Ink circulating device capable of supporting multiple nozzles

Abstract

The utility model belongs to the technical field of ink-jet printers, and discloses an ink circulating device capable of supporting a plurality of nozzles, which comprises a circulating ink box, a circulating pump and a negative pressure box, and is characterized in that the inside of the circulating ink box is divided into a positive bin and a negative bin which are mutually independent; the positive bin is communicated with a spray head of the ink-jet printing head through a first pipeline and is used for supplying ink required by ink jet to the spray head through the positive bin; the negative bin is communicated with a nozzle of the ink-jet printing head through a second pipeline, and the negative pressure box is connected with the negative bin and used for adjusting the internal pressure of the negative bin through the negative pressure box, so that ink in the positive bin flows to the negative bin through the nozzle under the differential pressure effect; an inlet of the circulating pump is communicated with the negative bin through a third pipeline, and an outlet of the circulating pump is communicated with the positive bin through a fourth pipeline. The ink circulation function of the ink-jet printing head provides stable circulation pressure for the ink-jet printing head, the maintenance frequency is reduced, and the use experience of the ink-jet printing head is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of inkjet printers, and in particular relates to an ink circulation device capable of supporting multiple nozzles. Background Art

[0002] Inkjet printers turn colored liquid ink into tiny particles through nozzles and spray them onto printing paper. Some inkjet printers have three or four print heads to print yellow, magenta, cyan and black; some share one print head and print in four colors.

[0003] The inkjet print heads of existing inkjet printers basically supply ink once. After the ink is used up, the machine is shut down for resupply. During actual use, the maintenance frequency increases due to insufficient ink, which in turn affects the user experience. Therefore, it is necessary to make improvements. Utility Model Content

[0004] The purpose of the utility model is to provide an ink circulation device that can support multiple nozzles to solve the above-mentioned problems existing in the prior art.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An ink circulation device that can support multiple nozzles includes a circulating ink cartridge, a circulating pump and a negative pressure cartridge. The interior of the circulating ink cartridge is divided into a positive chamber and a negative chamber that are independent of each other; the positive chamber is connected to the nozzle of the inkjet print head through a first pipe, so as to supply the ink required for inkjet printing to the nozzle through the positive chamber; the negative chamber is connected to the nozzle of the inkjet print head through a second pipe, and the negative pressure cartridge is connected to the negative chamber, so as to adjust the internal pressure of the negative chamber through the negative pressure cartridge, thereby allowing the ink in the positive chamber to flow through the nozzle to the negative chamber under the effect of differential pressure; the inlet of the circulating pump is connected to the negative chamber through a third pipe, and the outlet of the circulating pump is connected to the positive chamber through a fourth pipe.

[0007] As a preferred technical solution in the present invention, the main chamber is connected to the outlet of the ink supply pump through a fifth pipe, and a main chamber liquid level sensing switch is installed in the main chamber to control the ink supply pump to supply ink into the main chamber.

[0008] As a preferred technical solution in the present invention, a negative tank liquid level sensing switch is installed in the negative tank to control the circulation pump to draw the ink in the negative tank into the positive tank.

[0009] As a preferred technical solution in the present invention, a filter is installed on the third pipe and / or the fourth pipe.

[0010] As a preferred technical solution in the present invention, the nozzle is electrically connected to a nozzle control board for controlling its inkjet through a PCB program.

[0011] As a preferred technical solution in the present invention, the main chamber is also connected to the safety bottle through a sixth pipeline, and a control valve is installed on the sixth pipeline.

[0012] As a preferred technical solution in the present invention, the control valve is a solenoid valve, and a safety bottle liquid level sensing switch for controlling the closing of the solenoid valve is installed in the safety bottle.

[0013] Beneficial effect: The utility model separates the circulating ink cartridge into mutually independent positive chamber and negative chamber, so that the ink can circulate between the positive chamber and the negative chamber, and the ink required for inkjet is supplied to the nozzle through the positive chamber to ensure normal printing; the negative chamber is connected to a negative pressure box, and the pressure can be adjusted by the negative pressure box to make the pressure in the negative chamber lower than that in the positive chamber. The ink in the positive chamber flows to the negative chamber due to the pressure difference, and the ink flow speed can be adjusted by adjusting the pressure of the negative pressure box to achieve the required flow rate of the inkjet print head; the positive chamber and the negative chamber are connected in combination with a circulating pump. When the ink in the positive chamber flows to the negative chamber and reaches the liquid level of the negative chamber, the circulating pump works and the ink returns from the negative chamber to the positive chamber through the circulating pump until the ink amount in the negative chamber is lower than the liquid level, thereby realizing the ink circulation function, providing a stable circulation pressure for the inkjet print head, reducing the number of maintenance times, and improving the user experience of the inkjet print head. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Figure 2 It is a schematic diagram of one side of the utility model;

[0016] Figure 3 It is a schematic diagram of the other side of the utility model;

[0017] Figure 4 It is a three-dimensional schematic diagram of the present utility model.

[0018] In the figure: 1-circulating ink cartridge; 101-positive chamber; 102-negative chamber; 2-circulating pump; 3-negative pressure box; 4-printer; 5-filter; 6-printer control board; 7-safety bottle; 8-solenoid valve. DETAILED DESCRIPTION

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be briefly introduced below in conjunction with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the structures of the drawings is only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention.

[0020] Example:

[0021] like Figures 1-4 As shown, this embodiment provides an ink circulation device that can support multiple nozzles, including a circulating ink cartridge 1, a circulating pump 2 and a negative pressure cartridge 3. The interior of the circulating ink cartridge 1 is divided into a positive chamber 101 and a negative chamber 102 that are independent of each other, so that the ink circulates between the positive chamber 101 and the negative chamber 102; the positive chamber 101 is connected to the nozzle 4 of the inkjet print head through a first pipe, so as to supply the ink required for the nozzle 4 to eject ink through the positive chamber 101, thereby ensuring normal printing; the negative chamber 102 is connected to the nozzle 4 of the inkjet print head through a second pipe, and the negative pressure cartridge 3 is connected to the negative chamber 102, so as to adjust the pressure of the inkjet print head through the negative pressure cartridge 3. The internal pressure of the negative chamber 102 is increased, so that the ink in the positive chamber 101 flows to the negative chamber 102 through the nozzle 4 under the effect of differential pressure. In practice, the pressure in the negative chamber can be adjusted to be lower than that in the positive chamber. The ink in the positive chamber flows to the negative chamber due to the pressure difference. The pressure of the negative pressure box can be adjusted to adjust the ink flow rate to achieve the required flow rate of the inkjet print head. The inlet of the circulation pump 2 is connected to the negative chamber 102 through a third pipe, and the outlet of the circulation pump 2 is connected to the positive chamber 101 through a fourth pipe. When the ink in the positive chamber flows to the negative chamber and reaches the liquid level of the negative chamber, the circulation pump works and the ink returns to the positive chamber from the negative chamber through the circulation pump until the ink amount in the negative chamber is lower than the liquid level.

[0022] The utility model separates the circulating ink cartridge 1 into a positive tank 101 and a negative tank 102 which are independent of each other, so that the ink can circulate between the positive tank 101 and the negative tank 102, and the ink required for inkjet is supplied to the nozzle 4 through the positive tank 101, thereby ensuring normal printing; the negative tank 102 is connected to the negative pressure box 3, and the pressure can be adjusted by the negative pressure box 3 so that the pressure in the negative tank is lower than that in the positive tank. The ink in the positive tank flows to the negative tank due to the pressure difference, and the ink flow speed can be adjusted by adjusting the pressure of the negative pressure box to achieve the flow rate required by the inkjet print head; the positive tank 101 and the negative tank 102 are connected in combination with the circulating pump 2. When the ink in the positive tank flows to the negative tank and reaches the liquid level of the negative tank, the circulating pump works and the ink returns from the negative tank to the positive tank through the circulating pump until the ink amount in the negative tank is lower than the liquid level, thereby realizing the ink circulation function which provides a stable circulation pressure for the inkjet print head, reduces the number of maintenance times, and improves the user experience of the inkjet print head.

[0023] As a preferred implementation scheme in this embodiment, it needs to be further explained that the main tank 101 is connected to the outlet of the ink supply pump through a fifth pipe, and a main tank liquid level sensing switch is installed in the main tank 101 to control the ink supply pump to supply ink into the main tank 101. The ink supply pump is controlled by the main tank liquid level sensing switch. When the liquid level of the main tank 101 is lower than the preset value of the main tank liquid level sensing switch, ink is supplied to the main tank 101 of the circulating ink cartridge 1.

[0024] As a preferred implementation scheme in this embodiment, it needs to be further explained that a negative tank liquid level sensing switch is installed in the negative tank 102 to control the circulation pump 2 to draw the ink in the negative tank 102 into the positive tank 101. When the ink in the positive tank 101 flows to the negative tank 102 and reaches the liquid level of the negative tank, the circulation pump 2 works, and the ink returns from the negative tank 102 to the positive tank 101 through the circulation pump 2 until the amount of ink in the negative tank 101 is lower than the liquid level value preset by the negative tank liquid level sensing switch.

[0025] As a preferred implementation scheme in this embodiment, it needs to be further explained that a filter 5 is installed on the third pipe and / or the fourth pipe to filter impurities in the circulation process.

[0026] As a preferred implementation scheme in this embodiment, it needs to be further explained that the nozzle 4 is electrically connected to a nozzle control board 6 for controlling its inkjet through a PCB program, thereby achieving precise control of the inkjet.

[0027] As a preferred implementation scheme in this embodiment, it needs to be further explained that the main tank 101 is also connected to the safety bottle 7 through a sixth pipe, and a control valve is installed on the sixth pipe. When the faulty ink flows back to the safety bottle, after the liquid level in the safety bottle 7 reaches a certain level, the control valve can be closed to prevent the ink from continuing to flow back.

[0028] As a preferred implementation scheme in this embodiment, it needs to be further explained that the control valve is a solenoid valve 8, and a safety bottle liquid level sensing switch for controlling the closing of the solenoid valve 8 is installed in the safety bottle 7. When the faulty ink flows back to the safety bottle 7 and the liquid level is higher than the preset value of the safety bottle liquid level sensing switch, the safety bottle liquid level sensing switch can control the solenoid valve to close automatically, thereby quickly preventing the ink from continuing to flow back.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. An ink circulation device that can support multiple nozzles, characterized in that: The invention comprises a circulating ink cartridge (1), a circulating pump (2) and a negative pressure cartridge (3); the interior of the circulating ink cartridge (1) is divided into a positive chamber (101) and a negative chamber (102) which are independent of each other; The main chamber (101) is connected to the nozzle (4) of the inkjet print head through a first pipe, so as to supply the ink required for the nozzle (4) to eject ink through the main chamber (101); The negative chamber (102) is connected to the nozzle (4) of the inkjet print head via a second pipe, and the negative pressure box (3) is connected to the negative chamber (102) for adjusting the internal pressure of the negative chamber (102) via the negative pressure box (3), thereby allowing the ink in the positive chamber (101) to flow through the nozzle (4) to the negative chamber (102) under the effect of differential pressure; The inlet of the circulation pump (2) is connected to the negative chamber (102) through a third pipe, and the outlet of the circulation pump (2) is connected to the positive chamber (101) through a fourth pipe.

2. The ink circulation device capable of supporting multiple nozzles according to claim 1, characterized in that: The main chamber (101) is connected to the outlet of the ink supply pump through a fifth pipe, and a main chamber liquid level sensing switch is installed in the main chamber (101) for controlling the ink supply pump to supply ink into the main chamber (101).

3. The ink circulation device capable of supporting multiple nozzles according to claim 1, characterized in that: The negative tank (102) is equipped with a negative tank liquid level sensing switch for controlling a circulating pump (2) to pump ink in the negative tank (102) into the positive tank (101).

4. The ink circulation device capable of supporting multiple nozzles according to claim 1, characterized in that: A filter (5) is installed on the third pipeline and / or the fourth pipeline.

5. The ink circulation device capable of supporting multiple nozzles according to claim 1, characterized in that: The nozzle (4) is electrically connected to a nozzle control board (6) for controlling inkjet through a PCB program.

6. The ink circulation device capable of supporting multiple nozzles according to claim 1, characterized in that: The main chamber (101) is also connected to the safety bottle (7) through a sixth pipeline, and a control valve is installed on the sixth pipeline.

7. The ink circulation device capable of supporting multiple nozzles according to claim 6, characterized in that: The control valve is a solenoid valve (8), and a safety bottle liquid level sensing switch for controlling the closing of the solenoid valve (8) is installed in the safety bottle (7).

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