (en) | 2021-12-30 | 2021-12-30 | Ink supply system with negative pressure control |
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| Country | Link |
|---|---|
| CN (1) | CN216915258U (en) |
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2021
- 2021-12-30 CN CN202123433684.9U patent/CN216915258U/en active Active
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