Secondary ink box assembly for printer

Abstract

The secondary ink box assembly for the printer comprises a secondary ink box body, the secondary ink box body comprises an ink box body and an ink box cover which are mutually sealed and covered, a high-pressure ink cavity, a low-pressure ink cavity and a normal-pressure ink cavity are formed in the ink box body, and the high-pressure ink cavity, the low-pressure ink cavity and the normal-pressure ink cavity are each provided with a liquid level sensor. The high-pressure ink cavity is sequentially communicated with the printing spray head, the low-pressure ink cavity, the normal-pressure ink cavity, the second ink pump, the bubble removing device and the first ink pump, so that ink flows out of the high-pressure ink cavity, sequentially flows through the printing spray head, the low-pressure ink cavity, the second ink pump, the normal-pressure ink cavity, the first ink pump and the bubble removing device and then flows back into the high-pressure ink cavity, and therefore a self-circulation ink path is formed. According to the secondary ink box, ink between the secondary ink box body and the printing spray head keeps continuous circulating flow, precipitation is avoided, the temperature of the ink entering the printing spray head is appropriate and constant, the bubble content is small, pressure fluctuation is small, and therefore the printing quality is higher, and the printing effect is better.

Description

Technical Field

[0001] The invention relates to the technical field of inkjet printing equipment, and in particular to a secondary ink cartridge assembly for a printer. Background Art

[0002] Inkjet printers use print heads to spray ink droplets onto print media to print patterns or text. During the printing process, the ink may be mixed with bubbles when it flows through various components. Bubbles can easily cause the print heads to spray empty, which can cause short lines in the printed image and affect the print quality.

[0003] To solve this problem, the prior art usually sets a degassing device between the main ink tank and the secondary ink cartridge. For example, the circulating degassing system control system disclosed in Chinese patent CN222116364U includes a degassing mold, which is arranged between the primary ink cartridge (i.e., the main ink tank) and the secondary ink cartridge; an ink inlet pump, the input pipeline is arranged at the output pipe port of the primary ink cartridge, and the output pipeline is arranged at the inlet end of the degassing mold; a negative pressure control box is connected to the interface of the degassing mold. The aforementioned prior art sets a degassing mold between the primary ink cartridge and the secondary ink cartridge, and degasses the ink that is about to enter the secondary ink cartridge before entering the secondary ink cartridge, thereby reducing the bubble content in the secondary ink cartridge and reducing the occurrence of empty spraying; and the ink in the secondary ink cartridge and the primary ink cartridge continuously circulate, which also reduces the generation of precipitation and prevents the precipitation from clogging the pipeline or the print head.

[0004] However, for print heads with higher printing accuracy, they are more sensitive to the bubble content in the ink, the temperature of the ink, and the pressure changes of the ink. Because the high bubble content in the ink will cause empty spray and short lines in the printing, and the temperature of the ink will affect the viscosity of the ink, and the pressure changes of the ink will affect the size of the ink droplets, which will also affect the quality of printing. Especially for water-based inks with lower viscosity, the particles in them cannot be suspended. Compared with water-based inks with higher viscosity, the particles are easier to precipitate, and after precipitation, they will clog the print head or ink supply channel, thereby affecting printing or damaging the print head; and for special printing requirements, the water-based ink is often required to have a lower viscosity than at room temperature, so the ink needs to be heated, so that the particles in the ink are easier to precipitate. Therefore, for the combination of high-printing-accuracy print heads and low-viscosity water-based inks, it is necessary to have the following characteristics:

[0005] ① The bubble content in the ink entering the print head should be low;

[0006] ②The temperature of the ink entering the print head must be kept appropriate and constant;

[0007] ③The pressure fluctuation of the ink in the secondary ink cartridge should be as small as possible;

[0008] ④ The ink in the ink supply system should always keep flowing to avoid the precipitation of particles;

[0009] ⑤ The ink inlet and outlet of the print head should always maintain a constant pressure difference to keep the ink flowing through the print head at a continuous high speed, thereby avoiding the ink in the print head from clogging the print head due to sedimentation. Summary of the invention

[0010] The present invention is intended to provide a secondary ink cartridge assembly for a printer to solve the deficiencies in the prior art. The technical problem to be solved by the present invention is achieved through the following technical solutions.

[0011] A secondary ink cartridge assembly for a printer comprises a secondary ink cartridge body, the secondary ink cartridge body comprises an ink cartridge body and an ink cartridge cover which are sealed and covered with each other, the ink cartridge body is provided with a high-pressure ink chamber, a low-pressure ink chamber and a normal-pressure ink chamber, the high-pressure ink chamber, the low-pressure ink chamber and the normal-pressure ink chamber are respectively provided with a first liquid level sensor, a second liquid level sensor and a third liquid level sensor, the high-pressure ink chamber is sequentially connected with a print head, a low-pressure ink chamber, a normal-pressure ink chamber, a second ink pump, a bubble removal device and a first ink pump, so that ink flows out of the high-pressure ink chamber, flows through the print head, the low-pressure ink chamber, the second ink pump, the normal-pressure ink chamber, the first ink pump and the bubble removal device in sequence, and then flows back to the high-pressure ink chamber, thereby forming a self-circulating ink path; the first ink pump and the second ink pump are diaphragm pumps, a first damper is provided between the first ink pump and the bubble removal device, and a second damper is provided between the second ink pump and the normal-pressure ink chamber.

[0012] Preferably, a plurality of first air-controlled liquid valves are installed at the lower end of the high-pressure ink chamber, and a plurality of second air-controlled liquid valves are installed at the lower end of the low-pressure ink chamber. The high-pressure ink chamber is connected to the ink inlet of the print head through the first air-controlled liquid valve, and the ink outlet of the print head is connected to the low-pressure ink chamber through the second air-controlled liquid valve.

[0013] Preferably, temperature control devices are respectively provided on the outer side walls of the high-pressure ink chamber, the low-pressure ink chamber and the normal-pressure ink chamber, and the temperature control devices include a heating plate, a thermal protector and a temperature sensor.

[0014] Preferably, the high-pressure ink chamber and the low-pressure ink chamber are arranged in parallel front and back and match each other, and the normal-pressure ink chamber is arranged on one side of the high-pressure ink chamber and the low-pressure ink chamber.

[0015] Preferably, an arc-shaped groove is provided at a corner of the ink cartridge body, and the bubble removal device is arranged in the arc-shaped groove.

[0016] Preferably, the arc-shaped groove (114) is arranged at a corner of the normal pressure ink chamber (113) side of the ink cartridge body (11).

[0017] The present invention provides a secondary ink cartridge assembly for a printer, which has the following beneficial effects:

[0018] 1) The ink cartridge body is provided with a high-pressure ink chamber and a low-pressure ink chamber, so that the ink passes through the high-pressure ink chamber, the print head, and the low-pressure ink chamber to form a self-circulating ink path, thereby keeping the ink flowing continuously and avoiding the precipitation of particles in the ink;

[0019] 2) The self-circulating ink path passes through the print head. The pressure difference between the high-pressure ink chamber and the low-pressure ink chamber enables the ink in the print head other than that used for printing to maintain a continuous high-speed flow, thereby preventing the ink in the print head from precipitating;

[0020] 3) The ink in the low-pressure ink chamber in the self-circulating ink circuit flows into the high-pressure ink chamber after being processed by the debubbling device, and the ink replenished into the high-pressure ink chamber from the main ink tank is only the ink consumed by printing, which only accounts for a small part of the ink in the high-pressure ink chamber. Therefore, most of the ink entering the high-pressure ink chamber is the ink that has been debubbled multiple times in the self-circulating ink circuit. Compared with the debubbling effect in the circulating ink circuit between the secondary ink cartridge and the main ink tank in the prior art, the debubbling effect is repeatedly superimposed, and the effect is better;

[0021] 4) Temperature control devices are provided on both the high-pressure ink chamber side and the low-pressure ink chamber side of the secondary ink cartridge body, and the ink added from the main ink tank to the high-pressure ink chamber is only the ink used for printing, which accounts for a small part of the ink in the high-pressure ink chamber. This makes the amount of ink in the main ink tank mixed in the high-pressure ink chamber less, so that the temperature of the ink entering the print head is more constant, and the printing quality is better;

[0022] 5) In order to maintain the pressure difference between the ink inlet and the ink outlet of the print head, the ink volume in the high-pressure ink chamber and the low-pressure ink chamber must be continuously adjusted by the ink pump during the ink self-circulation process to adjust the liquid level, so that a suitable and constant pressure difference is always maintained between the ink inlet and the ink outlet of the print head, so that the ink always keeps a high-speed flow. However, the reaction sensitivity of the ink pump is not enough to match the change of the pressure difference in the high-pressure ink chamber and the low-pressure ink chamber. Therefore, a normal-pressure ink chamber is set in the ink cartridge body. The normal-pressure ink chamber serves as a buffer ink chamber between the high-pressure ink chamber and the low-pressure ink chamber, and has a small effect on the pressure in the high-pressure ink chamber and the low-pressure ink chamber, so that the pressure in the high-pressure ink chamber and the low-pressure ink chamber can be adjusted more sensitively and stably by the ink pump;

[0023] 6) The setting of the normal pressure ink chamber can not only realize the stable operation of the self-circulating ink circuit, but also reheat the ink before entering the high pressure ink chamber, which can ensure the constant temperature of the ink in the high pressure ink chamber;

[0024] 7) Compared with the electric control valve, the air control valve will not heat up after long-term use, so that the temperature of the ink entering the print head remains constant, avoiding the influence of the electric control valve on the viscosity of the ink caused by the long-term heating;

[0025] 8) The setting of the first damper and the second damper reduces the liquid fluctuation generated by the diaphragm pump, thereby reducing the ink pressure fluctuation, making the ink supply pressure more stable, thereby improving the printing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the present invention;

[0027] Figure 2 It is a structural schematic diagram of another angle of the present invention;

[0028] Figure 3 It is a structural schematic diagram of the ink cartridge body of the present invention;

[0029] The reference numerals in the accompanying drawings are: 11, ink cartridge body, 111, high-pressure ink chamber, 112, low-pressure ink chamber, 113, normal-pressure ink chamber, 114, arc-shaped groove, 12, ink cartridge cover, 21, first air-controlled liquid valve, 22, second air-controlled liquid valve, 31, first ink pump, 32, second ink pump, 41, first damper, 42, second damper, 5, debubble device, 61, first liquid level sensor, 62, second liquid level sensor, 63, third liquid level sensor, 71, heating plate, 72, thermal protector, 73, temperature sensor DETAILED DESCRIPTION

[0030] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0031] Reference Figures 1 to 3 As shown, a secondary ink cartridge assembly for a printer, the improvement of which is that it includes a secondary ink cartridge body, the secondary ink cartridge body includes an ink cartridge body 11 and an ink cartridge cover 12 which are sealed and covered with each other, a high-pressure ink chamber 111, a low-pressure ink chamber 112 and a normal-pressure ink chamber 113 are arranged in the ink cartridge body 11, and liquid level sensors are respectively arranged in the high-pressure ink chamber 111, the low-pressure ink chamber 112 and the normal-pressure ink chamber 113, the high-pressure ink chamber 111 is connected with the print head, the low-pressure ink chamber 112, the normal-pressure ink chamber 113, the second ink pump 32, the bubble removal device 5 and the first ink pump 31 in sequence, so that ink flows out of the high-pressure ink chamber 111, flows through the print head, the low-pressure ink chamber 112, the second ink pump 32, the normal-pressure ink chamber 113, the first ink pump 31 and the bubble removal device 5 in sequence, and then flows back to the high-pressure ink chamber 111, thereby forming a self-circulating ink path.

[0032] In this embodiment, the ink outlet of the high-pressure ink chamber 111 is connected to the ink inlet of the print head, the ink outlet of the print head is connected to the ink inlet of the low-pressure ink chamber 112, the ink outlet of the low-pressure ink chamber 112 is connected to the ink inlet of the normal-pressure ink chamber 113 through the second ink pump 32, the ink outlet of the normal-pressure ink chamber 113 is connected to the ink inlet of the debubble device 5 through the first ink pump 31, and the ink outlet of the debubble device 5 is connected to the ink inlet of the high-pressure ink chamber 111. The main ink tank is connected to another ink inlet of the debubble device 5 through the third ink pump, the filter, and the valve, and is used to replenish the ink consumed by the printing operation into the high-pressure ink chamber 111.

[0033] The high-pressure ink chamber 111 is connected to the high-pressure air circuit, and the low-pressure ink chamber 112 is connected to the low-pressure air circuit. The high-pressure air circuit and the low-pressure air circuit respectively adjust the negative pressure in the high-pressure ink chamber 111 and the low-pressure ink chamber 112 to maintain a constant pressure difference between the high-pressure ink chamber 111 and the low-pressure ink chamber 112, so that the ink inlet and the ink outlet of the print head maintain a constant and appropriate pressure difference, so that the ink in the print head continues to flow at a high speed; and the low-pressure ink chamber 112 and the normal-pressure ink chamber 113, and the normal-pressure ink chamber 113 and the high-pressure ink chamber 111 are respectively maintained to flow ink at a high speed through the second ink pump 32 and the first ink pump 31, thereby ensuring the normal operation of the self-circulating ink circuit. In order to ensure that the pressure difference between the high-pressure ink chamber 111 and the low-pressure ink chamber 112 is constant, it is necessary to always maintain appropriate liquid levels in the high-pressure ink chamber 111 and the low-pressure ink chamber 112. At this time, it is also necessary to adjust the liquid levels in the high-pressure ink chamber 111 and the low-pressure ink chamber 112 through the first ink pump 31 and the second ink pump 32 to keep the pressure difference between the high-pressure ink chamber 111 and the low-pressure ink chamber 112 constant, so that the pressure difference between the ink inlet and the ink outlet of the print head remains constant, thereby avoiding affecting the ink jetting of the print head when the printer is printing.

[0034] The ink supply system workflow of the printer is:

[0035] When the printer is not printing, in order to ensure that the ink in the secondary ink cartridge body and the print nozzle does not precipitate, the self-circulating ink circuit needs to keep running. At this time, the ink flows out of the high-pressure ink chamber 111 into the print nozzle. Under the action of the pressure difference, the ink flowing out of the print nozzle enters the low-pressure ink chamber 112. The ink in the low-pressure ink chamber 112 enters the normal-pressure ink chamber 113 under the action of the second ink pump 32. The ink in the normal-pressure ink chamber 113 flows out under the action of the first ink pump 31 and enters the debubble device 5. After being debubbled, it flows back to the high-pressure ink chamber 111.

[0036] When the printer is performing a printing operation, the working process of the self-circulating ink circuit is the same as above, but since the printing operation of the print head will consume a portion of the ink, this portion of the ink is replenished by the main ink tank. Under the action of the ink pump, the ink in the main ink tank is filtered out for impurities by the filter, and then enters the debubble device 5 through the valve. After the bubbles are removed by the debubble device 5, it enters the high-pressure ink chamber 111. This portion of ink is only the ink consumed by printing and only occupies a small portion of the ink in the high-pressure ink chamber 111.

[0037] The present embodiment provides a secondary ink cartridge assembly for a printer, wherein a high-pressure ink chamber 111 and a low-pressure ink chamber 112 are arranged in an ink cartridge body 11, so that the ink forms a self-circulating ink path between the high-pressure ink chamber 111, the print nozzle, and the low-pressure ink chamber 112, thereby maintaining a continuous flow of ink and preventing the particles in the ink from being precipitated; the self-circulating ink path passes through the print nozzle, and the pressure difference between the high-pressure ink chamber 111 and the low-pressure ink chamber 112 enables the ink in the print nozzle other than that used for printing to maintain a continuous high-speed flow, which can effectively prevent the ink in the print nozzle from being precipitated; the ink in the low-pressure ink chamber 112 in the self-circulating ink path flows into the high-pressure ink chamber 111 after being processed by the debubbling device 5, and the ink replenished into the high-pressure ink chamber 111 from the main ink tank is only the ink consumed for printing, which only accounts for a small part of the ink in the high-pressure ink chamber 111, so that most of the ink entering the high-pressure ink chamber 111 is the ink after multiple cycles of debubbling in the self-circulating ink path, which is much smaller than the ink in the circulating ink path between the secondary ink cartridge and the main ink tank in the prior art. In terms of the bubble removal effect, the bubble removal effect is repeated and superimposed, and the effect is better; in order to maintain the pressure difference between the ink inlet and the ink outlet of the print head, the ink amount in the high-pressure ink chamber 111 and the low-pressure ink chamber 112 needs to be continuously adjusted by the ink pump during the ink self-circulation process to adjust the liquid level height, so that the appropriate and constant pressure difference is always maintained between the ink inlet and the ink outlet of the print head, so that the ink always keeps a high-speed flow, and the reaction sensitivity of the ink pump is not enough to keep up with the pressure difference in the high-pressure ink chamber 111 and the low-pressure ink chamber 112. In order to match the change of the force difference, a normal-pressure ink chamber 113 is provided in the ink cartridge body. The normal-pressure ink chamber 113 serves as a buffer ink chamber between the high-pressure ink chamber and the low-pressure ink chamber. The pressure in the normal-pressure ink chamber 113 always remains at normal pressure, and has no effect on the pressures in the high-pressure ink chamber 111 and the low-pressure ink chamber 112. This allows the pressure in the high-pressure ink chamber 111 and the low-pressure ink chamber 112 to be adjusted more sensitively and stably by the ink pump, thereby avoiding interference to the ink pumping work of the ink pump due to simultaneous changes in the pressure values ​​in the high-pressure ink chamber 111 and the low-pressure ink chamber 112.

[0038] Furthermore, the liquid level sensor includes a first liquid level sensor 61 disposed in the high-pressure ink chamber 111 , a second liquid level sensor 62 disposed in the low-pressure ink chamber 112 , and a third liquid level sensor 63 disposed in the normal-pressure ink chamber 113 .

[0039] In this embodiment, the first liquid level sensor 61 is used to detect the liquid level in the high-pressure ink chamber 111, so that when the high-pressure ink chamber 111 is short of ink, a signal is sent to the control system, and the control system controls the main ink tank to add ink to the high-pressure ink chamber 111. This situation usually occurs when the printer is printing. The second liquid level sensor 62 is used to detect the liquid level in the low-pressure ink chamber 112, so that when the liquid level in the low-pressure ink chamber 112 is too high, the second ink pump 32 is used to pump ink into the normal-pressure ink chamber 113 in time to maintain the constant liquid level in the low-pressure ink chamber 112. The third liquid level sensor 62 is used to detect the liquid level in the normal-pressure ink chamber 113, so that when the liquid level in the normal-pressure ink chamber 113 is high, the first ink pump 31 is used to pump ink into the high-pressure ink chamber 111 in time, thereby maintaining the circulation of the self-circulating ink circuit.

[0040] Furthermore, a plurality of first air-controlled liquid valves 21 are installed at the lower end of the high-pressure ink chamber 111, and a plurality of second air-controlled liquid valves 22 are installed at the lower end of the low-pressure ink chamber 112. The high-pressure ink chamber 111 is connected to the ink inlet of the print head through the first air-controlled liquid valve 21, and the ink outlet of the print head is connected to the low-pressure ink chamber 112 through the second air-controlled liquid valve 22.

[0041] In this embodiment, an electrically controlled liquid valve is usually used in a conventional printer to control the ink path connection between the secondary ink cartridge and the print head. The electrically controlled liquid valve will generate heat after being used for a certain period of time, thereby affecting the temperature of the ink entering the print head. In this embodiment, an air-controlled liquid valve 22 is used to replace the electrically controlled liquid valve in the conventional printer. By operating the pneumatically controlled liquid valve, there is no self-heating, which can effectively avoid affecting the temperature and viscosity of the ink.

[0042] Furthermore, the first ink pump 31 and the second ink pump 32 are diaphragm pumps, a first damper 41 is provided between the first ink pump 31 and the debubble device 5 , and a second damper 42 is provided between the second ink pump 32 and the normal pressure ink chamber 113 .

[0043] In this embodiment, the diaphragm pump has strong adaptability and tolerance to the viscosity, performance and other characteristics of the ink, but the operation of the diaphragm pump will cause fluctuations in the liquid. The setting of the first damper 41 and the second damper 42 reduces the liquid fluctuations generated by the diaphragm pump, thereby reducing the ink pressure fluctuations, making the ink supply pressure more stable, thereby improving the printing quality.

[0044] Furthermore, temperature control devices are respectively provided on the outer side walls of the high-pressure ink chamber 111 , the low-pressure ink chamber 112 and the normal-pressure ink chamber 113 , and the temperature control devices include a heating plate, a thermal protector and a temperature sensor.

[0045] In this embodiment, the heating plate is used to heat the high-pressure ink chamber 111, the low-pressure ink chamber 112 and the normal-pressure ink chamber 113 respectively, and the temperature sensor is used to detect the temperature of the ink in the high-pressure ink chamber 111, the low-pressure ink chamber 112 and the normal-pressure ink chamber 113 respectively, and transmit the temperature parameters to the control system, the control system controls the heating work of the heating plate, and the thermal protector is used to prevent the temperature of the heating plate from overheating. In this embodiment, the setting of the temperature control device performs a constant temperature treatment on the ink in the high-pressure ink chamber 111 to keep the ink entering the print head at a constant temperature, performs a constant temperature treatment on the ink in the low-pressure ink chamber 112 to compensate for the heat loss caused by the ink circulating into the print head, and performs a constant temperature treatment on the ink in the normal-pressure ink chamber 113, which can perform secondary heating on the ink flowing out of the low-pressure ink chamber 112, and can better ensure the constant temperature of the ink in the high-pressure ink chamber, and then ensure the constant temperature of the ink entering the print head.

[0046] Furthermore, the high-pressure ink chamber 111 and the low-pressure ink chamber 112 are arranged in parallel front and back and match each other, and the normal-pressure ink chamber 113 is arranged on one side of the high-pressure ink chamber 111 and the low-pressure ink chamber 112 .

[0047] Furthermore, an arc-shaped groove 114 is provided at a corner of the ink cartridge body 11 , and the debubble removal device 5 is disposed in the arc-shaped groove 114 .

[0048] Furthermore, the arc-shaped groove 114 is disposed at a corner of the normal-pressure ink chamber 113 side of the ink cartridge body 11 .

[0049] In this embodiment, the arrangement of the arc-shaped groove 114 makes the overall structure of the secondary ink cartridge assembly more compact. The arc-shaped groove 114 is arranged at a corner of the normal-pressure ink chamber 113 of the ink cartridge body 11, so as not to affect the volume of the high-pressure ink chamber 111 or the low-pressure ink chamber 112, so that the high-pressure ink chamber 111 and the low-pressure ink chamber 112 match each other, thereby making it easier to adjust the pressure in the high-pressure ink chamber 111 and the low-pressure ink chamber 112.

[0050] It should be noted that the above detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present application belongs.

[0051] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments described in the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0052] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0053] In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or inherent to these processes, methods, products, or apparatuses.

[0054] For ease of description, spatially relative terms, such as "above", "above", "on the upper surface of", "above", etc., may be used herein to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways, such as rotated 90 degrees or in other orientations, and the spatially relative descriptions used herein are interpreted accordingly.

[0055] In the above detailed description, reference is made to the accompanying drawings, which form a part of this document. In the accompanying drawings, similar symbols typically identify similar components unless the context indicates otherwise. The illustrated embodiments described in the detailed description, drawings, and claims are not meant to be limiting. Other embodiments may be used, and other changes may be made, without departing from the spirit or scope of the subject matter presented herein.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A secondary ink cartridge assembly for a printer, characterized in that: The invention comprises a secondary ink cartridge body, wherein the secondary ink cartridge body comprises an ink cartridge body (11) and an ink cartridge cover (12) which are sealed and covered with each other, wherein a high-pressure ink chamber (111), a low-pressure ink chamber (112) and a normal-pressure ink chamber (113) are arranged in the ink cartridge body (11), wherein the high-pressure ink chamber (111), the low-pressure ink chamber (112) and the normal-pressure ink chamber (113) are respectively provided with a first liquid level sensor (61), a second liquid level sensor (62) and a third liquid level sensor (63), wherein the high-pressure ink chamber (111) is connected in sequence to a print head, a low-pressure ink chamber (112), a normal-pressure ink chamber (113), a second ink pump (32), and a bubble removal device (5). , and the first ink pump (31) are connected so that ink flows out of the high-pressure ink chamber (111), flows through the print head, the low-pressure ink chamber (112), the second ink pump (32), the normal-pressure ink chamber (113), the first ink pump (31), and the bubble removal device (5) in sequence, and then flows back to the high-pressure ink chamber (111), thereby forming a self-circulating ink path; the first ink pump (31) and the second ink pump (32) are diaphragm pumps, a first damper (41) is arranged between the first ink pump (31) and the bubble removal device (5), and a second damper (42) is arranged between the second ink pump (32) and the normal-pressure ink chamber (113).

2. A secondary ink cartridge assembly for a printer according to claim 1, characterized in that: A plurality of first air-controlled liquid valves (21) are installed at the lower end of the high-pressure ink chamber (111), and a plurality of second air-controlled liquid valves (22) are installed at the lower end of the low-pressure ink chamber (112); the high-pressure ink chamber (111) is connected to the ink inlet of the print head through the first air-controlled liquid valve (21), and the ink outlet of the print head is connected to the low-pressure ink chamber (112) through the second air-controlled liquid valve (22).

3. A secondary ink cartridge assembly for a printer according to claim 1, characterized in that: Temperature control devices are respectively arranged on the outer side walls of the high-pressure ink chamber (111), the low-pressure ink chamber (112) and the normal-pressure ink chamber (113), and the temperature control devices include a heating plate, a thermal protector and a temperature sensor.

4. A secondary ink cartridge assembly for a printer according to claim 1, characterized in that: The high-pressure ink chamber (111) and the low-pressure ink chamber (112) are arranged in parallel front and back and match each other, and the normal-pressure ink chamber (113) is arranged on one side of the high-pressure ink chamber (111) and the low-pressure ink chamber (112).

5. The secondary ink cartridge assembly for a printer according to claim 1, characterized in that: An arc-shaped groove (114) is provided at a corner of the ink cartridge body (11), and the bubble removal device (5) is arranged in the arc-shaped groove (114).

6. A secondary ink cartridge assembly for a printer according to claim 5, characterized in that: The arc-shaped groove (114) is arranged at a corner of the normal pressure ink chamber (113) side of the ink cartridge body (11).

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